diff options
| author | Harald Welte <laforge@gnumonks.org> | 2017-10-25 22:31:59 +0200 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2017-10-26 00:06:40 +0200 |
| commit | ed03661871ac8ee1715c04390d25631537b084ac (patch) | |
| tree | 39aeda51387ba5af9ebd44a552163fa0d0345e52 /openbsc/src | |
| parent | 888e35aa7fbb2ba40526456abab739b7c15013e0 (diff) | |
remove sgsn, gbproxy and gtphub from openbsc.git
The GPRS related programs osmo-sgsn, osmo-gtphub and osmo-gbproxy
have been split off into the separate osmo-sgsn repository, which
can be found at
git://git.osmocom.org/osmo-sgsn.git
http://git.osmocom.org/osmo-sgsn/
This is technically unrelated but conceptually part of the larger
NITB-split activities.
I did a brief log of all changes in src/gprs and couldn't find any
commits that we might have applied here but which are missing from
osmo-sgsn.git.
Change-Id: If60e28b23f5cfb2c4eb354951363a2bb63f3e0de
Diffstat (limited to 'openbsc/src')
40 files changed, 0 insertions, 25043 deletions
diff --git a/openbsc/src/Makefile.am b/openbsc/src/Makefile.am index cfad7dfea..e579ea0fc 100644 --- a/openbsc/src/Makefile.am +++ b/openbsc/src/Makefile.am @@ -43,7 +43,6 @@ SUBDIRS += \ osmo-bsc_mgcp \ utils \ ipaccess \ - gprs \ $(NULL) # Conditional Programs diff --git a/openbsc/src/gprs/.gitignore b/openbsc/src/gprs/.gitignore deleted file mode 100644 index 7cfefbac2..000000000 --- a/openbsc/src/gprs/.gitignore +++ /dev/null @@ -1,2 +0,0 @@ -gsn_restart -osmo_*.cfg* diff --git a/openbsc/src/gprs/Makefile.am b/openbsc/src/gprs/Makefile.am deleted file mode 100644 index cb0997902..000000000 --- a/openbsc/src/gprs/Makefile.am +++ /dev/null @@ -1,132 +0,0 @@ -AM_CPPFLAGS = \ - $(all_includes) \ - -I$(top_srcdir)/include \ - -I$(top_builddir) \ - $(NULL) - -AM_CFLAGS = \ - -Wall \ - -fno-strict-aliasing \ - $(LIBOSMOCORE_CFLAGS) \ - $(LIBOSMOGSM_CFLAGS) \ - $(LIBOSMOVTY_CFLAGS) \ - $(LIBOSMOCTRL_CFLAGS) \ - $(LIBOSMOABIS_CFLAGS) \ - $(LIBOSMOGB_CFLAGS) \ - $(COVERAGE_CFLAGS) \ - $(LIBCARES_CFLAGS) \ - $(LIBCRYPTO_CFLAGS) \ - $(LIBGTP_CFLAGS) \ - $(NULL) -if BUILD_IU -AM_CFLAGS += \ - $(LIBASN1C_CFLAGS) \ - $(LIBOSMOSIGTRAN_CFLAGS) \ - $(LIBOSMORANAP_CFLAGS) \ - $(NULL) -endif - -OSMO_LIBS = \ - $(LIBOSMOCORE_LIBS) \ - $(LIBOSMOABIS_LIBS) \ - $(LIBOSMOGSM_LIBS) \ - $(LIBOSMOVTY_LIBS) \ - $(LIBOSMOCTRL_LIBS) \ - $(LIBOSMOGB_LIBS) \ - $(LIBGTP_LIBS) \ - $(NULL) - -bin_PROGRAMS = \ - osmo-gbproxy \ - $(NULL) -if HAVE_LIBGTP -if HAVE_LIBCARES -bin_PROGRAMS += \ - osmo-sgsn \ - osmo-gtphub \ - $(NULL) -endif -endif - -osmo_gbproxy_SOURCES = \ - gb_proxy.c \ - gb_proxy_main.c \ - gb_proxy_vty.c \ - gb_proxy_patch.c \ - gb_proxy_tlli.c \ - gb_proxy_peer.c \ - gprs_gb_parse.c \ - gprs_llc_parse.c \ - crc24.c \ - gprs_utils.c \ - $(NULL) -osmo_gbproxy_LDADD = \ - $(top_builddir)/src/libcommon/libcommon.a \ - $(OSMO_LIBS) \ - $(LIBCRYPTO_LIBS) \ - -lrt \ - $(NULL) - -osmo_sgsn_SOURCES = \ - gprs_gmm.c \ - gprs_sgsn.c \ - gprs_sndcp.c \ - gprs_sndcp_comp.c \ - gprs_sndcp_dcomp.c \ - gprs_sndcp_pcomp.c \ - gprs_sndcp_vty.c \ - gprs_sndcp_xid.c \ - sgsn_main.c \ - sgsn_vty.c \ - sgsn_libgtp.c \ - gprs_llc.c \ - gprs_llc_parse.c \ - gprs_llc_vty.c \ - crc24.c \ - sgsn_ctrl.c \ - sgsn_auth.c \ - gprs_subscriber.c \ - gprs_utils.c \ - sgsn_cdr.c \ - sgsn_ares.c \ - slhc.c \ - gprs_llc_xid.c \ - v42bis.c \ - $(NULL) -osmo_sgsn_LDADD = \ - $(top_builddir)/src/libcommon/libcommon.a \ - $(OSMO_LIBS) \ - $(LIBOSMOABIS_LIBS) \ - $(LIBCARES_LIBS) \ - $(LIBCRYPTO_LIBS) \ - $(LIBGTP_LIBS) \ - -lrt \ - -lm \ - $(NULL) -if BUILD_IU -osmo_sgsn_LDADD += \ - $(top_builddir)/src/libiu/libiu.a \ - $(LIBOSMOSIGTRAN_LIBS) \ - $(LIBOSMORANAP_LIBS) \ - $(LIBASN1C_LIBS) \ - $(NULL) -endif - -osmo_gtphub_SOURCES = \ - gtphub_main.c \ - gtphub.c \ - gtphub_sock.c \ - gtphub_ares.c \ - gtphub_vty.c \ - sgsn_ares.c \ - gprs_utils.c \ - $(NULL) -osmo_gtphub_LDADD = \ - $(top_builddir)/src/libcommon/libcommon.a \ - $(LIBOSMOCORE_LIBS) \ - $(LIBOSMOGSM_LIBS) \ - $(LIBOSMOVTY_LIBS) \ - $(LIBCARES_LIBS) \ - $(LIBGTP_LIBS) \ - -lrt \ - $(NULL) diff --git a/openbsc/src/gprs/crc24.c b/openbsc/src/gprs/crc24.c deleted file mode 100644 index 1a420ed66..000000000 --- a/openbsc/src/gprs/crc24.c +++ /dev/null @@ -1,67 +0,0 @@ -/* GPRS LLC CRC-24 Implementation */ - -/* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org> - * - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <openbsc/crc24.h> - -/* CRC24 table - FCS */ -static const uint32_t tbl_crc24[256] = { - 0x00000000, 0x00d6a776, 0x00f64557, 0x0020e221, 0x00b78115, 0x00612663, 0x0041c442, 0x00976334, - 0x00340991, 0x00e2aee7, 0x00c24cc6, 0x0014ebb0, 0x00838884, 0x00552ff2, 0x0075cdd3, 0x00a36aa5, - 0x00681322, 0x00beb454, 0x009e5675, 0x0048f103, 0x00df9237, 0x00093541, 0x0029d760, 0x00ff7016, - 0x005c1ab3, 0x008abdc5, 0x00aa5fe4, 0x007cf892, 0x00eb9ba6, 0x003d3cd0, 0x001ddef1, 0x00cb7987, - 0x00d02644, 0x00068132, 0x00266313, 0x00f0c465, 0x0067a751, 0x00b10027, 0x0091e206, 0x00474570, - 0x00e42fd5, 0x003288a3, 0x00126a82, 0x00c4cdf4, 0x0053aec0, 0x008509b6, 0x00a5eb97, 0x00734ce1, - 0x00b83566, 0x006e9210, 0x004e7031, 0x0098d747, 0x000fb473, 0x00d91305, 0x00f9f124, 0x002f5652, - 0x008c3cf7, 0x005a9b81, 0x007a79a0, 0x00acded6, 0x003bbde2, 0x00ed1a94, 0x00cdf8b5, 0x001b5fc3, - 0x00fb4733, 0x002de045, 0x000d0264, 0x00dba512, 0x004cc626, 0x009a6150, 0x00ba8371, 0x006c2407, - 0x00cf4ea2, 0x0019e9d4, 0x00390bf5, 0x00efac83, 0x0078cfb7, 0x00ae68c1, 0x008e8ae0, 0x00582d96, - 0x00935411, 0x0045f367, 0x00651146, 0x00b3b630, 0x0024d504, 0x00f27272, 0x00d29053, 0x00043725, - 0x00a75d80, 0x0071faf6, 0x005118d7, 0x0087bfa1, 0x0010dc95, 0x00c67be3, 0x00e699c2, 0x00303eb4, - 0x002b6177, 0x00fdc601, 0x00dd2420, 0x000b8356, 0x009ce062, 0x004a4714, 0x006aa535, 0x00bc0243, - 0x001f68e6, 0x00c9cf90, 0x00e92db1, 0x003f8ac7, 0x00a8e9f3, 0x007e4e85, 0x005eaca4, 0x00880bd2, - 0x00437255, 0x0095d523, 0x00b53702, 0x00639074, 0x00f4f340, 0x00225436, 0x0002b617, 0x00d41161, - 0x00777bc4, 0x00a1dcb2, 0x00813e93, 0x005799e5, 0x00c0fad1, 0x00165da7, 0x0036bf86, 0x00e018f0, - 0x00ad85dd, 0x007b22ab, 0x005bc08a, 0x008d67fc, 0x001a04c8, 0x00cca3be, 0x00ec419f, 0x003ae6e9, - 0x00998c4c, 0x004f2b3a, 0x006fc91b, 0x00b96e6d, 0x002e0d59, 0x00f8aa2f, 0x00d8480e, 0x000eef78, - 0x00c596ff, 0x00133189, 0x0033d3a8, 0x00e574de, 0x007217ea, 0x00a4b09c, 0x008452bd, 0x0052f5cb, - 0x00f19f6e, 0x00273818, 0x0007da39, 0x00d17d4f, 0x00461e7b, 0x0090b90d, 0x00b05b2c, 0x0066fc5a, - 0x007da399, 0x00ab04ef, 0x008be6ce, 0x005d41b8, 0x00ca228c, 0x001c85fa, 0x003c67db, 0x00eac0ad, - 0x0049aa08, 0x009f0d7e, 0x00bfef5f, 0x00694829, 0x00fe2b1d, 0x00288c6b, 0x00086e4a, 0x00dec93c, - 0x0015b0bb, 0x00c317cd, 0x00e3f5ec, 0x0035529a, 0x00a231ae, 0x007496d8, 0x005474f9, 0x0082d38f, - 0x0021b92a, 0x00f71e5c, 0x00d7fc7d, 0x00015b0b, 0x0096383f, 0x00409f49, 0x00607d68, 0x00b6da1e, - 0x0056c2ee, 0x00806598, 0x00a087b9, 0x007620cf, 0x00e143fb, 0x0037e48d, 0x001706ac, 0x00c1a1da, - 0x0062cb7f, 0x00b46c09, 0x00948e28, 0x0042295e, 0x00d54a6a, 0x0003ed1c, 0x00230f3d, 0x00f5a84b, - 0x003ed1cc, 0x00e876ba, 0x00c8949b, 0x001e33ed, 0x008950d9, 0x005ff7af, 0x007f158e, 0x00a9b2f8, - 0x000ad85d, 0x00dc7f2b, 0x00fc9d0a, 0x002a3a7c, 0x00bd5948, 0x006bfe3e, 0x004b1c1f, 0x009dbb69, - 0x0086e4aa, 0x005043dc, 0x0070a1fd, 0x00a6068b, 0x003165bf, 0x00e7c2c9, 0x00c720e8, 0x0011879e, - 0x00b2ed3b, 0x00644a4d, 0x0044a86c, 0x00920f1a, 0x00056c2e, 0x00d3cb58, 0x00f32979, 0x00258e0f, - 0x00eef788, 0x003850fe, 0x0018b2df, 0x00ce15a9, 0x0059769d, 0x008fd1eb, 0x00af33ca, 0x007994bc, - 0x00dafe19, 0x000c596f, 0x002cbb4e, 0x00fa1c38, 0x006d7f0c, 0x00bbd87a, 0x009b3a5b, 0x004d9d2d -}; - -#define INIT_CRC24 0xffffff - -uint32_t crc24_calc(uint32_t fcs, uint8_t *cp, unsigned int len) -{ - while (len--) - fcs = (fcs >> 8) ^ tbl_crc24[(fcs ^ *cp++) & 0xff]; - return fcs; -} diff --git a/openbsc/src/gprs/gb_proxy.c b/openbsc/src/gprs/gb_proxy.c deleted file mode 100644 index cd38d23bf..000000000 --- a/openbsc/src/gprs/gb_proxy.c +++ /dev/null @@ -1,1438 +0,0 @@ -/* NS-over-IP proxy */ - -/* (C) 2010 by Harald Welte <laforge@gnumonks.org> - * (C) 2010-2013 by On-Waves - * (C) 2013 by Holger Hans Peter Freyther - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <unistd.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <getopt.h> -#include <errno.h> -#include <sys/fcntl.h> -#include <sys/stat.h> -#include <arpa/inet.h> -#include <time.h> - -#include <osmocom/core/talloc.h> -#include <osmocom/core/select.h> -#include <osmocom/core/rate_ctr.h> -#include <osmocom/core/stats.h> - -#include <osmocom/gprs/gprs_ns.h> -#include <osmocom/gprs/gprs_bssgp.h> - -#include <osmocom/gsm/gsm_utils.h> - -#include <openbsc/signal.h> -#include <openbsc/debug.h> -#include <openbsc/gprs_gb_parse.h> -#include <openbsc/gb_proxy.h> - -#include <openbsc/gprs_llc.h> -#include <openbsc/gsm_04_08.h> -#include <osmocom/gsm/protocol/gsm_04_08_gprs.h> -#include <openbsc/gprs_utils.h> - -#include <openssl/rand.h> - -static const struct rate_ctr_desc global_ctr_description[] = { - { "inv-bvci", "Invalid BVC Identifier " }, - { "inv-lai", "Invalid Location Area Identifier" }, - { "inv-rai", "Invalid Routing Area Identifier " }, - { "inv-nsei", "No BVC established for NSEI " }, - { "proto-err.bss", "BSSGP protocol error (BSS )" }, - { "proto-err.sgsn", "BSSGP protocol error (SGSN)" }, - { "not-supp.bss", "Feature not supported (BSS )" }, - { "not-supp.sgsn", "Feature not supported (SGSN)" }, - { "restart.sgsn", "Restarted RESET procedure (SGSN)" }, - { "tx-err.sgsn", "NS Transmission error (SGSN)" }, - { "error", "Other error " }, - { "mod-peer-err", "Patch error: no peer " }, -}; - -static const struct rate_ctr_group_desc global_ctrg_desc = { - .group_name_prefix = "gbproxy.global", - .group_description = "GBProxy Global Statistics", - .num_ctr = ARRAY_SIZE(global_ctr_description), - .ctr_desc = global_ctr_description, - .class_id = OSMO_STATS_CLASS_GLOBAL, -}; - -static int gbprox_relay2peer(struct msgb *old_msg, struct gbproxy_peer *peer, - uint16_t ns_bvci); -static int gbprox_relay2sgsn(struct gbproxy_config *cfg, struct msgb *old_msg, - uint16_t ns_bvci, uint16_t sgsn_nsei); -static void gbproxy_reset_imsi_acquisition(struct gbproxy_link_info* link_info); - -static int check_peer_nsei(struct gbproxy_peer *peer, uint16_t nsei) -{ - if (peer->nsei != nsei) { - LOGP(DGPRS, LOGL_NOTICE, "Peer entry doesn't match current NSEI " - "BVCI=%u via NSEI=%u (expected NSEI=%u)\n", - peer->bvci, nsei, peer->nsei); - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_INV_NSEI]); - return 0; - } - - return 1; -} - -/* strip off the NS header */ -static void strip_ns_hdr(struct msgb *msg) -{ - int strip_len = msgb_bssgph(msg) - msg->data; - msgb_pull(msg, strip_len); -} - -/* Transmit Chapter 9.2.10 Identity Request */ -static void gprs_put_identity_req(struct msgb *msg, uint8_t id_type) -{ - struct gsm48_hdr *gh; - - id_type &= GSM_MI_TYPE_MASK; - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); - gh->proto_discr = GSM48_PDISC_MM_GPRS; - gh->msg_type = GSM48_MT_GMM_ID_REQ; - gh->data[0] = id_type; -} - -/* Transmit Chapter 9.4.6.2 Detach Accept (mobile originated detach) */ -static void gprs_put_mo_detach_acc(struct msgb *msg) -{ - struct gsm48_hdr *gh; - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); - gh->proto_discr = GSM48_PDISC_MM_GPRS; - gh->msg_type = GSM48_MT_GMM_DETACH_ACK; - gh->data[0] = 0; /* no force to standby */ -} - -static void gprs_push_llc_ui(struct msgb *msg, - int is_uplink, unsigned sapi, unsigned nu) -{ - const uint8_t e_bit = 0; - const uint8_t pm_bit = 1; - const uint8_t cr_bit = is_uplink ? 0 : 1; - uint8_t *llc; - uint8_t *fcs_field; - uint32_t fcs; - - nu &= 0x01ff; /* 9 Bit */ - - llc = msgb_push(msg, 3); - llc[0] = (cr_bit << 6) | (sapi & 0x0f); - llc[1] = 0xc0 | (nu >> 6); /* UI frame */ - llc[2] = (nu << 2) | ((e_bit & 1) << 1) | (pm_bit & 1); - - fcs = gprs_llc_fcs(llc, msgb_length(msg)); - fcs_field = msgb_put(msg, 3); - fcs_field[0] = (uint8_t)(fcs >> 0); - fcs_field[1] = (uint8_t)(fcs >> 8); - fcs_field[2] = (uint8_t)(fcs >> 16); -} - -static void gprs_push_bssgp_dl_unitdata(struct msgb *msg, - uint32_t tlli) -{ - struct bssgp_ud_hdr *budh; - uint8_t *llc = msgb_data(msg); - size_t llc_size = msgb_length(msg); - const size_t llc_ie_hdr_size = 3; - const uint8_t qos_profile[] = {0x00, 0x50, 0x20}; /* hard-coded */ - const uint8_t lifetime[] = {0x02, 0x58}; /* 6s hard-coded */ - - const size_t bssgp_overhead = sizeof(*budh) + - TVLV_GROSS_LEN(sizeof(lifetime)) + llc_ie_hdr_size; - uint8_t *ie; - uint32_t tlli_be = htonl(tlli); - - budh = (struct bssgp_ud_hdr *)msgb_push(msg, bssgp_overhead); - - budh->pdu_type = BSSGP_PDUT_DL_UNITDATA; - memcpy(&budh->tlli, &tlli_be, sizeof(budh->tlli)); - memcpy(&budh->qos_profile, qos_profile, sizeof(budh->qos_profile)); - - ie = budh->data; - tvlv_put(ie, BSSGP_IE_PDU_LIFETIME, sizeof(lifetime), lifetime); - ie += TVLV_GROSS_LEN(sizeof(lifetime)); - - /* Note: Add alignment before the LLC IE if inserting other IE */ - - *(ie++) = BSSGP_IE_LLC_PDU; - *(ie++) = llc_size / 256; - *(ie++) = llc_size % 256; - - OSMO_ASSERT(ie == llc); - - msgb_bssgph(msg) = (uint8_t *)budh; - msgb_tlli(msg) = tlli; -} - -/* update peer according to the BSS message */ -static void gbprox_update_current_raid(uint8_t *raid_enc, - struct gbproxy_peer *peer, - const char *log_text) -{ - struct gbproxy_patch_state *state = &peer->patch_state; - const int old_local_mcc = state->local_mcc; - const int old_local_mnc = state->local_mnc; - struct gprs_ra_id raid; - - if (!raid_enc) - return; - - gsm48_parse_ra(&raid, raid_enc); - - /* save source side MCC/MNC */ - if (!peer->cfg->core_mcc || raid.mcc == peer->cfg->core_mcc) { - state->local_mcc = 0; - } else { - state->local_mcc = raid.mcc; - } - - if (!peer->cfg->core_mnc || raid.mnc == peer->cfg->core_mnc) { - state->local_mnc = 0; - } else { - state->local_mnc = raid.mnc; - } - - if (old_local_mcc != state->local_mcc || - old_local_mnc != state->local_mnc) - LOGP(DGPRS, LOGL_NOTICE, - "Patching RAID %sactivated, msg: %s, " - "local: %d-%d, core: %d-%d\n", - state->local_mcc || state->local_mnc ? - "" : "de", - log_text, - state->local_mcc, state->local_mnc, - peer->cfg->core_mcc, peer->cfg->core_mnc); -} - -uint32_t gbproxy_make_bss_ptmsi(struct gbproxy_peer *peer, - uint32_t sgsn_ptmsi) -{ - uint32_t bss_ptmsi; - int max_retries = 23; - if (!peer->cfg->patch_ptmsi) { - bss_ptmsi = sgsn_ptmsi; - } else { - do { - if (RAND_bytes((uint8_t *) &bss_ptmsi, sizeof(bss_ptmsi)) != 1) { - bss_ptmsi = GSM_RESERVED_TMSI; - break; - } - - bss_ptmsi = bss_ptmsi | 0xC0000000; - - if (gbproxy_link_info_by_ptmsi(peer, bss_ptmsi)) - bss_ptmsi = GSM_RESERVED_TMSI; - } while (bss_ptmsi == GSM_RESERVED_TMSI && max_retries--); - } - - if (bss_ptmsi == GSM_RESERVED_TMSI) - LOGP(DGPRS, LOGL_ERROR, "Failed to allocate a BSS P-TMSI\n"); - - return bss_ptmsi; -} - -uint32_t gbproxy_make_sgsn_tlli(struct gbproxy_peer *peer, - struct gbproxy_link_info *link_info, - uint32_t bss_tlli) -{ - uint32_t sgsn_tlli; - int max_retries = 23; - if (!peer->cfg->patch_ptmsi) { - sgsn_tlli = bss_tlli; - } else if (link_info->sgsn_tlli.ptmsi != GSM_RESERVED_TMSI && - gprs_tlli_type(bss_tlli) == TLLI_FOREIGN) { - sgsn_tlli = gprs_tmsi2tlli(link_info->sgsn_tlli.ptmsi, - TLLI_FOREIGN); - } else if (link_info->sgsn_tlli.ptmsi != GSM_RESERVED_TMSI && - gprs_tlli_type(bss_tlli) == TLLI_LOCAL) { - sgsn_tlli = gprs_tmsi2tlli(link_info->sgsn_tlli.ptmsi, - TLLI_LOCAL); - } else { - do { - /* create random TLLI, 0b01111xxx... */ - if (RAND_bytes((uint8_t *) &sgsn_tlli, sizeof(sgsn_tlli)) != 1) { - sgsn_tlli = 0; - break; - } - - sgsn_tlli = (sgsn_tlli & 0x7fffffff) | 0x78000000; - - if (gbproxy_link_info_by_any_sgsn_tlli(peer, sgsn_tlli)) - sgsn_tlli = 0; - } while (!sgsn_tlli && max_retries--); - } - - if (!sgsn_tlli) - LOGP(DGPRS, LOGL_ERROR, "Failed to allocate an SGSN TLLI\n"); - - return sgsn_tlli; -} - -void gbproxy_reset_link(struct gbproxy_link_info *link_info) -{ - gbproxy_reset_imsi_acquisition(link_info); -} - -/* Returns != 0 iff IMSI acquisition was in progress */ -static int gbproxy_restart_imsi_acquisition(struct gbproxy_link_info* link_info) -{ - int in_progress = 0; - if (!link_info) - return 0; - - if (link_info->imsi_acq_pending) - in_progress = 1; - - gbproxy_link_info_discard_messages(link_info); - link_info->imsi_acq_pending = 0; - - return in_progress; -} - -static void gbproxy_reset_imsi_acquisition(struct gbproxy_link_info* link_info) -{ - gbproxy_restart_imsi_acquisition(link_info); - link_info->vu_gen_tx_bss = GBPROXY_INIT_VU_GEN_TX; -} - -static int gbproxy_flush_stored_messages(struct gbproxy_peer *peer, - struct msgb *msg, - time_t now, - struct gbproxy_link_info* link_info, - struct gprs_gb_parse_context *parse_ctx) -{ - int rc; - struct msgb *stored_msg; - /* Got identity response with IMSI, assuming the request had - * been generated by the gbproxy */ - - LOGP(DLLC, LOGL_DEBUG, - "NSEI=%d(BSS) IMSI acquisition succeeded, " - "flushing stored messages\n", - msgb_nsei(msg)); - - /* Patch and flush stored messages towards the SGSN */ - while ((stored_msg = msgb_dequeue(&link_info->stored_msgs))) { - struct gprs_gb_parse_context tmp_parse_ctx = {0}; - tmp_parse_ctx.to_bss = 0; - tmp_parse_ctx.peer_nsei = msgb_nsei(stored_msg); - int len_change = 0; - - gprs_gb_parse_bssgp(msgb_bssgph(stored_msg), - msgb_bssgp_len(stored_msg), - &tmp_parse_ctx); - gbproxy_patch_bssgp(msg, msgb_bssgph(stored_msg), - msgb_bssgp_len(stored_msg), - peer, link_info, &len_change, - &tmp_parse_ctx); - - rc = gbproxy_update_link_state_after(peer, link_info, now, - &tmp_parse_ctx); - if (rc == 1) { - LOGP(DLLC, LOGL_NOTICE, "link_info deleted while flushing stored messages\n"); - msgb_free(stored_msg); - return -1; - } - - rc = gbprox_relay2sgsn(peer->cfg, stored_msg, - msgb_bvci(msg), link_info->sgsn_nsei); - - if (rc < 0) - LOGP(DLLC, LOGL_ERROR, - "NSEI=%d(BSS) failed to send stored message " - "(%s)\n", - msgb_nsei(msg), - parse_ctx->llc_msg_name ? - parse_ctx->llc_msg_name : "BSSGP"); - msgb_free(stored_msg); - } - - return 0; -} - -static int gbproxy_gsm48_to_peer(struct gbproxy_peer *peer, - struct gbproxy_link_info* link_info, - uint16_t bvci, - struct msgb *msg /* Takes msg ownership */) -{ - int rc; - - /* Workaround to avoid N(U) collisions and to enable a restart - * of the IMSI acquisition procedure. This will work unless the - * SGSN has an initial V(UT) within [256-32, 256+n_retries] - * (see GSM 04.64, 8.4.2). */ - gprs_push_llc_ui(msg, 0, GPRS_SAPI_GMM, link_info->vu_gen_tx_bss); - link_info->vu_gen_tx_bss = (link_info->vu_gen_tx_bss + 1) % 512; - - gprs_push_bssgp_dl_unitdata(msg, link_info->tlli.current); - rc = gbprox_relay2peer(msg, peer, bvci); - msgb_free(msg); - return rc; -} - -static void gbproxy_acquire_imsi(struct gbproxy_peer *peer, - struct gbproxy_link_info* link_info, - uint16_t bvci) -{ - struct msgb *idreq_msg; - - /* Send IDENT REQ */ - idreq_msg = gsm48_msgb_alloc_name("GSM 04.08 ACQ IMSI"); - gprs_put_identity_req(idreq_msg, GSM_MI_TYPE_IMSI); - gbproxy_gsm48_to_peer(peer, link_info, bvci, idreq_msg); -} - -static void gbproxy_tx_detach_acc(struct gbproxy_peer *peer, - struct gbproxy_link_info* link_info, - uint16_t bvci) -{ - struct msgb *detacc_msg; - - /* Send DETACH ACC */ - detacc_msg = gsm48_msgb_alloc_name("GSM 04.08 DET ACC"); - gprs_put_mo_detach_acc(detacc_msg); - gbproxy_gsm48_to_peer(peer, link_info, bvci, detacc_msg); -} - -/* Return != 0 iff msg still needs to be processed */ -static int gbproxy_imsi_acquisition(struct gbproxy_peer *peer, - struct msgb *msg, - time_t now, - struct gbproxy_link_info* link_info, - struct gprs_gb_parse_context *parse_ctx) -{ - struct msgb *stored_msg; - - if (!link_info) - return 1; - - if (!link_info->imsi_acq_pending && link_info->imsi_len > 0) - return 1; - - if (parse_ctx->g48_hdr) - switch (parse_ctx->g48_hdr->msg_type) - { - case GSM48_MT_GMM_RA_UPD_REQ: - case GSM48_MT_GMM_ATTACH_REQ: - if (gbproxy_restart_imsi_acquisition(link_info)) { - LOGP(DLLC, LOGL_INFO, - "NSEI=%d(BSS) IMSI acquisition was in progress " - "when receiving an %s.\n", - msgb_nsei(msg), parse_ctx->llc_msg_name); - } - break; - case GSM48_MT_GMM_DETACH_REQ: - /* Nothing has been sent to the SGSN yet */ - if (link_info->imsi_acq_pending) { - LOGP(DLLC, LOGL_INFO, - "NSEI=%d(BSS) IMSI acquisition was in progress " - "when receiving a DETACH_REQ.\n", - msgb_nsei(msg)); - } - if (!parse_ctx->invalidate_tlli) { - LOGP(DLLC, LOGL_INFO, - "NSEI=%d(BSS) IMSI not yet acquired, " - "faking a DETACH_ACC.\n", - msgb_nsei(msg)); - gbproxy_tx_detach_acc(peer, link_info, msgb_bvci(msg)); - parse_ctx->invalidate_tlli = 1; - } - gbproxy_reset_imsi_acquisition(link_info); - gbproxy_update_link_state_after(peer, link_info, now, - parse_ctx); - return 0; - } - - if (link_info->imsi_acq_pending && link_info->imsi_len > 0) { - int is_ident_resp = - parse_ctx->g48_hdr && - gsm48_hdr_pdisc(parse_ctx->g48_hdr) == GSM48_PDISC_MM_GPRS && - gsm48_hdr_msg_type(parse_ctx->g48_hdr) == GSM48_MT_GMM_ID_RESP; - - /* The IMSI is now available. If flushing the messages fails, - * then link_info has been deleted and we should return - * immediately. */ - if (gbproxy_flush_stored_messages(peer, msg, now, link_info, - parse_ctx) < 0) - return 0; - - gbproxy_reset_imsi_acquisition(link_info); - - /* This message is most probably the response to the ident - * request sent by gbproxy_acquire_imsi(). Don't forward it to - * the SGSN. */ - return !is_ident_resp; - } - - /* The message cannot be processed since the IMSI is still missing */ - - /* Enqueue unpatched messages */ - LOGP(DLLC, LOGL_INFO, - "NSEI=%d(BSS) IMSI acquisition in progress, " - "storing message (%s)\n", - msgb_nsei(msg), - parse_ctx->llc_msg_name ? parse_ctx->llc_msg_name : "BSSGP"); - - stored_msg = gprs_msgb_copy(msg, "process_bssgp_ul"); - msgb_enqueue(&link_info->stored_msgs, stored_msg); - - if (!link_info->imsi_acq_pending) { - LOGP(DLLC, LOGL_INFO, - "NSEI=%d(BSS) IMSI is required but not available, " - "initiating identification procedure (%s)\n", - msgb_nsei(msg), - parse_ctx->llc_msg_name ? parse_ctx->llc_msg_name : "BSSGP"); - - gbproxy_acquire_imsi(peer, link_info, msgb_bvci(msg)); - - /* There is no explicit retransmission handling, the - * implementation relies on the MS doing proper retransmissions - * of the triggering message instead */ - - link_info->imsi_acq_pending = 1; - } - - return 0; -} - -struct gbproxy_peer *gbproxy_find_peer(struct gbproxy_config *cfg, - struct msgb *msg, - struct gprs_gb_parse_context *parse_ctx) -{ - struct gbproxy_peer *peer = NULL; - - if (msgb_bvci(msg) >= 2) - peer = gbproxy_peer_by_bvci(cfg, msgb_bvci(msg)); - - if (!peer && !parse_ctx->to_bss) - peer = gbproxy_peer_by_nsei(cfg, msgb_nsei(msg)); - - if (!peer) - peer = gbproxy_peer_by_bssgp_tlv(cfg, &parse_ctx->bssgp_tp); - - if (!peer) { - LOGP(DLLC, LOGL_INFO, - "NSEI=%d(%s) patching: didn't find peer for message, " - "PDU %d\n", - msgb_nsei(msg), parse_ctx->to_bss ? "BSS" : "SGSN", - parse_ctx->pdu_type); - /* Increment counter */ - rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_PATCH_PEER_ERR]); - } - return peer; -} - -/* patch BSSGP message */ -static int gbprox_process_bssgp_ul(struct gbproxy_config *cfg, - struct msgb *msg, - struct gbproxy_peer *peer) -{ - struct gprs_gb_parse_context parse_ctx = {0}; - int rc; - int len_change = 0; - time_t now; - struct timespec ts = {0,}; - struct gbproxy_link_info *link_info = NULL; - uint32_t sgsn_nsei = cfg->nsip_sgsn_nsei; - - if (!cfg->core_mcc && !cfg->core_mnc && !cfg->core_apn && - !cfg->acquire_imsi && !cfg->patch_ptmsi && !cfg->route_to_sgsn2) - return 1; - - parse_ctx.to_bss = 0; - parse_ctx.peer_nsei = msgb_nsei(msg); - - /* Parse BSSGP/LLC */ - rc = gprs_gb_parse_bssgp(msgb_bssgph(msg), msgb_bssgp_len(msg), - &parse_ctx); - - if (!rc && !parse_ctx.need_decryption) { - LOGP(DGPRS, LOGL_ERROR, - "NSEI=%u(BSS) patching: failed to parse invalid %s message\n", - msgb_nsei(msg), gprs_gb_message_name(&parse_ctx, "NS_UNITDATA")); - gprs_gb_log_parse_context(LOGL_NOTICE, &parse_ctx, "NS_UNITDATA"); - LOGP(DGPRS, LOGL_NOTICE, - "NSEI=%u(BSS) invalid message was: %s\n", - msgb_nsei(msg), msgb_hexdump(msg)); - return 0; - } - - /* Get peer */ - if (!peer) - peer = gbproxy_find_peer(cfg, msg, &parse_ctx); - - if (!peer) - return 0; - - - clock_gettime(CLOCK_MONOTONIC, &ts); - now = ts.tv_sec; - - gbprox_update_current_raid(parse_ctx.bssgp_raid_enc, peer, - parse_ctx.llc_msg_name); - - gprs_gb_log_parse_context(LOGL_DEBUG, &parse_ctx, "NS_UNITDATA"); - - link_info = gbproxy_update_link_state_ul(peer, now, &parse_ctx); - - if (parse_ctx.g48_hdr) { - switch (parse_ctx.g48_hdr->msg_type) { - case GSM48_MT_GMM_ATTACH_REQ: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_ATTACH_REQS]); - break; - case GSM48_MT_GMM_DETACH_REQ: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_DETACH_REQS]); - break; - case GSM48_MT_GMM_ATTACH_COMPL: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_ATTACH_COMPLS]); - break; - case GSM48_MT_GMM_RA_UPD_REQ: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_RA_UPD_REQS]); - break; - case GSM48_MT_GMM_RA_UPD_COMPL: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_RA_UPD_COMPLS]); - break; - case GSM48_MT_GMM_STATUS: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_GMM_STATUS_BSS]); - break; - case GSM48_MT_GSM_ACT_PDP_REQ: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_PDP_ACT_REQS]); - break; - case GSM48_MT_GSM_DEACT_PDP_REQ: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_PDP_DEACT_REQS]); - break; - - default: - break; - } - } - - if (link_info && cfg->route_to_sgsn2) { - if (cfg->acquire_imsi && link_info->imsi_len == 0) - sgsn_nsei = 0xffff; - else if (gbproxy_imsi_matches(cfg, GBPROX_MATCH_ROUTING, - link_info)) - sgsn_nsei = cfg->nsip_sgsn2_nsei; - } - - if (link_info) - link_info->sgsn_nsei = sgsn_nsei; - - /* Handle IMSI acquisition */ - if (cfg->acquire_imsi) { - rc = gbproxy_imsi_acquisition(peer, msg, now, link_info, - &parse_ctx); - if (rc <= 0) - return rc; - } - - gbproxy_patch_bssgp(msg, msgb_bssgph(msg), msgb_bssgp_len(msg), - peer, link_info, &len_change, &parse_ctx); - - gbproxy_update_link_state_after(peer, link_info, now, &parse_ctx); - - if (sgsn_nsei != cfg->nsip_sgsn_nsei) { - /* Send message directly to the selected SGSN */ - rc = gbprox_relay2sgsn(cfg, msg, msgb_bvci(msg), sgsn_nsei); - /* Don't let the calling code handle the transmission */ - return 0; - } - - return 1; -} - -/* patch BSSGP message to use core_mcc/mnc on the SGSN side */ -static void gbprox_process_bssgp_dl(struct gbproxy_config *cfg, - struct msgb *msg, - struct gbproxy_peer *peer) -{ - struct gprs_gb_parse_context parse_ctx = {0}; - int rc; - int len_change = 0; - time_t now; - struct timespec ts = {0,}; - struct gbproxy_link_info *link_info = NULL; - - if (!cfg->core_mcc && !cfg->core_mnc && !cfg->core_apn && - !cfg->acquire_imsi && !cfg->patch_ptmsi && !cfg->route_to_sgsn2) - return; - - parse_ctx.to_bss = 1; - parse_ctx.peer_nsei = msgb_nsei(msg); - - rc = gprs_gb_parse_bssgp(msgb_bssgph(msg), msgb_bssgp_len(msg), - &parse_ctx); - - if (!rc && !parse_ctx.need_decryption) { - LOGP(DGPRS, LOGL_ERROR, - "NSEI=%u(SGSN) patching: failed to parse invalid %s message\n", - msgb_nsei(msg), gprs_gb_message_name(&parse_ctx, "NS_UNITDATA")); - gprs_gb_log_parse_context(LOGL_NOTICE, &parse_ctx, "NS_UNITDATA"); - LOGP(DGPRS, LOGL_NOTICE, - "NSEI=%u(SGSN) invalid message was: %s\n", - msgb_nsei(msg), msgb_hexdump(msg)); - return; - } - - /* Get peer */ - if (!peer) - peer = gbproxy_find_peer(cfg, msg, &parse_ctx); - - if (!peer) - return; - - clock_gettime(CLOCK_MONOTONIC, &ts); - now = ts.tv_sec; - - if (parse_ctx.g48_hdr) { - switch (parse_ctx.g48_hdr->msg_type) { - case GSM48_MT_GMM_ATTACH_ACK: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_ATTACH_ACKS]); - break; - case GSM48_MT_GMM_ATTACH_REJ: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_ATTACH_REJS]); - break; - case GSM48_MT_GMM_DETACH_ACK: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_DETACH_ACKS]); - break; - case GSM48_MT_GMM_RA_UPD_ACK: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_RA_UPD_ACKS]); - break; - case GSM48_MT_GMM_RA_UPD_REJ: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_RA_UPD_REJS]); - break; - case GSM48_MT_GMM_STATUS: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_GMM_STATUS_SGSN]); - break; - case GSM48_MT_GSM_ACT_PDP_ACK: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_PDP_ACT_ACKS]); - break; - case GSM48_MT_GSM_ACT_PDP_REJ: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_PDP_ACT_REJS]); - break; - case GSM48_MT_GSM_DEACT_PDP_ACK: - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_PDP_DEACT_ACKS]); - break; - - default: - break; - } - } - - gprs_gb_log_parse_context(LOGL_DEBUG, &parse_ctx, "NS_UNITDATA"); - - link_info = gbproxy_update_link_state_dl(peer, now, &parse_ctx); - - gbproxy_patch_bssgp(msg, msgb_bssgph(msg), msgb_bssgp_len(msg), - peer, link_info, &len_change, &parse_ctx); - - gbproxy_update_link_state_after(peer, link_info, now, &parse_ctx); - - return; -} - -/* feed a message down the NS-VC associated with the specified peer */ -static int gbprox_relay2sgsn(struct gbproxy_config *cfg, struct msgb *old_msg, - uint16_t ns_bvci, uint16_t sgsn_nsei) -{ - /* create a copy of the message so the old one can - * be free()d safely when we return from gbprox_rcvmsg() */ - struct msgb *msg = gprs_msgb_copy(old_msg, "msgb_relay2sgsn"); - int rc; - - DEBUGP(DGPRS, "NSEI=%u proxying BTS->SGSN (NS_BVCI=%u, NSEI=%u)\n", - msgb_nsei(msg), ns_bvci, sgsn_nsei); - - msgb_bvci(msg) = ns_bvci; - msgb_nsei(msg) = sgsn_nsei; - - strip_ns_hdr(msg); - - rc = gprs_ns_sendmsg(bssgp_nsi, msg); - if (rc < 0) - rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_TX_ERR_SGSN]); - - return rc; -} - -/* feed a message down the NS-VC associated with the specified peer */ -static int gbprox_relay2peer(struct msgb *old_msg, struct gbproxy_peer *peer, - uint16_t ns_bvci) -{ - /* create a copy of the message so the old one can - * be free()d safely when we return from gbprox_rcvmsg() */ - struct msgb *msg = gprs_msgb_copy(old_msg, "msgb_relay2peer"); - int rc; - - DEBUGP(DGPRS, "NSEI=%u proxying SGSN->BSS (NS_BVCI=%u, NSEI=%u)\n", - msgb_nsei(msg), ns_bvci, peer->nsei); - - msgb_bvci(msg) = ns_bvci; - msgb_nsei(msg) = peer->nsei; - - /* Strip the old NS header, it will be replaced with a new one */ - strip_ns_hdr(msg); - - rc = gprs_ns_sendmsg(bssgp_nsi, msg); - if (rc < 0) - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_TX_ERR]); - - return rc; -} - -static int block_unblock_peer(struct gbproxy_config *cfg, uint16_t ptp_bvci, uint8_t pdu_type) -{ - struct gbproxy_peer *peer; - - peer = gbproxy_peer_by_bvci(cfg, ptp_bvci); - if (!peer) { - LOGP(DGPRS, LOGL_ERROR, "BVCI=%u: Cannot find BSS\n", - ptp_bvci); - rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_BVCI]); - return -ENOENT; - } - - switch (pdu_type) { - case BSSGP_PDUT_BVC_BLOCK_ACK: - peer->blocked = 1; - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_BLOCKED]); - break; - case BSSGP_PDUT_BVC_UNBLOCK_ACK: - peer->blocked = 0; - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_UNBLOCKED]); - break; - default: - break; - } - return 0; -} - -/* Send a message to a peer identified by ptp_bvci but using ns_bvci - * in the NS hdr */ -static int gbprox_relay2bvci(struct gbproxy_config *cfg, struct msgb *msg, uint16_t ptp_bvci, - uint16_t ns_bvci) -{ - struct gbproxy_peer *peer; - - peer = gbproxy_peer_by_bvci(cfg, ptp_bvci); - if (!peer) { - LOGP(DGPRS, LOGL_ERROR, "BVCI=%u: Cannot find BSS\n", - ptp_bvci); - rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_BVCI]); - return -ENOENT; - } - - return gbprox_relay2peer(msg, peer, ns_bvci); -} - -int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) -{ - return 0; -} - -/* Receive an incoming PTP message from a BSS-side NS-VC */ -static int gbprox_rx_ptp_from_bss(struct gbproxy_config *cfg, - struct msgb *msg, uint16_t nsei, - uint16_t nsvci, uint16_t ns_bvci) -{ - struct gbproxy_peer *peer; - struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); - uint8_t pdu_type = bgph->pdu_type; - int rc; - - peer = gbproxy_peer_by_bvci(cfg, ns_bvci); - if (!peer) { - LOGP(DGPRS, LOGL_NOTICE, "Didn't find peer for " - "BVCI=%u for PTP message from NSVC=%u/NSEI=%u (BSS), " - "discarding message\n", - ns_bvci, nsvci, nsei); - return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, - &ns_bvci, msg); - } - - check_peer_nsei(peer, nsei); - - rc = gbprox_process_bssgp_ul(cfg, msg, peer); - if (!rc) - return 0; - - switch (pdu_type) { - case BSSGP_PDUT_FLOW_CONTROL_BVC: - if (!cfg->route_to_sgsn2) - break; - - /* Send a copy to the secondary SGSN */ - gbprox_relay2sgsn(cfg, msg, ns_bvci, cfg->nsip_sgsn2_nsei); - break; - default: - break; - } - - - return gbprox_relay2sgsn(cfg, msg, ns_bvci, cfg->nsip_sgsn_nsei); -} - -/* Receive an incoming PTP message from a SGSN-side NS-VC */ -static int gbprox_rx_ptp_from_sgsn(struct gbproxy_config *cfg, - struct msgb *msg, uint16_t nsei, - uint16_t nsvci, uint16_t ns_bvci) -{ - struct gbproxy_peer *peer; - struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); - uint8_t pdu_type = bgph->pdu_type; - - peer = gbproxy_peer_by_bvci(cfg, ns_bvci); - - /* Send status messages before patching */ - - if (!peer) { - LOGP(DGPRS, LOGL_INFO, "Didn't find peer for " - "BVCI=%u for message from NSVC=%u/NSEI=%u (SGSN)\n", - ns_bvci, nsvci, nsei); - rate_ctr_inc(&cfg->ctrg-> - ctr[GBPROX_GLOB_CTR_INV_BVCI]); - return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, - &ns_bvci, msg); - } - - if (peer->blocked) { - LOGP(DGPRS, LOGL_NOTICE, "Dropping PDU for " - "blocked BVCI=%u via NSVC=%u/NSEI=%u\n", - ns_bvci, nsvci, nsei); - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_DROPPED]); - return bssgp_tx_status(BSSGP_CAUSE_BVCI_BLOCKED, &ns_bvci, msg); - } - - switch (pdu_type) { - case BSSGP_PDUT_FLOW_CONTROL_BVC_ACK: - case BSSGP_PDUT_BVC_BLOCK_ACK: - case BSSGP_PDUT_BVC_UNBLOCK_ACK: - if (cfg->route_to_sgsn2 && nsei == cfg->nsip_sgsn2_nsei) - /* Hide ACKs from the secondary SGSN, the primary SGSN - * is responsible to send them. */ - return 0; - break; - default: - break; - } - - /* Optionally patch the message */ - gbprox_process_bssgp_dl(cfg, msg, peer); - - return gbprox_relay2peer(msg, peer, ns_bvci); -} - -/* Receive an incoming signalling message from a BSS-side NS-VC */ -static int gbprox_rx_sig_from_bss(struct gbproxy_config *cfg, - struct msgb *msg, uint16_t nsei, - uint16_t ns_bvci) -{ - struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); - struct tlv_parsed tp; - uint8_t pdu_type = bgph->pdu_type; - int data_len = msgb_bssgp_len(msg) - sizeof(*bgph); - struct gbproxy_peer *from_peer = NULL; - struct gprs_ra_id raid; - int copy_to_sgsn2 = 0; - int rc; - - if (ns_bvci != 0 && ns_bvci != 1) { - LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u BVCI=%u is not signalling\n", - nsei, ns_bvci); - return -EINVAL; - } - - /* we actually should never see those two for BVCI == 0, but double-check - * just to make sure */ - if (pdu_type == BSSGP_PDUT_UL_UNITDATA || - pdu_type == BSSGP_PDUT_DL_UNITDATA) { - LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u UNITDATA not allowed in " - "signalling\n", nsei); - return -EINVAL; - } - - bssgp_tlv_parse(&tp, bgph->data, data_len); - - switch (pdu_type) { - case BSSGP_PDUT_SUSPEND: - case BSSGP_PDUT_RESUME: - /* We implement RAI snooping during SUSPEND/RESUME, since it - * establishes a relationsip between BVCI/peer and the routeing - * area identification. The snooped information is then used - * for routing the {SUSPEND,RESUME}_[N]ACK back to the correct - * BSSGP */ - if (!TLVP_PRESENT(&tp, BSSGP_IE_ROUTEING_AREA)) - goto err_mand_ie; - from_peer = gbproxy_peer_by_nsei(cfg, nsei); - if (!from_peer) - goto err_no_peer; - memcpy(from_peer->ra, TLVP_VAL(&tp, BSSGP_IE_ROUTEING_AREA), - sizeof(from_peer->ra)); - gsm48_parse_ra(&raid, from_peer->ra); - LOGP(DGPRS, LOGL_INFO, "NSEI=%u BSSGP SUSPEND/RESUME " - "RAI snooping: RAI %u-%u-%u-%u behind BVCI=%u\n", - nsei, raid.mcc, raid.mnc, raid.lac, - raid.rac , from_peer->bvci); - /* FIXME: This only supports one BSS per RA */ - break; - case BSSGP_PDUT_BVC_RESET: - /* If we receive a BVC reset on the signalling endpoint, we - * don't want the SGSN to reset, as the signalling endpoint - * is common for all point-to-point BVCs (and thus all BTS) */ - if (TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) { - uint16_t bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); - LOGP(DGPRS, LOGL_INFO, "NSEI=%u Rx BVC RESET (BVCI=%u)\n", - nsei, bvci); - if (bvci == 0) { - /* FIXME: only do this if SGSN is alive! */ - LOGP(DGPRS, LOGL_INFO, "NSEI=%u Tx fake " - "BVC RESET ACK of BVCI=0\n", nsei); - return bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_RESET_ACK, - nsei, 0, ns_bvci); - } - from_peer = gbproxy_peer_by_bvci(cfg, bvci); - if (!from_peer) { - /* if a PTP-BVC is reset, and we don't know that - * PTP-BVCI yet, we should allocate a new peer */ - LOGP(DGPRS, LOGL_INFO, "Allocationg new peer for " - "BVCI=%u via NSEI=%u\n", bvci, nsei); - from_peer = gbproxy_peer_alloc(cfg, bvci); - from_peer->nsei = nsei; - } - - if (!check_peer_nsei(from_peer, nsei)) - from_peer->nsei = nsei; - - if (TLVP_PRESENT(&tp, BSSGP_IE_CELL_ID)) { - struct gprs_ra_id raid; - /* We have a Cell Identifier present in this - * PDU, this means we can extend our local - * state information about this particular cell - * */ - memcpy(from_peer->ra, - TLVP_VAL(&tp, BSSGP_IE_CELL_ID), - sizeof(from_peer->ra)); - gsm48_parse_ra(&raid, from_peer->ra); - LOGP(DGPRS, LOGL_INFO, "NSEI=%u/BVCI=%u " - "Cell ID %u-%u-%u-%u\n", nsei, - bvci, raid.mcc, raid.mnc, raid.lac, - raid.rac); - } - if (cfg->route_to_sgsn2) - copy_to_sgsn2 = 1; - } - break; - } - - /* Normally, we can simply pass on all signalling messages from BSS to - * SGSN */ - rc = gbprox_process_bssgp_ul(cfg, msg, from_peer); - if (!rc) - return 0; - - if (copy_to_sgsn2) - gbprox_relay2sgsn(cfg, msg, ns_bvci, cfg->nsip_sgsn2_nsei); - - return gbprox_relay2sgsn(cfg, msg, ns_bvci, cfg->nsip_sgsn_nsei); -err_no_peer: - LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(BSS) cannot find peer based on NSEI\n", - nsei); - rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_NSEI]); - return bssgp_tx_status(BSSGP_CAUSE_INV_MAND_INF, NULL, msg); -err_mand_ie: - LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(BSS) missing mandatory RA IE\n", - nsei); - rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_PROTO_ERR_BSS]); - return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); -} - -/* Receive paging request from SGSN, we need to relay to proper BSS */ -static int gbprox_rx_paging(struct gbproxy_config *cfg, struct msgb *msg, struct tlv_parsed *tp, - uint32_t nsei, uint16_t ns_bvci) -{ - struct gbproxy_peer *peer = NULL; - int errctr = GBPROX_GLOB_CTR_PROTO_ERR_SGSN; - - LOGP(DGPRS, LOGL_INFO, "NSEI=%u(SGSN) BSSGP PAGING ", - nsei); - if (TLVP_PRESENT(tp, BSSGP_IE_BVCI)) { - uint16_t bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); - LOGPC(DGPRS, LOGL_INFO, "routing by BVCI to peer BVCI=%u\n", - bvci); - errctr = GBPROX_GLOB_CTR_OTHER_ERR; - } else if (TLVP_PRESENT(tp, BSSGP_IE_ROUTEING_AREA)) { - peer = gbproxy_peer_by_rai(cfg, TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA)); - LOGPC(DGPRS, LOGL_INFO, "routing by RAI to peer BVCI=%u\n", - peer ? peer->bvci : -1); - errctr = GBPROX_GLOB_CTR_INV_RAI; - } else if (TLVP_PRESENT(tp, BSSGP_IE_LOCATION_AREA)) { - peer = gbproxy_peer_by_lai(cfg, TLVP_VAL(tp, BSSGP_IE_LOCATION_AREA)); - LOGPC(DGPRS, LOGL_INFO, "routing by LAI to peer BVCI=%u\n", - peer ? peer->bvci : -1); - errctr = GBPROX_GLOB_CTR_INV_LAI; - } else - LOGPC(DGPRS, LOGL_INFO, "\n"); - - if (!peer) { - LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) BSSGP PAGING: " - "unable to route, missing IE\n", nsei); - rate_ctr_inc(&cfg->ctrg->ctr[errctr]); - return -EINVAL; - } - return gbprox_relay2peer(msg, peer, ns_bvci); -} - -/* Receive an incoming BVC-RESET message from the SGSN */ -static int rx_reset_from_sgsn(struct gbproxy_config *cfg, - struct msgb *orig_msg, - struct msgb *msg, struct tlv_parsed *tp, - uint32_t nsei, uint16_t ns_bvci) -{ - struct gbproxy_peer *peer; - uint16_t ptp_bvci; - - if (!TLVP_PRESENT(tp, BSSGP_IE_BVCI)) { - rate_ctr_inc(&cfg->ctrg-> - ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); - return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, - NULL, orig_msg); - } - ptp_bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); - - if (ptp_bvci >= 2) { - /* A reset for a PTP BVC was received, forward it to its - * respective peer */ - peer = gbproxy_peer_by_bvci(cfg, ptp_bvci); - if (!peer) { - LOGP(DGPRS, LOGL_ERROR, "NSEI=%u BVCI=%u: Cannot find BSS\n", - nsei, ptp_bvci); - rate_ctr_inc(&cfg->ctrg-> - ctr[GBPROX_GLOB_CTR_INV_BVCI]); - return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, - &ptp_bvci, orig_msg); - } - return gbprox_relay2peer(msg, peer, ns_bvci); - } - - /* A reset for the Signalling entity has been received - * from the SGSN. As the signalling BVCI is shared - * among all the BSS's that we multiplex, it needs to - * be relayed */ - llist_for_each_entry(peer, &cfg->bts_peers, list) - gbprox_relay2peer(msg, peer, ns_bvci); - - return 0; -} - -/* Receive an incoming signalling message from the SGSN-side NS-VC */ -static int gbprox_rx_sig_from_sgsn(struct gbproxy_config *cfg, - struct msgb *orig_msg, uint32_t nsei, - uint16_t ns_bvci) -{ - struct bssgp_normal_hdr *bgph = - (struct bssgp_normal_hdr *) msgb_bssgph(orig_msg); - struct tlv_parsed tp; - uint8_t pdu_type = bgph->pdu_type; - int data_len; - struct gbproxy_peer *peer; - uint16_t bvci; - struct msgb *msg; - int rc = 0; - int cause; - - if (ns_bvci != 0 && ns_bvci != 1) { - LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) BVCI=%u is not " - "signalling\n", nsei, ns_bvci); - /* FIXME: Send proper error message */ - return -EINVAL; - } - - /* we actually should never see those two for BVCI == 0, but double-check - * just to make sure */ - if (pdu_type == BSSGP_PDUT_UL_UNITDATA || - pdu_type == BSSGP_PDUT_DL_UNITDATA) { - LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) UNITDATA not allowed in " - "signalling\n", nsei); - return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, orig_msg); - } - - msg = gprs_msgb_copy(orig_msg, "rx_sig_from_sgsn"); - gbprox_process_bssgp_dl(cfg, msg, NULL); - /* Update message info */ - bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); - data_len = msgb_bssgp_len(orig_msg) - sizeof(*bgph); - rc = bssgp_tlv_parse(&tp, bgph->data, data_len); - - switch (pdu_type) { - case BSSGP_PDUT_BVC_RESET: - rc = rx_reset_from_sgsn(cfg, msg, orig_msg, &tp, nsei, ns_bvci); - break; - case BSSGP_PDUT_BVC_RESET_ACK: - if (cfg->route_to_sgsn2 && nsei == cfg->nsip_sgsn2_nsei) - break; - /* fall through */ - case BSSGP_PDUT_FLUSH_LL: - /* simple case: BVCI IE is mandatory */ - if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) - goto err_mand_ie; - bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); - rc = gbprox_relay2bvci(cfg, msg, bvci, ns_bvci); - break; - case BSSGP_PDUT_PAGING_PS: - case BSSGP_PDUT_PAGING_CS: - /* process the paging request (LAI/RAI lookup) */ - rc = gbprox_rx_paging(cfg, msg, &tp, nsei, ns_bvci); - break; - case BSSGP_PDUT_STATUS: - /* Some exception has occurred */ - LOGP(DGPRS, LOGL_NOTICE, - "NSEI=%u(SGSN) BSSGP STATUS ", nsei); - if (!TLVP_PRESENT(&tp, BSSGP_IE_CAUSE)) { - LOGPC(DGPRS, LOGL_NOTICE, "\n"); - goto err_mand_ie; - } - cause = *TLVP_VAL(&tp, BSSGP_IE_CAUSE); - LOGPC(DGPRS, LOGL_NOTICE, - "cause=0x%02x(%s) ", *TLVP_VAL(&tp, BSSGP_IE_CAUSE), - bssgp_cause_str(cause)); - if (TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) { - bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); - LOGPC(DGPRS, LOGL_NOTICE, "BVCI=%u\n", bvci); - - if (cause == BSSGP_CAUSE_UNKNOWN_BVCI) - rc = gbprox_relay2bvci(cfg, msg, bvci, ns_bvci); - } else - LOGPC(DGPRS, LOGL_NOTICE, "\n"); - break; - /* those only exist in the SGSN -> BSS direction */ - case BSSGP_PDUT_SUSPEND_ACK: - case BSSGP_PDUT_SUSPEND_NACK: - case BSSGP_PDUT_RESUME_ACK: - case BSSGP_PDUT_RESUME_NACK: - /* RAI IE is mandatory */ - if (!TLVP_PRESENT(&tp, BSSGP_IE_ROUTEING_AREA)) - goto err_mand_ie; - peer = gbproxy_peer_by_rai(cfg, TLVP_VAL(&tp, BSSGP_IE_ROUTEING_AREA)); - if (!peer) - goto err_no_peer; - rc = gbprox_relay2peer(msg, peer, ns_bvci); - break; - case BSSGP_PDUT_BVC_BLOCK_ACK: - case BSSGP_PDUT_BVC_UNBLOCK_ACK: - if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) - goto err_mand_ie; - bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); - if (bvci == 0) { - LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) BSSGP " - "%sBLOCK_ACK for signalling BVCI ?!?\n", nsei, - pdu_type == BSSGP_PDUT_BVC_UNBLOCK_ACK ? "UN":""); - /* should we send STATUS ? */ - rate_ctr_inc(&cfg->ctrg-> - ctr[GBPROX_GLOB_CTR_INV_BVCI]); - } else { - /* Mark BVC as (un)blocked */ - block_unblock_peer(cfg, bvci, pdu_type); - } - rc = gbprox_relay2bvci(cfg, msg, bvci, ns_bvci); - break; - case BSSGP_PDUT_SGSN_INVOKE_TRACE: - LOGP(DGPRS, LOGL_ERROR, - "NSEI=%u(SGSN) BSSGP INVOKE TRACE not supported\n",nsei); - rate_ctr_inc(&cfg->ctrg-> - ctr[GBPROX_GLOB_CTR_NOT_SUPPORTED_SGSN]); - rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, orig_msg); - break; - default: - LOGP(DGPRS, LOGL_NOTICE, "BSSGP PDU type %s not supported\n", bssgp_pdu_str(pdu_type)); - rate_ctr_inc(&cfg->ctrg-> - ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); - rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, orig_msg); - break; - } - - msgb_free(msg); - - return rc; -err_mand_ie: - LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) missing mandatory IE\n", - nsei); - rate_ctr_inc(&cfg->ctrg-> - ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); - msgb_free(msg); - return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, orig_msg); -err_no_peer: - LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) cannot find peer based on RAI\n", - nsei); - rate_ctr_inc(&cfg->ctrg-> ctr[GBPROX_GLOB_CTR_INV_RAI]); - msgb_free(msg); - return bssgp_tx_status(BSSGP_CAUSE_INV_MAND_INF, NULL, orig_msg); -} - -static int gbproxy_is_sgsn_nsei(struct gbproxy_config *cfg, uint16_t nsei) -{ - return nsei == cfg->nsip_sgsn_nsei || - (cfg->route_to_sgsn2 && nsei == cfg->nsip_sgsn2_nsei); -} - -/* Main input function for Gb proxy */ -int gbprox_rcvmsg(struct gbproxy_config *cfg, struct msgb *msg, uint16_t nsei, - uint16_t ns_bvci, uint16_t nsvci) -{ - int rc; - int remote_end_is_sgsn = gbproxy_is_sgsn_nsei(cfg, nsei); - - /* Only BVCI=0 messages need special treatment */ - if (ns_bvci == 0 || ns_bvci == 1) { - if (remote_end_is_sgsn) - rc = gbprox_rx_sig_from_sgsn(cfg, msg, nsei, ns_bvci); - else - rc = gbprox_rx_sig_from_bss(cfg, msg, nsei, ns_bvci); - } else { - /* All other BVCI are PTP */ - if (remote_end_is_sgsn) - rc = gbprox_rx_ptp_from_sgsn(cfg, msg, nsei, nsvci, - ns_bvci); - else - rc = gbprox_rx_ptp_from_bss(cfg, msg, nsei, nsvci, - ns_bvci); - } - - return rc; -} - -int gbprox_reset_persistent_nsvcs(struct gprs_ns_inst *nsi) -{ - struct gprs_nsvc *nsvc; - - llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) { - if (!nsvc->persistent) - continue; - gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION); - } - return 0; -} - -/* Signal handler for signals from NS layer */ -int gbprox_signal(unsigned int subsys, unsigned int signal, - void *handler_data, void *signal_data) -{ - struct gbproxy_config *cfg = handler_data; - struct ns_signal_data *nssd = signal_data; - struct gprs_nsvc *nsvc = nssd->nsvc; - struct gbproxy_peer *peer; - int remote_end_is_sgsn = gbproxy_is_sgsn_nsei(cfg, nsvc->nsei); - - if (subsys != SS_L_NS) - return 0; - - if (signal == S_NS_RESET && remote_end_is_sgsn) { - /* We have received a NS-RESET from the NSEI and NSVC - * of the SGSN. This might happen with SGSN that start - * their own NS-RESET procedure without waiting for our - * NS-RESET */ - nsvc->remote_end_is_sgsn = 1; - } - - if (signal == S_NS_ALIVE_EXP && nsvc->remote_end_is_sgsn) { - LOGP(DGPRS, LOGL_NOTICE, "Tns alive expired too often, " - "re-starting RESET procedure\n"); - rate_ctr_inc(&cfg->ctrg-> - ctr[GBPROX_GLOB_CTR_RESTART_RESET_SGSN]); - gprs_ns_nsip_connect(nsvc->nsi, &nsvc->ip.bts_addr, - nsvc->nsei, nsvc->nsvci); - } - - if (!nsvc->remote_end_is_sgsn) { - /* from BSS to SGSN */ - peer = gbproxy_peer_by_nsei(cfg, nsvc->nsei); - if (!peer) { - LOGP(DGPRS, LOGL_NOTICE, "signal '%s' for unknown peer NSEI=%u/NSVCI=%u\n", - get_value_string(gprs_ns_signal_ns_names, signal), nsvc->nsei, nsvc->nsvci); - return 0; - } - switch (signal) { - case S_NS_RESET: - case S_NS_BLOCK: - if (!peer->blocked) - break; - LOGP(DGPRS, LOGL_NOTICE, "Converting '%s' from NSEI=%u/NSVCI=%u into BSSGP_BVC_BLOCK to SGSN\n", - get_value_string(gprs_ns_signal_ns_names, signal), nsvc->nsei, nsvc->nsvci); - bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_BLOCK, nsvc->nsei, - peer->bvci, 0); - break; - } - } else { - /* Forward this message to all NS-VC to BSS */ - struct gprs_ns_inst *nsi = cfg->nsi; - struct gprs_nsvc *next_nsvc; - - llist_for_each_entry(next_nsvc, &nsi->gprs_nsvcs, list) { - if (next_nsvc->remote_end_is_sgsn) - continue; - - /* Note that the following does not start the full - * procedures including timer based retransmissions. */ - switch (signal) { - case S_NS_RESET: - gprs_ns_tx_reset(next_nsvc, nssd->cause); - break; - case S_NS_BLOCK: - gprs_ns_tx_block(next_nsvc, nssd->cause); - break; - case S_NS_UNBLOCK: - gprs_ns_tx_unblock(next_nsvc); - break; - } - } - } - return 0; -} - -void gbprox_reset(struct gbproxy_config *cfg) -{ - struct gbproxy_peer *peer, *tmp; - - llist_for_each_entry_safe(peer, tmp, &cfg->bts_peers, list) - gbproxy_peer_free(peer); - - rate_ctr_group_free(cfg->ctrg); - gbproxy_init_config(cfg); -} - -int gbproxy_init_config(struct gbproxy_config *cfg) -{ - struct timespec tp; - - INIT_LLIST_HEAD(&cfg->bts_peers); - cfg->ctrg = rate_ctr_group_alloc(tall_bsc_ctx, &global_ctrg_desc, 0); - if (!cfg->ctrg) { - LOGP(DGPRS, LOGL_ERROR, "Cannot allocate global counter group!\n"); - return -1; - } - clock_gettime(CLOCK_REALTIME, &tp); - - return 0; -} diff --git a/openbsc/src/gprs/gb_proxy_main.c b/openbsc/src/gprs/gb_proxy_main.c deleted file mode 100644 index caff27f6f..000000000 --- a/openbsc/src/gprs/gb_proxy_main.c +++ /dev/null @@ -1,317 +0,0 @@ -/* NS-over-IP proxy */ - -/* (C) 2010 by Harald Welte <laforge@gnumonks.org> - * (C) 2010 by On-Waves - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <unistd.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <getopt.h> -#include <errno.h> -#include <signal.h> -#include <sys/fcntl.h> -#include <sys/stat.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <arpa/inet.h> - -#include <osmocom/core/application.h> -#include <osmocom/core/talloc.h> -#include <osmocom/core/select.h> -#include <osmocom/core/rate_ctr.h> -#include <osmocom/core/stats.h> - -#include <osmocom/gprs/gprs_ns.h> -#include <osmocom/gprs/gprs_bssgp.h> - -#include <openbsc/signal.h> -#include <openbsc/debug.h> -#include <openbsc/vty.h> -#include <openbsc/gb_proxy.h> - -#include <osmocom/vty/command.h> -#include <osmocom/vty/telnet_interface.h> -#include <osmocom/vty/logging.h> -#include <osmocom/vty/stats.h> -#include <osmocom/vty/ports.h> - -#include "../../bscconfig.h" - -#define _GNU_SOURCE -#include <getopt.h> - -void *tall_bsc_ctx; - -const char *openbsc_copyright = - "Copyright (C) 2010 Harald Welte and On-Waves\r\n" - "License AGPLv3+: GNU AGPL version 3 or later <http://gnu.org/licenses/agpl-3.0.html>\r\n" - "This is free software: you are free to change and redistribute it.\r\n" - "There is NO WARRANTY, to the extent permitted by law.\r\n"; - -static char *config_file = "osmo_gbproxy.cfg"; -struct gbproxy_config gbcfg = {0}; -static int daemonize = 0; - -/* Pointer to the SGSN peer */ -extern struct gbprox_peer *gbprox_peer_sgsn; - -/* call-back function for the NS protocol */ -static int proxy_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc, - struct msgb *msg, uint16_t bvci) -{ - int rc = 0; - - switch (event) { - case GPRS_NS_EVT_UNIT_DATA: - rc = gbprox_rcvmsg(&gbcfg, msg, nsvc->nsei, bvci, nsvc->nsvci); - break; - default: - LOGP(DGPRS, LOGL_ERROR, "SGSN: Unknown event %u from NS\n", event); - if (msg) - msgb_free(msg); - rc = -EIO; - break; - } - return rc; -} - -static void signal_handler(int signal) -{ - fprintf(stdout, "signal %u received\n", signal); - - switch (signal) { - case SIGINT: - case SIGTERM: - osmo_signal_dispatch(SS_L_GLOBAL, S_L_GLOBAL_SHUTDOWN, NULL); - sleep(1); - exit(0); - break; - case SIGABRT: - /* in case of abort, we want to obtain a talloc report - * and then return to the caller, who will abort the process */ - case SIGUSR1: - talloc_report(tall_vty_ctx, stderr); - talloc_report_full(tall_bsc_ctx, stderr); - break; - case SIGUSR2: - talloc_report_full(tall_vty_ctx, stderr); - break; - default: - break; - } -} - -static void print_usage() -{ - printf("Usage: bsc_hack\n"); -} - -static void print_help() -{ - printf(" Some useful help...\n"); - printf(" -h --help this text\n"); - printf(" -d option --debug=DNS:DGPRS,0:0 enable debugging\n"); - printf(" -D --daemonize Fork the process into a background daemon\n"); - printf(" -c --config-file filename The config file to use.\n"); - printf(" -s --disable-color\n"); - printf(" -T --timestamp Prefix every log line with a timestamp\n"); - printf(" -V --version. Print the version of OpenBSC.\n"); - printf(" -e --log-level number. Set a global loglevel.\n"); -} - -static void handle_options(int argc, char **argv) -{ - while (1) { - int option_index = 0, c; - static struct option long_options[] = { - { "help", 0, 0, 'h' }, - { "debug", 1, 0, 'd' }, - { "daemonize", 0, 0, 'D' }, - { "config-file", 1, 0, 'c' }, - { "disable-color", 0, 0, 's' }, - { "timestamp", 0, 0, 'T' }, - { "version", 0, 0, 'V' }, - { "log-level", 1, 0, 'e' }, - { 0, 0, 0, 0 } - }; - - c = getopt_long(argc, argv, "hd:Dc:sTVe:", - long_options, &option_index); - if (c == -1) - break; - - switch (c) { - case 'h': - print_usage(); - print_help(); - exit(0); - case 's': - log_set_use_color(osmo_stderr_target, 0); - break; - case 'd': - log_parse_category_mask(osmo_stderr_target, optarg); - break; - case 'D': - daemonize = 1; - break; - case 'c': - config_file = optarg; - break; - case 'T': - log_set_print_timestamp(osmo_stderr_target, 1); - break; - case 'e': - log_set_log_level(osmo_stderr_target, atoi(optarg)); - break; - case 'V': - print_version(1); - exit(0); - break; - default: - break; - } - } -} - -extern int bsc_vty_go_parent(struct vty *vty); - -static struct vty_app_info vty_info = { - .name = "OsmoGbProxy", - .version = PACKAGE_VERSION, - .go_parent_cb = bsc_vty_go_parent, - .is_config_node = bsc_vty_is_config_node, -}; - -/* default categories */ -static struct log_info_cat gprs_categories[] = { - [DGPRS] = { - .name = "DGPRS", - .description = "GPRS Packet Service", - .enabled = 1, .loglevel = LOGL_DEBUG, - }, - [DNS] = { - .name = "DNS", - .description = "GPRS Network Service (NS)", - .enabled = 1, .loglevel = LOGL_INFO, - }, - [DBSSGP] = { - .name = "DBSSGP", - .description = "GPRS BSS Gateway Protocol (BSSGP)", - .enabled = 1, .loglevel = LOGL_DEBUG, - }, -}; - -static const struct log_info gprs_log_info = { - .filter_fn = gprs_log_filter_fn, - .cat = gprs_categories, - .num_cat = ARRAY_SIZE(gprs_categories), -}; - -int main(int argc, char **argv) -{ - struct gsm_network dummy_network; - int rc; - - tall_bsc_ctx = talloc_named_const(NULL, 0, "nsip_proxy"); - msgb_talloc_ctx_init(tall_bsc_ctx, 0); - - signal(SIGINT, &signal_handler); - signal(SIGTERM, &signal_handler); - signal(SIGABRT, &signal_handler); - signal(SIGUSR1, &signal_handler); - signal(SIGUSR2, &signal_handler); - osmo_init_ignore_signals(); - - osmo_init_logging(&gprs_log_info); - - vty_info.copyright = openbsc_copyright; - vty_init(&vty_info); - logging_vty_add_cmds(NULL); - osmo_stats_vty_add_cmds(&gprs_log_info); - gbproxy_vty_init(); - - handle_options(argc, argv); - - rate_ctr_init(tall_bsc_ctx); - osmo_stats_init(tall_bsc_ctx); - - bssgp_nsi = gprs_ns_instantiate(&proxy_ns_cb, tall_bsc_ctx); - if (!bssgp_nsi) { - LOGP(DGPRS, LOGL_ERROR, "Unable to instantiate NS\n"); - exit(1); - } - gbproxy_init_config(&gbcfg); - gbcfg.nsi = bssgp_nsi; - gprs_ns_vty_init(bssgp_nsi); - gprs_ns_set_log_ss(DNS); - bssgp_set_log_ss(DBSSGP); - osmo_signal_register_handler(SS_L_NS, &gbprox_signal, &gbcfg); - - rc = gbproxy_parse_config(config_file, &gbcfg); - if (rc < 0) { - LOGP(DGPRS, LOGL_FATAL, "Cannot parse config file\n"); - exit(2); - } - - /* start telnet after reading config for vty_get_bind_addr() */ - rc = telnet_init_dynif(tall_bsc_ctx, &dummy_network, - vty_get_bind_addr(), OSMO_VTY_PORT_GBPROXY); - if (rc < 0) - exit(1); - - if (!gprs_nsvc_by_nsei(gbcfg.nsi, gbcfg.nsip_sgsn_nsei)) { - LOGP(DGPRS, LOGL_FATAL, "You cannot proxy to NSEI %u " - "without creating that NSEI before\n", - gbcfg.nsip_sgsn_nsei); - exit(2); - } - - rc = gprs_ns_nsip_listen(bssgp_nsi); - if (rc < 0) { - LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen on NSIP socket\n"); - exit(2); - } - - rc = gprs_ns_frgre_listen(bssgp_nsi); - if (rc < 0) { - LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen GRE " - "socket. Do you have CAP_NET_RAW?\n"); - exit(2); - } - - if (daemonize) { - rc = osmo_daemonize(); - if (rc < 0) { - perror("Error during daemonize"); - exit(1); - } - } - - /* Reset all the persistent NS-VCs that we've read from the config */ - gbprox_reset_persistent_nsvcs(bssgp_nsi); - - while (1) { - rc = osmo_select_main(0); - if (rc < 0) - exit(3); - } - - exit(0); -} diff --git a/openbsc/src/gprs/gb_proxy_patch.c b/openbsc/src/gprs/gb_proxy_patch.c deleted file mode 100644 index 210fb2b96..000000000 --- a/openbsc/src/gprs/gb_proxy_patch.c +++ /dev/null @@ -1,459 +0,0 @@ -/* Gb-proxy message patching */ - -/* (C) 2014 by On-Waves - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <openbsc/gb_proxy.h> - -#include <openbsc/gprs_utils.h> -#include <openbsc/gprs_gb_parse.h> - -#include <openbsc/gsm_data.h> -#include <openbsc/debug.h> - -#include <osmocom/gprs/protocol/gsm_08_18.h> -#include <osmocom/core/rate_ctr.h> -#include <osmocom/gsm/apn.h> - -/* patch RA identifier in place */ -static void gbproxy_patch_raid(uint8_t *raid_enc, struct gbproxy_peer *peer, - int to_bss, const char *log_text) -{ - struct gbproxy_patch_state *state = &peer->patch_state; - int old_mcc; - int old_mnc; - struct gprs_ra_id raid; - enum gbproxy_peer_ctr counter = - to_bss ? - GBPROX_PEER_CTR_RAID_PATCHED_SGSN : - GBPROX_PEER_CTR_RAID_PATCHED_BSS; - - if (!state->local_mcc || !state->local_mnc) - return; - - gsm48_parse_ra(&raid, raid_enc); - - old_mcc = raid.mcc; - old_mnc = raid.mnc; - - if (!to_bss) { - /* BSS -> SGSN */ - if (state->local_mcc) - raid.mcc = peer->cfg->core_mcc; - - if (state->local_mnc) - raid.mnc = peer->cfg->core_mnc; - } else { - /* SGSN -> BSS */ - if (state->local_mcc) - raid.mcc = state->local_mcc; - - if (state->local_mnc) - raid.mnc = state->local_mnc; - } - - LOGP(DGPRS, LOGL_DEBUG, - "Patching %s to %s: " - "%d-%d-%d-%d -> %d-%d-%d-%d\n", - log_text, - to_bss ? "BSS" : "SGSN", - old_mcc, old_mnc, raid.lac, raid.rac, - raid.mcc, raid.mnc, raid.lac, raid.rac); - - gsm48_construct_ra(raid_enc, &raid); - rate_ctr_inc(&peer->ctrg->ctr[counter]); -} - -static void gbproxy_patch_apn_ie(struct msgb *msg, - uint8_t *apn_ie, size_t apn_ie_len, - struct gbproxy_peer *peer, - size_t *new_apn_ie_len, const char *log_text) -{ - struct apn_ie_hdr { - uint8_t iei; - uint8_t apn_len; - uint8_t apn[0]; - } *hdr = (void *)apn_ie; - - size_t apn_len = hdr->apn_len; - uint8_t *apn = hdr->apn; - - OSMO_ASSERT(apn_ie_len == apn_len + sizeof(struct apn_ie_hdr)); - OSMO_ASSERT(apn_ie_len > 2 && apn_ie_len <= 102); - - if (peer->cfg->core_apn_size == 0) { - char str1[110]; - /* Remove the IE */ - LOGP(DGPRS, LOGL_DEBUG, - "Patching %s to SGSN: Removing APN '%s'\n", - log_text, - osmo_apn_to_str(str1, apn, apn_len)); - - *new_apn_ie_len = 0; - gprs_msgb_resize_area(msg, apn_ie, apn_ie_len, 0); - } else { - /* Resize the IE */ - char str1[110]; - char str2[110]; - - OSMO_ASSERT(peer->cfg->core_apn_size <= 100); - - LOGP(DGPRS, LOGL_DEBUG, - "Patching %s to SGSN: " - "Replacing APN '%s' -> '%s'\n", - log_text, - osmo_apn_to_str(str1, apn, apn_len), - osmo_apn_to_str(str2, peer->cfg->core_apn, - peer->cfg->core_apn_size)); - - *new_apn_ie_len = peer->cfg->core_apn_size + 2; - gprs_msgb_resize_area(msg, apn, apn_len, peer->cfg->core_apn_size); - memcpy(apn, peer->cfg->core_apn, peer->cfg->core_apn_size); - hdr->apn_len = peer->cfg->core_apn_size; - } - - rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_APN_PATCHED]); -} - -static int gbproxy_patch_tlli(uint8_t *tlli_enc, - struct gbproxy_peer *peer, - uint32_t new_tlli, - int to_bss, const char *log_text) -{ - uint32_t tlli_be; - uint32_t tlli; - enum gbproxy_peer_ctr counter = - to_bss ? - GBPROX_PEER_CTR_TLLI_PATCHED_SGSN : - GBPROX_PEER_CTR_TLLI_PATCHED_BSS; - - memcpy(&tlli_be, tlli_enc, sizeof(tlli_be)); - tlli = ntohl(tlli_be); - - if (tlli == new_tlli) - return 0; - - LOGP(DGPRS, LOGL_DEBUG, - "Patching %ss: " - "Replacing %08x -> %08x\n", - log_text, tlli, new_tlli); - - tlli_be = htonl(new_tlli); - memcpy(tlli_enc, &tlli_be, sizeof(tlli_be)); - - rate_ctr_inc(&peer->ctrg->ctr[counter]); - - return 1; -} - -static int gbproxy_patch_ptmsi(uint8_t *ptmsi_enc, - struct gbproxy_peer *peer, - uint32_t new_ptmsi, - int to_bss, const char *log_text) -{ - uint32_t ptmsi_be; - uint32_t ptmsi; - enum gbproxy_peer_ctr counter = - to_bss ? - GBPROX_PEER_CTR_PTMSI_PATCHED_SGSN : - GBPROX_PEER_CTR_PTMSI_PATCHED_BSS; - memcpy(&ptmsi_be, ptmsi_enc, sizeof(ptmsi_be)); - ptmsi = ntohl(ptmsi_be); - - if (ptmsi == new_ptmsi) - return 0; - - LOGP(DGPRS, LOGL_DEBUG, - "Patching %ss: " - "Replacing %08x -> %08x\n", - log_text, ptmsi, new_ptmsi); - - ptmsi_be = htonl(new_ptmsi); - memcpy(ptmsi_enc, &ptmsi_be, sizeof(ptmsi_be)); - - rate_ctr_inc(&peer->ctrg->ctr[counter]); - - return 1; -} - -int gbproxy_patch_llc(struct msgb *msg, uint8_t *llc, size_t llc_len, - struct gbproxy_peer *peer, - struct gbproxy_link_info *link_info, int *len_change, - struct gprs_gb_parse_context *parse_ctx) -{ - struct gprs_llc_hdr_parsed *ghp = &parse_ctx->llc_hdr_parsed; - int have_patched = 0; - int fcs; - struct gbproxy_config *cfg = peer->cfg; - - if (parse_ctx->ptmsi_enc && link_info && - !parse_ctx->old_raid_is_foreign && peer->cfg->patch_ptmsi) { - uint32_t ptmsi; - if (parse_ctx->to_bss) - ptmsi = link_info->tlli.ptmsi; - else - ptmsi = link_info->sgsn_tlli.ptmsi; - - if (ptmsi != GSM_RESERVED_TMSI) { - if (gbproxy_patch_ptmsi(parse_ctx->ptmsi_enc, peer, - ptmsi, parse_ctx->to_bss, "P-TMSI")) - have_patched = 1; - } else { - /* TODO: invalidate old RAI if present (see below) */ - } - } - - if (parse_ctx->new_ptmsi_enc && link_info && cfg->patch_ptmsi) { - uint32_t ptmsi; - if (parse_ctx->to_bss) - ptmsi = link_info->tlli.ptmsi; - else - ptmsi = link_info->sgsn_tlli.ptmsi; - - OSMO_ASSERT(ptmsi); - if (gbproxy_patch_ptmsi(parse_ctx->new_ptmsi_enc, peer, - ptmsi, parse_ctx->to_bss, "new P-TMSI")) - have_patched = 1; - } - - if (parse_ctx->raid_enc) { - gbproxy_patch_raid(parse_ctx->raid_enc, peer, parse_ctx->to_bss, - parse_ctx->llc_msg_name); - have_patched = 1; - } - - if (parse_ctx->old_raid_enc && !parse_ctx->old_raid_is_foreign) { - /* TODO: Patch to invalid if P-TMSI unknown. */ - gbproxy_patch_raid(parse_ctx->old_raid_enc, peer, parse_ctx->to_bss, - parse_ctx->llc_msg_name); - have_patched = 1; - } - - if (parse_ctx->apn_ie && - cfg->core_apn && - !parse_ctx->to_bss && - gbproxy_imsi_matches(cfg, GBPROX_MATCH_PATCHING, link_info) && - cfg->core_apn) { - size_t new_len; - gbproxy_patch_apn_ie(msg, - parse_ctx->apn_ie, parse_ctx->apn_ie_len, - peer, &new_len, parse_ctx->llc_msg_name); - *len_change += (int)new_len - (int)parse_ctx->apn_ie_len; - - have_patched = 1; - } - - if (have_patched) { - llc_len += *len_change; - ghp->crc_length += *len_change; - - /* Fix FCS */ - fcs = gprs_llc_fcs(llc, ghp->crc_length); - LOGP(DLLC, LOGL_DEBUG, "Updated LLC message, CRC: %06x -> %06x\n", - ghp->fcs, fcs); - - llc[llc_len - 3] = fcs & 0xff; - llc[llc_len - 2] = (fcs >> 8) & 0xff; - llc[llc_len - 1] = (fcs >> 16) & 0xff; - } - - return have_patched; -} - -/* patch BSSGP message to use core_mcc/mnc on the SGSN side */ -void gbproxy_patch_bssgp(struct msgb *msg, uint8_t *bssgp, size_t bssgp_len, - struct gbproxy_peer *peer, - struct gbproxy_link_info *link_info, int *len_change, - struct gprs_gb_parse_context *parse_ctx) -{ - const char *err_info = NULL; - int err_ctr = -1; - - if (parse_ctx->bssgp_raid_enc) - gbproxy_patch_raid(parse_ctx->bssgp_raid_enc, peer, - parse_ctx->to_bss, "BSSGP"); - - if (parse_ctx->need_decryption && - (peer->cfg->patch_ptmsi || peer->cfg->core_apn)) { - /* Patching LLC messages has been requested - * explicitly, but the message (including the - * type) is encrypted, so we possibly fail to - * patch the LLC part of the message. */ - err_ctr = GBPROX_PEER_CTR_PATCH_CRYPT_ERR; - err_info = "GMM message is encrypted"; - goto patch_error; - } - - if (!link_info && parse_ctx->tlli_enc && parse_ctx->to_bss) { - /* Happens with unknown (not cached) TLLI coming from - * the SGSN */ - /* TODO: What shall be done with the message in this case? */ - err_ctr = GBPROX_PEER_CTR_TLLI_UNKNOWN; - err_info = "TLLI sent by the SGSN is unknown"; - goto patch_error; - } - - if (!link_info) - return; - - if (parse_ctx->tlli_enc && peer->cfg->patch_ptmsi) { - uint32_t tlli = gbproxy_map_tlli(parse_ctx->tlli, - link_info, parse_ctx->to_bss); - - if (tlli) { - gbproxy_patch_tlli(parse_ctx->tlli_enc, peer, tlli, - parse_ctx->to_bss, "TLLI"); - parse_ctx->tlli = tlli; - } else { - /* Internal error */ - err_ctr = GBPROX_PEER_CTR_PATCH_ERR; - err_info = "Replacement TLLI is 0"; - goto patch_error; - } - } - - if (parse_ctx->bssgp_ptmsi_enc && peer->cfg->patch_ptmsi) { - uint32_t ptmsi; - if (parse_ctx->to_bss) - ptmsi = link_info->tlli.ptmsi; - else - ptmsi = link_info->sgsn_tlli.ptmsi; - - if (ptmsi != GSM_RESERVED_TMSI) - gbproxy_patch_ptmsi( - parse_ctx->bssgp_ptmsi_enc, peer, - ptmsi, parse_ctx->to_bss, "BSSGP P-TMSI"); - } - - if (parse_ctx->llc) { - uint8_t *llc = parse_ctx->llc; - size_t llc_len = parse_ctx->llc_len; - int llc_len_change = 0; - - gbproxy_patch_llc(msg, llc, llc_len, peer, link_info, - &llc_len_change, parse_ctx); - /* Note that the APN might have been resized here, but no - * pointer int the parse_ctx will refer to an adress after the - * APN. So it's possible to patch first and do the TLLI - * handling afterwards. */ - - if (llc_len_change) { - llc_len += llc_len_change; - - /* Fix LLC IE len */ - /* TODO: This is a kludge, but the a pointer to the - * start of the IE is not available here */ - if (llc[-2] == BSSGP_IE_LLC_PDU && llc[-1] & 0x80) { - /* most probably a one byte length */ - if (llc_len > 127) { - err_info = "Cannot increase size"; - err_ctr = GBPROX_PEER_CTR_PATCH_ERR; - goto patch_error; - } - llc[-1] = llc_len | 0x80; - } else { - llc[-2] = (llc_len >> 8) & 0x7f; - llc[-1] = llc_len & 0xff; - } - *len_change += llc_len_change; - } - /* Note that the tp struct might contain invalid pointers here - * if the LLC field has changed its size */ - parse_ctx->llc_len = llc_len; - } - return; - -patch_error: - OSMO_ASSERT(err_ctr >= 0); - rate_ctr_inc(&peer->ctrg->ctr[err_ctr]); - LOGP(DGPRS, LOGL_ERROR, - "NSEI=%u(%s) failed to patch BSSGP message as requested: %s.\n", - msgb_nsei(msg), parse_ctx->to_bss ? "SGSN" : "BSS", - err_info); -} - -void gbproxy_clear_patch_filter(struct gbproxy_match *match) -{ - if (match->enable) { - regfree(&match->re_comp); - match->enable = 0; - } - talloc_free(match->re_str); - match->re_str = NULL; -} - -int gbproxy_set_patch_filter(struct gbproxy_match *match, const char *filter, - const char **err_msg) -{ - static char err_buf[300]; - int rc; - - gbproxy_clear_patch_filter(match); - - if (!filter) - return 0; - - rc = regcomp(&match->re_comp, filter, - REG_EXTENDED | REG_NOSUB | REG_ICASE); - - if (rc == 0) { - match->enable = 1; - match->re_str = talloc_strdup(tall_bsc_ctx, filter); - return 0; - } - - if (err_msg) { - regerror(rc, &match->re_comp, - err_buf, sizeof(err_buf)); - *err_msg = err_buf; - } - - return -1; -} - -int gbproxy_check_imsi(struct gbproxy_match *match, - const uint8_t *imsi, size_t imsi_len) -{ - char mi_buf[200]; - int rc; - - if (!match->enable) - return 1; - - rc = gprs_is_mi_imsi(imsi, imsi_len); - if (rc > 0) - rc = gsm48_mi_to_string(mi_buf, sizeof(mi_buf), imsi, imsi_len); - if (rc <= 0) { - LOGP(DGPRS, LOGL_NOTICE, "Invalid IMSI %s\n", - osmo_hexdump(imsi, imsi_len)); - return -1; - } - - LOGP(DGPRS, LOGL_DEBUG, "Checking IMSI '%s' (%d)\n", mi_buf, rc); - - rc = regexec(&match->re_comp, mi_buf, 0, NULL, 0); - if (rc == REG_NOMATCH) { - LOGP(DGPRS, LOGL_INFO, - "IMSI '%s' doesn't match pattern '%s'\n", - mi_buf, match->re_str); - return 0; - } - - return 1; -} - diff --git a/openbsc/src/gprs/gb_proxy_peer.c b/openbsc/src/gprs/gb_proxy_peer.c deleted file mode 100644 index 890968717..000000000 --- a/openbsc/src/gprs/gb_proxy_peer.c +++ /dev/null @@ -1,222 +0,0 @@ -/* Gb proxy peer handling */ - -/* (C) 2010 by Harald Welte <laforge@gnumonks.org> - * (C) 2010-2013 by On-Waves - * (C) 2013 by Holger Hans Peter Freyther - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <openbsc/gb_proxy.h> - -#include <openbsc/gsm_data.h> -#include <openbsc/gsm_data_shared.h> -#include <openbsc/debug.h> - -#include <osmocom/gprs/protocol/gsm_08_18.h> -#include <osmocom/core/rate_ctr.h> -#include <osmocom/core/stats.h> -#include <osmocom/core/talloc.h> - -#include <string.h> - -static const struct rate_ctr_desc peer_ctr_description[] = { - { "blocked", "BVC Block " }, - { "unblocked", "BVC Unblock " }, - { "dropped", "BVC blocked, dropped packet " }, - { "inv-nsei", "NSEI mismatch " }, - { "tx-err", "NS Transmission error " }, - { "raid-mod.bss", "RAID patched (BSS )" }, - { "raid-mod.sgsn", "RAID patched (SGSN)" }, - { "apn-mod.sgsn", "APN patched " }, - { "tlli-mod.bss", "TLLI patched (BSS )" }, - { "tlli-mod.sgsn", "TLLI patched (SGSN)" }, - { "ptmsi-mod.bss", "P-TMSI patched (BSS )" }, - { "ptmsi-mod.sgsn","P-TMSI patched (SGSN)" }, - { "mod-crypt-err", "Patch error: encrypted " }, - { "mod-err", "Patch error: other " }, - { "attach-reqs", "Attach Request count " }, - { "attach-rejs", "Attach Reject count " }, - { "attach-acks", "Attach Accept count " }, - { "attach-cpls", "Attach Completed count " }, - { "ra-upd-reqs", "RoutingArea Update Request count" }, - { "ra-upd-rejs", "RoutingArea Update Reject count " }, - { "ra-upd-acks", "RoutingArea Update Accept count " }, - { "ra-upd-cpls", "RoutingArea Update Compltd count" }, - { "gmm-status", "GMM Status count (BSS)" }, - { "gmm-status", "GMM Status count (SGSN)" }, - { "detach-reqs", "Detach Request count " }, - { "detach-acks", "Detach Accept count " }, - { "pdp-act-reqs", "PDP Activation Request count " }, - { "pdp-act-rejs", "PDP Activation Reject count " }, - { "pdp-act-acks", "PDP Activation Accept count " }, - { "pdp-deact-reqs","PDP Deactivation Request count " }, - { "pdp-deact-acks","PDP Deactivation Accept count " }, - { "tlli-unknown", "TLLI from SGSN unknown " }, - { "tlli-cache", "TLLI cache size " }, -}; - -osmo_static_assert(ARRAY_SIZE(peer_ctr_description) == GBPROX_PEER_CTR_LAST, everything_described); - -static const struct rate_ctr_group_desc peer_ctrg_desc = { - .group_name_prefix = "gbproxy.peer", - .group_description = "GBProxy Peer Statistics", - .num_ctr = ARRAY_SIZE(peer_ctr_description), - .ctr_desc = peer_ctr_description, - .class_id = OSMO_STATS_CLASS_PEER, -}; - - -/* Find the gbprox_peer by its BVCI */ -struct gbproxy_peer *gbproxy_peer_by_bvci(struct gbproxy_config *cfg, uint16_t bvci) -{ - struct gbproxy_peer *peer; - llist_for_each_entry(peer, &cfg->bts_peers, list) { - if (peer->bvci == bvci) - return peer; - } - return NULL; -} - -/* Find the gbprox_peer by its NSEI */ -struct gbproxy_peer *gbproxy_peer_by_nsei(struct gbproxy_config *cfg, - uint16_t nsei) -{ - struct gbproxy_peer *peer; - llist_for_each_entry(peer, &cfg->bts_peers, list) { - if (peer->nsei == nsei) - return peer; - } - return NULL; -} - -/* look-up a peer by its Routeing Area Identification (RAI) */ -struct gbproxy_peer *gbproxy_peer_by_rai(struct gbproxy_config *cfg, - const uint8_t *ra) -{ - struct gbproxy_peer *peer; - llist_for_each_entry(peer, &cfg->bts_peers, list) { - if (!memcmp(peer->ra, ra, 6)) - return peer; - } - return NULL; -} - -/* look-up a peer by its Location Area Identification (LAI) */ -struct gbproxy_peer *gbproxy_peer_by_lai(struct gbproxy_config *cfg, - const uint8_t *la) -{ - struct gbproxy_peer *peer; - llist_for_each_entry(peer, &cfg->bts_peers, list) { - if (!memcmp(peer->ra, la, 5)) - return peer; - } - return NULL; -} - -/* look-up a peer by its Location Area Code (LAC) */ -struct gbproxy_peer *gbproxy_peer_by_lac(struct gbproxy_config *cfg, - const uint8_t *la) -{ - struct gbproxy_peer *peer; - llist_for_each_entry(peer, &cfg->bts_peers, list) { - if (!memcmp(peer->ra + 3, la + 3, 2)) - return peer; - } - return NULL; -} - -struct gbproxy_peer *gbproxy_peer_by_bssgp_tlv(struct gbproxy_config *cfg, - struct tlv_parsed *tp) -{ - if (TLVP_PRESENT(tp, BSSGP_IE_BVCI)) { - uint16_t bvci; - - bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); - if (bvci >= 2) - return gbproxy_peer_by_bvci(cfg, bvci); - } - - if (TLVP_PRESENT(tp, BSSGP_IE_ROUTEING_AREA)) { - uint8_t *rai = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA); - /* Only compare LAC part, since MCC/MNC are possibly patched. - * Since the LAC of different BSS must be different when - * MCC/MNC are patched, collisions shouldn't happen. */ - return gbproxy_peer_by_lac(cfg, rai); - } - - if (TLVP_PRESENT(tp, BSSGP_IE_LOCATION_AREA)) { - uint8_t *lai = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_LOCATION_AREA); - return gbproxy_peer_by_lac(cfg, lai); - } - - return NULL; -} - - -struct gbproxy_peer *gbproxy_peer_alloc(struct gbproxy_config *cfg, uint16_t bvci) -{ - struct gbproxy_peer *peer; - - peer = talloc_zero(tall_bsc_ctx, struct gbproxy_peer); - if (!peer) - return NULL; - - peer->bvci = bvci; - peer->ctrg = rate_ctr_group_alloc(peer, &peer_ctrg_desc, bvci); - if (!peer->ctrg) { - talloc_free(peer); - return NULL; - } - peer->cfg = cfg; - - llist_add(&peer->list, &cfg->bts_peers); - - INIT_LLIST_HEAD(&peer->patch_state.logical_links); - - return peer; -} - -void gbproxy_peer_free(struct gbproxy_peer *peer) -{ - llist_del(&peer->list); - - gbproxy_delete_link_infos(peer); - - rate_ctr_group_free(peer->ctrg); - peer->ctrg = NULL; - - talloc_free(peer); -} - -int gbproxy_cleanup_peers(struct gbproxy_config *cfg, uint16_t nsei, uint16_t bvci) -{ - int counter = 0; - struct gbproxy_peer *peer, *tmp; - - llist_for_each_entry_safe(peer, tmp, &cfg->bts_peers, list) { - if (peer->nsei != nsei) - continue; - if (bvci && peer->bvci != bvci) - continue; - - gbproxy_peer_free(peer); - counter += 1; - } - - return counter; -} - diff --git a/openbsc/src/gprs/gb_proxy_tlli.c b/openbsc/src/gprs/gb_proxy_tlli.c deleted file mode 100644 index 3b3b976a5..000000000 --- a/openbsc/src/gprs/gb_proxy_tlli.c +++ /dev/null @@ -1,723 +0,0 @@ -/* Gb-proxy TLLI state handling */ - -/* (C) 2014 by On-Waves - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <osmocom/gsm/gsm48.h> - -#include <openbsc/gb_proxy.h> - -#include <openbsc/gprs_utils.h> -#include <openbsc/gprs_gb_parse.h> - -#include <openbsc/debug.h> - -#include <osmocom/gsm/gsm_utils.h> - -#include <osmocom/core/rate_ctr.h> -#include <osmocom/core/talloc.h> - -struct gbproxy_link_info *gbproxy_link_info_by_tlli(struct gbproxy_peer *peer, - uint32_t tlli) -{ - struct gbproxy_link_info *link_info; - struct gbproxy_patch_state *state = &peer->patch_state; - - if (!tlli) - return NULL; - - llist_for_each_entry(link_info, &state->logical_links, list) - if (link_info->tlli.current == tlli || - link_info->tlli.assigned == tlli) - return link_info; - - return NULL; -} - -struct gbproxy_link_info *gbproxy_link_info_by_ptmsi( - struct gbproxy_peer *peer, - uint32_t ptmsi) -{ - struct gbproxy_link_info *link_info; - struct gbproxy_patch_state *state = &peer->patch_state; - - if (ptmsi == GSM_RESERVED_TMSI) - return NULL; - - llist_for_each_entry(link_info, &state->logical_links, list) - if (link_info->tlli.ptmsi == ptmsi) - return link_info; - - return NULL; -} - -struct gbproxy_link_info *gbproxy_link_info_by_any_sgsn_tlli( - struct gbproxy_peer *peer, - uint32_t tlli) -{ - struct gbproxy_link_info *link_info; - struct gbproxy_patch_state *state = &peer->patch_state; - - if (!tlli) - return NULL; - - /* Don't care about the NSEI */ - llist_for_each_entry(link_info, &state->logical_links, list) - if (link_info->sgsn_tlli.current == tlli || - link_info->sgsn_tlli.assigned == tlli) - return link_info; - - return NULL; -} - -struct gbproxy_link_info *gbproxy_link_info_by_sgsn_tlli( - struct gbproxy_peer *peer, - uint32_t tlli, uint32_t sgsn_nsei) -{ - struct gbproxy_link_info *link_info; - struct gbproxy_patch_state *state = &peer->patch_state; - - if (!tlli) - return NULL; - - llist_for_each_entry(link_info, &state->logical_links, list) - if ((link_info->sgsn_tlli.current == tlli || - link_info->sgsn_tlli.assigned == tlli) && - link_info->sgsn_nsei == sgsn_nsei) - return link_info; - - return NULL; -} - -struct gbproxy_link_info *gbproxy_link_info_by_imsi( - struct gbproxy_peer *peer, - const uint8_t *imsi, - size_t imsi_len) -{ - struct gbproxy_link_info *link_info; - struct gbproxy_patch_state *state = &peer->patch_state; - - if (!gprs_is_mi_imsi(imsi, imsi_len)) - return NULL; - - llist_for_each_entry(link_info, &state->logical_links, list) { - if (link_info->imsi_len != imsi_len) - continue; - if (memcmp(link_info->imsi, imsi, imsi_len) != 0) - continue; - - return link_info; - } - - return NULL; -} - -void gbproxy_link_info_discard_messages(struct gbproxy_link_info *link_info) -{ - struct msgb *msg, *nxt; - - llist_for_each_entry_safe(msg, nxt, &link_info->stored_msgs, list) { - llist_del(&msg->list); - msgb_free(msg); - } -} - -void gbproxy_delete_link_info(struct gbproxy_peer *peer, - struct gbproxy_link_info *link_info) -{ - struct gbproxy_patch_state *state = &peer->patch_state; - - gbproxy_link_info_discard_messages(link_info); - - llist_del(&link_info->list); - talloc_free(link_info); - state->logical_link_count -= 1; - - peer->ctrg->ctr[GBPROX_PEER_CTR_TLLI_CACHE_SIZE].current = - state->logical_link_count; -} - -void gbproxy_delete_link_infos(struct gbproxy_peer *peer) -{ - struct gbproxy_link_info *link_info, *nxt; - struct gbproxy_patch_state *state = &peer->patch_state; - - llist_for_each_entry_safe(link_info, nxt, &state->logical_links, list) - gbproxy_delete_link_info(peer, link_info); - - OSMO_ASSERT(state->logical_link_count == 0); - OSMO_ASSERT(llist_empty(&state->logical_links)); -} - -void gbproxy_attach_link_info(struct gbproxy_peer *peer, time_t now, - struct gbproxy_link_info *link_info) -{ - struct gbproxy_patch_state *state = &peer->patch_state; - - link_info->timestamp = now; - llist_add(&link_info->list, &state->logical_links); - state->logical_link_count += 1; - - peer->ctrg->ctr[GBPROX_PEER_CTR_TLLI_CACHE_SIZE].current = - state->logical_link_count; -} - -int gbproxy_remove_stale_link_infos(struct gbproxy_peer *peer, time_t now) -{ - struct gbproxy_patch_state *state = &peer->patch_state; - int exceeded_max_len = 0; - int deleted_count = 0; - int check_for_age; - - if (peer->cfg->tlli_max_len > 0) - exceeded_max_len = - state->logical_link_count - peer->cfg->tlli_max_len; - - check_for_age = peer->cfg->tlli_max_age > 0; - - for (; exceeded_max_len > 0; exceeded_max_len--) { - struct gbproxy_link_info *link_info; - OSMO_ASSERT(!llist_empty(&state->logical_links)); - link_info = llist_entry(state->logical_links.prev, - struct gbproxy_link_info, - list); - LOGP(DGPRS, LOGL_INFO, - "Removing TLLI %08x from list " - "(stale, length %d, max_len exceeded)\n", - link_info->tlli.current, state->logical_link_count); - - gbproxy_delete_link_info(peer, link_info); - deleted_count += 1; - } - - while (check_for_age && !llist_empty(&state->logical_links)) { - time_t age; - struct gbproxy_link_info *link_info; - link_info = llist_entry(state->logical_links.prev, - struct gbproxy_link_info, - list); - age = now - link_info->timestamp; - /* age < 0 only happens after system time jumps, discard entry */ - if (age <= peer->cfg->tlli_max_age && age >= 0) { - check_for_age = 0; - continue; - } - - LOGP(DGPRS, LOGL_INFO, - "Removing TLLI %08x from list " - "(stale, age %d, max_age exceeded)\n", - link_info->tlli.current, (int)age); - - gbproxy_delete_link_info(peer, link_info); - deleted_count += 1; - } - - return deleted_count; -} - -struct gbproxy_link_info *gbproxy_link_info_alloc( struct gbproxy_peer *peer) -{ - struct gbproxy_link_info *link_info; - - link_info = talloc_zero(peer, struct gbproxy_link_info); - link_info->tlli.ptmsi = GSM_RESERVED_TMSI; - link_info->sgsn_tlli.ptmsi = GSM_RESERVED_TMSI; - - link_info->vu_gen_tx_bss = GBPROXY_INIT_VU_GEN_TX; - - INIT_LLIST_HEAD(&link_info->stored_msgs); - - return link_info; -} - -void gbproxy_detach_link_info( - struct gbproxy_peer *peer, - struct gbproxy_link_info *link_info) -{ - struct gbproxy_patch_state *state = &peer->patch_state; - - llist_del(&link_info->list); - OSMO_ASSERT(state->logical_link_count > 0); - state->logical_link_count -= 1; - - peer->ctrg->ctr[GBPROX_PEER_CTR_TLLI_CACHE_SIZE].current = - state->logical_link_count; -} - -void gbproxy_update_link_info(struct gbproxy_link_info *link_info, - const uint8_t *imsi, size_t imsi_len) -{ - if (!gprs_is_mi_imsi(imsi, imsi_len)) - return; - - link_info->imsi_len = imsi_len; - link_info->imsi = - talloc_realloc_size(link_info, link_info->imsi, imsi_len); - OSMO_ASSERT(link_info->imsi != NULL); - memcpy(link_info->imsi, imsi, imsi_len); -} - -void gbproxy_reassign_tlli(struct gbproxy_tlli_state *tlli_state, - struct gbproxy_peer *peer, uint32_t new_tlli) -{ - if (new_tlli == tlli_state->current) - return; - - LOGP(DGPRS, LOGL_INFO, - "The TLLI has been reassigned from %08x to %08x\n", - tlli_state->current, new_tlli); - - /* Remember assigned TLLI */ - tlli_state->assigned = new_tlli; - tlli_state->bss_validated = 0; - tlli_state->net_validated = 0; -} - -uint32_t gbproxy_map_tlli(uint32_t other_tlli, - struct gbproxy_link_info *link_info, int to_bss) -{ - uint32_t tlli = 0; - struct gbproxy_tlli_state *src, *dst; - if (to_bss) { - src = &link_info->sgsn_tlli; - dst = &link_info->tlli; - } else { - src = &link_info->tlli; - dst = &link_info->sgsn_tlli; - } - if (src->current == other_tlli) - tlli = dst->current; - else if (src->assigned == other_tlli) - tlli = dst->assigned; - - return tlli; -} - -static void gbproxy_validate_tlli(struct gbproxy_tlli_state *tlli_state, - uint32_t tlli, int to_bss) -{ - LOGP(DGPRS, LOGL_DEBUG, - "%s({current = %08x, assigned = %08x, net_vld = %d, bss_vld = %d}, %08x)\n", - __func__, tlli_state->current, tlli_state->assigned, - tlli_state->net_validated, tlli_state->bss_validated, tlli); - - if (!tlli_state->assigned || tlli_state->assigned != tlli) - return; - - /* TODO: Is this ok? Check spec */ - if (gprs_tlli_type(tlli) != TLLI_LOCAL) - return; - - /* See GSM 04.08, 4.7.1.5 */ - if (to_bss) - tlli_state->net_validated = 1; - else - tlli_state->bss_validated = 1; - - if (!tlli_state->bss_validated || !tlli_state->net_validated) - return; - - LOGP(DGPRS, LOGL_INFO, - "The TLLI %08x has been validated (was %08x)\n", - tlli_state->assigned, tlli_state->current); - - tlli_state->current = tlli; - tlli_state->assigned = 0; -} - -static void gbproxy_touch_link_info(struct gbproxy_peer *peer, - struct gbproxy_link_info *link_info, - time_t now) -{ - gbproxy_detach_link_info(peer, link_info); - gbproxy_attach_link_info(peer, now, link_info); -} - -static int gbproxy_unregister_link_info(struct gbproxy_peer *peer, - struct gbproxy_link_info *link_info) -{ - if (!link_info) - return 1; - - if (link_info->tlli.ptmsi == GSM_RESERVED_TMSI && !link_info->imsi_len) { - LOGP(DGPRS, LOGL_INFO, - "Removing TLLI %08x from list (P-TMSI or IMSI are not set)\n", - link_info->tlli.current); - gbproxy_delete_link_info(peer, link_info); - return 1; - } - - link_info->tlli.current = 0; - link_info->tlli.assigned = 0; - link_info->sgsn_tlli.current = 0; - link_info->sgsn_tlli.assigned = 0; - - link_info->is_deregistered = 1; - - gbproxy_reset_link(link_info); - - return 0; -} - -int gbproxy_imsi_matches(struct gbproxy_config *cfg, - enum gbproxy_match_id match_id, - struct gbproxy_link_info *link_info) -{ - struct gbproxy_match *match; - OSMO_ASSERT(match_id >= 0 && match_id < ARRAY_SIZE(cfg->matches)); - - match = &cfg->matches[match_id]; - if (!match->enable) - return 1; - - return link_info != NULL && link_info->is_matching[match_id]; -} - -void gbproxy_assign_imsi(struct gbproxy_peer *peer, - struct gbproxy_link_info *link_info, - struct gprs_gb_parse_context *parse_ctx) -{ - int imsi_matches; - struct gbproxy_link_info *other_link_info; - enum gbproxy_match_id match_id; - - /* Make sure that there is a second entry with the same IMSI */ - other_link_info = gbproxy_link_info_by_imsi( - peer, parse_ctx->imsi, parse_ctx->imsi_len); - - if (other_link_info && other_link_info != link_info) { - char mi_buf[200]; - mi_buf[0] = '\0'; - gsm48_mi_to_string(mi_buf, sizeof(mi_buf), - parse_ctx->imsi, parse_ctx->imsi_len); - LOGP(DGPRS, LOGL_INFO, - "Removing TLLI %08x from list (IMSI %s re-used)\n", - other_link_info->tlli.current, mi_buf); - gbproxy_delete_link_info(peer, other_link_info); - } - - /* Update the IMSI field */ - gbproxy_update_link_info(link_info, - parse_ctx->imsi, parse_ctx->imsi_len); - - /* Check, whether the IMSI matches */ - OSMO_ASSERT(ARRAY_SIZE(link_info->is_matching) == - ARRAY_SIZE(peer->cfg->matches)); - for (match_id = 0; match_id < ARRAY_SIZE(link_info->is_matching); - ++match_id) { - imsi_matches = gbproxy_check_imsi( - &peer->cfg->matches[match_id], - parse_ctx->imsi, parse_ctx->imsi_len); - if (imsi_matches >= 0) - link_info->is_matching[match_id] = imsi_matches; - } -} - -static int gbproxy_tlli_match(const struct gbproxy_tlli_state *a, - const struct gbproxy_tlli_state *b) -{ - if (a->current && a->current == b->current) - return 1; - - if (a->assigned && a->assigned == b->assigned) - return 1; - - if (a->ptmsi != GSM_RESERVED_TMSI && a->ptmsi == b->ptmsi) - return 1; - - return 0; -} - -static void gbproxy_remove_matching_link_infos( - struct gbproxy_peer *peer, struct gbproxy_link_info *link_info) -{ - struct gbproxy_link_info *info, *nxt; - struct gbproxy_patch_state *state = &peer->patch_state; - - /* Make sure that there is no second entry with the same P-TMSI or TLLI */ - llist_for_each_entry_safe(info, nxt, &state->logical_links, list) { - if (info == link_info) - continue; - - if (!gbproxy_tlli_match(&link_info->tlli, &info->tlli) && - (link_info->sgsn_nsei != info->sgsn_nsei || - !gbproxy_tlli_match(&link_info->sgsn_tlli, &info->sgsn_tlli))) - continue; - - LOGP(DGPRS, LOGL_INFO, - "Removing TLLI %08x from list (P-TMSI/TLLI re-used)\n", - info->tlli.current); - gbproxy_delete_link_info(peer, info); - } -} - -static struct gbproxy_link_info *gbproxy_get_link_info_ul( - struct gbproxy_peer *peer, - int *tlli_is_valid, - struct gprs_gb_parse_context *parse_ctx) -{ - struct gbproxy_link_info *link_info = NULL; - - if (parse_ctx->tlli_enc) { - link_info = gbproxy_link_info_by_tlli(peer, parse_ctx->tlli); - - if (link_info) { - *tlli_is_valid = 1; - return link_info; - } - } - - *tlli_is_valid = 0; - - if (!link_info && parse_ctx->imsi) { - link_info = gbproxy_link_info_by_imsi( - peer, parse_ctx->imsi, parse_ctx->imsi_len); - } - - if (!link_info && parse_ctx->ptmsi_enc && !parse_ctx->old_raid_is_foreign) { - uint32_t bss_ptmsi; - gprs_parse_tmsi(parse_ctx->ptmsi_enc, &bss_ptmsi); - link_info = gbproxy_link_info_by_ptmsi(peer, bss_ptmsi); - } - - if (!link_info) - return NULL; - - link_info->is_deregistered = 0; - - return link_info; -} - -struct gbproxy_link_info *gbproxy_update_link_state_ul( - struct gbproxy_peer *peer, - time_t now, - struct gprs_gb_parse_context *parse_ctx) -{ - struct gbproxy_link_info *link_info; - int tlli_is_valid; - - link_info = gbproxy_get_link_info_ul(peer, &tlli_is_valid, parse_ctx); - - if (parse_ctx->tlli_enc && parse_ctx->llc) { - uint32_t sgsn_tlli; - - if (!link_info) { - LOGP(DGPRS, LOGL_INFO, "Adding TLLI %08x to list\n", - parse_ctx->tlli); - link_info = gbproxy_link_info_alloc(peer); - gbproxy_attach_link_info(peer, now, link_info); - - /* Setup TLLIs */ - sgsn_tlli = gbproxy_make_sgsn_tlli(peer, link_info, - parse_ctx->tlli); - link_info->sgsn_tlli.current = sgsn_tlli; - link_info->tlli.current = parse_ctx->tlli; - } else if (!tlli_is_valid) { - /* New TLLI (info found by IMSI or P-TMSI) */ - link_info->tlli.current = parse_ctx->tlli; - link_info->tlli.assigned = 0; - link_info->sgsn_tlli.current = - gbproxy_make_sgsn_tlli(peer, link_info, - parse_ctx->tlli); - link_info->sgsn_tlli.assigned = 0; - gbproxy_touch_link_info(peer, link_info, now); - } else { - sgsn_tlli = gbproxy_map_tlli(parse_ctx->tlli, link_info, 0); - if (!sgsn_tlli) - sgsn_tlli = gbproxy_make_sgsn_tlli(peer, link_info, - parse_ctx->tlli); - - gbproxy_validate_tlli(&link_info->tlli, - parse_ctx->tlli, 0); - gbproxy_validate_tlli(&link_info->sgsn_tlli, - sgsn_tlli, 0); - gbproxy_touch_link_info(peer, link_info, now); - } - } else if (link_info) { - gbproxy_touch_link_info(peer, link_info, now); - } - - if (parse_ctx->imsi && link_info && link_info->imsi_len == 0) - gbproxy_assign_imsi(peer, link_info, parse_ctx); - - return link_info; -} - -static struct gbproxy_link_info *gbproxy_get_link_info_dl( - struct gbproxy_peer *peer, - struct gprs_gb_parse_context *parse_ctx) -{ - struct gbproxy_link_info *link_info = NULL; - - /* Which key to use depends on its availability only, if that fails, do - * not retry it with another key (e.g. IMSI). */ - if (parse_ctx->tlli_enc) - link_info = gbproxy_link_info_by_sgsn_tlli(peer, parse_ctx->tlli, - parse_ctx->peer_nsei); - - /* TODO: Get link_info by (SGSN) P-TMSI if that is available (see - * GSM 08.18, 7.2) instead of using the IMSI as key. */ - else if (parse_ctx->imsi) - link_info = gbproxy_link_info_by_imsi( - peer, parse_ctx->imsi, parse_ctx->imsi_len); - - if (link_info) - link_info->is_deregistered = 0; - - return link_info; -} - -struct gbproxy_link_info *gbproxy_update_link_state_dl( - struct gbproxy_peer *peer, - time_t now, - struct gprs_gb_parse_context *parse_ctx) -{ - struct gbproxy_link_info *link_info = NULL; - - link_info = gbproxy_get_link_info_dl(peer, parse_ctx); - - if (parse_ctx->tlli_enc && parse_ctx->new_ptmsi_enc && link_info) { - /* A new P-TMSI has been signalled in the message, - * register new TLLI */ - uint32_t new_sgsn_ptmsi; - uint32_t new_bss_ptmsi = GSM_RESERVED_TMSI; - gprs_parse_tmsi(parse_ctx->new_ptmsi_enc, &new_sgsn_ptmsi); - - if (link_info->sgsn_tlli.ptmsi == new_sgsn_ptmsi) - new_bss_ptmsi = link_info->tlli.ptmsi; - - if (new_bss_ptmsi == GSM_RESERVED_TMSI) - new_bss_ptmsi = gbproxy_make_bss_ptmsi(peer, new_sgsn_ptmsi); - - LOGP(DGPRS, LOGL_INFO, - "Got new PTMSI %08x from SGSN, using %08x for BSS\n", - new_sgsn_ptmsi, new_bss_ptmsi); - /* Setup PTMSIs */ - link_info->sgsn_tlli.ptmsi = new_sgsn_ptmsi; - link_info->tlli.ptmsi = new_bss_ptmsi; - } else if (parse_ctx->tlli_enc && parse_ctx->new_ptmsi_enc && !link_info && - !peer->cfg->patch_ptmsi) { - /* A new P-TMSI has been signalled in the message with an unknown - * TLLI, create a new link_info */ - /* TODO: Add a test case for this branch */ - uint32_t new_ptmsi; - gprs_parse_tmsi(parse_ctx->new_ptmsi_enc, &new_ptmsi); - - LOGP(DGPRS, LOGL_INFO, - "Adding TLLI %08x to list (SGSN, new P-TMSI is %08x)\n", - parse_ctx->tlli, new_ptmsi); - - link_info = gbproxy_link_info_alloc(peer); - link_info->sgsn_tlli.current = parse_ctx->tlli; - link_info->tlli.current = parse_ctx->tlli; - link_info->sgsn_tlli.ptmsi = new_ptmsi; - link_info->tlli.ptmsi = new_ptmsi; - gbproxy_attach_link_info(peer, now, link_info); - } else if (parse_ctx->tlli_enc && parse_ctx->llc && !link_info && - !peer->cfg->patch_ptmsi) { - /* Unknown SGSN TLLI, create a new link_info */ - uint32_t new_ptmsi; - link_info = gbproxy_link_info_alloc(peer); - LOGP(DGPRS, LOGL_INFO, "Adding TLLI %08x to list (SGSN)\n", - parse_ctx->tlli); - - gbproxy_attach_link_info(peer, now, link_info); - - /* Setup TLLIs */ - link_info->sgsn_tlli.current = parse_ctx->tlli; - link_info->tlli.current = parse_ctx->tlli; - - if (!parse_ctx->new_ptmsi_enc) - return link_info; - /* A new P-TMSI has been signalled in the message */ - - gprs_parse_tmsi(parse_ctx->new_ptmsi_enc, &new_ptmsi); - LOGP(DGPRS, LOGL_INFO, - "Assigning new P-TMSI %08x\n", new_ptmsi); - /* Setup P-TMSIs */ - link_info->sgsn_tlli.ptmsi = new_ptmsi; - link_info->tlli.ptmsi = new_ptmsi; - } else if (parse_ctx->tlli_enc && parse_ctx->llc && link_info) { - uint32_t bss_tlli = gbproxy_map_tlli(parse_ctx->tlli, - link_info, 1); - gbproxy_validate_tlli(&link_info->sgsn_tlli, parse_ctx->tlli, 1); - gbproxy_validate_tlli(&link_info->tlli, bss_tlli, 1); - gbproxy_touch_link_info(peer, link_info, now); - } else if (link_info) { - gbproxy_touch_link_info(peer, link_info, now); - } - - if (parse_ctx->imsi && link_info && link_info->imsi_len == 0) - gbproxy_assign_imsi(peer, link_info, parse_ctx); - - return link_info; -} - -int gbproxy_update_link_state_after( - struct gbproxy_peer *peer, - struct gbproxy_link_info *link_info, - time_t now, - struct gprs_gb_parse_context *parse_ctx) -{ - int rc = 0; - if (parse_ctx->invalidate_tlli && link_info) { - int keep_info = - peer->cfg->keep_link_infos == GBPROX_KEEP_ALWAYS || - (peer->cfg->keep_link_infos == GBPROX_KEEP_REATTACH && - parse_ctx->await_reattach) || - (peer->cfg->keep_link_infos == GBPROX_KEEP_IDENTIFIED && - link_info->imsi_len > 0); - if (keep_info) { - LOGP(DGPRS, LOGL_INFO, "Unregistering TLLI %08x\n", - link_info->tlli.current); - rc = gbproxy_unregister_link_info(peer, link_info); - } else { - LOGP(DGPRS, LOGL_INFO, "Removing TLLI %08x from list\n", - link_info->tlli.current); - gbproxy_delete_link_info(peer, link_info); - rc = 1; - } - } else if (parse_ctx->to_bss && parse_ctx->tlli_enc && - parse_ctx->new_ptmsi_enc && link_info) { - /* A new PTMSI has been signaled in the message, - * register new TLLI */ - uint32_t new_sgsn_ptmsi = link_info->sgsn_tlli.ptmsi; - uint32_t new_bss_ptmsi = link_info->tlli.ptmsi; - uint32_t new_sgsn_tlli; - uint32_t new_bss_tlli = 0; - - new_sgsn_tlli = gprs_tmsi2tlli(new_sgsn_ptmsi, TLLI_LOCAL); - if (new_bss_ptmsi != GSM_RESERVED_TMSI) - new_bss_tlli = gprs_tmsi2tlli(new_bss_ptmsi, TLLI_LOCAL); - LOGP(DGPRS, LOGL_INFO, - "Assigning new TLLI %08x to SGSN, %08x to BSS\n", - new_sgsn_tlli, new_bss_tlli); - - gbproxy_reassign_tlli(&link_info->sgsn_tlli, - peer, new_sgsn_tlli); - gbproxy_reassign_tlli(&link_info->tlli, - peer, new_bss_tlli); - gbproxy_remove_matching_link_infos(peer, link_info); - } - - gbproxy_remove_stale_link_infos(peer, now); - - return rc; -} - - diff --git a/openbsc/src/gprs/gb_proxy_vty.c b/openbsc/src/gprs/gb_proxy_vty.c deleted file mode 100644 index 86d65a8e3..000000000 --- a/openbsc/src/gprs/gb_proxy_vty.c +++ /dev/null @@ -1,853 +0,0 @@ -/* - * (C) 2010 by Harald Welte <laforge@gnumonks.org> - * (C) 2010 by On-Waves - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <sys/socket.h> -#include <netinet/in.h> -#include <arpa/inet.h> -#include <string.h> -#include <time.h> - -#include <osmocom/core/talloc.h> -#include <osmocom/core/rate_ctr.h> - -#include <openbsc/gsm_04_08.h> -#include <osmocom/gprs/gprs_ns.h> -#include <osmocom/gsm/apn.h> - -#include <openbsc/debug.h> -#include <openbsc/gb_proxy.h> -#include <openbsc/gprs_utils.h> -#include <openbsc/vty.h> - -#include <osmocom/vty/command.h> -#include <osmocom/vty/vty.h> -#include <osmocom/vty/misc.h> - -static struct gbproxy_config *g_cfg = NULL; - -/* - * vty code for mgcp below - */ -static struct cmd_node gbproxy_node = { - GBPROXY_NODE, - "%s(config-gbproxy)# ", - 1, -}; - -static const struct value_string keep_modes[] = { - {GBPROX_KEEP_NEVER, "never"}, - {GBPROX_KEEP_REATTACH, "re-attach"}, - {GBPROX_KEEP_IDENTIFIED, "identified"}, - {GBPROX_KEEP_ALWAYS, "always"}, - {0, NULL} -}; - -static const struct value_string match_ids[] = { - {GBPROX_MATCH_PATCHING, "patching"}, - {GBPROX_MATCH_ROUTING, "routing"}, - {0, NULL} -}; - -static void gbprox_vty_print_peer(struct vty *vty, struct gbproxy_peer *peer) -{ - struct gprs_ra_id raid; - gsm48_parse_ra(&raid, peer->ra); - - vty_out(vty, "NSEI %5u, PTP-BVCI %5u, " - "RAI %u-%u-%u-%u", - peer->nsei, peer->bvci, - raid.mcc, raid.mnc, raid.lac, raid.rac); - if (peer->blocked) - vty_out(vty, " [BVC-BLOCKED]"); - - vty_out(vty, "%s", VTY_NEWLINE); -} - -static int config_write_gbproxy(struct vty *vty) -{ - enum gbproxy_match_id match_id; - - vty_out(vty, "gbproxy%s", VTY_NEWLINE); - - vty_out(vty, " sgsn nsei %u%s", g_cfg->nsip_sgsn_nsei, - VTY_NEWLINE); - - if (g_cfg->core_mcc > 0) - vty_out(vty, " core-mobile-country-code %d%s", - g_cfg->core_mcc, VTY_NEWLINE); - if (g_cfg->core_mnc > 0) - vty_out(vty, " core-mobile-network-code %d%s", - g_cfg->core_mnc, VTY_NEWLINE); - - for (match_id = 0; match_id < ARRAY_SIZE(g_cfg->matches); ++match_id) { - struct gbproxy_match *match = &g_cfg->matches[match_id]; - if (match->re_str) - vty_out(vty, " match-imsi %s %s%s", - get_value_string(match_ids, match_id), - match->re_str, VTY_NEWLINE); - } - - if (g_cfg->core_apn != NULL) { - if (g_cfg->core_apn_size > 0) { - char str[500] = {0}; - vty_out(vty, " core-access-point-name %s%s", - osmo_apn_to_str(str, g_cfg->core_apn, - g_cfg->core_apn_size), - VTY_NEWLINE); - } else { - vty_out(vty, " core-access-point-name none%s", - VTY_NEWLINE); - } - } - - if (g_cfg->route_to_sgsn2) - vty_out(vty, " secondary-sgsn nsei %u%s", g_cfg->nsip_sgsn2_nsei, - VTY_NEWLINE); - - if (g_cfg->tlli_max_age > 0) - vty_out(vty, " link-list max-age %d%s", - g_cfg->tlli_max_age, VTY_NEWLINE); - if (g_cfg->tlli_max_len > 0) - vty_out(vty, " link-list max-length %d%s", - g_cfg->tlli_max_len, VTY_NEWLINE); - vty_out(vty, " link-list keep-mode %s%s", - get_value_string(keep_modes, g_cfg->keep_link_infos), - VTY_NEWLINE); - - - return CMD_SUCCESS; -} - -DEFUN(cfg_gbproxy, - cfg_gbproxy_cmd, - "gbproxy", - "Configure the Gb proxy") -{ - vty->node = GBPROXY_NODE; - return CMD_SUCCESS; -} - -DEFUN(cfg_nsip_sgsn_nsei, - cfg_nsip_sgsn_nsei_cmd, - "sgsn nsei <0-65534>", - "SGSN information\n" - "NSEI to be used in the connection with the SGSN\n" - "The NSEI\n") -{ - unsigned int nsei = atoi(argv[0]); - - if (g_cfg->route_to_sgsn2 && g_cfg->nsip_sgsn2_nsei == nsei) { - vty_out(vty, "SGSN NSEI %d conflicts with secondary SGSN NSEI%s", - nsei, VTY_NEWLINE); - return CMD_WARNING; - } - - g_cfg->nsip_sgsn_nsei = nsei; - return CMD_SUCCESS; -} - -#define GBPROXY_CORE_MNC_STR "Use this network code for the core network\n" - -DEFUN(cfg_gbproxy_core_mnc, - cfg_gbproxy_core_mnc_cmd, - "core-mobile-network-code <1-999>", - GBPROXY_CORE_MNC_STR "NCC value\n") -{ - g_cfg->core_mnc = atoi(argv[0]); - return CMD_SUCCESS; -} - -DEFUN(cfg_gbproxy_no_core_mnc, - cfg_gbproxy_no_core_mnc_cmd, - "no core-mobile-network-code", - NO_STR GBPROXY_CORE_MNC_STR) -{ - g_cfg->core_mnc = 0; - return CMD_SUCCESS; -} - -#define GBPROXY_CORE_MCC_STR "Use this country code for the core network\n" - -DEFUN(cfg_gbproxy_core_mcc, - cfg_gbproxy_core_mcc_cmd, - "core-mobile-country-code <1-999>", - GBPROXY_CORE_MCC_STR "MCC value\n") -{ - g_cfg->core_mcc = atoi(argv[0]); - return CMD_SUCCESS; -} - -DEFUN(cfg_gbproxy_no_core_mcc, - cfg_gbproxy_no_core_mcc_cmd, - "no core-mobile-country-code", - NO_STR GBPROXY_CORE_MCC_STR) -{ - g_cfg->core_mcc = 0; - return CMD_SUCCESS; -} - -#define GBPROXY_MATCH_IMSI_STR "Restrict actions to certain IMSIs\n" - -DEFUN(cfg_gbproxy_match_imsi, - cfg_gbproxy_match_imsi_cmd, - "match-imsi (patching|routing) .REGEXP", - GBPROXY_MATCH_IMSI_STR - "Patch MS related information elements on match only\n" - "Route to the secondary SGSN on match only\n" - "Regular expression for the IMSI match\n") -{ - const char *filter = argv[1]; - const char *err_msg = NULL; - struct gbproxy_match *match; - enum gbproxy_match_id match_id = get_string_value(match_ids, argv[0]); - - OSMO_ASSERT(match_id >= GBPROX_MATCH_PATCHING && - match_id < GBPROX_MATCH_LAST); - match = &g_cfg->matches[match_id]; - - if (gbproxy_set_patch_filter(match, filter, &err_msg) != 0) { - vty_out(vty, "Match expression invalid: %s%s", - err_msg, VTY_NEWLINE); - return CMD_WARNING; - } - - g_cfg->acquire_imsi = 1; - - return CMD_SUCCESS; -} - -DEFUN(cfg_gbproxy_no_match_imsi, - cfg_gbproxy_no_match_imsi_cmd, - "no match-imsi", - NO_STR GBPROXY_MATCH_IMSI_STR) -{ - enum gbproxy_match_id match_id; - - for (match_id = 0; match_id < ARRAY_SIZE(g_cfg->matches); ++match_id) - gbproxy_clear_patch_filter(&g_cfg->matches[match_id]); - - g_cfg->acquire_imsi = 0; - - return CMD_SUCCESS; -} - -#define GBPROXY_CORE_APN_STR "Use this access point name (APN) for the backbone\n" -#define GBPROXY_CORE_APN_ARG_STR "Replace APN by this string\n" "Remove APN\n" - -static int set_core_apn(struct vty *vty, const char *apn) -{ - int apn_len; - - if (!apn) { - talloc_free(g_cfg->core_apn); - g_cfg->core_apn = NULL; - g_cfg->core_apn_size = 0; - return CMD_SUCCESS; - } - - apn_len = strlen(apn); - - if (apn_len >= 100) { - vty_out(vty, "APN string too long (max 99 chars)%s", - VTY_NEWLINE); - return CMD_WARNING; - } - - if (apn_len == 0) { - talloc_free(g_cfg->core_apn); - /* TODO: replace NULL */ - g_cfg->core_apn = talloc_zero_size(NULL, 2); - g_cfg->core_apn_size = 0; - } else { - /* TODO: replace NULL */ - g_cfg->core_apn = - talloc_realloc_size(NULL, g_cfg->core_apn, apn_len + 1); - g_cfg->core_apn_size = - gprs_str_to_apn(g_cfg->core_apn, apn_len + 1, apn); - } - - return CMD_SUCCESS; -} - -DEFUN(cfg_gbproxy_core_apn, - cfg_gbproxy_core_apn_cmd, - "core-access-point-name (APN|none)", - GBPROXY_CORE_APN_STR GBPROXY_CORE_APN_ARG_STR) -{ - if (strcmp(argv[0], "none") == 0) - return set_core_apn(vty, ""); - else - return set_core_apn(vty, argv[0]); -} - -DEFUN(cfg_gbproxy_no_core_apn, - cfg_gbproxy_no_core_apn_cmd, - "no core-access-point-name", - NO_STR GBPROXY_CORE_APN_STR) -{ - return set_core_apn(vty, NULL); -} - -/* TODO: Remove the patch-ptmsi command, since P-TMSI patching is enabled - * automatically when needed. This command is only left for manual testing - * (e.g. doing P-TMSI patching without using a secondary SGSN) - */ -#define GBPROXY_PATCH_PTMSI_STR "Patch P-TMSI/TLLI\n" - -DEFUN(cfg_gbproxy_patch_ptmsi, - cfg_gbproxy_patch_ptmsi_cmd, - "patch-ptmsi", - GBPROXY_PATCH_PTMSI_STR) -{ - g_cfg->patch_ptmsi = 1; - - return CMD_SUCCESS; -} - -DEFUN(cfg_gbproxy_no_patch_ptmsi, - cfg_gbproxy_no_patch_ptmsi_cmd, - "no patch-ptmsi", - NO_STR GBPROXY_PATCH_PTMSI_STR) -{ - g_cfg->patch_ptmsi = 0; - - return CMD_SUCCESS; -} - -/* TODO: Remove the acquire-imsi command, since that feature is enabled - * automatically when IMSI matching is enabled. This command is only left for - * manual testing (e.g. doing IMSI acquisition without IMSI based patching) - */ -#define GBPROXY_ACQUIRE_IMSI_STR "Acquire the IMSI before establishing a LLC connection (Experimental)\n" - -DEFUN(cfg_gbproxy_acquire_imsi, - cfg_gbproxy_acquire_imsi_cmd, - "acquire-imsi", - GBPROXY_ACQUIRE_IMSI_STR) -{ - g_cfg->acquire_imsi = 1; - - return CMD_SUCCESS; -} - -DEFUN(cfg_gbproxy_no_acquire_imsi, - cfg_gbproxy_no_acquire_imsi_cmd, - "no acquire-imsi", - NO_STR GBPROXY_ACQUIRE_IMSI_STR) -{ - g_cfg->acquire_imsi = 0; - - return CMD_SUCCESS; -} - -#define GBPROXY_SECOND_SGSN_STR "Route matching LLC connections to a second SGSN (Experimental)\n" - -DEFUN(cfg_gbproxy_secondary_sgsn, - cfg_gbproxy_secondary_sgsn_cmd, - "secondary-sgsn nsei <0-65534>", - GBPROXY_SECOND_SGSN_STR - "NSEI to be used in the connection with the SGSN\n" - "The NSEI\n") -{ - unsigned int nsei = atoi(argv[0]); - - if (g_cfg->nsip_sgsn_nsei == nsei) { - vty_out(vty, "Secondary SGSN NSEI %d conflicts with primary SGSN NSEI%s", - nsei, VTY_NEWLINE); - return CMD_WARNING; - } - - g_cfg->route_to_sgsn2 = 1; - g_cfg->nsip_sgsn2_nsei = nsei; - - g_cfg->patch_ptmsi = 1; - - return CMD_SUCCESS; -} - -DEFUN(cfg_gbproxy_no_secondary_sgsn, - cfg_gbproxy_no_secondary_sgsn_cmd, - "no secondary-sgsn", - NO_STR GBPROXY_SECOND_SGSN_STR) -{ - g_cfg->route_to_sgsn2 = 0; - g_cfg->nsip_sgsn2_nsei = 0xFFFF; - - g_cfg->patch_ptmsi = 0; - - return CMD_SUCCESS; -} - -#define GBPROXY_LINK_LIST_STR "Set TLLI list parameters\n" -#define GBPROXY_MAX_AGE_STR "Limit maximum age\n" - -DEFUN(cfg_gbproxy_link_list_max_age, - cfg_gbproxy_link_list_max_age_cmd, - "link-list max-age <1-999999>", - GBPROXY_LINK_LIST_STR GBPROXY_MAX_AGE_STR - "Maximum age in seconds\n") -{ - g_cfg->tlli_max_age = atoi(argv[0]); - - return CMD_SUCCESS; -} - -DEFUN(cfg_gbproxy_link_list_no_max_age, - cfg_gbproxy_link_list_no_max_age_cmd, - "no link-list max-age", - NO_STR GBPROXY_LINK_LIST_STR GBPROXY_MAX_AGE_STR) -{ - g_cfg->tlli_max_age = 0; - - return CMD_SUCCESS; -} - -#define GBPROXY_MAX_LEN_STR "Limit list length\n" - -DEFUN(cfg_gbproxy_link_list_max_len, - cfg_gbproxy_link_list_max_len_cmd, - "link-list max-length <1-99999>", - GBPROXY_LINK_LIST_STR GBPROXY_MAX_LEN_STR - "Maximum number of logical links in the list\n") -{ - g_cfg->tlli_max_len = atoi(argv[0]); - - return CMD_SUCCESS; -} - -DEFUN(cfg_gbproxy_link_list_no_max_len, - cfg_gbproxy_link_list_no_max_len_cmd, - "no link-list max-length", - NO_STR GBPROXY_LINK_LIST_STR GBPROXY_MAX_LEN_STR) -{ - g_cfg->tlli_max_len = 0; - - return CMD_SUCCESS; -} - -DEFUN(cfg_gbproxy_link_list_keep_mode, - cfg_gbproxy_link_list_keep_mode_cmd, - "link-list keep-mode (never|re-attach|identified|always)", - GBPROXY_LINK_LIST_STR "How to keep entries for detached logical links\n" - "Discard entry immediately after detachment\n" - "Keep entry if a re-attachment has be requested\n" - "Keep entry if it associated with an IMSI\n" - "Don't discard entries after detachment\n") -{ - int val = get_string_value(keep_modes, argv[0]); - OSMO_ASSERT(val >= GBPROX_KEEP_NEVER && val <= GBPROX_KEEP_ALWAYS); - g_cfg->keep_link_infos = val; - - return CMD_SUCCESS; -} - - -DEFUN(show_gbproxy, show_gbproxy_cmd, "show gbproxy [stats]", - SHOW_STR "Display information about the Gb proxy\n" "Show statistics\n") -{ - struct gbproxy_peer *peer; - int show_stats = argc >= 1; - - if (show_stats) - vty_out_rate_ctr_group(vty, "", g_cfg->ctrg); - - llist_for_each_entry(peer, &g_cfg->bts_peers, list) { - gbprox_vty_print_peer(vty, peer); - - if (show_stats) - vty_out_rate_ctr_group(vty, " ", peer->ctrg); - } - return CMD_SUCCESS; -} - -DEFUN(show_gbproxy_links, show_gbproxy_links_cmd, "show gbproxy links", - SHOW_STR "Display information about the Gb proxy\n" "Show logical links\n") -{ - struct gbproxy_peer *peer; - char mi_buf[200]; - time_t now; - struct timespec ts = {0,}; - - clock_gettime(CLOCK_MONOTONIC, &ts); - now = ts.tv_sec; - - llist_for_each_entry(peer, &g_cfg->bts_peers, list) { - struct gbproxy_link_info *link_info; - struct gbproxy_patch_state *state = &peer->patch_state; - - gbprox_vty_print_peer(vty, peer); - - llist_for_each_entry(link_info, &state->logical_links, list) { - time_t age = now - link_info->timestamp; - int stored_msgs = 0; - struct llist_head *iter; - llist_for_each(iter, &link_info->stored_msgs) - stored_msgs++; - - if (link_info->imsi > 0) { - snprintf(mi_buf, sizeof(mi_buf), "(invalid)"); - gsm48_mi_to_string(mi_buf, sizeof(mi_buf), - link_info->imsi, - link_info->imsi_len); - } else { - snprintf(mi_buf, sizeof(mi_buf), "(none)"); - } - vty_out(vty, " TLLI %08x, IMSI %s, AGE %d", - link_info->tlli.current, mi_buf, (int)age); - - if (stored_msgs) - vty_out(vty, ", STORED %d", stored_msgs); - - if (g_cfg->route_to_sgsn2) - vty_out(vty, ", SGSN NSEI %d", - link_info->sgsn_nsei); - - if (link_info->is_deregistered) - vty_out(vty, ", DE-REGISTERED"); - - vty_out(vty, "%s", VTY_NEWLINE); - } - } - return CMD_SUCCESS; -} - -DEFUN(delete_gb_bvci, delete_gb_bvci_cmd, - "delete-gbproxy-peer <0-65534> bvci <2-65534>", - "Delete a GBProxy peer by NSEI and optionally BVCI\n" - "NSEI number\n" - "Only delete peer with a matching BVCI\n" - "BVCI number\n") -{ - const uint16_t nsei = atoi(argv[0]); - const uint16_t bvci = atoi(argv[1]); - int counter; - - counter = gbproxy_cleanup_peers(g_cfg, nsei, bvci); - - if (counter == 0) { - vty_out(vty, "BVC not found%s", VTY_NEWLINE); - return CMD_WARNING; - } - - return CMD_SUCCESS; -} - -DEFUN(delete_gb_nsei, delete_gb_nsei_cmd, - "delete-gbproxy-peer <0-65534> (only-bvc|only-nsvc|all) [dry-run]", - "Delete a GBProxy peer by NSEI and optionally BVCI\n" - "NSEI number\n" - "Only delete BSSGP connections (BVC)\n" - "Only delete dynamic NS connections (NS-VC)\n" - "Delete BVC and dynamic NS connections\n" - "Show what would be deleted instead of actually deleting\n" - ) -{ - const uint16_t nsei = atoi(argv[0]); - const char *mode = argv[1]; - int dry_run = argc > 2; - int delete_bvc = 0; - int delete_nsvc = 0; - int counter; - - if (strcmp(mode, "only-bvc") == 0) - delete_bvc = 1; - else if (strcmp(mode, "only-nsvc") == 0) - delete_nsvc = 1; - else - delete_bvc = delete_nsvc = 1; - - if (delete_bvc) { - if (!dry_run) - counter = gbproxy_cleanup_peers(g_cfg, nsei, 0); - else { - struct gbproxy_peer *peer; - counter = 0; - llist_for_each_entry(peer, &g_cfg->bts_peers, list) { - if (peer->nsei != nsei) - continue; - - vty_out(vty, "BVC: "); - gbprox_vty_print_peer(vty, peer); - counter += 1; - } - } - vty_out(vty, "%sDeleted %d BVC%s", - dry_run ? "Not " : "", counter, VTY_NEWLINE); - } - - if (delete_nsvc) { - struct gprs_ns_inst *nsi = g_cfg->nsi; - struct gprs_nsvc *nsvc, *nsvc2; - - counter = 0; - llist_for_each_entry_safe(nsvc, nsvc2, &nsi->gprs_nsvcs, list) { - if (nsvc->nsei != nsei) - continue; - if (nsvc->persistent) - continue; - - if (!dry_run) - gprs_nsvc_delete(nsvc); - else - vty_out(vty, "NS-VC: NSEI %5u, NS-VCI %5u, " - "remote %s%s", - nsvc->nsei, nsvc->nsvci, - gprs_ns_ll_str(nsvc), VTY_NEWLINE); - counter += 1; - } - vty_out(vty, "%sDeleted %d NS-VC%s", - dry_run ? "Not " : "", counter, VTY_NEWLINE); - } - - return CMD_SUCCESS; -} - -#define GBPROXY_DELETE_LINK_STR \ - "Delete a GBProxy logical link entry by NSEI and identification\nNSEI number\n" - -DEFUN(delete_gb_link_by_id, delete_gb_link_by_id_cmd, - "delete-gbproxy-link <0-65534> (tlli|imsi|sgsn-nsei) IDENT", - GBPROXY_DELETE_LINK_STR - "Delete entries with a matching TLLI (hex)\n" - "Delete entries with a matching IMSI\n" - "Delete entries with a matching SGSN NSEI\n" - "Identification to match\n") -{ - const uint16_t nsei = atoi(argv[0]); - enum {MATCH_TLLI = 't', MATCH_IMSI = 'i', MATCH_SGSN = 's'} match; - uint32_t ident = 0; - const char *imsi = NULL; - struct gbproxy_peer *peer = 0; - struct gbproxy_link_info *link_info, *nxt; - struct gbproxy_patch_state *state; - char mi_buf[200]; - int found = 0; - - match = argv[1][0]; - - switch (match) { - case MATCH_TLLI: ident = strtoll(argv[2], NULL, 16); break; - case MATCH_IMSI: imsi = argv[2]; break; - case MATCH_SGSN: ident = strtoll(argv[2], NULL, 0); break; - }; - - peer = gbproxy_peer_by_nsei(g_cfg, nsei); - if (!peer) { - vty_out(vty, "Didn't find peer with NSEI %d%s", - nsei, VTY_NEWLINE); - return CMD_WARNING; - } - - state = &peer->patch_state; - - llist_for_each_entry_safe(link_info, nxt, &state->logical_links, list) { - switch (match) { - case MATCH_TLLI: - if (link_info->tlli.current != ident) - continue; - break; - case MATCH_SGSN: - if (link_info->sgsn_nsei != ident) - continue; - break; - case MATCH_IMSI: - if (!link_info->imsi) - continue; - mi_buf[0] = '\0'; - gsm48_mi_to_string(mi_buf, sizeof(mi_buf), - link_info->imsi, - link_info->imsi_len); - - if (strcmp(mi_buf, imsi) != 0) - continue; - break; - } - - vty_out(vty, "Deleting link with TLLI %08x%s", link_info->tlli.current, - VTY_NEWLINE); - gbproxy_delete_link_info(peer, link_info); - found += 1; - } - - if (!found && argc >= 2) { - vty_out(vty, "Didn't find link entry with %s %s%s", - argv[1], argv[2], VTY_NEWLINE); - } - - return CMD_SUCCESS; -} - -DEFUN(delete_gb_link, delete_gb_link_cmd, - "delete-gbproxy-link <0-65534> (stale|de-registered)", - GBPROXY_DELETE_LINK_STR - "Delete stale entries\n" - "Delete de-registered entries\n") -{ - const uint16_t nsei = atoi(argv[0]); - enum {MATCH_STALE = 's', MATCH_DEREGISTERED = 'd'} match; - struct gbproxy_peer *peer = 0; - struct gbproxy_link_info *link_info, *nxt; - struct gbproxy_patch_state *state; - time_t now; - struct timespec ts = {0,}; - - int found = 0; - - match = argv[1][0]; - - peer = gbproxy_peer_by_nsei(g_cfg, nsei); - if (!peer) { - vty_out(vty, "Didn't find peer with NSEI %d%s", - nsei, VTY_NEWLINE); - return CMD_WARNING; - } - - state = &peer->patch_state; - - clock_gettime(CLOCK_MONOTONIC, &ts); - now = ts.tv_sec; - - if (match == MATCH_STALE) { - found = gbproxy_remove_stale_link_infos(peer, now); - if (found) - vty_out(vty, "Deleted %d stale logical link%s%s", - found, found == 1 ? "" : "s", VTY_NEWLINE); - } else { - llist_for_each_entry_safe(link_info, nxt, - &state->logical_links, list) { - if (!link_info->is_deregistered) - continue; - - gbproxy_delete_link_info(peer, link_info); - found += 1; - } - } - - if (found) - vty_out(vty, "Deleted %d %s logical link%s%s", - found, argv[1], found == 1 ? "" : "s", VTY_NEWLINE); - - return CMD_SUCCESS; -} - -/* - * legacy commands to provide an upgrade path from "broken" releases - * or pre-releases - */ -DEFUN_DEPRECATED(cfg_gbproxy_broken_apn_match, - cfg_gbproxy_broken_apn_match_cmd, - "core-access-point-name none match-imsi .REGEXP", - GBPROXY_CORE_APN_STR GBPROXY_MATCH_IMSI_STR "Remove APN\n" - "Patch MS related information elements on match only\n" - "Route to the secondary SGSN on match only\n" - "Regular expression for the IMSI match\n") -{ - const char *filter = argv[0]; - const char *err_msg = NULL; - struct gbproxy_match *match; - enum gbproxy_match_id match_id = get_string_value(match_ids, "patching"); - - /* apply APN none */ - set_core_apn(vty, ""); - - /* do the matching... with copy and paste */ - OSMO_ASSERT(match_id >= GBPROX_MATCH_PATCHING && - match_id < GBPROX_MATCH_LAST); - match = &g_cfg->matches[match_id]; - - if (gbproxy_set_patch_filter(match, filter, &err_msg) != 0) { - vty_out(vty, "Match expression invalid: %s%s", - err_msg, VTY_NEWLINE); - return CMD_WARNING; - } - - g_cfg->acquire_imsi = 1; - - return CMD_SUCCESS; -} - -#define GBPROXY_TLLI_LIST_STR "Set TLLI list parameters\n" -#define GBPROXY_MAX_LEN_STR "Limit list length\n" -DEFUN_DEPRECATED(cfg_gbproxy_depr_tlli_list_max_len, - cfg_gbproxy_depr_tlli_list_max_len_cmd, - "tlli-list max-length <1-99999>", - GBPROXY_TLLI_LIST_STR GBPROXY_MAX_LEN_STR - "Maximum number of TLLIs in the list\n") -{ - g_cfg->tlli_max_len = atoi(argv[0]); - - return CMD_SUCCESS; -} - -int gbproxy_vty_init(void) -{ - install_element_ve(&show_gbproxy_cmd); - install_element_ve(&show_gbproxy_links_cmd); - - install_element(ENABLE_NODE, &delete_gb_bvci_cmd); - install_element(ENABLE_NODE, &delete_gb_nsei_cmd); - install_element(ENABLE_NODE, &delete_gb_link_by_id_cmd); - install_element(ENABLE_NODE, &delete_gb_link_cmd); - - install_element(CONFIG_NODE, &cfg_gbproxy_cmd); - install_node(&gbproxy_node, config_write_gbproxy); - vty_install_default(GBPROXY_NODE); - install_element(GBPROXY_NODE, &cfg_nsip_sgsn_nsei_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_core_mcc_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_core_mnc_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_match_imsi_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_core_apn_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_secondary_sgsn_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_patch_ptmsi_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_acquire_imsi_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_link_list_max_age_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_link_list_max_len_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_link_list_keep_mode_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_no_core_mcc_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_no_core_mnc_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_no_match_imsi_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_no_core_apn_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_no_secondary_sgsn_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_no_patch_ptmsi_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_no_acquire_imsi_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_link_list_no_max_age_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_link_list_no_max_len_cmd); - - /* broken or deprecated to allow an upgrade path */ - install_element(GBPROXY_NODE, &cfg_gbproxy_broken_apn_match_cmd); - install_element(GBPROXY_NODE, &cfg_gbproxy_depr_tlli_list_max_len_cmd); - - return 0; -} - -int gbproxy_parse_config(const char *config_file, struct gbproxy_config *cfg) -{ - int rc; - - g_cfg = cfg; - rc = vty_read_config_file(config_file, NULL); - if (rc < 0) { - fprintf(stderr, "Failed to parse the config file: '%s'\n", config_file); - return rc; - } - - return 0; -} - diff --git a/openbsc/src/gprs/gprs_gb_parse.c b/openbsc/src/gprs/gprs_gb_parse.c deleted file mode 100644 index d5a122bda..000000000 --- a/openbsc/src/gprs/gprs_gb_parse.c +++ /dev/null @@ -1,636 +0,0 @@ -/* GPRS Gb message parser */ - -/* (C) 2014 by On-Waves - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <osmocom/gsm/gsm48.h> -#include <osmocom/gsm/protocol/gsm_04_08_gprs.h> - -#include <openbsc/gprs_gb_parse.h> - -#include <openbsc/gprs_utils.h> - -#include <openbsc/debug.h> - -#include <osmocom/gprs/gprs_bssgp.h> - -static int gprs_gb_parse_gmm_attach_req(uint8_t *data, size_t data_len, - struct gprs_gb_parse_context *parse_ctx) -{ - uint8_t *value; - size_t value_len; - - parse_ctx->llc_msg_name = "ATTACH_REQ"; - - /* Skip MS network capability */ - if (osmo_shift_lv(&data, &data_len, NULL, &value_len) <= 0 || - value_len < 1 || value_len > 8) - /* invalid */ - return 0; - - /* Skip Attach type */ - /* Skip Ciphering key sequence number */ - /* Skip DRX parameter */ - osmo_shift_v_fixed(&data, &data_len, 3, NULL); - - /* Get Mobile identity */ - if (osmo_shift_lv(&data, &data_len, &value, &value_len) <= 0 || - value_len < 5 || value_len > 8) - /* invalid */ - return 0; - - if (gprs_is_mi_tmsi(value, value_len)) { - parse_ctx->ptmsi_enc = value + 1; - } else if (gprs_is_mi_imsi(value, value_len)) { - parse_ctx->imsi = value; - parse_ctx->imsi_len = value_len; - } - - if (osmo_shift_v_fixed(&data, &data_len, 6, &value) <= 0) - return 0; - - parse_ctx->old_raid_enc = value; - - return 1; -} - -static int gprs_gb_parse_gmm_attach_ack(uint8_t *data, size_t data_len, - struct gprs_gb_parse_context *parse_ctx) -{ - uint8_t *value; - size_t value_len; - - parse_ctx->llc_msg_name = "ATTACH_ACK"; - - /* Skip Attach result */ - /* Skip Force to standby */ - /* Skip Periodic RA update timer */ - /* Skip Radio priority for SMS */ - /* Skip Spare half octet */ - osmo_shift_v_fixed(&data, &data_len, 3, NULL); - - if (osmo_shift_v_fixed(&data, &data_len, 6, &value) <= 0) - return 0; - - parse_ctx->raid_enc = value; - - /* Skip P-TMSI signature (P-TMSI signature, opt, TV, length 4) */ - osmo_match_shift_tv_fixed(&data, &data_len, GSM48_IE_GMM_PTMSI_SIG, 3, NULL); - - /* Skip Negotiated READY timer value (GPRS timer, opt, TV, length 2) */ - osmo_match_shift_tv_fixed(&data, &data_len, GSM48_IE_GMM_TIMER_READY, 1, NULL); - - /* Allocated P-TMSI (Mobile identity, opt, TLV, length 7) */ - if (osmo_match_shift_tlv(&data, &data_len, GSM48_IE_GMM_ALLOC_PTMSI, - &value, &value_len) > 0 && - gprs_is_mi_tmsi(value, value_len)) - parse_ctx->new_ptmsi_enc = value + 1; - return 1; -} - -static int gprs_gb_parse_gmm_attach_rej(uint8_t *data, size_t data_len, - struct gprs_gb_parse_context *parse_ctx) -{ - uint8_t *value; - - parse_ctx->llc_msg_name = "ATTACH_REJ"; - - /* GMM cause */ - if (osmo_shift_v_fixed(&data, &data_len, 1, &value) <= 0) - return 0; - - parse_ctx->invalidate_tlli = 1; - - return 1; -} - - -static int gprs_gb_parse_gmm_detach_req(uint8_t *data, size_t data_len, - struct gprs_gb_parse_context *parse_ctx) -{ - uint8_t *value; - size_t value_len; - int detach_type; - int power_off; - - parse_ctx->llc_msg_name = "DETACH_REQ"; - - /* Skip spare half octet */ - /* Get Detach type */ - if (osmo_shift_v_fixed(&data, &data_len, 1, &value) <= 0) - /* invalid */ - return 0; - - detach_type = *value & 0x07; - power_off = *value & 0x08 ? 1 : 0; - - if (parse_ctx->to_bss) { - /* Network originated */ - if (detach_type == GPRS_DET_T_MT_REATT_REQ) - parse_ctx->await_reattach = 1; - } else { - /* Mobile originated */ - - if (power_off) - parse_ctx->invalidate_tlli = 1; - - /* Get P-TMSI (Mobile identity), see GSM 24.008, 9.4.5.2 */ - if (osmo_match_shift_tlv(&data, &data_len, - GSM48_IE_GMM_ALLOC_PTMSI, &value, &value_len) > 0) - { - if (gprs_is_mi_tmsi(value, value_len)) - parse_ctx->ptmsi_enc = value + 1; - } - } - - return 1; -} - -static int gprs_gb_parse_gmm_ra_upd_req(uint8_t *data, size_t data_len, - struct gprs_gb_parse_context *parse_ctx) -{ - uint8_t *value; - - parse_ctx->llc_msg_name = "RA_UPD_REQ"; - - /* Skip Update type */ - /* Skip GPRS ciphering key sequence number */ - osmo_shift_v_fixed(&data, &data_len, 1, NULL); - - if (osmo_shift_v_fixed(&data, &data_len, 6, &value) <= 0) - return 0; - - parse_ctx->old_raid_enc = value; - - return 1; -} - -static int gprs_gb_parse_gmm_ra_upd_rej(uint8_t *data, size_t data_len, - struct gprs_gb_parse_context *parse_ctx) -{ - uint8_t *value; - uint8_t cause; - int force_standby; - - parse_ctx->llc_msg_name = "RA_UPD_REJ"; - - /* GMM cause */ - if (osmo_shift_v_fixed(&data, &data_len, 1, &value) <= 0) - return 0; - - cause = value[0]; - - /* Force to standby, 1/2 */ - /* spare bits, 1/2 */ - if (osmo_shift_v_fixed(&data, &data_len, 1, &value) <= 0) - return 0; - - force_standby = (value[0] & 0x07) == 0x01; - - if (cause == GMM_CAUSE_IMPL_DETACHED && !force_standby) - parse_ctx->await_reattach = 1; - - parse_ctx->invalidate_tlli = 1; - - return 1; -} - -static int gprs_gb_parse_gmm_ra_upd_ack(uint8_t *data, size_t data_len, - struct gprs_gb_parse_context *parse_ctx) -{ - uint8_t *value; - size_t value_len; - - parse_ctx->llc_msg_name = "RA_UPD_ACK"; - - /* Skip Force to standby */ - /* Skip Update result */ - /* Skip Periodic RA update timer */ - osmo_shift_v_fixed(&data, &data_len, 2, NULL); - - if (osmo_shift_v_fixed(&data, &data_len, 6, &value) <= 0) - return 0; - - parse_ctx->raid_enc = value; - - /* Skip P-TMSI signature (P-TMSI signature, opt, TV, length 4) */ - osmo_match_shift_tv_fixed(&data, &data_len, GSM48_IE_GMM_PTMSI_SIG, 3, NULL); - - /* Allocated P-TMSI (Mobile identity, opt, TLV, length 7) */ - if (osmo_match_shift_tlv(&data, &data_len, GSM48_IE_GMM_ALLOC_PTMSI, - &value, &value_len) > 0 && - gprs_is_mi_tmsi(value, value_len)) - parse_ctx->new_ptmsi_enc = value + 1; - - return 1; -} - -static int gprs_gb_parse_gmm_ptmsi_reall_cmd(uint8_t *data, size_t data_len, - struct gprs_gb_parse_context *parse_ctx) -{ - uint8_t *value; - size_t value_len; - - parse_ctx->llc_msg_name = "PTMSI_REALL_CMD"; - - LOGP(DLLC, LOGL_NOTICE, - "Got P-TMSI Reallocation Command which is not covered by unit tests yet.\n"); - - /* Allocated P-TMSI */ - if (osmo_shift_lv(&data, &data_len, &value, &value_len) > 0 && - gprs_is_mi_tmsi(value, value_len)) - parse_ctx->new_ptmsi_enc = value + 1; - - if (osmo_shift_v_fixed(&data, &data_len, 6, &value) <= 0) - return 0; - - parse_ctx->raid_enc = value; - - return 1; -} - -static int gprs_gb_parse_gmm_id_resp(uint8_t *data, size_t data_len, - struct gprs_gb_parse_context *parse_ctx) -{ - uint8_t *value; - size_t value_len; - - parse_ctx->llc_msg_name = "ID_RESP"; - - /* Mobile identity, Mobile identity 10.5.1.4, M LV 2-10 */ - if (osmo_shift_lv(&data, &data_len, &value, &value_len) <= 0 || - value_len < 1 || value_len > 9) - /* invalid */ - return 0; - - if (gprs_is_mi_tmsi(value, value_len)) { - parse_ctx->ptmsi_enc = value + 1; - } else if (gprs_is_mi_imsi(value, value_len)) { - parse_ctx->imsi = value; - parse_ctx->imsi_len = value_len; - } - - return 1; -} - -static int gprs_gb_parse_gsm_act_pdp_req(uint8_t *data, size_t data_len, - struct gprs_gb_parse_context *parse_ctx) -{ - ssize_t old_len; - uint8_t *value; - size_t value_len; - - parse_ctx->llc_msg_name = "ACT_PDP_REQ"; - - /* Skip Requested NSAPI */ - /* Skip Requested LLC SAPI */ - osmo_shift_v_fixed(&data, &data_len, 2, NULL); - - /* Skip Requested QoS (support 04.08 and 24.008) */ - if (osmo_shift_lv(&data, &data_len, NULL, &value_len) <= 0 || - value_len < 4 || value_len > 14) - /* invalid */ - return 0; - - /* Skip Requested PDP address */ - if (osmo_shift_lv(&data, &data_len, NULL, &value_len) <= 0 || - value_len < 2 || value_len > 18) - /* invalid */ - return 0; - - /* Access point name */ - old_len = osmo_match_shift_tlv(&data, &data_len, - GSM48_IE_GSM_APN, &value, &value_len); - - if (old_len > 0 && value_len >=1 && value_len <= 100) { - parse_ctx->apn_ie = data - old_len; - parse_ctx->apn_ie_len = old_len; - } - - return 1; -} - -int gprs_gb_parse_dtap(uint8_t *data, size_t data_len, - struct gprs_gb_parse_context *parse_ctx) -{ - struct gsm48_hdr *g48h; - uint8_t pdisc; - uint8_t msg_type; - - if (osmo_shift_v_fixed(&data, &data_len, sizeof(*g48h), (uint8_t **)&g48h) <= 0) - return 0; - - parse_ctx->g48_hdr = g48h; - - pdisc = gsm48_hdr_pdisc(g48h); - if (pdisc != GSM48_PDISC_MM_GPRS && pdisc != GSM48_PDISC_SM_GPRS) - return 1; - - msg_type = gsm48_hdr_msg_type(g48h); - switch (msg_type) { - case GSM48_MT_GMM_ATTACH_REQ: - return gprs_gb_parse_gmm_attach_req(data, data_len, parse_ctx); - - case GSM48_MT_GMM_ATTACH_REJ: - return gprs_gb_parse_gmm_attach_rej(data, data_len, parse_ctx); - - case GSM48_MT_GMM_ATTACH_ACK: - return gprs_gb_parse_gmm_attach_ack(data, data_len, parse_ctx); - - case GSM48_MT_GMM_RA_UPD_REQ: - return gprs_gb_parse_gmm_ra_upd_req(data, data_len, parse_ctx); - - case GSM48_MT_GMM_RA_UPD_REJ: - return gprs_gb_parse_gmm_ra_upd_rej(data, data_len, parse_ctx); - - case GSM48_MT_GMM_RA_UPD_ACK: - return gprs_gb_parse_gmm_ra_upd_ack(data, data_len, parse_ctx); - - case GSM48_MT_GMM_PTMSI_REALL_CMD: - return gprs_gb_parse_gmm_ptmsi_reall_cmd(data, data_len, parse_ctx); - - case GSM48_MT_GSM_ACT_PDP_REQ: - return gprs_gb_parse_gsm_act_pdp_req(data, data_len, parse_ctx); - - case GSM48_MT_GMM_ID_RESP: - return gprs_gb_parse_gmm_id_resp(data, data_len, parse_ctx); - - case GSM48_MT_GMM_DETACH_REQ: - return gprs_gb_parse_gmm_detach_req(data, data_len, parse_ctx); - - case GSM48_MT_GMM_DETACH_ACK: - parse_ctx->llc_msg_name = "DETACH_ACK"; - parse_ctx->invalidate_tlli = 1; - break; - - default: - LOGP(DLLC, LOGL_NOTICE, - "Unhandled GSM 04.08 message type %s for protocol discriminator %s.\n", - get_value_string(gprs_msgt_gmm_names, msg_type), get_value_string(gsm48_pdisc_names, pdisc)); - break; - }; - - return 1; -} - -int gprs_gb_parse_llc(uint8_t *llc, size_t llc_len, - struct gprs_gb_parse_context *parse_ctx) -{ - struct gprs_llc_hdr_parsed *ghp = &parse_ctx->llc_hdr_parsed; - int rc; - int fcs; - - /* parse LLC */ - rc = gprs_llc_hdr_parse(ghp, llc, llc_len); - gprs_llc_hdr_dump(ghp, NULL); - if (rc != 0) { - LOGP(DLLC, LOGL_NOTICE, "Error during LLC header parsing\n"); - return 0; - } - - fcs = gprs_llc_fcs(llc, ghp->crc_length); - LOGP(DLLC, LOGL_DEBUG, "Got LLC message, CRC: %06x (computed %06x)\n", - ghp->fcs, fcs); - - if (!ghp->data) - return 0; - - if (ghp->sapi != GPRS_SAPI_GMM) - return 1; - - if (ghp->cmd != GPRS_LLC_UI) - return 1; - - if (ghp->is_encrypted) { - parse_ctx->need_decryption = 1; - return 0; - } - - return gprs_gb_parse_dtap(ghp->data, ghp->data_len, parse_ctx); -} - -int gprs_gb_parse_bssgp(uint8_t *bssgp, size_t bssgp_len, - struct gprs_gb_parse_context *parse_ctx) -{ - struct bssgp_normal_hdr *bgph; - struct bssgp_ud_hdr *budh = NULL; - struct tlv_parsed *tp = &parse_ctx->bssgp_tp; - uint8_t pdu_type; - uint8_t *data; - size_t data_len; - int rc; - - if (bssgp_len < sizeof(struct bssgp_normal_hdr)) - return 0; - - bgph = (struct bssgp_normal_hdr *)bssgp; - pdu_type = bgph->pdu_type; - - if (pdu_type == BSSGP_PDUT_UL_UNITDATA || - pdu_type == BSSGP_PDUT_DL_UNITDATA) { - if (bssgp_len < sizeof(struct bssgp_ud_hdr)) - return 0; - budh = (struct bssgp_ud_hdr *)bssgp; - bgph = NULL; - data = budh->data; - data_len = bssgp_len - sizeof(*budh); - } else { - data = bgph->data; - data_len = bssgp_len - sizeof(*bgph); - } - - parse_ctx->pdu_type = pdu_type; - parse_ctx->bud_hdr = budh; - parse_ctx->bgp_hdr = bgph; - parse_ctx->bssgp_data = data; - parse_ctx->bssgp_data_len = data_len; - - if (bssgp_tlv_parse(tp, data, data_len) < 0) - return 0; - - if (budh) - parse_ctx->tlli_enc = (uint8_t *)&budh->tlli; - - if (TLVP_PRESENT(tp, BSSGP_IE_ROUTEING_AREA)) - parse_ctx->bssgp_raid_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA); - - if (TLVP_PRESENT(tp, BSSGP_IE_CELL_ID)) - parse_ctx->bssgp_raid_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_CELL_ID); - - if (TLVP_PRESENT(tp, BSSGP_IE_IMSI)) { - parse_ctx->imsi = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_IMSI); - parse_ctx->imsi_len = TLVP_LEN(tp, BSSGP_IE_IMSI); - } - - if (TLVP_PRESENT(tp, BSSGP_IE_TLLI)) { - if (parse_ctx->tlli_enc) - /* This is TLLI old, don't confuse it with TLLI current */ - parse_ctx->old_tlli_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_TLLI); - else - parse_ctx->tlli_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_TLLI); - } - - if (TLVP_PRESENT(tp, BSSGP_IE_TMSI) && pdu_type == BSSGP_PDUT_PAGING_PS) - parse_ctx->bssgp_ptmsi_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_TMSI); - - if (TLVP_PRESENT(tp, BSSGP_IE_LLC_PDU)) { - uint8_t *llc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_LLC_PDU); - size_t llc_len = TLVP_LEN(tp, BSSGP_IE_LLC_PDU); - - rc = gprs_gb_parse_llc(llc, llc_len, parse_ctx); - if (!rc) - return 0; - - parse_ctx->llc = llc; - parse_ctx->llc_len = llc_len; - } - - if (parse_ctx->tlli_enc) { - uint32_t tmp_tlli; - memcpy(&tmp_tlli, parse_ctx->tlli_enc, sizeof(tmp_tlli)); - parse_ctx->tlli = ntohl(tmp_tlli); - } - - if (parse_ctx->bssgp_raid_enc && parse_ctx->old_raid_enc && - memcmp(parse_ctx->bssgp_raid_enc, parse_ctx->old_raid_enc, 6) != 0) - parse_ctx->old_raid_is_foreign = 1; - - return 1; -} - -void gprs_gb_log_parse_context(int log_level, - struct gprs_gb_parse_context *parse_ctx, - const char *default_msg_name) -{ - const char *msg_name; - const char *sep = ""; - - if (!parse_ctx->tlli_enc && - !parse_ctx->ptmsi_enc && - !parse_ctx->new_ptmsi_enc && - !parse_ctx->bssgp_ptmsi_enc && - !parse_ctx->imsi) - return; - - msg_name = gprs_gb_message_name(parse_ctx, default_msg_name); - - if (parse_ctx->llc_msg_name) - msg_name = parse_ctx->llc_msg_name; - - LOGP(DGPRS, log_level, "%s: Got", msg_name); - - if (parse_ctx->tlli_enc) { - LOGPC(DGPRS, log_level, "%s TLLI %08x", sep, parse_ctx->tlli); - sep = ","; - } - - if (parse_ctx->old_tlli_enc) { - LOGPC(DGPRS, log_level, "%s old TLLI %02x%02x%02x%02x", sep, - parse_ctx->old_tlli_enc[0], - parse_ctx->old_tlli_enc[1], - parse_ctx->old_tlli_enc[2], - parse_ctx->old_tlli_enc[3]); - sep = ","; - } - - if (parse_ctx->bssgp_raid_enc) { - struct gprs_ra_id raid; - gsm48_parse_ra(&raid, parse_ctx->bssgp_raid_enc); - LOGPC(DGPRS, log_level, "%s BSSGP RAID %u-%u-%u-%u", sep, - raid.mcc, raid.mnc, raid.lac, raid.rac); - sep = ","; - } - - if (parse_ctx->raid_enc) { - struct gprs_ra_id raid; - gsm48_parse_ra(&raid, parse_ctx->raid_enc); - LOGPC(DGPRS, log_level, "%s RAID %u-%u-%u-%u", sep, - raid.mcc, raid.mnc, raid.lac, raid.rac); - sep = ","; - } - - if (parse_ctx->old_raid_enc) { - struct gprs_ra_id raid; - gsm48_parse_ra(&raid, parse_ctx->old_raid_enc); - LOGPC(DGPRS, log_level, "%s old RAID %u-%u-%u-%u", sep, - raid.mcc, raid.mnc, raid.lac, raid.rac); - sep = ","; - } - - if (parse_ctx->bssgp_ptmsi_enc) { - uint32_t ptmsi = GSM_RESERVED_TMSI; - gprs_parse_tmsi(parse_ctx->bssgp_ptmsi_enc, &ptmsi); - LOGPC(DGPRS, log_level, "%s BSSGP PTMSI %08x", sep, ptmsi); - sep = ","; - } - - if (parse_ctx->ptmsi_enc) { - uint32_t ptmsi = GSM_RESERVED_TMSI; - gprs_parse_tmsi(parse_ctx->ptmsi_enc, &ptmsi); - LOGPC(DGPRS, log_level, "%s PTMSI %08x", sep, ptmsi); - sep = ","; - } - - if (parse_ctx->new_ptmsi_enc) { - uint32_t new_ptmsi = GSM_RESERVED_TMSI; - gprs_parse_tmsi(parse_ctx->new_ptmsi_enc, &new_ptmsi); - LOGPC(DGPRS, log_level, "%s new PTMSI %08x", sep, new_ptmsi); - sep = ","; - } - - if (parse_ctx->imsi) { - char mi_buf[200]; - mi_buf[0] = '\0'; - gsm48_mi_to_string(mi_buf, sizeof(mi_buf), - parse_ctx->imsi, parse_ctx->imsi_len); - LOGPC(DGPRS, log_level, "%s IMSI %s", - sep, mi_buf); - sep = ","; - } - if (parse_ctx->invalidate_tlli) { - LOGPC(DGPRS, log_level, "%s invalidate", sep); - sep = ","; - } - if (parse_ctx->await_reattach) { - LOGPC(DGPRS, log_level, "%s re-attach", sep); - sep = ","; - } - - LOGPC(DGPRS, log_level, "\n"); -} - -const char *gprs_gb_message_name(const struct gprs_gb_parse_context *parse_ctx, - const char *default_msg_name) -{ - if (parse_ctx->llc_msg_name) - return parse_ctx->llc_msg_name; - - if (parse_ctx->g48_hdr) - return "GMM"; - - if (parse_ctx->llc) - return "LLC"; - - if (parse_ctx->bud_hdr) - return "BSSGP-UNITDATA"; - - if (parse_ctx->bgp_hdr) - return "BSSGP"; - - return "unknown"; -} diff --git a/openbsc/src/gprs/gprs_gmm.c b/openbsc/src/gprs/gprs_gmm.c deleted file mode 100644 index e6751db7c..000000000 --- a/openbsc/src/gprs/gprs_gmm.c +++ /dev/null @@ -1,2939 +0,0 @@ -/* GSM Mobile Radio Interface Layer 3 messages on the A-bis interface - * 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */ - -/* (C) 2009-2015 by Harald Welte <laforge@gnumonks.org> - * (C) 2010 by On-Waves - * - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <stdint.h> -#include <errno.h> -#include <stdbool.h> -#include <netinet/in.h> -#include <arpa/inet.h> -#include <netdb.h> - -#include <openssl/rand.h> - -#include "bscconfig.h" - -#include <openbsc/db.h> -#include <osmocom/core/msgb.h> -#include <osmocom/gsm/tlv.h> -#include <osmocom/gsm/gsm_utils.h> -#include <osmocom/core/signal.h> -#include <osmocom/core/talloc.h> -#include <osmocom/core/rate_ctr.h> -#include <osmocom/core/utils.h> -#include <osmocom/crypt/auth.h> -#include <osmocom/gsm/apn.h> -#include <osmocom/gsm/protocol/gsm_04_08_gprs.h> - -#include <osmocom/gprs/gprs_bssgp.h> - -#ifdef BUILD_IU -#include <osmocom/ranap/ranap_ies_defs.h> -#include <osmocom/ranap/ranap_msg_factory.h> -#endif - -#include <openbsc/debug.h> -#include <openbsc/gsm_data.h> -#include <openbsc/gsm_subscriber.h> -#include <openbsc/gsm_04_08.h> -#include <openbsc/paging.h> -#include <openbsc/transaction.h> -#include <openbsc/gprs_llc.h> -#include <openbsc/gprs_sgsn.h> -#include <openbsc/gprs_gmm.h> -#include <openbsc/gprs_utils.h> -#include <openbsc/gprs_subscriber.h> -#include <openbsc/sgsn.h> -#include <openbsc/signal.h> -#include <openbsc/iu.h> -#include <openbsc/gprs_sndcp.h> - -#include <pdp.h> - -#define PTMSI_ALLOC - -extern struct sgsn_instance *sgsn; - -static const struct tlv_definition gsm48_gmm_att_tlvdef = { - .def = { - [GSM48_IE_GMM_CIPH_CKSN] = { TLV_TYPE_FIXED, 1 }, - [GSM48_IE_GMM_TIMER_READY] = { TLV_TYPE_TV, 1 }, - [GSM48_IE_GMM_ALLOC_PTMSI] = { TLV_TYPE_TLV, 0 }, - [GSM48_IE_GMM_PTMSI_SIG] = { TLV_TYPE_FIXED, 3 }, - [GSM48_IE_GMM_AUTH_RAND] = { TLV_TYPE_FIXED, 16 }, - [GSM48_IE_GMM_AUTH_SRES] = { TLV_TYPE_FIXED, 4 }, - [GSM48_IE_GMM_AUTH_RES_EXT] = { TLV_TYPE_TLV, 0 }, - [GSM48_IE_GMM_AUTH_FAIL_PAR] = { TLV_TYPE_TLV, 0 }, - [GSM48_IE_GMM_IMEISV] = { TLV_TYPE_TLV, 0 }, - [GSM48_IE_GMM_DRX_PARAM] = { TLV_TYPE_FIXED, 2 }, - [GSM48_IE_GMM_MS_NET_CAPA] = { TLV_TYPE_TLV, 0 }, - [GSM48_IE_GMM_PDP_CTX_STATUS] = { TLV_TYPE_TLV, 0 }, - [GSM48_IE_GMM_PS_LCS_CAPA] = { TLV_TYPE_TLV, 0 }, - [GSM48_IE_GMM_GMM_MBMS_CTX_ST] = { TLV_TYPE_TLV, 0 }, - }, -}; - -static const struct tlv_definition gsm48_sm_att_tlvdef = { - .def = { - [GSM48_IE_GSM_APN] = { TLV_TYPE_TLV, 0 }, - [GSM48_IE_GSM_PROTO_CONF_OPT] = { TLV_TYPE_TLV, 0 }, - [GSM48_IE_GSM_PDP_ADDR] = { TLV_TYPE_TLV, 0 }, - [GSM48_IE_GSM_AA_TMR] = { TLV_TYPE_TV, 1 }, - [GSM48_IE_GSM_NAME_FULL] = { TLV_TYPE_TLV, 0 }, - [GSM48_IE_GSM_NAME_SHORT] = { TLV_TYPE_TLV, 0 }, - [GSM48_IE_GSM_TIMEZONE] = { TLV_TYPE_FIXED, 1 }, - [GSM48_IE_GSM_UTC_AND_TZ] = { TLV_TYPE_FIXED, 7 }, - [GSM48_IE_GSM_LSA_ID] = { TLV_TYPE_TLV, 0 }, - }, -}; - -static const struct value_string gprs_pmm_state_names[] = { - { PMM_DETACHED, "PMM DETACH" }, - { PMM_CONNECTED, "PMM CONNECTED" }, - { PMM_IDLE, "PMM IDLE" }, - { MM_IDLE, "MM IDLE" }, - { MM_READY, "MM READY" }, - { MM_STANDBY, "MM STANDBY" }, - { 0, NULL } -}; - -static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx); - -static void mmctx_change_gtpu_endpoints_to_sgsn(struct sgsn_mm_ctx *mm_ctx) -{ - struct sgsn_pdp_ctx *pdp; - llist_for_each_entry(pdp, &mm_ctx->pdp_list, list) { - sgsn_pdp_upd_gtp_u(pdp, - &sgsn->cfg.gtp_listenaddr.sin_addr, - sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); - } -} - -void mmctx_set_pmm_state(struct sgsn_mm_ctx *ctx, enum gprs_pmm_state state) -{ - if (ctx->ran_type != MM_CTX_T_UTRAN_Iu) - return; - - if (ctx->pmm_state == state) - return; - - LOGMMCTXP(LOGL_INFO, ctx, "Changing PMM state from %s to %s\n", - get_value_string(gprs_pmm_state_names, ctx->pmm_state), - get_value_string(gprs_pmm_state_names, state)); - - switch (state) { - case PMM_IDLE: - /* TODO: start RA Upd timer */ - mmctx_change_gtpu_endpoints_to_sgsn(ctx); - break; - case PMM_CONNECTED: - break; - default: - break; - } - - ctx->pmm_state = state; -} - -void mmctx_set_mm_state(struct sgsn_mm_ctx *ctx, enum gprs_pmm_state state) -{ - if (ctx->ran_type != MM_CTX_T_GERAN_Gb) - return; - - if (ctx->pmm_state == state) - return; - - LOGMMCTXP(LOGL_INFO, ctx, "Changing MM state from %s to %s\n", - get_value_string(gprs_pmm_state_names, ctx->pmm_state), - get_value_string(gprs_pmm_state_names, state)); - - ctx->pmm_state = state; -} - -#ifdef BUILD_IU -int sgsn_ranap_rab_ass_resp(struct sgsn_mm_ctx *ctx, RANAP_RAB_SetupOrModifiedItemIEs_t *setup_ies); -int sgsn_ranap_iu_event(struct ue_conn_ctx *ctx, enum iu_event_type type, void *data) -{ - struct sgsn_mm_ctx *mm; - int rc = -1; - - mm = sgsn_mm_ctx_by_ue_ctx(ctx); - if (!mm) { - LOGP(DRANAP, LOGL_NOTICE, "Cannot find mm ctx for IU event %i!\n", type); - return rc; - } - - switch (type) { - case IU_EVENT_RAB_ASSIGN: - rc = sgsn_ranap_rab_ass_resp(mm, (RANAP_RAB_SetupOrModifiedItemIEs_t *)data); - break; - case IU_EVENT_IU_RELEASE: - /* fall thru */ - case IU_EVENT_LINK_INVALIDATED: - /* Clean up ue_conn_ctx here */ - LOGMMCTXP(LOGL_INFO, mm, "IU release for imsi %s\n", mm->imsi); - if (mm->pmm_state == PMM_CONNECTED) - mmctx_set_pmm_state(mm, PMM_IDLE); - rc = 0; - break; - case IU_EVENT_SECURITY_MODE_COMPLETE: - /* Continue authentication here */ - mm->iu.ue_ctx->integrity_active = 1; - rc = gsm48_gmm_authorize(mm); - break; - default: - LOGP(DRANAP, LOGL_NOTICE, "Unknown event received: %i\n", type); - rc = -1; - break; - } - return rc; -} -#endif - - -/* Our implementation, should be kept in SGSN */ - -static void mmctx_timer_cb(void *_mm); - -static void mmctx_timer_start(struct sgsn_mm_ctx *mm, unsigned int T, - unsigned int seconds) -{ - if (osmo_timer_pending(&mm->timer)) - LOGMMCTXP(LOGL_ERROR, mm, "Starting MM timer %u while old " - "timer %u pending\n", T, mm->T); - mm->T = T; - mm->num_T_exp = 0; - - /* FIXME: we should do this only once ? */ - osmo_timer_setup(&mm->timer, mmctx_timer_cb, mm); - osmo_timer_schedule(&mm->timer, seconds, 0); -} - -static void mmctx_timer_stop(struct sgsn_mm_ctx *mm, unsigned int T) -{ - if (mm->T != T) - LOGMMCTXP(LOGL_ERROR, mm, "Stopping MM timer %u but " - "%u is running\n", T, mm->T); - osmo_timer_del(&mm->timer); -} - -time_t gprs_max_time_to_idle(void) -{ - return sgsn->cfg.timers.T3314 + (sgsn->cfg.timers.T3312 + 4 * 60); -} - -/* Send a message through the underlying layer. - * For param encryptable, see 3GPP TS 24.008 § 4.7.1.2 and - * gsm48_hdr_gmm_cipherable(). Pass false for not cipherable messages. */ -static int gsm48_gmm_sendmsg(struct msgb *msg, int command, - struct sgsn_mm_ctx *mm, bool encryptable) -{ - if (mm) { - rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_SIG_OUT]); -#ifdef BUILD_IU - if (mm->ran_type == MM_CTX_T_UTRAN_Iu) - return iu_tx(msg, GPRS_SAPI_GMM); -#endif - } - -#ifdef BUILD_IU - /* In Iu mode, msg->dst contains the ue_conn_ctx pointer, in Gb mode - * dst is empty. */ - /* FIXME: have a more explicit indicator for Iu messages */ - if (msg->dst) - return iu_tx(msg, GPRS_SAPI_GMM); -#endif - - /* caller needs to provide TLLI, BVCI and NSEI */ - return gprs_llc_tx_ui(msg, GPRS_SAPI_GMM, command, mm, encryptable); -} - -/* copy identifiers from old message to new message, this - * is required so lower layers can route it correctly */ -static void gmm_copy_id(struct msgb *msg, const struct msgb *old) -{ - msgb_tlli(msg) = msgb_tlli(old); - msgb_bvci(msg) = msgb_bvci(old); - msgb_nsei(msg) = msgb_nsei(old); - msg->dst = old->dst; -} - -/* Store BVCI/NSEI in MM context */ -static void msgid2mmctx(struct sgsn_mm_ctx *mm, const struct msgb *msg) -{ - mm->gb.bvci = msgb_bvci(msg); - mm->gb.nsei = msgb_nsei(msg); - /* In case a Iu connection is reconnected we need to update the ue ctx */ - mm->iu.ue_ctx = msg->dst; -} - -/* Store BVCI/NSEI in MM context */ -static void mmctx2msgid(struct msgb *msg, const struct sgsn_mm_ctx *mm) -{ - msgb_tlli(msg) = mm->gb.tlli; - msgb_bvci(msg) = mm->gb.bvci; - msgb_nsei(msg) = mm->gb.nsei; - msg->dst = mm->iu.ue_ctx; -} - -static void mm_ctx_cleanup_free(struct sgsn_mm_ctx *ctx, const char *log_text) -{ - LOGMMCTXP(LOGL_INFO, ctx, "Cleaning MM context due to %s\n", log_text); - - /* Mark MM state as deregistered */ - ctx->gmm_state = GMM_DEREGISTERED; - mmctx_set_pmm_state(ctx, PMM_DETACHED); - mmctx_set_pmm_state(ctx, MM_IDLE); - - sgsn_mm_ctx_cleanup_free(ctx); -} - -/* Chapter 9.4.18 */ -static int _tx_status(struct msgb *msg, uint8_t cause, - struct sgsn_mm_ctx *mmctx, int sm) -{ - struct gsm48_hdr *gh; - - /* MMCTX might be NULL! */ - - DEBUGP(DMM, "<- GPRS MM STATUS (cause: %s)\n", - get_value_string(gsm48_gmm_cause_names, cause)); - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); - if (sm) { - gh->proto_discr = GSM48_PDISC_SM_GPRS; - gh->msg_type = GSM48_MT_GSM_STATUS; - } else { - gh->proto_discr = GSM48_PDISC_MM_GPRS; - gh->msg_type = GSM48_MT_GMM_STATUS; - } - gh->data[0] = cause; - - return gsm48_gmm_sendmsg(msg, 0, mmctx, true); -} - -static int gsm48_tx_gmm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 GMM STATUS"); - - mmctx2msgid(msg, mmctx); - return _tx_status(msg, cause, mmctx, 0); -} - -static int gsm48_tx_sm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SM STATUS"); - - mmctx2msgid(msg, mmctx); - return _tx_status(msg, cause, mmctx, 1); -} - -static int _tx_detach_req(struct msgb *msg, uint8_t detach_type, uint8_t cause, - struct sgsn_mm_ctx *mmctx) -{ - struct gsm48_hdr *gh; - - /* MMCTX might be NULL! */ - - DEBUGP(DMM, "<- GPRS MM DETACH REQ (type: %s, cause: %s)\n", - get_value_string(gprs_det_t_mt_strs, detach_type), - get_value_string(gsm48_gmm_cause_names, cause)); - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); - - gh->proto_discr = GSM48_PDISC_MM_GPRS; - gh->msg_type = GSM48_MT_GMM_DETACH_REQ; - gh->data[0] = detach_type & 0x07; - - msgb_tv_put(msg, GSM48_IE_GMM_CAUSE, cause); - - return gsm48_gmm_sendmsg(msg, 0, mmctx, true); -} - -static int gsm48_tx_gmm_detach_req(struct sgsn_mm_ctx *mmctx, - uint8_t detach_type, uint8_t cause) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DET REQ"); - - mmctx2msgid(msg, mmctx); - return _tx_detach_req(msg, detach_type, cause, mmctx); -} - -static int gsm48_tx_gmm_detach_req_oldmsg(struct msgb *oldmsg, - uint8_t detach_type, uint8_t cause) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DET OLD"); - - gmm_copy_id(msg, oldmsg); - return _tx_detach_req(msg, detach_type, cause, NULL); -} - -static struct gsm48_qos default_qos = { - .delay_class = 4, /* best effort */ - .reliab_class = GSM48_QOS_RC_LLC_UN_RLC_ACK_DATA_PROT, - .peak_tput = GSM48_QOS_PEAK_TPUT_32000bps, - .preced_class = GSM48_QOS_PC_NORMAL, - .mean_tput = GSM48_QOS_MEAN_TPUT_BEST_EFFORT, - .traf_class = GSM48_QOS_TC_INTERACTIVE, - .deliv_order = GSM48_QOS_DO_UNORDERED, - .deliv_err_sdu = GSM48_QOS_ERRSDU_YES, - .max_sdu_size = GSM48_QOS_MAXSDU_1520, - .max_bitrate_up = GSM48_QOS_MBRATE_63k, - .max_bitrate_down = GSM48_QOS_MBRATE_63k, - .resid_ber = GSM48_QOS_RBER_5e_2, - .sdu_err_ratio = GSM48_QOS_SERR_1e_2, - .handling_prio = 3, - .xfer_delay = 0x10, /* 200ms */ - .guar_bitrate_up = GSM48_QOS_MBRATE_0k, - .guar_bitrate_down = GSM48_QOS_MBRATE_0k, - .sig_ind = 0, /* not optimised for signalling */ - .max_bitrate_down_ext = 0, /* use octet 9 */ - .guar_bitrate_down_ext = 0, /* use octet 13 */ -}; - -/* Chapter 9.4.2: Attach accept */ -static int gsm48_tx_gmm_att_ack(struct sgsn_mm_ctx *mm) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ATT ACK"); - struct gsm48_hdr *gh; - struct gsm48_attach_ack *aa; - uint8_t *mid; -#if 0 - uint8_t *ptsig; -#endif - - LOGMMCTXP(LOGL_INFO, mm, "<- GPRS ATTACH ACCEPT (new P-TMSI=0x%08x)\n", mm->p_tmsi); - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ATTACH_ACKED]); - - mmctx2msgid(msg, mm); - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); - gh->proto_discr = GSM48_PDISC_MM_GPRS; - gh->msg_type = GSM48_MT_GMM_ATTACH_ACK; - - aa = (struct gsm48_attach_ack *) msgb_put(msg, sizeof(*aa)); - aa->force_stby = 0; /* not indicated */ - aa->att_result = 1; /* GPRS only */ - aa->ra_upd_timer = gprs_secs_to_tmr_floor(sgsn->cfg.timers.T3312); - aa->radio_prio = 4; /* lowest */ - gsm48_construct_ra(aa->ra_id.digits, &mm->ra); - -#if 0 - /* Optional: P-TMSI signature */ - msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); - ptsig = msgb_put(msg, 3); - ptsig[0] = mm->p_tmsi_sig >> 16; - ptsig[1] = mm->p_tmsi_sig >> 8; - ptsig[2] = mm->p_tmsi_sig & 0xff; - -#endif - /* Optional: Negotiated Ready timer value - * (fixed 44s, default value, GSM 04.08, table 11.4a) to safely limit - * the inactivity time READY->STANDBY. - */ - msgb_tv_put(msg, GSM48_IE_GMM_TIMER_READY, - gprs_secs_to_tmr_floor(sgsn->cfg.timers.T3314)); - -#ifdef PTMSI_ALLOC - /* Optional: Allocated P-TMSI */ - mid = msgb_put(msg, GSM48_MID_TMSI_LEN); - gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); - mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; -#endif - - /* Optional: MS-identity (combined attach) */ - /* Optional: GMM cause (partial attach result for combined attach) */ - - return gsm48_gmm_sendmsg(msg, 0, mm, true); -} - -/* Chapter 9.4.5: Attach reject */ -static int _tx_gmm_att_rej(struct msgb *msg, uint8_t gmm_cause, - const struct sgsn_mm_ctx *mm) -{ - struct gsm48_hdr *gh; - - LOGMMCTXP(LOGL_NOTICE, mm, "<- GPRS ATTACH REJECT: %s\n", - get_value_string(gsm48_gmm_cause_names, gmm_cause)); - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ATTACH_REJECTED]); - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); - gh->proto_discr = GSM48_PDISC_MM_GPRS; - gh->msg_type = GSM48_MT_GMM_ATTACH_REJ; - gh->data[0] = gmm_cause; - - return gsm48_gmm_sendmsg(msg, 0, NULL, false); -} -static int gsm48_tx_gmm_att_rej_oldmsg(const struct msgb *old_msg, - uint8_t gmm_cause) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ATT REJ OLD"); - gmm_copy_id(msg, old_msg); - return _tx_gmm_att_rej(msg, gmm_cause, NULL); -} -static int gsm48_tx_gmm_att_rej(struct sgsn_mm_ctx *mm, - uint8_t gmm_cause) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ATT REJ"); - mmctx2msgid(msg, mm); - return _tx_gmm_att_rej(msg, gmm_cause, mm); -} - -/* Chapter 9.4.6.2 Detach accept */ -static int _tx_detach_ack(struct msgb *msg, uint8_t force_stby, - struct sgsn_mm_ctx *mm) -{ - struct gsm48_hdr *gh; - - /* MMCTX might be NULL! */ - - DEBUGP(DMM, "<- GPRS MM DETACH ACC (force-standby: %d)\n", force_stby); - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_DETACH_ACKED]); - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); - gh->proto_discr = GSM48_PDISC_MM_GPRS; - gh->msg_type = GSM48_MT_GMM_DETACH_ACK; - gh->data[0] = force_stby; - - return gsm48_gmm_sendmsg(msg, 0, mm, true); -} - -static int gsm48_tx_gmm_det_ack(struct sgsn_mm_ctx *mm, uint8_t force_stby) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DET ACK"); - - mmctx2msgid(msg, mm); - return _tx_detach_ack(msg, force_stby, mm); -} - -static int gsm48_tx_gmm_det_ack_oldmsg(struct msgb *oldmsg, uint8_t force_stby) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DET ACK OLD"); - - gmm_copy_id(msg, oldmsg); - return _tx_detach_ack(msg, force_stby, NULL); -} - -/* Transmit Chapter 9.4.12 Identity Request */ -static int gsm48_tx_gmm_id_req(struct sgsn_mm_ctx *mm, uint8_t id_type) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ID REQ"); - struct gsm48_hdr *gh; - - LOGMMCTXP(LOGL_DEBUG, mm, "<- GPRS IDENTITY REQUEST: mi_type=%s\n", - gsm48_mi_type_name(id_type)); - - mmctx2msgid(msg, mm); - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); - gh->proto_discr = GSM48_PDISC_MM_GPRS; - gh->msg_type = GSM48_MT_GMM_ID_REQ; - /* 10.5.5.9 ID type 2 + identity type and 10.5.5.7 'force to standby' IE */ - gh->data[0] = id_type & 0xf; - - return gsm48_gmm_sendmsg(msg, 1, mm, false); -} - -/* determine if the MS/UE supports R99 or later */ -static bool mmctx_is_r99(const struct sgsn_mm_ctx *mm) -{ - if (mm->ms_network_capa.len < 1) - return false; - if (mm->ms_network_capa.buf[0] & 0x01) - return true; - return false; -} - -/* 3GPP TS 24.008 Section 9.4.9: Authentication and Ciphering Request */ -static int gsm48_tx_gmm_auth_ciph_req(struct sgsn_mm_ctx *mm, - const struct osmo_auth_vector *vec, - uint8_t key_seq, bool force_standby) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 AUTH CIPH REQ"); - struct gsm48_hdr *gh; - struct gsm48_auth_ciph_req *acreq; - uint8_t *m_rand, *m_cksn, rbyte; - - LOGMMCTXP(LOGL_INFO, mm, "<- GPRS AUTH AND CIPHERING REQ (rand = %s", - osmo_hexdump(vec->rand, sizeof(vec->rand))); - if (mmctx_is_r99(mm) && vec - && (vec->auth_types & OSMO_AUTH_TYPE_UMTS)) { - LOGPC(DMM, LOGL_INFO, ", autn = %s)\n", - osmo_hexdump(vec->autn, sizeof(vec->autn))); - } else - LOGPC(DMM, LOGL_INFO, ")\n"); - - mmctx2msgid(msg, mm); - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); - gh->proto_discr = GSM48_PDISC_MM_GPRS; - gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REQ; - - acreq = (struct gsm48_auth_ciph_req *) msgb_put(msg, sizeof(*acreq)); - acreq->ciph_alg = mm->ciph_algo & 0xf; - /* § 10.5.5.10: */ - acreq->imeisv_req = 0x1; - /* § 10.5.5.7: */ - acreq->force_stby = force_standby; - /* 3GPP TS 24.008 § 10.5.5.19: */ - if (RAND_bytes(&rbyte, 1) != 1) { - LOGP(DMM, LOGL_NOTICE, "RAND_bytes failed for A&C ref, falling " - "back to rand()\n"); - acreq->ac_ref_nr = rand(); - } else - acreq->ac_ref_nr = rbyte; - mm->ac_ref_nr_used = acreq->ac_ref_nr; - - /* Only if authentication is requested we need to set RAND + CKSN */ - if (vec) { - m_rand = msgb_put(msg, sizeof(vec->rand) + 1); - m_rand[0] = GSM48_IE_GMM_AUTH_RAND; - memcpy(m_rand + 1, vec->rand, sizeof(vec->rand)); - - /* § 10.5.1.2: */ - m_cksn = msgb_put(msg, 1); - m_cksn[0] = (GSM48_IE_GMM_CIPH_CKSN << 4) | (key_seq & 0x07); - - /* A Release99 or higher MS/UE must be able to handle - * the optional AUTN IE. If a classic GSM SIM is - * inserted, it will simply ignore AUTN and just use - * RAND */ - if (mmctx_is_r99(mm) && - (vec->auth_types & OSMO_AUTH_TYPE_UMTS)) { - msgb_tlv_put(msg, GSM48_IE_GMM_AUTN, - sizeof(vec->autn), vec->autn); - } - } - - return gsm48_gmm_sendmsg(msg, 1, mm, false); -} - -/* Section 9.4.11: Authentication and Ciphering Reject */ -static int gsm48_tx_gmm_auth_ciph_rej(struct sgsn_mm_ctx *mm) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 AUTH CIPH REJ"); - struct gsm48_hdr *gh; - - LOGMMCTXP(LOGL_NOTICE, mm, "<- GPRS AUTH AND CIPH REJECT\n"); - - mmctx2msgid(msg, mm); - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); - gh->proto_discr = GSM48_PDISC_MM_GPRS; - gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REJ; - - return gsm48_gmm_sendmsg(msg, 0, mm, false); -} - -/* check if the received authentication response matches */ -static bool check_auth_resp(struct sgsn_mm_ctx *ctx, - bool is_utran, - const struct osmo_auth_vector *vec, - const uint8_t *res, uint8_t res_len) -{ - const uint8_t *expect_res; - uint8_t expect_res_len; - enum osmo_sub_auth_type expect_type; - const char *expect_str; - - if (!vec) - return true; /* really!? */ - - /* On UTRAN (3G) we always expect UMTS AKA. On GERAN (2G) we sent AUTN - * and expect UMTS AKA if there is R99 capability and our vector - * supports UMTS AKA, otherwise we expect GSM AKA. */ - if (is_utran - || (mmctx_is_r99(ctx) && (vec->auth_types & OSMO_AUTH_TYPE_UMTS))) { - expect_type = OSMO_AUTH_TYPE_UMTS; - expect_str = "UMTS RES"; - expect_res = vec->res; - expect_res_len = vec->res_len; - } else { - expect_type = OSMO_AUTH_TYPE_GSM; - expect_str = "GSM SRES"; - expect_res = vec->sres; - expect_res_len = sizeof(vec->sres); - } - - if (!(vec->auth_types & expect_type)) { - LOGMMCTXP(LOGL_ERROR, ctx, "Auth error: auth vector does" - " not provide the expected auth type:" - " expected %s = 0x%x, auth_types are 0x%x\n", - expect_str, expect_type, vec->auth_types); - return false; - } - - if (!res) - goto auth_mismatch; - - if (res_len != expect_res_len) - goto auth_mismatch; - - if (memcmp(res, expect_res, res_len) != 0) - goto auth_mismatch; - - /* Authorized! */ - return true; - -auth_mismatch: - LOGMMCTXP(LOGL_ERROR, ctx, "Auth mismatch: expected %s = %s\n", - expect_str, osmo_hexdump_nospc(expect_res, expect_res_len)); - return false; -} - -/* Section 9.4.10: Authentication and Ciphering Response */ -static int gsm48_rx_gmm_auth_ciph_resp(struct sgsn_mm_ctx *ctx, - struct msgb *msg) -{ - struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); - struct gsm48_auth_ciph_resp *acr = (struct gsm48_auth_ciph_resp *)gh->data; - struct tlv_parsed tp; - struct gsm_auth_tuple *at; - const char *res_name = "(no response)"; - uint8_t res[16]; - uint8_t res_len; - int rc; - - LOGMMCTXP(LOGL_INFO, ctx, "-> GPRS AUTH AND CIPH RESPONSE\n"); - - if (ctx->auth_triplet.key_seq == GSM_KEY_SEQ_INVAL) { - LOGMMCTXP(LOGL_NOTICE, ctx, - "Unexpected Auth & Ciph Response (ignored)\n"); - return 0; - } - - if (acr->ac_ref_nr != ctx->ac_ref_nr_used) { - LOGMMCTXP(LOGL_NOTICE, ctx, "Reference mismatch for Auth & Ciph" - " Response: %u received, %u expected\n", - acr->ac_ref_nr, ctx->ac_ref_nr_used); - return 0; - } - - /* Stop T3360 */ - mmctx_timer_stop(ctx, 3360); - - tlv_parse(&tp, &gsm48_gmm_att_tlvdef, acr->data, - (msg->data + msg->len) - acr->data, 0, 0); - - if (!TLVP_PRESENT(&tp, GSM48_IE_GMM_AUTH_SRES) || - !TLVP_PRESENT(&tp, GSM48_IE_GMM_IMEISV) || - TLVP_LEN(&tp,GSM48_IE_GMM_AUTH_SRES) != 4) { - /* TODO: missing mandatory IE, return STATUS or REJ? */ - LOGMMCTXP(LOGL_ERROR, ctx, "Missing mandantory IE\n"); - return -EINVAL; - } - - /* Start with the good old 4-byte SRES */ - memcpy(res, TLVP_VAL(&tp, GSM48_IE_GMM_AUTH_SRES), 4); - res_len = 4; - res_name = "GSM SRES"; - - /* Append extended RES as part of UMTS AKA, if any */ - if (TLVP_PRESENT(&tp, GSM48_IE_GMM_AUTH_RES_EXT)) { - unsigned int l = TLVP_LEN(&tp, GSM48_IE_GMM_AUTH_RES_EXT); - if (l > sizeof(res)-4) - l = sizeof(res)-4; - memcpy(res+4, TLVP_VAL(&tp, GSM48_IE_GMM_AUTH_RES_EXT), l); - res_len += l; - res_name = "UMTS RES"; - } - - at = &ctx->auth_triplet; - - LOGMMCTXP(LOGL_DEBUG, ctx, "checking auth: received %s = %s\n", - res_name, osmo_hexdump(res, res_len)); - rc = check_auth_resp(ctx, false, &at->vec, res, res_len); - if (!rc) { - rc = gsm48_tx_gmm_auth_ciph_rej(ctx); - mm_ctx_cleanup_free(ctx, "GPRS AUTH AND CIPH REJECT"); - return rc; - } - - ctx->is_authenticated = 1; - - if (ctx->ran_type == MM_CTX_T_UTRAN_Iu) - ctx->iu.new_key = 1; - - /* FIXME: enable LLC cipheirng */ - - /* Check if we can let the mobile station enter */ - return gsm48_gmm_authorize(ctx); -} - -/* Section 9.4.10: Authentication and Ciphering Failure */ -static int gsm48_rx_gmm_auth_ciph_fail(struct sgsn_mm_ctx *ctx, - struct msgb *msg) -{ - struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); - struct tlv_parsed tp; - const uint8_t gmm_cause = gh->data[0]; - const uint8_t *auts; - int rc; - - LOGMMCTXP(LOGL_INFO, ctx, "-> GPRS AUTH AND CIPH FAILURE (cause = %s)\n", - get_value_string(gsm48_gmm_cause_names, gmm_cause)); - - tlv_parse(&tp, &gsm48_gmm_att_tlvdef, gh->data+1, msg->len - 1, 0, 0); - - /* Only if GMM cause is present and the AUTS is provided, we can - * start re-sync procedure */ - if (gmm_cause == GMM_CAUSE_SYNC_FAIL && - TLVP_PRESENT(&tp, GSM48_IE_GMM_AUTH_FAIL_PAR)) { - if (TLVP_LEN(&tp, GSM48_IE_GMM_AUTH_FAIL_PAR) != 14) { - LOGMMCTXP(LOGL_ERROR, ctx, "AUTS IE has wrong size:" - " expected %d, got %u\n", 14, - TLVP_LEN(&tp, GSM48_IE_GMM_AUTH_FAIL_PAR)); - return -EINVAL; - } - auts = TLVP_VAL(&tp, GSM48_IE_GMM_AUTH_FAIL_PAR); - - LOGMMCTXP(LOGL_INFO, ctx, - "R99 AUTHENTICATION SYNCH (AUTS = %s)\n", - osmo_hexdump_nospc(auts, 14)); - - /* make sure we'll refresh the auth_triplet in - * sgsn_auth_update() */ - ctx->auth_triplet.key_seq = GSM_KEY_SEQ_INVAL; - - /* make sure we'll retry authentication after the resync */ - ctx->auth_state = SGSN_AUTH_UMTS_RESYNC; - - /* Send AUTS to HLR and wait for new Auth Info Result */ - rc = gprs_subscr_request_auth_info(ctx, auts, - ctx->auth_triplet.vec.rand); - if (!rc) - return 0; - /* on error, fall through to send a reject */ - LOGMMCTXP(LOGL_ERROR, ctx, - "Sending AUTS to HLR failed (rc = %d)\n", rc); - } - - LOGMMCTXP(LOGL_NOTICE, ctx, "Authentication failed\n"); - rc = gsm48_tx_gmm_auth_ciph_rej(ctx); - mm_ctx_cleanup_free(ctx, "GPRS AUTH FAILURE"); - return rc; -} - -static void extract_subscr_msisdn(struct sgsn_mm_ctx *ctx) -{ - struct gsm_mncc_number called; - uint8_t msisdn[sizeof(ctx->subscr->sgsn_data->msisdn) + 1]; - - /* Convert MSISDN from encoded to string.. */ - if (!ctx->subscr) - return; - - if (ctx->subscr->sgsn_data->msisdn_len < 1) - return; - - /* prepare the data for the decoder */ - memset(&called, 0, sizeof(called)); - msisdn[0] = ctx->subscr->sgsn_data->msisdn_len; - memcpy(&msisdn[1], ctx->subscr->sgsn_data->msisdn, - ctx->subscr->sgsn_data->msisdn_len); - - /* decode the string now */ - gsm48_decode_called(&called, msisdn); - - /* Prepend a '+' for international numbers */ - if (called.plan == 1 && called.type == 1) { - ctx->msisdn[0] = '+'; - osmo_strlcpy(&ctx->msisdn[1], called.number, - sizeof(ctx->msisdn)); - } else { - osmo_strlcpy(ctx->msisdn, called.number, sizeof(ctx->msisdn)); - } -} - -static void extract_subscr_hlr(struct sgsn_mm_ctx *ctx) -{ - struct gsm_mncc_number called; - uint8_t hlr_number[sizeof(ctx->subscr->sgsn_data->hlr) + 1]; - - if (!ctx->subscr) - return; - - if (ctx->subscr->sgsn_data->hlr_len < 1) - return; - - /* prepare the data for the decoder */ - memset(&called, 0, sizeof(called)); - hlr_number[0] = ctx->subscr->sgsn_data->hlr_len; - memcpy(&hlr_number[1], ctx->subscr->sgsn_data->hlr, - ctx->subscr->sgsn_data->hlr_len); - - /* decode the string now */ - gsm48_decode_called(&called, hlr_number); - - if (called.plan != 1) { - LOGMMCTXP(LOGL_ERROR, ctx, - "Numbering plan(%d) not allowed\n", - called.plan); - return; - } - - if (called.type != 1) { - LOGMMCTXP(LOGL_ERROR, ctx, - "Numbering type(%d) not allowed\n", - called.type); - return; - } - - osmo_strlcpy(ctx->hlr, called.number, sizeof(ctx->hlr)); -} - -#ifdef BUILD_IU -/* Chapter 9.4.21: Service accept */ -static int gsm48_tx_gmm_service_ack(struct sgsn_mm_ctx *mm) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SERVICE ACK"); - struct gsm48_hdr *gh; - - LOGMMCTXP(LOGL_INFO, mm, "<- GPRS SERVICE ACCEPT (P-TMSI=0x%08x)\n", mm->p_tmsi); - - mmctx2msgid(msg, mm); - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); - gh->proto_discr = GSM48_PDISC_MM_GPRS; - gh->msg_type = GSM48_MT_GMM_SERVICE_ACK; - - /* Optional: PDP context status */ - /* Optional: MBMS context status */ - - return gsm48_gmm_sendmsg(msg, 0, mm, false); -} -#endif - -/* Chapter 9.4.22: Service reject */ -static int _tx_gmm_service_rej(struct msgb *msg, uint8_t gmm_cause, - const struct sgsn_mm_ctx *mm) -{ - struct gsm48_hdr *gh; - - LOGMMCTXP(LOGL_NOTICE, mm, "<- GPRS SERVICE REJECT: %s\n", - get_value_string(gsm48_gmm_cause_names, gmm_cause)); - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); - gh->proto_discr = GSM48_PDISC_MM_GPRS; - gh->msg_type = GSM48_MT_GMM_SERVICE_REJ; - gh->data[0] = gmm_cause; - - return gsm48_gmm_sendmsg(msg, 0, NULL, true); -} -static int gsm48_tx_gmm_service_rej_oldmsg(const struct msgb *old_msg, - uint8_t gmm_cause) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SERVICE REJ OLD"); - gmm_copy_id(msg, old_msg); - return _tx_gmm_service_rej(msg, gmm_cause, NULL); -} -#if 0 --- currently unused -- -static int gsm48_tx_gmm_service_rej(struct sgsn_mm_ctx *mm, - uint8_t gmm_cause) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SERVICE REJ"); - mmctx2msgid(msg, mm); - return _tx_gmm_service_rej(msg, gmm_cause, mm); -} -#endif - -static int gsm48_tx_gmm_ra_upd_ack(struct sgsn_mm_ctx *mm); - -#ifdef BUILD_IU -void activate_pdp_rabs(struct sgsn_mm_ctx *ctx) -{ - /* Send RAB activation requests for all PDP contexts */ - struct sgsn_pdp_ctx *pdp; - llist_for_each_entry(pdp, &ctx->pdp_list, list) { - iu_rab_act_ps(pdp->nsapi, pdp, 1); - } -} -#endif - -/* Check if we can already authorize a subscriber */ -static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx) -{ -#ifdef BUILD_IU - int rc; -#endif -#ifndef PTMSI_ALLOC - struct sgsn_signal_data sig_data; -#endif - - /* Request IMSI and IMEI from the MS if they are unknown */ - if (!strlen(ctx->imei)) { - ctx->t3370_id_type = GSM_MI_TYPE_IMEI; - mmctx_timer_start(ctx, 3370, sgsn->cfg.timers.T3370); - return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMEI); - } - if (!strlen(ctx->imsi)) { - ctx->t3370_id_type = GSM_MI_TYPE_IMSI; - mmctx_timer_start(ctx, 3370, sgsn->cfg.timers.T3370); - return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMSI); - } - - /* All information required for authentication is available */ - ctx->t3370_id_type = GSM_MI_TYPE_NONE; - - if (ctx->auth_state == SGSN_AUTH_UNKNOWN) { - /* Request authorization, this leads to a call to - * sgsn_auth_update which in turn calls - * gsm0408_gprs_access_granted or gsm0408_gprs_access_denied */ - - sgsn_auth_request(ctx); - /* Note that gsm48_gmm_authorize can be called recursively via - * sgsn_auth_request iff ctx->auth_info changes to AUTH_ACCEPTED - */ - return 0; - } - - if (ctx->auth_state == SGSN_AUTH_AUTHENTICATE && !ctx->is_authenticated) { - struct gsm_auth_tuple *at = &ctx->auth_triplet; - - mmctx_timer_start(ctx, 3360, sgsn->cfg.timers.T3360); - return gsm48_tx_gmm_auth_ciph_req(ctx, &at->vec, at->key_seq, - false); - } - - if (ctx->auth_state == SGSN_AUTH_AUTHENTICATE && ctx->is_authenticated && - ctx->auth_triplet.key_seq != GSM_KEY_SEQ_INVAL) { - /* Check again for authorization */ - sgsn_auth_request(ctx); - return 0; - } - - if (ctx->auth_state != SGSN_AUTH_ACCEPTED) { - LOGMMCTXP(LOGL_NOTICE, ctx, - "authorization is denied, aborting procedure\n"); - return -EACCES; - } - - /* The MS is authorized */ -#ifdef BUILD_IU - if (ctx->ran_type == MM_CTX_T_UTRAN_Iu && !ctx->iu.ue_ctx->integrity_active) { - rc = iu_tx_sec_mode_cmd(ctx->iu.ue_ctx, &ctx->auth_triplet, 0, ctx->iu.new_key); - ctx->iu.new_key = 0; - return rc; - } -#endif - - switch (ctx->pending_req) { - case 0: - LOGMMCTXP(LOGL_INFO, ctx, - "no pending request, authorization completed\n"); - break; - case GSM48_MT_GMM_ATTACH_REQ: - ctx->pending_req = 0; - - extract_subscr_msisdn(ctx); - extract_subscr_hlr(ctx); -#ifdef PTMSI_ALLOC - /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ - mmctx_timer_start(ctx, 3350, sgsn->cfg.timers.T3350); - ctx->t3350_mode = GMM_T3350_MODE_ATT; -#else - memset(&sig_data, 0, sizeof(sig_data)); - sig_data.mm = mmctx; - osmo_signal_dispatch(SS_SGSN, S_SGSN_ATTACH, &sig_data); - ctx->gmm_state = GMM_REGISTERED_NORMAL; -#endif - - return gsm48_tx_gmm_att_ack(ctx); -#ifdef BUILD_IU - case GSM48_MT_GMM_SERVICE_REQ: - ctx->pending_req = 0; - mmctx_set_pmm_state(ctx, PMM_CONNECTED); - rc = gsm48_tx_gmm_service_ack(ctx); - - if (ctx->iu.service.type != GPRS_SERVICE_T_SIGNALLING) - activate_pdp_rabs(ctx); - - return rc; -#endif - case GSM48_MT_GMM_RA_UPD_REQ: - ctx->pending_req = 0; - /* Send RA UPDATE ACCEPT */ - return gsm48_tx_gmm_ra_upd_ack(ctx); - - default: - LOGMMCTXP(LOGL_ERROR, ctx, - "only Attach Request is supported yet, " - "got request type %u\n", ctx->pending_req); - break; - } - - return 0; -} - -void gsm0408_gprs_authenticate(struct sgsn_mm_ctx *ctx) -{ - ctx->is_authenticated = 0; - - gsm48_gmm_authorize(ctx); -} - -void gsm0408_gprs_access_granted(struct sgsn_mm_ctx *ctx) -{ - switch (ctx->gmm_state) { - case GMM_COMMON_PROC_INIT: - LOGMMCTXP(LOGL_NOTICE, ctx, - "Authorized, continuing procedure, IMSI=%s\n", - ctx->imsi); - /* Continue with the authorization */ - gsm48_gmm_authorize(ctx); - break; - default: - LOGMMCTXP(LOGL_INFO, ctx, - "Authorized, ignored, IMSI=%s\n", - ctx->imsi); - } -} - -void gsm0408_gprs_access_denied(struct sgsn_mm_ctx *ctx, int gmm_cause) -{ - if (gmm_cause == SGSN_ERROR_CAUSE_NONE) - gmm_cause = GMM_CAUSE_GPRS_NOTALLOWED; - - switch (ctx->gmm_state) { - case GMM_COMMON_PROC_INIT: - LOGMMCTXP(LOGL_NOTICE, ctx, - "Not authorized, rejecting ATTACH REQUEST " - "with cause '%s' (%d)\n", - get_value_string(gsm48_gmm_cause_names, gmm_cause), - gmm_cause); - gsm48_tx_gmm_att_rej(ctx, gmm_cause); - mm_ctx_cleanup_free(ctx, "GPRS ATTACH REJECT"); - break; - case GMM_REGISTERED_NORMAL: - case GMM_REGISTERED_SUSPENDED: - LOGMMCTXP(LOGL_NOTICE, ctx, - "Authorization lost, detaching " - "with cause '%s' (%d)\n", - get_value_string(gsm48_gmm_cause_names, gmm_cause), - gmm_cause); - gsm48_tx_gmm_detach_req( - ctx, GPRS_DET_T_MT_REATT_NOTREQ, gmm_cause); - - mm_ctx_cleanup_free(ctx, "auth lost"); - break; - default: - LOGMMCTXP(LOGL_INFO, ctx, - "Authorization lost, cause is '%s' (%d)\n", - get_value_string(gsm48_gmm_cause_names, gmm_cause), - gmm_cause); - mm_ctx_cleanup_free(ctx, "auth lost"); - } -} - -void gsm0408_gprs_access_cancelled(struct sgsn_mm_ctx *ctx, int gmm_cause) -{ - if (gmm_cause != SGSN_ERROR_CAUSE_NONE) { - LOGMMCTXP(LOGL_INFO, ctx, - "Cancelled with cause '%s' (%d), deleting context\n", - get_value_string(gsm48_gmm_cause_names, gmm_cause), - gmm_cause); - gsm0408_gprs_access_denied(ctx, gmm_cause); - return; - } - - LOGMMCTXP(LOGL_INFO, ctx, "Cancelled, deleting context silently\n"); - mm_ctx_cleanup_free(ctx, "access cancelled"); -} - -/* Parse Chapter 9.4.13 Identity Response */ -static int gsm48_rx_gmm_id_resp(struct sgsn_mm_ctx *ctx, struct msgb *msg) -{ - struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); - uint8_t mi_type = gh->data[1] & GSM_MI_TYPE_MASK; - char mi_string[GSM48_MI_SIZE]; - - gsm48_mi_to_string(mi_string, sizeof(mi_string), &gh->data[1], gh->data[0]); - if (!ctx) { - DEBUGP(DMM, "from unknown TLLI 0x%08x?!? This should not happen\n", msgb_tlli(msg)); - return -EINVAL; - } - - LOGMMCTXP(LOGL_DEBUG, ctx, "-> GMM IDENTITY RESPONSE: MI(%s)=%s\n", - gsm48_mi_type_name(mi_type), mi_string); - - if (ctx->t3370_id_type == GSM_MI_TYPE_NONE) { - LOGMMCTXP(LOGL_NOTICE, ctx, - "Got unexpected IDENTITY RESPONSE: MI(%s)=%s, " - "ignoring message\n", - gsm48_mi_type_name(mi_type), mi_string); - return -EINVAL; - } - - if (mi_type == ctx->t3370_id_type) - mmctx_timer_stop(ctx, 3370); - - switch (mi_type) { - case GSM_MI_TYPE_IMSI: - /* we already have a mm context with current TLLI, but no - * P-TMSI / IMSI yet. What we now need to do is to fill - * this initial context with data from the HLR */ - if (strlen(ctx->imsi) == 0) { - /* Check if we already have a MM context for this IMSI */ - struct sgsn_mm_ctx *ictx; - ictx = sgsn_mm_ctx_by_imsi(mi_string); - if (ictx) { - /* Handle it like in gsm48_rx_gmm_det_req, - * except that no messages are sent to the BSS */ - - LOGMMCTXP(LOGL_NOTICE, ctx, "Deleting old MM Context for same IMSI " - "p_tmsi_old=0x%08x\n", - ictx->p_tmsi); - - mm_ctx_cleanup_free(ictx, "GPRS IMSI re-use"); - } - } - osmo_strlcpy(ctx->imsi, mi_string, sizeof(ctx->imsi)); - break; - case GSM_MI_TYPE_IMEI: - osmo_strlcpy(ctx->imei, mi_string, sizeof(ctx->imei)); - break; - case GSM_MI_TYPE_IMEISV: - break; - } - - /* Check if we can let the mobile station enter */ - return gsm48_gmm_authorize(ctx); -} - -/* Section 9.4.1 Attach request */ -static int gsm48_rx_gmm_att_req(struct sgsn_mm_ctx *ctx, struct msgb *msg, - struct gprs_llc_llme *llme) -{ - struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); - uint8_t *cur = gh->data, *msnc, *mi, *ms_ra_acc_cap; - uint8_t msnc_len, att_type, mi_len, mi_type, ms_ra_acc_cap_len; - uint16_t drx_par; - uint32_t tmsi; - char mi_string[GSM48_MI_SIZE]; - struct gprs_ra_id ra_id; - uint16_t cid = 0; - enum gsm48_gmm_cause reject_cause; - int rc; - - LOGMMCTXP(LOGL_INFO, ctx, "-> GMM ATTACH REQUEST "); - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ATTACH_REQUEST]); - - /* As per TS 04.08 Chapter 4.7.1.4, the attach request arrives either - * with a foreign TLLI (P-TMSI that was allocated to the MS before), - * or with random TLLI. */ - - /* In Iu mode, msg->dst contains the ue_conn_ctx pointer, in Gb mode - * dst is empty. */ - /* FIXME: have a more explicit indicator for Iu messages */ - if (!msg->dst) { - /* Gb mode */ - cid = bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); - } else - ra_id = ((struct ue_conn_ctx*)msg->dst)->ra_id; - - /* MS network capability 10.5.5.12 */ - msnc_len = *cur++; - msnc = cur; - if (msnc_len > sizeof(ctx->ms_network_capa.buf)) - goto err_inval; - cur += msnc_len; - - /* TODO: In iu mode - handle follow-on request */ - - /* aTTACH Type 10.5.5.2 */ - att_type = *cur++ & 0x07; - - /* DRX parameter 10.5.5.6 */ - drx_par = *cur++ << 8; - drx_par |= *cur++; - - /* Mobile Identity (P-TMSI or IMSI) 10.5.1.4 */ - mi_len = *cur++; - mi = cur; - if (mi_len > 8) - goto err_inval; - mi_type = *mi & GSM_MI_TYPE_MASK; - cur += mi_len; - - gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); - - DEBUGPC(DMM, "MI(%s) type=\"%s\" ", mi_string, - get_value_string(gprs_att_t_strs, att_type)); - - /* Old routing area identification 10.5.5.15. Skip it */ - cur += 6; - - /* MS Radio Access Capability 10.5.5.12a */ - ms_ra_acc_cap_len = *cur++; - ms_ra_acc_cap = cur; - if (ms_ra_acc_cap_len > sizeof(ctx->ms_radio_access_capa.buf)) - goto err_inval; - cur += ms_ra_acc_cap_len; - - LOGPC(DMM, LOGL_INFO, "\n"); - - /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status */ - - switch (mi_type) { - case GSM_MI_TYPE_IMSI: - /* Try to find MM context based on IMSI */ - if (!ctx) - ctx = sgsn_mm_ctx_by_imsi(mi_string); - if (!ctx) { -#if 0 - return gsm48_tx_gmm_att_rej(msg, GMM_CAUSE_IMSI_UNKNOWN); -#else - if (msg->dst) - ctx = sgsn_mm_ctx_alloc_iu(msg->dst); - else - ctx = sgsn_mm_ctx_alloc_gb(0, &ra_id); - if (!ctx) { - reject_cause = GMM_CAUSE_NET_FAIL; - goto rejected; - } - osmo_strlcpy(ctx->imsi, mi_string, sizeof(ctx->imsi)); -#endif - } - if (ctx->ran_type == MM_CTX_T_GERAN_Gb) { - ctx->gb.tlli = msgb_tlli(msg); - ctx->gb.llme = llme; - } - msgid2mmctx(ctx, msg); - break; - case GSM_MI_TYPE_TMSI: - memcpy(&tmsi, mi+1, 4); - tmsi = ntohl(tmsi); - /* Try to find MM context based on P-TMSI */ - if (!ctx) - ctx = sgsn_mm_ctx_by_ptmsi(tmsi); - if (!ctx) { - /* Allocate a context as most of our code expects one. - * Context will not have an IMSI ultil ID RESP is received */ - if (msg->dst) - ctx = sgsn_mm_ctx_alloc_iu(msg->dst); - else - ctx = sgsn_mm_ctx_alloc_gb(msgb_tlli(msg), &ra_id); - ctx->p_tmsi = tmsi; - } - if (ctx->ran_type == MM_CTX_T_GERAN_Gb) { - ctx->gb.tlli = msgb_tlli(msg); - ctx->gb.llme = llme; - } - msgid2mmctx(ctx, msg); - break; - default: - LOGMMCTXP(LOGL_NOTICE, ctx, "Rejecting ATTACH REQUEST with " - "MI type %s\n", gsm48_mi_type_name(mi_type)); - reject_cause = GMM_CAUSE_MS_ID_NOT_DERIVED; - goto rejected; - } - /* Update MM Context with currient RA and Cell ID */ - ctx->ra = ra_id; - if (ctx->ran_type == MM_CTX_T_GERAN_Gb) - ctx->gb.cell_id = cid; - else if (ctx->ran_type == MM_CTX_T_UTRAN_Iu) { - /* DEVELOPMENT HACK: Our current HLR does not support 3G - * authentication tokens. A new HLR/VLR implementation is being - * developed. Until it is ready and actual milenage - * authentication is properly supported, we are hardcoding a - * fixed Ki and use 2G auth. */ - unsigned char tmp_rand[16]; - /* Ki 000102030405060708090a0b0c0d0e0f */ - struct osmo_sub_auth_data auth = { - .type = OSMO_AUTH_TYPE_GSM, - .algo = OSMO_AUTH_ALG_COMP128v1, - .u.gsm.ki = { - 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, - 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, - 0x0e, 0x0f - }, - }; - /* XXX: Hack to make 3G auth work with special SIM card */ - ctx->auth_state = SGSN_AUTH_AUTHENTICATE; - - RAND_bytes(tmp_rand, 16); - - memset(&ctx->auth_triplet.vec, 0, sizeof(ctx->auth_triplet.vec)); - osmo_auth_gen_vec(&ctx->auth_triplet.vec, &auth, tmp_rand); - - ctx->auth_triplet.key_seq = 0; - } - - /* Update MM Context with other data */ - ctx->drx_parms = drx_par; - ctx->ms_radio_access_capa.len = ms_ra_acc_cap_len; - memcpy(ctx->ms_radio_access_capa.buf, ms_ra_acc_cap, - ctx->ms_radio_access_capa.len); - ctx->ms_network_capa.len = msnc_len; - memcpy(ctx->ms_network_capa.buf, msnc, msnc_len); - if (!gprs_ms_net_cap_gea_supported(ctx->ms_network_capa.buf, msnc_len, - ctx->ciph_algo)) { - reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; - LOGMMCTXP(LOGL_NOTICE, ctx, "Rejecting ATTACH REQUEST with MI " - "type %s because MS do not support required %s " - "encryption\n", gsm48_mi_type_name(mi_type), - get_value_string(gprs_cipher_names,ctx->ciph_algo)); - goto rejected; - } -#ifdef PTMSI_ALLOC - /* Allocate a new P-TMSI (+ P-TMSI signature) and update TLLI */ - /* Don't change the P-TMSI if a P-TMSI re-assignment is under way */ - if (ctx->gmm_state != GMM_COMMON_PROC_INIT) { - ctx->p_tmsi_old = ctx->p_tmsi; - ctx->p_tmsi = sgsn_alloc_ptmsi(); - } - ctx->gmm_state = GMM_COMMON_PROC_INIT; -#endif - - if (ctx->ran_type == MM_CTX_T_GERAN_Gb) { - /* Even if there is no P-TMSI allocated, the MS will - * switch from foreign TLLI to local TLLI */ - ctx->gb.tlli_new = gprs_tmsi2tlli(ctx->p_tmsi, TLLI_LOCAL); - - /* Inform LLC layer about new TLLI but keep old active */ - if (ctx->is_authenticated) - gprs_llme_copy_key(ctx, ctx->gb.llme); - - gprs_llgmm_assign(ctx->gb.llme, ctx->gb.tlli, ctx->gb.tlli_new); - } - - ctx->pending_req = GSM48_MT_GMM_ATTACH_REQ; - return gsm48_gmm_authorize(ctx); - -err_inval: - LOGPC(DMM, LOGL_INFO, "\n"); - reject_cause = GMM_CAUSE_SEM_INCORR_MSG; - -rejected: - /* Send ATTACH REJECT */ - LOGMMCTXP(LOGL_NOTICE, ctx, - "Rejecting Attach Request with cause '%s' (%d)\n", - get_value_string(gsm48_gmm_cause_names, reject_cause), reject_cause); - rc = gsm48_tx_gmm_att_rej_oldmsg(msg, reject_cause); - if (ctx) - mm_ctx_cleanup_free(ctx, "GPRS ATTACH REJ"); - else - gprs_llgmm_unassign(llme); - - return rc; - -} - -/* Section 4.7.4.1 / 9.4.5.2 MO Detach request */ -static int gsm48_rx_gmm_det_req(struct sgsn_mm_ctx *ctx, struct msgb *msg) -{ - struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); - uint8_t detach_type, power_off; - int rc = 0; - - detach_type = gh->data[0] & 0x7; - power_off = gh->data[0] & 0x8; - - /* FIXME: In 24.008 there is an optional P-TMSI and P-TMSI signature IE */ - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_DETACH_REQUEST]); - LOGMMCTXP(LOGL_INFO, ctx, "-> GMM DETACH REQUEST TLLI=0x%08x type=%s %s\n", - msgb_tlli(msg), get_value_string(gprs_det_t_mo_strs, detach_type), - power_off ? "Power-off" : ""); - - /* Only send the Detach Accept (MO) if power off isn't indicated, - * see 04.08, 4.7.4.1.2/3 for details */ - if (!power_off) { - /* force_stby = 0 */ - if (ctx) - rc = gsm48_tx_gmm_det_ack(ctx, 0); - else - rc = gsm48_tx_gmm_det_ack_oldmsg(msg, 0); - } - - if (ctx) { - struct sgsn_signal_data sig_data; - memset(&sig_data, 0, sizeof(sig_data)); - sig_data.mm = ctx; - osmo_signal_dispatch(SS_SGSN, S_SGSN_DETACH, &sig_data); - mm_ctx_cleanup_free(ctx, "GPRS DETACH REQUEST"); - } - - return rc; -} - -/* Chapter 9.4.15: Routing area update accept */ -static int gsm48_tx_gmm_ra_upd_ack(struct sgsn_mm_ctx *mm) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 UPD ACK"); - struct gsm48_hdr *gh; - struct gsm48_ra_upd_ack *rua; - uint8_t *mid; - - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ROUTING_AREA_ACKED]); - LOGMMCTXP(LOGL_INFO, mm, "<- ROUTING AREA UPDATE ACCEPT\n"); - - mmctx2msgid(msg, mm); - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); - gh->proto_discr = GSM48_PDISC_MM_GPRS; - gh->msg_type = GSM48_MT_GMM_RA_UPD_ACK; - - rua = (struct gsm48_ra_upd_ack *) msgb_put(msg, sizeof(*rua)); - rua->force_stby = 0; /* not indicated */ - rua->upd_result = 0; /* RA updated */ - rua->ra_upd_timer = gprs_secs_to_tmr_floor(sgsn->cfg.timers.T3312); - - gsm48_construct_ra(rua->ra_id.digits, &mm->ra); - -#if 0 - /* Optional: P-TMSI signature */ - msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); - ptsig = msgb_put(msg, 3); - ptsig[0] = mm->p_tmsi_sig >> 16; - ptsig[1] = mm->p_tmsi_sig >> 8; - ptsig[2] = mm->p_tmsi_sig & 0xff; -#endif - -#ifdef PTMSI_ALLOC - /* Optional: Allocated P-TMSI */ - mid = msgb_put(msg, GSM48_MID_TMSI_LEN); - gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); - mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; -#endif - - /* Optional: Negotiated READY timer value */ - msgb_tv_put(msg, GSM48_IE_GMM_TIMER_READY, - gprs_secs_to_tmr_floor(sgsn->cfg.timers.T3314)); - - /* Option: MS ID, ... */ - return gsm48_gmm_sendmsg(msg, 0, mm, true); -} - -/* Chapter 9.4.17: Routing area update reject */ -static int gsm48_tx_gmm_ra_upd_rej(struct msgb *old_msg, uint8_t cause) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 RA UPD REJ"); - struct gsm48_hdr *gh; - - LOGP(DMM, LOGL_NOTICE, "<- ROUTING AREA UPDATE REJECT\n"); - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ROUTING_AREA_REJECT]); - - gmm_copy_id(msg, old_msg); - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 2); - gh->proto_discr = GSM48_PDISC_MM_GPRS; - gh->msg_type = GSM48_MT_GMM_RA_UPD_REJ; - gh->data[0] = cause; - gh->data[1] = 0; /* ? */ - - /* Option: P-TMSI signature, allocated P-TMSI, MS ID, ... */ - return gsm48_gmm_sendmsg(msg, 0, NULL, false); -} - -static void process_ms_ctx_status(struct sgsn_mm_ctx *mmctx, - const uint8_t *pdp_status) -{ - struct sgsn_pdp_ctx *pdp, *pdp2; - /* 24.008 4.7.5.1.3: If the PDP context status information element is - * included in ROUTING AREA UPDATE REQUEST message, then the network - * shall deactivate all those PDP contexts locally (without peer to - * peer signalling between the MS and the network), which are not in SM - * state PDP-INACTIVE on network side but are indicated by the MS as - * being in state PDP-INACTIVE. */ - - llist_for_each_entry_safe(pdp, pdp2, &mmctx->pdp_list, list) { - if (pdp->nsapi < 8) { - if (!(pdp_status[0] & (1 << pdp->nsapi))) { - LOGMMCTXP(LOGL_NOTICE, mmctx, "Dropping PDP context for NSAPI=%u " - "due to PDP CTX STATUS IE= 0x%02x%02x\n", - pdp->nsapi, pdp_status[1], pdp_status[0]); - sgsn_delete_pdp_ctx(pdp); - } - } else { - if (!(pdp_status[1] & (1 << (pdp->nsapi - 8)))) { - LOGMMCTXP(LOGL_NOTICE, mmctx, "Dropping PDP context for NSAPI=%u " - "due to PDP CTX STATUS IE= 0x%02x%02x\n", - pdp->nsapi, pdp_status[1], pdp_status[0]); - sgsn_delete_pdp_ctx(pdp); - } - } - } -} - -/* Chapter 9.4.14: Routing area update request */ -static int gsm48_rx_gmm_ra_upd_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg, - struct gprs_llc_llme *llme) -{ -#ifndef PTMSI_ALLOC - struct sgsn_signal_data sig_data; -#endif - struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); - uint8_t *cur = gh->data; - uint8_t ms_ra_acc_cap_len; - struct gprs_ra_id old_ra_id; - struct tlv_parsed tp; - uint8_t upd_type; - enum gsm48_gmm_cause reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; - int rc; - - /* TODO: In iu mode - handle follow-on request */ - - /* Update Type 10.5.5.18 */ - upd_type = *cur++ & 0x07; - - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ROUTING_AREA_REQUEST]); - LOGP(DMM, LOGL_INFO, "-> GMM RA UPDATE REQUEST type=\"%s\"\n", - get_value_string(gprs_upd_t_strs, upd_type)); - - /* Old routing area identification 10.5.5.15 */ - gsm48_parse_ra(&old_ra_id, cur); - cur += 6; - - /* MS Radio Access Capability 10.5.5.12a */ - ms_ra_acc_cap_len = *cur++; - if (ms_ra_acc_cap_len > 52) { - reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; - goto rejected; - } - cur += ms_ra_acc_cap_len; - - /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status, - * DRX parameter, MS network capability */ - tlv_parse(&tp, &gsm48_gmm_att_tlvdef, cur, - (msg->data + msg->len) - cur, 0, 0); - - switch (upd_type) { - case GPRS_UPD_T_RA_LA: - case GPRS_UPD_T_RA_LA_IMSI_ATT: - LOGP(DMM, LOGL_NOTICE, "Update type %i unsupported in Mode III, is your SI13 corrupt?\n", upd_type); - reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; - goto rejected; - case GPRS_UPD_T_RA: - case GPRS_UPD_T_PERIODIC: - break; - } - - if (!mmctx) { - /* BSSGP doesn't give us an mmctx */ - - /* TODO: Check if there is an MM CTX with old_ra_id and - * the P-TMSI (if given, reguired for UMTS) or as last resort - * if the TLLI matches foreign_tlli (P-TMSI). Note that this - * is an optimization to avoid the RA reject (impl detached) - * below, which will cause a new attach cycle. */ - /* Look-up the MM context based on old RA-ID and TLLI */ - /* In Iu mode, msg->dst contains the ue_conn_ctx pointer, in Gb - * mode dst is empty. */ - /* FIXME: have a more explicit indicator for Iu messages */ - if (!msg->dst) { - mmctx = sgsn_mm_ctx_by_tlli_and_ptmsi(msgb_tlli(msg), &old_ra_id); - } else if (TLVP_PRESENT(&tp, GSM48_IE_GMM_ALLOC_PTMSI)) { -#ifdef BUILD_IU - /* In Iu mode search only for ptmsi */ - char mi_string[GSM48_MI_SIZE]; - uint8_t mi_len = TLVP_LEN(&tp, GSM48_IE_GMM_ALLOC_PTMSI); - uint8_t *mi = TLVP_VAL(&tp, GSM48_IE_GMM_ALLOC_PTMSI); - uint8_t mi_type = *mi & GSM_MI_TYPE_MASK; - uint32_t tmsi; - - gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); - - if (mi_type == GSM_MI_TYPE_TMSI) { - memcpy(&tmsi, mi+1, 4); - tmsi = ntohl(tmsi); - mmctx = sgsn_mm_ctx_by_ptmsi(tmsi); - } -#else - goto rejected; -#endif - } - if (mmctx) { - LOGMMCTXP(LOGL_INFO, mmctx, - "Looked up by matching TLLI and P_TMSI. " - "BSSGP TLLI: %08x, P-TMSI: %08x (%08x), " - "TLLI: %08x (%08x), RA: %d-%d-%d-%d\n", - msgb_tlli(msg), - mmctx->p_tmsi, mmctx->p_tmsi_old, - mmctx->gb.tlli, mmctx->gb.tlli_new, - mmctx->ra.mcc, mmctx->ra.mnc, - mmctx->ra.lac, mmctx->ra.rac); - - mmctx->gmm_state = GMM_COMMON_PROC_INIT; - } - } else if (!gprs_ra_id_equals(&mmctx->ra, &old_ra_id) || - mmctx->gmm_state == GMM_DEREGISTERED) - { - /* We cannot use the mmctx */ - LOGMMCTXP(LOGL_INFO, mmctx, - "The MM context cannot be used, RA: %d-%d-%d-%d\n", - mmctx->ra.mcc, mmctx->ra.mnc, - mmctx->ra.lac, mmctx->ra.rac); - mmctx = NULL; - } - - if (!mmctx) { - if (llme) { - /* send a XID reset to re-set all LLC sequence numbers - * in the MS */ - LOGMMCTXP(LOGL_NOTICE, mmctx, "LLC XID RESET\n"); - gprs_llgmm_reset(llme); - } - /* The MS has to perform GPRS attach */ - /* Device is still IMSI attached for CS but initiate GPRS ATTACH, - * see GSM 04.08, 4.7.5.1.4 and G.6 */ - reject_cause = GMM_CAUSE_IMPL_DETACHED; - goto rejected; - } - - /* Store new BVCI/NSEI in MM context (FIXME: delay until we ack?) */ - msgid2mmctx(mmctx, msg); - /* Bump the statistics of received signalling msgs for this MM context */ - rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); - - /* Update the MM context with the new RA-ID */ - if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { - bssgp_parse_cell_id(&mmctx->ra, msgb_bcid(msg)); - /* Update the MM context with the new (i.e. foreign) TLLI */ - mmctx->gb.tlli = msgb_tlli(msg); - } - /* FIXME: Update the MM context with the MS radio acc capabilities */ - /* FIXME: Update the MM context with the MS network capabilities */ - - rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_RA_UPDATE]); - -#ifdef PTMSI_ALLOC - /* Don't change the P-TMSI if a P-TMSI re-assignment is under way */ - if (mmctx->gmm_state != GMM_COMMON_PROC_INIT) { - mmctx->p_tmsi_old = mmctx->p_tmsi; - mmctx->p_tmsi = sgsn_alloc_ptmsi(); - } - /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ - mmctx->t3350_mode = GMM_T3350_MODE_RAU; - mmctx_timer_start(mmctx, 3350, sgsn->cfg.timers.T3350); - - mmctx->gmm_state = GMM_COMMON_PROC_INIT; -#else - /* Make sure we are NORMAL (i.e. not SUSPENDED anymore) */ - mmctx->gmm_state = GMM_REGISTERED_NORMAL; - - memset(&sig_data, 0, sizeof(sig_data)); - sig_data.mm = mmctx; - osmo_signal_dispatch(SS_SGSN, S_SGSN_UPDATE, &sig_data); -#endif - if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { - /* Even if there is no P-TMSI allocated, the MS will switch from - * foreign TLLI to local TLLI */ - mmctx->gb.tlli_new = gprs_tmsi2tlli(mmctx->p_tmsi, TLLI_LOCAL); - - /* Inform LLC layer about new TLLI but keep old active */ - gprs_llgmm_assign(mmctx->gb.llme, mmctx->gb.tlli, - mmctx->gb.tlli_new); - } - - /* Look at PDP Context Status IE and see if MS's view of - * activated/deactivated NSAPIs agrees with our view */ - if (TLVP_PRESENT(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)) { - const uint8_t *pdp_status = TLVP_VAL(&tp, GSM48_IE_GMM_PDP_CTX_STATUS); - process_ms_ctx_status(mmctx, pdp_status); - } - - /* Send RA UPDATE ACCEPT. In Iu, the RA upd request can be called from - * a new Iu connection, so we might need to re-authenticate the - * connection as well as turn on integrity protection. */ - mmctx->pending_req = GSM48_MT_GMM_RA_UPD_REQ; - return gsm48_gmm_authorize(mmctx); - -rejected: - /* Send RA UPDATE REJECT */ - LOGMMCTXP(LOGL_NOTICE, mmctx, - "Rejecting RA Update Request with cause '%s' (%d)\n", - get_value_string(gsm48_gmm_cause_names, reject_cause), reject_cause); - rc = gsm48_tx_gmm_ra_upd_rej(msg, reject_cause); - if (mmctx) - mm_ctx_cleanup_free(mmctx, "GPRS RA UPDATE REJ"); - else { - if (llme) - gprs_llgmm_unassign(llme); - } - - return rc; -} - -/* 3GPP TS 24.008 Section 9.4.20 Service request. - * In Iu, a UE in PMM-IDLE mode can use GSM48_MT_GMM_SERVICE_REQ to switch back - * to PMM-CONNECTED mode. */ -static int gsm48_rx_gmm_service_req(struct sgsn_mm_ctx *ctx, struct msgb *msg) -{ - struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); - uint8_t *cur = gh->data, *mi; - uint8_t ciph_seq_nr, service_type, mi_len, mi_type; - uint32_t tmsi; - struct tlv_parsed tp; - char mi_string[GSM48_MI_SIZE]; - enum gsm48_gmm_cause reject_cause; - int rc; - - LOGMMCTXP(LOGL_INFO, ctx, "-> GMM SERVICE REQUEST "); - - /* This message is only valid in Iu mode */ - if (!msg->dst) { - LOGPC(DMM, LOGL_INFO, "Invalid if not in Iu mode\n"); - return -1; - } - - /* Skip Ciphering key sequence number 10.5.1.2 */ - ciph_seq_nr = *cur & 0x07; - - /* Service type 10.5.5.20 */ - service_type = (*cur++ >> 4) & 0x07; - - /* Mobile Identity (P-TMSI or IMSI) 10.5.1.4 */ - mi_len = *cur++; - mi = cur; - if (mi_len > 8) - goto err_inval; - mi_type = *mi & GSM_MI_TYPE_MASK; - cur += mi_len; - - gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); - - DEBUGPC(DMM, "MI(%s) type=\"%s\" ", mi_string, - get_value_string(gprs_service_t_strs, service_type)); - - LOGPC(DMM, LOGL_INFO, "\n"); - - /* Optional: PDP context status, MBMS context status, Uplink data status, Device properties */ - tlv_parse(&tp, &gsm48_gmm_att_tlvdef, cur, (msg->data + msg->len) - cur, 0, 0); - - switch (mi_type) { - case GSM_MI_TYPE_IMSI: - /* Try to find MM context based on IMSI */ - if (!ctx) - ctx = sgsn_mm_ctx_by_imsi(mi_string); - if (!ctx) { - /* FIXME: We need to have a context for service request? */ - reject_cause = GMM_CAUSE_NET_FAIL; - goto rejected; - } - msgid2mmctx(ctx, msg); - break; - case GSM_MI_TYPE_TMSI: - memcpy(&tmsi, mi+1, 4); - tmsi = ntohl(tmsi); - /* Try to find MM context based on P-TMSI */ - if (!ctx) - ctx = sgsn_mm_ctx_by_ptmsi(tmsi); - if (!ctx) { - /* FIXME: We need to have a context for service request? */ - reject_cause = GMM_CAUSE_NET_FAIL; - goto rejected; - } - msgid2mmctx(ctx, msg); - break; - default: - LOGMMCTXP(LOGL_NOTICE, ctx, "Rejecting SERVICE REQUEST with " - "MI type %s\n", gsm48_mi_type_name(mi_type)); - reject_cause = GMM_CAUSE_MS_ID_NOT_DERIVED; - goto rejected; - } - - ctx->gmm_state = GMM_COMMON_PROC_INIT; - - ctx->iu.service.type = service_type; - - /* TODO: Handle those only in case of accept? */ - /* Look at PDP Context Status IE and see if MS's view of - * activated/deactivated NSAPIs agrees with our view */ - if (TLVP_PRESENT(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)) { - const uint8_t *pdp_status = TLVP_VAL(&tp, GSM48_IE_GMM_PDP_CTX_STATUS); - process_ms_ctx_status(ctx, pdp_status); - } - - - ctx->pending_req = GSM48_MT_GMM_SERVICE_REQ; - return gsm48_gmm_authorize(ctx); - -err_inval: - LOGPC(DMM, LOGL_INFO, "\n"); - reject_cause = GMM_CAUSE_SEM_INCORR_MSG; - -rejected: - /* Send SERVICE REJECT */ - LOGMMCTXP(LOGL_NOTICE, ctx, - "Rejecting Service Request with cause '%s' (%d)\n", - get_value_string(gsm48_gmm_cause_names, reject_cause), reject_cause); - rc = gsm48_tx_gmm_service_rej_oldmsg(msg, reject_cause); - - return rc; - -} - - -static int gsm48_rx_gmm_status(struct sgsn_mm_ctx *mmctx, struct msgb *msg) -{ - struct gsm48_hdr *gh = msgb_l3(msg); - - LOGMMCTXP(LOGL_INFO, mmctx, "-> GPRS MM STATUS (cause: %s)\n", - get_value_string(gsm48_gmm_cause_names, gh->data[0])); - - return 0; -} - -/* GPRS Mobility Management */ -static int gsm0408_rcv_gmm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, - struct gprs_llc_llme *llme, bool drop_cipherable) -{ - struct sgsn_signal_data sig_data; - struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); - int rc; - - /* MMCTX can be NULL when called */ - if (drop_cipherable && gsm48_hdr_gmm_cipherable(gh)) { - LOGMMCTXP(LOGL_NOTICE, mmctx, "Dropping cleartext GMM %s which " - "is expected to be encrypted for TLLI 0x%08x\n", - get_value_string(gprs_msgt_gmm_names, gh->msg_type), - llme->tlli); - return -EBADMSG; - } - - if (llme && !mmctx && - gh->msg_type != GSM48_MT_GMM_ATTACH_REQ && - gh->msg_type != GSM48_MT_GMM_RA_UPD_REQ) { - LOGP(DMM, LOGL_NOTICE, "Cannot handle GMM for unknown MM CTX\n"); - /* 4.7.10 */ - if (gh->msg_type == GSM48_MT_GMM_STATUS) { - /* TLLI unassignment */ - gprs_llgmm_unassign(llme); - return 0; - } - - /* Don't reply or establish a LLME on DETACH_ACK */ - if (gh->msg_type == GSM48_MT_GMM_DETACH_ACK) - return gprs_llgmm_unassign(llme); - - gprs_llgmm_reset(llme); - - /* Don't force it into re-attachment */ - if (gh->msg_type == GSM48_MT_GMM_DETACH_REQ) { - /* Handle Detach Request */ - rc = gsm48_rx_gmm_det_req(NULL, msg); - - /* TLLI unassignment */ - gprs_llgmm_unassign(llme); - return rc; - } - - /* Force the MS to re-attach */ - rc = gsm0408_gprs_force_reattach_oldmsg(msg, llme); - - /* TLLI unassignment */ - gprs_llgmm_unassign(llme); - return rc; - } - - /* - * For a few messages, mmctx may be NULL. For most, we want to ensure a - * non-NULL mmctx. At the same time, we want to keep the message - * validity check intact, so that all message types appear in the - * switch statement and the default case thus means "unknown message". - * If we split the switch in two parts to check non-NULL halfway, the - * unknown-message check breaks, or we'd need to duplicate the switch - * cases in both parts. Just keep one large switch and add some gotos. - */ - switch (gh->msg_type) { - case GSM48_MT_GMM_RA_UPD_REQ: - rc = gsm48_rx_gmm_ra_upd_req(mmctx, msg, llme); - break; - case GSM48_MT_GMM_ATTACH_REQ: - rc = gsm48_rx_gmm_att_req(mmctx, msg, llme); - break; - case GSM48_MT_GMM_SERVICE_REQ: - rc = gsm48_rx_gmm_service_req(mmctx, msg); - break; - /* For all the following types mmctx can not be NULL */ - case GSM48_MT_GMM_ID_RESP: - if (!mmctx) - goto null_mmctx; - rc = gsm48_rx_gmm_id_resp(mmctx, msg); - break; - case GSM48_MT_GMM_STATUS: - if (!mmctx) - goto null_mmctx; - rc = gsm48_rx_gmm_status(mmctx, msg); - break; - case GSM48_MT_GMM_DETACH_REQ: - if (!mmctx) - goto null_mmctx; - rc = gsm48_rx_gmm_det_req(mmctx, msg); - break; - case GSM48_MT_GMM_DETACH_ACK: - if (!mmctx) - goto null_mmctx; - LOGMMCTXP(LOGL_INFO, mmctx, "-> DETACH ACK\n"); - mm_ctx_cleanup_free(mmctx, "GPRS DETACH ACK"); - rc = 0; - break; - case GSM48_MT_GMM_ATTACH_COMPL: - if (!mmctx) - goto null_mmctx; - /* only in case SGSN offered new P-TMSI */ - LOGMMCTXP(LOGL_INFO, mmctx, "-> ATTACH COMPLETE\n"); - mmctx_timer_stop(mmctx, 3350); - mmctx->t3350_mode = GMM_T3350_MODE_NONE; - mmctx->p_tmsi_old = 0; - mmctx->pending_req = 0; - if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { - /* Unassign the old TLLI */ - mmctx->gb.tlli = mmctx->gb.tlli_new; - gprs_llme_copy_key(mmctx, mmctx->gb.llme); - gprs_llgmm_assign(mmctx->gb.llme, 0xffffffff, - mmctx->gb.tlli_new); - } - mmctx->gmm_state = GMM_REGISTERED_NORMAL; - mmctx_set_pmm_state(mmctx, PMM_CONNECTED); - mmctx_set_mm_state(mmctx, MM_READY); - rc = 0; - - memset(&sig_data, 0, sizeof(sig_data)); - sig_data.mm = mmctx; - osmo_signal_dispatch(SS_SGSN, S_SGSN_ATTACH, &sig_data); - break; - case GSM48_MT_GMM_RA_UPD_COMPL: - if (!mmctx) - goto null_mmctx; - /* only in case SGSN offered new P-TMSI */ - LOGMMCTXP(LOGL_INFO, mmctx, "-> ROUTING AREA UPDATE COMPLETE\n"); - mmctx_timer_stop(mmctx, 3350); - mmctx->t3350_mode = GMM_T3350_MODE_NONE; - mmctx->p_tmsi_old = 0; - mmctx->pending_req = 0; - if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { - /* Unassign the old TLLI */ - mmctx->gb.tlli = mmctx->gb.tlli_new; - gprs_llgmm_assign(mmctx->gb.llme, 0xffffffff, - mmctx->gb.tlli_new); - } - mmctx->gmm_state = GMM_REGISTERED_NORMAL; - mmctx_set_pmm_state(mmctx, PMM_CONNECTED); - mmctx_set_mm_state(mmctx, MM_READY); - rc = 0; - - memset(&sig_data, 0, sizeof(sig_data)); - sig_data.mm = mmctx; - osmo_signal_dispatch(SS_SGSN, S_SGSN_UPDATE, &sig_data); - break; - case GSM48_MT_GMM_PTMSI_REALL_COMPL: - if (!mmctx) - goto null_mmctx; - LOGMMCTXP(LOGL_INFO, mmctx, "-> PTMSI REALLLICATION COMPLETE\n"); - mmctx_timer_stop(mmctx, 3350); - mmctx->t3350_mode = GMM_T3350_MODE_NONE; - mmctx->p_tmsi_old = 0; - mmctx->pending_req = 0; - if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { - /* Unassign the old TLLI */ - mmctx->gb.tlli = mmctx->gb.tlli_new; - //gprs_llgmm_assign(mmctx->gb.llme, 0xffffffff, mmctx->gb.tlli_new, GPRS_ALGO_GEA0, NULL); - } - rc = 0; - break; - case GSM48_MT_GMM_AUTH_CIPH_RESP: - if (!mmctx) - goto null_mmctx; - rc = gsm48_rx_gmm_auth_ciph_resp(mmctx, msg); - break; - case GSM48_MT_GMM_AUTH_CIPH_FAIL: - rc = gsm48_rx_gmm_auth_ciph_fail(mmctx, msg); - break; - default: - LOGMMCTXP(LOGL_NOTICE, mmctx, "Unknown GSM 04.08 GMM msg type 0x%02x\n", - gh->msg_type); - if (mmctx) - rc = gsm48_tx_gmm_status(mmctx, GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL); - else - rc = -EINVAL; - break; - } - - return rc; - -null_mmctx: - LOGP(DMM, LOGL_ERROR, - "Received GSM 04.08 message type 0x%02x," - " but no MM context available\n", - gh->msg_type); - return -EINVAL; -} - -static void mmctx_timer_cb(void *_mm) -{ - struct sgsn_mm_ctx *mm = _mm; - struct gsm_auth_tuple *at; - - mm->num_T_exp++; - - switch (mm->T) { - case 3350: /* waiting for ATTACH COMPLETE */ - if (mm->num_T_exp >= 5) { - LOGMMCTXP(LOGL_NOTICE, mm, "T3350 expired >= 5 times\n"); - mm_ctx_cleanup_free(mm, "T3350"); - /* FIXME: should we return some error? */ - break; - } - /* re-transmit the respective msg and re-start timer */ - switch (mm->t3350_mode) { - case GMM_T3350_MODE_ATT: - gsm48_tx_gmm_att_ack(mm); - break; - case GMM_T3350_MODE_RAU: - gsm48_tx_gmm_ra_upd_ack(mm); - break; - case GMM_T3350_MODE_PTMSI_REALL: - /* FIXME */ - break; - case GMM_T3350_MODE_NONE: - LOGMMCTXP(LOGL_NOTICE, mm, - "T3350 mode wasn't set, ignoring timeout\n"); - break; - } - osmo_timer_schedule(&mm->timer, sgsn->cfg.timers.T3350, 0); - break; - case 3360: /* waiting for AUTH AND CIPH RESP */ - if (mm->num_T_exp >= 5) { - LOGMMCTXP(LOGL_NOTICE, mm, "T3360 expired >= 5 times\n"); - mm_ctx_cleanup_free(mm, "T3360"); - break; - } - /* Re-transmit the respective msg and re-start timer */ - if (mm->auth_triplet.key_seq == GSM_KEY_SEQ_INVAL) { - LOGMMCTXP(LOGL_ERROR, mm, - "timeout: invalid auth triplet reference\n"); - mm_ctx_cleanup_free(mm, "T3360"); - break; - } - at = &mm->auth_triplet; - - gsm48_tx_gmm_auth_ciph_req(mm, &at->vec, at->key_seq, false); - osmo_timer_schedule(&mm->timer, sgsn->cfg.timers.T3360, 0); - break; - case 3370: /* waiting for IDENTITY RESPONSE */ - if (mm->num_T_exp >= 5) { - LOGMMCTXP(LOGL_NOTICE, mm, "T3370 expired >= 5 times\n"); - gsm48_tx_gmm_att_rej(mm, GMM_CAUSE_MS_ID_NOT_DERIVED); - mm_ctx_cleanup_free(mm, "GPRS ATTACH REJECT (T3370)"); - break; - } - /* re-tranmit IDENTITY REQUEST and re-start timer */ - gsm48_tx_gmm_id_req(mm, mm->t3370_id_type); - osmo_timer_schedule(&mm->timer, sgsn->cfg.timers.T3370, 0); - break; - default: - LOGMMCTXP(LOGL_ERROR, mm, "timer expired in unknown mode %u\n", - mm->T); - } -} - -/* GPRS SESSION MANAGEMENT */ - -static void pdpctx_timer_cb(void *_mm); - -static void pdpctx_timer_start(struct sgsn_pdp_ctx *pdp, unsigned int T, - unsigned int seconds) -{ - if (osmo_timer_pending(&pdp->timer)) - LOGPDPCTXP(LOGL_ERROR, pdp, "Starting PDP timer %u while old " - "timer %u pending\n", T, pdp->T); - pdp->T = T; - pdp->num_T_exp = 0; - - /* FIXME: we should do this only once ? */ - osmo_timer_setup(&pdp->timer, pdpctx_timer_cb, pdp); - osmo_timer_schedule(&pdp->timer, seconds, 0); -} - -static void pdpctx_timer_stop(struct sgsn_pdp_ctx *pdp, unsigned int T) -{ - if (pdp->T != T) - LOGPDPCTXP(LOGL_ERROR, pdp, "Stopping PDP timer %u but " - "%u is running\n", T, pdp->T); - osmo_timer_del(&pdp->timer); -} - -#if 0 -static void msgb_put_pdp_addr_ipv4(struct msgb *msg, uint32_t ipaddr) -{ - uint8_t v[6]; - - v[0] = PDP_TYPE_ORG_IETF; - v[1] = PDP_TYPE_N_IETF_IPv4; - *(uint32_t *)(v+2) = htonl(ipaddr); - - msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); -} - -static void msgb_put_pdp_addr_ppp(struct msgb *msg) -{ - uint8_t v[2]; - - v[0] = PDP_TYPE_ORG_ETSI; - v[1] = PDP_TYPE_N_ETSI_PPP; - - msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); -} -#endif - -/* Section 9.5.2: Activate PDP Context Accept */ -int gsm48_tx_gsm_act_pdp_acc(struct sgsn_pdp_ctx *pdp) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP ACC"); - struct gsm48_hdr *gh; - uint8_t transaction_id = pdp->ti ^ 0x8; /* flip */ - - LOGPDPCTXP(LOGL_INFO, pdp, "<- ACTIVATE PDP CONTEXT ACK\n"); - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_ACCEPT]); - - mmctx2msgid(msg, pdp->mm); - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); - gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); - gh->msg_type = GSM48_MT_GSM_ACT_PDP_ACK; - - /* Negotiated LLC SAPI */ - msgb_v_put(msg, pdp->sapi); - - /* FIXME: copy QoS parameters from original request */ - //msgb_lv_put(msg, pdp->lib->qos_neg.l, pdp->lib->qos_neg.v); - msgb_lv_put(msg, sizeof(default_qos), (uint8_t *)&default_qos); - - /* Radio priority 10.5.7.2 */ - msgb_v_put(msg, pdp->lib->radio_pri); - - /* PDP address */ - /* Highest 4 bits of first byte need to be set to 1, otherwise - * the IE is identical with the 04.08 PDP Address IE */ - pdp->lib->eua.v[0] &= ~0xf0; - msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, - pdp->lib->eua.l, pdp->lib->eua.v); - pdp->lib->eua.v[0] |= 0xf0; - - /* Optional: Protocol configuration options (FIXME: why 'req') */ - if (pdp->lib->pco_req.l) - msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, - pdp->lib->pco_req.l, pdp->lib->pco_req.v); - - /* Optional: Packet Flow Identifier */ - - return gsm48_gmm_sendmsg(msg, 0, pdp->mm, true); -} - -/* Section 9.5.3: Activate PDP Context reject */ -int gsm48_tx_gsm_act_pdp_rej(struct sgsn_mm_ctx *mm, uint8_t tid, - uint8_t cause, uint8_t pco_len, uint8_t *pco_v) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP REJ"); - struct gsm48_hdr *gh; - uint8_t transaction_id = tid ^ 0x8; /* flip */ - - LOGMMCTXP(LOGL_NOTICE, mm, "<- ACTIVATE PDP CONTEXT REJ(cause=%u)\n", cause); - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_REJECT]); - - mmctx2msgid(msg, mm); - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); - gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); - gh->msg_type = GSM48_MT_GSM_ACT_PDP_REJ; - - msgb_v_put(msg, cause); - if (pco_len && pco_v) - msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, pco_len, pco_v); - - return gsm48_gmm_sendmsg(msg, 0, mm, true); -} - -/* Section 9.5.8: Deactivate PDP Context Request */ -static int _gsm48_tx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, uint8_t tid, - uint8_t sm_cause) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP DET REQ"); - struct gsm48_hdr *gh; - uint8_t transaction_id = tid ^ 0x8; /* flip */ - - LOGMMCTXP(LOGL_INFO, mm, "<- DEACTIVATE PDP CONTEXT REQ\n"); - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_DL_DEACTIVATE_REQUEST]); - - mmctx2msgid(msg, mm); - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); - gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); - gh->msg_type = GSM48_MT_GSM_DEACT_PDP_REQ; - - msgb_v_put(msg, sm_cause); - - return gsm48_gmm_sendmsg(msg, 0, mm, true); -} -int gsm48_tx_gsm_deact_pdp_req(struct sgsn_pdp_ctx *pdp, uint8_t sm_cause) -{ - pdpctx_timer_start(pdp, 3395, sgsn->cfg.timers.T3395); - - return _gsm48_tx_gsm_deact_pdp_req(pdp->mm, pdp->ti, sm_cause); -} - -/* Section 9.5.9: Deactivate PDP Context Accept */ -static int _gsm48_tx_gsm_deact_pdp_acc(struct sgsn_mm_ctx *mm, uint8_t tid) -{ - struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP DET ACC"); - struct gsm48_hdr *gh; - uint8_t transaction_id = tid ^ 0x8; /* flip */ - - LOGMMCTXP(LOGL_INFO, mm, "<- DEACTIVATE PDP CONTEXT ACK\n"); - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_DL_DEACTIVATE_ACCEPT]); - - mmctx2msgid(msg, mm); - - gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); - gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); - gh->msg_type = GSM48_MT_GSM_DEACT_PDP_ACK; - - return gsm48_gmm_sendmsg(msg, 0, mm, true); -} -int gsm48_tx_gsm_deact_pdp_acc(struct sgsn_pdp_ctx *pdp) -{ - return _gsm48_tx_gsm_deact_pdp_acc(pdp->mm, pdp->ti); -} - -static int activate_ggsn(struct sgsn_mm_ctx *mmctx, - struct sgsn_ggsn_ctx *ggsn, const uint8_t transaction_id, - const uint8_t req_nsapi, const uint8_t req_llc_sapi, - struct tlv_parsed *tp, int destroy_ggsn) -{ - struct sgsn_pdp_ctx *pdp; - - LOGMMCTXP(LOGL_DEBUG, mmctx, "Using GGSN %u\n", ggsn->id); - ggsn->gsn = sgsn->gsn; - pdp = sgsn_create_pdp_ctx(ggsn, mmctx, req_nsapi, tp); - if (!pdp) - return -1; - - /* Store SAPI and Transaction Identifier */ - pdp->sapi = req_llc_sapi; - pdp->ti = transaction_id; - pdp->destroy_ggsn = destroy_ggsn; - - return 0; -} - -static void ggsn_lookup_cb(void *arg, int status, int timeouts, struct hostent *hostent) -{ - struct sgsn_ggsn_ctx *ggsn; - struct sgsn_ggsn_lookup *lookup = arg; - struct in_addr *addr = NULL; - - /* The context is gone while we made a request */ - if (!lookup->mmctx) { - talloc_free(lookup->orig_msg); - talloc_free(lookup); - return; - } - - if (status != ARES_SUCCESS) { - struct sgsn_mm_ctx *mmctx = lookup->mmctx; - - LOGMMCTXP(LOGL_ERROR, mmctx, "DNS query failed.\n"); - - /* Need to try with three digits now */ - if (lookup->state == SGSN_GGSN_2DIGIT) { - char *hostname; - int rc; - - lookup->state = SGSN_GGSN_3DIGIT; - hostname = osmo_apn_qualify_from_imsi(mmctx->imsi, - lookup->apn_str, 1); - LOGMMCTXP(LOGL_DEBUG, mmctx, - "Going to query %s\n", hostname); - rc = sgsn_ares_query(sgsn, hostname, - ggsn_lookup_cb, lookup); - if (rc != 0) { - LOGMMCTXP(LOGL_ERROR, mmctx, "Couldn't start GGSN\n"); - goto reject_due_failure; - } - return; - } - - LOGMMCTXP(LOGL_ERROR, mmctx, "Couldn't resolve GGSN\n"); - goto reject_due_failure; - } - - if (hostent->h_length != sizeof(struct in_addr)) { - LOGMMCTXP(LOGL_ERROR, lookup->mmctx, - "Wrong addr size(%zu)\n", sizeof(struct in_addr)); - goto reject_due_failure; - } - - /* Get the first addr from the list */ - addr = (struct in_addr *) hostent->h_addr_list[0]; - if (!addr) { - LOGMMCTXP(LOGL_ERROR, lookup->mmctx, "No host address.\n"); - goto reject_due_failure; - } - - ggsn = sgsn_ggsn_ctx_alloc(UINT32_MAX); - if (!ggsn) { - LOGMMCTXP(LOGL_ERROR, lookup->mmctx, "Failed to create ggsn.\n"); - goto reject_due_failure; - } - ggsn->remote_addr = *addr; - LOGMMCTXP(LOGL_NOTICE, lookup->mmctx, - "Selected %s as GGSN.\n", inet_ntoa(*addr)); - - /* forget about the ggsn look-up */ - lookup->mmctx->ggsn_lookup = NULL; - - activate_ggsn(lookup->mmctx, ggsn, lookup->ti, lookup->nsapi, - lookup->sapi, &lookup->tp, 1); - - /* Now free it */ - talloc_free(lookup->orig_msg); - talloc_free(lookup); - return; - -reject_due_failure: - gsm48_tx_gsm_act_pdp_rej(lookup->mmctx, lookup->ti, - GMM_CAUSE_NET_FAIL, 0, NULL); - lookup->mmctx->ggsn_lookup = NULL; - talloc_free(lookup->orig_msg); - talloc_free(lookup); -} - -static int do_act_pdp_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg, bool *delete) -{ - struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); - struct gsm48_act_pdp_ctx_req *act_req = (struct gsm48_act_pdp_ctx_req *) gh->data; - uint8_t req_qos_len, req_pdpa_len; - uint8_t *req_qos, *req_pdpa; - struct tlv_parsed tp; - uint8_t transaction_id = gsm48_hdr_trans_id(gh); - struct sgsn_ggsn_ctx *ggsn; - struct sgsn_pdp_ctx *pdp; - enum gsm48_gsm_cause gsm_cause; - char apn_str[GSM_APN_LENGTH] = { 0, }; - char *hostname; - int rc; - struct gprs_llc_lle *lle; - - LOGMMCTXP(LOGL_INFO, mmctx, "-> ACTIVATE PDP CONTEXT REQ: SAPI=%u NSAPI=%u ", - act_req->req_llc_sapi, act_req->req_nsapi); - - /* FIXME: length checks! */ - req_qos_len = act_req->data[0]; - req_qos = act_req->data + 1; /* 10.5.6.5 */ - req_pdpa_len = act_req->data[1 + req_qos_len]; - req_pdpa = act_req->data + 1 + req_qos_len + 1; /* 10.5.6.4 */ - - switch (req_pdpa[0] & 0xf) { - case 0x0: - DEBUGPC(DMM, "ETSI "); - break; - case 0x1: - DEBUGPC(DMM, "IETF "); - break; - case 0xf: - DEBUGPC(DMM, "Empty "); - break; - } - - switch (req_pdpa[1]) { - case 0x21: - DEBUGPC(DMM, "IPv4 "); - if (req_pdpa_len >= 6) { - struct in_addr ia; - ia.s_addr = ntohl(*((uint32_t *) (req_pdpa+2))); - DEBUGPC(DMM, "%s ", inet_ntoa(ia)); - } - break; - case 0x57: - DEBUGPC(DMM, "IPv6 "); - if (req_pdpa_len >= 18) { - /* FIXME: print IPv6 address */ - } - break; - default: - DEBUGPC(DMM, "0x%02x ", req_pdpa[1]); - break; - } - - LOGPC(DMM, LOGL_INFO, "\n"); - - /* Check if NSAPI is out of range (TS 04.65 / 7.2) */ - if (act_req->req_nsapi < 5 || act_req->req_nsapi > 15) { - /* Send reject with GSM_CAUSE_INV_MAND_INFO */ - return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, - GSM_CAUSE_INV_MAND_INFO, - 0, NULL); - } - - /* Optional: Access Point Name, Protocol Config Options */ - if (req_pdpa + req_pdpa_len < msg->data + msg->len) - tlv_parse(&tp, &gsm48_sm_att_tlvdef, req_pdpa + req_pdpa_len, - (msg->data + msg->len) - (req_pdpa + req_pdpa_len), 0, 0); - else - memset(&tp, 0, sizeof(tp)); - - - /* put the non-TLV elements in the TLV parser structure to - * pass them on to the SGSN / GTP code */ - tp.lv[OSMO_IE_GSM_REQ_QOS].len = req_qos_len; - tp.lv[OSMO_IE_GSM_REQ_QOS].val = req_qos; - tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].len = req_pdpa_len; - tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].val = req_pdpa; - - /* Check if NSAPI is already in use */ - pdp = sgsn_pdp_ctx_by_nsapi(mmctx, act_req->req_nsapi); - if (pdp) { - /* We already have a PDP context for this TLLI + NSAPI tuple */ - if (pdp->sapi == act_req->req_llc_sapi && - pdp->ti == transaction_id) { - /* This apparently is a re-transmission of a PDP CTX - * ACT REQ (our ACT ACK must have got dropped) */ - rc = gsm48_tx_gsm_act_pdp_acc(pdp); - if (rc < 0) - return rc; - - if (pdp->mm->ran_type == MM_CTX_T_GERAN_Gb) { - /* Also re-transmit the SNDCP XID message */ - lle = &pdp->mm->gb.llme->lle[pdp->sapi]; - rc = sndcp_sn_xid_req(lle,pdp->nsapi); - if (rc < 0) - return rc; - } - - return 0; - } - - /* Send reject with GSM_CAUSE_NSAPI_IN_USE */ - return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, - GSM_CAUSE_NSAPI_IN_USE, - 0, NULL); - } - - if (mmctx->ggsn_lookup) { - if (mmctx->ggsn_lookup->sapi == act_req->req_llc_sapi && - mmctx->ggsn_lookup->ti == transaction_id) { - LOGMMCTXP(LOGL_NOTICE, mmctx, - "Re-transmission while doing look-up. Ignoring.\n"); - return 0; - } - } - - /* Only increment counter for a real activation, after we checked - * for re-transmissions */ - rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PDP_CTX_ACT]); - - /* Determine GGSN based on APN and subscription options */ - ggsn = sgsn_mm_ctx_find_ggsn_ctx(mmctx, &tp, &gsm_cause, apn_str); - if (ggsn) - return activate_ggsn(mmctx, ggsn, transaction_id, - act_req->req_nsapi, act_req->req_llc_sapi, - &tp, 0); - - if (strlen(apn_str) == 0) - goto no_context; - if (!sgsn->cfg.dynamic_lookup) - goto no_context; - - /* schedule a dynamic look-up */ - mmctx->ggsn_lookup = talloc_zero(tall_bsc_ctx, struct sgsn_ggsn_lookup); - if (!mmctx->ggsn_lookup) - goto no_context; - - mmctx->ggsn_lookup->state = SGSN_GGSN_2DIGIT; - mmctx->ggsn_lookup->mmctx = mmctx; - strcpy(mmctx->ggsn_lookup->apn_str, apn_str); - - mmctx->ggsn_lookup->orig_msg = msg; - mmctx->ggsn_lookup->tp = tp; - - mmctx->ggsn_lookup->ti = transaction_id; - mmctx->ggsn_lookup->nsapi = act_req->req_nsapi; - mmctx->ggsn_lookup->sapi = act_req->req_llc_sapi; - - hostname = osmo_apn_qualify_from_imsi(mmctx->imsi, - mmctx->ggsn_lookup->apn_str, 0); - - LOGMMCTXP(LOGL_DEBUG, mmctx, "Going to query %s\n", hostname); - rc = sgsn_ares_query(sgsn, hostname, - ggsn_lookup_cb, mmctx->ggsn_lookup); - if (rc != 0) { - LOGMMCTXP(LOGL_ERROR, mmctx, "Failed to start ares query.\n"); - goto no_context; - } - *delete = 0; - - return 0; - -no_context: - LOGMMCTXP(LOGL_ERROR, mmctx, "No GGSN context found!\n"); - return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, - gsm_cause, 0, NULL); -} - -/* Section 9.5.1: Activate PDP Context Request */ -static int gsm48_rx_gsm_act_pdp_req(struct sgsn_mm_ctx *mmctx, - struct msgb *_msg) -{ - bool delete = 1; - struct msgb *msg; - int rc; - - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_REQUEST]); - - /* - * This is painful. We might not have a static GGSN - * configuration and then would need to copy the msg - * and re-do most of this routine (or call it again - * and make sure it only goes through the dynamic - * resolving. The question is what to optimize for - * and the dynamic resolution will be the right thing - * in the long run. - */ - msg = gprs_msgb_copy(_msg, __func__); - if (!msg) { - struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(_msg); - uint8_t transaction_id = gsm48_hdr_trans_id(gh); - - LOGMMCTXP(LOGL_ERROR, mmctx, "-> ACTIVATE PDP CONTEXT REQ failed copy.\n"); - /* Send reject with GSM_CAUSE_INV_MAND_INFO */ - return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, - GSM_CAUSE_NET_FAIL, - 0, NULL); - } - - rc = do_act_pdp_req(mmctx, msg, &delete); - if (delete) - msgb_free(msg); - return rc; -} - -/* Section 9.5.8: Deactivate PDP Context Request */ -static int gsm48_rx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, struct msgb *msg) -{ - struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); - uint8_t transaction_id = gsm48_hdr_trans_id(gh); - struct sgsn_pdp_ctx *pdp; - - LOGMMCTXP(LOGL_INFO, mm, "-> DEACTIVATE PDP CONTEXT REQ (cause: %s)\n", - get_value_string(gsm48_gsm_cause_names, gh->data[0])); - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_UL_DEACTIVATE_REQUEST]); - - pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); - if (!pdp) { - LOGMMCTXP(LOGL_NOTICE, mm, "Deactivate PDP Context Request for " - "non-existing PDP Context (IMSI=%s, TI=%u)\n", - mm->imsi, transaction_id); - return _gsm48_tx_gsm_deact_pdp_acc(mm, transaction_id); - } - - return sgsn_delete_pdp_ctx(pdp); -} - -/* Section 9.5.9: Deactivate PDP Context Accept */ -static int gsm48_rx_gsm_deact_pdp_ack(struct sgsn_mm_ctx *mm, struct msgb *msg) -{ - struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); - uint8_t transaction_id = gsm48_hdr_trans_id(gh); - struct sgsn_pdp_ctx *pdp; - - LOGMMCTXP(LOGL_INFO, mm, "-> DEACTIVATE PDP CONTEXT ACK\n"); - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_UL_DEACTIVATE_ACCEPT]); - - pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); - if (!pdp) { - LOGMMCTXP(LOGL_NOTICE, mm, "Deactivate PDP Context Accept for " - "non-existing PDP Context (IMSI=%s, TI=%u)\n", - mm->imsi, transaction_id); - return 0; - } - /* stop timer 3395 */ - pdpctx_timer_stop(pdp, 3395); - return sgsn_delete_pdp_ctx(pdp); -} - -static int gsm48_rx_gsm_status(struct sgsn_mm_ctx *ctx, struct msgb *msg) -{ - struct gsm48_hdr *gh = msgb_l3(msg); - - LOGMMCTXP(LOGL_INFO, ctx, "-> GPRS SM STATUS (cause: %s)\n", - get_value_string(gsm48_gsm_cause_names, gh->data[0])); - - return 0; -} - -static void pdpctx_timer_cb(void *_pdp) -{ - struct sgsn_pdp_ctx *pdp = _pdp; - - pdp->num_T_exp++; - - switch (pdp->T) { - case 3395: /* waiting for PDP CTX DEACT ACK */ - if (pdp->num_T_exp >= 4) { - LOGPDPCTXP(LOGL_NOTICE, pdp, "T3395 expired >= 5 times\n"); - pdp->state = PDP_STATE_INACTIVE; - sgsn_delete_pdp_ctx(pdp); - break; - } - gsm48_tx_gsm_deact_pdp_req(pdp, GSM_CAUSE_NET_FAIL); - break; - default: - LOGPDPCTXP(LOGL_ERROR, pdp, "timer expired in unknown mode %u\n", - pdp->T); - } -} - - -/* GPRS Session Management */ -static int gsm0408_rcv_gsm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, - struct gprs_llc_llme *llme) -{ - struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); - int rc; - - /* MMCTX can be NULL when called */ - - if (!mmctx) { - LOGP(DMM, LOGL_NOTICE, "Cannot handle SM for unknown MM CTX\n"); - /* 6.1.3.6 */ - if (gh->msg_type == GSM48_MT_GSM_STATUS) - return 0; - - return gsm0408_gprs_force_reattach_oldmsg(msg, llme); - } - - switch (gh->msg_type) { - case GSM48_MT_GSM_ACT_PDP_REQ: - rc = gsm48_rx_gsm_act_pdp_req(mmctx, msg); - break; - case GSM48_MT_GSM_DEACT_PDP_REQ: - rc = gsm48_rx_gsm_deact_pdp_req(mmctx, msg); - break; - case GSM48_MT_GSM_DEACT_PDP_ACK: - rc = gsm48_rx_gsm_deact_pdp_ack(mmctx, msg); - break; - case GSM48_MT_GSM_STATUS: - rc = gsm48_rx_gsm_status(mmctx, msg); - break; - case GSM48_MT_GSM_REQ_PDP_ACT_REJ: - case GSM48_MT_GSM_ACT_AA_PDP_REQ: - case GSM48_MT_GSM_DEACT_AA_PDP_REQ: - LOGMMCTXP(LOGL_NOTICE, mmctx, "Unimplemented GSM 04.08 GSM msg type 0x%02x: %s\n", - gh->msg_type, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg))); - rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); - break; - default: - LOGMMCTXP(LOGL_NOTICE, mmctx, "Unknown GSM 04.08 GSM msg type 0x%02x: %s\n", - gh->msg_type, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg))); - rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); - break; - - } - - return rc; -} - -int gsm0408_gprs_force_reattach_oldmsg(struct msgb *msg, - struct gprs_llc_llme *llme) -{ - int rc; - if (llme) - gprs_llgmm_reset_oldmsg(msg, GPRS_SAPI_GMM, llme); - - rc = gsm48_tx_gmm_detach_req_oldmsg( - msg, GPRS_DET_T_MT_REATT_REQ, GMM_CAUSE_IMPL_DETACHED); - - return rc; -} - -int gsm0408_gprs_force_reattach(struct sgsn_mm_ctx *mmctx) -{ - int rc; - if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) - gprs_llgmm_reset(mmctx->gb.llme); - - rc = gsm48_tx_gmm_detach_req( - mmctx, GPRS_DET_T_MT_REATT_REQ, GMM_CAUSE_IMPL_DETACHED); - - mm_ctx_cleanup_free(mmctx, "forced reattach"); - - return rc; -} - -/* Main entry point for incoming 04.08 GPRS messages from Iu */ -int gsm0408_gprs_rcvmsg_iu(struct msgb *msg, struct gprs_ra_id *ra_id, - uint16_t *sai) -{ - struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); - uint8_t pdisc = gsm48_hdr_pdisc(gh); - struct sgsn_mm_ctx *mmctx; - int rc = -EINVAL; - - mmctx = sgsn_mm_ctx_by_ue_ctx(msg->dst); - if (mmctx) { - rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); - if (ra_id) - memcpy(&mmctx->ra, ra_id, sizeof(mmctx->ra)); - } - - /* MMCTX can be NULL */ - - switch (pdisc) { - case GSM48_PDISC_MM_GPRS: - rc = gsm0408_rcv_gmm(mmctx, msg, NULL, false); -#warning "set drop_cipherable arg for gsm0408_rcv_gmm() from IuPS?" - break; - case GSM48_PDISC_SM_GPRS: - rc = gsm0408_rcv_gsm(mmctx, msg, NULL); - break; - default: - LOGMMCTXP(LOGL_NOTICE, mmctx, - "Unknown GSM 04.08 discriminator 0x%02x: %s\n", - pdisc, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg))); - /* FIXME: return status message */ - break; - } - - /* MMCTX can be invalid */ - - return rc; -} - -/* Main entry point for incoming 04.08 GPRS messages from Gb */ -int gsm0408_gprs_rcvmsg_gb(struct msgb *msg, struct gprs_llc_llme *llme, - bool drop_cipherable) -{ - struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); - uint8_t pdisc = gsm48_hdr_pdisc(gh); - struct sgsn_mm_ctx *mmctx; - struct gprs_ra_id ra_id; - int rc = -EINVAL; - - bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); - mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &ra_id); - if (mmctx) { - msgid2mmctx(mmctx, msg); - rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); - mmctx->gb.llme = llme; - } - - /* MMCTX can be NULL */ - - switch (pdisc) { - case GSM48_PDISC_MM_GPRS: - rc = gsm0408_rcv_gmm(mmctx, msg, llme, drop_cipherable); - break; - case GSM48_PDISC_SM_GPRS: - rc = gsm0408_rcv_gsm(mmctx, msg, llme); - break; - default: - LOGMMCTXP(LOGL_NOTICE, mmctx, - "Unknown GSM 04.08 discriminator 0x%02x: %s\n", - pdisc, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg))); - /* FIXME: return status message */ - break; - } - - /* MMCTX can be invalid */ - - return rc; -} - -int gprs_gmm_rx_suspend(struct gprs_ra_id *raid, uint32_t tlli) -{ - struct sgsn_mm_ctx *mmctx; - - mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); - if (!mmctx) { - LOGP(DMM, LOGL_NOTICE, "SUSPEND request for unknown " - "TLLI=%08x\n", tlli); - return -EINVAL; - } - - if (mmctx->gmm_state != GMM_REGISTERED_NORMAL && - mmctx->gmm_state != GMM_REGISTERED_SUSPENDED) { - LOGMMCTXP(LOGL_NOTICE, mmctx, "SUSPEND request while state " - "!= REGISTERED (TLLI=%08x)\n", tlli); - return -EINVAL; - } - - /* Transition from REGISTERED_NORMAL to REGISTERED_SUSPENDED */ - mmctx->gmm_state = GMM_REGISTERED_SUSPENDED; - return 0; -} - -int gprs_gmm_rx_resume(struct gprs_ra_id *raid, uint32_t tlli, - uint8_t suspend_ref) -{ - struct sgsn_mm_ctx *mmctx; - - /* FIXME: make use of suspend reference? */ - - mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); - if (!mmctx) { - LOGP(DMM, LOGL_NOTICE, "RESUME request for unknown " - "TLLI=%08x\n", tlli); - return -EINVAL; - } - - if (mmctx->gmm_state != GMM_REGISTERED_NORMAL && - mmctx->gmm_state != GMM_REGISTERED_SUSPENDED) { - LOGMMCTXP(LOGL_NOTICE, mmctx, "RESUME request while state " - "!= SUSPENDED (TLLI=%08x)\n", tlli); - /* FIXME: should we not simply ignore it? */ - return -EINVAL; - } - - /* Transition from SUSPENDED to NORMAL */ - mmctx->gmm_state = GMM_REGISTERED_NORMAL; - return 0; -} - -#ifdef BUILD_IU -int iu_rab_act_ps(uint8_t rab_id, struct sgsn_pdp_ctx *pdp, bool use_x213_nsap) -{ - struct msgb *msg; - struct sgsn_mm_ctx *mm = pdp->mm; - struct ue_conn_ctx *uectx; - uint32_t ggsn_ip; - - uectx = mm->iu.ue_ctx; - - /* Get the IP address for ggsn user plane */ - memcpy(&ggsn_ip, pdp->lib->gsnru.v, pdp->lib->gsnru.l); - ggsn_ip = htonl(ggsn_ip); - - LOGP(DRANAP, LOGL_DEBUG, "Assigning RAB: rab_id=%d, ggsn_ip=%x," - " teid_gn=%x, use_x213_nsap=%d\n", - rab_id, ggsn_ip, pdp->lib->teid_gn, use_x213_nsap); - - msg = ranap_new_msg_rab_assign_data(rab_id, ggsn_ip, - pdp->lib->teid_gn, use_x213_nsap); - msg->l2h = msg->data; - return iu_rab_act(uectx, msg); -} -#endif diff --git a/openbsc/src/gprs/gprs_llc.c b/openbsc/src/gprs/gprs_llc.c deleted file mode 100644 index 2be663f98..000000000 --- a/openbsc/src/gprs/gprs_llc.c +++ /dev/null @@ -1,1132 +0,0 @@ -/* GPRS LLC protocol implementation as per 3GPP TS 04.64 */ - -/* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org> - * - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <errno.h> -#include <stdint.h> -#include <stdbool.h> - -#include <openssl/rand.h> - -#include <osmocom/core/msgb.h> -#include <osmocom/core/linuxlist.h> -#include <osmocom/core/timer.h> -#include <osmocom/core/talloc.h> -#include <osmocom/core/rate_ctr.h> -#include <osmocom/gprs/gprs_bssgp.h> - -#include <openbsc/gsm_data.h> -#include <openbsc/debug.h> -#include <openbsc/gprs_sgsn.h> -#include <openbsc/gprs_gmm.h> -#include <openbsc/gprs_llc.h> -#include <openbsc/crc24.h> -#include <openbsc/sgsn.h> -#include <openbsc/gsm_subscriber.h> -#include <openbsc/gprs_llc_xid.h> -#include <openbsc/gprs_sndcp_comp.h> -#include <openbsc/gprs_sndcp.h> - -static struct gprs_llc_llme *llme_alloc(uint32_t tlli); -static int gprs_llc_tx_xid(struct gprs_llc_lle *lle, struct msgb *msg, - int command); -static int gprs_llc_tx_u(struct msgb *msg, uint8_t sapi, - int command, enum gprs_llc_u_cmd u_cmd, int pf_bit); - -/* BEGIN XID RELATED */ - -/* Generate XID message */ -static int gprs_llc_generate_xid(uint8_t *bytes, int bytes_len, - struct gprs_llc_xid_field *l3_xid_field, - struct gprs_llc_llme *llme) -{ - /* Note: Called by gprs_ll_xid_req() */ - - LLIST_HEAD(xid_fields); - - struct gprs_llc_xid_field xid_version; - struct gprs_llc_xid_field xid_n201u; - struct gprs_llc_xid_field xid_n201i; - - xid_version.type = GPRS_LLC_XID_T_VERSION; - xid_version.data = (uint8_t *) "\x00"; - xid_version.data_len = 1; - - xid_n201u.type = GPRS_LLC_XID_T_N201_U; - xid_n201u.data = (uint8_t *) "\x05\xf0"; - xid_n201u.data_len = 2; - - xid_n201i.type = GPRS_LLC_XID_T_N201_I; - xid_n201i.data = (uint8_t *) "\x05\xf0"; - xid_n201i.data_len = 2; - - /* Add locally managed XID Fields */ - llist_add(&xid_version.list, &xid_fields); - llist_add(&xid_n201u.list, &xid_fields); - llist_add(&xid_n201i.list, &xid_fields); - - /* Append layer 3 XID field (if present) */ - if (l3_xid_field) { - /* Enforce layer 3 XID type (just to be sure) */ - l3_xid_field->type = GPRS_LLC_XID_T_L3_PAR; - - /* Add Layer 3 XID field to the list */ - llist_add(&l3_xid_field->list, &xid_fields); - } - - /* Store generated XID for later reference */ - talloc_free(llme->xid); - llme->xid = gprs_llc_copy_xid(llme, &xid_fields); - - return gprs_llc_compile_xid(bytes, bytes_len, &xid_fields); -} - -/* Generate XID message that will cause the GMM to reset */ -static int gprs_llc_generate_xid_for_gmm_reset(uint8_t *bytes, - int bytes_len, uint32_t iov_ui, - struct gprs_llc_llme *llme) -{ - /* Called by gprs_llgmm_reset() and - * gprs_llgmm_reset_oldmsg() */ - - LLIST_HEAD(xid_fields); - - struct gprs_llc_xid_field xid_reset; - struct gprs_llc_xid_field xid_iovui; - - /* First XID component must be RESET */ - xid_reset.type = GPRS_LLC_XID_T_RESET; - xid_reset.data = NULL; - xid_reset.data_len = 0; - - /* Add new IOV-UI */ - xid_iovui.type = GPRS_LLC_XID_T_IOV_UI; - xid_iovui.data = (uint8_t *) & iov_ui; - xid_iovui.data_len = 4; - - /* Add locally managed XID Fields */ - llist_add(&xid_iovui.list, &xid_fields); - llist_add(&xid_reset.list, &xid_fields); - - /* Store generated XID for later reference */ - talloc_free(llme->xid); - llme->xid = gprs_llc_copy_xid(llme, &xid_fields); - - return gprs_llc_compile_xid(bytes, bytes_len, &xid_fields); -} - -/* Process an incoming XID confirmation */ -static int gprs_llc_process_xid_conf(uint8_t *bytes, int bytes_len, - struct gprs_llc_lle *lle) -{ - /* Note: This function handles the response of a network originated - * XID-Request. There XID messages reflected by the MS are analyzed - * and processed here. The caller is called by rx_llc_xid(). */ - - struct llist_head *xid_fields; - struct gprs_llc_xid_field *xid_field; - struct gprs_llc_xid_field *xid_field_request; - struct gprs_llc_xid_field *xid_field_request_l3 = NULL; - - /* Pick layer3 XID from the XID request we have sent last */ - if (lle->llme->xid) { - llist_for_each_entry(xid_field_request, lle->llme->xid, list) { - if (xid_field_request->type == GPRS_LLC_XID_T_L3_PAR) - xid_field_request_l3 = xid_field_request; - } - } - - /* Parse and analyze XID-Response */ - xid_fields = gprs_llc_parse_xid(NULL, bytes, bytes_len); - - if (xid_fields) { - - gprs_llc_dump_xid_fields(xid_fields, LOGL_DEBUG); - llist_for_each_entry(xid_field, xid_fields, list) { - - /* Forward SNDCP-XID fields to Layer 3 (SNDCP) */ - if (xid_field->type == GPRS_LLC_XID_T_L3_PAR && - xid_field_request_l3) { - sndcp_sn_xid_conf(xid_field, - xid_field_request_l3, lle); - } - - /* Process LLC-XID fields: */ - else { - - /* FIXME: Do something more useful with the - * echoed XID-Information. Currently we - * just ignore the response completely and - * by doing so we blindly accept any changes - * the MS might have done to the our XID - * inquiry. There is a remainig risk of - * malfunction! */ - LOGP(DLLC, LOGL_NOTICE, - "Ignoring XID-Field: XID: type %s, data_len=%d, data=%s\n", - get_value_string(gprs_llc_xid_type_names, - xid_field->type), - xid_field->data_len, - osmo_hexdump_nospc(xid_field->data, - xid_field->data_len)); - } - } - talloc_free(xid_fields); - } - - /* Flush pending XID fields */ - talloc_free(lle->llme->xid); - lle->llme->xid = NULL; - - return 0; -} - -/* Process an incoming XID indication and generate an appropiate response */ -static int gprs_llc_process_xid_ind(uint8_t *bytes_request, - int bytes_request_len, - uint8_t *bytes_response, - int bytes_response_maxlen, - struct gprs_llc_lle *lle) -{ - /* Note: This function computes the response that is sent back to the - * MS when a mobile originated XID is received. The function is - * called by rx_llc_xid() */ - - int rc = -EINVAL; - - struct llist_head *xid_fields; - struct llist_head *xid_fields_response; - - struct gprs_llc_xid_field *xid_field; - struct gprs_llc_xid_field *xid_field_response; - - /* Parse and analyze XID-Request */ - xid_fields = - gprs_llc_parse_xid(lle->llme, bytes_request, bytes_request_len); - if (xid_fields) { - xid_fields_response = talloc_zero(lle->llme, struct llist_head); - INIT_LLIST_HEAD(xid_fields_response); - gprs_llc_dump_xid_fields(xid_fields, LOGL_DEBUG); - - /* Process LLC-XID fields: */ - llist_for_each_entry(xid_field, xid_fields, list) { - - if (xid_field->type != GPRS_LLC_XID_T_L3_PAR) { - /* FIXME: Check the incoming XID parameters for - * for validity. Currently we just blindly - * accept all XID fields by just echoing them. - * There is a remaining risk of malfunction - * when a MS submits values which defer from - * the default! */ - LOGP(DLLC, LOGL_NOTICE, - "Echoing XID-Field: XID: type %s, data_len=%d, data=%s\n", - get_value_string(gprs_llc_xid_type_names, - xid_field->type), - xid_field->data_len, - osmo_hexdump_nospc(xid_field->data, - xid_field->data_len)); - xid_field_response = - gprs_llc_dup_xid_field - (lle->llme, xid_field); - llist_add(&xid_field_response->list, - xid_fields_response); - } - } - - /* Forward SNDCP-XID fields to Layer 3 (SNDCP) */ - llist_for_each_entry(xid_field, xid_fields, list) { - if (xid_field->type == GPRS_LLC_XID_T_L3_PAR) { - - xid_field_response = - talloc_zero(lle->llme, - struct gprs_llc_xid_field); - rc = sndcp_sn_xid_ind(xid_field, - xid_field_response, lle); - if (rc == 0) - llist_add(&xid_field_response->list, - xid_fields_response); - else - talloc_free(xid_field_response); - } - } - - rc = gprs_llc_compile_xid(bytes_response, - bytes_response_maxlen, - xid_fields_response); - talloc_free(xid_fields_response); - talloc_free(xid_fields); - } - - return rc; -} - -/* Dispatch XID indications and responses comming from the MS */ -static void rx_llc_xid(struct gprs_llc_lle *lle, - struct gprs_llc_hdr_parsed *gph) -{ - uint8_t response[1024]; - int response_len; - - /* FIXME: 8.5.3.3: check if XID is invalid */ - if (gph->is_cmd) { - LOGP(DLLC, LOGL_NOTICE, - "Received XID indication from MS.\n"); - - struct msgb *resp; - uint8_t *xid; - resp = msgb_alloc_headroom(4096, 1024, "LLC_XID"); - - response_len = - gprs_llc_process_xid_ind(gph->data, gph->data_len, - response, sizeof(response), - lle); - if (response_len < 0) { - LOGP(DLLC, LOGL_ERROR, - "invalid XID indication received!\n"); - } else { - xid = msgb_put(resp, response_len); - memcpy(xid, response, response_len); - } - gprs_llc_tx_xid(lle, resp, 0); - } else { - LOGP(DLLC, LOGL_NOTICE, - "Received XID confirmation from MS.\n"); - gprs_llc_process_xid_conf(gph->data, gph->data_len, lle); - /* FIXME: if we had sent a XID reset, send - * LLGMM-RESET.conf to GMM */ - } -} - -/* Set of LL-XID negotiation (See also: TS 101 351, Section 7.2.2.4) */ -int gprs_ll_xid_req(struct gprs_llc_lle *lle, - struct gprs_llc_xid_field *l3_xid_field) -{ - /* Note: This functions is calle from gprs_sndcp.c */ - - uint8_t xid_bytes[1024];; - int xid_bytes_len; - uint8_t *xid; - struct msgb *msg; - const char *ftype; - - /* Generate XID */ - xid_bytes_len = - gprs_llc_generate_xid(xid_bytes, sizeof(xid_bytes), - l3_xid_field, lle->llme); - - /* Only perform XID sending if the XID message contains something */ - if (xid_bytes_len > 0) { - /* Transmit XID bytes */ - msg = msgb_alloc_headroom(4096, 1024, "LLC_XID"); - xid = msgb_put(msg, xid_bytes_len); - memcpy(xid, xid_bytes, xid_bytes_len); - if (l3_xid_field) - ftype = get_value_string(gprs_llc_xid_type_names, - l3_xid_field->type); - else - ftype = "NULL"; - LOGP(DLLC, LOGL_NOTICE, "Sending XID type %s (%d bytes) request" - " to MS...\n", ftype, xid_bytes_len); - gprs_llc_tx_xid(lle, msg, 1); - } else { - LOGP(DLLC, LOGL_ERROR, - "XID-Message generation failed, XID not sent!\n"); - return -EINVAL; - } - - return 0; -} -/* END XID RELATED */ - - - - -/* Entry function from upper level (LLC), asking us to transmit a BSSGP PDU - * to a remote MS (identified by TLLI) at a BTS identified by its BVCI and NSEI */ -static int _bssgp_tx_dl_ud(struct msgb *msg, struct sgsn_mm_ctx *mmctx) -{ - struct bssgp_dl_ud_par dup; - const uint8_t qos_profile_default[3] = { 0x00, 0x00, 0x20 }; - - memset(&dup, 0, sizeof(dup)); - /* before we have received some identity from the MS, we might - * not yet have a MMC context (e.g. XID negotiation of primarly - * LLC connection from GMM sapi). */ - if (mmctx) { - dup.imsi = mmctx->imsi; - dup.drx_parms = mmctx->drx_parms; - dup.ms_ra_cap.len = mmctx->ms_radio_access_capa.len; - dup.ms_ra_cap.v = mmctx->ms_radio_access_capa.buf; - - /* make sure we only send it to the right llme */ - OSMO_ASSERT(msgb_tlli(msg) == mmctx->gb.llme->tlli - || msgb_tlli(msg) == mmctx->gb.llme->old_tlli); - } - memcpy(&dup.qos_profile, qos_profile_default, - sizeof(qos_profile_default)); - - return bssgp_tx_dl_ud(msg, 1000, &dup); -} - - -/* Section 8.9.9 LLC layer parameter default values */ -static const struct gprs_llc_params llc_default_params[NUM_SAPIS] = { - [1] = { - .t200_201 = 5, - .n200 = 3, - .n201_u = 400, - }, - [2] = { - .t200_201 = 5, - .n200 = 3, - .n201_u = 270, - }, - [3] = { - .iov_i_exp = 27, - .t200_201 = 5, - .n200 = 3, - .n201_u = 500, - .n201_i = 1503, - .mD = 1520, - .mU = 1520, - .kD = 16, - .kU = 16, - }, - [5] = { - .iov_i_exp = 27, - .t200_201 = 10, - .n200 = 3, - .n201_u = 500, - .n201_i = 1503, - .mD = 760, - .mU = 760, - .kD = 8, - .kU = 8, - }, - [7] = { - .t200_201 = 20, - .n200 = 3, - .n201_u = 270, - }, - [8] = { - .t200_201 = 20, - .n200 = 3, - .n201_u = 270, - }, - [9] = { - .iov_i_exp = 27, - .t200_201 = 20, - .n200 = 3, - .n201_u = 500, - .n201_i = 1503, - .mD = 380, - .mU = 380, - .kD = 4, - .kU = 4, - }, - [11] = { - .iov_i_exp = 27, - .t200_201 = 40, - .n200 = 3, - .n201_u = 500, - .n201_i = 1503, - .mD = 190, - .mU = 190, - .kD = 2, - .kU = 2, - }, -}; - -LLIST_HEAD(gprs_llc_llmes); -void *llc_tall_ctx; - -/* lookup LLC Entity based on DLCI (TLLI+SAPI tuple) */ -static struct gprs_llc_lle *lle_by_tlli_sapi(const uint32_t tlli, uint8_t sapi) -{ - struct gprs_llc_llme *llme; - - llist_for_each_entry(llme, &gprs_llc_llmes, list) { - if (llme->tlli == tlli || llme->old_tlli == tlli) - return &llme->lle[sapi]; - } - return NULL; -} - -struct gprs_llc_lle *gprs_lle_get_or_create(const uint32_t tlli, uint8_t sapi) -{ - struct gprs_llc_llme *llme; - struct gprs_llc_lle *lle; - - lle = lle_by_tlli_sapi(tlli, sapi); - if (lle) - return lle; - - LOGP(DLLC, LOGL_NOTICE, "LLC: unknown TLLI 0x%08x, " - "creating LLME on the fly\n", tlli); - llme = llme_alloc(tlli); - lle = &llme->lle[sapi]; - return lle; -} - -struct llist_head *gprs_llme_list(void) -{ - return &gprs_llc_llmes; -} - -/* lookup LLC Entity for RX based on DLCI (TLLI+SAPI tuple) */ -static struct gprs_llc_lle *lle_for_rx_by_tlli_sapi(const uint32_t tlli, - uint8_t sapi, enum gprs_llc_cmd cmd) -{ - struct gprs_llc_lle *lle; - - /* We already know about this TLLI */ - lle = lle_by_tlli_sapi(tlli, sapi); - if (lle) - return lle; - - /* Maybe it is a routing area update but we already know this sapi? */ - if (gprs_tlli_type(tlli) == TLLI_FOREIGN) { - lle = lle_by_tlli_sapi(tlli, sapi); - if (lle) { - LOGP(DLLC, LOGL_NOTICE, - "LLC RX: Found a local entry for TLLI 0x%08x\n", - tlli); - return lle; - } - } - - /* 7.2.1.1 LLC belonging to unassigned TLLI+SAPI shall be discarded, - * except UID and XID frames with SAPI=1 */ - if (sapi == GPRS_SAPI_GMM && - (cmd == GPRS_LLC_XID || cmd == GPRS_LLC_UI)) { - struct gprs_llc_llme *llme; - /* FIXME: don't use the TLLI but the 0xFFFF unassigned? */ - llme = llme_alloc(tlli); - LOGP(DLLC, LOGL_NOTICE, "LLC RX: unknown TLLI 0x%08x, " - "creating LLME on the fly\n", tlli); - lle = &llme->lle[sapi]; - return lle; - } - - LOGP(DLLC, LOGL_NOTICE, - "unknown TLLI(0x%08x)/SAPI(%d): Silently dropping\n", - tlli, sapi); - return NULL; -} - -static void lle_init(struct gprs_llc_llme *llme, uint8_t sapi) -{ - struct gprs_llc_lle *lle = &llme->lle[sapi]; - - lle->llme = llme; - lle->sapi = sapi; - lle->state = GPRS_LLES_UNASSIGNED; - - /* Initialize according to parameters */ - memcpy(&lle->params, &llc_default_params[sapi], sizeof(lle->params)); -} - -static struct gprs_llc_llme *llme_alloc(uint32_t tlli) -{ - struct gprs_llc_llme *llme; - uint32_t i; - - llme = talloc_zero(llc_tall_ctx, struct gprs_llc_llme); - if (!llme) - return NULL; - - llme->tlli = tlli; - llme->old_tlli = 0xffffffff; - llme->state = GPRS_LLMS_UNASSIGNED; - llme->age_timestamp = GPRS_LLME_RESET_AGE; - llme->cksn = GSM_KEY_SEQ_INVAL; - - for (i = 0; i < ARRAY_SIZE(llme->lle); i++) - lle_init(llme, i); - - llist_add(&llme->list, &gprs_llc_llmes); - - llme->comp.proto = gprs_sndcp_comp_alloc(llme); - llme->comp.data = gprs_sndcp_comp_alloc(llme); - - return llme; -} - -static void llme_free(struct gprs_llc_llme *llme) -{ - gprs_sndcp_comp_free(llme->comp.proto); - gprs_sndcp_comp_free(llme->comp.data); - talloc_free(llme->xid); - llist_del(&llme->list); - talloc_free(llme); -} - -#if 0 -/* FIXME: Unused code... */ -static void t200_expired(void *data) -{ - struct gprs_llc_lle *lle = data; - - /* 8.5.1.3: Expiry of T200 */ - - if (lle->retrans_ctr >= lle->params.n200) { - /* FIXME: LLGM-STATUS-IND, LL-RELEASE-IND/CNF */ - lle->state = GPRS_LLES_ASSIGNED_ADM; - } - - switch (lle->state) { - case GPRS_LLES_LOCAL_EST: - /* FIXME: retransmit SABM */ - /* FIXME: re-start T200 */ - lle->retrans_ctr++; - break; - case GPRS_LLES_LOCAL_REL: - /* FIXME: retransmit DISC */ - /* FIXME: re-start T200 */ - lle->retrans_ctr++; - break; - default: - LOGP(DLLC, LOGL_ERROR, "LLC unhandled state: %d\n", lle->state); - break; - } - -} - -static void t201_expired(void *data) -{ - struct gprs_llc_lle *lle = data; - - if (lle->retrans_ctr < lle->params.n200) { - /* FIXME: transmit apropriate supervisory frame (8.6.4.1) */ - /* FIXME: set timer T201 */ - lle->retrans_ctr++; - } -} -#endif - -int gprs_llc_tx_u(struct msgb *msg, uint8_t sapi, int command, - enum gprs_llc_u_cmd u_cmd, int pf_bit) -{ - uint8_t *fcs, *llch; - uint8_t addr, ctrl; - uint32_t fcs_calc; - - /* Identifiers from UP: (TLLI, SAPI) + (BVCI, NSEI) */ - - /* Address Field */ - addr = sapi & 0xf; - if (command) - addr |= 0x40; - - /* 6.3 Figure 8 */ - ctrl = 0xe0 | u_cmd; - if (pf_bit) - ctrl |= 0x10; - - /* prepend LLC UI header */ - llch = msgb_push(msg, 2); - llch[0] = addr; - llch[1] = ctrl; - - /* append FCS to end of frame */ - fcs = msgb_put(msg, 3); - fcs_calc = gprs_llc_fcs(llch, fcs - llch); - fcs[0] = fcs_calc & 0xff; - fcs[1] = (fcs_calc >> 8) & 0xff; - fcs[2] = (fcs_calc >> 16) & 0xff; - - /* Identifiers passed down: (BVCI, NSEI) */ - - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_LLC_DL_PACKETS]); - rate_ctr_add(&sgsn->rate_ctrs->ctr[CTR_LLC_DL_BYTES], msg->len); - - /* Send BSSGP-DL-UNITDATA.req */ - return _bssgp_tx_dl_ud(msg, NULL); -} - -/* Send XID response to LLE */ -static int gprs_llc_tx_xid(struct gprs_llc_lle *lle, struct msgb *msg, - int command) -{ - /* copy identifiers from LLE to ensure lower layers can route */ - msgb_tlli(msg) = lle->llme->tlli; - msgb_bvci(msg) = lle->llme->bvci; - msgb_nsei(msg) = lle->llme->nsei; - - return gprs_llc_tx_u(msg, lle->sapi, command, GPRS_LLC_U_XID, 1); -} - -/* encrypt information field + FCS, if needed! */ -static int apply_gea(struct gprs_llc_lle *lle, uint16_t crypt_len, uint16_t nu, - uint32_t oc, uint8_t sapi, uint8_t *fcs, uint8_t *data) -{ - uint8_t cipher_out[GSM0464_CIPH_MAX_BLOCK]; - - if (lle->llme->algo == GPRS_ALGO_GEA0) - return -EINVAL; - - /* Compute the 'Input' Paraemeter */ - uint32_t fcs_calc, iv = gprs_cipher_gen_input_ui(lle->llme->iov_ui, sapi, - nu, oc); - /* Compute gamma that we need to XOR with the data */ - int r = gprs_cipher_run(cipher_out, crypt_len, lle->llme->algo, - lle->llme->kc, iv, - fcs ? GPRS_CIPH_SGSN2MS : GPRS_CIPH_MS2SGSN); - if (r < 0) { - LOGP(DLLC, LOGL_ERROR, "Error producing %s gamma for UI " - "frame: %d\n", get_value_string(gprs_cipher_names, - lle->llme->algo), r); - return -ENOMSG; - } - - if (fcs) { - /* Mark frame as encrypted and update FCS */ - data[2] |= 0x02; - fcs_calc = gprs_llc_fcs(data, fcs - data); - fcs[0] = fcs_calc & 0xff; - fcs[1] = (fcs_calc >> 8) & 0xff; - fcs[2] = (fcs_calc >> 16) & 0xff; - data += 3; - } - - /* XOR the cipher output with the data */ - for (r = 0; r < crypt_len; r++) - *(data + r) ^= cipher_out[r]; - - return 0; -} - -/* Transmit a UI frame over the given SAPI: - 'encryptable' indicates whether particular message can be encrypted according - to 3GPP TS 24.008 § 4.7.1.2 - */ -int gprs_llc_tx_ui(struct msgb *msg, uint8_t sapi, int command, - struct sgsn_mm_ctx *mmctx, bool encryptable) -{ - struct gprs_llc_lle *lle; - uint8_t *fcs, *llch; - uint8_t addr, ctrl[2]; - uint32_t fcs_calc; - uint16_t nu = 0; - uint32_t oc; - - /* Identifiers from UP: (TLLI, SAPI) + (BVCI, NSEI) */ - - /* look-up or create the LL Entity for this (TLLI, SAPI) tuple */ - lle = gprs_lle_get_or_create(msgb_tlli(msg), sapi); - - if (msg->len > lle->params.n201_u) { - LOGP(DLLC, LOGL_ERROR, "Cannot Tx %u bytes (N201-U=%u)\n", - msg->len, lle->params.n201_u); - msgb_free(msg); - return -EFBIG; - } - - gprs_llme_copy_key(mmctx, lle->llme); - - /* Update LLE's (BVCI, NSEI) tuple */ - lle->llme->bvci = msgb_bvci(msg); - lle->llme->nsei = msgb_nsei(msg); - - /* Obtain current values for N(u) and OC */ - nu = lle->vu_send; - oc = lle->oc_ui_send; - /* Increment V(U) */ - lle->vu_send = (lle->vu_send + 1) % 512; - /* Increment Overflow Counter, if needed */ - if ((lle->vu_send + 1) / 512) - lle->oc_ui_send += 512; - - /* Address Field */ - addr = sapi & 0xf; - if (command) - addr |= 0x40; - - /* Control Field */ - ctrl[0] = 0xc0; - ctrl[0] |= nu >> 6; - ctrl[1] = (nu << 2) & 0xfc; - ctrl[1] |= 0x01; /* Protected Mode */ - - /* prepend LLC UI header */ - llch = msgb_push(msg, 3); - llch[0] = addr; - llch[1] = ctrl[0]; - llch[2] = ctrl[1]; - - /* append FCS to end of frame */ - fcs = msgb_put(msg, 3); - fcs_calc = gprs_llc_fcs(llch, fcs - llch); - fcs[0] = fcs_calc & 0xff; - fcs[1] = (fcs_calc >> 8) & 0xff; - fcs[2] = (fcs_calc >> 16) & 0xff; - - if (lle->llme->algo != GPRS_ALGO_GEA0 && encryptable) { - int rc = apply_gea(lle, fcs - llch, nu, oc, sapi, fcs, llch); - if (rc < 0) { - msgb_free(msg); - return rc; - } - } - - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_LLC_DL_PACKETS]); - rate_ctr_add(&sgsn->rate_ctrs->ctr[CTR_LLC_DL_BYTES], msg->len); - - /* Identifiers passed down: (BVCI, NSEI) */ - - /* Send BSSGP-DL-UNITDATA.req */ - return _bssgp_tx_dl_ud(msg, mmctx); -} - -static int gprs_llc_hdr_rx(struct gprs_llc_hdr_parsed *gph, - struct gprs_llc_lle *lle) -{ - switch (gph->cmd) { - case GPRS_LLC_SABM: /* Section 6.4.1.1 */ - lle->v_sent = lle->v_ack = lle->v_recv = 0; - if (lle->state == GPRS_LLES_ASSIGNED_ADM) { - /* start re-establishment (8.7.1) */ - } - lle->state = GPRS_LLES_REMOTE_EST; - /* FIXME: Send UA */ - lle->state = GPRS_LLES_ABM; - /* FIXME: process data */ - break; - case GPRS_LLC_DISC: /* Section 6.4.1.2 */ - /* FIXME: Send UA */ - /* terminate ABM */ - lle->state = GPRS_LLES_ASSIGNED_ADM; - break; - case GPRS_LLC_UA: /* Section 6.4.1.3 */ - if (lle->state == GPRS_LLES_LOCAL_EST) - lle->state = GPRS_LLES_ABM; - break; - case GPRS_LLC_DM: /* Section 6.4.1.4: ABM cannot be performed */ - if (lle->state == GPRS_LLES_LOCAL_EST) - lle->state = GPRS_LLES_ASSIGNED_ADM; - break; - case GPRS_LLC_FRMR: /* Section 6.4.1.5 */ - break; - case GPRS_LLC_XID: /* Section 6.4.1.6 */ - rx_llc_xid(lle, gph); - break; - case GPRS_LLC_UI: - if (gprs_llc_is_retransmit(gph->seq_tx, lle->vu_recv)) { - LOGP(DLLC, LOGL_NOTICE, - "TLLI=%08x dropping UI, N(U=%d) not in window V(URV(UR:%d).\n", - lle->llme ? lle->llme->tlli : -1, - gph->seq_tx, lle->vu_recv); - - /* HACK: non-standard recovery handling. If remote LLE - * is re-transmitting the same sequence number for - * three times, don't discard the frame but pass it on - * and 'learn' the new sequence number */ - if (gph->seq_tx != lle->vu_recv_last) { - lle->vu_recv_last = gph->seq_tx; - lle->vu_recv_duplicates = 0; - } else { - lle->vu_recv_duplicates++; - if (lle->vu_recv_duplicates < 3) - return -EIO; - LOGP(DLLC, LOGL_NOTICE, "TLLI=%08x recovering " - "N(U=%d) after receiving %u duplicates\n", - lle->llme ? lle->llme->tlli : -1, - gph->seq_tx, lle->vu_recv_duplicates); - } - } - /* Increment the sequence number that we expect in the next frame */ - lle->vu_recv = (gph->seq_tx + 1) % 512; - /* Increment Overflow Counter */ - if ((gph->seq_tx + 1) / 512) - lle->oc_ui_recv += 512; - break; - default: - LOGP(DLLC, LOGL_NOTICE, "Unhandled command: %d\n", gph->cmd); - break; - } - - return 0; -} - -/* receive an incoming LLC PDU (BSSGP-UL-UNITDATA-IND, 7.2.4.2) */ -int gprs_llc_rcvmsg(struct msgb *msg, struct tlv_parsed *tv) -{ - struct gprs_llc_hdr *lh = (struct gprs_llc_hdr *) msgb_llch(msg); - struct gprs_llc_hdr_parsed llhp; - struct gprs_llc_lle *lle = NULL; - bool drop_cipherable = false; - int rc = 0; - - /* Identifiers from DOWN: NSEI, BVCI, TLLI */ - - memset(&llhp, 0, sizeof(llhp)); - rc = gprs_llc_hdr_parse(&llhp, (uint8_t *) lh, TLVP_LEN(tv, BSSGP_IE_LLC_PDU)); - if (rc < 0) { - LOGP(DLLC, LOGL_NOTICE, "Error during LLC header parsing\n"); - return rc; - } - - switch (gprs_tlli_type(msgb_tlli(msg))) { - case TLLI_LOCAL: - case TLLI_FOREIGN: - case TLLI_RANDOM: - case TLLI_AUXILIARY: - break; - default: - LOGP(DLLC, LOGL_ERROR, - "Discarding frame with strange TLLI type\n"); - break; - } - - /* find the LLC Entity for this TLLI+SAPI tuple */ - lle = lle_for_rx_by_tlli_sapi(msgb_tlli(msg), llhp.sapi, llhp.cmd); - if (!lle) { - switch (llhp.sapi) { - case GPRS_SAPI_SNDCP3: - case GPRS_SAPI_SNDCP5: - case GPRS_SAPI_SNDCP9: - case GPRS_SAPI_SNDCP11: - /* Ask an upper layer for help. */ - return gsm0408_gprs_force_reattach_oldmsg(msg, NULL); - default: - break; - } - return 0; - } - gprs_llc_hdr_dump(&llhp, lle); - /* reset age computation */ - lle->llme->age_timestamp = GPRS_LLME_RESET_AGE; - - /* decrypt information field + FCS, if needed! */ - if (llhp.is_encrypted) { - if (lle->llme->algo != GPRS_ALGO_GEA0) { - rc = apply_gea(lle, llhp.data_len + 3, llhp.seq_tx, - lle->oc_ui_recv, lle->sapi, NULL, - llhp.data); - if (rc < 0) - return rc; - llhp.fcs = *(llhp.data + llhp.data_len); - llhp.fcs |= *(llhp.data + llhp.data_len + 1) << 8; - llhp.fcs |= *(llhp.data + llhp.data_len + 2) << 16; - } else { - LOGP(DLLC, LOGL_NOTICE, "encrypted frame for LLC that " - "has no KC/Algo! Dropping.\n"); - return 0; - } - } else { - if (lle->llme->algo != GPRS_ALGO_GEA0 && - lle->llme->cksn != GSM_KEY_SEQ_INVAL) - drop_cipherable = true; - } - - /* We have to do the FCS check _after_ decryption */ - llhp.fcs_calc = gprs_llc_fcs((uint8_t *)lh, llhp.crc_length); - if (llhp.fcs != llhp.fcs_calc) { - LOGP(DLLC, LOGL_INFO, "Dropping frame with invalid FCS\n"); - return -EIO; - } - - /* Update LLE's (BVCI, NSEI) tuple */ - lle->llme->bvci = msgb_bvci(msg); - lle->llme->nsei = msgb_nsei(msg); - - /* Receive and Process the actual LLC frame */ - rc = gprs_llc_hdr_rx(&llhp, lle); - if (rc < 0) - return rc; - - rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_LLC_UL_PACKETS]); - rate_ctr_add(&sgsn->rate_ctrs->ctr[CTR_LLC_UL_BYTES], msg->len); - - /* llhp.data is only set when we need to send LL_[UNIT]DATA_IND up */ - if (llhp.cmd == GPRS_LLC_UI && llhp.data && llhp.data_len) { - msgb_gmmh(msg) = llhp.data; - switch (llhp.sapi) { - case GPRS_SAPI_GMM: - /* send LL_UNITDATA_IND to GMM */ - rc = gsm0408_gprs_rcvmsg_gb(msg, lle->llme, - drop_cipherable); - break; - case GPRS_SAPI_SNDCP3: - case GPRS_SAPI_SNDCP5: - case GPRS_SAPI_SNDCP9: - case GPRS_SAPI_SNDCP11: - /* send LL_DATA_IND/LL_UNITDATA_IND to SNDCP */ - rc = sndcp_llunitdata_ind(msg, lle, llhp.data, llhp.data_len); - break; - case GPRS_SAPI_SMS: - /* FIXME */ - case GPRS_SAPI_TOM2: - case GPRS_SAPI_TOM8: - /* FIXME: send LL_DATA_IND/LL_UNITDATA_IND to TOM */ - default: - LOGP(DLLC, LOGL_NOTICE, "Unsupported SAPI %u\n", llhp.sapi); - rc = -EINVAL; - break; - } - } - - return rc; -} - -/* Propagate crypto parameters MM -> LLME */ -void gprs_llme_copy_key(struct sgsn_mm_ctx *mm, struct gprs_llc_llme *llme) -{ - if (!mm) - return; - if (mm->ciph_algo != GPRS_ALGO_GEA0) { - llme->algo = mm->ciph_algo; - if (llme->cksn != mm->auth_triplet.key_seq && - mm->auth_triplet.key_seq != GSM_KEY_SEQ_INVAL) { - memcpy(llme->kc, mm->auth_triplet.vec.kc, - gprs_cipher_key_length(mm->ciph_algo)); - llme->cksn = mm->auth_triplet.key_seq; - } - } else - llme->cksn = GSM_KEY_SEQ_INVAL; -} - -/* 04.64 Chapter 7.2.1.1 LLGMM-ASSIGN */ -int gprs_llgmm_assign(struct gprs_llc_llme *llme, - uint32_t old_tlli, uint32_t new_tlli) -{ - unsigned int i; - - if (old_tlli == 0xffffffff && new_tlli != 0xffffffff) { - /* TLLI Assignment 8.3.1 */ - /* New TLLI shall be assigned and used when (re)transmitting LLC frames */ - /* If old TLLI != 0xffffffff was assigned to LLME, then TLLI - * old is unassigned. Only TLLI new shall be accepted when - * received from peer. */ - if (llme->old_tlli != 0xffffffff) { - llme->old_tlli = 0xffffffff; - llme->tlli = new_tlli; - } else { - /* If TLLI old == 0xffffffff was assigned to LLME, then this is - * TLLI assignmemt according to 8.3.1 */ - llme->old_tlli = 0xffffffff; - llme->tlli = new_tlli; - llme->state = GPRS_LLMS_ASSIGNED; - /* 8.5.3.1 For all LLE's */ - for (i = 0; i < ARRAY_SIZE(llme->lle); i++) { - struct gprs_llc_lle *l = &llme->lle[i]; - l->vu_send = l->vu_recv = 0; - l->retrans_ctr = 0; - l->state = GPRS_LLES_ASSIGNED_ADM; - /* FIXME Set parameters according to table 9 */ - } - } - } else if (old_tlli != 0xffffffff && new_tlli != 0xffffffff) { - /* TLLI Change 8.3.2 */ - /* Both TLLI Old and TLLI New are assigned; use New when - * (re)transmitting. Accept both Old and New on Rx */ - llme->old_tlli = old_tlli; - llme->tlli = new_tlli; - llme->state = GPRS_LLMS_ASSIGNED; - } else if (old_tlli != 0xffffffff && new_tlli == 0xffffffff) { - /* TLLI Unassignment 8.3.3) */ - llme->tlli = llme->old_tlli = 0; - llme->state = GPRS_LLMS_UNASSIGNED; - for (i = 0; i < ARRAY_SIZE(llme->lle); i++) { - struct gprs_llc_lle *l = &llme->lle[i]; - l->state = GPRS_LLES_UNASSIGNED; - } - llme_free(llme); - } else - return -EINVAL; - - return 0; -} - -/* TLLI unassignment */ -int gprs_llgmm_unassign(struct gprs_llc_llme *llme) -{ - return gprs_llgmm_assign(llme, llme->tlli, 0xffffffff); -} - -/* Chapter 7.2.1.2 LLGMM-RESET.req */ -int gprs_llgmm_reset(struct gprs_llc_llme *llme) -{ - struct msgb *msg = msgb_alloc_headroom(4096, 1024, "LLC_XID"); - struct gprs_llc_lle *lle = &llme->lle[1]; - uint8_t xid_bytes[1024]; - int xid_bytes_len; - uint8_t *xid; - - LOGP(DLLC, LOGL_NOTICE, "LLGM Reset\n"); - if (RAND_bytes((uint8_t *) &llme->iov_ui, 4) != 1) { - LOGP(DLLC, LOGL_NOTICE, "RAND_bytes failed for LLC XID reset, " - "falling back to rand()\n"); - llme->iov_ui = rand(); - } - - /* Generate XID message */ - xid_bytes_len = gprs_llc_generate_xid_for_gmm_reset(xid_bytes, - sizeof(xid_bytes),llme->iov_ui,llme); - if (xid_bytes_len < 0) - return -EINVAL; - xid = msgb_put(msg, xid_bytes_len); - memcpy(xid, xid_bytes, xid_bytes_len); - - /* Reset some of the LLC parameters. See GSM 04.64, 8.5.3.1 */ - lle->vu_recv = 0; - lle->vu_send = 0; - lle->oc_ui_send = 0; - lle->oc_ui_recv = 0; - - /* FIXME: Start T200, wait for XID response */ - return gprs_llc_tx_xid(lle, msg, 1); -} - -int gprs_llgmm_reset_oldmsg(struct msgb* oldmsg, uint8_t sapi, - struct gprs_llc_llme *llme) -{ - struct msgb *msg = msgb_alloc_headroom(4096, 1024, "LLC_XID"); - uint8_t xid_bytes[1024]; - int xid_bytes_len; - uint8_t *xid; - - LOGP(DLLC, LOGL_NOTICE, "LLGM Reset\n"); - if (RAND_bytes((uint8_t *) &llme->iov_ui, 4) != 1) { - LOGP(DLLC, LOGL_NOTICE, "RAND_bytes failed for LLC XID reset, " - "falling back to rand()\n"); - llme->iov_ui = rand(); - } - - /* Generate XID message */ - xid_bytes_len = gprs_llc_generate_xid_for_gmm_reset(xid_bytes, - sizeof(xid_bytes),llme->iov_ui,llme); - if (xid_bytes_len < 0) - return -EINVAL; - xid = msgb_put(msg, xid_bytes_len); - memcpy(xid, xid_bytes, xid_bytes_len); - - /* FIXME: Start T200, wait for XID response */ - - msgb_tlli(msg) = msgb_tlli(oldmsg); - msgb_bvci(msg) = msgb_bvci(oldmsg); - msgb_nsei(msg) = msgb_nsei(oldmsg); - - return gprs_llc_tx_u(msg, sapi, 1, GPRS_LLC_U_XID, 1); -} - -int gprs_llc_init(const char *cipher_plugin_path) -{ - return gprs_cipher_load(cipher_plugin_path); -} diff --git a/openbsc/src/gprs/gprs_llc_parse.c b/openbsc/src/gprs/gprs_llc_parse.c deleted file mode 100644 index a5a7a7122..000000000 --- a/openbsc/src/gprs/gprs_llc_parse.c +++ /dev/null @@ -1,251 +0,0 @@ -/* GPRS LLC protocol implementation as per 3GPP TS 04.64 */ - -/* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org> - * - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <errno.h> -#include <stdint.h> - -#include <osmocom/core/msgb.h> -#include <osmocom/core/linuxlist.h> -#include <osmocom/core/timer.h> -#include <osmocom/core/talloc.h> -#include <osmocom/gprs/gprs_bssgp.h> - -#include <openbsc/gsm_data.h> -#include <openbsc/debug.h> -#include <openbsc/gprs_sgsn.h> -#include <openbsc/gprs_gmm.h> -#include <openbsc/gprs_llc.h> -#include <openbsc/crc24.h> - -static const struct value_string llc_cmd_strs[] = { - { GPRS_LLC_NULL, "NULL" }, - { GPRS_LLC_RR, "RR" }, - { GPRS_LLC_ACK, "ACK" }, - { GPRS_LLC_RNR, "RNR" }, - { GPRS_LLC_SACK, "SACK" }, - { GPRS_LLC_DM, "DM" }, - { GPRS_LLC_DISC, "DISC" }, - { GPRS_LLC_UA, "UA" }, - { GPRS_LLC_SABM, "SABM" }, - { GPRS_LLC_FRMR, "FRMR" }, - { GPRS_LLC_XID, "XID" }, - { GPRS_LLC_UI, "UI" }, - { 0, NULL } -}; - -#define LLC_ALLOC_SIZE 16384 -#define UI_HDR_LEN 3 -#define N202 4 -#define CRC24_LENGTH 3 - -int gprs_llc_fcs(uint8_t *data, unsigned int len) -{ - uint32_t fcs_calc; - - fcs_calc = crc24_calc(INIT_CRC24, data, len); - fcs_calc = ~fcs_calc; - fcs_calc &= 0xffffff; - - return fcs_calc; -} - -void gprs_llc_hdr_dump(struct gprs_llc_hdr_parsed *gph, struct gprs_llc_lle *lle) -{ - const char *gea; - uint32_t iov_ui = 0; - if (lle) { - gea = get_value_string(gprs_cipher_names, lle->llme->algo); - iov_ui = lle->llme->iov_ui; - } else - gea = "GEA?"; - DEBUGP(DLLC, "LLC SAPI=%u %c %c %c %s IOV-UI=0x%06x FCS=0x%06x ", - gph->sapi, gph->is_cmd ? 'C' : 'R', gph->ack_req ? 'A' : ' ', - gph->is_encrypted ? 'E' : 'U', - gea, iov_ui, gph->fcs); - - if (gph->cmd) - DEBUGPC(DLLC, "CMD=%s ", get_value_string(llc_cmd_strs, gph->cmd)); - - if (gph->data) - DEBUGPC(DLLC, "DATA "); - - DEBUGPC(DLLC, "\n"); -} - -/* parse a GPRS LLC header, also check for invalid frames */ -int gprs_llc_hdr_parse(struct gprs_llc_hdr_parsed *ghp, - uint8_t *llc_hdr, int len) -{ - uint8_t *ctrl = llc_hdr+1; - - if (len <= CRC24_LENGTH) - return -EIO; - - ghp->crc_length = len - CRC24_LENGTH; - - ghp->ack_req = 0; - - /* Section 5.5: FCS */ - ghp->fcs = *(llc_hdr + len - 3); - ghp->fcs |= *(llc_hdr + len - 2) << 8; - ghp->fcs |= *(llc_hdr + len - 1) << 16; - - /* Section 6.2.1: invalid PD field */ - if (llc_hdr[0] & 0x80) - return -EIO; - - /* This only works for the MS->SGSN direction */ - if (llc_hdr[0] & 0x40) - ghp->is_cmd = 0; - else - ghp->is_cmd = 1; - - ghp->sapi = llc_hdr[0] & 0xf; - - /* Section 6.2.3: check for reserved SAPI */ - switch (ghp->sapi) { - case 0: - case 4: - case 6: - case 0xa: - case 0xc: - case 0xd: - case 0xf: - return -EINVAL; - } - - if ((ctrl[0] & 0x80) == 0) { - /* I (Information transfer + Supervisory) format */ - uint8_t k; - - ghp->data = ctrl + 3; - - if (ctrl[0] & 0x40) - ghp->ack_req = 1; - - ghp->seq_tx = (ctrl[0] & 0x1f) << 4; - ghp->seq_tx |= (ctrl[1] >> 4); - - ghp->seq_rx = (ctrl[1] & 0x7) << 6; - ghp->seq_rx |= (ctrl[2] >> 2); - - switch (ctrl[2] & 0x03) { - case 0: - ghp->cmd = GPRS_LLC_RR; - break; - case 1: - ghp->cmd = GPRS_LLC_ACK; - break; - case 2: - ghp->cmd = GPRS_LLC_RNR; - break; - case 3: - ghp->cmd = GPRS_LLC_SACK; - k = ctrl[3] & 0x1f; - ghp->data += 1 + k; - break; - } - ghp->data_len = (llc_hdr + len - 3) - ghp->data; - } else if ((ctrl[0] & 0xc0) == 0x80) { - /* S (Supervisory) format */ - ghp->data = NULL; - ghp->data_len = 0; - - if (ctrl[0] & 0x20) - ghp->ack_req = 1; - ghp->seq_rx = (ctrl[0] & 0x7) << 6; - ghp->seq_rx |= (ctrl[1] >> 2); - - switch (ctrl[1] & 0x03) { - case 0: - ghp->cmd = GPRS_LLC_RR; - break; - case 1: - ghp->cmd = GPRS_LLC_ACK; - break; - case 2: - ghp->cmd = GPRS_LLC_RNR; - break; - case 3: - ghp->cmd = GPRS_LLC_SACK; - break; - } - } else if ((ctrl[0] & 0xe0) == 0xc0) { - /* UI (Unconfirmed Inforamtion) format */ - ghp->cmd = GPRS_LLC_UI; - ghp->data = ctrl + 2; - ghp->data_len = (llc_hdr + len - 3) - ghp->data; - - ghp->seq_tx = (ctrl[0] & 0x7) << 6; - ghp->seq_tx |= (ctrl[1] >> 2); - if (ctrl[1] & 0x02) { - ghp->is_encrypted = 1; - /* FIXME: encryption */ - } - if (ctrl[1] & 0x01) { - /* FCS over hdr + all inf fields */ - } else { - /* FCS over hdr + N202 octets (4) */ - if (ghp->crc_length > UI_HDR_LEN + N202) - ghp->crc_length = UI_HDR_LEN + N202; - } - } else { - /* U (Unnumbered) format: 1 1 1 P/F M4 M3 M2 M1 */ - ghp->data = NULL; - ghp->data_len = 0; - - switch (ctrl[0] & 0xf) { - case GPRS_LLC_U_NULL_CMD: - ghp->cmd = GPRS_LLC_NULL; - break; - case GPRS_LLC_U_DM_RESP: - ghp->cmd = GPRS_LLC_DM; - break; - case GPRS_LLC_U_DISC_CMD: - ghp->cmd = GPRS_LLC_DISC; - break; - case GPRS_LLC_U_UA_RESP: - ghp->cmd = GPRS_LLC_UA; - break; - case GPRS_LLC_U_SABM_CMD: - ghp->cmd = GPRS_LLC_SABM; - break; - case GPRS_LLC_U_FRMR_RESP: - ghp->cmd = GPRS_LLC_FRMR; - break; - case GPRS_LLC_U_XID: - ghp->cmd = GPRS_LLC_XID; - ghp->data = ctrl + 1; - ghp->data_len = (llc_hdr + len - 3) - ghp->data; - break; - default: - return -EIO; - } - } - - /* FIXME: parse sack frame */ - if (ghp->cmd == GPRS_LLC_SACK) { - LOGP(DLLC, LOGL_NOTICE, "Unsupported SACK frame\n"); - return -EIO; - } - - return 0; -} diff --git a/openbsc/src/gprs/gprs_llc_vty.c b/openbsc/src/gprs/gprs_llc_vty.c deleted file mode 100644 index bf34e9782..000000000 --- a/openbsc/src/gprs/gprs_llc_vty.c +++ /dev/null @@ -1,116 +0,0 @@ -/* VTY interface for our GPRS LLC implementation */ - -/* (C) 2010 by Harald Welte <laforge@gnumonks.org> - * - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <stdlib.h> -#include <unistd.h> -#include <errno.h> -#include <stdint.h> -#include <time.h> - -#include <arpa/inet.h> - -#include <openbsc/gsm_data.h> -#include <osmocom/core/msgb.h> -#include <osmocom/gsm/tlv.h> -#include <osmocom/core/talloc.h> -#include <osmocom/core/select.h> -#include <osmocom/core/rate_ctr.h> -#include <openbsc/debug.h> -#include <openbsc/signal.h> -#include <openbsc/gprs_llc.h> - -#include <osmocom/vty/vty.h> -#include <osmocom/vty/command.h> - -struct value_string gprs_llc_state_strs[] = { - { GPRS_LLES_UNASSIGNED, "TLLI Unassigned" }, - { GPRS_LLES_ASSIGNED_ADM, "TLLI Assigned" }, - { GPRS_LLES_LOCAL_EST, "Local Establishment" }, - { GPRS_LLES_REMOTE_EST, "Remote Establishment" }, - { GPRS_LLES_ABM, "Asynchronous Balanced Mode" }, - { GPRS_LLES_LOCAL_REL, "Local Release" }, - { GPRS_LLES_TIMER_REC, "Timer Recovery" }, - { 0, NULL } -}; - -static void vty_dump_lle(struct vty *vty, struct gprs_llc_lle *lle) -{ - struct gprs_llc_params *par = &lle->params; - vty_out(vty, " SAPI %2u State %s VUsend=%u, VUrecv=%u", lle->sapi, - get_value_string(gprs_llc_state_strs, lle->state), - lle->vu_send, lle->vu_recv); - vty_out(vty, " Vsent=%u Vack=%u Vrecv=%u, RetransCtr=%u%s", - lle->v_sent, lle->v_ack, lle->v_recv, - lle->retrans_ctr, VTY_NEWLINE); - vty_out(vty, " T200=%u, N200=%u, N201-U=%u, N201-I=%u, mD=%u, " - "mU=%u, kD=%u, kU=%u%s", par->t200_201, par->n200, - par->n201_u, par->n201_i, par->mD, par->mU, par->kD, - par->kU, VTY_NEWLINE); -} - -static uint8_t valid_sapis[] = { 1, 2, 3, 5, 7, 8, 9, 11 }; - -static void vty_dump_llme(struct vty *vty, struct gprs_llc_llme *llme) -{ - unsigned int i; - struct timespec now_tp = {0}; - clock_gettime(CLOCK_MONOTONIC, &now_tp); - - vty_out(vty, "TLLI %08x (Old TLLI %08x) BVCI=%u NSEI=%u %s: " - "IOV-UI=0x%06x CKSN=%d Age=%d: State %s%s", llme->tlli, - llme->old_tlli, llme->bvci, llme->nsei, - get_value_string(gprs_cipher_names, llme->algo), llme->iov_ui, - llme->cksn, llme->age_timestamp == GPRS_LLME_RESET_AGE ? 0 : - (int)(now_tp.tv_sec - (time_t)llme->age_timestamp), - get_value_string(gprs_llc_state_strs, llme->state), VTY_NEWLINE); - - for (i = 0; i < ARRAY_SIZE(valid_sapis); i++) { - struct gprs_llc_lle *lle; - uint8_t sapi = valid_sapis[i]; - - if (sapi >= ARRAY_SIZE(llme->lle)) - continue; - - lle = &llme->lle[sapi]; - vty_dump_lle(vty, lle); - } -} - - -DEFUN(show_llc, show_llc_cmd, - "show llc", - SHOW_STR "Display information about the LLC protocol") -{ - struct gprs_llc_llme *llme; - - vty_out(vty, "State of LLC Entities%s", VTY_NEWLINE); - llist_for_each_entry(llme, &gprs_llc_llmes, list) { - vty_dump_llme(vty, llme); - } - return CMD_SUCCESS; -} - -int gprs_llc_vty_init(void) -{ - install_element_ve(&show_llc_cmd); - - return 0; -} diff --git a/openbsc/src/gprs/gprs_llc_xid.c b/openbsc/src/gprs/gprs_llc_xid.c deleted file mode 100644 index fe631715a..000000000 --- a/openbsc/src/gprs/gprs_llc_xid.c +++ /dev/null @@ -1,281 +0,0 @@ -/* GPRS LLC XID field encoding/decoding as per 3GPP TS 44.064 */ - -/* (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> - * All Rights Reserved - * - * Author: Philipp Maier - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <stdio.h> -#include <string.h> -#include <stdint.h> -#include <errno.h> - -#include <osmocom/core/utils.h> -#include <osmocom/core/linuxlist.h> -#include <osmocom/core/talloc.h> -#include <osmocom/core/msgb.h> -#include <osmocom/core/talloc.h> - -#include <openbsc/debug.h> -#include <openbsc/gprs_llc.h> -#include <openbsc/sgsn.h> -#include <openbsc/gprs_llc_xid.h> - -const struct value_string gprs_llc_xid_type_names[] = { - { GPRS_LLC_XID_T_VERSION, "VERSION"}, - { GPRS_LLC_XID_T_IOV_UI, "IOV_UI"}, - { GPRS_LLC_XID_T_IOV_I, "IOV_I"}, - { GPRS_LLC_XID_T_T200, "T200"}, - { GPRS_LLC_XID_T_N200, "N200"}, - { GPRS_LLC_XID_T_N201_U, "N201_"}, - { GPRS_LLC_XID_T_N201_I, "N201_I"}, - { GPRS_LLC_XID_T_mD, "mD"}, - { GPRS_LLC_XID_T_mU, "mU"}, - { GPRS_LLC_XID_T_kD, "kD"}, - { GPRS_LLC_XID_T_kU, "kU"}, - { GPRS_LLC_XID_T_L3_PAR, "L3_PAR"}, - { GPRS_LLC_XID_T_RESET, "RESET"}, - { 0, NULL }, -}; - -/* Parse XID parameter field */ -static int decode_xid_field(struct gprs_llc_xid_field *xid_field, - const uint8_t *src, uint8_t src_len) -{ - uint8_t xl; - uint8_t type; - uint8_t len; - int src_counter = 0; - - /* Exit immediately if it is clear that no - * parseable data is present */ - if (src_len < 1 || !src) - return -EINVAL; - - /* Extract header info */ - xl = (*src >> 7) & 1; - type = (*src >> 2) & 0x1F; - - /* Extract length field */ - len = (*src) & 0x3; - src++; - src_counter++; - if (xl) { - if (src_len < 2) - return -EINVAL; - len = (len << 6) & 0xC0; - len |= ((*src) >> 2) & 0x3F; - src++; - src_counter++; - } - - /* Fill out struct */ - xid_field->type = type; - xid_field->data_len = len; - if (len > 0) { - if (src_len < src_counter + len) - return -EINVAL; - xid_field->data = - talloc_memdup(xid_field,src,xid_field->data_len); - } else - xid_field->data = NULL; - - /* Return consumed length */ - return src_counter + len; -} - -/* Encode XID parameter field */ -static int encode_xid_field(uint8_t *dst, int dst_maxlen, - const struct gprs_llc_xid_field *xid_field) -{ - int xl = 0; - - /* When the length does not fit into 2 bits, - * we need extended length fields */ - if (xid_field->data_len > 3) - xl = 1; - - /* Exit immediately if it is clear that no - * encoding result can be stored */ - if (dst_maxlen < xid_field->data_len + 1 + xl) - return -EINVAL; - - /* There are only 5 bits reserved for the type, exit on exceed */ - if (xid_field->type > 31) - return -EINVAL; - - /* Encode header */ - memset(dst, 0, dst_maxlen); - if (xl) - dst[0] |= 0x80; - dst[0] |= (((xid_field->type) & 0x1F) << 2); - - if (xl) { - dst[0] |= (((xid_field->data_len) >> 6) & 0x03); - dst[1] = ((xid_field->data_len) << 2) & 0xFC; - } else - dst[0] |= ((xid_field->data_len) & 0x03); - - /* Append payload data */ - if (xid_field->data && xid_field->data_len) - memcpy(dst + 1 + xl, xid_field->data, xid_field->data_len); - - /* Return generated length */ - return xid_field->data_len + 1 + xl; -} - -/* Transform a list with XID fields into a XID message (dst) */ -int gprs_llc_compile_xid(uint8_t *dst, int dst_maxlen, - const struct llist_head *xid_fields) -{ - struct gprs_llc_xid_field *xid_field; - int rc; - int byte_counter = 0; - - OSMO_ASSERT(xid_fields); - OSMO_ASSERT(dst); - - llist_for_each_entry_reverse(xid_field, xid_fields, list) { - /* Encode XID-Field */ - rc = encode_xid_field(dst, dst_maxlen, xid_field); - if (rc < 0) - return -EINVAL; - - /* Advance pointer and lower maxlen for the - * next encoding round */ - dst += rc; - byte_counter += rc; - dst_maxlen -= rc; - } - - /* Return generated length */ - return byte_counter; -} - -/* Transform a XID message (dst) into a list of XID fields */ -struct llist_head *gprs_llc_parse_xid(const void *ctx, const uint8_t *src, - int src_len) -{ - struct gprs_llc_xid_field *xid_field; - struct llist_head *xid_fields; - - int rc; - int max_loops = src_len; - - OSMO_ASSERT(src); - - xid_fields = talloc_zero(ctx, struct llist_head); - INIT_LLIST_HEAD(xid_fields); - - while (1) { - /* Bail in case decode_xid_field() constantly returns zero */ - if (max_loops <= 0) { - talloc_free(xid_fields); - return NULL; - } - - /* Decode XID field */ - xid_field = talloc_zero(xid_fields, struct gprs_llc_xid_field); - rc = decode_xid_field(xid_field, src, src_len); - - /* Immediately stop on error */ - if (rc < 0) { - talloc_free(xid_fields); - return NULL; - } - - /* Add parsed XID field to list */ - llist_add(&xid_field->list, xid_fields); - - /* Advance pointer and lower dst_len for the next - * decoding round */ - src += rc; - src_len -= rc; - - /* We are (scuccessfully) done when no further byes are left */ - if (src_len == 0) - return xid_fields; - - max_loops--; - } -} - -/* Create a duplicate of an XID-Field */ -struct gprs_llc_xid_field *gprs_llc_dup_xid_field(const void *ctx, const struct - gprs_llc_xid_field - *xid_field) -{ - struct gprs_llc_xid_field *dup; - - OSMO_ASSERT(xid_field); - - /* Create a copy of the XID field in memory */ - dup = talloc_memdup(ctx, xid_field, sizeof(*xid_field)); - dup->data = talloc_memdup(ctx, xid_field->data, xid_field->data_len); - - /* Unlink duplicate from source list */ - INIT_LLIST_HEAD(&dup->list); - - return dup; -} - -/* Copy an llist with xid fields */ -struct llist_head *gprs_llc_copy_xid(const void *ctx, - const struct llist_head *xid_fields) -{ - struct gprs_llc_xid_field *xid_field; - struct llist_head *xid_fields_copy; - - OSMO_ASSERT(xid_fields); - - xid_fields_copy = talloc_zero(ctx, struct llist_head); - INIT_LLIST_HEAD(xid_fields_copy); - - /* Create duplicates and add them to the target list */ - llist_for_each_entry(xid_field, xid_fields, list) { - llist_add(&gprs_llc_dup_xid_field(ctx, xid_field)->list, - xid_fields_copy); - } - - return xid_fields_copy; -} - -/* Dump a list with XID fields (Debug) */ -void gprs_llc_dump_xid_fields(const struct llist_head *xid_fields, - unsigned int logl) -{ - struct gprs_llc_xid_field *xid_field; - - OSMO_ASSERT(xid_fields); - - llist_for_each_entry(xid_field, xid_fields, list) { - if (xid_field->data_len) { - OSMO_ASSERT(xid_field->data); - LOGP(DLLC, logl, - "XID: type %s, data_len=%d, data=%s\n", - get_value_string(gprs_llc_xid_type_names, - xid_field->type), - xid_field->data_len, - osmo_hexdump_nospc(xid_field->data, - xid_field->data_len)); - } else { - LOGP(DLLC, logl, - "XID: type=%d, data_len=%d, data=NULL\n", - xid_field->type, xid_field->data_len); - } - } -} diff --git a/openbsc/src/gprs/gprs_sgsn.c b/openbsc/src/gprs/gprs_sgsn.c deleted file mode 100644 index acaf78187..000000000 --- a/openbsc/src/gprs/gprs_sgsn.c +++ /dev/null @@ -1,923 +0,0 @@ -/* GPRS SGSN functionality */ - -/* (C) 2009 by Harald Welte <laforge@gnumonks.org> - * - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <stdint.h> - -#include <osmocom/core/linuxlist.h> -#include <osmocom/core/talloc.h> -#include <osmocom/core/timer.h> -#include <osmocom/core/rate_ctr.h> -#include <osmocom/core/stats.h> -#include <osmocom/core/backtrace.h> -#include <osmocom/gprs/gprs_ns.h> -#include <osmocom/gprs/gprs_bssgp.h> -#include <osmocom/gsm/protocol/gsm_04_08_gprs.h> -#include <osmocom/gsm/apn.h> - -#include <openbsc/gprs_subscriber.h> -#include <openbsc/debug.h> -#include <openbsc/gprs_sgsn.h> -#include <openbsc/sgsn.h> -#include <openbsc/gprs_gmm.h> -#include <openbsc/gprs_utils.h> -#include <openbsc/signal.h> -#include "openbsc/gprs_llc.h" -#include <openbsc/iu.h> - -#include <pdp.h> - -#include <time.h> - -#include <openssl/rand.h> - -#define GPRS_LLME_CHECK_TICK 30 - -extern struct sgsn_instance *sgsn; - -LLIST_HEAD(sgsn_mm_ctxts); -LLIST_HEAD(sgsn_ggsn_ctxts); -LLIST_HEAD(sgsn_apn_ctxts); -LLIST_HEAD(sgsn_pdp_ctxts); - -static const struct rate_ctr_desc mmctx_ctr_description[] = { - { "sign.packets.in", "Signalling Messages ( In)" }, - { "sign.packets.out", "Signalling Messages (Out)" }, - { "udata.packets.in", "User Data Messages ( In)" }, - { "udata.packets.out", "User Data Messages (Out)" }, - { "udata.bytes.in", "User Data Bytes ( In)" }, - { "udata.bytes.out", "User Data Bytes (Out)" }, - { "pdp_ctx_act", "PDP Context Activations " }, - { "suspend", "SUSPEND Count " }, - { "paging.ps", "Paging Packet Switched " }, - { "paging.cs", "Paging Circuit Switched " }, - { "ra_update", "Routing Area Update " }, -}; - -static const struct rate_ctr_group_desc mmctx_ctrg_desc = { - .group_name_prefix = "sgsn.mmctx", - .group_description = "SGSN MM Context Statistics", - .num_ctr = ARRAY_SIZE(mmctx_ctr_description), - .ctr_desc = mmctx_ctr_description, - .class_id = OSMO_STATS_CLASS_SUBSCRIBER, -}; - -static const struct rate_ctr_desc pdpctx_ctr_description[] = { - { "udata.packets.in", "User Data Messages ( In)" }, - { "udata.packets.out", "User Data Messages (Out)" }, - { "udata.bytes.in", "User Data Bytes ( In)" }, - { "udata.bytes.out", "User Data Bytes (Out)" }, -}; - -static const struct rate_ctr_group_desc pdpctx_ctrg_desc = { - .group_name_prefix = "sgsn.pdpctx", - .group_description = "SGSN PDP Context Statistics", - .num_ctr = ARRAY_SIZE(pdpctx_ctr_description), - .ctr_desc = pdpctx_ctr_description, - .class_id = OSMO_STATS_CLASS_SUBSCRIBER, -}; - -static const struct rate_ctr_desc sgsn_ctr_description[] = { - { "llc.dl_bytes", "Count sent LLC bytes before giving it to the bssgp layer" }, - { "llc.ul_bytes", "Count sucessful received LLC bytes (encrypt & fcs correct)" }, - { "llc.dl_packets", "Count sucessful sent LLC packets before giving it to the bssgp layer" }, - { "llc.ul_packets", "Count sucessful received LLC packets (encrypt & fcs correct)" }, - { "gprs.attach_requested", "Received attach requests" }, - { "gprs.attach_accepted", "Sent attach accepts" }, - { "gprs.attach_rejected", "Sent attach rejects" }, - { "gprs.detach_requested", "Received detach requests" }, - { "gprs.detach_acked", "Sent detach acks" }, - { "gprs.routing_area_requested", "Received routing area requests" }, - { "gprs.routing_area_requested", "Sent routing area acks" }, - { "gprs.routing_area_requested", "Sent routing area rejects" }, - { "pdp.activate_requested", "Received activate requests" }, - { "pdp.activate_rejected", "Sent activate rejects" }, - { "pdp.activate_accepted", "Sent activate accepts" }, - { "pdp.request_activated", "unused" }, - { "pdp.request_activate_rejected", "unused" }, - { "pdp.modify_requested", "unused" }, - { "pdp.modify_accepted", "unused" }, - { "pdp.dl_deactivate_requested", "Sent deactivate requests" }, - { "pdp.dl_deactivate_accepted", "Sent deactivate accepted" }, - { "pdp.ul_deactivate_requested", "Received deactivate requests" }, - { "pdp.ul_deactivate_accepted", "Received deactivate accepts" }, -}; - -static const struct rate_ctr_group_desc sgsn_ctrg_desc = { - "sgsn", - "SGSN Overall Statistics", - OSMO_STATS_CLASS_GLOBAL, - ARRAY_SIZE(sgsn_ctr_description), - sgsn_ctr_description, -}; - -void sgsn_rate_ctr_init() { - sgsn->rate_ctrs = rate_ctr_group_alloc(tall_bsc_ctx, &sgsn_ctrg_desc, 0); - OSMO_ASSERT(sgsn->rate_ctrs); -} - -/* look-up an SGSN MM context based on Iu UE context (struct ue_conn_ctx)*/ -struct sgsn_mm_ctx *sgsn_mm_ctx_by_ue_ctx(const void *uectx) -{ - struct sgsn_mm_ctx *ctx; - - llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) { - if (ctx->ran_type == MM_CTX_T_UTRAN_Iu - && uectx == ctx->iu.ue_ctx) - return ctx; - } - - return NULL; -} - -/* look-up a SGSN MM context based on TLLI + RAI */ -struct sgsn_mm_ctx *sgsn_mm_ctx_by_tlli(uint32_t tlli, - const struct gprs_ra_id *raid) -{ - struct sgsn_mm_ctx *ctx; - - llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) { - if ((tlli == ctx->gb.tlli || tlli == ctx->gb.tlli_new) && - gprs_ra_id_equals(raid, &ctx->ra)) - return ctx; - } - - return NULL; -} - -struct sgsn_mm_ctx *sgsn_mm_ctx_by_tlli_and_ptmsi(uint32_t tlli, - const struct gprs_ra_id *raid) -{ - struct sgsn_mm_ctx *ctx; - int tlli_type; - - /* TODO: Also check the P_TMSI signature to be safe. That signature - * should be different (at least with a sufficiently high probability) - * after SGSN restarts and for multiple SGSN instances. - */ - - tlli_type = gprs_tlli_type(tlli); - if (tlli_type != TLLI_FOREIGN && tlli_type != TLLI_LOCAL) - return NULL; - - llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) { - if ((gprs_tmsi2tlli(ctx->p_tmsi, tlli_type) == tlli || - gprs_tmsi2tlli(ctx->p_tmsi_old, tlli_type) == tlli) && - gprs_ra_id_equals(raid, &ctx->ra)) - return ctx; - } - - return NULL; -} - -struct sgsn_mm_ctx *sgsn_mm_ctx_by_ptmsi(uint32_t p_tmsi) -{ - struct sgsn_mm_ctx *ctx; - - llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) { - if (p_tmsi == ctx->p_tmsi || - (ctx->p_tmsi_old && ctx->p_tmsi_old == p_tmsi)) - return ctx; - } - return NULL; -} - -struct sgsn_mm_ctx *sgsn_mm_ctx_by_imsi(const char *imsi) -{ - struct sgsn_mm_ctx *ctx; - - llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) { - if (!strcmp(imsi, ctx->imsi)) - return ctx; - } - return NULL; - -} - -/* Allocate a new SGSN MM context for GERAN_Gb */ -struct sgsn_mm_ctx *sgsn_mm_ctx_alloc_gb(uint32_t tlli, - const struct gprs_ra_id *raid) -{ - struct sgsn_mm_ctx *ctx; - - ctx = talloc_zero(tall_bsc_ctx, struct sgsn_mm_ctx); - if (!ctx) - return NULL; - - memcpy(&ctx->ra, raid, sizeof(ctx->ra)); - ctx->ran_type = MM_CTX_T_GERAN_Gb; - ctx->gb.tlli = tlli; - ctx->gmm_state = GMM_DEREGISTERED; - ctx->pmm_state = MM_IDLE; - ctx->auth_triplet.key_seq = GSM_KEY_SEQ_INVAL; - ctx->ciph_algo = sgsn->cfg.cipher; - LOGMMCTXP(LOGL_DEBUG, ctx, "Allocated with %s cipher.\n", - get_value_string(gprs_cipher_names, ctx->ciph_algo)); - ctx->ctrg = rate_ctr_group_alloc(ctx, &mmctx_ctrg_desc, tlli); - if (!ctx->ctrg) { - LOGMMCTXP(LOGL_ERROR, ctx, "Cannot allocate counter group\n"); - talloc_free(ctx); - return NULL; - } - INIT_LLIST_HEAD(&ctx->pdp_list); - - llist_add(&ctx->list, &sgsn_mm_ctxts); - - return ctx; -} - -/* Allocate a new SGSN MM context */ -struct sgsn_mm_ctx *sgsn_mm_ctx_alloc_iu(void *uectx) -{ - struct sgsn_mm_ctx *ctx; - - ctx = talloc_zero(tall_bsc_ctx, struct sgsn_mm_ctx); - if (!ctx) - return NULL; - - ctx->ran_type = MM_CTX_T_UTRAN_Iu; - ctx->iu.ue_ctx = uectx; - ctx->iu.new_key = 1; - ctx->gmm_state = GMM_DEREGISTERED; - ctx->pmm_state = PMM_DETACHED; - ctx->auth_triplet.key_seq = GSM_KEY_SEQ_INVAL; - ctx->ctrg = rate_ctr_group_alloc(ctx, &mmctx_ctrg_desc, 0); - if (!ctx->ctrg) { - LOGMMCTXP(LOGL_ERROR, ctx, "Cannot allocate counter group\n"); - talloc_free(ctx); - return NULL; - } - - /* Need to get RAID from IU conn */ - ctx->ra = ctx->iu.ue_ctx->ra_id; - - INIT_LLIST_HEAD(&ctx->pdp_list); - - llist_add(&ctx->list, &sgsn_mm_ctxts); - - return ctx; -} - - -/* this is a hard _free_ function, it doesn't clean up the PDP contexts - * in libgtp! */ -static void sgsn_mm_ctx_free(struct sgsn_mm_ctx *mm) -{ - struct sgsn_pdp_ctx *pdp, *pdp2; - - /* Unlink from global list of MM contexts */ - llist_del(&mm->list); - - /* Free all PDP contexts */ - llist_for_each_entry_safe(pdp, pdp2, &mm->pdp_list, list) - sgsn_pdp_ctx_free(pdp); - - rate_ctr_group_free(mm->ctrg); - - talloc_free(mm); -} - -void sgsn_mm_ctx_cleanup_free(struct sgsn_mm_ctx *mm) -{ - struct gprs_llc_llme *llme = NULL; - uint32_t tlli = mm->gb.tlli; - struct sgsn_pdp_ctx *pdp, *pdp2; - struct sgsn_signal_data sig_data; - - if (mm->ran_type == MM_CTX_T_GERAN_Gb) - llme = mm->gb.llme; - else - OSMO_ASSERT(mm->gb.llme == NULL); - - /* Forget about ongoing look-ups */ - if (mm->ggsn_lookup) { - LOGMMCTXP(LOGL_NOTICE, mm, - "Cleaning mmctx with on-going query.\n"); - mm->ggsn_lookup->mmctx = NULL; - mm->ggsn_lookup = NULL; - } - - /* delete all existing PDP contexts for this MS */ - llist_for_each_entry_safe(pdp, pdp2, &mm->pdp_list, list) { - LOGMMCTXP(LOGL_NOTICE, mm, - "Dropping PDP context for NSAPI=%u\n", pdp->nsapi); - sgsn_pdp_ctx_terminate(pdp); - } - - if (osmo_timer_pending(&mm->timer)) { - LOGMMCTXP(LOGL_INFO, mm, "Cancelling MM timer %u\n", mm->T); - osmo_timer_del(&mm->timer); - } - - memset(&sig_data, 0, sizeof(sig_data)); - sig_data.mm = mm; - osmo_signal_dispatch(SS_SGSN, S_SGSN_MM_FREE, &sig_data); - - - /* Detach from subscriber which is possibly freed then */ - if (mm->subscr) { - struct gprs_subscr *subscr = gprs_subscr_get(mm->subscr); - gprs_subscr_cleanup(subscr); - gprs_subscr_put(subscr); - } - - sgsn_mm_ctx_free(mm); - mm = NULL; - - if (llme) { - /* TLLI unassignment, must be called after sgsn_mm_ctx_free */ - gprs_llgmm_assign(llme, tlli, 0xffffffff); - } -} - - -/* look up PDP context by MM context and NSAPI */ -struct sgsn_pdp_ctx *sgsn_pdp_ctx_by_nsapi(const struct sgsn_mm_ctx *mm, - uint8_t nsapi) -{ - struct sgsn_pdp_ctx *pdp; - - llist_for_each_entry(pdp, &mm->pdp_list, list) { - if (pdp->nsapi == nsapi) - return pdp; - } - return NULL; -} - -/* look up PDP context by MM context and transaction ID */ -struct sgsn_pdp_ctx *sgsn_pdp_ctx_by_tid(const struct sgsn_mm_ctx *mm, - uint8_t tid) -{ - struct sgsn_pdp_ctx *pdp; - - llist_for_each_entry(pdp, &mm->pdp_list, list) { - if (pdp->ti == tid) - return pdp; - } - return NULL; -} - -/* you don't want to use this directly, call sgsn_create_pdp_ctx() */ -struct sgsn_pdp_ctx *sgsn_pdp_ctx_alloc(struct sgsn_mm_ctx *mm, - uint8_t nsapi) -{ - struct sgsn_pdp_ctx *pdp; - - pdp = sgsn_pdp_ctx_by_nsapi(mm, nsapi); - if (pdp) - return NULL; - - pdp = talloc_zero(tall_bsc_ctx, struct sgsn_pdp_ctx); - if (!pdp) - return NULL; - - pdp->mm = mm; - pdp->nsapi = nsapi; - pdp->ctrg = rate_ctr_group_alloc(pdp, &pdpctx_ctrg_desc, nsapi); - if (!pdp->ctrg) { - LOGPDPCTXP(LOGL_ERROR, pdp, "Error allocation counter group\n"); - talloc_free(pdp); - return NULL; - } - llist_add(&pdp->list, &mm->pdp_list); - llist_add(&pdp->g_list, &sgsn_pdp_ctxts); - - return pdp; -} - -/* - * This function will not trigger any GSM DEACT PDP ACK messages, so you - * probably want to call sgsn_delete_pdp_ctx() instead if the connection - * isn't detached already. - */ -void sgsn_pdp_ctx_terminate(struct sgsn_pdp_ctx *pdp) -{ - struct sgsn_signal_data sig_data; - - OSMO_ASSERT(pdp->mm != NULL); - - /* There might still be pending callbacks in libgtp. So the parts of - * this object relevant to GTP need to remain intact in this case. */ - - LOGPDPCTXP(LOGL_INFO, pdp, "Forcing release of PDP context\n"); - - if (pdp->mm->ran_type == MM_CTX_T_GERAN_Gb) { - /* Force the deactivation of the SNDCP layer */ - sndcp_sm_deactivate_ind(&pdp->mm->gb.llme->lle[pdp->sapi], pdp->nsapi); - } - - memset(&sig_data, 0, sizeof(sig_data)); - sig_data.pdp = pdp; - osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_TERMINATE, &sig_data); - - /* Detach from MM context */ - llist_del(&pdp->list); - pdp->mm = NULL; - - sgsn_delete_pdp_ctx(pdp); -} - -/* - * Don't call this function directly unless you know what you are doing. - * In normal conditions use sgsn_delete_pdp_ctx and in unspecified or - * implementation dependent abnormal ones sgsn_pdp_ctx_terminate. - */ -void sgsn_pdp_ctx_free(struct sgsn_pdp_ctx *pdp) -{ - struct sgsn_signal_data sig_data; - - memset(&sig_data, 0, sizeof(sig_data)); - sig_data.pdp = pdp; - osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_FREE, &sig_data); - - rate_ctr_group_free(pdp->ctrg); - if (pdp->mm) - llist_del(&pdp->list); - llist_del(&pdp->g_list); - - /* _if_ we still have a library handle, at least set it to NULL - * to avoid any dereferences of the now-deleted PDP context from - * sgsn_libgtp:cb_data_ind() */ - if (pdp->lib) { - struct pdp_t *lib = pdp->lib; - LOGPDPCTXP(LOGL_NOTICE, pdp, "freeing PDP context that still " - "has a libgtp handle attached to it, this shouldn't " - "happen!\n"); - osmo_generate_backtrace(); - lib->priv = NULL; - } - - if (pdp->destroy_ggsn) - sgsn_ggsn_ctx_free(pdp->ggsn); - talloc_free(pdp); -} - -/* GGSN contexts */ - -struct sgsn_ggsn_ctx *sgsn_ggsn_ctx_alloc(uint32_t id) -{ - struct sgsn_ggsn_ctx *ggc; - - ggc = talloc_zero(tall_bsc_ctx, struct sgsn_ggsn_ctx); - if (!ggc) - return NULL; - - ggc->id = id; - ggc->gtp_version = 1; - ggc->remote_restart_ctr = -1; - /* if we are called from config file parse, this gsn doesn't exist yet */ - ggc->gsn = sgsn->gsn; - llist_add(&ggc->list, &sgsn_ggsn_ctxts); - - return ggc; -} - -void sgsn_ggsn_ctx_free(struct sgsn_ggsn_ctx *ggc) -{ - llist_del(&ggc->list); - talloc_free(ggc); -} - -struct sgsn_ggsn_ctx *sgsn_ggsn_ctx_by_id(uint32_t id) -{ - struct sgsn_ggsn_ctx *ggc; - - llist_for_each_entry(ggc, &sgsn_ggsn_ctxts, list) { - if (id == ggc->id) - return ggc; - } - return NULL; -} - -struct sgsn_ggsn_ctx *sgsn_ggsn_ctx_by_addr(struct in_addr *addr) -{ - struct sgsn_ggsn_ctx *ggc; - - llist_for_each_entry(ggc, &sgsn_ggsn_ctxts, list) { - if (!memcmp(addr, &ggc->remote_addr, sizeof(*addr))) - return ggc; - } - return NULL; -} - - -struct sgsn_ggsn_ctx *sgsn_ggsn_ctx_find_alloc(uint32_t id) -{ - struct sgsn_ggsn_ctx *ggc; - - ggc = sgsn_ggsn_ctx_by_id(id); - if (!ggc) - ggc = sgsn_ggsn_ctx_alloc(id); - return ggc; -} - -/* APN contexts */ - -static struct apn_ctx *sgsn_apn_ctx_alloc(const char *ap_name, const char *imsi_prefix) -{ - struct apn_ctx *actx; - - actx = talloc_zero(tall_bsc_ctx, struct apn_ctx); - if (!actx) - return NULL; - actx->name = talloc_strdup(actx, ap_name); - actx->imsi_prefix = talloc_strdup(actx, imsi_prefix); - - llist_add_tail(&actx->list, &sgsn_apn_ctxts); - - return actx; -} - -void sgsn_apn_ctx_free(struct apn_ctx *actx) -{ - llist_del(&actx->list); - talloc_free(actx); -} - -struct apn_ctx *sgsn_apn_ctx_match(const char *name, const char *imsi) -{ - struct apn_ctx *actx; - struct apn_ctx *found_actx = NULL; - size_t imsi_prio = 0; - size_t name_prio = 0; - size_t name_req_len = strlen(name); - - llist_for_each_entry(actx, &sgsn_apn_ctxts, list) { - size_t name_ref_len, imsi_ref_len; - const char *name_ref_start, *name_match_start; - - imsi_ref_len = strlen(actx->imsi_prefix); - if (strncmp(actx->imsi_prefix, imsi, imsi_ref_len) != 0) - continue; - - if (imsi_ref_len < imsi_prio) - continue; - - /* IMSI matches */ - - name_ref_start = &actx->name[0]; - if (name_ref_start[0] == '*') { - /* Suffix match */ - name_ref_start += 1; - name_ref_len = strlen(name_ref_start); - if (name_ref_len > name_req_len) - continue; - } else { - name_ref_len = strlen(name_ref_start); - if (name_ref_len != name_req_len) - continue; - } - - name_match_start = name + (name_req_len - name_ref_len); - if (strcasecmp(name_match_start, name_ref_start) != 0) - continue; - - /* IMSI and name match */ - - if (imsi_ref_len == imsi_prio && name_ref_len < name_prio) - /* Lower priority, skip */ - continue; - - imsi_prio = imsi_ref_len; - name_prio = name_ref_len; - found_actx = actx; - } - return found_actx; -} - -struct apn_ctx *sgsn_apn_ctx_by_name(const char *name, const char *imsi_prefix) -{ - struct apn_ctx *actx; - - llist_for_each_entry(actx, &sgsn_apn_ctxts, list) { - if (strcasecmp(name, actx->name) == 0 && - strcasecmp(imsi_prefix, actx->imsi_prefix) == 0) - return actx; - } - return NULL; -} - -struct apn_ctx *sgsn_apn_ctx_find_alloc(const char *name, const char *imsi_prefix) -{ - struct apn_ctx *actx; - - actx = sgsn_apn_ctx_by_name(name, imsi_prefix); - if (!actx) - actx = sgsn_apn_ctx_alloc(name, imsi_prefix); - - return actx; -} - -uint32_t sgsn_alloc_ptmsi(void) -{ - struct sgsn_mm_ctx *mm; - uint32_t ptmsi = 0xdeadbeef; - int max_retries = 100; - -restart: - if (RAND_bytes((uint8_t *) &ptmsi, sizeof(ptmsi)) != 1) - goto failed; - - /* Enforce that the 2 MSB are set without loosing the distance between - * identical values. Since rand() has no duplicate values within a - * period (because the size of the state is the same like the size of - * the random value), this leads to a distance of period/4 when the - * distribution of the 2 MSB is uniform. This approach fails with a - * probability of (3/4)^max_retries, only 1% of the approaches will - * need more than 16 numbers (even distribution assumed). - * - * Alternatively, a freeze list could be used if another PRNG is used - * or when this approach proves to be not sufficient. - */ - if (ptmsi >= 0xC0000000) { - if (!max_retries--) - goto failed; - goto restart; - } - ptmsi |= 0xC0000000; - - if (ptmsi == GSM_RESERVED_TMSI) { - if (!max_retries--) - goto failed; - goto restart; - } - - llist_for_each_entry(mm, &sgsn_mm_ctxts, list) { - if (mm->p_tmsi == ptmsi) { - if (!max_retries--) - goto failed; - goto restart; - } - } - - return ptmsi; - -failed: - LOGP(DGPRS, LOGL_ERROR, "Failed to allocate a P-TMSI\n"); - return GSM_RESERVED_TMSI; -} - -static void drop_one_pdp(struct sgsn_pdp_ctx *pdp) -{ - if (pdp->mm->gmm_state == GMM_REGISTERED_NORMAL) - gsm48_tx_gsm_deact_pdp_req(pdp, GSM_CAUSE_NET_FAIL); - else { - /* FIXME: GPRS paging in case MS is SUSPENDED */ - LOGPDPCTXP(LOGL_NOTICE, pdp, "Hard-dropping PDP ctx due to GGSN " - "recovery\n"); - /* FIXME: how to tell this to libgtp? */ - sgsn_pdp_ctx_free(pdp); - } -} - -/* High-level function to be called in case a GGSN has disappeared or - * otherwise lost state (recovery procedure) */ -int drop_all_pdp_for_ggsn(struct sgsn_ggsn_ctx *ggsn) -{ - struct sgsn_mm_ctx *mm; - int num = 0; - - llist_for_each_entry(mm, &sgsn_mm_ctxts, list) { - struct sgsn_pdp_ctx *pdp; - llist_for_each_entry(pdp, &mm->pdp_list, list) { - if (pdp->ggsn == ggsn) { - drop_one_pdp(pdp); - num++; - } - } - } - - return num; -} - -void sgsn_update_subscriber_data(struct sgsn_mm_ctx *mmctx) -{ - OSMO_ASSERT(mmctx != NULL); - LOGMMCTXP(LOGL_INFO, mmctx, "Subscriber data update\n"); - - sgsn_auth_update(mmctx); -} - -static void insert_extra(struct tlv_parsed *tp, - struct sgsn_subscriber_data *data, - struct sgsn_subscriber_pdp_data *pdp) -{ - tp->lv[OSMO_IE_GSM_SUB_QOS].len = pdp->qos_subscribed_len; - tp->lv[OSMO_IE_GSM_SUB_QOS].val = pdp->qos_subscribed; - - /* Prefer PDP charging characteristics of per subscriber one */ - if (pdp->has_pdp_charg) { - tp->lv[OSMO_IE_GSM_CHARG_CHAR].len = sizeof(pdp->pdp_charg); - tp->lv[OSMO_IE_GSM_CHARG_CHAR].val = &pdp->pdp_charg[0]; - } else if (data->has_pdp_charg) { - tp->lv[OSMO_IE_GSM_CHARG_CHAR].len = sizeof(data->pdp_charg); - tp->lv[OSMO_IE_GSM_CHARG_CHAR].val = &data->pdp_charg[0]; - } -} - -/** - * The tlv_parsed tp parameter will be modified to insert a - * OSMO_IE_GSM_SUB_QOS in case the data is available in the - * PDP context handling. - */ -struct sgsn_ggsn_ctx *sgsn_mm_ctx_find_ggsn_ctx(struct sgsn_mm_ctx *mmctx, - struct tlv_parsed *tp, - enum gsm48_gsm_cause *gsm_cause, - char *out_apn_str) -{ - char req_apn_str[GSM_APN_LENGTH] = {0}; - const struct apn_ctx *apn_ctx = NULL; - const char *selected_apn_str = NULL; - struct sgsn_subscriber_pdp_data *pdp; - struct sgsn_ggsn_ctx *ggsn = NULL; - int allow_any_apn = 0; - - out_apn_str[0] = '\0'; - - if (TLVP_PRESENT(tp, GSM48_IE_GSM_APN)) { - if (TLVP_LEN(tp, GSM48_IE_GSM_APN) >= GSM_APN_LENGTH - 1) { - LOGMMCTXP(LOGL_ERROR, mmctx, "APN IE too long\n"); - *gsm_cause = GSM_CAUSE_INV_MAND_INFO; - return NULL; - } - - osmo_apn_to_str(req_apn_str, - TLVP_VAL(tp, GSM48_IE_GSM_APN), - TLVP_LEN(tp, GSM48_IE_GSM_APN)); - - if (strcmp(req_apn_str, "*") == 0) - req_apn_str[0] = 0; - } - - if (mmctx->subscr == NULL) - allow_any_apn = 1; - - if (strlen(req_apn_str) == 0 && !allow_any_apn) { - /* No specific APN requested, check for an APN that is both - * granted and configured */ - - llist_for_each_entry(pdp, &mmctx->subscr->sgsn_data->pdp_list, list) { - if (strcmp(pdp->apn_str, "*") == 0) - { - allow_any_apn = 1; - selected_apn_str = ""; - insert_extra(tp, mmctx->subscr->sgsn_data, pdp); - continue; - } - if (!llist_empty(&sgsn_apn_ctxts)) { - apn_ctx = sgsn_apn_ctx_match(req_apn_str, mmctx->imsi); - /* Not configured */ - if (apn_ctx == NULL) - continue; - } - insert_extra(tp, mmctx->subscr->sgsn_data, pdp); - selected_apn_str = pdp->apn_str; - break; - } - } else if (!allow_any_apn) { - /* Check whether the given APN is granted */ - llist_for_each_entry(pdp, &mmctx->subscr->sgsn_data->pdp_list, list) { - if (strcmp(pdp->apn_str, "*") == 0) { - insert_extra(tp, mmctx->subscr->sgsn_data, pdp); - selected_apn_str = req_apn_str; - allow_any_apn = 1; - continue; - } - if (strcasecmp(pdp->apn_str, req_apn_str) == 0) { - insert_extra(tp, mmctx->subscr->sgsn_data, pdp); - selected_apn_str = req_apn_str; - break; - } - } - } else if (strlen(req_apn_str) != 0) { - /* Any APN is allowed */ - selected_apn_str = req_apn_str; - } else { - /* Prefer the GGSN associated with the wildcard APN */ - selected_apn_str = ""; - } - - if (!allow_any_apn && selected_apn_str == NULL) { - /* Access not granted */ - LOGMMCTXP(LOGL_NOTICE, mmctx, - "The requested APN '%s' is not allowed\n", - req_apn_str); - *gsm_cause = GSM_CAUSE_REQ_SERV_OPT_NOTSUB; - return NULL; - } - - /* copy the selected apn_str */ - if (selected_apn_str) - strcpy(out_apn_str, selected_apn_str); - else - out_apn_str[0] = '\0'; - - if (apn_ctx == NULL && selected_apn_str) - apn_ctx = sgsn_apn_ctx_match(selected_apn_str, mmctx->imsi); - - if (apn_ctx != NULL) { - ggsn = apn_ctx->ggsn; - } else if (llist_empty(&sgsn_apn_ctxts)) { - /* No configuration -> use GGSN 0 */ - ggsn = sgsn_ggsn_ctx_by_id(0); - } else if (allow_any_apn && - (selected_apn_str == NULL || strlen(selected_apn_str) == 0)) { - /* No APN given and no default configuration -> Use GGSN 0 */ - ggsn = sgsn_ggsn_ctx_by_id(0); - } else { - /* No matching configuration found */ - LOGMMCTXP(LOGL_NOTICE, mmctx, - "The selected APN '%s' has not been configured\n", - selected_apn_str); - *gsm_cause = GSM_CAUSE_MISSING_APN; - return NULL; - } - - if (!ggsn) { - LOGMMCTXP(LOGL_NOTICE, mmctx, - "No static GGSN configured. Selected APN '%s'\n", - selected_apn_str); - return NULL; - } - - LOGMMCTXP(LOGL_INFO, mmctx, - "Found GGSN %d for APN '%s' (requested '%s')\n", - ggsn->id, selected_apn_str ? selected_apn_str : "---", - req_apn_str); - - return ggsn; -} - -static void sgsn_llme_cleanup_free(struct gprs_llc_llme *llme) -{ - struct sgsn_mm_ctx *mmctx = NULL; - - llist_for_each_entry(mmctx, &sgsn_mm_ctxts, list) { - if (llme == mmctx->gb.llme) { - gsm0408_gprs_access_cancelled(mmctx, SGSN_ERROR_CAUSE_NONE); - return; - } - } - - /* No MM context found */ - LOGP(DGPRS, LOGL_INFO, "Deleting orphaned LLME, TLLI 0x%08x\n", - llme->tlli); - gprs_llgmm_unassign(llme); -} - -static void sgsn_llme_check_cb(void *data_) -{ - struct gprs_llc_llme *llme, *llme_tmp; - struct timespec now_tp; - time_t now, age; - time_t max_age = gprs_max_time_to_idle(); - - int rc; - - rc = clock_gettime(CLOCK_MONOTONIC, &now_tp); - OSMO_ASSERT(rc >= 0); - now = now_tp.tv_sec; - - LOGP(DGPRS, LOGL_DEBUG, - "Checking for inactive LLMEs, time = %u\n", (unsigned)now); - - llist_for_each_entry_safe(llme, llme_tmp, &gprs_llc_llmes, list) { - if (llme->age_timestamp == GPRS_LLME_RESET_AGE) - llme->age_timestamp = now; - - age = now - llme->age_timestamp; - - if (age > max_age || age < 0) { - LOGP(DGPRS, LOGL_INFO, - "Inactivity timeout for TLLI 0x%08x, age %d\n", - llme->tlli, (int)age); - sgsn_llme_cleanup_free(llme); - } - } - - osmo_timer_schedule(&sgsn->llme_timer, GPRS_LLME_CHECK_TICK, 0); -} - -void sgsn_inst_init() -{ - osmo_timer_setup(&sgsn->llme_timer, sgsn_llme_check_cb, NULL); - osmo_timer_schedule(&sgsn->llme_timer, GPRS_LLME_CHECK_TICK, 0); -} - diff --git a/openbsc/src/gprs/gprs_sndcp.c b/openbsc/src/gprs/gprs_sndcp.c deleted file mode 100644 index a18998f9e..000000000 --- a/openbsc/src/gprs/gprs_sndcp.c +++ /dev/null @@ -1,1258 +0,0 @@ -/* GPRS SNDCP protocol implementation as per 3GPP TS 04.65 */ - -/* (C) 2010 by Harald Welte <laforge@gnumonks.org> - * (C) 2010 by On-Waves - * - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <errno.h> -#include <stdint.h> -#include <stdbool.h> - -#include <osmocom/core/msgb.h> -#include <osmocom/core/linuxlist.h> -#include <osmocom/core/timer.h> -#include <osmocom/core/talloc.h> -#include <osmocom/gprs/gprs_bssgp.h> - -#include <openbsc/gsm_data.h> -#include <openbsc/debug.h> -#include <openbsc/gprs_llc.h> -#include <openbsc/sgsn.h> -#include <openbsc/gprs_sndcp.h> -#include <openbsc/gprs_llc_xid.h> -#include <openbsc/gprs_sndcp_xid.h> -#include <openbsc/gprs_sndcp_pcomp.h> -#include <openbsc/gprs_sndcp_dcomp.h> -#include <openbsc/gprs_sndcp_comp.h> - -#define DEBUG_IP_PACKETS 0 /* 0=Disabled, 1=Enabled */ - -#if DEBUG_IP_PACKETS == 1 -/* Calculate TCP/IP checksum */ -static uint16_t calc_ip_csum(uint8_t *data, int len) -{ - int i; - uint32_t accumulator = 0; - uint16_t *pointer = (uint16_t *) data; - - for (i = len; i > 1; i -= 2) { - accumulator += *pointer; - pointer++; - } - - if (len % 2) - accumulator += *pointer; - - accumulator = (accumulator & 0xffff) + ((accumulator >> 16) & 0xffff); - accumulator += (accumulator >> 16) & 0xffff; - return (~accumulator); -} - -/* Calculate TCP/IP checksum */ -static uint16_t calc_tcpip_csum(const void *ctx, uint8_t *packet, int len) -{ - uint8_t *buf; - uint16_t csum; - - buf = talloc_zero_size(ctx, len); - memset(buf, 0, len); - memcpy(buf, packet + 12, 8); - buf[9] = packet[9]; - buf[11] = (len - 20) & 0xFF; - buf[10] = (len - 20) >> 8 & 0xFF; - memcpy(buf + 12, packet + 20, len - 20); - csum = calc_ip_csum(buf, len - 20 + 12); - talloc_free(buf); - return csum; -} - -/* Show some ip packet details */ -static void debug_ip_packet(uint8_t *data, int len, int dir, char *info) -{ - uint8_t tcp_flags; - char flags_debugmsg[256]; - int len_short; - static unsigned int packet_count = 0; - static unsigned int tcp_csum_err_count = 0; - static unsigned int ip_csum_err_count = 0; - - packet_count++; - - if (len > 80) - len_short = 80; - else - len_short = len; - - if (dir) - DEBUGP(DSNDCP, "%s: MS => SGSN: %s\n", info, - osmo_hexdump_nospc(data, len_short)); - else - DEBUGP(DSNDCP, "%s: MS <= SGSN: %s\n", info, - osmo_hexdump_nospc(data, len_short)); - - DEBUGP(DSNDCP, "%s: Length.: %d\n", info, len); - DEBUGP(DSNDCP, "%s: NO.: %d\n", info, packet_count); - - if (len < 20) { - DEBUGP(DSNDCP, "%s: Error: Short IP packet!\n", info); - return; - } - - if (calc_ip_csum(data, 20) != 0) { - DEBUGP(DSNDCP, "%s: Bad IP-Header checksum!\n", info); - ip_csum_err_count++; - } else - DEBUGP(DSNDCP, "%s: IP-Header checksum ok.\n", info); - - if (data[9] == 0x06) { - if (len < 40) { - DEBUGP(DSNDCP, "%s: Error: Short TCP packet!\n", info); - return; - } - - DEBUGP(DSNDCP, "%s: Protocol type: TCP\n", info); - tcp_flags = data[33]; - - if (calc_tcpip_csum(NULL, data, len) != 0) { - DEBUGP(DSNDCP, "%s: Bad TCP checksum!\n", info); - tcp_csum_err_count++; - } else - DEBUGP(DSNDCP, "%s: TCP checksum ok.\n", info); - - memset(flags_debugmsg, 0, sizeof(flags_debugmsg)); - if (tcp_flags & 1) - strcat(flags_debugmsg, "FIN "); - if (tcp_flags & 2) - strcat(flags_debugmsg, "SYN "); - if (tcp_flags & 4) - strcat(flags_debugmsg, "RST "); - if (tcp_flags & 8) - strcat(flags_debugmsg, "PSH "); - if (tcp_flags & 16) - strcat(flags_debugmsg, "ACK "); - if (tcp_flags & 32) - strcat(flags_debugmsg, "URG "); - DEBUGP(DSNDCP, "%s: FLAGS: %s\n", info, flags_debugmsg); - } else if (data[9] == 0x11) { - DEBUGP(DSNDCP, "%s: Protocol type: UDP\n", info); - } else { - DEBUGP(DSNDCP, "%s: Protocol type: (%02x)\n", info, data[9]); - } - - DEBUGP(DSNDCP, "%s: IP-Header checksum errors: %d\n", info, - ip_csum_err_count); - DEBUGP(DSNDCP, "%s: TCP-Checksum errors: %d\n", info, - tcp_csum_err_count); -} -#endif - -/* Chapter 7.2: SN-PDU Formats */ -struct sndcp_common_hdr { - /* octet 1 */ - uint8_t nsapi:4; - uint8_t more:1; - uint8_t type:1; - uint8_t first:1; - uint8_t spare:1; -} __attribute__((packed)); - -/* PCOMP / DCOMP only exist in first fragment */ -struct sndcp_comp_hdr { - /* octet 2 */ - uint8_t pcomp:4; - uint8_t dcomp:4; -} __attribute__((packed)); - -struct sndcp_udata_hdr { - /* octet 3 */ - uint8_t npdu_high:4; - uint8_t seg_nr:4; - /* octet 4 */ - uint8_t npdu_low; -} __attribute__((packed)); - - -static void *tall_sndcp_ctx; - -/* A fragment queue entry, containing one framgent of a N-PDU */ -struct defrag_queue_entry { - struct llist_head list; - /* segment number of this fragment */ - uint32_t seg_nr; - /* length of the data area of this fragment */ - uint32_t data_len; - /* pointer to the data of this fragment */ - uint8_t *data; -}; - -LLIST_HEAD(gprs_sndcp_entities); - -/* Check if any compression parameters are set in the sgsn configuration */ -static inline int any_pcomp_or_dcomp_active(struct sgsn_instance *sgsn) { - if (sgsn->cfg.pcomp_rfc1144.active || sgsn->cfg.pcomp_rfc1144.passive || - sgsn->cfg.dcomp_v42bis.active || sgsn->cfg.dcomp_v42bis.passive) - return true; - else - return false; -} - -/* Enqueue a fragment into the defragment queue */ -static int defrag_enqueue(struct gprs_sndcp_entity *sne, uint8_t seg_nr, - uint8_t *data, uint32_t data_len) -{ - struct defrag_queue_entry *dqe; - - dqe = talloc_zero(tall_sndcp_ctx, struct defrag_queue_entry); - if (!dqe) - return -ENOMEM; - dqe->data = talloc_zero_size(dqe, data_len); - if (!dqe->data) { - talloc_free(dqe); - return -ENOMEM; - } - dqe->seg_nr = seg_nr; - dqe->data_len = data_len; - - llist_add(&dqe->list, &sne->defrag.frag_list); - - if (seg_nr > sne->defrag.highest_seg) - sne->defrag.highest_seg = seg_nr; - - sne->defrag.seg_have |= (1 << seg_nr); - sne->defrag.tot_len += data_len; - - memcpy(dqe->data, data, data_len); - - return 0; -} - -/* return if we have all segments of this N-PDU */ -static int defrag_have_all_segments(struct gprs_sndcp_entity *sne) -{ - uint32_t seg_needed = 0; - unsigned int i; - - /* create a bitmask of needed segments */ - for (i = 0; i <= sne->defrag.highest_seg; i++) - seg_needed |= (1 << i); - - if (seg_needed == sne->defrag.seg_have) - return 1; - - return 0; -} - -static struct defrag_queue_entry *defrag_get_seg(struct gprs_sndcp_entity *sne, - uint32_t seg_nr) -{ - struct defrag_queue_entry *dqe; - - llist_for_each_entry(dqe, &sne->defrag.frag_list, list) { - if (dqe->seg_nr == seg_nr) { - llist_del(&dqe->list); - return dqe; - } - } - return NULL; -} - -/* Perform actual defragmentation and create an output packet */ -static int defrag_segments(struct gprs_sndcp_entity *sne) -{ - struct msgb *msg; - unsigned int seg_nr; - uint8_t *npdu; - int npdu_len; - int rc; - uint8_t *expnd = NULL; - - LOGP(DSNDCP, LOGL_DEBUG, "TLLI=0x%08x NSAPI=%u: Defragment output PDU %u " - "num_seg=%u tot_len=%u\n", sne->lle->llme->tlli, sne->nsapi, - sne->defrag.npdu, sne->defrag.highest_seg, sne->defrag.tot_len); - msg = msgb_alloc_headroom(sne->defrag.tot_len+256, 128, "SNDCP Defrag"); - if (!msg) - return -ENOMEM; - - /* FIXME: message headers + identifiers */ - - npdu = msg->data; - - for (seg_nr = 0; seg_nr <= sne->defrag.highest_seg; seg_nr++) { - struct defrag_queue_entry *dqe; - uint8_t *data; - - dqe = defrag_get_seg(sne, seg_nr); - if (!dqe) { - LOGP(DSNDCP, LOGL_ERROR, "Segment %u missing\n", seg_nr); - msgb_free(msg); - return -EIO; - } - /* actually append the segment to the N-PDU */ - data = msgb_put(msg, dqe->data_len); - memcpy(data, dqe->data, dqe->data_len); - - /* release memory for the fragment queue entry */ - talloc_free(dqe); - } - - npdu_len = sne->defrag.tot_len; - - /* FIXME: cancel timer */ - - /* actually send the N-PDU to the SGSN core code, which then - * hands it off to the correct GTP tunnel + GGSN via gtp_data_req() */ - - /* Decompress packet */ -#if DEBUG_IP_PACKETS == 1 - DEBUGP(DSNDCP, " \n"); - DEBUGP(DSNDCP, ":::::::::::::::::::::::::::::::::::::::::::::::::::\n"); - DEBUGP(DSNDCP, "===================================================\n"); -#endif - if (any_pcomp_or_dcomp_active(sgsn)) { - - expnd = talloc_zero_size(msg, npdu_len * MAX_DATADECOMPR_FAC + - MAX_HDRDECOMPR_INCR); - memcpy(expnd, npdu, npdu_len); - - /* Apply data decompression */ - rc = gprs_sndcp_dcomp_expand(expnd, npdu_len, sne->defrag.dcomp, - sne->defrag.data); - if (rc < 0) { - LOGP(DSNDCP, LOGL_ERROR, - "Data decompression failed!\n"); - talloc_free(expnd); - return -EIO; - } - - /* Apply header decompression */ - rc = gprs_sndcp_pcomp_expand(expnd, rc, sne->defrag.pcomp, - sne->defrag.proto); - if (rc < 0) { - LOGP(DSNDCP, LOGL_ERROR, - "TCP/IP Header decompression failed!\n"); - talloc_free(expnd); - return -EIO; - } - - /* Modify npu length, expnd is handed directly handed - * over to gsn_rx_sndcp_ud_ind(), see below */ - npdu_len = rc; - } else - expnd = npdu; -#if DEBUG_IP_PACKETS == 1 - debug_ip_packet(expnd, npdu_len, 1, "defrag_segments()"); - DEBUGP(DSNDCP, "===================================================\n"); - DEBUGP(DSNDCP, ":::::::::::::::::::::::::::::::::::::::::::::::::::\n"); - DEBUGP(DSNDCP, " \n"); -#endif - - /* Hand off packet to gtp */ - rc = sgsn_rx_sndcp_ud_ind(&sne->ra_id, sne->lle->llme->tlli, - sne->nsapi, msg, npdu_len, expnd); - - if (any_pcomp_or_dcomp_active(sgsn)) - talloc_free(expnd); - - return rc; -} - -static int defrag_input(struct gprs_sndcp_entity *sne, struct msgb *msg, - uint8_t *hdr, unsigned int len) -{ - struct sndcp_common_hdr *sch; - struct sndcp_udata_hdr *suh; - uint16_t npdu_num; - uint8_t *data; - int rc; - - sch = (struct sndcp_common_hdr *) hdr; - if (sch->first) { - suh = (struct sndcp_udata_hdr *) (hdr + 1 + sizeof(struct sndcp_common_hdr)); - } else - suh = (struct sndcp_udata_hdr *) (hdr + sizeof(struct sndcp_common_hdr)); - - data = (uint8_t *)suh + sizeof(struct sndcp_udata_hdr); - - npdu_num = (suh->npdu_high << 8) | suh->npdu_low; - - LOGP(DSNDCP, LOGL_DEBUG, "TLLI=0x%08x NSAPI=%u: Input PDU %u Segment %u " - "Length %u %s %s\n", sne->lle->llme->tlli, sne->nsapi, npdu_num, - suh->seg_nr, len, sch->first ? "F " : "", sch->more ? "M" : ""); - - if (sch->first) { - /* first segment of a new packet. Discard all leftover fragments of - * previous packet */ - if (!llist_empty(&sne->defrag.frag_list)) { - struct defrag_queue_entry *dqe, *dqe2; - LOGP(DSNDCP, LOGL_INFO, "TLLI=0x%08x NSAPI=%u: Dropping " - "SN-PDU %u due to insufficient segments (%04x)\n", - sne->lle->llme->tlli, sne->nsapi, sne->defrag.npdu, - sne->defrag.seg_have); - llist_for_each_entry_safe(dqe, dqe2, &sne->defrag.frag_list, list) { - llist_del(&dqe->list); - talloc_free(dqe); - } - } - /* store the currently de-fragmented PDU number */ - sne->defrag.npdu = npdu_num; - - /* Re-set fragmentation state */ - sne->defrag.no_more = sne->defrag.highest_seg = sne->defrag.seg_have = 0; - sne->defrag.tot_len = 0; - /* FIXME: (re)start timer */ - } - - if (sne->defrag.npdu != npdu_num) { - LOGP(DSNDCP, LOGL_INFO, "Segment for different SN-PDU " - "(%u != %u)\n", npdu_num, sne->defrag.npdu); - /* FIXME */ - } - - /* FIXME: check if seg_nr already exists */ - /* make sure to subtract length of SNDCP header from 'len' */ - rc = defrag_enqueue(sne, suh->seg_nr, data, len - (data - hdr)); - if (rc < 0) - return rc; - - if (!sch->more) { - /* this is suppsed to be the last segment of the N-PDU, but it - * might well be not the last to arrive */ - sne->defrag.no_more = 1; - } - - if (sne->defrag.no_more) { - /* we have already received the last segment before, let's check - * if all the previous segments exist */ - if (defrag_have_all_segments(sne)) - return defrag_segments(sne); - } - - return 0; -} - -static struct gprs_sndcp_entity *gprs_sndcp_entity_by_lle(const struct gprs_llc_lle *lle, - uint8_t nsapi) -{ - struct gprs_sndcp_entity *sne; - - llist_for_each_entry(sne, &gprs_sndcp_entities, list) { - if (sne->lle == lle && sne->nsapi == nsapi) - return sne; - } - return NULL; -} - -static struct gprs_sndcp_entity *gprs_sndcp_entity_alloc(struct gprs_llc_lle *lle, - uint8_t nsapi) -{ - struct gprs_sndcp_entity *sne; - - sne = talloc_zero(tall_sndcp_ctx, struct gprs_sndcp_entity); - if (!sne) - return NULL; - - sne->lle = lle; - sne->nsapi = nsapi; - sne->defrag.timer.data = sne; - //sne->fqueue.timer.cb = FIXME; - sne->rx_state = SNDCP_RX_S_FIRST; - INIT_LLIST_HEAD(&sne->defrag.frag_list); - - llist_add(&sne->list, &gprs_sndcp_entities); - - return sne; -} - -/* Entry point for the SNSM-ACTIVATE.indication */ -int sndcp_sm_activate_ind(struct gprs_llc_lle *lle, uint8_t nsapi) -{ - LOGP(DSNDCP, LOGL_INFO, "SNSM-ACTIVATE.ind (lle=%p TLLI=%08x, " - "SAPI=%u, NSAPI=%u)\n", lle, lle->llme->tlli, lle->sapi, nsapi); - - if (gprs_sndcp_entity_by_lle(lle, nsapi)) { - LOGP(DSNDCP, LOGL_ERROR, "Trying to ACTIVATE " - "already-existing entity (TLLI=%08x, NSAPI=%u)\n", - lle->llme->tlli, nsapi); - return -EEXIST; - } - - if (!gprs_sndcp_entity_alloc(lle, nsapi)) { - LOGP(DSNDCP, LOGL_ERROR, "Out of memory during ACTIVATE\n"); - return -ENOMEM; - } - - return 0; -} - -/* Entry point for the SNSM-DEACTIVATE.indication */ -int sndcp_sm_deactivate_ind(struct gprs_llc_lle *lle, uint8_t nsapi) -{ - struct gprs_sndcp_entity *sne; - - LOGP(DSNDCP, LOGL_INFO, "SNSM-DEACTIVATE.ind (lle=%p, TLLI=%08x, " - "SAPI=%u, NSAPI=%u)\n", lle, lle->llme->tlli, lle->sapi, nsapi); - - sne = gprs_sndcp_entity_by_lle(lle, nsapi); - if (!sne) { - LOGP(DSNDCP, LOGL_ERROR, "SNSM-DEACTIVATE.ind for non-" - "existing TLLI=%08x SAPI=%u NSAPI=%u\n", lle->llme->tlli, - lle->sapi, nsapi); - return -ENOENT; - } - llist_del(&sne->list); - /* frag queue entries are hierarchically allocated, so no need to - * free them explicitly here */ - talloc_free(sne); - - return 0; -} - -/* Fragmenter state */ -struct sndcp_frag_state { - uint8_t frag_nr; - struct msgb *msg; /* original message */ - uint8_t *next_byte; /* first byte of next fragment */ - - struct gprs_sndcp_entity *sne; - void *mmcontext; -}; - -/* returns '1' if there are more fragments to send, '0' if none */ -static int sndcp_send_ud_frag(struct sndcp_frag_state *fs, - uint8_t pcomp, uint8_t dcomp) -{ - struct gprs_sndcp_entity *sne = fs->sne; - struct gprs_llc_lle *lle = sne->lle; - struct sndcp_common_hdr *sch; - struct sndcp_comp_hdr *scomph; - struct sndcp_udata_hdr *suh; - struct msgb *fmsg; - unsigned int max_payload_len; - unsigned int len; - uint8_t *data; - int rc, more; - - fmsg = msgb_alloc_headroom(fs->sne->lle->params.n201_u+256, 128, - "SNDCP Frag"); - if (!fmsg) { - msgb_free(fs->msg); - return -ENOMEM; - } - - /* make sure lower layers route the fragment like the original */ - msgb_tlli(fmsg) = msgb_tlli(fs->msg); - msgb_bvci(fmsg) = msgb_bvci(fs->msg); - msgb_nsei(fmsg) = msgb_nsei(fs->msg); - - /* prepend common SNDCP header */ - sch = (struct sndcp_common_hdr *) msgb_put(fmsg, sizeof(*sch)); - sch->nsapi = sne->nsapi; - /* Set FIRST bit if we are the first fragment in a series */ - if (fs->frag_nr == 0) - sch->first = 1; - sch->type = 1; - - /* append the compression header for first fragment */ - if (sch->first) { - scomph = (struct sndcp_comp_hdr *) - msgb_put(fmsg, sizeof(*scomph)); - scomph->pcomp = pcomp; - scomph->dcomp = dcomp; - } - - /* append the user-data header */ - suh = (struct sndcp_udata_hdr *) msgb_put(fmsg, sizeof(*suh)); - suh->npdu_low = sne->tx_npdu_nr & 0xff; - suh->npdu_high = (sne->tx_npdu_nr >> 8) & 0xf; - suh->seg_nr = fs->frag_nr % 0xf; - - /* calculate remaining length to be sent */ - len = (fs->msg->data + fs->msg->len) - fs->next_byte; - /* how much payload can we actually send via LLC? */ - max_payload_len = lle->params.n201_u - (sizeof(*sch) + sizeof(*suh)); - if (sch->first) - max_payload_len -= sizeof(*scomph); - /* check if we're exceeding the max */ - if (len > max_payload_len) - len = max_payload_len; - - /* copy the actual fragment data into our fmsg */ - data = msgb_put(fmsg, len); - memcpy(data, fs->next_byte, len); - - /* Increment fragment number and data pointer to next fragment */ - fs->frag_nr++; - fs->next_byte += len; - - /* determine if we have more fragemnts to send */ - if ((fs->msg->data + fs->msg->len) <= fs->next_byte) - more = 0; - else - more = 1; - - /* set the MORE bit of the SNDCP header accordingly */ - sch->more = more; - - rc = gprs_llc_tx_ui(fmsg, lle->sapi, 0, fs->mmcontext, true); - /* abort in case of error, do not advance frag_nr / next_byte */ - if (rc < 0) { - msgb_free(fs->msg); - return rc; - } - - if (!more) { - /* we've sent all fragments */ - msgb_free(fs->msg); - memset(fs, 0, sizeof(*fs)); - /* increment NPDU number for next frame */ - sne->tx_npdu_nr = (sne->tx_npdu_nr + 1) % 0xfff; - return 0; - } - - /* default: more fragments to send */ - return 1; -} - -/* Request transmission of a SN-PDU over specified LLC Entity + SAPI */ -int sndcp_unitdata_req(struct msgb *msg, struct gprs_llc_lle *lle, uint8_t nsapi, - void *mmcontext) -{ - struct gprs_sndcp_entity *sne; - struct sndcp_common_hdr *sch; - struct sndcp_comp_hdr *scomph; - struct sndcp_udata_hdr *suh; - struct sndcp_frag_state fs; - uint8_t pcomp = 0; - uint8_t dcomp = 0; - int rc; - - /* Identifiers from UP: (TLLI, SAPI) + (BVCI, NSEI) */ - - /* Compress packet */ -#if DEBUG_IP_PACKETS == 1 - DEBUGP(DSNDCP, " \n"); - DEBUGP(DSNDCP, ":::::::::::::::::::::::::::::::::::::::::::::::::::\n"); - DEBUGP(DSNDCP, "===================================================\n"); - debug_ip_packet(msg->data, msg->len, 0, "sndcp_initdata_req()"); -#endif - if (any_pcomp_or_dcomp_active(sgsn)) { - - /* Apply header compression */ - rc = gprs_sndcp_pcomp_compress(msg->data, msg->len, &pcomp, - lle->llme->comp.proto, nsapi); - if (rc < 0) { - LOGP(DSNDCP, LOGL_ERROR, - "TCP/IP Header compression failed!\n"); - return -EIO; - } - - /* Fixup pointer locations and sizes in message buffer to match - * the new, compressed buffer size */ - msgb_get(msg, msg->len); - msgb_put(msg, rc); - - /* Apply data compression */ - rc = gprs_sndcp_dcomp_compress(msg->data, msg->len, &dcomp, - lle->llme->comp.data, nsapi); - if (rc < 0) { - LOGP(DSNDCP, LOGL_ERROR, "Data compression failed!\n"); - return -EIO; - } - - /* Fixup pointer locations and sizes in message buffer to match - * the new, compressed buffer size */ - msgb_get(msg, msg->len); - msgb_put(msg, rc); - } -#if DEBUG_IP_PACKETS == 1 - DEBUGP(DSNDCP, "===================================================\n"); - DEBUGP(DSNDCP, ":::::::::::::::::::::::::::::::::::::::::::::::::::\n"); - DEBUGP(DSNDCP, " \n"); -#endif - - sne = gprs_sndcp_entity_by_lle(lle, nsapi); - if (!sne) { - LOGP(DSNDCP, LOGL_ERROR, "Cannot find SNDCP Entity\n"); - msgb_free(msg); - return -EIO; - } - - /* Check if we need to fragment this N-PDU into multiple SN-PDUs */ - if (msg->len > lle->params.n201_u - - (sizeof(*sch) + sizeof(*suh) + sizeof(*scomph))) { - /* initialize the fragmenter state */ - fs.msg = msg; - fs.frag_nr = 0; - fs.next_byte = msg->data; - fs.sne = sne; - fs.mmcontext = mmcontext; - - /* call function to generate and send fragments until all - * of the N-PDU has been sent */ - while (1) { - int rc = sndcp_send_ud_frag(&fs,pcomp,dcomp); - if (rc == 0) - return 0; - if (rc < 0) - return rc; - } - /* not reached */ - return 0; - } - - /* this is the non-fragmenting case where we only build 1 SN-PDU */ - - /* prepend the user-data header */ - suh = (struct sndcp_udata_hdr *) msgb_push(msg, sizeof(*suh)); - suh->npdu_low = sne->tx_npdu_nr & 0xff; - suh->npdu_high = (sne->tx_npdu_nr >> 8) & 0xf; - suh->seg_nr = 0; - sne->tx_npdu_nr = (sne->tx_npdu_nr + 1) % 0xfff; - - scomph = (struct sndcp_comp_hdr *) msgb_push(msg, sizeof(*scomph)); - scomph->pcomp = pcomp; - scomph->dcomp = dcomp; - - /* prepend common SNDCP header */ - sch = (struct sndcp_common_hdr *) msgb_push(msg, sizeof(*sch)); - sch->first = 1; - sch->type = 1; - sch->nsapi = nsapi; - - return gprs_llc_tx_ui(msg, lle->sapi, 0, mmcontext, true); -} - -/* Section 5.1.2.17 LL-UNITDATA.ind */ -int sndcp_llunitdata_ind(struct msgb *msg, struct gprs_llc_lle *lle, - uint8_t *hdr, uint16_t len) -{ - struct gprs_sndcp_entity *sne; - struct sndcp_common_hdr *sch = (struct sndcp_common_hdr *)hdr; - struct sndcp_comp_hdr *scomph = NULL; - struct sndcp_udata_hdr *suh; - uint8_t *npdu; - uint16_t npdu_num __attribute__((unused)); - int npdu_len; - int rc; - uint8_t *expnd = NULL; - - sch = (struct sndcp_common_hdr *) hdr; - if (sch->first) { - scomph = (struct sndcp_comp_hdr *) (hdr + 1); - suh = (struct sndcp_udata_hdr *) (hdr + 1 + sizeof(struct sndcp_common_hdr)); - } else - suh = (struct sndcp_udata_hdr *) (hdr + sizeof(struct sndcp_common_hdr)); - - if (sch->type == 0) { - LOGP(DSNDCP, LOGL_ERROR, "SN-DATA PDU at unitdata_ind() function\n"); - return -EINVAL; - } - - if (len < sizeof(*sch) + sizeof(*suh)) { - LOGP(DSNDCP, LOGL_ERROR, "SN-UNITDATA PDU too short (%u)\n", len); - return -EIO; - } - - sne = gprs_sndcp_entity_by_lle(lle, sch->nsapi); - if (!sne) { - LOGP(DSNDCP, LOGL_ERROR, "Message for non-existing SNDCP Entity " - "(lle=%p, TLLI=%08x, SAPI=%u, NSAPI=%u)\n", lle, - lle->llme->tlli, lle->sapi, sch->nsapi); - return -EIO; - } - /* FIXME: move this RA_ID up to the LLME or even higher */ - bssgp_parse_cell_id(&sne->ra_id, msgb_bcid(msg)); - - if (scomph) { - sne->defrag.pcomp = scomph->pcomp; - sne->defrag.dcomp = scomph->dcomp; - sne->defrag.proto = lle->llme->comp.proto; - sne->defrag.data = lle->llme->comp.data; - } - - /* any non-first segment is by definition something to defragment - * as is any segment that tells us there are more segments */ - if (!sch->first || sch->more) - return defrag_input(sne, msg, hdr, len); - - npdu_num = (suh->npdu_high << 8) | suh->npdu_low; - npdu = (uint8_t *)suh + sizeof(*suh); - npdu_len = (msg->data + msg->len) - npdu - 3; /* -3 'removes' the FCS */ - - if (npdu_len <= 0) { - LOGP(DSNDCP, LOGL_ERROR, "Short SNDCP N-PDU: %d\n", npdu_len); - return -EIO; - } - /* actually send the N-PDU to the SGSN core code, which then - * hands it off to the correct GTP tunnel + GGSN via gtp_data_req() */ - - /* Decompress packet */ -#if DEBUG_IP_PACKETS == 1 - DEBUGP(DSNDCP, " \n"); - DEBUGP(DSNDCP, ":::::::::::::::::::::::::::::::::::::::::::::::::::\n"); - DEBUGP(DSNDCP, "===================================================\n"); -#endif - if (any_pcomp_or_dcomp_active(sgsn)) { - - expnd = talloc_zero_size(msg, npdu_len * MAX_DATADECOMPR_FAC + - MAX_HDRDECOMPR_INCR); - memcpy(expnd, npdu, npdu_len); - - /* Apply data decompression */ - rc = gprs_sndcp_dcomp_expand(expnd, npdu_len, sne->defrag.dcomp, - sne->defrag.data); - if (rc < 0) { - LOGP(DSNDCP, LOGL_ERROR, - "Data decompression failed!\n"); - talloc_free(expnd); - return -EIO; - } - - /* Apply header decompression */ - rc = gprs_sndcp_pcomp_expand(expnd, rc, sne->defrag.pcomp, - sne->defrag.proto); - if (rc < 0) { - LOGP(DSNDCP, LOGL_ERROR, - "TCP/IP Header decompression failed!\n"); - talloc_free(expnd); - return -EIO; - } - - /* Modify npu length, expnd is handed directly handed - * over to gsn_rx_sndcp_ud_ind(), see below */ - npdu_len = rc; - } else - expnd = npdu; -#if DEBUG_IP_PACKETS == 1 - debug_ip_packet(expnd, npdu_len, 1, "sndcp_llunitdata_ind()"); - DEBUGP(DSNDCP, "===================================================\n"); - DEBUGP(DSNDCP, ":::::::::::::::::::::::::::::::::::::::::::::::::::\n"); - DEBUGP(DSNDCP, " \n"); -#endif - - /* Hand off packet to gtp */ - rc = sgsn_rx_sndcp_ud_ind(&sne->ra_id, lle->llme->tlli, - sne->nsapi, msg, npdu_len, expnd); - - if (any_pcomp_or_dcomp_active(sgsn)) - talloc_free(expnd); - - return rc; -} - -#if 0 -/* Section 5.1.2.1 LL-RESET.ind */ -static int sndcp_ll_reset_ind(struct gprs_sndcp_entity *se) -{ - /* treat all outstanding SNDCP-LLC request type primitives as not sent */ - /* reset all SNDCP XID parameters to default values */ - LOGP(DSNDCP, LOGL_NOTICE, "not implemented.\n"); - return 0; -} - -static int sndcp_ll_status_ind() -{ - /* inform the SM sub-layer by means of SNSM-STATUS.req */ - LOGP(DSNDCP, LOGL_NOTICE, "not implemented.\n"); - return 0; -} - -static struct sndcp_state_list {{ - uint32_t states; - unsigned int type; - int (*rout)(struct gprs_sndcp_entity *se, struct msgb *msg); -} sndcp_state_list[] = { - { ALL_STATES, - LL_RESET_IND, sndcp_ll_reset_ind }, - { ALL_STATES, - LL_ESTABLISH_IND, sndcp_ll_est_ind }, - { SBIT(SNDCP_S_EST_RQD), - LL_ESTABLISH_RESP, sndcp_ll_est_ind }, - { SBIT(SNDCP_S_EST_RQD), - LL_ESTABLISH_CONF, sndcp_ll_est_conf }, - { SBIT(SNDCP_S_ -}; - -static int sndcp_rx_llc_prim() -{ - case LL_ESTABLISH_REQ: - case LL_RELEASE_REQ: - case LL_XID_REQ: - case LL_DATA_REQ: - LL_UNITDATA_REQ, /* TLLI, SN-PDU, Ref, QoS, Radio Prio, Ciph */ - - switch (prim) { - case LL_RESET_IND: - case LL_ESTABLISH_IND: - case LL_ESTABLISH_RESP: - case LL_ESTABLISH_CONF: - case LL_RELEASE_IND: - case LL_RELEASE_CONF: - case LL_XID_IND: - case LL_XID_RESP: - case LL_XID_CONF: - case LL_DATA_IND: - case LL_DATA_CONF: - case LL_UNITDATA_IND: - case LL_STATUS_IND: - } -} -#endif - -/* Generate SNDCP-XID message */ -static int gprs_llc_gen_sndcp_xid(uint8_t *bytes, int bytes_len, uint8_t nsapi) -{ - int entity = 0; - LLIST_HEAD(comp_fields); - struct gprs_sndcp_pcomp_rfc1144_params rfc1144_params; - struct gprs_sndcp_comp_field rfc1144_comp_field; - struct gprs_sndcp_dcomp_v42bis_params v42bis_params; - struct gprs_sndcp_comp_field v42bis_comp_field; - - memset(&rfc1144_comp_field, 0, sizeof(struct gprs_sndcp_comp_field)); - memset(&v42bis_comp_field, 0, sizeof(struct gprs_sndcp_comp_field)); - - /* Setup rfc1144 */ - if (sgsn->cfg.pcomp_rfc1144.active) { - rfc1144_params.nsapi[0] = nsapi; - rfc1144_params.nsapi_len = 1; - rfc1144_params.s01 = sgsn->cfg.pcomp_rfc1144.s01; - rfc1144_comp_field.p = 1; - rfc1144_comp_field.entity = entity; - rfc1144_comp_field.algo = RFC_1144; - rfc1144_comp_field.comp[RFC1144_PCOMP1] = 1; - rfc1144_comp_field.comp[RFC1144_PCOMP2] = 2; - rfc1144_comp_field.comp_len = RFC1144_PCOMP_NUM; - rfc1144_comp_field.rfc1144_params = &rfc1144_params; - entity++; - llist_add(&rfc1144_comp_field.list, &comp_fields); - } - - /* Setup V.42bis */ - if (sgsn->cfg.dcomp_v42bis.active) { - v42bis_params.nsapi[0] = nsapi; - v42bis_params.nsapi_len = 1; - v42bis_params.p0 = sgsn->cfg.dcomp_v42bis.p0; - v42bis_params.p1 = sgsn->cfg.dcomp_v42bis.p1; - v42bis_params.p2 = sgsn->cfg.dcomp_v42bis.p2; - v42bis_comp_field.p = 1; - v42bis_comp_field.entity = entity; - v42bis_comp_field.algo = V42BIS; - v42bis_comp_field.comp[V42BIS_DCOMP1] = 1; - v42bis_comp_field.comp_len = V42BIS_DCOMP_NUM; - v42bis_comp_field.v42bis_params = &v42bis_params; - entity++; - llist_add(&v42bis_comp_field.list, &comp_fields); - } - - /* Do not attempt to compile anything if there is no data in the list */ - if (llist_empty(&comp_fields)) - return 0; - - /* Compile bytestream */ - return gprs_sndcp_compile_xid(bytes, bytes_len, &comp_fields, - DEFAULT_SNDCP_VERSION); -} - -/* Set of SNDCP-XID bnegotiation (See also: TS 144 065, - * Section 6.8 XID parameter negotiation) */ -int sndcp_sn_xid_req(struct gprs_llc_lle *lle, uint8_t nsapi) -{ - /* Note: The specification requires the SNDCP-User to set of an - * SNDCP xid request. See also 3GPP TS 44.065, 6.8 XID parameter - * negotiation, Figure 11: SNDCP XID negotiation procedure. In - * our case the SNDCP-User is sgsn_libgtp.c, which calls - * sndcp_sn_xid_req directly. */ - - uint8_t l3params[1024]; - int xid_len; - struct gprs_llc_xid_field xid_field_request; - - /* Wipe off all compression entities and their states to - * get rid of possible leftovers from a previous session */ - gprs_sndcp_comp_free(lle->llme->comp.proto); - gprs_sndcp_comp_free(lle->llme->comp.data); - lle->llme->comp.proto = gprs_sndcp_comp_alloc(lle->llme); - lle->llme->comp.data = gprs_sndcp_comp_alloc(lle->llme); - talloc_free(lle->llme->xid); - lle->llme->xid = NULL; - - /* Generate compression parameter bytestream */ - xid_len = gprs_llc_gen_sndcp_xid(l3params, sizeof(l3params), nsapi); - - /* Send XID with the SNDCP-XID bytetsream included */ - if (xid_len > 0) { - xid_field_request.type = GPRS_LLC_XID_T_L3_PAR; - xid_field_request.data = l3params; - xid_field_request.data_len = xid_len; - return gprs_ll_xid_req(lle, &xid_field_request); - } - - /* When bytestream can not be generated, proceed without SNDCP-XID */ - return gprs_ll_xid_req(lle, NULL); - -} - -/* Handle header compression entites */ -static int handle_pcomp_entities(struct gprs_sndcp_comp_field *comp_field, - struct gprs_llc_lle *lle) -{ - /* Note: This functions also transforms the comp_field into its - * echo form (strips comp values, resets propose bit etc...) - * the processed comp_fields can then be sent back as XID- - * Response without further modification. */ - - /* Delete propose bit */ - comp_field->p = 0; - - /* Process proposed parameters */ - switch (comp_field->algo) { - case RFC_1144: - if (sgsn->cfg.pcomp_rfc1144.passive - && comp_field->rfc1144_params->nsapi_len > 0) { - DEBUGP(DSNDCP, - "Accepting RFC1144 header compression...\n"); - gprs_sndcp_comp_add(lle->llme, lle->llme->comp.proto, - comp_field); - } else { - DEBUGP(DSNDCP, - "Rejecting RFC1144 header compression...\n"); - gprs_sndcp_comp_delete(lle->llme->comp.proto, - comp_field->entity); - comp_field->rfc1144_params->nsapi_len = 0; - } - break; - case RFC_2507: - /* RFC 2507 is not yet supported, - * so we set applicable nsapis to zero */ - DEBUGP(DSNDCP, "Rejecting RFC2507 header compression...\n"); - comp_field->rfc2507_params->nsapi_len = 0; - gprs_sndcp_comp_delete(lle->llme->comp.proto, - comp_field->entity); - break; - case ROHC: - /* ROHC is not yet supported, - * so we set applicable nsapis to zero */ - DEBUGP(DSNDCP, "Rejecting ROHC header compression...\n"); - comp_field->rohc_params->nsapi_len = 0; - gprs_sndcp_comp_delete(lle->llme->comp.proto, - comp_field->entity); - break; - } - - return 0; -} - -/* Hanle data compression entites */ -static int handle_dcomp_entities(struct gprs_sndcp_comp_field *comp_field, - struct gprs_llc_lle *lle) -{ - /* See note in handle_pcomp_entities() */ - - /* Delete propose bit */ - comp_field->p = 0; - - /* Process proposed parameters */ - switch (comp_field->algo) { - case V42BIS: - if (sgsn->cfg.dcomp_v42bis.passive && - comp_field->v42bis_params->nsapi_len > 0) { - DEBUGP(DSNDCP, - "Accepting V.42bis data compression...\n"); - gprs_sndcp_comp_add(lle->llme, lle->llme->comp.data, - comp_field); - } else { - LOGP(DSNDCP, LOGL_DEBUG, - "Rejecting V.42bis data compression...\n"); - gprs_sndcp_comp_delete(lle->llme->comp.data, - comp_field->entity); - comp_field->v42bis_params->nsapi_len = 0; - } - break; - case V44: - /* V44 is not yet supported, - * so we set applicable nsapis to zero */ - DEBUGP(DSNDCP, "Rejecting V.44 data compression...\n"); - comp_field->v44_params->nsapi_len = 0; - gprs_sndcp_comp_delete(lle->llme->comp.data, - comp_field->entity); - break; - } - - return 0; - -} - -/* Process SNDCP-XID indication - * (See also: TS 144 065, Section 6.8 XID parameter negotiation) */ -int sndcp_sn_xid_ind(struct gprs_llc_xid_field *xid_field_indication, - struct gprs_llc_xid_field *xid_field_response, - struct gprs_llc_lle *lle) -{ - /* Note: This function computes the SNDCP-XID response that is sent - * back to the ms when a ms originated XID is received. The - * Input XID fields are directly processed and the result is directly - * handed back. */ - - int rc; - int compclass; - int version; - - struct llist_head *comp_fields; - struct gprs_sndcp_comp_field *comp_field; - - OSMO_ASSERT(xid_field_indication); - OSMO_ASSERT(xid_field_response); - OSMO_ASSERT(lle); - - /* Parse SNDCP-CID XID-Field */ - comp_fields = gprs_sndcp_parse_xid(&version, lle->llme, - xid_field_indication->data, - xid_field_indication->data_len, - NULL); - if (!comp_fields) - return -EINVAL; - - /* Handle compression entites */ - DEBUGP(DSNDCP, "SNDCP-XID-IND (ms):\n"); - gprs_sndcp_dump_comp_fields(comp_fields, LOGL_DEBUG); - - llist_for_each_entry(comp_field, comp_fields, list) { - compclass = gprs_sndcp_get_compression_class(comp_field); - if (compclass == SNDCP_XID_PROTOCOL_COMPRESSION) - rc = handle_pcomp_entities(comp_field, lle); - else if (compclass == SNDCP_XID_DATA_COMPRESSION) - rc = handle_dcomp_entities(comp_field, lle); - else { - gprs_sndcp_comp_delete(lle->llme->comp.proto, - comp_field->entity); - gprs_sndcp_comp_delete(lle->llme->comp.data, - comp_field->entity); - rc = 0; - } - - if (rc < 0) { - talloc_free(comp_fields); - return -EINVAL; - } - } - - DEBUGP(DSNDCP, "SNDCP-XID-RES (sgsn):\n"); - gprs_sndcp_dump_comp_fields(comp_fields, LOGL_DEBUG); - - /* Reserve some memory to store the modified SNDCP-XID bytes */ - xid_field_response->data = - talloc_zero_size(lle->llme, xid_field_indication->data_len); - - /* Set Type flag for response */ - xid_field_response->type = GPRS_LLC_XID_T_L3_PAR; - - /* Compile modified SNDCP-XID bytes */ - rc = gprs_sndcp_compile_xid(xid_field_response->data, - xid_field_indication->data_len, - comp_fields, 0); - - if (rc > 0) - xid_field_response->data_len = rc; - else { - talloc_free(xid_field_response->data); - xid_field_response->data = NULL; - xid_field_response->data_len = 0; - return -EINVAL; - } - - talloc_free(comp_fields); - - return 0; -} - -/* Process SNDCP-XID indication - * (See also: TS 144 065, Section 6.8 XID parameter negotiation) */ -int sndcp_sn_xid_conf(struct gprs_llc_xid_field *xid_field_conf, - struct gprs_llc_xid_field *xid_field_request, - struct gprs_llc_lle *lle) -{ - /* Note: This function handles an incomming SNDCP-XID confirmiation. - * Since the confirmation fields may lack important parameters we - * will reconstruct these missing fields using the original request - * we have sent. After that we will create (or delete) the - * compression entites */ - - struct llist_head *comp_fields_req; - struct llist_head *comp_fields_conf; - struct gprs_sndcp_comp_field *comp_field; - int rc; - int compclass; - - /* We need both, the confirmation that is sent back by the ms, - * and the original request we have sent. If one of this is missing - * we can not process the confirmation, the caller must check if - * request and confirmation fields are available. */ - OSMO_ASSERT(xid_field_conf); - OSMO_ASSERT(xid_field_request); - - /* Parse SNDCP-CID XID-Field */ - comp_fields_req = gprs_sndcp_parse_xid(NULL, lle->llme, - xid_field_request->data, - xid_field_request->data_len, - NULL); - if (!comp_fields_req) - return -EINVAL; - - DEBUGP(DSNDCP, "SNDCP-XID-REQ (sgsn):\n"); - gprs_sndcp_dump_comp_fields(comp_fields_req, LOGL_DEBUG); - - /* Parse SNDCP-CID XID-Field */ - comp_fields_conf = gprs_sndcp_parse_xid(NULL, lle->llme, - xid_field_conf->data, - xid_field_conf->data_len, - comp_fields_req); - if (!comp_fields_conf) - return -EINVAL; - - DEBUGP(DSNDCP, "SNDCP-XID-CONF (ms):\n"); - gprs_sndcp_dump_comp_fields(comp_fields_conf, LOGL_DEBUG); - - /* Handle compression entites */ - llist_for_each_entry(comp_field, comp_fields_conf, list) { - compclass = gprs_sndcp_get_compression_class(comp_field); - if (compclass == SNDCP_XID_PROTOCOL_COMPRESSION) - rc = handle_pcomp_entities(comp_field, lle); - else if (compclass == SNDCP_XID_DATA_COMPRESSION) - rc = handle_dcomp_entities(comp_field, lle); - else { - gprs_sndcp_comp_delete(lle->llme->comp.proto, - comp_field->entity); - gprs_sndcp_comp_delete(lle->llme->comp.data, - comp_field->entity); - rc = 0; - } - - if (rc < 0) { - talloc_free(comp_fields_req); - talloc_free(comp_fields_conf); - return -EINVAL; - } - } - - talloc_free(comp_fields_req); - talloc_free(comp_fields_conf); - - return 0; -} diff --git a/openbsc/src/gprs/gprs_sndcp_comp.c b/openbsc/src/gprs/gprs_sndcp_comp.c deleted file mode 100644 index a12c39aa6..000000000 --- a/openbsc/src/gprs/gprs_sndcp_comp.c +++ /dev/null @@ -1,323 +0,0 @@ -/* GPRS SNDCP header compression entity management tools */ - -/* (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> - * All Rights Reserved - * - * Author: Philipp Maier - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <stdio.h> -#include <string.h> -#include <stdint.h> -#include <math.h> -#include <errno.h> -#include <stdbool.h> - -#include <osmocom/core/linuxlist.h> -#include <osmocom/core/talloc.h> -#include <osmocom/core/utils.h> - -#include <openbsc/debug.h> -#include <openbsc/gprs_sndcp_xid.h> -#include <openbsc/gprs_sndcp_comp.h> -#include <openbsc/gprs_sndcp_pcomp.h> -#include <openbsc/gprs_sndcp_dcomp.h> - -/* Create a new compression entity from a XID-Field */ -static struct gprs_sndcp_comp *gprs_sndcp_comp_create(const void *ctx, - const struct - gprs_sndcp_comp_field - *comp_field) -{ - struct gprs_sndcp_comp *comp_entity; - comp_entity = talloc_zero(ctx, struct gprs_sndcp_comp); - - /* Copy relevant information from the SNDCP-XID field */ - comp_entity->entity = comp_field->entity; - comp_entity->comp_len = comp_field->comp_len; - memcpy(comp_entity->comp, comp_field->comp, sizeof(comp_entity->comp)); - - if (comp_field->rfc1144_params) { - comp_entity->nsapi_len = comp_field->rfc1144_params->nsapi_len; - memcpy(comp_entity->nsapi, - comp_field->rfc1144_params->nsapi, - sizeof(comp_entity->nsapi)); - } else if (comp_field->rfc2507_params) { - comp_entity->nsapi_len = comp_field->rfc2507_params->nsapi_len; - memcpy(comp_entity->nsapi, - comp_field->rfc2507_params->nsapi, - sizeof(comp_entity->nsapi)); - } else if (comp_field->rohc_params) { - comp_entity->nsapi_len = comp_field->rohc_params->nsapi_len; - memcpy(comp_entity->nsapi, comp_field->rohc_params->nsapi, - sizeof(comp_entity->nsapi)); - } else if (comp_field->v42bis_params) { - comp_entity->nsapi_len = comp_field->v42bis_params->nsapi_len; - memcpy(comp_entity->nsapi, - comp_field->v42bis_params->nsapi, - sizeof(comp_entity->nsapi)); - } else if (comp_field->v44_params) { - comp_entity->nsapi_len = comp_field->v44_params->nsapi_len; - memcpy(comp_entity->nsapi, - comp_field->v44_params->nsapi, - sizeof(comp_entity->nsapi)); - } else { - /* The caller is expected to check carefully if the all - * data fields required for compression entity creation - * are present. Otherwise we blow an assertion here */ - OSMO_ASSERT(false); - } - comp_entity->algo = comp_field->algo; - - /* Check if an NSAPI is selected, if not, it does not make sense - * to create the compression entity, since the caller should - * have checked the presence of the NSAPI, we blow an assertion - * in case of missing NSAPIs */ - OSMO_ASSERT(comp_entity->nsapi_len > 0); - - /* Determine of which class our compression entity will be - * (Protocol or Data compresson ?) */ - comp_entity->compclass = gprs_sndcp_get_compression_class(comp_field); - - OSMO_ASSERT(comp_entity->compclass != -1); - - /* Create an algorithm specific compression context */ - if (comp_entity->compclass == SNDCP_XID_PROTOCOL_COMPRESSION) { - if (gprs_sndcp_pcomp_init(ctx, comp_entity, comp_field) != 0) { - talloc_free(comp_entity); - comp_entity = NULL; - } - } else { - if (gprs_sndcp_dcomp_init(ctx, comp_entity, comp_field) != 0) { - talloc_free(comp_entity); - comp_entity = NULL; - } - } - - /* Bail on failure */ - if (comp_entity == NULL) { - LOGP(DSNDCP, LOGL_ERROR, - "Compression entity creation failed!\n"); - return NULL; - } - - /* Display info message */ - if (comp_entity->compclass == SNDCP_XID_PROTOCOL_COMPRESSION) { - LOGP(DSNDCP, LOGL_INFO, - "New header compression entity (%d) created.\n", - comp_entity->entity); - } else { - LOGP(DSNDCP, LOGL_INFO, - "New data compression entity (%d) created.\n", - comp_entity->entity); - } - - return comp_entity; -} - -/* Allocate a compression enitiy list */ -struct llist_head *gprs_sndcp_comp_alloc(const void *ctx) -{ - struct llist_head *lh; - - lh = talloc_zero(ctx, struct llist_head); - INIT_LLIST_HEAD(lh); - - return lh; -} - -/* Free a compression entitiy list */ -void gprs_sndcp_comp_free(struct llist_head *comp_entities) -{ - struct gprs_sndcp_comp *comp_entity; - - /* We expect the caller to take care of allocating a - * compression entity list properly. Attempting to - * free a non existing list clearly points out - * a malfunction. */ - OSMO_ASSERT(comp_entities); - - llist_for_each_entry(comp_entity, comp_entities, list) { - /* Free compression entity */ - if (comp_entity->compclass == SNDCP_XID_PROTOCOL_COMPRESSION) { - LOGP(DSNDCP, LOGL_INFO, - "Deleting header compression entity %d ...\n", - comp_entity->entity); - gprs_sndcp_pcomp_term(comp_entity); - } else { - LOGP(DSNDCP, LOGL_INFO, - "Deleting data compression entity %d ...\n", - comp_entity->entity); - gprs_sndcp_dcomp_term(comp_entity); - } - } - - talloc_free(comp_entities); -} - -/* Delete a compression entity */ -void gprs_sndcp_comp_delete(struct llist_head *comp_entities, - unsigned int entity) -{ - struct gprs_sndcp_comp *comp_entity; - struct gprs_sndcp_comp *comp_entity_to_delete = NULL; - - OSMO_ASSERT(comp_entities); - - llist_for_each_entry(comp_entity, comp_entities, list) { - if (comp_entity->entity == entity) { - comp_entity_to_delete = comp_entity; - break; - } - } - - if (!comp_entity_to_delete) - return; - - if (comp_entity_to_delete->compclass == SNDCP_XID_PROTOCOL_COMPRESSION) { - LOGP(DSNDCP, LOGL_INFO, - "Deleting header compression entity %d ...\n", - comp_entity_to_delete->entity); - gprs_sndcp_pcomp_term(comp_entity_to_delete); - } else { - LOGP(DSNDCP, LOGL_INFO, - "Deleting data compression entity %d ...\n", - comp_entity_to_delete->entity); - } - - /* Delete compression entity */ - llist_del(&comp_entity_to_delete->list); - talloc_free(comp_entity_to_delete); -} - -/* Create and Add a new compression entity - * (returns a pointer to the compression entity that has just been created) */ -struct gprs_sndcp_comp *gprs_sndcp_comp_add(const void *ctx, - struct llist_head *comp_entities, - const struct gprs_sndcp_comp_field - *comp_field) -{ - struct gprs_sndcp_comp *comp_entity; - - OSMO_ASSERT(comp_entities); - OSMO_ASSERT(comp_field); - - /* Just to be sure, if the entity is already in - * the list it will be deleted now */ - gprs_sndcp_comp_delete(comp_entities, comp_field->entity); - - /* Create and add a new entity to the list */ - comp_entity = gprs_sndcp_comp_create(ctx, comp_field); - - if (!comp_entity) - return NULL; - - llist_add(&comp_entity->list, comp_entities); - return comp_entity; -} - -/* Find which compression entity handles the specified pcomp/dcomp */ -struct gprs_sndcp_comp *gprs_sndcp_comp_by_comp(const struct llist_head - *comp_entities, uint8_t comp) -{ - struct gprs_sndcp_comp *comp_entity; - int i; - - OSMO_ASSERT(comp_entities); - - llist_for_each_entry(comp_entity, comp_entities, list) { - for (i = 0; i < comp_entity->comp_len; i++) { - if (comp_entity->comp[i] == comp) - return comp_entity; - } - } - - LOGP(DSNDCP, LOGL_ERROR, - "Could not find a matching compression entity for given pcomp/dcomp value %d.\n", - comp); - return NULL; -} - -/* Find which compression entity handles the specified nsapi */ -struct gprs_sndcp_comp *gprs_sndcp_comp_by_nsapi(const struct llist_head - *comp_entities, uint8_t nsapi) -{ - struct gprs_sndcp_comp *comp_entity; - int i; - - OSMO_ASSERT(comp_entities); - - llist_for_each_entry(comp_entity, comp_entities, list) { - for (i = 0; i < comp_entity->nsapi_len; i++) { - if (comp_entity->nsapi[i] == nsapi) - return comp_entity; - } - } - - return NULL; -} - -/* Find a comp_index for a given pcomp/dcomp value */ -uint8_t gprs_sndcp_comp_get_idx(const struct gprs_sndcp_comp *comp_entity, - uint8_t comp) -{ - /* Note: This function returns a normalized version of the comp value, - * which matches up with the position of the comp field. Since comp=0 - * is reserved for "no compression", the index value starts counting - * at one. The return value is the PCOMPn/DCOMPn value one can find - * in the Specification (see e.g. 3GPP TS 44.065, 6.5.3.2, Table 7) */ - - int i; - OSMO_ASSERT(comp_entity); - - /* A pcomp/dcomp value of zero is reserved for "no comproession", - * So we just bail and return zero in this case */ - if (comp == 0) - return 0; - - /* Look in the pcomp/dcomp list for the index */ - for (i = 0; i < comp_entity->comp_len; i++) { - if (comp_entity->comp[i] == comp) - return i + 1; - } - - LOGP(DSNDCP, LOGL_ERROR, - "Could not find a matching comp_index for given pcomp/dcomp value %d\n", - comp); - return 0; -} - -/* Find a pcomp/dcomp value for a given comp_index */ -uint8_t gprs_sndcp_comp_get_comp(const struct gprs_sndcp_comp *comp_entity, - uint8_t comp_index) -{ - OSMO_ASSERT(comp_entity); - - /* A comp_index of zero translates to zero right away. */ - if (comp_index == 0) - return 0; - - if (comp_index > comp_entity->comp_len) { - LOGP(DSNDCP, LOGL_ERROR, - "Could not find a matching pcomp/dcomp value for given comp_index value %d.\n", - comp_index); - return 0; - } - - /* Look in the pcomp/dcomp list for the comp_index, see - * note in gprs_sndcp_comp_get_idx() */ - return comp_entity->comp[comp_index - 1]; -} diff --git a/openbsc/src/gprs/gprs_sndcp_dcomp.c b/openbsc/src/gprs/gprs_sndcp_dcomp.c deleted file mode 100644 index b0f95b486..000000000 --- a/openbsc/src/gprs/gprs_sndcp_dcomp.c +++ /dev/null @@ -1,358 +0,0 @@ -/* GPRS SNDCP data compression handler */ - -/* (C) 2016 by Sysmocom s.f.m.c. GmbH - * All Rights Reserved - * - * Author: Philipp Maier - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <stdio.h> -#include <string.h> -#include <stdint.h> -#include <math.h> -#include <errno.h> -#include <stdbool.h> - -#include <osmocom/core/utils.h> -#include <osmocom/core/msgb.h> -#include <osmocom/core/linuxlist.h> -#include <osmocom/core/talloc.h> -#include <osmocom/gsm/tlv.h> - -#include <openbsc/gprs_llc.h> -#include <openbsc/sgsn.h> -#include <openbsc/gprs_sndcp_xid.h> -#include <openbsc/v42bis.h> -#include <openbsc/v42bis_private.h> -#include <openbsc/debug.h> -#include <openbsc/gprs_sndcp_comp.h> -#include <openbsc/gprs_sndcp_dcomp.h> - -/* A struct to capture the output data of compressor and decompressor */ -struct v42bis_output_buffer { - uint8_t *buf; - uint8_t *buf_pointer; - int len; -}; - -/* Handler to capture the output data from the compressor */ -void tx_v42bis_frame_handler(void *user_data, const uint8_t *pkt, int len) -{ - struct v42bis_output_buffer *output_buffer = - (struct v42bis_output_buffer *)user_data; - memcpy(output_buffer->buf_pointer, pkt, len); - output_buffer->buf_pointer += len; - output_buffer->len += len; - return; -} - -/* Handler to capture the output data from the decompressor */ -void rx_v42bis_data_handler(void *user_data, const uint8_t *buf, int len) -{ - struct v42bis_output_buffer *output_buffer = - (struct v42bis_output_buffer *)user_data; - memcpy(output_buffer->buf_pointer, buf, len); - output_buffer->buf_pointer += len; - output_buffer->len += len; - return; -} - -/* Initalize data compression */ -int gprs_sndcp_dcomp_init(const void *ctx, struct gprs_sndcp_comp *comp_entity, - const struct gprs_sndcp_comp_field *comp_field) -{ - /* Note: This function is automatically called from - * gprs_sndcp_comp.c when a new data compression - * entity is created by gprs_sndcp.c */ - - OSMO_ASSERT(comp_entity); - OSMO_ASSERT(comp_field); - - if (comp_entity->compclass == SNDCP_XID_DATA_COMPRESSION - && comp_entity->algo == V42BIS) { - OSMO_ASSERT(comp_field->v42bis_params); - comp_entity->state = - v42bis_init(ctx, NULL, comp_field->v42bis_params->p0, - comp_field->v42bis_params->p1, - comp_field->v42bis_params->p2, - &tx_v42bis_frame_handler, NULL, - V42BIS_MAX_OUTPUT_LENGTH, - &rx_v42bis_data_handler, NULL, - V42BIS_MAX_OUTPUT_LENGTH); - LOGP(DSNDCP, LOGL_INFO, - "V.42bis data compression initalized.\n"); - return 0; - } - - /* Just in case someone tries to initalize an unknown or unsupported - * data compresson. Since everything is checked during the SNDCP - * negotiation process, this should never happen! */ - OSMO_ASSERT(false); -} - -/* Terminate data compression */ -void gprs_sndcp_dcomp_term(struct gprs_sndcp_comp *comp_entity) -{ - /* Note: This function is automatically called from - * gprs_sndcp_comp.c when a data compression - * entity is deleted by gprs_sndcp.c */ - - OSMO_ASSERT(comp_entity); - - if (comp_entity->compclass == SNDCP_XID_DATA_COMPRESSION - && comp_entity->algo == V42BIS) { - if (comp_entity->state) { - v42bis_free((v42bis_state_t *) comp_entity->state); - comp_entity->state = NULL; - } - LOGP(DSNDCP, LOGL_INFO, - "V.42bis data compression terminated.\n"); - return; - } - - /* Just in case someone tries to terminate an unknown or unsupported - * data compresson. Since everything is checked during the SNDCP - * negotiation process, this should never happen! */ - OSMO_ASSERT(false); -} - -/* Perform a full reset of the V.42bis compression state */ -static void v42bis_reset(v42bis_state_t *comp) -{ - /* This function performs a complete reset of the V.42bis compression - * state by reinitalizing the state withe the previously negotiated - * parameters. */ - - int p0, p1, p2; - p0 = comp->decompress.v42bis_parm_p0 | comp->compress.v42bis_parm_p0; - p1 = comp->decompress.v42bis_parm_n2; - p2 = comp->decompress.v42bis_parm_n7; - - DEBUGP(DSNDCP, "Resetting compression state: %p, p0=%d, p1=%d, p2=%d\n", - comp, p0, p1, p2); - - v42bis_init(NULL, comp, p0, p1, p2, &tx_v42bis_frame_handler, NULL, - V42BIS_MAX_OUTPUT_LENGTH, &rx_v42bis_data_handler, NULL, - V42BIS_MAX_OUTPUT_LENGTH); -} - -/* Compress a packet using V.42bis data compression */ -static int v42bis_compress_unitdata(uint8_t *pcomp_index, uint8_t *data, - unsigned int len, v42bis_state_t *comp) -{ - /* Note: This implementation may only be used to compress SN_UNITDATA - * packets, since it resets the compression state for each NPDU. */ - - uint8_t *data_o; - int rc; - int skip = 0; - struct v42bis_output_buffer compressed_data; - - /* Don't bother with short packets */ - if (len < MIN_COMPR_PAYLOAD) - skip = 1; - - /* Skip if compression is not enabled for TX direction */ - if (!comp->compress.v42bis_parm_p0) - skip = 1; - - /* Skip compression */ - if (skip) { - *pcomp_index = 0; - return len; - } - - /* Reset V.42bis compression state */ - v42bis_reset(comp); - - /* Run compressor */ - data_o = talloc_zero_size(comp, len * MAX_DATADECOMPR_FAC); - compressed_data.buf = data_o; - compressed_data.buf_pointer = data_o; - compressed_data.len = 0; - comp->compress.user_data = (&compressed_data); - rc = v42bis_compress(comp, data, len); - if (rc < 0) { - LOGP(DSNDCP, LOGL_ERROR, - "Data compression failed, skipping...\n"); - skip = 1; - } - rc = v42bis_compress_flush(comp); - if (rc < 0) { - LOGP(DSNDCP, LOGL_ERROR, - "Data compression failed, skipping...\n"); - skip = 1; - } - - /* The compressor might yield negative compression gain, in - * this case, we just decide to send the packat as normal, - * uncompressed payload => skip compresssion */ - if (compressed_data.len >= len) { - LOGP(DSNDCP, LOGL_ERROR, - "Data compression ineffective, skipping...\n"); - skip = 1; - } - - /* Skip compression */ - if (skip) { - *pcomp_index = 0; - talloc_free(data_o); - return len; - } - - *pcomp_index = 1; - memcpy(data, data_o, compressed_data.len); - talloc_free(data_o); - - return compressed_data.len; -} - -/* Expand a packet using V.42bis data compression */ -static int v42bis_expand_unitdata(uint8_t *data, unsigned int len, - uint8_t pcomp_index, v42bis_state_t *comp) -{ - /* Note: This implementation may only be used to compress SN_UNITDATA - * packets, since it resets the compression state for each NPDU. */ - - int rc; - struct v42bis_output_buffer uncompressed_data; - uint8_t *data_i; - - /* Skip when the packet is marked as uncompressed */ - if (pcomp_index == 0) { - return len; - } - - /* Reset V.42bis compression state */ - v42bis_reset(comp); - - /* Decompress packet */ - data_i = talloc_zero_size(comp, len); - memcpy(data_i, data, len); - uncompressed_data.buf = data; - uncompressed_data.buf_pointer = data; - uncompressed_data.len = 0; - comp->decompress.user_data = (&uncompressed_data); - rc = v42bis_decompress(comp, data_i, len); - talloc_free(data_i); - if (rc < 0) - return -EINVAL; - rc = v42bis_decompress_flush(comp); - if (rc < 0) - return -EINVAL; - - return uncompressed_data.len; -} - -/* Expand packet */ -int gprs_sndcp_dcomp_expand(uint8_t *data, unsigned int len, uint8_t pcomp, - const struct llist_head *comp_entities) -{ - int rc; - uint8_t pcomp_index = 0; - struct gprs_sndcp_comp *comp_entity; - - OSMO_ASSERT(data); - OSMO_ASSERT(comp_entities); - - LOGP(DSNDCP, LOGL_DEBUG, - "Data compression entity list: comp_entities=%p\n", comp_entities); - - LOGP(DSNDCP, LOGL_DEBUG, "Data compression mode: dcomp=%d\n", pcomp); - - /* Skip on pcomp=0 */ - if (pcomp == 0) { - return len; - } - - /* Find out which compression entity handles the data */ - comp_entity = gprs_sndcp_comp_by_comp(comp_entities, pcomp); - - /* Skip compression if no suitable compression entity can be found */ - if (!comp_entity) { - return len; - } - - /* Note: Only data compression entities may appear in - * data compression context */ - OSMO_ASSERT(comp_entity->compclass == SNDCP_XID_DATA_COMPRESSION); - - /* Note: Currently V42BIS is the only compression method we - * support, so the only allowed algorithm is V42BIS */ - OSMO_ASSERT(comp_entity->algo == V42BIS); - - /* Find pcomp_index */ - pcomp_index = gprs_sndcp_comp_get_idx(comp_entity, pcomp); - - /* Run decompression algo */ - rc = v42bis_expand_unitdata(data, len, pcomp_index, comp_entity->state); - - LOGP(DSNDCP, LOGL_DEBUG, - "Data expansion done, old length=%d, new length=%d, entity=%p\n", - len, rc, comp_entity); - - return rc; -} - -/* Compress packet */ -int gprs_sndcp_dcomp_compress(uint8_t *data, unsigned int len, uint8_t *pcomp, - const struct llist_head *comp_entities, - uint8_t nsapi) -{ - int rc; - uint8_t pcomp_index = 0; - struct gprs_sndcp_comp *comp_entity; - - OSMO_ASSERT(data); - OSMO_ASSERT(pcomp); - OSMO_ASSERT(comp_entities); - - LOGP(DSNDCP, LOGL_DEBUG, - "Data compression entity list: comp_entities=%p\n", comp_entities); - - /* Find out which compression entity handles the data */ - comp_entity = gprs_sndcp_comp_by_nsapi(comp_entities, nsapi); - - /* Skip compression if no suitable compression entity can be found */ - if (!comp_entity) { - *pcomp = 0; - return len; - } - - /* Note: Only data compression entities may appear in - * data compression context */ - OSMO_ASSERT(comp_entity->compclass == SNDCP_XID_DATA_COMPRESSION); - - /* Note: Currently V42BIS is the only compression method we - * support, so the only allowed algorithm is V42BIS */ - OSMO_ASSERT(comp_entity->algo == V42BIS); - - /* Run compression algo */ - rc = v42bis_compress_unitdata(&pcomp_index, data, len, - comp_entity->state); - - /* Find pcomp value */ - *pcomp = gprs_sndcp_comp_get_comp(comp_entity, pcomp_index); - - LOGP(DSNDCP, LOGL_DEBUG, "Data compression mode: dcomp=%d\n", *pcomp); - - LOGP(DSNDCP, LOGL_DEBUG, - "Data compression done, old length=%d, new length=%d, entity=%p\n", - len, rc, comp_entity); - - return rc; -} diff --git a/openbsc/src/gprs/gprs_sndcp_pcomp.c b/openbsc/src/gprs/gprs_sndcp_pcomp.c deleted file mode 100644 index a2236c3b1..000000000 --- a/openbsc/src/gprs/gprs_sndcp_pcomp.c +++ /dev/null @@ -1,282 +0,0 @@ -/* GPRS SNDCP header compression handler */ - -/* (C) 2016 by Sysmocom s.f.m.c. GmbH - * All Rights Reserved - * - * Author: Philipp Maier - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <stdio.h> -#include <string.h> -#include <stdint.h> -#include <math.h> -#include <errno.h> -#include <stdbool.h> - -#include <osmocom/core/utils.h> -#include <osmocom/core/msgb.h> -#include <osmocom/core/linuxlist.h> -#include <osmocom/core/talloc.h> -#include <osmocom/gsm/tlv.h> - -#include <openbsc/gprs_llc.h> -#include <openbsc/sgsn.h> -#include <openbsc/gprs_sndcp_xid.h> -#include <openbsc/slhc.h> -#include <openbsc/debug.h> -#include <openbsc/gprs_sndcp_comp.h> -#include <openbsc/gprs_sndcp_pcomp.h> - -/* Initalize header compression */ -int gprs_sndcp_pcomp_init(const void *ctx, struct gprs_sndcp_comp *comp_entity, - const struct gprs_sndcp_comp_field *comp_field) -{ - /* Note: This function is automatically called from - * gprs_sndcp_comp.c when a new header compression - * entity is created by gprs_sndcp.c */ - - OSMO_ASSERT(comp_entity); - OSMO_ASSERT(comp_field); - - if (comp_entity->compclass == SNDCP_XID_PROTOCOL_COMPRESSION - && comp_entity->algo == RFC_1144) { - OSMO_ASSERT(comp_field->rfc1144_params); - comp_entity->state = - slhc_init(ctx, comp_field->rfc1144_params->s01 + 1, - comp_field->rfc1144_params->s01 + 1); - LOGP(DSNDCP, LOGL_INFO, - "RFC1144 header compression initalized.\n"); - return 0; - } - - /* Just in case someone tries to initalize an unknown or unsupported - * header compresson. Since everything is checked during the SNDCP - * negotiation process, this should never happen! */ - OSMO_ASSERT(false); -} - -/* Terminate header compression */ -void gprs_sndcp_pcomp_term(struct gprs_sndcp_comp *comp_entity) -{ - /* Note: This function is automatically called from - * gprs_sndcp_comp.c when a header compression - * entity is deleted by gprs_sndcp.c */ - - OSMO_ASSERT(comp_entity); - - if (comp_entity->compclass == SNDCP_XID_PROTOCOL_COMPRESSION - && comp_entity->algo == RFC_1144) { - if (comp_entity->state) { - slhc_free((struct slcompress *)comp_entity->state); - comp_entity->state = NULL; - } - LOGP(DSNDCP, LOGL_INFO, - "RFC1144 header compression terminated.\n"); - return; - } - - /* Just in case someone tries to terminate an unknown or unsupported - * data compresson. Since everything is checked during the SNDCP - * negotiation process, this should never happen! */ - OSMO_ASSERT(false); -} - -/* Compress a packet using Van Jacobson RFC1144 header compression */ -static int rfc1144_compress(uint8_t *pcomp_index, uint8_t *data, - unsigned int len, struct slcompress *comp) -{ - uint8_t *comp_ptr; - int compr_len; - uint8_t *data_o; - - /* Create a working copy of the incoming data */ - data_o = talloc_zero_size(comp, len); - memcpy(data_o, data, len); - - /* Run compressor */ - compr_len = slhc_compress(comp, data, len, data_o, &comp_ptr, 0); - - /* Generate pcomp_index */ - if (data_o[0] & SL_TYPE_COMPRESSED_TCP) { - *pcomp_index = 2; - data_o[0] &= ~SL_TYPE_COMPRESSED_TCP; - memcpy(data, data_o, compr_len); - } else if ((data_o[0] & SL_TYPE_UNCOMPRESSED_TCP) == - SL_TYPE_UNCOMPRESSED_TCP) { - *pcomp_index = 1; - data_o[0] &= 0x4F; - memcpy(data, data_o, compr_len); - } else - *pcomp_index = 0; - - talloc_free(data_o); - return compr_len; -} - -/* Expand a packet using Van Jacobson RFC1144 header compression */ -static int rfc1144_expand(uint8_t *data, unsigned int len, uint8_t pcomp_index, - struct slcompress *comp) -{ - int data_decompressed_len; - int type; - - /* Note: this function should never be called with pcomp_index=0, - * since this condition is already filtered - * out by gprs_sndcp_pcomp_expand() */ - - /* Determine the data type by the PCOMP index */ - switch (pcomp_index) { - case 0: - type = SL_TYPE_IP; - break; - case 1: - type = SL_TYPE_UNCOMPRESSED_TCP; - break; - case 2: - type = SL_TYPE_COMPRESSED_TCP; - break; - default: - LOGP(DSNDCP, LOGL_ERROR, - "rfc1144_expand() Invalid pcomp_index value (%d) detected, assuming no compression!\n", - pcomp_index); - type = SL_TYPE_IP; - break; - } - - /* Restore the original version nibble on - * marked uncompressed packets */ - if (type == SL_TYPE_UNCOMPRESSED_TCP) { - /* Just in case the phone tags uncompressed tcp-data - * (normally this is handled by pcomp so there is - * no need for tagging the data) */ - data[0] &= 0x4F; - data_decompressed_len = slhc_remember(comp, data, len); - return data_decompressed_len; - } - - /* Uncompress compressed packets */ - else if (type == SL_TYPE_COMPRESSED_TCP) { - data_decompressed_len = slhc_uncompress(comp, data, len); - return data_decompressed_len; - } - - /* Regular or unknown packets will not be touched */ - return len; -} - -/* Expand packet header */ -int gprs_sndcp_pcomp_expand(uint8_t *data, unsigned int len, uint8_t pcomp, - const struct llist_head *comp_entities) -{ - int rc; - uint8_t pcomp_index = 0; - struct gprs_sndcp_comp *comp_entity; - - OSMO_ASSERT(data); - OSMO_ASSERT(comp_entities); - - LOGP(DSNDCP, LOGL_DEBUG, - "Header compression entity list: comp_entities=%p\n", - comp_entities); - - LOGP(DSNDCP, LOGL_DEBUG, "Header compression mode: pcomp=%d\n", pcomp); - - /* Skip on pcomp=0 */ - if (pcomp == 0) { - return len; - } - - /* Find out which compression entity handles the data */ - comp_entity = gprs_sndcp_comp_by_comp(comp_entities, pcomp); - - /* Skip compression if no suitable compression entity can be found */ - if (!comp_entity) { - return len; - } - - /* Note: Only protocol compression entities may appear in - * protocol compression context */ - OSMO_ASSERT(comp_entity->compclass == SNDCP_XID_PROTOCOL_COMPRESSION); - - /* Note: Currently RFC1144 is the only compression method we - * support, so the only allowed algorithm is RFC1144 */ - OSMO_ASSERT(comp_entity->algo == RFC_1144); - - /* Find pcomp_index */ - pcomp_index = gprs_sndcp_comp_get_idx(comp_entity, pcomp); - - /* Run decompression algo */ - rc = rfc1144_expand(data, len, pcomp_index, comp_entity->state); - slhc_i_status(comp_entity->state); - slhc_o_status(comp_entity->state); - - LOGP(DSNDCP, LOGL_DEBUG, - "Header expansion done, old length=%d, new length=%d, entity=%p\n", - len, rc, comp_entity); - - return rc; -} - -/* Compress packet header */ -int gprs_sndcp_pcomp_compress(uint8_t *data, unsigned int len, uint8_t *pcomp, - const struct llist_head *comp_entities, - uint8_t nsapi) -{ - int rc; - uint8_t pcomp_index = 0; - struct gprs_sndcp_comp *comp_entity; - - OSMO_ASSERT(data); - OSMO_ASSERT(pcomp); - OSMO_ASSERT(comp_entities); - - LOGP(DSNDCP, LOGL_DEBUG, - "Header compression entity list: comp_entities=%p\n", - comp_entities); - - /* Find out which compression entity handles the data */ - comp_entity = gprs_sndcp_comp_by_nsapi(comp_entities, nsapi); - - /* Skip compression if no suitable compression entity can be found */ - if (!comp_entity) { - *pcomp = 0; - return len; - } - - /* Note: Only protocol compression entities may appear in - * protocol compression context */ - OSMO_ASSERT(comp_entity->compclass == SNDCP_XID_PROTOCOL_COMPRESSION); - - /* Note: Currently RFC1144 is the only compression method we - * support, so the only allowed algorithm is RFC1144 */ - OSMO_ASSERT(comp_entity->algo == RFC_1144); - - /* Run compression algo */ - rc = rfc1144_compress(&pcomp_index, data, len, comp_entity->state); - slhc_i_status(comp_entity->state); - slhc_o_status(comp_entity->state); - - /* Find pcomp value */ - *pcomp = gprs_sndcp_comp_get_comp(comp_entity, pcomp_index); - - LOGP(DSNDCP, LOGL_DEBUG, "Header compression mode: pcomp=%d\n", *pcomp); - - LOGP(DSNDCP, LOGL_DEBUG, - "Header compression done, old length=%d, new length=%d, entity=%p\n", - len, rc, comp_entity); - return rc; -} diff --git a/openbsc/src/gprs/gprs_sndcp_vty.c b/openbsc/src/gprs/gprs_sndcp_vty.c deleted file mode 100644 index 430881fc8..000000000 --- a/openbsc/src/gprs/gprs_sndcp_vty.c +++ /dev/null @@ -1,71 +0,0 @@ -/* VTY interface for our GPRS SNDCP implementation */ - -/* (C) 2010 by Harald Welte <laforge@gnumonks.org> - * - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <stdlib.h> -#include <unistd.h> -#include <errno.h> -#include <stdint.h> - -#include <arpa/inet.h> - -#include <openbsc/gsm_data.h> -#include <osmocom/core/msgb.h> -#include <osmocom/gsm/tlv.h> -#include <osmocom/core/talloc.h> -#include <osmocom/core/select.h> -#include <osmocom/core/rate_ctr.h> -#include <openbsc/debug.h> -#include <openbsc/signal.h> -#include <openbsc/gprs_llc.h> -#include <openbsc/gprs_sndcp.h> - -#include <osmocom/vty/vty.h> -#include <osmocom/vty/command.h> - -static void vty_dump_sne(struct vty *vty, struct gprs_sndcp_entity *sne) -{ - vty_out(vty, " TLLI %08x SAPI=%u NSAPI=%u:%s", - sne->lle->llme->tlli, sne->lle->sapi, sne->nsapi, VTY_NEWLINE); - vty_out(vty, " Defrag: npdu=%u highest_seg=%u seg_have=0x%08x tot_len=%u%s", - sne->defrag.npdu, sne->defrag.highest_seg, sne->defrag.seg_have, - sne->defrag.tot_len, VTY_NEWLINE); -} - - -DEFUN(show_sndcp, show_sndcp_cmd, - "show sndcp", - SHOW_STR "Display information about the SNDCP protocol") -{ - struct gprs_sndcp_entity *sne; - - vty_out(vty, "State of SNDCP Entities%s", VTY_NEWLINE); - llist_for_each_entry(sne, &gprs_sndcp_entities, list) - vty_dump_sne(vty, sne); - - return CMD_SUCCESS; -} - -int gprs_sndcp_vty_init(void) -{ - install_element_ve(&show_sndcp_cmd); - - return 0; -} diff --git a/openbsc/src/gprs/gprs_sndcp_xid.c b/openbsc/src/gprs/gprs_sndcp_xid.c deleted file mode 100644 index dfea5febc..000000000 --- a/openbsc/src/gprs/gprs_sndcp_xid.c +++ /dev/null @@ -1,1822 +0,0 @@ -/* GPRS SNDCP XID field encoding/decoding as per 3GPP TS 44.065 */ - -/* (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> - * All Rights Reserved - * - * Author: Philipp Maier - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <stdio.h> -#include <string.h> -#include <stdint.h> -#include <math.h> -#include <errno.h> - -#include <osmocom/core/utils.h> -#include <osmocom/core/msgb.h> -#include <osmocom/core/linuxlist.h> -#include <osmocom/core/talloc.h> -#include <osmocom/gsm/tlv.h> - -#include <openbsc/debug.h> -#include <openbsc/gprs_llc.h> -#include <openbsc/sgsn.h> -#include <openbsc/gprs_sndcp_xid.h> - -/* When the propose bit in an SNDCP-XID compression field is set to zero, - * the algorithm identifier is stripped. The algoritm parameters are specific - * for each algorithms. The following struct is used to pass the information - * about the referenced algorithm to the parser. */ -struct entity_algo_table { - unsigned int entity; /* see also: 6.5.1.1.3 and 6.6.1.1.3 */ - unsigned int algo; /* see also: 6.5.1.1.4 and 6.6.1.1.4 */ - unsigned int compclass; /* Can be either SNDCP_XID_DATA_COMPRESSION or - SNDCP_XID_PROTOCOL_COMPRESSION */ -}; - -/* FUNCTIONS RELATED TO SNDCP-XID ENCODING */ - -/* Encode applicable sapis (works the same in all three compression schemes) */ -static int encode_pcomp_applicable_sapis(uint8_t *dst, - const uint8_t *nsapis, - uint8_t nsapis_len) -{ - /* NOTE: Buffer *dst needs offer at 2 bytes - * of space to store the generation results */ - - uint16_t blob; - uint8_t nsapi; - int i; - - /* Bail if number of possible nsapis exceeds valid range - * (Only 11 nsapis possible for PDP-Contexts) */ - OSMO_ASSERT(nsapis_len <= 11); - - /* Encode applicable SAPIs */ - blob = 0; - for (i = 0; i < nsapis_len; i++) { - nsapi = nsapis[i]; - /* Only NSAPI 5 to 15 are applicable for user traffic (PDP- - * contexts). Only for these NSAPIs SNDCP-XID parameters - * can apply. See also 3GPP TS 44.065, 5.1 Service primitives */ - OSMO_ASSERT(nsapi >= 5 && nsapi <= 15); - blob |= (1 << nsapi); - } - - /* Store result */ - *dst = (blob >> 8) & 0xFF; - dst++; - *dst = blob & 0xFF; - - return 2; -} - -/* Encode rfc1144 parameter field - * (see also: 3GPP TS 44.065, 6.5.2.1, Table 5) */ -static int encode_pcomp_rfc1144_params(uint8_t *dst, unsigned int dst_maxlen, - const struct - gprs_sndcp_pcomp_rfc1144_params *params) -{ - /* NOTE: Buffer *dst should offer at least 3 bytes - * of space to store the generation results */ - - int dst_counter = 0; - int rc; - - OSMO_ASSERT(dst_maxlen >= 3); - - /* Zero out buffer */ - memset(dst, 0, dst_maxlen); - - /* Encode applicable SAPIs */ - rc = encode_pcomp_applicable_sapis(dst, params->nsapi, - params->nsapi_len); - dst += rc; - dst_counter += rc; - - /* Encode s01 (see also: 3GPP TS 44.065, 6.5.2.1, Table 5) */ - OSMO_ASSERT(params->s01 >= 0); - OSMO_ASSERT(params->s01 <= 255); - *dst = params->s01; - dst++; - dst_counter++; - - /* Return generated length */ - return dst_counter; -} - -/* - * Encode rfc2507 parameter field - * (see also: 3GPP TS 44.065, 6.5.3.1, Table 6) - */ -static int encode_pcomp_rfc2507_params(uint8_t *dst, unsigned int dst_maxlen, - const struct - gprs_sndcp_pcomp_rfc2507_params *params) -{ - /* NOTE: Buffer *dst should offer at least 3 bytes - * of space to store the generation results */ - - int dst_counter = 0; - int rc; - - OSMO_ASSERT(dst_maxlen >= 9); - - /* Zero out buffer */ - memset(dst, 0, dst_maxlen); - - /* Encode applicable SAPIs */ - rc = encode_pcomp_applicable_sapis(dst, params->nsapi, - params->nsapi_len); - dst += rc; - dst_counter += rc; - - /* Encode F_MAX_PERIOD (see also: 3GPP TS 44.065, 6.5.3.1, Table 6) */ - OSMO_ASSERT(params->f_max_period >= 1); - OSMO_ASSERT(params->f_max_period <= 65535); - *dst = (params->f_max_period >> 8) & 0xFF; - dst++; - dst_counter++; - *dst = (params->f_max_period) & 0xFF; - dst++; - dst_counter++; - - /* Encode F_MAX_TIME (see also: 3GPP TS 44.065, 6.5.3.1, Table 6) */ - OSMO_ASSERT(params->f_max_time >= 1); - OSMO_ASSERT(params->f_max_time <= 255); - *dst = params->f_max_time; - dst++; - dst_counter++; - - /* Encode MAX_HEADER (see also: 3GPP TS 44.065, 6.5.3.1, Table 6) */ - OSMO_ASSERT(params->max_header >= 60); - OSMO_ASSERT(params->max_header <= 255); - *dst = params->max_header; - dst++; - dst_counter++; - - /* Encode TCP_SPACE (see also: 3GPP TS 44.065, 6.5.3.1, Table 6) */ - OSMO_ASSERT(params->tcp_space >= 3); - OSMO_ASSERT(params->tcp_space <= 255); - *dst = params->tcp_space; - dst++; - dst_counter++; - - /* Encode NON_TCP_SPACE (see also: 3GPP TS 44.065, 6.5.3.1, Table 6) */ - OSMO_ASSERT(params->non_tcp_space >= 3); - OSMO_ASSERT(params->non_tcp_space <= 65535); - *dst = (params->non_tcp_space >> 8) & 0xFF; - dst++; - dst_counter++; - *dst = (params->non_tcp_space) & 0xFF; - dst++; - dst_counter++; - - /* Return generated length */ - return dst_counter; -} - -/* Encode ROHC parameter field - * (see also: 3GPP TS 44.065, 6.5.4.1, Table 10) */ -static int encode_pcomp_rohc_params(uint8_t *dst, unsigned int dst_maxlen, - const struct gprs_sndcp_pcomp_rohc_params - *params) -{ - /* NOTE: Buffer *dst should offer at least 36 - * (2 * 16 Profiles + 2 * 3 Parameter) bytes - * of memory space to store generation results */ - - int i; - int dst_counter = 0; - int rc; - - OSMO_ASSERT(dst_maxlen >= 38); - - /* Bail if number of ROHC profiles exceeds limit - * (ROHC supports only a maximum of 16 different profiles) */ - OSMO_ASSERT(params->profile_len <= 16); - - /* Zero out buffer */ - memset(dst, 0, dst_maxlen); - - /* Encode applicable SAPIs */ - rc = encode_pcomp_applicable_sapis(dst, params->nsapi, - params->nsapi_len); - dst += rc; - dst_counter += rc; - - /* Encode MAX_CID (see also: 3GPP TS 44.065, 6.5.4.1, Table 10) */ - OSMO_ASSERT(params->max_cid >= 0); - OSMO_ASSERT(params->max_cid <= 16383); - *dst = (params->max_cid >> 8) & 0xFF; - dst++; - *dst = params->max_cid & 0xFF; - dst++; - dst_counter += 2; - - /* Encode MAX_HEADER (see also: 3GPP TS 44.065, 6.5.4.1, Table 10) */ - OSMO_ASSERT(params->max_header >= 60); - OSMO_ASSERT(params->max_header <= 255); - *dst = (params->max_header >> 8) & 0xFF; - dst++; - *dst = params->max_header & 0xFF; - dst++; - dst_counter += 2; - - /* Encode ROHC Profiles (see also: 3GPP TS 44.065, 6.5.4.1, Table 10) */ - for (i = 0; i < params->profile_len; i++) { - *dst = (params->profile[i] >> 8) & 0xFF; - dst++; - *dst = params->profile[i] & 0xFF; - dst++; - dst_counter += 2; - } - - /* Return generated length */ - return dst_counter; -} - -/* Encode V.42bis parameter field - * (see also: 3GPP TS 44.065, 6.6.2.1, Table 7a) */ -static int encode_dcomp_v42bis_params(uint8_t *dst, unsigned int dst_maxlen, - const struct - gprs_sndcp_dcomp_v42bis_params *params) -{ - /* NOTE: Buffer *dst should offer at least 6 bytes - * of space to store the generation results */ - - int dst_counter = 0; - int rc; - - OSMO_ASSERT(dst_maxlen >= 6); - - /* Zero out buffer */ - memset(dst, 0, dst_maxlen); - - /* Encode applicable SAPIs */ - rc = encode_pcomp_applicable_sapis(dst, params->nsapi, - params->nsapi_len); - dst += rc; - dst_counter += rc; - - /* Encode P0 (see also: 3GPP TS 44.065, 6.6.2.1, Table 7a) */ - OSMO_ASSERT(params->p0 >= 0); - OSMO_ASSERT(params->p0 <= 3); - *dst = params->p0 & 0x03; - dst++; - dst_counter++; - - /* Encode P1 (see also: 3GPP TS 44.065, 6.6.2.1, Table 7a) */ - OSMO_ASSERT(params->p1 >= 512); - OSMO_ASSERT(params->p1 <= 65535); - *dst = (params->p1 >> 8) & 0xFF; - dst++; - *dst = params->p1 & 0xFF; - dst++; - dst_counter += 2; - - /* Encode P2 (see also: 3GPP TS 44.065, 6.6.2.1, Table 7a) */ - OSMO_ASSERT(params->p2 >= 6); - OSMO_ASSERT(params->p2 <= 250); - *dst = params->p2; - dst++; - dst_counter++; - - /* Return generated length */ - return dst_counter; -} - -/* Encode V44 parameter field - * (see also: 3GPP TS 44.065, 6.6.3.1, Table 7c) */ -static int encode_dcomp_v44_params(uint8_t *dst, unsigned int dst_maxlen, - const struct gprs_sndcp_dcomp_v44_params - *params) -{ - /* NOTE: Buffer *dst should offer at least 12 bytes - * of space to store the generation results */ - - int dst_counter = 0; - int rc; - - OSMO_ASSERT(dst_maxlen >= 12); - - /* Zero out buffer */ - memset(dst, 0, dst_maxlen); - - /* Encode applicable SAPIs */ - rc = encode_pcomp_applicable_sapis(dst, params->nsapi, - params->nsapi_len); - dst += rc; - dst_counter += rc; - - /* Encode C0 (see also: 3GPP TS 44.065, 6.6.3.1, Table 7c) */ - OSMO_ASSERT(params->c0 == 0x80 || params->c0 == 0xC0); - *dst = params->c0 & 0xC0; - dst++; - dst_counter++; - - /* Encode P0 (see also: 3GPP TS 44.065, 6.6.3.1, Table 7c) */ - OSMO_ASSERT(params->p0 >= 0); - OSMO_ASSERT(params->p0 <= 3); - *dst = params->p0 & 0x03; - dst++; - dst_counter++; - - /* Encode P1T (see also: 3GPP TS 44.065, 6.6.3.1, Table 7c) */ - OSMO_ASSERT(params->p1t >= 256); - OSMO_ASSERT(params->p1t <= 65535); - *dst = (params->p1t >> 8) & 0xFF; - dst++; - *dst = params->p1t & 0xFF; - dst++; - dst_counter += 2; - - /* Encode P1R (see also: 3GPP TS 44.065, 6.6.3.1, Table 7c) */ - OSMO_ASSERT(params->p1r >= 256); - OSMO_ASSERT(params->p1r <= 65535); - *dst = (params->p1r >> 8) & 0xFF; - dst++; - *dst = params->p1r & 0xFF; - dst++; - dst_counter += 2; - - /* Encode P3T (see also: 3GPP TS 44.065, 6.6.3.1, Table 7c) */ - OSMO_ASSERT(params->p3t >= 0); - OSMO_ASSERT(params->p3t <= 65535); - OSMO_ASSERT(params->p3t >= 2 * params->p1t); - *dst = (params->p3t >> 8) & 0xFF; - dst++; - *dst = params->p3t & 0xFF; - dst++; - dst_counter += 2; - - /* Encode P3R (see also: 3GPP TS 44.065, 6.6.3.1, Table 7c) */ - OSMO_ASSERT(params->p3r >= 0); - OSMO_ASSERT(params->p3r <= 65535); - OSMO_ASSERT(params->p3r >= 2 * params->p1r); - *dst = (params->p3r >> 8) & 0xFF; - dst++; - *dst = params->p3r & 0xFF; - dst++; - dst_counter += 2; - - /* Return generated length */ - return dst_counter; -} - -/* Encode data or protocol control information compression field - * (see also: 3GPP TS 44.065, 6.6.1.1, Figure 9 and - * 3GPP TS 44.065, 6.5.1.1, Figure 7) */ -static int encode_comp_field(uint8_t *dst, unsigned int dst_maxlen, - const struct gprs_sndcp_comp_field *comp_field) -{ - int dst_counter = 0; - int len; - int expected_length; - int i; - - uint8_t payload_bytes[256]; - int payload_bytes_len = -1; - - /* If possible, try do encode payload bytes first */ - if (comp_field->rfc1144_params) { - payload_bytes_len = - encode_pcomp_rfc1144_params(payload_bytes, - sizeof(payload_bytes), - comp_field->rfc1144_params); - } else if (comp_field->rfc2507_params) { - payload_bytes_len = - encode_pcomp_rfc2507_params(payload_bytes, - sizeof(payload_bytes), - comp_field->rfc2507_params); - } else if (comp_field->rohc_params) { - payload_bytes_len = - encode_pcomp_rohc_params(payload_bytes, - sizeof(payload_bytes), - comp_field->rohc_params); - } else if (comp_field->v42bis_params) { - payload_bytes_len = - encode_dcomp_v42bis_params(payload_bytes, - sizeof(payload_bytes), - comp_field->v42bis_params); - } else if (comp_field->v44_params) { - payload_bytes_len = - encode_dcomp_v44_params(payload_bytes, - sizeof(payload_bytes), - comp_field->v44_params); - } else - OSMO_ASSERT(false); - - /* Bail immediately if payload byte generation failed */ - OSMO_ASSERT(payload_bytes_len >= 0); - - /* Bail if comp_len is out of bounds */ - OSMO_ASSERT(comp_field->comp_len <= sizeof(comp_field->comp)); - - /* Calculate length field of the data block */ - if (comp_field->p) { - len = - payload_bytes_len + - ceil((double)(comp_field->comp_len) / 2.0); - expected_length = len + 3; - } else { - len = payload_bytes_len; - expected_length = len + 2; - } - - /* Bail immediately if no sufficient memory space is supplied */ - OSMO_ASSERT(dst_maxlen >= expected_length); - - /* Check if the entity number is within bounds */ - OSMO_ASSERT(comp_field->entity <= 0x1f); - - /* Check if the algorithm number is within bounds */ - OSMO_ASSERT(comp_field->algo >= 0 || comp_field->algo <= 0x1f); - - /* Zero out buffer */ - memset(dst, 0, dst_maxlen); - - /* Encode Propose bit */ - if (comp_field->p) - *dst |= (1 << 7); - - /* Encode entity number */ - *dst |= comp_field->entity & 0x1F; - dst++; - dst_counter++; - - /* Encode algorithm number */ - if (comp_field->p) { - *dst |= comp_field->algo & 0x1F; - dst++; - dst_counter++; - } - - /* Encode length field */ - *dst |= len & 0xFF; - dst++; - dst_counter++; - - /* Encode PCOMP/DCOMP values */ - if (comp_field->p) { - for (i = 0; i < comp_field->comp_len; i++) { - /* Check if submitted PCOMP/DCOMP - values are within bounds */ - if (comp_field->comp[i] > 0x0F) - return -EINVAL; - - if (i & 1) { - *dst |= comp_field->comp[i] & 0x0F; - dst++; - dst_counter++; - } else - *dst |= (comp_field->comp[i] << 4) & 0xF0; - } - - if (i & 1) { - dst++; - dst_counter++; - } - } - - /* Append payload bytes */ - memcpy(dst, payload_bytes, payload_bytes_len); - dst_counter += payload_bytes_len; - - /* Return generated length */ - return dst_counter; -} - -/* Find out to which compression class the specified comp-field belongs - * (header compression or data compression?) */ -int gprs_sndcp_get_compression_class(const struct gprs_sndcp_comp_field - *comp_field) -{ - OSMO_ASSERT(comp_field); - - if (comp_field->rfc1144_params) - return SNDCP_XID_PROTOCOL_COMPRESSION; - else if (comp_field->rfc2507_params) - return SNDCP_XID_PROTOCOL_COMPRESSION; - else if (comp_field->rohc_params) - return SNDCP_XID_PROTOCOL_COMPRESSION; - else if (comp_field->v42bis_params) - return SNDCP_XID_DATA_COMPRESSION; - else if (comp_field->v44_params) - return SNDCP_XID_DATA_COMPRESSION; - else - return -EINVAL; -} - -/* Convert all compression fields to bytstreams */ -static int gprs_sndcp_pack_fields(const struct llist_head *comp_fields, - uint8_t *dst, - unsigned int dst_maxlen, int class) -{ - struct gprs_sndcp_comp_field *comp_field; - int byte_counter = 0; - int rc; - - llist_for_each_entry_reverse(comp_field, comp_fields, list) { - if (class == gprs_sndcp_get_compression_class(comp_field)) { - rc = encode_comp_field(dst + byte_counter, - dst_maxlen - byte_counter, - comp_field); - - /* When input data is correct, there is - * no reason for the encoder to fail! */ - OSMO_ASSERT(rc >= 0); - - byte_counter += rc; - } - } - - /* Return generated length */ - return byte_counter; -} - -/* Transform a list with compression fields into an SNDCP-XID message (dst) */ -int gprs_sndcp_compile_xid(uint8_t *dst, unsigned int dst_maxlen, - const struct llist_head *comp_fields, int version) -{ - int rc; - int byte_counter = 0; - uint8_t comp_bytes[512]; - uint8_t xid_version_number[1]; - - OSMO_ASSERT(comp_fields); - OSMO_ASSERT(dst); - OSMO_ASSERT(dst_maxlen >= 2 + sizeof(xid_version_number)); - - /* Prepend header with version number */ - if (version >= 0) { - xid_version_number[0] = (uint8_t) (version & 0xff); - dst = - tlv_put(dst, SNDCP_XID_VERSION_NUMBER, - sizeof(xid_version_number), xid_version_number); - byte_counter += (sizeof(xid_version_number) + 2); - } - - /* Stop if there is no compression fields supplied */ - if (llist_empty(comp_fields)) - return byte_counter; - - /* Add data compression fields */ - rc = gprs_sndcp_pack_fields(comp_fields, comp_bytes, - sizeof(comp_bytes), - SNDCP_XID_DATA_COMPRESSION); - OSMO_ASSERT(rc >= 0); - - if (rc > 0) { - dst = tlv_put(dst, SNDCP_XID_DATA_COMPRESSION, rc, comp_bytes); - byte_counter += rc + 2; - } - - /* Add header compression fields */ - rc = gprs_sndcp_pack_fields(comp_fields, comp_bytes, - sizeof(comp_bytes), - SNDCP_XID_PROTOCOL_COMPRESSION); - OSMO_ASSERT(rc >= 0); - - if (rc > 0) { - dst = tlv_put(dst, SNDCP_XID_PROTOCOL_COMPRESSION, rc, - comp_bytes); - byte_counter += rc + 2; - } - - /* Return generated length */ - return byte_counter; -} - -/* FUNCTIONS RELATED TO SNDCP-XID DECODING */ - -/* Decode applicable sapis (works the same in all three compression schemes) */ -static int decode_pcomp_applicable_sapis(uint8_t *nsapis, - uint8_t *nsapis_len, - const uint8_t *src, - unsigned int src_len) -{ - uint16_t blob; - int i; - int nsapi_len = 0; - - /* Exit immediately if no result can be stored */ - if (!nsapis) - return -EINVAL; - - /* Exit immediately if not enough input data is available */ - if (src_len < 2) - return -EINVAL; - - /* Read bitmask */ - blob = *src; - blob = (blob << 8) & 0xFF00; - src++; - blob |= (*src) & 0xFF; - blob = (blob >> 5); - - /* Decode applicable SAPIs */ - for (i = 0; i < 15; i++) { - if ((blob >> i) & 1) { - nsapis[nsapi_len] = i + 5; - nsapi_len++; - } - } - - /* Return consumed length */ - *nsapis_len = nsapi_len; - return 2; -} - -/* Decode 16 bit field */ -static int decode_pcomp_16_bit_field(int *value_int, uint16_t * value_uint16, - const uint8_t *src, - unsigned int src_len, - int value_min, int value_max) -{ - uint16_t blob; - - /* Reset values to zero (just to be sure) */ - if (value_int) - *value_int = -1; - if (value_uint16) - *value_uint16 = 0; - - /* Exit if not enough src are available */ - if (src_len < 2) - return -EINVAL; - - /* Decode bit value */ - blob = *src; - blob = (blob << 8) & 0xFF00; - src++; - blob |= *src; - - /* Check if parsed value is within bounds */ - if (blob < value_min) - return -EINVAL; - if (blob > value_max) - return -EINVAL; - - /* Hand back results to the caller */ - if (value_int) - *value_int = blob; - if (value_uint16) - *value_uint16 = blob; - - /* Return consumed length */ - return 2; -} - -/* Decode 8 bit field */ -static int decode_pcomp_8_bit_field(int *value_int, uint8_t *value_uint8, - const uint8_t *src, - unsigned int src_len, - int value_min, int value_max) -{ - uint8_t blob; - - /* Reset values to invalid (just to be sure) */ - if (value_int) - *value_int = -1; - if (value_uint8) - *value_uint8 = 0; - - /* Exit if not enough src are available */ - if (src_len < 1) - return -EINVAL; - - /* Decode bit value */ - blob = *src; - - /* Check if parsed value is within bounds */ - if (blob < value_min) - return -EINVAL; - if (blob > value_max) - return -EINVAL; - - /* Hand back results to the caller */ - if (value_int) - *value_int = blob; - if (value_uint8) - *value_uint8 = blob; - - /* Return consumed length */ - return 1; -} - -/* Decode rfc1144 parameter field see also: 3GPP TS 44.065, 6.5.2.1, Table 5) */ -static int decode_pcomp_rfc1144_params(struct gprs_sndcp_pcomp_rfc1144_params - *params, const uint8_t *src, - unsigned int src_len) -{ - int rc; - int byte_counter = 0; - - /* Mark all optional parameters invalid by default */ - params->s01 = -1; - - /* Decode applicable SAPIs */ - rc = decode_pcomp_applicable_sapis(params->nsapi, ¶ms->nsapi_len, - src, src_len); - if (rc > 0) { - byte_counter += rc; - src += rc; - } else - return byte_counter; - - /* Decode parameter S0 -1 - * (see also: 3GPP TS 44.065, 6.5.2.1, Table 5) */ - rc = decode_pcomp_8_bit_field(¶ms->s01, NULL, src, - src_len - byte_counter, 0, 255); - if (rc <= 0) - return byte_counter; - byte_counter += rc; - src += rc; - - /* Return consumed length */ - return byte_counter; -} - -/* Decode rfc2507 parameter field - * (see also: 3GPP TS 44.065, 6.5.3.1, Table 6) */ -static int decode_pcomp_rfc2507_params(struct gprs_sndcp_pcomp_rfc2507_params - *params, const uint8_t *src, - unsigned int src_len) -{ - int rc; - int byte_counter = 0; - - /* Mark all optional parameters invalid by default */ - params->f_max_period = -1; - params->f_max_time = -1; - params->max_header = -1; - params->tcp_space = -1; - params->non_tcp_space = -1; - - /* Decode applicable SAPIs */ - rc = decode_pcomp_applicable_sapis(params->nsapi, ¶ms->nsapi_len, - src, src_len); - if (rc > 0) { - byte_counter += rc; - src += rc; - } else - return byte_counter; - - /* Decode F_MAX_PERIOD (see also: 3GPP TS 44.065, 6.5.3.1, Table 6) */ - rc = decode_pcomp_16_bit_field(¶ms->f_max_period, NULL, src, - src_len - byte_counter, 1, 65535); - if (rc <= 0) - return byte_counter; - byte_counter += rc; - src += rc; - - /* Decode F_MAX_TIME (see also: 3GPP TS 44.065, 6.5.3.1, Table 6) */ - rc = decode_pcomp_8_bit_field(¶ms->f_max_time, NULL, src, - src_len - byte_counter, 1, 255); - if (rc <= 0) - return byte_counter; - byte_counter += rc; - src += rc; - - /* Decode MAX_HEADER (see also: 3GPP TS 44.065, 6.5.3.1, Table 6) */ - rc = decode_pcomp_8_bit_field(¶ms->max_header, NULL, src, - src_len - byte_counter, 60, 255); - if (rc <= 0) - return byte_counter; - byte_counter += rc; - src += rc; - - /* Decode TCP_SPACE (see also: 3GPP TS 44.065, 6.5.3.1, Table 6) */ - rc = decode_pcomp_8_bit_field(¶ms->tcp_space, NULL, src, - src_len - byte_counter, 3, 255); - if (rc <= 0) - return byte_counter; - byte_counter += rc; - src += rc; - - /* Decode NON_TCP_SPACE (see also: 3GPP TS 44.065, 6.5.3.1, Table 6) */ - rc = decode_pcomp_16_bit_field(¶ms->non_tcp_space, NULL, src, - src_len - byte_counter, 3, 65535); - if (rc <= 0) - return byte_counter; - byte_counter += rc; - src += rc; - - /* Return consumed length */ - return byte_counter; -} - -/* Decode ROHC parameter field (see also: 3GPP TS 44.065, 6.5.4.1, Table 10) */ -static int decode_pcomp_rohc_params(struct gprs_sndcp_pcomp_rohc_params *params, - const uint8_t *src, unsigned int src_len) -{ - int rc; - int byte_counter = 0; - int i; - - /* Mark all optional parameters invalid by default */ - params->max_cid = -1; - params->max_header = -1; - - /* Decode applicable SAPIs */ - rc = decode_pcomp_applicable_sapis(params->nsapi, ¶ms->nsapi_len, - src, src_len); - if (rc <= 0) - return byte_counter; - byte_counter += rc; - src += rc; - - /* Decode MAX_CID (see also: 3GPP TS 44.065, 6.5.4.1, Table 10) */ - rc = decode_pcomp_16_bit_field(¶ms->max_cid, NULL, src, - src_len - byte_counter, 0, 16383); - if (rc <= 0) - return byte_counter; - byte_counter += rc; - src += rc; - - /* Decode MAX_HEADER (see also: 3GPP TS 44.065, 6.5.4.1, Table 10) */ - rc = decode_pcomp_16_bit_field(¶ms->max_header, NULL, src, - src_len - byte_counter, 60, 255); - if (rc <= 0) - return byte_counter; - byte_counter += rc; - src += rc; - - /* Decode Profiles (see also: 3GPP TS 44.065, 6.5.4.1, Table 10) */ - for (i = 0; i < 16; i++) { - params->profile_len = 0; - rc = decode_pcomp_16_bit_field(NULL, ¶ms->profile[i], src, - src_len - byte_counter, 0, - 65535); - if (rc <= 0) - return byte_counter; - byte_counter += rc; - src += rc; - params->profile_len = i + 1; - } - - /* Return consumed length */ - return byte_counter; -} - -/* Decode V.42bis parameter field - * (see also: 3GPP TS 44.065, 6.6.2.1, Table 7a) */ -static int decode_dcomp_v42bis_params(struct gprs_sndcp_dcomp_v42bis_params - *params, const uint8_t *src, - unsigned int src_len) -{ - int rc; - int byte_counter = 0; - - /* Mark all optional parameters invalid by default */ - params->p0 = -1; - params->p1 = -1; - params->p2 = -1; - - /* Decode applicable SAPIs */ - rc = decode_pcomp_applicable_sapis(params->nsapi, ¶ms->nsapi_len, - src, src_len); - if (rc > 0) { - byte_counter += rc; - src += rc; - } else - return byte_counter; - - /* Decode P0 (see also: 3GPP TS 44.065, 6.6.2.1, Table 7a) */ - rc = decode_pcomp_8_bit_field(¶ms->p0, NULL, src, - src_len - byte_counter, 0, 3); - if (rc <= 0) - return byte_counter; - byte_counter += rc; - src += rc; - - /* Decode P1 (see also: 3GPP TS 44.065, 6.6.2.1, Table 7a) */ - rc = decode_pcomp_16_bit_field(¶ms->p1, NULL, src, - src_len - byte_counter, 512, 65535); - if (rc <= 0) - return byte_counter; - byte_counter += rc; - src += rc; - - /* Decode P2 (see also: 3GPP TS 44.065, 6.6.2.1, Table 7a) */ - rc = decode_pcomp_8_bit_field(¶ms->p2, NULL, src, - src_len - byte_counter, 6, 250); - if (rc <= 0) - return byte_counter; - byte_counter += rc; - src += rc; - - /* Return consumed length */ - return byte_counter; -} - -/* Decode V44 parameter field (see also: 3GPP TS 44.065, 6.6.3.1, Table 7c) */ -static int decode_dcomp_v44_params(struct gprs_sndcp_dcomp_v44_params *params, - const uint8_t *src, unsigned int src_len) -{ - int rc; - int byte_counter = 0; - - /* Mark all optional parameters invalid by default */ - params->c0 = -1; - params->p0 = -1; - params->p1t = -1; - params->p1r = -1; - params->p3t = -1; - params->p3r = -1; - - /* Decode applicable SAPIs */ - rc = decode_pcomp_applicable_sapis(params->nsapi, ¶ms->nsapi_len, - src, src_len); - if (rc > 0) { - byte_counter += rc; - src += rc; - } else - return byte_counter; - - /* Decode C0 (see also: 3GPP TS 44.065, 6.6.3.1, Table 7c) */ - rc = decode_pcomp_8_bit_field(¶ms->c0, NULL, src, - src_len - byte_counter, 0, 255); - if (rc <= 0) - return byte_counter; - if ((params->c0 != 0x80) && (params->c0 != 0xC0)) - return -EINVAL; - byte_counter += rc; - src += rc; - - /* Decode P0 (see also: 3GPP TS 44.065, 6.6.3.1, Table 7c) */ - rc = decode_pcomp_8_bit_field(¶ms->p0, NULL, src, - src_len - byte_counter, 0, 3); - if (rc <= 0) - return byte_counter; - byte_counter += rc; - src += rc; - - /* Decode P1T (see also: 3GPP TS 44.065, 6.6.3.1, Table 7c) */ - rc = decode_pcomp_16_bit_field(¶ms->p1t, NULL, src, - src_len - byte_counter, 265, 65535); - if (rc <= 0) - return byte_counter; - byte_counter += rc; - src += rc; - - /* Decode P1R (see also: 3GPP TS 44.065, 6.6.3.1, Table 7c) */ - rc = decode_pcomp_16_bit_field(¶ms->p1r, NULL, src, - src_len - byte_counter, 265, 65535); - if (rc <= 0) - return byte_counter; - byte_counter += rc; - src += rc; - - /* Decode P3T (see also: 3GPP TS 44.065, 6.6.3.1, Table 7c) */ - rc = decode_pcomp_16_bit_field(¶ms->p3t, NULL, src, - src_len - byte_counter, 265, 65535); - if (rc <= 0) - return byte_counter; - if (params->p3t < 2 * params->p1t) - return -EINVAL; - byte_counter += rc; - src += rc; - - /* Decode P3R (see also: 3GPP TS 44.065, 6.6.3.1, Table 7c) */ - rc = decode_pcomp_16_bit_field(¶ms->p3r, NULL, src, - src_len - byte_counter, 265, 65535); - if (rc <= 0) - return byte_counter; - if (params->p3r < 2 * params->p1r) - return -EINVAL; - byte_counter += rc; - src += rc; - - /* Return consumed length */ - return byte_counter; -} - -/* Lookup algorithm identfier by entity ID */ -static int lookup_algorithm_identifier(int entity, const struct - entity_algo_table - *lt, unsigned int lt_len, int compclass) -{ - int i; - - if (!lt) - return -1; - - for (i = 0; i < lt_len; i++) { - if ((lt[i].entity == entity) - && (lt[i].compclass == compclass)) - return lt[i].algo; - } - - return -1; -} - -/* Helper function for decode_comp_field(), decodes - * numeric pcomp/dcomp values */ -static int decode_comp_values(struct gprs_sndcp_comp_field *comp_field, - const uint8_t *src, int compclass) -{ - int src_counter = 0; - int i; - - if (comp_field->p) { - /* Determine the number of expected PCOMP/DCOMP values */ - if (compclass == SNDCP_XID_PROTOCOL_COMPRESSION) { - /* For protocol compression */ - switch (comp_field->algo) { - case RFC_1144: - comp_field->comp_len = RFC1144_PCOMP_NUM; - break; - case RFC_2507: - comp_field->comp_len = RFC2507_PCOMP_NUM; - break; - case ROHC: - comp_field->comp_len = ROHC_PCOMP_NUM; - break; - - /* Exit if the algorithem type encodes - something unknown / unspecified */ - default: - return -EINVAL; - } - } else { - /* For data compression */ - switch (comp_field->algo) { - case V42BIS: - comp_field->comp_len = V42BIS_DCOMP_NUM; - break; - case V44: - comp_field->comp_len = V44_DCOMP_NUM; - break; - - /* Exit if the algorithem type encodes - something unknown / unspecified */ - default: - return -EINVAL; - } - } - - for (i = 0; i < comp_field->comp_len; i++) { - if (i & 1) { - comp_field->comp[i] = (*src) & 0x0F; - src++; - src_counter++; - } else - comp_field->comp[i] = ((*src) >> 4) & 0x0F; - } - - if (i & 1) { - src++; - src_counter++; - } - } - - return src_counter; -} - -/* Helper function for decode_comp_field(), decodes the parameters - * which are protocol compression specific */ -static int decode_pcomp_params(struct gprs_sndcp_comp_field *comp_field, - const uint8_t *src, int src_len) -{ - int rc; - - switch (comp_field->algo) { - case RFC_1144: - comp_field->rfc1144_params = talloc_zero(comp_field, struct - gprs_sndcp_pcomp_rfc1144_params); - rc = decode_pcomp_rfc1144_params(comp_field->rfc1144_params, - src, src_len); - if (rc < 0) - talloc_free(comp_field->rfc1144_params); - break; - case RFC_2507: - comp_field->rfc2507_params = talloc_zero(comp_field, struct - gprs_sndcp_pcomp_rfc2507_params); - rc = decode_pcomp_rfc2507_params(comp_field->rfc2507_params, - src, src_len); - if (rc < 0) - talloc_free(comp_field->rfc1144_params); - break; - case ROHC: - comp_field->rohc_params = talloc_zero(comp_field, struct - gprs_sndcp_pcomp_rohc_params); - rc = decode_pcomp_rohc_params(comp_field->rohc_params, src, - src_len); - if (rc < 0) - talloc_free(comp_field->rohc_params); - break; - - /* If no suitable decoder is detected, - leave the remaining bytes undecoded */ - default: - rc = src_len; - } - - if (rc < 0) { - comp_field->rfc1144_params = NULL; - comp_field->rfc2507_params = NULL; - comp_field->rohc_params = NULL; - } - - return rc; -} - -/* Helper function for decode_comp_field(), decodes the parameters - * which are data compression specific */ -static int decode_dcomp_params(struct gprs_sndcp_comp_field *comp_field, - const uint8_t *src, int src_len) -{ - int rc; - - switch (comp_field->algo) { - case V42BIS: - comp_field->v42bis_params = talloc_zero(comp_field, struct - gprs_sndcp_dcomp_v42bis_params); - rc = decode_dcomp_v42bis_params(comp_field->v42bis_params, src, - src_len); - if (rc < 0) - talloc_free(comp_field->v42bis_params); - break; - case V44: - comp_field->v44_params = talloc_zero(comp_field, struct - gprs_sndcp_dcomp_v44_params); - rc = decode_dcomp_v44_params(comp_field->v44_params, src, - src_len); - if (rc < 0) - talloc_free(comp_field->v44_params); - break; - - /* If no suitable decoder is detected, - * leave the remaining bytes undecoded */ - default: - rc = src_len; - } - - if (rc < 0) { - comp_field->v42bis_params = NULL; - comp_field->v44_params = NULL; - } - - return rc; -} - -/* Decode data or protocol control information compression field - * (see also: 3GPP TS 44.065, 6.6.1.1, Figure 9 and - * 3GPP TS 44.065, 6.5.1.1, Figure 7) */ -static int decode_comp_field(struct gprs_sndcp_comp_field *comp_field, - const uint8_t *src, unsigned int src_len, - const struct entity_algo_table *lt, - unsigned int lt_len, int compclass) -{ - int src_counter = 0; - unsigned int len; - int rc; - - OSMO_ASSERT(comp_field); - - /* Exit immediately if it is clear that no - parseable data is present */ - if (src_len < 1 || !src) - return -EINVAL; - - /* Zero out target struct */ - memset(comp_field, 0, sizeof(struct gprs_sndcp_comp_field)); - - /* Decode Propose bit and Entity number */ - if ((*src) & 0x80) - comp_field->p = 1; - comp_field->entity = (*src) & 0x1F; - src_counter++; - src++; - - /* Decode algorithm number (if present) */ - if (comp_field->p) { - comp_field->algo = (*src) & 0x1F; - src_counter++; - src++; - } - /* Alternatively take the information from the lookup table */ - else - comp_field->algo = - lookup_algorithm_identifier(comp_field->entity, lt, - lt_len, compclass); - - /* Decode length field */ - len = *src; - src_counter++; - src++; - - /* Decode PCOMP/DCOMP values */ - rc = decode_comp_values(comp_field, src, compclass); - if (rc < 0) - return -EINVAL; - src_counter += rc; - src += rc; - len -= rc; - - /* Decode algorithm specific payload data */ - if (compclass == SNDCP_XID_PROTOCOL_COMPRESSION) - rc = decode_pcomp_params(comp_field, src, len); - else if (compclass == SNDCP_XID_DATA_COMPRESSION) - rc = decode_dcomp_params(comp_field, src, len); - else - return -EINVAL; - - if (rc >= 0) - src_counter += rc; - else - return -EINVAL; - - /* Return consumed length */ - return src_counter; -} - -/* Helper function for gprs_sndcp_decode_xid() to decode XID blocks */ -static int decode_xid_block(struct llist_head *comp_fields, uint8_t tag, - uint16_t tag_len, const uint8_t *val, - const struct entity_algo_table *lt, - unsigned int lt_len) -{ - struct gprs_sndcp_comp_field *comp_field; - int byte_counter = 0; - int comp_field_count = 0; - int rc; - - byte_counter = 0; - do { - /* Bail if more than the maximum number of - comp_fields is generated */ - if (comp_field_count > MAX_ENTITIES * 2) { - return -EINVAL; - } - - /* Parse and add comp_field */ - comp_field = - talloc_zero(comp_fields, struct gprs_sndcp_comp_field); - - rc = decode_comp_field(comp_field, val + byte_counter, - tag_len - byte_counter, lt, lt_len, tag); - - if (rc < 0) { - talloc_free(comp_field); - return -EINVAL; - } - - byte_counter += rc; - llist_add(&comp_field->list, comp_fields); - comp_field_count++; - } - while (tag_len - byte_counter > 0); - - return byte_counter; -} - -/* Transform an SNDCP-XID message (src) into a list of SNDCP-XID fields */ -static int gprs_sndcp_decode_xid(int *version, struct llist_head *comp_fields, - const uint8_t *src, unsigned int src_len, - const struct entity_algo_table *lt, - unsigned int lt_len) -{ - int src_pos = 0; - uint8_t tag; - uint16_t tag_len; - const uint8_t *val; - int byte_counter = 0; - int rc; - int tlv_count = 0; - - /* Preset version value as invalid */ - if (version) - *version = -1; - - /* Valid TLV-Tag and types */ - static const struct tlv_definition sndcp_xid_def = { - .def = { - [SNDCP_XID_VERSION_NUMBER] = {TLV_TYPE_TLV,}, - [SNDCP_XID_DATA_COMPRESSION] = {TLV_TYPE_TLV,}, - [SNDCP_XID_PROTOCOL_COMPRESSION] = {TLV_TYPE_TLV,}, - }, - }; - - /* Parse TLV-Encoded SNDCP-XID message and defer payload - to the apporpiate sub-parser functions */ - while (1) { - - /* Bail if an the maximum number of TLV fields - * have been parsed */ - if (tlv_count >= 3) { - talloc_free(comp_fields); - return -EINVAL; - } - - /* Parse TLV field */ - rc = tlv_parse_one(&tag, &tag_len, &val, &sndcp_xid_def, - src + src_pos, src_len - src_pos); - if (rc > 0) - src_pos += rc; - else { - talloc_free(comp_fields); - return -EINVAL; - } - - /* Decode sndcp xid version number */ - if (version && tag == SNDCP_XID_VERSION_NUMBER) - *version = val[0]; - - /* Decode compression parameters */ - if ((tag == SNDCP_XID_PROTOCOL_COMPRESSION) - || (tag == SNDCP_XID_DATA_COMPRESSION)) { - rc = decode_xid_block(comp_fields, tag, tag_len, val, - lt, lt_len); - - if (rc < 0) { - talloc_free(comp_fields); - return -EINVAL; - } else - byte_counter += rc; - } - - /* Stop when no further TLV elements can be expected */ - if (src_len - src_pos <= 2) - break; - - tlv_count++; - } - - return 0; -} - -/* Fill up lookutable from a list with comression entitiy fields */ -static int gprs_sndcp_fill_table(struct - entity_algo_table *lt, - unsigned int lt_len, - const struct llist_head *comp_fields) -{ - struct gprs_sndcp_comp_field *comp_field; - int i = 0; - int rc; - - if (!comp_fields) - return -EINVAL; - if (!lt) - return -EINVAL; - - memset(lt, 0, sizeof(*lt)); - - llist_for_each_entry(comp_field, comp_fields, list) { - if (comp_field->algo >= 0) { - lt[i].entity = comp_field->entity; - lt[i].algo = comp_field->algo; - rc = gprs_sndcp_get_compression_class(comp_field); - - if (rc < 0) { - memset(lt, 0, sizeof(*lt)); - return -EINVAL; - } - - lt[i].compclass = rc; - i++; - } - } - - return i; -} - -/* Complete comp field params - * (if a param (dst) is not valid, it will be copied from source (src) */ -static int complete_comp_field_params(struct gprs_sndcp_comp_field - *comp_field_dst, const struct - gprs_sndcp_comp_field *comp_field_src) -{ - if (comp_field_dst->algo < 0) - return -EINVAL; - - if (comp_field_dst->rfc1144_params && comp_field_src->rfc1144_params) { - if (comp_field_dst->rfc1144_params->s01 < 0) { - comp_field_dst->rfc1144_params->s01 = - comp_field_src->rfc1144_params->s01; - } - return 0; - } - - if (comp_field_dst->rfc2507_params && comp_field_src->rfc2507_params) { - - if (comp_field_dst->rfc2507_params->f_max_period < 0) { - comp_field_dst->rfc2507_params->f_max_period = - comp_field_src->rfc2507_params->f_max_period; - } - if (comp_field_dst->rfc2507_params->f_max_time < 0) { - comp_field_dst->rfc2507_params->f_max_time = - comp_field_src->rfc2507_params->f_max_time; - } - if (comp_field_dst->rfc2507_params->max_header < 0) { - comp_field_dst->rfc2507_params->max_header = - comp_field_src->rfc2507_params->max_header; - } - if (comp_field_dst->rfc2507_params->tcp_space < 0) { - comp_field_dst->rfc2507_params->tcp_space = - comp_field_src->rfc2507_params->tcp_space; - } - if (comp_field_dst->rfc2507_params->non_tcp_space < 0) { - comp_field_dst->rfc2507_params->non_tcp_space = - comp_field_src->rfc2507_params->non_tcp_space; - } - return 0; - } - - if (comp_field_dst->rohc_params && comp_field_src->rohc_params) { - if (comp_field_dst->rohc_params->max_cid < 0) { - comp_field_dst->rohc_params->max_cid = - comp_field_src->rohc_params->max_cid; - } - if (comp_field_dst->rohc_params->max_header < 0) { - comp_field_dst->rohc_params->max_header = - comp_field_src->rohc_params->max_header; - } - if (comp_field_dst->rohc_params->profile_len > 0) { - memcpy(comp_field_dst->rohc_params->profile, - comp_field_src->rohc_params->profile, - sizeof(comp_field_dst->rohc_params->profile)); - comp_field_dst->rohc_params->profile_len = - comp_field_src->rohc_params->profile_len; - } - - return 0; - } - - if (comp_field_dst->v42bis_params && comp_field_src->v42bis_params) { - if (comp_field_dst->v42bis_params->p0 < 0) { - comp_field_dst->v42bis_params->p0 = - comp_field_src->v42bis_params->p0; - } - if (comp_field_dst->v42bis_params->p1 < 0) { - comp_field_dst->v42bis_params->p1 = - comp_field_src->v42bis_params->p1; - } - if (comp_field_dst->v42bis_params->p2 < 0) { - comp_field_dst->v42bis_params->p2 = - comp_field_src->v42bis_params->p2; - } - return 0; - } - - if (comp_field_dst->v44_params && comp_field_src->v44_params) { - if (comp_field_dst->v44_params->c0 < 0) { - comp_field_dst->v44_params->c0 = - comp_field_src->v44_params->c0; - } - if (comp_field_dst->v44_params->p0 < 0) { - comp_field_dst->v44_params->p0 = - comp_field_src->v44_params->p0; - } - if (comp_field_dst->v44_params->p1t < 0) { - comp_field_dst->v44_params->p1t = - comp_field_src->v44_params->p1t; - } - if (comp_field_dst->v44_params->p1r < 0) { - comp_field_dst->v44_params->p1r = - comp_field_src->v44_params->p1r; - } - if (comp_field_dst->v44_params->p3t < 0) { - comp_field_dst->v44_params->p3t = - comp_field_src->v44_params->p3t; - } - if (comp_field_dst->v44_params->p3r < 0) { - comp_field_dst->v44_params->p3r = - comp_field_src->v44_params->p3r; - } - return 0; - } - - /* There should be at least exist one param set - * in the destination struct, otherwise something - * must be wrong! */ - return -EINVAL; -} - -/* Complete missing parameters in a comp_field */ -static int gprs_sndcp_complete_comp_field(struct gprs_sndcp_comp_field - *comp_field, const struct llist_head - *comp_fields) -{ - struct gprs_sndcp_comp_field *comp_field_src; - int rc = 0; - - llist_for_each_entry(comp_field_src, comp_fields, list) { - if (comp_field_src->entity == comp_field->entity) { - - /* Complete header fields */ - if (comp_field_src->comp_len > 0) { - memcpy(comp_field->comp, - comp_field_src->comp, - sizeof(comp_field_src->comp)); - comp_field->comp_len = comp_field_src->comp_len; - } - - /* Complete parameter fields */ - rc = complete_comp_field_params(comp_field, - comp_field_src); - } - } - - return rc; -} - -/* Complete missing parameters of all comp_field in a list */ -static int gprs_sndcp_complete_comp_fields(struct llist_head - *comp_fields_incomplete, - const struct llist_head *comp_fields) -{ - struct gprs_sndcp_comp_field *comp_field_incomplete; - int rc; - - llist_for_each_entry(comp_field_incomplete, comp_fields_incomplete, - list) { - - rc = gprs_sndcp_complete_comp_field(comp_field_incomplete, - comp_fields); - if (rc < 0) - return -EINVAL; - - } - - return 0; -} - -/* Transform an SNDCP-XID message (src) into a list of SNDCP-XID fields */ -struct llist_head *gprs_sndcp_parse_xid(int *version, - const void *ctx, - const uint8_t *src, - unsigned int src_len, - const struct llist_head - *comp_fields_req) -{ - int rc; - int lt_len; - struct llist_head *comp_fields; - struct entity_algo_table lt[MAX_ENTITIES * 2]; - - /* In case of a zero length field, just exit */ - if (src_len == 0) - return NULL; - - /* We should go any further if we have a field length greater - * zero and a null pointer as buffer! */ - OSMO_ASSERT(src); - - comp_fields = talloc_zero(ctx, struct llist_head); - INIT_LLIST_HEAD(comp_fields); - - if (comp_fields_req) { - /* Generate lookup table */ - lt_len = - gprs_sndcp_fill_table(lt, MAX_ENTITIES * 2, - comp_fields_req); - if (lt_len < 0) { - talloc_free(comp_fields); - return NULL; - } - - /* Parse SNDCP-CID XID-Field */ - rc = gprs_sndcp_decode_xid(version, comp_fields, src, src_len, - lt, lt_len); - if (rc < 0) { - talloc_free(comp_fields); - return NULL; - } - - rc = gprs_sndcp_complete_comp_fields(comp_fields, - comp_fields_req); - if (rc < 0) { - talloc_free(comp_fields); - return NULL; - } - - } else { - /* Parse SNDCP-CID XID-Field */ - rc = gprs_sndcp_decode_xid(version, comp_fields, src, src_len, - NULL, 0); - if (rc < 0) { - talloc_free(comp_fields); - return NULL; - } - } - - return comp_fields; -} - -/* Helper for gprs_sndcp_dump_comp_fields(), - * dumps protocol compression parameters */ -static void dump_pcomp_params(const struct gprs_sndcp_comp_field - *comp_field, unsigned int logl) -{ - int i; - - switch (comp_field->algo) { - case RFC_1144: - if (comp_field->rfc1144_params == NULL) { - LOGP(DSNDCP, logl, - " gprs_sndcp_pcomp_rfc1144_params=NULL\n"); - break; - } - LOGP(DSNDCP, logl, " gprs_sndcp_pcomp_rfc1144_params {\n"); - LOGP(DSNDCP, logl, - " nsapi_len=%d;\n", - comp_field->rfc1144_params->nsapi_len); - if (comp_field->rfc1144_params->nsapi_len == 0) - LOGP(DSNDCP, logl, " nsapi[] = NULL;\n"); - for (i = 0; i < comp_field->rfc1144_params->nsapi_len; i++) { - LOGP(DSNDCP, logl, - " nsapi[%d]=%d;\n", i, - comp_field->rfc1144_params->nsapi[i]); - } - LOGP(DSNDCP, logl, " s01=%d;\n", - comp_field->rfc1144_params->s01); - LOGP(DSNDCP, logl, " }\n"); - break; - case RFC_2507: - if (comp_field->rfc2507_params == NULL) { - LOGP(DSNDCP, logl, - " gprs_sndcp_pcomp_rfc2507_params=NULL\n"); - break; - } - LOGP(DSNDCP, logl, " gprs_sndcp_pcomp_rfc2507_params {\n"); - LOGP(DSNDCP, logl, - " nsapi_len=%d;\n", - comp_field->rfc2507_params->nsapi_len); - if (comp_field->rfc2507_params->nsapi_len == 0) - LOGP(DSNDCP, logl, " nsapi[] = NULL;\n"); - for (i = 0; i < comp_field->rfc2507_params->nsapi_len; i++) { - LOGP(DSNDCP, logl, - " nsapi[%d]=%d;\n", i, - comp_field->rfc2507_params->nsapi[i]); - } - LOGP(DSNDCP, logl, - " f_max_period=%d;\n", - comp_field->rfc2507_params->f_max_period); - LOGP(DSNDCP, logl, - " f_max_time=%d;\n", - comp_field->rfc2507_params->f_max_time); - LOGP(DSNDCP, logl, - " max_header=%d;\n", - comp_field->rfc2507_params->max_header); - LOGP(DSNDCP, logl, - " tcp_space=%d;\n", - comp_field->rfc2507_params->tcp_space); - LOGP(DSNDCP, logl, - " non_tcp_space=%d;\n", - comp_field->rfc2507_params->non_tcp_space); - LOGP(DSNDCP, logl, " }\n"); - break; - case ROHC: - if (comp_field->rohc_params == NULL) { - LOGP(DSNDCP, logl, - " gprs_sndcp_pcomp_rohc_params=NULL\n"); - break; - } - LOGP(DSNDCP, logl, " gprs_sndcp_pcomp_rohc_params {\n"); - LOGP(DSNDCP, logl, - " nsapi_len=%d;\n", - comp_field->rohc_params->nsapi_len); - if (comp_field->rohc_params->nsapi_len == 0) - LOGP(DSNDCP, logl, " nsapi[] = NULL;\n"); - for (i = 0; i < comp_field->rohc_params->nsapi_len; i++) { - LOGP(DSNDCP, logl, - " nsapi[%d]=%d;\n", i, - comp_field->rohc_params->nsapi[i]); - } - LOGP(DSNDCP, logl, - " max_cid=%d;\n", comp_field->rohc_params->max_cid); - LOGP(DSNDCP, logl, - " max_header=%d;\n", - comp_field->rohc_params->max_header); - LOGP(DSNDCP, logl, - " profile_len=%d;\n", - comp_field->rohc_params->profile_len); - if (comp_field->rohc_params->profile_len == 0) - LOGP(DSNDCP, logl, " profile[] = NULL;\n"); - for (i = 0; i < comp_field->rohc_params->profile_len; i++) - LOGP(DSNDCP, logl, - " profile[%d]=%04x;\n", - i, comp_field->rohc_params->profile[i]); - LOGP(DSNDCP, logl, " }\n"); - break; - } - -} - -/* Helper for gprs_sndcp_dump_comp_fields(), - * data protocol compression parameters */ -static void dump_dcomp_params(const struct gprs_sndcp_comp_field - *comp_field, unsigned int logl) -{ - int i; - - switch (comp_field->algo) { - case V42BIS: - if (comp_field->v42bis_params == NULL) { - LOGP(DSNDCP, logl, - " gprs_sndcp_dcomp_v42bis_params=NULL\n"); - break; - } - LOGP(DSNDCP, logl, " gprs_sndcp_dcomp_v42bis_params {\n"); - LOGP(DSNDCP, logl, - " nsapi_len=%d;\n", - comp_field->v42bis_params->nsapi_len); - if (comp_field->v42bis_params->nsapi_len == 0) - LOGP(DSNDCP, logl, " nsapi[] = NULL;\n"); - for (i = 0; i < comp_field->v42bis_params->nsapi_len; i++) - LOGP(DSNDCP, logl, - " nsapi[%d]=%d;\n", i, - comp_field->v42bis_params->nsapi[i]); - LOGP(DSNDCP, logl, " p0=%d;\n", - comp_field->v42bis_params->p0); - LOGP(DSNDCP, logl, " p1=%d;\n", - comp_field->v42bis_params->p1); - LOGP(DSNDCP, logl, " p2=%d;\n", - comp_field->v42bis_params->p2); - LOGP(DSNDCP, logl, " }\n"); - break; - case V44: - if (comp_field->v44_params == NULL) { - LOGP(DSNDCP, logl, - " gprs_sndcp_dcomp_v44_params=NULL\n"); - break; - } - LOGP(DSNDCP, logl, " gprs_sndcp_dcomp_v44_params {\n"); - LOGP(DSNDCP, logl, - " nsapi_len=%d;\n", - comp_field->v44_params->nsapi_len); - if (comp_field->v44_params->nsapi_len == 0) - LOGP(DSNDCP, logl, " nsapi[] = NULL;\n"); - for (i = 0; i < comp_field->v44_params->nsapi_len; i++) { - LOGP(DSNDCP, logl, - " nsapi[%d]=%d;\n", i, - comp_field->v44_params->nsapi[i]); - } - LOGP(DSNDCP, logl, " c0=%d;\n", - comp_field->v44_params->c0); - LOGP(DSNDCP, logl, " p0=%d;\n", - comp_field->v44_params->p0); - LOGP(DSNDCP, logl, " p1t=%d;\n", - comp_field->v44_params->p1t); - LOGP(DSNDCP, logl, " p1r=%d;\n", - comp_field->v44_params->p1r); - LOGP(DSNDCP, logl, " p3t=%d;\n", - comp_field->v44_params->p3t); - LOGP(DSNDCP, logl, " p3r=%d;\n", - comp_field->v44_params->p3r); - LOGP(DSNDCP, logl, " }\n"); - break; - } -} - -/* Dump a list with SNDCP-XID fields (Debug) */ -void gprs_sndcp_dump_comp_fields(const struct llist_head *comp_fields, - unsigned int logl) -{ - struct gprs_sndcp_comp_field *comp_field; - int i; - int compclass; - - OSMO_ASSERT(comp_fields); - - llist_for_each_entry(comp_field, comp_fields, list) { - LOGP(DSNDCP, logl, "SNDCP-XID:\n"); - LOGP(DSNDCP, logl, "struct gprs_sndcp_comp_field {\n"); - LOGP(DSNDCP, logl, " entity=%d;\n", comp_field->entity); - LOGP(DSNDCP, logl, " algo=%d;\n", comp_field->algo); - LOGP(DSNDCP, logl, " comp_len=%d;\n", comp_field->comp_len); - if (comp_field->comp_len == 0) - LOGP(DSNDCP, logl, " comp[] = NULL;\n"); - for (i = 0; i < comp_field->comp_len; i++) { - LOGP(DSNDCP, logl, " comp[%d]=%d;\n", i, - comp_field->comp[i]); - } - - compclass = gprs_sndcp_get_compression_class(comp_field); - - if (compclass == SNDCP_XID_PROTOCOL_COMPRESSION) { - dump_pcomp_params(comp_field, logl); - } else if (compclass == SNDCP_XID_DATA_COMPRESSION) { - dump_dcomp_params(comp_field, logl); - } - - LOGP(DSNDCP, logl, "}\n"); - } - -} diff --git a/openbsc/src/gprs/gprs_subscriber.c b/openbsc/src/gprs/gprs_subscriber.c deleted file mode 100644 index d13bd8393..000000000 --- a/openbsc/src/gprs/gprs_subscriber.c +++ /dev/null @@ -1,936 +0,0 @@ -/* MS subscriber data handling */ - -/* (C) 2014 by sysmocom s.f.m.c. GmbH - * (C) 2015 by Holger Hans Peter Freyther - * - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <osmocom/gsm/protocol/gsm_04_08_gprs.h> -#include <osmocom/gsm/gsup.h> -#include <osmocom/gsm/apn.h> -#include <osmocom/core/utils.h> -#include <osmocom/core/logging.h> -#include <openbsc/gprs_subscriber.h> -#include <openbsc/gsup_client.h> - -#include <openbsc/sgsn.h> -#include <openbsc/gprs_sgsn.h> -#include <openbsc/gprs_gmm.h> -#include <openbsc/gprs_utils.h> - -#include <openbsc/debug.h> - -#include <netinet/in.h> -#include <arpa/inet.h> -#include <limits.h> - -#define SGSN_SUBSCR_MAX_RETRIES 3 -#define SGSN_SUBSCR_RETRY_INTERVAL 10 - -#define LOGGSUPP(level, gsup, fmt, args...) \ - LOGP(DGPRS, level, "GSUP(%s) " fmt, \ - (gsup)->imsi, \ - ## args) - -extern void *tall_bsc_ctx; - -LLIST_HEAD(_gprs_subscribers); -struct llist_head * const gprs_subscribers = &_gprs_subscribers; - -static int gsup_read_cb(struct gsup_client *gsupc, struct msgb *msg); - -/* TODO: Some functions are specific to the SGSN, but this file is more general - * (it has gprs_* name). Either move these functions elsewhere, split them and - * move a part, or replace the gprs_ prefix by sgsn_. The applies to - * gprs_subscr_init, gsup_read_cb, and gprs_subscr_tx_gsup_message. - */ - -int gprs_subscr_init(struct sgsn_instance *sgi) -{ - const char *addr_str; - - if (!sgi->cfg.gsup_server_addr.sin_addr.s_addr) - return 0; - - addr_str = inet_ntoa(sgi->cfg.gsup_server_addr.sin_addr); - - sgi->gsup_client = gsup_client_create( - addr_str, sgi->cfg.gsup_server_port, - &gsup_read_cb, - &sgi->cfg.oap); - - if (!sgi->gsup_client) - return -1; - - return 1; -} - -static int gsup_read_cb(struct gsup_client *gsupc, struct msgb *msg) -{ - int rc; - - rc = gprs_subscr_rx_gsup_message(msg); - msgb_free(msg); - if (rc < 0) - return -1; - - return rc; -} - -int gprs_subscr_purge(struct gprs_subscr *subscr); - -static struct sgsn_subscriber_data *sgsn_subscriber_data_alloc(void *ctx) -{ - struct sgsn_subscriber_data *sdata; - int idx; - - sdata = talloc_zero(ctx, struct sgsn_subscriber_data); - - sdata->error_cause = SGSN_ERROR_CAUSE_NONE; - - for (idx = 0; idx < ARRAY_SIZE(sdata->auth_triplets); idx++) - sdata->auth_triplets[idx].key_seq = GSM_KEY_SEQ_INVAL; - - INIT_LLIST_HEAD(&sdata->pdp_list); - - return sdata; -} - -struct sgsn_subscriber_pdp_data* sgsn_subscriber_pdp_data_alloc( - struct sgsn_subscriber_data *sdata) -{ - struct sgsn_subscriber_pdp_data* pdata; - - pdata = talloc_zero(sdata, struct sgsn_subscriber_pdp_data); - - llist_add_tail(&pdata->list, &sdata->pdp_list); - - return pdata; -} - -struct gprs_subscr *gprs_subscr_get_by_imsi(const char *imsi) -{ - struct gprs_subscr *gsub; - - if (!imsi || !*imsi) - return NULL; - - llist_for_each_entry(gsub, gprs_subscribers, entry) { - if (!strcmp(gsub->imsi, imsi)) - return gprs_subscr_get(gsub); - } - return NULL; -} - -static struct gprs_subscr *gprs_subscr_alloc(void) -{ - struct gprs_subscr *gsub; - gsub = talloc_zero(tall_bsc_ctx, struct gprs_subscr); - if (!gsub) - return NULL; - llist_add_tail(&gsub->entry, gprs_subscribers); - gsub->use_count = 1; - gsub->tmsi = GSM_RESERVED_TMSI; - return gsub; -} - -struct gprs_subscr *gprs_subscr_get_or_create(const char *imsi) -{ - struct gprs_subscr *gsub; - - gsub = gprs_subscr_get_by_imsi(imsi); - if (!gsub) { - gsub = gprs_subscr_alloc(); - if (!gsub) - return NULL; - osmo_strlcpy(gsub->imsi, imsi, sizeof(gsub->imsi)); - } - - if (!gsub->sgsn_data) - gsub->sgsn_data = sgsn_subscriber_data_alloc(gsub); - return gsub; -} - -void gprs_subscr_cleanup(struct gprs_subscr *subscr) -{ - if (subscr->sgsn_data->mm) { - gprs_subscr_put(subscr->sgsn_data->mm->subscr); - subscr->sgsn_data->mm->subscr = NULL; - subscr->sgsn_data->mm = NULL; - } - - if (subscr->flags & GPRS_SUBSCRIBER_ENABLE_PURGE) { - gprs_subscr_purge(subscr); - subscr->flags &= ~GPRS_SUBSCRIBER_ENABLE_PURGE; - } -} - -void gprs_subscr_cancel(struct gprs_subscr *subscr) -{ - subscr->authorized = 0; - subscr->flags |= GPRS_SUBSCRIBER_CANCELLED; - subscr->flags &= ~GPRS_SUBSCRIBER_ENABLE_PURGE; - - gprs_subscr_update(subscr); - gprs_subscr_cleanup(subscr); -} - -static int gprs_subscr_tx_gsup_message(struct gprs_subscr *subscr, - struct osmo_gsup_message *gsup_msg) -{ - struct msgb *msg = gsup_client_msgb_alloc(); - - if (strlen(gsup_msg->imsi) == 0 && subscr) - osmo_strlcpy(gsup_msg->imsi, subscr->imsi, - sizeof(gsup_msg->imsi)); - gsup_msg->cn_domain = OSMO_GSUP_CN_DOMAIN_PS; - osmo_gsup_encode(msg, gsup_msg); - - LOGGSUBSCRP(LOGL_INFO, subscr, - "Sending GSUP, will send: %s\n", msgb_hexdump(msg)); - - if (!sgsn->gsup_client) { - msgb_free(msg); - return -ENOTSUP; - } - - return gsup_client_send(sgsn->gsup_client, msg); -} - -static int gprs_subscr_tx_gsup_error_reply(struct gprs_subscr *subscr, - struct osmo_gsup_message *gsup_orig, - enum gsm48_gmm_cause cause) -{ - struct osmo_gsup_message gsup_reply = {0}; - - osmo_strlcpy(gsup_reply.imsi, gsup_orig->imsi, - sizeof(gsup_reply.imsi)); - gsup_reply.cause = cause; - gsup_reply.message_type = - OSMO_GSUP_TO_MSGT_ERROR(gsup_orig->message_type); - - return gprs_subscr_tx_gsup_message(subscr, &gsup_reply); -} - -static int gprs_subscr_handle_gsup_auth_res(struct gprs_subscr *subscr, - struct osmo_gsup_message *gsup_msg) -{ - unsigned idx; - struct sgsn_subscriber_data *sdata = subscr->sgsn_data; - - LOGGSUBSCRP(LOGL_INFO, subscr, - "Got SendAuthenticationInfoResult, num_auth_vectors = %zu\n", - gsup_msg->num_auth_vectors); - - if (gsup_msg->num_auth_vectors > 0) { - memset(sdata->auth_triplets, 0, sizeof(sdata->auth_triplets)); - - for (idx = 0; idx < ARRAY_SIZE(sdata->auth_triplets); idx++) - sdata->auth_triplets[idx].key_seq = GSM_KEY_SEQ_INVAL; - } - - for (idx = 0; idx < gsup_msg->num_auth_vectors; idx++) { - size_t key_seq = idx; - LOGGSUBSCRP(LOGL_DEBUG, subscr, - "Adding auth tuple, cksn = %zu\n", key_seq); - if (key_seq >= ARRAY_SIZE(sdata->auth_triplets)) { - LOGGSUBSCRP(LOGL_NOTICE, subscr, - "Skipping auth triplet with invalid cksn %zu\n", - key_seq); - continue; - } - sdata->auth_triplets[key_seq].vec = gsup_msg->auth_vectors[idx]; - sdata->auth_triplets[key_seq].key_seq = key_seq; - } - - sdata->auth_triplets_updated = 1; - sdata->error_cause = SGSN_ERROR_CAUSE_NONE; - - gprs_subscr_update_auth_info(subscr); - - return 0; -} - -static int gprs_subscr_pdp_data_clear(struct gprs_subscr *subscr) -{ - struct sgsn_subscriber_pdp_data *pdp, *pdp2; - int count = 0; - - llist_for_each_entry_safe(pdp, pdp2, &subscr->sgsn_data->pdp_list, list) { - llist_del(&pdp->list); - talloc_free(pdp); - count += 1; - } - - return count; -} - -static struct sgsn_subscriber_pdp_data *gprs_subscr_pdp_data_get_by_id( - struct gprs_subscr *subscr, unsigned context_id) -{ - struct sgsn_subscriber_pdp_data *pdp; - - llist_for_each_entry(pdp, &subscr->sgsn_data->pdp_list, list) { - if (pdp->context_id == context_id) - return pdp; - } - - return NULL; -} - - -static void gprs_subscr_gsup_insert_data(struct gprs_subscr *subscr, - struct osmo_gsup_message *gsup_msg) -{ - struct sgsn_subscriber_data *sdata = subscr->sgsn_data; - unsigned idx; - int rc; - - if (gsup_msg->msisdn_enc) { - if (gsup_msg->msisdn_enc_len > sizeof(sdata->msisdn)) { - LOGP(DGPRS, LOGL_ERROR, "MSISDN too long (%zu)\n", - gsup_msg->msisdn_enc_len); - sdata->msisdn_len = 0; - } else { - memcpy(sdata->msisdn, gsup_msg->msisdn_enc, - gsup_msg->msisdn_enc_len); - sdata->msisdn_len = gsup_msg->msisdn_enc_len; - } - } - - if (gsup_msg->hlr_enc) { - if (gsup_msg->hlr_enc_len > sizeof(sdata->hlr)) { - LOGP(DGPRS, LOGL_ERROR, "HLR-Number too long (%zu)\n", - gsup_msg->hlr_enc_len); - sdata->hlr_len = 0; - } else { - memcpy(sdata->hlr, gsup_msg->hlr_enc, - gsup_msg->hlr_enc_len); - sdata->hlr_len = gsup_msg->hlr_enc_len; - } - } - - if (gsup_msg->pdp_charg_enc && gsup_msg->pdp_charg_enc_len >= sizeof(sdata->pdp_charg)) { - memcpy(&sdata->pdp_charg, gsup_msg->pdp_charg_enc, sizeof(sdata->pdp_charg)); - sdata->has_pdp_charg = 1; - } else { - sdata->has_pdp_charg = 0; - } - - if (gsup_msg->pdp_info_compl) { - rc = gprs_subscr_pdp_data_clear(subscr); - if (rc > 0) - LOGP(DGPRS, LOGL_INFO, "Cleared existing PDP info\n"); - } - - for (idx = 0; idx < gsup_msg->num_pdp_infos; idx++) { - struct osmo_gsup_pdp_info *pdp_info = &gsup_msg->pdp_infos[idx]; - size_t ctx_id = pdp_info->context_id; - struct sgsn_subscriber_pdp_data *pdp_data; - - if (pdp_info->apn_enc_len >= sizeof(pdp_data->apn_str)-1) { - LOGGSUBSCRP(LOGL_ERROR, subscr, - "APN too long, context id = %zu, APN = %s\n", - ctx_id, osmo_hexdump(pdp_info->apn_enc, - pdp_info->apn_enc_len)); - continue; - } - - if (pdp_info->qos_enc_len > sizeof(pdp_data->qos_subscribed)) { - LOGGSUBSCRP(LOGL_ERROR, subscr, - "QoS info too long (%zu)\n", - pdp_info->qos_enc_len); - continue; - } - - LOGGSUBSCRP(LOGL_INFO, subscr, - "Will set PDP info, context id = %zu, APN = %s\n", - ctx_id, osmo_hexdump(pdp_info->apn_enc, pdp_info->apn_enc_len)); - - /* Set PDP info [ctx_id] */ - pdp_data = gprs_subscr_pdp_data_get_by_id(subscr, ctx_id); - if (!pdp_data) { - pdp_data = sgsn_subscriber_pdp_data_alloc(subscr->sgsn_data); - pdp_data->context_id = ctx_id; - } - - OSMO_ASSERT(pdp_data != NULL); - pdp_data->pdp_type = pdp_info->pdp_type; - osmo_apn_to_str(pdp_data->apn_str, - pdp_info->apn_enc, pdp_info->apn_enc_len); - memcpy(pdp_data->qos_subscribed, pdp_info->qos_enc, pdp_info->qos_enc_len); - pdp_data->qos_subscribed_len = pdp_info->qos_enc_len; - - if (pdp_info->pdp_charg_enc && pdp_info->pdp_charg_enc_len >= sizeof(pdp_data->pdp_charg)) { - memcpy(&pdp_data->pdp_charg, pdp_info->pdp_charg_enc, sizeof(pdp_data->pdp_charg)); - pdp_data->has_pdp_charg = 1; - } else { - pdp_data->has_pdp_charg = 0; - } - } -} - -static int gprs_subscr_handle_gsup_upd_loc_res(struct gprs_subscr *subscr, - struct osmo_gsup_message *gsup_msg) -{ - /* contrary to MAP, we allow piggy-backing subscriber data onto - * the UPDATE LOCATION RESULT, and don't mandate the use of a - * separate nested INSERT SUBSCRIBER DATA transaction */ - gprs_subscr_gsup_insert_data(subscr, gsup_msg); - - subscr->authorized = 1; - subscr->sgsn_data->error_cause = SGSN_ERROR_CAUSE_NONE; - - subscr->flags |= GPRS_SUBSCRIBER_ENABLE_PURGE; - - gprs_subscr_update(subscr); - return 0; -} - -static int gprs_subscr_handle_gsup_dsd_req(struct gprs_subscr *subscr, - struct osmo_gsup_message *gsup_msg) -{ - struct osmo_gsup_message gsup_reply = {0}; - - if (gsup_msg->cn_domain != OSMO_GSUP_CN_DOMAIN_PS) { - LOGGSUBSCRP(LOGL_ERROR, subscr, - "Rx GSUP message %s not supported for CS\n", - osmo_gsup_message_type_name(gsup_msg->message_type)); - gsup_reply.cause = GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL; - gsup_reply.message_type = OSMO_GSUP_MSGT_DELETE_DATA_ERROR; - } else { - gsm0408_gprs_access_cancelled(subscr->sgsn_data->mm, - GMM_CAUSE_GPRS_NOTALLOWED); - gsup_reply.message_type = OSMO_GSUP_MSGT_DELETE_DATA_RESULT; - } - - return gprs_subscr_tx_gsup_message(subscr, &gsup_reply); -} - -static int gprs_subscr_handle_gsup_isd_req(struct gprs_subscr *subscr, - struct osmo_gsup_message *gsup_msg) -{ - struct osmo_gsup_message gsup_reply = {0}; - - gprs_subscr_gsup_insert_data(subscr, gsup_msg); - - subscr->authorized = 1; - subscr->sgsn_data->error_cause = SGSN_ERROR_CAUSE_NONE; - subscr->flags |= GPRS_SUBSCRIBER_ENABLE_PURGE; - gprs_subscr_update(subscr); - - gsup_reply.message_type = OSMO_GSUP_MSGT_INSERT_DATA_RESULT; - return gprs_subscr_tx_gsup_message(subscr, &gsup_reply); -} - -static int check_cause(int cause) -{ - switch (cause) { - case GMM_CAUSE_IMSI_UNKNOWN ... GMM_CAUSE_ILLEGAL_ME: - case GMM_CAUSE_GPRS_NOTALLOWED ... GMM_CAUSE_NO_GPRS_PLMN: - return EACCES; - - case GMM_CAUSE_MSC_TEMP_NOTREACH ... GMM_CAUSE_CONGESTION: - return EHOSTUNREACH; - - case GMM_CAUSE_SEM_INCORR_MSG ... GMM_CAUSE_PROTO_ERR_UNSPEC: - default: - return EINVAL; - } -} - -static int gprs_subscr_handle_gsup_auth_err(struct gprs_subscr *subscr, - struct osmo_gsup_message *gsup_msg) -{ - unsigned idx; - struct sgsn_subscriber_data *sdata = subscr->sgsn_data; - int cause_err; - - cause_err = check_cause(gsup_msg->cause); - - LOGGSUBSCRP(LOGL_DEBUG, subscr, - "Send authentication info has failed with cause %d, " - "handled as: %s\n", - gsup_msg->cause, strerror(cause_err)); - - switch (cause_err) { - case EACCES: - LOGGSUBSCRP(LOGL_NOTICE, subscr, - "GPRS send auth info req failed, access denied, " - "GMM cause = '%s' (%d)\n", - get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), - gsup_msg->cause); - /* Clear auth tuples */ - memset(sdata->auth_triplets, 0, sizeof(sdata->auth_triplets)); - for (idx = 0; idx < ARRAY_SIZE(sdata->auth_triplets); idx++) - sdata->auth_triplets[idx].key_seq = GSM_KEY_SEQ_INVAL; - - subscr->authorized = 0; - sdata->error_cause = gsup_msg->cause; - gprs_subscr_update_auth_info(subscr); - break; - - case EHOSTUNREACH: - LOGGSUBSCRP(LOGL_NOTICE, subscr, - "GPRS send auth info req failed, GMM cause = '%s' (%d)\n", - get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), - gsup_msg->cause); - - sdata->error_cause = gsup_msg->cause; - gprs_subscr_update_auth_info(subscr); - break; - - default: - case EINVAL: - LOGGSUBSCRP(LOGL_ERROR, subscr, - "GSUP protocol remote error, GMM cause = '%s' (%d)\n", - get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), - gsup_msg->cause); - break; - } - - return -gsup_msg->cause; -} - -static int gprs_subscr_handle_gsup_upd_loc_err(struct gprs_subscr *subscr, - struct osmo_gsup_message *gsup_msg) -{ - int cause_err; - - cause_err = check_cause(gsup_msg->cause); - - LOGGSUBSCRP(LOGL_DEBUG, subscr, - "Update location has failed with cause %d, handled as: %s\n", - gsup_msg->cause, strerror(cause_err)); - - switch (cause_err) { - case EACCES: - LOGGSUBSCRP(LOGL_NOTICE, subscr, - "GPRS update location failed, access denied, " - "GMM cause = '%s' (%d)\n", - get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), - gsup_msg->cause); - - subscr->authorized = 0; - subscr->sgsn_data->error_cause = gsup_msg->cause; - gprs_subscr_update_auth_info(subscr); - break; - - case EHOSTUNREACH: - LOGGSUBSCRP(LOGL_NOTICE, subscr, - "GPRS update location failed, GMM cause = '%s' (%d)\n", - get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), - gsup_msg->cause); - - subscr->sgsn_data->error_cause = gsup_msg->cause; - gprs_subscr_update_auth_info(subscr); - break; - - default: - case EINVAL: - LOGGSUBSCRP(LOGL_ERROR, subscr, - "GSUP protocol remote error, GMM cause = '%s' (%d)\n", - get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), - gsup_msg->cause); - break; - } - - return -gsup_msg->cause; -} - -static int gprs_subscr_handle_gsup_purge_no_subscr( - struct osmo_gsup_message *gsup_msg) -{ - if (OSMO_GSUP_IS_MSGT_ERROR(gsup_msg->message_type)) { - LOGGSUPP(LOGL_NOTICE, gsup_msg, - "Purge MS has failed with cause '%s' (%d)\n", - get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), - gsup_msg->cause); - return -gsup_msg->cause; - } - - LOGGSUPP(LOGL_INFO, gsup_msg, "Completing purge MS\n"); - return 0; -} - -static int gprs_subscr_handle_gsup_purge_res(struct gprs_subscr *subscr, - struct osmo_gsup_message *gsup_msg) -{ - LOGGSUBSCRP(LOGL_INFO, subscr, "Completing purge MS\n"); - - /* Force silent cancellation */ - subscr->sgsn_data->error_cause = SGSN_ERROR_CAUSE_NONE; - gprs_subscr_cancel(subscr); - - return 0; -} - -static int gprs_subscr_handle_gsup_purge_err(struct gprs_subscr *subscr, - struct osmo_gsup_message *gsup_msg) -{ - LOGGSUBSCRP(LOGL_NOTICE, subscr, - "Purge MS has failed with cause '%s' (%d)\n", - get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), - gsup_msg->cause); - - /* In GSM 09.02, 19.1.4.4, the text and the SDL diagram imply that - * the subscriber data is not removed if the request has failed. On the - * other hand, keeping the subscriber data in either error case - * (subscriber unknown, syntactical message error, connection error) - * doesn't seem to give any advantage, since the data will be restored - * on the next Attach Request anyway. - * This approach ensures, that the subscriber record will not stick if - * an error happens. - */ - - /* TODO: Check whether this behaviour is acceptable and either just - * remove this TODO-notice or change the implementation to not delete - * the subscriber data (eventually resetting the ENABLE_PURGE flag and - * restarting the expiry timer based on the cause). - * - * Subscriber Unknown: cancel subscr - * Temporary network problems: do nothing (handled by timer based retry) - * Message problems (syntax, nyi, ...): cancel subscr (retry won't help) - */ - - gprs_subscr_handle_gsup_purge_res(subscr, gsup_msg); - - return -gsup_msg->cause; -} - -static int gprs_subscr_handle_loc_cancel_req(struct gprs_subscr *subscr, - struct osmo_gsup_message *gsup_msg) -{ - struct osmo_gsup_message gsup_reply = {0}; - int is_update_procedure = !gsup_msg->cancel_type || - gsup_msg->cancel_type == OSMO_GSUP_CANCEL_TYPE_UPDATE; - - LOGGSUBSCRP(LOGL_INFO, subscr, "Cancelling MS subscriber (%s)\n", - is_update_procedure ? - "update procedure" : "subscription withdraw"); - - gsup_reply.message_type = OSMO_GSUP_MSGT_LOCATION_CANCEL_RESULT; - gprs_subscr_tx_gsup_message(subscr, &gsup_reply); - - if (is_update_procedure) - subscr->sgsn_data->error_cause = SGSN_ERROR_CAUSE_NONE; - else - /* Since a withdraw cause is not specified, just abort the - * current attachment. The following re-attachment should then - * be rejected with a proper cause value. - */ - subscr->sgsn_data->error_cause = GMM_CAUSE_IMPL_DETACHED; - - gprs_subscr_cancel(subscr); - - return 0; -} - -static int gprs_subscr_handle_unknown_imsi(struct osmo_gsup_message *gsup_msg) -{ - if (OSMO_GSUP_IS_MSGT_REQUEST(gsup_msg->message_type)) { - gprs_subscr_tx_gsup_error_reply(NULL, gsup_msg, - GMM_CAUSE_IMSI_UNKNOWN); - LOGP(DGPRS, LOGL_NOTICE, - "Unknown IMSI %s, discarding GSUP request " - "of type 0x%02x\n", - gsup_msg->imsi, gsup_msg->message_type); - } else if (OSMO_GSUP_IS_MSGT_ERROR(gsup_msg->message_type)) { - LOGP(DGPRS, LOGL_NOTICE, - "Unknown IMSI %s, discarding GSUP error " - "of type 0x%02x, cause '%s' (%d)\n", - gsup_msg->imsi, gsup_msg->message_type, - get_value_string(gsm48_gmm_cause_names, gsup_msg->cause), - gsup_msg->cause); - } else { - LOGP(DGPRS, LOGL_NOTICE, - "Unknown IMSI %s, discarding GSUP response " - "of type 0x%02x\n", - gsup_msg->imsi, gsup_msg->message_type); - } - - return -GMM_CAUSE_IMSI_UNKNOWN; -} - -int gprs_subscr_rx_gsup_message(struct msgb *msg) -{ - uint8_t *data = msgb_l2(msg); - size_t data_len = msgb_l2len(msg); - int rc = 0; - - struct osmo_gsup_message gsup_msg = {0}; - struct gprs_subscr *subscr; - - rc = osmo_gsup_decode(data, data_len, &gsup_msg); - if (rc < 0) { - LOGP(DGPRS, LOGL_ERROR, - "decoding GSUP message fails with error '%s' (%d)\n", - get_value_string(gsm48_gmm_cause_names, -rc), -rc); - return rc; - } - - if (!gsup_msg.imsi[0]) { - LOGP(DGPRS, LOGL_ERROR, "Missing IMSI in GSUP message\n"); - - if (OSMO_GSUP_IS_MSGT_REQUEST(gsup_msg.message_type)) - gprs_subscr_tx_gsup_error_reply(NULL, &gsup_msg, - GMM_CAUSE_INV_MAND_INFO); - return -GMM_CAUSE_INV_MAND_INFO; - } - - if (!gsup_msg.cause && OSMO_GSUP_IS_MSGT_ERROR(gsup_msg.message_type)) - gsup_msg.cause = GMM_CAUSE_NET_FAIL; - - subscr = gprs_subscr_get_by_imsi(gsup_msg.imsi); - - if (!subscr) { - switch (gsup_msg.message_type) { - case OSMO_GSUP_MSGT_PURGE_MS_RESULT: - case OSMO_GSUP_MSGT_PURGE_MS_ERROR: - return gprs_subscr_handle_gsup_purge_no_subscr(&gsup_msg); - default: - return gprs_subscr_handle_unknown_imsi(&gsup_msg); - } - } - - LOGGSUBSCRP(LOGL_INFO, subscr, - "Received GSUP message %s\n", - osmo_gsup_message_type_name(gsup_msg.message_type)); - - switch (gsup_msg.message_type) { - case OSMO_GSUP_MSGT_LOCATION_CANCEL_REQUEST: - rc = gprs_subscr_handle_loc_cancel_req(subscr, &gsup_msg); - break; - - case OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: - rc = gprs_subscr_handle_gsup_auth_res(subscr, &gsup_msg); - break; - - case OSMO_GSUP_MSGT_SEND_AUTH_INFO_ERROR: - rc = gprs_subscr_handle_gsup_auth_err(subscr, &gsup_msg); - break; - - case OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: - rc = gprs_subscr_handle_gsup_upd_loc_res(subscr, &gsup_msg); - break; - - case OSMO_GSUP_MSGT_UPDATE_LOCATION_ERROR: - rc = gprs_subscr_handle_gsup_upd_loc_err(subscr, &gsup_msg); - break; - - case OSMO_GSUP_MSGT_PURGE_MS_ERROR: - rc = gprs_subscr_handle_gsup_purge_err(subscr, &gsup_msg); - break; - - case OSMO_GSUP_MSGT_PURGE_MS_RESULT: - rc = gprs_subscr_handle_gsup_purge_res(subscr, &gsup_msg); - break; - - case OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: - rc = gprs_subscr_handle_gsup_isd_req(subscr, &gsup_msg); - break; - - case OSMO_GSUP_MSGT_DELETE_DATA_REQUEST: - rc = gprs_subscr_handle_gsup_dsd_req(subscr, &gsup_msg); - break; - - default: - LOGGSUBSCRP(LOGL_ERROR, subscr, - "Rx GSUP message %s not valid at SGSN\n", - osmo_gsup_message_type_name(gsup_msg.message_type)); - if (OSMO_GSUP_IS_MSGT_REQUEST(gsup_msg.message_type)) - gprs_subscr_tx_gsup_error_reply( - subscr, &gsup_msg, GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL); - rc = -GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL; - break; - }; - - gprs_subscr_put(subscr); - - return rc; -} - -int gprs_subscr_purge(struct gprs_subscr *subscr) -{ - struct sgsn_subscriber_data *sdata = subscr->sgsn_data; - struct osmo_gsup_message gsup_msg = {0}; - - LOGGSUBSCRP(LOGL_INFO, subscr, "purging MS subscriber\n"); - - gsup_msg.message_type = OSMO_GSUP_MSGT_PURGE_MS_REQUEST; - - /* Provide the HLR number in case it is known */ - gsup_msg.hlr_enc_len = sdata->hlr_len; - gsup_msg.hlr_enc = sdata->hlr; - - return gprs_subscr_tx_gsup_message(subscr, &gsup_msg); -} - -static int gprs_subscr_query_auth_info(struct gprs_subscr *subscr, - const uint8_t *auts, - const uint8_t *auts_rand) -{ - struct osmo_gsup_message gsup_msg = {0}; - - /* Make sure we have a complete resync or clearly no resync. */ - OSMO_ASSERT((auts != NULL) == (auts_rand != NULL)); - - LOGGSUBSCRP(LOGL_INFO, subscr, "requesting auth info%s\n", - auts ? " with AUTS (UMTS Resynch)" : ""); - - gsup_msg.message_type = OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST; - gsup_msg.auts = auts; - gsup_msg.rand = auts_rand; - return gprs_subscr_tx_gsup_message(subscr, &gsup_msg); -} - -int gprs_subscr_location_update(struct gprs_subscr *subscr) -{ - struct osmo_gsup_message gsup_msg = {0}; - - LOGGSUBSCRP(LOGL_INFO, subscr, - "subscriber data is not available\n"); - - gsup_msg.message_type = OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST; - return gprs_subscr_tx_gsup_message(subscr, &gsup_msg); -} - -void gprs_subscr_update(struct gprs_subscr *subscr) -{ - LOGGSUBSCRP(LOGL_DEBUG, subscr, "Updating subscriber data\n"); - - subscr->flags &= ~GPRS_SUBSCRIBER_UPDATE_LOCATION_PENDING; - subscr->flags &= ~GPRS_SUBSCRIBER_FIRST_CONTACT; - - if (subscr->sgsn_data->mm) - sgsn_update_subscriber_data(subscr->sgsn_data->mm); -} - -void gprs_subscr_update_auth_info(struct gprs_subscr *subscr) -{ - LOGGSUBSCRP(LOGL_DEBUG, subscr, - "Updating subscriber authentication info\n"); - - subscr->flags &= ~GPRS_SUBSCRIBER_UPDATE_AUTH_INFO_PENDING; - subscr->flags &= ~GPRS_SUBSCRIBER_FIRST_CONTACT; - - if (subscr->sgsn_data->mm) - sgsn_update_subscriber_data(subscr->sgsn_data->mm); -} - -struct gprs_subscr *gprs_subscr_get_or_create_by_mmctx(struct sgsn_mm_ctx *mmctx) -{ - struct gprs_subscr *subscr = NULL; - - if (mmctx->subscr) - return gprs_subscr_get(mmctx->subscr); - - if (mmctx->imsi[0]) - subscr = gprs_subscr_get_by_imsi(mmctx->imsi); - - if (!subscr) { - subscr = gprs_subscr_get_or_create(mmctx->imsi); - subscr->flags |= GPRS_SUBSCRIBER_FIRST_CONTACT; - subscr->flags &= ~GPRS_SUBSCRIBER_ENABLE_PURGE; - } - - osmo_strlcpy(subscr->imei, mmctx->imei, sizeof(subscr->imei)); - - if (subscr->lac != mmctx->ra.lac) - subscr->lac = mmctx->ra.lac; - - subscr->sgsn_data->mm = mmctx; - mmctx->subscr = gprs_subscr_get(subscr); - - return subscr; -} - -int gprs_subscr_request_update_location(struct sgsn_mm_ctx *mmctx) -{ - struct gprs_subscr *subscr = NULL; - int rc; - - LOGMMCTXP(LOGL_DEBUG, mmctx, "Requesting subscriber data update\n"); - - subscr = gprs_subscr_get_or_create_by_mmctx(mmctx); - - subscr->flags |= GPRS_SUBSCRIBER_UPDATE_LOCATION_PENDING; - - rc = gprs_subscr_location_update(subscr); - gprs_subscr_put(subscr); - return rc; -} - -/*! \brief Send Update Auth Info request via GSUP, with or without resync. - * \param[in] mmctx MM context to request authentication tuples for. - * \param[in] auts 14 octet AUTS token for UMTS resync, or NULL. - * \param[in] auts_rand 16 octet Random token for UMTS resync, or NULL. - * In case of normal Authentication Info request, both \a auts and \a auts_rand - * must be NULL. For resync, both must be non-NULL. - */ -int gprs_subscr_request_auth_info(struct sgsn_mm_ctx *mmctx, - const uint8_t *auts, - const uint8_t *auts_rand) -{ - struct gprs_subscr *subscr = NULL; - int rc; - - LOGMMCTXP(LOGL_DEBUG, mmctx, "Requesting subscriber authentication info\n"); - - subscr = gprs_subscr_get_or_create_by_mmctx(mmctx); - - subscr->flags |= GPRS_SUBSCRIBER_UPDATE_AUTH_INFO_PENDING; - - rc = gprs_subscr_query_auth_info(subscr, auts, auts_rand); - gprs_subscr_put(subscr); - return rc; -} - -static void gprs_subscr_free(struct gprs_subscr *gsub) -{ - llist_del(&gsub->entry); - talloc_free(gsub); -} - -struct gprs_subscr *_gprs_subscr_get(struct gprs_subscr *gsub, - const char *file, int line) -{ - OSMO_ASSERT(gsub->use_count < INT_MAX); - gsub->use_count++; - LOGPSRC(DREF, LOGL_DEBUG, file, line, - "subscr %s usage increases to: %d\n", - gsub->imsi, gsub->use_count); - return gsub; -} - -struct gprs_subscr *_gprs_subscr_put(struct gprs_subscr *gsub, - const char *file, int line) -{ - gsub->use_count--; - LOGPSRC(DREF, gsub->use_count >= 0? LOGL_DEBUG : LOGL_ERROR, - file, line, - "subscr %s usage decreases to: %d%s\n", - gsub->imsi, gsub->use_count, - gsub->keep_in_ram? ", keep-in-ram flag is set" : ""); - if (gsub->use_count > 0) - return gsub; - if (gsub->keep_in_ram) - return gsub; - gprs_subscr_free(gsub); - return NULL; -} diff --git a/openbsc/src/gprs/gprs_utils.c b/openbsc/src/gprs/gprs_utils.c deleted file mode 100644 index 91a09d2db..000000000 --- a/openbsc/src/gprs/gprs_utils.c +++ /dev/null @@ -1,246 +0,0 @@ -/* GPRS utility functions */ - -/* (C) 2010 by Harald Welte <laforge@gnumonks.org> - * (C) 2010-2014 by On-Waves - * (C) 2013 by Holger Hans Peter Freyther - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ -#include <openbsc/gprs_utils.h> - -#include <osmocom/core/msgb.h> -#include <osmocom/gprs/gprs_ns.h> - -#include <osmocom/gsm/protocol/gsm_04_08_gprs.h> -#include <osmocom/gsm/protocol/gsm_04_08.h> -#include <osmocom/gsm/gsm48.h> - -#include <string.h> - -/* FIXME: this needs to go to libosmocore/msgb.c */ -struct msgb *gprs_msgb_copy(const struct msgb *msg, const char *name) -{ - struct libgb_msgb_cb *old_cb, *new_cb; - struct msgb *new_msg; - - new_msg = msgb_alloc(msg->data_len, name); - if (!new_msg) - return NULL; - - /* copy data */ - memcpy(new_msg->_data, msg->_data, new_msg->data_len); - - /* copy header */ - new_msg->len = msg->len; - new_msg->data += msg->data - msg->_data; - new_msg->head += msg->head - msg->_data; - new_msg->tail += msg->tail - msg->_data; - - if (msg->l1h) - new_msg->l1h = new_msg->_data + (msg->l1h - msg->_data); - if (msg->l2h) - new_msg->l2h = new_msg->_data + (msg->l2h - msg->_data); - if (msg->l3h) - new_msg->l3h = new_msg->_data + (msg->l3h - msg->_data); - if (msg->l4h) - new_msg->l4h = new_msg->_data + (msg->l4h - msg->_data); - - /* copy GB specific data */ - old_cb = LIBGB_MSGB_CB(msg); - new_cb = LIBGB_MSGB_CB(new_msg); - - if (old_cb->bssgph) - new_cb->bssgph = new_msg->_data + (old_cb->bssgph - msg->_data); - if (old_cb->llch) - new_cb->llch = new_msg->_data + (old_cb->llch - msg->_data); - - /* bssgp_cell_id is a pointer into the old msgb, so we need to make - * it a pointer into the new msgb */ - if (old_cb->bssgp_cell_id) - new_cb->bssgp_cell_id = new_msg->_data + - (old_cb->bssgp_cell_id - msg->_data); - new_cb->nsei = old_cb->nsei; - new_cb->bvci = old_cb->bvci; - new_cb->tlli = old_cb->tlli; - - return new_msg; -} - -/* TODO: Move this to libosmocore/msgb.c */ -int gprs_msgb_resize_area(struct msgb *msg, uint8_t *area, - size_t old_size, size_t new_size) -{ - int rc; - uint8_t *rest = area + old_size; - int rest_len = msg->len - old_size - (area - msg->data); - int delta_size = (int)new_size - (int)old_size; - - if (delta_size == 0) - return 0; - - if (delta_size > 0) { - rc = msgb_trim(msg, msg->len + delta_size); - if (rc < 0) - return rc; - } - - memmove(area + new_size, area + old_size, rest_len); - - if (msg->l1h >= rest) - msg->l1h += delta_size; - if (msg->l2h >= rest) - msg->l2h += delta_size; - if (msg->l3h >= rest) - msg->l3h += delta_size; - if (msg->l4h >= rest) - msg->l4h += delta_size; - - if (delta_size < 0) - msgb_trim(msg, msg->len + delta_size); - - return 0; -} - -int gprs_str_to_apn(uint8_t *apn_enc, size_t max_len, const char *str) -{ - uint8_t *last_len_field; - int len; - - /* Can we even write the length field to the output? */ - if (max_len == 0) - return -1; - - /* Remember where we need to put the length once we know it */ - last_len_field = apn_enc; - len = 1; - apn_enc += 1; - - while (str[0]) { - if (len >= max_len) - return -1; - - if (str[0] == '.') { - *last_len_field = (apn_enc - last_len_field) - 1; - last_len_field = apn_enc; - } else { - *apn_enc = str[0]; - } - apn_enc += 1; - str += 1; - len += 1; - } - - *last_len_field = (apn_enc - last_len_field) - 1; - - return len; -} - -/* GSM 04.08, 10.5.7.3 GPRS Timer */ -int gprs_tmr_to_secs(uint8_t tmr) -{ - switch (tmr & GPRS_TMR_UNIT_MASK) { - case GPRS_TMR_2SECONDS: - return 2 * (tmr & GPRS_TMR_FACT_MASK); - default: - case GPRS_TMR_MINUTE: - return 60 * (tmr & GPRS_TMR_FACT_MASK); - case GPRS_TMR_6MINUTE: - return 360 * (tmr & GPRS_TMR_FACT_MASK); - case GPRS_TMR_DEACTIVATED: - return -1; - } -} - -/* This functions returns a tmr value such that - * - f is monotonic - * - f(s) <= s - * - f(s) == s if a tmr exists with s = gprs_tmr_to_secs(tmr) - * - the best possible resolution is used - * where - * f(s) = gprs_tmr_to_secs(gprs_secs_to_tmr_floor(s)) - */ -uint8_t gprs_secs_to_tmr_floor(int secs) -{ - if (secs < 0) - return GPRS_TMR_DEACTIVATED; - if (secs < 2 * 32) - return GPRS_TMR_2SECONDS | (secs / 2); - if (secs < 60 * 2) - /* Ensure monotonicity */ - return GPRS_TMR_2SECONDS | GPRS_TMR_FACT_MASK; - if (secs < 60 * 32) - return GPRS_TMR_MINUTE | (secs / 60); - if (secs < 360 * 6) - /* Ensure monotonicity */ - return GPRS_TMR_MINUTE | GPRS_TMR_FACT_MASK; - if (secs < 360 * 32) - return GPRS_TMR_6MINUTE | (secs / 360); - - return GPRS_TMR_6MINUTE | GPRS_TMR_FACT_MASK; -} - -/* GSM 04.08, 10.5.1.4 */ -int gprs_is_mi_tmsi(const uint8_t *value, size_t value_len) -{ - if (value_len != GSM48_TMSI_LEN) - return 0; - - if (!value || (value[0] & GSM_MI_TYPE_MASK) != GSM_MI_TYPE_TMSI) - return 0; - - return 1; -} - -/* GSM 04.08, 10.5.1.4 */ -int gprs_is_mi_imsi(const uint8_t *value, size_t value_len) -{ - if (value_len == 0) - return 0; - - if (!value || (value[0] & GSM_MI_TYPE_MASK) != GSM_MI_TYPE_IMSI) - return 0; - - return 1; -} - -int gprs_parse_mi_tmsi(const uint8_t *value, size_t value_len, uint32_t *tmsi) -{ - uint32_t tmsi_be; - - if (!gprs_is_mi_tmsi(value, value_len)) - return 0; - - memcpy(&tmsi_be, value + 1, sizeof(tmsi_be)); - - *tmsi = ntohl(tmsi_be); - return 1; -} - -void gprs_parse_tmsi(const uint8_t *value, uint32_t *tmsi) -{ - uint32_t tmsi_be; - - memcpy(&tmsi_be, value, sizeof(tmsi_be)); - - *tmsi = ntohl(tmsi_be); -} - -int gprs_ra_id_equals(const struct gprs_ra_id *id1, - const struct gprs_ra_id *id2) -{ - return (id1->mcc == id2->mcc && id1->mnc == id2->mnc && - id1->lac == id2->lac && id1->rac == id2->rac); -} diff --git a/openbsc/src/gprs/gtphub.c b/openbsc/src/gprs/gtphub.c deleted file mode 100644 index 0a8e375ab..000000000 --- a/openbsc/src/gprs/gtphub.c +++ /dev/null @@ -1,2937 +0,0 @@ -/* GTP Hub Implementation */ - -/* (C) 2015 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> - * All Rights Reserved - * - * Author: Neels Hofmeyr - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <string.h> -#include <errno.h> -#include <inttypes.h> -#include <time.h> -#include <limits.h> -#include <unistd.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <arpa/inet.h> - -#include <gtp.h> -#include <gtpie.h> - -#include <openbsc/gtphub.h> -#include <openbsc/debug.h> -#include <openbsc/gprs_utils.h> - -#include <osmocom/core/utils.h> -#include <osmocom/core/logging.h> -#include <osmocom/core/socket.h> -#include <osmocom/core/rate_ctr.h> -#include <osmocom/core/stats.h> - -#include <osmocom/gsm/apn.h> - - -static const int GTPH_GC_TICK_SECONDS = 1; - -void *osmo_gtphub_ctx; - -/* Convenience makro, note: only within this C file. */ -#define LOG(level, fmt, args...) \ - LOGP(DGTPHUB, level, fmt, ##args) - -#define ZERO_STRUCT(struct_pointer) memset(struct_pointer, '\0', \ - sizeof(*(struct_pointer))) - -/* TODO move this to osmocom/core/select.h ? */ -typedef int (*osmo_fd_cb_t)(struct osmo_fd *fd, unsigned int what); - -/* TODO move this to osmocom/core/linuxlist.h ? */ -#define __llist_first(head) (((head)->next == (head)) ? NULL : (head)->next) -#define llist_first(head, type, entry) \ - llist_entry(__llist_first(head), type, entry) - -#define __llist_last(head) (((head)->next == (head)) ? NULL : (head)->prev) -#define llist_last(head, type, entry) \ - llist_entry(__llist_last(head), type, entry) - -/* TODO move GTP header stuff to openggsn/gtp/ ? See gtp_decaps*() */ - -enum gtp_rc { - GTP_RC_UNKNOWN = 0, - GTP_RC_TINY = 1, /* no IEs (like ping/pong) */ - GTP_RC_PDU_C = 2, /* a real packet with IEs */ - GTP_RC_PDU_U = 3, /* a real packet with User data */ - - GTP_RC_TOOSHORT = -1, - GTP_RC_UNSUPPORTED_VERSION = -2, - GTP_RC_INVALID_IE = -3, -}; - -struct gtp_packet_desc { - union gtp_packet *data; - int data_len; - int header_len; - int version; - uint8_t type; - uint16_t seq; - uint32_t header_tei_rx; - uint32_t header_tei; - int rc; /* enum gtp_rc */ - unsigned int plane_idx; - unsigned int side_idx; - struct gtphub_tunnel *tun; - time_t timestamp; - union gtpie_member *ie[GTPIE_SIZE]; -}; - -struct pending_delete { - struct llist_head entry; - struct expiring_item expiry_entry; - - struct gtphub_tunnel *tun; - uint8_t teardown_ind; - uint8_t nsapi; -}; - - -/* counters */ - -enum gtphub_counters_io { - GTPH_CTR_PKTS_IN = 0, - GTPH_CTR_PKTS_OUT, - GTPH_CTR_BYTES_IN, - GTPH_CTR_BYTES_OUT -}; - -static const struct rate_ctr_desc gtphub_counters_io_desc[] = { - { "packets.in", "Packets ( In)" }, - { "packets.out", "Packets (Out)" }, - { "bytes.in", "Bytes ( In)" }, - { "bytes.out", "Bytes (Out)" }, -}; - -static const struct rate_ctr_group_desc gtphub_ctrg_io_desc = { - .group_name_prefix = "gtphub.bind", - .group_description = "I/O Statistics", - .num_ctr = ARRAY_SIZE(gtphub_counters_io_desc), - .ctr_desc = gtphub_counters_io_desc, - .class_id = OSMO_STATS_CLASS_GLOBAL, -}; - - -/* support */ - -static const char *gtp_type_str(uint8_t type) -{ - switch (type) { - case 1: - return " (Echo Request)"; - case 2: - return " (Echo Response)"; - case 16: - return " (Create PDP Ctx Request)"; - case 17: - return " (Create PDP Ctx Response)"; - case 18: - return " (Update PDP Ctx Request)"; - case 19: - return " (Update PDP Ctx Response)"; - case 20: - return " (Delete PDP Ctx Request)"; - case 21: - return " (Delete PDP Ctx Response)"; - case 255: - return " (User Data)"; - default: - return ""; - } -} - -void gsn_addr_copy(struct gsn_addr *gsna, const struct gsn_addr *src) -{ - *gsna = *src; -} - -int gsn_addr_from_sockaddr(struct gsn_addr *gsna, uint16_t *port, - const struct osmo_sockaddr *sa) -{ - char addr_str[256]; - char port_str[6]; - - if (osmo_sockaddr_to_strs(addr_str, sizeof(addr_str), - port_str, sizeof(port_str), - sa, (NI_NUMERICHOST | NI_NUMERICSERV)) - != 0) { - return -1; - } - - if (port) - *port = atoi(port_str); - - return gsn_addr_from_str(gsna, addr_str); -} - -int gsn_addr_from_str(struct gsn_addr *gsna, const char *numeric_addr_str) -{ - if ((!gsna) || (!numeric_addr_str)) - return -1; - - int af = AF_INET; - gsna->len = 4; - const char *pos = numeric_addr_str; - for (; *pos; pos++) { - if (*pos == ':') { - af = AF_INET6; - gsna->len = 16; - break; - } - } - - int rc = inet_pton(af, numeric_addr_str, gsna->buf); - if (rc != 1) { - LOG(LOGL_ERROR, "Cannot resolve numeric address: '%s'\n", - numeric_addr_str); - return -1; - } - return 0; -} - -const char *gsn_addr_to_str(const struct gsn_addr *gsna) -{ - static char buf[INET6_ADDRSTRLEN + 1]; - return gsn_addr_to_strb(gsna, buf, sizeof(buf)); -} - -const char *gsn_addr_to_strb(const struct gsn_addr *gsna, - char *strbuf, - int strbuf_len) -{ - int af; - switch (gsna->len) { - case 4: - af = AF_INET; - break; - case 16: - af = AF_INET6; - break; - default: - return NULL; - } - - const char *r = inet_ntop(af, gsna->buf, strbuf, strbuf_len); - if (!r) { - LOG(LOGL_ERROR, "Cannot convert gsn_addr to string:" - " %s: len=%d, buf=%s\n", - strerror(errno), - (int)gsna->len, - osmo_hexdump(gsna->buf, sizeof(gsna->buf))); - } - return r; -} - -int gsn_addr_same(const struct gsn_addr *a, const struct gsn_addr *b) -{ - if (a == b) - return 1; - if ((!a) || (!b)) - return 0; - if (a->len != b->len) - return 0; - return (memcmp(a->buf, b->buf, a->len) == 0)? 1 : 0; -} - -static int gsn_addr_get(struct gsn_addr *gsna, const struct gtp_packet_desc *p, - int idx) -{ - if (p->rc != GTP_RC_PDU_C) - return -1; - - unsigned int len; - /* gtpie.h fails to declare gtpie_gettlv()'s first arg as const. */ - if (gtpie_gettlv((union gtpie_member**)p->ie, GTPIE_GSN_ADDR, idx, - &len, gsna->buf, sizeof(gsna->buf)) - != 0) - return -1; - gsna->len = len; - return 0; -} - -static int gsn_addr_put(const struct gsn_addr *gsna, struct gtp_packet_desc *p, - int idx) -{ - if (p->rc != GTP_RC_PDU_C) - return -1; - - int ie_idx; - ie_idx = gtpie_getie(p->ie, GTPIE_GSN_ADDR, idx); - - if (ie_idx < 0) - return -1; - - struct gtpie_tlv *ie = &p->ie[ie_idx]->tlv; - int ie_l = ntoh16(ie->l); - if (ie_l != gsna->len) { - LOG(LOGL_ERROR, "Not implemented:" - " replace an IE address of different size:" - " replace %d with %d\n", (int)ie_l, (int)gsna->len); - return -1; - } - - memcpy(ie->v, gsna->buf, (int)ie_l); - return 0; -} - -/* Validate GTP version 0 data; analogous to validate_gtp1_header(), see there. - */ -void validate_gtp0_header(struct gtp_packet_desc *p) -{ - const struct gtp0_header *pheader = &(p->data->gtp0.h); - p->rc = GTP_RC_UNKNOWN; - p->header_len = 0; - - OSMO_ASSERT(p->data_len >= 1); - OSMO_ASSERT(p->version == 0); - - if (p->data_len < GTP0_HEADER_SIZE) { - LOG(LOGL_ERROR, "GTP0 packet too short: %d\n", p->data_len); - p->rc = GTP_RC_TOOSHORT; - return; - } - - p->type = ntoh8(pheader->type); - p->seq = ntoh16(pheader->seq); - p->header_tei_rx = 0; /* TODO */ - p->header_tei = p->header_tei_rx; - - if (p->data_len == GTP0_HEADER_SIZE) { - p->rc = GTP_RC_TINY; - p->header_len = GTP0_HEADER_SIZE; - return; - } - - /* Check packet length field versus length of packet */ - if (p->data_len != (ntoh16(pheader->length) + GTP0_HEADER_SIZE)) { - LOG(LOGL_ERROR, "GTP packet length field (%d + %d) does not" - " match actual length (%d)\n", - GTP0_HEADER_SIZE, (int)ntoh16(pheader->length), - p->data_len); - p->rc = GTP_RC_TOOSHORT; - return; - } - - LOG(LOGL_DEBUG, "GTP v0 TID = %" PRIu64 "\n", pheader->tid); - p->header_len = GTP0_HEADER_SIZE; - p->rc = GTP_RC_PDU_C; -} - -/* Validate GTP version 1 data, and update p->rc with the result, as well as - * p->header_len in case of a valid header. */ -void validate_gtp1_header(struct gtp_packet_desc *p) -{ - const struct gtp1_header_long *pheader = &(p->data->gtp1l.h); - p->rc = GTP_RC_UNKNOWN; - p->header_len = 0; - - OSMO_ASSERT(p->data_len >= 1); - OSMO_ASSERT(p->version == 1); - - if ((p->data_len < GTP1_HEADER_SIZE_LONG) - && (p->data_len != GTP1_HEADER_SIZE_SHORT)){ - LOG(LOGL_ERROR, "GTP packet too short: %d\n", p->data_len); - p->rc = GTP_RC_TOOSHORT; - return; - } - - p->type = ntoh8(pheader->type); - p->header_tei_rx = ntoh32(pheader->tei); - p->header_tei = p->header_tei_rx; - p->seq = ntoh16(pheader->seq); - - LOG(LOGL_DEBUG, "| GTPv1\n"); - LOG(LOGL_DEBUG, "| type = %" PRIu8 " 0x%02" PRIx8 "\n", p->type, p->type); - LOG(LOGL_DEBUG, "| length = %" PRIu16 " 0x%04" PRIx16 "\n", ntoh16(pheader->length), ntoh16(pheader->length)); - LOG(LOGL_DEBUG, "| TEI = %" PRIu32 " 0x%08" PRIx32 "\n", p->header_tei_rx, p->header_tei_rx); - LOG(LOGL_DEBUG, "| seq = %" PRIu16 " 0x%04" PRIx16 "\n", p->seq, p->seq); - LOG(LOGL_DEBUG, "| npdu = %" PRIu8 " 0x%02" PRIx8 "\n", pheader->npdu, pheader->npdu); - LOG(LOGL_DEBUG, "| next = %" PRIu8 " 0x%02" PRIx8 "\n", pheader->next, pheader->next); - - if (p->data_len <= GTP1_HEADER_SIZE_LONG) { - p->rc = GTP_RC_TINY; - p->header_len = GTP1_HEADER_SIZE_SHORT; - return; - } - - /* Check packet length field versus length of packet */ - int announced_len = ntoh16(pheader->length) + GTP1_HEADER_SIZE_SHORT; - if (p->data_len != announced_len) { - LOG(LOGL_ERROR, "GTP packet length field (%d + %d) does not" - " match actual length (%d)\n", - GTP1_HEADER_SIZE_SHORT, (int)ntoh16(pheader->length), - p->data_len); - p->rc = GTP_RC_TOOSHORT; - return; - } - - p->rc = GTP_RC_PDU_C; - p->header_len = GTP1_HEADER_SIZE_LONG; -} - -/* Examine whether p->data of size p->data_len has a valid GTP header. Set - * p->version, p->rc and p->header_len. On error, p->rc <= 0 (see enum - * gtp_rc). p->data must point at a buffer with p->data_len set. */ -void validate_gtp_header(struct gtp_packet_desc *p) -{ - p->rc = GTP_RC_UNKNOWN; - - /* Need at least 1 byte in order to check version */ - if (p->data_len < 1) { - LOG(LOGL_ERROR, "Discarding packet - too small: %d\n", - p->data_len); - p->rc = GTP_RC_TOOSHORT; - return; - } - - p->version = p->data->flags >> 5; - - switch (p->version) { - case 0: - validate_gtp0_header(p); - break; - case 1: - validate_gtp1_header(p); - break; - default: - LOG(LOGL_ERROR, "Unsupported GTP version: %d\n", p->version); - p->rc = GTP_RC_UNSUPPORTED_VERSION; - break; - } -} - - -/* Return the value of the i'th IMSI IEI by copying to *imsi. - * The first IEI is reached by passing i = 0. - * imsi must point at allocated space of (at least) 8 bytes. - * Return 1 on success, or 0 if not found. */ -static int get_ie_imsi(union gtpie_member *ie[], int i, uint8_t *imsi) -{ - return gtpie_gettv0(ie, GTPIE_IMSI, i, imsi, 8) == 0; -} - -/* Analogous to get_ie_imsi(). nsapi must point at a single uint8_t. */ -static int get_ie_nsapi(union gtpie_member *ie[], int i, uint8_t *nsapi) -{ - return gtpie_gettv1(ie, GTPIE_NSAPI, i, nsapi) == 0; -} - -static char imsi_digit_to_char(uint8_t nibble) -{ - nibble &= 0x0f; - if (nibble > 9) - return (nibble == 0x0f) ? '\0' : '?'; - return '0' + nibble; -} - -/* Return a human readable IMSI string, in a static buffer. - * imsi must point at 8 octets of IMSI IE encoded IMSI data. */ -static int imsi_to_str(uint8_t *imsi, const char **imsi_str) -{ - static char str[17]; - int i; - - for (i = 0; i < 8; i++) { - char c; - c = imsi_digit_to_char(imsi[i]); - if (c == '?') - return -1; - str[2*i] = c; - - c = imsi_digit_to_char(imsi[i] >> 4); - if (c == '?') - return -1; - str[2*i + 1] = c; - } - str[16] = '\0'; - *imsi_str = str; - return 1; -} - -/* Return 0 if not present, 1 if present and decoded successfully, -1 if - * present but cannot be decoded. */ -static int get_ie_imsi_str(union gtpie_member *ie[], int i, - const char **imsi_str) -{ - uint8_t imsi_buf[8]; - if (!get_ie_imsi(ie, i, imsi_buf)) - return 0; - return imsi_to_str(imsi_buf, imsi_str); -} - -/* Return 0 if not present, 1 if present and decoded successfully, -1 if - * present but cannot be decoded. */ -static int get_ie_apn_str(union gtpie_member *ie[], const char **apn_str) -{ - static char apn_buf[GSM_APN_LENGTH]; - unsigned int len; - if (gtpie_gettlv(ie, GTPIE_APN, 0, - &len, apn_buf, sizeof(apn_buf)) != 0) - return 0; - - if (len < 2) { - LOG(LOGL_ERROR, "APN IE: invalid length: %d\n", - (int)len); - return -1; - } - - if (len > (sizeof(apn_buf) - 1)) - len = sizeof(apn_buf) - 1; - apn_buf[len] = '\0'; - - *apn_str = osmo_apn_to_str(apn_buf, (uint8_t*)apn_buf, len); - if (!(*apn_str)) { - LOG(LOGL_ERROR, "APN IE: present but cannot be decoded: %s\n", - osmo_hexdump((uint8_t*)apn_buf, len)); - return -1; - } - return 1; -} - - -/* Validate header, and index information elements. Write decoded packet - * information to *res. res->data will point at the given data buffer. On - * error, p->rc is set <= 0 (see enum gtp_rc). */ -static void gtp_decode(const uint8_t *data, int data_len, - unsigned int from_side_idx, - unsigned int from_plane_idx, - struct gtp_packet_desc *res, - time_t now) -{ - ZERO_STRUCT(res); - res->data = (union gtp_packet*)data; - res->data_len = data_len; - res->side_idx = from_side_idx; - res->plane_idx = from_plane_idx; - res->timestamp = now; - - validate_gtp_header(res); - - if (res->rc <= 0) - return; - - LOG(LOGL_DEBUG, "Valid GTP header (v%d)\n", res->version); - - if (from_plane_idx == GTPH_PLANE_USER) { - res->rc = GTP_RC_PDU_U; - return; - } - - if (res->rc != GTP_RC_PDU_C) { - LOG(LOGL_DEBUG, "no IEs in this GTP packet\n"); - return; - } - - if (gtpie_decaps(res->ie, res->version, - (void*)(data + res->header_len), - res->data_len - res->header_len) != 0) { - res->rc = GTP_RC_INVALID_IE; - LOG(LOGL_ERROR, "INVALID: cannot decode IEs." - " Dropping GTP packet%s.\n", - gtp_type_str(res->type) - ); - return; - } - -#if 1 - /* TODO if (<loglevel is debug>) - (waiting for a commit from jerlbeck) */ - int i; - - for (i = 0; i < 10; i++) { - const char *imsi; - if (get_ie_imsi_str(res->ie, i, &imsi) < 1) - break; - LOG(LOGL_DEBUG, "| IMSI %s\n", imsi); - } - - for (i = 0; i < 10; i++) { - uint8_t nsapi; - if (!get_ie_nsapi(res->ie, i, &nsapi)) - break; - LOG(LOGL_DEBUG, "| NSAPI %d\n", (int)nsapi); - } - - for (i = 0; i < 2; i++) { - struct gsn_addr addr; - if (gsn_addr_get(&addr, res, i) == 0) - LOG(LOGL_DEBUG, "| addr %s\n", gsn_addr_to_str(&addr)); - } - - for (i = 0; i < 10; i++) { - uint32_t tei; - if (gtpie_gettv4(res->ie, GTPIE_TEI_DI, i, &tei) != 0) - break; - LOG(LOGL_DEBUG, "| TEI DI (USER) %" PRIu32 " 0x%08" PRIx32 "\n", - tei, tei); - } - - for (i = 0; i < 10; i++) { - uint32_t tei; - if (gtpie_gettv4(res->ie, GTPIE_TEI_C, i, &tei) != 0) - break; - LOG(LOGL_DEBUG, "| TEI (CTRL) %" PRIu32 " 0x%08" PRIx32 "\n", - tei, tei); - } -#endif -} - - -/* expiry */ - -void expiry_init(struct expiry *exq, int expiry_in_seconds) -{ - ZERO_STRUCT(exq); - exq->expiry_in_seconds = expiry_in_seconds; - INIT_LLIST_HEAD(&exq->items); -} - -void expiry_add(struct expiry *exq, struct expiring_item *item, time_t now) -{ - item->expiry = now + exq->expiry_in_seconds; - - OSMO_ASSERT(llist_empty(&exq->items) - || (item->expiry - >= llist_last(&exq->items, struct expiring_item, entry)->expiry)); - - /* Add/move to the tail to always sort by expiry, ascending. */ - llist_del(&item->entry); - llist_add_tail(&item->entry, &exq->items); -} - -int expiry_tick(struct expiry *exq, time_t now) -{ - int expired = 0; - struct expiring_item *m, *n; - llist_for_each_entry_safe(m, n, &exq->items, entry) { - if (m->expiry <= now) { - expiring_item_del(m); - expired ++; - } else { - /* The items are added sorted by expiry. So when we hit - * an unexpired entry, only more unexpired ones will - * follow. */ - break; - } - } - return expired; -} - -void expiry_clear(struct expiry *exq) -{ - struct expiring_item *m, *n; - llist_for_each_entry_safe(m, n, &exq->items, entry) { - expiring_item_del(m); - } -} - -void expiring_item_init(struct expiring_item *item) -{ - ZERO_STRUCT(item); - INIT_LLIST_HEAD(&item->entry); -} - -void expiring_item_del(struct expiring_item *item) -{ - OSMO_ASSERT(item); - llist_del(&item->entry); - INIT_LLIST_HEAD(&item->entry); - if (item->del_cb) { - /* avoid loops */ - del_cb_t del_cb = item->del_cb; - item->del_cb = 0; - (del_cb)(item); - } -} - - -/* nr_map, nr_pool */ - -void nr_pool_init(struct nr_pool *pool, nr_t nr_min, nr_t nr_max) -{ - *pool = (struct nr_pool){ - .nr_min = nr_min, - .nr_max = nr_max, - .last_nr = nr_max - }; -} - -nr_t nr_pool_next(struct nr_pool *pool) -{ - if (pool->last_nr >= pool->nr_max) - pool->last_nr = pool->nr_min; - else - pool->last_nr ++; - - return pool->last_nr; -} - -void nr_map_init(struct nr_map *map, struct nr_pool *pool, - struct expiry *exq) -{ - ZERO_STRUCT(map); - map->pool = pool; - map->add_items_to_expiry = exq; - INIT_LLIST_HEAD(&map->mappings); -} - -void nr_mapping_init(struct nr_mapping *m) -{ - ZERO_STRUCT(m); - INIT_LLIST_HEAD(&m->entry); - expiring_item_init(&m->expiry_entry); -} - -void nr_map_add(struct nr_map *map, struct nr_mapping *mapping, time_t now) -{ - /* Generate a mapped number */ - mapping->repl = nr_pool_next(map->pool); - - /* Add to the tail to always yield a list sorted by expiry, in - * ascending order. */ - llist_add_tail(&mapping->entry, &map->mappings); - nr_map_refresh(map, mapping, now); -} - -void nr_map_refresh(struct nr_map *map, struct nr_mapping *mapping, time_t now) -{ - if (!map->add_items_to_expiry) - return; - expiry_add(map->add_items_to_expiry, - &mapping->expiry_entry, - now); -} - -void nr_map_clear(struct nr_map *map) -{ - struct nr_mapping *m; - struct nr_mapping *n; - llist_for_each_entry_safe(m, n, &map->mappings, entry) { - nr_mapping_del(m); - } -} - -int nr_map_empty(const struct nr_map *map) -{ - return llist_empty(&map->mappings); -} - -struct nr_mapping *nr_map_get(const struct nr_map *map, - void *origin, nr_t nr_orig) -{ - struct nr_mapping *mapping; - llist_for_each_entry(mapping, &map->mappings, entry) { - if ((mapping->origin == origin) - && (mapping->orig == nr_orig)) - return mapping; - } - /* Not found. */ - return NULL; -} - -struct nr_mapping *nr_map_get_inv(const struct nr_map *map, nr_t nr_repl) -{ - struct nr_mapping *mapping; - llist_for_each_entry(mapping, &map->mappings, entry) { - if (mapping->repl == nr_repl) { - return mapping; - } - } - /* Not found. */ - return NULL; -} - -void nr_mapping_del(struct nr_mapping *mapping) -{ - OSMO_ASSERT(mapping); - llist_del(&mapping->entry); - INIT_LLIST_HEAD(&mapping->entry); - expiring_item_del(&mapping->expiry_entry); -} - - -/* gtphub */ - -const char* const gtphub_plane_idx_names[GTPH_PLANE_N] = { - "CTRL", - "USER", -}; - -const uint16_t gtphub_plane_idx_default_port[GTPH_PLANE_N] = { - 2123, - 2152, -}; - -const char* const gtphub_side_idx_names[GTPH_SIDE_N] = { - "SGSN", - "GGSN", -}; - -time_t gtphub_now(void) -{ - struct timespec now_tp; - OSMO_ASSERT(clock_gettime(CLOCK_MONOTONIC, &now_tp) >= 0); - return now_tp.tv_sec; -} - -/* Remove a gtphub_peer from its list and free it. */ -static void gtphub_peer_del(struct gtphub_peer *peer) -{ - OSMO_ASSERT(llist_empty(&peer->addresses)); - nr_map_clear(&peer->seq_map); - llist_del(&peer->entry); - talloc_free(peer); -} - -static void gtphub_peer_addr_del(struct gtphub_peer_addr *pa) -{ - OSMO_ASSERT(llist_empty(&pa->ports)); - llist_del(&pa->entry); - talloc_free(pa); -} - -static void gtphub_peer_port_del(struct gtphub_peer_port *pp) -{ - OSMO_ASSERT(pp->ref_count == 0); - llist_del(&pp->entry); - rate_ctr_group_free(pp->counters_io); - talloc_free(pp); -} - -/* From the information in the gtp_packet_desc, return the address of a GGSN. - * Return -1 on error. */ -static int gtphub_resolve_ggsn(struct gtphub *hub, - struct gtp_packet_desc *p, - struct gtphub_peer_port **pp); - -/* See gtphub_ext.c (wrapped by unit test) */ -struct gtphub_peer_port *gtphub_resolve_ggsn_addr(struct gtphub *hub, - const char *imsi_str, - const char *apn_ni_str); -int gtphub_ares_init(struct gtphub *hub); - -static void gtphub_zero(struct gtphub *hub) -{ - ZERO_STRUCT(hub); - INIT_LLIST_HEAD(&hub->ggsn_lookups); - INIT_LLIST_HEAD(&hub->resolved_ggsns); -} - -static int gtphub_sock_init(struct osmo_fd *ofd, - const struct gtphub_cfg_addr *addr, - osmo_fd_cb_t cb, - void *data, - int ofd_id) -{ - if (!addr->addr_str) { - LOG(LOGL_FATAL, "Cannot bind: empty address.\n"); - return -1; - } - if (!addr->port) { - LOG(LOGL_FATAL, "Cannot bind: zero port not permitted.\n"); - return -1; - } - - ofd->when = BSC_FD_READ; - ofd->cb = cb; - ofd->data = data; - ofd->priv_nr = ofd_id; - - int rc; - rc = osmo_sock_init_ofd(ofd, - AF_UNSPEC, SOCK_DGRAM, IPPROTO_UDP, - addr->addr_str, addr->port, - OSMO_SOCK_F_BIND); - if (rc < 1) { - LOG(LOGL_FATAL, "Cannot bind to %s port %d (rc %d)\n", - addr->addr_str, (int)addr->port, rc); - return -1; - } - - return 0; -} - -static void gtphub_sock_close(struct osmo_fd *ofd) -{ - close(ofd->fd); - osmo_fd_unregister(ofd); - ofd->cb = NULL; -} - -static void gtphub_bind_init(struct gtphub_bind *b) -{ - ZERO_STRUCT(b); - - INIT_LLIST_HEAD(&b->peers); - - b->counters_io = rate_ctr_group_alloc(osmo_gtphub_ctx, - >phub_ctrg_io_desc, 0); - OSMO_ASSERT(b->counters_io); -} - -static int gtphub_bind_start(struct gtphub_bind *b, - const struct gtphub_cfg_bind *cfg, - osmo_fd_cb_t cb, void *cb_data, - unsigned int ofd_id) -{ - LOG(LOGL_DEBUG, "Starting bind %s\n", b->label); - if (gsn_addr_from_str(&b->local_addr, cfg->bind.addr_str) != 0) { - LOG(LOGL_FATAL, "Invalid bind address for %s: %s\n", - b->label, cfg->bind.addr_str); - return -1; - } - if (gtphub_sock_init(&b->ofd, &cfg->bind, cb, cb_data, ofd_id) != 0) { - LOG(LOGL_FATAL, "Cannot bind for %s: %s\n", - b->label, cfg->bind.addr_str); - return -1; - } - b->local_port = cfg->bind.port; - return 0; -} - -static void gtphub_bind_free(struct gtphub_bind *b) -{ - OSMO_ASSERT(llist_empty(&b->peers)); - rate_ctr_group_free(b->counters_io); -} - -static void gtphub_bind_stop(struct gtphub_bind *b) { - gtphub_sock_close(&b->ofd); - gtphub_bind_free(b); -} - -/* Recv datagram from from->fd, write sender's address to *from_addr. - * Return the number of bytes read, zero on error. */ -static int gtphub_read(const struct osmo_fd *from, - struct osmo_sockaddr *from_addr, - uint8_t *buf, size_t buf_len) -{ - OSMO_ASSERT(from_addr); - - /* recvfrom requires the available length set in *from_addr_len. */ - from_addr->l = sizeof(from_addr->a); - errno = 0; - ssize_t received = recvfrom(from->fd, buf, buf_len, 0, - (struct sockaddr*)&from_addr->a, - &from_addr->l); - /* TODO use recvmsg and get a MSG_TRUNC flag to make sure the message - * is not truncated. Then maybe reduce buf's size. */ - - if (received <= 0) { - LOG((errno == EAGAIN? LOGL_DEBUG : LOGL_ERROR), - "error: %s\n", strerror(errno)); - return 0; - } - - LOG(LOGL_DEBUG, "Received %d bytes from %s: %s%s\n", - (int)received, osmo_sockaddr_to_str(from_addr), - osmo_hexdump(buf, received > 1000? 1000 : received), - received > 1000 ? "..." : ""); - - return received; -} - -static inline void gtphub_port_ref_count_inc(struct gtphub_peer_port *pp) -{ - OSMO_ASSERT(pp); - OSMO_ASSERT(pp->ref_count < UINT_MAX); - pp->ref_count++; -} - -static inline void gtphub_port_ref_count_dec(struct gtphub_peer_port *pp) -{ - OSMO_ASSERT(pp); - OSMO_ASSERT(pp->ref_count > 0); - pp->ref_count--; -} - -static inline void set_seq(struct gtp_packet_desc *p, uint16_t seq) -{ - OSMO_ASSERT(p->version == 1); - p->data->gtp1l.h.seq = hton16(seq); - p->seq = seq; -} - -static inline void set_tei(struct gtp_packet_desc *p, uint32_t tei) -{ - OSMO_ASSERT(p->version == 1); - p->data->gtp1l.h.tei = hton32(tei); - p->header_tei = tei; -} - -static void gtphub_mapping_del_cb(struct expiring_item *expi); - -static struct nr_mapping *gtphub_mapping_new() -{ - struct nr_mapping *nrm; - nrm = talloc_zero(osmo_gtphub_ctx, struct nr_mapping); - OSMO_ASSERT(nrm); - - nr_mapping_init(nrm); - nrm->expiry_entry.del_cb = gtphub_mapping_del_cb; - return nrm; -} - - -#define APPEND(args...) \ - l = snprintf(pos, left, args); \ - pos += l; \ - left -= l - -static const char *gtphub_tunnel_side_str(struct gtphub_tunnel *tun, - int side_idx) -{ - static char buf[256]; - char *pos = buf; - int left = sizeof(buf); - int l; - - struct gtphub_tunnel_endpoint *c, *u; - c = &tun->endpoint[side_idx][GTPH_PLANE_CTRL]; - u = &tun->endpoint[side_idx][GTPH_PLANE_USER]; - - /* print both only if they differ. */ - if (!c->peer) { - APPEND("(uninitialized)"); - } else { - APPEND("%s", gsn_addr_to_str(&c->peer->peer_addr->addr)); - } - - if (!u->peer) { - if (c->peer) { - APPEND("/(uninitialized)"); - } - } else if ((!c->peer) - || (!gsn_addr_same(&u->peer->peer_addr->addr, - &c->peer->peer_addr->addr))) { - APPEND("/%s", gsn_addr_to_str(&u->peer->peer_addr->addr)); - } - - APPEND(" (TEI C=%x U=%x)", - c->tei_orig, - u->tei_orig); - return buf; -} - -const char *gtphub_tunnel_str(struct gtphub_tunnel *tun) -{ - static char buf[512]; - char *pos = buf; - int left = sizeof(buf); - int l; - - if (!tun) - return "null-tunnel"; - - APPEND("TEI=%x: ", tun->tei_repl); - APPEND("%s", gtphub_tunnel_side_str(tun, GTPH_SIDE_SGSN)); - APPEND(" <-> %s", gtphub_tunnel_side_str(tun, GTPH_SIDE_GGSN)); - - return buf; -} - -#undef APPEND - -void gtphub_tunnel_endpoint_set_peer(struct gtphub_tunnel_endpoint *te, - struct gtphub_peer_port *pp) -{ - if (te->peer) - gtphub_port_ref_count_dec(te->peer); - te->peer = pp; - if (te->peer) - gtphub_port_ref_count_inc(te->peer); -} - -int gtphub_tunnel_complete(struct gtphub_tunnel *tun) -{ - if (!tun) - return 0; - if (!tun->tei_repl) - return 0; - int side_idx; - int plane_idx; - for_each_side_and_plane(side_idx, plane_idx) { - struct gtphub_tunnel_endpoint *te = - &tun->endpoint[side_idx][plane_idx]; - if (!(te->peer && te->tei_orig)) - return 0; - } - return 1; -} - -static void gtphub_tunnel_del_cb(struct expiring_item *expi) -{ - struct gtphub_tunnel *tun = container_of(expi, - struct gtphub_tunnel, - expiry_entry); - LOG(LOGL_DEBUG, "expired: %s\n", gtphub_tunnel_str(tun)); - - llist_del(&tun->entry); - INIT_LLIST_HEAD(&tun->entry); /* mark unused */ - - expi->del_cb = 0; /* avoid recursion loops */ - expiring_item_del(&tun->expiry_entry); /* usually already done, but make sure. */ - - int side_idx; - int plane_idx; - for_each_side_and_plane(side_idx, plane_idx) { - struct gtphub_tunnel_endpoint *te = &tun->endpoint[side_idx][plane_idx]; - - /* clear ref count */ - gtphub_tunnel_endpoint_set_peer(te, NULL); - - rate_ctr_group_free(te->counters_io); - } - - talloc_free(tun); -} - -static struct gtphub_tunnel *gtphub_tunnel_new() -{ - struct gtphub_tunnel *tun; - tun = talloc_zero(osmo_gtphub_ctx, struct gtphub_tunnel); - OSMO_ASSERT(tun); - - INIT_LLIST_HEAD(&tun->entry); - expiring_item_init(&tun->expiry_entry); - - int side_idx, plane_idx; - for_each_side_and_plane(side_idx, plane_idx) { - struct gtphub_tunnel_endpoint *te = &tun->endpoint[side_idx][plane_idx]; - te->counters_io = rate_ctr_group_alloc(osmo_gtphub_ctx, - >phub_ctrg_io_desc, - 0); - OSMO_ASSERT(te->counters_io); - } - - tun->expiry_entry.del_cb = gtphub_tunnel_del_cb; - return tun; -} - -static const char *gtphub_peer_strb(struct gtphub_peer *peer, char *buf, - int buflen) -{ - if (llist_empty(&peer->addresses)) - return "(addressless)"; - - struct gtphub_peer_addr *a = llist_first(&peer->addresses, - struct gtphub_peer_addr, - entry); - return gsn_addr_to_strb(&a->addr, buf, buflen); -} - -static const char *gtphub_port_strb(struct gtphub_peer_port *port, char *buf, - int buflen) -{ - if (!port) - return "(null port)"; - - snprintf(buf, buflen, "%s port %d", - gsn_addr_to_str(&port->peer_addr->addr), - (int)port->port); - return buf; -} - -const char *gtphub_peer_str(struct gtphub_peer *peer) -{ - static char buf[256]; - return gtphub_peer_strb(peer, buf, sizeof(buf)); -} - -const char *gtphub_port_str(struct gtphub_peer_port *port) -{ - static char buf[256]; - return gtphub_port_strb(port, buf, sizeof(buf)); -} - -static const char *gtphub_port_str2(struct gtphub_peer_port *port) -{ - static char buf[256]; - return gtphub_port_strb(port, buf, sizeof(buf)); -} - -static void gtphub_mapping_del_cb(struct expiring_item *expi) -{ - expi->del_cb = 0; /* avoid recursion loops */ - expiring_item_del(expi); /* usually already done, but make sure. */ - - struct nr_mapping *nrm = container_of(expi, - struct nr_mapping, - expiry_entry); - llist_del(&nrm->entry); - INIT_LLIST_HEAD(&nrm->entry); /* mark unused */ - - /* Just for log */ - struct gtphub_peer_port *from = nrm->origin; - OSMO_ASSERT(from); - LOG(LOGL_DEBUG, "expired: %d: nr mapping from %s: %u->%u\n", - (int)nrm->expiry_entry.expiry, - gtphub_port_str(from), - (unsigned int)nrm->orig, (unsigned int)nrm->repl); - - gtphub_port_ref_count_dec(from); - - talloc_free(nrm); -} - -static struct nr_mapping *gtphub_mapping_have(struct nr_map *map, - struct gtphub_peer_port *from, - nr_t orig_nr, - time_t now) -{ - struct nr_mapping *nrm; - - nrm = nr_map_get(map, from, orig_nr); - - if (!nrm) { - nrm = gtphub_mapping_new(); - nrm->orig = orig_nr; - nrm->origin = from; - nr_map_add(map, nrm, now); - gtphub_port_ref_count_inc(from); - LOG(LOGL_DEBUG, "peer %s: sequence map %d --> %d\n", - gtphub_port_str(from), - (int)(nrm->orig), (int)(nrm->repl)); - } else { - nr_map_refresh(map, nrm, now); - } - - OSMO_ASSERT(nrm); - return nrm; -} - -static void gtphub_map_seq(struct gtp_packet_desc *p, - struct gtphub_peer_port *from_port, - struct gtphub_peer_port *to_port) -{ - /* Store a mapping in to_peer's map, so when we later receive a GTP - * packet back from to_peer, the seq nr can be unmapped back to its - * origin (from_peer here). */ - struct nr_mapping *nrm; - nrm = gtphub_mapping_have(&to_port->peer_addr->peer->seq_map, - from_port, p->seq, p->timestamp); - - /* Change the GTP packet to yield the new, mapped seq nr */ - set_seq(p, nrm->repl); -} - -static struct gtphub_peer_port *gtphub_unmap_seq(struct gtp_packet_desc *p, - struct gtphub_peer_port *responding_port) -{ - OSMO_ASSERT(p->version == 1); - struct nr_mapping *nrm = - nr_map_get_inv(&responding_port->peer_addr->peer->seq_map, - p->seq); - if (!nrm) - return NULL; - LOG(LOGL_DEBUG, "peer %p: sequence unmap %d <-- %d\n", - nrm->origin, (int)(nrm->orig), (int)(nrm->repl)); - set_seq(p, nrm->orig); - return nrm->origin; -} - -static int gtphub_check_mapped_tei(struct gtphub_tunnel *new_tun, - struct gtphub_tunnel *iterated_tun, - uint32_t *tei_min, - uint32_t *tei_max) -{ - if (!new_tun->tei_repl || !iterated_tun->tei_repl) - return 1; - - *tei_min = (*tei_min < iterated_tun->tei_repl)? *tei_min : iterated_tun->tei_repl; - *tei_max = (*tei_max > iterated_tun->tei_repl)? *tei_max : iterated_tun->tei_repl; - - if (new_tun->tei_repl != iterated_tun->tei_repl) - return 1; - - /* new_tun->tei_repl is already taken. Try to find one out of the known - * range. */ - LOG(LOGL_DEBUG, "TEI replacement %d already taken.\n", new_tun->tei_repl); - - if ((*tei_max) < 0xffffffff) { - (*tei_max)++; - new_tun->tei_repl = *tei_max; - LOG(LOGL_DEBUG, "Using TEI %d instead.\n", new_tun->tei_repl); - return 1; - } else if ((*tei_min) > 1) { - (*tei_min)--; - new_tun->tei_repl = *tei_min; - LOG(LOGL_DEBUG, "Using TEI %d instead.\n", new_tun->tei_repl); - return 1; - } - - /* None seems to be available. */ - return 0; -} - -static int gtphub_check_reused_teis(struct gtphub *hub, - struct gtphub_tunnel *new_tun) -{ - uint32_t tei_min = 0xffffffff; - uint32_t tei_max = 0; - int side_idx; - int plane_idx; - struct gtphub_tunnel_endpoint *te; - struct gtphub_tunnel_endpoint *te2; - - struct gtphub_tunnel *tun, *ntun; - - llist_for_each_entry_safe(tun, ntun, &hub->tunnels, entry) { - if (tun == new_tun) - continue; - - /* Check whether the GSN sent a TEI that it is reusing from a - * previous tunnel. */ - int tun_continue = 0; - for_each_side(side_idx) { - for_each_plane(plane_idx) { - te = &tun->endpoint[side_idx][plane_idx]; - te2 = &new_tun->endpoint[side_idx][plane_idx]; - if ((te->tei_orig == 0) - || (te->tei_orig != te2->tei_orig) - || (!te->peer) - || (!te2->peer) - || !gsn_addr_same(&te->peer->peer_addr->addr, - &te2->peer->peer_addr->addr)) - continue; - - /* The peer is reusing a TEI that I believe to - * be part of another tunnel. The other tunnel - * must be stale, then. */ - LOG(LOGL_NOTICE, - "Expiring tunnel due to reused TEI:" - " %s peer %s sent %s TEI %x," - " previously used by tunnel %s...\n", - gtphub_side_idx_names[side_idx], - gtphub_port_str(te->peer), - gtphub_plane_idx_names[plane_idx], - te->tei_orig, - gtphub_tunnel_str(tun)); - LOG(LOGL_NOTICE, "...while establishing tunnel %s\n", - gtphub_tunnel_str(new_tun)); - - expiring_item_del(&tun->expiry_entry); - /* continue to find more matches. There shouldn't be - * any, but let's make sure. However, tun is deleted, - * so we need to skip to the next tunnel. */ - tun_continue = 1; - break; - } - if (tun_continue) - break; - } - if (tun_continue) - continue; - - /* Check whether the mapped TEI is already used by another - * tunnel. */ - if (!gtphub_check_mapped_tei(new_tun, tun, &tei_min, &tei_max)) { - LOG(LOGL_ERROR, - "No mapped TEI is readily available." - " Searching for holes between occupied" - " TEIs not implemented."); - return 0; - } - - } - - return 1; -} - -static void gtphub_tunnel_refresh(struct gtphub *hub, - struct gtphub_tunnel *tun, - time_t now) -{ - expiry_add(&hub->expire_slowly, - &tun->expiry_entry, - now); -} - -static struct gtphub_tunnel_endpoint *gtphub_unmap_tei(struct gtphub *hub, - struct gtp_packet_desc *p, - struct gtphub_peer_port *from, - struct gtphub_tunnel **unmapped_from_tun) -{ - OSMO_ASSERT(from); - int other_side = other_side_idx(p->side_idx); - - struct gtphub_tunnel *tun; - llist_for_each_entry(tun, &hub->tunnels, entry) { - struct gtphub_tunnel_endpoint *te_from = - &tun->endpoint[p->side_idx][p->plane_idx]; - struct gtphub_tunnel_endpoint *te_to = - &tun->endpoint[other_side][p->plane_idx]; - if ((tun->tei_repl == p->header_tei_rx) - && te_from->peer - && gsn_addr_same(&te_from->peer->peer_addr->addr, - &from->peer_addr->addr)) { - gtphub_tunnel_refresh(hub, tun, p->timestamp); - if (unmapped_from_tun) - *unmapped_from_tun = tun; - return te_to; - } - } - - if (unmapped_from_tun) - *unmapped_from_tun = NULL; - return NULL; -} - -static void gtphub_map_restart_counter(struct gtphub *hub, - struct gtp_packet_desc *p) -{ - if (p->rc != GTP_RC_PDU_C) - return; - - int ie_idx; - ie_idx = gtpie_getie(p->ie, GTPIE_RECOVERY, 0); - if (ie_idx < 0) - return; - - /* Always send gtphub's own restart counter */ - p->ie[ie_idx]->tv1.v = hton8(hub->restart_counter); -} - -static int gtphub_unmap_header_tei(struct gtphub_peer_port **to_port_p, - struct gtphub_tunnel **unmapped_from_tun, - struct gtphub *hub, - struct gtp_packet_desc *p, - struct gtphub_peer_port *from_port) -{ - OSMO_ASSERT(p->version == 1); - *to_port_p = NULL; - if (unmapped_from_tun) - *unmapped_from_tun = NULL; - - /* If the header's TEI is zero, no PDP context has been established - * yet. If nonzero, a mapping should actually already exist for this - * TEI, since it must have been announced in a PDP context creation. */ - if (!p->header_tei_rx) - return 0; - - /* to_peer has previously announced a TEI, which was stored and - * mapped in a tunnel struct. */ - struct gtphub_tunnel_endpoint *to; - to = gtphub_unmap_tei(hub, p, from_port, unmapped_from_tun); - if (!to) { - LOG(LOGL_ERROR, "Received unknown TEI %" PRIx32 " from %s\n", - p->header_tei_rx, gtphub_port_str(from_port)); - return -1; - } - - if (unmapped_from_tun) { - OSMO_ASSERT(*unmapped_from_tun); - LOG(LOGL_DEBUG, "Unmapped TEI coming from: %s\n", - gtphub_tunnel_str(*unmapped_from_tun)); - } - - uint32_t unmapped_tei = to->tei_orig; - set_tei(p, unmapped_tei); - - /* May be NULL for an invalidated tunnel. */ - *to_port_p = to->peer; - - return 0; -} - -static int gtphub_handle_create_pdp_ctx(struct gtphub *hub, - struct gtp_packet_desc *p, - struct gtphub_peer_port *from_ctrl, - struct gtphub_peer_port *to_ctrl) -{ - int plane_idx; - - osmo_static_assert((GTPH_PLANE_CTRL == 0) && (GTPH_PLANE_USER == 1), - plane_nrs_match_GSN_addr_IE_indices); - - struct gtphub_tunnel *tun = p->tun; - - if (p->type == GTP_CREATE_PDP_REQ) { - if (p->side_idx != GTPH_SIDE_SGSN) { - LOG(LOGL_ERROR, "Wrong side: Create PDP Context" - " Request from the GGSN side: %s", - gtphub_port_str(from_ctrl)); - return -1; - } - - if (tun) { - LOG(LOGL_ERROR, "Not implemented: Received" - " Create PDP Context Request for an already" - " established tunnel:" - " from %s, tunnel %s\n", - gtphub_port_str(from_ctrl), - gtphub_tunnel_str(p->tun)); - return -1; - } - - /* A new tunnel. */ - p->tun = tun = gtphub_tunnel_new(); - - /* Create TEI mapping */ - tun->tei_repl = nr_pool_next(&hub->tei_pool); - - llist_add(&tun->entry, &hub->tunnels); - gtphub_tunnel_refresh(hub, tun, p->timestamp); - /* The endpoint peers on this side (SGSN) will be set from IEs - * below. Also set the GGSN Ctrl endpoint, for logging. */ - gtphub_tunnel_endpoint_set_peer(&tun->endpoint[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL], - to_ctrl); - } else if (p->type == GTP_CREATE_PDP_RSP) { - if (p->side_idx != GTPH_SIDE_GGSN) { - LOG(LOGL_ERROR, "Wrong side: Create PDP Context" - " Response from the SGSN side: %s", - gtphub_port_str(from_ctrl)); - return -1; - } - - /* The tunnel should already have been resolved from the header - * TEI and be available in tun (== p->tun). Just fill in the - * GSN Addresses below.*/ - OSMO_ASSERT(tun); - OSMO_ASSERT(tun->tei_repl == p->header_tei_rx); - OSMO_ASSERT(to_ctrl); - } - - uint8_t ie_type[] = { GTPIE_TEI_C, GTPIE_TEI_DI }; - int ie_mandatory = (p->type == GTP_CREATE_PDP_REQ); - unsigned int side_idx = p->side_idx; - - for (plane_idx = 0; plane_idx < 2; plane_idx++) { - int rc; - struct gsn_addr use_addr; - uint16_t use_port; - uint32_t tei_from_ie; - int ie_idx; - - /* Fetch GSN Address and TEI from IEs. As ensured by above - * static asserts, plane_idx corresponds to the GSN Address IE - * index (the first one = 0 = ctrl, second one = 1 = user). */ - rc = gsn_addr_get(&use_addr, p, plane_idx); - if (rc) { - LOG(LOGL_ERROR, "Cannot read %s GSN Address IE\n", - gtphub_plane_idx_names[plane_idx]); - return -1; - } - LOG(LOGL_DEBUG, "Read %s GSN addr %s (%d)\n", - gtphub_plane_idx_names[plane_idx], - gsn_addr_to_str(&use_addr), - use_addr.len); - - ie_idx = gtpie_getie(p->ie, ie_type[plane_idx], 0); - if (ie_idx < 0) { - if (ie_mandatory) { - LOG(LOGL_ERROR, - "Create PDP Context message invalid:" - " missing IE %d\n", - (int)ie_type[plane_idx]); - return -1; - } - tei_from_ie = 0; - } - else - tei_from_ie = ntoh32(p->ie[ie_idx]->tv4.v); - - /* Make sure an entry for this peer address with default port - * exists. - * - * Exception: if sgsn_use_sender is set, instead use the - * sender's address and port for Ctrl -- the User port is not - * known until the first User packet arrives. - * - * Note: doing this here is just an optimization, because - * gtphub_handle_buf() has code to replace the tunnel - * endpoints' addresses with the sender (needed for User - * plane). We could just ignore sgsn_use_sender here. But if we - * set up a default port here and replace it in - * gtphub_handle_buf(), we'd be creating a peer port just to - * expire it right away. */ - if (hub->sgsn_use_sender && (side_idx == GTPH_SIDE_SGSN)) { - gsn_addr_from_sockaddr(&use_addr, &use_port, &from_ctrl->sa); - } else { - use_port = gtphub_plane_idx_default_port[plane_idx]; - - } - - struct gtphub_peer_port *peer_from_ie; - peer_from_ie = gtphub_port_have(hub, - &hub->to_gsns[side_idx][plane_idx], - &use_addr, use_port); - - gtphub_tunnel_endpoint_set_peer(&tun->endpoint[side_idx][plane_idx], - peer_from_ie); - - if (!tei_from_ie && - !tun->endpoint[side_idx][plane_idx].tei_orig) { - LOG(LOGL_ERROR, - "Create PDP Context message omits %s TEI, but" - " no TEI has been announced for this tunnel: %s\n", - gtphub_plane_idx_names[plane_idx], - gtphub_tunnel_str(tun)); - return -1; - } - - if (tei_from_ie) { - /* Replace TEI in GTP packet IE */ - tun->endpoint[side_idx][plane_idx].tei_orig = tei_from_ie; - p->ie[ie_idx]->tv4.v = hton32(tun->tei_repl); - - if (!gtphub_check_reused_teis(hub, tun)) { - /* It's highly unlikely that all TEIs are - * taken. But the code looking for an unused - * TEI is, at the time of writing this comment, - * not able to find gaps in the TEI space. To - * explicitly alert the user of this problem, - * rather abort than carry on. */ - LOG(LOGL_FATAL, "TEI range exhausted. Cannot create TEI mapping, aborting.\n"); - abort(); - } - } - - /* Replace the GSN address to reflect gtphub. */ - rc = gsn_addr_put(&hub->to_gsns[other_side_idx(side_idx)][plane_idx].local_addr, - p, plane_idx); - if (rc) { - LOG(LOGL_ERROR, "Cannot write %s GSN Address IE\n", - gtphub_plane_idx_names[plane_idx]); - return -1; - } - } - - if (p->type == GTP_CREATE_PDP_REQ) { - LOG(LOGL_DEBUG, "New tunnel, first half: %s\n", - gtphub_tunnel_str(tun)); - } else if (p->type == GTP_CREATE_PDP_RSP) { - LOG(LOGL_DEBUG, "New tunnel: %s\n", - gtphub_tunnel_str(tun)); - } - - return 0; -} - -static void pending_delete_del_cb(struct expiring_item *expi) -{ - struct pending_delete *pd; - pd = container_of(expi, struct pending_delete, expiry_entry); - - llist_del(&pd->entry); - INIT_LLIST_HEAD(&pd->entry); - - pd->expiry_entry.del_cb = 0; - expiring_item_del(&pd->expiry_entry); - - talloc_free(pd); -} - -static struct pending_delete *pending_delete_new(void) -{ - struct pending_delete *pd = talloc_zero(osmo_gtphub_ctx, struct pending_delete); - INIT_LLIST_HEAD(&pd->entry); - expiring_item_init(&pd->expiry_entry); - pd->expiry_entry.del_cb = pending_delete_del_cb; - return pd; -} - -static int gtphub_handle_delete_pdp_ctx(struct gtphub *hub, - struct gtp_packet_desc *p, - struct gtphub_peer_port *from_ctrl, - struct gtphub_peer_port *to_ctrl) -{ - struct gtphub_tunnel *known_tun = p->tun; - - if (p->type == GTP_DELETE_PDP_REQ) { - if (!known_tun) { - LOG(LOGL_ERROR, "Cannot find tunnel for Delete PDP Context Request.\n"); - return -1; - } - - /* Store the Delete Request until a successful Response is seen. */ - uint8_t teardown_ind; - uint8_t nsapi; - - if (gtpie_gettv1(p->ie, GTPIE_TEARDOWN, 0, &teardown_ind) != 0) { - LOG(LOGL_ERROR, "Missing Teardown Ind IE in Delete PDP Context Request.\n"); - return -1; - } - - if (gtpie_gettv1(p->ie, GTPIE_NSAPI, 0, &nsapi) != 0) { - LOG(LOGL_ERROR, "Missing NSAPI IE in Delete PDP Context Request.\n"); - return -1; - } - - struct pending_delete *pd = NULL; - - struct pending_delete *pdi = NULL; - llist_for_each_entry(pdi, &hub->pending_deletes, entry) { - if ((pdi->tun == known_tun) - && (pdi->teardown_ind == teardown_ind) - && (pdi->nsapi == nsapi)) { - pd = pdi; - break; - } - } - - if (!pd) { - pd = pending_delete_new(); - pd->tun = known_tun; - pd->teardown_ind = teardown_ind; - pd->nsapi = nsapi; - - LOG(LOGL_DEBUG, "Tunnel delete pending: %s\n", - gtphub_tunnel_str(known_tun)); - llist_add(&pd->entry, &hub->pending_deletes); - } - - /* Add or refresh timeout. */ - expiry_add(&hub->expire_quickly, &pd->expiry_entry, p->timestamp); - - /* If a pending_delete should expire before the response to - * indicate success comes in, the responding peer will have the - * tunnel deactivated, while the requesting peer gets no reply - * and keeps the tunnel. The hope is that the requesting peer - * will try again and get a useful response. */ - } else if (p->type == GTP_DELETE_PDP_RSP) { - /* Find the Delete Request for this Response. */ - struct pending_delete *pd = NULL; - - struct pending_delete *pdi; - llist_for_each_entry(pdi, &hub->pending_deletes, entry) { - if (known_tun == pdi->tun) { - pd = pdi; - break; - } - } - - if (!pd) { - LOG(LOGL_ERROR, "Delete PDP Context Response:" - " Cannot find matching request."); - /* If we delete the tunnel now, anyone can send a - * Delete response to kill tunnels at will. */ - return -1; - } - - /* TODO handle teardown_ind and nsapi */ - - expiring_item_del(&pd->expiry_entry); - - uint8_t cause; - if (gtpie_gettv1(p->ie, GTPIE_CAUSE, 0, &cause) != 0) { - LOG(LOGL_ERROR, "Delete PDP Context Response:" - " Missing Cause IE."); - /* If we delete the tunnel now, at least one of the - * peers may still think it is active. */ - return -1; - } - - if (cause != GTPCAUSE_ACC_REQ) { - LOG(LOGL_NOTICE, - "Delete PDP Context Response indicates failure;" - "for %s\n", - gtphub_tunnel_str(known_tun)); - return -1; - } - - LOG(LOGL_DEBUG, "Delete PDP Context: removing tunnel %s\n", - gtphub_tunnel_str(known_tun)); - p->tun = NULL; - expiring_item_del(&known_tun->expiry_entry); - } - - return 0; -} - -static int gtphub_handle_update_pdp_ctx(struct gtphub *hub, - struct gtp_packet_desc *p, - struct gtphub_peer_port *from_ctrl, - struct gtphub_peer_port *to_ctrl) -{ - /* TODO */ - return 0; -} - -/* Read GSN address IEs from p, and make sure these peer addresses exist in - * bind[plane_idx] with default ports, in their respective planes (both Ctrl - * and User). Map TEIs announced in IEs, and write mapped TEIs in-place into - * the packet p. */ -static int gtphub_handle_pdp_ctx(struct gtphub *hub, - struct gtp_packet_desc *p, - struct gtphub_peer_port *from_ctrl, - struct gtphub_peer_port *to_ctrl) -{ - OSMO_ASSERT(p->plane_idx == GTPH_PLANE_CTRL); - - switch (p->type) { - case GTP_CREATE_PDP_REQ: - case GTP_CREATE_PDP_RSP: - return gtphub_handle_create_pdp_ctx(hub, p, - from_ctrl, to_ctrl); - - case GTP_DELETE_PDP_REQ: - case GTP_DELETE_PDP_RSP: - return gtphub_handle_delete_pdp_ctx(hub, p, - from_ctrl, to_ctrl); - - case GTP_UPDATE_PDP_REQ: - case GTP_UPDATE_PDP_RSP: - return gtphub_handle_update_pdp_ctx(hub, p, - from_ctrl, to_ctrl); - - default: - /* Nothing to do for this message type. */ - return 0; - } - -} - -static int gtphub_send_del_pdp_ctx(struct gtphub *hub, - struct gtphub_tunnel *tun, - int to_side) -{ - static uint8_t del_ctx_msg[16] = { - 0x32, /* GTP v1 flags */ - GTP_DELETE_PDP_REQ, - 0x00, 0x08, /* Length in network byte order */ - 0x00, 0x00, 0x00, 0x00, /* TEI to be replaced */ - 0, 0, /* Seq, to be replaced */ - 0, 0, /* no extensions */ - 0x13, 0xff, /* 19: Teardown ind = 1 */ - 0x14, 0 /* 20: NSAPI = 0 */ - }; - - uint32_t *tei = (uint32_t*)&del_ctx_msg[4]; - uint16_t *seq = (uint16_t*)&del_ctx_msg[8]; - - struct gtphub_tunnel_endpoint *te = - &tun->endpoint[to_side][GTPH_PLANE_CTRL]; - - if (! te->peer) - return 0; - - *tei = hton32(te->tei_orig); - *seq = hton16(nr_pool_next(&te->peer->peer_addr->peer->seq_pool)); - - struct gtphub_bind *to_bind = &hub->to_gsns[to_side][GTPH_PLANE_CTRL]; - int rc = gtphub_write(&to_bind->ofd, &te->peer->sa, - del_ctx_msg, sizeof(del_ctx_msg)); - if (rc != 0) { - LOG(LOGL_ERROR, - "Failed to send out-of-band Delete PDP Context Request to %s\n", - gtphub_port_str(te->peer)); - } - return rc; -} - -/* Tell all peers on the other end of tunnels that PDP contexts are void. */ -static void gtphub_restarted(struct gtphub *hub, - struct gtp_packet_desc *p, - struct gtphub_peer_port *pp) -{ - LOG(LOGL_NOTICE, "Peer has restarted: %s\n", - gtphub_port_str(pp)); - - int deleted_count = 0; - struct gtphub_tunnel *tun; - llist_for_each_entry(tun, &hub->tunnels, entry) { - int side_idx; - for_each_side(side_idx) { - struct gtphub_tunnel_endpoint *te = &tun->endpoint[side_idx][GTPH_PLANE_CTRL]; - struct gtphub_tunnel_endpoint *te2 = &tun->endpoint[other_side_idx(side_idx)][GTPH_PLANE_CTRL]; - if ((!te->peer) - || (!te2->tei_orig) - || (pp->peer_addr->peer != te->peer->peer_addr->peer)) - continue; - - LOG(LOGL_DEBUG, "Deleting tunnel due to peer restart: %s\n", - gtphub_tunnel_str(tun)); - deleted_count ++; - - /* Send a Delete PDP Context Request to the - * peer on the other side, remember the pending - * delete and wait for the response to delete - * the tunnel. Clear this side of the tunnel to - * make sure it isn't used. - * - * Should the delete message send fail, or if no - * response is received, this tunnel will expire. If - * its TEIs come up in a new PDP Context Request, it - * will be removed. If messages for this tunnel should - * come in (from the not restarted side), they will be - * dropped because the tunnel is rendered unusable. */ - gtphub_send_del_pdp_ctx(hub, tun, other_side_idx(side_idx)); - - gtphub_tunnel_endpoint_set_peer(&tun->endpoint[side_idx][GTPH_PLANE_CTRL], - NULL); - gtphub_tunnel_endpoint_set_peer(&tun->endpoint[side_idx][GTPH_PLANE_USER], - NULL); - } - } - - if (deleted_count) - LOG(LOGL_NOTICE, "Deleting %d tunnels due to restart of: %s\n", - deleted_count, - gtphub_port_str(pp)); -} - -static int get_restart_count(struct gtp_packet_desc *p) -{ - int ie_idx; - ie_idx = gtpie_getie(p->ie, GTPIE_RECOVERY, 0); - if (ie_idx < 0) - return -1; - return ntoh8(p->ie[ie_idx]->tv1.v); -} - -static void gtphub_check_restart_counter(struct gtphub *hub, - struct gtp_packet_desc *p, - struct gtphub_peer_port *from) -{ - /* If the peer is sending a Recovery IE (7.7.11) with a restart counter - * that doesn't match the peer's previously sent restart counter, clear - * that peer and cancel PDP contexts. */ - - int restart = get_restart_count(p); - - if ((restart < 0) || (restart > 255)) - return; - - if ((from->last_restart_count >= 0) && (from->last_restart_count <= 255)) { - if (from->last_restart_count != restart) { - gtphub_restarted(hub, p, from); - } - } - - from->last_restart_count = restart; -} - -static int from_sgsns_read_cb(struct osmo_fd *from_sgsns_ofd, unsigned int what) -{ - unsigned int plane_idx = from_sgsns_ofd->priv_nr; - OSMO_ASSERT(plane_idx < GTPH_PLANE_N); - LOG(LOGL_DEBUG, "=== reading from SGSN (%s)\n", - gtphub_plane_idx_names[plane_idx]); - - if (!(what & BSC_FD_READ)) - return 0; - - struct gtphub *hub = from_sgsns_ofd->data; - - static uint8_t buf[4096]; - struct osmo_sockaddr from_addr; - struct osmo_sockaddr to_addr; - struct osmo_fd *to_ofd; - int len; - uint8_t *reply_buf; - - len = gtphub_read(from_sgsns_ofd, &from_addr, buf, sizeof(buf)); - if (len < 1) - return 0; - - len = gtphub_handle_buf(hub, GTPH_SIDE_SGSN, plane_idx, &from_addr, - buf, len, gtphub_now(), - &reply_buf, &to_ofd, &to_addr); - if (len < 1) - return 0; - - return gtphub_write(to_ofd, &to_addr, reply_buf, len); -} - -static int from_ggsns_read_cb(struct osmo_fd *from_ggsns_ofd, unsigned int what) -{ - unsigned int plane_idx = from_ggsns_ofd->priv_nr; - OSMO_ASSERT(plane_idx < GTPH_PLANE_N); - LOG(LOGL_DEBUG, "=== reading from GGSN (%s)\n", - gtphub_plane_idx_names[plane_idx]); - if (!(what & BSC_FD_READ)) - return 0; - - struct gtphub *hub = from_ggsns_ofd->data; - - static uint8_t buf[4096]; - struct osmo_sockaddr from_addr; - struct osmo_sockaddr to_addr; - struct osmo_fd *to_ofd; - int len; - uint8_t *reply_buf; - - len = gtphub_read(from_ggsns_ofd, &from_addr, buf, sizeof(buf)); - if (len < 1) - return 0; - - len = gtphub_handle_buf(hub, GTPH_SIDE_GGSN, plane_idx, &from_addr, - buf, len, gtphub_now(), - &reply_buf, &to_ofd, &to_addr); - if (len < 1) - return 0; - - return gtphub_write(to_ofd, &to_addr, reply_buf, len); -} - -static int gtphub_unmap(struct gtphub *hub, - struct gtp_packet_desc *p, - struct gtphub_peer_port *from, - struct gtphub_peer_port *to_proxy, - struct gtphub_peer_port **final_unmapped, - struct gtphub_peer_port **unmapped_from_seq) -{ - /* Always (try to) unmap sequence and TEI numbers, which need to be - * replaced in the packet. Either way, give precedence to the proxy, if - * configured. */ - - if (unmapped_from_seq) - *unmapped_from_seq = NULL; - if (final_unmapped) - *final_unmapped = NULL; - p->tun = NULL; - - struct gtphub_peer_port *from_seq = NULL; - struct gtphub_peer_port *from_tei = NULL; - struct gtphub_peer_port *unmapped = NULL; - - from_seq = gtphub_unmap_seq(p, from); - - if (gtphub_unmap_header_tei(&from_tei, &p->tun, hub, p, from) < 0) - return -1; - - struct gtphub_peer *from_peer = from->peer_addr->peer; - if (from_seq && from_tei && (from_seq != from_tei)) { - LOG(LOGL_DEBUG, - "Seq unmap and TEI unmap yield two different peers." - " Using seq unmap." - " (from %s %s: seq %d yields %s, tei %u yields %s)\n", - gtphub_plane_idx_names[p->plane_idx], - gtphub_peer_str(from_peer), - (int)p->seq, - gtphub_port_str(from_seq), - (unsigned int)p->header_tei_rx, - gtphub_port_str2(from_tei) - ); - } - unmapped = (from_seq? from_seq : from_tei); - - if (unmapped && to_proxy && (unmapped != to_proxy)) { - LOG(LOGL_NOTICE, - "Unmap yields a different peer than the configured proxy." - " Using proxy." - " unmapped: %s proxy: %s\n", - gtphub_port_str(unmapped), - gtphub_port_str2(to_proxy) - ); - } - unmapped = (to_proxy? to_proxy : unmapped); - - if (!unmapped) { - /* Return no error, but returned pointers are all NULL. */ - return 0; - } - - if (unmapped_from_seq) - *unmapped_from_seq = from_seq; - if (final_unmapped) - *final_unmapped = unmapped; - return 0; -} - -static int gsn_addr_to_sockaddr(struct gsn_addr *src, - uint16_t port, - struct osmo_sockaddr *dst) -{ - return osmo_sockaddr_init_udp(dst, gsn_addr_to_str(src), port); -} - -/* If p is an Echo request, replace p's data with the matching response and - * return 1. If p is no Echo request, return 0, or -1 if an invalid packet is - * detected. */ -static int gtphub_handle_echo_req(struct gtphub *hub, struct gtp_packet_desc *p, - uint8_t **reply_buf) -{ - if (p->type != GTP_ECHO_REQ) - return 0; - - static uint8_t echo_response_data[14] = { - 0x32, /* GTP v1 flags */ - GTP_ECHO_RSP, - 0x00, 14 - 8, /* Length in network byte order */ - 0x00, 0x00, 0x00, 0x00, /* Zero TEI */ - 0, 0, /* Seq, to be replaced */ - 0, 0, /* no extensions */ - 0x0e, /* Recovery IE */ - 0 /* Restart counter, to be replaced */ - }; - uint16_t *seq = (uint16_t*)&echo_response_data[8]; - uint8_t *recovery = &echo_response_data[13]; - - *seq = hton16(p->seq); - *recovery = hub->restart_counter; - - *reply_buf = echo_response_data; - - return sizeof(echo_response_data); -} - -struct gtphub_peer_port *gtphub_known_addr_have_port(const struct gtphub_bind *bind, - const struct osmo_sockaddr *addr); - -/* Parse buffer as GTP packet, replace elements in-place and return the ofd and - * address to forward to. Return a pointer to the osmo_fd, but copy the - * sockaddr to *to_addr. The reason for this is that the sockaddr may expire at - * any moment, while the osmo_fd is guaranteed to persist. Return the number of - * bytes to forward, 0 or less on failure. */ -int gtphub_handle_buf(struct gtphub *hub, - unsigned int side_idx, - unsigned int plane_idx, - const struct osmo_sockaddr *from_addr, - uint8_t *buf, - size_t received, - time_t now, - uint8_t **reply_buf, - struct osmo_fd **to_ofd, - struct osmo_sockaddr *to_addr) -{ - struct gtphub_bind *from_bind = &hub->to_gsns[side_idx][plane_idx]; - struct gtphub_bind *to_bind = &hub->to_gsns[other_side_idx(side_idx)][plane_idx]; - - rate_ctr_add(&from_bind->counters_io->ctr[GTPH_CTR_BYTES_IN], - received); - - struct gtp_packet_desc p; - gtp_decode(buf, received, side_idx, plane_idx, &p, now); - - LOG(LOGL_DEBUG, "%s rx %s from %s %s%s\n", - (side_idx == GTPH_SIDE_GGSN)? "<-" : "->", - gtphub_plane_idx_names[plane_idx], - gtphub_side_idx_names[side_idx], - osmo_sockaddr_to_str(from_addr), - gtp_type_str(p.type)); - - if (p.rc <= 0) { - LOG(LOGL_ERROR, "INVALID: dropping GTP packet%s from %s %s %s\n", - gtp_type_str(p.type), - gtphub_side_idx_names[side_idx], - gtphub_plane_idx_names[plane_idx], - osmo_sockaddr_to_str(from_addr)); - return -1; - } - - rate_ctr_inc(&from_bind->counters_io->ctr[GTPH_CTR_PKTS_IN]); - - int reply_len; - reply_len = gtphub_handle_echo_req(hub, &p, reply_buf); - if (reply_len > 0) { - /* It was an echo. Nothing left to do. */ - osmo_sockaddr_copy(to_addr, from_addr); - *to_ofd = &from_bind->ofd; - - rate_ctr_inc(&from_bind->counters_io->ctr[GTPH_CTR_PKTS_OUT]); - rate_ctr_add(&from_bind->counters_io->ctr[GTPH_CTR_BYTES_OUT], - reply_len); - LOG(LOGL_DEBUG, "%s Echo response to %s: %d bytes to %s\n", - (side_idx == GTPH_SIDE_GGSN)? "-->" : "<--", - gtphub_side_idx_names[side_idx], - (int)reply_len, osmo_sockaddr_to_str(to_addr)); - return reply_len; - } - if (reply_len < 0) - return -1; - - *to_ofd = &to_bind->ofd; - - /* If a proxy is configured, check that it's indeed that proxy talking - * to us. A proxy is a forced 1:1 connection, e.g. to another gtphub, - * so no-one else is allowed to talk to us from that side. */ - struct gtphub_peer_port *from_peer = hub->proxy[side_idx][plane_idx]; - if (from_peer) { - if (osmo_sockaddr_cmp(&from_peer->sa, from_addr) != 0) { - LOG(LOGL_ERROR, - "Rejecting: %s proxy configured, but GTP packet" - " received on %s bind is from another sender:" - " proxy: %s sender: %s\n", - gtphub_side_idx_names[side_idx], - gtphub_side_idx_names[side_idx], - gtphub_port_str(from_peer), - osmo_sockaddr_to_str(from_addr)); - return -1; - } - } - - if (!from_peer) { - /* Find or create a peer with a matching address. The sender's - * port may in fact differ. */ - from_peer = gtphub_known_addr_have_port(from_bind, from_addr); - } - - /* If any PDP context has been created, we already have an entry for - * this GSN. If we don't have an entry, a GGSN has nothing to tell us - * about, while an SGSN may initiate a PDP context. */ - if (!from_peer) { - if (side_idx == GTPH_SIDE_GGSN) { - LOG(LOGL_ERROR, "Dropping packet%s: unknown GGSN peer: %s\n", - gtp_type_str(p.type), - osmo_sockaddr_to_str(from_addr)); - return -1; - } else { - /* SGSN */ - /* A new peer. If this is on the Ctrl plane, an SGSN - * may make first contact without being known yet, so - * create the peer struct for the current sender. */ - if (plane_idx != GTPH_PLANE_CTRL) { - LOG(LOGL_ERROR, - "Dropping packet%s: User plane peer was not" - "announced by PDP Context: %s\n", - gtp_type_str(p.type), - osmo_sockaddr_to_str(from_addr)); - return -1; - } - - struct gsn_addr from_gsna; - uint16_t from_port; - if (gsn_addr_from_sockaddr(&from_gsna, &from_port, from_addr) != 0) - return -1; - - from_peer = gtphub_port_have(hub, from_bind, &from_gsna, from_port); - } - } - - if (!from_peer) { - /* This could theoretically happen for invalid address data or - * somesuch. */ - LOG(LOGL_ERROR, "Dropping packet%s: invalid %s peer: %s\n", - gtp_type_str(p.type), - gtphub_side_idx_names[side_idx], - osmo_sockaddr_to_str(from_addr)); - return -1; - } - - rate_ctr_add(&from_peer->counters_io->ctr[GTPH_CTR_BYTES_IN], - received); - rate_ctr_inc(&from_peer->counters_io->ctr[GTPH_CTR_PKTS_IN]); - - LOG(LOGL_DEBUG, "from %s peer: %s\n", gtphub_side_idx_names[side_idx], - gtphub_port_str(from_peer)); - - gtphub_check_restart_counter(hub, &p, from_peer); - gtphub_map_restart_counter(hub, &p); - - struct gtphub_peer_port *to_peer_from_seq; - struct gtphub_peer_port *to_peer; - if (gtphub_unmap(hub, &p, from_peer, - hub->proxy[other_side_idx(side_idx)][plane_idx], - &to_peer, &to_peer_from_seq) - != 0) { - return -1; - } - - if (p.tun) { - struct gtphub_tunnel_endpoint *te = &p.tun->endpoint[p.side_idx][p.plane_idx]; - rate_ctr_add(&te->counters_io->ctr[GTPH_CTR_BYTES_IN], - received); - rate_ctr_inc(&te->counters_io->ctr[GTPH_CTR_PKTS_IN]); - } - - if ((!to_peer) && (side_idx == GTPH_SIDE_SGSN)) { - if (gtphub_resolve_ggsn(hub, &p, &to_peer) < 0) - return -1; - } - - if (!to_peer && p.tun && p.type == GTP_DELETE_PDP_RSP) { - /* It's a delete confirmation for a tunnel that is partly - * invalid, probably marked unsuable due to a restarted peer. - * Remove the tunnel and be happy without forwarding. */ - expiring_item_del(&p.tun->expiry_entry); - p.tun = NULL; - return 0; - } - - if (!to_peer) { - LOG(LOGL_ERROR, "No %s to send to. Dropping packet%s" - " (type=%" PRIu8 ", header-TEI=%" PRIx32 ", seq=%" PRIx16 ").\n", - gtphub_side_idx_names[other_side_idx(side_idx)], - gtp_type_str(p.type), - p.type, p.header_tei_rx, p.seq - ); - return -1; - } - - if (plane_idx == GTPH_PLANE_CTRL) { - /* This may be a Create PDP Context response. If it is, there - * are other addresses in the GTP message to set up apart from - * the sender. */ - if (gtphub_handle_pdp_ctx(hub, &p, from_peer, to_peer) - != 0) - return -1; - } - - /* Either to_peer was resolved from an existing tunnel, - * or a PDP Ctx and thus a tunnel has just been created, - * or the tunnel has been deleted due to this message. */ - OSMO_ASSERT(p.tun || (p.type == GTP_DELETE_PDP_RSP)); - - /* If the GGSN is replying to an SGSN request, the sequence nr has - * already been unmapped above (to_peer_from_seq != NULL), and we need not - * create a new mapping. */ - if (!to_peer_from_seq) - gtphub_map_seq(&p, from_peer, to_peer); - - osmo_sockaddr_copy(to_addr, &to_peer->sa); - - *reply_buf = (uint8_t*)p.data; - - if (received) { - rate_ctr_inc(&to_bind->counters_io->ctr[GTPH_CTR_PKTS_OUT]); - rate_ctr_add(&to_bind->counters_io->ctr[GTPH_CTR_BYTES_OUT], - received); - - rate_ctr_inc(&to_peer->counters_io->ctr[GTPH_CTR_PKTS_OUT]); - rate_ctr_add(&to_peer->counters_io->ctr[GTPH_CTR_BYTES_OUT], - received); - } - - if (p.tun) { - struct gtphub_tunnel_endpoint *te = &p.tun->endpoint[other_side_idx(p.side_idx)][p.plane_idx]; - rate_ctr_inc(&te->counters_io->ctr[GTPH_CTR_PKTS_OUT]); - rate_ctr_add(&te->counters_io->ctr[GTPH_CTR_BYTES_OUT], - received); - } - - LOG(LOGL_DEBUG, "%s Forward to %s:" - " header-TEI %" PRIx32", seq %" PRIx16", %d bytes to %s\n", - (side_idx == GTPH_SIDE_SGSN)? "-->" : "<--", - gtphub_side_idx_names[other_side_idx(side_idx)], - p.header_tei, p.seq, - (int)received, osmo_sockaddr_to_str(to_addr)); - return received; -} - -static void resolved_gssn_del_cb(struct expiring_item *expi) -{ - struct gtphub_resolved_ggsn *ggsn; - ggsn = container_of(expi, struct gtphub_resolved_ggsn, expiry_entry); - - gtphub_port_ref_count_dec(ggsn->peer); - llist_del(&ggsn->entry); - - ggsn->expiry_entry.del_cb = 0; - expiring_item_del(&ggsn->expiry_entry); - - talloc_free(ggsn); -} - -void gtphub_resolved_ggsn(struct gtphub *hub, const char *apn_oi_str, - struct gsn_addr *resolved_addr, - time_t now) -{ - struct gtphub_peer_port *pp; - struct gtphub_resolved_ggsn *ggsn; - - LOG(LOGL_DEBUG, "Resolved GGSN callback: %s %s\n", - apn_oi_str, osmo_hexdump((unsigned char*)resolved_addr, - sizeof(*resolved_addr))); - - pp = gtphub_port_have(hub, &hub->to_gsns[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL], - resolved_addr, 2123); - if (!pp) { - LOG(LOGL_ERROR, "Internal: Cannot create/find peer '%s'\n", - gsn_addr_to_str(resolved_addr)); - return; - } - - ggsn = talloc_zero(osmo_gtphub_ctx, struct gtphub_resolved_ggsn); - OSMO_ASSERT(ggsn); - INIT_LLIST_HEAD(&ggsn->entry); - expiring_item_init(&ggsn->expiry_entry); - - ggsn->peer = pp; - gtphub_port_ref_count_inc(pp); - - osmo_strlcpy(ggsn->apn_oi_str, apn_oi_str, sizeof(ggsn->apn_oi_str)); - - ggsn->expiry_entry.del_cb = resolved_gssn_del_cb; - expiry_add(&hub->expire_slowly, &ggsn->expiry_entry, now); - - llist_add(&ggsn->entry, &hub->resolved_ggsns); -} - -static int gtphub_gc_peer_port(struct gtphub_peer_port *pp) -{ - return pp->ref_count == 0; -} - -static int gtphub_gc_peer_addr(struct gtphub_peer_addr *pa) -{ - struct gtphub_peer_port *pp, *npp; - llist_for_each_entry_safe(pp, npp, &pa->ports, entry) { - if (gtphub_gc_peer_port(pp)) { - LOG(LOGL_DEBUG, "expired: peer %s\n", - gtphub_port_str(pp)); - gtphub_peer_port_del(pp); - } - } - return llist_empty(&pa->ports); -} - -static int gtphub_gc_peer(struct gtphub_peer *p) -{ - struct gtphub_peer_addr *pa, *npa; - llist_for_each_entry_safe(pa, npa, &p->addresses, entry) { - if (gtphub_gc_peer_addr(pa)) { - gtphub_peer_addr_del(pa); - } - } - - /* Note that there's a ref_count in each gtphub_peer_port instance - * listed within p->addresses, referenced by TEI mappings from - * hub->tei_map. As long as those don't expire, this peer will stay. */ - - return llist_empty(&p->addresses) - && nr_map_empty(&p->seq_map); -} - -static void gtphub_gc_bind(struct gtphub_bind *b) -{ - struct gtphub_peer *p, *n; - llist_for_each_entry_safe(p, n, &b->peers, entry) { - if (gtphub_gc_peer(p)) { - gtphub_peer_del(p); - } - } -} - -void gtphub_gc(struct gtphub *hub, time_t now) -{ - int expired; - expired = expiry_tick(&hub->expire_quickly, now); - expired += expiry_tick(&hub->expire_slowly, now); - - /* ... */ - - if (expired) { - int s, p; - for_each_side_and_plane(s, p) { - gtphub_gc_bind(&hub->to_gsns[s][p]); - } - } -} - -static void gtphub_gc_cb(void *data) -{ - struct gtphub *hub = data; - gtphub_gc(hub, gtphub_now()); - osmo_timer_schedule(&hub->gc_timer, GTPH_GC_TICK_SECONDS, 0); -} - -static void gtphub_gc_start(struct gtphub *hub) -{ - osmo_timer_setup(&hub->gc_timer, gtphub_gc_cb, hub); - osmo_timer_schedule(&hub->gc_timer, GTPH_GC_TICK_SECONDS, 0); -} - -/* called by unit tests */ -void gtphub_init(struct gtphub *hub) -{ - gtphub_zero(hub); - - INIT_LLIST_HEAD(&hub->tunnels); - INIT_LLIST_HEAD(&hub->pending_deletes); - - expiry_init(&hub->expire_quickly, GTPH_EXPIRE_QUICKLY_SECS); - expiry_init(&hub->expire_slowly, GTPH_EXPIRE_SLOWLY_MINUTES * 60); - - nr_pool_init(&hub->tei_pool, 1, 0xffffffff); - - int side_idx; - int plane_idx; - for_each_side_and_plane(side_idx, plane_idx) { - gtphub_bind_init(&hub->to_gsns[side_idx][plane_idx]); - } - - hub->to_gsns[GTPH_SIDE_SGSN][GTPH_PLANE_CTRL].label = "SGSN Ctrl"; - hub->to_gsns[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL].label = "GGSN Ctrl"; - hub->to_gsns[GTPH_SIDE_SGSN][GTPH_PLANE_USER].label = "SGSN User"; - hub->to_gsns[GTPH_SIDE_GGSN][GTPH_PLANE_USER].label = "GGSN User"; -} - -/* For the test suite, this is kept separate from gtphub_stop(), which also - * closes sockets. The test suite avoids using sockets and would cause - * segfaults when trying to close uninitialized ofds. */ -void gtphub_free(struct gtphub *hub) -{ - /* By expiring all mappings, a garbage collection should free - * everything else. A gtphub_bind_free() will assert that everything is - * indeed empty. */ - expiry_clear(&hub->expire_quickly); - expiry_clear(&hub->expire_slowly); - - int side_idx; - int plane_idx; - for_each_side_and_plane(side_idx, plane_idx) { - gtphub_gc_bind(&hub->to_gsns[side_idx][plane_idx]); - gtphub_bind_free(&hub->to_gsns[side_idx][plane_idx]); - } -} - -void gtphub_stop(struct gtphub *hub) -{ - int side_idx; - int plane_idx; - for_each_side_and_plane(side_idx, plane_idx) { - gtphub_bind_stop(&hub->to_gsns[side_idx][plane_idx]); - } - gtphub_free(hub); -} - -static int gtphub_make_proxy(struct gtphub *hub, - struct gtphub_peer_port **pp, - struct gtphub_bind *bind, - const struct gtphub_cfg_addr *addr) -{ - if (!addr->addr_str) - return 0; - - struct gsn_addr gsna; - if (gsn_addr_from_str(&gsna, addr->addr_str) != 0) - return -1; - - *pp = gtphub_port_have(hub, bind, &gsna, addr->port); - - /* This is *the* proxy. Make sure it is never expired. */ - gtphub_port_ref_count_inc(*pp); - return 0; -} - -int gtphub_start(struct gtphub *hub, struct gtphub_cfg *cfg, - uint8_t restart_counter) -{ - gtphub_init(hub); - - hub->restart_counter = restart_counter; - hub->sgsn_use_sender = cfg->sgsn_use_sender? 1 : 0; - - /* If a Ctrl plane proxy is configured, ares will never be used. */ - if (!cfg->proxy[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL].addr_str) { - if (gtphub_ares_init(hub) != 0) { - LOG(LOGL_FATAL, "Failed to initialize ares\n"); - return -1; - } - } - - int side_idx; - int plane_idx; - for_each_side_and_plane(side_idx, plane_idx) { - int rc; - rc = gtphub_bind_start(&hub->to_gsns[side_idx][plane_idx], - &cfg->to_gsns[side_idx][plane_idx], - (side_idx == GTPH_SIDE_SGSN) - ? from_sgsns_read_cb - : from_ggsns_read_cb, - hub, plane_idx); - if (rc) { - LOG(LOGL_FATAL, "Failed to bind for %ss (%s)\n", - gtphub_side_idx_names[side_idx], - gtphub_plane_idx_names[plane_idx]); - return rc; - } - } - - for_each_side_and_plane(side_idx, plane_idx) { - if (gtphub_make_proxy(hub, - &hub->proxy[side_idx][plane_idx], - &hub->to_gsns[side_idx][plane_idx], - &cfg->proxy[side_idx][plane_idx]) - != 0) { - LOG(LOGL_FATAL, "Cannot configure %s proxy" - " %s port %d.\n", - gtphub_side_idx_names[side_idx], - cfg->proxy[side_idx][plane_idx].addr_str, - (int)cfg->proxy[side_idx][plane_idx].port); - return -1; - } - } - - for_each_side_and_plane(side_idx, plane_idx) { - if (hub->proxy[side_idx][plane_idx]) - LOG(LOGL_NOTICE, "Using %s %s proxy %s\n", - gtphub_side_idx_names[side_idx], - gtphub_plane_idx_names[plane_idx], - gtphub_port_str(hub->proxy[side_idx][plane_idx])); - } - - if (hub->sgsn_use_sender) - LOG(LOGL_NOTICE, "Using sender address and port for SGSN instead of GSN Addr IE and default ports.\n"); - - gtphub_gc_start(hub); - return 0; -} - -static struct gtphub_peer_addr *gtphub_peer_find_addr(const struct gtphub_peer *peer, - const struct gsn_addr *addr) -{ - struct gtphub_peer_addr *a; - llist_for_each_entry(a, &peer->addresses, entry) { - if (gsn_addr_same(&a->addr, addr)) - return a; - } - return NULL; -} - -static struct gtphub_peer_port *gtphub_addr_find_port(const struct gtphub_peer_addr *a, - uint16_t port) -{ - OSMO_ASSERT(port); - struct gtphub_peer_port *pp; - llist_for_each_entry(pp, &a->ports, entry) { - if (pp->port == port) - return pp; - } - return NULL; -} - -static struct gtphub_peer_addr *gtphub_addr_find(const struct gtphub_bind *bind, - const struct gsn_addr *addr) -{ - struct gtphub_peer *peer; - llist_for_each_entry(peer, &bind->peers, entry) { - struct gtphub_peer_addr *a = gtphub_peer_find_addr(peer, addr); - if (a) - return a; - } - return NULL; -} - -static struct gtphub_peer_port *gtphub_port_find(const struct gtphub_bind *bind, - const struct gsn_addr *addr, - uint16_t port) -{ - struct gtphub_peer_addr *a = gtphub_addr_find(bind, addr); - if (!a) - return NULL; - return gtphub_addr_find_port(a, port); -} - -struct gtphub_peer_port *gtphub_port_find_sa(const struct gtphub_bind *bind, - const struct osmo_sockaddr *addr) -{ - struct gsn_addr gsna; - uint16_t port; - gsn_addr_from_sockaddr(&gsna, &port, addr); - return gtphub_port_find(bind, &gsna, port); -} - -static struct gtphub_peer *gtphub_peer_new(struct gtphub *hub, - struct gtphub_bind *bind) -{ - struct gtphub_peer *peer = talloc_zero(osmo_gtphub_ctx, - struct gtphub_peer); - OSMO_ASSERT(peer); - - INIT_LLIST_HEAD(&peer->addresses); - - nr_pool_init(&peer->seq_pool, 0, 0xffff); - nr_map_init(&peer->seq_map, &peer->seq_pool, &hub->expire_quickly); - - /* TODO use something random to pick the initial sequence nr. - 0x6d31 produces the ASCII character sequence 'm1', currently used in - gtphub_nc_test.sh. */ - peer->seq_pool.last_nr = 0x6d31 - 1; - - llist_add(&peer->entry, &bind->peers); - return peer; -} - -static struct gtphub_peer_addr *gtphub_peer_add_addr(struct gtphub_peer *peer, - const struct gsn_addr *addr) -{ - struct gtphub_peer_addr *a; - a = talloc_zero(osmo_gtphub_ctx, struct gtphub_peer_addr); - OSMO_ASSERT(a); - a->peer = peer; - gsn_addr_copy(&a->addr, addr); - INIT_LLIST_HEAD(&a->ports); - llist_add(&a->entry, &peer->addresses); - - return a; -} - -static struct gtphub_peer_addr *gtphub_addr_have(struct gtphub *hub, - struct gtphub_bind *bind, - const struct gsn_addr *addr) -{ - struct gtphub_peer_addr *a = gtphub_addr_find(bind, addr); - if (a) - return a; - - /* If we haven't found an address, that means we need to create an - * entirely new peer for the new address. More addresses may be added - * to this peer later, but not via this function. */ - struct gtphub_peer *peer = gtphub_peer_new(hub, bind); - - a = gtphub_peer_add_addr(peer, addr); - - LOG(LOGL_DEBUG, "New peer address: %s %s\n", - bind->label, - gsn_addr_to_str(&a->addr)); - - return a; -} - -static struct gtphub_peer_port *gtphub_addr_add_port(struct gtphub_peer_addr *a, - uint16_t port) -{ - struct gtphub_peer_port *pp; - - pp = talloc_zero(osmo_gtphub_ctx, struct gtphub_peer_port); - OSMO_ASSERT(pp); - pp->peer_addr = a; - pp->port = port; - pp->last_restart_count = -1; - - if (gsn_addr_to_sockaddr(&a->addr, port, &pp->sa) != 0) { - talloc_free(pp); - return NULL; - } - - pp->counters_io = rate_ctr_group_alloc(osmo_gtphub_ctx, - >phub_ctrg_io_desc, 0); - if (!pp->counters_io) { - talloc_free(pp); - return NULL; - } - - llist_add(&pp->entry, &a->ports); - - LOG(LOGL_DEBUG, "New peer port: %s port %d\n", - gsn_addr_to_str(&a->addr), - (int)port); - - return pp; -} - -struct gtphub_peer_port *gtphub_port_have(struct gtphub *hub, - struct gtphub_bind *bind, - const struct gsn_addr *addr, - uint16_t port) -{ - struct gtphub_peer_addr *a = gtphub_addr_have(hub, bind, addr); - - struct gtphub_peer_port *pp = gtphub_addr_find_port(a, port); - if (pp) - return pp; - - return gtphub_addr_add_port(a, port); -} - -/* Find a GGSN peer with a matching address. If the address is known but the - * port not, create a new port for that peer address. */ -struct gtphub_peer_port *gtphub_known_addr_have_port(const struct gtphub_bind *bind, - const struct osmo_sockaddr *addr) -{ - struct gtphub_peer_addr *pa; - struct gtphub_peer_port *pp; - - struct gsn_addr gsna; - uint16_t port; - gsn_addr_from_sockaddr(&gsna, &port, addr); - - pa = gtphub_addr_find(bind, &gsna); - if (!pa) - return NULL; - - pp = gtphub_addr_find_port(pa, port); - - if (!pp) - pp = gtphub_addr_add_port(pa, port); - - return pp; -} - - -/* Return 0 if the message in p is not applicable for GGSN resolution, -1 if - * resolution should be possible but failed, and 1 if resolution was - * successful. *pp will be set to NULL if <1 is returned. */ -static int gtphub_resolve_ggsn(struct gtphub *hub, - struct gtp_packet_desc *p, - struct gtphub_peer_port **pp) -{ - *pp = NULL; - - /* TODO determine from message type whether IEs should be present? */ - - int rc; - const char *imsi_str; - rc = get_ie_imsi_str(p->ie, 0, &imsi_str); - if (rc < 1) - return rc; - OSMO_ASSERT(imsi_str); - - const char *apn_str; - rc = get_ie_apn_str(p->ie, &apn_str); - if (rc < 1) - return rc; - OSMO_ASSERT(apn_str); - - *pp = gtphub_resolve_ggsn_addr(hub, imsi_str, apn_str); - return (*pp)? 1 : -1; -} - - -/* TODO move to osmocom/core/socket.c ? */ -/* use this in osmo_sock_init() to remove dup. */ -/* Internal: call getaddrinfo for osmo_sockaddr_init(). The caller is required - to call freeaddrinfo(*result), iff zero is returned. */ -static int _osmo_getaddrinfo(struct addrinfo **result, - uint16_t family, uint16_t type, uint8_t proto, - const char *host, uint16_t port) -{ - struct addrinfo hints; - char portbuf[16]; - - sprintf(portbuf, "%u", port); - memset(&hints, '\0', sizeof(struct addrinfo)); - hints.ai_family = family; - if (type == SOCK_RAW) { - /* Workaround for glibc, that returns EAI_SERVICE (-8) if - * SOCK_RAW and IPPROTO_GRE is used. - */ - hints.ai_socktype = SOCK_DGRAM; - hints.ai_protocol = IPPROTO_UDP; - } else { - hints.ai_socktype = type; - hints.ai_protocol = proto; - } - - return getaddrinfo(host, portbuf, &hints, result); -} - -/* TODO move to osmocom/core/socket.c ? */ -int osmo_sockaddr_init(struct osmo_sockaddr *addr, - uint16_t family, uint16_t type, uint8_t proto, - const char *host, uint16_t port) -{ - struct addrinfo *res; - int rc; - rc = _osmo_getaddrinfo(&res, family, type, proto, host, port); - - if (rc != 0) { - LOG(LOGL_ERROR, "getaddrinfo returned error %d\n", (int)rc); - return -EINVAL; - } - - OSMO_ASSERT(res->ai_addrlen <= sizeof(addr->a)); - memcpy(&addr->a, res->ai_addr, res->ai_addrlen); - addr->l = res->ai_addrlen; - freeaddrinfo(res); - - return 0; -} - -int osmo_sockaddr_to_strs(char *addr_str, size_t addr_str_len, - char *port_str, size_t port_str_len, - const struct osmo_sockaddr *addr, - int flags) -{ - int rc; - - if ((addr->l < 1) || (addr->l > sizeof(addr->a))) { - LOGP(DGTPHUB, LOGL_ERROR, "Invalid address size: %d\n", addr->l); - return -1; - } - - if (addr->l > sizeof(addr->a)) { - LOGP(DGTPHUB, LOGL_ERROR, "Invalid address: too long: %d\n", - addr->l); - return -1; - } - - rc = getnameinfo((struct sockaddr*)&addr->a, addr->l, - addr_str, addr_str_len, - port_str, port_str_len, - flags); - - if (rc) - LOGP(DGTPHUB, LOGL_ERROR, "Invalid address: %s: %s\n", - gai_strerror(rc), osmo_hexdump((uint8_t*)&addr->a, - addr->l)); - - return rc; -} - -const char *osmo_sockaddr_to_strb(const struct osmo_sockaddr *addr, - char *buf, size_t buf_len) -{ - const int portbuf_len = 6; - OSMO_ASSERT(buf_len > portbuf_len); - char *portbuf = buf + buf_len - portbuf_len; - buf_len -= portbuf_len; - if (osmo_sockaddr_to_strs(buf, buf_len, - portbuf, portbuf_len, - addr, - NI_NUMERICHOST | NI_NUMERICSERV)) - return NULL; - - char *pos = buf + strnlen(buf, buf_len-1); - size_t len = buf_len - (pos - buf); - - snprintf(pos, len, " port %s", portbuf); - buf[buf_len-1] = '\0'; - - return buf; -} - -const char *osmo_sockaddr_to_str(const struct osmo_sockaddr *addr) -{ - static char buf[256]; - const char *result = osmo_sockaddr_to_strb(addr, buf, sizeof(buf)); - if (! result) - return "(invalid)"; - return result; -} - -int osmo_sockaddr_cmp(const struct osmo_sockaddr *a, - const struct osmo_sockaddr *b) -{ - if (a == b) - return 0; - if (!a) - return -1; - if (!b) - return 1; - if (a->l != b->l) { - /* Lengths are not the same, but determine the order. Will - * anyone ever sort a list by osmo_sockaddr though...? */ - int cmp = memcmp(&a->a, &b->a, (a->l < b->l)? a->l : b->l); - if (cmp == 0) { - if (a->l < b->l) - return -1; - else - return 1; - } - return cmp; - } - return memcmp(&a->a, &b->a, a->l); -} - -void osmo_sockaddr_copy(struct osmo_sockaddr *dst, - const struct osmo_sockaddr *src) -{ - OSMO_ASSERT(src->l <= sizeof(dst->a)); - memcpy(&dst->a, &src->a, src->l); - dst->l = src->l; -} diff --git a/openbsc/src/gprs/gtphub_ares.c b/openbsc/src/gprs/gtphub_ares.c deleted file mode 100644 index afeeda657..000000000 --- a/openbsc/src/gprs/gtphub_ares.c +++ /dev/null @@ -1,220 +0,0 @@ -/* GTP Hub Implementation */ - -/* (C) 2015 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> - * All Rights Reserved - * - * gtphub_ares.c. - * - * This file is kept separate so that these functions can be wrapped for - * gtphub_test.c. When a function and its callers are in the same compilational - * unit, the wrappability may be optimized away. - * - * Author: Neels Hofmeyr - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <string.h> -#include <unistd.h> - -#include <openbsc/gtphub.h> -#include <openbsc/debug.h> - -#include <osmocom/core/utils.h> -#include <osmocom/gsm/apn.h> - -/* TODO split GRX ares from sgsn into a separate struct and allow use without - * globals. */ -#include <openbsc/sgsn.h> -extern struct sgsn_instance *sgsn; - -struct sgsn_instance sgsn_inst = { 0 }; -struct sgsn_instance *sgsn = &sgsn_inst; - -extern void *osmo_gtphub_ctx; - -int gtphub_ares_init(struct gtphub *hub) -{ - return sgsn_ares_init(sgsn); -} - -struct ggsn_lookup { - struct llist_head entry; - struct expiring_item expiry_entry; - - struct gtphub *hub; - - char imsi_str[GSM23003_IMSI_MAX_DIGITS+1]; - char apn_ni_str[GSM_APN_LENGTH]; - char apn_oi_str[GSM_APN_LENGTH]; - int have_3dig_mnc; -}; - -static int start_ares_query(struct ggsn_lookup *lookup); - -static void ggsn_lookup_cb(void *arg, int status, int timeouts, - struct hostent *hostent) -{ - struct ggsn_lookup *lookup = arg; - LOGP(DGTPHUB, LOGL_NOTICE, "ggsn_lookup_cb(%p / %p)", lookup, - &lookup->expiry_entry); - - if (status != ARES_SUCCESS) { - LOGP(DGTPHUB, LOGL_ERROR, "DNS query failed.\n"); - - /* Need to try with three digits now */ - if (!lookup->have_3dig_mnc) { - lookup->have_3dig_mnc = 1; - if (start_ares_query(lookup) == 0) - return; - } - - LOGP(DGTPHUB, LOGL_ERROR, "Failed to resolve GGSN. (%p)\n", - lookup); - goto remove_from_queue; - } - - struct gsn_addr resolved_addr; - if (hostent->h_length > sizeof(resolved_addr.buf)) { - LOGP(DGTPHUB, LOGL_ERROR, "Addr size too large: %d > %d\n", - (int)hostent->h_length, (int)sizeof(resolved_addr.buf)); - goto remove_from_queue; - } - - /* Get the first addr from the list */ - char *addr0 = hostent->h_addr_list[0]; - if (!addr0) { - LOGP(DGTPHUB, LOGL_ERROR, "No host address.\n"); - goto remove_from_queue; - } - - memcpy(resolved_addr.buf, addr0, hostent->h_length); - resolved_addr.len = hostent->h_length; - - LOGP(DGTPHUB, LOGL_NOTICE, "resolved addr %s\n", - osmo_hexdump((unsigned char*)&resolved_addr, - sizeof(resolved_addr))); - - gtphub_resolved_ggsn(lookup->hub, lookup->apn_oi_str, &resolved_addr, - gtphub_now()); - -remove_from_queue: - LOGP(DGTPHUB, LOGL_ERROR, "Removing GGSN lookup. (%p / %p)\n", lookup, - &lookup->expiry_entry); - expiring_item_del(&lookup->expiry_entry); -} - -static void make_addr_str(struct ggsn_lookup *lookup) -{ - char *apn_oi_str; - apn_oi_str = osmo_apn_qualify_from_imsi(lookup->imsi_str, - lookup->apn_ni_str, - lookup->have_3dig_mnc); - osmo_strlcpy(lookup->apn_oi_str, apn_oi_str, - sizeof(lookup->apn_oi_str)); -} - -static int start_ares_query(struct ggsn_lookup *lookup) -{ - LOGP(DGTPHUB, LOGL_DEBUG, "Going to query %s (%p / %p)\n", - lookup->apn_oi_str, lookup, &lookup->expiry_entry); - - int rc = sgsn_ares_query(sgsn, lookup->apn_oi_str, ggsn_lookup_cb, - lookup); - if (rc != 0) - LOGP(DGTPHUB, LOGL_ERROR, "Failed to start ares query.\n"); - return rc; -} - -static void ggsn_lookup_del_cb(struct expiring_item *expi) -{ - struct ggsn_lookup *lookup; - lookup = container_of(expi, struct ggsn_lookup, expiry_entry); - - LOGP(DGTPHUB, LOGL_NOTICE, "ggsn_lookup_del_cb(%p / %p)\n", lookup, - expi); - - lookup->expiry_entry.del_cb = 0; - expiring_item_del(expi); - - llist_del(&lookup->entry); - talloc_free(lookup); -} - -struct gtphub_peer_port *gtphub_resolve_ggsn_addr(struct gtphub *hub, - const char *imsi_str, - const char *apn_ni_str) -{ - OSMO_ASSERT(imsi_str); - OSMO_ASSERT(apn_ni_str); - - struct ggsn_lookup *lookup = talloc_zero(osmo_gtphub_ctx, - struct ggsn_lookup); - OSMO_ASSERT(lookup); - - LOGP(DGTPHUB, LOGL_DEBUG, "Request to resolve IMSI" - " '%s' with APN-NI '%s' (%p / %p)\n", - imsi_str, apn_ni_str, lookup, &lookup->expiry_entry); - - expiring_item_init(&lookup->expiry_entry); - lookup->hub = hub; - - osmo_strlcpy(lookup->imsi_str, imsi_str, sizeof(lookup->imsi_str)); - osmo_strlcpy(lookup->apn_ni_str, apn_ni_str, - sizeof(lookup->apn_ni_str)); - - make_addr_str(lookup); - - struct ggsn_lookup *active; - llist_for_each_entry(active, &hub->ggsn_lookups, entry) { - if (strncmp(active->apn_oi_str, lookup->apn_oi_str, - sizeof(lookup->apn_oi_str)) == 0) { - LOGP(DGTPHUB, LOGL_DEBUG, - "Query already pending for %s\n", - lookup->apn_oi_str); - /* A query already pending. Just tip our hat. */ - return NULL; - } - } - - struct gtphub_resolved_ggsn *resolved; - llist_for_each_entry(resolved, &hub->resolved_ggsns, entry) { - if (strncmp(resolved->apn_oi_str, lookup->apn_oi_str, - sizeof(lookup->apn_oi_str)) == 0) { - LOGP(DGTPHUB, LOGL_DEBUG, - "GGSN resolved from cache: %s -> %s\n", - lookup->apn_oi_str, - gtphub_port_str(resolved->peer)); - return resolved->peer; - } - } - - /* Kick off a resolution, but so far return nothing. The hope is that - * the peer will resend the request (a couple of times), and by then - * the GGSN will be resolved. */ - LOGP(DGTPHUB, LOGL_DEBUG, - "Sending out DNS query for %s..." - " (Returning failure, hoping for a retry once resolution" - " has concluded)\n", - lookup->apn_oi_str); - - llist_add(&lookup->entry, &hub->ggsn_lookups); - - lookup->expiry_entry.del_cb = ggsn_lookup_del_cb; - expiry_add(&hub->expire_quickly, &lookup->expiry_entry, gtphub_now()); - - start_ares_query(lookup); - - return NULL; -} diff --git a/openbsc/src/gprs/gtphub_main.c b/openbsc/src/gprs/gtphub_main.c deleted file mode 100644 index 2b87d19ef..000000000 --- a/openbsc/src/gprs/gtphub_main.c +++ /dev/null @@ -1,359 +0,0 @@ -/* GTP Hub main program */ - -/* (C) 2015 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> - * All Rights Reserved - * - * Author: Neels Hofmeyr - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <unistd.h> -#include <signal.h> -#include <string.h> -#include <errno.h> -#include <inttypes.h> -#include <sys/stat.h> - -#define _GNU_SOURCE -#include <getopt.h> - -#include <osmocom/core/signal.h> -#include <osmocom/core/application.h> -#include <osmocom/core/logging.h> -#include <osmocom/core/utils.h> -#include <osmocom/core/rate_ctr.h> - -#include <osmocom/vty/logging.h> -#include <osmocom/vty/telnet_interface.h> -#include <osmocom/vty/ports.h> - -#include <openbsc/debug.h> -#include <openbsc/gtphub.h> -#include <openbsc/vty.h> - -#include "../../bscconfig.h" - -extern void *osmo_gtphub_ctx; - - -const char *gtphub_copyright = - "Copyright (C) 2015 sysmocom s.f.m.c GmbH <info@sysmocom.de>\r\n" - "License AGPLv3+: GNU AGPL version 2 or later <http://gnu.org/licenses/agpl-3.0.html>\r\n" - "This is free software: you are free to change and redistribute it.\r\n" - "There is NO WARRANTY, to the extent permitted by law.\r\n"; - -static struct log_info_cat gtphub_categories[] = { - [DGTPHUB] = { - .name = "DGTPHUB", - .description = "GTP Hub", - .color = "\033[1;33m", - .enabled = 1, - .loglevel = LOGL_INFO, - }, -}; - -int gtphub_log_filter_fn(const struct log_context *ctx, - struct log_target *tar) -{ - return 0; -} - -static const struct log_info gtphub_log_info = { - .filter_fn = gtphub_log_filter_fn, - .cat = gtphub_categories, - .num_cat = ARRAY_SIZE(gtphub_categories), -}; - -void log_cfg(struct gtphub_cfg *cfg) -{ - int side_idx, plane_idx; - for_each_side_and_plane(side_idx, plane_idx) { - struct gtphub_cfg_addr *a; - a = &cfg->to_gsns[side_idx][plane_idx].bind; - LOGP(DGTPHUB, LOGL_NOTICE, - "to-%ss bind, %s: %s port %d\n", - gtphub_side_idx_names[side_idx], - gtphub_plane_idx_names[plane_idx], - a->addr_str, a->port); - } -} - -static void signal_handler(int signal) -{ - fprintf(stdout, "signal %d received\n", signal); - - switch (signal) { - case SIGINT: - case SIGTERM: - osmo_signal_dispatch(SS_L_GLOBAL, S_L_GLOBAL_SHUTDOWN, NULL); - sleep(1); - exit(0); - break; - case SIGABRT: - /* in case of abort, we want to obtain a talloc report - * and then return to the caller, who will abort the process */ - case SIGUSR1: - case SIGUSR2: - talloc_report_full(osmo_gtphub_ctx, stderr); - break; - default: - break; - } -} - -extern int bsc_vty_go_parent(struct vty *vty); - -static struct vty_app_info vty_info = { - .name = "OsmoGTPhub", - .version = PACKAGE_VERSION, - .go_parent_cb = bsc_vty_go_parent, - .is_config_node = bsc_vty_is_config_node, -}; - -struct cmdline_cfg { - const char *config_file; - const char *restart_counter_file; - int daemonize; -}; - -static uint8_t next_restart_count(const char *path) -{ - int umask_was = umask(022); - - uint8_t counter = 0; - - FILE *f = fopen(path, "r"); - if (f) { - int rc = fscanf(f, "%hhu", &counter); - - if (rc != 1) - goto failed_to_read; - - char c; - while (fread(&c, 1, 1, f) > 0) { - switch (c) { - case ' ': - case '\t': - case '\n': - case '\r': - break; - default: - goto failed_to_read; - } - } - fclose(f); - } - - counter ++; - - f = fopen(path, "w"); - if (!f) - goto failed_to_write; - if (fprintf(f, "%" PRIu8 "\n", counter) < 2) - goto failed_to_write; - if (fclose(f)) { - f = NULL; - goto failed_to_write; - } - - umask(umask_was); - - LOGP(DGTPHUB, LOGL_NOTICE, "Restarted with counter %hhu\n", counter); - return counter; - -failed_to_read: - fclose(f); - umask(umask_was); - LOGP(DGTPHUB, LOGL_FATAL, "Restart counter file cannot be parsed:" - " %s\n", path); - exit(1); - -failed_to_write: - if (f) - fclose(f); - umask(umask_was); - LOGP(DGTPHUB, LOGL_FATAL, "Restart counter file cannot be written:" - " %s\n", path); - exit(1); -} - -static void print_help(struct cmdline_cfg *ccfg) -{ - printf("gtphub commandline options\n"); - printf(" -h,--help This text.\n"); - printf(" -D,--daemonize Fork the process into a background daemon.\n"); - printf(" -d,--debug <cat> Enable Debugging for this category.\n"); - printf(" Pass '-d list' to get a category listing.\n"); - printf(" -s,--disable-color\n"); - printf(" -c,--config-file <path> The config file to use [%s].\n", - ccfg->config_file); - printf(" -e,--log-level <nr> Set a global log level.\n"); - printf(" -r,--restart-file <path> File for counting restarts [%s].\n", - ccfg->restart_counter_file); -} - -static void list_categories(void) -{ - printf("Avaliable debug categories:\n"); - int i; - for (i = 0; i < gtphub_log_info.num_cat; ++i) { - if (!gtphub_log_info.cat[i].name) - continue; - - printf("%s\n", gtphub_log_info.cat[i].name); - } -} - -static void handle_options(struct cmdline_cfg *ccfg, int argc, char **argv) -{ - while (1) { - int option_index = 0, c; - static struct option long_options[] = { - {"help", 0, 0, 'h'}, - {"debug", 1, 0, 'd'}, - {"daemonize", 0, 0, 'D'}, - {"config-file", 1, 0, 'c'}, - {"disable-color", 0, 0, 's'}, - {"timestamp", 0, 0, 'T'}, - {"log-level", 1, 0, 'e'}, - {"restart-file", 1, 0, 'r'}, - {NULL, 0, 0, 0} - }; - - c = getopt_long(argc, argv, "hd:Dc:sTe:r:", - long_options, &option_index); - if (c == -1) { - if (optind < argc) { - LOGP(DGTPHUB, LOGL_FATAL, - "Excess commandline arguments ('%s').\n", - argv[optind]); - exit(2); - } - break; - } - - switch (c) { - case 'h': - //print_usage(); - print_help(ccfg); - exit(0); - case 's': - log_set_use_color(osmo_stderr_target, 0); - break; - case 'd': - if (strcmp("list", optarg) == 0) { - list_categories(); - exit(0); - } else - log_parse_category_mask(osmo_stderr_target, optarg); - break; - case 'D': - ccfg->daemonize = 1; - break; - case 'c': - ccfg->config_file = optarg; - break; - case 'T': - log_set_print_timestamp(osmo_stderr_target, 1); - break; - case 'e': - log_set_log_level(osmo_stderr_target, atoi(optarg)); - break; - case 'r': - ccfg->restart_counter_file = optarg; - break; - default: - LOGP(DGTPHUB, LOGL_FATAL, "Invalid command line argument, abort.\n"); - exit(1); - break; - } - } -} - -int main(int argc, char **argv) -{ - int rc; - - struct cmdline_cfg _ccfg; - struct cmdline_cfg *ccfg = &_ccfg; - memset(ccfg, '\0', sizeof(*ccfg)); - ccfg->config_file = "./gtphub.conf"; - ccfg->restart_counter_file = "./gtphub_restart_count"; - - struct gtphub_cfg _cfg; - struct gtphub_cfg *cfg = &_cfg; - memset(cfg, '\0', sizeof(*cfg)); - - struct gtphub _hub; - struct gtphub *hub = &_hub; - - osmo_gtphub_ctx = talloc_named_const(NULL, 0, "osmo_gtphub"); - msgb_talloc_ctx_init(osmo_gtphub_ctx, 0); - - signal(SIGINT, &signal_handler); - signal(SIGTERM, &signal_handler); - signal(SIGABRT, &signal_handler); - signal(SIGUSR1, &signal_handler); - signal(SIGUSR2, &signal_handler); - osmo_init_ignore_signals(); - - osmo_init_logging(>phub_log_info); - - vty_info.copyright = gtphub_copyright; - vty_init(&vty_info); - logging_vty_add_cmds(NULL); - gtphub_vty_init(hub, cfg); - - rate_ctr_init(osmo_gtphub_ctx); - - handle_options(ccfg, argc, argv); - - rc = gtphub_cfg_read(cfg, ccfg->config_file); - if (rc < 0) { - LOGP(DGTPHUB, LOGL_FATAL, "Cannot parse config file '%s'\n", - ccfg->config_file); - exit(2); - } - - /* start telnet after reading config for vty_get_bind_addr() */ - rc = telnet_init_dynif(osmo_gtphub_ctx, 0, vty_get_bind_addr(), - OSMO_VTY_PORT_GTPHUB); - if (rc < 0) - exit(1); - - if (gtphub_start(hub, cfg, - next_restart_count(ccfg->restart_counter_file)) - != 0) - return -1; - - log_cfg(cfg); - - if (ccfg->daemonize) { - rc = osmo_daemonize(); - if (rc < 0) { - LOGP(DGTPHUB, LOGL_FATAL, "Error during daemonize"); - exit(1); - } - } - - while (1) { - rc = osmo_select_main(0); - if (rc < 0) - exit(3); - } - - /* not reached */ - exit(0); -} diff --git a/openbsc/src/gprs/gtphub_sock.c b/openbsc/src/gprs/gtphub_sock.c deleted file mode 100644 index 60bebaaeb..000000000 --- a/openbsc/src/gprs/gtphub_sock.c +++ /dev/null @@ -1,60 +0,0 @@ -/* GTP Hub Implementation */ - -/* (C) 2015 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> - * All Rights Reserved - * - * gtphub_sock.c. - * - * This file is kept separate so that these functions can be wrapped for - * gtphub_test.c. When a function and its callers are in the same compilational - * unit, the wrappability may be optimized away. - * - * Author: Neels Hofmeyr - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <openbsc/gtphub.h> -#include <openbsc/debug.h> - -/* Convenience makro, note: only within this C file. */ -#define LOG(level, fmt, args...) \ - LOGP(DGTPHUB, level, fmt, ##args) - -int gtphub_write(const struct osmo_fd *to, - const struct osmo_sockaddr *to_addr, - const uint8_t *buf, size_t buf_len) -{ - errno = 0; - ssize_t sent = sendto(to->fd, buf, buf_len, 0, - (struct sockaddr*)&to_addr->a, to_addr->l); - LOG(LOGL_DEBUG, "to %s\n", osmo_sockaddr_to_str(to_addr)); - - if (sent == -1) { - LOG(LOGL_ERROR, "error: %s\n", strerror(errno)); - return -EINVAL; - } - - if (sent != buf_len) - LOG(LOGL_ERROR, "sent(%d) != data_len(%d)\n", - (int)sent, (int)buf_len); - else - LOG(LOGL_DEBUG, "Sent %d: %s%s\n", - (int)sent, - osmo_hexdump(buf, sent > 1000? 1000 : sent), - sent > 1000 ? "..." : ""); - - return 0; -} - diff --git a/openbsc/src/gprs/gtphub_vty.c b/openbsc/src/gprs/gtphub_vty.c deleted file mode 100644 index a30ad2a54..000000000 --- a/openbsc/src/gprs/gtphub_vty.c +++ /dev/null @@ -1,613 +0,0 @@ -/* (C) 2015 by sysmocom s.f.m.c. GmbH - * All Rights Reserved - * - * Author: Neels Hofmeyr - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <string.h> -#include <inttypes.h> - -#include <ares.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <arpa/inet.h> - -#include <osmocom/core/talloc.h> -#include <osmocom/vty/command.h> -#include <osmocom/vty/misc.h> - -#include <openbsc/vty.h> -#include <openbsc/gtphub.h> - -/* TODO split GRX ares from sgsn into a separate struct and allow use without - * globals. */ -#include <openbsc/sgsn.h> -extern struct sgsn_instance *sgsn; - -static struct gtphub *g_hub = 0; -static struct gtphub_cfg *g_cfg = 0; - -static struct cmd_node gtphub_node = { - GTPHUB_NODE, - "%s(config-gtphub)# ", - 1, -}; - -#define GTPH_DEFAULT_CONTROL_PORT 2123 -#define GTPH_DEFAULT_USER_PORT 2152 - -static void write_addrs(struct vty *vty, const char *name, - struct gtphub_cfg_addr *c, struct gtphub_cfg_addr *u) -{ - if ((c->port == GTPH_DEFAULT_CONTROL_PORT) - && (u->port == GTPH_DEFAULT_USER_PORT) - && (strcmp(c->addr_str, u->addr_str) == 0)) { - /* Default port numbers and same IP address: write "short" - * variant. */ - vty_out(vty, " %s %s%s", - name, - c->addr_str, - VTY_NEWLINE); - return; - } - - vty_out(vty, " %s ctrl %s %d user %s %d%s", - name, - c->addr_str, (int)c->port, - u->addr_str, (int)u->port, - VTY_NEWLINE); - - struct ares_addr_node *server; - for (server = sgsn->ares_servers; server; server = server->next) - vty_out(vty, " grx-dns-add %s%s", inet_ntoa(server->addr.addr4), VTY_NEWLINE); -} - -static int config_write_gtphub(struct vty *vty) -{ - vty_out(vty, "gtphub%s", VTY_NEWLINE); - - write_addrs(vty, "bind-to-sgsns", - &g_cfg->to_gsns[GTPH_SIDE_SGSN][GTPH_PLANE_CTRL].bind, - &g_cfg->to_gsns[GTPH_SIDE_SGSN][GTPH_PLANE_USER].bind); - - write_addrs(vty, "bind-to-ggsns", - &g_cfg->to_gsns[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL].bind, - &g_cfg->to_gsns[GTPH_SIDE_GGSN][GTPH_PLANE_USER].bind); - - if (g_cfg->sgsn_use_sender) { - vty_out(vty, "sgsn-use-sender%s", VTY_NEWLINE); - } - - if (g_cfg->proxy[GTPH_SIDE_SGSN][GTPH_PLANE_CTRL].addr_str) { - write_addrs(vty, "sgsn-proxy", - &g_cfg->proxy[GTPH_SIDE_SGSN][GTPH_PLANE_CTRL], - &g_cfg->proxy[GTPH_SIDE_SGSN][GTPH_PLANE_USER]); - } - - if (g_cfg->proxy[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL].addr_str) { - write_addrs(vty, "ggsn-proxy", - &g_cfg->proxy[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL], - &g_cfg->proxy[GTPH_SIDE_GGSN][GTPH_PLANE_USER]); - } - - return CMD_SUCCESS; -} - -DEFUN(cfg_gtphub, cfg_gtphub_cmd, - "gtphub", - "Configure the GTP hub\n") -{ - vty->node = GTPHUB_NODE; - return CMD_SUCCESS; -} - -#define BIND_ARGS "ctrl ADDR <0-65535> user ADDR <0-65535>" -#define BIND_DOCS \ - "Set GTP-C bind\n" \ - "GTP-C local IP address (v4 or v6)\n" \ - "GTP-C local port\n" \ - "Set GTP-U bind\n" \ - "GTP-U local IP address (v4 or v6)\n" \ - "GTP-U local port\n" - - -DEFUN(cfg_gtphub_bind_to_sgsns_short, cfg_gtphub_bind_to_sgsns_short_cmd, - "bind-to-sgsns ADDR", - "GTP Hub Parameters\n" - "Set the local bind address to listen for SGSNs, for both GTP-C and GTP-U\n" - "Local IP address (v4 or v6)\n" - ) -{ - int i; - for_each_plane(i) - g_cfg->to_gsns[GTPH_SIDE_SGSN][i].bind.addr_str = talloc_strdup(tall_vty_ctx, argv[0]); - g_cfg->to_gsns[GTPH_SIDE_SGSN][GTPH_PLANE_CTRL].bind.port = GTPH_DEFAULT_CONTROL_PORT; - g_cfg->to_gsns[GTPH_SIDE_SGSN][GTPH_PLANE_USER].bind.port = GTPH_DEFAULT_USER_PORT; - return CMD_SUCCESS; -} - -DEFUN(cfg_gtphub_bind_to_ggsns_short, cfg_gtphub_bind_to_ggsns_short_cmd, - "bind-to-ggsns ADDR", - "GTP Hub Parameters\n" - "Set the local bind address to listen for GGSNs, for both GTP-C and GTP-U\n" - "Local IP address (v4 or v6)\n" - ) -{ - int i; - for_each_plane(i) - g_cfg->to_gsns[GTPH_SIDE_GGSN][i].bind.addr_str = talloc_strdup(tall_vty_ctx, argv[0]); - g_cfg->to_gsns[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL].bind.port = GTPH_DEFAULT_CONTROL_PORT; - g_cfg->to_gsns[GTPH_SIDE_GGSN][GTPH_PLANE_USER].bind.port = GTPH_DEFAULT_USER_PORT; - return CMD_SUCCESS; -} - - -static int handle_binds(struct gtphub_cfg_bind *b, const char **argv) -{ - b[GTPH_PLANE_CTRL].bind.addr_str = talloc_strdup(tall_vty_ctx, argv[0]); - b[GTPH_PLANE_CTRL].bind.port = atoi(argv[1]); - b[GTPH_PLANE_USER].bind.addr_str = talloc_strdup(tall_vty_ctx, argv[2]); - b[GTPH_PLANE_USER].bind.port = atoi(argv[3]); - return CMD_SUCCESS; -} - -DEFUN(cfg_gtphub_bind_to_sgsns, cfg_gtphub_bind_to_sgsns_cmd, - "bind-to-sgsns " BIND_ARGS, - "GTP Hub Parameters\n" - "Set the local bind addresses and ports to listen for SGSNs\n" - BIND_DOCS - ) -{ - return handle_binds(g_cfg->to_gsns[GTPH_SIDE_SGSN], argv); -} - -DEFUN(cfg_gtphub_bind_to_ggsns, cfg_gtphub_bind_to_ggsns_cmd, - "bind-to-ggsns " BIND_ARGS, - "GTP Hub Parameters\n" - "Set the local bind addresses and ports to listen for GGSNs\n" - BIND_DOCS - ) -{ - return handle_binds(g_cfg->to_gsns[GTPH_SIDE_GGSN], argv); -} - -DEFUN(cfg_gtphub_ggsn_proxy_short, cfg_gtphub_ggsn_proxy_short_cmd, - "ggsn-proxy ADDR", - "GTP Hub Parameters\n" - "Redirect all GGSN bound traffic to default ports on this address (another gtphub)\n" - "Remote IP address (v4 or v6)\n" - ) -{ - g_cfg->proxy[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL].addr_str = talloc_strdup(tall_vty_ctx, argv[0]); - g_cfg->proxy[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL].port = GTPH_DEFAULT_CONTROL_PORT; - g_cfg->proxy[GTPH_SIDE_GGSN][GTPH_PLANE_USER].addr_str = talloc_strdup(tall_vty_ctx, argv[0]); - g_cfg->proxy[GTPH_SIDE_GGSN][GTPH_PLANE_USER].port = GTPH_DEFAULT_USER_PORT; - return CMD_SUCCESS; -} - -DEFUN(cfg_gtphub_ggsn_proxy, cfg_gtphub_ggsn_proxy_cmd, - "ggsn-proxy " BIND_ARGS, - "GTP Hub Parameters\n" - "Redirect all GGSN bound traffic to these addresses and ports (another gtphub)\n" - BIND_DOCS - ) -{ - g_cfg->proxy[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL].addr_str = talloc_strdup(tall_vty_ctx, argv[0]); - g_cfg->proxy[GTPH_SIDE_GGSN][GTPH_PLANE_CTRL].port = atoi(argv[1]); - g_cfg->proxy[GTPH_SIDE_GGSN][GTPH_PLANE_USER].addr_str = talloc_strdup(tall_vty_ctx, argv[2]); - g_cfg->proxy[GTPH_SIDE_GGSN][GTPH_PLANE_USER].port = atoi(argv[3]); - return CMD_SUCCESS; -} - -DEFUN(cfg_gtphub_sgsn_proxy_short, cfg_gtphub_sgsn_proxy_short_cmd, - "sgsn-proxy ADDR", - "GTP Hub Parameters\n" - "Redirect all SGSN bound traffic to default ports on this address (another gtphub)\n" - "Remote IP address (v4 or v6)\n" - ) -{ - g_cfg->proxy[GTPH_SIDE_SGSN][GTPH_PLANE_CTRL].addr_str = talloc_strdup(tall_vty_ctx, argv[0]); - g_cfg->proxy[GTPH_SIDE_SGSN][GTPH_PLANE_CTRL].port = GTPH_DEFAULT_CONTROL_PORT; - g_cfg->proxy[GTPH_SIDE_SGSN][GTPH_PLANE_USER].addr_str = talloc_strdup(tall_vty_ctx, argv[0]); - g_cfg->proxy[GTPH_SIDE_SGSN][GTPH_PLANE_USER].port = GTPH_DEFAULT_USER_PORT; - return CMD_SUCCESS; -} - -DEFUN(cfg_gtphub_sgsn_proxy, cfg_gtphub_sgsn_proxy_cmd, - "sgsn-proxy " BIND_ARGS, - "GTP Hub Parameters\n" - "Redirect all SGSN bound traffic to these addresses and ports (another gtphub)\n" - BIND_DOCS - ) -{ - g_cfg->proxy[GTPH_SIDE_SGSN][GTPH_PLANE_CTRL].addr_str = talloc_strdup(tall_vty_ctx, argv[0]); - g_cfg->proxy[GTPH_SIDE_SGSN][GTPH_PLANE_CTRL].port = atoi(argv[1]); - g_cfg->proxy[GTPH_SIDE_SGSN][GTPH_PLANE_USER].addr_str = talloc_strdup(tall_vty_ctx, argv[2]); - g_cfg->proxy[GTPH_SIDE_SGSN][GTPH_PLANE_USER].port = atoi(argv[3]); - return CMD_SUCCESS; -} - - -#define SGSN_USE_SENDER_STR \ - "Ignore SGSN's Address IEs, use sender address and port (useful over NAT)\n" - -DEFUN(cfg_gtphub_sgsn_use_sender, - cfg_gtphub_sgsn_use_sender_cmd, - "sgsn-use-sender", - SGSN_USE_SENDER_STR) -{ - g_cfg->sgsn_use_sender = 1; - return CMD_SUCCESS; -} - -DEFUN(cfg_gtphub_no_sgsn_use_sender, - cfg_gtphub_no_sgsn_use_sender_cmd, - "no sgsn-use-sender", - NO_STR SGSN_USE_SENDER_STR) -{ - g_cfg->sgsn_use_sender = 0; - return CMD_SUCCESS; -} - - -/* Copied from sgsn_vty.h */ -DEFUN(cfg_grx_ggsn, cfg_grx_ggsn_cmd, - "grx-dns-add A.B.C.D", - "Add DNS server\nIPv4 address\n") -{ - struct ares_addr_node *node = talloc_zero(tall_bsc_ctx, struct ares_addr_node); - node->family = AF_INET; - inet_aton(argv[0], &node->addr.addr4); - - node->next = sgsn->ares_servers; - sgsn->ares_servers = node; - return CMD_SUCCESS; -} - - -static void show_bind_stats_all(struct vty *vty) -{ - int plane_idx; - for_each_plane(plane_idx) { - vty_out(vty, "- %s Plane:%s", - gtphub_plane_idx_names[plane_idx], VTY_NEWLINE); - - int side_idx; - for_each_side(side_idx) { - struct gtphub_bind *b = &g_hub->to_gsns[side_idx][plane_idx]; - vty_out(vty, " - local addr to/from %ss: %s port %d%s", - gtphub_side_idx_names[side_idx], - gsn_addr_to_str(&b->local_addr), (int)b->local_port, - VTY_NEWLINE); - vty_out_rate_ctr_group(vty, " ", b->counters_io); - } - } -} - -static void show_tunnel_stats(struct vty *vty, struct gtphub_tunnel *tun) -{ - int plane_idx; - for_each_plane(plane_idx) { - vty_out(vty, "- %s Plane:%s", - gtphub_plane_idx_names[plane_idx], VTY_NEWLINE); - - int side_idx; - for_each_side(side_idx) { - struct gtphub_tunnel_endpoint *te = &tun->endpoint[side_idx][plane_idx]; - vty_out(vty, " - to/from %s:%s", - gtphub_side_idx_names[side_idx], - VTY_NEWLINE); - vty_out_rate_ctr_group(vty, " ", te->counters_io); - } - } -} - -static void show_peer_summary(struct vty *vty, const char *prefix, - int side_idx, int plane_idx, - struct gtphub_peer *p, int with_io_stats) -{ - struct gtphub_peer_addr *pa; - int p2l = strlen(prefix) + 4 + 1; - char prefix2[p2l]; - memset(prefix2, ' ', p2l - 1); - prefix2[p2l - 1] = '\0'; - - if (with_io_stats) { - llist_for_each_entry(pa, &p->addresses, entry) { - vty_out(vty, "%s- %s %s %s%s", prefix, - gtphub_side_idx_names[side_idx], - gtphub_plane_idx_names[plane_idx], - gsn_addr_to_str(&pa->addr), - VTY_NEWLINE); - - - struct gtphub_peer_port *pp; - llist_for_each_entry(pp, &pa->ports, entry) { - vty_out(vty, "%s Port %" PRIu16 "%s", prefix, pp->port, VTY_NEWLINE); - vty_out_rate_ctr_group(vty, prefix2, pp->counters_io); - } - } - } else { - llist_for_each_entry(pa, &p->addresses, entry) { - vty_out(vty, "%s- %s %s %s", prefix, - gtphub_side_idx_names[side_idx], - gtphub_plane_idx_names[plane_idx], - gsn_addr_to_str(&pa->addr)); - struct gtphub_peer_port *pp; - llist_for_each_entry(pp, &pa->ports, entry) { - vty_out(vty, ":%" PRIu16, pp->port); - } - vty_out(vty, VTY_NEWLINE); - } - } -} - -static void show_peers_summary(struct vty *vty) -{ - int side_idx; - int plane_idx; - - int count[GTPH_SIDE_N][GTPH_PLANE_N] = {{0}}; - - for_each_side(side_idx) { - for_each_plane(plane_idx) { - struct gtphub_peer *p; - llist_for_each_entry(p, &g_hub->to_gsns[side_idx][plane_idx].peers, entry) { - count[side_idx][plane_idx] ++; - } - } - } - - vty_out(vty, "Peers Count:%s", VTY_NEWLINE); - for_each_side_and_plane(side_idx, plane_idx) { - vty_out(vty, " %s %s peers: %d%s", - gtphub_side_idx_names[side_idx], - gtphub_plane_idx_names[plane_idx], - count[side_idx][plane_idx], - VTY_NEWLINE); - } -} - -static void show_peers_all(struct vty *vty, int with_io_stats) -{ - int side_idx; - int plane_idx; - - int count[GTPH_SIDE_N][GTPH_PLANE_N] = {{0}}; - - vty_out(vty, "All Peers%s%s", - with_io_stats? " with I/O stats" : "", - VTY_NEWLINE); - for_each_side(side_idx) { - vty_out(vty, "- %s%s", gtphub_side_idx_names[side_idx], VTY_NEWLINE); - for_each_plane(plane_idx) { - struct gtphub_peer *p; - llist_for_each_entry(p, &g_hub->to_gsns[side_idx][plane_idx].peers, entry) { - count[side_idx][plane_idx] ++; - show_peer_summary(vty, " ", side_idx, plane_idx, p, with_io_stats); - } - } - } - for_each_side_and_plane(side_idx, plane_idx) { - vty_out(vty, "%s %s peers: %d%s", - gtphub_side_idx_names[side_idx], - gtphub_plane_idx_names[plane_idx], - count[side_idx][plane_idx], - VTY_NEWLINE); - } -} - - -static void show_tunnels_summary(struct vty *vty) -{ - time_t now = gtphub_now(); - - const int w = 36; - int max_expiry = g_hub->expire_slowly.expiry_in_seconds; - float seconds_per_step = ((float)max_expiry) / w; - - /* Print TEI mapping expiry in an ASCII histogram, like: - TEI map summary - Legend: '_'=0 '.'<=1% ':'<=2% '|'<=10% '#'>10% (10.0 m/step) - CTRL: 30 mappings, valid for 360m[# :. | . : . ]1m - USER: 30 mappings, valid for 360m[# :. | . : . ]1m - 4 TEI mappings in total, last expiry in 359.4 min - */ - vty_out(vty, - "Tunnels summary%s" - " Legend: ' '=0 '.'<=1%% ':'<=2%% '|'<=10%% '#'>10%% (%.1f m/step)%s", - VTY_NEWLINE, - seconds_per_step / 60., - VTY_NEWLINE); - - int last_expiry = 0; - - unsigned int count = 0; - - int histogram[w]; - memset(histogram, 0, sizeof(histogram)); - - struct gtphub_tunnel *t; - llist_for_each_entry(t, &g_hub->tunnels, entry) { - count ++; - int expiry = t->expiry_entry.expiry - now; - last_expiry = (last_expiry > expiry) ? last_expiry : expiry; - - int hi = ((float)expiry) / seconds_per_step; - if (hi < 0) - hi = 0; - if (hi > (w - 1)) - hi = w - 1; - histogram[hi] ++; - } - - vty_out(vty, - " %u tunnels, valid for %dm[", - count, max_expiry / 60); - - int i; - for (i = w - 1; i >= 0; i--) { - char c; - int val = histogram[i]; - int percent = 100. * val / count; - if (!val) - c = ' '; - else if (percent <= 1) - c = '.'; - else if (percent <= 2) - c = ':'; - else if (percent <= 10) - c = '|'; - else c = '#'; - vty_out(vty, "%c", c); - } - vty_out(vty, "]1m%s", VTY_NEWLINE); - - vty_out(vty, " last expiry in %.1f min%s", - ((float)last_expiry) / 60., - VTY_NEWLINE); -} - -static void show_tunnels_all(struct vty *vty, int with_io_stats) -{ - time_t now = gtphub_now(); - - vty_out(vty, "All tunnels%s:%s" - "Legend: TEI=<hex>: SGSN <-> GGSN (expiry in minutes), with each:%s" - " <IP-Ctrl>[/<IP-User>] (TEI C=<TEI-Ctrl-hex> U=<TEI-User-hex>)%s", - with_io_stats? "with I/O stats" : "", - VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE); - - unsigned int count = 0; - unsigned int incomplete = 0; - struct gtphub_tunnel *tun; - llist_for_each_entry(tun, &g_hub->tunnels, entry) { - vty_out(vty, - "%s (expiry in %dm)%s", - gtphub_tunnel_str(tun), - (int)((tun->expiry_entry.expiry - now) / 60), - VTY_NEWLINE); - count ++; - if (!gtphub_tunnel_complete(tun)) - incomplete ++; - if (with_io_stats) - show_tunnel_stats(vty, tun); - } - vty_out(vty, "Total: %u tunnels (of which %u incomplete)%s", - count, incomplete, VTY_NEWLINE); -} - -#define SHOW_GTPHUB_STRS SHOW_STR "Show info on running GTP hub\n" -#define SHOW_GTPHUB_PEERS_STRS SHOW_GTPHUB_STRS "Active peers\n" -#define SHOW_GTPHUB_TUNS_STRS SHOW_GTPHUB_STRS "Active tunnels\n" - -DEFUN(show_gtphub_peers_summary, show_gtphub_peers_summary_cmd, "show gtphub peers summary", - SHOW_GTPHUB_PEERS_STRS "Summary of all peers\n") -{ - show_peers_summary(vty); - return CMD_SUCCESS; -} - -DEFUN(show_gtphub_peers_list, show_gtphub_peers_list_cmd, "show gtphub peers list", - SHOW_GTPHUB_PEERS_STRS "List all peers\n") -{ - show_peers_all(vty, 0); - return CMD_SUCCESS; -} - -DEFUN(show_gtphub_peers_stats, show_gtphub_peers_stats_cmd, "show gtphub peers stats", - SHOW_GTPHUB_PEERS_STRS "List all peers with I/O stats\n") -{ - show_peers_all(vty, 1); - return CMD_SUCCESS; -} - -DEFUN(show_gtphub_tunnels_summary, show_gtphub_tunnels_summary_cmd, "show gtphub tunnels summary", - SHOW_GTPHUB_TUNS_STRS "Summary of all tunnels\n") -{ - show_tunnels_summary(vty); - return CMD_SUCCESS; -} - -DEFUN(show_gtphub_tunnels_list, show_gtphub_tunnels_list_cmd, "show gtphub tunnels list", - SHOW_GTPHUB_TUNS_STRS "List all tunnels\n") -{ - show_tunnels_all(vty, 0); - return CMD_SUCCESS; -} - -DEFUN(show_gtphub_tunnels_stats, show_gtphub_tunnels_stats_cmd, "show gtphub tunnels stats", - SHOW_GTPHUB_TUNS_STRS "List all tunnels with I/O stats\n") -{ - show_tunnels_all(vty, 1); - return CMD_SUCCESS; -} - -DEFUN(show_gtphub, show_gtphub_cmd, "show gtphub all", - SHOW_GTPHUB_STRS "Summarize everything about the GTP hub\n") -{ - show_bind_stats_all(vty); - show_peers_summary(vty); - show_tunnels_summary(vty); - return CMD_SUCCESS; -} - - -int gtphub_vty_init(struct gtphub *global_hub, struct gtphub_cfg *global_cfg) -{ - g_hub = global_hub; - g_cfg = global_cfg; - - install_element_ve(&show_gtphub_cmd); - install_element_ve(&show_gtphub_peers_summary_cmd); - install_element_ve(&show_gtphub_peers_list_cmd); - install_element_ve(&show_gtphub_peers_stats_cmd); - install_element_ve(&show_gtphub_tunnels_summary_cmd); - install_element_ve(&show_gtphub_tunnels_list_cmd); - install_element_ve(&show_gtphub_tunnels_stats_cmd); - - install_element(CONFIG_NODE, &cfg_gtphub_cmd); - install_node(>phub_node, config_write_gtphub); - vty_install_default(GTPHUB_NODE); - - install_element(GTPHUB_NODE, &cfg_gtphub_bind_to_sgsns_short_cmd); - install_element(GTPHUB_NODE, &cfg_gtphub_bind_to_sgsns_cmd); - install_element(GTPHUB_NODE, &cfg_gtphub_bind_to_ggsns_short_cmd); - install_element(GTPHUB_NODE, &cfg_gtphub_bind_to_ggsns_cmd); - install_element(GTPHUB_NODE, &cfg_gtphub_ggsn_proxy_short_cmd); - install_element(GTPHUB_NODE, &cfg_gtphub_ggsn_proxy_cmd); - install_element(GTPHUB_NODE, &cfg_gtphub_sgsn_proxy_short_cmd); - install_element(GTPHUB_NODE, &cfg_gtphub_sgsn_proxy_cmd); - install_element(GTPHUB_NODE, &cfg_gtphub_sgsn_use_sender_cmd); - install_element(GTPHUB_NODE, &cfg_gtphub_no_sgsn_use_sender_cmd); - install_element(GTPHUB_NODE, &cfg_grx_ggsn_cmd); - - return 0; -} - -int gtphub_cfg_read(struct gtphub_cfg *cfg, const char *config_file) -{ - int rc; - - rc = vty_read_config_file(config_file, NULL); - if (rc < 0) { - fprintf(stderr, "Failed to parse the config file: '%s'\n", config_file); - return rc; - } - - return 0; -} diff --git a/openbsc/src/gprs/osmo_sgsn.cfg b/openbsc/src/gprs/osmo_sgsn.cfg deleted file mode 100644 index c4c9ec1cf..000000000 --- a/openbsc/src/gprs/osmo_sgsn.cfg +++ /dev/null @@ -1,23 +0,0 @@ -! -! Osmocom SGSN (0.9.0.474-0ede2) configuration saved from vty -!! -! -line vty - no login -! -sgsn - gtp local-ip 192.168.100.11 - ggsn 0 remote-ip 192.168.100.239 - ggsn 0 gtp-version 1 -ns - timer tns-block 3 - timer tns-block-retries 3 - timer tns-reset 3 - timer tns-reset-retries 3 - timer tns-test 30 - timer tns-alive 3 - timer tns-alive-retries 10 - encapsulation udp local-ip 192.168.100.11 - encapsulation udp local-port 23000 - encapsulation framerelay-gre enabled 0 -bssgp diff --git a/openbsc/src/gprs/sgsn_ares.c b/openbsc/src/gprs/sgsn_ares.c deleted file mode 100644 index d94d184a3..000000000 --- a/openbsc/src/gprs/sgsn_ares.c +++ /dev/null @@ -1,173 +0,0 @@ -/* C-ARES DNS resolver integration */ - -/* - * (C) 2015 by Holger Hans Peter Freyther - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <openbsc/sgsn.h> -#include <openbsc/debug.h> - -#include <netdb.h> - -struct cares_event_fd { - struct llist_head head; - struct osmo_fd fd; -}; - -struct cares_cb_data { - ares_host_callback cb; - void *data; -}; - -static void osmo_ares_reschedule(struct sgsn_instance *sgsn); -static void ares_cb(void *_arg, int status, int timeouts, struct hostent *hostent) -{ - struct cares_cb_data *arg = _arg; - - arg->cb(arg->data, status, timeouts, hostent); - osmo_ares_reschedule(sgsn); - talloc_free(arg); -} - -static int ares_osmo_fd_cb(struct osmo_fd *fd, unsigned int what) -{ - LOGP(DGPRS, LOGL_DEBUG, "C-ares fd(%d) ready(%d)\n", fd->fd, what); - - ares_process_fd(sgsn->ares_channel, - (what & BSC_FD_READ) ? fd->fd : ARES_SOCKET_BAD, - (what & BSC_FD_WRITE) ? fd->fd : ARES_SOCKET_BAD); - osmo_ares_reschedule(sgsn); - return 0; -} - -static void ares_timeout_cb(void *data) -{ - struct sgsn_instance *sgsn = data; - - LOGP(DGPRS, LOGL_DEBUG, "C-ares triggering timeout\n"); - ares_process_fd(sgsn->ares_channel, ARES_SOCKET_BAD, ARES_SOCKET_BAD); - osmo_ares_reschedule(sgsn); -} - -static void osmo_ares_reschedule(struct sgsn_instance *sgsn) -{ - struct timeval *timeout, tv; - - osmo_timer_del(&sgsn->ares_timer); - timeout = ares_timeout(sgsn->ares_channel, NULL, &tv); - if (timeout) { - LOGP(DGPRS, LOGL_DEBUG, "C-ares scheduling timeout %llu.%llu\n", - (unsigned long long) tv.tv_sec, - (unsigned long long) tv.tv_usec); - osmo_timer_setup(&sgsn->ares_timer, ares_timeout_cb, sgsn); - osmo_timer_schedule(&sgsn->ares_timer, tv.tv_sec, tv.tv_usec); - } -} - -static void setup_ares_osmo_fd(void *data, int fd, int read, int write) -{ - struct cares_event_fd *ufd, *tmp; - - /* delete the entry */ - if (read == 0 && write == 0) { - llist_for_each_entry_safe(ufd, tmp, &sgsn->ares_fds, head) { - if (ufd->fd.fd != fd) - continue; - - LOGP(DGPRS, LOGL_DEBUG, - "Removing C-ares watched fd (%d)\n", fd); - osmo_fd_unregister(&ufd->fd); - llist_del(&ufd->head); - talloc_free(ufd); - return; - } - } - - /* Search for the fd or create a new one */ - llist_for_each_entry(ufd, &sgsn->ares_fds, head) { - if (ufd->fd.fd != fd) - continue; - - LOGP(DGPRS, LOGL_DEBUG, "Updating C-ares fd (%d)\n", fd); - goto update_fd; - } - - LOGP(DGPRS, LOGL_DEBUG, "Registering C-ares fd (%d)\n", fd); - ufd = talloc_zero(tall_bsc_ctx, struct cares_event_fd); - ufd->fd.fd = fd; - ufd->fd.cb = ares_osmo_fd_cb; - ufd->fd.data = data; - if (osmo_fd_register(&ufd->fd) != 0) - LOGP(DGPRS, LOGL_ERROR, "Failed to register C-ares fd (%d)\n", fd); - llist_add(&ufd->head, &sgsn->ares_fds); - -update_fd: - if (read) - ufd->fd.when |= BSC_FD_READ; - else - ufd->fd.when &= ~BSC_FD_READ; - - if (write) - ufd->fd.when |= BSC_FD_WRITE; - else - ufd->fd.when &= ~BSC_FD_WRITE; - - osmo_ares_reschedule(sgsn); -} - -int sgsn_ares_query(struct sgsn_instance *sgsn, const char *name, - ares_host_callback cb, void *data) -{ - struct cares_cb_data *cb_data; - - cb_data = talloc_zero(tall_bsc_ctx, struct cares_cb_data); - cb_data->cb = cb; - cb_data->data = data; - ares_gethostbyname(sgsn->ares_channel, name, AF_INET, ares_cb, cb_data); - osmo_ares_reschedule(sgsn); - return 0; -} - -int sgsn_ares_init(struct sgsn_instance *sgsn) -{ - struct ares_options options; - int optmask; - int rc; - - INIT_LLIST_HEAD(&sgsn->ares_fds); - memset(&options, 0, sizeof(options)); - options.sock_state_cb = setup_ares_osmo_fd; - options.sock_state_cb_data = sgsn; - - optmask = ARES_OPT_FLAGS | ARES_OPT_SOCK_STATE_CB | ARES_OPT_DOMAINS; - - if (sgsn->ares_servers) - optmask |= ARES_OPT_SERVERS; - - ares_library_init(ARES_LIB_INIT_ALL); - rc = ares_init_options(&sgsn->ares_channel, &options, optmask); - if (rc != ARES_SUCCESS) - return rc; - - if (sgsn->ares_servers) - rc = ares_set_servers(sgsn->ares_channel, sgsn->ares_servers); - - return rc; -} - -osmo_static_assert(ARES_SUCCESS == 0, ares_success_zero); diff --git a/openbsc/src/gprs/sgsn_auth.c b/openbsc/src/gprs/sgsn_auth.c deleted file mode 100644 index a64339c3e..000000000 --- a/openbsc/src/gprs/sgsn_auth.c +++ /dev/null @@ -1,312 +0,0 @@ -/* MS authorization and subscriber data handling */ - -/* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org> - * - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <osmocom/gsm/protocol/gsm_04_08_gprs.h> -#include <osmocom/core/utils.h> -#include <openbsc/sgsn.h> -#include <openbsc/gprs_sgsn.h> -#include <openbsc/gprs_gmm.h> -#include <openbsc/gprs_subscriber.h> -#include <openbsc/debug.h> - -const struct value_string auth_state_names[] = { - { SGSN_AUTH_ACCEPTED, "accepted"}, - { SGSN_AUTH_REJECTED, "rejected"}, - { SGSN_AUTH_UNKNOWN, "unknown"}, - { SGSN_AUTH_AUTHENTICATE, "authenticate" }, - { SGSN_AUTH_UMTS_RESYNC, "UMTS-resync" }, - { 0, NULL } -}; - -const struct value_string *sgsn_auth_state_names = auth_state_names; - -void sgsn_auth_init(void) -{ - INIT_LLIST_HEAD(&sgsn->cfg.imsi_acl); -} - -/* temporary IMSI ACL hack */ -struct imsi_acl_entry *sgsn_acl_lookup(const char *imsi, struct sgsn_config *cfg) -{ - struct imsi_acl_entry *acl; - llist_for_each_entry(acl, &cfg->imsi_acl, list) { - if (!strcmp(imsi, acl->imsi)) - return acl; - } - return NULL; -} - -int sgsn_acl_add(const char *imsi, struct sgsn_config *cfg) -{ - struct imsi_acl_entry *acl; - - if (sgsn_acl_lookup(imsi, cfg)) - return -EEXIST; - - acl = talloc_zero(NULL, struct imsi_acl_entry); - if (!acl) - return -ENOMEM; - osmo_strlcpy(acl->imsi, imsi, sizeof(acl->imsi)); - - llist_add(&acl->list, &cfg->imsi_acl); - - return 0; -} - -int sgsn_acl_del(const char *imsi, struct sgsn_config *cfg) -{ - struct imsi_acl_entry *acl; - - acl = sgsn_acl_lookup(imsi, cfg); - if (!acl) - return -ENODEV; - - llist_del(&acl->list); - talloc_free(acl); - - return 0; -} - -enum sgsn_auth_state sgsn_auth_state(struct sgsn_mm_ctx *mmctx) -{ - char mccmnc[16]; - int check_net = 0; - int check_acl = 0; - - OSMO_ASSERT(mmctx); - - switch (sgsn->cfg.auth_policy) { - case SGSN_AUTH_POLICY_OPEN: - return SGSN_AUTH_ACCEPTED; - - case SGSN_AUTH_POLICY_CLOSED: - check_net = 1; - check_acl = 1; - break; - - case SGSN_AUTH_POLICY_ACL_ONLY: - check_acl = 1; - break; - - case SGSN_AUTH_POLICY_REMOTE: - if (!mmctx->subscr) - return mmctx->auth_state; - - if (mmctx->subscr->flags & GPRS_SUBSCRIBER_UPDATE_PENDING_MASK) - return mmctx->auth_state; - - if (sgsn->cfg.require_authentication && - (!mmctx->is_authenticated || - mmctx->subscr->sgsn_data->auth_triplets_updated)) - return SGSN_AUTH_AUTHENTICATE; - - if (mmctx->subscr->authorized) - return SGSN_AUTH_ACCEPTED; - - return SGSN_AUTH_REJECTED; - } - - if (!strlen(mmctx->imsi)) { - LOGMMCTXP(LOGL_NOTICE, mmctx, - "Missing IMSI, authorization state not known\n"); - return SGSN_AUTH_UNKNOWN; - } - - if (check_net) { - /* We simply assume that the IMSI exists, as long as it is part - * of 'our' network */ - snprintf(mccmnc, sizeof(mccmnc), "%03d%02d", - mmctx->ra.mcc, mmctx->ra.mnc); - if (strncmp(mccmnc, mmctx->imsi, 5) == 0) - return SGSN_AUTH_ACCEPTED; - } - - if (check_acl && sgsn_acl_lookup(mmctx->imsi, &sgsn->cfg)) - return SGSN_AUTH_ACCEPTED; - - return SGSN_AUTH_REJECTED; -} - -/* - * This function is directly called by e.g. the GMM layer. It returns either - * after calling sgsn_auth_update directly or after triggering an asynchronous - * procedure which will call sgsn_auth_update later on. - */ -int sgsn_auth_request(struct sgsn_mm_ctx *mmctx) -{ - struct gprs_subscr *subscr; - struct gsm_auth_tuple *at; - int need_update_location; - int rc; - - LOGMMCTXP(LOGL_DEBUG, mmctx, "Requesting authorization\n"); - - if (sgsn->cfg.auth_policy != SGSN_AUTH_POLICY_REMOTE) { - sgsn_auth_update(mmctx); - return 0; - } - - need_update_location = sgsn->cfg.require_update_location && - (mmctx->subscr == NULL || - mmctx->pending_req == GSM48_MT_GMM_ATTACH_REQ); - - /* This has the side effect of registering the subscr with the mmctx */ - subscr = gprs_subscr_get_or_create_by_mmctx(mmctx); - gprs_subscr_put(subscr); - - OSMO_ASSERT(mmctx->subscr != NULL); - - if (sgsn->cfg.require_authentication && !mmctx->is_authenticated) { - /* Find next tuple */ - at = sgsn_auth_get_tuple(mmctx, mmctx->auth_triplet.key_seq); - - if (!at) { - /* No valid tuple found, request fresh ones */ - mmctx->auth_triplet.key_seq = GSM_KEY_SEQ_INVAL; - LOGMMCTXP(LOGL_INFO, mmctx, - "Requesting authentication tuples\n"); - rc = gprs_subscr_request_auth_info(mmctx, NULL, NULL); - if (rc >= 0) - return 0; - - return rc; - } - - mmctx->auth_triplet = *at; - } else if (need_update_location) { - LOGMMCTXP(LOGL_INFO, mmctx, - "Missing information, requesting subscriber data\n"); - rc = gprs_subscr_request_update_location(mmctx); - if (rc >= 0) - return 0; - - return rc; - } - - sgsn_auth_update(mmctx); - return 0; -} - -void sgsn_auth_update(struct sgsn_mm_ctx *mmctx) -{ - enum sgsn_auth_state auth_state; - struct gprs_subscr *subscr = mmctx->subscr; - struct gsm_auth_tuple *at; - int gmm_cause; - - auth_state = sgsn_auth_state(mmctx); - - LOGMMCTXP(LOGL_DEBUG, mmctx, "Updating authorization (%s -> %s)\n", - get_value_string(sgsn_auth_state_names, mmctx->auth_state), - get_value_string(sgsn_auth_state_names, auth_state)); - - if (auth_state == SGSN_AUTH_UNKNOWN && subscr && - !(subscr->flags & GPRS_SUBSCRIBER_UPDATE_PENDING_MASK)) { - /* Reject requests if gprs_subscr_request_update_location fails */ - LOGMMCTXP(LOGL_ERROR, mmctx, - "Missing information, authorization not possible\n"); - auth_state = SGSN_AUTH_REJECTED; - } - - if (auth_state == SGSN_AUTH_AUTHENTICATE && - mmctx->auth_triplet.key_seq == GSM_KEY_SEQ_INVAL) { - /* The current tuple is not valid, but we are possibly called - * because new auth tuples have been received */ - at = sgsn_auth_get_tuple(mmctx, mmctx->auth_triplet.key_seq); - if (!at) { - LOGMMCTXP(LOGL_ERROR, mmctx, - "Missing auth tuples, authorization not possible\n"); - auth_state = SGSN_AUTH_REJECTED; - } else { - mmctx->auth_triplet = *at; - } - } - - if (mmctx->auth_state == auth_state) - return; - - LOGMMCTXP(LOGL_INFO, mmctx, "Got authorization update: state %s -> %s\n", - get_value_string(sgsn_auth_state_names, mmctx->auth_state), - get_value_string(sgsn_auth_state_names, auth_state)); - - mmctx->auth_state = auth_state; - - switch (auth_state) { - case SGSN_AUTH_AUTHENTICATE: - if (subscr) - subscr->sgsn_data->auth_triplets_updated = 0; - - gsm0408_gprs_authenticate(mmctx); - break; - case SGSN_AUTH_ACCEPTED: - gsm0408_gprs_access_granted(mmctx); - break; - case SGSN_AUTH_REJECTED: - gmm_cause = - subscr ? subscr->sgsn_data->error_cause : - SGSN_ERROR_CAUSE_NONE; - - if (subscr && (subscr->flags & GPRS_SUBSCRIBER_CANCELLED) != 0) - gsm0408_gprs_access_cancelled(mmctx, gmm_cause); - else - gsm0408_gprs_access_denied(mmctx, gmm_cause); - break; - default: - break; - } -} - -struct gsm_auth_tuple *sgsn_auth_get_tuple(struct sgsn_mm_ctx *mmctx, - unsigned key_seq) -{ - unsigned count; - unsigned idx; - struct gsm_auth_tuple *at = NULL; - - struct sgsn_subscriber_data *sdata; - - if (!mmctx->subscr) - return NULL; - - if (key_seq == GSM_KEY_SEQ_INVAL) - /* Start with 0 after increment module array size */ - idx = ARRAY_SIZE(sdata->auth_triplets) - 1; - else - idx = key_seq; - - sdata = mmctx->subscr->sgsn_data; - - /* Find next tuple */ - for (count = ARRAY_SIZE(sdata->auth_triplets); count > 0; count--) { - idx = (idx + 1) % ARRAY_SIZE(sdata->auth_triplets); - - if (sdata->auth_triplets[idx].key_seq == GSM_KEY_SEQ_INVAL) - continue; - - if (sdata->auth_triplets[idx].use_count == 0) { - at = &sdata->auth_triplets[idx]; - at->use_count = 1; - return at; - } - } - - return NULL; -} diff --git a/openbsc/src/gprs/sgsn_cdr.c b/openbsc/src/gprs/sgsn_cdr.c deleted file mode 100644 index 16ea9d47a..000000000 --- a/openbsc/src/gprs/sgsn_cdr.c +++ /dev/null @@ -1,259 +0,0 @@ -/* GPRS SGSN CDR dumper */ - -/* (C) 2015 by Holger Hans Peter Freyther - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <openbsc/sgsn.h> -#include <openbsc/signal.h> -#include <openbsc/gprs_utils.h> -#include <openbsc/debug.h> -#include <osmocom/gsm/apn.h> - -#include <openbsc/vty.h> - -#include <gtp.h> -#include <pdp.h> - -#include <arpa/inet.h> - -#include <time.h> - -#include <stdio.h> -#include <inttypes.h> - -/* TODO...avoid going through a global */ -extern struct sgsn_instance *sgsn; - -/** - * The CDR module will generate an entry like: - * - * IMSI, # Subscriber IMSI - * IMEI, # Subscriber IMEI - * MSISDN, # Subscriber MISDN - * Charging_Timestamp, # Event start Time - * Charging_UTC, # Time zone of event start time - * Duration, # Session DURATION - * Cell_Id, # CELL_ID - * Location_Area, # LAC - * GGSN_ADDR, # GGSN_ADDR - * SGSN_ADDR, # SGSN_ADDR - * APNI, # APNI - * PDP_ADDR, # PDP_ADDR - * VOL_IN, # VOL_IN in Bytes - * VOL_OUT, # VOL_OUT in Bytes - * CAUSE_FOR_TERM, # CAUSE_FOR_TERM - */ - - -static void maybe_print_header(FILE *cdr_file) -{ - if (ftell(cdr_file) != 0) - return; - - fprintf(cdr_file, "timestamp,imsi,imei,msisdn,cell_id,lac,hlr,event,pdp_duration,ggsn_addr,sgsn_addr,apni,eua_addr,vol_in,vol_out,charging_id\n"); -} - -static void cdr_log_mm(struct sgsn_instance *inst, const char *ev, - struct sgsn_mm_ctx *mmctx) -{ - FILE *cdr_file; - struct tm tm; - struct timeval tv; - - if (!inst->cfg.cdr.filename) - return; - - cdr_file = fopen(inst->cfg.cdr.filename, "a"); - if (!cdr_file) { - LOGP(DGPRS, LOGL_ERROR, "Failed to open %s\n", - inst->cfg.cdr.filename); - return; - } - - maybe_print_header(cdr_file); - gettimeofday(&tv, NULL); - gmtime_r(&tv.tv_sec, &tm); - fprintf(cdr_file, "%04d%02d%02d%02d%02d%02d%03d,%s,%s,%s,%d,%d,%s,%s\n", - tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, - tm.tm_hour, tm.tm_min, tm.tm_sec, - (int)(tv.tv_usec / 1000), - mmctx->imsi, - mmctx->imei, - mmctx->msisdn, - mmctx->gb.cell_id, - mmctx->ra.lac, - mmctx->hlr, - ev); - - fclose(cdr_file); -} - -static void extract_eua(struct ul66_t *eua, char *eua_addr) -{ - if (eua->l < 2) - return; - - /* there is no addr for ETSI/PPP */ - if ((eua->v[0] & 0x0F) != 1) { - strcpy(eua_addr, "ETSI"); - return; - } - - if (eua->v[1] == 0x21 && eua->l == 6) - inet_ntop(AF_INET, &eua->v[2], eua_addr, INET_ADDRSTRLEN); - else if (eua->v[1] == 0x57 && eua->l == 18) - inet_ntop(AF_INET6, &eua->v[2], eua_addr, INET6_ADDRSTRLEN); - else { - /* e.g. both IPv4 and IPv6 */ - strcpy(eua_addr, "Unknown address"); - } -} - -static void cdr_log_pdp(struct sgsn_instance *inst, const char *ev, - struct sgsn_pdp_ctx *pdp) -{ - FILE *cdr_file; - char apni[(pdp->lib ? pdp->lib->apn_use.l : 0) + 1]; - char ggsn_addr[INET_ADDRSTRLEN + 1]; - char sgsn_addr[INET_ADDRSTRLEN + 1]; - char eua_addr[INET6_ADDRSTRLEN + 1]; - struct tm tm; - struct timeval tv; - time_t duration; - struct timespec tp; - - if (!inst->cfg.cdr.filename) - return; - - memset(apni, 0, sizeof(apni)); - memset(ggsn_addr, 0, sizeof(ggsn_addr)); - memset(eua_addr, 0, sizeof(eua_addr)); - - - if (pdp->lib) { - osmo_apn_to_str(apni, pdp->lib->apn_use.v, pdp->lib->apn_use.l); - inet_ntop(AF_INET, &pdp->lib->hisaddr0.s_addr, ggsn_addr, sizeof(ggsn_addr)); - extract_eua(&pdp->lib->eua, eua_addr); - } - - if (pdp->ggsn) - inet_ntop(AF_INET, &pdp->ggsn->gsn->gsnc.s_addr, sgsn_addr, sizeof(sgsn_addr)); - - cdr_file = fopen(inst->cfg.cdr.filename, "a"); - if (!cdr_file) { - LOGP(DGPRS, LOGL_ERROR, "Failed to open %s\n", - inst->cfg.cdr.filename); - return; - } - - maybe_print_header(cdr_file); - - clock_gettime(CLOCK_MONOTONIC, &tp); - gettimeofday(&tv, NULL); - - /* convert the timestamp to UTC */ - gmtime_r(&tv.tv_sec, &tm); - - /* Check the duration of the PDP context */ - duration = tp.tv_sec - pdp->cdr_start.tv_sec; - - fprintf(cdr_file, - "%04d%02d%02d%02d%02d%02d%03d,%s,%s,%s,%d,%d,%s,%s,%ld,%s,%s,%s,%s,%" PRIu64 ",%" PRIu64 ",%u\n", - tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, - tm.tm_hour, tm.tm_min, tm.tm_sec, - (int)(tv.tv_usec / 1000), - pdp->mm ? pdp->mm->imsi : "N/A", - pdp->mm ? pdp->mm->imei : "N/A", - pdp->mm ? pdp->mm->msisdn : "N/A", - pdp->mm ? pdp->mm->gb.cell_id : -1, - pdp->mm ? pdp->mm->ra.lac : -1, - pdp->mm ? pdp->mm->hlr : "N/A", - ev, - (unsigned long ) duration, - ggsn_addr, - sgsn_addr, - apni, - eua_addr, - pdp->cdr_bytes_in, - pdp->cdr_bytes_out, - pdp->cdr_charging_id); - fclose(cdr_file); -} - -static void cdr_pdp_timeout(void *_data) -{ - struct sgsn_pdp_ctx *pdp = _data; - cdr_log_pdp(sgsn, "pdp-periodic", pdp); - osmo_timer_schedule(&pdp->cdr_timer, sgsn->cfg.cdr.interval, 0); -} - -static int handle_sgsn_sig(unsigned int subsys, unsigned int signal, - void *handler_data, void *_signal_data) -{ - struct sgsn_signal_data *signal_data = _signal_data; - struct sgsn_instance *inst = handler_data; - - if (subsys != SS_SGSN) - return 0; - - switch (signal) { - case S_SGSN_ATTACH: - cdr_log_mm(inst, "attach", signal_data->mm); - break; - case S_SGSN_UPDATE: - cdr_log_mm(inst, "update", signal_data->mm); - break; - case S_SGSN_DETACH: - cdr_log_mm(inst, "detach", signal_data->mm); - break; - case S_SGSN_MM_FREE: - cdr_log_mm(inst, "free", signal_data->mm); - break; - case S_SGSN_PDP_ACT: - clock_gettime(CLOCK_MONOTONIC, &signal_data->pdp->cdr_start); - signal_data->pdp->cdr_charging_id = signal_data->pdp->lib->cid; - cdr_log_pdp(inst, "pdp-act", signal_data->pdp); - osmo_timer_setup(&signal_data->pdp->cdr_timer, cdr_pdp_timeout, - signal_data->pdp); - osmo_timer_schedule(&signal_data->pdp->cdr_timer, inst->cfg.cdr.interval, 0); - break; - case S_SGSN_PDP_DEACT: - cdr_log_pdp(inst, "pdp-deact", signal_data->pdp); - osmo_timer_del(&signal_data->pdp->cdr_timer); - break; - case S_SGSN_PDP_TERMINATE: - cdr_log_pdp(inst, "pdp-terminate", signal_data->pdp); - osmo_timer_del(&signal_data->pdp->cdr_timer); - break; - case S_SGSN_PDP_FREE: - cdr_log_pdp(inst, "pdp-free", signal_data->pdp); - osmo_timer_del(&signal_data->pdp->cdr_timer); - break; - } - - return 0; -} - -int sgsn_cdr_init(struct sgsn_instance *sgsn) -{ - /* register for CDR related events */ - sgsn->cfg.cdr.interval = 10 * 60; - osmo_signal_register_handler(SS_SGSN, handle_sgsn_sig, sgsn); - - return 0; -} diff --git a/openbsc/src/gprs/sgsn_ctrl.c b/openbsc/src/gprs/sgsn_ctrl.c deleted file mode 100644 index 31ac74f1f..000000000 --- a/openbsc/src/gprs/sgsn_ctrl.c +++ /dev/null @@ -1,69 +0,0 @@ -/* Control Interface Implementation for the SGSN */ -/* - * (C) 2014 by Holger Hans Peter Freyther - * (C) 2014 by sysmocom s.f.m.c. GmbH - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <osmocom/ctrl/control_if.h> -#include <osmocom/ctrl/control_cmd.h> -#include <openbsc/gsm_data.h> -#include <openbsc/gprs_sgsn.h> -#include <openbsc/sgsn.h> -#include <openbsc/debug.h> - -#include <pdp.h> - -extern vector ctrl_node_vec; - -static int get_subscriber_list(struct ctrl_cmd *cmd, void *d) -{ - struct sgsn_mm_ctx *mm; - - cmd->reply = talloc_strdup(cmd, ""); - llist_for_each_entry(mm, &sgsn_mm_ctxts, list) { - char *addr = NULL; - struct sgsn_pdp_ctx *pdp; - - if (strlen(mm->imsi) == 0) - continue; - - llist_for_each_entry(pdp, &mm->pdp_list, list) - addr = gprs_pdpaddr2str(pdp->lib->eua.v, - pdp->lib->eua.l); - - cmd->reply = talloc_asprintf_append( - cmd->reply, - "%s,%s\n", mm->imsi, addr ? addr : ""); - } - - return CTRL_CMD_REPLY; -} -CTRL_CMD_DEFINE_RO(subscriber_list, "subscriber-list-active-v1"); - -int sgsn_ctrl_cmds_install(void) -{ - int rc = 0; - rc |= ctrl_cmd_install(CTRL_NODE_ROOT, &cmd_subscriber_list); - return rc; -} - -struct ctrl_handle *sgsn_controlif_setup(struct gsm_network *net, - const char *bind_addr, uint16_t port) -{ - return ctrl_interface_setup_dynip(net, bind_addr, port, NULL); -} diff --git a/openbsc/src/gprs/sgsn_libgtp.c b/openbsc/src/gprs/sgsn_libgtp.c deleted file mode 100644 index e90b66dcf..000000000 --- a/openbsc/src/gprs/sgsn_libgtp.c +++ /dev/null @@ -1,874 +0,0 @@ -/* GPRS SGSN integration with libgtp of OpenGGSN */ -/* libgtp implements the GPRS Tunelling Protocol GTP per TS 09.60 / 29.060 */ - -/* (C) 2010 by Harald Welte <laforge@gnumonks.org> - * (C) 2010 by On-Waves - * (C) 2015 by Holger Hans Peter Freyther - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <unistd.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <getopt.h> -#include <errno.h> -#include <signal.h> -#include <sys/fcntl.h> -#include <sys/stat.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <arpa/inet.h> - -#include "bscconfig.h" - -#include <osmocom/core/talloc.h> -#include <osmocom/core/select.h> -#include <osmocom/core/rate_ctr.h> -#include <osmocom/gprs/gprs_bssgp.h> -#include <osmocom/gsm/protocol/gsm_04_08_gprs.h> - -#include <openbsc/signal.h> -#include <openbsc/debug.h> -#include <openbsc/sgsn.h> -#include <openbsc/gprs_llc.h> -#include <openbsc/gprs_sgsn.h> -#include <openbsc/gprs_gmm.h> -#include <openbsc/gprs_subscriber.h> -#include <openbsc/gprs_sndcp.h> - -#ifdef BUILD_IU -#include <openbsc/iu.h> -#include <osmocom/ranap/ranap_ies_defs.h> -#endif - -#include <gtp.h> -#include <pdp.h> - -/* TS 23.003: The MSISDN shall take the dummy MSISDN value composed of - * 15 digits set to 0 (encoded as an E.164 international number) when - * the MSISDN is not available in messages in which the presence of the - * MSISDN parameter */ -static const uint8_t dummy_msisdn[] = - { 0x91, /* No extension, international, E.164 */ - 0, 0, 0, 0, 0, 0, 0, /* 14 digits of zeroes */ - 0xF0 /* 15th digit of zero + padding */ }; - -const struct value_string gtp_cause_strs[] = { - { GTPCAUSE_REQ_IMSI, "Request IMSI" }, - { GTPCAUSE_REQ_IMEI, "Request IMEI" }, - { GTPCAUSE_REQ_IMSI_IMEI, "Request IMSI and IMEI" }, - { GTPCAUSE_NO_ID_NEEDED, "No identity needed" }, - { GTPCAUSE_MS_REFUSES_X, "MS refuses" }, - { GTPCAUSE_MS_NOT_RESP_X, "MS is not GPRS responding" }, - { GTPCAUSE_ACC_REQ, "Request accepted" }, - { GTPCAUSE_NON_EXIST, "Non-existent" }, - { GTPCAUSE_INVALID_MESSAGE, "Invalid message format" }, - { GTPCAUSE_IMSI_NOT_KNOWN, "IMSI not known" }, - { GTPCAUSE_MS_DETACHED, "MS is GPRS detached" }, - { GTPCAUSE_MS_NOT_RESP, "MS is not GPRS responding" }, - { GTPCAUSE_MS_REFUSES, "MS refuses" }, - { GTPCAUSE_NO_RESOURCES, "No resources available" }, - { GTPCAUSE_NOT_SUPPORTED, "Service not supported" }, - { GTPCAUSE_MAN_IE_INCORRECT, "Mandatory IE incorrect" }, - { GTPCAUSE_MAN_IE_MISSING, "Mandatory IE missing" }, - { GTPCAUSE_OPT_IE_INCORRECT, "Optional IE incorrect" }, - { GTPCAUSE_SYS_FAIL, "System failure" }, - { GTPCAUSE_ROAMING_REST, "Roaming restrictions" }, - { GTPCAUSE_PTIMSI_MISMATCH, "P-TMSI Signature mismatch" }, - { GTPCAUSE_CONN_SUSP, "GPRS connection suspended" }, - { GTPCAUSE_AUTH_FAIL, "Authentication failure" }, - { GTPCAUSE_USER_AUTH_FAIL, "User authentication failed" }, - { GTPCAUSE_CONTEXT_NOT_FOUND, "Context not found" }, - { GTPCAUSE_ADDR_OCCUPIED, "All dynamic PDP addresses occupied" }, - { GTPCAUSE_NO_MEMORY, "No memory is available" }, - { GTPCAUSE_RELOC_FAIL, "Relocation failure" }, - { GTPCAUSE_UNKNOWN_MAN_EXTHEADER, "Unknown mandatory ext. header" }, - { GTPCAUSE_SEM_ERR_TFT, "Semantic error in TFT operation" }, - { GTPCAUSE_SYN_ERR_TFT, "Syntactic error in TFT operation" }, - { GTPCAUSE_SEM_ERR_FILTER, "Semantic errors in packet filter" }, - { GTPCAUSE_SYN_ERR_FILTER, "Syntactic errors in packet filter" }, - { GTPCAUSE_MISSING_APN, "Missing or unknown APN" }, - { GTPCAUSE_UNKNOWN_PDP, "Unknown PDP address or PDP type" }, - { 0, NULL } -}; - -/* Generate the GTP IMSI IE according to 09.60 Section 7.9.2 */ -static uint64_t imsi_str2gtp(char *str) -{ - uint64_t imsi64 = 0; - unsigned int n; - unsigned int imsi_len = strlen(str); - - if (imsi_len > 16) { - LOGP(DGPRS, LOGL_NOTICE, "IMSI length > 16 not supported!\n"); - return 0; - } - - for (n = 0; n < 16; n++) { - uint64_t val; - if (n < imsi_len) - val = (str[n]-'0') & 0xf; - else - val = 0xf; - imsi64 |= (val << (n*4)); - } - return imsi64; -} - -/* generate a PDP context based on the IE's from the 04.08 message, - * and send the GTP create pdp context request to the GGSN */ -struct sgsn_pdp_ctx *sgsn_create_pdp_ctx(struct sgsn_ggsn_ctx *ggsn, - struct sgsn_mm_ctx *mmctx, - uint16_t nsapi, - struct tlv_parsed *tp) -{ - struct gprs_ra_id raid; - struct sgsn_pdp_ctx *pctx; - struct pdp_t *pdp; - uint64_t imsi_ui64; - size_t qos_len; - const uint8_t *qos; - int rc; - - LOGP(DGPRS, LOGL_ERROR, "Create PDP Context\n"); - pctx = sgsn_pdp_ctx_alloc(mmctx, nsapi); - if (!pctx) { - LOGP(DGPRS, LOGL_ERROR, "Couldn't allocate PDP Ctx\n"); - return NULL; - } - - imsi_ui64 = imsi_str2gtp(mmctx->imsi); - - rc = pdp_newpdp(&pdp, imsi_ui64, nsapi, NULL); - if (rc) { - LOGP(DGPRS, LOGL_ERROR, "Out of libgtp PDP Contexts\n"); - return NULL; - } - pdp->priv = pctx; - pctx->lib = pdp; - pctx->ggsn = ggsn; - - //pdp->peer = /* sockaddr_in of GGSN (receive) */ - //pdp->ipif = /* not used by library */ - pdp->version = ggsn->gtp_version; - pdp->hisaddr0 = ggsn->remote_addr; - pdp->hisaddr1 = ggsn->remote_addr; - //pdp->cch_pdp = 512; /* Charging Flat Rate */ - - /* MS provided APN, subscription was verified by the caller */ - pdp->selmode = 0xFC | 0x00; - - /* IMSI, TEID/TEIC, FLLU/FLLC, TID, NSAPI set in pdp_newpdp */ - - /* Put the MSISDN in case we have it */ - if (mmctx->subscr && mmctx->subscr->sgsn_data->msisdn_len) { - pdp->msisdn.l = mmctx->subscr->sgsn_data->msisdn_len; - if (pdp->msisdn.l > sizeof(pdp->msisdn.v)) - pdp->msisdn.l = sizeof(pdp->msisdn.v); - memcpy(pdp->msisdn.v, mmctx->subscr->sgsn_data->msisdn, - pdp->msisdn.l); - } else { - /* use the dummy 15-digits-zero MSISDN value */ - pdp->msisdn.l = sizeof(dummy_msisdn); - memcpy(pdp->msisdn.v, dummy_msisdn, pdp->msisdn.l); - } - - /* End User Address from GMM requested PDP address */ - pdp->eua.l = TLVP_LEN(tp, OSMO_IE_GSM_REQ_PDP_ADDR); - if (pdp->eua.l > sizeof(pdp->eua.v)) - pdp->eua.l = sizeof(pdp->eua.v); - memcpy(pdp->eua.v, TLVP_VAL(tp, OSMO_IE_GSM_REQ_PDP_ADDR), - pdp->eua.l); - /* Highest 4 bits of first byte need to be set to 1, otherwise - * the IE is identical with the 04.08 PDP Address IE */ - pdp->eua.v[0] |= 0xf0; - - /* APN name from GMM */ - pdp->apn_use.l = TLVP_LEN(tp, GSM48_IE_GSM_APN); - if (pdp->apn_use.l > sizeof(pdp->apn_use.v)) - pdp->apn_use.l = sizeof(pdp->apn_use.v); - memcpy(pdp->apn_use.v, TLVP_VAL(tp, GSM48_IE_GSM_APN), - pdp->apn_use.l); - - /* Protocol Configuration Options from GMM */ - pdp->pco_req.l = TLVP_LEN(tp, GSM48_IE_GSM_PROTO_CONF_OPT); - if (pdp->pco_req.l > sizeof(pdp->pco_req.v)) - pdp->pco_req.l = sizeof(pdp->pco_req.v); - memcpy(pdp->pco_req.v, TLVP_VAL(tp, GSM48_IE_GSM_PROTO_CONF_OPT), - pdp->pco_req.l); - - /* QoS options from GMM or remote */ - if (TLVP_LEN(tp, OSMO_IE_GSM_SUB_QOS) > 0) { - qos_len = TLVP_LEN(tp, OSMO_IE_GSM_SUB_QOS); - qos = TLVP_VAL(tp, OSMO_IE_GSM_SUB_QOS); - } else { - qos_len = TLVP_LEN(tp, OSMO_IE_GSM_REQ_QOS); - qos = TLVP_VAL(tp, OSMO_IE_GSM_REQ_QOS); - } - - if (qos_len <= 3) { - pdp->qos_req.l = qos_len + 1; - if (pdp->qos_req.l > sizeof(pdp->qos_req.v)) - pdp->qos_req.l = sizeof(pdp->qos_req.v); - pdp->qos_req.v[0] = 0; /* Allocation/Retention policy */ - memcpy(&pdp->qos_req.v[1], qos, pdp->qos_req.l - 1); - } else { - pdp->qos_req.l = qos_len; - if (pdp->qos_req.l > sizeof(pdp->qos_req.v)) - pdp->qos_req.l = sizeof(pdp->qos_req.v); - memcpy(pdp->qos_req.v, qos, pdp->qos_req.l); - } - - /* charging characteristics if present */ - if (TLVP_LEN(tp, OSMO_IE_GSM_CHARG_CHAR) >= sizeof(pdp->cch_pdp)) - pdp->cch_pdp = tlvp_val16be(tp, OSMO_IE_GSM_CHARG_CHAR); - - /* SGSN address for control plane */ - pdp->gsnlc.l = sizeof(sgsn->cfg.gtp_listenaddr.sin_addr); - memcpy(pdp->gsnlc.v, &sgsn->cfg.gtp_listenaddr.sin_addr, - sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); - - /* SGSN address for user plane - * Default to the control plane addr for now. If we are connected to a - * hnbgw via IuPS we'll need to send a PDP context update with the - * correct IP address after the RAB Assignment is complete */ - pdp->gsnlu.l = sizeof(sgsn->cfg.gtp_listenaddr.sin_addr); - memcpy(pdp->gsnlu.v, &sgsn->cfg.gtp_listenaddr.sin_addr, - sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); - - /* Encode RAT Type according to TS 29.060 7.7.50 */ - pdp->rattype.l = 1; - if (mmctx->ran_type == MM_CTX_T_UTRAN_Iu) - pdp->rattype.v[0] = 1; - else - pdp->rattype.v[0] = 2; - pdp->rattype_given = 1; - - /* Include RAI and ULI all the time */ - pdp->rai_given = 1; - pdp->rai.l = 6; - raid = mmctx->ra; - raid.lac = 0xFFFE; - raid.rac = 0xFF; - gsm48_construct_ra(pdp->rai.v, &raid); - - /* Encode User Location Information accordint to TS 29.060 7.7.51 */ - pdp->userloc_given = 1; - pdp->userloc.l = 8; - if (mmctx->ran_type == MM_CTX_T_UTRAN_Iu) { - pdp->userloc.v[0] = 1; /* SAI for UTRAN */ - /* SAI is like CGI but with SAC instead of CID, so we can abuse this function */ - bssgp_create_cell_id(&pdp->userloc.v[1], &mmctx->ra, mmctx->iu.sac); - } else { - pdp->userloc.v[0] = 0; /* CGI for GERAN */ - bssgp_create_cell_id(&pdp->userloc.v[1], &mmctx->ra, mmctx->gb.cell_id); - } - - /* include the IMEI(SV) */ - pdp->imeisv_given = 1; - gsm48_encode_bcd_number(&pdp->imeisv.v[0], 8, 0, mmctx->imei); - pdp->imeisv.l = pdp->imeisv.v[0]; - memmove(&pdp->imeisv.v[0], &pdp->imeisv.v[1], 8); - - /* change pdp state to 'requested' */ - pctx->state = PDP_STATE_CR_REQ; - - rc = gtp_create_context_req(ggsn->gsn, pdp, pctx); - /* FIXME */ - - return pctx; -} - -/* SGSN wants to delete a PDP context */ -int sgsn_delete_pdp_ctx(struct sgsn_pdp_ctx *pctx) -{ - LOGPDPCTXP(LOGL_ERROR, pctx, "Delete PDP Context\n"); - - /* FIXME: decide if we need teardown or not ! */ - return gtp_delete_context_req(pctx->ggsn->gsn, pctx->lib, pctx, 1); -} - -struct cause_map { - uint8_t cause_in; - uint8_t cause_out; -}; - -static uint8_t cause_map(const struct cause_map *map, uint8_t in, uint8_t deflt) -{ - const struct cause_map *m; - - for (m = map; m->cause_in && m->cause_out; m++) { - if (m->cause_in == in) - return m->cause_out; - } - return deflt; -} - -/* how do we map from gtp cause to SM cause */ -static const struct cause_map gtp2sm_cause_map[] = { - { GTPCAUSE_NO_RESOURCES, GSM_CAUSE_INSUFF_RSRC }, - { GTPCAUSE_NOT_SUPPORTED, GSM_CAUSE_SERV_OPT_NOTSUPP }, - { GTPCAUSE_MAN_IE_INCORRECT, GSM_CAUSE_INV_MAND_INFO }, - { GTPCAUSE_MAN_IE_MISSING, GSM_CAUSE_INV_MAND_INFO }, - { GTPCAUSE_OPT_IE_INCORRECT, GSM_CAUSE_PROTO_ERR_UNSPEC }, - { GTPCAUSE_SYS_FAIL, GSM_CAUSE_NET_FAIL }, - { GTPCAUSE_ROAMING_REST, GSM_CAUSE_REQ_SERV_OPT_NOTSUB }, - { GTPCAUSE_PTIMSI_MISMATCH, GSM_CAUSE_PROTO_ERR_UNSPEC }, - { GTPCAUSE_CONN_SUSP, GSM_CAUSE_PROTO_ERR_UNSPEC }, - { GTPCAUSE_AUTH_FAIL, GSM_CAUSE_AUTH_FAILED }, - { GTPCAUSE_USER_AUTH_FAIL, GSM_CAUSE_ACT_REJ_GGSN }, - { GTPCAUSE_CONTEXT_NOT_FOUND, GSM_CAUSE_PROTO_ERR_UNSPEC }, - { GTPCAUSE_ADDR_OCCUPIED, GSM_CAUSE_INSUFF_RSRC }, - { GTPCAUSE_NO_MEMORY, GSM_CAUSE_INSUFF_RSRC }, - { GTPCAUSE_RELOC_FAIL, GSM_CAUSE_PROTO_ERR_UNSPEC }, - { GTPCAUSE_UNKNOWN_MAN_EXTHEADER, GSM_CAUSE_PROTO_ERR_UNSPEC }, - { GTPCAUSE_MISSING_APN, GSM_CAUSE_MISSING_APN }, - { GTPCAUSE_UNKNOWN_PDP, GSM_CAUSE_UNKNOWN_PDP }, - { 0, 0 } -}; - -static int send_act_pdp_cont_acc(struct sgsn_pdp_ctx *pctx) -{ - struct sgsn_signal_data sig_data; - int rc; - struct gprs_llc_lle *lle; - - /* Inform others about it */ - memset(&sig_data, 0, sizeof(sig_data)); - sig_data.pdp = pctx; - osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_ACT, &sig_data); - - /* Send PDP CTX ACT to MS */ - rc = gsm48_tx_gsm_act_pdp_acc(pctx); - if (rc < 0) - return rc; - - if (pctx->mm->ran_type == MM_CTX_T_GERAN_Gb) { - /* Send SNDCP XID to MS */ - lle = &pctx->mm->gb.llme->lle[pctx->sapi]; - rc = sndcp_sn_xid_req(lle,pctx->nsapi); - if (rc < 0) - return rc; - } - - return 0; -} - -/* The GGSN has confirmed the creation of a PDP Context */ -static int create_pdp_conf(struct pdp_t *pdp, void *cbp, int cause) -{ - struct sgsn_pdp_ctx *pctx = cbp; - uint8_t reject_cause; - - LOGPDPCTXP(LOGL_INFO, pctx, "Received CREATE PDP CTX CONF, cause=%d(%s)\n", - cause, get_value_string(gtp_cause_strs, cause)); - - if (!pctx->mm) { - LOGP(DGPRS, LOGL_INFO, - "No MM context, aborting CREATE PDP CTX CONF\n"); - return -EIO; - } - - /* Check for cause value if it was really successful */ - if (cause < 0) { - LOGP(DGPRS, LOGL_NOTICE, "Create PDP ctx req timed out\n"); - if (pdp && pdp->version == 1) { - pdp->version = 0; - gtp_create_context_req(sgsn->gsn, pdp, cbp); - return 0; - } else { - reject_cause = GSM_CAUSE_NET_FAIL; - goto reject; - } - } - - /* Check for cause value if it was really successful */ - if (cause != GTPCAUSE_ACC_REQ) { - reject_cause = cause_map(gtp2sm_cause_map, cause, - GSM_CAUSE_ACT_REJ_GGSN); - goto reject; - } - - if (pctx->mm->ran_type == MM_CTX_T_GERAN_Gb) { - /* Activate the SNDCP layer */ - sndcp_sm_activate_ind(&pctx->mm->gb.llme->lle[pctx->sapi], pctx->nsapi); - return send_act_pdp_cont_acc(pctx); - } else if (pctx->mm->ran_type == MM_CTX_T_UTRAN_Iu) { -#ifdef BUILD_IU - /* Activate a radio bearer */ - iu_rab_act_ps(pdp->nsapi, pctx, 1); - return 0; -#else - return -ENOTSUP; -#endif - } - - LOGP(DGPRS, LOGL_ERROR, "Unknown ran_type %d\n", - pctx->mm->ran_type); - reject_cause = GSM_CAUSE_PROTO_ERR_UNSPEC; - -reject: - /* - * In case of a timeout pdp will be NULL but we have a valid pointer - * in pctx->lib. For other rejects pctx->lib and pdp might be the - * same. - */ - pctx->state = PDP_STATE_NONE; - if (pctx->lib && pctx->lib != pdp) - pdp_freepdp(pctx->lib); - pctx->lib = NULL; - - if (pdp) - pdp_freepdp(pdp); - /* Send PDP CTX ACT REJ to MS */ - gsm48_tx_gsm_act_pdp_rej(pctx->mm, pctx->ti, reject_cause, - 0, NULL); - sgsn_pdp_ctx_free(pctx); - - return EOF; -} - -void sgsn_pdp_upd_gtp_u(struct sgsn_pdp_ctx *pdp, void *addr, size_t alen) -{ - pdp->lib->gsnlu.l = alen; - memcpy(pdp->lib->gsnlu.v, addr, alen); - gtp_update_context(pdp->ggsn->gsn, pdp->lib, pdp, &pdp->lib->hisaddr0); -} - -#ifdef BUILD_IU -/* Callback for RAB assignment response */ -int sgsn_ranap_rab_ass_resp(struct sgsn_mm_ctx *ctx, RANAP_RAB_SetupOrModifiedItemIEs_t *setup_ies) -{ - uint8_t rab_id; - bool require_pdp_update = false; - struct sgsn_pdp_ctx *pdp = NULL; - RANAP_RAB_SetupOrModifiedItem_t *item = &setup_ies->raB_SetupOrModifiedItem; - - rab_id = item->rAB_ID.buf[0]; - - pdp = sgsn_pdp_ctx_by_nsapi(ctx, rab_id); - if (!pdp) { - LOGP(DRANAP, LOGL_ERROR, "RAB Assignment Response for unknown RAB/NSAPI=%u\n", rab_id); - return -1; - } - - if (item->transportLayerAddress) { - LOGPC(DRANAP, LOGL_INFO, " Setup: (%u/%s)", rab_id, osmo_hexdump(item->transportLayerAddress->buf, - item->transportLayerAddress->size)); - switch (item->transportLayerAddress->size) { - case 7: - /* It must be IPv4 inside a X213 NSAP */ - memcpy(pdp->lib->gsnlu.v, &item->transportLayerAddress->buf[3], 4); - break; - case 4: - /* It must be a raw IPv4 address */ - memcpy(pdp->lib->gsnlu.v, item->transportLayerAddress->buf, 4); - break; - case 16: - /* TODO: It must be a raw IPv6 address */ - case 19: - /* TODO: It must be IPv6 inside a X213 NSAP */ - default: - LOGP(DRANAP, LOGL_ERROR, "RAB Assignment Resp: Unknown " - "transport layer address size %u\n", - item->transportLayerAddress->size); - return -1; - } - require_pdp_update = true; - } - - /* The TEI on the RNC side might have changed, too */ - if (item->iuTransportAssociation && - item->iuTransportAssociation->present == RANAP_IuTransportAssociation_PR_gTP_TEI && - item->iuTransportAssociation->choice.gTP_TEI.buf && - item->iuTransportAssociation->choice.gTP_TEI.size >= 4) { - uint32_t tei = osmo_load32be(item->iuTransportAssociation->choice.gTP_TEI.buf); - LOGP(DRANAP, LOGL_DEBUG, "Updating TEID on RNC side from 0x%08x to 0x%08x\n", - pdp->lib->teid_own, tei); - pdp->lib->teid_own = tei; - require_pdp_update = true; - } - - if (require_pdp_update) - gtp_update_context(pdp->ggsn->gsn, pdp->lib, pdp, &pdp->lib->hisaddr0); - - if (pdp->state != PDP_STATE_CR_CONF) { - send_act_pdp_cont_acc(pdp); - pdp->state = PDP_STATE_CR_CONF; - } - return 0; - -} -#endif - -/* Confirmation of a PDP Context Delete */ -static int delete_pdp_conf(struct pdp_t *pdp, void *cbp, int cause) -{ - struct sgsn_signal_data sig_data; - struct sgsn_pdp_ctx *pctx = cbp; - int rc = 0; - - LOGPDPCTXP(LOGL_INFO, pctx, "Received DELETE PDP CTX CONF, cause=%d(%s)\n", - cause, get_value_string(gtp_cause_strs, cause)); - - memset(&sig_data, 0, sizeof(sig_data)); - sig_data.pdp = pctx; - osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_DEACT, &sig_data); - - if (pctx->mm) { - if (pctx->mm->ran_type == MM_CTX_T_GERAN_Gb) { - /* Deactivate the SNDCP layer */ - sndcp_sm_deactivate_ind(&pctx->mm->gb.llme->lle[pctx->sapi], pctx->nsapi); - } else { -#ifdef BUILD_IU - /* Deactivate radio bearer */ - iu_rab_deact(pctx->mm->iu.ue_ctx, 1); -#else - return -ENOTSUP; -#endif - } - - /* Confirm deactivation of PDP context to MS */ - rc = gsm48_tx_gsm_deact_pdp_acc(pctx); - } else { - LOGPDPCTXP(LOGL_NOTICE, pctx, - "Not deactivating SNDCP layer since the MM context " - "is not available\n"); - } - - /* unlink the now non-existing library handle from the pdp - * context */ - pctx->lib = NULL; - - sgsn_pdp_ctx_free(pctx); - - return rc; -} - -/* Confirmation of an GTP ECHO request */ -static int echo_conf(struct pdp_t *pdp, void *cbp, int recovery) -{ - if (recovery < 0) { - LOGP(DGPRS, LOGL_NOTICE, "GTP Echo Request timed out\n"); - /* FIXME: if version == 1, retry with version 0 */ - } else { - DEBUGP(DGPRS, "GTP Rx Echo Response\n"); - } - return 0; -} - -/* Any message received by GGSN contains a recovery IE */ -static int cb_recovery(struct sockaddr_in *peer, uint8_t recovery) -{ - struct sgsn_ggsn_ctx *ggsn; - - ggsn = sgsn_ggsn_ctx_by_addr(&peer->sin_addr); - if (!ggsn) { - LOGP(DGPRS, LOGL_NOTICE, "Received Recovery IE for unknown GGSN\n"); - return -EINVAL; - } - - if (ggsn->remote_restart_ctr == -1) { - /* First received ECHO RESPONSE, note the restart ctr */ - ggsn->remote_restart_ctr = recovery; - } else if (ggsn->remote_restart_ctr != recovery) { - /* counter has changed (GGSN restart): release all PDP */ - LOGP(DGPRS, LOGL_NOTICE, "GGSN recovery (%u->%u), " - "releasing all PDP contexts\n", - ggsn->remote_restart_ctr, recovery); - ggsn->remote_restart_ctr = recovery; - drop_all_pdp_for_ggsn(ggsn); - } - return 0; -} - -/* libgtp callback for confirmations */ -static int cb_conf(int type, int cause, struct pdp_t *pdp, void *cbp) -{ - DEBUGP(DGPRS, "libgtp cb_conf(type=%d, cause=%d, pdp=%p, cbp=%p)\n", - type, cause, pdp, cbp); - - if (cause == EOF) - LOGP(DGPRS, LOGL_ERROR, "libgtp EOF (type=%u, pdp=%p, cbp=%p)\n", - type, pdp, cbp); - - switch (type) { - case GTP_ECHO_REQ: - /* libgtp hands us the RECOVERY number instead of a cause */ - return echo_conf(pdp, cbp, cause); - case GTP_CREATE_PDP_REQ: - return create_pdp_conf(pdp, cbp, cause); - case GTP_DELETE_PDP_REQ: - return delete_pdp_conf(pdp, cbp, cause); - default: - break; - } - return 0; -} - -/* Called whenever a PDP context is deleted for any reason */ -static int cb_delete_context(struct pdp_t *pdp) -{ - LOGP(DGPRS, LOGL_INFO, "PDP Context was deleted\n"); - return 0; -} - -/* Called when we receive a Version Not Supported message */ -static int cb_unsup_ind(struct sockaddr_in *peer) -{ - LOGP(DGPRS, LOGL_INFO, "GTP Version not supported Indication " - "from %s:%u\n", inet_ntoa(peer->sin_addr), - ntohs(peer->sin_port)); - return 0; -} - -/* Called when we receive a Supported Ext Headers Notification */ -static int cb_extheader_ind(struct sockaddr_in *peer) -{ - LOGP(DGPRS, LOGL_INFO, "GTP Supported Ext Headers Noficiation " - "from %s:%u\n", inet_ntoa(peer->sin_addr), - ntohs(peer->sin_port)); - return 0; -} - -/* Called whenever we recive a DATA packet */ -static int cb_data_ind(struct pdp_t *lib, void *packet, unsigned int len) -{ - struct bssgp_paging_info pinfo; - struct sgsn_pdp_ctx *pdp; - struct sgsn_mm_ctx *mm; - struct msgb *msg; - uint8_t *ud; - - pdp = lib->priv; - if (!pdp) { - LOGP(DGPRS, LOGL_NOTICE, - "GTP DATA IND from GGSN for unknown PDP\n"); - return -EIO; - } - mm = pdp->mm; - if (!mm) { - LOGP(DGPRS, LOGL_ERROR, - "PDP context (address=%u) without MM context!\n", - pdp->address); - return -EIO; - } - - DEBUGP(DGPRS, "GTP DATA IND from GGSN for %s, length=%u\n", mm->imsi, - len); - - if (mm->ran_type == MM_CTX_T_UTRAN_Iu) { -#ifdef BUILD_IU - /* Ignore the packet for now and page the UE to get the RAB - * reestablished */ - iu_page_ps(mm->imsi, &mm->p_tmsi, mm->ra.lac, mm->ra.rac); - - return 0; -#else - return -ENOTSUP; -#endif - } - - msg = msgb_alloc_headroom(len+256, 128, "GTP->SNDCP"); - ud = msgb_put(msg, len); - memcpy(ud, packet, len); - - msgb_tlli(msg) = mm->gb.tlli; - msgb_bvci(msg) = mm->gb.bvci; - msgb_nsei(msg) = mm->gb.nsei; - - switch (mm->gmm_state) { - case GMM_REGISTERED_SUSPENDED: - /* initiate PS PAGING procedure */ - memset(&pinfo, 0, sizeof(pinfo)); - pinfo.mode = BSSGP_PAGING_PS; - pinfo.scope = BSSGP_PAGING_BVCI; - pinfo.bvci = mm->gb.bvci; - pinfo.imsi = mm->imsi; - pinfo.ptmsi = &mm->p_tmsi; - pinfo.drx_params = mm->drx_parms; - pinfo.qos[0] = 0; // FIXME - bssgp_tx_paging(mm->gb.nsei, 0, &pinfo); - rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PAGING_PS]); - /* FIXME: queue the packet we received from GTP */ - break; - case GMM_REGISTERED_NORMAL: - break; - default: - LOGP(DGPRS, LOGL_ERROR, "GTP DATA IND for TLLI %08X in state " - "%u\n", mm->gb.tlli, mm->gmm_state); - msgb_free(msg); - return -1; - } - - rate_ctr_inc(&pdp->ctrg->ctr[PDP_CTR_PKTS_UDATA_OUT]); - rate_ctr_add(&pdp->ctrg->ctr[PDP_CTR_BYTES_UDATA_OUT], len); - rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_UDATA_OUT]); - rate_ctr_add(&mm->ctrg->ctr[GMM_CTR_BYTES_UDATA_OUT], len); - - /* It is easier to have a global count */ - pdp->cdr_bytes_out += len; - - return sndcp_unitdata_req(msg, &mm->gb.llme->lle[pdp->sapi], - pdp->nsapi, mm); -} - -/* Called by SNDCP when it has received/re-assembled a N-PDU */ -int sgsn_rx_sndcp_ud_ind(struct gprs_ra_id *ra_id, int32_t tlli, uint8_t nsapi, - struct msgb *msg, uint32_t npdu_len, uint8_t *npdu) -{ - struct sgsn_mm_ctx *mmctx; - struct sgsn_pdp_ctx *pdp; - - /* look-up the MM context for this message */ - mmctx = sgsn_mm_ctx_by_tlli(tlli, ra_id); - if (!mmctx) { - LOGP(DGPRS, LOGL_ERROR, - "Cannot find MM CTX for TLLI %08x\n", tlli); - return -EIO; - } - /* look-up the PDP context for this message */ - pdp = sgsn_pdp_ctx_by_nsapi(mmctx, nsapi); - if (!pdp) { - LOGP(DGPRS, LOGL_ERROR, "Cannot find PDP CTX for " - "TLLI=%08x, NSAPI=%u\n", tlli, nsapi); - return -EIO; - } - if (!pdp->lib) { - LOGP(DGPRS, LOGL_ERROR, "PDP CTX without libgtp\n"); - return -EIO; - } - - rate_ctr_inc(&pdp->ctrg->ctr[PDP_CTR_PKTS_UDATA_IN]); - rate_ctr_add(&pdp->ctrg->ctr[PDP_CTR_BYTES_UDATA_IN], npdu_len); - rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_UDATA_IN]); - rate_ctr_add(&mmctx->ctrg->ctr[GMM_CTR_BYTES_UDATA_IN], npdu_len); - - /* It is easier to have a global count */ - pdp->cdr_bytes_in += npdu_len; - - return gtp_data_req(pdp->ggsn->gsn, pdp->lib, npdu, npdu_len); -} - -/* libgtp select loop integration */ -static int sgsn_gtp_fd_cb(struct osmo_fd *fd, unsigned int what) -{ - struct sgsn_instance *sgi = fd->data; - int rc; - - if (!(what & BSC_FD_READ)) - return 0; - - switch (fd->priv_nr) { - case 0: - rc = gtp_decaps0(sgi->gsn); - break; - case 1: - rc = gtp_decaps1c(sgi->gsn); - break; - case 2: - rc = gtp_decaps1u(sgi->gsn); - break; - default: - rc = -EINVAL; - break; - } - return rc; -} - -static void sgsn_gtp_tmr_start(struct sgsn_instance *sgi) -{ - struct timeval next; - - /* Retrieve next retransmission as struct timeval */ - gtp_retranstimeout(sgi->gsn, &next); - - /* re-schedule the timer */ - osmo_timer_schedule(&sgi->gtp_timer, next.tv_sec, next.tv_usec/1000); -} - -/* timer callback for libgtp retransmissions and ping */ -static void sgsn_gtp_tmr_cb(void *data) -{ - struct sgsn_instance *sgi = data; - - /* Do all the retransmissions as needed */ - gtp_retrans(sgi->gsn); - - sgsn_gtp_tmr_start(sgi); -} - -int sgsn_gtp_init(struct sgsn_instance *sgi) -{ - int rc; - struct gsn_t *gsn; - - rc = gtp_new(&sgi->gsn, sgi->cfg.gtp_statedir, - &sgi->cfg.gtp_listenaddr.sin_addr, GTP_MODE_SGSN); - if (rc) { - LOGP(DGPRS, LOGL_ERROR, "Failed to create GTP: %d\n", rc); - return rc; - } - gsn = sgi->gsn; - - sgi->gtp_fd0.fd = gsn->fd0; - sgi->gtp_fd0.priv_nr = 0; - sgi->gtp_fd0.data = sgi; - sgi->gtp_fd0.when = BSC_FD_READ; - sgi->gtp_fd0.cb = sgsn_gtp_fd_cb; - rc = osmo_fd_register(&sgi->gtp_fd0); - if (rc < 0) - return rc; - - sgi->gtp_fd1c.fd = gsn->fd1c; - sgi->gtp_fd1c.priv_nr = 1; - sgi->gtp_fd1c.data = sgi; - sgi->gtp_fd1c.when = BSC_FD_READ; - sgi->gtp_fd1c.cb = sgsn_gtp_fd_cb; - rc = osmo_fd_register(&sgi->gtp_fd1c); - if (rc < 0) { - osmo_fd_unregister(&sgi->gtp_fd0); - return rc; - } - - sgi->gtp_fd1u.fd = gsn->fd1u; - sgi->gtp_fd1u.priv_nr = 2; - sgi->gtp_fd1u.data = sgi; - sgi->gtp_fd1u.when = BSC_FD_READ; - sgi->gtp_fd1u.cb = sgsn_gtp_fd_cb; - rc = osmo_fd_register(&sgi->gtp_fd1u); - if (rc < 0) { - osmo_fd_unregister(&sgi->gtp_fd0); - osmo_fd_unregister(&sgi->gtp_fd1c); - return rc; - } - - /* Start GTP re-transmission timer */ - osmo_timer_setup(&sgi->gtp_timer, sgsn_gtp_tmr_cb, sgi); - sgsn_gtp_tmr_start(sgi); - - /* Register callbackcs with libgtp */ - gtp_set_cb_delete_context(gsn, cb_delete_context); - gtp_set_cb_conf(gsn, cb_conf); - gtp_set_cb_recovery(gsn, cb_recovery); - gtp_set_cb_data_ind(gsn, cb_data_ind); - gtp_set_cb_unsup_ind(gsn, cb_unsup_ind); - gtp_set_cb_extheader_ind(gsn, cb_extheader_ind); - - return 0; -} diff --git a/openbsc/src/gprs/sgsn_main.c b/openbsc/src/gprs/sgsn_main.c deleted file mode 100644 index c1da585d4..000000000 --- a/openbsc/src/gprs/sgsn_main.c +++ /dev/null @@ -1,464 +0,0 @@ -/* GPRS SGSN Implementation */ - -/* (C) 2010 by Harald Welte <laforge@gnumonks.org> - * (C) 2010 by On-Waves - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <unistd.h> -#include <stdio.h> -#include <time.h> -#include <stdlib.h> -#include <string.h> -#include <getopt.h> -#include <errno.h> -#include <signal.h> -#include <sys/fcntl.h> -#include <sys/stat.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <arpa/inet.h> - -#include <osmocom/core/application.h> -#include <osmocom/core/talloc.h> -#include <osmocom/core/select.h> -#include <osmocom/core/rate_ctr.h> -#include <osmocom/core/logging.h> -#include <osmocom/core/stats.h> - -#include <osmocom/gprs/gprs_ns.h> -#include <osmocom/gprs/gprs_bssgp.h> - -#include <osmocom/vty/telnet_interface.h> -#include <osmocom/vty/logging.h> -#include <osmocom/vty/stats.h> -#include <osmocom/vty/ports.h> - -#include <osmocom/ctrl/control_vty.h> - -#include <openbsc/signal.h> -#include <openbsc/debug.h> -#include <openbsc/vty.h> -#include <openbsc/sgsn.h> -#include <openbsc/gprs_llc.h> -#include <openbsc/gprs_gmm.h> -#include <openbsc/iu.h> - -#include <osmocom/ctrl/control_if.h> -#include <osmocom/ctrl/ports.h> - -#include <gtp.h> - -#include "../../bscconfig.h" - -#define _GNU_SOURCE -#include <getopt.h> - -void *tall_bsc_ctx; - -struct gprs_ns_inst *sgsn_nsi; -static int daemonize = 0; -const char *openbsc_copyright = - "Copyright (C) 2010 Harald Welte and On-Waves\r\n" - "License AGPLv3+: GNU AGPL version 3 or later <http://gnu.org/licenses/agpl-3.0.html>\r\n" - "This is free software: you are free to change and redistribute it.\r\n" - "There is NO WARRANTY, to the extent permitted by law.\r\n"; - -static struct sgsn_instance sgsn_inst = { - .config_file = "osmo_sgsn.cfg", - .cfg = { - .gtp_statedir = "./", - .auth_policy = SGSN_AUTH_POLICY_CLOSED, - }, -}; -struct sgsn_instance *sgsn = &sgsn_inst; - -/* call-back function for the NS protocol */ -static int sgsn_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc, - struct msgb *msg, uint16_t bvci) -{ - int rc = 0; - - switch (event) { - case GPRS_NS_EVT_UNIT_DATA: - /* hand the message into the BSSGP implementation */ - rc = bssgp_rcvmsg(msg); - break; - default: - LOGP(DGPRS, LOGL_ERROR, "SGSN: Unknown event %u from NS\n", event); - if (msg) - msgb_free(msg); - rc = -EIO; - break; - } - return rc; -} - -/* call-back function for the BSSGP protocol */ -int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) -{ - struct osmo_bssgp_prim *bp; - bp = container_of(oph, struct osmo_bssgp_prim, oph); - - switch (oph->sap) { - case SAP_BSSGP_LL: - switch (oph->primitive) { - case PRIM_BSSGP_UL_UD: - return gprs_llc_rcvmsg(oph->msg, bp->tp); - } - break; - case SAP_BSSGP_GMM: - switch (oph->primitive) { - case PRIM_BSSGP_GMM_SUSPEND: - return gprs_gmm_rx_suspend(bp->ra_id, bp->tlli); - case PRIM_BSSGP_GMM_RESUME: - return gprs_gmm_rx_resume(bp->ra_id, bp->tlli, - bp->u.resume.suspend_ref); - } - break; - case SAP_BSSGP_NM: - break; - } - return 0; -} - -static void signal_handler(int signal) -{ - fprintf(stdout, "signal %u received\n", signal); - - switch (signal) { - case SIGINT: - case SIGTERM: - osmo_signal_dispatch(SS_L_GLOBAL, S_L_GLOBAL_SHUTDOWN, NULL); - sleep(1); - exit(0); - break; - case SIGABRT: - /* in case of abort, we want to obtain a talloc report - * and then return to the caller, who will abort the process */ - case SIGUSR1: - talloc_report(tall_vty_ctx, stderr); - talloc_report_full(tall_bsc_ctx, stderr); - break; - case SIGUSR2: - talloc_report_full(tall_vty_ctx, stderr); - break; - default: - break; - } -} - -/* NSI that BSSGP uses when transmitting on NS */ -extern struct gprs_ns_inst *bssgp_nsi; - -extern int bsc_vty_go_parent(struct vty *vty); - -static struct vty_app_info vty_info = { - .name = "OsmoSGSN", - .version = PACKAGE_VERSION, - .go_parent_cb = bsc_vty_go_parent, - .is_config_node = bsc_vty_is_config_node, -}; - -static void print_help(void) -{ - printf("Some useful help...\n"); - printf(" -h --help\tthis text\n"); - printf(" -D --daemonize\tFork the process into a background daemon\n"); - printf(" -d option --debug\tenable Debugging\n"); - printf(" -s --disable-color\n"); - printf(" -c --config-file\tThe config file to use [%s]\n", sgsn->config_file); - printf(" -e --log-level number\tSet a global log level\n"); -} - -static void handle_options(int argc, char **argv) -{ - while (1) { - int option_index = 0, c; - static struct option long_options[] = { - {"help", 0, 0, 'h'}, - {"debug", 1, 0, 'd'}, - {"daemonize", 0, 0, 'D'}, - {"config-file", 1, 0, 'c'}, - {"disable-color", 0, 0, 's'}, - {"timestamp", 0, 0, 'T'}, - { "version", 0, 0, 'V' }, - {"log-level", 1, 0, 'e'}, - {NULL, 0, 0, 0} - }; - - c = getopt_long(argc, argv, "hd:Dc:sTVe:", - long_options, &option_index); - if (c == -1) - break; - - switch (c) { - case 'h': - //print_usage(); - print_help(); - exit(0); - case 's': - log_set_use_color(osmo_stderr_target, 0); - break; - case 'd': - log_parse_category_mask(osmo_stderr_target, optarg); - break; - case 'D': - daemonize = 1; - break; - case 'c': - sgsn_inst.config_file = strdup(optarg); - break; - case 'T': - log_set_print_timestamp(osmo_stderr_target, 1); - break; - case 'V': - print_version(1); - exit(0); - break; - case 'e': - log_set_log_level(osmo_stderr_target, atoi(optarg)); - break; - default: - /* ignore */ - break; - } - } -} - -/* default categories */ -static struct log_info_cat gprs_categories[] = { - [DMM] = { - .name = "DMM", - .description = "Layer3 Mobility Management (MM)", - .color = "\033[1;33m", - .enabled = 1, .loglevel = LOGL_NOTICE, - }, - [DPAG] = { - .name = "DPAG", - .description = "Paging Subsystem", - .color = "\033[1;38m", - .enabled = 1, .loglevel = LOGL_NOTICE, - }, - [DMEAS] = { - .name = "DMEAS", - .description = "Radio Measurement Processing", - .enabled = 0, .loglevel = LOGL_NOTICE, - }, - [DREF] = { - .name = "DREF", - .description = "Reference Counting", - .enabled = 0, .loglevel = LOGL_NOTICE, - }, - [DGPRS] = { - .name = "DGPRS", - .description = "GPRS Packet Service", - .enabled = 1, .loglevel = LOGL_DEBUG, - }, - [DNS] = { - .name = "DNS", - .description = "GPRS Network Service (NS)", - .enabled = 1, .loglevel = LOGL_INFO, - }, - [DBSSGP] = { - .name = "DBSSGP", - .description = "GPRS BSS Gateway Protocol (BSSGP)", - .enabled = 1, .loglevel = LOGL_DEBUG, - }, - [DLLC] = { - .name = "DLLC", - .description = "GPRS Logical Link Control Protocol (LLC)", - .enabled = 1, .loglevel = LOGL_DEBUG, - }, - [DSNDCP] = { - .name = "DSNDCP", - .description = "GPRS Sub-Network Dependent Control Protocol (SNDCP)", - .enabled = 1, .loglevel = LOGL_DEBUG, - }, - [DRANAP] = { - .name = "DRANAP", - .description = "RAN Application Part (RANAP)", - .enabled = 1, .loglevel = LOGL_DEBUG, - }, - [DSUA] = { - .name = "DSUA", - .description = "SCCP User Adaptation (SUA)", - .enabled = 1, .loglevel = LOGL_DEBUG, - }, - [DSLHC] = { - .name = "DSLHC", - .description = "RFC1144 TCP/IP Header compression (SLHC)", - .enabled = 1, .loglevel = LOGL_DEBUG, - }, - [DV42BIS] = { - .name = "DV42BIS", - .description = "V.42bis data compression (SNDCP)", - .enabled = 1, .loglevel = LOGL_DEBUG, - } -}; - -static const struct log_info gprs_log_info = { - .filter_fn = gprs_log_filter_fn, - .cat = gprs_categories, - .num_cat = ARRAY_SIZE(gprs_categories), -}; - -/* Implement the extern asn_debug from libasn1c to indicate whether the ASN.1 - * binary code decoded and encoded during Iu communication should be logged to - * stderr. See osmocom's libasn1c, asn_internal.h, at "if (asn_debug)": - * http://git.osmocom.org/libasn1c/tree/include/asn1c/asn_internal.h */ -int asn_debug = 0; - -int sgsn_ranap_iu_event(struct ue_conn_ctx *ctx, enum iu_event_type type, void *data); - -int main(int argc, char **argv) -{ - struct ctrl_handle *ctrl; - struct gsm_network dummy_network; - int rc; - - srand(time(NULL)); - tall_bsc_ctx = talloc_named_const(NULL, 0, "osmo_sgsn"); - msgb_talloc_ctx_init(tall_bsc_ctx, 0); - - signal(SIGINT, &signal_handler); - signal(SIGTERM, &signal_handler); - signal(SIGABRT, &signal_handler); - signal(SIGUSR1, &signal_handler); - signal(SIGUSR2, &signal_handler); - - osmo_init_ignore_signals(); - osmo_init_logging(&gprs_log_info); - osmo_stats_init(tall_bsc_ctx); - - vty_info.copyright = openbsc_copyright; - vty_init(&vty_info); - logging_vty_add_cmds(NULL); - osmo_stats_vty_add_cmds(&gprs_log_info); - sgsn_vty_init(); - ctrl_vty_init(tall_bsc_ctx); -#ifdef BUILD_IU - iu_vty_init(&asn_debug); -#endif - - handle_options(argc, argv); - - rate_ctr_init(tall_bsc_ctx); - - gprs_ns_set_log_ss(DNS); - bssgp_set_log_ss(DBSSGP); - - sgsn_nsi = gprs_ns_instantiate(&sgsn_ns_cb, tall_bsc_ctx); - if (!sgsn_nsi) { - LOGP(DGPRS, LOGL_ERROR, "Unable to instantiate NS\n"); - exit(1); - } - bssgp_nsi = sgsn_inst.cfg.nsi = sgsn_nsi; - - gprs_llc_init("/usr/local/lib/osmocom/crypt/"); - sgsn_rate_ctr_init(); - sgsn_inst_init(); - - gprs_ns_vty_init(bssgp_nsi); - bssgp_vty_init(); - gprs_llc_vty_init(); - gprs_sndcp_vty_init(); - sgsn_auth_init(); - sgsn_cdr_init(&sgsn_inst); - /* FIXME: register signal handler for SS_L_NS */ - - rc = sgsn_parse_config(sgsn_inst.config_file, &sgsn_inst.cfg); - if (rc < 0) { - LOGP(DGPRS, LOGL_FATAL, "Error in config file\n"); - exit(2); - } - - /* start telnet after reading config for vty_get_bind_addr() */ - rc = telnet_init_dynif(tall_bsc_ctx, &dummy_network, - vty_get_bind_addr(), OSMO_VTY_PORT_SGSN); - if (rc < 0) - exit(1); - - /* start control interface after reading config for - * ctrl_vty_get_bind_addr() */ - ctrl = sgsn_controlif_setup(NULL, ctrl_vty_get_bind_addr(), - OSMO_CTRL_PORT_SGSN); - if (!ctrl) { - LOGP(DGPRS, LOGL_ERROR, "Failed to create CTRL interface.\n"); - exit(1); - } - - if (sgsn_ctrl_cmds_install() != 0) { - LOGP(DGPRS, LOGL_ERROR, "Failed to install CTRL commands.\n"); - exit(1); - } - - - rc = sgsn_gtp_init(&sgsn_inst); - if (rc) { - LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen on GTP socket\n"); - exit(2); - } - - rc = gprs_subscr_init(&sgsn_inst); - if (rc < 0) { - LOGP(DGPRS, LOGL_FATAL, "Cannot set up subscriber management\n"); - exit(2); - } - - rc = gprs_ns_nsip_listen(sgsn_nsi); - if (rc < 0) { - LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen on NSIP socket\n"); - exit(2); - } - - rc = gprs_ns_frgre_listen(sgsn_nsi); - if (rc < 0) { - LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen GRE " - "socket. Do you have CAP_NET_RAW?\n"); - exit(2); - } - - if (sgsn->cfg.dynamic_lookup) { - if (sgsn_ares_init(sgsn) != 0) { - LOGP(DGPRS, LOGL_FATAL, - "Failed to initialize c-ares(%d)\n", rc); - exit(4); - } - } - -#ifdef BUILD_IU - iu_init(tall_bsc_ctx, "127.0.0.2", 14001, gsm0408_gprs_rcvmsg_iu, sgsn_ranap_iu_event); -#endif - - if (daemonize) { - rc = osmo_daemonize(); - if (rc < 0) { - perror("Error during daemonize"); - exit(1); - } - } - - while (1) { - rc = osmo_select_main(0); - if (rc < 0) - exit(3); - } - - /* not reached */ - exit(0); -} diff --git a/openbsc/src/gprs/sgsn_vty.c b/openbsc/src/gprs/sgsn_vty.c deleted file mode 100644 index d4447e13a..000000000 --- a/openbsc/src/gprs/sgsn_vty.c +++ /dev/null @@ -1,1312 +0,0 @@ -/* - * (C) 2010-2016 by Harald Welte <laforge@gnumonks.org> - * (C) 2010 by On-Waves - * (C) 2015 by Holger Hans Peter Freyther - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <sys/socket.h> -#include <netinet/in.h> -#include <arpa/inet.h> -#include <time.h> - -#include <osmocom/core/talloc.h> -#include <osmocom/core/utils.h> -#include <osmocom/core/rate_ctr.h> -#include <osmocom/gsm/protocol/gsm_04_08_gprs.h> -#include <osmocom/gsm/apn.h> - -#include <openbsc/debug.h> -#include <openbsc/sgsn.h> -#include <osmocom/gprs/gprs_ns.h> -#include <openbsc/gprs_sgsn.h> -#include <openbsc/vty.h> -#include <openbsc/gsup_client.h> - -#include <osmocom/vty/command.h> -#include <osmocom/vty/vty.h> -#include <osmocom/vty/misc.h> -#include <osmocom/crypt/gprs_cipher.h> -#include <osmocom/abis/ipa.h> - -#include <pdp.h> - -static struct sgsn_config *g_cfg = NULL; - -const struct value_string sgsn_auth_pol_strs[] = { - { SGSN_AUTH_POLICY_OPEN, "accept-all" }, - { SGSN_AUTH_POLICY_CLOSED, "closed" }, - { SGSN_AUTH_POLICY_ACL_ONLY, "acl-only" }, - { SGSN_AUTH_POLICY_REMOTE, "remote" }, - { 0, NULL } -}; - -/* Section 11.2.2 / Table 11.3a GPRS Mobility management timers – MS side */ -#define GSM0408_T3312_SECS (10*60) /* periodic RAU interval, default 54min */ - -/* Section 11.2.2 / Table 11.4 MM timers netwokr side */ -#define GSM0408_T3322_SECS 6 /* DETACH_REQ -> DETACH_ACC */ -#define GSM0408_T3350_SECS 6 /* waiting for ATT/RAU/TMSI COMPL */ -#define GSM0408_T3360_SECS 6 /* waiting for AUTH/CIPH RESP */ -#define GSM0408_T3370_SECS 6 /* waiting for ID RESP */ - -/* Section 11.2.2 / Table 11.4a MM timers network side */ -#define GSM0408_T3313_SECS 30 /* waiting for paging response */ -#define GSM0408_T3314_SECS 44 /* force to STBY on expiry, Ready timer */ -#define GSM0408_T3316_SECS 44 - -/* Section 11.3 / Table 11.2d Timers of Session Management - network side */ -#define GSM0408_T3385_SECS 8 /* wait for ACT PDP CTX REQ */ -#define GSM0408_T3386_SECS 8 /* wait for MODIFY PDP CTX ACK */ -#define GSM0408_T3395_SECS 8 /* wait for DEACT PDP CTX ACK */ -#define GSM0408_T3397_SECS 8 /* wait for DEACT AA PDP CTX ACK */ - -#define DECLARE_TIMER(number, doc) \ - DEFUN(cfg_sgsn_T##number, \ - cfg_sgsn_T##number##_cmd, \ - "timer t" #number " <0-65535>", \ - "Configure GPRS Timers\n" \ - doc "\nTimer Value in seconds\n") \ -{ \ - int value = atoi(argv[0]); \ - \ - if (value < 0 || value > 65535) { \ - vty_out(vty, "Timer value %s out of range.%s", \ - argv[0], VTY_NEWLINE); \ - return CMD_WARNING; \ - } \ - \ - g_cfg->timers.T##number = value; \ - return CMD_SUCCESS; \ -} - -DECLARE_TIMER(3312, "Periodic RA Update timer (s)") -DECLARE_TIMER(3322, "Detach request -> accept timer (s)") -DECLARE_TIMER(3350, "Waiting for ATT/RAU/TMSI_COMPL timer (s)") -DECLARE_TIMER(3360, "Waiting for AUTH/CIPH response timer (s)") -DECLARE_TIMER(3370, "Waiting for IDENTITY response timer (s)") - -DECLARE_TIMER(3313, "Waiting for paging response timer (s)") -DECLARE_TIMER(3314, "Force to STANDBY on expiry timer (s)") -DECLARE_TIMER(3316, "AA-Ready timer (s)") - -DECLARE_TIMER(3385, "Wait for ACT PDP CTX REQ timer (s)") -DECLARE_TIMER(3386, "Wait for MODIFY PDP CTX ACK timer (s)") -DECLARE_TIMER(3395, "Wait for DEACT PDP CTX ACK timer (s)") -DECLARE_TIMER(3397, "Wait for DEACT AA PDP CTX ACK timer (s)") - - -#define GSM48_MAX_APN_LEN 102 /* 10.5.6.1 */ -/** Copy apn to a static buffer, replacing the length octets in apn_enc with '.' - * and terminating with a '\0'. Return the static buffer. - * len: the length of the encoded APN (which has no terminating zero). - */ -static char *gprs_apn2str(uint8_t *apn, unsigned int len) -{ - static char apnbuf[GSM48_MAX_APN_LEN+1]; - - if (!apn) - return ""; - osmo_apn_to_str(apnbuf, apn, len); - - return apnbuf+1; -} - -char *gprs_pdpaddr2str(uint8_t *pdpa, uint8_t len) -{ - static char str[INET6_ADDRSTRLEN + 10]; - - if (!pdpa || len < 2) - return "none"; - - switch (pdpa[0] & 0x0f) { - case PDP_TYPE_ORG_IETF: - switch (pdpa[1]) { - case PDP_TYPE_N_IETF_IPv4: - if (len < 2 + 4) - break; - strcpy(str, "IPv4 "); - inet_ntop(AF_INET, pdpa+2, str+5, sizeof(str)-5); - return str; - case PDP_TYPE_N_IETF_IPv6: - if (len < 2 + 8) - break; - strcpy(str, "IPv6 "); - inet_ntop(AF_INET6, pdpa+2, str+5, sizeof(str)-5); - return str; - default: - break; - } - break; - case PDP_TYPE_ORG_ETSI: - if (pdpa[1] == PDP_TYPE_N_ETSI_PPP) - return "PPP"; - break; - default: - break; - } - - return "invalid"; -} - -static struct cmd_node sgsn_node = { - SGSN_NODE, - "%s(config-sgsn)# ", - 1, -}; - -static int config_write_sgsn(struct vty *vty) -{ - struct sgsn_ggsn_ctx *gctx; - struct imsi_acl_entry *acl; - struct apn_ctx *actx; - struct ares_addr_node *server; - - vty_out(vty, "sgsn%s", VTY_NEWLINE); - - vty_out(vty, " gtp local-ip %s%s", - inet_ntoa(g_cfg->gtp_listenaddr.sin_addr), VTY_NEWLINE); - - llist_for_each_entry(gctx, &sgsn_ggsn_ctxts, list) { - if (gctx->id == UINT32_MAX) - continue; - - vty_out(vty, " ggsn %u remote-ip %s%s", gctx->id, - inet_ntoa(gctx->remote_addr), VTY_NEWLINE); - vty_out(vty, " ggsn %u gtp-version %u%s", gctx->id, - gctx->gtp_version, VTY_NEWLINE); - } - - if (sgsn->cfg.dynamic_lookup) - vty_out(vty, " ggsn dynamic%s", VTY_NEWLINE); - - for (server = sgsn->ares_servers; server; server = server->next) - vty_out(vty, " grx-dns-add %s%s", inet_ntoa(server->addr.addr4), VTY_NEWLINE); - - if (g_cfg->cipher != GPRS_ALGO_GEA0) - vty_out(vty, " encryption %s%s", - get_value_string(gprs_cipher_names, g_cfg->cipher), - VTY_NEWLINE); - if (g_cfg->gsup_server_addr.sin_addr.s_addr) - vty_out(vty, " gsup remote-ip %s%s", - inet_ntoa(g_cfg->gsup_server_addr.sin_addr), VTY_NEWLINE); - if (g_cfg->gsup_server_port) - vty_out(vty, " gsup remote-port %d%s", - g_cfg->gsup_server_port, VTY_NEWLINE); - vty_out(vty, " auth-policy %s%s", - get_value_string(sgsn_auth_pol_strs, g_cfg->auth_policy), - VTY_NEWLINE); - - vty_out(vty, " gsup oap-id %d%s", - (int)g_cfg->oap.client_id, VTY_NEWLINE); - if (g_cfg->oap.secret_k_present != 0) - vty_out(vty, " gsup oap-k %s%s", - osmo_hexdump_nospc(g_cfg->oap.secret_k, sizeof(g_cfg->oap.secret_k)), - VTY_NEWLINE); - if (g_cfg->oap.secret_opc_present != 0) - vty_out(vty, " gsup oap-opc %s%s", - osmo_hexdump_nospc(g_cfg->oap.secret_opc, sizeof(g_cfg->oap.secret_opc)), - VTY_NEWLINE); - - llist_for_each_entry(acl, &g_cfg->imsi_acl, list) - vty_out(vty, " imsi-acl add %s%s", acl->imsi, VTY_NEWLINE); - - if (llist_empty(&sgsn_apn_ctxts)) - vty_out(vty, " ! apn * ggsn 0%s", VTY_NEWLINE); - llist_for_each_entry(actx, &sgsn_apn_ctxts, list) { - if (strlen(actx->imsi_prefix) > 0) - vty_out(vty, " apn %s imsi-prefix %s ggsn %u%s", - actx->name, actx->imsi_prefix, actx->ggsn->id, - VTY_NEWLINE); - else - vty_out(vty, " apn %s ggsn %u%s", actx->name, - actx->ggsn->id, VTY_NEWLINE); - } - - if (g_cfg->cdr.filename) - vty_out(vty, " cdr filename %s%s", g_cfg->cdr.filename, VTY_NEWLINE); - else - vty_out(vty, " no cdr filename%s", VTY_NEWLINE); - vty_out(vty, " cdr interval %d%s", g_cfg->cdr.interval, VTY_NEWLINE); - - vty_out(vty, " timer t3312 %d%s", g_cfg->timers.T3312, VTY_NEWLINE); - vty_out(vty, " timer t3322 %d%s", g_cfg->timers.T3322, VTY_NEWLINE); - vty_out(vty, " timer t3350 %d%s", g_cfg->timers.T3350, VTY_NEWLINE); - vty_out(vty, " timer t3360 %d%s", g_cfg->timers.T3360, VTY_NEWLINE); - vty_out(vty, " timer t3370 %d%s", g_cfg->timers.T3370, VTY_NEWLINE); - vty_out(vty, " timer t3313 %d%s", g_cfg->timers.T3313, VTY_NEWLINE); - vty_out(vty, " timer t3314 %d%s", g_cfg->timers.T3314, VTY_NEWLINE); - vty_out(vty, " timer t3316 %d%s", g_cfg->timers.T3316, VTY_NEWLINE); - vty_out(vty, " timer t3385 %d%s", g_cfg->timers.T3385, VTY_NEWLINE); - vty_out(vty, " timer t3386 %d%s", g_cfg->timers.T3386, VTY_NEWLINE); - vty_out(vty, " timer t3395 %d%s", g_cfg->timers.T3395, VTY_NEWLINE); - vty_out(vty, " timer t3397 %d%s", g_cfg->timers.T3397, VTY_NEWLINE); - - if (g_cfg->pcomp_rfc1144.active) { - vty_out(vty, " compression rfc1144 active slots %d%s", - g_cfg->pcomp_rfc1144.s01 + 1, VTY_NEWLINE); - } else if (g_cfg->pcomp_rfc1144.passive) { - vty_out(vty, " compression rfc1144 passive%s", VTY_NEWLINE); - } else - vty_out(vty, " no compression rfc1144%s", VTY_NEWLINE); - - if (g_cfg->dcomp_v42bis.active && g_cfg->dcomp_v42bis.p0 == 1) { - vty_out(vty, - " compression v42bis active direction sgsn codewords %d strlen %d%s", - g_cfg->dcomp_v42bis.p1, g_cfg->dcomp_v42bis.p2, - VTY_NEWLINE); - } else if (g_cfg->dcomp_v42bis.active && g_cfg->dcomp_v42bis.p0 == 2) { - vty_out(vty, - " compression v42bis active direction ms codewords %d strlen %d%s", - g_cfg->dcomp_v42bis.p1, g_cfg->dcomp_v42bis.p2, - VTY_NEWLINE); - } else if (g_cfg->dcomp_v42bis.active && g_cfg->dcomp_v42bis.p0 == 3) { - vty_out(vty, - " compression v42bis active direction both codewords %d strlen %d%s", - g_cfg->dcomp_v42bis.p1, g_cfg->dcomp_v42bis.p2, - VTY_NEWLINE); - } else if (g_cfg->dcomp_v42bis.passive) { - vty_out(vty, " compression v42bis passive%s", VTY_NEWLINE); - } else - vty_out(vty, " no compression v42bis%s", VTY_NEWLINE); - - return CMD_SUCCESS; -} - -#define SGSN_STR "Configure the SGSN\n" -#define GGSN_STR "Configure the GGSN information\n" - -DEFUN(cfg_sgsn, cfg_sgsn_cmd, - "sgsn", - SGSN_STR) -{ - vty->node = SGSN_NODE; - return CMD_SUCCESS; -} - -DEFUN(cfg_sgsn_bind_addr, cfg_sgsn_bind_addr_cmd, - "gtp local-ip A.B.C.D", - "GTP Parameters\n" - "Set the IP address for the local GTP bind\n" - "IPv4 Address\n") -{ - inet_aton(argv[0], &g_cfg->gtp_listenaddr.sin_addr); - - return CMD_SUCCESS; -} - -DEFUN(cfg_ggsn_remote_ip, cfg_ggsn_remote_ip_cmd, - "ggsn <0-255> remote-ip A.B.C.D", - GGSN_STR "GGSN Number\n" IP_STR "IPv4 Address\n") -{ - uint32_t id = atoi(argv[0]); - struct sgsn_ggsn_ctx *ggc = sgsn_ggsn_ctx_find_alloc(id); - - inet_aton(argv[1], &ggc->remote_addr); - - return CMD_SUCCESS; -} - -#if 0 -DEFUN(cfg_ggsn_remote_port, cfg_ggsn_remote_port_cmd, - "ggsn <0-255> remote-port <0-65535>", - "") -{ - uint32_t id = atoi(argv[0]); - struct sgsn_ggsn_ctx *ggc = sgsn_ggsn_ctx_find_alloc(id); - uint16_t port = atoi(argv[1]); - -} -#endif - -DEFUN(cfg_ggsn_gtp_version, cfg_ggsn_gtp_version_cmd, - "ggsn <0-255> gtp-version (0|1)", - GGSN_STR "GGSN Number\n" "GTP Version\n" - "Version 0\n" "Version 1\n") -{ - uint32_t id = atoi(argv[0]); - struct sgsn_ggsn_ctx *ggc = sgsn_ggsn_ctx_find_alloc(id); - - if (atoi(argv[1])) - ggc->gtp_version = 1; - else - ggc->gtp_version = 0; - - return CMD_SUCCESS; -} - -DEFUN(cfg_ggsn_dynamic_lookup, cfg_ggsn_dynamic_lookup_cmd, - "ggsn dynamic", - GGSN_STR "Enable dynamic GRX based look-up (requires restart)\n") -{ - sgsn->cfg.dynamic_lookup = 1; - return CMD_SUCCESS; -} - -DEFUN(cfg_grx_ggsn, cfg_grx_ggsn_cmd, - "grx-dns-add A.B.C.D", - "Add DNS server\nIPv4 address\n") -{ - struct ares_addr_node *node = talloc_zero(tall_bsc_ctx, struct ares_addr_node); - node->family = AF_INET; - inet_aton(argv[0], &node->addr.addr4); - - node->next = sgsn->ares_servers; - sgsn->ares_servers = node; - return CMD_SUCCESS; -} - -#define APN_STR "Configure the information per APN\n" -#define APN_GW_STR "The APN gateway name optionally prefixed by '*' (wildcard)\n" - -static int add_apn_ggsn_mapping(struct vty *vty, const char *apn_str, - const char *imsi_prefix, int ggsn_id) -{ - struct apn_ctx *actx; - struct sgsn_ggsn_ctx *ggsn; - - ggsn = sgsn_ggsn_ctx_by_id(ggsn_id); - if (ggsn == NULL) { - vty_out(vty, "%% a GGSN with id %d has not been defined%s", - ggsn_id, VTY_NEWLINE); - return CMD_WARNING; - } - - actx = sgsn_apn_ctx_find_alloc(apn_str, imsi_prefix); - if (!actx) { - vty_out(vty, "%% unable to create APN context for %s/%s%s", - apn_str, imsi_prefix, VTY_NEWLINE); - return CMD_WARNING; - } - - actx->ggsn = ggsn; - - return CMD_SUCCESS; -} - -DEFUN(cfg_apn_ggsn, cfg_apn_ggsn_cmd, - "apn APNAME ggsn <0-255>", - APN_STR APN_GW_STR - "Select the GGSN to use when the APN gateway prefix matches\n" - "The GGSN id") -{ - - return add_apn_ggsn_mapping(vty, argv[0], "", atoi(argv[1])); -} - -DEFUN(cfg_apn_imsi_ggsn, cfg_apn_imsi_ggsn_cmd, - "apn APNAME imsi-prefix IMSIPRE ggsn <0-255>", - APN_STR APN_GW_STR - "Restrict rule to a certain IMSI prefix\n" - "An IMSI prefix\n" - "Select the GGSN to use when APN gateway and IMSI prefix match\n" - "The GGSN id") -{ - - return add_apn_ggsn_mapping(vty, argv[0], argv[1], atoi(argv[2])); -} - -const struct value_string gprs_mm_st_strs[] = { - { GMM_DEREGISTERED, "DEREGISTERED" }, - { GMM_COMMON_PROC_INIT, "COMMON PROCEDURE (INIT)" }, - { GMM_REGISTERED_NORMAL, "REGISTERED (NORMAL)" }, - { GMM_REGISTERED_SUSPENDED, "REGISTERED (SUSPENDED)" }, - { GMM_DEREGISTERED_INIT, "DEREGISTERED (INIT)" }, - { 0, NULL } -}; - -static char *gtp_ntoa(struct ul16_t *ul) -{ - if (ul->l == 4) { - struct in_addr *ia = (struct in_addr *) ul; - return inet_ntoa(*ia); - } else { - return "UNKNOWN"; - } -} - -static void vty_dump_pdp(struct vty *vty, const char *pfx, - struct sgsn_pdp_ctx *pdp) -{ - const char *imsi = pdp->mm ? pdp->mm->imsi : "(detaching)"; - vty_out(vty, "%sPDP Context IMSI: %s, SAPI: %u, NSAPI: %u, TI: %u%s", - pfx, imsi, pdp->sapi, pdp->nsapi, pdp->ti, VTY_NEWLINE); - if (pdp->lib) { - vty_out(vty, "%s APN: %s%s", pfx, - gprs_apn2str(pdp->lib->apn_use.v, pdp->lib->apn_use.l), - VTY_NEWLINE); - vty_out(vty, "%s PDP Address: %s%s", pfx, - gprs_pdpaddr2str(pdp->lib->eua.v, pdp->lib->eua.l), - VTY_NEWLINE); - vty_out(vty, "%s GTP Local Control(%s / TEIC: 0x%08x) ", pfx, - gtp_ntoa(&pdp->lib->gsnlc), pdp->lib->teic_own); - vty_out(vty, "Data(%s / TEID: 0x%08x)%s", - gtp_ntoa(&pdp->lib->gsnlu), pdp->lib->teid_own, VTY_NEWLINE); - vty_out(vty, "%s GTP Remote Control(%s / TEIC: 0x%08x) ", pfx, - gtp_ntoa(&pdp->lib->gsnrc), pdp->lib->teic_gn); - vty_out(vty, "Data(%s / TEID: 0x%08x)%s", - gtp_ntoa(&pdp->lib->gsnru), pdp->lib->teid_gn, VTY_NEWLINE); - } - - vty_out_rate_ctr_group(vty, " ", pdp->ctrg); -} - -static void vty_dump_mmctx(struct vty *vty, const char *pfx, - struct sgsn_mm_ctx *mm, int pdp) -{ - vty_out(vty, "%sMM Context for IMSI %s, IMEI %s, P-TMSI %08x%s", - pfx, mm->imsi, mm->imei, mm->p_tmsi, VTY_NEWLINE); - vty_out(vty, "%s MSISDN: %s, TLLI: %08x%s HLR: %s", - pfx, mm->msisdn, mm->gb.tlli, mm->hlr, VTY_NEWLINE); - vty_out(vty, "%s MM State: %s, Routeing Area: %u-%u-%u-%u, " - "Cell ID: %u%s", pfx, - get_value_string(gprs_mm_st_strs, mm->gmm_state), - mm->ra.mcc, mm->ra.mnc, mm->ra.lac, mm->ra.rac, - mm->gb.cell_id, VTY_NEWLINE); - - vty_out_rate_ctr_group(vty, " ", mm->ctrg); - - if (pdp) { - struct sgsn_pdp_ctx *pdp; - - llist_for_each_entry(pdp, &mm->pdp_list, list) - vty_dump_pdp(vty, " ", pdp); - } -} - -DEFUN(show_sgsn, show_sgsn_cmd, "show sgsn", - SHOW_STR "Display information about the SGSN") -{ - if (sgsn->gsup_client) { - struct ipa_client_conn *link = sgsn->gsup_client->link; - vty_out(vty, - " Remote authorization: %sconnected to %s:%d via GSUP%s", - sgsn->gsup_client->is_connected ? "" : "not ", - link->addr, link->port, - VTY_NEWLINE); - } - /* FIXME: statistics */ - return CMD_SUCCESS; -} - -#define MMCTX_STR "MM Context\n" -#define INCLUDE_PDP_STR "Include PDP Context Information\n" - -#if 0 -DEFUN(show_mmctx_tlli, show_mmctx_tlli_cmd, - "show mm-context tlli HEX [pdp]", - SHOW_STR MMCTX_STR "Identify by TLLI\n" "TLLI\n" INCLUDE_PDP_STR) -{ - uint32_t tlli; - struct sgsn_mm_ctx *mm; - - tlli = strtoul(argv[0], NULL, 16); - mm = sgsn_mm_ctx_by_tlli(tlli); - if (!mm) { - vty_out(vty, "No MM context for TLLI %08x%s", - tlli, VTY_NEWLINE); - return CMD_WARNING; - } - vty_dump_mmctx(vty, "", mm, argv[1] ? 1 : 0); - return CMD_SUCCESS; -} -#endif - -DEFUN(swow_mmctx_imsi, show_mmctx_imsi_cmd, - "show mm-context imsi IMSI [pdp]", - SHOW_STR MMCTX_STR "Identify by IMSI\n" "IMSI of the MM Context\n" - INCLUDE_PDP_STR) -{ - struct sgsn_mm_ctx *mm; - - mm = sgsn_mm_ctx_by_imsi(argv[0]); - if (!mm) { - vty_out(vty, "No MM context for IMSI %s%s", - argv[0], VTY_NEWLINE); - return CMD_WARNING; - } - vty_dump_mmctx(vty, "", mm, argv[1] ? 1 : 0); - return CMD_SUCCESS; -} - -DEFUN(swow_mmctx_all, show_mmctx_all_cmd, - "show mm-context all [pdp]", - SHOW_STR MMCTX_STR "All MM Contexts\n" INCLUDE_PDP_STR) -{ - struct sgsn_mm_ctx *mm; - - llist_for_each_entry(mm, &sgsn_mm_ctxts, list) - vty_dump_mmctx(vty, "", mm, argv[0] ? 1 : 0); - - return CMD_SUCCESS; -} - -DEFUN(show_pdpctx_all, show_pdpctx_all_cmd, - "show pdp-context all", - SHOW_STR "Display information on PDP Context\n" "Show everything\n") -{ - struct sgsn_pdp_ctx *pdp; - - llist_for_each_entry(pdp, &sgsn_pdp_ctxts, g_list) - vty_dump_pdp(vty, "", pdp); - - return CMD_SUCCESS; -} - - -DEFUN(imsi_acl, cfg_imsi_acl_cmd, - "imsi-acl (add|del) IMSI", - "Access Control List of foreign IMSIs\n" - "Add IMSI to ACL\n" - "Remove IMSI from ACL\n" - "IMSI of subscriber\n") -{ - char imsi_sanitized[GSM23003_IMSI_MAX_DIGITS+1]; - const char *op = argv[0]; - const char *imsi = imsi_sanitized; - int rc; - - /* Sanitize IMSI */ - if (strlen(argv[1]) > GSM23003_IMSI_MAX_DIGITS) { - vty_out(vty, "%% IMSI (%s) too long -- ignored!%s", - argv[1], VTY_NEWLINE); - return CMD_WARNING; - } - memset(imsi_sanitized, '0', sizeof(imsi_sanitized)); - strcpy(imsi_sanitized+GSM23003_IMSI_MAX_DIGITS-strlen(argv[1]),argv[1]); - - if (!strcmp(op, "add")) - rc = sgsn_acl_add(imsi, g_cfg); - else - rc = sgsn_acl_del(imsi, g_cfg); - - if (rc < 0) { - vty_out(vty, "%% unable to %s ACL%s", op, VTY_NEWLINE); - return CMD_WARNING; - } - - return CMD_SUCCESS; -} - -DEFUN(cfg_encrypt, cfg_encrypt_cmd, - "encryption (GEA0|GEA1|GEA2|GEA3|GEA4)", - "Set encryption algorithm for SGSN\n" - "Use GEA0 (no encryption)\n" - "Use GEA1\nUse GEA2\nUse GEA3\nUse GEA4\n") -{ - enum gprs_ciph_algo c = get_string_value(gprs_cipher_names, argv[0]); - if (c != GPRS_ALGO_GEA0) { - if (!gprs_cipher_supported(c)) { - vty_out(vty, "%% cipher %s is unsupported in current version%s", argv[0], VTY_NEWLINE); - return CMD_WARNING; - } - - if (!g_cfg->require_authentication) { - vty_out(vty, "%% unable to use encryption %s without authentication: please adjust auth-policy%s", - argv[0], VTY_NEWLINE); - return CMD_WARNING; - } - } - - g_cfg->cipher = c; - - return CMD_SUCCESS; -} - -DEFUN(cfg_auth_policy, cfg_auth_policy_cmd, - "auth-policy (accept-all|closed|acl-only|remote)", - "Autorization Policy of SGSN\n" - "Accept all IMSIs (DANGEROUS)\n" - "Accept only home network subscribers or those in the ACL\n" - "Accept only subscribers in the ACL\n" - "Use remote subscription data only (HLR)\n") -{ - int val = get_string_value(sgsn_auth_pol_strs, argv[0]); - OSMO_ASSERT(val >= SGSN_AUTH_POLICY_OPEN && val <= SGSN_AUTH_POLICY_REMOTE); - g_cfg->auth_policy = val; - g_cfg->require_authentication = (val == SGSN_AUTH_POLICY_REMOTE); - g_cfg->require_update_location = (val == SGSN_AUTH_POLICY_REMOTE); - - return CMD_SUCCESS; -} - -/* Subscriber */ -#include <openbsc/gprs_subscriber.h> - -static void subscr_dump_full_vty(struct vty *vty, struct gprs_subscr *gsub, int pending) -{ -#if 0 - char expire_time[200]; -#endif - struct gsm_auth_tuple *at; - int at_idx; - struct sgsn_subscriber_pdp_data *pdp; - - vty_out(vty, " Authorized: %d%s", - gsub->authorized, VTY_NEWLINE); - vty_out(vty, " LAC: %d/0x%x%s", - gsub->lac, gsub->lac, VTY_NEWLINE); - vty_out(vty, " IMSI: %s%s", gsub->imsi, VTY_NEWLINE); - if (gsub->tmsi != GSM_RESERVED_TMSI) - vty_out(vty, " TMSI: %08X%s", gsub->tmsi, - VTY_NEWLINE); - if (gsub->sgsn_data->msisdn_len > 0) - vty_out(vty, " MSISDN (BCD): %s%s", - osmo_hexdump(gsub->sgsn_data->msisdn, - gsub->sgsn_data->msisdn_len), - VTY_NEWLINE); - - if (strlen(gsub->imei) > 0) - vty_out(vty, " IMEI: %s%s", gsub->imei, VTY_NEWLINE); - - for (at_idx = 0; at_idx < ARRAY_SIZE(gsub->sgsn_data->auth_triplets); - at_idx++) { - at = &gsub->sgsn_data->auth_triplets[at_idx]; - if (at->key_seq == GSM_KEY_SEQ_INVAL) - continue; - - vty_out(vty, " A3A8 tuple (used %d times): ", - at->use_count); - vty_out(vty, " CKSN: %d, ", - at->key_seq); - if (at->vec.auth_types & OSMO_AUTH_TYPE_GSM) { - vty_out(vty, "RAND: %s, ", - osmo_hexdump(at->vec.rand, - sizeof(at->vec.rand))); - vty_out(vty, "SRES: %s, ", - osmo_hexdump(at->vec.sres, - sizeof(at->vec.sres))); - vty_out(vty, "Kc: %s%s", - osmo_hexdump(at->vec.kc, - sizeof(at->vec.kc)), VTY_NEWLINE); - } - if (at->vec.auth_types & OSMO_AUTH_TYPE_UMTS) { - vty_out(vty, " AUTN: %s, ", - osmo_hexdump(at->vec.autn, - sizeof(at->vec.autn))); - vty_out(vty, "RES: %s, ", - osmo_hexdump(at->vec.res, at->vec.res_len)); - vty_out(vty, "IK: %s, ", - osmo_hexdump(at->vec.ik, sizeof(at->vec.ik))); - vty_out(vty, "CK: %s, ", - osmo_hexdump(at->vec.ck, sizeof(at->vec.ck))); - } - } - - llist_for_each_entry(pdp, &gsub->sgsn_data->pdp_list, list) { - vty_out(vty, " PDP info: Id: %d, Type: 0x%04x, APN: '%s' QoS: %s%s", - pdp->context_id, pdp->pdp_type, pdp->apn_str, - osmo_hexdump(pdp->qos_subscribed, pdp->qos_subscribed_len), - VTY_NEWLINE); - } - -#if 0 - /* print the expiration time of a subscriber */ - if (gsub->expire_lu) { - strftime(expire_time, sizeof(expire_time), - "%a, %d %b %Y %T %z", localtime(&gsub->expire_lu)); - expire_time[sizeof(expire_time) - 1] = '\0'; - vty_out(vty, " Expiration Time: %s%s", expire_time, VTY_NEWLINE); - } -#endif - - if (gsub->flags) - vty_out(vty, " Flags: %s%s%s%s%s%s", - gsub->flags & GPRS_SUBSCRIBER_FIRST_CONTACT ? - "FIRST_CONTACT " : "", - gsub->flags & GPRS_SUBSCRIBER_CANCELLED ? - "CANCELLED " : "", - gsub->flags & GPRS_SUBSCRIBER_UPDATE_LOCATION_PENDING ? - "UPDATE_LOCATION_PENDING " : "", - gsub->flags & GPRS_SUBSCRIBER_UPDATE_AUTH_INFO_PENDING ? - "AUTH_INFO_PENDING " : "", - gsub->flags & GPRS_SUBSCRIBER_ENABLE_PURGE ? - "ENABLE_PURGE " : "", - VTY_NEWLINE); - - vty_out(vty, " Use count: %u%s", gsub->use_count, VTY_NEWLINE); -} - -DEFUN(show_subscr_cache, - show_subscr_cache_cmd, - "show subscriber cache", - SHOW_STR "Show information about subscribers\n" - "Display contents of subscriber cache\n") -{ - struct gprs_subscr *subscr; - - llist_for_each_entry(subscr, gprs_subscribers, entry) { - vty_out(vty, " Subscriber:%s", VTY_NEWLINE); - subscr_dump_full_vty(vty, subscr, 0); - } - - return CMD_SUCCESS; -} - -#define UPDATE_SUBSCR_STR "update-subscriber imsi IMSI " -#define UPDATE_SUBSCR_HELP "Update subscriber list\n" \ - "Use the IMSI to select the subscriber\n" \ - "The IMSI\n" - -#define UPDATE_SUBSCR_INSERT_HELP "Insert data into the subscriber record\n" - -DEFUN(update_subscr_insert_auth_triplet, update_subscr_insert_auth_triplet_cmd, - UPDATE_SUBSCR_STR "insert auth-triplet <1-5> sres SRES rand RAND kc KC", - UPDATE_SUBSCR_HELP - UPDATE_SUBSCR_INSERT_HELP - "Update authentication triplet\n" - "Triplet index\n" - "Set SRES value\nSRES value (4 byte) in hex\n" - "Set RAND value\nRAND value (16 byte) in hex\n" - "Set Kc value\nKc value (8 byte) in hex\n") -{ - const char *imsi = argv[0]; - const int cksn = atoi(argv[1]) - 1; - const char *sres_str = argv[2]; - const char *rand_str = argv[3]; - const char *kc_str = argv[4]; - struct gsm_auth_tuple at = {0,}; - - struct gprs_subscr *subscr; - - subscr = gprs_subscr_get_by_imsi(imsi); - if (!subscr) { - vty_out(vty, "%% unable get subscriber record for %s%s", - imsi, VTY_NEWLINE); - return CMD_WARNING; - } - - OSMO_ASSERT(subscr->sgsn_data); - - if (osmo_hexparse(sres_str, &at.vec.sres[0], sizeof(at.vec.sres)) < 0) { - vty_out(vty, "%% invalid SRES value '%s'%s", - sres_str, VTY_NEWLINE); - goto failed; - } - if (osmo_hexparse(rand_str, &at.vec.rand[0], sizeof(at.vec.rand)) < 0) { - vty_out(vty, "%% invalid RAND value '%s'%s", - rand_str, VTY_NEWLINE); - goto failed; - } - if (osmo_hexparse(kc_str, &at.vec.kc[0], sizeof(at.vec.kc)) < 0) { - vty_out(vty, "%% invalid Kc value '%s'%s", - kc_str, VTY_NEWLINE); - goto failed; - } - at.key_seq = cksn; - - subscr->sgsn_data->auth_triplets[cksn] = at; - subscr->sgsn_data->auth_triplets_updated = 1; - - gprs_subscr_put(subscr); - - return CMD_SUCCESS; - -failed: - gprs_subscr_put(subscr); - return CMD_SUCCESS; -} - -DEFUN(update_subscr_cancel, update_subscr_cancel_cmd, - UPDATE_SUBSCR_STR "cancel (update-procedure|subscription-withdraw)", - UPDATE_SUBSCR_HELP - "Cancel (remove) subscriber record\n" - "The MS moved to another SGSN\n" - "The subscription is no longer valid\n") -{ - const char *imsi = argv[0]; - const char *cancel_type = argv[1]; - - struct gprs_subscr *subscr; - - subscr = gprs_subscr_get_by_imsi(imsi); - if (!subscr) { - vty_out(vty, "%% no subscriber record for %s%s", - imsi, VTY_NEWLINE); - return CMD_WARNING; - } - - if (strcmp(cancel_type, "update-procedure") == 0) - subscr->sgsn_data->error_cause = SGSN_ERROR_CAUSE_NONE; - else - subscr->sgsn_data->error_cause = GMM_CAUSE_IMPL_DETACHED; - - gprs_subscr_cancel(subscr); - gprs_subscr_put(subscr); - - return CMD_SUCCESS; -} - -DEFUN(update_subscr_create, update_subscr_create_cmd, - UPDATE_SUBSCR_STR "create", - UPDATE_SUBSCR_HELP - "Create a subscriber entry\n") -{ - const char *imsi = argv[0]; - - struct gprs_subscr *subscr; - - subscr = gprs_subscr_get_by_imsi(imsi); - if (subscr) { - vty_out(vty, "%% subscriber record already exists for %s%s", - imsi, VTY_NEWLINE); - return CMD_WARNING; - } - - subscr = gprs_subscr_get_or_create(imsi); - subscr->keep_in_ram = 1; - gprs_subscr_put(subscr); - - return CMD_SUCCESS; -} - -DEFUN(update_subscr_destroy, update_subscr_destroy_cmd, - UPDATE_SUBSCR_STR "destroy", - UPDATE_SUBSCR_HELP - "Destroy a subscriber entry\n") -{ - const char *imsi = argv[0]; - - struct gprs_subscr *subscr; - - subscr = gprs_subscr_get_by_imsi(imsi); - if (!subscr) { - vty_out(vty, "%% subscriber record does not exist for %s%s", - imsi, VTY_NEWLINE); - return CMD_WARNING; - } - - subscr->keep_in_ram = 0; - subscr->sgsn_data->error_cause = SGSN_ERROR_CAUSE_NONE; - gprs_subscr_cancel(subscr); - if (subscr->use_count > 1) - vty_out(vty, "%% subscriber is still in use%s", - VTY_NEWLINE); - gprs_subscr_put(subscr); - - return CMD_SUCCESS; -} - -#define UL_ERR_STR "system-failure|data-missing|unexpected-data-value|" \ - "unknown-subscriber|roaming-not-allowed" - -#define UL_ERR_HELP \ - "Force error code SystemFailure\n" \ - "Force error code DataMissing\n" \ - "Force error code UnexpectedDataValue\n" \ - "Force error code UnknownSubscriber\n" \ - "Force error code RoamingNotAllowed\n" - -DEFUN(update_subscr_update_location_result, update_subscr_update_location_result_cmd, - UPDATE_SUBSCR_STR "update-location-result (ok|" UL_ERR_STR ")", - UPDATE_SUBSCR_HELP - "Complete the update location procedure\n" - "The update location request succeeded\n" - UL_ERR_HELP) -{ - const char *imsi = argv[0]; - const char *ret_code_str = argv[1]; - - struct gprs_subscr *subscr; - - const struct value_string cause_mapping[] = { - { GMM_CAUSE_NET_FAIL, "system-failure" }, - { GMM_CAUSE_INV_MAND_INFO, "data-missing" }, - { GMM_CAUSE_PROTO_ERR_UNSPEC, "unexpected-data-value" }, - { GMM_CAUSE_IMSI_UNKNOWN, "unknown-subscriber" }, - { GMM_CAUSE_GPRS_NOTALLOWED, "roaming-not-allowed" }, - { 0, NULL } - }; - - subscr = gprs_subscr_get_by_imsi(imsi); - if (!subscr) { - vty_out(vty, "%% unable to get subscriber record for %s%s", - imsi, VTY_NEWLINE); - return CMD_WARNING; - } - - if (strcmp(ret_code_str, "ok") == 0) { - subscr->sgsn_data->error_cause = SGSN_ERROR_CAUSE_NONE; - subscr->authorized = 1; - } else { - subscr->sgsn_data->error_cause = - get_string_value(cause_mapping, ret_code_str); - subscr->authorized = 0; - } - - gprs_subscr_update(subscr); - - gprs_subscr_put(subscr); - - return CMD_SUCCESS; -} - -DEFUN(update_subscr_update_auth_info, update_subscr_update_auth_info_cmd, - UPDATE_SUBSCR_STR "update-auth-info", - UPDATE_SUBSCR_HELP - "Complete the send authentication info procedure\n") -{ - const char *imsi = argv[0]; - - struct gprs_subscr *subscr; - - subscr = gprs_subscr_get_by_imsi(imsi); - if (!subscr) { - vty_out(vty, "%% unable to get subscriber record for %s%s", - imsi, VTY_NEWLINE); - return CMD_WARNING; - } - - gprs_subscr_update_auth_info(subscr); - - gprs_subscr_put(subscr); - - return CMD_SUCCESS; -} - -DEFUN(cfg_gsup_remote_ip, cfg_gsup_remote_ip_cmd, - "gsup remote-ip A.B.C.D", - "GSUP Parameters\n" - "Set the IP address of the remote GSUP server\n" - "IPv4 Address\n") -{ - inet_aton(argv[0], &g_cfg->gsup_server_addr.sin_addr); - - return CMD_SUCCESS; -} - -DEFUN(cfg_gsup_remote_port, cfg_gsup_remote_port_cmd, - "gsup remote-port <0-65535>", - "GSUP Parameters\n" - "Set the TCP port of the remote GSUP server\n" - "Remote TCP port\n") -{ - g_cfg->gsup_server_port = atoi(argv[0]); - - return CMD_SUCCESS; -} - -DEFUN(cfg_gsup_oap_id, cfg_gsup_oap_id_cmd, - "gsup oap-id <0-65535>", - "GSUP Parameters\n" - "Set the SGSN's OAP client ID\nOAP client ID (0 == disabled)\n") -{ - /* VTY ensures range */ - g_cfg->oap.client_id = (uint16_t)atoi(argv[0]); - return CMD_SUCCESS; -} - -DEFUN(cfg_gsup_oap_k, cfg_gsup_oap_k_cmd, - "gsup oap-k K", - "GSUP Parameters\n" - "Set the OAP shared secret K\nK value (16 byte) hex\n") -{ - const char *k = argv[0]; - - g_cfg->oap.secret_k_present = 0; - - if ((!k) || (strlen(k) == 0)) - goto disable; - - int k_len = osmo_hexparse(k, - g_cfg->oap.secret_k, - sizeof(g_cfg->oap.secret_k)); - if (k_len != 16) { - vty_out(vty, "%% need exactly 16 octets for oap-k, got %d.%s", - k_len, VTY_NEWLINE); - goto disable; - } - - g_cfg->oap.secret_k_present = 1; - return CMD_SUCCESS; - -disable: - if (g_cfg->oap.client_id > 0) { - vty_out(vty, "%% OAP client ID set, but invalid oap-k value disables OAP.%s", - VTY_NEWLINE); - return CMD_WARNING; - } - return CMD_SUCCESS; -} - -DEFUN(cfg_gsup_oap_opc, cfg_gsup_oap_opc_cmd, - "gsup oap-opc OPC", - "GSUP Parameters\n" - "Set the OAP shared secret OPC\nOPC value (16 byte) hex\n") -{ - const char *opc = argv[0]; - - g_cfg->oap.secret_opc_present = 0; - - if ((!opc) || (strlen(opc) == 0)) - goto disable; - - int opc_len = osmo_hexparse(opc, - g_cfg->oap.secret_opc, - sizeof(g_cfg->oap.secret_opc)); - if (opc_len != 16) { - vty_out(vty, "%% need exactly 16 octets for oap-opc, got %d.%s", - opc_len, VTY_NEWLINE); - goto disable; - } - - g_cfg->oap.secret_opc_present = 1; - return CMD_SUCCESS; - -disable: - if (g_cfg->oap.client_id > 0) { - vty_out(vty, "%% OAP client ID set, but invalid oap-opc value disables OAP.%s", - VTY_NEWLINE); - return CMD_WARNING; - } - return CMD_SUCCESS; -} - -DEFUN(cfg_apn_name, cfg_apn_name_cmd, - "access-point-name NAME", - "Configure a global list of allowed APNs\n" - "Add this NAME to the list\n") -{ - return add_apn_ggsn_mapping(vty, argv[0], "", 0); -} - -DEFUN(cfg_no_apn_name, cfg_no_apn_name_cmd, - "no access-point-name NAME", - NO_STR "Configure a global list of allowed APNs\n" - "Remove entry with NAME\n") -{ - struct apn_ctx *apn_ctx = sgsn_apn_ctx_by_name(argv[0], ""); - if (!apn_ctx) - return CMD_SUCCESS; - - sgsn_apn_ctx_free(apn_ctx); - return CMD_SUCCESS; -} - -DEFUN(cfg_cdr_filename, cfg_cdr_filename_cmd, - "cdr filename NAME", - "CDR\nSet filename\nname\n") -{ - talloc_free(g_cfg->cdr.filename); - g_cfg->cdr.filename = talloc_strdup(tall_vty_ctx, argv[0]); - return CMD_SUCCESS; -} - -DEFUN(cfg_no_cdr_filename, cfg_no_cdr_filename_cmd, - "no cdr filename", - NO_STR "CDR\nDisable CDR generation\n") -{ - talloc_free(g_cfg->cdr.filename); - g_cfg->cdr.filename = NULL; - return CMD_SUCCESS; -} - -DEFUN(cfg_cdr_interval, cfg_cdr_interval_cmd, - "cdr interval <1-2147483647>", - "CDR\nPDP periodic log interval\nSeconds\n") -{ - g_cfg->cdr.interval = atoi(argv[0]); - return CMD_SUCCESS; -} - -#define COMPRESSION_STR "Configure compression\n" -DEFUN(cfg_no_comp_rfc1144, cfg_no_comp_rfc1144_cmd, - "no compression rfc1144", - NO_STR COMPRESSION_STR "disable rfc1144 TCP/IP header compression\n") -{ - g_cfg->pcomp_rfc1144.active = 0; - g_cfg->pcomp_rfc1144.passive = 0; - return CMD_SUCCESS; -} - -DEFUN(cfg_comp_rfc1144, cfg_comp_rfc1144_cmd, - "compression rfc1144 active slots <1-256>", - COMPRESSION_STR - "RFC1144 Header compresion scheme\n" - "Compression is actively proposed\n" - "Number of compression state slots\n" - "Number of compression state slots\n") -{ - g_cfg->pcomp_rfc1144.active = 1; - g_cfg->pcomp_rfc1144.passive = 1; - g_cfg->pcomp_rfc1144.s01 = atoi(argv[0]) - 1; - return CMD_SUCCESS; -} - -DEFUN(cfg_comp_rfc1144p, cfg_comp_rfc1144p_cmd, - "compression rfc1144 passive", - COMPRESSION_STR - "RFC1144 Header compresion scheme\n" - "Compression is available on request\n") -{ - g_cfg->pcomp_rfc1144.active = 0; - g_cfg->pcomp_rfc1144.passive = 1; - return CMD_SUCCESS; -} - -DEFUN(cfg_no_comp_v42bis, cfg_no_comp_v42bis_cmd, - "no compression v42bis", - NO_STR COMPRESSION_STR "disable V.42bis data compression\n") -{ - g_cfg->dcomp_v42bis.active = 0; - g_cfg->dcomp_v42bis.passive = 0; - return CMD_SUCCESS; -} - -DEFUN(cfg_comp_v42bis, cfg_comp_v42bis_cmd, - "compression v42bis active direction (ms|sgsn|both) codewords <512-65535> strlen <6-250>", - COMPRESSION_STR - "V.42bis data compresion scheme\n" - "Compression is actively proposed\n" - "Direction in which the compression shall be active (p0)\n" - "Compress ms->sgsn direction only\n" - "Compress sgsn->ms direction only\n" - "Both directions\n" - "Number of codewords (p1)\n" - "Number of codewords\n" - "Maximum string length (p2)\n" "Maximum string length\n") -{ - g_cfg->dcomp_v42bis.active = 1; - g_cfg->dcomp_v42bis.passive = 1; - - switch (argv[0][0]) { - case 'm': - g_cfg->dcomp_v42bis.p0 = 1; - break; - case 's': - g_cfg->dcomp_v42bis.p0 = 2; - break; - case 'b': - g_cfg->dcomp_v42bis.p0 = 3; - break; - } - - g_cfg->dcomp_v42bis.p1 = atoi(argv[1]); - g_cfg->dcomp_v42bis.p2 = atoi(argv[2]); - return CMD_SUCCESS; -} - -DEFUN(cfg_comp_v42bisp, cfg_comp_v42bisp_cmd, - "compression v42bis passive", - COMPRESSION_STR - "V.42bis data compresion scheme\n" - "Compression is available on request\n") -{ - g_cfg->dcomp_v42bis.active = 0; - g_cfg->dcomp_v42bis.passive = 1; - return CMD_SUCCESS; -} - -int sgsn_vty_init(void) -{ - install_element_ve(&show_sgsn_cmd); - //install_element_ve(&show_mmctx_tlli_cmd); - install_element_ve(&show_mmctx_imsi_cmd); - install_element_ve(&show_mmctx_all_cmd); - install_element_ve(&show_pdpctx_all_cmd); - install_element_ve(&show_subscr_cache_cmd); - - install_element(ENABLE_NODE, &update_subscr_insert_auth_triplet_cmd); - install_element(ENABLE_NODE, &update_subscr_create_cmd); - install_element(ENABLE_NODE, &update_subscr_destroy_cmd); - install_element(ENABLE_NODE, &update_subscr_cancel_cmd); - install_element(ENABLE_NODE, &update_subscr_update_location_result_cmd); - install_element(ENABLE_NODE, &update_subscr_update_auth_info_cmd); - - install_element(CONFIG_NODE, &cfg_sgsn_cmd); - install_node(&sgsn_node, config_write_sgsn); - vty_install_default(SGSN_NODE); - install_element(SGSN_NODE, &cfg_sgsn_bind_addr_cmd); - install_element(SGSN_NODE, &cfg_ggsn_remote_ip_cmd); - //install_element(SGSN_NODE, &cfg_ggsn_remote_port_cmd); - install_element(SGSN_NODE, &cfg_ggsn_gtp_version_cmd); - install_element(SGSN_NODE, &cfg_imsi_acl_cmd); - install_element(SGSN_NODE, &cfg_auth_policy_cmd); - install_element(SGSN_NODE, &cfg_encrypt_cmd); - install_element(SGSN_NODE, &cfg_gsup_remote_ip_cmd); - install_element(SGSN_NODE, &cfg_gsup_remote_port_cmd); - install_element(SGSN_NODE, &cfg_gsup_oap_id_cmd); - install_element(SGSN_NODE, &cfg_gsup_oap_k_cmd); - install_element(SGSN_NODE, &cfg_gsup_oap_opc_cmd); - install_element(SGSN_NODE, &cfg_apn_ggsn_cmd); - install_element(SGSN_NODE, &cfg_apn_imsi_ggsn_cmd); - install_element(SGSN_NODE, &cfg_apn_name_cmd); - install_element(SGSN_NODE, &cfg_no_apn_name_cmd); - install_element(SGSN_NODE, &cfg_cdr_filename_cmd); - install_element(SGSN_NODE, &cfg_no_cdr_filename_cmd); - install_element(SGSN_NODE, &cfg_cdr_interval_cmd); - install_element(SGSN_NODE, &cfg_ggsn_dynamic_lookup_cmd); - install_element(SGSN_NODE, &cfg_grx_ggsn_cmd); - - install_element(SGSN_NODE, &cfg_sgsn_T3312_cmd); - install_element(SGSN_NODE, &cfg_sgsn_T3322_cmd); - install_element(SGSN_NODE, &cfg_sgsn_T3350_cmd); - install_element(SGSN_NODE, &cfg_sgsn_T3360_cmd); - install_element(SGSN_NODE, &cfg_sgsn_T3370_cmd); - install_element(SGSN_NODE, &cfg_sgsn_T3313_cmd); - install_element(SGSN_NODE, &cfg_sgsn_T3314_cmd); - install_element(SGSN_NODE, &cfg_sgsn_T3316_cmd); - install_element(SGSN_NODE, &cfg_sgsn_T3385_cmd); - install_element(SGSN_NODE, &cfg_sgsn_T3386_cmd); - install_element(SGSN_NODE, &cfg_sgsn_T3395_cmd); - install_element(SGSN_NODE, &cfg_sgsn_T3397_cmd); - - install_element(SGSN_NODE, &cfg_no_comp_rfc1144_cmd); - install_element(SGSN_NODE, &cfg_comp_rfc1144_cmd); - install_element(SGSN_NODE, &cfg_comp_rfc1144p_cmd); - install_element(SGSN_NODE, &cfg_no_comp_v42bis_cmd); - install_element(SGSN_NODE, &cfg_comp_v42bis_cmd); - install_element(SGSN_NODE, &cfg_comp_v42bisp_cmd); - return 0; -} - -int sgsn_parse_config(const char *config_file, struct sgsn_config *cfg) -{ - int rc; - - g_cfg = cfg; - - g_cfg->timers.T3312 = GSM0408_T3312_SECS; - g_cfg->timers.T3322 = GSM0408_T3322_SECS; - g_cfg->timers.T3350 = GSM0408_T3350_SECS; - g_cfg->timers.T3360 = GSM0408_T3360_SECS; - g_cfg->timers.T3370 = GSM0408_T3370_SECS; - g_cfg->timers.T3313 = GSM0408_T3313_SECS; - g_cfg->timers.T3314 = GSM0408_T3314_SECS; - g_cfg->timers.T3316 = GSM0408_T3316_SECS; - g_cfg->timers.T3385 = GSM0408_T3385_SECS; - g_cfg->timers.T3386 = GSM0408_T3386_SECS; - g_cfg->timers.T3395 = GSM0408_T3395_SECS; - g_cfg->timers.T3397 = GSM0408_T3397_SECS; - - rc = vty_read_config_file(config_file, NULL); - if (rc < 0) { - fprintf(stderr, "Failed to parse the config file: '%s'\n", config_file); - return rc; - } - - if (g_cfg->auth_policy == SGSN_AUTH_POLICY_REMOTE - && !(g_cfg->gsup_server_addr.sin_addr.s_addr - && g_cfg->gsup_server_port)) { - fprintf(stderr, "Configuration error:" - " 'auth-policy remote' requires both" - " 'gsup remote-ip' and 'gsup remote-port'\n"); - return -EINVAL; - } - - return 0; -} diff --git a/openbsc/src/gprs/slhc.c b/openbsc/src/gprs/slhc.c deleted file mode 100644 index cbdf8dbd8..000000000 --- a/openbsc/src/gprs/slhc.c +++ /dev/null @@ -1,813 +0,0 @@ -/* - * Routines to compress and uncompress tcp packets (for transmission - * over low speed serial lines). - * - * Copyright (c) 1989 Regents of the University of California. - * All rights reserved. - * - * Redistribution and use in source and binary forms are permitted - * provided that the above copyright notice and this paragraph are - * duplicated in all such forms and that any documentation, - * advertising materials, and other materials related to such - * distribution and use acknowledge that the software was developed - * by the University of California, Berkeley. The name of the - * University may not be used to endorse or promote products derived - * from this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - * - * Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989: - * - Initial distribution. - * - * - * modified for KA9Q Internet Software Package by - * Katie Stevens (dkstevens@ucdavis.edu) - * University of California, Davis - * Computing Services - * - 01-31-90 initial adaptation (from 1.19) - * PPP.05 02-15-90 [ks] - * PPP.08 05-02-90 [ks] use PPP protocol field to signal compression - * PPP.15 09-90 [ks] improve mbuf handling - * PPP.16 11-02 [karn] substantially rewritten to use NOS facilities - * - * - Feb 1991 Bill_Simpson@um.cc.umich.edu - * variable number of conversation slots - * allow zero or one slots - * separate routines - * status display - * - Jul 1994 Dmitry Gorodchanin - * Fixes for memory leaks. - * - Oct 1994 Dmitry Gorodchanin - * Modularization. - * - Jan 1995 Bjorn Ekwall - * Use ip_fast_csum from ip.h - * - July 1995 Christos A. Polyzols - * Spotted bug in tcp option checking - * - * - * This module is a difficult issue. It's clearly inet code but it's also clearly - * driver code belonging close to PPP and SLIP - */ - -#include <string.h> -#include <stdio.h> -#include <errno.h> -#include <stdint.h> -#include <arpa/inet.h> -#include <osmocom/core/utils.h> -#include <osmocom/core/talloc.h> -#include <openbsc/slhc.h> -#include <openbsc/debug.h> - -#define ERR_PTR(x) x - - -static unsigned char *encode(unsigned char *cp, unsigned short n); -static long decode(unsigned char **cpp); -static unsigned char * put16(unsigned char *cp, unsigned short x); -static unsigned short pull16(unsigned char **cpp); - -/* Replacement for kernel space function ip_fast_csum() */ -static uint16_t ip_fast_csum(uint8_t *iph, int ihl) -{ - int i; - uint16_t temp; - uint32_t accumulator = 0xFFFF; - - for(i=0;i<ihl*2;i++) - { - temp = ((*iph) << 8)&0xFF00; - iph++; - temp |= (*iph)&0xFF; - iph++; - - accumulator+=temp; - if(accumulator>0xFFFF) - { - accumulator++; - accumulator&=0xFFFF; - } - } - - return (uint16_t)(htons(~accumulator)&0xFFFF); -} - -/* Replacement for kernel space function put_unaligned() */ -static void put_unaligned(uint16_t val, void *ptr) -{ - memcpy(ptr,&val,sizeof(val)); -} - - -/* Allocate compression data structure - * slots must be in range 0 to 255 (zero meaning no compression) - * Returns pointer to structure or ERR_PTR() on error. - */ -struct slcompress * -slhc_init(const void *ctx, int rslots, int tslots) -{ - register short i; - register struct cstate *ts; - struct slcompress *comp; - - if (rslots < 0 || rslots > 255 || tslots < 0 || tslots > 255) - return NULL; - - comp = (struct slcompress *)talloc_zero_size(ctx,sizeof(struct slcompress)); - if (! comp) - goto out_fail; - - if (rslots > 0) { - size_t rsize = rslots * sizeof(struct cstate); - comp->rstate = (struct cstate *) talloc_zero_size(ctx, rsize); - if (! comp->rstate) - goto out_free; - comp->rslot_limit = rslots - 1; - } - - if (tslots > 0) { - size_t tsize = tslots * sizeof(struct cstate); - comp->tstate = (struct cstate *) talloc_zero_size(ctx, tsize); - if (! comp->tstate) - goto out_free2; - comp->tslot_limit = tslots - 1; - } - - comp->xmit_oldest = 0; - comp->xmit_current = 255; - comp->recv_current = 255; - /* - * don't accept any packets with implicit index until we get - * one with an explicit index. Otherwise the uncompress code - * will try to use connection 255, which is almost certainly - * out of range - */ - comp->flags |= SLF_TOSS; - - if ( tslots > 0 ) { - ts = comp->tstate; - for(i = comp->tslot_limit; i > 0; --i){ - ts[i].cs_this = i; - ts[i].next = &(ts[i - 1]); - } - ts[0].next = &(ts[comp->tslot_limit]); - ts[0].cs_this = 0; - } - return comp; - -out_free2: - talloc_free(comp->rstate); -out_free: - talloc_free(comp); -out_fail: - return NULL; -} - - -/* Free a compression data structure */ -void -slhc_free(struct slcompress *comp) -{ - DEBUGP(DSLHC, "slhc_free(): Freeing compression states...\n"); - - if ( comp == NULLSLCOMPR ) - return; - - if ( comp->tstate != NULLSLSTATE ) - talloc_free(comp->tstate ); - - if ( comp->rstate != NULLSLSTATE ) - talloc_free( comp->rstate ); - - talloc_free( comp ); -} - - -/* Put a short in host order into a char array in network order */ -static inline unsigned char * -put16(unsigned char *cp, unsigned short x) -{ - *cp++ = x >> 8; - *cp++ = x; - - return cp; -} - - -/* Encode a number */ -static unsigned char * -encode(unsigned char *cp, unsigned short n) -{ - if(n >= 256 || n == 0){ - *cp++ = 0; - cp = put16(cp,n); - } else { - *cp++ = n; - } - - DEBUGP(DSLHC, "encode(): n=%04x\n",n); - return cp; -} - -/* Pull a 16-bit integer in host order from buffer in network byte order */ -static unsigned short -pull16(unsigned char **cpp) -{ - short rval; - - rval = *(*cpp)++; - rval <<= 8; - rval |= *(*cpp)++; - return rval; -} - -/* Decode a number */ -static long -decode(unsigned char **cpp) -{ - register int x; - - x = *(*cpp)++; - if(x == 0){ - return pull16(cpp) & 0xffff; /* pull16 returns -1 on error */ - } else { - return x & 0xff; /* -1 if PULLCHAR returned error */ - } -} - -/* - * icp and isize are the original packet. - * ocp is a place to put a copy if necessary. - * cpp is initially a pointer to icp. If the copy is used, - * change it to ocp. - */ - -int -slhc_compress(struct slcompress *comp, unsigned char *icp, int isize, - unsigned char *ocp, unsigned char **cpp, int compress_cid) -{ - register struct cstate *ocs = &(comp->tstate[comp->xmit_oldest]); - register struct cstate *lcs = ocs; - register struct cstate *cs = lcs->next; - register unsigned long deltaS, deltaA; - register short changes = 0; - int hlen; - unsigned char new_seq[16]; - register unsigned char *cp = new_seq; - struct iphdr *ip; - struct tcphdr *th, *oth; - __sum16 csum; - - - /* - * Don't play with runt packets. - */ - - if(isize<sizeof(struct iphdr)) - return isize; - - ip = (struct iphdr *) icp; - - /* Bail if this packet isn't TCP, or is an IP fragment */ - if (ip->protocol != IPPROTO_TCP || (ntohs(ip->frag_off) & 0x3fff)) { - /* Send as regular IP */ - if(ip->protocol != IPPROTO_TCP) - comp->sls_o_nontcp++; - else - comp->sls_o_tcp++; - DEBUGP(DSLHC, "slhc_compress(): Not a TCP packat, will not touch...\n"); - return isize; - } - /* Extract TCP header */ - - th = (struct tcphdr *)(((unsigned char *)ip) + ip->ihl*4); - hlen = ip->ihl*4 + th->doff*4; - - /* Bail if the TCP packet isn't `compressible' (i.e., ACK isn't set or - * some other control bit is set). Also uncompressible if - * it's a runt. - */ - if(hlen > isize || th->syn || th->fin || th->rst || - ! (th->ack)){ - /* TCP connection stuff; send as regular IP */ - comp->sls_o_tcp++; - DEBUGP(DSLHC, "slhc_compress(): Packet is part of a TCP connection, will not touch...\n"); - return isize; - } - /* - * Packet is compressible -- we're going to send either a - * COMPRESSED_TCP or UNCOMPRESSED_TCP packet. Either way, - * we need to locate (or create) the connection state. - * - * States are kept in a circularly linked list with - * xmit_oldest pointing to the end of the list. The - * list is kept in lru order by moving a state to the - * head of the list whenever it is referenced. Since - * the list is short and, empirically, the connection - * we want is almost always near the front, we locate - * states via linear search. If we don't find a state - * for the datagram, the oldest state is (re-)used. - */ - - DEBUGP(DSLHC, "slhc_compress(): Compressible packet detected!\n"); - - for ( ; ; ) { - if( ip->saddr == cs->cs_ip.saddr - && ip->daddr == cs->cs_ip.daddr - && th->source == cs->cs_tcp.source - && th->dest == cs->cs_tcp.dest) - goto found; - - /* if current equal oldest, at end of list */ - if ( cs == ocs ) - break; - lcs = cs; - cs = cs->next; - comp->sls_o_searches++; - } - /* - * Didn't find it -- re-use oldest cstate. Send an - * uncompressed packet that tells the other side what - * connection number we're using for this conversation. - * - * Note that since the state list is circular, the oldest - * state points to the newest and we only need to set - * xmit_oldest to update the lru linkage. - */ - - DEBUGP(DSLHC, "slhc_compress(): Header not yet seen, will memorize header for the next turn...\n"); - comp->sls_o_misses++; - comp->xmit_oldest = lcs->cs_this; - goto uncompressed; - -found: - DEBUGP(DSLHC, "slhc_compress(): Header already seen, trying to compress...\n"); - /* - * Found it -- move to the front on the connection list. - */ - if(lcs == ocs) { - /* found at most recently used */ - } else if (cs == ocs) { - /* found at least recently used */ - comp->xmit_oldest = lcs->cs_this; - } else { - /* more than 2 elements */ - lcs->next = cs->next; - cs->next = ocs->next; - ocs->next = cs; - } - - /* - * Make sure that only what we expect to change changed. - * Check the following: - * IP protocol version, header length & type of service. - * The "Don't fragment" bit. - * The time-to-live field. - * The TCP header length. - * IP options, if any. - * TCP options, if any. - * If any of these things are different between the previous & - * current datagram, we send the current datagram `uncompressed'. - */ - oth = &cs->cs_tcp; - - /* Display a little more debug information about which of the - * header fields changed unexpectedly */ - if(ip->version != cs->cs_ip.version) - DEBUGP(DSLHC, "slhc_compress(): Unexpected change: ip->version != cs->cs_ip.version\n"); - if(ip->ihl != cs->cs_ip.ihl) - DEBUGP(DSLHC, "slhc_compress(): Unexpected change: ip->ihl != cs->cs_ip.ihl\n"); - if(ip->tos != cs->cs_ip.tos) - DEBUGP(DSLHC, "slhc_compress(): Unexpected change: ip->tos != cs->cs_ip.tos\n"); - if((ip->frag_off & htons(0x4000)) != (cs->cs_ip.frag_off & htons(0x4000))) - DEBUGP(DSLHC, "slhc_compress(): Unexpected change: (ip->frag_off & htons(0x4000)) != (cs->cs_ip.frag_off & htons(0x4000))\n"); - if(ip->ttl != cs->cs_ip.ttl) - DEBUGP(DSLHC, "slhc_compress(): Unexpected change: ip->ttl != cs->cs_ip.ttl\n"); - if(th->doff != cs->cs_tcp.doff) - DEBUGP(DSLHC, "slhc_compress(): Unexpected change: th->doff != cs->cs_tcp.doff\n"); - if(ip->ihl > 5 && memcmp(ip+1,cs->cs_ipopt,((ip->ihl)-5)*4) != 0) { - DEBUGP(DSLHC, "slhc_compress(): Unexpected change: (ip->ihl > 5 && memcmp(ip+1,cs->cs_ipopt,((ip->ihl)-5)*4) != 0)\n"); - DEBUGP(DSLHC, "slhc_compress(): ip->ihl = %i\n", ip->ihl); - DEBUGP(DSLHC, "slhc_compress(): ip+1 = %s\n", - osmo_hexdump_nospc((uint8_t*)(ip+1),((ip->ihl)-5)*4)); - DEBUGP(DSLHC, "slhc_compress(): Unexpected change: cs->cs_ipopt = %s\n", - osmo_hexdump_nospc((uint8_t*)(cs->cs_ipopt),((ip->ihl)-5)*4)); - } - if(th->doff > 5 && memcmp(th+1,cs->cs_tcpopt,((th->doff)-5)*4) != 0) { - DEBUGP(DSLHC, "slhc_compress(): Unexpected change: (th->doff > 5 && memcmp(th+1,cs->cs_tcpopt,((th->doff)-5)*4) != 0)\n"); - DEBUGP(DSLHC, "slhc_compress(): th->doff = %i\n", th->doff); - DEBUGP(DSLHC, "slhc_compress(): th+1 = %s\n", - osmo_hexdump_nospc((uint8_t*)(th+1),((th->doff)-5)*4)); - DEBUGP(DSLHC, "slhc_compress(): cs->cs_tcpopt = %s\n", - osmo_hexdump_nospc((uint8_t*)cs->cs_tcpopt, - ((th->doff)-5)*4)); - } - - - if(ip->version != cs->cs_ip.version || ip->ihl != cs->cs_ip.ihl - || ip->tos != cs->cs_ip.tos - || (ip->frag_off & htons(0x4000)) != (cs->cs_ip.frag_off & htons(0x4000)) - || ip->ttl != cs->cs_ip.ttl - || th->doff != cs->cs_tcp.doff - || (ip->ihl > 5 && memcmp(ip+1,cs->cs_ipopt,((ip->ihl)-5)*4) != 0) - || (th->doff > 5 && memcmp(th+1,cs->cs_tcpopt,((th->doff)-5)*4) != 0)){ - DEBUGP(DSLHC, "slhc_compress(): The header contains unexpected changes, can't compress...\n"); - goto uncompressed; - } - - /* - * Figure out which of the changing fields changed. The - * receiver expects changes in the order: urgent, window, - * ack, seq (the order minimizes the number of temporaries - * needed in this section of code). - */ - if(th->urg){ - deltaS = ntohs(th->urg_ptr); - DEBUGP(DSLHC, "slhc_compress(): flag: Urgent Pointer (U) = 1\n"); - cp = encode(cp,deltaS); - changes |= NEW_U; - } else if(th->urg_ptr != oth->urg_ptr){ - /* argh! URG not set but urp changed -- a sensible - * implementation should never do this but RFC793 - * doesn't prohibit the change so we have to deal - * with it. */ - DEBUGP(DSLHC, "slhc_compress(): URG not set but urp changed, can't compress...\n"); - goto uncompressed; - } - if((deltaS = ntohs(th->window) - ntohs(oth->window)) != 0){ - DEBUGP(DSLHC, "slhc_compress(): flag: Delta Window (W) = 1\n"); - cp = encode(cp,deltaS); - changes |= NEW_W; - } - if((deltaA = ntohl(th->ack_seq) - ntohl(oth->ack_seq)) != 0L){ - if(deltaA > 0x0000ffff) { - DEBUGP(DSLHC, "slhc_compress(): (deltaA = ntohl(th->ack_seq) - ntohl(oth->ack_seq)) != 0L, can't compress...\n"); - goto uncompressed; - } - DEBUGP(DSLHC, "slhc_compress(): flag: Delta Ack (A) = 1\n"); - cp = encode(cp,deltaA); - changes |= NEW_A; - } - if((deltaS = ntohl(th->seq) - ntohl(oth->seq)) != 0L){ - if(deltaS > 0x0000ffff) { - DEBUGP(DSLHC, "slhc_compress(): (deltaS = ntohl(th->seq) - ntohl(oth->seq)) != 0L, can't compress...\n"); - goto uncompressed; - } - DEBUGP(DSLHC, "slhc_compress(): flag: Delta Sequence (S) = 1\n"); - cp = encode(cp,deltaS); - changes |= NEW_S; - } - - switch(changes){ - case 0: /* Nothing changed. If this packet contains data and the - * last one didn't, this is probably a data packet following - * an ack (normal on an interactive connection) and we send - * it compressed. Otherwise it's probably a retransmit, - * retransmitted ack or window probe. Send it uncompressed - * in case the other side missed the compressed version. - */ - if(ip->tot_len != cs->cs_ip.tot_len && - ntohs(cs->cs_ip.tot_len) == hlen) - break; - DEBUGP(DSLHC, "slhc_compress(): Retransmitted packet detected, can't compress...\n"); - goto uncompressed; - case SPECIAL_I: - case SPECIAL_D: - /* actual changes match one of our special case encodings -- - * send packet uncompressed. - */ - DEBUGP(DSLHC, "slhc_compress(): Special case detected, can't compress...\n"); - goto uncompressed; - case NEW_S|NEW_A: - if(deltaS == deltaA && - deltaS == ntohs(cs->cs_ip.tot_len) - hlen){ - /* special case for echoed terminal traffic */ - DEBUGP(DSLHC, "slhc_compress(): Special case for echoed terminal traffic detected...\n"); - DEBUGP(DSLHC, "slhc_compress(): flag: Delta Sequence (S) = 1, Delta Window (W) = 1, Urgent Pointer (U) = 1\n"); - changes = SPECIAL_I; - cp = new_seq; - } - break; - case NEW_S: - if(deltaS == ntohs(cs->cs_ip.tot_len) - hlen){ - /* special case for data xfer */ - DEBUGP(DSLHC, "slhc_compress(): Special case for data xfer detected...\n"); - DEBUGP(DSLHC, "slhc_compress(): flag: Delta Sequence (S) = 1, Delta Ack (A) = 1, Delta Window (W) = 1, Urgent Pointer (U) = 1\n"); - changes = SPECIAL_D; - cp = new_seq; - } - break; - } - deltaS = ntohs(ip->id) - ntohs(cs->cs_ip.id); - if(deltaS != 1){ - DEBUGP(DSLHC, "slhc_compress(): flag: Delta IP ID (I) = 1\n"); - cp = encode(cp,deltaS); - changes |= NEW_I; - } - if(th->psh) { - DEBUGP(DSLHC, "slhc_compress(): flag: Push (P) = 1\n"); - changes |= TCP_PUSH_BIT; - } - /* Grab the cksum before we overwrite it below. Then update our - * state with this packet's header. - */ - csum = th->check; - memcpy(&cs->cs_ip,ip,20); - memcpy(&cs->cs_tcp,th,20); - /* We want to use the original packet as our compressed packet. - * (cp - new_seq) is the number of bytes we need for compressed - * sequence numbers. In addition we need one byte for the change - * mask, one for the connection id and two for the tcp checksum. - * So, (cp - new_seq) + 4 bytes of header are needed. - */ - deltaS = cp - new_seq; - if(compress_cid == 0 || comp->xmit_current != cs->cs_this){ - cp = ocp; - *cpp = ocp; - DEBUGP(DSLHC, "slhc_compress(): flag: Connection number (C) = 1\n"); - *cp++ = changes | NEW_C; - *cp++ = cs->cs_this; - comp->xmit_current = cs->cs_this; - } else { - cp = ocp; - *cpp = ocp; - *cp++ = changes; - } - *(__sum16 *)cp = csum; - cp += 2; -/* deltaS is now the size of the change section of the compressed header */ - - DEBUGP(DSLHC, "slhc_compress(): Delta-list length (deltaS) = %li\n",deltaS); - DEBUGP(DSLHC, "slhc_compress(): Original header len (hlen) = %i\n",hlen); - - memcpy(cp,new_seq,deltaS); /* Write list of deltas */ - memcpy(cp+deltaS,icp+hlen,isize-hlen); - comp->sls_o_compressed++; - ocp[0] |= SL_TYPE_COMPRESSED_TCP; - return isize - hlen + deltaS + (cp - ocp); - - /* Update connection state cs & send uncompressed packet (i.e., - * a regular ip/tcp packet but with the 'conversation id' we hope - * to use on future compressed packets in the protocol field). - */ -uncompressed: - DEBUGP(DSLHC, "slhc_compress(): Packet will be sent uncompressed...\n"); - memcpy(&cs->cs_ip,ip,20); - memcpy(&cs->cs_tcp,th,20); - if (ip->ihl > 5) - memcpy(cs->cs_ipopt, ip+1, ((ip->ihl) - 5) * 4); - if (th->doff > 5) - memcpy(cs->cs_tcpopt, th+1, ((th->doff) - 5) * 4); - comp->xmit_current = cs->cs_this; - comp->sls_o_uncompressed++; - memcpy(ocp, icp, isize); - *cpp = ocp; - ocp[9] = cs->cs_this; - ocp[0] |= SL_TYPE_UNCOMPRESSED_TCP; - return isize; -} - - -int -slhc_uncompress(struct slcompress *comp, unsigned char *icp, int isize) -{ - register int changes; - long x; - register struct tcphdr *thp; - register struct iphdr *ip; - register struct cstate *cs; - int len, hdrlen; - unsigned char *cp = icp; - - /* We've got a compressed packet; read the change byte */ - comp->sls_i_compressed++; - if(isize < 3){ - comp->sls_i_error++; - return 0; - } - changes = *cp++; - if(changes & NEW_C){ - /* Make sure the state index is in range, then grab the state. - * If we have a good state index, clear the 'discard' flag. - */ - x = *cp++; /* Read conn index */ - if(x < 0 || x > comp->rslot_limit) - goto bad; - - comp->flags &=~ SLF_TOSS; - comp->recv_current = x; - } else { - /* this packet has an implicit state index. If we've - * had a line error since the last time we got an - * explicit state index, we have to toss the packet. */ - if(comp->flags & SLF_TOSS){ - comp->sls_i_tossed++; - return 0; - } - } - cs = &comp->rstate[comp->recv_current]; - thp = &cs->cs_tcp; - ip = &cs->cs_ip; - - thp->check = *(__sum16 *)cp; - cp += 2; - - thp->psh = (changes & TCP_PUSH_BIT) ? 1 : 0; -/* - * we can use the same number for the length of the saved header and - * the current one, because the packet wouldn't have been sent - * as compressed unless the options were the same as the previous one - */ - - hdrlen = ip->ihl * 4 + thp->doff * 4; - - switch(changes & SPECIALS_MASK){ - case SPECIAL_I: /* Echoed terminal traffic */ - DEBUGP(DSLHC, "slhc_uncompress(): Echoed terminal traffic detected\n"); - - { - register short i; - i = ntohs(ip->tot_len) - hdrlen; - thp->ack_seq = htonl( ntohl(thp->ack_seq) + i); - thp->seq = htonl( ntohl(thp->seq) + i); - } - break; - - case SPECIAL_D: /* Unidirectional data */ - DEBUGP(DSLHC, "slhc_uncompress(): Unidirectional data detected\n"); - thp->seq = htonl( ntohl(thp->seq) + - ntohs(ip->tot_len) - hdrlen); - break; - - default: - DEBUGP(DSLHC, "slhc_uncompress(): default packet type detected\n"); - if(changes & NEW_U){ - thp->urg = 1; - if((x = decode(&cp)) == -1) { - goto bad; - } - thp->urg_ptr = htons(x); - } else - thp->urg = 0; - if(changes & NEW_W){ - if((x = decode(&cp)) == -1) { - goto bad; - } - thp->window = htons( ntohs(thp->window) + x); - } - if(changes & NEW_A){ - if((x = decode(&cp)) == -1) { - goto bad; - } - thp->ack_seq = htonl( ntohl(thp->ack_seq) + x); - } - if(changes & NEW_S){ - if((x = decode(&cp)) == -1) { - goto bad; - } - thp->seq = htonl( ntohl(thp->seq) + x); - } - break; - } - if(changes & NEW_I){ - if((x = decode(&cp)) == -1) { - goto bad; - } - ip->id = htons (ntohs (ip->id) + x); - } else - ip->id = htons (ntohs (ip->id) + 1); - - /* - * At this point, cp points to the first byte of data in the - * packet. Put the reconstructed TCP and IP headers back on the - * packet. Recalculate IP checksum (but not TCP checksum). - */ - - len = isize - (cp - icp); - if (len < 0) - goto bad; - len += hdrlen; - ip->tot_len = htons(len); - ip->check = 0; - - DEBUGP(DSLHC, "slhc_uncompress(): making space for the reconstructed header...\n"); - memmove(icp + hdrlen, cp, len - hdrlen); - - cp = icp; - memcpy(cp, ip, 20); - cp += 20; - - if (ip->ihl > 5) { - memcpy(cp, cs->cs_ipopt, (ip->ihl - 5) * 4); - cp += (ip->ihl - 5) * 4; - } - - put_unaligned(ip_fast_csum(icp, ip->ihl), - &((struct iphdr *)icp)->check); - - memcpy(cp, thp, 20); - cp += 20; - - if (thp->doff > 5) { - memcpy(cp, cs->cs_tcpopt, ((thp->doff) - 5) * 4); - cp += ((thp->doff) - 5) * 4; - } - - return len; -bad: - DEBUGP(DSLHC, "slhc_uncompress(): bad packet detected!\n"); - comp->sls_i_error++; - return slhc_toss( comp ); -} - - -int -slhc_remember(struct slcompress *comp, unsigned char *icp, int isize) -{ - register struct cstate *cs; - unsigned ihl; - - unsigned char index; - - if(isize < 20) { - /* The packet is shorter than a legal IP header */ - comp->sls_i_runt++; - DEBUGP(DSLHC, "slhc_remember(): The packet is shorter than a legal IP header ==> slhc_toss()\n"); - return slhc_toss( comp ); - } - /* Peek at the IP header's IHL field to find its length */ - ihl = icp[0] & 0xf; - if(ihl < 20 / 4){ - /* The IP header length field is too small */ - comp->sls_i_runt++; - DEBUGP(DSLHC, "slhc_remember(): The IP header length field is too small ==> slhc_toss()\n"); - return slhc_toss( comp ); - } - index = icp[9]; - icp[9] = IPPROTO_TCP; - - if (ip_fast_csum(icp, ihl)) { - /* Bad IP header checksum; discard */ - comp->sls_i_badcheck++; - DEBUGP(DSLHC, "slhc_remember(): Bad IP header checksum; discard ==> slhc_toss()\n"); - return slhc_toss( comp ); - } - if(index > comp->rslot_limit) { - comp->sls_i_error++; - DEBUGP(DSLHC, "slhc_remember(): index > comp->rslot_limit ==> slhc_toss()\n"); - return slhc_toss(comp); - } - - /* Update local state */ - cs = &comp->rstate[comp->recv_current = index]; - comp->flags &=~ SLF_TOSS; - memcpy(&cs->cs_ip,icp,20); - memcpy(&cs->cs_tcp,icp + ihl*4,20); - if (ihl > 5) - memcpy(cs->cs_ipopt, icp + sizeof(struct iphdr), (ihl - 5) * 4); - if (cs->cs_tcp.doff > 5) - memcpy(cs->cs_tcpopt, icp + ihl*4 + sizeof(struct tcphdr), (cs->cs_tcp.doff - 5) * 4); - cs->cs_hsize = ihl*2 + cs->cs_tcp.doff*2; - /* Put headers back on packet - * Neither header checksum is recalculated - */ - comp->sls_i_uncompressed++; - return isize; -} - -int -slhc_toss(struct slcompress *comp) -{ - DEBUGP(DSLHC, "slhc_toss(): Reset compression state...\n"); - if ( comp == NULLSLCOMPR ) - return 0; - - comp->flags |= SLF_TOSS; - return 0; -} - -void slhc_i_status(struct slcompress *comp) -{ - if (comp != NULLSLCOMPR) { - DEBUGP(DSLHC, "slhc_i_status(): %d Cmp, %d Uncmp, %d Bad, %d Tossed\n", - comp->sls_i_compressed, - comp->sls_i_uncompressed, - comp->sls_i_error, - comp->sls_i_tossed); - } -} - -void slhc_o_status(struct slcompress *comp) -{ - if (comp != NULLSLCOMPR) { - DEBUGP(DSLHC, "slhc_o_status(): %d Cmp, %d Uncmp, %d AsIs, %d NotTCP %d Searches, %d Misses\n", - comp->sls_o_compressed, - comp->sls_o_uncompressed, - comp->sls_o_tcp, - comp->sls_o_nontcp, - comp->sls_o_searches, - comp->sls_o_misses); - } -} - diff --git a/openbsc/src/gprs/v42bis.c b/openbsc/src/gprs/v42bis.c deleted file mode 100644 index a04b0af5c..000000000 --- a/openbsc/src/gprs/v42bis.c +++ /dev/null @@ -1,767 +0,0 @@ -/* - * SpanDSP - a series of DSP components for telephony - * - * v42bis.c - * - * Written by Steve Underwood <steveu@coppice.org> - * - * Copyright (C) 2005, 2011 Steve Underwood - * - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1, - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -/* THIS IS A WORK IN PROGRESS. IT IS NOT FINISHED. - Currently it performs the core compression and decompression functions OK. - However, a number of the bells and whistles in V.42bis are incomplete. */ - -/*! \file */ - -#include <stdio.h> -#include <stdlib.h> -#include <inttypes.h> -#include <string.h> -#include <errno.h> -#include <fcntl.h> -#include <ctype.h> -#include <assert.h> - -#include <openbsc/v42bis.h> -#include <openbsc/v42bis_private.h> -#include <openbsc/debug.h> -#include <osmocom/core/talloc.h> - - -#define span_log(x,y,msg, ...) DEBUGP(DV42BIS,msg, ##__VA_ARGS__) -#define span_log_init(x,y,z) -#define span_log_set_protocol(x,y) - - -#define FALSE 0 -#define TRUE 1 - -/* Fixed parameters from the spec. */ -/* Character size (bits) */ -#define V42BIS_N3 8 -/* Number of characters in the alphabet */ -#define V42BIS_N4 256 -/* Index number of first dictionary entry used to store a string */ -#define V42BIS_N5 (V42BIS_N4 + V42BIS_N6) -/* Number of control codewords */ -#define V42BIS_N6 3 -/* V.42bis/9.2 */ -#define V42BIS_ESC_STEP 51 - -/* Compreeibility monitoring parameters for assessing automated switches between - transparent and compressed mode */ -#define COMPRESSIBILITY_MONITOR (256*V42BIS_N3) -#define COMPRESSIBILITY_MONITOR_HYSTERESIS 11 - -/* Control code words in compressed mode */ -enum -{ - V42BIS_ETM = 0, /* Enter transparent mode */ - V42BIS_FLUSH = 1, /* Flush data */ - V42BIS_STEPUP = 2 /* Step up codeword size */ -}; - -/* Command codes in transparent mode */ -enum -{ - V42BIS_ECM = 0, /* Enter compression mode */ - V42BIS_EID = 1, /* Escape character in data */ - V42BIS_RESET = 2 /* Force reinitialisation */ -}; - -static __inline__ void push_octet(v42bis_comp_state_t *s, int octet) -{ - s->output_buf[s->output_octet_count++] = (uint8_t) octet; - if (s->output_octet_count >= s->max_output_len) - { - s->handler(s->user_data, s->output_buf, s->output_octet_count); - s->output_octet_count = 0; - } -} -/*- End of function --------------------------------------------------------*/ - -static __inline__ void push_octets(v42bis_comp_state_t *s, const uint8_t buf[], int len) -{ - int i; - int chunk; - - i = 0; - while ((s->output_octet_count + len - i) >= s->max_output_len) - { - chunk = s->max_output_len - s->output_octet_count; - memcpy(&s->output_buf[s->output_octet_count], &buf[i], chunk); - s->handler(s->user_data, s->output_buf, s->max_output_len); - s->output_octet_count = 0; - i += chunk; - } - chunk = len - i; - if (chunk > 0) - { - memcpy(&s->output_buf[s->output_octet_count], &buf[i], chunk); - s->output_octet_count += chunk; - } -} -/*- End of function --------------------------------------------------------*/ - -static __inline__ void push_compressed_code(v42bis_comp_state_t *s, int code) -{ - s->bit_buffer |= code << s->bit_count; - s->bit_count += s->v42bis_parm_c2; - while (s->bit_count >= 8) - { - push_octet(s, s->bit_buffer & 0xFF); - s->bit_buffer >>= 8; - s->bit_count -= 8; - } -} -/*- End of function --------------------------------------------------------*/ - -static __inline__ void push_octet_alignment(v42bis_comp_state_t *s) -{ - if ((s->bit_count & 7)) - { - s->bit_count += (8 - (s->bit_count & 7)); - while (s->bit_count >= 8) - { - push_octet(s, s->bit_buffer & 0xFF); - s->bit_buffer >>= 8; - s->bit_count -= 8; - } - } -} -/*- End of function --------------------------------------------------------*/ - -static __inline__ void flush_octets(v42bis_comp_state_t *s) -{ - if (s->output_octet_count > 0) - { - s->handler(s->user_data, s->output_buf, s->output_octet_count); - s->output_octet_count = 0; - } -} -/*- End of function --------------------------------------------------------*/ - -static void dictionary_init(v42bis_comp_state_t *s) -{ - int i; - - memset(s->dict, 0, sizeof(s->dict)); - for (i = 0; i < V42BIS_N4; i++) - s->dict[i + V42BIS_N6].node_octet = i; - s->v42bis_parm_c1 = V42BIS_N5; - s->v42bis_parm_c2 = V42BIS_N3 + 1; - s->v42bis_parm_c3 = V42BIS_N4 << 1; - s->last_matched = 0; - s->update_at = 0; - s->last_added = 0; - s->bit_buffer = 0; - s->bit_count = 0; - s->flushed_length = 0; - s->string_length = 0; - s->escape_code = 0; - s->transparent = TRUE; - s->escaped = FALSE; - s->compression_performance = COMPRESSIBILITY_MONITOR; -} -/*- End of function --------------------------------------------------------*/ - -static uint16_t match_octet(v42bis_comp_state_t *s, uint16_t at, uint8_t octet) -{ - uint16_t e; - - if (at == 0) - return octet + V42BIS_N6; - e = s->dict[at].child; - while (e) - { - if (s->dict[e].node_octet == octet) - return e; - e = s->dict[e].next; - } - return 0; -} -/*- End of function --------------------------------------------------------*/ - -static uint16_t add_octet_to_dictionary(v42bis_comp_state_t *s, uint16_t at, uint8_t octet) -{ - uint16_t newx; - uint16_t next; - uint16_t e; - - newx = s->v42bis_parm_c1; - s->dict[newx].node_octet = octet; - s->dict[newx].parent = at; - s->dict[newx].child = 0; - s->dict[newx].next = s->dict[at].child; - s->dict[at].child = newx; - next = newx; - /* 6.5 Recovering a dictionary entry to use next */ - do - { - /* 6.5(a) and (b) */ - if (++next == s->v42bis_parm_n2) - next = V42BIS_N5; - } - while (s->dict[next].child); - /* 6.5(c) We need to reuse a leaf node */ - if (s->dict[next].parent) - { - /* 6.5(d) Detach the leaf node from its parent, and re-use it */ - e = s->dict[next].parent; - if (s->dict[e].child == next) - { - s->dict[e].child = s->dict[next].next; - } - else - { - e = s->dict[e].child; - while (s->dict[e].next != next) - e = s->dict[e].next; - s->dict[e].next = s->dict[next].next; - } - } - s->v42bis_parm_c1 = next; - return newx; -} -/*- End of function --------------------------------------------------------*/ - -static void send_string(v42bis_comp_state_t *s) -{ - push_octets(s, s->string, s->string_length); - s->string_length = 0; - s->flushed_length = 0; -} -/*- End of function --------------------------------------------------------*/ - -static void expand_codeword_to_string(v42bis_comp_state_t *s, uint16_t code) -{ - int i; - uint16_t p; - - /* Work out the length */ - for (i = 0, p = code; p; i++) - p = s->dict[p].parent; - s->string_length += i; - /* Now expand the known length of string */ - i = s->string_length - 1; - for (p = code; p; ) - { - s->string[i--] = s->dict[p].node_octet; - p = s->dict[p].parent; - } -} -/*- End of function --------------------------------------------------------*/ - -static void send_encoded_data(v42bis_comp_state_t *s, uint16_t code) -{ - int i; - - /* Update compressibility metric */ - /* Integrate at the compressed bit rate, and leak at the pre-compression bit rate */ - s->compression_performance += (s->v42bis_parm_c2 - s->compression_performance*s->string_length*V42BIS_N3/COMPRESSIBILITY_MONITOR); - if (s->transparent) - { - for (i = 0; i < s->string_length; i++) - { - push_octet(s, s->string[i]); - if (s->string[i] == s->escape_code) - { - push_octet(s, V42BIS_EID); - s->escape_code += V42BIS_ESC_STEP; - } - } - } - else - { - /* Allow for any escape octets in the string */ - for (i = 0; i < s->string_length; i++) - { - if (s->string[i] == s->escape_code) - s->escape_code += V42BIS_ESC_STEP; - } - /* 7.4 Encoding - we now have the longest matchable string, and will need to output the code for it. */ - while (code >= s->v42bis_parm_c3) - { - /* We need to increase the codeword size */ - /* 7.4(a) */ - push_compressed_code(s, V42BIS_STEPUP); - /* 7.4(b) */ - s->v42bis_parm_c2++; - /* 7.4(c) */ - s->v42bis_parm_c3 <<= 1; - /* 7.4(d) this might need to be repeated, so we loop */ - } - /* 7.5 Transfer - output the last state of the string */ - push_compressed_code(s, code); - } - s->string_length = 0; - s->flushed_length = 0; -} -/*- End of function --------------------------------------------------------*/ - -static void go_compressed(v42bis_state_t *ss) -{ - v42bis_comp_state_t *s; - - s = &ss->compress; - if (!s->transparent) - return; - span_log(&ss->logging, SPAN_LOG_FLOW, "Changing to compressed mode\n"); - /* Switch out of transparent now, between codes. We need to send the octet which did not - match, just before switching. */ - if (s->last_matched) - { - s->update_at = s->last_matched; - send_encoded_data(s, s->last_matched); - s->last_matched = 0; - } - push_octet(s, s->escape_code); - push_octet(s, V42BIS_ECM); - s->bit_buffer = 0; - s->transparent = FALSE; -} -/*- End of function --------------------------------------------------------*/ - -static void go_transparent(v42bis_state_t *ss) -{ - v42bis_comp_state_t *s; - - s = &ss->compress; - if (s->transparent) - return; - span_log(&ss->logging, SPAN_LOG_FLOW, "Changing to transparent mode\n"); - /* Switch into transparent now, between codes, and the unmatched octet should - go out in transparent mode, just below */ - if (s->last_matched) - { - s->update_at = s->last_matched; - send_encoded_data(s, s->last_matched); - s->last_matched = 0; - } - s->last_added = 0; - push_compressed_code(s, V42BIS_ETM); - push_octet_alignment(s); - s->transparent = TRUE; -} -/*- End of function --------------------------------------------------------*/ - -static void monitor_for_mode_change(v42bis_state_t *ss) -{ - v42bis_comp_state_t *s; - - s = &ss->compress; - switch (s->compression_mode) - { - case V42BIS_COMPRESSION_MODE_DYNAMIC: - /* 7.8 Data compressibility test */ - if (s->transparent) - { - if (s->compression_performance < COMPRESSIBILITY_MONITOR - COMPRESSIBILITY_MONITOR_HYSTERESIS) - { - /* 7.8.1 Transition to compressed mode */ - go_compressed(ss); - } - } - else - { - if (s->compression_performance > COMPRESSIBILITY_MONITOR) - { - /* 7.8.2 Transition to transparent mode */ - go_transparent(ss); - } - } - /* 7.8.3 Reset function - TODO */ - break; - case V42BIS_COMPRESSION_MODE_ALWAYS: - if (s->transparent) - go_compressed(ss); - break; - case V42BIS_COMPRESSION_MODE_NEVER: - if (!s->transparent) - go_transparent(ss); - break; - } -} -/*- End of function --------------------------------------------------------*/ - -static int v42bis_comp_init(v42bis_comp_state_t *s, - int p1, - int p2, - put_msg_func_t handler, - void *user_data, - int max_output_len) -{ - memset(s, 0, sizeof(*s)); - s->v42bis_parm_n2 = p1; - s->v42bis_parm_n7 = p2; - s->handler = handler; - s->user_data = user_data; - s->max_output_len = (max_output_len < V42BIS_MAX_OUTPUT_LENGTH) ? max_output_len : V42BIS_MAX_OUTPUT_LENGTH; - s->output_octet_count = 0; - dictionary_init(s); - return 0; -} -/*- End of function --------------------------------------------------------*/ - -static int comp_exit(v42bis_comp_state_t *s) -{ - s->v42bis_parm_n2 = 0; - return 0; -} -/*- End of function --------------------------------------------------------*/ - -SPAN_DECLARE(int) v42bis_compress(v42bis_state_t *ss, const uint8_t buf[], int len) -{ - v42bis_comp_state_t *s; - int i; - uint16_t code; - - s = &ss->compress; - if (!s->v42bis_parm_p0) - { - /* Compression is off - just push the incoming data out */ - push_octets(s, buf, len); - return 0; - } - for (i = 0; i < len; ) - { - /* 6.4 Add the string to the dictionary */ - if (s->update_at) - { - if (match_octet(s, s->update_at, buf[i]) == 0) - s->last_added = add_octet_to_dictionary(s, s->update_at, buf[i]); - s->update_at = 0; - } - /* Match string */ - while (i < len) - { - code = match_octet(s, s->last_matched, buf[i]); - if (code == 0) - { - s->update_at = s->last_matched; - send_encoded_data(s, s->last_matched); - s->last_matched = 0; - break; - } - if (code == s->last_added) - { - s->last_added = 0; - send_encoded_data(s, s->last_matched); - s->last_matched = 0; - break; - } - s->last_matched = code; - /* 6.3(b) If the string matches a dictionary entry, and the entry is not that entry - created by the last invocation of the string matching procedure, then the - next character shall be read and appended to the string and this step - repeated. */ - s->string[s->string_length++] = buf[i++]; - /* 6.4(a) The string must not exceed N7 in length */ - if (s->string_length + s->flushed_length == s->v42bis_parm_n7) - { - send_encoded_data(s, s->last_matched); - s->last_matched = 0; - break; - } - } - monitor_for_mode_change(ss); - } - return 0; -} -/*- End of function --------------------------------------------------------*/ - -SPAN_DECLARE(int) v42bis_compress_flush(v42bis_state_t *ss) -{ - v42bis_comp_state_t *s; - int len; - - s = &ss->compress; - if (s->update_at) - return 0; - if (s->last_matched) - { - len = s->string_length; - send_encoded_data(s, s->last_matched); - s->flushed_length += len; - } - if (!s->transparent) - { - s->update_at = s->last_matched; - s->last_matched = 0; - s->flushed_length = 0; - push_compressed_code(s, V42BIS_FLUSH); - push_octet_alignment(s); - } - flush_octets(s); - return 0; -} -/*- End of function --------------------------------------------------------*/ - -SPAN_DECLARE(int) v42bis_decompress(v42bis_state_t *ss, const uint8_t buf[], int len) -{ - v42bis_comp_state_t *s; - int i; - int j; - int yyy; - uint16_t code; - uint16_t p; - uint8_t ch; - uint8_t in; - - s = &ss->decompress; - if (!s->v42bis_parm_p0) - { - /* Compression is off - just push the incoming data out */ - push_octets(s, buf, len); - return 0; - } - for (i = 0; i < len; ) - { - if (s->transparent) - { - in = buf[i]; - if (s->escaped) - { - /* Command */ - s->escaped = FALSE; - switch (in) - { - case V42BIS_ECM: - /* Enter compressed mode */ - span_log(&ss->logging, SPAN_LOG_FLOW, "Hit V42BIS_ECM\n"); - send_string(s); - s->transparent = FALSE; - s->update_at = s->last_matched; - s->last_matched = 0; - i++; - continue; - case V42BIS_EID: - /* Escape symbol */ - span_log(&ss->logging, SPAN_LOG_FLOW, "Hit V42BIS_EID\n"); - in = s->escape_code; - s->escape_code += V42BIS_ESC_STEP; - break; - case V42BIS_RESET: - /* Reset dictionary */ - span_log(&ss->logging, SPAN_LOG_FLOW, "Hit V42BIS_RESET\n"); - /* TODO: */ - send_string(s); - dictionary_init(s); - i++; - continue; - default: - span_log(&ss->logging, SPAN_LOG_FLOW, "Hit V42BIS_???? - %" PRIu32 "\n", in); - return -1; - } - } - else if (in == s->escape_code) - { - s->escaped = TRUE; - i++; - continue; - } - - yyy = TRUE; - for (j = 0; j < 2 && yyy; j++) - { - if (s->update_at) - { - if (match_octet(s, s->update_at, in) == 0) - s->last_added = add_octet_to_dictionary(s, s->update_at, in); - s->update_at = 0; - } - - code = match_octet(s, s->last_matched, in); - if (code == 0) - { - s->update_at = s->last_matched; - send_string(s); - s->last_matched = 0; - } - else if (code == s->last_added) - { - s->last_added = 0; - send_string(s); - s->last_matched = 0; - } - else - { - s->last_matched = code; - s->string[s->string_length++] = in; - if (s->string_length + s->flushed_length == s->v42bis_parm_n7) - { - send_string(s); - s->last_matched = 0; - } - i++; - yyy = FALSE; - } - } - } - else - { - /* Get code from input */ - while (s->bit_count < s->v42bis_parm_c2 && i < len) - { - s->bit_buffer |= buf[i++] << s->bit_count; - s->bit_count += 8; - } - if (s->bit_count < s->v42bis_parm_c2) - continue; - code = s->bit_buffer & ((1 << s->v42bis_parm_c2) - 1); - s->bit_buffer >>= s->v42bis_parm_c2; - s->bit_count -= s->v42bis_parm_c2; - - if (code < V42BIS_N6) - { - /* We have a control code. */ - switch (code) - { - case V42BIS_ETM: - /* Enter transparent mode */ - span_log(&ss->logging, SPAN_LOG_FLOW, "Hit V42BIS_ETM\n"); - s->bit_count = 0; - s->transparent = TRUE; - s->last_matched = 0; - s->last_added = 0; - break; - case V42BIS_FLUSH: - /* Flush signal */ - span_log(&ss->logging, SPAN_LOG_FLOW, "Hit V42BIS_FLUSH\n"); - s->bit_count = 0; - break; - case V42BIS_STEPUP: - /* Increase code word size */ - span_log(&ss->logging, SPAN_LOG_FLOW, "Hit V42BIS_STEPUP\n"); - s->v42bis_parm_c2++; - s->v42bis_parm_c3 <<= 1; - if (s->v42bis_parm_c2 > (s->v42bis_parm_n2 >> 3)) - return -1; - break; - } - continue; - } - /* Regular codeword */ - if (code == s->v42bis_parm_c1) - return -1; - expand_codeword_to_string(s, code); - if (s->update_at) - { - ch = s->string[0]; - if ((p = match_octet(s, s->update_at, ch)) == 0) - { - s->last_added = add_octet_to_dictionary(s, s->update_at, ch); - if (code == s->v42bis_parm_c1) - return -1; - } - else if (p == s->last_added) - { - s->last_added = 0; - } - } - s->update_at = ((s->string_length + s->flushed_length) == s->v42bis_parm_n7) ? 0 : code; - /* Allow for any escapes which may be in this string */ - for (j = 0; j < s->string_length; j++) - { - if (s->string[j] == s->escape_code) - s->escape_code += V42BIS_ESC_STEP; - } - send_string(s); - } - } - return 0; -} -/*- End of function --------------------------------------------------------*/ - -SPAN_DECLARE(int) v42bis_decompress_flush(v42bis_state_t *ss) -{ - v42bis_comp_state_t *s; - int len; - - s = &ss->decompress; - len = s->string_length; - send_string(s); - s->flushed_length += len; - flush_octets(s); - return 0; -} -/*- End of function --------------------------------------------------------*/ - -SPAN_DECLARE(void) v42bis_compression_control(v42bis_state_t *s, int mode) -{ - s->compress.compression_mode = mode; -} -/*- End of function --------------------------------------------------------*/ - -SPAN_DECLARE(v42bis_state_t *) v42bis_init(const void *ctx, - v42bis_state_t *s, - int negotiated_p0, - int negotiated_p1, - int negotiated_p2, - put_msg_func_t encode_handler, - void *encode_user_data, - int max_encode_len, - put_msg_func_t decode_handler, - void *decode_user_data, - int max_decode_len) -{ - int ret; - - if (negotiated_p1 < V42BIS_MIN_DICTIONARY_SIZE || negotiated_p1 > 65535) - return NULL; - if (negotiated_p2 < V42BIS_MIN_STRING_SIZE || negotiated_p2 > V42BIS_MAX_STRING_SIZE) - return NULL; - if (s == NULL) - { - if ((s = (v42bis_state_t *) talloc_zero_size(ctx,sizeof(*s))) == NULL) - return NULL; - } - memset(s, 0, sizeof(*s)); - span_log_init(&s->logging, SPAN_LOG_NONE, NULL); - span_log_set_protocol(&s->logging, "V.42bis"); - - if ((ret = v42bis_comp_init(&s->compress, negotiated_p1, negotiated_p2, encode_handler, encode_user_data, max_encode_len))) - return NULL; - if ((ret = v42bis_comp_init(&s->decompress, negotiated_p1, negotiated_p2, decode_handler, decode_user_data, max_decode_len))) - { - comp_exit(&s->compress); - return NULL; - } - s->compress.v42bis_parm_p0 = negotiated_p0 & 2; - s->decompress.v42bis_parm_p0 = negotiated_p0 & 1; - - return s; -} -/*- End of function --------------------------------------------------------*/ - -SPAN_DECLARE(int) v42bis_release(v42bis_state_t *s) -{ - return 0; -} -/*- End of function --------------------------------------------------------*/ - -SPAN_DECLARE(int) v42bis_free(v42bis_state_t *s) -{ - comp_exit(&s->compress); - comp_exit(&s->decompress); - talloc_free(s); - return 0; -} -/*- End of function --------------------------------------------------------*/ -/*- End of file ------------------------------------------------------------*/ |