diff options
Diffstat (limited to 'openbsc/src/libgb')
| -rw-r--r-- | openbsc/src/libgb/Makefile.am | 9 | ||||
| -rw-r--r-- | openbsc/src/libgb/gprs_bssgp.c | 856 | ||||
| -rw-r--r-- | openbsc/src/libgb/gprs_bssgp_util.c | 119 | ||||
| -rw-r--r-- | openbsc/src/libgb/gprs_bssgp_vty.c | 176 | ||||
| -rw-r--r-- | openbsc/src/libgb/gprs_ns.c | 992 | ||||
| -rw-r--r-- | openbsc/src/libgb/gprs_ns_frgre.c | 304 | ||||
| -rw-r--r-- | openbsc/src/libgb/gprs_ns_vty.c | 569 |
7 files changed, 3025 insertions, 0 deletions
diff --git a/openbsc/src/libgb/Makefile.am b/openbsc/src/libgb/Makefile.am new file mode 100644 index 000000000..b48b17791 --- /dev/null +++ b/openbsc/src/libgb/Makefile.am @@ -0,0 +1,9 @@ +INCLUDES = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir) +AM_CFLAGS=-Wall -fno-strict-aliasing $(LIBOSMOCORE_CFLAGS) $(LIBOSMOVTY_CFLAGS) $(COVERAGE_CFLAGS) +AM_LDFLAGS = $(LIBOSMOCORE_LIBS) $(LIBOSMOVTY_LIBS) $(COVERAGE_LDFLAGS) + +noinst_LIBRARIES = libgb.a + +libgb_a_SOURCES = gprs_ns.c gprs_ns_frgre.c gprs_ns_vty.c \ + gprs_bssgp.c gprs_bssgp_util.c gprs_bssgp_vty.c +#gprs_llc.c gprs_llc_vty.c crc24.c diff --git a/openbsc/src/libgb/gprs_bssgp.c b/openbsc/src/libgb/gprs_bssgp.c new file mode 100644 index 000000000..eca34b989 --- /dev/null +++ b/openbsc/src/libgb/gprs_bssgp.c @@ -0,0 +1,856 @@ +/* GPRS BSSGP protocol implementation as per 3GPP TS 08.18 */ + +/* (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/>. + * + * TODO: + * o properly count incoming BVC-RESET packets in counter group + * o set log context as early as possible for outgoing packets + */ + +#include <errno.h> +#include <stdint.h> + +#include <netinet/in.h> + +#include <osmocore/msgb.h> +#include <osmocore/tlv.h> +#include <osmocore/talloc.h> +#include <osmocore/rate_ctr.h> + +#include <openbsc/debug.h> +#include <openbsc/gsm_data.h> +#include <openbsc/gsm_04_08_gprs.h> +#include <openbsc/gprs_bssgp.h> +#include <openbsc/gprs_llc.h> +#include <openbsc/gprs_ns.h> +#include <openbsc/gprs_sgsn.h> +#include <openbsc/gprs_gmm.h> + +void *bssgp_tall_ctx = NULL; + +#define BVC_F_BLOCKED 0x0001 + +enum bssgp_ctr { + BSSGP_CTR_PKTS_IN, + BSSGP_CTR_PKTS_OUT, + BSSGP_CTR_BYTES_IN, + BSSGP_CTR_BYTES_OUT, + BSSGP_CTR_BLOCKED, + BSSGP_CTR_DISCARDED, +}; + +static const struct rate_ctr_desc bssgp_ctr_description[] = { + { "packets.in", "Packets at BSSGP Level ( In)" }, + { "packets.out","Packets at BSSGP Level (Out)" }, + { "bytes.in", "Bytes at BSSGP Level ( In)" }, + { "bytes.out", "Bytes at BSSGP Level (Out)" }, + { "blocked", "BVC Blocking count" }, + { "discarded", "BVC LLC Discarded count" }, +}; + +static const struct rate_ctr_group_desc bssgp_ctrg_desc = { + .group_name_prefix = "bssgp.bss_ctx", + .group_description = "BSSGP Peer Statistics", + .num_ctr = ARRAY_SIZE(bssgp_ctr_description), + .ctr_desc = bssgp_ctr_description, +}; + +LLIST_HEAD(bssgp_bvc_ctxts); + +/* Find a BTS Context based on parsed RA ID and Cell ID */ +struct bssgp_bvc_ctx *btsctx_by_raid_cid(const struct gprs_ra_id *raid, uint16_t cid) +{ + struct bssgp_bvc_ctx *bctx; + + llist_for_each_entry(bctx, &bssgp_bvc_ctxts, list) { + if (!memcmp(&bctx->ra_id, raid, sizeof(bctx->ra_id)) && + bctx->cell_id == cid) + return bctx; + } + return NULL; +} + +/* Find a BTS context based on BVCI+NSEI tuple */ +struct bssgp_bvc_ctx *btsctx_by_bvci_nsei(uint16_t bvci, uint16_t nsei) +{ + struct bssgp_bvc_ctx *bctx; + + llist_for_each_entry(bctx, &bssgp_bvc_ctxts, list) { + if (bctx->nsei == nsei && bctx->bvci == bvci) + return bctx; + } + return NULL; +} + +struct bssgp_bvc_ctx *btsctx_alloc(uint16_t bvci, uint16_t nsei) +{ + struct bssgp_bvc_ctx *ctx; + + ctx = talloc_zero(bssgp_tall_ctx, struct bssgp_bvc_ctx); + if (!ctx) + return NULL; + ctx->bvci = bvci; + ctx->nsei = nsei; + /* FIXME: BVCI is not unique, only BVCI+NSEI ?!? */ + ctx->ctrg = rate_ctr_group_alloc(ctx, &bssgp_ctrg_desc, bvci); + + llist_add(&ctx->list, &bssgp_bvc_ctxts); + + return ctx; +} + +/* Chapter 10.4.5: Flow Control BVC ACK */ +static int bssgp_tx_fc_bvc_ack(uint16_t nsei, uint8_t tag, uint16_t ns_bvci) +{ + struct msgb *msg = bssgp_msgb_alloc(); + struct bssgp_normal_hdr *bgph = + (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph)); + + msgb_nsei(msg) = nsei; + msgb_bvci(msg) = ns_bvci; + + bgph->pdu_type = BSSGP_PDUT_FLOW_CONTROL_BVC_ACK; + msgb_tvlv_put(msg, BSSGP_IE_TAG, 1, &tag); + + return gprs_ns_sendmsg(bssgp_nsi, msg); +} + +/* 10.3.7 SUSPEND-ACK PDU */ +int bssgp_tx_suspend_ack(uint16_t nsei, uint32_t tlli, + const struct gprs_ra_id *ra_id, uint8_t suspend_ref) +{ + struct msgb *msg = bssgp_msgb_alloc(); + struct bssgp_normal_hdr *bgph = + (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph)); + uint32_t _tlli; + uint8_t ra[6]; + + msgb_nsei(msg) = nsei; + msgb_bvci(msg) = 0; /* Signalling */ + bgph->pdu_type = BSSGP_PDUT_SUSPEND_ACK; + + _tlli = htonl(tlli); + msgb_tvlv_put(msg, BSSGP_IE_TLLI, 4, (uint8_t *) &_tlli); + gsm48_construct_ra(ra, ra_id); + msgb_tvlv_put(msg, BSSGP_IE_ROUTEING_AREA, 6, ra); + msgb_tvlv_put(msg, BSSGP_IE_SUSPEND_REF_NR, 1, &suspend_ref); + + return gprs_ns_sendmsg(bssgp_nsi, msg); +} + +/* 10.3.8 SUSPEND-NACK PDU */ +int bssgp_tx_suspend_nack(uint16_t nsei, uint32_t tlli, + const struct gprs_ra_id *ra_id, + uint8_t *cause) +{ + struct msgb *msg = bssgp_msgb_alloc(); + struct bssgp_normal_hdr *bgph = + (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph)); + uint32_t _tlli; + uint8_t ra[6]; + + msgb_nsei(msg) = nsei; + msgb_bvci(msg) = 0; /* Signalling */ + bgph->pdu_type = BSSGP_PDUT_SUSPEND_NACK; + + _tlli = htonl(tlli); + msgb_tvlv_put(msg, BSSGP_IE_TLLI, 4, (uint8_t *) &_tlli); + gsm48_construct_ra(ra, ra_id); + msgb_tvlv_put(msg, BSSGP_IE_ROUTEING_AREA, 6, ra); + if (cause) + msgb_tvlv_put(msg, BSSGP_IE_CAUSE, 1, cause); + + return gprs_ns_sendmsg(bssgp_nsi, msg); +} + +/* 10.3.10 RESUME-ACK PDU */ +int bssgp_tx_resume_ack(uint16_t nsei, uint32_t tlli, + const struct gprs_ra_id *ra_id) +{ + struct msgb *msg = bssgp_msgb_alloc(); + struct bssgp_normal_hdr *bgph = + (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph)); + uint32_t _tlli; + uint8_t ra[6]; + + msgb_nsei(msg) = nsei; + msgb_bvci(msg) = 0; /* Signalling */ + bgph->pdu_type = BSSGP_PDUT_RESUME_ACK; + + _tlli = htonl(tlli); + msgb_tvlv_put(msg, BSSGP_IE_TLLI, 4, (uint8_t *) &_tlli); + gsm48_construct_ra(ra, ra_id); + msgb_tvlv_put(msg, BSSGP_IE_ROUTEING_AREA, 6, ra); + + return gprs_ns_sendmsg(bssgp_nsi, msg); +} + +/* 10.3.11 RESUME-NACK PDU */ +int bssgp_tx_resume_nack(uint16_t nsei, uint32_t tlli, + const struct gprs_ra_id *ra_id, uint8_t *cause) +{ + struct msgb *msg = bssgp_msgb_alloc(); + struct bssgp_normal_hdr *bgph = + (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph)); + uint32_t _tlli; + uint8_t ra[6]; + + msgb_nsei(msg) = nsei; + msgb_bvci(msg) = 0; /* Signalling */ + bgph->pdu_type = BSSGP_PDUT_SUSPEND_NACK; + + _tlli = htonl(tlli); + msgb_tvlv_put(msg, BSSGP_IE_TLLI, 4, (uint8_t *) &_tlli); + gsm48_construct_ra(ra, ra_id); + msgb_tvlv_put(msg, BSSGP_IE_ROUTEING_AREA, 6, ra); + if (cause) + msgb_tvlv_put(msg, BSSGP_IE_CAUSE, 1, cause); + + return gprs_ns_sendmsg(bssgp_nsi, msg); +} + +uint16_t bssgp_parse_cell_id(struct gprs_ra_id *raid, const uint8_t *buf) +{ + /* 6 octets RAC */ + gsm48_parse_ra(raid, buf); + /* 2 octets CID */ + return ntohs(*(uint16_t *) (buf+6)); +} + +/* Chapter 8.4 BVC-Reset Procedure */ +static int bssgp_rx_bvc_reset(struct msgb *msg, struct tlv_parsed *tp, + uint16_t ns_bvci) +{ + struct bssgp_bvc_ctx *bctx; + uint16_t nsei = msgb_nsei(msg); + uint16_t bvci; + int rc; + + bvci = ntohs(*(uint16_t *)TLVP_VAL(tp, BSSGP_IE_BVCI)); + DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx RESET cause=%s\n", bvci, + bssgp_cause_str(*TLVP_VAL(tp, BSSGP_IE_CAUSE))); + + /* look-up or create the BTS context for this BVC */ + bctx = btsctx_by_bvci_nsei(bvci, nsei); + if (!bctx) + bctx = btsctx_alloc(bvci, nsei); + + /* As opposed to NS-VCs, BVCs are NOT blocked after RESET */ + bctx->state &= ~BVC_S_BLOCKED; + + /* When we receive a BVC-RESET PDU (at least of a PTP BVCI), the BSS + * informs us about its RAC + Cell ID, so we can create a mapping */ + if (bvci != 0 && bvci != 1) { + if (!TLVP_PRESENT(tp, BSSGP_IE_CELL_ID)) { + LOGP(DBSSGP, LOGL_ERROR, "BSSGP BVCI=%u RESET " + "missing mandatory IE\n", bvci); + return -EINVAL; + } + /* actually extract RAC / CID */ + bctx->cell_id = bssgp_parse_cell_id(&bctx->ra_id, + TLVP_VAL(tp, BSSGP_IE_CELL_ID)); + LOGP(DBSSGP, LOGL_NOTICE, "Cell %u-%u-%u-%u CI %u on BVCI %u\n", + bctx->ra_id.mcc, bctx->ra_id.mnc, bctx->ra_id.lac, + bctx->ra_id.rac, bctx->cell_id, bvci); + } + + /* Acknowledge the RESET to the BTS */ + rc = bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_RESET_ACK, + nsei, bvci, ns_bvci); + return 0; +} + +static int bssgp_rx_bvc_block(struct msgb *msg, struct tlv_parsed *tp) +{ + uint16_t bvci; + struct bssgp_bvc_ctx *ptp_ctx; + + bvci = ntohs(*(uint16_t *)TLVP_VAL(tp, BSSGP_IE_BVCI)); + if (bvci == BVCI_SIGNALLING) { + /* 8.3.2: Signalling BVC shall never be blocked */ + LOGP(DBSSGP, LOGL_ERROR, "NSEI=%u/BVCI=%u " + "received block for signalling BVC!?!\n", + msgb_nsei(msg), msgb_bvci(msg)); + return 0; + } + + LOGP(DBSSGP, LOGL_INFO, "BSSGP BVCI=%u BVC-BLOCK\n", bvci); + + ptp_ctx = btsctx_by_bvci_nsei(bvci, msgb_nsei(msg)); + if (!ptp_ctx) + return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, &bvci, msg); + + ptp_ctx->state |= BVC_S_BLOCKED; + rate_ctr_inc(&ptp_ctx->ctrg->ctr[BSSGP_CTR_BLOCKED]); + + /* FIXME: Send NM_BVC_BLOCK.ind to NM */ + + /* We always acknowledge the BLOCKing */ + return bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_BLOCK_ACK, msgb_nsei(msg), + bvci, msgb_bvci(msg)); +}; + +static int bssgp_rx_bvc_unblock(struct msgb *msg, struct tlv_parsed *tp) +{ + uint16_t bvci; + struct bssgp_bvc_ctx *ptp_ctx; + + bvci = ntohs(*(uint16_t *)TLVP_VAL(tp, BSSGP_IE_BVCI)); + if (bvci == BVCI_SIGNALLING) { + /* 8.3.2: Signalling BVC shall never be blocked */ + LOGP(DBSSGP, LOGL_ERROR, "NSEI=%u/BVCI=%u " + "received unblock for signalling BVC!?!\n", + msgb_nsei(msg), msgb_bvci(msg)); + return 0; + } + + DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx BVC-UNBLOCK\n", bvci); + + ptp_ctx = btsctx_by_bvci_nsei(bvci, msgb_nsei(msg)); + if (!ptp_ctx) + return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, &bvci, msg); + + ptp_ctx->state &= ~BVC_S_BLOCKED; + + /* FIXME: Send NM_BVC_UNBLOCK.ind to NM */ + + /* We always acknowledge the unBLOCKing */ + return bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_UNBLOCK_ACK, msgb_nsei(msg), + bvci, msgb_bvci(msg)); +}; + +/* Uplink unit-data */ +static int bssgp_rx_ul_ud(struct msgb *msg, struct tlv_parsed *tp, + struct bssgp_bvc_ctx *ctx) +{ + struct bssgp_ud_hdr *budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg); + + /* extract TLLI and parse TLV IEs */ + msgb_tlli(msg) = ntohl(budh->tlli); + + DEBUGP(DBSSGP, "BSSGP TLLI=0x%08x UPLINK-UNITDATA\n", msgb_tlli(msg)); + + /* Cell ID and LLC_PDU are the only mandatory IE */ + if (!TLVP_PRESENT(tp, BSSGP_IE_CELL_ID) || + !TLVP_PRESENT(tp, BSSGP_IE_LLC_PDU)) { + LOGP(DBSSGP, LOGL_ERROR, "BSSGP TLLI=0x%08x Rx UL-UD " + "missing mandatory IE\n", msgb_tlli(msg)); + return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); + } + + /* store pointer to LLC header and CELL ID in msgb->cb */ + msgb_llch(msg) = (uint8_t *) TLVP_VAL(tp, BSSGP_IE_LLC_PDU); + msgb_bcid(msg) = (uint8_t *) TLVP_VAL(tp, BSSGP_IE_CELL_ID); + + return gprs_llc_rcvmsg(msg, tp); +} + +static int bssgp_rx_suspend(struct msgb *msg, struct tlv_parsed *tp, + struct bssgp_bvc_ctx *ctx) +{ + struct bssgp_normal_hdr *bgph = + (struct bssgp_normal_hdr *) msgb_bssgph(msg); + struct gprs_ra_id raid; + uint32_t tlli; + int rc; + + if (!TLVP_PRESENT(tp, BSSGP_IE_TLLI) || + !TLVP_PRESENT(tp, BSSGP_IE_ROUTEING_AREA)) { + LOGP(DBSSGP, LOGL_ERROR, "BSSGP BVCI=%u Rx SUSPEND " + "missing mandatory IE\n", ctx->bvci); + return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); + } + + tlli = ntohl(*(uint32_t *)TLVP_VAL(tp, BSSGP_IE_TLLI)); + + DEBUGP(DBSSGP, "BSSGP BVCI=%u TLLI=0x%08x Rx SUSPEND\n", + ctx->bvci, tlli); + + gsm48_parse_ra(&raid, TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA)); + + /* Inform GMM about the SUSPEND request */ + rc = gprs_gmm_rx_suspend(&raid, tlli); + if (rc < 0) + return bssgp_tx_suspend_nack(msgb_nsei(msg), tlli, &raid, NULL); + + bssgp_tx_suspend_ack(msgb_nsei(msg), tlli, &raid, 0); + + return 0; +} + +static int bssgp_rx_resume(struct msgb *msg, struct tlv_parsed *tp, + struct bssgp_bvc_ctx *ctx) +{ + struct bssgp_normal_hdr *bgph = + (struct bssgp_normal_hdr *) msgb_bssgph(msg); + struct gprs_ra_id raid; + uint32_t tlli; + uint8_t suspend_ref; + int rc; + + if (!TLVP_PRESENT(tp, BSSGP_IE_TLLI) || + !TLVP_PRESENT(tp, BSSGP_IE_ROUTEING_AREA) || + !TLVP_PRESENT(tp, BSSGP_IE_SUSPEND_REF_NR)) { + LOGP(DBSSGP, LOGL_ERROR, "BSSGP BVCI=%u Rx RESUME " + "missing mandatory IE\n", ctx->bvci); + return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); + } + + tlli = ntohl(*(uint32_t *)TLVP_VAL(tp, BSSGP_IE_TLLI)); + suspend_ref = *TLVP_VAL(tp, BSSGP_IE_SUSPEND_REF_NR); + + DEBUGP(DBSSGP, "BSSGP BVCI=%u TLLI=0x%08x RESUME\n", ctx->bvci, tlli); + + gsm48_parse_ra(&raid, TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA)); + + /* Inform GMM about the RESUME request */ + rc = gprs_gmm_rx_resume(&raid, tlli, suspend_ref); + if (rc < 0) + return bssgp_tx_resume_nack(msgb_nsei(msg), tlli, &raid, + NULL); + + bssgp_tx_resume_ack(msgb_nsei(msg), tlli, &raid); + return 0; +} + + +static int bssgp_rx_llc_disc(struct msgb *msg, struct tlv_parsed *tp, + struct bssgp_bvc_ctx *ctx) +{ + uint32_t tlli = 0; + + if (!TLVP_PRESENT(tp, BSSGP_IE_TLLI) || + !TLVP_PRESENT(tp, BSSGP_IE_LLC_FRAMES_DISCARDED) || + !TLVP_PRESENT(tp, BSSGP_IE_BVCI) || + !TLVP_PRESENT(tp, BSSGP_IE_NUM_OCT_AFF)) { + LOGP(DBSSGP, LOGL_ERROR, "BSSGP BVCI=%u Rx LLC DISCARDED " + "missing mandatory IE\n", ctx->bvci); + } + + if (TLVP_PRESENT(tp, BSSGP_IE_TLLI)) + tlli = ntohl(*(uint32_t *)TLVP_VAL(tp, BSSGP_IE_TLLI)); + + DEBUGP(DBSSGP, "BSSGP BVCI=%u TLLI=%08x LLC DISCARDED\n", + ctx->bvci, tlli); + + rate_ctr_inc(&ctx->ctrg->ctr[BSSGP_CTR_DISCARDED]); + + /* FIXME: send NM_LLC_DISCARDED to NM */ + return 0; +} + +static int bssgp_rx_fc_bvc(struct msgb *msg, struct tlv_parsed *tp, + struct bssgp_bvc_ctx *bctx) +{ + + DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx Flow Control BVC\n", + bctx->bvci); + + if (!TLVP_PRESENT(tp, BSSGP_IE_TAG) || + !TLVP_PRESENT(tp, BSSGP_IE_BVC_BUCKET_SIZE) || + !TLVP_PRESENT(tp, BSSGP_IE_BUCKET_LEAK_RATE) || + !TLVP_PRESENT(tp, BSSGP_IE_BMAX_DEFAULT_MS) || + !TLVP_PRESENT(tp, BSSGP_IE_R_DEFAULT_MS)) { + LOGP(DBSSGP, LOGL_ERROR, "BSSGP BVCI=%u Rx FC BVC " + "missing mandatory IE\n", bctx->bvci); + return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); + } + + /* FIXME: actually implement flow control */ + + /* Send FLOW_CONTROL_BVC_ACK */ + return bssgp_tx_fc_bvc_ack(msgb_nsei(msg), *TLVP_VAL(tp, BSSGP_IE_TAG), + msgb_bvci(msg)); +} + +/* Receive a BSSGP PDU from a BSS on a PTP BVCI */ +static int gprs_bssgp_rx_ptp(struct msgb *msg, struct tlv_parsed *tp, + struct bssgp_bvc_ctx *bctx) +{ + struct bssgp_normal_hdr *bgph = + (struct bssgp_normal_hdr *) msgb_bssgph(msg); + uint8_t pdu_type = bgph->pdu_type; + int rc = 0; + + /* If traffic is received on a BVC that is marked as blocked, the + * received PDU shall not be accepted and a STATUS PDU (Cause value: + * BVC Blocked) shall be sent to the peer entity on the signalling BVC */ + if (bctx->state & BVC_S_BLOCKED && pdu_type != BSSGP_PDUT_STATUS) { + uint16_t bvci = msgb_bvci(msg); + return bssgp_tx_status(BSSGP_CAUSE_BVCI_BLOCKED, &bvci, msg); + } + + switch (pdu_type) { + case BSSGP_PDUT_UL_UNITDATA: + /* some LLC data from the MS */ + rc = bssgp_rx_ul_ud(msg, tp, bctx); + break; + case BSSGP_PDUT_RA_CAPABILITY: + /* BSS requests RA capability or IMSI */ + DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx RA CAPABILITY UPDATE\n", + bctx->bvci); + /* FIXME: send GMM_RA_CAPABILITY_UPDATE.ind to GMM */ + /* FIXME: send RA_CAPA_UPDATE_ACK */ + break; + case BSSGP_PDUT_RADIO_STATUS: + DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx RADIO STATUS\n", bctx->bvci); + /* BSS informs us of some exception */ + /* FIXME: send GMM_RADIO_STATUS.ind to GMM */ + break; + case BSSGP_PDUT_FLOW_CONTROL_BVC: + /* BSS informs us of available bandwidth in Gb interface */ + rc = bssgp_rx_fc_bvc(msg, tp, bctx); + break; + case BSSGP_PDUT_FLOW_CONTROL_MS: + /* BSS informs us of available bandwidth to one MS */ + DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx Flow Control MS\n", + bctx->bvci); + /* FIXME: actually implement flow control */ + /* FIXME: Send FLOW_CONTROL_MS_ACK */ + break; + case BSSGP_PDUT_STATUS: + /* Some exception has occurred */ + /* FIXME: send NM_STATUS.ind to NM */ + case BSSGP_PDUT_DOWNLOAD_BSS_PFC: + case BSSGP_PDUT_CREATE_BSS_PFC_ACK: + case BSSGP_PDUT_CREATE_BSS_PFC_NACK: + case BSSGP_PDUT_MODIFY_BSS_PFC: + case BSSGP_PDUT_DELETE_BSS_PFC_ACK: + DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx PDU type 0x%02x not [yet] " + "implemented\n", bctx->bvci, pdu_type); + rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg); + break; + /* those only exist in the SGSN -> BSS direction */ + case BSSGP_PDUT_DL_UNITDATA: + case BSSGP_PDUT_PAGING_PS: + case BSSGP_PDUT_PAGING_CS: + case BSSGP_PDUT_RA_CAPA_UPDATE_ACK: + case BSSGP_PDUT_FLOW_CONTROL_BVC_ACK: + case BSSGP_PDUT_FLOW_CONTROL_MS_ACK: + DEBUGP(DBSSGP, "BSSGP BVCI=%u PDU type 0x%02x only exists " + "in DL\n", bctx->bvci, pdu_type); + bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); + rc = -EINVAL; + break; + default: + DEBUGP(DBSSGP, "BSSGP BVCI=%u PDU type 0x%02x unknown\n", + bctx->bvci, pdu_type); + rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); + break; + } + + return rc; +} + +/* Receive a BSSGP PDU from a BSS on a SIGNALLING BVCI */ +static int gprs_bssgp_rx_sign(struct msgb *msg, struct tlv_parsed *tp, + struct bssgp_bvc_ctx *bctx) +{ + struct bssgp_normal_hdr *bgph = + (struct bssgp_normal_hdr *) msgb_bssgph(msg); + uint8_t pdu_type = bgph->pdu_type; + int rc = 0; + uint16_t ns_bvci = msgb_bvci(msg); + uint16_t bvci; + + switch (bgph->pdu_type) { + case BSSGP_PDUT_SUSPEND: + /* MS wants to suspend */ + rc = bssgp_rx_suspend(msg, tp, bctx); + break; + case BSSGP_PDUT_RESUME: + /* MS wants to resume */ + rc = bssgp_rx_resume(msg, tp, bctx); + break; + case BSSGP_PDUT_FLUSH_LL_ACK: + /* BSS informs us it has performed LL FLUSH */ + DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx FLUSH LL ACK\n", bctx->bvci); + /* FIXME: send NM_FLUSH_LL.res to NM */ + break; + case BSSGP_PDUT_LLC_DISCARD: + /* BSS informs that some LLC PDU's have been discarded */ + rc = bssgp_rx_llc_disc(msg, tp, bctx); + break; + case BSSGP_PDUT_BVC_BLOCK: + /* BSS tells us that BVC shall be blocked */ + if (!TLVP_PRESENT(tp, BSSGP_IE_BVCI) || + !TLVP_PRESENT(tp, BSSGP_IE_CAUSE)) { + LOGP(DBSSGP, LOGL_ERROR, "BSSGP Rx BVC-BLOCK " + "missing mandatory IE\n"); + goto err_mand_ie; + } + rc = bssgp_rx_bvc_block(msg, tp); + break; + case BSSGP_PDUT_BVC_UNBLOCK: + /* BSS tells us that BVC shall be unblocked */ + if (!TLVP_PRESENT(tp, BSSGP_IE_BVCI)) { + LOGP(DBSSGP, LOGL_ERROR, "BSSGP Rx BVC-UNBLOCK " + "missing mandatory IE\n"); + goto err_mand_ie; + } + rc = bssgp_rx_bvc_unblock(msg, tp); + break; + case BSSGP_PDUT_BVC_RESET: + /* BSS tells us that BVC init is required */ + if (!TLVP_PRESENT(tp, BSSGP_IE_BVCI) || + !TLVP_PRESENT(tp, BSSGP_IE_CAUSE)) { + LOGP(DBSSGP, LOGL_ERROR, "BSSGP Rx BVC-RESET " + "missing mandatory IE\n"); + goto err_mand_ie; + } + rc = bssgp_rx_bvc_reset(msg, tp, ns_bvci); + break; + case BSSGP_PDUT_STATUS: + /* Some exception has occurred */ + DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx BVC STATUS\n", bctx->bvci); + /* FIXME: send NM_STATUS.ind to NM */ + break; + /* those only exist in the SGSN -> BSS direction */ + case BSSGP_PDUT_PAGING_PS: + case BSSGP_PDUT_PAGING_CS: + case BSSGP_PDUT_SUSPEND_ACK: + case BSSGP_PDUT_SUSPEND_NACK: + case BSSGP_PDUT_RESUME_ACK: + case BSSGP_PDUT_RESUME_NACK: + case BSSGP_PDUT_FLUSH_LL: + case BSSGP_PDUT_BVC_BLOCK_ACK: + case BSSGP_PDUT_BVC_UNBLOCK_ACK: + case BSSGP_PDUT_SGSN_INVOKE_TRACE: + DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx PDU type 0x%02x only exists " + "in DL\n", bctx->bvci, pdu_type); + bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); + rc = -EINVAL; + break; + default: + DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx PDU type 0x%02x unknown\n", + bctx->bvci, pdu_type); + rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); + break; + } + + return rc; +err_mand_ie: + return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); +} + +/* We expect msgb_bssgph() to point to the BSSGP header */ +int gprs_bssgp_rcvmsg(struct msgb *msg) +{ + struct bssgp_normal_hdr *bgph = + (struct bssgp_normal_hdr *) msgb_bssgph(msg); + struct bssgp_ud_hdr *budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg); + struct tlv_parsed tp; + struct bssgp_bvc_ctx *bctx; + uint8_t pdu_type = bgph->pdu_type; + uint16_t ns_bvci = msgb_bvci(msg); + int data_len; + int rc = 0; + + /* Identifiers from DOWN: NSEI, BVCI (both in msg->cb) */ + + /* UNITDATA BSSGP headers have TLLI in front */ + if (pdu_type != BSSGP_PDUT_UL_UNITDATA && + pdu_type != BSSGP_PDUT_DL_UNITDATA) { + data_len = msgb_bssgp_len(msg) - sizeof(*bgph); + rc = bssgp_tlv_parse(&tp, bgph->data, data_len); + } else { + data_len = msgb_bssgp_len(msg) - sizeof(*budh); + rc = bssgp_tlv_parse(&tp, budh->data, data_len); + } + + /* look-up or create the BTS context for this BVC */ + bctx = btsctx_by_bvci_nsei(ns_bvci, msgb_nsei(msg)); + /* Only a RESET PDU can create a new BVC context */ + if (!bctx && pdu_type != BSSGP_PDUT_BVC_RESET) { + LOGP(DBSSGP, LOGL_NOTICE, "NSEI=%u/BVCI=%u Rejecting PDU " + "type %u for unknown BVCI\n", msgb_nsei(msg), ns_bvci, + pdu_type); + return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg); + } + + if (bctx) { + log_set_context(BSC_CTX_BVC, bctx); + rate_ctr_inc(&bctx->ctrg->ctr[BSSGP_CTR_PKTS_IN]); + rate_ctr_add(&bctx->ctrg->ctr[BSSGP_CTR_BYTES_IN], + msgb_bssgp_len(msg)); + } + + if (ns_bvci == BVCI_SIGNALLING) + rc = gprs_bssgp_rx_sign(msg, &tp, bctx); + else if (ns_bvci == BVCI_PTM) + rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg); + else + rc = gprs_bssgp_rx_ptp(msg, &tp, bctx); + + return rc; +} + +/* 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 */ +int gprs_bssgp_tx_dl_ud(struct msgb *msg, struct sgsn_mm_ctx *mmctx) +{ + struct bssgp_bvc_ctx *bctx; + struct bssgp_ud_hdr *budh; + uint8_t llc_pdu_tlv_hdr_len = 2; + uint8_t *llc_pdu_tlv, *qos_profile; + uint16_t pdu_lifetime = 1000; /* centi-seconds */ + uint8_t qos_profile_default[3] = { 0x00, 0x00, 0x20 }; + uint16_t msg_len = msg->len; + uint16_t bvci = msgb_bvci(msg); + uint16_t nsei = msgb_nsei(msg); + uint16_t drx_params; + + /* Identifiers from UP: TLLI, BVCI, NSEI (all in msgb->cb) */ + if (bvci <= BVCI_PTM ) { + LOGP(DBSSGP, LOGL_ERROR, "Cannot send DL-UD to BVCI %u\n", + bvci); + return -EINVAL; + } + + bctx = btsctx_by_bvci_nsei(bvci, nsei); + if (!bctx) { + /* FIXME: don't simply create missing context, but reject message */ + bctx = btsctx_alloc(bvci, nsei); + } + + if (msg->len > TVLV_MAX_ONEBYTE) + llc_pdu_tlv_hdr_len += 1; + + /* prepend the tag and length of the LLC-PDU TLV */ + llc_pdu_tlv = msgb_push(msg, llc_pdu_tlv_hdr_len); + llc_pdu_tlv[0] = BSSGP_IE_LLC_PDU; + if (llc_pdu_tlv_hdr_len > 2) { + llc_pdu_tlv[1] = msg_len >> 8; + llc_pdu_tlv[2] = msg_len & 0xff; + } else { + llc_pdu_tlv[1] = msg_len & 0x7f; + llc_pdu_tlv[1] |= 0x80; + } + + /* FIXME: optional elements: Alignment, UTRAN CCO, LSA, PFI */ + + if (mmctx) { + /* Old TLLI to help BSS map from old->new */ +#if 0 + if (mmctx->tlli_old) + msgb_tvlv_push(msg, BSSGP_IE_TLLI, 4, htonl(*tlli_old)); +#endif + + /* IMSI */ + if (strlen(mmctx->imsi)) { + uint8_t mi[10]; + int imsi_len = gsm48_generate_mid_from_imsi(mi, mmctx->imsi); + if (imsi_len > 2) + msgb_tvlv_push(msg, BSSGP_IE_IMSI, + imsi_len-2, mi+2); + } + + /* DRX parameters */ + drx_params = htons(mmctx->drx_parms); + msgb_tvlv_push(msg, BSSGP_IE_DRX_PARAMS, 2, + (uint8_t *) &drx_params); + + /* FIXME: Priority */ + + /* MS Radio Access Capability */ + if (mmctx->ms_radio_access_capa.len) + msgb_tvlv_push(msg, BSSGP_IE_MS_RADIO_ACCESS_CAP, + mmctx->ms_radio_access_capa.len, + mmctx->ms_radio_access_capa.buf); + } + + /* prepend the pdu lifetime */ + pdu_lifetime = htons(pdu_lifetime); + msgb_tvlv_push(msg, BSSGP_IE_PDU_LIFETIME, 2, (uint8_t *)&pdu_lifetime); + + /* prepend the QoS profile, TLLI and pdu type */ + budh = (struct bssgp_ud_hdr *) msgb_push(msg, sizeof(*budh)); + memcpy(budh->qos_profile, qos_profile_default, sizeof(qos_profile_default)); + budh->tlli = htonl(msgb_tlli(msg)); + budh->pdu_type = BSSGP_PDUT_DL_UNITDATA; + + rate_ctr_inc(&bctx->ctrg->ctr[BSSGP_CTR_PKTS_OUT]); + rate_ctr_add(&bctx->ctrg->ctr[BSSGP_CTR_BYTES_OUT], msg->len); + + /* Identifiers down: BVCI, NSEI (in msgb->cb) */ + + return gprs_ns_sendmsg(bssgp_nsi, msg); +} + +/* Send a single GMM-PAGING.req to a given NSEI/NS-BVCI */ +int gprs_bssgp_tx_paging(uint16_t nsei, uint16_t ns_bvci, + struct bssgp_paging_info *pinfo) +{ + struct msgb *msg = bssgp_msgb_alloc(); + struct bssgp_normal_hdr *bgph = + (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph)); + uint16_t drx_params = htons(pinfo->drx_params); + uint8_t mi[10]; + int imsi_len = gsm48_generate_mid_from_imsi(mi, pinfo->imsi); + uint8_t ra[6]; + + if (imsi_len < 2) + return -EINVAL; + + msgb_nsei(msg) = nsei; + msgb_bvci(msg) = ns_bvci; + + if (pinfo->mode == BSSGP_PAGING_PS) + bgph->pdu_type = BSSGP_PDUT_PAGING_PS; + else + bgph->pdu_type = BSSGP_PDUT_PAGING_CS; + /* IMSI */ + msgb_tvlv_put(msg, BSSGP_IE_IMSI, imsi_len-2, mi+2); + /* DRX Parameters */ + msgb_tvlv_put(msg, BSSGP_IE_DRX_PARAMS, 2, + (uint8_t *) &drx_params); + /* Scope */ + switch (pinfo->scope) { + case BSSGP_PAGING_BSS_AREA: + { + uint8_t null = 0; + msgb_tvlv_put(msg, BSSGP_IE_BSS_AREA_ID, 1, &null); + } + break; + case BSSGP_PAGING_LOCATION_AREA: + gsm48_construct_ra(ra, &pinfo->raid); + msgb_tvlv_put(msg, BSSGP_IE_LOCATION_AREA, 4, ra); + break; + case BSSGP_PAGING_ROUTEING_AREA: + gsm48_construct_ra(ra, &pinfo->raid); + msgb_tvlv_put(msg, BSSGP_IE_ROUTEING_AREA, 6, ra); + break; + case BSSGP_PAGING_BVCI: + { + uint16_t bvci = htons(pinfo->bvci); + msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *)&bvci); + } + break; + } + /* QoS profile mandatory for PS */ + if (pinfo->mode == BSSGP_PAGING_PS) + msgb_tvlv_put(msg, BSSGP_IE_QOS_PROFILE, 3, pinfo->qos); + + /* Optional (P-)TMSI */ + if (pinfo->ptmsi) { + uint32_t ptmsi = htonl(*pinfo->ptmsi); + msgb_tvlv_put(msg, BSSGP_IE_TMSI, 4, (uint8_t *) &ptmsi); + } + + return gprs_ns_sendmsg(bssgp_nsi, msg); +} diff --git a/openbsc/src/libgb/gprs_bssgp_util.c b/openbsc/src/libgb/gprs_bssgp_util.c new file mode 100644 index 000000000..f8e3b5699 --- /dev/null +++ b/openbsc/src/libgb/gprs_bssgp_util.c @@ -0,0 +1,119 @@ +/* GPRS BSSGP protocol implementation as per 3GPP TS 08.18 */ + +/* (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 <netinet/in.h> + +#include <osmocore/msgb.h> +#include <osmocore/tlv.h> +#include <osmocore/talloc.h> + +#include <openbsc/debug.h> +#include <openbsc/gsm_data.h> +#include <openbsc/gprs_bssgp.h> +#include <openbsc/gprs_ns.h> + +struct gprs_ns_inst *bssgp_nsi; + +/* BSSGP Protocol specific, not implementation specific */ +/* FIXME: This needs to go into libosmocore after finished */ + +/* Chapter 11.3.9 / Table 11.10: Cause coding */ +static const struct value_string bssgp_cause_strings[] = { + { BSSGP_CAUSE_PROC_OVERLOAD, "Processor overload" }, + { BSSGP_CAUSE_EQUIP_FAIL, "Equipment Failure" }, + { BSSGP_CAUSE_TRASIT_NET_FAIL, "Transit netowkr service failure" }, + { BSSGP_CAUSE_CAPA_GREATER_0KPBS,"Transmission capacity modified" }, + { BSSGP_CAUSE_UNKNOWN_MS, "Unknown MS" }, + { BSSGP_CAUSE_UNKNOWN_BVCI, "Unknown BVCI" }, + { BSSGP_CAUSE_CELL_TRAF_CONG, "Cell traffic congestion" }, + { BSSGP_CAUSE_SGSN_CONG, "SGSN congestion" }, + { BSSGP_CAUSE_OML_INTERV, "O&M intervention" }, + { BSSGP_CAUSE_BVCI_BLOCKED, "BVCI blocked" }, + { BSSGP_CAUSE_PFC_CREATE_FAIL, "PFC create failure" }, + { BSSGP_CAUSE_SEM_INCORR_PDU, "Semantically incorrect PDU" }, + { BSSGP_CAUSE_INV_MAND_INF, "Invalid mandatory information" }, + { BSSGP_CAUSE_MISSING_MAND_IE, "Missing mandatory IE" }, + { BSSGP_CAUSE_MISSING_COND_IE, "Missing conditional IE" }, + { BSSGP_CAUSE_UNEXP_COND_IE, "Unexpected conditional IE" }, + { BSSGP_CAUSE_COND_IE_ERR, "Conditional IE error" }, + { BSSGP_CAUSE_PDU_INCOMP_STATE, "PDU incompatible with protocol state" }, + { BSSGP_CAUSE_PROTO_ERR_UNSPEC, "Protocol error - unspecified" }, + { BSSGP_CAUSE_PDU_INCOMP_FEAT, "PDU not compatible with feature set" }, + { 0, NULL }, +}; + +const char *bssgp_cause_str(enum gprs_bssgp_cause cause) +{ + return get_value_string(bssgp_cause_strings, cause); +} + + +struct msgb *bssgp_msgb_alloc(void) +{ + return msgb_alloc_headroom(4096, 128, "BSSGP"); +} + +/* Transmit a simple response such as BLOCK/UNBLOCK/RESET ACK/NACK */ +int bssgp_tx_simple_bvci(uint8_t pdu_type, uint16_t nsei, + uint16_t bvci, uint16_t ns_bvci) +{ + struct msgb *msg = bssgp_msgb_alloc(); + struct bssgp_normal_hdr *bgph = + (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph)); + uint16_t _bvci; + + msgb_nsei(msg) = nsei; + msgb_bvci(msg) = ns_bvci; + + bgph->pdu_type = pdu_type; + _bvci = htons(bvci); + msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *) &_bvci); + + return gprs_ns_sendmsg(bssgp_nsi, msg); +} + +/* Chapter 10.4.14: Status */ +int bssgp_tx_status(uint8_t cause, uint16_t *bvci, struct msgb *orig_msg) +{ + struct msgb *msg = bssgp_msgb_alloc(); + struct bssgp_normal_hdr *bgph = + (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph)); + + LOGP(DBSSGP, LOGL_NOTICE, "BSSGP BVCI=%u Tx STATUS, cause=%s\n", + bvci ? *bvci : 0, bssgp_cause_str(cause)); + msgb_nsei(msg) = msgb_nsei(orig_msg); + msgb_bvci(msg) = 0; + + bgph->pdu_type = BSSGP_PDUT_STATUS; + msgb_tvlv_put(msg, BSSGP_IE_CAUSE, 1, &cause); + if (bvci) { + uint16_t _bvci = htons(*bvci); + msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *) &_bvci); + } + if (orig_msg) + msgb_tvlv_put(msg, BSSGP_IE_PDU_IN_ERROR, + msgb_bssgp_len(orig_msg), msgb_bssgph(orig_msg)); + + return gprs_ns_sendmsg(bssgp_nsi, msg); +} diff --git a/openbsc/src/libgb/gprs_bssgp_vty.c b/openbsc/src/libgb/gprs_bssgp_vty.c new file mode 100644 index 000000000..9ebd09004 --- /dev/null +++ b/openbsc/src/libgb/gprs_bssgp_vty.c @@ -0,0 +1,176 @@ +/* VTY interface for our GPRS BSS Gateway Protocol (BSSGP) 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 <osmocore/msgb.h> +#include <osmocore/tlv.h> +#include <osmocore/talloc.h> +#include <osmocore/select.h> +#include <osmocore/rate_ctr.h> +#include <openbsc/debug.h> +#include <openbsc/signal.h> +#include <openbsc/gprs_ns.h> +#include <openbsc/gprs_bssgp.h> +#include <openbsc/vty.h> + +#include <osmocom/vty/vty.h> +#include <osmocom/vty/command.h> +#include <osmocom/vty/logging.h> +#include <osmocom/vty/telnet_interface.h> + +/* FIXME: this should go to some common file as it is copied + * in vty_interface.c of the BSC */ +static const struct value_string gprs_bssgp_timer_strs[] = { + { 0, NULL } +}; + +static struct cmd_node bssgp_node = { + BSSGP_NODE, + "%s(bssgp)#", + 1, +}; + +static int config_write_bssgp(struct vty *vty) +{ + vty_out(vty, "bssgp%s", VTY_NEWLINE); + + return CMD_SUCCESS; +} + +DEFUN(cfg_bssgp, cfg_bssgp_cmd, + "bssgp", + "Configure the GPRS BSS Gateway Protocol") +{ + vty->node = BSSGP_NODE; + return CMD_SUCCESS; +} + +static void dump_bvc(struct vty *vty, struct bssgp_bvc_ctx *bvc, int stats) +{ + vty_out(vty, "NSEI %5u, BVCI %5u, RA-ID: %u-%u-%u-%u, CID: %u, " + "STATE: %s%s", bvc->nsei, bvc->bvci, bvc->ra_id.mcc, + bvc->ra_id.mnc, bvc->ra_id.lac, bvc->ra_id.rac, bvc->cell_id, + bvc->state & BVC_S_BLOCKED ? "BLOCKED" : "UNBLOCKED", + VTY_NEWLINE); + if (stats) + vty_out_rate_ctr_group(vty, " ", bvc->ctrg); +} + +static void dump_bssgp(struct vty *vty, int stats) +{ + struct bssgp_bvc_ctx *bvc; + + llist_for_each_entry(bvc, &bssgp_bvc_ctxts, list) { + dump_bvc(vty, bvc, stats); + } +} + +#define BSSGP_STR "Show information about the BSSGP protocol\n" + +DEFUN(show_bssgp, show_bssgp_cmd, "show bssgp", + SHOW_STR BSSGP_STR) +{ + dump_bssgp(vty, 0); + return CMD_SUCCESS; +} + +DEFUN(show_bssgp_stats, show_bssgp_stats_cmd, "show bssgp stats", + SHOW_STR BSSGP_STR + "Include statistics\n") +{ + dump_bssgp(vty, 1); + return CMD_SUCCESS; +} + +DEFUN(show_bvc, show_bvc_cmd, "show bssgp nsei <0-65535> [stats]", + SHOW_STR BSSGP_STR + "Show all BVCs on one NSE\n" + "The NSEI\n" "Include Statistics\n") +{ + struct bssgp_bvc_ctx *bvc; + uint16_t nsei = atoi(argv[1]); + int show_stats = 0; + + if (argc >= 2) + show_stats = 1; + + llist_for_each_entry(bvc, &bssgp_bvc_ctxts, list) { + if (bvc->nsei != nsei) + continue; + dump_bvc(vty, bvc, show_stats); + } + + return CMD_SUCCESS; +} + +DEFUN(logging_fltr_bvc, + logging_fltr_bvc_cmd, + "logging filter bvc nsei <0-65535> bvci <0-65535>", + LOGGING_STR FILTER_STR + "Filter based on BSSGP Virtual Connection\n" + "NSEI of the BVC to be filtered\n" + "Network Service Entity Identifier (NSEI)\n" + "BVCI of the BVC to be filtered\n" + "BSSGP Virtual Connection Identifier (BVCI)\n") +{ + struct log_target *tgt = osmo_log_vty2tgt(vty); + struct bssgp_bvc_ctx *bvc; + uint16_t nsei = atoi(argv[0]); + uint16_t bvci = atoi(argv[1]); + + if (!tgt) + return CMD_WARNING; + + bvc = btsctx_by_bvci_nsei(bvci, nsei); + if (!bvc) { + vty_out(vty, "No BVC by that identifier%s", VTY_NEWLINE); + return CMD_WARNING; + } + + log_set_bvc_filter(tgt, bvc); + return CMD_SUCCESS; +} + +int gprs_bssgp_vty_init(void) +{ + install_element_ve(&show_bssgp_cmd); + install_element_ve(&show_bssgp_stats_cmd); + install_element_ve(&show_bvc_cmd); + install_element_ve(&logging_fltr_bvc_cmd); + + install_element(CFG_LOG_NODE, &logging_fltr_bvc_cmd); + + install_element(CONFIG_NODE, &cfg_bssgp_cmd); + install_node(&bssgp_node, config_write_bssgp); + install_default(BSSGP_NODE); + install_element(BSSGP_NODE, &ournode_exit_cmd); + install_element(BSSGP_NODE, &ournode_end_cmd); + //install_element(BSSGP_NODE, &cfg_bssgp_timer_cmd); + + return 0; +} diff --git a/openbsc/src/libgb/gprs_ns.c b/openbsc/src/libgb/gprs_ns.c new file mode 100644 index 000000000..5a8e35860 --- /dev/null +++ b/openbsc/src/libgb/gprs_ns.c @@ -0,0 +1,992 @@ +/* GPRS Networks Service (NS) messages on the Gb interfacebvci = msgb_bvci(msg); + * 3GPP TS 08.16 version 8.0.1 Release 1999 / ETSI TS 101 299 V8.0.1 (2002-05) */ + +/* (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/>. + * + */ + +/* Some introduction into NS: NS is used typically on top of frame relay, + * but in the ip.access world it is encapsulated in UDP packets. It serves + * as an intermediate shim betwen BSSGP and the underlying medium. It doesn't + * do much, apart from providing congestion notification and status indication. + * + * Terms: + * NS Network Service + * NSVC NS Virtual Connection + * NSEI NS Entity Identifier + * NSVL NS Virtual Link + * NSVLI NS Virtual Link Identifier + * BVC BSSGP Virtual Connection + * BVCI BSSGP Virtual Connection Identifier + * NSVCG NS Virtual Connection Goup + * Blocked NS-VC cannot be used for user traffic + * Alive Ability of a NS-VC to provide communication + * + * There can be multiple BSSGP virtual connections over one (group of) NSVC's. BSSGP will + * therefore identify the BSSGP virtual connection by a BVCI passed down to NS. + * NS then has to firgure out which NSVC's are responsible for this BVCI. + * Those mappings are administratively configured. + */ + +/* This implementation has the following limitations: + * o Only one NS-VC for each NSE: No load-sharing function + * o NSVCI 65535 and 65534 are reserved for internal use + * o Only UDP is supported as of now, no frame relay support + * o The IP Sub-Network-Service (SNS) as specified in 48.016 is not implemented + * o There are no BLOCK and UNBLOCK timers (yet?) + */ + +#include <stdlib.h> +#include <unistd.h> +#include <errno.h> +#include <stdint.h> + +#include <arpa/inet.h> + +#include <openbsc/gsm_data.h> +#include <osmocore/msgb.h> +#include <osmocore/tlv.h> +#include <osmocore/talloc.h> +#include <osmocore/select.h> +#include <osmocore/rate_ctr.h> +#include <openbsc/debug.h> +#include <openbsc/signal.h> +#include <openbsc/gprs_ns.h> +#include <openbsc/gprs_bssgp.h> +#include <openbsc/gprs_ns_frgre.h> +#include <openbsc/socket.h> + +static const struct tlv_definition ns_att_tlvdef = { + .def = { + [NS_IE_CAUSE] = { TLV_TYPE_TvLV, 0 }, + [NS_IE_VCI] = { TLV_TYPE_TvLV, 0 }, + [NS_IE_PDU] = { TLV_TYPE_TvLV, 0 }, + [NS_IE_BVCI] = { TLV_TYPE_TvLV, 0 }, + [NS_IE_NSEI] = { TLV_TYPE_TvLV, 0 }, + }, +}; + +enum ns_ctr { + NS_CTR_PKTS_IN, + NS_CTR_PKTS_OUT, + NS_CTR_BYTES_IN, + NS_CTR_BYTES_OUT, + NS_CTR_BLOCKED, + NS_CTR_DEAD, +}; + +static const struct rate_ctr_desc nsvc_ctr_description[] = { + { "packets.in", "Packets at NS Level ( In)" }, + { "packets.out","Packets at NS Level (Out)" }, + { "bytes.in", "Bytes at NS Level ( In)" }, + { "bytes.out", "Bytes at NS Level (Out)" }, + { "blocked", "NS-VC Block count " }, + { "dead", "NS-VC gone dead count " }, +}; + +static const struct rate_ctr_group_desc nsvc_ctrg_desc = { + .group_name_prefix = "ns.nsvc", + .group_description = "NSVC Peer Statistics", + .num_ctr = ARRAY_SIZE(nsvc_ctr_description), + .ctr_desc = nsvc_ctr_description, +}; + +/* Lookup struct gprs_nsvc based on NSVCI */ +struct gprs_nsvc *nsvc_by_nsvci(struct gprs_ns_inst *nsi, uint16_t nsvci) +{ + struct gprs_nsvc *nsvc; + llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) { + if (nsvc->nsvci == nsvci) + return nsvc; + } + return NULL; +} + +/* Lookup struct gprs_nsvc based on NSVCI */ +struct gprs_nsvc *nsvc_by_nsei(struct gprs_ns_inst *nsi, uint16_t nsei) +{ + struct gprs_nsvc *nsvc; + llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) { + if (nsvc->nsei == nsei) + return nsvc; + } + return NULL; +} + +/* Lookup struct gprs_nsvc based on remote peer socket addr */ +static struct gprs_nsvc *nsvc_by_rem_addr(struct gprs_ns_inst *nsi, + struct sockaddr_in *sin) +{ + struct gprs_nsvc *nsvc; + llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) { + if (nsvc->ip.bts_addr.sin_addr.s_addr == + sin->sin_addr.s_addr && + nsvc->ip.bts_addr.sin_port == sin->sin_port) + return nsvc; + } + return NULL; +} + +static void gprs_ns_timer_cb(void *data); + +struct gprs_nsvc *nsvc_create(struct gprs_ns_inst *nsi, uint16_t nsvci) +{ + struct gprs_nsvc *nsvc; + + LOGP(DNS, LOGL_INFO, "NSVCI=%u Creating NS-VC\n", nsvci); + + nsvc = talloc_zero(nsi, struct gprs_nsvc); + nsvc->nsvci = nsvci; + /* before RESET procedure: BLOCKED and DEAD */ + nsvc->state = NSE_S_BLOCKED; + nsvc->nsi = nsi; + nsvc->timer.cb = gprs_ns_timer_cb; + nsvc->timer.data = nsvc; + nsvc->ctrg = rate_ctr_group_alloc(nsvc, &nsvc_ctrg_desc, nsvci); + + llist_add(&nsvc->list, &nsi->gprs_nsvcs); + + return nsvc; +} + +void nsvc_delete(struct gprs_nsvc *nsvc) +{ + if (bsc_timer_pending(&nsvc->timer)) + bsc_del_timer(&nsvc->timer); + llist_del(&nsvc->list); + talloc_free(nsvc); +} + +static void ns_dispatch_signal(struct gprs_nsvc *nsvc, unsigned int signal, + uint8_t cause) +{ + struct ns_signal_data nssd; + + nssd.nsvc = nsvc; + nssd.cause = cause; + + dispatch_signal(SS_NS, signal, &nssd); +} + +/* Section 10.3.2, Table 13 */ +static const struct value_string ns_cause_str[] = { + { NS_CAUSE_TRANSIT_FAIL, "Transit network failure" }, + { NS_CAUSE_OM_INTERVENTION, "O&M intervention" }, + { NS_CAUSE_EQUIP_FAIL, "Equipment failure" }, + { NS_CAUSE_NSVC_BLOCKED, "NS-VC blocked" }, + { NS_CAUSE_NSVC_UNKNOWN, "NS-VC unknown" }, + { NS_CAUSE_BVCI_UNKNOWN, "BVCI unknown" }, + { NS_CAUSE_SEM_INCORR_PDU, "Semantically incorrect PDU" }, + { NS_CAUSE_PDU_INCOMP_PSTATE, "PDU not compatible with protocol state" }, + { NS_CAUSE_PROTO_ERR_UNSPEC, "Protocol error, unspecified" }, + { NS_CAUSE_INVAL_ESSENT_IE, "Invalid essential IE" }, + { NS_CAUSE_MISSING_ESSENT_IE, "Missing essential IE" }, + { 0, NULL } +}; + +const char *gprs_ns_cause_str(enum ns_cause cause) +{ + return get_value_string(ns_cause_str, cause); +} + +static int nsip_sendmsg(struct gprs_nsvc *nsvc, struct msgb *msg); +extern int grps_ns_frgre_sendmsg(struct gprs_nsvc *nsvc, struct msgb *msg); + +static int gprs_ns_tx(struct gprs_nsvc *nsvc, struct msgb *msg) +{ + int ret; + + log_set_context(BSC_CTX_NSVC, nsvc); + + /* Increment number of Uplink bytes */ + rate_ctr_inc(&nsvc->ctrg->ctr[NS_CTR_PKTS_OUT]); + rate_ctr_add(&nsvc->ctrg->ctr[NS_CTR_BYTES_OUT], msgb_l2len(msg)); + + switch (nsvc->ll) { + case GPRS_NS_LL_UDP: + ret = nsip_sendmsg(nsvc, msg); + break; + case GPRS_NS_LL_FR_GRE: + ret = gprs_ns_frgre_sendmsg(nsvc, msg); + break; + default: + LOGP(DNS, LOGL_ERROR, "unsupported NS linklayer %u\n", nsvc->ll); + msgb_free(msg); + ret = -EIO; + break; + } + return ret; +} + +static int gprs_ns_tx_simple(struct gprs_nsvc *nsvc, uint8_t pdu_type) +{ + struct msgb *msg = gprs_ns_msgb_alloc(); + struct gprs_ns_hdr *nsh; + + log_set_context(BSC_CTX_NSVC, nsvc); + + if (!msg) + return -ENOMEM; + + msg->l2h = msgb_put(msg, sizeof(*nsh)); + nsh = (struct gprs_ns_hdr *) msg->l2h; + + nsh->pdu_type = pdu_type; + + return gprs_ns_tx(nsvc, msg); +} + +int gprs_ns_tx_reset(struct gprs_nsvc *nsvc, uint8_t cause) +{ + struct msgb *msg = gprs_ns_msgb_alloc(); + struct gprs_ns_hdr *nsh; + uint16_t nsvci = htons(nsvc->nsvci); + uint16_t nsei = htons(nsvc->nsei); + + log_set_context(BSC_CTX_NSVC, nsvc); + + if (!msg) + return -ENOMEM; + + LOGP(DNS, LOGL_INFO, "NSEI=%u Tx NS RESET (NSVCI=%u, cause=%s)\n", + nsvc->nsei, nsvc->nsvci, gprs_ns_cause_str(cause)); + + msg->l2h = msgb_put(msg, sizeof(*nsh)); + nsh = (struct gprs_ns_hdr *) msg->l2h; + nsh->pdu_type = NS_PDUT_RESET; + + msgb_tvlv_put(msg, NS_IE_CAUSE, 1, &cause); + msgb_tvlv_put(msg, NS_IE_VCI, 2, (uint8_t *) &nsvci); + msgb_tvlv_put(msg, NS_IE_NSEI, 2, (uint8_t *) &nsei); + + return gprs_ns_tx(nsvc, msg); + +} + +int gprs_ns_tx_status(struct gprs_nsvc *nsvc, uint8_t cause, + uint16_t bvci, struct msgb *orig_msg) +{ + struct msgb *msg = gprs_ns_msgb_alloc(); + struct gprs_ns_hdr *nsh; + uint16_t nsvci = htons(nsvc->nsvci); + + log_set_context(BSC_CTX_NSVC, nsvc); + + bvci = htons(bvci); + + if (!msg) + return -ENOMEM; + + LOGP(DNS, LOGL_NOTICE, "NSEI=%u Tx NS STATUS (NSVCI=%u, cause=%s)\n", + nsvc->nsei, nsvc->nsvci, gprs_ns_cause_str(cause)); + + msg->l2h = msgb_put(msg, sizeof(*nsh)); + nsh = (struct gprs_ns_hdr *) msg->l2h; + nsh->pdu_type = NS_PDUT_STATUS; + + msgb_tvlv_put(msg, NS_IE_CAUSE, 1, &cause); + + /* Section 9.2.7.1: Static conditions for NS-VCI */ + if (cause == NS_CAUSE_NSVC_BLOCKED || + cause == NS_CAUSE_NSVC_UNKNOWN) + msgb_tvlv_put(msg, NS_IE_VCI, 2, (uint8_t *)&nsvci); + + /* Section 9.2.7.2: Static conditions for NS PDU */ + switch (cause) { + case NS_CAUSE_SEM_INCORR_PDU: + case NS_CAUSE_PDU_INCOMP_PSTATE: + case NS_CAUSE_PROTO_ERR_UNSPEC: + case NS_CAUSE_INVAL_ESSENT_IE: + case NS_CAUSE_MISSING_ESSENT_IE: + msgb_tvlv_put(msg, NS_IE_PDU, msgb_l2len(orig_msg), + orig_msg->l2h); + break; + default: + break; + } + + /* Section 9.2.7.3: Static conditions for BVCI */ + if (cause == NS_CAUSE_BVCI_UNKNOWN) + msgb_tvlv_put(msg, NS_IE_VCI, 2, (uint8_t *)&bvci); + + return gprs_ns_tx(nsvc, msg); +} + +int gprs_ns_tx_block(struct gprs_nsvc *nsvc, uint8_t cause) +{ + struct msgb *msg = gprs_ns_msgb_alloc(); + struct gprs_ns_hdr *nsh; + uint16_t nsvci = htons(nsvc->nsvci); + + log_set_context(BSC_CTX_NSVC, nsvc); + + if (!msg) + return -ENOMEM; + + LOGP(DNS, LOGL_INFO, "NSEI=%u Tx NS BLOCK (NSVCI=%u, cause=%s)\n", + nsvc->nsei, nsvc->nsvci, gprs_ns_cause_str(cause)); + + /* be conservative and mark it as blocked even now! */ + nsvc->state |= NSE_S_BLOCKED; + rate_ctr_inc(&nsvc->ctrg->ctr[NS_CTR_BLOCKED]); + + msg->l2h = msgb_put(msg, sizeof(*nsh)); + nsh = (struct gprs_ns_hdr *) msg->l2h; + nsh->pdu_type = NS_PDUT_BLOCK; + + msgb_tvlv_put(msg, NS_IE_CAUSE, 1, &cause); + msgb_tvlv_put(msg, NS_IE_VCI, 2, (uint8_t *) &nsvci); + + return gprs_ns_tx(nsvc, msg); +} + +int gprs_ns_tx_unblock(struct gprs_nsvc *nsvc) +{ + log_set_context(BSC_CTX_NSVC, nsvc); + LOGP(DNS, LOGL_INFO, "NSEI=%u Tx NS UNBLOCK (NSVCI=%u)\n", + nsvc->nsei, nsvc->nsvci); + + return gprs_ns_tx_simple(nsvc, NS_PDUT_UNBLOCK); +} + +int gprs_ns_tx_alive(struct gprs_nsvc *nsvc) +{ + log_set_context(BSC_CTX_NSVC, nsvc); + LOGP(DNS, LOGL_DEBUG, "NSEI=%u Tx NS ALIVE (NSVCI=%u)\n", + nsvc->nsei, nsvc->nsvci); + + return gprs_ns_tx_simple(nsvc, NS_PDUT_ALIVE); +} + +int gprs_ns_tx_alive_ack(struct gprs_nsvc *nsvc) +{ + log_set_context(BSC_CTX_NSVC, nsvc); + LOGP(DNS, LOGL_DEBUG, "NSEI=%u Tx NS ALIVE_ACK (NSVCI=%u)\n", + nsvc->nsei, nsvc->nsvci); + + return gprs_ns_tx_simple(nsvc, NS_PDUT_ALIVE_ACK); +} + +static const enum ns_timeout timer_mode_tout[_NSVC_TIMER_NR] = { + [NSVC_TIMER_TNS_RESET] = NS_TOUT_TNS_RESET, + [NSVC_TIMER_TNS_ALIVE] = NS_TOUT_TNS_ALIVE, + [NSVC_TIMER_TNS_TEST] = NS_TOUT_TNS_TEST, +}; + +static const struct value_string timer_mode_strs[] = { + { NSVC_TIMER_TNS_RESET, "tns-reset" }, + { NSVC_TIMER_TNS_ALIVE, "tns-alive" }, + { NSVC_TIMER_TNS_TEST, "tns-test" }, + { 0, NULL } +}; + +static void nsvc_start_timer(struct gprs_nsvc *nsvc, enum nsvc_timer_mode mode) +{ + enum ns_timeout tout = timer_mode_tout[mode]; + unsigned int seconds = nsvc->nsi->timeout[tout]; + + log_set_context(BSC_CTX_NSVC, nsvc); + DEBUGP(DNS, "NSEI=%u Starting timer in mode %s (%u seconds)\n", + nsvc->nsei, get_value_string(timer_mode_strs, mode), + seconds); + + if (bsc_timer_pending(&nsvc->timer)) + bsc_del_timer(&nsvc->timer); + + nsvc->timer_mode = mode; + bsc_schedule_timer(&nsvc->timer, seconds, 0); +} + +static void gprs_ns_timer_cb(void *data) +{ + struct gprs_nsvc *nsvc = data; + enum ns_timeout tout = timer_mode_tout[nsvc->timer_mode]; + unsigned int seconds = nsvc->nsi->timeout[tout]; + + log_set_context(BSC_CTX_NSVC, nsvc); + DEBUGP(DNS, "NSEI=%u Timer expired in mode %s (%u seconds)\n", + nsvc->nsei, get_value_string(timer_mode_strs, nsvc->timer_mode), + seconds); + + switch (nsvc->timer_mode) { + case NSVC_TIMER_TNS_ALIVE: + /* Tns-alive case: we expired without response ! */ + nsvc->alive_retries++; + if (nsvc->alive_retries > + nsvc->nsi->timeout[NS_TOUT_TNS_ALIVE_RETRIES]) { + /* mark as dead and blocked */ + nsvc->state = NSE_S_BLOCKED; + rate_ctr_inc(&nsvc->ctrg->ctr[NS_CTR_BLOCKED]); + rate_ctr_inc(&nsvc->ctrg->ctr[NS_CTR_DEAD]); + LOGP(DNS, LOGL_NOTICE, + "NSEI=%u Tns-alive expired more then " + "%u times, blocking NS-VC\n", nsvc->nsei, + nsvc->nsi->timeout[NS_TOUT_TNS_ALIVE_RETRIES]); + ns_dispatch_signal(nsvc, S_NS_ALIVE_EXP, 0); + ns_dispatch_signal(nsvc, S_NS_BLOCK, NS_CAUSE_NSVC_BLOCKED); + return; + } + /* Tns-test case: send NS-ALIVE PDU */ + gprs_ns_tx_alive(nsvc); + /* start Tns-alive timer */ + nsvc_start_timer(nsvc, NSVC_TIMER_TNS_ALIVE); + break; + case NSVC_TIMER_TNS_TEST: + /* Tns-test case: send NS-ALIVE PDU */ + gprs_ns_tx_alive(nsvc); + /* start Tns-alive timer (transition into faster + * alive retransmissions) */ + nsvc->alive_retries = 0; + nsvc_start_timer(nsvc, NSVC_TIMER_TNS_ALIVE); + break; + case NSVC_TIMER_TNS_RESET: + /* Chapter 7.3: Re-send the RESET */ + gprs_ns_tx_reset(nsvc, NS_CAUSE_OM_INTERVENTION); + /* Re-start Tns-reset timer */ + nsvc_start_timer(nsvc, NSVC_TIMER_TNS_RESET); + break; + case _NSVC_TIMER_NR: + break; + } +} + +/* Section 9.2.6 */ +static int gprs_ns_tx_reset_ack(struct gprs_nsvc *nsvc) +{ + struct msgb *msg = gprs_ns_msgb_alloc(); + struct gprs_ns_hdr *nsh; + uint16_t nsvci, nsei; + + log_set_context(BSC_CTX_NSVC, nsvc); + if (!msg) + return -ENOMEM; + + nsvci = htons(nsvc->nsvci); + nsei = htons(nsvc->nsei); + + msg->l2h = msgb_put(msg, sizeof(*nsh)); + nsh = (struct gprs_ns_hdr *) msg->l2h; + + nsh->pdu_type = NS_PDUT_RESET_ACK; + + LOGP(DNS, LOGL_INFO, "NSEI=%u Tx NS RESET ACK (NSVCI=%u)\n", + nsvc->nsei, nsvc->nsvci); + + msgb_tvlv_put(msg, NS_IE_VCI, 2, (uint8_t *)&nsvci); + msgb_tvlv_put(msg, NS_IE_NSEI, 2, (uint8_t *)&nsei); + + return gprs_ns_tx(nsvc, msg); +} + +/* Section 9.2.10: transmit side / NS-UNITDATA-REQUEST primitive */ +int gprs_ns_sendmsg(struct gprs_ns_inst *nsi, struct msgb *msg) +{ + struct gprs_nsvc *nsvc; + struct gprs_ns_hdr *nsh; + uint16_t bvci = msgb_bvci(msg); + + nsvc = nsvc_by_nsei(nsi, msgb_nsei(msg)); + if (!nsvc) { + LOGP(DNS, LOGL_ERROR, "Unable to resolve NSEI %u " + "to NS-VC!\n", msgb_nsei(msg)); + msgb_free(msg); + return -EINVAL; + } + log_set_context(BSC_CTX_NSVC, nsvc); + + if (!(nsvc->state & NSE_S_ALIVE)) { + LOGP(DNS, LOGL_ERROR, "NSEI=%u is not alive, cannot send\n", + nsvc->nsei); + msgb_free(msg); + return -EBUSY; + } + if (nsvc->state & NSE_S_BLOCKED) { + LOGP(DNS, LOGL_ERROR, "NSEI=%u is blocked, cannot send\n", + nsvc->nsei); + msgb_free(msg); + return -EBUSY; + } + + msg->l2h = msgb_push(msg, sizeof(*nsh) + 3); + nsh = (struct gprs_ns_hdr *) msg->l2h; + if (!nsh) { + LOGP(DNS, LOGL_ERROR, "Not enough headroom for NS header\n"); + msgb_free(msg); + return -EIO; + } + + nsh->pdu_type = NS_PDUT_UNITDATA; + /* spare octet in data[0] */ + nsh->data[1] = bvci >> 8; + nsh->data[2] = bvci & 0xff; + + return gprs_ns_tx(nsvc, msg); +} + +/* Section 9.2.10: receive side */ +static int gprs_ns_rx_unitdata(struct gprs_nsvc *nsvc, struct msgb *msg) +{ + struct gprs_ns_hdr *nsh = (struct gprs_ns_hdr *)msg->l2h; + uint16_t bvci; + + if (nsvc->state & NSE_S_BLOCKED) + return gprs_ns_tx_status(nsvc, NS_CAUSE_NSVC_BLOCKED, + 0, msg); + + /* spare octet in data[0] */ + bvci = nsh->data[1] << 8 | nsh->data[2]; + msgb_bssgph(msg) = &nsh->data[3]; + msgb_bvci(msg) = bvci; + + /* call upper layer (BSSGP) */ + return nsvc->nsi->cb(GPRS_NS_EVT_UNIT_DATA, nsvc, msg, bvci); +} + +/* Section 9.2.7 */ +static int gprs_ns_rx_status(struct gprs_nsvc *nsvc, struct msgb *msg) +{ + struct gprs_ns_hdr *nsh = (struct gprs_ns_hdr *) msg->l2h; + struct tlv_parsed tp; + uint8_t cause; + int rc; + + LOGP(DNS, LOGL_NOTICE, "NSEI=%u Rx NS STATUS ", nsvc->nsei); + + rc = tlv_parse(&tp, &ns_att_tlvdef, nsh->data, + msgb_l2len(msg) - sizeof(*nsh), 0, 0); + if (rc < 0) { + LOGPC(DNS, LOGL_NOTICE, "Error during TLV Parse\n"); + LOGP(DNS, LOGL_ERROR, "NSEI=%u Rx NS STATUS: " + "Error during TLV Parse\n", nsvc->nsei); + return rc; + } + + if (!TLVP_PRESENT(&tp, NS_IE_CAUSE)) { + LOGPC(DNS, LOGL_INFO, "missing cause IE\n"); + return -EINVAL; + } + + cause = *TLVP_VAL(&tp, NS_IE_CAUSE); + LOGPC(DNS, LOGL_NOTICE, "cause=%s\n", gprs_ns_cause_str(cause)); + + return 0; +} + +/* Section 7.3 */ +static int gprs_ns_rx_reset(struct gprs_nsvc *nsvc, struct msgb *msg) +{ + struct gprs_ns_hdr *nsh = (struct gprs_ns_hdr *) msg->l2h; + struct tlv_parsed tp; + uint8_t *cause; + uint16_t *nsvci, *nsei; + int rc; + + rc = tlv_parse(&tp, &ns_att_tlvdef, nsh->data, + msgb_l2len(msg) - sizeof(*nsh), 0, 0); + if (rc < 0) { + LOGP(DNS, LOGL_ERROR, "NSEI=%u Rx NS RESET " + "Error during TLV Parse\n", nsvc->nsei); + return rc; + } + + if (!TLVP_PRESENT(&tp, NS_IE_CAUSE) || + !TLVP_PRESENT(&tp, NS_IE_VCI) || + !TLVP_PRESENT(&tp, NS_IE_NSEI)) { + LOGP(DNS, LOGL_ERROR, "NS RESET Missing mandatory IE\n"); + gprs_ns_tx_status(nsvc, NS_CAUSE_MISSING_ESSENT_IE, 0, msg); + return -EINVAL; + } + + cause = (uint8_t *) TLVP_VAL(&tp, NS_IE_CAUSE); + nsvci = (uint16_t *) TLVP_VAL(&tp, NS_IE_VCI); + nsei = (uint16_t *) TLVP_VAL(&tp, NS_IE_NSEI); + + LOGP(DNS, LOGL_INFO, "NSEI=%u Rx NS RESET (NSVCI=%u, cause=%s)\n", + nsvc->nsvci, nsvc->nsei, gprs_ns_cause_str(*cause)); + + /* Mark NS-VC as blocked and alive */ + nsvc->state = NSE_S_BLOCKED | NSE_S_ALIVE; + + nsvc->nsei = ntohs(*nsei); + nsvc->nsvci = ntohs(*nsvci); + + /* start the test procedure */ + gprs_ns_tx_simple(nsvc, NS_PDUT_ALIVE); + nsvc_start_timer(nsvc, NSVC_TIMER_TNS_TEST); + + /* inform interested parties about the fact that this NSVC + * has received RESET */ + ns_dispatch_signal(nsvc, S_NS_RESET, *cause); + + return gprs_ns_tx_reset_ack(nsvc); +} + +static int gprs_ns_rx_block(struct gprs_nsvc *nsvc, struct msgb *msg) +{ + struct gprs_ns_hdr *nsh = (struct gprs_ns_hdr *) msg->l2h; + struct tlv_parsed tp; + uint8_t *cause; + int rc; + + LOGP(DNS, LOGL_INFO, "NSEI=%u Rx NS BLOCK\n", nsvc->nsei); + + nsvc->state |= NSE_S_BLOCKED; + + rc = tlv_parse(&tp, &ns_att_tlvdef, nsh->data, + msgb_l2len(msg) - sizeof(*nsh), 0, 0); + if (rc < 0) { + LOGP(DNS, LOGL_ERROR, "NSEI=%u Rx NS BLOCK " + "Error during TLV Parse\n", nsvc->nsei); + return rc; + } + + if (!TLVP_PRESENT(&tp, NS_IE_CAUSE) || + !TLVP_PRESENT(&tp, NS_IE_VCI)) { + LOGP(DNS, LOGL_ERROR, "NS RESET Missing mandatory IE\n"); + gprs_ns_tx_status(nsvc, NS_CAUSE_MISSING_ESSENT_IE, 0, msg); + return -EINVAL; + } + + cause = (uint8_t *) TLVP_VAL(&tp, NS_IE_CAUSE); + //nsvci = (uint16_t *) TLVP_VAL(&tp, NS_IE_VCI); + + ns_dispatch_signal(nsvc, S_NS_BLOCK, *cause); + rate_ctr_inc(&nsvc->ctrg->ctr[NS_CTR_BLOCKED]); + + return gprs_ns_tx_simple(nsvc, NS_PDUT_BLOCK_ACK); +} + +/* main entry point, here incoming NS frames enter */ +int gprs_ns_rcvmsg(struct gprs_ns_inst *nsi, struct msgb *msg, + struct sockaddr_in *saddr, enum gprs_ns_ll ll) +{ + struct gprs_ns_hdr *nsh = (struct gprs_ns_hdr *) msg->l2h; + struct gprs_nsvc *nsvc; + int rc = 0; + + /* look up the NSVC based on source address */ + nsvc = nsvc_by_rem_addr(nsi, saddr); + if (!nsvc) { + struct tlv_parsed tp; + uint16_t nsei; + if (nsh->pdu_type == NS_PDUT_STATUS) { + LOGP(DNS, LOGL_INFO, "Ignoring NS STATUS from %s:%u " + "for non-existing NS-VC\n", + inet_ntoa(saddr->sin_addr), ntohs(saddr->sin_port)); + return 0; + } + /* Only the RESET procedure creates a new NSVC */ + if (nsh->pdu_type != NS_PDUT_RESET) { + /* Since we have no NSVC, we have to use a fake */ + nsvc = nsi->unknown_nsvc; + log_set_context(BSC_CTX_NSVC, nsvc); + LOGP(DNS, LOGL_INFO, "Rejecting NS PDU type 0x%0x " + "from %s:%u for non-existing NS-VC\n", + nsh->pdu_type, inet_ntoa(saddr->sin_addr), + ntohs(saddr->sin_port)); + nsvc->nsvci = nsvc->nsei = 0xfffe; + nsvc->ip.bts_addr = *saddr; + nsvc->state = NSE_S_ALIVE; + nsvc->ll = ll; +#if 0 + return gprs_ns_tx_reset(nsvc, NS_CAUSE_PDU_INCOMP_PSTATE); +#else + return gprs_ns_tx_status(nsvc, + NS_CAUSE_PDU_INCOMP_PSTATE, 0, + msg); +#endif + } + rc = tlv_parse(&tp, &ns_att_tlvdef, nsh->data, + msgb_l2len(msg) - sizeof(*nsh), 0, 0); + if (rc < 0) { + LOGP(DNS, LOGL_ERROR, "Rx NS RESET Error %d during " + "TLV Parse\n", rc); + return rc; + } + if (!TLVP_PRESENT(&tp, NS_IE_CAUSE) || + !TLVP_PRESENT(&tp, NS_IE_VCI) || + !TLVP_PRESENT(&tp, NS_IE_NSEI)) { + LOGP(DNS, LOGL_ERROR, "NS RESET Missing mandatory IE\n"); + gprs_ns_tx_status(nsvc, NS_CAUSE_MISSING_ESSENT_IE, 0, + msg); + return -EINVAL; + } + nsei = ntohs(*(uint16_t *)TLVP_VAL(&tp, NS_IE_NSEI)); + /* Check if we already know this NSEI, the remote end might + * simply have changed addresses, or it is a SGSN */ + nsvc = nsvc_by_nsei(nsi, nsei); + if (!nsvc) { + nsvc = nsvc_create(nsi, 0xffff); + nsvc->ll = ll; + log_set_context(BSC_CTX_NSVC, nsvc); + LOGP(DNS, LOGL_INFO, "Creating NS-VC for BSS at %s:%u\n", + inet_ntoa(saddr->sin_addr), ntohs(saddr->sin_port)); + } + /* Update the remote peer IP address/port */ + nsvc->ip.bts_addr = *saddr; + } else + msgb_nsei(msg) = nsvc->nsei; + + log_set_context(BSC_CTX_NSVC, nsvc); + + /* Increment number of Incoming bytes */ + rate_ctr_inc(&nsvc->ctrg->ctr[NS_CTR_PKTS_IN]); + rate_ctr_add(&nsvc->ctrg->ctr[NS_CTR_BYTES_IN], msgb_l2len(msg)); + + switch (nsh->pdu_type) { + case NS_PDUT_ALIVE: + /* If we're dead and blocked and suddenly receive a + * NS-ALIVE out of the blue, we might have been re-started + * and should send a NS-RESET to make sure everything recovers + * fine. */ + if (nsvc->state == NSE_S_BLOCKED) + rc = gprs_ns_tx_reset(nsvc, NS_CAUSE_PDU_INCOMP_PSTATE); + else + rc = gprs_ns_tx_alive_ack(nsvc); + break; + case NS_PDUT_ALIVE_ACK: + /* stop Tns-alive and start Tns-test */ + nsvc_start_timer(nsvc, NSVC_TIMER_TNS_TEST); + if (nsvc->remote_end_is_sgsn) { + /* FIXME: this should be one level higher */ + if (nsvc->state & NSE_S_BLOCKED) + rc = gprs_ns_tx_unblock(nsvc); + } + break; + case NS_PDUT_UNITDATA: + /* actual user data */ + rc = gprs_ns_rx_unitdata(nsvc, msg); + break; + case NS_PDUT_STATUS: + rc = gprs_ns_rx_status(nsvc, msg); + break; + case NS_PDUT_RESET: + rc = gprs_ns_rx_reset(nsvc, msg); + break; + case NS_PDUT_RESET_ACK: + LOGP(DNS, LOGL_INFO, "NSEI=%u Rx NS RESET ACK\n", nsvc->nsei); + /* mark NS-VC as blocked + active */ + nsvc->state = NSE_S_BLOCKED | NSE_S_ALIVE; + nsvc->remote_state = NSE_S_BLOCKED | NSE_S_ALIVE; + rate_ctr_inc(&nsvc->ctrg->ctr[NS_CTR_BLOCKED]); + if (nsvc->persistent || nsvc->remote_end_is_sgsn) { + /* stop RESET timer */ + bsc_del_timer(&nsvc->timer); + } + /* Initiate TEST proc.: Send ALIVE and start timer */ + rc = gprs_ns_tx_simple(nsvc, NS_PDUT_ALIVE); + nsvc_start_timer(nsvc, NSVC_TIMER_TNS_TEST); + break; + case NS_PDUT_UNBLOCK: + /* Section 7.2: unblocking procedure */ + LOGP(DNS, LOGL_INFO, "NSEI=%u Rx NS UNBLOCK\n", nsvc->nsei); + nsvc->state &= ~NSE_S_BLOCKED; + ns_dispatch_signal(nsvc, S_NS_UNBLOCK, 0); + rc = gprs_ns_tx_simple(nsvc, NS_PDUT_UNBLOCK_ACK); + break; + case NS_PDUT_UNBLOCK_ACK: + LOGP(DNS, LOGL_INFO, "NSEI=%u Rx NS UNBLOCK ACK\n", nsvc->nsei); + /* mark NS-VC as unblocked + active */ + nsvc->state = NSE_S_ALIVE; + nsvc->remote_state = NSE_S_ALIVE; + ns_dispatch_signal(nsvc, S_NS_UNBLOCK, 0); + break; + case NS_PDUT_BLOCK: + rc = gprs_ns_rx_block(nsvc, msg); + break; + case NS_PDUT_BLOCK_ACK: + LOGP(DNS, LOGL_INFO, "NSEI=%u Rx NS BLOCK ACK\n", nsvc->nsei); + /* mark remote NS-VC as blocked + active */ + nsvc->remote_state = NSE_S_BLOCKED | NSE_S_ALIVE; + break; + default: + LOGP(DNS, LOGL_NOTICE, "NSEI=%u Rx Unknown NS PDU type 0x%02x\n", + nsvc->nsei, nsh->pdu_type); + rc = -EINVAL; + break; + } + return rc; +} + +struct gprs_ns_inst *gprs_ns_instantiate(gprs_ns_cb_t *cb) +{ + struct gprs_ns_inst *nsi = talloc_zero(tall_bsc_ctx, struct gprs_ns_inst); + + nsi->cb = cb; + INIT_LLIST_HEAD(&nsi->gprs_nsvcs); + nsi->timeout[NS_TOUT_TNS_BLOCK] = 3; + nsi->timeout[NS_TOUT_TNS_BLOCK_RETRIES] = 3; + nsi->timeout[NS_TOUT_TNS_RESET] = 3; + nsi->timeout[NS_TOUT_TNS_RESET_RETRIES] = 3; + nsi->timeout[NS_TOUT_TNS_TEST] = 30; + nsi->timeout[NS_TOUT_TNS_ALIVE] = 3; + nsi->timeout[NS_TOUT_TNS_ALIVE_RETRIES] = 10; + + /* Create the dummy NSVC that we use for sending + * messages to non-existant/unknown NS-VC's */ + nsi->unknown_nsvc = nsvc_create(nsi, 0xfffe); + llist_del(&nsi->unknown_nsvc->list); + + return nsi; +} + +void gprs_ns_destroy(struct gprs_ns_inst *nsi) +{ + /* FIXME: clear all timers */ + + /* recursively free the NSI and all its NSVCs */ + talloc_free(nsi); +} + + +/* NS-over-IP code, according to 3GPP TS 48.016 Chapter 6.2 + * We don't support Size Procedure, Configuration Procedure, ChangeWeight Procedure */ + +/* Read a single NS-over-IP message */ +static struct msgb *read_nsip_msg(struct bsc_fd *bfd, int *error, + struct sockaddr_in *saddr) +{ + struct msgb *msg = gprs_ns_msgb_alloc(); + int ret = 0; + socklen_t saddr_len = sizeof(*saddr); + + if (!msg) { + *error = -ENOMEM; + return NULL; + } + + ret = recvfrom(bfd->fd, msg->data, NS_ALLOC_SIZE - NS_ALLOC_HEADROOM, 0, + (struct sockaddr *)saddr, &saddr_len); + if (ret < 0) { + LOGP(DNS, LOGL_ERROR, "recv error %s during NSIP recv\n", + strerror(errno)); + msgb_free(msg); + *error = ret; + return NULL; + } else if (ret == 0) { + msgb_free(msg); + *error = ret; + return NULL; + } + + msg->l2h = msg->data; + msgb_put(msg, ret); + + return msg; +} + +static int handle_nsip_read(struct bsc_fd *bfd) +{ + int error; + struct sockaddr_in saddr; + struct gprs_ns_inst *nsi = bfd->data; + struct msgb *msg = read_nsip_msg(bfd, &error, &saddr); + + if (!msg) + return error; + + error = gprs_ns_rcvmsg(nsi, msg, &saddr, GPRS_NS_LL_UDP); + + msgb_free(msg); + + return error; +} + +static int handle_nsip_write(struct bsc_fd *bfd) +{ + /* FIXME: actually send the data here instead of nsip_sendmsg() */ + return -EIO; +} + +static int nsip_sendmsg(struct gprs_nsvc *nsvc, struct msgb *msg) +{ + int rc; + struct gprs_ns_inst *nsi = nsvc->nsi; + struct sockaddr_in *daddr = &nsvc->ip.bts_addr; + + rc = sendto(nsi->nsip.fd.fd, msg->data, msg->len, 0, + (struct sockaddr *)daddr, sizeof(*daddr)); + + talloc_free(msg); + + return rc; +} + +/* UDP Port 23000 carries the LLC-in-BSSGP-in-NS protocol stack */ +static int nsip_fd_cb(struct bsc_fd *bfd, unsigned int what) +{ + int rc = 0; + + if (what & BSC_FD_READ) + rc = handle_nsip_read(bfd); + if (what & BSC_FD_WRITE) + rc = handle_nsip_write(bfd); + + return rc; +} + +/* Listen for incoming GPRS packets */ +int gprs_ns_nsip_listen(struct gprs_ns_inst *nsi) +{ + int ret; + + ret = make_sock(&nsi->nsip.fd, IPPROTO_UDP, nsi->nsip.local_ip, + nsi->nsip.local_port, nsip_fd_cb); + if (ret < 0) + return ret; + + nsi->nsip.fd.data = nsi; + + return ret; +} + +/* Initiate a RESET procedure */ +void gprs_nsvc_reset(struct gprs_nsvc *nsvc, uint8_t cause) +{ + LOGP(DNS, LOGL_INFO, "NSEI=%u RESET procedure based on API request\n", + nsvc->nsei); + + /* Mark NS-VC locally as blocked and dead */ + nsvc->state = NSE_S_BLOCKED; + /* Send NS-RESET PDU */ + if (gprs_ns_tx_reset(nsvc, cause) < 0) { + LOGP(DNS, LOGL_ERROR, "NSEI=%u, error resetting NS-VC\n", + nsvc->nsei); + } + /* Start Tns-reset */ + nsvc_start_timer(nsvc, NSVC_TIMER_TNS_RESET); +} + +/* Establish a connection (from the BSS) to the SGSN */ +struct gprs_nsvc *nsip_connect(struct gprs_ns_inst *nsi, + struct sockaddr_in *dest, uint16_t nsei, + uint16_t nsvci) +{ + struct gprs_nsvc *nsvc; + + nsvc = nsvc_by_rem_addr(nsi, dest); + if (!nsvc) + nsvc = nsvc_create(nsi, nsvci); + nsvc->ip.bts_addr = *dest; + nsvc->nsei = nsei; + nsvc->nsvci = nsvci; + nsvc->remote_end_is_sgsn = 1; + + gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION); + return nsvc; +} diff --git a/openbsc/src/libgb/gprs_ns_frgre.c b/openbsc/src/libgb/gprs_ns_frgre.c new file mode 100644 index 000000000..106f410e6 --- /dev/null +++ b/openbsc/src/libgb/gprs_ns_frgre.c @@ -0,0 +1,304 @@ +/* GPRS Networks Service (NS) messages on the Gb interface + * 3GPP TS 08.16 version 8.0.1 Release 1999 / ETSI TS 101 299 V8.0.1 (2002-05) */ + +/* NS-over-FR-over-GRE implementation */ + +/* (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 <string.h> +#include <unistd.h> + +#include <sys/socket.h> +#include <netinet/in.h> +#include <netinet/ip.h> +#include <arpa/inet.h> + +#include <osmocore/select.h> +#include <osmocore/msgb.h> +#include <osmocore/talloc.h> + +#include <openbsc/socket.h> +#include <openbsc/debug.h> +#include <openbsc/gprs_ns.h> + +#define GRE_PTYPE_FR 0x6559 +#define GRE_PTYPE_IPv4 0x0800 +#define GRE_PTYPE_KAR 0x0000 /* keepalive response */ + +struct gre_hdr { + uint16_t flags; + uint16_t ptype; +} __attribute__ ((packed)); + +/* IPv4 messages inside the GRE tunnel might be GRE keepalives */ +static int handle_rx_gre_ipv4(struct bsc_fd *bfd, struct msgb *msg, + struct iphdr *iph, struct gre_hdr *greh) +{ + struct gprs_ns_inst *nsi = bfd->data; + int gre_payload_len; + struct iphdr *inner_iph; + struct gre_hdr *inner_greh; + struct sockaddr_in daddr; + struct in_addr ia; + + gre_payload_len = msg->len - (iph->ihl*4 + sizeof(*greh)); + + inner_iph = (struct iphdr *) ((uint8_t *)greh + sizeof(*greh)); + + if (gre_payload_len < inner_iph->ihl*4 + sizeof(*inner_greh)) { + LOGP(DNS, LOGL_ERROR, "GRE keepalive too short\n"); + return -EIO; + } + + if (inner_iph->saddr != iph->daddr || + inner_iph->daddr != iph->saddr) { + LOGP(DNS, LOGL_ERROR, + "GRE keepalive with wrong tunnel addresses\n"); + return -EIO; + } + + if (inner_iph->protocol != IPPROTO_GRE) { + LOGP(DNS, LOGL_ERROR, "GRE keepalive with wrong protocol\n"); + return -EIO; + } + + inner_greh = (struct gre_hdr *) ((uint8_t *)inner_iph + iph->ihl*4); + if (inner_greh->ptype != htons(GRE_PTYPE_KAR)) { + LOGP(DNS, LOGL_ERROR, "GRE keepalive inner GRE type != 0\n"); + return -EIO; + } + + /* Actually send the response back */ + + daddr.sin_family = AF_INET; + daddr.sin_addr.s_addr = inner_iph->daddr; + daddr.sin_port = IPPROTO_GRE; + + ia.s_addr = iph->saddr; + LOGP(DNS, LOGL_DEBUG, "GRE keepalive from %s, responding\n", + inet_ntoa(ia)); + + return sendto(nsi->frgre.fd.fd, inner_greh, + gre_payload_len - inner_iph->ihl*4, 0, + (struct sockaddr *)&daddr, sizeof(daddr)); +} + +static struct msgb *read_nsfrgre_msg(struct bsc_fd *bfd, int *error, + struct sockaddr_in *saddr) +{ + struct msgb *msg = msgb_alloc(NS_ALLOC_SIZE, "Gb/NS/FR/GRE Rx"); + int ret = 0; + socklen_t saddr_len = sizeof(*saddr); + struct iphdr *iph; + struct gre_hdr *greh; + uint8_t *frh; + uint16_t dlci; + + if (!msg) { + *error = -ENOMEM; + return NULL; + } + + ret = recvfrom(bfd->fd, msg->data, NS_ALLOC_SIZE, 0, + (struct sockaddr *)saddr, &saddr_len); + if (ret < 0) { + LOGP(DNS, LOGL_ERROR, "recv error %s during NS-FR-GRE recv\n", + strerror(errno)); + *error = ret; + goto out_err; + } else if (ret == 0) { + *error = ret; + goto out_err; + } + + msgb_put(msg, ret); + + if (msg->len < sizeof(*iph) + sizeof(*greh) + 2) { + LOGP(DNS, LOGL_ERROR, "Short IP packet: %u bytes\n", msg->len); + *error = -EIO; + goto out_err; + } + + iph = (struct iphdr *) msg->data; + if (msg->len < (iph->ihl*4 + sizeof(*greh) + 2)) { + LOGP(DNS, LOGL_ERROR, "Short IP packet: %u bytes\n", msg->len); + *error = -EIO; + goto out_err; + } + + greh = (struct gre_hdr *) (msg->data + iph->ihl*4); + if (greh->flags) { + LOGP(DNS, LOGL_NOTICE, "Unknown GRE flags 0x%04x\n", + ntohs(greh->flags)); + } + + switch (ntohs(greh->ptype)) { + case GRE_PTYPE_IPv4: + /* IPv4 messages might be GRE keepalives */ + *error = handle_rx_gre_ipv4(bfd, msg, iph, greh); + goto out_err; + break; + case GRE_PTYPE_FR: + /* continue as usual */ + break; + default: + LOGP(DNS, LOGL_NOTICE, "Unknown GRE protocol 0x%04x != FR\n", + ntohs(greh->ptype)); + *error = -EIO; + goto out_err; + break; + } + + if (msg->len < sizeof(*greh) + 2) { + LOGP(DNS, LOGL_ERROR, "Short FR header: %u bytes\n", msg->len); + *error = -EIO; + goto out_err; + } + + frh = (uint8_t *)greh + sizeof(*greh); + if (frh[0] & 0x01) { + LOGP(DNS, LOGL_NOTICE, "Unsupported single-byte FR address\n"); + *error = -EIO; + goto out_err; + } + dlci = ((frh[0] & 0xfc) << 2); + if ((frh[1] & 0x0f) != 0x01) { + LOGP(DNS, LOGL_NOTICE, "Unknown second FR octet 0x%02x\n", + frh[1]); + *error = -EIO; + goto out_err; + } + dlci |= (frh[1] >> 4); + + msg->l2h = frh+2; + + /* Store DLCI in NETWORK BYTEORDER in sockaddr port member */ + saddr->sin_port = htons(dlci); + + return msg; + +out_err: + msgb_free(msg); + return NULL; +} + +int gprs_ns_rcvmsg(struct gprs_ns_inst *nsi, struct msgb *msg, + struct sockaddr_in *saddr, enum gprs_ns_ll ll); + +static int handle_nsfrgre_read(struct bsc_fd *bfd) +{ + int rc; + struct sockaddr_in saddr; + struct gprs_ns_inst *nsi = bfd->data; + struct msgb *msg; + uint16_t dlci; + + msg = read_nsfrgre_msg(bfd, &rc, &saddr); + if (!msg) + return rc; + + dlci = ntohs(saddr.sin_port); + if (dlci == 0 || dlci == 1023) { + LOGP(DNS, LOGL_INFO, "Received FR on LMI DLCI %u - ignoring\n", + dlci); + rc = 0; + goto out; + } + + rc = gprs_ns_rcvmsg(nsi, msg, &saddr, GPRS_NS_LL_FR_GRE); +out: + msgb_free(msg); + + return rc; +} + +static int handle_nsfrgre_write(struct bsc_fd *bfd) +{ + /* FIXME: actually send the data here instead of nsip_sendmsg() */ + return -EIO; +} + +int gprs_ns_frgre_sendmsg(struct gprs_nsvc *nsvc, struct msgb *msg) +{ + int rc; + struct gprs_ns_inst *nsi = nsvc->nsi; + struct sockaddr_in daddr; + uint16_t dlci = ntohs(nsvc->frgre.bts_addr.sin_port); + uint8_t *frh; + struct gre_hdr *greh; + + /* Build socket address for the packet destionation */ + daddr.sin_family = AF_INET; + daddr.sin_addr = nsvc->frgre.bts_addr.sin_addr; + daddr.sin_port = IPPROTO_GRE; + + /* Prepend the FR header */ + frh = msgb_push(msg, 2); + frh[0] = (dlci >> 2) & 0xfc; + frh[1] = ((dlci & 0xf)<<4) | 0x01; + + /* Prepend the GRE header */ + greh = (struct gre_hdr *) msgb_push(msg, sizeof(*greh)); + greh->flags = 0; + greh->ptype = htons(GRE_PTYPE_FR); + + rc = sendto(nsi->frgre.fd.fd, msg->data, msg->len, 0, + (struct sockaddr *)&daddr, sizeof(daddr)); + + talloc_free(msg); + + return rc; +} + +static int nsfrgre_fd_cb(struct bsc_fd *bfd, unsigned int what) +{ + int rc = 0; + + if (what & BSC_FD_READ) + rc = handle_nsfrgre_read(bfd); + if (what & BSC_FD_WRITE) + rc = handle_nsfrgre_write(bfd); + + return rc; +} + +int gprs_ns_frgre_listen(struct gprs_ns_inst *nsi) +{ + int rc; + + /* Make sure we close any existing socket before changing it */ + if (nsi->frgre.fd.fd) + close(nsi->frgre.fd.fd); + + if (!nsi->frgre.enabled) + return 0; + + rc = make_sock(&nsi->frgre.fd, IPPROTO_GRE, nsi->frgre.local_ip, + 0, nsfrgre_fd_cb); + if (rc < 0) { + LOGP(DNS, LOGL_ERROR, "Error creating GRE socket (%s)\n", + strerror(errno)); + return rc; + } + nsi->frgre.fd.data = nsi; + + return rc; +} diff --git a/openbsc/src/libgb/gprs_ns_vty.c b/openbsc/src/libgb/gprs_ns_vty.c new file mode 100644 index 000000000..39277fc71 --- /dev/null +++ b/openbsc/src/libgb/gprs_ns_vty.c @@ -0,0 +1,569 @@ +/* VTY interface for our GPRS Networks Service (NS) implementation */ + +/* (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 <stdlib.h> +#include <unistd.h> +#include <errno.h> +#include <stdint.h> + +#include <arpa/inet.h> + +#include <openbsc/gsm_data.h> +#include <osmocore/msgb.h> +#include <osmocore/tlv.h> +#include <osmocore/talloc.h> +#include <osmocore/select.h> +#include <osmocore/rate_ctr.h> +#include <openbsc/debug.h> +#include <openbsc/signal.h> +#include <openbsc/gprs_ns.h> +#include <openbsc/gprs_bssgp.h> +#include <openbsc/vty.h> + +#include <osmocom/vty/vty.h> +#include <osmocom/vty/command.h> +#include <osmocom/vty/logging.h> +#include <osmocom/vty/telnet_interface.h> + +static struct gprs_ns_inst *vty_nsi = NULL; + +/* FIXME: this should go to some common file as it is copied + * in vty_interface.c of the BSC */ +static const struct value_string gprs_ns_timer_strs[] = { + { 0, "tns-block" }, + { 1, "tns-block-retries" }, + { 2, "tns-reset" }, + { 3, "tns-reset-retries" }, + { 4, "tns-test" }, + { 5, "tns-alive" }, + { 6, "tns-alive-retries" }, + { 0, NULL } +}; + +static struct cmd_node ns_node = { + NS_NODE, + "%s(ns)#", + 1, +}; + +static int config_write_ns(struct vty *vty) +{ + struct gprs_nsvc *nsvc; + unsigned int i; + struct in_addr ia; + + vty_out(vty, "ns%s", VTY_NEWLINE); + + llist_for_each_entry(nsvc, &vty_nsi->gprs_nsvcs, list) { + if (!nsvc->persistent) + continue; + vty_out(vty, " nse %u nsvci %u%s", + nsvc->nsei, nsvc->nsvci, VTY_NEWLINE); + vty_out(vty, " nse %u remote-role %s%s", + nsvc->nsei, nsvc->remote_end_is_sgsn ? "sgsn" : "bss", + VTY_NEWLINE); + switch (nsvc->ll) { + case GPRS_NS_LL_UDP: + vty_out(vty, " nse %u encapsulation udp%s", nsvc->nsei, + VTY_NEWLINE); + vty_out(vty, " nse %u remote-ip %s%s", + nsvc->nsei, + inet_ntoa(nsvc->ip.bts_addr.sin_addr), + VTY_NEWLINE); + vty_out(vty, " nse %u remote-port %u%s", + nsvc->nsei, ntohs(nsvc->ip.bts_addr.sin_port), + VTY_NEWLINE); + break; + case GPRS_NS_LL_FR_GRE: + vty_out(vty, " nse %u encapsulation framerelay-gre%s", + nsvc->nsei, VTY_NEWLINE); + vty_out(vty, " nse %u remote-ip %s%s", + nsvc->nsei, + inet_ntoa(nsvc->frgre.bts_addr.sin_addr), + VTY_NEWLINE); + vty_out(vty, " nse %u fr-dlci %u%s", + nsvc->nsei, ntohs(nsvc->frgre.bts_addr.sin_port), + VTY_NEWLINE); + default: + break; + } + } + + for (i = 0; i < ARRAY_SIZE(vty_nsi->timeout); i++) + vty_out(vty, " timer %s %u%s", + get_value_string(gprs_ns_timer_strs, i), + vty_nsi->timeout[i], VTY_NEWLINE); + + if (vty_nsi->nsip.local_ip) { + ia.s_addr = htonl(vty_nsi->nsip.local_ip); + vty_out(vty, " encapsulation udp local-ip %s%s", + inet_ntoa(ia), VTY_NEWLINE); + } + if (vty_nsi->nsip.local_port) + vty_out(vty, " encapsulation udp local-port %u%s", + vty_nsi->nsip.local_port, VTY_NEWLINE); + + vty_out(vty, " encapsulation framerelay-gre enabled %u%s", + vty_nsi->frgre.enabled ? 1 : 0, VTY_NEWLINE); + if (vty_nsi->frgre.local_ip) { + ia.s_addr = htonl(vty_nsi->frgre.local_ip); + vty_out(vty, " encapsulation framerelay-gre local-ip %s%s", + inet_ntoa(ia), VTY_NEWLINE); + } + + return CMD_SUCCESS; +} + +DEFUN(cfg_ns, cfg_ns_cmd, + "ns", + "Configure the GPRS Network Service") +{ + vty->node = NS_NODE; + return CMD_SUCCESS; +} + +static void dump_nse(struct vty *vty, struct gprs_nsvc *nsvc, int stats) +{ + vty_out(vty, "NSEI %5u, NS-VC %5u, Remote: %-4s, %5s %9s", + nsvc->nsei, nsvc->nsvci, + nsvc->remote_end_is_sgsn ? "SGSN" : "BSS", + nsvc->state & NSE_S_ALIVE ? "ALIVE" : "DEAD", + nsvc->state & NSE_S_BLOCKED ? "BLOCKED" : "UNBLOCKED"); + if (nsvc->ll == GPRS_NS_LL_UDP || nsvc->ll == GPRS_NS_LL_FR_GRE) + vty_out(vty, ", %s %15s:%u", + nsvc->ll == GPRS_NS_LL_UDP ? "UDP " : "FR-GRE", + inet_ntoa(nsvc->ip.bts_addr.sin_addr), + ntohs(nsvc->ip.bts_addr.sin_port)); + vty_out(vty, "%s", VTY_NEWLINE); + if (stats) + vty_out_rate_ctr_group(vty, " ", nsvc->ctrg); +} + +static void dump_ns(struct vty *vty, struct gprs_ns_inst *nsi, int stats) +{ + struct gprs_nsvc *nsvc; + struct in_addr ia; + + ia.s_addr = htonl(vty_nsi->nsip.local_ip); + vty_out(vty, "Encapsulation NS-UDP-IP Local IP: %s, UDP Port: %u%s", + inet_ntoa(ia), vty_nsi->nsip.local_port, VTY_NEWLINE); + + ia.s_addr = htonl(vty_nsi->frgre.local_ip); + vty_out(vty, "Encapsulation NS-FR-GRE-IP Local IP: %s%s", + inet_ntoa(ia), VTY_NEWLINE); + + llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) { + if (nsvc == nsi->unknown_nsvc) + continue; + dump_nse(vty, nsvc, stats); + } +} + +DEFUN(show_ns, show_ns_cmd, "show ns", + SHOW_STR "Display information about the NS protocol") +{ + struct gprs_ns_inst *nsi = vty_nsi; + dump_ns(vty, nsi, 0); + return CMD_SUCCESS; +} + +DEFUN(show_ns_stats, show_ns_stats_cmd, "show ns stats", + SHOW_STR + "Display information about the NS protocol\n" + "Include statistics\n") +{ + struct gprs_ns_inst *nsi = vty_nsi; + dump_ns(vty, nsi, 1); + return CMD_SUCCESS; +} + +DEFUN(show_nse, show_nse_cmd, "show ns (nsei|nsvc) <0-65535> [stats]", + SHOW_STR "Display information about the NS protocol\n" + "Select one NSE by its NSE Identifier\n" + "Select one NSE by its NS-VC Identifier\n" + "The Identifier of selected type\n" + "Include Statistics\n") +{ + struct gprs_ns_inst *nsi = vty_nsi; + struct gprs_nsvc *nsvc; + uint16_t id = atoi(argv[1]); + int show_stats = 0; + + if (!strcmp(argv[0], "nsei")) + nsvc = nsvc_by_nsei(nsi, id); + else + nsvc = nsvc_by_nsvci(nsi, id); + + if (!nsvc) { + vty_out(vty, "No such NS Entity%s", VTY_NEWLINE); + return CMD_WARNING; + } + + if (argc >= 3) + show_stats = 1; + + dump_nse(vty, nsvc, show_stats); + return CMD_SUCCESS; +} + +#define NSE_CMD_STR "Persistent NS Entity\n" "NS Entity ID (NSEI)\n" + +DEFUN(cfg_nse_nsvc, cfg_nse_nsvci_cmd, + "nse <0-65535> nsvci <0-65534>", + NSE_CMD_STR + "NS Virtual Connection\n" + "NS Virtual Connection ID (NSVCI)\n" + ) +{ + uint16_t nsei = atoi(argv[0]); + uint16_t nsvci = atoi(argv[1]); + struct gprs_nsvc *nsvc; + + nsvc = nsvc_by_nsei(vty_nsi, nsei); + if (!nsvc) { + nsvc = nsvc_create(vty_nsi, nsvci); + nsvc->nsei = nsei; + } + nsvc->nsvci = nsvci; + /* All NSVCs that are explicitly configured by VTY are + * marked as persistent so we can write them to the config + * file at some later point */ + nsvc->persistent = 1; + + return CMD_SUCCESS; +} + +DEFUN(cfg_nse_remoteip, cfg_nse_remoteip_cmd, + "nse <0-65535> remote-ip A.B.C.D", + NSE_CMD_STR + "Remote IP Address\n" + "Remote IP Address\n") +{ + uint16_t nsei = atoi(argv[0]); + struct gprs_nsvc *nsvc; + + nsvc = nsvc_by_nsei(vty_nsi, nsei); + if (!nsvc) { + vty_out(vty, "No such NSE (%u)%s", nsei, VTY_NEWLINE); + return CMD_WARNING; + } + inet_aton(argv[1], &nsvc->ip.bts_addr.sin_addr); + + return CMD_SUCCESS; + +} + +DEFUN(cfg_nse_remoteport, cfg_nse_remoteport_cmd, + "nse <0-65535> remote-port <0-65535>", + NSE_CMD_STR + "Remote UDP Port\n" + "Remote UDP Port Number\n") +{ + uint16_t nsei = atoi(argv[0]); + uint16_t port = atoi(argv[1]); + struct gprs_nsvc *nsvc; + + nsvc = nsvc_by_nsei(vty_nsi, nsei); + if (!nsvc) { + vty_out(vty, "No such NSE (%u)%s", nsei, VTY_NEWLINE); + return CMD_WARNING; + } + + if (nsvc->ll != GPRS_NS_LL_UDP) { + vty_out(vty, "Cannot set UDP Port on non-UDP NSE%s", + VTY_NEWLINE); + return CMD_WARNING; + } + + nsvc->ip.bts_addr.sin_port = htons(port); + + return CMD_SUCCESS; +} + +DEFUN(cfg_nse_fr_dlci, cfg_nse_fr_dlci_cmd, + "nse <0-65535> fr-dlci <16-1007>", + NSE_CMD_STR + "Frame Relay DLCI\n" + "Frame Relay DLCI Number\n") +{ + uint16_t nsei = atoi(argv[0]); + uint16_t dlci = atoi(argv[1]); + struct gprs_nsvc *nsvc; + + nsvc = nsvc_by_nsei(vty_nsi, nsei); + if (!nsvc) { + vty_out(vty, "No such NSE (%u)%s", nsei, VTY_NEWLINE); + return CMD_WARNING; + } + + if (nsvc->ll != GPRS_NS_LL_FR_GRE) { + vty_out(vty, "Cannot set FR DLCI on non-FR NSE%s", + VTY_NEWLINE); + return CMD_WARNING; + } + + nsvc->frgre.bts_addr.sin_port = htons(dlci); + + return CMD_SUCCESS; +} + +DEFUN(cfg_nse_encaps, cfg_nse_encaps_cmd, + "nse <0-65535> encapsulation (udp|framerelay-gre)", + NSE_CMD_STR + "Encapsulation for NS\n" + "UDP/IP Encapsulation\n" "Frame-Relay/GRE/IP Encapsulation\n") +{ + uint16_t nsei = atoi(argv[0]); + struct gprs_nsvc *nsvc; + + nsvc = nsvc_by_nsei(vty_nsi, nsei); + if (!nsvc) { + vty_out(vty, "No such NSE (%u)%s", nsei, VTY_NEWLINE); + return CMD_WARNING; + } + + if (!strcmp(argv[1], "udp")) + nsvc->ll = GPRS_NS_LL_UDP; + else + nsvc->ll = GPRS_NS_LL_FR_GRE; + + return CMD_SUCCESS; +} + + +DEFUN(cfg_nse_remoterole, cfg_nse_remoterole_cmd, + "nse <0-65535> remote-role (sgsn|bss)", + NSE_CMD_STR + "Remote NSE Role\n" + "Remote Peer is SGSN\n" + "Remote Peer is BSS\n") +{ + uint16_t nsei = atoi(argv[0]); + struct gprs_nsvc *nsvc; + + nsvc = nsvc_by_nsei(vty_nsi, nsei); + if (!nsvc) { + vty_out(vty, "No such NSE (%u)%s", nsei, VTY_NEWLINE); + return CMD_WARNING; + } + + if (!strcmp(argv[1], "sgsn")) + nsvc->remote_end_is_sgsn = 1; + else + nsvc->remote_end_is_sgsn = 0; + + return CMD_SUCCESS; +} + +DEFUN(cfg_no_nse, cfg_no_nse_cmd, + "no nse <0-65535>", + "Delete Persistent NS Entity\n" + "Delete " NSE_CMD_STR) +{ + uint16_t nsei = atoi(argv[0]); + struct gprs_nsvc *nsvc; + + nsvc = nsvc_by_nsei(vty_nsi, nsei); + if (!nsvc) { + vty_out(vty, "No such NSE (%u)%s", nsei, VTY_NEWLINE); + return CMD_WARNING; + } + + if (!nsvc->persistent) { + vty_out(vty, "NSEI %u is not a persistent NSE%s", + nsei, VTY_NEWLINE); + return CMD_WARNING; + } + + nsvc->persistent = 0; + + return CMD_SUCCESS; +} + +DEFUN(cfg_ns_timer, cfg_ns_timer_cmd, + "timer " NS_TIMERS " <0-65535>", + "Network Service Timer\n" + NS_TIMERS_HELP "Timer Value\n") +{ + int idx = get_string_value(gprs_ns_timer_strs, argv[0]); + int val = atoi(argv[1]); + + if (idx < 0 || idx >= ARRAY_SIZE(vty_nsi->timeout)) + return CMD_WARNING; + + vty_nsi->timeout[idx] = val; + + return CMD_SUCCESS; +} + +#define ENCAPS_STR "NS encapsulation options\n" + +DEFUN(cfg_nsip_local_ip, cfg_nsip_local_ip_cmd, + "encapsulation udp local-ip A.B.C.D", + ENCAPS_STR "NS over UDP Encapsulation\n" + "Set the IP address on which we listen for NS/UDP\n" + "IP Address\n") +{ + struct in_addr ia; + + inet_aton(argv[0], &ia); + vty_nsi->nsip.local_ip = ntohl(ia.s_addr); + + return CMD_SUCCESS; +} + +DEFUN(cfg_nsip_local_port, cfg_nsip_local_port_cmd, + "encapsulation udp local-port <0-65535>", + ENCAPS_STR "NS over UDP Encapsulation\n" + "Set the UDP port on which we listen for NS/UDP\n" + "UDP port number\n") +{ + unsigned int port = atoi(argv[0]); + + vty_nsi->nsip.local_port = port; + + return CMD_SUCCESS; +} + +DEFUN(cfg_frgre_local_ip, cfg_frgre_local_ip_cmd, + "encapsulation framerelay-gre local-ip A.B.C.D", + ENCAPS_STR "NS over Frame Relay over GRE Encapsulation\n" + "Set the IP address on which we listen for NS/FR/GRE\n" + "IP Address\n") +{ + struct in_addr ia; + + if (!vty_nsi->frgre.enabled) { + vty_out(vty, "FR/GRE is not enabled%s", VTY_NEWLINE); + return CMD_WARNING; + } + inet_aton(argv[0], &ia); + vty_nsi->frgre.local_ip = ntohl(ia.s_addr); + + return CMD_SUCCESS; +} + +DEFUN(cfg_frgre_enable, cfg_frgre_enable_cmd, + "encapsulation framerelay-gre enabled (1|0)", + ENCAPS_STR "NS over Frame Relay over GRE Encapsulation\n" + "Enable or disable Frame Relay over GRE\n" + "Enable\n" "Disable\n") +{ + int enabled = atoi(argv[0]); + + vty_nsi->frgre.enabled = enabled; + + return CMD_SUCCESS; +} + +DEFUN(nsvc_nsei, nsvc_nsei_cmd, + "nsvc nsei <0-65535> (block|unblock|reset)", + "Perform an operation on a NSVC\n" + "NS-VC Identifier (NS-VCI)\n" + "Initiate BLOCK procedure\n" + "Initiate UNBLOCK procedure\n" + "Initiate RESET procedure\n") +{ + uint16_t nsvci = atoi(argv[0]); + const char *operation = argv[1]; + struct gprs_nsvc *nsvc; + + nsvc = nsvc_by_nsei(vty_nsi, nsvci); + if (!nsvc) { + vty_out(vty, "No such NSVCI (%u)%s", nsvci, VTY_NEWLINE); + return CMD_WARNING; + } + + if (!strcmp(operation, "block")) + gprs_ns_tx_block(nsvc, NS_CAUSE_OM_INTERVENTION); + else if (!strcmp(operation, "unblock")) + gprs_ns_tx_unblock(nsvc); + else if (!strcmp(operation, "reset")) + gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION); + else + return CMD_WARNING; + + return CMD_SUCCESS; +} + +DEFUN(logging_fltr_nsvc, + logging_fltr_nsvc_cmd, + "logging filter nsvc (nsei|nsvci) <0-65535>", + LOGGING_STR FILTER_STR + "Filter based on NS Virtual Connection\n" + "Identify NS-VC by NSEI\n" + "Identify NS-VC by NSVCI\n" + "Numeric identifier\n") +{ + struct log_target *tgt = osmo_log_vty2tgt(vty); + struct gprs_nsvc *nsvc; + uint16_t id = atoi(argv[1]); + + if (!tgt) + return CMD_WARNING; + + if (!strcmp(argv[0], "nsei")) + nsvc = nsvc_by_nsei(vty_nsi, id); + else + nsvc = nsvc_by_nsvci(vty_nsi, id); + + if (!nsvc) { + vty_out(vty, "No NS-VC by that identifier%s", VTY_NEWLINE); + return CMD_WARNING; + } + + log_set_nsvc_filter(tgt, nsvc); + return CMD_SUCCESS; +} + +int gprs_ns_vty_init(struct gprs_ns_inst *nsi) +{ + vty_nsi = nsi; + + install_element_ve(&show_ns_cmd); + install_element_ve(&show_ns_stats_cmd); + install_element_ve(&show_nse_cmd); + install_element_ve(&logging_fltr_nsvc_cmd); + + install_element(CFG_LOG_NODE, &logging_fltr_nsvc_cmd); + + install_element(CONFIG_NODE, &cfg_ns_cmd); + install_node(&ns_node, config_write_ns); + install_default(NS_NODE); + install_element(NS_NODE, &ournode_exit_cmd); + install_element(NS_NODE, &ournode_end_cmd); + install_element(NS_NODE, &cfg_nse_nsvci_cmd); + install_element(NS_NODE, &cfg_nse_remoteip_cmd); + install_element(NS_NODE, &cfg_nse_remoteport_cmd); + install_element(NS_NODE, &cfg_nse_fr_dlci_cmd); + install_element(NS_NODE, &cfg_nse_encaps_cmd); + install_element(NS_NODE, &cfg_nse_remoterole_cmd); + install_element(NS_NODE, &cfg_no_nse_cmd); + install_element(NS_NODE, &cfg_ns_timer_cmd); + install_element(NS_NODE, &cfg_nsip_local_ip_cmd); + install_element(NS_NODE, &cfg_nsip_local_port_cmd); + install_element(NS_NODE, &cfg_frgre_enable_cmd); + install_element(NS_NODE, &cfg_frgre_local_ip_cmd); + + install_element(ENABLE_NODE, &nsvc_nsei_cmd); + + return 0; +} |