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authorHarald Welte <laforge@gnumonks.org>2011-03-04 13:18:30 +0100
committerHarald Welte <laforge@gnumonks.org>2011-03-04 13:23:09 +0100
commit89579b4317a7f7ab6ee706399bee4b8f25a12c3a (patch)
tree8e66e64f14e582cd29f6b78023528297b71548ba /openbsc/src/libgb
parent5a6b68f4169c0ef55dca02a9644ee8f3bbc97e60 (diff)
prefix sub-directories containing libraries with 'lib'
... and make sure tests work again after restructuring
Diffstat (limited to 'openbsc/src/libgb')
-rw-r--r--openbsc/src/libgb/Makefile.am9
-rw-r--r--openbsc/src/libgb/gprs_bssgp.c856
-rw-r--r--openbsc/src/libgb/gprs_bssgp_util.c119
-rw-r--r--openbsc/src/libgb/gprs_bssgp_vty.c176
-rw-r--r--openbsc/src/libgb/gprs_ns.c992
-rw-r--r--openbsc/src/libgb/gprs_ns_frgre.c304
-rw-r--r--openbsc/src/libgb/gprs_ns_vty.c569
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;
+}