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-rw-r--r--openbsc/src/libgb/gprs_bssgp.c919
1 files changed, 0 insertions, 919 deletions
diff --git a/openbsc/src/libgb/gprs_bssgp.c b/openbsc/src/libgb/gprs_bssgp.c
deleted file mode 100644
index 4b8c7302..00000000
--- a/openbsc/src/libgb/gprs_bssgp.c
+++ /dev/null
@@ -1,919 +0,0 @@
-/* GPRS BSSGP protocol implementation as per 3GPP TS 08.18 */
-
-/* (C) 2009-2012 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 <osmocom/core/msgb.h>
-#include <osmocom/gsm/tlv.h>
-#include <osmocom/core/talloc.h>
-#include <osmocom/core/rate_ctr.h>
-
-#include <osmocom/gprs/gprs_bssgp.h>
-#include <osmocom/gprs/gprs_ns.h>
-
-#include "common_vty.h"
-
-void *bssgp_tall_ctx = NULL;
-
-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));
-}
-
-int bssgp_create_cell_id(uint8_t *buf, const struct gprs_ra_id *raid,
- uint16_t cid)
-{
- uint16_t *out_cid = (uint16_t *) (buf + 6);
- /* 6 octets RAC */
- gsm48_construct_ra(buf, raid);
- /* 2 octets CID */
- *out_cid = htons(cid);
-
- return 8;
-}
-
-/* Chapter 8.4 BVC-Reset Procedure */
-static int bssgp_rx_bvc_reset(struct msgb *msg, struct tlv_parsed *tp,
- uint16_t ns_bvci)
-{
- struct osmo_bssgp_prim nmp;
- 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 Rx 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);
- }
-
- /* Send NM_BVC_RESET.ind to NM */
- memset(&nmp, 0, sizeof(nmp));
- nmp.nsei = nsei;
- nmp.bvci = bvci;
- nmp.tp = tp;
- nmp.ra_id = &bctx->ra_id;
- osmo_prim_init(&nmp.oph, SAP_BSSGP_NM, PRIM_NM_BVC_RESET,
- PRIM_OP_INDICATION, msg);
- bssgp_prim_cb(&nmp.oph, NULL);
-
- /* 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)
-{
- struct osmo_bssgp_prim nmp;
- 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 Rx 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]);
-
- /* Send NM_BVC_BLOCK.ind to NM */
- memset(&nmp, 0, sizeof(nmp));
- nmp.nsei = msgb_nsei(msg);
- nmp.bvci = bvci;
- nmp.tp = tp;
- osmo_prim_init(&nmp.oph, SAP_BSSGP_NM, PRIM_NM_BVC_BLOCK,
- PRIM_OP_INDICATION, msg);
- bssgp_prim_cb(&nmp.oph, NULL);
-
- /* 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)
-{
- struct osmo_bssgp_prim nmp;
- 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;
-
- /* Send NM_BVC_UNBLOCK.ind to NM */
- memset(&nmp, 0, sizeof(nmp));
- nmp.nsei = msgb_nsei(msg);
- nmp.bvci = bvci;
- nmp.tp = tp;
- osmo_prim_init(&nmp.oph, SAP_BSSGP_NM, PRIM_NM_BVC_UNBLOCK,
- PRIM_OP_INDICATION, msg);
- bssgp_prim_cb(&nmp.oph, NULL);
-
- /* 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 osmo_bssgp_prim gbp;
- 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 Rx 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);
-
- /* Send BSSGP_UL_UD.ind to NM */
- memset(&gbp, 0, sizeof(gbp));
- gbp.nsei = ctx->nsei;
- gbp.bvci = ctx->bvci;
- gbp.tlli = msgb_tlli(msg);
- gbp.tp = tp;
- osmo_prim_init(&gbp.oph, SAP_BSSGP_LL, PRIM_BSSGP_UL_UD,
- PRIM_OP_INDICATION, msg);
- return bssgp_prim_cb(&gbp.oph, NULL);
-}
-
-static int bssgp_rx_suspend(struct msgb *msg, struct tlv_parsed *tp,
- struct bssgp_bvc_ctx *ctx)
-{
- struct osmo_bssgp_prim gbp;
- 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 */
- memset(&gbp, 0, sizeof(gbp));
- gbp.nsei = msgb_nsei(msg);
- gbp.bvci = ctx->bvci;
- gbp.tlli = tlli;
- gbp.ra_id = &raid;
- osmo_prim_init(&gbp.oph, SAP_BSSGP_GMM, PRIM_BSSGP_GMM_SUSPEND,
- PRIM_OP_REQUEST, msg);
-
- rc = bssgp_prim_cb(&gbp.oph, NULL);
- 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 osmo_bssgp_prim gbp;
- 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 Rx RESUME\n", ctx->bvci, tlli);
-
- gsm48_parse_ra(&raid, TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA));
-
- /* Inform GMM about the RESUME request */
- memset(&gbp, 0, sizeof(gbp));
- gbp.nsei = msgb_nsei(msg);
- gbp.bvci = ctx->bvci;
- gbp.tlli = tlli;
- gbp.ra_id = &raid;
- gbp.u.resume.suspend_ref = suspend_ref;
- osmo_prim_init(&gbp.oph, SAP_BSSGP_GMM, PRIM_BSSGP_GMM_RESUME,
- PRIM_OP_REQUEST, msg);
-
- rc = bssgp_prim_cb(&gbp.oph, NULL);
- 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)
-{
- struct osmo_bssgp_prim nmp;
- 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 Rx LLC DISCARDED\n",
- ctx->bvci, tlli);
-
- rate_ctr_inc(&ctx->ctrg->ctr[BSSGP_CTR_DISCARDED]);
-
- /* send NM_LLC_DISCARDED to NM */
- memset(&nmp, 0, sizeof(nmp));
- nmp.nsei = msgb_nsei(msg);
- nmp.bvci = ctx->bvci;
- nmp.tlli = tlli;
- nmp.tp = tp;
- osmo_prim_init(&nmp.oph, SAP_BSSGP_NM, PRIM_NM_LLC_DISCARDED,
- PRIM_OP_INDICATION, msg);
-
- return bssgp_prim_cb(&nmp.oph, NULL);
-}
-
-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 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 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 Rx BVCI=%u 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 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(GPRS_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 = 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 = bssgp_rx_ptp(msg, &tp, bctx);
-
- return rc;
-}
-
-int bssgp_tx_dl_ud(struct msgb *msg, uint16_t pdu_lifetime,
- struct bssgp_dl_ud_par *dup)
-{
- struct bssgp_bvc_ctx *bctx;
- struct bssgp_ud_hdr *budh;
- uint8_t llc_pdu_tlv_hdr_len = 2;
- uint8_t *llc_pdu_tlv;
- uint16_t msg_len = msg->len;
- uint16_t bvci = msgb_bvci(msg);
- uint16_t nsei = msgb_nsei(msg);
- uint16_t _pdu_lifetime = htons(pdu_lifetime); /* centi-seconds */
- 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 (dup) {
- /* Old TLLI to help BSS map from old->new */
- if (dup->tlli) {
- uint32_t tlli = htonl(*dup->tlli);
- msgb_tvlv_push(msg, BSSGP_IE_TLLI, 4, (uint8_t *) &tlli);
- }
-
- /* IMSI */
- if (strlen(dup->imsi)) {
- uint8_t mi[10];
- int imsi_len = gsm48_generate_mid_from_imsi(mi, dup->imsi);
- if (imsi_len > 2)
- msgb_tvlv_push(msg, BSSGP_IE_IMSI,
- imsi_len-2, mi+2);
- }
-
- /* DRX parameters */
- drx_params = htons(dup->drx_parms);
- msgb_tvlv_push(msg, BSSGP_IE_DRX_PARAMS, 2,
- (uint8_t *) &drx_params);
-
- /* FIXME: Priority */
-
- /* MS Radio Access Capability */
- if (dup->ms_ra_cap.len)
- msgb_tvlv_push(msg, BSSGP_IE_MS_RADIO_ACCESS_CAP,
- dup->ms_ra_cap.len, dup->ms_ra_cap.v);
-
- }
-
- /* prepend the 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, dup->qos_profile, sizeof(budh->qos_profile));
- 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 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);
-}
-
-void bssgp_set_log_ss(int ss)
-{
- DBSSGP = ss;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-04 14:05:21 +0000