| /* NS-over-IP proxy */ |
| |
| /* (C) 2010 by Harald Welte <laforge@gnumonks.org> |
| * (C) 2010-2013 by On-Waves |
| * (C) 2013 by Holger Hans Peter Freyther |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation; either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #include <unistd.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <getopt.h> |
| #include <errno.h> |
| #include <sys/fcntl.h> |
| #include <sys/stat.h> |
| #include <arpa/inet.h> |
| #include <time.h> |
| |
| #include <osmocom/core/hashtable.h> |
| #include <osmocom/core/logging.h> |
| #include <osmocom/core/talloc.h> |
| #include <osmocom/core/select.h> |
| #include <osmocom/core/rate_ctr.h> |
| #include <osmocom/core/stats.h> |
| |
| #include <osmocom/gprs/gprs_ns2.h> |
| #include <osmocom/gprs/gprs_bssgp.h> |
| #include <osmocom/gprs/gprs_bssgp_bss.h> |
| |
| #include <osmocom/gsm/gsm_utils.h> |
| |
| #include <osmocom/sgsn/signal.h> |
| #include <osmocom/sgsn/debug.h> |
| #include <osmocom/sgsn/gprs_gb_parse.h> |
| #include <osmocom/sgsn/gb_proxy.h> |
| |
| #include <osmocom/sgsn/gprs_llc.h> |
| #include <osmocom/gsm/protocol/gsm_04_08_gprs.h> |
| #include <osmocom/sgsn/gprs_utils.h> |
| |
| extern void *tall_sgsn_ctx; |
| |
| static const struct rate_ctr_desc global_ctr_description[] = { |
| { "inv-bvci", "Invalid BVC Identifier " }, |
| { "inv-lai", "Invalid Location Area Identifier" }, |
| { "inv-rai", "Invalid Routing Area Identifier " }, |
| { "inv-nsei", "No BVC established for NSEI " }, |
| { "proto-err:bss", "BSSGP protocol error (BSS )" }, |
| { "proto-err:sgsn", "BSSGP protocol error (SGSN)" }, |
| { "not-supp:bss", "Feature not supported (BSS )" }, |
| { "not-supp:sgsn", "Feature not supported (SGSN)" }, |
| { "restart:sgsn", "Restarted RESET procedure (SGSN)" }, |
| { "tx-err:sgsn", "NS Transmission error (SGSN)" }, |
| { "error", "Other error " }, |
| { "mod-peer-err", "Patch error: no peer " }, |
| }; |
| |
| static const struct rate_ctr_group_desc global_ctrg_desc = { |
| .group_name_prefix = "gbproxy:global", |
| .group_description = "GBProxy Global Statistics", |
| .num_ctr = ARRAY_SIZE(global_ctr_description), |
| .ctr_desc = global_ctr_description, |
| .class_id = OSMO_STATS_CLASS_GLOBAL, |
| }; |
| |
| static int gbprox_relay2peer(struct msgb *old_msg, struct gbproxy_bvc *bvc, |
| uint16_t ns_bvci); |
| static int gbprox_relay2sgsn(struct gbproxy_config *cfg, struct msgb *old_msg, |
| uint16_t ns_bvci, uint16_t sgsn_nsei); |
| |
| |
| static int gbproxy_is_sgsn_nsei(struct gbproxy_config *cfg, uint16_t nsei) |
| { |
| return nsei == cfg->nsip_sgsn_nsei; |
| } |
| |
| static int check_bvc_nsei(struct gbproxy_bvc *bvc, uint16_t nsei) |
| { |
| OSMO_ASSERT(bvc); |
| OSMO_ASSERT(bvc->nse); |
| |
| if (bvc->nse->nsei != nsei) { |
| LOGPBVC(bvc, LOGL_NOTICE, "Peer entry doesn't match current NSEI " |
| "via NSE(%05u/BSS)\n", nsei); |
| rate_ctr_inc(&bvc->ctrg->ctr[GBPROX_PEER_CTR_INV_NSEI]); |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| /* generate BVC-STATUS message with cause value derived from TLV-parser error */ |
| static int tx_status_from_tlvp(enum osmo_tlv_parser_error tlv_p_err, struct msgb *orig_msg) |
| { |
| uint8_t bssgp_cause; |
| switch (tlv_p_err) { |
| case OSMO_TLVP_ERR_MAND_IE_MISSING: |
| bssgp_cause = BSSGP_CAUSE_MISSING_MAND_IE; |
| break; |
| default: |
| bssgp_cause = BSSGP_CAUSE_PROTO_ERR_UNSPEC; |
| } |
| return bssgp_tx_status(bssgp_cause, NULL, orig_msg); |
| } |
| |
| /* strip off the NS header */ |
| static void strip_ns_hdr(struct msgb *msg) |
| { |
| int strip_len = msgb_bssgph(msg) - msg->data; |
| msgb_pull(msg, strip_len); |
| } |
| |
| /* feed a message down the NS-VC associated with the specified bvc */ |
| static int gbprox_relay2sgsn(struct gbproxy_config *cfg, struct msgb *old_msg, |
| uint16_t ns_bvci, uint16_t sgsn_nsei) |
| { |
| /* create a copy of the message so the old one can |
| * be free()d safely when we return from gbprox_rcvmsg() */ |
| struct gprs_ns2_inst *nsi = cfg->nsi; |
| struct osmo_gprs_ns2_prim nsp = {}; |
| struct msgb *msg = bssgp_msgb_copy(old_msg, "msgb_relay2sgsn"); |
| int rc; |
| |
| DEBUGP(DGPRS, "NSE(%05u/BSS)-BVC(%05u) proxying BTS->SGSN NSE(%05u/SGSN)\n", |
| msgb_nsei(msg), ns_bvci, sgsn_nsei); |
| |
| nsp.bvci = ns_bvci; |
| nsp.nsei = sgsn_nsei; |
| |
| strip_ns_hdr(msg); |
| osmo_prim_init(&nsp.oph, SAP_NS, PRIM_NS_UNIT_DATA, |
| PRIM_OP_REQUEST, msg); |
| rc = gprs_ns2_recv_prim(nsi, &nsp.oph); |
| if (rc < 0) |
| rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_TX_ERR_SGSN]); |
| return rc; |
| } |
| |
| /* feed a message down the NSE */ |
| static int gbprox_relay2nse(struct msgb *old_msg, struct gbproxy_nse *nse, |
| uint16_t ns_bvci) |
| { |
| OSMO_ASSERT(nse); |
| OSMO_ASSERT(nse->cfg); |
| |
| /* create a copy of the message so the old one can |
| * be free()d safely when we return from gbprox_rcvmsg() */ |
| struct gprs_ns2_inst *nsi = nse->cfg->nsi; |
| struct osmo_gprs_ns2_prim nsp = {}; |
| struct msgb *msg = bssgp_msgb_copy(old_msg, "msgb_relay2nse"); |
| uint32_t tlli; |
| int rc; |
| |
| DEBUGP(DGPRS, "NSE(%05u/SGSN)-BVC(%05u) proxying SGSN->BSS NSE(%05u/BSS)\n", |
| msgb_nsei(msg), ns_bvci, nse->nsei); |
| |
| nsp.bvci = ns_bvci; |
| nsp.nsei = nse->nsei; |
| |
| /* Strip the old NS header, it will be replaced with a new one */ |
| strip_ns_hdr(msg); |
| |
| /* TS 48.018 Section 5.4.2: The link selector parameter is |
| * defined in 3GPP TS 48.016. At one side of the Gb interface, |
| * all BSSGP UNITDATA PDUs related to an MS shall be passed with |
| * the same LSP, e.g. the LSP contains the MS's TLLI, to the |
| * underlying network service. */ |
| if (gprs_gb_parse_tlli(msgb_data(msg), msgb_length(msg), &tlli) == 1) |
| nsp.u.unitdata.link_selector = tlli; |
| |
| osmo_prim_init(&nsp.oph, SAP_NS, PRIM_NS_UNIT_DATA, |
| PRIM_OP_REQUEST, msg); |
| rc = gprs_ns2_recv_prim(nsi, &nsp.oph); |
| /* FIXME: We need a counter group for gbproxy_nse */ |
| //if (rc < 0) |
| // rate_ctr_inc(&bvc->ctrg->ctr[GBPROX_PEER_CTR_TX_ERR]); |
| |
| return rc; |
| } |
| |
| /* feed a message down the NS-VC associated with the specified bvc */ |
| static int gbprox_relay2peer(struct msgb *old_msg, struct gbproxy_bvc *bvc, |
| uint16_t ns_bvci) |
| { |
| int rc; |
| struct gbproxy_nse *nse = bvc->nse; |
| OSMO_ASSERT(nse); |
| |
| rc = gbprox_relay2nse(old_msg, nse, ns_bvci); |
| if (rc < 0) |
| rate_ctr_inc(&bvc->ctrg->ctr[GBPROX_PEER_CTR_TX_ERR]); |
| |
| return rc; |
| } |
| |
| static int block_unblock_bvc(struct gbproxy_config *cfg, uint16_t ptp_bvci, uint8_t pdu_type) |
| { |
| struct gbproxy_bvc *bvc; |
| |
| bvc = gbproxy_bvc_by_bvci(cfg, ptp_bvci); |
| if (!bvc) { |
| LOGP(DGPRS, LOGL_ERROR, "BVC(%05u/??) Cannot find BSS\n", |
| ptp_bvci); |
| rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
| return -ENOENT; |
| } |
| |
| switch (pdu_type) { |
| case BSSGP_PDUT_BVC_BLOCK_ACK: |
| bvc->blocked = true; |
| rate_ctr_inc(&bvc->ctrg->ctr[GBPROX_PEER_CTR_BLOCKED]); |
| break; |
| case BSSGP_PDUT_BVC_UNBLOCK_ACK: |
| bvc->blocked = false; |
| rate_ctr_inc(&bvc->ctrg->ctr[GBPROX_PEER_CTR_UNBLOCKED]); |
| break; |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| /* Send a message to a bvc identified by ptp_bvci but using ns_bvci |
| * in the NS hdr */ |
| static int gbprox_relay2bvci(struct gbproxy_config *cfg, struct msgb *msg, uint16_t ptp_bvci, |
| uint16_t ns_bvci) |
| { |
| struct gbproxy_bvc *bvc; |
| |
| bvc = gbproxy_bvc_by_bvci(cfg, ptp_bvci); |
| if (!bvc) { |
| LOGP(DGPRS, LOGL_ERROR, "BVC(%05u/??) Cannot find BSS\n", |
| ptp_bvci); |
| rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
| return -ENOENT; |
| } |
| |
| return gbprox_relay2peer(msg, bvc, ns_bvci); |
| } |
| |
| int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) |
| { |
| return 0; |
| } |
| |
| /* Receive an incoming PTP message from a BSS-side NS-VC */ |
| static int gbprox_rx_ptp_from_bss(struct gbproxy_config *cfg, |
| struct msgb *msg, uint16_t nsei, |
| uint16_t ns_bvci) |
| { |
| struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
| struct gbproxy_bvc *bvc; |
| |
| if (ns_bvci == 0 && ns_bvci == 1) { |
| LOGP(DGPRS, LOGL_NOTICE, "NSE(%05u/BSS) BVCI=%05u is not PTP\n", nsei, ns_bvci); |
| return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| } |
| |
| if (!(bssgp_pdu_type_flags(bgph->pdu_type) & BSSGP_PDUF_PTP)) { |
| LOGP(DGPRS, LOGL_NOTICE, "NSE(%05u/%05u) %s not allowed in PTP BVC\n", |
| nsei, ns_bvci, osmo_tlv_prot_msg_name(&osmo_pdef_bssgp, bgph->pdu_type)); |
| return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| } |
| |
| if (!(bssgp_pdu_type_flags(bgph->pdu_type) & BSSGP_PDUF_UL)) { |
| LOGP(DGPRS, LOGL_NOTICE, "NSE(%05u/%05u) %s not allowed in uplink direction\n", |
| nsei, ns_bvci, osmo_tlv_prot_msg_name(&osmo_pdef_bssgp, bgph->pdu_type)); |
| return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| } |
| |
| bvc = gbproxy_bvc_by_bvci(cfg, ns_bvci); |
| if (!bvc) { |
| LOGP(DGPRS, LOGL_NOTICE, "BVC(%05u/??) Didn't find bvc " |
| "for PTP message from NSE(%05u/BSS), " |
| "discarding message\n", |
| ns_bvci, nsei); |
| return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, |
| &ns_bvci, msg); |
| } |
| |
| /* TODO: Should we discard this message if the check fails */ |
| check_bvc_nsei(bvc, nsei); |
| |
| return gbprox_relay2sgsn(cfg, msg, ns_bvci, cfg->nsip_sgsn_nsei); |
| } |
| |
| /* Receive an incoming PTP message from a SGSN-side NS-VC */ |
| static int gbprox_rx_ptp_from_sgsn(struct gbproxy_config *cfg, |
| struct msgb *msg, uint16_t nsei, |
| uint16_t ns_bvci) |
| { |
| struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
| struct gbproxy_bvc *bvc; |
| |
| if (ns_bvci == 0 && ns_bvci == 1) { |
| LOGP(DGPRS, LOGL_NOTICE, "NSE(%05u/BSS) BVCI=%05u is not PTP\n", nsei, ns_bvci); |
| return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| } |
| |
| if (!(bssgp_pdu_type_flags(bgph->pdu_type) & BSSGP_PDUF_PTP)) { |
| LOGP(DGPRS, LOGL_NOTICE, "NSE(%05u/%05u) %s not allowed in PTP BVC\n", |
| nsei, ns_bvci, osmo_tlv_prot_msg_name(&osmo_pdef_bssgp, bgph->pdu_type)); |
| return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| } |
| |
| if (!(bssgp_pdu_type_flags(bgph->pdu_type) & BSSGP_PDUF_DL)) { |
| LOGP(DGPRS, LOGL_NOTICE, "NSE(%05u/%05u) %s not allowed in downlink direction\n", |
| nsei, ns_bvci, osmo_tlv_prot_msg_name(&osmo_pdef_bssgp, bgph->pdu_type)); |
| return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| } |
| |
| bvc = gbproxy_bvc_by_bvci(cfg, ns_bvci); |
| if (!bvc) { |
| LOGP(DGPRS, LOGL_INFO, "BVC(%05u/??) Didn't find bvc for " |
| "for message from NSE(%05u/SGSN)\n", |
| ns_bvci, nsei); |
| rate_ctr_inc(&cfg->ctrg-> |
| ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
| return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, |
| &ns_bvci, msg); |
| } |
| |
| if (bvc->blocked) { |
| LOGPBVC(bvc, LOGL_NOTICE, "Dropping PDU for " |
| "blocked BVC via NSE(%05u/SGSN)\n", nsei); |
| rate_ctr_inc(&bvc->ctrg->ctr[GBPROX_PEER_CTR_DROPPED]); |
| return bssgp_tx_status(BSSGP_CAUSE_BVCI_BLOCKED, &ns_bvci, msg); |
| } |
| |
| return gbprox_relay2peer(msg, bvc, ns_bvci); |
| } |
| |
| /* process a BVC-RESET message from the BSS side */ |
| static int gbprox_rx_bvc_reset_from_bss(struct gbproxy_config *cfg, struct msgb *msg, |
| uint16_t nsei, struct tlv_parsed *tp) |
| { |
| struct gbproxy_bvc *from_bvc = NULL; |
| uint16_t bvci; |
| |
| if (!TLVP_PRES_LEN(tp, BSSGP_IE_BVCI, 2) || !TLVP_PRES_LEN(tp, BSSGP_IE_CAUSE, 1)) { |
| rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_PROTO_ERR_BSS]); |
| return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); |
| } |
| |
| bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); |
| LOGP(DGPRS, LOGL_INFO, "NSE(%05u) Rx BVC RESET (BVCI=%05u)\n", nsei, bvci); |
| if (bvci == 0) { |
| /* If we receive a BVC reset on the signalling endpoint, we |
| * don't want the SGSN to reset, as the signalling endpoint |
| * is common for all point-to-point BVCs (and thus all BTS) */ |
| |
| /* Ensure the NSE bvc is there and clear all PtP BVCs */ |
| struct gbproxy_nse *nse = gbproxy_nse_by_nsei_or_new(cfg, nsei); |
| if (!nse) { |
| LOGP(DGPRS, LOGL_ERROR, "Could not create NSE(%05u)\n", nsei); |
| bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, 0, msg); |
| return 0; |
| } |
| |
| gbproxy_cleanup_bvcs(cfg, nsei, 0); |
| |
| /* FIXME: only do this if SGSN is alive! */ |
| LOGPNSE(nse, LOGL_INFO, "Tx fake BVC RESET ACK of BVCI=0\n"); |
| bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_RESET_ACK, nsei, 0, 0); |
| return 0; |
| } else { |
| from_bvc = gbproxy_bvc_by_bvci(cfg, bvci); |
| if (!from_bvc) { |
| struct gbproxy_nse *nse = gbproxy_nse_by_nsei(cfg, nsei); |
| if (!nse) { |
| LOGP(DGPRS, LOGL_NOTICE, "NSE(%05u) Got PtP BVC reset before signalling reset for " |
| "BVCI=%05u\n", nsei, bvci); |
| bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_STATE, NULL, msg); |
| return 0; |
| } |
| /* if a PTP-BVC is reset, and we don't know that |
| * PTP-BVCI yet, we should allocate a new bvc */ |
| from_bvc = gbproxy_bvc_alloc(nse, bvci); |
| OSMO_ASSERT(from_bvc); |
| LOGPBVC(from_bvc, LOGL_INFO, "Allocated new bvc\n"); |
| } |
| |
| /* Could have moved to a different NSE */ |
| if (!check_bvc_nsei(from_bvc, nsei)) { |
| LOGPBVC(from_bvc, LOGL_NOTICE, "moving bvc to NSE(%05u)\n", nsei); |
| |
| struct gbproxy_nse *nse_new = gbproxy_nse_by_nsei(cfg, nsei); |
| if (!nse_new) { |
| LOGP(DGPRS, LOGL_NOTICE, "NSE(%05u) Got PtP BVC reset before signalling reset for " |
| "BVCI=%05u\n", bvci, nsei); |
| bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_STATE, NULL, msg); |
| return 0; |
| } |
| |
| /* Move bvc to different NSE */ |
| gbproxy_bvc_move(from_bvc, nse_new); |
| } |
| |
| if (TLVP_PRES_LEN(tp, BSSGP_IE_CELL_ID, 8)) { |
| struct gprs_ra_id raid; |
| /* We have a Cell Identifier present in this |
| * PDU, this means we can extend our local |
| * state information about this particular cell |
| * */ |
| memcpy(from_bvc->ra, TLVP_VAL(tp, BSSGP_IE_CELL_ID), sizeof(from_bvc->ra)); |
| gsm48_parse_ra(&raid, from_bvc->ra); |
| LOGPBVC(from_bvc, LOGL_INFO, "Cell ID %s\n", osmo_rai_name(&raid)); |
| } |
| } |
| /* continue processing / relaying to SGSN[s] */ |
| return 1; |
| } |
| |
| /* Receive an incoming signalling message from a BSS-side NS-VC */ |
| static int gbprox_rx_sig_from_bss(struct gbproxy_config *cfg, |
| struct msgb *msg, uint16_t nsei, |
| uint16_t ns_bvci) |
| { |
| struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
| struct tlv_parsed tp; |
| uint8_t pdu_type = bgph->pdu_type; |
| int data_len = msgb_bssgp_len(msg) - sizeof(*bgph); |
| struct gbproxy_bvc *from_bvc = NULL; |
| struct gprs_ra_id raid; |
| char log_pfx[32]; |
| int rc; |
| |
| snprintf(log_pfx, sizeof(log_pfx), "NSE(%05u/BSS)", nsei); |
| |
| if (ns_bvci != 0 && ns_bvci != 1) { |
| LOGP(DGPRS, LOGL_NOTICE, "%s BVCI=%05u is not signalling\n", log_pfx, ns_bvci); |
| return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| } |
| |
| if (!(bssgp_pdu_type_flags(pdu_type) & BSSGP_PDUF_SIG)) { |
| LOGP(DGPRS, LOGL_NOTICE, "%s %s not allowed in signalling BVC\n", log_pfx, |
| osmo_tlv_prot_msg_name(&osmo_pdef_bssgp, pdu_type)); |
| return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| } |
| |
| if (!(bssgp_pdu_type_flags(pdu_type) & BSSGP_PDUF_UL)) { |
| LOGP(DGPRS, LOGL_NOTICE, "%s %s not allowed in uplink direction\n", log_pfx, |
| osmo_tlv_prot_msg_name(&osmo_pdef_bssgp, pdu_type)); |
| return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| } |
| |
| rc = osmo_tlv_prot_parse(&osmo_pdef_bssgp, &tp, 1, pdu_type, bgph->data, data_len, 0, 0, |
| DGPRS, log_pfx); |
| if (rc < 0) { |
| rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_PROTO_ERR_BSS]); |
| return tx_status_from_tlvp(rc, msg); |
| } |
| |
| switch (pdu_type) { |
| case BSSGP_PDUT_SUSPEND: |
| case BSSGP_PDUT_RESUME: |
| /* We implement RAI snooping during SUSPEND/RESUME, since it |
| * establishes a relationsip between BVCI/bvc and the routeing |
| * area identification. The snooped information is then used |
| * for routing the {SUSPEND,RESUME}_[N]ACK back to the correct |
| * BSSGP */ |
| if (!TLVP_PRES_LEN(&tp, BSSGP_IE_ROUTEING_AREA, 6)) |
| goto err_mand_ie; |
| from_bvc = gbproxy_bvc_by_nsei(cfg, nsei); |
| if (!from_bvc) |
| goto err_no_bvc; |
| memcpy(from_bvc->ra, TLVP_VAL(&tp, BSSGP_IE_ROUTEING_AREA), |
| sizeof(from_bvc->ra)); |
| gsm48_parse_ra(&raid, from_bvc->ra); |
| LOGPBVC(from_bvc, LOGL_INFO, "BSSGP SUSPEND/RESUME " |
| "RAI snooping: RAI %s\n", |
| osmo_rai_name(&raid)); |
| /* FIXME: This only supports one BSS per RA */ |
| break; |
| case BSSGP_PDUT_BVC_RESET: |
| rc = gbprox_rx_bvc_reset_from_bss(cfg, msg, nsei, &tp); |
| /* if function retruns 0, we terminate processing here */ |
| if (rc == 0) |
| return 0; |
| break; |
| } |
| |
| return gbprox_relay2sgsn(cfg, msg, ns_bvci, cfg->nsip_sgsn_nsei); |
| err_no_bvc: |
| LOGP(DGPRS, LOGL_ERROR, "NSE(%05u/BSS) cannot find bvc based on NSEI\n", |
| nsei); |
| rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_NSEI]); |
| return bssgp_tx_status(BSSGP_CAUSE_INV_MAND_INF, NULL, msg); |
| err_mand_ie: |
| LOGP(DGPRS, LOGL_ERROR, "NSE(%05u/BSS) missing mandatory RA IE\n", |
| nsei); |
| rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_PROTO_ERR_BSS]); |
| return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); |
| } |
| |
| /* Receive paging request from SGSN, we need to relay to proper BSS */ |
| static int gbprox_rx_paging(struct gbproxy_config *cfg, struct msgb *msg, struct tlv_parsed *tp, |
| uint32_t nsei, uint16_t ns_bvci) |
| { |
| struct gbproxy_nse *nse; |
| struct gbproxy_bvc *bvc; |
| unsigned int n_nses = 0; |
| int errctr = GBPROX_GLOB_CTR_PROTO_ERR_SGSN; |
| int i, j; |
| |
| /* FIXME: Handle paging logic to only page each matching NSE */ |
| |
| LOGP(DGPRS, LOGL_INFO, "NSE(%05u/SGSN) BSSGP PAGING\n", |
| nsei); |
| if (TLVP_PRES_LEN(tp, BSSGP_IE_BVCI, 2)) { |
| uint16_t bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); |
| errctr = GBPROX_GLOB_CTR_OTHER_ERR; |
| bvc = gbproxy_bvc_by_bvci(cfg, bvci); |
| if (!bvc) { |
| LOGP(DGPRS, LOGL_NOTICE, "NSE(%05u/SGSN) BSSGP PAGING: " |
| "unable to route: BVCI=%05u unknown\n", nsei, bvci); |
| rate_ctr_inc(&cfg->ctrg->ctr[errctr]); |
| return -EINVAL; |
| } |
| LOGPBVC(bvc, LOGL_INFO, "routing by BVCI\n"); |
| return gbprox_relay2peer(msg, bvc, ns_bvci); |
| } else if (TLVP_PRES_LEN(tp, BSSGP_IE_ROUTEING_AREA, 6)) { |
| errctr = GBPROX_GLOB_CTR_INV_RAI; |
| /* iterate over all bvcs and dispatch the paging to each matching one */ |
| hash_for_each(cfg->bss_nses, i, nse, list) { |
| hash_for_each(nse->bvcs, j, bvc, list) { |
| if (!memcmp(bvc->ra, TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA), 6)) { |
| LOGPNSE(nse, LOGL_INFO, "routing to NSE (RAI match)\n"); |
| gbprox_relay2peer(msg, bvc, ns_bvci); |
| n_nses++; |
| /* Only send it once to each NSE */ |
| break; |
| } |
| } |
| } |
| } else if (TLVP_PRES_LEN(tp, BSSGP_IE_LOCATION_AREA, 5)) { |
| errctr = GBPROX_GLOB_CTR_INV_LAI; |
| /* iterate over all bvcs and dispatch the paging to each matching one */ |
| hash_for_each(cfg->bss_nses, i, nse, list) { |
| hash_for_each(nse->bvcs, j, bvc, list) { |
| if (!memcmp(bvc->ra, TLVP_VAL(tp, BSSGP_IE_LOCATION_AREA), 5)) { |
| LOGPNSE(nse, LOGL_INFO, "routing to NSE (LAI match)\n"); |
| gbprox_relay2peer(msg, bvc, ns_bvci); |
| n_nses++; |
| /* Only send it once to each NSE */ |
| break; |
| } |
| } |
| } |
| } else if (TLVP_PRES_LEN(tp, BSSGP_IE_BSS_AREA_ID, 1)) { |
| /* iterate over all bvcs and dispatch the paging to each matching one */ |
| hash_for_each(cfg->bss_nses, i, nse, list) { |
| hash_for_each(nse->bvcs, j, bvc, list) { |
| LOGPNSE(nse, LOGL_INFO, "routing to NSE (broadcast)\n"); |
| gbprox_relay2peer(msg, bvc, ns_bvci); |
| n_nses++; |
| /* Only send it once to each NSE */ |
| break; |
| } |
| } |
| } else { |
| LOGP(DGPRS, LOGL_ERROR, "NSE(%05u/SGSN) BSSGP PAGING: " |
| "unable to route, missing IE\n", nsei); |
| rate_ctr_inc(&cfg->ctrg->ctr[errctr]); |
| } |
| |
| if (n_nses == 0) { |
| LOGP(DGPRS, LOGL_ERROR, "NSE(%05u/SGSN) BSSGP PAGING: " |
| "unable to route, no destination found\n", nsei); |
| rate_ctr_inc(&cfg->ctrg->ctr[errctr]); |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| /* Receive an incoming BVC-RESET message from the SGSN */ |
| static int rx_reset_from_sgsn(struct gbproxy_config *cfg, |
| struct msgb *orig_msg, |
| struct msgb *msg, struct tlv_parsed *tp, |
| uint32_t nsei, uint16_t ns_bvci) |
| { |
| struct gbproxy_nse *nse; |
| struct gbproxy_bvc *bvc; |
| uint16_t ptp_bvci; |
| int i, j; |
| |
| if (!TLVP_PRES_LEN(tp, BSSGP_IE_BVCI, 2)) { |
| rate_ctr_inc(&cfg->ctrg-> |
| ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); |
| return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, |
| NULL, orig_msg); |
| } |
| ptp_bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); |
| |
| if (ptp_bvci >= 2) { |
| /* A reset for a PTP BVC was received, forward it to its |
| * respective bvc */ |
| bvc = gbproxy_bvc_by_bvci(cfg, ptp_bvci); |
| if (!bvc) { |
| LOGP(DGPRS, LOGL_ERROR, "NSE(%05u/SGSN) BVCI=%05u: Cannot find BSS\n", |
| nsei, ptp_bvci); |
| rate_ctr_inc(&cfg->ctrg-> |
| ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
| return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, |
| &ptp_bvci, orig_msg); |
| } |
| return gbprox_relay2peer(msg, bvc, ns_bvci); |
| } |
| |
| /* A reset for the Signalling entity has been received |
| * from the SGSN. As the signalling BVCI is shared |
| * among all the BSS's that we multiplex, it needs to |
| * be relayed */ |
| hash_for_each(cfg->bss_nses, i, nse, list) { |
| hash_for_each(nse->bvcs, j, bvc, list) |
| gbprox_relay2peer(msg, bvc, ns_bvci); |
| } |
| |
| return 0; |
| } |
| |
| /* Receive an incoming signalling message from the SGSN-side NS-VC */ |
| static int gbprox_rx_sig_from_sgsn(struct gbproxy_config *cfg, |
| struct msgb *orig_msg, uint32_t nsei, |
| uint16_t ns_bvci) |
| { |
| struct bssgp_normal_hdr *bgph = |
| (struct bssgp_normal_hdr *) msgb_bssgph(orig_msg); |
| struct tlv_parsed tp; |
| uint8_t pdu_type = bgph->pdu_type; |
| int data_len; |
| struct gbproxy_nse *nse; |
| struct gbproxy_bvc *bvc; |
| uint16_t bvci; |
| struct msgb *msg; |
| char log_pfx[32]; |
| int rc = 0; |
| int cause; |
| int i; |
| |
| snprintf(log_pfx, sizeof(log_pfx), "NSE(%05u/SGSN)", nsei); |
| |
| if (ns_bvci != 0 && ns_bvci != 1) { |
| LOGP(DGPRS, LOGL_NOTICE, "%s BVCI=%05u is not signalling\n", log_pfx, ns_bvci); |
| return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, orig_msg); |
| } |
| |
| if (!(bssgp_pdu_type_flags(pdu_type) & BSSGP_PDUF_SIG)) { |
| LOGP(DGPRS, LOGL_NOTICE, "%s %s not allowed in signalling BVC\n", log_pfx, |
| osmo_tlv_prot_msg_name(&osmo_pdef_bssgp, pdu_type)); |
| return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, orig_msg); |
| } |
| |
| if (!(bssgp_pdu_type_flags(pdu_type) & BSSGP_PDUF_DL)) { |
| LOGP(DGPRS, LOGL_NOTICE, "%s %s not allowed in downlink direction\n", log_pfx, |
| osmo_tlv_prot_msg_name(&osmo_pdef_bssgp, pdu_type)); |
| return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, orig_msg); |
| } |
| |
| msg = bssgp_msgb_copy(orig_msg, "rx_sig_from_sgsn"); |
| /* Update message info */ |
| bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
| data_len = msgb_bssgp_len(orig_msg) - sizeof(*bgph); |
| |
| rc = osmo_tlv_prot_parse(&osmo_pdef_bssgp, &tp, 1, pdu_type, bgph->data, data_len, 0, 0, |
| DGPRS, log_pfx); |
| if (rc < 0) { |
| rc = tx_status_from_tlvp(rc, msg); |
| msgb_free(msg); |
| rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); |
| return rc; |
| } |
| |
| switch (pdu_type) { |
| case BSSGP_PDUT_BVC_RESET: |
| rc = rx_reset_from_sgsn(cfg, msg, orig_msg, &tp, nsei, ns_bvci); |
| break; |
| case BSSGP_PDUT_BVC_RESET_ACK: |
| /* simple case: BVCI IE is mandatory */ |
| if (!TLVP_PRES_LEN(&tp, BSSGP_IE_BVCI, 2)) |
| goto err_mand_ie; |
| bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
| if (bvci == BVCI_SIGNALLING) { |
| /* TODO: Reset all PTP BVCIs */ |
| } else { |
| rc = gbprox_relay2bvci(cfg, msg, bvci, ns_bvci); |
| } |
| break; |
| case BSSGP_PDUT_FLUSH_LL: |
| /* simple case: BVCI IE is mandatory */ |
| if (!TLVP_PRES_LEN(&tp, BSSGP_IE_BVCI, 2)) |
| goto err_mand_ie; |
| bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
| rc = gbprox_relay2bvci(cfg, msg, bvci, ns_bvci); |
| break; |
| case BSSGP_PDUT_PAGING_PS: |
| case BSSGP_PDUT_PAGING_CS: |
| /* process the paging request (LAI/RAI lookup) */ |
| rc = gbprox_rx_paging(cfg, msg, &tp, nsei, ns_bvci); |
| break; |
| case BSSGP_PDUT_STATUS: |
| /* Some exception has occurred */ |
| LOGP(DGPRS, LOGL_NOTICE, |
| "NSE(%05u/SGSN) BSSGP STATUS ", nsei); |
| if (!TLVP_PRES_LEN(&tp, BSSGP_IE_CAUSE, 1)) { |
| LOGPC(DGPRS, LOGL_NOTICE, "\n"); |
| goto err_mand_ie; |
| } |
| cause = *TLVP_VAL(&tp, BSSGP_IE_CAUSE); |
| LOGPC(DGPRS, LOGL_NOTICE, |
| "cause=0x%02x(%s) ", *TLVP_VAL(&tp, BSSGP_IE_CAUSE), |
| bssgp_cause_str(cause)); |
| if (TLVP_PRES_LEN(&tp, BSSGP_IE_BVCI, 2)) { |
| bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
| LOGPC(DGPRS, LOGL_NOTICE, "BVCI=%05u\n", bvci); |
| |
| if (cause == BSSGP_CAUSE_UNKNOWN_BVCI) |
| rc = gbprox_relay2bvci(cfg, msg, bvci, ns_bvci); |
| } else |
| LOGPC(DGPRS, LOGL_NOTICE, "\n"); |
| break; |
| /* those only exist in the SGSN -> BSS direction */ |
| case BSSGP_PDUT_SUSPEND_ACK: |
| case BSSGP_PDUT_SUSPEND_NACK: |
| case BSSGP_PDUT_RESUME_ACK: |
| case BSSGP_PDUT_RESUME_NACK: |
| /* RAI IE is mandatory */ |
| if (!TLVP_PRES_LEN(&tp, BSSGP_IE_ROUTEING_AREA, 6)) |
| goto err_mand_ie; |
| bvc = gbproxy_bvc_by_rai(cfg, TLVP_VAL(&tp, BSSGP_IE_ROUTEING_AREA)); |
| if (!bvc) |
| goto err_no_bvc; |
| rc = gbprox_relay2peer(msg, bvc, ns_bvci); |
| break; |
| case BSSGP_PDUT_BVC_BLOCK_ACK: |
| case BSSGP_PDUT_BVC_UNBLOCK_ACK: |
| if (!TLVP_PRES_LEN(&tp, BSSGP_IE_BVCI, 2)) |
| goto err_mand_ie; |
| bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
| if (bvci == 0) { |
| LOGP(DGPRS, LOGL_NOTICE, "NSE(%05u/SGSN) BSSGP " |
| "%sBLOCK_ACK for signalling BVCI ?!?\n", nsei, |
| pdu_type == BSSGP_PDUT_BVC_UNBLOCK_ACK ? "UN":""); |
| /* TODO: should we send STATUS ? */ |
| rate_ctr_inc(&cfg->ctrg-> |
| ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
| } else { |
| /* Mark BVC as (un)blocked */ |
| block_unblock_bvc(cfg, bvci, pdu_type); |
| } |
| rc = gbprox_relay2bvci(cfg, msg, bvci, ns_bvci); |
| break; |
| case BSSGP_PDUT_SGSN_INVOKE_TRACE: |
| case BSSGP_PDUT_OVERLOAD: |
| LOGP(DGPRS, LOGL_DEBUG, |
| "NSE(%05u/SGSN) BSSGP %s: broadcasting\n", nsei, bssgp_pdu_str(pdu_type)); |
| /* broadcast to all BSS-side bvcs */ |
| hash_for_each(cfg->bss_nses, i, nse, list) { |
| gbprox_relay2nse(msg, nse, 0); |
| } |
| break; |
| default: |
| LOGP(DGPRS, LOGL_NOTICE, "NSE(%05u/SGSN) BSSGP PDU type %s not supported\n", nsei, |
| bssgp_pdu_str(pdu_type)); |
| rate_ctr_inc(&cfg->ctrg-> |
| ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); |
| rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, orig_msg); |
| break; |
| } |
| |
| msgb_free(msg); |
| |
| return rc; |
| err_mand_ie: |
| LOGP(DGPRS, LOGL_ERROR, "NSE(%05u/SGSN) missing mandatory IE\n", |
| nsei); |
| rate_ctr_inc(&cfg->ctrg-> |
| ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); |
| msgb_free(msg); |
| return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, orig_msg); |
| err_no_bvc: |
| LOGP(DGPRS, LOGL_ERROR, "NSE(%05u/SGSN) cannot find bvc based on RAI\n", |
| nsei); |
| rate_ctr_inc(&cfg->ctrg-> ctr[GBPROX_GLOB_CTR_INV_RAI]); |
| msgb_free(msg); |
| return bssgp_tx_status(BSSGP_CAUSE_INV_MAND_INF, NULL, orig_msg); |
| } |
| |
| int gbprox_bssgp_send_cb(void *ctx, struct msgb *msg) |
| { |
| int rc; |
| struct gbproxy_config *cfg = (struct gbproxy_config *) ctx; |
| struct gprs_ns2_inst *nsi = cfg->nsi; |
| struct osmo_gprs_ns2_prim nsp = {}; |
| |
| nsp.bvci = msgb_bvci(msg); |
| nsp.nsei = msgb_nsei(msg); |
| |
| osmo_prim_init(&nsp.oph, SAP_NS, PRIM_NS_UNIT_DATA, PRIM_OP_REQUEST, msg); |
| rc = gprs_ns2_recv_prim(nsi, &nsp.oph); |
| |
| return rc; |
| } |
| |
| /* Main input function for Gb proxy */ |
| int gbprox_rcvmsg(void *ctx, struct msgb *msg) |
| { |
| int rc; |
| uint16_t nsei = msgb_nsei(msg); |
| uint16_t ns_bvci = msgb_bvci(msg); |
| struct gbproxy_config *cfg = (struct gbproxy_config *) ctx; |
| |
| int remote_end_is_sgsn = gbproxy_is_sgsn_nsei(cfg, nsei); |
| |
| /* ensure minimum length to decode PCU type */ |
| if (msgb_bssgp_len(msg) < sizeof(struct bssgp_normal_hdr)) |
| return bssgp_tx_status(BSSGP_CAUSE_SEM_INCORR_PDU, NULL, msg); |
| |
| /* Only BVCI=0 messages need special treatment */ |
| if (ns_bvci == 0 || ns_bvci == 1) { |
| if (remote_end_is_sgsn) |
| rc = gbprox_rx_sig_from_sgsn(cfg, msg, nsei, ns_bvci); |
| else |
| rc = gbprox_rx_sig_from_bss(cfg, msg, nsei, ns_bvci); |
| } else { |
| /* All other BVCI are PTP */ |
| if (remote_end_is_sgsn) |
| rc = gbprox_rx_ptp_from_sgsn(cfg, msg, nsei, |
| ns_bvci); |
| else |
| rc = gbprox_rx_ptp_from_bss(cfg, msg, nsei, |
| ns_bvci); |
| } |
| |
| return rc; |
| } |
| |
| /* TODO: What about handling: |
| * NS_AFF_CAUSE_VC_FAILURE, |
| NS_AFF_CAUSE_VC_RECOVERY, |
| NS_AFF_CAUSE_FAILURE, |
| NS_AFF_CAUSE_RECOVERY, |
| osmocom own causes |
| NS_AFF_CAUSE_SNS_CONFIGURED, |
| NS_AFF_CAUSE_SNS_FAILURE, |
| */ |
| |
| void gprs_ns_prim_status_cb(struct gbproxy_config *cfg, struct osmo_gprs_ns2_prim *nsp) |
| { |
| /* TODO: bss nsei available/unavailable bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_BLOCK, nsvc->nsei, bvc->bvci, 0); |
| * TODO: sgsn nsei available/unavailable |
| */ |
| struct gbproxy_bvc *bvc; |
| |
| switch (nsp->u.status.cause) { |
| case NS_AFF_CAUSE_SNS_FAILURE: |
| case NS_AFF_CAUSE_SNS_CONFIGURED: |
| break; |
| |
| case NS_AFF_CAUSE_RECOVERY: |
| LOGP(DPCU, LOGL_NOTICE, "NS-NSE %d became available\n", nsp->nsei); |
| if (gbproxy_is_sgsn_nsei(cfg, nsp->nsei)) { |
| /* look-up or create the BTS context for this BVC */ |
| struct bssgp_bvc_ctx *bctx = btsctx_by_bvci_nsei(nsp->bvci, nsp->nsei); |
| if (!bctx) |
| bctx = btsctx_alloc(nsp->bvci, nsp->nsei); |
| |
| bssgp_tx_bvc_reset_nsei_bvci(cfg->nsip_sgsn_nsei, 0, BSSGP_CAUSE_OML_INTERV, NULL, 0); |
| } |
| break; |
| case NS_AFF_CAUSE_FAILURE: |
| if (gbproxy_is_sgsn_nsei(cfg, nsp->nsei)) { |
| /* sgsn */ |
| /* TODO: BSVC: block all PtP towards bss */ |
| rate_ctr_inc(&cfg->ctrg-> |
| ctr[GBPROX_GLOB_CTR_RESTART_RESET_SGSN]); |
| } else { |
| /* bss became unavailable |
| * TODO: Block all BVC belonging to that NSE */ |
| bvc = gbproxy_bvc_by_nsei(cfg, nsp->nsei); |
| if (!bvc) { |
| /* TODO: use primitive name + status cause name */ |
| LOGP(DGPRS, LOGL_NOTICE, "Received ns2 primitive %d for unknown bvc NSEI=%u\n", |
| nsp->u.status.cause, nsp->nsei); |
| break; |
| } |
| |
| if (!bvc->blocked) |
| break; |
| bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_BLOCK, cfg->nsip_sgsn_nsei, |
| bvc->bvci, 0); |
| } |
| LOGP(DPCU, LOGL_NOTICE, "NS-NSE %d became unavailable\n", nsp->nsei); |
| break; |
| default: |
| LOGP(DPCU, LOGL_NOTICE, "NS: Unknown NS-STATUS.ind cause=%s from NS\n", |
| gprs_ns2_aff_cause_prim_str(nsp->u.status.cause)); |
| break; |
| } |
| } |
| |
| /* called by the ns layer */ |
| int gprs_ns2_prim_cb(struct osmo_prim_hdr *oph, void *ctx) |
| { |
| struct osmo_gprs_ns2_prim *nsp; |
| struct gbproxy_config *cfg = (struct gbproxy_config *) ctx; |
| uintptr_t bvci; |
| int rc = 0; |
| |
| if (oph->sap != SAP_NS) |
| return 0; |
| |
| nsp = container_of(oph, struct osmo_gprs_ns2_prim, oph); |
| |
| if (oph->operation != PRIM_OP_INDICATION) { |
| LOGP(DPCU, LOGL_NOTICE, "NS: Unexpected primitive operation %s from NS\n", |
| get_value_string(osmo_prim_op_names, oph->operation)); |
| return 0; |
| } |
| |
| switch (oph->primitive) { |
| case PRIM_NS_UNIT_DATA: |
| |
| /* hand the message into the BSSGP implementation */ |
| msgb_bssgph(oph->msg) = oph->msg->l3h; |
| msgb_bvci(oph->msg) = nsp->bvci; |
| msgb_nsei(oph->msg) = nsp->nsei; |
| bvci = nsp->bvci | BVC_LOG_CTX_FLAG; |
| |
| log_set_context(LOG_CTX_GB_BVC, (void *)bvci); |
| rc = gbprox_rcvmsg(cfg, oph->msg); |
| msgb_free(oph->msg); |
| break; |
| case PRIM_NS_STATUS: |
| gprs_ns_prim_status_cb(cfg, nsp); |
| break; |
| default: |
| LOGP(DPCU, LOGL_NOTICE, "NS: Unknown prim %s %s from NS\n", |
| gprs_ns2_prim_str(oph->primitive), |
| get_value_string(osmo_prim_op_names, oph->operation)); |
| break; |
| } |
| |
| return rc; |
| } |
| |
| void gbprox_reset(struct gbproxy_config *cfg) |
| { |
| struct gbproxy_nse *nse; |
| struct hlist_node *ntmp; |
| int i, j; |
| |
| hash_for_each_safe(cfg->bss_nses, i, ntmp, nse, list) { |
| struct gbproxy_bvc *bvc; |
| struct hlist_node *tmp; |
| hash_for_each_safe(nse->bvcs, j, tmp, bvc, list) |
| gbproxy_bvc_free(bvc); |
| |
| gbproxy_nse_free(nse); |
| } |
| |
| rate_ctr_group_free(cfg->ctrg); |
| gbproxy_init_config(cfg); |
| } |
| |
| int gbproxy_init_config(struct gbproxy_config *cfg) |
| { |
| struct timespec tp; |
| |
| hash_init(cfg->bss_nses); |
| cfg->ctrg = rate_ctr_group_alloc(tall_sgsn_ctx, &global_ctrg_desc, 0); |
| if (!cfg->ctrg) { |
| LOGP(DGPRS, LOGL_ERROR, "Cannot allocate global counter group!\n"); |
| return -1; |
| } |
| osmo_clock_gettime(CLOCK_REALTIME, &tp); |
| osmo_fsm_log_timeouts(true); |
| |
| return 0; |
| } |