/* Gb proxy peer handling */ /* (C) 2010 by Harald Welte * (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 . * */ #include #include #include #include #include #include #include #include #include static const struct rate_ctr_desc peer_ctr_description[] = { { "blocked", "BVC Block " }, { "unblocked", "BVC Unblock " }, { "dropped", "BVC blocked, dropped packet " }, { "inv-nsei", "NSEI mismatch " }, { "tx-err", "NS Transmission error " }, { "raid-mod.bss", "RAID patched (BSS )" }, { "raid-mod.sgsn", "RAID patched (SGSN)" }, { "apn-mod.sgsn", "APN patched " }, { "tlli-mod.bss", "TLLI patched (BSS )" }, { "tlli-mod.sgsn", "TLLI patched (SGSN)" }, { "ptmsi-mod.bss", "P-TMSI patched (BSS )" }, { "ptmsi-mod.sgsn","P-TMSI patched (SGSN)" }, { "mod-crypt-err", "Patch error: encrypted " }, { "mod-err", "Patch error: other " }, { "attach-reqs", "Attach Request count " }, { "attach-rejs", "Attach Reject count " }, { "attach-acks", "Attach Accept count " }, { "attach-cpls", "Attach Completed count " }, { "ra-upd-reqs", "RoutingArea Update Request count" }, { "ra-upd-rejs", "RoutingArea Update Reject count " }, { "ra-upd-acks", "RoutingArea Update Accept count " }, { "ra-upd-cpls", "RoutingArea Update Compltd count" }, { "gmm-status", "GMM Status count (BSS)" }, { "gmm-status", "GMM Status count (SGSN)" }, { "detach-reqs", "Detach Request count " }, { "detach-acks", "Detach Accept count " }, { "pdp-act-reqs", "PDP Activation Request count " }, { "pdp-act-rejs", "PDP Activation Reject count " }, { "pdp-act-acks", "PDP Activation Accept count " }, { "pdp-deact-reqs","PDP Deactivation Request count " }, { "pdp-deact-acks","PDP Deactivation Accept count " }, { "tlli-unknown", "TLLI from SGSN unknown " }, { "tlli-cache", "TLLI cache size " }, }; osmo_static_assert(ARRAY_SIZE(peer_ctr_description) == GBPROX_PEER_CTR_LAST, everything_described); static const struct rate_ctr_group_desc peer_ctrg_desc = { .group_name_prefix = "gbproxy.peer", .group_description = "GBProxy Peer Statistics", .num_ctr = ARRAY_SIZE(peer_ctr_description), .ctr_desc = peer_ctr_description, .class_id = OSMO_STATS_CLASS_PEER, }; /* Find the gbprox_peer by its BVCI */ struct gbproxy_peer *gbproxy_peer_by_bvci(struct gbproxy_config *cfg, uint16_t bvci) { struct gbproxy_peer *peer; llist_for_each_entry(peer, &cfg->bts_peers, list) { if (peer->bvci == bvci) return peer; } return NULL; } /* Find the gbprox_peer by its NSEI */ struct gbproxy_peer *gbproxy_peer_by_nsei(struct gbproxy_config *cfg, uint16_t nsei) { struct gbproxy_peer *peer; llist_for_each_entry(peer, &cfg->bts_peers, list) { if (peer->nsei == nsei) return peer; } return NULL; } /* look-up a peer by its Routeing Area Identification (RAI) */ struct gbproxy_peer *gbproxy_peer_by_rai(struct gbproxy_config *cfg, const uint8_t *ra) { struct gbproxy_peer *peer; llist_for_each_entry(peer, &cfg->bts_peers, list) { if (!memcmp(peer->ra, ra, 6)) return peer; } return NULL; } /* look-up a peer by its Location Area Identification (LAI) */ struct gbproxy_peer *gbproxy_peer_by_lai(struct gbproxy_config *cfg, const uint8_t *la) { struct gbproxy_peer *peer; llist_for_each_entry(peer, &cfg->bts_peers, list) { if (!memcmp(peer->ra, la, 5)) return peer; } return NULL; } /* look-up a peer by its Location Area Code (LAC) */ struct gbproxy_peer *gbproxy_peer_by_lac(struct gbproxy_config *cfg, const uint8_t *la) { struct gbproxy_peer *peer; llist_for_each_entry(peer, &cfg->bts_peers, list) { if (!memcmp(peer->ra + 3, la + 3, 2)) return peer; } return NULL; } struct gbproxy_peer *gbproxy_peer_by_bssgp_tlv(struct gbproxy_config *cfg, struct tlv_parsed *tp) { if (TLVP_PRESENT(tp, BSSGP_IE_BVCI)) { uint16_t bvci; bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); if (bvci >= 2) return gbproxy_peer_by_bvci(cfg, bvci); } if (TLVP_PRESENT(tp, BSSGP_IE_ROUTEING_AREA)) { uint8_t *rai = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA); /* Only compare LAC part, since MCC/MNC are possibly patched. * Since the LAC of different BSS must be different when * MCC/MNC are patched, collisions shouldn't happen. */ return gbproxy_peer_by_lac(cfg, rai); } if (TLVP_PRESENT(tp, BSSGP_IE_LOCATION_AREA)) { uint8_t *lai = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_LOCATION_AREA); return gbproxy_peer_by_lac(cfg, lai); } return NULL; } struct gbproxy_peer *gbproxy_peer_alloc(struct gbproxy_config *cfg, uint16_t bvci) { struct gbproxy_peer *peer; peer = talloc_zero(tall_bsc_ctx, struct gbproxy_peer); if (!peer) return NULL; peer->bvci = bvci; peer->ctrg = rate_ctr_group_alloc(peer, &peer_ctrg_desc, bvci); peer->cfg = cfg; llist_add(&peer->list, &cfg->bts_peers); INIT_LLIST_HEAD(&peer->patch_state.logical_links); return peer; } void gbproxy_peer_free(struct gbproxy_peer *peer) { llist_del(&peer->list); gbproxy_delete_link_infos(peer); rate_ctr_group_free(peer->ctrg); peer->ctrg = NULL; talloc_free(peer); } int gbproxy_cleanup_peers(struct gbproxy_config *cfg, uint16_t nsei, uint16_t bvci) { int counter = 0; struct gbproxy_peer *peer, *tmp; llist_for_each_entry_safe(peer, tmp, &cfg->bts_peers, list) { if (peer->nsei != nsei) continue; if (bvci && peer->bvci != bvci) continue; gbproxy_peer_free(peer); counter += 1; } return counter; }