Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1 | /* NS-over-IP proxy */ |
| 2 | |
| 3 | /* (C) 2010 by Harald Welte <laforge@gnumonks.org> |
Holger Hans Peter Freyther | 90267a9 | 2013-10-23 11:24:17 +0200 | [diff] [blame] | 4 | * (C) 2010-2013 by On-Waves |
| 5 | * (C) 2013 by Holger Hans Peter Freyther |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 6 | * All Rights Reserved |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 9 | * it under the terms of the GNU Affero General Public License as published by |
| 10 | * the Free Software Foundation; either version 3 of the License, or |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 16 | * GNU Affero General Public License for more details. |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 17 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 18 | * You should have received a copy of the GNU Affero General Public License |
| 19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <unistd.h> |
| 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <string.h> |
| 27 | #include <getopt.h> |
| 28 | #include <errno.h> |
| 29 | #include <sys/fcntl.h> |
| 30 | #include <sys/stat.h> |
Harald Welte | 7fc9822 | 2010-05-11 10:15:42 +0200 | [diff] [blame] | 31 | #include <arpa/inet.h> |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 32 | #include <time.h> |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 33 | |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 34 | #include <osmocom/core/talloc.h> |
| 35 | #include <osmocom/core/select.h> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 36 | #include <osmocom/core/rate_ctr.h> |
| 37 | |
Harald Welte | ea34a4e | 2012-06-16 14:59:56 +0800 | [diff] [blame] | 38 | #include <osmocom/gprs/gprs_ns.h> |
| 39 | #include <osmocom/gprs/gprs_bssgp.h> |
| 40 | |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 41 | #include <osmocom/gsm/gsm_utils.h> |
| 42 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 43 | #include <openbsc/signal.h> |
| 44 | #include <openbsc/debug.h> |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame^] | 45 | #include <openbsc/gprs_gb_parse.h> |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 46 | #include <openbsc/gb_proxy.h> |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 47 | |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 48 | #include <openbsc/gprs_llc.h> |
| 49 | #include <openbsc/gsm_04_08.h> |
| 50 | #include <openbsc/gsm_04_08_gprs.h> |
Holger Hans Peter Freyther | 7127b02 | 2014-08-04 11:52:52 +0200 | [diff] [blame] | 51 | #include <openbsc/gprs_utils.h> |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 52 | |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 53 | static const struct rate_ctr_desc global_ctr_description[] = { |
| 54 | { "inv-bvci", "Invalid BVC Identifier " }, |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 55 | { "inv-lai", "Invalid Location Area Identifier" }, |
| 56 | { "inv-rai", "Invalid Routing Area Identifier " }, |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 57 | { "inv-nsei", "No BVC established for NSEI " }, |
| 58 | { "proto-err.bss", "BSSGP protocol error (BSS )" }, |
| 59 | { "proto-err.sgsn", "BSSGP protocol error (SGSN)" }, |
| 60 | { "not-supp.bss", "Feature not supported (BSS )" }, |
| 61 | { "not-supp.sgsn", "Feature not supported (SGSN)" }, |
| 62 | { "restart.sgsn", "Restarted RESET procedure (SGSN)" }, |
| 63 | { "tx-err.sgsn", "NS Transmission error (SGSN)" }, |
| 64 | { "error", "Other error " }, |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 65 | { "mod-peer-err", "Patch error: no peer " }, |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 66 | }; |
| 67 | |
| 68 | static const struct rate_ctr_group_desc global_ctrg_desc = { |
| 69 | .group_name_prefix = "gbproxy.global", |
| 70 | .group_description = "GBProxy Global Statistics", |
| 71 | .num_ctr = ARRAY_SIZE(global_ctr_description), |
| 72 | .ctr_desc = global_ctr_description, |
| 73 | }; |
| 74 | |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 75 | static const struct rate_ctr_desc peer_ctr_description[] = { |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 76 | { "blocked", "BVC Block " }, |
| 77 | { "unblocked", "BVC Unblock " }, |
| 78 | { "dropped", "BVC blocked, dropped packet " }, |
| 79 | { "inv-nsei", "NSEI mismatch " }, |
| 80 | { "tx-err", "NS Transmission error " }, |
| 81 | { "raid-mod.bss", "RAID patched (BSS )" }, |
| 82 | { "raid-mod.sgsn", "RAID patched (SGSN)" }, |
| 83 | { "apn-mod.sgsn", "APN patched " }, |
Jacob Erlbeck | 03ca10e | 2014-08-18 17:23:01 +0200 | [diff] [blame] | 84 | { "tlli-mod.bss", "TLLI patched (BSS )" }, |
| 85 | { "tlli-mod.sgsn", "TLLI patched (SGSN)" }, |
| 86 | { "ptmsi-mod.bss", "P-TMSI patched (BSS )" }, |
| 87 | { "ptmsi-mod.sgsn","P-TMSI patched (SGSN)" }, |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 88 | { "mod-crypt-err", "Patch error: encrypted " }, |
| 89 | { "mod-err", "Patch error: other " }, |
Jacob Erlbeck | 25049b9 | 2014-06-27 10:44:46 +0200 | [diff] [blame] | 90 | { "attach-reqs", "Attach Request count " }, |
| 91 | { "attach-rejs", "Attach Reject count " }, |
Jacob Erlbeck | 03ca10e | 2014-08-18 17:23:01 +0200 | [diff] [blame] | 92 | { "tlli-unknown", "TLLI from SGSN unknown " }, |
Jacob Erlbeck | 25049b9 | 2014-06-27 10:44:46 +0200 | [diff] [blame] | 93 | { "tlli-cache", "TLLI cache size " }, |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 94 | }; |
| 95 | |
| 96 | static const struct rate_ctr_group_desc peer_ctrg_desc = { |
| 97 | .group_name_prefix = "gbproxy.peer", |
| 98 | .group_description = "GBProxy Peer Statistics", |
| 99 | .num_ctr = ARRAY_SIZE(peer_ctr_description), |
| 100 | .ctr_desc = peer_ctr_description, |
| 101 | }; |
| 102 | |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 103 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 104 | /* Find the gbprox_peer by its BVCI */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 105 | static struct gbproxy_peer *peer_by_bvci(struct gbproxy_config *cfg, uint16_t bvci) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 106 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 107 | struct gbproxy_peer *peer; |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 108 | llist_for_each_entry(peer, &cfg->bts_peers, list) { |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 109 | if (peer->bvci == bvci) |
| 110 | return peer; |
| 111 | } |
| 112 | return NULL; |
| 113 | } |
| 114 | |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 115 | /* Find the gbprox_peer by its NSEI */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 116 | struct gbproxy_peer *gbprox_peer_by_nsei(struct gbproxy_config *cfg, uint16_t nsei) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 117 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 118 | struct gbproxy_peer *peer; |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 119 | llist_for_each_entry(peer, &cfg->bts_peers, list) { |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 120 | if (peer->nsei == nsei) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 121 | return peer; |
| 122 | } |
| 123 | return NULL; |
| 124 | } |
| 125 | |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 126 | /* look-up a peer by its Routeing Area Identification (RAI) */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 127 | static struct gbproxy_peer *peer_by_rai(struct gbproxy_config *cfg, const uint8_t *ra) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 128 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 129 | struct gbproxy_peer *peer; |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 130 | llist_for_each_entry(peer, &cfg->bts_peers, list) { |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 131 | if (!memcmp(peer->ra, ra, 6)) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 132 | return peer; |
| 133 | } |
| 134 | return NULL; |
| 135 | } |
| 136 | |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 137 | /* look-up a peer by its Location Area Identification (LAI) */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 138 | static struct gbproxy_peer *peer_by_lai(struct gbproxy_config *cfg, const uint8_t *la) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 139 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 140 | struct gbproxy_peer *peer; |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 141 | llist_for_each_entry(peer, &cfg->bts_peers, list) { |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 142 | if (!memcmp(peer->ra, la, 5)) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 143 | return peer; |
| 144 | } |
| 145 | return NULL; |
| 146 | } |
| 147 | |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 148 | /* look-up a peer by its Location Area Code (LAC) */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 149 | static struct gbproxy_peer *peer_by_lac(struct gbproxy_config *cfg, const uint8_t *la) |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 150 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 151 | struct gbproxy_peer *peer; |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 152 | llist_for_each_entry(peer, &cfg->bts_peers, list) { |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 153 | if (!memcmp(peer->ra + 3, la + 3, 2)) |
| 154 | return peer; |
| 155 | } |
| 156 | return NULL; |
| 157 | } |
| 158 | |
| 159 | |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 160 | static int check_peer_nsei(struct gbproxy_peer *peer, uint16_t nsei) |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 161 | { |
| 162 | if (peer->nsei != nsei) { |
| 163 | LOGP(DGPRS, LOGL_NOTICE, "Peer entry doesn't match current NSEI " |
| 164 | "BVCI=%u via NSEI=%u (expected NSEI=%u)\n", |
| 165 | peer->bvci, nsei, peer->nsei); |
| 166 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_INV_NSEI]); |
Jacob Erlbeck | 64cb924 | 2013-10-24 12:48:56 +0200 | [diff] [blame] | 167 | return 0; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 168 | } |
| 169 | |
Jacob Erlbeck | 64cb924 | 2013-10-24 12:48:56 +0200 | [diff] [blame] | 170 | return 1; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 171 | } |
| 172 | |
Holger Hans Peter Freyther | 0196c99 | 2014-08-04 17:10:08 +0200 | [diff] [blame] | 173 | struct gbproxy_peer *gbproxy_peer_alloc(struct gbproxy_config *cfg, uint16_t bvci) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 174 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 175 | struct gbproxy_peer *peer; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 176 | |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 177 | peer = talloc_zero(tall_bsc_ctx, struct gbproxy_peer); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 178 | if (!peer) |
| 179 | return NULL; |
| 180 | |
| 181 | peer->bvci = bvci; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 182 | peer->ctrg = rate_ctr_group_alloc(peer, &peer_ctrg_desc, bvci); |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 183 | peer->cfg = cfg; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 184 | |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 185 | llist_add(&peer->list, &cfg->bts_peers); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 186 | |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 187 | INIT_LLIST_HEAD(&peer->patch_state.enabled_tllis); |
| 188 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 189 | return peer; |
| 190 | } |
| 191 | |
Holger Hans Peter Freyther | 0196c99 | 2014-08-04 17:10:08 +0200 | [diff] [blame] | 192 | void gbproxy_peer_free(struct gbproxy_peer *peer) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 193 | { |
| 194 | llist_del(&peer->list); |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 195 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame^] | 196 | gbproxy_delete_tllis(peer); |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 197 | |
Jacob Erlbeck | aad32bc | 2014-08-07 17:23:00 +0200 | [diff] [blame] | 198 | rate_ctr_group_free(peer->ctrg); |
| 199 | peer->ctrg = NULL; |
| 200 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 201 | talloc_free(peer); |
| 202 | } |
| 203 | |
Harald Welte | 69619e3 | 2010-05-03 19:05:10 +0200 | [diff] [blame] | 204 | /* strip off the NS header */ |
| 205 | static void strip_ns_hdr(struct msgb *msg) |
| 206 | { |
| 207 | int strip_len = msgb_bssgph(msg) - msg->data; |
| 208 | msgb_pull(msg, strip_len); |
| 209 | } |
| 210 | |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 211 | /* update peer according to the BSS message */ |
| 212 | static void gbprox_update_current_raid(uint8_t *raid_enc, |
| 213 | struct gbproxy_peer *peer, |
| 214 | const char *log_text) |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 215 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 216 | struct gbproxy_patch_state *state = &peer->patch_state; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 217 | const int old_local_mcc = state->local_mcc; |
| 218 | const int old_local_mnc = state->local_mnc; |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 219 | struct gprs_ra_id raid; |
| 220 | |
| 221 | if (!raid_enc) |
| 222 | return; |
| 223 | |
| 224 | gsm48_parse_ra(&raid, raid_enc); |
| 225 | |
| 226 | /* save source side MCC/MNC */ |
| 227 | if (!peer->cfg->core_mcc || raid.mcc == peer->cfg->core_mcc) { |
| 228 | state->local_mcc = 0; |
| 229 | } else { |
| 230 | state->local_mcc = raid.mcc; |
| 231 | } |
| 232 | |
| 233 | if (!peer->cfg->core_mnc || raid.mnc == peer->cfg->core_mnc) { |
| 234 | state->local_mnc = 0; |
| 235 | } else { |
| 236 | state->local_mnc = raid.mnc; |
| 237 | } |
| 238 | |
| 239 | if (old_local_mcc != state->local_mcc || |
| 240 | old_local_mnc != state->local_mnc) |
| 241 | LOGP(DGPRS, LOGL_NOTICE, |
| 242 | "Patching RAID %sactivated, msg: %s, " |
| 243 | "local: %d-%d, core: %d-%d\n", |
| 244 | state->local_mcc || state->local_mnc ? |
| 245 | "" : "de", |
| 246 | log_text, |
| 247 | state->local_mcc, state->local_mnc, |
| 248 | peer->cfg->core_mcc, peer->cfg->core_mnc); |
| 249 | } |
| 250 | |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 251 | struct gbproxy_peer *peer_by_bssgp_tlv(struct gbproxy_config *cfg, struct tlv_parsed *tp) |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 252 | { |
| 253 | if (TLVP_PRESENT(tp, BSSGP_IE_BVCI)) { |
| 254 | uint16_t bvci; |
| 255 | |
| 256 | bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); |
| 257 | if (bvci >= 2) |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 258 | return peer_by_bvci(cfg, bvci); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 259 | } |
| 260 | |
| 261 | if (TLVP_PRESENT(tp, BSSGP_IE_ROUTEING_AREA)) { |
| 262 | uint8_t *rai = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA); |
| 263 | /* Only compare LAC part, since MCC/MNC are possibly patched. |
| 264 | * Since the LAC of different BSS must be different when |
| 265 | * MCC/MNC are patched, collisions shouldn't happen. */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 266 | return peer_by_lac(cfg, rai); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 267 | } |
| 268 | |
| 269 | if (TLVP_PRESENT(tp, BSSGP_IE_LOCATION_AREA)) { |
| 270 | uint8_t *lai = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_LOCATION_AREA); |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 271 | return peer_by_lac(cfg, lai); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 272 | } |
| 273 | |
| 274 | return NULL; |
| 275 | } |
| 276 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame^] | 277 | uint32_t gbproxy_make_bss_ptmsi(struct gbproxy_peer *peer, |
| 278 | uint32_t sgsn_ptmsi) |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 279 | { |
Jacob Erlbeck | 0d37671 | 2014-08-11 19:12:24 +0200 | [diff] [blame] | 280 | uint32_t bss_ptmsi; |
| 281 | if (!peer->cfg->patch_ptmsi) { |
| 282 | bss_ptmsi = sgsn_ptmsi; |
| 283 | } else { |
| 284 | do { |
| 285 | bss_ptmsi = rand_r(&peer->cfg->bss_ptmsi_state); |
| 286 | bss_ptmsi = bss_ptmsi | 0xC0000000; |
| 287 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame^] | 288 | if (gbproxy_find_tlli_by_ptmsi(peer, bss_ptmsi)) |
Jacob Erlbeck | 0d37671 | 2014-08-11 19:12:24 +0200 | [diff] [blame] | 289 | bss_ptmsi = GSM_RESERVED_TMSI; |
| 290 | } while (bss_ptmsi == GSM_RESERVED_TMSI); |
| 291 | } |
| 292 | |
| 293 | return bss_ptmsi; |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 294 | } |
| 295 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame^] | 296 | uint32_t gbproxy_make_sgsn_tlli(struct gbproxy_peer *peer, |
| 297 | struct gbproxy_tlli_info *tlli_info, |
| 298 | uint32_t bss_tlli) |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 299 | { |
Jacob Erlbeck | 0d37671 | 2014-08-11 19:12:24 +0200 | [diff] [blame] | 300 | uint32_t sgsn_tlli; |
| 301 | if (!peer->cfg->patch_ptmsi) { |
| 302 | sgsn_tlli = bss_tlli; |
| 303 | } else if (tlli_info->sgsn_tlli.ptmsi != GSM_RESERVED_TMSI) { |
| 304 | sgsn_tlli = gprs_tmsi2tlli(tlli_info->sgsn_tlli.ptmsi, |
| 305 | TLLI_FOREIGN); |
| 306 | } else { |
| 307 | do { |
| 308 | /* create random TLLI, 0b01111xxx... */ |
| 309 | sgsn_tlli = rand_r(&peer->cfg->sgsn_tlli_state); |
| 310 | sgsn_tlli = (sgsn_tlli & 0x7fffffff) | 0x78000000; |
| 311 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame^] | 312 | if (gbproxy_find_tlli_by_sgsn_tlli(peer, sgsn_tlli)) |
Jacob Erlbeck | 0d37671 | 2014-08-11 19:12:24 +0200 | [diff] [blame] | 313 | sgsn_tlli = 0; |
| 314 | } while (!sgsn_tlli); |
| 315 | } |
| 316 | return sgsn_tlli; |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 317 | } |
| 318 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 319 | /* patch BSSGP message */ |
| 320 | static void gbprox_process_bssgp_ul(struct gbproxy_config *cfg, |
| 321 | struct msgb *msg, |
| 322 | struct gbproxy_peer *peer) |
Jacob Erlbeck | c812882 | 2014-08-07 16:07:24 +0200 | [diff] [blame] | 323 | { |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame^] | 324 | struct gprs_gb_parse_context parse_ctx = {0}; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 325 | int rc; |
Jacob Erlbeck | c812882 | 2014-08-07 16:07:24 +0200 | [diff] [blame] | 326 | int len_change = 0; |
Jacob Erlbeck | 7b821d0 | 2014-08-08 08:37:37 +0200 | [diff] [blame] | 327 | time_t now; |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 328 | struct gbproxy_tlli_info *tlli_info = NULL; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 329 | |
| 330 | if (!cfg->core_mcc && !cfg->core_mnc && !cfg->core_apn) |
| 331 | return; |
| 332 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 333 | parse_ctx.to_bss = 0; |
| 334 | |
| 335 | /* Parse BSSGP/LLC */ |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame^] | 336 | rc = gprs_gb_parse_bssgp(msgb_bssgph(msg), msgb_bssgp_len(msg), |
| 337 | &parse_ctx); |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 338 | |
| 339 | if (!rc) { |
| 340 | if (!parse_ctx.need_decryption) { |
| 341 | LOGP(DGPRS, LOGL_ERROR, |
Jacob Erlbeck | 643d522 | 2014-08-18 17:26:04 +0200 | [diff] [blame] | 342 | "NSEI=%u(BSS) patching: " |
| 343 | "failed to parse BSSGP/GMM message\n", |
| 344 | msgb_nsei(msg)); |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 345 | return; |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | /* Get peer */ |
| 350 | if (!peer && msgb_bvci(msg) >= 2) |
| 351 | peer = peer_by_bvci(cfg, msgb_bvci(msg)); |
| 352 | |
| 353 | if (!peer) |
| 354 | peer = gbprox_peer_by_nsei(cfg, msgb_nsei(msg)); |
| 355 | |
| 356 | if (!peer) |
| 357 | peer = peer_by_bssgp_tlv(cfg, &parse_ctx.bssgp_tp); |
| 358 | |
| 359 | if (!peer) { |
| 360 | LOGP(DLLC, LOGL_INFO, |
| 361 | "NSEI=%d(BSS) patching: didn't find peer for message, " |
| 362 | "PDU %d\n", |
| 363 | msgb_nsei(msg), parse_ctx.pdu_type); |
| 364 | /* Increment counter */ |
| 365 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_PATCH_PEER_ERR]); |
| 366 | return; |
| 367 | } |
| 368 | |
| 369 | now = time(NULL); |
| 370 | |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 371 | if (parse_ctx.bssgp_raid_enc && parse_ctx.old_raid_enc && |
| 372 | memcmp(parse_ctx.bssgp_raid_enc, parse_ctx.old_raid_enc, 6) == 0) |
| 373 | parse_ctx.old_raid_matches = 1; |
| 374 | |
| 375 | gbprox_update_current_raid(parse_ctx.bssgp_raid_enc, peer, |
| 376 | parse_ctx.llc_msg_name); |
| 377 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame^] | 378 | if (parse_ctx.g48_hdr) { |
| 379 | switch (parse_ctx.g48_hdr->msg_type) { |
| 380 | case GSM48_MT_GMM_ATTACH_REQ: |
| 381 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_ATTACH_REQS]); |
| 382 | break; |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 383 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame^] | 384 | default: |
| 385 | break; |
| 386 | } |
| 387 | } |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 388 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame^] | 389 | gprs_gb_log_parse_context(&parse_ctx, "BSSGP"); |
| 390 | |
| 391 | tlli_info = gbproxy_update_tlli_state_ul(peer, now, &parse_ctx); |
| 392 | |
| 393 | gbproxy_patch_bssgp(msg, msgb_bssgph(msg), msgb_bssgp_len(msg), |
| 394 | peer, tlli_info, &len_change, &parse_ctx); |
| 395 | |
| 396 | gbproxy_update_tlli_state_after(peer, tlli_info, now, &parse_ctx); |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 397 | |
| 398 | return; |
| 399 | } |
| 400 | |
| 401 | /* patch BSSGP message to use core_mcc/mnc on the SGSN side */ |
| 402 | static void gbprox_process_bssgp_dl(struct gbproxy_config *cfg, |
| 403 | struct msgb *msg, |
| 404 | struct gbproxy_peer *peer) |
| 405 | { |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame^] | 406 | struct gprs_gb_parse_context parse_ctx = {0}; |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 407 | int rc; |
| 408 | int len_change = 0; |
| 409 | time_t now; |
| 410 | struct gbproxy_tlli_info *tlli_info = NULL; |
| 411 | |
| 412 | parse_ctx.to_bss = 1; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 413 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame^] | 414 | rc = gprs_gb_parse_bssgp(msgb_bssgph(msg), msgb_bssgp_len(msg), |
| 415 | &parse_ctx); |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 416 | |
| 417 | if (!rc) { |
| 418 | if (!parse_ctx.need_decryption) { |
| 419 | LOGP(DGPRS, LOGL_ERROR, |
Jacob Erlbeck | 643d522 | 2014-08-18 17:26:04 +0200 | [diff] [blame] | 420 | "NSEI=%u(SGSN) patching: " |
| 421 | "failed to parse BSSGP/GMM message\n", |
| 422 | msgb_nsei(msg)); |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 423 | return; |
| 424 | } |
| 425 | } |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 426 | |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 427 | if (!peer && msgb_bvci(msg) >= 2) |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 428 | peer = peer_by_bvci(cfg, msgb_bvci(msg)); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 429 | |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 430 | if (!peer) |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 431 | peer = peer_by_bssgp_tlv(cfg, &parse_ctx.bssgp_tp); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 432 | |
| 433 | if (!peer) { |
| 434 | LOGP(DLLC, LOGL_INFO, |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 435 | "NSEI=%d(SGSN) patching: didn't find peer for message, " |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 436 | "PDU %d\n", |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 437 | msgb_nsei(msg), parse_ctx.pdu_type); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 438 | /* Increment counter */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 439 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_PATCH_PEER_ERR]); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 440 | return; |
| 441 | } |
| 442 | |
Jacob Erlbeck | 7b821d0 | 2014-08-08 08:37:37 +0200 | [diff] [blame] | 443 | now = time(NULL); |
| 444 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame^] | 445 | if (parse_ctx.g48_hdr) { |
| 446 | switch (parse_ctx.g48_hdr->msg_type) { |
| 447 | case GSM48_MT_GMM_ATTACH_REJ: |
| 448 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_ATTACH_REJS]); |
| 449 | break; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 450 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame^] | 451 | default: |
| 452 | break; |
| 453 | } |
| 454 | } |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 455 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame^] | 456 | gprs_gb_log_parse_context(&parse_ctx, "BSSGP"); |
| 457 | |
| 458 | tlli_info = gbproxy_update_tlli_state_dl(peer, now, &parse_ctx); |
| 459 | |
| 460 | gbproxy_patch_bssgp(msg, msgb_bssgph(msg), msgb_bssgp_len(msg), |
| 461 | peer, tlli_info, &len_change, &parse_ctx); |
| 462 | |
| 463 | gbproxy_update_tlli_state_after(peer, tlli_info, now, &parse_ctx); |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 464 | |
Jacob Erlbeck | 03551e5 | 2014-06-27 19:56:05 +0200 | [diff] [blame] | 465 | return; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 466 | } |
| 467 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 468 | /* feed a message down the NS-VC associated with the specified peer */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 469 | static int gbprox_relay2sgsn(struct gbproxy_config *cfg, struct msgb *old_msg, |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 470 | struct gbproxy_peer *peer, uint16_t ns_bvci) |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 471 | { |
Harald Welte | 39d0bb5 | 2010-05-12 18:10:25 +0000 | [diff] [blame] | 472 | /* create a copy of the message so the old one can |
| 473 | * be free()d safely when we return from gbprox_rcvmsg() */ |
Holger Hans Peter Freyther | 7127b02 | 2014-08-04 11:52:52 +0200 | [diff] [blame] | 474 | struct msgb *msg = gprs_msgb_copy(old_msg, "msgb_relay2sgsn"); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 475 | int rc; |
Harald Welte | 39d0bb5 | 2010-05-12 18:10:25 +0000 | [diff] [blame] | 476 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 477 | gbprox_process_bssgp_ul(cfg, msg, peer); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 478 | |
Harald Welte | e9ea269 | 2010-05-11 20:20:13 +0200 | [diff] [blame] | 479 | DEBUGP(DGPRS, "NSEI=%u proxying BTS->SGSN (NS_BVCI=%u, NSEI=%u)\n", |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 480 | msgb_nsei(msg), ns_bvci, cfg->nsip_sgsn_nsei); |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 481 | |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 482 | msgb_bvci(msg) = ns_bvci; |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 483 | msgb_nsei(msg) = cfg->nsip_sgsn_nsei; |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 484 | |
Harald Welte | 69619e3 | 2010-05-03 19:05:10 +0200 | [diff] [blame] | 485 | strip_ns_hdr(msg); |
| 486 | |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 487 | rc = gprs_ns_sendmsg(bssgp_nsi, msg); |
| 488 | if (rc < 0) |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 489 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_TX_ERR_SGSN]); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 490 | |
| 491 | return rc; |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 492 | } |
| 493 | |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 494 | /* feed a message down the NS-VC associated with the specified peer */ |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 495 | static int gbprox_relay2peer(struct msgb *old_msg, struct gbproxy_peer *peer, |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 496 | uint16_t ns_bvci) |
| 497 | { |
Harald Welte | 39d0bb5 | 2010-05-12 18:10:25 +0000 | [diff] [blame] | 498 | /* create a copy of the message so the old one can |
| 499 | * be free()d safely when we return from gbprox_rcvmsg() */ |
Holger Hans Peter Freyther | 7127b02 | 2014-08-04 11:52:52 +0200 | [diff] [blame] | 500 | struct msgb *msg = gprs_msgb_copy(old_msg, "msgb_relay2peer"); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 501 | int rc; |
Harald Welte | 39d0bb5 | 2010-05-12 18:10:25 +0000 | [diff] [blame] | 502 | |
Harald Welte | 0ab535b | 2010-05-13 10:34:56 +0200 | [diff] [blame] | 503 | DEBUGP(DGPRS, "NSEI=%u proxying SGSN->BSS (NS_BVCI=%u, NSEI=%u)\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 504 | msgb_nsei(msg), ns_bvci, peer->nsei); |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 505 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 506 | msgb_bvci(msg) = ns_bvci; |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 507 | msgb_nsei(msg) = peer->nsei; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 508 | |
Harald Welte | 0ab535b | 2010-05-13 10:34:56 +0200 | [diff] [blame] | 509 | /* Strip the old NS header, it will be replaced with a new one */ |
Harald Welte | 69619e3 | 2010-05-03 19:05:10 +0200 | [diff] [blame] | 510 | strip_ns_hdr(msg); |
| 511 | |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 512 | rc = gprs_ns_sendmsg(bssgp_nsi, msg); |
| 513 | if (rc < 0) |
| 514 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_TX_ERR]); |
| 515 | |
| 516 | return rc; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 517 | } |
| 518 | |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 519 | static int block_unblock_peer(struct gbproxy_config *cfg, uint16_t ptp_bvci, uint8_t pdu_type) |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 520 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 521 | struct gbproxy_peer *peer; |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 522 | |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 523 | peer = peer_by_bvci(cfg, ptp_bvci); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 524 | if (!peer) { |
| 525 | LOGP(DGPRS, LOGL_ERROR, "BVCI=%u: Cannot find BSS\n", |
| 526 | ptp_bvci); |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 527 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 528 | return -ENOENT; |
| 529 | } |
| 530 | |
| 531 | switch (pdu_type) { |
| 532 | case BSSGP_PDUT_BVC_BLOCK_ACK: |
| 533 | peer->blocked = 1; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 534 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_BLOCKED]); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 535 | break; |
| 536 | case BSSGP_PDUT_BVC_UNBLOCK_ACK: |
| 537 | peer->blocked = 0; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 538 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_UNBLOCKED]); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 539 | break; |
| 540 | default: |
| 541 | break; |
| 542 | } |
| 543 | return 0; |
| 544 | } |
| 545 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 546 | /* Send a message to a peer identified by ptp_bvci but using ns_bvci |
| 547 | * in the NS hdr */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 548 | static int gbprox_relay2bvci(struct gbproxy_config *cfg, struct msgb *msg, uint16_t ptp_bvci, |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 549 | uint16_t ns_bvci) |
| 550 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 551 | struct gbproxy_peer *peer; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 552 | |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 553 | peer = peer_by_bvci(cfg, ptp_bvci); |
Harald Welte | 1c77c6e | 2010-05-03 21:37:11 +0200 | [diff] [blame] | 554 | if (!peer) { |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 555 | LOGP(DGPRS, LOGL_ERROR, "BVCI=%u: Cannot find BSS\n", |
Harald Welte | 1c77c6e | 2010-05-03 21:37:11 +0200 | [diff] [blame] | 556 | ptp_bvci); |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 557 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 558 | return -ENOENT; |
Harald Welte | 1c77c6e | 2010-05-03 21:37:11 +0200 | [diff] [blame] | 559 | } |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 560 | |
Harald Welte | 69619e3 | 2010-05-03 19:05:10 +0200 | [diff] [blame] | 561 | return gbprox_relay2peer(msg, peer, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 562 | } |
| 563 | |
Harald Welte | b1fd902 | 2012-06-17 12:16:31 +0800 | [diff] [blame] | 564 | int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) |
| 565 | { |
| 566 | return 0; |
| 567 | } |
| 568 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 569 | /* Receive an incoming signalling message from a BSS-side NS-VC */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 570 | static int gbprox_rx_sig_from_bss(struct gbproxy_config *cfg, |
| 571 | struct msgb *msg, uint16_t nsei, |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 572 | uint16_t ns_bvci) |
| 573 | { |
Harald Welte | ca3620a | 2010-05-03 16:30:59 +0200 | [diff] [blame] | 574 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 575 | struct tlv_parsed tp; |
| 576 | uint8_t pdu_type = bgph->pdu_type; |
Harald Welte | ca3620a | 2010-05-03 16:30:59 +0200 | [diff] [blame] | 577 | int data_len = msgb_bssgp_len(msg) - sizeof(*bgph); |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 578 | struct gbproxy_peer *from_peer = NULL; |
Harald Welte | 70f38d2 | 2010-05-01 12:10:57 +0200 | [diff] [blame] | 579 | struct gprs_ra_id raid; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 580 | |
Harald Welte | c471d3d | 2011-02-06 17:13:12 +0100 | [diff] [blame] | 581 | if (ns_bvci != 0 && ns_bvci != 1) { |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 582 | LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u BVCI=%u is not signalling\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 583 | nsei, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 584 | return -EINVAL; |
| 585 | } |
| 586 | |
| 587 | /* we actually should never see those two for BVCI == 0, but double-check |
| 588 | * just to make sure */ |
| 589 | if (pdu_type == BSSGP_PDUT_UL_UNITDATA || |
| 590 | pdu_type == BSSGP_PDUT_DL_UNITDATA) { |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 591 | LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u UNITDATA not allowed in " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 592 | "signalling\n", nsei); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 593 | return -EINVAL; |
| 594 | } |
| 595 | |
| 596 | bssgp_tlv_parse(&tp, bgph->data, data_len); |
| 597 | |
| 598 | switch (pdu_type) { |
| 599 | case BSSGP_PDUT_SUSPEND: |
| 600 | case BSSGP_PDUT_RESUME: |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 601 | /* We implement RAI snooping during SUSPEND/RESUME, since it |
| 602 | * establishes a relationsip between BVCI/peer and the routeing |
| 603 | * area identification. The snooped information is then used |
| 604 | * for routing the {SUSPEND,RESUME}_[N]ACK back to the correct |
| 605 | * BSSGP */ |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 606 | if (!TLVP_PRESENT(&tp, BSSGP_IE_ROUTEING_AREA)) |
| 607 | goto err_mand_ie; |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 608 | from_peer = gbprox_peer_by_nsei(cfg, nsei); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 609 | if (!from_peer) |
| 610 | goto err_no_peer; |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 611 | memcpy(from_peer->ra, TLVP_VAL(&tp, BSSGP_IE_ROUTEING_AREA), |
| 612 | sizeof(from_peer->ra)); |
Harald Welte | 7fc9822 | 2010-05-11 10:15:42 +0200 | [diff] [blame] | 613 | gsm48_parse_ra(&raid, from_peer->ra); |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 614 | LOGP(DGPRS, LOGL_INFO, "NSEI=%u BSSGP SUSPEND/RESUME " |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 615 | "RAI snooping: RAI %u-%u-%u-%u behind BVCI=%u\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 616 | nsei, raid.mcc, raid.mnc, raid.lac, |
| 617 | raid.rac , from_peer->bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 618 | /* FIXME: This only supports one BSS per RA */ |
| 619 | break; |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 620 | case BSSGP_PDUT_BVC_RESET: |
| 621 | /* If we receive a BVC reset on the signalling endpoint, we |
| 622 | * don't want the SGSN to reset, as the signalling endpoint |
| 623 | * is common for all point-to-point BVCs (and thus all BTS) */ |
| 624 | if (TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) { |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 625 | uint16_t bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
Harald Welte | 72953b8 | 2010-05-12 00:20:41 +0200 | [diff] [blame] | 626 | LOGP(DGPRS, LOGL_INFO, "NSEI=%u Rx BVC RESET (BVCI=%u)\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 627 | nsei, bvci); |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 628 | if (bvci == 0) { |
| 629 | /* FIXME: only do this if SGSN is alive! */ |
Harald Welte | e9ea269 | 2010-05-11 20:20:13 +0200 | [diff] [blame] | 630 | LOGP(DGPRS, LOGL_INFO, "NSEI=%u Tx fake " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 631 | "BVC RESET ACK of BVCI=0\n", nsei); |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 632 | return bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_RESET_ACK, |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 633 | nsei, 0, ns_bvci); |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 634 | } |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 635 | from_peer = peer_by_bvci(cfg, bvci); |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 636 | if (!from_peer) { |
Harald Welte | 1c77c6e | 2010-05-03 21:37:11 +0200 | [diff] [blame] | 637 | /* if a PTP-BVC is reset, and we don't know that |
| 638 | * PTP-BVCI yet, we should allocate a new peer */ |
| 639 | LOGP(DGPRS, LOGL_INFO, "Allocationg new peer for " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 640 | "BVCI=%u via NSEI=%u\n", bvci, nsei); |
Holger Hans Peter Freyther | 0196c99 | 2014-08-04 17:10:08 +0200 | [diff] [blame] | 641 | from_peer = gbproxy_peer_alloc(cfg, bvci); |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 642 | from_peer->nsei = nsei; |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 643 | } |
Jacob Erlbeck | 64cb924 | 2013-10-24 12:48:56 +0200 | [diff] [blame] | 644 | |
| 645 | if (!check_peer_nsei(from_peer, nsei)) |
| 646 | from_peer->nsei = nsei; |
| 647 | |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 648 | if (TLVP_PRESENT(&tp, BSSGP_IE_CELL_ID)) { |
| 649 | struct gprs_ra_id raid; |
| 650 | /* We have a Cell Identifier present in this |
| 651 | * PDU, this means we can extend our local |
| 652 | * state information about this particular cell |
| 653 | * */ |
| 654 | memcpy(from_peer->ra, |
| 655 | TLVP_VAL(&tp, BSSGP_IE_CELL_ID), |
| 656 | sizeof(from_peer->ra)); |
| 657 | gsm48_parse_ra(&raid, from_peer->ra); |
| 658 | LOGP(DGPRS, LOGL_INFO, "NSEI=%u/BVCI=%u " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 659 | "Cell ID %u-%u-%u-%u\n", nsei, |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 660 | bvci, raid.mcc, raid.mnc, raid.lac, |
| 661 | raid.rac); |
| 662 | } |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 663 | } |
| 664 | break; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 665 | } |
| 666 | |
Harald Welte | e9ea269 | 2010-05-11 20:20:13 +0200 | [diff] [blame] | 667 | /* Normally, we can simply pass on all signalling messages from BSS to |
| 668 | * SGSN */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 669 | return gbprox_relay2sgsn(cfg, msg, from_peer, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 670 | err_no_peer: |
Jacob Erlbeck | c5085f9 | 2013-10-18 13:04:48 +0200 | [diff] [blame] | 671 | LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(BSS) cannot find peer based on NSEI\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 672 | nsei); |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 673 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_NSEI]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 674 | return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 675 | err_mand_ie: |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 676 | LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(BSS) missing mandatory RA IE\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 677 | nsei); |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 678 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_PROTO_ERR_BSS]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 679 | return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 680 | } |
| 681 | |
| 682 | /* Receive paging request from SGSN, we need to relay to proper BSS */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 683 | static int gbprox_rx_paging(struct gbproxy_config *cfg, struct msgb *msg, struct tlv_parsed *tp, |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 684 | uint32_t nsei, uint16_t ns_bvci) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 685 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 686 | struct gbproxy_peer *peer = NULL; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 687 | int errctr = GBPROX_GLOB_CTR_PROTO_ERR_SGSN; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 688 | |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 689 | LOGP(DGPRS, LOGL_INFO, "NSEI=%u(SGSN) BSSGP PAGING ", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 690 | nsei); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 691 | if (TLVP_PRESENT(tp, BSSGP_IE_BVCI)) { |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 692 | uint16_t bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 693 | LOGPC(DGPRS, LOGL_INFO, "routing by BVCI to peer BVCI=%u\n", |
| 694 | bvci); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 695 | errctr = GBPROX_GLOB_CTR_OTHER_ERR; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 696 | } else if (TLVP_PRESENT(tp, BSSGP_IE_ROUTEING_AREA)) { |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 697 | peer = peer_by_rai(cfg, TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA)); |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 698 | LOGPC(DGPRS, LOGL_INFO, "routing by RAI to peer BVCI=%u\n", |
Holger Hans Peter Freyther | 62eaf54 | 2010-06-08 16:30:24 +0800 | [diff] [blame] | 699 | peer ? peer->bvci : -1); |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 700 | errctr = GBPROX_GLOB_CTR_INV_RAI; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 701 | } else if (TLVP_PRESENT(tp, BSSGP_IE_LOCATION_AREA)) { |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 702 | peer = peer_by_lai(cfg, TLVP_VAL(tp, BSSGP_IE_LOCATION_AREA)); |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 703 | LOGPC(DGPRS, LOGL_INFO, "routing by LAI to peer BVCI=%u\n", |
Holger Hans Peter Freyther | 62eaf54 | 2010-06-08 16:30:24 +0800 | [diff] [blame] | 704 | peer ? peer->bvci : -1); |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 705 | errctr = GBPROX_GLOB_CTR_INV_LAI; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 706 | } else |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 707 | LOGPC(DGPRS, LOGL_INFO, "\n"); |
| 708 | |
| 709 | if (!peer) { |
| 710 | LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) BSSGP PAGING: " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 711 | "unable to route, missing IE\n", nsei); |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 712 | rate_ctr_inc(&cfg->ctrg->ctr[errctr]); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 713 | return -EINVAL; |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 714 | } |
| 715 | return gbprox_relay2peer(msg, peer, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 716 | } |
| 717 | |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 718 | /* Receive an incoming BVC-RESET message from the SGSN */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 719 | static int rx_reset_from_sgsn(struct gbproxy_config *cfg, |
| 720 | struct msgb *msg, struct tlv_parsed *tp, |
| 721 | uint32_t nsei, uint16_t ns_bvci) |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 722 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 723 | struct gbproxy_peer *peer; |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 724 | uint16_t ptp_bvci; |
| 725 | |
| 726 | if (!TLVP_PRESENT(tp, BSSGP_IE_BVCI)) { |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 727 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 728 | ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 729 | return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, |
| 730 | NULL, msg); |
| 731 | } |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 732 | ptp_bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 733 | |
| 734 | if (ptp_bvci >= 2) { |
| 735 | /* A reset for a PTP BVC was received, forward it to its |
| 736 | * respective peer */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 737 | peer = peer_by_bvci(cfg, ptp_bvci); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 738 | if (!peer) { |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 739 | LOGP(DGPRS, LOGL_ERROR, "NSEI=%u BVCI=%u: Cannot find BSS\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 740 | nsei, ptp_bvci); |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 741 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 742 | ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 743 | return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, |
| 744 | NULL, msg); |
| 745 | } |
| 746 | return gbprox_relay2peer(msg, peer, ns_bvci); |
| 747 | } |
| 748 | |
| 749 | /* A reset for the Signalling entity has been received |
| 750 | * from the SGSN. As the signalling BVCI is shared |
| 751 | * among all the BSS's that we multiplex, it needs to |
| 752 | * be relayed */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 753 | llist_for_each_entry(peer, &cfg->bts_peers, list) |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 754 | gbprox_relay2peer(msg, peer, ns_bvci); |
| 755 | |
| 756 | return 0; |
| 757 | } |
| 758 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 759 | /* Receive an incoming signalling message from the SGSN-side NS-VC */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 760 | static int gbprox_rx_sig_from_sgsn(struct gbproxy_config *cfg, |
| 761 | struct msgb *msg, uint32_t nsei, |
| 762 | uint16_t ns_bvci) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 763 | { |
Harald Welte | ca3620a | 2010-05-03 16:30:59 +0200 | [diff] [blame] | 764 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 765 | struct tlv_parsed tp; |
| 766 | uint8_t pdu_type = bgph->pdu_type; |
Harald Welte | ca3620a | 2010-05-03 16:30:59 +0200 | [diff] [blame] | 767 | int data_len = msgb_bssgp_len(msg) - sizeof(*bgph); |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 768 | struct gbproxy_peer *peer; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 769 | uint16_t bvci; |
| 770 | int rc = 0; |
| 771 | |
Harald Welte | c471d3d | 2011-02-06 17:13:12 +0100 | [diff] [blame] | 772 | if (ns_bvci != 0 && ns_bvci != 1) { |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 773 | LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) BVCI=%u is not " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 774 | "signalling\n", nsei, ns_bvci); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 775 | /* FIXME: Send proper error message */ |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 776 | return -EINVAL; |
| 777 | } |
| 778 | |
| 779 | /* we actually should never see those two for BVCI == 0, but double-check |
| 780 | * just to make sure */ |
| 781 | if (pdu_type == BSSGP_PDUT_UL_UNITDATA || |
| 782 | pdu_type == BSSGP_PDUT_DL_UNITDATA) { |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 783 | LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) UNITDATA not allowed in " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 784 | "signalling\n", nsei); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 785 | return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 786 | } |
| 787 | |
| 788 | rc = bssgp_tlv_parse(&tp, bgph->data, data_len); |
| 789 | |
| 790 | switch (pdu_type) { |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 791 | case BSSGP_PDUT_BVC_RESET: |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 792 | rc = rx_reset_from_sgsn(cfg, msg, &tp, nsei, ns_bvci); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 793 | break; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 794 | case BSSGP_PDUT_FLUSH_LL: |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 795 | case BSSGP_PDUT_BVC_RESET_ACK: |
| 796 | /* simple case: BVCI IE is mandatory */ |
| 797 | if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) |
| 798 | goto err_mand_ie; |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 799 | bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 800 | rc = gbprox_relay2bvci(cfg, msg, bvci, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 801 | break; |
| 802 | case BSSGP_PDUT_PAGING_PS: |
| 803 | case BSSGP_PDUT_PAGING_CS: |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 804 | /* process the paging request (LAI/RAI lookup) */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 805 | rc = gbprox_rx_paging(cfg, msg, &tp, nsei, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 806 | break; |
| 807 | case BSSGP_PDUT_STATUS: |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 808 | /* Some exception has occurred */ |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 809 | LOGP(DGPRS, LOGL_NOTICE, |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 810 | "NSEI=%u(SGSN) BSSGP STATUS ", nsei); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 811 | if (!TLVP_PRESENT(&tp, BSSGP_IE_CAUSE)) { |
| 812 | LOGPC(DGPRS, LOGL_NOTICE, "\n"); |
| 813 | goto err_mand_ie; |
| 814 | } |
| 815 | LOGPC(DGPRS, LOGL_NOTICE, |
| 816 | "cause=0x%02x(%s) ", *TLVP_VAL(&tp, BSSGP_IE_CAUSE), |
| 817 | bssgp_cause_str(*TLVP_VAL(&tp, BSSGP_IE_CAUSE))); |
| 818 | if (TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) { |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 819 | uint16_t bvci = tlvp_val16_unal(&tp, BSSGP_IE_BVCI); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 820 | LOGPC(DGPRS, LOGL_NOTICE, |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 821 | "BVCI=%u\n", ntohs(bvci)); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 822 | } else |
| 823 | LOGPC(DGPRS, LOGL_NOTICE, "\n"); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 824 | break; |
| 825 | /* those only exist in the SGSN -> BSS direction */ |
| 826 | case BSSGP_PDUT_SUSPEND_ACK: |
| 827 | case BSSGP_PDUT_SUSPEND_NACK: |
| 828 | case BSSGP_PDUT_RESUME_ACK: |
| 829 | case BSSGP_PDUT_RESUME_NACK: |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 830 | /* RAI IE is mandatory */ |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 831 | if (!TLVP_PRESENT(&tp, BSSGP_IE_ROUTEING_AREA)) |
| 832 | goto err_mand_ie; |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 833 | peer = peer_by_rai(cfg, TLVP_VAL(&tp, BSSGP_IE_ROUTEING_AREA)); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 834 | if (!peer) |
| 835 | goto err_no_peer; |
Harald Welte | 69619e3 | 2010-05-03 19:05:10 +0200 | [diff] [blame] | 836 | rc = gbprox_relay2peer(msg, peer, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 837 | break; |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 838 | case BSSGP_PDUT_BVC_BLOCK_ACK: |
| 839 | case BSSGP_PDUT_BVC_UNBLOCK_ACK: |
| 840 | if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) |
| 841 | goto err_mand_ie; |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 842 | bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 843 | if (bvci == 0) { |
| 844 | LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) BSSGP " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 845 | "%sBLOCK_ACK for signalling BVCI ?!?\n", nsei, |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 846 | pdu_type == BSSGP_PDUT_BVC_UNBLOCK_ACK ? "UN":""); |
| 847 | /* should we send STATUS ? */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 848 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 849 | ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 850 | } else { |
| 851 | /* Mark BVC as (un)blocked */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 852 | block_unblock_peer(cfg, bvci, pdu_type); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 853 | } |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 854 | rc = gbprox_relay2bvci(cfg, msg, bvci, ns_bvci); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 855 | break; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 856 | case BSSGP_PDUT_SGSN_INVOKE_TRACE: |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 857 | LOGP(DGPRS, LOGL_ERROR, |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 858 | "NSEI=%u(SGSN) BSSGP INVOKE TRACE not supported\n",nsei); |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 859 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 860 | ctr[GBPROX_GLOB_CTR_NOT_SUPPORTED_SGSN]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 861 | rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 862 | break; |
| 863 | default: |
Harald Welte | 72953b8 | 2010-05-12 00:20:41 +0200 | [diff] [blame] | 864 | LOGP(DGPRS, LOGL_NOTICE, "BSSGP PDU type 0x%02x unknown\n", |
| 865 | pdu_type); |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 866 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 867 | ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 868 | rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 869 | break; |
| 870 | } |
| 871 | |
| 872 | return rc; |
| 873 | err_mand_ie: |
Harald Welte | 1c77c6e | 2010-05-03 21:37:11 +0200 | [diff] [blame] | 874 | LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) missing mandatory IE\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 875 | nsei); |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 876 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 877 | ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 878 | return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 879 | err_no_peer: |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 880 | LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) cannot find peer based on RAI\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 881 | nsei); |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 882 | rate_ctr_inc(&cfg->ctrg-> ctr[GBPROX_GLOB_CTR_INV_RAI]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 883 | return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 884 | } |
| 885 | |
| 886 | /* Main input function for Gb proxy */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 887 | int gbprox_rcvmsg(struct gbproxy_config *cfg, struct msgb *msg, uint16_t nsei, |
| 888 | uint16_t ns_bvci, uint16_t nsvci) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 889 | { |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 890 | int rc; |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 891 | struct gbproxy_peer *peer; |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 892 | int remote_end_is_sgsn = nsei == cfg->nsip_sgsn_nsei; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 893 | |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 894 | if (remote_end_is_sgsn) |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 895 | gbprox_process_bssgp_dl(cfg, msg, NULL); |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 896 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 897 | /* Only BVCI=0 messages need special treatment */ |
| 898 | if (ns_bvci == 0 || ns_bvci == 1) { |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 899 | if (remote_end_is_sgsn) |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 900 | rc = gbprox_rx_sig_from_sgsn(cfg, msg, nsei, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 901 | else |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 902 | rc = gbprox_rx_sig_from_bss(cfg, msg, nsei, ns_bvci); |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 903 | } else { |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 904 | peer = peer_by_bvci(cfg, ns_bvci); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 905 | |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 906 | /* All other BVCI are PTP and thus can be simply forwarded */ |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 907 | if (!remote_end_is_sgsn) { |
| 908 | if (peer) |
| 909 | check_peer_nsei(peer, nsei); |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 910 | return gbprox_relay2sgsn(cfg, msg, peer, ns_bvci); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 911 | } |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 912 | |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 913 | /* else: SGSN -> BSS direction */ |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 914 | if (!peer) { |
Jacob Erlbeck | f0f63a4 | 2013-10-18 22:12:17 +0200 | [diff] [blame] | 915 | LOGP(DGPRS, LOGL_INFO, "Didn't find peer for " |
| 916 | "BVCI=%u for message from NSVC=%u/NSEI=%u (SGSN)\n", |
| 917 | ns_bvci, nsvci, nsei); |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 918 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | f0f63a4 | 2013-10-18 22:12:17 +0200 | [diff] [blame] | 919 | ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
| 920 | return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, |
| 921 | &ns_bvci, msg); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 922 | } |
| 923 | if (peer->blocked) { |
| 924 | LOGP(DGPRS, LOGL_NOTICE, "Dropping PDU for " |
| 925 | "blocked BVCI=%u via NSVC=%u/NSEI=%u\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 926 | ns_bvci, nsvci, nsei); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 927 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_DROPPED]); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 928 | return bssgp_tx_status(BSSGP_CAUSE_BVCI_BLOCKED, NULL, msg); |
| 929 | } |
| 930 | rc = gbprox_relay2peer(msg, peer, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 931 | } |
| 932 | |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 933 | return rc; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 934 | } |
Harald Welte | 85801d0 | 2010-05-11 05:49:43 +0200 | [diff] [blame] | 935 | |
Harald Welte | 1ccbf44 | 2010-05-14 11:53:08 +0000 | [diff] [blame] | 936 | int gbprox_reset_persistent_nsvcs(struct gprs_ns_inst *nsi) |
| 937 | { |
| 938 | struct gprs_nsvc *nsvc; |
| 939 | |
| 940 | llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) { |
| 941 | if (!nsvc->persistent) |
| 942 | continue; |
| 943 | gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION); |
| 944 | } |
| 945 | return 0; |
| 946 | } |
| 947 | |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 948 | /* Signal handler for signals from NS layer */ |
| 949 | int gbprox_signal(unsigned int subsys, unsigned int signal, |
| 950 | void *handler_data, void *signal_data) |
| 951 | { |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 952 | struct gbproxy_config *cfg = handler_data; |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 953 | struct ns_signal_data *nssd = signal_data; |
| 954 | struct gprs_nsvc *nsvc = nssd->nsvc; |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 955 | struct gbproxy_peer *peer; |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 956 | |
Harald Welte | a6a20b4 | 2012-06-16 16:40:42 +0800 | [diff] [blame] | 957 | if (subsys != SS_L_NS) |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 958 | return 0; |
| 959 | |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 960 | if (signal == S_NS_RESET && nsvc->nsei == cfg->nsip_sgsn_nsei) { |
Harald Welte | f69c059 | 2010-05-11 18:29:44 +0200 | [diff] [blame] | 961 | /* We have received a NS-RESET from the NSEI and NSVC |
| 962 | * of the SGSN. This might happen with SGSN that start |
| 963 | * their own NS-RESET procedure without waiting for our |
| 964 | * NS-RESET */ |
| 965 | nsvc->remote_end_is_sgsn = 1; |
| 966 | } |
| 967 | |
Harald Welte | b778d2c | 2010-05-12 13:28:25 +0000 | [diff] [blame] | 968 | if (signal == S_NS_ALIVE_EXP && nsvc->remote_end_is_sgsn) { |
| 969 | LOGP(DGPRS, LOGL_NOTICE, "Tns alive expired too often, " |
| 970 | "re-starting RESET procedure\n"); |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 971 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 972 | ctr[GBPROX_GLOB_CTR_RESTART_RESET_SGSN]); |
Harald Welte | e6599ee | 2012-06-17 12:25:53 +0800 | [diff] [blame] | 973 | gprs_ns_nsip_connect(nsvc->nsi, &nsvc->ip.bts_addr, |
| 974 | nsvc->nsei, nsvc->nsvci); |
Harald Welte | b778d2c | 2010-05-12 13:28:25 +0000 | [diff] [blame] | 975 | } |
| 976 | |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 977 | if (!nsvc->remote_end_is_sgsn) { |
| 978 | /* from BSS to SGSN */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 979 | peer = gbprox_peer_by_nsei(cfg, nsvc->nsei); |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 980 | if (!peer) { |
| 981 | LOGP(DGPRS, LOGL_NOTICE, "signal %u for unknown peer " |
| 982 | "NSEI=%u/NSVCI=%u\n", signal, nsvc->nsei, |
| 983 | nsvc->nsvci); |
| 984 | return 0; |
| 985 | } |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 986 | switch (signal) { |
| 987 | case S_NS_RESET: |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 988 | case S_NS_BLOCK: |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 989 | if (!peer->blocked) |
| 990 | break; |
| 991 | LOGP(DGPRS, LOGL_NOTICE, "Converting NS_RESET from " |
| 992 | "NSEI=%u/NSVCI=%u into BSSGP_BVC_BLOCK to SGSN\n", |
| 993 | nsvc->nsei, nsvc->nsvci); |
| 994 | bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_BLOCK, nsvc->nsei, |
| 995 | peer->bvci, 0); |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 996 | break; |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 997 | } |
| 998 | } else { |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 999 | /* Forward this message to all NS-VC to BSS */ |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1000 | struct gprs_ns_inst *nsi = cfg->nsi; |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 1001 | struct gprs_nsvc *next_nsvc; |
| 1002 | |
| 1003 | llist_for_each_entry(next_nsvc, &nsi->gprs_nsvcs, list) { |
| 1004 | if (next_nsvc->remote_end_is_sgsn) |
| 1005 | continue; |
| 1006 | |
| 1007 | /* Note that the following does not start the full |
| 1008 | * procedures including timer based retransmissions. */ |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 1009 | switch (signal) { |
| 1010 | case S_NS_RESET: |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 1011 | gprs_ns_tx_reset(next_nsvc, nssd->cause); |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 1012 | break; |
| 1013 | case S_NS_BLOCK: |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 1014 | gprs_ns_tx_block(next_nsvc, nssd->cause); |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 1015 | break; |
| 1016 | case S_NS_UNBLOCK: |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 1017 | gprs_ns_tx_unblock(next_nsvc); |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 1018 | break; |
| 1019 | } |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 1020 | } |
| 1021 | } |
| 1022 | return 0; |
| 1023 | } |
| 1024 | |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1025 | void gbprox_reset(struct gbproxy_config *cfg) |
Jacob Erlbeck | 72b401f | 2013-10-24 12:48:55 +0200 | [diff] [blame] | 1026 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 1027 | struct gbproxy_peer *peer, *tmp; |
Jacob Erlbeck | 72b401f | 2013-10-24 12:48:55 +0200 | [diff] [blame] | 1028 | |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1029 | llist_for_each_entry_safe(peer, tmp, &cfg->bts_peers, list) |
Holger Hans Peter Freyther | 0196c99 | 2014-08-04 17:10:08 +0200 | [diff] [blame] | 1030 | gbproxy_peer_free(peer); |
Jacob Erlbeck | 72b401f | 2013-10-24 12:48:55 +0200 | [diff] [blame] | 1031 | |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1032 | rate_ctr_group_free(cfg->ctrg); |
| 1033 | gbproxy_init_config(cfg); |
Jacob Erlbeck | 72b401f | 2013-10-24 12:48:55 +0200 | [diff] [blame] | 1034 | } |
| 1035 | |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1036 | int gbprox_cleanup_peers(struct gbproxy_config *cfg, uint16_t nsei, uint16_t bvci) |
Jacob Erlbeck | 4211d79 | 2013-10-24 12:48:23 +0200 | [diff] [blame] | 1037 | { |
| 1038 | int counter = 0; |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 1039 | struct gbproxy_peer *peer, *tmp; |
Jacob Erlbeck | 4211d79 | 2013-10-24 12:48:23 +0200 | [diff] [blame] | 1040 | |
Holger Hans Peter Freyther | eece6277 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1041 | llist_for_each_entry_safe(peer, tmp, &cfg->bts_peers, list) { |
Jacob Erlbeck | 4211d79 | 2013-10-24 12:48:23 +0200 | [diff] [blame] | 1042 | if (peer->nsei != nsei) |
| 1043 | continue; |
| 1044 | if (bvci && peer->bvci != bvci) |
| 1045 | continue; |
| 1046 | |
Holger Hans Peter Freyther | 0196c99 | 2014-08-04 17:10:08 +0200 | [diff] [blame] | 1047 | gbproxy_peer_free(peer); |
Jacob Erlbeck | 4211d79 | 2013-10-24 12:48:23 +0200 | [diff] [blame] | 1048 | counter += 1; |
| 1049 | } |
| 1050 | |
| 1051 | return counter; |
| 1052 | } |
| 1053 | |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 1054 | int gbproxy_init_config(struct gbproxy_config *cfg) |
Jacob Erlbeck | 4211d79 | 2013-10-24 12:48:23 +0200 | [diff] [blame] | 1055 | { |
Jacob Erlbeck | 0d37671 | 2014-08-11 19:12:24 +0200 | [diff] [blame] | 1056 | struct timespec tp; |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 1057 | INIT_LLIST_HEAD(&cfg->bts_peers); |
Holger Hans Peter Freyther | a7027a0 | 2014-08-04 11:19:56 +0200 | [diff] [blame] | 1058 | cfg->ctrg = rate_ctr_group_alloc(tall_bsc_ctx, &global_ctrg_desc, 0); |
Jacob Erlbeck | 0d37671 | 2014-08-11 19:12:24 +0200 | [diff] [blame] | 1059 | clock_gettime(CLOCK_REALTIME, &tp); |
| 1060 | cfg->bss_ptmsi_state = tp.tv_sec + tp.tv_nsec; |
| 1061 | cfg->sgsn_tlli_state = tp.tv_sec - tp.tv_nsec; |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 1062 | return 0; |
Jacob Erlbeck | 4211d79 | 2013-10-24 12:48:23 +0200 | [diff] [blame] | 1063 | } |