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> |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 45 | #include <openbsc/gb_proxy.h> |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 46 | |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 47 | #include <openbsc/gprs_llc.h> |
| 48 | #include <openbsc/gsm_04_08.h> |
| 49 | #include <openbsc/gsm_04_08_gprs.h> |
Holger Hans Peter Freyther | 7127b02 | 2014-08-04 11:52:52 +0200 | [diff] [blame] | 50 | #include <openbsc/gprs_utils.h> |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 51 | |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 52 | enum gbprox_global_ctr { |
| 53 | GBPROX_GLOB_CTR_INV_BVCI, |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 54 | GBPROX_GLOB_CTR_INV_LAI, |
| 55 | GBPROX_GLOB_CTR_INV_RAI, |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 56 | GBPROX_GLOB_CTR_INV_NSEI, |
| 57 | GBPROX_GLOB_CTR_PROTO_ERR_BSS, |
| 58 | GBPROX_GLOB_CTR_PROTO_ERR_SGSN, |
| 59 | GBPROX_GLOB_CTR_NOT_SUPPORTED_BSS, |
| 60 | GBPROX_GLOB_CTR_NOT_SUPPORTED_SGSN, |
| 61 | GBPROX_GLOB_CTR_RESTART_RESET_SGSN, |
| 62 | GBPROX_GLOB_CTR_TX_ERR_SGSN, |
| 63 | GBPROX_GLOB_CTR_OTHER_ERR, |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 64 | GBPROX_GLOB_CTR_PATCH_PEER_ERR, |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 65 | }; |
| 66 | |
| 67 | static const struct rate_ctr_desc global_ctr_description[] = { |
| 68 | { "inv-bvci", "Invalid BVC Identifier " }, |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 69 | { "inv-lai", "Invalid Location Area Identifier" }, |
| 70 | { "inv-rai", "Invalid Routing Area Identifier " }, |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 71 | { "inv-nsei", "No BVC established for NSEI " }, |
| 72 | { "proto-err.bss", "BSSGP protocol error (BSS )" }, |
| 73 | { "proto-err.sgsn", "BSSGP protocol error (SGSN)" }, |
| 74 | { "not-supp.bss", "Feature not supported (BSS )" }, |
| 75 | { "not-supp.sgsn", "Feature not supported (SGSN)" }, |
| 76 | { "restart.sgsn", "Restarted RESET procedure (SGSN)" }, |
| 77 | { "tx-err.sgsn", "NS Transmission error (SGSN)" }, |
| 78 | { "error", "Other error " }, |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 79 | { "mod-peer-err", "Patch error: no peer " }, |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 80 | }; |
| 81 | |
| 82 | static const struct rate_ctr_group_desc global_ctrg_desc = { |
| 83 | .group_name_prefix = "gbproxy.global", |
| 84 | .group_description = "GBProxy Global Statistics", |
| 85 | .num_ctr = ARRAY_SIZE(global_ctr_description), |
| 86 | .ctr_desc = global_ctr_description, |
| 87 | }; |
| 88 | |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 89 | enum gbprox_peer_ctr { |
| 90 | GBPROX_PEER_CTR_BLOCKED, |
| 91 | GBPROX_PEER_CTR_UNBLOCKED, |
| 92 | GBPROX_PEER_CTR_DROPPED, |
| 93 | GBPROX_PEER_CTR_INV_NSEI, |
| 94 | GBPROX_PEER_CTR_TX_ERR, |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 95 | GBPROX_PEER_CTR_RAID_PATCHED_BSS, |
| 96 | GBPROX_PEER_CTR_RAID_PATCHED_SGSN, |
| 97 | GBPROX_PEER_CTR_APN_PATCHED, |
Jacob Erlbeck | 03ca10e | 2014-08-18 17:23:01 +0200 | [diff] [blame] | 98 | GBPROX_PEER_CTR_TLLI_PATCHED_BSS, |
| 99 | GBPROX_PEER_CTR_TLLI_PATCHED_SGSN, |
| 100 | GBPROX_PEER_CTR_PTMSI_PATCHED_BSS, |
| 101 | GBPROX_PEER_CTR_PTMSI_PATCHED_SGSN, |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 102 | GBPROX_PEER_CTR_PATCH_CRYPT_ERR, |
| 103 | GBPROX_PEER_CTR_PATCH_ERR, |
Jacob Erlbeck | 25049b9 | 2014-06-27 10:44:46 +0200 | [diff] [blame] | 104 | GBPROX_PEER_CTR_ATTACH_REQS, |
| 105 | GBPROX_PEER_CTR_ATTACH_REJS, |
Jacob Erlbeck | 03ca10e | 2014-08-18 17:23:01 +0200 | [diff] [blame] | 106 | GBPROX_PEER_CTR_TLLI_UNKNOWN, |
Jacob Erlbeck | 25049b9 | 2014-06-27 10:44:46 +0200 | [diff] [blame] | 107 | GBPROX_PEER_CTR_TLLI_CACHE_SIZE, |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 108 | }; |
| 109 | |
| 110 | static const struct rate_ctr_desc peer_ctr_description[] = { |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 111 | { "blocked", "BVC Block " }, |
| 112 | { "unblocked", "BVC Unblock " }, |
| 113 | { "dropped", "BVC blocked, dropped packet " }, |
| 114 | { "inv-nsei", "NSEI mismatch " }, |
| 115 | { "tx-err", "NS Transmission error " }, |
| 116 | { "raid-mod.bss", "RAID patched (BSS )" }, |
| 117 | { "raid-mod.sgsn", "RAID patched (SGSN)" }, |
| 118 | { "apn-mod.sgsn", "APN patched " }, |
Jacob Erlbeck | 03ca10e | 2014-08-18 17:23:01 +0200 | [diff] [blame] | 119 | { "tlli-mod.bss", "TLLI patched (BSS )" }, |
| 120 | { "tlli-mod.sgsn", "TLLI patched (SGSN)" }, |
| 121 | { "ptmsi-mod.bss", "P-TMSI patched (BSS )" }, |
| 122 | { "ptmsi-mod.sgsn","P-TMSI patched (SGSN)" }, |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 123 | { "mod-crypt-err", "Patch error: encrypted " }, |
| 124 | { "mod-err", "Patch error: other " }, |
Jacob Erlbeck | 25049b9 | 2014-06-27 10:44:46 +0200 | [diff] [blame] | 125 | { "attach-reqs", "Attach Request count " }, |
| 126 | { "attach-rejs", "Attach Reject count " }, |
Jacob Erlbeck | 03ca10e | 2014-08-18 17:23:01 +0200 | [diff] [blame] | 127 | { "tlli-unknown", "TLLI from SGSN unknown " }, |
Jacob Erlbeck | 25049b9 | 2014-06-27 10:44:46 +0200 | [diff] [blame] | 128 | { "tlli-cache", "TLLI cache size " }, |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 129 | }; |
| 130 | |
| 131 | static const struct rate_ctr_group_desc peer_ctrg_desc = { |
| 132 | .group_name_prefix = "gbproxy.peer", |
| 133 | .group_description = "GBProxy Peer Statistics", |
| 134 | .num_ctr = ARRAY_SIZE(peer_ctr_description), |
| 135 | .ctr_desc = peer_ctr_description, |
| 136 | }; |
| 137 | |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 138 | static void gbprox_delete_tllis(struct gbproxy_peer *peer); |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 139 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 140 | /* Find the gbprox_peer by its BVCI */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 141 | 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] | 142 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 143 | struct gbproxy_peer *peer; |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 144 | llist_for_each_entry(peer, &cfg->bts_peers, list) { |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 145 | if (peer->bvci == bvci) |
| 146 | return peer; |
| 147 | } |
| 148 | return NULL; |
| 149 | } |
| 150 | |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 151 | /* Find the gbprox_peer by its NSEI */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 152 | 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] | 153 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 154 | struct gbproxy_peer *peer; |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 155 | llist_for_each_entry(peer, &cfg->bts_peers, list) { |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 156 | if (peer->nsei == nsei) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 157 | return peer; |
| 158 | } |
| 159 | return NULL; |
| 160 | } |
| 161 | |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 162 | /* look-up a peer by its Routeing Area Identification (RAI) */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 163 | 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] | 164 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 165 | struct gbproxy_peer *peer; |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 166 | llist_for_each_entry(peer, &cfg->bts_peers, list) { |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 167 | if (!memcmp(peer->ra, ra, 6)) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 168 | return peer; |
| 169 | } |
| 170 | return NULL; |
| 171 | } |
| 172 | |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 173 | /* look-up a peer by its Location Area Identification (LAI) */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 174 | 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] | 175 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 176 | struct gbproxy_peer *peer; |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 177 | llist_for_each_entry(peer, &cfg->bts_peers, list) { |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 178 | if (!memcmp(peer->ra, la, 5)) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 179 | return peer; |
| 180 | } |
| 181 | return NULL; |
| 182 | } |
| 183 | |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 184 | /* look-up a peer by its Location Area Code (LAC) */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 185 | 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] | 186 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 187 | struct gbproxy_peer *peer; |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 188 | llist_for_each_entry(peer, &cfg->bts_peers, list) { |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 189 | if (!memcmp(peer->ra + 3, la + 3, 2)) |
| 190 | return peer; |
| 191 | } |
| 192 | return NULL; |
| 193 | } |
| 194 | |
| 195 | |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 196 | static int check_peer_nsei(struct gbproxy_peer *peer, uint16_t nsei) |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 197 | { |
| 198 | if (peer->nsei != nsei) { |
| 199 | LOGP(DGPRS, LOGL_NOTICE, "Peer entry doesn't match current NSEI " |
| 200 | "BVCI=%u via NSEI=%u (expected NSEI=%u)\n", |
| 201 | peer->bvci, nsei, peer->nsei); |
| 202 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_INV_NSEI]); |
Jacob Erlbeck | 64cb924 | 2013-10-24 12:48:56 +0200 | [diff] [blame] | 203 | return 0; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 204 | } |
| 205 | |
Jacob Erlbeck | 64cb924 | 2013-10-24 12:48:56 +0200 | [diff] [blame] | 206 | return 1; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 207 | } |
| 208 | |
Holger Hans Peter Freyther | 0196c99 | 2014-08-04 17:10:08 +0200 | [diff] [blame] | 209 | 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] | 210 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 211 | struct gbproxy_peer *peer; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 212 | |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 213 | peer = talloc_zero(tall_bsc_ctx, struct gbproxy_peer); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 214 | if (!peer) |
| 215 | return NULL; |
| 216 | |
| 217 | peer->bvci = bvci; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 218 | peer->ctrg = rate_ctr_group_alloc(peer, &peer_ctrg_desc, bvci); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 219 | peer->cfg = cfg; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 220 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 221 | llist_add(&peer->list, &cfg->bts_peers); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 222 | |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 223 | INIT_LLIST_HEAD(&peer->patch_state.enabled_tllis); |
| 224 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 225 | return peer; |
| 226 | } |
| 227 | |
Holger Hans Peter Freyther | 0196c99 | 2014-08-04 17:10:08 +0200 | [diff] [blame] | 228 | void gbproxy_peer_free(struct gbproxy_peer *peer) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 229 | { |
| 230 | llist_del(&peer->list); |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 231 | |
| 232 | gbprox_delete_tllis(peer); |
| 233 | |
Jacob Erlbeck | aad32bc | 2014-08-07 17:23:00 +0200 | [diff] [blame] | 234 | rate_ctr_group_free(peer->ctrg); |
| 235 | peer->ctrg = NULL; |
| 236 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 237 | talloc_free(peer); |
| 238 | } |
| 239 | |
Harald Welte | 69619e3 | 2010-05-03 19:05:10 +0200 | [diff] [blame] | 240 | /* strip off the NS header */ |
| 241 | static void strip_ns_hdr(struct msgb *msg) |
| 242 | { |
| 243 | int strip_len = msgb_bssgph(msg) - msg->data; |
| 244 | msgb_pull(msg, strip_len); |
| 245 | } |
| 246 | |
Jacob Erlbeck | b138106 | 2014-07-01 12:41:13 +0200 | [diff] [blame] | 247 | /* TODO: Move shift functions to libosmocore */ |
| 248 | |
| 249 | int v_fixed_shift(uint8_t **data, size_t *data_len, |
| 250 | size_t len, uint8_t **value) |
| 251 | { |
| 252 | if (len > *data_len) |
| 253 | goto fail; |
| 254 | |
| 255 | if (value) |
| 256 | *value = *data; |
| 257 | |
| 258 | *data += len; |
| 259 | *data_len -= len; |
| 260 | |
| 261 | return len; |
| 262 | |
| 263 | fail: |
| 264 | *data += *data_len; |
| 265 | *data_len = 0; |
| 266 | return -1; |
| 267 | } |
| 268 | |
| 269 | int tv_fixed_match(uint8_t **data, size_t *data_len, |
| 270 | uint8_t tag, size_t len, |
| 271 | uint8_t **value) |
| 272 | { |
| 273 | size_t ie_len; |
| 274 | |
| 275 | if (*data_len == 0) |
| 276 | goto fail; |
| 277 | |
| 278 | if ((*data)[0] != tag) |
| 279 | return 0; |
| 280 | |
| 281 | if (len > *data_len - 1) |
| 282 | goto fail; |
| 283 | |
| 284 | if (value) |
| 285 | *value = *data + 1; |
| 286 | |
| 287 | ie_len = len + 1; |
| 288 | *data += ie_len; |
| 289 | *data_len -= ie_len; |
| 290 | |
| 291 | return ie_len; |
| 292 | |
| 293 | fail: |
| 294 | *data += *data_len; |
| 295 | *data_len = 0; |
| 296 | return -1; |
| 297 | } |
| 298 | |
| 299 | int tlv_match(uint8_t **data, size_t *data_len, |
| 300 | uint8_t tag, uint8_t **value, size_t *value_len) |
| 301 | { |
| 302 | size_t len; |
| 303 | size_t ie_len; |
| 304 | |
| 305 | if (*data_len < 2) |
| 306 | goto fail; |
| 307 | |
| 308 | if ((*data)[0] != tag) |
| 309 | return 0; |
| 310 | |
| 311 | len = (*data)[1]; |
| 312 | if (len > *data_len - 2) |
| 313 | goto fail; |
| 314 | |
| 315 | if (value) |
| 316 | *value = *data + 2; |
| 317 | if (value_len) |
| 318 | *value_len = len; |
| 319 | |
| 320 | ie_len = len + 2; |
| 321 | |
| 322 | *data += ie_len; |
| 323 | *data_len -= ie_len; |
| 324 | |
| 325 | return ie_len; |
| 326 | |
| 327 | fail: |
| 328 | *data += *data_len; |
| 329 | *data_len = 0; |
| 330 | return -1; |
| 331 | } |
| 332 | |
| 333 | int lv_shift(uint8_t **data, size_t *data_len, |
| 334 | uint8_t **value, size_t *value_len) |
| 335 | { |
| 336 | size_t len; |
| 337 | size_t ie_len; |
| 338 | |
| 339 | if (*data_len < 1) |
| 340 | goto fail; |
| 341 | |
| 342 | len = (*data)[0]; |
| 343 | if (len > *data_len - 1) |
| 344 | goto fail; |
| 345 | |
| 346 | if (value) |
| 347 | *value = *data + 1; |
| 348 | if (value_len) |
| 349 | *value_len = len; |
| 350 | |
| 351 | ie_len = len + 1; |
| 352 | *data += ie_len; |
| 353 | *data_len -= ie_len; |
| 354 | |
| 355 | return ie_len; |
| 356 | |
| 357 | fail: |
| 358 | *data += *data_len; |
| 359 | *data_len = 0; |
| 360 | return -1; |
| 361 | } |
| 362 | |
Jacob Erlbeck | 58da91d | 2014-08-07 13:11:34 +0200 | [diff] [blame] | 363 | /* GSM 04.08, 10.5.1.4 */ |
| 364 | static int is_mi_tmsi(const uint8_t *value, size_t value_len) |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 365 | { |
| 366 | if (value_len != GSM48_TMSI_LEN) |
| 367 | return 0; |
| 368 | |
Jacob Erlbeck | 291f050 | 2014-08-07 10:46:29 +0200 | [diff] [blame] | 369 | if (!value || (value[0] & GSM_MI_TYPE_MASK) != GSM_MI_TYPE_TMSI) |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 370 | return 0; |
| 371 | |
| 372 | return 1; |
| 373 | } |
| 374 | |
Jacob Erlbeck | 58da91d | 2014-08-07 13:11:34 +0200 | [diff] [blame] | 375 | /* GSM 04.08, 10.5.1.4 */ |
| 376 | static int is_mi_imsi(const uint8_t *value, size_t value_len) |
Jacob Erlbeck | 690768a | 2014-08-06 15:16:45 +0200 | [diff] [blame] | 377 | { |
| 378 | if (value_len == 0) |
| 379 | return 0; |
| 380 | |
Jacob Erlbeck | 291f050 | 2014-08-07 10:46:29 +0200 | [diff] [blame] | 381 | if (!value || (value[0] & GSM_MI_TYPE_MASK) != GSM_MI_TYPE_IMSI) |
Jacob Erlbeck | 690768a | 2014-08-06 15:16:45 +0200 | [diff] [blame] | 382 | return 0; |
| 383 | |
| 384 | return 1; |
| 385 | } |
| 386 | |
Jacob Erlbeck | 58da91d | 2014-08-07 13:11:34 +0200 | [diff] [blame] | 387 | static int parse_mi_tmsi(const uint8_t *value, size_t value_len, uint32_t *tmsi) |
Jacob Erlbeck | 2e2650f | 2014-06-27 18:10:53 +0200 | [diff] [blame] | 388 | { |
| 389 | uint32_t tmsi_be; |
| 390 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 391 | if (!is_mi_tmsi(value, value_len)) |
Jacob Erlbeck | 2e2650f | 2014-06-27 18:10:53 +0200 | [diff] [blame] | 392 | return 0; |
| 393 | |
| 394 | memcpy(&tmsi_be, value + 1, sizeof(tmsi_be)); |
| 395 | |
| 396 | *tmsi = ntohl(tmsi_be); |
Jacob Erlbeck | 2e2650f | 2014-06-27 18:10:53 +0200 | [diff] [blame] | 397 | return 1; |
| 398 | } |
| 399 | |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 400 | struct gbproxy_parse_context { |
Jacob Erlbeck | 35cc03f | 2014-06-27 19:00:45 +0200 | [diff] [blame] | 401 | /* Pointer to protocol specific parts */ |
| 402 | struct gsm48_hdr *g48_hdr; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 403 | struct bssgp_normal_hdr *bgp_hdr; |
Jacob Erlbeck | 35cc03f | 2014-06-27 19:00:45 +0200 | [diff] [blame] | 404 | struct bssgp_ud_hdr *bud_hdr; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 405 | uint8_t *bssgp_data; |
| 406 | size_t bssgp_data_len; |
| 407 | uint8_t *llc; |
| 408 | size_t llc_len; |
Jacob Erlbeck | 35cc03f | 2014-06-27 19:00:45 +0200 | [diff] [blame] | 409 | |
| 410 | /* Extracted information */ |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 411 | struct gprs_llc_hdr_parsed llc_hdr_parsed; |
| 412 | struct tlv_parsed bssgp_tp; |
Jacob Erlbeck | 35cc03f | 2014-06-27 19:00:45 +0200 | [diff] [blame] | 413 | int to_bss; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 414 | uint8_t *tlli_enc; |
| 415 | uint8_t *imsi; |
Jacob Erlbeck | 35cc03f | 2014-06-27 19:00:45 +0200 | [diff] [blame] | 416 | size_t imsi_len; |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 417 | uint8_t *apn_ie; |
| 418 | size_t apn_ie_len; |
| 419 | uint8_t *ptmsi_enc; |
Jacob Erlbeck | 690768a | 2014-08-06 15:16:45 +0200 | [diff] [blame] | 420 | uint8_t *new_ptmsi_enc; |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 421 | uint8_t *raid_enc; |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 422 | uint8_t *old_raid_enc; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 423 | uint8_t *bssgp_raid_enc; |
| 424 | uint8_t *bssgp_ptimsi; |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 425 | |
| 426 | /* General info */ |
| 427 | const char *llc_msg_name; |
| 428 | int invalidate_tlli; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 429 | int need_decryption; |
| 430 | uint32_t tlli; |
| 431 | int pdu_type; |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 432 | int old_raid_matches; |
Jacob Erlbeck | 35cc03f | 2014-06-27 19:00:45 +0200 | [diff] [blame] | 433 | }; |
| 434 | |
Jacob Erlbeck | 59748e6 | 2014-08-11 17:26:21 +0200 | [diff] [blame] | 435 | struct gbproxy_tlli_info *gbprox_find_tlli(struct gbproxy_peer *peer, |
| 436 | uint32_t tlli) |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 437 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 438 | struct gbproxy_tlli_info *tlli_info; |
| 439 | struct gbproxy_patch_state *state = &peer->patch_state; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 440 | |
| 441 | llist_for_each_entry(tlli_info, &state->enabled_tllis, list) |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 442 | if (tlli_info->tlli.current == tlli || |
| 443 | tlli_info->tlli.assigned == tlli) |
| 444 | return tlli_info; |
| 445 | |
| 446 | return NULL; |
| 447 | } |
| 448 | |
| 449 | struct gbproxy_tlli_info *gbprox_find_tlli_by_sgsn_tlli( |
| 450 | struct gbproxy_peer *peer, |
| 451 | uint32_t tlli) |
| 452 | { |
| 453 | struct gbproxy_tlli_info *tlli_info; |
| 454 | struct gbproxy_patch_state *state = &peer->patch_state; |
| 455 | |
| 456 | llist_for_each_entry(tlli_info, &state->enabled_tllis, list) |
| 457 | if (tlli_info->sgsn_tlli.current == tlli || |
| 458 | tlli_info->sgsn_tlli.assigned == tlli) |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 459 | return tlli_info; |
| 460 | |
| 461 | return NULL; |
| 462 | } |
| 463 | |
Holger Hans Peter Freyther | 0196c99 | 2014-08-04 17:10:08 +0200 | [diff] [blame] | 464 | struct gbproxy_tlli_info *gbprox_find_tlli_by_mi( |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 465 | struct gbproxy_peer *peer, |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 466 | const uint8_t *mi_data, |
| 467 | size_t mi_data_len) |
| 468 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 469 | struct gbproxy_tlli_info *tlli_info; |
| 470 | struct gbproxy_patch_state *state = &peer->patch_state; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 471 | |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 472 | if (!is_mi_imsi(mi_data, mi_data_len)) |
| 473 | return NULL; |
| 474 | |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 475 | llist_for_each_entry(tlli_info, &state->enabled_tllis, list) { |
| 476 | if (tlli_info->mi_data_len != mi_data_len) |
| 477 | continue; |
| 478 | if (memcmp(tlli_info->mi_data, mi_data, mi_data_len) != 0) |
| 479 | continue; |
| 480 | |
| 481 | return tlli_info; |
| 482 | } |
| 483 | |
| 484 | return NULL; |
| 485 | } |
| 486 | |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 487 | void gbprox_delete_tlli(struct gbproxy_peer *peer, |
| 488 | struct gbproxy_tlli_info *tlli_info) |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 489 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 490 | struct gbproxy_patch_state *state = &peer->patch_state; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 491 | |
| 492 | llist_del(&tlli_info->list); |
| 493 | talloc_free(tlli_info); |
| 494 | state->enabled_tllis_count -= 1; |
Jacob Erlbeck | aad32bc | 2014-08-07 17:23:00 +0200 | [diff] [blame] | 495 | |
| 496 | peer->ctrg->ctr[GBPROX_PEER_CTR_TLLI_CACHE_SIZE].current = |
| 497 | state->enabled_tllis_count; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 498 | } |
| 499 | |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 500 | static void gbprox_delete_tllis(struct gbproxy_peer *peer) |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 501 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 502 | struct gbproxy_tlli_info *tlli_info, *nxt; |
| 503 | struct gbproxy_patch_state *state = &peer->patch_state; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 504 | |
Holger Hans Peter Freyther | 4d9fc42 | 2014-08-04 12:18:07 +0200 | [diff] [blame] | 505 | llist_for_each_entry_safe(tlli_info, nxt, &state->enabled_tllis, list) |
| 506 | gbprox_delete_tlli(peer, tlli_info); |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 507 | |
Holger Hans Peter Freyther | 4d9fc42 | 2014-08-04 12:18:07 +0200 | [diff] [blame] | 508 | OSMO_ASSERT(state->enabled_tllis_count == 0); |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 509 | OSMO_ASSERT(llist_empty(&state->enabled_tllis)); |
| 510 | } |
| 511 | |
Jacob Erlbeck | 29805da | 2014-08-14 08:57:04 +0200 | [diff] [blame] | 512 | void gbprox_clear_patch_filter(struct gbproxy_config *cfg) |
| 513 | { |
| 514 | if (cfg->check_imsi) { |
| 515 | regfree(&cfg->imsi_re_comp); |
| 516 | cfg->check_imsi = 0; |
| 517 | } |
| 518 | } |
| 519 | |
Holger Hans Peter Freyther | 3fa2644 | 2014-08-04 16:27:11 +0200 | [diff] [blame] | 520 | int gbprox_set_patch_filter(struct gbproxy_config *cfg, const char *filter, |
| 521 | const char **err_msg) |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 522 | { |
| 523 | static char err_buf[300]; |
| 524 | int rc; |
| 525 | |
Jacob Erlbeck | 29805da | 2014-08-14 08:57:04 +0200 | [diff] [blame] | 526 | gbprox_clear_patch_filter(cfg); |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 527 | |
| 528 | if (!filter) |
| 529 | return 0; |
| 530 | |
Holger Hans Peter Freyther | 3fa2644 | 2014-08-04 16:27:11 +0200 | [diff] [blame] | 531 | rc = regcomp(&cfg->imsi_re_comp, filter, |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 532 | REG_EXTENDED | REG_NOSUB | REG_ICASE); |
| 533 | |
| 534 | if (rc == 0) { |
Holger Hans Peter Freyther | 3fa2644 | 2014-08-04 16:27:11 +0200 | [diff] [blame] | 535 | cfg->check_imsi = 1; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 536 | return 0; |
| 537 | } |
| 538 | |
| 539 | if (err_msg) { |
Holger Hans Peter Freyther | 3fa2644 | 2014-08-04 16:27:11 +0200 | [diff] [blame] | 540 | regerror(rc, &cfg->imsi_re_comp, |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 541 | err_buf, sizeof(err_buf)); |
| 542 | *err_msg = err_buf; |
| 543 | } |
| 544 | |
| 545 | return -1; |
| 546 | } |
| 547 | |
Jacob Erlbeck | 291f050 | 2014-08-07 10:46:29 +0200 | [diff] [blame] | 548 | int gbprox_check_imsi(struct gbproxy_peer *peer, |
| 549 | const uint8_t *imsi, size_t imsi_len) |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 550 | { |
| 551 | char mi_buf[200]; |
| 552 | int rc; |
| 553 | |
Holger Hans Peter Freyther | 3fa2644 | 2014-08-04 16:27:11 +0200 | [diff] [blame] | 554 | if (!peer->cfg->check_imsi) |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 555 | return 1; |
| 556 | |
Jacob Erlbeck | 291f050 | 2014-08-07 10:46:29 +0200 | [diff] [blame] | 557 | rc = is_mi_imsi(imsi, imsi_len); |
| 558 | if (rc > 0) |
| 559 | rc = gsm48_mi_to_string(mi_buf, sizeof(mi_buf), imsi, imsi_len); |
| 560 | if (rc <= 0) { |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 561 | LOGP(DGPRS, LOGL_NOTICE, "Invalid IMSI %s\n", |
| 562 | osmo_hexdump(imsi, imsi_len)); |
| 563 | return -1; |
| 564 | } |
| 565 | |
| 566 | LOGP(DGPRS, LOGL_DEBUG, "Checking IMSI '%s' (%d)\n", mi_buf, rc); |
| 567 | |
Holger Hans Peter Freyther | 3fa2644 | 2014-08-04 16:27:11 +0200 | [diff] [blame] | 568 | rc = regexec(&peer->cfg->imsi_re_comp, mi_buf, 0, NULL, 0); |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 569 | if (rc == REG_NOMATCH) { |
| 570 | LOGP(DGPRS, LOGL_INFO, |
| 571 | "IMSI '%s' doesn't match pattern '%s'\n", |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 572 | mi_buf, peer->cfg->match_re); |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 573 | return 0; |
| 574 | } |
| 575 | |
| 576 | return 1; |
| 577 | } |
| 578 | |
Jacob Erlbeck | 58cf664 | 2014-07-03 15:52:49 +0200 | [diff] [blame] | 579 | static void gbprox_attach_tlli_info(struct gbproxy_peer *peer, time_t now, |
| 580 | struct gbproxy_tlli_info *tlli_info) |
| 581 | { |
| 582 | struct gbproxy_patch_state *state = &peer->patch_state; |
| 583 | |
| 584 | tlli_info->timestamp = now; |
| 585 | llist_add(&tlli_info->list, &state->enabled_tllis); |
| 586 | state->enabled_tllis_count += 1; |
Jacob Erlbeck | aad32bc | 2014-08-07 17:23:00 +0200 | [diff] [blame] | 587 | |
| 588 | peer->ctrg->ctr[GBPROX_PEER_CTR_TLLI_CACHE_SIZE].current = |
| 589 | state->enabled_tllis_count; |
Jacob Erlbeck | 58cf664 | 2014-07-03 15:52:49 +0200 | [diff] [blame] | 590 | } |
| 591 | |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 592 | int gbprox_remove_stale_tllis(struct gbproxy_peer *peer, time_t now) |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 593 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 594 | struct gbproxy_patch_state *state = &peer->patch_state; |
Jacob Erlbeck | 2dec985 | 2014-08-07 18:35:30 +0200 | [diff] [blame] | 595 | int exceeded_max_len = 0; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 596 | int deleted_count = 0; |
Jacob Erlbeck | 2dec985 | 2014-08-07 18:35:30 +0200 | [diff] [blame] | 597 | int check_for_age; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 598 | |
Jacob Erlbeck | 2dec985 | 2014-08-07 18:35:30 +0200 | [diff] [blame] | 599 | if (peer->cfg->tlli_max_len > 0) |
| 600 | exceeded_max_len = |
| 601 | state->enabled_tllis_count - peer->cfg->tlli_max_len; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 602 | |
Jacob Erlbeck | 2dec985 | 2014-08-07 18:35:30 +0200 | [diff] [blame] | 603 | check_for_age = peer->cfg->tlli_max_age > 0; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 604 | |
Jacob Erlbeck | 2dec985 | 2014-08-07 18:35:30 +0200 | [diff] [blame] | 605 | for (; exceeded_max_len > 0; exceeded_max_len--) { |
| 606 | struct gbproxy_tlli_info *tlli_info; |
| 607 | OSMO_ASSERT(!llist_empty(&state->enabled_tllis)); |
| 608 | tlli_info = llist_entry(state->enabled_tllis.prev, |
| 609 | struct gbproxy_tlli_info, |
| 610 | list); |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 611 | LOGP(DGPRS, LOGL_INFO, |
Jacob Erlbeck | 2dec985 | 2014-08-07 18:35:30 +0200 | [diff] [blame] | 612 | "Removing TLLI %08x from list " |
| 613 | "(stale, length %d, max_len exceeded)\n", |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 614 | tlli_info->tlli.current, state->enabled_tllis_count); |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 615 | |
| 616 | gbprox_delete_tlli(peer, tlli_info); |
Jacob Erlbeck | 2dec985 | 2014-08-07 18:35:30 +0200 | [diff] [blame] | 617 | deleted_count += 1; |
| 618 | } |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 619 | |
Jacob Erlbeck | 2dec985 | 2014-08-07 18:35:30 +0200 | [diff] [blame] | 620 | while (check_for_age && !llist_empty(&state->enabled_tllis)) { |
| 621 | time_t age; |
| 622 | struct gbproxy_tlli_info *tlli_info; |
| 623 | tlli_info = llist_entry(state->enabled_tllis.prev, |
| 624 | struct gbproxy_tlli_info, |
| 625 | list); |
| 626 | age = now - tlli_info->timestamp; |
| 627 | /* age < 0 only happens after system time jumps, discard entry */ |
| 628 | if (age <= peer->cfg->tlli_max_age && age >= 0) { |
| 629 | check_for_age = 0; |
| 630 | continue; |
| 631 | } |
| 632 | |
| 633 | LOGP(DGPRS, LOGL_INFO, |
| 634 | "Removing TLLI %08x from list " |
| 635 | "(stale, age %d, max_age exceeded)\n", |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 636 | tlli_info->tlli.current, (int)age); |
Jacob Erlbeck | 2dec985 | 2014-08-07 18:35:30 +0200 | [diff] [blame] | 637 | |
| 638 | gbprox_delete_tlli(peer, tlli_info); |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 639 | deleted_count += 1; |
| 640 | } |
| 641 | |
| 642 | return deleted_count; |
| 643 | } |
| 644 | |
Jacob Erlbeck | 311592f | 2014-08-18 15:02:17 +0200 | [diff] [blame] | 645 | static struct gbproxy_tlli_info *gbprox_tlli_info_alloc( |
| 646 | struct gbproxy_peer *peer) |
| 647 | { |
| 648 | struct gbproxy_tlli_info *tlli_info; |
| 649 | |
| 650 | tlli_info = talloc_zero(peer, struct gbproxy_tlli_info); |
| 651 | tlli_info->tlli.ptmsi = GSM_RESERVED_TMSI; |
| 652 | tlli_info->sgsn_tlli.ptmsi = GSM_RESERVED_TMSI; |
| 653 | |
| 654 | return tlli_info; |
| 655 | } |
| 656 | |
| 657 | static void gbprox_detach_tlli_info( |
Jacob Erlbeck | 58cf664 | 2014-07-03 15:52:49 +0200 | [diff] [blame] | 658 | struct gbproxy_peer *peer, |
Jacob Erlbeck | 311592f | 2014-08-18 15:02:17 +0200 | [diff] [blame] | 659 | struct gbproxy_tlli_info *tlli_info) |
Jacob Erlbeck | 58cf664 | 2014-07-03 15:52:49 +0200 | [diff] [blame] | 660 | { |
| 661 | struct gbproxy_patch_state *state = &peer->patch_state; |
| 662 | |
Jacob Erlbeck | 311592f | 2014-08-18 15:02:17 +0200 | [diff] [blame] | 663 | llist_del(&tlli_info->list); |
| 664 | OSMO_ASSERT(state->enabled_tllis_count > 0); |
| 665 | state->enabled_tllis_count -= 1; |
Jacob Erlbeck | aad32bc | 2014-08-07 17:23:00 +0200 | [diff] [blame] | 666 | |
Jacob Erlbeck | 311592f | 2014-08-18 15:02:17 +0200 | [diff] [blame] | 667 | peer->ctrg->ctr[GBPROX_PEER_CTR_TLLI_CACHE_SIZE].current = |
| 668 | state->enabled_tllis_count; |
Jacob Erlbeck | 58cf664 | 2014-07-03 15:52:49 +0200 | [diff] [blame] | 669 | } |
| 670 | |
| 671 | static void gbprox_update_tlli_info(struct gbproxy_tlli_info *tlli_info, |
| 672 | const uint8_t *imsi, size_t imsi_len) |
| 673 | { |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 674 | if (!is_mi_imsi(imsi, imsi_len)) |
| 675 | return; |
| 676 | |
Jacob Erlbeck | 58cf664 | 2014-07-03 15:52:49 +0200 | [diff] [blame] | 677 | tlli_info->mi_data_len = imsi_len; |
| 678 | tlli_info->mi_data = |
| 679 | talloc_realloc_size(tlli_info, tlli_info->mi_data, imsi_len); |
| 680 | OSMO_ASSERT(tlli_info->mi_data != NULL); |
| 681 | memcpy(tlli_info->mi_data, imsi, imsi_len); |
| 682 | } |
| 683 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 684 | void gbprox_reassign_tlli(struct gbproxy_tlli_state *tlli_state, |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 685 | struct gbproxy_peer *peer, uint32_t new_tlli) |
| 686 | { |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 687 | if (new_tlli == tlli_state->current) |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 688 | return; |
| 689 | |
| 690 | LOGP(DGPRS, LOGL_INFO, |
| 691 | "The TLLI has been reassigned from %08x to %08x\n", |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 692 | tlli_state->current, new_tlli); |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 693 | |
Jacob Erlbeck | 59748e6 | 2014-08-11 17:26:21 +0200 | [diff] [blame] | 694 | /* Remember assigned TLLI */ |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 695 | tlli_state->assigned = new_tlli; |
| 696 | tlli_state->bss_validated = 0; |
| 697 | tlli_state->net_validated = 0; |
Jacob Erlbeck | 59748e6 | 2014-08-11 17:26:21 +0200 | [diff] [blame] | 698 | } |
| 699 | |
Jacob Erlbeck | e37487e | 2014-08-18 17:01:32 +0200 | [diff] [blame] | 700 | static uint32_t gbprox_map_tlli(uint32_t other_tlli, |
| 701 | struct gbproxy_tlli_info *tlli_info, int to_bss) |
| 702 | { |
| 703 | uint32_t tlli = 0; |
| 704 | struct gbproxy_tlli_state *src, *dst; |
| 705 | if (to_bss) { |
| 706 | src = &tlli_info->sgsn_tlli; |
| 707 | dst = &tlli_info->tlli; |
| 708 | } else { |
| 709 | src = &tlli_info->tlli; |
| 710 | dst = &tlli_info->sgsn_tlli; |
| 711 | } |
| 712 | if (src->current == other_tlli) |
| 713 | tlli = dst->current; |
| 714 | else if (src->assigned == other_tlli) |
| 715 | tlli = dst->assigned; |
| 716 | |
| 717 | return tlli; |
| 718 | } |
| 719 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 720 | static void gbprox_validate_tlli(struct gbproxy_tlli_state *tlli_state, |
Jacob Erlbeck | 59748e6 | 2014-08-11 17:26:21 +0200 | [diff] [blame] | 721 | uint32_t tlli, int to_bss) |
| 722 | { |
| 723 | LOGP(DGPRS, LOGL_DEBUG, |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 724 | "%s({current = %08x, assigned = %08x, net_vld = %d, bss_vld = %d}, %08x)\n", |
| 725 | __func__, tlli_state->current, tlli_state->assigned, |
| 726 | tlli_state->net_validated, tlli_state->bss_validated, tlli); |
Jacob Erlbeck | 59748e6 | 2014-08-11 17:26:21 +0200 | [diff] [blame] | 727 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 728 | if (!tlli_state->assigned || tlli_state->assigned != tlli) |
Jacob Erlbeck | 59748e6 | 2014-08-11 17:26:21 +0200 | [diff] [blame] | 729 | return; |
| 730 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 731 | /* TODO: Is this ok? Check spec */ |
Jacob Erlbeck | 59748e6 | 2014-08-11 17:26:21 +0200 | [diff] [blame] | 732 | if (gprs_tlli_type(tlli) != TLLI_LOCAL) |
| 733 | return; |
| 734 | |
| 735 | /* See GSM 04.08, 4.7.1.5 */ |
| 736 | if (to_bss) |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 737 | tlli_state->net_validated = 1; |
Jacob Erlbeck | 59748e6 | 2014-08-11 17:26:21 +0200 | [diff] [blame] | 738 | else |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 739 | tlli_state->bss_validated = 1; |
Jacob Erlbeck | 59748e6 | 2014-08-11 17:26:21 +0200 | [diff] [blame] | 740 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 741 | if (!tlli_state->bss_validated || !tlli_state->net_validated) |
Jacob Erlbeck | 59748e6 | 2014-08-11 17:26:21 +0200 | [diff] [blame] | 742 | return; |
| 743 | |
| 744 | LOGP(DGPRS, LOGL_INFO, |
| 745 | "The TLLI %08x has been validated (was %08x)\n", |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 746 | tlli_state->assigned, tlli_state->current); |
Jacob Erlbeck | 59748e6 | 2014-08-11 17:26:21 +0200 | [diff] [blame] | 747 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 748 | tlli_state->current = tlli; |
| 749 | tlli_state->assigned = 0; |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 750 | } |
| 751 | |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 752 | void gbprox_touch_tlli(struct gbproxy_peer *peer, |
| 753 | struct gbproxy_tlli_info *tlli_info, time_t now) |
| 754 | { |
Jacob Erlbeck | 311592f | 2014-08-18 15:02:17 +0200 | [diff] [blame] | 755 | gbprox_detach_tlli_info(peer, tlli_info); |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 756 | gbprox_attach_tlli_info(peer, now, tlli_info); |
| 757 | } |
| 758 | |
| 759 | struct gbproxy_tlli_info *gbprox_register_tlli( |
| 760 | struct gbproxy_peer *peer, uint32_t tlli, |
| 761 | const uint8_t *imsi, size_t imsi_len, time_t now) |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 762 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 763 | struct gbproxy_tlli_info *tlli_info; |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 764 | int enable_patching = -1; |
Jacob Erlbeck | 58cf664 | 2014-07-03 15:52:49 +0200 | [diff] [blame] | 765 | int tlli_already_known; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 766 | |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 767 | /* Check, whether the IMSI matches */ |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 768 | if (is_mi_imsi(imsi, imsi_len)) { |
| 769 | enable_patching = gbprox_check_imsi(peer, imsi, imsi_len); |
| 770 | if (enable_patching < 0) |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 771 | return NULL; |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 772 | } |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 773 | |
Jacob Erlbeck | 58cf664 | 2014-07-03 15:52:49 +0200 | [diff] [blame] | 774 | tlli_info = gbprox_find_tlli(peer, tlli); |
| 775 | |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 776 | if (!tlli_info) { |
| 777 | tlli_info = gbprox_find_tlli_by_mi(peer, imsi, imsi_len); |
| 778 | |
| 779 | if (tlli_info) { |
| 780 | /* TLLI has changed somehow, adjust it */ |
| 781 | LOGP(DGPRS, LOGL_INFO, |
| 782 | "The TLLI has changed from %08x to %08x\n", |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 783 | tlli_info->tlli.current, tlli); |
| 784 | tlli_info->tlli.current = tlli; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 785 | } |
| 786 | } |
| 787 | |
Jacob Erlbeck | 311592f | 2014-08-18 15:02:17 +0200 | [diff] [blame] | 788 | if (!tlli_info) { |
| 789 | tlli_info = gbprox_tlli_info_alloc(peer); |
| 790 | tlli_info->tlli.current = tlli; |
| 791 | } else { |
| 792 | gbprox_detach_tlli_info(peer, tlli_info); |
| 793 | tlli_already_known = 1; |
| 794 | } |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 795 | |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 796 | OSMO_ASSERT(tlli_info != NULL); |
| 797 | |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 798 | if (!tlli_already_known) |
| 799 | LOGP(DGPRS, LOGL_INFO, "Adding TLLI %08x to list\n", tlli); |
Jacob Erlbeck | 58cf664 | 2014-07-03 15:52:49 +0200 | [diff] [blame] | 800 | |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 801 | gbprox_attach_tlli_info(peer, now, tlli_info); |
| 802 | gbprox_update_tlli_info(tlli_info, imsi, imsi_len); |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 803 | |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 804 | if (enable_patching >= 0) |
| 805 | tlli_info->enable_patching = enable_patching; |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 806 | |
| 807 | return tlli_info; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 808 | } |
| 809 | |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 810 | static void gbprox_unregister_tlli(struct gbproxy_peer *peer, uint32_t tlli) |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 811 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 812 | struct gbproxy_tlli_info *tlli_info; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 813 | |
| 814 | tlli_info = gbprox_find_tlli(peer, tlli); |
| 815 | if (tlli_info) { |
| 816 | LOGP(DGPRS, LOGL_INFO, |
| 817 | "Removing TLLI %08x from list\n", |
| 818 | tlli); |
Holger Hans Peter Freyther | 4d9fc42 | 2014-08-04 12:18:07 +0200 | [diff] [blame] | 819 | gbprox_delete_tlli(peer, tlli_info); |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 820 | } |
| 821 | } |
| 822 | |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 823 | static int gbprox_check_tlli(struct gbproxy_peer *peer, uint32_t tlli) |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 824 | { |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 825 | struct gbproxy_tlli_info *tlli_info; |
| 826 | |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 827 | LOGP(DGPRS, LOGL_INFO, "Checking TLLI %08x, class: %d\n", |
| 828 | tlli, gprs_tlli_type(tlli)); |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 829 | |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 830 | if (!peer->cfg->check_imsi) |
| 831 | return 1; |
| 832 | |
| 833 | tlli_info = gbprox_find_tlli(peer, tlli); |
| 834 | |
| 835 | return tlli_info != NULL && tlli_info->enable_patching; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 836 | } |
| 837 | |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 838 | /* check whether patching is enabled at this level */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 839 | static int patching_is_enabled(struct gbproxy_peer *peer, |
| 840 | enum gbproxy_patch_mode need_at_least) |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 841 | { |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 842 | enum gbproxy_patch_mode patch_mode = peer->cfg->patch_mode; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 843 | if (patch_mode == GBPROX_PATCH_DEFAULT) |
| 844 | patch_mode = GBPROX_PATCH_LLC; |
| 845 | |
| 846 | return need_at_least <= patch_mode; |
| 847 | } |
| 848 | |
| 849 | /* check whether patching is enabled at this level */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 850 | static int patching_is_required(struct gbproxy_peer *peer, |
| 851 | enum gbproxy_patch_mode need_at_least) |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 852 | { |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 853 | return need_at_least <= peer->cfg->patch_mode; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 854 | } |
| 855 | |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 856 | /* update peer according to the BSS message */ |
| 857 | static void gbprox_update_current_raid(uint8_t *raid_enc, |
| 858 | struct gbproxy_peer *peer, |
| 859 | const char *log_text) |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 860 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 861 | struct gbproxy_patch_state *state = &peer->patch_state; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 862 | const int old_local_mcc = state->local_mcc; |
| 863 | const int old_local_mnc = state->local_mnc; |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 864 | struct gprs_ra_id raid; |
| 865 | |
| 866 | if (!raid_enc) |
| 867 | return; |
| 868 | |
| 869 | gsm48_parse_ra(&raid, raid_enc); |
| 870 | |
| 871 | /* save source side MCC/MNC */ |
| 872 | if (!peer->cfg->core_mcc || raid.mcc == peer->cfg->core_mcc) { |
| 873 | state->local_mcc = 0; |
| 874 | } else { |
| 875 | state->local_mcc = raid.mcc; |
| 876 | } |
| 877 | |
| 878 | if (!peer->cfg->core_mnc || raid.mnc == peer->cfg->core_mnc) { |
| 879 | state->local_mnc = 0; |
| 880 | } else { |
| 881 | state->local_mnc = raid.mnc; |
| 882 | } |
| 883 | |
| 884 | if (old_local_mcc != state->local_mcc || |
| 885 | old_local_mnc != state->local_mnc) |
| 886 | LOGP(DGPRS, LOGL_NOTICE, |
| 887 | "Patching RAID %sactivated, msg: %s, " |
| 888 | "local: %d-%d, core: %d-%d\n", |
| 889 | state->local_mcc || state->local_mnc ? |
| 890 | "" : "de", |
| 891 | log_text, |
| 892 | state->local_mcc, state->local_mnc, |
| 893 | peer->cfg->core_mcc, peer->cfg->core_mnc); |
| 894 | } |
| 895 | |
| 896 | /* patch RA identifier in place */ |
| 897 | static void gbprox_patch_raid(uint8_t *raid_enc, struct gbproxy_peer *peer, |
| 898 | int to_bss, const char *log_text) |
| 899 | { |
| 900 | struct gbproxy_patch_state *state = &peer->patch_state; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 901 | int old_mcc; |
| 902 | int old_mnc; |
| 903 | struct gprs_ra_id raid; |
| 904 | |
| 905 | gsm48_parse_ra(&raid, raid_enc); |
| 906 | |
| 907 | old_mcc = raid.mcc; |
| 908 | old_mnc = raid.mnc; |
| 909 | |
| 910 | if (!to_bss) { |
| 911 | /* BSS -> SGSN */ |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 912 | if (state->local_mcc) |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 913 | raid.mcc = peer->cfg->core_mcc; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 914 | |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 915 | if (state->local_mnc) |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 916 | raid.mnc = peer->cfg->core_mnc; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 917 | } else { |
| 918 | /* SGSN -> BSS */ |
| 919 | if (state->local_mcc) |
| 920 | raid.mcc = state->local_mcc; |
| 921 | |
| 922 | if (state->local_mnc) |
| 923 | raid.mnc = state->local_mnc; |
| 924 | } |
| 925 | |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 926 | if (state->local_mcc || state->local_mnc) { |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 927 | enum gbprox_peer_ctr counter = |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 928 | to_bss ? |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 929 | GBPROX_PEER_CTR_RAID_PATCHED_SGSN : |
| 930 | GBPROX_PEER_CTR_RAID_PATCHED_BSS; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 931 | |
| 932 | LOGP(DGPRS, LOGL_DEBUG, |
| 933 | "Patching %s to %s: " |
| 934 | "%d-%d-%d-%d -> %d-%d-%d-%d\n", |
| 935 | log_text, |
| 936 | to_bss ? "BSS" : "SGSN", |
| 937 | old_mcc, old_mnc, raid.lac, raid.rac, |
| 938 | raid.mcc, raid.mnc, raid.lac, raid.rac); |
| 939 | |
| 940 | gsm48_construct_ra(raid_enc, &raid); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 941 | rate_ctr_inc(&peer->ctrg->ctr[counter]); |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 942 | } |
| 943 | } |
| 944 | |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 945 | static void gbprox_patch_apn_ie(struct msgb *msg, |
| 946 | uint8_t *apn_ie, size_t apn_ie_len, |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 947 | struct gbproxy_peer *peer, |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 948 | size_t *new_apn_ie_len, const char *log_text) |
| 949 | { |
| 950 | struct apn_ie_hdr { |
| 951 | uint8_t iei; |
| 952 | uint8_t apn_len; |
| 953 | uint8_t apn[0]; |
| 954 | } *hdr = (void *)apn_ie; |
| 955 | |
| 956 | size_t apn_len = hdr->apn_len; |
| 957 | uint8_t *apn = hdr->apn; |
| 958 | |
| 959 | OSMO_ASSERT(apn_ie_len == apn_len + sizeof(struct apn_ie_hdr)); |
| 960 | OSMO_ASSERT(apn_ie_len > 2 && apn_ie_len <= 102); |
| 961 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 962 | if (peer->cfg->core_apn_size == 0) { |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 963 | char str1[110]; |
| 964 | /* Remove the IE */ |
| 965 | LOGP(DGPRS, LOGL_DEBUG, |
| 966 | "Patching %s to SGSN: Removing APN '%s'\n", |
| 967 | log_text, |
Holger Hans Peter Freyther | 7127b02 | 2014-08-04 11:52:52 +0200 | [diff] [blame] | 968 | gprs_apn_to_str(str1, apn, apn_len)); |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 969 | |
| 970 | *new_apn_ie_len = 0; |
Holger Hans Peter Freyther | 7127b02 | 2014-08-04 11:52:52 +0200 | [diff] [blame] | 971 | gprs_msgb_resize_area(msg, apn_ie, apn_ie_len, 0); |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 972 | } else { |
| 973 | /* Resize the IE */ |
| 974 | char str1[110]; |
| 975 | char str2[110]; |
| 976 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 977 | OSMO_ASSERT(peer->cfg->core_apn_size <= 100); |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 978 | |
| 979 | LOGP(DGPRS, LOGL_DEBUG, |
| 980 | "Patching %s to SGSN: " |
| 981 | "Replacing APN '%s' -> '%s'\n", |
| 982 | log_text, |
Holger Hans Peter Freyther | 7127b02 | 2014-08-04 11:52:52 +0200 | [diff] [blame] | 983 | gprs_apn_to_str(str1, apn, apn_len), |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 984 | gprs_apn_to_str(str2, peer->cfg->core_apn, |
| 985 | peer->cfg->core_apn_size)); |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 986 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 987 | *new_apn_ie_len = peer->cfg->core_apn_size + 2; |
| 988 | gprs_msgb_resize_area(msg, apn, apn_len, peer->cfg->core_apn_size); |
| 989 | memcpy(apn, peer->cfg->core_apn, peer->cfg->core_apn_size); |
| 990 | hdr->apn_len = peer->cfg->core_apn_size; |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 991 | } |
| 992 | |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 993 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_APN_PATCHED]); |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 994 | } |
| 995 | |
Jacob Erlbeck | 03ca10e | 2014-08-18 17:23:01 +0200 | [diff] [blame] | 996 | static int gbprox_patch_tlli(uint8_t *tlli_enc, |
| 997 | struct gbproxy_peer *peer, |
| 998 | uint32_t new_tlli, |
| 999 | int to_bss, const char *log_text) |
| 1000 | { |
| 1001 | uint32_t tlli_be; |
| 1002 | uint32_t tlli; |
| 1003 | enum gbprox_peer_ctr counter = |
| 1004 | to_bss ? |
| 1005 | GBPROX_PEER_CTR_TLLI_PATCHED_SGSN : |
| 1006 | GBPROX_PEER_CTR_TLLI_PATCHED_BSS; |
| 1007 | |
| 1008 | memcpy(&tlli_be, tlli_enc, sizeof(tlli_be)); |
| 1009 | tlli = ntohl(tlli_be); |
| 1010 | |
| 1011 | if (tlli == new_tlli) |
| 1012 | return 0; |
| 1013 | |
| 1014 | LOGP(DGPRS, LOGL_DEBUG, |
| 1015 | "Patching %ss: " |
| 1016 | "Replacing %08x -> %08x\n", |
| 1017 | log_text, tlli, new_tlli); |
| 1018 | |
| 1019 | tlli_be = htonl(new_tlli); |
| 1020 | memcpy(tlli_enc, &tlli_be, sizeof(tlli_be)); |
| 1021 | |
| 1022 | rate_ctr_inc(&peer->ctrg->ctr[counter]); |
| 1023 | |
| 1024 | return 1; |
| 1025 | } |
| 1026 | |
| 1027 | static int gbprox_patch_ptmsi(uint8_t *ptmsi_enc, |
| 1028 | struct gbproxy_peer *peer, |
| 1029 | uint32_t new_ptmsi, |
| 1030 | int to_bss, const char *log_text) |
| 1031 | { |
| 1032 | uint32_t ptmsi_be; |
| 1033 | uint32_t ptmsi; |
| 1034 | enum gbprox_peer_ctr counter = |
| 1035 | to_bss ? |
| 1036 | GBPROX_PEER_CTR_PTMSI_PATCHED_SGSN : |
| 1037 | GBPROX_PEER_CTR_PTMSI_PATCHED_BSS; |
| 1038 | memcpy(&ptmsi_be, ptmsi_enc + 1, sizeof(ptmsi_be)); |
| 1039 | ptmsi = ntohl(ptmsi_be); |
| 1040 | |
| 1041 | if (ptmsi == new_ptmsi) |
| 1042 | return 0; |
| 1043 | |
| 1044 | LOGP(DGPRS, LOGL_DEBUG, |
| 1045 | "Patching %ss: " |
| 1046 | "Replacing %08x -> %08x\n", |
| 1047 | log_text, ptmsi, new_ptmsi); |
| 1048 | |
| 1049 | ptmsi_be = htonl(new_ptmsi); |
| 1050 | memcpy(ptmsi_enc + 1, &ptmsi_be, sizeof(ptmsi_be)); |
| 1051 | |
| 1052 | rate_ctr_inc(&peer->ctrg->ctr[counter]); |
| 1053 | |
| 1054 | return 1; |
| 1055 | } |
| 1056 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1057 | static int gbprox_parse_gmm_attach_req(uint8_t *data, size_t data_len, |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 1058 | struct gbproxy_parse_context *parse_ctx) |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1059 | { |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1060 | uint8_t *value; |
| 1061 | size_t value_len; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1062 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1063 | parse_ctx->llc_msg_name = "ATTACH_REQ"; |
| 1064 | |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1065 | /* Skip MS network capability */ |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1066 | if (lv_shift(&data, &data_len, NULL, &value_len) <= 0 || |
| 1067 | value_len < 1 || value_len > 2) |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1068 | /* invalid */ |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1069 | return 0;; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1070 | |
| 1071 | /* Skip Attach type */ |
| 1072 | /* Skip Ciphering key sequence number */ |
| 1073 | /* Skip DRX parameter */ |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1074 | v_fixed_shift(&data, &data_len, 3, NULL); |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1075 | |
Jacob Erlbeck | 690768a | 2014-08-06 15:16:45 +0200 | [diff] [blame] | 1076 | /* Get Mobile identity */ |
| 1077 | if (lv_shift(&data, &data_len, &value, &value_len) <= 0 || |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1078 | value_len < 5 || value_len > 8) |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1079 | /* invalid */ |
Jacob Erlbeck | 690768a | 2014-08-06 15:16:45 +0200 | [diff] [blame] | 1080 | return 0; |
| 1081 | |
| 1082 | if (is_mi_tmsi(value, value_len)) { |
| 1083 | parse_ctx->ptmsi_enc = value; |
| 1084 | } else if (is_mi_imsi(value, value_len)) { |
| 1085 | parse_ctx->imsi = value; |
| 1086 | parse_ctx->imsi_len = value_len; |
| 1087 | } |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1088 | |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1089 | if (v_fixed_shift(&data, &data_len, 6, &value) <= 0) |
| 1090 | return 0; |
| 1091 | |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 1092 | parse_ctx->old_raid_enc = value; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1093 | |
| 1094 | return 1; |
| 1095 | } |
| 1096 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1097 | static int gbprox_parse_gmm_attach_ack(uint8_t *data, size_t data_len, |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 1098 | struct gbproxy_parse_context *parse_ctx) |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1099 | { |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1100 | uint8_t *value; |
Jacob Erlbeck | 2e2650f | 2014-06-27 18:10:53 +0200 | [diff] [blame] | 1101 | size_t value_len; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1102 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1103 | parse_ctx->llc_msg_name = "ATTACH_ACK"; |
| 1104 | |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1105 | /* Skip Attach result */ |
| 1106 | /* Skip Force to standby */ |
| 1107 | /* Skip Periodic RA update timer */ |
| 1108 | /* Skip Radio priority for SMS */ |
| 1109 | /* Skip Spare half octet */ |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1110 | v_fixed_shift(&data, &data_len, 3, NULL); |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1111 | |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1112 | if (v_fixed_shift(&data, &data_len, 6, &value) <= 0) |
| 1113 | return 0; |
| 1114 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1115 | parse_ctx->raid_enc = value; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1116 | |
Jacob Erlbeck | 2e2650f | 2014-06-27 18:10:53 +0200 | [diff] [blame] | 1117 | /* Skip P-TMSI signature (P-TMSI signature, opt, TV, length 4) */ |
| 1118 | tv_fixed_match(&data, &data_len, GSM48_IE_GMM_PTMSI_SIG, 3, NULL); |
| 1119 | |
| 1120 | /* Skip Negotiated READY timer value (GPRS timer, opt, TV, length 2) */ |
| 1121 | tv_fixed_match(&data, &data_len, GSM48_IE_GMM_TIMER_READY, 1, NULL); |
| 1122 | |
| 1123 | /* Allocated P-TMSI (Mobile identity, opt, TLV, length 7) */ |
| 1124 | if (tlv_match(&data, &data_len, GSM48_IE_GMM_ALLOC_PTMSI, |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1125 | &value, &value_len) > 0 && |
| 1126 | is_mi_tmsi(value, value_len)) |
Jacob Erlbeck | 690768a | 2014-08-06 15:16:45 +0200 | [diff] [blame] | 1127 | parse_ctx->new_ptmsi_enc = value; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1128 | return 1; |
| 1129 | } |
| 1130 | |
Jacob Erlbeck | 3e23ddf | 2014-08-11 15:07:37 +0200 | [diff] [blame] | 1131 | static int gbprox_parse_gmm_detach_req(uint8_t *data, size_t data_len, |
| 1132 | struct gbproxy_parse_context *parse_ctx) |
| 1133 | { |
| 1134 | uint8_t *value; |
| 1135 | size_t value_len; |
| 1136 | int detach_type; |
| 1137 | int power_off; |
| 1138 | |
| 1139 | parse_ctx->llc_msg_name = "DETACH_REQ"; |
| 1140 | |
| 1141 | /* Skip spare half octet */ |
| 1142 | /* Get Detach type */ |
| 1143 | if (v_fixed_shift(&data, &data_len, 1, &value) <= 0) |
| 1144 | /* invalid */ |
| 1145 | return 0; |
| 1146 | |
| 1147 | detach_type = *value & 0x07; |
| 1148 | power_off = *value & 0x08 ? 1 : 0; |
| 1149 | |
| 1150 | if (!parse_ctx->to_bss) { |
| 1151 | /* Mobile originated */ |
| 1152 | |
| 1153 | if (power_off) |
| 1154 | parse_ctx->invalidate_tlli = 1; |
| 1155 | |
| 1156 | /* Get P-TMSI (Mobile identity), see GSM 24.008, 9.4.5.2 */ |
| 1157 | if (tlv_match(&data, &data_len, |
| 1158 | GSM48_IE_GMM_ALLOC_PTMSI, &value, &value_len) > 0) |
| 1159 | { |
| 1160 | if (is_mi_tmsi(value, value_len)) |
| 1161 | parse_ctx->ptmsi_enc = value; |
| 1162 | } |
| 1163 | } |
| 1164 | |
| 1165 | return 1; |
| 1166 | } |
| 1167 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1168 | static int gbprox_parse_gmm_ra_upd_req(uint8_t *data, size_t data_len, |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 1169 | struct gbproxy_parse_context *parse_ctx) |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1170 | { |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1171 | uint8_t *value; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1172 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1173 | parse_ctx->llc_msg_name = "RA_UPD_REQ"; |
| 1174 | |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1175 | /* Skip Update type */ |
| 1176 | /* Skip GPRS ciphering key sequence number */ |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1177 | v_fixed_shift(&data, &data_len, 1, NULL); |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1178 | |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1179 | if (v_fixed_shift(&data, &data_len, 6, &value) <= 0) |
| 1180 | return 0; |
| 1181 | |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 1182 | parse_ctx->old_raid_enc = value; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1183 | |
| 1184 | return 1; |
| 1185 | } |
| 1186 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1187 | static int gbprox_parse_gmm_ra_upd_ack(uint8_t *data, size_t data_len, |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 1188 | struct gbproxy_parse_context *parse_ctx) |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1189 | { |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1190 | uint8_t *value; |
Jacob Erlbeck | 2e2650f | 2014-06-27 18:10:53 +0200 | [diff] [blame] | 1191 | size_t value_len; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1192 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1193 | parse_ctx->llc_msg_name = "RA_UPD_ACK"; |
| 1194 | |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1195 | /* Skip Force to standby */ |
| 1196 | /* Skip Update result */ |
| 1197 | /* Skip Periodic RA update timer */ |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1198 | v_fixed_shift(&data, &data_len, 2, NULL); |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1199 | |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1200 | if (v_fixed_shift(&data, &data_len, 6, &value) <= 0) |
| 1201 | return 0; |
| 1202 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1203 | parse_ctx->raid_enc = value; |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1204 | |
Jacob Erlbeck | 2e2650f | 2014-06-27 18:10:53 +0200 | [diff] [blame] | 1205 | /* Skip P-TMSI signature (P-TMSI signature, opt, TV, length 4) */ |
| 1206 | tv_fixed_match(&data, &data_len, GSM48_IE_GMM_PTMSI_SIG, 3, NULL); |
| 1207 | |
| 1208 | /* Allocated P-TMSI (Mobile identity, opt, TLV, length 7) */ |
| 1209 | if (tlv_match(&data, &data_len, GSM48_IE_GMM_ALLOC_PTMSI, |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1210 | &value, &value_len) > 0 && |
| 1211 | is_mi_tmsi(value, value_len)) |
Jacob Erlbeck | 690768a | 2014-08-06 15:16:45 +0200 | [diff] [blame] | 1212 | parse_ctx->new_ptmsi_enc = value; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1213 | |
| 1214 | return 1; |
| 1215 | } |
| 1216 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1217 | static int gbprox_parse_gmm_ptmsi_reall_cmd(uint8_t *data, size_t data_len, |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 1218 | struct gbproxy_parse_context *parse_ctx) |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1219 | { |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1220 | uint8_t *value; |
| 1221 | size_t value_len; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1222 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1223 | parse_ctx->llc_msg_name = "PTMSI_REALL_CMD"; |
| 1224 | |
Jacob Erlbeck | 2e2650f | 2014-06-27 18:10:53 +0200 | [diff] [blame] | 1225 | LOGP(DLLC, LOGL_NOTICE, |
| 1226 | "Got P-TMSI Reallocation Command which is not covered by unit tests yet.\n"); |
| 1227 | |
| 1228 | /* Allocated P-TMSI */ |
| 1229 | if (lv_shift(&data, &data_len, &value, &value_len) > 0 && |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1230 | is_mi_tmsi(value, value_len)) |
Jacob Erlbeck | 690768a | 2014-08-06 15:16:45 +0200 | [diff] [blame] | 1231 | parse_ctx->new_ptmsi_enc = value; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1232 | |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1233 | if (v_fixed_shift(&data, &data_len, 6, &value) <= 0) |
| 1234 | return 0; |
| 1235 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1236 | parse_ctx->raid_enc = value; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1237 | |
| 1238 | return 1; |
| 1239 | } |
| 1240 | |
Jacob Erlbeck | 690768a | 2014-08-06 15:16:45 +0200 | [diff] [blame] | 1241 | static int gbprox_parse_gmm_id_resp(uint8_t *data, size_t data_len, |
| 1242 | struct gbproxy_parse_context *parse_ctx) |
| 1243 | { |
| 1244 | uint8_t *value; |
| 1245 | size_t value_len; |
| 1246 | |
| 1247 | parse_ctx->llc_msg_name = "ID_RESP"; |
| 1248 | |
| 1249 | /* Mobile identity, Mobile identity 10.5.1.4, M LV 2-10 */ |
| 1250 | if (lv_shift(&data, &data_len, &value, &value_len) <= 0 || |
| 1251 | value_len < 1 || value_len > 9) |
| 1252 | /* invalid */ |
| 1253 | return 0; |
| 1254 | |
| 1255 | if (is_mi_tmsi(value, value_len)) { |
| 1256 | parse_ctx->ptmsi_enc = value; |
| 1257 | } else if (is_mi_imsi(value, value_len)) { |
| 1258 | parse_ctx->imsi = value; |
| 1259 | parse_ctx->imsi_len = value_len; |
| 1260 | } |
| 1261 | |
| 1262 | return 1; |
| 1263 | } |
| 1264 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1265 | static int gbprox_parse_gsm_act_pdp_req(uint8_t *data, size_t data_len, |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 1266 | struct gbproxy_parse_context *parse_ctx) |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 1267 | { |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1268 | ssize_t old_len; |
| 1269 | uint8_t *value; |
| 1270 | size_t value_len; |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1271 | |
| 1272 | parse_ctx->llc_msg_name = "ACT_PDP_REQ"; |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 1273 | |
| 1274 | /* Skip Requested NSAPI */ |
| 1275 | /* Skip Requested LLC SAPI */ |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1276 | v_fixed_shift(&data, &data_len, 2, NULL); |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 1277 | |
| 1278 | /* Skip Requested QoS (support 04.08 and 24.008) */ |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1279 | if (lv_shift(&data, &data_len, NULL, &value_len) <= 0 || |
| 1280 | value_len < 4 || value_len > 14) |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 1281 | /* invalid */ |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1282 | return 0;; |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 1283 | |
| 1284 | /* Skip Requested PDP address */ |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1285 | if (lv_shift(&data, &data_len, NULL, &value_len) <= 0 || |
| 1286 | value_len < 2 || value_len > 18) |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 1287 | /* invalid */ |
| 1288 | return 0; |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 1289 | |
| 1290 | /* Access point name */ |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1291 | old_len = tlv_match(&data, &data_len, |
| 1292 | GSM48_IE_GSM_APN, &value, &value_len); |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 1293 | |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1294 | if (old_len > 0 && value_len >=1 && value_len <= 100) { |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1295 | parse_ctx->apn_ie = data - old_len; |
| 1296 | parse_ctx->apn_ie_len = old_len; |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1297 | } |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 1298 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1299 | return 1; |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 1300 | } |
| 1301 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1302 | 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] | 1303 | { |
| 1304 | if (TLVP_PRESENT(tp, BSSGP_IE_BVCI)) { |
| 1305 | uint16_t bvci; |
| 1306 | |
| 1307 | bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); |
| 1308 | if (bvci >= 2) |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1309 | return peer_by_bvci(cfg, bvci); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 1310 | } |
| 1311 | |
| 1312 | if (TLVP_PRESENT(tp, BSSGP_IE_ROUTEING_AREA)) { |
| 1313 | uint8_t *rai = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA); |
| 1314 | /* Only compare LAC part, since MCC/MNC are possibly patched. |
| 1315 | * Since the LAC of different BSS must be different when |
| 1316 | * MCC/MNC are patched, collisions shouldn't happen. */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1317 | return peer_by_lac(cfg, rai); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 1318 | } |
| 1319 | |
| 1320 | if (TLVP_PRESENT(tp, BSSGP_IE_LOCATION_AREA)) { |
| 1321 | uint8_t *lai = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_LOCATION_AREA); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1322 | return peer_by_lac(cfg, lai); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 1323 | } |
| 1324 | |
| 1325 | return NULL; |
| 1326 | } |
| 1327 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1328 | static int gbprox_parse_dtap(uint8_t *data, size_t data_len, |
Holger Hans Peter Freyther | 3748ada | 2014-08-04 16:06:20 +0200 | [diff] [blame] | 1329 | struct gbproxy_parse_context *parse_ctx) __attribute__((nonnull)); |
| 1330 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1331 | static int gbprox_parse_dtap(uint8_t *data, size_t data_len, |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 1332 | struct gbproxy_parse_context *parse_ctx) |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1333 | { |
| 1334 | struct gsm48_hdr *g48h; |
| 1335 | |
Jacob Erlbeck | aefaf92 | 2014-06-27 18:25:53 +0200 | [diff] [blame] | 1336 | if (v_fixed_shift(&data, &data_len, sizeof(*g48h), (uint8_t **)&g48h) <= 0) |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1337 | return 0; |
| 1338 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1339 | parse_ctx->g48_hdr = g48h; |
| 1340 | |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1341 | if ((g48h->proto_discr & 0x0f) != GSM48_PDISC_MM_GPRS && |
| 1342 | (g48h->proto_discr & 0x0f) != GSM48_PDISC_SM_GPRS) |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1343 | return 1; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1344 | |
| 1345 | switch (g48h->msg_type) { |
| 1346 | case GSM48_MT_GMM_ATTACH_REQ: |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1347 | return gbprox_parse_gmm_attach_req(data, data_len, parse_ctx); |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1348 | |
| 1349 | case GSM48_MT_GMM_ATTACH_ACK: |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1350 | return gbprox_parse_gmm_attach_ack(data, data_len, parse_ctx); |
Jacob Erlbeck | 25049b9 | 2014-06-27 10:44:46 +0200 | [diff] [blame] | 1351 | |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1352 | case GSM48_MT_GMM_RA_UPD_REQ: |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1353 | return gbprox_parse_gmm_ra_upd_req(data, data_len, parse_ctx); |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1354 | |
| 1355 | case GSM48_MT_GMM_RA_UPD_ACK: |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1356 | return gbprox_parse_gmm_ra_upd_ack(data, data_len, parse_ctx); |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1357 | |
| 1358 | case GSM48_MT_GMM_PTMSI_REALL_CMD: |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1359 | return gbprox_parse_gmm_ptmsi_reall_cmd(data, data_len, parse_ctx); |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1360 | |
Jacob Erlbeck | 7368528 | 2014-05-23 20:48:07 +0200 | [diff] [blame] | 1361 | case GSM48_MT_GSM_ACT_PDP_REQ: |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1362 | return gbprox_parse_gsm_act_pdp_req(data, data_len, parse_ctx); |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 1363 | |
Jacob Erlbeck | 690768a | 2014-08-06 15:16:45 +0200 | [diff] [blame] | 1364 | case GSM48_MT_GMM_ID_RESP: |
| 1365 | return gbprox_parse_gmm_id_resp(data, data_len, parse_ctx); |
Jacob Erlbeck | 690768a | 2014-08-06 15:16:45 +0200 | [diff] [blame] | 1366 | |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 1367 | case GSM48_MT_GMM_DETACH_REQ: |
Jacob Erlbeck | 3e23ddf | 2014-08-11 15:07:37 +0200 | [diff] [blame] | 1368 | return gbprox_parse_gmm_detach_req(data, data_len, parse_ctx); |
Jacob Erlbeck | 2bdd253 | 2014-08-05 18:28:51 +0200 | [diff] [blame] | 1369 | |
| 1370 | case GSM48_MT_GMM_DETACH_ACK: |
| 1371 | parse_ctx->llc_msg_name = "DETACH_ACK"; |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1372 | parse_ctx->invalidate_tlli = 1; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 1373 | break; |
| 1374 | |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1375 | default: |
| 1376 | break; |
| 1377 | }; |
| 1378 | |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1379 | return 1; |
| 1380 | } |
| 1381 | |
| 1382 | static int allow_message_patching(struct gbproxy_peer *peer, int msg_type) |
| 1383 | { |
| 1384 | if (msg_type >= GSM48_MT_GSM_ACT_PDP_REQ) { |
| 1385 | return patching_is_enabled(peer, GBPROX_PATCH_LLC_GSM); |
| 1386 | } else if (msg_type > GSM48_MT_GMM_ATTACH_REJ) { |
| 1387 | return patching_is_enabled(peer, GBPROX_PATCH_LLC); |
| 1388 | } else if (msg_type > GSM48_MT_GMM_ATTACH_REQ) { |
| 1389 | return patching_is_enabled(peer, GBPROX_PATCH_LLC_ATTACH); |
| 1390 | } else { |
| 1391 | return patching_is_enabled(peer, GBPROX_PATCH_LLC_ATTACH_REQ); |
| 1392 | } |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1393 | } |
| 1394 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1395 | static int gbprox_parse_llc(uint8_t *llc, size_t llc_len, |
| 1396 | struct gbproxy_parse_context *parse_ctx) __attribute__((nonnull)); |
Jacob Erlbeck | 2bdd253 | 2014-08-05 18:28:51 +0200 | [diff] [blame] | 1397 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1398 | static int gbprox_parse_llc(uint8_t *llc, size_t llc_len, |
| 1399 | struct gbproxy_parse_context *parse_ctx) |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1400 | { |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1401 | struct gprs_llc_hdr_parsed *ghp = &parse_ctx->llc_hdr_parsed; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1402 | int rc; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1403 | int fcs; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1404 | |
| 1405 | /* parse LLC */ |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1406 | rc = gprs_llc_hdr_parse(ghp, llc, llc_len); |
| 1407 | gprs_llc_hdr_dump(ghp); |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1408 | if (rc != 0) { |
| 1409 | LOGP(DLLC, LOGL_NOTICE, "Error during LLC header parsing\n"); |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1410 | return 0; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1411 | } |
| 1412 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1413 | fcs = gprs_llc_fcs(llc, ghp->crc_length); |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1414 | LOGP(DLLC, LOGL_DEBUG, "Got LLC message, CRC: %06x (computed %06x)\n", |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1415 | ghp->fcs, fcs); |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1416 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1417 | if (!ghp->data) |
| 1418 | return 0; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1419 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1420 | if (ghp->sapi != GPRS_SAPI_GMM) |
Jacob Erlbeck | 3b23d63 | 2014-08-18 16:50:11 +0200 | [diff] [blame] | 1421 | return 1; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1422 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1423 | if (ghp->cmd != GPRS_LLC_UI) |
Jacob Erlbeck | 3b23d63 | 2014-08-18 16:50:11 +0200 | [diff] [blame] | 1424 | return 1; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1425 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1426 | if (ghp->is_encrypted) { |
| 1427 | parse_ctx->need_decryption = 1; |
| 1428 | return 0; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1429 | } |
| 1430 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1431 | return gbprox_parse_dtap(ghp->data, ghp->data_len, parse_ctx); |
| 1432 | } |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1433 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1434 | static int gbprox_patch_llc(struct msgb *msg, uint8_t *llc, size_t llc_len, |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 1435 | struct gbproxy_peer *peer, |
| 1436 | struct gbproxy_tlli_info *tlli_info, int *len_change, |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1437 | struct gbproxy_parse_context *parse_ctx) __attribute__((nonnull)); |
Jacob Erlbeck | 35cc03f | 2014-06-27 19:00:45 +0200 | [diff] [blame] | 1438 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1439 | static int gbprox_patch_llc(struct msgb *msg, uint8_t *llc, size_t llc_len, |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 1440 | struct gbproxy_peer *peer, |
| 1441 | struct gbproxy_tlli_info *tlli_info, int *len_change, |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1442 | struct gbproxy_parse_context *parse_ctx) |
| 1443 | { |
| 1444 | struct gprs_llc_hdr_parsed *ghp = &parse_ctx->llc_hdr_parsed; |
| 1445 | int have_patched = 0; |
| 1446 | int fcs; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1447 | |
Jacob Erlbeck | 3b23d63 | 2014-08-18 16:50:11 +0200 | [diff] [blame] | 1448 | if (parse_ctx->g48_hdr && !allow_message_patching(peer, parse_ctx->g48_hdr->msg_type)) |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1449 | return have_patched; |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1450 | |
Jacob Erlbeck | 03ca10e | 2014-08-18 17:23:01 +0200 | [diff] [blame] | 1451 | if (parse_ctx->ptmsi_enc && tlli_info) { |
| 1452 | uint32_t ptmsi; |
| 1453 | if (parse_ctx->to_bss) |
| 1454 | ptmsi = tlli_info->tlli.ptmsi; |
| 1455 | else |
| 1456 | ptmsi = tlli_info->sgsn_tlli.ptmsi; |
| 1457 | |
| 1458 | if (ptmsi != GSM_RESERVED_TMSI) { |
| 1459 | if (gbprox_patch_ptmsi(parse_ctx->ptmsi_enc, peer, |
| 1460 | ptmsi, parse_ctx->to_bss, "P-TMSI")) |
| 1461 | have_patched = 1; |
| 1462 | } else { |
| 1463 | /* TODO: invalidate old RAI if present (see below) */ |
| 1464 | } |
| 1465 | } |
| 1466 | |
| 1467 | if (parse_ctx->new_ptmsi_enc && tlli_info) { |
| 1468 | uint32_t ptmsi; |
| 1469 | if (parse_ctx->to_bss) |
| 1470 | ptmsi = tlli_info->tlli.ptmsi; |
| 1471 | else |
| 1472 | ptmsi = tlli_info->sgsn_tlli.ptmsi; |
| 1473 | |
| 1474 | OSMO_ASSERT(ptmsi); |
| 1475 | if (gbprox_patch_ptmsi(parse_ctx->new_ptmsi_enc, peer, |
| 1476 | ptmsi, parse_ctx->to_bss, "new P-TMSI")) |
| 1477 | have_patched = 1; |
| 1478 | } |
| 1479 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1480 | if (parse_ctx->raid_enc) { |
| 1481 | gbprox_patch_raid(parse_ctx->raid_enc, peer, parse_ctx->to_bss, |
| 1482 | parse_ctx->llc_msg_name); |
| 1483 | have_patched = 1; |
Jacob Erlbeck | 2e2650f | 2014-06-27 18:10:53 +0200 | [diff] [blame] | 1484 | } |
| 1485 | |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 1486 | if (parse_ctx->old_raid_enc && parse_ctx->old_raid_matches) { |
| 1487 | /* TODO: Patch to invalid if P-TMSI unknown. */ |
| 1488 | gbprox_patch_raid(parse_ctx->old_raid_enc, peer, parse_ctx->to_bss, |
| 1489 | parse_ctx->llc_msg_name); |
| 1490 | have_patched = 1; |
| 1491 | } |
| 1492 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1493 | if (parse_ctx->apn_ie && |
| 1494 | peer->cfg->core_apn && |
| 1495 | !parse_ctx->to_bss && |
| 1496 | gbprox_check_tlli(peer, parse_ctx->tlli)) { |
| 1497 | size_t new_len; |
| 1498 | gbprox_patch_apn_ie(msg, |
| 1499 | parse_ctx->apn_ie, parse_ctx->apn_ie_len, |
| 1500 | peer, &new_len, parse_ctx->llc_msg_name); |
| 1501 | *len_change += (int)new_len - (int)parse_ctx->apn_ie_len; |
Jacob Erlbeck | 2bdd253 | 2014-08-05 18:28:51 +0200 | [diff] [blame] | 1502 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1503 | have_patched = 1; |
| 1504 | } |
| 1505 | |
| 1506 | if (have_patched) { |
| 1507 | llc_len += *len_change; |
| 1508 | ghp->crc_length += *len_change; |
| 1509 | |
| 1510 | /* Fix FCS */ |
| 1511 | fcs = gprs_llc_fcs(llc, ghp->crc_length); |
| 1512 | LOGP(DLLC, LOGL_DEBUG, "Updated LLC message, CRC: %06x -> %06x\n", |
| 1513 | ghp->fcs, fcs); |
| 1514 | |
| 1515 | llc[llc_len - 3] = fcs & 0xff; |
| 1516 | llc[llc_len - 2] = (fcs >> 8) & 0xff; |
| 1517 | llc[llc_len - 1] = (fcs >> 16) & 0xff; |
| 1518 | } |
| 1519 | |
| 1520 | return have_patched; |
Jacob Erlbeck | 2bdd253 | 2014-08-05 18:28:51 +0200 | [diff] [blame] | 1521 | } |
| 1522 | |
Jacob Erlbeck | 12828c1 | 2014-08-07 16:42:51 +0200 | [diff] [blame] | 1523 | static void gbprox_log_parse_context(struct gbproxy_parse_context *parse_ctx, |
| 1524 | const char *default_msg_name) |
| 1525 | { |
| 1526 | const char *msg_name = default_msg_name; |
| 1527 | const char *sep = ""; |
| 1528 | |
| 1529 | if (!parse_ctx->tlli_enc && |
| 1530 | !parse_ctx->ptmsi_enc && |
| 1531 | !parse_ctx->new_ptmsi_enc && |
| 1532 | !parse_ctx->imsi) |
| 1533 | return; |
| 1534 | |
| 1535 | if (parse_ctx->llc_msg_name) |
| 1536 | msg_name = parse_ctx->llc_msg_name; |
| 1537 | |
| 1538 | LOGP(DGPRS, LOGL_DEBUG, "%s: Got", msg_name); |
| 1539 | |
| 1540 | if (parse_ctx->tlli_enc) { |
| 1541 | LOGP(DGPRS, LOGL_DEBUG, "%s TLLI %08x", sep, parse_ctx->tlli); |
| 1542 | sep = ","; |
| 1543 | } |
| 1544 | |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 1545 | if (parse_ctx->bssgp_raid_enc) { |
| 1546 | struct gprs_ra_id raid; |
| 1547 | gsm48_parse_ra(&raid, parse_ctx->bssgp_raid_enc); |
| 1548 | LOGP(DGPRS, LOGL_DEBUG, "%s BSSGP RAID %u-%u-%u-%u", sep, |
| 1549 | raid.mcc, raid.mnc, raid.lac, raid.rac); |
| 1550 | sep = ","; |
| 1551 | } |
| 1552 | |
| 1553 | if (parse_ctx->raid_enc) { |
| 1554 | struct gprs_ra_id raid; |
| 1555 | gsm48_parse_ra(&raid, parse_ctx->raid_enc); |
| 1556 | LOGP(DGPRS, LOGL_DEBUG, "%s RAID %u-%u-%u-%u", sep, |
| 1557 | raid.mcc, raid.mnc, raid.lac, raid.rac); |
| 1558 | sep = ","; |
| 1559 | } |
| 1560 | |
| 1561 | if (parse_ctx->old_raid_enc) { |
| 1562 | struct gprs_ra_id raid; |
| 1563 | gsm48_parse_ra(&raid, parse_ctx->old_raid_enc); |
| 1564 | LOGP(DGPRS, LOGL_DEBUG, "%s old RAID %u-%u-%u-%u", sep, |
| 1565 | raid.mcc, raid.mnc, raid.lac, raid.rac); |
| 1566 | sep = ","; |
| 1567 | } |
| 1568 | |
Jacob Erlbeck | 12828c1 | 2014-08-07 16:42:51 +0200 | [diff] [blame] | 1569 | if (parse_ctx->ptmsi_enc) { |
| 1570 | uint32_t ptmsi = GSM_RESERVED_TMSI; |
| 1571 | int ok; |
| 1572 | ok = parse_mi_tmsi(parse_ctx->ptmsi_enc, GSM48_TMSI_LEN, &ptmsi); |
| 1573 | LOGP(DGPRS, LOGL_DEBUG, "%s PTMSI %08x%s", |
| 1574 | sep, ptmsi, ok ? "" : " (parse error)"); |
| 1575 | sep = ","; |
| 1576 | } |
| 1577 | |
| 1578 | if (parse_ctx->new_ptmsi_enc) { |
| 1579 | uint32_t new_ptmsi = GSM_RESERVED_TMSI; |
| 1580 | int ok; |
| 1581 | ok = parse_mi_tmsi(parse_ctx->new_ptmsi_enc, GSM48_TMSI_LEN, |
| 1582 | &new_ptmsi); |
| 1583 | LOGP(DGPRS, LOGL_DEBUG, "%s new PTMSI %08x%s", |
| 1584 | sep, new_ptmsi, ok ? "" : " (parse error)"); |
| 1585 | sep = ","; |
| 1586 | } |
| 1587 | |
| 1588 | if (parse_ctx->imsi) { |
| 1589 | char mi_buf[200]; |
| 1590 | mi_buf[0] = '\0'; |
| 1591 | gsm48_mi_to_string(mi_buf, sizeof(mi_buf), |
| 1592 | parse_ctx->imsi, parse_ctx->imsi_len); |
| 1593 | LOGP(DGPRS, LOGL_DEBUG, "%s IMSI %s", |
| 1594 | sep, mi_buf); |
| 1595 | sep = ","; |
| 1596 | } |
Jacob Erlbeck | 3e23ddf | 2014-08-11 15:07:37 +0200 | [diff] [blame] | 1597 | if (parse_ctx->invalidate_tlli) { |
| 1598 | LOGP(DGPRS, LOGL_DEBUG, "%s invalidate", sep); |
| 1599 | sep = ","; |
| 1600 | } |
| 1601 | |
Jacob Erlbeck | 12828c1 | 2014-08-07 16:42:51 +0200 | [diff] [blame] | 1602 | LOGP(DGPRS, LOGL_DEBUG, "\n"); |
| 1603 | } |
| 1604 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1605 | static uint32_t gbprox_make_bss_ptmsi(struct gbproxy_peer *peer, |
| 1606 | uint32_t sgsn_ptmsi) |
| 1607 | { |
| 1608 | return sgsn_ptmsi; |
| 1609 | } |
| 1610 | |
| 1611 | static uint32_t gbprox_make_sgsn_tlli(struct gbproxy_peer *peer, |
Jacob Erlbeck | e37487e | 2014-08-18 17:01:32 +0200 | [diff] [blame] | 1612 | struct gbproxy_tlli_info *tlli_info, |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1613 | uint32_t bss_tlli) |
| 1614 | { |
| 1615 | return bss_tlli; |
| 1616 | } |
| 1617 | |
| 1618 | static struct gbproxy_tlli_info *gbprox_update_state_ul( |
| 1619 | struct gbproxy_peer *peer, |
| 1620 | time_t now, |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 1621 | struct gbproxy_parse_context *parse_ctx) |
Jacob Erlbeck | 2bdd253 | 2014-08-05 18:28:51 +0200 | [diff] [blame] | 1622 | { |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 1623 | struct gbproxy_tlli_info *tlli_info = NULL; |
| 1624 | |
Jacob Erlbeck | 89d3d34 | 2014-08-06 18:55:15 +0200 | [diff] [blame] | 1625 | if (parse_ctx->tlli_enc) |
| 1626 | tlli_info = gbprox_find_tlli(peer, parse_ctx->tlli); |
Jacob Erlbeck | 2bdd253 | 2014-08-05 18:28:51 +0200 | [diff] [blame] | 1627 | |
Jacob Erlbeck | 2bdd253 | 2014-08-05 18:28:51 +0200 | [diff] [blame] | 1628 | if (parse_ctx->g48_hdr) { |
| 1629 | switch (parse_ctx->g48_hdr->msg_type) { |
| 1630 | case GSM48_MT_GMM_ATTACH_REQ: |
| 1631 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_ATTACH_REQS]); |
| 1632 | break; |
| 1633 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1634 | default: |
| 1635 | break; |
| 1636 | } |
| 1637 | } |
| 1638 | |
| 1639 | gbprox_log_parse_context(parse_ctx, "BSSGP"); |
| 1640 | |
| 1641 | if (parse_ctx->tlli_enc && parse_ctx->llc) { |
| 1642 | uint32_t sgsn_tlli; |
| 1643 | if (!tlli_info) { |
| 1644 | tlli_info = |
| 1645 | gbprox_register_tlli(peer, parse_ctx->tlli, |
| 1646 | parse_ctx->imsi, |
| 1647 | parse_ctx->imsi_len, now); |
| 1648 | /* Setup TLLIs */ |
Jacob Erlbeck | e37487e | 2014-08-18 17:01:32 +0200 | [diff] [blame] | 1649 | sgsn_tlli = gbprox_make_sgsn_tlli(peer, tlli_info, |
| 1650 | parse_ctx->tlli); |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1651 | tlli_info->sgsn_tlli.current = sgsn_tlli; |
| 1652 | } else { |
Jacob Erlbeck | e37487e | 2014-08-18 17:01:32 +0200 | [diff] [blame] | 1653 | sgsn_tlli = gbprox_map_tlli(parse_ctx->tlli, tlli_info, 0); |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1654 | if (!sgsn_tlli) |
Jacob Erlbeck | e37487e | 2014-08-18 17:01:32 +0200 | [diff] [blame] | 1655 | sgsn_tlli = gbprox_make_sgsn_tlli(peer, tlli_info, |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1656 | parse_ctx->tlli); |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1657 | |
| 1658 | gbprox_validate_tlli(&tlli_info->tlli, |
| 1659 | parse_ctx->tlli, 0); |
| 1660 | gbprox_validate_tlli(&tlli_info->sgsn_tlli, |
| 1661 | sgsn_tlli, 0); |
| 1662 | gbprox_touch_tlli(peer, tlli_info, now); |
| 1663 | } |
| 1664 | } else if (tlli_info) { |
| 1665 | gbprox_touch_tlli(peer, tlli_info, now); |
| 1666 | } |
| 1667 | |
| 1668 | if (parse_ctx->imsi && tlli_info && tlli_info->mi_data_len == 0) { |
| 1669 | int enable_patching; |
| 1670 | gbprox_update_tlli_info(tlli_info, |
| 1671 | parse_ctx->imsi, parse_ctx->imsi_len); |
| 1672 | |
| 1673 | /* Check, whether the IMSI matches */ |
| 1674 | enable_patching = gbprox_check_imsi(peer, parse_ctx->imsi, |
| 1675 | parse_ctx->imsi_len); |
| 1676 | if (enable_patching >= 0) |
| 1677 | tlli_info->enable_patching = enable_patching; |
| 1678 | } |
| 1679 | |
| 1680 | return tlli_info; |
| 1681 | } |
| 1682 | |
| 1683 | static struct gbproxy_tlli_info *gbprox_update_state_dl( |
| 1684 | struct gbproxy_peer *peer, |
| 1685 | time_t now, |
| 1686 | struct gbproxy_parse_context *parse_ctx) |
| 1687 | { |
| 1688 | struct gbproxy_tlli_info *tlli_info = NULL; |
| 1689 | |
| 1690 | if (parse_ctx->tlli_enc) |
| 1691 | tlli_info = gbprox_find_tlli_by_sgsn_tlli(peer, parse_ctx->tlli); |
| 1692 | |
| 1693 | if (parse_ctx->g48_hdr) { |
| 1694 | switch (parse_ctx->g48_hdr->msg_type) { |
Jacob Erlbeck | 2bdd253 | 2014-08-05 18:28:51 +0200 | [diff] [blame] | 1695 | case GSM48_MT_GMM_ATTACH_REJ: |
| 1696 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_ATTACH_REJS]); |
| 1697 | break; |
| 1698 | |
| 1699 | default: |
| 1700 | break; |
| 1701 | } |
| 1702 | } |
| 1703 | |
Jacob Erlbeck | 12828c1 | 2014-08-07 16:42:51 +0200 | [diff] [blame] | 1704 | gbprox_log_parse_context(parse_ctx, "BSSGP"); |
Jacob Erlbeck | 2bdd253 | 2014-08-05 18:28:51 +0200 | [diff] [blame] | 1705 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1706 | if (parse_ctx->tlli_enc && parse_ctx->new_ptmsi_enc) { |
Jacob Erlbeck | fb22ac5 | 2014-08-06 18:50:05 +0200 | [diff] [blame] | 1707 | /* A new PTMSI has been signaled in the message, |
| 1708 | * register new TLLI */ |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1709 | uint32_t new_sgsn_ptmsi; |
| 1710 | uint32_t new_sgsn_tlli; |
| 1711 | uint32_t new_bss_ptmsi; |
| 1712 | uint32_t new_bss_tlli = 0; |
Jacob Erlbeck | 690768a | 2014-08-06 15:16:45 +0200 | [diff] [blame] | 1713 | if (!parse_mi_tmsi(parse_ctx->new_ptmsi_enc, GSM48_TMSI_LEN, |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1714 | &new_sgsn_ptmsi)) { |
Jacob Erlbeck | 2bdd253 | 2014-08-05 18:28:51 +0200 | [diff] [blame] | 1715 | LOGP(DGPRS, LOGL_ERROR, |
| 1716 | "Failed to parse new TLLI/PTMSI (current is %08x)\n", |
| 1717 | parse_ctx->tlli); |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 1718 | return tlli_info; |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1719 | } |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1720 | new_sgsn_tlli = gprs_tmsi2tlli(new_sgsn_ptmsi, TLLI_LOCAL); |
| 1721 | new_bss_ptmsi = gbprox_make_bss_ptmsi(peer, new_sgsn_ptmsi); |
| 1722 | if (new_bss_ptmsi != GSM_RESERVED_TMSI) |
| 1723 | new_bss_tlli = gprs_tmsi2tlli(new_bss_ptmsi, TLLI_LOCAL); |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1724 | LOGP(DGPRS, LOGL_INFO, |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1725 | "Got new TLLI(PTMSI) %08x(%08x) from SGSN, using %08x(%08x)\n", |
| 1726 | new_sgsn_tlli, new_sgsn_ptmsi, new_bss_tlli, new_bss_ptmsi); |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 1727 | if (tlli_info) { |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1728 | gbprox_reassign_tlli(&tlli_info->sgsn_tlli, |
| 1729 | peer, new_sgsn_tlli); |
| 1730 | gbprox_reassign_tlli(&tlli_info->tlli, |
| 1731 | peer, new_bss_tlli); |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 1732 | gbprox_touch_tlli(peer, tlli_info, now); |
| 1733 | } else { |
Jacob Erlbeck | e37487e | 2014-08-18 17:01:32 +0200 | [diff] [blame] | 1734 | tlli_info = gbprox_tlli_info_alloc(peer); |
| 1735 | LOGP(DGPRS, LOGL_INFO, |
| 1736 | "Adding TLLI %08x to list (SGSN, new P-TMSI)\n", |
| 1737 | new_sgsn_tlli); |
| 1738 | |
| 1739 | gbprox_attach_tlli_info(peer, now, tlli_info); |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1740 | /* Setup TLLIs */ |
| 1741 | tlli_info->sgsn_tlli.current = new_sgsn_tlli; |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 1742 | } |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1743 | /* Setup PTMSIs */ |
| 1744 | tlli_info->sgsn_tlli.ptmsi = new_sgsn_ptmsi; |
| 1745 | tlli_info->tlli.ptmsi = new_bss_ptmsi; |
| 1746 | } else if (parse_ctx->tlli_enc && parse_ctx->llc && !tlli_info) { |
| 1747 | /* Unknown SGSN TLLI */ |
Jacob Erlbeck | e37487e | 2014-08-18 17:01:32 +0200 | [diff] [blame] | 1748 | tlli_info = gbprox_tlli_info_alloc(peer); |
| 1749 | LOGP(DGPRS, LOGL_INFO, "Adding TLLI %08x to list (SGSN)\n", |
| 1750 | parse_ctx->tlli); |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1751 | |
Jacob Erlbeck | e37487e | 2014-08-18 17:01:32 +0200 | [diff] [blame] | 1752 | gbprox_attach_tlli_info(peer, now, tlli_info); |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1753 | /* Setup TLLIs */ |
Jacob Erlbeck | e37487e | 2014-08-18 17:01:32 +0200 | [diff] [blame] | 1754 | tlli_info->sgsn_tlli.current = parse_ctx->tlli; |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1755 | if (peer->cfg->patch_ptmsi) { |
| 1756 | /* TODO: We don't know the local TLLI here, perhaps add |
| 1757 | * a workaround that derives a PTMSI from the SGSN TLLI |
| 1758 | * and use that to get the missing values. This may |
| 1759 | * only happen when the gbproxy has been restarted or a |
| 1760 | * tlli_info has been discarded due to age or queue |
| 1761 | * length. |
| 1762 | */ |
| 1763 | tlli_info->tlli.current = 0; |
Jacob Erlbeck | e37487e | 2014-08-18 17:01:32 +0200 | [diff] [blame] | 1764 | } else { |
| 1765 | tlli_info->tlli.current = tlli_info->sgsn_tlli.current; |
Jacob Erlbeck | 59748e6 | 2014-08-11 17:26:21 +0200 | [diff] [blame] | 1766 | } |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1767 | } else if (parse_ctx->tlli_enc && parse_ctx->llc && tlli_info) { |
Jacob Erlbeck | e37487e | 2014-08-18 17:01:32 +0200 | [diff] [blame] | 1768 | uint32_t bss_tlli = gbprox_map_tlli(parse_ctx->tlli, |
| 1769 | tlli_info, 1); |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1770 | gbprox_validate_tlli(&tlli_info->sgsn_tlli, parse_ctx->tlli, 1); |
Jacob Erlbeck | e37487e | 2014-08-18 17:01:32 +0200 | [diff] [blame] | 1771 | gbprox_validate_tlli(&tlli_info->tlli, bss_tlli, 1); |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1772 | gbprox_touch_tlli(peer, tlli_info, now); |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 1773 | } else if (tlli_info) { |
| 1774 | gbprox_touch_tlli(peer, tlli_info, now); |
Jacob Erlbeck | 2bdd253 | 2014-08-05 18:28:51 +0200 | [diff] [blame] | 1775 | } |
| 1776 | |
Jacob Erlbeck | 3c5b40f | 2014-08-13 14:17:23 +0200 | [diff] [blame] | 1777 | if (parse_ctx->imsi && tlli_info && tlli_info->mi_data_len == 0) { |
| 1778 | int enable_patching; |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 1779 | gbprox_update_tlli_info(tlli_info, |
| 1780 | parse_ctx->imsi, parse_ctx->imsi_len); |
| 1781 | |
Jacob Erlbeck | 3c5b40f | 2014-08-13 14:17:23 +0200 | [diff] [blame] | 1782 | /* Check, whether the IMSI matches */ |
| 1783 | enable_patching = gbprox_check_imsi(peer, parse_ctx->imsi, |
| 1784 | parse_ctx->imsi_len); |
| 1785 | if (enable_patching >= 0) |
| 1786 | tlli_info->enable_patching = enable_patching; |
| 1787 | } |
| 1788 | |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 1789 | return tlli_info; |
Jacob Erlbeck | 2bdd253 | 2014-08-05 18:28:51 +0200 | [diff] [blame] | 1790 | } |
| 1791 | |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 1792 | static void gbprox_update_state_after(struct gbproxy_peer *peer, |
| 1793 | struct gbproxy_tlli_info *tlli_info, |
| 1794 | time_t now, |
Jacob Erlbeck | 2bdd253 | 2014-08-05 18:28:51 +0200 | [diff] [blame] | 1795 | struct gbproxy_parse_context *parse_ctx) |
| 1796 | { |
| 1797 | if (parse_ctx->invalidate_tlli) |
Jacob Erlbeck | 0cee7ad | 2014-08-05 15:53:43 +0200 | [diff] [blame] | 1798 | gbprox_unregister_tlli(peer, parse_ctx->tlli); |
Jacob Erlbeck | aad32bc | 2014-08-07 17:23:00 +0200 | [diff] [blame] | 1799 | |
| 1800 | gbprox_remove_stale_tllis(peer, now); |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 1801 | } |
| 1802 | |
Jacob Erlbeck | c812882 | 2014-08-07 16:07:24 +0200 | [diff] [blame] | 1803 | static int gbprox_parse_bssgp(uint8_t *bssgp, size_t bssgp_len, |
| 1804 | struct gbproxy_parse_context *parse_ctx) |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 1805 | { |
| 1806 | struct bssgp_normal_hdr *bgph; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 1807 | struct bssgp_ud_hdr *budh = NULL; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1808 | struct tlv_parsed *tp = &parse_ctx->bssgp_tp; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 1809 | uint8_t pdu_type; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 1810 | uint8_t *data; |
| 1811 | size_t data_len; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1812 | int rc; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 1813 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1814 | if (bssgp_len < sizeof(struct bssgp_normal_hdr)) |
| 1815 | return 0; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 1816 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1817 | bgph = (struct bssgp_normal_hdr *)bssgp; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 1818 | pdu_type = bgph->pdu_type; |
| 1819 | |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 1820 | if (pdu_type == BSSGP_PDUT_UL_UNITDATA || |
| 1821 | pdu_type == BSSGP_PDUT_DL_UNITDATA) { |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1822 | if (bssgp_len < sizeof(struct bssgp_ud_hdr)) |
| 1823 | return 0; |
| 1824 | budh = (struct bssgp_ud_hdr *)bssgp; |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 1825 | bgph = NULL; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 1826 | data = budh->data; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1827 | data_len = bssgp_len - sizeof(*budh); |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 1828 | } else { |
| 1829 | data = bgph->data; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1830 | data_len = bssgp_len - sizeof(*bgph); |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 1831 | } |
| 1832 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1833 | if (bssgp_tlv_parse(tp, data, data_len) < 0) |
| 1834 | return 0; |
| 1835 | |
| 1836 | parse_ctx->pdu_type = pdu_type; |
| 1837 | parse_ctx->bud_hdr = budh; |
| 1838 | parse_ctx->bgp_hdr = bgph; |
| 1839 | parse_ctx->bssgp_data = data; |
| 1840 | parse_ctx->bssgp_data_len = data_len; |
| 1841 | |
| 1842 | if (budh) |
| 1843 | parse_ctx->tlli_enc = (uint8_t *)&budh->tlli; |
| 1844 | |
| 1845 | if (TLVP_PRESENT(tp, BSSGP_IE_ROUTEING_AREA)) |
| 1846 | parse_ctx->bssgp_raid_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA); |
| 1847 | |
| 1848 | if (TLVP_PRESENT(tp, BSSGP_IE_CELL_ID)) |
| 1849 | parse_ctx->bssgp_raid_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_CELL_ID); |
| 1850 | |
| 1851 | if (TLVP_PRESENT(tp, BSSGP_IE_IMSI)) { |
| 1852 | parse_ctx->imsi = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_IMSI); |
| 1853 | parse_ctx->imsi_len = TLVP_LEN(tp, BSSGP_IE_IMSI); |
| 1854 | } |
| 1855 | |
Jacob Erlbeck | e37487e | 2014-08-18 17:01:32 +0200 | [diff] [blame] | 1856 | /* TODO: This is TLLI old, don't confuse with TLLI current, add |
| 1857 | * and use tlli_old_enc instead */ |
| 1858 | if (0 && TLVP_PRESENT(tp, BSSGP_IE_TLLI)) |
Jacob Erlbeck | 690768a | 2014-08-06 15:16:45 +0200 | [diff] [blame] | 1859 | parse_ctx->tlli_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_TLLI); |
| 1860 | |
| 1861 | if (TLVP_PRESENT(tp, BSSGP_IE_TMSI) && pdu_type == BSSGP_PDUT_PAGING_PS) |
| 1862 | parse_ctx->ptmsi_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_TMSI); |
| 1863 | |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1864 | if (TLVP_PRESENT(tp, BSSGP_IE_LLC_PDU)) { |
| 1865 | uint8_t *llc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_LLC_PDU); |
| 1866 | size_t llc_len = TLVP_LEN(tp, BSSGP_IE_LLC_PDU); |
| 1867 | |
| 1868 | rc = gbprox_parse_llc(llc, llc_len, parse_ctx); |
| 1869 | if (!rc) |
| 1870 | return 0; |
| 1871 | |
| 1872 | parse_ctx->llc = llc; |
| 1873 | parse_ctx->llc_len = llc_len; |
| 1874 | } |
| 1875 | |
| 1876 | if (parse_ctx->tlli_enc) { |
| 1877 | uint32_t tmp_tlli; |
| 1878 | memcpy(&tmp_tlli, parse_ctx->tlli_enc, sizeof(tmp_tlli)); |
| 1879 | parse_ctx->tlli = ntohl(tmp_tlli); |
| 1880 | } |
| 1881 | |
| 1882 | return 1; |
| 1883 | } |
| 1884 | |
| 1885 | /* patch BSSGP message to use core_mcc/mnc on the SGSN side */ |
Jacob Erlbeck | c812882 | 2014-08-07 16:07:24 +0200 | [diff] [blame] | 1886 | static void gbprox_patch_bssgp(struct msgb *msg, uint8_t *bssgp, size_t bssgp_len, |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 1887 | struct gbproxy_peer *peer, |
| 1888 | struct gbproxy_tlli_info *tlli_info, int *len_change, |
Jacob Erlbeck | c812882 | 2014-08-07 16:07:24 +0200 | [diff] [blame] | 1889 | struct gbproxy_parse_context *parse_ctx) |
| 1890 | __attribute__((nonnull)); |
| 1891 | static void gbprox_patch_bssgp(struct msgb *msg, uint8_t *bssgp, size_t bssgp_len, |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 1892 | struct gbproxy_peer *peer, |
| 1893 | struct gbproxy_tlli_info *tlli_info, int *len_change, |
Jacob Erlbeck | c812882 | 2014-08-07 16:07:24 +0200 | [diff] [blame] | 1894 | struct gbproxy_parse_context *parse_ctx) |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1895 | { |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1896 | const char *err_info = NULL; |
| 1897 | int err_ctr = -1; |
Jacob Erlbeck | c812882 | 2014-08-07 16:07:24 +0200 | [diff] [blame] | 1898 | |
| 1899 | if (!patching_is_enabled(peer, GBPROX_PATCH_BSSGP)) |
| 1900 | return; |
| 1901 | |
| 1902 | if (parse_ctx->bssgp_raid_enc) |
| 1903 | gbprox_patch_raid(parse_ctx->bssgp_raid_enc, peer, |
| 1904 | parse_ctx->to_bss, "BSSGP"); |
| 1905 | |
| 1906 | if (!patching_is_enabled(peer, GBPROX_PATCH_LLC_ATTACH_REQ)) |
| 1907 | return; |
| 1908 | |
| 1909 | if (parse_ctx->need_decryption && |
| 1910 | patching_is_required(peer, GBPROX_PATCH_LLC_ATTACH)) { |
| 1911 | /* Patching LLC messages has been requested |
| 1912 | * explicitly, but the message (including the |
| 1913 | * type) is encrypted, so we possibly fail to |
| 1914 | * patch the LLC part of the message. */ |
| 1915 | err_ctr = GBPROX_PEER_CTR_PATCH_CRYPT_ERR; |
| 1916 | err_info = "GMM message is encrypted"; |
| 1917 | goto patch_error; |
| 1918 | } |
| 1919 | |
Jacob Erlbeck | 03ca10e | 2014-08-18 17:23:01 +0200 | [diff] [blame] | 1920 | if (parse_ctx->tlli_enc && tlli_info) { |
| 1921 | uint32_t tlli = gbprox_map_tlli(parse_ctx->tlli, |
| 1922 | tlli_info, parse_ctx->to_bss); |
| 1923 | |
| 1924 | if (tlli) { |
| 1925 | gbprox_patch_tlli(parse_ctx->tlli_enc, peer, tlli, |
| 1926 | parse_ctx->to_bss, "TLLI"); |
| 1927 | parse_ctx->tlli = tlli; |
| 1928 | } else if (parse_ctx->to_bss) { |
| 1929 | /* Happens with unknown (not cached) TLLI coming from |
| 1930 | * the SGSN */ |
| 1931 | /* TODO: What shall be done with the message in this case? */ |
| 1932 | err_ctr = GBPROX_PEER_CTR_TLLI_UNKNOWN; |
| 1933 | err_info = "TLLI sent by the SGSN is unknown"; |
| 1934 | goto patch_error; |
| 1935 | } else { |
| 1936 | /* Internal error */ |
| 1937 | err_ctr = GBPROX_PEER_CTR_PATCH_ERR; |
| 1938 | err_info = "Replacement TLLI is 0"; |
| 1939 | goto patch_error; |
| 1940 | } |
| 1941 | } |
| 1942 | |
Jacob Erlbeck | c812882 | 2014-08-07 16:07:24 +0200 | [diff] [blame] | 1943 | if (parse_ctx->llc) { |
| 1944 | uint8_t *llc = parse_ctx->llc; |
| 1945 | size_t llc_len = parse_ctx->llc_len; |
| 1946 | int llc_len_change = 0; |
| 1947 | |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 1948 | gbprox_patch_llc(msg, llc, llc_len, peer, tlli_info, |
| 1949 | &llc_len_change, parse_ctx); |
Jacob Erlbeck | c812882 | 2014-08-07 16:07:24 +0200 | [diff] [blame] | 1950 | /* Note that the APN might have been resized here, but no |
| 1951 | * pointer int the parse_ctx will refer to an adress after the |
| 1952 | * APN. So it's possible to patch first and do the TLLI |
| 1953 | * handling afterwards. */ |
| 1954 | |
| 1955 | if (llc_len_change) { |
| 1956 | llc_len += llc_len_change; |
| 1957 | |
| 1958 | /* Fix LLC IE len */ |
| 1959 | /* TODO: This is a kludge, but the a pointer to the |
| 1960 | * start of the IE is not available here */ |
| 1961 | if (llc[-2] == BSSGP_IE_LLC_PDU && llc[-1] & 0x80) { |
| 1962 | /* most probably a one byte length */ |
| 1963 | if (llc_len > 127) { |
| 1964 | err_info = "Cannot increase size"; |
| 1965 | err_ctr = GBPROX_PEER_CTR_PATCH_ERR; |
| 1966 | goto patch_error; |
| 1967 | } |
| 1968 | llc[-1] = llc_len | 0x80; |
| 1969 | } else { |
| 1970 | llc[-2] = (llc_len >> 8) & 0x7f; |
| 1971 | llc[-1] = llc_len & 0xff; |
| 1972 | } |
| 1973 | *len_change += llc_len_change; |
| 1974 | } |
| 1975 | /* Note that the tp struct might contain invalid pointers here |
| 1976 | * if the LLC field has changed its size */ |
| 1977 | parse_ctx->llc_len = llc_len; |
| 1978 | } |
| 1979 | return; |
| 1980 | |
| 1981 | patch_error: |
| 1982 | OSMO_ASSERT(err_ctr >= 0); |
| 1983 | rate_ctr_inc(&peer->ctrg->ctr[err_ctr]); |
| 1984 | LOGP(DGPRS, LOGL_ERROR, |
Jacob Erlbeck | 643d522 | 2014-08-18 17:26:04 +0200 | [diff] [blame^] | 1985 | "NSEI=%u(%s) failed to patch BSSGP message as requested: %s.\n", |
| 1986 | msgb_nsei(msg), parse_ctx->to_bss ? "SGSN" : "BSS", |
| 1987 | err_info); |
Jacob Erlbeck | c812882 | 2014-08-07 16:07:24 +0200 | [diff] [blame] | 1988 | } |
| 1989 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1990 | /* patch BSSGP message */ |
| 1991 | static void gbprox_process_bssgp_ul(struct gbproxy_config *cfg, |
| 1992 | struct msgb *msg, |
| 1993 | struct gbproxy_peer *peer) |
Jacob Erlbeck | c812882 | 2014-08-07 16:07:24 +0200 | [diff] [blame] | 1994 | { |
| 1995 | struct gbproxy_parse_context parse_ctx = {0}; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 1996 | int rc; |
Jacob Erlbeck | c812882 | 2014-08-07 16:07:24 +0200 | [diff] [blame] | 1997 | int len_change = 0; |
Jacob Erlbeck | 7b821d0 | 2014-08-08 08:37:37 +0200 | [diff] [blame] | 1998 | time_t now; |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 1999 | struct gbproxy_tlli_info *tlli_info = NULL; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 2000 | |
| 2001 | if (!cfg->core_mcc && !cfg->core_mnc && !cfg->core_apn) |
| 2002 | return; |
| 2003 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 2004 | parse_ctx.to_bss = 0; |
| 2005 | |
| 2006 | /* Parse BSSGP/LLC */ |
| 2007 | rc = gbprox_parse_bssgp(msgb_bssgph(msg), msgb_bssgp_len(msg), |
| 2008 | &parse_ctx); |
| 2009 | |
| 2010 | if (!rc) { |
| 2011 | if (!parse_ctx.need_decryption) { |
| 2012 | LOGP(DGPRS, LOGL_ERROR, |
Jacob Erlbeck | 643d522 | 2014-08-18 17:26:04 +0200 | [diff] [blame^] | 2013 | "NSEI=%u(BSS) patching: " |
| 2014 | "failed to parse BSSGP/GMM message\n", |
| 2015 | msgb_nsei(msg)); |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 2016 | return; |
| 2017 | } |
| 2018 | } |
| 2019 | |
| 2020 | /* Get peer */ |
| 2021 | if (!peer && msgb_bvci(msg) >= 2) |
| 2022 | peer = peer_by_bvci(cfg, msgb_bvci(msg)); |
| 2023 | |
| 2024 | if (!peer) |
| 2025 | peer = gbprox_peer_by_nsei(cfg, msgb_nsei(msg)); |
| 2026 | |
| 2027 | if (!peer) |
| 2028 | peer = peer_by_bssgp_tlv(cfg, &parse_ctx.bssgp_tp); |
| 2029 | |
| 2030 | if (!peer) { |
| 2031 | LOGP(DLLC, LOGL_INFO, |
| 2032 | "NSEI=%d(BSS) patching: didn't find peer for message, " |
| 2033 | "PDU %d\n", |
| 2034 | msgb_nsei(msg), parse_ctx.pdu_type); |
| 2035 | /* Increment counter */ |
| 2036 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_PATCH_PEER_ERR]); |
| 2037 | return; |
| 2038 | } |
| 2039 | |
| 2040 | now = time(NULL); |
| 2041 | |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 2042 | if (parse_ctx.bssgp_raid_enc && parse_ctx.old_raid_enc && |
| 2043 | memcmp(parse_ctx.bssgp_raid_enc, parse_ctx.old_raid_enc, 6) == 0) |
| 2044 | parse_ctx.old_raid_matches = 1; |
| 2045 | |
| 2046 | gbprox_update_current_raid(parse_ctx.bssgp_raid_enc, peer, |
| 2047 | parse_ctx.llc_msg_name); |
| 2048 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 2049 | tlli_info = gbprox_update_state_ul(peer, now, &parse_ctx); |
| 2050 | |
| 2051 | gbprox_patch_bssgp(msg, msgb_bssgph(msg), msgb_bssgp_len(msg), |
| 2052 | peer, tlli_info, &len_change, &parse_ctx); |
| 2053 | |
| 2054 | gbprox_update_state_after(peer, tlli_info, now, &parse_ctx); |
| 2055 | |
| 2056 | return; |
| 2057 | } |
| 2058 | |
| 2059 | /* patch BSSGP message to use core_mcc/mnc on the SGSN side */ |
| 2060 | static void gbprox_process_bssgp_dl(struct gbproxy_config *cfg, |
| 2061 | struct msgb *msg, |
| 2062 | struct gbproxy_peer *peer) |
| 2063 | { |
| 2064 | struct gbproxy_parse_context parse_ctx = {0}; |
| 2065 | int rc; |
| 2066 | int len_change = 0; |
| 2067 | time_t now; |
| 2068 | struct gbproxy_tlli_info *tlli_info = NULL; |
| 2069 | |
| 2070 | parse_ctx.to_bss = 1; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 2071 | |
Jacob Erlbeck | c812882 | 2014-08-07 16:07:24 +0200 | [diff] [blame] | 2072 | rc = gbprox_parse_bssgp(msgb_bssgph(msg), msgb_bssgp_len(msg), |
| 2073 | &parse_ctx); |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 2074 | |
| 2075 | if (!rc) { |
| 2076 | if (!parse_ctx.need_decryption) { |
| 2077 | LOGP(DGPRS, LOGL_ERROR, |
Jacob Erlbeck | 643d522 | 2014-08-18 17:26:04 +0200 | [diff] [blame^] | 2078 | "NSEI=%u(SGSN) patching: " |
| 2079 | "failed to parse BSSGP/GMM message\n", |
| 2080 | msgb_nsei(msg)); |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 2081 | return; |
| 2082 | } |
| 2083 | } |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 2084 | |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 2085 | if (!peer && msgb_bvci(msg) >= 2) |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2086 | peer = peer_by_bvci(cfg, msgb_bvci(msg)); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 2087 | |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 2088 | if (!peer) |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 2089 | peer = peer_by_bssgp_tlv(cfg, &parse_ctx.bssgp_tp); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 2090 | |
| 2091 | if (!peer) { |
| 2092 | LOGP(DLLC, LOGL_INFO, |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 2093 | "NSEI=%d(SGSN) patching: didn't find peer for message, " |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 2094 | "PDU %d\n", |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 2095 | msgb_nsei(msg), parse_ctx.pdu_type); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 2096 | /* Increment counter */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2097 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_PATCH_PEER_ERR]); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 2098 | return; |
| 2099 | } |
| 2100 | |
Jacob Erlbeck | 7b821d0 | 2014-08-08 08:37:37 +0200 | [diff] [blame] | 2101 | now = time(NULL); |
| 2102 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 2103 | tlli_info = gbprox_update_state_dl(peer, now, &parse_ctx); |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 2104 | |
Jacob Erlbeck | c812882 | 2014-08-07 16:07:24 +0200 | [diff] [blame] | 2105 | gbprox_patch_bssgp(msg, msgb_bssgph(msg), msgb_bssgp_len(msg), |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 2106 | peer, tlli_info, &len_change, &parse_ctx); |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 2107 | |
Jacob Erlbeck | 5e68ecf | 2014-08-07 20:18:47 +0200 | [diff] [blame] | 2108 | gbprox_update_state_after(peer, tlli_info, now, &parse_ctx); |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 2109 | |
Jacob Erlbeck | 03551e5 | 2014-06-27 19:56:05 +0200 | [diff] [blame] | 2110 | return; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 2111 | } |
| 2112 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2113 | /* feed a message down the NS-VC associated with the specified peer */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2114 | 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] | 2115 | struct gbproxy_peer *peer, uint16_t ns_bvci) |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 2116 | { |
Harald Welte | 39d0bb5 | 2010-05-12 18:10:25 +0000 | [diff] [blame] | 2117 | /* create a copy of the message so the old one can |
| 2118 | * be free()d safely when we return from gbprox_rcvmsg() */ |
Holger Hans Peter Freyther | 7127b02 | 2014-08-04 11:52:52 +0200 | [diff] [blame] | 2119 | struct msgb *msg = gprs_msgb_copy(old_msg, "msgb_relay2sgsn"); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2120 | int rc; |
Harald Welte | 39d0bb5 | 2010-05-12 18:10:25 +0000 | [diff] [blame] | 2121 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 2122 | gbprox_process_bssgp_ul(cfg, msg, peer); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 2123 | |
Harald Welte | e9ea269 | 2010-05-11 20:20:13 +0200 | [diff] [blame] | 2124 | DEBUGP(DGPRS, "NSEI=%u proxying BTS->SGSN (NS_BVCI=%u, NSEI=%u)\n", |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2125 | msgb_nsei(msg), ns_bvci, cfg->nsip_sgsn_nsei); |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 2126 | |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 2127 | msgb_bvci(msg) = ns_bvci; |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2128 | msgb_nsei(msg) = cfg->nsip_sgsn_nsei; |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 2129 | |
Harald Welte | 69619e3 | 2010-05-03 19:05:10 +0200 | [diff] [blame] | 2130 | strip_ns_hdr(msg); |
| 2131 | |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2132 | rc = gprs_ns_sendmsg(bssgp_nsi, msg); |
| 2133 | if (rc < 0) |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2134 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_TX_ERR_SGSN]); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2135 | |
| 2136 | return rc; |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 2137 | } |
| 2138 | |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 2139 | /* 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] | 2140 | static int gbprox_relay2peer(struct msgb *old_msg, struct gbproxy_peer *peer, |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2141 | uint16_t ns_bvci) |
| 2142 | { |
Harald Welte | 39d0bb5 | 2010-05-12 18:10:25 +0000 | [diff] [blame] | 2143 | /* create a copy of the message so the old one can |
| 2144 | * be free()d safely when we return from gbprox_rcvmsg() */ |
Holger Hans Peter Freyther | 7127b02 | 2014-08-04 11:52:52 +0200 | [diff] [blame] | 2145 | struct msgb *msg = gprs_msgb_copy(old_msg, "msgb_relay2peer"); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2146 | int rc; |
Harald Welte | 39d0bb5 | 2010-05-12 18:10:25 +0000 | [diff] [blame] | 2147 | |
Harald Welte | 0ab535b | 2010-05-13 10:34:56 +0200 | [diff] [blame] | 2148 | 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] | 2149 | msgb_nsei(msg), ns_bvci, peer->nsei); |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 2150 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2151 | msgb_bvci(msg) = ns_bvci; |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2152 | msgb_nsei(msg) = peer->nsei; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2153 | |
Harald Welte | 0ab535b | 2010-05-13 10:34:56 +0200 | [diff] [blame] | 2154 | /* 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] | 2155 | strip_ns_hdr(msg); |
| 2156 | |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2157 | rc = gprs_ns_sendmsg(bssgp_nsi, msg); |
| 2158 | if (rc < 0) |
| 2159 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_TX_ERR]); |
| 2160 | |
| 2161 | return rc; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2162 | } |
| 2163 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2164 | 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] | 2165 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 2166 | struct gbproxy_peer *peer; |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 2167 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2168 | peer = peer_by_bvci(cfg, ptp_bvci); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 2169 | if (!peer) { |
| 2170 | LOGP(DGPRS, LOGL_ERROR, "BVCI=%u: Cannot find BSS\n", |
| 2171 | ptp_bvci); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2172 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 2173 | return -ENOENT; |
| 2174 | } |
| 2175 | |
| 2176 | switch (pdu_type) { |
| 2177 | case BSSGP_PDUT_BVC_BLOCK_ACK: |
| 2178 | peer->blocked = 1; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2179 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_BLOCKED]); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 2180 | break; |
| 2181 | case BSSGP_PDUT_BVC_UNBLOCK_ACK: |
| 2182 | peer->blocked = 0; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2183 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_UNBLOCKED]); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 2184 | break; |
| 2185 | default: |
| 2186 | break; |
| 2187 | } |
| 2188 | return 0; |
| 2189 | } |
| 2190 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2191 | /* Send a message to a peer identified by ptp_bvci but using ns_bvci |
| 2192 | * in the NS hdr */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2193 | 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] | 2194 | uint16_t ns_bvci) |
| 2195 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 2196 | struct gbproxy_peer *peer; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2197 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2198 | peer = peer_by_bvci(cfg, ptp_bvci); |
Harald Welte | 1c77c6e | 2010-05-03 21:37:11 +0200 | [diff] [blame] | 2199 | if (!peer) { |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 2200 | LOGP(DGPRS, LOGL_ERROR, "BVCI=%u: Cannot find BSS\n", |
Harald Welte | 1c77c6e | 2010-05-03 21:37:11 +0200 | [diff] [blame] | 2201 | ptp_bvci); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2202 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2203 | return -ENOENT; |
Harald Welte | 1c77c6e | 2010-05-03 21:37:11 +0200 | [diff] [blame] | 2204 | } |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2205 | |
Harald Welte | 69619e3 | 2010-05-03 19:05:10 +0200 | [diff] [blame] | 2206 | return gbprox_relay2peer(msg, peer, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2207 | } |
| 2208 | |
Harald Welte | b1fd902 | 2012-06-17 12:16:31 +0800 | [diff] [blame] | 2209 | int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) |
| 2210 | { |
| 2211 | return 0; |
| 2212 | } |
| 2213 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2214 | /* Receive an incoming signalling message from a BSS-side NS-VC */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2215 | static int gbprox_rx_sig_from_bss(struct gbproxy_config *cfg, |
| 2216 | struct msgb *msg, uint16_t nsei, |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2217 | uint16_t ns_bvci) |
| 2218 | { |
Harald Welte | ca3620a | 2010-05-03 16:30:59 +0200 | [diff] [blame] | 2219 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2220 | struct tlv_parsed tp; |
| 2221 | uint8_t pdu_type = bgph->pdu_type; |
Harald Welte | ca3620a | 2010-05-03 16:30:59 +0200 | [diff] [blame] | 2222 | int data_len = msgb_bssgp_len(msg) - sizeof(*bgph); |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 2223 | struct gbproxy_peer *from_peer = NULL; |
Harald Welte | 70f38d2 | 2010-05-01 12:10:57 +0200 | [diff] [blame] | 2224 | struct gprs_ra_id raid; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2225 | |
Harald Welte | c471d3d | 2011-02-06 17:13:12 +0100 | [diff] [blame] | 2226 | if (ns_bvci != 0 && ns_bvci != 1) { |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 2227 | LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u BVCI=%u is not signalling\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2228 | nsei, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2229 | return -EINVAL; |
| 2230 | } |
| 2231 | |
| 2232 | /* we actually should never see those two for BVCI == 0, but double-check |
| 2233 | * just to make sure */ |
| 2234 | if (pdu_type == BSSGP_PDUT_UL_UNITDATA || |
| 2235 | pdu_type == BSSGP_PDUT_DL_UNITDATA) { |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 2236 | LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u UNITDATA not allowed in " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2237 | "signalling\n", nsei); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2238 | return -EINVAL; |
| 2239 | } |
| 2240 | |
| 2241 | bssgp_tlv_parse(&tp, bgph->data, data_len); |
| 2242 | |
| 2243 | switch (pdu_type) { |
| 2244 | case BSSGP_PDUT_SUSPEND: |
| 2245 | case BSSGP_PDUT_RESUME: |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 2246 | /* We implement RAI snooping during SUSPEND/RESUME, since it |
| 2247 | * establishes a relationsip between BVCI/peer and the routeing |
| 2248 | * area identification. The snooped information is then used |
| 2249 | * for routing the {SUSPEND,RESUME}_[N]ACK back to the correct |
| 2250 | * BSSGP */ |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2251 | if (!TLVP_PRESENT(&tp, BSSGP_IE_ROUTEING_AREA)) |
| 2252 | goto err_mand_ie; |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2253 | from_peer = gbprox_peer_by_nsei(cfg, nsei); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2254 | if (!from_peer) |
| 2255 | goto err_no_peer; |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 2256 | memcpy(from_peer->ra, TLVP_VAL(&tp, BSSGP_IE_ROUTEING_AREA), |
| 2257 | sizeof(from_peer->ra)); |
Harald Welte | 7fc9822 | 2010-05-11 10:15:42 +0200 | [diff] [blame] | 2258 | gsm48_parse_ra(&raid, from_peer->ra); |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 2259 | LOGP(DGPRS, LOGL_INFO, "NSEI=%u BSSGP SUSPEND/RESUME " |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 2260 | "RAI snooping: RAI %u-%u-%u-%u behind BVCI=%u\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2261 | nsei, raid.mcc, raid.mnc, raid.lac, |
| 2262 | raid.rac , from_peer->bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2263 | /* FIXME: This only supports one BSS per RA */ |
| 2264 | break; |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 2265 | case BSSGP_PDUT_BVC_RESET: |
| 2266 | /* If we receive a BVC reset on the signalling endpoint, we |
| 2267 | * don't want the SGSN to reset, as the signalling endpoint |
| 2268 | * is common for all point-to-point BVCs (and thus all BTS) */ |
| 2269 | if (TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) { |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 2270 | uint16_t bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
Harald Welte | 72953b8 | 2010-05-12 00:20:41 +0200 | [diff] [blame] | 2271 | LOGP(DGPRS, LOGL_INFO, "NSEI=%u Rx BVC RESET (BVCI=%u)\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2272 | nsei, bvci); |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 2273 | if (bvci == 0) { |
| 2274 | /* FIXME: only do this if SGSN is alive! */ |
Harald Welte | e9ea269 | 2010-05-11 20:20:13 +0200 | [diff] [blame] | 2275 | LOGP(DGPRS, LOGL_INFO, "NSEI=%u Tx fake " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2276 | "BVC RESET ACK of BVCI=0\n", nsei); |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 2277 | return bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_RESET_ACK, |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2278 | nsei, 0, ns_bvci); |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 2279 | } |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2280 | from_peer = peer_by_bvci(cfg, bvci); |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 2281 | if (!from_peer) { |
Harald Welte | 1c77c6e | 2010-05-03 21:37:11 +0200 | [diff] [blame] | 2282 | /* if a PTP-BVC is reset, and we don't know that |
| 2283 | * PTP-BVCI yet, we should allocate a new peer */ |
| 2284 | LOGP(DGPRS, LOGL_INFO, "Allocationg new peer for " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2285 | "BVCI=%u via NSEI=%u\n", bvci, nsei); |
Holger Hans Peter Freyther | 0196c99 | 2014-08-04 17:10:08 +0200 | [diff] [blame] | 2286 | from_peer = gbproxy_peer_alloc(cfg, bvci); |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2287 | from_peer->nsei = nsei; |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 2288 | } |
Jacob Erlbeck | 64cb924 | 2013-10-24 12:48:56 +0200 | [diff] [blame] | 2289 | |
| 2290 | if (!check_peer_nsei(from_peer, nsei)) |
| 2291 | from_peer->nsei = nsei; |
| 2292 | |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 2293 | if (TLVP_PRESENT(&tp, BSSGP_IE_CELL_ID)) { |
| 2294 | struct gprs_ra_id raid; |
| 2295 | /* We have a Cell Identifier present in this |
| 2296 | * PDU, this means we can extend our local |
| 2297 | * state information about this particular cell |
| 2298 | * */ |
| 2299 | memcpy(from_peer->ra, |
| 2300 | TLVP_VAL(&tp, BSSGP_IE_CELL_ID), |
| 2301 | sizeof(from_peer->ra)); |
| 2302 | gsm48_parse_ra(&raid, from_peer->ra); |
| 2303 | LOGP(DGPRS, LOGL_INFO, "NSEI=%u/BVCI=%u " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2304 | "Cell ID %u-%u-%u-%u\n", nsei, |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 2305 | bvci, raid.mcc, raid.mnc, raid.lac, |
| 2306 | raid.rac); |
| 2307 | } |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 2308 | } |
| 2309 | break; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2310 | } |
| 2311 | |
Harald Welte | e9ea269 | 2010-05-11 20:20:13 +0200 | [diff] [blame] | 2312 | /* Normally, we can simply pass on all signalling messages from BSS to |
| 2313 | * SGSN */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2314 | return gbprox_relay2sgsn(cfg, msg, from_peer, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2315 | err_no_peer: |
Jacob Erlbeck | c5085f9 | 2013-10-18 13:04:48 +0200 | [diff] [blame] | 2316 | 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] | 2317 | nsei); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2318 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_NSEI]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2319 | return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2320 | err_mand_ie: |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2321 | LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(BSS) missing mandatory RA IE\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2322 | nsei); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2323 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_PROTO_ERR_BSS]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2324 | return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2325 | } |
| 2326 | |
| 2327 | /* Receive paging request from SGSN, we need to relay to proper BSS */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2328 | 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] | 2329 | uint32_t nsei, uint16_t ns_bvci) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2330 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 2331 | struct gbproxy_peer *peer = NULL; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2332 | int errctr = GBPROX_GLOB_CTR_PROTO_ERR_SGSN; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2333 | |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 2334 | LOGP(DGPRS, LOGL_INFO, "NSEI=%u(SGSN) BSSGP PAGING ", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2335 | nsei); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2336 | if (TLVP_PRESENT(tp, BSSGP_IE_BVCI)) { |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 2337 | uint16_t bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 2338 | LOGPC(DGPRS, LOGL_INFO, "routing by BVCI to peer BVCI=%u\n", |
| 2339 | bvci); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2340 | errctr = GBPROX_GLOB_CTR_OTHER_ERR; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2341 | } else if (TLVP_PRESENT(tp, BSSGP_IE_ROUTEING_AREA)) { |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2342 | peer = peer_by_rai(cfg, TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA)); |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 2343 | 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] | 2344 | peer ? peer->bvci : -1); |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 2345 | errctr = GBPROX_GLOB_CTR_INV_RAI; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2346 | } else if (TLVP_PRESENT(tp, BSSGP_IE_LOCATION_AREA)) { |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2347 | peer = peer_by_lai(cfg, TLVP_VAL(tp, BSSGP_IE_LOCATION_AREA)); |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 2348 | 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] | 2349 | peer ? peer->bvci : -1); |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 2350 | errctr = GBPROX_GLOB_CTR_INV_LAI; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2351 | } else |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 2352 | LOGPC(DGPRS, LOGL_INFO, "\n"); |
| 2353 | |
| 2354 | if (!peer) { |
| 2355 | LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) BSSGP PAGING: " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2356 | "unable to route, missing IE\n", nsei); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2357 | rate_ctr_inc(&cfg->ctrg->ctr[errctr]); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2358 | return -EINVAL; |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 2359 | } |
| 2360 | return gbprox_relay2peer(msg, peer, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2361 | } |
| 2362 | |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2363 | /* Receive an incoming BVC-RESET message from the SGSN */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2364 | static int rx_reset_from_sgsn(struct gbproxy_config *cfg, |
| 2365 | struct msgb *msg, struct tlv_parsed *tp, |
| 2366 | uint32_t nsei, uint16_t ns_bvci) |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2367 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 2368 | struct gbproxy_peer *peer; |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2369 | uint16_t ptp_bvci; |
| 2370 | |
| 2371 | if (!TLVP_PRESENT(tp, BSSGP_IE_BVCI)) { |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2372 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2373 | ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2374 | return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, |
| 2375 | NULL, msg); |
| 2376 | } |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 2377 | ptp_bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2378 | |
| 2379 | if (ptp_bvci >= 2) { |
| 2380 | /* A reset for a PTP BVC was received, forward it to its |
| 2381 | * respective peer */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2382 | peer = peer_by_bvci(cfg, ptp_bvci); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2383 | if (!peer) { |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 2384 | LOGP(DGPRS, LOGL_ERROR, "NSEI=%u BVCI=%u: Cannot find BSS\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2385 | nsei, ptp_bvci); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2386 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2387 | ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2388 | return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, |
| 2389 | NULL, msg); |
| 2390 | } |
| 2391 | return gbprox_relay2peer(msg, peer, ns_bvci); |
| 2392 | } |
| 2393 | |
| 2394 | /* A reset for the Signalling entity has been received |
| 2395 | * from the SGSN. As the signalling BVCI is shared |
| 2396 | * among all the BSS's that we multiplex, it needs to |
| 2397 | * be relayed */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2398 | llist_for_each_entry(peer, &cfg->bts_peers, list) |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2399 | gbprox_relay2peer(msg, peer, ns_bvci); |
| 2400 | |
| 2401 | return 0; |
| 2402 | } |
| 2403 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2404 | /* Receive an incoming signalling message from the SGSN-side NS-VC */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2405 | static int gbprox_rx_sig_from_sgsn(struct gbproxy_config *cfg, |
| 2406 | struct msgb *msg, uint32_t nsei, |
| 2407 | uint16_t ns_bvci) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2408 | { |
Harald Welte | ca3620a | 2010-05-03 16:30:59 +0200 | [diff] [blame] | 2409 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2410 | struct tlv_parsed tp; |
| 2411 | uint8_t pdu_type = bgph->pdu_type; |
Harald Welte | ca3620a | 2010-05-03 16:30:59 +0200 | [diff] [blame] | 2412 | int data_len = msgb_bssgp_len(msg) - sizeof(*bgph); |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 2413 | struct gbproxy_peer *peer; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2414 | uint16_t bvci; |
| 2415 | int rc = 0; |
| 2416 | |
Harald Welte | c471d3d | 2011-02-06 17:13:12 +0100 | [diff] [blame] | 2417 | if (ns_bvci != 0 && ns_bvci != 1) { |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 2418 | LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) BVCI=%u is not " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2419 | "signalling\n", nsei, ns_bvci); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2420 | /* FIXME: Send proper error message */ |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2421 | return -EINVAL; |
| 2422 | } |
| 2423 | |
| 2424 | /* we actually should never see those two for BVCI == 0, but double-check |
| 2425 | * just to make sure */ |
| 2426 | if (pdu_type == BSSGP_PDUT_UL_UNITDATA || |
| 2427 | pdu_type == BSSGP_PDUT_DL_UNITDATA) { |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 2428 | LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) UNITDATA not allowed in " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2429 | "signalling\n", nsei); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2430 | return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2431 | } |
| 2432 | |
| 2433 | rc = bssgp_tlv_parse(&tp, bgph->data, data_len); |
| 2434 | |
| 2435 | switch (pdu_type) { |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2436 | case BSSGP_PDUT_BVC_RESET: |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2437 | rc = rx_reset_from_sgsn(cfg, msg, &tp, nsei, ns_bvci); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2438 | break; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2439 | case BSSGP_PDUT_FLUSH_LL: |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2440 | case BSSGP_PDUT_BVC_RESET_ACK: |
| 2441 | /* simple case: BVCI IE is mandatory */ |
| 2442 | if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) |
| 2443 | goto err_mand_ie; |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 2444 | bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2445 | rc = gbprox_relay2bvci(cfg, msg, bvci, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2446 | break; |
| 2447 | case BSSGP_PDUT_PAGING_PS: |
| 2448 | case BSSGP_PDUT_PAGING_CS: |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 2449 | /* process the paging request (LAI/RAI lookup) */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2450 | rc = gbprox_rx_paging(cfg, msg, &tp, nsei, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2451 | break; |
| 2452 | case BSSGP_PDUT_STATUS: |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2453 | /* Some exception has occurred */ |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 2454 | LOGP(DGPRS, LOGL_NOTICE, |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2455 | "NSEI=%u(SGSN) BSSGP STATUS ", nsei); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2456 | if (!TLVP_PRESENT(&tp, BSSGP_IE_CAUSE)) { |
| 2457 | LOGPC(DGPRS, LOGL_NOTICE, "\n"); |
| 2458 | goto err_mand_ie; |
| 2459 | } |
| 2460 | LOGPC(DGPRS, LOGL_NOTICE, |
| 2461 | "cause=0x%02x(%s) ", *TLVP_VAL(&tp, BSSGP_IE_CAUSE), |
| 2462 | bssgp_cause_str(*TLVP_VAL(&tp, BSSGP_IE_CAUSE))); |
| 2463 | if (TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) { |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 2464 | uint16_t bvci = tlvp_val16_unal(&tp, BSSGP_IE_BVCI); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2465 | LOGPC(DGPRS, LOGL_NOTICE, |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 2466 | "BVCI=%u\n", ntohs(bvci)); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2467 | } else |
| 2468 | LOGPC(DGPRS, LOGL_NOTICE, "\n"); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2469 | break; |
| 2470 | /* those only exist in the SGSN -> BSS direction */ |
| 2471 | case BSSGP_PDUT_SUSPEND_ACK: |
| 2472 | case BSSGP_PDUT_SUSPEND_NACK: |
| 2473 | case BSSGP_PDUT_RESUME_ACK: |
| 2474 | case BSSGP_PDUT_RESUME_NACK: |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 2475 | /* RAI IE is mandatory */ |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2476 | if (!TLVP_PRESENT(&tp, BSSGP_IE_ROUTEING_AREA)) |
| 2477 | goto err_mand_ie; |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2478 | peer = peer_by_rai(cfg, TLVP_VAL(&tp, BSSGP_IE_ROUTEING_AREA)); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2479 | if (!peer) |
| 2480 | goto err_no_peer; |
Harald Welte | 69619e3 | 2010-05-03 19:05:10 +0200 | [diff] [blame] | 2481 | rc = gbprox_relay2peer(msg, peer, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2482 | break; |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 2483 | case BSSGP_PDUT_BVC_BLOCK_ACK: |
| 2484 | case BSSGP_PDUT_BVC_UNBLOCK_ACK: |
| 2485 | if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) |
| 2486 | goto err_mand_ie; |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 2487 | bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 2488 | if (bvci == 0) { |
| 2489 | LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) BSSGP " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2490 | "%sBLOCK_ACK for signalling BVCI ?!?\n", nsei, |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 2491 | pdu_type == BSSGP_PDUT_BVC_UNBLOCK_ACK ? "UN":""); |
| 2492 | /* should we send STATUS ? */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2493 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2494 | ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 2495 | } else { |
| 2496 | /* Mark BVC as (un)blocked */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2497 | block_unblock_peer(cfg, bvci, pdu_type); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 2498 | } |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2499 | rc = gbprox_relay2bvci(cfg, msg, bvci, ns_bvci); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 2500 | break; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2501 | case BSSGP_PDUT_SGSN_INVOKE_TRACE: |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 2502 | LOGP(DGPRS, LOGL_ERROR, |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2503 | "NSEI=%u(SGSN) BSSGP INVOKE TRACE not supported\n",nsei); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2504 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2505 | ctr[GBPROX_GLOB_CTR_NOT_SUPPORTED_SGSN]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2506 | rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2507 | break; |
| 2508 | default: |
Harald Welte | 72953b8 | 2010-05-12 00:20:41 +0200 | [diff] [blame] | 2509 | LOGP(DGPRS, LOGL_NOTICE, "BSSGP PDU type 0x%02x unknown\n", |
| 2510 | pdu_type); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2511 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2512 | ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2513 | rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2514 | break; |
| 2515 | } |
| 2516 | |
| 2517 | return rc; |
| 2518 | err_mand_ie: |
Harald Welte | 1c77c6e | 2010-05-03 21:37:11 +0200 | [diff] [blame] | 2519 | LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) missing mandatory IE\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2520 | nsei); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2521 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2522 | ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2523 | return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2524 | err_no_peer: |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 2525 | 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] | 2526 | nsei); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2527 | rate_ctr_inc(&cfg->ctrg-> ctr[GBPROX_GLOB_CTR_INV_RAI]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 2528 | return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2529 | } |
| 2530 | |
| 2531 | /* Main input function for Gb proxy */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2532 | int gbprox_rcvmsg(struct gbproxy_config *cfg, struct msgb *msg, uint16_t nsei, |
| 2533 | uint16_t ns_bvci, uint16_t nsvci) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2534 | { |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 2535 | int rc; |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 2536 | struct gbproxy_peer *peer; |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2537 | int remote_end_is_sgsn = nsei == cfg->nsip_sgsn_nsei; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2538 | |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 2539 | if (remote_end_is_sgsn) |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 2540 | gbprox_process_bssgp_dl(cfg, msg, NULL); |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 2541 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2542 | /* Only BVCI=0 messages need special treatment */ |
| 2543 | if (ns_bvci == 0 || ns_bvci == 1) { |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2544 | if (remote_end_is_sgsn) |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2545 | rc = gbprox_rx_sig_from_sgsn(cfg, msg, nsei, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2546 | else |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2547 | rc = gbprox_rx_sig_from_bss(cfg, msg, nsei, ns_bvci); |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 2548 | } else { |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2549 | peer = peer_by_bvci(cfg, ns_bvci); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2550 | |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 2551 | /* All other BVCI are PTP and thus can be simply forwarded */ |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2552 | if (!remote_end_is_sgsn) { |
| 2553 | if (peer) |
| 2554 | check_peer_nsei(peer, nsei); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2555 | return gbprox_relay2sgsn(cfg, msg, peer, ns_bvci); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2556 | } |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2557 | |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 2558 | /* else: SGSN -> BSS direction */ |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 2559 | if (!peer) { |
Jacob Erlbeck | f0f63a4 | 2013-10-18 22:12:17 +0200 | [diff] [blame] | 2560 | LOGP(DGPRS, LOGL_INFO, "Didn't find peer for " |
| 2561 | "BVCI=%u for message from NSVC=%u/NSEI=%u (SGSN)\n", |
| 2562 | ns_bvci, nsvci, nsei); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2563 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | f0f63a4 | 2013-10-18 22:12:17 +0200 | [diff] [blame] | 2564 | ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
| 2565 | return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, |
| 2566 | &ns_bvci, msg); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 2567 | } |
| 2568 | if (peer->blocked) { |
| 2569 | LOGP(DGPRS, LOGL_NOTICE, "Dropping PDU for " |
| 2570 | "blocked BVCI=%u via NSVC=%u/NSEI=%u\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2571 | ns_bvci, nsvci, nsei); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2572 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_DROPPED]); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 2573 | return bssgp_tx_status(BSSGP_CAUSE_BVCI_BLOCKED, NULL, msg); |
| 2574 | } |
| 2575 | rc = gbprox_relay2peer(msg, peer, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2576 | } |
| 2577 | |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 2578 | return rc; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 2579 | } |
Harald Welte | 85801d0 | 2010-05-11 05:49:43 +0200 | [diff] [blame] | 2580 | |
Harald Welte | 1ccbf44 | 2010-05-14 11:53:08 +0000 | [diff] [blame] | 2581 | int gbprox_reset_persistent_nsvcs(struct gprs_ns_inst *nsi) |
| 2582 | { |
| 2583 | struct gprs_nsvc *nsvc; |
| 2584 | |
| 2585 | llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) { |
| 2586 | if (!nsvc->persistent) |
| 2587 | continue; |
| 2588 | gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION); |
| 2589 | } |
| 2590 | return 0; |
| 2591 | } |
| 2592 | |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 2593 | /* Signal handler for signals from NS layer */ |
| 2594 | int gbprox_signal(unsigned int subsys, unsigned int signal, |
| 2595 | void *handler_data, void *signal_data) |
| 2596 | { |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2597 | struct gbproxy_config *cfg = handler_data; |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 2598 | struct ns_signal_data *nssd = signal_data; |
| 2599 | struct gprs_nsvc *nsvc = nssd->nsvc; |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 2600 | struct gbproxy_peer *peer; |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 2601 | |
Harald Welte | a6a20b4 | 2012-06-16 16:40:42 +0800 | [diff] [blame] | 2602 | if (subsys != SS_L_NS) |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 2603 | return 0; |
| 2604 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2605 | if (signal == S_NS_RESET && nsvc->nsei == cfg->nsip_sgsn_nsei) { |
Harald Welte | f69c059 | 2010-05-11 18:29:44 +0200 | [diff] [blame] | 2606 | /* We have received a NS-RESET from the NSEI and NSVC |
| 2607 | * of the SGSN. This might happen with SGSN that start |
| 2608 | * their own NS-RESET procedure without waiting for our |
| 2609 | * NS-RESET */ |
| 2610 | nsvc->remote_end_is_sgsn = 1; |
| 2611 | } |
| 2612 | |
Harald Welte | b778d2c | 2010-05-12 13:28:25 +0000 | [diff] [blame] | 2613 | if (signal == S_NS_ALIVE_EXP && nsvc->remote_end_is_sgsn) { |
| 2614 | LOGP(DGPRS, LOGL_NOTICE, "Tns alive expired too often, " |
| 2615 | "re-starting RESET procedure\n"); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2616 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 2617 | ctr[GBPROX_GLOB_CTR_RESTART_RESET_SGSN]); |
Harald Welte | e6599ee | 2012-06-17 12:25:53 +0800 | [diff] [blame] | 2618 | gprs_ns_nsip_connect(nsvc->nsi, &nsvc->ip.bts_addr, |
| 2619 | nsvc->nsei, nsvc->nsvci); |
Harald Welte | b778d2c | 2010-05-12 13:28:25 +0000 | [diff] [blame] | 2620 | } |
| 2621 | |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 2622 | if (!nsvc->remote_end_is_sgsn) { |
| 2623 | /* from BSS to SGSN */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2624 | peer = gbprox_peer_by_nsei(cfg, nsvc->nsei); |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 2625 | if (!peer) { |
| 2626 | LOGP(DGPRS, LOGL_NOTICE, "signal %u for unknown peer " |
| 2627 | "NSEI=%u/NSVCI=%u\n", signal, nsvc->nsei, |
| 2628 | nsvc->nsvci); |
| 2629 | return 0; |
| 2630 | } |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 2631 | switch (signal) { |
| 2632 | case S_NS_RESET: |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 2633 | case S_NS_BLOCK: |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 2634 | if (!peer->blocked) |
| 2635 | break; |
| 2636 | LOGP(DGPRS, LOGL_NOTICE, "Converting NS_RESET from " |
| 2637 | "NSEI=%u/NSVCI=%u into BSSGP_BVC_BLOCK to SGSN\n", |
| 2638 | nsvc->nsei, nsvc->nsvci); |
| 2639 | bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_BLOCK, nsvc->nsei, |
| 2640 | peer->bvci, 0); |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 2641 | break; |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 2642 | } |
| 2643 | } else { |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2644 | /* Forward this message to all NS-VC to BSS */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2645 | struct gprs_ns_inst *nsi = cfg->nsi; |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2646 | struct gprs_nsvc *next_nsvc; |
| 2647 | |
| 2648 | llist_for_each_entry(next_nsvc, &nsi->gprs_nsvcs, list) { |
| 2649 | if (next_nsvc->remote_end_is_sgsn) |
| 2650 | continue; |
| 2651 | |
| 2652 | /* Note that the following does not start the full |
| 2653 | * procedures including timer based retransmissions. */ |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 2654 | switch (signal) { |
| 2655 | case S_NS_RESET: |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2656 | gprs_ns_tx_reset(next_nsvc, nssd->cause); |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 2657 | break; |
| 2658 | case S_NS_BLOCK: |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2659 | gprs_ns_tx_block(next_nsvc, nssd->cause); |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 2660 | break; |
| 2661 | case S_NS_UNBLOCK: |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 2662 | gprs_ns_tx_unblock(next_nsvc); |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 2663 | break; |
| 2664 | } |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 2665 | } |
| 2666 | } |
| 2667 | return 0; |
| 2668 | } |
| 2669 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2670 | void gbprox_reset(struct gbproxy_config *cfg) |
Jacob Erlbeck | 72b401f | 2013-10-24 12:48:55 +0200 | [diff] [blame] | 2671 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 2672 | struct gbproxy_peer *peer, *tmp; |
Jacob Erlbeck | 72b401f | 2013-10-24 12:48:55 +0200 | [diff] [blame] | 2673 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2674 | 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] | 2675 | gbproxy_peer_free(peer); |
Jacob Erlbeck | 72b401f | 2013-10-24 12:48:55 +0200 | [diff] [blame] | 2676 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2677 | rate_ctr_group_free(cfg->ctrg); |
| 2678 | gbproxy_init_config(cfg); |
Jacob Erlbeck | 72b401f | 2013-10-24 12:48:55 +0200 | [diff] [blame] | 2679 | } |
| 2680 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2681 | 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] | 2682 | { |
| 2683 | int counter = 0; |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 2684 | struct gbproxy_peer *peer, *tmp; |
Jacob Erlbeck | 4211d79 | 2013-10-24 12:48:23 +0200 | [diff] [blame] | 2685 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 2686 | llist_for_each_entry_safe(peer, tmp, &cfg->bts_peers, list) { |
Jacob Erlbeck | 4211d79 | 2013-10-24 12:48:23 +0200 | [diff] [blame] | 2687 | if (peer->nsei != nsei) |
| 2688 | continue; |
| 2689 | if (bvci && peer->bvci != bvci) |
| 2690 | continue; |
| 2691 | |
Holger Hans Peter Freyther | 0196c99 | 2014-08-04 17:10:08 +0200 | [diff] [blame] | 2692 | gbproxy_peer_free(peer); |
Jacob Erlbeck | 4211d79 | 2013-10-24 12:48:23 +0200 | [diff] [blame] | 2693 | counter += 1; |
| 2694 | } |
| 2695 | |
| 2696 | return counter; |
| 2697 | } |
| 2698 | |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 2699 | int gbproxy_init_config(struct gbproxy_config *cfg) |
Jacob Erlbeck | 4211d79 | 2013-10-24 12:48:23 +0200 | [diff] [blame] | 2700 | { |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 2701 | INIT_LLIST_HEAD(&cfg->bts_peers); |
Holger Hans Peter Freyther | a7027a0 | 2014-08-04 11:19:56 +0200 | [diff] [blame] | 2702 | cfg->ctrg = rate_ctr_group_alloc(tall_bsc_ctx, &global_ctrg_desc, 0); |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 2703 | return 0; |
Jacob Erlbeck | 4211d79 | 2013-10-24 12:48:23 +0200 | [diff] [blame] | 2704 | } |