Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1 | /* NS-over-IP proxy */ |
| 2 | |
| 3 | /* (C) 2010 by Harald Welte <laforge@gnumonks.org> |
Holger Hans Peter Freyther | 90267a9 | 2013-10-23 11:24:17 +0200 | [diff] [blame] | 4 | * (C) 2010-2013 by On-Waves |
| 5 | * (C) 2013 by Holger Hans Peter Freyther |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 6 | * All Rights Reserved |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 9 | * it under the terms of the GNU Affero General Public License as published by |
| 10 | * the Free Software Foundation; either version 3 of the License, or |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 16 | * GNU Affero General Public License for more details. |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 17 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 18 | * You should have received a copy of the GNU Affero General Public License |
| 19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <unistd.h> |
| 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <string.h> |
| 27 | #include <getopt.h> |
| 28 | #include <errno.h> |
| 29 | #include <sys/fcntl.h> |
| 30 | #include <sys/stat.h> |
Harald Welte | 7fc9822 | 2010-05-11 10:15:42 +0200 | [diff] [blame] | 31 | #include <arpa/inet.h> |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 32 | #include <time.h> |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 33 | |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 34 | #include <osmocom/core/talloc.h> |
| 35 | #include <osmocom/core/select.h> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 36 | #include <osmocom/core/rate_ctr.h> |
| 37 | |
Harald Welte | ea34a4e | 2012-06-16 14:59:56 +0800 | [diff] [blame] | 38 | #include <osmocom/gprs/gprs_ns.h> |
| 39 | #include <osmocom/gprs/gprs_bssgp.h> |
| 40 | |
Jacob Erlbeck | 7c101d9 | 2014-06-06 18:49:23 +0200 | [diff] [blame] | 41 | #include <osmocom/gsm/gsm_utils.h> |
| 42 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 43 | #include <openbsc/signal.h> |
| 44 | #include <openbsc/debug.h> |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 45 | #include <openbsc/gprs_gb_parse.h> |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 46 | #include <openbsc/gb_proxy.h> |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 47 | |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 48 | #include <openbsc/gprs_llc.h> |
| 49 | #include <openbsc/gsm_04_08.h> |
| 50 | #include <openbsc/gsm_04_08_gprs.h> |
Holger Hans Peter Freyther | 7127b02 | 2014-08-04 11:52:52 +0200 | [diff] [blame] | 51 | #include <openbsc/gprs_utils.h> |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 52 | |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 53 | static const struct rate_ctr_desc global_ctr_description[] = { |
| 54 | { "inv-bvci", "Invalid BVC Identifier " }, |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 55 | { "inv-lai", "Invalid Location Area Identifier" }, |
| 56 | { "inv-rai", "Invalid Routing Area Identifier " }, |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 57 | { "inv-nsei", "No BVC established for NSEI " }, |
| 58 | { "proto-err.bss", "BSSGP protocol error (BSS )" }, |
| 59 | { "proto-err.sgsn", "BSSGP protocol error (SGSN)" }, |
| 60 | { "not-supp.bss", "Feature not supported (BSS )" }, |
| 61 | { "not-supp.sgsn", "Feature not supported (SGSN)" }, |
| 62 | { "restart.sgsn", "Restarted RESET procedure (SGSN)" }, |
| 63 | { "tx-err.sgsn", "NS Transmission error (SGSN)" }, |
| 64 | { "error", "Other error " }, |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 65 | { "mod-peer-err", "Patch error: no peer " }, |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 66 | }; |
| 67 | |
| 68 | static const struct rate_ctr_group_desc global_ctrg_desc = { |
| 69 | .group_name_prefix = "gbproxy.global", |
| 70 | .group_description = "GBProxy Global Statistics", |
| 71 | .num_ctr = ARRAY_SIZE(global_ctr_description), |
| 72 | .ctr_desc = global_ctr_description, |
| 73 | }; |
| 74 | |
Jacob Erlbeck | 5f4ef32 | 2014-08-22 17:10:01 +0200 | [diff] [blame] | 75 | static int gbprox_relay2peer(struct msgb *old_msg, struct gbproxy_peer *peer, |
| 76 | uint16_t ns_bvci); |
| 77 | static int gbprox_relay2sgsn(struct gbproxy_config *cfg, struct msgb *old_msg, |
Jacob Erlbeck | f4d60c8 | 2014-08-26 14:47:15 +0200 | [diff] [blame] | 78 | uint16_t ns_bvci, uint16_t sgsn_nsei); |
Jacob Erlbeck | 5f4ef32 | 2014-08-22 17:10:01 +0200 | [diff] [blame] | 79 | |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 80 | static int check_peer_nsei(struct gbproxy_peer *peer, uint16_t nsei) |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 81 | { |
| 82 | if (peer->nsei != nsei) { |
| 83 | LOGP(DGPRS, LOGL_NOTICE, "Peer entry doesn't match current NSEI " |
| 84 | "BVCI=%u via NSEI=%u (expected NSEI=%u)\n", |
| 85 | peer->bvci, nsei, peer->nsei); |
| 86 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_INV_NSEI]); |
Jacob Erlbeck | 64cb924 | 2013-10-24 12:48:56 +0200 | [diff] [blame] | 87 | return 0; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 88 | } |
| 89 | |
Jacob Erlbeck | 64cb924 | 2013-10-24 12:48:56 +0200 | [diff] [blame] | 90 | return 1; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 91 | } |
| 92 | |
Harald Welte | 69619e3 | 2010-05-03 19:05:10 +0200 | [diff] [blame] | 93 | /* strip off the NS header */ |
| 94 | static void strip_ns_hdr(struct msgb *msg) |
| 95 | { |
| 96 | int strip_len = msgb_bssgph(msg) - msg->data; |
| 97 | msgb_pull(msg, strip_len); |
| 98 | } |
| 99 | |
Jacob Erlbeck | 5f4ef32 | 2014-08-22 17:10:01 +0200 | [diff] [blame] | 100 | /* Transmit Chapter 9.2.10 Identity Request */ |
| 101 | static void gprs_put_identity_req(struct msgb *msg, uint8_t id_type) |
| 102 | { |
| 103 | struct gsm48_hdr *gh; |
| 104 | |
| 105 | id_type &= GSM_MI_TYPE_MASK; |
| 106 | |
| 107 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 108 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 109 | gh->msg_type = GSM48_MT_GMM_ID_REQ; |
| 110 | gh->data[0] = id_type; |
| 111 | } |
| 112 | |
| 113 | static void gprs_push_llc_ui(struct msgb *msg, |
| 114 | int is_uplink, unsigned sapi, unsigned nu) |
| 115 | { |
| 116 | const uint8_t e_bit = 0; |
| 117 | const uint8_t pm_bit = 1; |
| 118 | const uint8_t cr_bit = is_uplink ? 0 : 1; |
Jacob Erlbeck | 5f4ef32 | 2014-08-22 17:10:01 +0200 | [diff] [blame] | 119 | uint8_t *llc; |
| 120 | uint8_t *fcs_field; |
| 121 | uint32_t fcs; |
| 122 | |
| 123 | nu &= 0x01ff; /* 9 Bit */ |
| 124 | |
| 125 | llc = msgb_push(msg, 3); |
| 126 | llc[0] = (cr_bit << 6) | (sapi & 0x0f); |
| 127 | llc[1] = 0xc0 | (nu >> 6); /* UI frame */ |
| 128 | llc[2] = (nu << 2) | ((e_bit & 1) << 1) | (pm_bit & 1); |
| 129 | |
| 130 | fcs = gprs_llc_fcs(llc, msgb_length(msg)); |
| 131 | fcs_field = msgb_put(msg, 3); |
| 132 | fcs_field[0] = (uint8_t)(fcs >> 0); |
| 133 | fcs_field[1] = (uint8_t)(fcs >> 8); |
| 134 | fcs_field[2] = (uint8_t)(fcs >> 16); |
| 135 | } |
| 136 | |
| 137 | static void gprs_push_bssgp_dl_unitdata(struct msgb *msg, |
| 138 | uint32_t tlli) |
| 139 | { |
| 140 | struct bssgp_ud_hdr *budh; |
| 141 | uint8_t *llc = msgb_data(msg); |
| 142 | size_t llc_size = msgb_length(msg); |
| 143 | const size_t llc_ie_hdr_size = 3; |
| 144 | const uint8_t qos_profile[] = {0x00, 0x50, 0x20}; /* hard-coded */ |
| 145 | const uint8_t lifetime[] = {0x02, 0x58}; /* 6s hard-coded */ |
| 146 | |
| 147 | const size_t bssgp_overhead = sizeof(*budh) + |
| 148 | TVLV_GROSS_LEN(sizeof(lifetime)) + llc_ie_hdr_size; |
| 149 | uint8_t *ie; |
| 150 | uint32_t tlli_be = htonl(tlli); |
| 151 | |
| 152 | budh = (struct bssgp_ud_hdr *)msgb_push(msg, bssgp_overhead); |
| 153 | |
| 154 | budh->pdu_type = BSSGP_PDUT_DL_UNITDATA; |
| 155 | memcpy(&budh->tlli, &tlli_be, sizeof(budh->tlli)); |
| 156 | memcpy(&budh->qos_profile, qos_profile, sizeof(budh->qos_profile)); |
| 157 | |
| 158 | ie = budh->data; |
| 159 | tvlv_put(ie, BSSGP_IE_PDU_LIFETIME, sizeof(lifetime), lifetime); |
| 160 | ie += TVLV_GROSS_LEN(sizeof(lifetime)); |
| 161 | |
| 162 | /* Note: Add alignment before the LLC IE if inserting other IE */ |
| 163 | |
| 164 | *(ie++) = BSSGP_IE_LLC_PDU; |
| 165 | *(ie++) = llc_size / 256; |
| 166 | *(ie++) = llc_size % 256; |
| 167 | |
| 168 | OSMO_ASSERT(ie == llc); |
| 169 | |
| 170 | msgb_bssgph(msg) = (uint8_t *)budh; |
| 171 | msgb_tlli(msg) = tlli; |
| 172 | } |
| 173 | |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 174 | /* update peer according to the BSS message */ |
| 175 | static void gbprox_update_current_raid(uint8_t *raid_enc, |
| 176 | struct gbproxy_peer *peer, |
| 177 | const char *log_text) |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 178 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 179 | struct gbproxy_patch_state *state = &peer->patch_state; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 180 | const int old_local_mcc = state->local_mcc; |
| 181 | const int old_local_mnc = state->local_mnc; |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 182 | struct gprs_ra_id raid; |
| 183 | |
| 184 | if (!raid_enc) |
| 185 | return; |
| 186 | |
| 187 | gsm48_parse_ra(&raid, raid_enc); |
| 188 | |
| 189 | /* save source side MCC/MNC */ |
| 190 | if (!peer->cfg->core_mcc || raid.mcc == peer->cfg->core_mcc) { |
| 191 | state->local_mcc = 0; |
| 192 | } else { |
| 193 | state->local_mcc = raid.mcc; |
| 194 | } |
| 195 | |
| 196 | if (!peer->cfg->core_mnc || raid.mnc == peer->cfg->core_mnc) { |
| 197 | state->local_mnc = 0; |
| 198 | } else { |
| 199 | state->local_mnc = raid.mnc; |
| 200 | } |
| 201 | |
| 202 | if (old_local_mcc != state->local_mcc || |
| 203 | old_local_mnc != state->local_mnc) |
| 204 | LOGP(DGPRS, LOGL_NOTICE, |
| 205 | "Patching RAID %sactivated, msg: %s, " |
| 206 | "local: %d-%d, core: %d-%d\n", |
| 207 | state->local_mcc || state->local_mnc ? |
| 208 | "" : "de", |
| 209 | log_text, |
| 210 | state->local_mcc, state->local_mnc, |
| 211 | peer->cfg->core_mcc, peer->cfg->core_mnc); |
| 212 | } |
| 213 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 214 | uint32_t gbproxy_make_bss_ptmsi(struct gbproxy_peer *peer, |
| 215 | uint32_t sgsn_ptmsi) |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 216 | { |
Jacob Erlbeck | 0d37671 | 2014-08-11 19:12:24 +0200 | [diff] [blame] | 217 | uint32_t bss_ptmsi; |
| 218 | if (!peer->cfg->patch_ptmsi) { |
| 219 | bss_ptmsi = sgsn_ptmsi; |
| 220 | } else { |
| 221 | do { |
| 222 | bss_ptmsi = rand_r(&peer->cfg->bss_ptmsi_state); |
| 223 | bss_ptmsi = bss_ptmsi | 0xC0000000; |
| 224 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 225 | if (gbproxy_find_tlli_by_ptmsi(peer, bss_ptmsi)) |
Jacob Erlbeck | 0d37671 | 2014-08-11 19:12:24 +0200 | [diff] [blame] | 226 | bss_ptmsi = GSM_RESERVED_TMSI; |
| 227 | } while (bss_ptmsi == GSM_RESERVED_TMSI); |
| 228 | } |
| 229 | |
| 230 | return bss_ptmsi; |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 231 | } |
| 232 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 233 | uint32_t gbproxy_make_sgsn_tlli(struct gbproxy_peer *peer, |
| 234 | struct gbproxy_tlli_info *tlli_info, |
| 235 | uint32_t bss_tlli) |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 236 | { |
Jacob Erlbeck | 0d37671 | 2014-08-11 19:12:24 +0200 | [diff] [blame] | 237 | uint32_t sgsn_tlli; |
| 238 | if (!peer->cfg->patch_ptmsi) { |
| 239 | sgsn_tlli = bss_tlli; |
| 240 | } else if (tlli_info->sgsn_tlli.ptmsi != GSM_RESERVED_TMSI) { |
| 241 | sgsn_tlli = gprs_tmsi2tlli(tlli_info->sgsn_tlli.ptmsi, |
| 242 | TLLI_FOREIGN); |
| 243 | } else { |
| 244 | do { |
| 245 | /* create random TLLI, 0b01111xxx... */ |
| 246 | sgsn_tlli = rand_r(&peer->cfg->sgsn_tlli_state); |
| 247 | sgsn_tlli = (sgsn_tlli & 0x7fffffff) | 0x78000000; |
| 248 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 249 | if (gbproxy_find_tlli_by_sgsn_tlli(peer, sgsn_tlli)) |
Jacob Erlbeck | 0d37671 | 2014-08-11 19:12:24 +0200 | [diff] [blame] | 250 | sgsn_tlli = 0; |
| 251 | } while (!sgsn_tlli); |
| 252 | } |
| 253 | return sgsn_tlli; |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 254 | } |
| 255 | |
Jacob Erlbeck | 3159114 | 2014-09-03 11:59:48 +0200 | [diff] [blame] | 256 | /* Returns != 0 iff IMSI acquisition was in progress */ |
Jacob Erlbeck | 0b243a1 | 2014-09-11 10:30:21 +0200 | [diff] [blame^] | 257 | static int gbproxy_restart_imsi_acquisition(struct gbproxy_tlli_info* tlli_info) |
Jacob Erlbeck | 3159114 | 2014-09-03 11:59:48 +0200 | [diff] [blame] | 258 | { |
| 259 | int in_progress = 0; |
| 260 | if (!tlli_info) |
| 261 | return 0; |
| 262 | |
Jacob Erlbeck | 0b243a1 | 2014-09-11 10:30:21 +0200 | [diff] [blame^] | 263 | if (tlli_info->imsi_acq_pending) { |
Jacob Erlbeck | 3159114 | 2014-09-03 11:59:48 +0200 | [diff] [blame] | 264 | in_progress = 1; |
Jacob Erlbeck | 0b243a1 | 2014-09-11 10:30:21 +0200 | [diff] [blame^] | 265 | tlli_info->imsi_acq_retries += 1; |
| 266 | } |
Jacob Erlbeck | 3159114 | 2014-09-03 11:59:48 +0200 | [diff] [blame] | 267 | |
| 268 | gbproxy_tlli_info_discard_messages(tlli_info); |
| 269 | tlli_info->imsi_acq_pending = 0; |
| 270 | |
| 271 | return in_progress; |
| 272 | } |
| 273 | |
Jacob Erlbeck | 0b243a1 | 2014-09-11 10:30:21 +0200 | [diff] [blame^] | 274 | static void gbproxy_reset_imsi_acquisition(struct gbproxy_tlli_info* tlli_info) |
| 275 | { |
| 276 | gbproxy_restart_imsi_acquisition(tlli_info); |
| 277 | tlli_info->imsi_acq_retries = 0; |
| 278 | } |
| 279 | |
| 280 | static void gbproxy_flush_stored_messages(struct gbproxy_peer *peer, |
| 281 | struct msgb *msg, |
| 282 | uint16_t sgsn_nsei, |
| 283 | time_t now, |
| 284 | struct gbproxy_tlli_info* tlli_info, |
| 285 | struct gprs_gb_parse_context *parse_ctx) |
| 286 | { |
| 287 | int rc; |
| 288 | struct msgb *stored_msg; |
| 289 | /* Got identity response with IMSI, assuming the request had |
| 290 | * been generated by the gbproxy */ |
| 291 | |
| 292 | LOGP(DLLC, LOGL_DEBUG, |
| 293 | "NSEI=%d(BSS) IMSI acquisition succeeded, " |
| 294 | "flushing stored messages\n", |
| 295 | msgb_nsei(msg)); |
| 296 | |
| 297 | /* Patch and flush stored messages towards the SGSN */ |
| 298 | while ((stored_msg = msgb_dequeue(&tlli_info->stored_msgs))) { |
| 299 | struct gprs_gb_parse_context tmp_parse_ctx = {0}; |
| 300 | tmp_parse_ctx.to_bss = 0; |
| 301 | int len_change = 0; |
| 302 | |
| 303 | gprs_gb_parse_bssgp(msgb_bssgph(stored_msg), |
| 304 | msgb_bssgp_len(stored_msg), |
| 305 | &tmp_parse_ctx); |
| 306 | gbproxy_patch_bssgp(msg, msgb_bssgph(stored_msg), |
| 307 | msgb_bssgp_len(stored_msg), |
| 308 | peer, tlli_info, &len_change, |
| 309 | &tmp_parse_ctx); |
| 310 | |
| 311 | gbproxy_update_tlli_state_after(peer, tlli_info, now, |
| 312 | &tmp_parse_ctx); |
| 313 | |
| 314 | rc = gbprox_relay2sgsn(peer->cfg, stored_msg, |
| 315 | msgb_bvci(msg), sgsn_nsei); |
| 316 | |
| 317 | if (rc < 0) |
| 318 | LOGP(DLLC, LOGL_ERROR, |
| 319 | "NSEI=%d(BSS) failed to send stored message " |
| 320 | "(%s)\n", |
| 321 | msgb_nsei(msg), |
| 322 | parse_ctx->llc_msg_name ? |
| 323 | parse_ctx->llc_msg_name : "BSSGP"); |
| 324 | msgb_free(stored_msg); |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | static void gbproxy_acquire_imsi(struct gbproxy_peer *peer, |
| 329 | struct gbproxy_tlli_info* tlli_info, |
| 330 | uint16_t bvci) |
| 331 | { |
| 332 | struct msgb *idreq_msg; |
| 333 | |
| 334 | /* Send IDENT REQ */ |
| 335 | idreq_msg = gsm48_msgb_alloc(); |
| 336 | gprs_put_identity_req(idreq_msg, GSM_MI_TYPE_IMSI); |
| 337 | /* Workaround to avoid N(U) collisions and to enable a restart |
| 338 | * of the IMSI acquisition procedure. This will work unless the |
| 339 | * SGSN has an initial V(UT) within [256-32, 256+n_retries] |
| 340 | * (see GSM 04.64, 8.4.2). |
| 341 | * TODO: Check whether it is sensible to rely on this, it might |
| 342 | * be an issue when P-TMSI patching is _not_ enabled and the SGSN |
| 343 | * doesn't reset V(UT) after a detach. */ |
| 344 | gprs_push_llc_ui(idreq_msg, 0, GPRS_SAPI_GMM, |
| 345 | (tlli_info->imsi_acq_retries + 256) % 512); |
| 346 | gprs_push_bssgp_dl_unitdata(idreq_msg, tlli_info->tlli.current); |
| 347 | gbprox_relay2peer(idreq_msg, peer, bvci); |
| 348 | msgb_free(idreq_msg); |
| 349 | } |
| 350 | |
| 351 | |
| 352 | /* Return != 0 iff msg still needs to be processed */ |
| 353 | static int gbproxy_imsi_acquisition(struct gbproxy_peer *peer, |
| 354 | struct msgb *msg, |
| 355 | uint16_t sgsn_nsei, |
| 356 | time_t now, |
| 357 | struct gbproxy_tlli_info* tlli_info, |
| 358 | struct gprs_gb_parse_context *parse_ctx) |
| 359 | { |
| 360 | if (!tlli_info) |
| 361 | return 1; |
| 362 | |
| 363 | if (parse_ctx->g48_hdr && |
| 364 | parse_ctx->g48_hdr->msg_type == GSM48_MT_GMM_ATTACH_REQ) |
| 365 | { |
| 366 | if (gbproxy_restart_imsi_acquisition(tlli_info)) { |
| 367 | LOGP(DLLC, LOGL_INFO, |
| 368 | "NSEI=%d(BSS) IMSI acquisition was in progress " |
| 369 | "when receiving an ATTACH_REQ.\n", |
| 370 | msgb_nsei(msg)); |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | if (tlli_info->imsi_acq_pending && parse_ctx->g48_hdr && |
| 375 | parse_ctx->g48_hdr->proto_discr == GSM48_PDISC_MM_GPRS && |
| 376 | parse_ctx->g48_hdr->msg_type == GSM48_MT_GMM_ID_RESP && |
| 377 | parse_ctx->imsi_len > 0) { |
| 378 | /* The IMSI is now available */ |
| 379 | gbproxy_flush_stored_messages(peer, msg, sgsn_nsei, now, |
| 380 | tlli_info, parse_ctx); |
| 381 | |
| 382 | gbproxy_reset_imsi_acquisition(tlli_info); |
| 383 | return 0; |
| 384 | } |
| 385 | |
| 386 | if (tlli_info->imsi_acq_pending) { |
| 387 | struct msgb *stored_msg; |
| 388 | |
| 389 | LOGP(DLLC, LOGL_DEBUG, |
| 390 | "NSEI=%d(BSS) IMSI acquisition in progess, " |
| 391 | "storing message (%s)\n", |
| 392 | msgb_nsei(msg), |
| 393 | parse_ctx->llc_msg_name ? parse_ctx->llc_msg_name : "BSSGP"); |
| 394 | |
| 395 | /* Enqueue unpatched messages */ |
| 396 | stored_msg = gprs_msgb_copy(msg, "process_bssgp_ul"); |
| 397 | msgb_enqueue(&tlli_info->stored_msgs, stored_msg); |
| 398 | |
| 399 | return 0; |
| 400 | } |
| 401 | |
| 402 | if (tlli_info->mi_data_len == 0) { |
| 403 | struct msgb *stored_msg = gprs_msgb_copy(msg, "process_bssgp_ul"); |
| 404 | |
| 405 | LOGP(DLLC, LOGL_DEBUG, |
| 406 | "NSEI=%d(BSS) IMSI is required but not available, " |
| 407 | "storing message (%s)\n", |
| 408 | msgb_nsei(msg), |
| 409 | parse_ctx->llc_msg_name ? parse_ctx->llc_msg_name : "BSSGP"); |
| 410 | |
| 411 | /* Enqueue message */ |
| 412 | msgb_enqueue(&tlli_info->stored_msgs, stored_msg); |
| 413 | |
| 414 | gbproxy_acquire_imsi(peer, tlli_info, msgb_bvci(msg)); |
| 415 | |
| 416 | tlli_info->imsi_acq_pending = 1; |
| 417 | |
| 418 | /* There is no explicit retransmission handling, the |
| 419 | * implementation relies on the MS doing proper retransmissions |
| 420 | * of the triggering message instead */ |
| 421 | |
| 422 | return 0; |
| 423 | } |
| 424 | |
| 425 | return 1; |
| 426 | } |
| 427 | |
| 428 | struct gbproxy_peer *gbproxy_find_peer(struct gbproxy_config *cfg, |
| 429 | struct msgb *msg, |
| 430 | struct gprs_gb_parse_context *parse_ctx) |
| 431 | { |
| 432 | struct gbproxy_peer *peer = NULL; |
| 433 | |
| 434 | if (msgb_bvci(msg) >= 2) |
| 435 | peer = gbproxy_peer_by_bvci(cfg, msgb_bvci(msg)); |
| 436 | |
| 437 | if (!peer && !parse_ctx->to_bss) |
| 438 | peer = gbproxy_peer_by_nsei(cfg, msgb_nsei(msg)); |
| 439 | |
| 440 | if (!peer) |
| 441 | peer = gbproxy_peer_by_bssgp_tlv(cfg, &parse_ctx->bssgp_tp); |
| 442 | |
| 443 | if (!peer) { |
| 444 | LOGP(DLLC, LOGL_INFO, |
| 445 | "NSEI=%d(%s) patching: didn't find peer for message, " |
| 446 | "PDU %d\n", |
| 447 | msgb_nsei(msg), parse_ctx->to_bss ? "BSS" : "SGSN", |
| 448 | parse_ctx->pdu_type); |
| 449 | /* Increment counter */ |
| 450 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_PATCH_PEER_ERR]); |
| 451 | } |
| 452 | return peer; |
| 453 | } |
| 454 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 455 | /* patch BSSGP message */ |
Jacob Erlbeck | 5f4ef32 | 2014-08-22 17:10:01 +0200 | [diff] [blame] | 456 | static int gbprox_process_bssgp_ul(struct gbproxy_config *cfg, |
| 457 | struct msgb *msg, |
| 458 | struct gbproxy_peer *peer) |
Jacob Erlbeck | c812882 | 2014-08-07 16:07:24 +0200 | [diff] [blame] | 459 | { |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 460 | struct gprs_gb_parse_context parse_ctx = {0}; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 461 | int rc; |
Jacob Erlbeck | c812882 | 2014-08-07 16:07:24 +0200 | [diff] [blame] | 462 | int len_change = 0; |
Jacob Erlbeck | 7b821d0 | 2014-08-08 08:37:37 +0200 | [diff] [blame] | 463 | time_t now; |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 464 | struct gbproxy_tlli_info *tlli_info = NULL; |
Jacob Erlbeck | cabd24b | 2014-08-27 12:51:07 +0200 | [diff] [blame] | 465 | uint32_t sgsn_nsei = cfg->nsip_sgsn_nsei; |
| 466 | int send_msg_directly = 0; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 467 | |
Jacob Erlbeck | 5f4ef32 | 2014-08-22 17:10:01 +0200 | [diff] [blame] | 468 | if (!cfg->core_mcc && !cfg->core_mnc && !cfg->core_apn && |
Jacob Erlbeck | 1abfdc2 | 2014-09-04 11:42:08 +0200 | [diff] [blame] | 469 | !cfg->acquire_imsi && !cfg->patch_ptmsi && !cfg->route_to_sgsn2) |
Jacob Erlbeck | 5f4ef32 | 2014-08-22 17:10:01 +0200 | [diff] [blame] | 470 | return 1; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 471 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 472 | parse_ctx.to_bss = 0; |
| 473 | |
| 474 | /* Parse BSSGP/LLC */ |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 475 | rc = gprs_gb_parse_bssgp(msgb_bssgph(msg), msgb_bssgp_len(msg), |
| 476 | &parse_ctx); |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 477 | |
| 478 | if (!rc) { |
| 479 | if (!parse_ctx.need_decryption) { |
| 480 | LOGP(DGPRS, LOGL_ERROR, |
Jacob Erlbeck | 643d522 | 2014-08-18 17:26:04 +0200 | [diff] [blame] | 481 | "NSEI=%u(BSS) patching: " |
| 482 | "failed to parse BSSGP/GMM message\n", |
| 483 | msgb_nsei(msg)); |
Jacob Erlbeck | 5f4ef32 | 2014-08-22 17:10:01 +0200 | [diff] [blame] | 484 | return 0; |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 485 | } |
| 486 | } |
| 487 | |
| 488 | /* Get peer */ |
Jacob Erlbeck | 0b243a1 | 2014-09-11 10:30:21 +0200 | [diff] [blame^] | 489 | if (!peer) |
| 490 | peer = gbproxy_find_peer(cfg, msg, &parse_ctx); |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 491 | |
| 492 | if (!peer) |
Jacob Erlbeck | 5f4ef32 | 2014-08-22 17:10:01 +0200 | [diff] [blame] | 493 | return 0; |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 494 | |
| 495 | now = time(NULL); |
| 496 | |
Jacob Erlbeck | 12496dd | 2014-08-18 15:41:41 +0200 | [diff] [blame] | 497 | if (parse_ctx.bssgp_raid_enc && parse_ctx.old_raid_enc && |
| 498 | memcmp(parse_ctx.bssgp_raid_enc, parse_ctx.old_raid_enc, 6) == 0) |
| 499 | parse_ctx.old_raid_matches = 1; |
| 500 | |
| 501 | gbprox_update_current_raid(parse_ctx.bssgp_raid_enc, peer, |
| 502 | parse_ctx.llc_msg_name); |
| 503 | |
Jacob Erlbeck | 3159114 | 2014-09-03 11:59:48 +0200 | [diff] [blame] | 504 | gprs_gb_log_parse_context(&parse_ctx, "BSSGP"); |
| 505 | |
| 506 | tlli_info = gbproxy_update_tlli_state_ul(peer, now, &parse_ctx); |
| 507 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 508 | if (parse_ctx.g48_hdr) { |
| 509 | switch (parse_ctx.g48_hdr->msg_type) { |
| 510 | case GSM48_MT_GMM_ATTACH_REQ: |
| 511 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_ATTACH_REQS]); |
| 512 | break; |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 513 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 514 | default: |
| 515 | break; |
| 516 | } |
| 517 | } |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 518 | |
Jacob Erlbeck | 18a3787 | 2014-09-08 09:59:16 +0200 | [diff] [blame] | 519 | if (tlli_info && cfg->route_to_sgsn2 && gbproxy_check_tlli(peer, tlli_info)) { |
Jacob Erlbeck | cabd24b | 2014-08-27 12:51:07 +0200 | [diff] [blame] | 520 | sgsn_nsei = cfg->nsip_sgsn2_nsei; |
| 521 | send_msg_directly = 1; |
| 522 | } |
| 523 | |
Jacob Erlbeck | 0b243a1 | 2014-09-11 10:30:21 +0200 | [diff] [blame^] | 524 | /* Handle IMSI acquisition */ |
| 525 | if (cfg->acquire_imsi) { |
| 526 | rc = gbproxy_imsi_acquisition(peer, msg, sgsn_nsei, now, |
| 527 | tlli_info, &parse_ctx); |
| 528 | if (rc <= 0) |
| 529 | return rc; |
Jacob Erlbeck | 5f4ef32 | 2014-08-22 17:10:01 +0200 | [diff] [blame] | 530 | } |
| 531 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 532 | gbproxy_patch_bssgp(msg, msgb_bssgph(msg), msgb_bssgp_len(msg), |
| 533 | peer, tlli_info, &len_change, &parse_ctx); |
| 534 | |
| 535 | gbproxy_update_tlli_state_after(peer, tlli_info, now, &parse_ctx); |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 536 | |
Jacob Erlbeck | cabd24b | 2014-08-27 12:51:07 +0200 | [diff] [blame] | 537 | if (send_msg_directly) { |
| 538 | /* Send message directly to the selected SGSN */ |
| 539 | rc = gbprox_relay2sgsn(cfg, msg, msgb_bvci(msg), sgsn_nsei); |
| 540 | /* Don't let the calling code handle the transmission */ |
| 541 | return 0; |
| 542 | } |
| 543 | |
Jacob Erlbeck | 5f4ef32 | 2014-08-22 17:10:01 +0200 | [diff] [blame] | 544 | return 1; |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 545 | } |
| 546 | |
| 547 | /* patch BSSGP message to use core_mcc/mnc on the SGSN side */ |
| 548 | static void gbprox_process_bssgp_dl(struct gbproxy_config *cfg, |
| 549 | struct msgb *msg, |
| 550 | struct gbproxy_peer *peer) |
| 551 | { |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 552 | struct gprs_gb_parse_context parse_ctx = {0}; |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 553 | int rc; |
| 554 | int len_change = 0; |
| 555 | time_t now; |
| 556 | struct gbproxy_tlli_info *tlli_info = NULL; |
| 557 | |
Jacob Erlbeck | 1abfdc2 | 2014-09-04 11:42:08 +0200 | [diff] [blame] | 558 | if (!cfg->core_mcc && !cfg->core_mnc && !cfg->core_apn && |
| 559 | !cfg->acquire_imsi && !cfg->patch_ptmsi && !cfg->route_to_sgsn2) |
| 560 | return; |
| 561 | |
Jacob Erlbeck | 9057bc3 | 2014-08-12 16:30:30 +0200 | [diff] [blame] | 562 | parse_ctx.to_bss = 1; |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 563 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 564 | rc = gprs_gb_parse_bssgp(msgb_bssgph(msg), msgb_bssgp_len(msg), |
| 565 | &parse_ctx); |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 566 | |
| 567 | if (!rc) { |
| 568 | if (!parse_ctx.need_decryption) { |
| 569 | LOGP(DGPRS, LOGL_ERROR, |
Jacob Erlbeck | 643d522 | 2014-08-18 17:26:04 +0200 | [diff] [blame] | 570 | "NSEI=%u(SGSN) patching: " |
| 571 | "failed to parse BSSGP/GMM message\n", |
| 572 | msgb_nsei(msg)); |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 573 | return; |
| 574 | } |
| 575 | } |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 576 | |
Jacob Erlbeck | 0b243a1 | 2014-09-11 10:30:21 +0200 | [diff] [blame^] | 577 | /* Get peer */ |
| 578 | if (!peer) |
| 579 | peer = gbproxy_find_peer(cfg, msg, &parse_ctx); |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 580 | |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 581 | if (!peer) |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 582 | return; |
Jacob Erlbeck | 006c038 | 2014-05-27 13:49:04 +0200 | [diff] [blame] | 583 | |
Jacob Erlbeck | 7b821d0 | 2014-08-08 08:37:37 +0200 | [diff] [blame] | 584 | now = time(NULL); |
| 585 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 586 | if (parse_ctx.g48_hdr) { |
| 587 | switch (parse_ctx.g48_hdr->msg_type) { |
| 588 | case GSM48_MT_GMM_ATTACH_REJ: |
| 589 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_ATTACH_REJS]); |
| 590 | break; |
Jacob Erlbeck | 91fb680 | 2014-05-28 10:59:10 +0200 | [diff] [blame] | 591 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 592 | default: |
| 593 | break; |
| 594 | } |
| 595 | } |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 596 | |
Jacob Erlbeck | 9114bee | 2014-08-19 12:21:01 +0200 | [diff] [blame] | 597 | gprs_gb_log_parse_context(&parse_ctx, "BSSGP"); |
| 598 | |
| 599 | tlli_info = gbproxy_update_tlli_state_dl(peer, now, &parse_ctx); |
| 600 | |
| 601 | gbproxy_patch_bssgp(msg, msgb_bssgph(msg), msgb_bssgp_len(msg), |
| 602 | peer, tlli_info, &len_change, &parse_ctx); |
| 603 | |
| 604 | gbproxy_update_tlli_state_after(peer, tlli_info, now, &parse_ctx); |
Jacob Erlbeck | 2db2512 | 2014-08-06 12:41:31 +0200 | [diff] [blame] | 605 | |
Jacob Erlbeck | 03551e5 | 2014-06-27 19:56:05 +0200 | [diff] [blame] | 606 | return; |
Jacob Erlbeck | 67a4445 | 2014-05-19 10:14:58 +0200 | [diff] [blame] | 607 | } |
| 608 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 609 | /* 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] | 610 | static int gbprox_relay2sgsn(struct gbproxy_config *cfg, struct msgb *old_msg, |
Jacob Erlbeck | f4d60c8 | 2014-08-26 14:47:15 +0200 | [diff] [blame] | 611 | uint16_t ns_bvci, uint16_t sgsn_nsei) |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 612 | { |
Harald Welte | 39d0bb5 | 2010-05-12 18:10:25 +0000 | [diff] [blame] | 613 | /* create a copy of the message so the old one can |
| 614 | * be free()d safely when we return from gbprox_rcvmsg() */ |
Holger Hans Peter Freyther | 7127b02 | 2014-08-04 11:52:52 +0200 | [diff] [blame] | 615 | struct msgb *msg = gprs_msgb_copy(old_msg, "msgb_relay2sgsn"); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 616 | int rc; |
Harald Welte | 39d0bb5 | 2010-05-12 18:10:25 +0000 | [diff] [blame] | 617 | |
Harald Welte | e9ea269 | 2010-05-11 20:20:13 +0200 | [diff] [blame] | 618 | DEBUGP(DGPRS, "NSEI=%u proxying BTS->SGSN (NS_BVCI=%u, NSEI=%u)\n", |
Jacob Erlbeck | f4d60c8 | 2014-08-26 14:47:15 +0200 | [diff] [blame] | 619 | msgb_nsei(msg), ns_bvci, sgsn_nsei); |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 620 | |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 621 | msgb_bvci(msg) = ns_bvci; |
Jacob Erlbeck | f4d60c8 | 2014-08-26 14:47:15 +0200 | [diff] [blame] | 622 | msgb_nsei(msg) = sgsn_nsei; |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 623 | |
Harald Welte | 69619e3 | 2010-05-03 19:05:10 +0200 | [diff] [blame] | 624 | strip_ns_hdr(msg); |
| 625 | |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 626 | rc = gprs_ns_sendmsg(bssgp_nsi, msg); |
| 627 | if (rc < 0) |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 628 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_TX_ERR_SGSN]); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 629 | |
| 630 | return rc; |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 631 | } |
| 632 | |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 633 | /* 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] | 634 | static int gbprox_relay2peer(struct msgb *old_msg, struct gbproxy_peer *peer, |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 635 | uint16_t ns_bvci) |
| 636 | { |
Harald Welte | 39d0bb5 | 2010-05-12 18:10:25 +0000 | [diff] [blame] | 637 | /* create a copy of the message so the old one can |
| 638 | * be free()d safely when we return from gbprox_rcvmsg() */ |
Holger Hans Peter Freyther | 7127b02 | 2014-08-04 11:52:52 +0200 | [diff] [blame] | 639 | struct msgb *msg = gprs_msgb_copy(old_msg, "msgb_relay2peer"); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 640 | int rc; |
Harald Welte | 39d0bb5 | 2010-05-12 18:10:25 +0000 | [diff] [blame] | 641 | |
Harald Welte | 0ab535b | 2010-05-13 10:34:56 +0200 | [diff] [blame] | 642 | 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] | 643 | msgb_nsei(msg), ns_bvci, peer->nsei); |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 644 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 645 | msgb_bvci(msg) = ns_bvci; |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 646 | msgb_nsei(msg) = peer->nsei; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 647 | |
Harald Welte | 0ab535b | 2010-05-13 10:34:56 +0200 | [diff] [blame] | 648 | /* 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] | 649 | strip_ns_hdr(msg); |
| 650 | |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 651 | rc = gprs_ns_sendmsg(bssgp_nsi, msg); |
| 652 | if (rc < 0) |
| 653 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_TX_ERR]); |
| 654 | |
| 655 | return rc; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 656 | } |
| 657 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 658 | 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] | 659 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 660 | struct gbproxy_peer *peer; |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 661 | |
Jacob Erlbeck | 5f1faa3 | 2014-08-21 10:01:30 +0200 | [diff] [blame] | 662 | peer = gbproxy_peer_by_bvci(cfg, ptp_bvci); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 663 | if (!peer) { |
| 664 | LOGP(DGPRS, LOGL_ERROR, "BVCI=%u: Cannot find BSS\n", |
| 665 | ptp_bvci); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 666 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 667 | return -ENOENT; |
| 668 | } |
| 669 | |
| 670 | switch (pdu_type) { |
| 671 | case BSSGP_PDUT_BVC_BLOCK_ACK: |
| 672 | peer->blocked = 1; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 673 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_BLOCKED]); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 674 | break; |
| 675 | case BSSGP_PDUT_BVC_UNBLOCK_ACK: |
| 676 | peer->blocked = 0; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 677 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_UNBLOCKED]); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 678 | break; |
| 679 | default: |
| 680 | break; |
| 681 | } |
| 682 | return 0; |
| 683 | } |
| 684 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 685 | /* Send a message to a peer identified by ptp_bvci but using ns_bvci |
| 686 | * in the NS hdr */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 687 | 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] | 688 | uint16_t ns_bvci) |
| 689 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 690 | struct gbproxy_peer *peer; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 691 | |
Jacob Erlbeck | 5f1faa3 | 2014-08-21 10:01:30 +0200 | [diff] [blame] | 692 | peer = gbproxy_peer_by_bvci(cfg, ptp_bvci); |
Harald Welte | 1c77c6e | 2010-05-03 21:37:11 +0200 | [diff] [blame] | 693 | if (!peer) { |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 694 | LOGP(DGPRS, LOGL_ERROR, "BVCI=%u: Cannot find BSS\n", |
Harald Welte | 1c77c6e | 2010-05-03 21:37:11 +0200 | [diff] [blame] | 695 | ptp_bvci); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 696 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 697 | return -ENOENT; |
Harald Welte | 1c77c6e | 2010-05-03 21:37:11 +0200 | [diff] [blame] | 698 | } |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 699 | |
Harald Welte | 69619e3 | 2010-05-03 19:05:10 +0200 | [diff] [blame] | 700 | return gbprox_relay2peer(msg, peer, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 701 | } |
| 702 | |
Harald Welte | b1fd902 | 2012-06-17 12:16:31 +0800 | [diff] [blame] | 703 | int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) |
| 704 | { |
| 705 | return 0; |
| 706 | } |
| 707 | |
Jacob Erlbeck | 46f1d6f | 2014-08-21 13:45:04 +0200 | [diff] [blame] | 708 | /* Receive an incoming PTP message from a BSS-side NS-VC */ |
| 709 | static int gbprox_rx_ptp_from_bss(struct gbproxy_config *cfg, |
| 710 | struct msgb *msg, uint16_t nsei, |
| 711 | uint16_t nsvci, uint16_t ns_bvci) |
| 712 | { |
| 713 | struct gbproxy_peer *peer; |
Jacob Erlbeck | c1c57d3 | 2014-08-28 13:20:39 +0200 | [diff] [blame] | 714 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
| 715 | uint8_t pdu_type = bgph->pdu_type; |
Jacob Erlbeck | 5f4ef32 | 2014-08-22 17:10:01 +0200 | [diff] [blame] | 716 | int rc; |
Jacob Erlbeck | 46f1d6f | 2014-08-21 13:45:04 +0200 | [diff] [blame] | 717 | |
| 718 | peer = gbproxy_peer_by_bvci(cfg, ns_bvci); |
| 719 | |
| 720 | if (peer) |
| 721 | check_peer_nsei(peer, nsei); |
| 722 | |
Jacob Erlbeck | 5f4ef32 | 2014-08-22 17:10:01 +0200 | [diff] [blame] | 723 | rc = gbprox_process_bssgp_ul(cfg, msg, peer); |
| 724 | if (!rc) |
| 725 | return 0; |
Jacob Erlbeck | 46f1d6f | 2014-08-21 13:45:04 +0200 | [diff] [blame] | 726 | |
Jacob Erlbeck | c1c57d3 | 2014-08-28 13:20:39 +0200 | [diff] [blame] | 727 | switch (pdu_type) { |
| 728 | case BSSGP_PDUT_FLOW_CONTROL_BVC: |
| 729 | if (!cfg->route_to_sgsn2) |
| 730 | break; |
| 731 | |
| 732 | /* Send a copy to the secondary SGSN */ |
| 733 | gbprox_relay2sgsn(cfg, msg, ns_bvci, cfg->nsip_sgsn2_nsei); |
| 734 | break; |
| 735 | default: |
| 736 | break; |
| 737 | } |
| 738 | |
| 739 | |
Jacob Erlbeck | f4d60c8 | 2014-08-26 14:47:15 +0200 | [diff] [blame] | 740 | return gbprox_relay2sgsn(cfg, msg, ns_bvci, cfg->nsip_sgsn_nsei); |
Jacob Erlbeck | 46f1d6f | 2014-08-21 13:45:04 +0200 | [diff] [blame] | 741 | } |
| 742 | |
| 743 | /* Receive an incoming PTP message from a SGSN-side NS-VC */ |
| 744 | static int gbprox_rx_ptp_from_sgsn(struct gbproxy_config *cfg, |
| 745 | struct msgb *msg, uint16_t nsei, |
| 746 | uint16_t nsvci, uint16_t ns_bvci) |
| 747 | { |
| 748 | struct gbproxy_peer *peer; |
Jacob Erlbeck | c1c57d3 | 2014-08-28 13:20:39 +0200 | [diff] [blame] | 749 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
| 750 | uint8_t pdu_type = bgph->pdu_type; |
Jacob Erlbeck | 46f1d6f | 2014-08-21 13:45:04 +0200 | [diff] [blame] | 751 | |
| 752 | peer = gbproxy_peer_by_bvci(cfg, ns_bvci); |
| 753 | |
Jacob Erlbeck | 4b663ac | 2014-08-21 15:07:11 +0200 | [diff] [blame] | 754 | /* Send status messages before patching */ |
| 755 | |
Jacob Erlbeck | 46f1d6f | 2014-08-21 13:45:04 +0200 | [diff] [blame] | 756 | if (!peer) { |
| 757 | LOGP(DGPRS, LOGL_INFO, "Didn't find peer for " |
| 758 | "BVCI=%u for message from NSVC=%u/NSEI=%u (SGSN)\n", |
| 759 | ns_bvci, nsvci, nsei); |
| 760 | rate_ctr_inc(&cfg->ctrg-> |
| 761 | ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
| 762 | return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, |
| 763 | &ns_bvci, msg); |
| 764 | } |
| 765 | |
| 766 | if (peer->blocked) { |
| 767 | LOGP(DGPRS, LOGL_NOTICE, "Dropping PDU for " |
| 768 | "blocked BVCI=%u via NSVC=%u/NSEI=%u\n", |
| 769 | ns_bvci, nsvci, nsei); |
| 770 | rate_ctr_inc(&peer->ctrg->ctr[GBPROX_PEER_CTR_DROPPED]); |
Jacob Erlbeck | 17b42b8 | 2014-08-29 12:20:15 +0200 | [diff] [blame] | 771 | return bssgp_tx_status(BSSGP_CAUSE_BVCI_BLOCKED, &ns_bvci, msg); |
Jacob Erlbeck | 46f1d6f | 2014-08-21 13:45:04 +0200 | [diff] [blame] | 772 | } |
| 773 | |
Jacob Erlbeck | c1c57d3 | 2014-08-28 13:20:39 +0200 | [diff] [blame] | 774 | switch (pdu_type) { |
| 775 | case BSSGP_PDUT_FLOW_CONTROL_BVC_ACK: |
| 776 | case BSSGP_PDUT_BVC_BLOCK_ACK: |
| 777 | case BSSGP_PDUT_BVC_UNBLOCK_ACK: |
| 778 | if (cfg->route_to_sgsn2 && nsei == cfg->nsip_sgsn2_nsei) |
| 779 | /* Hide ACKs from the secondary SGSN, the primary SGSN |
| 780 | * is responsible to send them. */ |
| 781 | return 0; |
| 782 | break; |
| 783 | default: |
| 784 | break; |
| 785 | } |
| 786 | |
Jacob Erlbeck | 4b663ac | 2014-08-21 15:07:11 +0200 | [diff] [blame] | 787 | /* Optionally patch the message */ |
| 788 | gbprox_process_bssgp_dl(cfg, msg, peer); |
| 789 | |
Jacob Erlbeck | 46f1d6f | 2014-08-21 13:45:04 +0200 | [diff] [blame] | 790 | return gbprox_relay2peer(msg, peer, ns_bvci); |
| 791 | } |
| 792 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 793 | /* 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] | 794 | static int gbprox_rx_sig_from_bss(struct gbproxy_config *cfg, |
| 795 | struct msgb *msg, uint16_t nsei, |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 796 | uint16_t ns_bvci) |
| 797 | { |
Harald Welte | ca3620a | 2010-05-03 16:30:59 +0200 | [diff] [blame] | 798 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 799 | struct tlv_parsed tp; |
| 800 | uint8_t pdu_type = bgph->pdu_type; |
Harald Welte | ca3620a | 2010-05-03 16:30:59 +0200 | [diff] [blame] | 801 | int data_len = msgb_bssgp_len(msg) - sizeof(*bgph); |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 802 | struct gbproxy_peer *from_peer = NULL; |
Harald Welte | 70f38d2 | 2010-05-01 12:10:57 +0200 | [diff] [blame] | 803 | struct gprs_ra_id raid; |
Jacob Erlbeck | c1c57d3 | 2014-08-28 13:20:39 +0200 | [diff] [blame] | 804 | int copy_to_sgsn2 = 0; |
Jacob Erlbeck | 5930064 | 2014-09-08 09:04:01 +0200 | [diff] [blame] | 805 | int rc; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 806 | |
Harald Welte | c471d3d | 2011-02-06 17:13:12 +0100 | [diff] [blame] | 807 | if (ns_bvci != 0 && ns_bvci != 1) { |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 808 | LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u BVCI=%u is not signalling\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 809 | nsei, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 810 | return -EINVAL; |
| 811 | } |
| 812 | |
| 813 | /* we actually should never see those two for BVCI == 0, but double-check |
| 814 | * just to make sure */ |
| 815 | if (pdu_type == BSSGP_PDUT_UL_UNITDATA || |
| 816 | pdu_type == BSSGP_PDUT_DL_UNITDATA) { |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 817 | LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u UNITDATA not allowed in " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 818 | "signalling\n", nsei); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 819 | return -EINVAL; |
| 820 | } |
| 821 | |
| 822 | bssgp_tlv_parse(&tp, bgph->data, data_len); |
| 823 | |
| 824 | switch (pdu_type) { |
| 825 | case BSSGP_PDUT_SUSPEND: |
| 826 | case BSSGP_PDUT_RESUME: |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 827 | /* We implement RAI snooping during SUSPEND/RESUME, since it |
| 828 | * establishes a relationsip between BVCI/peer and the routeing |
| 829 | * area identification. The snooped information is then used |
| 830 | * for routing the {SUSPEND,RESUME}_[N]ACK back to the correct |
| 831 | * BSSGP */ |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 832 | if (!TLVP_PRESENT(&tp, BSSGP_IE_ROUTEING_AREA)) |
| 833 | goto err_mand_ie; |
Jacob Erlbeck | 5f1faa3 | 2014-08-21 10:01:30 +0200 | [diff] [blame] | 834 | from_peer = gbproxy_peer_by_nsei(cfg, nsei); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 835 | if (!from_peer) |
| 836 | goto err_no_peer; |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 837 | memcpy(from_peer->ra, TLVP_VAL(&tp, BSSGP_IE_ROUTEING_AREA), |
| 838 | sizeof(from_peer->ra)); |
Harald Welte | 7fc9822 | 2010-05-11 10:15:42 +0200 | [diff] [blame] | 839 | gsm48_parse_ra(&raid, from_peer->ra); |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 840 | LOGP(DGPRS, LOGL_INFO, "NSEI=%u BSSGP SUSPEND/RESUME " |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 841 | "RAI snooping: RAI %u-%u-%u-%u behind BVCI=%u\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 842 | nsei, raid.mcc, raid.mnc, raid.lac, |
| 843 | raid.rac , from_peer->bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 844 | /* FIXME: This only supports one BSS per RA */ |
| 845 | break; |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 846 | case BSSGP_PDUT_BVC_RESET: |
| 847 | /* If we receive a BVC reset on the signalling endpoint, we |
| 848 | * don't want the SGSN to reset, as the signalling endpoint |
| 849 | * is common for all point-to-point BVCs (and thus all BTS) */ |
| 850 | if (TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) { |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 851 | uint16_t bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
Harald Welte | 72953b8 | 2010-05-12 00:20:41 +0200 | [diff] [blame] | 852 | LOGP(DGPRS, LOGL_INFO, "NSEI=%u Rx BVC RESET (BVCI=%u)\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 853 | nsei, bvci); |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 854 | if (bvci == 0) { |
| 855 | /* FIXME: only do this if SGSN is alive! */ |
Harald Welte | e9ea269 | 2010-05-11 20:20:13 +0200 | [diff] [blame] | 856 | LOGP(DGPRS, LOGL_INFO, "NSEI=%u Tx fake " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 857 | "BVC RESET ACK of BVCI=0\n", nsei); |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 858 | return bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_RESET_ACK, |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 859 | nsei, 0, ns_bvci); |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 860 | } |
Jacob Erlbeck | 5f1faa3 | 2014-08-21 10:01:30 +0200 | [diff] [blame] | 861 | from_peer = gbproxy_peer_by_bvci(cfg, bvci); |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 862 | if (!from_peer) { |
Harald Welte | 1c77c6e | 2010-05-03 21:37:11 +0200 | [diff] [blame] | 863 | /* if a PTP-BVC is reset, and we don't know that |
| 864 | * PTP-BVCI yet, we should allocate a new peer */ |
| 865 | LOGP(DGPRS, LOGL_INFO, "Allocationg new peer for " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 866 | "BVCI=%u via NSEI=%u\n", bvci, nsei); |
Holger Hans Peter Freyther | 0196c99 | 2014-08-04 17:10:08 +0200 | [diff] [blame] | 867 | from_peer = gbproxy_peer_alloc(cfg, bvci); |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 868 | from_peer->nsei = nsei; |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 869 | } |
Jacob Erlbeck | 64cb924 | 2013-10-24 12:48:56 +0200 | [diff] [blame] | 870 | |
| 871 | if (!check_peer_nsei(from_peer, nsei)) |
| 872 | from_peer->nsei = nsei; |
| 873 | |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 874 | if (TLVP_PRESENT(&tp, BSSGP_IE_CELL_ID)) { |
| 875 | struct gprs_ra_id raid; |
| 876 | /* We have a Cell Identifier present in this |
| 877 | * PDU, this means we can extend our local |
| 878 | * state information about this particular cell |
| 879 | * */ |
| 880 | memcpy(from_peer->ra, |
| 881 | TLVP_VAL(&tp, BSSGP_IE_CELL_ID), |
| 882 | sizeof(from_peer->ra)); |
| 883 | gsm48_parse_ra(&raid, from_peer->ra); |
| 884 | LOGP(DGPRS, LOGL_INFO, "NSEI=%u/BVCI=%u " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 885 | "Cell ID %u-%u-%u-%u\n", nsei, |
Harald Welte | 1174c08 | 2010-05-12 00:07:29 +0200 | [diff] [blame] | 886 | bvci, raid.mcc, raid.mnc, raid.lac, |
| 887 | raid.rac); |
| 888 | } |
Jacob Erlbeck | c1c57d3 | 2014-08-28 13:20:39 +0200 | [diff] [blame] | 889 | if (cfg->route_to_sgsn2) |
| 890 | copy_to_sgsn2 = 1; |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 891 | } |
| 892 | break; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 893 | } |
| 894 | |
Harald Welte | e9ea269 | 2010-05-11 20:20:13 +0200 | [diff] [blame] | 895 | /* Normally, we can simply pass on all signalling messages from BSS to |
| 896 | * SGSN */ |
Jacob Erlbeck | 5930064 | 2014-09-08 09:04:01 +0200 | [diff] [blame] | 897 | rc = gbprox_process_bssgp_ul(cfg, msg, from_peer); |
| 898 | if (!rc) |
| 899 | return 0; |
Jacob Erlbeck | c1c57d3 | 2014-08-28 13:20:39 +0200 | [diff] [blame] | 900 | |
| 901 | if (copy_to_sgsn2) |
| 902 | gbprox_relay2sgsn(cfg, msg, ns_bvci, cfg->nsip_sgsn2_nsei); |
| 903 | |
Jacob Erlbeck | f4d60c8 | 2014-08-26 14:47:15 +0200 | [diff] [blame] | 904 | return gbprox_relay2sgsn(cfg, msg, ns_bvci, cfg->nsip_sgsn_nsei); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 905 | err_no_peer: |
Jacob Erlbeck | c5085f9 | 2013-10-18 13:04:48 +0200 | [diff] [blame] | 906 | 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] | 907 | nsei); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 908 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_NSEI]); |
Jacob Erlbeck | 17b42b8 | 2014-08-29 12:20:15 +0200 | [diff] [blame] | 909 | return bssgp_tx_status(BSSGP_CAUSE_INV_MAND_INF, NULL, msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 910 | err_mand_ie: |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 911 | LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(BSS) missing mandatory RA IE\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 912 | nsei); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 913 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_PROTO_ERR_BSS]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 914 | return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 915 | } |
| 916 | |
| 917 | /* 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] | 918 | 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] | 919 | uint32_t nsei, uint16_t ns_bvci) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 920 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 921 | struct gbproxy_peer *peer = NULL; |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 922 | int errctr = GBPROX_GLOB_CTR_PROTO_ERR_SGSN; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 923 | |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 924 | LOGP(DGPRS, LOGL_INFO, "NSEI=%u(SGSN) BSSGP PAGING ", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 925 | nsei); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 926 | if (TLVP_PRESENT(tp, BSSGP_IE_BVCI)) { |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 927 | uint16_t bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 928 | LOGPC(DGPRS, LOGL_INFO, "routing by BVCI to peer BVCI=%u\n", |
| 929 | bvci); |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 930 | errctr = GBPROX_GLOB_CTR_OTHER_ERR; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 931 | } else if (TLVP_PRESENT(tp, BSSGP_IE_ROUTEING_AREA)) { |
Jacob Erlbeck | 5f1faa3 | 2014-08-21 10:01:30 +0200 | [diff] [blame] | 932 | peer = gbproxy_peer_by_rai(cfg, TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA)); |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 933 | 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] | 934 | peer ? peer->bvci : -1); |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 935 | errctr = GBPROX_GLOB_CTR_INV_RAI; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 936 | } else if (TLVP_PRESENT(tp, BSSGP_IE_LOCATION_AREA)) { |
Jacob Erlbeck | 5f1faa3 | 2014-08-21 10:01:30 +0200 | [diff] [blame] | 937 | peer = gbproxy_peer_by_lai(cfg, TLVP_VAL(tp, BSSGP_IE_LOCATION_AREA)); |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 938 | 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] | 939 | peer ? peer->bvci : -1); |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 940 | errctr = GBPROX_GLOB_CTR_INV_LAI; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 941 | } else |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 942 | LOGPC(DGPRS, LOGL_INFO, "\n"); |
| 943 | |
| 944 | if (!peer) { |
| 945 | LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) BSSGP PAGING: " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 946 | "unable to route, missing IE\n", nsei); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 947 | rate_ctr_inc(&cfg->ctrg->ctr[errctr]); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 948 | return -EINVAL; |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 949 | } |
| 950 | return gbprox_relay2peer(msg, peer, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 951 | } |
| 952 | |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 953 | /* Receive an incoming BVC-RESET message from the SGSN */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 954 | static int rx_reset_from_sgsn(struct gbproxy_config *cfg, |
Jacob Erlbeck | 4b663ac | 2014-08-21 15:07:11 +0200 | [diff] [blame] | 955 | struct msgb *orig_msg, |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 956 | struct msgb *msg, struct tlv_parsed *tp, |
| 957 | uint32_t nsei, uint16_t ns_bvci) |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 958 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 959 | struct gbproxy_peer *peer; |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 960 | uint16_t ptp_bvci; |
| 961 | |
| 962 | if (!TLVP_PRESENT(tp, BSSGP_IE_BVCI)) { |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 963 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 964 | ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 965 | return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, |
Jacob Erlbeck | 4b663ac | 2014-08-21 15:07:11 +0200 | [diff] [blame] | 966 | NULL, orig_msg); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 967 | } |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 968 | ptp_bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 969 | |
| 970 | if (ptp_bvci >= 2) { |
| 971 | /* A reset for a PTP BVC was received, forward it to its |
| 972 | * respective peer */ |
Jacob Erlbeck | 5f1faa3 | 2014-08-21 10:01:30 +0200 | [diff] [blame] | 973 | peer = gbproxy_peer_by_bvci(cfg, ptp_bvci); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 974 | if (!peer) { |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 975 | LOGP(DGPRS, LOGL_ERROR, "NSEI=%u BVCI=%u: Cannot find BSS\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 976 | nsei, ptp_bvci); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 977 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 978 | ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 979 | return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, |
Jacob Erlbeck | 17b42b8 | 2014-08-29 12:20:15 +0200 | [diff] [blame] | 980 | &ptp_bvci, orig_msg); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 981 | } |
| 982 | return gbprox_relay2peer(msg, peer, ns_bvci); |
| 983 | } |
| 984 | |
| 985 | /* A reset for the Signalling entity has been received |
| 986 | * from the SGSN. As the signalling BVCI is shared |
| 987 | * among all the BSS's that we multiplex, it needs to |
| 988 | * be relayed */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 989 | llist_for_each_entry(peer, &cfg->bts_peers, list) |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 990 | gbprox_relay2peer(msg, peer, ns_bvci); |
| 991 | |
| 992 | return 0; |
| 993 | } |
| 994 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 995 | /* 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] | 996 | static int gbprox_rx_sig_from_sgsn(struct gbproxy_config *cfg, |
Jacob Erlbeck | 4b663ac | 2014-08-21 15:07:11 +0200 | [diff] [blame] | 997 | struct msgb *orig_msg, uint32_t nsei, |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 998 | uint16_t ns_bvci) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 999 | { |
Jacob Erlbeck | 4b663ac | 2014-08-21 15:07:11 +0200 | [diff] [blame] | 1000 | struct bssgp_normal_hdr *bgph = |
| 1001 | (struct bssgp_normal_hdr *) msgb_bssgph(orig_msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1002 | struct tlv_parsed tp; |
| 1003 | uint8_t pdu_type = bgph->pdu_type; |
Jacob Erlbeck | 4b663ac | 2014-08-21 15:07:11 +0200 | [diff] [blame] | 1004 | int data_len; |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 1005 | struct gbproxy_peer *peer; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1006 | uint16_t bvci; |
Jacob Erlbeck | 4b663ac | 2014-08-21 15:07:11 +0200 | [diff] [blame] | 1007 | struct msgb *msg; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1008 | int rc = 0; |
Jacob Erlbeck | 1e65b0e | 2014-08-29 13:32:17 +0200 | [diff] [blame] | 1009 | int cause; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1010 | |
Harald Welte | c471d3d | 2011-02-06 17:13:12 +0100 | [diff] [blame] | 1011 | if (ns_bvci != 0 && ns_bvci != 1) { |
Harald Welte | 4cf12e9 | 2010-05-13 14:14:56 +0200 | [diff] [blame] | 1012 | LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) BVCI=%u is not " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 1013 | "signalling\n", nsei, ns_bvci); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 1014 | /* FIXME: Send proper error message */ |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1015 | return -EINVAL; |
| 1016 | } |
| 1017 | |
| 1018 | /* we actually should never see those two for BVCI == 0, but double-check |
| 1019 | * just to make sure */ |
| 1020 | if (pdu_type == BSSGP_PDUT_UL_UNITDATA || |
| 1021 | pdu_type == BSSGP_PDUT_DL_UNITDATA) { |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 1022 | LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) UNITDATA not allowed in " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 1023 | "signalling\n", nsei); |
Jacob Erlbeck | 4b663ac | 2014-08-21 15:07:11 +0200 | [diff] [blame] | 1024 | return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, orig_msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1025 | } |
| 1026 | |
Jacob Erlbeck | 4b663ac | 2014-08-21 15:07:11 +0200 | [diff] [blame] | 1027 | msg = gprs_msgb_copy(orig_msg, "rx_sig_from_sgsn"); |
| 1028 | gbprox_process_bssgp_dl(cfg, msg, NULL); |
| 1029 | /* Update message info */ |
| 1030 | bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
| 1031 | data_len = msgb_bssgp_len(orig_msg) - sizeof(*bgph); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1032 | rc = bssgp_tlv_parse(&tp, bgph->data, data_len); |
| 1033 | |
| 1034 | switch (pdu_type) { |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 1035 | case BSSGP_PDUT_BVC_RESET: |
Jacob Erlbeck | 4b663ac | 2014-08-21 15:07:11 +0200 | [diff] [blame] | 1036 | rc = rx_reset_from_sgsn(cfg, msg, orig_msg, &tp, nsei, ns_bvci); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 1037 | break; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1038 | case BSSGP_PDUT_BVC_RESET_ACK: |
Jacob Erlbeck | c1c57d3 | 2014-08-28 13:20:39 +0200 | [diff] [blame] | 1039 | if (cfg->route_to_sgsn2 && nsei == cfg->nsip_sgsn2_nsei) |
| 1040 | break; |
| 1041 | /* fall through */ |
| 1042 | case BSSGP_PDUT_FLUSH_LL: |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1043 | /* simple case: BVCI IE is mandatory */ |
| 1044 | if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) |
| 1045 | goto err_mand_ie; |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 1046 | bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1047 | rc = gbprox_relay2bvci(cfg, msg, bvci, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1048 | break; |
| 1049 | case BSSGP_PDUT_PAGING_PS: |
| 1050 | case BSSGP_PDUT_PAGING_CS: |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 1051 | /* process the paging request (LAI/RAI lookup) */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1052 | rc = gbprox_rx_paging(cfg, msg, &tp, nsei, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1053 | break; |
| 1054 | case BSSGP_PDUT_STATUS: |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 1055 | /* Some exception has occurred */ |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 1056 | LOGP(DGPRS, LOGL_NOTICE, |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 1057 | "NSEI=%u(SGSN) BSSGP STATUS ", nsei); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 1058 | if (!TLVP_PRESENT(&tp, BSSGP_IE_CAUSE)) { |
| 1059 | LOGPC(DGPRS, LOGL_NOTICE, "\n"); |
| 1060 | goto err_mand_ie; |
| 1061 | } |
Jacob Erlbeck | 1e65b0e | 2014-08-29 13:32:17 +0200 | [diff] [blame] | 1062 | cause = *TLVP_VAL(&tp, BSSGP_IE_CAUSE); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 1063 | LOGPC(DGPRS, LOGL_NOTICE, |
| 1064 | "cause=0x%02x(%s) ", *TLVP_VAL(&tp, BSSGP_IE_CAUSE), |
Jacob Erlbeck | 1e65b0e | 2014-08-29 13:32:17 +0200 | [diff] [blame] | 1065 | bssgp_cause_str(cause)); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 1066 | if (TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) { |
Jacob Erlbeck | 1e65b0e | 2014-08-29 13:32:17 +0200 | [diff] [blame] | 1067 | bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
| 1068 | LOGPC(DGPRS, LOGL_NOTICE, "BVCI=%u\n", bvci); |
| 1069 | |
| 1070 | if (cause == BSSGP_CAUSE_UNKNOWN_BVCI) |
| 1071 | rc = gbprox_relay2bvci(cfg, msg, bvci, ns_bvci); |
Harald Welte | 0a4050c | 2010-05-11 10:01:17 +0200 | [diff] [blame] | 1072 | } else |
| 1073 | LOGPC(DGPRS, LOGL_NOTICE, "\n"); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1074 | break; |
| 1075 | /* those only exist in the SGSN -> BSS direction */ |
| 1076 | case BSSGP_PDUT_SUSPEND_ACK: |
| 1077 | case BSSGP_PDUT_SUSPEND_NACK: |
| 1078 | case BSSGP_PDUT_RESUME_ACK: |
| 1079 | case BSSGP_PDUT_RESUME_NACK: |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 1080 | /* RAI IE is mandatory */ |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1081 | if (!TLVP_PRESENT(&tp, BSSGP_IE_ROUTEING_AREA)) |
| 1082 | goto err_mand_ie; |
Jacob Erlbeck | 5f1faa3 | 2014-08-21 10:01:30 +0200 | [diff] [blame] | 1083 | peer = gbproxy_peer_by_rai(cfg, TLVP_VAL(&tp, BSSGP_IE_ROUTEING_AREA)); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1084 | if (!peer) |
| 1085 | goto err_no_peer; |
Harald Welte | 69619e3 | 2010-05-03 19:05:10 +0200 | [diff] [blame] | 1086 | rc = gbprox_relay2peer(msg, peer, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1087 | break; |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 1088 | case BSSGP_PDUT_BVC_BLOCK_ACK: |
| 1089 | case BSSGP_PDUT_BVC_UNBLOCK_ACK: |
| 1090 | if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) |
| 1091 | goto err_mand_ie; |
Holger Hans Peter Freyther | ffd6856 | 2012-09-04 20:42:20 +0200 | [diff] [blame] | 1092 | bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 1093 | if (bvci == 0) { |
| 1094 | LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) BSSGP " |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 1095 | "%sBLOCK_ACK for signalling BVCI ?!?\n", nsei, |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 1096 | pdu_type == BSSGP_PDUT_BVC_UNBLOCK_ACK ? "UN":""); |
| 1097 | /* should we send STATUS ? */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1098 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 1099 | ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 1100 | } else { |
| 1101 | /* Mark BVC as (un)blocked */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1102 | block_unblock_peer(cfg, bvci, pdu_type); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 1103 | } |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1104 | rc = gbprox_relay2bvci(cfg, msg, bvci, ns_bvci); |
Harald Welte | 36f98d9 | 2011-02-06 13:09:29 +0100 | [diff] [blame] | 1105 | break; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1106 | case BSSGP_PDUT_SGSN_INVOKE_TRACE: |
Harald Welte | 44c4830 | 2010-05-03 19:22:32 +0200 | [diff] [blame] | 1107 | LOGP(DGPRS, LOGL_ERROR, |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 1108 | "NSEI=%u(SGSN) BSSGP INVOKE TRACE not supported\n",nsei); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1109 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 1110 | ctr[GBPROX_GLOB_CTR_NOT_SUPPORTED_SGSN]); |
Jacob Erlbeck | 4b663ac | 2014-08-21 15:07:11 +0200 | [diff] [blame] | 1111 | rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, orig_msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1112 | break; |
| 1113 | default: |
Harald Welte | 72953b8 | 2010-05-12 00:20:41 +0200 | [diff] [blame] | 1114 | LOGP(DGPRS, LOGL_NOTICE, "BSSGP PDU type 0x%02x unknown\n", |
| 1115 | pdu_type); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1116 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 1117 | ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); |
Jacob Erlbeck | 4b663ac | 2014-08-21 15:07:11 +0200 | [diff] [blame] | 1118 | rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, orig_msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1119 | break; |
| 1120 | } |
| 1121 | |
Jacob Erlbeck | 4b663ac | 2014-08-21 15:07:11 +0200 | [diff] [blame] | 1122 | msgb_free(msg); |
| 1123 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1124 | return rc; |
| 1125 | err_mand_ie: |
Harald Welte | 1c77c6e | 2010-05-03 21:37:11 +0200 | [diff] [blame] | 1126 | LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) missing mandatory IE\n", |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 1127 | nsei); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1128 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 1129 | ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); |
Jacob Erlbeck | 4b663ac | 2014-08-21 15:07:11 +0200 | [diff] [blame] | 1130 | msgb_free(msg); |
| 1131 | return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, orig_msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1132 | err_no_peer: |
Jacob Erlbeck | 8f50359 | 2014-06-02 10:49:00 +0200 | [diff] [blame] | 1133 | 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] | 1134 | nsei); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1135 | rate_ctr_inc(&cfg->ctrg-> ctr[GBPROX_GLOB_CTR_INV_RAI]); |
Jacob Erlbeck | 4b663ac | 2014-08-21 15:07:11 +0200 | [diff] [blame] | 1136 | msgb_free(msg); |
Jacob Erlbeck | 17b42b8 | 2014-08-29 12:20:15 +0200 | [diff] [blame] | 1137 | return bssgp_tx_status(BSSGP_CAUSE_INV_MAND_INF, NULL, orig_msg); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1138 | } |
| 1139 | |
Jacob Erlbeck | f4d60c8 | 2014-08-26 14:47:15 +0200 | [diff] [blame] | 1140 | static int gbproxy_is_sgsn_nsei(struct gbproxy_config *cfg, uint16_t nsei) |
| 1141 | { |
| 1142 | return nsei == cfg->nsip_sgsn_nsei || |
| 1143 | (cfg->route_to_sgsn2 && nsei == cfg->nsip_sgsn2_nsei); |
| 1144 | } |
| 1145 | |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1146 | /* Main input function for Gb proxy */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1147 | int gbprox_rcvmsg(struct gbproxy_config *cfg, struct msgb *msg, uint16_t nsei, |
| 1148 | uint16_t ns_bvci, uint16_t nsvci) |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1149 | { |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 1150 | int rc; |
Jacob Erlbeck | f4d60c8 | 2014-08-26 14:47:15 +0200 | [diff] [blame] | 1151 | int remote_end_is_sgsn = gbproxy_is_sgsn_nsei(cfg, nsei); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1152 | |
| 1153 | /* Only BVCI=0 messages need special treatment */ |
| 1154 | if (ns_bvci == 0 || ns_bvci == 1) { |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 1155 | if (remote_end_is_sgsn) |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1156 | rc = gbprox_rx_sig_from_sgsn(cfg, msg, nsei, ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1157 | else |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1158 | rc = gbprox_rx_sig_from_bss(cfg, msg, nsei, ns_bvci); |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 1159 | } else { |
Jacob Erlbeck | 46f1d6f | 2014-08-21 13:45:04 +0200 | [diff] [blame] | 1160 | /* All other BVCI are PTP */ |
| 1161 | if (remote_end_is_sgsn) |
| 1162 | rc = gbprox_rx_ptp_from_sgsn(cfg, msg, nsei, nsvci, |
| 1163 | ns_bvci); |
| 1164 | else |
| 1165 | rc = gbprox_rx_ptp_from_bss(cfg, msg, nsei, nsvci, |
| 1166 | ns_bvci); |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1167 | } |
| 1168 | |
Harald Welte | 672f5c4 | 2010-05-03 18:54:58 +0200 | [diff] [blame] | 1169 | return rc; |
Harald Welte | 9f75c35 | 2010-04-30 20:26:32 +0200 | [diff] [blame] | 1170 | } |
Harald Welte | 85801d0 | 2010-05-11 05:49:43 +0200 | [diff] [blame] | 1171 | |
Harald Welte | 1ccbf44 | 2010-05-14 11:53:08 +0000 | [diff] [blame] | 1172 | int gbprox_reset_persistent_nsvcs(struct gprs_ns_inst *nsi) |
| 1173 | { |
| 1174 | struct gprs_nsvc *nsvc; |
| 1175 | |
| 1176 | llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) { |
| 1177 | if (!nsvc->persistent) |
| 1178 | continue; |
| 1179 | gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION); |
| 1180 | } |
| 1181 | return 0; |
| 1182 | } |
| 1183 | |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 1184 | /* Signal handler for signals from NS layer */ |
| 1185 | int gbprox_signal(unsigned int subsys, unsigned int signal, |
| 1186 | void *handler_data, void *signal_data) |
| 1187 | { |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1188 | struct gbproxy_config *cfg = handler_data; |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 1189 | struct ns_signal_data *nssd = signal_data; |
| 1190 | struct gprs_nsvc *nsvc = nssd->nsvc; |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 1191 | struct gbproxy_peer *peer; |
Jacob Erlbeck | f4d60c8 | 2014-08-26 14:47:15 +0200 | [diff] [blame] | 1192 | int remote_end_is_sgsn = gbproxy_is_sgsn_nsei(cfg, nsvc->nsei); |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 1193 | |
Harald Welte | a6a20b4 | 2012-06-16 16:40:42 +0800 | [diff] [blame] | 1194 | if (subsys != SS_L_NS) |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 1195 | return 0; |
| 1196 | |
Jacob Erlbeck | f4d60c8 | 2014-08-26 14:47:15 +0200 | [diff] [blame] | 1197 | if (signal == S_NS_RESET && remote_end_is_sgsn) { |
Harald Welte | f69c059 | 2010-05-11 18:29:44 +0200 | [diff] [blame] | 1198 | /* We have received a NS-RESET from the NSEI and NSVC |
| 1199 | * of the SGSN. This might happen with SGSN that start |
| 1200 | * their own NS-RESET procedure without waiting for our |
| 1201 | * NS-RESET */ |
| 1202 | nsvc->remote_end_is_sgsn = 1; |
| 1203 | } |
| 1204 | |
Harald Welte | b778d2c | 2010-05-12 13:28:25 +0000 | [diff] [blame] | 1205 | if (signal == S_NS_ALIVE_EXP && nsvc->remote_end_is_sgsn) { |
| 1206 | LOGP(DGPRS, LOGL_NOTICE, "Tns alive expired too often, " |
| 1207 | "re-starting RESET procedure\n"); |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1208 | rate_ctr_inc(&cfg->ctrg-> |
Jacob Erlbeck | bc55574 | 2013-10-18 14:34:55 +0200 | [diff] [blame] | 1209 | ctr[GBPROX_GLOB_CTR_RESTART_RESET_SGSN]); |
Harald Welte | e6599ee | 2012-06-17 12:25:53 +0800 | [diff] [blame] | 1210 | gprs_ns_nsip_connect(nsvc->nsi, &nsvc->ip.bts_addr, |
| 1211 | nsvc->nsei, nsvc->nsvci); |
Harald Welte | b778d2c | 2010-05-12 13:28:25 +0000 | [diff] [blame] | 1212 | } |
| 1213 | |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 1214 | if (!nsvc->remote_end_is_sgsn) { |
| 1215 | /* from BSS to SGSN */ |
Jacob Erlbeck | 5f1faa3 | 2014-08-21 10:01:30 +0200 | [diff] [blame] | 1216 | peer = gbproxy_peer_by_nsei(cfg, nsvc->nsei); |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 1217 | if (!peer) { |
| 1218 | LOGP(DGPRS, LOGL_NOTICE, "signal %u for unknown peer " |
| 1219 | "NSEI=%u/NSVCI=%u\n", signal, nsvc->nsei, |
| 1220 | nsvc->nsvci); |
| 1221 | return 0; |
| 1222 | } |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 1223 | switch (signal) { |
| 1224 | case S_NS_RESET: |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 1225 | case S_NS_BLOCK: |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 1226 | if (!peer->blocked) |
| 1227 | break; |
| 1228 | LOGP(DGPRS, LOGL_NOTICE, "Converting NS_RESET from " |
| 1229 | "NSEI=%u/NSVCI=%u into BSSGP_BVC_BLOCK to SGSN\n", |
| 1230 | nsvc->nsei, nsvc->nsvci); |
| 1231 | bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_BLOCK, nsvc->nsei, |
| 1232 | peer->bvci, 0); |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 1233 | break; |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 1234 | } |
| 1235 | } else { |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 1236 | /* Forward this message to all NS-VC to BSS */ |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1237 | struct gprs_ns_inst *nsi = cfg->nsi; |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 1238 | struct gprs_nsvc *next_nsvc; |
| 1239 | |
| 1240 | llist_for_each_entry(next_nsvc, &nsi->gprs_nsvcs, list) { |
| 1241 | if (next_nsvc->remote_end_is_sgsn) |
| 1242 | continue; |
| 1243 | |
| 1244 | /* Note that the following does not start the full |
| 1245 | * procedures including timer based retransmissions. */ |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 1246 | switch (signal) { |
| 1247 | case S_NS_RESET: |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 1248 | gprs_ns_tx_reset(next_nsvc, nssd->cause); |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 1249 | break; |
| 1250 | case S_NS_BLOCK: |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 1251 | gprs_ns_tx_block(next_nsvc, nssd->cause); |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 1252 | break; |
| 1253 | case S_NS_UNBLOCK: |
Jacob Erlbeck | e75fec6 | 2013-10-15 12:00:27 +0200 | [diff] [blame] | 1254 | gprs_ns_tx_unblock(next_nsvc); |
Harald Welte | 5e106d7 | 2011-02-06 16:33:29 +0100 | [diff] [blame] | 1255 | break; |
| 1256 | } |
Harald Welte | c1c1dd2 | 2010-05-11 06:34:24 +0200 | [diff] [blame] | 1257 | } |
| 1258 | } |
| 1259 | return 0; |
| 1260 | } |
| 1261 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1262 | void gbprox_reset(struct gbproxy_config *cfg) |
Jacob Erlbeck | 72b401f | 2013-10-24 12:48:55 +0200 | [diff] [blame] | 1263 | { |
Holger Hans Peter Freyther | 1ddd9e5 | 2014-08-04 11:35:32 +0200 | [diff] [blame] | 1264 | struct gbproxy_peer *peer, *tmp; |
Jacob Erlbeck | 72b401f | 2013-10-24 12:48:55 +0200 | [diff] [blame] | 1265 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1266 | 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] | 1267 | gbproxy_peer_free(peer); |
Jacob Erlbeck | 72b401f | 2013-10-24 12:48:55 +0200 | [diff] [blame] | 1268 | |
Holger Hans Peter Freyther | eece627 | 2014-08-04 15:42:36 +0200 | [diff] [blame] | 1269 | rate_ctr_group_free(cfg->ctrg); |
| 1270 | gbproxy_init_config(cfg); |
Jacob Erlbeck | 72b401f | 2013-10-24 12:48:55 +0200 | [diff] [blame] | 1271 | } |
| 1272 | |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 1273 | int gbproxy_init_config(struct gbproxy_config *cfg) |
Jacob Erlbeck | 4211d79 | 2013-10-24 12:48:23 +0200 | [diff] [blame] | 1274 | { |
Jacob Erlbeck | 0d37671 | 2014-08-11 19:12:24 +0200 | [diff] [blame] | 1275 | struct timespec tp; |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 1276 | INIT_LLIST_HEAD(&cfg->bts_peers); |
Holger Hans Peter Freyther | a7027a0 | 2014-08-04 11:19:56 +0200 | [diff] [blame] | 1277 | cfg->ctrg = rate_ctr_group_alloc(tall_bsc_ctx, &global_ctrg_desc, 0); |
Jacob Erlbeck | 0d37671 | 2014-08-11 19:12:24 +0200 | [diff] [blame] | 1278 | clock_gettime(CLOCK_REALTIME, &tp); |
| 1279 | cfg->bss_ptmsi_state = tp.tv_sec + tp.tv_nsec; |
| 1280 | cfg->sgsn_tlli_state = tp.tv_sec - tp.tv_nsec; |
Holger Hans Peter Freyther | 18739ea | 2014-08-04 11:10:09 +0200 | [diff] [blame] | 1281 | return 0; |
Jacob Erlbeck | 4211d79 | 2013-10-24 12:48:23 +0200 | [diff] [blame] | 1282 | } |