Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 1 | |
| 2 | /* BSC Multiplexer/NAT Utilities */ |
| 3 | |
| 4 | /* |
Holger Hans Peter Freyther | e188010 | 2011-04-23 23:31:31 +0200 | [diff] [blame] | 5 | * (C) 2010-2011 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 6 | * (C) 2010-2011 by On-Waves |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 10 | * it under the terms of the GNU Affero General Public License as published by |
| 11 | * the Free Software Foundation; either version 3 of the License, or |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * GNU Affero General Public License for more details. |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 18 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 19 | * You should have received a copy of the GNU Affero General Public License |
| 20 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <openbsc/bsc_nat.h> |
Holger Hans Peter Freyther | c2b31ed | 2010-07-31 05:17:17 +0800 | [diff] [blame] | 25 | #include <openbsc/bsc_nat_sccp.h> |
Holger Hans Peter Freyther | 20ee312 | 2010-07-05 14:39:44 +0800 | [diff] [blame] | 26 | #include <openbsc/bsc_msc.h> |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 27 | #include <openbsc/gsm_data.h> |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 28 | #include <openbsc/debug.h> |
Holger Hans Peter Freyther | a0df82d | 2010-04-01 08:21:33 +0200 | [diff] [blame] | 29 | #include <openbsc/ipaccess.h> |
Holger Hans Peter Freyther | 3e9a7f8 | 2010-10-12 23:21:54 +0200 | [diff] [blame] | 30 | #include <openbsc/vty.h> |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 31 | |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 32 | #include <osmocom/core/linuxlist.h> |
| 33 | #include <osmocom/core/talloc.h> |
Harald Welte | d36ff76 | 2011-03-23 18:26:56 +0100 | [diff] [blame] | 34 | #include <osmocom/gsm/gsm0808.h> |
Harald Welte | 4a88a49 | 2014-08-20 23:46:40 +0200 | [diff] [blame] | 35 | #include <osmocom/gsm/ipa.h> |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 36 | |
Harald Welte | d36ff76 | 2011-03-23 18:26:56 +0100 | [diff] [blame] | 37 | #include <osmocom/gsm/protocol/gsm_08_08.h> |
Holger Hans Peter Freyther | 9c20571 | 2011-05-27 17:14:15 +0200 | [diff] [blame] | 38 | #include <osmocom/gsm/protocol/gsm_04_11.h> |
Holger Hans Peter Freyther | 69d801e | 2010-06-15 20:13:33 +0800 | [diff] [blame] | 39 | |
Harald Welte | d5db12c | 2010-08-03 15:11:51 +0200 | [diff] [blame] | 40 | #include <osmocom/sccp/sccp.h> |
Holger Hans Peter Freyther | 23fe7be | 2010-03-30 10:45:48 +0200 | [diff] [blame] | 41 | |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 42 | #include <netinet/in.h> |
| 43 | #include <arpa/inet.h> |
Holger Hans Peter Freyther | 69cfa17 | 2010-10-13 20:37:13 +0200 | [diff] [blame] | 44 | #include <unistd.h> |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 45 | |
Holger Hans Peter Freyther | b2c38eb | 2010-06-17 18:16:00 +0800 | [diff] [blame] | 46 | static const struct rate_ctr_desc bsc_cfg_ctr_description[] = { |
Holger Hans Peter Freyther | 71d36b3 | 2010-06-17 18:31:18 +0800 | [diff] [blame] | 47 | [BCFG_CTR_SCCP_CONN] = { "sccp.conn", "SCCP Connections "}, |
| 48 | [BCFG_CTR_SCCP_CALLS] = { "sccp.calls", "SCCP Assignment Commands "}, |
| 49 | [BCFG_CTR_NET_RECONN] = { "net.reconnects", "Network reconnects "}, |
| 50 | [BCFG_CTR_DROPPED_SCCP] = { "dropped.sccp", "Dropped SCCP connections."}, |
| 51 | [BCFG_CTR_DROPPED_CALLS] = { "dropped.calls", "Dropped active calls. "}, |
Holger Hans Peter Freyther | ee88496 | 2010-09-25 17:58:22 +0800 | [diff] [blame] | 52 | [BCFG_CTR_REJECTED_CR] = { "rejected.cr", "Rejected CR due filter "}, |
| 53 | [BCFG_CTR_REJECTED_MSG] = { "rejected.msg", "Rejected MSG due filter "}, |
| 54 | [BCFG_CTR_ILL_PACKET] = { "rejected.ill", "Rejected due parse error "}, |
Holger Hans Peter Freyther | 463dc62 | 2010-10-03 19:41:42 +0800 | [diff] [blame] | 55 | [BCFG_CTR_CON_TYPE_LU] = { "conn.lu", "Conn Location Update "}, |
| 56 | [BCFG_CTR_CON_CMSERV_RQ] = { "conn.rq", "Conn CM Service Req "}, |
| 57 | [BCFG_CTR_CON_PAG_RESP] = { "conn.pag", "Conn Paging Response "}, |
Holger Hans Peter Freyther | 74dc303 | 2010-09-29 02:47:29 +0800 | [diff] [blame] | 58 | [BCFG_CTR_CON_SSA] = { "conn.ssa", "Conn USSD "}, |
Holger Hans Peter Freyther | 463dc62 | 2010-10-03 19:41:42 +0800 | [diff] [blame] | 59 | [BCFG_CTR_CON_OTHER] = { "conn.other", "Conn Other "}, |
Holger Hans Peter Freyther | b2c38eb | 2010-06-17 18:16:00 +0800 | [diff] [blame] | 60 | }; |
| 61 | |
| 62 | static const struct rate_ctr_group_desc bsc_cfg_ctrg_desc = { |
| 63 | .group_name_prefix = "nat.bsc", |
| 64 | .group_description = "NAT BSC Statistics", |
| 65 | .num_ctr = ARRAY_SIZE(bsc_cfg_ctr_description), |
| 66 | .ctr_desc = bsc_cfg_ctr_description, |
| 67 | }; |
| 68 | |
Holger Hans Peter Freyther | 2f1a984 | 2010-09-25 06:14:52 +0800 | [diff] [blame] | 69 | static const struct rate_ctr_desc acc_list_ctr_description[] = { |
| 70 | [ACC_LIST_BSC_FILTER] = { "access-list.bsc-filter", "Rejected by rule for BSC"}, |
| 71 | [ACC_LIST_NAT_FILTER] = { "access-list.nat-filter", "Rejected by rule for NAT"}, |
| 72 | }; |
| 73 | |
| 74 | static const struct rate_ctr_group_desc bsc_cfg_acc_list_desc = { |
| 75 | .group_name_prefix = "nat.filter", |
| 76 | .group_description = "NAT Access-List Statistics", |
| 77 | .num_ctr = ARRAY_SIZE(acc_list_ctr_description), |
| 78 | .ctr_desc = acc_list_ctr_description, |
| 79 | }; |
| 80 | |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 81 | struct bsc_nat *bsc_nat_alloc(void) |
| 82 | { |
| 83 | struct bsc_nat *nat = talloc_zero(tall_bsc_ctx, struct bsc_nat); |
| 84 | if (!nat) |
| 85 | return NULL; |
| 86 | |
Holger Hans Peter Freyther | e188010 | 2011-04-23 23:31:31 +0200 | [diff] [blame] | 87 | nat->main_dest = talloc_zero(nat, struct bsc_msc_dest); |
| 88 | if (!nat->main_dest) { |
| 89 | talloc_free(nat); |
| 90 | return NULL; |
| 91 | } |
| 92 | |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 93 | INIT_LLIST_HEAD(&nat->sccp_connections); |
| 94 | INIT_LLIST_HEAD(&nat->bsc_connections); |
Holger Hans Peter Freyther | 474698a | 2011-05-02 16:50:36 +0200 | [diff] [blame] | 95 | INIT_LLIST_HEAD(&nat->paging_groups); |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 96 | INIT_LLIST_HEAD(&nat->bsc_configs); |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 97 | INIT_LLIST_HEAD(&nat->access_lists); |
Holger Hans Peter Freyther | e188010 | 2011-04-23 23:31:31 +0200 | [diff] [blame] | 98 | INIT_LLIST_HEAD(&nat->dests); |
Holger Hans Peter Freyther | ad75eab | 2011-05-27 12:38:58 +0200 | [diff] [blame] | 99 | INIT_LLIST_HEAD(&nat->num_rewr); |
Holger Hans Peter Freyther | 67e423c | 2013-06-25 15:38:31 +0200 | [diff] [blame] | 100 | INIT_LLIST_HEAD(&nat->num_rewr_post); |
Holger Hans Peter Freyther | 9c20571 | 2011-05-27 17:14:15 +0200 | [diff] [blame] | 101 | INIT_LLIST_HEAD(&nat->smsc_rewr); |
Holger Hans Peter Freyther | acc4031 | 2011-05-27 19:21:24 +0200 | [diff] [blame] | 102 | INIT_LLIST_HEAD(&nat->tpdest_match); |
Holger Hans Peter Freyther | 68368dd | 2012-01-10 22:39:07 +0100 | [diff] [blame] | 103 | INIT_LLIST_HEAD(&nat->sms_clear_tp_srr); |
Holger Hans Peter Freyther | 8e60f62 | 2012-01-18 20:00:28 +0100 | [diff] [blame] | 104 | INIT_LLIST_HEAD(&nat->sms_num_rewr); |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 105 | |
Pablo Neira Ayuso | dfb342c | 2011-05-06 12:13:10 +0200 | [diff] [blame] | 106 | nat->stats.sccp.conn = osmo_counter_alloc("nat.sccp.conn"); |
| 107 | nat->stats.sccp.calls = osmo_counter_alloc("nat.sccp.calls"); |
| 108 | nat->stats.bsc.reconn = osmo_counter_alloc("nat.bsc.conn"); |
| 109 | nat->stats.bsc.auth_fail = osmo_counter_alloc("nat.bsc.auth_fail"); |
| 110 | nat->stats.msc.reconn = osmo_counter_alloc("nat.msc.conn"); |
| 111 | nat->stats.ussd.reconn = osmo_counter_alloc("nat.ussd.conn"); |
Holger Hans Peter Freyther | da35a8d | 2010-05-05 16:57:38 +0800 | [diff] [blame] | 112 | nat->auth_timeout = 2; |
| 113 | nat->ping_timeout = 20; |
| 114 | nat->pong_timeout = 5; |
Holger Hans Peter Freyther | e188010 | 2011-04-23 23:31:31 +0200 | [diff] [blame] | 115 | |
| 116 | llist_add(&nat->main_dest->list, &nat->dests); |
| 117 | nat->main_dest->ip = talloc_strdup(nat, "127.0.0.1"); |
| 118 | nat->main_dest->port = 5000; |
| 119 | |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 120 | return nat; |
| 121 | } |
| 122 | |
Holger Hans Peter Freyther | a88742c | 2010-06-15 18:51:04 +0800 | [diff] [blame] | 123 | void bsc_nat_set_msc_ip(struct bsc_nat *nat, const char *ip) |
| 124 | { |
Holger Hans Peter Freyther | e188010 | 2011-04-23 23:31:31 +0200 | [diff] [blame] | 125 | bsc_replace_string(nat, &nat->main_dest->ip, ip); |
Holger Hans Peter Freyther | a88742c | 2010-06-15 18:51:04 +0800 | [diff] [blame] | 126 | } |
| 127 | |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 128 | struct bsc_connection *bsc_connection_alloc(struct bsc_nat *nat) |
| 129 | { |
| 130 | struct bsc_connection *con = talloc_zero(nat, struct bsc_connection); |
| 131 | if (!con) |
| 132 | return NULL; |
| 133 | |
Holger Hans Peter Freyther | f8048d9 | 2010-03-29 15:14:15 +0200 | [diff] [blame] | 134 | con->nat = nat; |
Pablo Neira Ayuso | e1273b1 | 2011-05-06 12:09:47 +0200 | [diff] [blame] | 135 | osmo_wqueue_init(&con->write_queue, 100); |
Daniel Willmann | a86bc39 | 2011-02-18 14:32:56 +0100 | [diff] [blame] | 136 | INIT_LLIST_HEAD(&con->cmd_pending); |
Holger Hans Peter Freyther | 462b7d7 | 2012-10-24 21:53:40 +0200 | [diff] [blame] | 137 | INIT_LLIST_HEAD(&con->pending_dlcx); |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 138 | return con; |
| 139 | } |
| 140 | |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 141 | struct bsc_config *bsc_config_alloc(struct bsc_nat *nat, const char *token) |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 142 | { |
| 143 | struct bsc_config *conf = talloc_zero(nat, struct bsc_config); |
| 144 | if (!conf) |
| 145 | return NULL; |
| 146 | |
| 147 | conf->token = talloc_strdup(conf, token); |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 148 | conf->nr = nat->num_bsc; |
| 149 | conf->nat = nat; |
Holger Hans Peter Freyther | 9ec030d | 2011-02-27 11:04:27 +0100 | [diff] [blame] | 150 | conf->max_endpoints = 32; |
Holger Hans Peter Freyther | 474698a | 2011-05-02 16:50:36 +0200 | [diff] [blame] | 151 | conf->paging_group = PAGIN_GROUP_UNASSIGNED; |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 152 | |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 153 | INIT_LLIST_HEAD(&conf->lac_list); |
| 154 | |
Holger Hans Peter Freyther | d1278c1 | 2010-04-16 16:52:20 +0200 | [diff] [blame] | 155 | llist_add_tail(&conf->entry, &nat->bsc_configs); |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 156 | ++nat->num_bsc; |
| 157 | |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 158 | conf->stats.ctrg = rate_ctr_group_alloc(conf, &bsc_cfg_ctrg_desc, conf->nr); |
Holger Hans Peter Freyther | b2c38eb | 2010-06-17 18:16:00 +0800 | [diff] [blame] | 159 | if (!conf->stats.ctrg) { |
| 160 | talloc_free(conf); |
| 161 | return NULL; |
| 162 | } |
Holger Hans Peter Freyther | d470286 | 2010-04-12 12:17:09 +0200 | [diff] [blame] | 163 | |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 164 | return conf; |
| 165 | } |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 166 | |
Holger Hans Peter Freyther | 9212d9d | 2011-02-27 11:18:41 +0100 | [diff] [blame] | 167 | void bsc_config_free(struct bsc_config *cfg) |
| 168 | { |
| 169 | rate_ctr_group_free(cfg->stats.ctrg); |
| 170 | } |
| 171 | |
Holger Hans Peter Freyther | 6860c44 | 2011-05-02 19:16:13 +0200 | [diff] [blame] | 172 | static void _add_lac(void *ctx, struct llist_head *list, int _lac) |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 173 | { |
| 174 | struct bsc_lac_entry *lac; |
| 175 | |
Holger Hans Peter Freyther | 6860c44 | 2011-05-02 19:16:13 +0200 | [diff] [blame] | 176 | llist_for_each_entry(lac, list, entry) |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 177 | if (lac->lac == _lac) |
| 178 | return; |
| 179 | |
Holger Hans Peter Freyther | 6860c44 | 2011-05-02 19:16:13 +0200 | [diff] [blame] | 180 | lac = talloc_zero(ctx, struct bsc_lac_entry); |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 181 | if (!lac) { |
| 182 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate.\n"); |
| 183 | return; |
| 184 | } |
| 185 | |
| 186 | lac->lac = _lac; |
Holger Hans Peter Freyther | 6860c44 | 2011-05-02 19:16:13 +0200 | [diff] [blame] | 187 | llist_add_tail(&lac->entry, list); |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 188 | } |
| 189 | |
Holger Hans Peter Freyther | 6860c44 | 2011-05-02 19:16:13 +0200 | [diff] [blame] | 190 | static void _del_lac(struct llist_head *list, int _lac) |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 191 | { |
| 192 | struct bsc_lac_entry *lac; |
| 193 | |
Holger Hans Peter Freyther | 6860c44 | 2011-05-02 19:16:13 +0200 | [diff] [blame] | 194 | llist_for_each_entry(lac, list, entry) |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 195 | if (lac->lac == _lac) { |
| 196 | llist_del(&lac->entry); |
| 197 | talloc_free(lac); |
| 198 | return; |
| 199 | } |
| 200 | } |
| 201 | |
Holger Hans Peter Freyther | 6860c44 | 2011-05-02 19:16:13 +0200 | [diff] [blame] | 202 | void bsc_config_add_lac(struct bsc_config *cfg, int _lac) |
| 203 | { |
| 204 | _add_lac(cfg, &cfg->lac_list, _lac); |
| 205 | } |
| 206 | |
| 207 | void bsc_config_del_lac(struct bsc_config *cfg, int _lac) |
| 208 | { |
| 209 | _del_lac(&cfg->lac_list, _lac); |
| 210 | } |
| 211 | |
| 212 | struct bsc_nat_paging_group *bsc_nat_paging_group_create(struct bsc_nat *nat, int group) |
| 213 | { |
| 214 | struct bsc_nat_paging_group *pgroup; |
| 215 | |
| 216 | pgroup = talloc_zero(nat, struct bsc_nat_paging_group); |
| 217 | if (!pgroup) { |
| 218 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate a paging group.\n"); |
| 219 | return NULL; |
| 220 | } |
| 221 | |
| 222 | pgroup->nr = group; |
| 223 | INIT_LLIST_HEAD(&pgroup->lists); |
| 224 | llist_add_tail(&pgroup->entry, &nat->paging_groups); |
| 225 | return pgroup; |
| 226 | } |
| 227 | |
| 228 | void bsc_nat_paging_group_delete(struct bsc_nat_paging_group *pgroup) |
| 229 | { |
| 230 | llist_del(&pgroup->entry); |
| 231 | talloc_free(pgroup); |
| 232 | } |
| 233 | |
| 234 | struct bsc_nat_paging_group *bsc_nat_paging_group_num(struct bsc_nat *nat, int group) |
Holger Hans Peter Freyther | 474698a | 2011-05-02 16:50:36 +0200 | [diff] [blame] | 235 | { |
| 236 | struct bsc_nat_paging_group *pgroup; |
| 237 | |
| 238 | llist_for_each_entry(pgroup, &nat->paging_groups, entry) |
| 239 | if (pgroup->nr == group) |
| 240 | return pgroup; |
| 241 | |
| 242 | return NULL; |
| 243 | } |
| 244 | |
Holger Hans Peter Freyther | 6860c44 | 2011-05-02 19:16:13 +0200 | [diff] [blame] | 245 | void bsc_nat_paging_group_add_lac(struct bsc_nat_paging_group *pgroup, int lac) |
| 246 | { |
| 247 | _add_lac(pgroup, &pgroup->lists, lac); |
| 248 | } |
| 249 | |
| 250 | void bsc_nat_paging_group_del_lac(struct bsc_nat_paging_group *pgroup, int lac) |
| 251 | { |
| 252 | _del_lac(&pgroup->lists, lac); |
| 253 | } |
| 254 | |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 255 | int bsc_config_handles_lac(struct bsc_config *cfg, int lac_nr) |
| 256 | { |
Holger Hans Peter Freyther | 474698a | 2011-05-02 16:50:36 +0200 | [diff] [blame] | 257 | struct bsc_nat_paging_group *pgroup; |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 258 | struct bsc_lac_entry *entry; |
| 259 | |
| 260 | llist_for_each_entry(entry, &cfg->lac_list, entry) |
| 261 | if (entry->lac == lac_nr) |
| 262 | return 1; |
| 263 | |
Holger Hans Peter Freyther | 474698a | 2011-05-02 16:50:36 +0200 | [diff] [blame] | 264 | /* now lookup the paging group */ |
| 265 | pgroup = bsc_nat_paging_group_num(cfg->nat, cfg->paging_group); |
| 266 | if (!pgroup) |
| 267 | return 0; |
| 268 | |
| 269 | llist_for_each_entry(entry, &pgroup->lists, entry) |
| 270 | if (entry->lac == lac_nr) |
| 271 | return 1; |
| 272 | |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 273 | return 0; |
| 274 | } |
| 275 | |
Holger Hans Peter Freyther | c279e39 | 2013-04-16 09:53:13 +0200 | [diff] [blame] | 276 | void sccp_connection_destroy(struct nat_sccp_connection *conn) |
Holger Hans Peter Freyther | 23fe7be | 2010-03-30 10:45:48 +0200 | [diff] [blame] | 277 | { |
| 278 | LOGP(DNAT, LOGL_DEBUG, "Destroy 0x%x <-> 0x%x mapping for con %p\n", |
| 279 | sccp_src_ref_to_int(&conn->real_ref), |
| 280 | sccp_src_ref_to_int(&conn->patched_ref), conn->bsc); |
Holger Hans Peter Freyther | 7b7eef6 | 2010-04-22 12:08:17 +0800 | [diff] [blame] | 281 | bsc_mgcp_dlcx(conn); |
Holger Hans Peter Freyther | 23fe7be | 2010-03-30 10:45:48 +0200 | [diff] [blame] | 282 | llist_del(&conn->list_entry); |
| 283 | talloc_free(conn); |
| 284 | } |
| 285 | |
Holger Hans Peter Freyther | 1ffe98c | 2011-05-02 16:20:32 +0200 | [diff] [blame] | 286 | |
| 287 | int bsc_nat_find_paging(struct msgb *msg, |
| 288 | const uint8_t **out_data, int *out_leng) |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 289 | { |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 290 | int data_length; |
Holger Hans Peter Freyther | dbd16fe | 2010-07-23 19:08:55 +0800 | [diff] [blame] | 291 | const uint8_t *data; |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 292 | struct tlv_parsed tp; |
Holger Hans Peter Freyther | 7a77369 | 2010-04-18 02:41:20 +0800 | [diff] [blame] | 293 | |
Holger Hans Peter Freyther | e9be517 | 2010-03-30 06:51:23 +0200 | [diff] [blame] | 294 | if (!msg->l3h || msgb_l3len(msg) < 3) { |
| 295 | LOGP(DNAT, LOGL_ERROR, "Paging message is too short.\n"); |
Holger Hans Peter Freyther | 1ffe98c | 2011-05-02 16:20:32 +0200 | [diff] [blame] | 296 | return -1; |
Holger Hans Peter Freyther | e9be517 | 2010-03-30 06:51:23 +0200 | [diff] [blame] | 297 | } |
| 298 | |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 299 | tlv_parse(&tp, gsm0808_att_tlvdef(), msg->l3h + 3, msgb_l3len(msg) - 3, 0, 0); |
| 300 | if (!TLVP_PRESENT(&tp, GSM0808_IE_CELL_IDENTIFIER_LIST)) { |
| 301 | LOGP(DNAT, LOGL_ERROR, "No CellIdentifier List inside paging msg.\n"); |
Holger Hans Peter Freyther | 1ffe98c | 2011-05-02 16:20:32 +0200 | [diff] [blame] | 302 | return -2; |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 303 | } |
| 304 | |
| 305 | data_length = TLVP_LEN(&tp, GSM0808_IE_CELL_IDENTIFIER_LIST); |
| 306 | data = TLVP_VAL(&tp, GSM0808_IE_CELL_IDENTIFIER_LIST); |
Holger Hans Peter Freyther | a4376ad | 2010-04-21 18:47:24 +0800 | [diff] [blame] | 307 | |
| 308 | /* No need to try a different BSS */ |
| 309 | if (data[0] == CELL_IDENT_BSS) { |
Holger Hans Peter Freyther | 1ffe98c | 2011-05-02 16:20:32 +0200 | [diff] [blame] | 310 | return -3; |
Holger Hans Peter Freyther | a4376ad | 2010-04-21 18:47:24 +0800 | [diff] [blame] | 311 | } else if (data[0] != CELL_IDENT_LAC) { |
Holger Hans Peter Freyther | 530c4b1 | 2010-04-06 10:25:40 +0200 | [diff] [blame] | 312 | LOGP(DNAT, LOGL_ERROR, "Unhandled cell ident discrminator: %d\n", data[0]); |
Holger Hans Peter Freyther | 1ffe98c | 2011-05-02 16:20:32 +0200 | [diff] [blame] | 313 | return -4; |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 314 | } |
| 315 | |
Holger Hans Peter Freyther | 1ffe98c | 2011-05-02 16:20:32 +0200 | [diff] [blame] | 316 | *out_data = &data[1]; |
| 317 | *out_leng = data_length - 1; |
| 318 | return 0; |
Holger Hans Peter Freyther | a0df82d | 2010-04-01 08:21:33 +0200 | [diff] [blame] | 319 | } |
| 320 | |
Holger Hans Peter Freyther | dbd16fe | 2010-07-23 19:08:55 +0800 | [diff] [blame] | 321 | int bsc_write_mgcp(struct bsc_connection *bsc, const uint8_t *data, unsigned int length) |
Holger Hans Peter Freyther | a0df82d | 2010-04-01 08:21:33 +0200 | [diff] [blame] | 322 | { |
| 323 | struct msgb *msg; |
| 324 | |
| 325 | if (length > 4096 - 128) { |
Pablo Neira Ayuso | ed5cacb | 2011-08-17 22:44:07 +0200 | [diff] [blame] | 326 | LOGP(DLINP, LOGL_ERROR, "Can not send message of that size.\n"); |
Holger Hans Peter Freyther | a0df82d | 2010-04-01 08:21:33 +0200 | [diff] [blame] | 327 | return -1; |
| 328 | } |
| 329 | |
| 330 | msg = msgb_alloc_headroom(4096, 128, "to-bsc"); |
| 331 | if (!msg) { |
Pablo Neira Ayuso | ed5cacb | 2011-08-17 22:44:07 +0200 | [diff] [blame] | 332 | LOGP(DLINP, LOGL_ERROR, "Failed to allocate memory for BSC msg.\n"); |
Holger Hans Peter Freyther | a0df82d | 2010-04-01 08:21:33 +0200 | [diff] [blame] | 333 | return -1; |
| 334 | } |
| 335 | |
| 336 | /* copy the data */ |
| 337 | msg->l3h = msgb_put(msg, length); |
| 338 | memcpy(msg->l3h, data, length); |
| 339 | |
Holger Hans Peter Freyther | 368a0a7 | 2011-01-07 16:54:46 +0100 | [diff] [blame] | 340 | return bsc_write(bsc, msg, IPAC_PROTO_MGCP_OLD); |
Holger Hans Peter Freyther | a0df82d | 2010-04-01 08:21:33 +0200 | [diff] [blame] | 341 | } |
| 342 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 343 | int bsc_write(struct bsc_connection *bsc, struct msgb *msg, int proto) |
Holger Hans Peter Freyther | a0df82d | 2010-04-01 08:21:33 +0200 | [diff] [blame] | 344 | { |
Holger Hans Peter Freyther | 4d44fc5 | 2010-10-13 17:56:22 +0200 | [diff] [blame] | 345 | return bsc_do_write(&bsc->write_queue, msg, proto); |
| 346 | } |
| 347 | |
Pablo Neira Ayuso | e1273b1 | 2011-05-06 12:09:47 +0200 | [diff] [blame] | 348 | int bsc_do_write(struct osmo_wqueue *queue, struct msgb *msg, int proto) |
Holger Hans Peter Freyther | 4d44fc5 | 2010-10-13 17:56:22 +0200 | [diff] [blame] | 349 | { |
Holger Hans Peter Freyther | a0df82d | 2010-04-01 08:21:33 +0200 | [diff] [blame] | 350 | /* prepend the header */ |
Harald Welte | 4a88a49 | 2014-08-20 23:46:40 +0200 | [diff] [blame] | 351 | ipa_prepend_header(msg, proto); |
Holger Hans Peter Freyther | 7e8da13 | 2010-10-16 17:33:46 +0200 | [diff] [blame] | 352 | return bsc_write_msg(queue, msg); |
| 353 | } |
Holger Hans Peter Freyther | a0df82d | 2010-04-01 08:21:33 +0200 | [diff] [blame] | 354 | |
Pablo Neira Ayuso | e1273b1 | 2011-05-06 12:09:47 +0200 | [diff] [blame] | 355 | int bsc_write_msg(struct osmo_wqueue *queue, struct msgb *msg) |
Holger Hans Peter Freyther | 7e8da13 | 2010-10-16 17:33:46 +0200 | [diff] [blame] | 356 | { |
Pablo Neira Ayuso | e1273b1 | 2011-05-06 12:09:47 +0200 | [diff] [blame] | 357 | if (osmo_wqueue_enqueue(queue, msg) != 0) { |
Pablo Neira Ayuso | ed5cacb | 2011-08-17 22:44:07 +0200 | [diff] [blame] | 358 | LOGP(DLINP, LOGL_ERROR, "Failed to enqueue the write.\n"); |
Holger Hans Peter Freyther | a0df82d | 2010-04-01 08:21:33 +0200 | [diff] [blame] | 359 | msgb_free(msg); |
| 360 | return -1; |
| 361 | } |
| 362 | |
| 363 | return 0; |
| 364 | } |
Holger Hans Peter Freyther | b4af5c9 | 2010-05-14 03:39:56 +0800 | [diff] [blame] | 365 | |
Holger Hans Peter Freyther | c1cac1e | 2010-10-11 09:50:31 +0200 | [diff] [blame] | 366 | int bsc_nat_lst_check_allow(struct bsc_nat_acc_lst *lst, const char *mi_string) |
Holger Hans Peter Freyther | d77c817 | 2010-06-08 10:53:39 +0800 | [diff] [blame] | 367 | { |
| 368 | struct bsc_nat_acc_lst_entry *entry; |
| 369 | |
| 370 | llist_for_each_entry(entry, &lst->fltr_list, list) { |
| 371 | if (!entry->imsi_allow) |
| 372 | continue; |
| 373 | if (regexec(&entry->imsi_allow_re, mi_string, 0, NULL, 0) == 0) |
| 374 | return 0; |
| 375 | } |
| 376 | |
| 377 | return 1; |
| 378 | } |
| 379 | |
Holger Hans Peter Freyther | a396757 | 2010-09-29 02:30:50 +0800 | [diff] [blame] | 380 | struct gsm48_hdr *bsc_unpack_dtap(struct bsc_nat_parsed *parsed, |
| 381 | struct msgb *msg, uint32_t *len) |
| 382 | { |
| 383 | /* gsm_type is actually the size of the dtap */ |
| 384 | *len = parsed->gsm_type; |
| 385 | if (*len < msgb_l3len(msg) - 3) { |
| 386 | LOGP(DNAT, LOGL_ERROR, "Not enough space for DTAP.\n"); |
| 387 | return NULL; |
| 388 | } |
| 389 | |
Holger Hans Peter Freyther | c2c0ea7 | 2012-01-10 22:27:43 +0100 | [diff] [blame] | 390 | if (msgb_l3len(msg) - 3 < msg->l3h[2]) { |
| 391 | LOGP(DNAT, LOGL_ERROR, |
| 392 | "GSM48 payload does not fit: %d %d\n", |
| 393 | msg->l3h[2], msgb_l3len(msg) - 3); |
Holger Hans Peter Freyther | a396757 | 2010-09-29 02:30:50 +0800 | [diff] [blame] | 394 | return NULL; |
| 395 | } |
| 396 | |
| 397 | msg->l4h = &msg->l3h[3]; |
| 398 | return (struct gsm48_hdr *) msg->l4h; |
| 399 | } |
| 400 | |
Holger Hans Peter Freyther | 234d312 | 2010-05-16 02:06:11 +0800 | [diff] [blame] | 401 | static const char *con_types [] = { |
| 402 | [NAT_CON_TYPE_NONE] = "n/a", |
| 403 | [NAT_CON_TYPE_LU] = "Location Update", |
| 404 | [NAT_CON_TYPE_CM_SERV_REQ] = "CM Serv Req", |
| 405 | [NAT_CON_TYPE_PAG_RESP] = "Paging Response", |
Holger Hans Peter Freyther | 74dc303 | 2010-09-29 02:47:29 +0800 | [diff] [blame] | 406 | [NAT_CON_TYPE_SSA] = "Supplementar Service Activation", |
Holger Hans Peter Freyther | b71c23b | 2010-05-16 20:43:52 +0800 | [diff] [blame] | 407 | [NAT_CON_TYPE_LOCAL_REJECT] = "Local Reject", |
Holger Hans Peter Freyther | 234d312 | 2010-05-16 02:06:11 +0800 | [diff] [blame] | 408 | [NAT_CON_TYPE_OTHER] = "Other", |
| 409 | }; |
| 410 | |
| 411 | const char *bsc_con_type_to_string(int type) |
| 412 | { |
| 413 | return con_types[type]; |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 414 | } |
| 415 | |
Holger Hans Peter Freyther | 29c6703 | 2010-06-08 10:14:44 +0800 | [diff] [blame] | 416 | struct bsc_nat_acc_lst *bsc_nat_acc_lst_find(struct bsc_nat *nat, const char *name) |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 417 | { |
Holger Hans Peter Freyther | 29c6703 | 2010-06-08 10:14:44 +0800 | [diff] [blame] | 418 | struct bsc_nat_acc_lst *lst; |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 419 | |
| 420 | if (!name) |
| 421 | return NULL; |
| 422 | |
| 423 | llist_for_each_entry(lst, &nat->access_lists, list) |
| 424 | if (strcmp(lst->name, name) == 0) |
| 425 | return lst; |
| 426 | |
| 427 | return NULL; |
| 428 | } |
| 429 | |
Holger Hans Peter Freyther | 29c6703 | 2010-06-08 10:14:44 +0800 | [diff] [blame] | 430 | struct bsc_nat_acc_lst *bsc_nat_acc_lst_get(struct bsc_nat *nat, const char *name) |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 431 | { |
Holger Hans Peter Freyther | 29c6703 | 2010-06-08 10:14:44 +0800 | [diff] [blame] | 432 | struct bsc_nat_acc_lst *lst; |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 433 | |
Holger Hans Peter Freyther | 29c6703 | 2010-06-08 10:14:44 +0800 | [diff] [blame] | 434 | lst = bsc_nat_acc_lst_find(nat, name); |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 435 | if (lst) |
| 436 | return lst; |
| 437 | |
Holger Hans Peter Freyther | 29c6703 | 2010-06-08 10:14:44 +0800 | [diff] [blame] | 438 | lst = talloc_zero(nat, struct bsc_nat_acc_lst); |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 439 | if (!lst) { |
| 440 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate access list"); |
| 441 | return NULL; |
| 442 | } |
| 443 | |
Holger Hans Peter Freyther | 2f1a984 | 2010-09-25 06:14:52 +0800 | [diff] [blame] | 444 | /* TODO: get the index right */ |
| 445 | lst->stats = rate_ctr_group_alloc(lst, &bsc_cfg_acc_list_desc, 0); |
| 446 | if (!lst->stats) { |
| 447 | talloc_free(lst); |
| 448 | return NULL; |
| 449 | } |
| 450 | |
Holger Hans Peter Freyther | d77c817 | 2010-06-08 10:53:39 +0800 | [diff] [blame] | 451 | INIT_LLIST_HEAD(&lst->fltr_list); |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 452 | lst->name = talloc_strdup(lst, name); |
Holger Hans Peter Freyther | 26c3a35 | 2010-06-08 11:00:09 +0800 | [diff] [blame] | 453 | llist_add_tail(&lst->list, &nat->access_lists); |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 454 | return lst; |
Holger Hans Peter Freyther | e4900a0 | 2010-06-03 01:44:05 +0800 | [diff] [blame] | 455 | } |
| 456 | |
Holger Hans Peter Freyther | 29c6703 | 2010-06-08 10:14:44 +0800 | [diff] [blame] | 457 | void bsc_nat_acc_lst_delete(struct bsc_nat_acc_lst *lst) |
Holger Hans Peter Freyther | e4900a0 | 2010-06-03 01:44:05 +0800 | [diff] [blame] | 458 | { |
| 459 | llist_del(&lst->list); |
Holger Hans Peter Freyther | 2f1a984 | 2010-09-25 06:14:52 +0800 | [diff] [blame] | 460 | rate_ctr_group_free(lst->stats); |
Holger Hans Peter Freyther | e4900a0 | 2010-06-03 01:44:05 +0800 | [diff] [blame] | 461 | talloc_free(lst); |
Holger Hans Peter Freyther | d77c817 | 2010-06-08 10:53:39 +0800 | [diff] [blame] | 462 | } |
| 463 | |
| 464 | struct bsc_nat_acc_lst_entry *bsc_nat_acc_lst_entry_create(struct bsc_nat_acc_lst *lst) |
| 465 | { |
| 466 | struct bsc_nat_acc_lst_entry *entry; |
| 467 | |
| 468 | entry = talloc_zero(lst, struct bsc_nat_acc_lst_entry); |
| 469 | if (!entry) |
| 470 | return NULL; |
| 471 | |
Holger Hans Peter Freyther | 415cd2e | 2014-01-20 09:55:46 +0100 | [diff] [blame] | 472 | entry->cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED; |
| 473 | entry->lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED; |
Holger Hans Peter Freyther | 26c3a35 | 2010-06-08 11:00:09 +0800 | [diff] [blame] | 474 | llist_add_tail(&entry->list, &lst->fltr_list); |
Holger Hans Peter Freyther | d77c817 | 2010-06-08 10:53:39 +0800 | [diff] [blame] | 475 | return entry; |
Holger Hans Peter Freyther | b2c38eb | 2010-06-17 18:16:00 +0800 | [diff] [blame] | 476 | } |
Holger Hans Peter Freyther | 20ee312 | 2010-07-05 14:39:44 +0800 | [diff] [blame] | 477 | |
| 478 | int bsc_nat_msc_is_connected(struct bsc_nat *nat) |
| 479 | { |
| 480 | return nat->msc_con->is_connected; |
| 481 | } |
Holger Hans Peter Freyther | 463dc62 | 2010-10-03 19:41:42 +0800 | [diff] [blame] | 482 | |
| 483 | static const int con_to_ctr[] = { |
| 484 | [NAT_CON_TYPE_NONE] = -1, |
| 485 | [NAT_CON_TYPE_LU] = BCFG_CTR_CON_TYPE_LU, |
| 486 | [NAT_CON_TYPE_CM_SERV_REQ] = BCFG_CTR_CON_CMSERV_RQ, |
| 487 | [NAT_CON_TYPE_PAG_RESP] = BCFG_CTR_CON_PAG_RESP, |
Holger Hans Peter Freyther | 74dc303 | 2010-09-29 02:47:29 +0800 | [diff] [blame] | 488 | [NAT_CON_TYPE_SSA] = BCFG_CTR_CON_SSA, |
Holger Hans Peter Freyther | 463dc62 | 2010-10-03 19:41:42 +0800 | [diff] [blame] | 489 | [NAT_CON_TYPE_LOCAL_REJECT] = -1, |
| 490 | [NAT_CON_TYPE_OTHER] = BCFG_CTR_CON_OTHER, |
| 491 | }; |
| 492 | |
Holger Hans Peter Freyther | c279e39 | 2013-04-16 09:53:13 +0200 | [diff] [blame] | 493 | int bsc_conn_type_to_ctr(struct nat_sccp_connection *conn) |
Holger Hans Peter Freyther | 463dc62 | 2010-10-03 19:41:42 +0800 | [diff] [blame] | 494 | { |
| 495 | return con_to_ctr[conn->con_type]; |
| 496 | } |
Holger Hans Peter Freyther | 69cfa17 | 2010-10-13 20:37:13 +0200 | [diff] [blame] | 497 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 498 | int bsc_write_cb(struct osmo_fd *bfd, struct msgb *msg) |
Holger Hans Peter Freyther | 69cfa17 | 2010-10-13 20:37:13 +0200 | [diff] [blame] | 499 | { |
| 500 | int rc; |
| 501 | |
| 502 | rc = write(bfd->fd, msg->data, msg->len); |
| 503 | if (rc != msg->len) |
| 504 | LOGP(DNAT, LOGL_ERROR, "Failed to write message to the BSC.\n"); |
| 505 | |
| 506 | return rc; |
| 507 | } |
| 508 | |
Holger Hans Peter Freyther | b2b291d | 2013-04-16 13:23:43 +0200 | [diff] [blame] | 509 | static void extract_lac(const uint8_t *data, uint16_t *lac, uint16_t *ci) |
| 510 | { |
| 511 | memcpy(lac, &data[0], sizeof(*lac)); |
| 512 | memcpy(ci, &data[2], sizeof(*ci)); |
| 513 | |
| 514 | *lac = ntohs(*lac); |
| 515 | *ci = ntohs(*ci); |
| 516 | } |
| 517 | |
| 518 | int bsc_nat_extract_lac(struct bsc_connection *bsc, |
| 519 | struct nat_sccp_connection *con, |
| 520 | struct bsc_nat_parsed *parsed, struct msgb *msg) |
| 521 | { |
| 522 | int data_length; |
| 523 | const uint8_t *data; |
| 524 | struct tlv_parsed tp; |
| 525 | uint16_t lac, ci; |
| 526 | |
| 527 | if (parsed->gsm_type != BSS_MAP_MSG_COMPLETE_LAYER_3) { |
| 528 | LOGP(DNAT, LOGL_ERROR, "Can only extract LAC from Complete Layer3\n"); |
| 529 | return -1; |
| 530 | } |
| 531 | |
| 532 | if (!msg->l3h || msgb_l3len(msg) < 3) { |
| 533 | LOGP(DNAT, LOGL_ERROR, "Complete Layer3 mssage is too short.\n"); |
| 534 | return -1; |
| 535 | } |
| 536 | |
| 537 | tlv_parse(&tp, gsm0808_att_tlvdef(), msg->l3h + 3, msgb_l3len(msg) - 3, 0, 0); |
| 538 | if (!TLVP_PRESENT(&tp, GSM0808_IE_CELL_IDENTIFIER)) { |
| 539 | LOGP(DNAT, LOGL_ERROR, "No CellIdentifier List inside paging msg.\n"); |
| 540 | return -2; |
| 541 | } |
| 542 | |
| 543 | data_length = TLVP_LEN(&tp, GSM0808_IE_CELL_IDENTIFIER); |
| 544 | data = TLVP_VAL(&tp, GSM0808_IE_CELL_IDENTIFIER); |
| 545 | |
| 546 | /* Attemt to get the LAC/CI from it */ |
| 547 | if (data[0] == CELL_IDENT_WHOLE_GLOBAL) { |
| 548 | if (data_length != 8) { |
| 549 | LOGP(DNAT, LOGL_ERROR, |
| 550 | "Ident too short: %d\n", data_length); |
| 551 | return -3; |
| 552 | } |
| 553 | extract_lac(&data[1 + 3], &lac, &ci); |
| 554 | } else if (data[0] == CELL_IDENT_LAC_AND_CI) { |
| 555 | if (data_length != 5) { |
| 556 | LOGP(DNAT, LOGL_ERROR, |
| 557 | "Ident too short: %d\n", data_length); |
| 558 | return -3; |
| 559 | } |
| 560 | extract_lac(&data[1], &lac, &ci); |
| 561 | } else { |
| 562 | LOGP(DNAT, LOGL_ERROR, |
| 563 | "Unhandled cell identifier: %d\n", data[0]); |
| 564 | return -1; |
| 565 | } |
| 566 | |
| 567 | con->lac = lac; |
| 568 | con->ci = ci; |
| 569 | return 0; |
| 570 | } |