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 | 73ec698 | 2014-08-29 09:56:58 +0200 | [diff] [blame] | 123 | void bsc_nat_free(struct bsc_nat *nat) |
| 124 | { |
| 125 | struct bsc_config *cfg, *tmp; |
| 126 | struct bsc_nat_acc_lst *lst, *tmp_lst; |
| 127 | |
| 128 | llist_for_each_entry_safe(cfg, tmp, &nat->bsc_configs, entry) |
| 129 | bsc_config_free(cfg); |
| 130 | llist_for_each_entry_safe(lst, tmp_lst, &nat->access_lists, list) |
| 131 | bsc_nat_acc_lst_delete(lst); |
| 132 | |
| 133 | bsc_nat_num_rewr_entry_adapt(nat, &nat->num_rewr, NULL); |
| 134 | bsc_nat_num_rewr_entry_adapt(nat, &nat->num_rewr_post, NULL); |
| 135 | bsc_nat_num_rewr_entry_adapt(nat, &nat->sms_clear_tp_srr, NULL); |
| 136 | bsc_nat_num_rewr_entry_adapt(nat, &nat->sms_num_rewr, NULL); |
| 137 | bsc_nat_num_rewr_entry_adapt(nat, &nat->tpdest_match, NULL); |
| 138 | |
| 139 | osmo_counter_free(nat->stats.sccp.conn); |
| 140 | osmo_counter_free(nat->stats.sccp.calls); |
| 141 | osmo_counter_free(nat->stats.bsc.reconn); |
| 142 | osmo_counter_free(nat->stats.bsc.auth_fail); |
| 143 | osmo_counter_free(nat->stats.msc.reconn); |
| 144 | osmo_counter_free(nat->stats.ussd.reconn); |
| 145 | talloc_free(nat->mgcp_cfg); |
| 146 | talloc_free(nat); |
| 147 | } |
| 148 | |
Holger Hans Peter Freyther | a88742c | 2010-06-15 18:51:04 +0800 | [diff] [blame] | 149 | void bsc_nat_set_msc_ip(struct bsc_nat *nat, const char *ip) |
| 150 | { |
Holger Hans Peter Freyther | e188010 | 2011-04-23 23:31:31 +0200 | [diff] [blame] | 151 | bsc_replace_string(nat, &nat->main_dest->ip, ip); |
Holger Hans Peter Freyther | a88742c | 2010-06-15 18:51:04 +0800 | [diff] [blame] | 152 | } |
| 153 | |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 154 | struct bsc_connection *bsc_connection_alloc(struct bsc_nat *nat) |
| 155 | { |
| 156 | struct bsc_connection *con = talloc_zero(nat, struct bsc_connection); |
| 157 | if (!con) |
| 158 | return NULL; |
| 159 | |
Holger Hans Peter Freyther | f8048d9 | 2010-03-29 15:14:15 +0200 | [diff] [blame] | 160 | con->nat = nat; |
Pablo Neira Ayuso | e1273b1 | 2011-05-06 12:09:47 +0200 | [diff] [blame] | 161 | osmo_wqueue_init(&con->write_queue, 100); |
Daniel Willmann | a86bc39 | 2011-02-18 14:32:56 +0100 | [diff] [blame] | 162 | INIT_LLIST_HEAD(&con->cmd_pending); |
Holger Hans Peter Freyther | 462b7d7 | 2012-10-24 21:53:40 +0200 | [diff] [blame] | 163 | INIT_LLIST_HEAD(&con->pending_dlcx); |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 164 | return con; |
| 165 | } |
| 166 | |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 167 | 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] | 168 | { |
| 169 | struct bsc_config *conf = talloc_zero(nat, struct bsc_config); |
| 170 | if (!conf) |
| 171 | return NULL; |
| 172 | |
| 173 | conf->token = talloc_strdup(conf, token); |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 174 | conf->nr = nat->num_bsc; |
| 175 | conf->nat = nat; |
Holger Hans Peter Freyther | 9ec030d | 2011-02-27 11:04:27 +0100 | [diff] [blame] | 176 | conf->max_endpoints = 32; |
Holger Hans Peter Freyther | 474698a | 2011-05-02 16:50:36 +0200 | [diff] [blame] | 177 | conf->paging_group = PAGIN_GROUP_UNASSIGNED; |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 178 | |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 179 | INIT_LLIST_HEAD(&conf->lac_list); |
| 180 | |
Holger Hans Peter Freyther | d1278c1 | 2010-04-16 16:52:20 +0200 | [diff] [blame] | 181 | llist_add_tail(&conf->entry, &nat->bsc_configs); |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 182 | ++nat->num_bsc; |
| 183 | |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 184 | 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] | 185 | if (!conf->stats.ctrg) { |
Holger Hans Peter Freyther | dc16bdd | 2014-08-29 09:49:30 +0200 | [diff] [blame] | 186 | llist_del(&conf->entry); |
Holger Hans Peter Freyther | b2c38eb | 2010-06-17 18:16:00 +0800 | [diff] [blame] | 187 | talloc_free(conf); |
| 188 | return NULL; |
| 189 | } |
Holger Hans Peter Freyther | d470286 | 2010-04-12 12:17:09 +0200 | [diff] [blame] | 190 | |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 191 | return conf; |
| 192 | } |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 193 | |
Holger Hans Peter Freyther | 9212d9d | 2011-02-27 11:18:41 +0100 | [diff] [blame] | 194 | void bsc_config_free(struct bsc_config *cfg) |
| 195 | { |
Holger Hans Peter Freyther | 73ec698 | 2014-08-29 09:56:58 +0200 | [diff] [blame] | 196 | llist_del(&cfg->entry); |
Holger Hans Peter Freyther | 9212d9d | 2011-02-27 11:18:41 +0100 | [diff] [blame] | 197 | rate_ctr_group_free(cfg->stats.ctrg); |
Holger Hans Peter Freyther | 73ec698 | 2014-08-29 09:56:58 +0200 | [diff] [blame] | 198 | talloc_free(cfg); |
Holger Hans Peter Freyther | 9212d9d | 2011-02-27 11:18:41 +0100 | [diff] [blame] | 199 | } |
| 200 | |
Holger Hans Peter Freyther | 6860c44 | 2011-05-02 19:16:13 +0200 | [diff] [blame] | 201 | 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] | 202 | { |
| 203 | struct bsc_lac_entry *lac; |
| 204 | |
Holger Hans Peter Freyther | 6860c44 | 2011-05-02 19:16:13 +0200 | [diff] [blame] | 205 | llist_for_each_entry(lac, list, entry) |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 206 | if (lac->lac == _lac) |
| 207 | return; |
| 208 | |
Holger Hans Peter Freyther | 6860c44 | 2011-05-02 19:16:13 +0200 | [diff] [blame] | 209 | lac = talloc_zero(ctx, struct bsc_lac_entry); |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 210 | if (!lac) { |
| 211 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate.\n"); |
| 212 | return; |
| 213 | } |
| 214 | |
| 215 | lac->lac = _lac; |
Holger Hans Peter Freyther | 6860c44 | 2011-05-02 19:16:13 +0200 | [diff] [blame] | 216 | llist_add_tail(&lac->entry, list); |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 217 | } |
| 218 | |
Holger Hans Peter Freyther | 6860c44 | 2011-05-02 19:16:13 +0200 | [diff] [blame] | 219 | static void _del_lac(struct llist_head *list, int _lac) |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 220 | { |
| 221 | struct bsc_lac_entry *lac; |
| 222 | |
Holger Hans Peter Freyther | 6860c44 | 2011-05-02 19:16:13 +0200 | [diff] [blame] | 223 | llist_for_each_entry(lac, list, entry) |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 224 | if (lac->lac == _lac) { |
| 225 | llist_del(&lac->entry); |
| 226 | talloc_free(lac); |
| 227 | return; |
| 228 | } |
| 229 | } |
| 230 | |
Holger Hans Peter Freyther | 6860c44 | 2011-05-02 19:16:13 +0200 | [diff] [blame] | 231 | void bsc_config_add_lac(struct bsc_config *cfg, int _lac) |
| 232 | { |
| 233 | _add_lac(cfg, &cfg->lac_list, _lac); |
| 234 | } |
| 235 | |
| 236 | void bsc_config_del_lac(struct bsc_config *cfg, int _lac) |
| 237 | { |
| 238 | _del_lac(&cfg->lac_list, _lac); |
| 239 | } |
| 240 | |
| 241 | struct bsc_nat_paging_group *bsc_nat_paging_group_create(struct bsc_nat *nat, int group) |
| 242 | { |
| 243 | struct bsc_nat_paging_group *pgroup; |
| 244 | |
| 245 | pgroup = talloc_zero(nat, struct bsc_nat_paging_group); |
| 246 | if (!pgroup) { |
| 247 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate a paging group.\n"); |
| 248 | return NULL; |
| 249 | } |
| 250 | |
| 251 | pgroup->nr = group; |
| 252 | INIT_LLIST_HEAD(&pgroup->lists); |
| 253 | llist_add_tail(&pgroup->entry, &nat->paging_groups); |
| 254 | return pgroup; |
| 255 | } |
| 256 | |
| 257 | void bsc_nat_paging_group_delete(struct bsc_nat_paging_group *pgroup) |
| 258 | { |
| 259 | llist_del(&pgroup->entry); |
| 260 | talloc_free(pgroup); |
| 261 | } |
| 262 | |
| 263 | 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] | 264 | { |
| 265 | struct bsc_nat_paging_group *pgroup; |
| 266 | |
| 267 | llist_for_each_entry(pgroup, &nat->paging_groups, entry) |
| 268 | if (pgroup->nr == group) |
| 269 | return pgroup; |
| 270 | |
| 271 | return NULL; |
| 272 | } |
| 273 | |
Holger Hans Peter Freyther | 6860c44 | 2011-05-02 19:16:13 +0200 | [diff] [blame] | 274 | void bsc_nat_paging_group_add_lac(struct bsc_nat_paging_group *pgroup, int lac) |
| 275 | { |
| 276 | _add_lac(pgroup, &pgroup->lists, lac); |
| 277 | } |
| 278 | |
| 279 | void bsc_nat_paging_group_del_lac(struct bsc_nat_paging_group *pgroup, int lac) |
| 280 | { |
| 281 | _del_lac(&pgroup->lists, lac); |
| 282 | } |
| 283 | |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 284 | int bsc_config_handles_lac(struct bsc_config *cfg, int lac_nr) |
| 285 | { |
Holger Hans Peter Freyther | 474698a | 2011-05-02 16:50:36 +0200 | [diff] [blame] | 286 | struct bsc_nat_paging_group *pgroup; |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 287 | struct bsc_lac_entry *entry; |
| 288 | |
| 289 | llist_for_each_entry(entry, &cfg->lac_list, entry) |
| 290 | if (entry->lac == lac_nr) |
| 291 | return 1; |
| 292 | |
Holger Hans Peter Freyther | 474698a | 2011-05-02 16:50:36 +0200 | [diff] [blame] | 293 | /* now lookup the paging group */ |
| 294 | pgroup = bsc_nat_paging_group_num(cfg->nat, cfg->paging_group); |
| 295 | if (!pgroup) |
| 296 | return 0; |
| 297 | |
| 298 | llist_for_each_entry(entry, &pgroup->lists, entry) |
| 299 | if (entry->lac == lac_nr) |
| 300 | return 1; |
| 301 | |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 302 | return 0; |
| 303 | } |
| 304 | |
Holger Hans Peter Freyther | c279e39 | 2013-04-16 09:53:13 +0200 | [diff] [blame] | 305 | void sccp_connection_destroy(struct nat_sccp_connection *conn) |
Holger Hans Peter Freyther | 23fe7be | 2010-03-30 10:45:48 +0200 | [diff] [blame] | 306 | { |
| 307 | LOGP(DNAT, LOGL_DEBUG, "Destroy 0x%x <-> 0x%x mapping for con %p\n", |
| 308 | sccp_src_ref_to_int(&conn->real_ref), |
| 309 | sccp_src_ref_to_int(&conn->patched_ref), conn->bsc); |
Holger Hans Peter Freyther | 7b7eef6 | 2010-04-22 12:08:17 +0800 | [diff] [blame] | 310 | bsc_mgcp_dlcx(conn); |
Holger Hans Peter Freyther | 23fe7be | 2010-03-30 10:45:48 +0200 | [diff] [blame] | 311 | llist_del(&conn->list_entry); |
| 312 | talloc_free(conn); |
| 313 | } |
| 314 | |
Holger Hans Peter Freyther | 1ffe98c | 2011-05-02 16:20:32 +0200 | [diff] [blame] | 315 | |
| 316 | int bsc_nat_find_paging(struct msgb *msg, |
| 317 | const uint8_t **out_data, int *out_leng) |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 318 | { |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 319 | int data_length; |
Holger Hans Peter Freyther | dbd16fe | 2010-07-23 19:08:55 +0800 | [diff] [blame] | 320 | const uint8_t *data; |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 321 | struct tlv_parsed tp; |
Holger Hans Peter Freyther | 7a77369 | 2010-04-18 02:41:20 +0800 | [diff] [blame] | 322 | |
Holger Hans Peter Freyther | e9be517 | 2010-03-30 06:51:23 +0200 | [diff] [blame] | 323 | if (!msg->l3h || msgb_l3len(msg) < 3) { |
| 324 | LOGP(DNAT, LOGL_ERROR, "Paging message is too short.\n"); |
Holger Hans Peter Freyther | 1ffe98c | 2011-05-02 16:20:32 +0200 | [diff] [blame] | 325 | return -1; |
Holger Hans Peter Freyther | e9be517 | 2010-03-30 06:51:23 +0200 | [diff] [blame] | 326 | } |
| 327 | |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 328 | tlv_parse(&tp, gsm0808_att_tlvdef(), msg->l3h + 3, msgb_l3len(msg) - 3, 0, 0); |
| 329 | if (!TLVP_PRESENT(&tp, GSM0808_IE_CELL_IDENTIFIER_LIST)) { |
| 330 | 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] | 331 | return -2; |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 332 | } |
| 333 | |
| 334 | data_length = TLVP_LEN(&tp, GSM0808_IE_CELL_IDENTIFIER_LIST); |
| 335 | data = TLVP_VAL(&tp, GSM0808_IE_CELL_IDENTIFIER_LIST); |
Holger Hans Peter Freyther | a4376ad | 2010-04-21 18:47:24 +0800 | [diff] [blame] | 336 | |
| 337 | /* No need to try a different BSS */ |
| 338 | if (data[0] == CELL_IDENT_BSS) { |
Holger Hans Peter Freyther | 1ffe98c | 2011-05-02 16:20:32 +0200 | [diff] [blame] | 339 | return -3; |
Holger Hans Peter Freyther | a4376ad | 2010-04-21 18:47:24 +0800 | [diff] [blame] | 340 | } else if (data[0] != CELL_IDENT_LAC) { |
Holger Hans Peter Freyther | 530c4b1 | 2010-04-06 10:25:40 +0200 | [diff] [blame] | 341 | 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] | 342 | return -4; |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 343 | } |
| 344 | |
Holger Hans Peter Freyther | 1ffe98c | 2011-05-02 16:20:32 +0200 | [diff] [blame] | 345 | *out_data = &data[1]; |
| 346 | *out_leng = data_length - 1; |
| 347 | return 0; |
Holger Hans Peter Freyther | a0df82d | 2010-04-01 08:21:33 +0200 | [diff] [blame] | 348 | } |
| 349 | |
Holger Hans Peter Freyther | dbd16fe | 2010-07-23 19:08:55 +0800 | [diff] [blame] | 350 | 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] | 351 | { |
| 352 | struct msgb *msg; |
| 353 | |
| 354 | if (length > 4096 - 128) { |
Pablo Neira Ayuso | ed5cacb | 2011-08-17 22:44:07 +0200 | [diff] [blame] | 355 | 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] | 356 | return -1; |
| 357 | } |
| 358 | |
| 359 | msg = msgb_alloc_headroom(4096, 128, "to-bsc"); |
| 360 | if (!msg) { |
Pablo Neira Ayuso | ed5cacb | 2011-08-17 22:44:07 +0200 | [diff] [blame] | 361 | 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] | 362 | return -1; |
| 363 | } |
| 364 | |
| 365 | /* copy the data */ |
| 366 | msg->l3h = msgb_put(msg, length); |
| 367 | memcpy(msg->l3h, data, length); |
| 368 | |
Holger Hans Peter Freyther | 368a0a7 | 2011-01-07 16:54:46 +0100 | [diff] [blame] | 369 | return bsc_write(bsc, msg, IPAC_PROTO_MGCP_OLD); |
Holger Hans Peter Freyther | a0df82d | 2010-04-01 08:21:33 +0200 | [diff] [blame] | 370 | } |
| 371 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 372 | 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] | 373 | { |
Holger Hans Peter Freyther | 4d44fc5 | 2010-10-13 17:56:22 +0200 | [diff] [blame] | 374 | return bsc_do_write(&bsc->write_queue, msg, proto); |
| 375 | } |
| 376 | |
Pablo Neira Ayuso | e1273b1 | 2011-05-06 12:09:47 +0200 | [diff] [blame] | 377 | 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] | 378 | { |
Holger Hans Peter Freyther | a0df82d | 2010-04-01 08:21:33 +0200 | [diff] [blame] | 379 | /* prepend the header */ |
Harald Welte | 4a88a49 | 2014-08-20 23:46:40 +0200 | [diff] [blame] | 380 | ipa_prepend_header(msg, proto); |
Holger Hans Peter Freyther | 7e8da13 | 2010-10-16 17:33:46 +0200 | [diff] [blame] | 381 | return bsc_write_msg(queue, msg); |
| 382 | } |
Holger Hans Peter Freyther | a0df82d | 2010-04-01 08:21:33 +0200 | [diff] [blame] | 383 | |
Pablo Neira Ayuso | e1273b1 | 2011-05-06 12:09:47 +0200 | [diff] [blame] | 384 | 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] | 385 | { |
Pablo Neira Ayuso | e1273b1 | 2011-05-06 12:09:47 +0200 | [diff] [blame] | 386 | if (osmo_wqueue_enqueue(queue, msg) != 0) { |
Pablo Neira Ayuso | ed5cacb | 2011-08-17 22:44:07 +0200 | [diff] [blame] | 387 | LOGP(DLINP, LOGL_ERROR, "Failed to enqueue the write.\n"); |
Holger Hans Peter Freyther | a0df82d | 2010-04-01 08:21:33 +0200 | [diff] [blame] | 388 | msgb_free(msg); |
| 389 | return -1; |
| 390 | } |
| 391 | |
| 392 | return 0; |
| 393 | } |
Holger Hans Peter Freyther | b4af5c9 | 2010-05-14 03:39:56 +0800 | [diff] [blame] | 394 | |
Holger Hans Peter Freyther | c1cac1e | 2010-10-11 09:50:31 +0200 | [diff] [blame] | 395 | 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] | 396 | { |
| 397 | struct bsc_nat_acc_lst_entry *entry; |
| 398 | |
| 399 | llist_for_each_entry(entry, &lst->fltr_list, list) { |
| 400 | if (!entry->imsi_allow) |
| 401 | continue; |
| 402 | if (regexec(&entry->imsi_allow_re, mi_string, 0, NULL, 0) == 0) |
| 403 | return 0; |
| 404 | } |
| 405 | |
| 406 | return 1; |
| 407 | } |
| 408 | |
Holger Hans Peter Freyther | a396757 | 2010-09-29 02:30:50 +0800 | [diff] [blame] | 409 | struct gsm48_hdr *bsc_unpack_dtap(struct bsc_nat_parsed *parsed, |
| 410 | struct msgb *msg, uint32_t *len) |
| 411 | { |
| 412 | /* gsm_type is actually the size of the dtap */ |
| 413 | *len = parsed->gsm_type; |
| 414 | if (*len < msgb_l3len(msg) - 3) { |
| 415 | LOGP(DNAT, LOGL_ERROR, "Not enough space for DTAP.\n"); |
| 416 | return NULL; |
| 417 | } |
| 418 | |
Holger Hans Peter Freyther | c2c0ea7 | 2012-01-10 22:27:43 +0100 | [diff] [blame] | 419 | if (msgb_l3len(msg) - 3 < msg->l3h[2]) { |
| 420 | LOGP(DNAT, LOGL_ERROR, |
| 421 | "GSM48 payload does not fit: %d %d\n", |
| 422 | msg->l3h[2], msgb_l3len(msg) - 3); |
Holger Hans Peter Freyther | a396757 | 2010-09-29 02:30:50 +0800 | [diff] [blame] | 423 | return NULL; |
| 424 | } |
| 425 | |
| 426 | msg->l4h = &msg->l3h[3]; |
| 427 | return (struct gsm48_hdr *) msg->l4h; |
| 428 | } |
| 429 | |
Holger Hans Peter Freyther | 234d312 | 2010-05-16 02:06:11 +0800 | [diff] [blame] | 430 | static const char *con_types [] = { |
| 431 | [NAT_CON_TYPE_NONE] = "n/a", |
| 432 | [NAT_CON_TYPE_LU] = "Location Update", |
| 433 | [NAT_CON_TYPE_CM_SERV_REQ] = "CM Serv Req", |
| 434 | [NAT_CON_TYPE_PAG_RESP] = "Paging Response", |
Holger Hans Peter Freyther | 74dc303 | 2010-09-29 02:47:29 +0800 | [diff] [blame] | 435 | [NAT_CON_TYPE_SSA] = "Supplementar Service Activation", |
Holger Hans Peter Freyther | b71c23b | 2010-05-16 20:43:52 +0800 | [diff] [blame] | 436 | [NAT_CON_TYPE_LOCAL_REJECT] = "Local Reject", |
Holger Hans Peter Freyther | 234d312 | 2010-05-16 02:06:11 +0800 | [diff] [blame] | 437 | [NAT_CON_TYPE_OTHER] = "Other", |
| 438 | }; |
| 439 | |
| 440 | const char *bsc_con_type_to_string(int type) |
| 441 | { |
| 442 | return con_types[type]; |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 443 | } |
| 444 | |
Holger Hans Peter Freyther | 29c6703 | 2010-06-08 10:14:44 +0800 | [diff] [blame] | 445 | 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] | 446 | { |
Holger Hans Peter Freyther | 29c6703 | 2010-06-08 10:14:44 +0800 | [diff] [blame] | 447 | struct bsc_nat_acc_lst *lst; |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 448 | |
| 449 | if (!name) |
| 450 | return NULL; |
| 451 | |
| 452 | llist_for_each_entry(lst, &nat->access_lists, list) |
| 453 | if (strcmp(lst->name, name) == 0) |
| 454 | return lst; |
| 455 | |
| 456 | return NULL; |
| 457 | } |
| 458 | |
Holger Hans Peter Freyther | 29c6703 | 2010-06-08 10:14:44 +0800 | [diff] [blame] | 459 | 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] | 460 | { |
Holger Hans Peter Freyther | 29c6703 | 2010-06-08 10:14:44 +0800 | [diff] [blame] | 461 | struct bsc_nat_acc_lst *lst; |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 462 | |
Holger Hans Peter Freyther | 29c6703 | 2010-06-08 10:14:44 +0800 | [diff] [blame] | 463 | lst = bsc_nat_acc_lst_find(nat, name); |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 464 | if (lst) |
| 465 | return lst; |
| 466 | |
Holger Hans Peter Freyther | 29c6703 | 2010-06-08 10:14:44 +0800 | [diff] [blame] | 467 | lst = talloc_zero(nat, struct bsc_nat_acc_lst); |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 468 | if (!lst) { |
| 469 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate access list"); |
| 470 | return NULL; |
| 471 | } |
| 472 | |
Holger Hans Peter Freyther | 2f1a984 | 2010-09-25 06:14:52 +0800 | [diff] [blame] | 473 | /* TODO: get the index right */ |
| 474 | lst->stats = rate_ctr_group_alloc(lst, &bsc_cfg_acc_list_desc, 0); |
| 475 | if (!lst->stats) { |
| 476 | talloc_free(lst); |
| 477 | return NULL; |
| 478 | } |
| 479 | |
Holger Hans Peter Freyther | d77c817 | 2010-06-08 10:53:39 +0800 | [diff] [blame] | 480 | INIT_LLIST_HEAD(&lst->fltr_list); |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 481 | lst->name = talloc_strdup(lst, name); |
Holger Hans Peter Freyther | 26c3a35 | 2010-06-08 11:00:09 +0800 | [diff] [blame] | 482 | llist_add_tail(&lst->list, &nat->access_lists); |
Holger Hans Peter Freyther | 8affef5 | 2010-06-01 01:03:13 +0800 | [diff] [blame] | 483 | return lst; |
Holger Hans Peter Freyther | e4900a0 | 2010-06-03 01:44:05 +0800 | [diff] [blame] | 484 | } |
| 485 | |
Holger Hans Peter Freyther | 29c6703 | 2010-06-08 10:14:44 +0800 | [diff] [blame] | 486 | 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] | 487 | { |
| 488 | llist_del(&lst->list); |
Holger Hans Peter Freyther | 2f1a984 | 2010-09-25 06:14:52 +0800 | [diff] [blame] | 489 | rate_ctr_group_free(lst->stats); |
Holger Hans Peter Freyther | e4900a0 | 2010-06-03 01:44:05 +0800 | [diff] [blame] | 490 | talloc_free(lst); |
Holger Hans Peter Freyther | d77c817 | 2010-06-08 10:53:39 +0800 | [diff] [blame] | 491 | } |
| 492 | |
| 493 | struct bsc_nat_acc_lst_entry *bsc_nat_acc_lst_entry_create(struct bsc_nat_acc_lst *lst) |
| 494 | { |
| 495 | struct bsc_nat_acc_lst_entry *entry; |
| 496 | |
| 497 | entry = talloc_zero(lst, struct bsc_nat_acc_lst_entry); |
| 498 | if (!entry) |
| 499 | return NULL; |
| 500 | |
Holger Hans Peter Freyther | 415cd2e | 2014-01-20 09:55:46 +0100 | [diff] [blame] | 501 | entry->cm_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED; |
| 502 | entry->lu_reject_cause = GSM48_REJECT_PLMN_NOT_ALLOWED; |
Holger Hans Peter Freyther | 26c3a35 | 2010-06-08 11:00:09 +0800 | [diff] [blame] | 503 | llist_add_tail(&entry->list, &lst->fltr_list); |
Holger Hans Peter Freyther | d77c817 | 2010-06-08 10:53:39 +0800 | [diff] [blame] | 504 | return entry; |
Holger Hans Peter Freyther | b2c38eb | 2010-06-17 18:16:00 +0800 | [diff] [blame] | 505 | } |
Holger Hans Peter Freyther | 20ee312 | 2010-07-05 14:39:44 +0800 | [diff] [blame] | 506 | |
| 507 | int bsc_nat_msc_is_connected(struct bsc_nat *nat) |
| 508 | { |
| 509 | return nat->msc_con->is_connected; |
| 510 | } |
Holger Hans Peter Freyther | 463dc62 | 2010-10-03 19:41:42 +0800 | [diff] [blame] | 511 | |
| 512 | static const int con_to_ctr[] = { |
| 513 | [NAT_CON_TYPE_NONE] = -1, |
| 514 | [NAT_CON_TYPE_LU] = BCFG_CTR_CON_TYPE_LU, |
| 515 | [NAT_CON_TYPE_CM_SERV_REQ] = BCFG_CTR_CON_CMSERV_RQ, |
| 516 | [NAT_CON_TYPE_PAG_RESP] = BCFG_CTR_CON_PAG_RESP, |
Holger Hans Peter Freyther | 74dc303 | 2010-09-29 02:47:29 +0800 | [diff] [blame] | 517 | [NAT_CON_TYPE_SSA] = BCFG_CTR_CON_SSA, |
Holger Hans Peter Freyther | 463dc62 | 2010-10-03 19:41:42 +0800 | [diff] [blame] | 518 | [NAT_CON_TYPE_LOCAL_REJECT] = -1, |
| 519 | [NAT_CON_TYPE_OTHER] = BCFG_CTR_CON_OTHER, |
| 520 | }; |
| 521 | |
Holger Hans Peter Freyther | c279e39 | 2013-04-16 09:53:13 +0200 | [diff] [blame] | 522 | 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] | 523 | { |
| 524 | return con_to_ctr[conn->con_type]; |
| 525 | } |
Holger Hans Peter Freyther | 69cfa17 | 2010-10-13 20:37:13 +0200 | [diff] [blame] | 526 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 527 | 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] | 528 | { |
| 529 | int rc; |
| 530 | |
| 531 | rc = write(bfd->fd, msg->data, msg->len); |
| 532 | if (rc != msg->len) |
| 533 | LOGP(DNAT, LOGL_ERROR, "Failed to write message to the BSC.\n"); |
| 534 | |
| 535 | return rc; |
| 536 | } |
| 537 | |
Holger Hans Peter Freyther | b2b291d | 2013-04-16 13:23:43 +0200 | [diff] [blame] | 538 | static void extract_lac(const uint8_t *data, uint16_t *lac, uint16_t *ci) |
| 539 | { |
| 540 | memcpy(lac, &data[0], sizeof(*lac)); |
| 541 | memcpy(ci, &data[2], sizeof(*ci)); |
| 542 | |
| 543 | *lac = ntohs(*lac); |
| 544 | *ci = ntohs(*ci); |
| 545 | } |
| 546 | |
| 547 | int bsc_nat_extract_lac(struct bsc_connection *bsc, |
| 548 | struct nat_sccp_connection *con, |
| 549 | struct bsc_nat_parsed *parsed, struct msgb *msg) |
| 550 | { |
| 551 | int data_length; |
| 552 | const uint8_t *data; |
| 553 | struct tlv_parsed tp; |
| 554 | uint16_t lac, ci; |
| 555 | |
| 556 | if (parsed->gsm_type != BSS_MAP_MSG_COMPLETE_LAYER_3) { |
| 557 | LOGP(DNAT, LOGL_ERROR, "Can only extract LAC from Complete Layer3\n"); |
| 558 | return -1; |
| 559 | } |
| 560 | |
| 561 | if (!msg->l3h || msgb_l3len(msg) < 3) { |
| 562 | LOGP(DNAT, LOGL_ERROR, "Complete Layer3 mssage is too short.\n"); |
| 563 | return -1; |
| 564 | } |
| 565 | |
| 566 | tlv_parse(&tp, gsm0808_att_tlvdef(), msg->l3h + 3, msgb_l3len(msg) - 3, 0, 0); |
| 567 | if (!TLVP_PRESENT(&tp, GSM0808_IE_CELL_IDENTIFIER)) { |
| 568 | LOGP(DNAT, LOGL_ERROR, "No CellIdentifier List inside paging msg.\n"); |
| 569 | return -2; |
| 570 | } |
| 571 | |
| 572 | data_length = TLVP_LEN(&tp, GSM0808_IE_CELL_IDENTIFIER); |
| 573 | data = TLVP_VAL(&tp, GSM0808_IE_CELL_IDENTIFIER); |
| 574 | |
| 575 | /* Attemt to get the LAC/CI from it */ |
| 576 | if (data[0] == CELL_IDENT_WHOLE_GLOBAL) { |
| 577 | if (data_length != 8) { |
| 578 | LOGP(DNAT, LOGL_ERROR, |
| 579 | "Ident too short: %d\n", data_length); |
| 580 | return -3; |
| 581 | } |
| 582 | extract_lac(&data[1 + 3], &lac, &ci); |
| 583 | } else if (data[0] == CELL_IDENT_LAC_AND_CI) { |
| 584 | if (data_length != 5) { |
| 585 | LOGP(DNAT, LOGL_ERROR, |
| 586 | "Ident too short: %d\n", data_length); |
| 587 | return -3; |
| 588 | } |
| 589 | extract_lac(&data[1], &lac, &ci); |
| 590 | } else { |
| 591 | LOGP(DNAT, LOGL_ERROR, |
| 592 | "Unhandled cell identifier: %d\n", data[0]); |
| 593 | return -1; |
| 594 | } |
| 595 | |
| 596 | con->lac = lac; |
| 597 | con->ci = ci; |
| 598 | return 0; |
| 599 | } |