Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 1 | /* BSC Multiplexer/NAT */ |
| 2 | |
| 3 | /* |
| 4 | * (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org> |
Holger Hans Peter Freyther | df6143a | 2010-06-15 18:46:56 +0800 | [diff] [blame] | 5 | * (C) 2010 by On-Waves |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 6 | * (C) 2009 by Harald Welte <laforge@gnumonks.org> |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +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 | 9e2c5f5 | 2010-06-15 18:44:42 +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 | 9e2c5f5 | 2010-06-15 18:44:42 +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 | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 21 | * |
| 22 | */ |
| 23 | #include <sys/socket.h> |
| 24 | #include <netinet/in.h> |
Holger Hans Peter Freyther | 9e938c6 | 2010-05-05 18:58:13 +0800 | [diff] [blame] | 25 | #include <netinet/tcp.h> |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 26 | #include <arpa/inet.h> |
| 27 | |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 28 | #include <errno.h> |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 29 | #include <signal.h> |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 30 | #include <stdio.h> |
| 31 | #include <stdlib.h> |
Holger Hans Peter Freyther | 5aa25ae | 2010-01-12 21:36:08 +0100 | [diff] [blame] | 32 | #include <time.h> |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 33 | #include <unistd.h> |
| 34 | |
| 35 | #define _GNU_SOURCE |
| 36 | #include <getopt.h> |
| 37 | |
| 38 | #include <openbsc/debug.h> |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 39 | #include <openbsc/bsc_msc.h> |
Holger Hans Peter Freyther | 6a97b8d | 2010-06-15 18:45:26 +0800 | [diff] [blame] | 40 | #include <openbsc/bsc_nat.h> |
Holger Hans Peter Freyther | c2b31ed | 2010-07-31 05:17:17 +0800 | [diff] [blame] | 41 | #include <openbsc/bsc_nat_sccp.h> |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 42 | #include <openbsc/ipaccess.h> |
| 43 | #include <openbsc/abis_nm.h> |
Holger Hans Peter Freyther | f961de1 | 2010-10-12 23:28:28 +0200 | [diff] [blame] | 44 | #include <openbsc/socket.h> |
Holger Hans Peter Freyther | 1398f13 | 2010-06-15 20:14:08 +0800 | [diff] [blame] | 45 | #include <openbsc/vty.h> |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 46 | |
Harald Welte | d36ff76 | 2011-03-23 18:26:56 +0100 | [diff] [blame^] | 47 | #include <osmocom/gsm/gsm0808.h> |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 48 | #include <osmocom/core/talloc.h> |
| 49 | #include <osmocom/core/process.h> |
Holger Hans Peter Freyther | 6c45f2e | 2010-06-15 19:06:18 +0800 | [diff] [blame] | 50 | |
Harald Welte | d36ff76 | 2011-03-23 18:26:56 +0100 | [diff] [blame^] | 51 | #include <osmocom/gsm/protocol/gsm_08_08.h> |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 52 | |
Holger Hans Peter Freyther | 1398f13 | 2010-06-15 20:14:08 +0800 | [diff] [blame] | 53 | #include <osmocom/vty/telnet_interface.h> |
| 54 | #include <osmocom/vty/vty.h> |
Pablo Neira Ayuso | 739a566 | 2011-03-09 13:36:32 +0100 | [diff] [blame] | 55 | #include <osmocom/vty/logging.h> |
Holger Hans Peter Freyther | 1398f13 | 2010-06-15 20:14:08 +0800 | [diff] [blame] | 56 | |
Harald Welte | d5db12c | 2010-08-03 15:11:51 +0200 | [diff] [blame] | 57 | #include <osmocom/sccp/sccp.h> |
Holger Hans Peter Freyther | 6a97b8d | 2010-06-15 18:45:26 +0800 | [diff] [blame] | 58 | |
Holger Hans Peter Freyther | 1398f13 | 2010-06-15 20:14:08 +0800 | [diff] [blame] | 59 | #include "../../bscconfig.h" |
| 60 | |
Holger Hans Peter Freyther | 6b6ecba | 2010-06-15 18:51:56 +0800 | [diff] [blame] | 61 | #define SCCP_CLOSE_TIME 20 |
| 62 | #define SCCP_CLOSE_TIME_TIMEOUT 19 |
| 63 | |
Holger Hans Peter Freyther | fb7a934 | 2010-06-15 19:14:12 +0800 | [diff] [blame] | 64 | struct log_target *stderr_target; |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 65 | static const char *config_file = "bsc-nat.cfg"; |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 66 | static struct in_addr local_addr; |
Holger Hans Peter Freyther | 2d677c6 | 2010-03-26 06:51:04 +0100 | [diff] [blame] | 67 | static struct bsc_fd bsc_listen; |
Holger Hans Peter Freyther | a88742c | 2010-06-15 18:51:04 +0800 | [diff] [blame] | 68 | static const char *msc_ip = NULL; |
Holger Hans Peter Freyther | 6b6ecba | 2010-06-15 18:51:56 +0800 | [diff] [blame] | 69 | static struct timer_list sccp_close; |
Harald Welte | 2c869ef | 2010-08-25 19:43:54 +0200 | [diff] [blame] | 70 | static int daemonize = 0; |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 71 | |
Holger Hans Peter Freyther | 1398f13 | 2010-06-15 20:14:08 +0800 | [diff] [blame] | 72 | const char *openbsc_copyright = |
Holger Hans Peter Freyther | 5f54075 | 2010-09-11 13:32:30 +0800 | [diff] [blame] | 73 | "Copyright (C) 2010 Holger Hans Peter Freyther and On-Waves\r\n" |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 74 | "License AGPLv3+: GNU AGPL version 3 or later <http://gnu.org/licenses/agpl-3.0.html>\r\n" |
Holger Hans Peter Freyther | 5f54075 | 2010-09-11 13:32:30 +0800 | [diff] [blame] | 75 | "This is free software: you are free to change and redistribute it.\r\n" |
| 76 | "There is NO WARRANTY, to the extent permitted by law.\r\n"; |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 77 | |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 78 | static struct bsc_nat *nat; |
Holger Hans Peter Freyther | dbd16fe | 2010-07-23 19:08:55 +0800 | [diff] [blame] | 79 | static void bsc_send_data(struct bsc_connection *bsc, const uint8_t *data, unsigned int length, int); |
Holger Hans Peter Freyther | b752761 | 2010-04-07 11:20:36 +0200 | [diff] [blame] | 80 | static void msc_send_reset(struct bsc_msc_connection *con); |
Holger Hans Peter Freyther | ee88496 | 2010-09-25 17:58:22 +0800 | [diff] [blame] | 81 | static void bsc_stat_reject(int filter, struct bsc_connection *bsc, int normal); |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 82 | |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 83 | struct bsc_config *bsc_config_num(struct bsc_nat *nat, int num) |
| 84 | { |
| 85 | struct bsc_config *conf; |
| 86 | |
| 87 | llist_for_each_entry(conf, &nat->bsc_configs, entry) |
| 88 | if (conf->nr == num) |
| 89 | return conf; |
| 90 | |
| 91 | return NULL; |
| 92 | } |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 93 | |
Holger Hans Peter Freyther | 9d56d0c | 2010-04-22 19:11:37 +0800 | [diff] [blame] | 94 | static void queue_for_msc(struct bsc_msc_connection *con, struct msgb *msg) |
| 95 | { |
Holger Hans Peter Freyther | e8e41e6 | 2010-10-06 00:24:28 +0800 | [diff] [blame] | 96 | if (!con) { |
| 97 | LOGP(DINP, LOGL_ERROR, "No MSC Connection assigned. Check your code.\n"); |
| 98 | msgb_free(msg); |
| 99 | return; |
| 100 | } |
| 101 | |
| 102 | |
Holger Hans Peter Freyther | db65bbd | 2010-07-05 13:58:40 +0800 | [diff] [blame] | 103 | if (write_queue_enqueue(&con->write_queue, msg) != 0) { |
Holger Hans Peter Freyther | 9d56d0c | 2010-04-22 19:11:37 +0800 | [diff] [blame] | 104 | LOGP(DINP, LOGL_ERROR, "Failed to enqueue the write.\n"); |
| 105 | msgb_free(msg); |
| 106 | } |
| 107 | } |
| 108 | |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 109 | static void send_reset_ack(struct bsc_connection *bsc) |
Holger Hans Peter Freyther | 38a77d0 | 2010-01-30 12:45:10 +0100 | [diff] [blame] | 110 | { |
Holger Hans Peter Freyther | dbd16fe | 2010-07-23 19:08:55 +0800 | [diff] [blame] | 111 | static const uint8_t gsm_reset_ack[] = { |
Holger Hans Peter Freyther | 38a77d0 | 2010-01-30 12:45:10 +0100 | [diff] [blame] | 112 | 0x09, 0x00, 0x03, 0x07, 0x0b, 0x04, 0x43, 0x01, |
| 113 | 0x00, 0xfe, 0x04, 0x43, 0x5c, 0x00, 0xfe, 0x03, |
| 114 | 0x00, 0x01, 0x31, |
| 115 | }; |
| 116 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 117 | bsc_send_data(bsc, gsm_reset_ack, sizeof(gsm_reset_ack), IPAC_PROTO_SCCP); |
Holger Hans Peter Freyther | 38a77d0 | 2010-01-30 12:45:10 +0100 | [diff] [blame] | 118 | } |
| 119 | |
Holger Hans Peter Freyther | 906c15e | 2010-05-02 19:28:59 +0800 | [diff] [blame] | 120 | static void send_ping(struct bsc_connection *bsc) |
| 121 | { |
Holger Hans Peter Freyther | dbd16fe | 2010-07-23 19:08:55 +0800 | [diff] [blame] | 122 | static const uint8_t id_ping[] = { |
Holger Hans Peter Freyther | 906c15e | 2010-05-02 19:28:59 +0800 | [diff] [blame] | 123 | IPAC_MSGT_PING, |
| 124 | }; |
| 125 | |
| 126 | bsc_send_data(bsc, id_ping, sizeof(id_ping), IPAC_PROTO_IPACCESS); |
| 127 | } |
| 128 | |
Holger Hans Peter Freyther | 5078871 | 2010-06-15 18:51:33 +0800 | [diff] [blame] | 129 | static void send_pong(struct bsc_connection *bsc) |
| 130 | { |
Holger Hans Peter Freyther | dbd16fe | 2010-07-23 19:08:55 +0800 | [diff] [blame] | 131 | static const uint8_t id_pong[] = { |
Holger Hans Peter Freyther | 5078871 | 2010-06-15 18:51:33 +0800 | [diff] [blame] | 132 | IPAC_MSGT_PONG, |
| 133 | }; |
| 134 | |
| 135 | bsc_send_data(bsc, id_pong, sizeof(id_pong), IPAC_PROTO_IPACCESS); |
| 136 | } |
| 137 | |
Holger Hans Peter Freyther | 906c15e | 2010-05-02 19:28:59 +0800 | [diff] [blame] | 138 | static void bsc_pong_timeout(void *_bsc) |
| 139 | { |
| 140 | struct bsc_connection *bsc = _bsc; |
| 141 | |
| 142 | LOGP(DNAT, LOGL_ERROR, "BSC Nr: %d PONG timeout.\n", bsc->cfg->nr); |
| 143 | bsc_close_connection(bsc); |
| 144 | } |
| 145 | |
| 146 | static void bsc_ping_timeout(void *_bsc) |
| 147 | { |
| 148 | struct bsc_connection *bsc = _bsc; |
| 149 | |
Holger Hans Peter Freyther | da35a8d | 2010-05-05 16:57:38 +0800 | [diff] [blame] | 150 | if (bsc->nat->ping_timeout < 0) |
| 151 | return; |
| 152 | |
Holger Hans Peter Freyther | 906c15e | 2010-05-02 19:28:59 +0800 | [diff] [blame] | 153 | send_ping(bsc); |
| 154 | |
| 155 | /* send another ping in 20 seconds */ |
Holger Hans Peter Freyther | da35a8d | 2010-05-05 16:57:38 +0800 | [diff] [blame] | 156 | bsc_schedule_timer(&bsc->ping_timeout, bsc->nat->ping_timeout, 0); |
Holger Hans Peter Freyther | 906c15e | 2010-05-02 19:28:59 +0800 | [diff] [blame] | 157 | |
| 158 | /* also start a pong timer */ |
Holger Hans Peter Freyther | da35a8d | 2010-05-05 16:57:38 +0800 | [diff] [blame] | 159 | bsc_schedule_timer(&bsc->pong_timeout, bsc->nat->pong_timeout, 0); |
Holger Hans Peter Freyther | 906c15e | 2010-05-02 19:28:59 +0800 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | static void start_ping_pong(struct bsc_connection *bsc) |
| 163 | { |
| 164 | bsc->pong_timeout.data = bsc; |
| 165 | bsc->pong_timeout.cb = bsc_pong_timeout; |
| 166 | bsc->ping_timeout.data = bsc; |
| 167 | bsc->ping_timeout.cb = bsc_ping_timeout; |
| 168 | |
| 169 | bsc_ping_timeout(bsc); |
| 170 | } |
| 171 | |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 172 | static void send_id_ack(struct bsc_connection *bsc) |
Holger Hans Peter Freyther | db7ba7d | 2010-03-26 07:41:54 +0100 | [diff] [blame] | 173 | { |
Holger Hans Peter Freyther | dbd16fe | 2010-07-23 19:08:55 +0800 | [diff] [blame] | 174 | static const uint8_t id_ack[] = { |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 175 | IPAC_MSGT_ID_ACK |
Holger Hans Peter Freyther | db7ba7d | 2010-03-26 07:41:54 +0100 | [diff] [blame] | 176 | }; |
| 177 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 178 | bsc_send_data(bsc, id_ack, sizeof(id_ack), IPAC_PROTO_IPACCESS); |
Holger Hans Peter Freyther | db7ba7d | 2010-03-26 07:41:54 +0100 | [diff] [blame] | 179 | } |
| 180 | |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 181 | static void send_id_req(struct bsc_connection *bsc) |
Holger Hans Peter Freyther | db7ba7d | 2010-03-26 07:41:54 +0100 | [diff] [blame] | 182 | { |
Holger Hans Peter Freyther | dbd16fe | 2010-07-23 19:08:55 +0800 | [diff] [blame] | 183 | static const uint8_t id_req[] = { |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 184 | IPAC_MSGT_ID_GET, |
Holger Hans Peter Freyther | db7ba7d | 2010-03-26 07:41:54 +0100 | [diff] [blame] | 185 | 0x01, IPAC_IDTAG_UNIT, |
| 186 | 0x01, IPAC_IDTAG_MACADDR, |
| 187 | 0x01, IPAC_IDTAG_LOCATION1, |
| 188 | 0x01, IPAC_IDTAG_LOCATION2, |
| 189 | 0x01, IPAC_IDTAG_EQUIPVERS, |
| 190 | 0x01, IPAC_IDTAG_SWVERSION, |
| 191 | 0x01, IPAC_IDTAG_UNITNAME, |
| 192 | 0x01, IPAC_IDTAG_SERNR, |
| 193 | }; |
| 194 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 195 | bsc_send_data(bsc, id_req, sizeof(id_req), IPAC_PROTO_IPACCESS); |
Holger Hans Peter Freyther | db7ba7d | 2010-03-26 07:41:54 +0100 | [diff] [blame] | 196 | } |
| 197 | |
Holger Hans Peter Freyther | 07dfc70 | 2010-10-27 10:54:11 +0200 | [diff] [blame] | 198 | static void nat_send_rlsd_msc(struct sccp_connections *conn) |
Holger Hans Peter Freyther | 6b087d1 | 2010-04-06 17:32:58 +0200 | [diff] [blame] | 199 | { |
| 200 | struct sccp_connection_released *rel; |
| 201 | struct msgb *msg; |
| 202 | |
| 203 | msg = msgb_alloc_headroom(4096, 128, "rlsd"); |
| 204 | if (!msg) { |
| 205 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate clear command.\n"); |
| 206 | return; |
| 207 | } |
| 208 | |
| 209 | msg->l2h = msgb_put(msg, sizeof(*rel)); |
| 210 | rel = (struct sccp_connection_released *) msg->l2h; |
| 211 | rel->type = SCCP_MSG_TYPE_RLSD; |
| 212 | rel->release_cause = SCCP_RELEASE_CAUSE_SCCP_FAILURE; |
| 213 | rel->destination_local_reference = conn->remote_ref; |
| 214 | rel->source_local_reference = conn->patched_ref; |
| 215 | |
| 216 | ipaccess_prepend_header(msg, IPAC_PROTO_SCCP); |
| 217 | |
Holger Hans Peter Freyther | db65bbd | 2010-07-05 13:58:40 +0800 | [diff] [blame] | 218 | queue_for_msc(conn->msc_con, msg); |
Holger Hans Peter Freyther | 6b087d1 | 2010-04-06 17:32:58 +0200 | [diff] [blame] | 219 | } |
| 220 | |
Holger Hans Peter Freyther | 54f5352 | 2010-10-27 11:01:55 +0200 | [diff] [blame] | 221 | static void nat_send_rlsd_bsc(struct sccp_connections *conn) |
| 222 | { |
| 223 | struct sccp_connection_released *rel; |
| 224 | struct msgb *msg; |
| 225 | |
| 226 | msg = msgb_alloc_headroom(4096, 128, "rlsd"); |
| 227 | if (!msg) { |
| 228 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate clear command.\n"); |
| 229 | return; |
| 230 | } |
| 231 | |
| 232 | msg->l2h = msgb_put(msg, sizeof(*rel)); |
| 233 | rel = (struct sccp_connection_released *) msg->l2h; |
| 234 | rel->type = SCCP_MSG_TYPE_RLSD; |
| 235 | rel->release_cause = SCCP_RELEASE_CAUSE_SCCP_FAILURE; |
| 236 | rel->destination_local_reference = conn->real_ref; |
| 237 | rel->source_local_reference = conn->remote_ref; |
| 238 | |
| 239 | bsc_write(conn->bsc, msg, IPAC_PROTO_SCCP); |
| 240 | } |
| 241 | |
Holger Hans Peter Freyther | 43eb1a3 | 2010-10-29 17:05:28 +0200 | [diff] [blame] | 242 | static struct msgb *nat_creat_clrc(struct sccp_connections *conn, uint8_t cause) |
Holger Hans Peter Freyther | a8a50a8 | 2010-10-27 11:58:04 +0200 | [diff] [blame] | 243 | { |
| 244 | struct msgb *msg; |
| 245 | struct msgb *sccp; |
| 246 | |
Holger Hans Peter Freyther | 43eb1a3 | 2010-10-29 17:05:28 +0200 | [diff] [blame] | 247 | msg = gsm0808_create_clear_command(cause); |
Holger Hans Peter Freyther | a8a50a8 | 2010-10-27 11:58:04 +0200 | [diff] [blame] | 248 | if (!msg) { |
| 249 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate clear command.\n"); |
Holger Hans Peter Freyther | 43eb1a3 | 2010-10-29 17:05:28 +0200 | [diff] [blame] | 250 | return NULL; |
Holger Hans Peter Freyther | a8a50a8 | 2010-10-27 11:58:04 +0200 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | sccp = sccp_create_dt1(&conn->real_ref, msg->data, msg->len); |
| 254 | if (!sccp) { |
| 255 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate SCCP msg.\n"); |
| 256 | msgb_free(msg); |
Holger Hans Peter Freyther | 43eb1a3 | 2010-10-29 17:05:28 +0200 | [diff] [blame] | 257 | return NULL; |
Holger Hans Peter Freyther | a8a50a8 | 2010-10-27 11:58:04 +0200 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | msgb_free(msg); |
Holger Hans Peter Freyther | 43eb1a3 | 2010-10-29 17:05:28 +0200 | [diff] [blame] | 261 | return sccp; |
| 262 | } |
| 263 | |
| 264 | static int nat_send_clrc_bsc(struct sccp_connections *conn) |
| 265 | { |
| 266 | struct msgb *sccp; |
| 267 | |
| 268 | sccp = nat_creat_clrc(conn, 0x20); |
| 269 | if (!sccp) |
| 270 | return -1; |
| 271 | return bsc_write(conn->bsc, sccp, IPAC_PROTO_SCCP); |
Holger Hans Peter Freyther | a8a50a8 | 2010-10-27 11:58:04 +0200 | [diff] [blame] | 272 | } |
| 273 | |
Holger Hans Peter Freyther | db65bbd | 2010-07-05 13:58:40 +0800 | [diff] [blame] | 274 | static void nat_send_rlc(struct bsc_msc_connection *msc_con, |
| 275 | struct sccp_source_reference *src, |
Holger Hans Peter Freyther | b8a3373 | 2010-04-08 11:28:12 +0200 | [diff] [blame] | 276 | struct sccp_source_reference *dst) |
| 277 | { |
| 278 | struct sccp_connection_release_complete *rlc; |
| 279 | struct msgb *msg; |
| 280 | |
| 281 | msg = msgb_alloc_headroom(4096, 128, "rlc"); |
| 282 | if (!msg) { |
| 283 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate clear command.\n"); |
| 284 | return; |
| 285 | } |
| 286 | |
| 287 | msg->l2h = msgb_put(msg, sizeof(*rlc)); |
| 288 | rlc = (struct sccp_connection_release_complete *) msg->l2h; |
| 289 | rlc->type = SCCP_MSG_TYPE_RLC; |
| 290 | rlc->destination_local_reference = *dst; |
| 291 | rlc->source_local_reference = *src; |
| 292 | |
| 293 | ipaccess_prepend_header(msg, IPAC_PROTO_SCCP); |
| 294 | |
Holger Hans Peter Freyther | db65bbd | 2010-07-05 13:58:40 +0800 | [diff] [blame] | 295 | queue_for_msc(msc_con, msg); |
Holger Hans Peter Freyther | b8a3373 | 2010-04-08 11:28:12 +0200 | [diff] [blame] | 296 | } |
| 297 | |
Holger Hans Peter Freyther | d131b79 | 2010-03-31 07:30:58 +0200 | [diff] [blame] | 298 | static void send_mgcp_reset(struct bsc_connection *bsc) |
| 299 | { |
Holger Hans Peter Freyther | dbd16fe | 2010-07-23 19:08:55 +0800 | [diff] [blame] | 300 | static const uint8_t mgcp_reset[] = { |
Holger Hans Peter Freyther | d131b79 | 2010-03-31 07:30:58 +0200 | [diff] [blame] | 301 | "RSIP 1 13@mgw MGCP 1.0\r\n" |
| 302 | }; |
| 303 | |
| 304 | bsc_write_mgcp(bsc, mgcp_reset, sizeof mgcp_reset - 1); |
| 305 | } |
| 306 | |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 307 | /* |
| 308 | * Below is the handling of messages coming |
| 309 | * from the MSC and need to be forwarded to |
| 310 | * a real BSC. |
| 311 | */ |
Holger Hans Peter Freyther | bec411b | 2010-07-05 14:14:18 +0800 | [diff] [blame] | 312 | static void initialize_msc_if_needed(struct bsc_msc_connection *msc_con) |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 313 | { |
Holger Hans Peter Freyther | bec411b | 2010-07-05 14:14:18 +0800 | [diff] [blame] | 314 | if (msc_con->first_contact) |
Holger Hans Peter Freyther | b752761 | 2010-04-07 11:20:36 +0200 | [diff] [blame] | 315 | return; |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 316 | |
Holger Hans Peter Freyther | bec411b | 2010-07-05 14:14:18 +0800 | [diff] [blame] | 317 | msc_con->first_contact = 1; |
| 318 | msc_send_reset(msc_con); |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 319 | } |
| 320 | |
Holger Hans Peter Freyther | db65bbd | 2010-07-05 13:58:40 +0800 | [diff] [blame] | 321 | static void send_id_get_response(struct bsc_msc_connection *msc_con) |
Holger Hans Peter Freyther | e635dab | 2010-05-15 00:14:58 +0800 | [diff] [blame] | 322 | { |
| 323 | struct msgb *msg = bsc_msc_id_get_resp(nat->token); |
| 324 | if (!msg) |
| 325 | return; |
| 326 | |
| 327 | ipaccess_prepend_header(msg, IPAC_PROTO_IPACCESS); |
Holger Hans Peter Freyther | db65bbd | 2010-07-05 13:58:40 +0800 | [diff] [blame] | 328 | queue_for_msc(msc_con, msg); |
Holger Hans Peter Freyther | e635dab | 2010-05-15 00:14:58 +0800 | [diff] [blame] | 329 | } |
| 330 | |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 331 | /* |
| 332 | * Currently we are lacking refcounting so we need to copy each message. |
| 333 | */ |
Holger Hans Peter Freyther | dbd16fe | 2010-07-23 19:08:55 +0800 | [diff] [blame] | 334 | static void bsc_send_data(struct bsc_connection *bsc, const uint8_t *data, unsigned int length, int proto) |
Holger Hans Peter Freyther | f7cb33c | 2010-03-26 07:20:59 +0100 | [diff] [blame] | 335 | { |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 336 | struct msgb *msg; |
| 337 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 338 | if (length > 4096 - 128) { |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 339 | LOGP(DINP, LOGL_ERROR, "Can not send message of that size.\n"); |
| 340 | return; |
| 341 | } |
| 342 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 343 | msg = msgb_alloc_headroom(4096, 128, "to-bsc"); |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 344 | if (!msg) { |
| 345 | LOGP(DINP, LOGL_ERROR, "Failed to allocate memory for BSC msg.\n"); |
| 346 | return; |
| 347 | } |
| 348 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 349 | msg->l2h = msgb_put(msg, length); |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 350 | memcpy(msg->data, data, length); |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 351 | |
| 352 | bsc_write(bsc, msg, proto); |
Holger Hans Peter Freyther | f7cb33c | 2010-03-26 07:20:59 +0100 | [diff] [blame] | 353 | } |
| 354 | |
Holger Hans Peter Freyther | ac2763b | 2010-09-15 07:43:59 +0800 | [diff] [blame] | 355 | /* |
Holger Hans Peter Freyther | ee88496 | 2010-09-25 17:58:22 +0800 | [diff] [blame] | 356 | * Update the release statistics |
| 357 | */ |
| 358 | static void bsc_stat_reject(int filter, struct bsc_connection *bsc, int normal) |
| 359 | { |
| 360 | if (!bsc->cfg) { |
| 361 | LOGP(DNAT, LOGL_ERROR, "BSC is not authenticated."); |
| 362 | return; |
| 363 | } |
| 364 | |
| 365 | if (filter >= 0) { |
| 366 | LOGP(DNAT, LOGL_ERROR, "Connection was not rejected"); |
| 367 | return; |
| 368 | } |
| 369 | |
| 370 | if (filter == -1) |
| 371 | rate_ctr_inc(&bsc->cfg->stats.ctrg->ctr[BCFG_CTR_ILL_PACKET]); |
| 372 | else if (normal) |
| 373 | rate_ctr_inc(&bsc->cfg->stats.ctrg->ctr[BCFG_CTR_REJECTED_MSG]); |
| 374 | else |
| 375 | rate_ctr_inc(&bsc->cfg->stats.ctrg->ctr[BCFG_CTR_REJECTED_CR]); |
| 376 | } |
| 377 | |
| 378 | /* |
Holger Hans Peter Freyther | ac2763b | 2010-09-15 07:43:59 +0800 | [diff] [blame] | 379 | * Release an established connection. We will have to release it to the BSC |
| 380 | * and to the network and we do it the following way. |
| 381 | * 1.) Give up on the MSC side |
| 382 | * 1.1) Send a RLSD message, it is a bit non standard but should work, we |
| 383 | * ignore the RLC... we might complain about it. Other options would |
| 384 | * be to send a Release Request, handle the Release Complete.. |
| 385 | * 1.2) Mark the data structure to be con_local and wait for 2nd |
| 386 | * |
| 387 | * 2.) Give up on the BSC side |
| 388 | * 2.1) Depending on the con type reject the service, or just close it |
| 389 | */ |
| 390 | static void bsc_send_con_release(struct bsc_connection *bsc, struct sccp_connections *con) |
| 391 | { |
| 392 | struct msgb *rlsd; |
| 393 | /* 1. release the network */ |
| 394 | rlsd = sccp_create_rlsd(&con->patched_ref, &con->remote_ref, |
| 395 | SCCP_RELEASE_CAUSE_END_USER_ORIGINATED); |
| 396 | if (!rlsd) |
| 397 | LOGP(DNAT, LOGL_ERROR, "Failed to create RLSD message.\n"); |
| 398 | else { |
| 399 | ipaccess_prepend_header(rlsd, IPAC_PROTO_SCCP); |
| 400 | queue_for_msc(con->msc_con, rlsd); |
| 401 | } |
| 402 | con->con_local = 1; |
Holger Hans Peter Freyther | eea5a1b | 2010-09-16 06:41:09 +0800 | [diff] [blame] | 403 | con->msc_con = NULL; |
Holger Hans Peter Freyther | ac2763b | 2010-09-15 07:43:59 +0800 | [diff] [blame] | 404 | |
| 405 | /* 2. release the BSC side */ |
| 406 | if (con->con_type == NAT_CON_TYPE_LU) { |
| 407 | struct msgb *payload, *udt; |
| 408 | payload = gsm48_create_loc_upd_rej(GSM48_REJECT_PLMN_NOT_ALLOWED); |
| 409 | |
| 410 | if (payload) { |
| 411 | gsm0808_prepend_dtap_header(payload, 0); |
| 412 | udt = sccp_create_dt1(&con->real_ref, payload->data, payload->len); |
| 413 | if (udt) |
| 414 | bsc_write(bsc, udt, IPAC_PROTO_SCCP); |
| 415 | else |
| 416 | LOGP(DNAT, LOGL_ERROR, "Failed to create DT1\n"); |
| 417 | |
| 418 | msgb_free(payload); |
| 419 | } else { |
| 420 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate LU Reject.\n"); |
| 421 | } |
| 422 | } |
| 423 | |
Holger Hans Peter Freyther | 43eb1a3 | 2010-10-29 17:05:28 +0200 | [diff] [blame] | 424 | nat_send_clrc_bsc(con); |
| 425 | |
Holger Hans Peter Freyther | ac2763b | 2010-09-15 07:43:59 +0800 | [diff] [blame] | 426 | rlsd = sccp_create_rlsd(&con->remote_ref, &con->real_ref, |
| 427 | SCCP_RELEASE_CAUSE_END_USER_ORIGINATED); |
| 428 | if (!rlsd) { |
| 429 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate RLSD for the BSC.\n"); |
| 430 | sccp_connection_destroy(con); |
| 431 | return; |
| 432 | } |
| 433 | |
| 434 | con->con_type = NAT_CON_TYPE_LOCAL_REJECT; |
| 435 | bsc_write(bsc, rlsd, IPAC_PROTO_SCCP); |
| 436 | } |
| 437 | |
Holger Hans Peter Freyther | 91246d7 | 2010-05-16 02:20:26 +0800 | [diff] [blame] | 438 | static void bsc_send_con_refuse(struct bsc_connection *bsc, |
| 439 | struct bsc_nat_parsed *parsed, int con_type) |
| 440 | { |
Holger Hans Peter Freyther | ed775e4 | 2010-06-15 18:52:24 +0800 | [diff] [blame] | 441 | struct msgb *payload; |
Holger Hans Peter Freyther | 91246d7 | 2010-05-16 02:20:26 +0800 | [diff] [blame] | 442 | struct msgb *refuse; |
Holger Hans Peter Freyther | ed775e4 | 2010-06-15 18:52:24 +0800 | [diff] [blame] | 443 | |
Holger Hans Peter Freyther | b71c23b | 2010-05-16 20:43:52 +0800 | [diff] [blame] | 444 | if (con_type == NAT_CON_TYPE_LU) |
Holger Hans Peter Freyther | ed775e4 | 2010-06-15 18:52:24 +0800 | [diff] [blame] | 445 | payload = gsm48_create_loc_upd_rej(GSM48_REJECT_PLMN_NOT_ALLOWED); |
Holger Hans Peter Freyther | b71c23b | 2010-05-16 20:43:52 +0800 | [diff] [blame] | 446 | else if (con_type == NAT_CON_TYPE_CM_SERV_REQ) |
Holger Hans Peter Freyther | ed775e4 | 2010-06-15 18:52:24 +0800 | [diff] [blame] | 447 | payload = gsm48_create_mm_serv_rej(GSM48_REJECT_PLMN_NOT_ALLOWED); |
Holger Hans Peter Freyther | 8d7b10e | 2010-07-23 19:43:12 +0800 | [diff] [blame] | 448 | else { |
| 449 | LOGP(DNAT, LOGL_ERROR, "Unknown connection type: %d\n", con_type); |
| 450 | payload = NULL; |
| 451 | } |
Holger Hans Peter Freyther | b71c23b | 2010-05-16 20:43:52 +0800 | [diff] [blame] | 452 | |
| 453 | /* |
| 454 | * Some BSCs do not handle the payload inside a SCCP CREF msg |
| 455 | * so we will need to: |
| 456 | * 1.) Allocate a local connection and mark it as local.. |
| 457 | * 2.) queue data for downstream.. and the RLC should delete everything |
| 458 | */ |
| 459 | if (payload) { |
Holger Hans Peter Freyther | 43eb1a3 | 2010-10-29 17:05:28 +0200 | [diff] [blame] | 460 | struct msgb *cc, *udt, *clear, *rlsd; |
Holger Hans Peter Freyther | b71c23b | 2010-05-16 20:43:52 +0800 | [diff] [blame] | 461 | struct sccp_connections *con; |
| 462 | con = create_sccp_src_ref(bsc, parsed); |
| 463 | if (!con) |
| 464 | goto send_refuse; |
| 465 | |
| 466 | /* declare it local and assign a unique remote_ref */ |
| 467 | con->con_type = NAT_CON_TYPE_LOCAL_REJECT; |
| 468 | con->con_local = 1; |
| 469 | con->has_remote_ref = 1; |
| 470 | con->remote_ref = con->patched_ref; |
| 471 | |
| 472 | /* 1. create a confirmation */ |
| 473 | cc = sccp_create_cc(&con->remote_ref, &con->real_ref); |
| 474 | if (!cc) |
| 475 | goto send_refuse; |
| 476 | |
| 477 | /* 2. create the DT1 */ |
Holger Hans Peter Freyther | ed775e4 | 2010-06-15 18:52:24 +0800 | [diff] [blame] | 478 | gsm0808_prepend_dtap_header(payload, 0); |
Holger Hans Peter Freyther | b71c23b | 2010-05-16 20:43:52 +0800 | [diff] [blame] | 479 | udt = sccp_create_dt1(&con->real_ref, payload->data, payload->len); |
| 480 | if (!udt) { |
| 481 | msgb_free(cc); |
| 482 | goto send_refuse; |
| 483 | } |
| 484 | |
Holger Hans Peter Freyther | 43eb1a3 | 2010-10-29 17:05:28 +0200 | [diff] [blame] | 485 | /* 3. send a Clear Command */ |
| 486 | clear = nat_creat_clrc(con, 0x20); |
| 487 | if (!clear) { |
Holger Hans Peter Freyther | b71c23b | 2010-05-16 20:43:52 +0800 | [diff] [blame] | 488 | msgb_free(cc); |
| 489 | msgb_free(udt); |
| 490 | goto send_refuse; |
| 491 | } |
| 492 | |
Holger Hans Peter Freyther | 43eb1a3 | 2010-10-29 17:05:28 +0200 | [diff] [blame] | 493 | /* 4. send a RLSD */ |
| 494 | rlsd = sccp_create_rlsd(&con->remote_ref, &con->real_ref, |
| 495 | SCCP_RELEASE_CAUSE_END_USER_ORIGINATED); |
| 496 | if (!rlsd) { |
| 497 | msgb_free(cc); |
| 498 | msgb_free(udt); |
| 499 | msgb_free(clear); |
| 500 | goto send_refuse; |
| 501 | } |
| 502 | |
Holger Hans Peter Freyther | b71c23b | 2010-05-16 20:43:52 +0800 | [diff] [blame] | 503 | bsc_write(bsc, cc, IPAC_PROTO_SCCP); |
| 504 | bsc_write(bsc, udt, IPAC_PROTO_SCCP); |
Holger Hans Peter Freyther | 43eb1a3 | 2010-10-29 17:05:28 +0200 | [diff] [blame] | 505 | bsc_write(bsc, clear, IPAC_PROTO_SCCP); |
Holger Hans Peter Freyther | b71c23b | 2010-05-16 20:43:52 +0800 | [diff] [blame] | 506 | bsc_write(bsc, rlsd, IPAC_PROTO_SCCP); |
| 507 | msgb_free(payload); |
| 508 | return; |
Holger Hans Peter Freyther | ed775e4 | 2010-06-15 18:52:24 +0800 | [diff] [blame] | 509 | } |
| 510 | |
Holger Hans Peter Freyther | ed775e4 | 2010-06-15 18:52:24 +0800 | [diff] [blame] | 511 | |
Holger Hans Peter Freyther | b71c23b | 2010-05-16 20:43:52 +0800 | [diff] [blame] | 512 | send_refuse: |
Holger Hans Peter Freyther | ed775e4 | 2010-06-15 18:52:24 +0800 | [diff] [blame] | 513 | if (payload) |
| 514 | msgb_free(payload); |
| 515 | |
Holger Hans Peter Freyther | b71c23b | 2010-05-16 20:43:52 +0800 | [diff] [blame] | 516 | refuse = sccp_create_refuse(parsed->src_local_ref, |
| 517 | SCCP_REFUSAL_SCCP_FAILURE, NULL, 0); |
Holger Hans Peter Freyther | 91246d7 | 2010-05-16 02:20:26 +0800 | [diff] [blame] | 518 | if (!refuse) { |
| 519 | LOGP(DNAT, LOGL_ERROR, |
| 520 | "Creating refuse msg failed for SCCP 0x%x on BSC Nr: %d.\n", |
| 521 | sccp_src_ref_to_int(parsed->src_local_ref), bsc->cfg->nr); |
| 522 | return; |
| 523 | } |
| 524 | |
| 525 | bsc_write(bsc, refuse, IPAC_PROTO_SCCP); |
| 526 | } |
| 527 | |
| 528 | |
Holger Hans Peter Freyther | db65bbd | 2010-07-05 13:58:40 +0800 | [diff] [blame] | 529 | static int forward_sccp_to_bts(struct bsc_msc_connection *msc_con, struct msgb *msg) |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 530 | { |
Holger Hans Peter Freyther | 8d7b10e | 2010-07-23 19:43:12 +0800 | [diff] [blame] | 531 | struct sccp_connections *con = NULL; |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 532 | struct bsc_connection *bsc; |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 533 | struct bsc_nat_parsed *parsed; |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 534 | int proto; |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 535 | |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 536 | /* filter, drop, patch the message? */ |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 537 | parsed = bsc_nat_parse(msg); |
| 538 | if (!parsed) { |
| 539 | LOGP(DNAT, LOGL_ERROR, "Can not parse msg from BSC.\n"); |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 540 | return -1; |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 541 | } |
| 542 | |
Holger Hans Peter Freyther | 1d6fb18 | 2010-01-30 11:53:30 +0100 | [diff] [blame] | 543 | if (bsc_nat_filter_ipa(DIR_BSC, msg, parsed)) |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 544 | goto exit; |
Holger Hans Peter Freyther | 6a97b8d | 2010-06-15 18:45:26 +0800 | [diff] [blame] | 545 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 546 | proto = parsed->ipa_proto; |
| 547 | |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 548 | /* Route and modify the SCCP packet */ |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 549 | if (proto == IPAC_PROTO_SCCP) { |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 550 | switch (parsed->sccp_type) { |
| 551 | case SCCP_MSG_TYPE_UDT: |
| 552 | /* forward UDT messages to every BSC */ |
| 553 | goto send_to_all; |
| 554 | break; |
| 555 | case SCCP_MSG_TYPE_RLSD: |
| 556 | case SCCP_MSG_TYPE_CREF: |
| 557 | case SCCP_MSG_TYPE_DT1: |
Holger Hans Peter Freyther | f46ce53 | 2010-04-06 10:22:34 +0200 | [diff] [blame] | 558 | case SCCP_MSG_TYPE_IT: |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 559 | con = patch_sccp_src_ref_to_bsc(msg, parsed, nat); |
Holger Hans Peter Freyther | 465313e | 2010-06-15 18:49:53 +0800 | [diff] [blame] | 560 | if (parsed->gsm_type == BSS_MAP_MSG_ASSIGMENT_RQST) { |
Holger Hans Peter Freyther | d470286 | 2010-04-12 12:17:09 +0200 | [diff] [blame] | 561 | counter_inc(nat->stats.sccp.calls); |
| 562 | |
Holger Hans Peter Freyther | 465313e | 2010-06-15 18:49:53 +0800 | [diff] [blame] | 563 | if (con) { |
Holger Hans Peter Freyther | b2c38eb | 2010-06-17 18:16:00 +0800 | [diff] [blame] | 564 | struct rate_ctr_group *ctrg; |
| 565 | ctrg = con->bsc->cfg->stats.ctrg; |
| 566 | rate_ctr_inc(&ctrg->ctr[BCFG_CTR_SCCP_CALLS]); |
Holger Hans Peter Freyther | 45fd07d | 2010-08-28 18:22:14 +0800 | [diff] [blame] | 567 | if (bsc_mgcp_assign_patch(con, msg) != 0) |
Holger Hans Peter Freyther | 465313e | 2010-06-15 18:49:53 +0800 | [diff] [blame] | 568 | LOGP(DNAT, LOGL_ERROR, "Failed to assign...\n"); |
| 569 | } else |
| 570 | LOGP(DNAT, LOGL_ERROR, "Assignment command but no BSC.\n"); |
| 571 | } |
Holger Hans Peter Freyther | 16a6f70 | 2010-03-29 17:18:42 +0200 | [diff] [blame] | 572 | break; |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 573 | case SCCP_MSG_TYPE_CC: |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 574 | con = patch_sccp_src_ref_to_bsc(msg, parsed, nat); |
| 575 | if (!con || update_sccp_src_ref(con, parsed) != 0) |
Holger Hans Peter Freyther | 16a6f70 | 2010-03-29 17:18:42 +0200 | [diff] [blame] | 576 | goto exit; |
Holger Hans Peter Freyther | 0ab6bab | 2010-06-15 18:47:49 +0800 | [diff] [blame] | 577 | break; |
| 578 | case SCCP_MSG_TYPE_RLC: |
| 579 | LOGP(DNAT, LOGL_ERROR, "Unexpected release complete from MSC.\n"); |
| 580 | goto exit; |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 581 | break; |
| 582 | case SCCP_MSG_TYPE_CR: |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 583 | /* MSC never opens a SCCP connection, fall through */ |
| 584 | default: |
| 585 | goto exit; |
| 586 | } |
Holger Hans Peter Freyther | f464ea5 | 2010-04-06 16:07:44 +0200 | [diff] [blame] | 587 | |
Holger Hans Peter Freyther | b8a3373 | 2010-04-08 11:28:12 +0200 | [diff] [blame] | 588 | if (!con && parsed->sccp_type == SCCP_MSG_TYPE_RLSD) { |
| 589 | LOGP(DNAT, LOGL_NOTICE, "Sending fake RLC on RLSD message to network.\n"); |
| 590 | /* Exchange src/dest for the reply */ |
Holger Hans Peter Freyther | db65bbd | 2010-07-05 13:58:40 +0800 | [diff] [blame] | 591 | nat_send_rlc(msc_con, parsed->dest_local_ref, parsed->src_local_ref); |
Holger Hans Peter Freyther | b8a3373 | 2010-04-08 11:28:12 +0200 | [diff] [blame] | 592 | } else if (!con) |
Holger Hans Peter Freyther | 5f10c6d | 2010-05-15 19:13:52 +0800 | [diff] [blame] | 593 | LOGP(DNAT, LOGL_ERROR, "Unknown connection for msg type: 0x%x from the MSC.\n", parsed->sccp_type); |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 594 | } |
| 595 | |
| 596 | talloc_free(parsed); |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 597 | if (!con) |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 598 | return -1; |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 599 | if (!con->bsc->authenticated) { |
Holger Hans Peter Freyther | 6c45f2e | 2010-06-15 19:06:18 +0800 | [diff] [blame] | 600 | LOGP(DNAT, LOGL_ERROR, "Selected BSC not authenticated.\n"); |
Holger Hans Peter Freyther | 3f37b8f | 2010-02-08 23:24:32 +0100 | [diff] [blame] | 601 | return -1; |
| 602 | } |
| 603 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 604 | bsc_send_data(con->bsc, msg->l2h, msgb_l2len(msg), proto); |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 605 | return 0; |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 606 | |
| 607 | send_to_all: |
Holger Hans Peter Freyther | 45d1181 | 2010-06-15 18:46:36 +0800 | [diff] [blame] | 608 | /* |
| 609 | * Filter Paging from the network. We do not want to send a PAGING |
| 610 | * Command to every BSC in our network. We will analys the PAGING |
| 611 | * message and then send it to the authenticated messages... |
| 612 | */ |
| 613 | if (parsed->ipa_proto == IPAC_PROTO_SCCP && parsed->gsm_type == BSS_MAP_MSG_PAGING) { |
Holger Hans Peter Freyther | 979a309 | 2010-04-17 08:07:19 +0200 | [diff] [blame] | 614 | int lac; |
| 615 | bsc = bsc_nat_find_bsc(nat, msg, &lac); |
Holger Hans Peter Freyther | 62e5843 | 2010-04-21 19:05:14 +0800 | [diff] [blame] | 616 | if (bsc && bsc->cfg->forbid_paging) |
Holger Hans Peter Freyther | a34585e | 2010-04-21 20:17:18 +0800 | [diff] [blame] | 617 | LOGP(DNAT, LOGL_DEBUG, "Paging forbidden for BTS: %d\n", bsc->cfg->nr); |
Holger Hans Peter Freyther | 62e5843 | 2010-04-21 19:05:14 +0800 | [diff] [blame] | 618 | else if (bsc) |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 619 | bsc_send_data(bsc, msg->l2h, msgb_l2len(msg), parsed->ipa_proto); |
Holger Hans Peter Freyther | da34063 | 2010-08-06 20:15:40 +0800 | [diff] [blame] | 620 | else if (lac != -1) |
Holger Hans Peter Freyther | 979a309 | 2010-04-17 08:07:19 +0200 | [diff] [blame] | 621 | LOGP(DNAT, LOGL_ERROR, "Could not determine BSC for paging on lac: %d/0x%x\n", |
| 622 | lac, lac); |
Holger Hans Peter Freyther | 45d1181 | 2010-06-15 18:46:36 +0800 | [diff] [blame] | 623 | |
| 624 | goto exit; |
| 625 | } |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 626 | /* currently send this to every BSC connected */ |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 627 | llist_for_each_entry(bsc, &nat->bsc_connections, list_entry) { |
Holger Hans Peter Freyther | 3f37b8f | 2010-02-08 23:24:32 +0100 | [diff] [blame] | 628 | if (!bsc->authenticated) |
| 629 | continue; |
| 630 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 631 | bsc_send_data(bsc, msg->l2h, msgb_l2len(msg), parsed->ipa_proto); |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 632 | } |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 633 | |
| 634 | exit: |
| 635 | talloc_free(parsed); |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 636 | return 0; |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 637 | } |
| 638 | |
Holger Hans Peter Freyther | baf2abe | 2010-06-15 18:47:29 +0800 | [diff] [blame] | 639 | static void msc_connection_was_lost(struct bsc_msc_connection *con) |
| 640 | { |
Holger Hans Peter Freyther | cd89537 | 2010-03-29 08:04:09 +0200 | [diff] [blame] | 641 | struct bsc_connection *bsc, *tmp; |
| 642 | |
| 643 | LOGP(DMSC, LOGL_ERROR, "Closing all connections downstream.\n"); |
| 644 | llist_for_each_entry_safe(bsc, tmp, &nat->bsc_connections, list_entry) |
Holger Hans Peter Freyther | 2f9dcf0 | 2010-04-27 13:21:39 +0800 | [diff] [blame] | 645 | bsc_close_connection(bsc); |
Holger Hans Peter Freyther | cd89537 | 2010-03-29 08:04:09 +0200 | [diff] [blame] | 646 | |
Holger Hans Peter Freyther | 241e130 | 2010-03-31 09:16:56 +0200 | [diff] [blame] | 647 | bsc_mgcp_free_endpoints(nat); |
Holger Hans Peter Freyther | cd89537 | 2010-03-29 08:04:09 +0200 | [diff] [blame] | 648 | bsc_msc_schedule_connect(con); |
Holger Hans Peter Freyther | baf2abe | 2010-06-15 18:47:29 +0800 | [diff] [blame] | 649 | } |
| 650 | |
Holger Hans Peter Freyther | a99c5b9 | 2010-08-04 02:31:55 +0800 | [diff] [blame] | 651 | static void msc_connection_connected(struct bsc_msc_connection *con) |
| 652 | { |
| 653 | counter_inc(nat->stats.msc.reconn); |
| 654 | } |
| 655 | |
Holger Hans Peter Freyther | 02aee14 | 2010-04-08 10:31:07 +0200 | [diff] [blame] | 656 | static void msc_send_reset(struct bsc_msc_connection *msc_con) |
Holger Hans Peter Freyther | af0ff6c | 2010-04-07 10:46:30 +0200 | [diff] [blame] | 657 | { |
Holger Hans Peter Freyther | dbd16fe | 2010-07-23 19:08:55 +0800 | [diff] [blame] | 658 | static const uint8_t reset[] = { |
Holger Hans Peter Freyther | 7cab166 | 2010-04-07 11:11:11 +0200 | [diff] [blame] | 659 | 0x00, 0x12, 0xfd, |
Holger Hans Peter Freyther | af0ff6c | 2010-04-07 10:46:30 +0200 | [diff] [blame] | 660 | 0x09, 0x00, 0x03, 0x05, 0x07, 0x02, 0x42, 0xfe, |
| 661 | 0x02, 0x42, 0xfe, 0x06, 0x00, 0x04, 0x30, 0x04, |
| 662 | 0x01, 0x20 |
| 663 | }; |
| 664 | |
| 665 | struct msgb *msg; |
| 666 | |
| 667 | msg = msgb_alloc_headroom(4096, 128, "08.08 reset"); |
| 668 | if (!msg) { |
| 669 | LOGP(DMSC, LOGL_ERROR, "Failed to allocate reset msg.\n"); |
| 670 | return; |
| 671 | } |
| 672 | |
| 673 | msg->l2h = msgb_put(msg, sizeof(reset)); |
| 674 | memcpy(msg->l2h, reset, msgb_l2len(msg)); |
| 675 | |
Holger Hans Peter Freyther | db65bbd | 2010-07-05 13:58:40 +0800 | [diff] [blame] | 676 | queue_for_msc(msc_con, msg); |
Holger Hans Peter Freyther | af0ff6c | 2010-04-07 10:46:30 +0200 | [diff] [blame] | 677 | |
| 678 | LOGP(DMSC, LOGL_NOTICE, "Scheduled GSM0808 reset msg for the MSC.\n"); |
| 679 | } |
| 680 | |
Holger Hans Peter Freyther | 6f5fbfd | 2010-06-15 18:47:02 +0800 | [diff] [blame] | 681 | static int ipaccess_msc_read_cb(struct bsc_fd *bfd) |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 682 | { |
| 683 | int error; |
Holger Hans Peter Freyther | bec411b | 2010-07-05 14:14:18 +0800 | [diff] [blame] | 684 | struct bsc_msc_connection *msc_con; |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 685 | struct msgb *msg = ipaccess_read_msg(bfd, &error); |
| 686 | struct ipaccess_head *hh; |
| 687 | |
Holger Hans Peter Freyther | bec411b | 2010-07-05 14:14:18 +0800 | [diff] [blame] | 688 | msc_con = (struct bsc_msc_connection *) bfd->data; |
| 689 | |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 690 | if (!msg) { |
Holger Hans Peter Freyther | 9db7843 | 2010-04-23 00:23:03 +0800 | [diff] [blame] | 691 | if (error == 0) |
Holger Hans Peter Freyther | 418f394 | 2010-01-29 05:58:43 +0100 | [diff] [blame] | 692 | LOGP(DNAT, LOGL_FATAL, "The connection the MSC was lost, exiting\n"); |
Holger Hans Peter Freyther | 9db7843 | 2010-04-23 00:23:03 +0800 | [diff] [blame] | 693 | else |
| 694 | LOGP(DNAT, LOGL_ERROR, "Failed to parse ip access message: %d\n", error); |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 695 | |
Holger Hans Peter Freyther | bec411b | 2010-07-05 14:14:18 +0800 | [diff] [blame] | 696 | bsc_msc_lost(msc_con); |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 697 | return -1; |
| 698 | } |
| 699 | |
Holger Hans Peter Freyther | 418f394 | 2010-01-29 05:58:43 +0100 | [diff] [blame] | 700 | LOGP(DNAT, LOGL_DEBUG, "MSG from MSC: %s proto: %d\n", hexdump(msg->data, msg->len), msg->l2h[0]); |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 701 | |
| 702 | /* handle base message handling */ |
| 703 | hh = (struct ipaccess_head *) msg->data; |
| 704 | ipaccess_rcvmsg_base(msg, bfd); |
| 705 | |
| 706 | /* initialize the networking. This includes sending a GSM08.08 message */ |
Holger Hans Peter Freyther | e635dab | 2010-05-15 00:14:58 +0800 | [diff] [blame] | 707 | if (hh->proto == IPAC_PROTO_IPACCESS) { |
| 708 | if (msg->l2h[0] == IPAC_MSGT_ID_ACK) |
Holger Hans Peter Freyther | bec411b | 2010-07-05 14:14:18 +0800 | [diff] [blame] | 709 | initialize_msc_if_needed(msc_con); |
Holger Hans Peter Freyther | e635dab | 2010-05-15 00:14:58 +0800 | [diff] [blame] | 710 | else if (msg->l2h[0] == IPAC_MSGT_ID_GET) |
Holger Hans Peter Freyther | bec411b | 2010-07-05 14:14:18 +0800 | [diff] [blame] | 711 | send_id_get_response(msc_con); |
Holger Hans Peter Freyther | e635dab | 2010-05-15 00:14:58 +0800 | [diff] [blame] | 712 | } else if (hh->proto == IPAC_PROTO_SCCP) |
Holger Hans Peter Freyther | bec411b | 2010-07-05 14:14:18 +0800 | [diff] [blame] | 713 | forward_sccp_to_bts(msc_con, msg); |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 714 | |
Holger Hans Peter Freyther | aad68b5 | 2010-06-15 18:46:48 +0800 | [diff] [blame] | 715 | msgb_free(msg); |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 716 | return 0; |
| 717 | } |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 718 | |
Holger Hans Peter Freyther | 6f5fbfd | 2010-06-15 18:47:02 +0800 | [diff] [blame] | 719 | static int ipaccess_msc_write_cb(struct bsc_fd *bfd, struct msgb *msg) |
| 720 | { |
| 721 | int rc; |
| 722 | rc = write(bfd->fd, msg->data, msg->len); |
| 723 | |
| 724 | if (rc != msg->len) { |
| 725 | LOGP(DNAT, LOGL_ERROR, "Failed to write MSG to MSC.\n"); |
| 726 | return -1; |
| 727 | } |
| 728 | |
| 729 | return rc; |
| 730 | } |
| 731 | |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 732 | /* |
| 733 | * Below is the handling of messages coming |
| 734 | * from the BSC and need to be forwarded to |
| 735 | * a real BSC. |
| 736 | */ |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 737 | |
| 738 | /* |
| 739 | * Remove the connection from the connections list, |
| 740 | * remove it from the patching of SCCP header lists |
| 741 | * as well. Maybe in the future even close connection.. |
| 742 | */ |
Holger Hans Peter Freyther | 2f9dcf0 | 2010-04-27 13:21:39 +0800 | [diff] [blame] | 743 | void bsc_close_connection(struct bsc_connection *connection) |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 744 | { |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 745 | struct sccp_connections *sccp_patch, *tmp; |
Holger Hans Peter Freyther | 8330c1c | 2010-06-17 18:29:42 +0800 | [diff] [blame] | 746 | struct rate_ctr *ctr = NULL; |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 747 | |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 748 | /* stop the timeout timer */ |
| 749 | bsc_del_timer(&connection->id_timeout); |
Holger Hans Peter Freyther | 906c15e | 2010-05-02 19:28:59 +0800 | [diff] [blame] | 750 | bsc_del_timer(&connection->ping_timeout); |
| 751 | bsc_del_timer(&connection->pong_timeout); |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 752 | |
Holger Hans Peter Freyther | 8330c1c | 2010-06-17 18:29:42 +0800 | [diff] [blame] | 753 | if (connection->cfg) |
| 754 | ctr = &connection->cfg->stats.ctrg->ctr[BCFG_CTR_DROPPED_SCCP]; |
| 755 | |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 756 | /* remove all SCCP connections */ |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 757 | llist_for_each_entry_safe(sccp_patch, tmp, &nat->sccp_connections, list_entry) { |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 758 | if (sccp_patch->bsc != connection) |
| 759 | continue; |
| 760 | |
Holger Hans Peter Freyther | 8330c1c | 2010-06-17 18:29:42 +0800 | [diff] [blame] | 761 | if (ctr) |
| 762 | rate_ctr_inc(ctr); |
Holger Hans Peter Freyther | eea5a1b | 2010-09-16 06:41:09 +0800 | [diff] [blame] | 763 | if (sccp_patch->has_remote_ref && !sccp_patch->con_local) |
Holger Hans Peter Freyther | 07dfc70 | 2010-10-27 10:54:11 +0200 | [diff] [blame] | 764 | nat_send_rlsd_msc(sccp_patch); |
Holger Hans Peter Freyther | 23fe7be | 2010-03-30 10:45:48 +0200 | [diff] [blame] | 765 | sccp_connection_destroy(sccp_patch); |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 766 | } |
| 767 | |
Holger Hans Peter Freyther | 26a4389 | 2010-04-05 23:09:27 +0200 | [diff] [blame] | 768 | /* close endpoints allocated by this BSC */ |
| 769 | bsc_mgcp_clear_endpoints_for(connection); |
| 770 | |
Holger Hans Peter Freyther | e464ed4 | 2010-04-22 12:04:36 +0800 | [diff] [blame] | 771 | bsc_unregister_fd(&connection->write_queue.bfd); |
| 772 | close(connection->write_queue.bfd.fd); |
| 773 | write_queue_clear(&connection->write_queue); |
| 774 | llist_del(&connection->list_entry); |
| 775 | |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 776 | talloc_free(connection); |
| 777 | } |
| 778 | |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 779 | static void ipaccess_close_bsc(void *data) |
| 780 | { |
Holger Hans Peter Freyther | 6d5a600 | 2010-04-17 07:58:17 +0200 | [diff] [blame] | 781 | struct sockaddr_in sock; |
| 782 | socklen_t len = sizeof(sock); |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 783 | struct bsc_connection *conn = data; |
| 784 | |
Holger Hans Peter Freyther | 6d5a600 | 2010-04-17 07:58:17 +0200 | [diff] [blame] | 785 | |
| 786 | getpeername(conn->write_queue.bfd.fd, (struct sockaddr *) &sock, &len); |
| 787 | LOGP(DNAT, LOGL_ERROR, "BSC on %s didn't respond to identity request. Closing.\n", |
| 788 | inet_ntoa(sock.sin_addr)); |
Holger Hans Peter Freyther | 2f9dcf0 | 2010-04-27 13:21:39 +0800 | [diff] [blame] | 789 | bsc_close_connection(conn); |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 790 | } |
| 791 | |
| 792 | static void ipaccess_auth_bsc(struct tlv_parsed *tvp, struct bsc_connection *bsc) |
| 793 | { |
| 794 | struct bsc_config *conf; |
Holger Hans Peter Freyther | adb6e1c | 2010-09-18 06:44:24 +0800 | [diff] [blame] | 795 | const char *token = (const char *) TLVP_VAL(tvp, IPAC_IDTAG_UNITNAME); |
Holger Hans Peter Freyther | a09b966 | 2010-10-14 17:19:58 +0200 | [diff] [blame] | 796 | const int len = TLVP_LEN(tvp, IPAC_IDTAG_UNITNAME); |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 797 | |
Holger Hans Peter Freyther | 5cdcfa6 | 2010-05-02 18:58:10 +0800 | [diff] [blame] | 798 | if (bsc->cfg) { |
| 799 | LOGP(DNAT, LOGL_ERROR, "Reauth on fd %d bsc nr %d\n", |
| 800 | bsc->write_queue.bfd.fd, bsc->cfg->nr); |
| 801 | return; |
| 802 | } |
| 803 | |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 804 | llist_for_each_entry(conf, &bsc->nat->bsc_configs, entry) { |
Holger Hans Peter Freyther | a09b966 | 2010-10-14 17:19:58 +0200 | [diff] [blame] | 805 | if (strncmp(conf->token, token, len) == 0) { |
Holger Hans Peter Freyther | b2c38eb | 2010-06-17 18:16:00 +0800 | [diff] [blame] | 806 | rate_ctr_inc(&conf->stats.ctrg->ctr[BCFG_CTR_NET_RECONN]); |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 807 | bsc->authenticated = 1; |
Holger Hans Peter Freyther | 47dd494 | 2010-04-06 15:11:34 +0200 | [diff] [blame] | 808 | bsc->cfg = conf; |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 809 | bsc_del_timer(&bsc->id_timeout); |
Holger Hans Peter Freyther | 0bd60f3 | 2010-10-08 22:08:29 +0800 | [diff] [blame] | 810 | LOGP(DNAT, LOGL_NOTICE, "Authenticated bsc nr: %d on fd %d\n", |
| 811 | conf->nr, bsc->write_queue.bfd.fd); |
Holger Hans Peter Freyther | 906c15e | 2010-05-02 19:28:59 +0800 | [diff] [blame] | 812 | start_ping_pong(bsc); |
Holger Hans Peter Freyther | c615c26 | 2010-04-17 07:59:57 +0200 | [diff] [blame] | 813 | return; |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 814 | } |
| 815 | } |
Holger Hans Peter Freyther | c615c26 | 2010-04-17 07:59:57 +0200 | [diff] [blame] | 816 | |
Holger Hans Peter Freyther | 74cfab7 | 2010-05-05 17:03:44 +0800 | [diff] [blame] | 817 | LOGP(DNAT, LOGL_ERROR, "No bsc found for token %s on fd: %d.\n", token, |
| 818 | bsc->write_queue.bfd.fd); |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 819 | } |
| 820 | |
Holger Hans Peter Freyther | 463dc62 | 2010-10-03 19:41:42 +0800 | [diff] [blame] | 821 | static void handle_con_stats(struct sccp_connections *con) |
| 822 | { |
| 823 | struct rate_ctr_group *ctrg; |
| 824 | int id = bsc_conn_type_to_ctr(con); |
| 825 | |
| 826 | if (id == -1) |
| 827 | return; |
| 828 | |
| 829 | if (!con->bsc || !con->bsc->cfg) |
| 830 | return; |
| 831 | |
| 832 | ctrg = con->bsc->cfg->stats.ctrg; |
| 833 | rate_ctr_inc(&ctrg->ctr[id]); |
| 834 | } |
| 835 | |
Holger Hans Peter Freyther | 747d654 | 2010-03-26 07:24:34 +0100 | [diff] [blame] | 836 | static int forward_sccp_to_msc(struct bsc_connection *bsc, struct msgb *msg) |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 837 | { |
Holger Hans Peter Freyther | c58da4b | 2010-05-16 16:36:36 +0800 | [diff] [blame] | 838 | int con_filter = 0; |
Holger Hans Peter Freyther | 749497e | 2010-09-29 01:19:42 +0800 | [diff] [blame] | 839 | char *imsi = NULL; |
Holger Hans Peter Freyther | db65bbd | 2010-07-05 13:58:40 +0800 | [diff] [blame] | 840 | struct bsc_msc_connection *con_msc = NULL; |
Holger Hans Peter Freyther | 605f62a | 2010-05-16 16:30:42 +0800 | [diff] [blame] | 841 | struct bsc_connection *con_bsc = NULL; |
Holger Hans Peter Freyther | 19c0a84 | 2010-05-16 02:00:40 +0800 | [diff] [blame] | 842 | int con_type; |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 843 | struct bsc_nat_parsed *parsed; |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 844 | |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 845 | /* Parse and filter messages */ |
| 846 | parsed = bsc_nat_parse(msg); |
| 847 | if (!parsed) { |
| 848 | LOGP(DNAT, LOGL_ERROR, "Can not parse msg from BSC.\n"); |
Holger Hans Peter Freyther | d7657ff | 2010-03-30 07:35:46 +0200 | [diff] [blame] | 849 | msgb_free(msg); |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 850 | return -1; |
| 851 | } |
| 852 | |
Holger Hans Peter Freyther | 1d6fb18 | 2010-01-30 11:53:30 +0100 | [diff] [blame] | 853 | if (bsc_nat_filter_ipa(DIR_MSC, msg, parsed)) |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 854 | goto exit; |
Holger Hans Peter Freyther | 6a97b8d | 2010-06-15 18:45:26 +0800 | [diff] [blame] | 855 | |
Holger Hans Peter Freyther | bbb9d39 | 2010-04-02 03:42:44 +0200 | [diff] [blame] | 856 | /* |
| 857 | * check authentication after filtering to not reject auth |
| 858 | * responses coming from the BSC. We have to make sure that |
| 859 | * nothing from the exit path will forward things to the MSC |
| 860 | */ |
| 861 | if (!bsc->authenticated) { |
| 862 | LOGP(DNAT, LOGL_ERROR, "BSC is not authenticated.\n"); |
| 863 | msgb_free(msg); |
| 864 | return -1; |
| 865 | } |
| 866 | |
| 867 | |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 868 | /* modify the SCCP entries */ |
| 869 | if (parsed->ipa_proto == IPAC_PROTO_SCCP) { |
Holger Hans Peter Freyther | 3837f99 | 2010-09-15 00:38:54 +0800 | [diff] [blame] | 870 | int filter; |
Holger Hans Peter Freyther | 605f62a | 2010-05-16 16:30:42 +0800 | [diff] [blame] | 871 | struct sccp_connections *con; |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 872 | switch (parsed->sccp_type) { |
| 873 | case SCCP_MSG_TYPE_CR: |
Holger Hans Peter Freyther | 749497e | 2010-09-29 01:19:42 +0800 | [diff] [blame] | 874 | filter = bsc_nat_filter_sccp_cr(bsc, msg, parsed, &con_type, &imsi); |
Holger Hans Peter Freyther | ee88496 | 2010-09-25 17:58:22 +0800 | [diff] [blame] | 875 | if (filter < 0) { |
| 876 | bsc_stat_reject(filter, bsc, 0); |
Holger Hans Peter Freyther | b4af5c9 | 2010-05-14 03:39:56 +0800 | [diff] [blame] | 877 | goto exit3; |
Holger Hans Peter Freyther | ee88496 | 2010-09-25 17:58:22 +0800 | [diff] [blame] | 878 | } |
| 879 | |
Holger Hans Peter Freyther | fa20c94 | 2010-05-16 16:51:31 +0800 | [diff] [blame] | 880 | if (!create_sccp_src_ref(bsc, parsed)) |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 881 | goto exit2; |
Holger Hans Peter Freyther | b5513ca | 2010-04-21 18:56:12 +0800 | [diff] [blame] | 882 | con = patch_sccp_src_ref_to_msc(msg, parsed, bsc); |
Holger Hans Peter Freyther | 3a77e61 | 2010-07-05 13:33:18 +0800 | [diff] [blame] | 883 | con->msc_con = bsc->nat->msc_con; |
Holger Hans Peter Freyther | db65bbd | 2010-07-05 13:58:40 +0800 | [diff] [blame] | 884 | con_msc = con->msc_con; |
Holger Hans Peter Freyther | 234d312 | 2010-05-16 02:06:11 +0800 | [diff] [blame] | 885 | con->con_type = con_type; |
Holger Hans Peter Freyther | 909e61f | 2010-09-15 00:41:19 +0800 | [diff] [blame] | 886 | con->imsi_checked = filter; |
Holger Hans Peter Freyther | 749497e | 2010-09-29 01:19:42 +0800 | [diff] [blame] | 887 | if (imsi) |
| 888 | con->imsi = talloc_steal(con, imsi); |
| 889 | imsi = NULL; |
Holger Hans Peter Freyther | 605f62a | 2010-05-16 16:30:42 +0800 | [diff] [blame] | 890 | con_bsc = con->bsc; |
Holger Hans Peter Freyther | 463dc62 | 2010-10-03 19:41:42 +0800 | [diff] [blame] | 891 | handle_con_stats(con); |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 892 | break; |
| 893 | case SCCP_MSG_TYPE_RLSD: |
| 894 | case SCCP_MSG_TYPE_CREF: |
| 895 | case SCCP_MSG_TYPE_DT1: |
| 896 | case SCCP_MSG_TYPE_CC: |
Holger Hans Peter Freyther | f46ce53 | 2010-04-06 10:22:34 +0200 | [diff] [blame] | 897 | case SCCP_MSG_TYPE_IT: |
Holger Hans Peter Freyther | b5513ca | 2010-04-21 18:56:12 +0800 | [diff] [blame] | 898 | con = patch_sccp_src_ref_to_msc(msg, parsed, bsc); |
Holger Hans Peter Freyther | 605f62a | 2010-05-16 16:30:42 +0800 | [diff] [blame] | 899 | if (con) { |
Holger Hans Peter Freyther | 0c41b69 | 2010-10-06 00:48:36 +0800 | [diff] [blame] | 900 | /* only filter non local connections */ |
| 901 | if (!con->con_local) { |
| 902 | filter = bsc_nat_filter_dt(bsc, msg, con, parsed); |
| 903 | if (filter < 0) { |
| 904 | bsc_stat_reject(filter, bsc, 1); |
| 905 | bsc_send_con_release(bsc, con); |
| 906 | con = NULL; |
| 907 | goto exit2; |
| 908 | } |
Holger Hans Peter Freyther | 17870cf | 2010-09-29 19:32:55 +0800 | [diff] [blame] | 909 | |
| 910 | /* hand data to a side channel */ |
Holger Hans Peter Freyther | 4c401e7 | 2010-10-15 10:09:31 +0200 | [diff] [blame] | 911 | if (bsc_check_ussd(con, parsed, msg) == 1) |
| 912 | con->con_local = 2; |
Holger Hans Peter Freyther | a914daf | 2010-10-21 12:12:57 +0200 | [diff] [blame] | 913 | |
| 914 | /* |
| 915 | * Optionally rewrite setup message. This can |
| 916 | * replace the msg and the parsed structure becomes |
| 917 | * invalid. |
| 918 | */ |
Holger Hans Peter Freyther | 73bbf89 | 2010-10-21 14:46:57 +0200 | [diff] [blame] | 919 | msg = bsc_nat_rewrite_setup(bsc->nat, msg, parsed, con->imsi); |
Holger Hans Peter Freyther | a914daf | 2010-10-21 12:12:57 +0200 | [diff] [blame] | 920 | talloc_free(parsed); |
| 921 | parsed = NULL; |
Holger Hans Peter Freyther | 74e0a1b | 2010-09-15 01:11:08 +0800 | [diff] [blame] | 922 | } |
Holger Hans Peter Freyther | 0c41b69 | 2010-10-06 00:48:36 +0800 | [diff] [blame] | 923 | |
| 924 | con_bsc = con->bsc; |
| 925 | con_msc = con->msc_con; |
| 926 | con_filter = con->con_local; |
Holger Hans Peter Freyther | 605f62a | 2010-05-16 16:30:42 +0800 | [diff] [blame] | 927 | } |
Holger Hans Peter Freyther | 17870cf | 2010-09-29 19:32:55 +0800 | [diff] [blame] | 928 | |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 929 | break; |
| 930 | case SCCP_MSG_TYPE_RLC: |
Holger Hans Peter Freyther | b5513ca | 2010-04-21 18:56:12 +0800 | [diff] [blame] | 931 | con = patch_sccp_src_ref_to_msc(msg, parsed, bsc); |
Holger Hans Peter Freyther | 605f62a | 2010-05-16 16:30:42 +0800 | [diff] [blame] | 932 | if (con) { |
Holger Hans Peter Freyther | 605f62a | 2010-05-16 16:30:42 +0800 | [diff] [blame] | 933 | con_bsc = con->bsc; |
Holger Hans Peter Freyther | db65bbd | 2010-07-05 13:58:40 +0800 | [diff] [blame] | 934 | con_msc = con->msc_con; |
Holger Hans Peter Freyther | c58da4b | 2010-05-16 16:36:36 +0800 | [diff] [blame] | 935 | con_filter = con->con_local; |
Holger Hans Peter Freyther | 605f62a | 2010-05-16 16:30:42 +0800 | [diff] [blame] | 936 | } |
Holger Hans Peter Freyther | f4cfc4f | 2010-03-31 09:15:05 +0200 | [diff] [blame] | 937 | remove_sccp_src_ref(bsc, msg, parsed); |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 938 | break; |
| 939 | case SCCP_MSG_TYPE_UDT: |
| 940 | /* simply forward everything */ |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 941 | con = NULL; |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 942 | break; |
| 943 | default: |
Holger Hans Peter Freyther | 0ab6bab | 2010-06-15 18:47:49 +0800 | [diff] [blame] | 944 | LOGP(DNAT, LOGL_ERROR, "Not forwarding to msc sccp type: 0x%x\n", parsed->sccp_type); |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 945 | con = NULL; |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 946 | goto exit2; |
| 947 | break; |
| 948 | } |
Holger Hans Peter Freyther | 368a0a7 | 2011-01-07 16:54:46 +0100 | [diff] [blame] | 949 | } else if (parsed->ipa_proto == IPAC_PROTO_MGCP_OLD) { |
Holger Hans Peter Freyther | 3c3bce1 | 2010-04-01 10:16:28 +0200 | [diff] [blame] | 950 | bsc_mgcp_forward(bsc, msg); |
| 951 | goto exit2; |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 952 | } else { |
| 953 | LOGP(DNAT, LOGL_ERROR, "Not forwarding unknown stream id: 0x%x\n", parsed->ipa_proto); |
| 954 | goto exit2; |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 955 | } |
| 956 | |
Holger Hans Peter Freyther | db65bbd | 2010-07-05 13:58:40 +0800 | [diff] [blame] | 957 | if (con_msc && con_bsc != bsc) { |
Holger Hans Peter Freyther | ca0c2f9 | 2010-04-21 18:49:55 +0800 | [diff] [blame] | 958 | LOGP(DNAT, LOGL_ERROR, "The connection belongs to a different BTS: input: %d con: %d\n", |
Holger Hans Peter Freyther | 605f62a | 2010-05-16 16:30:42 +0800 | [diff] [blame] | 959 | bsc->cfg->nr, con_bsc->cfg->nr); |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 960 | goto exit2; |
| 961 | } |
| 962 | |
Holger Hans Peter Freyther | 09ecda4 | 2010-09-15 17:39:44 +0800 | [diff] [blame] | 963 | /* do not forward messages to the MSC */ |
| 964 | if (con_filter) |
| 965 | goto exit2; |
| 966 | |
Holger Hans Peter Freyther | db65bbd | 2010-07-05 13:58:40 +0800 | [diff] [blame] | 967 | if (!con_msc) { |
Holger Hans Peter Freyther | 27640fc | 2010-09-15 00:14:48 +0800 | [diff] [blame] | 968 | LOGP(DNAT, LOGL_ERROR, "Not forwarding data bsc_nr: %d ipa: %d type: 0x%x\n", |
| 969 | bsc->cfg->nr, |
| 970 | parsed ? parsed->ipa_proto : -1, |
| 971 | parsed ? parsed->sccp_type : -1); |
Holger Hans Peter Freyther | db65bbd | 2010-07-05 13:58:40 +0800 | [diff] [blame] | 972 | goto exit2; |
| 973 | } |
| 974 | |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 975 | /* send the non-filtered but maybe modified msg */ |
Holger Hans Peter Freyther | db65bbd | 2010-07-05 13:58:40 +0800 | [diff] [blame] | 976 | queue_for_msc(con_msc, msg); |
Holger Hans Peter Freyther | a914daf | 2010-10-21 12:12:57 +0200 | [diff] [blame] | 977 | if (parsed) |
| 978 | talloc_free(parsed); |
Holger Hans Peter Freyther | 6f5fbfd | 2010-06-15 18:47:02 +0800 | [diff] [blame] | 979 | return 0; |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 980 | |
| 981 | exit: |
Holger Hans Peter Freyther | 38a77d0 | 2010-01-30 12:45:10 +0100 | [diff] [blame] | 982 | /* if we filter out the reset send an ack to the BSC */ |
| 983 | if (parsed->bssap == 0 && parsed->gsm_type == BSS_MAP_MSG_RESET) { |
Holger Hans Peter Freyther | 747d654 | 2010-03-26 07:24:34 +0100 | [diff] [blame] | 984 | send_reset_ack(bsc); |
| 985 | send_reset_ack(bsc); |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 986 | } else if (parsed->ipa_proto == IPAC_PROTO_IPACCESS) { |
| 987 | /* do we know who is handling this? */ |
| 988 | if (msg->l2h[0] == IPAC_MSGT_ID_RESP) { |
| 989 | struct tlv_parsed tvp; |
| 990 | ipaccess_idtag_parse(&tvp, |
| 991 | (unsigned char *) msg->l2h + 2, |
| 992 | msgb_l2len(msg) - 2); |
| 993 | if (TLVP_PRESENT(&tvp, IPAC_IDTAG_UNITNAME)) |
| 994 | ipaccess_auth_bsc(&tvp, bsc); |
| 995 | } |
| 996 | |
| 997 | goto exit2; |
Holger Hans Peter Freyther | 38a77d0 | 2010-01-30 12:45:10 +0100 | [diff] [blame] | 998 | } |
| 999 | |
Holger Hans Peter Freyther | 1498d2e | 2010-05-15 00:29:50 +0800 | [diff] [blame] | 1000 | exit2: |
Holger Hans Peter Freyther | 749497e | 2010-09-29 01:19:42 +0800 | [diff] [blame] | 1001 | if (imsi) |
| 1002 | talloc_free(imsi); |
Holger Hans Peter Freyther | 1498d2e | 2010-05-15 00:29:50 +0800 | [diff] [blame] | 1003 | talloc_free(parsed); |
| 1004 | msgb_free(msg); |
| 1005 | return -1; |
| 1006 | |
Holger Hans Peter Freyther | b4af5c9 | 2010-05-14 03:39:56 +0800 | [diff] [blame] | 1007 | exit3: |
| 1008 | /* send a SCCP Connection Refused */ |
Holger Hans Peter Freyther | 749497e | 2010-09-29 01:19:42 +0800 | [diff] [blame] | 1009 | if (imsi) |
| 1010 | talloc_free(imsi); |
Holger Hans Peter Freyther | 91246d7 | 2010-05-16 02:20:26 +0800 | [diff] [blame] | 1011 | bsc_send_con_refuse(bsc, parsed, con_type); |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 1012 | talloc_free(parsed); |
Holger Hans Peter Freyther | 6f5fbfd | 2010-06-15 18:47:02 +0800 | [diff] [blame] | 1013 | msgb_free(msg); |
| 1014 | return -1; |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 1015 | } |
| 1016 | |
Holger Hans Peter Freyther | ed07a3f | 2010-06-15 18:47:10 +0800 | [diff] [blame] | 1017 | static int ipaccess_bsc_read_cb(struct bsc_fd *bfd) |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 1018 | { |
| 1019 | int error; |
Holger Hans Peter Freyther | 747d654 | 2010-03-26 07:24:34 +0100 | [diff] [blame] | 1020 | struct bsc_connection *bsc = bfd->data; |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 1021 | struct msgb *msg = ipaccess_read_msg(bfd, &error); |
Holger Hans Peter Freyther | 5078871 | 2010-06-15 18:51:33 +0800 | [diff] [blame] | 1022 | struct ipaccess_head *hh; |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 1023 | |
| 1024 | if (!msg) { |
Holger Hans Peter Freyther | 9db7843 | 2010-04-23 00:23:03 +0800 | [diff] [blame] | 1025 | if (error == 0) |
Holger Hans Peter Freyther | 19c3544 | 2010-05-01 10:37:15 +0800 | [diff] [blame] | 1026 | LOGP(DNAT, LOGL_ERROR, |
| 1027 | "The connection to the BSC Nr: %d was lost. Cleaning it\n", |
| 1028 | bsc->cfg ? bsc->cfg->nr : -1); |
Holger Hans Peter Freyther | 9db7843 | 2010-04-23 00:23:03 +0800 | [diff] [blame] | 1029 | else |
Holger Hans Peter Freyther | 19c3544 | 2010-05-01 10:37:15 +0800 | [diff] [blame] | 1030 | LOGP(DNAT, LOGL_ERROR, |
| 1031 | "Stream error on BSC Nr: %d. Failed to parse ip access message: %d\n", |
| 1032 | bsc->cfg ? bsc->cfg->nr : -1, error); |
Holger Hans Peter Freyther | 9db7843 | 2010-04-23 00:23:03 +0800 | [diff] [blame] | 1033 | |
Holger Hans Peter Freyther | 2f9dcf0 | 2010-04-27 13:21:39 +0800 | [diff] [blame] | 1034 | bsc_close_connection(bsc); |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 1035 | return -1; |
| 1036 | } |
| 1037 | |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 1038 | |
Holger Hans Peter Freyther | 418f394 | 2010-01-29 05:58:43 +0100 | [diff] [blame] | 1039 | LOGP(DNAT, LOGL_DEBUG, "MSG from BSC: %s proto: %d\n", hexdump(msg->data, msg->len), msg->l2h[0]); |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 1040 | |
| 1041 | /* Handle messages from the BSC */ |
Holger Hans Peter Freyther | 5078871 | 2010-06-15 18:51:33 +0800 | [diff] [blame] | 1042 | hh = (struct ipaccess_head *) msg->data; |
Holger Hans Peter Freyther | 906c15e | 2010-05-02 19:28:59 +0800 | [diff] [blame] | 1043 | |
Holger Hans Peter Freyther | 5078871 | 2010-06-15 18:51:33 +0800 | [diff] [blame] | 1044 | /* stop the pong timeout */ |
| 1045 | if (hh->proto == IPAC_PROTO_IPACCESS) { |
| 1046 | if (msg->l2h[0] == IPAC_MSGT_PONG) { |
Holger Hans Peter Freyther | 906c15e | 2010-05-02 19:28:59 +0800 | [diff] [blame] | 1047 | bsc_del_timer(&bsc->pong_timeout); |
| 1048 | msgb_free(msg); |
| 1049 | return 0; |
Holger Hans Peter Freyther | 5078871 | 2010-06-15 18:51:33 +0800 | [diff] [blame] | 1050 | } else if (msg->l2h[0] == IPAC_MSGT_PING) { |
| 1051 | send_pong(bsc); |
| 1052 | msgb_free(msg); |
| 1053 | return 0; |
Holger Hans Peter Freyther | 906c15e | 2010-05-02 19:28:59 +0800 | [diff] [blame] | 1054 | } |
| 1055 | } |
| 1056 | |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 1057 | /* FIXME: Currently no PONG is sent to the BSC */ |
| 1058 | /* FIXME: Currently no ID ACK is sent to the BSC */ |
Holger Hans Peter Freyther | 747d654 | 2010-03-26 07:24:34 +0100 | [diff] [blame] | 1059 | forward_sccp_to_msc(bsc, msg); |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 1060 | |
| 1061 | return 0; |
| 1062 | } |
| 1063 | |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 1064 | static int ipaccess_listen_bsc_cb(struct bsc_fd *bfd, unsigned int what) |
| 1065 | { |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 1066 | struct bsc_connection *bsc; |
Holger Hans Peter Freyther | 872d768 | 2010-05-05 20:33:34 +0800 | [diff] [blame] | 1067 | int fd, rc, on; |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 1068 | struct sockaddr_in sa; |
| 1069 | socklen_t sa_len = sizeof(sa); |
| 1070 | |
| 1071 | if (!(what & BSC_FD_READ)) |
| 1072 | return 0; |
| 1073 | |
Holger Hans Peter Freyther | 872d768 | 2010-05-05 20:33:34 +0800 | [diff] [blame] | 1074 | fd = accept(bfd->fd, (struct sockaddr *) &sa, &sa_len); |
| 1075 | if (fd < 0) { |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 1076 | perror("accept"); |
Holger Hans Peter Freyther | 872d768 | 2010-05-05 20:33:34 +0800 | [diff] [blame] | 1077 | return fd; |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 1078 | } |
| 1079 | |
Holger Hans Peter Freyther | d470286 | 2010-04-12 12:17:09 +0200 | [diff] [blame] | 1080 | /* count the reconnect */ |
| 1081 | counter_inc(nat->stats.bsc.reconn); |
| 1082 | |
Holger Hans Peter Freyther | cd89537 | 2010-03-29 08:04:09 +0200 | [diff] [blame] | 1083 | /* |
| 1084 | * if we are not connected to a msc... just close the socket |
| 1085 | */ |
Holger Hans Peter Freyther | 20ee312 | 2010-07-05 14:39:44 +0800 | [diff] [blame] | 1086 | if (!bsc_nat_msc_is_connected(nat)) { |
Holger Hans Peter Freyther | cd89537 | 2010-03-29 08:04:09 +0200 | [diff] [blame] | 1087 | LOGP(DNAT, LOGL_NOTICE, "Disconnecting BSC due lack of MSC connection.\n"); |
Holger Hans Peter Freyther | 872d768 | 2010-05-05 20:33:34 +0800 | [diff] [blame] | 1088 | close(fd); |
Holger Hans Peter Freyther | cd89537 | 2010-03-29 08:04:09 +0200 | [diff] [blame] | 1089 | return 0; |
| 1090 | } |
| 1091 | |
Holger Hans Peter Freyther | 9e938c6 | 2010-05-05 18:58:13 +0800 | [diff] [blame] | 1092 | on = 1; |
Holger Hans Peter Freyther | 569ee12 | 2010-05-05 20:42:14 +0800 | [diff] [blame] | 1093 | rc = setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)); |
Holger Hans Peter Freyther | 872d768 | 2010-05-05 20:33:34 +0800 | [diff] [blame] | 1094 | if (rc != 0) |
Holger Hans Peter Freyther | 9e938c6 | 2010-05-05 18:58:13 +0800 | [diff] [blame] | 1095 | LOGP(DNAT, LOGL_ERROR, "Failed to set TCP_NODELAY: %s\n", strerror(errno)); |
| 1096 | |
Holger Hans Peter Freyther | 078321a | 2010-05-31 10:36:35 +0800 | [diff] [blame] | 1097 | rc = setsockopt(fd, IPPROTO_IP, IP_TOS, |
Holger Hans Peter Freyther | 6b77107 | 2010-07-27 19:21:53 +0800 | [diff] [blame] | 1098 | &nat->bsc_ip_dscp, sizeof(nat->bsc_ip_dscp)); |
Holger Hans Peter Freyther | 078321a | 2010-05-31 10:36:35 +0800 | [diff] [blame] | 1099 | if (rc != 0) |
| 1100 | LOGP(DNAT, LOGL_ERROR, "Failed to set IP_TOS: %s\n", strerror(errno)); |
| 1101 | |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 1102 | /* todo... do something with the connection */ |
Holger Hans Peter Freyther | da86c0a | 2010-01-12 21:35:32 +0100 | [diff] [blame] | 1103 | /* todo... use GNUtls to see if we want to trust this as a BTS */ |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 1104 | |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 1105 | /* |
| 1106 | * |
| 1107 | */ |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 1108 | bsc = bsc_connection_alloc(nat); |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 1109 | if (!bsc) { |
Holger Hans Peter Freyther | 418f394 | 2010-01-29 05:58:43 +0100 | [diff] [blame] | 1110 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate BSC struct.\n"); |
Holger Hans Peter Freyther | 872d768 | 2010-05-05 20:33:34 +0800 | [diff] [blame] | 1111 | close(fd); |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 1112 | return -1; |
| 1113 | } |
| 1114 | |
Holger Hans Peter Freyther | ed07a3f | 2010-06-15 18:47:10 +0800 | [diff] [blame] | 1115 | bsc->write_queue.bfd.data = bsc; |
Holger Hans Peter Freyther | 872d768 | 2010-05-05 20:33:34 +0800 | [diff] [blame] | 1116 | bsc->write_queue.bfd.fd = fd; |
Holger Hans Peter Freyther | ed07a3f | 2010-06-15 18:47:10 +0800 | [diff] [blame] | 1117 | bsc->write_queue.read_cb = ipaccess_bsc_read_cb; |
Holger Hans Peter Freyther | 69cfa17 | 2010-10-13 20:37:13 +0200 | [diff] [blame] | 1118 | bsc->write_queue.write_cb = bsc_write_cb; |
Holger Hans Peter Freyther | ed07a3f | 2010-06-15 18:47:10 +0800 | [diff] [blame] | 1119 | bsc->write_queue.bfd.when = BSC_FD_READ; |
| 1120 | if (bsc_register_fd(&bsc->write_queue.bfd) < 0) { |
Holger Hans Peter Freyther | 418f394 | 2010-01-29 05:58:43 +0100 | [diff] [blame] | 1121 | LOGP(DNAT, LOGL_ERROR, "Failed to register BSC fd.\n"); |
Holger Hans Peter Freyther | 872d768 | 2010-05-05 20:33:34 +0800 | [diff] [blame] | 1122 | close(fd); |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 1123 | talloc_free(bsc); |
| 1124 | return -2; |
| 1125 | } |
| 1126 | |
Holger Hans Peter Freyther | 74cfab7 | 2010-05-05 17:03:44 +0800 | [diff] [blame] | 1127 | LOGP(DNAT, LOGL_NOTICE, "BSC connection on %d with IP: %s\n", |
Holger Hans Peter Freyther | 872d768 | 2010-05-05 20:33:34 +0800 | [diff] [blame] | 1128 | fd, inet_ntoa(sa.sin_addr)); |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 1129 | llist_add(&bsc->list_entry, &nat->bsc_connections); |
Holger Hans Peter Freyther | db7ba7d | 2010-03-26 07:41:54 +0100 | [diff] [blame] | 1130 | send_id_ack(bsc); |
| 1131 | send_id_req(bsc); |
Holger Hans Peter Freyther | d131b79 | 2010-03-31 07:30:58 +0200 | [diff] [blame] | 1132 | send_mgcp_reset(bsc); |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 1133 | |
| 1134 | /* |
| 1135 | * start the hangup timer |
| 1136 | */ |
| 1137 | bsc->id_timeout.data = bsc; |
| 1138 | bsc->id_timeout.cb = ipaccess_close_bsc; |
Holger Hans Peter Freyther | da35a8d | 2010-05-05 16:57:38 +0800 | [diff] [blame] | 1139 | bsc_schedule_timer(&bsc->id_timeout, nat->auth_timeout, 0); |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 1140 | return 0; |
| 1141 | } |
| 1142 | |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 1143 | static void print_usage() |
| 1144 | { |
| 1145 | printf("Usage: bsc_nat\n"); |
| 1146 | } |
| 1147 | |
| 1148 | static void print_help() |
| 1149 | { |
| 1150 | printf(" Some useful help...\n"); |
| 1151 | printf(" -h --help this text\n"); |
| 1152 | printf(" -d option --debug=DRLL:DCC:DMM:DRR:DRSL:DNM enable debugging\n"); |
Harald Welte | 2c869ef | 2010-08-25 19:43:54 +0200 | [diff] [blame] | 1153 | printf(" -D --daemonize Fork the process into a background daemon\n"); |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 1154 | printf(" -s --disable-color\n"); |
| 1155 | printf(" -c --config-file filename The config file to use.\n"); |
| 1156 | printf(" -m --msc=IP. The address of the MSC.\n"); |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 1157 | printf(" -l --local=IP. The local address of this BSC.\n"); |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 1158 | } |
| 1159 | |
Holger Hans Peter Freyther | adb6e1c | 2010-09-18 06:44:24 +0800 | [diff] [blame] | 1160 | static void handle_options(int argc, char **argv) |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 1161 | { |
| 1162 | while (1) { |
| 1163 | int option_index = 0, c; |
| 1164 | static struct option long_options[] = { |
| 1165 | {"help", 0, 0, 'h'}, |
| 1166 | {"debug", 1, 0, 'd'}, |
| 1167 | {"config-file", 1, 0, 'c'}, |
| 1168 | {"disable-color", 0, 0, 's'}, |
| 1169 | {"timestamp", 0, 0, 'T'}, |
| 1170 | {"msc", 1, 0, 'm'}, |
| 1171 | {"local", 1, 0, 'l'}, |
| 1172 | {0, 0, 0, 0} |
| 1173 | }; |
| 1174 | |
| 1175 | c = getopt_long(argc, argv, "hd:sTPc:m:l:", |
| 1176 | long_options, &option_index); |
| 1177 | if (c == -1) |
| 1178 | break; |
| 1179 | |
| 1180 | switch (c) { |
| 1181 | case 'h': |
| 1182 | print_usage(); |
| 1183 | print_help(); |
| 1184 | exit(0); |
| 1185 | case 's': |
Holger Hans Peter Freyther | fb7a934 | 2010-06-15 19:14:12 +0800 | [diff] [blame] | 1186 | log_set_use_color(stderr_target, 0); |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 1187 | break; |
| 1188 | case 'd': |
Holger Hans Peter Freyther | fb7a934 | 2010-06-15 19:14:12 +0800 | [diff] [blame] | 1189 | log_parse_category_mask(stderr_target, optarg); |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 1190 | break; |
| 1191 | case 'c': |
| 1192 | config_file = strdup(optarg); |
| 1193 | break; |
| 1194 | case 'T': |
Holger Hans Peter Freyther | fb7a934 | 2010-06-15 19:14:12 +0800 | [diff] [blame] | 1195 | log_set_print_timestamp(stderr_target, 1); |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 1196 | break; |
| 1197 | case 'm': |
Holger Hans Peter Freyther | a88742c | 2010-06-15 18:51:04 +0800 | [diff] [blame] | 1198 | msc_ip = optarg; |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 1199 | break; |
| 1200 | case 'l': |
| 1201 | inet_aton(optarg, &local_addr); |
| 1202 | break; |
| 1203 | default: |
| 1204 | /* ignore */ |
| 1205 | break; |
| 1206 | } |
| 1207 | } |
| 1208 | } |
| 1209 | |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 1210 | static void signal_handler(int signal) |
| 1211 | { |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 1212 | switch (signal) { |
| 1213 | case SIGABRT: |
| 1214 | /* in case of abort, we want to obtain a talloc report |
| 1215 | * and then return to the caller, who will abort the process */ |
| 1216 | case SIGUSR1: |
| 1217 | talloc_report_full(tall_bsc_ctx, stderr); |
| 1218 | break; |
| 1219 | default: |
| 1220 | break; |
| 1221 | } |
| 1222 | } |
| 1223 | |
Holger Hans Peter Freyther | 6b6ecba | 2010-06-15 18:51:56 +0800 | [diff] [blame] | 1224 | static void sccp_close_unconfirmed(void *_data) |
| 1225 | { |
| 1226 | struct sccp_connections *conn, *tmp1; |
| 1227 | struct timespec now; |
| 1228 | clock_gettime(CLOCK_MONOTONIC, &now); |
| 1229 | |
| 1230 | llist_for_each_entry_safe(conn, tmp1, &nat->sccp_connections, list_entry) { |
| 1231 | if (conn->has_remote_ref) |
| 1232 | continue; |
| 1233 | |
| 1234 | int diff = (now.tv_sec - conn->creation_time.tv_sec) / 60; |
| 1235 | if (diff < SCCP_CLOSE_TIME_TIMEOUT) |
| 1236 | continue; |
| 1237 | |
| 1238 | LOGP(DNAT, LOGL_ERROR, "SCCP connection 0x%x/0x%x was never confirmed.\n", |
| 1239 | sccp_src_ref_to_int(&conn->real_ref), |
| 1240 | sccp_src_ref_to_int(&conn->patched_ref)); |
| 1241 | sccp_connection_destroy(conn); |
| 1242 | } |
| 1243 | |
| 1244 | bsc_schedule_timer(&sccp_close, SCCP_CLOSE_TIME, 0); |
| 1245 | } |
| 1246 | |
Holger Hans Peter Freyther | 0b0b31c | 2010-06-15 18:51:25 +0800 | [diff] [blame] | 1247 | extern void *tall_msgb_ctx; |
| 1248 | extern void *tall_ctr_ctx; |
| 1249 | static void talloc_init_ctx() |
| 1250 | { |
| 1251 | tall_bsc_ctx = talloc_named_const(NULL, 0, "nat"); |
| 1252 | tall_msgb_ctx = talloc_named_const(tall_bsc_ctx, 0, "msgb"); |
| 1253 | tall_ctr_ctx = talloc_named_const(tall_bsc_ctx, 0, "counter"); |
| 1254 | } |
| 1255 | |
Holger Hans Peter Freyther | 1398f13 | 2010-06-15 20:14:08 +0800 | [diff] [blame] | 1256 | extern enum node_type bsc_vty_go_parent(struct vty *vty); |
| 1257 | |
| 1258 | static struct vty_app_info vty_info = { |
Harald Welte | ec1921d | 2011-02-24 23:57:06 +0100 | [diff] [blame] | 1259 | .name = "OsmoBSCNAT", |
Holger Hans Peter Freyther | 1398f13 | 2010-06-15 20:14:08 +0800 | [diff] [blame] | 1260 | .version = PACKAGE_VERSION, |
| 1261 | .go_parent_cb = bsc_vty_go_parent, |
Holger Hans Peter Freyther | 81506b4 | 2010-09-04 11:00:01 +0800 | [diff] [blame] | 1262 | .is_config_node = bsc_vty_is_config_node, |
Holger Hans Peter Freyther | 1398f13 | 2010-06-15 20:14:08 +0800 | [diff] [blame] | 1263 | }; |
| 1264 | |
Holger Hans Peter Freyther | adb6e1c | 2010-09-18 06:44:24 +0800 | [diff] [blame] | 1265 | int main(int argc, char **argv) |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 1266 | { |
Harald Welte | 2c869ef | 2010-08-25 19:43:54 +0200 | [diff] [blame] | 1267 | int rc; |
Holger Hans Peter Freyther | 0b0b31c | 2010-06-15 18:51:25 +0800 | [diff] [blame] | 1268 | |
Harald Welte | 2c869ef | 2010-08-25 19:43:54 +0200 | [diff] [blame] | 1269 | talloc_init_ctx(); |
Holger Hans Peter Freyther | a1597f1 | 2010-06-15 18:51:18 +0800 | [diff] [blame] | 1270 | |
Holger Hans Peter Freyther | fb7a934 | 2010-06-15 19:14:12 +0800 | [diff] [blame] | 1271 | log_init(&log_info); |
| 1272 | stderr_target = log_target_create_stderr(); |
| 1273 | log_add_target(stderr_target); |
| 1274 | log_set_all_filter(stderr_target, 1); |
Holger Hans Peter Freyther | 6c45f2e | 2010-06-15 19:06:18 +0800 | [diff] [blame] | 1275 | |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 1276 | nat = bsc_nat_alloc(); |
| 1277 | if (!nat) { |
| 1278 | fprintf(stderr, "Failed to allocate the BSC nat.\n"); |
| 1279 | return -4; |
| 1280 | } |
| 1281 | |
Holger Hans Peter Freyther | d5e6c23 | 2010-08-05 10:08:36 +0000 | [diff] [blame] | 1282 | nat->mgcp_cfg = mgcp_config_alloc(); |
Holger Hans Peter Freyther | a88742c | 2010-06-15 18:51:04 +0800 | [diff] [blame] | 1283 | if (!nat->mgcp_cfg) { |
| 1284 | fprintf(stderr, "Failed to allocate MGCP cfg.\n"); |
| 1285 | return -5; |
| 1286 | } |
| 1287 | |
Holger Hans Peter Freyther | 1398f13 | 2010-06-15 20:14:08 +0800 | [diff] [blame] | 1288 | vty_info.copyright = openbsc_copyright; |
| 1289 | vty_init(&vty_info); |
Pablo Neira Ayuso | 739a566 | 2011-03-09 13:36:32 +0100 | [diff] [blame] | 1290 | logging_vty_add_cmds(&log_info); |
Holger Hans Peter Freyther | 1398f13 | 2010-06-15 20:14:08 +0800 | [diff] [blame] | 1291 | bsc_nat_vty_init(nat); |
| 1292 | |
| 1293 | |
Holger Hans Peter Freyther | a88742c | 2010-06-15 18:51:04 +0800 | [diff] [blame] | 1294 | /* parse options */ |
| 1295 | local_addr.s_addr = INADDR_ANY; |
| 1296 | handle_options(argc, argv); |
Holger Hans Peter Freyther | f7d3335 | 2010-06-15 18:50:26 +0800 | [diff] [blame] | 1297 | |
Holger Hans Peter Freyther | b2c38eb | 2010-06-17 18:16:00 +0800 | [diff] [blame] | 1298 | rate_ctr_init(tall_bsc_ctx); |
| 1299 | |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 1300 | /* init vty and parse */ |
Holger Hans Peter Freyther | 1398f13 | 2010-06-15 20:14:08 +0800 | [diff] [blame] | 1301 | telnet_init(tall_bsc_ctx, NULL, 4244); |
Holger Hans Peter Freyther | f7d3335 | 2010-06-15 18:50:26 +0800 | [diff] [blame] | 1302 | if (mgcp_parse_config(config_file, nat->mgcp_cfg) < 0) { |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 1303 | fprintf(stderr, "Failed to parse the config file: '%s'\n", config_file); |
| 1304 | return -3; |
| 1305 | } |
| 1306 | |
Holger Hans Peter Freyther | a88742c | 2010-06-15 18:51:04 +0800 | [diff] [blame] | 1307 | /* over rule the VTY config */ |
| 1308 | if (msc_ip) |
| 1309 | bsc_nat_set_msc_ip(nat, msc_ip); |
| 1310 | |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 1311 | /* seed the PRNG */ |
| 1312 | srand(time(NULL)); |
| 1313 | |
Holger Hans Peter Freyther | a7f8018 | 2010-03-31 13:02:22 +0200 | [diff] [blame] | 1314 | /* |
| 1315 | * Setup the MGCP code.. |
| 1316 | */ |
Holger Hans Peter Freyther | 7b7eef6 | 2010-04-22 12:08:17 +0800 | [diff] [blame] | 1317 | if (bsc_mgcp_nat_init(nat) != 0) |
Holger Hans Peter Freyther | a7f8018 | 2010-03-31 13:02:22 +0200 | [diff] [blame] | 1318 | return -4; |
| 1319 | |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 1320 | /* connect to the MSC */ |
Holger Hans Peter Freyther | ca999a9 | 2010-06-15 18:52:38 +0800 | [diff] [blame] | 1321 | nat->msc_con = bsc_msc_create(nat->msc_ip, nat->msc_port, 0); |
Holger Hans Peter Freyther | aad82ce | 2010-05-11 19:07:39 +0800 | [diff] [blame] | 1322 | if (!nat->msc_con) { |
Holger Hans Peter Freyther | baf2abe | 2010-06-15 18:47:29 +0800 | [diff] [blame] | 1323 | fprintf(stderr, "Creating a bsc_msc_connection failed.\n"); |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 1324 | exit(1); |
| 1325 | } |
| 1326 | |
Holger Hans Peter Freyther | aad82ce | 2010-05-11 19:07:39 +0800 | [diff] [blame] | 1327 | nat->msc_con->connection_loss = msc_connection_was_lost; |
Holger Hans Peter Freyther | a99c5b9 | 2010-08-04 02:31:55 +0800 | [diff] [blame] | 1328 | nat->msc_con->connected = msc_connection_connected; |
Holger Hans Peter Freyther | aad82ce | 2010-05-11 19:07:39 +0800 | [diff] [blame] | 1329 | nat->msc_con->write_queue.read_cb = ipaccess_msc_read_cb; |
| 1330 | nat->msc_con->write_queue.write_cb = ipaccess_msc_write_cb;; |
Holger Hans Peter Freyther | bec411b | 2010-07-05 14:14:18 +0800 | [diff] [blame] | 1331 | nat->msc_con->write_queue.bfd.data = nat->msc_con; |
Holger Hans Peter Freyther | aad82ce | 2010-05-11 19:07:39 +0800 | [diff] [blame] | 1332 | bsc_msc_connect(nat->msc_con); |
Holger Hans Peter Freyther | baf2abe | 2010-06-15 18:47:29 +0800 | [diff] [blame] | 1333 | |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 1334 | /* wait for the BSC */ |
Holger Hans Peter Freyther | a25d579 | 2010-10-19 17:48:13 +0200 | [diff] [blame] | 1335 | rc = make_sock(&bsc_listen, IPPROTO_TCP, ntohl(local_addr.s_addr), |
Holger Hans Peter Freyther | f961de1 | 2010-10-12 23:28:28 +0200 | [diff] [blame] | 1336 | 5000, ipaccess_listen_bsc_cb); |
| 1337 | if (rc != 0) { |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 1338 | fprintf(stderr, "Failed to listen for BSC.\n"); |
| 1339 | exit(1); |
| 1340 | } |
| 1341 | |
Holger Hans Peter Freyther | c16c2dc | 2010-10-13 20:22:36 +0200 | [diff] [blame] | 1342 | rc = bsc_ussd_init(nat); |
| 1343 | if (rc != 0) { |
| 1344 | LOGP(DNAT, LOGL_ERROR, "Failed to bind the USSD socket.\n"); |
| 1345 | exit(1); |
| 1346 | } |
| 1347 | |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 1348 | signal(SIGABRT, &signal_handler); |
| 1349 | signal(SIGUSR1, &signal_handler); |
| 1350 | signal(SIGPIPE, SIG_IGN); |
| 1351 | |
Harald Welte | 2c869ef | 2010-08-25 19:43:54 +0200 | [diff] [blame] | 1352 | if (daemonize) { |
| 1353 | rc = osmo_daemonize(); |
| 1354 | if (rc < 0) { |
| 1355 | perror("Error during daemonize"); |
| 1356 | exit(1); |
| 1357 | } |
| 1358 | } |
| 1359 | |
Holger Hans Peter Freyther | 6b6ecba | 2010-06-15 18:51:56 +0800 | [diff] [blame] | 1360 | /* recycle timer */ |
Holger Hans Peter Freyther | 30e1ae9 | 2010-07-30 02:53:14 +0800 | [diff] [blame] | 1361 | sccp_set_log_area(DSCCP); |
Holger Hans Peter Freyther | 6b6ecba | 2010-06-15 18:51:56 +0800 | [diff] [blame] | 1362 | sccp_close.cb = sccp_close_unconfirmed; |
| 1363 | sccp_close.data = NULL; |
| 1364 | bsc_schedule_timer(&sccp_close, SCCP_CLOSE_TIME, 0); |
| 1365 | |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 1366 | while (1) { |
| 1367 | bsc_select_main(0); |
| 1368 | } |
| 1369 | |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 1370 | return 0; |
| 1371 | } |
Holger Hans Peter Freyther | 54f5352 | 2010-10-27 11:01:55 +0200 | [diff] [blame] | 1372 | |
| 1373 | /* Close all connections handed out to the USSD module */ |
| 1374 | int bsc_close_ussd_connections(struct bsc_nat *nat) |
| 1375 | { |
| 1376 | struct sccp_connections *con; |
| 1377 | llist_for_each_entry(con, &nat->sccp_connections, list_entry) { |
| 1378 | if (con->con_local != 2) |
| 1379 | continue; |
| 1380 | if (!con->bsc) |
| 1381 | continue; |
| 1382 | |
Holger Hans Peter Freyther | a8a50a8 | 2010-10-27 11:58:04 +0200 | [diff] [blame] | 1383 | nat_send_clrc_bsc(con); |
Holger Hans Peter Freyther | 54f5352 | 2010-10-27 11:01:55 +0200 | [diff] [blame] | 1384 | nat_send_rlsd_bsc(con); |
| 1385 | } |
| 1386 | |
| 1387 | return 0; |
| 1388 | } |