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 |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 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 |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 21 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 22 | * |
| 23 | */ |
| 24 | #include <sys/socket.h> |
| 25 | #include <netinet/in.h> |
| 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 | 38a77d0 | 2010-01-30 12:45:10 +0100 | [diff] [blame] | 41 | #include <openbsc/bssap.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 | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 44 | #include <openbsc/telnet_interface.h> |
| 45 | |
Holger Hans Peter Freyther | 6c45f2e | 2010-06-15 19:06:18 +0800 | [diff] [blame] | 46 | #include <osmocore/talloc.h> |
| 47 | |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 48 | #include <vty/vty.h> |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 49 | |
Holger Hans Peter Freyther | 6a97b8d | 2010-06-15 18:45:26 +0800 | [diff] [blame] | 50 | #include <sccp/sccp.h> |
| 51 | |
Holger Hans Peter Freyther | fb7a934 | 2010-06-15 19:14:12 +0800 | [diff] [blame] | 52 | struct log_target *stderr_target; |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 53 | static const char *config_file = "bsc-nat.cfg"; |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 54 | static struct in_addr local_addr; |
Holger Hans Peter Freyther | baf2abe | 2010-06-15 18:47:29 +0800 | [diff] [blame] | 55 | static struct bsc_msc_connection *msc_con; |
Holger Hans Peter Freyther | 2d677c6 | 2010-03-26 06:51:04 +0100 | [diff] [blame] | 56 | static struct bsc_fd bsc_listen; |
Holger Hans Peter Freyther | a88742c | 2010-06-15 18:51:04 +0800 | [diff] [blame] | 57 | static const char *msc_ip = NULL; |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 58 | |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 59 | |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 60 | static struct bsc_nat *nat; |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 61 | static void bsc_send_data(struct bsc_connection *bsc, const u_int8_t *data, unsigned int length, int); |
Holger Hans Peter Freyther | cd89537 | 2010-03-29 08:04:09 +0200 | [diff] [blame] | 62 | static void remove_bsc_connection(struct bsc_connection *connection); |
Holger Hans Peter Freyther | b752761 | 2010-04-07 11:20:36 +0200 | [diff] [blame] | 63 | static void msc_send_reset(struct bsc_msc_connection *con); |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 64 | |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 65 | struct bsc_config *bsc_config_num(struct bsc_nat *nat, int num) |
| 66 | { |
| 67 | struct bsc_config *conf; |
| 68 | |
| 69 | llist_for_each_entry(conf, &nat->bsc_configs, entry) |
| 70 | if (conf->nr == num) |
| 71 | return conf; |
| 72 | |
| 73 | return NULL; |
| 74 | } |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 75 | |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 76 | /* |
| 77 | * below are stubs we need to link |
| 78 | */ |
| 79 | int nm_state_event(enum nm_evt evt, u_int8_t obj_class, void *obj, |
| 80 | struct gsm_nm_state *old_state, struct gsm_nm_state *new_state) |
| 81 | { |
| 82 | return -1; |
| 83 | } |
| 84 | |
| 85 | void input_event(int event, enum e1inp_sign_type type, struct gsm_bts_trx *trx) |
| 86 | {} |
| 87 | |
| 88 | int gsm0408_rcvmsg(struct msgb *msg, u_int8_t link_id) |
| 89 | { |
| 90 | return -1; |
| 91 | } |
| 92 | |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 93 | static void send_reset_ack(struct bsc_connection *bsc) |
Holger Hans Peter Freyther | 38a77d0 | 2010-01-30 12:45:10 +0100 | [diff] [blame] | 94 | { |
| 95 | static const u_int8_t gsm_reset_ack[] = { |
Holger Hans Peter Freyther | 38a77d0 | 2010-01-30 12:45:10 +0100 | [diff] [blame] | 96 | 0x09, 0x00, 0x03, 0x07, 0x0b, 0x04, 0x43, 0x01, |
| 97 | 0x00, 0xfe, 0x04, 0x43, 0x5c, 0x00, 0xfe, 0x03, |
| 98 | 0x00, 0x01, 0x31, |
| 99 | }; |
| 100 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 101 | 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] | 102 | } |
| 103 | |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 104 | static void send_id_ack(struct bsc_connection *bsc) |
Holger Hans Peter Freyther | db7ba7d | 2010-03-26 07:41:54 +0100 | [diff] [blame] | 105 | { |
| 106 | static const u_int8_t id_ack[] = { |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 107 | IPAC_MSGT_ID_ACK |
Holger Hans Peter Freyther | db7ba7d | 2010-03-26 07:41:54 +0100 | [diff] [blame] | 108 | }; |
| 109 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 110 | 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] | 111 | } |
| 112 | |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 113 | static void send_id_req(struct bsc_connection *bsc) |
Holger Hans Peter Freyther | db7ba7d | 2010-03-26 07:41:54 +0100 | [diff] [blame] | 114 | { |
| 115 | static const u_int8_t id_req[] = { |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 116 | IPAC_MSGT_ID_GET, |
Holger Hans Peter Freyther | db7ba7d | 2010-03-26 07:41:54 +0100 | [diff] [blame] | 117 | 0x01, IPAC_IDTAG_UNIT, |
| 118 | 0x01, IPAC_IDTAG_MACADDR, |
| 119 | 0x01, IPAC_IDTAG_LOCATION1, |
| 120 | 0x01, IPAC_IDTAG_LOCATION2, |
| 121 | 0x01, IPAC_IDTAG_EQUIPVERS, |
| 122 | 0x01, IPAC_IDTAG_SWVERSION, |
| 123 | 0x01, IPAC_IDTAG_UNITNAME, |
| 124 | 0x01, IPAC_IDTAG_SERNR, |
| 125 | }; |
| 126 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 127 | 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] | 128 | } |
| 129 | |
Holger Hans Peter Freyther | 6b087d1 | 2010-04-06 17:32:58 +0200 | [diff] [blame] | 130 | static void nat_send_rlsd(struct sccp_connections *conn) |
| 131 | { |
| 132 | struct sccp_connection_released *rel; |
| 133 | struct msgb *msg; |
| 134 | |
| 135 | msg = msgb_alloc_headroom(4096, 128, "rlsd"); |
| 136 | if (!msg) { |
| 137 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate clear command.\n"); |
| 138 | return; |
| 139 | } |
| 140 | |
| 141 | msg->l2h = msgb_put(msg, sizeof(*rel)); |
| 142 | rel = (struct sccp_connection_released *) msg->l2h; |
| 143 | rel->type = SCCP_MSG_TYPE_RLSD; |
| 144 | rel->release_cause = SCCP_RELEASE_CAUSE_SCCP_FAILURE; |
| 145 | rel->destination_local_reference = conn->remote_ref; |
| 146 | rel->source_local_reference = conn->patched_ref; |
| 147 | |
| 148 | ipaccess_prepend_header(msg, IPAC_PROTO_SCCP); |
| 149 | |
| 150 | if (write_queue_enqueue(&msc_con->write_queue, msg) != 0) { |
| 151 | LOGP(DINP, LOGL_ERROR, "Failed to enqueue the write.\n"); |
| 152 | msgb_free(msg); |
| 153 | } |
| 154 | } |
| 155 | |
Holger Hans Peter Freyther | b8a3373 | 2010-04-08 11:28:12 +0200 | [diff] [blame] | 156 | static void nat_send_rlc(struct sccp_source_reference *src, |
| 157 | struct sccp_source_reference *dst) |
| 158 | { |
| 159 | struct sccp_connection_release_complete *rlc; |
| 160 | struct msgb *msg; |
| 161 | |
| 162 | msg = msgb_alloc_headroom(4096, 128, "rlc"); |
| 163 | if (!msg) { |
| 164 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate clear command.\n"); |
| 165 | return; |
| 166 | } |
| 167 | |
| 168 | msg->l2h = msgb_put(msg, sizeof(*rlc)); |
| 169 | rlc = (struct sccp_connection_release_complete *) msg->l2h; |
| 170 | rlc->type = SCCP_MSG_TYPE_RLC; |
| 171 | rlc->destination_local_reference = *dst; |
| 172 | rlc->source_local_reference = *src; |
| 173 | |
| 174 | ipaccess_prepend_header(msg, IPAC_PROTO_SCCP); |
| 175 | |
| 176 | if (write_queue_enqueue(&msc_con->write_queue, msg) != 0) { |
| 177 | LOGP(DINP, LOGL_ERROR, "Failed to enqueue the write.\n"); |
| 178 | msgb_free(msg); |
| 179 | } |
| 180 | } |
| 181 | |
Holger Hans Peter Freyther | d131b79 | 2010-03-31 07:30:58 +0200 | [diff] [blame] | 182 | static void send_mgcp_reset(struct bsc_connection *bsc) |
| 183 | { |
| 184 | static const u_int8_t mgcp_reset[] = { |
| 185 | "RSIP 1 13@mgw MGCP 1.0\r\n" |
| 186 | }; |
| 187 | |
| 188 | bsc_write_mgcp(bsc, mgcp_reset, sizeof mgcp_reset - 1); |
| 189 | } |
| 190 | |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 191 | /* |
| 192 | * Below is the handling of messages coming |
| 193 | * from the MSC and need to be forwarded to |
| 194 | * a real BSC. |
| 195 | */ |
| 196 | static void initialize_msc_if_needed() |
| 197 | { |
Holger Hans Peter Freyther | b752761 | 2010-04-07 11:20:36 +0200 | [diff] [blame] | 198 | if (nat->first_contact) |
| 199 | return; |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 200 | |
Holger Hans Peter Freyther | b752761 | 2010-04-07 11:20:36 +0200 | [diff] [blame] | 201 | nat->first_contact = 1; |
| 202 | msc_send_reset(msc_con); |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 203 | } |
| 204 | |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 205 | /* |
| 206 | * Currently we are lacking refcounting so we need to copy each message. |
| 207 | */ |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 208 | static void bsc_send_data(struct bsc_connection *bsc, const u_int8_t *data, unsigned int length, int proto) |
Holger Hans Peter Freyther | f7cb33c | 2010-03-26 07:20:59 +0100 | [diff] [blame] | 209 | { |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 210 | struct msgb *msg; |
| 211 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 212 | if (length > 4096 - 128) { |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 213 | LOGP(DINP, LOGL_ERROR, "Can not send message of that size.\n"); |
| 214 | return; |
| 215 | } |
| 216 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 217 | msg = msgb_alloc_headroom(4096, 128, "to-bsc"); |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 218 | if (!msg) { |
| 219 | LOGP(DINP, LOGL_ERROR, "Failed to allocate memory for BSC msg.\n"); |
| 220 | return; |
| 221 | } |
| 222 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 223 | msg->l2h = msgb_put(msg, length); |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 224 | memcpy(msg->data, data, length); |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 225 | |
| 226 | bsc_write(bsc, msg, proto); |
Holger Hans Peter Freyther | f7cb33c | 2010-03-26 07:20:59 +0100 | [diff] [blame] | 227 | } |
| 228 | |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 229 | static int forward_sccp_to_bts(struct msgb *msg) |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 230 | { |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 231 | struct sccp_connections *con; |
| 232 | struct bsc_connection *bsc; |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 233 | struct bsc_nat_parsed *parsed; |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 234 | int proto; |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 235 | |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 236 | /* filter, drop, patch the message? */ |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 237 | parsed = bsc_nat_parse(msg); |
| 238 | if (!parsed) { |
| 239 | 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] | 240 | return -1; |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 241 | } |
| 242 | |
Holger Hans Peter Freyther | 1d6fb18 | 2010-01-30 11:53:30 +0100 | [diff] [blame] | 243 | if (bsc_nat_filter_ipa(DIR_BSC, msg, parsed)) |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 244 | goto exit; |
Holger Hans Peter Freyther | 6a97b8d | 2010-06-15 18:45:26 +0800 | [diff] [blame] | 245 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 246 | proto = parsed->ipa_proto; |
| 247 | |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 248 | /* Route and modify the SCCP packet */ |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 249 | if (proto == IPAC_PROTO_SCCP) { |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 250 | switch (parsed->sccp_type) { |
| 251 | case SCCP_MSG_TYPE_UDT: |
| 252 | /* forward UDT messages to every BSC */ |
| 253 | goto send_to_all; |
| 254 | break; |
| 255 | case SCCP_MSG_TYPE_RLSD: |
| 256 | case SCCP_MSG_TYPE_CREF: |
| 257 | case SCCP_MSG_TYPE_DT1: |
Holger Hans Peter Freyther | f46ce53 | 2010-04-06 10:22:34 +0200 | [diff] [blame] | 258 | case SCCP_MSG_TYPE_IT: |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 259 | con = patch_sccp_src_ref_to_bsc(msg, parsed, nat); |
Holger Hans Peter Freyther | 465313e | 2010-06-15 18:49:53 +0800 | [diff] [blame] | 260 | if (parsed->gsm_type == BSS_MAP_MSG_ASSIGMENT_RQST) { |
Holger Hans Peter Freyther | d470286 | 2010-04-12 12:17:09 +0200 | [diff] [blame] | 261 | counter_inc(nat->stats.sccp.calls); |
| 262 | |
Holger Hans Peter Freyther | 465313e | 2010-06-15 18:49:53 +0800 | [diff] [blame] | 263 | if (con) { |
Holger Hans Peter Freyther | 3d0049f | 2010-04-18 01:35:41 +0800 | [diff] [blame] | 264 | counter_inc(con->bsc->cfg->stats.sccp.calls); |
Holger Hans Peter Freyther | 465313e | 2010-06-15 18:49:53 +0800 | [diff] [blame] | 265 | if (bsc_mgcp_assign(con, msg) != 0) |
| 266 | LOGP(DNAT, LOGL_ERROR, "Failed to assign...\n"); |
| 267 | } else |
| 268 | LOGP(DNAT, LOGL_ERROR, "Assignment command but no BSC.\n"); |
| 269 | } |
Holger Hans Peter Freyther | 16a6f70 | 2010-03-29 17:18:42 +0200 | [diff] [blame] | 270 | break; |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 271 | case SCCP_MSG_TYPE_CC: |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 272 | con = patch_sccp_src_ref_to_bsc(msg, parsed, nat); |
| 273 | if (!con || update_sccp_src_ref(con, parsed) != 0) |
Holger Hans Peter Freyther | 16a6f70 | 2010-03-29 17:18:42 +0200 | [diff] [blame] | 274 | goto exit; |
Holger Hans Peter Freyther | 0ab6bab | 2010-06-15 18:47:49 +0800 | [diff] [blame] | 275 | break; |
| 276 | case SCCP_MSG_TYPE_RLC: |
| 277 | LOGP(DNAT, LOGL_ERROR, "Unexpected release complete from MSC.\n"); |
| 278 | goto exit; |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 279 | break; |
| 280 | case SCCP_MSG_TYPE_CR: |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 281 | /* MSC never opens a SCCP connection, fall through */ |
| 282 | default: |
| 283 | goto exit; |
| 284 | } |
Holger Hans Peter Freyther | f464ea5 | 2010-04-06 16:07:44 +0200 | [diff] [blame] | 285 | |
Holger Hans Peter Freyther | b8a3373 | 2010-04-08 11:28:12 +0200 | [diff] [blame] | 286 | if (!con && parsed->sccp_type == SCCP_MSG_TYPE_RLSD) { |
| 287 | LOGP(DNAT, LOGL_NOTICE, "Sending fake RLC on RLSD message to network.\n"); |
| 288 | /* Exchange src/dest for the reply */ |
| 289 | nat_send_rlc(parsed->dest_local_ref, parsed->src_local_ref); |
| 290 | } else if (!con) |
Holger Hans Peter Freyther | f464ea5 | 2010-04-06 16:07:44 +0200 | [diff] [blame] | 291 | LOGP(DNAT, LOGL_ERROR, "Unknown connection for msg type: 0x%x.\n", parsed->sccp_type); |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 292 | } |
| 293 | |
| 294 | talloc_free(parsed); |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 295 | if (!con) |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 296 | return -1; |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 297 | if (!con->bsc->authenticated) { |
Holger Hans Peter Freyther | 6c45f2e | 2010-06-15 19:06:18 +0800 | [diff] [blame] | 298 | LOGP(DNAT, LOGL_ERROR, "Selected BSC not authenticated.\n"); |
Holger Hans Peter Freyther | 3f37b8f | 2010-02-08 23:24:32 +0100 | [diff] [blame] | 299 | return -1; |
| 300 | } |
| 301 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 302 | 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] | 303 | return 0; |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 304 | |
| 305 | send_to_all: |
Holger Hans Peter Freyther | 45d1181 | 2010-06-15 18:46:36 +0800 | [diff] [blame] | 306 | /* |
| 307 | * Filter Paging from the network. We do not want to send a PAGING |
| 308 | * Command to every BSC in our network. We will analys the PAGING |
| 309 | * message and then send it to the authenticated messages... |
| 310 | */ |
| 311 | 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] | 312 | int lac; |
| 313 | bsc = bsc_nat_find_bsc(nat, msg, &lac); |
Holger Hans Peter Freyther | 62e5843 | 2010-04-21 19:05:14 +0800 | [diff] [blame] | 314 | if (bsc && bsc->cfg->forbid_paging) |
| 315 | LOGP(DNAT, LOGL_NOTICE, "Paging forbidden for BTS: %d\n", bsc->cfg->nr); |
| 316 | else if (bsc) |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 317 | bsc_send_data(bsc, msg->l2h, msgb_l2len(msg), parsed->ipa_proto); |
Holger Hans Peter Freyther | bae9da4 | 2010-03-30 05:57:42 +0200 | [diff] [blame] | 318 | else |
Holger Hans Peter Freyther | 979a309 | 2010-04-17 08:07:19 +0200 | [diff] [blame] | 319 | LOGP(DNAT, LOGL_ERROR, "Could not determine BSC for paging on lac: %d/0x%x\n", |
| 320 | lac, lac); |
Holger Hans Peter Freyther | 45d1181 | 2010-06-15 18:46:36 +0800 | [diff] [blame] | 321 | |
| 322 | goto exit; |
| 323 | } |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 324 | /* currently send this to every BSC connected */ |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 325 | llist_for_each_entry(bsc, &nat->bsc_connections, list_entry) { |
Holger Hans Peter Freyther | 3f37b8f | 2010-02-08 23:24:32 +0100 | [diff] [blame] | 326 | if (!bsc->authenticated) |
| 327 | continue; |
| 328 | |
Holger Hans Peter Freyther | 2896df7 | 2010-04-08 10:24:57 +0200 | [diff] [blame] | 329 | 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] | 330 | } |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 331 | |
| 332 | exit: |
| 333 | talloc_free(parsed); |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 334 | return 0; |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 335 | } |
| 336 | |
Holger Hans Peter Freyther | baf2abe | 2010-06-15 18:47:29 +0800 | [diff] [blame] | 337 | static void msc_connection_was_lost(struct bsc_msc_connection *con) |
| 338 | { |
Holger Hans Peter Freyther | cd89537 | 2010-03-29 08:04:09 +0200 | [diff] [blame] | 339 | struct bsc_connection *bsc, *tmp; |
| 340 | |
Holger Hans Peter Freyther | a4ed81c | 2010-04-12 12:35:02 +0200 | [diff] [blame] | 341 | counter_inc(nat->stats.msc.reconn); |
| 342 | |
Holger Hans Peter Freyther | cd89537 | 2010-03-29 08:04:09 +0200 | [diff] [blame] | 343 | LOGP(DMSC, LOGL_ERROR, "Closing all connections downstream.\n"); |
| 344 | llist_for_each_entry_safe(bsc, tmp, &nat->bsc_connections, list_entry) |
| 345 | remove_bsc_connection(bsc); |
| 346 | |
Holger Hans Peter Freyther | b752761 | 2010-04-07 11:20:36 +0200 | [diff] [blame] | 347 | nat->first_contact = 0; |
Holger Hans Peter Freyther | 241e130 | 2010-03-31 09:16:56 +0200 | [diff] [blame] | 348 | bsc_mgcp_free_endpoints(nat); |
Holger Hans Peter Freyther | cd89537 | 2010-03-29 08:04:09 +0200 | [diff] [blame] | 349 | bsc_msc_schedule_connect(con); |
Holger Hans Peter Freyther | baf2abe | 2010-06-15 18:47:29 +0800 | [diff] [blame] | 350 | } |
| 351 | |
Holger Hans Peter Freyther | 02aee14 | 2010-04-08 10:31:07 +0200 | [diff] [blame] | 352 | 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] | 353 | { |
| 354 | static const u_int8_t reset[] = { |
Holger Hans Peter Freyther | 7cab166 | 2010-04-07 11:11:11 +0200 | [diff] [blame] | 355 | 0x00, 0x12, 0xfd, |
Holger Hans Peter Freyther | af0ff6c | 2010-04-07 10:46:30 +0200 | [diff] [blame] | 356 | 0x09, 0x00, 0x03, 0x05, 0x07, 0x02, 0x42, 0xfe, |
| 357 | 0x02, 0x42, 0xfe, 0x06, 0x00, 0x04, 0x30, 0x04, |
| 358 | 0x01, 0x20 |
| 359 | }; |
| 360 | |
| 361 | struct msgb *msg; |
| 362 | |
| 363 | msg = msgb_alloc_headroom(4096, 128, "08.08 reset"); |
| 364 | if (!msg) { |
| 365 | LOGP(DMSC, LOGL_ERROR, "Failed to allocate reset msg.\n"); |
| 366 | return; |
| 367 | } |
| 368 | |
| 369 | msg->l2h = msgb_put(msg, sizeof(reset)); |
| 370 | memcpy(msg->l2h, reset, msgb_l2len(msg)); |
| 371 | |
Holger Hans Peter Freyther | 02aee14 | 2010-04-08 10:31:07 +0200 | [diff] [blame] | 372 | if (write_queue_enqueue(&msc_con->write_queue, msg) != 0) { |
Holger Hans Peter Freyther | af0ff6c | 2010-04-07 10:46:30 +0200 | [diff] [blame] | 373 | LOGP(DMSC, LOGL_ERROR, "Failed to enqueue reset msg.\n"); |
| 374 | msgb_free(msg); |
| 375 | } |
| 376 | |
| 377 | LOGP(DMSC, LOGL_NOTICE, "Scheduled GSM0808 reset msg for the MSC.\n"); |
| 378 | } |
| 379 | |
Holger Hans Peter Freyther | 6f5fbfd | 2010-06-15 18:47:02 +0800 | [diff] [blame] | 380 | static int ipaccess_msc_read_cb(struct bsc_fd *bfd) |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 381 | { |
| 382 | int error; |
| 383 | struct msgb *msg = ipaccess_read_msg(bfd, &error); |
| 384 | struct ipaccess_head *hh; |
| 385 | |
| 386 | if (!msg) { |
| 387 | if (error == 0) { |
Holger Hans Peter Freyther | 418f394 | 2010-01-29 05:58:43 +0100 | [diff] [blame] | 388 | LOGP(DNAT, LOGL_FATAL, "The connection the MSC was lost, exiting\n"); |
Holger Hans Peter Freyther | baf2abe | 2010-06-15 18:47:29 +0800 | [diff] [blame] | 389 | bsc_msc_lost(msc_con); |
| 390 | return -1; |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 391 | } |
| 392 | |
Holger Hans Peter Freyther | 418f394 | 2010-01-29 05:58:43 +0100 | [diff] [blame] | 393 | 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] | 394 | return -1; |
| 395 | } |
| 396 | |
Holger Hans Peter Freyther | 418f394 | 2010-01-29 05:58:43 +0100 | [diff] [blame] | 397 | 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] | 398 | |
| 399 | /* handle base message handling */ |
| 400 | hh = (struct ipaccess_head *) msg->data; |
| 401 | ipaccess_rcvmsg_base(msg, bfd); |
| 402 | |
| 403 | /* initialize the networking. This includes sending a GSM08.08 message */ |
| 404 | if (hh->proto == IPAC_PROTO_IPACCESS && msg->l2h[0] == IPAC_MSGT_ID_ACK) |
| 405 | initialize_msc_if_needed(); |
| 406 | else if (hh->proto == IPAC_PROTO_SCCP) |
| 407 | forward_sccp_to_bts(msg); |
| 408 | |
Holger Hans Peter Freyther | aad68b5 | 2010-06-15 18:46:48 +0800 | [diff] [blame] | 409 | msgb_free(msg); |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 410 | return 0; |
| 411 | } |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 412 | |
Holger Hans Peter Freyther | 6f5fbfd | 2010-06-15 18:47:02 +0800 | [diff] [blame] | 413 | static int ipaccess_msc_write_cb(struct bsc_fd *bfd, struct msgb *msg) |
| 414 | { |
| 415 | int rc; |
| 416 | rc = write(bfd->fd, msg->data, msg->len); |
| 417 | |
| 418 | if (rc != msg->len) { |
| 419 | LOGP(DNAT, LOGL_ERROR, "Failed to write MSG to MSC.\n"); |
| 420 | return -1; |
| 421 | } |
| 422 | |
| 423 | return rc; |
| 424 | } |
| 425 | |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 426 | /* |
| 427 | * Below is the handling of messages coming |
| 428 | * from the BSC and need to be forwarded to |
| 429 | * a real BSC. |
| 430 | */ |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 431 | |
| 432 | /* |
| 433 | * Remove the connection from the connections list, |
| 434 | * remove it from the patching of SCCP header lists |
| 435 | * as well. Maybe in the future even close connection.. |
| 436 | */ |
| 437 | static void remove_bsc_connection(struct bsc_connection *connection) |
| 438 | { |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 439 | struct sccp_connections *sccp_patch, *tmp; |
Holger Hans Peter Freyther | ed07a3f | 2010-06-15 18:47:10 +0800 | [diff] [blame] | 440 | bsc_unregister_fd(&connection->write_queue.bfd); |
| 441 | close(connection->write_queue.bfd.fd); |
Holger Hans Peter Freyther | f38e879 | 2010-03-26 09:27:08 +0100 | [diff] [blame] | 442 | write_queue_clear(&connection->write_queue); |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 443 | llist_del(&connection->list_entry); |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 444 | |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 445 | /* stop the timeout timer */ |
| 446 | bsc_del_timer(&connection->id_timeout); |
| 447 | |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 448 | /* remove all SCCP connections */ |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 449 | 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] | 450 | if (sccp_patch->bsc != connection) |
| 451 | continue; |
| 452 | |
Holger Hans Peter Freyther | 6b087d1 | 2010-04-06 17:32:58 +0200 | [diff] [blame] | 453 | nat_send_rlsd(sccp_patch); |
Holger Hans Peter Freyther | 23fe7be | 2010-03-30 10:45:48 +0200 | [diff] [blame] | 454 | sccp_connection_destroy(sccp_patch); |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 455 | } |
| 456 | |
Holger Hans Peter Freyther | 26a4389 | 2010-04-05 23:09:27 +0200 | [diff] [blame] | 457 | /* close endpoints allocated by this BSC */ |
| 458 | bsc_mgcp_clear_endpoints_for(connection); |
| 459 | |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 460 | talloc_free(connection); |
| 461 | } |
| 462 | |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 463 | static void ipaccess_close_bsc(void *data) |
| 464 | { |
Holger Hans Peter Freyther | 6d5a600 | 2010-04-17 07:58:17 +0200 | [diff] [blame] | 465 | struct sockaddr_in sock; |
| 466 | socklen_t len = sizeof(sock); |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 467 | struct bsc_connection *conn = data; |
| 468 | |
Holger Hans Peter Freyther | 6d5a600 | 2010-04-17 07:58:17 +0200 | [diff] [blame] | 469 | |
| 470 | getpeername(conn->write_queue.bfd.fd, (struct sockaddr *) &sock, &len); |
| 471 | LOGP(DNAT, LOGL_ERROR, "BSC on %s didn't respond to identity request. Closing.\n", |
| 472 | inet_ntoa(sock.sin_addr)); |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 473 | remove_bsc_connection(conn); |
| 474 | } |
| 475 | |
| 476 | static void ipaccess_auth_bsc(struct tlv_parsed *tvp, struct bsc_connection *bsc) |
| 477 | { |
| 478 | struct bsc_config *conf; |
| 479 | const char* token = (const char *) TLVP_VAL(tvp, IPAC_IDTAG_UNITNAME); |
| 480 | |
| 481 | llist_for_each_entry(conf, &bsc->nat->bsc_configs, entry) { |
| 482 | if (strcmp(conf->token, token) == 0) { |
Holger Hans Peter Freyther | d470286 | 2010-04-12 12:17:09 +0200 | [diff] [blame] | 483 | counter_inc(conf->stats.net.reconn); |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 484 | bsc->authenticated = 1; |
Holger Hans Peter Freyther | 47dd494 | 2010-04-06 15:11:34 +0200 | [diff] [blame] | 485 | bsc->cfg = conf; |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 486 | bsc_del_timer(&bsc->id_timeout); |
Holger Hans Peter Freyther | 47dd494 | 2010-04-06 15:11:34 +0200 | [diff] [blame] | 487 | LOGP(DNAT, LOGL_NOTICE, "Authenticated bsc nr: %d lac: %d\n", conf->nr, conf->lac); |
Holger Hans Peter Freyther | c615c26 | 2010-04-17 07:59:57 +0200 | [diff] [blame] | 488 | return; |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 489 | } |
| 490 | } |
Holger Hans Peter Freyther | c615c26 | 2010-04-17 07:59:57 +0200 | [diff] [blame] | 491 | |
| 492 | LOGP(DNAT, LOGL_ERROR, "No bsc found for token %s.\n", token); |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 493 | } |
| 494 | |
Holger Hans Peter Freyther | 747d654 | 2010-03-26 07:24:34 +0100 | [diff] [blame] | 495 | 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] | 496 | { |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 497 | struct sccp_connections *con; |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 498 | struct bsc_nat_parsed *parsed; |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 499 | |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 500 | /* Parse and filter messages */ |
| 501 | parsed = bsc_nat_parse(msg); |
| 502 | if (!parsed) { |
| 503 | 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] | 504 | msgb_free(msg); |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 505 | return -1; |
| 506 | } |
| 507 | |
Holger Hans Peter Freyther | 1d6fb18 | 2010-01-30 11:53:30 +0100 | [diff] [blame] | 508 | if (bsc_nat_filter_ipa(DIR_MSC, msg, parsed)) |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 509 | goto exit; |
Holger Hans Peter Freyther | 6a97b8d | 2010-06-15 18:45:26 +0800 | [diff] [blame] | 510 | |
Holger Hans Peter Freyther | bbb9d39 | 2010-04-02 03:42:44 +0200 | [diff] [blame] | 511 | /* |
| 512 | * check authentication after filtering to not reject auth |
| 513 | * responses coming from the BSC. We have to make sure that |
| 514 | * nothing from the exit path will forward things to the MSC |
| 515 | */ |
| 516 | if (!bsc->authenticated) { |
| 517 | LOGP(DNAT, LOGL_ERROR, "BSC is not authenticated.\n"); |
| 518 | msgb_free(msg); |
| 519 | return -1; |
| 520 | } |
| 521 | |
| 522 | |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 523 | /* modify the SCCP entries */ |
| 524 | if (parsed->ipa_proto == IPAC_PROTO_SCCP) { |
| 525 | switch (parsed->sccp_type) { |
| 526 | case SCCP_MSG_TYPE_CR: |
| 527 | if (create_sccp_src_ref(bsc, msg, parsed) != 0) |
| 528 | goto exit2; |
Holger Hans Peter Freyther | b5513ca | 2010-04-21 18:56:12 +0800 | [diff] [blame] | 529 | con = patch_sccp_src_ref_to_msc(msg, parsed, bsc); |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 530 | break; |
| 531 | case SCCP_MSG_TYPE_RLSD: |
| 532 | case SCCP_MSG_TYPE_CREF: |
| 533 | case SCCP_MSG_TYPE_DT1: |
| 534 | case SCCP_MSG_TYPE_CC: |
Holger Hans Peter Freyther | f46ce53 | 2010-04-06 10:22:34 +0200 | [diff] [blame] | 535 | case SCCP_MSG_TYPE_IT: |
Holger Hans Peter Freyther | b5513ca | 2010-04-21 18:56:12 +0800 | [diff] [blame] | 536 | con = patch_sccp_src_ref_to_msc(msg, parsed, bsc); |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 537 | break; |
| 538 | case SCCP_MSG_TYPE_RLC: |
Holger Hans Peter Freyther | b5513ca | 2010-04-21 18:56:12 +0800 | [diff] [blame] | 539 | con = patch_sccp_src_ref_to_msc(msg, parsed, bsc); |
Holger Hans Peter Freyther | f4cfc4f | 2010-03-31 09:15:05 +0200 | [diff] [blame] | 540 | remove_sccp_src_ref(bsc, msg, parsed); |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 541 | break; |
| 542 | case SCCP_MSG_TYPE_UDT: |
| 543 | /* simply forward everything */ |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 544 | con = NULL; |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 545 | break; |
| 546 | default: |
Holger Hans Peter Freyther | 0ab6bab | 2010-06-15 18:47:49 +0800 | [diff] [blame] | 547 | 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] | 548 | con = NULL; |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 549 | goto exit2; |
| 550 | break; |
| 551 | } |
Holger Hans Peter Freyther | 3c3bce1 | 2010-04-01 10:16:28 +0200 | [diff] [blame] | 552 | } else if (parsed->ipa_proto == NAT_IPAC_PROTO_MGCP) { |
| 553 | bsc_mgcp_forward(bsc, msg); |
| 554 | goto exit2; |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 555 | } else { |
| 556 | LOGP(DNAT, LOGL_ERROR, "Not forwarding unknown stream id: 0x%x\n", parsed->ipa_proto); |
| 557 | goto exit2; |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 558 | } |
| 559 | |
Holger Hans Peter Freyther | 49c7fb5 | 2010-06-15 18:48:55 +0800 | [diff] [blame] | 560 | if (con && con->bsc != bsc) { |
Holger Hans Peter Freyther | ca0c2f9 | 2010-04-21 18:49:55 +0800 | [diff] [blame] | 561 | LOGP(DNAT, LOGL_ERROR, "The connection belongs to a different BTS: input: %d con: %d\n", |
| 562 | bsc->cfg->nr, con->bsc->cfg->nr); |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 563 | goto exit2; |
| 564 | } |
| 565 | |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 566 | /* send the non-filtered but maybe modified msg */ |
Holger Hans Peter Freyther | baf2abe | 2010-06-15 18:47:29 +0800 | [diff] [blame] | 567 | if (write_queue_enqueue(&msc_con->write_queue, msg) != 0) { |
Holger Hans Peter Freyther | 6f5fbfd | 2010-06-15 18:47:02 +0800 | [diff] [blame] | 568 | LOGP(DNAT, LOGL_ERROR, "Can not queue message for the MSC.\n"); |
| 569 | msgb_free(msg); |
| 570 | } |
Holger Hans Peter Freyther | 38a77d0 | 2010-01-30 12:45:10 +0100 | [diff] [blame] | 571 | talloc_free(parsed); |
Holger Hans Peter Freyther | 6f5fbfd | 2010-06-15 18:47:02 +0800 | [diff] [blame] | 572 | return 0; |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 573 | |
| 574 | exit: |
Holger Hans Peter Freyther | 38a77d0 | 2010-01-30 12:45:10 +0100 | [diff] [blame] | 575 | /* if we filter out the reset send an ack to the BSC */ |
| 576 | 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] | 577 | send_reset_ack(bsc); |
| 578 | send_reset_ack(bsc); |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 579 | } else if (parsed->ipa_proto == IPAC_PROTO_IPACCESS) { |
| 580 | /* do we know who is handling this? */ |
| 581 | if (msg->l2h[0] == IPAC_MSGT_ID_RESP) { |
| 582 | struct tlv_parsed tvp; |
| 583 | ipaccess_idtag_parse(&tvp, |
| 584 | (unsigned char *) msg->l2h + 2, |
| 585 | msgb_l2len(msg) - 2); |
| 586 | if (TLVP_PRESENT(&tvp, IPAC_IDTAG_UNITNAME)) |
| 587 | ipaccess_auth_bsc(&tvp, bsc); |
| 588 | } |
| 589 | |
| 590 | goto exit2; |
Holger Hans Peter Freyther | 38a77d0 | 2010-01-30 12:45:10 +0100 | [diff] [blame] | 591 | } |
| 592 | |
Holger Hans Peter Freyther | 058eeb7 | 2010-01-31 09:46:21 +0100 | [diff] [blame] | 593 | exit2: |
Holger Hans Peter Freyther | 0b8f69d | 2010-06-15 18:45:38 +0800 | [diff] [blame] | 594 | talloc_free(parsed); |
Holger Hans Peter Freyther | 6f5fbfd | 2010-06-15 18:47:02 +0800 | [diff] [blame] | 595 | msgb_free(msg); |
| 596 | return -1; |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 597 | } |
| 598 | |
Holger Hans Peter Freyther | ed07a3f | 2010-06-15 18:47:10 +0800 | [diff] [blame] | 599 | static int ipaccess_bsc_read_cb(struct bsc_fd *bfd) |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 600 | { |
| 601 | int error; |
Holger Hans Peter Freyther | 747d654 | 2010-03-26 07:24:34 +0100 | [diff] [blame] | 602 | struct bsc_connection *bsc = bfd->data; |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 603 | struct msgb *msg = ipaccess_read_msg(bfd, &error); |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 604 | |
| 605 | if (!msg) { |
| 606 | if (error == 0) { |
Holger Hans Peter Freyther | 418f394 | 2010-01-29 05:58:43 +0100 | [diff] [blame] | 607 | LOGP(DNAT, LOGL_ERROR, "The connection to the BSC was lost. Cleaning it\n"); |
Holger Hans Peter Freyther | 747d654 | 2010-03-26 07:24:34 +0100 | [diff] [blame] | 608 | remove_bsc_connection(bsc); |
Holger Hans Peter Freyther | 418f394 | 2010-01-29 05:58:43 +0100 | [diff] [blame] | 609 | } else { |
| 610 | LOGP(DNAT, LOGL_ERROR, "Failed to parse ip access message: %d\n", error); |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 611 | } |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 612 | return -1; |
| 613 | } |
| 614 | |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 615 | |
Holger Hans Peter Freyther | 418f394 | 2010-01-29 05:58:43 +0100 | [diff] [blame] | 616 | 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] | 617 | |
| 618 | /* Handle messages from the BSC */ |
| 619 | /* FIXME: Currently no PONG is sent to the BSC */ |
| 620 | /* FIXME: Currently no ID ACK is sent to the BSC */ |
Holger Hans Peter Freyther | 747d654 | 2010-03-26 07:24:34 +0100 | [diff] [blame] | 621 | forward_sccp_to_msc(bsc, msg); |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 622 | |
| 623 | return 0; |
| 624 | } |
| 625 | |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 626 | static int ipaccess_bsc_write_cb(struct bsc_fd *bfd, struct msgb *msg) |
| 627 | { |
| 628 | int rc; |
| 629 | |
| 630 | rc = write(bfd->fd, msg->data, msg->len); |
| 631 | if (rc != msg->len) |
| 632 | LOGP(DNAT, LOGL_ERROR, "Failed to write message to the BSC.\n"); |
| 633 | |
| 634 | return rc; |
| 635 | } |
| 636 | |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 637 | static int ipaccess_listen_bsc_cb(struct bsc_fd *bfd, unsigned int what) |
| 638 | { |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 639 | struct bsc_connection *bsc; |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 640 | int ret; |
| 641 | struct sockaddr_in sa; |
| 642 | socklen_t sa_len = sizeof(sa); |
| 643 | |
| 644 | if (!(what & BSC_FD_READ)) |
| 645 | return 0; |
| 646 | |
| 647 | ret = accept(bfd->fd, (struct sockaddr *) &sa, &sa_len); |
| 648 | if (ret < 0) { |
| 649 | perror("accept"); |
| 650 | return ret; |
| 651 | } |
| 652 | |
Holger Hans Peter Freyther | d470286 | 2010-04-12 12:17:09 +0200 | [diff] [blame] | 653 | /* count the reconnect */ |
| 654 | counter_inc(nat->stats.bsc.reconn); |
| 655 | |
Holger Hans Peter Freyther | cd89537 | 2010-03-29 08:04:09 +0200 | [diff] [blame] | 656 | /* |
| 657 | * if we are not connected to a msc... just close the socket |
| 658 | */ |
| 659 | if (!msc_con->is_connected) { |
| 660 | LOGP(DNAT, LOGL_NOTICE, "Disconnecting BSC due lack of MSC connection.\n"); |
Holger Hans Peter Freyther | a7c377d | 2010-04-06 12:42:35 +0200 | [diff] [blame] | 661 | close(ret); |
Holger Hans Peter Freyther | cd89537 | 2010-03-29 08:04:09 +0200 | [diff] [blame] | 662 | return 0; |
| 663 | } |
| 664 | |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 665 | /* todo... do something with the connection */ |
Holger Hans Peter Freyther | da86c0a | 2010-01-12 21:35:32 +0100 | [diff] [blame] | 666 | /* 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] | 667 | |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 668 | /* |
| 669 | * |
| 670 | */ |
Holger Hans Peter Freyther | dcf8a7d | 2010-06-15 18:48:01 +0800 | [diff] [blame] | 671 | bsc = bsc_connection_alloc(nat); |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 672 | if (!bsc) { |
Holger Hans Peter Freyther | 418f394 | 2010-01-29 05:58:43 +0100 | [diff] [blame] | 673 | LOGP(DNAT, LOGL_ERROR, "Failed to allocate BSC struct.\n"); |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 674 | close(ret); |
| 675 | return -1; |
| 676 | } |
| 677 | |
Holger Hans Peter Freyther | ed07a3f | 2010-06-15 18:47:10 +0800 | [diff] [blame] | 678 | write_queue_init(&bsc->write_queue, 100); |
| 679 | bsc->write_queue.bfd.data = bsc; |
| 680 | bsc->write_queue.bfd.fd = ret; |
| 681 | bsc->write_queue.read_cb = ipaccess_bsc_read_cb; |
Holger Hans Peter Freyther | 3025e19 | 2010-03-26 09:18:02 +0100 | [diff] [blame] | 682 | bsc->write_queue.write_cb = ipaccess_bsc_write_cb; |
Holger Hans Peter Freyther | ed07a3f | 2010-06-15 18:47:10 +0800 | [diff] [blame] | 683 | bsc->write_queue.bfd.when = BSC_FD_READ; |
| 684 | if (bsc_register_fd(&bsc->write_queue.bfd) < 0) { |
Holger Hans Peter Freyther | 418f394 | 2010-01-29 05:58:43 +0100 | [diff] [blame] | 685 | LOGP(DNAT, LOGL_ERROR, "Failed to register BSC fd.\n"); |
Holger Hans Peter Freyther | 24614ad | 2010-01-13 09:28:12 +0100 | [diff] [blame] | 686 | close(ret); |
| 687 | talloc_free(bsc); |
| 688 | return -2; |
| 689 | } |
| 690 | |
Holger Hans Peter Freyther | b9ac37d | 2010-04-05 17:58:52 +0200 | [diff] [blame] | 691 | LOGP(DNAT, LOGL_NOTICE, "Registered new BSC\n"); |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 692 | llist_add(&bsc->list_entry, &nat->bsc_connections); |
Holger Hans Peter Freyther | db7ba7d | 2010-03-26 07:41:54 +0100 | [diff] [blame] | 693 | send_id_ack(bsc); |
| 694 | send_id_req(bsc); |
Holger Hans Peter Freyther | d131b79 | 2010-03-31 07:30:58 +0200 | [diff] [blame] | 695 | send_mgcp_reset(bsc); |
Holger Hans Peter Freyther | aa69824 | 2010-06-15 18:46:19 +0800 | [diff] [blame] | 696 | |
| 697 | /* |
| 698 | * start the hangup timer |
| 699 | */ |
| 700 | bsc->id_timeout.data = bsc; |
| 701 | bsc->id_timeout.cb = ipaccess_close_bsc; |
| 702 | bsc_schedule_timer(&bsc->id_timeout, 2, 0); |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 703 | return 0; |
| 704 | } |
| 705 | |
| 706 | static int listen_for_bsc(struct bsc_fd *bfd, struct in_addr *in_addr, int port) |
| 707 | { |
| 708 | struct sockaddr_in addr; |
| 709 | int ret, on = 1; |
| 710 | |
| 711 | bfd->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 712 | bfd->cb = ipaccess_listen_bsc_cb; |
| 713 | bfd->when = BSC_FD_READ; |
| 714 | |
| 715 | memset(&addr, 0, sizeof(addr)); |
| 716 | addr.sin_family = AF_INET; |
| 717 | addr.sin_port = htons(port); |
| 718 | addr.sin_addr.s_addr = in_addr->s_addr; |
| 719 | |
| 720 | setsockopt(bfd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 721 | |
| 722 | ret = bind(bfd->fd, (struct sockaddr *) &addr, sizeof(addr)); |
| 723 | if (ret < 0) { |
| 724 | fprintf(stderr, "Could not bind the BSC socket %s\n", |
| 725 | strerror(errno)); |
| 726 | return -EIO; |
| 727 | } |
| 728 | |
| 729 | ret = listen(bfd->fd, 1); |
| 730 | if (ret < 0) { |
| 731 | perror("listen"); |
| 732 | return ret; |
| 733 | } |
| 734 | |
| 735 | ret = bsc_register_fd(bfd); |
| 736 | if (ret < 0) { |
| 737 | perror("register_listen_fd"); |
| 738 | return ret; |
| 739 | } |
| 740 | return 0; |
| 741 | } |
| 742 | |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 743 | static void print_usage() |
| 744 | { |
| 745 | printf("Usage: bsc_nat\n"); |
| 746 | } |
| 747 | |
| 748 | static void print_help() |
| 749 | { |
| 750 | printf(" Some useful help...\n"); |
| 751 | printf(" -h --help this text\n"); |
| 752 | printf(" -d option --debug=DRLL:DCC:DMM:DRR:DRSL:DNM enable debugging\n"); |
| 753 | printf(" -s --disable-color\n"); |
| 754 | printf(" -c --config-file filename The config file to use.\n"); |
| 755 | printf(" -m --msc=IP. The address of the MSC.\n"); |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 756 | 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] | 757 | } |
| 758 | |
| 759 | static void handle_options(int argc, char** argv) |
| 760 | { |
| 761 | while (1) { |
| 762 | int option_index = 0, c; |
| 763 | static struct option long_options[] = { |
| 764 | {"help", 0, 0, 'h'}, |
| 765 | {"debug", 1, 0, 'd'}, |
| 766 | {"config-file", 1, 0, 'c'}, |
| 767 | {"disable-color", 0, 0, 's'}, |
| 768 | {"timestamp", 0, 0, 'T'}, |
| 769 | {"msc", 1, 0, 'm'}, |
| 770 | {"local", 1, 0, 'l'}, |
| 771 | {0, 0, 0, 0} |
| 772 | }; |
| 773 | |
| 774 | c = getopt_long(argc, argv, "hd:sTPc:m:l:", |
| 775 | long_options, &option_index); |
| 776 | if (c == -1) |
| 777 | break; |
| 778 | |
| 779 | switch (c) { |
| 780 | case 'h': |
| 781 | print_usage(); |
| 782 | print_help(); |
| 783 | exit(0); |
| 784 | case 's': |
Holger Hans Peter Freyther | fb7a934 | 2010-06-15 19:14:12 +0800 | [diff] [blame] | 785 | log_set_use_color(stderr_target, 0); |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 786 | break; |
| 787 | case 'd': |
Holger Hans Peter Freyther | fb7a934 | 2010-06-15 19:14:12 +0800 | [diff] [blame] | 788 | log_parse_category_mask(stderr_target, optarg); |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 789 | break; |
| 790 | case 'c': |
| 791 | config_file = strdup(optarg); |
| 792 | break; |
| 793 | case 'T': |
Holger Hans Peter Freyther | fb7a934 | 2010-06-15 19:14:12 +0800 | [diff] [blame] | 794 | log_set_print_timestamp(stderr_target, 1); |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 795 | break; |
| 796 | case 'm': |
Holger Hans Peter Freyther | a88742c | 2010-06-15 18:51:04 +0800 | [diff] [blame] | 797 | msc_ip = optarg; |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 798 | break; |
| 799 | case 'l': |
| 800 | inet_aton(optarg, &local_addr); |
| 801 | break; |
| 802 | default: |
| 803 | /* ignore */ |
| 804 | break; |
| 805 | } |
| 806 | } |
| 807 | } |
| 808 | |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 809 | static void signal_handler(int signal) |
| 810 | { |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 811 | switch (signal) { |
| 812 | case SIGABRT: |
| 813 | /* in case of abort, we want to obtain a talloc report |
| 814 | * and then return to the caller, who will abort the process */ |
| 815 | case SIGUSR1: |
| 816 | talloc_report_full(tall_bsc_ctx, stderr); |
| 817 | break; |
| 818 | default: |
| 819 | break; |
| 820 | } |
| 821 | } |
| 822 | |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 823 | int main(int argc, char** argv) |
| 824 | { |
Holger Hans Peter Freyther | fb7a934 | 2010-06-15 19:14:12 +0800 | [diff] [blame] | 825 | log_init(&log_info); |
| 826 | stderr_target = log_target_create_stderr(); |
| 827 | log_add_target(stderr_target); |
| 828 | log_set_all_filter(stderr_target, 1); |
Holger Hans Peter Freyther | 6c45f2e | 2010-06-15 19:06:18 +0800 | [diff] [blame] | 829 | |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 830 | nat = bsc_nat_alloc(); |
| 831 | if (!nat) { |
| 832 | fprintf(stderr, "Failed to allocate the BSC nat.\n"); |
| 833 | return -4; |
| 834 | } |
| 835 | |
Holger Hans Peter Freyther | f7d3335 | 2010-06-15 18:50:26 +0800 | [diff] [blame] | 836 | nat->mgcp_cfg = talloc_zero(nat, struct mgcp_config); |
Holger Hans Peter Freyther | a88742c | 2010-06-15 18:51:04 +0800 | [diff] [blame] | 837 | if (!nat->mgcp_cfg) { |
| 838 | fprintf(stderr, "Failed to allocate MGCP cfg.\n"); |
| 839 | return -5; |
| 840 | } |
| 841 | |
| 842 | /* parse options */ |
| 843 | local_addr.s_addr = INADDR_ANY; |
| 844 | handle_options(argc, argv); |
Holger Hans Peter Freyther | f7d3335 | 2010-06-15 18:50:26 +0800 | [diff] [blame] | 845 | |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 846 | /* init vty and parse */ |
| 847 | bsc_nat_vty_init(nat); |
| 848 | telnet_init(NULL, 4244); |
Holger Hans Peter Freyther | f7d3335 | 2010-06-15 18:50:26 +0800 | [diff] [blame] | 849 | if (mgcp_parse_config(config_file, nat->mgcp_cfg) < 0) { |
Holger Hans Peter Freyther | 9a85ef3 | 2010-06-15 18:46:11 +0800 | [diff] [blame] | 850 | fprintf(stderr, "Failed to parse the config file: '%s'\n", config_file); |
| 851 | return -3; |
| 852 | } |
| 853 | |
Holger Hans Peter Freyther | a88742c | 2010-06-15 18:51:04 +0800 | [diff] [blame] | 854 | /* over rule the VTY config */ |
| 855 | if (msc_ip) |
| 856 | bsc_nat_set_msc_ip(nat, msc_ip); |
| 857 | |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 858 | /* seed the PRNG */ |
| 859 | srand(time(NULL)); |
| 860 | |
Holger Hans Peter Freyther | a7f8018 | 2010-03-31 13:02:22 +0200 | [diff] [blame] | 861 | /* |
| 862 | * Setup the MGCP code.. |
| 863 | */ |
| 864 | if (bsc_mgcp_init(nat) != 0) |
| 865 | return -4; |
| 866 | |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 867 | /* connect to the MSC */ |
Holger Hans Peter Freyther | 8139553 | 2010-04-17 07:48:45 +0200 | [diff] [blame] | 868 | msc_con = bsc_msc_create(nat->msc_ip, nat->msc_port); |
Holger Hans Peter Freyther | baf2abe | 2010-06-15 18:47:29 +0800 | [diff] [blame] | 869 | if (!msc_con) { |
| 870 | fprintf(stderr, "Creating a bsc_msc_connection failed.\n"); |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 871 | exit(1); |
| 872 | } |
| 873 | |
Holger Hans Peter Freyther | baf2abe | 2010-06-15 18:47:29 +0800 | [diff] [blame] | 874 | msc_con->connection_loss = msc_connection_was_lost; |
| 875 | msc_con->write_queue.read_cb = ipaccess_msc_read_cb; |
| 876 | msc_con->write_queue.write_cb = ipaccess_msc_write_cb;; |
| 877 | bsc_msc_connect(msc_con); |
| 878 | |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 879 | /* wait for the BSC */ |
Holger Hans Peter Freyther | 2d677c6 | 2010-03-26 06:51:04 +0100 | [diff] [blame] | 880 | if (listen_for_bsc(&bsc_listen, &local_addr, 5000) < 0) { |
Holger Hans Peter Freyther | 49d8068 | 2010-01-12 21:34:54 +0100 | [diff] [blame] | 881 | fprintf(stderr, "Failed to listen for BSC.\n"); |
| 882 | exit(1); |
| 883 | } |
| 884 | |
Holger Hans Peter Freyther | 6ace522 | 2010-01-12 21:15:08 +0100 | [diff] [blame] | 885 | signal(SIGABRT, &signal_handler); |
| 886 | signal(SIGUSR1, &signal_handler); |
| 887 | signal(SIGPIPE, SIG_IGN); |
| 888 | |
| 889 | while (1) { |
| 890 | bsc_select_main(0); |
| 891 | } |
| 892 | |
Holger Hans Peter Freyther | 9e2c5f5 | 2010-06-15 18:44:42 +0800 | [diff] [blame] | 893 | return 0; |
| 894 | } |