Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 1 | /* A Media Gateway Control Protocol Media Gateway: RFC 3435 */ |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 2 | /* The main method to drive it as a standalone process */ |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 3 | |
| 4 | /* |
| 5 | * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org> |
Holger Hans Peter Freyther | 276b1df | 2010-02-03 18:10:07 +0100 | [diff] [blame] | 6 | * (C) 2009 by On-Waves |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [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 | |
| 25 | #include <ctype.h> |
| 26 | #include <stdio.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <string.h> |
| 29 | #include <time.h> |
| 30 | #include <limits.h> |
| 31 | #include <unistd.h> |
| 32 | |
| 33 | #include <sys/socket.h> |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 34 | |
| 35 | #include <openbsc/debug.h> |
Harald Welte | f4625b1 | 2010-02-20 16:24:02 +0100 | [diff] [blame] | 36 | #include <osmocore/msgb.h> |
| 37 | #include <osmocore/talloc.h> |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 38 | #include <openbsc/gsm_data.h> |
Harald Welte | f4625b1 | 2010-02-20 16:24:02 +0100 | [diff] [blame] | 39 | #include <osmocore/select.h> |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 40 | #include <openbsc/mgcp.h> |
Holger Hans Peter Freyther | 3b812d0 | 2010-03-31 07:01:35 +0200 | [diff] [blame] | 41 | #include <openbsc/mgcp_internal.h> |
Harald Welte | bd9591f | 2010-05-19 19:45:32 +0200 | [diff] [blame] | 42 | #include <osmocom/vty//telnet_interface.h> |
Holger Hans Peter Freyther | 0dace8e | 2010-04-06 12:00:43 +0200 | [diff] [blame] | 43 | #include <openbsc/vty.h> |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 44 | |
Harald Welte | bd9591f | 2010-05-19 19:45:32 +0200 | [diff] [blame] | 45 | #include <osmocom/vty/command.h> |
Holger Hans Peter Freyther | 9856ee2 | 2010-03-30 12:43:53 +0200 | [diff] [blame] | 46 | |
Harald Welte | fa13cad | 2010-03-23 00:09:32 +0800 | [diff] [blame] | 47 | #include "../../bscconfig.h" |
| 48 | |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 49 | /* this is here for the vty... it will never be called */ |
| 50 | void subscr_put() { abort(); } |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 51 | |
| 52 | #define _GNU_SOURCE |
| 53 | #include <getopt.h> |
| 54 | |
| 55 | #warning "Make use of the rtp proxy code" |
| 56 | |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 57 | static struct bsc_fd bfd; |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 58 | static struct mgcp_config *cfg; |
Holger Hans Peter Freyther | 3b812d0 | 2010-03-31 07:01:35 +0200 | [diff] [blame] | 59 | static int reset_endpoints = 0; |
| 60 | |
Holger Hans Peter Freyther | 7113514 | 2010-03-29 08:47:44 +0200 | [diff] [blame] | 61 | const char *openbsc_copyright = |
Harald Welte | fa13cad | 2010-03-23 00:09:32 +0800 | [diff] [blame] | 62 | "Copyright (C) 2009-2010 Holger Freyther and On-Waves\n" |
| 63 | "Contributions by Daniel Willmann, Jan Lübbe,Stefan Schmidt\n" |
| 64 | "Dieter Spaar, Andreas Eversberg, Harald Welte\n\n" |
| 65 | "License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>\n" |
| 66 | "This is free software: you are free to change and redistribute it.\n" |
| 67 | "There is NO WARRANTY, to the extent permitted by law.\n"; |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 68 | |
| 69 | static char *config_file = "mgcp.cfg"; |
| 70 | |
| 71 | /* used by msgb and mgcp */ |
| 72 | void *tall_bsc_ctx = NULL; |
| 73 | |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 74 | static void print_help() |
| 75 | { |
| 76 | printf("Some useful help...\n"); |
| 77 | printf(" -h --help is printing this text.\n"); |
| 78 | printf(" -c --config-file filename The config file to use.\n"); |
| 79 | } |
| 80 | |
| 81 | static void handle_options(int argc, char** argv) |
| 82 | { |
| 83 | while (1) { |
| 84 | int option_index = 0, c; |
| 85 | static struct option long_options[] = { |
| 86 | {"help", 0, 0, 'h'}, |
| 87 | {"config-file", 1, 0, 'c'}, |
Harald Welte | fa13cad | 2010-03-23 00:09:32 +0800 | [diff] [blame] | 88 | {"version", 0, 0, 'V'}, |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 89 | {0, 0, 0, 0}, |
| 90 | }; |
| 91 | |
Harald Welte | fa13cad | 2010-03-23 00:09:32 +0800 | [diff] [blame] | 92 | c = getopt_long(argc, argv, "hc:V", long_options, &option_index); |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 93 | |
| 94 | if (c == -1) |
| 95 | break; |
| 96 | |
| 97 | switch(c) { |
| 98 | case 'h': |
| 99 | print_help(); |
| 100 | exit(0); |
| 101 | break; |
| 102 | case 'c': |
| 103 | config_file = talloc_strdup(tall_bsc_ctx, optarg); |
| 104 | break; |
Harald Welte | fa13cad | 2010-03-23 00:09:32 +0800 | [diff] [blame] | 105 | case 'V': |
Harald Welte | 10c29f6 | 2010-05-16 19:20:24 +0200 | [diff] [blame] | 106 | print_version(1); |
Harald Welte | fa13cad | 2010-03-23 00:09:32 +0800 | [diff] [blame] | 107 | exit(0); |
| 108 | break; |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 109 | default: |
| 110 | /* ignore */ |
| 111 | break; |
| 112 | }; |
| 113 | } |
| 114 | } |
| 115 | |
Holger Hans Peter Freyther | 3b812d0 | 2010-03-31 07:01:35 +0200 | [diff] [blame] | 116 | /* simply remember this */ |
| 117 | static int mgcp_rsip_cb(struct mgcp_config *cfg) |
| 118 | { |
| 119 | reset_endpoints = 1; |
| 120 | |
| 121 | return 0; |
| 122 | } |
| 123 | |
Holger Hans Peter Freyther | 5591363 | 2010-04-22 13:23:05 +0800 | [diff] [blame] | 124 | static int mgcp_change_cb(struct mgcp_config *cfg, int endpoint, int state, int local_rtp) |
| 125 | { |
| 126 | if (state != MGCP_ENDP_MDCX) |
| 127 | return 0; |
| 128 | |
| 129 | mgcp_send_dummy(&cfg->endpoints[endpoint]); |
| 130 | return 0; |
| 131 | } |
| 132 | |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 133 | static int read_call_agent(struct bsc_fd *fd, unsigned int what) |
| 134 | { |
| 135 | struct sockaddr_in addr; |
| 136 | socklen_t slen = sizeof(addr); |
| 137 | struct msgb *msg; |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 138 | struct msgb *resp; |
Holger Hans Peter Freyther | 3b812d0 | 2010-03-31 07:01:35 +0200 | [diff] [blame] | 139 | int i; |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 140 | |
| 141 | msg = (struct msgb *) fd->data; |
| 142 | |
| 143 | /* read one less so we can use it as a \0 */ |
| 144 | int rc = recvfrom(bfd.fd, msg->data, msg->data_len - 1, 0, |
| 145 | (struct sockaddr *) &addr, &slen); |
| 146 | if (rc < 0) { |
| 147 | perror("Gateway failed to read"); |
| 148 | return -1; |
| 149 | } else if (slen > sizeof(addr)) { |
| 150 | fprintf(stderr, "Gateway received message from outerspace: %d %d\n", |
| 151 | slen, sizeof(addr)); |
| 152 | return -1; |
| 153 | } |
| 154 | |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 155 | /* handle message now */ |
| 156 | msg->l2h = msgb_put(msg, rc); |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 157 | resp = mgcp_handle_message(cfg, msg); |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 158 | msgb_reset(msg); |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 159 | |
| 160 | if (resp) { |
| 161 | sendto(bfd.fd, resp->l2h, msgb_l2len(resp), 0, (struct sockaddr *) &addr, sizeof(addr)); |
| 162 | msgb_free(resp); |
| 163 | } |
Holger Hans Peter Freyther | 3b812d0 | 2010-03-31 07:01:35 +0200 | [diff] [blame] | 164 | |
| 165 | if (reset_endpoints) { |
| 166 | LOGP(DMGCP, LOGL_NOTICE, "Asked to reset endpoints.\n"); |
| 167 | reset_endpoints = 0; |
| 168 | |
| 169 | /* is checking in_addr.s_addr == INADDR_LOOPBACK making it more secure? */ |
| 170 | for (i = 1; i < cfg->number_endpoints; ++i) |
| 171 | mgcp_free_endp(&cfg->endpoints[i]); |
| 172 | } |
| 173 | |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 174 | return 0; |
| 175 | } |
| 176 | |
Holger Hans Peter Freyther | 3538c77 | 2010-06-08 16:11:06 +0800 | [diff] [blame] | 177 | extern enum node_type bsc_vty_go_parent(struct vty *vty); |
Harald Welte | 778c4b9 | 2010-05-25 23:31:39 +0200 | [diff] [blame] | 178 | |
| 179 | static struct vty_app_info vty_info = { |
| 180 | .name = "OpenBSC MGCP", |
| 181 | .version = PACKAGE_VERSION, |
| 182 | .go_parent_cb = bsc_vty_go_parent, |
| 183 | }; |
Holger Hans Peter Freyther | 089c7f5 | 2010-01-13 23:36:53 +0100 | [diff] [blame] | 184 | |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 185 | int main(int argc, char** argv) |
| 186 | { |
Holger Hans Peter Freyther | 3adc628 | 2009-11-19 15:03:39 +0100 | [diff] [blame] | 187 | struct gsm_network dummy_network; |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 188 | struct sockaddr_in addr; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 189 | int on = 1, rc; |
Harald Welte | 51d2a59 | 2010-03-26 21:28:59 +0800 | [diff] [blame] | 190 | struct log_target *stderr_target; |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 191 | |
| 192 | tall_bsc_ctx = talloc_named_const(NULL, 1, "mgcp-callagent"); |
Holger Hans Peter Freyther | c8d862e | 2009-12-22 22:32:51 +0100 | [diff] [blame] | 193 | |
Harald Welte | 51d2a59 | 2010-03-26 21:28:59 +0800 | [diff] [blame] | 194 | log_init(&log_info); |
| 195 | stderr_target = log_target_create_stderr(); |
| 196 | log_add_target(stderr_target); |
| 197 | log_set_all_filter(stderr_target, 1); |
Holger Hans Peter Freyther | c8d862e | 2009-12-22 22:32:51 +0100 | [diff] [blame] | 198 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 199 | cfg = mgcp_config_alloc(); |
| 200 | if (!cfg) |
| 201 | return -1; |
| 202 | |
Harald Welte | 778c4b9 | 2010-05-25 23:31:39 +0200 | [diff] [blame] | 203 | vty_info.copyright = openbsc_copyright; |
| 204 | vty_init(&vty_info); |
Harald Welte | 682ee5f | 2010-05-16 22:02:16 +0200 | [diff] [blame] | 205 | logging_vty_add_cmds(); |
Harald Welte | 4015287 | 2010-05-16 20:52:23 +0200 | [diff] [blame] | 206 | mgcp_vty_init(); |
Harald Welte | 10c29f6 | 2010-05-16 19:20:24 +0200 | [diff] [blame] | 207 | |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 208 | handle_options(argc, argv); |
| 209 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 210 | rc = mgcp_parse_config(config_file, cfg); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 211 | if (rc < 0) |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 212 | return rc; |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 213 | |
Harald Welte | 4015287 | 2010-05-16 20:52:23 +0200 | [diff] [blame] | 214 | rc = telnet_init(tall_bsc_ctx, &dummy_network, 4243); |
| 215 | if (rc < 0) |
| 216 | return rc; |
| 217 | |
Holger Hans Peter Freyther | 3b812d0 | 2010-03-31 07:01:35 +0200 | [diff] [blame] | 218 | /* set some callbacks */ |
| 219 | cfg->reset_cb = mgcp_rsip_cb; |
Holger Hans Peter Freyther | 5591363 | 2010-04-22 13:23:05 +0800 | [diff] [blame] | 220 | cfg->change_cb = mgcp_change_cb; |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 221 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 222 | /* we need to bind a socket */ |
| 223 | if (rc == 0) { |
Holger Hans Peter Freyther | c8b831a | 2010-01-05 12:21:36 +0100 | [diff] [blame] | 224 | bfd.when = BSC_FD_READ; |
| 225 | bfd.cb = read_call_agent; |
| 226 | bfd.fd = socket(AF_INET, SOCK_DGRAM, 0); |
| 227 | if (bfd.fd < 0) { |
| 228 | perror("Gateway failed to listen"); |
| 229 | return -1; |
| 230 | } |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 231 | |
Holger Hans Peter Freyther | c8b831a | 2010-01-05 12:21:36 +0100 | [diff] [blame] | 232 | setsockopt(bfd.fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 233 | |
Holger Hans Peter Freyther | c8b831a | 2010-01-05 12:21:36 +0100 | [diff] [blame] | 234 | memset(&addr, 0, sizeof(addr)); |
| 235 | addr.sin_family = AF_INET; |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 236 | addr.sin_port = htons(cfg->source_port); |
| 237 | inet_aton(cfg->source_addr, &addr.sin_addr); |
Holger Hans Peter Freyther | c8b831a | 2010-01-05 12:21:36 +0100 | [diff] [blame] | 238 | |
| 239 | if (bind(bfd.fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { |
| 240 | perror("Gateway failed to bind"); |
| 241 | return -1; |
| 242 | } |
| 243 | |
| 244 | bfd.data = msgb_alloc(4096, "mgcp-msg"); |
| 245 | if (!bfd.data) { |
| 246 | fprintf(stderr, "Gateway memory error.\n"); |
| 247 | return -1; |
| 248 | } |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 249 | |
| 250 | |
Holger Hans Peter Freyther | c8b831a | 2010-01-05 12:21:36 +0100 | [diff] [blame] | 251 | if (bsc_register_fd(&bfd) != 0) { |
Holger Hans Peter Freyther | e08796b | 2010-03-31 06:16:45 +0200 | [diff] [blame] | 252 | LOGP(DMGCP, LOGL_FATAL, "Failed to register the fd\n"); |
Holger Hans Peter Freyther | c8b831a | 2010-01-05 12:21:36 +0100 | [diff] [blame] | 253 | return -1; |
| 254 | } |
Holger Hans Peter Freyther | a5a1dde | 2010-01-05 12:25:25 +0100 | [diff] [blame] | 255 | |
Holger Hans Peter Freyther | e08796b | 2010-03-31 06:16:45 +0200 | [diff] [blame] | 256 | LOGP(DMGCP, LOGL_NOTICE, "Configured for MGCP.\n"); |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 257 | } |
| 258 | |
| 259 | /* initialisation */ |
| 260 | srand(time(NULL)); |
| 261 | |
Holger Hans Peter Freyther | 9a26b7c | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 262 | /* main loop */ |
| 263 | while (1) { |
| 264 | bsc_select_main(0); |
| 265 | } |
| 266 | |
| 267 | |
| 268 | return 0; |
| 269 | } |