Holger Hans Peter Freyther | a93b83b | 2011-01-17 15:21:06 +0100 | [diff] [blame] | 1 | /* Relay UDT/all SCCP messages */ |
| 2 | /* |
| 3 | * (C) 2010-2011 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 4 | * (C) 2010-2011 by On-Waves |
| 5 | * All Rights Reserved |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <mtp_data.h> |
| 24 | #include <mtp_level3.h> |
| 25 | #include <mtp_pcap.h> |
| 26 | #include <thread.h> |
| 27 | #include <bsc_data.h> |
| 28 | #include <snmp_mtp.h> |
| 29 | #include <cellmgr_debug.h> |
Holger Hans Peter Freyther | 9cf11bc | 2011-01-17 15:53:06 +0100 | [diff] [blame] | 30 | #include <sctp_m2ua.h> |
Holger Hans Peter Freyther | a93b83b | 2011-01-17 15:21:06 +0100 | [diff] [blame] | 31 | |
Holger Hans Peter Freyther | 0292127 | 2011-01-22 23:05:03 +0100 | [diff] [blame] | 32 | #include <osmocom/m2ua/m2ua_msg.h> |
| 33 | |
Holger Hans Peter Freyther | a93b83b | 2011-01-17 15:21:06 +0100 | [diff] [blame] | 34 | #include <osmocore/talloc.h> |
| 35 | |
| 36 | #include <osmocom/vty/vty.h> |
| 37 | #include <osmocom/vty/telnet_interface.h> |
| 38 | |
| 39 | #include <sys/stat.h> |
| 40 | #include <sys/types.h> |
| 41 | |
| 42 | #include <fcntl.h> |
| 43 | #include <signal.h> |
| 44 | #include <stdio.h> |
| 45 | #include <stdlib.h> |
| 46 | #include <string.h> |
| 47 | #include <assert.h> |
| 48 | #include <unistd.h> |
| 49 | |
| 50 | #ifndef _GNU_SOURCE |
| 51 | #define _GNU_SOURCE |
| 52 | #endif |
| 53 | #include <getopt.h> |
| 54 | |
| 55 | #undef PACKAGE_NAME |
| 56 | #undef PACKAGE_VERSION |
| 57 | #undef PACKAGE_BUGREPORT |
| 58 | #undef PACKAGE_TARNAME |
| 59 | #undef PACKAGE_STRING |
| 60 | #include <cellmgr_config.h> |
| 61 | |
| 62 | static struct log_target *stderr_target; |
| 63 | |
| 64 | static char *config = "osmo_stp.cfg"; |
| 65 | |
| 66 | struct bsc_data bsc; |
| 67 | extern void cell_vty_init(void); |
| 68 | |
| 69 | /* |
| 70 | * methods called from the MTP Level3 part |
| 71 | */ |
| 72 | void mtp_link_set_forward_sccp(struct mtp_link_set *link, struct msgb *_msg, int sls) |
| 73 | { |
Holger Hans Peter Freyther | 9cf11bc | 2011-01-17 15:53:06 +0100 | [diff] [blame] | 74 | struct mtp_link_set *target; |
| 75 | |
| 76 | target = bsc.m2ua_set == link ? bsc.link_set : bsc.m2ua_set; |
| 77 | mtp_link_set_submit_sccp_data(target, sls, _msg->l2h, msgb_l2len(_msg)); |
Holger Hans Peter Freyther | a93b83b | 2011-01-17 15:21:06 +0100 | [diff] [blame] | 78 | } |
| 79 | |
Holger Hans Peter Freyther | 1b6901e | 2011-01-17 16:13:28 +0100 | [diff] [blame] | 80 | void mtp_link_set_forward_isup(struct mtp_link_set *set, struct msgb *msg, int sls) |
| 81 | { |
| 82 | struct mtp_link_set *target; |
| 83 | |
| 84 | target = bsc.m2ua_set == set ? bsc.link_set : bsc.m2ua_set; |
| 85 | mtp_link_set_submit_isup_data(target, sls, msg->l3h, msgb_l3len(msg)); |
| 86 | } |
| 87 | |
Holger Hans Peter Freyther | a93b83b | 2011-01-17 15:21:06 +0100 | [diff] [blame] | 88 | void mtp_linkset_down(struct mtp_link_set *set) |
| 89 | { |
| 90 | set->available = 0; |
| 91 | mtp_link_set_stop(set); |
| 92 | } |
| 93 | |
| 94 | void mtp_linkset_up(struct mtp_link_set *set) |
| 95 | { |
| 96 | set->available = 1; |
| 97 | mtp_link_set_reset(set); |
| 98 | } |
| 99 | |
| 100 | static void print_usage() |
| 101 | { |
| 102 | printf("Usage: osmo-stp\n"); |
| 103 | } |
| 104 | |
| 105 | static void sigint() |
| 106 | { |
| 107 | static pthread_mutex_t exit_mutex = PTHREAD_MUTEX_INITIALIZER; |
| 108 | static int handled = 0; |
| 109 | |
| 110 | /* failed to lock */ |
| 111 | if (pthread_mutex_trylock(&exit_mutex) != 0) |
| 112 | return; |
| 113 | if (handled) |
| 114 | goto out; |
| 115 | |
| 116 | printf("Terminating.\n"); |
| 117 | handled = 1; |
| 118 | if (bsc.setup) |
| 119 | link_shutdown_all(bsc.link_set); |
| 120 | exit(0); |
| 121 | |
| 122 | out: |
| 123 | pthread_mutex_unlock(&exit_mutex); |
| 124 | } |
| 125 | |
| 126 | static void print_help() |
| 127 | { |
| 128 | printf(" Some useful help...\n"); |
| 129 | printf(" -h --help this text\n"); |
| 130 | printf(" -c --config=CFG The config file to use.\n"); |
| 131 | printf(" -p --pcap=FILE. Write MSUs to the PCAP file.\n"); |
| 132 | printf(" -c --once. Send the SLTM msg only once.\n"); |
| 133 | printf(" -v --version. Print the version number\n"); |
| 134 | } |
| 135 | |
| 136 | static void handle_options(int argc, char **argv) |
| 137 | { |
| 138 | while (1) { |
| 139 | int option_index = 0, c; |
| 140 | static struct option long_options[] = { |
| 141 | {"help", 0, 0, 'h'}, |
| 142 | {"config", 1, 0, 'c'}, |
| 143 | {"pcap", 1, 0, 'p'}, |
| 144 | {"version", 0, 0, 0}, |
| 145 | {0, 0, 0, 0}, |
| 146 | }; |
| 147 | |
| 148 | c = getopt_long(argc, argv, "hc:p:v", |
| 149 | long_options, &option_index); |
| 150 | if (c == -1) |
| 151 | break; |
| 152 | |
| 153 | switch (c) { |
| 154 | case 'h': |
| 155 | print_usage(); |
| 156 | print_help(); |
| 157 | exit(0); |
| 158 | case 'p': |
| 159 | if (bsc.pcap_fd >= 0) |
| 160 | close(bsc.pcap_fd); |
| 161 | bsc.pcap_fd = open(optarg, O_WRONLY | O_TRUNC | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP| S_IROTH); |
| 162 | if (bsc.pcap_fd < 0) { |
| 163 | fprintf(stderr, "Failed to open PCAP file.\n"); |
| 164 | exit(0); |
| 165 | } |
| 166 | mtp_pcap_write_header(bsc.pcap_fd); |
| 167 | break; |
| 168 | case 'c': |
| 169 | config = optarg; |
| 170 | break; |
| 171 | case 'v': |
| 172 | printf("This is %s version %s.\n", PACKAGE, VERSION); |
| 173 | exit(0); |
| 174 | break; |
| 175 | default: |
| 176 | fprintf(stderr, "Unknown option.\n"); |
| 177 | break; |
| 178 | } |
| 179 | } |
| 180 | } |
| 181 | |
Holger Hans Peter Freyther | 0452f22 | 2011-02-03 13:35:42 +0100 | [diff] [blame] | 182 | static struct mtp_link_set *find_link_set(struct bsc_data *bsc, |
| 183 | int len, const char *buf) |
| 184 | { |
| 185 | if (strncmp(buf, "mtp", len) == 0) |
| 186 | return bsc->link_set; |
| 187 | else if (strncmp(buf, "m2ua", len) == 0) |
| 188 | return bsc->m2ua_set; |
| 189 | return NULL; |
| 190 | } |
| 191 | |
| 192 | static int inject_read_cb(struct bsc_fd *fd, unsigned int what) |
| 193 | { |
| 194 | struct msgb *msg; |
| 195 | struct m2ua_msg_part *data, *link; |
| 196 | struct bsc_data *bsc; |
| 197 | struct m2ua_msg *m2ua; |
| 198 | struct mtp_link_set *out_set; |
| 199 | uint8_t buf[4096]; |
| 200 | |
| 201 | bsc = fd->data; |
| 202 | |
| 203 | int rc = read(fd->fd, buf, sizeof(buf)); |
| 204 | if (rc <= 0) { |
| 205 | LOGP(DINP, LOGL_ERROR, "Failed to read from the console.\n"); |
| 206 | return -1; |
| 207 | } |
| 208 | |
Holger Hans Peter Freyther | ee63d7d | 2011-02-10 12:39:05 +0100 | [diff] [blame^] | 209 | if (!bsc->allow_inject) { |
| 210 | LOGP(DINP, LOGL_ERROR, "Injecting messages is not allowed.\n"); |
| 211 | return -1; |
| 212 | } |
| 213 | |
Holger Hans Peter Freyther | 0452f22 | 2011-02-03 13:35:42 +0100 | [diff] [blame] | 214 | m2ua = m2ua_from_msg(rc, buf); |
| 215 | if (!m2ua) { |
| 216 | LOGP(DINP, LOGL_ERROR, "Failed to parse M2UA.\n"); |
| 217 | return -1; |
| 218 | } |
| 219 | |
| 220 | if (m2ua->hdr.msg_class == M2UA_CLS_MAUP && m2ua->hdr.msg_type == M2UA_MAUP_DATA) { |
| 221 | data = m2ua_msg_find_tag(m2ua, M2UA_TAG_DATA); |
| 222 | if (!data) { |
| 223 | LOGP(DINP, LOGL_ERROR, "MAUP Data without data.\n"); |
| 224 | goto exit; |
| 225 | } |
| 226 | |
| 227 | if (data->len > 2048) { |
| 228 | LOGP(DINP, LOGL_ERROR, "Data is too big for this configuration.\n"); |
| 229 | goto exit; |
| 230 | } |
| 231 | |
| 232 | link = m2ua_msg_find_tag(m2ua, MUA_TAG_IDENT_TEXT); |
| 233 | if (!link) { |
| 234 | LOGP(DINP, LOGL_ERROR, "Interface Identifier Text is mandantory.\n"); |
| 235 | goto exit; |
| 236 | } |
| 237 | |
| 238 | if (link->len > 255) { |
| 239 | LOGP(DINP, LOGL_ERROR, "Spec violation. Ident text should be shorter than 255.\n"); |
| 240 | goto exit; |
| 241 | } |
| 242 | |
| 243 | out_set = find_link_set(bsc, link->len, (const char *) link->dat); |
| 244 | if (!out_set) { |
| 245 | LOGP(DINP, LOGL_ERROR, "Identified linkset does not exist.\n"); |
| 246 | goto exit; |
| 247 | } |
| 248 | |
| 249 | msg = msgb_alloc(2048, "inject-data"); |
| 250 | if (!msg) { |
| 251 | LOGP(DINP, LOGL_ERROR, "Failed to allocate storage.\n"); |
| 252 | goto exit; |
| 253 | } |
| 254 | |
| 255 | msg->l2h = msgb_put(msg, data->len); |
| 256 | memcpy(msg->l2h, data->dat, data->len); |
| 257 | |
| 258 | /* we are diretcly going to the output. no checking of anything */ |
| 259 | if (mtp_link_set_send(out_set, msg) != 0) { |
| 260 | LOGP(DINP, LOGL_ERROR, "Failed to send message.\n"); |
| 261 | msgb_free(msg); |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | exit: |
| 266 | m2ua_msg_free(m2ua); |
| 267 | return 0; |
| 268 | } |
| 269 | |
| 270 | static int inject_init(struct bsc_data *bsc) |
| 271 | { |
| 272 | int fd; |
| 273 | struct sockaddr_in addr; |
| 274 | |
| 275 | fd = socket(PF_INET, SOCK_DGRAM, 0); |
| 276 | if (fd < 0) |
| 277 | return -1; |
| 278 | |
| 279 | memset(&addr, 0, sizeof(addr)); |
| 280 | addr.sin_family = AF_INET; |
| 281 | addr.sin_port = htons(5001); |
| 282 | |
| 283 | if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) != 0) { |
| 284 | LOGP(DINP, LOGL_ERROR, "Failed to bind to port 5001.\n"); |
| 285 | close(fd); |
| 286 | return -1; |
| 287 | } |
| 288 | |
| 289 | bsc->inject_fd.fd = fd; |
| 290 | bsc->inject_fd.when = BSC_FD_READ; |
| 291 | bsc->inject_fd.cb = inject_read_cb; |
| 292 | bsc->inject_fd.data = bsc; |
| 293 | |
| 294 | if (bsc_register_fd(&bsc->inject_fd) != 0) { |
| 295 | LOGP(DINP, LOGL_ERROR, "Failed to register.\n"); |
| 296 | close(fd); |
| 297 | return -1; |
| 298 | } |
| 299 | |
| 300 | return 0; |
| 301 | } |
| 302 | |
Holger Hans Peter Freyther | a93b83b | 2011-01-17 15:21:06 +0100 | [diff] [blame] | 303 | int main(int argc, char **argv) |
| 304 | { |
| 305 | int rc; |
Holger Hans Peter Freyther | 9cf11bc | 2011-01-17 15:53:06 +0100 | [diff] [blame] | 306 | struct mtp_link *data; |
| 307 | struct mtp_m2ua_link *lnk; |
Holger Hans Peter Freyther | a93b83b | 2011-01-17 15:21:06 +0100 | [diff] [blame] | 308 | INIT_LLIST_HEAD(&bsc.sccp_connections); |
| 309 | |
Holger Hans Peter Freyther | a310e53 | 2011-01-22 16:34:16 +0100 | [diff] [blame] | 310 | bsc.app = APP_STP; |
Holger Hans Peter Freyther | a93b83b | 2011-01-17 15:21:06 +0100 | [diff] [blame] | 311 | bsc.dpc = 1; |
| 312 | bsc.opc = 0; |
| 313 | bsc.sccp_opc = -1; |
Holger Hans Peter Freyther | d8a73e2 | 2011-01-17 22:37:11 +0100 | [diff] [blame] | 314 | bsc.isup_opc = -1; |
Holger Hans Peter Freyther | a93b83b | 2011-01-17 15:21:06 +0100 | [diff] [blame] | 315 | bsc.udp_port = 3456; |
| 316 | bsc.udp_ip = NULL; |
| 317 | bsc.src_port = 1313; |
| 318 | bsc.ni_ni = MTP_NI_NATION_NET; |
| 319 | bsc.ni_spare = 0; |
Holger Hans Peter Freyther | c6bfa27 | 2011-01-22 17:06:34 +0100 | [diff] [blame] | 320 | bsc.udp_nr_links = 1; |
Holger Hans Peter Freyther | a93b83b | 2011-01-17 15:21:06 +0100 | [diff] [blame] | 321 | |
| 322 | mtp_link_set_init(); |
| 323 | thread_init(); |
| 324 | |
| 325 | log_init(&log_info); |
| 326 | stderr_target = log_target_create_stderr(); |
| 327 | log_add_target(stderr_target); |
| 328 | |
| 329 | /* enable filters */ |
| 330 | log_set_all_filter(stderr_target, 1); |
| 331 | log_set_category_filter(stderr_target, DINP, 1, LOGL_INFO); |
| 332 | log_set_category_filter(stderr_target, DSCCP, 1, LOGL_INFO); |
| 333 | log_set_category_filter(stderr_target, DMSC, 1, LOGL_INFO); |
| 334 | log_set_category_filter(stderr_target, DMGCP, 1, LOGL_INFO); |
| 335 | log_set_print_timestamp(stderr_target, 1); |
| 336 | log_set_use_color(stderr_target, 0); |
| 337 | |
| 338 | sccp_set_log_area(DSCCP); |
Holger Hans Peter Freyther | 0292127 | 2011-01-22 23:05:03 +0100 | [diff] [blame] | 339 | m2ua_set_log_area(DM2UA); |
Holger Hans Peter Freyther | a93b83b | 2011-01-17 15:21:06 +0100 | [diff] [blame] | 340 | |
| 341 | bsc.setup = 0; |
| 342 | bsc.msc_address = "127.0.0.1"; |
| 343 | bsc.pcap_fd = -1; |
| 344 | bsc.udp_reset_timeout = 180; |
| 345 | bsc.ping_time = 20; |
| 346 | bsc.pong_time = 5; |
| 347 | bsc.msc_time = 20; |
| 348 | bsc.forward_only = 1; |
| 349 | |
| 350 | handle_options(argc, argv); |
| 351 | |
| 352 | signal(SIGPIPE, SIG_IGN); |
| 353 | signal(SIGINT, sigint); |
| 354 | srand(time(NULL)); |
| 355 | |
| 356 | cell_vty_init(); |
| 357 | if (vty_read_config_file(config, NULL) < 0) { |
| 358 | fprintf(stderr, "Failed to read the VTY config.\n"); |
| 359 | return -1; |
| 360 | } |
| 361 | |
| 362 | rc = telnet_init(NULL, NULL, 4242); |
| 363 | if (rc < 0) |
| 364 | return rc; |
| 365 | |
Holger Hans Peter Freyther | 0452f22 | 2011-02-03 13:35:42 +0100 | [diff] [blame] | 366 | if (inject_init(&bsc) != 0) { |
| 367 | LOGP(DINP, LOGL_NOTICE, "Failed to initialize inject interface.\n"); |
| 368 | return -1; |
| 369 | } |
| 370 | |
Holger Hans Peter Freyther | a93b83b | 2011-01-17 15:21:06 +0100 | [diff] [blame] | 371 | if (link_init(&bsc) != 0) |
| 372 | return -1; |
| 373 | |
Holger Hans Peter Freyther | 9cf11bc | 2011-01-17 15:53:06 +0100 | [diff] [blame] | 374 | bsc.m2ua_set = mtp_link_set_alloc(); |
| 375 | bsc.m2ua_set->dpc = 92; |
| 376 | bsc.m2ua_set->opc = 9; |
| 377 | bsc.m2ua_set->sccp_opc = 9; |
Holger Hans Peter Freyther | d8a73e2 | 2011-01-17 22:37:11 +0100 | [diff] [blame] | 378 | bsc.m2ua_set->isup_opc = 9; |
Holger Hans Peter Freyther | 9cf11bc | 2011-01-17 15:53:06 +0100 | [diff] [blame] | 379 | bsc.m2ua_set->ni = 3; |
| 380 | bsc.m2ua_set->bsc = &bsc; |
Holger Hans Peter Freyther | f6375b4 | 2011-01-22 21:01:23 +0100 | [diff] [blame] | 381 | bsc.m2ua_set->pcap_fd = bsc.pcap_fd; |
Holger Hans Peter Freyther | 38d936a | 2011-01-26 12:41:42 +0100 | [diff] [blame] | 382 | bsc.m2ua_set->name = talloc_strdup(bsc.m2ua_set, "M2UA"); |
Holger Hans Peter Freyther | 9cf11bc | 2011-01-17 15:53:06 +0100 | [diff] [blame] | 383 | |
Holger Hans Peter Freyther | efbd8c2 | 2011-01-17 20:21:45 +0100 | [diff] [blame] | 384 | /* for both links we want to have all isup messages */ |
Holger Hans Peter Freyther | f603f28 | 2011-01-30 00:24:15 +0100 | [diff] [blame] | 385 | if (bsc.isup_pass) { |
| 386 | LOGP(DINP, LOGL_NOTICE, "Going to pass through all ISUP messages.\n"); |
| 387 | bsc.m2ua_set->pass_all_isup = 1; |
| 388 | bsc.link_set->pass_all_isup = 1; |
| 389 | } |
Holger Hans Peter Freyther | efbd8c2 | 2011-01-17 20:21:45 +0100 | [diff] [blame] | 390 | |
Holger Hans Peter Freyther | 9cf11bc | 2011-01-17 15:53:06 +0100 | [diff] [blame] | 391 | lnk = sctp_m2ua_transp_create("0.0.0.0", 2904); |
Holger Hans Peter Freyther | f6375b4 | 2011-01-22 21:01:23 +0100 | [diff] [blame] | 392 | lnk->base.pcap_fd = -1; |
Holger Hans Peter Freyther | 9cf11bc | 2011-01-17 15:53:06 +0100 | [diff] [blame] | 393 | mtp_link_set_add_link(bsc.m2ua_set, (struct mtp_link *) lnk); |
| 394 | |
| 395 | llist_for_each_entry(data, &bsc.m2ua_set->links, entry) |
| 396 | data->start(data); |
| 397 | |
Holger Hans Peter Freyther | a93b83b | 2011-01-17 15:21:06 +0100 | [diff] [blame] | 398 | while (1) { |
| 399 | bsc_select_main(0); |
| 400 | } |
| 401 | |
| 402 | return 0; |
| 403 | } |
| 404 | |
| 405 | /* dummy for links */ |
| 406 | int msc_init(struct bsc_data *data, int dummy) |
| 407 | { |
| 408 | return 0; |
| 409 | } |
| 410 | |