Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
Pau Espin Pedrol | afa22c6 | 2022-04-12 11:53:16 +0200 | [diff] [blame^] | 2 | #define _GNU_SOURCE |
| 3 | #include <getopt.h> |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 4 | #include <unistd.h> |
| 5 | #include <stdint.h> |
| 6 | #include <stdbool.h> |
| 7 | #include <stdlib.h> |
| 8 | #include <string.h> |
| 9 | #include <stdio.h> |
| 10 | #include <assert.h> |
| 11 | #include <sys/types.h> |
Harald Welte | f9bb177 | 2020-04-21 22:46:34 +0200 | [diff] [blame] | 12 | #include <sys/wait.h> |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 13 | #include <sys/signalfd.h> |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 14 | #include <signal.h> |
| 15 | #include <errno.h> |
| 16 | |
| 17 | #include <pthread.h> |
| 18 | |
| 19 | #include <osmocom/core/linuxlist.h> |
| 20 | #include <osmocom/core/talloc.h> |
| 21 | #include <osmocom/core/select.h> |
| 22 | #include <osmocom/core/application.h> |
| 23 | #include <osmocom/core/logging.h> |
| 24 | #include <osmocom/core/stats.h> |
| 25 | #include <osmocom/core/rate_ctr.h> |
| 26 | #include <osmocom/core/socket.h> |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 27 | #include <osmocom/core/exec.h> |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 28 | #include <osmocom/vty/telnet_interface.h> |
| 29 | #include <osmocom/vty/logging.h> |
| 30 | #include <osmocom/vty/stats.h> |
| 31 | #include <osmocom/vty/ports.h> |
| 32 | #include <osmocom/vty/command.h> |
| 33 | #include <osmocom/vty/misc.h> |
| 34 | |
| 35 | #include <osmocom/netif/stream.h> |
| 36 | #include <netinet/sctp.h> |
| 37 | |
| 38 | #include <jansson.h> |
| 39 | |
| 40 | #include "internal.h" |
| 41 | #include "netns.h" |
| 42 | #include "gtp.h" |
| 43 | |
| 44 | /*********************************************************************** |
| 45 | * Client (Contol/User Plane Separation) Socket |
| 46 | ***********************************************************************/ |
| 47 | |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 48 | #include <pwd.h> |
| 49 | |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 50 | #define CUPS_MSGB_SIZE 1024 |
| 51 | |
| 52 | #define LOGCC(cc, lvl, fmt, args ...) \ |
| 53 | LOGP(DUECUPS, lvl, "%s: " fmt, (cc)->sockname, ## args) |
| 54 | |
| 55 | struct cups_client { |
| 56 | /* member in daemon->cups_clients */ |
| 57 | struct llist_head list; |
| 58 | /* back-pointer to daemon */ |
| 59 | struct gtp_daemon *d; |
| 60 | /* client socket */ |
| 61 | struct osmo_stream_srv *srv; |
| 62 | char sockname[OSMO_SOCK_NAME_MAXLEN]; |
Pau Espin Pedrol | a459b5c | 2022-04-11 17:00:36 +0200 | [diff] [blame] | 63 | bool reset_all_state_res_pending; |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 64 | }; |
| 65 | |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 66 | struct subprocess { |
| 67 | /* member in daemon->cups_clients */ |
| 68 | struct llist_head list; |
| 69 | /* pointer to the client that started us */ |
| 70 | struct cups_client *cups_client; |
| 71 | /* PID of the process */ |
| 72 | pid_t pid; |
| 73 | }; |
| 74 | |
Harald Welte | 0174469 | 2020-04-18 21:00:13 +0200 | [diff] [blame] | 75 | /* kill the specified subprocess and forget about it */ |
| 76 | static void subprocess_destroy(struct subprocess *p, int signal) |
| 77 | { |
Pau Espin Pedrol | 687eafa | 2022-04-11 16:17:05 +0200 | [diff] [blame] | 78 | LOGCC(p->cups_client, LOGL_DEBUG, "Kill subprocess pid %llu with signal %u\n", |
| 79 | (unsigned long long)p->pid, signal); |
Harald Welte | 0174469 | 2020-04-18 21:00:13 +0200 | [diff] [blame] | 80 | kill(p->pid, signal); |
| 81 | llist_del(&p->list); |
| 82 | talloc_free(p); |
| 83 | } |
| 84 | |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 85 | /* Send JSON to a given client/connection */ |
| 86 | static int cups_client_tx_json(struct cups_client *cc, json_t *jtx) |
| 87 | { |
| 88 | struct msgb *msg = msgb_alloc(CUPS_MSGB_SIZE, "Tx JSON"); |
| 89 | char *json_str = json_dumps(jtx, JSON_SORT_KEYS); |
| 90 | char *out; |
| 91 | int json_strlen; |
| 92 | |
| 93 | json_decref(jtx); |
| 94 | if (!json_str) { |
| 95 | LOGCC(cc, LOGL_ERROR, "Error encoding JSON\n"); |
| 96 | return 0; |
| 97 | } |
| 98 | json_strlen = strlen(json_str); |
| 99 | |
| 100 | LOGCC(cc, LOGL_DEBUG, "JSON Tx '%s'\n", json_str); |
| 101 | |
| 102 | if (json_strlen > msgb_tailroom(msg)) { |
| 103 | LOGCC(cc, LOGL_ERROR, "Not enough room for JSON in msgb\n"); |
| 104 | free(json_str); |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | out = (char *)msgb_put(msg, json_strlen); |
| 109 | memcpy(out, json_str, json_strlen); |
| 110 | free(json_str); |
| 111 | osmo_stream_srv_send(cc->srv, msg); |
| 112 | |
| 113 | return 0; |
| 114 | } |
| 115 | |
| 116 | static json_t *gen_uecups_result(const char *name, const char *res) |
| 117 | { |
| 118 | json_t *jres = json_object(); |
| 119 | json_t *jret = json_object(); |
| 120 | |
| 121 | json_object_set_new(jres, "result", json_string(res)); |
| 122 | json_object_set_new(jret, name, jres); |
| 123 | |
| 124 | return jret; |
| 125 | } |
| 126 | |
| 127 | static int parse_ep(struct sockaddr_storage *out, json_t *in) |
| 128 | { |
| 129 | json_t *jaddr_type, *jport, *jip; |
| 130 | const char *addr_type, *ip; |
| 131 | uint8_t buf[16]; |
| 132 | |
| 133 | /* {"addr_type":"IPV4","ip":"31323334","Port":2152} */ |
| 134 | |
| 135 | if (!json_is_object(in)) |
| 136 | return -EINVAL; |
| 137 | |
| 138 | jaddr_type = json_object_get(in, "addr_type"); |
| 139 | jport = json_object_get(in, "Port"); |
| 140 | jip = json_object_get(in, "ip"); |
| 141 | |
| 142 | if (!jaddr_type || !jport || !jip) |
| 143 | return -EINVAL; |
| 144 | |
| 145 | if (!json_is_string(jaddr_type) || !json_is_integer(jport) || !json_is_string(jip)) |
| 146 | return -EINVAL; |
| 147 | |
| 148 | addr_type = json_string_value(jaddr_type); |
| 149 | ip = json_string_value(jip); |
| 150 | |
| 151 | memset(out, 0, sizeof(*out)); |
| 152 | |
| 153 | if (!strcmp(addr_type, "IPV4")) { |
| 154 | struct sockaddr_in *sin = (struct sockaddr_in *) out; |
| 155 | if (osmo_hexparse(ip, buf, sizeof(buf)) != 4) |
| 156 | return -EINVAL; |
| 157 | memcpy(&sin->sin_addr, buf, 4); |
| 158 | sin->sin_family = AF_INET; |
| 159 | sin->sin_port = htons(json_integer_value(jport)); |
| 160 | } else if (!strcmp(addr_type, "IPV6")) { |
| 161 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) out; |
| 162 | if (osmo_hexparse(ip, buf, sizeof(buf)) != 16) |
| 163 | return -EINVAL; |
| 164 | memcpy(&sin6->sin6_addr, buf, 16); |
| 165 | sin6->sin6_family = AF_INET6; |
| 166 | sin6->sin6_port = htons(json_integer_value(jport)); |
| 167 | } else |
| 168 | return -EINVAL; |
| 169 | |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | static int parse_eua(struct sockaddr_storage *out, json_t *jip, json_t *jaddr_type) |
| 174 | { |
| 175 | const char *addr_type, *ip; |
| 176 | uint8_t buf[16]; |
| 177 | |
| 178 | if (!json_is_string(jip) || !json_is_string(jaddr_type)) |
| 179 | return -EINVAL; |
| 180 | |
| 181 | addr_type = json_string_value(jaddr_type); |
| 182 | ip = json_string_value(jip); |
| 183 | |
| 184 | memset(out, 0, sizeof(*out)); |
| 185 | |
| 186 | if (!strcmp(addr_type, "IPV4")) { |
| 187 | struct sockaddr_in *sin = (struct sockaddr_in *) out; |
| 188 | if (osmo_hexparse(ip, buf, sizeof(buf)) != 4) |
| 189 | return -EINVAL; |
| 190 | memcpy(&sin->sin_addr, buf, 4); |
| 191 | sin->sin_family = AF_INET; |
| 192 | } else if (!strcmp(addr_type, "IPV6")) { |
| 193 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) out; |
| 194 | if (osmo_hexparse(ip, buf, sizeof(buf)) != 16) |
| 195 | return -EINVAL; |
| 196 | memcpy(&sin6->sin6_addr, buf, 16); |
| 197 | sin6->sin6_family = AF_INET6; |
| 198 | } else |
| 199 | return -EINVAL; |
| 200 | |
| 201 | return 0; |
| 202 | } |
| 203 | |
| 204 | |
| 205 | static int parse_create_tun(struct gtp_tunnel_params *out, json_t *ctun) |
| 206 | { |
| 207 | json_t *jlocal_gtp_ep, *jremote_gtp_ep; |
| 208 | json_t *jrx_teid, *jtx_teid; |
| 209 | json_t *jtun_dev_name, *jtun_netns_name; |
| 210 | json_t *juser_addr, *juser_addr_type; |
| 211 | int rc; |
| 212 | |
| 213 | /* '{"create_tun":{"tx_teid":1234,"rx_teid":5678,"user_addr_type":"IPV4","user_addr":"21222324","local_gtp_ep":{"addr_type":"IPV4","ip":"31323334","Port":2152},"remote_gtp_ep":{"addr_type":"IPV4","ip":"41424344","Port":2152},"tun_dev_name":"tun23","tun_netns_name":"foo"}}' */ |
| 214 | |
| 215 | if (!json_is_object(ctun)) |
| 216 | return -EINVAL; |
| 217 | |
| 218 | /* mandatory IEs */ |
| 219 | jlocal_gtp_ep = json_object_get(ctun, "local_gtp_ep"); |
| 220 | jremote_gtp_ep = json_object_get(ctun, "remote_gtp_ep"); |
| 221 | jrx_teid = json_object_get(ctun, "rx_teid"); |
| 222 | jtx_teid = json_object_get(ctun, "tx_teid"); |
| 223 | jtun_dev_name = json_object_get(ctun, "tun_dev_name"); |
| 224 | juser_addr = json_object_get(ctun, "user_addr"); |
| 225 | juser_addr_type = json_object_get(ctun, "user_addr_type"); |
| 226 | |
| 227 | if (!jlocal_gtp_ep || !jremote_gtp_ep || !jrx_teid || !jtx_teid || !jtun_dev_name || |
| 228 | !juser_addr || !juser_addr_type) |
| 229 | return -EINVAL; |
| 230 | if (!json_is_object(jlocal_gtp_ep) || !json_is_object(jremote_gtp_ep) || |
| 231 | !json_is_integer(jrx_teid) || !json_is_integer(jtx_teid) || |
| 232 | !json_is_string(jtun_dev_name) || |
| 233 | !json_is_string(juser_addr) || !json_is_string(juser_addr_type)) |
| 234 | return -EINVAL; |
| 235 | |
| 236 | memset(out, 0, sizeof(*out)); |
| 237 | |
| 238 | rc = parse_ep(&out->local_udp, jlocal_gtp_ep); |
| 239 | if (rc < 0) |
| 240 | return rc; |
| 241 | rc = parse_ep(&out->remote_udp, jremote_gtp_ep); |
| 242 | if (rc < 0) |
| 243 | return rc; |
| 244 | rc = parse_eua(&out->user_addr, juser_addr, juser_addr_type); |
| 245 | if (rc < 0) |
| 246 | return rc; |
| 247 | out->rx_teid = json_integer_value(jrx_teid); |
| 248 | out->tx_teid = json_integer_value(jtx_teid); |
| 249 | out->tun_name = talloc_strdup(out, json_string_value(jtun_dev_name)); |
| 250 | |
| 251 | /* optional IEs */ |
| 252 | jtun_netns_name = json_object_get(ctun, "tun_netns_name"); |
| 253 | if (jtun_netns_name) { |
| 254 | if (!json_is_string(jtun_netns_name)) |
| 255 | return -EINVAL; |
| 256 | out->tun_netns_name = talloc_strdup(out, json_string_value(jtun_netns_name)); |
| 257 | } |
| 258 | |
| 259 | return 0; |
| 260 | } |
| 261 | |
| 262 | |
| 263 | static int cups_client_handle_create_tun(struct cups_client *cc, json_t *ctun) |
| 264 | { |
| 265 | int rc; |
| 266 | struct gtp_tunnel_params *tpars = talloc_zero(cc, struct gtp_tunnel_params); |
| 267 | struct gtp_tunnel *t; |
| 268 | |
| 269 | rc = parse_create_tun(tpars, ctun); |
| 270 | if (rc < 0) { |
| 271 | talloc_free(tpars); |
| 272 | return rc; |
| 273 | } |
| 274 | |
| 275 | t = gtp_tunnel_alloc(g_daemon, tpars); |
| 276 | if (!t) { |
| 277 | LOGCC(cc, LOGL_NOTICE, "Failed to allocate tunnel\n"); |
| 278 | cups_client_tx_json(cc, gen_uecups_result("create_tun_res", "ERR_NOT_FOUND")); |
| 279 | } else { |
| 280 | cups_client_tx_json(cc, gen_uecups_result("create_tun_res", "OK")); |
| 281 | } |
| 282 | |
| 283 | talloc_free(tpars); |
| 284 | return 0; |
| 285 | } |
| 286 | |
| 287 | static int cups_client_handle_destroy_tun(struct cups_client *cc, json_t *dtun) |
| 288 | { |
| 289 | struct sockaddr_storage local_ep_addr; |
| 290 | json_t *jlocal_gtp_ep, *jrx_teid; |
| 291 | uint32_t rx_teid; |
| 292 | int rc; |
| 293 | |
| 294 | jlocal_gtp_ep = json_object_get(dtun, "local_gtp_ep"); |
| 295 | jrx_teid = json_object_get(dtun, "rx_teid"); |
| 296 | |
| 297 | if (!jlocal_gtp_ep || !jrx_teid) |
| 298 | return -EINVAL; |
| 299 | |
| 300 | if (!json_is_object(jlocal_gtp_ep) || !json_is_integer(jrx_teid)) |
| 301 | return -EINVAL; |
| 302 | |
| 303 | rc = parse_ep(&local_ep_addr, jlocal_gtp_ep); |
| 304 | if (rc < 0) |
| 305 | return rc; |
| 306 | rx_teid = json_integer_value(jrx_teid); |
| 307 | |
| 308 | rc = gtp_tunnel_destroy(g_daemon, &local_ep_addr, rx_teid); |
| 309 | if (rc < 0) { |
| 310 | LOGCC(cc, LOGL_NOTICE, "Failed to destroy tunnel\n"); |
| 311 | cups_client_tx_json(cc, gen_uecups_result("destroy_tun_res", "ERR_NOT_FOUND")); |
| 312 | } else { |
| 313 | cups_client_tx_json(cc, gen_uecups_result("destroy_tun_res", "OK")); |
| 314 | } |
| 315 | |
| 316 | return 0; |
| 317 | } |
| 318 | |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 319 | static json_t *gen_uecups_term_ind(pid_t pid, int status) |
| 320 | { |
| 321 | json_t *jterm = json_object(); |
| 322 | json_t *jret = json_object(); |
| 323 | |
| 324 | json_object_set_new(jterm, "pid", json_integer(pid)); |
| 325 | json_object_set_new(jterm, "exit_code", json_integer(status)); |
| 326 | |
| 327 | json_object_set_new(jret, "program_term_ind", jterm); |
| 328 | |
| 329 | return jret; |
| 330 | } |
| 331 | |
| 332 | |
| 333 | static struct subprocess *subprocess_by_pid(struct gtp_daemon *d, pid_t pid) |
| 334 | { |
| 335 | struct subprocess *sproc; |
| 336 | llist_for_each_entry(sproc, &d->subprocesses, list) { |
| 337 | if (sproc->pid == pid) |
| 338 | return sproc; |
| 339 | } |
| 340 | return NULL; |
| 341 | } |
| 342 | |
Harald Welte | f9bb177 | 2020-04-21 22:46:34 +0200 | [diff] [blame] | 343 | static void child_terminated(struct gtp_daemon *d, int pid, int status) |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 344 | { |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 345 | struct subprocess *sproc; |
| 346 | json_t *jterm_ind; |
| 347 | |
Harald Welte | f9bb177 | 2020-04-21 22:46:34 +0200 | [diff] [blame] | 348 | LOGP(DUECUPS, LOGL_DEBUG, "SIGCHLD receive from pid %u; status=%d\n", pid, status); |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 349 | |
Harald Welte | f9bb177 | 2020-04-21 22:46:34 +0200 | [diff] [blame] | 350 | sproc = subprocess_by_pid(d, pid); |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 351 | if (!sproc) { |
| 352 | LOGP(DUECUPS, LOGL_NOTICE, "subprocess %u terminated (status=%d) but we don't know it?\n", |
Harald Welte | f9bb177 | 2020-04-21 22:46:34 +0200 | [diff] [blame] | 353 | pid, status); |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 354 | return; |
| 355 | } |
| 356 | |
Harald Welte | f9bb177 | 2020-04-21 22:46:34 +0200 | [diff] [blame] | 357 | /* generate prog_term_ind towards control plane */ |
| 358 | jterm_ind = gen_uecups_term_ind(pid, status); |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 359 | if (!jterm_ind) |
| 360 | return; |
| 361 | |
| 362 | cups_client_tx_json(sproc->cups_client, jterm_ind); |
| 363 | |
| 364 | llist_del(&sproc->list); |
| 365 | talloc_free(sproc); |
| 366 | } |
| 367 | |
Harald Welte | f9bb177 | 2020-04-21 22:46:34 +0200 | [diff] [blame] | 368 | static void sigchild_cb(struct osmo_signalfd *osfd, const struct signalfd_siginfo *fdsi) |
| 369 | { |
| 370 | struct gtp_daemon *d = osfd->data; |
| 371 | int pid, status; |
| 372 | |
| 373 | OSMO_ASSERT(fdsi->ssi_signo == SIGCHLD); |
| 374 | |
Harald Welte | f9bb177 | 2020-04-21 22:46:34 +0200 | [diff] [blame] | 375 | /* it is known that classic signals coalesce: If you get multiple signals of the |
Pau Espin Pedrol | 95ad8c9 | 2022-04-11 15:47:36 +0200 | [diff] [blame] | 376 | * same type before a process is scheduled, the subsequent signals are dropped. This |
Harald Welte | f9bb177 | 2020-04-21 22:46:34 +0200 | [diff] [blame] | 377 | * makes sense for SIGINT or something like this, but for SIGCHLD carrying the PID of |
| 378 | * the terminated process, it doesn't really. Linux had the chance to fix this when |
| 379 | * introducing signalfd() - but the developers decided not to fix it. So the signalfd_siginfo |
| 380 | * contains the PID of one process that terminated - but there may be any number of other |
| 381 | * processes that also have terminated, and for which we don't get events this way. */ |
| 382 | |
| 383 | while ((pid = waitpid(-1, &status, WNOHANG)) > 0) |
| 384 | child_terminated(d, pid, status); |
| 385 | |
| 386 | } |
| 387 | |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 388 | static json_t *gen_uecups_start_res(pid_t pid, const char *result) |
| 389 | { |
| 390 | json_t *ret = gen_uecups_result("start_program_res", result); |
| 391 | json_object_set_new(json_object_get(ret, "start_program_res"), "pid", json_integer(pid)); |
| 392 | |
| 393 | return ret; |
| 394 | } |
| 395 | |
| 396 | static int cups_client_handle_start_program(struct cups_client *cc, json_t *sprog) |
| 397 | { |
| 398 | json_t *juser, *jcmd, *jenv, *jnetns, *jres; |
| 399 | struct gtp_daemon *d = cc->d; |
| 400 | const char *cmd, *user; |
| 401 | char **addl_env = NULL; |
| 402 | sigset_t oldmask; |
Harald Welte | f23abd7 | 2020-04-20 12:09:32 +0200 | [diff] [blame] | 403 | int nsfd = -1, rc; |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 404 | |
| 405 | juser = json_object_get(sprog, "run_as_user"); |
| 406 | jcmd = json_object_get(sprog, "command"); |
| 407 | jenv = json_object_get(sprog, "environment"); |
| 408 | jnetns = json_object_get(sprog, "tun_netns_name"); |
| 409 | |
| 410 | /* mandatory parts */ |
| 411 | if (!juser || !jcmd) |
| 412 | return -EINVAL; |
| 413 | if (!json_is_string(juser) || !json_is_string(jcmd)) |
| 414 | return -EINVAL; |
| 415 | |
| 416 | /* optional parts */ |
| 417 | if (jenv && !json_is_array(jenv)) |
| 418 | return -EINVAL; |
| 419 | if (jnetns && !json_is_string(jnetns)) |
| 420 | return -EINVAL; |
| 421 | |
| 422 | cmd = json_string_value(jcmd); |
| 423 | user = json_string_value(juser); |
| 424 | if (jnetns) { |
| 425 | struct tun_device *tun = tun_device_find_netns(d, json_string_value(jnetns)); |
| 426 | if (!tun) |
| 427 | return -ENODEV; |
| 428 | nsfd = tun->netns_fd; |
| 429 | } |
| 430 | |
| 431 | /* build environment */ |
| 432 | if (jenv) { |
| 433 | json_t *j; |
| 434 | int i; |
| 435 | addl_env = talloc_zero_array(cc, char *, json_array_size(jenv)+1); |
| 436 | if (!addl_env) |
| 437 | return -ENOMEM; |
| 438 | json_array_foreach(jenv, i, j) { |
| 439 | addl_env[i] = talloc_strdup(addl_env, json_string_value(j)); |
| 440 | } |
| 441 | } |
| 442 | |
| 443 | if (jnetns) { |
| 444 | rc = switch_ns(nsfd, &oldmask); |
| 445 | if (rc < 0) { |
| 446 | talloc_free(addl_env); |
| 447 | return -EIO; |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | rc = osmo_system_nowait2(cmd, osmo_environment_whitelist, addl_env, user); |
| 452 | |
| 453 | if (jnetns) { |
| 454 | OSMO_ASSERT(restore_ns(&oldmask) == 0); |
| 455 | } |
| 456 | |
| 457 | talloc_free(addl_env); |
| 458 | |
| 459 | if (rc > 0) { |
| 460 | /* create a record about the subprocess we started, so we can notify the |
| 461 | * client that crated it upon termination */ |
| 462 | struct subprocess *sproc = talloc_zero(cc, struct subprocess); |
| 463 | if (!sproc) |
| 464 | return -ENOMEM; |
| 465 | |
| 466 | sproc->cups_client = cc; |
| 467 | sproc->pid = rc; |
| 468 | llist_add_tail(&sproc->list, &d->subprocesses); |
| 469 | jres = gen_uecups_start_res(sproc->pid, "OK"); |
| 470 | } else { |
| 471 | jres = gen_uecups_start_res(0, "ERR_INVALID_DATA"); |
| 472 | } |
| 473 | |
| 474 | cups_client_tx_json(cc, jres); |
| 475 | |
| 476 | return 0; |
| 477 | } |
| 478 | |
Harald Welte | 0174469 | 2020-04-18 21:00:13 +0200 | [diff] [blame] | 479 | static int cups_client_handle_reset_all_state(struct cups_client *cc, json_t *sprog) |
| 480 | { |
| 481 | struct gtp_daemon *d = cc->d; |
| 482 | struct gtp_tunnel *t, *t2; |
| 483 | struct subprocess *p, *p2; |
| 484 | json_t *jres; |
| 485 | |
Pau Espin Pedrol | 687eafa | 2022-04-11 16:17:05 +0200 | [diff] [blame] | 486 | LOGCC(cc, LOGL_DEBUG, "Destroying all tunnels\n"); |
Harald Welte | 0174469 | 2020-04-18 21:00:13 +0200 | [diff] [blame] | 487 | pthread_rwlock_wrlock(&d->rwlock); |
| 488 | llist_for_each_entry_safe(t, t2, &d->gtp_tunnels, list) { |
| 489 | _gtp_tunnel_destroy(t); |
| 490 | } |
| 491 | pthread_rwlock_unlock(&d->rwlock); |
| 492 | |
| 493 | /* no locking needed as this list is only used by main thread */ |
Pau Espin Pedrol | 687eafa | 2022-04-11 16:17:05 +0200 | [diff] [blame] | 494 | LOGCC(cc, LOGL_DEBUG, "Destroying all subprocesses\n"); |
Harald Welte | 0174469 | 2020-04-18 21:00:13 +0200 | [diff] [blame] | 495 | llist_for_each_entry_safe(p, p2, &d->subprocesses, list) { |
| 496 | subprocess_destroy(p, SIGKILL); |
| 497 | } |
| 498 | |
Pau Espin Pedrol | a459b5c | 2022-04-11 17:00:36 +0200 | [diff] [blame] | 499 | if (d->reset_all_state_tun_remaining == 0) { |
| 500 | jres = gen_uecups_result("reset_all_state_res", "OK"); |
| 501 | cups_client_tx_json(cc, jres); |
| 502 | } else { |
| 503 | cc->reset_all_state_res_pending = true; |
| 504 | } |
Harald Welte | 0174469 | 2020-04-18 21:00:13 +0200 | [diff] [blame] | 505 | |
| 506 | return 0; |
| 507 | } |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 508 | |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 509 | static int cups_client_handle_json(struct cups_client *cc, json_t *jroot) |
| 510 | { |
| 511 | void *iter; |
| 512 | const char *key; |
| 513 | json_t *cmd; |
| 514 | int rc; |
| 515 | |
| 516 | if (!json_is_object(jroot)) |
| 517 | return -EINVAL; |
| 518 | |
| 519 | iter = json_object_iter(jroot); |
| 520 | key = json_object_iter_key(iter); |
| 521 | cmd = json_object_iter_value(iter); |
| 522 | if (!iter || !key || !cmd) |
| 523 | return -EINVAL; |
| 524 | |
| 525 | if (!strcmp(key, "create_tun")) { |
| 526 | rc = cups_client_handle_create_tun(cc, cmd); |
| 527 | } else if (!strcmp(key, "destroy_tun")) { |
| 528 | rc = cups_client_handle_destroy_tun(cc, cmd); |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 529 | } else if (!strcmp(key, "start_program")) { |
| 530 | rc = cups_client_handle_start_program(cc, cmd); |
Harald Welte | 0174469 | 2020-04-18 21:00:13 +0200 | [diff] [blame] | 531 | } else if (!strcmp(key, "reset_all_state")) { |
| 532 | rc = cups_client_handle_reset_all_state(cc, cmd); |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 533 | } else { |
| 534 | LOGCC(cc, LOGL_NOTICE, "Unknown command '%s' received\n", key); |
| 535 | return -EINVAL; |
| 536 | } |
| 537 | |
| 538 | if (rc < 0) { |
| 539 | LOGCC(cc, LOGL_NOTICE, "Error %d handling '%s' command\n", rc, key); |
| 540 | char buf[64]; |
| 541 | snprintf(buf, sizeof(buf), "%s_res", key); |
| 542 | cups_client_tx_json(cc, gen_uecups_result(buf, "ERR_INVALID_DATA")); |
| 543 | return -EINVAL; |
| 544 | } |
| 545 | |
| 546 | return 0; |
| 547 | } |
| 548 | |
| 549 | /* control/user plane separation per-client read cb */ |
| 550 | static int cups_client_read_cb(struct osmo_stream_srv *conn) |
| 551 | { |
| 552 | struct osmo_fd *ofd = osmo_stream_srv_get_ofd(conn); |
| 553 | struct cups_client *cc = osmo_stream_srv_get_data(conn); |
| 554 | struct msgb *msg = msgb_alloc(CUPS_MSGB_SIZE, "Rx JSON"); |
| 555 | struct sctp_sndrcvinfo sinfo; |
| 556 | json_error_t jerr; |
| 557 | json_t *jroot; |
| 558 | int flags = 0; |
| 559 | int rc = 0; |
| 560 | |
| 561 | /* Read message from socket */ |
| 562 | /* we cannot use osmo_stream_srv_recv() here, as we might get some out-of-band info from |
| 563 | * SCTP. FIXME: add something like osmo_stream_srv_recv_sctp() to libosmo-netif and use |
| 564 | * it here as well as in libosmo-sigtran and osmo-msc */ |
| 565 | rc = sctp_recvmsg(ofd->fd, msg->tail, msgb_tailroom(msg), NULL, NULL, &sinfo,&flags); |
| 566 | if (rc <= 0) { |
| 567 | osmo_stream_srv_destroy(conn); |
| 568 | rc = -1; |
| 569 | goto out; |
| 570 | } else |
| 571 | msgb_put(msg, rc); |
| 572 | |
| 573 | if (flags & MSG_NOTIFICATION) { |
| 574 | union sctp_notification *notif = (union sctp_notification *) msgb_data(msg); |
| 575 | switch (notif->sn_header.sn_type) { |
| 576 | case SCTP_SHUTDOWN_EVENT: |
| 577 | osmo_stream_srv_destroy(conn); |
| 578 | rc = -EBADF; |
| 579 | goto out; |
| 580 | default: |
| 581 | break; |
| 582 | } |
| 583 | goto out; |
| 584 | } |
| 585 | |
| 586 | LOGCC(cc, LOGL_DEBUG, "Rx '%s'\n", msgb_data(msg)); |
| 587 | |
| 588 | /* Parse the JSON */ |
| 589 | jroot = json_loadb((const char *) msgb_data(msg), msgb_length(msg), 0, &jerr); |
| 590 | if (!jroot) { |
| 591 | LOGCC(cc, LOGL_ERROR, "Error decoding JSON (%s)", jerr.text); |
| 592 | rc = -1; |
| 593 | goto out; |
| 594 | } |
| 595 | |
| 596 | /* Dispatch */ |
| 597 | rc = cups_client_handle_json(cc, jroot); |
| 598 | |
| 599 | json_decref(jroot); |
| 600 | msgb_free(msg); |
| 601 | |
| 602 | return 0; |
| 603 | out: |
| 604 | msgb_free(msg); |
| 605 | return rc; |
| 606 | } |
| 607 | |
| 608 | static int cups_client_closed_cb(struct osmo_stream_srv *conn) |
| 609 | { |
| 610 | struct cups_client *cc = osmo_stream_srv_get_data(conn); |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 611 | struct gtp_daemon *d = cc->d; |
| 612 | struct subprocess *p, *p2; |
| 613 | |
| 614 | /* kill + forget about all subprocesses of this client */ |
Harald Welte | 0174469 | 2020-04-18 21:00:13 +0200 | [diff] [blame] | 615 | /* We need no locking here as the subprocess list is only used from the main thread */ |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 616 | llist_for_each_entry_safe(p, p2, &d->subprocesses, list) { |
Harald Welte | 0174469 | 2020-04-18 21:00:13 +0200 | [diff] [blame] | 617 | if (p->cups_client == cc) |
| 618 | subprocess_destroy(p, SIGKILL); |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 619 | } |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 620 | |
| 621 | LOGCC(cc, LOGL_INFO, "UECUPS connection lost\n"); |
| 622 | llist_del(&cc->list); |
| 623 | return 0; |
| 624 | } |
| 625 | |
| 626 | |
| 627 | /* the control/user plane separation server bind/accept fd */ |
| 628 | static int cups_accept_cb(struct osmo_stream_srv_link *link, int fd) |
| 629 | { |
| 630 | struct gtp_daemon *d = osmo_stream_srv_link_get_data(link); |
| 631 | struct cups_client *cc; |
| 632 | |
| 633 | cc = talloc_zero(d, struct cups_client); |
| 634 | if (!cc) |
| 635 | return -1; |
| 636 | |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 637 | cc->d = d; |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 638 | osmo_sock_get_name_buf(cc->sockname, sizeof(cc->sockname), fd); |
| 639 | cc->srv = osmo_stream_srv_create(cc, link, fd, cups_client_read_cb, cups_client_closed_cb, cc); |
| 640 | if (!cc->srv) { |
| 641 | talloc_free(cc); |
| 642 | return -1; |
| 643 | } |
| 644 | LOGCC(cc, LOGL_INFO, "Accepted new UECUPS connection\n"); |
| 645 | |
| 646 | llist_add_tail(&cc->list, &d->cups_clients); |
| 647 | |
| 648 | return 0; |
| 649 | } |
| 650 | |
| 651 | /*********************************************************************** |
| 652 | * GTP Daemon |
| 653 | ***********************************************************************/ |
| 654 | |
Harald Welte | 432a130 | 2020-04-17 12:52:40 +0200 | [diff] [blame] | 655 | #ifndef OSMO_VTY_PORT_UECUPS |
| 656 | #define OSMO_VTY_PORT_UECUPS 4268 |
| 657 | #endif |
| 658 | |
Harald Welte | 933dec7 | 2020-04-18 21:41:51 +0200 | [diff] [blame] | 659 | static void *g_tall_ctx; |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 660 | struct gtp_daemon *g_daemon; |
| 661 | static int g_daemonize; |
Harald Welte | 27dc4c4 | 2020-04-20 12:39:13 +0200 | [diff] [blame] | 662 | static char *g_config_file = "osmo-uecups-daemon.cfg"; |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 663 | extern struct vty_app_info g_vty_info; |
| 664 | |
Harald Welte | 933dec7 | 2020-04-18 21:41:51 +0200 | [diff] [blame] | 665 | static void signal_cb(struct osmo_signalfd *osfd, const struct signalfd_siginfo *fdsi) |
| 666 | { |
| 667 | switch (fdsi->ssi_signo) { |
| 668 | case SIGCHLD: |
| 669 | sigchild_cb(osfd, fdsi); |
| 670 | break; |
| 671 | case SIGUSR1: |
| 672 | talloc_report_full(g_tall_ctx, stderr); |
| 673 | break; |
| 674 | default: |
| 675 | break; |
| 676 | } |
| 677 | } |
| 678 | |
Pau Espin Pedrol | a459b5c | 2022-04-11 17:00:36 +0200 | [diff] [blame] | 679 | static void gtp_daemon_itq_read_cb(struct osmo_it_q *q, struct llist_head *item) |
| 680 | { |
| 681 | struct gtp_daemon *d = (struct gtp_daemon *)q->data; |
| 682 | struct gtp_daemon_itq_msg *itq_msg = container_of(item, struct gtp_daemon_itq_msg, list); |
| 683 | |
| 684 | LOGP(DTUN, LOGL_DEBUG, "Rx new itq message from %s\n", |
| 685 | itq_msg->tun_released.tun->devname); |
| 686 | |
| 687 | _tun_device_destroy(itq_msg->tun_released.tun); |
| 688 | if (d->reset_all_state_tun_remaining > 0) { |
| 689 | d->reset_all_state_tun_remaining--; |
| 690 | if (d->reset_all_state_tun_remaining == 0) { |
| 691 | struct cups_client *cc; |
| 692 | llist_for_each_entry(cc, &d->cups_clients, list) { |
| 693 | json_t *jres; |
| 694 | if (!cc->reset_all_state_res_pending) |
| 695 | continue; |
| 696 | cc->reset_all_state_res_pending = false; |
| 697 | jres = gen_uecups_result("reset_all_state_res", "OK"); |
| 698 | cups_client_tx_json(cc, jres); |
| 699 | } |
| 700 | } |
| 701 | } |
| 702 | } |
| 703 | |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 704 | static struct gtp_daemon *gtp_daemon_alloc(void *ctx) |
| 705 | { |
| 706 | struct gtp_daemon *d = talloc_zero(ctx, struct gtp_daemon); |
| 707 | if (!d) |
| 708 | return NULL; |
| 709 | |
| 710 | INIT_LLIST_HEAD(&d->gtp_endpoints); |
| 711 | INIT_LLIST_HEAD(&d->tun_devices); |
| 712 | INIT_LLIST_HEAD(&d->gtp_tunnels); |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 713 | INIT_LLIST_HEAD(&d->subprocesses); |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 714 | pthread_rwlock_init(&d->rwlock, NULL); |
| 715 | d->main_thread = pthread_self(); |
| 716 | |
Pau Espin Pedrol | a459b5c | 2022-04-11 17:00:36 +0200 | [diff] [blame] | 717 | d->itq = osmo_it_q_alloc(d, "itq", 4096, gtp_daemon_itq_read_cb, d); |
| 718 | osmo_fd_register(&d->itq->event_ofd); |
| 719 | |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 720 | INIT_LLIST_HEAD(&d->cups_clients); |
| 721 | |
| 722 | d->cfg.cups_local_ip = talloc_strdup(d, "localhost"); |
Harald Welte | 432a130 | 2020-04-17 12:52:40 +0200 | [diff] [blame] | 723 | d->cfg.cups_local_port = UECUPS_SCTP_PORT; |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 724 | |
| 725 | return d; |
| 726 | } |
| 727 | |
| 728 | static const struct log_info_cat log_categories[] = { |
| 729 | [DTUN] = { |
| 730 | .name ="DTUN", |
| 731 | .description = "Tunnel interface (tun device)", |
| 732 | .enabled = 1, .loglevel = LOGL_INFO, |
| 733 | }, |
| 734 | [DEP] = { |
| 735 | .name = "DEP", |
| 736 | .description = "GTP endpoint (UDP socket)", |
| 737 | .enabled = 1, .loglevel = LOGL_INFO, |
| 738 | }, |
| 739 | [DGT] = { |
| 740 | .name = "DGT", |
| 741 | .description = "GTP tunnel (session)", |
| 742 | .enabled = 1, .loglevel = LOGL_INFO, |
| 743 | }, |
| 744 | [DUECUPS] = { |
| 745 | .name = "DUECUPS", |
| 746 | .description = "UE Control User Plane Separation", |
| 747 | .enabled = 1, .loglevel = LOGL_DEBUG, |
| 748 | }, |
| 749 | |
| 750 | }; |
| 751 | |
| 752 | static const struct log_info log_info = { |
| 753 | .cat = log_categories, |
| 754 | .num_cat = ARRAY_SIZE(log_categories), |
| 755 | }; |
| 756 | |
Pau Espin Pedrol | afa22c6 | 2022-04-12 11:53:16 +0200 | [diff] [blame^] | 757 | static void print_help() |
| 758 | { |
| 759 | printf("Some useful options:\n"); |
| 760 | printf(" -h --help is printing this text.\n"); |
| 761 | printf(" -c --config-file filename The config file to use.\n"); |
| 762 | printf(" -s --disable-color\n"); |
| 763 | printf(" -D --daemonize Fork the process into a background daemon\n"); |
| 764 | printf(" -V --version Print the version number\n"); |
| 765 | |
| 766 | printf("\nVTY reference generation:\n"); |
| 767 | printf(" --vty-ref-mode MODE VTY reference generation mode (e.g. 'expert').\n"); |
| 768 | printf(" --vty-ref-xml Generate the VTY reference XML output and exit.\n"); |
| 769 | } |
| 770 | |
| 771 | static void handle_long_options(const char *prog_name, const int long_option) |
| 772 | { |
| 773 | static int vty_ref_mode = VTY_REF_GEN_MODE_DEFAULT; |
| 774 | |
| 775 | switch (long_option) { |
| 776 | case 1: |
| 777 | vty_ref_mode = get_string_value(vty_ref_gen_mode_names, optarg); |
| 778 | if (vty_ref_mode < 0) { |
| 779 | fprintf(stderr, "%s: Unknown VTY reference generation " |
| 780 | "mode '%s'\n", prog_name, optarg); |
| 781 | exit(2); |
| 782 | } |
| 783 | break; |
| 784 | case 2: |
| 785 | fprintf(stderr, "Generating the VTY reference in mode '%s' (%s)\n", |
| 786 | get_value_string(vty_ref_gen_mode_names, vty_ref_mode), |
| 787 | get_value_string(vty_ref_gen_mode_desc, vty_ref_mode)); |
| 788 | vty_dump_xml_ref_mode(stdout, (enum vty_ref_gen_mode) vty_ref_mode); |
| 789 | exit(0); |
| 790 | default: |
| 791 | fprintf(stderr, "%s: error parsing cmdline options\n", prog_name); |
| 792 | exit(2); |
| 793 | } |
| 794 | } |
| 795 | |
| 796 | static void handle_options(int argc, char **argv) |
| 797 | { |
| 798 | while (1) { |
| 799 | int option_index = 0, c; |
| 800 | static int long_option = 0; |
| 801 | static struct option long_options[] = { |
| 802 | {"help", 0, 0, 'h'}, |
| 803 | {"config-file", 1, 0, 'c'}, |
| 804 | {"daemonize", 0, 0, 'D'}, |
| 805 | {"version", 0, 0, 'V'}, |
| 806 | {"disable-color", 0, 0, 's'}, |
| 807 | {"vty-ref-mode", 1, &long_option, 1}, |
| 808 | {"vty-ref-xml", 0, &long_option, 2}, |
| 809 | {0, 0, 0, 0}, |
| 810 | }; |
| 811 | |
| 812 | c = getopt_long(argc, argv, "hc:sVD", long_options, &option_index); |
| 813 | |
| 814 | if (c == -1) |
| 815 | break; |
| 816 | |
| 817 | switch (c) { |
| 818 | case 'h': |
| 819 | print_help(); |
| 820 | exit(0); |
| 821 | break; |
| 822 | case 0: |
| 823 | handle_long_options(argv[0], long_option); |
| 824 | break; |
| 825 | case 'c': |
| 826 | g_config_file = talloc_strdup(g_tall_ctx, optarg); |
| 827 | break; |
| 828 | case 's': |
| 829 | log_set_use_color(osmo_stderr_target, 0); |
| 830 | break; |
| 831 | case 'V': |
| 832 | print_version(1); |
| 833 | exit(0); |
| 834 | break; |
| 835 | case 'D': |
| 836 | g_daemonize = 1; |
| 837 | break; |
| 838 | default: |
| 839 | /* ignore */ |
| 840 | break; |
| 841 | }; |
| 842 | } |
| 843 | if (argc > optind) { |
| 844 | fprintf(stderr, "Unsupported positional arguments on command line\n"); |
| 845 | exit(2); |
| 846 | } |
| 847 | } |
| 848 | |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 849 | int main(int argc, char **argv) |
| 850 | { |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 851 | int rc; |
| 852 | |
Harald Welte | 933dec7 | 2020-04-18 21:41:51 +0200 | [diff] [blame] | 853 | g_tall_ctx = talloc_named_const(NULL, 0, "root"); |
| 854 | g_vty_info.tall_ctx = g_tall_ctx; |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 855 | |
| 856 | osmo_init_ignore_signals(); |
Harald Welte | 933dec7 | 2020-04-18 21:41:51 +0200 | [diff] [blame] | 857 | osmo_init_logging2(g_tall_ctx, &log_info); |
Vadim Yanitskiy | 8280924 | 2022-01-28 20:32:12 +0600 | [diff] [blame] | 858 | log_enable_multithread(); |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 859 | |
Harald Welte | 933dec7 | 2020-04-18 21:41:51 +0200 | [diff] [blame] | 860 | g_daemon = gtp_daemon_alloc(g_tall_ctx); |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 861 | OSMO_ASSERT(g_daemon); |
| 862 | |
Harald Welte | a932e4e | 2020-04-20 12:10:58 +0200 | [diff] [blame] | 863 | msgb_talloc_ctx_init(g_tall_ctx, 10); |
Harald Welte | 933dec7 | 2020-04-18 21:41:51 +0200 | [diff] [blame] | 864 | osmo_stats_init(g_tall_ctx); |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 865 | vty_init(&g_vty_info); |
| 866 | logging_vty_add_cmds(); |
| 867 | osmo_talloc_vty_add_cmds(); |
| 868 | osmo_stats_vty_add_cmds(); |
Harald Welte | 933dec7 | 2020-04-18 21:41:51 +0200 | [diff] [blame] | 869 | rate_ctr_init(g_tall_ctx); |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 870 | gtpud_vty_init(); |
| 871 | |
Pau Espin Pedrol | afa22c6 | 2022-04-12 11:53:16 +0200 | [diff] [blame^] | 872 | handle_options(argc, argv); |
| 873 | |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 874 | init_netns(); |
| 875 | |
| 876 | rc = vty_read_config_file(g_config_file, NULL); |
| 877 | if (rc < 0) { |
| 878 | fprintf(stderr, "Failed to open config file: '%s'\n", g_config_file); |
| 879 | exit(2); |
| 880 | } |
| 881 | |
Harald Welte | 933dec7 | 2020-04-18 21:41:51 +0200 | [diff] [blame] | 882 | rc = telnet_init_dynif(g_daemon, NULL, vty_get_bind_addr(), OSMO_VTY_PORT_UECUPS); |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 883 | if (rc < 0) |
| 884 | exit(1); |
| 885 | |
| 886 | g_daemon->cups_link = osmo_stream_srv_link_create(g_daemon); |
| 887 | if (!g_daemon->cups_link) { |
| 888 | fprintf(stderr, "Failed to create CUPS socket %s:%u (%s)\n", |
| 889 | g_daemon->cfg.cups_local_ip, g_daemon->cfg.cups_local_port, strerror(errno)); |
| 890 | exit(1); |
| 891 | } |
| 892 | |
| 893 | /* UECUPS socket for control from control plane side */ |
| 894 | osmo_stream_srv_link_set_nodelay(g_daemon->cups_link, true); |
| 895 | osmo_stream_srv_link_set_addr(g_daemon->cups_link, g_daemon->cfg.cups_local_ip); |
| 896 | osmo_stream_srv_link_set_port(g_daemon->cups_link, g_daemon->cfg.cups_local_port); |
| 897 | osmo_stream_srv_link_set_proto(g_daemon->cups_link, IPPROTO_SCTP); |
| 898 | osmo_stream_srv_link_set_data(g_daemon->cups_link, g_daemon); |
| 899 | osmo_stream_srv_link_set_accept_cb(g_daemon->cups_link, cups_accept_cb); |
| 900 | osmo_stream_srv_link_open(g_daemon->cups_link); |
| 901 | |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 902 | /* block SIGCHLD via normal delivery; redirect it to signalfd */ |
| 903 | sigset_t sigset; |
| 904 | sigemptyset(&sigset); |
| 905 | sigaddset(&sigset, SIGCHLD); |
Harald Welte | 933dec7 | 2020-04-18 21:41:51 +0200 | [diff] [blame] | 906 | sigaddset(&sigset, SIGUSR1); |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 907 | sigprocmask(SIG_BLOCK, &sigset, NULL); |
Harald Welte | 933dec7 | 2020-04-18 21:41:51 +0200 | [diff] [blame] | 908 | g_daemon->signalfd = osmo_signalfd_setup(g_daemon, sigset, signal_cb, g_daemon); |
| 909 | osmo_init_ignore_signals(); |
Harald Welte | 24557a7 | 2020-04-17 22:08:29 +0200 | [diff] [blame] | 910 | |
Harald Welte | f736559 | 2020-04-15 21:48:45 +0200 | [diff] [blame] | 911 | if (g_daemonize) { |
| 912 | rc = osmo_daemonize(); |
| 913 | if (rc < 0) { |
| 914 | perror("Error during daemonize"); |
| 915 | exit(1); |
| 916 | } |
| 917 | } |
| 918 | |
| 919 | while (1) { |
| 920 | osmo_select_main(0); |
| 921 | } |
| 922 | } |