Benny Prijono | 4766ffe | 2005-11-01 17:56:59 +0000 | [diff] [blame] | 1 | /* $Id$ |
| 2 | * |
| 3 | */ |
Benny Prijono | dd859a6 | 2005-11-01 16:42:51 +0000 | [diff] [blame] | 4 | #include <pjsip_simple/event_notify.h> |
| 5 | #include <pjsip/sip_msg.h> |
| 6 | #include <pjsip/sip_misc.h> |
| 7 | #include <pjsip/sip_endpoint.h> |
| 8 | #include <pjsip/sip_module.h> |
| 9 | #include <pjsip/sip_transaction.h> |
| 10 | #include <pjsip/sip_event.h> |
| 11 | #include <pj/pool.h> |
| 12 | #include <pj/timer.h> |
| 13 | #include <pj/string.h> |
| 14 | #include <pj/hash.h> |
| 15 | #include <pj/os.h> |
| 16 | #include <pj/except.h> |
| 17 | #include <pj/log.h> |
| 18 | #include <pj/guid.h> |
| 19 | |
| 20 | #define THIS_FILE "event_sub" |
| 21 | |
| 22 | /* String names for state. |
| 23 | * The names here should be compliant with sub_state names in RFC3265. |
| 24 | */ |
| 25 | static const pj_str_t state[] = { |
| 26 | { "null", 4 }, |
| 27 | { "active", 6 }, |
| 28 | { "pending", 7 }, |
| 29 | { "terminated", 10 }, |
| 30 | { "unknown", 7 } |
| 31 | }; |
| 32 | |
| 33 | /* Timer IDs */ |
| 34 | #define TIMER_ID_REFRESH 1 |
| 35 | #define TIMER_ID_UAS_EXPIRY 2 |
| 36 | |
| 37 | /* Static configuration. */ |
| 38 | #define SECONDS_BEFORE_EXPIRY 10 |
| 39 | #define MGR_POOL_SIZE 512 |
| 40 | #define MGR_POOL_INC 0 |
| 41 | #define SUB_POOL_SIZE 2048 |
| 42 | #define SUB_POOL_INC 0 |
| 43 | #define HASH_TABLE_SIZE 32 |
| 44 | |
| 45 | /* Static vars. */ |
| 46 | static int mod_id; |
| 47 | static const pjsip_method SUBSCRIBE = { PJSIP_OTHER_METHOD, {"SUBSCRIBE", 9}}; |
| 48 | static const pjsip_method NOTIFY = { PJSIP_OTHER_METHOD, { "NOTIFY", 6}}; |
| 49 | |
| 50 | typedef struct package |
| 51 | { |
| 52 | PJ_DECL_LIST_MEMBER(struct package) |
| 53 | pj_str_t event; |
| 54 | int accept_cnt; |
| 55 | pj_str_t *accept; |
| 56 | pjsip_event_sub_pkg_cb cb; |
| 57 | } package; |
| 58 | |
| 59 | /* Event subscription manager singleton instance. */ |
| 60 | static struct pjsip_event_sub_mgr |
| 61 | { |
| 62 | pj_pool_t *pool; |
| 63 | pj_hash_table_t *ht; |
| 64 | pjsip_endpoint *endpt; |
| 65 | pj_mutex_t *mutex; |
| 66 | pjsip_allow_events_hdr *allow_events; |
| 67 | package pkg_list; |
| 68 | } mgr; |
| 69 | |
| 70 | /* Fordward declarations for static functions. */ |
| 71 | static pj_status_t mod_init(pjsip_endpoint *, pjsip_module *, pj_uint32_t); |
| 72 | static pj_status_t mod_deinit(pjsip_module*); |
| 73 | static void tsx_handler(pjsip_module*, pjsip_event*); |
| 74 | static pjsip_event_sub *find_sub(pjsip_rx_data *); |
| 75 | static void on_subscribe_request(pjsip_transaction*, pjsip_rx_data*); |
| 76 | static void on_subscribe_response(void *, pjsip_event*); |
| 77 | static void on_notify_request(pjsip_transaction *, pjsip_rx_data*); |
| 78 | static void on_notify_response(void *, pjsip_event *); |
| 79 | static void refresh_timer_cb(pj_timer_heap_t*, pj_timer_entry*); |
| 80 | static void uas_expire_timer_cb(pj_timer_heap_t*, pj_timer_entry*); |
| 81 | static pj_status_t send_sub_refresh( pjsip_event_sub *sub ); |
| 82 | |
| 83 | /* Module descriptor. */ |
| 84 | static pjsip_module event_sub_module = |
| 85 | { |
| 86 | {"EventSub", 8}, /* Name. */ |
| 87 | 0, /* Flag */ |
| 88 | 128, /* Priority */ |
| 89 | &mgr, /* User data. */ |
| 90 | 2, /* Number of methods supported . */ |
| 91 | { &SUBSCRIBE, &NOTIFY }, /* Array of methods */ |
| 92 | &mod_init, /* init_module() */ |
| 93 | NULL, /* start_module() */ |
| 94 | &mod_deinit, /* deinit_module() */ |
| 95 | &tsx_handler, /* tsx_handler() */ |
| 96 | }; |
| 97 | |
| 98 | /* |
| 99 | * Module initialization. |
| 100 | * This will be called by endpoint when it initializes all modules. |
| 101 | */ |
| 102 | static pj_status_t mod_init( pjsip_endpoint *endpt, |
| 103 | struct pjsip_module *mod, pj_uint32_t id ) |
| 104 | { |
| 105 | pj_pool_t *pool; |
| 106 | |
| 107 | pool = pjsip_endpt_create_pool(endpt, "esubmgr", MGR_POOL_SIZE, MGR_POOL_INC); |
| 108 | if (!pool) |
| 109 | return -1; |
| 110 | |
| 111 | /* Manager initialization: create hash table and mutex. */ |
| 112 | mgr.pool = pool; |
| 113 | mgr.endpt = endpt; |
| 114 | mgr.ht = pj_hash_create(pool, HASH_TABLE_SIZE); |
| 115 | if (!mgr.ht) |
| 116 | return -1; |
| 117 | |
| 118 | mgr.mutex = pj_mutex_create(pool, "esubmgr", PJ_MUTEX_SIMPLE); |
| 119 | if (!mgr.mutex) |
| 120 | return -1; |
| 121 | |
| 122 | /* Attach manager to module. */ |
| 123 | mod->mod_data = &mgr; |
| 124 | |
| 125 | /* Init package list. */ |
| 126 | pj_list_init(&mgr.pkg_list); |
| 127 | |
| 128 | /* Init Allow-Events header. */ |
| 129 | mgr.allow_events = pjsip_allow_events_hdr_create(mgr.pool); |
| 130 | |
| 131 | /* Save the module ID. */ |
| 132 | mod_id = id; |
| 133 | |
| 134 | pjsip_event_notify_init_parser(); |
| 135 | return 0; |
| 136 | } |
| 137 | |
| 138 | /* |
| 139 | * Module deinitialization. |
| 140 | * Called by endpoint. |
| 141 | */ |
| 142 | static pj_status_t mod_deinit( struct pjsip_module *mod ) |
| 143 | { |
| 144 | pj_mutex_lock(mgr.mutex); |
| 145 | pj_mutex_destroy(mgr.mutex); |
| 146 | pjsip_endpt_destroy_pool(mgr.endpt, mgr.pool); |
| 147 | return 0; |
| 148 | } |
| 149 | |
| 150 | /* |
| 151 | * This public function is called by application to register callback. |
| 152 | * In exchange, the instance of the module is returned. |
| 153 | */ |
| 154 | PJ_DEF(pjsip_module*) pjsip_event_sub_get_module(void) |
| 155 | { |
| 156 | return &event_sub_module; |
| 157 | } |
| 158 | |
| 159 | /* |
| 160 | * Register event package. |
| 161 | */ |
| 162 | PJ_DEF(pj_status_t) pjsip_event_sub_register_pkg( const pj_str_t *event, |
| 163 | int accept_cnt, |
| 164 | const pj_str_t accept[], |
| 165 | const pjsip_event_sub_pkg_cb *cb ) |
| 166 | { |
| 167 | package *pkg; |
| 168 | int i; |
| 169 | |
| 170 | pj_mutex_lock(mgr.mutex); |
| 171 | |
| 172 | /* Create and register new package. */ |
| 173 | pkg = pj_pool_alloc(mgr.pool, sizeof(*pkg)); |
| 174 | pj_strdup(mgr.pool, &pkg->event, event); |
| 175 | pj_list_insert_before(&mgr.pkg_list, pkg); |
| 176 | |
| 177 | /* Save Accept specification. */ |
| 178 | pkg->accept_cnt = accept_cnt; |
| 179 | pkg->accept = pj_pool_alloc(mgr.pool, accept_cnt*sizeof(pj_str_t)); |
| 180 | for (i=0; i<accept_cnt; ++i) { |
| 181 | pj_strdup(mgr.pool, &pkg->accept[i], &accept[i]); |
| 182 | } |
| 183 | |
| 184 | /* Copy callback. */ |
| 185 | pj_memcpy(&pkg->cb, cb, sizeof(*cb)); |
| 186 | |
| 187 | /* Update Allow-Events header. */ |
| 188 | pj_assert(mgr.allow_events->event_cnt < PJSIP_MAX_ALLOW_EVENTS); |
| 189 | mgr.allow_events->events[mgr.allow_events->event_cnt++] = pkg->event; |
| 190 | |
| 191 | pj_mutex_unlock(mgr.mutex); |
| 192 | return 0; |
| 193 | } |
| 194 | |
| 195 | /* |
| 196 | * Create subscription key (for hash table). |
| 197 | */ |
| 198 | static void create_subscriber_key( pj_str_t *key, pj_pool_t *pool, |
| 199 | pjsip_role_e role, |
| 200 | const pj_str_t *call_id, const pj_str_t *from_tag) |
| 201 | { |
| 202 | char *p; |
| 203 | |
| 204 | p = key->ptr = pj_pool_alloc(pool, call_id->slen + from_tag->slen + 3); |
| 205 | *p++ = (role == PJSIP_ROLE_UAS ? 'S' : 'C'); |
| 206 | *p++ = '$'; |
| 207 | pj_memcpy(p, call_id->ptr, call_id->slen); |
| 208 | p += call_id->slen; |
| 209 | *p++ = '$'; |
| 210 | pj_memcpy(p, from_tag->ptr, from_tag->slen); |
| 211 | p += from_tag->slen; |
| 212 | |
| 213 | key->slen = p - key->ptr; |
| 214 | } |
| 215 | |
| 216 | |
| 217 | /* |
| 218 | * Create UAC subscription. |
| 219 | */ |
| 220 | PJ_DEF(pjsip_event_sub*) pjsip_event_sub_create( pjsip_endpoint *endpt, |
| 221 | const pj_str_t *from, |
| 222 | const pj_str_t *to, |
| 223 | const pj_str_t *event, |
| 224 | int expires, |
| 225 | int accept_cnt, |
| 226 | const pj_str_t accept[], |
| 227 | void *user_data, |
| 228 | const pjsip_event_sub_cb *cb) |
| 229 | { |
| 230 | pjsip_tx_data *tdata; |
| 231 | pj_pool_t *pool; |
| 232 | const pjsip_hdr *hdr; |
| 233 | pjsip_event_sub *sub; |
| 234 | PJ_USE_EXCEPTION; |
| 235 | |
| 236 | PJ_LOG(5,(THIS_FILE, "Creating event subscription %.*s to %.*s", |
| 237 | event->slen, event->ptr, to->slen, to->ptr)); |
| 238 | |
| 239 | /* Create pool for the event subscription. */ |
| 240 | pool = pjsip_endpt_create_pool(endpt, "esub", SUB_POOL_SIZE, SUB_POOL_INC); |
| 241 | if (!pool) { |
| 242 | return NULL; |
| 243 | } |
| 244 | |
| 245 | /* Init subscription. */ |
| 246 | sub = pj_pool_calloc(pool, 1, sizeof(*sub)); |
| 247 | sub->pool = pool; |
| 248 | sub->endpt = endpt; |
| 249 | sub->role = PJSIP_ROLE_UAC; |
| 250 | sub->state = PJSIP_EVENT_SUB_STATE_PENDING; |
| 251 | sub->state_str = state[sub->state]; |
| 252 | sub->user_data = user_data; |
| 253 | sub->timer.id = 0; |
| 254 | sub->default_interval = expires; |
| 255 | pj_memcpy(&sub->cb, cb, sizeof(*cb)); |
| 256 | pj_list_init(&sub->auth_sess); |
| 257 | pj_list_init(&sub->route_set); |
| 258 | sub->mutex = pj_mutex_create(pool, "esub", PJ_MUTEX_RECURSE); |
| 259 | if (!sub->mutex) { |
| 260 | pjsip_endpt_destroy_pool(endpt, pool); |
| 261 | return NULL; |
| 262 | } |
| 263 | |
| 264 | /* The easiest way to parse the parameters is to create a dummy request! */ |
| 265 | tdata = pjsip_endpt_create_request( endpt, &SUBSCRIBE, to, from, to, from, |
| 266 | NULL, -1, NULL); |
| 267 | if (!tdata) { |
| 268 | pj_mutex_destroy(sub->mutex); |
| 269 | pjsip_endpt_destroy_pool(endpt, pool); |
| 270 | return NULL; |
| 271 | } |
| 272 | |
| 273 | /* |
| 274 | * Duplicate headers in the request to our structure. |
| 275 | */ |
| 276 | PJ_TRY { |
| 277 | int i; |
| 278 | |
| 279 | /* From */ |
| 280 | hdr = pjsip_msg_find_hdr(tdata->msg, PJSIP_H_FROM, NULL); |
| 281 | pj_assert(hdr != NULL); |
| 282 | sub->from = pjsip_hdr_clone(pool, hdr); |
| 283 | |
| 284 | /* To */ |
| 285 | hdr = pjsip_msg_find_hdr(tdata->msg, PJSIP_H_TO, NULL); |
| 286 | pj_assert(hdr != NULL); |
| 287 | sub->to = pjsip_hdr_clone(pool, hdr); |
| 288 | |
| 289 | /* Contact. */ |
| 290 | sub->contact = pjsip_contact_hdr_create(pool); |
| 291 | sub->contact->uri = sub->from->uri; |
| 292 | |
| 293 | /* Call-ID */ |
| 294 | hdr = pjsip_msg_find_hdr(tdata->msg, PJSIP_H_CALL_ID, NULL); |
| 295 | pj_assert(hdr != NULL); |
| 296 | sub->call_id = pjsip_hdr_clone(pool, hdr); |
| 297 | |
| 298 | /* CSeq */ |
| 299 | sub->cseq = pj_rand() % 0xFFFF; |
| 300 | |
| 301 | /* Event. */ |
| 302 | sub->event = pjsip_event_hdr_create(sub->pool); |
| 303 | pj_strdup(pool, &sub->event->event_type, event); |
| 304 | |
| 305 | /* Expires. */ |
| 306 | sub->uac_expires = pjsip_expires_hdr_create(pool); |
| 307 | sub->uac_expires->ivalue = expires; |
| 308 | |
| 309 | /* Accept. */ |
| 310 | sub->local_accept = pjsip_accept_hdr_create(pool); |
| 311 | for (i=0; i<accept_cnt && i < PJSIP_MAX_ACCEPT_COUNT; ++i) { |
| 312 | sub->local_accept->count++; |
| 313 | pj_strdup(sub->pool, &sub->local_accept->values[i], &accept[i]); |
| 314 | } |
| 315 | |
| 316 | /* Register to hash table. */ |
| 317 | create_subscriber_key( &sub->key, pool, PJSIP_ROLE_UAC, |
| 318 | &sub->call_id->id, &sub->from->tag); |
| 319 | pj_mutex_lock( mgr.mutex ); |
| 320 | pj_hash_set( pool, mgr.ht, sub->key.ptr, sub->key.slen, sub); |
| 321 | pj_mutex_unlock( mgr.mutex ); |
| 322 | |
| 323 | } |
| 324 | PJ_DEFAULT { |
| 325 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): caught exception %d during init", |
| 326 | sub, state[sub->state].ptr, PJ_GET_EXCEPTION())); |
| 327 | |
| 328 | pjsip_tx_data_dec_ref(tdata); |
| 329 | pj_mutex_destroy(sub->mutex); |
| 330 | pjsip_endpt_destroy_pool(endpt, sub->pool); |
| 331 | return NULL; |
| 332 | } |
| 333 | PJ_END; |
| 334 | |
| 335 | /* All set, delete temporary transmit data as we don't need it. */ |
| 336 | pjsip_tx_data_dec_ref(tdata); |
| 337 | |
| 338 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): client created, target=%.*s, event=%.*s", |
| 339 | sub, state[sub->state].ptr, |
| 340 | to->slen, to->ptr, event->slen, event->ptr)); |
| 341 | |
| 342 | return sub; |
| 343 | } |
| 344 | |
| 345 | /* |
| 346 | * Set credentials. |
| 347 | */ |
| 348 | PJ_DEF(pj_status_t) pjsip_event_sub_set_credentials( pjsip_event_sub *sub, |
| 349 | int count, |
| 350 | const pjsip_cred_info cred[]) |
| 351 | { |
| 352 | pj_mutex_lock(sub->mutex); |
| 353 | if (count > 0) { |
| 354 | sub->cred_info = pj_pool_alloc(sub->pool, count*sizeof(pjsip_cred_info)); |
| 355 | pj_memcpy( sub->cred_info, cred, count*sizeof(pjsip_cred_info)); |
| 356 | } |
| 357 | sub->cred_cnt = count; |
| 358 | pj_mutex_unlock(sub->mutex); |
| 359 | return 0; |
| 360 | } |
| 361 | |
| 362 | /* |
| 363 | * Set route-set. |
| 364 | */ |
| 365 | PJ_DEF(pj_status_t) pjsip_event_sub_set_route_set( pjsip_event_sub *sub, |
| 366 | const pjsip_route_hdr *route_set ) |
| 367 | { |
| 368 | const pjsip_route_hdr *hdr; |
| 369 | |
| 370 | pj_mutex_lock(sub->mutex); |
| 371 | |
| 372 | /* Clear existing route set. */ |
| 373 | pj_list_init(&sub->route_set); |
| 374 | |
| 375 | /* Duplicate route headers. */ |
| 376 | hdr = route_set->next; |
| 377 | while (hdr != route_set) { |
| 378 | pjsip_route_hdr *new_hdr = pjsip_hdr_clone(sub->pool, hdr); |
| 379 | pj_list_insert_before(&sub->route_set, new_hdr); |
| 380 | hdr = hdr->next; |
| 381 | } |
| 382 | |
| 383 | pj_mutex_unlock(sub->mutex); |
| 384 | |
| 385 | return 0; |
| 386 | } |
| 387 | |
| 388 | /* |
| 389 | * Send subscribe request. |
| 390 | */ |
| 391 | PJ_DEF(pj_status_t) pjsip_event_sub_subscribe( pjsip_event_sub *sub ) |
| 392 | { |
| 393 | pj_status_t status; |
| 394 | |
| 395 | pj_mutex_lock(sub->mutex); |
| 396 | status = send_sub_refresh(sub); |
| 397 | pj_mutex_unlock(sub->mutex); |
| 398 | |
| 399 | return status; |
| 400 | } |
| 401 | |
| 402 | /* |
| 403 | * Destroy subscription. |
| 404 | * If there are pending transactions, then this will just set the flag. |
| 405 | */ |
| 406 | PJ_DEF(pj_status_t) pjsip_event_sub_destroy(pjsip_event_sub *sub) |
| 407 | { |
| 408 | pj_assert(sub != NULL); |
| 409 | if (sub == NULL) |
| 410 | return -1; |
| 411 | |
| 412 | /* Application must terminate the subscription first. */ |
| 413 | pj_assert(sub->state == PJSIP_EVENT_SUB_STATE_NULL || |
| 414 | sub->state == PJSIP_EVENT_SUB_STATE_TERMINATED); |
| 415 | |
| 416 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): about to be destroyed", |
| 417 | sub, state[sub->state].ptr)); |
| 418 | |
| 419 | pj_mutex_lock(mgr.mutex); |
| 420 | pj_mutex_lock(sub->mutex); |
| 421 | |
| 422 | /* Set delete flag. */ |
| 423 | sub->delete_flag = 1; |
| 424 | |
| 425 | /* Unregister timer, if any. */ |
| 426 | if (sub->timer.id != 0) { |
| 427 | pjsip_endpt_cancel_timer(sub->endpt, &sub->timer); |
| 428 | sub->timer.id = 0; |
| 429 | } |
| 430 | |
| 431 | if (sub->pending_tsx > 0) { |
| 432 | pj_mutex_unlock(sub->mutex); |
| 433 | pj_mutex_unlock(mgr.mutex); |
| 434 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): has %d pending, will destroy later", |
| 435 | sub, state[sub->state].ptr, |
| 436 | sub->pending_tsx)); |
| 437 | return 1; |
| 438 | } |
| 439 | |
| 440 | /* Unregister from hash table. */ |
| 441 | pj_hash_set(sub->pool, mgr.ht, sub->key.ptr, sub->key.slen, NULL); |
| 442 | |
| 443 | /* Destroy. */ |
| 444 | pj_mutex_destroy(sub->mutex); |
| 445 | pjsip_endpt_destroy_pool(sub->endpt, sub->pool); |
| 446 | |
| 447 | pj_mutex_unlock(mgr.mutex); |
| 448 | |
| 449 | PJ_LOG(4,(THIS_FILE, "event_sub%p: destroyed", sub)); |
| 450 | return 0; |
| 451 | } |
| 452 | |
| 453 | /* Change state. */ |
| 454 | static void sub_set_state( pjsip_event_sub *sub, int new_state) |
| 455 | { |
| 456 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): changed state to %s", |
| 457 | sub, state[sub->state].ptr, state[new_state].ptr)); |
| 458 | sub->state = new_state; |
| 459 | sub->state_str = state[new_state]; |
| 460 | } |
| 461 | |
| 462 | /* |
| 463 | * Refresh subscription. |
| 464 | */ |
| 465 | static pj_status_t send_sub_refresh( pjsip_event_sub *sub ) |
| 466 | { |
| 467 | pjsip_tx_data *tdata; |
| 468 | pj_status_t status; |
| 469 | const pjsip_route_hdr *route; |
| 470 | |
| 471 | pj_assert(sub->role == PJSIP_ROLE_UAC); |
| 472 | pj_assert(sub->state != PJSIP_EVENT_SUB_STATE_TERMINATED); |
| 473 | if (sub->role != PJSIP_ROLE_UAC || |
| 474 | sub->state == PJSIP_EVENT_SUB_STATE_TERMINATED) |
| 475 | { |
| 476 | return -1; |
| 477 | } |
| 478 | |
| 479 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): refreshing subscription", |
| 480 | sub, state[sub->state].ptr)); |
| 481 | |
| 482 | /* Create request. */ |
| 483 | tdata = pjsip_endpt_create_request_from_hdr( sub->endpt, |
| 484 | &SUBSCRIBE, |
| 485 | sub->to->uri, |
| 486 | sub->from, sub->to, |
| 487 | sub->contact, sub->call_id, |
| 488 | sub->cseq++, |
| 489 | NULL); |
| 490 | |
| 491 | if (!tdata) { |
| 492 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): refresh: unable to create tx data!", |
| 493 | sub, state[sub->state].ptr)); |
| 494 | return -1; |
| 495 | } |
| 496 | |
| 497 | pjsip_msg_add_hdr( tdata->msg, |
| 498 | pjsip_hdr_shallow_clone(tdata->pool, sub->event)); |
| 499 | pjsip_msg_add_hdr( tdata->msg, |
| 500 | pjsip_hdr_shallow_clone(tdata->pool, sub->uac_expires)); |
| 501 | pjsip_msg_add_hdr( tdata->msg, |
| 502 | pjsip_hdr_shallow_clone(tdata->pool, sub->local_accept)); |
| 503 | pjsip_msg_add_hdr( tdata->msg, |
| 504 | pjsip_hdr_shallow_clone(tdata->pool, mgr.allow_events)); |
| 505 | |
| 506 | /* Authentication */ |
| 507 | pjsip_auth_init_req( sub->pool, tdata, &sub->auth_sess, |
| 508 | sub->cred_cnt, sub->cred_info); |
| 509 | |
| 510 | /* Route set. */ |
| 511 | route = sub->route_set.next; |
| 512 | while (route != &sub->route_set) { |
| 513 | pj_list_insert_before( &tdata->msg->hdr, |
| 514 | pjsip_hdr_shallow_clone(tdata->pool, route)); |
| 515 | route = route->next; |
| 516 | } |
| 517 | |
| 518 | /* Send */ |
| 519 | status = pjsip_endpt_send_request( sub->endpt, tdata, -1, sub, |
| 520 | &on_subscribe_response); |
| 521 | if (status == 0) { |
| 522 | sub->pending_tsx++; |
| 523 | } else { |
| 524 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): FAILED to refresh subscription!", |
| 525 | sub, state[sub->state].ptr)); |
| 526 | } |
| 527 | |
| 528 | return status; |
| 529 | } |
| 530 | |
| 531 | /* |
| 532 | * Stop subscription. |
| 533 | */ |
| 534 | PJ_DEF(pj_status_t) pjsip_event_sub_unsubscribe( pjsip_event_sub *sub ) |
| 535 | { |
| 536 | pjsip_tx_data *tdata; |
| 537 | const pjsip_route_hdr *route; |
| 538 | pj_status_t status; |
| 539 | |
| 540 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): unsubscribing...", |
| 541 | sub, state[sub->state].ptr)); |
| 542 | |
| 543 | /* Lock subscription. */ |
| 544 | pj_mutex_lock(sub->mutex); |
| 545 | |
| 546 | pj_assert(sub->role == PJSIP_ROLE_UAC); |
| 547 | |
| 548 | /* Kill refresh timer, if any. */ |
| 549 | if (sub->timer.id != 0) { |
| 550 | sub->timer.id = 0; |
| 551 | pjsip_endpt_cancel_timer(sub->endpt, &sub->timer); |
| 552 | } |
| 553 | |
| 554 | /* Create request. */ |
| 555 | tdata = pjsip_endpt_create_request_from_hdr( sub->endpt, |
| 556 | &SUBSCRIBE, |
| 557 | sub->to->uri, |
| 558 | sub->from, sub->to, |
| 559 | sub->contact, sub->call_id, |
| 560 | sub->cseq++, |
| 561 | NULL); |
| 562 | |
| 563 | if (!tdata) { |
| 564 | pj_mutex_unlock(sub->mutex); |
| 565 | return -1; |
| 566 | } |
| 567 | |
| 568 | /* Add headers to request. */ |
| 569 | pjsip_msg_add_hdr( tdata->msg, pjsip_hdr_shallow_clone(tdata->pool, sub->event)); |
| 570 | sub->uac_expires->ivalue = 0; |
| 571 | pjsip_msg_add_hdr( tdata->msg, pjsip_hdr_shallow_clone(tdata->pool, sub->uac_expires)); |
| 572 | |
| 573 | /* Add authentication. */ |
| 574 | pjsip_auth_init_req( sub->pool, tdata, &sub->auth_sess, |
| 575 | sub->cred_cnt, sub->cred_info); |
| 576 | |
| 577 | |
| 578 | /* Route set. */ |
| 579 | route = sub->route_set.next; |
| 580 | while (route != &sub->route_set) { |
| 581 | pj_list_insert_before( &tdata->msg->hdr, |
| 582 | pjsip_hdr_shallow_clone(tdata->pool, route)); |
| 583 | route = route->next; |
| 584 | } |
| 585 | |
| 586 | /* Prevent timer from refreshing itself. */ |
| 587 | sub->default_interval = 0; |
| 588 | |
| 589 | /* Set state. */ |
| 590 | sub_set_state( sub, PJSIP_EVENT_SUB_STATE_TERMINATED ); |
| 591 | |
| 592 | /* Send the request. */ |
| 593 | status = pjsip_endpt_send_request( sub->endpt, tdata, -1, sub, |
| 594 | &on_subscribe_response); |
| 595 | if (status == 0) { |
| 596 | sub->pending_tsx++; |
| 597 | } |
| 598 | |
| 599 | pj_mutex_unlock(sub->mutex); |
| 600 | |
| 601 | if (status != 0) { |
| 602 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): FAILED to unsubscribe!", |
| 603 | sub, state[sub->state].ptr)); |
| 604 | } |
| 605 | |
| 606 | return status; |
| 607 | } |
| 608 | |
| 609 | /* |
| 610 | * Send notify. |
| 611 | */ |
| 612 | PJ_DEF(pj_status_t) pjsip_event_sub_notify(pjsip_event_sub *sub, |
| 613 | pjsip_event_sub_state new_state, |
| 614 | const pj_str_t *reason, |
| 615 | pjsip_msg_body *body) |
| 616 | { |
| 617 | pjsip_tx_data *tdata; |
| 618 | pjsip_sub_state_hdr *ss_hdr; |
| 619 | const pjsip_route_hdr *route; |
| 620 | pj_time_val now; |
| 621 | pj_status_t status; |
| 622 | pjsip_event_sub_state old_state = sub->state; |
| 623 | |
| 624 | pj_gettimeofday(&now); |
| 625 | |
| 626 | pj_assert(sub->role == PJSIP_ROLE_UAS); |
| 627 | if (sub->role != PJSIP_ROLE_UAS) |
| 628 | return -1; |
| 629 | |
| 630 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): sending NOTIFY", |
| 631 | sub, state[new_state].ptr)); |
| 632 | |
| 633 | /* Lock subscription. */ |
| 634 | pj_mutex_lock(sub->mutex); |
| 635 | |
| 636 | /* Can not send NOTIFY if current state is NULL. We can accept TERMINATED. */ |
| 637 | if (sub->state==PJSIP_EVENT_SUB_STATE_NULL) { |
| 638 | pj_assert(0); |
| 639 | pj_mutex_unlock(sub->mutex); |
| 640 | return -1; |
| 641 | } |
| 642 | |
| 643 | /* Update state no matter what. */ |
| 644 | sub_set_state(sub, new_state); |
| 645 | |
| 646 | /* Create transmit data. */ |
| 647 | tdata = pjsip_endpt_create_request_from_hdr( sub->endpt, |
| 648 | &NOTIFY, |
| 649 | sub->to->uri, |
| 650 | sub->from, sub->to, |
| 651 | sub->contact, sub->call_id, |
| 652 | sub->cseq++, |
| 653 | NULL); |
| 654 | if (!tdata) { |
| 655 | pj_mutex_unlock(sub->mutex); |
| 656 | return -1; |
| 657 | } |
| 658 | |
| 659 | /* Add Event header. */ |
| 660 | pjsip_msg_add_hdr(tdata->msg, pjsip_hdr_shallow_clone(tdata->pool, sub->event)); |
| 661 | |
| 662 | /* Add Subscription-State header. */ |
| 663 | ss_hdr = pjsip_sub_state_hdr_create(tdata->pool); |
| 664 | ss_hdr->sub_state = state[new_state]; |
| 665 | ss_hdr->expires_param = sub->expiry_time.sec - now.sec; |
| 666 | if (ss_hdr->expires_param < 0) |
| 667 | ss_hdr->expires_param = 0; |
| 668 | if (reason) |
| 669 | pj_strdup(tdata->pool, &ss_hdr->reason_param, reason); |
| 670 | pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)ss_hdr); |
| 671 | |
| 672 | /* Add Allow-Events header. */ |
| 673 | pjsip_msg_add_hdr( tdata->msg, |
| 674 | pjsip_hdr_shallow_clone(tdata->pool, mgr.allow_events)); |
| 675 | |
| 676 | /* Add authentication */ |
| 677 | pjsip_auth_init_req( sub->pool, tdata, &sub->auth_sess, |
| 678 | sub->cred_cnt, sub->cred_info); |
| 679 | |
| 680 | /* Route set. */ |
| 681 | route = sub->route_set.next; |
| 682 | while (route != &sub->route_set) { |
| 683 | pj_list_insert_before( &tdata->msg->hdr, |
| 684 | pjsip_hdr_shallow_clone(tdata->pool, route)); |
| 685 | route = route->next; |
| 686 | } |
| 687 | |
| 688 | /* Attach body. */ |
| 689 | tdata->msg->body = body; |
| 690 | |
| 691 | /* That's it, send! */ |
| 692 | status = pjsip_endpt_send_request( sub->endpt, tdata, -1, sub, &on_notify_response); |
| 693 | if (status == 0) |
| 694 | sub->pending_tsx++; |
| 695 | |
| 696 | /* If terminated notify application. */ |
| 697 | if (new_state!=old_state && new_state==PJSIP_EVENT_SUB_STATE_TERMINATED) { |
| 698 | if (sub->cb.on_sub_terminated) { |
| 699 | sub->pending_tsx++; |
| 700 | (*sub->cb.on_sub_terminated)(sub, reason); |
| 701 | sub->pending_tsx--; |
| 702 | } |
| 703 | } |
| 704 | |
| 705 | /* Unlock subscription. */ |
| 706 | pj_mutex_unlock(sub->mutex); |
| 707 | |
| 708 | if (status != 0) { |
| 709 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): failed to send NOTIFY", |
| 710 | sub, state[sub->state].ptr)); |
| 711 | } |
| 712 | |
| 713 | if (sub->delete_flag && sub->pending_tsx <= 0) { |
| 714 | pjsip_event_sub_destroy(sub); |
| 715 | } |
| 716 | return status; |
| 717 | } |
| 718 | |
| 719 | |
| 720 | /* If this timer callback is called, it means subscriber hasn't refreshed its |
| 721 | * subscription on-time. Set the state to terminated. This will also send |
| 722 | * NOTIFY with Subscription-State set to terminated. |
| 723 | */ |
| 724 | static void uas_expire_timer_cb( pj_timer_heap_t *timer_heap, pj_timer_entry *entry) |
| 725 | { |
| 726 | pjsip_event_sub *sub = entry->user_data; |
| 727 | pj_str_t reason = { "timeout", 7 }; |
| 728 | |
| 729 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): UAS subscription expired!", |
| 730 | sub, state[sub->state].ptr)); |
| 731 | |
| 732 | pj_mutex_lock(sub->mutex); |
| 733 | sub->timer.id = 0; |
| 734 | |
| 735 | if (sub->cb.on_sub_terminated && sub->state!=PJSIP_EVENT_SUB_STATE_TERMINATED) { |
| 736 | /* Notify application, but prevent app from destroying the sub. */ |
| 737 | ++sub->pending_tsx; |
| 738 | (*sub->cb.on_sub_terminated)(sub, &reason); |
| 739 | --sub->pending_tsx; |
| 740 | } |
| 741 | //pjsip_event_sub_notify( sub, PJSIP_EVENT_SUB_STATE_TERMINATED, |
| 742 | // &reason, NULL); |
| 743 | pj_mutex_unlock(sub->mutex); |
| 744 | |
| 745 | } |
| 746 | |
| 747 | /* Schedule notifier expiration. */ |
| 748 | static void sub_schedule_uas_expire( pjsip_event_sub *sub, int sec_delay) |
| 749 | { |
| 750 | pj_time_val delay = { 0, 0 }; |
| 751 | pj_parsed_time pt; |
| 752 | |
| 753 | if (sub->timer.id != 0) |
| 754 | pjsip_endpt_cancel_timer(sub->endpt, &sub->timer); |
| 755 | |
| 756 | pj_gettimeofday(&sub->expiry_time); |
| 757 | sub->expiry_time.sec += sec_delay; |
| 758 | |
| 759 | sub->timer.id = TIMER_ID_UAS_EXPIRY; |
| 760 | sub->timer.user_data = sub; |
| 761 | sub->timer.cb = &uas_expire_timer_cb; |
| 762 | delay.sec = sec_delay; |
| 763 | pjsip_endpt_schedule_timer( sub->endpt, &sub->timer, &delay); |
| 764 | |
| 765 | pj_time_decode(&sub->expiry_time, &pt); |
| 766 | PJ_LOG(4,(THIS_FILE, |
| 767 | "event_sub%p (%s)(UAS): will expire at %02d:%02d:%02d (in %d secs)", |
| 768 | sub, state[sub->state].ptr, pt.hour, pt.min, pt.sec, sec_delay)); |
| 769 | } |
| 770 | |
| 771 | /* This timer is called for UAC to refresh the subscription. */ |
| 772 | static void refresh_timer_cb( pj_timer_heap_t *timer_heap, pj_timer_entry *entry) |
| 773 | { |
| 774 | pjsip_event_sub *sub = entry->user_data; |
| 775 | |
| 776 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): refresh subscription timer", |
| 777 | sub, state[sub->state].ptr)); |
| 778 | |
| 779 | pj_mutex_lock(sub->mutex); |
| 780 | sub->timer.id = 0; |
| 781 | send_sub_refresh(sub); |
| 782 | pj_mutex_unlock(sub->mutex); |
| 783 | } |
| 784 | |
| 785 | |
| 786 | /* This will update the UAC's refresh schedule. */ |
| 787 | static void update_next_refresh(pjsip_event_sub *sub, int interval) |
| 788 | { |
| 789 | pj_time_val delay = {0, 0}; |
| 790 | pj_parsed_time pt; |
| 791 | |
| 792 | if (interval < SECONDS_BEFORE_EXPIRY) { |
| 793 | PJ_LOG(4,(THIS_FILE, |
| 794 | "event_sub%p (%s): expiration delay too short (%d sec)! updated.", |
| 795 | sub, state[sub->state].ptr, interval)); |
| 796 | interval = SECONDS_BEFORE_EXPIRY; |
| 797 | } |
| 798 | |
| 799 | if (sub->timer.id != 0) |
| 800 | pjsip_endpt_cancel_timer(sub->endpt, &sub->timer); |
| 801 | |
| 802 | sub->timer.id = TIMER_ID_REFRESH; |
| 803 | sub->timer.user_data = sub; |
| 804 | sub->timer.cb = &refresh_timer_cb; |
| 805 | pj_gettimeofday(&sub->expiry_time); |
| 806 | delay.sec = interval - SECONDS_BEFORE_EXPIRY; |
| 807 | sub->expiry_time.sec += delay.sec; |
| 808 | |
| 809 | pj_time_decode(&sub->expiry_time, &pt); |
| 810 | PJ_LOG(4,(THIS_FILE, |
| 811 | "event_sub%p (%s): will send SUBSCRIBE at %02d:%02d:%02d (in %d secs)", |
| 812 | sub, state[sub->state].ptr, |
| 813 | pt.hour, pt.min, pt.sec, |
| 814 | delay.sec)); |
| 815 | |
| 816 | pjsip_endpt_schedule_timer( sub->endpt, &sub->timer, &delay ); |
| 817 | } |
| 818 | |
| 819 | |
| 820 | /* Find subscription in the hash table. |
| 821 | * If found, lock the subscription before returning to caller. |
| 822 | */ |
| 823 | static pjsip_event_sub *find_sub(pjsip_rx_data *rdata) |
| 824 | { |
| 825 | pj_str_t key; |
| 826 | pjsip_role_e role; |
| 827 | pjsip_event_sub *sub; |
| 828 | pjsip_method *method = &rdata->msg->line.req.method; |
| 829 | pj_str_t *tag; |
| 830 | |
| 831 | if (rdata->msg->type == PJSIP_REQUEST_MSG) { |
| 832 | if (pjsip_method_cmp(method, &SUBSCRIBE)==0) { |
| 833 | role = PJSIP_ROLE_UAS; |
| 834 | tag = &rdata->to_tag; |
| 835 | } else { |
| 836 | pj_assert(pjsip_method_cmp(method, &NOTIFY) == 0); |
| 837 | role = PJSIP_ROLE_UAC; |
| 838 | tag = &rdata->to_tag; |
| 839 | } |
| 840 | } else { |
| 841 | if (pjsip_method_cmp(&rdata->cseq->method, &SUBSCRIBE)==0) { |
| 842 | role = PJSIP_ROLE_UAC; |
| 843 | tag = &rdata->from_tag; |
| 844 | } else { |
| 845 | pj_assert(pjsip_method_cmp(method, &NOTIFY) == 0); |
| 846 | role = PJSIP_ROLE_UAS; |
| 847 | tag = &rdata->from_tag; |
| 848 | } |
| 849 | } |
| 850 | create_subscriber_key( &key, rdata->pool, role, &rdata->call_id, tag); |
| 851 | |
| 852 | pj_mutex_lock(mgr.mutex); |
| 853 | sub = pj_hash_get(mgr.ht, key.ptr, key.slen); |
| 854 | if (sub) |
| 855 | pj_mutex_lock(sub->mutex); |
| 856 | pj_mutex_unlock(mgr.mutex); |
| 857 | |
| 858 | return sub; |
| 859 | } |
| 860 | |
| 861 | |
| 862 | /* This function is called when we receive SUBSCRIBE request message |
| 863 | * to refresh existing subscription. |
| 864 | */ |
| 865 | static void on_received_sub_refresh( pjsip_event_sub *sub, |
| 866 | pjsip_transaction *tsx, pjsip_rx_data *rdata) |
| 867 | { |
| 868 | pjsip_event_hdr *e; |
| 869 | pjsip_expires_hdr *expires; |
| 870 | pj_str_t hname; |
| 871 | int status = 200; |
| 872 | pj_str_t reason_phrase = { NULL, 0 }; |
| 873 | int new_state = sub->state; |
| 874 | int old_state = sub->state; |
| 875 | int new_interval = 0; |
| 876 | pjsip_tx_data *tdata; |
| 877 | |
| 878 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): received target refresh", |
| 879 | sub, state[sub->state].ptr)); |
| 880 | |
| 881 | /* Check that the event matches. */ |
| 882 | hname = pj_str("Event"); |
| 883 | e = pjsip_msg_find_hdr_by_name( rdata->msg, &hname, NULL); |
| 884 | if (!e) { |
| 885 | status = 400; |
| 886 | reason_phrase = pj_str("Missing Event header"); |
| 887 | goto send_response; |
| 888 | } |
| 889 | if (pj_stricmp(&e->event_type, &sub->event->event_type) != 0 || |
| 890 | pj_stricmp(&e->id_param, &sub->event->id_param) != 0) |
| 891 | { |
| 892 | status = 481; |
| 893 | reason_phrase = pj_str("Subscription does not exist"); |
| 894 | goto send_response; |
| 895 | } |
| 896 | |
| 897 | /* Check server state. */ |
| 898 | if (sub->state == PJSIP_EVENT_SUB_STATE_TERMINATED) { |
| 899 | status = 481; |
| 900 | reason_phrase = pj_str("Subscription does not exist"); |
| 901 | goto send_response; |
| 902 | } |
| 903 | |
| 904 | /* Check expires header. */ |
| 905 | expires = pjsip_msg_find_hdr(rdata->msg, PJSIP_H_EXPIRES, NULL); |
| 906 | if (!expires) { |
| 907 | /* |
| 908 | status = 400; |
| 909 | reason_phrase = pj_str("Missing Expires header"); |
| 910 | goto send_response; |
| 911 | */ |
| 912 | new_interval = sub->default_interval; |
| 913 | } else { |
| 914 | /* Check that interval is not too short. |
| 915 | * Note that expires time may be zero (for unsubscription). |
| 916 | */ |
| 917 | new_interval = expires->ivalue; |
| 918 | if (new_interval != 0 && new_interval < SECONDS_BEFORE_EXPIRY) { |
| 919 | status = PJSIP_SC_INTERVAL_TOO_BRIEF; |
| 920 | goto send_response; |
| 921 | } |
| 922 | } |
| 923 | |
| 924 | /* Update interval. */ |
| 925 | sub->default_interval = new_interval; |
| 926 | pj_gettimeofday(&sub->expiry_time); |
| 927 | sub->expiry_time.sec += new_interval; |
| 928 | |
| 929 | /* Update timer only if this is not unsubscription. */ |
| 930 | if (new_interval > 0) { |
| 931 | sub->default_interval = new_interval; |
| 932 | sub_schedule_uas_expire( sub, new_interval ); |
| 933 | |
| 934 | /* Call callback. */ |
| 935 | if (sub->cb.on_received_refresh) { |
| 936 | sub->pending_tsx++; |
| 937 | (*sub->cb.on_received_refresh)(sub, rdata); |
| 938 | sub->pending_tsx--; |
| 939 | } |
| 940 | } |
| 941 | |
| 942 | send_response: |
| 943 | tdata = pjsip_endpt_create_response( sub->endpt, rdata, status); |
| 944 | if (tdata) { |
| 945 | if (reason_phrase.slen) |
| 946 | tdata->msg->line.status.reason = reason_phrase; |
| 947 | |
| 948 | /* Add Expires header. */ |
| 949 | expires = pjsip_expires_hdr_create(tdata->pool); |
| 950 | expires->ivalue = sub->default_interval; |
| 951 | pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)expires); |
| 952 | |
| 953 | if (PJSIP_IS_STATUS_IN_CLASS(status,200)) { |
| 954 | pjsip_msg_add_hdr(tdata->msg, |
| 955 | pjsip_hdr_shallow_clone(tdata->pool, mgr.allow_events)); |
| 956 | } |
| 957 | /* Send down to transaction. */ |
| 958 | pjsip_tsx_on_tx_msg(tsx, tdata); |
| 959 | } |
| 960 | |
| 961 | if (sub->default_interval==0 || !PJSIP_IS_STATUS_IN_CLASS(status,200)) { |
| 962 | /* Notify application if sub is terminated. */ |
| 963 | new_state = PJSIP_EVENT_SUB_STATE_TERMINATED; |
| 964 | sub_set_state(sub, new_state); |
| 965 | if (new_state!=old_state && sub->cb.on_sub_terminated) { |
| 966 | pj_str_t reason = {"", 0}; |
| 967 | if (reason_phrase.slen) reason = reason_phrase; |
| 968 | else reason = *pjsip_get_status_text(status); |
| 969 | |
| 970 | sub->pending_tsx++; |
| 971 | (*sub->cb.on_sub_terminated)(sub, &reason); |
| 972 | sub->pending_tsx--; |
| 973 | } |
| 974 | } |
| 975 | |
| 976 | pj_mutex_unlock(sub->mutex); |
| 977 | |
| 978 | /* Prefer to call log when we're not holding the mutex. */ |
| 979 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): sent refresh response %s, status=%d", |
| 980 | sub, state[sub->state].ptr, |
| 981 | (tdata ? tdata->obj_name : "null"), status)); |
| 982 | |
| 983 | /* Check if application has requested deletion. */ |
| 984 | if (sub->delete_flag && sub->pending_tsx <= 0) { |
| 985 | pjsip_event_sub_destroy(sub); |
| 986 | } |
| 987 | |
| 988 | } |
| 989 | |
| 990 | |
| 991 | /* This function is called when we receive SUBSCRIBE request message for |
| 992 | * a new subscription. |
| 993 | */ |
| 994 | static void on_new_subscription( pjsip_transaction *tsx, pjsip_rx_data *rdata ) |
| 995 | { |
| 996 | package *pkg; |
| 997 | pj_pool_t *pool; |
| 998 | pjsip_event_sub *sub = NULL; |
| 999 | pj_str_t hname; |
| 1000 | int status = 200; |
| 1001 | pj_str_t reason = { NULL, 0 }; |
| 1002 | pjsip_tx_data *tdata; |
| 1003 | pjsip_expires_hdr *expires; |
| 1004 | pjsip_accept_hdr *accept; |
| 1005 | pjsip_event_hdr *evhdr; |
| 1006 | |
| 1007 | /* Get the Event header. */ |
| 1008 | hname = pj_str("Event"); |
| 1009 | evhdr = pjsip_msg_find_hdr_by_name(rdata->msg, &hname, NULL); |
| 1010 | if (!evhdr) { |
| 1011 | status = 400; |
| 1012 | reason = pj_str("No Event header in request"); |
| 1013 | goto send_response; |
| 1014 | } |
| 1015 | |
| 1016 | /* Find corresponding package. |
| 1017 | * We don't lock the manager's mutex since we assume the package list |
| 1018 | * won't change once the application is running! |
| 1019 | */ |
| 1020 | pkg = mgr.pkg_list.next; |
| 1021 | while (pkg != &mgr.pkg_list) { |
| 1022 | if (pj_stricmp(&pkg->event, &evhdr->event_type) == 0) |
| 1023 | break; |
| 1024 | pkg = pkg->next; |
| 1025 | } |
| 1026 | |
| 1027 | if (pkg == &mgr.pkg_list) { |
| 1028 | /* Event type is not supported by any packages! */ |
| 1029 | status = 489; |
| 1030 | reason = pj_str("Bad Event"); |
| 1031 | goto send_response; |
| 1032 | } |
| 1033 | |
| 1034 | /* First check that the Accept specification matches the |
| 1035 | * package's Accept types. |
| 1036 | */ |
| 1037 | accept = pjsip_msg_find_hdr(rdata->msg, PJSIP_H_ACCEPT, NULL); |
| 1038 | if (accept) { |
| 1039 | unsigned i; |
| 1040 | pj_str_t *content_type = NULL; |
| 1041 | |
| 1042 | for (i=0; i<accept->count && !content_type; ++i) { |
| 1043 | int j; |
| 1044 | for (j=0; j<pkg->accept_cnt; ++j) { |
| 1045 | if (pj_stricmp(&accept->values[i], &pkg->accept[j])==0) { |
| 1046 | content_type = &pkg->accept[j]; |
| 1047 | break; |
| 1048 | } |
| 1049 | } |
| 1050 | } |
| 1051 | |
| 1052 | if (!content_type) { |
| 1053 | status = PJSIP_SC_NOT_ACCEPTABLE_HERE; |
| 1054 | goto send_response; |
| 1055 | } |
| 1056 | } |
| 1057 | |
| 1058 | /* Check whether the package wants to accept the subscription. */ |
| 1059 | pj_assert(pkg->cb.on_query_subscribe != NULL); |
| 1060 | (*pkg->cb.on_query_subscribe)(rdata, &status); |
| 1061 | if (!PJSIP_IS_STATUS_IN_CLASS(status,200)) |
| 1062 | goto send_response; |
| 1063 | |
| 1064 | /* Create new subscription record. */ |
| 1065 | pool = pjsip_endpt_create_pool(tsx->endpt, "esub", |
| 1066 | SUB_POOL_SIZE, SUB_POOL_INC); |
| 1067 | if (!pool) { |
| 1068 | status = 500; |
| 1069 | goto send_response; |
| 1070 | } |
| 1071 | sub = pj_pool_calloc(pool, 1, sizeof(*sub)); |
| 1072 | sub->pool = pool; |
| 1073 | sub->mutex = pj_mutex_create(pool, "esub", PJ_MUTEX_RECURSE); |
| 1074 | if (!sub->mutex) { |
| 1075 | status = 500; |
| 1076 | goto send_response; |
| 1077 | } |
| 1078 | |
| 1079 | PJ_LOG(4,(THIS_FILE, "event_sub%p: notifier is created.", sub)); |
| 1080 | |
| 1081 | /* Start locking mutex. */ |
| 1082 | pj_mutex_lock(sub->mutex); |
| 1083 | |
| 1084 | /* Init UAS subscription */ |
| 1085 | sub->endpt = tsx->endpt; |
| 1086 | sub->role = PJSIP_ROLE_UAS; |
| 1087 | sub->state = PJSIP_EVENT_SUB_STATE_PENDING; |
| 1088 | sub->state_str = state[sub->state]; |
| 1089 | pj_list_init(&sub->auth_sess); |
| 1090 | pj_list_init(&sub->route_set); |
| 1091 | sub->from = pjsip_hdr_clone(pool, rdata->to); |
| 1092 | pjsip_fromto_set_from(sub->from); |
| 1093 | if (sub->from->tag.slen == 0) { |
| 1094 | pj_create_unique_string(pool, &sub->from->tag); |
| 1095 | rdata->to->tag = sub->from->tag; |
| 1096 | } |
| 1097 | sub->to = pjsip_hdr_clone(pool, rdata->from); |
| 1098 | pjsip_fromto_set_to(sub->to); |
| 1099 | sub->contact = pjsip_contact_hdr_create(pool); |
| 1100 | sub->contact->uri = sub->from->uri; |
| 1101 | sub->call_id = pjsip_cid_hdr_create(pool); |
| 1102 | pj_strdup(pool, &sub->call_id->id, &rdata->call_id); |
| 1103 | sub->cseq = pj_rand() % 0xFFFF; |
| 1104 | |
| 1105 | expires = pjsip_msg_find_hdr( rdata->msg, PJSIP_H_EXPIRES, NULL); |
| 1106 | if (expires) { |
| 1107 | sub->default_interval = expires->ivalue; |
| 1108 | if (sub->default_interval > 0 && |
| 1109 | sub->default_interval < SECONDS_BEFORE_EXPIRY) |
| 1110 | { |
| 1111 | status = 423; /* Interval too short. */ |
| 1112 | goto send_response; |
| 1113 | } |
| 1114 | } else { |
| 1115 | sub->default_interval = 600; |
| 1116 | } |
| 1117 | |
| 1118 | /* Clone Event header. */ |
| 1119 | sub->event = pjsip_hdr_clone(pool, evhdr); |
| 1120 | |
| 1121 | /* Register to hash table. */ |
| 1122 | create_subscriber_key(&sub->key, pool, PJSIP_ROLE_UAS, &sub->call_id->id, |
| 1123 | &sub->from->tag); |
| 1124 | pj_mutex_lock(mgr.mutex); |
| 1125 | pj_hash_set(pool, mgr.ht, sub->key.ptr, sub->key.slen, sub); |
| 1126 | pj_mutex_unlock(mgr.mutex); |
| 1127 | |
| 1128 | /* Set timer where subscription will expire only when expires<>0. |
| 1129 | * Subscriber may send new subscription with expires==0. |
| 1130 | */ |
| 1131 | if (sub->default_interval != 0) { |
| 1132 | sub_schedule_uas_expire( sub, sub->default_interval-SECONDS_BEFORE_EXPIRY); |
| 1133 | } |
| 1134 | |
| 1135 | /* Notify application. */ |
| 1136 | if (pkg->cb.on_subscribe) { |
| 1137 | pjsip_event_sub_cb *cb = NULL; |
| 1138 | sub->pending_tsx++; |
| 1139 | (*pkg->cb.on_subscribe)(sub, rdata, &cb, &sub->default_interval); |
| 1140 | sub->pending_tsx--; |
| 1141 | if (cb == NULL) |
| 1142 | pj_memset(&sub->cb, 0, sizeof(*cb)); |
| 1143 | else |
| 1144 | pj_memcpy(&sub->cb, cb, sizeof(*cb)); |
| 1145 | } |
| 1146 | |
| 1147 | |
| 1148 | send_response: |
| 1149 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s)(UAS): status=%d", |
| 1150 | sub, state[sub->state].ptr, status)); |
| 1151 | |
| 1152 | tdata = pjsip_endpt_create_response( tsx->endpt, rdata, status); |
| 1153 | if (tdata) { |
| 1154 | if (reason.slen) { |
| 1155 | /* Customize reason text. */ |
| 1156 | tdata->msg->line.status.reason = reason; |
| 1157 | } |
| 1158 | if (PJSIP_IS_STATUS_IN_CLASS(status,200)) { |
| 1159 | /* Add Expires header. */ |
| 1160 | pjsip_expires_hdr *hdr; |
| 1161 | |
| 1162 | hdr = pjsip_expires_hdr_create(tdata->pool); |
| 1163 | hdr->ivalue = sub->default_interval; |
| 1164 | pjsip_msg_add_hdr( tdata->msg, (pjsip_hdr*)hdr ); |
| 1165 | } |
| 1166 | if (status == 423) { |
| 1167 | /* Add Min-Expires header. */ |
| 1168 | pjsip_min_expires_hdr *hdr; |
| 1169 | |
| 1170 | hdr = pjsip_min_expires_hdr_create(tdata->pool); |
| 1171 | hdr->ivalue = SECONDS_BEFORE_EXPIRY; |
| 1172 | pjsip_msg_add_hdr( tdata->msg, (pjsip_hdr*)hdr); |
| 1173 | } |
| 1174 | if (status == 489 || |
| 1175 | status==PJSIP_SC_NOT_ACCEPTABLE_HERE || |
| 1176 | PJSIP_IS_STATUS_IN_CLASS(status,200)) |
| 1177 | { |
| 1178 | /* Add Allow-Events header. */ |
| 1179 | pjsip_hdr *hdr; |
| 1180 | hdr = pjsip_hdr_shallow_clone(tdata->pool, mgr.allow_events); |
| 1181 | pjsip_msg_add_hdr(tdata->msg, hdr); |
| 1182 | |
| 1183 | /* Should add Accept header?. */ |
| 1184 | } |
| 1185 | |
| 1186 | pjsip_tsx_on_tx_msg(tsx, tdata); |
| 1187 | } |
| 1188 | |
| 1189 | /* If received new subscription with expires=0, terminate. */ |
| 1190 | if (sub && sub->default_interval == 0) { |
| 1191 | pj_assert(sub->state == PJSIP_EVENT_SUB_STATE_TERMINATED); |
| 1192 | if (sub->cb.on_sub_terminated) { |
| 1193 | pj_str_t reason = { "timeout", 7 }; |
| 1194 | (*sub->cb.on_sub_terminated)(sub, &reason); |
| 1195 | } |
| 1196 | } |
| 1197 | |
| 1198 | if (!PJSIP_IS_STATUS_IN_CLASS(status,200) || (sub && sub->delete_flag)) { |
| 1199 | if (sub && sub->mutex) { |
| 1200 | pjsip_event_sub_destroy(sub); |
| 1201 | } else if (sub) { |
| 1202 | pjsip_endpt_destroy_pool(tsx->endpt, sub->pool); |
| 1203 | } |
| 1204 | } else { |
| 1205 | pj_assert(status >= 200); |
| 1206 | pj_mutex_unlock(sub->mutex); |
| 1207 | } |
| 1208 | } |
| 1209 | |
| 1210 | /* This is the main callback when SUBSCRIBE request is received. */ |
| 1211 | static void on_subscribe_request(pjsip_transaction *tsx, pjsip_rx_data *rdata) |
| 1212 | { |
| 1213 | pjsip_event_sub *sub = find_sub(rdata); |
| 1214 | |
| 1215 | if (sub) |
| 1216 | on_received_sub_refresh(sub, tsx, rdata); |
| 1217 | else |
| 1218 | on_new_subscription(tsx, rdata); |
| 1219 | } |
| 1220 | |
| 1221 | |
| 1222 | /* This callback is called when response to SUBSCRIBE is received. */ |
| 1223 | static void on_subscribe_response(void *token, pjsip_event *event) |
| 1224 | { |
| 1225 | pjsip_event_sub *sub = token; |
| 1226 | pjsip_transaction *tsx = event->obj.tsx; |
| 1227 | int new_state, old_state = sub->state; |
| 1228 | |
| 1229 | pj_assert(tsx->status_code >= 200); |
| 1230 | if (tsx->status_code < 200) |
| 1231 | return; |
| 1232 | |
| 1233 | pj_assert(sub->role == PJSIP_ROLE_UAC); |
| 1234 | |
| 1235 | /* Lock mutex. */ |
| 1236 | pj_mutex_lock(sub->mutex); |
| 1237 | |
| 1238 | /* If request failed with 401/407 error, silently retry the request. */ |
| 1239 | if (tsx->status_code==401 || tsx->status_code==407) { |
| 1240 | pjsip_tx_data *tdata; |
| 1241 | tdata = pjsip_auth_reinit_req(sub->endpt, |
| 1242 | sub->pool, &sub->auth_sess, |
| 1243 | sub->cred_cnt, sub->cred_info, |
| 1244 | tsx->last_tx, event->src.rdata ); |
| 1245 | if (tdata) { |
| 1246 | int status; |
| 1247 | pjsip_cseq_hdr *cseq; |
| 1248 | cseq = pjsip_msg_find_hdr(tdata->msg, PJSIP_H_CSEQ, NULL); |
| 1249 | cseq->cseq = sub->cseq++; |
| 1250 | status = pjsip_endpt_send_request( sub->endpt, tdata, |
| 1251 | -1, sub, |
| 1252 | &on_subscribe_response); |
| 1253 | if (status == 0) { |
| 1254 | pj_mutex_unlock(sub->mutex); |
| 1255 | return; |
| 1256 | } |
| 1257 | } |
| 1258 | } |
| 1259 | |
| 1260 | if (PJSIP_IS_STATUS_IN_CLASS(tsx->status_code,200)) { |
| 1261 | /* Update To tag. */ |
| 1262 | if (sub->to->tag.slen == 0) |
| 1263 | pj_strdup(sub->pool, &sub->to->tag, &event->src.rdata->to_tag); |
| 1264 | |
| 1265 | new_state = sub->state; |
| 1266 | |
| 1267 | } else if (tsx->status_code == 481) { |
| 1268 | new_state = PJSIP_EVENT_SUB_STATE_TERMINATED; |
| 1269 | |
| 1270 | } else if (tsx->status_code >= 300) { |
| 1271 | /* RFC 3265 Section 3.1.4.2: |
| 1272 | * If a SUBSCRIBE request to refresh a subscription fails |
| 1273 | * with a non-481 response, the original subscription is still |
| 1274 | * considered valid for the duration of original exires. |
| 1275 | * |
| 1276 | * Note: |
| 1277 | * Since we normally send SUBSCRIBE for refreshing the subscription, |
| 1278 | * it means the subscription already expired anyway. So we terminate |
| 1279 | * the subscription now. |
| 1280 | */ |
| 1281 | if (sub->state != PJSIP_EVENT_SUB_STATE_ACTIVE) { |
| 1282 | new_state = PJSIP_EVENT_SUB_STATE_TERMINATED; |
| 1283 | } else { |
| 1284 | /* Use this to be compliant with Section 3.1.4.2 |
| 1285 | new_state = sub->state; |
| 1286 | */ |
| 1287 | new_state = PJSIP_EVENT_SUB_STATE_TERMINATED; |
| 1288 | } |
| 1289 | } else { |
| 1290 | pj_assert(0); |
| 1291 | new_state = sub->state; |
| 1292 | } |
| 1293 | |
| 1294 | if (new_state != sub->state && sub->state != PJSIP_EVENT_SUB_STATE_TERMINATED) { |
| 1295 | sub_set_state(sub, new_state); |
| 1296 | } |
| 1297 | |
| 1298 | if (sub->state == PJSIP_EVENT_SUB_STATE_ACTIVE || |
| 1299 | sub->state == PJSIP_EVENT_SUB_STATE_PENDING) |
| 1300 | { |
| 1301 | /* |
| 1302 | * Register timer for next subscription refresh, but only when |
| 1303 | * we're not unsubscribing. Also update default_interval and Expires |
| 1304 | * header. |
| 1305 | */ |
| 1306 | if (sub->default_interval > 0 && !sub->delete_flag) { |
| 1307 | pjsip_expires_hdr *exp = NULL; |
| 1308 | |
| 1309 | /* Could be transaction timeout. */ |
| 1310 | if (event->src_type == PJSIP_EVENT_RX_MSG) { |
| 1311 | exp = pjsip_msg_find_hdr(event->src.rdata->msg, |
| 1312 | PJSIP_H_EXPIRES, NULL); |
| 1313 | } |
| 1314 | |
| 1315 | if (exp) { |
| 1316 | int delay = exp->ivalue; |
| 1317 | if (delay > 0) { |
| 1318 | pj_time_val new_expiry; |
| 1319 | pj_gettimeofday(&new_expiry); |
| 1320 | new_expiry.sec += delay; |
| 1321 | if (sub->timer.id==0 || |
| 1322 | new_expiry.sec < sub->expiry_time.sec-SECONDS_BEFORE_EXPIRY/2) |
| 1323 | { |
| 1324 | //if (delay > 0 && delay < sub->default_interval) { |
| 1325 | sub->default_interval = delay; |
| 1326 | sub->uac_expires->ivalue = delay; |
| 1327 | update_next_refresh(sub, delay); |
| 1328 | } |
| 1329 | } |
| 1330 | } |
| 1331 | } |
| 1332 | } |
| 1333 | |
| 1334 | /* Call callback. */ |
| 1335 | if (!sub->delete_flag) { |
| 1336 | if (sub->cb.on_received_sub_response) { |
| 1337 | (*sub->cb.on_received_sub_response)(sub, event); |
| 1338 | } |
| 1339 | } |
| 1340 | |
| 1341 | /* Notify application if we're terminated. */ |
| 1342 | if (new_state!=old_state && new_state==PJSIP_EVENT_SUB_STATE_TERMINATED) { |
| 1343 | if (sub->cb.on_sub_terminated) { |
| 1344 | pj_str_t reason; |
| 1345 | if (event->src_type == PJSIP_EVENT_RX_MSG) |
| 1346 | reason = event->src.rdata->msg->line.status.reason; |
| 1347 | else |
| 1348 | reason = *pjsip_get_status_text(tsx->status_code); |
| 1349 | |
| 1350 | (*sub->cb.on_sub_terminated)(sub, &reason); |
| 1351 | } |
| 1352 | } |
| 1353 | |
| 1354 | /* Decrement pending tsx count. */ |
| 1355 | --sub->pending_tsx; |
| 1356 | pj_assert(sub->pending_tsx >= 0); |
| 1357 | |
| 1358 | if (sub->delete_flag && sub->pending_tsx <= 0) { |
| 1359 | pjsip_event_sub_destroy(sub); |
| 1360 | } else { |
| 1361 | pj_mutex_unlock(sub->mutex); |
| 1362 | } |
| 1363 | |
| 1364 | /* DO NOT ACCESS sub FROM NOW ON! IT MIGHT HAVE BEEN DELETED */ |
| 1365 | } |
| 1366 | |
| 1367 | /* |
| 1368 | * This callback called when we receive incoming NOTIFY request. |
| 1369 | */ |
| 1370 | static void on_notify_request(pjsip_transaction *tsx, pjsip_rx_data *rdata) |
| 1371 | { |
| 1372 | pjsip_event_sub *sub; |
| 1373 | pjsip_tx_data *tdata; |
| 1374 | int status = 200; |
| 1375 | int old_state; |
| 1376 | pj_str_t reason = { NULL, 0 }; |
| 1377 | pj_str_t reason_phrase = { NULL, 0 }; |
| 1378 | int new_state = PJSIP_EVENT_SUB_STATE_NULL; |
| 1379 | |
| 1380 | /* Find subscription based on Call-ID and From tag. |
| 1381 | * This will also automatically lock the subscription, if it's found. |
| 1382 | */ |
| 1383 | sub = find_sub(rdata); |
| 1384 | if (!sub) { |
| 1385 | /* RFC 3265: Section 3.2 Description of NOTIFY Behavior: |
| 1386 | * Answer with 481 Subscription does not exist. |
| 1387 | */ |
| 1388 | PJ_LOG(4,(THIS_FILE, "Unable to find subscription for incoming NOTIFY!")); |
| 1389 | status = 481; |
| 1390 | reason_phrase = pj_str("Subscription does not exist"); |
| 1391 | |
| 1392 | } else { |
| 1393 | pj_assert(sub->role == PJSIP_ROLE_UAC); |
| 1394 | PJ_LOG(4,(THIS_FILE, "event_sub%p (%s): received NOTIFY", |
| 1395 | sub, state[sub->state].ptr)); |
| 1396 | |
| 1397 | } |
| 1398 | |
| 1399 | new_state = old_state = sub->state; |
| 1400 | |
| 1401 | /* RFC 3265: Section 3.2.1 |
| 1402 | * Check that the Event header match the subscription. |
| 1403 | */ |
| 1404 | if (status == 200) { |
| 1405 | pjsip_event_hdr *hdr; |
| 1406 | pj_str_t hname = { "Event", 5 }; |
| 1407 | |
| 1408 | hdr = pjsip_msg_find_hdr_by_name(rdata->msg, &hname, NULL); |
| 1409 | if (!hdr) { |
| 1410 | status = PJSIP_SC_BAD_REQUEST; |
| 1411 | reason_phrase = pj_str("No Event header found"); |
| 1412 | } else if (pj_stricmp(&hdr->event_type, &sub->event->event_type) != 0 || |
| 1413 | pj_stricmp(&hdr->id_param, &sub->event->id_param) != 0) |
| 1414 | { |
| 1415 | status = 481; |
| 1416 | reason_phrase = pj_str("Subscription does not exist"); |
| 1417 | } |
| 1418 | } |
| 1419 | |
| 1420 | /* Update subscription state and timer. */ |
| 1421 | if (status == 200) { |
| 1422 | pjsip_sub_state_hdr *hdr; |
| 1423 | const pj_str_t hname = { "Subscription-State", 18 }; |
| 1424 | const pj_str_t state_active = { "active", 6 }, |
| 1425 | state_pending = { "pending", 7}, |
| 1426 | state_terminated = { "terminated", 10 }; |
| 1427 | |
| 1428 | hdr = pjsip_msg_find_hdr_by_name( rdata->msg, &hname, NULL); |
| 1429 | if (!hdr) { |
| 1430 | status = PJSIP_SC_BAD_REQUEST; |
| 1431 | reason_phrase = pj_str("No Subscription-State header found"); |
| 1432 | goto process; |
| 1433 | } |
| 1434 | |
| 1435 | /* |
| 1436 | * Update subscription state. |
| 1437 | */ |
| 1438 | if (pj_stricmp(&hdr->sub_state, &state_active) == 0) { |
| 1439 | if (sub->state != PJSIP_EVENT_SUB_STATE_TERMINATED) |
| 1440 | new_state = PJSIP_EVENT_SUB_STATE_ACTIVE; |
| 1441 | } else if (pj_stricmp(&hdr->sub_state, &state_pending) == 0) { |
| 1442 | if (sub->state != PJSIP_EVENT_SUB_STATE_TERMINATED) |
| 1443 | new_state = PJSIP_EVENT_SUB_STATE_PENDING; |
| 1444 | } else if (pj_stricmp(&hdr->sub_state, &state_terminated) == 0) { |
| 1445 | new_state = PJSIP_EVENT_SUB_STATE_TERMINATED; |
| 1446 | } else { |
| 1447 | new_state = PJSIP_EVENT_SUB_STATE_UNKNOWN; |
| 1448 | } |
| 1449 | |
| 1450 | reason = hdr->reason_param; |
| 1451 | |
| 1452 | if (new_state != sub->state && new_state != PJSIP_EVENT_SUB_STATE_NULL && |
| 1453 | sub->state != PJSIP_EVENT_SUB_STATE_TERMINATED) |
| 1454 | { |
| 1455 | sub_set_state(sub, new_state); |
| 1456 | if (new_state == PJSIP_EVENT_SUB_STATE_UNKNOWN) { |
| 1457 | pj_strdup_with_null(sub->pool, &sub->state_str, &hdr->sub_state); |
| 1458 | } else { |
| 1459 | sub->state_str = state[new_state]; |
| 1460 | } |
| 1461 | } |
| 1462 | |
| 1463 | /* |
| 1464 | * Update timeout timer in required, just in case notifier changed the |
| 1465 | * expiration to shorter time. |
| 1466 | * Section 3.2.2: the expires param can only shorten the interval. |
| 1467 | */ |
| 1468 | if ((sub->state==PJSIP_EVENT_SUB_STATE_ACTIVE || |
| 1469 | sub->state==PJSIP_EVENT_SUB_STATE_PENDING) && hdr->expires_param > 0) |
| 1470 | { |
| 1471 | pj_time_val now, new_expiry; |
| 1472 | |
| 1473 | pj_gettimeofday(&now); |
| 1474 | new_expiry.sec = now.sec + hdr->expires_param; |
| 1475 | if (sub->timer.id==0 || |
| 1476 | new_expiry.sec < sub->expiry_time.sec-SECONDS_BEFORE_EXPIRY/2) |
| 1477 | { |
| 1478 | update_next_refresh(sub, hdr->expires_param); |
| 1479 | } |
| 1480 | } |
| 1481 | } |
| 1482 | |
| 1483 | process: |
| 1484 | /* Note: here we sub MAY BE NULL! */ |
| 1485 | |
| 1486 | /* Send response to NOTIFY */ |
| 1487 | tdata = pjsip_endpt_create_response( tsx->endpt, rdata, status ); |
| 1488 | if (tdata) { |
| 1489 | if (reason_phrase.slen) |
| 1490 | tdata->msg->line.status.reason = reason_phrase; |
| 1491 | |
| 1492 | if (PJSIP_IS_STATUS_IN_CLASS(status,200)) { |
| 1493 | pjsip_hdr *hdr; |
| 1494 | hdr = pjsip_hdr_shallow_clone(tdata->pool, mgr.allow_events); |
| 1495 | pjsip_msg_add_hdr( tdata->msg, hdr); |
| 1496 | } |
| 1497 | |
| 1498 | pjsip_tsx_on_tx_msg(tsx, tdata); |
| 1499 | } |
| 1500 | |
| 1501 | /* Call NOTIFY callback, if any. */ |
| 1502 | if (sub && PJSIP_IS_STATUS_IN_CLASS(status,200) && sub->cb.on_received_notify) { |
| 1503 | sub->pending_tsx++; |
| 1504 | (*sub->cb.on_received_notify)(sub, rdata); |
| 1505 | sub->pending_tsx--; |
| 1506 | } |
| 1507 | |
| 1508 | /* Check if subscription is terminated and call callback. */ |
| 1509 | if (sub && new_state!=old_state && new_state==PJSIP_EVENT_SUB_STATE_TERMINATED) { |
| 1510 | if (sub->cb.on_sub_terminated) { |
| 1511 | sub->pending_tsx++; |
| 1512 | (*sub->cb.on_sub_terminated)(sub, &reason); |
| 1513 | sub->pending_tsx--; |
| 1514 | } |
| 1515 | } |
| 1516 | |
| 1517 | /* Check if application has requested deletion. */ |
| 1518 | if (sub && sub->delete_flag && sub->pending_tsx <= 0) { |
| 1519 | pjsip_event_sub_destroy(sub); |
| 1520 | } else if (sub) { |
| 1521 | pj_mutex_unlock(sub->mutex); |
| 1522 | } |
| 1523 | } |
| 1524 | |
| 1525 | /* This callback is called when we received NOTIFY response. */ |
| 1526 | static void on_notify_response(void *token, pjsip_event *event) |
| 1527 | { |
| 1528 | pjsip_event_sub *sub = token; |
| 1529 | pjsip_event_sub_state old_state = sub->state; |
| 1530 | pjsip_transaction *tsx = event->obj.tsx; |
| 1531 | |
| 1532 | /* Lock the subscription. */ |
| 1533 | pj_mutex_lock(sub->mutex); |
| 1534 | |
| 1535 | pj_assert(sub->role == PJSIP_ROLE_UAS); |
| 1536 | |
| 1537 | /* If request failed with authorization failure, silently retry. */ |
| 1538 | if (tsx->status_code==401 || tsx->status_code==407) { |
| 1539 | pjsip_tx_data *tdata; |
| 1540 | tdata = pjsip_auth_reinit_req(sub->endpt, |
| 1541 | sub->pool, &sub->auth_sess, |
| 1542 | sub->cred_cnt, sub->cred_info, |
| 1543 | tsx->last_tx, event->src.rdata ); |
| 1544 | if (tdata) { |
| 1545 | int status; |
| 1546 | pjsip_cseq_hdr *cseq; |
| 1547 | cseq = pjsip_msg_find_hdr(tdata->msg, PJSIP_H_CSEQ, NULL); |
| 1548 | cseq->cseq = sub->cseq++; |
| 1549 | status = pjsip_endpt_send_request( sub->endpt, tdata, |
| 1550 | -1, sub, |
| 1551 | &on_notify_response); |
| 1552 | if (status == 0) { |
| 1553 | pj_mutex_unlock(sub->mutex); |
| 1554 | return; |
| 1555 | } |
| 1556 | } |
| 1557 | } |
| 1558 | |
| 1559 | /* Notify application. */ |
| 1560 | if (sub->cb.on_received_notify_response) |
| 1561 | (*sub->cb.on_received_notify_response)(sub, event); |
| 1562 | |
| 1563 | /* Check for response 481. */ |
| 1564 | if (event->obj.tsx->status_code == 481) { |
| 1565 | /* Remote says that the subscription does not exist! |
| 1566 | * Terminate subscription! |
| 1567 | */ |
| 1568 | sub_set_state(sub, PJSIP_EVENT_SUB_STATE_TERMINATED); |
| 1569 | if (sub->timer.id) { |
| 1570 | pjsip_endpt_cancel_timer(sub->endpt, &sub->timer); |
| 1571 | sub->timer.id = 0; |
| 1572 | } |
| 1573 | |
| 1574 | PJ_LOG(4, (THIS_FILE, |
| 1575 | "event_sub%p (%s): got 481 response to NOTIFY. Terminating...", |
| 1576 | sub, state[sub->state].ptr)); |
| 1577 | |
| 1578 | /* Notify app. */ |
| 1579 | if (sub->state!=old_state && sub->cb.on_sub_terminated) |
| 1580 | (*sub->cb.on_sub_terminated)(sub, &event->src.rdata->msg->line.status.reason); |
| 1581 | } |
| 1582 | |
| 1583 | /* Decrement pending transaction count. */ |
| 1584 | --sub->pending_tsx; |
| 1585 | pj_assert(sub->pending_tsx >= 0); |
| 1586 | |
| 1587 | /* Check that the subscription is marked for deletion. */ |
| 1588 | if (sub->delete_flag && sub->pending_tsx <= 0) { |
| 1589 | pjsip_event_sub_destroy(sub); |
| 1590 | } else { |
| 1591 | pj_mutex_unlock(sub->mutex); |
| 1592 | } |
| 1593 | |
| 1594 | /* DO NOT ACCESS sub, IT MIGHT HAVE BEEN DESTROYED! */ |
| 1595 | } |
| 1596 | |
| 1597 | |
| 1598 | /* This is the transaction handler for incoming SUBSCRIBE and NOTIFY |
| 1599 | * requests. |
| 1600 | */ |
| 1601 | static void tsx_handler( struct pjsip_module *mod, pjsip_event *event ) |
| 1602 | { |
| 1603 | pjsip_msg *msg; |
| 1604 | pjsip_rx_data *rdata; |
| 1605 | |
| 1606 | /* Only want incoming message events. */ |
| 1607 | if (event->src_type != PJSIP_EVENT_RX_MSG) |
| 1608 | return; |
| 1609 | |
| 1610 | rdata = event->src.rdata; |
| 1611 | msg = rdata->msg; |
| 1612 | |
| 1613 | /* Only want to process request messages. */ |
| 1614 | if (msg->type != PJSIP_REQUEST_MSG) |
| 1615 | return; |
| 1616 | |
| 1617 | /* Only want the first notification. */ |
| 1618 | if (event->obj.tsx && event->obj.tsx->status_code >= 100) |
| 1619 | return; |
| 1620 | |
| 1621 | if (pjsip_method_cmp(&msg->line.req.method, &SUBSCRIBE)==0) { |
| 1622 | /* Process incoming SUBSCRIBE request. */ |
| 1623 | on_subscribe_request( event->obj.tsx, rdata ); |
| 1624 | } else if (pjsip_method_cmp(&msg->line.req.method, &NOTIFY)==0) { |
| 1625 | /* Process incoming NOTIFY request. */ |
| 1626 | on_notify_request( event->obj.tsx, rdata ); |
| 1627 | } |
| 1628 | } |
| 1629 | |