Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #include <pjsip/sip_transport.h> |
| 21 | #include <pjsip/sip_endpoint.h> |
| 22 | #include <pjsip/sip_parser.h> |
| 23 | #include <pjsip/sip_msg.h> |
| 24 | #include <pjsip/sip_private.h> |
| 25 | #include <pjsip/sip_errno.h> |
| 26 | #include <pjsip/sip_module.h> |
| 27 | #include <pj/addr_resolv.h> |
| 28 | #include <pj/except.h> |
| 29 | #include <pj/os.h> |
| 30 | #include <pj/log.h> |
| 31 | #include <pj/ioqueue.h> |
| 32 | #include <pj/hash.h> |
| 33 | #include <pj/string.h> |
| 34 | #include <pj/pool.h> |
| 35 | #include <pj/assert.h> |
| 36 | #include <pj/lock.h> |
| 37 | #include <pj/list.h> |
| 38 | |
| 39 | |
| 40 | #define THIS_FILE "sip_transport.c" |
| 41 | |
| 42 | #if 0 |
| 43 | # define TRACE_(x) PJ_LOG(5,x) |
| 44 | |
| 45 | static const char *addr_string(const pj_sockaddr_t *addr) |
| 46 | { |
| 47 | static char str[PJ_INET6_ADDRSTRLEN]; |
| 48 | pj_inet_ntop(((const pj_sockaddr*)addr)->addr.sa_family, |
| 49 | pj_sockaddr_get_addr(addr), |
| 50 | str, sizeof(str)); |
| 51 | return str; |
| 52 | } |
| 53 | #else |
| 54 | # define TRACE_(x) |
| 55 | #endif |
| 56 | |
| 57 | /* Prototype. */ |
| 58 | static pj_status_t mod_on_tx_msg(pjsip_tx_data *tdata); |
| 59 | |
| 60 | /* This module has sole purpose to print transmit data to contigous buffer |
| 61 | * before actually transmitted to the wire. |
| 62 | */ |
| 63 | static pjsip_module mod_msg_print = |
| 64 | { |
| 65 | NULL, NULL, /* prev and next */ |
| 66 | { "mod-msg-print", 13}, /* Name. */ |
| 67 | -1, /* Id */ |
| 68 | PJSIP_MOD_PRIORITY_TRANSPORT_LAYER, /* Priority */ |
| 69 | NULL, /* load() */ |
| 70 | NULL, /* start() */ |
| 71 | NULL, /* stop() */ |
| 72 | NULL, /* unload() */ |
| 73 | NULL, /* on_rx_request() */ |
| 74 | NULL, /* on_rx_response() */ |
| 75 | &mod_on_tx_msg, /* on_tx_request() */ |
| 76 | &mod_on_tx_msg, /* on_tx_response() */ |
| 77 | NULL, /* on_tsx_state() */ |
| 78 | }; |
| 79 | |
| 80 | /* |
| 81 | * Transport manager. |
| 82 | */ |
| 83 | struct pjsip_tpmgr |
| 84 | { |
| 85 | pj_hash_table_t *table; |
| 86 | pj_lock_t *lock; |
| 87 | pjsip_endpoint *endpt; |
| 88 | pjsip_tpfactory factory_list; |
| 89 | #if defined(PJ_DEBUG) && PJ_DEBUG!=0 |
| 90 | pj_atomic_t *tdata_counter; |
| 91 | #endif |
| 92 | void (*on_rx_msg)(pjsip_endpoint*, pj_status_t, pjsip_rx_data*); |
| 93 | pj_status_t (*on_tx_msg)(pjsip_endpoint*, pjsip_tx_data*); |
| 94 | pjsip_tp_state_callback tp_state_cb; |
| 95 | |
| 96 | /* Transmit data list, for transmit data cleanup when transport manager |
| 97 | * is destroyed. |
| 98 | */ |
| 99 | pjsip_tx_data tdata_list; |
| 100 | }; |
| 101 | |
| 102 | |
| 103 | /* Transport state listener list type */ |
| 104 | typedef struct tp_state_listener |
| 105 | { |
| 106 | PJ_DECL_LIST_MEMBER(struct tp_state_listener); |
| 107 | |
| 108 | pjsip_tp_state_callback cb; |
| 109 | void *user_data; |
| 110 | } tp_state_listener; |
| 111 | |
| 112 | |
| 113 | /* |
| 114 | * Transport data. |
| 115 | */ |
| 116 | typedef struct transport_data |
| 117 | { |
| 118 | /* Transport listeners */ |
| 119 | tp_state_listener st_listeners; |
| 120 | tp_state_listener st_listeners_empty; |
| 121 | } transport_data; |
| 122 | |
| 123 | |
| 124 | /***************************************************************************** |
| 125 | * |
| 126 | * GENERAL TRANSPORT (NAMES, TYPES, ETC.) |
| 127 | * |
| 128 | *****************************************************************************/ |
| 129 | |
| 130 | /* |
| 131 | * Transport names. |
| 132 | */ |
| 133 | struct transport_names_t |
| 134 | { |
| 135 | pjsip_transport_type_e type; /* Transport type */ |
| 136 | pj_uint16_t port; /* Default port number */ |
| 137 | pj_str_t name; /* Id tag */ |
| 138 | const char *description; /* Longer description */ |
| 139 | unsigned flag; /* Flags */ |
| 140 | char name_buf[16]; /* For user's transport */ |
| 141 | } transport_names[16] = |
| 142 | { |
| 143 | { |
| 144 | PJSIP_TRANSPORT_UNSPECIFIED, |
| 145 | 0, |
| 146 | {"Unspecified", 11}, |
| 147 | "Unspecified", |
| 148 | 0 |
| 149 | }, |
| 150 | { |
| 151 | PJSIP_TRANSPORT_UDP, |
| 152 | 5060, |
| 153 | {"UDP", 3}, |
| 154 | "UDP transport", |
| 155 | PJSIP_TRANSPORT_DATAGRAM |
| 156 | }, |
| 157 | { |
| 158 | PJSIP_TRANSPORT_TCP, |
| 159 | 5060, |
| 160 | {"TCP", 3}, |
| 161 | "TCP transport", |
| 162 | PJSIP_TRANSPORT_RELIABLE |
| 163 | }, |
| 164 | { |
| 165 | PJSIP_TRANSPORT_TLS, |
| 166 | 5061, |
| 167 | {"TLS", 3}, |
| 168 | "TLS transport", |
| 169 | PJSIP_TRANSPORT_RELIABLE | PJSIP_TRANSPORT_SECURE |
| 170 | }, |
| 171 | { |
| 172 | PJSIP_TRANSPORT_SCTP, |
| 173 | 5060, |
| 174 | {"SCTP", 4}, |
| 175 | "SCTP transport", |
| 176 | PJSIP_TRANSPORT_RELIABLE |
| 177 | }, |
| 178 | { |
| 179 | PJSIP_TRANSPORT_LOOP, |
| 180 | 15060, |
| 181 | {"LOOP", 4}, |
| 182 | "Loopback transport", |
| 183 | PJSIP_TRANSPORT_RELIABLE |
| 184 | }, |
| 185 | { |
| 186 | PJSIP_TRANSPORT_LOOP_DGRAM, |
| 187 | 15060, |
| 188 | {"LOOP-DGRAM", 10}, |
| 189 | "Loopback datagram transport", |
| 190 | PJSIP_TRANSPORT_DATAGRAM |
| 191 | }, |
| 192 | { |
| 193 | PJSIP_TRANSPORT_UDP6, |
| 194 | 5060, |
| 195 | {"UDP", 3}, |
| 196 | "UDP IPv6 transport", |
| 197 | PJSIP_TRANSPORT_DATAGRAM |
| 198 | }, |
| 199 | { |
| 200 | PJSIP_TRANSPORT_TCP6, |
| 201 | 5060, |
| 202 | {"TCP", 3}, |
| 203 | "TCP IPv6 transport", |
| 204 | PJSIP_TRANSPORT_RELIABLE |
| 205 | }, |
| 206 | { |
| 207 | PJSIP_TRANSPORT_TLS6, |
| 208 | 5061, |
| 209 | {"TLS", 3}, |
| 210 | "TLS IPv6 transport", |
| 211 | PJSIP_TRANSPORT_RELIABLE | PJSIP_TRANSPORT_SECURE |
| 212 | }, |
| 213 | }; |
| 214 | |
| 215 | static void tp_state_callback(pjsip_transport *tp, |
| 216 | pjsip_transport_state state, |
| 217 | const pjsip_transport_state_info *info); |
| 218 | |
| 219 | |
| 220 | struct transport_names_t *get_tpname(pjsip_transport_type_e type) |
| 221 | { |
| 222 | unsigned i; |
| 223 | for (i=0; i<PJ_ARRAY_SIZE(transport_names); ++i) { |
| 224 | if (transport_names[i].type == type) |
| 225 | return &transport_names[i]; |
| 226 | } |
| 227 | pj_assert(!"Invalid transport type!"); |
| 228 | return NULL; |
| 229 | } |
| 230 | |
| 231 | |
| 232 | |
| 233 | /* |
| 234 | * Register new transport type to PJSIP. |
| 235 | */ |
| 236 | PJ_DEF(pj_status_t) pjsip_transport_register_type( unsigned tp_flag, |
| 237 | const char *tp_name, |
| 238 | int def_port, |
| 239 | int *p_tp_type) |
| 240 | { |
| 241 | unsigned i; |
| 242 | |
| 243 | PJ_ASSERT_RETURN(tp_flag && tp_name && def_port, PJ_EINVAL); |
| 244 | PJ_ASSERT_RETURN(pj_ansi_strlen(tp_name) < |
| 245 | PJ_ARRAY_SIZE(transport_names[0].name_buf), |
| 246 | PJ_ENAMETOOLONG); |
| 247 | |
| 248 | for (i=1; i<PJ_ARRAY_SIZE(transport_names); ++i) { |
| 249 | if (transport_names[i].type == 0) |
| 250 | break; |
| 251 | } |
| 252 | |
| 253 | if (i == PJ_ARRAY_SIZE(transport_names)) |
| 254 | return PJ_ETOOMANY; |
| 255 | |
| 256 | transport_names[i].type = (pjsip_transport_type_e)i; |
| 257 | transport_names[i].port = (pj_uint16_t)def_port; |
| 258 | pj_ansi_strcpy(transport_names[i].name_buf, tp_name); |
| 259 | transport_names[i].name = pj_str(transport_names[i].name_buf); |
| 260 | transport_names[i].flag = tp_flag; |
| 261 | |
| 262 | if (p_tp_type) |
| 263 | *p_tp_type = i; |
| 264 | |
| 265 | return PJ_SUCCESS; |
| 266 | } |
| 267 | |
| 268 | |
| 269 | /* |
| 270 | * Get transport type from name. |
| 271 | */ |
| 272 | PJ_DEF(pjsip_transport_type_e) pjsip_transport_get_type_from_name(const pj_str_t *name) |
| 273 | { |
| 274 | unsigned i; |
| 275 | |
| 276 | if (name->slen == 0) |
| 277 | return PJSIP_TRANSPORT_UNSPECIFIED; |
| 278 | |
| 279 | /* Get transport type from name. */ |
| 280 | for (i=0; i<PJ_ARRAY_SIZE(transport_names); ++i) { |
| 281 | if (pj_stricmp(name, &transport_names[i].name) == 0) { |
| 282 | return transport_names[i].type; |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | pj_assert(!"Invalid transport name"); |
| 287 | return PJSIP_TRANSPORT_UNSPECIFIED; |
| 288 | } |
| 289 | |
| 290 | |
| 291 | /* |
| 292 | * Get the transport type for the specified flags. |
| 293 | */ |
| 294 | PJ_DEF(pjsip_transport_type_e) pjsip_transport_get_type_from_flag(unsigned flag) |
| 295 | { |
| 296 | unsigned i; |
| 297 | |
| 298 | /* Get the transport type for the specified flags. */ |
| 299 | for (i=0; i<PJ_ARRAY_SIZE(transport_names); ++i) { |
| 300 | if (transport_names[i].flag == flag) { |
| 301 | return transport_names[i].type; |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | pj_assert(!"Invalid transport type"); |
| 306 | return PJSIP_TRANSPORT_UNSPECIFIED; |
| 307 | } |
| 308 | |
| 309 | /* |
| 310 | * Get the socket address family of a given transport type. |
| 311 | */ |
| 312 | PJ_DEF(int) pjsip_transport_type_get_af(pjsip_transport_type_e type) |
| 313 | { |
| 314 | if (type & PJSIP_TRANSPORT_IPV6) |
| 315 | return pj_AF_INET6(); |
| 316 | else |
| 317 | return pj_AF_INET(); |
| 318 | } |
| 319 | |
| 320 | PJ_DEF(unsigned) pjsip_transport_get_flag_from_type(pjsip_transport_type_e type) |
| 321 | { |
| 322 | /* Return transport flag. */ |
| 323 | return get_tpname(type)->flag; |
| 324 | } |
| 325 | |
| 326 | /* |
| 327 | * Get the default SIP port number for the specified type. |
| 328 | */ |
| 329 | PJ_DEF(int) pjsip_transport_get_default_port_for_type(pjsip_transport_type_e type) |
| 330 | { |
| 331 | /* Return the port. */ |
| 332 | return get_tpname(type)->port; |
| 333 | } |
| 334 | |
| 335 | /* |
| 336 | * Get transport name. |
| 337 | */ |
| 338 | PJ_DEF(const char*) pjsip_transport_get_type_name(pjsip_transport_type_e type) |
| 339 | { |
| 340 | /* Return the name. */ |
| 341 | return get_tpname(type)->name.ptr; |
| 342 | } |
| 343 | |
| 344 | /* |
| 345 | * Get transport description. |
| 346 | */ |
| 347 | PJ_DEF(const char*) pjsip_transport_get_type_desc(pjsip_transport_type_e type) |
| 348 | { |
| 349 | /* Return the description. */ |
| 350 | return get_tpname(type)->description; |
| 351 | } |
| 352 | |
| 353 | |
| 354 | /***************************************************************************** |
| 355 | * |
| 356 | * TRANSPORT SELECTOR |
| 357 | * |
| 358 | *****************************************************************************/ |
| 359 | |
| 360 | /* |
| 361 | * Add transport/listener reference in the selector. |
| 362 | */ |
| 363 | PJ_DEF(void) pjsip_tpselector_add_ref(pjsip_tpselector *sel) |
| 364 | { |
| 365 | if (sel->type == PJSIP_TPSELECTOR_TRANSPORT && sel->u.transport != NULL) |
| 366 | pjsip_transport_add_ref(sel->u.transport); |
| 367 | else if (sel->type == PJSIP_TPSELECTOR_LISTENER && sel->u.listener != NULL) |
| 368 | ; /* Hmm.. looks like we don't have reference counter for listener */ |
| 369 | } |
| 370 | |
| 371 | |
| 372 | /* |
| 373 | * Decrement transport/listener reference in the selector. |
| 374 | */ |
| 375 | PJ_DEF(void) pjsip_tpselector_dec_ref(pjsip_tpselector *sel) |
| 376 | { |
| 377 | if (sel->type == PJSIP_TPSELECTOR_TRANSPORT && sel->u.transport != NULL) |
| 378 | pjsip_transport_dec_ref(sel->u.transport); |
| 379 | else if (sel->type == PJSIP_TPSELECTOR_LISTENER && sel->u.listener != NULL) |
| 380 | ; /* Hmm.. looks like we don't have reference counter for listener */ |
| 381 | } |
| 382 | |
| 383 | |
| 384 | /***************************************************************************** |
| 385 | * |
| 386 | * TRANSMIT DATA BUFFER MANIPULATION. |
| 387 | * |
| 388 | *****************************************************************************/ |
| 389 | |
| 390 | /* |
| 391 | * Create new transmit buffer. |
| 392 | */ |
| 393 | PJ_DEF(pj_status_t) pjsip_tx_data_create( pjsip_tpmgr *mgr, |
| 394 | pjsip_tx_data **p_tdata ) |
| 395 | { |
| 396 | pj_pool_t *pool; |
| 397 | pjsip_tx_data *tdata; |
| 398 | pj_status_t status; |
| 399 | |
| 400 | PJ_ASSERT_RETURN(mgr && p_tdata, PJ_EINVAL); |
| 401 | |
| 402 | pool = pjsip_endpt_create_pool( mgr->endpt, "tdta%p", |
| 403 | PJSIP_POOL_LEN_TDATA, |
| 404 | PJSIP_POOL_INC_TDATA ); |
| 405 | if (!pool) |
| 406 | return PJ_ENOMEM; |
| 407 | |
| 408 | tdata = PJ_POOL_ZALLOC_T(pool, pjsip_tx_data); |
| 409 | tdata->pool = pool; |
| 410 | tdata->mgr = mgr; |
| 411 | pj_memcpy(tdata->obj_name, pool->obj_name, PJ_MAX_OBJ_NAME); |
| 412 | |
| 413 | status = pj_atomic_create(tdata->pool, 0, &tdata->ref_cnt); |
| 414 | if (status != PJ_SUCCESS) { |
| 415 | pjsip_endpt_release_pool( mgr->endpt, tdata->pool ); |
| 416 | return status; |
| 417 | } |
| 418 | |
| 419 | //status = pj_lock_create_simple_mutex(pool, "tdta%p", &tdata->lock); |
| 420 | status = pj_lock_create_null_mutex(pool, "tdta%p", &tdata->lock); |
| 421 | if (status != PJ_SUCCESS) { |
| 422 | pjsip_endpt_release_pool( mgr->endpt, tdata->pool ); |
| 423 | return status; |
| 424 | } |
| 425 | |
| 426 | pj_ioqueue_op_key_init(&tdata->op_key.key, sizeof(tdata->op_key.key)); |
| 427 | pj_list_init(tdata); |
| 428 | |
| 429 | #if defined(PJSIP_HAS_TX_DATA_LIST) && PJSIP_HAS_TX_DATA_LIST!=0 |
| 430 | /* Append this just created tdata to transmit buffer list */ |
| 431 | pj_lock_acquire(mgr->lock); |
| 432 | pj_list_push_back(&mgr->tdata_list, tdata); |
| 433 | pj_lock_release(mgr->lock); |
| 434 | #endif |
| 435 | |
| 436 | #if defined(PJ_DEBUG) && PJ_DEBUG!=0 |
| 437 | pj_atomic_inc( tdata->mgr->tdata_counter ); |
| 438 | #endif |
| 439 | |
| 440 | *p_tdata = tdata; |
| 441 | return PJ_SUCCESS; |
| 442 | } |
| 443 | |
| 444 | |
| 445 | /* |
| 446 | * Add reference to tx buffer. |
| 447 | */ |
| 448 | PJ_DEF(void) pjsip_tx_data_add_ref( pjsip_tx_data *tdata ) |
| 449 | { |
| 450 | pj_atomic_inc(tdata->ref_cnt); |
| 451 | } |
| 452 | |
| 453 | static void tx_data_destroy(pjsip_tx_data *tdata) |
| 454 | { |
| 455 | PJ_LOG(5,(tdata->obj_name, "Destroying txdata %s", |
| 456 | pjsip_tx_data_get_info(tdata))); |
| 457 | pjsip_tpselector_dec_ref(&tdata->tp_sel); |
| 458 | #if defined(PJ_DEBUG) && PJ_DEBUG!=0 |
| 459 | pj_atomic_dec( tdata->mgr->tdata_counter ); |
| 460 | #endif |
| 461 | |
| 462 | #if defined(PJSIP_HAS_TX_DATA_LIST) && PJSIP_HAS_TX_DATA_LIST!=0 |
| 463 | /* Remove this tdata from transmit buffer list */ |
| 464 | pj_lock_acquire(tdata->mgr->lock); |
| 465 | pj_list_erase(tdata); |
| 466 | pj_lock_release(tdata->mgr->lock); |
| 467 | #endif |
| 468 | |
| 469 | pj_atomic_destroy( tdata->ref_cnt ); |
| 470 | pj_lock_destroy( tdata->lock ); |
| 471 | pjsip_endpt_release_pool( tdata->mgr->endpt, tdata->pool ); |
| 472 | } |
| 473 | |
| 474 | /* |
| 475 | * Decrease transport data reference, destroy it when the reference count |
| 476 | * reaches zero. |
| 477 | */ |
| 478 | PJ_DEF(pj_status_t) pjsip_tx_data_dec_ref( pjsip_tx_data *tdata ) |
| 479 | { |
| 480 | pj_assert( pj_atomic_get(tdata->ref_cnt) > 0); |
| 481 | if (pj_atomic_dec_and_get(tdata->ref_cnt) <= 0) { |
| 482 | tx_data_destroy(tdata); |
| 483 | return PJSIP_EBUFDESTROYED; |
| 484 | } else { |
| 485 | return PJ_SUCCESS; |
| 486 | } |
| 487 | } |
| 488 | |
| 489 | /* |
| 490 | * Invalidate the content of the print buffer to force the message to be |
| 491 | * re-printed when sent. |
| 492 | */ |
| 493 | PJ_DEF(void) pjsip_tx_data_invalidate_msg( pjsip_tx_data *tdata ) |
| 494 | { |
| 495 | tdata->buf.cur = tdata->buf.start; |
| 496 | tdata->info = NULL; |
| 497 | } |
| 498 | |
| 499 | /* |
| 500 | * Print the SIP message to transmit data buffer's internal buffer. |
| 501 | */ |
| 502 | PJ_DEF(pj_status_t) pjsip_tx_data_encode(pjsip_tx_data *tdata) |
| 503 | { |
| 504 | /* Allocate buffer if necessary. */ |
| 505 | if (tdata->buf.start == NULL) { |
| 506 | PJ_USE_EXCEPTION; |
| 507 | |
| 508 | PJ_TRY { |
| 509 | tdata->buf.start = (char*) |
| 510 | pj_pool_alloc(tdata->pool, PJSIP_MAX_PKT_LEN); |
| 511 | } |
| 512 | PJ_CATCH_ANY { |
| 513 | return PJ_ENOMEM; |
| 514 | } |
| 515 | PJ_END |
| 516 | |
| 517 | tdata->buf.cur = tdata->buf.start; |
| 518 | tdata->buf.end = tdata->buf.start + PJSIP_MAX_PKT_LEN; |
| 519 | } |
| 520 | |
| 521 | /* Do we need to reprint? */ |
| 522 | if (!pjsip_tx_data_is_valid(tdata)) { |
| 523 | pj_ssize_t size; |
| 524 | |
| 525 | size = pjsip_msg_print( tdata->msg, tdata->buf.start, |
| 526 | tdata->buf.end - tdata->buf.start); |
| 527 | if (size < 0) { |
| 528 | return PJSIP_EMSGTOOLONG; |
| 529 | } |
| 530 | pj_assert(size != 0); |
| 531 | tdata->buf.cur[size] = '\0'; |
| 532 | tdata->buf.cur += size; |
| 533 | } |
| 534 | |
| 535 | return PJ_SUCCESS; |
| 536 | } |
| 537 | |
| 538 | PJ_DEF(pj_bool_t) pjsip_tx_data_is_valid( pjsip_tx_data *tdata ) |
| 539 | { |
| 540 | return tdata->buf.cur != tdata->buf.start; |
| 541 | } |
| 542 | |
| 543 | static char *get_msg_info(pj_pool_t *pool, const char *obj_name, |
| 544 | const pjsip_msg *msg) |
| 545 | { |
| 546 | char info_buf[128], *info; |
| 547 | const pjsip_cseq_hdr *cseq; |
| 548 | int len; |
| 549 | |
| 550 | cseq = (const pjsip_cseq_hdr*) pjsip_msg_find_hdr(msg, PJSIP_H_CSEQ, NULL); |
| 551 | PJ_ASSERT_RETURN(cseq != NULL, "INVALID MSG"); |
| 552 | |
| 553 | if (msg->type == PJSIP_REQUEST_MSG) { |
| 554 | len = pj_ansi_snprintf(info_buf, sizeof(info_buf), |
| 555 | "Request msg %.*s/cseq=%d (%s)", |
| 556 | (int)msg->line.req.method.name.slen, |
| 557 | msg->line.req.method.name.ptr, |
| 558 | cseq->cseq, obj_name); |
| 559 | } else { |
| 560 | len = pj_ansi_snprintf(info_buf, sizeof(info_buf), |
| 561 | "Response msg %d/%.*s/cseq=%d (%s)", |
| 562 | msg->line.status.code, |
| 563 | (int)cseq->method.name.slen, |
| 564 | cseq->method.name.ptr, |
| 565 | cseq->cseq, obj_name); |
| 566 | } |
| 567 | |
| 568 | if (len < 1 || len >= (int)sizeof(info_buf)) { |
| 569 | return (char*)obj_name; |
| 570 | } |
| 571 | |
| 572 | info = (char*) pj_pool_alloc(pool, len+1); |
| 573 | pj_memcpy(info, info_buf, len+1); |
| 574 | |
| 575 | return info; |
| 576 | } |
| 577 | |
| 578 | PJ_DEF(char*) pjsip_tx_data_get_info( pjsip_tx_data *tdata ) |
| 579 | { |
| 580 | PJ_ASSERT_RETURN(tdata, "NULL"); |
| 581 | |
| 582 | /* tdata->info may be assigned by application so if it exists |
| 583 | * just return it. |
| 584 | */ |
| 585 | if (tdata->info) |
| 586 | return tdata->info; |
| 587 | |
| 588 | if (tdata->msg==NULL) |
| 589 | return "NULL"; |
| 590 | |
| 591 | pj_lock_acquire(tdata->lock); |
| 592 | tdata->info = get_msg_info(tdata->pool, tdata->obj_name, tdata->msg); |
| 593 | pj_lock_release(tdata->lock); |
| 594 | |
| 595 | return tdata->info; |
| 596 | } |
| 597 | |
| 598 | PJ_DEF(pj_status_t) pjsip_tx_data_set_transport(pjsip_tx_data *tdata, |
| 599 | const pjsip_tpselector *sel) |
| 600 | { |
| 601 | PJ_ASSERT_RETURN(tdata && sel, PJ_EINVAL); |
| 602 | |
| 603 | pj_lock_acquire(tdata->lock); |
| 604 | |
| 605 | pjsip_tpselector_dec_ref(&tdata->tp_sel); |
| 606 | |
| 607 | pj_memcpy(&tdata->tp_sel, sel, sizeof(*sel)); |
| 608 | pjsip_tpselector_add_ref(&tdata->tp_sel); |
| 609 | |
| 610 | pj_lock_release(tdata->lock); |
| 611 | |
| 612 | return PJ_SUCCESS; |
| 613 | } |
| 614 | |
| 615 | |
| 616 | PJ_DEF(char*) pjsip_rx_data_get_info(pjsip_rx_data *rdata) |
| 617 | { |
| 618 | char obj_name[PJ_MAX_OBJ_NAME]; |
| 619 | |
| 620 | PJ_ASSERT_RETURN(rdata->msg_info.msg, "INVALID MSG"); |
| 621 | |
| 622 | if (rdata->msg_info.info) |
| 623 | return rdata->msg_info.info; |
| 624 | |
| 625 | pj_ansi_strcpy(obj_name, "rdata"); |
| 626 | pj_ansi_snprintf(obj_name+5, sizeof(obj_name)-5, "%p", rdata); |
| 627 | |
| 628 | rdata->msg_info.info = get_msg_info(rdata->tp_info.pool, obj_name, |
| 629 | rdata->msg_info.msg); |
| 630 | return rdata->msg_info.info; |
| 631 | } |
| 632 | |
| 633 | /* Clone pjsip_rx_data. */ |
| 634 | PJ_DEF(pj_status_t) pjsip_rx_data_clone( const pjsip_rx_data *src, |
| 635 | unsigned flags, |
| 636 | pjsip_rx_data **p_rdata) |
| 637 | { |
| 638 | pj_pool_t *pool; |
| 639 | pjsip_rx_data *dst; |
| 640 | pjsip_hdr *hdr; |
| 641 | |
| 642 | PJ_ASSERT_RETURN(src && flags==0 && p_rdata, PJ_EINVAL); |
| 643 | |
| 644 | pool = pj_pool_create(src->tp_info.pool->factory, |
| 645 | "rtd%p", |
| 646 | PJSIP_POOL_RDATA_LEN, |
| 647 | PJSIP_POOL_RDATA_INC, |
| 648 | NULL); |
| 649 | if (!pool) |
| 650 | return PJ_ENOMEM; |
| 651 | |
| 652 | dst = PJ_POOL_ZALLOC_T(pool, pjsip_rx_data); |
| 653 | |
| 654 | /* Parts of tp_info */ |
| 655 | dst->tp_info.pool = pool; |
| 656 | dst->tp_info.transport = (pjsip_transport*)src->tp_info.transport; |
| 657 | |
| 658 | /* pkt_info can be memcopied */ |
| 659 | pj_memcpy(&dst->pkt_info, &src->pkt_info, sizeof(src->pkt_info)); |
| 660 | |
| 661 | /* msg_info needs deep clone */ |
| 662 | dst->msg_info.msg_buf = dst->pkt_info.packet; |
| 663 | dst->msg_info.len = src->msg_info.len; |
| 664 | dst->msg_info.msg = pjsip_msg_clone(pool, src->msg_info.msg); |
| 665 | pj_list_init(&dst->msg_info.parse_err); |
| 666 | |
| 667 | #define GET_MSG_HDR2(TYPE, type, var) \ |
| 668 | case PJSIP_H_##TYPE: \ |
| 669 | if (!dst->msg_info.var) { \ |
| 670 | dst->msg_info.var = (pjsip_##type##_hdr*)hdr; \ |
| 671 | } \ |
| 672 | break |
| 673 | #define GET_MSG_HDR(TYPE, var_type) GET_MSG_HDR2(TYPE, var_type, var_type) |
| 674 | |
| 675 | hdr = dst->msg_info.msg->hdr.next; |
| 676 | while (hdr != &dst->msg_info.msg->hdr) { |
| 677 | switch (hdr->type) { |
| 678 | GET_MSG_HDR(CALL_ID, cid); |
| 679 | GET_MSG_HDR(FROM, from); |
| 680 | GET_MSG_HDR(TO, to); |
| 681 | GET_MSG_HDR(VIA, via); |
| 682 | GET_MSG_HDR(CSEQ, cseq); |
| 683 | GET_MSG_HDR(MAX_FORWARDS, max_fwd); |
| 684 | GET_MSG_HDR(ROUTE, route); |
| 685 | GET_MSG_HDR2(RECORD_ROUTE, rr, record_route); |
| 686 | GET_MSG_HDR(CONTENT_TYPE, ctype); |
| 687 | GET_MSG_HDR(CONTENT_LENGTH, clen); |
| 688 | GET_MSG_HDR(REQUIRE, require); |
| 689 | GET_MSG_HDR(SUPPORTED, supported); |
| 690 | default: |
| 691 | break; |
| 692 | } |
| 693 | hdr = hdr->next; |
| 694 | } |
| 695 | |
| 696 | #undef GET_MSG_HDR |
| 697 | #undef GET_MSG_HDR2 |
| 698 | |
| 699 | *p_rdata = dst; |
| 700 | |
| 701 | /* Finally add transport ref */ |
| 702 | return pjsip_transport_add_ref(dst->tp_info.transport); |
| 703 | } |
| 704 | |
| 705 | /* Free previously cloned pjsip_rx_data. */ |
| 706 | PJ_DEF(pj_status_t) pjsip_rx_data_free_cloned(pjsip_rx_data *rdata) |
| 707 | { |
| 708 | PJ_ASSERT_RETURN(rdata, PJ_EINVAL); |
| 709 | |
| 710 | pjsip_transport_dec_ref(rdata->tp_info.transport); |
| 711 | pj_pool_release(rdata->tp_info.pool); |
| 712 | |
| 713 | return PJ_SUCCESS; |
| 714 | } |
| 715 | |
| 716 | /***************************************************************************** |
| 717 | * |
| 718 | * TRANSPORT KEY |
| 719 | * |
| 720 | *****************************************************************************/ |
| 721 | |
| 722 | |
| 723 | /***************************************************************************** |
| 724 | * |
| 725 | * TRANSPORT |
| 726 | * |
| 727 | *****************************************************************************/ |
| 728 | |
| 729 | static void transport_send_callback(pjsip_transport *transport, |
| 730 | void *token, |
| 731 | pj_ssize_t size) |
| 732 | { |
| 733 | pjsip_tx_data *tdata = (pjsip_tx_data*) token; |
| 734 | |
| 735 | PJ_UNUSED_ARG(transport); |
| 736 | |
| 737 | /* Mark pending off so that app can resend/reuse txdata from inside |
| 738 | * the callback. |
| 739 | */ |
| 740 | tdata->is_pending = 0; |
| 741 | |
| 742 | /* Call callback, if any. */ |
| 743 | if (tdata->cb) { |
| 744 | (*tdata->cb)(tdata->token, tdata, size); |
| 745 | } |
| 746 | |
| 747 | /* Decrement reference count. */ |
| 748 | pjsip_tx_data_dec_ref(tdata); |
| 749 | } |
| 750 | |
| 751 | /* This function is called by endpoint for on_tx_request() and on_tx_response() |
| 752 | * notification. |
| 753 | */ |
| 754 | static pj_status_t mod_on_tx_msg(pjsip_tx_data *tdata) |
| 755 | { |
| 756 | return pjsip_tx_data_encode(tdata); |
| 757 | } |
| 758 | |
| 759 | /* |
| 760 | * Send a SIP message using the specified transport. |
| 761 | */ |
| 762 | PJ_DEF(pj_status_t) pjsip_transport_send( pjsip_transport *tr, |
| 763 | pjsip_tx_data *tdata, |
| 764 | const pj_sockaddr_t *addr, |
| 765 | int addr_len, |
| 766 | void *token, |
| 767 | pjsip_tp_send_callback cb) |
| 768 | { |
| 769 | pj_status_t status; |
| 770 | |
| 771 | PJ_ASSERT_RETURN(tr && tdata && addr, PJ_EINVAL); |
| 772 | |
| 773 | /* Is it currently being sent? */ |
| 774 | if (tdata->is_pending) { |
| 775 | pj_assert(!"Invalid operation step!"); |
| 776 | PJ_LOG(2,(THIS_FILE, "Unable to send %s: message is pending", |
| 777 | pjsip_tx_data_get_info(tdata))); |
| 778 | return PJSIP_EPENDINGTX; |
| 779 | } |
| 780 | |
| 781 | /* Add reference to prevent deletion, and to cancel idle timer if |
| 782 | * it's running. |
| 783 | */ |
| 784 | pjsip_transport_add_ref(tr); |
| 785 | |
| 786 | /* Fill in tp_info. */ |
| 787 | tdata->tp_info.transport = tr; |
| 788 | pj_memcpy(&tdata->tp_info.dst_addr, addr, addr_len); |
| 789 | tdata->tp_info.dst_addr_len = addr_len; |
| 790 | |
| 791 | pj_inet_ntop(((pj_sockaddr*)addr)->addr.sa_family, |
| 792 | pj_sockaddr_get_addr(addr), |
| 793 | tdata->tp_info.dst_name, |
| 794 | sizeof(tdata->tp_info.dst_name)); |
| 795 | tdata->tp_info.dst_port = pj_sockaddr_get_port(addr); |
| 796 | |
| 797 | /* Distribute to modules. |
| 798 | * When the message reach mod_msg_print, the contents of the message will |
| 799 | * be "printed" to contiguous buffer. |
| 800 | */ |
| 801 | if (tr->tpmgr->on_tx_msg) { |
| 802 | status = (*tr->tpmgr->on_tx_msg)(tr->endpt, tdata); |
| 803 | if (status != PJ_SUCCESS) { |
| 804 | pjsip_transport_dec_ref(tr); |
| 805 | return status; |
| 806 | } |
| 807 | } |
| 808 | |
| 809 | /* Save callback data. */ |
| 810 | tdata->token = token; |
| 811 | tdata->cb = cb; |
| 812 | |
| 813 | /* Add reference counter. */ |
| 814 | pjsip_tx_data_add_ref(tdata); |
| 815 | |
| 816 | /* Mark as pending. */ |
| 817 | tdata->is_pending = 1; |
| 818 | |
| 819 | /* Send to transport. */ |
| 820 | status = (*tr->send_msg)(tr, tdata, addr, addr_len, (void*)tdata, |
| 821 | &transport_send_callback); |
| 822 | |
| 823 | if (status != PJ_EPENDING) { |
| 824 | tdata->is_pending = 0; |
| 825 | pjsip_tx_data_dec_ref(tdata); |
| 826 | } |
| 827 | |
| 828 | pjsip_transport_dec_ref(tr); |
| 829 | return status; |
| 830 | } |
| 831 | |
| 832 | |
| 833 | /* send_raw() callback */ |
| 834 | static void send_raw_callback(pjsip_transport *transport, |
| 835 | void *token, |
| 836 | pj_ssize_t size) |
| 837 | { |
| 838 | pjsip_tx_data *tdata = (pjsip_tx_data*) token; |
| 839 | |
| 840 | /* Mark pending off so that app can resend/reuse txdata from inside |
| 841 | * the callback. |
| 842 | */ |
| 843 | tdata->is_pending = 0; |
| 844 | |
| 845 | /* Call callback, if any. */ |
| 846 | if (tdata->cb) { |
| 847 | (*tdata->cb)(tdata->token, tdata, size); |
| 848 | } |
| 849 | |
| 850 | /* Decrement tdata reference count. */ |
| 851 | pjsip_tx_data_dec_ref(tdata); |
| 852 | |
| 853 | /* Decrement transport reference count */ |
| 854 | pjsip_transport_dec_ref(transport); |
| 855 | } |
| 856 | |
| 857 | |
| 858 | /* Send raw data */ |
| 859 | PJ_DEF(pj_status_t) pjsip_tpmgr_send_raw(pjsip_tpmgr *mgr, |
| 860 | pjsip_transport_type_e tp_type, |
| 861 | const pjsip_tpselector *sel, |
| 862 | pjsip_tx_data *tdata, |
| 863 | const void *raw_data, |
| 864 | pj_size_t data_len, |
| 865 | const pj_sockaddr_t *addr, |
| 866 | int addr_len, |
| 867 | void *token, |
| 868 | pjsip_tp_send_callback cb) |
| 869 | { |
| 870 | pjsip_transport *tr; |
| 871 | pj_status_t status; |
| 872 | |
| 873 | /* Acquire the transport */ |
| 874 | status = pjsip_tpmgr_acquire_transport(mgr, tp_type, addr, addr_len, |
| 875 | sel, &tr); |
| 876 | if (status != PJ_SUCCESS) |
| 877 | return status; |
| 878 | |
| 879 | /* Create transmit data buffer if one is not specified */ |
| 880 | if (tdata == NULL) { |
| 881 | status = pjsip_endpt_create_tdata(tr->endpt, &tdata); |
| 882 | if (status != PJ_SUCCESS) { |
| 883 | pjsip_transport_dec_ref(tr); |
| 884 | return status; |
| 885 | } |
| 886 | |
| 887 | tdata->info = "raw"; |
| 888 | |
| 889 | /* Add reference counter. */ |
| 890 | pjsip_tx_data_add_ref(tdata); |
| 891 | } |
| 892 | |
| 893 | /* Allocate buffer */ |
| 894 | if (tdata->buf.start == NULL || |
| 895 | (tdata->buf.end - tdata->buf.start) < (int)data_len) |
| 896 | { |
| 897 | /* Note: data_len may be zero, so allocate +1 */ |
| 898 | tdata->buf.start = (char*) pj_pool_alloc(tdata->pool, data_len+1); |
| 899 | tdata->buf.end = tdata->buf.start + data_len + 1; |
| 900 | } |
| 901 | |
| 902 | /* Copy data, if any! (application may send zero len packet) */ |
| 903 | if (data_len) { |
| 904 | pj_memcpy(tdata->buf.start, raw_data, data_len); |
| 905 | } |
| 906 | tdata->buf.cur = tdata->buf.start + data_len; |
| 907 | |
| 908 | /* Save callback data. */ |
| 909 | tdata->token = token; |
| 910 | tdata->cb = cb; |
| 911 | |
| 912 | /* Mark as pending. */ |
| 913 | tdata->is_pending = 1; |
| 914 | |
| 915 | /* Send to transport */ |
| 916 | status = tr->send_msg(tr, tdata, addr, addr_len, |
| 917 | tdata, &send_raw_callback); |
| 918 | |
| 919 | if (status != PJ_EPENDING) { |
| 920 | /* callback will not be called, so destroy tdata now. */ |
| 921 | pjsip_tx_data_dec_ref(tdata); |
| 922 | pjsip_transport_dec_ref(tr); |
| 923 | } |
| 924 | |
| 925 | return status; |
| 926 | } |
| 927 | |
| 928 | |
| 929 | static void transport_idle_callback(pj_timer_heap_t *timer_heap, |
| 930 | struct pj_timer_entry *entry) |
| 931 | { |
| 932 | pjsip_transport *tp = (pjsip_transport*) entry->user_data; |
| 933 | pj_assert(tp != NULL); |
| 934 | |
| 935 | PJ_UNUSED_ARG(timer_heap); |
| 936 | |
| 937 | entry->id = PJ_FALSE; |
| 938 | pjsip_transport_destroy(tp); |
| 939 | } |
| 940 | |
| 941 | /* |
| 942 | * Add ref. |
| 943 | */ |
| 944 | PJ_DEF(pj_status_t) pjsip_transport_add_ref( pjsip_transport *tp ) |
| 945 | { |
| 946 | PJ_ASSERT_RETURN(tp != NULL, PJ_EINVAL); |
| 947 | |
| 948 | if (pj_atomic_inc_and_get(tp->ref_cnt) == 1) { |
| 949 | pj_lock_acquire(tp->tpmgr->lock); |
| 950 | /* Verify again. */ |
| 951 | if (pj_atomic_get(tp->ref_cnt) == 1) { |
| 952 | if (tp->idle_timer.id != PJ_FALSE) { |
| 953 | pjsip_endpt_cancel_timer(tp->tpmgr->endpt, &tp->idle_timer); |
| 954 | tp->idle_timer.id = PJ_FALSE; |
| 955 | } |
| 956 | } |
| 957 | pj_lock_release(tp->tpmgr->lock); |
| 958 | } |
| 959 | |
| 960 | return PJ_SUCCESS; |
| 961 | } |
| 962 | |
| 963 | /* |
| 964 | * Dec ref. |
| 965 | */ |
| 966 | PJ_DEF(pj_status_t) pjsip_transport_dec_ref( pjsip_transport *tp ) |
| 967 | { |
| 968 | PJ_ASSERT_RETURN(tp != NULL, PJ_EINVAL); |
| 969 | |
| 970 | pj_assert(pj_atomic_get(tp->ref_cnt) > 0); |
| 971 | |
| 972 | if (pj_atomic_dec_and_get(tp->ref_cnt) == 0) { |
| 973 | pj_lock_acquire(tp->tpmgr->lock); |
| 974 | /* Verify again. Do not register timer if the transport is |
| 975 | * being destroyed. |
| 976 | */ |
| 977 | if (pj_atomic_get(tp->ref_cnt) == 0 && !tp->is_destroying) { |
| 978 | pj_time_val delay; |
| 979 | |
| 980 | /* If transport is in graceful shutdown, then this is the |
| 981 | * last user who uses the transport. Schedule to destroy the |
| 982 | * transport immediately. Otherwise schedule idle timer. |
| 983 | */ |
| 984 | if (tp->is_shutdown) { |
| 985 | delay.sec = delay.msec = 0; |
| 986 | } else { |
| 987 | delay.sec = (tp->dir==PJSIP_TP_DIR_OUTGOING) ? |
| 988 | PJSIP_TRANSPORT_IDLE_TIME : |
| 989 | PJSIP_TRANSPORT_SERVER_IDLE_TIME; |
| 990 | delay.msec = 0; |
| 991 | } |
| 992 | |
| 993 | pj_assert(tp->idle_timer.id == 0); |
| 994 | tp->idle_timer.id = PJ_TRUE; |
| 995 | pjsip_endpt_schedule_timer(tp->tpmgr->endpt, &tp->idle_timer, |
| 996 | &delay); |
| 997 | } |
| 998 | pj_lock_release(tp->tpmgr->lock); |
| 999 | } |
| 1000 | |
| 1001 | return PJ_SUCCESS; |
| 1002 | } |
| 1003 | |
| 1004 | |
| 1005 | /** |
| 1006 | * Register a transport. |
| 1007 | */ |
| 1008 | PJ_DEF(pj_status_t) pjsip_transport_register( pjsip_tpmgr *mgr, |
| 1009 | pjsip_transport *tp ) |
| 1010 | { |
| 1011 | int key_len; |
| 1012 | pj_uint32_t hval; |
| 1013 | void *entry; |
| 1014 | |
| 1015 | /* Init. */ |
| 1016 | tp->tpmgr = mgr; |
| 1017 | pj_bzero(&tp->idle_timer, sizeof(tp->idle_timer)); |
| 1018 | tp->idle_timer.user_data = tp; |
| 1019 | tp->idle_timer.cb = &transport_idle_callback; |
| 1020 | |
| 1021 | /* |
| 1022 | * Register to hash table (see Trac ticket #42). |
| 1023 | */ |
| 1024 | key_len = sizeof(tp->key.type) + tp->addr_len; |
| 1025 | pj_lock_acquire(mgr->lock); |
| 1026 | |
| 1027 | /* If entry already occupied, unregister previous entry */ |
| 1028 | hval = 0; |
| 1029 | entry = pj_hash_get(mgr->table, &tp->key, key_len, &hval); |
| 1030 | if (entry != NULL) |
| 1031 | pj_hash_set(NULL, mgr->table, &tp->key, key_len, hval, NULL); |
| 1032 | |
| 1033 | /* Register new entry */ |
| 1034 | pj_hash_set(tp->pool, mgr->table, &tp->key, key_len, hval, tp); |
| 1035 | |
| 1036 | pj_lock_release(mgr->lock); |
| 1037 | |
| 1038 | TRACE_((THIS_FILE,"Transport %s registered: type=%s, remote=%s:%d", |
| 1039 | tp->obj_name, |
| 1040 | pjsip_transport_get_type_name(tp->key.type), |
| 1041 | addr_string(&tp->key.rem_addr), |
| 1042 | pj_sockaddr_get_port(&tp->key.rem_addr))); |
| 1043 | |
| 1044 | return PJ_SUCCESS; |
| 1045 | } |
| 1046 | |
| 1047 | /* Force destroy transport (e.g. during transport manager shutdown. */ |
| 1048 | static pj_status_t destroy_transport( pjsip_tpmgr *mgr, |
| 1049 | pjsip_transport *tp ) |
| 1050 | { |
| 1051 | int key_len; |
| 1052 | pj_uint32_t hval; |
| 1053 | void *entry; |
| 1054 | |
| 1055 | TRACE_((THIS_FILE, "Transport %s is being destroyed", tp->obj_name)); |
| 1056 | |
| 1057 | pj_lock_acquire(tp->lock); |
| 1058 | pj_lock_acquire(mgr->lock); |
| 1059 | |
| 1060 | tp->is_destroying = PJ_TRUE; |
| 1061 | |
| 1062 | /* |
| 1063 | * Unregister timer, if any. |
| 1064 | */ |
| 1065 | //pj_assert(tp->idle_timer.id == PJ_FALSE); |
| 1066 | if (tp->idle_timer.id != PJ_FALSE) { |
| 1067 | pjsip_endpt_cancel_timer(mgr->endpt, &tp->idle_timer); |
| 1068 | tp->idle_timer.id = PJ_FALSE; |
| 1069 | } |
| 1070 | |
| 1071 | /* |
| 1072 | * Unregister from hash table (see Trac ticket #42). |
| 1073 | */ |
| 1074 | key_len = sizeof(tp->key.type) + tp->addr_len; |
| 1075 | hval = 0; |
| 1076 | entry = pj_hash_get(mgr->table, &tp->key, key_len, &hval); |
| 1077 | if (entry == (void*)tp) |
| 1078 | pj_hash_set(NULL, mgr->table, &tp->key, key_len, hval, NULL); |
| 1079 | |
| 1080 | pj_lock_release(mgr->lock); |
| 1081 | |
| 1082 | /* Destroy. */ |
| 1083 | return tp->destroy(tp); |
| 1084 | } |
| 1085 | |
| 1086 | |
| 1087 | /* |
| 1088 | * Start graceful shutdown procedure for this transport. |
| 1089 | */ |
| 1090 | PJ_DEF(pj_status_t) pjsip_transport_shutdown(pjsip_transport *tp) |
| 1091 | { |
| 1092 | pjsip_tpmgr *mgr; |
| 1093 | pj_status_t status; |
| 1094 | |
| 1095 | TRACE_((THIS_FILE, "Transport %s shutting down", tp->obj_name)); |
| 1096 | |
| 1097 | pj_lock_acquire(tp->lock); |
| 1098 | |
| 1099 | mgr = tp->tpmgr; |
| 1100 | pj_lock_acquire(mgr->lock); |
| 1101 | |
| 1102 | /* Do nothing if transport is being shutdown already */ |
| 1103 | if (tp->is_shutdown) { |
| 1104 | pj_lock_release(tp->lock); |
| 1105 | pj_lock_release(mgr->lock); |
| 1106 | return PJ_SUCCESS; |
| 1107 | } |
| 1108 | |
| 1109 | status = PJ_SUCCESS; |
| 1110 | |
| 1111 | /* Instruct transport to shutdown itself */ |
| 1112 | if (tp->do_shutdown) |
| 1113 | status = tp->do_shutdown(tp); |
| 1114 | |
| 1115 | if (status == PJ_SUCCESS) |
| 1116 | tp->is_shutdown = PJ_TRUE; |
| 1117 | |
| 1118 | /* If transport reference count is zero, start timer count-down */ |
| 1119 | if (pj_atomic_get(tp->ref_cnt) == 0) { |
| 1120 | pjsip_transport_add_ref(tp); |
| 1121 | pjsip_transport_dec_ref(tp); |
| 1122 | } |
| 1123 | |
| 1124 | pj_lock_release(tp->lock); |
| 1125 | pj_lock_release(mgr->lock); |
| 1126 | |
| 1127 | return status; |
| 1128 | } |
| 1129 | |
| 1130 | |
| 1131 | /** |
| 1132 | * Unregister transport. |
| 1133 | */ |
| 1134 | PJ_DEF(pj_status_t) pjsip_transport_destroy( pjsip_transport *tp) |
| 1135 | { |
| 1136 | /* Must have no user. */ |
| 1137 | PJ_ASSERT_RETURN(pj_atomic_get(tp->ref_cnt) == 0, PJSIP_EBUSY); |
| 1138 | |
| 1139 | /* Destroy. */ |
| 1140 | return destroy_transport(tp->tpmgr, tp); |
| 1141 | } |
| 1142 | |
| 1143 | |
| 1144 | |
| 1145 | /***************************************************************************** |
| 1146 | * |
| 1147 | * TRANSPORT FACTORY |
| 1148 | * |
| 1149 | *****************************************************************************/ |
| 1150 | |
| 1151 | |
| 1152 | PJ_DEF(pj_status_t) pjsip_tpmgr_register_tpfactory( pjsip_tpmgr *mgr, |
| 1153 | pjsip_tpfactory *tpf) |
| 1154 | { |
| 1155 | pjsip_tpfactory *p; |
| 1156 | pj_status_t status; |
| 1157 | |
| 1158 | pj_lock_acquire(mgr->lock); |
| 1159 | |
| 1160 | /* Check that no factory with the same type has been registered. */ |
| 1161 | status = PJ_SUCCESS; |
| 1162 | for (p=mgr->factory_list.next; p!=&mgr->factory_list; p=p->next) { |
| 1163 | if (p->type == tpf->type) { |
| 1164 | status = PJSIP_ETYPEEXISTS; |
| 1165 | break; |
| 1166 | } |
| 1167 | if (p == tpf) { |
| 1168 | status = PJ_EEXISTS; |
| 1169 | break; |
| 1170 | } |
| 1171 | } |
| 1172 | |
| 1173 | if (status != PJ_SUCCESS) { |
| 1174 | pj_lock_release(mgr->lock); |
| 1175 | return status; |
| 1176 | } |
| 1177 | |
| 1178 | pj_list_insert_before(&mgr->factory_list, tpf); |
| 1179 | |
| 1180 | pj_lock_release(mgr->lock); |
| 1181 | |
| 1182 | return PJ_SUCCESS; |
| 1183 | } |
| 1184 | |
| 1185 | |
| 1186 | /** |
| 1187 | * Unregister factory. |
| 1188 | */ |
| 1189 | PJ_DEF(pj_status_t) pjsip_tpmgr_unregister_tpfactory( pjsip_tpmgr *mgr, |
| 1190 | pjsip_tpfactory *tpf) |
| 1191 | { |
| 1192 | pj_lock_acquire(mgr->lock); |
| 1193 | |
| 1194 | pj_assert(pj_list_find_node(&mgr->factory_list, tpf) == tpf); |
| 1195 | pj_list_erase(tpf); |
| 1196 | |
| 1197 | pj_lock_release(mgr->lock); |
| 1198 | |
| 1199 | return PJ_SUCCESS; |
| 1200 | } |
| 1201 | |
| 1202 | PJ_DECL(void) pjsip_tpmgr_fla2_param_default(pjsip_tpmgr_fla2_param *prm) |
| 1203 | { |
| 1204 | pj_bzero(prm, sizeof(*prm)); |
| 1205 | } |
| 1206 | |
| 1207 | /***************************************************************************** |
| 1208 | * |
| 1209 | * TRANSPORT MANAGER |
| 1210 | * |
| 1211 | *****************************************************************************/ |
| 1212 | |
| 1213 | /* |
| 1214 | * Create a new transport manager. |
| 1215 | */ |
| 1216 | PJ_DEF(pj_status_t) pjsip_tpmgr_create( pj_pool_t *pool, |
| 1217 | pjsip_endpoint *endpt, |
| 1218 | pjsip_rx_callback rx_cb, |
| 1219 | pjsip_tx_callback tx_cb, |
| 1220 | pjsip_tpmgr **p_mgr) |
| 1221 | { |
| 1222 | pjsip_tpmgr *mgr; |
| 1223 | pj_status_t status; |
| 1224 | |
| 1225 | PJ_ASSERT_RETURN(pool && endpt && rx_cb && p_mgr, PJ_EINVAL); |
| 1226 | |
| 1227 | /* Register mod_msg_print module. */ |
| 1228 | status = pjsip_endpt_register_module(endpt, &mod_msg_print); |
| 1229 | if (status != PJ_SUCCESS) |
| 1230 | return status; |
| 1231 | |
| 1232 | /* Create and initialize transport manager. */ |
| 1233 | mgr = PJ_POOL_ZALLOC_T(pool, pjsip_tpmgr); |
| 1234 | mgr->endpt = endpt; |
| 1235 | mgr->on_rx_msg = rx_cb; |
| 1236 | mgr->on_tx_msg = tx_cb; |
| 1237 | pj_list_init(&mgr->factory_list); |
| 1238 | pj_list_init(&mgr->tdata_list); |
| 1239 | |
| 1240 | mgr->table = pj_hash_create(pool, PJSIP_TPMGR_HTABLE_SIZE); |
| 1241 | if (!mgr->table) |
| 1242 | return PJ_ENOMEM; |
| 1243 | |
| 1244 | status = pj_lock_create_recursive_mutex(pool, "tmgr%p", &mgr->lock); |
| 1245 | if (status != PJ_SUCCESS) |
| 1246 | return status; |
| 1247 | |
| 1248 | #if defined(PJ_DEBUG) && PJ_DEBUG!=0 |
| 1249 | status = pj_atomic_create(pool, 0, &mgr->tdata_counter); |
| 1250 | if (status != PJ_SUCCESS) { |
| 1251 | pj_lock_destroy(mgr->lock); |
| 1252 | return status; |
| 1253 | } |
| 1254 | #endif |
| 1255 | |
| 1256 | /* Set transport state callback */ |
| 1257 | pjsip_tpmgr_set_state_cb(mgr, &tp_state_callback); |
| 1258 | |
| 1259 | PJ_LOG(5, (THIS_FILE, "Transport manager created.")); |
| 1260 | |
| 1261 | *p_mgr = mgr; |
| 1262 | return PJ_SUCCESS; |
| 1263 | } |
| 1264 | |
| 1265 | /* Get the interface to send packet to the specified address */ |
| 1266 | static pj_status_t get_net_interface(pjsip_transport_type_e tp_type, |
| 1267 | const pj_str_t *dst, |
| 1268 | pj_str_t *itf_str_addr) |
| 1269 | { |
| 1270 | int af; |
| 1271 | pj_sockaddr itf_addr; |
| 1272 | pj_status_t status; |
| 1273 | |
| 1274 | af = (tp_type & PJSIP_TRANSPORT_IPV6)? PJ_AF_INET6 : PJ_AF_INET; |
| 1275 | status = pj_getipinterface(af, dst, &itf_addr, PJ_FALSE, NULL); |
| 1276 | if (status != PJ_SUCCESS) { |
| 1277 | /* If it fails, e.g: on WM6 (http://support.microsoft.com/kb/129065), |
| 1278 | * just fallback using pj_gethostip(), see ticket #1660. |
| 1279 | */ |
| 1280 | PJ_LOG(5,(THIS_FILE,"Warning: unable to determine local " |
| 1281 | "interface, fallback to default interface!")); |
| 1282 | status = pj_gethostip(af, &itf_addr); |
| 1283 | if (status != PJ_SUCCESS) |
| 1284 | return status; |
| 1285 | } |
| 1286 | |
| 1287 | /* Print address */ |
| 1288 | pj_sockaddr_print(&itf_addr, itf_str_addr->ptr, |
| 1289 | PJ_INET6_ADDRSTRLEN, 0); |
| 1290 | itf_str_addr->slen = pj_ansi_strlen(itf_str_addr->ptr); |
| 1291 | |
| 1292 | return PJ_SUCCESS; |
| 1293 | } |
| 1294 | |
| 1295 | /* |
| 1296 | * Find out the appropriate local address info (IP address and port) to |
| 1297 | * advertise in Contact header based on the remote address to be |
| 1298 | * contacted. The local address info would be the address name of the |
| 1299 | * transport or listener which will be used to send the request. |
| 1300 | * |
| 1301 | * In this implementation, it will only select the transport based on |
| 1302 | * the transport type in the request. |
| 1303 | */ |
| 1304 | PJ_DEF(pj_status_t) pjsip_tpmgr_find_local_addr2(pjsip_tpmgr *tpmgr, |
| 1305 | pj_pool_t *pool, |
| 1306 | pjsip_tpmgr_fla2_param *prm) |
| 1307 | { |
| 1308 | char tmp_buf[PJ_INET6_ADDRSTRLEN+10]; |
| 1309 | pj_str_t tmp_str; |
| 1310 | pj_status_t status = PJSIP_EUNSUPTRANSPORT; |
| 1311 | unsigned flag; |
| 1312 | |
| 1313 | /* Sanity checks */ |
| 1314 | PJ_ASSERT_RETURN(tpmgr && pool && prm, PJ_EINVAL); |
| 1315 | |
| 1316 | pj_strset(&tmp_str, tmp_buf, 0); |
| 1317 | prm->ret_addr.slen = 0; |
| 1318 | prm->ret_port = 0; |
| 1319 | prm->ret_tp = NULL; |
| 1320 | |
| 1321 | flag = pjsip_transport_get_flag_from_type(prm->tp_type); |
| 1322 | |
| 1323 | if (prm->tp_sel && prm->tp_sel->type == PJSIP_TPSELECTOR_TRANSPORT && |
| 1324 | prm->tp_sel->u.transport) |
| 1325 | { |
| 1326 | const pjsip_transport *tp = prm->tp_sel->u.transport; |
| 1327 | if (prm->local_if) { |
| 1328 | status = get_net_interface((pjsip_transport_type_e)tp->key.type, |
| 1329 | &prm->dst_host, &tmp_str); |
| 1330 | if (status != PJ_SUCCESS) |
| 1331 | goto on_return; |
| 1332 | pj_strdup(pool, &prm->ret_addr, &tmp_str); |
| 1333 | prm->ret_port = pj_sockaddr_get_port(&tp->local_addr); |
| 1334 | prm->ret_tp = tp; |
| 1335 | } else { |
| 1336 | pj_strdup(pool, &prm->ret_addr, &tp->local_name.host); |
| 1337 | prm->ret_port = (pj_uint16_t)tp->local_name.port; |
| 1338 | } |
| 1339 | status = PJ_SUCCESS; |
| 1340 | |
| 1341 | } else if (prm->tp_sel && prm->tp_sel->type == PJSIP_TPSELECTOR_LISTENER && |
| 1342 | prm->tp_sel->u.listener) |
| 1343 | { |
| 1344 | if (prm->local_if) { |
| 1345 | status = get_net_interface(prm->tp_sel->u.listener->type, |
| 1346 | &prm->dst_host, &tmp_str); |
| 1347 | if (status != PJ_SUCCESS) |
| 1348 | goto on_return; |
| 1349 | pj_strdup(pool, &prm->ret_addr, &tmp_str); |
| 1350 | } else { |
| 1351 | pj_strdup(pool, &prm->ret_addr, |
| 1352 | &prm->tp_sel->u.listener->addr_name.host); |
| 1353 | } |
| 1354 | prm->ret_port = (pj_uint16_t)prm->tp_sel->u.listener->addr_name.port; |
| 1355 | status = PJ_SUCCESS; |
| 1356 | |
| 1357 | } else if ((flag & PJSIP_TRANSPORT_DATAGRAM) != 0) { |
| 1358 | pj_sockaddr remote; |
| 1359 | int addr_len; |
| 1360 | pjsip_transport *tp; |
| 1361 | |
| 1362 | pj_bzero(&remote, sizeof(remote)); |
| 1363 | if (prm->tp_type & PJSIP_TRANSPORT_IPV6) { |
| 1364 | addr_len = sizeof(pj_sockaddr_in6); |
| 1365 | remote.addr.sa_family = pj_AF_INET6(); |
| 1366 | } else { |
| 1367 | addr_len = sizeof(pj_sockaddr_in); |
| 1368 | remote.addr.sa_family = pj_AF_INET(); |
| 1369 | } |
| 1370 | |
| 1371 | status = pjsip_tpmgr_acquire_transport(tpmgr, prm->tp_type, &remote, |
| 1372 | addr_len, NULL, &tp); |
| 1373 | |
| 1374 | if (status == PJ_SUCCESS) { |
| 1375 | if (prm->local_if) { |
| 1376 | status = get_net_interface((pjsip_transport_type_e) |
| 1377 | tp->key.type, |
| 1378 | &prm->dst_host, &tmp_str); |
| 1379 | if (status != PJ_SUCCESS) |
| 1380 | goto on_return; |
| 1381 | pj_strdup(pool, &prm->ret_addr, &tmp_str); |
| 1382 | prm->ret_port = pj_sockaddr_get_port(&tp->local_addr); |
| 1383 | prm->ret_tp = tp; |
| 1384 | } else { |
| 1385 | pj_strdup(pool, &prm->ret_addr, &tp->local_name.host); |
| 1386 | prm->ret_port = (pj_uint16_t)tp->local_name.port; |
| 1387 | } |
| 1388 | |
| 1389 | pjsip_transport_dec_ref(tp); |
| 1390 | } |
| 1391 | |
| 1392 | } else { |
| 1393 | /* For connection oriented transport, enum the factories */ |
| 1394 | pjsip_tpfactory *f; |
| 1395 | |
| 1396 | pj_lock_acquire(tpmgr->lock); |
| 1397 | |
| 1398 | f = tpmgr->factory_list.next; |
| 1399 | while (f != &tpmgr->factory_list) { |
| 1400 | if (f->type == prm->tp_type) |
| 1401 | break; |
| 1402 | f = f->next; |
| 1403 | } |
| 1404 | |
| 1405 | if (f != &tpmgr->factory_list) { |
| 1406 | if (prm->local_if) { |
| 1407 | status = get_net_interface(f->type, &prm->dst_host, |
| 1408 | &tmp_str); |
| 1409 | if (status == PJ_SUCCESS) { |
| 1410 | pj_strdup(pool, &prm->ret_addr, &tmp_str); |
| 1411 | } else { |
| 1412 | /* It could fail "normally" on certain cases, e.g. |
| 1413 | * when connecting to IPv6 link local address, it |
| 1414 | * will wail with EINVAL. |
| 1415 | * In this case, fallback to use the default interface |
| 1416 | * rather than failing the call. |
| 1417 | */ |
| 1418 | PJ_PERROR(5,(THIS_FILE, status, "Warning: unable to " |
| 1419 | "determine local interface")); |
| 1420 | pj_strdup(pool, &prm->ret_addr, &f->addr_name.host); |
| 1421 | status = PJ_SUCCESS; |
| 1422 | } |
| 1423 | } else { |
| 1424 | pj_strdup(pool, &prm->ret_addr, &f->addr_name.host); |
| 1425 | } |
| 1426 | prm->ret_port = (pj_uint16_t)f->addr_name.port; |
| 1427 | status = PJ_SUCCESS; |
| 1428 | } |
| 1429 | pj_lock_release(tpmgr->lock); |
| 1430 | } |
| 1431 | |
| 1432 | on_return: |
| 1433 | return status; |
| 1434 | } |
| 1435 | |
| 1436 | PJ_DEF(pj_status_t) pjsip_tpmgr_find_local_addr( pjsip_tpmgr *tpmgr, |
| 1437 | pj_pool_t *pool, |
| 1438 | pjsip_transport_type_e type, |
| 1439 | const pjsip_tpselector *sel, |
| 1440 | pj_str_t *ip_addr, |
| 1441 | int *port) |
| 1442 | { |
| 1443 | pjsip_tpmgr_fla2_param prm; |
| 1444 | pj_status_t status; |
| 1445 | |
| 1446 | pjsip_tpmgr_fla2_param_default(&prm); |
| 1447 | prm.tp_type = type; |
| 1448 | prm.tp_sel = sel; |
| 1449 | |
| 1450 | status = pjsip_tpmgr_find_local_addr2(tpmgr, pool, &prm); |
| 1451 | if (status != PJ_SUCCESS) |
| 1452 | return status; |
| 1453 | |
| 1454 | *ip_addr = prm.ret_addr; |
| 1455 | *port = prm.ret_port; |
| 1456 | |
| 1457 | return PJ_SUCCESS; |
| 1458 | } |
| 1459 | |
| 1460 | /* |
| 1461 | * Return number of transports currently registered to the transport |
| 1462 | * manager. |
| 1463 | */ |
| 1464 | PJ_DEF(unsigned) pjsip_tpmgr_get_transport_count(pjsip_tpmgr *mgr) |
| 1465 | { |
| 1466 | pj_hash_iterator_t itr_val; |
| 1467 | pj_hash_iterator_t *itr; |
| 1468 | int nr_of_transports = 0; |
| 1469 | |
| 1470 | pj_lock_acquire(mgr->lock); |
| 1471 | |
| 1472 | itr = pj_hash_first(mgr->table, &itr_val); |
| 1473 | while (itr) { |
| 1474 | nr_of_transports++; |
| 1475 | itr = pj_hash_next(mgr->table, itr); |
| 1476 | } |
| 1477 | |
| 1478 | pj_lock_release(mgr->lock); |
| 1479 | |
| 1480 | return nr_of_transports; |
| 1481 | } |
| 1482 | |
| 1483 | /* |
| 1484 | * pjsip_tpmgr_destroy() |
| 1485 | * |
| 1486 | * Destroy transport manager. |
| 1487 | */ |
| 1488 | PJ_DEF(pj_status_t) pjsip_tpmgr_destroy( pjsip_tpmgr *mgr ) |
| 1489 | { |
| 1490 | pj_hash_iterator_t itr_val; |
| 1491 | pj_hash_iterator_t *itr; |
| 1492 | pjsip_tpfactory *factory; |
| 1493 | pjsip_endpoint *endpt = mgr->endpt; |
| 1494 | |
| 1495 | PJ_LOG(5, (THIS_FILE, "Destroying transport manager")); |
| 1496 | |
| 1497 | pj_lock_acquire(mgr->lock); |
| 1498 | |
| 1499 | /* |
| 1500 | * Destroy all transports. |
| 1501 | */ |
| 1502 | itr = pj_hash_first(mgr->table, &itr_val); |
| 1503 | while (itr != NULL) { |
| 1504 | pj_hash_iterator_t *next; |
| 1505 | pjsip_transport *transport; |
| 1506 | |
| 1507 | transport = (pjsip_transport*) pj_hash_this(mgr->table, itr); |
| 1508 | |
| 1509 | next = pj_hash_next(mgr->table, itr); |
| 1510 | |
| 1511 | destroy_transport(mgr, transport); |
| 1512 | |
| 1513 | itr = next; |
| 1514 | } |
| 1515 | |
| 1516 | /* |
| 1517 | * Destroy all factories/listeners. |
| 1518 | */ |
| 1519 | factory = mgr->factory_list.next; |
| 1520 | while (factory != &mgr->factory_list) { |
| 1521 | pjsip_tpfactory *next = factory->next; |
| 1522 | |
| 1523 | factory->destroy(factory); |
| 1524 | |
| 1525 | factory = next; |
| 1526 | } |
| 1527 | |
| 1528 | pj_lock_release(mgr->lock); |
| 1529 | |
| 1530 | #if defined(PJ_DEBUG) && PJ_DEBUG!=0 |
| 1531 | /* If you encounter assert error on this line, it means there are |
| 1532 | * leakings in transmit data (i.e. some transmit data have not been |
| 1533 | * destroyed). |
| 1534 | */ |
| 1535 | //pj_assert(pj_atomic_get(mgr->tdata_counter) == 0); |
| 1536 | if (pj_atomic_get(mgr->tdata_counter) != 0) { |
| 1537 | PJ_LOG(3,(THIS_FILE, "Warning: %d transmit buffer(s) not freed!", |
| 1538 | pj_atomic_get(mgr->tdata_counter))); |
| 1539 | } |
| 1540 | #endif |
| 1541 | |
| 1542 | /* |
| 1543 | * Destroy any dangling transmit buffer. |
| 1544 | */ |
| 1545 | if (!pj_list_empty(&mgr->tdata_list)) { |
| 1546 | pjsip_tx_data *tdata = mgr->tdata_list.next; |
| 1547 | while (tdata != &mgr->tdata_list) { |
| 1548 | pjsip_tx_data *next = tdata->next; |
| 1549 | tx_data_destroy(tdata); |
| 1550 | tdata = next; |
| 1551 | } |
| 1552 | PJ_LOG(3,(THIS_FILE, "Cleaned up dangling transmit buffer(s).")); |
| 1553 | } |
| 1554 | |
| 1555 | #if defined(PJ_DEBUG) && PJ_DEBUG!=0 |
| 1556 | pj_atomic_destroy(mgr->tdata_counter); |
| 1557 | #endif |
| 1558 | |
| 1559 | pj_lock_destroy(mgr->lock); |
| 1560 | |
| 1561 | /* Unregister mod_msg_print. */ |
| 1562 | if (mod_msg_print.id != -1) { |
| 1563 | pjsip_endpt_unregister_module(endpt, &mod_msg_print); |
| 1564 | } |
| 1565 | |
| 1566 | return PJ_SUCCESS; |
| 1567 | } |
| 1568 | |
| 1569 | |
| 1570 | /* |
| 1571 | * pjsip_tpmgr_receive_packet() |
| 1572 | * |
| 1573 | * Called by tranports when they receive a new packet. |
| 1574 | */ |
| 1575 | PJ_DEF(pj_ssize_t) pjsip_tpmgr_receive_packet( pjsip_tpmgr *mgr, |
| 1576 | pjsip_rx_data *rdata) |
| 1577 | { |
| 1578 | pjsip_transport *tr = rdata->tp_info.transport; |
| 1579 | |
| 1580 | char *current_pkt; |
| 1581 | pj_size_t remaining_len; |
| 1582 | pj_size_t total_processed = 0; |
| 1583 | |
| 1584 | /* Check size. */ |
| 1585 | pj_assert(rdata->pkt_info.len > 0); |
| 1586 | if (rdata->pkt_info.len <= 0) |
| 1587 | return -1; |
| 1588 | |
| 1589 | current_pkt = rdata->pkt_info.packet; |
| 1590 | remaining_len = rdata->pkt_info.len; |
| 1591 | |
| 1592 | /* Must NULL terminate buffer. This is the requirement of the |
| 1593 | * parser etc. |
| 1594 | */ |
| 1595 | current_pkt[remaining_len] = '\0'; |
| 1596 | |
| 1597 | /* Process all message fragments. */ |
| 1598 | while (remaining_len > 0) { |
| 1599 | |
| 1600 | pjsip_msg *msg; |
| 1601 | char *p, *end; |
| 1602 | char saved; |
| 1603 | pj_size_t msg_fragment_size; |
| 1604 | |
| 1605 | /* Skip leading newlines as pjsip_find_msg() currently can't |
| 1606 | * handle leading newlines. |
| 1607 | */ |
| 1608 | for (p=current_pkt, end=p+remaining_len; p!=end; ++p) { |
| 1609 | if (*p != '\r' && *p != '\n') |
| 1610 | break; |
| 1611 | } |
| 1612 | if (p!=current_pkt) { |
| 1613 | remaining_len -= (p - current_pkt); |
| 1614 | total_processed += (p - current_pkt); |
| 1615 | current_pkt = p; |
| 1616 | if (remaining_len == 0) { |
| 1617 | return total_processed; |
| 1618 | } |
| 1619 | } |
| 1620 | |
| 1621 | /* Initialize default fragment size. */ |
| 1622 | msg_fragment_size = remaining_len; |
| 1623 | |
| 1624 | /* Clear and init msg_info in rdata. |
| 1625 | * Endpoint might inspect the values there when we call the callback |
| 1626 | * to report some errors. |
| 1627 | */ |
| 1628 | pj_bzero(&rdata->msg_info, sizeof(rdata->msg_info)); |
| 1629 | pj_list_init(&rdata->msg_info.parse_err); |
| 1630 | rdata->msg_info.msg_buf = current_pkt; |
| 1631 | rdata->msg_info.len = (int)remaining_len; |
| 1632 | |
| 1633 | /* For TCP transport, check if the whole message has been received. */ |
| 1634 | if ((tr->flag & PJSIP_TRANSPORT_DATAGRAM) == 0) { |
| 1635 | pj_status_t msg_status; |
| 1636 | msg_status = pjsip_find_msg(current_pkt, remaining_len, PJ_FALSE, |
| 1637 | &msg_fragment_size); |
| 1638 | if (msg_status != PJ_SUCCESS) { |
| 1639 | if (remaining_len == PJSIP_MAX_PKT_LEN) { |
| 1640 | mgr->on_rx_msg(mgr->endpt, PJSIP_ERXOVERFLOW, rdata); |
| 1641 | /* Exhaust all data. */ |
| 1642 | return rdata->pkt_info.len; |
| 1643 | } else { |
| 1644 | /* Not enough data in packet. */ |
| 1645 | return total_processed; |
| 1646 | } |
| 1647 | } |
| 1648 | } |
| 1649 | |
| 1650 | /* Update msg_info. */ |
| 1651 | rdata->msg_info.len = (int)msg_fragment_size; |
| 1652 | |
| 1653 | /* Null terminate packet */ |
| 1654 | saved = current_pkt[msg_fragment_size]; |
| 1655 | current_pkt[msg_fragment_size] = '\0'; |
| 1656 | |
| 1657 | /* Parse the message. */ |
| 1658 | rdata->msg_info.msg = msg = |
| 1659 | pjsip_parse_rdata( current_pkt, msg_fragment_size, rdata); |
| 1660 | |
| 1661 | /* Restore null termination */ |
| 1662 | current_pkt[msg_fragment_size] = saved; |
| 1663 | |
| 1664 | /* Check for parsing syntax error */ |
| 1665 | if (msg==NULL || !pj_list_empty(&rdata->msg_info.parse_err)) { |
| 1666 | pjsip_parser_err_report *err; |
| 1667 | char buf[128]; |
| 1668 | pj_str_t tmp; |
| 1669 | |
| 1670 | /* Gather syntax error information */ |
| 1671 | tmp.ptr = buf; tmp.slen = 0; |
| 1672 | err = rdata->msg_info.parse_err.next; |
| 1673 | while (err != &rdata->msg_info.parse_err) { |
| 1674 | int len; |
| 1675 | len = pj_ansi_snprintf(tmp.ptr+tmp.slen, sizeof(buf)-tmp.slen, |
| 1676 | ": %s exception when parsing '%.*s' " |
| 1677 | "header on line %d col %d", |
| 1678 | pj_exception_id_name(err->except_code), |
| 1679 | (int)err->hname.slen, err->hname.ptr, |
| 1680 | err->line, err->col); |
| 1681 | if (len > 0 && len < (int) (sizeof(buf)-tmp.slen)) { |
| 1682 | tmp.slen += len; |
| 1683 | } |
| 1684 | err = err->next; |
| 1685 | } |
| 1686 | |
| 1687 | /* Only print error message if there's error. |
| 1688 | * Sometimes we receive blank packets (packets with only CRLF) |
| 1689 | * which were sent to keep NAT bindings. |
| 1690 | */ |
| 1691 | if (tmp.slen) { |
| 1692 | PJ_LOG(1, (THIS_FILE, |
| 1693 | "Error processing %d bytes packet from %s %s:%d %.*s:\n" |
| 1694 | "%.*s\n" |
| 1695 | "-- end of packet.", |
| 1696 | msg_fragment_size, |
| 1697 | rdata->tp_info.transport->type_name, |
| 1698 | rdata->pkt_info.src_name, |
| 1699 | rdata->pkt_info.src_port, |
| 1700 | (int)tmp.slen, tmp.ptr, |
| 1701 | (int)msg_fragment_size, |
| 1702 | rdata->msg_info.msg_buf)); |
| 1703 | } |
| 1704 | |
| 1705 | goto finish_process_fragment; |
| 1706 | } |
| 1707 | |
| 1708 | /* Perform basic header checking. */ |
| 1709 | if (rdata->msg_info.cid == NULL || |
| 1710 | rdata->msg_info.cid->id.slen == 0 || |
| 1711 | rdata->msg_info.from == NULL || |
| 1712 | rdata->msg_info.to == NULL || |
| 1713 | rdata->msg_info.via == NULL || |
| 1714 | rdata->msg_info.cseq == NULL) |
| 1715 | { |
| 1716 | mgr->on_rx_msg(mgr->endpt, PJSIP_EMISSINGHDR, rdata); |
| 1717 | goto finish_process_fragment; |
| 1718 | } |
| 1719 | |
| 1720 | /* For request: */ |
| 1721 | if (rdata->msg_info.msg->type == PJSIP_REQUEST_MSG) { |
| 1722 | /* always add received parameter to the via. */ |
| 1723 | pj_strdup2(rdata->tp_info.pool, |
| 1724 | &rdata->msg_info.via->recvd_param, |
| 1725 | rdata->pkt_info.src_name); |
| 1726 | |
| 1727 | /* RFC 3581: |
| 1728 | * If message contains "rport" param, put the received port there. |
| 1729 | */ |
| 1730 | if (rdata->msg_info.via->rport_param == 0) { |
| 1731 | rdata->msg_info.via->rport_param = rdata->pkt_info.src_port; |
| 1732 | } |
| 1733 | } else { |
| 1734 | /* Drop malformed responses */ |
| 1735 | if (rdata->msg_info.msg->line.status.code < 100 || |
| 1736 | rdata->msg_info.msg->line.status.code >= 700) |
| 1737 | { |
| 1738 | mgr->on_rx_msg(mgr->endpt, PJSIP_EINVALIDSTATUS, rdata); |
| 1739 | goto finish_process_fragment; |
| 1740 | } |
| 1741 | } |
| 1742 | |
| 1743 | /* Drop response message if it has more than one Via. |
| 1744 | */ |
| 1745 | /* This is wrong. Proxy DOES receive responses with multiple |
| 1746 | * Via headers! Thanks Aldo <acampi at deis.unibo.it> for pointing |
| 1747 | * this out. |
| 1748 | |
| 1749 | if (msg->type == PJSIP_RESPONSE_MSG) { |
| 1750 | pjsip_hdr *hdr; |
| 1751 | hdr = (pjsip_hdr*)rdata->msg_info.via->next; |
| 1752 | if (hdr != &msg->hdr) { |
| 1753 | hdr = pjsip_msg_find_hdr(msg, PJSIP_H_VIA, hdr); |
| 1754 | if (hdr) { |
| 1755 | mgr->on_rx_msg(mgr->endpt, PJSIP_EMULTIPLEVIA, rdata); |
| 1756 | goto finish_process_fragment; |
| 1757 | } |
| 1758 | } |
| 1759 | } |
| 1760 | */ |
| 1761 | |
| 1762 | /* Call the transport manager's upstream message callback. |
| 1763 | */ |
| 1764 | mgr->on_rx_msg(mgr->endpt, PJ_SUCCESS, rdata); |
| 1765 | |
| 1766 | |
| 1767 | finish_process_fragment: |
| 1768 | total_processed += msg_fragment_size; |
| 1769 | current_pkt += msg_fragment_size; |
| 1770 | remaining_len -= msg_fragment_size; |
| 1771 | |
| 1772 | } /* while (rdata->pkt_info.len > 0) */ |
| 1773 | |
| 1774 | |
| 1775 | return total_processed; |
| 1776 | } |
| 1777 | |
| 1778 | |
| 1779 | /* |
| 1780 | * pjsip_tpmgr_acquire_transport() |
| 1781 | * |
| 1782 | * Get transport suitable to communicate to remote. Create a new one |
| 1783 | * if necessary. |
| 1784 | */ |
| 1785 | PJ_DEF(pj_status_t) pjsip_tpmgr_acquire_transport(pjsip_tpmgr *mgr, |
| 1786 | pjsip_transport_type_e type, |
| 1787 | const pj_sockaddr_t *remote, |
| 1788 | int addr_len, |
| 1789 | const pjsip_tpselector *sel, |
| 1790 | pjsip_transport **tp) |
| 1791 | { |
| 1792 | return pjsip_tpmgr_acquire_transport2(mgr, type, remote, addr_len, sel, |
| 1793 | NULL, tp); |
| 1794 | } |
| 1795 | |
| 1796 | /* |
| 1797 | * pjsip_tpmgr_acquire_transport2() |
| 1798 | * |
| 1799 | * Get transport suitable to communicate to remote. Create a new one |
| 1800 | * if necessary. |
| 1801 | */ |
| 1802 | PJ_DEF(pj_status_t) pjsip_tpmgr_acquire_transport2(pjsip_tpmgr *mgr, |
| 1803 | pjsip_transport_type_e type, |
| 1804 | const pj_sockaddr_t *remote, |
| 1805 | int addr_len, |
| 1806 | const pjsip_tpselector *sel, |
| 1807 | pjsip_tx_data *tdata, |
| 1808 | pjsip_transport **tp) |
| 1809 | { |
| 1810 | pjsip_tpfactory *factory; |
| 1811 | pj_status_t status; |
| 1812 | |
| 1813 | TRACE_((THIS_FILE,"Acquiring transport type=%s, remote=%s:%d", |
| 1814 | pjsip_transport_get_type_name(type), |
| 1815 | addr_string(remote), |
| 1816 | pj_sockaddr_get_port(remote))); |
| 1817 | |
| 1818 | pj_lock_acquire(mgr->lock); |
| 1819 | |
| 1820 | /* If transport is specified, then just use it if it is suitable |
| 1821 | * for the destination. |
| 1822 | */ |
| 1823 | if (sel && sel->type == PJSIP_TPSELECTOR_TRANSPORT && |
| 1824 | sel->u.transport) |
| 1825 | { |
| 1826 | pjsip_transport *seltp = sel->u.transport; |
| 1827 | |
| 1828 | /* See if the transport is (not) suitable */ |
| 1829 | if (seltp->key.type != type) { |
| 1830 | pj_lock_release(mgr->lock); |
| 1831 | return PJSIP_ETPNOTSUITABLE; |
| 1832 | } |
| 1833 | |
| 1834 | /* We could also verify that the destination address is reachable |
| 1835 | * from this transport (i.e. both are equal), but if application |
| 1836 | * has requested a specific transport to be used, assume that |
| 1837 | * it knows what to do. |
| 1838 | * |
| 1839 | * In other words, I don't think destination verification is a good |
| 1840 | * idea for now. |
| 1841 | */ |
| 1842 | |
| 1843 | /* Transport looks to be suitable to use, so just use it. */ |
| 1844 | pjsip_transport_add_ref(seltp); |
| 1845 | pj_lock_release(mgr->lock); |
| 1846 | *tp = seltp; |
| 1847 | |
| 1848 | TRACE_((THIS_FILE, "Transport %s acquired", seltp->obj_name)); |
| 1849 | return PJ_SUCCESS; |
| 1850 | |
| 1851 | |
| 1852 | } else if (sel && sel->type == PJSIP_TPSELECTOR_LISTENER && |
| 1853 | sel->u.listener) |
| 1854 | { |
| 1855 | /* Application has requested that a specific listener is to |
| 1856 | * be used. In this case, skip transport hash table lookup. |
| 1857 | */ |
| 1858 | |
| 1859 | /* Verify that the listener type matches the destination type */ |
| 1860 | if (sel->u.listener->type != type) { |
| 1861 | pj_lock_release(mgr->lock); |
| 1862 | return PJSIP_ETPNOTSUITABLE; |
| 1863 | } |
| 1864 | |
| 1865 | /* We'll use this listener to create transport */ |
| 1866 | factory = sel->u.listener; |
| 1867 | |
| 1868 | } else { |
| 1869 | |
| 1870 | /* |
| 1871 | * This is the "normal" flow, where application doesn't specify |
| 1872 | * specific transport/listener to be used to send message to. |
| 1873 | * In this case, lookup the transport from the hash table. |
| 1874 | */ |
| 1875 | pjsip_transport_key key; |
| 1876 | int key_len; |
| 1877 | pjsip_transport *transport; |
| 1878 | |
| 1879 | pj_bzero(&key, sizeof(key)); |
| 1880 | key_len = sizeof(key.type) + addr_len; |
| 1881 | |
| 1882 | /* First try to get exact destination. */ |
| 1883 | key.type = type; |
| 1884 | pj_memcpy(&key.rem_addr, remote, addr_len); |
| 1885 | |
| 1886 | transport = (pjsip_transport*) |
| 1887 | pj_hash_get(mgr->table, &key, key_len, NULL); |
| 1888 | |
| 1889 | if (transport == NULL) { |
| 1890 | unsigned flag = pjsip_transport_get_flag_from_type(type); |
| 1891 | const pj_sockaddr *remote_addr = (const pj_sockaddr*)remote; |
| 1892 | |
| 1893 | |
| 1894 | /* Ignore address for loop transports. */ |
| 1895 | if (type == PJSIP_TRANSPORT_LOOP || |
| 1896 | type == PJSIP_TRANSPORT_LOOP_DGRAM) |
| 1897 | { |
| 1898 | pj_sockaddr *addr = &key.rem_addr; |
| 1899 | |
| 1900 | pj_bzero(addr, addr_len); |
| 1901 | key_len = sizeof(key.type) + addr_len; |
| 1902 | transport = (pjsip_transport*) |
| 1903 | pj_hash_get(mgr->table, &key, key_len, NULL); |
| 1904 | } |
| 1905 | /* For datagram transports, try lookup with zero address. |
| 1906 | */ |
| 1907 | else if (flag & PJSIP_TRANSPORT_DATAGRAM) |
| 1908 | { |
| 1909 | pj_sockaddr *addr = &key.rem_addr; |
| 1910 | |
| 1911 | pj_bzero(addr, addr_len); |
| 1912 | addr->addr.sa_family = remote_addr->addr.sa_family; |
| 1913 | |
| 1914 | key_len = sizeof(key.type) + addr_len; |
| 1915 | transport = (pjsip_transport*) |
| 1916 | pj_hash_get(mgr->table, &key, key_len, NULL); |
| 1917 | } |
| 1918 | } |
| 1919 | |
| 1920 | if (transport!=NULL && !transport->is_shutdown) { |
| 1921 | /* |
| 1922 | * Transport found! |
| 1923 | */ |
| 1924 | pjsip_transport_add_ref(transport); |
| 1925 | pj_lock_release(mgr->lock); |
| 1926 | *tp = transport; |
| 1927 | |
| 1928 | TRACE_((THIS_FILE, "Transport %s acquired", transport->obj_name)); |
| 1929 | return PJ_SUCCESS; |
| 1930 | } |
| 1931 | |
| 1932 | /* |
| 1933 | * Transport not found! |
| 1934 | * Find factory that can create such transport. |
| 1935 | */ |
| 1936 | factory = mgr->factory_list.next; |
| 1937 | while (factory != &mgr->factory_list) { |
| 1938 | if (factory->type == type) |
| 1939 | break; |
| 1940 | factory = factory->next; |
| 1941 | } |
| 1942 | |
| 1943 | if (factory == &mgr->factory_list) { |
| 1944 | /* No factory can create the transport! */ |
| 1945 | pj_lock_release(mgr->lock); |
| 1946 | TRACE_((THIS_FILE, "No suitable factory was found either")); |
| 1947 | return PJSIP_EUNSUPTRANSPORT; |
| 1948 | } |
| 1949 | } |
| 1950 | |
| 1951 | TRACE_((THIS_FILE, "Creating new transport from factory")); |
| 1952 | |
| 1953 | /* Request factory to create transport. */ |
| 1954 | if (factory->create_transport2) { |
| 1955 | status = factory->create_transport2(factory, mgr, mgr->endpt, |
| 1956 | (const pj_sockaddr*) remote, |
| 1957 | addr_len, tdata, tp); |
| 1958 | } else { |
| 1959 | status = factory->create_transport(factory, mgr, mgr->endpt, |
| 1960 | (const pj_sockaddr*) remote, |
| 1961 | addr_len, tp); |
| 1962 | } |
| 1963 | if (status == PJ_SUCCESS) { |
| 1964 | PJ_ASSERT_ON_FAIL(tp!=NULL, |
| 1965 | {pj_lock_release(mgr->lock); return PJ_EBUG;}); |
| 1966 | pjsip_transport_add_ref(*tp); |
| 1967 | } |
| 1968 | pj_lock_release(mgr->lock); |
| 1969 | return status; |
| 1970 | } |
| 1971 | |
| 1972 | /** |
| 1973 | * Dump transport info. |
| 1974 | */ |
| 1975 | PJ_DEF(void) pjsip_tpmgr_dump_transports(pjsip_tpmgr *mgr) |
| 1976 | { |
| 1977 | #if PJ_LOG_MAX_LEVEL >= 3 |
| 1978 | pj_hash_iterator_t itr_val; |
| 1979 | pj_hash_iterator_t *itr; |
| 1980 | pjsip_tpfactory *factory; |
| 1981 | |
| 1982 | pj_lock_acquire(mgr->lock); |
| 1983 | |
| 1984 | #if defined(PJ_DEBUG) && PJ_DEBUG!=0 |
| 1985 | PJ_LOG(3,(THIS_FILE, " Outstanding transmit buffers: %d", |
| 1986 | pj_atomic_get(mgr->tdata_counter))); |
| 1987 | #endif |
| 1988 | |
| 1989 | PJ_LOG(3, (THIS_FILE, " Dumping listeners:")); |
| 1990 | factory = mgr->factory_list.next; |
| 1991 | while (factory != &mgr->factory_list) { |
| 1992 | PJ_LOG(3, (THIS_FILE, " %s %s:%.*s:%d", |
| 1993 | factory->obj_name, |
| 1994 | factory->type_name, |
| 1995 | (int)factory->addr_name.host.slen, |
| 1996 | factory->addr_name.host.ptr, |
| 1997 | (int)factory->addr_name.port)); |
| 1998 | factory = factory->next; |
| 1999 | } |
| 2000 | |
| 2001 | itr = pj_hash_first(mgr->table, &itr_val); |
| 2002 | if (itr) { |
| 2003 | PJ_LOG(3, (THIS_FILE, " Dumping transports:")); |
| 2004 | |
| 2005 | do { |
| 2006 | pjsip_transport *t = (pjsip_transport*) |
| 2007 | pj_hash_this(mgr->table, itr); |
| 2008 | |
| 2009 | PJ_LOG(3, (THIS_FILE, " %s %s (refcnt=%d%s)", |
| 2010 | t->obj_name, |
| 2011 | t->info, |
| 2012 | pj_atomic_get(t->ref_cnt), |
| 2013 | (t->idle_timer.id ? " [idle]" : ""))); |
| 2014 | |
| 2015 | itr = pj_hash_next(mgr->table, itr); |
| 2016 | } while (itr); |
| 2017 | } |
| 2018 | |
| 2019 | pj_lock_release(mgr->lock); |
| 2020 | #else |
| 2021 | PJ_UNUSED_ARG(mgr); |
| 2022 | #endif |
| 2023 | } |
| 2024 | |
| 2025 | /** |
| 2026 | * Set callback of global transport state notification. |
| 2027 | */ |
| 2028 | PJ_DEF(pj_status_t) pjsip_tpmgr_set_state_cb(pjsip_tpmgr *mgr, |
| 2029 | pjsip_tp_state_callback cb) |
| 2030 | { |
| 2031 | PJ_ASSERT_RETURN(mgr, PJ_EINVAL); |
| 2032 | |
| 2033 | mgr->tp_state_cb = cb; |
| 2034 | |
| 2035 | return PJ_SUCCESS; |
| 2036 | } |
| 2037 | |
| 2038 | /** |
| 2039 | * Get callback of global transport state notification. |
| 2040 | */ |
| 2041 | PJ_DEF(pjsip_tp_state_callback) pjsip_tpmgr_get_state_cb( |
| 2042 | const pjsip_tpmgr *mgr) |
| 2043 | { |
| 2044 | PJ_ASSERT_RETURN(mgr, NULL); |
| 2045 | |
| 2046 | return mgr->tp_state_cb; |
| 2047 | } |
| 2048 | |
| 2049 | |
| 2050 | /** |
| 2051 | * Allocate and init transport data. |
| 2052 | */ |
| 2053 | static void init_tp_data(pjsip_transport *tp) |
| 2054 | { |
| 2055 | transport_data *tp_data; |
| 2056 | |
| 2057 | pj_assert(tp && !tp->data); |
| 2058 | |
| 2059 | tp_data = PJ_POOL_ZALLOC_T(tp->pool, transport_data); |
| 2060 | pj_list_init(&tp_data->st_listeners); |
| 2061 | pj_list_init(&tp_data->st_listeners_empty); |
| 2062 | tp->data = tp_data; |
| 2063 | } |
| 2064 | |
| 2065 | |
| 2066 | static void tp_state_callback(pjsip_transport *tp, |
| 2067 | pjsip_transport_state state, |
| 2068 | const pjsip_transport_state_info *info) |
| 2069 | { |
| 2070 | transport_data *tp_data; |
| 2071 | |
| 2072 | pj_lock_acquire(tp->lock); |
| 2073 | |
| 2074 | tp_data = (transport_data*)tp->data; |
| 2075 | |
| 2076 | /* Notify the transport state listeners, if any. */ |
| 2077 | if (!tp_data || pj_list_empty(&tp_data->st_listeners)) { |
| 2078 | goto on_return; |
| 2079 | } else { |
| 2080 | pjsip_transport_state_info st_info; |
| 2081 | tp_state_listener *st_listener = tp_data->st_listeners.next; |
| 2082 | |
| 2083 | /* As we need to put the user data into the transport state info, |
| 2084 | * let's use a copy of transport state info. |
| 2085 | */ |
| 2086 | pj_memcpy(&st_info, info, sizeof(st_info)); |
| 2087 | while (st_listener != &tp_data->st_listeners) { |
| 2088 | st_info.user_data = st_listener->user_data; |
| 2089 | (*st_listener->cb)(tp, state, &st_info); |
| 2090 | |
| 2091 | st_listener = st_listener->next; |
| 2092 | } |
| 2093 | } |
| 2094 | |
| 2095 | on_return: |
| 2096 | pj_lock_release(tp->lock); |
| 2097 | } |
| 2098 | |
| 2099 | |
| 2100 | /** |
| 2101 | * Add a listener to the specified transport for transport state notification. |
| 2102 | */ |
| 2103 | PJ_DEF(pj_status_t) pjsip_transport_add_state_listener ( |
| 2104 | pjsip_transport *tp, |
| 2105 | pjsip_tp_state_callback cb, |
| 2106 | void *user_data, |
| 2107 | pjsip_tp_state_listener_key **key) |
| 2108 | { |
| 2109 | transport_data *tp_data; |
| 2110 | tp_state_listener *entry; |
| 2111 | |
| 2112 | PJ_ASSERT_RETURN(tp && cb && key, PJ_EINVAL); |
| 2113 | |
| 2114 | pj_lock_acquire(tp->lock); |
| 2115 | |
| 2116 | /* Init transport data, if it hasn't */ |
| 2117 | if (!tp->data) |
| 2118 | init_tp_data(tp); |
| 2119 | |
| 2120 | tp_data = (transport_data*)tp->data; |
| 2121 | |
| 2122 | /* Init the new listener entry. Use available empty slot, if any, |
| 2123 | * otherwise allocate it using the transport pool. |
| 2124 | */ |
| 2125 | if (!pj_list_empty(&tp_data->st_listeners_empty)) { |
| 2126 | entry = tp_data->st_listeners_empty.next; |
| 2127 | pj_list_erase(entry); |
| 2128 | } else { |
| 2129 | entry = PJ_POOL_ZALLOC_T(tp->pool, tp_state_listener); |
| 2130 | } |
| 2131 | entry->cb = cb; |
| 2132 | entry->user_data = user_data; |
| 2133 | |
| 2134 | /* Add the new listener entry to the listeners list */ |
| 2135 | pj_list_push_back(&tp_data->st_listeners, entry); |
| 2136 | |
| 2137 | *key = entry; |
| 2138 | |
| 2139 | pj_lock_release(tp->lock); |
| 2140 | |
| 2141 | return PJ_SUCCESS; |
| 2142 | } |
| 2143 | |
| 2144 | /** |
| 2145 | * Remove a listener from the specified transport for transport state |
| 2146 | * notification. |
| 2147 | */ |
| 2148 | PJ_DEF(pj_status_t) pjsip_transport_remove_state_listener ( |
| 2149 | pjsip_transport *tp, |
| 2150 | pjsip_tp_state_listener_key *key, |
| 2151 | const void *user_data) |
| 2152 | { |
| 2153 | transport_data *tp_data; |
| 2154 | tp_state_listener *entry; |
| 2155 | |
| 2156 | PJ_ASSERT_RETURN(tp && key, PJ_EINVAL); |
| 2157 | |
| 2158 | pj_lock_acquire(tp->lock); |
| 2159 | |
| 2160 | tp_data = (transport_data*)tp->data; |
| 2161 | |
| 2162 | /* Transport data is NULL or no registered listener? */ |
| 2163 | if (!tp_data || pj_list_empty(&tp_data->st_listeners)) { |
| 2164 | pj_lock_release(tp->lock); |
| 2165 | return PJ_ENOTFOUND; |
| 2166 | } |
| 2167 | |
| 2168 | entry = (tp_state_listener*)key; |
| 2169 | |
| 2170 | /* Validate the user data */ |
| 2171 | if (entry->user_data != user_data) { |
| 2172 | pj_assert(!"Invalid transport state listener key"); |
| 2173 | pj_lock_release(tp->lock); |
| 2174 | return PJ_EBUG; |
| 2175 | } |
| 2176 | |
| 2177 | /* Reset the entry and move it to the empty list */ |
| 2178 | entry->cb = NULL; |
| 2179 | entry->user_data = NULL; |
| 2180 | pj_list_erase(entry); |
| 2181 | pj_list_push_back(&tp_data->st_listeners_empty, entry); |
| 2182 | |
| 2183 | pj_lock_release(tp->lock); |
| 2184 | |
| 2185 | return PJ_SUCCESS; |
| 2186 | } |