main/rtp_engine.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 1999 - 2008, Digium, Inc.
   5  *
   6  * Joshua Colp <jcolp@digium.com>
   7  *
   8  * See http://www.asterisk.org for more information about
   9  * the Asterisk project. Please do not directly contact
  10  * any of the maintainers of this project for assistance;
  11  * the project provides a web site, mailing lists and IRC
  12  * channels for your use.
  13  *
  14  * This program is free software, distributed under the terms of
  15  * the GNU General Public License Version 2. See the LICENSE file
  16  * at the top of the source tree.
  17  */
  18
  19 /*! \file
  20  *
  21  * \brief Pluggable RTP Architecture
  22  *
  23  * \author Joshua Colp <jcolp@digium.com>
  24  */
  25
  26 /*** MODULEINFO
  27         <support_level>core</support_level>
  28  ***/
  29
  30 #include "asterisk.h"
  31
  32 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  33
  34 #include <math.h>
  35
  36 #include "asterisk/channel.h"
  37 #include "asterisk/frame.h"
  38 #include "asterisk/module.h"
  39 #include "asterisk/rtp_engine.h"
  40 #include "asterisk/manager.h"
  41 #include "asterisk/options.h"
  42 #include "asterisk/astobj2.h"
  43 #include "asterisk/pbx.h"
  44 #include "asterisk/translate.h"
  45 #include "asterisk/netsock2.h"
  46 #include "asterisk/_private.h"
  47 #include "asterisk/framehook.h"
  48
  49 struct ast_srtp_res *res_srtp = NULL;
  50 struct ast_srtp_policy_res *res_srtp_policy = NULL;
  51
  52 /*! Structure that represents an RTP session (instance) */
  53 struct ast_rtp_instance {
  54         /*! Engine that is handling this RTP instance */
  55         struct ast_rtp_engine *engine;
  56         /*! Data unique to the RTP engine */
  57         void *data;
  58         /*! RTP properties that have been set and their value */
  59         int properties[AST_RTP_PROPERTY_MAX];
  60         /*! Address that we are expecting RTP to come in to */
  61         struct ast_sockaddr local_address;
  62         /*! Address that we are sending RTP to */
  63         struct ast_sockaddr remote_address;
  64         /*! Alternate address that we are receiving RTP from */
  65         struct ast_sockaddr alt_remote_address;
  66         /*! Instance that we are bridged to if doing remote or local bridging */
  67         struct ast_rtp_instance *bridged;
  68         /*! Payload and packetization information */
  69         struct ast_rtp_codecs codecs;
  70         /*! RTP timeout time (negative or zero means disabled, negative value means temporarily disabled) */
  71         int timeout;
  72         /*! RTP timeout when on hold (negative or zero means disabled, negative value means temporarily disabled). */
  73         int holdtimeout;
  74         /*! RTP keepalive interval */
  75         int keepalive;
  76         /*! Glue currently in use */
  77         struct ast_rtp_glue *glue;
  78         /*! Channel associated with the instance */
  79         struct ast_channel *chan;
  80         /*! SRTP info associated with the instance */
  81         struct ast_srtp *srtp;
  82 };
  83
  84 /*! List of RTP engines that are currently registered */
  85 static AST_RWLIST_HEAD_STATIC(engines, ast_rtp_engine);
  86
  87 /*! List of RTP glues */
  88 static AST_RWLIST_HEAD_STATIC(glues, ast_rtp_glue);
  89
  90 /*! The following array defines the MIME Media type (and subtype) for each
  91    of our codecs, or RTP-specific data type. */
  92 static struct ast_rtp_mime_type {
  93         struct ast_rtp_payload_type payload_type;
  94         char *type;
  95         char *subtype;
  96         unsigned int sample_rate;
  97 } ast_rtp_mime_types[128]; /* This will Likely not need to grow any time soon. */
  98 static ast_rwlock_t mime_types_lock;
  99 static int mime_types_len = 0;
 100
 101 /*!
 102  * \brief Mapping between Asterisk codecs and rtp payload types
 103  *
 104  * Static (i.e., well-known) RTP payload types for our "AST_FORMAT..."s:
 105  * also, our own choices for dynamic payload types.  This is our master
 106  * table for transmission
 107  *
 108  * See http://www.iana.org/assignments/rtp-parameters for a list of
 109  * assigned values
 110  */
 111 static struct ast_rtp_payload_type static_RTP_PT[AST_RTP_MAX_PT];
 112 static ast_rwlock_t static_RTP_PT_lock;
 113
 114 int ast_rtp_engine_register2(struct ast_rtp_engine *engine, struct ast_module *module)
 115 {
 116         struct ast_rtp_engine *current_engine;
 117
 118         /* Perform a sanity check on the engine structure to make sure it has the basics */
 119         if (ast_strlen_zero(engine->name) || !engine->new || !engine->destroy || !engine->write || !engine->read) {
 120                 ast_log(LOG_WARNING, "RTP Engine '%s' failed sanity check so it was not registered.\n", !ast_strlen_zero(engine->name) ? engine->name : "Unknown");
 121                 return -1;
 122         }
 123
 124         /* Link owner module to the RTP engine for reference counting purposes */
 125         engine->mod = module;
 126
 127         AST_RWLIST_WRLOCK(&engines);
 128
 129         /* Ensure that no two modules with the same name are registered at the same time */
 130         AST_RWLIST_TRAVERSE(&engines, current_engine, entry) {
 131                 if (!strcmp(current_engine->name, engine->name)) {
 132                         ast_log(LOG_WARNING, "An RTP engine with the name '%s' has already been registered.\n", engine->name);
 133                         AST_RWLIST_UNLOCK(&engines);
 134                         return -1;
 135                 }
 136         }
 137
 138         /* The engine survived our critique. Off to the list it goes to be used */
 139         AST_RWLIST_INSERT_TAIL(&engines, engine, entry);
 140
 141         AST_RWLIST_UNLOCK(&engines);
 142
 143         ast_verb(2, "Registered RTP engine '%s'\n", engine->name);
 144
 145         return 0;
 146 }
 147
 148 int ast_rtp_engine_unregister(struct ast_rtp_engine *engine)
 149 {
 150         struct ast_rtp_engine *current_engine = NULL;
 151
 152         AST_RWLIST_WRLOCK(&engines);
 153
 154         if ((current_engine = AST_RWLIST_REMOVE(&engines, engine, entry))) {
 155                 ast_verb(2, "Unregistered RTP engine '%s'\n", engine->name);
 156         }
 157
 158         AST_RWLIST_UNLOCK(&engines);
 159
 160         return current_engine ? 0 : -1;
 161 }
 162
 163 int ast_rtp_glue_register2(struct ast_rtp_glue *glue, struct ast_module *module)
 164 {
 165         struct ast_rtp_glue *current_glue = NULL;
 166
 167         if (ast_strlen_zero(glue->type)) {
 168                 return -1;
 169         }
 170
 171         glue->mod = module;
 172
 173         AST_RWLIST_WRLOCK(&glues);
 174
 175         AST_RWLIST_TRAVERSE(&glues, current_glue, entry) {
 176                 if (!strcasecmp(current_glue->type, glue->type)) {
 177                         ast_log(LOG_WARNING, "RTP glue with the name '%s' has already been registered.\n", glue->type);
 178                         AST_RWLIST_UNLOCK(&glues);
 179                         return -1;
 180                 }
 181         }
 182
 183         AST_RWLIST_INSERT_TAIL(&glues, glue, entry);
 184
 185         AST_RWLIST_UNLOCK(&glues);
 186
 187         ast_verb(2, "Registered RTP glue '%s'\n", glue->type);
 188
 189         return 0;
 190 }
 191
 192 int ast_rtp_glue_unregister(struct ast_rtp_glue *glue)
 193 {
 194         struct ast_rtp_glue *current_glue = NULL;
 195
 196         AST_RWLIST_WRLOCK(&glues);
 197
 198         if ((current_glue = AST_RWLIST_REMOVE(&glues, glue, entry))) {
 199                 ast_verb(2, "Unregistered RTP glue '%s'\n", glue->type);
 200         }
 201
 202         AST_RWLIST_UNLOCK(&glues);
 203
 204         return current_glue ? 0 : -1;
 205 }
 206
 207 static void instance_destructor(void *obj)
 208 {
 209         struct ast_rtp_instance *instance = obj;
 210
 211         /* Pass us off to the engine to destroy */
 212         if (instance->data && instance->engine->destroy(instance)) {
 213                 ast_debug(1, "Engine '%s' failed to destroy RTP instance '%p'\n", instance->engine->name, instance);
 214                 return;
 215         }
 216
 217         if (instance->srtp) {
 218                 res_srtp->destroy(instance->srtp);
 219         }
 220
 221         ast_rtp_codecs_payloads_destroy(&instance->codecs);
 222
 223         /* Drop our engine reference */
 224         ast_module_unref(instance->engine->mod);
 225
 226         ast_debug(1, "Destroyed RTP instance '%p'\n", instance);
 227 }
 228
 229 int ast_rtp_instance_destroy(struct ast_rtp_instance *instance)
 230 {
 231         ao2_ref(instance, -1);
 232
 233         return 0;
 234 }
 235
 236 struct ast_rtp_instance *ast_rtp_instance_new(const char *engine_name,
 237                 struct ast_sched_context *sched, const struct ast_sockaddr *sa,
 238                 void *data)
 239 {
 240         struct ast_sockaddr address = {{0,}};
 241         struct ast_rtp_instance *instance = NULL;
 242         struct ast_rtp_engine *engine = NULL;
 243
 244         AST_RWLIST_RDLOCK(&engines);
 245
 246         /* If an engine name was specified try to use it or otherwise use the first one registered */
 247         if (!ast_strlen_zero(engine_name)) {
 248                 AST_RWLIST_TRAVERSE(&engines, engine, entry) {
 249                         if (!strcmp(engine->name, engine_name)) {
 250                                 break;
 251                         }
 252                 }
 253         } else {
 254                 engine = AST_RWLIST_FIRST(&engines);
 255         }
 256
 257         /* If no engine was actually found bail out now */
 258         if (!engine) {
 259                 ast_log(LOG_ERROR, "No RTP engine was found. Do you have one loaded?\n");
 260                 AST_RWLIST_UNLOCK(&engines);
 261                 return NULL;
 262         }
 263
 264         /* Bump up the reference count before we return so the module can not be unloaded */
 265         ast_module_ref(engine->mod);
 266
 267         AST_RWLIST_UNLOCK(&engines);
 268
 269         /* Allocate a new RTP instance */
 270         if (!(instance = ao2_alloc(sizeof(*instance), instance_destructor))) {
 271                 ast_module_unref(engine->mod);
 272                 return NULL;
 273         }
 274         instance->engine = engine;
 275         ast_sockaddr_copy(&instance->local_address, sa);
 276         ast_sockaddr_copy(&address, sa);
 277
 278         if (ast_rtp_codecs_payloads_initialize(&instance->codecs)) {
 279                 ao2_ref(instance, -1);
 280                 return NULL;
 281         }
 282
 283         ast_debug(1, "Using engine '%s' for RTP instance '%p'\n", engine->name, instance);
 284
 285         /* And pass it off to the engine to setup */
 286         if (instance->engine->new(instance, sched, &address, data)) {
 287                 ast_debug(1, "Engine '%s' failed to setup RTP instance '%p'\n", engine->name, instance);
 288                 ao2_ref(instance, -1);
 289                 return NULL;
 290         }
 291
 292         ast_debug(1, "RTP instance '%p' is setup and ready to go\n", instance);
 293
 294         return instance;
 295 }
 296
 297 void ast_rtp_instance_set_data(struct ast_rtp_instance *instance, void *data)
 298 {
 299         instance->data = data;
 300 }
 301
 302 void *ast_rtp_instance_get_data(struct ast_rtp_instance *instance)
 303 {
 304         return instance->data;
 305 }
 306
 307 int ast_rtp_instance_write(struct ast_rtp_instance *instance, struct ast_frame *frame)
 308 {
 309         return instance->engine->write(instance, frame);
 310 }
 311
 312 struct ast_frame *ast_rtp_instance_read(struct ast_rtp_instance *instance, int rtcp)
 313 {
 314         return instance->engine->read(instance, rtcp);
 315 }
 316
 317 int ast_rtp_instance_set_local_address(struct ast_rtp_instance *instance,
 318                 const struct ast_sockaddr *address)
 319 {
 320         ast_sockaddr_copy(&instance->local_address, address);
 321         return 0;
 322 }
 323
 324 int ast_rtp_instance_set_remote_address(struct ast_rtp_instance *instance,
 325                 const struct ast_sockaddr *address)
 326 {
 327         ast_sockaddr_copy(&instance->remote_address, address);
 328
 329         /* moo */
 330
 331         if (instance->engine->remote_address_set) {
 332                 instance->engine->remote_address_set(instance, &instance->remote_address);
 333         }
 334
 335         return 0;
 336 }
 337
 338 int ast_rtp_instance_set_alt_remote_address(struct ast_rtp_instance *instance,
 339                 const struct ast_sockaddr *address)
 340 {
 341         ast_sockaddr_copy(&instance->alt_remote_address, address);
 342
 343         /* oink */
 344
 345         if (instance->engine->alt_remote_address_set) {
 346                 instance->engine->alt_remote_address_set(instance, &instance->alt_remote_address);
 347         }
 348
 349         return 0;
 350 }
 351
 352 int ast_rtp_instance_get_and_cmp_local_address(struct ast_rtp_instance *instance,
 353                 struct ast_sockaddr *address)
 354 {
 355         if (ast_sockaddr_cmp(address, &instance->local_address) != 0) {
 356                 ast_sockaddr_copy(address, &instance->local_address);
 357                 return 1;
 358         }
 359
 360         return 0;
 361 }
 362
 363 void ast_rtp_instance_get_local_address(struct ast_rtp_instance *instance,
 364                 struct ast_sockaddr *address)
 365 {
 366         ast_sockaddr_copy(address, &instance->local_address);
 367 }
 368
 369 int ast_rtp_instance_get_and_cmp_remote_address(struct ast_rtp_instance *instance,
 370                 struct ast_sockaddr *address)
 371 {
 372         if (ast_sockaddr_cmp(address, &instance->remote_address) != 0) {
 373                 ast_sockaddr_copy(address, &instance->remote_address);
 374                 return 1;
 375         }
 376
 377         return 0;
 378 }
 379
 380 void ast_rtp_instance_get_remote_address(struct ast_rtp_instance *instance,
 381                 struct ast_sockaddr *address)
 382 {
 383         ast_sockaddr_copy(address, &instance->remote_address);
 384 }
 385
 386 void ast_rtp_instance_set_extended_prop(struct ast_rtp_instance *instance, int property, void *value)
 387 {
 388         if (instance->engine->extended_prop_set) {
 389                 instance->engine->extended_prop_set(instance, property, value);
 390         }
 391 }
 392
 393 void *ast_rtp_instance_get_extended_prop(struct ast_rtp_instance *instance, int property)
 394 {
 395         if (instance->engine->extended_prop_get) {
 396                 return instance->engine->extended_prop_get(instance, property);
 397         }
 398
 399         return NULL;
 400 }
 401
 402 void ast_rtp_instance_set_prop(struct ast_rtp_instance *instance, enum ast_rtp_property property, int value)
 403 {
 404         instance->properties[property] = value;
 405
 406         if (instance->engine->prop_set) {
 407                 instance->engine->prop_set(instance, property, value);
 408         }
 409 }
 410
 411 int ast_rtp_instance_get_prop(struct ast_rtp_instance *instance, enum ast_rtp_property property)
 412 {
 413         return instance->properties[property];
 414 }
 415
 416 struct ast_rtp_codecs *ast_rtp_instance_get_codecs(struct ast_rtp_instance *instance)
 417 {
 418         return &instance->codecs;
 419 }
 420
 421 static int rtp_payload_type_hash(const void *obj, const int flags)
 422 {
 423         const struct ast_rtp_payload_type *type = obj;
 424         const int *payload = obj;
 425
 426         return (flags & OBJ_KEY) ? *payload : type->payload;
 427 }
 428
 429 static int rtp_payload_type_cmp(void *obj, void *arg, int flags)
 430 {
 431         struct ast_rtp_payload_type *type1 = obj, *type2 = arg;
 432         const int *payload = arg;
 433
 434         return (type1->payload == (OBJ_KEY ? *payload : type2->payload)) ? CMP_MATCH | CMP_STOP : 0;
 435 }
 436
 437 int ast_rtp_codecs_payloads_initialize(struct ast_rtp_codecs *codecs)
 438 {
 439         if (!(codecs->payloads = ao2_container_alloc(AST_RTP_MAX_PT, rtp_payload_type_hash, rtp_payload_type_cmp))) {
 440                 return -1;
 441         }
 442
 443         return 0;
 444 }
 445
 446 void ast_rtp_codecs_payloads_destroy(struct ast_rtp_codecs *codecs)
 447 {
 448         ao2_cleanup(codecs->payloads);
 449 }
 450
 451 void ast_rtp_codecs_payloads_clear(struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance)
 452 {
 453         ast_rtp_codecs_payloads_destroy(codecs);
 454
 455         if (instance && instance->engine && instance->engine->payload_set) {
 456                 int i;
 457                 for (i = 0; i < AST_RTP_MAX_PT; i++) {
 458                         instance->engine->payload_set(instance, i, 0, NULL, 0);
 459                 }
 460         }
 461
 462         ast_rtp_codecs_payloads_initialize(codecs);
 463 }
 464
 465 void ast_rtp_codecs_payloads_default(struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance)
 466 {
 467         int i;
 468
 469         ast_rwlock_rdlock(&static_RTP_PT_lock);
 470         for (i = 0; i < AST_RTP_MAX_PT; i++) {
 471                 if (static_RTP_PT[i].rtp_code || static_RTP_PT[i].asterisk_format) {
 472                         struct ast_rtp_payload_type *type;
 473
 474                         if (!(type = ao2_alloc(sizeof(*type), NULL))) {
 475                                 /* Unfortunately if this occurs the payloads container will not contain all possible default payloads
 476                                  * but we err on the side of doing what we can in the hopes that the extreme memory conditions which
 477                                  * caused this to occur will go away.
 478                                  */
 479                                 continue;
 480                         }
 481
 482                         type->payload = i;
 483                         type->asterisk_format = static_RTP_PT[i].asterisk_format;
 484                         type->rtp_code = static_RTP_PT[i].rtp_code;
 485                         ast_format_copy(&type->format, &static_RTP_PT[i].format);
 486
 487                         ao2_link_flags(codecs->payloads, type, OBJ_NOLOCK);
 488
 489                         if (instance && instance->engine && instance->engine->payload_set) {
 490                                 instance->engine->payload_set(instance, i, type->asterisk_format, &type->format, type->rtp_code);
 491                         }
 492
 493                         ao2_ref(type, -1);
 494                 }
 495         }
 496         ast_rwlock_unlock(&static_RTP_PT_lock);
 497 }
 498
 499 void ast_rtp_codecs_payloads_copy(struct ast_rtp_codecs *src, struct ast_rtp_codecs *dest, struct ast_rtp_instance *instance)
 500 {
 501         int i;
 502         struct ast_rtp_payload_type *type;
 503
 504         for (i = 0; i < AST_RTP_MAX_PT; i++) {
 505                 struct ast_rtp_payload_type *new_type;
 506
 507                 if (!(type = ao2_find(src->payloads, &i, OBJ_KEY | OBJ_NOLOCK))) {
 508                         continue;
 509                 }
 510
 511                 if (!(new_type = ao2_alloc(sizeof(*new_type), NULL))) {
 512                         continue;
 513                 }
 514
 515                 ast_debug(2, "Copying payload %d from %p to %p\n", i, src, dest);
 516
 517                 new_type->payload = i;
 518                 *new_type = *type;
 519
 520                 ao2_link_flags(dest->payloads, new_type, OBJ_NOLOCK);
 521
 522                 ao2_ref(new_type, -1);
 523
 524                 if (instance && instance->engine && instance->engine->payload_set) {
 525                         instance->engine->payload_set(instance, i, type->asterisk_format, &type->format, type->rtp_code);
 526                 }
 527
 528                 ao2_ref(type, -1);
 529         }
 530 }
 531
 532 void ast_rtp_codecs_payloads_set_m_type(struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance, int payload)
 533 {
 534         struct ast_rtp_payload_type *type;
 535
 536         ast_rwlock_rdlock(&static_RTP_PT_lock);
 537
 538         if (payload < 0 || payload >= AST_RTP_MAX_PT) {
 539                 ast_rwlock_unlock(&static_RTP_PT_lock);
 540                 return;
 541         }
 542
 543         if (!(type = ao2_find(codecs->payloads, &payload, OBJ_KEY | OBJ_NOLOCK))) {
 544                 if (!(type = ao2_alloc(sizeof(*type), NULL))) {
 545                         ast_rwlock_unlock(&static_RTP_PT_lock);
 546                         return;
 547                 }
 548                 type->payload = payload;
 549                 ao2_link_flags(codecs->payloads, type, OBJ_NOLOCK);
 550         }
 551
 552         type->asterisk_format = static_RTP_PT[payload].asterisk_format;
 553         type->rtp_code = static_RTP_PT[payload].rtp_code;
 554         type->payload = payload;
 555         ast_format_copy(&type->format, &static_RTP_PT[payload].format);
 556
 557         ast_debug(1, "Setting payload %d based on m type on %p\n", payload, codecs);
 558
 559         if (instance && instance->engine && instance->engine->payload_set) {
 560                 instance->engine->payload_set(instance, payload, type->asterisk_format, &type->format, type->rtp_code);
 561         }
 562
 563         ao2_ref(type, -1);
 564
 565         ast_rwlock_unlock(&static_RTP_PT_lock);
 566 }
 567
 568 int ast_rtp_codecs_payloads_set_rtpmap_type_rate(struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance, int pt,
 569                                  char *mimetype, char *mimesubtype,
 570                                  enum ast_rtp_options options,
 571                                  unsigned int sample_rate)
 572 {
 573         unsigned int i;
 574         int found = 0;
 575
 576         if (pt < 0 || pt >= AST_RTP_MAX_PT)
 577                 return -1; /* bogus payload type */
 578
 579         ast_rwlock_rdlock(&mime_types_lock);
 580         for (i = 0; i < mime_types_len; ++i) {
 581                 const struct ast_rtp_mime_type *t = &ast_rtp_mime_types[i];
 582                 struct ast_rtp_payload_type *type;
 583
 584                 if (strcasecmp(mimesubtype, t->subtype)) {
 585                         continue;
 586                 }
 587
 588                 if (strcasecmp(mimetype, t->type)) {
 589                         continue;
 590                 }
 591
 592                 /* if both sample rates have been supplied, and they don't match,
 593                  * then this not a match; if one has not been supplied, then the
 594                  * rates are not compared */
 595                 if (sample_rate && t->sample_rate &&
 596                     (sample_rate != t->sample_rate)) {
 597                         continue;
 598                 }
 599
 600                 found = 1;
 601
 602                 if (!(type = ao2_find(codecs->payloads, &pt, OBJ_KEY | OBJ_NOLOCK))) {
 603                         if (!(type = ao2_alloc(sizeof(*type), NULL))) {
 604                                 continue;
 605                         }
 606                         type->payload = pt;
 607                         ao2_link_flags(codecs->payloads, type, OBJ_NOLOCK);
 608                 }
 609
 610                 *type = t->payload_type;
 611                 type->payload = pt;
 612
 613                 if ((t->payload_type.format.id == AST_FORMAT_G726) && t->payload_type.asterisk_format && (options & AST_RTP_OPT_G726_NONSTANDARD)) {
 614                         ast_format_set(&type->format, AST_FORMAT_G726_AAL2, 0);
 615                 }
 616
 617                 if (instance && instance->engine && instance->engine->payload_set) {
 618                         instance->engine->payload_set(instance, pt, type->asterisk_format, &type->format, type->rtp_code);
 619                 }
 620
 621                 ao2_ref(type, -1);
 622
 623                 break;
 624         }
 625         ast_rwlock_unlock(&mime_types_lock);
 626
 627         return (found ? 0 : -2);
 628 }
 629
 630 int ast_rtp_codecs_payloads_set_rtpmap_type(struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance, int payload, char *mimetype, char *mimesubtype, enum ast_rtp_options options)
 631 {
 632         return ast_rtp_codecs_payloads_set_rtpmap_type_rate(codecs, instance, payload, mimetype, mimesubtype, options, 0);
 633 }
 634
 635 void ast_rtp_codecs_payloads_unset(struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance, int payload)
 636 {
 637         if (payload < 0 || payload >= AST_RTP_MAX_PT) {
 638                 return;
 639         }
 640
 641         ast_debug(2, "Unsetting payload %d on %p\n", payload, codecs);
 642
 643         ao2_find(codecs->payloads, &payload, OBJ_KEY | OBJ_NOLOCK | OBJ_NODATA | OBJ_UNLINK);
 644
 645         if (instance && instance->engine && instance->engine->payload_set) {
 646                 instance->engine->payload_set(instance, payload, 0, NULL, 0);
 647         }
 648 }
 649
 650 struct ast_rtp_payload_type ast_rtp_codecs_payload_lookup(struct ast_rtp_codecs *codecs, int payload)
 651 {
 652         struct ast_rtp_payload_type result = { .asterisk_format = 0, }, *type;
 653
 654         if (payload < 0 || payload >= AST_RTP_MAX_PT) {
 655                 return result;
 656         }
 657
 658         if ((type = ao2_find(codecs->payloads, &payload, OBJ_KEY | OBJ_NOLOCK))) {
 659                 result = *type;
 660                 ao2_ref(type, -1);
 661         }
 662
 663         if (!result.rtp_code && !result.asterisk_format) {
 664                 ast_rwlock_rdlock(&static_RTP_PT_lock);
 665                 result = static_RTP_PT[payload];
 666                 ast_rwlock_unlock(&static_RTP_PT_lock);
 667         }
 668
 669         return result;
 670 }
 671
 672
 673 struct ast_format *ast_rtp_codecs_get_payload_format(struct ast_rtp_codecs *codecs, int payload)
 674 {
 675         struct ast_rtp_payload_type *type;
 676         struct ast_format *format;
 677
 678         if (payload < 0 || payload >= AST_RTP_MAX_PT) {
 679                 return NULL;
 680         }
 681
 682         if (!(type = ao2_find(codecs->payloads, &payload, OBJ_KEY | OBJ_NOLOCK))) {
 683                 return NULL;
 684         }
 685
 686         format = type->asterisk_format ? &type->format : NULL;
 687
 688         ao2_ref(type, -1);
 689
 690         return format;
 691 }
 692
 693 static int rtp_payload_type_add_ast(void *obj, void *arg, int flags)
 694 {
 695         struct ast_rtp_payload_type *type = obj;
 696         struct ast_format_cap *astformats = arg;
 697
 698         if (type->asterisk_format) {
 699                 ast_format_cap_add(astformats, &type->format);
 700         }
 701
 702         return 0;
 703 }
 704
 705 static int rtp_payload_type_add_nonast(void *obj, void *arg, int flags)
 706 {
 707         struct ast_rtp_payload_type *type = obj;
 708         int *nonastformats = arg;
 709
 710         if (!type->asterisk_format) {
 711                 *nonastformats |= type->rtp_code;
 712         }
 713
 714         return 0;
 715 }
 716
 717 void ast_rtp_codecs_payload_formats(struct ast_rtp_codecs *codecs, struct ast_format_cap *astformats, int *nonastformats)
 718 {
 719         ast_format_cap_remove_all(astformats);
 720         *nonastformats = 0;
 721
 722         ao2_callback(codecs->payloads, OBJ_NODATA | OBJ_MULTIPLE | OBJ_NOLOCK, rtp_payload_type_add_ast, astformats);
 723         ao2_callback(codecs->payloads, OBJ_NODATA | OBJ_MULTIPLE | OBJ_NOLOCK, rtp_payload_type_add_nonast, nonastformats);
 724 }
 725
 726 static int rtp_payload_type_find_format(void *obj, void *arg, int flags)
 727 {
 728         struct ast_rtp_payload_type *type = obj;
 729         struct ast_format *format = arg;
 730
 731         return (type->asterisk_format && (ast_format_cmp(&type->format, format) != AST_FORMAT_CMP_NOT_EQUAL)) ? CMP_MATCH | CMP_STOP : 0;
 732 }
 733
 734 int ast_rtp_codecs_payload_code(struct ast_rtp_codecs *codecs, int asterisk_format, const struct ast_format *format, int code)
 735 {
 736         struct ast_rtp_payload_type *type;
 737         int i, res = -1;
 738
 739         if (asterisk_format && format && (type = ao2_callback(codecs->payloads, OBJ_NOLOCK, rtp_payload_type_find_format, (void*)format))) {
 740                 res = type->payload;
 741                 ao2_ref(type, -1);
 742                 return res;
 743         } else if (!asterisk_format && (type = ao2_find(codecs->payloads, &code, OBJ_NOLOCK | OBJ_KEY))) {
 744                 res = type->payload;
 745                 ao2_ref(type, -1);
 746                 return res;
 747         }
 748
 749         ast_rwlock_rdlock(&static_RTP_PT_lock);
 750         for (i = 0; i < AST_RTP_MAX_PT; i++) {
 751                 if (static_RTP_PT[i].asterisk_format && asterisk_format && format &&
 752                         (ast_format_cmp(format, &static_RTP_PT[i].format) != AST_FORMAT_CMP_NOT_EQUAL)) {
 753                         res = i;
 754                         break;
 755                 } else if (!static_RTP_PT[i].asterisk_format && !asterisk_format &&
 756                         (static_RTP_PT[i].rtp_code == code)) {
 757                         res = i;
 758                         break;
 759                 }
 760         }
 761         ast_rwlock_unlock(&static_RTP_PT_lock);
 762
 763         return res;
 764 }
 765 int ast_rtp_codecs_find_payload_code(struct ast_rtp_codecs *codecs, int code)
 766 {
 767         struct ast_rtp_payload_type *type;
 768         int res = -1;
 769
 770         /* Search the payload type in the codecs passed */
 771         if ((type = ao2_find(codecs->payloads, &code, OBJ_NOLOCK | OBJ_KEY)))
 772         {
 773                 res = type->payload;
 774                 ao2_ref(type, -1);
 775                 return res;
 776         }
 777
 778         return res;
 779 }
 780 const char *ast_rtp_lookup_mime_subtype2(const int asterisk_format, struct ast_format *format, int code, enum ast_rtp_options options)
 781 {
 782         int i;
 783         const char *res = "";
 784
 785         ast_rwlock_rdlock(&mime_types_lock);
 786         for (i = 0; i < mime_types_len; i++) {
 787                 if (ast_rtp_mime_types[i].payload_type.asterisk_format && asterisk_format && format &&
 788                         (ast_format_cmp(format, &ast_rtp_mime_types[i].payload_type.format) != AST_FORMAT_CMP_NOT_EQUAL)) {
 789                         if ((format->id == AST_FORMAT_G726_AAL2) && (options & AST_RTP_OPT_G726_NONSTANDARD)) {
 790                                 res = "G726-32";
 791                                 break;
 792                         } else {
 793                                 res = ast_rtp_mime_types[i].subtype;
 794                                 break;
 795                         }
 796                 } else if (!ast_rtp_mime_types[i].payload_type.asterisk_format && !asterisk_format &&
 797                         ast_rtp_mime_types[i].payload_type.rtp_code == code) {
 798
 799                         res = ast_rtp_mime_types[i].subtype;
 800                         break;
 801                 }
 802         }
 803         ast_rwlock_unlock(&mime_types_lock);
 804
 805         return res;
 806 }
 807
 808 unsigned int ast_rtp_lookup_sample_rate2(int asterisk_format, struct ast_format *format, int code)
 809 {
 810         unsigned int i;
 811         unsigned int res = 0;
 812
 813         ast_rwlock_rdlock(&mime_types_lock);
 814         for (i = 0; i < mime_types_len; ++i) {
 815                 if (ast_rtp_mime_types[i].payload_type.asterisk_format && asterisk_format && format &&
 816                         (ast_format_cmp(format, &ast_rtp_mime_types[i].payload_type.format) != AST_FORMAT_CMP_NOT_EQUAL)) {
 817                         res = ast_rtp_mime_types[i].sample_rate;
 818                         break;
 819                 } else if (!ast_rtp_mime_types[i].payload_type.asterisk_format && !asterisk_format &&
 820                         ast_rtp_mime_types[i].payload_type.rtp_code == code) {
 821                         res = ast_rtp_mime_types[i].sample_rate;
 822                         break;
 823                 }
 824         }
 825         ast_rwlock_unlock(&mime_types_lock);
 826
 827         return res;
 828 }
 829
 830 char *ast_rtp_lookup_mime_multiple2(struct ast_str *buf, struct ast_format_cap *ast_format_capability, int rtp_capability, const int asterisk_format, enum ast_rtp_options options)
 831 {
 832         int found = 0;
 833         const char *name;
 834         if (!buf) {
 835                 return NULL;
 836         }
 837
 838
 839         if (asterisk_format) {
 840                 struct ast_format tmp_fmt;
 841                 ast_format_cap_iter_start(ast_format_capability);
 842                 while (!ast_format_cap_iter_next(ast_format_capability, &tmp_fmt)) {
 843                         name = ast_rtp_lookup_mime_subtype2(asterisk_format, &tmp_fmt, 0, options);
 844                         ast_str_append(&buf, 0, "%s|", name);
 845                         found = 1;
 846                 }
 847                 ast_format_cap_iter_end(ast_format_capability);
 848
 849         } else {
 850                 int x;
 851                 ast_str_append(&buf, 0, "0x%x (", (unsigned int) rtp_capability);
 852                 for (x = 1; x <= AST_RTP_MAX; x <<= 1) {
 853                         if (rtp_capability & x) {
 854                                 name = ast_rtp_lookup_mime_subtype2(asterisk_format, NULL, x, options);
 855                                 ast_str_append(&buf, 0, "%s|", name);
 856                                 found = 1;
 857                         }
 858                 }
 859         }
 860
 861         ast_str_append(&buf, 0, "%s", found ? ")" : "nothing)");
 862
 863         return ast_str_buffer(buf);
 864 }
 865
 866 void ast_rtp_codecs_packetization_set(struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance, struct ast_codec_pref *prefs)
 867 {
 868         codecs->pref = *prefs;
 869
 870         if (instance && instance->engine->packetization_set) {
 871                 instance->engine->packetization_set(instance, &instance->codecs.pref);
 872         }
 873 }
 874
 875 int ast_rtp_instance_dtmf_begin(struct ast_rtp_instance *instance, char digit)
 876 {
 877         return instance->engine->dtmf_begin ? instance->engine->dtmf_begin(instance, digit) : -1;
 878 }
 879
 880 int ast_rtp_instance_dtmf_end(struct ast_rtp_instance *instance, char digit)
 881 {
 882         return instance->engine->dtmf_end ? instance->engine->dtmf_end(instance, digit) : -1;
 883 }
 884 int ast_rtp_instance_dtmf_end_with_duration(struct ast_rtp_instance *instance, char digit, unsigned int duration)
 885 {
 886         return instance->engine->dtmf_end_with_duration ? instance->engine->dtmf_end_with_duration(instance, digit, duration) : -1;
 887 }
 888
 889 int ast_rtp_instance_dtmf_mode_set(struct ast_rtp_instance *instance, enum ast_rtp_dtmf_mode dtmf_mode)
 890 {
 891         return (!instance->engine->dtmf_mode_set || instance->engine->dtmf_mode_set(instance, dtmf_mode)) ? -1 : 0;
 892 }
 893
 894 enum ast_rtp_dtmf_mode ast_rtp_instance_dtmf_mode_get(struct ast_rtp_instance *instance)
 895 {
 896         return instance->engine->dtmf_mode_get ? instance->engine->dtmf_mode_get(instance) : 0;
 897 }
 898
 899 void ast_rtp_instance_update_source(struct ast_rtp_instance *instance)
 900 {
 901         if (instance->engine->update_source) {
 902                 instance->engine->update_source(instance);
 903         }
 904 }
 905
 906 void ast_rtp_instance_change_source(struct ast_rtp_instance *instance)
 907 {
 908         if (instance->engine->change_source) {
 909                 instance->engine->change_source(instance);
 910         }
 911 }
 912
 913 int ast_rtp_instance_set_qos(struct ast_rtp_instance *instance, int tos, int cos, const char *desc)
 914 {
 915         return instance->engine->qos ? instance->engine->qos(instance, tos, cos, desc) : -1;
 916 }
 917
 918 void ast_rtp_instance_stop(struct ast_rtp_instance *instance)
 919 {
 920         if (instance->engine->stop) {
 921                 instance->engine->stop(instance);
 922         }
 923 }
 924
 925 int ast_rtp_instance_fd(struct ast_rtp_instance *instance, int rtcp)
 926 {
 927         return instance->engine->fd ? instance->engine->fd(instance, rtcp) : -1;
 928 }
 929
 930 struct ast_rtp_glue *ast_rtp_instance_get_glue(const char *type)
 931 {
 932         struct ast_rtp_glue *glue = NULL;
 933
 934         AST_RWLIST_RDLOCK(&glues);
 935
 936         AST_RWLIST_TRAVERSE(&glues, glue, entry) {
 937                 if (!strcasecmp(glue->type, type)) {
 938                         break;
 939                 }
 940         }
 941
 942         AST_RWLIST_UNLOCK(&glues);
 943
 944         return glue;
 945 }
 946
 947 static enum ast_bridge_result local_bridge_loop(struct ast_channel *c0, struct ast_channel *c1, struct ast_rtp_instance *instance0, struct ast_rtp_instance *instance1, int timeoutms, int flags, struct ast_frame **fo, struct ast_channel **rc, void *pvt0, void *pvt1)
 948 {
 949         enum ast_bridge_result res = AST_BRIDGE_FAILED;
 950         struct ast_channel *who = NULL, *other = NULL, *cs[3] = { NULL, };
 951         struct ast_frame *fr = NULL;
 952         struct timeval start;
 953
 954         /* Start locally bridging both instances */
 955         if (instance0->engine->local_bridge && instance0->engine->local_bridge(instance0, instance1)) {
 956                 ast_debug(1, "Failed to locally bridge %s to %s, backing out.\n", ast_channel_name(c0), ast_channel_name(c1));
 957                 ast_channel_unlock(c0);
 958                 ast_channel_unlock(c1);
 959                 return AST_BRIDGE_FAILED_NOWARN;
 960         }
 961         if (instance1->engine->local_bridge && instance1->engine->local_bridge(instance1, instance0)) {
 962                 ast_debug(1, "Failed to locally bridge %s to %s, backing out.\n", ast_channel_name(c1), ast_channel_name(c0));
 963                 if (instance0->engine->local_bridge) {
 964                         instance0->engine->local_bridge(instance0, NULL);
 965                 }
 966                 ast_channel_unlock(c0);
 967                 ast_channel_unlock(c1);
 968                 return AST_BRIDGE_FAILED_NOWARN;
 969         }
 970
 971         ast_channel_unlock(c0);
 972         ast_channel_unlock(c1);
 973
 974         instance0->bridged = instance1;
 975         instance1->bridged = instance0;
 976
 977         ast_poll_channel_add(c0, c1);
 978
 979         /* Hop into a loop waiting for a frame from either channel */
 980         cs[0] = c0;
 981         cs[1] = c1;
 982         cs[2] = NULL;
 983         start = ast_tvnow();
 984         for (;;) {
 985                 int ms;
 986                 /* If the underlying formats have changed force this bridge to break */
 987                 if ((ast_format_cmp(ast_channel_rawreadformat(c0), ast_channel_rawwriteformat(c1)) == AST_FORMAT_CMP_NOT_EQUAL) ||
 988                         (ast_format_cmp(ast_channel_rawreadformat(c1), ast_channel_rawwriteformat(c0)) == AST_FORMAT_CMP_NOT_EQUAL)) {
 989                         ast_debug(1, "rtp-engine-local-bridge: Oooh, formats changed, backing out\n");
 990                         res = AST_BRIDGE_FAILED_NOWARN;
 991                         break;
 992                 }
 993                 /* Check if anything changed */
 994                 if ((ast_channel_tech_pvt(c0) != pvt0) ||
 995                     (ast_channel_tech_pvt(c1) != pvt1) ||
 996                     (ast_channel_masq(c0) || ast_channel_masqr(c0) || ast_channel_masq(c1) || ast_channel_masqr(c1)) ||
 997                     (ast_channel_monitor(c0) || ast_channel_audiohooks(c0) || ast_channel_monitor(c1) || ast_channel_audiohooks(c1)) ||
 998                     (!ast_framehook_list_is_empty(ast_channel_framehooks(c0)) || !ast_framehook_list_is_empty(ast_channel_framehooks(c1)))) {
 999                         ast_debug(1, "rtp-engine-local-bridge: Oooh, something is weird, backing out\n");
1000                         /* If a masquerade needs to happen we have to try to read in a frame so that it actually happens. Without this we risk being called again and going into a loop */
1001                         if ((ast_channel_masq(c0) || ast_channel_masqr(c0)) && (fr = ast_read(c0))) {
1002                                 ast_frfree(fr);
1003                         }
1004                         if ((ast_channel_masq(c1) || ast_channel_masqr(c1)) && (fr = ast_read(c1))) {
1005                                 ast_frfree(fr);
1006                         }
1007                         res = AST_BRIDGE_RETRY;
1008                         break;
1009                 }
1010                 /* Wait on a channel to feed us a frame */
1011                 ms = ast_remaining_ms(start, timeoutms);
1012                 if (!(who = ast_waitfor_n(cs, 2, &ms))) {
1013                         if (!ms) {
1014                                 res = AST_BRIDGE_RETRY;
1015                                 break;
1016                         }
1017                         ast_debug(2, "rtp-engine-local-bridge: Ooh, empty read...\n");
1018                         if (ast_check_hangup(c0) || ast_check_hangup(c1)) {
1019                                 break;
1020                         }
1021                         continue;
1022                 }
1023                 /* Read in frame from channel */
1024                 fr = ast_read(who);
1025                 other = (who == c0) ? c1 : c0;
1026                 /* Depending on the frame we may need to break out of our bridge */
1027                 if (!fr || ((fr->frametype == AST_FRAME_DTMF_BEGIN || fr->frametype == AST_FRAME_DTMF_END) &&
1028                             ((who == c0) && (flags & AST_BRIDGE_DTMF_CHANNEL_0)) |
1029                             ((who == c1) && (flags & AST_BRIDGE_DTMF_CHANNEL_1)))) {
1030                         /* Record received frame and who */
1031                         *fo = fr;
1032                         *rc = who;
1033                         ast_debug(1, "rtp-engine-local-bridge: Ooh, got a %s\n", fr ? "digit" : "hangup");
1034                         res = AST_BRIDGE_COMPLETE;
1035                         break;
1036                 } else if ((fr->frametype == AST_FRAME_CONTROL) && !(flags & AST_BRIDGE_IGNORE_SIGS)) {
1037                         if ((fr->subclass.integer == AST_CONTROL_HOLD) ||
1038                             (fr->subclass.integer == AST_CONTROL_UNHOLD) ||
1039                             (fr->subclass.integer == AST_CONTROL_VIDUPDATE) ||
1040                             (fr->subclass.integer == AST_CONTROL_SRCUPDATE) ||
1041                             (fr->subclass.integer == AST_CONTROL_T38_PARAMETERS) ||
1042                             (fr->subclass.integer == AST_CONTROL_UPDATE_RTP_PEER)) {
1043                                 /* If we are going on hold, then break callback mode and P2P bridging */
1044                                 if (fr->subclass.integer == AST_CONTROL_HOLD) {
1045                                         if (instance0->engine->local_bridge) {
1046                                                 instance0->engine->local_bridge(instance0, NULL);
1047                                         }
1048                                         if (instance1->engine->local_bridge) {
1049                                                 instance1->engine->local_bridge(instance1, NULL);
1050                                         }
1051                                         instance0->bridged = NULL;
1052                                         instance1->bridged = NULL;
1053                                 } else if (fr->subclass.integer == AST_CONTROL_UNHOLD) {
1054                                         if (instance0->engine->local_bridge) {
1055                                                 instance0->engine->local_bridge(instance0, instance1);
1056                                         }
1057                                         if (instance1->engine->local_bridge) {
1058                                                 instance1->engine->local_bridge(instance1, instance0);
1059                                         }
1060                                         instance0->bridged = instance1;
1061                                         instance1->bridged = instance0;
1062                                 }
1063                                 /* Since UPDATE_BRIDGE_PEER is only used by the bridging code, don't forward it */
1064                                 if (fr->subclass.integer != AST_CONTROL_UPDATE_RTP_PEER) {
1065                                         ast_indicate_data(other, fr->subclass.integer, fr->data.ptr, fr->datalen);
1066                                 }
1067                                 ast_frfree(fr);
1068                         } else if (fr->subclass.integer == AST_CONTROL_CONNECTED_LINE) {
1069                                 if (ast_channel_connected_line_sub(who, other, fr, 1) &&
1070                                         ast_channel_connected_line_macro(who, other, fr, other == c0, 1)) {
1071                                         ast_indicate_data(other, fr->subclass.integer, fr->data.ptr, fr->datalen);
1072                                 }
1073                                 ast_frfree(fr);
1074                         } else if (fr->subclass.integer == AST_CONTROL_REDIRECTING) {
1075                                 if (ast_channel_redirecting_sub(who, other, fr, 1) &&
1076                                         ast_channel_redirecting_macro(who, other, fr, other == c0, 1)) {
1077                                         ast_indicate_data(other, fr->subclass.integer, fr->data.ptr, fr->datalen);
1078                                 }
1079                                 ast_frfree(fr);
1080                         } else if (fr->subclass.integer == AST_CONTROL_PVT_CAUSE_CODE) {
1081                                 ast_channel_hangupcause_hash_set(other, fr->data.ptr, fr->datalen);
1082                                 ast_frfree(fr);
1083                         } else {
1084                                 *fo = fr;
1085                                 *rc = who;
1086                                 ast_debug(1, "rtp-engine-local-bridge: Got a FRAME_CONTROL (%d) frame on channel %s\n", fr->subclass.integer, ast_channel_name(who));
1087                                 res = AST_BRIDGE_COMPLETE;
1088                                 break;
1089                         }
1090                 } else {
1091                         if ((fr->frametype == AST_FRAME_DTMF_BEGIN) ||
1092                             (fr->frametype == AST_FRAME_DTMF_END) ||
1093                             (fr->frametype == AST_FRAME_VOICE) ||
1094                             (fr->frametype == AST_FRAME_VIDEO) ||
1095                             (fr->frametype == AST_FRAME_IMAGE) ||
1096                             (fr->frametype == AST_FRAME_HTML) ||
1097                             (fr->frametype == AST_FRAME_MODEM) ||
1098                             (fr->frametype == AST_FRAME_TEXT)) {
1099                                 ast_write(other, fr);
1100                         }
1101
1102                         ast_frfree(fr);
1103                 }
1104                 /* Swap priority */
1105                 cs[2] = cs[0];
1106                 cs[0] = cs[1];
1107                 cs[1] = cs[2];
1108         }
1109
1110         /* Stop locally bridging both instances */
1111         if (instance0->engine->local_bridge) {
1112                 instance0->engine->local_bridge(instance0, NULL);
1113         }
1114         if (instance1->engine->local_bridge) {
1115                 instance1->engine->local_bridge(instance1, NULL);
1116         }
1117
1118         instance0->bridged = NULL;
1119         instance1->bridged = NULL;
1120
1121         ast_poll_channel_del(c0, c1);
1122
1123         return res;
1124 }
1125
1126 static enum ast_bridge_result remote_bridge_loop(struct ast_channel *c0,
1127         struct ast_channel *c1,
1128         struct ast_rtp_instance *instance0,
1129         struct ast_rtp_instance *instance1,
1130         struct ast_rtp_instance *vinstance0,
1131         struct ast_rtp_instance *vinstance1,
1132         struct ast_rtp_instance *tinstance0,
1133         struct ast_rtp_instance *tinstance1,
1134         struct ast_rtp_glue *glue0,
1135         struct ast_rtp_glue *glue1,
1136         struct ast_format_cap *cap0,
1137         struct ast_format_cap *cap1,
1138         int timeoutms,
1139         int flags,
1140         struct ast_frame **fo,
1141         struct ast_channel **rc,
1142         void *pvt0,
1143         void *pvt1)
1144 {
1145         enum ast_bridge_result res = AST_BRIDGE_FAILED;
1146         struct ast_channel *who = NULL, *other = NULL, *cs[3] = { NULL, };
1147         struct ast_format_cap *oldcap0 = ast_format_cap_dup(cap0);
1148         struct ast_format_cap *oldcap1 = ast_format_cap_dup(cap1);
1149         struct ast_sockaddr ac1 = {{0,}}, vac1 = {{0,}}, tac1 = {{0,}}, ac0 = {{0,}}, vac0 = {{0,}}, tac0 = {{0,}};
1150         struct ast_sockaddr t1 = {{0,}}, vt1 = {{0,}}, tt1 = {{0,}}, t0 = {{0,}}, vt0 = {{0,}}, tt0 = {{0,}};
1151         struct ast_frame *fr = NULL;
1152         struct timeval start;
1153
1154         if (!oldcap0 || !oldcap1) {
1155                 ast_channel_unlock(c0);
1156                 ast_channel_unlock(c1);
1157                 goto remote_bridge_cleanup;
1158         }
1159         /* Test the first channel */
1160         if (!(glue0->update_peer(c0, instance1, vinstance1, tinstance1, cap1, 0))) {
1161                 ast_rtp_instance_get_remote_address(instance1, &ac1);
1162                 if (vinstance1) {
1163                         ast_rtp_instance_get_remote_address(vinstance1, &vac1);
1164                 }
1165                 if (tinstance1) {
1166                         ast_rtp_instance_get_remote_address(tinstance1, &tac1);
1167                 }
1168         } else {
1169                 ast_log(LOG_WARNING, "Channel '%s' failed to talk to '%s'\n", ast_channel_name(c0), ast_channel_name(c1));
1170         }
1171
1172         /* Test the second channel */
1173         if (!(glue1->update_peer(c1, instance0, vinstance0, tinstance0, cap0, 0))) {
1174                 ast_rtp_instance_get_remote_address(instance0, &ac0);
1175                 if (vinstance0) {
1176                         ast_rtp_instance_get_remote_address(instance0, &vac0);
1177                 }
1178                 if (tinstance0) {
1179                         ast_rtp_instance_get_remote_address(instance0, &tac0);
1180                 }
1181         } else {
1182                 ast_log(LOG_WARNING, "Channel '%s' failed to talk to '%s'\n", ast_channel_name(c1), ast_channel_name(c0));
1183         }
1184
1185         ast_channel_unlock(c0);
1186         ast_channel_unlock(c1);
1187
1188         instance0->bridged = instance1;
1189         instance1->bridged = instance0;
1190
1191         ast_poll_channel_add(c0, c1);
1192
1193         /* Go into a loop handling any stray frames that may come in */
1194         cs[0] = c0;
1195         cs[1] = c1;
1196         cs[2] = NULL;
1197         start = ast_tvnow();
1198         for (;;) {
1199                 int ms;
1200                 /* Check if anything changed */
1201                 if ((ast_channel_tech_pvt(c0) != pvt0) ||
1202                     (ast_channel_tech_pvt(c1) != pvt1) ||
1203                     (ast_channel_masq(c0) || ast_channel_masqr(c0) || ast_channel_masq(c1) || ast_channel_masqr(c1)) ||
1204                     (ast_channel_monitor(c0) || ast_channel_audiohooks(c0) || ast_channel_monitor(c1) || ast_channel_audiohooks(c1)) ||
1205                     (!ast_framehook_list_is_empty(ast_channel_framehooks(c0)) || !ast_framehook_list_is_empty(ast_channel_framehooks(c1)))) {
1206                         ast_debug(1, "Oooh, something is weird, backing out\n");
1207                         res = AST_BRIDGE_RETRY;
1208                         break;
1209                 }
1210
1211                 /* Check if they have changed their address */
1212                 ast_rtp_instance_get_remote_address(instance1, &t1);
1213                 if (vinstance1) {
1214                         ast_rtp_instance_get_remote_address(vinstance1, &vt1);
1215                 }
1216                 if (tinstance1) {
1217                         ast_rtp_instance_get_remote_address(tinstance1, &tt1);
1218                 }
1219                 if (glue1->get_codec) {
1220                         ast_format_cap_remove_all(cap1);
1221                         glue1->get_codec(c1, cap1);
1222                 }
1223
1224                 ast_rtp_instance_get_remote_address(instance0, &t0);
1225                 if (vinstance0) {
1226                         ast_rtp_instance_get_remote_address(vinstance0, &vt0);
1227                 }
1228                 if (tinstance0) {
1229                         ast_rtp_instance_get_remote_address(tinstance0, &tt0);
1230                 }
1231                 if (glue0->get_codec) {
1232                         ast_format_cap_remove_all(cap0);
1233                         glue0->get_codec(c0, cap0);
1234                 }
1235
1236                 if ((ast_sockaddr_cmp(&t1, &ac1)) ||
1237                     (vinstance1 && ast_sockaddr_cmp(&vt1, &vac1)) ||
1238                     (tinstance1 && ast_sockaddr_cmp(&tt1, &tac1)) ||
1239                     (!ast_format_cap_identical(cap1, oldcap1))) {
1240                         char tmp_buf[512] = { 0, };
1241                         ast_debug(1, "Oooh, '%s' changed end address to %s (format %s)\n",
1242                                   ast_channel_name(c1), ast_sockaddr_stringify(&t1),
1243                                   ast_getformatname_multiple(tmp_buf, sizeof(tmp_buf), cap1));
1244                         ast_debug(1, "Oooh, '%s' changed end vaddress to %s (format %s)\n",
1245                                   ast_channel_name(c1), ast_sockaddr_stringify(&vt1),
1246                                   ast_getformatname_multiple(tmp_buf, sizeof(tmp_buf), cap1));
1247                         ast_debug(1, "Oooh, '%s' changed end taddress to %s (format %s)\n",
1248                                   ast_channel_name(c1), ast_sockaddr_stringify(&tt1),
1249                                   ast_getformatname_multiple(tmp_buf, sizeof(tmp_buf), cap1));
1250                         ast_debug(1, "Oooh, '%s' was %s/(format %s)\n",
1251                                   ast_channel_name(c1), ast_sockaddr_stringify(&ac1),
1252                                   ast_getformatname_multiple(tmp_buf, sizeof(tmp_buf), oldcap1));
1253                         ast_debug(1, "Oooh, '%s' was %s/(format %s)\n",
1254                                   ast_channel_name(c1), ast_sockaddr_stringify(&vac1),
1255                                   ast_getformatname_multiple(tmp_buf, sizeof(tmp_buf), oldcap1));
1256                         ast_debug(1, "Oooh, '%s' was %s/(format %s)\n",
1257                                   ast_channel_name(c1), ast_sockaddr_stringify(&tac1),
1258                                   ast_getformatname_multiple(tmp_buf, sizeof(tmp_buf), oldcap1));
1259                         if (glue0->update_peer(c0,
1260                                                ast_sockaddr_isnull(&t1)  ? NULL : instance1,
1261                                                ast_sockaddr_isnull(&vt1) ? NULL : vinstance1,
1262                                                ast_sockaddr_isnull(&tt1) ? NULL : tinstance1,
1263                                                cap1, 0)) {
1264                                 ast_log(LOG_WARNING, "Channel '%s' failed to update to '%s'\n", ast_channel_name(c0), ast_channel_name(c1));
1265                         }
1266                         ast_sockaddr_copy(&ac1, &t1);
1267                         ast_sockaddr_copy(&vac1, &vt1);
1268                         ast_sockaddr_copy(&tac1, &tt1);
1269                         ast_format_cap_copy(oldcap1, cap1);
1270                 }
1271                 if ((ast_sockaddr_cmp(&t0, &ac0)) ||
1272                     (vinstance0 && ast_sockaddr_cmp(&vt0, &vac0)) ||
1273                     (tinstance0 && ast_sockaddr_cmp(&tt0, &tac0)) ||
1274                     (!ast_format_cap_identical(cap0, oldcap0))) {
1275                         char tmp_buf[512] = { 0, };
1276                         ast_debug(1, "Oooh, '%s' changed end address to %s (format %s)\n",
1277                                   ast_channel_name(c0), ast_sockaddr_stringify(&t0),
1278                                   ast_getformatname_multiple(tmp_buf, sizeof(tmp_buf), cap0));
1279                         ast_debug(1, "Oooh, '%s' was %s/(format %s)\n",
1280                                   ast_channel_name(c0), ast_sockaddr_stringify(&ac0),
1281                                   ast_getformatname_multiple(tmp_buf, sizeof(tmp_buf), oldcap0));
1282                         if (glue1->update_peer(c1, t0.len ? instance0 : NULL,
1283                                                 vt0.len ? vinstance0 : NULL,
1284                                                 tt0.len ? tinstance0 : NULL,
1285                                                 cap0, 0)) {
1286                                 ast_log(LOG_WARNING, "Channel '%s' failed to update to '%s'\n", ast_channel_name(c1), ast_channel_name(c0));
1287                         }
1288                         ast_sockaddr_copy(&ac0, &t0);
1289                         ast_sockaddr_copy(&vac0, &vt0);
1290                         ast_sockaddr_copy(&tac0, &tt0);
1291                         ast_format_cap_copy(oldcap0, cap0);
1292                 }
1293
1294                 ms = ast_remaining_ms(start, timeoutms);
1295                 /* Wait for frame to come in on the channels */
1296                 if (!(who = ast_waitfor_n(cs, 2, &ms))) {
1297                         if (!ms) {
1298                                 res = AST_BRIDGE_RETRY;
1299                                 break;
1300                         }
1301                         ast_debug(1, "Ooh, empty read...\n");
1302                         if (ast_check_hangup(c0) || ast_check_hangup(c1)) {
1303                                 break;
1304                         }
1305                         continue;
1306                 }
1307                 fr = ast_read(who);
1308                 other = (who == c0) ? c1 : c0;
1309                 if (!fr || ((fr->frametype == AST_FRAME_DTMF_BEGIN || fr->frametype == AST_FRAME_DTMF_END) &&
1310                             (((who == c0) && (flags & AST_BRIDGE_DTMF_CHANNEL_0)) ||
1311                              ((who == c1) && (flags & AST_BRIDGE_DTMF_CHANNEL_1))))) {
1312                         /* Break out of bridge */
1313                         *fo = fr;
1314                         *rc = who;
1315                         ast_debug(1, "Oooh, got a %s\n", fr ? "digit" : "hangup");
1316                         res = AST_BRIDGE_COMPLETE;
1317                         break;
1318                 } else if ((fr->frametype == AST_FRAME_CONTROL) && !(flags & AST_BRIDGE_IGNORE_SIGS)) {
1319                         if ((fr->subclass.integer == AST_CONTROL_HOLD) ||
1320                             (fr->subclass.integer == AST_CONTROL_UNHOLD) ||
1321                             (fr->subclass.integer == AST_CONTROL_VIDUPDATE) ||
1322                             (fr->subclass.integer == AST_CONTROL_SRCUPDATE) ||
1323                             (fr->subclass.integer == AST_CONTROL_T38_PARAMETERS) ||
1324                                 (fr->subclass.integer == AST_CONTROL_UPDATE_RTP_PEER)) {
1325                                 if (fr->subclass.integer == AST_CONTROL_HOLD) {
1326                                         /* If we someone went on hold we want the other side to reinvite back to us */
1327                                         if (who == c0) {
1328                                                 glue1->update_peer(c1, NULL, NULL, NULL, 0, 0);
1329                                         } else {
1330                                                 glue0->update_peer(c0, NULL, NULL, NULL, 0, 0);
1331                                         }
1332                                 } else if (fr->subclass.integer == AST_CONTROL_UNHOLD ||
1333                                         fr->subclass.integer == AST_CONTROL_UPDATE_RTP_PEER) {
1334                                         /* If they went off hold they should go back to being direct, or if we have
1335                                          * been told to force a peer update, go ahead and do it. */
1336                                         if (who == c0) {
1337                                                 glue1->update_peer(c1, instance0, vinstance0, tinstance0, cap0, 0);
1338                                         } else {
1339                                                 glue0->update_peer(c0, instance1, vinstance1, tinstance1, cap1, 0);
1340                                         }
1341                                 }
1342                                 /* Update local address information */
1343                                 ast_rtp_instance_get_remote_address(instance0, &t0);
1344                                 ast_sockaddr_copy(&ac0, &t0);
1345                                 ast_rtp_instance_get_remote_address(instance1, &t1);
1346                                 ast_sockaddr_copy(&ac1, &t1);
1347                                 /* Update codec information */
1348                                 if (glue0->get_codec && ast_channel_tech_pvt(c0)) {
1349                                         ast_format_cap_remove_all(cap0);
1350                                         ast_format_cap_remove_all(oldcap0);
1351                                         glue0->get_codec(c0, cap0);
1352                                         ast_format_cap_append(oldcap0, cap0);
1353
1354                                 }
1355                                 if (glue1->get_codec && ast_channel_tech_pvt(c1)) {
1356                                         ast_format_cap_remove_all(cap1);
1357                                         ast_format_cap_remove_all(oldcap1);
1358                                         glue1->get_codec(c1, cap1);
1359                                         ast_format_cap_append(oldcap1, cap1);
1360                                 }
1361                                 /* Since UPDATE_BRIDGE_PEER is only used by the bridging code, don't forward it */
1362                                 if (fr->subclass.integer != AST_CONTROL_UPDATE_RTP_PEER) {
1363                                         ast_indicate_data(other, fr->subclass.integer, fr->data.ptr, fr->datalen);
1364                                 }
1365                                 ast_frfree(fr);
1366                         } else if (fr->subclass.integer == AST_CONTROL_CONNECTED_LINE) {
1367                                 if (ast_channel_connected_line_sub(who, other, fr, 1) &&
1368                                         ast_channel_connected_line_macro(who, other, fr, other == c0, 1)) {
1369                                         ast_indicate_data(other, fr->subclass.integer, fr->data.ptr, fr->datalen);
1370                                 }
1371                                 ast_frfree(fr);
1372                         } else if (fr->subclass.integer == AST_CONTROL_REDIRECTING) {
1373                                 if (ast_channel_redirecting_sub(who, other, fr, 1) &&
1374                                         ast_channel_redirecting_macro(who, other, fr, other == c0, 1)) {
1375                                         ast_indicate_data(other, fr->subclass.integer, fr->data.ptr, fr->datalen);
1376                                 }
1377                                 ast_frfree(fr);
1378                         } else if (fr->subclass.integer == AST_CONTROL_PVT_CAUSE_CODE) {
1379                                 ast_channel_hangupcause_hash_set(other, fr->data.ptr, fr->datalen);
1380                                 ast_frfree(fr);
1381                         } else {
1382                                 *fo = fr;
1383                                 *rc = who;
1384                                 ast_debug(1, "Got a FRAME_CONTROL (%d) frame on channel %s\n", fr->subclass.integer, ast_channel_name(who));
1385                                 res = AST_BRIDGE_COMPLETE;
1386                                 goto remote_bridge_cleanup;
1387                         }
1388                 } else {
1389                         if ((fr->frametype == AST_FRAME_DTMF_BEGIN) ||
1390                             (fr->frametype == AST_FRAME_DTMF_END) ||
1391                             (fr->frametype == AST_FRAME_VOICE) ||
1392                             (fr->frametype == AST_FRAME_VIDEO) ||
1393                             (fr->frametype == AST_FRAME_IMAGE) ||
1394                             (fr->frametype == AST_FRAME_HTML) ||
1395                             (fr->frametype == AST_FRAME_MODEM) ||
1396                             (fr->frametype == AST_FRAME_TEXT)) {
1397                                 ast_write(other, fr);
1398                         }
1399                         ast_frfree(fr);
1400                 }
1401                 /* Swap priority */
1402                 cs[2] = cs[0];
1403                 cs[0] = cs[1];
1404                 cs[1] = cs[2];
1405         }
1406
1407         if (ast_test_flag(ast_channel_flags(c0), AST_FLAG_ZOMBIE)) {
1408                 ast_debug(1, "Channel '%s' Zombie cleardown from bridge\n", ast_channel_name(c0));
1409         } else if (ast_channel_tech_pvt(c0) != pvt0) {
1410                 ast_debug(1, "Channel c0->'%s' pvt changed, in bridge with c1->'%s'\n", ast_channel_name(c0), ast_channel_name(c1));
1411         } else if (glue0 != ast_rtp_instance_get_glue(ast_channel_tech(c0)->type)) {
1412                 ast_debug(1, "Channel c0->'%s' technology changed, in bridge with c1->'%s'\n", ast_channel_name(c0), ast_channel_name(c1));
1413         } else if (glue0->update_peer(c0, NULL, NULL, NULL, 0, 0)) {
1414                 ast_log(LOG_WARNING, "Channel '%s' failed to break RTP bridge\n", ast_channel_name(c0));
1415         }
1416         if (ast_test_flag(ast_channel_flags(c1), AST_FLAG_ZOMBIE)) {
1417                 ast_debug(1, "Channel '%s' Zombie cleardown from bridge\n", ast_channel_name(c1));
1418         } else if (ast_channel_tech_pvt(c1) != pvt1) {
1419                 ast_debug(1, "Channel c1->'%s' pvt changed, in bridge with c0->'%s'\n", ast_channel_name(c1), ast_channel_name(c0));
1420         } else if (glue1 != ast_rtp_instance_get_glue(ast_channel_tech(c1)->type)) {
1421                 ast_debug(1, "Channel c1->'%s' technology changed, in bridge with c0->'%s'\n", ast_channel_name(c1), ast_channel_name(c0));
1422         } else if (glue1->update_peer(c1, NULL, NULL, NULL, 0, 0)) {
1423                 ast_log(LOG_WARNING, "Channel '%s' failed to break RTP bridge\n", ast_channel_name(c1));
1424         }
1425
1426         instance0->bridged = NULL;
1427         instance1->bridged = NULL;
1428
1429         ast_poll_channel_del(c0, c1);
1430
1431 remote_bridge_cleanup:
1432         ast_format_cap_destroy(oldcap0);
1433         ast_format_cap_destroy(oldcap1);
1434
1435         return res;
1436 }
1437
1438 /*!
1439  * \brief Conditionally unref an rtp instance
1440  */
1441 static void unref_instance_cond(struct ast_rtp_instance **instance)
1442 {
1443         if (*instance) {
1444                 ao2_ref(*instance, -1);
1445                 *instance = NULL;
1446         }
1447 }
1448
1449 enum ast_bridge_result ast_rtp_instance_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc, int timeoutms)
1450 {
1451         struct ast_rtp_instance *instance0 = NULL, *instance1 = NULL,
1452                         *vinstance0 = NULL, *vinstance1 = NULL,
1453                         *tinstance0 = NULL, *tinstance1 = NULL;
1454         struct ast_rtp_glue *glue0, *glue1;
1455         struct ast_sockaddr addr1 = { {0, }, }, addr2 = { {0, }, };
1456         enum ast_rtp_glue_result audio_glue0_res = AST_RTP_GLUE_RESULT_FORBID, video_glue0_res = AST_RTP_GLUE_RESULT_FORBID;
1457         enum ast_rtp_glue_result audio_glue1_res = AST_RTP_GLUE_RESULT_FORBID, video_glue1_res = AST_RTP_GLUE_RESULT_FORBID;
1458         enum ast_bridge_result res = AST_BRIDGE_FAILED;
1459         enum ast_rtp_dtmf_mode dmode;
1460         struct ast_format_cap *cap0 = ast_format_cap_alloc_nolock();
1461         struct ast_format_cap *cap1 = ast_format_cap_alloc_nolock();
1462         int unlock_chans = 1;
1463
1464         if (!cap0 || !cap1) {
1465                 unlock_chans = 0;
1466                 goto done;
1467         }
1468
1469         /* Lock both channels so we can look for the glue that binds them together */
1470         ast_channel_lock_both(c0, c1);
1471
1472         /* Ensure neither channel got hungup during lock avoidance */
1473         if (ast_check_hangup(c0) || ast_check_hangup(c1)) {
1474                 ast_log(LOG_WARNING, "Got hangup while attempting to bridge '%s' and '%s'\n", ast_channel_name(c0), ast_channel_name(c1));
1475                 goto done;
1476         }
1477
1478         /* Grab glue that binds each channel to something using the RTP engine */
1479         if (!(glue0 = ast_rtp_instance_get_glue(ast_channel_tech(c0)->type)) || !(glue1 = ast_rtp_instance_get_glue(ast_channel_tech(c1)->type))) {
1480                 ast_debug(1, "Can't find native functions for channel '%s'\n", glue0 ? ast_channel_name(c1) : ast_channel_name(c0));
1481                 goto done;
1482         }
1483
1484         audio_glue0_res = glue0->get_rtp_info(c0, &instance0);
1485         video_glue0_res = glue0->get_vrtp_info ? glue0->get_vrtp_info(c0, &vinstance0) : AST_RTP_GLUE_RESULT_FORBID;
1486
1487         audio_glue1_res = glue1->get_rtp_info(c1, &instance1);
1488         video_glue1_res = glue1->get_vrtp_info ? glue1->get_vrtp_info(c1, &vinstance1) : AST_RTP_GLUE_RESULT_FORBID;
1489
1490         /* Apply any limitations on direct media bridging that may be present */
1491         if (audio_glue0_res == audio_glue1_res && audio_glue1_res == AST_RTP_GLUE_RESULT_REMOTE) {
1492                 if (glue0->allow_rtp_remote && !(glue0->allow_rtp_remote(c0, instance1))) {
1493                         /* If the allow_rtp_remote indicates that remote isn't allowed, revert to local bridge */
1494                         audio_glue0_res = audio_glue1_res = AST_RTP_GLUE_RESULT_LOCAL;
1495                 } else if (glue1->allow_rtp_remote && !(glue1->allow_rtp_remote(c1, instance0))) {
1496                         audio_glue0_res = audio_glue1_res = AST_RTP_GLUE_RESULT_LOCAL;
1497                 }
1498         }
1499         if (video_glue0_res == video_glue1_res && video_glue1_res == AST_RTP_GLUE_RESULT_REMOTE) {
1500                 if (glue0->allow_vrtp_remote && !(glue0->allow_vrtp_remote(c0, instance1))) {
1501                         /* if the allow_vrtp_remote indicates that remote isn't allowed, revert to local bridge */
1502                         video_glue0_res = video_glue1_res = AST_RTP_GLUE_RESULT_LOCAL;
1503                 } else if (glue1->allow_vrtp_remote && !(glue1->allow_vrtp_remote(c1, instance0))) {
1504                         video_glue0_res = video_glue1_res = AST_RTP_GLUE_RESULT_LOCAL;
1505                 }
1506         }
1507
1508         /* If we are carrying video, and both sides are not going to remotely bridge... fail the native bridge */
1509         if (video_glue0_res != AST_RTP_GLUE_RESULT_FORBID && (audio_glue0_res != AST_RTP_GLUE_RESULT_REMOTE || video_glue0_res != AST_RTP_GLUE_RESULT_REMOTE)) {
1510                 audio_glue0_res = AST_RTP_GLUE_RESULT_FORBID;
1511         }
1512         if (video_glue1_res != AST_RTP_GLUE_RESULT_FORBID && (audio_glue1_res != AST_RTP_GLUE_RESULT_REMOTE || video_glue1_res != AST_RTP_GLUE_RESULT_REMOTE)) {
1513                 audio_glue1_res = AST_RTP_GLUE_RESULT_FORBID;
1514         }
1515
1516         /* If any sort of bridge is forbidden just completely bail out and go back to generic bridging */
1517         if (audio_glue0_res == AST_RTP_GLUE_RESULT_FORBID || audio_glue1_res == AST_RTP_GLUE_RESULT_FORBID) {
1518                 res = AST_BRIDGE_FAILED_NOWARN;
1519                 goto done;
1520         }
1521
1522
1523         /* If address families differ, force a local bridge */
1524         ast_rtp_instance_get_remote_address(instance0, &addr1);
1525         ast_rtp_instance_get_remote_address(instance1, &addr2);
1526
1527         if (addr1.ss.ss_family != addr2.ss.ss_family ||
1528            (ast_sockaddr_is_ipv4_mapped(&addr1) != ast_sockaddr_is_ipv4_mapped(&addr2))) {
1529                 audio_glue0_res = AST_RTP_GLUE_RESULT_LOCAL;
1530                 audio_glue1_res = AST_RTP_GLUE_RESULT_LOCAL;
1531         }
1532
1533         /* If we need to get DTMF see if we can do it outside of the RTP stream itself */
1534         dmode = ast_rtp_instance_dtmf_mode_get(instance0);
1535         if ((flags & AST_BRIDGE_DTMF_CHANNEL_0) && dmode) {
1536                 res = AST_BRIDGE_FAILED_NOWARN;
1537                 goto done;
1538         }
1539         dmode = ast_rtp_instance_dtmf_mode_get(instance1);
1540         if ((flags & AST_BRIDGE_DTMF_CHANNEL_1) && dmode) {
1541                 res = AST_BRIDGE_FAILED_NOWARN;
1542                 goto done;
1543         }
1544
1545         /* If we have gotten to a local bridge make sure that both sides have the same local bridge callback and that they are DTMF compatible */
1546         if ((audio_glue0_res == AST_RTP_GLUE_RESULT_LOCAL || audio_glue1_res == AST_RTP_GLUE_RESULT_LOCAL)
1547                 && (instance0->engine->local_bridge != instance1->engine->local_bridge
1548                         || (instance0->engine->dtmf_compatible && !instance0->engine->dtmf_compatible(c0, instance0, c1, instance1)))) {
1549                 res = AST_BRIDGE_FAILED_NOWARN;
1550                 goto done;
1551         }
1552
1553         /* Make sure that codecs match */
1554         if (glue0->get_codec){
1555                 glue0->get_codec(c0, cap0);
1556         }
1557         if (glue1->get_codec) {
1558                 glue1->get_codec(c1, cap1);
1559         }
1560         if (!ast_format_cap_is_empty(cap0) && !ast_format_cap_is_empty(cap1) && !ast_format_cap_has_joint(cap0, cap1)) {
1561                 char tmp0[256] = { 0, };
1562                 char tmp1[256] = { 0, };
1563                 ast_debug(1, "Channel codec0 = %s is not codec1 = %s, cannot native bridge in RTP.\n",
1564                         ast_getformatname_multiple(tmp0, sizeof(tmp0), cap0),
1565                         ast_getformatname_multiple(tmp1, sizeof(tmp1), cap1));
1566                 res = AST_BRIDGE_FAILED_NOWARN;
1567                 goto done;
1568         }
1569
1570         instance0->glue = glue0;
1571         instance1->glue = glue1;
1572         instance0->chan = c0;
1573         instance1->chan = c1;
1574
1575         /* Depending on the end result for bridging either do a local bridge or remote bridge */
1576         if (audio_glue0_res == AST_RTP_GLUE_RESULT_LOCAL || audio_glue1_res == AST_RTP_GLUE_RESULT_LOCAL) {
1577                 ast_verb(3, "Locally bridging %s and %s\n", ast_channel_name(c0), ast_channel_name(c1));
1578                 res = local_bridge_loop(c0, c1, instance0, instance1, timeoutms, flags, fo, rc, ast_channel_tech_pvt(c0), ast_channel_tech_pvt(c1));
1579         } else {
1580                 ast_verb(3, "Remotely bridging %s and %s\n", ast_channel_name(c0), ast_channel_name(c1));
1581                 res = remote_bridge_loop(c0, c1, instance0, instance1, vinstance0, vinstance1,
1582                                 tinstance0, tinstance1, glue0, glue1, cap0, cap1, timeoutms, flags,
1583                                 fo, rc, ast_channel_tech_pvt(c0), ast_channel_tech_pvt(c1));
1584         }
1585
1586         instance0->glue = NULL;
1587         instance1->glue = NULL;
1588         instance0->chan = NULL;
1589         instance1->chan = NULL;
1590
1591         unlock_chans = 0;
1592
1593 done:
1594         if (unlock_chans) {
1595                 ast_channel_unlock(c0);
1596                 ast_channel_unlock(c1);
1597         }
1598         ast_format_cap_destroy(cap1);
1599         ast_format_cap_destroy(cap0);
1600
1601         unref_instance_cond(&instance0);
1602         unref_instance_cond(&instance1);
1603         unref_instance_cond(&vinstance0);
1604         unref_instance_cond(&vinstance1);
1605         unref_instance_cond(&tinstance0);
1606         unref_instance_cond(&tinstance1);
1607
1608         return res;
1609 }
1610
1611 struct ast_rtp_instance *ast_rtp_instance_get_bridged(struct ast_rtp_instance *instance)
1612 {
1613         return instance->bridged;
1614 }
1615
1616 void ast_rtp_instance_early_bridge_make_compatible(struct ast_channel *c0, struct ast_channel *c1)
1617 {
1618         struct ast_rtp_instance *instance0 = NULL, *instance1 = NULL,
1619                 *vinstance0 = NULL, *vinstance1 = NULL,
1620                 *tinstance0 = NULL, *tinstance1 = NULL;
1621         struct ast_rtp_glue *glue0, *glue1;
1622         enum ast_rtp_glue_result audio_glue0_res = AST_RTP_GLUE_RESULT_FORBID, video_glue0_res = AST_RTP_GLUE_RESULT_FORBID;
1623         enum ast_rtp_glue_result audio_glue1_res = AST_RTP_GLUE_RESULT_FORBID, video_glue1_res = AST_RTP_GLUE_RESULT_FORBID;
1624         struct ast_format_cap *cap0 = ast_format_cap_alloc_nolock();
1625         struct ast_format_cap *cap1 = ast_format_cap_alloc_nolock();
1626
1627         /* Lock both channels so we can look for the glue that binds them together */
1628         ast_channel_lock_both(c0, c1);
1629
1630         if (!cap1 || !cap0) {
1631                 goto done;
1632         }
1633
1634         /* Grab glue that binds each channel to something using the RTP engine */
1635         if (!(glue0 = ast_rtp_instance_get_glue(ast_channel_tech(c0)->type)) || !(glue1 = ast_rtp_instance_get_glue(ast_channel_tech(c1)->type))) {
1636                 ast_debug(1, "Can't find native functions for channel '%s'\n", glue0 ? ast_channel_name(c1) : ast_channel_name(c0));
1637                 goto done;
1638         }
1639
1640         audio_glue0_res = glue0->get_rtp_info(c0, &instance0);
1641         video_glue0_res = glue0->get_vrtp_info ? glue0->get_vrtp_info(c0, &vinstance0) : AST_RTP_GLUE_RESULT_FORBID;
1642
1643         audio_glue1_res = glue1->get_rtp_info(c1, &instance1);
1644         video_glue1_res = glue1->get_vrtp_info ? glue1->get_vrtp_info(c1, &vinstance1) : AST_RTP_GLUE_RESULT_FORBID;
1645
1646         /* If we are carrying video, and both sides are not going to remotely bridge... fail the native bridge */
1647         if (video_glue0_res != AST_RTP_GLUE_RESULT_FORBID && (audio_glue0_res != AST_RTP_GLUE_RESULT_REMOTE || video_glue0_res != AST_RTP_GLUE_RESULT_REMOTE)) {
1648                 audio_glue0_res = AST_RTP_GLUE_RESULT_FORBID;
1649         }
1650         if (video_glue1_res != AST_RTP_GLUE_RESULT_FORBID && (audio_glue1_res != AST_RTP_GLUE_RESULT_REMOTE || video_glue1_res != AST_RTP_GLUE_RESULT_REMOTE)) {
1651                 audio_glue1_res = AST_RTP_GLUE_RESULT_FORBID;
1652         }
1653         if (audio_glue0_res == AST_RTP_GLUE_RESULT_REMOTE && (video_glue0_res == AST_RTP_GLUE_RESULT_FORBID || video_glue0_res == AST_RTP_GLUE_RESULT_REMOTE) && glue0->get_codec) {
1654                 glue0->get_codec(c0, cap0);
1655         }
1656         if (audio_glue1_res == AST_RTP_GLUE_RESULT_REMOTE && (video_glue1_res == AST_RTP_GLUE_RESULT_FORBID || video_glue1_res == AST_RTP_GLUE_RESULT_REMOTE) && glue1->get_codec) {
1657                 glue1->get_codec(c1, cap1);
1658         }
1659
1660         /* If any sort of bridge is forbidden just completely bail out and go back to generic bridging */
1661         if (audio_glue0_res != AST_RTP_GLUE_RESULT_REMOTE || audio_glue1_res != AST_RTP_GLUE_RESULT_REMOTE) {
1662                 goto done;
1663         }
1664
1665         /* Make sure we have matching codecs */
1666         if (!ast_format_cap_has_joint(cap0, cap1)) {
1667                 goto done;
1668         }
1669
1670         ast_rtp_codecs_payloads_copy(&instance0->codecs, &instance1->codecs, instance1);
1671
1672         if (vinstance0 && vinstance1) {
1673                 ast_rtp_codecs_payloads_copy(&vinstance0->codecs, &vinstance1->codecs, vinstance1);
1674         }
1675         if (tinstance0 && tinstance1) {
1676                 ast_rtp_codecs_payloads_copy(&tinstance0->codecs, &tinstance1->codecs, tinstance1);
1677         }
1678
1679         if (glue0->update_peer(c0, instance1, vinstance1, tinstance1, cap1, 0)) {
1680                 ast_log(LOG_WARNING, "Channel '%s' failed to setup early bridge to '%s'\n",
1681                         ast_channel_name(c0), ast_channel_name(c1));
1682         } else {
1683                 ast_debug(1, "Seeded SDP of '%s' with that of '%s'\n",
1684                         ast_channel_name(c0), ast_channel_name(c1));
1685         }
1686
1687 done:
1688         ast_channel_unlock(c0);
1689         ast_channel_unlock(c1);
1690
1691         ast_format_cap_destroy(cap0);
1692         ast_format_cap_destroy(cap1);
1693
1694         unref_instance_cond(&instance0);
1695         unref_instance_cond(&instance1);
1696         unref_instance_cond(&vinstance0);
1697         unref_instance_cond(&vinstance1);
1698         unref_instance_cond(&tinstance0);
1699         unref_instance_cond(&tinstance1);
1700 }
1701
1702 int ast_rtp_instance_early_bridge(struct ast_channel *c0, struct ast_channel *c1)
1703 {
1704         struct ast_rtp_instance *instance0 = NULL, *instance1 = NULL,
1705                         *vinstance0 = NULL, *vinstance1 = NULL,
1706                         *tinstance0 = NULL, *tinstance1 = NULL;
1707         struct ast_rtp_glue *glue0, *glue1;
1708         enum ast_rtp_glue_result audio_glue0_res = AST_RTP_GLUE_RESULT_FORBID, video_glue0_res = AST_RTP_GLUE_RESULT_FORBID;
1709         enum ast_rtp_glue_result audio_glue1_res = AST_RTP_GLUE_RESULT_FORBID, video_glue1_res = AST_RTP_GLUE_RESULT_FORBID;
1710         struct ast_format_cap *cap0 = ast_format_cap_alloc_nolock();
1711         struct ast_format_cap *cap1 = ast_format_cap_alloc_nolock();
1712
1713         /* If there is no second channel just immediately bail out, we are of no use in that scenario */
1714         if (!c1 || !cap1 || !cap0) {
1715                 ast_format_cap_destroy(cap0);
1716                 ast_format_cap_destroy(cap1);
1717                 return -1;
1718         }
1719
1720         /* Lock both channels so we can look for the glue that binds them together */
1721         ast_channel_lock_both(c0, c1);
1722
1723         /* Grab glue that binds each channel to something using the RTP engine */
1724         if (!(glue0 = ast_rtp_instance_get_glue(ast_channel_tech(c0)->type)) || !(glue1 = ast_rtp_instance_get_glue(ast_channel_tech(c1)->type))) {
1725                 ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", glue0 ? ast_channel_name(c1) : ast_channel_name(c0));
1726                 goto done;
1727         }
1728
1729         audio_glue0_res = glue0->get_rtp_info(c0, &instance0);
1730         video_glue0_res = glue0->get_vrtp_info ? glue0->get_vrtp_info(c0, &vinstance0) : AST_RTP_GLUE_RESULT_FORBID;
1731
1732         audio_glue1_res = glue1->get_rtp_info(c1, &instance1);
1733         video_glue1_res = glue1->get_vrtp_info ? glue1->get_vrtp_info(c1, &vinstance1) : AST_RTP_GLUE_RESULT_FORBID;
1734
1735         /* If we are carrying video, and both sides are not going to remotely bridge... fail the native bridge */
1736         if (video_glue0_res != AST_RTP_GLUE_RESULT_FORBID && (audio_glue0_res != AST_RTP_GLUE_RESULT_REMOTE || video_glue0_res != AST_RTP_GLUE_RESULT_REMOTE)) {
1737                 audio_glue0_res = AST_RTP_GLUE_RESULT_FORBID;
1738         }
1739         if (video_glue1_res != AST_RTP_GLUE_RESULT_FORBID && (audio_glue1_res != AST_RTP_GLUE_RESULT_REMOTE || video_glue1_res != AST_RTP_GLUE_RESULT_REMOTE)) {
1740                 audio_glue1_res = AST_RTP_GLUE_RESULT_FORBID;
1741         }
1742         if (audio_glue0_res == AST_RTP_GLUE_RESULT_REMOTE && (video_glue0_res == AST_RTP_GLUE_RESULT_FORBID || video_glue0_res == AST_RTP_GLUE_RESULT_REMOTE) && glue0->get_codec) {
1743                 glue0->get_codec(c0, cap0);
1744         }
1745         if (audio_glue1_res == AST_RTP_GLUE_RESULT_REMOTE && (video_glue1_res == AST_RTP_GLUE_RESULT_FORBID || video_glue1_res == AST_RTP_GLUE_RESULT_REMOTE) && glue1->get_codec) {
1746                 glue1->get_codec(c1, cap1);
1747         }
1748
1749         /* If any sort of bridge is forbidden just completely bail out and go back to generic bridging */
1750         if (audio_glue0_res != AST_RTP_GLUE_RESULT_REMOTE || audio_glue1_res != AST_RTP_GLUE_RESULT_REMOTE) {
1751                 goto done;
1752         }
1753
1754         /* Make sure we have matching codecs */
1755         if (!ast_format_cap_has_joint(cap0, cap1)) {
1756                 goto done;
1757         }
1758
1759         /* Bridge media early */
1760         if (glue0->update_peer(c0, instance1, vinstance1, tinstance1, cap1, 0)) {
1761                 ast_log(LOG_WARNING, "Channel '%s' failed to setup early bridge to '%s'\n", ast_channel_name(c0), c1 ? ast_channel_name(c1) : "<unspecified>");
1762         }
1763
1764 done:
1765         ast_channel_unlock(c0);
1766         ast_channel_unlock(c1);
1767
1768         ast_format_cap_destroy(cap0);
1769         ast_format_cap_destroy(cap1);
1770
1771         unref_instance_cond(&instance0);
1772         unref_instance_cond(&instance1);
1773         unref_instance_cond(&vinstance0);
1774         unref_instance_cond(&vinstance1);
1775         unref_instance_cond(&tinstance0);
1776         unref_instance_cond(&tinstance1);
1777
1778         ast_debug(1, "Setting early bridge SDP of '%s' with that of '%s'\n", ast_channel_name(c0), c1 ? ast_channel_name(c1) : "<unspecified>");
1779
1780         return 0;
1781 }
1782
1783 int ast_rtp_red_init(struct ast_rtp_instance *instance, int buffer_time, int *payloads, int generations)
1784 {
1785         return instance->engine->red_init ? instance->engine->red_init(instance, buffer_time, payloads, generations) : -1;
1786 }
1787
1788 int ast_rtp_red_buffer(struct ast_rtp_instance *instance, struct ast_frame *frame)
1789 {
1790         return instance->engine->red_buffer ? instance->engine->red_buffer(instance, frame) : -1;
1791 }
1792
1793 int ast_rtp_instance_get_stats(struct ast_rtp_instance *instance, struct ast_rtp_instance_stats *stats, enum ast_rtp_instance_stat stat)
1794 {
1795         return instance->engine->get_stat ? instance->engine->get_stat(instance, stats, stat) : -1;
1796 }
1797
1798 char *ast_rtp_instance_get_quality(struct ast_rtp_instance *instance, enum ast_rtp_instance_stat_field field, char *buf, size_t size)
1799 {
1800         struct ast_rtp_instance_stats stats = { 0, };
1801         enum ast_rtp_instance_stat stat;
1802
1803         /* Determine what statistics we will need to retrieve based on field passed in */
1804         if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY) {
1805                 stat = AST_RTP_INSTANCE_STAT_ALL;
1806         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_JITTER) {
1807                 stat = AST_RTP_INSTANCE_STAT_COMBINED_JITTER;
1808         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_LOSS) {
1809                 stat = AST_RTP_INSTANCE_STAT_COMBINED_LOSS;
1810         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_RTT) {
1811                 stat = AST_RTP_INSTANCE_STAT_COMBINED_RTT;
1812         } else {
1813                 return NULL;
1814         }
1815
1816         /* Attempt to actually retrieve the statistics we need to generate the quality string */
1817         if (ast_rtp_instance_get_stats(instance, &stats, stat)) {
1818                 return NULL;
1819         }
1820
1821         /* Now actually fill the buffer with the good information */
1822         if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY) {
1823                 snprintf(buf, size, "ssrc=%i;themssrc=%u;lp=%u;rxjitter=%f;rxcount=%u;txjitter=%f;txcount=%u;rlp=%u;rtt=%f",
1824                          stats.local_ssrc, stats.remote_ssrc, stats.rxploss, stats.txjitter, stats.rxcount, stats.rxjitter, stats.txcount, stats.txploss, stats.rtt);
1825         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_JITTER) {
1826                 snprintf(buf, size, "minrxjitter=%f;maxrxjitter=%f;avgrxjitter=%f;stdevrxjitter=%f;reported_minjitter=%f;reported_maxjitter=%f;reported_avgjitter=%f;reported_stdevjitter=%f;",
1827                          stats.local_minjitter, stats.local_maxjitter, stats.local_normdevjitter, sqrt(stats.local_stdevjitter), stats.remote_minjitter, stats.remote_maxjitter, stats.remote_normdevjitter, sqrt(stats.remote_stdevjitter));
1828         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_LOSS) {
1829                 snprintf(buf, size, "minrxlost=%f;maxrxlost=%f;avgrxlost=%f;stdevrxlost=%f;reported_minlost=%f;reported_maxlost=%f;reported_avglost=%f;reported_stdevlost=%f;",
1830                          stats.local_minrxploss, stats.local_maxrxploss, stats.local_normdevrxploss, sqrt(stats.local_stdevrxploss), stats.remote_minrxploss, stats.remote_maxrxploss, stats.remote_normdevrxploss, sqrt(stats.remote_stdevrxploss));
1831         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_RTT) {
1832                 snprintf(buf, size, "minrtt=%f;maxrtt=%f;avgrtt=%f;stdevrtt=%f;", stats.minrtt, stats.maxrtt, stats.normdevrtt, stats.stdevrtt);
1833         }
1834
1835         return buf;
1836 }
1837
1838 void ast_rtp_instance_set_stats_vars(struct ast_channel *chan, struct ast_rtp_instance *instance)
1839 {
1840         char quality_buf[AST_MAX_USER_FIELD], *quality;
1841         struct ast_channel *bridge = ast_bridged_channel(chan);
1842
1843         if ((quality = ast_rtp_instance_get_quality(instance, AST_RTP_INSTANCE_STAT_FIELD_QUALITY, quality_buf, sizeof(quality_buf)))) {
1844                 pbx_builtin_setvar_helper(chan, "RTPAUDIOQOS", quality);
1845                 if (bridge) {
1846                         pbx_builtin_setvar_helper(bridge, "RTPAUDIOQOSBRIDGED", quality);
1847                 }
1848         }
1849
1850         if ((quality = ast_rtp_instance_get_quality(instance, AST_RTP_INSTANCE_STAT_FIELD_QUALITY_JITTER, quality_buf, sizeof(quality_buf)))) {
1851                 pbx_builtin_setvar_helper(chan, "RTPAUDIOQOSJITTER", quality);
1852                 if (bridge) {
1853                         pbx_builtin_setvar_helper(bridge, "RTPAUDIOQOSJITTERBRIDGED", quality);
1854                 }
1855         }
1856
1857         if ((quality = ast_rtp_instance_get_quality(instance, AST_RTP_INSTANCE_STAT_FIELD_QUALITY_LOSS, quality_buf, sizeof(quality_buf)))) {
1858                 pbx_builtin_setvar_helper(chan, "RTPAUDIOQOSLOSS", quality);
1859                 if (bridge) {
1860                         pbx_builtin_setvar_helper(bridge, "RTPAUDIOQOSLOSSBRIDGED", quality);
1861                 }
1862         }
1863
1864         if ((quality = ast_rtp_instance_get_quality(instance, AST_RTP_INSTANCE_STAT_FIELD_QUALITY_RTT, quality_buf, sizeof(quality_buf)))) {
1865                 pbx_builtin_setvar_helper(chan, "RTPAUDIOQOSRTT", quality);
1866                 if (bridge) {
1867                         pbx_builtin_setvar_helper(bridge, "RTPAUDIOQOSRTTBRIDGED", quality);
1868                 }
1869         }
1870 }
1871
1872 int ast_rtp_instance_set_read_format(struct ast_rtp_instance *instance, struct ast_format *format)
1873 {
1874         return instance->engine->set_read_format ? instance->engine->set_read_format(instance, format) : -1;
1875 }
1876
1877 int ast_rtp_instance_set_write_format(struct ast_rtp_instance *instance, struct ast_format *format)
1878 {
1879         return instance->engine->set_write_format ? instance->engine->set_write_format(instance, format) : -1;
1880 }
1881
1882 int ast_rtp_instance_make_compatible(struct ast_channel *chan, struct ast_rtp_instance *instance, struct ast_channel *peer)
1883 {
1884         struct ast_rtp_glue *glue;
1885         struct ast_rtp_instance *peer_instance = NULL;
1886         int res = -1;
1887
1888         if (!instance->engine->make_compatible) {
1889                 return -1;
1890         }
1891
1892         ast_channel_lock(peer);
1893
1894         if (!(glue = ast_rtp_instance_get_glue(ast_channel_tech(peer)->type))) {
1895                 ast_channel_unlock(peer);
1896                 return -1;
1897         }
1898
1899         glue->get_rtp_info(peer, &peer_instance);
1900
1901         if (!peer_instance || peer_instance->engine != instance->engine) {
1902                 ast_channel_unlock(peer);
1903                 ao2_ref(peer_instance, -1);
1904                 peer_instance = NULL;
1905                 return -1;
1906         }
1907
1908         res = instance->engine->make_compatible(chan, instance, peer, peer_instance);
1909
1910         ast_channel_unlock(peer);
1911
1912         ao2_ref(peer_instance, -1);
1913         peer_instance = NULL;
1914
1915         return res;
1916 }
1917
1918 void ast_rtp_instance_available_formats(struct ast_rtp_instance *instance, struct ast_format_cap *to_endpoint, struct ast_format_cap *to_asterisk, struct ast_format_cap *result)
1919 {
1920         if (instance->engine->available_formats) {
1921                 instance->engine->available_formats(instance, to_endpoint, to_asterisk, result);
1922                 if (!ast_format_cap_is_empty(result)) {
1923                         return;
1924                 }
1925         }
1926
1927         ast_translate_available_formats(to_endpoint, to_asterisk, result);
1928 }
1929
1930 int ast_rtp_instance_activate(struct ast_rtp_instance *instance)
1931 {
1932         return instance->engine->activate ? instance->engine->activate(instance) : 0;
1933 }
1934
1935 void ast_rtp_instance_stun_request(struct ast_rtp_instance *instance,
1936                                    struct ast_sockaddr *suggestion,
1937                                    const char *username)
1938 {
1939         if (instance->engine->stun_request) {
1940                 instance->engine->stun_request(instance, suggestion, username);
1941         }
1942 }
1943
1944 void ast_rtp_instance_set_timeout(struct ast_rtp_instance *instance, int timeout)
1945 {
1946         instance->timeout = timeout;
1947 }
1948
1949 void ast_rtp_instance_set_hold_timeout(struct ast_rtp_instance *instance, int timeout)
1950 {
1951         instance->holdtimeout = timeout;
1952 }
1953
1954 void ast_rtp_instance_set_keepalive(struct ast_rtp_instance *instance, int interval)
1955 {
1956         instance->keepalive = interval;
1957 }
1958
1959 int ast_rtp_instance_get_timeout(struct ast_rtp_instance *instance)
1960 {
1961         return instance->timeout;
1962 }
1963
1964 int ast_rtp_instance_get_hold_timeout(struct ast_rtp_instance *instance)
1965 {
1966         return instance->holdtimeout;
1967 }
1968
1969 int ast_rtp_instance_get_keepalive(struct ast_rtp_instance *instance)
1970 {
1971         return instance->keepalive;
1972 }
1973
1974 struct ast_rtp_engine *ast_rtp_instance_get_engine(struct ast_rtp_instance *instance)
1975 {
1976         return instance->engine;
1977 }
1978
1979 struct ast_rtp_glue *ast_rtp_instance_get_active_glue(struct ast_rtp_instance *instance)
1980 {
1981         return instance->glue;
1982 }
1983
1984 struct ast_channel *ast_rtp_instance_get_chan(struct ast_rtp_instance *instance)
1985 {
1986         return instance->chan;
1987 }
1988
1989 int ast_rtp_engine_register_srtp(struct ast_srtp_res *srtp_res, struct ast_srtp_policy_res *policy_res)
1990 {
1991         if (res_srtp || res_srtp_policy) {
1992                 return -1;
1993         }
1994         if (!srtp_res || !policy_res) {
1995                 return -1;
1996         }
1997
1998         res_srtp = srtp_res;
1999         res_srtp_policy = policy_res;
2000
2001         return 0;
2002 }
2003
2004 void ast_rtp_engine_unregister_srtp(void)
2005 {
2006         res_srtp = NULL;
2007         res_srtp_policy = NULL;
2008 }
2009
2010 int ast_rtp_engine_srtp_is_registered(void)
2011 {
2012         return res_srtp && res_srtp_policy;
2013 }
2014
2015 int ast_rtp_instance_add_srtp_policy(struct ast_rtp_instance *instance, struct ast_srtp_policy *remote_policy, struct ast_srtp_policy *local_policy)
2016 {
2017         int res = 0;
2018
2019         if (!res_srtp) {
2020                 return -1;
2021         }
2022
2023         if (!instance->srtp) {
2024                 res = res_srtp->create(&instance->srtp, instance, remote_policy);
2025         } else {
2026                 res = res_srtp->replace(&instance->srtp, instance, remote_policy);
2027         }
2028         if (!res) {
2029                 res = res_srtp->add_stream(instance->srtp, local_policy);
2030         }
2031
2032         return res;
2033 }
2034
2035 struct ast_srtp *ast_rtp_instance_get_srtp(struct ast_rtp_instance *instance)
2036 {
2037         return instance->srtp;
2038 }
2039
2040 int ast_rtp_instance_sendcng(struct ast_rtp_instance *instance, int level)
2041 {
2042         if (instance->engine->sendcng) {
2043                 return instance->engine->sendcng(instance, level);
2044         }
2045
2046         return -1;
2047 }
2048
2049 struct ast_rtp_engine_ice *ast_rtp_instance_get_ice(struct ast_rtp_instance *instance)
2050 {
2051         return instance->engine->ice;
2052 }
2053
2054 struct ast_rtp_engine_dtls *ast_rtp_instance_get_dtls(struct ast_rtp_instance *instance)
2055 {
2056         return instance->engine->dtls;
2057 }
2058
2059 int ast_rtp_dtls_cfg_parse(struct ast_rtp_dtls_cfg *dtls_cfg, const char *name, const char *value)
2060 {
2061         if (!strcasecmp(name, "dtlsenable")) {
2062                 dtls_cfg->enabled = ast_true(value) ? 1 : 0;
2063         } else if (!strcasecmp(name, "dtlsverify")) {
2064                 dtls_cfg->verify = ast_true(value) ? 1 : 0;
2065         } else if (!strcasecmp(name, "dtlsrekey")) {
2066                 if (sscanf(value, "%30u", &dtls_cfg->rekey) != 1) {
2067                         return -1;
2068                 }
2069         } else if (!strcasecmp(name, "dtlscertfile")) {
2070                 ast_free(dtls_cfg->certfile);
2071                 dtls_cfg->certfile = ast_strdup(value);
2072         } else if (!strcasecmp(name, "dtlsprivatekey")) {
2073                 ast_free(dtls_cfg->pvtfile);
2074                 dtls_cfg->pvtfile = ast_strdup(value);
2075         } else if (!strcasecmp(name, "dtlscipher")) {
2076                 ast_free(dtls_cfg->cipher);
2077                 dtls_cfg->cipher = ast_strdup(value);
2078         } else if (!strcasecmp(name, "dtlscafile")) {
2079                 ast_free(dtls_cfg->cafile);
2080                 dtls_cfg->cafile = ast_strdup(value);
2081         } else if (!strcasecmp(name, "dtlscapath") || !strcasecmp(name, "dtlscadir")) {
2082                 ast_free(dtls_cfg->capath);
2083                 dtls_cfg->capath = ast_strdup(value);
2084         } else if (!strcasecmp(name, "dtlssetup")) {
2085                 if (!strcasecmp(value, "active")) {
2086                         dtls_cfg->default_setup = AST_RTP_DTLS_SETUP_ACTIVE;
2087                 } else if (!strcasecmp(value, "passive")) {
2088                         dtls_cfg->default_setup = AST_RTP_DTLS_SETUP_PASSIVE;
2089                 } else if (!strcasecmp(value, "actpass")) {
2090                         dtls_cfg->default_setup = AST_RTP_DTLS_SETUP_ACTPASS;
2091                 }
2092         } else {
2093                 return -1;
2094         }
2095
2096         return 0;
2097 }
2098
2099 void ast_rtp_dtls_cfg_copy(const struct ast_rtp_dtls_cfg *src_cfg, struct ast_rtp_dtls_cfg *dst_cfg)
2100 {
2101         dst_cfg->enabled = src_cfg->enabled;
2102         dst_cfg->verify = src_cfg->verify;
2103         dst_cfg->rekey = src_cfg->rekey;
2104         dst_cfg->suite = src_cfg->suite;
2105         dst_cfg->certfile = ast_strdup(src_cfg->certfile);
2106         dst_cfg->pvtfile = ast_strdup(src_cfg->pvtfile);
2107         dst_cfg->cipher = ast_strdup(src_cfg->cipher);
2108         dst_cfg->cafile = ast_strdup(src_cfg->cafile);
2109         dst_cfg->capath = ast_strdup(src_cfg->capath);
2110         dst_cfg->default_setup = src_cfg->default_setup;
2111 }
2112
2113 void ast_rtp_dtls_cfg_free(struct ast_rtp_dtls_cfg *dtls_cfg)
2114 {
2115         ast_free(dtls_cfg->certfile);
2116         ast_free(dtls_cfg->pvtfile);
2117         ast_free(dtls_cfg->cipher);
2118         ast_free(dtls_cfg->cafile);
2119         ast_free(dtls_cfg->capath);
2120 }
2121
2122 static void set_next_mime_type(const struct ast_format *format, int rtp_code, char *type, char *subtype, unsigned int sample_rate)
2123 {
2124         int x = mime_types_len;
2125         if (ARRAY_LEN(ast_rtp_mime_types) == mime_types_len) {
2126                 return;
2127         }
2128
2129         ast_rwlock_wrlock(&mime_types_lock);
2130         if (format) {
2131                 ast_rtp_mime_types[x].payload_type.asterisk_format = 1;
2132                 ast_format_copy(&ast_rtp_mime_types[x].payload_type.format, format);
2133         } else {
2134                 ast_rtp_mime_types[x].payload_type.rtp_code = rtp_code;
2135         }
2136         ast_rtp_mime_types[x].type = type;
2137         ast_rtp_mime_types[x].subtype = subtype;
2138         ast_rtp_mime_types[x].sample_rate = sample_rate;
2139         mime_types_len++;
2140         ast_rwlock_unlock(&mime_types_lock);
2141 }
2142
2143 static void add_static_payload(int map, const struct ast_format *format, int rtp_code)
2144 {
2145         int x;
2146         ast_rwlock_wrlock(&static_RTP_PT_lock);
2147         if (map < 0) {
2148                 /* find next available dynamic payload slot */
2149                 for (x = 96; x < 127; x++) {
2150                         if (!static_RTP_PT[x].asterisk_format && !static_RTP_PT[x].rtp_code) {
2151                                 map = x;
2152                                 break;
2153                         }
2154                 }
2155         }
2156
2157         if (map < 0) {
2158                 ast_log(LOG_WARNING, "No Dynamic RTP mapping avaliable for format %s\n" ,ast_getformatname(format));
2159                 ast_rwlock_unlock(&static_RTP_PT_lock);
2160                 return;
2161         }
2162
2163         if (format) {
2164                 static_RTP_PT[map].asterisk_format = 1;
2165                 ast_format_copy(&static_RTP_PT[map].format, format);
2166         } else {
2167                 static_RTP_PT[map].rtp_code = rtp_code;
2168         }
2169         ast_rwlock_unlock(&static_RTP_PT_lock);
2170 }
2171
2172 int ast_rtp_engine_load_format(const struct ast_format *format)
2173 {
2174         switch (format->id) {
2175         case AST_FORMAT_SILK:
2176                 set_next_mime_type(format, 0, "audio", "SILK", ast_format_rate(format));
2177                 add_static_payload(-1, format, 0);
2178                 break;
2179         case AST_FORMAT_CELT:
2180                 set_next_mime_type(format, 0, "audio", "CELT", ast_format_rate(format));
2181                 add_static_payload(-1, format, 0);
2182                 break;
2183         default:
2184                 break;
2185         }
2186
2187         return 0;
2188 }
2189
2190 int ast_rtp_engine_unload_format(const struct ast_format *format)
2191 {
2192         int x;
2193         int y = 0;
2194
2195         ast_rwlock_wrlock(&static_RTP_PT_lock);
2196         /* remove everything pertaining to this format id from the lists */
2197         for (x = 0; x < AST_RTP_MAX_PT; x++) {
2198                 if (ast_format_cmp(&static_RTP_PT[x].format, format) == AST_FORMAT_CMP_EQUAL) {
2199                         memset(&static_RTP_PT[x], 0, sizeof(struct ast_rtp_payload_type));
2200                 }
2201         }
2202         ast_rwlock_unlock(&static_RTP_PT_lock);
2203
2204
2205         ast_rwlock_wrlock(&mime_types_lock);
2206         /* rebuild the list skipping the items matching this id */
2207         for (x = 0; x < mime_types_len; x++) {
2208                 if (ast_format_cmp(&ast_rtp_mime_types[x].payload_type.format, format) == AST_FORMAT_CMP_EQUAL) {
2209                         continue;
2210                 }
2211                 ast_rtp_mime_types[y] = ast_rtp_mime_types[x];
2212                 y++;
2213         }
2214         mime_types_len = y;
2215         ast_rwlock_unlock(&mime_types_lock);
2216         return 0;
2217 }
2218
2219 int ast_rtp_engine_init()
2220 {
2221         struct ast_format tmpfmt;
2222
2223         ast_rwlock_init(&mime_types_lock);
2224         ast_rwlock_init(&static_RTP_PT_lock);
2225
2226         /* Define all the RTP mime types available */
2227         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_G723_1, 0), 0, "audio", "G723", 8000);
2228         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_GSM, 0), 0, "audio", "GSM", 8000);
2229         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_ULAW, 0), 0, "audio", "PCMU", 8000);
2230         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_ULAW, 0), 0, "audio", "G711U", 8000);
2231         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_ALAW, 0), 0, "audio", "PCMA", 8000);
2232         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_ALAW, 0), 0, "audio", "G711A", 8000);
2233         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_G726, 0), 0, "audio", "G726-32", 8000);
2234         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_ADPCM, 0), 0, "audio", "DVI4", 8000);
2235         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_SLINEAR, 0), 0, "audio", "L16", 8000);
2236         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_SLINEAR16, 0), 0, "audio", "L16", 16000);
2237         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_SLINEAR16, 0), 0, "audio", "L16-256", 16000);
2238         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_LPC10, 0), 0, "audio", "LPC", 8000);
2239         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_G729A, 0), 0, "audio", "G729", 8000);
2240         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_G729A, 0), 0, "audio", "G729A", 8000);
2241         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_G729A, 0), 0, "audio", "G.729", 8000);
2242         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_SPEEX, 0), 0, "audio", "speex", 8000);
2243         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_SPEEX16, 0), 0,  "audio", "speex", 16000);
2244         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_SPEEX32, 0), 0,  "audio", "speex", 32000);
2245         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_ILBC, 0), 0, "audio", "iLBC", 8000);
2246         /* this is the sample rate listed in the RTP profile for the G.722 codec, *NOT* the actual sample rate of the media stream */
2247         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_G722, 0), 0, "audio", "G722", 8000);
2248         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_G726_AAL2, 0), 0, "audio", "AAL2-G726-32", 8000);
2249         set_next_mime_type(NULL, AST_RTP_DTMF, "audio", "telephone-event", 8000);
2250         set_next_mime_type(NULL, AST_RTP_CISCO_DTMF, "audio", "cisco-telephone-event", 8000);
2251         set_next_mime_type(NULL, AST_RTP_CN, "audio", "CN", 8000);
2252         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_JPEG, 0), 0, "video", "JPEG", 90000);
2253         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_PNG, 0), 0, "video", "PNG", 90000);
2254         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_H261, 0), 0, "video", "H261", 90000);
2255         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_H263, 0), 0, "video", "H263", 90000);
2256         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_H263_PLUS, 0), 0, "video", "h263-1998", 90000);
2257         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_H264, 0), 0, "video", "H264", 90000);
2258         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_MP4_VIDEO, 0), 0, "video", "MP4V-ES", 90000);
2259         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_T140RED, 0), 0, "text", "RED", 1000);
2260         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_T140, 0), 0, "text", "T140", 1000);
2261         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_SIREN7, 0), 0, "audio", "G7221", 16000);
2262         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_SIREN14, 0), 0, "audio", "G7221", 32000);
2263         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_G719, 0), 0, "audio", "G719", 48000);
2264
2265         /* Define the static rtp payload mappings */
2266         add_static_payload(0, ast_format_set(&tmpfmt, AST_FORMAT_ULAW, 0), 0);
2267         #ifdef USE_DEPRECATED_G726
2268         add_static_payload(2, ast_format_set(&tmpfmt, AST_FORMAT_G726, 0), 0);/* Technically this is G.721, but if Cisco can do it, so can we... */
2269         #endif
2270         add_static_payload(3, ast_format_set(&tmpfmt, AST_FORMAT_GSM, 0), 0);
2271         add_static_payload(4, ast_format_set(&tmpfmt, AST_FORMAT_G723_1, 0), 0);
2272         add_static_payload(5, ast_format_set(&tmpfmt, AST_FORMAT_ADPCM, 0), 0);/* 8 kHz */
2273         add_static_payload(6, ast_format_set(&tmpfmt, AST_FORMAT_ADPCM, 0), 0); /* 16 kHz */
2274         add_static_payload(7, ast_format_set(&tmpfmt, AST_FORMAT_LPC10, 0), 0);
2275         add_static_payload(8, ast_format_set(&tmpfmt, AST_FORMAT_ALAW, 0), 0);
2276         add_static_payload(9, ast_format_set(&tmpfmt, AST_FORMAT_G722, 0), 0);
2277         add_static_payload(10, ast_format_set(&tmpfmt, AST_FORMAT_SLINEAR, 0), 0); /* 2 channels */
2278         add_static_payload(11, ast_format_set(&tmpfmt, AST_FORMAT_SLINEAR, 0), 0); /* 1 channel */
2279         add_static_payload(13, NULL, AST_RTP_CN);
2280         add_static_payload(16, ast_format_set(&tmpfmt, AST_FORMAT_ADPCM, 0), 0); /* 11.025 kHz */
2281         add_static_payload(17, ast_format_set(&tmpfmt, AST_FORMAT_ADPCM, 0), 0); /* 22.050 kHz */
2282         add_static_payload(18, ast_format_set(&tmpfmt, AST_FORMAT_G729A, 0), 0);
2283         add_static_payload(19, NULL, AST_RTP_CN);         /* Also used for CN */
2284         add_static_payload(26, ast_format_set(&tmpfmt, AST_FORMAT_JPEG, 0), 0);
2285         add_static_payload(31, ast_format_set(&tmpfmt, AST_FORMAT_H261, 0), 0);
2286         add_static_payload(34, ast_format_set(&tmpfmt, AST_FORMAT_H263, 0), 0);
2287         add_static_payload(97, ast_format_set(&tmpfmt, AST_FORMAT_ILBC, 0), 0);
2288         add_static_payload(98, ast_format_set(&tmpfmt, AST_FORMAT_H263_PLUS, 0), 0);
2289         add_static_payload(99, ast_format_set(&tmpfmt, AST_FORMAT_H264, 0), 0);
2290         add_static_payload(101, NULL, AST_RTP_DTMF);
2291         add_static_payload(102, ast_format_set(&tmpfmt, AST_FORMAT_SIREN7, 0), 0);
2292         add_static_payload(103, ast_format_set(&tmpfmt, AST_FORMAT_H263_PLUS, 0), 0);
2293         add_static_payload(104, ast_format_set(&tmpfmt, AST_FORMAT_MP4_VIDEO, 0), 0);
2294         add_static_payload(105, ast_format_set(&tmpfmt, AST_FORMAT_T140RED, 0), 0);   /* Real time text chat (with redundancy encoding) */
2295         add_static_payload(106, ast_format_set(&tmpfmt, AST_FORMAT_T140, 0), 0);     /* Real time text chat */
2296         add_static_payload(110, ast_format_set(&tmpfmt, AST_FORMAT_SPEEX, 0), 0);
2297         add_static_payload(111, ast_format_set(&tmpfmt, AST_FORMAT_G726, 0), 0);
2298         add_static_payload(112, ast_format_set(&tmpfmt, AST_FORMAT_G726_AAL2, 0), 0);
2299         add_static_payload(115, ast_format_set(&tmpfmt, AST_FORMAT_SIREN14, 0), 0);
2300         add_static_payload(116, ast_format_set(&tmpfmt, AST_FORMAT_G719, 0), 0);
2301         add_static_payload(117, ast_format_set(&tmpfmt, AST_FORMAT_SPEEX16, 0), 0);
2302         add_static_payload(118, ast_format_set(&tmpfmt, AST_FORMAT_SLINEAR16, 0), 0); /* 16 Khz signed linear */
2303         add_static_payload(119, ast_format_set(&tmpfmt, AST_FORMAT_SPEEX32, 0), 0);
2304         add_static_payload(121, NULL, AST_RTP_CISCO_DTMF);   /* Must be type 121 */
2305
2306         return 0;
2307 }