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