Deprecated macro usage for connected line, redirecting, and CCSS
[asterisk/asterisk.git] / 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(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(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(c0);
1456         while (ast_channel_trylock(c1)) {
1457                 ast_channel_unlock(c0);
1458                 usleep(1);
1459                 ast_channel_lock(c0);
1460         }
1461
1462         if (!cap1 || !cap0) {
1463                 goto done;
1464         }
1465
1466         /* Grab glue that binds each channel to something using the RTP engine */
1467         if (!(glue0 = ast_rtp_instance_get_glue(ast_channel_tech(c0)->type)) || !(glue1 = ast_rtp_instance_get_glue(ast_channel_tech(c1)->type))) {
1468                 ast_debug(1, "Can't find native functions for channel '%s'\n", glue0 ? ast_channel_name(c1) : ast_channel_name(c0));
1469                 goto done;
1470         }
1471
1472         audio_glue0_res = glue0->get_rtp_info(c0, &instance0);
1473         video_glue0_res = glue0->get_vrtp_info ? glue0->get_vrtp_info(c0, &vinstance0) : AST_RTP_GLUE_RESULT_FORBID;
1474
1475         audio_glue1_res = glue1->get_rtp_info(c1, &instance1);
1476         video_glue1_res = glue1->get_vrtp_info ? glue1->get_vrtp_info(c1, &vinstance1) : AST_RTP_GLUE_RESULT_FORBID;
1477
1478         /* If we are carrying video, and both sides are not going to remotely bridge... fail the native bridge */
1479         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)) {
1480                 audio_glue0_res = AST_RTP_GLUE_RESULT_FORBID;
1481         }
1482         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)) {
1483                 audio_glue1_res = AST_RTP_GLUE_RESULT_FORBID;
1484         }
1485         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) {
1486                 glue0->get_codec(c0, cap0);
1487         }
1488         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) {
1489                 glue1->get_codec(c1, cap1);
1490         }
1491
1492         /* If any sort of bridge is forbidden just completely bail out and go back to generic bridging */
1493         if (audio_glue0_res != AST_RTP_GLUE_RESULT_REMOTE || audio_glue1_res != AST_RTP_GLUE_RESULT_REMOTE) {
1494                 goto done;
1495         }
1496
1497         /* Make sure we have matching codecs */
1498         if (!ast_format_cap_has_joint(cap0, cap1)) {
1499                 goto done;
1500         }
1501
1502         ast_rtp_codecs_payloads_copy(&instance0->codecs, &instance1->codecs, instance1);
1503
1504         if (vinstance0 && vinstance1) {
1505                 ast_rtp_codecs_payloads_copy(&vinstance0->codecs, &vinstance1->codecs, vinstance1);
1506         }
1507         if (tinstance0 && tinstance1) {
1508                 ast_rtp_codecs_payloads_copy(&tinstance0->codecs, &tinstance1->codecs, tinstance1);
1509         }
1510
1511         if (glue0->update_peer(c0, instance1, vinstance1, tinstance1, cap1, 0)) {
1512                 ast_log(LOG_WARNING, "Channel '%s' failed to setup early bridge to '%s'\n", ast_channel_name(c0), c1 ? ast_channel_name(c1) : "<unspecified>");
1513         }
1514
1515         res = 0;
1516
1517 done:
1518         ast_channel_unlock(c0);
1519         ast_channel_unlock(c1);
1520
1521         ast_format_cap_destroy(cap0);
1522         ast_format_cap_destroy(cap1);
1523
1524         unref_instance_cond(&instance0);
1525         unref_instance_cond(&instance1);
1526         unref_instance_cond(&vinstance0);
1527         unref_instance_cond(&vinstance1);
1528         unref_instance_cond(&tinstance0);
1529         unref_instance_cond(&tinstance1);
1530
1531         if (!res) {
1532                 ast_debug(1, "Seeded SDP of '%s' with that of '%s'\n", ast_channel_name(c0), c1 ? ast_channel_name(c1) : "<unspecified>");
1533         }
1534 }
1535
1536 int ast_rtp_instance_early_bridge(struct ast_channel *c0, struct ast_channel *c1)
1537 {
1538         struct ast_rtp_instance *instance0 = NULL, *instance1 = NULL,
1539                         *vinstance0 = NULL, *vinstance1 = NULL,
1540                         *tinstance0 = NULL, *tinstance1 = NULL;
1541         struct ast_rtp_glue *glue0, *glue1;
1542         enum ast_rtp_glue_result audio_glue0_res = AST_RTP_GLUE_RESULT_FORBID, video_glue0_res = AST_RTP_GLUE_RESULT_FORBID;
1543         enum ast_rtp_glue_result audio_glue1_res = AST_RTP_GLUE_RESULT_FORBID, video_glue1_res = AST_RTP_GLUE_RESULT_FORBID;
1544         struct ast_format_cap *cap0 = ast_format_cap_alloc_nolock();
1545         struct ast_format_cap *cap1 = ast_format_cap_alloc_nolock();
1546         int res = 0;
1547
1548         /* If there is no second channel just immediately bail out, we are of no use in that scenario */
1549         if (!c1) {
1550                 ast_format_cap_destroy(cap0);
1551                 ast_format_cap_destroy(cap1);
1552                 return -1;
1553         }
1554
1555         /* Lock both channels so we can look for the glue that binds them together */
1556         ast_channel_lock(c0);
1557         while (ast_channel_trylock(c1)) {
1558                 ast_channel_unlock(c0);
1559                 usleep(1);
1560                 ast_channel_lock(c0);
1561         }
1562
1563         if (!cap1 || !cap0) {
1564                 goto done;
1565         }
1566
1567         /* Grab glue that binds each channel to something using the RTP engine */
1568         if (!(glue0 = ast_rtp_instance_get_glue(ast_channel_tech(c0)->type)) || !(glue1 = ast_rtp_instance_get_glue(ast_channel_tech(c1)->type))) {
1569                 ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", glue0 ? ast_channel_name(c1) : ast_channel_name(c0));
1570                 goto done;
1571         }
1572
1573         audio_glue0_res = glue0->get_rtp_info(c0, &instance0);
1574         video_glue0_res = glue0->get_vrtp_info ? glue0->get_vrtp_info(c0, &vinstance0) : AST_RTP_GLUE_RESULT_FORBID;
1575
1576         audio_glue1_res = glue1->get_rtp_info(c1, &instance1);
1577         video_glue1_res = glue1->get_vrtp_info ? glue1->get_vrtp_info(c1, &vinstance1) : AST_RTP_GLUE_RESULT_FORBID;
1578
1579         /* If we are carrying video, and both sides are not going to remotely bridge... fail the native bridge */
1580         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)) {
1581                 audio_glue0_res = AST_RTP_GLUE_RESULT_FORBID;
1582         }
1583         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)) {
1584                 audio_glue1_res = AST_RTP_GLUE_RESULT_FORBID;
1585         }
1586         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) {
1587                 glue0->get_codec(c0, cap0);
1588         }
1589         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) {
1590                 glue1->get_codec(c1, cap1);
1591         }
1592
1593         /* If any sort of bridge is forbidden just completely bail out and go back to generic bridging */
1594         if (audio_glue0_res != AST_RTP_GLUE_RESULT_REMOTE || audio_glue1_res != AST_RTP_GLUE_RESULT_REMOTE) {
1595                 goto done;
1596         }
1597
1598         /* Make sure we have matching codecs */
1599         if (!ast_format_cap_has_joint(cap0, cap1)) {
1600                 goto done;
1601         }
1602
1603         /* Bridge media early */
1604         if (glue0->update_peer(c0, instance1, vinstance1, tinstance1, cap1, 0)) {
1605                 ast_log(LOG_WARNING, "Channel '%s' failed to setup early bridge to '%s'\n", ast_channel_name(c0), c1 ? ast_channel_name(c1) : "<unspecified>");
1606         }
1607
1608         res = 0;
1609
1610 done:
1611         ast_channel_unlock(c0);
1612         ast_channel_unlock(c1);
1613
1614         ast_format_cap_destroy(cap0);
1615         ast_format_cap_destroy(cap1);
1616
1617         unref_instance_cond(&instance0);
1618         unref_instance_cond(&instance1);
1619         unref_instance_cond(&vinstance0);
1620         unref_instance_cond(&vinstance1);
1621         unref_instance_cond(&tinstance0);
1622         unref_instance_cond(&tinstance1);
1623
1624         if (!res) {
1625                 ast_debug(1, "Setting early bridge SDP of '%s' with that of '%s'\n", ast_channel_name(c0), c1 ? ast_channel_name(c1) : "<unspecified>");
1626         }
1627
1628         return res;
1629 }
1630
1631 int ast_rtp_red_init(struct ast_rtp_instance *instance, int buffer_time, int *payloads, int generations)
1632 {
1633         return instance->engine->red_init ? instance->engine->red_init(instance, buffer_time, payloads, generations) : -1;
1634 }
1635
1636 int ast_rtp_red_buffer(struct ast_rtp_instance *instance, struct ast_frame *frame)
1637 {
1638         return instance->engine->red_buffer ? instance->engine->red_buffer(instance, frame) : -1;
1639 }
1640
1641 int ast_rtp_instance_get_stats(struct ast_rtp_instance *instance, struct ast_rtp_instance_stats *stats, enum ast_rtp_instance_stat stat)
1642 {
1643         return instance->engine->get_stat ? instance->engine->get_stat(instance, stats, stat) : -1;
1644 }
1645
1646 char *ast_rtp_instance_get_quality(struct ast_rtp_instance *instance, enum ast_rtp_instance_stat_field field, char *buf, size_t size)
1647 {
1648         struct ast_rtp_instance_stats stats = { 0, };
1649         enum ast_rtp_instance_stat stat;
1650
1651         /* Determine what statistics we will need to retrieve based on field passed in */
1652         if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY) {
1653                 stat = AST_RTP_INSTANCE_STAT_ALL;
1654         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_JITTER) {
1655                 stat = AST_RTP_INSTANCE_STAT_COMBINED_JITTER;
1656         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_LOSS) {
1657                 stat = AST_RTP_INSTANCE_STAT_COMBINED_LOSS;
1658         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_RTT) {
1659                 stat = AST_RTP_INSTANCE_STAT_COMBINED_RTT;
1660         } else {
1661                 return NULL;
1662         }
1663
1664         /* Attempt to actually retrieve the statistics we need to generate the quality string */
1665         if (ast_rtp_instance_get_stats(instance, &stats, stat)) {
1666                 return NULL;
1667         }
1668
1669         /* Now actually fill the buffer with the good information */
1670         if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY) {
1671                 snprintf(buf, size, "ssrc=%i;themssrc=%u;lp=%u;rxjitter=%f;rxcount=%u;txjitter=%f;txcount=%u;rlp=%u;rtt=%f",
1672                          stats.local_ssrc, stats.remote_ssrc, stats.rxploss, stats.txjitter, stats.rxcount, stats.rxjitter, stats.txcount, stats.txploss, stats.rtt);
1673         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_JITTER) {
1674                 snprintf(buf, size, "minrxjitter=%f;maxrxjitter=%f;avgrxjitter=%f;stdevrxjitter=%f;reported_minjitter=%f;reported_maxjitter=%f;reported_avgjitter=%f;reported_stdevjitter=%f;",
1675                          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));
1676         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_LOSS) {
1677                 snprintf(buf, size, "minrxlost=%f;maxrxlost=%f;avgrxlost=%f;stdevrxlost=%f;reported_minlost=%f;reported_maxlost=%f;reported_avglost=%f;reported_stdevlost=%f;",
1678                          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));
1679         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_RTT) {
1680                 snprintf(buf, size, "minrtt=%f;maxrtt=%f;avgrtt=%f;stdevrtt=%f;", stats.minrtt, stats.maxrtt, stats.normdevrtt, stats.stdevrtt);
1681         }
1682
1683         return buf;
1684 }
1685
1686 void ast_rtp_instance_set_stats_vars(struct ast_channel *chan, struct ast_rtp_instance *instance)
1687 {
1688         char quality_buf[AST_MAX_USER_FIELD], *quality;
1689         struct ast_channel *bridge = ast_bridged_channel(chan);
1690
1691         if ((quality = ast_rtp_instance_get_quality(instance, AST_RTP_INSTANCE_STAT_FIELD_QUALITY, quality_buf, sizeof(quality_buf)))) {
1692                 pbx_builtin_setvar_helper(chan, "RTPAUDIOQOS", quality);
1693                 if (bridge) {
1694                         pbx_builtin_setvar_helper(bridge, "RTPAUDIOQOSBRIDGED", quality);
1695                 }
1696         }
1697
1698         if ((quality = ast_rtp_instance_get_quality(instance, AST_RTP_INSTANCE_STAT_FIELD_QUALITY_JITTER, quality_buf, sizeof(quality_buf)))) {
1699                 pbx_builtin_setvar_helper(chan, "RTPAUDIOQOSJITTER", quality);
1700                 if (bridge) {
1701                         pbx_builtin_setvar_helper(bridge, "RTPAUDIOQOSJITTERBRIDGED", quality);
1702                 }
1703         }
1704
1705         if ((quality = ast_rtp_instance_get_quality(instance, AST_RTP_INSTANCE_STAT_FIELD_QUALITY_LOSS, quality_buf, sizeof(quality_buf)))) {
1706                 pbx_builtin_setvar_helper(chan, "RTPAUDIOQOSLOSS", quality);
1707                 if (bridge) {
1708                         pbx_builtin_setvar_helper(bridge, "RTPAUDIOQOSLOSSBRIDGED", quality);
1709                 }
1710         }
1711
1712         if ((quality = ast_rtp_instance_get_quality(instance, AST_RTP_INSTANCE_STAT_FIELD_QUALITY_RTT, quality_buf, sizeof(quality_buf)))) {
1713                 pbx_builtin_setvar_helper(chan, "RTPAUDIOQOSRTT", quality);
1714                 if (bridge) {
1715                         pbx_builtin_setvar_helper(bridge, "RTPAUDIOQOSRTTBRIDGED", quality);
1716                 }
1717         }
1718 }
1719
1720 int ast_rtp_instance_set_read_format(struct ast_rtp_instance *instance, struct ast_format *format)
1721 {
1722         return instance->engine->set_read_format ? instance->engine->set_read_format(instance, format) : -1;
1723 }
1724
1725 int ast_rtp_instance_set_write_format(struct ast_rtp_instance *instance, struct ast_format *format)
1726 {
1727         return instance->engine->set_write_format ? instance->engine->set_write_format(instance, format) : -1;
1728 }
1729
1730 int ast_rtp_instance_make_compatible(struct ast_channel *chan, struct ast_rtp_instance *instance, struct ast_channel *peer)
1731 {
1732         struct ast_rtp_glue *glue;
1733         struct ast_rtp_instance *peer_instance = NULL;
1734         int res = -1;
1735
1736         if (!instance->engine->make_compatible) {
1737                 return -1;
1738         }
1739
1740         ast_channel_lock(peer);
1741
1742         if (!(glue = ast_rtp_instance_get_glue(ast_channel_tech(peer)->type))) {
1743                 ast_channel_unlock(peer);
1744                 return -1;
1745         }
1746
1747         glue->get_rtp_info(peer, &peer_instance);
1748
1749         if (!peer_instance || peer_instance->engine != instance->engine) {
1750                 ast_channel_unlock(peer);
1751                 ao2_ref(peer_instance, -1);
1752                 peer_instance = NULL;
1753                 return -1;
1754         }
1755
1756         res = instance->engine->make_compatible(chan, instance, peer, peer_instance);
1757
1758         ast_channel_unlock(peer);
1759
1760         ao2_ref(peer_instance, -1);
1761         peer_instance = NULL;
1762
1763         return res;
1764 }
1765
1766 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)
1767 {
1768         if (instance->engine->available_formats) {
1769                 instance->engine->available_formats(instance, to_endpoint, to_asterisk, result);
1770                 if (!ast_format_cap_is_empty(result)) {
1771                         return;
1772                 }
1773         }
1774
1775         ast_translate_available_formats(to_endpoint, to_asterisk, result);
1776 }
1777
1778 int ast_rtp_instance_activate(struct ast_rtp_instance *instance)
1779 {
1780         return instance->engine->activate ? instance->engine->activate(instance) : 0;
1781 }
1782
1783 void ast_rtp_instance_stun_request(struct ast_rtp_instance *instance,
1784                                    struct ast_sockaddr *suggestion,
1785                                    const char *username)
1786 {
1787         if (instance->engine->stun_request) {
1788                 instance->engine->stun_request(instance, suggestion, username);
1789         }
1790 }
1791
1792 void ast_rtp_instance_set_timeout(struct ast_rtp_instance *instance, int timeout)
1793 {
1794         instance->timeout = timeout;
1795 }
1796
1797 void ast_rtp_instance_set_hold_timeout(struct ast_rtp_instance *instance, int timeout)
1798 {
1799         instance->holdtimeout = timeout;
1800 }
1801
1802 void ast_rtp_instance_set_keepalive(struct ast_rtp_instance *instance, int interval)
1803 {
1804         instance->keepalive = interval;
1805 }
1806
1807 int ast_rtp_instance_get_timeout(struct ast_rtp_instance *instance)
1808 {
1809         return instance->timeout;
1810 }
1811
1812 int ast_rtp_instance_get_hold_timeout(struct ast_rtp_instance *instance)
1813 {
1814         return instance->holdtimeout;
1815 }
1816
1817 int ast_rtp_instance_get_keepalive(struct ast_rtp_instance *instance)
1818 {
1819         return instance->keepalive;
1820 }
1821
1822 struct ast_rtp_engine *ast_rtp_instance_get_engine(struct ast_rtp_instance *instance)
1823 {
1824         return instance->engine;
1825 }
1826
1827 struct ast_rtp_glue *ast_rtp_instance_get_active_glue(struct ast_rtp_instance *instance)
1828 {
1829         return instance->glue;
1830 }
1831
1832 struct ast_channel *ast_rtp_instance_get_chan(struct ast_rtp_instance *instance)
1833 {
1834         return instance->chan;
1835 }
1836
1837 int ast_rtp_engine_register_srtp(struct ast_srtp_res *srtp_res, struct ast_srtp_policy_res *policy_res)
1838 {
1839         if (res_srtp || res_srtp_policy) {
1840                 return -1;
1841         }
1842         if (!srtp_res || !policy_res) {
1843                 return -1;
1844         }
1845
1846         res_srtp = srtp_res;
1847         res_srtp_policy = policy_res;
1848
1849         return 0;
1850 }
1851
1852 void ast_rtp_engine_unregister_srtp(void)
1853 {
1854         res_srtp = NULL;
1855         res_srtp_policy = NULL;
1856 }
1857
1858 int ast_rtp_engine_srtp_is_registered(void)
1859 {
1860         return res_srtp && res_srtp_policy;
1861 }
1862
1863 int ast_rtp_instance_add_srtp_policy(struct ast_rtp_instance *instance, struct ast_srtp_policy *remote_policy, struct ast_srtp_policy *local_policy)
1864 {
1865         int res = 0;
1866
1867         if (!res_srtp) {
1868                 return -1;
1869         }
1870
1871         if (!instance->srtp) {
1872                 res = res_srtp->create(&instance->srtp, instance, remote_policy);
1873         } else {
1874                 res = res_srtp->replace(&instance->srtp, instance, remote_policy);
1875         }
1876         if (!res) {
1877                 res = res_srtp->add_stream(instance->srtp, local_policy);
1878         }
1879
1880         return res;
1881 }
1882
1883 struct ast_srtp *ast_rtp_instance_get_srtp(struct ast_rtp_instance *instance)
1884 {
1885         return instance->srtp;
1886 }
1887
1888 int ast_rtp_instance_sendcng(struct ast_rtp_instance *instance, int level)
1889 {
1890         if (instance->engine->sendcng) {
1891                 return instance->engine->sendcng(instance, level);
1892         }
1893
1894         return -1;
1895 }
1896
1897 static void set_next_mime_type(const struct ast_format *format, int rtp_code, char *type, char *subtype, unsigned int sample_rate)
1898 {
1899         int x = mime_types_len;
1900         if (ARRAY_LEN(ast_rtp_mime_types) == mime_types_len) {
1901                 return;
1902         }
1903
1904         ast_rwlock_wrlock(&mime_types_lock);
1905         if (format) {
1906                 ast_rtp_mime_types[x].payload_type.asterisk_format = 1;
1907                 ast_format_copy(&ast_rtp_mime_types[x].payload_type.format, format);
1908         } else {
1909                 ast_rtp_mime_types[x].payload_type.rtp_code = rtp_code;
1910         }
1911         ast_rtp_mime_types[x].type = type;
1912         ast_rtp_mime_types[x].subtype = subtype;
1913         ast_rtp_mime_types[x].sample_rate = sample_rate;
1914         mime_types_len++;
1915         ast_rwlock_unlock(&mime_types_lock);
1916 }
1917
1918 static void add_static_payload(int map, const struct ast_format *format, int rtp_code)
1919 {
1920         int x;
1921         ast_rwlock_wrlock(&static_RTP_PT_lock);
1922         if (map < 0) {
1923                 /* find next available dynamic payload slot */
1924                 for (x = 96; x < 127; x++) {
1925                         if (!static_RTP_PT[x].asterisk_format && !static_RTP_PT[x].rtp_code) {
1926                                 map = x;
1927                                 break;
1928                         }
1929                 }
1930         }
1931
1932         if (map < 0) {
1933                 ast_log(LOG_WARNING, "No Dynamic RTP mapping avaliable for format %s\n" ,ast_getformatname(format));
1934                 ast_rwlock_unlock(&static_RTP_PT_lock);
1935                 return;
1936         }
1937
1938         if (format) {
1939                 static_RTP_PT[map].asterisk_format = 1;
1940                 ast_format_copy(&static_RTP_PT[map].format, format);
1941         } else {
1942                 static_RTP_PT[map].rtp_code = rtp_code;
1943         }
1944         ast_rwlock_unlock(&static_RTP_PT_lock);
1945 }
1946
1947 int ast_rtp_engine_load_format(const struct ast_format *format)
1948 {
1949         switch (format->id) {
1950         case AST_FORMAT_SILK:
1951                 set_next_mime_type(format, 0, "audio", "SILK", ast_format_rate(format));
1952                 add_static_payload(-1, format, 0);
1953                 break;
1954         case AST_FORMAT_CELT:
1955                 set_next_mime_type(format, 0, "audio", "CELT", ast_format_rate(format));
1956                 add_static_payload(-1, format, 0);
1957                 break;
1958         default:
1959                 break;
1960         }
1961
1962         return 0;
1963 }
1964
1965 int ast_rtp_engine_unload_format(const struct ast_format *format)
1966 {
1967         int x;
1968         int y = 0;
1969
1970         ast_rwlock_wrlock(&static_RTP_PT_lock);
1971         /* remove everything pertaining to this format id from the lists */
1972         for (x = 0; x < AST_RTP_MAX_PT; x++) {
1973                 if (ast_format_cmp(&static_RTP_PT[x].format, format) == AST_FORMAT_CMP_EQUAL) {
1974                         memset(&static_RTP_PT[x], 0, sizeof(struct ast_rtp_payload_type));
1975                 }
1976         }
1977         ast_rwlock_unlock(&static_RTP_PT_lock);
1978
1979
1980         ast_rwlock_wrlock(&mime_types_lock);
1981         /* rebuild the list skipping the items matching this id */
1982         for (x = 0; x < mime_types_len; x++) {
1983                 if (ast_format_cmp(&ast_rtp_mime_types[x].payload_type.format, format) == AST_FORMAT_CMP_EQUAL) {
1984                         continue;
1985                 }
1986                 ast_rtp_mime_types[y] = ast_rtp_mime_types[x];
1987                 y++;
1988         }
1989         mime_types_len = y;
1990         ast_rwlock_unlock(&mime_types_lock);
1991         return 0;
1992 }
1993
1994 int ast_rtp_engine_init()
1995 {
1996         struct ast_format tmpfmt;
1997
1998         ast_rwlock_init(&mime_types_lock);
1999         ast_rwlock_init(&static_RTP_PT_lock);
2000
2001         /* Define all the RTP mime types available */
2002         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_G723_1, 0), 0, "audio", "G723", 8000);
2003         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_GSM, 0), 0, "audio", "GSM", 8000);
2004         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_ULAW, 0), 0, "audio", "PCMU", 8000);
2005         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_ULAW, 0), 0, "audio", "G711U", 8000);
2006         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_ALAW, 0), 0, "audio", "PCMA", 8000);
2007         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_ALAW, 0), 0, "audio", "G711A", 8000);
2008         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_G726, 0), 0, "audio", "G726-32", 8000);
2009         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_ADPCM, 0), 0, "audio", "DVI4", 8000);
2010         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_SLINEAR, 0), 0, "audio", "L16", 8000);
2011         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_SLINEAR16, 0), 0, "audio", "L16", 16000);
2012         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_SLINEAR16, 0), 0, "audio", "L16-256", 16000);
2013         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_LPC10, 0), 0, "audio", "LPC", 8000);
2014         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_G729A, 0), 0, "audio", "G729", 8000);
2015         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_G729A, 0), 0, "audio", "G729A", 8000);
2016         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_G729A, 0), 0, "audio", "G.729", 8000);
2017         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_SPEEX, 0), 0, "audio", "speex", 8000);
2018         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_SPEEX16, 0), 0,  "audio", "speex", 16000);
2019         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_SPEEX32, 0), 0,  "audio", "speex", 32000);
2020         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_ILBC, 0), 0, "audio", "iLBC", 8000);
2021         /* this is the sample rate listed in the RTP profile for the G.722 codec, *NOT* the actual sample rate of the media stream */
2022         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_G722, 0), 0, "audio", "G722", 8000);
2023         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_G726_AAL2, 0), 0, "audio", "AAL2-G726-32", 8000);
2024         set_next_mime_type(NULL, AST_RTP_DTMF, "audio", "telephone-event", 8000);
2025         set_next_mime_type(NULL, AST_RTP_CISCO_DTMF, "audio", "cisco-telephone-event", 8000);
2026         set_next_mime_type(NULL, AST_RTP_CN, "audio", "CN", 8000);
2027         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_JPEG, 0), 0, "video", "JPEG", 90000);
2028         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_PNG, 0), 0, "video", "PNG", 90000);
2029         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_H261, 0), 0, "video", "H261", 90000);
2030         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_H263, 0), 0, "video", "H263", 90000);
2031         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_H263_PLUS, 0), 0, "video", "h263-1998", 90000);
2032         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_H264, 0), 0, "video", "H264", 90000);
2033         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_MP4_VIDEO, 0), 0, "video", "MP4V-ES", 90000);
2034         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_T140RED, 0), 0, "text", "RED", 1000);
2035         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_T140, 0), 0, "text", "T140", 1000);
2036         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_SIREN7, 0), 0, "audio", "G7221", 16000);
2037         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_SIREN14, 0), 0, "audio", "G7221", 32000);
2038         set_next_mime_type(ast_format_set(&tmpfmt, AST_FORMAT_G719, 0), 0, "audio", "G719", 48000);
2039
2040         /* Define the static rtp payload mappings */
2041         add_static_payload(0, ast_format_set(&tmpfmt, AST_FORMAT_ULAW, 0), 0);
2042         #ifdef USE_DEPRECATED_G726
2043         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... */
2044         #endif
2045         add_static_payload(3, ast_format_set(&tmpfmt, AST_FORMAT_GSM, 0), 0);
2046         add_static_payload(4, ast_format_set(&tmpfmt, AST_FORMAT_G723_1, 0), 0);
2047         add_static_payload(5, ast_format_set(&tmpfmt, AST_FORMAT_ADPCM, 0), 0);/* 8 kHz */
2048         add_static_payload(6, ast_format_set(&tmpfmt, AST_FORMAT_ADPCM, 0), 0); /* 16 kHz */
2049         add_static_payload(7, ast_format_set(&tmpfmt, AST_FORMAT_LPC10, 0), 0);
2050         add_static_payload(8, ast_format_set(&tmpfmt, AST_FORMAT_ALAW, 0), 0);
2051         add_static_payload(9, ast_format_set(&tmpfmt, AST_FORMAT_G722, 0), 0);
2052         add_static_payload(10, ast_format_set(&tmpfmt, AST_FORMAT_SLINEAR, 0), 0); /* 2 channels */
2053         add_static_payload(11, ast_format_set(&tmpfmt, AST_FORMAT_SLINEAR, 0), 0); /* 1 channel */
2054         add_static_payload(13, NULL, AST_RTP_CN);
2055         add_static_payload(16, ast_format_set(&tmpfmt, AST_FORMAT_ADPCM, 0), 0); /* 11.025 kHz */
2056         add_static_payload(17, ast_format_set(&tmpfmt, AST_FORMAT_ADPCM, 0), 0); /* 22.050 kHz */
2057         add_static_payload(18, ast_format_set(&tmpfmt, AST_FORMAT_G729A, 0), 0);
2058         add_static_payload(19, NULL, AST_RTP_CN);         /* Also used for CN */
2059         add_static_payload(26, ast_format_set(&tmpfmt, AST_FORMAT_JPEG, 0), 0);
2060         add_static_payload(31, ast_format_set(&tmpfmt, AST_FORMAT_H261, 0), 0);
2061         add_static_payload(34, ast_format_set(&tmpfmt, AST_FORMAT_H263, 0), 0);
2062         add_static_payload(97, ast_format_set(&tmpfmt, AST_FORMAT_ILBC, 0), 0);
2063         add_static_payload(98, ast_format_set(&tmpfmt, AST_FORMAT_H263_PLUS, 0), 0);
2064         add_static_payload(99, ast_format_set(&tmpfmt, AST_FORMAT_H264, 0), 0);
2065         add_static_payload(101, NULL, AST_RTP_DTMF);
2066         add_static_payload(102, ast_format_set(&tmpfmt, AST_FORMAT_SIREN7, 0), 0);
2067         add_static_payload(103, ast_format_set(&tmpfmt, AST_FORMAT_H263_PLUS, 0), 0);
2068         add_static_payload(104, ast_format_set(&tmpfmt, AST_FORMAT_MP4_VIDEO, 0), 0);
2069         add_static_payload(105, ast_format_set(&tmpfmt, AST_FORMAT_T140RED, 0), 0);   /* Real time text chat (with redundancy encoding) */
2070         add_static_payload(106, ast_format_set(&tmpfmt, AST_FORMAT_T140, 0), 0);     /* Real time text chat */
2071         add_static_payload(110, ast_format_set(&tmpfmt, AST_FORMAT_SPEEX, 0), 0);
2072         add_static_payload(111, ast_format_set(&tmpfmt, AST_FORMAT_G726, 0), 0);
2073         add_static_payload(112, ast_format_set(&tmpfmt, AST_FORMAT_G726_AAL2, 0), 0);
2074         add_static_payload(115, ast_format_set(&tmpfmt, AST_FORMAT_SIREN14, 0), 0);
2075         add_static_payload(116, ast_format_set(&tmpfmt, AST_FORMAT_G719, 0), 0);
2076         add_static_payload(117, ast_format_set(&tmpfmt, AST_FORMAT_SPEEX16, 0), 0);
2077         add_static_payload(118, ast_format_set(&tmpfmt, AST_FORMAT_SLINEAR16, 0), 0); /* 16 Khz signed linear */
2078         add_static_payload(119, ast_format_set(&tmpfmt, AST_FORMAT_SPEEX32, 0), 0);
2079         add_static_payload(121, NULL, AST_RTP_CISCO_DTMF);   /* Must be type 121 */
2080
2081         return 0;
2082 }