Replace most uses of ast_register_atexit with ast_register_cleanup.
[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 /*** MODULEINFO
27         <support_level>core</support_level>
28 ***/
29
30 /*** DOCUMENTATION
31         <managerEvent language="en_US" name="RTCPSent">
32                 <managerEventInstance class="EVENT_FLAG_REPORTING">
33                         <synopsis>Raised when an RTCP packet is sent.</synopsis>
34                         <syntax>
35                                 <channel_snapshot/>
36                                 <parameter name="SSRC">
37                                         <para>The SSRC identifier for our stream</para>
38                                 </parameter>
39                                 <parameter name="PT">
40                                         <para>The type of packet for this RTCP report.</para>
41                                         <enumlist>
42                                                 <enum name="200(SR)"/>
43                                                 <enum name="201(RR)"/>
44                                         </enumlist>
45                                 </parameter>
46                                 <parameter name="To">
47                                         <para>The address the report is sent to.</para>
48                                 </parameter>
49                                 <parameter name="ReportCount">
50                                         <para>The number of reports that were sent.</para>
51                                         <para>The report count determines the number of ReportX headers in
52                                         the message. The X for each set of report headers will range from 0 to
53                                         <literal>ReportCount - 1</literal>.</para>
54                                 </parameter>
55                                 <parameter name="SentNTP" required="false">
56                                         <para>The time the sender generated the report. Only valid when
57                                         PT is <literal>200(SR)</literal>.</para>
58                                 </parameter>
59                                 <parameter name="SentRTP" required="false">
60                                         <para>The sender's last RTP timestamp. Only valid when PT is
61                                         <literal>200(SR)</literal>.</para>
62                                 </parameter>
63                                 <parameter name="SentPackets" required="false">
64                                         <para>The number of packets the sender has sent. Only valid when PT
65                                         is <literal>200(SR)</literal>.</para>
66                                 </parameter>
67                                 <parameter name="SentOctets" required="false">
68                                         <para>The number of bytes the sender has sent. Only valid when PT is
69                                         <literal>200(SR)</literal>.</para>
70                                 </parameter>
71                                 <parameter name="ReportXSourceSSRC">
72                                         <para>The SSRC for the source of this report block.</para>
73                                 </parameter>
74                                 <parameter name="ReportXFractionLost">
75                                         <para>The fraction of RTP data packets from <literal>ReportXSourceSSRC</literal>
76                                         lost since the previous SR or RR report was sent.</para>
77                                 </parameter>
78                                 <parameter name="ReportXCumulativeLost">
79                                         <para>The total number of RTP data packets from <literal>ReportXSourceSSRC</literal>
80                                         lost since the beginning of reception.</para>
81                                 </parameter>
82                                 <parameter name="ReportXHighestSequence">
83                                         <para>The highest sequence number received in an RTP data packet from
84                                         <literal>ReportXSourceSSRC</literal>.</para>
85                                 </parameter>
86                                 <parameter name="ReportXSequenceNumberCycles">
87                                         <para>The number of sequence number cycles seen for the RTP data
88                                         received from <literal>ReportXSourceSSRC</literal>.</para>
89                                 </parameter>
90                                 <parameter name="ReportXIAJitter">
91                                         <para>An estimate of the statistical variance of the RTP data packet
92                                         interarrival time, measured in timestamp units.</para>
93                                 </parameter>
94                                 <parameter name="ReportXLSR">
95                                         <para>The last SR timestamp received from <literal>ReportXSourceSSRC</literal>.
96                                         If no SR has been received from <literal>ReportXSourceSSRC</literal>,
97                                         then 0.</para>
98                                 </parameter>
99                                 <parameter name="ReportXDLSR">
100                                         <para>The delay, expressed in units of 1/65536 seconds, between
101                                         receiving the last SR packet from <literal>ReportXSourceSSRC</literal>
102                                         and sending this report.</para>
103                                 </parameter>
104                         </syntax>
105                 </managerEventInstance>
106         </managerEvent>
107         <managerEvent language="en_US" name="RTCPReceived">
108                 <managerEventInstance class="EVENT_FLAG_REPORTING">
109                         <synopsis>Raised when an RTCP packet is received.</synopsis>
110                         <syntax>
111                                 <channel_snapshot/>
112                                 <parameter name="SSRC">
113                                         <para>The SSRC identifier for the remote system</para>
114                                 </parameter>
115                                 <xi:include xpointer="xpointer(/docs/managerEvent[@name='RTCPSent']/managerEventInstance/syntax/parameter[@name='PT'])" />
116                                 <parameter name="From">
117                                         <para>The address the report was received from.</para>
118                                 </parameter>
119                                 <parameter name="RTT">
120                                         <para>Calculated Round-Trip Time in seconds</para>
121                                 </parameter>
122                                 <parameter name="ReportCount">
123                                         <para>The number of reports that were received.</para>
124                                         <para>The report count determines the number of ReportX headers in
125                                         the message. The X for each set of report headers will range from 0 to
126                                         <literal>ReportCount - 1</literal>.</para>
127                                 </parameter>
128                                 <xi:include xpointer="xpointer(/docs/managerEvent[@name='RTCPSent']/managerEventInstance/syntax/parameter[@name='SentNTP'])" />
129                                 <xi:include xpointer="xpointer(/docs/managerEvent[@name='RTCPSent']/managerEventInstance/syntax/parameter[@name='SentRTP'])" />
130                                 <xi:include xpointer="xpointer(/docs/managerEvent[@name='RTCPSent']/managerEventInstance/syntax/parameter[@name='SentPackets'])" />
131                                 <xi:include xpointer="xpointer(/docs/managerEvent[@name='RTCPSent']/managerEventInstance/syntax/parameter[@name='SentOctets'])" />
132                                 <xi:include xpointer="xpointer(/docs/managerEvent[@name='RTCPSent']/managerEventInstance/syntax/parameter[contains(@name, 'ReportX')])" />
133                         </syntax>
134                 </managerEventInstance>
135         </managerEvent>
136  ***/
137
138 #include "asterisk.h"
139
140 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
141
142 #include <math.h>
143
144 #include "asterisk/channel.h"
145 #include "asterisk/frame.h"
146 #include "asterisk/module.h"
147 #include "asterisk/rtp_engine.h"
148 #include "asterisk/manager.h"
149 #include "asterisk/options.h"
150 #include "asterisk/astobj2.h"
151 #include "asterisk/pbx.h"
152 #include "asterisk/translate.h"
153 #include "asterisk/netsock2.h"
154 #include "asterisk/_private.h"
155 #include "asterisk/framehook.h"
156 #include "asterisk/stasis.h"
157 #include "asterisk/json.h"
158 #include "asterisk/stasis_channels.h"
159
160 struct ast_srtp_res *res_srtp = NULL;
161 struct ast_srtp_policy_res *res_srtp_policy = NULL;
162
163 /*! Structure that represents an RTP session (instance) */
164 struct ast_rtp_instance {
165         /*! Engine that is handling this RTP instance */
166         struct ast_rtp_engine *engine;
167         /*! Data unique to the RTP engine */
168         void *data;
169         /*! RTP properties that have been set and their value */
170         int properties[AST_RTP_PROPERTY_MAX];
171         /*! Address that we are expecting RTP to come in to */
172         struct ast_sockaddr local_address;
173         /*! The original source address */
174         struct ast_sockaddr requested_target_address;
175         /*! Address that we are sending RTP to */
176         struct ast_sockaddr incoming_source_address;
177         /*! Instance that we are bridged to if doing remote or local bridging */
178         struct ast_rtp_instance *bridged;
179         /*! Payload and packetization information */
180         struct ast_rtp_codecs codecs;
181         /*! RTP timeout time (negative or zero means disabled, negative value means temporarily disabled) */
182         int timeout;
183         /*! RTP timeout when on hold (negative or zero means disabled, negative value means temporarily disabled). */
184         int holdtimeout;
185         /*! RTP keepalive interval */
186         int keepalive;
187         /*! Glue currently in use */
188         struct ast_rtp_glue *glue;
189         /*! SRTP info associated with the instance */
190         struct ast_srtp *srtp;
191         /*! Channel unique ID */
192         char channel_uniqueid[AST_MAX_UNIQUEID];
193 };
194
195 /*! List of RTP engines that are currently registered */
196 static AST_RWLIST_HEAD_STATIC(engines, ast_rtp_engine);
197
198 /*! List of RTP glues */
199 static AST_RWLIST_HEAD_STATIC(glues, ast_rtp_glue);
200
201 #define MAX_RTP_MIME_TYPES 128
202
203 /*! The following array defines the MIME Media type (and subtype) for each
204    of our codecs, or RTP-specific data type. */
205 static struct ast_rtp_mime_type {
206         /*! \brief A mapping object between the Asterisk codec and this RTP payload */
207         struct ast_rtp_payload_type payload_type;
208         /*! \brief The media type */
209         char type[16];
210         /*! \brief The format type */
211         char subtype[64];
212         /*! \brief Expected sample rate of the /c subtype */
213         unsigned int sample_rate;
214 } ast_rtp_mime_types[128]; /* This will Likely not need to grow any time soon. */
215 static ast_rwlock_t mime_types_lock;
216 static int mime_types_len = 0;
217
218 /*!
219  * \brief Mapping between Asterisk codecs and rtp payload types
220  *
221  * Static (i.e., well-known) RTP payload types for our "AST_FORMAT..."s:
222  * also, our own choices for dynamic payload types.  This is our master
223  * table for transmission
224  *
225  * See http://www.iana.org/assignments/rtp-parameters for a list of
226  * assigned values
227  */
228 static struct ast_rtp_payload_type static_RTP_PT[AST_RTP_MAX_PT];
229 static ast_rwlock_t static_RTP_PT_lock;
230
231 /*! \brief \ref stasis topic for RTP related messages */
232 static struct stasis_topic *rtp_topic;
233
234
235 /*! \internal \brief Destructor for \c ast_rtp_payload_type */
236 static void rtp_payload_type_dtor(void *obj)
237 {
238         struct ast_rtp_payload_type *payload = obj;
239
240         ao2_cleanup(payload->format);
241 }
242
243 struct ast_rtp_payload_type *ast_rtp_engine_alloc_payload_type(void)
244 {
245         struct ast_rtp_payload_type *payload;
246
247         payload = ao2_alloc(sizeof(*payload), rtp_payload_type_dtor);
248
249         return payload;
250 }
251
252 int ast_rtp_engine_register2(struct ast_rtp_engine *engine, struct ast_module *module)
253 {
254         struct ast_rtp_engine *current_engine;
255
256         /* Perform a sanity check on the engine structure to make sure it has the basics */
257         if (ast_strlen_zero(engine->name) || !engine->new || !engine->destroy || !engine->write || !engine->read) {
258                 ast_log(LOG_WARNING, "RTP Engine '%s' failed sanity check so it was not registered.\n", !ast_strlen_zero(engine->name) ? engine->name : "Unknown");
259                 return -1;
260         }
261
262         /* Link owner module to the RTP engine for reference counting purposes */
263         engine->mod = module;
264
265         AST_RWLIST_WRLOCK(&engines);
266
267         /* Ensure that no two modules with the same name are registered at the same time */
268         AST_RWLIST_TRAVERSE(&engines, current_engine, entry) {
269                 if (!strcmp(current_engine->name, engine->name)) {
270                         ast_log(LOG_WARNING, "An RTP engine with the name '%s' has already been registered.\n", engine->name);
271                         AST_RWLIST_UNLOCK(&engines);
272                         return -1;
273                 }
274         }
275
276         /* The engine survived our critique. Off to the list it goes to be used */
277         AST_RWLIST_INSERT_TAIL(&engines, engine, entry);
278
279         AST_RWLIST_UNLOCK(&engines);
280
281         ast_verb(2, "Registered RTP engine '%s'\n", engine->name);
282
283         return 0;
284 }
285
286 int ast_rtp_engine_unregister(struct ast_rtp_engine *engine)
287 {
288         struct ast_rtp_engine *current_engine = NULL;
289
290         AST_RWLIST_WRLOCK(&engines);
291
292         if ((current_engine = AST_RWLIST_REMOVE(&engines, engine, entry))) {
293                 ast_verb(2, "Unregistered RTP engine '%s'\n", engine->name);
294         }
295
296         AST_RWLIST_UNLOCK(&engines);
297
298         return current_engine ? 0 : -1;
299 }
300
301 int ast_rtp_glue_register2(struct ast_rtp_glue *glue, struct ast_module *module)
302 {
303         struct ast_rtp_glue *current_glue = NULL;
304
305         if (ast_strlen_zero(glue->type)) {
306                 return -1;
307         }
308
309         glue->mod = module;
310
311         AST_RWLIST_WRLOCK(&glues);
312
313         AST_RWLIST_TRAVERSE(&glues, current_glue, entry) {
314                 if (!strcasecmp(current_glue->type, glue->type)) {
315                         ast_log(LOG_WARNING, "RTP glue with the name '%s' has already been registered.\n", glue->type);
316                         AST_RWLIST_UNLOCK(&glues);
317                         return -1;
318                 }
319         }
320
321         AST_RWLIST_INSERT_TAIL(&glues, glue, entry);
322
323         AST_RWLIST_UNLOCK(&glues);
324
325         ast_verb(2, "Registered RTP glue '%s'\n", glue->type);
326
327         return 0;
328 }
329
330 int ast_rtp_glue_unregister(struct ast_rtp_glue *glue)
331 {
332         struct ast_rtp_glue *current_glue = NULL;
333
334         AST_RWLIST_WRLOCK(&glues);
335
336         if ((current_glue = AST_RWLIST_REMOVE(&glues, glue, entry))) {
337                 ast_verb(2, "Unregistered RTP glue '%s'\n", glue->type);
338         }
339
340         AST_RWLIST_UNLOCK(&glues);
341
342         return current_glue ? 0 : -1;
343 }
344
345 static void instance_destructor(void *obj)
346 {
347         struct ast_rtp_instance *instance = obj;
348
349         /* Pass us off to the engine to destroy */
350         if (instance->data && instance->engine->destroy(instance)) {
351                 ast_debug(1, "Engine '%s' failed to destroy RTP instance '%p'\n", instance->engine->name, instance);
352                 return;
353         }
354
355         if (instance->srtp) {
356                 res_srtp->destroy(instance->srtp);
357         }
358
359         ast_rtp_codecs_payloads_destroy(&instance->codecs);
360
361         /* Drop our engine reference */
362         ast_module_unref(instance->engine->mod);
363
364         ast_debug(1, "Destroyed RTP instance '%p'\n", instance);
365 }
366
367 int ast_rtp_instance_destroy(struct ast_rtp_instance *instance)
368 {
369         ao2_ref(instance, -1);
370
371         return 0;
372 }
373
374 struct ast_rtp_instance *ast_rtp_instance_new(const char *engine_name,
375                 struct ast_sched_context *sched, const struct ast_sockaddr *sa,
376                 void *data)
377 {
378         struct ast_sockaddr address = {{0,}};
379         struct ast_rtp_instance *instance = NULL;
380         struct ast_rtp_engine *engine = NULL;
381
382         AST_RWLIST_RDLOCK(&engines);
383
384         /* If an engine name was specified try to use it or otherwise use the first one registered */
385         if (!ast_strlen_zero(engine_name)) {
386                 AST_RWLIST_TRAVERSE(&engines, engine, entry) {
387                         if (!strcmp(engine->name, engine_name)) {
388                                 break;
389                         }
390                 }
391         } else {
392                 engine = AST_RWLIST_FIRST(&engines);
393         }
394
395         /* If no engine was actually found bail out now */
396         if (!engine) {
397                 ast_log(LOG_ERROR, "No RTP engine was found. Do you have one loaded?\n");
398                 AST_RWLIST_UNLOCK(&engines);
399                 return NULL;
400         }
401
402         /* Bump up the reference count before we return so the module can not be unloaded */
403         ast_module_ref(engine->mod);
404
405         AST_RWLIST_UNLOCK(&engines);
406
407         /* Allocate a new RTP instance */
408         if (!(instance = ao2_alloc(sizeof(*instance), instance_destructor))) {
409                 ast_module_unref(engine->mod);
410                 return NULL;
411         }
412         instance->engine = engine;
413         ast_sockaddr_copy(&instance->local_address, sa);
414         ast_sockaddr_copy(&address, sa);
415
416         if (ast_rtp_codecs_payloads_initialize(&instance->codecs)) {
417                 ao2_ref(instance, -1);
418                 return NULL;
419         }
420
421         ast_debug(1, "Using engine '%s' for RTP instance '%p'\n", engine->name, instance);
422
423         /* And pass it off to the engine to setup */
424         if (instance->engine->new(instance, sched, &address, data)) {
425                 ast_debug(1, "Engine '%s' failed to setup RTP instance '%p'\n", engine->name, instance);
426                 ao2_ref(instance, -1);
427                 return NULL;
428         }
429
430         ast_debug(1, "RTP instance '%p' is setup and ready to go\n", instance);
431
432         return instance;
433 }
434
435 const char *ast_rtp_instance_get_channel_id(struct ast_rtp_instance *instance)
436 {
437         return instance->channel_uniqueid;
438 }
439
440 void ast_rtp_instance_set_channel_id(struct ast_rtp_instance *instance, const char *uniqueid)
441 {
442         ast_copy_string(instance->channel_uniqueid, uniqueid, sizeof(instance->channel_uniqueid));
443 }
444
445 void ast_rtp_instance_set_data(struct ast_rtp_instance *instance, void *data)
446 {
447         instance->data = data;
448 }
449
450 void *ast_rtp_instance_get_data(struct ast_rtp_instance *instance)
451 {
452         return instance->data;
453 }
454
455 int ast_rtp_instance_write(struct ast_rtp_instance *instance, struct ast_frame *frame)
456 {
457         return instance->engine->write(instance, frame);
458 }
459
460 struct ast_frame *ast_rtp_instance_read(struct ast_rtp_instance *instance, int rtcp)
461 {
462         return instance->engine->read(instance, rtcp);
463 }
464
465 int ast_rtp_instance_set_local_address(struct ast_rtp_instance *instance,
466                 const struct ast_sockaddr *address)
467 {
468         ast_sockaddr_copy(&instance->local_address, address);
469         return 0;
470 }
471
472 int ast_rtp_instance_set_incoming_source_address(struct ast_rtp_instance *instance,
473                                                  const struct ast_sockaddr *address)
474 {
475         ast_sockaddr_copy(&instance->incoming_source_address, address);
476
477         /* moo */
478
479         if (instance->engine->remote_address_set) {
480                 instance->engine->remote_address_set(instance, &instance->incoming_source_address);
481         }
482
483         return 0;
484 }
485
486 int ast_rtp_instance_set_requested_target_address(struct ast_rtp_instance *instance,
487                                                   const struct ast_sockaddr *address)
488 {
489         ast_sockaddr_copy(&instance->requested_target_address, address);
490
491         return ast_rtp_instance_set_incoming_source_address(instance, address);
492 }
493
494 int ast_rtp_instance_get_and_cmp_local_address(struct ast_rtp_instance *instance,
495                 struct ast_sockaddr *address)
496 {
497         if (ast_sockaddr_cmp(address, &instance->local_address) != 0) {
498                 ast_sockaddr_copy(address, &instance->local_address);
499                 return 1;
500         }
501
502         return 0;
503 }
504
505 void ast_rtp_instance_get_local_address(struct ast_rtp_instance *instance,
506                 struct ast_sockaddr *address)
507 {
508         ast_sockaddr_copy(address, &instance->local_address);
509 }
510
511 int ast_rtp_instance_get_and_cmp_requested_target_address(struct ast_rtp_instance *instance,
512                 struct ast_sockaddr *address)
513 {
514         if (ast_sockaddr_cmp(address, &instance->requested_target_address) != 0) {
515                 ast_sockaddr_copy(address, &instance->requested_target_address);
516                 return 1;
517         }
518
519         return 0;
520 }
521
522 void ast_rtp_instance_get_incoming_source_address(struct ast_rtp_instance *instance,
523                                                   struct ast_sockaddr *address)
524 {
525         ast_sockaddr_copy(address, &instance->incoming_source_address);
526 }
527
528 void ast_rtp_instance_get_requested_target_address(struct ast_rtp_instance *instance,
529                                                    struct ast_sockaddr *address)
530 {
531         ast_sockaddr_copy(address, &instance->requested_target_address);
532 }
533
534 void ast_rtp_instance_set_extended_prop(struct ast_rtp_instance *instance, int property, void *value)
535 {
536         if (instance->engine->extended_prop_set) {
537                 instance->engine->extended_prop_set(instance, property, value);
538         }
539 }
540
541 void *ast_rtp_instance_get_extended_prop(struct ast_rtp_instance *instance, int property)
542 {
543         if (instance->engine->extended_prop_get) {
544                 return instance->engine->extended_prop_get(instance, property);
545         }
546
547         return NULL;
548 }
549
550 void ast_rtp_instance_set_prop(struct ast_rtp_instance *instance, enum ast_rtp_property property, int value)
551 {
552         instance->properties[property] = value;
553
554         if (instance->engine->prop_set) {
555                 instance->engine->prop_set(instance, property, value);
556         }
557 }
558
559 int ast_rtp_instance_get_prop(struct ast_rtp_instance *instance, enum ast_rtp_property property)
560 {
561         return instance->properties[property];
562 }
563
564 struct ast_rtp_codecs *ast_rtp_instance_get_codecs(struct ast_rtp_instance *instance)
565 {
566         return &instance->codecs;
567 }
568
569 int ast_rtp_codecs_payloads_initialize(struct ast_rtp_codecs *codecs)
570 {
571         int res;
572
573         codecs->framing = 0;
574         ast_rwlock_init(&codecs->codecs_lock);
575         res = AST_VECTOR_INIT(&codecs->payloads, AST_RTP_MAX_PT);
576
577         return res;
578 }
579
580 void ast_rtp_codecs_payloads_destroy(struct ast_rtp_codecs *codecs)
581 {
582         int i;
583
584         for (i = 0; i < AST_VECTOR_SIZE(&codecs->payloads); i++) {
585                 struct ast_rtp_payload_type *type;
586
587                 type = AST_VECTOR_GET(&codecs->payloads, i);
588                 ao2_t_cleanup(type, "destroying ast_rtp_codec");
589         }
590         AST_VECTOR_FREE(&codecs->payloads);
591
592         ast_rwlock_destroy(&codecs->codecs_lock);
593 }
594
595 void ast_rtp_codecs_payloads_clear(struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance)
596 {
597         ast_rtp_codecs_payloads_destroy(codecs);
598
599         if (instance && instance->engine && instance->engine->payload_set) {
600                 int i;
601                 for (i = 0; i < AST_RTP_MAX_PT; i++) {
602                         instance->engine->payload_set(instance, i, 0, NULL, 0);
603                 }
604         }
605
606         ast_rtp_codecs_payloads_initialize(codecs);
607 }
608
609 void ast_rtp_codecs_payloads_copy(struct ast_rtp_codecs *src, struct ast_rtp_codecs *dest, struct ast_rtp_instance *instance)
610 {
611         int i;
612
613         ast_rwlock_rdlock(&src->codecs_lock);
614         ast_rwlock_wrlock(&dest->codecs_lock);
615
616         for (i = 0; i < AST_VECTOR_SIZE(&src->payloads); i++) {
617                 struct ast_rtp_payload_type *type;
618
619                 type = AST_VECTOR_GET(&src->payloads, i);
620                 if (!type) {
621                         continue;
622                 }
623                 if (i < AST_VECTOR_SIZE(&dest->payloads)) {
624                         ao2_t_cleanup(AST_VECTOR_GET(&dest->payloads, i), "cleaning up vector element about to be replaced");
625                 }
626                 ast_debug(2, "Copying payload %d (%p) from %p to %p\n", i, type, src, dest);
627                 ao2_bump(type);
628                 AST_VECTOR_INSERT(&dest->payloads, i, type);
629
630                 if (instance && instance->engine && instance->engine->payload_set) {
631                         instance->engine->payload_set(instance, i, type->asterisk_format, type->format, type->rtp_code);
632                 }
633         }
634         dest->framing = src->framing;
635         ast_rwlock_unlock(&dest->codecs_lock);
636         ast_rwlock_unlock(&src->codecs_lock);
637 }
638
639 void ast_rtp_codecs_payloads_set_m_type(struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance, int payload)
640 {
641         struct ast_rtp_payload_type *new_type;
642
643         new_type = ast_rtp_engine_alloc_payload_type();
644         if (!new_type) {
645                 return;
646         }
647
648         ast_rwlock_rdlock(&static_RTP_PT_lock);
649         if (payload < 0 || payload >= AST_RTP_MAX_PT) {
650                 ast_rwlock_unlock(&static_RTP_PT_lock);
651                 return;
652         }
653
654         ast_rwlock_wrlock(&codecs->codecs_lock);
655         if (payload < AST_VECTOR_SIZE(&codecs->payloads)) {
656                 ao2_t_cleanup(AST_VECTOR_GET(&codecs->payloads, payload), "cleaning up replaced payload type");
657         }
658
659         new_type->asterisk_format = static_RTP_PT[payload].asterisk_format;
660         new_type->rtp_code = static_RTP_PT[payload].rtp_code;
661         new_type->payload = payload;
662         new_type->format = ao2_bump(static_RTP_PT[payload].format);
663
664         ast_debug(1, "Setting payload %d (%p) based on m type on %p\n", payload, new_type, codecs);
665         AST_VECTOR_INSERT(&codecs->payloads, payload, new_type);
666
667         if (instance && instance->engine && instance->engine->payload_set) {
668                 instance->engine->payload_set(instance, payload, new_type->asterisk_format, new_type->format, new_type->rtp_code);
669         }
670
671         ast_rwlock_unlock(&codecs->codecs_lock);
672         ast_rwlock_unlock(&static_RTP_PT_lock);
673 }
674
675 int ast_rtp_codecs_payloads_set_rtpmap_type_rate(struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance, int pt,
676                                  char *mimetype, char *mimesubtype,
677                                  enum ast_rtp_options options,
678                                  unsigned int sample_rate)
679 {
680         unsigned int i;
681         int found = 0;
682
683         ast_rwlock_rdlock(&mime_types_lock);
684         if (pt < 0 || pt >= AST_RTP_MAX_PT) {
685                 ast_rwlock_unlock(&mime_types_lock);
686                 return -1; /* bogus payload type */
687         }
688
689         ast_rwlock_wrlock(&codecs->codecs_lock);
690         for (i = 0; i < mime_types_len; ++i) {
691                 const struct ast_rtp_mime_type *t = &ast_rtp_mime_types[i];
692                 struct ast_rtp_payload_type *new_type;
693
694                 if (strcasecmp(mimesubtype, t->subtype)) {
695                         continue;
696                 }
697
698                 if (strcasecmp(mimetype, t->type)) {
699                         continue;
700                 }
701
702                 /* if both sample rates have been supplied, and they don't match,
703                  * then this not a match; if one has not been supplied, then the
704                  * rates are not compared */
705                 if (sample_rate && t->sample_rate &&
706                     (sample_rate != t->sample_rate)) {
707                         continue;
708                 }
709
710                 found = 1;
711
712                 new_type = ast_rtp_engine_alloc_payload_type();
713                 if (!new_type) {
714                         continue;
715                 }
716
717                 if (pt < AST_VECTOR_SIZE(&codecs->payloads)) {
718                         ao2_t_cleanup(AST_VECTOR_GET(&codecs->payloads, pt), "cleaning up replaced payload type");
719                 }
720
721                 new_type->payload = pt;
722                 new_type->asterisk_format = t->payload_type.asterisk_format;
723                 new_type->rtp_code = t->payload_type.rtp_code;
724                 if ((ast_format_cmp(t->payload_type.format, ast_format_g726) == AST_FORMAT_CMP_EQUAL) &&
725                                 t->payload_type.asterisk_format && (options & AST_RTP_OPT_G726_NONSTANDARD)) {
726                         new_type->format = ao2_bump(ast_format_g726_aal2);
727                 } else {
728                         new_type->format = ao2_bump(t->payload_type.format);
729                 }
730                 AST_VECTOR_INSERT(&codecs->payloads, pt, new_type);
731
732                 if (instance && instance->engine && instance->engine->payload_set) {
733                         instance->engine->payload_set(instance, pt, new_type->asterisk_format, new_type->format, new_type->rtp_code);
734                 }
735
736                 break;
737         }
738         ast_rwlock_unlock(&codecs->codecs_lock);
739         ast_rwlock_unlock(&mime_types_lock);
740
741         return (found ? 0 : -2);
742 }
743
744 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)
745 {
746         return ast_rtp_codecs_payloads_set_rtpmap_type_rate(codecs, instance, payload, mimetype, mimesubtype, options, 0);
747 }
748
749 void ast_rtp_codecs_payloads_unset(struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance, int payload)
750 {
751         struct ast_rtp_payload_type *type;
752
753         if (payload < 0 || payload >= AST_RTP_MAX_PT) {
754                 return;
755         }
756
757         ast_debug(2, "Unsetting payload %d on %p\n", payload, codecs);
758
759         ast_rwlock_wrlock(&codecs->codecs_lock);
760         if (payload < AST_VECTOR_SIZE(&codecs->payloads)) {
761                 type = AST_VECTOR_GET(&codecs->payloads, payload);
762                 ao2_cleanup(type);
763                 AST_VECTOR_INSERT(&codecs->payloads, payload, NULL);
764         }
765
766         if (instance && instance->engine && instance->engine->payload_set) {
767                 instance->engine->payload_set(instance, payload, 0, NULL, 0);
768         }
769
770         ast_rwlock_unlock(&codecs->codecs_lock);
771 }
772
773 struct ast_rtp_payload_type *ast_rtp_codecs_get_payload(struct ast_rtp_codecs *codecs, int payload)
774 {
775         struct ast_rtp_payload_type *type = NULL;
776
777         if (payload < 0 || payload >= AST_RTP_MAX_PT) {
778                 return NULL;
779         }
780
781         ast_rwlock_rdlock(&codecs->codecs_lock);
782         if (payload < AST_VECTOR_SIZE(&codecs->payloads)) {
783                 type = AST_VECTOR_GET(&codecs->payloads, payload);
784                 ao2_bump(type);
785         }
786         ast_rwlock_unlock(&codecs->codecs_lock);
787
788         if (!type) {
789                 type = ast_rtp_engine_alloc_payload_type();
790                 if (!type) {
791                         return NULL;
792                 }
793                 ast_rwlock_rdlock(&static_RTP_PT_lock);
794                 type->asterisk_format = static_RTP_PT[payload].asterisk_format;
795                 type->rtp_code = static_RTP_PT[payload].rtp_code;
796                 type->payload = payload;
797                 type->format = ao2_bump(static_RTP_PT[payload].format);
798                 ast_rwlock_unlock(&static_RTP_PT_lock);
799         }
800
801         return type;
802 }
803
804 int ast_rtp_codecs_payload_replace_format(struct ast_rtp_codecs *codecs, int payload, struct ast_format *format)
805 {
806         struct ast_rtp_payload_type *type;
807
808         if (payload < 0 || payload >= AST_RTP_MAX_PT) {
809                 return -1;
810         }
811
812         ast_rwlock_wrlock(&codecs->codecs_lock);
813         if (payload < AST_VECTOR_SIZE(&codecs->payloads)) {
814                 type = AST_VECTOR_GET(&codecs->payloads, payload);
815                 if (type && type->asterisk_format) {
816                         ao2_replace(type->format, format);
817                 }
818         }
819         ast_rwlock_unlock(&codecs->codecs_lock);
820
821         return 0;
822 }
823
824 struct ast_format *ast_rtp_codecs_get_payload_format(struct ast_rtp_codecs *codecs, int payload)
825 {
826         struct ast_rtp_payload_type *type;
827         struct ast_format *format = NULL;
828
829         if (payload < 0 || payload >= AST_RTP_MAX_PT) {
830                 return NULL;
831         }
832
833         ast_rwlock_rdlock(&codecs->codecs_lock);
834         if (payload < AST_VECTOR_SIZE(&codecs->payloads)) {
835                 type = AST_VECTOR_GET(&codecs->payloads, payload);
836                 if (type && type->asterisk_format) {
837                         format = ao2_bump(type->format);
838                 }
839         }
840         ast_rwlock_unlock(&codecs->codecs_lock);
841
842         return format;
843 }
844
845 void ast_rtp_codecs_set_framing(struct ast_rtp_codecs *codecs, unsigned int framing)
846 {
847         if (!framing) {
848                 return;
849         }
850
851         ast_rwlock_wrlock(&codecs->codecs_lock);
852         codecs->framing = framing;
853         ast_rwlock_unlock(&codecs->codecs_lock);
854 }
855
856 unsigned int ast_rtp_codecs_get_framing(struct ast_rtp_codecs *codecs)
857 {
858         unsigned int framing;
859
860         ast_rwlock_rdlock(&codecs->codecs_lock);
861         framing = codecs->framing;
862         ast_rwlock_unlock(&codecs->codecs_lock);
863
864         return framing;
865 }
866
867 void ast_rtp_codecs_payload_formats(struct ast_rtp_codecs *codecs, struct ast_format_cap *astformats, int *nonastformats)
868 {
869         int i;
870
871         ast_format_cap_remove_by_type(astformats, AST_MEDIA_TYPE_UNKNOWN);
872         *nonastformats = 0;
873
874         ast_rwlock_rdlock(&codecs->codecs_lock);
875         for (i = 0; i < AST_VECTOR_SIZE(&codecs->payloads); i++) {
876                 struct ast_rtp_payload_type *type;
877
878                 type = AST_VECTOR_GET(&codecs->payloads, i);
879                 if (!type) {
880                         continue;
881                 }
882
883                 if (type->asterisk_format) {
884                         ast_format_cap_append(astformats, type->format, 0);
885                 } else {
886                         *nonastformats |= type->rtp_code;
887                 }
888         }
889
890         if (codecs->framing) {
891                 ast_format_cap_set_framing(astformats, codecs->framing);
892         }
893
894         ast_rwlock_unlock(&codecs->codecs_lock);
895 }
896
897 int ast_rtp_codecs_payload_code(struct ast_rtp_codecs *codecs, int asterisk_format, const struct ast_format *format, int code)
898 {
899         struct ast_rtp_payload_type *type;
900         int i;
901         int payload = -1;
902
903         ast_rwlock_rdlock(&codecs->codecs_lock);
904         for (i = 0; i < AST_VECTOR_SIZE(&codecs->payloads); i++) {
905                 type = AST_VECTOR_GET(&codecs->payloads, i);
906                 if (!type) {
907                         continue;
908                 }
909
910                 if ((asterisk_format && format && ast_format_cmp(format, type->format) == AST_FORMAT_CMP_EQUAL)
911                         || (!asterisk_format && type->rtp_code == code)) {
912                         payload = i;
913                         break;
914                 }
915         }
916         ast_rwlock_unlock(&codecs->codecs_lock);
917
918         if (payload < 0) {
919                 ast_rwlock_rdlock(&static_RTP_PT_lock);
920                 for (i = 0; i < AST_RTP_MAX_PT; i++) {
921                         if (static_RTP_PT[i].asterisk_format && asterisk_format && format &&
922                                 (ast_format_cmp(format, static_RTP_PT[i].format) != AST_FORMAT_CMP_NOT_EQUAL)) {
923                                 payload = i;
924                                 break;
925                         } else if (!static_RTP_PT[i].asterisk_format && !asterisk_format &&
926                                 (static_RTP_PT[i].rtp_code == code)) {
927                                 payload = i;
928                                 break;
929                         }
930                 }
931                 ast_rwlock_unlock(&static_RTP_PT_lock);
932         }
933
934         return payload;
935 }
936
937 int ast_rtp_codecs_find_payload_code(struct ast_rtp_codecs *codecs, int code)
938 {
939         struct ast_rtp_payload_type *type;
940         int res = -1;
941
942         ast_rwlock_rdlock(&codecs->codecs_lock);
943         if (code < AST_VECTOR_SIZE(&codecs->payloads)) {
944                 type = AST_VECTOR_GET(&codecs->payloads, code);
945                 if (type) {
946                         res = type->payload;
947                 }
948         }
949         ast_rwlock_unlock(&codecs->codecs_lock);
950
951         return res;
952 }
953
954 const char *ast_rtp_lookup_mime_subtype2(const int asterisk_format, struct ast_format *format, int code, enum ast_rtp_options options)
955 {
956         int i;
957         const char *res = "";
958
959         ast_rwlock_rdlock(&mime_types_lock);
960         for (i = 0; i < mime_types_len; i++) {
961                 if (ast_rtp_mime_types[i].payload_type.asterisk_format && asterisk_format && format &&
962                         (ast_format_cmp(format, ast_rtp_mime_types[i].payload_type.format) != AST_FORMAT_CMP_NOT_EQUAL)) {
963                         if ((ast_format_cmp(format, ast_format_g726_aal2) == AST_FORMAT_CMP_EQUAL) &&
964                                         (options & AST_RTP_OPT_G726_NONSTANDARD)) {
965                                 res = "G726-32";
966                                 break;
967                         } else {
968                                 res = ast_rtp_mime_types[i].subtype;
969                                 break;
970                         }
971                 } else if (!ast_rtp_mime_types[i].payload_type.asterisk_format && !asterisk_format &&
972                         ast_rtp_mime_types[i].payload_type.rtp_code == code) {
973
974                         res = ast_rtp_mime_types[i].subtype;
975                         break;
976                 }
977         }
978         ast_rwlock_unlock(&mime_types_lock);
979
980         return res;
981 }
982
983 unsigned int ast_rtp_lookup_sample_rate2(int asterisk_format, struct ast_format *format, int code)
984 {
985         unsigned int i;
986         unsigned int res = 0;
987
988         ast_rwlock_rdlock(&mime_types_lock);
989         for (i = 0; i < mime_types_len; ++i) {
990                 if (ast_rtp_mime_types[i].payload_type.asterisk_format && asterisk_format && format &&
991                         (ast_format_cmp(format, ast_rtp_mime_types[i].payload_type.format) != AST_FORMAT_CMP_NOT_EQUAL)) {
992                         res = ast_rtp_mime_types[i].sample_rate;
993                         break;
994                 } else if (!ast_rtp_mime_types[i].payload_type.asterisk_format && !asterisk_format &&
995                         ast_rtp_mime_types[i].payload_type.rtp_code == code) {
996                         res = ast_rtp_mime_types[i].sample_rate;
997                         break;
998                 }
999         }
1000         ast_rwlock_unlock(&mime_types_lock);
1001
1002         return res;
1003 }
1004
1005 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)
1006 {
1007         int found = 0;
1008         const char *name;
1009         if (!buf) {
1010                 return NULL;
1011         }
1012
1013
1014         if (asterisk_format) {
1015                 int x;
1016                 struct ast_format *tmp_fmt;
1017                 for (x = 0; x < ast_format_cap_count(ast_format_capability); x++) {
1018                         tmp_fmt = ast_format_cap_get_format(ast_format_capability, x);
1019                         name = ast_rtp_lookup_mime_subtype2(asterisk_format, tmp_fmt, 0, options);
1020                         ao2_ref(tmp_fmt, -1);
1021                         ast_str_append(&buf, 0, "%s|", name);
1022                         found = 1;
1023                 }
1024         } else {
1025                 int x;
1026                 ast_str_append(&buf, 0, "0x%x (", (unsigned int) rtp_capability);
1027                 for (x = 1; x <= AST_RTP_MAX; x <<= 1) {
1028                         if (rtp_capability & x) {
1029                                 name = ast_rtp_lookup_mime_subtype2(asterisk_format, NULL, x, options);
1030                                 ast_str_append(&buf, 0, "%s|", name);
1031                                 found = 1;
1032                         }
1033                 }
1034         }
1035
1036         ast_str_append(&buf, 0, "%s", found ? ")" : "nothing)");
1037
1038         return ast_str_buffer(buf);
1039 }
1040
1041 int ast_rtp_instance_dtmf_begin(struct ast_rtp_instance *instance, char digit)
1042 {
1043         return instance->engine->dtmf_begin ? instance->engine->dtmf_begin(instance, digit) : -1;
1044 }
1045
1046 int ast_rtp_instance_dtmf_end(struct ast_rtp_instance *instance, char digit)
1047 {
1048         return instance->engine->dtmf_end ? instance->engine->dtmf_end(instance, digit) : -1;
1049 }
1050 int ast_rtp_instance_dtmf_end_with_duration(struct ast_rtp_instance *instance, char digit, unsigned int duration)
1051 {
1052         return instance->engine->dtmf_end_with_duration ? instance->engine->dtmf_end_with_duration(instance, digit, duration) : -1;
1053 }
1054
1055 int ast_rtp_instance_dtmf_mode_set(struct ast_rtp_instance *instance, enum ast_rtp_dtmf_mode dtmf_mode)
1056 {
1057         return (!instance->engine->dtmf_mode_set || instance->engine->dtmf_mode_set(instance, dtmf_mode)) ? -1 : 0;
1058 }
1059
1060 enum ast_rtp_dtmf_mode ast_rtp_instance_dtmf_mode_get(struct ast_rtp_instance *instance)
1061 {
1062         return instance->engine->dtmf_mode_get ? instance->engine->dtmf_mode_get(instance) : 0;
1063 }
1064
1065 void ast_rtp_instance_update_source(struct ast_rtp_instance *instance)
1066 {
1067         if (instance->engine->update_source) {
1068                 instance->engine->update_source(instance);
1069         }
1070 }
1071
1072 void ast_rtp_instance_change_source(struct ast_rtp_instance *instance)
1073 {
1074         if (instance->engine->change_source) {
1075                 instance->engine->change_source(instance);
1076         }
1077 }
1078
1079 int ast_rtp_instance_set_qos(struct ast_rtp_instance *instance, int tos, int cos, const char *desc)
1080 {
1081         return instance->engine->qos ? instance->engine->qos(instance, tos, cos, desc) : -1;
1082 }
1083
1084 void ast_rtp_instance_stop(struct ast_rtp_instance *instance)
1085 {
1086         if (instance->engine->stop) {
1087                 instance->engine->stop(instance);
1088         }
1089 }
1090
1091 int ast_rtp_instance_fd(struct ast_rtp_instance *instance, int rtcp)
1092 {
1093         return instance->engine->fd ? instance->engine->fd(instance, rtcp) : -1;
1094 }
1095
1096 struct ast_rtp_glue *ast_rtp_instance_get_glue(const char *type)
1097 {
1098         struct ast_rtp_glue *glue = NULL;
1099
1100         AST_RWLIST_RDLOCK(&glues);
1101
1102         AST_RWLIST_TRAVERSE(&glues, glue, entry) {
1103                 if (!strcasecmp(glue->type, type)) {
1104                         break;
1105                 }
1106         }
1107
1108         AST_RWLIST_UNLOCK(&glues);
1109
1110         return glue;
1111 }
1112
1113 /*!
1114  * \brief Conditionally unref an rtp instance
1115  */
1116 static void unref_instance_cond(struct ast_rtp_instance **instance)
1117 {
1118         if (*instance) {
1119                 ao2_ref(*instance, -1);
1120                 *instance = NULL;
1121         }
1122 }
1123
1124 struct ast_rtp_instance *ast_rtp_instance_get_bridged(struct ast_rtp_instance *instance)
1125 {
1126         return instance->bridged;
1127 }
1128
1129 void ast_rtp_instance_set_bridged(struct ast_rtp_instance *instance, struct ast_rtp_instance *bridged)
1130 {
1131         instance->bridged = bridged;
1132 }
1133
1134 void ast_rtp_instance_early_bridge_make_compatible(struct ast_channel *c_dst, struct ast_channel *c_src)
1135 {
1136         struct ast_rtp_instance *instance_dst = NULL, *instance_src = NULL,
1137                 *vinstance_dst = NULL, *vinstance_src = NULL,
1138                 *tinstance_dst = NULL, *tinstance_src = NULL;
1139         struct ast_rtp_glue *glue_dst, *glue_src;
1140         enum ast_rtp_glue_result audio_glue_dst_res = AST_RTP_GLUE_RESULT_FORBID, video_glue_dst_res = AST_RTP_GLUE_RESULT_FORBID;
1141         enum ast_rtp_glue_result audio_glue_src_res = AST_RTP_GLUE_RESULT_FORBID, video_glue_src_res = AST_RTP_GLUE_RESULT_FORBID;
1142         struct ast_format_cap *cap_dst = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
1143         struct ast_format_cap *cap_src = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
1144
1145         /* Lock both channels so we can look for the glue that binds them together */
1146         ast_channel_lock_both(c_dst, c_src);
1147
1148         if (!cap_src || !cap_dst) {
1149                 goto done;
1150         }
1151
1152         /* Grab glue that binds each channel to something using the RTP engine */
1153         if (!(glue_dst = ast_rtp_instance_get_glue(ast_channel_tech(c_dst)->type)) || !(glue_src = ast_rtp_instance_get_glue(ast_channel_tech(c_src)->type))) {
1154                 ast_debug(1, "Can't find native functions for channel '%s'\n", glue_dst ? ast_channel_name(c_src) : ast_channel_name(c_dst));
1155                 goto done;
1156         }
1157
1158         audio_glue_dst_res = glue_dst->get_rtp_info(c_dst, &instance_dst);
1159         video_glue_dst_res = glue_dst->get_vrtp_info ? glue_dst->get_vrtp_info(c_dst, &vinstance_dst) : AST_RTP_GLUE_RESULT_FORBID;
1160
1161         audio_glue_src_res = glue_src->get_rtp_info(c_src, &instance_src);
1162         video_glue_src_res = glue_src->get_vrtp_info ? glue_src->get_vrtp_info(c_src, &vinstance_src) : AST_RTP_GLUE_RESULT_FORBID;
1163
1164         /* If we are carrying video, and both sides are not going to remotely bridge... fail the native bridge */
1165         if (video_glue_dst_res != AST_RTP_GLUE_RESULT_FORBID && (audio_glue_dst_res != AST_RTP_GLUE_RESULT_REMOTE || video_glue_dst_res != AST_RTP_GLUE_RESULT_REMOTE)) {
1166                 audio_glue_dst_res = AST_RTP_GLUE_RESULT_FORBID;
1167         }
1168         if (video_glue_src_res != AST_RTP_GLUE_RESULT_FORBID && (audio_glue_src_res != AST_RTP_GLUE_RESULT_REMOTE || video_glue_src_res != AST_RTP_GLUE_RESULT_REMOTE)) {
1169                 audio_glue_src_res = AST_RTP_GLUE_RESULT_FORBID;
1170         }
1171         if (audio_glue_dst_res == AST_RTP_GLUE_RESULT_REMOTE && (video_glue_dst_res == AST_RTP_GLUE_RESULT_FORBID || video_glue_dst_res == AST_RTP_GLUE_RESULT_REMOTE) && glue_dst->get_codec) {
1172                 glue_dst->get_codec(c_dst, cap_dst);
1173         }
1174         if (audio_glue_src_res == AST_RTP_GLUE_RESULT_REMOTE && (video_glue_src_res == AST_RTP_GLUE_RESULT_FORBID || video_glue_src_res == AST_RTP_GLUE_RESULT_REMOTE) && glue_src->get_codec) {
1175                 glue_src->get_codec(c_src, cap_src);
1176         }
1177
1178         /* If any sort of bridge is forbidden just completely bail out and go back to generic bridging */
1179         if (audio_glue_dst_res != AST_RTP_GLUE_RESULT_REMOTE || audio_glue_src_res != AST_RTP_GLUE_RESULT_REMOTE) {
1180                 goto done;
1181         }
1182
1183         /* Make sure we have matching codecs */
1184         if (!ast_format_cap_iscompatible(cap_dst, cap_src)) {
1185                 goto done;
1186         }
1187
1188         ast_rtp_codecs_payloads_copy(&instance_src->codecs, &instance_dst->codecs, instance_dst);
1189
1190         if (vinstance_dst && vinstance_src) {
1191                 ast_rtp_codecs_payloads_copy(&vinstance_src->codecs, &vinstance_dst->codecs, vinstance_dst);
1192         }
1193         if (tinstance_dst && tinstance_src) {
1194                 ast_rtp_codecs_payloads_copy(&tinstance_src->codecs, &tinstance_dst->codecs, tinstance_dst);
1195         }
1196
1197         if (glue_dst->update_peer(c_dst, instance_src, vinstance_src, tinstance_src, cap_src, 0)) {
1198                 ast_log(LOG_WARNING, "Channel '%s' failed to setup early bridge to '%s'\n",
1199                         ast_channel_name(c_dst), ast_channel_name(c_src));
1200         } else {
1201                 ast_debug(1, "Seeded SDP of '%s' with that of '%s'\n",
1202                         ast_channel_name(c_dst), ast_channel_name(c_src));
1203         }
1204
1205 done:
1206         ast_channel_unlock(c_dst);
1207         ast_channel_unlock(c_src);
1208
1209         ao2_cleanup(cap_dst);
1210         ao2_cleanup(cap_src);
1211
1212         unref_instance_cond(&instance_dst);
1213         unref_instance_cond(&instance_src);
1214         unref_instance_cond(&vinstance_dst);
1215         unref_instance_cond(&vinstance_src);
1216         unref_instance_cond(&tinstance_dst);
1217         unref_instance_cond(&tinstance_src);
1218 }
1219
1220 int ast_rtp_instance_early_bridge(struct ast_channel *c0, struct ast_channel *c1)
1221 {
1222         struct ast_rtp_instance *instance0 = NULL, *instance1 = NULL,
1223                         *vinstance0 = NULL, *vinstance1 = NULL,
1224                         *tinstance0 = NULL, *tinstance1 = NULL;
1225         struct ast_rtp_glue *glue0, *glue1;
1226         enum ast_rtp_glue_result audio_glue0_res = AST_RTP_GLUE_RESULT_FORBID, video_glue0_res = AST_RTP_GLUE_RESULT_FORBID;
1227         enum ast_rtp_glue_result audio_glue1_res = AST_RTP_GLUE_RESULT_FORBID, video_glue1_res = AST_RTP_GLUE_RESULT_FORBID;
1228         struct ast_format_cap *cap0 = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
1229         struct ast_format_cap *cap1 = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
1230
1231         /* If there is no second channel just immediately bail out, we are of no use in that scenario */
1232         if (!c1 || !cap1 || !cap0) {
1233                 ao2_cleanup(cap0);
1234                 ao2_cleanup(cap1);
1235                 return -1;
1236         }
1237
1238         /* Lock both channels so we can look for the glue that binds them together */
1239         ast_channel_lock_both(c0, c1);
1240
1241         /* Grab glue that binds each channel to something using the RTP engine */
1242         if (!(glue0 = ast_rtp_instance_get_glue(ast_channel_tech(c0)->type)) || !(glue1 = ast_rtp_instance_get_glue(ast_channel_tech(c1)->type))) {
1243                 ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", glue0 ? ast_channel_name(c1) : ast_channel_name(c0));
1244                 goto done;
1245         }
1246
1247         audio_glue0_res = glue0->get_rtp_info(c0, &instance0);
1248         video_glue0_res = glue0->get_vrtp_info ? glue0->get_vrtp_info(c0, &vinstance0) : AST_RTP_GLUE_RESULT_FORBID;
1249
1250         audio_glue1_res = glue1->get_rtp_info(c1, &instance1);
1251         video_glue1_res = glue1->get_vrtp_info ? glue1->get_vrtp_info(c1, &vinstance1) : AST_RTP_GLUE_RESULT_FORBID;
1252
1253         /* If we are carrying video, and both sides are not going to remotely bridge... fail the native bridge */
1254         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)) {
1255                 audio_glue0_res = AST_RTP_GLUE_RESULT_FORBID;
1256         }
1257         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)) {
1258                 audio_glue1_res = AST_RTP_GLUE_RESULT_FORBID;
1259         }
1260         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) {
1261                 glue0->get_codec(c0, cap0);
1262         }
1263         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) {
1264                 glue1->get_codec(c1, cap1);
1265         }
1266
1267         /* If any sort of bridge is forbidden just completely bail out and go back to generic bridging */
1268         if (audio_glue0_res != AST_RTP_GLUE_RESULT_REMOTE || audio_glue1_res != AST_RTP_GLUE_RESULT_REMOTE) {
1269                 goto done;
1270         }
1271
1272         /* Make sure we have matching codecs */
1273         if (!ast_format_cap_iscompatible(cap0, cap1)) {
1274                 goto done;
1275         }
1276
1277         /* Bridge media early */
1278         if (glue0->update_peer(c0, instance1, vinstance1, tinstance1, cap1, 0)) {
1279                 ast_log(LOG_WARNING, "Channel '%s' failed to setup early bridge to '%s'\n", ast_channel_name(c0), c1 ? ast_channel_name(c1) : "<unspecified>");
1280         }
1281
1282 done:
1283         ast_channel_unlock(c0);
1284         ast_channel_unlock(c1);
1285
1286         ao2_cleanup(cap0);
1287         ao2_cleanup(cap1);
1288
1289         unref_instance_cond(&instance0);
1290         unref_instance_cond(&instance1);
1291         unref_instance_cond(&vinstance0);
1292         unref_instance_cond(&vinstance1);
1293         unref_instance_cond(&tinstance0);
1294         unref_instance_cond(&tinstance1);
1295
1296         ast_debug(1, "Setting early bridge SDP of '%s' with that of '%s'\n", ast_channel_name(c0), c1 ? ast_channel_name(c1) : "<unspecified>");
1297
1298         return 0;
1299 }
1300
1301 int ast_rtp_red_init(struct ast_rtp_instance *instance, int buffer_time, int *payloads, int generations)
1302 {
1303         return instance->engine->red_init ? instance->engine->red_init(instance, buffer_time, payloads, generations) : -1;
1304 }
1305
1306 int ast_rtp_red_buffer(struct ast_rtp_instance *instance, struct ast_frame *frame)
1307 {
1308         return instance->engine->red_buffer ? instance->engine->red_buffer(instance, frame) : -1;
1309 }
1310
1311 int ast_rtp_instance_get_stats(struct ast_rtp_instance *instance, struct ast_rtp_instance_stats *stats, enum ast_rtp_instance_stat stat)
1312 {
1313         return instance->engine->get_stat ? instance->engine->get_stat(instance, stats, stat) : -1;
1314 }
1315
1316 char *ast_rtp_instance_get_quality(struct ast_rtp_instance *instance, enum ast_rtp_instance_stat_field field, char *buf, size_t size)
1317 {
1318         struct ast_rtp_instance_stats stats = { 0, };
1319         enum ast_rtp_instance_stat stat;
1320
1321         /* Determine what statistics we will need to retrieve based on field passed in */
1322         if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY) {
1323                 stat = AST_RTP_INSTANCE_STAT_ALL;
1324         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_JITTER) {
1325                 stat = AST_RTP_INSTANCE_STAT_COMBINED_JITTER;
1326         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_LOSS) {
1327                 stat = AST_RTP_INSTANCE_STAT_COMBINED_LOSS;
1328         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_RTT) {
1329                 stat = AST_RTP_INSTANCE_STAT_COMBINED_RTT;
1330         } else {
1331                 return NULL;
1332         }
1333
1334         /* Attempt to actually retrieve the statistics we need to generate the quality string */
1335         if (ast_rtp_instance_get_stats(instance, &stats, stat)) {
1336                 return NULL;
1337         }
1338
1339         /* Now actually fill the buffer with the good information */
1340         if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY) {
1341                 snprintf(buf, size, "ssrc=%u;themssrc=%u;lp=%u;rxjitter=%f;rxcount=%u;txjitter=%f;txcount=%u;rlp=%u;rtt=%f",
1342                          stats.local_ssrc, stats.remote_ssrc, stats.rxploss, stats.rxjitter, stats.rxcount, stats.txjitter, stats.txcount, stats.txploss, stats.rtt);
1343         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_JITTER) {
1344                 snprintf(buf, size, "minrxjitter=%f;maxrxjitter=%f;avgrxjitter=%f;stdevrxjitter=%f;reported_minjitter=%f;reported_maxjitter=%f;reported_avgjitter=%f;reported_stdevjitter=%f;",
1345                          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));
1346         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_LOSS) {
1347                 snprintf(buf, size, "minrxlost=%f;maxrxlost=%f;avgrxlost=%f;stdevrxlost=%f;reported_minlost=%f;reported_maxlost=%f;reported_avglost=%f;reported_stdevlost=%f;",
1348                          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));
1349         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_RTT) {
1350                 snprintf(buf, size, "minrtt=%f;maxrtt=%f;avgrtt=%f;stdevrtt=%f;", stats.minrtt, stats.maxrtt, stats.normdevrtt, stats.stdevrtt);
1351         }
1352
1353         return buf;
1354 }
1355
1356 void ast_rtp_instance_set_stats_vars(struct ast_channel *chan, struct ast_rtp_instance *instance)
1357 {
1358         char quality_buf[AST_MAX_USER_FIELD];
1359         char *quality;
1360         struct ast_channel *bridge = ast_channel_bridge_peer(chan);
1361
1362         ast_channel_lock(chan);
1363         ast_channel_stage_snapshot(chan);
1364         ast_channel_unlock(chan);
1365         if (bridge) {
1366                 ast_channel_lock(bridge);
1367                 ast_channel_stage_snapshot(bridge);
1368                 ast_channel_unlock(bridge);
1369         }
1370
1371         quality = ast_rtp_instance_get_quality(instance, AST_RTP_INSTANCE_STAT_FIELD_QUALITY,
1372                 quality_buf, sizeof(quality_buf));
1373         if (quality) {
1374                 pbx_builtin_setvar_helper(chan, "RTPAUDIOQOS", quality);
1375                 if (bridge) {
1376                         pbx_builtin_setvar_helper(bridge, "RTPAUDIOQOSBRIDGED", quality);
1377                 }
1378         }
1379
1380         quality = ast_rtp_instance_get_quality(instance,
1381                 AST_RTP_INSTANCE_STAT_FIELD_QUALITY_JITTER, quality_buf, sizeof(quality_buf));
1382         if (quality) {
1383                 pbx_builtin_setvar_helper(chan, "RTPAUDIOQOSJITTER", quality);
1384                 if (bridge) {
1385                         pbx_builtin_setvar_helper(bridge, "RTPAUDIOQOSJITTERBRIDGED", quality);
1386                 }
1387         }
1388
1389         quality = ast_rtp_instance_get_quality(instance,
1390                 AST_RTP_INSTANCE_STAT_FIELD_QUALITY_LOSS, quality_buf, sizeof(quality_buf));
1391         if (quality) {
1392                 pbx_builtin_setvar_helper(chan, "RTPAUDIOQOSLOSS", quality);
1393                 if (bridge) {
1394                         pbx_builtin_setvar_helper(bridge, "RTPAUDIOQOSLOSSBRIDGED", quality);
1395                 }
1396         }
1397
1398         quality = ast_rtp_instance_get_quality(instance,
1399                 AST_RTP_INSTANCE_STAT_FIELD_QUALITY_RTT, quality_buf, sizeof(quality_buf));
1400         if (quality) {
1401                 pbx_builtin_setvar_helper(chan, "RTPAUDIOQOSRTT", quality);
1402                 if (bridge) {
1403                         pbx_builtin_setvar_helper(bridge, "RTPAUDIOQOSRTTBRIDGED", quality);
1404                 }
1405         }
1406
1407         ast_channel_lock(chan);
1408         ast_channel_stage_snapshot_done(chan);
1409         ast_channel_unlock(chan);
1410         if (bridge) {
1411                 ast_channel_lock(bridge);
1412                 ast_channel_stage_snapshot_done(bridge);
1413                 ast_channel_unlock(bridge);
1414                 ast_channel_unref(bridge);
1415         }
1416 }
1417
1418 int ast_rtp_instance_set_read_format(struct ast_rtp_instance *instance, struct ast_format *format)
1419 {
1420         return instance->engine->set_read_format ? instance->engine->set_read_format(instance, format) : -1;
1421 }
1422
1423 int ast_rtp_instance_set_write_format(struct ast_rtp_instance *instance, struct ast_format *format)
1424 {
1425         return instance->engine->set_write_format ? instance->engine->set_write_format(instance, format) : -1;
1426 }
1427
1428 int ast_rtp_instance_make_compatible(struct ast_channel *chan, struct ast_rtp_instance *instance, struct ast_channel *peer)
1429 {
1430         struct ast_rtp_glue *glue;
1431         struct ast_rtp_instance *peer_instance = NULL;
1432         int res = -1;
1433
1434         if (!instance->engine->make_compatible) {
1435                 return -1;
1436         }
1437
1438         ast_channel_lock(peer);
1439
1440         if (!(glue = ast_rtp_instance_get_glue(ast_channel_tech(peer)->type))) {
1441                 ast_channel_unlock(peer);
1442                 return -1;
1443         }
1444
1445         glue->get_rtp_info(peer, &peer_instance);
1446         if (!peer_instance) {
1447                 ast_log(LOG_ERROR, "Unable to get_rtp_info for peer type %s\n", glue->type);
1448                 ast_channel_unlock(peer);
1449                 return -1;
1450         }
1451         if (peer_instance->engine != instance->engine) {
1452                 ast_log(LOG_ERROR, "Peer engine mismatch for type %s\n", glue->type);
1453                 ast_channel_unlock(peer);
1454                 ao2_ref(peer_instance, -1);
1455                 return -1;
1456         }
1457
1458         res = instance->engine->make_compatible(chan, instance, peer, peer_instance);
1459
1460         ast_channel_unlock(peer);
1461
1462         ao2_ref(peer_instance, -1);
1463         peer_instance = NULL;
1464
1465         return res;
1466 }
1467
1468 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)
1469 {
1470         if (instance->engine->available_formats) {
1471                 instance->engine->available_formats(instance, to_endpoint, to_asterisk, result);
1472                 if (ast_format_cap_count(result)) {
1473                         return;
1474                 }
1475         }
1476
1477         ast_translate_available_formats(to_endpoint, to_asterisk, result);
1478 }
1479
1480 int ast_rtp_instance_activate(struct ast_rtp_instance *instance)
1481 {
1482         return instance->engine->activate ? instance->engine->activate(instance) : 0;
1483 }
1484
1485 void ast_rtp_instance_stun_request(struct ast_rtp_instance *instance,
1486                                    struct ast_sockaddr *suggestion,
1487                                    const char *username)
1488 {
1489         if (instance->engine->stun_request) {
1490                 instance->engine->stun_request(instance, suggestion, username);
1491         }
1492 }
1493
1494 void ast_rtp_instance_set_timeout(struct ast_rtp_instance *instance, int timeout)
1495 {
1496         instance->timeout = timeout;
1497 }
1498
1499 void ast_rtp_instance_set_hold_timeout(struct ast_rtp_instance *instance, int timeout)
1500 {
1501         instance->holdtimeout = timeout;
1502 }
1503
1504 void ast_rtp_instance_set_keepalive(struct ast_rtp_instance *instance, int interval)
1505 {
1506         instance->keepalive = interval;
1507 }
1508
1509 int ast_rtp_instance_get_timeout(struct ast_rtp_instance *instance)
1510 {
1511         return instance->timeout;
1512 }
1513
1514 int ast_rtp_instance_get_hold_timeout(struct ast_rtp_instance *instance)
1515 {
1516         return instance->holdtimeout;
1517 }
1518
1519 int ast_rtp_instance_get_keepalive(struct ast_rtp_instance *instance)
1520 {
1521         return instance->keepalive;
1522 }
1523
1524 struct ast_rtp_engine *ast_rtp_instance_get_engine(struct ast_rtp_instance *instance)
1525 {
1526         return instance->engine;
1527 }
1528
1529 struct ast_rtp_glue *ast_rtp_instance_get_active_glue(struct ast_rtp_instance *instance)
1530 {
1531         return instance->glue;
1532 }
1533
1534 int ast_rtp_engine_register_srtp(struct ast_srtp_res *srtp_res, struct ast_srtp_policy_res *policy_res)
1535 {
1536         if (res_srtp || res_srtp_policy) {
1537                 return -1;
1538         }
1539         if (!srtp_res || !policy_res) {
1540                 return -1;
1541         }
1542
1543         res_srtp = srtp_res;
1544         res_srtp_policy = policy_res;
1545
1546         return 0;
1547 }
1548
1549 void ast_rtp_engine_unregister_srtp(void)
1550 {
1551         res_srtp = NULL;
1552         res_srtp_policy = NULL;
1553 }
1554
1555 int ast_rtp_engine_srtp_is_registered(void)
1556 {
1557         return res_srtp && res_srtp_policy;
1558 }
1559
1560 int ast_rtp_instance_add_srtp_policy(struct ast_rtp_instance *instance, struct ast_srtp_policy *remote_policy, struct ast_srtp_policy *local_policy)
1561 {
1562         int res = 0;
1563
1564         if (!res_srtp) {
1565                 return -1;
1566         }
1567
1568         if (!instance->srtp) {
1569                 res = res_srtp->create(&instance->srtp, instance, remote_policy);
1570         } else {
1571                 res = res_srtp->replace(&instance->srtp, instance, remote_policy);
1572         }
1573         if (!res) {
1574                 res = res_srtp->add_stream(instance->srtp, local_policy);
1575         }
1576
1577         return res;
1578 }
1579
1580 struct ast_srtp *ast_rtp_instance_get_srtp(struct ast_rtp_instance *instance)
1581 {
1582         return instance->srtp;
1583 }
1584
1585 int ast_rtp_instance_sendcng(struct ast_rtp_instance *instance, int level)
1586 {
1587         if (instance->engine->sendcng) {
1588                 return instance->engine->sendcng(instance, level);
1589         }
1590
1591         return -1;
1592 }
1593
1594 struct ast_rtp_engine_ice *ast_rtp_instance_get_ice(struct ast_rtp_instance *instance)
1595 {
1596         return instance->engine->ice;
1597 }
1598
1599 struct ast_rtp_engine_dtls *ast_rtp_instance_get_dtls(struct ast_rtp_instance *instance)
1600 {
1601         return instance->engine->dtls;
1602 }
1603
1604 int ast_rtp_dtls_cfg_parse(struct ast_rtp_dtls_cfg *dtls_cfg, const char *name, const char *value)
1605 {
1606         if (!strcasecmp(name, "dtlsenable")) {
1607                 dtls_cfg->enabled = ast_true(value) ? 1 : 0;
1608         } else if (!strcasecmp(name, "dtlsverify")) {
1609                 if (!strcasecmp(value, "yes")) {
1610                         dtls_cfg->verify = AST_RTP_DTLS_VERIFY_FINGERPRINT | AST_RTP_DTLS_VERIFY_CERTIFICATE;
1611                 } else if (!strcasecmp(value, "fingerprint")) {
1612                         dtls_cfg->verify = AST_RTP_DTLS_VERIFY_FINGERPRINT;
1613                 } else if (!strcasecmp(value, "certificate")) {
1614                         dtls_cfg->verify = AST_RTP_DTLS_VERIFY_CERTIFICATE;
1615                 } else if (!strcasecmp(value, "no")) {
1616                         dtls_cfg->verify = AST_RTP_DTLS_VERIFY_NONE;
1617                 } else {
1618                         return -1;
1619                 }
1620         } else if (!strcasecmp(name, "dtlsrekey")) {
1621                 if (sscanf(value, "%30u", &dtls_cfg->rekey) != 1) {
1622                         return -1;
1623                 }
1624         } else if (!strcasecmp(name, "dtlscertfile")) {
1625                 ast_free(dtls_cfg->certfile);
1626                 dtls_cfg->certfile = ast_strdup(value);
1627         } else if (!strcasecmp(name, "dtlsprivatekey")) {
1628                 ast_free(dtls_cfg->pvtfile);
1629                 dtls_cfg->pvtfile = ast_strdup(value);
1630         } else if (!strcasecmp(name, "dtlscipher")) {
1631                 ast_free(dtls_cfg->cipher);
1632                 dtls_cfg->cipher = ast_strdup(value);
1633         } else if (!strcasecmp(name, "dtlscafile")) {
1634                 ast_free(dtls_cfg->cafile);
1635                 dtls_cfg->cafile = ast_strdup(value);
1636         } else if (!strcasecmp(name, "dtlscapath") || !strcasecmp(name, "dtlscadir")) {
1637                 ast_free(dtls_cfg->capath);
1638                 dtls_cfg->capath = ast_strdup(value);
1639         } else if (!strcasecmp(name, "dtlssetup")) {
1640                 if (!strcasecmp(value, "active")) {
1641                         dtls_cfg->default_setup = AST_RTP_DTLS_SETUP_ACTIVE;
1642                 } else if (!strcasecmp(value, "passive")) {
1643                         dtls_cfg->default_setup = AST_RTP_DTLS_SETUP_PASSIVE;
1644                 } else if (!strcasecmp(value, "actpass")) {
1645                         dtls_cfg->default_setup = AST_RTP_DTLS_SETUP_ACTPASS;
1646                 }
1647         } else if (!strcasecmp(name, "dtlsfingerprint")) {
1648                 if (!strcasecmp(value, "sha-256")) {
1649                         dtls_cfg->hash = AST_RTP_DTLS_HASH_SHA256;
1650                 } else if (!strcasecmp(value, "sha-1")) {
1651                         dtls_cfg->hash = AST_RTP_DTLS_HASH_SHA1;
1652                 }
1653         } else {
1654                 return -1;
1655         }
1656
1657         return 0;
1658 }
1659
1660 void ast_rtp_dtls_cfg_copy(const struct ast_rtp_dtls_cfg *src_cfg, struct ast_rtp_dtls_cfg *dst_cfg)
1661 {
1662         dst_cfg->enabled = src_cfg->enabled;
1663         dst_cfg->verify = src_cfg->verify;
1664         dst_cfg->rekey = src_cfg->rekey;
1665         dst_cfg->suite = src_cfg->suite;
1666         dst_cfg->hash = src_cfg->hash;
1667         dst_cfg->certfile = ast_strdup(src_cfg->certfile);
1668         dst_cfg->pvtfile = ast_strdup(src_cfg->pvtfile);
1669         dst_cfg->cipher = ast_strdup(src_cfg->cipher);
1670         dst_cfg->cafile = ast_strdup(src_cfg->cafile);
1671         dst_cfg->capath = ast_strdup(src_cfg->capath);
1672         dst_cfg->default_setup = src_cfg->default_setup;
1673 }
1674
1675 void ast_rtp_dtls_cfg_free(struct ast_rtp_dtls_cfg *dtls_cfg)
1676 {
1677         ast_free(dtls_cfg->certfile);
1678         ast_free(dtls_cfg->pvtfile);
1679         ast_free(dtls_cfg->cipher);
1680         ast_free(dtls_cfg->cafile);
1681         ast_free(dtls_cfg->capath);
1682 }
1683
1684 /*! \internal
1685  * \brief Small helper routine that cleans up entry i in
1686  * \c static_RTP_PT.
1687  */
1688 static void rtp_engine_static_RTP_PT_cleanup(int i)
1689 {
1690         ao2_cleanup(static_RTP_PT[i].format);
1691         memset(&static_RTP_PT[i], 0, sizeof(struct ast_rtp_payload_type));
1692 }
1693
1694 /*! \internal
1695  * \brief Small helper routine that cleans up entry i in
1696  * \c ast_rtp_mime_types.
1697  */
1698 static void rtp_engine_mime_type_cleanup(int i)
1699 {
1700         ao2_cleanup(ast_rtp_mime_types[i].payload_type.format);
1701         memset(&ast_rtp_mime_types[i], 0, sizeof(struct ast_rtp_mime_type));
1702 }
1703
1704 static void set_next_mime_type(struct ast_format *format, int rtp_code, const char *type, const char *subtype, unsigned int sample_rate)
1705 {
1706         int x = mime_types_len;
1707         if (ARRAY_LEN(ast_rtp_mime_types) == mime_types_len) {
1708                 return;
1709         }
1710
1711         ast_rwlock_wrlock(&mime_types_lock);
1712         /* Make sure any previous value in ast_rtp_mime_types is cleaned up */
1713         memset(&ast_rtp_mime_types[x], 0, sizeof(struct ast_rtp_mime_type));    
1714         if (format) {
1715                 ast_rtp_mime_types[x].payload_type.asterisk_format = 1;
1716                 ast_rtp_mime_types[x].payload_type.format = ao2_bump(format);
1717         } else {
1718                 ast_rtp_mime_types[x].payload_type.rtp_code = rtp_code;
1719         }
1720         ast_copy_string(ast_rtp_mime_types[x].type, type, sizeof(ast_rtp_mime_types[x].type));
1721         ast_copy_string(ast_rtp_mime_types[x].subtype, subtype, sizeof(ast_rtp_mime_types[x].subtype));
1722         ast_rtp_mime_types[x].sample_rate = sample_rate;
1723         mime_types_len++;
1724         ast_rwlock_unlock(&mime_types_lock);
1725 }
1726
1727 static void add_static_payload(int map, struct ast_format *format, int rtp_code)
1728 {
1729         int x;
1730         ast_rwlock_wrlock(&static_RTP_PT_lock);
1731         if (map < 0) {
1732                 /* find next available dynamic payload slot */
1733                 for (x = 96; x < 127; x++) {
1734                         if (!static_RTP_PT[x].asterisk_format && !static_RTP_PT[x].rtp_code) {
1735                                 map = x;
1736                                 break;
1737                         }
1738                 }
1739         }
1740
1741         if (map < 0) {
1742                 ast_log(LOG_WARNING, "No Dynamic RTP mapping available for format %s\n",
1743                         ast_format_get_name(format));
1744                 ast_rwlock_unlock(&static_RTP_PT_lock);
1745                 return;
1746         }
1747
1748         if (format) {
1749                 static_RTP_PT[map].asterisk_format = 1;
1750                 static_RTP_PT[map].format = ao2_bump(format);
1751         } else {
1752                 static_RTP_PT[map].rtp_code = rtp_code;
1753         }
1754         ast_rwlock_unlock(&static_RTP_PT_lock);
1755 }
1756
1757 int ast_rtp_engine_load_format(struct ast_format *format)
1758 {
1759         char *codec_name = ast_strdupa(ast_format_get_name(format));
1760
1761         codec_name = ast_str_to_upper(codec_name);
1762
1763         set_next_mime_type(format,
1764                 0,
1765                 ast_codec_media_type2str(ast_format_get_type(format)),
1766                 codec_name,
1767                 ast_format_get_sample_rate(format));
1768         add_static_payload(-1, format, 0);
1769
1770         return 0;
1771 }
1772
1773 int ast_rtp_engine_unload_format(struct ast_format *format)
1774 {
1775         int x;
1776         int y = 0;
1777
1778         ast_rwlock_wrlock(&static_RTP_PT_lock);
1779         /* remove everything pertaining to this format id from the lists */
1780         for (x = 0; x < AST_RTP_MAX_PT; x++) {
1781                 if (ast_format_cmp(static_RTP_PT[x].format, format) == AST_FORMAT_CMP_EQUAL) {
1782                         rtp_engine_static_RTP_PT_cleanup(x);
1783                 }
1784         }
1785         ast_rwlock_unlock(&static_RTP_PT_lock);
1786
1787         ast_rwlock_wrlock(&mime_types_lock);
1788         /* rebuild the list skipping the items matching this id */
1789         for (x = 0; x < mime_types_len; x++) {
1790                 if (ast_format_cmp(ast_rtp_mime_types[x].payload_type.format, format) == AST_FORMAT_CMP_EQUAL) {
1791                         rtp_engine_mime_type_cleanup(x);
1792                         continue;
1793                 }
1794                 ast_rtp_mime_types[y] = ast_rtp_mime_types[x];
1795                 y++;
1796         }
1797         mime_types_len = y;
1798         ast_rwlock_unlock(&mime_types_lock);
1799         return 0;
1800 }
1801
1802 /*!
1803  * \internal
1804  * \brief \ref stasis message payload for RTCP messages
1805  */
1806 struct rtcp_message_payload {
1807         struct ast_channel_snapshot *snapshot;  /*< The channel snapshot, if available */
1808         struct ast_rtp_rtcp_report *report;     /*< The RTCP report */
1809         struct ast_json *blob;                  /*< Extra JSON data to publish */
1810 };
1811
1812 static void rtcp_message_payload_dtor(void *obj)
1813 {
1814         struct rtcp_message_payload *payload = obj;
1815
1816         ao2_cleanup(payload->report);
1817         ao2_cleanup(payload->snapshot);
1818         ast_json_unref(payload->blob);
1819 }
1820
1821 static struct ast_manager_event_blob *rtcp_report_to_ami(struct stasis_message *msg)
1822 {
1823         struct rtcp_message_payload *payload = stasis_message_data(msg);
1824         RAII_VAR(struct ast_str *, channel_string, NULL, ast_free);
1825         RAII_VAR(struct ast_str *, packet_string, ast_str_create(512), ast_free);
1826         unsigned int ssrc = payload->report->ssrc;
1827         unsigned int type = payload->report->type;
1828         unsigned int report_count = payload->report->reception_report_count;
1829         int i;
1830
1831         if (!packet_string) {
1832                 return NULL;
1833         }
1834
1835         if (payload->snapshot) {
1836                 channel_string = ast_manager_build_channel_state_string(payload->snapshot);
1837                 if (!channel_string) {
1838                         return NULL;
1839                 }
1840         }
1841
1842         if (payload->blob) {
1843                 /* Optional data */
1844                 struct ast_json *to = ast_json_object_get(payload->blob, "to");
1845                 struct ast_json *from = ast_json_object_get(payload->blob, "from");
1846                 struct ast_json *rtt = ast_json_object_get(payload->blob, "rtt");
1847                 if (to) {
1848                         ast_str_append(&packet_string, 0, "To: %s\r\n", ast_json_string_get(to));
1849                 }
1850                 if (from) {
1851                         ast_str_append(&packet_string, 0, "From: %s\r\n", ast_json_string_get(from));
1852                 }
1853                 if (rtt) {
1854                         ast_str_append(&packet_string, 0, "RTT: %4.4f\r\n", ast_json_real_get(rtt));
1855                 }
1856         }
1857
1858         ast_str_append(&packet_string, 0, "SSRC: 0x%.8x\r\n", ssrc);
1859         ast_str_append(&packet_string, 0, "PT: %u(%s)\r\n", type, type== AST_RTP_RTCP_SR ? "SR" : "RR");
1860         ast_str_append(&packet_string, 0, "ReportCount: %u\r\n", report_count);
1861         if (type == AST_RTP_RTCP_SR) {
1862                 ast_str_append(&packet_string, 0, "SentNTP: %lu.%06lu\r\n",
1863                         (unsigned long)payload->report->sender_information.ntp_timestamp.tv_sec,
1864                         (unsigned long)payload->report->sender_information.ntp_timestamp.tv_usec * 4096);
1865                 ast_str_append(&packet_string, 0, "SentRTP: %u\r\n",
1866                                 payload->report->sender_information.rtp_timestamp);
1867                 ast_str_append(&packet_string, 0, "SentPackets: %u\r\n",
1868                                 payload->report->sender_information.packet_count);
1869                 ast_str_append(&packet_string, 0, "SentOctets: %u\r\n",
1870                                 payload->report->sender_information.octet_count);
1871         }
1872
1873         for (i = 0; i < report_count; i++) {
1874                 RAII_VAR(struct ast_str *, report_string, NULL, ast_free);
1875
1876                 if (!payload->report->report_block[i]) {
1877                         break;
1878                 }
1879
1880                 report_string = ast_str_create(256);
1881                 if (!report_string) {
1882                         return NULL;
1883                 }
1884
1885                 ast_str_append(&report_string, 0, "Report%dSourceSSRC: 0x%.8x\r\n",
1886                                 i, payload->report->report_block[i]->source_ssrc);
1887                 ast_str_append(&report_string, 0, "Report%dFractionLost: %d\r\n",
1888                                 i, payload->report->report_block[i]->lost_count.fraction);
1889                 ast_str_append(&report_string, 0, "Report%dCumulativeLost: %u\r\n",
1890                                 i, payload->report->report_block[i]->lost_count.packets);
1891                 ast_str_append(&report_string, 0, "Report%dHighestSequence: %u\r\n",
1892                                 i, payload->report->report_block[i]->highest_seq_no & 0xffff);
1893                 ast_str_append(&report_string, 0, "Report%dSequenceNumberCycles: %u\r\n",
1894                                 i, payload->report->report_block[i]->highest_seq_no >> 16);
1895                 ast_str_append(&report_string, 0, "Report%dIAJitter: %u\r\n",
1896                                 i, payload->report->report_block[i]->ia_jitter);
1897                 ast_str_append(&report_string, 0, "Report%dLSR: %u\r\n",
1898                                 i, payload->report->report_block[i]->lsr);
1899                 ast_str_append(&report_string, 0, "Report%dDLSR: %4.4f\r\n",
1900                                 i, ((double)payload->report->report_block[i]->dlsr) / 65536);
1901                 ast_str_append(&packet_string, 0, "%s", ast_str_buffer(report_string));
1902         }
1903
1904         return ast_manager_event_blob_create(EVENT_FLAG_REPORTING,
1905                 stasis_message_type(msg) == ast_rtp_rtcp_received_type() ? "RTCPReceived" : "RTCPSent",
1906                 "%s%s",
1907                 AS_OR(channel_string, ""),
1908                 ast_str_buffer(packet_string));
1909 }
1910
1911 static struct ast_json *rtcp_report_to_json(struct stasis_message *msg,
1912         const struct stasis_message_sanitizer *sanitize)
1913 {
1914         struct rtcp_message_payload *payload = stasis_message_data(msg);
1915         RAII_VAR(struct ast_json *, json_rtcp_report, NULL, ast_json_unref);
1916         RAII_VAR(struct ast_json *, json_rtcp_report_blocks, NULL, ast_json_unref);
1917         RAII_VAR(struct ast_json *, json_rtcp_sender_info, NULL, ast_json_unref);
1918         RAII_VAR(struct ast_json *, json_channel, NULL, ast_json_unref);
1919         int i;
1920
1921         json_rtcp_report_blocks = ast_json_array_create();
1922         if (!json_rtcp_report_blocks) {
1923                 return NULL;
1924         }
1925
1926         for (i = 0; i < payload->report->reception_report_count && payload->report->report_block[i]; i++) {
1927                 struct ast_json *json_report_block;
1928                 char str_lsr[32];
1929                 snprintf(str_lsr, sizeof(str_lsr), "%u", payload->report->report_block[i]->lsr);
1930                 json_report_block = ast_json_pack("{s: i, s: i, s: i, s: i, s: i, s: s, s: i}",
1931                                 "source_ssrc", payload->report->report_block[i]->source_ssrc,
1932                                 "fraction_lost", payload->report->report_block[i]->lost_count.fraction,
1933                                 "packets_lost", payload->report->report_block[i]->lost_count.packets,
1934                                 "highest_seq_no", payload->report->report_block[i]->highest_seq_no,
1935                                 "ia_jitter", payload->report->report_block[i]->ia_jitter,
1936                                 "lsr", str_lsr,
1937                                 "dlsr", payload->report->report_block[i]->dlsr);
1938                 if (!json_report_block) {
1939                         return NULL;
1940                 }
1941
1942                 if (ast_json_array_append(json_rtcp_report_blocks, json_report_block)) {
1943                         return NULL;
1944                 }
1945         }
1946
1947         if (payload->report->type == AST_RTP_RTCP_SR) {
1948                 char sec[32];
1949                 char usec[32];
1950                 snprintf(sec, sizeof(sec), "%lu", (unsigned long)payload->report->sender_information.ntp_timestamp.tv_sec);
1951                 snprintf(usec, sizeof(usec), "%lu", (unsigned long)payload->report->sender_information.ntp_timestamp.tv_usec);
1952                 json_rtcp_sender_info = ast_json_pack("{s: s, s: s, s: i, s: i, s: i}",
1953                                 "ntp_timestamp_sec", sec,
1954                                 "ntp_timestamp_usec", usec,
1955                                 "rtp_timestamp", payload->report->sender_information.rtp_timestamp,
1956                                 "packets", payload->report->sender_information.packet_count,
1957                                 "octets", payload->report->sender_information.octet_count);
1958                 if (!json_rtcp_sender_info) {
1959                         return NULL;
1960                 }
1961         }
1962
1963         json_rtcp_report = ast_json_pack("{s: i, s: i, s: i, s: O, s: O}",
1964                         "ssrc", payload->report->ssrc,
1965                         "type", payload->report->type,
1966                         "report_count", payload->report->reception_report_count,
1967                         "sender_information", json_rtcp_sender_info ? json_rtcp_sender_info : ast_json_null(),
1968                         "report_blocks", json_rtcp_report_blocks);
1969         if (!json_rtcp_report) {
1970                 return NULL;
1971         }
1972
1973         if (payload->snapshot) {
1974                 json_channel = ast_channel_snapshot_to_json(payload->snapshot, sanitize);
1975                 if (!json_channel) {
1976                         return NULL;
1977                 }
1978         }
1979
1980         return ast_json_pack("{s: O, s: O, s: O}",
1981                 "channel", payload->snapshot ? json_channel : ast_json_null(),
1982                 "rtcp_report", json_rtcp_report,
1983                 "blob", payload->blob);
1984 }
1985
1986 static void rtp_rtcp_report_dtor(void *obj)
1987 {
1988         int i;
1989         struct ast_rtp_rtcp_report *rtcp_report = obj;
1990
1991         for (i = 0; i < rtcp_report->reception_report_count; i++) {
1992                 ast_free(rtcp_report->report_block[i]);
1993         }
1994 }
1995
1996 struct ast_rtp_rtcp_report *ast_rtp_rtcp_report_alloc(unsigned int report_blocks)
1997 {
1998         struct ast_rtp_rtcp_report *rtcp_report;
1999
2000         /* Size of object is sizeof the report + the number of report_blocks * sizeof pointer */
2001         rtcp_report = ao2_alloc((sizeof(*rtcp_report) + report_blocks * sizeof(struct ast_rtp_rtcp_report_block *)),
2002                 rtp_rtcp_report_dtor);
2003
2004         return rtcp_report;
2005 }
2006
2007 void ast_rtp_publish_rtcp_message(struct ast_rtp_instance *rtp,
2008                 struct stasis_message_type *message_type,
2009                 struct ast_rtp_rtcp_report *report,
2010                 struct ast_json *blob)
2011 {
2012         RAII_VAR(struct rtcp_message_payload *, payload, NULL, ao2_cleanup);
2013         RAII_VAR(struct stasis_message *, message, NULL, ao2_cleanup);
2014
2015         if (!message_type) {
2016                 return;
2017         }
2018
2019         payload = ao2_alloc(sizeof(*payload), rtcp_message_payload_dtor);
2020         if (!payload || !report) {
2021                 return;
2022         }
2023
2024         if (!ast_strlen_zero(rtp->channel_uniqueid)) {
2025                 payload->snapshot = ast_channel_snapshot_get_latest(rtp->channel_uniqueid);
2026         }
2027         if (blob) {
2028                 payload->blob = blob;
2029                 ast_json_ref(blob);
2030         }
2031         ao2_ref(report, +1);
2032         payload->report = report;
2033
2034         message = stasis_message_create(message_type, payload);
2035         if (!message) {
2036                 return;
2037         }
2038
2039         stasis_publish(ast_rtp_topic(), message);
2040 }
2041
2042 /*!
2043  * @{ \brief Define RTCP/RTP message types.
2044  */
2045 STASIS_MESSAGE_TYPE_DEFN(ast_rtp_rtcp_sent_type,
2046                 .to_ami = rtcp_report_to_ami,
2047                 .to_json = rtcp_report_to_json,);
2048 STASIS_MESSAGE_TYPE_DEFN(ast_rtp_rtcp_received_type,
2049                 .to_ami = rtcp_report_to_ami,
2050                 .to_json = rtcp_report_to_json,);
2051 /*! @} */
2052
2053 struct stasis_topic *ast_rtp_topic(void)
2054 {
2055         return rtp_topic;
2056 }
2057
2058 static void rtp_engine_shutdown(void)
2059 {
2060         int x;
2061
2062         ao2_cleanup(rtp_topic);
2063         rtp_topic = NULL;
2064         STASIS_MESSAGE_TYPE_CLEANUP(ast_rtp_rtcp_received_type);
2065         STASIS_MESSAGE_TYPE_CLEANUP(ast_rtp_rtcp_sent_type);
2066
2067         ast_rwlock_wrlock(&static_RTP_PT_lock);
2068         for (x = 0; x < AST_RTP_MAX_PT; x++) {
2069                 if (static_RTP_PT[x].format) {
2070                         rtp_engine_static_RTP_PT_cleanup(x);
2071                 }
2072         }
2073         ast_rwlock_unlock(&static_RTP_PT_lock);
2074
2075         ast_rwlock_wrlock(&mime_types_lock);
2076         for (x = 0; x < mime_types_len; x++) {
2077                 if (ast_rtp_mime_types[x].payload_type.format) {
2078                         rtp_engine_mime_type_cleanup(x);
2079                 }
2080         }
2081         ast_rwlock_unlock(&mime_types_lock);
2082 }
2083
2084 int ast_rtp_engine_init()
2085 {
2086         ast_rwlock_init(&mime_types_lock);
2087         ast_rwlock_init(&static_RTP_PT_lock);
2088
2089         rtp_topic = stasis_topic_create("rtp_topic");
2090         if (!rtp_topic) {
2091                 return -1;
2092         }
2093         STASIS_MESSAGE_TYPE_INIT(ast_rtp_rtcp_sent_type);
2094         STASIS_MESSAGE_TYPE_INIT(ast_rtp_rtcp_received_type);
2095         ast_register_cleanup(rtp_engine_shutdown);
2096
2097         /* Define all the RTP mime types available */
2098         set_next_mime_type(ast_format_g723, 0, "audio", "G723", 8000);
2099         set_next_mime_type(ast_format_gsm, 0, "audio", "GSM", 8000);
2100         set_next_mime_type(ast_format_ulaw, 0, "audio", "PCMU", 8000);
2101         set_next_mime_type(ast_format_ulaw, 0, "audio", "G711U", 8000);
2102         set_next_mime_type(ast_format_alaw, 0, "audio", "PCMA", 8000);
2103         set_next_mime_type(ast_format_alaw, 0, "audio", "G711A", 8000);
2104         set_next_mime_type(ast_format_g726, 0, "audio", "G726-32", 8000);
2105         set_next_mime_type(ast_format_adpcm, 0, "audio", "DVI4", 8000);
2106         set_next_mime_type(ast_format_slin, 0, "audio", "L16", 8000);
2107         set_next_mime_type(ast_format_slin16, 0, "audio", "L16", 16000);
2108         set_next_mime_type(ast_format_slin16, 0, "audio", "L16-256", 16000);
2109         set_next_mime_type(ast_format_slin12, 0, "audio", "L16", 12000);
2110         set_next_mime_type(ast_format_slin24, 0, "audio", "L16", 24000);
2111         set_next_mime_type(ast_format_slin32, 0, "audio", "L16", 32000);
2112         set_next_mime_type(ast_format_slin44, 0, "audio", "L16", 44000);
2113         set_next_mime_type(ast_format_slin48, 0, "audio", "L16", 48000);
2114         set_next_mime_type(ast_format_slin96, 0, "audio", "L16", 96000);
2115         set_next_mime_type(ast_format_slin192, 0, "audio", "L16", 192000);
2116         set_next_mime_type(ast_format_lpc10, 0, "audio", "LPC", 8000);
2117         set_next_mime_type(ast_format_g729, 0, "audio", "G729", 8000);
2118         set_next_mime_type(ast_format_g729, 0, "audio", "G729A", 8000);
2119         set_next_mime_type(ast_format_g729, 0, "audio", "G.729", 8000);
2120         set_next_mime_type(ast_format_speex, 0, "audio", "speex", 8000);
2121         set_next_mime_type(ast_format_speex16, 0,  "audio", "speex", 16000);
2122         set_next_mime_type(ast_format_speex32, 0,  "audio", "speex", 32000);
2123         set_next_mime_type(ast_format_ilbc, 0, "audio", "iLBC", 8000);
2124         /* this is the sample rate listed in the RTP profile for the G.722 codec, *NOT* the actual sample rate of the media stream */
2125         set_next_mime_type(ast_format_g722, 0, "audio", "G722", 8000);
2126         set_next_mime_type(ast_format_g726_aal2, 0, "audio", "AAL2-G726-32", 8000);
2127         set_next_mime_type(NULL, AST_RTP_DTMF, "audio", "telephone-event", 8000);
2128         set_next_mime_type(NULL, AST_RTP_CISCO_DTMF, "audio", "cisco-telephone-event", 8000);
2129         set_next_mime_type(NULL, AST_RTP_CN, "audio", "CN", 8000);
2130         set_next_mime_type(ast_format_jpeg, 0, "video", "JPEG", 90000);
2131         set_next_mime_type(ast_format_png, 0, "video", "PNG", 90000);
2132         set_next_mime_type(ast_format_h261, 0, "video", "H261", 90000);
2133         set_next_mime_type(ast_format_h263, 0, "video", "H263", 90000);
2134         set_next_mime_type(ast_format_h263p, 0, "video", "h263-1998", 90000);
2135         set_next_mime_type(ast_format_h264, 0, "video", "H264", 90000);
2136         set_next_mime_type(ast_format_mp4, 0, "video", "MP4V-ES", 90000);
2137         set_next_mime_type(ast_format_t140_red, 0, "text", "RED", 1000);
2138         set_next_mime_type(ast_format_t140, 0, "text", "T140", 1000);
2139         set_next_mime_type(ast_format_siren7, 0, "audio", "G7221", 16000);
2140         set_next_mime_type(ast_format_siren14, 0, "audio", "G7221", 32000);
2141         set_next_mime_type(ast_format_g719, 0, "audio", "G719", 48000);
2142         /* Opus and VP8 */
2143         set_next_mime_type(ast_format_opus, 0,  "audio", "opus", 48000);
2144         set_next_mime_type(ast_format_vp8, 0,  "video", "VP8", 90000);
2145
2146         /* Define the static rtp payload mappings */
2147         add_static_payload(0, ast_format_ulaw, 0);
2148         #ifdef USE_DEPRECATED_G726
2149         add_static_payload(2, ast_format_g726, 0);/* Technically this is G.721, but if Cisco can do it, so can we... */
2150         #endif
2151         add_static_payload(3, ast_format_gsm, 0);
2152         add_static_payload(4, ast_format_g723, 0);
2153         add_static_payload(5, ast_format_adpcm, 0);/* 8 kHz */
2154         add_static_payload(6, ast_format_adpcm, 0); /* 16 kHz */
2155         add_static_payload(7, ast_format_lpc10, 0);
2156         add_static_payload(8, ast_format_alaw, 0);
2157         add_static_payload(9, ast_format_g722, 0);
2158         add_static_payload(10, ast_format_slin, 0); /* 2 channels */
2159         add_static_payload(11, ast_format_slin, 0); /* 1 channel */
2160         add_static_payload(13, NULL, AST_RTP_CN);
2161         add_static_payload(16, ast_format_adpcm, 0); /* 11.025 kHz */
2162         add_static_payload(17, ast_format_adpcm, 0); /* 22.050 kHz */
2163         add_static_payload(18, ast_format_g729, 0);
2164         add_static_payload(19, NULL, AST_RTP_CN);         /* Also used for CN */
2165         add_static_payload(26, ast_format_jpeg, 0);
2166         add_static_payload(31, ast_format_h261, 0);
2167         add_static_payload(34, ast_format_h263, 0);
2168         add_static_payload(97, ast_format_ilbc, 0);
2169         add_static_payload(98, ast_format_h263p, 0);
2170         add_static_payload(99, ast_format_h264, 0);
2171         add_static_payload(101, NULL, AST_RTP_DTMF);
2172         add_static_payload(102, ast_format_siren7, 0);
2173         add_static_payload(103, ast_format_h263p, 0);
2174         add_static_payload(104, ast_format_mp4, 0);
2175         add_static_payload(105, ast_format_t140_red, 0);   /* Real time text chat (with redundancy encoding) */
2176         add_static_payload(106, ast_format_t140, 0);     /* Real time text chat */
2177         add_static_payload(110, ast_format_speex, 0);
2178         add_static_payload(111, ast_format_g726, 0);
2179         add_static_payload(112, ast_format_g726_aal2, 0);
2180         add_static_payload(115, ast_format_siren14, 0);
2181         add_static_payload(116, ast_format_g719, 0);
2182         add_static_payload(117, ast_format_speex16, 0);
2183         add_static_payload(118, ast_format_slin16, 0); /* 16 Khz signed linear */
2184         add_static_payload(119, ast_format_speex32, 0);
2185         add_static_payload(121, NULL, AST_RTP_CISCO_DTMF);   /* Must be type 121 */
2186         add_static_payload(122, ast_format_slin12, 0);
2187         add_static_payload(123, ast_format_slin24, 0);
2188         add_static_payload(124, ast_format_slin32, 0);
2189         add_static_payload(125, ast_format_slin44, 0);
2190         add_static_payload(126, ast_format_slin48, 0);
2191         add_static_payload(127, ast_format_slin96, 0);
2192         /* payload types above 127 are not valid */
2193         add_static_payload(96, ast_format_slin192, 0);
2194         /* Opus and VP8 */
2195         add_static_payload(100, ast_format_vp8, 0);
2196         add_static_payload(107, ast_format_opus, 0);
2197
2198         return 0;
2199 }