res_pjsip: Add rtp_keepalive endpoint option.
[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_REGISTER_FILE()
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         /*! Time of last packet sent */
194         time_t last_tx;
195 };
196
197 /*! List of RTP engines that are currently registered */
198 static AST_RWLIST_HEAD_STATIC(engines, ast_rtp_engine);
199
200 /*! List of RTP glues */
201 static AST_RWLIST_HEAD_STATIC(glues, ast_rtp_glue);
202
203 #define MAX_RTP_MIME_TYPES 128
204
205 /*! The following array defines the MIME Media type (and subtype) for each
206    of our codecs, or RTP-specific data type. */
207 static struct ast_rtp_mime_type {
208         /*! \brief A mapping object between the Asterisk codec and this RTP payload */
209         struct ast_rtp_payload_type payload_type;
210         /*! \brief The media type */
211         char type[16];
212         /*! \brief The format type */
213         char subtype[64];
214         /*! \brief Expected sample rate of the /c subtype */
215         unsigned int sample_rate;
216 } ast_rtp_mime_types[128]; /* This will Likely not need to grow any time soon. */
217 static ast_rwlock_t mime_types_lock;
218 static int mime_types_len = 0;
219
220 /*!
221  * \brief Mapping between Asterisk codecs and rtp payload types
222  *
223  * Static (i.e., well-known) RTP payload types for our "AST_FORMAT..."s:
224  * also, our own choices for dynamic payload types.  This is our master
225  * table for transmission
226  *
227  * See http://www.iana.org/assignments/rtp-parameters for a list of
228  * assigned values
229  */
230 static struct ast_rtp_payload_type static_RTP_PT[AST_RTP_MAX_PT];
231 static ast_rwlock_t static_RTP_PT_lock;
232
233 /*! \brief \ref stasis topic for RTP related messages */
234 static struct stasis_topic *rtp_topic;
235
236
237 /*! \internal \brief Destructor for \c ast_rtp_payload_type */
238 static void rtp_payload_type_dtor(void *obj)
239 {
240         struct ast_rtp_payload_type *payload = obj;
241
242         ao2_cleanup(payload->format);
243 }
244
245 struct ast_rtp_payload_type *ast_rtp_engine_alloc_payload_type(void)
246 {
247         struct ast_rtp_payload_type *payload;
248
249         payload = ao2_alloc(sizeof(*payload), rtp_payload_type_dtor);
250
251         return payload;
252 }
253
254 int ast_rtp_engine_register2(struct ast_rtp_engine *engine, struct ast_module *module)
255 {
256         struct ast_rtp_engine *current_engine;
257
258         /* Perform a sanity check on the engine structure to make sure it has the basics */
259         if (ast_strlen_zero(engine->name) || !engine->new || !engine->destroy || !engine->write || !engine->read) {
260                 ast_log(LOG_WARNING, "RTP Engine '%s' failed sanity check so it was not registered.\n", !ast_strlen_zero(engine->name) ? engine->name : "Unknown");
261                 return -1;
262         }
263
264         /* Link owner module to the RTP engine for reference counting purposes */
265         engine->mod = module;
266
267         AST_RWLIST_WRLOCK(&engines);
268
269         /* Ensure that no two modules with the same name are registered at the same time */
270         AST_RWLIST_TRAVERSE(&engines, current_engine, entry) {
271                 if (!strcmp(current_engine->name, engine->name)) {
272                         ast_log(LOG_WARNING, "An RTP engine with the name '%s' has already been registered.\n", engine->name);
273                         AST_RWLIST_UNLOCK(&engines);
274                         return -1;
275                 }
276         }
277
278         /* The engine survived our critique. Off to the list it goes to be used */
279         AST_RWLIST_INSERT_TAIL(&engines, engine, entry);
280
281         AST_RWLIST_UNLOCK(&engines);
282
283         ast_verb(2, "Registered RTP engine '%s'\n", engine->name);
284
285         return 0;
286 }
287
288 int ast_rtp_engine_unregister(struct ast_rtp_engine *engine)
289 {
290         struct ast_rtp_engine *current_engine = NULL;
291
292         AST_RWLIST_WRLOCK(&engines);
293
294         if ((current_engine = AST_RWLIST_REMOVE(&engines, engine, entry))) {
295                 ast_verb(2, "Unregistered RTP engine '%s'\n", engine->name);
296         }
297
298         AST_RWLIST_UNLOCK(&engines);
299
300         return current_engine ? 0 : -1;
301 }
302
303 int ast_rtp_glue_register2(struct ast_rtp_glue *glue, struct ast_module *module)
304 {
305         struct ast_rtp_glue *current_glue = NULL;
306
307         if (ast_strlen_zero(glue->type)) {
308                 return -1;
309         }
310
311         glue->mod = module;
312
313         AST_RWLIST_WRLOCK(&glues);
314
315         AST_RWLIST_TRAVERSE(&glues, current_glue, entry) {
316                 if (!strcasecmp(current_glue->type, glue->type)) {
317                         ast_log(LOG_WARNING, "RTP glue with the name '%s' has already been registered.\n", glue->type);
318                         AST_RWLIST_UNLOCK(&glues);
319                         return -1;
320                 }
321         }
322
323         AST_RWLIST_INSERT_TAIL(&glues, glue, entry);
324
325         AST_RWLIST_UNLOCK(&glues);
326
327         ast_verb(2, "Registered RTP glue '%s'\n", glue->type);
328
329         return 0;
330 }
331
332 int ast_rtp_glue_unregister(struct ast_rtp_glue *glue)
333 {
334         struct ast_rtp_glue *current_glue = NULL;
335
336         AST_RWLIST_WRLOCK(&glues);
337
338         if ((current_glue = AST_RWLIST_REMOVE(&glues, glue, entry))) {
339                 ast_verb(2, "Unregistered RTP glue '%s'\n", glue->type);
340         }
341
342         AST_RWLIST_UNLOCK(&glues);
343
344         return current_glue ? 0 : -1;
345 }
346
347 static void instance_destructor(void *obj)
348 {
349         struct ast_rtp_instance *instance = obj;
350
351         /* Pass us off to the engine to destroy */
352         if (instance->data && instance->engine->destroy(instance)) {
353                 ast_debug(1, "Engine '%s' failed to destroy RTP instance '%p'\n", instance->engine->name, instance);
354                 return;
355         }
356
357         if (instance->srtp) {
358                 res_srtp->destroy(instance->srtp);
359         }
360
361         ast_rtp_codecs_payloads_destroy(&instance->codecs);
362
363         /* Drop our engine reference */
364         ast_module_unref(instance->engine->mod);
365
366         ast_debug(1, "Destroyed RTP instance '%p'\n", instance);
367 }
368
369 int ast_rtp_instance_destroy(struct ast_rtp_instance *instance)
370 {
371         ao2_ref(instance, -1);
372
373         return 0;
374 }
375
376 struct ast_rtp_instance *ast_rtp_instance_new(const char *engine_name,
377                 struct ast_sched_context *sched, const struct ast_sockaddr *sa,
378                 void *data)
379 {
380         struct ast_sockaddr address = {{0,}};
381         struct ast_rtp_instance *instance = NULL;
382         struct ast_rtp_engine *engine = NULL;
383
384         AST_RWLIST_RDLOCK(&engines);
385
386         /* If an engine name was specified try to use it or otherwise use the first one registered */
387         if (!ast_strlen_zero(engine_name)) {
388                 AST_RWLIST_TRAVERSE(&engines, engine, entry) {
389                         if (!strcmp(engine->name, engine_name)) {
390                                 break;
391                         }
392                 }
393         } else {
394                 engine = AST_RWLIST_FIRST(&engines);
395         }
396
397         /* If no engine was actually found bail out now */
398         if (!engine) {
399                 ast_log(LOG_ERROR, "No RTP engine was found. Do you have one loaded?\n");
400                 AST_RWLIST_UNLOCK(&engines);
401                 return NULL;
402         }
403
404         /* Bump up the reference count before we return so the module can not be unloaded */
405         ast_module_ref(engine->mod);
406
407         AST_RWLIST_UNLOCK(&engines);
408
409         /* Allocate a new RTP instance */
410         if (!(instance = ao2_alloc(sizeof(*instance), instance_destructor))) {
411                 ast_module_unref(engine->mod);
412                 return NULL;
413         }
414         instance->engine = engine;
415         ast_sockaddr_copy(&instance->local_address, sa);
416         ast_sockaddr_copy(&address, sa);
417
418         if (ast_rtp_codecs_payloads_initialize(&instance->codecs)) {
419                 ao2_ref(instance, -1);
420                 return NULL;
421         }
422
423         ast_debug(1, "Using engine '%s' for RTP instance '%p'\n", engine->name, instance);
424
425         /* And pass it off to the engine to setup */
426         if (instance->engine->new(instance, sched, &address, data)) {
427                 ast_debug(1, "Engine '%s' failed to setup RTP instance '%p'\n", engine->name, instance);
428                 ao2_ref(instance, -1);
429                 return NULL;
430         }
431
432         ast_debug(1, "RTP instance '%p' is setup and ready to go\n", instance);
433
434         return instance;
435 }
436
437 const char *ast_rtp_instance_get_channel_id(struct ast_rtp_instance *instance)
438 {
439         return instance->channel_uniqueid;
440 }
441
442 void ast_rtp_instance_set_channel_id(struct ast_rtp_instance *instance, const char *uniqueid)
443 {
444         ast_copy_string(instance->channel_uniqueid, uniqueid, sizeof(instance->channel_uniqueid));
445 }
446
447 void ast_rtp_instance_set_data(struct ast_rtp_instance *instance, void *data)
448 {
449         instance->data = data;
450 }
451
452 void *ast_rtp_instance_get_data(struct ast_rtp_instance *instance)
453 {
454         return instance->data;
455 }
456
457 int ast_rtp_instance_write(struct ast_rtp_instance *instance, struct ast_frame *frame)
458 {
459         return instance->engine->write(instance, frame);
460 }
461
462 struct ast_frame *ast_rtp_instance_read(struct ast_rtp_instance *instance, int rtcp)
463 {
464         return instance->engine->read(instance, rtcp);
465 }
466
467 int ast_rtp_instance_set_local_address(struct ast_rtp_instance *instance,
468                 const struct ast_sockaddr *address)
469 {
470         ast_sockaddr_copy(&instance->local_address, address);
471         return 0;
472 }
473
474 int ast_rtp_instance_set_incoming_source_address(struct ast_rtp_instance *instance,
475                                                  const struct ast_sockaddr *address)
476 {
477         ast_sockaddr_copy(&instance->incoming_source_address, address);
478
479         /* moo */
480
481         if (instance->engine->remote_address_set) {
482                 instance->engine->remote_address_set(instance, &instance->incoming_source_address);
483         }
484
485         return 0;
486 }
487
488 int ast_rtp_instance_set_requested_target_address(struct ast_rtp_instance *instance,
489                                                   const struct ast_sockaddr *address)
490 {
491         ast_sockaddr_copy(&instance->requested_target_address, address);
492
493         return ast_rtp_instance_set_incoming_source_address(instance, address);
494 }
495
496 int ast_rtp_instance_get_and_cmp_local_address(struct ast_rtp_instance *instance,
497                 struct ast_sockaddr *address)
498 {
499         if (ast_sockaddr_cmp(address, &instance->local_address) != 0) {
500                 ast_sockaddr_copy(address, &instance->local_address);
501                 return 1;
502         }
503
504         return 0;
505 }
506
507 void ast_rtp_instance_get_local_address(struct ast_rtp_instance *instance,
508                 struct ast_sockaddr *address)
509 {
510         ast_sockaddr_copy(address, &instance->local_address);
511 }
512
513 int ast_rtp_instance_get_and_cmp_requested_target_address(struct ast_rtp_instance *instance,
514                 struct ast_sockaddr *address)
515 {
516         if (ast_sockaddr_cmp(address, &instance->requested_target_address) != 0) {
517                 ast_sockaddr_copy(address, &instance->requested_target_address);
518                 return 1;
519         }
520
521         return 0;
522 }
523
524 void ast_rtp_instance_get_incoming_source_address(struct ast_rtp_instance *instance,
525                                                   struct ast_sockaddr *address)
526 {
527         ast_sockaddr_copy(address, &instance->incoming_source_address);
528 }
529
530 void ast_rtp_instance_get_requested_target_address(struct ast_rtp_instance *instance,
531                                                    struct ast_sockaddr *address)
532 {
533         ast_sockaddr_copy(address, &instance->requested_target_address);
534 }
535
536 void ast_rtp_instance_set_extended_prop(struct ast_rtp_instance *instance, int property, void *value)
537 {
538         if (instance->engine->extended_prop_set) {
539                 instance->engine->extended_prop_set(instance, property, value);
540         }
541 }
542
543 void *ast_rtp_instance_get_extended_prop(struct ast_rtp_instance *instance, int property)
544 {
545         if (instance->engine->extended_prop_get) {
546                 return instance->engine->extended_prop_get(instance, property);
547         }
548
549         return NULL;
550 }
551
552 void ast_rtp_instance_set_prop(struct ast_rtp_instance *instance, enum ast_rtp_property property, int value)
553 {
554         instance->properties[property] = value;
555
556         if (instance->engine->prop_set) {
557                 instance->engine->prop_set(instance, property, value);
558         }
559 }
560
561 int ast_rtp_instance_get_prop(struct ast_rtp_instance *instance, enum ast_rtp_property property)
562 {
563         return instance->properties[property];
564 }
565
566 struct ast_rtp_codecs *ast_rtp_instance_get_codecs(struct ast_rtp_instance *instance)
567 {
568         return &instance->codecs;
569 }
570
571 int ast_rtp_codecs_payloads_initialize(struct ast_rtp_codecs *codecs)
572 {
573         int res;
574
575         codecs->framing = 0;
576         ast_rwlock_init(&codecs->codecs_lock);
577         res = AST_VECTOR_INIT(&codecs->payloads, AST_RTP_MAX_PT);
578
579         return res;
580 }
581
582 void ast_rtp_codecs_payloads_destroy(struct ast_rtp_codecs *codecs)
583 {
584         int i;
585
586         for (i = 0; i < AST_VECTOR_SIZE(&codecs->payloads); i++) {
587                 struct ast_rtp_payload_type *type;
588
589                 type = AST_VECTOR_GET(&codecs->payloads, i);
590                 ao2_t_cleanup(type, "destroying ast_rtp_codec");
591         }
592         AST_VECTOR_FREE(&codecs->payloads);
593
594         ast_rwlock_destroy(&codecs->codecs_lock);
595 }
596
597 void ast_rtp_codecs_payloads_clear(struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance)
598 {
599         ast_rtp_codecs_payloads_destroy(codecs);
600
601         if (instance && instance->engine && instance->engine->payload_set) {
602                 int i;
603                 for (i = 0; i < AST_RTP_MAX_PT; i++) {
604                         instance->engine->payload_set(instance, i, 0, NULL, 0);
605                 }
606         }
607
608         ast_rtp_codecs_payloads_initialize(codecs);
609 }
610
611 void ast_rtp_codecs_payloads_copy(struct ast_rtp_codecs *src, struct ast_rtp_codecs *dest, struct ast_rtp_instance *instance)
612 {
613         int i;
614
615         ast_rwlock_rdlock(&src->codecs_lock);
616         ast_rwlock_wrlock(&dest->codecs_lock);
617
618         for (i = 0; i < AST_VECTOR_SIZE(&src->payloads); i++) {
619                 struct ast_rtp_payload_type *type;
620
621                 type = AST_VECTOR_GET(&src->payloads, i);
622                 if (!type) {
623                         continue;
624                 }
625                 if (i < AST_VECTOR_SIZE(&dest->payloads)) {
626                         ao2_t_cleanup(AST_VECTOR_GET(&dest->payloads, i), "cleaning up vector element about to be replaced");
627                 }
628                 ast_debug(2, "Copying payload %d (%p) from %p to %p\n", i, type, src, dest);
629                 ao2_bump(type);
630                 AST_VECTOR_REPLACE(&dest->payloads, i, type);
631
632                 if (instance && instance->engine && instance->engine->payload_set) {
633                         instance->engine->payload_set(instance, i, type->asterisk_format, type->format, type->rtp_code);
634                 }
635         }
636         dest->framing = src->framing;
637         ast_rwlock_unlock(&dest->codecs_lock);
638         ast_rwlock_unlock(&src->codecs_lock);
639 }
640
641 void ast_rtp_codecs_payloads_set_m_type(struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance, int payload)
642 {
643         struct ast_rtp_payload_type *new_type;
644
645         new_type = ast_rtp_engine_alloc_payload_type();
646         if (!new_type) {
647                 return;
648         }
649
650         ast_rwlock_rdlock(&static_RTP_PT_lock);
651         if (payload < 0 || payload >= AST_RTP_MAX_PT) {
652                 ast_rwlock_unlock(&static_RTP_PT_lock);
653                 return;
654         }
655
656         ast_rwlock_wrlock(&codecs->codecs_lock);
657         if (payload < AST_VECTOR_SIZE(&codecs->payloads)) {
658                 ao2_t_cleanup(AST_VECTOR_GET(&codecs->payloads, payload), "cleaning up replaced payload type");
659         }
660
661         new_type->asterisk_format = static_RTP_PT[payload].asterisk_format;
662         new_type->rtp_code = static_RTP_PT[payload].rtp_code;
663         new_type->payload = payload;
664         new_type->format = ao2_bump(static_RTP_PT[payload].format);
665
666         ast_debug(1, "Setting payload %d (%p) based on m type on %p\n", payload, new_type, codecs);
667         AST_VECTOR_REPLACE(&codecs->payloads, payload, new_type);
668
669         if (instance && instance->engine && instance->engine->payload_set) {
670                 instance->engine->payload_set(instance, payload, new_type->asterisk_format, new_type->format, new_type->rtp_code);
671         }
672
673         ast_rwlock_unlock(&codecs->codecs_lock);
674         ast_rwlock_unlock(&static_RTP_PT_lock);
675 }
676
677 int ast_rtp_codecs_payloads_set_rtpmap_type_rate(struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance, int pt,
678                                  char *mimetype, char *mimesubtype,
679                                  enum ast_rtp_options options,
680                                  unsigned int sample_rate)
681 {
682         unsigned int i;
683         int found = 0;
684
685         ast_rwlock_rdlock(&mime_types_lock);
686         if (pt < 0 || pt >= AST_RTP_MAX_PT) {
687                 ast_rwlock_unlock(&mime_types_lock);
688                 return -1; /* bogus payload type */
689         }
690
691         ast_rwlock_wrlock(&codecs->codecs_lock);
692         for (i = 0; i < mime_types_len; ++i) {
693                 const struct ast_rtp_mime_type *t = &ast_rtp_mime_types[i];
694                 struct ast_rtp_payload_type *new_type;
695
696                 if (strcasecmp(mimesubtype, t->subtype)) {
697                         continue;
698                 }
699
700                 if (strcasecmp(mimetype, t->type)) {
701                         continue;
702                 }
703
704                 /* if both sample rates have been supplied, and they don't match,
705                  * then this not a match; if one has not been supplied, then the
706                  * rates are not compared */
707                 if (sample_rate && t->sample_rate &&
708                     (sample_rate != t->sample_rate)) {
709                         continue;
710                 }
711
712                 found = 1;
713
714                 new_type = ast_rtp_engine_alloc_payload_type();
715                 if (!new_type) {
716                         continue;
717                 }
718
719                 if (pt < AST_VECTOR_SIZE(&codecs->payloads)) {
720                         ao2_t_cleanup(AST_VECTOR_GET(&codecs->payloads, pt), "cleaning up replaced payload type");
721                 }
722
723                 new_type->payload = pt;
724                 new_type->asterisk_format = t->payload_type.asterisk_format;
725                 new_type->rtp_code = t->payload_type.rtp_code;
726                 if ((ast_format_cmp(t->payload_type.format, ast_format_g726) == AST_FORMAT_CMP_EQUAL) &&
727                                 t->payload_type.asterisk_format && (options & AST_RTP_OPT_G726_NONSTANDARD)) {
728                         new_type->format = ao2_bump(ast_format_g726_aal2);
729                 } else {
730                         new_type->format = ao2_bump(t->payload_type.format);
731                 }
732                 AST_VECTOR_REPLACE(&codecs->payloads, pt, new_type);
733
734                 if (instance && instance->engine && instance->engine->payload_set) {
735                         instance->engine->payload_set(instance, pt, new_type->asterisk_format, new_type->format, new_type->rtp_code);
736                 }
737
738                 break;
739         }
740         ast_rwlock_unlock(&codecs->codecs_lock);
741         ast_rwlock_unlock(&mime_types_lock);
742
743         return (found ? 0 : -2);
744 }
745
746 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)
747 {
748         return ast_rtp_codecs_payloads_set_rtpmap_type_rate(codecs, instance, payload, mimetype, mimesubtype, options, 0);
749 }
750
751 void ast_rtp_codecs_payloads_unset(struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance, int payload)
752 {
753         struct ast_rtp_payload_type *type;
754
755         if (payload < 0 || payload >= AST_RTP_MAX_PT) {
756                 return;
757         }
758
759         ast_debug(2, "Unsetting payload %d on %p\n", payload, codecs);
760
761         ast_rwlock_wrlock(&codecs->codecs_lock);
762         if (payload < AST_VECTOR_SIZE(&codecs->payloads)) {
763                 type = AST_VECTOR_GET(&codecs->payloads, payload);
764                 ao2_cleanup(type);
765                 AST_VECTOR_REPLACE(&codecs->payloads, payload, NULL);
766         }
767
768         if (instance && instance->engine && instance->engine->payload_set) {
769                 instance->engine->payload_set(instance, payload, 0, NULL, 0);
770         }
771
772         ast_rwlock_unlock(&codecs->codecs_lock);
773 }
774
775 struct ast_rtp_payload_type *ast_rtp_codecs_get_payload(struct ast_rtp_codecs *codecs, int payload)
776 {
777         struct ast_rtp_payload_type *type = NULL;
778
779         if (payload < 0 || payload >= AST_RTP_MAX_PT) {
780                 return NULL;
781         }
782
783         ast_rwlock_rdlock(&codecs->codecs_lock);
784         if (payload < AST_VECTOR_SIZE(&codecs->payloads)) {
785                 type = AST_VECTOR_GET(&codecs->payloads, payload);
786                 ao2_bump(type);
787         }
788         ast_rwlock_unlock(&codecs->codecs_lock);
789
790         if (!type) {
791                 type = ast_rtp_engine_alloc_payload_type();
792                 if (!type) {
793                         return NULL;
794                 }
795                 ast_rwlock_rdlock(&static_RTP_PT_lock);
796                 type->asterisk_format = static_RTP_PT[payload].asterisk_format;
797                 type->rtp_code = static_RTP_PT[payload].rtp_code;
798                 type->payload = payload;
799                 type->format = ao2_bump(static_RTP_PT[payload].format);
800                 ast_rwlock_unlock(&static_RTP_PT_lock);
801         }
802
803         return type;
804 }
805
806 int ast_rtp_codecs_payload_replace_format(struct ast_rtp_codecs *codecs, int payload, struct ast_format *format)
807 {
808         struct ast_rtp_payload_type *type;
809
810         if (payload < 0 || payload >= AST_RTP_MAX_PT) {
811                 return -1;
812         }
813
814         ast_rwlock_wrlock(&codecs->codecs_lock);
815         if (payload < AST_VECTOR_SIZE(&codecs->payloads)) {
816                 type = AST_VECTOR_GET(&codecs->payloads, payload);
817                 if (type && type->asterisk_format) {
818                         ao2_replace(type->format, format);
819                 }
820         }
821         ast_rwlock_unlock(&codecs->codecs_lock);
822
823         return 0;
824 }
825
826 struct ast_format *ast_rtp_codecs_get_payload_format(struct ast_rtp_codecs *codecs, int payload)
827 {
828         struct ast_rtp_payload_type *type;
829         struct ast_format *format = NULL;
830
831         if (payload < 0 || payload >= AST_RTP_MAX_PT) {
832                 return NULL;
833         }
834
835         ast_rwlock_rdlock(&codecs->codecs_lock);
836         if (payload < AST_VECTOR_SIZE(&codecs->payloads)) {
837                 type = AST_VECTOR_GET(&codecs->payloads, payload);
838                 if (type && type->asterisk_format) {
839                         format = ao2_bump(type->format);
840                 }
841         }
842         ast_rwlock_unlock(&codecs->codecs_lock);
843
844         return format;
845 }
846
847 void ast_rtp_codecs_set_framing(struct ast_rtp_codecs *codecs, unsigned int framing)
848 {
849         if (!framing) {
850                 return;
851         }
852
853         ast_rwlock_wrlock(&codecs->codecs_lock);
854         codecs->framing = framing;
855         ast_rwlock_unlock(&codecs->codecs_lock);
856 }
857
858 unsigned int ast_rtp_codecs_get_framing(struct ast_rtp_codecs *codecs)
859 {
860         unsigned int framing;
861
862         ast_rwlock_rdlock(&codecs->codecs_lock);
863         framing = codecs->framing;
864         ast_rwlock_unlock(&codecs->codecs_lock);
865
866         return framing;
867 }
868
869 void ast_rtp_codecs_payload_formats(struct ast_rtp_codecs *codecs, struct ast_format_cap *astformats, int *nonastformats)
870 {
871         int i;
872
873         ast_format_cap_remove_by_type(astformats, AST_MEDIA_TYPE_UNKNOWN);
874         *nonastformats = 0;
875
876         ast_rwlock_rdlock(&codecs->codecs_lock);
877         for (i = 0; i < AST_VECTOR_SIZE(&codecs->payloads); i++) {
878                 struct ast_rtp_payload_type *type;
879
880                 type = AST_VECTOR_GET(&codecs->payloads, i);
881                 if (!type) {
882                         continue;
883                 }
884
885                 if (type->asterisk_format) {
886                         ast_format_cap_append(astformats, type->format, 0);
887                 } else {
888                         *nonastformats |= type->rtp_code;
889                 }
890         }
891
892         if (codecs->framing) {
893                 ast_format_cap_set_framing(astformats, codecs->framing);
894         }
895
896         ast_rwlock_unlock(&codecs->codecs_lock);
897 }
898
899 int ast_rtp_codecs_payload_code(struct ast_rtp_codecs *codecs, int asterisk_format, const struct ast_format *format, int code)
900 {
901         struct ast_rtp_payload_type *type;
902         int i;
903         int payload = -1;
904
905         ast_rwlock_rdlock(&codecs->codecs_lock);
906         for (i = 0; i < AST_VECTOR_SIZE(&codecs->payloads); i++) {
907                 type = AST_VECTOR_GET(&codecs->payloads, i);
908                 if (!type) {
909                         continue;
910                 }
911
912                 if ((asterisk_format && format && ast_format_cmp(format, type->format) == AST_FORMAT_CMP_EQUAL)
913                         || (!asterisk_format && type->rtp_code == code)) {
914                         payload = i;
915                         break;
916                 }
917         }
918         ast_rwlock_unlock(&codecs->codecs_lock);
919
920         if (payload < 0) {
921                 ast_rwlock_rdlock(&static_RTP_PT_lock);
922                 for (i = 0; i < AST_RTP_MAX_PT; i++) {
923                         if (static_RTP_PT[i].asterisk_format && asterisk_format && format &&
924                                 (ast_format_cmp(format, static_RTP_PT[i].format) != AST_FORMAT_CMP_NOT_EQUAL)) {
925                                 payload = i;
926                                 break;
927                         } else if (!static_RTP_PT[i].asterisk_format && !asterisk_format &&
928                                 (static_RTP_PT[i].rtp_code == code)) {
929                                 payload = i;
930                                 break;
931                         }
932                 }
933                 ast_rwlock_unlock(&static_RTP_PT_lock);
934         }
935
936         return payload;
937 }
938
939 int ast_rtp_codecs_find_payload_code(struct ast_rtp_codecs *codecs, int code)
940 {
941         struct ast_rtp_payload_type *type;
942         int res = -1;
943
944         ast_rwlock_rdlock(&codecs->codecs_lock);
945         if (code < AST_VECTOR_SIZE(&codecs->payloads)) {
946                 type = AST_VECTOR_GET(&codecs->payloads, code);
947                 if (type) {
948                         res = type->payload;
949                 }
950         }
951         ast_rwlock_unlock(&codecs->codecs_lock);
952
953         return res;
954 }
955
956 const char *ast_rtp_lookup_mime_subtype2(const int asterisk_format, struct ast_format *format, int code, enum ast_rtp_options options)
957 {
958         int i;
959         const char *res = "";
960
961         ast_rwlock_rdlock(&mime_types_lock);
962         for (i = 0; i < mime_types_len; i++) {
963                 if (ast_rtp_mime_types[i].payload_type.asterisk_format && asterisk_format && format &&
964                         (ast_format_cmp(format, ast_rtp_mime_types[i].payload_type.format) != AST_FORMAT_CMP_NOT_EQUAL)) {
965                         if ((ast_format_cmp(format, ast_format_g726_aal2) == AST_FORMAT_CMP_EQUAL) &&
966                                         (options & AST_RTP_OPT_G726_NONSTANDARD)) {
967                                 res = "G726-32";
968                                 break;
969                         } else {
970                                 res = ast_rtp_mime_types[i].subtype;
971                                 break;
972                         }
973                 } else if (!ast_rtp_mime_types[i].payload_type.asterisk_format && !asterisk_format &&
974                         ast_rtp_mime_types[i].payload_type.rtp_code == code) {
975
976                         res = ast_rtp_mime_types[i].subtype;
977                         break;
978                 }
979         }
980         ast_rwlock_unlock(&mime_types_lock);
981
982         return res;
983 }
984
985 unsigned int ast_rtp_lookup_sample_rate2(int asterisk_format, struct ast_format *format, int code)
986 {
987         unsigned int i;
988         unsigned int res = 0;
989
990         ast_rwlock_rdlock(&mime_types_lock);
991         for (i = 0; i < mime_types_len; ++i) {
992                 if (ast_rtp_mime_types[i].payload_type.asterisk_format && asterisk_format && format &&
993                         (ast_format_cmp(format, ast_rtp_mime_types[i].payload_type.format) != AST_FORMAT_CMP_NOT_EQUAL)) {
994                         res = ast_rtp_mime_types[i].sample_rate;
995                         break;
996                 } else if (!ast_rtp_mime_types[i].payload_type.asterisk_format && !asterisk_format &&
997                         ast_rtp_mime_types[i].payload_type.rtp_code == code) {
998                         res = ast_rtp_mime_types[i].sample_rate;
999                         break;
1000                 }
1001         }
1002         ast_rwlock_unlock(&mime_types_lock);
1003
1004         return res;
1005 }
1006
1007 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)
1008 {
1009         int found = 0;
1010         const char *name;
1011         if (!buf) {
1012                 return NULL;
1013         }
1014
1015
1016         if (asterisk_format) {
1017                 int x;
1018                 struct ast_format *tmp_fmt;
1019                 for (x = 0; x < ast_format_cap_count(ast_format_capability); x++) {
1020                         tmp_fmt = ast_format_cap_get_format(ast_format_capability, x);
1021                         name = ast_rtp_lookup_mime_subtype2(asterisk_format, tmp_fmt, 0, options);
1022                         ao2_ref(tmp_fmt, -1);
1023                         ast_str_append(&buf, 0, "%s|", name);
1024                         found = 1;
1025                 }
1026         } else {
1027                 int x;
1028                 ast_str_append(&buf, 0, "0x%x (", (unsigned int) rtp_capability);
1029                 for (x = 1; x <= AST_RTP_MAX; x <<= 1) {
1030                         if (rtp_capability & x) {
1031                                 name = ast_rtp_lookup_mime_subtype2(asterisk_format, NULL, x, options);
1032                                 ast_str_append(&buf, 0, "%s|", name);
1033                                 found = 1;
1034                         }
1035                 }
1036         }
1037
1038         ast_str_append(&buf, 0, "%s", found ? ")" : "nothing)");
1039
1040         return ast_str_buffer(buf);
1041 }
1042
1043 int ast_rtp_instance_dtmf_begin(struct ast_rtp_instance *instance, char digit)
1044 {
1045         return instance->engine->dtmf_begin ? instance->engine->dtmf_begin(instance, digit) : -1;
1046 }
1047
1048 int ast_rtp_instance_dtmf_end(struct ast_rtp_instance *instance, char digit)
1049 {
1050         return instance->engine->dtmf_end ? instance->engine->dtmf_end(instance, digit) : -1;
1051 }
1052 int ast_rtp_instance_dtmf_end_with_duration(struct ast_rtp_instance *instance, char digit, unsigned int duration)
1053 {
1054         return instance->engine->dtmf_end_with_duration ? instance->engine->dtmf_end_with_duration(instance, digit, duration) : -1;
1055 }
1056
1057 int ast_rtp_instance_dtmf_mode_set(struct ast_rtp_instance *instance, enum ast_rtp_dtmf_mode dtmf_mode)
1058 {
1059         return (!instance->engine->dtmf_mode_set || instance->engine->dtmf_mode_set(instance, dtmf_mode)) ? -1 : 0;
1060 }
1061
1062 enum ast_rtp_dtmf_mode ast_rtp_instance_dtmf_mode_get(struct ast_rtp_instance *instance)
1063 {
1064         return instance->engine->dtmf_mode_get ? instance->engine->dtmf_mode_get(instance) : 0;
1065 }
1066
1067 void ast_rtp_instance_update_source(struct ast_rtp_instance *instance)
1068 {
1069         if (instance->engine->update_source) {
1070                 instance->engine->update_source(instance);
1071         }
1072 }
1073
1074 void ast_rtp_instance_change_source(struct ast_rtp_instance *instance)
1075 {
1076         if (instance->engine->change_source) {
1077                 instance->engine->change_source(instance);
1078         }
1079 }
1080
1081 int ast_rtp_instance_set_qos(struct ast_rtp_instance *instance, int tos, int cos, const char *desc)
1082 {
1083         return instance->engine->qos ? instance->engine->qos(instance, tos, cos, desc) : -1;
1084 }
1085
1086 void ast_rtp_instance_stop(struct ast_rtp_instance *instance)
1087 {
1088         if (instance->engine->stop) {
1089                 instance->engine->stop(instance);
1090         }
1091 }
1092
1093 int ast_rtp_instance_fd(struct ast_rtp_instance *instance, int rtcp)
1094 {
1095         return instance->engine->fd ? instance->engine->fd(instance, rtcp) : -1;
1096 }
1097
1098 struct ast_rtp_glue *ast_rtp_instance_get_glue(const char *type)
1099 {
1100         struct ast_rtp_glue *glue = NULL;
1101
1102         AST_RWLIST_RDLOCK(&glues);
1103
1104         AST_RWLIST_TRAVERSE(&glues, glue, entry) {
1105                 if (!strcasecmp(glue->type, type)) {
1106                         break;
1107                 }
1108         }
1109
1110         AST_RWLIST_UNLOCK(&glues);
1111
1112         return glue;
1113 }
1114
1115 /*!
1116  * \brief Conditionally unref an rtp instance
1117  */
1118 static void unref_instance_cond(struct ast_rtp_instance **instance)
1119 {
1120         if (*instance) {
1121                 ao2_ref(*instance, -1);
1122                 *instance = NULL;
1123         }
1124 }
1125
1126 struct ast_rtp_instance *ast_rtp_instance_get_bridged(struct ast_rtp_instance *instance)
1127 {
1128         return instance->bridged;
1129 }
1130
1131 void ast_rtp_instance_set_bridged(struct ast_rtp_instance *instance, struct ast_rtp_instance *bridged)
1132 {
1133         instance->bridged = bridged;
1134 }
1135
1136 void ast_rtp_instance_early_bridge_make_compatible(struct ast_channel *c_dst, struct ast_channel *c_src)
1137 {
1138         struct ast_rtp_instance *instance_dst = NULL, *instance_src = NULL,
1139                 *vinstance_dst = NULL, *vinstance_src = NULL,
1140                 *tinstance_dst = NULL, *tinstance_src = NULL;
1141         struct ast_rtp_glue *glue_dst, *glue_src;
1142         enum ast_rtp_glue_result audio_glue_dst_res = AST_RTP_GLUE_RESULT_FORBID, video_glue_dst_res = AST_RTP_GLUE_RESULT_FORBID;
1143         enum ast_rtp_glue_result audio_glue_src_res = AST_RTP_GLUE_RESULT_FORBID, video_glue_src_res = AST_RTP_GLUE_RESULT_FORBID;
1144         struct ast_format_cap *cap_dst = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
1145         struct ast_format_cap *cap_src = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
1146
1147         /* Lock both channels so we can look for the glue that binds them together */
1148         ast_channel_lock_both(c_dst, c_src);
1149
1150         if (!cap_src || !cap_dst) {
1151                 goto done;
1152         }
1153
1154         /* Grab glue that binds each channel to something using the RTP engine */
1155         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))) {
1156                 ast_debug(1, "Can't find native functions for channel '%s'\n", glue_dst ? ast_channel_name(c_src) : ast_channel_name(c_dst));
1157                 goto done;
1158         }
1159
1160         audio_glue_dst_res = glue_dst->get_rtp_info(c_dst, &instance_dst);
1161         video_glue_dst_res = glue_dst->get_vrtp_info ? glue_dst->get_vrtp_info(c_dst, &vinstance_dst) : AST_RTP_GLUE_RESULT_FORBID;
1162
1163         audio_glue_src_res = glue_src->get_rtp_info(c_src, &instance_src);
1164         video_glue_src_res = glue_src->get_vrtp_info ? glue_src->get_vrtp_info(c_src, &vinstance_src) : AST_RTP_GLUE_RESULT_FORBID;
1165
1166         /* If we are carrying video, and both sides are not going to remotely bridge... fail the native bridge */
1167         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)) {
1168                 audio_glue_dst_res = AST_RTP_GLUE_RESULT_FORBID;
1169         }
1170         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)) {
1171                 audio_glue_src_res = AST_RTP_GLUE_RESULT_FORBID;
1172         }
1173         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) {
1174                 glue_dst->get_codec(c_dst, cap_dst);
1175         }
1176         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) {
1177                 glue_src->get_codec(c_src, cap_src);
1178         }
1179
1180         /* If any sort of bridge is forbidden just completely bail out and go back to generic bridging */
1181         if (audio_glue_dst_res != AST_RTP_GLUE_RESULT_REMOTE || audio_glue_src_res != AST_RTP_GLUE_RESULT_REMOTE) {
1182                 goto done;
1183         }
1184
1185         /* Make sure we have matching codecs */
1186         if (!ast_format_cap_iscompatible(cap_dst, cap_src)) {
1187                 goto done;
1188         }
1189
1190         ast_rtp_codecs_payloads_copy(&instance_src->codecs, &instance_dst->codecs, instance_dst);
1191
1192         if (vinstance_dst && vinstance_src) {
1193                 ast_rtp_codecs_payloads_copy(&vinstance_src->codecs, &vinstance_dst->codecs, vinstance_dst);
1194         }
1195         if (tinstance_dst && tinstance_src) {
1196                 ast_rtp_codecs_payloads_copy(&tinstance_src->codecs, &tinstance_dst->codecs, tinstance_dst);
1197         }
1198
1199         if (glue_dst->update_peer(c_dst, instance_src, vinstance_src, tinstance_src, cap_src, 0)) {
1200                 ast_log(LOG_WARNING, "Channel '%s' failed to setup early bridge to '%s'\n",
1201                         ast_channel_name(c_dst), ast_channel_name(c_src));
1202         } else {
1203                 ast_debug(1, "Seeded SDP of '%s' with that of '%s'\n",
1204                         ast_channel_name(c_dst), ast_channel_name(c_src));
1205         }
1206
1207 done:
1208         ast_channel_unlock(c_dst);
1209         ast_channel_unlock(c_src);
1210
1211         ao2_cleanup(cap_dst);
1212         ao2_cleanup(cap_src);
1213
1214         unref_instance_cond(&instance_dst);
1215         unref_instance_cond(&instance_src);
1216         unref_instance_cond(&vinstance_dst);
1217         unref_instance_cond(&vinstance_src);
1218         unref_instance_cond(&tinstance_dst);
1219         unref_instance_cond(&tinstance_src);
1220 }
1221
1222 int ast_rtp_instance_early_bridge(struct ast_channel *c0, struct ast_channel *c1)
1223 {
1224         struct ast_rtp_instance *instance0 = NULL, *instance1 = NULL,
1225                         *vinstance0 = NULL, *vinstance1 = NULL,
1226                         *tinstance0 = NULL, *tinstance1 = NULL;
1227         struct ast_rtp_glue *glue0, *glue1;
1228         enum ast_rtp_glue_result audio_glue0_res = AST_RTP_GLUE_RESULT_FORBID, video_glue0_res = AST_RTP_GLUE_RESULT_FORBID;
1229         enum ast_rtp_glue_result audio_glue1_res = AST_RTP_GLUE_RESULT_FORBID, video_glue1_res = AST_RTP_GLUE_RESULT_FORBID;
1230         struct ast_format_cap *cap0 = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
1231         struct ast_format_cap *cap1 = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
1232
1233         /* If there is no second channel just immediately bail out, we are of no use in that scenario */
1234         if (!c1 || !cap1 || !cap0) {
1235                 ao2_cleanup(cap0);
1236                 ao2_cleanup(cap1);
1237                 return -1;
1238         }
1239
1240         /* Lock both channels so we can look for the glue that binds them together */
1241         ast_channel_lock_both(c0, c1);
1242
1243         /* Grab glue that binds each channel to something using the RTP engine */
1244         if (!(glue0 = ast_rtp_instance_get_glue(ast_channel_tech(c0)->type)) || !(glue1 = ast_rtp_instance_get_glue(ast_channel_tech(c1)->type))) {
1245                 ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", glue0 ? ast_channel_name(c1) : ast_channel_name(c0));
1246                 goto done;
1247         }
1248
1249         audio_glue0_res = glue0->get_rtp_info(c0, &instance0);
1250         video_glue0_res = glue0->get_vrtp_info ? glue0->get_vrtp_info(c0, &vinstance0) : AST_RTP_GLUE_RESULT_FORBID;
1251
1252         audio_glue1_res = glue1->get_rtp_info(c1, &instance1);
1253         video_glue1_res = glue1->get_vrtp_info ? glue1->get_vrtp_info(c1, &vinstance1) : AST_RTP_GLUE_RESULT_FORBID;
1254
1255         /* If we are carrying video, and both sides are not going to remotely bridge... fail the native bridge */
1256         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)) {
1257                 audio_glue0_res = AST_RTP_GLUE_RESULT_FORBID;
1258         }
1259         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)) {
1260                 audio_glue1_res = AST_RTP_GLUE_RESULT_FORBID;
1261         }
1262         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) {
1263                 glue0->get_codec(c0, cap0);
1264         }
1265         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) {
1266                 glue1->get_codec(c1, cap1);
1267         }
1268
1269         /* If any sort of bridge is forbidden just completely bail out and go back to generic bridging */
1270         if (audio_glue0_res != AST_RTP_GLUE_RESULT_REMOTE || audio_glue1_res != AST_RTP_GLUE_RESULT_REMOTE) {
1271                 goto done;
1272         }
1273
1274         /* Make sure we have matching codecs */
1275         if (!ast_format_cap_iscompatible(cap0, cap1)) {
1276                 goto done;
1277         }
1278
1279         /* Bridge media early */
1280         if (glue0->update_peer(c0, instance1, vinstance1, tinstance1, cap1, 0)) {
1281                 ast_log(LOG_WARNING, "Channel '%s' failed to setup early bridge to '%s'\n", ast_channel_name(c0), c1 ? ast_channel_name(c1) : "<unspecified>");
1282         }
1283
1284 done:
1285         ast_channel_unlock(c0);
1286         ast_channel_unlock(c1);
1287
1288         ao2_cleanup(cap0);
1289         ao2_cleanup(cap1);
1290
1291         unref_instance_cond(&instance0);
1292         unref_instance_cond(&instance1);
1293         unref_instance_cond(&vinstance0);
1294         unref_instance_cond(&vinstance1);
1295         unref_instance_cond(&tinstance0);
1296         unref_instance_cond(&tinstance1);
1297
1298         ast_debug(1, "Setting early bridge SDP of '%s' with that of '%s'\n", ast_channel_name(c0), c1 ? ast_channel_name(c1) : "<unspecified>");
1299
1300         return 0;
1301 }
1302
1303 int ast_rtp_red_init(struct ast_rtp_instance *instance, int buffer_time, int *payloads, int generations)
1304 {
1305         return instance->engine->red_init ? instance->engine->red_init(instance, buffer_time, payloads, generations) : -1;
1306 }
1307
1308 int ast_rtp_red_buffer(struct ast_rtp_instance *instance, struct ast_frame *frame)
1309 {
1310         return instance->engine->red_buffer ? instance->engine->red_buffer(instance, frame) : -1;
1311 }
1312
1313 int ast_rtp_instance_get_stats(struct ast_rtp_instance *instance, struct ast_rtp_instance_stats *stats, enum ast_rtp_instance_stat stat)
1314 {
1315         return instance->engine->get_stat ? instance->engine->get_stat(instance, stats, stat) : -1;
1316 }
1317
1318 char *ast_rtp_instance_get_quality(struct ast_rtp_instance *instance, enum ast_rtp_instance_stat_field field, char *buf, size_t size)
1319 {
1320         struct ast_rtp_instance_stats stats = { 0, };
1321         enum ast_rtp_instance_stat stat;
1322
1323         /* Determine what statistics we will need to retrieve based on field passed in */
1324         if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY) {
1325                 stat = AST_RTP_INSTANCE_STAT_ALL;
1326         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_JITTER) {
1327                 stat = AST_RTP_INSTANCE_STAT_COMBINED_JITTER;
1328         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_LOSS) {
1329                 stat = AST_RTP_INSTANCE_STAT_COMBINED_LOSS;
1330         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_RTT) {
1331                 stat = AST_RTP_INSTANCE_STAT_COMBINED_RTT;
1332         } else {
1333                 return NULL;
1334         }
1335
1336         /* Attempt to actually retrieve the statistics we need to generate the quality string */
1337         if (ast_rtp_instance_get_stats(instance, &stats, stat)) {
1338                 return NULL;
1339         }
1340
1341         /* Now actually fill the buffer with the good information */
1342         if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY) {
1343                 snprintf(buf, size, "ssrc=%u;themssrc=%u;lp=%u;rxjitter=%f;rxcount=%u;txjitter=%f;txcount=%u;rlp=%u;rtt=%f",
1344                          stats.local_ssrc, stats.remote_ssrc, stats.rxploss, stats.rxjitter, stats.rxcount, stats.txjitter, stats.txcount, stats.txploss, stats.rtt);
1345         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_JITTER) {
1346                 snprintf(buf, size, "minrxjitter=%f;maxrxjitter=%f;avgrxjitter=%f;stdevrxjitter=%f;reported_minjitter=%f;reported_maxjitter=%f;reported_avgjitter=%f;reported_stdevjitter=%f;",
1347                          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));
1348         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_LOSS) {
1349                 snprintf(buf, size, "minrxlost=%f;maxrxlost=%f;avgrxlost=%f;stdevrxlost=%f;reported_minlost=%f;reported_maxlost=%f;reported_avglost=%f;reported_stdevlost=%f;",
1350                          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));
1351         } else if (field == AST_RTP_INSTANCE_STAT_FIELD_QUALITY_RTT) {
1352                 snprintf(buf, size, "minrtt=%f;maxrtt=%f;avgrtt=%f;stdevrtt=%f;", stats.minrtt, stats.maxrtt, stats.normdevrtt, stats.stdevrtt);
1353         }
1354
1355         return buf;
1356 }
1357
1358 void ast_rtp_instance_set_stats_vars(struct ast_channel *chan, struct ast_rtp_instance *instance)
1359 {
1360         char quality_buf[AST_MAX_USER_FIELD];
1361         char *quality;
1362         struct ast_channel *bridge = ast_channel_bridge_peer(chan);
1363
1364         ast_channel_lock(chan);
1365         ast_channel_stage_snapshot(chan);
1366         ast_channel_unlock(chan);
1367         if (bridge) {
1368                 ast_channel_lock(bridge);
1369                 ast_channel_stage_snapshot(bridge);
1370                 ast_channel_unlock(bridge);
1371         }
1372
1373         quality = ast_rtp_instance_get_quality(instance, AST_RTP_INSTANCE_STAT_FIELD_QUALITY,
1374                 quality_buf, sizeof(quality_buf));
1375         if (quality) {
1376                 pbx_builtin_setvar_helper(chan, "RTPAUDIOQOS", quality);
1377                 if (bridge) {
1378                         pbx_builtin_setvar_helper(bridge, "RTPAUDIOQOSBRIDGED", quality);
1379                 }
1380         }
1381
1382         quality = ast_rtp_instance_get_quality(instance,
1383                 AST_RTP_INSTANCE_STAT_FIELD_QUALITY_JITTER, quality_buf, sizeof(quality_buf));
1384         if (quality) {
1385                 pbx_builtin_setvar_helper(chan, "RTPAUDIOQOSJITTER", quality);
1386                 if (bridge) {
1387                         pbx_builtin_setvar_helper(bridge, "RTPAUDIOQOSJITTERBRIDGED", quality);
1388                 }
1389         }
1390
1391         quality = ast_rtp_instance_get_quality(instance,
1392                 AST_RTP_INSTANCE_STAT_FIELD_QUALITY_LOSS, quality_buf, sizeof(quality_buf));
1393         if (quality) {
1394                 pbx_builtin_setvar_helper(chan, "RTPAUDIOQOSLOSS", quality);
1395                 if (bridge) {
1396                         pbx_builtin_setvar_helper(bridge, "RTPAUDIOQOSLOSSBRIDGED", quality);
1397                 }
1398         }
1399
1400         quality = ast_rtp_instance_get_quality(instance,
1401                 AST_RTP_INSTANCE_STAT_FIELD_QUALITY_RTT, quality_buf, sizeof(quality_buf));
1402         if (quality) {
1403                 pbx_builtin_setvar_helper(chan, "RTPAUDIOQOSRTT", quality);
1404                 if (bridge) {
1405                         pbx_builtin_setvar_helper(bridge, "RTPAUDIOQOSRTTBRIDGED", quality);
1406                 }
1407         }
1408
1409         ast_channel_lock(chan);
1410         ast_channel_stage_snapshot_done(chan);
1411         ast_channel_unlock(chan);
1412         if (bridge) {
1413                 ast_channel_lock(bridge);
1414                 ast_channel_stage_snapshot_done(bridge);
1415                 ast_channel_unlock(bridge);
1416                 ast_channel_unref(bridge);
1417         }
1418 }
1419
1420 int ast_rtp_instance_set_read_format(struct ast_rtp_instance *instance, struct ast_format *format)
1421 {
1422         return instance->engine->set_read_format ? instance->engine->set_read_format(instance, format) : -1;
1423 }
1424
1425 int ast_rtp_instance_set_write_format(struct ast_rtp_instance *instance, struct ast_format *format)
1426 {
1427         return instance->engine->set_write_format ? instance->engine->set_write_format(instance, format) : -1;
1428 }
1429
1430 int ast_rtp_instance_make_compatible(struct ast_channel *chan, struct ast_rtp_instance *instance, struct ast_channel *peer)
1431 {
1432         struct ast_rtp_glue *glue;
1433         struct ast_rtp_instance *peer_instance = NULL;
1434         int res = -1;
1435
1436         if (!instance->engine->make_compatible) {
1437                 return -1;
1438         }
1439
1440         ast_channel_lock(peer);
1441
1442         if (!(glue = ast_rtp_instance_get_glue(ast_channel_tech(peer)->type))) {
1443                 ast_channel_unlock(peer);
1444                 return -1;
1445         }
1446
1447         glue->get_rtp_info(peer, &peer_instance);
1448         if (!peer_instance) {
1449                 ast_log(LOG_ERROR, "Unable to get_rtp_info for peer type %s\n", glue->type);
1450                 ast_channel_unlock(peer);
1451                 return -1;
1452         }
1453         if (peer_instance->engine != instance->engine) {
1454                 ast_log(LOG_ERROR, "Peer engine mismatch for type %s\n", glue->type);
1455                 ast_channel_unlock(peer);
1456                 ao2_ref(peer_instance, -1);
1457                 return -1;
1458         }
1459
1460         res = instance->engine->make_compatible(chan, instance, peer, peer_instance);
1461
1462         ast_channel_unlock(peer);
1463
1464         ao2_ref(peer_instance, -1);
1465         peer_instance = NULL;
1466
1467         return res;
1468 }
1469
1470 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)
1471 {
1472         if (instance->engine->available_formats) {
1473                 instance->engine->available_formats(instance, to_endpoint, to_asterisk, result);
1474                 if (ast_format_cap_count(result)) {
1475                         return;
1476                 }
1477         }
1478
1479         ast_translate_available_formats(to_endpoint, to_asterisk, result);
1480 }
1481
1482 int ast_rtp_instance_activate(struct ast_rtp_instance *instance)
1483 {
1484         return instance->engine->activate ? instance->engine->activate(instance) : 0;
1485 }
1486
1487 void ast_rtp_instance_stun_request(struct ast_rtp_instance *instance,
1488                                    struct ast_sockaddr *suggestion,
1489                                    const char *username)
1490 {
1491         if (instance->engine->stun_request) {
1492                 instance->engine->stun_request(instance, suggestion, username);
1493         }
1494 }
1495
1496 void ast_rtp_instance_set_timeout(struct ast_rtp_instance *instance, int timeout)
1497 {
1498         instance->timeout = timeout;
1499 }
1500
1501 void ast_rtp_instance_set_hold_timeout(struct ast_rtp_instance *instance, int timeout)
1502 {
1503         instance->holdtimeout = timeout;
1504 }
1505
1506 void ast_rtp_instance_set_keepalive(struct ast_rtp_instance *instance, int interval)
1507 {
1508         instance->keepalive = interval;
1509 }
1510
1511 int ast_rtp_instance_get_timeout(struct ast_rtp_instance *instance)
1512 {
1513         return instance->timeout;
1514 }
1515
1516 int ast_rtp_instance_get_hold_timeout(struct ast_rtp_instance *instance)
1517 {
1518         return instance->holdtimeout;
1519 }
1520
1521 int ast_rtp_instance_get_keepalive(struct ast_rtp_instance *instance)
1522 {
1523         return instance->keepalive;
1524 }
1525
1526 struct ast_rtp_engine *ast_rtp_instance_get_engine(struct ast_rtp_instance *instance)
1527 {
1528         return instance->engine;
1529 }
1530
1531 struct ast_rtp_glue *ast_rtp_instance_get_active_glue(struct ast_rtp_instance *instance)
1532 {
1533         return instance->glue;
1534 }
1535
1536 int ast_rtp_engine_register_srtp(struct ast_srtp_res *srtp_res, struct ast_srtp_policy_res *policy_res)
1537 {
1538         if (res_srtp || res_srtp_policy) {
1539                 return -1;
1540         }
1541         if (!srtp_res || !policy_res) {
1542                 return -1;
1543         }
1544
1545         res_srtp = srtp_res;
1546         res_srtp_policy = policy_res;
1547
1548         return 0;
1549 }
1550
1551 void ast_rtp_engine_unregister_srtp(void)
1552 {
1553         res_srtp = NULL;
1554         res_srtp_policy = NULL;
1555 }
1556
1557 int ast_rtp_engine_srtp_is_registered(void)
1558 {
1559         return res_srtp && res_srtp_policy;
1560 }
1561
1562 int ast_rtp_instance_add_srtp_policy(struct ast_rtp_instance *instance, struct ast_srtp_policy *remote_policy, struct ast_srtp_policy *local_policy)
1563 {
1564         int res = 0;
1565
1566         if (!res_srtp) {
1567                 return -1;
1568         }
1569
1570         if (!instance->srtp) {
1571                 res = res_srtp->create(&instance->srtp, instance, remote_policy);
1572         } else {
1573                 res = res_srtp->replace(&instance->srtp, instance, remote_policy);
1574         }
1575         if (!res) {
1576                 res = res_srtp->add_stream(instance->srtp, local_policy);
1577         }
1578
1579         return res;
1580 }
1581
1582 struct ast_srtp *ast_rtp_instance_get_srtp(struct ast_rtp_instance *instance)
1583 {
1584         return instance->srtp;
1585 }
1586
1587 int ast_rtp_instance_sendcng(struct ast_rtp_instance *instance, int level)
1588 {
1589         if (instance->engine->sendcng) {
1590                 return instance->engine->sendcng(instance, level);
1591         }
1592
1593         return -1;
1594 }
1595
1596 struct ast_rtp_engine_ice *ast_rtp_instance_get_ice(struct ast_rtp_instance *instance)
1597 {
1598         return instance->engine->ice;
1599 }
1600
1601 struct ast_rtp_engine_dtls *ast_rtp_instance_get_dtls(struct ast_rtp_instance *instance)
1602 {
1603         return instance->engine->dtls;
1604 }
1605
1606 int ast_rtp_dtls_cfg_parse(struct ast_rtp_dtls_cfg *dtls_cfg, const char *name, const char *value)
1607 {
1608         if (!strcasecmp(name, "dtlsenable")) {
1609                 dtls_cfg->enabled = ast_true(value) ? 1 : 0;
1610         } else if (!strcasecmp(name, "dtlsverify")) {
1611                 if (!strcasecmp(value, "yes")) {
1612                         dtls_cfg->verify = AST_RTP_DTLS_VERIFY_FINGERPRINT | AST_RTP_DTLS_VERIFY_CERTIFICATE;
1613                 } else if (!strcasecmp(value, "fingerprint")) {
1614                         dtls_cfg->verify = AST_RTP_DTLS_VERIFY_FINGERPRINT;
1615                 } else if (!strcasecmp(value, "certificate")) {
1616                         dtls_cfg->verify = AST_RTP_DTLS_VERIFY_CERTIFICATE;
1617                 } else if (!strcasecmp(value, "no")) {
1618                         dtls_cfg->verify = AST_RTP_DTLS_VERIFY_NONE;
1619                 } else {
1620                         return -1;
1621                 }
1622         } else if (!strcasecmp(name, "dtlsrekey")) {
1623                 if (sscanf(value, "%30u", &dtls_cfg->rekey) != 1) {
1624                         return -1;
1625                 }
1626         } else if (!strcasecmp(name, "dtlscertfile")) {
1627                 ast_free(dtls_cfg->certfile);
1628                 dtls_cfg->certfile = ast_strdup(value);
1629         } else if (!strcasecmp(name, "dtlsprivatekey")) {
1630                 ast_free(dtls_cfg->pvtfile);
1631                 dtls_cfg->pvtfile = ast_strdup(value);
1632         } else if (!strcasecmp(name, "dtlscipher")) {
1633                 ast_free(dtls_cfg->cipher);
1634                 dtls_cfg->cipher = ast_strdup(value);
1635         } else if (!strcasecmp(name, "dtlscafile")) {
1636                 ast_free(dtls_cfg->cafile);
1637                 dtls_cfg->cafile = ast_strdup(value);
1638         } else if (!strcasecmp(name, "dtlscapath") || !strcasecmp(name, "dtlscadir")) {
1639                 ast_free(dtls_cfg->capath);
1640                 dtls_cfg->capath = ast_strdup(value);
1641         } else if (!strcasecmp(name, "dtlssetup")) {
1642                 if (!strcasecmp(value, "active")) {
1643                         dtls_cfg->default_setup = AST_RTP_DTLS_SETUP_ACTIVE;
1644                 } else if (!strcasecmp(value, "passive")) {
1645                         dtls_cfg->default_setup = AST_RTP_DTLS_SETUP_PASSIVE;
1646                 } else if (!strcasecmp(value, "actpass")) {
1647                         dtls_cfg->default_setup = AST_RTP_DTLS_SETUP_ACTPASS;
1648                 }
1649         } else if (!strcasecmp(name, "dtlsfingerprint")) {
1650                 if (!strcasecmp(value, "sha-256")) {
1651                         dtls_cfg->hash = AST_RTP_DTLS_HASH_SHA256;
1652                 } else if (!strcasecmp(value, "sha-1")) {
1653                         dtls_cfg->hash = AST_RTP_DTLS_HASH_SHA1;
1654                 }
1655         } else {
1656                 return -1;
1657         }
1658
1659         return 0;
1660 }
1661
1662 void ast_rtp_dtls_cfg_copy(const struct ast_rtp_dtls_cfg *src_cfg, struct ast_rtp_dtls_cfg *dst_cfg)
1663 {
1664         ast_rtp_dtls_cfg_free(dst_cfg);         /* Prevent a double-call leaking memory via ast_strdup */
1665
1666         dst_cfg->enabled = src_cfg->enabled;
1667         dst_cfg->verify = src_cfg->verify;
1668         dst_cfg->rekey = src_cfg->rekey;
1669         dst_cfg->suite = src_cfg->suite;
1670         dst_cfg->hash = src_cfg->hash;
1671         dst_cfg->certfile = ast_strdup(src_cfg->certfile);
1672         dst_cfg->pvtfile = ast_strdup(src_cfg->pvtfile);
1673         dst_cfg->cipher = ast_strdup(src_cfg->cipher);
1674         dst_cfg->cafile = ast_strdup(src_cfg->cafile);
1675         dst_cfg->capath = ast_strdup(src_cfg->capath);
1676         dst_cfg->default_setup = src_cfg->default_setup;
1677 }
1678
1679 void ast_rtp_dtls_cfg_free(struct ast_rtp_dtls_cfg *dtls_cfg)
1680 {
1681         ast_free(dtls_cfg->certfile);
1682         dtls_cfg->certfile = NULL;
1683         ast_free(dtls_cfg->pvtfile);
1684         dtls_cfg->pvtfile = NULL;
1685         ast_free(dtls_cfg->cipher);
1686         dtls_cfg->cipher = NULL;
1687         ast_free(dtls_cfg->cafile);
1688         dtls_cfg->cafile = NULL;
1689         ast_free(dtls_cfg->capath);
1690         dtls_cfg->capath = NULL;
1691 }
1692
1693 /*! \internal
1694  * \brief Small helper routine that cleans up entry i in
1695  * \c static_RTP_PT.
1696  */
1697 static void rtp_engine_static_RTP_PT_cleanup(int i)
1698 {
1699         ao2_cleanup(static_RTP_PT[i].format);
1700         memset(&static_RTP_PT[i], 0, sizeof(struct ast_rtp_payload_type));
1701 }
1702
1703 /*! \internal
1704  * \brief Small helper routine that cleans up entry i in
1705  * \c ast_rtp_mime_types.
1706  */
1707 static void rtp_engine_mime_type_cleanup(int i)
1708 {
1709         ao2_cleanup(ast_rtp_mime_types[i].payload_type.format);
1710         memset(&ast_rtp_mime_types[i], 0, sizeof(struct ast_rtp_mime_type));
1711 }
1712
1713 static void set_next_mime_type(struct ast_format *format, int rtp_code, const char *type, const char *subtype, unsigned int sample_rate)
1714 {
1715         int x = mime_types_len;
1716         if (ARRAY_LEN(ast_rtp_mime_types) == mime_types_len) {
1717                 return;
1718         }
1719
1720         ast_rwlock_wrlock(&mime_types_lock);
1721         /* Make sure any previous value in ast_rtp_mime_types is cleaned up */
1722         memset(&ast_rtp_mime_types[x], 0, sizeof(struct ast_rtp_mime_type));    
1723         if (format) {
1724                 ast_rtp_mime_types[x].payload_type.asterisk_format = 1;
1725                 ast_rtp_mime_types[x].payload_type.format = ao2_bump(format);
1726         } else {
1727                 ast_rtp_mime_types[x].payload_type.rtp_code = rtp_code;
1728         }
1729         ast_copy_string(ast_rtp_mime_types[x].type, type, sizeof(ast_rtp_mime_types[x].type));
1730         ast_copy_string(ast_rtp_mime_types[x].subtype, subtype, sizeof(ast_rtp_mime_types[x].subtype));
1731         ast_rtp_mime_types[x].sample_rate = sample_rate;
1732         mime_types_len++;
1733         ast_rwlock_unlock(&mime_types_lock);
1734 }
1735
1736 static void add_static_payload(int map, struct ast_format *format, int rtp_code)
1737 {
1738         int x;
1739         ast_rwlock_wrlock(&static_RTP_PT_lock);
1740         if (map < 0) {
1741                 /* find next available dynamic payload slot */
1742                 for (x = 96; x < 127; x++) {
1743                         if (!static_RTP_PT[x].asterisk_format && !static_RTP_PT[x].rtp_code) {
1744                                 map = x;
1745                                 break;
1746                         }
1747                 }
1748         }
1749
1750         if (map < 0) {
1751                 ast_log(LOG_WARNING, "No Dynamic RTP mapping available for format %s\n",
1752                         ast_format_get_name(format));
1753                 ast_rwlock_unlock(&static_RTP_PT_lock);
1754                 return;
1755         }
1756
1757         if (format) {
1758                 static_RTP_PT[map].asterisk_format = 1;
1759                 static_RTP_PT[map].format = ao2_bump(format);
1760         } else {
1761                 static_RTP_PT[map].rtp_code = rtp_code;
1762         }
1763         ast_rwlock_unlock(&static_RTP_PT_lock);
1764 }
1765
1766 int ast_rtp_engine_load_format(struct ast_format *format)
1767 {
1768         char *codec_name = ast_strdupa(ast_format_get_name(format));
1769
1770         codec_name = ast_str_to_upper(codec_name);
1771
1772         set_next_mime_type(format,
1773                 0,
1774                 ast_codec_media_type2str(ast_format_get_type(format)),
1775                 codec_name,
1776                 ast_format_get_sample_rate(format));
1777         add_static_payload(-1, format, 0);
1778
1779         return 0;
1780 }
1781
1782 int ast_rtp_engine_unload_format(struct ast_format *format)
1783 {
1784         int x;
1785         int y = 0;
1786
1787         ast_rwlock_wrlock(&static_RTP_PT_lock);
1788         /* remove everything pertaining to this format id from the lists */
1789         for (x = 0; x < AST_RTP_MAX_PT; x++) {
1790                 if (ast_format_cmp(static_RTP_PT[x].format, format) == AST_FORMAT_CMP_EQUAL) {
1791                         rtp_engine_static_RTP_PT_cleanup(x);
1792                 }
1793         }
1794         ast_rwlock_unlock(&static_RTP_PT_lock);
1795
1796         ast_rwlock_wrlock(&mime_types_lock);
1797         /* rebuild the list skipping the items matching this id */
1798         for (x = 0; x < mime_types_len; x++) {
1799                 if (ast_format_cmp(ast_rtp_mime_types[x].payload_type.format, format) == AST_FORMAT_CMP_EQUAL) {
1800                         rtp_engine_mime_type_cleanup(x);
1801                         continue;
1802                 }
1803                 if (x != y) {
1804                         ast_rtp_mime_types[y] = ast_rtp_mime_types[x];
1805                 }
1806                 y++;
1807         }
1808         mime_types_len = y;
1809         ast_rwlock_unlock(&mime_types_lock);
1810         return 0;
1811 }
1812
1813 /*!
1814  * \internal
1815  * \brief \ref stasis message payload for RTCP messages
1816  */
1817 struct rtcp_message_payload {
1818         struct ast_channel_snapshot *snapshot;  /*< The channel snapshot, if available */
1819         struct ast_rtp_rtcp_report *report;     /*< The RTCP report */
1820         struct ast_json *blob;                  /*< Extra JSON data to publish */
1821 };
1822
1823 static void rtcp_message_payload_dtor(void *obj)
1824 {
1825         struct rtcp_message_payload *payload = obj;
1826
1827         ao2_cleanup(payload->report);
1828         ao2_cleanup(payload->snapshot);
1829         ast_json_unref(payload->blob);
1830 }
1831
1832 static struct ast_manager_event_blob *rtcp_report_to_ami(struct stasis_message *msg)
1833 {
1834         struct rtcp_message_payload *payload = stasis_message_data(msg);
1835         RAII_VAR(struct ast_str *, channel_string, NULL, ast_free);
1836         RAII_VAR(struct ast_str *, packet_string, ast_str_create(512), ast_free);
1837         unsigned int ssrc = payload->report->ssrc;
1838         unsigned int type = payload->report->type;
1839         unsigned int report_count = payload->report->reception_report_count;
1840         int i;
1841
1842         if (!packet_string) {
1843                 return NULL;
1844         }
1845
1846         if (payload->snapshot) {
1847                 channel_string = ast_manager_build_channel_state_string(payload->snapshot);
1848                 if (!channel_string) {
1849                         return NULL;
1850                 }
1851         }
1852
1853         if (payload->blob) {
1854                 /* Optional data */
1855                 struct ast_json *to = ast_json_object_get(payload->blob, "to");
1856                 struct ast_json *from = ast_json_object_get(payload->blob, "from");
1857                 struct ast_json *rtt = ast_json_object_get(payload->blob, "rtt");
1858                 if (to) {
1859                         ast_str_append(&packet_string, 0, "To: %s\r\n", ast_json_string_get(to));
1860                 }
1861                 if (from) {
1862                         ast_str_append(&packet_string, 0, "From: %s\r\n", ast_json_string_get(from));
1863                 }
1864                 if (rtt) {
1865                         ast_str_append(&packet_string, 0, "RTT: %4.4f\r\n", ast_json_real_get(rtt));
1866                 }
1867         }
1868
1869         ast_str_append(&packet_string, 0, "SSRC: 0x%.8x\r\n", ssrc);
1870         ast_str_append(&packet_string, 0, "PT: %u(%s)\r\n", type, type== AST_RTP_RTCP_SR ? "SR" : "RR");
1871         ast_str_append(&packet_string, 0, "ReportCount: %u\r\n", report_count);
1872         if (type == AST_RTP_RTCP_SR) {
1873                 ast_str_append(&packet_string, 0, "SentNTP: %lu.%06lu\r\n",
1874                         (unsigned long)payload->report->sender_information.ntp_timestamp.tv_sec,
1875                         (unsigned long)payload->report->sender_information.ntp_timestamp.tv_usec * 4096);
1876                 ast_str_append(&packet_string, 0, "SentRTP: %u\r\n",
1877                                 payload->report->sender_information.rtp_timestamp);
1878                 ast_str_append(&packet_string, 0, "SentPackets: %u\r\n",
1879                                 payload->report->sender_information.packet_count);
1880                 ast_str_append(&packet_string, 0, "SentOctets: %u\r\n",
1881                                 payload->report->sender_information.octet_count);
1882         }
1883
1884         for (i = 0; i < report_count; i++) {
1885                 RAII_VAR(struct ast_str *, report_string, NULL, ast_free);
1886
1887                 if (!payload->report->report_block[i]) {
1888                         break;
1889                 }
1890
1891                 report_string = ast_str_create(256);
1892                 if (!report_string) {
1893                         return NULL;
1894                 }
1895
1896                 ast_str_append(&report_string, 0, "Report%dSourceSSRC: 0x%.8x\r\n",
1897                                 i, payload->report->report_block[i]->source_ssrc);
1898                 ast_str_append(&report_string, 0, "Report%dFractionLost: %d\r\n",
1899                                 i, payload->report->report_block[i]->lost_count.fraction);
1900                 ast_str_append(&report_string, 0, "Report%dCumulativeLost: %u\r\n",
1901                                 i, payload->report->report_block[i]->lost_count.packets);
1902                 ast_str_append(&report_string, 0, "Report%dHighestSequence: %u\r\n",
1903                                 i, payload->report->report_block[i]->highest_seq_no & 0xffff);
1904                 ast_str_append(&report_string, 0, "Report%dSequenceNumberCycles: %u\r\n",
1905                                 i, payload->report->report_block[i]->highest_seq_no >> 16);
1906                 ast_str_append(&report_string, 0, "Report%dIAJitter: %u\r\n",
1907                                 i, payload->report->report_block[i]->ia_jitter);
1908                 ast_str_append(&report_string, 0, "Report%dLSR: %u\r\n",
1909                                 i, payload->report->report_block[i]->lsr);
1910                 ast_str_append(&report_string, 0, "Report%dDLSR: %4.4f\r\n",
1911                                 i, ((double)payload->report->report_block[i]->dlsr) / 65536);
1912                 ast_str_append(&packet_string, 0, "%s", ast_str_buffer(report_string));
1913         }
1914
1915         return ast_manager_event_blob_create(EVENT_FLAG_REPORTING,
1916                 stasis_message_type(msg) == ast_rtp_rtcp_received_type() ? "RTCPReceived" : "RTCPSent",
1917                 "%s%s",
1918                 AS_OR(channel_string, ""),
1919                 ast_str_buffer(packet_string));
1920 }
1921
1922 static struct ast_json *rtcp_report_to_json(struct stasis_message *msg,
1923         const struct stasis_message_sanitizer *sanitize)
1924 {
1925         struct rtcp_message_payload *payload = stasis_message_data(msg);
1926         RAII_VAR(struct ast_json *, json_rtcp_report, NULL, ast_json_unref);
1927         RAII_VAR(struct ast_json *, json_rtcp_report_blocks, NULL, ast_json_unref);
1928         RAII_VAR(struct ast_json *, json_rtcp_sender_info, NULL, ast_json_unref);
1929         RAII_VAR(struct ast_json *, json_channel, NULL, ast_json_unref);
1930         int i;
1931
1932         json_rtcp_report_blocks = ast_json_array_create();
1933         if (!json_rtcp_report_blocks) {
1934                 return NULL;
1935         }
1936
1937         for (i = 0; i < payload->report->reception_report_count && payload->report->report_block[i]; i++) {
1938                 struct ast_json *json_report_block;
1939                 char str_lsr[32];
1940                 snprintf(str_lsr, sizeof(str_lsr), "%u", payload->report->report_block[i]->lsr);
1941                 json_report_block = ast_json_pack("{s: i, s: i, s: i, s: i, s: i, s: s, s: i}",
1942                                 "source_ssrc", payload->report->report_block[i]->source_ssrc,
1943                                 "fraction_lost", payload->report->report_block[i]->lost_count.fraction,
1944                                 "packets_lost", payload->report->report_block[i]->lost_count.packets,
1945                                 "highest_seq_no", payload->report->report_block[i]->highest_seq_no,
1946                                 "ia_jitter", payload->report->report_block[i]->ia_jitter,
1947                                 "lsr", str_lsr,
1948                                 "dlsr", payload->report->report_block[i]->dlsr);
1949                 if (!json_report_block) {
1950                         return NULL;
1951                 }
1952
1953                 if (ast_json_array_append(json_rtcp_report_blocks, json_report_block)) {
1954                         return NULL;
1955                 }
1956         }
1957
1958         if (payload->report->type == AST_RTP_RTCP_SR) {
1959                 char sec[32];
1960                 char usec[32];
1961                 snprintf(sec, sizeof(sec), "%lu", (unsigned long)payload->report->sender_information.ntp_timestamp.tv_sec);
1962                 snprintf(usec, sizeof(usec), "%lu", (unsigned long)payload->report->sender_information.ntp_timestamp.tv_usec);
1963                 json_rtcp_sender_info = ast_json_pack("{s: s, s: s, s: i, s: i, s: i}",
1964                                 "ntp_timestamp_sec", sec,
1965                                 "ntp_timestamp_usec", usec,
1966                                 "rtp_timestamp", payload->report->sender_information.rtp_timestamp,
1967                                 "packets", payload->report->sender_information.packet_count,
1968                                 "octets", payload->report->sender_information.octet_count);
1969                 if (!json_rtcp_sender_info) {
1970                         return NULL;
1971                 }
1972         }
1973
1974         json_rtcp_report = ast_json_pack("{s: i, s: i, s: i, s: O, s: O}",
1975                         "ssrc", payload->report->ssrc,
1976                         "type", payload->report->type,
1977                         "report_count", payload->report->reception_report_count,
1978                         "sender_information", json_rtcp_sender_info ? json_rtcp_sender_info : ast_json_null(),
1979                         "report_blocks", json_rtcp_report_blocks);
1980         if (!json_rtcp_report) {
1981                 return NULL;
1982         }
1983
1984         if (payload->snapshot) {
1985                 json_channel = ast_channel_snapshot_to_json(payload->snapshot, sanitize);
1986                 if (!json_channel) {
1987                         return NULL;
1988                 }
1989         }
1990
1991         return ast_json_pack("{s: O, s: O, s: O}",
1992                 "channel", payload->snapshot ? json_channel : ast_json_null(),
1993                 "rtcp_report", json_rtcp_report,
1994                 "blob", payload->blob);
1995 }
1996
1997 static void rtp_rtcp_report_dtor(void *obj)
1998 {
1999         int i;
2000         struct ast_rtp_rtcp_report *rtcp_report = obj;
2001
2002         for (i = 0; i < rtcp_report->reception_report_count; i++) {
2003                 ast_free(rtcp_report->report_block[i]);
2004         }
2005 }
2006
2007 struct ast_rtp_rtcp_report *ast_rtp_rtcp_report_alloc(unsigned int report_blocks)
2008 {
2009         struct ast_rtp_rtcp_report *rtcp_report;
2010
2011         /* Size of object is sizeof the report + the number of report_blocks * sizeof pointer */
2012         rtcp_report = ao2_alloc((sizeof(*rtcp_report) + report_blocks * sizeof(struct ast_rtp_rtcp_report_block *)),
2013                 rtp_rtcp_report_dtor);
2014
2015         return rtcp_report;
2016 }
2017
2018 void ast_rtp_publish_rtcp_message(struct ast_rtp_instance *rtp,
2019                 struct stasis_message_type *message_type,
2020                 struct ast_rtp_rtcp_report *report,
2021                 struct ast_json *blob)
2022 {
2023         RAII_VAR(struct rtcp_message_payload *, payload, NULL, ao2_cleanup);
2024         RAII_VAR(struct stasis_message *, message, NULL, ao2_cleanup);
2025
2026         if (!message_type) {
2027                 return;
2028         }
2029
2030         payload = ao2_alloc(sizeof(*payload), rtcp_message_payload_dtor);
2031         if (!payload || !report) {
2032                 return;
2033         }
2034
2035         if (!ast_strlen_zero(rtp->channel_uniqueid)) {
2036                 payload->snapshot = ast_channel_snapshot_get_latest(rtp->channel_uniqueid);
2037         }
2038         if (blob) {
2039                 payload->blob = blob;
2040                 ast_json_ref(blob);
2041         }
2042         ao2_ref(report, +1);
2043         payload->report = report;
2044
2045         message = stasis_message_create(message_type, payload);
2046         if (!message) {
2047                 return;
2048         }
2049
2050         stasis_publish(ast_rtp_topic(), message);
2051 }
2052
2053 /*!
2054  * @{ \brief Define RTCP/RTP message types.
2055  */
2056 STASIS_MESSAGE_TYPE_DEFN(ast_rtp_rtcp_sent_type,
2057                 .to_ami = rtcp_report_to_ami,
2058                 .to_json = rtcp_report_to_json,);
2059 STASIS_MESSAGE_TYPE_DEFN(ast_rtp_rtcp_received_type,
2060                 .to_ami = rtcp_report_to_ami,
2061                 .to_json = rtcp_report_to_json,);
2062 /*! @} */
2063
2064 struct stasis_topic *ast_rtp_topic(void)
2065 {
2066         return rtp_topic;
2067 }
2068
2069 static void rtp_engine_shutdown(void)
2070 {
2071         int x;
2072
2073         ao2_cleanup(rtp_topic);
2074         rtp_topic = NULL;
2075         STASIS_MESSAGE_TYPE_CLEANUP(ast_rtp_rtcp_received_type);
2076         STASIS_MESSAGE_TYPE_CLEANUP(ast_rtp_rtcp_sent_type);
2077
2078         ast_rwlock_wrlock(&static_RTP_PT_lock);
2079         for (x = 0; x < AST_RTP_MAX_PT; x++) {
2080                 if (static_RTP_PT[x].format) {
2081                         rtp_engine_static_RTP_PT_cleanup(x);
2082                 }
2083         }
2084         ast_rwlock_unlock(&static_RTP_PT_lock);
2085
2086         ast_rwlock_wrlock(&mime_types_lock);
2087         for (x = 0; x < mime_types_len; x++) {
2088                 if (ast_rtp_mime_types[x].payload_type.format) {
2089                         rtp_engine_mime_type_cleanup(x);
2090                 }
2091         }
2092         ast_rwlock_unlock(&mime_types_lock);
2093 }
2094
2095 int ast_rtp_engine_init()
2096 {
2097         ast_rwlock_init(&mime_types_lock);
2098         ast_rwlock_init(&static_RTP_PT_lock);
2099
2100         rtp_topic = stasis_topic_create("rtp_topic");
2101         if (!rtp_topic) {
2102                 return -1;
2103         }
2104         STASIS_MESSAGE_TYPE_INIT(ast_rtp_rtcp_sent_type);
2105         STASIS_MESSAGE_TYPE_INIT(ast_rtp_rtcp_received_type);
2106         ast_register_cleanup(rtp_engine_shutdown);
2107
2108         /* Define all the RTP mime types available */
2109         set_next_mime_type(ast_format_g723, 0, "audio", "G723", 8000);
2110         set_next_mime_type(ast_format_gsm, 0, "audio", "GSM", 8000);
2111         set_next_mime_type(ast_format_ulaw, 0, "audio", "PCMU", 8000);
2112         set_next_mime_type(ast_format_ulaw, 0, "audio", "G711U", 8000);
2113         set_next_mime_type(ast_format_alaw, 0, "audio", "PCMA", 8000);
2114         set_next_mime_type(ast_format_alaw, 0, "audio", "G711A", 8000);
2115         set_next_mime_type(ast_format_g726, 0, "audio", "G726-32", 8000);
2116         set_next_mime_type(ast_format_adpcm, 0, "audio", "DVI4", 8000);
2117         set_next_mime_type(ast_format_slin, 0, "audio", "L16", 8000);
2118         set_next_mime_type(ast_format_slin16, 0, "audio", "L16", 16000);
2119         set_next_mime_type(ast_format_slin16, 0, "audio", "L16-256", 16000);
2120         set_next_mime_type(ast_format_slin12, 0, "audio", "L16", 12000);
2121         set_next_mime_type(ast_format_slin24, 0, "audio", "L16", 24000);
2122         set_next_mime_type(ast_format_slin32, 0, "audio", "L16", 32000);
2123         set_next_mime_type(ast_format_slin44, 0, "audio", "L16", 44000);
2124         set_next_mime_type(ast_format_slin48, 0, "audio", "L16", 48000);
2125         set_next_mime_type(ast_format_slin96, 0, "audio", "L16", 96000);
2126         set_next_mime_type(ast_format_slin192, 0, "audio", "L16", 192000);
2127         set_next_mime_type(ast_format_lpc10, 0, "audio", "LPC", 8000);
2128         set_next_mime_type(ast_format_g729, 0, "audio", "G729", 8000);
2129         set_next_mime_type(ast_format_g729, 0, "audio", "G729A", 8000);
2130         set_next_mime_type(ast_format_g729, 0, "audio", "G.729", 8000);
2131         set_next_mime_type(ast_format_speex, 0, "audio", "speex", 8000);
2132         set_next_mime_type(ast_format_speex16, 0,  "audio", "speex", 16000);
2133         set_next_mime_type(ast_format_speex32, 0,  "audio", "speex", 32000);
2134         set_next_mime_type(ast_format_ilbc, 0, "audio", "iLBC", 8000);
2135         /* this is the sample rate listed in the RTP profile for the G.722 codec, *NOT* the actual sample rate of the media stream */
2136         set_next_mime_type(ast_format_g722, 0, "audio", "G722", 8000);
2137         set_next_mime_type(ast_format_g726_aal2, 0, "audio", "AAL2-G726-32", 8000);
2138         set_next_mime_type(NULL, AST_RTP_DTMF, "audio", "telephone-event", 8000);
2139         set_next_mime_type(NULL, AST_RTP_CISCO_DTMF, "audio", "cisco-telephone-event", 8000);
2140         set_next_mime_type(NULL, AST_RTP_CN, "audio", "CN", 8000);
2141         set_next_mime_type(ast_format_jpeg, 0, "video", "JPEG", 90000);
2142         set_next_mime_type(ast_format_png, 0, "video", "PNG", 90000);
2143         set_next_mime_type(ast_format_h261, 0, "video", "H261", 90000);
2144         set_next_mime_type(ast_format_h263, 0, "video", "H263", 90000);
2145         set_next_mime_type(ast_format_h263p, 0, "video", "h263-1998", 90000);
2146         set_next_mime_type(ast_format_h264, 0, "video", "H264", 90000);
2147         set_next_mime_type(ast_format_mp4, 0, "video", "MP4V-ES", 90000);
2148         set_next_mime_type(ast_format_t140_red, 0, "text", "RED", 1000);
2149         set_next_mime_type(ast_format_t140, 0, "text", "T140", 1000);
2150         set_next_mime_type(ast_format_siren7, 0, "audio", "G7221", 16000);
2151         set_next_mime_type(ast_format_siren14, 0, "audio", "G7221", 32000);
2152         set_next_mime_type(ast_format_g719, 0, "audio", "G719", 48000);
2153         /* Opus and VP8 */
2154         set_next_mime_type(ast_format_opus, 0,  "audio", "opus", 48000);
2155         set_next_mime_type(ast_format_vp8, 0,  "video", "VP8", 90000);
2156
2157         /* Define the static rtp payload mappings */
2158         add_static_payload(0, ast_format_ulaw, 0);
2159         #ifdef USE_DEPRECATED_G726
2160         add_static_payload(2, ast_format_g726, 0);/* Technically this is G.721, but if Cisco can do it, so can we... */
2161         #endif
2162         add_static_payload(3, ast_format_gsm, 0);
2163         add_static_payload(4, ast_format_g723, 0);
2164         add_static_payload(5, ast_format_adpcm, 0);/* 8 kHz */
2165         add_static_payload(6, ast_format_adpcm, 0); /* 16 kHz */
2166         add_static_payload(7, ast_format_lpc10, 0);
2167         add_static_payload(8, ast_format_alaw, 0);
2168         add_static_payload(9, ast_format_g722, 0);
2169         add_static_payload(10, ast_format_slin, 0); /* 2 channels */
2170         add_static_payload(11, ast_format_slin, 0); /* 1 channel */
2171         add_static_payload(13, NULL, AST_RTP_CN);
2172         add_static_payload(16, ast_format_adpcm, 0); /* 11.025 kHz */
2173         add_static_payload(17, ast_format_adpcm, 0); /* 22.050 kHz */
2174         add_static_payload(18, ast_format_g729, 0);
2175         add_static_payload(19, NULL, AST_RTP_CN);         /* Also used for CN */
2176         add_static_payload(26, ast_format_jpeg, 0);
2177         add_static_payload(31, ast_format_h261, 0);
2178         add_static_payload(34, ast_format_h263, 0);
2179         add_static_payload(97, ast_format_ilbc, 0);
2180         add_static_payload(98, ast_format_h263p, 0);
2181         add_static_payload(99, ast_format_h264, 0);
2182         add_static_payload(101, NULL, AST_RTP_DTMF);
2183         add_static_payload(102, ast_format_siren7, 0);
2184         add_static_payload(103, ast_format_h263p, 0);
2185         add_static_payload(104, ast_format_mp4, 0);
2186         add_static_payload(105, ast_format_t140_red, 0);   /* Real time text chat (with redundancy encoding) */
2187         add_static_payload(106, ast_format_t140, 0);     /* Real time text chat */
2188         add_static_payload(110, ast_format_speex, 0);
2189         add_static_payload(111, ast_format_g726, 0);
2190         add_static_payload(112, ast_format_g726_aal2, 0);
2191         add_static_payload(115, ast_format_siren14, 0);
2192         add_static_payload(116, ast_format_g719, 0);
2193         add_static_payload(117, ast_format_speex16, 0);
2194         add_static_payload(118, ast_format_slin16, 0); /* 16 Khz signed linear */
2195         add_static_payload(119, ast_format_speex32, 0);
2196         add_static_payload(121, NULL, AST_RTP_CISCO_DTMF);   /* Must be type 121 */
2197         add_static_payload(122, ast_format_slin12, 0);
2198         add_static_payload(123, ast_format_slin24, 0);
2199         add_static_payload(124, ast_format_slin32, 0);
2200         add_static_payload(125, ast_format_slin44, 0);
2201         add_static_payload(126, ast_format_slin48, 0);
2202         add_static_payload(127, ast_format_slin96, 0);
2203         /* payload types above 127 are not valid */
2204         add_static_payload(96, ast_format_slin192, 0);
2205         /* Opus and VP8 */
2206         add_static_payload(100, ast_format_vp8, 0);
2207         add_static_payload(107, ast_format_opus, 0);
2208
2209         return 0;
2210 }
2211
2212
2213 time_t ast_rtp_instance_get_last_tx(const struct ast_rtp_instance *rtp)
2214 {
2215         return rtp->last_tx;
2216 }
2217
2218 void ast_rtp_instance_set_last_tx(struct ast_rtp_instance *rtp, time_t time)
2219 {
2220         rtp->last_tx = time;
2221 }