Asterisk - The Open Source Telephony Project  GIT-master-a24979a
bridge_channel.c
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1 /*
2  * Asterisk -- An open source telephony toolkit.
3  *
4  * Copyright (C) 2007 - 2009, 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 Bridging Channel API
22  *
23  * \author Joshua Colp <jcolp@digium.com>
24  * \author Richard Mudgett <rmudgett@digium.com>
25  * \author Matt Jordan <mjordan@digium.com>
26  *
27  */
28 
29 /*** MODULEINFO
30  <support_level>core</support_level>
31  ***/
32 
33 #include "asterisk.h"
34 
35 #include <signal.h>
36 
37 #include "asterisk/heap.h"
38 #include "asterisk/alertpipe.h"
39 #include "asterisk/astobj2.h"
40 #include "asterisk/stringfields.h"
41 #include "asterisk/app.h"
42 #include "asterisk/pbx.h"
43 #include "asterisk/channel.h"
44 #include "asterisk/timing.h"
45 #include "asterisk/bridge.h"
47 #include "asterisk/bridge_after.h"
52 #include "asterisk/musiconhold.h"
54 #include "asterisk/parking.h"
55 #include "asterisk/causes.h"
56 #include "asterisk/test.h"
57 #include "asterisk/sem.h"
58 #include "asterisk/stream.h"
59 #include "asterisk/message.h"
60 #include "asterisk/core_local.h"
61 
62 /*!
63  * \brief Used to queue an action frame onto a bridge channel and write an action frame into a bridge.
64  * \since 12.0.0
65  *
66  * \param bridge_channel Which channel work with.
67  * \param action Type of bridge action frame.
68  * \param data Frame payload data to pass.
69  * \param datalen Frame payload data length to pass.
70  *
71  * \retval 0 on success.
72  * \retval -1 on error.
73  */
74 typedef int (*ast_bridge_channel_post_action_data)(struct ast_bridge_channel *bridge_channel, enum bridge_channel_action_type action, const void *data, size_t datalen);
75 
76 /*!
77  * \brief Counter used for assigning synchronous bridge action IDs
78  */
79 static int sync_ids;
80 
81 /*!
82  * \brief Frame payload for synchronous bridge actions.
83  *
84  * The payload serves as a wrapper around the actual payload of the
85  * frame, with the addition of an id used to find the associated
86  * bridge_sync object.
87  */
88 struct sync_payload {
89  /*! Unique ID for this synchronous action */
90  unsigned int id;
91  /*! Actual frame data to process */
92  unsigned char data[0];
93 };
94 
95 /*!
96  * \brief Synchronous bridge action object.
97  *
98  * Synchronous bridge actions require the ability for one thread to wait
99  * and for another thread to indicate that the action has completed. This
100  * structure facilitates that goal by providing synchronization structures.
101  */
102 struct bridge_sync {
103  /*! Unique ID of this synchronization object. Corresponds with ID in synchronous frame payload */
104  unsigned int id;
105  /*! Semaphore used for synchronization */
106  struct ast_sem sem;
107  /*! Pointer to next entry in the list */
109 };
110 
111 /*!
112  * \brief List holding active synchronous action objects.
113  */
115 
116 /*!
117  * \brief Initialize a synchronous bridge object.
118  *
119  * This both initializes the structure and adds it to the list of
120  * synchronization structures.
121  *
122  * \param sync_struct The synchronization object to initialize.
123  * \param id ID to assign to the synchronization object.
124  */
125 static void bridge_sync_init(struct bridge_sync *sync_struct, unsigned int id)
126 {
127  memset(sync_struct, 0, sizeof(*sync_struct));
128  sync_struct->id = id;
129  ast_sem_init(&sync_struct->sem, 0, 0);
130 
132  AST_RWLIST_INSERT_TAIL(&sync_structs, sync_struct, list);
134 }
135 
136 /*!
137  * \brief Clean up a synchronization bridge object.
138  *
139  * This frees fields within the synchronization object and removes
140  * it from the list of active synchronization objects.
141  *
142  * Since synchronization objects are stack-allocated, it is vital
143  * that this is called before the synchronization object goes
144  * out of scope.
145  *
146  * \param sync_struct Synchronization object to clean up.
147  */
148 static void bridge_sync_cleanup(struct bridge_sync *sync_struct)
149 {
150  struct bridge_sync *iter;
151 
154  if (iter->id == sync_struct->id) {
156  break;
157  }
158  }
161 
162  ast_sem_destroy(&sync_struct->sem);
163 }
164 
165 /*!
166  * \brief Failsafe for synchronous bridge action waiting.
167  *
168  * When waiting for a synchronous bridge action to complete,
169  * if there is a frame resource leak somewhere, it is possible
170  * that we will never get notified that the synchronous action
171  * completed.
172  *
173  * If a significant amount of time passes, then we will abandon
174  * waiting for the synchrnous bridge action to complete.
175  *
176  * This constant represents the number of milliseconds we will
177  * wait for the bridge action to complete.
178  */
179 #define PLAYBACK_TIMEOUT (600 * 1000)
180 
181 /*!
182  * \brief Wait for a synchronous bridge action to complete.
183  *
184  * \param sync_struct Synchronization object corresponding to the bridge action.
185  */
186 static void bridge_sync_wait(struct bridge_sync *sync_struct)
187 {
188  struct timeval timeout_val = ast_tvadd(ast_tvnow(), ast_samp2tv(PLAYBACK_TIMEOUT, 1000));
189  struct timespec timeout_spec = {
190  .tv_sec = timeout_val.tv_sec,
191  .tv_nsec = timeout_val.tv_usec * 1000,
192  };
193 
194  ast_sem_timedwait(&sync_struct->sem, &timeout_spec);
195 }
196 
197 /*!
198  * \brief Signal that waiting for a synchronous bridge action is no longer necessary.
199  *
200  * This may occur for several reasons
201  * \li The synchronous bridge action has completed.
202  * \li The bridge channel has been removed from the bridge.
203  * \li The synchronous bridge action could not be queued.
204  *
205  * \param sync_struct Synchronization object corresponding to the bridge action.
206  */
207 static void bridge_sync_signal(struct bridge_sync *sync_struct)
208 {
209  ast_sem_post(&sync_struct->sem);
210 }
211 
213 {
214  struct ast_channel *chan;
215 
217  chan = ao2_bump(bridge_channel->chan);
219 
220  return chan;
221 }
222 
224 {
225  struct ast_bridge *bridge;
226 
227  for (;;) {
228  /* Safely get the bridge pointer */
229  ast_bridge_channel_lock(bridge_channel);
230  bridge = bridge_channel->bridge;
231  ao2_ref(bridge, +1);
232  ast_bridge_channel_unlock(bridge_channel);
233 
234  /* Lock the bridge and see if it is still the bridge we need to lock. */
235  ast_bridge_lock(bridge);
236  if (bridge == bridge_channel->bridge) {
237  ao2_ref(bridge, -1);
238  return;
239  }
240  ast_bridge_unlock(bridge);
241  ao2_ref(bridge, -1);
242  }
243 }
244 
245 int ast_bridge_channel_notify_talking(struct ast_bridge_channel *bridge_channel, int started_talking)
246 {
247  struct ast_frame action = {
249  .subclass.integer = started_talking
251  };
252 
253  return ast_bridge_channel_queue_frame(bridge_channel, &action);
254 }
255 
256 /*!
257  * \internal
258  * \brief Poke the bridge_channel thread
259  */
260 static void bridge_channel_poke(struct ast_bridge_channel *bridge_channel)
261 {
262  if (!pthread_equal(pthread_self(), bridge_channel->thread)) {
263  /* Wake up the bridge channel thread. */
264  ast_queue_frame(bridge_channel->chan, &ast_null_frame);
265  }
266 }
267 
268 /*!
269  * \internal
270  * \brief Set actual cause on channel.
271  * \since 12.0.0
272  *
273  * \param chan Channel to set cause.
274  * \param cause Cause to set on channel.
275  * If cause <= 0 then use cause on channel if cause still <= 0 use AST_CAUSE_NORMAL_CLEARING.
276  *
277  * \return Actual cause set on channel.
278  */
279 static int channel_set_cause(struct ast_channel *chan, int cause)
280 {
281  ast_channel_lock(chan);
282  if (cause <= 0) {
283  cause = ast_channel_hangupcause(chan);
284  if (cause <= 0) {
286  }
287  }
288  ast_channel_hangupcause_set(chan, cause);
289  ast_channel_unlock(chan);
290  return cause;
291 }
292 
293 void ast_bridge_channel_leave_bridge_nolock(struct ast_bridge_channel *bridge_channel, enum bridge_channel_state new_state, int cause)
294 {
295  if (bridge_channel->state != BRIDGE_CHANNEL_STATE_WAIT) {
296  return;
297  }
298 
299  ast_debug(1, "Setting %p(%s) state from:%u to:%u\n",
300  bridge_channel, ast_channel_name(bridge_channel->chan), bridge_channel->state,
301  new_state);
302 
303  channel_set_cause(bridge_channel->chan, cause);
304 
305  ast_channel_lock(bridge_channel->chan);
306  ast_bridge_vars_set(bridge_channel->chan, NULL, NULL);
307  ast_channel_unlock(bridge_channel->chan);
308 
309  /* Change the state on the bridge channel */
310  bridge_channel->state = new_state;
311 
312  bridge_channel_poke(bridge_channel);
313 }
314 
315 void ast_bridge_channel_leave_bridge(struct ast_bridge_channel *bridge_channel, enum bridge_channel_state new_state, int cause)
316 {
317  ast_bridge_channel_lock(bridge_channel);
318  ast_bridge_channel_leave_bridge_nolock(bridge_channel, new_state, cause);
319  ast_bridge_channel_unlock(bridge_channel);
320 }
321 
323 {
324  struct ast_bridge *bridge = bridge_channel->bridge;
325  struct ast_bridge_channel *other = NULL;
326 
327  if (bridge_channel->in_bridge && bridge->num_channels == 2) {
329  if (other != bridge_channel) {
330  break;
331  }
332  }
333  }
334 
335  return other;
336 }
337 
339 {
340  ast_assert(bridge_channel->read_format != NULL);
341  ast_assert(bridge_channel->write_format != NULL);
342 
343  ast_channel_lock(bridge_channel->chan);
344 
345  /* Restore original formats of the channel as they came in */
346  if (ast_format_cmp(ast_channel_readformat(bridge_channel->chan), bridge_channel->read_format) == AST_FORMAT_CMP_NOT_EQUAL) {
347  ast_debug(1, "Bridge is returning %p(%s) to read format %s\n",
348  bridge_channel, ast_channel_name(bridge_channel->chan),
349  ast_format_get_name(bridge_channel->read_format));
350  if (ast_set_read_format(bridge_channel->chan, bridge_channel->read_format)) {
351  ast_debug(1, "Bridge failed to return %p(%s) to read format %s\n",
352  bridge_channel, ast_channel_name(bridge_channel->chan),
353  ast_format_get_name(bridge_channel->read_format));
354  }
355  }
356  if (ast_format_cmp(ast_channel_writeformat(bridge_channel->chan), bridge_channel->write_format) == AST_FORMAT_CMP_NOT_EQUAL) {
357  ast_debug(1, "Bridge is returning %p(%s) to write format %s\n",
358  bridge_channel, ast_channel_name(bridge_channel->chan),
359  ast_format_get_name(bridge_channel->write_format));
360  if (ast_set_write_format(bridge_channel->chan, bridge_channel->write_format)) {
361  ast_debug(1, "Bridge failed to return %p(%s) to write format %s\n",
362  bridge_channel, ast_channel_name(bridge_channel->chan),
363  ast_format_get_name(bridge_channel->write_format));
364  }
365  }
366 
367  ast_channel_unlock(bridge_channel->chan);
368 }
369 
371 {
372  struct ast_bridge *bridge;
373 
374  ast_bridge_channel_lock_bridge(bridge_channel);
375  bridge = bridge_channel->bridge;
376  ao2_ref(bridge, +1);
378  ast_bridge_unlock(bridge);
379  return bridge;
380 }
381 
383 {
384  struct ast_bridge_channel *other;
385  struct ast_bridge *bridge = bridge_channel->bridge;
386  struct ast_channel *oldest_linkedid_chan = bridge_channel->chan;
387 
389  if (other == swap) {
390  continue;
391  }
392  oldest_linkedid_chan = ast_channel_internal_oldest_linkedid(
393  oldest_linkedid_chan, other->chan);
394  }
395 
400  if (other == swap) {
401  continue;
402  }
403  ast_channel_lock(other->chan);
404  ast_channel_internal_copy_linkedid(other->chan, oldest_linkedid_chan);
405  ast_channel_unlock(other->chan);
406  }
407 }
408 
409 /*!
410  * \internal
411  * \brief Set dest's empty peeraccount with the src's non-empty accountcode.
412  * \since 12.5.0
413  *
414  * \param dest Channel to update peeraccount.
415  * \param src Channel to get accountcode from.
416  *
417  * \note Both channels are already locked.
418  */
419 static void channel_fill_empty_peeraccount(struct ast_channel *dest, struct ast_channel *src)
420 {
423  ast_debug(1, "Setting channel %s peeraccount with channel %s accountcode '%s'.\n",
424  ast_channel_name(dest),
426  ast_channel_peeraccount_set(dest, ast_channel_accountcode(src));
427  }
428 }
429 
430 /*!
431  * \internal
432  * \brief Set dest's empty accountcode with the src's non-empty peeraccount.
433  * \since 12.5.0
434  *
435  * \param dest Channel to update accountcode.
436  * \param src Channel to get peeraccount from.
437  *
438  * \note Both channels are already locked.
439  */
440 static void channel_fill_empty_accountcode(struct ast_channel *dest, struct ast_channel *src)
441 {
444  ast_debug(1, "Setting channel %s accountcode with channel %s peeraccount '%s'.\n",
445  ast_channel_name(dest),
447  ast_channel_accountcode_set(dest, ast_channel_peeraccount(src));
448  }
449 }
450 
451 /*!
452  * \internal
453  * \brief Set empty peeraccount and accountcode in a channel from the other channel.
454  * \since 12.5.0
455  *
456  * \param c0 First bridge channel to update.
457  * \param c1 Second bridge channel to update.
458  *
459  * \note Both channels are already locked.
460  */
461 static void channel_set_empty_accountcodes(struct ast_channel *c0, struct ast_channel *c1)
462 {
463  /* Set empty peeraccount from the other channel's accountcode. */
466 
467  /* Set empty accountcode from the other channel's peeraccount. */
470 }
471 
472 /*!
473  * \internal
474  * \brief Update dest's peeraccount with the src's different accountcode.
475  * \since 12.5.0
476  *
477  * \param dest Channel to update peeraccount.
478  * \param src Channel to get accountcode from.
479  *
480  * \note Both channels are already locked.
481  */
482 static void channel_update_peeraccount(struct ast_channel *dest, struct ast_channel *src)
483 {
484  if (strcmp(ast_channel_accountcode(src), ast_channel_peeraccount(dest))) {
485  ast_debug(1, "Changing channel %s peeraccount '%s' to match channel %s accountcode '%s'.\n",
488  ast_channel_peeraccount_set(dest, ast_channel_accountcode(src));
489  }
490 }
491 
492 /*!
493  * \internal
494  * \brief Update peeraccounts to match the other channel's accountcode.
495  * \since 12.5.0
496  *
497  * \param c0 First channel to update.
498  * \param c1 Second channel to update.
499  *
500  * \note Both channels are already locked.
501  */
502 static void channel_update_peeraccounts(struct ast_channel *c0, struct ast_channel *c1)
503 {
506 }
507 
508 /*!
509  * \internal
510  * \brief Update channel accountcodes because a channel is joining a bridge.
511  * \since 12.5.0
512  *
513  * \param joining Channel joining the bridge.
514  * \param swap Channel being replaced by the joining channel. May be NULL.
515  *
516  * \note The bridge must be locked prior to calling this function.
517  */
519 {
520  struct ast_bridge *bridge = joining->bridge;
521  struct ast_bridge_channel *other;
522  unsigned int swap_in_bridge = 0;
523  unsigned int will_be_two_party;
524 
525  /*
526  * Only update the peeraccount to match if the joining channel
527  * will make it a two party bridge.
528  */
529  if (bridge->num_channels <= 2 && swap) {
531  if (other == swap) {
532  swap_in_bridge = 1;
533  break;
534  }
535  }
536  }
537  will_be_two_party = (1 == bridge->num_channels - swap_in_bridge);
538 
540  if (other == swap) {
541  continue;
542  }
543  ast_assert(joining != other);
544  ast_channel_lock_both(joining->chan, other->chan);
545  channel_set_empty_accountcodes(joining->chan, other->chan);
546  if (will_be_two_party) {
547  channel_update_peeraccounts(joining->chan, other->chan);
548  }
549  ast_channel_unlock(joining->chan);
550  ast_channel_unlock(other->chan);
551  }
552 }
553 
554 /*!
555  * \internal
556  * \brief Update channel peeraccount codes because a channel has left a bridge.
557  * \since 12.5.0
558  *
559  * \param leaving Channel leaving the bridge. (Has already been removed actually)
560  *
561  * \note The bridge must be locked prior to calling this function.
562  */
564 {
565  struct ast_bridge *bridge = leaving->bridge;
566  struct ast_bridge_channel *first;
567  struct ast_bridge_channel *second;
568 
569  if (bridge->num_channels != 2 || bridge->dissolved) {
570  return;
571  }
572 
574  second = AST_LIST_LAST(&bridge->channels);
575  ast_assert(first && first != second);
576  ast_channel_lock_both(first->chan, second->chan);
577  channel_set_empty_accountcodes(first->chan, second->chan);
578  channel_update_peeraccounts(first->chan, second->chan);
579  ast_channel_unlock(second->chan);
580  ast_channel_unlock(first->chan);
581 }
582 
584 {
585  if (joining) {
587  } else {
589  }
590 }
591 
592 void ast_bridge_channel_kick(struct ast_bridge_channel *bridge_channel, int cause)
593 {
594  struct ast_bridge_features *features = bridge_channel->features;
595  struct ast_bridge_hook *hook;
596  struct ao2_iterator iter;
597 
598  ast_bridge_channel_lock(bridge_channel);
599  if (bridge_channel->state == BRIDGE_CHANNEL_STATE_WAIT) {
600  channel_set_cause(bridge_channel->chan, cause);
601  cause = 0;
602  }
603  ast_bridge_channel_unlock(bridge_channel);
604 
605  /* Run any hangup hooks. */
606  iter = ao2_iterator_init(features->other_hooks, 0);
607  for (; (hook = ao2_iterator_next(&iter)); ao2_ref(hook, -1)) {
608  int remove_me;
609 
610  if (hook->type != AST_BRIDGE_HOOK_TYPE_HANGUP) {
611  continue;
612  }
613  remove_me = hook->callback(bridge_channel, hook->hook_pvt);
614  if (remove_me) {
615  ast_debug(1, "Hangup hook %p is being removed from %p(%s)\n",
616  hook, bridge_channel, ast_channel_name(bridge_channel->chan));
617  ao2_unlink(features->other_hooks, hook);
618  }
619  }
620  ao2_iterator_destroy(&iter);
621 
622  /* Default hangup action. */
624 }
625 
626 /*!
627  * \internal
628  * \brief Write an \ref ast_frame into the bridge
629  * \since 12.0.0
630  *
631  * \param bridge_channel Which channel is queueing the frame.
632  * \param frame The frame to write into the bridge
633  *
634  * \retval 0 on success.
635  * \retval -1 on error.
636  */
637 static int bridge_channel_write_frame(struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
638 {
639  const struct ast_control_t38_parameters *t38_parameters;
640  int unmapped_stream_num;
641  int deferred;
642 
644 
645  ast_bridge_channel_lock_bridge(bridge_channel);
646 
647  /*
648  * Map the frame to the bridge.
649  * We need to lock the bridge_channel to make sure that bridge_channel->chan
650  * isn't NULL and keep it locked while we do multistream processing.
651  */
652  ast_bridge_channel_lock(bridge_channel);
653  if (bridge_channel->chan && ast_channel_is_multistream(bridge_channel->chan)) {
654  unmapped_stream_num = frame->stream_num;
655  switch (frame->frametype) {
656  case AST_FRAME_VOICE:
657  case AST_FRAME_VIDEO:
658  case AST_FRAME_TEXT:
659  case AST_FRAME_IMAGE:
660  case AST_FRAME_RTCP:
661  /* These frames need to be mapped to an appropriate write stream */
662  if (frame->stream_num < 0) {
663  /* Map to default stream */
664  frame->stream_num = -1;
665  break;
666  }
667  if (frame->stream_num < (int)AST_VECTOR_SIZE(&bridge_channel->stream_map.to_bridge)) {
668  frame->stream_num = AST_VECTOR_GET(
669  &bridge_channel->stream_map.to_bridge, frame->stream_num);
670  if (0 <= frame->stream_num) {
671  break;
672  }
673  }
674  ast_bridge_channel_unlock(bridge_channel);
675  ast_bridge_unlock(bridge_channel->bridge);
676  /*
677  * Ignore frame because we don't know how to map the frame
678  * or the bridge is not expecting any media from that
679  * stream.
680  */
681  return 0;
683  case AST_FRAME_DTMF_END:
684  /*
685  * XXX It makes sense that DTMF could be on any audio stream.
686  * For now we will only put it on the default audio stream.
687  */
688  default:
689  frame->stream_num = -1;
690  break;
691  }
692  } else {
693  unmapped_stream_num = -1;
694  frame->stream_num = -1;
695  }
696  ast_bridge_channel_unlock(bridge_channel);
697 
698  deferred = bridge_channel->bridge->technology->write(bridge_channel->bridge, bridge_channel, frame);
699  if (deferred) {
700  struct ast_frame *dup;
701 
702  dup = ast_frdup(frame);
703  if (dup) {
704  /*
705  * We have to unmap the deferred frame so it comes back
706  * in like a new frame.
707  */
708  dup->stream_num = unmapped_stream_num;
709  ast_bridge_channel_lock(bridge_channel);
710  AST_LIST_INSERT_HEAD(&bridge_channel->deferred_queue, dup, frame_list);
711  ast_bridge_channel_unlock(bridge_channel);
712  }
713  }
714 
715  /* Remember any owed events to the bridge. */
716  switch (frame->frametype) {
718  bridge_channel->owed.dtmf_tv = ast_tvnow();
719  bridge_channel->owed.dtmf_digit = frame->subclass.integer;
720  break;
721  case AST_FRAME_DTMF_END:
722  bridge_channel->owed.dtmf_digit = '\0';
723  break;
724  case AST_FRAME_CONTROL:
725  /*
726  * We explicitly will not remember HOLD/UNHOLD frames because
727  * things like attended transfers will handle them.
728  */
729  switch (frame->subclass.integer) {
731  t38_parameters = frame->data.ptr;
732  switch (t38_parameters->request_response) {
734  case AST_T38_NEGOTIATED:
735  bridge_channel->owed.t38_terminate = 1;
736  break;
738  case AST_T38_TERMINATED:
739  case AST_T38_REFUSED:
740  bridge_channel->owed.t38_terminate = 0;
741  break;
742  default:
743  break;
744  }
745  break;
746  default:
747  break;
748  }
749  break;
750  default:
751  break;
752  }
753  ast_bridge_unlock(bridge_channel->bridge);
754 
755  /*
756  * Claim successful write to bridge. If deferred frame
757  * support is added, claim successfully deferred.
758  */
759  return 0;
760 }
761 
762 /*!
763  * \internal
764  * \brief Cancel owed events by the channel to the bridge.
765  * \since 13.8.0
766  *
767  * \param bridge_channel Channel that owes events to the bridge.
768  *
769  * \note On entry, the bridge_channel->bridge is already locked.
770  */
771 static void bridge_channel_cancel_owed_events(struct ast_bridge_channel *bridge_channel)
772 {
773  bridge_channel->owed.dtmf_digit = '\0';
774  bridge_channel->owed.t38_terminate = 0;
775 }
776 
777 void bridge_channel_settle_owed_events(struct ast_bridge *orig_bridge, struct ast_bridge_channel *bridge_channel)
778 {
779  if (bridge_channel->owed.dtmf_digit) {
780  struct ast_frame frame = {
782  .subclass.integer = bridge_channel->owed.dtmf_digit,
783  .src = "Bridge channel owed DTMF",
784  };
785 
786  frame.len = ast_tvdiff_ms(ast_tvnow(), bridge_channel->owed.dtmf_tv);
787  if (frame.len < option_dtmfminduration) {
788  frame.len = option_dtmfminduration;
789  }
790  ast_log(LOG_DTMF, "DTMF end '%c' simulated to bridge %s because %s left. Duration %ld ms.\n",
791  bridge_channel->owed.dtmf_digit, orig_bridge->uniqueid,
792  ast_channel_name(bridge_channel->chan), frame.len);
793  bridge_channel->owed.dtmf_digit = '\0';
794  orig_bridge->technology->write(orig_bridge, NULL, &frame);
795  }
796  if (bridge_channel->owed.t38_terminate) {
797  struct ast_control_t38_parameters t38_parameters = {
799  };
800  struct ast_frame frame = {
802  .subclass.integer = AST_CONTROL_T38_PARAMETERS,
803  .data.ptr = &t38_parameters,
804  .datalen = sizeof(t38_parameters),
805  .src = "Bridge channel owed T.38 terminate",
806  };
807 
808  ast_debug(1, "T.38 terminate simulated to bridge %s because %s left.\n",
809  orig_bridge->uniqueid, ast_channel_name(bridge_channel->chan));
810  bridge_channel->owed.t38_terminate = 0;
811  orig_bridge->technology->write(orig_bridge, NULL, &frame);
812  }
813 }
814 
816 {
817  struct ast_frame *frame;
818 
819  ast_bridge_channel_lock(bridge_channel);
820  ast_channel_lock(bridge_channel->chan);
821  while ((frame = AST_LIST_REMOVE_HEAD(&bridge_channel->deferred_queue, frame_list))) {
822  ast_queue_frame_head(bridge_channel->chan, frame);
823  ast_frfree(frame);
824  }
825  ast_channel_unlock(bridge_channel->chan);
826  ast_bridge_channel_unlock(bridge_channel);
827 }
828 
830 {
831  bridge_channel->suspended = 1;
832  if (bridge_channel->in_bridge) {
833  --bridge_channel->bridge->num_active;
834  }
835 
836  /* Get technology bridge threads off of the channel. */
837  if (bridge_channel->bridge->technology->suspend) {
838  bridge_channel->bridge->technology->suspend(bridge_channel->bridge, bridge_channel);
839  }
840 }
841 
842 /*!
843  * \internal
844  * \brief Suspend a channel from a bridge.
845  *
846  * \param bridge_channel Channel to suspend.
847  */
848 static void bridge_channel_suspend(struct ast_bridge_channel *bridge_channel)
849 {
850  ast_bridge_channel_lock_bridge(bridge_channel);
852  ast_bridge_unlock(bridge_channel->bridge);
853 }
854 
856 {
857  bridge_channel->suspended = 0;
858  if (bridge_channel->in_bridge) {
859  ++bridge_channel->bridge->num_active;
860  }
861 
862  /* Wake technology bridge threads to take care of channel again. */
863  if (bridge_channel->bridge->technology->unsuspend) {
864  bridge_channel->bridge->technology->unsuspend(bridge_channel->bridge, bridge_channel);
865  }
866 
867  /* Wake suspended channel. */
868  ast_bridge_channel_lock(bridge_channel);
869  ast_cond_signal(&bridge_channel->cond);
870  ast_bridge_channel_unlock(bridge_channel);
871 }
872 
873 /*!
874  * \internal
875  * \brief Unsuspend a channel from a bridge.
876  *
877  * \param bridge_channel Channel to unsuspend.
878  */
879 static void bridge_channel_unsuspend(struct ast_bridge_channel *bridge_channel)
880 {
881  ast_bridge_channel_lock_bridge(bridge_channel);
883  ast_bridge_unlock(bridge_channel->bridge);
884 }
885 
886 /*!
887  * \internal
888  * \brief Queue an action frame onto the bridge channel with data.
889  * \since 12.0.0
890  *
891  * \param bridge_channel Which channel to queue the frame onto.
892  * \param action Type of bridge action frame.
893  * \param data Frame payload data to pass.
894  * \param datalen Frame payload data length to pass.
895  *
896  * \retval 0 on success.
897  * \retval -1 on error.
898  */
899 static int bridge_channel_queue_action_data(struct ast_bridge_channel *bridge_channel,
900  enum bridge_channel_action_type action, const void *data, size_t datalen)
901 {
902  struct ast_frame frame = {
904  .subclass.integer = action,
905  .datalen = datalen,
906  .data.ptr = (void *) data,
907  };
908 
909  return ast_bridge_channel_queue_frame(bridge_channel, &frame);
910 }
911 
912 /*!
913  * \internal
914  * \brief Queue an action frame onto the bridge channel with data synchronously.
915  * \since 12.2.0
916  *
917  * The function will not return until the queued frame is freed.
918  *
919  * \param bridge_channel Which channel to queue the frame onto.
920  * \param action Type of bridge action frame.
921  * \param data Frame payload data to pass.
922  * \param datalen Frame payload data length to pass.
923  *
924  * \retval 0 on success.
925  * \retval -1 on error.
926  */
928  enum bridge_channel_action_type action, const void *data, size_t datalen)
929 {
930  struct sync_payload *sync_payload;
931  int sync_payload_len = sizeof(*sync_payload) + datalen;
932  struct bridge_sync sync_struct;
933  struct ast_frame frame = {
935  .subclass.integer = action,
936  };
937 
938  /* Make sure we don't end up trying to wait on ourself to deliver the frame */
939  ast_assert(!pthread_equal(pthread_self(), bridge_channel->thread));
940 
941  sync_payload = ast_alloca(sync_payload_len);
943  memcpy(sync_payload->data, data, datalen);
944 
945  frame.datalen = sync_payload_len;
946  frame.data.ptr = sync_payload;
947 
948  bridge_sync_init(&sync_struct, sync_payload->id);
949  if (ast_bridge_channel_queue_frame(bridge_channel, &frame)) {
950  bridge_sync_cleanup(&sync_struct);
951  return -1;
952  }
953 
954  bridge_sync_wait(&sync_struct);
955  bridge_sync_cleanup(&sync_struct);
956  return 0;
957 }
958 /*!
959  * \internal
960  * \brief Write an action frame onto the bridge channel with data.
961  * \since 12.0.0
962  *
963  * \param bridge_channel Which channel to queue the frame onto.
964  * \param action Type of bridge action frame.
965  * \param data Frame payload data to pass.
966  * \param datalen Frame payload data length to pass.
967  *
968  * \retval 0 on success.
969  * \retval -1 on error.
970  */
971 static int bridge_channel_write_action_data(struct ast_bridge_channel *bridge_channel,
972  enum bridge_channel_action_type action, const void *data, size_t datalen)
973 {
974  struct ast_frame frame = {
976  .subclass.integer = action,
977  .datalen = datalen,
978  .data.ptr = (void *) data,
979  };
980 
981  return bridge_channel_write_frame(bridge_channel, &frame);
982 }
983 
984 static void bridge_frame_free(struct ast_frame *frame)
985 {
986  if (frame->frametype == AST_FRAME_BRIDGE_ACTION_SYNC) {
987  struct sync_payload *sync_payload = frame->data.ptr;
988  struct bridge_sync *sync;
989 
992  if (sync->id == sync_payload->id) {
993  break;
994  }
995  }
996  if (sync) {
997  bridge_sync_signal(sync);
998  }
1000  }
1001 
1002  ast_frfree(frame);
1003 }
1004 
1005 int ast_bridge_channel_queue_frame(struct ast_bridge_channel *bridge_channel, struct ast_frame *fr)
1006 {
1007  struct ast_frame *dup;
1008 
1009  if (bridge_channel->suspended
1010  /* Also defer DTMF frames. */
1012  && fr->frametype != AST_FRAME_DTMF_END
1013  && !ast_is_deferrable_frame(fr)) {
1014  /* Drop non-deferable frames when suspended. */
1015  return 0;
1016  }
1017  if (fr->frametype == AST_FRAME_NULL) {
1018  /* "Accept" the frame and discard it. */
1019  return 0;
1020  }
1021 
1022  if ((fr->frametype == AST_FRAME_VOICE || fr->frametype == AST_FRAME_VIDEO ||
1024  fr->frametype == AST_FRAME_RTCP) && fr->stream_num > -1) {
1025  int num = -1;
1026 
1027  ast_bridge_channel_lock(bridge_channel);
1028  if (fr->stream_num < (int)AST_VECTOR_SIZE(&bridge_channel->stream_map.to_channel)) {
1029  num = AST_VECTOR_GET(&bridge_channel->stream_map.to_channel, fr->stream_num);
1030  }
1031  ast_bridge_channel_unlock(bridge_channel);
1032 
1033  if (num == -1) {
1034  /* We don't have a mapped stream so just discard this frame. */
1035  return 0;
1036  }
1037  }
1038 
1039  dup = ast_frdup(fr);
1040  if (!dup) {
1041  return -1;
1042  }
1043 
1044  ast_bridge_channel_lock(bridge_channel);
1045  if (bridge_channel->state != BRIDGE_CHANNEL_STATE_WAIT) {
1046  /* Drop frames on channels leaving the bridge. */
1047  ast_bridge_channel_unlock(bridge_channel);
1048  bridge_frame_free(dup);
1049  return 0;
1050  }
1051 
1052  if ((fr->frametype == AST_FRAME_TEXT || fr->frametype == AST_FRAME_TEXT_DATA) &&
1053  !bridge_channel->features->text_messaging) {
1054  /* This channel is not accepting text messages. */
1055  ast_bridge_channel_unlock(bridge_channel);
1056  bridge_frame_free(dup);
1057  return 0;
1058  }
1059 
1060  if (DEBUG_ATLEAST(1)) {
1061  if (fr->frametype == AST_FRAME_TEXT) {
1062  ast_log(LOG_DEBUG, "Queuing TEXT frame to '%s': %*.s\n", ast_channel_name(bridge_channel->chan),
1063  fr->datalen, (char *)fr->data.ptr);
1064  } else if (fr->frametype == AST_FRAME_TEXT_DATA) {
1065  struct ast_msg_data *msg = fr->data.ptr;
1066  ast_log(LOG_DEBUG, "Queueing TEXT_DATA frame from '%s' to '%s:%s': %s\n",
1069  ast_channel_name(bridge_channel->chan),
1071  }
1072  }
1073 
1074  AST_LIST_INSERT_TAIL(&bridge_channel->wr_queue, dup, frame_list);
1075  if (ast_alertpipe_write(bridge_channel->alert_pipe)) {
1076  ast_log(LOG_ERROR, "We couldn't write alert pipe for %p(%s)... something is VERY wrong\n",
1077  bridge_channel, ast_channel_name(bridge_channel->chan));
1078  }
1079  ast_bridge_channel_unlock(bridge_channel);
1080  return 0;
1081 }
1082 
1083 int ast_bridge_queue_everyone_else(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
1084 {
1085  struct ast_bridge_channel *cur;
1086  int not_written = -1;
1087 
1088  if (frame->frametype == AST_FRAME_NULL) {
1089  /* "Accept" the frame and discard it. */
1090  return 0;
1091  }
1092 
1094  if (cur == bridge_channel) {
1095  continue;
1096  }
1097  if (!ast_bridge_channel_queue_frame(cur, frame)) {
1098  not_written = 0;
1099  }
1100  }
1101  return not_written;
1102 }
1103 
1104 int ast_bridge_channel_queue_control_data(struct ast_bridge_channel *bridge_channel, enum ast_control_frame_type control, const void *data, size_t datalen)
1105 {
1106  struct ast_frame frame = {
1108  .subclass.integer = control,
1109  .datalen = datalen,
1110  .data.ptr = (void *) data,
1111  };
1112 
1113  return ast_bridge_channel_queue_frame(bridge_channel, &frame);
1114 }
1115 
1116 int ast_bridge_channel_write_control_data(struct ast_bridge_channel *bridge_channel, enum ast_control_frame_type control, const void *data, size_t datalen)
1117 {
1118  struct ast_frame frame = {
1120  .subclass.integer = control,
1121  .datalen = datalen,
1122  .data.ptr = (void *) data,
1123  };
1124 
1125  return bridge_channel_write_frame(bridge_channel, &frame);
1126 }
1127 
1128 int ast_bridge_channel_write_hold(struct ast_bridge_channel *bridge_channel, const char *moh_class)
1129 {
1130  struct ast_json *blob;
1131  int res;
1132  size_t datalen;
1133 
1134  if (!ast_strlen_zero(moh_class)) {
1135  datalen = strlen(moh_class) + 1;
1136 
1137  blob = ast_json_pack("{s: s}",
1138  "musicclass", moh_class);
1139  } else {
1140  moh_class = NULL;
1141  datalen = 0;
1142  blob = NULL;
1143  }
1144 
1146 
1148  moh_class, datalen);
1149 
1150  ast_json_unref(blob);
1151  return res;
1152 }
1153 
1155 {
1157 
1158  if (!chan) {
1159  return -1;
1160  }
1161 
1163  ao2_ref(chan, -1);
1164 
1166 }
1167 
1168 /*!
1169  * \internal
1170  * \brief Helper function to kick off a PBX app on a bridge_channel
1171  */
1172 static int run_app_helper(struct ast_channel *chan, const char *app_name, const char *app_args)
1173 {
1174  int res = 0;
1175 
1176  if (!strcasecmp("Gosub", app_name)) {
1177  ast_app_exec_sub(NULL, chan, app_args, 0);
1178  } else if (!strcasecmp("Macro", app_name)) {
1179  ast_app_exec_macro(NULL, chan, app_args);
1180  } else {
1181  struct ast_app *app;
1182 
1184  if (!app) {
1185  ast_log(LOG_WARNING, "Could not find application (%s)\n", app_name);
1186  } else {
1187  struct ast_str *substituted_args = ast_str_create(16);
1188 
1189  if (substituted_args) {
1190  ast_str_substitute_variables(&substituted_args, 0, chan, app_args);
1191  res = pbx_exec(chan, app, ast_str_buffer(substituted_args));
1192  ast_free(substituted_args);
1193  } else {
1194  ast_log(LOG_WARNING, "Could not substitute application argument variables for %s\n", app_name);
1195  res = pbx_exec(chan, app, app_args);
1196  }
1197  }
1198  }
1199  return res;
1200 }
1201 
1202 void ast_bridge_channel_run_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class)
1203 {
1204  if (moh_class) {
1205  ast_bridge_channel_write_hold(bridge_channel, moh_class);
1206  }
1207  if (run_app_helper(bridge_channel->chan, app_name, S_OR(app_args, ""))) {
1208  /* Break the bridge if the app returns non-zero. */
1210  }
1211  if (moh_class) {
1212  ast_bridge_channel_write_unhold(bridge_channel);
1213  }
1214 }
1215 
1217  /*! Offset into app_name[] where the MOH class name starts. (zero if no MOH) */
1219  /*! Offset into app_name[] where the application argument string starts. (zero if no arguments) */
1221  /*! Application name to run. */
1222  char app_name[0];
1223 };
1224 
1225 /*!
1226  * \internal
1227  * \brief Handle the run application bridge action.
1228  * \since 12.0.0
1229  *
1230  * \param bridge_channel Which channel to run the application on.
1231  * \param data Action frame data to run the application.
1232  */
1233 static void bridge_channel_run_app(struct ast_bridge_channel *bridge_channel, struct bridge_run_app *data)
1234 {
1235  ast_bridge_channel_run_app(bridge_channel, data->app_name,
1236  data->app_args_offset ? &data->app_name[data->app_args_offset] : NULL,
1237  data->moh_offset ? &data->app_name[data->moh_offset] : NULL);
1238 }
1239 
1240 /*!
1241  * \internal
1242  * \brief Marshal an application to be executed on a bridge_channel
1243  */
1245  struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class)
1246 {
1247  struct bridge_run_app *app_data;
1248  size_t len_name = strlen(app_name) + 1;
1249  size_t len_args = ast_strlen_zero(app_args) ? 0 : strlen(app_args) + 1;
1250  size_t len_moh = !moh_class ? 0 : strlen(moh_class) + 1;
1251  size_t len_data = sizeof(*app_data) + len_name + len_args + len_moh;
1252 
1253  /* Fill in application run frame data. */
1254  app_data = alloca(len_data);
1255  app_data->app_args_offset = len_args ? len_name : 0;
1256  app_data->moh_offset = len_moh ? len_name + len_args : 0;
1257  strcpy(app_data->app_name, app_name);/* Safe */
1258  if (len_args) {
1259  strcpy(&app_data->app_name[app_data->app_args_offset], app_args);/* Safe */
1260  }
1261  if (moh_class) {
1262  strcpy(&app_data->app_name[app_data->moh_offset], moh_class);/* Safe */
1263  }
1264 
1265  return post_it(bridge_channel, BRIDGE_CHANNEL_ACTION_RUN_APP, app_data, len_data);
1266 }
1267 
1268 int ast_bridge_channel_write_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class)
1269 {
1271  bridge_channel, app_name, app_args, moh_class);
1272 }
1273 
1274 int ast_bridge_channel_queue_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class)
1275 {
1277  bridge_channel, app_name, app_args, moh_class);
1278 }
1279 
1280 void ast_bridge_channel_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
1281 {
1282  if (moh_class) {
1283  ast_bridge_channel_write_hold(bridge_channel, moh_class);
1284  }
1285  if (custom_play) {
1286  custom_play(bridge_channel, playfile);
1287  } else {
1288  ast_stream_and_wait(bridge_channel->chan, playfile, AST_DIGIT_NONE);
1289  }
1290  if (moh_class) {
1291  ast_bridge_channel_write_unhold(bridge_channel);
1292  }
1293 
1294  /*
1295  * It may be necessary to resume music on hold after we finish
1296  * playing the announcment.
1297  */
1298  if (ast_test_flag(ast_channel_flags(bridge_channel->chan), AST_FLAG_MOH)) {
1299  const char *latest_musicclass;
1300 
1301  ast_channel_lock(bridge_channel->chan);
1302  latest_musicclass = ast_strdupa(ast_channel_latest_musicclass(bridge_channel->chan));
1303  ast_channel_unlock(bridge_channel->chan);
1304  ast_moh_start(bridge_channel->chan, latest_musicclass, NULL);
1305  }
1306 }
1307 
1309  /*! Call this function to play the playfile. (NULL if normal sound file to play) */
1311  /*! Offset into playfile[] where the MOH class name starts. (zero if no MOH)*/
1313  /*! Filename to play. */
1314  char playfile[0];
1315 };
1316 
1317 /*!
1318  * \internal
1319  * \brief Handle the playfile bridge action.
1320  * \since 12.0.0
1321  *
1322  * \param bridge_channel Which channel to play a file on.
1323  * \param payload Action frame payload to play a file.
1324  */
1325 static void bridge_channel_playfile(struct ast_bridge_channel *bridge_channel, struct bridge_playfile *payload)
1326 {
1327  ast_bridge_channel_playfile(bridge_channel, payload->custom_play, payload->playfile,
1328  payload->moh_offset ? &payload->playfile[payload->moh_offset] : NULL);
1329 }
1330 
1331 /*!
1332  * \internal
1333  * \brief Marshal a file to be played on a bridge_channel
1334  */
1336  struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
1337 {
1338  struct bridge_playfile *payload;
1339  size_t len_name = strlen(playfile) + 1;
1340  size_t len_moh = !moh_class ? 0 : strlen(moh_class) + 1;
1341  size_t len_payload = sizeof(*payload) + len_name + len_moh;
1342 
1343  /* Fill in play file frame data. */
1344  payload = ast_alloca(len_payload);
1345  payload->custom_play = custom_play;
1346  payload->moh_offset = len_moh ? len_name : 0;
1347  strcpy(payload->playfile, playfile);/* Safe */
1348  if (moh_class) {
1349  strcpy(&payload->playfile[payload->moh_offset], moh_class);/* Safe */
1350  }
1351 
1352  return post_it(bridge_channel, BRIDGE_CHANNEL_ACTION_PLAY_FILE, payload, len_payload);
1353 }
1354 
1355 int ast_bridge_channel_write_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
1356 {
1358  bridge_channel, custom_play, playfile, moh_class);
1359 }
1360 
1361 int ast_bridge_channel_queue_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
1362 {
1364  bridge_channel, custom_play, playfile, moh_class);
1365 }
1366 
1368  ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
1369 {
1371  bridge_channel, custom_play, playfile, moh_class);
1372 }
1373 
1375  /*! Call this function on the bridge channel thread. */
1377  /*! Size of the payload if it exists. A number otherwise. */
1379  /*! Option flags determining how callback is called. */
1380  unsigned int flags;
1381  /*! Nonzero if the payload exists. */
1383  /*! Payload to give to callback. */
1384  char payload[0];
1385 };
1386 
1387 /*!
1388  * \internal
1389  * \brief Handle the do custom callback bridge action.
1390  * \since 12.0.0
1391  *
1392  * \param bridge_channel Which channel to call the callback on.
1393  * \param data Action frame data to call the callback.
1394  */
1395 static void bridge_channel_do_callback(struct ast_bridge_channel *bridge_channel, struct bridge_custom_callback *data)
1396 {
1398  bridge_channel_suspend(bridge_channel);
1399  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
1400  }
1401  data->callback(bridge_channel, data->payload_exists ? data->payload : NULL, data->payload_size);
1403  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
1404  bridge_channel_unsuspend(bridge_channel);
1405  }
1406 }
1407 
1408 /*!
1409  * \internal
1410  * \brief Marshal a custom callback function to be called on a bridge_channel
1411  */
1413  struct ast_bridge_channel *bridge_channel,
1415  ast_bridge_custom_callback_fn callback, const void *payload, size_t payload_size)
1416 {
1417  struct bridge_custom_callback *cb_data;
1418  size_t len_data = sizeof(*cb_data) + (payload ? payload_size : 0);
1419 
1420  /* Sanity check. */
1421  if (!callback) {
1422  ast_assert(0);
1423  return -1;
1424  }
1425 
1426  /* Fill in custom callback frame data. */
1427  cb_data = alloca(len_data);
1428  cb_data->callback = callback;
1429  cb_data->payload_size = payload_size;
1430  cb_data->flags = flags;
1431  cb_data->payload_exists = payload && payload_size;
1432  if (cb_data->payload_exists) {
1433  memcpy(cb_data->payload, payload, payload_size);/* Safe */
1434  }
1435 
1436  return post_it(bridge_channel, BRIDGE_CHANNEL_ACTION_CALLBACK, cb_data, len_data);
1437 }
1438 
1442 {
1444  bridge_channel, flags, callback, payload, payload_size);
1445 }
1446 
1450 {
1452  bridge_channel, flags, callback, payload, payload_size);
1453 }
1454 
1455 struct bridge_park {
1458  /* buffer used for holding those strings */
1459  char parkee_uuid[0];
1460 };
1461 
1462 /*!
1463  * \internal
1464  * \brief Park a bridge_cahnnel
1465  */
1466 static void bridge_channel_park(struct ast_bridge_channel *bridge_channel, struct bridge_park *payload)
1467 {
1469  ast_log(AST_LOG_WARNING, "Unable to park %s: No parking provider loaded!\n",
1470  ast_channel_name(bridge_channel->chan));
1471  return;
1472  }
1473 
1474  if (ast_parking_park_bridge_channel(bridge_channel, payload->parkee_uuid,
1475  &payload->parkee_uuid[payload->parker_uuid_offset],
1476  payload->app_data_offset ? &payload->parkee_uuid[payload->app_data_offset] : NULL)) {
1477  ast_log(AST_LOG_WARNING, "Error occurred while parking %s\n",
1478  ast_channel_name(bridge_channel->chan));
1479  }
1480 }
1481 
1482 /*!
1483  * \internal
1484  * \brief Marshal a park action onto a bridge_channel
1485  */
1487  struct ast_bridge_channel *bridge_channel,
1488  const char *parkee_uuid,
1489  const char *parker_uuid,
1490  const char *app_data)
1491 {
1492  struct bridge_park *payload;
1493  size_t len_parkee_uuid = strlen(parkee_uuid) + 1;
1494  size_t len_parker_uuid = strlen(parker_uuid) + 1;
1495  size_t len_app_data = !app_data ? 0 : strlen(app_data) + 1;
1496  size_t len_payload = sizeof(*payload) + len_parker_uuid + len_parkee_uuid + len_app_data;
1497 
1498  payload = alloca(len_payload);
1499  payload->app_data_offset = len_app_data ? len_parkee_uuid + len_parker_uuid : 0;
1500  payload->parker_uuid_offset = len_parkee_uuid;
1501  strcpy(payload->parkee_uuid, parkee_uuid);
1502  strcpy(&payload->parkee_uuid[payload->parker_uuid_offset], parker_uuid);
1503  if (app_data) {
1504  strcpy(&payload->parkee_uuid[payload->app_data_offset], app_data);
1505  }
1506 
1507  return post_it(bridge_channel, BRIDGE_CHANNEL_ACTION_PARK, payload, len_payload);
1508 }
1509 
1510 int ast_bridge_channel_write_park(struct ast_bridge_channel *bridge_channel, const char *parkee_uuid, const char *parker_uuid, const char *app_data)
1511 {
1513  bridge_channel, parkee_uuid, parker_uuid, app_data);
1514 }
1515 
1516 /*!
1517  * \internal
1518  * \brief Handle bridge channel interval expiration.
1519  * \since 12.0.0
1520  *
1521  * \param bridge_channel Channel to run expired intervals on.
1522  */
1523 static void bridge_channel_handle_interval(struct ast_bridge_channel *bridge_channel)
1524 {
1525  struct ast_heap *interval_hooks;
1526  struct ast_bridge_hook_timer *hook;
1527  struct timeval start;
1528  int chan_suspended = 0;
1529 
1530  interval_hooks = bridge_channel->features->interval_hooks;
1531  ast_heap_wrlock(interval_hooks);
1532  start = ast_tvnow();
1533  while ((hook = ast_heap_peek(interval_hooks, 1))) {
1534  int interval;
1535  unsigned int execution_time;
1536 
1537  if (ast_tvdiff_ms(hook->timer.trip_time, start) > 0) {
1538  ast_debug(1, "Hook %p on %p(%s) wants to happen in the future, stopping our traversal\n",
1539  hook, bridge_channel, ast_channel_name(bridge_channel->chan));
1540  break;
1541  }
1542  ao2_ref(hook, +1);
1543  ast_heap_unlock(interval_hooks);
1544 
1545  if (!chan_suspended
1547  chan_suspended = 1;
1548  bridge_channel_suspend(bridge_channel);
1549  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
1550  }
1551 
1552  ast_debug(1, "Executing hook %p on %p(%s)\n",
1553  hook, bridge_channel, ast_channel_name(bridge_channel->chan));
1554  interval = hook->generic.callback(bridge_channel, hook->generic.hook_pvt);
1555 
1556  ast_heap_wrlock(interval_hooks);
1557  if (ast_heap_peek(interval_hooks, hook->timer.heap_index) != hook
1558  || !ast_heap_remove(interval_hooks, hook)) {
1559  /* Interval hook is already removed from the bridge_channel. */
1560  ao2_ref(hook, -1);
1561  continue;
1562  }
1563  ao2_ref(hook, -1);
1564 
1565  if (interval < 0) {
1566  ast_debug(1, "Removed interval hook %p from %p(%s)\n",
1567  hook, bridge_channel, ast_channel_name(bridge_channel->chan));
1568  ao2_ref(hook, -1);
1569  continue;
1570  }
1571  if (interval) {
1572  /* Set new interval for the hook. */
1573  hook->timer.interval = interval;
1574  }
1575 
1576  ast_debug(1, "Updating interval hook %p with interval %u on %p(%s)\n",
1577  hook, hook->timer.interval, bridge_channel,
1578  ast_channel_name(bridge_channel->chan));
1579 
1580  /* resetting start */
1581  start = ast_tvnow();
1582 
1583  /*
1584  * Resetup the interval hook for the next interval. We may need
1585  * to skip over any missed intervals because the hook was
1586  * delayed or took too long.
1587  */
1588  execution_time = ast_tvdiff_ms(start, hook->timer.trip_time);
1589  while (hook->timer.interval < execution_time) {
1590  execution_time -= hook->timer.interval;
1591  }
1592  hook->timer.trip_time = ast_tvadd(start, ast_samp2tv(hook->timer.interval - execution_time, 1000));
1593  hook->timer.seqno = ast_atomic_fetchadd_int((int *) &bridge_channel->features->interval_sequence, +1);
1594 
1595  if (ast_heap_push(interval_hooks, hook)) {
1596  /* Could not push the hook back onto the heap. */
1597  ao2_ref(hook, -1);
1598  }
1599  }
1600  ast_heap_unlock(interval_hooks);
1601 
1602  if (chan_suspended) {
1603  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
1604  bridge_channel_unsuspend(bridge_channel);
1605  }
1606 }
1607 
1608 /*!
1609  * \internal
1610  * \brief Write a DTMF stream out to a channel
1611  */
1612 static int bridge_channel_write_dtmf_stream(struct ast_bridge_channel *bridge_channel, const char *dtmf)
1613 {
1614  return bridge_channel_write_action_data(bridge_channel,
1615  BRIDGE_CHANNEL_ACTION_DTMF_STREAM, dtmf, strlen(dtmf) + 1);
1616 }
1617 
1618 /*!
1619  * \internal
1620  * \brief Indicate to the testsuite a feature was successfully detected.
1621  *
1622  * Currently, this function only will relay built-in features to the testsuite,
1623  * but it could be modified to detect applicationmap items should the need arise.
1624  *
1625  * \param chan The channel that activated the feature
1626  * \param dtmf The DTMF sequence entered to activate the feature
1627  */
1628 static void testsuite_notify_feature_success(struct ast_channel *chan, const char *dtmf)
1629 {
1630 #ifdef TEST_FRAMEWORK
1631  char *feature = "unknown";
1632  struct ast_featuremap_config *featuremap;
1633  struct ast_features_xfer_config *xfer;
1634 
1635  ast_channel_lock(chan);
1636  featuremap = ast_get_chan_featuremap_config(chan);
1637  xfer = ast_get_chan_features_xfer_config(chan);
1638  ast_channel_unlock(chan);
1639 
1640  if (featuremap) {
1641  if (!strcmp(dtmf, featuremap->blindxfer)) {
1642  feature = "blindxfer";
1643  } else if (!strcmp(dtmf, featuremap->atxfer)) {
1644  feature = "atxfer";
1645  } else if (!strcmp(dtmf, featuremap->disconnect)) {
1646  feature = "disconnect";
1647  } else if (!strcmp(dtmf, featuremap->automon)) {
1648  feature = "automon";
1649  } else if (!strcmp(dtmf, featuremap->automixmon)) {
1650  feature = "automixmon";
1651  } else if (!strcmp(dtmf, featuremap->parkcall)) {
1652  feature = "parkcall";
1653  }
1654  }
1655  if (xfer) {
1656  if (!strcmp(dtmf, xfer->atxferthreeway)) {
1657  feature = "atxferthreeway";
1658  }
1659  }
1660 
1661  ao2_cleanup(featuremap);
1662  ao2_cleanup(xfer);
1663 
1664  ast_test_suite_event_notify("FEATURE_DETECTION",
1665  "Result: success\r\n"
1666  "Feature: %s", feature);
1667 #endif /* TEST_FRAMEWORK */
1668 }
1669 
1671  struct ast_bridge_channel *bridge_channel, int digit, size_t dtmf_len)
1672 {
1673  if (dtmf_len < ARRAY_LEN(bridge_channel->dtmf_hook_state.collected) - 1) {
1674  /* Add the new digit to the DTMF string so we can do our matching */
1675  bridge_channel->dtmf_hook_state.collected[dtmf_len++] = digit;
1676  bridge_channel->dtmf_hook_state.collected[dtmf_len] = '\0';
1677 
1678  ast_debug(1, "DTMF feature string on %p(%s) is now '%s'\n",
1679  bridge_channel, ast_channel_name(bridge_channel->chan),
1680  bridge_channel->dtmf_hook_state.collected);
1681  }
1682 
1683  return dtmf_len;
1684 }
1685 
1686 static unsigned int bridge_channel_feature_digit_timeout(struct ast_bridge_channel *bridge_channel)
1687 {
1688  unsigned int digit_timeout;
1689  struct ast_features_general_config *gen_cfg;
1690 
1691  /* Determine interdigit timeout */
1692  ast_channel_lock(bridge_channel->chan);
1693  gen_cfg = ast_get_chan_features_general_config(bridge_channel->chan);
1694  ast_channel_unlock(bridge_channel->chan);
1695 
1696  if (!gen_cfg) {
1697  ast_log(LOG_ERROR, "Unable to retrieve features configuration.\n");
1698  return 3000; /* Pick a reasonable failsafe timeout in ms */
1699  }
1700 
1701  digit_timeout = gen_cfg->featuredigittimeout;
1702  ao2_ref(gen_cfg, -1);
1703 
1704  return digit_timeout;
1705 }
1706 
1708 {
1709  if (digit) {
1711  bridge_channel, digit, strlen(bridge_channel->dtmf_hook_state.collected));
1712  }
1713 }
1714 
1716 {
1717  struct ast_bridge_features *features = bridge_channel->features;
1718  struct ast_bridge_hook_dtmf *hook = NULL;
1719  size_t dtmf_len;
1720 
1721  struct sanity_check_of_dtmf_size {
1722  char check[1 / (ARRAY_LEN(bridge_channel->dtmf_hook_state.collected) == ARRAY_LEN(hook->dtmf.code))];
1723  };
1724 
1725  dtmf_len = strlen(bridge_channel->dtmf_hook_state.collected);
1726  if (!dtmf_len && !digit) {
1727  /* Nothing to do */
1728  return;
1729  }
1730 
1731  if (digit) {
1732  dtmf_len = bridge_channel_feature_digit_add(bridge_channel, digit, dtmf_len);
1733  }
1734 
1735  while (digit) {
1736  /* See if a DTMF feature hook matches or can match */
1737  hook = ao2_find(features->dtmf_hooks, bridge_channel->dtmf_hook_state.collected,
1739  if (!hook) {
1740  ast_debug(1, "No DTMF feature hooks on %p(%s) match '%s'\n",
1741  bridge_channel, ast_channel_name(bridge_channel->chan),
1742  bridge_channel->dtmf_hook_state.collected);
1743  break;
1744  } else if (dtmf_len != strlen(hook->dtmf.code)) {
1745  unsigned int digit_timeout;
1746  /* Need more digits to match */
1747  ao2_ref(hook, -1);
1748  digit_timeout = bridge_channel_feature_digit_timeout(bridge_channel);
1749  bridge_channel->dtmf_hook_state.interdigit_timeout =
1750  ast_tvadd(ast_tvnow(), ast_samp2tv(digit_timeout, 1000));
1751  return;
1752  } else {
1753  int remove_me;
1754  int already_suspended;
1755 
1756  ast_debug(1, "DTMF feature hook %p matched DTMF string '%s' on %p(%s)\n",
1757  hook, bridge_channel->dtmf_hook_state.collected, bridge_channel,
1758  ast_channel_name(bridge_channel->chan));
1759 
1760  /*
1761  * Clear the collected digits before executing the hook
1762  * in case the hook starts another sequence.
1763  */
1764  bridge_channel->dtmf_hook_state.collected[0] = '\0';
1765 
1766  ast_bridge_channel_lock_bridge(bridge_channel);
1767  already_suspended = bridge_channel->suspended;
1768  if (!already_suspended) {
1770  }
1771  ast_bridge_unlock(bridge_channel->bridge);
1772  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
1773 
1774  /* Execute the matched hook on this channel. */
1775  remove_me = hook->generic.callback(bridge_channel, hook->generic.hook_pvt);
1776  if (remove_me) {
1777  ast_debug(1, "DTMF hook %p is being removed from %p(%s)\n",
1778  hook, bridge_channel, ast_channel_name(bridge_channel->chan));
1779  ao2_unlink(features->dtmf_hooks, hook);
1780  }
1781  testsuite_notify_feature_success(bridge_channel->chan, hook->dtmf.code);
1782  ao2_ref(hook, -1);
1783 
1784  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
1785  if (!already_suspended) {
1786  bridge_channel_unsuspend(bridge_channel);
1787  }
1788 
1789  /*
1790  * If we are handing the channel off to an external hook for
1791  * ownership, we are not guaranteed what kind of state it will
1792  * come back in. If the channel hungup, we need to detect that
1793  * here if the hook did not already change the state.
1794  */
1795  if (bridge_channel->chan && ast_check_hangup_locked(bridge_channel->chan)) {
1796  ast_bridge_channel_kick(bridge_channel, 0);
1797  bridge_channel->dtmf_hook_state.collected[0] = '\0';
1798  return;
1799  }
1800 
1801  /* if there is dtmf that has been collected then loop back through,
1802  but set digit to -1 so it doesn't try to do an add since the dtmf
1803  is already in the buffer */
1804  dtmf_len = strlen(bridge_channel->dtmf_hook_state.collected);
1805  if (!dtmf_len) {
1806  return;
1807  }
1808  }
1809  }
1810 
1811  if (!digit) {
1812  ast_debug(1, "DTMF feature string collection on %p(%s) timed out\n",
1813  bridge_channel, ast_channel_name(bridge_channel->chan));
1814  }
1815 
1816  /* Timeout or DTMF digit didn't allow a match with any hooks. */
1817  if (features->dtmf_passthrough) {
1818  /* Stream the collected DTMF to the other channels. */
1819  bridge_channel_write_dtmf_stream(bridge_channel,
1820  bridge_channel->dtmf_hook_state.collected);
1821  }
1822  bridge_channel->dtmf_hook_state.collected[0] = '\0';
1823 
1824  ast_test_suite_event_notify("FEATURE_DETECTION", "Result: fail");
1825 }
1826 
1827 /*!
1828  * \internal
1829  * \brief Handle bridge channel DTMF feature timeout expiration.
1830  * \since 12.8.0
1831  *
1832  * \param bridge_channel Channel to check expired interdigit timer on.
1833  */
1835 {
1836  if (!bridge_channel->dtmf_hook_state.collected[0]
1837  || 0 < ast_tvdiff_ms(bridge_channel->dtmf_hook_state.interdigit_timeout,
1838  ast_tvnow())) {
1839  /* Not within a sequence or not timed out. */
1840  return;
1841  }
1842 
1843  ast_bridge_channel_feature_digit(bridge_channel, 0);
1844 }
1845 
1846 /*!
1847  * \internal
1848  * \brief Indicate that a bridge_channel is talking
1849  */
1850 static void bridge_channel_talking(struct ast_bridge_channel *bridge_channel, int talking)
1851 {
1852  struct ast_bridge_features *features = bridge_channel->features;
1853  struct ast_bridge_hook *hook;
1854  struct ao2_iterator iter;
1855 
1856  /* Run any talk detection hooks. */
1857  iter = ao2_iterator_init(features->other_hooks, 0);
1858  for (; (hook = ao2_iterator_next(&iter)); ao2_ref(hook, -1)) {
1859  int remove_me;
1861 
1862  if (hook->type != AST_BRIDGE_HOOK_TYPE_TALK) {
1863  continue;
1864  }
1866  remove_me = talk_cb(bridge_channel, hook->hook_pvt, talking);
1867  if (remove_me) {
1868  ast_debug(1, "Talk detection hook %p is being removed from %p(%s)\n",
1869  hook, bridge_channel, ast_channel_name(bridge_channel->chan));
1870  ao2_unlink(features->other_hooks, hook);
1871  }
1872  }
1873  ao2_iterator_destroy(&iter);
1874 }
1875 
1876 /*!
1877  * \internal
1878  * \brief Play back DTMF on a bridge channel
1879  */
1880 static void bridge_channel_dtmf_stream(struct ast_bridge_channel *bridge_channel, const char *dtmf)
1881 {
1882  ast_debug(1, "Playing DTMF stream '%s' out to %p(%s)\n",
1883  dtmf, bridge_channel, ast_channel_name(bridge_channel->chan));
1884  ast_dtmf_stream(bridge_channel->chan, NULL, dtmf, 0, 0);
1885 }
1886 
1887 /*! \brief Data specifying where a blind transfer is going to */
1891 };
1892 
1893 /*!
1894  * \internal
1895  * \brief Execute after bridge actions on a channel when it leaves a bridge
1896  */
1897 static void after_bridge_move_channel(struct ast_channel *chan_bridged, void *data)
1898 {
1899  RAII_VAR(struct ast_channel *, chan_target, data, ao2_cleanup);
1900  struct ast_party_connected_line connected_target;
1901  unsigned char connected_line_data[1024];
1902  int payload_size;
1903 
1904  ast_party_connected_line_init(&connected_target);
1905 
1906  ast_channel_lock(chan_target);
1907  ast_party_connected_line_copy(&connected_target, ast_channel_connected(chan_target));
1908  ast_channel_unlock(chan_target);
1909  ast_party_id_reset(&connected_target.priv);
1910 
1911  if (ast_channel_move(chan_target, chan_bridged)) {
1912  ast_softhangup(chan_target, AST_SOFTHANGUP_DEV);
1913  ast_party_connected_line_free(&connected_target);
1914  return;
1915  }
1916 
1917  /* The ast_channel_move function will end up updating the connected line information
1918  * on chan_target to the value we have here, but will not inform it. To ensure that
1919  * AST_FRAME_READ_ACTION_CONNECTED_LINE_MACRO is executed we wipe it away here. If
1920  * we don't do this then the change will be considered redundant, since the connected
1921  * line information is already there (despite the channel not being told).
1922  */
1923  ast_channel_lock(chan_target);
1926  ast_channel_unlock(chan_target);
1927 
1928  if ((payload_size = ast_connected_line_build_data(connected_line_data,
1929  sizeof(connected_line_data), &connected_target, NULL)) != -1) {
1930  struct ast_control_read_action_payload *frame_payload;
1931  int frame_size;
1932 
1933  frame_size = payload_size + sizeof(*frame_payload);
1934  frame_payload = ast_alloca(frame_size);
1936  frame_payload->payload_size = payload_size;
1937  memcpy(frame_payload->payload, connected_line_data, payload_size);
1938  ast_queue_control_data(chan_target, AST_CONTROL_READ_ACTION, frame_payload, frame_size);
1939  }
1940 
1941  /* A connected line update is queued so that if chan_target is remotely involved with
1942  * anything (such as dialing a channel) the other channel(s) will be informed of the
1943  * new channel they are involved with.
1944  */
1945  ast_channel_lock(chan_target);
1946  ast_connected_line_copy_from_caller(&connected_target, ast_channel_caller(chan_target));
1947  ast_channel_queue_connected_line_update(chan_target, &connected_target, NULL);
1948  ast_channel_unlock(chan_target);
1949 
1950  ast_party_connected_line_free(&connected_target);
1951 }
1952 
1953 /*!
1954  * \internal
1955  * \brief Execute logic to cleanup when after bridge fails
1956  */
1958 {
1959  RAII_VAR(struct ast_channel *, chan_target, data, ao2_cleanup);
1960 
1961  ast_log(LOG_WARNING, "Unable to complete transfer: %s\n",
1963  ast_softhangup(chan_target, AST_SOFTHANGUP_DEV);
1964 }
1965 
1966 /*!
1967  * \internal
1968  * \brief Perform a blind transfer on a channel in a bridge
1969  */
1970 static void bridge_channel_blind_transfer(struct ast_bridge_channel *bridge_channel,
1971  struct blind_transfer_data *blind_data)
1972 {
1973  ast_async_goto(bridge_channel->chan, blind_data->context, blind_data->exten, 1);
1975 }
1976 
1977 /*!
1978  * \internal
1979  * \brief Perform an attended transfer on a channel in a bridge
1980  */
1981 static void bridge_channel_attended_transfer(struct ast_bridge_channel *bridge_channel,
1982  const char *target_chan_name)
1983 {
1984  RAII_VAR(struct ast_channel *, chan_target, NULL, ao2_cleanup);
1985  RAII_VAR(struct ast_channel *, chan_bridged, NULL, ao2_cleanup);
1986 
1987  chan_target = ast_channel_get_by_name(target_chan_name);
1988  if (!chan_target) {
1989  /* Dang, it disappeared somehow */
1991  return;
1992  }
1993 
1994  ast_bridge_channel_lock(bridge_channel);
1995  chan_bridged = bridge_channel->chan;
1996  ast_assert(chan_bridged != NULL);
1997  ao2_ref(chan_bridged, +1);
1998  ast_bridge_channel_unlock(bridge_channel);
1999 
2002  ast_softhangup(chan_target, AST_SOFTHANGUP_DEV);
2003 
2004  /* Release the ref we tried to pass to ast_bridge_set_after_callback(). */
2005  ast_channel_unref(chan_target);
2006  }
2008 }
2009 
2010 /*!
2011  * \internal
2012  * \brief Handle bridge channel bridge action frame.
2013  * \since 12.0.0
2014  *
2015  * \param bridge_channel Channel to execute the action on.
2016  * \param action What to do.
2017  * \param data data from the action.
2018  */
2019 static void bridge_channel_handle_action(struct ast_bridge_channel *bridge_channel,
2020  enum bridge_channel_action_type action, void *data)
2021 {
2022  switch (action) {
2024  bridge_channel_suspend(bridge_channel);
2025  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
2026  bridge_channel_dtmf_stream(bridge_channel, data);
2027  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
2028  bridge_channel_unsuspend(bridge_channel);
2029  break;
2032  bridge_channel_talking(bridge_channel,
2034  break;
2036  bridge_channel_suspend(bridge_channel);
2037  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
2038  bridge_channel_playfile(bridge_channel, data);
2039  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
2040  bridge_channel_unsuspend(bridge_channel);
2041  break;
2043  bridge_channel_suspend(bridge_channel);
2044  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
2045  bridge_channel_run_app(bridge_channel, data);
2046  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
2047  bridge_channel_unsuspend(bridge_channel);
2048  break;
2050  bridge_channel_do_callback(bridge_channel, data);
2051  break;
2053  bridge_channel_suspend(bridge_channel);
2054  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
2055  bridge_channel_park(bridge_channel, data);
2056  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
2057  bridge_channel_unsuspend(bridge_channel);
2058  break;
2060  bridge_channel_blind_transfer(bridge_channel, data);
2061  break;
2063  bridge_channel_attended_transfer(bridge_channel, data);
2064  break;
2065  default:
2066  break;
2067  }
2068 
2069  /* While invoking an action it is possible for the channel to be hung up. So
2070  * that the bridge respects this we check here and if hung up kick it out.
2071  */
2072  if (bridge_channel->chan && ast_check_hangup_locked(bridge_channel->chan)) {
2073  ast_bridge_channel_kick(bridge_channel, 0);
2074  }
2075 }
2076 
2077 /*!
2078  * \internal
2079  * \brief Check if a bridge should dissolve and do it.
2080  * \since 12.0.0
2081  *
2082  * \param bridge_channel Channel causing the check.
2083  *
2084  * \note On entry, bridge_channel->bridge is already locked.
2085  */
2086 static void bridge_channel_dissolve_check(struct ast_bridge_channel *bridge_channel)
2087 {
2088  struct ast_bridge *bridge = bridge_channel->bridge;
2089 
2090  if (bridge->dissolved) {
2091  return;
2092  }
2093 
2094  if (!bridge->num_channels
2096  /* Last channel leaving the bridge turns off the lights. */
2097  bridge_dissolve(bridge, ast_channel_hangupcause(bridge_channel->chan));
2098  return;
2099  }
2100 
2101  switch (bridge_channel->state) {
2103  /* Do we need to dissolve the bridge because this channel hung up? */
2105  || (bridge_channel->features->usable
2106  && ast_test_flag(&bridge_channel->features->feature_flags,
2108  bridge_dissolve(bridge, ast_channel_hangupcause(bridge_channel->chan));
2109  return;
2110  }
2111  break;
2112  default:
2113  break;
2114  }
2115 
2116  if (bridge->num_lonely && bridge->num_lonely == bridge->num_channels) {
2117  /*
2118  * This will start a chain reaction where each channel leaving
2119  * enters this function and causes the next to leave as long as
2120  * there aren't non-lonely channels in the bridge.
2121  */
2124  ast_channel_hangupcause(bridge_channel->chan));
2125  }
2126 }
2127 
2129 {
2130  struct ast_bridge *bridge = bridge_channel->bridge;
2131 
2132  if (!bridge_channel->in_bridge) {
2133  return;
2134  }
2135  bridge_channel->in_bridge = 0;
2136 
2137  ast_debug(1, "Bridge %s: pulling %p(%s)\n",
2138  bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan));
2139 
2140  ast_verb(3, "Channel %s left '%s' %s-bridge <%s>\n",
2141  ast_channel_name(bridge_channel->chan),
2142  bridge->technology->name,
2143  bridge->v_table->name,
2144  bridge->uniqueid);
2145 
2146  if (!bridge_channel->just_joined) {
2147  /* Tell the bridge technology we are leaving so they tear us down */
2148  ast_debug(1, "Bridge %s: %p(%s) is leaving %s technology\n",
2149  bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan),
2150  bridge->technology->name);
2151  if (bridge->technology->leave) {
2152  bridge->technology->leave(bridge, bridge_channel);
2153  }
2154  }
2155 
2156  /* Remove channel from the bridge */
2157  if (!bridge_channel->suspended) {
2158  --bridge->num_active;
2159  }
2161  --bridge->num_lonely;
2162  }
2163  --bridge->num_channels;
2164  AST_LIST_REMOVE(&bridge->channels, bridge_channel, entry);
2165 
2166  bridge_channel_dissolve_check(bridge_channel);
2167  bridge->v_table->pull(bridge, bridge_channel);
2168 
2169  ast_bridge_channel_clear_roles(bridge_channel);
2170 
2171  /* If we are not going to be hung up after leaving a bridge, and we were an
2172  * outgoing channel, clear the outgoing flag.
2173  */
2174  if (ast_test_flag(ast_channel_flags(bridge_channel->chan), AST_FLAG_OUTGOING)
2175  && (ast_channel_is_leaving_bridge(bridge_channel->chan)
2176  || bridge_channel->state == BRIDGE_CHANNEL_STATE_WAIT)) {
2177  ast_debug(2, "Channel %s will survive this bridge; clearing outgoing (dialed) flag\n", ast_channel_name(bridge_channel->chan));
2178  ast_channel_clear_flag(bridge_channel->chan, AST_FLAG_OUTGOING);
2179  }
2180 
2181  bridge->reconfigured = 1;
2182  ast_bridge_publish_leave(bridge, bridge_channel->chan);
2183 }
2184 
2185 int bridge_channel_internal_push_full(struct ast_bridge_channel *bridge_channel, int optimized)
2186 {
2187  struct ast_bridge *bridge = bridge_channel->bridge;
2188  struct ast_bridge_channel *swap;
2189 
2190  ast_assert(!bridge_channel->in_bridge);
2191 
2192  swap = bridge_find_channel(bridge, bridge_channel->swap);
2193  bridge_channel->swap = NULL;
2194 
2195  if (swap) {
2196  ast_debug(1, "Bridge %s: pushing %p(%s) by swapping with %p(%s)\n",
2197  bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan),
2198  swap, ast_channel_name(swap->chan));
2199  } else {
2200  ast_debug(1, "Bridge %s: pushing %p(%s)\n",
2201  bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan));
2202  }
2203 
2204  /* Add channel to the bridge */
2205  if (bridge->dissolved
2206  || bridge_channel->state != BRIDGE_CHANNEL_STATE_WAIT
2208  || bridge->v_table->push(bridge, bridge_channel, swap)) {
2209  ast_debug(1, "Bridge %s: pushing %p(%s) into bridge failed\n",
2210  bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan));
2211  return -1;
2212  }
2213 
2214  ast_bridge_channel_establish_roles(bridge_channel);
2215 
2216  if (swap) {
2218 
2219  /* This flag is cleared so the act of this channel leaving does not cause it to dissolve if need be */
2221 
2222  if (optimized) {
2224  }
2227 
2229  }
2230 
2231  bridge_channel->in_bridge = 1;
2232  bridge_channel->just_joined = 1;
2233  AST_LIST_INSERT_TAIL(&bridge->channels, bridge_channel, entry);
2234  ++bridge->num_channels;
2236  ++bridge->num_lonely;
2237  }
2238  if (!bridge_channel->suspended) {
2239  ++bridge->num_active;
2240  }
2241 
2242  ast_verb(3, "Channel %s %s%s%s '%s' %s-bridge <%s>\n",
2243  ast_channel_name(bridge_channel->chan),
2244  swap ? "swapped with " : "joined",
2245  swap ? ast_channel_name(swap->chan) : "",
2246  swap ? " into" : "",
2248  bridge->v_table->name,
2249  bridge->uniqueid);
2250 
2251  ast_bridge_publish_enter(bridge, bridge_channel->chan, swap ? swap->chan : NULL);
2252 
2253  /* Clear any BLINDTRANSFER,ATTENDEDTRANSFER and FORWARDERNAME since the transfer has completed. */
2254  pbx_builtin_setvar_helper(bridge_channel->chan, "BLINDTRANSFER", NULL);
2255  pbx_builtin_setvar_helper(bridge_channel->chan, "ATTENDEDTRANSFER", NULL);
2256  pbx_builtin_setvar_helper(bridge_channel->chan, "FORWARDERNAME", NULL);
2257 
2258  /* Wake up the bridge channel thread to reevaluate any interval timers. */
2259  ast_queue_frame(bridge_channel->chan, &ast_null_frame);
2260 
2261  bridge->reconfigured = 1;
2262  return 0;
2263 }
2264 
2266 {
2267  return bridge_channel_internal_push_full(bridge_channel, 0);
2268 }
2269 
2270 /*!
2271  * \internal
2272  * \brief Handle bridge channel control frame action.
2273  * \since 12.0.0
2274  *
2275  * \param bridge_channel Channel to execute the control frame action on.
2276  * \param fr Control frame to handle.
2277  */
2278 static void bridge_channel_handle_control(struct ast_bridge_channel *bridge_channel, struct ast_frame *fr)
2279 {
2280  struct ast_channel *chan;
2281  struct ast_option_header *aoh;
2282  int is_caller;
2283 
2284  chan = bridge_channel->chan;
2285  switch (fr->subclass.integer) {
2287  is_caller = !ast_test_flag(ast_channel_flags(chan), AST_FLAG_OUTGOING);
2288  if (ast_channel_redirecting_sub(NULL, chan, fr, 1) &&
2289  ast_channel_redirecting_macro(NULL, chan, fr, is_caller, 1)) {
2290  ast_indicate_data(chan, fr->subclass.integer, fr->data.ptr, fr->datalen);
2291  }
2292  break;
2294  is_caller = !ast_test_flag(ast_channel_flags(chan), AST_FLAG_OUTGOING);
2295  if (ast_channel_connected_line_sub(NULL, chan, fr, 1) &&
2296  ast_channel_connected_line_macro(NULL, chan, fr, is_caller, 1)) {
2297  ast_indicate_data(chan, fr->subclass.integer, fr->data.ptr, fr->datalen);
2298  }
2299  break;
2300  case AST_CONTROL_OPTION:
2301  /*
2302  * Forward option Requests, but only ones we know are safe These
2303  * are ONLY sent by chan_iax2 and I'm not convinced that they
2304  * are useful. I haven't deleted them entirely because I just am
2305  * not sure of the ramifications of removing them.
2306  */
2307  aoh = fr->data.ptr;
2308  if (aoh && aoh->flag == AST_OPTION_FLAG_REQUEST) {
2309  switch (ntohs(aoh->option)) {
2311  case AST_OPTION_TDD:
2312  case AST_OPTION_RELAXDTMF:
2313  case AST_OPTION_AUDIO_MODE:
2315  case AST_OPTION_FAX_DETECT:
2316  ast_channel_setoption(chan, ntohs(aoh->option), aoh->data,
2317  fr->datalen - sizeof(*aoh), 0);
2318  break;
2319  default:
2320  break;
2321  }
2322  }
2323  break;
2324  case AST_CONTROL_ANSWER:
2325  if (ast_channel_state(chan) != AST_STATE_UP) {
2326  ast_answer(chan);
2327  ast_bridge_channel_lock_bridge(bridge_channel);
2328  bridge_channel->bridge->reconfigured = 1;
2329  bridge_reconfigured(bridge_channel->bridge, 0);
2330  ast_bridge_unlock(bridge_channel->bridge);
2331  } else {
2332  ast_indicate(chan, -1);
2333  }
2334  break;
2336  /* Should never happen. */
2337  ast_assert(0);
2338  break;
2340  ast_indicate_data(chan, fr->subclass.integer, fr->data.ptr, fr->datalen);
2341  break;
2342  default:
2343  ast_indicate_data(chan, fr->subclass.integer, fr->data.ptr, fr->datalen);
2344  break;
2345  }
2346 }
2347 
2348 /*!
2349  * \internal
2350  * \brief Ensure text data is zero terminated before sending
2351  *
2352  * \param chan Channel to send text to
2353  * \param f The frame containing the text data to send
2354  */
2355 static void sendtext_safe(struct ast_channel *chan, const struct ast_frame *f)
2356 {
2357  if (f->datalen) {
2358  char *text = f->data.ptr;
2359 
2360  if (text[f->datalen - 1]) {
2361  /* Not zero terminated, we need to allocate */
2362  text = ast_strndup(text, f->datalen);
2363  if (!text) {
2364  return;
2365  }
2366  }
2367 
2368  ast_sendtext(chan, text);
2369 
2370  if (text != f->data.ptr) {
2371  /* Only free if we allocated */
2372  ast_free(text);
2373  }
2374  } else {
2375  /* Special case if the frame length is zero (although I
2376  * am not sure this is possible?) */
2377  ast_sendtext(chan, "");
2378  }
2379 }
2380 
2381 /*!
2382  * \internal
2383  * \brief Handle bridge channel write frame to channel.
2384  * \since 12.0.0
2385  *
2386  * \param bridge_channel Channel to write outgoing frame.
2387  */
2388 static void bridge_channel_handle_write(struct ast_bridge_channel *bridge_channel)
2389 {
2390  struct ast_frame *fr;
2391  struct sync_payload *sync_payload;
2392  int num;
2393  struct ast_msg_data *msg;
2394 
2395  ast_bridge_channel_lock(bridge_channel);
2396 
2397  /* It's not good to have unbalanced frames and alert_pipe alerts. */
2398  ast_assert(!AST_LIST_EMPTY(&bridge_channel->wr_queue));
2399  if (AST_LIST_EMPTY(&bridge_channel->wr_queue)) {
2400  /* No frame, flush the alert pipe of excess alerts. */
2401  ast_log(LOG_WARNING, "Weird. No frame from bridge for %s to process?\n",
2402  ast_channel_name(bridge_channel->chan));
2403  ast_alertpipe_read(bridge_channel->alert_pipe);
2404  ast_bridge_channel_unlock(bridge_channel);
2405  return;
2406  }
2407 
2408  AST_LIST_TRAVERSE_SAFE_BEGIN(&bridge_channel->wr_queue, fr, frame_list) {
2409  if (bridge_channel->dtmf_hook_state.collected[0]) {
2410  switch (fr->frametype) {
2413  /* Defer processing these frames while DTMF is collected. */
2414  continue;
2415  default:
2416  break;
2417  }
2418  }
2419  ast_alertpipe_read(bridge_channel->alert_pipe);
2421  break;
2422  }
2424 
2425  ast_bridge_channel_unlock(bridge_channel);
2426 
2427  if (!fr) {
2428  /*
2429  * Wait some to reduce CPU usage from a tight loop
2430  * without any wait because we only have deferred
2431  * frames in the wr_queue.
2432  */
2433  usleep(1);
2434  return;
2435  }
2436 
2437  switch (fr->frametype) {
2439  bridge_channel_handle_action(bridge_channel, fr->subclass.integer, fr->data.ptr);
2440  break;
2442  sync_payload = fr->data.ptr;
2444  break;
2445  case AST_FRAME_CONTROL:
2446  bridge_channel_handle_control(bridge_channel, fr);
2447  break;
2448  case AST_FRAME_NULL:
2449  break;
2450  case AST_FRAME_TEXT:
2451  ast_debug(1, "Sending TEXT frame to '%s': %*.s\n",
2452  ast_channel_name(bridge_channel->chan), fr->datalen, (char *)fr->data.ptr);
2453  sendtext_safe(bridge_channel->chan, fr);
2454  break;
2455  case AST_FRAME_TEXT_DATA:
2456  msg = (struct ast_msg_data *)fr->data.ptr;
2457  ast_debug(1, "Sending TEXT_DATA frame from '%s' to '%s:%s': %s\n",
2460  ast_channel_name(bridge_channel->chan),
2462  ast_sendtext_data(bridge_channel->chan, msg);
2463  break;
2464  default:
2465  /* Assume that there is no mapped stream for this */
2466  num = -1;
2467 
2468  if (fr->stream_num > -1) {
2469  ast_bridge_channel_lock(bridge_channel);
2470  if (fr->stream_num < (int)AST_VECTOR_SIZE(&bridge_channel->stream_map.to_channel)) {
2471  num = AST_VECTOR_GET(&bridge_channel->stream_map.to_channel, fr->stream_num);
2472  }
2473  ast_bridge_channel_unlock(bridge_channel);
2474 
2475  /* If there is no mapped stream after checking the mapping then there is nowhere
2476  * to write this frame to, so drop it.
2477  */
2478  if (num == -1) {
2479  break;
2480  }
2481  }
2482 
2483  /* Write the frame to the channel. */
2484  bridge_channel->activity = BRIDGE_CHANNEL_THREAD_SIMPLE;
2485  ast_write_stream(bridge_channel->chan, num, fr);
2486  break;
2487  }
2488  bridge_frame_free(fr);
2489 }
2490 
2491 /*!
2492  * \internal
2493  * \brief Handle DTMF from a channel
2494  */
2495 static struct ast_frame *bridge_handle_dtmf(struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
2496 {
2497  struct ast_bridge_features *features = bridge_channel->features;
2498  struct ast_bridge_hook_dtmf *hook = NULL;
2499  char dtmf[2];
2500 
2501  /*
2502  * See if we are already matching a DTMF feature hook sequence or
2503  * if this DTMF matches the beginning of any DTMF feature hooks.
2504  */
2505  dtmf[0] = frame->subclass.integer;
2506  dtmf[1] = '\0';
2507  if (bridge_channel->dtmf_hook_state.collected[0]
2508  || (hook = ao2_find(features->dtmf_hooks, dtmf, OBJ_SEARCH_PARTIAL_KEY))) {
2509  enum ast_frame_type frametype = frame->frametype;
2510 
2511  bridge_frame_free(frame);
2512  frame = NULL;
2513 
2514  ao2_cleanup(hook);
2515 
2516  switch (frametype) {
2517  case AST_FRAME_DTMF_BEGIN:
2518  /* Just eat the frame. */
2519  break;
2520  case AST_FRAME_DTMF_END:
2521  ast_bridge_channel_feature_digit(bridge_channel, dtmf[0]);
2522  break;
2523  default:
2524  /* Unexpected frame type. */
2525  ast_assert(0);
2526  break;
2527  }
2528 #ifdef TEST_FRAMEWORK
2529  } else if (frame->frametype == AST_FRAME_DTMF_END) {
2530  /* Only transmit this event on DTMF end or else every DTMF
2531  * press will result in the event being broadcast twice
2532  */
2533  ast_test_suite_event_notify("FEATURE_DETECTION", "Result: fail");
2534 #endif
2535  }
2536 
2537  return frame;
2538 }
2539 
2540 static const char *controls[] = {
2541  [AST_CONTROL_RINGING] = "RINGING",
2542  [AST_CONTROL_PROCEEDING] = "PROCEEDING",
2543  [AST_CONTROL_PROGRESS] = "PROGRESS",
2544  [AST_CONTROL_BUSY] = "BUSY",
2545  [AST_CONTROL_CONGESTION] = "CONGESTION",
2546  [AST_CONTROL_ANSWER] = "ANSWER",
2547 };
2548 
2549 /*!
2550  * \internal
2551  * \brief Feed notification that a frame is waiting on a channel into the bridging core
2552  *
2553  * \param bridge_channel Bridge channel the notification was received on
2554  */
2555 static void bridge_handle_trip(struct ast_bridge_channel *bridge_channel)
2556 {
2557  struct ast_frame *frame;
2558  int blocked;
2559 
2560  if (!ast_strlen_zero(ast_channel_call_forward(bridge_channel->chan))) {
2561  /* TODO If early bridging is ever used by anything other than ARI,
2562  * it's important that we actually attempt to handle the call forward
2563  * attempt, as well as expand features on a bridge channel to allow/disallow
2564  * call forwarding. For now, all we do is raise an event, showing that
2565  * a call forward is being attempted.
2566  */
2567  ast_channel_publish_dial_forward(NULL, bridge_channel->chan, NULL, NULL, "CANCEL",
2568  ast_channel_call_forward(bridge_channel->chan));
2569  }
2570 
2571  if (bridge_channel->features->mute) {
2572  frame = ast_read_stream_noaudio(bridge_channel->chan);
2573  } else {
2574  frame = ast_read_stream(bridge_channel->chan);
2575  }
2576 
2577  if (!frame) {
2578  ast_bridge_channel_kick(bridge_channel, 0);
2579  return;
2580  }
2581 
2582  if (!ast_channel_is_multistream(bridge_channel->chan)) {
2583  /* This may not be initialized by non-multistream channel drivers */
2584  frame->stream_num = -1;
2585  }
2586 
2587  switch (frame->frametype) {
2588  case AST_FRAME_CONTROL:
2589  switch (frame->subclass.integer) {
2591  case AST_CONTROL_BUSY:
2592  ast_channel_publish_dial(NULL, bridge_channel->chan, NULL, controls[frame->subclass.integer]);
2593  break;
2594  case AST_CONTROL_HANGUP:
2595  ast_bridge_channel_kick(bridge_channel, 0);
2596  bridge_frame_free(frame);
2597  return;
2598  case AST_CONTROL_RINGING:
2599  case AST_CONTROL_PROGRESS:
2601  case AST_CONTROL_ANSWER:
2602  ast_channel_publish_dial(NULL, bridge_channel->chan, NULL, controls[frame->subclass.integer]);
2603  break;
2605  ast_bridge_channel_lock_bridge(bridge_channel);
2606  blocked = bridge_channel->bridge->technology->stream_topology_request_change
2607  && bridge_channel->bridge->technology->stream_topology_request_change(
2608  bridge_channel->bridge, bridge_channel);
2609  ast_bridge_unlock(bridge_channel->bridge);
2610  if (blocked) {
2611  /*
2612  * Topology change was intercepted by the bridge technology
2613  * so drop frame.
2614  */
2615  bridge_frame_free(frame);
2616  return;
2617  }
2618  break;
2620  /*
2621  * If a stream topology has changed then the bridge_channel's
2622  * media mapping needs to be updated.
2623  */
2624  ast_bridge_channel_lock_bridge(bridge_channel);
2625  if (bridge_channel->bridge->technology->stream_topology_changed) {
2626  bridge_channel->bridge->technology->stream_topology_changed(
2627  bridge_channel->bridge, bridge_channel);
2628  } else {
2629  ast_bridge_channel_stream_map(bridge_channel);
2630  }
2631  ast_bridge_unlock(bridge_channel->bridge);
2632  break;
2633  default:
2634  break;
2635  }
2636  break;
2637  case AST_FRAME_DTMF_BEGIN:
2638  case AST_FRAME_DTMF_END:
2639  frame = bridge_handle_dtmf(bridge_channel, frame);
2640  if (!frame) {
2641  return;
2642  }
2643  if (!bridge_channel->features->dtmf_passthrough) {
2644  bridge_frame_free(frame);
2645  return;
2646  }
2647  break;
2648  default:
2649  break;
2650  }
2651 
2652  /* Simply write the frame out to the bridge technology. */
2653  bridge_channel_write_frame(bridge_channel, frame);
2654  bridge_frame_free(frame);
2655 }
2656 
2657 /*!
2658  * \internal
2659  * \brief Determine how long till the next timer interval.
2660  * \since 12.0.0
2661  *
2662  * \param bridge_channel Channel to determine how long can wait.
2663  *
2664  * \retval ms Number of milliseconds to wait.
2665  * \retval -1 to wait forever.
2666  */
2667 static int bridge_channel_next_interval(struct ast_bridge_channel *bridge_channel)
2668 {
2669  struct ast_heap *interval_hooks = bridge_channel->features->interval_hooks;
2670  struct ast_bridge_hook_timer *hook;
2671  int ms;
2672 
2673  ast_heap_wrlock(interval_hooks);
2674  hook = ast_heap_peek(interval_hooks, 1);
2675  if (hook) {
2676  ms = ast_tvdiff_ms(hook->timer.trip_time, ast_tvnow());
2677  if (ms < 0) {
2678  /* Expire immediately. An interval hook is ready to run. */
2679  ms = 0;
2680  }
2681  } else {
2682  /* No hook so wait forever. */
2683  ms = -1;
2684  }
2685  ast_heap_unlock(interval_hooks);
2686 
2687  return ms;
2688 }
2689 
2690 /*!
2691  * \internal
2692  * \brief Determine how long till the DTMF interdigit timeout.
2693  * \since 12.8.0
2694  *
2695  * \param bridge_channel Channel to determine how long can wait.
2696  *
2697  * \retval ms Number of milliseconds to wait.
2698  * \retval -1 to wait forever.
2699  */
2700 static int bridge_channel_feature_timeout(struct ast_bridge_channel *bridge_channel)
2701 {
2702  int ms;
2703 
2704  if (bridge_channel->dtmf_hook_state.collected[0]) {
2705  ms = ast_tvdiff_ms(bridge_channel->dtmf_hook_state.interdigit_timeout,
2706  ast_tvnow());
2707  if (ms < 0) {
2708  /* Expire immediately. */
2709  ms = 0;
2710  }
2711  } else {
2712  /* Timer is not active so wait forever. */
2713  ms = -1;
2714  }
2715 
2716  return ms;
2717 }
2718 
2719 /*!
2720  * \internal
2721  * \brief Determine how long till a timeout.
2722  * \since 12.8.0
2723  *
2724  * \param bridge_channel Channel to determine how long can wait.
2725  *
2726  * \retval ms Number of milliseconds to wait.
2727  * \retval -1 to wait forever.
2728  */
2729 static int bridge_channel_next_timeout(struct ast_bridge_channel *bridge_channel)
2730 {
2731  int ms_interval;
2732  int ms;
2733 
2734  ms_interval = bridge_channel_next_interval(bridge_channel);
2735  ms = bridge_channel_feature_timeout(bridge_channel);
2736  if (ms < 0 || (0 <= ms_interval && ms_interval < ms)) {
2737  /* Interval hook timeout is next. */
2738  ms = ms_interval;
2739  }
2740 
2741  return ms;
2742 }
2743 
2744 /*!
2745  * \internal
2746  * \brief Wait for something to happen on the bridge channel and handle it.
2747  * \since 12.0.0
2748  *
2749  * \param bridge_channel Channel to wait.
2750  *
2751  * \note Each channel does writing/reading in their own thread.
2752  */
2753 static void bridge_channel_wait(struct ast_bridge_channel *bridge_channel)
2754 {
2755  int ms;
2756  int outfd;
2757  struct ast_channel *chan;
2758 
2759  /* Wait for data to either come from the channel or us to be signaled */
2762  } else if (bridge_channel->suspended) {
2763 /* XXX ASTERISK-21271 the external party use of suspended will go away as will these references because this is the bridge channel thread */
2764  ast_debug(1, "Bridge %s: %p(%s) is going into a signal wait\n",
2768  } else {
2770  outfd = -1;
2773  &bridge_channel->alert_pipe[0], 1, NULL, &outfd, &ms);
2780  }
2786  if (chan) {
2788  } else if (ms == 0) {
2789  /* An interdigit timeout or interval expired. */
2792  } else if (-1 < outfd) {
2793  /*
2794  * Must do this after checking timeouts or may have
2795  * an infinite loop due to deferring write queue
2796  * actions while trying to match DTMF feature hooks.
2797  */
2799  }
2800  }
2802  return;
2803  }
2805 }
2806 
2807 /*!
2808  * \internal
2809  * \brief Handle bridge channel join/leave event.
2810  * \since 12.0.0
2811  *
2812  * \param bridge_channel Which channel is involved.
2813  * \param type Specified join/leave event.
2814  */
2816 {
2817  struct ast_bridge_features *features = bridge_channel->features;
2818  struct ast_bridge_hook *hook;
2819  struct ao2_iterator iter;
2820 
2821  /* Run the specified hooks. */
2822  iter = ao2_iterator_init(features->other_hooks, 0);
2823  for (; (hook = ao2_iterator_next(&iter)); ao2_ref(hook, -1)) {
2824  if (hook->type == type) {
2825  break;
2826  }
2827  }
2828  if (hook) {
2829  /* Found the first specified hook to run. */
2830  bridge_channel_suspend(bridge_channel);
2831  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
2832  do {
2833  if (hook->type == type) {
2834  hook->callback(bridge_channel, hook->hook_pvt);
2835  ao2_unlink(features->other_hooks, hook);
2836  }
2837  ao2_ref(hook, -1);
2838  } while ((hook = ao2_iterator_next(&iter)));
2839  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
2840  bridge_channel_unsuspend(bridge_channel);
2841  }
2842  ao2_iterator_destroy(&iter);
2843 }
2844 
2846 {
2847  int res = 0;
2848  uint8_t indicate_src_change = 0;
2849  struct ast_bridge_features *channel_features;
2850  struct ast_channel *peer;
2851  struct ast_channel *swap;
2852 
2853  ast_debug(1, "Bridge %s: %p(%s) is joining\n",
2856 
2857  /*
2858  * Directly locking the bridge is safe here because nobody else
2859  * knows about this bridge_channel yet.
2860  */
2862 
2865 
2866  if (peer) {
2867  struct ast_bridge *peer_bridge;
2868 
2869  ast_channel_unlock(bridge_channel->chan);
2870 
2871  ast_channel_lock(peer);
2872  peer_bridge = ast_channel_internal_bridge(peer);
2873  ast_channel_unlock(peer);
2874  ast_channel_unref(peer);
2875 
2876  /* As we are only doing a pointer comparison we don't need the peer_bridge
2877  * to be reference counted or locked.
2878  */
2879  if (peer_bridge == bridge_channel->bridge) {
2880  ast_bridge_unlock(bridge_channel->bridge);
2881  ast_debug(1, "Bridge %s: %p(%s) denying Bridge join to prevent Local channel loop\n",
2882  bridge_channel->bridge->uniqueid,
2883  bridge_channel,
2884  ast_channel_name(bridge_channel->chan));
2885  return -1;
2886  }
2887 
2888  ast_channel_lock(bridge_channel->chan);
2889  }
2890 
2891  bridge_channel->read_format = ao2_bump(ast_channel_readformat(bridge_channel->chan));
2892  bridge_channel->write_format = ao2_bump(ast_channel_writeformat(bridge_channel->chan));
2893 
2894  /* Make sure we're still good to be put into a bridge */
2895  if (ast_channel_internal_bridge(bridge_channel->chan)
2896  || ast_test_flag(ast_channel_flags(bridge_channel->chan), AST_FLAG_ZOMBIE)) {
2897  ast_channel_unlock(bridge_channel->chan);
2898  ast_bridge_unlock(bridge_channel->bridge);
2899  ast_debug(1, "Bridge %s: %p(%s) failed to join Bridge\n",
2900  bridge_channel->bridge->uniqueid,
2901  bridge_channel,
2902  ast_channel_name(bridge_channel->chan));
2903  return -1;
2904  }
2905  ast_channel_internal_bridge_set(bridge_channel->chan, bridge_channel->bridge);
2906 
2907  /* Attach features requested by the channel */
2908  channel_features = ast_channel_feature_hooks_get(bridge_channel->chan);
2909  if (channel_features) {
2910  ast_bridge_features_merge(bridge_channel->features, channel_features);
2911  }
2912  ast_channel_unlock(bridge_channel->chan);
2913 
2914  /* Add the jitterbuffer if the channel requires it */
2915  ast_jb_enable_for_channel(bridge_channel->chan);
2916 
2917  if (!bridge_channel->bridge->callid) {
2918  bridge_channel->bridge->callid = ast_read_threadstorage_callid();
2919  }
2920 
2921  /* Take the swap channel ref from the bridge_channel struct. */
2922  swap = bridge_channel->swap;
2923 
2924  if (bridge_channel_internal_push(bridge_channel)) {
2925  int cause = bridge_channel->bridge->cause;
2926 
2927  ast_bridge_unlock(bridge_channel->bridge);
2928  ast_bridge_channel_kick(bridge_channel, cause);
2929  ast_bridge_channel_lock_bridge(bridge_channel);
2930  ast_bridge_features_remove(bridge_channel->features,
2932  bridge_channel_dissolve_check(bridge_channel);
2933  res = -1;
2934  }
2935  bridge_reconfigured(bridge_channel->bridge, !bridge_channel->inhibit_colp);
2936 
2937  if (bridge_channel->state == BRIDGE_CHANNEL_STATE_WAIT) {
2938  /*
2939  * Indicate a source change since this channel is entering the
2940  * bridge system only if the bridge technology is not MULTIMIX
2941  * capable. The MULTIMIX technology has already done it.
2942  */
2943  if (!(bridge_channel->bridge->technology->capabilities
2945  indicate_src_change = 1;
2946  }
2947 
2948  bridge_channel_impart_signal(bridge_channel->chan);
2949  ast_bridge_unlock(bridge_channel->bridge);
2950 
2951  /* Must release any swap ref after unlocking the bridge. */
2952  ao2_t_cleanup(swap, "Bridge push with swap successful");
2953  swap = NULL;
2954 
2955  if (indicate_src_change) {
2956  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCCHANGE);
2957  }
2958 
2960 
2961  while (bridge_channel->state == BRIDGE_CHANNEL_STATE_WAIT) {
2962  /* Wait for something to do. */
2963  bridge_channel_wait(bridge_channel);
2964  }
2965 
2966  /* Force a timeout on any accumulated DTMF hook digits. */
2967  ast_bridge_channel_feature_digit(bridge_channel, 0);
2968 
2970  ast_bridge_channel_lock_bridge(bridge_channel);
2971  }
2972 
2973  bridge_channel_internal_pull(bridge_channel);
2974  bridge_channel_settle_owed_events(bridge_channel->bridge, bridge_channel);
2975  bridge_reconfigured(bridge_channel->bridge, 1);
2976 
2977  /* Remove ourselves if we are the video source */
2978  ast_bridge_remove_video_src(bridge_channel->bridge, bridge_channel->chan);
2979 
2980  ast_bridge_unlock(bridge_channel->bridge);
2981 
2982  /* Must release any swap ref after unlocking the bridge. */
2983  ao2_t_cleanup(swap, "Bridge push with swap failed or exited immediately");
2984 
2985  /* Complete any active hold before exiting the bridge. */
2986  if (ast_channel_hold_state(bridge_channel->chan) == AST_CONTROL_HOLD) {
2987  ast_debug(1, "Channel %s simulating UNHOLD for bridge end.\n",
2988  ast_channel_name(bridge_channel->chan));
2989  ast_indicate(bridge_channel->chan, AST_CONTROL_UNHOLD);
2990  }
2991 
2992  /* Complete any partial DTMF digit before exiting the bridge. */
2993  if (ast_channel_sending_dtmf_digit(bridge_channel->chan)) {
2994  ast_channel_end_dtmf(bridge_channel->chan,
2995  ast_channel_sending_dtmf_digit(bridge_channel->chan),
2996  ast_channel_sending_dtmf_tv(bridge_channel->chan), "bridge end");
2997  }
2998 
2999  /* Complete any T.38 session before exiting the bridge. */
3000  if (ast_channel_is_t38_active(bridge_channel->chan)) {
3001  struct ast_control_t38_parameters t38_parameters = {
3003  };
3004 
3005  ast_debug(1, "Channel %s simulating T.38 terminate for bridge end.\n",
3006  ast_channel_name(bridge_channel->chan));
3008  &t38_parameters, sizeof(t38_parameters));
3009  }
3010 
3011  /* Indicate a source change since this channel is leaving the bridge system. */
3012  ast_indicate(bridge_channel->chan, AST_CONTROL_SRCCHANGE);
3013 
3014  /*
3015  * Wait for any dual redirect to complete.
3016  *
3017  * Must be done while "still in the bridge" for ast_async_goto()
3018  * to work right.
3019  */
3021  sched_yield();
3022  }
3023  ast_channel_lock(bridge_channel->chan);
3024  ast_channel_internal_bridge_set(bridge_channel->chan, NULL);
3025  ast_channel_unlock(bridge_channel->chan);
3026 
3027  ast_bridge_channel_restore_formats(bridge_channel);
3028 
3029  return res;
3030 }
3031 
3033  const char *exten, const char *context,
3034  transfer_channel_cb new_channel_cb, void *user_data)
3035 {
3036  RAII_VAR(struct ast_bridge_channel *, transferee_bridge_channel, NULL, ao2_cleanup);
3037  struct blind_transfer_data blind_data;
3038 
3039  ast_channel_lock(transferee);
3040  transferee_bridge_channel = ast_channel_get_bridge_channel(transferee);
3041  ast_channel_unlock(transferee);
3042 
3043  if (!transferee_bridge_channel) {
3044  return -1;
3045  }
3046 
3047  if (new_channel_cb) {
3048  new_channel_cb(transferee, user_data, AST_BRIDGE_TRANSFER_SINGLE_PARTY);
3049  }
3050 
3051  ast_copy_string(blind_data.exten, exten, sizeof(blind_data.exten));
3052  ast_copy_string(blind_data.context, context, sizeof(blind_data.context));
3053 
3054  return bridge_channel_queue_action_data(transferee_bridge_channel,
3055  BRIDGE_CHANNEL_ACTION_BLIND_TRANSFER, &blind_data, sizeof(blind_data));
3056 }
3057 
3059  struct ast_channel *unbridged_chan)
3060 {
3061  RAII_VAR(struct ast_bridge_channel *, transferee_bridge_channel, NULL, ao2_cleanup);
3062  char unbridged_chan_name[AST_CHANNEL_NAME];
3063 
3064  ast_channel_lock(transferee);
3065  transferee_bridge_channel = ast_channel_get_bridge_channel(transferee);
3066  ast_channel_unlock(transferee);
3067 
3068  if (!transferee_bridge_channel) {
3069  return -1;
3070  }
3071 
3072  ast_copy_string(unbridged_chan_name, ast_channel_name(unbridged_chan),
3073  sizeof(unbridged_chan_name));
3074 
3075  return bridge_channel_queue_action_data(transferee_bridge_channel,
3076  BRIDGE_CHANNEL_ACTION_ATTENDED_TRANSFER, unbridged_chan_name,
3077  sizeof(unbridged_chan_name));
3078 }
3079 
3081 {
3082  return bridge_channel->in_bridge
3083  && AST_LIST_EMPTY(&bridge_channel->wr_queue);
3084 }
3085 
3086 /* Destroy elements of the bridge channel structure and the bridge channel structure itself */
3087 static void bridge_channel_destroy(void *obj)
3088 {
3089  struct ast_bridge_channel *bridge_channel = obj;
3090  struct ast_frame *fr;
3091 
3092  if (bridge_channel->callid) {
3093  bridge_channel->callid = 0;
3094  }
3095 
3096  if (bridge_channel->bridge) {
3097  ao2_ref(bridge_channel->bridge, -1);
3098  bridge_channel->bridge = NULL;
3099  }
3100 
3101  /* Flush any unhandled wr_queue frames. */
3102  while ((fr = AST_LIST_REMOVE_HEAD(&bridge_channel->wr_queue, frame_list))) {
3103  bridge_frame_free(fr);
3104  }
3105  ast_alertpipe_close(bridge_channel->alert_pipe);
3106 
3107  /* Flush any unhandled deferred_queue frames. */
3108  while ((fr = AST_LIST_REMOVE_HEAD(&bridge_channel->deferred_queue, frame_list))) {
3109  ast_frfree(fr);
3110  }
3111 
3112  ast_cond_destroy(&bridge_channel->cond);
3113 
3114  ao2_cleanup(bridge_channel->write_format);
3115  ao2_cleanup(bridge_channel->read_format);
3116 
3117  AST_VECTOR_FREE(&bridge_channel->stream_map.to_bridge);
3118  AST_VECTOR_FREE(&bridge_channel->stream_map.to_channel);
3119 }
3120 
3122 {
3123  struct ast_bridge_channel *bridge_channel;
3124 
3125  bridge_channel = ao2_alloc(sizeof(struct ast_bridge_channel), bridge_channel_destroy);
3126  if (!bridge_channel) {
3127  return NULL;
3128  }
3129  ast_cond_init(&bridge_channel->cond, NULL);
3130  if (ast_alertpipe_init(bridge_channel->alert_pipe)) {
3131  ao2_ref(bridge_channel, -1);
3132  return NULL;
3133  }
3134  if (bridge) {
3135  bridge_channel->bridge = bridge;
3136  ao2_ref(bridge_channel->bridge, +1);
3137  }
3138 
3139  /* The stream_map is initialized later - see ast_bridge_channel_stream_map */
3140 
3141  return bridge_channel;
3142 }
3143 
3145 {
3146  ast_bridge_channel_lock(bridge_channel);
3147  ast_channel_lock(bridge_channel->chan);
3149  &bridge_channel->bridge->media_types, &bridge_channel->stream_map.to_bridge,
3150  &bridge_channel->stream_map.to_channel);
3151  ast_channel_unlock(bridge_channel->chan);
3152  ast_bridge_channel_unlock(bridge_channel);
3153 }
void ast_jb_enable_for_channel(struct ast_channel *chan)
Sets a jitterbuffer frame hook on the channel based on the channel's stored jitterbuffer configuratio...
Definition: abstract_jb.c:585
void ast_alertpipe_close(int alert_pipe[2])
Close an alert pipe.
Definition: alertpipe.c:79
ssize_t ast_alertpipe_write(int alert_pipe[2])
Write an event to an alert pipe.
Definition: alertpipe.c:120
int ast_alertpipe_init(int alert_pipe[2])
Initialize an alert pipe.
Definition: alertpipe.c:38
ast_alert_status_t ast_alertpipe_read(int alert_pipe[2])
Read an event from an alert pipe.
Definition: alertpipe.c:102
static const char app[]
Definition: app_adsiprog.c:56
char digit
struct sla_ringing_trunk * first
Definition: app_meetme.c:1094
char * text
Definition: app_queue.c:1641
enum queue_result id
Definition: app_queue.c:1640
Asterisk main include file. File version handling, generic pbx functions.
#define ast_alloca(size)
call __builtin_alloca to ensure we get gcc builtin semantics
Definition: astmm.h:288
#define ast_free(a)
Definition: astmm.h:180
#define ast_strndup(str, len)
A wrapper for strndup()
Definition: astmm.h:256
#define ast_strdupa(s)
duplicate a string in memory from the stack
Definition: astmm.h:298
#define ast_log
Definition: astobj2.c:42
#define ao2_iterator_next(iter)
Definition: astobj2.h:1911
void * ao2_object_get_lockaddr(void *obj)
Return the mutex lock address of an object.
Definition: astobj2.c:476
#define ao2_cleanup(obj)
Definition: astobj2.h:1934
#define ao2_unlink(container, obj)
Remove an object from a container.
Definition: astobj2.h:1578
#define ao2_find(container, arg, flags)
Definition: astobj2.h:1736
struct ao2_iterator ao2_iterator_init(struct ao2_container *c, int flags) attribute_warn_unused_result
Create an iterator for a container.
#define ao2_unlock(a)
Definition: astobj2.h:729
#define ao2_lock(a)
Definition: astobj2.h:717
#define ao2_ref(o, delta)
Reference/unreference an object and return the old refcount.
Definition: astobj2.h:459
#define ao2_t_cleanup(obj, tag)
Definition: astobj2.h:1935
#define ao2_bump(obj)
Bump refcount on an AO2 object by one, returning the object.
Definition: astobj2.h:480
void ao2_iterator_destroy(struct ao2_iterator *iter)
Destroy a container iterator.
@ OBJ_SEARCH_PARTIAL_KEY
The arg parameter is a partial search key similar to OBJ_SEARCH_KEY.
Definition: astobj2.h:1116
#define ao2_alloc(data_size, destructor_fn)
Definition: astobj2.h:409
Bridging API.
void ast_bridge_features_remove(struct ast_bridge_features *features, enum ast_bridge_hook_remove_flags flags)
Remove marked bridge channel feature hooks.
Definition: bridge.c:3501
#define ast_bridge_unlock(bridge)
Unlock the bridge.
Definition: bridge.h:481
void ast_bridge_vars_set(struct ast_channel *chan, const char *name, const char *pvtid)
Sets BRIDGECHANNEL and BRIDGEPVTCALLID for a channel.
Definition: bridge.c:1212
@ AST_BRIDGE_CAPABILITY_MULTIMIX
Definition: bridge.h:94
@ AST_BRIDGE_TRANSFER_SINGLE_PARTY
Definition: bridge.h:1111
void(* transfer_channel_cb)(struct ast_channel *chan, struct transfer_channel_data *user_data, enum ast_transfer_type transfer_type)
Callback function type called during blind transfers.
Definition: bridge.h:1143
void ast_bridge_remove_video_src(struct ast_bridge *bridge, struct ast_channel *chan)
remove a channel as a source of video for the bridge.
Definition: bridge.c:3917
#define ast_bridge_lock(bridge)
Lock the bridge.
Definition: bridge.h:470
After Bridge Execution API.
ast_bridge_after_cb_reason
Definition: bridge_after.h:37
const char * ast_bridge_after_cb_reason_string(enum ast_bridge_after_cb_reason reason)
Get a string representation of an after bridge callback reason.
Definition: bridge_after.c:288
int ast_bridge_set_after_callback(struct ast_channel *chan, ast_bridge_after_cb callback, ast_bridge_after_cb_failed failed, void *data)
Setup an after bridge callback for when the channel leaves the bridging system.
Definition: bridge_after.c:251
void ast_bridge_channel_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
Play a file on the bridge channel.
static void bridge_handle_trip(struct ast_bridge_channel *bridge_channel)
int ast_bridge_channel_write_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class)
Write a bridge action run application frame into the bridge.
struct ast_bridge_channel * ast_bridge_channel_peer(struct ast_bridge_channel *bridge_channel)
Get the peer bridge channel of a two party bridge.
static void bridge_sync_init(struct bridge_sync *sync_struct, unsigned int id)
Initialize a synchronous bridge object.
void ast_bridge_channel_run_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class)
Run an application on the bridge channel.
static int bridge_channel_next_timeout(struct ast_bridge_channel *bridge_channel)
void bridge_channel_internal_unsuspend_nolock(struct ast_bridge_channel *bridge_channel)
void ast_bridge_channel_update_linkedids(struct ast_bridge_channel *bridge_channel, struct ast_bridge_channel *swap)
void ast_bridge_channel_feature_digit_add(struct ast_bridge_channel *bridge_channel, int digit)
Add a DTMF digit to the collected digits.
static void bridge_channel_cancel_owed_events(struct ast_bridge_channel *bridge_channel)
static void sendtext_safe(struct ast_channel *chan, const struct ast_frame *f)
static int channel_set_cause(struct ast_channel *chan, int cause)
static void bridge_channel_update_accountcodes_joining(struct ast_bridge_channel *joining, struct ast_bridge_channel *swap)
static void bridge_frame_free(struct ast_frame *frame)
static void channel_fill_empty_peeraccount(struct ast_channel *dest, struct ast_channel *src)
static void channel_update_peeraccount(struct ast_channel *dest, struct ast_channel *src)
static void testsuite_notify_feature_success(struct ast_channel *chan, const char *dtmf)
void bridge_channel_internal_suspend_nolock(struct ast_bridge_channel *bridge_channel)
static void channel_fill_empty_accountcode(struct ast_channel *dest, struct ast_channel *src)
struct ast_bridge_channel * bridge_channel_internal_alloc(struct ast_bridge *bridge)
void bridge_channel_settle_owed_events(struct ast_bridge *orig_bridge, struct ast_bridge_channel *bridge_channel)
int ast_bridge_channel_write_unhold(struct ast_bridge_channel *bridge_channel)
Write an unhold frame into the bridge.
static void bridge_channel_run_app(struct ast_bridge_channel *bridge_channel, struct bridge_run_app *data)
int ast_bridge_channel_queue_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class)
Queue a bridge action run application frame onto the bridge channel.
int bridge_channel_internal_push_full(struct ast_bridge_channel *bridge_channel, int optimized)
void ast_bridge_channel_update_accountcodes(struct ast_bridge_channel *joining, struct ast_bridge_channel *leaving)
int bridge_channel_internal_queue_blind_transfer(struct ast_channel *transferee, const char *exten, const char *context, transfer_channel_cb new_channel_cb, void *user_data)
static void bridge_channel_attended_transfer(struct ast_bridge_channel *bridge_channel, const char *target_chan_name)
static void bridge_channel_do_callback(struct ast_bridge_channel *bridge_channel, struct bridge_custom_callback *data)
static void channel_set_empty_accountcodes(struct ast_channel *c0, struct ast_channel *c1)
static void after_bridge_move_channel_fail(enum ast_bridge_after_cb_reason reason, void *data)
void ast_bridge_channel_feature_digit(struct ast_bridge_channel *bridge_channel, int digit)
Add a DTMF digit to the collected digits to match against DTMF features.
static const char * controls[]
static int bridge_channel_queue_action_data(struct ast_bridge_channel *bridge_channel, enum bridge_channel_action_type action, const void *data, size_t datalen)
static void bridge_channel_wait(struct ast_bridge_channel *bridge_channel)
static void bridge_channel_destroy(void *obj)
void ast_bridge_channel_lock_bridge(struct ast_bridge_channel *bridge_channel)
Lock the bridge associated with the bridge channel.
void ast_bridge_channel_kick(struct ast_bridge_channel *bridge_channel, int cause)
Kick the channel out of the bridge.
static int bridge_channel_queue_action_data_sync(struct ast_bridge_channel *bridge_channel, enum bridge_channel_action_type action, const void *data, size_t datalen)
int ast_bridge_channel_notify_talking(struct ast_bridge_channel *bridge_channel, int started_talking)
Lets the bridging indicate when a bridge channel has stopped or started talking.
static void bridge_channel_handle_interval(struct ast_bridge_channel *bridge_channel)
static void bridge_channel_unsuspend(struct ast_bridge_channel *bridge_channel)
static int bridge_channel_feature_timeout(struct ast_bridge_channel *bridge_channel)
static void bridge_channel_poke(struct ast_bridge_channel *bridge_channel)
int bridge_channel_internal_push(struct ast_bridge_channel *bridge_channel)
static void bridge_channel_dissolve_check(struct ast_bridge_channel *bridge_channel)
static void bridge_channel_event_join_leave(struct ast_bridge_channel *bridge_channel, enum ast_bridge_hook_type type)
int ast_bridge_channel_write_control_data(struct ast_bridge_channel *bridge_channel, enum ast_control_frame_type control, const void *data, size_t datalen)
Write a control frame into the bridge with data.
static void bridge_channel_dtmf_stream(struct ast_bridge_channel *bridge_channel, const char *dtmf)
static void bridge_channel_handle_write(struct ast_bridge_channel *bridge_channel)
int bridge_channel_internal_allows_optimization(struct ast_bridge_channel *bridge_channel)
static int bridge_channel_write_frame(struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
void ast_bridge_channel_stream_map(struct ast_bridge_channel *bridge_channel)
Maps a channel's stream topology to and from the bridge.
static void bridge_channel_blind_transfer(struct ast_bridge_channel *bridge_channel, struct blind_transfer_data *blind_data)
int bridge_channel_internal_queue_attended_transfer(struct ast_channel *transferee, struct ast_channel *unbridged_chan)
static void bridge_channel_park(struct ast_bridge_channel *bridge_channel, struct bridge_park *payload)
static void bridge_sync_wait(struct bridge_sync *sync_struct)
Wait for a synchronous bridge action to complete.
struct ast_bridge * ast_bridge_channel_merge_inhibit(struct ast_bridge_channel *bridge_channel, int request)
Adjust the bridge_channel's bridge merge inhibit request count.
static void bridge_channel_handle_feature_timeout(struct ast_bridge_channel *bridge_channel)
static void bridge_sync_cleanup(struct bridge_sync *sync_struct)
Clean up a synchronization bridge object.
void ast_bridge_channel_leave_bridge_nolock(struct ast_bridge_channel *bridge_channel, enum bridge_channel_state new_state, int cause)
Set bridge channel state to leave bridge (if not leaving already).
static int bridge_channel_write_action_data(struct ast_bridge_channel *bridge_channel, enum bridge_channel_action_type action, const void *data, size_t datalen)
static struct ast_frame * bridge_handle_dtmf(struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
int ast_bridge_channel_queue_frame(struct ast_bridge_channel *bridge_channel, struct ast_frame *fr)
Write a frame to the specified bridge_channel.
void bridge_channel_internal_pull(struct ast_bridge_channel *bridge_channel)
int ast_bridge_channel_queue_control_data(struct ast_bridge_channel *bridge_channel, enum ast_control_frame_type control, const void *data, size_t datalen)
Queue a control frame onto the bridge channel with data.
static void after_bridge_move_channel(struct ast_channel *chan_bridged, void *data)
int ast_bridge_channel_queue_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
Queue a bridge action play file frame onto the bridge channel.
static void bridge_channel_update_accountcodes_leaving(struct ast_bridge_channel *leaving)
void ast_bridge_channel_restore_formats(struct ast_bridge_channel *bridge_channel)
Restore the formats of a bridge channel's channel to how they were before bridge_channel_internal_joi...
int ast_bridge_channel_queue_playfile_sync(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
Synchronously queue a bridge action play file frame onto the bridge channel.
int bridge_channel_internal_join(struct ast_bridge_channel *bridge_channel)
static int sync_ids
Counter used for assigning synchronous bridge action IDs.
static int payload_helper_app(ast_bridge_channel_post_action_data post_it, struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class)
#define PLAYBACK_TIMEOUT
Failsafe for synchronous bridge action waiting.
static int payload_helper_playfile(ast_bridge_channel_post_action_data post_it, struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
int ast_bridge_channel_write_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
Write a bridge action play file frame into the bridge.
void ast_bridge_channel_leave_bridge(struct ast_bridge_channel *bridge_channel, enum bridge_channel_state new_state, int cause)
Set bridge channel state to leave bridge (if not leaving already).
static void bridge_channel_playfile(struct ast_bridge_channel *bridge_channel, struct bridge_playfile *payload)
int ast_bridge_channel_write_hold(struct ast_bridge_channel *bridge_channel, const char *moh_class)
Write a hold frame into the bridge.
int ast_bridge_channel_queue_callback(struct ast_bridge_channel *bridge_channel, enum ast_bridge_channel_custom_callback_option flags, ast_bridge_custom_callback_fn callback, const void *payload, size_t payload_size)
Queue a bridge action custom callback frame onto the bridge channel.
static void bridge_channel_handle_control(struct ast_bridge_channel *bridge_channel, struct ast_frame *fr)
int ast_bridge_channel_write_callback(struct ast_bridge_channel *bridge_channel, enum ast_bridge_channel_custom_callback_option flags, ast_bridge_custom_callback_fn callback, const void *payload, size_t payload_size)
Write a bridge action custom callback frame into the bridge.
struct ast_channel * ast_bridge_channel_get_chan(struct ast_bridge_channel *bridge_channel)
Get a ref to the bridge_channel's ast_channel.
static int run_app_helper(struct ast_channel *chan, const char *app_name, const char *app_args)
static void bridge_sync_signal(struct bridge_sync *sync_struct)
Signal that waiting for a synchronous bridge action is no longer necessary.
static void bridge_channel_talking(struct ast_bridge_channel *bridge_channel, int talking)
int(* ast_bridge_channel_post_action_data)(struct ast_bridge_channel *bridge_channel, enum bridge_channel_action_type action, const void *data, size_t datalen)
Used to queue an action frame onto a bridge channel and write an action frame into a bridge.
static void bridge_channel_suspend(struct ast_bridge_channel *bridge_channel)
static int bridge_channel_write_dtmf_stream(struct ast_bridge_channel *bridge_channel, const char *dtmf)
static unsigned int bridge_channel_feature_digit_timeout(struct ast_bridge_channel *bridge_channel)
static int payload_helper_park(ast_bridge_channel_post_action_data post_it, struct ast_bridge_channel *bridge_channel, const char *parkee_uuid, const char *parker_uuid, const char *app_data)
static int bridge_channel_feature_digit_add(struct ast_bridge_channel *bridge_channel, int digit, size_t dtmf_len)
void bridge_channel_queue_deferred_frames(struct ast_bridge_channel *bridge_channel)
int ast_bridge_queue_everyone_else(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
Queue the given frame to everyone else.
static int bridge_channel_next_interval(struct ast_bridge_channel *bridge_channel)
static void bridge_channel_handle_action(struct ast_bridge_channel *bridge_channel, enum bridge_channel_action_type action, void *data)
int ast_bridge_channel_write_park(struct ast_bridge_channel *bridge_channel, const char *parkee_uuid, const char *parker_uuid, const char *app_data)
Have a bridge channel park a channel in the bridge.
static void channel_update_peeraccounts(struct ast_channel *c0, struct ast_channel *c1)
static int payload_helper_cb(ast_bridge_channel_post_action_data post_it, struct ast_bridge_channel *bridge_channel, enum ast_bridge_channel_custom_callback_option flags, ast_bridge_custom_callback_fn callback, const void *payload, size_t payload_size)
ast_bridge_channel_custom_callback_option
@ AST_BRIDGE_CHANNEL_CB_OPTION_MEDIA
#define ast_bridge_channel_unlock(bridge_channel)
Unlock the bridge_channel.
void(* ast_bridge_custom_callback_fn)(struct ast_bridge_channel *bridge_channel, const void *payload, size_t payload_size)
Custom callback run on a bridge channel.
#define ast_bridge_channel_lock(bridge_channel)
Lock the bridge_channel.
bridge_channel_state
State information about a bridged channel.
@ BRIDGE_CHANNEL_STATE_END_NO_DISSOLVE
@ BRIDGE_CHANNEL_STATE_WAIT
@ BRIDGE_CHANNEL_STATE_END
@ BRIDGE_CHANNEL_THREAD_FRAME
@ BRIDGE_CHANNEL_THREAD_SIMPLE
@ BRIDGE_CHANNEL_THREAD_IDLE
void(* ast_bridge_custom_play_fn)(struct ast_bridge_channel *bridge_channel, const char *playfile)
Custom interpretation of the playfile name.
Private Bridging Channel API.
void bridge_channel_impart_signal(struct ast_channel *chan)
Definition: bridge.c:1582
bridge_channel_action_type
@ BRIDGE_CHANNEL_ACTION_ATTENDED_TRANSFER
@ BRIDGE_CHANNEL_ACTION_DTMF_STREAM
@ BRIDGE_CHANNEL_ACTION_TALKING_STOP
@ BRIDGE_CHANNEL_ACTION_PLAY_FILE
@ BRIDGE_CHANNEL_ACTION_TALKING_START
@ BRIDGE_CHANNEL_ACTION_BLIND_TRANSFER
@ BRIDGE_CHANNEL_ACTION_CALLBACK
@ BRIDGE_CHANNEL_ACTION_RUN_APP
@ BRIDGE_CHANNEL_ACTION_PARK
ast_bridge_hook_type
@ AST_BRIDGE_HOOK_TYPE_JOIN
@ AST_BRIDGE_HOOK_TYPE_HANGUP
@ AST_BRIDGE_HOOK_TYPE_LEAVE
@ AST_BRIDGE_HOOK_TYPE_TALK
@ AST_BRIDGE_HOOK_REMOVE_ON_PULL
@ AST_BRIDGE_FLAG_DISSOLVE_EMPTY
@ AST_BRIDGE_FLAG_DISSOLVE_HANGUP
void ast_bridge_features_merge(struct ast_bridge_features *into, const struct ast_bridge_features *from)
Merge one ast_bridge_features into another.
Definition: bridge.c:3595
@ AST_BRIDGE_HOOK_TIMER_OPTION_MEDIA
int(* ast_bridge_talking_indicate_callback)(struct ast_bridge_channel *bridge_channel, void *hook_pvt, int talking)
Talking indicator callback.
@ AST_BRIDGE_CHANNEL_FLAG_LONELY
@ AST_BRIDGE_CHANNEL_FLAG_DISSOLVE_HANGUP
Private Bridging API.
void bridge_dissolve(struct ast_bridge *bridge, int cause)
Definition: bridge.c:315
void bridge_reconfigured(struct ast_bridge *bridge, unsigned int colp_update)
Definition: bridge.c:1403
void bridge_merge_inhibit_nolock(struct ast_bridge *bridge, int request)
Definition: bridge.c:2991
struct ast_bridge_channel * bridge_find_channel(struct ast_bridge *bridge, struct ast_channel *chan)
Definition: bridge.c:1429
int ast_bridge_channel_establish_roles(struct ast_bridge_channel *bridge_channel)
Clone the roles from a bridge_channel's attached ast_channel onto the bridge_channel's role list.
Definition: bridge_roles.c:443
void ast_bridge_channel_clear_roles(struct ast_bridge_channel *bridge_channel)
Clear all roles from a bridge_channel's role list.
Definition: bridge_roles.c:491
Internal Asterisk hangup causes.
#define AST_CAUSE_NORMAL_CLEARING
Definition: causes.h:106
static char exten[AST_MAX_EXTENSION]
Definition: chan_alsa.c:122
static char context[AST_MAX_CONTEXT]
Definition: chan_alsa.c:120
static const char type[]
Definition: chan_ooh323.c:109
static int request(void *obj)
Definition: chan_pjsip.c:2580
General Asterisk PBX channel definitions.
const char * ast_channel_latest_musicclass(const struct ast_channel *chan)
void ast_channel_end_dtmf(struct ast_channel *chan, char digit, struct timeval start, const char *why)
Simulate a DTMF end on a broken bridge channel.
Definition: channel.c:11055
void ast_channel_internal_copy_linkedid(struct ast_channel *dest, struct ast_channel *source)
Copy the full linkedid channel id structure from one channel to another.
struct ast_party_connected_line * ast_channel_connected(struct ast_channel *chan)
const char * ast_channel_accountcode(const struct ast_channel *chan)
void ast_channel_clear_flag(struct ast_channel *chan, unsigned int flag)
Clear a flag on a channel.
Definition: channel.c:11220
struct ast_format * ast_channel_writeformat(struct ast_channel *chan)
int ast_channel_connected_line_sub(struct ast_channel *autoservice_chan, struct ast_channel *sub_chan, const void *connected_info, int frame)
Run a connected line interception subroutine and update a channel's connected line information.
Definition: channel.c:10524
struct ast_bridge * ast_channel_internal_bridge(const struct ast_channel *chan)
struct ast_channel * ast_waitfor_nandfds(struct ast_channel **c, int n, int *fds, int nfds, int *exception, int *outfd, int *ms)
Waits for activity on a group of channels.
Definition: channel.c:2989
@ AST_SOFTHANGUP_DEV
Definition: channel.h:1121
void ast_party_connected_line_free(struct ast_party_connected_line *doomed)
Destroy the connected line information contents.
Definition: channel.c:2066
int ast_sendtext_data(struct ast_channel *chan, struct ast_msg_data *msg)
Sends text to a channel in an ast_msg_data structure wrapper with ast_sendtext as fallback.
Definition: channel.c:4786
struct ast_frame * ast_read_stream(struct ast_channel *chan)
Reads a frame, but does not filter to just the default streams.
Definition: channel.c:4297
#define ast_channel_lock(chan)
Definition: channel.h:2922
struct timeval ast_channel_sending_dtmf_tv(const struct ast_channel *chan)
int ast_queue_frame_head(struct ast_channel *chan, struct ast_frame *f)
Queue one or more frames to the head of a channel's frame queue.
Definition: channel.c:1138
void ast_party_connected_line_copy(struct ast_party_connected_line *dest, const struct ast_party_connected_line *src)
Copy the source connected line information to the destination connected line.
Definition: channel.c:2025
#define ast_channel_ref(c)
Increase channel reference count.
Definition: channel.h:2947
#define ast_channel_lock_both(chan1, chan2)
Lock two channels.
Definition: channel.h:2929
struct ast_channel * ast_channel_internal_oldest_linkedid(struct ast_channel *a, struct ast_channel *b)
Determine which channel has an older linkedid.
int ast_queue_frame(struct ast_channel *chan, struct ast_frame *f)
Queue one or more frames to a channel's frame queue.
Definition: channel.c:1133
int ast_channel_redirecting_macro(struct ast_channel *autoservice_chan, struct ast_channel *macro_chan, const void *redirecting_info, int is_caller, int is_frame)
Run a redirecting interception macro and update a channel's redirecting information.
Definition: channel.c:10472
int ast_check_hangup_locked(struct ast_channel *chan)
Definition: channel.c:459
const char * ast_channel_name(const struct ast_channel *chan)
int ast_queue_control_data(struct ast_channel *chan, enum ast_control_frame_type control, const void *data, size_t datalen)
Queue a control frame with payload.
Definition: channel.c:1232
int ast_channel_move(struct ast_channel *dest, struct ast_channel *source)
Move a channel from its current location to a new location.
Definition: channel.c:10852
const char * ast_channel_peeraccount(const struct ast_channel *chan)
int ast_sendtext(struct ast_channel *chan, const char *text)
Sends text to a channel.
Definition: channel.c:4844
@ AST_FLAG_BRIDGE_DUAL_REDIRECT_WAIT
Definition: channel.h:1035
@ AST_FLAG_ZOMBIE
Definition: channel.h:987
@ AST_FLAG_OUTGOING
Definition: channel.h:999
@ AST_FLAG_MOH
Definition: channel.h:991
int ast_channel_redirecting_sub(struct ast_channel *autoservice_chan, struct ast_channel *sub_chan, const void *redirecting_info, int is_frame)
Run a redirecting interception subroutine and update a channel's redirecting information.
Definition: channel.c:10569
int ast_set_read_format(struct ast_channel *chan, struct ast_format *format)
Sets read format on channel chan.
Definition: channel.c:5839
struct ast_flags * ast_channel_flags(struct ast_channel *chan)
void ast_channel_internal_bridge_set(struct ast_channel *chan, struct ast_bridge *value)
struct ast_bridge_channel * ast_channel_get_bridge_channel(struct ast_channel *chan)
Get a reference to the channel's bridge pointer.
Definition: channel.c:10768
void ast_channel_set_unbridged(struct ast_channel *chan, int value)
Sets the unbridged flag and queues a NULL frame on the channel to trigger a check by bridge_channel_w...
int ast_channel_hangupcause(const struct ast_channel *chan)
int ast_indicate_data(struct ast_channel *chan, int condition, const void *data, size_t datalen)
Indicates condition of channel, with payload.
Definition: channel.c:4688
int ast_channel_connected_line_macro(struct ast_channel *autoservice_chan, struct ast_channel *macro_chan, const void *connected_info, int is_caller, int frame)
Run a connected line interception macro and update a channel's connected line information.
Definition: channel.c:10420
int ast_softhangup(struct ast_channel *chan, int cause)
Softly hangup up a channel.
Definition: channel.c:2470
struct ast_format * ast_channel_readformat(struct ast_channel *chan)
void ast_party_id_reset(struct ast_party_id *id)
Destroy and initialize the given party id structure.
Definition: channel.c:1890
int ast_connected_line_build_data(unsigned char *data, size_t datalen, const struct ast_party_connected_line *connected, const struct ast_set_party_connected_line *update)
Build the connected line information data frame.
Definition: channel.c:8780
struct ast_frame * ast_read_stream_noaudio(struct ast_channel *chan)
Reads a frame, but does not filter to just the default streams, returning AST_FRAME_NULL frame if aud...
Definition: channel.c:4307
struct ast_bridge_features * ast_channel_feature_hooks_get(struct ast_channel *chan)
Gets the channel-attached features a channel has access to upon being bridged.
Definition: channel.c:11089
#define AST_CHANNEL_NAME
Definition: channel.h:171
#define ast_channel_unref(c)
Decrease channel reference count.
Definition: channel.h:2958
int ast_set_write_format(struct ast_channel *chan, struct ast_format *format)
Sets write format on channel chan.
Definition: channel.c:5880
#define AST_MAX_CONTEXT
Definition: channel.h:135
int ast_channel_unbridged(struct ast_channel *chan)
This function will check if the bridge needs to be re-evaluated due to external changes.
void ast_party_connected_line_init(struct ast_party_connected_line *init)
Initialize the given connected line structure.
Definition: channel.c:2016
int ast_channel_is_leaving_bridge(struct ast_channel *chan)
Determine if a channel is leaving a bridge, but not hung up.
Definition: channel.c:10736
int ast_channel_hold_state(const struct ast_channel *chan)
struct ast_party_caller * ast_channel_caller(struct ast_channel *chan)
struct ast_channel * ast_channel_get_by_name(const char *name)
Find a channel by name.
Definition: channel.c:1448
void ast_connected_line_copy_from_caller(struct ast_party_connected_line *dest, const struct ast_party_caller *src)
Copy the caller information to the connected line information.
Definition: channel.c:8376
struct ast_party_connected_line * ast_channel_connected_indicated(struct ast_channel *chan)
int ast_channel_setoption(struct ast_channel *channel, int option, void *data, int datalen, int block)
Sets an option on a channel.
Definition: channel.c:7505
void ast_channel_queue_connected_line_update(struct ast_channel *chan, const struct ast_party_connected_line *connected, const struct ast_set_party_connected_line *update)
Queue a connected line update frame on a channel.
Definition: channel.c:9189
char ast_channel_sending_dtmf_digit(const struct ast_channel *chan)
struct ast_stream_topology * ast_channel_get_stream_topology(const struct ast_channel *chan)
Retrieve the topology of streams on a channel.
int ast_write_stream(struct ast_channel *chan, int stream_num, struct ast_frame *frame)
Write a frame to a stream This function writes the given frame to the indicated stream on the channel...
Definition: channel.c:5184
void ast_channel_hangupcause_set(struct ast_channel *chan, int value)
int ast_answer(struct ast_channel *chan)
Answer a channel.
Definition: channel.c:2806
int ast_channel_is_multistream(struct ast_channel *chan)
Determine if a channel is multi-stream capable.
int ast_indicate(struct ast_channel *chan, int condition)
Indicates condition of channel.
Definition: channel.c:4312
int ast_is_deferrable_frame(const struct ast_frame *frame)
Should we keep this frame for later?
Definition: channel.c:1461
int ast_channel_is_t38_active(struct ast_channel *chan)
This function will check if T.38 is active on the channel.
const char * ast_channel_call_forward(const struct ast_channel *chan)
#define ast_channel_unlock(chan)
Definition: channel.h:2923
#define AST_MAX_EXTENSION
Definition: channel.h:134
ast_channel_state
ast_channel states
Definition: channelstate.h:35
@ AST_STATE_UP
Definition: channelstate.h:42
Local proxy channel special access.
struct ast_channel * ast_local_get_peer(struct ast_channel *ast)
Get the other local channel in the pair.
Definition: core_local.c:276
int ast_stream_and_wait(struct ast_channel *chan, const char *file, const char *digits)
stream file until digit If the file name is non-empty, try to play it.
Definition: file.c:1855
#define AST_DIGIT_NONE
Definition: file.h:47
const char * ast_format_get_name(const struct ast_format *format)
Get the name associated with a format.
Definition: format.c:334
enum ast_format_cmp_res ast_format_cmp(const struct ast_format *format1, const struct ast_format *format2)
Compare two formats.
Definition: format.c:201
@ AST_FORMAT_CMP_NOT_EQUAL
Definition: format.h:38
static int frame_size[4]
Definition: format_g726.c:52
void ast_channel_publish_cached_blob(struct ast_channel *chan, struct stasis_message_type *type, struct ast_json *blob)
Publish a channel blob message using the latest snapshot from the cache.
struct stasis_message_type * ast_channel_hold_type(void)
Message type for when a channel is placed on hold.
void ast_channel_publish_dial(struct ast_channel *caller, struct ast_channel *peer, const char *dialstring, const char *dialstatus)
Publish in the ast_channel_topic or ast_channel_topic_all topics a stasis message for the channels in...
struct stasis_message_type * ast_channel_unhold_type(void)
Message type for when a channel is removed from hold.
void ast_channel_publish_dial_forward(struct ast_channel *caller, struct ast_channel *peer, struct ast_channel *forwarded, const char *dialstring, const char *dialstatus, const char *forward)
Publish in the ast_channel_topic or ast_channel_topic_all topics a stasis message for the channels in...
const char * ast_msg_data_get_attribute(struct ast_msg_data *msg, enum ast_msg_data_attribute_type attribute_type)
Get attribute from ast_msg_data.
@ AST_MSG_DATA_ATTR_BODY
Definition: message.h:458
@ AST_MSG_DATA_ATTR_TO
Definition: message.h:455
@ AST_MSG_DATA_ATTR_FROM
Definition: message.h:456
unsigned int option_dtmfminduration
Definition: options.c:83
Max Heap data structure.
#define ast_heap_unlock(h)
Definition: heap.h:249
void * ast_heap_peek(struct ast_heap *h, unsigned int index)
Peek at an element on a heap.
Definition: heap.c:267
void * ast_heap_remove(struct ast_heap *h, void *elm)
Remove a specific element from a heap.
Definition: heap.c:251
#define ast_heap_push(h, elm)
Push an element on to a heap.
Definition: heap.h:125
#define ast_heap_wrlock(h)
Definition: heap.h:247
Application convenience functions, designed to give consistent look and feel to Asterisk apps.
int ast_app_exec_macro(struct ast_channel *autoservice_chan, struct ast_channel *macro_chan, const char *macro_args)
Run a macro on a channel, placing an optional second channel into autoservice.
Definition: main/app.c:270
int ast_app_exec_sub(struct ast_channel *autoservice_chan, struct ast_channel *sub_chan, const char *sub_args, int ignore_hangup)
Run a subroutine on a channel, placing an optional second channel into autoservice.
Definition: main/app.c:367
int ast_dtmf_stream(struct ast_channel *chan, struct ast_channel *peer, const char *digits, int between, unsigned int duration)
Send a string of DTMF digits to a channel.
Definition: main/app.c:1197
struct ast_features_general_config * ast_get_chan_features_general_config(struct ast_channel *chan)
Get the general configuration options for a channel.
struct ast_features_xfer_config * ast_get_chan_features_xfer_config(struct ast_channel *chan)
Get the transfer configuration options for a channel.
struct ast_featuremap_config * ast_get_chan_featuremap_config(struct ast_channel *chan)
Get the featuremap configuration options for a channel.
@ AST_T38_TERMINATED
@ AST_T38_REFUSED
@ AST_T38_REQUEST_TERMINATE
@ AST_T38_NEGOTIATED
@ AST_T38_REQUEST_NEGOTIATE
@ AST_FRAME_READ_ACTION_CONNECTED_LINE_MACRO
#define AST_OPTION_RELAXDTMF
#define AST_OPTION_TONE_VERIFY
#define ast_frdup(fr)
Copies a frame.
#define AST_OPTION_DIGIT_DETECT
#define ast_frfree(fr)
#define AST_OPTION_TDD
#define AST_OPTION_FLAG_REQUEST
#define AST_OPTION_FAX_DETECT
ast_frame_type
Frame types.
@ AST_FRAME_VIDEO
@ AST_FRAME_NULL
@ AST_FRAME_IMAGE
@ AST_FRAME_DTMF_END
@ AST_FRAME_DTMF_BEGIN
@ AST_FRAME_BRIDGE_ACTION_SYNC
@ AST_FRAME_VOICE
@ AST_FRAME_RTCP
@ AST_FRAME_TEXT_DATA
@ AST_FRAME_CONTROL
@ AST_FRAME_BRIDGE_ACTION
@ AST_FRAME_TEXT
ast_control_frame_type
Internal control frame subtype field values.
@ AST_CONTROL_SRCUPDATE
@ AST_CONTROL_PROGRESS
@ AST_CONTROL_BUSY
@ AST_CONTROL_UNHOLD
@ AST_CONTROL_STREAM_TOPOLOGY_REQUEST_CHANGE
@ AST_CONTROL_PROCEEDING
@ AST_CONTROL_REDIRECTING
@ AST_CONTROL_T38_PARAMETERS
@ AST_CONTROL_READ_ACTION
@ AST_CONTROL_CONGESTION
@ AST_CONTROL_ANSWER
@ AST_CONTROL_RINGING
@ AST_CONTROL_HANGUP
@ AST_CONTROL_HOLD
@ AST_CONTROL_OPTION
@ AST_CONTROL_STREAM_TOPOLOGY_CHANGED
@ AST_CONTROL_CONNECTED_LINE
@ AST_CONTROL_SRCCHANGE
@ AST_CONTROL_MASQUERADE_NOTIFY
#define AST_OPTION_AUDIO_MODE
struct ast_frame ast_null_frame
Definition: main/frame.c:79
#define AST_LOG_WARNING
#define DEBUG_ATLEAST(level)
#define ast_debug(level,...)
Log a DEBUG message.
ast_callid ast_read_threadstorage_callid(void)
extracts the callerid from the thread
Definition: logger.c:2048
#define LOG_DEBUG
#define LOG_ERROR
#define ast_verb(level,...)
#define LOG_WARNING
#define LOG_DTMF
void ast_json_unref(struct ast_json *value)
Decrease refcount on value. If refcount reaches zero, value is freed.
Definition: json.c:73
struct ast_json * ast_json_pack(char const *format,...)
Helper for creating complex JSON values.
Definition: json.c:591
#define AST_RWLIST_RDLOCK(head)
Read locks a list.
Definition: linkedlists.h:78
#define AST_LIST_LAST(head)
Returns the last entry contained in a list.
Definition: linkedlists.h:429
#define AST_RWLIST_WRLOCK(head)
Write locks a list.
Definition: linkedlists.h:52
#define AST_RWLIST_UNLOCK(head)
Attempts to unlock a read/write based list.
Definition: linkedlists.h:151
#define AST_LIST_TRAVERSE(head, var, field)
Loops over (traverses) the entries in a list.
Definition: linkedlists.h:491
#define AST_RWLIST_HEAD_STATIC(name, type)
Defines a structure to be used to hold a read/write list of specified type, statically initialized.
Definition: linkedlists.h:333
#define AST_LIST_EMPTY(head)
Checks whether the specified list contains any entries.
Definition: linkedlists.h:450
#define AST_LIST_INSERT_TAIL(head, elm, field)
Appends a list entry to the tail of a list.
Definition: linkedlists.h:731
#define AST_LIST_ENTRY(type)
Declare a forward link structure inside a list entry.
Definition: linkedlists.h:410
#define AST_LIST_TRAVERSE_SAFE_END
Closes a safe loop traversal block.
Definition: linkedlists.h:615
#define AST_RWLIST_TRAVERSE
Definition: linkedlists.h:494
#define AST_LIST_INSERT_HEAD(head, elm, field)
Inserts a list entry at the head of a list.
Definition: linkedlists.h:711
#define AST_LIST_REMOVE(head, elm, field)
Removes a specific entry from a list.
Definition: linkedlists.h:856
#define AST_LIST_TRAVERSE_SAFE_BEGIN(head, var, field)
Loops safely over (traverses) the entries in a list.
Definition: linkedlists.h:529
#define AST_LIST_REMOVE_CURRENT(field)
Removes the current entry from a list during a traversal.
Definition: linkedlists.h:557
#define AST_RWLIST_INSERT_TAIL
Definition: linkedlists.h:741
#define AST_LIST_REMOVE_HEAD(head, field)
Removes and returns the head entry from a list.
Definition: linkedlists.h:833
#define AST_LIST_FIRST(head)
Returns the first entry contained in a list.
Definition: linkedlists.h:421
#define ast_cond_destroy(cond)
Definition: lock.h:200
#define ast_cond_wait(cond, mutex)
Definition: lock.h:203
#define ast_cond_init(cond, attr)
Definition: lock.h:199
int ast_atomic_fetchadd_int(volatile int *p, int v)
Atomically add v to *p and return the previous value of *p.
Definition: lock.h:755
#define ast_cond_signal(cond)
Definition: lock.h:201
Out-of-call text message support.
Music on hold handling.
int ast_moh_start(struct ast_channel *chan, const char *mclass, const char *interpclass)
Turn on music on hold on a given channel.
Definition: channel.c:7849
Call Parking API.
int ast_parking_park_bridge_channel(struct ast_bridge_channel *parkee, const char *parkee_uuid, const char *parker_uuid, const char *app_data)
Perform a direct park on a channel in a bridge.
Definition: parking.c:126
int ast_parking_provider_registered(void)
Check whether a parking provider is registered.
Definition: parking.c:241
Core PBX routines and definitions.
void ast_str_substitute_variables(struct ast_str **buf, ssize_t maxlen, struct ast_channel *chan, const char *templ)
int pbx_exec(struct ast_channel *c, struct ast_app *app, const char *data)
Execute an application.
Definition: pbx_app.c:471
int pbx_builtin_setvar_helper(struct ast_channel *chan, const char *name, const char *value)
Add a variable to the channel variable stack, removing the most recently set value for the same name.
struct ast_app * pbx_findapp(const char *app)
Look up an application.
Definition: ael_main.c:165
int ast_async_goto(struct ast_channel *chan, const char *context, const char *exten, int priority)
Set the channel to next execute the specified dialplan location.
const char * app_name(struct ast_app *app)
Definition: pbx_app.c:463
#define NULL
Definition: resample.c:96
Asterisk semaphore API.
int ast_sem_init(struct ast_sem *sem, int pshared, unsigned int value)
Initialize a semaphore.
int ast_sem_destroy(struct ast_sem *sem)
Destroy a semaphore.
int ast_sem_timedwait(struct ast_sem *sem, const struct timespec *abs_timeout)
Decrements the semaphore, waiting until abs_timeout.
int ast_sem_post(struct ast_sem *sem)
Increments the semaphore, unblocking a waiter if necessary.
void ast_bridge_publish_leave(struct ast_bridge *bridge, struct ast_channel *chan)
Publish a bridge channel leave event.
void ast_bridge_publish_enter(struct ast_bridge *bridge, struct ast_channel *chan, struct ast_channel *swap)
Publish a bridge channel enter event.
Media Stream API.
void ast_stream_topology_map(const struct ast_stream_topology *topology, struct ast_vector_int *types, struct ast_vector_int *v0, struct ast_vector_int *v1)
Map a given topology's streams to the given types.
Definition: stream.c:985
char * ast_str_buffer(const struct ast_str *buf)
Returns the string buffer within the ast_str buf.
Definition: strings.h:739
#define S_OR(a, b)
returns the equivalent of logic or for strings: first one if not empty, otherwise second one.
Definition: strings.h:80
static force_inline int attribute_pure ast_strlen_zero(const char *s)
Definition: strings.h:65
#define ast_str_create(init_len)
Create a malloc'ed dynamic length string.
Definition: strings.h:640
void ast_copy_string(char *dst, const char *src, size_t size)
Size-limited null-terminating string copy.
Definition: strings.h:406
When we need to walk through a container, we use an ao2_iterator to keep track of the current positio...
Definition: astobj2.h:1821
ast_app: A registered application
Definition: pbx_app.c:45
Structure that contains information regarding a channel in a bridge.
struct ast_vector_int to_bridge
struct ast_bridge_channel::@226 stream_map
unsigned int suspended
struct ast_bridge_channel::@220 wr_queue
struct ast_channel * swap
struct ast_format * write_format
struct ast_bridge * bridge
Bridge this channel is participating in.
struct timeval interdigit_timeout
char collected[MAXIMUM_DTMF_FEATURE_STRING]
struct ast_bridge_channel::@223 dtmf_hook_state
struct ast_bridge_features * features
struct ast_bridge_channel::@221 deferred_queue
struct timeval dtmf_tv
unsigned int just_joined
struct ast_channel * chan
struct ast_format * read_format
enum bridge_channel_state state
struct ast_vector_int to_channel
unsigned int inhibit_colp
enum bridge_channel_thread_state activity
The bridge channel thread activity.
struct ast_bridge_channel::@222 owed
unsigned int in_bridge
Structure that contains features information.
struct ao2_container * other_hooks
struct ao2_container * dtmf_hooks
unsigned int interval_sequence
unsigned int dtmf_passthrough
struct ast_heap * interval_hooks
unsigned int text_messaging
struct ast_flags feature_flags
char code[MAXIMUM_DTMF_FEATURE_STRING]
struct ast_bridge_hook generic
struct ast_bridge_hook_dtmf_parms dtmf
struct ast_bridge_hook generic
struct ast_bridge_hook_timer_parms timer
Structure that is the essence of a feature hook.
enum ast_bridge_hook_type type
ast_bridge_hook_callback callback
ast_bridge_push_channel_fn push
Definition: bridge.h:265
const char * name
Definition: bridge.h:259
ast_bridge_pull_channel_fn pull
Definition: bridge.h:267
void(* unsuspend)(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
Unsuspend a channel on a bridging technology instance for a bridge.
int(* stream_topology_request_change)(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
Callback for when a request has been made to change a stream topology on a channel.
void(* stream_topology_changed)(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
Callback for when a stream topology changes on the channel.
int(* write)(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
Write a frame into the bridging technology instance for a bridge.
void(* suspend)(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
Suspend a channel on a bridging technology instance for a bridge.
void(* leave)(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
Remove a channel from a bridging technology instance for a bridge.
Structure that contains information about a bridge.
Definition: bridge.h:349
struct ast_vector_int media_types
Definition: bridge.h:404
const struct ast_bridge_methods * v_table
Definition: bridge.h:351
unsigned int reconfigured
Definition: bridge.h:388
unsigned int num_active
Definition: bridge.h:375
ast_callid callid
Definition: bridge.h:361
const ast_string_field uniqueid
Definition: bridge.h:401
struct ast_bridge_channels_list channels
Definition: bridge.h:363
unsigned int num_channels
Definition: bridge.h:373
unsigned int dissolved
Definition: bridge.h:390
int cause
Definition: bridge.h:386
struct ast_bridge_technology * technology
Definition: bridge.h:355
unsigned int num_lonely
Definition: bridge.h:377
struct ast_flags feature_flags
Definition: bridge.h:369
Main Channel structure associated with a channel.
struct ast_bridge_channel * bridge_channel
struct ast_bridge * bridge
enum ast_channel_state state
enum ast_frame_read_action action
enum ast_control_t38 request_response
Configuration for the builtin features.
General features configuration items.
Feature configuration relating to transfers.
Data structure associated with a single frame of data.
struct ast_frame_subclass subclass
union ast_frame::@254 data
enum ast_frame_type frametype
const char * src
Definition: heap.c:36
Abstract JSON element (object, array, string, int, ...).
Structure used to transport a message through the frame core.
Connected Line/Party information.
Definition: channel.h:456
struct ast_party_id priv
Private connected party ID.
Definition: channel.h:468
Definition: sem.h:81
Support for dynamic strings.
Definition: strings.h:604
Data specifying where a blind transfer is going to.
char exten[AST_MAX_EXTENSION]
char context[AST_MAX_CONTEXT]
ast_bridge_custom_callback_fn callback
char parkee_uuid[0]
ast_bridge_custom_play_fn custom_play
Synchronous bridge action object.
struct bridge_sync::@344 list
struct ast_sem sem
unsigned int id
Definition: search.h:40
Frame payload for synchronous bridge actions.
unsigned int id
unsigned char data[0]
List holding active synchronous action objects.
Test Framework API.
#define ast_test_suite_event_notify(s, f,...)
Definition: test.h:189
struct timeval ast_samp2tv(unsigned int _nsamp, unsigned int _rate)
Returns a timeval corresponding to the duration of n samples at rate r. Useful to convert samples to ...
Definition: time.h:245
struct timeval ast_tvadd(struct timeval a, struct timeval b)
Returns the sum of two timevals a + b.
Definition: extconf.c:2282
int64_t ast_tvdiff_ms(struct timeval end, struct timeval start)
Computes the difference (in milliseconds) between two struct timeval instances.
Definition: time.h:105
struct timeval ast_tvnow(void)
Returns current timeval. Meant to replace calls to gettimeofday().
Definition: time.h:157
Timing source management.
#define ast_test_flag(p, flag)
Definition: utils.h:63
#define RAII_VAR(vartype, varname, initval, dtor)
Declare a variable that will call a destructor function when it goes out of scope.
Definition: utils.h:936
#define ast_assert(a)
Definition: utils.h:734
#define ast_set2_flag(p, value, flag)
Definition: utils.h:94
#define ast_clear_flag(p, flag)
Definition: utils.h:77
#define ARRAY_LEN(a)
Definition: utils.h:661
#define AST_VECTOR_SIZE(vec)
Get the number of elements in a vector.
Definition: vector.h:609
#define AST_VECTOR_FREE(vec)
Deallocates this vector.
Definition: vector.h:174
#define AST_VECTOR_GET(vec, idx)
Get an element from a vector.
Definition: vector.h:680