2 * Asterisk -- An open source telephony toolkit.
4 * Copyright (C) 1999 - 2006, Digium, Inc.
6 * Mark Spencer <markster@digium.com>
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.
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.
21 * \brief Channel Management
23 * \author Mark Spencer <markster@digium.com>
28 ASTERISK_FILE_VERSION(__FILE__
, "$Revision$")
41 #include <sys/ioctl.h>
42 #include <zaptel/zaptel.h>
45 #include "asterisk/pbx.h"
46 #include "asterisk/frame.h"
47 #include "asterisk/sched.h"
48 #include "asterisk/options.h"
49 #include "asterisk/channel.h"
50 #include "asterisk/audiohook.h"
51 #include "asterisk/musiconhold.h"
52 #include "asterisk/logger.h"
53 #include "asterisk/say.h"
54 #include "asterisk/file.h"
55 #include "asterisk/cli.h"
56 #include "asterisk/translate.h"
57 #include "asterisk/manager.h"
58 #include "asterisk/chanvars.h"
59 #include "asterisk/linkedlists.h"
60 #include "asterisk/indications.h"
61 #include "asterisk/monitor.h"
62 #include "asterisk/causes.h"
63 #include "asterisk/callerid.h"
64 #include "asterisk/utils.h"
65 #include "asterisk/lock.h"
66 #include "asterisk/app.h"
67 #include "asterisk/transcap.h"
68 #include "asterisk/devicestate.h"
69 #include "asterisk/sha1.h"
70 #include "asterisk/threadstorage.h"
71 #include "asterisk/slinfactory.h"
73 /* uncomment if you have problems with 'monitoring' synchronized files */
75 #define MONITOR_CONSTANT_DELAY
76 #define MONITOR_DELAY 150 * 8 /* 150 ms of MONITORING DELAY */
79 /*! Prevent new channel allocation if shutting down. */
80 static int shutting_down
;
84 unsigned long global_fin
, global_fout
;
86 AST_THREADSTORAGE(state2str_threadbuf
, state2str_threadbuf_init
);
87 #define STATE2STR_BUFSIZE 32
89 /*! Default amount of time to use when emulating a digit as a begin and end
91 #define AST_DEFAULT_EMULATE_DTMF_DURATION 100
93 /*! Minimum allowed digit length - 80ms */
94 #define AST_MIN_DTMF_DURATION 80
96 /*! Minimum amount of time between the end of the last digit and the beginning
97 * of a new one - 45ms */
98 #define AST_MIN_DTMF_GAP 45
101 const struct ast_channel_tech
*tech
;
102 AST_LIST_ENTRY(chanlist
) list
;
105 /*! the list of registered channel types */
106 static AST_LIST_HEAD_NOLOCK_STATIC(backends
, chanlist
);
108 /*! the list of channels we have. Note that the lock for this list is used for
109 both the channels list and the backends list. */
110 static AST_LIST_HEAD_STATIC(channels
, ast_channel
);
112 /*! map AST_CAUSE's to readable string representations */
113 const struct ast_cause
{
118 { AST_CAUSE_UNALLOCATED
, "UNALLOCATED", "Unallocated (unassigned) number" },
119 { AST_CAUSE_NO_ROUTE_TRANSIT_NET
, "NO_ROUTE_TRANSIT_NET", "No route to specified transmit network" },
120 { AST_CAUSE_NO_ROUTE_DESTINATION
, "NO_ROUTE_DESTINATION", "No route to destination" },
121 { AST_CAUSE_CHANNEL_UNACCEPTABLE
, "CHANNEL_UNACCEPTABLE", "Channel unacceptable" },
122 { AST_CAUSE_CALL_AWARDED_DELIVERED
, "CALL_AWARDED_DELIVERED", "Call awarded and being delivered in an established channel" },
123 { AST_CAUSE_NORMAL_CLEARING
, "NORMAL_CLEARING", "Normal Clearing" },
124 { AST_CAUSE_USER_BUSY
, "USER_BUSY", "User busy" },
125 { AST_CAUSE_NO_USER_RESPONSE
, "NO_USER_RESPONSE", "No user responding" },
126 { AST_CAUSE_NO_ANSWER
, "NO_ANSWER", "User alerting, no answer" },
127 { AST_CAUSE_CALL_REJECTED
, "CALL_REJECTED", "Call Rejected" },
128 { AST_CAUSE_NUMBER_CHANGED
, "NUMBER_CHANGED", "Number changed" },
129 { AST_CAUSE_DESTINATION_OUT_OF_ORDER
, "DESTINATION_OUT_OF_ORDER", "Destination out of order" },
130 { AST_CAUSE_INVALID_NUMBER_FORMAT
, "INVALID_NUMBER_FORMAT", "Invalid number format" },
131 { AST_CAUSE_FACILITY_REJECTED
, "FACILITY_REJECTED", "Facility rejected" },
132 { AST_CAUSE_RESPONSE_TO_STATUS_ENQUIRY
, "RESPONSE_TO_STATUS_ENQUIRY", "Response to STATus ENQuiry" },
133 { AST_CAUSE_NORMAL_UNSPECIFIED
, "NORMAL_UNSPECIFIED", "Normal, unspecified" },
134 { AST_CAUSE_NORMAL_CIRCUIT_CONGESTION
, "NORMAL_CIRCUIT_CONGESTION", "Circuit/channel congestion" },
135 { AST_CAUSE_NETWORK_OUT_OF_ORDER
, "NETWORK_OUT_OF_ORDER", "Network out of order" },
136 { AST_CAUSE_NORMAL_TEMPORARY_FAILURE
, "NORMAL_TEMPORARY_FAILURE", "Temporary failure" },
137 { AST_CAUSE_SWITCH_CONGESTION
, "SWITCH_CONGESTION", "Switching equipment congestion" },
138 { AST_CAUSE_ACCESS_INFO_DISCARDED
, "ACCESS_INFO_DISCARDED", "Access information discarded" },
139 { AST_CAUSE_REQUESTED_CHAN_UNAVAIL
, "REQUESTED_CHAN_UNAVAIL", "Requested channel not available" },
140 { AST_CAUSE_PRE_EMPTED
, "PRE_EMPTED", "Pre-empted" },
141 { AST_CAUSE_FACILITY_NOT_SUBSCRIBED
, "FACILITY_NOT_SUBSCRIBED", "Facility not subscribed" },
142 { AST_CAUSE_OUTGOING_CALL_BARRED
, "OUTGOING_CALL_BARRED", "Outgoing call barred" },
143 { AST_CAUSE_INCOMING_CALL_BARRED
, "INCOMING_CALL_BARRED", "Incoming call barred" },
144 { AST_CAUSE_BEARERCAPABILITY_NOTAUTH
, "BEARERCAPABILITY_NOTAUTH", "Bearer capability not authorized" },
145 { AST_CAUSE_BEARERCAPABILITY_NOTAVAIL
, "BEARERCAPABILITY_NOTAVAIL", "Bearer capability not available" },
146 { AST_CAUSE_BEARERCAPABILITY_NOTIMPL
, "BEARERCAPABILITY_NOTIMPL", "Bearer capability not implemented" },
147 { AST_CAUSE_CHAN_NOT_IMPLEMENTED
, "CHAN_NOT_IMPLEMENTED", "Channel not implemented" },
148 { AST_CAUSE_FACILITY_NOT_IMPLEMENTED
, "FACILITY_NOT_IMPLEMENTED", "Facility not implemented" },
149 { AST_CAUSE_INVALID_CALL_REFERENCE
, "INVALID_CALL_REFERENCE", "Invalid call reference value" },
150 { AST_CAUSE_INCOMPATIBLE_DESTINATION
, "INCOMPATIBLE_DESTINATION", "Incompatible destination" },
151 { AST_CAUSE_INVALID_MSG_UNSPECIFIED
, "INVALID_MSG_UNSPECIFIED", "Invalid message unspecified" },
152 { AST_CAUSE_MANDATORY_IE_MISSING
, "MANDATORY_IE_MISSING", "Mandatory information element is missing" },
153 { AST_CAUSE_MESSAGE_TYPE_NONEXIST
, "MESSAGE_TYPE_NONEXIST", "Message type nonexist." },
154 { AST_CAUSE_WRONG_MESSAGE
, "WRONG_MESSAGE", "Wrong message" },
155 { AST_CAUSE_IE_NONEXIST
, "IE_NONEXIST", "Info. element nonexist or not implemented" },
156 { AST_CAUSE_INVALID_IE_CONTENTS
, "INVALID_IE_CONTENTS", "Invalid information element contents" },
157 { AST_CAUSE_WRONG_CALL_STATE
, "WRONG_CALL_STATE", "Message not compatible with call state" },
158 { AST_CAUSE_RECOVERY_ON_TIMER_EXPIRE
, "RECOVERY_ON_TIMER_EXPIRE", "Recover on timer expiry" },
159 { AST_CAUSE_MANDATORY_IE_LENGTH_ERROR
, "MANDATORY_IE_LENGTH_ERROR", "Mandatory IE length error" },
160 { AST_CAUSE_PROTOCOL_ERROR
, "PROTOCOL_ERROR", "Protocol error, unspecified" },
161 { AST_CAUSE_INTERWORKING
, "INTERWORKING", "Interworking, unspecified" },
164 struct ast_variable
*ast_channeltype_list(void)
167 struct ast_variable
*var
=NULL
, *prev
= NULL
;
168 AST_LIST_TRAVERSE(&backends
, cl
, list
) {
170 if ((prev
->next
= ast_variable_new(cl
->tech
->type
, cl
->tech
->description
)))
173 var
= ast_variable_new(cl
->tech
->type
, cl
->tech
->description
);
180 static int show_channeltypes(int fd
, int argc
, char *argv
[])
182 #define FORMAT "%-10.10s %-40.40s %-12.12s %-12.12s %-12.12s\n"
186 ast_cli(fd
, FORMAT
, "Type", "Description", "Devicestate", "Indications", "Transfer");
187 ast_cli(fd
, FORMAT
, "----------", "-----------", "-----------", "-----------", "--------");
188 if (AST_LIST_LOCK(&channels
)) {
189 ast_log(LOG_WARNING
, "Unable to lock channel list\n");
192 AST_LIST_TRAVERSE(&backends
, cl
, list
) {
193 ast_cli(fd
, FORMAT
, cl
->tech
->type
, cl
->tech
->description
,
194 (cl
->tech
->devicestate
) ? "yes" : "no",
195 (cl
->tech
->indicate
) ? "yes" : "no",
196 (cl
->tech
->transfer
) ? "yes" : "no");
199 AST_LIST_UNLOCK(&channels
);
200 ast_cli(fd
, "----------\n%d channel drivers registered.\n", count_chan
);
201 return RESULT_SUCCESS
;
207 static int show_channeltype_deprecated(int fd
, int argc
, char *argv
[])
209 struct chanlist
*cl
= NULL
;
212 return RESULT_SHOWUSAGE
;
214 if (AST_LIST_LOCK(&channels
)) {
215 ast_log(LOG_WARNING
, "Unable to lock channel list\n");
216 return RESULT_FAILURE
;
219 AST_LIST_TRAVERSE(&backends
, cl
, list
) {
220 if (!strncasecmp(cl
->tech
->type
, argv
[2], strlen(cl
->tech
->type
))) {
227 ast_cli(fd
, "\n%s is not a registered channel driver.\n", argv
[2]);
228 AST_LIST_UNLOCK(&channels
);
229 return RESULT_FAILURE
;
233 "-- Info about channel driver: %s --\n"
234 " Device State: %s\n"
237 " Capabilities: %d\n"
241 " Image Support: %s\n"
242 " Text Support: %s\n",
244 (cl
->tech
->devicestate
) ? "yes" : "no",
245 (cl
->tech
->indicate
) ? "yes" : "no",
246 (cl
->tech
->transfer
) ? "yes" : "no",
247 (cl
->tech
->capabilities
) ? cl
->tech
->capabilities
: -1,
248 (cl
->tech
->send_digit_begin
) ? "yes" : "no",
249 (cl
->tech
->send_digit_end
) ? "yes" : "no",
250 (cl
->tech
->send_html
) ? "yes" : "no",
251 (cl
->tech
->send_image
) ? "yes" : "no",
252 (cl
->tech
->send_text
) ? "yes" : "no"
256 AST_LIST_UNLOCK(&channels
);
257 return RESULT_SUCCESS
;
260 static int show_channeltype(int fd
, int argc
, char *argv
[])
262 struct chanlist
*cl
= NULL
;
265 return RESULT_SHOWUSAGE
;
267 if (AST_LIST_LOCK(&channels
)) {
268 ast_log(LOG_WARNING
, "Unable to lock channel list\n");
269 return RESULT_FAILURE
;
272 AST_LIST_TRAVERSE(&backends
, cl
, list
) {
273 if (!strncasecmp(cl
->tech
->type
, argv
[3], strlen(cl
->tech
->type
))) {
280 ast_cli(fd
, "\n%s is not a registered channel driver.\n", argv
[3]);
281 AST_LIST_UNLOCK(&channels
);
282 return RESULT_FAILURE
;
286 "-- Info about channel driver: %s --\n"
287 " Device State: %s\n"
290 " Capabilities: %d\n"
294 " Image Support: %s\n"
295 " Text Support: %s\n",
297 (cl
->tech
->devicestate
) ? "yes" : "no",
298 (cl
->tech
->indicate
) ? "yes" : "no",
299 (cl
->tech
->transfer
) ? "yes" : "no",
300 (cl
->tech
->capabilities
) ? cl
->tech
->capabilities
: -1,
301 (cl
->tech
->send_digit_begin
) ? "yes" : "no",
302 (cl
->tech
->send_digit_end
) ? "yes" : "no",
303 (cl
->tech
->send_html
) ? "yes" : "no",
304 (cl
->tech
->send_image
) ? "yes" : "no",
305 (cl
->tech
->send_text
) ? "yes" : "no"
309 AST_LIST_UNLOCK(&channels
);
310 return RESULT_SUCCESS
;
313 static char *complete_channeltypes_deprecated(const char *line
, const char *word
, int pos
, int state
)
323 wordlen
= strlen(word
);
325 AST_LIST_TRAVERSE(&backends
, cl
, list
) {
326 if (!strncasecmp(word
, cl
->tech
->type
, wordlen
) && ++which
> state
) {
327 ret
= strdup(cl
->tech
->type
);
335 static char *complete_channeltypes(const char *line
, const char *word
, int pos
, int state
)
345 wordlen
= strlen(word
);
347 AST_LIST_TRAVERSE(&backends
, cl
, list
) {
348 if (!strncasecmp(word
, cl
->tech
->type
, wordlen
) && ++which
> state
) {
349 ret
= strdup(cl
->tech
->type
);
357 static char show_channeltypes_usage
[] =
358 "Usage: core show channeltypes\n"
359 " Lists available channel types registered in your Asterisk server.\n";
361 static char show_channeltype_usage
[] =
362 "Usage: core show channeltype <name>\n"
363 " Show details about the specified channel type, <name>.\n";
365 static struct ast_cli_entry cli_show_channeltypes_deprecated
= {
366 { "show", "channeltypes", NULL
},
367 show_channeltypes
, NULL
,
370 static struct ast_cli_entry cli_show_channeltype_deprecated
= {
371 { "show", "channeltype", NULL
},
372 show_channeltype_deprecated
, NULL
,
373 NULL
, complete_channeltypes_deprecated
};
375 static struct ast_cli_entry cli_channel
[] = {
376 { { "core", "show", "channeltypes", NULL
},
377 show_channeltypes
, "List available channel types",
378 show_channeltypes_usage
, NULL
, &cli_show_channeltypes_deprecated
},
380 { { "core", "show", "channeltype", NULL
},
381 show_channeltype
, "Give more details on that channel type",
382 show_channeltype_usage
, complete_channeltypes
, &cli_show_channeltype_deprecated
},
385 /*! \brief Checks to see if a channel is needing hang up */
386 int ast_check_hangup(struct ast_channel
*chan
)
388 if (chan
->_softhangup
) /* yes if soft hangup flag set */
390 if (!chan
->tech_pvt
) /* yes if no technology private data */
392 if (!chan
->whentohangup
) /* no if no hangup scheduled */
394 if (chan
->whentohangup
> time(NULL
)) /* no if hangup time has not come yet. */
396 chan
->_softhangup
|= AST_SOFTHANGUP_TIMEOUT
; /* record event */
400 static int ast_check_hangup_locked(struct ast_channel
*chan
)
403 ast_channel_lock(chan
);
404 res
= ast_check_hangup(chan
);
405 ast_channel_unlock(chan
);
409 /*! \brief printf the string into a correctly sized mallocd buffer, and return the buffer */
410 char *ast_safe_string_alloc(const char *fmt
, ...)
417 len
= vsnprintf(buf
, 1, fmt
, args
);
420 if (!(b2
= ast_malloc(len
+ 1)))
424 vsnprintf(b2
, len
+ 1, fmt
, args
);
430 /*! \brief Initiate system shutdown */
431 void ast_begin_shutdown(int hangup
)
433 struct ast_channel
*c
;
436 AST_LIST_LOCK(&channels
);
437 AST_LIST_TRAVERSE(&channels
, c
, chan_list
)
438 ast_softhangup(c
, AST_SOFTHANGUP_SHUTDOWN
);
439 AST_LIST_UNLOCK(&channels
);
443 /*! \brief returns number of active/allocated channels */
444 int ast_active_channels(void)
446 struct ast_channel
*c
;
448 AST_LIST_LOCK(&channels
);
449 AST_LIST_TRAVERSE(&channels
, c
, chan_list
)
451 AST_LIST_UNLOCK(&channels
);
455 /*! \brief Cancel a shutdown in progress */
456 void ast_cancel_shutdown(void)
461 /*! \brief Returns non-zero if Asterisk is being shut down */
462 int ast_shutting_down(void)
464 return shutting_down
;
467 /*! \brief Set when to hangup channel */
468 void ast_channel_setwhentohangup(struct ast_channel
*chan
, time_t offset
)
470 chan
->whentohangup
= offset
? time(NULL
) + offset
: 0;
471 ast_queue_frame(chan
, &ast_null_frame
);
475 /*! \brief Compare a offset with when to hangup channel */
476 int ast_channel_cmpwhentohangup(struct ast_channel
*chan
, time_t offset
)
480 if (chan
->whentohangup
== 0) {
481 return (offset
== 0) ? 0 : -1;
483 if (offset
== 0) /* XXX why is this special ? */
486 whentohangup
= offset
+ time (NULL
);
487 if (chan
->whentohangup
< whentohangup
)
489 else if (chan
->whentohangup
== whentohangup
)
497 /*! \brief Register a new telephony channel in Asterisk */
498 int ast_channel_register(const struct ast_channel_tech
*tech
)
500 struct chanlist
*chan
;
502 AST_LIST_LOCK(&channels
);
504 AST_LIST_TRAVERSE(&backends
, chan
, list
) {
505 if (!strcasecmp(tech
->type
, chan
->tech
->type
)) {
506 ast_log(LOG_WARNING
, "Already have a handler for type '%s'\n", tech
->type
);
507 AST_LIST_UNLOCK(&channels
);
512 if (!(chan
= ast_calloc(1, sizeof(*chan
)))) {
513 AST_LIST_UNLOCK(&channels
);
517 AST_LIST_INSERT_HEAD(&backends
, chan
, list
);
520 ast_log(LOG_DEBUG
, "Registered handler for '%s' (%s)\n", chan
->tech
->type
, chan
->tech
->description
);
522 if (option_verbose
> 1)
523 ast_verbose(VERBOSE_PREFIX_2
"Registered channel type '%s' (%s)\n", chan
->tech
->type
,
524 chan
->tech
->description
);
526 AST_LIST_UNLOCK(&channels
);
530 void ast_channel_unregister(const struct ast_channel_tech
*tech
)
532 struct chanlist
*chan
;
535 ast_log(LOG_DEBUG
, "Unregistering channel type '%s'\n", tech
->type
);
537 AST_LIST_LOCK(&channels
);
539 AST_LIST_TRAVERSE_SAFE_BEGIN(&backends
, chan
, list
) {
540 if (chan
->tech
== tech
) {
541 AST_LIST_REMOVE_CURRENT(&backends
, list
);
543 if (option_verbose
> 1)
544 ast_verbose(VERBOSE_PREFIX_2
"Unregistered channel type '%s'\n", tech
->type
);
548 AST_LIST_TRAVERSE_SAFE_END
550 AST_LIST_UNLOCK(&channels
);
553 const struct ast_channel_tech
*ast_get_channel_tech(const char *name
)
555 struct chanlist
*chanls
;
556 const struct ast_channel_tech
*ret
= NULL
;
558 if (AST_LIST_LOCK(&channels
)) {
559 ast_log(LOG_WARNING
, "Unable to lock channel tech list\n");
563 AST_LIST_TRAVERSE(&backends
, chanls
, list
) {
564 if (!strcasecmp(name
, chanls
->tech
->type
)) {
570 AST_LIST_UNLOCK(&channels
);
575 /*! \brief Gives the string form of a given hangup cause */
576 const char *ast_cause2str(int cause
)
580 for (x
=0; x
< sizeof(causes
) / sizeof(causes
[0]); x
++) {
581 if (causes
[x
].cause
== cause
)
582 return causes
[x
].desc
;
588 /*! \brief Convert a symbolic hangup cause to number */
589 int ast_str2cause(const char *name
)
593 for (x
= 0; x
< sizeof(causes
) / sizeof(causes
[0]); x
++)
594 if (strncasecmp(causes
[x
].name
, name
, strlen(causes
[x
].name
)) == 0)
595 return causes
[x
].cause
;
600 /*! \brief Gives the string form of a given channel state */
601 char *ast_state2str(enum ast_channel_state state
)
608 case AST_STATE_RESERVED
:
610 case AST_STATE_OFFHOOK
:
612 case AST_STATE_DIALING
:
616 case AST_STATE_RINGING
:
622 case AST_STATE_DIALING_OFFHOOK
:
623 return "Dialing Offhook";
624 case AST_STATE_PRERING
:
627 if (!(buf
= ast_threadstorage_get(&state2str_threadbuf
, STATE2STR_BUFSIZE
)))
629 snprintf(buf
, STATE2STR_BUFSIZE
, "Unknown (%d)", state
);
634 /*! \brief Gives the string form of a given transfer capability */
635 char *ast_transfercapability2str(int transfercapability
)
637 switch(transfercapability
) {
638 case AST_TRANS_CAP_SPEECH
:
640 case AST_TRANS_CAP_DIGITAL
:
642 case AST_TRANS_CAP_RESTRICTED_DIGITAL
:
643 return "RESTRICTED_DIGITAL";
644 case AST_TRANS_CAP_3_1K_AUDIO
:
646 case AST_TRANS_CAP_DIGITAL_W_TONES
:
647 return "DIGITAL_W_TONES";
648 case AST_TRANS_CAP_VIDEO
:
655 /*! \brief Pick the best audio codec */
656 int ast_best_codec(int fmts
)
658 /* This just our opinion, expressed in code. We are asked to choose
659 the best codec to use, given no information */
663 /*! Okay, ulaw is used by all telephony equipment, so start with it */
665 /*! Unless of course, you're a silly European, so then prefer ALAW */
667 /*! G.722 is better then all below, but not as common as the above... so give ulaw and alaw priority */
669 /*! Okay, well, signed linear is easy to translate into other stuff */
671 /*! G.726 is standard ADPCM, in RFC3551 packing order */
673 /*! G.726 is standard ADPCM, in AAL2 packing order */
674 AST_FORMAT_G726_AAL2
,
675 /*! ADPCM has great sound quality and is still pretty easy to translate */
677 /*! Okay, we're down to vocoders now, so pick GSM because it's small and easier to
678 translate and sounds pretty good */
680 /*! iLBC is not too bad */
682 /*! Speex is free, but computationally more expensive than GSM */
684 /*! Ick, LPC10 sounds terrible, but at least we have code for it, if you're tacky enough
687 /*! G.729a is faster than 723 and slightly less expensive */
689 /*! Down to G.723.1 which is proprietary but at least designed for voice */
693 /* Strip out video */
694 fmts
&= AST_FORMAT_AUDIO_MASK
;
696 /* Find the first preferred codec in the format given */
697 for (x
=0; x
< (sizeof(prefs
) / sizeof(prefs
[0]) ); x
++)
700 ast_log(LOG_WARNING
, "Don't know any of 0x%x formats\n", fmts
);
704 static const struct ast_channel_tech null_tech
= {
706 .description
= "Null channel (should not see this)",
709 /*! \brief Create a new channel structure */
710 struct ast_channel
*ast_channel_alloc(int needqueue
, int state
, const char *cid_num
, const char *cid_name
, const char *acctcode
, const char *exten
, const char *context
, const int amaflag
, const char *name_fmt
, ...)
712 struct ast_channel
*tmp
;
715 struct varshead
*headp
;
718 /* If shutting down, don't allocate any new channels */
720 ast_log(LOG_WARNING
, "Channel allocation failed: Refusing due to active shutdown\n");
724 if (!(tmp
= ast_calloc(1, sizeof(*tmp
))))
727 if (!(tmp
->sched
= sched_context_create())) {
728 ast_log(LOG_WARNING
, "Channel allocation failed: Unable to create schedule context\n");
733 if ((ast_string_field_init(tmp
, 128))) {
734 sched_context_destroy(tmp
->sched
);
739 /* Don't bother initializing the last two FD here, because they
740 will *always* be set just a few lines down (AST_TIMING_FD,
742 for (x
= 0; x
< AST_MAX_FDS
- 2; x
++)
746 tmp
->timingfd
= open("/dev/zap/timer", O_RDWR
);
747 if (tmp
->timingfd
> -1) {
748 /* Check if timing interface supports new
751 if (!ioctl(tmp
->timingfd
, ZT_TIMERPONG
, &flags
))
759 if (pipe(tmp
->alertpipe
)) {
760 ast_log(LOG_WARNING
, "Channel allocation failed: Can't create alert pipe!\n");
762 if (tmp
->timingfd
> -1)
763 close(tmp
->timingfd
);
765 sched_context_destroy(tmp
->sched
);
766 ast_string_field_free_memory(tmp
);
770 flags
= fcntl(tmp
->alertpipe
[0], F_GETFL
);
771 fcntl(tmp
->alertpipe
[0], F_SETFL
, flags
| O_NONBLOCK
);
772 flags
= fcntl(tmp
->alertpipe
[1], F_GETFL
);
773 fcntl(tmp
->alertpipe
[1], F_SETFL
, flags
| O_NONBLOCK
);
775 } else /* Make sure we've got it done right if they don't */
776 tmp
->alertpipe
[0] = tmp
->alertpipe
[1] = -1;
778 /* Always watch the alertpipe */
779 tmp
->fds
[AST_ALERT_FD
] = tmp
->alertpipe
[0];
780 /* And timing pipe */
781 tmp
->fds
[AST_TIMING_FD
] = tmp
->timingfd
;
782 ast_string_field_set(tmp
, name
, "**Unknown**");
789 tmp
->fin
= global_fin
;
790 tmp
->fout
= global_fout
;
792 if (ast_strlen_zero(ast_config_AST_SYSTEM_NAME
)) {
793 ast_string_field_build(tmp
, uniqueid
, "%li.%d", (long) time(NULL
),
794 ast_atomic_fetchadd_int(&uniqueint
, 1));
796 ast_string_field_build(tmp
, uniqueid
, "%s-%li.%d", ast_config_AST_SYSTEM_NAME
,
797 (long) time(NULL
), ast_atomic_fetchadd_int(&uniqueint
, 1));
800 tmp
->cid
.cid_name
= ast_strdup(cid_name
);
801 tmp
->cid
.cid_num
= ast_strdup(cid_num
);
803 if (!ast_strlen_zero(name_fmt
)) {
804 /* Almost every channel is calling this function, and setting the name via the ast_string_field_build() call.
805 * And they all use slightly different formats for their name string.
806 * This means, to set the name here, we have to accept variable args, and call the string_field_build from here.
807 * This means, that the stringfields must have a routine that takes the va_lists directly, and
808 * uses them to build the string, instead of forming the va_lists internally from the vararg ... list.
809 * This new function was written so this can be accomplished.
811 va_start(ap1
, name_fmt
);
812 va_start(ap2
, name_fmt
);
813 ast_string_field_build_va(tmp
, name
, name_fmt
, ap1
, ap2
);
818 /* Reminder for the future: under what conditions do we NOT want to track cdrs on channels? */
820 /* These 4 variables need to be set up for the cdr_init() to work right */
822 tmp
->amaflags
= amaflag
;
824 tmp
->amaflags
= ast_default_amaflags
;
826 if (!ast_strlen_zero(acctcode
))
827 ast_string_field_set(tmp
, accountcode
, acctcode
);
829 ast_string_field_set(tmp
, accountcode
, ast_default_accountcode
);
831 if (!ast_strlen_zero(context
))
832 ast_copy_string(tmp
->context
, context
, sizeof(tmp
->context
));
834 strcpy(tmp
->context
, "default");
836 if (!ast_strlen_zero(exten
))
837 ast_copy_string(tmp
->exten
, exten
, sizeof(tmp
->exten
));
839 strcpy(tmp
->exten
, "s");
843 tmp
->cdr
= ast_cdr_alloc();
844 ast_cdr_init(tmp
->cdr
, tmp
);
845 ast_cdr_start(tmp
->cdr
);
847 headp
= &tmp
->varshead
;
848 AST_LIST_HEAD_INIT_NOLOCK(headp
);
850 ast_mutex_init(&tmp
->lock
);
852 AST_LIST_HEAD_INIT_NOLOCK(&tmp
->datastores
);
854 ast_string_field_set(tmp
, language
, defaultlanguage
);
856 tmp
->tech
= &null_tech
;
858 AST_LIST_LOCK(&channels
);
859 AST_LIST_INSERT_HEAD(&channels
, tmp
, chan_list
);
860 AST_LIST_UNLOCK(&channels
);
863 * and now, since the channel structure is built, and has its name, let's
864 * call the manager event generator with this Newchannel event. This is the
865 * proper and correct place to make this call, but you sure do have to pass
866 * a lot of data into this func to do it here!
868 if (!ast_strlen_zero(name_fmt
)) {
869 manager_event(EVENT_FLAG_CALL
, "Newchannel",
872 "CallerIDNum: %s\r\n"
873 "CallerIDName: %s\r\n"
875 tmp
->name
, ast_state2str(state
),
876 S_OR(cid_num
, "<unknown>"),
877 S_OR(cid_name
, "<unknown>"),
884 /*! \brief Queue an outgoing media frame */
885 int ast_queue_frame(struct ast_channel
*chan
, struct ast_frame
*fin
)
888 struct ast_frame
*cur
;
892 /* Build us a copy and free the original one */
893 if (!(f
= ast_frdup(fin
))) {
894 ast_log(LOG_WARNING
, "Unable to duplicate frame\n");
897 ast_channel_lock(chan
);
899 /* See if the last frame on the queue is a hangup, if so don't queue anything */
900 if ((cur
= AST_LIST_LAST(&chan
->readq
)) && (cur
->frametype
== AST_FRAME_CONTROL
) && (cur
->subclass
== AST_CONTROL_HANGUP
)) {
902 ast_channel_unlock(chan
);
906 /* Count how many frames exist on the queue */
907 AST_LIST_TRAVERSE(&chan
->readq
, cur
, frame_list
) {
911 /* Allow up to 96 voice frames outstanding, and up to 128 total frames */
912 if (((fin
->frametype
== AST_FRAME_VOICE
) && (qlen
> 96)) || (qlen
> 128)) {
913 if (fin
->frametype
!= AST_FRAME_VOICE
) {
914 ast_log(LOG_WARNING
, "Exceptionally long queue length queuing to %s\n", chan
->name
);
918 ast_log(LOG_DEBUG
, "Dropping voice to exceptionally long queue on %s\n", chan
->name
);
920 ast_channel_unlock(chan
);
924 AST_LIST_INSERT_TAIL(&chan
->readq
, f
, frame_list
);
925 if (chan
->alertpipe
[1] > -1) {
926 if (write(chan
->alertpipe
[1], &blah
, sizeof(blah
)) != sizeof(blah
))
927 ast_log(LOG_WARNING
, "Unable to write to alert pipe on %s, frametype/subclass %d/%d (qlen = %d): %s!\n",
928 chan
->name
, f
->frametype
, f
->subclass
, qlen
, strerror(errno
));
930 } else if (chan
->timingfd
> -1) {
931 ioctl(chan
->timingfd
, ZT_TIMERPING
, &blah
);
933 } else if (ast_test_flag(chan
, AST_FLAG_BLOCKING
)) {
934 pthread_kill(chan
->blocker
, SIGURG
);
936 ast_channel_unlock(chan
);
940 /*! \brief Queue a hangup frame for channel */
941 int ast_queue_hangup(struct ast_channel
*chan
)
943 struct ast_frame f
= { AST_FRAME_CONTROL
, AST_CONTROL_HANGUP
};
944 /* Yeah, let's not change a lock-critical value without locking */
945 if (!ast_channel_trylock(chan
)) {
946 chan
->_softhangup
|= AST_SOFTHANGUP_DEV
;
947 ast_channel_unlock(chan
);
949 return ast_queue_frame(chan
, &f
);
952 /*! \brief Queue a control frame */
953 int ast_queue_control(struct ast_channel
*chan
, enum ast_control_frame_type control
)
955 struct ast_frame f
= { AST_FRAME_CONTROL
, };
957 f
.subclass
= control
;
959 return ast_queue_frame(chan
, &f
);
962 /*! \brief Queue a control frame with payload */
963 int ast_queue_control_data(struct ast_channel
*chan
, enum ast_control_frame_type control
,
964 const void *data
, size_t datalen
)
966 struct ast_frame f
= { AST_FRAME_CONTROL
, };
968 f
.subclass
= control
;
969 f
.data
= (void *) data
;
972 return ast_queue_frame(chan
, &f
);
975 /*! \brief Set defer DTMF flag on channel */
976 int ast_channel_defer_dtmf(struct ast_channel
*chan
)
981 pre
= ast_test_flag(chan
, AST_FLAG_DEFER_DTMF
);
982 ast_set_flag(chan
, AST_FLAG_DEFER_DTMF
);
987 /*! \brief Unset defer DTMF flag on channel */
988 void ast_channel_undefer_dtmf(struct ast_channel
*chan
)
991 ast_clear_flag(chan
, AST_FLAG_DEFER_DTMF
);
995 * \brief Helper function to find channels.
997 * It supports these modes:
999 * prev != NULL : get channel next in list after prev
1000 * name != NULL : get channel with matching name
1001 * name != NULL && namelen != 0 : get channel whose name starts with prefix
1002 * exten != NULL : get channel whose exten or macroexten matches
1003 * context != NULL && exten != NULL : get channel whose context or macrocontext
1005 * It returns with the channel's lock held. If getting the individual lock fails,
1006 * unlock and retry quickly up to 10 times, then give up.
1008 * \note XXX Note that this code has cost O(N) because of the need to verify
1009 * that the object is still on the global list.
1011 * \note XXX also note that accessing fields (e.g. c->name in ast_log())
1012 * can only be done with the lock held or someone could delete the
1013 * object while we work on it. This causes some ugliness in the code.
1014 * Note that removing the first ast_log() may be harmful, as it would
1015 * shorten the retry period and possibly cause failures.
1016 * We should definitely go for a better scheme that is deadlock-free.
1018 static struct ast_channel
*channel_find_locked(const struct ast_channel
*prev
,
1019 const char *name
, const int namelen
,
1020 const char *context
, const char *exten
)
1022 const char *msg
= prev
? "deadlock" : "initial deadlock";
1024 struct ast_channel
*c
;
1025 const struct ast_channel
*_prev
= prev
;
1027 for (retries
= 0; retries
< 10; retries
++) {
1029 AST_LIST_LOCK(&channels
);
1030 AST_LIST_TRAVERSE(&channels
, c
, chan_list
) {
1032 if (prev
) { /* look for next item */
1033 if (c
!= prev
) /* not this one */
1035 /* found, prepare to return c->next */
1036 if ((c
= AST_LIST_NEXT(c
, chan_list
)) == NULL
) break;
1037 /* If prev was the last item on the channel list, then we just
1038 * want to return NULL, instead of trying to deref NULL in the
1042 /* We want prev to be NULL in case we end up doing more searching through
1043 * the channel list to find the channel (ie: name searching). If we didn't
1044 * set this to NULL the logic would just blow up
1045 * XXX Need a better explanation for this ...
1048 if (name
) { /* want match by name */
1049 if ((!namelen
&& strcasecmp(c
->name
, name
)) ||
1050 (namelen
&& strncasecmp(c
->name
, name
, namelen
)))
1051 continue; /* name match failed */
1053 if (context
&& strcasecmp(c
->context
, context
) &&
1054 strcasecmp(c
->macrocontext
, context
))
1055 continue; /* context match failed */
1056 if (strcasecmp(c
->exten
, exten
) &&
1057 strcasecmp(c
->macroexten
, exten
))
1058 continue; /* exten match failed */
1060 /* if we get here, c points to the desired record */
1063 /* exit if chan not found or mutex acquired successfully */
1064 /* this is slightly unsafe, as we _should_ hold the lock to access c->name */
1065 done
= c
== NULL
|| ast_channel_trylock(c
) == 0;
1068 ast_log(LOG_DEBUG
, "Avoiding %s for channel '%p'\n", msg
, c
);
1070 /* We are about to fail due to a deadlock, so report this
1071 * while we still have the list lock.
1074 ast_log(LOG_DEBUG
, "Failure, could not lock '%p' after %d retries!\n", c
, retries
);
1075 /* As we have deadlocked, we will skip this channel and
1076 * see if there is another match.
1077 * NOTE: No point doing this for a full-name match,
1078 * as there can be no more matches.
1080 if (!(name
&& !namelen
)) {
1086 AST_LIST_UNLOCK(&channels
);
1089 /* If we reach this point we basically tried to lock a channel and failed. Instead of
1090 * starting from the beginning of the list we can restore our saved pointer to the previous
1091 * channel and start from there.
1094 usleep(1); /* give other threads a chance before retrying */
1100 /*! \brief Browse channels in use */
1101 struct ast_channel
*ast_channel_walk_locked(const struct ast_channel
*prev
)
1103 return channel_find_locked(prev
, NULL
, 0, NULL
, NULL
);
1106 /*! \brief Get channel by name and lock it */
1107 struct ast_channel
*ast_get_channel_by_name_locked(const char *name
)
1109 return channel_find_locked(NULL
, name
, 0, NULL
, NULL
);
1112 /*! \brief Get channel by name prefix and lock it */
1113 struct ast_channel
*ast_get_channel_by_name_prefix_locked(const char *name
, const int namelen
)
1115 return channel_find_locked(NULL
, name
, namelen
, NULL
, NULL
);
1118 /*! \brief Get next channel by name prefix and lock it */
1119 struct ast_channel
*ast_walk_channel_by_name_prefix_locked(const struct ast_channel
*chan
, const char *name
,
1122 return channel_find_locked(chan
, name
, namelen
, NULL
, NULL
);
1125 /*! \brief Get channel by exten (and optionally context) and lock it */
1126 struct ast_channel
*ast_get_channel_by_exten_locked(const char *exten
, const char *context
)
1128 return channel_find_locked(NULL
, NULL
, 0, context
, exten
);
1131 /*! \brief Get next channel by exten (and optionally context) and lock it */
1132 struct ast_channel
*ast_walk_channel_by_exten_locked(const struct ast_channel
*chan
, const char *exten
,
1133 const char *context
)
1135 return channel_find_locked(chan
, NULL
, 0, context
, exten
);
1138 /*! \brief Wait, look for hangups and condition arg */
1139 int ast_safe_sleep_conditional(struct ast_channel
*chan
, int ms
, int (*cond
)(void*), void *data
)
1141 struct ast_frame
*f
;
1144 if (cond
&& ((*cond
)(data
) == 0))
1146 ms
= ast_waitfor(chan
, ms
);
1159 /*! \brief Wait, look for hangups */
1160 int ast_safe_sleep(struct ast_channel
*chan
, int ms
)
1162 return ast_safe_sleep_conditional(chan
, ms
, NULL
, NULL
);
1165 static void free_cid(struct ast_callerid
*cid
)
1168 free(cid
->cid_dnid
);
1172 free(cid
->cid_name
);
1176 free(cid
->cid_rdnis
);
1179 /*! \brief Free a channel structure */
1180 void ast_channel_free(struct ast_channel
*chan
)
1183 struct ast_var_t
*vardata
;
1184 struct ast_frame
*f
;
1185 struct varshead
*headp
;
1186 struct ast_datastore
*datastore
= NULL
;
1187 char name
[AST_CHANNEL_NAME
];
1189 headp
=&chan
->varshead
;
1191 AST_LIST_LOCK(&channels
);
1192 if (!AST_LIST_REMOVE(&channels
, chan
, chan_list
)) {
1193 AST_LIST_UNLOCK(&channels
);
1194 ast_log(LOG_ERROR
, "Unable to find channel in list to free. Assuming it has already been done.\n");
1196 /* Lock and unlock the channel just to be sure nobody
1197 has it locked still */
1198 ast_channel_lock(chan
);
1199 ast_channel_unlock(chan
);
1200 if (chan
->tech_pvt
) {
1201 ast_log(LOG_WARNING
, "Channel '%s' may not have been hung up properly\n", chan
->name
);
1202 free(chan
->tech_pvt
);
1206 sched_context_destroy(chan
->sched
);
1208 ast_copy_string(name
, chan
->name
, sizeof(name
));
1210 /* Stop monitoring */
1212 chan
->monitor
->stop( chan
, 0 );
1214 /* If there is native format music-on-hold state, free it */
1215 if (chan
->music_state
)
1216 ast_moh_cleanup(chan
);
1218 /* Free translators */
1219 if (chan
->readtrans
)
1220 ast_translator_free_path(chan
->readtrans
);
1221 if (chan
->writetrans
)
1222 ast_translator_free_path(chan
->writetrans
);
1224 ast_log(LOG_WARNING
, "PBX may not have been terminated properly on '%s'\n", chan
->name
);
1225 free_cid(&chan
->cid
);
1226 ast_mutex_destroy(&chan
->lock
);
1227 /* Close pipes if appropriate */
1228 if ((fd
= chan
->alertpipe
[0]) > -1)
1230 if ((fd
= chan
->alertpipe
[1]) > -1)
1232 if ((fd
= chan
->timingfd
) > -1)
1234 while ((f
= AST_LIST_REMOVE_HEAD(&chan
->readq
, frame_list
)))
1237 /* Get rid of each of the data stores on the channel */
1238 while ((datastore
= AST_LIST_REMOVE_HEAD(&chan
->datastores
, entry
)))
1239 /* Free the data store */
1240 ast_channel_datastore_free(datastore
);
1241 AST_LIST_HEAD_INIT_NOLOCK(&chan
->datastores
);
1243 /* loop over the variables list, freeing all data and deleting list items */
1244 /* no need to lock the list, as the channel is already locked */
1246 while ((vardata
= AST_LIST_REMOVE_HEAD(headp
, entries
)))
1247 ast_var_delete(vardata
);
1249 ast_app_group_discard(chan
);
1251 /* Destroy the jitterbuffer */
1252 ast_jb_destroy(chan
);
1254 ast_string_field_free_memory(chan
);
1256 AST_LIST_UNLOCK(&channels
);
1258 ast_device_state_changed_literal(name
);
1261 struct ast_datastore
*ast_channel_datastore_alloc(const struct ast_datastore_info
*info
, char *uid
)
1263 struct ast_datastore
*datastore
= NULL
;
1265 /* Make sure we at least have type so we can identify this */
1270 /* Allocate memory for datastore and clear it */
1271 datastore
= ast_calloc(1, sizeof(*datastore
));
1272 if (datastore
== NULL
) {
1276 datastore
->info
= info
;
1278 datastore
->uid
= ast_strdup(uid
);
1283 int ast_channel_datastore_free(struct ast_datastore
*datastore
)
1287 /* Using the destroy function (if present) destroy the data */
1288 if (datastore
->info
->destroy
!= NULL
&& datastore
->data
!= NULL
) {
1289 datastore
->info
->destroy(datastore
->data
);
1290 datastore
->data
= NULL
;
1293 /* Free allocated UID memory */
1294 if (datastore
->uid
!= NULL
) {
1295 free(datastore
->uid
);
1296 datastore
->uid
= NULL
;
1299 /* Finally free memory used by ourselves */
1305 int ast_channel_datastore_inherit(struct ast_channel
*from
, struct ast_channel
*to
)
1307 struct ast_datastore
*datastore
= NULL
, *datastore2
;
1309 AST_LIST_TRAVERSE(&from
->datastores
, datastore
, entry
) {
1310 if (datastore
->inheritance
> 0) {
1311 datastore2
= ast_channel_datastore_alloc(datastore
->info
, datastore
->uid
);
1313 datastore2
->data
= datastore
->info
->duplicate(datastore
->data
);
1314 datastore2
->inheritance
= datastore
->inheritance
== DATASTORE_INHERIT_FOREVER
? DATASTORE_INHERIT_FOREVER
: datastore
->inheritance
- 1;
1315 AST_LIST_INSERT_TAIL(&to
->datastores
, datastore2
, entry
);
1322 int ast_channel_datastore_add(struct ast_channel
*chan
, struct ast_datastore
*datastore
)
1326 AST_LIST_INSERT_HEAD(&chan
->datastores
, datastore
, entry
);
1331 int ast_channel_datastore_remove(struct ast_channel
*chan
, struct ast_datastore
*datastore
)
1333 struct ast_datastore
*datastore2
= NULL
;
1336 /* Find our position and remove ourselves */
1337 AST_LIST_TRAVERSE_SAFE_BEGIN(&chan
->datastores
, datastore2
, entry
) {
1338 if (datastore2
== datastore
) {
1339 AST_LIST_REMOVE_CURRENT(&chan
->datastores
, entry
);
1344 AST_LIST_TRAVERSE_SAFE_END
1349 struct ast_datastore
*ast_channel_datastore_find(struct ast_channel
*chan
, const struct ast_datastore_info
*info
, char *uid
)
1351 struct ast_datastore
*datastore
= NULL
;
1356 AST_LIST_TRAVERSE_SAFE_BEGIN(&chan
->datastores
, datastore
, entry
) {
1357 if (datastore
->info
== info
) {
1358 if (uid
!= NULL
&& datastore
->uid
!= NULL
) {
1359 if (!strcasecmp(uid
, datastore
->uid
)) {
1360 /* Matched by type AND uid */
1364 /* Matched by type at least */
1369 AST_LIST_TRAVERSE_SAFE_END
1374 /*! \brief Softly hangup a channel, don't lock */
1375 int ast_softhangup_nolock(struct ast_channel
*chan
, int cause
)
1378 ast_log(LOG_DEBUG
, "Soft-Hanging up channel '%s'\n", chan
->name
);
1379 /* Inform channel driver that we need to be hung up, if it cares */
1380 chan
->_softhangup
|= cause
;
1381 ast_queue_frame(chan
, &ast_null_frame
);
1382 /* Interrupt any poll call or such */
1383 if (ast_test_flag(chan
, AST_FLAG_BLOCKING
))
1384 pthread_kill(chan
->blocker
, SIGURG
);
1388 /*! \brief Softly hangup a channel, lock */
1389 int ast_softhangup(struct ast_channel
*chan
, int cause
)
1392 ast_channel_lock(chan
);
1393 res
= ast_softhangup_nolock(chan
, cause
);
1394 ast_channel_unlock(chan
);
1398 static void free_translation(struct ast_channel
*clone
)
1400 if (clone
->writetrans
)
1401 ast_translator_free_path(clone
->writetrans
);
1402 if (clone
->readtrans
)
1403 ast_translator_free_path(clone
->readtrans
);
1404 clone
->writetrans
= NULL
;
1405 clone
->readtrans
= NULL
;
1406 clone
->rawwriteformat
= clone
->nativeformats
;
1407 clone
->rawreadformat
= clone
->nativeformats
;
1410 /*! \brief Hangup a channel */
1411 int ast_hangup(struct ast_channel
*chan
)
1414 struct ast_cdr
*cdr
= NULL
;
1416 /* Don't actually hang up a channel that will masquerade as someone else, or
1417 if someone is going to masquerade as us */
1418 ast_channel_lock(chan
);
1420 if (chan
->audiohooks
) {
1421 ast_audiohook_detach_list(chan
->audiohooks
);
1422 chan
->audiohooks
= NULL
;
1425 ast_autoservice_stop(chan
);
1428 if (ast_do_masquerade(chan
))
1429 ast_log(LOG_WARNING
, "Failed to perform masquerade\n");
1433 ast_log(LOG_WARNING
, "%s getting hung up, but someone is trying to masq into us?!?\n", chan
->name
);
1434 ast_channel_unlock(chan
);
1437 /* If this channel is one which will be masqueraded into something,
1438 mark it as a zombie already, so we know to free it later */
1440 ast_set_flag(chan
, AST_FLAG_ZOMBIE
);
1441 ast_channel_unlock(chan
);
1444 free_translation(chan
);
1445 /* Close audio stream */
1447 ast_closestream(chan
->stream
);
1448 chan
->stream
= NULL
;
1450 /* Close video stream */
1451 if (chan
->vstream
) {
1452 ast_closestream(chan
->vstream
);
1453 chan
->vstream
= NULL
;
1456 sched_context_destroy(chan
->sched
);
1460 if (chan
->generatordata
) /* Clear any tone stuff remaining */
1461 chan
->generator
->release(chan
, chan
->generatordata
);
1462 chan
->generatordata
= NULL
;
1463 chan
->generator
= NULL
;
1464 if (chan
->cdr
) { /* End the CDR if it hasn't already */
1465 ast_cdr_end(chan
->cdr
);
1469 if (ast_test_flag(chan
, AST_FLAG_BLOCKING
)) {
1470 ast_log(LOG_WARNING
, "Hard hangup called by thread %ld on %s, while fd "
1471 "is blocked by thread %ld in procedure %s! Expect a failure\n",
1472 (long)pthread_self(), chan
->name
, (long)chan
->blocker
, chan
->blockproc
);
1475 if (!ast_test_flag(chan
, AST_FLAG_ZOMBIE
)) {
1477 ast_log(LOG_DEBUG
, "Hanging up channel '%s'\n", chan
->name
);
1478 if (chan
->tech
->hangup
)
1479 res
= chan
->tech
->hangup(chan
);
1482 ast_log(LOG_DEBUG
, "Hanging up zombie '%s'\n", chan
->name
);
1485 ast_channel_unlock(chan
);
1486 manager_event(EVENT_FLAG_CALL
, "Hangup",
1490 "Cause-txt: %s\r\n",
1494 ast_cause2str(chan
->hangupcause
)
1496 ast_channel_free(chan
);
1499 ast_cdr_detach(cdr
);
1504 int ast_answer(struct ast_channel
*chan
)
1507 ast_channel_lock(chan
);
1508 /* You can't answer an outbound call */
1509 if (ast_test_flag(chan
, AST_FLAG_OUTGOING
)) {
1510 ast_channel_unlock(chan
);
1513 /* Stop if we're a zombie or need a soft hangup */
1514 if (ast_test_flag(chan
, AST_FLAG_ZOMBIE
) || ast_check_hangup(chan
)) {
1515 ast_channel_unlock(chan
);
1518 switch(chan
->_state
) {
1519 case AST_STATE_RINGING
:
1520 case AST_STATE_RING
:
1521 if (chan
->tech
->answer
)
1522 res
= chan
->tech
->answer(chan
);
1523 ast_setstate(chan
, AST_STATE_UP
);
1524 ast_cdr_answer(chan
->cdr
);
1527 ast_cdr_answer(chan
->cdr
);
1532 chan
->visible_indication
= 0;
1533 ast_channel_unlock(chan
);
1537 void ast_deactivate_generator(struct ast_channel
*chan
)
1539 ast_channel_lock(chan
);
1540 if (chan
->generatordata
) {
1541 if (chan
->generator
&& chan
->generator
->release
)
1542 chan
->generator
->release(chan
, chan
->generatordata
);
1543 chan
->generatordata
= NULL
;
1544 chan
->generator
= NULL
;
1545 chan
->fds
[AST_GENERATOR_FD
] = -1;
1546 ast_clear_flag(chan
, AST_FLAG_WRITE_INT
);
1547 ast_settimeout(chan
, 0, NULL
, NULL
);
1549 ast_channel_unlock(chan
);
1552 static int generator_force(const void *data
)
1554 /* Called if generator doesn't have data */
1557 int (*generate
)(struct ast_channel
*chan
, void *tmp
, int datalen
, int samples
) = NULL
;
1558 struct ast_channel
*chan
= (struct ast_channel
*)data
;
1560 ast_channel_lock(chan
);
1561 tmp
= chan
->generatordata
;
1562 chan
->generatordata
= NULL
;
1563 if (chan
->generator
)
1564 generate
= chan
->generator
->generate
;
1565 ast_channel_unlock(chan
);
1567 if (!tmp
|| !generate
)
1570 res
= generate(chan
, tmp
, 0, 160);
1572 chan
->generatordata
= tmp
;
1576 ast_log(LOG_DEBUG
, "Auto-deactivating generator\n");
1577 ast_deactivate_generator(chan
);
1583 int ast_activate_generator(struct ast_channel
*chan
, struct ast_generator
*gen
, void *params
)
1587 ast_channel_lock(chan
);
1589 if (chan
->generatordata
) {
1590 if (chan
->generator
&& chan
->generator
->release
)
1591 chan
->generator
->release(chan
, chan
->generatordata
);
1592 chan
->generatordata
= NULL
;
1596 if (gen
->alloc
&& !(chan
->generatordata
= gen
->alloc(chan
, params
))) {
1601 ast_settimeout(chan
, 160, generator_force
, chan
);
1602 chan
->generator
= gen
;
1605 ast_channel_unlock(chan
);
1610 /*! \brief Wait for x amount of time on a file descriptor to have input. */
1611 int ast_waitfor_n_fd(int *fds
, int n
, int *ms
, int *exception
)
1614 ast_waitfor_nandfds(NULL
, 0, fds
, n
, exception
, &winner
, ms
);
1618 /*! \brief Wait for x amount of time on a file descriptor to have input. */
1619 struct ast_channel
*ast_waitfor_nandfds(struct ast_channel
**c
, int n
, int *fds
, int nfds
,
1620 int *exception
, int *outfd
, int *ms
)
1622 struct timeval start
= { 0 , 0 };
1623 struct pollfd
*pfds
= NULL
;
1629 long whentohangup
= 0, diff
;
1630 struct ast_channel
*winner
= NULL
;
1636 if ((sz
= n
* AST_MAX_FDS
+ nfds
)) {
1637 pfds
= alloca(sizeof(*pfds
) * sz
);
1638 fdmap
= alloca(sizeof(*fdmap
) * sz
);
1646 /* Perform any pending masquerades */
1647 for (x
=0; x
< n
; x
++) {
1648 ast_channel_lock(c
[x
]);
1650 if (ast_do_masquerade(c
[x
])) {
1651 ast_log(LOG_WARNING
, "Masquerade failed\n");
1653 ast_channel_unlock(c
[x
]);
1657 if (c
[x
]->whentohangup
) {
1660 diff
= c
[x
]->whentohangup
- now
;
1662 /* Should already be hungup */
1663 c
[x
]->_softhangup
|= AST_SOFTHANGUP_TIMEOUT
;
1664 ast_channel_unlock(c
[x
]);
1667 if (!whentohangup
|| (diff
< whentohangup
))
1668 whentohangup
= diff
;
1670 ast_channel_unlock(c
[x
]);
1672 /* Wait full interval */
1675 rms
= whentohangup
* 1000; /* timeout in milliseconds */
1676 if (*ms
>= 0 && *ms
< rms
) /* original *ms still smaller */
1680 * Build the pollfd array, putting the channels' fds first,
1681 * followed by individual fds. Order is important because
1682 * individual fd's must have priority over channel fds.
1685 for (x
=0; x
<n
; x
++) {
1686 for (y
=0; y
<AST_MAX_FDS
; y
++) {
1687 fdmap
[max
].fdno
= y
; /* fd y is linked to this pfds */
1688 fdmap
[max
].chan
= x
; /* channel x is linked to this pfds */
1689 max
+= ast_add_fd(&pfds
[max
], c
[x
]->fds
[y
]);
1691 CHECK_BLOCKING(c
[x
]);
1693 /* Add the individual fds */
1694 for (x
=0; x
<nfds
; x
++) {
1695 fdmap
[max
].chan
= -1;
1696 max
+= ast_add_fd(&pfds
[max
], fds
[x
]);
1700 start
= ast_tvnow();
1702 if (sizeof(int) == 4) { /* XXX fix timeout > 600000 on linux x86-32 */
1707 res
= poll(pfds
, max
, kbrms
);
1710 } while (!res
&& (rms
> 0));
1712 res
= poll(pfds
, max
, rms
);
1715 ast_clear_flag(c
[x
], AST_FLAG_BLOCKING
);
1716 if (res
< 0) { /* Simulate a timeout if we were interrupted */
1721 if (whentohangup
) { /* if we have a timeout, check who expired */
1723 for (x
=0; x
<n
; x
++) {
1724 if (c
[x
]->whentohangup
&& now
>= c
[x
]->whentohangup
) {
1725 c
[x
]->_softhangup
|= AST_SOFTHANGUP_TIMEOUT
;
1731 if (res
== 0) { /* no fd ready, reset timeout and done */
1732 *ms
= 0; /* XXX use 0 since we may not have an exact timeout. */
1736 * Then check if any channel or fd has a pending event.
1737 * Remember to check channels first and fds last, as they
1738 * must have priority on setting 'winner'
1740 for (x
= 0; x
< max
; x
++) {
1741 res
= pfds
[x
].revents
;
1744 if (fdmap
[x
].chan
>= 0) { /* this is a channel */
1745 winner
= c
[fdmap
[x
].chan
]; /* override previous winners */
1747 ast_set_flag(winner
, AST_FLAG_EXCEPTION
);
1749 ast_clear_flag(winner
, AST_FLAG_EXCEPTION
);
1750 winner
->fdno
= fdmap
[x
].fdno
;
1751 } else { /* this is an fd */
1753 *outfd
= pfds
[x
].fd
;
1755 *exception
= (res
& POLLPRI
) ? -1 : 0;
1760 *ms
-= ast_tvdiff_ms(ast_tvnow(), start
);
1767 struct ast_channel
*ast_waitfor_n(struct ast_channel
**c
, int n
, int *ms
)
1769 return ast_waitfor_nandfds(c
, n
, NULL
, 0, NULL
, NULL
, ms
);
1772 int ast_waitfor(struct ast_channel
*c
, int ms
)
1774 int oldms
= ms
; /* -1 if no timeout */
1776 ast_waitfor_nandfds(&c
, 1, NULL
, 0, NULL
, NULL
, &ms
);
1777 if ((ms
< 0) && (oldms
< 0))
1782 /* XXX never to be called with ms = -1 */
1783 int ast_waitfordigit(struct ast_channel
*c
, int ms
)
1785 return ast_waitfordigit_full(c
, ms
, -1, -1);
1788 int ast_settimeout(struct ast_channel
*c
, int samples
, int (*func
)(const void *data
), void *data
)
1792 if (c
->timingfd
> -1) {
1798 ast_log(LOG_DEBUG
, "Scheduling timer at %d sample intervals\n", samples
);
1799 res
= ioctl(c
->timingfd
, ZT_TIMERCONFIG
, &samples
);
1800 c
->timingfunc
= func
;
1801 c
->timingdata
= data
;
1807 int ast_waitfordigit_full(struct ast_channel
*c
, int ms
, int audiofd
, int cmdfd
)
1809 /* Stop if we're a zombie or need a soft hangup */
1810 if (ast_test_flag(c
, AST_FLAG_ZOMBIE
) || ast_check_hangup(c
))
1813 /* Only look for the end of DTMF, don't bother with the beginning and don't emulate things */
1814 ast_set_flag(c
, AST_FLAG_END_DTMF_ONLY
);
1816 /* Wait for a digit, no more than ms milliseconds total. */
1818 struct ast_channel
*rchan
;
1822 rchan
= ast_waitfor_nandfds(&c
, 1, &cmdfd
, (cmdfd
> -1) ? 1 : 0, NULL
, &outfd
, &ms
);
1823 if (!rchan
&& outfd
< 0 && ms
) {
1824 if (errno
== 0 || errno
== EINTR
)
1826 ast_log(LOG_WARNING
, "Wait failed (%s)\n", strerror(errno
));
1827 ast_clear_flag(c
, AST_FLAG_END_DTMF_ONLY
);
1829 } else if (outfd
> -1) {
1830 /* The FD we were watching has something waiting */
1831 ast_clear_flag(c
, AST_FLAG_END_DTMF_ONLY
);
1835 struct ast_frame
*f
= ast_read(c
);
1839 switch(f
->frametype
) {
1840 case AST_FRAME_DTMF_BEGIN
:
1842 case AST_FRAME_DTMF_END
:
1845 ast_clear_flag(c
, AST_FLAG_END_DTMF_ONLY
);
1847 case AST_FRAME_CONTROL
:
1848 switch(f
->subclass
) {
1849 case AST_CONTROL_HANGUP
:
1851 ast_clear_flag(c
, AST_FLAG_END_DTMF_ONLY
);
1853 case AST_CONTROL_RINGING
:
1854 case AST_CONTROL_ANSWER
:
1855 case AST_CONTROL_SRCUPDATE
:
1859 ast_log(LOG_WARNING
, "Unexpected control subclass '%d'\n", f
->subclass
);
1863 case AST_FRAME_VOICE
:
1864 /* Write audio if appropriate */
1866 write(audiofd
, f
->data
, f
->datalen
);
1875 ast_clear_flag(c
, AST_FLAG_END_DTMF_ONLY
);
1877 return 0; /* Time is up */
1880 static void ast_read_generator_actions(struct ast_channel
*chan
, struct ast_frame
*f
)
1882 if (chan
->generatordata
&& !ast_internal_timing_enabled(chan
)) {
1883 void *tmp
= chan
->generatordata
;
1886 if (chan
->timingfunc
) {
1887 if (option_debug
> 1)
1888 ast_log(LOG_DEBUG
, "Generator got voice, switching to phase locked mode\n");
1889 ast_settimeout(chan
, 0, NULL
, NULL
);
1892 chan
->generatordata
= NULL
; /* reset, to let writes go through */
1893 res
= chan
->generator
->generate(chan
, tmp
, f
->datalen
, f
->samples
);
1894 chan
->generatordata
= tmp
;
1896 if (option_debug
> 1)
1897 ast_log(LOG_DEBUG
, "Auto-deactivating generator\n");
1898 ast_deactivate_generator(chan
);
1901 } else if (f
->frametype
== AST_FRAME_CNG
) {
1902 if (chan
->generator
&& !chan
->timingfunc
&& (chan
->timingfd
> -1)) {
1903 if (option_debug
> 1)
1904 ast_log(LOG_DEBUG
, "Generator got CNG, switching to timed mode\n");
1905 ast_settimeout(chan
, 160, generator_force
, chan
);
1910 static struct ast_frame
*__ast_read(struct ast_channel
*chan
, int dropaudio
)
1912 struct ast_frame
*f
= NULL
; /* the return value */
1917 /* this function is very long so make sure there is only one return
1918 * point at the end (there are only two exceptions to this).
1920 while(ast_channel_trylock(chan
)) {
1922 /*cannot goto done since the channel is not locked*/
1923 return &ast_null_frame
;
1928 if (ast_do_masquerade(chan
))
1929 ast_log(LOG_WARNING
, "Failed to perform masquerade\n");
1931 f
= &ast_null_frame
;
1935 /* Stop if we're a zombie or need a soft hangup */
1936 if (ast_test_flag(chan
, AST_FLAG_ZOMBIE
) || ast_check_hangup(chan
)) {
1937 if (chan
->generator
)
1938 ast_deactivate_generator(chan
);
1941 prestate
= chan
->_state
;
1943 if (!ast_test_flag(chan
, AST_FLAG_DEFER_DTMF
| AST_FLAG_EMULATE_DTMF
| AST_FLAG_IN_DTMF
) &&
1944 !ast_strlen_zero(chan
->dtmfq
) &&
1945 (ast_tvzero(chan
->dtmf_tv
) || ast_tvdiff_ms(ast_tvnow(), chan
->dtmf_tv
) > AST_MIN_DTMF_GAP
) ) {
1946 /* We have DTMF that has been deferred. Return it now */
1947 chan
->dtmff
.subclass
= chan
->dtmfq
[0];
1948 /* Drop first digit from the buffer */
1949 memmove(chan
->dtmfq
, chan
->dtmfq
+ 1, sizeof(chan
->dtmfq
) - 1);
1951 if (ast_test_flag(chan
, AST_FLAG_END_DTMF_ONLY
)) {
1952 ast_log(LOG_DTMF
, "DTMF end emulation of '%c' queued on %s\n", f
->subclass
, chan
->name
);
1953 chan
->dtmff
.frametype
= AST_FRAME_DTMF_END
;
1955 ast_log(LOG_DTMF
, "DTMF begin emulation of '%c' with duration %d queued on %s\n", f
->subclass
, AST_DEFAULT_EMULATE_DTMF_DURATION
, chan
->name
);
1956 chan
->dtmff
.frametype
= AST_FRAME_DTMF_BEGIN
;
1957 ast_set_flag(chan
, AST_FLAG_EMULATE_DTMF
);
1958 chan
->emulate_dtmf_digit
= f
->subclass
;
1959 chan
->emulate_dtmf_duration
= AST_DEFAULT_EMULATE_DTMF_DURATION
;
1961 chan
->dtmf_tv
= ast_tvnow();
1965 /* Read and ignore anything on the alertpipe, but read only
1966 one sizeof(blah) per frame that we send from it */
1967 if (chan
->alertpipe
[0] > -1)
1968 read(chan
->alertpipe
[0], &blah
, sizeof(blah
));
1971 if (chan
->timingfd
> -1 && chan
->fdno
== AST_TIMING_FD
&& ast_test_flag(chan
, AST_FLAG_EXCEPTION
)) {
1974 ast_clear_flag(chan
, AST_FLAG_EXCEPTION
);
1976 /* IF we can't get event, assume it's an expired as-per the old interface */
1977 res
= ioctl(chan
->timingfd
, ZT_GETEVENT
, &blah
);
1979 blah
= ZT_EVENT_TIMER_EXPIRED
;
1981 if (blah
== ZT_EVENT_TIMER_PING
) {
1982 if (AST_LIST_EMPTY(&chan
->readq
) || !AST_LIST_NEXT(AST_LIST_FIRST(&chan
->readq
), frame_list
)) {
1983 /* Acknowledge PONG unless we need it again */
1984 if (ioctl(chan
->timingfd
, ZT_TIMERPONG
, &blah
)) {
1985 ast_log(LOG_WARNING
, "Failed to pong timer on '%s': %s\n", chan
->name
, strerror(errno
));
1988 } else if (blah
== ZT_EVENT_TIMER_EXPIRED
) {
1989 ioctl(chan
->timingfd
, ZT_TIMERACK
, &blah
);
1990 if (chan
->timingfunc
) {
1991 /* save a copy of func/data before unlocking the channel */
1992 int (*func
)(const void *) = chan
->timingfunc
;
1993 void *data
= chan
->timingdata
;
1994 ast_channel_unlock(chan
);
1998 ioctl(chan
->timingfd
, ZT_TIMERCONFIG
, &blah
);
1999 chan
->timingdata
= NULL
;
2000 ast_channel_unlock(chan
);
2002 /* cannot 'goto done' because the channel is already unlocked */
2003 return &ast_null_frame
;
2005 ast_log(LOG_NOTICE
, "No/unknown event '%d' on timer for '%s'?\n", blah
, chan
->name
);
2008 if (chan
->fds
[AST_GENERATOR_FD
] > -1 && chan
->fdno
== AST_GENERATOR_FD
) {
2009 /* if the AST_GENERATOR_FD is set, call the generator with args
2010 * set to -1 so it can do whatever it needs to.
2012 void *tmp
= chan
->generatordata
;
2013 chan
->generatordata
= NULL
; /* reset to let ast_write get through */
2014 chan
->generator
->generate(chan
, tmp
, -1, -1);
2015 chan
->generatordata
= tmp
;
2016 f
= &ast_null_frame
;
2020 /* Check for pending read queue */
2021 if (!AST_LIST_EMPTY(&chan
->readq
)) {
2022 f
= AST_LIST_REMOVE_HEAD(&chan
->readq
, frame_list
);
2023 /* Interpret hangup and return NULL */
2024 /* XXX why not the same for frames from the channel ? */
2025 if (f
->frametype
== AST_FRAME_CONTROL
&& f
->subclass
== AST_CONTROL_HANGUP
) {
2030 chan
->blocker
= pthread_self();
2031 if (ast_test_flag(chan
, AST_FLAG_EXCEPTION
)) {
2032 if (chan
->tech
->exception
)
2033 f
= chan
->tech
->exception(chan
);
2035 ast_log(LOG_WARNING
, "Exception flag set on '%s', but no exception handler\n", chan
->name
);
2036 f
= &ast_null_frame
;
2038 /* Clear the exception flag */
2039 ast_clear_flag(chan
, AST_FLAG_EXCEPTION
);
2040 } else if (chan
->tech
->read
)
2041 f
= chan
->tech
->read(chan
);
2043 ast_log(LOG_WARNING
, "No read routine on channel %s\n", chan
->name
);
2047 /* if the channel driver returned more than one frame, stuff the excess
2048 into the readq for the next ast_read call (note that we can safely assume
2049 that the readq is empty, because otherwise we would not have called into
2050 the channel driver and f would be only a single frame)
2052 if (AST_LIST_NEXT(f
, frame_list
)) {
2053 AST_LIST_HEAD_SET_NOLOCK(&chan
->readq
, AST_LIST_NEXT(f
, frame_list
));
2054 AST_LIST_NEXT(f
, frame_list
) = NULL
;
2057 switch (f
->frametype
) {
2058 case AST_FRAME_CONTROL
:
2059 if (f
->subclass
== AST_CONTROL_ANSWER
) {
2060 if (!ast_test_flag(chan
, AST_FLAG_OUTGOING
)) {
2062 ast_log(LOG_DEBUG
, "Ignoring answer on an inbound call!\n");
2064 f
= &ast_null_frame
;
2065 } else if (prestate
== AST_STATE_UP
) {
2067 ast_log(LOG_DEBUG
, "Dropping duplicate answer!\n");
2069 f
= &ast_null_frame
;
2071 /* Answer the CDR */
2072 ast_setstate(chan
, AST_STATE_UP
);
2073 if (!chan
->cdr
) { /* up till now, this insertion hasn't been done. Therefore,
2074 to keep from throwing off the basic order of the universe,
2075 we will try to keep this cdr from getting posted. */
2076 chan
->cdr
= ast_cdr_alloc();
2077 ast_cdr_init(chan
->cdr
, chan
);
2078 ast_cdr_start(chan
->cdr
);
2081 ast_cdr_answer(chan
->cdr
);
2085 case AST_FRAME_DTMF_END
:
2086 ast_log(LOG_DTMF
, "DTMF end '%c' received on %s, duration %ld ms\n", f
->subclass
, chan
->name
, f
->len
);
2087 /* Queue it up if DTMF is deffered, or if DTMF emulation is forced.
2088 * However, only let emulation be forced if the other end cares about BEGIN frames */
2089 if ( ast_test_flag(chan
, AST_FLAG_DEFER_DTMF
) ||
2090 (ast_test_flag(chan
, AST_FLAG_EMULATE_DTMF
) && !ast_test_flag(chan
, AST_FLAG_END_DTMF_ONLY
)) ) {
2091 if (strlen(chan
->dtmfq
) < sizeof(chan
->dtmfq
) - 2) {
2092 ast_log(LOG_DTMF
, "DTMF end '%c' put into dtmf queue on %s\n", f
->subclass
, chan
->name
);
2093 chan
->dtmfq
[strlen(chan
->dtmfq
)] = f
->subclass
;
2095 ast_log(LOG_WARNING
, "Dropping deferred DTMF digits on %s\n", chan
->name
);
2097 f
= &ast_null_frame
;
2098 } else if (!ast_test_flag(chan
, AST_FLAG_IN_DTMF
| AST_FLAG_END_DTMF_ONLY
)) {
2099 if (!ast_tvzero(chan
->dtmf_tv
) &&
2100 ast_tvdiff_ms(ast_tvnow(), chan
->dtmf_tv
) < AST_MIN_DTMF_GAP
) {
2101 /* If it hasn't been long enough, defer this digit */
2102 if (strlen(chan
->dtmfq
) < sizeof(chan
->dtmfq
) - 2) {
2103 ast_log(LOG_DTMF
, "DTMF end '%c' put into dtmf queue on %s\n", f
->subclass
, chan
->name
);
2104 chan
->dtmfq
[strlen(chan
->dtmfq
)] = f
->subclass
;
2106 ast_log(LOG_WARNING
, "Dropping deferred DTMF digits on %s\n", chan
->name
);
2108 f
= &ast_null_frame
;
2110 /* There was no begin, turn this into a begin and send the end later */
2111 f
->frametype
= AST_FRAME_DTMF_BEGIN
;
2112 ast_set_flag(chan
, AST_FLAG_EMULATE_DTMF
);
2113 chan
->emulate_dtmf_digit
= f
->subclass
;
2114 chan
->dtmf_tv
= ast_tvnow();
2116 if (f
->len
> AST_MIN_DTMF_DURATION
)
2117 chan
->emulate_dtmf_duration
= f
->len
;
2119 chan
->emulate_dtmf_duration
= AST_MIN_DTMF_DURATION
;
2121 chan
->emulate_dtmf_duration
= AST_DEFAULT_EMULATE_DTMF_DURATION
;
2122 ast_log(LOG_DTMF
, "DTMF begin emulation of '%c' with duration %u queued on %s\n", f
->subclass
, chan
->emulate_dtmf_duration
, chan
->name
);
2124 if (chan
->audiohooks
) {
2125 struct ast_frame
*old_frame
= f
;
2126 f
= ast_audiohook_write_list(chan
, chan
->audiohooks
, AST_AUDIOHOOK_DIRECTION_READ
, f
);
2128 ast_frfree(old_frame
);
2131 struct timeval now
= ast_tvnow();
2132 if (ast_test_flag(chan
, AST_FLAG_IN_DTMF
)) {
2133 ast_log(LOG_DTMF
, "DTMF end accepted with begin '%c' on %s\n", f
->subclass
, chan
->name
);
2134 ast_clear_flag(chan
, AST_FLAG_IN_DTMF
);
2136 f
->len
= ast_tvdiff_ms(now
, chan
->dtmf_tv
);
2137 } else if (!f
->len
) {
2138 ast_log(LOG_DTMF
, "DTMF end accepted without begin '%c' on %s\n", f
->subclass
, chan
->name
);
2139 f
->len
= AST_MIN_DTMF_DURATION
;
2141 if (f
->len
< AST_MIN_DTMF_DURATION
) {
2142 ast_log(LOG_DTMF
, "DTMF end '%c' has duration %ld but want minimum %d, emulating on %s\n", f
->subclass
, f
->len
, AST_MIN_DTMF_DURATION
, chan
->name
);
2143 ast_set_flag(chan
, AST_FLAG_EMULATE_DTMF
);
2144 chan
->emulate_dtmf_digit
= f
->subclass
;
2145 chan
->emulate_dtmf_duration
= AST_MIN_DTMF_DURATION
- f
->len
;
2147 f
= &ast_null_frame
;
2149 ast_log(LOG_DTMF
, "DTMF end passthrough '%c' on %s\n", f
->subclass
, chan
->name
);
2150 chan
->dtmf_tv
= now
;
2152 if (chan
->audiohooks
) {
2153 struct ast_frame
*old_frame
= f
;
2154 f
= ast_audiohook_write_list(chan
, chan
->audiohooks
, AST_AUDIOHOOK_DIRECTION_READ
, f
);
2156 ast_frfree(old_frame
);
2160 case AST_FRAME_DTMF_BEGIN
:
2161 ast_log(LOG_DTMF
, "DTMF begin '%c' received on %s\n", f
->subclass
, chan
->name
);
2162 if ( ast_test_flag(chan
, AST_FLAG_DEFER_DTMF
| AST_FLAG_END_DTMF_ONLY
| AST_FLAG_EMULATE_DTMF
) ||
2163 (!ast_tvzero(chan
->dtmf_tv
) &&
2164 ast_tvdiff_ms(ast_tvnow(), chan
->dtmf_tv
) < AST_MIN_DTMF_GAP
) ) {
2165 ast_log(LOG_DTMF
, "DTMF begin ignored '%c' on %s\n", f
->subclass
, chan
->name
);
2167 f
= &ast_null_frame
;
2169 ast_set_flag(chan
, AST_FLAG_IN_DTMF
);
2170 chan
->dtmf_tv
= ast_tvnow();
2171 ast_log(LOG_DTMF
, "DTMF begin passthrough '%c' on %s\n", f
->subclass
, chan
->name
);
2174 case AST_FRAME_NULL
:
2175 /* The EMULATE_DTMF flag must be cleared here as opposed to when the duration
2176 * is reached , because we want to make sure we pass at least one
2177 * voice frame through before starting the next digit, to ensure a gap
2178 * between DTMF digits. */
2179 if (ast_test_flag(chan
, AST_FLAG_EMULATE_DTMF
)) {
2180 struct timeval now
= ast_tvnow();
2181 if (!chan
->emulate_dtmf_duration
) {
2182 ast_clear_flag(chan
, AST_FLAG_EMULATE_DTMF
);
2183 chan
->emulate_dtmf_digit
= 0;
2184 } else if (ast_tvdiff_ms(now
, chan
->dtmf_tv
) >= chan
->emulate_dtmf_duration
) {
2185 chan
->emulate_dtmf_duration
= 0;
2188 f
->frametype
= AST_FRAME_DTMF_END
;
2189 f
->subclass
= chan
->emulate_dtmf_digit
;
2190 f
->len
= ast_tvdiff_ms(now
, chan
->dtmf_tv
);
2191 chan
->dtmf_tv
= now
;
2192 ast_clear_flag(chan
, AST_FLAG_EMULATE_DTMF
);
2193 chan
->emulate_dtmf_digit
= 0;
2194 ast_log(LOG_DTMF
, "DTMF end emulation of '%c' queued on %s\n", f
->subclass
, chan
->name
);
2198 case AST_FRAME_VOICE
:
2199 /* The EMULATE_DTMF flag must be cleared here as opposed to when the duration
2200 * is reached , because we want to make sure we pass at least one
2201 * voice frame through before starting the next digit, to ensure a gap
2202 * between DTMF digits. */
2203 if (ast_test_flag(chan
, AST_FLAG_EMULATE_DTMF
) && !chan
->emulate_dtmf_duration
) {
2204 ast_clear_flag(chan
, AST_FLAG_EMULATE_DTMF
);
2205 chan
->emulate_dtmf_digit
= 0;
2208 if (dropaudio
|| ast_test_flag(chan
, AST_FLAG_IN_DTMF
)) {
2210 ast_read_generator_actions(chan
, f
);
2212 f
= &ast_null_frame
;
2215 if (ast_test_flag(chan
, AST_FLAG_EMULATE_DTMF
) && !ast_test_flag(chan
, AST_FLAG_IN_DTMF
)) {
2216 struct timeval now
= ast_tvnow();
2217 if (ast_tvdiff_ms(now
, chan
->dtmf_tv
) >= chan
->emulate_dtmf_duration
) {
2218 chan
->emulate_dtmf_duration
= 0;
2221 f
->frametype
= AST_FRAME_DTMF_END
;
2222 f
->subclass
= chan
->emulate_dtmf_digit
;
2223 f
->len
= ast_tvdiff_ms(now
, chan
->dtmf_tv
);
2224 chan
->dtmf_tv
= now
;
2225 if (chan
->audiohooks
) {
2226 struct ast_frame
*old_frame
= f
;
2227 f
= ast_audiohook_write_list(chan
, chan
->audiohooks
, AST_AUDIOHOOK_DIRECTION_READ
, f
);
2229 ast_frfree(old_frame
);
2231 ast_log(LOG_DTMF
, "DTMF end emulation of '%c' queued on %s\n", f
->subclass
, chan
->name
);
2233 /* Drop voice frames while we're still in the middle of the digit */
2235 f
= &ast_null_frame
;
2237 } else if ((f
->frametype
== AST_FRAME_VOICE
) && !(f
->subclass
& chan
->nativeformats
)) {
2238 /* This frame can't be from the current native formats -- drop it on the
2240 ast_log(LOG_NOTICE
, "Dropping incompatible voice frame on %s of format %s since our native format has changed to %s\n",
2241 chan
->name
, ast_getformatname(f
->subclass
), ast_getformatname(chan
->nativeformats
));
2243 f
= &ast_null_frame
;
2244 } else if ((f
->frametype
== AST_FRAME_VOICE
)) {
2245 if (chan
->audiohooks
) {
2246 struct ast_frame
*old_frame
= f
;
2247 f
= ast_audiohook_write_list(chan
, chan
->audiohooks
, AST_AUDIOHOOK_DIRECTION_READ
, f
);
2249 ast_frfree(old_frame
);
2251 if (chan
->monitor
&& chan
->monitor
->read_stream
) {
2252 /* XXX what does this do ? */
2253 #ifndef MONITOR_CONSTANT_DELAY
2254 int jump
= chan
->outsmpl
- chan
->insmpl
- 4 * f
->samples
;
2256 jump
= chan
->outsmpl
- chan
->insmpl
;
2257 if (ast_seekstream(chan
->monitor
->read_stream
, jump
, SEEK_FORCECUR
) == -1)
2258 ast_log(LOG_WARNING
, "Failed to perform seek in monitoring read stream, synchronization between the files may be broken\n");
2259 chan
->insmpl
+= jump
+ f
->samples
;
2261 chan
->insmpl
+= f
->samples
;
2263 int jump
= chan
->outsmpl
- chan
->insmpl
;
2264 if (jump
- MONITOR_DELAY
>= 0) {
2265 if (ast_seekstream(chan
->monitor
->read_stream
, jump
- f
->samples
, SEEK_FORCECUR
) == -1)
2266 ast_log(LOG_WARNING
, "Failed to perform seek in monitoring read stream, synchronization between the files may be broken\n");
2267 chan
->insmpl
+= jump
;
2269 chan
->insmpl
+= f
->samples
;
2271 if (chan
->monitor
->state
== AST_MONITOR_RUNNING
) {
2272 if (ast_writestream(chan
->monitor
->read_stream
, f
) < 0)
2273 ast_log(LOG_WARNING
, "Failed to write data to channel monitor read stream\n");
2277 if (chan
->readtrans
&& (f
= ast_translate(chan
->readtrans
, f
, 1)) == NULL
)
2278 f
= &ast_null_frame
;
2280 /* Run generator sitting on the line if timing device not available
2281 * and synchronous generation of outgoing frames is necessary */
2282 ast_read_generator_actions(chan
, f
);
2285 /* Just pass it on! */
2289 /* Make sure we always return NULL in the future */
2290 chan
->_softhangup
|= AST_SOFTHANGUP_DEV
;
2291 if (chan
->generator
)
2292 ast_deactivate_generator(chan
);
2293 /* End the CDR if appropriate */
2295 ast_cdr_end(chan
->cdr
);
2298 /* High bit prints debugging */
2299 if (chan
->fin
& DEBUGCHAN_FLAG
)
2300 ast_frame_dump(chan
->name
, f
, "<<");
2301 chan
->fin
= FRAMECOUNT_INC(chan
->fin
);
2304 ast_channel_unlock(chan
);
2308 int ast_internal_timing_enabled(struct ast_channel
*chan
)
2310 int ret
= ast_opt_internal_timing
&& chan
->timingfd
> -1;
2311 if (option_debug
> 4)
2312 ast_log(LOG_DEBUG
, "Internal timing is %s (option_internal_timing=%d chan->timingfd=%d)\n", ret
? "enabled": "disabled", ast_opt_internal_timing
, chan
->timingfd
);
2316 struct ast_frame
*ast_read(struct ast_channel
*chan
)
2318 return __ast_read(chan
, 0);
2321 struct ast_frame
*ast_read_noaudio(struct ast_channel
*chan
)
2323 return __ast_read(chan
, 1);
2326 int ast_indicate(struct ast_channel
*chan
, int condition
)
2328 return ast_indicate_data(chan
, condition
, NULL
, 0);
2331 int ast_indicate_data(struct ast_channel
*chan
, int condition
, const void *data
, size_t datalen
)
2335 ast_channel_lock(chan
);
2336 /* Stop if we're a zombie or need a soft hangup */
2337 if (ast_test_flag(chan
, AST_FLAG_ZOMBIE
) || ast_check_hangup(chan
)) {
2338 ast_channel_unlock(chan
);
2341 if (chan
->tech
->indicate
)
2342 res
= chan
->tech
->indicate(chan
, condition
, data
, datalen
);
2343 ast_channel_unlock(chan
);
2344 if (!chan
->tech
->indicate
|| res
) {
2346 * Device does not support (that) indication, lets fake
2347 * it by doing our own tone generation. (PM2002)
2350 ast_playtones_stop(chan
);
2352 const struct tone_zone_sound
*ts
= NULL
;
2353 switch (condition
) {
2354 case AST_CONTROL_RINGING
:
2355 ts
= ast_get_indication_tone(chan
->zone
, "ring");
2357 case AST_CONTROL_BUSY
:
2358 ts
= ast_get_indication_tone(chan
->zone
, "busy");
2360 case AST_CONTROL_CONGESTION
:
2361 ts
= ast_get_indication_tone(chan
->zone
, "congestion");
2364 if (ts
&& ts
->data
[0]) {
2366 ast_log(LOG_DEBUG
, "Driver for channel '%s' does not support indication %d, emulating it\n", chan
->name
, condition
);
2367 ast_playtones_start(chan
,0,ts
->data
, 1);
2369 chan
->visible_indication
= condition
;
2370 } else if (condition
== AST_CONTROL_PROGRESS
) {
2371 /* ast_playtones_stop(chan); */
2372 } else if (condition
== AST_CONTROL_PROCEEDING
) {
2373 /* Do nothing, really */
2374 } else if (condition
== AST_CONTROL_HOLD
) {
2375 /* Do nothing.... */
2376 } else if (condition
== AST_CONTROL_UNHOLD
) {
2377 /* Do nothing.... */
2378 } else if (condition
== AST_CONTROL_VIDUPDATE
) {
2379 /* Do nothing.... */
2380 } else if (condition
== AST_CONTROL_SRCUPDATE
) {
2384 ast_log(LOG_WARNING
, "Unable to handle indication %d for '%s'\n", condition
, chan
->name
);
2389 chan
->visible_indication
= condition
;
2394 int ast_recvchar(struct ast_channel
*chan
, int timeout
)
2397 char *buf
= ast_recvtext(chan
, timeout
);
2399 return -1; /* error or timeout */
2400 c
= *(unsigned char *)buf
;
2405 char *ast_recvtext(struct ast_channel
*chan
, int timeout
)
2411 struct ast_frame
*f
;
2412 if (ast_check_hangup(chan
))
2414 res
= ast_waitfor(chan
, timeout
);
2415 if (res
<= 0) /* timeout or error */
2417 timeout
= res
; /* update timeout */
2420 break; /* no frame */
2421 if (f
->frametype
== AST_FRAME_CONTROL
&& f
->subclass
== AST_CONTROL_HANGUP
)
2422 done
= 1; /* force a break */
2423 else if (f
->frametype
== AST_FRAME_TEXT
) { /* what we want */
2424 buf
= ast_strndup((char *) f
->data
, f
->datalen
); /* dup and break */
2432 int ast_sendtext(struct ast_channel
*chan
, const char *text
)
2435 /* Stop if we're a zombie or need a soft hangup */
2436 if (ast_test_flag(chan
, AST_FLAG_ZOMBIE
) || ast_check_hangup(chan
))
2438 CHECK_BLOCKING(chan
);
2439 if (chan
->tech
->send_text
)
2440 res
= chan
->tech
->send_text(chan
, text
);
2441 ast_clear_flag(chan
, AST_FLAG_BLOCKING
);
2445 int ast_senddigit_begin(struct ast_channel
*chan
, char digit
)
2447 /* Device does not support DTMF tones, lets fake
2448 * it by doing our own generation. */
2449 static const char* dtmf_tones
[] = {
2468 if (!chan
->tech
->send_digit_begin
)
2471 if (!chan
->tech
->send_digit_begin(chan
, digit
))
2474 if (digit
>= '0' && digit
<='9')
2475 ast_playtones_start(chan
, 0, dtmf_tones
[digit
-'0'], 0);
2476 else if (digit
>= 'A' && digit
<= 'D')
2477 ast_playtones_start(chan
, 0, dtmf_tones
[digit
-'A'+10], 0);
2478 else if (digit
== '*')
2479 ast_playtones_start(chan
, 0, dtmf_tones
[14], 0);
2480 else if (digit
== '#')
2481 ast_playtones_start(chan
, 0, dtmf_tones
[15], 0);
2485 ast_log(LOG_DEBUG
, "Unable to generate DTMF tone '%c' for '%s'\n", digit
, chan
->name
);
2491 int ast_senddigit_end(struct ast_channel
*chan
, char digit
, unsigned int duration
)
2495 if (chan
->tech
->send_digit_end
)
2496 res
= chan
->tech
->send_digit_end(chan
, digit
, duration
);
2498 if (res
&& chan
->generator
)
2499 ast_playtones_stop(chan
);
2504 int ast_senddigit(struct ast_channel
*chan
, char digit
)
2506 if (chan
->tech
->send_digit_begin
) {
2507 ast_senddigit_begin(chan
, digit
);
2508 ast_safe_sleep(chan
, AST_DEFAULT_EMULATE_DTMF_DURATION
);
2511 return ast_senddigit_end(chan
, digit
, AST_DEFAULT_EMULATE_DTMF_DURATION
);
2514 int ast_prod(struct ast_channel
*chan
)
2516 struct ast_frame a
= { AST_FRAME_VOICE
};
2519 /* Send an empty audio frame to get things moving */
2520 if (chan
->_state
!= AST_STATE_UP
) {
2522 ast_log(LOG_DEBUG
, "Prodding channel '%s'\n", chan
->name
);
2523 a
.subclass
= chan
->rawwriteformat
;
2524 a
.data
= nothing
+ AST_FRIENDLY_OFFSET
;
2526 if (ast_write(chan
, &a
))
2527 ast_log(LOG_WARNING
, "Prodding channel '%s' failed\n", chan
->name
);
2532 int ast_write_video(struct ast_channel
*chan
, struct ast_frame
*fr
)
2535 if (!chan
->tech
->write_video
)
2537 res
= ast_write(chan
, fr
);
2543 int ast_write(struct ast_channel
*chan
, struct ast_frame
*fr
)
2547 struct ast_frame
*f
= NULL
, *f2
= NULL
;
2549 /*Deadlock avoidance*/
2550 while(ast_channel_trylock(chan
)) {
2551 /*cannot goto done since the channel is not locked*/
2554 ast_log(LOG_DEBUG
, "Deadlock avoided for write to channel '%s'\n", chan
->name
);
2559 /* Stop if we're a zombie or need a soft hangup */
2560 if (ast_test_flag(chan
, AST_FLAG_ZOMBIE
) || ast_check_hangup(chan
))
2563 /* Handle any pending masquerades */
2564 if (chan
->masq
&& ast_do_masquerade(chan
)) {
2565 ast_log(LOG_WARNING
, "Failed to perform masquerade\n");
2569 res
= 0; /* XXX explain, why 0 ? */
2572 if (chan
->generatordata
) {
2573 if (ast_test_flag(chan
, AST_FLAG_WRITE_INT
))
2574 ast_deactivate_generator(chan
);
2576 if (fr
->frametype
== AST_FRAME_DTMF_END
) {
2577 /* There is a generator running while we're in the middle of a digit.
2578 * It's probably inband DTMF, so go ahead and pass it so it can
2579 * stop the generator */
2580 ast_clear_flag(chan
, AST_FLAG_BLOCKING
);
2581 ast_channel_unlock(chan
);
2582 res
= ast_senddigit_end(chan
, fr
->subclass
, fr
->len
);
2583 ast_channel_lock(chan
);
2584 CHECK_BLOCKING(chan
);
2585 } else if (fr
->frametype
== AST_FRAME_CONTROL
&& fr
->subclass
== AST_CONTROL_UNHOLD
) {
2586 /* This is a side case where Echo is basically being called and the person put themselves on hold and took themselves off hold */
2587 res
= (chan
->tech
->indicate
== NULL
) ? 0 :
2588 chan
->tech
->indicate(chan
, fr
->subclass
, fr
->data
, fr
->datalen
);
2590 res
= 0; /* XXX explain, why 0 ? */
2594 /* High bit prints debugging */
2595 if (chan
->fout
& DEBUGCHAN_FLAG
)
2596 ast_frame_dump(chan
->name
, fr
, ">>");
2597 CHECK_BLOCKING(chan
);
2598 switch(fr
->frametype
) {
2599 case AST_FRAME_CONTROL
:
2600 res
= (chan
->tech
->indicate
== NULL
) ? 0 :
2601 chan
->tech
->indicate(chan
, fr
->subclass
, fr
->data
, fr
->datalen
);
2603 case AST_FRAME_DTMF_BEGIN
:
2604 if (chan
->audiohooks
) {
2605 struct ast_frame
*old_frame
= fr
;
2606 fr
= ast_audiohook_write_list(chan
, chan
->audiohooks
, AST_AUDIOHOOK_DIRECTION_WRITE
, fr
);
2607 if (old_frame
!= fr
)
2610 ast_clear_flag(chan
, AST_FLAG_BLOCKING
);
2611 ast_channel_unlock(chan
);
2612 res
= ast_senddigit_begin(chan
, fr
->subclass
);
2613 ast_channel_lock(chan
);
2614 CHECK_BLOCKING(chan
);
2616 case AST_FRAME_DTMF_END
:
2617 if (chan
->audiohooks
) {
2618 struct ast_frame
*old_frame
= fr
;
2619 fr
= ast_audiohook_write_list(chan
, chan
->audiohooks
, AST_AUDIOHOOK_DIRECTION_WRITE
, fr
);
2620 if (old_frame
!= fr
)
2623 ast_clear_flag(chan
, AST_FLAG_BLOCKING
);
2624 ast_channel_unlock(chan
);
2625 res
= ast_senddigit_end(chan
, fr
->subclass
, fr
->len
);
2626 ast_channel_lock(chan
);
2627 CHECK_BLOCKING(chan
);
2629 case AST_FRAME_TEXT
:
2630 res
= (chan
->tech
->send_text
== NULL
) ? 0 :
2631 chan
->tech
->send_text(chan
, (char *) fr
->data
);
2633 case AST_FRAME_HTML
:
2634 res
= (chan
->tech
->send_html
== NULL
) ? 0 :
2635 chan
->tech
->send_html(chan
, fr
->subclass
, (char *) fr
->data
, fr
->datalen
);
2637 case AST_FRAME_VIDEO
:
2638 /* XXX Handle translation of video codecs one day XXX */
2639 res
= (chan
->tech
->write_video
== NULL
) ? 0 :
2640 chan
->tech
->write_video(chan
, fr
);
2642 case AST_FRAME_MODEM
:
2643 res
= (chan
->tech
->write
== NULL
) ? 0 :
2644 chan
->tech
->write(chan
, fr
);
2646 case AST_FRAME_VOICE
:
2647 if (chan
->tech
->write
== NULL
)
2648 break; /*! \todo XXX should return 0 maybe ? */
2650 if (chan
->audiohooks
) {
2651 struct ast_frame
*old_frame
= fr
;
2652 fr
= ast_audiohook_write_list(chan
, chan
->audiohooks
, AST_AUDIOHOOK_DIRECTION_WRITE
, fr
);
2653 if (old_frame
!= fr
)
2657 /* If the frame is in the raw write format, then it's easy... just use the frame - otherwise we will have to translate */
2658 if (fr
->subclass
== chan
->rawwriteformat
)
2661 f
= (chan
->writetrans
) ? ast_translate(chan
->writetrans
, fr
, 0) : fr
;
2663 /* If we have no frame of audio, then we have to bail out */
2669 /* If Monitor is running on this channel, then we have to write frames out there too */
2670 if (chan
->monitor
&& chan
->monitor
->write_stream
) {
2671 /* XXX must explain this code */
2672 #ifndef MONITOR_CONSTANT_DELAY
2673 int jump
= chan
->insmpl
- chan
->outsmpl
- 4 * f
->samples
;
2675 jump
= chan
->insmpl
- chan
->outsmpl
;
2676 if (ast_seekstream(chan
->monitor
->write_stream
, jump
, SEEK_FORCECUR
) == -1)
2677 ast_log(LOG_WARNING
, "Failed to perform seek in monitoring write stream, synchronization between the files may be broken\n");
2678 chan
->outsmpl
+= jump
+ f
->samples
;
2680 chan
->outsmpl
+= f
->samples
;
2682 int jump
= chan
->insmpl
- chan
->outsmpl
;
2683 if (jump
- MONITOR_DELAY
>= 0) {
2684 if (ast_seekstream(chan
->monitor
->write_stream
, jump
- f
->samples
, SEEK_FORCECUR
) == -1)
2685 ast_log(LOG_WARNING
, "Failed to perform seek in monitoring write stream, synchronization between the files may be broken\n");
2686 chan
->outsmpl
+= jump
;
2688 chan
->outsmpl
+= f
->samples
;
2690 if (chan
->monitor
->state
== AST_MONITOR_RUNNING
) {
2691 if (ast_writestream(chan
->monitor
->write_stream
, f
) < 0)
2692 ast_log(LOG_WARNING
, "Failed to write data to channel monitor write stream\n");
2697 res
= chan
->tech
->write(chan
,f
);
2701 case AST_FRAME_NULL
:
2707 /* At this point, fr is the incoming frame and f is NULL. Channels do
2708 * not expect to get NULL as a frame pointer and will segfault. Hence,
2709 * we output the original frame passed in. */
2710 res
= chan
->tech
->write(chan
, fr
);
2718 ast_clear_flag(chan
, AST_FLAG_BLOCKING
);
2719 /* Consider a write failure to force a soft hangup */
2721 chan
->_softhangup
|= AST_SOFTHANGUP_DEV
;
2723 chan
->fout
= FRAMECOUNT_INC(chan
->fout
);
2726 ast_channel_unlock(chan
);
2730 static int set_format(struct ast_channel
*chan
, int fmt
, int *rawformat
, int *format
,
2731 struct ast_trans_pvt
**trans
, const int direction
)
2736 /* Make sure we only consider audio */
2737 fmt
&= AST_FORMAT_AUDIO_MASK
;
2739 native
= chan
->nativeformats
;
2740 /* Find a translation path from the native format to one of the desired formats */
2743 res
= ast_translator_best_choice(&fmt
, &native
);
2746 res
= ast_translator_best_choice(&native
, &fmt
);
2749 ast_log(LOG_WARNING
, "Unable to find a codec translation path from %s to %s\n",
2750 ast_getformatname(native
), ast_getformatname(fmt
));
2754 /* Now we have a good choice for both. */
2755 ast_channel_lock(chan
);
2757 if ((*rawformat
== native
) && (*format
== fmt
) && ((*rawformat
== *format
) || (*trans
))) {
2758 /* the channel is already in these formats, so nothing to do */
2759 ast_channel_unlock(chan
);
2763 *rawformat
= native
;
2764 /* User perspective is fmt */
2766 /* Free any read translation we have right now */
2768 ast_translator_free_path(*trans
);
2769 /* Build a translation path from the raw format to the desired format */
2772 *trans
= ast_translator_build_path(*format
, *rawformat
);
2775 *trans
= ast_translator_build_path(*rawformat
, *format
);
2776 ast_channel_unlock(chan
);
2778 ast_log(LOG_DEBUG
, "Set channel %s to %s format %s\n", chan
->name
,
2779 direction
? "write" : "read", ast_getformatname(fmt
));
2783 int ast_set_read_format(struct ast_channel
*chan
, int fmt
)
2785 return set_format(chan
, fmt
, &chan
->rawreadformat
, &chan
->readformat
,
2786 &chan
->readtrans
, 0);
2789 int ast_set_write_format(struct ast_channel
*chan
, int fmt
)
2791 return set_format(chan
, fmt
, &chan
->rawwriteformat
, &chan
->writeformat
,
2792 &chan
->writetrans
, 1);
2795 char *ast_channel_reason2str(int reason
)
2797 switch (reason
) /* the following appear to be the only ones actually returned by request_and_dial */
2800 return "Call Failure (not BUSY, and not NO_ANSWER, maybe Circuit busy or down?)";
2801 case AST_CONTROL_HANGUP
:
2803 case AST_CONTROL_RING
:
2804 return "Local Ring";
2805 case AST_CONTROL_RINGING
:
2806 return "Remote end Ringing";
2807 case AST_CONTROL_ANSWER
:
2808 return "Remote end has Answered";
2809 case AST_CONTROL_BUSY
:
2810 return "Remote end is Busy";
2811 case AST_CONTROL_CONGESTION
:
2812 return "Congestion (circuits busy)";
2814 return "Unknown Reason!!";
2818 struct ast_channel
*__ast_request_and_dial(const char *type
, int format
, void *data
, int timeout
, int *outstate
, const char *cid_num
, const char *cid_name
, struct outgoing_helper
*oh
)
2822 struct ast_channel
*chan
;
2824 int last_subclass
= 0;
2829 outstate
= &dummy_outstate
; /* make outstate always a valid pointer */
2831 chan
= ast_request(type
, format
, data
, &cause
);
2833 ast_log(LOG_NOTICE
, "Unable to request channel %s/%s\n", type
, (char *)data
);
2834 /* compute error and return */
2835 if (cause
== AST_CAUSE_BUSY
)
2836 *outstate
= AST_CONTROL_BUSY
;
2837 else if (cause
== AST_CAUSE_CONGESTION
)
2838 *outstate
= AST_CONTROL_CONGESTION
;
2844 ast_set_variables(chan
, oh
->vars
);
2845 /* XXX why is this necessary, for the parent_channel perhaps ? */
2846 if (!ast_strlen_zero(oh
->cid_num
) && !ast_strlen_zero(oh
->cid_name
))
2847 ast_set_callerid(chan
, oh
->cid_num
, oh
->cid_name
, oh
->cid_num
);
2848 if (oh
->parent_channel
)
2849 ast_channel_inherit_variables(oh
->parent_channel
, chan
);
2851 ast_cdr_setaccount(chan
, oh
->account
);
2853 ast_set_callerid(chan
, cid_num
, cid_name
, cid_num
);
2857 if (!chan
->cdr
) { /* up till now, this insertion hasn't been done. Therefore,
2858 to keep from throwing off the basic order of the universe,
2859 we will try to keep this cdr from getting posted. */
2860 chan
->cdr
= ast_cdr_alloc();
2861 ast_cdr_init(chan
->cdr
, chan
);
2862 ast_cdr_start(chan
->cdr
);
2864 if (ast_call(chan
, data
, 0)) { /* ast_call failed... */
2865 ast_log(LOG_NOTICE
, "Unable to call channel %s/%s\n", type
, (char *)data
);
2867 res
= 1; /* mark success in case chan->_state is already AST_STATE_UP */
2868 while (timeout
&& chan
->_state
!= AST_STATE_UP
) {
2869 struct ast_frame
*f
;
2870 res
= ast_waitfor(chan
, timeout
);
2871 if (res
<= 0) /* error, timeout, or done */
2877 *outstate
= AST_CONTROL_HANGUP
;
2881 if (f
->frametype
== AST_FRAME_CONTROL
) {
2882 switch (f
->subclass
) {
2883 case AST_CONTROL_RINGING
: /* record but keep going */
2884 *outstate
= f
->subclass
;
2887 case AST_CONTROL_BUSY
:
2888 case AST_CONTROL_CONGESTION
:
2889 case AST_CONTROL_ANSWER
:
2890 *outstate
= f
->subclass
;
2891 timeout
= 0; /* trick to force exit from the while() */
2895 case AST_CONTROL_PROGRESS
:
2896 case AST_CONTROL_PROCEEDING
:
2897 case AST_CONTROL_HOLD
:
2898 case AST_CONTROL_UNHOLD
:
2899 case AST_CONTROL_VIDUPDATE
:
2900 case AST_CONTROL_SRCUPDATE
:
2901 case -1: /* Ignore -- just stopping indications */
2905 ast_log(LOG_NOTICE
, "Don't know what to do with control frame %d\n", f
->subclass
);
2907 last_subclass
= f
->subclass
;
2915 if (!ast_strlen_zero(oh
->context
))
2916 ast_copy_string(chan
->context
, oh
->context
, sizeof(chan
->context
));
2917 if (!ast_strlen_zero(oh
->exten
))
2918 ast_copy_string(chan
->exten
, oh
->exten
, sizeof(chan
->exten
));
2920 chan
->priority
= oh
->priority
;
2922 if (chan
->_state
== AST_STATE_UP
)
2923 *outstate
= AST_CONTROL_ANSWER
;
2926 if ( AST_CONTROL_RINGING
== last_subclass
)
2927 chan
->hangupcause
= AST_CAUSE_NO_ANSWER
;
2928 if (!chan
->cdr
&& (chan
->cdr
= ast_cdr_alloc()))
2929 ast_cdr_init(chan
->cdr
, chan
);
2932 snprintf(tmp
, sizeof(tmp
), "%s/%s", type
, (char *)data
);
2933 ast_cdr_setapp(chan
->cdr
,"Dial",tmp
);
2934 ast_cdr_update(chan
);
2935 ast_cdr_start(chan
->cdr
);
2936 ast_cdr_end(chan
->cdr
);
2937 /* If the cause wasn't handled properly */
2938 if (ast_cdr_disposition(chan
->cdr
,chan
->hangupcause
))
2939 ast_cdr_failed(chan
->cdr
);
2947 struct ast_channel
*ast_request_and_dial(const char *type
, int format
, void *data
, int timeout
, int *outstate
, const char *cidnum
, const char *cidname
)
2949 return __ast_request_and_dial(type
, format
, data
, timeout
, outstate
, cidnum
, cidname
, NULL
);
2952 struct ast_channel
*ast_request(const char *type
, int format
, void *data
, int *cause
)
2954 struct chanlist
*chan
;
2955 struct ast_channel
*c
;
2960 int videoformat
= format
& AST_FORMAT_VIDEO_MASK
;
2964 *cause
= AST_CAUSE_NOTDEFINED
;
2966 if (AST_LIST_LOCK(&channels
)) {
2967 ast_log(LOG_WARNING
, "Unable to lock channel list\n");
2971 AST_LIST_TRAVERSE(&backends
, chan
, list
) {
2972 if (strcasecmp(type
, chan
->tech
->type
))
2975 capabilities
= chan
->tech
->capabilities
;
2976 fmt
= format
& AST_FORMAT_AUDIO_MASK
;
2977 res
= ast_translator_best_choice(&fmt
, &capabilities
);
2979 ast_log(LOG_WARNING
, "No translator path exists for channel type %s (native %d) to %d\n", type
, chan
->tech
->capabilities
, format
);
2980 *cause
= AST_CAUSE_BEARERCAPABILITY_NOTAVAIL
;
2981 AST_LIST_UNLOCK(&channels
);
2984 AST_LIST_UNLOCK(&channels
);
2985 if (!chan
->tech
->requester
)
2988 if (!(c
= chan
->tech
->requester(type
, capabilities
| videoformat
, data
, cause
)))
2991 /* no need to generate a Newchannel event here; it is done in the channel_alloc call */
2995 ast_log(LOG_WARNING
, "No channel type registered for '%s'\n", type
);
2996 *cause
= AST_CAUSE_NOSUCHDRIVER
;
2997 AST_LIST_UNLOCK(&channels
);
3002 int ast_call(struct ast_channel
*chan
, char *addr
, int timeout
)
3004 /* Place an outgoing call, but don't wait any longer than timeout ms before returning.
3005 If the remote end does not answer within the timeout, then do NOT hang up, but
3008 /* Stop if we're a zombie or need a soft hangup */
3009 ast_channel_lock(chan
);
3010 if (!ast_test_flag(chan
, AST_FLAG_ZOMBIE
) && !ast_check_hangup(chan
)) {
3011 if (chan
->tech
->call
)
3012 res
= chan
->tech
->call(chan
, addr
, timeout
);
3013 ast_set_flag(chan
, AST_FLAG_OUTGOING
);
3015 ast_channel_unlock(chan
);
3020 \brief Transfer a call to dest, if the channel supports transfer
3024 \arg the manager interface
3026 int ast_transfer(struct ast_channel
*chan
, char *dest
)
3030 /* Stop if we're a zombie or need a soft hangup */
3031 ast_channel_lock(chan
);
3032 if (!ast_test_flag(chan
, AST_FLAG_ZOMBIE
) && !ast_check_hangup(chan
)) {
3033 if (chan
->tech
->transfer
) {
3034 res
= chan
->tech
->transfer(chan
, dest
);
3040 ast_channel_unlock(chan
);
3044 int ast_readstring(struct ast_channel
*c
, char *s
, int len
, int timeout
, int ftimeout
, char *enders
)
3046 return ast_readstring_full(c
, s
, len
, timeout
, ftimeout
, enders
, -1, -1);
3049 int ast_readstring_full(struct ast_channel
*c
, char *s
, int len
, int timeout
, int ftimeout
, char *enders
, int audiofd
, int ctrlfd
)
3051 int pos
= 0; /* index in the buffer where we accumulate digits */
3054 /* Stop if we're a zombie or need a soft hangup */
3055 if (ast_test_flag(c
, AST_FLAG_ZOMBIE
) || ast_check_hangup(c
))
3062 d
= ast_waitstream_full(c
, AST_DIGIT_ANY
, audiofd
, ctrlfd
);
3066 d
= ast_waitfordigit_full(c
, to
, audiofd
, ctrlfd
);
3068 d
= ast_waitfordigit_full(c
, to
, audiofd
, ctrlfd
);
3080 if (!strchr(enders
, d
))
3082 if (strchr(enders
, d
) || (pos
>= len
)) {
3092 int ast_channel_supports_html(struct ast_channel
*chan
)
3094 return (chan
->tech
->send_html
) ? 1 : 0;
3097 int ast_channel_sendhtml(struct ast_channel
*chan
, int subclass
, const char *data
, int datalen
)
3099 if (chan
->tech
->send_html
)
3100 return chan
->tech
->send_html(chan
, subclass
, data
, datalen
);
3104 int ast_channel_sendurl(struct ast_channel
*chan
, const char *url
)
3106 return ast_channel_sendhtml(chan
, AST_HTML_URL
, url
, strlen(url
) + 1);
3109 int ast_channel_make_compatible(struct ast_channel
*chan
, struct ast_channel
*peer
)
3114 if (chan
->readformat
== peer
->writeformat
&& chan
->writeformat
== peer
->readformat
) {
3115 /* Already compatible! Moving on ... */
3119 /* Set up translation from the chan to the peer */
3120 src
= chan
->nativeformats
;
3121 dst
= peer
->nativeformats
;
3122 if (ast_translator_best_choice(&dst
, &src
) < 0) {
3123 ast_log(LOG_WARNING
, "No path to translate from %s(%d) to %s(%d)\n", chan
->name
, src
, peer
->name
, dst
);
3127 /* if the best path is not 'pass through', then
3128 transcoding is needed; if desired, force transcode path
3129 to use SLINEAR between channels, but only if there is
3130 no direct conversion available */
3131 if ((src
!= dst
) && ast_opt_transcode_via_slin
&&
3132 (ast_translate_path_steps(dst
, src
) != 1))
3133 dst
= AST_FORMAT_SLINEAR
;
3134 if (ast_set_read_format(chan
, dst
) < 0) {
3135 ast_log(LOG_WARNING
, "Unable to set read format on channel %s to %d\n", chan
->name
, dst
);
3138 if (ast_set_write_format(peer
, dst
) < 0) {
3139 ast_log(LOG_WARNING
, "Unable to set write format on channel %s to %d\n", peer
->name
, dst
);
3143 /* Set up translation from the peer to the chan */
3144 src
= peer
->nativeformats
;
3145 dst
= chan
->nativeformats
;
3146 if (ast_translator_best_choice(&dst
, &src
) < 0) {
3147 ast_log(LOG_WARNING
, "No path to translate from %s(%d) to %s(%d)\n", peer
->name
, src
, chan
->name
, dst
);
3151 /* if the best path is not 'pass through', then
3152 transcoding is needed; if desired, force transcode path
3153 to use SLINEAR between channels, but only if there is
3154 no direct conversion available */
3155 if ((src
!= dst
) && ast_opt_transcode_via_slin
&&
3156 (ast_translate_path_steps(dst
, src
) != 1))
3157 dst
= AST_FORMAT_SLINEAR
;
3158 if (ast_set_read_format(peer
, dst
) < 0) {
3159 ast_log(LOG_WARNING
, "Unable to set read format on channel %s to %d\n", peer
->name
, dst
);
3162 if (ast_set_write_format(chan
, dst
) < 0) {
3163 ast_log(LOG_WARNING
, "Unable to set write format on channel %s to %d\n", chan
->name
, dst
);
3169 int ast_channel_masquerade(struct ast_channel
*original
, struct ast_channel
*clone
)
3172 struct ast_channel
*final_orig
, *final_clone
, *base
;
3175 final_orig
= original
;
3176 final_clone
= clone
;
3178 ast_channel_lock(original
);
3179 while (ast_channel_trylock(clone
)) {
3180 ast_channel_unlock(original
);
3182 ast_channel_lock(original
);
3185 /* each of these channels may be sitting behind a channel proxy (i.e. chan_agent)
3186 and if so, we don't really want to masquerade it, but its proxy */
3187 if (original
->_bridge
&& (original
->_bridge
!= ast_bridged_channel(original
)) && (original
->_bridge
->_bridge
!= original
))
3188 final_orig
= original
->_bridge
;
3190 if (clone
->_bridge
&& (clone
->_bridge
!= ast_bridged_channel(clone
)) && (clone
->_bridge
->_bridge
!= clone
))
3191 final_clone
= clone
->_bridge
;
3193 if (final_clone
->tech
->get_base_channel
&& (base
= final_clone
->tech
->get_base_channel(final_clone
))) {
3197 if ((final_orig
!= original
) || (final_clone
!= clone
)) {
3198 /* Lots and lots of deadlock avoidance. The main one we're competing with
3199 * is ast_write(), which locks channels recursively, when working with a
3201 if (ast_channel_trylock(final_orig
)) {
3202 ast_channel_unlock(clone
);
3203 ast_channel_unlock(original
);
3206 if (ast_channel_trylock(final_clone
)) {
3207 ast_channel_unlock(final_orig
);
3208 ast_channel_unlock(clone
);
3209 ast_channel_unlock(original
);
3212 ast_channel_unlock(clone
);
3213 ast_channel_unlock(original
);
3214 original
= final_orig
;
3215 clone
= final_clone
;
3218 if (original
== clone
) {
3219 ast_log(LOG_WARNING
, "Can't masquerade channel '%s' into itself!\n", original
->name
);
3220 ast_channel_unlock(clone
);
3221 ast_channel_unlock(original
);
3226 ast_log(LOG_DEBUG
, "Planning to masquerade channel %s into the structure of %s\n",
3227 clone
->name
, original
->name
);
3228 if (original
->masq
) {
3229 ast_log(LOG_WARNING
, "%s is already going to masquerade as %s\n",
3230 original
->masq
->name
, original
->name
);
3231 } else if (clone
->masqr
) {
3232 ast_log(LOG_WARNING
, "%s is already going to masquerade as %s\n",
3233 clone
->name
, clone
->masqr
->name
);
3235 original
->masq
= clone
;
3236 clone
->masqr
= original
;
3237 ast_queue_frame(original
, &ast_null_frame
);
3238 ast_queue_frame(clone
, &ast_null_frame
);
3240 ast_log(LOG_DEBUG
, "Done planning to masquerade channel %s into the structure of %s\n", clone
->name
, original
->name
);
3244 ast_channel_unlock(clone
);
3245 ast_channel_unlock(original
);
3250 void ast_change_name(struct ast_channel
*chan
, char *newname
)
3252 manager_event(EVENT_FLAG_CALL
, "Rename", "Oldname: %s\r\nNewname: %s\r\nUniqueid: %s\r\n", chan
->name
, newname
, chan
->uniqueid
);
3253 ast_string_field_set(chan
, name
, newname
);
3256 void ast_channel_inherit_variables(const struct ast_channel
*parent
, struct ast_channel
*child
)
3258 struct ast_var_t
*current
, *newvar
;
3259 const char *varname
;
3261 AST_LIST_TRAVERSE(&parent
->varshead
, current
, entries
) {
3264 varname
= ast_var_full_name(current
);
3268 if (varname
[0] == '_') {
3270 if (varname
[1] == '_')
3276 newvar
= ast_var_assign(&varname
[1], ast_var_value(current
));
3278 AST_LIST_INSERT_TAIL(&child
->varshead
, newvar
, entries
);
3280 ast_log(LOG_DEBUG
, "Copying soft-transferable variable %s.\n", ast_var_name(newvar
));
3284 newvar
= ast_var_assign(ast_var_full_name(current
), ast_var_value(current
));
3286 AST_LIST_INSERT_TAIL(&child
->varshead
, newvar
, entries
);
3288 ast_log(LOG_DEBUG
, "Copying hard-transferable variable %s.\n", ast_var_name(newvar
));
3293 ast_log(LOG_DEBUG
, "Not copying variable %s.\n", ast_var_name(current
));
3300 \brief Clone channel variables from 'clone' channel into 'original' channel
3302 All variables except those related to app_groupcount are cloned.
3303 Variables are actually _removed_ from 'clone' channel, presumably
3304 because it will subsequently be destroyed.
3306 \note Assumes locks will be in place on both channels when called.
3308 static void clone_variables(struct ast_channel
*original
, struct ast_channel
*clone
)
3310 struct ast_var_t
*current
, *newvar
;
3311 /* Append variables from clone channel into original channel */
3312 /* XXX Is this always correct? We have to in order to keep MACROS working XXX */
3313 if (AST_LIST_FIRST(&clone
->varshead
))
3314 AST_LIST_APPEND_LIST(&original
->varshead
, &clone
->varshead
, entries
);
3316 /* then, dup the varshead list into the clone */
3318 AST_LIST_TRAVERSE(&original
->varshead
, current
, entries
) {
3319 newvar
= ast_var_assign(current
->name
, current
->value
);
3321 AST_LIST_INSERT_TAIL(&clone
->varshead
, newvar
, entries
);
3326 \brief Masquerade a channel
3328 \note Assumes channel will be locked when called
3330 int ast_do_masquerade(struct ast_channel
*original
)
3335 struct ast_frame
*cur
;
3336 const struct ast_channel_tech
*t
;
3338 struct ast_callerid tmpcid
;
3339 struct ast_channel
*clone
= original
->masq
;
3340 struct ast_cdr
*cdr
;
3341 int rformat
= original
->readformat
;
3342 int wformat
= original
->writeformat
;
3348 if (option_debug
> 3)
3349 ast_log(LOG_DEBUG
, "Actually Masquerading %s(%d) into the structure of %s(%d)\n",
3350 clone
->name
, clone
->_state
, original
->name
, original
->_state
);
3352 /* XXX This is a seriously wacked out operation. We're essentially putting the guts of
3353 the clone channel into the original channel. Start by killing off the original
3354 channel's backend. I'm not sure we're going to keep this function, because
3355 while the features are nice, the cost is very high in terms of pure nastiness. XXX */
3357 /* We need the clone's lock, too */
3358 ast_channel_lock(clone
);
3360 if (option_debug
> 1)
3361 ast_log(LOG_DEBUG
, "Got clone lock for masquerade on '%s' at %p\n", clone
->name
, &clone
->lock
);
3363 /* Having remembered the original read/write formats, we turn off any translation on either
3365 free_translation(clone
);
3366 free_translation(original
);
3369 /* Unlink the masquerade */
3370 original
->masq
= NULL
;
3371 clone
->masqr
= NULL
;
3373 /* Save the original name */
3374 ast_copy_string(orig
, original
->name
, sizeof(orig
));
3375 /* Save the new name */
3376 ast_copy_string(newn
, clone
->name
, sizeof(newn
));
3377 /* Create the masq name */
3378 snprintf(masqn
, sizeof(masqn
), "%s<MASQ>", newn
);
3380 /* Copy the name from the clone channel */
3381 ast_string_field_set(original
, name
, newn
);
3383 /* Mangle the name of the clone channel */
3384 ast_string_field_set(clone
, name
, masqn
);
3386 /* Notify any managers of the change, first the masq then the other */
3387 manager_event(EVENT_FLAG_CALL
, "Rename", "Oldname: %s\r\nNewname: %s\r\nUniqueid: %s\r\n", newn
, masqn
, clone
->uniqueid
);
3388 manager_event(EVENT_FLAG_CALL
, "Rename", "Oldname: %s\r\nNewname: %s\r\nUniqueid: %s\r\n", orig
, newn
, original
->uniqueid
);
3390 /* Swap the technologies */
3392 original
->tech
= clone
->tech
;
3396 cdr
= original
->cdr
;
3397 original
->cdr
= clone
->cdr
;
3400 t_pvt
= original
->tech_pvt
;
3401 original
->tech_pvt
= clone
->tech_pvt
;
3402 clone
->tech_pvt
= t_pvt
;
3404 /* Swap the alertpipes */
3405 for (i
= 0; i
< 2; i
++) {
3406 x
= original
->alertpipe
[i
];
3407 original
->alertpipe
[i
] = clone
->alertpipe
[i
];
3408 clone
->alertpipe
[i
] = x
;
3412 * Swap the readq's. The end result should be this:
3414 * 1) All frames should be on the new (original) channel.
3415 * 2) Any frames that were already on the new channel before this
3416 * masquerade need to be at the end of the readq, after all of the
3417 * frames on the old (clone) channel.
3418 * 3) The alertpipe needs to get poked for every frame that was already
3419 * on the new channel, since we are now using the alert pipe from the
3420 * old (clone) channel.
3423 AST_LIST_HEAD_NOLOCK(, ast_frame
) tmp_readq
;
3424 AST_LIST_HEAD_SET_NOLOCK(&tmp_readq
, NULL
);
3426 AST_LIST_APPEND_LIST(&tmp_readq
, &original
->readq
, frame_list
);
3427 AST_LIST_APPEND_LIST(&original
->readq
, &clone
->readq
, frame_list
);
3429 while ((cur
= AST_LIST_REMOVE_HEAD(&tmp_readq
, frame_list
))) {
3430 AST_LIST_INSERT_TAIL(&original
->readq
, cur
, frame_list
);
3431 if (original
->alertpipe
[1] > -1) {
3433 write(original
->alertpipe
[1], &poke
, sizeof(poke
));
3438 /* Swap the raw formats */
3439 x
= original
->rawreadformat
;
3440 original
->rawreadformat
= clone
->rawreadformat
;
3441 clone
->rawreadformat
= x
;
3442 x
= original
->rawwriteformat
;
3443 original
->rawwriteformat
= clone
->rawwriteformat
;
3444 clone
->rawwriteformat
= x
;
3446 clone
->_softhangup
= AST_SOFTHANGUP_DEV
;
3448 /* And of course, so does our current state. Note we need not
3449 call ast_setstate since the event manager doesn't really consider
3450 these separate. We do this early so that the clone has the proper
3451 state of the original channel. */
3452 origstate
= original
->_state
;
3453 original
->_state
= clone
->_state
;
3454 clone
->_state
= origstate
;
3456 if (clone
->tech
->fixup
){
3457 res
= clone
->tech
->fixup(original
, clone
);
3459 ast_log(LOG_WARNING
, "Fixup failed on channel %s, strange things may happen.\n", clone
->name
);
3462 /* Start by disconnecting the original's physical side */
3463 if (clone
->tech
->hangup
)
3464 res
= clone
->tech
->hangup(clone
);
3466 ast_log(LOG_WARNING
, "Hangup failed! Strange things may happen!\n");
3467 ast_channel_unlock(clone
);
3471 snprintf(zombn
, sizeof(zombn
), "%s<ZOMBIE>", orig
);
3472 /* Mangle the name of the clone channel */
3473 ast_string_field_set(clone
, name
, zombn
);
3474 manager_event(EVENT_FLAG_CALL
, "Rename", "Oldname: %s\r\nNewname: %s\r\nUniqueid: %s\r\n", masqn
, zombn
, clone
->uniqueid
);
3476 /* Update the type. */
3477 t_pvt
= original
->monitor
;
3478 original
->monitor
= clone
->monitor
;
3479 clone
->monitor
= t_pvt
;
3481 /* Keep the same language. */
3482 ast_string_field_set(original
, language
, clone
->language
);
3483 /* Copy the FD's other than the generator fd */
3484 for (x
= 0; x
< AST_MAX_FDS
; x
++) {
3485 if (x
!= AST_GENERATOR_FD
)
3486 original
->fds
[x
] = clone
->fds
[x
];
3489 ast_app_group_update(clone
, original
);
3490 /* Move data stores over */
3491 if (AST_LIST_FIRST(&clone
->datastores
))
3492 AST_LIST_APPEND_LIST(&original
->datastores
, &clone
->datastores
, entry
);
3494 clone_variables(original
, clone
);
3495 /* Presense of ADSI capable CPE follows clone */
3496 original
->adsicpe
= clone
->adsicpe
;
3497 /* Bridge remains the same */
3498 /* CDR fields remain the same */
3499 /* XXX What about blocking, softhangup, blocker, and lock and blockproc? XXX */
3500 /* Application and data remain the same */
3501 /* Clone exception becomes real one, as with fdno */
3502 ast_copy_flags(original
, clone
, AST_FLAG_EXCEPTION
);
3503 original
->fdno
= clone
->fdno
;
3504 /* Schedule context remains the same */
3505 /* Stream stuff stays the same */
3506 /* Keep the original state. The fixup code will need to work with it most likely */
3508 /* Just swap the whole structures, nevermind the allocations, they'll work themselves
3510 tmpcid
= original
->cid
;
3511 original
->cid
= clone
->cid
;
3512 clone
->cid
= tmpcid
;
3514 /* Restore original timing file descriptor */
3515 original
->fds
[AST_TIMING_FD
] = original
->timingfd
;
3517 /* Our native formats are different now */
3518 original
->nativeformats
= clone
->nativeformats
;
3520 /* Context, extension, priority, app data, jump table, remain the same */
3521 /* pvt switches. pbx stays the same, as does next */
3523 /* Set the write format */
3524 ast_set_write_format(original
, wformat
);
3526 /* Set the read format */
3527 ast_set_read_format(original
, rformat
);
3529 /* Copy the music class */
3530 ast_string_field_set(original
, musicclass
, clone
->musicclass
);
3533 ast_log(LOG_DEBUG
, "Putting channel %s in %d/%d formats\n", original
->name
, wformat
, rformat
);
3535 /* Okay. Last thing is to let the channel driver know about all this mess, so he
3536 can fix up everything as best as possible */
3537 if (original
->tech
->fixup
) {
3538 res
= original
->tech
->fixup(clone
, original
);
3540 ast_log(LOG_WARNING
, "Channel for type '%s' could not fixup channel %s\n",
3541 original
->tech
->type
, original
->name
);
3542 ast_channel_unlock(clone
);
3546 ast_log(LOG_WARNING
, "Channel type '%s' does not have a fixup routine (for %s)! Bad things may happen.\n",
3547 original
->tech
->type
, original
->name
);
3549 /* If an indication is currently playing maintain it on the channel that is taking the place of original */
3550 if (original
->visible_indication
)
3551 ast_indicate(original
, original
->visible_indication
);
3553 /* Now, at this point, the "clone" channel is totally F'd up. We mark it as
3554 a zombie so nothing tries to touch it. If it's already been marked as a
3555 zombie, then free it now (since it already is considered invalid). */
3556 if (ast_test_flag(clone
, AST_FLAG_ZOMBIE
)) {
3558 ast_log(LOG_DEBUG
, "Destroying channel clone '%s'\n", clone
->name
);
3559 ast_channel_unlock(clone
);
3560 manager_event(EVENT_FLAG_CALL
, "Hangup",
3564 "Cause-txt: %s\r\n",
3568 ast_cause2str(clone
->hangupcause
)
3570 ast_channel_free(clone
);
3573 ast_log(LOG_DEBUG
, "Released clone lock on '%s'\n", clone
->name
);
3574 ast_set_flag(clone
, AST_FLAG_ZOMBIE
);
3575 ast_queue_frame(clone
, &ast_null_frame
);
3576 ast_channel_unlock(clone
);
3579 /* Signal any blocker */
3580 if (ast_test_flag(original
, AST_FLAG_BLOCKING
))
3581 pthread_kill(original
->blocker
, SIGURG
);
3583 ast_log(LOG_DEBUG
, "Done Masquerading %s (%d)\n", original
->name
, original
->_state
);
3587 void ast_set_callerid(struct ast_channel
*chan
, const char *callerid
, const char *calleridname
, const char *ani
)
3589 ast_channel_lock(chan
);
3592 if (chan
->cid
.cid_num
)
3593 free(chan
->cid
.cid_num
);
3594 chan
->cid
.cid_num
= ast_strdup(callerid
);
3597 if (chan
->cid
.cid_name
)
3598 free(chan
->cid
.cid_name
);
3599 chan
->cid
.cid_name
= ast_strdup(calleridname
);
3602 if (chan
->cid
.cid_ani
)
3603 free(chan
->cid
.cid_ani
);
3604 chan
->cid
.cid_ani
= ast_strdup(ani
);
3607 ast_cdr_setcid(chan
->cdr
, chan
);
3608 manager_event(EVENT_FLAG_CALL
, "Newcallerid",
3611 "CallerIDName: %s\r\n"
3613 "CID-CallingPres: %d (%s)\r\n",
3615 S_OR(chan
->cid
.cid_num
, "<Unknown>"),
3616 S_OR(chan
->cid
.cid_name
, "<Unknown>"),
3619 ast_describe_caller_presentation(chan
->cid
.cid_pres
)
3622 ast_channel_unlock(chan
);
3625 int ast_setstate(struct ast_channel
*chan
, enum ast_channel_state state
)
3627 int oldstate
= chan
->_state
;
3629 if (oldstate
== state
)
3632 chan
->_state
= state
;
3633 ast_device_state_changed_literal(chan
->name
);
3634 /* setstate used to conditionally report Newchannel; this is no more */
3635 manager_event(EVENT_FLAG_CALL
,
3640 "CallerIDName: %s\r\n"
3642 chan
->name
, ast_state2str(chan
->_state
),
3643 S_OR(chan
->cid
.cid_num
, "<unknown>"),
3644 S_OR(chan
->cid
.cid_name
, "<unknown>"),
3650 /*! \brief Find bridged channel */
3651 struct ast_channel
*ast_bridged_channel(struct ast_channel
*chan
)
3653 struct ast_channel
*bridged
;
3654 bridged
= chan
->_bridge
;
3655 if (bridged
&& bridged
->tech
->bridged_channel
)
3656 bridged
= bridged
->tech
->bridged_channel(chan
, bridged
);
3660 static void bridge_playfile(struct ast_channel
*chan
, struct ast_channel
*peer
, const char *sound
, int remain
)
3662 int min
= 0, sec
= 0, check
;
3664 check
= ast_autoservice_start(peer
);
3669 if (remain
/ 60 > 1) {
3677 if (!strcmp(sound
,"timeleft")) { /* Queue support */
3678 ast_stream_and_wait(chan
, "vm-youhave", chan
->language
, "");
3680 ast_say_number(chan
, min
, AST_DIGIT_ANY
, chan
->language
, NULL
);
3681 ast_stream_and_wait(chan
, "queue-minutes", chan
->language
, "");
3684 ast_say_number(chan
, sec
, AST_DIGIT_ANY
, chan
->language
, NULL
);
3685 ast_stream_and_wait(chan
, "queue-seconds", chan
->language
, "");
3688 ast_stream_and_wait(chan
, sound
, chan
->language
, "");
3691 ast_autoservice_stop(peer
);
3694 static enum ast_bridge_result
ast_generic_bridge(struct ast_channel
*c0
, struct ast_channel
*c1
,
3695 struct ast_bridge_config
*config
, struct ast_frame
**fo
,
3696 struct ast_channel
**rc
, struct timeval bridge_end
)
3698 /* Copy voice back and forth between the two channels. */
3699 struct ast_channel
*cs
[3];
3700 struct ast_frame
*f
;
3701 enum ast_bridge_result res
= AST_BRIDGE_COMPLETE
;
3702 int o0nativeformats
;
3703 int o1nativeformats
;
3707 /* Indicates whether a frame was queued into a jitterbuffer */
3708 int frame_put_in_jb
= 0;
3714 pvt0
= c0
->tech_pvt
;
3715 pvt1
= c1
->tech_pvt
;
3716 o0nativeformats
= c0
->nativeformats
;
3717 o1nativeformats
= c1
->nativeformats
;
3718 watch_c0_dtmf
= config
->flags
& AST_BRIDGE_DTMF_CHANNEL_0
;
3719 watch_c1_dtmf
= config
->flags
& AST_BRIDGE_DTMF_CHANNEL_1
;
3721 /* Check the need of a jitterbuffer for each channel */
3722 jb_in_use
= ast_jb_do_usecheck(c0
, c1
);
3725 struct ast_channel
*who
, *other
;
3727 if ((c0
->tech_pvt
!= pvt0
) || (c1
->tech_pvt
!= pvt1
) ||
3728 (o0nativeformats
!= c0
->nativeformats
) ||
3729 (o1nativeformats
!= c1
->nativeformats
)) {
3730 /* Check for Masquerade, codec changes, etc */
3731 res
= AST_BRIDGE_RETRY
;
3734 if (bridge_end
.tv_sec
) {
3735 to
= ast_tvdiff_ms(bridge_end
, ast_tvnow());
3737 if (config
->timelimit
)
3738 res
= AST_BRIDGE_RETRY
;
3740 res
= AST_BRIDGE_COMPLETE
;
3745 /* Calculate the appropriate max sleep interval - in general, this is the time,
3746 left to the closest jb delivery moment */
3748 to
= ast_jb_get_when_to_wakeup(c0
, c1
, to
);
3749 who
= ast_waitfor_n(cs
, 2, &to
);
3751 /* No frame received within the specified timeout - check if we have to deliver now */
3753 ast_jb_get_and_deliver(c0
, c1
);
3754 if (c0
->_softhangup
== AST_SOFTHANGUP_UNBRIDGE
|| c1
->_softhangup
== AST_SOFTHANGUP_UNBRIDGE
) {
3755 if (c0
->_softhangup
== AST_SOFTHANGUP_UNBRIDGE
)
3756 c0
->_softhangup
= 0;
3757 if (c1
->_softhangup
== AST_SOFTHANGUP_UNBRIDGE
)
3758 c1
->_softhangup
= 0;
3769 ast_log(LOG_DEBUG
, "Didn't get a frame from channel: %s\n",who
->name
);
3773 other
= (who
== c0
) ? c1
: c0
; /* the 'other' channel */
3774 /* Try add the frame info the who's bridged channel jitterbuff */
3776 frame_put_in_jb
= !ast_jb_put(other
, f
);
3778 if ((f
->frametype
== AST_FRAME_CONTROL
) && !(config
->flags
& AST_BRIDGE_IGNORE_SIGS
)) {
3779 int bridge_exit
= 0;
3781 switch (f
->subclass
) {
3782 case AST_CONTROL_HOLD
:
3783 case AST_CONTROL_UNHOLD
:
3784 case AST_CONTROL_VIDUPDATE
:
3785 case AST_CONTROL_SRCUPDATE
:
3786 ast_indicate_data(other
, f
->subclass
, f
->data
, f
->datalen
);
3793 ast_log(LOG_DEBUG
, "Got a FRAME_CONTROL (%d) frame on channel %s\n", f
->subclass
, who
->name
);
3799 if ((f
->frametype
== AST_FRAME_VOICE
) ||
3800 (f
->frametype
== AST_FRAME_DTMF_BEGIN
) ||
3801 (f
->frametype
== AST_FRAME_DTMF
) ||
3802 (f
->frametype
== AST_FRAME_VIDEO
) ||
3803 (f
->frametype
== AST_FRAME_IMAGE
) ||
3804 (f
->frametype
== AST_FRAME_HTML
) ||
3805 (f
->frametype
== AST_FRAME_MODEM
) ||
3806 (f
->frametype
== AST_FRAME_TEXT
)) {
3807 /* monitored dtmf causes exit from bridge */
3808 int monitored_source
= (who
== c0
) ? watch_c0_dtmf
: watch_c1_dtmf
;
3810 if (monitored_source
&&
3811 (f
->frametype
== AST_FRAME_DTMF_END
||
3812 f
->frametype
== AST_FRAME_DTMF_BEGIN
)) {
3816 ast_log(LOG_DEBUG
, "Got DTMF %s on channel (%s)\n",
3817 f
->frametype
== AST_FRAME_DTMF_END
? "end" : "begin",
3821 /* Write immediately frames, not passed through jb */
3822 if (!frame_put_in_jb
)
3823 ast_write(other
, f
);
3825 /* Check if we have to deliver now */
3827 ast_jb_get_and_deliver(c0
, c1
);
3829 /* XXX do we want to pass on also frames not matched above ? */
3832 /* Swap who gets priority */
3840 /*! \brief Bridge two channels together */
3841 enum ast_bridge_result
ast_channel_bridge(struct ast_channel
*c0
, struct ast_channel
*c1
,
3842 struct ast_bridge_config
*config
, struct ast_frame
**fo
, struct ast_channel
**rc
)
3844 struct ast_channel
*who
= NULL
;
3845 enum ast_bridge_result res
= AST_BRIDGE_COMPLETE
;
3848 int o0nativeformats
;
3849 int o1nativeformats
;
3850 long time_left_ms
=0;
3851 struct timeval nexteventts
= { 0, };
3852 char caller_warning
= 0;
3853 char callee_warning
= 0;
3856 ast_log(LOG_WARNING
, "%s is already in a bridge with %s\n",
3857 c0
->name
, c0
->_bridge
->name
);
3861 ast_log(LOG_WARNING
, "%s is already in a bridge with %s\n",
3862 c1
->name
, c1
->_bridge
->name
);
3866 /* Stop if we're a zombie or need a soft hangup */
3867 if (ast_test_flag(c0
, AST_FLAG_ZOMBIE
) || ast_check_hangup_locked(c0
) ||
3868 ast_test_flag(c1
, AST_FLAG_ZOMBIE
) || ast_check_hangup_locked(c1
))
3872 firstpass
= config
->firstpass
;
3873 config
->firstpass
= 0;
3875 if (ast_tvzero(config
->start_time
))
3876 config
->start_time
= ast_tvnow();
3877 time_left_ms
= config
->timelimit
;
3879 caller_warning
= ast_test_flag(&config
->features_caller
, AST_FEATURE_PLAY_WARNING
);
3880 callee_warning
= ast_test_flag(&config
->features_callee
, AST_FEATURE_PLAY_WARNING
);
3882 if (config
->start_sound
&& firstpass
) {
3884 bridge_playfile(c0
, c1
, config
->start_sound
, time_left_ms
/ 1000);
3886 bridge_playfile(c1
, c0
, config
->start_sound
, time_left_ms
/ 1000);
3889 /* Keep track of bridge */
3893 /* \todo XXX here should check that cid_num is not NULL */
3894 manager_event(EVENT_FLAG_CALL
, "Link",
3900 "CallerID2: %s\r\n",
3901 c0
->name
, c1
->name
, c0
->uniqueid
, c1
->uniqueid
, c0
->cid
.cid_num
, c1
->cid
.cid_num
);
3903 o0nativeformats
= c0
->nativeformats
;
3904 o1nativeformats
= c1
->nativeformats
;
3906 if (config
->feature_timer
) {
3907 nexteventts
= ast_tvadd(config
->start_time
, ast_samp2tv(config
->feature_timer
, 1000));
3908 } else if (config
->timelimit
) {
3909 nexteventts
= ast_tvadd(config
->start_time
, ast_samp2tv(config
->timelimit
, 1000));
3910 if (caller_warning
|| callee_warning
)
3911 nexteventts
= ast_tvsub(nexteventts
, ast_samp2tv(config
->play_warning
, 1000));
3914 if (!c0
->tech
->send_digit_begin
)
3915 ast_set_flag(c1
, AST_FLAG_END_DTMF_ONLY
);
3916 if (!c1
->tech
->send_digit_begin
)
3917 ast_set_flag(c0
, AST_FLAG_END_DTMF_ONLY
);
3919 /* Before we enter in and bridge these two together tell them both the source of audio has changed */
3920 ast_indicate(c0
, AST_CONTROL_SRCUPDATE
);
3921 ast_indicate(c1
, AST_CONTROL_SRCUPDATE
);
3923 for (/* ever */;;) {
3924 struct timeval now
= { 0, };
3929 if (!ast_tvzero(nexteventts
)) {
3931 to
= ast_tvdiff_ms(nexteventts
, now
);
3933 if (!config
->timelimit
) {
3934 res
= AST_BRIDGE_COMPLETE
;
3941 if (config
->timelimit
) {
3942 time_left_ms
= config
->timelimit
- ast_tvdiff_ms(now
, config
->start_time
);
3943 if (time_left_ms
< to
)
3946 if (time_left_ms
<= 0) {
3947 if (caller_warning
&& config
->end_sound
)
3948 bridge_playfile(c0
, c1
, config
->end_sound
, 0);
3949 if (callee_warning
&& config
->end_sound
)
3950 bridge_playfile(c1
, c0
, config
->end_sound
, 0);
3959 if (time_left_ms
>= 5000 && config
->warning_sound
&& config
->play_warning
) {
3960 int t
= (time_left_ms
+ 500) / 1000; /* round to nearest second */
3962 bridge_playfile(c0
, c1
, config
->warning_sound
, t
);
3964 bridge_playfile(c1
, c0
, config
->warning_sound
, t
);
3966 if (config
->warning_freq
&& (time_left_ms
> (config
->warning_freq
+ 5000)))
3967 nexteventts
= ast_tvadd(nexteventts
, ast_samp2tv(config
->warning_freq
, 1000));
3969 nexteventts
= ast_tvadd(config
->start_time
, ast_samp2tv(config
->timelimit
, 1000));
3973 if (c0
->_softhangup
== AST_SOFTHANGUP_UNBRIDGE
|| c1
->_softhangup
== AST_SOFTHANGUP_UNBRIDGE
) {
3974 if (c0
->_softhangup
== AST_SOFTHANGUP_UNBRIDGE
)
3975 c0
->_softhangup
= 0;
3976 if (c1
->_softhangup
== AST_SOFTHANGUP_UNBRIDGE
)
3977 c1
->_softhangup
= 0;
3981 ast_log(LOG_DEBUG
, "Unbridge signal received. Ending native bridge.\n");
3985 /* Stop if we're a zombie or need a soft hangup */
3986 if (ast_test_flag(c0
, AST_FLAG_ZOMBIE
) || ast_check_hangup_locked(c0
) ||
3987 ast_test_flag(c1
, AST_FLAG_ZOMBIE
) || ast_check_hangup_locked(c1
)) {
3993 ast_log(LOG_DEBUG
, "Bridge stops because we're zombie or need a soft hangup: c0=%s, c1=%s, flags: %s,%s,%s,%s\n",
3995 ast_test_flag(c0
, AST_FLAG_ZOMBIE
) ? "Yes" : "No",
3996 ast_check_hangup(c0
) ? "Yes" : "No",
3997 ast_test_flag(c1
, AST_FLAG_ZOMBIE
) ? "Yes" : "No",
3998 ast_check_hangup(c1
) ? "Yes" : "No");
4002 /* See if the BRIDGEPEER variable needs to be updated */
4003 if (!ast_strlen_zero(pbx_builtin_getvar_helper(c0
, "BRIDGEPEER")))
4004 pbx_builtin_setvar_helper(c0
, "BRIDGEPEER", c1
->name
);
4005 if (!ast_strlen_zero(pbx_builtin_getvar_helper(c1
, "BRIDGEPEER")))
4006 pbx_builtin_setvar_helper(c1
, "BRIDGEPEER", c0
->name
);
4008 if (c0
->tech
->bridge
&&
4009 (config
->timelimit
== 0) &&
4010 (c0
->tech
->bridge
== c1
->tech
->bridge
) &&
4011 !nativefailed
&& !c0
->monitor
&& !c1
->monitor
&&
4012 !c0
->audiohooks
&& !c1
->audiohooks
&& !ast_test_flag(&(config
->features_callee
),AST_FEATURE_REDIRECT
) &&
4013 !ast_test_flag(&(config
->features_caller
),AST_FEATURE_REDIRECT
) &&
4014 !c0
->masq
&& !c0
->masqr
&& !c1
->masq
&& !c1
->masqr
) {
4015 /* Looks like they share a bridge method and nothing else is in the way */
4016 ast_set_flag(c0
, AST_FLAG_NBRIDGE
);
4017 ast_set_flag(c1
, AST_FLAG_NBRIDGE
);
4018 if ((res
= c0
->tech
->bridge(c0
, c1
, config
->flags
, fo
, rc
, to
)) == AST_BRIDGE_COMPLETE
) {
4019 /* \todo XXX here should check that cid_num is not NULL */
4020 manager_event(EVENT_FLAG_CALL
, "Unlink",
4026 "CallerID2: %s\r\n",
4027 c0
->name
, c1
->name
, c0
->uniqueid
, c1
->uniqueid
, c0
->cid
.cid_num
, c1
->cid
.cid_num
);
4029 ast_log(LOG_DEBUG
, "Returning from native bridge, channels: %s, %s\n", c0
->name
, c1
->name
);
4031 ast_clear_flag(c0
, AST_FLAG_NBRIDGE
);
4032 ast_clear_flag(c1
, AST_FLAG_NBRIDGE
);
4034 if (c0
->_softhangup
== AST_SOFTHANGUP_UNBRIDGE
|| c1
->_softhangup
== AST_SOFTHANGUP_UNBRIDGE
)
4042 ast_clear_flag(c0
, AST_FLAG_NBRIDGE
);
4043 ast_clear_flag(c1
, AST_FLAG_NBRIDGE
);
4046 case AST_BRIDGE_RETRY
:
4049 if (option_verbose
> 2)
4050 ast_verbose(VERBOSE_PREFIX_3
"Native bridging %s and %s ended\n",
4051 c0
->name
, c1
->name
);
4053 case AST_BRIDGE_FAILED_NOWARN
:
4059 if (((c0
->writeformat
!= c1
->readformat
) || (c0
->readformat
!= c1
->writeformat
) ||
4060 (c0
->nativeformats
!= o0nativeformats
) || (c1
->nativeformats
!= o1nativeformats
)) &&
4061 !(c0
->generator
|| c1
->generator
)) {
4062 if (ast_channel_make_compatible(c0
, c1
)) {
4063 ast_log(LOG_WARNING
, "Can't make %s and %s compatible\n", c0
->name
, c1
->name
);
4064 /* \todo XXX here should check that cid_num is not NULL */
4065 manager_event(EVENT_FLAG_CALL
, "Unlink",
4071 "CallerID2: %s\r\n",
4072 c0
->name
, c1
->name
, c0
->uniqueid
, c1
->uniqueid
, c0
->cid
.cid_num
, c1
->cid
.cid_num
);
4073 return AST_BRIDGE_FAILED
;
4075 o0nativeformats
= c0
->nativeformats
;
4076 o1nativeformats
= c1
->nativeformats
;
4078 res
= ast_generic_bridge(c0
, c1
, config
, fo
, rc
, nexteventts
);
4079 if (res
!= AST_BRIDGE_RETRY
)
4083 ast_clear_flag(c0
, AST_FLAG_END_DTMF_ONLY
);
4084 ast_clear_flag(c1
, AST_FLAG_END_DTMF_ONLY
);
4086 /* Now that we have broken the bridge the source will change yet again */
4087 ast_indicate(c0
, AST_CONTROL_SRCUPDATE
);
4088 ast_indicate(c1
, AST_CONTROL_SRCUPDATE
);
4093 /* \todo XXX here should check that cid_num is not NULL */
4094 manager_event(EVENT_FLAG_CALL
, "Unlink",
4100 "CallerID2: %s\r\n",
4101 c0
->name
, c1
->name
, c0
->uniqueid
, c1
->uniqueid
, c0
->cid
.cid_num
, c1
->cid
.cid_num
);
4103 ast_log(LOG_DEBUG
, "Bridge stops bridging channels %s and %s\n", c0
->name
, c1
->name
);
4108 /*! \brief Sets an option on a channel */
4109 int ast_channel_setoption(struct ast_channel
*chan
, int option
, void *data
, int datalen
, int block
)
4113 if (chan
->tech
->setoption
) {
4114 res
= chan
->tech
->setoption(chan
, option
, data
, datalen
);
4122 /* XXX Implement blocking -- just wait for our option frame reply, discarding
4123 intermediate packets. XXX */
4124 ast_log(LOG_ERROR
, "XXX Blocking not implemented yet XXX\n");
4130 struct tonepair_def
{
4137 struct tonepair_state
{
4151 unsigned char offset
[AST_FRIENDLY_OFFSET
];
4155 static void tonepair_release(struct ast_channel
*chan
, void *params
)
4157 struct tonepair_state
*ts
= params
;
4160 ast_set_write_format(chan
, ts
->origwfmt
);
4164 static void *tonepair_alloc(struct ast_channel
*chan
, void *params
)
4166 struct tonepair_state
*ts
;
4167 struct tonepair_def
*td
= params
;
4169 if (!(ts
= ast_calloc(1, sizeof(*ts
))))
4171 ts
->origwfmt
= chan
->writeformat
;
4172 if (ast_set_write_format(chan
, AST_FORMAT_SLINEAR
)) {
4173 ast_log(LOG_WARNING
, "Unable to set '%s' to signed linear format (write)\n", chan
->name
);
4174 tonepair_release(NULL
, ts
);
4177 ts
->fac1
= 2.0 * cos(2.0 * M_PI
* (td
->freq1
/ 8000.0)) * 32768.0;
4179 ts
->v2_1
= sin(-4.0 * M_PI
* (td
->freq1
/ 8000.0)) * td
->vol
;
4180 ts
->v3_1
= sin(-2.0 * M_PI
* (td
->freq1
/ 8000.0)) * td
->vol
;
4182 ts
->fac2
= 2.0 * cos(2.0 * M_PI
* (td
->freq2
/ 8000.0)) * 32768.0;
4183 ts
->v2_2
= sin(-4.0 * M_PI
* (td
->freq2
/ 8000.0)) * td
->vol
;
4184 ts
->v3_2
= sin(-2.0 * M_PI
* (td
->freq2
/ 8000.0)) * td
->vol
;
4185 ts
->duration
= td
->duration
;
4188 /* Let interrupts interrupt :) */
4189 ast_set_flag(chan
, AST_FLAG_WRITE_INT
);
4193 static int tonepair_generator(struct ast_channel
*chan
, void *data
, int len
, int samples
)
4195 struct tonepair_state
*ts
= data
;
4198 /* we need to prepare a frame with 16 * timelen samples as we're
4199 * generating SLIN audio
4203 if (len
> sizeof(ts
->data
) / 2 - 1) {
4204 ast_log(LOG_WARNING
, "Can't generate that much data!\n");
4207 memset(&ts
->f
, 0, sizeof(ts
->f
));
4208 for (x
=0;x
<len
/2;x
++) {
4209 ts
->v1_1
= ts
->v2_1
;
4210 ts
->v2_1
= ts
->v3_1
;
4211 ts
->v3_1
= (ts
->fac1
* ts
->v2_1
>> 15) - ts
->v1_1
;
4213 ts
->v1_2
= ts
->v2_2
;
4214 ts
->v2_2
= ts
->v3_2
;
4215 ts
->v3_2
= (ts
->fac2
* ts
->v2_2
>> 15) - ts
->v1_2
;
4218 p
= ts
->v3_2
- 32768;
4220 p
= ((p
* 9) / 10) + 1;
4221 ts
->data
[x
] = (ts
->v3_1
* p
) >> 15;
4223 ts
->data
[x
] = ts
->v3_1
+ ts
->v3_2
;
4225 ts
->f
.frametype
= AST_FRAME_VOICE
;
4226 ts
->f
.subclass
= AST_FORMAT_SLINEAR
;
4227 ts
->f
.datalen
= len
;
4228 ts
->f
.samples
= samples
;
4229 ts
->f
.offset
= AST_FRIENDLY_OFFSET
;
4230 ts
->f
.data
= ts
->data
;
4231 ast_write(chan
, &ts
->f
);
4233 if (ts
->duration
> 0) {
4234 if (ts
->pos
>= ts
->duration
* 8)
4240 static struct ast_generator tonepair
= {
4241 alloc
: tonepair_alloc
,
4242 release
: tonepair_release
,
4243 generate
: tonepair_generator
,
4246 int ast_tonepair_start(struct ast_channel
*chan
, int freq1
, int freq2
, int duration
, int vol
)
4248 struct tonepair_def d
= { 0, };
4252 d
.duration
= duration
;
4253 d
.vol
= (vol
< 1) ? 8192 : vol
; /* force invalid to 8192 */
4254 if (ast_activate_generator(chan
, &tonepair
, &d
))
4259 void ast_tonepair_stop(struct ast_channel
*chan
)
4261 ast_deactivate_generator(chan
);
4264 int ast_tonepair(struct ast_channel
*chan
, int freq1
, int freq2
, int duration
, int vol
)
4268 if ((res
= ast_tonepair_start(chan
, freq1
, freq2
, duration
, vol
)))
4271 /* Give us some wiggle room */
4272 while (chan
->generatordata
&& ast_waitfor(chan
, 100) >= 0) {
4273 struct ast_frame
*f
= ast_read(chan
);
4282 ast_group_t
ast_get_group(const char *s
)
4286 int start
=0, finish
=0, x
;
4287 ast_group_t group
= 0;
4289 if (ast_strlen_zero(s
))
4294 while ((piece
= strsep(&c
, ","))) {
4295 if (sscanf(piece
, "%d-%d", &start
, &finish
) == 2) {
4297 } else if (sscanf(piece
, "%d", &start
)) {
4301 ast_log(LOG_ERROR
, "Syntax error parsing group configuration '%s' at '%s'. Ignoring.\n", s
, piece
);
4304 for (x
= start
; x
<= finish
; x
++) {
4305 if ((x
> 63) || (x
< 0)) {
4306 ast_log(LOG_WARNING
, "Ignoring invalid group %d (maximum group is 63)\n", x
);
4308 group
|= ((ast_group_t
) 1 << x
);
4314 static int (*ast_moh_start_ptr
)(struct ast_channel
*, const char *, const char *) = NULL
;
4315 static void (*ast_moh_stop_ptr
)(struct ast_channel
*) = NULL
;
4316 static void (*ast_moh_cleanup_ptr
)(struct ast_channel
*) = NULL
;
4318 void ast_install_music_functions(int (*start_ptr
)(struct ast_channel
*, const char *, const char *),
4319 void (*stop_ptr
)(struct ast_channel
*),
4320 void (*cleanup_ptr
)(struct ast_channel
*))
4322 ast_moh_start_ptr
= start_ptr
;
4323 ast_moh_stop_ptr
= stop_ptr
;
4324 ast_moh_cleanup_ptr
= cleanup_ptr
;
4327 void ast_uninstall_music_functions(void)
4329 ast_moh_start_ptr
= NULL
;
4330 ast_moh_stop_ptr
= NULL
;
4331 ast_moh_cleanup_ptr
= NULL
;
4334 /*! \brief Turn on music on hold on a given channel */
4335 int ast_moh_start(struct ast_channel
*chan
, const char *mclass
, const char *interpclass
)
4337 if (ast_moh_start_ptr
)
4338 return ast_moh_start_ptr(chan
, mclass
, interpclass
);
4340 if (option_verbose
> 2) {
4341 ast_verbose(VERBOSE_PREFIX_3
"Music class %s requested but no musiconhold loaded.\n",
4342 mclass
? mclass
: (interpclass
? interpclass
: "default"));
4348 /*! \brief Turn off music on hold on a given channel */
4349 void ast_moh_stop(struct ast_channel
*chan
)
4351 if (ast_moh_stop_ptr
)
4352 ast_moh_stop_ptr(chan
);
4355 void ast_moh_cleanup(struct ast_channel
*chan
)
4357 if (ast_moh_cleanup_ptr
)
4358 ast_moh_cleanup_ptr(chan
);
4361 void ast_channels_init(void)
4363 ast_cli_register_multiple(cli_channel
, sizeof(cli_channel
) / sizeof(struct ast_cli_entry
));
4366 /*! \brief Print call group and pickup group ---*/
4367 char *ast_print_group(char *buf
, int buflen
, ast_group_t group
)
4375 if (!group
) /* Return empty string if no group */
4378 for (i
= 0; i
<= 63; i
++) { /* Max group is 63 */
4379 if (group
& ((ast_group_t
) 1 << i
)) {
4381 strncat(buf
, ", ", buflen
- strlen(buf
) - 1);
4385 snprintf(num
, sizeof(num
), "%u", i
);
4386 strncat(buf
, num
, buflen
- strlen(buf
) - 1);
4392 void ast_set_variables(struct ast_channel
*chan
, struct ast_variable
*vars
)
4394 struct ast_variable
*cur
;
4396 for (cur
= vars
; cur
; cur
= cur
->next
)
4397 pbx_builtin_setvar_helper(chan
, cur
->name
, cur
->value
);
4400 static void *silence_generator_alloc(struct ast_channel
*chan
, void *data
)
4402 /* just store the data pointer in the channel structure */
4406 static void silence_generator_release(struct ast_channel
*chan
, void *data
)
4411 static int silence_generator_generate(struct ast_channel
*chan
, void *data
, int len
, int samples
)
4414 struct ast_frame frame
= {
4415 .frametype
= AST_FRAME_VOICE
,
4416 .subclass
= AST_FORMAT_SLINEAR
,
4419 .datalen
= sizeof(buf
),
4421 memset(buf
, 0, sizeof(buf
));
4422 if (ast_write(chan
, &frame
))
4427 static struct ast_generator silence_generator
= {
4428 .alloc
= silence_generator_alloc
,
4429 .release
= silence_generator_release
,
4430 .generate
= silence_generator_generate
,
4433 struct ast_silence_generator
{
4434 int old_write_format
;
4437 struct ast_silence_generator
*ast_channel_start_silence_generator(struct ast_channel
*chan
)
4439 struct ast_silence_generator
*state
;
4441 if (!(state
= ast_calloc(1, sizeof(*state
)))) {
4445 state
->old_write_format
= chan
->writeformat
;
4447 if (ast_set_write_format(chan
, AST_FORMAT_SLINEAR
) < 0) {
4448 ast_log(LOG_ERROR
, "Could not set write format to SLINEAR\n");
4453 ast_activate_generator(chan
, &silence_generator
, state
);
4456 ast_log(LOG_DEBUG
, "Started silence generator on '%s'\n", chan
->name
);
4461 void ast_channel_stop_silence_generator(struct ast_channel
*chan
, struct ast_silence_generator
*state
)
4466 ast_deactivate_generator(chan
);
4469 ast_log(LOG_DEBUG
, "Stopped silence generator on '%s'\n", chan
->name
);
4471 if (ast_set_write_format(chan
, state
->old_write_format
) < 0)
4472 ast_log(LOG_ERROR
, "Could not return write format to its original state\n");
4478 /*! \ brief Convert channel reloadreason (ENUM) to text string for manager event */
4479 const char *channelreloadreason2txt(enum channelreloadreason reason
)
4482 case CHANNEL_MODULE_LOAD
:
4483 return "LOAD (Channel module load)";
4485 case CHANNEL_MODULE_RELOAD
:
4486 return "RELOAD (Channel module reload)";
4488 case CHANNEL_CLI_RELOAD
:
4489 return "CLIRELOAD (Channel module reload by CLI command)";
4492 return "MANAGERRELOAD (Channel module reload by manager)";
4496 #ifdef DEBUG_CHANNEL_LOCKS
4498 /*! \brief Unlock AST channel (and print debugging output)
4499 \note You need to enable DEBUG_CHANNEL_LOCKS for this function
4501 int ast_channel_unlock(struct ast_channel
*chan
)
4504 if (option_debug
> 2)
4505 ast_log(LOG_DEBUG
, "::::==== Unlocking AST channel %s\n", chan
->name
);
4509 ast_log(LOG_DEBUG
, "::::==== Unlocking non-existing channel \n");
4513 res
= ast_mutex_unlock(&chan
->lock
);
4515 if (option_debug
> 2) {
4516 #ifdef DEBUG_THREADS
4518 if ((count
= chan
->lock
.reentrancy
))
4519 ast_log(LOG_DEBUG
, ":::=== Still have %d locks (recursive)\n", count
);
4523 ast_log(LOG_DEBUG
, "::::==== Channel %s was unlocked\n", chan
->name
);
4524 if (res
== EINVAL
) {
4526 ast_log(LOG_DEBUG
, "::::==== Channel %s had no lock by this thread. Failed unlocking\n", chan
->name
);
4530 /* We had no lock, so okay any way*/
4531 if (option_debug
> 3)
4532 ast_log(LOG_DEBUG
, "::::==== Channel %s was not locked at all \n", chan
->name
);
4538 /*! \brief Lock AST channel (and print debugging output)
4539 \note You need to enable DEBUG_CHANNEL_LOCKS for this function */
4540 int ast_channel_lock(struct ast_channel
*chan
)
4544 if (option_debug
> 3)
4545 ast_log(LOG_DEBUG
, "====:::: Locking AST channel %s\n", chan
->name
);
4547 res
= ast_mutex_lock(&chan
->lock
);
4549 if (option_debug
> 3) {
4550 #ifdef DEBUG_THREADS
4552 if ((count
= chan
->lock
.reentrancy
))
4553 ast_log(LOG_DEBUG
, ":::=== Now have %d locks (recursive)\n", count
);
4556 ast_log(LOG_DEBUG
, "::::==== Channel %s was locked\n", chan
->name
);
4557 if (res
== EDEADLK
) {
4558 /* We had no lock, so okey any way */
4559 if (option_debug
> 3)
4560 ast_log(LOG_DEBUG
, "::::==== Channel %s was not locked by us. Lock would cause deadlock.\n", chan
->name
);
4562 if (res
== EINVAL
) {
4563 if (option_debug
> 3)
4564 ast_log(LOG_DEBUG
, "::::==== Channel %s lock failed. No mutex.\n", chan
->name
);
4570 /*! \brief Lock AST channel (and print debugging output)
4571 \note You need to enable DEBUG_CHANNEL_LOCKS for this function */
4572 int ast_channel_trylock(struct ast_channel
*chan
)
4576 if (option_debug
> 2)
4577 ast_log(LOG_DEBUG
, "====:::: Trying to lock AST channel %s\n", chan
->name
);
4579 res
= ast_mutex_trylock(&chan
->lock
);
4581 if (option_debug
> 2) {
4582 #ifdef DEBUG_THREADS
4584 if ((count
= chan
->lock
.reentrancy
))
4585 ast_log(LOG_DEBUG
, ":::=== Now have %d locks (recursive)\n", count
);
4588 ast_log(LOG_DEBUG
, "::::==== Channel %s was locked\n", chan
->name
);
4590 /* We failed to lock */
4591 if (option_debug
> 2)
4592 ast_log(LOG_DEBUG
, "::::==== Channel %s failed to lock. Not waiting around...\n", chan
->name
);
4594 if (res
== EDEADLK
) {
4595 /* We had no lock, so okey any way*/
4596 if (option_debug
> 2)
4597 ast_log(LOG_DEBUG
, "::::==== Channel %s was not locked. Lock would cause deadlock.\n", chan
->name
);
4599 if (res
== EINVAL
&& option_debug
> 2)
4600 ast_log(LOG_DEBUG
, "::::==== Channel %s lock failed. No mutex.\n", chan
->name
);
4608 * Wrappers for various ast_say_*() functions that call the full version
4609 * of the same functions.
4610 * The proper place would be say.c, but that file is optional and one
4611 * must be able to build asterisk even without it (using a loadable 'say'
4612 * implementation that only supplies the 'full' version of the functions.
4615 int ast_say_number(struct ast_channel
*chan
, int num
,
4616 const char *ints
, const char *language
, const char *options
)
4618 return ast_say_number_full(chan
, num
, ints
, language
, options
, -1, -1);
4621 int ast_say_enumeration(struct ast_channel
*chan
, int num
,
4622 const char *ints
, const char *language
, const char *options
)
4624 return ast_say_enumeration_full(chan
, num
, ints
, language
, options
, -1, -1);
4627 int ast_say_digits(struct ast_channel
*chan
, int num
,
4628 const char *ints
, const char *lang
)
4630 return ast_say_digits_full(chan
, num
, ints
, lang
, -1, -1);
4633 int ast_say_digit_str(struct ast_channel
*chan
, const char *str
,
4634 const char *ints
, const char *lang
)
4636 return ast_say_digit_str_full(chan
, str
, ints
, lang
, -1, -1);
4639 int ast_say_character_str(struct ast_channel
*chan
, const char *str
,
4640 const char *ints
, const char *lang
)
4642 return ast_say_character_str_full(chan
, str
, ints
, lang
, -1, -1);
4645 int ast_say_phonetic_str(struct ast_channel
*chan
, const char *str
,
4646 const char *ints
, const char *lang
)
4648 return ast_say_phonetic_str_full(chan
, str
, ints
, lang
, -1, -1);
4651 int ast_say_digits_full(struct ast_channel
*chan
, int num
,
4652 const char *ints
, const char *lang
, int audiofd
, int ctrlfd
)
4656 snprintf(buf
, sizeof(buf
), "%d", num
);
4657 return ast_say_digit_str_full(chan
, buf
, ints
, lang
, audiofd
, ctrlfd
);