Audit of ao2_iterator_init() usage for v1.8.
[asterisk/asterisk.git] / apps / app_chanspy.c
1 /*
2  * Asterisk -- An open source telephony toolkit.
3  *
4  * Copyright (C) 2005 Anthony Minessale II (anthmct@yahoo.com)
5  * Copyright (C) 2005 - 2008, Digium, Inc.
6  *
7  * A license has been granted to Digium (via disclaimer) for the use of
8  * this code.
9  *
10  * See http://www.asterisk.org for more information about
11  * the Asterisk project. Please do not directly contact
12  * any of the maintainers of this project for assistance;
13  * the project provides a web site, mailing lists and IRC
14  * channels for your use.
15  *
16  * This program is free software, distributed under the terms of
17  * the GNU General Public License Version 2. See the LICENSE file
18  * at the top of the source tree.
19  */
20
21 /*! \file
22  *
23  * \brief ChanSpy: Listen in on any channel.
24  *
25  * \author Anthony Minessale II <anthmct@yahoo.com>
26  * \author Joshua Colp <jcolp@digium.com>
27  * \author Russell Bryant <russell@digium.com>
28  *
29  * \ingroup applications
30  */
31
32 /*** MODULEINFO
33         <support_level>core</support_level>
34  ***/
35
36 #include "asterisk.h"
37
38 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
39
40 #include <ctype.h>
41 #include <errno.h>
42
43 #include "asterisk/paths.h" /* use ast_config_AST_MONITOR_DIR */
44 #include "asterisk/file.h"
45 #include "asterisk/channel.h"
46 #include "asterisk/audiohook.h"
47 #include "asterisk/features.h"
48 #include "asterisk/app.h"
49 #include "asterisk/utils.h"
50 #include "asterisk/say.h"
51 #include "asterisk/pbx.h"
52 #include "asterisk/translate.h"
53 #include "asterisk/manager.h"
54 #include "asterisk/module.h"
55 #include "asterisk/lock.h"
56 #include "asterisk/options.h"
57 #include "asterisk/autochan.h"
58
59 #define AST_NAME_STRLEN 256
60 #define NUM_SPYGROUPS 128
61
62 /*** DOCUMENTATION
63         <application name="ChanSpy" language="en_US">
64                 <synopsis>
65                         Listen to a channel, and optionally whisper into it.
66                 </synopsis>
67                 <syntax>
68                         <parameter name="chanprefix" />
69                         <parameter name="options">
70                                 <optionlist>
71                                         <option name="b">
72                                                 <para>Only spy on channels involved in a bridged call.</para>
73                                         </option>
74                                         <option name="B">
75                                                 <para>Instead of whispering on a single channel barge in on both
76                                                 channels involved in the call.</para>
77                                         </option>
78                                         <option name="c">
79                                                 <argument name="digit" required="true">
80                                                         <para>Specify a DTMF digit that can be used to spy on the next available channel.</para>
81                                                 </argument>
82                                         </option>
83                                         <option name="d">
84                                                 <para>Override the typical numeric DTMF functionality and instead
85                                                 use DTMF to switch between spy modes.</para>
86                                                 <enumlist>
87                                                         <enum name="4">
88                                                                 <para>spy mode</para>
89                                                         </enum>
90                                                         <enum name="5">
91                                                                 <para>whisper mode</para>
92                                                         </enum>
93                                                         <enum name="6">
94                                                                 <para>barge mode</para>
95                                                         </enum>
96                                                 </enumlist>
97                                         </option>
98                                         <option name="e">
99                                                 <argument name="ext" required="true" />
100                                                 <para>Enable <emphasis>enforced</emphasis> mode, so the spying channel can
101                                                 only monitor extensions whose name is in the <replaceable>ext</replaceable> : delimited 
102                                                 list.</para>
103                                         </option>
104                                         <option name="E">
105                                                 <para>Exit when the spied-on channel hangs up.</para>
106                                         </option>
107                                         <option name="g">
108                                                 <argument name="grp" required="true">
109                                                         <para>Only spy on channels in which one or more of the groups
110                                                         listed in <replaceable>grp</replaceable> matches one or more groups from the
111                                                         <variable>SPYGROUP</variable> variable set on the channel to be spied upon.</para>
112                                                 </argument>
113                                                 <note><para>both <replaceable>grp</replaceable> and <variable>SPYGROUP</variable> can contain 
114                                                 either a single group or a colon-delimited list of groups, such
115                                                 as <literal>sales:support:accounting</literal>.</para></note>
116                                         </option>
117                                         <option name="n" argsep="@">
118                                                 <para>Say the name of the person being spied on if that person has recorded
119                                                 his/her name. If a context is specified, then that voicemail context will
120                                                 be searched when retrieving the name, otherwise the <literal>default</literal> context
121                                                 be used when searching for the name (i.e. if SIP/1000 is the channel being
122                                                 spied on and no mailbox is specified, then <literal>1000</literal> will be used when searching
123                                                 for the name).</para>
124                                                 <argument name="mailbox" />
125                                                 <argument name="context" />
126                                         </option>
127                                         <option name="o">
128                                                 <para>Only listen to audio coming from this channel.</para>
129                                         </option>
130                                         <option name="q">
131                                                 <para>Don't play a beep when beginning to spy on a channel, or speak the
132                                                 selected channel name.</para>
133                                         </option>
134                                         <option name="r">
135                                                 <para>Record the session to the monitor spool directory. An optional base for the filename 
136                                                 may be specified. The default is <literal>chanspy</literal>.</para>
137                                                 <argument name="basename" />
138                                         </option>
139                                         <option name="s">
140                                                 <para>Skip the playback of the channel type (i.e. SIP, IAX, etc) when
141                                                 speaking the selected channel name.</para>
142                                         </option>
143                                         <option name="S">
144                                                 <para>Stop when no more channels are left to spy on.</para>
145                                         </option>
146                                         <option name="v">
147                                                 <argument name="value" />
148                                                 <para>Adjust the initial volume in the range from <literal>-4</literal> 
149                                                 to <literal>4</literal>. A negative value refers to a quieter setting.</para>
150                                         </option>
151                                         <option name="w">
152                                                 <para>Enable <literal>whisper</literal> mode, so the spying channel can talk to
153                                                 the spied-on channel.</para>
154                                         </option>
155                                         <option name="W">
156                                                 <para>Enable <literal>private whisper</literal> mode, so the spying channel can
157                                                 talk to the spied-on channel but cannot listen to that channel.</para>
158                                         </option>
159                                         <option name="x">
160                                                 <argument name="digit" required="true">
161                                                         <para>Specify a DTMF digit that can be used to exit the application.</para>
162                                                 </argument>
163                                         </option>
164                                         <option name="X">
165                                                 <para>Allow the user to exit ChanSpy to a valid single digit
166                                                 numeric extension in the current context or the context
167                                                 specified by the <variable>SPY_EXIT_CONTEXT</variable> channel variable. The
168                                                 name of the last channel that was spied on will be stored
169                                                 in the <variable>SPY_CHANNEL</variable> variable.</para>
170                                         </option>
171                                 </optionlist>           
172                         </parameter>
173                 </syntax>
174                 <description>
175                         <para>This application is used to listen to the audio from an Asterisk channel. This includes the audio 
176                         coming in and out of the channel being spied on. If the <literal>chanprefix</literal> parameter is specified,
177                         only channels beginning with this string will be spied upon.</para>
178                         <para>While spying, the following actions may be performed:</para>
179                         <para> - Dialing <literal>#</literal> cycles the volume level.</para>
180                         <para> - Dialing <literal>*</literal> will stop spying and look for another channel to spy on.</para>
181                         <para> - Dialing a series of digits followed by <literal>#</literal> builds a channel name to append
182                         to 'chanprefix'. For example, executing ChanSpy(Agent) and then dialing the digits '1234#' 
183                         while spying will begin spying on the channel 'Agent/1234'. Note that this feature will be overridden if the 'd' option
184                         is used</para>
185                         <note><para>The <replaceable>X</replaceable> option supersedes the three features above in that if a valid
186                         single digit extension exists in the correct context ChanSpy will exit to it.
187                         This also disables choosing a channel based on <literal>chanprefix</literal> and a digit sequence.</para></note>
188                 </description>
189                 <see-also>
190                         <ref type="application">ExtenSpy</ref>
191                 </see-also>
192         </application>
193         <application name="ExtenSpy" language="en_US">
194                 <synopsis>
195                         Listen to a channel, and optionally whisper into it.
196                 </synopsis>
197                 <syntax>
198                         <parameter name="exten" required="true" argsep="@">
199                                 <argument name="exten" required="true">
200                                         <para>Specify extension.</para>
201                                 </argument>
202                                 <argument name="context">
203                                         <para>Optionally specify a context, defaults to <literal>default</literal>.</para>
204                                 </argument>
205                         </parameter>
206                         <parameter name="options">
207                                 <optionlist>
208                                         <option name="b">
209                                                 <para>Only spy on channels involved in a bridged call.</para>
210                                         </option>
211                                         <option name="B">
212                                                 <para>Instead of whispering on a single channel barge in on both
213                                                 channels involved in the call.</para>
214                                         </option>
215                                         <option name="c">
216                                                 <argument name="digit" required="true">
217                                                         <para>Specify a DTMF digit that can be used to spy on the next available channel.</para>
218                                                 </argument>
219                                         </option>
220                                         <option name="d">
221                                                 <para>Override the typical numeric DTMF functionality and instead
222                                                 use DTMF to switch between spy modes.</para>
223                                                 <enumlist>
224                                                         <enum name="4">
225                                                                 <para>spy mode</para>
226                                                         </enum>
227                                                         <enum name="5">
228                                                                 <para>whisper mode</para>
229                                                         </enum>
230                                                         <enum name="6">
231                                                                 <para>barge mode</para>
232                                                         </enum>
233                                                 </enumlist>
234                                         </option>
235                                         <option name="e">
236                                                 <argument name="ext" required="true" />
237                                                 <para>Enable <emphasis>enforced</emphasis> mode, so the spying channel can
238                                                 only monitor extensions whose name is in the <replaceable>ext</replaceable> : delimited 
239                                                 list.</para>
240                                         </option>
241                                         <option name="E">
242                                                 <para>Exit when the spied-on channel hangs up.</para>
243                                         </option>
244                                         <option name="g">
245                                                 <argument name="grp" required="true">
246                                                         <para>Only spy on channels in which one or more of the groups
247                                                         listed in <replaceable>grp</replaceable> matches one or more groups from the
248                                                         <variable>SPYGROUP</variable> variable set on the channel to be spied upon.</para>
249                                                 </argument>
250                                                 <note><para>both <replaceable>grp</replaceable> and <variable>SPYGROUP</variable> can contain 
251                                                 either a single group or a colon-delimited list of groups, such
252                                                 as <literal>sales:support:accounting</literal>.</para></note>
253                                         </option>
254                                         <option name="n" argsep="@">
255                                                 <para>Say the name of the person being spied on if that person has recorded
256                                                 his/her name. If a context is specified, then that voicemail context will
257                                                 be searched when retrieving the name, otherwise the <literal>default</literal> context
258                                                 be used when searching for the name (i.e. if SIP/1000 is the channel being
259                                                 spied on and no mailbox is specified, then <literal>1000</literal> will be used when searching
260                                                 for the name).</para>
261                                                 <argument name="mailbox" />
262                                                 <argument name="context" />
263                                         </option>
264                                         <option name="o">
265                                                 <para>Only listen to audio coming from this channel.</para>
266                                         </option>
267                                         <option name="q">
268                                                 <para>Don't play a beep when beginning to spy on a channel, or speak the
269                                                 selected channel name.</para>
270                                         </option>
271                                         <option name="r">
272                                                 <para>Record the session to the monitor spool directory. An optional base for the filename 
273                                                 may be specified. The default is <literal>chanspy</literal>.</para>
274                                                 <argument name="basename" />
275                                         </option>
276                                         <option name="s">
277                                                 <para>Skip the playback of the channel type (i.e. SIP, IAX, etc) when
278                                                 speaking the selected channel name.</para>
279                                         </option>
280                                         <option name="S">
281                                                 <para>Stop when there are no more extensions left to spy on.</para>
282                                         </option>
283                                         <option name="v">
284                                                 <argument name="value" />
285                                                 <para>Adjust the initial volume in the range from <literal>-4</literal> 
286                                                 to <literal>4</literal>. A negative value refers to a quieter setting.</para>
287                                         </option>
288                                         <option name="w">
289                                                 <para>Enable <literal>whisper</literal> mode, so the spying channel can talk to
290                                                 the spied-on channel.</para>
291                                         </option>
292                                         <option name="W">
293                                                 <para>Enable <literal>private whisper</literal> mode, so the spying channel can
294                                                 talk to the spied-on channel but cannot listen to that channel.</para>
295                                         </option>
296                                         <option name="x">
297                                                 <argument name="digit" required="true">
298                                                         <para>Specify a DTMF digit that can be used to exit the application.</para>
299                                                 </argument>
300                                         </option>
301                                         <option name="X">
302                                                 <para>Allow the user to exit ChanSpy to a valid single digit
303                                                 numeric extension in the current context or the context
304                                                 specified by the <variable>SPY_EXIT_CONTEXT</variable> channel variable. The
305                                                 name of the last channel that was spied on will be stored
306                                                 in the <variable>SPY_CHANNEL</variable> variable.</para>
307                                         </option>
308                                 </optionlist>   
309                         </parameter>
310                 </syntax>
311                 <description>
312                         <para>This application is used to listen to the audio from an Asterisk channel. This includes 
313                         the audio coming in and out of the channel being spied on. Only channels created by outgoing calls for the
314                         specified extension will be selected for spying. If the optional context is not supplied, 
315                         the current channel's context will be used.</para>
316                         <para>While spying, the following actions may be performed:</para>
317                         <para> - Dialing <literal>#</literal> cycles the volume level.</para>
318                         <para> - Dialing <literal>*</literal> will stop spying and look for another channel to spy on.</para>
319                         <note><para>The <replaceable>X</replaceable> option supersedes the three features above in that if a valid
320                         single digit extension exists in the correct context ChanSpy will exit to it.
321                         This also disables choosing a channel based on <literal>chanprefix</literal> and a digit sequence.</para></note>
322                 </description>
323                 <see-also>
324                         <ref type="application">ChanSpy</ref>
325                 </see-also>
326         </application>
327         
328         <application name="DAHDIScan" language="en_US">
329                 <synopsis>
330                         Scan DAHDI channels to monitor calls.
331                 </synopsis>
332                 <syntax>
333                         <parameter name="group">
334                                 <para>Limit scanning to a channel <replaceable>group</replaceable> by setting this option.</para>
335                         </parameter>
336                 </syntax>
337                 <description>
338                         <para>Allows a call center manager to monitor DAHDI channels in a
339                         convenient way.  Use <literal>#</literal> to select the next channel and use <literal>*</literal> to exit.</para>
340                 </description>
341         </application>
342  ***/
343
344 static const char app_chan[] = "ChanSpy";
345
346 static const char app_ext[] = "ExtenSpy";
347
348 static const char app_dahdiscan[] = "DAHDIScan";
349
350 enum {
351         OPTION_QUIET             = (1 << 0),    /* Quiet, no announcement */
352         OPTION_BRIDGED           = (1 << 1),    /* Only look at bridged calls */
353         OPTION_VOLUME            = (1 << 2),    /* Specify initial volume */
354         OPTION_GROUP             = (1 << 3),    /* Only look at channels in group */
355         OPTION_RECORD            = (1 << 4),
356         OPTION_WHISPER           = (1 << 5),
357         OPTION_PRIVATE           = (1 << 6),    /* Private Whisper mode */
358         OPTION_READONLY          = (1 << 7),    /* Don't mix the two channels */
359         OPTION_EXIT              = (1 << 8),    /* Exit to a valid single digit extension */
360         OPTION_ENFORCED          = (1 << 9),    /* Enforced mode */
361         OPTION_NOTECH            = (1 << 10),   /* Skip technology name playback */
362         OPTION_BARGE             = (1 << 11),   /* Barge mode (whisper to both channels) */
363         OPTION_NAME              = (1 << 12),   /* Say the name of the person on whom we will spy */
364         OPTION_DTMF_SWITCH_MODES = (1 << 13),   /* Allow numeric DTMF to switch between chanspy modes */
365         OPTION_DTMF_EXIT         = (1 << 14),   /* Set DTMF to exit, added for DAHDIScan integration */
366         OPTION_DTMF_CYCLE        = (1 << 15),   /* Custom DTMF for cycling next avaliable channel, (default is '*') */
367         OPTION_DAHDI_SCAN        = (1 << 16),   /* Scan groups in DAHDIScan mode */
368         OPTION_STOP              = (1 << 17),
369         OPTION_EXITONHANGUP      = (1 << 18),   /* Hang up when the spied-on channel hangs up. */
370 };
371
372 enum {
373         OPT_ARG_VOLUME = 0,
374         OPT_ARG_GROUP,
375         OPT_ARG_RECORD,
376         OPT_ARG_ENFORCED,
377         OPT_ARG_NAME,
378         OPT_ARG_EXIT,
379         OPT_ARG_CYCLE,
380         OPT_ARG_ARRAY_SIZE,
381 };
382
383 AST_APP_OPTIONS(spy_opts, {
384         AST_APP_OPTION('b', OPTION_BRIDGED),
385         AST_APP_OPTION('B', OPTION_BARGE),
386         AST_APP_OPTION_ARG('c', OPTION_DTMF_CYCLE, OPT_ARG_CYCLE),
387         AST_APP_OPTION('d', OPTION_DTMF_SWITCH_MODES),
388         AST_APP_OPTION_ARG('e', OPTION_ENFORCED, OPT_ARG_ENFORCED),
389         AST_APP_OPTION('E', OPTION_EXITONHANGUP),
390         AST_APP_OPTION_ARG('g', OPTION_GROUP, OPT_ARG_GROUP),
391         AST_APP_OPTION_ARG('n', OPTION_NAME, OPT_ARG_NAME),
392         AST_APP_OPTION('o', OPTION_READONLY),
393         AST_APP_OPTION('q', OPTION_QUIET),
394         AST_APP_OPTION_ARG('r', OPTION_RECORD, OPT_ARG_RECORD),
395         AST_APP_OPTION('s', OPTION_NOTECH),
396         AST_APP_OPTION('S', OPTION_STOP),
397         AST_APP_OPTION_ARG('v', OPTION_VOLUME, OPT_ARG_VOLUME),
398         AST_APP_OPTION('w', OPTION_WHISPER),
399         AST_APP_OPTION('W', OPTION_PRIVATE),
400         AST_APP_OPTION_ARG('x', OPTION_DTMF_EXIT, OPT_ARG_EXIT),
401         AST_APP_OPTION('X', OPTION_EXIT),
402 });
403
404 struct chanspy_translation_helper {
405         /* spy data */
406         struct ast_audiohook spy_audiohook;
407         struct ast_audiohook whisper_audiohook;
408         struct ast_audiohook bridge_whisper_audiohook;
409         int fd;
410         int volfactor;
411         struct ast_flags flags;
412 };
413
414 struct spy_dtmf_options {
415         char exit;
416         char cycle;
417         char volume;
418 };
419
420 static void *spy_alloc(struct ast_channel *chan, void *data)
421 {
422         /* just store the data pointer in the channel structure */
423         return data;
424 }
425
426 static void spy_release(struct ast_channel *chan, void *data)
427 {
428         /* nothing to do */
429 }
430
431 static int spy_generate(struct ast_channel *chan, void *data, int len, int samples)
432 {
433         struct chanspy_translation_helper *csth = data;
434         struct ast_frame *f, *cur;
435         struct ast_format format_slin;
436
437         ast_format_set(&format_slin, AST_FORMAT_SLINEAR, 0);
438
439         ast_audiohook_lock(&csth->spy_audiohook);
440         if (csth->spy_audiohook.status != AST_AUDIOHOOK_STATUS_RUNNING) {
441                 /* Channel is already gone more than likely */
442                 ast_audiohook_unlock(&csth->spy_audiohook);
443                 return -1;
444         }
445
446         if (ast_test_flag(&csth->flags, OPTION_READONLY)) {
447                 /* Option 'o' was set, so don't mix channel audio */
448                 f = ast_audiohook_read_frame(&csth->spy_audiohook, samples, AST_AUDIOHOOK_DIRECTION_READ, &format_slin);
449         } else {
450                 f = ast_audiohook_read_frame(&csth->spy_audiohook, samples, AST_AUDIOHOOK_DIRECTION_BOTH, &format_slin);
451         }
452
453         ast_audiohook_unlock(&csth->spy_audiohook);
454
455         if (!f)
456                 return 0;
457
458         for (cur = f; cur; cur = AST_LIST_NEXT(cur, frame_list)) {
459                 if (ast_write(chan, cur)) {
460                         ast_frfree(f);
461                         return -1;
462                 }
463
464                 if (csth->fd) {
465                         if (write(csth->fd, cur->data.ptr, cur->datalen) < 0) {
466                                 ast_log(LOG_WARNING, "write() failed: %s\n", strerror(errno));
467                         }
468                 }
469         }
470
471         ast_frfree(f);
472
473         return 0;
474 }
475
476 static struct ast_generator spygen = {
477         .alloc = spy_alloc,
478         .release = spy_release,
479         .generate = spy_generate,
480 };
481
482 static int start_spying(struct ast_autochan *autochan, const char *spychan_name, struct ast_audiohook *audiohook)
483 {
484         int res = 0;
485         struct ast_channel *peer = NULL;
486
487         ast_log(LOG_NOTICE, "Attaching %s to %s\n", spychan_name, ast_channel_name(autochan->chan));
488
489         ast_set_flag(audiohook, AST_AUDIOHOOK_TRIGGER_SYNC | AST_AUDIOHOOK_SMALL_QUEUE);
490         res = ast_audiohook_attach(autochan->chan, audiohook);
491
492         if (!res && ast_test_flag(autochan->chan, AST_FLAG_NBRIDGE) && (peer = ast_bridged_channel(autochan->chan))) {
493                 ast_softhangup(peer, AST_SOFTHANGUP_UNBRIDGE);
494         }
495         return res;
496 }
497
498 static void change_spy_mode(const char digit, struct ast_flags *flags)
499 {
500         if (digit == '4') {
501                 ast_clear_flag(flags, OPTION_WHISPER);
502                 ast_clear_flag(flags, OPTION_BARGE);
503         } else if (digit == '5') {
504                 ast_clear_flag(flags, OPTION_BARGE);
505                 ast_set_flag(flags, OPTION_WHISPER);
506         } else if (digit == '6') {
507                 ast_clear_flag(flags, OPTION_WHISPER);
508                 ast_set_flag(flags, OPTION_BARGE);
509         }
510 }
511
512 static int channel_spy(struct ast_channel *chan, struct ast_autochan *spyee_autochan,
513         int *volfactor, int fd, struct spy_dtmf_options *user_options, struct ast_flags *flags,
514         char *exitcontext)
515 {
516         struct chanspy_translation_helper csth;
517         int running = 0, res, x = 0;
518         char inp[24] = {0};
519         char *name;
520         struct ast_frame *f;
521         struct ast_silence_generator *silgen = NULL;
522         struct ast_autochan *spyee_bridge_autochan = NULL;
523         const char *spyer_name;
524         struct ast_channel *chans[] = { chan, spyee_autochan->chan };
525
526         ast_channel_lock(chan);
527         spyer_name = ast_strdupa(ast_channel_name(chan));
528         ast_channel_unlock(chan);
529
530         /* We now hold the channel lock on spyee */
531
532         if (ast_check_hangup(chan) || ast_check_hangup(spyee_autochan->chan)) {
533                 return 0;
534         }
535
536         ast_channel_lock(spyee_autochan->chan);
537         name = ast_strdupa(ast_channel_name(spyee_autochan->chan));
538         ast_channel_unlock(spyee_autochan->chan);
539
540         ast_verb(2, "Spying on channel %s\n", name);
541         ast_manager_event_multichan(EVENT_FLAG_CALL, "ChanSpyStart", 2, chans,
542                         "SpyerChannel: %s\r\n"
543                         "SpyeeChannel: %s\r\n",
544                         spyer_name, name);
545
546         memset(&csth, 0, sizeof(csth));
547         ast_copy_flags(&csth.flags, flags, AST_FLAGS_ALL);
548
549         /* This is the audiohook which gives us the audio off the channel we are
550            spying on.
551         */
552         ast_audiohook_init(&csth.spy_audiohook, AST_AUDIOHOOK_TYPE_SPY, "ChanSpy", 0);
553
554         if (start_spying(spyee_autochan, spyer_name, &csth.spy_audiohook)) {
555                 ast_audiohook_destroy(&csth.spy_audiohook);
556                 return 0;
557         }
558
559         if (ast_test_flag(flags, OPTION_WHISPER | OPTION_BARGE | OPTION_DTMF_SWITCH_MODES)) {
560                 /* This audiohook will let us inject audio from our channel into the
561                    channel we are currently spying on.
562                 */
563                 ast_audiohook_init(&csth.whisper_audiohook, AST_AUDIOHOOK_TYPE_WHISPER, "ChanSpy", 0);
564
565                 if (start_spying(spyee_autochan, spyer_name, &csth.whisper_audiohook)) {
566                         ast_log(LOG_WARNING, "Unable to attach whisper audiohook to spyee %s. Whisper mode disabled!\n", name);
567                 }
568         }
569
570         if (ast_test_flag(flags, OPTION_BARGE | OPTION_DTMF_SWITCH_MODES)) {
571                 /* And this hook lets us inject audio into the channel that the spied on
572                    channel is currently bridged with.
573                 */
574                 ast_audiohook_init(&csth.bridge_whisper_audiohook, AST_AUDIOHOOK_TYPE_WHISPER, "Chanspy", 0);
575
576                 if ((spyee_bridge_autochan = ast_autochan_setup(ast_bridged_channel(spyee_autochan->chan)))) {
577                         ast_channel_lock(spyee_bridge_autochan->chan);
578                         if (start_spying(spyee_bridge_autochan, spyer_name, &csth.bridge_whisper_audiohook)) {
579                                 ast_log(LOG_WARNING, "Unable to attach barge audiohook on spyee %s. Barge mode disabled!\n", name);
580                         }
581                         ast_channel_unlock(spyee_bridge_autochan->chan);
582                 }
583         }
584
585         ast_channel_lock(chan);
586         ast_set_flag(chan, AST_FLAG_END_DTMF_ONLY);
587         ast_channel_unlock(chan);
588
589         csth.volfactor = *volfactor;
590
591         if (csth.volfactor) {
592                 csth.spy_audiohook.options.read_volume = csth.volfactor;
593                 csth.spy_audiohook.options.write_volume = csth.volfactor;
594         }
595
596         csth.fd = fd;
597
598         if (ast_test_flag(flags, OPTION_PRIVATE))
599                 silgen = ast_channel_start_silence_generator(chan);
600         else
601                 ast_activate_generator(chan, &spygen, &csth);
602
603         /* We can no longer rely on 'spyee' being an actual channel;
604            it can be hung up and freed out from under us. However, the
605            channel destructor will put NULL into our csth.spy.chan
606            field when that happens, so that is our signal that the spyee
607            channel has gone away.
608         */
609
610         /* Note: it is very important that the ast_waitfor() be the first
611            condition in this expression, so that if we wait for some period
612            of time before receiving a frame from our spying channel, we check
613            for hangup on the spied-on channel _after_ knowing that a frame
614            has arrived, since the spied-on channel could have gone away while
615            we were waiting
616         */
617         while ((res = ast_waitfor(chan, -1) > -1) && csth.spy_audiohook.status == AST_AUDIOHOOK_STATUS_RUNNING) {
618                 if (!(f = ast_read(chan)) || ast_check_hangup(chan)) {
619                         running = -1;
620                         break;
621                 }
622
623                 if (ast_test_flag(flags, OPTION_BARGE) && f->frametype == AST_FRAME_VOICE) {
624                         ast_audiohook_lock(&csth.whisper_audiohook);
625                         ast_audiohook_lock(&csth.bridge_whisper_audiohook);
626                         ast_audiohook_write_frame(&csth.whisper_audiohook, AST_AUDIOHOOK_DIRECTION_WRITE, f);
627                         ast_audiohook_write_frame(&csth.bridge_whisper_audiohook, AST_AUDIOHOOK_DIRECTION_WRITE, f);
628                         ast_audiohook_unlock(&csth.whisper_audiohook);
629                         ast_audiohook_unlock(&csth.bridge_whisper_audiohook);
630                         ast_frfree(f);
631                         continue;
632                 } else if (ast_test_flag(flags, OPTION_WHISPER) && f->frametype == AST_FRAME_VOICE) {
633                         ast_audiohook_lock(&csth.whisper_audiohook);
634                         ast_audiohook_write_frame(&csth.whisper_audiohook, AST_AUDIOHOOK_DIRECTION_WRITE, f);
635                         ast_audiohook_unlock(&csth.whisper_audiohook);
636                         ast_frfree(f);
637                         continue;
638                 }
639                 
640                 res = (f->frametype == AST_FRAME_DTMF) ? f->subclass.integer : 0;
641                 ast_frfree(f);
642                 if (!res)
643                         continue;
644
645                 if (x == sizeof(inp))
646                         x = 0;
647
648                 if (res < 0) {
649                         running = -1;
650                         break;
651                 }
652
653                 if (ast_test_flag(flags, OPTION_EXIT)) {
654                         char tmp[2];
655                         tmp[0] = res;
656                         tmp[1] = '\0';
657                         if (!ast_goto_if_exists(chan, exitcontext, tmp, 1)) {
658                                 ast_debug(1, "Got DTMF %c, goto context %s\n", tmp[0], exitcontext);
659                                 pbx_builtin_setvar_helper(chan, "SPY_CHANNEL", name);
660                                 running = -2;
661                                 break;
662                         } else {
663                                 ast_debug(2, "Exit by single digit did not work in chanspy. Extension %s does not exist in context %s\n", tmp, exitcontext);
664                         }
665                 } else if (res >= '0' && res <= '9') {
666                         if (ast_test_flag(flags, OPTION_DTMF_SWITCH_MODES)) {
667                                 change_spy_mode(res, flags);
668                         } else {
669                                 inp[x++] = res;
670                         }
671                 }
672
673                 if (res == user_options->cycle) {
674                         running = 0;
675                         break;
676                 } else if (res == user_options->exit) {
677                         running = -2;
678                         break;
679                 } else if (res == user_options->volume) {
680                         if (!ast_strlen_zero(inp)) {
681                                 running = atoi(inp);
682                                 break;
683                         }
684
685                         (*volfactor)++;
686                         if (*volfactor > 4)
687                                 *volfactor = -4;
688                         ast_verb(3, "Setting spy volume on %s to %d\n", ast_channel_name(chan), *volfactor);
689
690                         csth.volfactor = *volfactor;
691                         csth.spy_audiohook.options.read_volume = csth.volfactor;
692                         csth.spy_audiohook.options.write_volume = csth.volfactor;
693                 }
694         }
695
696         if (ast_test_flag(flags, OPTION_PRIVATE))
697                 ast_channel_stop_silence_generator(chan, silgen);
698         else
699                 ast_deactivate_generator(chan);
700
701         ast_channel_lock(chan);
702         ast_clear_flag(chan, AST_FLAG_END_DTMF_ONLY);
703         ast_channel_unlock(chan);
704
705         if (ast_test_flag(flags, OPTION_WHISPER | OPTION_BARGE | OPTION_DTMF_SWITCH_MODES)) {
706                 ast_audiohook_lock(&csth.whisper_audiohook);
707                 ast_audiohook_detach(&csth.whisper_audiohook);
708                 ast_audiohook_unlock(&csth.whisper_audiohook);
709                 ast_audiohook_destroy(&csth.whisper_audiohook);
710         }
711
712         if (ast_test_flag(flags, OPTION_BARGE | OPTION_DTMF_SWITCH_MODES)) {
713                 ast_audiohook_lock(&csth.bridge_whisper_audiohook);
714                 ast_audiohook_detach(&csth.bridge_whisper_audiohook);
715                 ast_audiohook_unlock(&csth.bridge_whisper_audiohook);
716                 ast_audiohook_destroy(&csth.bridge_whisper_audiohook);
717         }
718
719         ast_audiohook_lock(&csth.spy_audiohook);
720         ast_audiohook_detach(&csth.spy_audiohook);
721         ast_audiohook_unlock(&csth.spy_audiohook);
722         ast_audiohook_destroy(&csth.spy_audiohook);
723
724         if (spyee_bridge_autochan) {
725                 ast_autochan_destroy(spyee_bridge_autochan);
726         }
727
728         ast_verb(2, "Done Spying on channel %s\n", name);
729         ast_manager_event(chan, EVENT_FLAG_CALL, "ChanSpyStop", "SpyeeChannel: %s\r\n", name);
730
731         return running;
732 }
733
734 static struct ast_autochan *next_channel(struct ast_channel_iterator *iter,
735                 struct ast_autochan *autochan, struct ast_channel *chan)
736 {
737         struct ast_channel *next;
738         struct ast_autochan *autochan_store;
739         const size_t pseudo_len = strlen("DAHDI/pseudo");
740
741         if (!iter) {
742                 return NULL;
743         }
744
745 redo:
746         if (!(next = ast_channel_iterator_next(iter))) {
747                 return NULL;
748         }
749
750         if (!strncmp(ast_channel_name(next), "DAHDI/pseudo", pseudo_len)) {
751                 goto redo;
752         } else if (next == chan) {
753                 goto redo;
754         }
755
756         autochan_store = ast_autochan_setup(next);
757         ast_channel_unref(next);
758
759         return autochan_store;
760 }
761
762 static int common_exec(struct ast_channel *chan, struct ast_flags *flags,
763         int volfactor, const int fd, struct spy_dtmf_options *user_options,
764         const char *mygroup, const char *myenforced, const char *spec, const char *exten,
765         const char *context, const char *mailbox, const char *name_context)
766 {
767         char nameprefix[AST_NAME_STRLEN];
768         char peer_name[AST_NAME_STRLEN + 5];
769         char exitcontext[AST_MAX_CONTEXT] = "";
770         signed char zero_volume = 0;
771         int waitms;
772         int res;
773         char *ptr;
774         int num;
775         int num_spyed_upon = 1;
776         struct ast_channel_iterator *iter = NULL;
777
778         if (ast_test_flag(flags, OPTION_EXIT)) {
779                 const char *c;
780                 ast_channel_lock(chan);
781                 if ((c = pbx_builtin_getvar_helper(chan, "SPY_EXIT_CONTEXT"))) {
782                         ast_copy_string(exitcontext, c, sizeof(exitcontext));
783                 } else if (!ast_strlen_zero(chan->macrocontext)) {
784                         ast_copy_string(exitcontext, chan->macrocontext, sizeof(exitcontext));
785                 } else {
786                         ast_copy_string(exitcontext, chan->context, sizeof(exitcontext));
787                 }
788                 ast_channel_unlock(chan);
789         }
790
791         if (chan->_state != AST_STATE_UP)
792                 ast_answer(chan);
793
794         ast_set_flag(chan, AST_FLAG_SPYING); /* so nobody can spy on us while we are spying */
795
796         waitms = 100;
797
798         for (;;) {
799                 struct ast_autochan *autochan = NULL, *next_autochan = NULL;
800                 struct ast_channel *prev = NULL;
801
802                 if (!ast_test_flag(flags, OPTION_QUIET) && num_spyed_upon) {
803                         res = ast_streamfile(chan, "beep", ast_channel_language(chan));
804                         if (!res)
805                                 res = ast_waitstream(chan, "");
806                         else if (res < 0) {
807                                 ast_clear_flag(chan, AST_FLAG_SPYING);
808                                 break;
809                         }
810                         if (!ast_strlen_zero(exitcontext)) {
811                                 char tmp[2];
812                                 tmp[0] = res;
813                                 tmp[1] = '\0';
814                                 if (!ast_goto_if_exists(chan, exitcontext, tmp, 1))
815                                         goto exit;
816                                 else
817                                         ast_debug(2, "Exit by single digit did not work in chanspy. Extension %s does not exist in context %s\n", tmp, exitcontext);
818                         }
819                 }
820
821                 /* Set up the iterator we'll be using during this call */
822                 if (!ast_strlen_zero(spec)) {
823                         iter = ast_channel_iterator_by_name_new(spec, strlen(spec));
824                 } else if (!ast_strlen_zero(exten)) {
825                         iter = ast_channel_iterator_by_exten_new(exten, context);
826                 } else {
827                         iter = ast_channel_iterator_all_new();
828                 }
829
830                 if (!iter) {
831                         res = -1;
832                         goto exit;
833                 }
834
835                 res = ast_waitfordigit(chan, waitms);
836                 if (res < 0) {
837                         iter = ast_channel_iterator_destroy(iter);
838                         ast_clear_flag(chan, AST_FLAG_SPYING);
839                         break;
840                 }
841                 if (!ast_strlen_zero(exitcontext)) {
842                         char tmp[2];
843                         tmp[0] = res;
844                         tmp[1] = '\0';
845                         if (!ast_goto_if_exists(chan, exitcontext, tmp, 1)) {
846                                 iter = ast_channel_iterator_destroy(iter);
847                                 goto exit;
848                         } else {
849                                 ast_debug(2, "Exit by single digit did not work in chanspy. Extension %s does not exist in context %s\n", tmp, exitcontext);
850                         }
851                 }
852
853                 /* reset for the next loop around, unless overridden later */
854                 waitms = 100;
855                 num_spyed_upon = 0;
856
857                 for (autochan = next_channel(iter, autochan, chan);
858                      autochan;
859                          prev = autochan->chan, ast_autochan_destroy(autochan),
860                      autochan = next_autochan ? next_autochan : 
861                                 next_channel(iter, autochan, chan), next_autochan = NULL) {
862                         int igrp = !mygroup;
863                         int ienf = !myenforced;
864                         char *s;
865
866                         if (autochan->chan == prev) {
867                                 ast_autochan_destroy(autochan);
868                                 break;
869                         }
870
871                         if (ast_check_hangup(chan)) {
872                                 ast_autochan_destroy(autochan);
873                                 break;
874                         }
875
876                         if (ast_test_flag(flags, OPTION_BRIDGED) && !ast_bridged_channel(autochan->chan)) {
877                                 continue;
878                         }
879
880                         if (ast_check_hangup(autochan->chan) || ast_test_flag(autochan->chan, AST_FLAG_SPYING)) {
881                                 continue;
882                         }
883
884                         if (mygroup) {
885                                 int num_groups = 0;
886                                 int num_mygroups = 0;
887                                 char dup_group[512];
888                                 char dup_mygroup[512];
889                                 char *groups[NUM_SPYGROUPS];
890                                 char *mygroups[NUM_SPYGROUPS];
891                                 const char *group = NULL;
892                                 int x;
893                                 int y;
894                                 ast_copy_string(dup_mygroup, mygroup, sizeof(dup_mygroup));
895                                 num_mygroups = ast_app_separate_args(dup_mygroup, ':', mygroups,
896                                         ARRAY_LEN(mygroups));
897
898                                 /* Before dahdi scan was part of chanspy, it would use the "GROUP" variable 
899                                  * rather than "SPYGROUP", this check is done to preserve expected behavior */
900                                 if (ast_test_flag(flags, OPTION_DAHDI_SCAN)) {
901                                         group = pbx_builtin_getvar_helper(autochan->chan, "GROUP");
902                                 } else {
903                                         group = pbx_builtin_getvar_helper(autochan->chan, "SPYGROUP");
904                                 }
905
906                                 if (!ast_strlen_zero(group)) {
907                                         ast_copy_string(dup_group, group, sizeof(dup_group));
908                                         num_groups = ast_app_separate_args(dup_group, ':', groups,
909                                                 ARRAY_LEN(groups));
910                                 }
911
912                                 for (y = 0; y < num_mygroups; y++) {
913                                         for (x = 0; x < num_groups; x++) {
914                                                 if (!strcmp(mygroups[y], groups[x])) {
915                                                         igrp = 1;
916                                                         break;
917                                                 }
918                                         }
919                                 }
920                         }
921
922                         if (!igrp) {
923                                 continue;
924                         }
925                         if (myenforced) {
926                                 char ext[AST_CHANNEL_NAME + 3];
927                                 char buffer[512];
928                                 char *end;
929
930                                 snprintf(buffer, sizeof(buffer) - 1, ":%s:", myenforced);
931
932                                 ast_copy_string(ext + 1, ast_channel_name(autochan->chan), sizeof(ext) - 1);
933                                 if ((end = strchr(ext, '-'))) {
934                                         *end++ = ':';
935                                         *end = '\0';
936                                 }
937
938                                 ext[0] = ':';
939
940                                 if (strcasestr(buffer, ext)) {
941                                         ienf = 1;
942                                 }
943                         }
944
945                         if (!ienf) {
946                                 continue;
947                         }
948
949                         strcpy(peer_name, "spy-");
950                         strncat(peer_name, ast_channel_name(autochan->chan), AST_NAME_STRLEN - 4 - 1);
951                         ptr = strchr(peer_name, '/');
952                         *ptr++ = '\0';
953                         ptr = strsep(&ptr, "-");
954
955                         for (s = peer_name; s < ptr; s++)
956                                 *s = tolower(*s);
957
958                         if (!ast_test_flag(flags, OPTION_QUIET)) {
959                                 if (ast_test_flag(flags, OPTION_NAME)) {
960                                         const char *local_context = S_OR(name_context, "default");
961                                         const char *local_mailbox = S_OR(mailbox, ptr);
962                                         res = ast_app_sayname(chan, local_mailbox, local_context);
963                                 }
964                                 if (!ast_test_flag(flags, OPTION_NAME) || res < 0) {
965                                         if (!ast_test_flag(flags, OPTION_NOTECH)) {
966                                                 if (ast_fileexists(peer_name, NULL, NULL) > 0) {
967                                                         res = ast_streamfile(chan, peer_name, ast_channel_language(chan));
968                                                         if (!res) {
969                                                                 res = ast_waitstream(chan, "");
970                                                         }
971                                                         if (res) {
972                                                                 ast_autochan_destroy(autochan);
973                                                                 break;
974                                                         }
975                                                 } else {
976                                                         res = ast_say_character_str(chan, peer_name, "", ast_channel_language(chan));
977                                                 }
978                                         }
979                                         if ((num = atoi(ptr)))
980                                                 ast_say_digits(chan, atoi(ptr), "", ast_channel_language(chan));
981                                 }
982                         }
983
984                         res = channel_spy(chan, autochan, &volfactor, fd, user_options, flags, exitcontext);
985                         num_spyed_upon++;
986
987                         if (res == -1) {
988                                 ast_autochan_destroy(autochan);
989                                 iter = ast_channel_iterator_destroy(iter);
990                                 goto exit;
991                         } else if (res == -2) {
992                                 res = 0;
993                                 ast_autochan_destroy(autochan);
994                                 iter = ast_channel_iterator_destroy(iter);
995                                 goto exit;
996                         } else if (res > 1 && spec) {
997                                 struct ast_channel *next;
998
999                                 snprintf(nameprefix, AST_NAME_STRLEN, "%s/%d", spec, res);
1000
1001                                 if ((next = ast_channel_get_by_name_prefix(nameprefix, strlen(nameprefix)))) {
1002                                         next_autochan = ast_autochan_setup(next);
1003                                         next = ast_channel_unref(next);
1004                                 } else {
1005                                         /* stay on this channel, if it is still valid */
1006                                         if (!ast_check_hangup(autochan->chan)) {
1007                                                 next_autochan = ast_autochan_setup(autochan->chan);
1008                                         } else {
1009                                                 /* the channel is gone */
1010                                                 next_autochan = NULL;
1011                                         }
1012                                 }
1013                         } else if (res == 0 && ast_test_flag(flags, OPTION_EXITONHANGUP)) {
1014                                 iter = ast_channel_iterator_destroy(iter);
1015                                 goto exit;
1016                         }
1017                 }
1018
1019                 iter = ast_channel_iterator_destroy(iter);
1020
1021                 if (res == -1 || ast_check_hangup(chan))
1022                         break;
1023                 if (ast_test_flag(flags, OPTION_STOP) && !next_autochan) {
1024                         break;
1025                 }
1026         }
1027 exit:
1028
1029         ast_clear_flag(chan, AST_FLAG_SPYING);
1030
1031         ast_channel_setoption(chan, AST_OPTION_TXGAIN, &zero_volume, sizeof(zero_volume), 0);
1032
1033         return res;
1034 }
1035
1036 static int chanspy_exec(struct ast_channel *chan, const char *data)
1037 {
1038         char *myenforced = NULL;
1039         char *mygroup = NULL;
1040         char *recbase = NULL;
1041         int fd = 0;
1042         struct ast_flags flags;
1043         struct spy_dtmf_options user_options = {
1044                 .cycle = '*',
1045                 .volume = '#',
1046                 .exit = '\0',
1047         };
1048         struct ast_format oldwf;
1049         int volfactor = 0;
1050         int res;
1051         char *mailbox = NULL;
1052         char *name_context = NULL;
1053         AST_DECLARE_APP_ARGS(args,
1054                 AST_APP_ARG(spec);
1055                 AST_APP_ARG(options);
1056         );
1057         char *opts[OPT_ARG_ARRAY_SIZE];
1058         char *parse = ast_strdupa(data);
1059
1060         AST_STANDARD_APP_ARGS(args, parse);
1061         ast_format_clear(&oldwf);
1062
1063         if (args.spec && !strcmp(args.spec, "all"))
1064                 args.spec = NULL;
1065
1066         if (args.options) {
1067                 char tmp;
1068                 ast_app_parse_options(spy_opts, &flags, opts, args.options);
1069                 if (ast_test_flag(&flags, OPTION_GROUP))
1070                         mygroup = opts[OPT_ARG_GROUP];
1071
1072                 if (ast_test_flag(&flags, OPTION_RECORD) &&
1073                         !(recbase = opts[OPT_ARG_RECORD]))
1074                         recbase = "chanspy";
1075
1076                 if (ast_test_flag(&flags, OPTION_DTMF_EXIT) && opts[OPT_ARG_EXIT]) {
1077                         tmp = opts[OPT_ARG_EXIT][0];
1078                         if (strchr("0123456789*#", tmp) && tmp != '\0') {
1079                                 user_options.exit = tmp;
1080                         } else {
1081                                 ast_log(LOG_NOTICE, "Argument for option 'x' must be a valid DTMF digit.");
1082                         }
1083                 }
1084
1085                 if (ast_test_flag(&flags, OPTION_DTMF_CYCLE) && opts[OPT_ARG_CYCLE]) {
1086                         tmp = opts[OPT_ARG_CYCLE][0];
1087                         if (strchr("0123456789*#", tmp) && tmp != '\0') {
1088                                 user_options.cycle = tmp;
1089                         } else {
1090                                 ast_log(LOG_NOTICE, "Argument for option 'c' must be a valid DTMF digit.");
1091                         }
1092                 }
1093
1094                 if (ast_test_flag(&flags, OPTION_VOLUME) && opts[OPT_ARG_VOLUME]) {
1095                         int vol;
1096
1097                         if ((sscanf(opts[OPT_ARG_VOLUME], "%30d", &vol) != 1) || (vol > 4) || (vol < -4))
1098                                 ast_log(LOG_NOTICE, "Volume factor must be a number between -4 and 4\n");
1099                         else
1100                                 volfactor = vol;
1101                 }
1102
1103                 if (ast_test_flag(&flags, OPTION_PRIVATE))
1104                         ast_set_flag(&flags, OPTION_WHISPER);
1105
1106                 if (ast_test_flag(&flags, OPTION_ENFORCED))
1107                         myenforced = opts[OPT_ARG_ENFORCED];
1108
1109                 if (ast_test_flag(&flags, OPTION_NAME)) {
1110                         if (!ast_strlen_zero(opts[OPT_ARG_NAME])) {
1111                                 char *delimiter;
1112                                 if ((delimiter = strchr(opts[OPT_ARG_NAME], '@'))) {
1113                                         mailbox = opts[OPT_ARG_NAME];
1114                                         *delimiter++ = '\0';
1115                                         name_context = delimiter;
1116                                 } else {
1117                                         mailbox = opts[OPT_ARG_NAME];
1118                                 }
1119                         }
1120                 }
1121         } else {
1122                 ast_clear_flag(&flags, AST_FLAGS_ALL);
1123         }
1124
1125         ast_format_copy(&oldwf, &chan->writeformat);
1126         if (ast_set_write_format_by_id(chan, AST_FORMAT_SLINEAR) < 0) {
1127                 ast_log(LOG_ERROR, "Could Not Set Write Format.\n");
1128                 return -1;
1129         }
1130
1131         if (recbase) {
1132                 char filename[PATH_MAX];
1133
1134                 snprintf(filename, sizeof(filename), "%s/%s.%d.raw", ast_config_AST_MONITOR_DIR, recbase, (int) time(NULL));
1135                 if ((fd = open(filename, O_CREAT | O_WRONLY | O_TRUNC, AST_FILE_MODE)) <= 0) {
1136                         ast_log(LOG_WARNING, "Cannot open '%s' for recording\n", filename);
1137                         fd = 0;
1138                 }
1139         }
1140
1141         res = common_exec(chan, &flags, volfactor, fd, &user_options, mygroup, myenforced, args.spec, NULL, NULL, mailbox, name_context);
1142
1143         if (fd)
1144                 close(fd);
1145
1146         if (oldwf.id && ast_set_write_format(chan, &oldwf) < 0)
1147                 ast_log(LOG_ERROR, "Could Not Set Write Format.\n");
1148
1149         if (ast_test_flag(&flags, OPTION_EXITONHANGUP)) {
1150                 ast_verb(3, "Stopped spying due to the spied-on channel hanging up.\n");
1151         }
1152
1153         return res;
1154 }
1155
1156 static int extenspy_exec(struct ast_channel *chan, const char *data)
1157 {
1158         char *ptr, *exten = NULL;
1159         char *mygroup = NULL;
1160         char *recbase = NULL;
1161         int fd = 0;
1162         struct ast_flags flags;
1163         struct spy_dtmf_options user_options = {
1164                 .cycle = '*',
1165                 .volume = '#',
1166                 .exit = '\0',
1167         };
1168         struct ast_format oldwf;
1169         int volfactor = 0;
1170         int res;
1171         char *mailbox = NULL;
1172         char *name_context = NULL;
1173         AST_DECLARE_APP_ARGS(args,
1174                 AST_APP_ARG(context);
1175                 AST_APP_ARG(options);
1176         );
1177         char *parse = ast_strdupa(data);
1178
1179         AST_STANDARD_APP_ARGS(args, parse);
1180         ast_format_clear(&oldwf);
1181
1182         if (!ast_strlen_zero(args.context) && (ptr = strchr(args.context, '@'))) {
1183                 exten = args.context;
1184                 *ptr++ = '\0';
1185                 args.context = ptr;
1186         }
1187         if (ast_strlen_zero(args.context))
1188                 args.context = ast_strdupa(chan->context);
1189
1190         if (args.options) {
1191                 char *opts[OPT_ARG_ARRAY_SIZE];
1192                 char tmp;
1193
1194                 ast_app_parse_options(spy_opts, &flags, opts, args.options);
1195                 if (ast_test_flag(&flags, OPTION_GROUP))
1196                         mygroup = opts[OPT_ARG_GROUP];
1197
1198                 if (ast_test_flag(&flags, OPTION_RECORD) &&
1199                         !(recbase = opts[OPT_ARG_RECORD]))
1200                         recbase = "chanspy";
1201
1202                 if (ast_test_flag(&flags, OPTION_DTMF_EXIT) && opts[OPT_ARG_EXIT]) {
1203                         tmp = opts[OPT_ARG_EXIT][0];
1204                         if (strchr("0123456789*#", tmp) && tmp != '\0') {
1205                                 user_options.exit = tmp;
1206                         } else {
1207                                 ast_log(LOG_NOTICE, "Argument for option 'x' must be a valid DTMF digit.");
1208                         }
1209                 }
1210
1211                 if (ast_test_flag(&flags, OPTION_DTMF_CYCLE) && opts[OPT_ARG_CYCLE]) {
1212                         tmp = opts[OPT_ARG_CYCLE][0];
1213                         if (strchr("0123456789*#", tmp) && tmp != '\0') {
1214                                 user_options.cycle = tmp;
1215                         } else {
1216                                 ast_log(LOG_NOTICE, "Argument for option 'c' must be a valid DTMF digit.");
1217                         }
1218                 }
1219
1220                 if (ast_test_flag(&flags, OPTION_VOLUME) && opts[OPT_ARG_VOLUME]) {
1221                         int vol;
1222
1223                         if ((sscanf(opts[OPT_ARG_VOLUME], "%30d", &vol) != 1) || (vol > 4) || (vol < -4))
1224                                 ast_log(LOG_NOTICE, "Volume factor must be a number between -4 and 4\n");
1225                         else
1226                                 volfactor = vol;
1227                 }
1228
1229                 if (ast_test_flag(&flags, OPTION_PRIVATE))
1230                         ast_set_flag(&flags, OPTION_WHISPER);
1231
1232                 if (ast_test_flag(&flags, OPTION_NAME)) {
1233                         if (!ast_strlen_zero(opts[OPT_ARG_NAME])) {
1234                                 char *delimiter;
1235                                 if ((delimiter = strchr(opts[OPT_ARG_NAME], '@'))) {
1236                                         mailbox = opts[OPT_ARG_NAME];
1237                                         *delimiter++ = '\0';
1238                                         name_context = delimiter;
1239                                 } else {
1240                                         mailbox = opts[OPT_ARG_NAME];
1241                                 }
1242                         }
1243                 }
1244
1245         } else {
1246                 ast_clear_flag(&flags, AST_FLAGS_ALL);
1247         }
1248
1249         oldwf = chan->writeformat;
1250         if (ast_set_write_format_by_id(chan, AST_FORMAT_SLINEAR) < 0) {
1251                 ast_log(LOG_ERROR, "Could Not Set Write Format.\n");
1252                 return -1;
1253         }
1254
1255         if (recbase) {
1256                 char filename[PATH_MAX];
1257
1258                 snprintf(filename, sizeof(filename), "%s/%s.%d.raw", ast_config_AST_MONITOR_DIR, recbase, (int) time(NULL));
1259                 if ((fd = open(filename, O_CREAT | O_WRONLY | O_TRUNC, AST_FILE_MODE)) <= 0) {
1260                         ast_log(LOG_WARNING, "Cannot open '%s' for recording\n", filename);
1261                         fd = 0;
1262                 }
1263         }
1264
1265
1266         res = common_exec(chan, &flags, volfactor, fd, &user_options, mygroup, NULL, NULL, exten, args.context, mailbox, name_context);
1267
1268         if (fd)
1269                 close(fd);
1270
1271         if (oldwf.id && ast_set_write_format(chan, &oldwf) < 0)
1272                 ast_log(LOG_ERROR, "Could Not Set Write Format.\n");
1273
1274         return res;
1275 }
1276
1277 static int dahdiscan_exec(struct ast_channel *chan, const char *data)
1278 {
1279         const char *spec = "DAHDI";
1280         struct ast_flags flags;
1281         struct spy_dtmf_options user_options = {
1282                 .cycle = '#',
1283                 .volume = '\0',
1284                 .exit = '*',
1285         };
1286         struct ast_format oldwf;
1287         int res;
1288         char *mygroup = NULL;
1289
1290         ast_clear_flag(&flags, AST_FLAGS_ALL);
1291         ast_format_clear(&oldwf);
1292         if (!ast_strlen_zero(data)) {
1293                 mygroup = ast_strdupa(data);
1294         }
1295         ast_set_flag(&flags, OPTION_DTMF_EXIT);
1296         ast_set_flag(&flags, OPTION_DTMF_CYCLE);
1297         ast_set_flag(&flags, OPTION_DAHDI_SCAN);
1298
1299         ast_format_copy(&oldwf, &chan->writeformat);
1300         if (ast_set_write_format_by_id(chan, AST_FORMAT_SLINEAR) < 0) {
1301                 ast_log(LOG_ERROR, "Could Not Set Write Format.\n");
1302                 return -1;
1303         }
1304
1305         res = common_exec(chan, &flags, 0, 0, &user_options, mygroup, NULL, spec, NULL, NULL, NULL, NULL);
1306
1307         if (oldwf.id && ast_set_write_format(chan, &oldwf) < 0)
1308                 ast_log(LOG_ERROR, "Could Not Set Write Format.\n");
1309
1310         return res;
1311 }
1312
1313 static int unload_module(void)
1314 {
1315         int res = 0;
1316
1317         res |= ast_unregister_application(app_chan);
1318         res |= ast_unregister_application(app_ext);
1319         res |= ast_unregister_application(app_dahdiscan);
1320
1321         return res;
1322 }
1323
1324 static int load_module(void)
1325 {
1326         int res = 0;
1327
1328         res |= ast_register_application_xml(app_chan, chanspy_exec);
1329         res |= ast_register_application_xml(app_ext, extenspy_exec);
1330         res |= ast_register_application_xml(app_dahdiscan, dahdiscan_exec);
1331
1332         return res;
1333 }
1334
1335 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Listen to the audio of an active channel");