Merged revisions 336500 via svnmerge from
[asterisk/asterisk.git] / channels / chan_h323.c
1 /*
2  * Asterisk -- An open source telephony toolkit.
3  *
4  * Copyright (C) 1999 - 2005
5  *
6  * OpenH323 Channel Driver for ASTERISK PBX.
7  *                      By Jeremy McNamara
8  *                      For The NuFone Network
9  *
10  * chan_h323 has been derived from code created by
11  *               Michael Manousos and Mark Spencer
12  *
13  * See http://www.asterisk.org for more information about
14  * the Asterisk project. Please do not directly contact
15  * any of the maintainers of this project for assistance;
16  * the project provides a web site, mailing lists and IRC
17  * channels for your use.
18  *
19  * This program is free software, distributed under the terms of
20  * the GNU General Public License Version 2. See the LICENSE file
21  * at the top of the source tree.
22  */
23
24 /*! \file
25  *
26  * \brief This file is part of the chan_h323 driver for Asterisk
27  *
28  * \author Jeremy McNamara
29  *
30  * \par See also
31  * \arg Config_h323
32  * \extref OpenH323 http://www.voxgratia.org/
33  *
34  * \ingroup channel_drivers
35  */
36
37 /*** MODULEINFO
38         <depend>openh323</depend>
39         <defaultenabled>no</defaultenabled>
40         <support_level>deprecated</support_level>
41         <replacement>chan_ooh323</replacement>
42  ***/
43
44 #ifdef __cplusplus
45 extern "C" {
46 #endif
47
48 #include "asterisk.h"
49
50 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
51
52 #ifdef __cplusplus
53 }
54 #endif
55
56 #include <sys/types.h>
57 #include <sys/socket.h>
58 #include <sys/signal.h>
59 #include <sys/param.h>
60 #include <arpa/inet.h>
61 #include <net/if.h>
62 #include <netinet/in.h>
63 #include <netinet/in_systm.h>
64 #include <netinet/ip.h>
65 #include <netdb.h>
66 #include <fcntl.h>
67
68 #ifdef __cplusplus
69 extern "C" {
70 #endif
71
72 #include "asterisk/lock.h"
73 #include "asterisk/channel.h"
74 #include "asterisk/config.h"
75 #include "asterisk/module.h"
76 #include "asterisk/musiconhold.h"
77 #include "asterisk/pbx.h"
78 #include "asterisk/utils.h"
79 #include "asterisk/sched.h"
80 #include "asterisk/io.h"
81 #include "asterisk/rtp_engine.h"
82 #include "asterisk/acl.h"
83 #include "asterisk/callerid.h"
84 #include "asterisk/cli.h"
85 #include "asterisk/dsp.h"
86 #include "asterisk/causes.h"
87 #include "asterisk/stringfields.h"
88 #include "asterisk/abstract_jb.h"
89 #include "asterisk/astobj.h"
90 #include "asterisk/format.h"
91 #include "asterisk/format_cap.h"
92
93 #ifdef __cplusplus
94 }
95 #endif
96
97 #undef open
98 #undef close
99 #include "h323/chan_h323.h"
100
101 receive_digit_cb on_receive_digit;
102 on_rtp_cb on_external_rtp_create;
103 start_rtp_cb on_start_rtp_channel;
104 setup_incoming_cb on_incoming_call;
105 setup_outbound_cb on_outgoing_call;
106 chan_ringing_cb on_chan_ringing;
107 con_established_cb on_connection_established;
108 clear_con_cb on_connection_cleared;
109 answer_call_cb on_answer_call;
110 progress_cb on_progress;
111 rfc2833_cb on_set_rfc2833_payload;
112 hangup_cb on_hangup;
113 setcapabilities_cb on_setcapabilities;
114 setpeercapabilities_cb on_setpeercapabilities;
115 onhold_cb on_hold;
116
117 int h323debug; /*!< global debug flag */
118
119 /*! \brief Global jitterbuffer configuration - by default, jb is disabled
120  *  \note Values shown here match the defaults shown in h323.conf.sample */
121 static struct ast_jb_conf default_jbconf =
122 {
123         .flags = 0,
124         .max_size = 200,
125         .resync_threshold = 1000,
126         .impl = "fixed",
127         .target_extra = 40,
128 };
129 static struct ast_jb_conf global_jbconf;
130
131 /** Variables required by Asterisk */
132 static const char tdesc[] = "The NuFone Network's Open H.323 Channel Driver";
133 static const char config[] = "h323.conf";
134 static char default_context[AST_MAX_CONTEXT] = "default";
135 static struct sockaddr_in bindaddr;
136
137 #define GLOBAL_CAPABILITY (ast_format_id_to_old_bitfield(AST_FORMAT_G723_1) | \
138         ast_format_id_to_old_bitfield(AST_FORMAT_GSM) | \
139         ast_format_id_to_old_bitfield(AST_FORMAT_ULAW) | \
140         ast_format_id_to_old_bitfield(AST_FORMAT_ALAW) | \
141         ast_format_id_to_old_bitfield(AST_FORMAT_G729A) | \
142         ast_format_id_to_old_bitfield(AST_FORMAT_G726_AAL2) | \
143         ast_format_id_to_old_bitfield(AST_FORMAT_H261)) \
144
145 /** H.323 configuration values */
146 static int h323_signalling_port = 1720;
147 static char gatekeeper[100];
148 static int gatekeeper_disable = 1;
149 static int gatekeeper_discover = 0;
150 static int gkroute = 0;
151 /* Find user by alias (h.323 id) is default, alternative is the incoming call's source IP address*/
152 static int userbyalias = 1;
153 static int acceptAnonymous = 1;
154 static unsigned int tos = 0;
155 static unsigned int cos = 0;
156 static char secret[50];
157 static unsigned int unique = 0;
158
159 static call_options_t global_options;
160
161 /*! \brief Private structure of a OpenH323 channel */
162 static struct oh323_pvt {
163         ast_mutex_t lock;                       /*!< Channel private lock */
164         call_options_t options;                 /*!<!< Options to be used during call setup */
165         int alreadygone;                        /*!< Whether or not we've already been destroyed by our peer */
166         int needdestroy;                        /*!< if we need to be destroyed */
167         call_details_t cd;                      /*!< Call details */
168         struct ast_channel *owner;              /*!< Who owns us */
169         struct sockaddr_in sa;                  /*!< Our peer */
170         struct sockaddr_in redirip;             /*!< Where our RTP should be going if not to us */
171         int nonCodecCapability;                 /*!< non-audio capability */
172         int outgoing;                           /*!< Outgoing or incoming call? */
173         char exten[AST_MAX_EXTENSION];          /*!< Requested extension */
174         char context[AST_MAX_CONTEXT];          /*!< Context where to start */
175         char accountcode[256];                  /*!< Account code */
176         char rdnis[80];                         /*!< Referring DNIS, if available */
177         int amaflags;                           /*!< AMA Flags */
178         struct ast_rtp_instance *rtp;           /*!< RTP Session */
179         struct ast_dsp *vad;                    /*!< Used for in-band DTMF detection */
180         int nativeformats;                      /*!< Codec formats supported by a channel */
181         int needhangup;                         /*!< Send hangup when Asterisk is ready */
182         int hangupcause;                        /*!< Hangup cause from OpenH323 layer */
183         int newstate;                           /*!< Pending state change */
184         int newcontrol;                         /*!< Pending control to send */
185         int newdigit;                           /*!< Pending DTMF digit to send */
186         int newduration;                        /*!< Pending DTMF digit duration to send */
187         h323_format pref_codec;                         /*!< Preferred codec */
188         h323_format peercapability;                     /*!< Capabilities learned from peer */
189         h323_format jointcapability;                    /*!< Common capabilities for local and remote side */
190         struct ast_codec_pref peer_prefs;       /*!< Preferenced list of codecs which remote side supports */
191         int dtmf_pt[2];                         /*!< Payload code used for RFC2833/CISCO messages */
192         int curDTMF;                            /*!< DTMF tone being generated to Asterisk side */
193         int DTMFsched;                          /*!< Scheduler descriptor for DTMF */
194         int update_rtp_info;                    /*!< Configuration of fd's array is pending */
195         int recvonly;                           /*!< Peer isn't wish to receive our voice stream */
196         int txDtmfDigit;                        /*!< DTMF digit being to send to H.323 side */
197         int noInbandDtmf;                       /*!< Inband DTMF processing by DSP isn't available */
198         int connection_established;             /*!< Call got CONNECT message */
199         int got_progress;                       /*!< Call got PROGRESS message, pass inband audio */
200         struct oh323_pvt *next;                 /*!< Next channel in list */
201 } *iflist = NULL;
202
203 /*! \brief H323 User list */
204 static struct h323_user_list {
205         ASTOBJ_CONTAINER_COMPONENTS(struct oh323_user);
206 } userl;
207
208 /*! \brief H323 peer list */
209 static struct h323_peer_list {
210         ASTOBJ_CONTAINER_COMPONENTS(struct oh323_peer);
211 } peerl;
212
213 /*! \brief H323 alias list */
214 static struct h323_alias_list {
215         ASTOBJ_CONTAINER_COMPONENTS(struct oh323_alias);
216 } aliasl;
217
218 /* Asterisk RTP stuff */
219 static struct ast_sched_context *sched;
220 static struct io_context *io;
221
222 AST_MUTEX_DEFINE_STATIC(iflock);        /*!< Protect the interface list (oh323_pvt) */
223
224 /*! \brief  Protect the H.323 monitoring thread, so only one process can kill or start it, and not
225    when it's doing something critical. */
226 AST_MUTEX_DEFINE_STATIC(monlock);
227
228 /*! \brief Protect the H.323 capabilities list, to avoid more than one channel to set the capabilities simultaneaously in the h323 stack. */
229 AST_MUTEX_DEFINE_STATIC(caplock);
230
231 /*! \brief Protect the reload process */
232 AST_MUTEX_DEFINE_STATIC(h323_reload_lock);
233 static int h323_reloading = 0;
234
235 /*! \brief This is the thread for the monitor which checks for input on the channels
236    which are not currently in use. */
237 static pthread_t monitor_thread = AST_PTHREADT_NULL;
238 static int restart_monitor(void);
239 static int h323_do_reload(void);
240
241 static void delete_users(void);
242 static void delete_aliases(void);
243 static void prune_peers(void);
244
245 static struct ast_channel *oh323_request(const char *type, struct ast_format_cap *cap, const struct ast_channel *requestor, void *data, int *cause);
246 static int oh323_digit_begin(struct ast_channel *c, char digit);
247 static int oh323_digit_end(struct ast_channel *c, char digit, unsigned int duration);
248 static int oh323_call(struct ast_channel *c, char *dest, int timeout);
249 static int oh323_hangup(struct ast_channel *c);
250 static int oh323_answer(struct ast_channel *c);
251 static struct ast_frame *oh323_read(struct ast_channel *c);
252 static int oh323_write(struct ast_channel *c, struct ast_frame *frame);
253 static int oh323_indicate(struct ast_channel *c, int condition, const void *data, size_t datalen);
254 static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
255
256 static struct ast_channel_tech oh323_tech = {
257         .type = "H323",
258         .description = tdesc,
259         .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER,
260         .requester = oh323_request,
261         .send_digit_begin = oh323_digit_begin,
262         .send_digit_end = oh323_digit_end,
263         .call = oh323_call,
264         .hangup = oh323_hangup,
265         .answer = oh323_answer,
266         .read = oh323_read,
267         .write = oh323_write,
268         .indicate = oh323_indicate,
269         .fixup = oh323_fixup,
270         .bridge = ast_rtp_instance_bridge,
271 };
272
273 static const char* redirectingreason2str(int redirectingreason)
274 {
275         switch (redirectingreason) {
276         case 0:
277                 return "UNKNOWN";
278         case 1:
279                 return "BUSY";
280         case 2:
281                 return "NO_REPLY";
282         case 0xF:
283                 return "UNCONDITIONAL";
284         default:
285                 return "NOREDIRECT";
286         }
287 }
288
289 static void oh323_destroy_alias(struct oh323_alias *alias)
290 {
291         if (h323debug)
292                 ast_debug(1, "Destroying alias '%s'\n", alias->name);
293         ast_free(alias);
294 }
295
296 static void oh323_destroy_user(struct oh323_user *user)
297 {
298         if (h323debug)
299                 ast_debug(1, "Destroying user '%s'\n", user->name);
300         ast_free_ha(user->ha);
301         ast_free(user);
302 }
303
304 static void oh323_destroy_peer(struct oh323_peer *peer)
305 {
306         if (h323debug)
307                 ast_debug(1, "Destroying peer '%s'\n", peer->name);
308         ast_free_ha(peer->ha);
309         ast_free(peer);
310 }
311
312 static int oh323_simulate_dtmf_end(const void *data)
313 {
314         struct oh323_pvt *pvt = (struct oh323_pvt *)data;
315
316         if (pvt) {
317                 ast_mutex_lock(&pvt->lock);
318                 /* Don't hold pvt lock while trying to lock the channel */
319                 while (pvt->owner && ast_channel_trylock(pvt->owner)) {
320                         DEADLOCK_AVOIDANCE(&pvt->lock);
321                 }
322
323                 if (pvt->owner) {
324                         struct ast_frame f = {
325                                 .frametype = AST_FRAME_DTMF_END,
326                                 .subclass.integer = pvt->curDTMF,
327                                 .samples = 0,
328                                 .src = "SIMULATE_DTMF_END",
329                         };
330                         ast_queue_frame(pvt->owner, &f);
331                         ast_channel_unlock(pvt->owner);
332                 }
333
334                 pvt->DTMFsched = -1;
335                 ast_mutex_unlock(&pvt->lock);
336         }
337
338         return 0;
339 }
340
341 /*! \brief Channel and private structures should be already locked */
342 static void __oh323_update_info(struct ast_channel *c, struct oh323_pvt *pvt)
343 {
344         h323_format chan_nativeformats_bits = ast_format_cap_to_old_bitfield(c->nativeformats);
345         if (chan_nativeformats_bits != pvt->nativeformats) {
346                 if (h323debug)
347                         ast_debug(1, "Preparing %s for new native format\n", c->name);
348                 ast_format_cap_from_old_bitfield(c->nativeformats, pvt->nativeformats);
349                 ast_set_read_format(c, &c->readformat);
350                 ast_set_write_format(c, &c->writeformat);
351         }
352         if (pvt->needhangup) {
353                 if (h323debug)
354                         ast_debug(1, "Process pending hangup for %s\n", c->name);
355                 c->_softhangup |= AST_SOFTHANGUP_DEV;
356                 c->hangupcause = pvt->hangupcause;
357                 ast_queue_hangup_with_cause(c, pvt->hangupcause);
358                 pvt->needhangup = 0;
359                 pvt->newstate = pvt->newcontrol = pvt->newdigit = pvt->DTMFsched = -1;
360         }
361         if (pvt->newstate >= 0) {
362                 ast_setstate(c, pvt->newstate);
363                 pvt->newstate = -1;
364         }
365         if (pvt->newcontrol >= 0) {
366                 ast_queue_control(c, pvt->newcontrol);
367                 pvt->newcontrol = -1;
368         }
369         if (pvt->newdigit >= 0) {
370                 struct ast_frame f = {
371                         .frametype = AST_FRAME_DTMF_END,
372                         .subclass.integer = pvt->newdigit,
373                         .samples = pvt->newduration * 8,
374                         .len = pvt->newduration,
375                         .src = "UPDATE_INFO",
376                 };
377                 if (pvt->newdigit == ' ') {             /* signalUpdate message */
378                         f.subclass.integer = pvt->curDTMF;
379                         if (pvt->DTMFsched >= 0) {
380                                 AST_SCHED_DEL(sched, pvt->DTMFsched);
381                         }
382                 } else {                                                /* Regular input or signal message */
383                         if (pvt->newduration) {         /* This is a signal, signalUpdate follows */
384                                 f.frametype = AST_FRAME_DTMF_BEGIN;
385                                 AST_SCHED_DEL(sched, pvt->DTMFsched);
386                                 pvt->DTMFsched = ast_sched_add(sched, pvt->newduration, oh323_simulate_dtmf_end, pvt);
387                                 if (h323debug)
388                                         ast_log(LOG_DTMF, "Scheduled DTMF END simulation for %d ms, id=%d\n", pvt->newduration, pvt->DTMFsched);
389                         }
390                         pvt->curDTMF = pvt->newdigit;
391                 }
392                 ast_queue_frame(c, &f);
393                 pvt->newdigit = -1;
394         }
395         if (pvt->update_rtp_info > 0) {
396                 if (pvt->rtp) {
397                         ast_jb_configure(c, &global_jbconf);
398                         ast_channel_set_fd(c, 0, ast_rtp_instance_fd(pvt->rtp, 0));
399                         ast_channel_set_fd(c, 1, ast_rtp_instance_fd(pvt->rtp, 1));
400                         ast_queue_frame(pvt->owner, &ast_null_frame);   /* Tell Asterisk to apply changes */
401                 }
402                 pvt->update_rtp_info = -1;
403         }
404 }
405
406 /*! \brief Only channel structure should be locked */
407 static void oh323_update_info(struct ast_channel *c)
408 {
409         struct oh323_pvt *pvt = c->tech_pvt;
410
411         if (pvt) {
412                 ast_mutex_lock(&pvt->lock);
413                 __oh323_update_info(c, pvt);
414                 ast_mutex_unlock(&pvt->lock);
415         }
416 }
417
418 static void cleanup_call_details(call_details_t *cd)
419 {
420         if (cd->call_token) {
421                 ast_free(cd->call_token);
422                 cd->call_token = NULL;
423         }
424         if (cd->call_source_aliases) {
425                 ast_free(cd->call_source_aliases);
426                 cd->call_source_aliases = NULL;
427         }
428         if (cd->call_dest_alias) {
429                 ast_free(cd->call_dest_alias);
430                 cd->call_dest_alias = NULL;
431         }
432         if (cd->call_source_name) {
433                 ast_free(cd->call_source_name);
434                 cd->call_source_name = NULL;
435         }
436         if (cd->call_source_e164) {
437                 ast_free(cd->call_source_e164);
438                 cd->call_source_e164 = NULL;
439         }
440         if (cd->call_dest_e164) {
441                 ast_free(cd->call_dest_e164);
442                 cd->call_dest_e164 = NULL;
443         }
444         if (cd->sourceIp) {
445                 ast_free(cd->sourceIp);
446                 cd->sourceIp = NULL;
447         }
448         if (cd->redirect_number) {
449                 ast_free(cd->redirect_number);
450                 cd->redirect_number = NULL;
451         }
452 }
453
454 static void __oh323_destroy(struct oh323_pvt *pvt)
455 {
456         struct oh323_pvt *cur, *prev = NULL;
457
458         AST_SCHED_DEL(sched, pvt->DTMFsched);
459
460         if (pvt->rtp) {
461                 ast_rtp_instance_destroy(pvt->rtp);
462         }
463
464         /* Free dsp used for in-band DTMF detection */
465         if (pvt->vad) {
466                 ast_dsp_free(pvt->vad);
467         }
468         cleanup_call_details(&pvt->cd);
469
470         /* Unlink us from the owner if we have one */
471         if (pvt->owner) {
472                 ast_channel_lock(pvt->owner);
473                 if (h323debug)
474                         ast_debug(1, "Detaching from %s\n", pvt->owner->name);
475                 pvt->owner->tech_pvt = NULL;
476                 ast_channel_unlock(pvt->owner);
477         }
478         cur = iflist;
479         while(cur) {
480                 if (cur == pvt) {
481                         if (prev)
482                                 prev->next = cur->next;
483                         else
484                                 iflist = cur->next;
485                         break;
486                 }
487                 prev = cur;
488                 cur = cur->next;
489         }
490         if (!cur) {
491                 ast_log(LOG_WARNING, "%p is not in list?!?! \n", cur);
492         } else {
493                 ast_mutex_unlock(&pvt->lock);
494                 ast_mutex_destroy(&pvt->lock);
495                 ast_free(pvt);
496         }
497 }
498
499 static void oh323_destroy(struct oh323_pvt *pvt)
500 {
501         if (h323debug) {
502                 ast_debug(1, "Destroying channel %s\n", (pvt->owner ? pvt->owner->name : "<unknown>"));
503         }
504         ast_mutex_lock(&iflock);
505         ast_mutex_lock(&pvt->lock);
506         __oh323_destroy(pvt);
507         ast_mutex_unlock(&iflock);
508 }
509
510 static int oh323_digit_begin(struct ast_channel *c, char digit)
511 {
512         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
513         char *token;
514
515         if (!pvt) {
516                 ast_log(LOG_ERROR, "No private structure?! This is bad\n");
517                 return -1;
518         }
519         ast_mutex_lock(&pvt->lock);
520         if (pvt->rtp &&
521                 (((pvt->options.dtmfmode & H323_DTMF_RFC2833) && pvt->dtmf_pt[0])
522                  /*|| ((pvt->options.dtmfmode & H323_DTMF_CISCO) && pvt->dtmf_pt[1]))*/)) {
523                 /* out-of-band DTMF */
524                 if (h323debug) {
525                         ast_log(LOG_DTMF, "Begin sending out-of-band digit %c on %s\n", digit, c->name);
526                 }
527                 ast_rtp_instance_dtmf_begin(pvt->rtp, digit);
528                 ast_mutex_unlock(&pvt->lock);
529         } else if (pvt->txDtmfDigit != digit) {
530                 /* in-band DTMF */
531                 if (h323debug) {
532                         ast_log(LOG_DTMF, "Begin sending inband digit %c on %s\n", digit, c->name);
533                 }
534                 pvt->txDtmfDigit = digit;
535                 token = pvt->cd.call_token ? ast_strdup(pvt->cd.call_token) : NULL;
536                 ast_mutex_unlock(&pvt->lock);
537                 h323_send_tone(token, digit);
538                 if (token) {
539                         ast_free(token);
540                 }
541         } else
542                 ast_mutex_unlock(&pvt->lock);
543         oh323_update_info(c);
544         return 0;
545 }
546
547 /*! \brief
548  * Send (play) the specified digit to the channel.
549  *
550  */
551 static int oh323_digit_end(struct ast_channel *c, char digit, unsigned int duration)
552 {
553         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
554         char *token;
555
556         if (!pvt) {
557                 ast_log(LOG_ERROR, "No private structure?! This is bad\n");
558                 return -1;
559         }
560         ast_mutex_lock(&pvt->lock);
561         if (pvt->rtp && (pvt->options.dtmfmode & H323_DTMF_RFC2833) && ((pvt->dtmf_pt[0] > 0) || (pvt->dtmf_pt[0] > 0))) {
562                 /* out-of-band DTMF */
563                 if (h323debug) {
564                         ast_log(LOG_DTMF, "End sending out-of-band digit %c on %s, duration %d\n", digit, c->name, duration);
565                 }
566                 ast_rtp_instance_dtmf_end(pvt->rtp, digit);
567                 ast_mutex_unlock(&pvt->lock);
568         } else {
569                 /* in-band DTMF */
570                 if (h323debug) {
571                         ast_log(LOG_DTMF, "End sending inband digit %c on %s, duration %d\n", digit, c->name, duration);
572                 }
573                 pvt->txDtmfDigit = ' ';
574                 token = pvt->cd.call_token ? ast_strdup(pvt->cd.call_token) : NULL;
575                 ast_mutex_unlock(&pvt->lock);
576                 h323_send_tone(token, ' ');
577                 if (token) {
578                         ast_free(token);
579                 }
580         }
581         oh323_update_info(c);
582         return 0;
583 }
584
585 /*! \brief
586  * Make a call over the specified channel to the specified
587  * destination.
588  * Returns -1 on error, 0 on success.
589  */
590 static int oh323_call(struct ast_channel *c, char *dest, int timeout)
591 {
592         int res = 0;
593         struct oh323_pvt *pvt = (struct oh323_pvt *)c->tech_pvt;
594         const char *addr;
595         char called_addr[1024];
596
597         if (h323debug) {
598                 ast_debug(1, "Calling to %s on %s\n", dest, c->name);
599         }
600         if ((c->_state != AST_STATE_DOWN) && (c->_state != AST_STATE_RESERVED)) {
601                 ast_log(LOG_WARNING, "Line is already in use (%s)\n", c->name);
602                 return -1;
603         }
604         ast_mutex_lock(&pvt->lock);
605         if (!gatekeeper_disable) {
606                 if (ast_strlen_zero(pvt->exten)) {
607                         ast_copy_string(called_addr, dest, sizeof(called_addr));
608                 } else {
609                         snprintf(called_addr, sizeof(called_addr), "%s@%s", pvt->exten, dest);
610                 }
611         } else {
612                 res = htons(pvt->sa.sin_port);
613                 addr = ast_inet_ntoa(pvt->sa.sin_addr);
614                 if (ast_strlen_zero(pvt->exten)) {
615                         snprintf(called_addr, sizeof(called_addr), "%s:%d", addr, res);
616                 } else {
617                         snprintf(called_addr, sizeof(called_addr), "%s@%s:%d", pvt->exten, addr, res);
618                 }
619         }
620         /* make sure null terminated */
621         called_addr[sizeof(called_addr) - 1] = '\0';
622
623         if (c->connected.id.number.valid && c->connected.id.number.str) {
624                 ast_copy_string(pvt->options.cid_num, c->connected.id.number.str, sizeof(pvt->options.cid_num));
625         }
626
627         if (c->connected.id.name.valid && c->connected.id.name.str) {
628                 ast_copy_string(pvt->options.cid_name, c->connected.id.name.str, sizeof(pvt->options.cid_name));
629         }
630
631         if (c->redirecting.from.number.valid && c->redirecting.from.number.str) {
632                 ast_copy_string(pvt->options.cid_rdnis, c->redirecting.from.number.str, sizeof(pvt->options.cid_rdnis));
633         }
634
635         pvt->options.presentation = ast_party_id_presentation(&c->connected.id);
636         pvt->options.type_of_number = c->connected.id.number.plan;
637
638         if ((addr = pbx_builtin_getvar_helper(c, "PRIREDIRECTREASON"))) {
639                 if (!strcasecmp(addr, "UNKNOWN"))
640                         pvt->options.redirect_reason = 0;
641                 else if (!strcasecmp(addr, "BUSY"))
642                         pvt->options.redirect_reason = 1;
643                 else if (!strcasecmp(addr, "NO_REPLY"))
644                         pvt->options.redirect_reason = 2;
645                 else if (!strcasecmp(addr, "UNCONDITIONAL"))
646                         pvt->options.redirect_reason = 15;
647                 else
648                         pvt->options.redirect_reason = -1;
649         } else
650                 pvt->options.redirect_reason = -1;
651
652         pvt->options.transfer_capability = c->transfercapability;
653
654         /* indicate that this is an outgoing call */
655         pvt->outgoing = 1;
656
657         ast_verb(3, "Requested transfer capability: 0x%.2x - %s\n", c->transfercapability, ast_transfercapability2str(c->transfercapability));
658         if (h323debug)
659                 ast_debug(1, "Placing outgoing call to %s, %d/%d\n", called_addr, pvt->options.dtmfcodec[0], pvt->options.dtmfcodec[1]);
660         ast_mutex_unlock(&pvt->lock);
661         res = h323_make_call(called_addr, &(pvt->cd), &pvt->options);
662         if (res) {
663                 ast_log(LOG_NOTICE, "h323_make_call failed(%s)\n", c->name);
664                 return -1;
665         }
666         oh323_update_info(c);
667         return 0;
668 }
669
670 static int oh323_answer(struct ast_channel *c)
671 {
672         int res;
673         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
674         char *token;
675
676         if (h323debug)
677                 ast_debug(1, "Answering on %s\n", c->name);
678
679         ast_mutex_lock(&pvt->lock);
680         token = pvt->cd.call_token ? ast_strdup(pvt->cd.call_token) : NULL;
681         ast_mutex_unlock(&pvt->lock);
682         res = h323_answering_call(token, 0);
683         if (token)
684                 ast_free(token);
685
686         oh323_update_info(c);
687         if (c->_state != AST_STATE_UP) {
688                 ast_setstate(c, AST_STATE_UP);
689         }
690         return res;
691 }
692
693 static int oh323_hangup(struct ast_channel *c)
694 {
695         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
696         int q931cause = AST_CAUSE_NORMAL_CLEARING;
697         char *call_token;
698
699
700         if (h323debug)
701                 ast_debug(1, "Hanging up and scheduling destroy of call %s\n", c->name);
702
703         if (!c->tech_pvt) {
704                 ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
705                 return 0;
706         }
707         ast_mutex_lock(&pvt->lock);
708         /* Determine how to disconnect */
709         if (pvt->owner != c) {
710                 ast_log(LOG_WARNING, "Huh?  We aren't the owner?\n");
711                 ast_mutex_unlock(&pvt->lock);
712                 return 0;
713         }
714
715         pvt->owner = NULL;
716         c->tech_pvt = NULL;
717
718         if (c->hangupcause) {
719                 q931cause = c->hangupcause;
720         } else {
721                 const char *cause = pbx_builtin_getvar_helper(c, "DIALSTATUS");
722                 if (cause) {
723                         if (!strcmp(cause, "CONGESTION")) {
724                                 q931cause = AST_CAUSE_NORMAL_CIRCUIT_CONGESTION;
725                         } else if (!strcmp(cause, "BUSY")) {
726                                 q931cause = AST_CAUSE_USER_BUSY;
727                         } else if (!strcmp(cause, "CHANISUNVAIL")) {
728                                 q931cause = AST_CAUSE_REQUESTED_CHAN_UNAVAIL;
729                         } else if (!strcmp(cause, "NOANSWER")) {
730                                 q931cause = AST_CAUSE_NO_ANSWER;
731                         } else if (!strcmp(cause, "CANCEL")) {
732                                 q931cause = AST_CAUSE_CALL_REJECTED;
733                         }
734                 }
735         }
736
737         /* Start the process if it's not already started */
738         if (!pvt->alreadygone && !pvt->hangupcause) {
739                 call_token = pvt->cd.call_token ? ast_strdup(pvt->cd.call_token) : NULL;
740                 if (call_token) {
741                         /* Release lock to eliminate deadlock */
742                         ast_mutex_unlock(&pvt->lock);
743                         if (h323_clear_call(call_token, q931cause)) {
744                                 ast_log(LOG_WARNING, "ClearCall failed.\n");
745                         }
746                         ast_free(call_token);
747                         ast_mutex_lock(&pvt->lock);
748                 }
749         }
750         pvt->needdestroy = 1;
751         ast_mutex_unlock(&pvt->lock);
752
753         /* Update usage counter */
754         ast_module_unref(ast_module_info->self);
755
756         return 0;
757 }
758
759 /*! \brief Retrieve audio/etc from channel. Assumes pvt->lock is already held. */
760 static struct ast_frame *oh323_rtp_read(struct oh323_pvt *pvt)
761 {
762         struct ast_frame *f;
763
764         /* Only apply it for the first packet, we just need the correct ip/port */
765         if (pvt->options.nat) {
766                 ast_rtp_instance_set_prop(pvt->rtp, AST_RTP_PROPERTY_NAT, pvt->options.nat);
767                 pvt->options.nat = 0;
768         }
769
770         f = ast_rtp_instance_read(pvt->rtp, 0);
771         /* Don't send RFC2833 if we're not supposed to */
772         if (f && (f->frametype == AST_FRAME_DTMF) && !(pvt->options.dtmfmode & (H323_DTMF_RFC2833 | H323_DTMF_CISCO))) {
773                 return &ast_null_frame;
774         }
775         if (pvt->owner) {
776                 /* We already hold the channel lock */
777                 if (f->frametype == AST_FRAME_VOICE) {
778                         if (!ast_format_cap_iscompatible(pvt->owner->nativeformats, &f->subclass.format)) {
779                                 /* Try to avoid deadlock */
780                                 if (ast_channel_trylock(pvt->owner)) {
781                                         ast_log(LOG_NOTICE, "Format changed but channel is locked. Ignoring frame...\n");
782                                         return &ast_null_frame;
783                                 }
784                                 if (h323debug)
785                                         ast_debug(1, "Oooh, format changed to '%s'\n", ast_getformatname(&f->subclass.format));
786                                 ast_format_cap_set(pvt->owner->nativeformats, &f->subclass.format);
787
788                                 pvt->nativeformats = ast_format_to_old_bitfield(&f->subclass.format);
789
790                                 ast_set_read_format(pvt->owner, &pvt->owner->readformat);
791                                 ast_set_write_format(pvt->owner, &pvt->owner->writeformat);
792                                 ast_channel_unlock(pvt->owner);
793                         }
794                         /* Do in-band DTMF detection */
795                         if ((pvt->options.dtmfmode & H323_DTMF_INBAND) && pvt->vad) {
796                                 if ((pvt->nativeformats & (AST_FORMAT_SLINEAR | AST_FORMAT_ALAW | AST_FORMAT_ULAW))) {
797                                         if (!ast_channel_trylock(pvt->owner)) {
798                                                 f = ast_dsp_process(pvt->owner, pvt->vad, f);
799                                                 ast_channel_unlock(pvt->owner);
800                                         }
801                                         else
802                                                 ast_log(LOG_NOTICE, "Unable to process inband DTMF while channel is locked\n");
803                                 } else if (pvt->nativeformats && !pvt->noInbandDtmf) {
804                                         ast_log(LOG_NOTICE, "Inband DTMF is not supported on codec %s. Use RFC2833\n", ast_getformatname(&f->subclass.format));
805                                         pvt->noInbandDtmf = 1;
806                                 }
807                                 if (f &&(f->frametype == AST_FRAME_DTMF)) {
808                                         if (h323debug)
809                                                 ast_log(LOG_DTMF, "Received in-band digit %c.\n", f->subclass.integer);
810                                 }
811                         }
812                 }
813         }
814         return f;
815 }
816
817 static struct ast_frame *oh323_read(struct ast_channel *c)
818 {
819         struct ast_frame *fr;
820         struct oh323_pvt *pvt = (struct oh323_pvt *)c->tech_pvt;
821         ast_mutex_lock(&pvt->lock);
822         __oh323_update_info(c, pvt);
823         switch(c->fdno) {
824         case 0:
825                 fr = oh323_rtp_read(pvt);
826                 break;
827         case 1:
828                 if (pvt->rtp)
829                         fr = ast_rtp_instance_read(pvt->rtp, 1);
830                 else
831                         fr = &ast_null_frame;
832                 break;
833         default:
834                 ast_log(LOG_ERROR, "Unable to handle fd %d on channel %s\n", c->fdno, c->name);
835                 fr = &ast_null_frame;
836                 break;
837         }
838         ast_mutex_unlock(&pvt->lock);
839         return fr;
840 }
841
842 static int oh323_write(struct ast_channel *c, struct ast_frame *frame)
843 {
844         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
845         int res = 0;
846         if (frame->frametype != AST_FRAME_VOICE) {
847                 if (frame->frametype == AST_FRAME_IMAGE) {
848                         return 0;
849                 } else {
850                         ast_log(LOG_WARNING, "Can't send %d type frames with H323 write\n", frame->frametype);
851                         return 0;
852                 }
853         } else {
854                 if (!(ast_format_cap_iscompatible(c->nativeformats, &frame->subclass.format))) {
855                         char tmp[256];
856                         ast_log(LOG_WARNING, "Asked to transmit frame type '%s', while native formats is '%s' (read/write = %s/%s)\n",
857                                 ast_getformatname(&frame->subclass.format), ast_getformatname_multiple(tmp, sizeof(tmp), c->nativeformats), ast_getformatname(&c->readformat), ast_getformatname(&c->writeformat));
858                         return 0;
859                 }
860         }
861         if (pvt) {
862                 ast_mutex_lock(&pvt->lock);
863                 if (pvt->rtp && !pvt->recvonly)
864                         res = ast_rtp_instance_write(pvt->rtp, frame);
865                 __oh323_update_info(c, pvt);
866                 ast_mutex_unlock(&pvt->lock);
867         }
868         return res;
869 }
870
871 static int oh323_indicate(struct ast_channel *c, int condition, const void *data, size_t datalen)
872 {
873
874         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
875         char *token = (char *)NULL;
876         int res = -1;
877         int got_progress;
878
879         ast_mutex_lock(&pvt->lock);
880         token = (pvt->cd.call_token ? ast_strdup(pvt->cd.call_token) : NULL);
881         got_progress = pvt->got_progress;
882         if (condition == AST_CONTROL_PROGRESS)
883                 pvt->got_progress = 1;
884         else if ((condition == AST_CONTROL_BUSY) || (condition == AST_CONTROL_CONGESTION))
885                 pvt->alreadygone = 1;
886         ast_mutex_unlock(&pvt->lock);
887
888         if (h323debug)
889                 ast_debug(1, "OH323: Indicating %d on %s (%s)\n", condition, token, c->name);
890
891         switch(condition) {
892         case AST_CONTROL_RINGING:
893                 if (c->_state == AST_STATE_RING || c->_state == AST_STATE_RINGING) {
894                         h323_send_alerting(token);
895                         res = (got_progress ? 0 : -1);  /* Do not simulate any audio tones if we got PROGRESS message */
896                 }
897                 break;
898         case AST_CONTROL_PROGRESS:
899                 if (c->_state != AST_STATE_UP) {
900                         /* Do not send PROGRESS message more than once */
901                         if (!got_progress)
902                                 h323_send_progress(token);
903                         res = 0;
904                 }
905                 break;
906         case AST_CONTROL_BUSY:
907                 if (c->_state != AST_STATE_UP) {
908                         h323_answering_call(token, 1);
909                         ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV);
910                         res = 0;
911                 }
912                 break;
913         case AST_CONTROL_INCOMPLETE:
914                 /* While h323 does support overlapped dialing, this channel driver does not
915                  * at this time.  Treat a response of Incomplete as if it were congestion.
916                  */
917         case AST_CONTROL_CONGESTION:
918                 if (c->_state != AST_STATE_UP) {
919                         h323_answering_call(token, 1);
920                         ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV);
921                         res = 0;
922                 }
923                 break;
924         case AST_CONTROL_HOLD:
925                 h323_hold_call(token, 1);
926                 /* We should start MOH only if remote party isn't provide audio for us */
927                 ast_moh_start(c, data, NULL);
928                 res = 0;
929                 break;
930         case AST_CONTROL_UNHOLD:
931                 h323_hold_call(token, 0);
932                 ast_moh_stop(c);
933                 res = 0;
934                 break;
935         case AST_CONTROL_SRCUPDATE:
936                 ast_rtp_instance_update_source(pvt->rtp);
937                 res = 0;
938                 break;
939         case AST_CONTROL_SRCCHANGE:
940                 ast_rtp_instance_change_source(pvt->rtp);
941                 res = 0;
942                 break;
943         case AST_CONTROL_PROCEEDING:
944         case -1:
945                 break;
946         default:
947                 ast_log(LOG_WARNING, "OH323: Don't know how to indicate condition %d on %s\n", condition, token);
948                 break;
949         }
950
951         if (h323debug)
952                 ast_debug(1, "OH323: Indicated %d on %s, res=%d\n", condition, token, res);
953         if (token)
954                 ast_free(token);
955         oh323_update_info(c);
956
957         return res;
958 }
959
960 static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
961 {
962         struct oh323_pvt *pvt = (struct oh323_pvt *) newchan->tech_pvt;
963
964         ast_mutex_lock(&pvt->lock);
965         if (pvt->owner != oldchan) {
966                 ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, pvt->owner);
967                 return -1;
968         }
969         pvt->owner = newchan;
970         ast_mutex_unlock(&pvt->lock);
971         return 0;
972 }
973
974 static int __oh323_rtp_create(struct oh323_pvt *pvt)
975 {
976         struct ast_sockaddr our_addr;
977
978         if (pvt->rtp)
979                 return 0;
980
981         {
982                 struct ast_sockaddr tmp;
983
984                 ast_sockaddr_from_sin(&tmp, &bindaddr);
985                 if (ast_find_ourip(&our_addr, &tmp, AF_INET)) {
986                         ast_mutex_unlock(&pvt->lock);
987                         ast_log(LOG_ERROR, "Unable to locate local IP address for RTP stream\n");
988                         return -1;
989                 }
990         }
991         our_addr.ss.ss_family = AF_INET;
992         pvt->rtp = ast_rtp_instance_new("asterisk", sched, &our_addr, NULL);
993         if (!pvt->rtp) {
994                 ast_mutex_unlock(&pvt->lock);
995                 ast_log(LOG_WARNING, "Unable to create RTP session: %s\n", strerror(errno));
996                 return -1;
997         }
998         if (h323debug)
999                 ast_debug(1, "Created RTP channel\n");
1000
1001         ast_rtp_instance_set_qos(pvt->rtp, tos, cos, "H323 RTP");
1002
1003         if (h323debug)
1004                 ast_debug(1, "Setting NAT on RTP to %d\n", pvt->options.nat);
1005         ast_rtp_instance_set_prop(pvt->rtp, AST_RTP_PROPERTY_NAT, pvt->options.nat);
1006
1007         if (pvt->dtmf_pt[0] > 0)
1008                 ast_rtp_codecs_payloads_set_rtpmap_type(ast_rtp_instance_get_codecs(pvt->rtp), pvt->rtp, pvt->dtmf_pt[0], "audio", "telephone-event", 0);
1009         if (pvt->dtmf_pt[1] > 0)
1010                 ast_rtp_codecs_payloads_set_rtpmap_type(ast_rtp_instance_get_codecs(pvt->rtp), pvt->rtp, pvt->dtmf_pt[1], "audio", "cisco-telephone-event", 0);
1011
1012         if (pvt->peercapability)
1013                 ast_rtp_codecs_packetization_set(ast_rtp_instance_get_codecs(pvt->rtp), pvt->rtp, &pvt->peer_prefs);
1014
1015         if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
1016                 ast_jb_configure(pvt->owner, &global_jbconf);
1017                 ast_channel_set_fd(pvt->owner, 0, ast_rtp_instance_fd(pvt->rtp, 0));
1018                 ast_channel_set_fd(pvt->owner, 1, ast_rtp_instance_fd(pvt->rtp, 1));
1019                 ast_queue_frame(pvt->owner, &ast_null_frame);   /* Tell Asterisk to apply changes */
1020                 ast_channel_unlock(pvt->owner);
1021         } else
1022                 pvt->update_rtp_info = 1;
1023
1024         return 0;
1025 }
1026
1027 /*! \brief Private structure should be locked on a call */
1028 static struct ast_channel *__oh323_new(struct oh323_pvt *pvt, int state, const char *host, const char *linkedid)
1029 {
1030         struct ast_channel *ch;
1031         char *cid_num, *cid_name;
1032         h323_format fmt;
1033         struct ast_format tmpfmt;
1034
1035         if (!ast_strlen_zero(pvt->options.cid_num))
1036                 cid_num = pvt->options.cid_num;
1037         else
1038                 cid_num = pvt->cd.call_source_e164;
1039
1040         if (!ast_strlen_zero(pvt->options.cid_name))
1041                 cid_name = pvt->options.cid_name;
1042         else
1043                 cid_name = pvt->cd.call_source_name;
1044         
1045         /* Don't hold a oh323_pvt lock while we allocate a chanel */
1046         ast_mutex_unlock(&pvt->lock);
1047         ch = ast_channel_alloc(1, state, cid_num, cid_name, pvt->accountcode, pvt->exten, pvt->context, linkedid, pvt->amaflags, "H323/%s", host);
1048         /* Update usage counter */
1049         ast_module_ref(ast_module_info->self);
1050         ast_mutex_lock(&pvt->lock);
1051         if (ch) {
1052                 ch->tech = &oh323_tech;
1053                 if (!(fmt = pvt->jointcapability) && !(fmt = pvt->options.capability))
1054                         fmt = global_options.capability;
1055
1056                 ast_format_cap_from_old_bitfield(ch->nativeformats, fmt);
1057                 ast_codec_choose(&pvt->options.prefs, ch->nativeformats, 1, &tmpfmt)/* | (pvt->jointcapability & AST_FORMAT_VIDEO_MASK)*/;
1058
1059                 ast_format_cap_set(ch->nativeformats, &tmpfmt);
1060
1061                 pvt->nativeformats = ast_format_cap_to_old_bitfield(ch->nativeformats);
1062                 ast_best_codec(ch->nativeformats, &tmpfmt);
1063                 ast_format_copy(&ch->writeformat, &tmpfmt);
1064                 ast_format_copy(&ch->rawwriteformat, &tmpfmt);
1065                 ast_format_copy(&ch->readformat, &tmpfmt);
1066                 ast_format_copy(&ch->rawreadformat, &tmpfmt);
1067                 if (!pvt->rtp)
1068                         __oh323_rtp_create(pvt);
1069 #if 0
1070                 ast_channel_set_fd(ch, 0, ast_rtp_instance_fd(pvt->rtp, 0));
1071                 ast_channel_set_fd(ch, 1, ast_rtp_instance_fd(pvt->rtp, 1));
1072 #endif
1073 #ifdef VIDEO_SUPPORT
1074                 if (pvt->vrtp) {
1075                         ast_channel_set_fd(ch, 2, ast_rtp_instance_fd(pvt->vrtp, 0));
1076                         ast_channel_set_fd(ch, 3, ast_rtp_instance_fd(pvt->vrtp, 1));
1077                 }
1078 #endif
1079 #ifdef T38_SUPPORT
1080                 if (pvt->udptl) {
1081                         ast_channel_set_fd(ch, 4, ast_udptl_fd(pvt->udptl));
1082                 }
1083 #endif
1084                 if (state == AST_STATE_RING) {
1085                         ch->rings = 1;
1086                 }
1087                 /* Allocate dsp for in-band DTMF support */
1088                 if (pvt->options.dtmfmode & H323_DTMF_INBAND) {
1089                         pvt->vad = ast_dsp_new();
1090                         ast_dsp_set_features(pvt->vad, DSP_FEATURE_DIGIT_DETECT);
1091                 }
1092                 /* Register channel functions. */
1093                 ch->tech_pvt = pvt;
1094                 /* Set the owner of this channel */
1095                 pvt->owner = ch;
1096
1097                 ast_copy_string(ch->context, pvt->context, sizeof(ch->context));
1098                 ast_copy_string(ch->exten, pvt->exten, sizeof(ch->exten));
1099                 ch->priority = 1;
1100                 if (!ast_strlen_zero(pvt->accountcode)) {
1101                         ast_string_field_set(ch, accountcode, pvt->accountcode);
1102                 }
1103                 if (pvt->amaflags) {
1104                         ch->amaflags = pvt->amaflags;
1105                 }
1106
1107                 /* Don't use ast_set_callerid() here because it will
1108                  * generate a needless NewCallerID event */
1109                 if (!ast_strlen_zero(cid_num)) {
1110                         ch->caller.ani.number.valid = 1;
1111                         ch->caller.ani.number.str = ast_strdup(cid_num);
1112                 }
1113
1114                 if (pvt->cd.redirect_reason >= 0) {
1115                         ch->redirecting.from.number.valid = 1;
1116                         ch->redirecting.from.number.str = ast_strdup(pvt->cd.redirect_number);
1117                         pbx_builtin_setvar_helper(ch, "PRIREDIRECTREASON", redirectingreason2str(pvt->cd.redirect_reason));
1118                 }
1119                 ch->caller.id.name.presentation = pvt->cd.presentation;
1120                 ch->caller.id.number.presentation = pvt->cd.presentation;
1121                 ch->caller.id.number.plan = pvt->cd.type_of_number;
1122
1123                 if (!ast_strlen_zero(pvt->exten) && strcmp(pvt->exten, "s")) {
1124                         ch->dialed.number.str = ast_strdup(pvt->exten);
1125                 }
1126                 if (pvt->cd.transfer_capability >= 0)
1127                         ch->transfercapability = pvt->cd.transfer_capability;
1128                 if (state != AST_STATE_DOWN) {
1129                         if (ast_pbx_start(ch)) {
1130                                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", ch->name);
1131                                 ast_hangup(ch);
1132                                 ch = NULL;
1133                         }
1134                 }
1135         } else {
1136                 ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
1137         }
1138         return ch;
1139 }
1140
1141 static struct oh323_pvt *oh323_alloc(int callid)
1142 {
1143         struct oh323_pvt *pvt;
1144
1145         pvt = ast_calloc(1, sizeof(*pvt));
1146         if (!pvt) {
1147                 ast_log(LOG_ERROR, "Couldn't allocate private structure. This is bad\n");
1148                 return NULL;
1149         }
1150         pvt->cd.redirect_reason = -1;
1151         pvt->cd.transfer_capability = -1;
1152         /* Ensure the call token is allocated for outgoing call */
1153         if (!callid) {
1154                 if ((pvt->cd).call_token == NULL) {
1155                         (pvt->cd).call_token = ast_calloc(1, 128);
1156                 }
1157                 if (!pvt->cd.call_token) {
1158                         ast_log(LOG_ERROR, "Not enough memory to alocate call token\n");
1159                         ast_rtp_instance_destroy(pvt->rtp);
1160                         ast_free(pvt);
1161                         return NULL;
1162                 }
1163                 memset((char *)(pvt->cd).call_token, 0, 128);
1164                 pvt->cd.call_reference = callid;
1165         }
1166         memcpy(&pvt->options, &global_options, sizeof(pvt->options));
1167         pvt->jointcapability = pvt->options.capability;
1168         if (pvt->options.dtmfmode & (H323_DTMF_RFC2833 | H323_DTMF_CISCO)) {
1169                 pvt->nonCodecCapability |= AST_RTP_DTMF;
1170         } else {
1171                 pvt->nonCodecCapability &= ~AST_RTP_DTMF;
1172         }
1173         ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
1174         pvt->newstate = pvt->newcontrol = pvt->newdigit = pvt->update_rtp_info = pvt->DTMFsched = -1;
1175         ast_mutex_init(&pvt->lock);
1176         /* Add to interface list */
1177         ast_mutex_lock(&iflock);
1178         pvt->next = iflist;
1179         iflist = pvt;
1180         ast_mutex_unlock(&iflock);
1181         return pvt;
1182 }
1183
1184 static struct oh323_pvt *find_call_locked(int call_reference, const char *token)
1185 {
1186         struct oh323_pvt *pvt;
1187
1188         ast_mutex_lock(&iflock);
1189         pvt = iflist;
1190         while(pvt) {
1191                 if (!pvt->needdestroy && ((signed int)pvt->cd.call_reference == call_reference)) {
1192                         /* Found the call */
1193                         if ((token != NULL) && (pvt->cd.call_token != NULL) && (!strcmp(pvt->cd.call_token, token))) {
1194                                 ast_mutex_lock(&pvt->lock);
1195                                 ast_mutex_unlock(&iflock);
1196                                 return pvt;
1197                         } else if (token == NULL) {
1198                                 ast_log(LOG_WARNING, "Call Token is NULL\n");
1199                                 ast_mutex_lock(&pvt->lock);
1200                                 ast_mutex_unlock(&iflock);
1201                                 return pvt;
1202                         }
1203                 }
1204                 pvt = pvt->next;
1205         }
1206         ast_mutex_unlock(&iflock);
1207         return NULL;
1208 }
1209
1210 static int update_state(struct oh323_pvt *pvt, int state, int signal)
1211 {
1212         if (!pvt)
1213                 return 0;
1214         if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
1215                 if (state >= 0)
1216                         ast_setstate(pvt->owner, state);
1217                 if (signal >= 0)
1218                         ast_queue_control(pvt->owner, signal);
1219                 ast_channel_unlock(pvt->owner);
1220                 return 1;
1221         }
1222         else {
1223                 if (state >= 0)
1224                         pvt->newstate = state;
1225                 if (signal >= 0)
1226                         pvt->newcontrol = signal;
1227                 return 0;
1228         }
1229 }
1230
1231 static struct oh323_alias *build_alias(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
1232 {
1233         struct oh323_alias *alias;
1234         int found = 0;
1235
1236         alias = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&aliasl, name, name, 0, 0, strcasecmp);
1237
1238         if (alias)
1239                 found++;
1240         else {
1241                 if (!(alias = ast_calloc(1, sizeof(*alias))))
1242                         return NULL;
1243                 ASTOBJ_INIT(alias);
1244         }
1245         if (!found && name)
1246                 ast_copy_string(alias->name, name, sizeof(alias->name));
1247         for (; v || ((v = alt) && !(alt = NULL)); v = v->next) {
1248                 if (!strcasecmp(v->name, "e164")) {
1249                         ast_copy_string(alias->e164, v->value, sizeof(alias->e164));
1250                 } else if (!strcasecmp(v->name, "prefix")) {
1251                         ast_copy_string(alias->prefix, v->value, sizeof(alias->prefix));
1252                 } else if (!strcasecmp(v->name, "context")) {
1253                         ast_copy_string(alias->context, v->value, sizeof(alias->context));
1254                 } else if (!strcasecmp(v->name, "secret")) {
1255                         ast_copy_string(alias->secret, v->value, sizeof(alias->secret));
1256                 } else {
1257                         if (strcasecmp(v->value, "h323")) {
1258                                 ast_log(LOG_WARNING, "Keyword %s does not make sense in type=h323\n", v->name);
1259                         }
1260                 }
1261         }
1262         ASTOBJ_UNMARK(alias);
1263         return alias;
1264 }
1265
1266 static struct oh323_alias *realtime_alias(const char *alias)
1267 {
1268         struct ast_variable *var, *tmp;
1269         struct oh323_alias *a;
1270
1271         var = ast_load_realtime("h323", "name", alias, SENTINEL);
1272
1273         if (!var)
1274                 return NULL;
1275
1276         for (tmp = var; tmp; tmp = tmp->next) {
1277                 if (!strcasecmp(tmp->name, "type") &&
1278                 !(!strcasecmp(tmp->value, "alias") || !strcasecmp(tmp->value, "h323"))) {
1279                         ast_variables_destroy(var);
1280                         return NULL;
1281                 }
1282         }
1283
1284         a = build_alias(alias, var, NULL, 1);
1285
1286         ast_variables_destroy(var);
1287
1288         return a;
1289 }
1290
1291 static int h323_parse_allow_disallow(struct ast_codec_pref *pref, h323_format *formats, const char *list, int allowing)
1292 {
1293         int res;
1294         struct ast_format_cap *cap = ast_format_cap_alloc_nolock();
1295         if (!cap) {
1296                 return 1;
1297         }
1298
1299         ast_format_cap_from_old_bitfield(cap, *formats);
1300         res = ast_parse_allow_disallow(pref, cap, list, allowing);
1301         *formats = ast_format_cap_to_old_bitfield(cap);
1302         cap = ast_format_cap_destroy(cap);
1303         return res;
1304
1305 }
1306
1307 static int update_common_options(struct ast_variable *v, struct call_options *options)
1308 {
1309         int tmp = 0;
1310         char *val, *opt;
1311
1312         if (!strcasecmp(v->name, "allow")) {
1313                 h323_parse_allow_disallow(&options->prefs, &options->capability, v->value, 1);
1314         } else if (!strcasecmp(v->name, "autoframing")) {
1315                 options->autoframing = ast_true(v->value);
1316         } else if (!strcasecmp(v->name, "disallow")) {
1317                 h323_parse_allow_disallow(&options->prefs, &options->capability, v->value, 0);
1318         } else if (!strcasecmp(v->name, "dtmfmode")) {
1319                 val = ast_strdupa(v->value);
1320                 if ((opt = strchr(val, ':')) != (char *)NULL) {
1321                         *opt++ = '\0';
1322                         tmp = atoi(opt);
1323                 }
1324                 if (!strcasecmp(v->value, "inband")) {
1325                         options->dtmfmode |= H323_DTMF_INBAND;
1326                 } else if (!strcasecmp(val, "rfc2833")) {
1327                         options->dtmfmode |= H323_DTMF_RFC2833;
1328                         if (!opt) {
1329                                 options->dtmfcodec[0] = H323_DTMF_RFC2833_PT;
1330                         } else if ((tmp >= 96) && (tmp < 128)) {
1331                                 options->dtmfcodec[0] = tmp;
1332                         } else {
1333                                 options->dtmfcodec[0] = H323_DTMF_RFC2833_PT;
1334                                 ast_log(LOG_WARNING, "Unknown rfc2833 payload %s specified at line %d, using default %d\n", opt, v->lineno, options->dtmfcodec[0]);
1335                         }
1336                 } else if (!strcasecmp(val, "cisco")) {
1337                         options->dtmfmode |= H323_DTMF_CISCO;
1338                         if (!opt) {
1339                                 options->dtmfcodec[1] = H323_DTMF_CISCO_PT;
1340                         } else if ((tmp >= 96) && (tmp < 128)) {
1341                                 options->dtmfcodec[1] = tmp;
1342                         } else {
1343                                 options->dtmfcodec[1] = H323_DTMF_CISCO_PT;
1344                                 ast_log(LOG_WARNING, "Unknown Cisco DTMF payload %s specified at line %d, using default %d\n", opt, v->lineno, options->dtmfcodec[1]);
1345                         }
1346                 } else if (!strcasecmp(v->value, "h245-signal")) {
1347                         options->dtmfmode |= H323_DTMF_SIGNAL;
1348                 } else {
1349                         ast_log(LOG_WARNING, "Unknown dtmf mode '%s' at line %d\n", v->value, v->lineno);
1350                 }
1351         } else if (!strcasecmp(v->name, "dtmfcodec")) {
1352                 ast_log(LOG_NOTICE, "Option %s at line %d is deprecated. Use dtmfmode=rfc2833[:<payload>] instead.\n", v->name, v->lineno);
1353                 tmp = atoi(v->value);
1354                 if (tmp < 96)
1355                         ast_log(LOG_WARNING, "Invalid %s value %s at line %d\n", v->name, v->value, v->lineno);
1356                 else
1357                         options->dtmfcodec[0] = tmp;
1358         } else if (!strcasecmp(v->name, "bridge")) {
1359                 options->bridge = ast_true(v->value);
1360         } else if (!strcasecmp(v->name, "nat")) {
1361                 options->nat = ast_true(v->value);
1362         } else if (!strcasecmp(v->name, "fastStart")) {
1363                 options->fastStart = ast_true(v->value);
1364         } else if (!strcasecmp(v->name, "h245Tunneling")) {
1365                 options->h245Tunneling = ast_true(v->value);
1366         } else if (!strcasecmp(v->name, "silenceSuppression")) {
1367                 options->silenceSuppression = ast_true(v->value);
1368         } else if (!strcasecmp(v->name, "progress_setup")) {
1369                 tmp = atoi(v->value);
1370                 if ((tmp != 0) && (tmp != 1) && (tmp != 3) && (tmp != 8)) {
1371                         ast_log(LOG_WARNING, "Invalid value %s for %s at line %d, assuming 0\n", v->value, v->name, v->lineno);
1372                         tmp = 0;
1373                 }
1374                 options->progress_setup = tmp;
1375         } else if (!strcasecmp(v->name, "progress_alert")) {
1376                 tmp = atoi(v->value);
1377                 if ((tmp != 0) && (tmp != 1) && (tmp != 8)) {
1378                         ast_log(LOG_WARNING, "Invalid value %s for %s at line %d, assuming 0\n", v->value, v->name, v->lineno);
1379                         tmp = 0;
1380                 }
1381                 options->progress_alert = tmp;
1382         } else if (!strcasecmp(v->name, "progress_audio")) {
1383                 options->progress_audio = ast_true(v->value);
1384         } else if (!strcasecmp(v->name, "callerid")) {
1385                 ast_callerid_split(v->value, options->cid_name, sizeof(options->cid_name), options->cid_num, sizeof(options->cid_num));
1386         } else if (!strcasecmp(v->name, "fullname")) {
1387                 ast_copy_string(options->cid_name, v->value, sizeof(options->cid_name));
1388         } else if (!strcasecmp(v->name, "cid_number")) {
1389                 ast_copy_string(options->cid_num, v->value, sizeof(options->cid_num));
1390         } else if (!strcasecmp(v->name, "tunneling")) {
1391                 if (!strcasecmp(v->value, "none"))
1392                         options->tunnelOptions = 0;
1393                 else if (!strcasecmp(v->value, "cisco"))
1394                         options->tunnelOptions |= H323_TUNNEL_CISCO;
1395                 else if (!strcasecmp(v->value, "qsig"))
1396                         options->tunnelOptions |= H323_TUNNEL_QSIG;
1397                 else
1398                         ast_log(LOG_WARNING, "Invalid value %s for %s at line %d\n", v->value, v->name, v->lineno);
1399         } else if (!strcasecmp(v->name, "hold")) {
1400                 if (!strcasecmp(v->value, "none"))
1401                         options->holdHandling = ~0;
1402                 else if (!strcasecmp(v->value, "notify"))
1403                         options->holdHandling |= H323_HOLD_NOTIFY;
1404                 else if (!strcasecmp(v->value, "q931only"))
1405                         options->holdHandling |= H323_HOLD_NOTIFY | H323_HOLD_Q931ONLY;
1406                 else if (!strcasecmp(v->value, "h450"))
1407                         options->holdHandling |= H323_HOLD_H450;
1408                 else
1409                         ast_log(LOG_WARNING, "Invalid value %s for %s at line %d\n", v->value, v->name, v->lineno);
1410         } else
1411                 return 1;
1412
1413         return 0;
1414 }
1415
1416 static struct oh323_user *build_user(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
1417 {
1418         struct oh323_user *user;
1419         struct ast_ha *oldha;
1420         int found = 0;
1421         int format;
1422
1423         user = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&userl, name, name, 0, 0, strcmp);
1424
1425         if (user)
1426                 found++;
1427         else {
1428                 if (!(user = ast_calloc(1, sizeof(*user))))
1429                         return NULL;
1430                 ASTOBJ_INIT(user);
1431         }
1432         oldha = user->ha;
1433         user->ha = (struct ast_ha *)NULL;
1434         memcpy(&user->options, &global_options, sizeof(user->options));
1435         user->options.dtmfmode = 0;
1436         user->options.holdHandling = 0;
1437         /* Set default context */
1438         ast_copy_string(user->context, default_context, sizeof(user->context));
1439         if (user && !found)
1440                 ast_copy_string(user->name, name, sizeof(user->name));
1441
1442 #if 0 /* XXX Port channel variables functionality from chan_sip XXX */
1443         if (user->chanvars) {
1444                 ast_variables_destroy(user->chanvars);
1445                 user->chanvars = NULL;
1446         }
1447 #endif
1448
1449         for (; v || ((v = alt) && !(alt = NULL)); v = v->next) {
1450                 if (!update_common_options(v, &user->options))
1451                         continue;
1452                 if (!strcasecmp(v->name, "context")) {
1453                         ast_copy_string(user->context, v->value, sizeof(user->context));
1454                 } else if (!strcasecmp(v->name, "secret")) {
1455                         ast_copy_string(user->secret, v->value, sizeof(user->secret));
1456                 } else if (!strcasecmp(v->name, "accountcode")) {
1457                         ast_copy_string(user->accountcode, v->value, sizeof(user->accountcode));
1458                 } else if (!strcasecmp(v->name, "host")) {
1459                         if (!strcasecmp(v->value, "dynamic")) {
1460                                 ast_log(LOG_ERROR, "A dynamic host on a type=user does not make any sense\n");
1461                                 ASTOBJ_UNREF(user, oh323_destroy_user);
1462                                 return NULL;
1463                         } else {
1464                                 struct ast_sockaddr tmp;
1465
1466                                 if (ast_get_ip(&tmp, v->value)) {
1467                                         ASTOBJ_UNREF(user, oh323_destroy_user);
1468                                         return NULL;
1469                                 }
1470                                 ast_sockaddr_to_sin(&tmp, &user->addr);
1471                         }
1472                         /* Let us know we need to use ip authentication */
1473                         user->host = 1;
1474                 } else if (!strcasecmp(v->name, "amaflags")) {
1475                         format = ast_cdr_amaflags2int(v->value);
1476                         if (format < 0) {
1477                                 ast_log(LOG_WARNING, "Invalid AMA Flags: %s at line %d\n", v->value, v->lineno);
1478                         } else {
1479                                 user->amaflags = format;
1480                         }
1481                 } else if (!strcasecmp(v->name, "permit") ||
1482                                         !strcasecmp(v->name, "deny")) {
1483                         int ha_error = 0;
1484
1485                         user->ha = ast_append_ha(v->name, v->value, user->ha, &ha_error);
1486                         if (ha_error)
1487                                 ast_log(LOG_ERROR, "Bad ACL entry in configuration line %d : %s\n", v->lineno, v->value);
1488                 }
1489         }
1490         if (!user->options.dtmfmode)
1491                 user->options.dtmfmode = global_options.dtmfmode;
1492         if (user->options.holdHandling == ~0)
1493                 user->options.holdHandling = 0;
1494         else if (!user->options.holdHandling)
1495                 user->options.holdHandling = global_options.holdHandling;
1496         ASTOBJ_UNMARK(user);
1497         ast_free_ha(oldha);
1498         return user;
1499 }
1500
1501 static struct oh323_user *realtime_user(const call_details_t *cd)
1502 {
1503         struct ast_variable *var, *tmp;
1504         struct oh323_user *user;
1505         const char *username;
1506
1507         if (userbyalias)
1508                 var = ast_load_realtime("h323", "name", username = cd->call_source_aliases, SENTINEL);
1509         else {
1510                 username = (char *)NULL;
1511                 var = ast_load_realtime("h323", "host", cd->sourceIp, SENTINEL);
1512         }
1513
1514         if (!var)
1515                 return NULL;
1516
1517         for (tmp = var; tmp; tmp = tmp->next) {
1518                 if (!strcasecmp(tmp->name, "type") &&
1519                 !(!strcasecmp(tmp->value, "user") || !strcasecmp(tmp->value, "friend"))) {
1520                         ast_variables_destroy(var);
1521                         return NULL;
1522                 } else if (!username && !strcasecmp(tmp->name, "name"))
1523                         username = tmp->value;
1524         }
1525
1526         if (!username) {
1527                 ast_log(LOG_WARNING, "Cannot determine user name for IP address %s\n", cd->sourceIp);
1528                 ast_variables_destroy(var);
1529                 return NULL;
1530         }
1531
1532         user = build_user(username, var, NULL, 1);
1533
1534         ast_variables_destroy(var);
1535
1536         return user;
1537 }
1538
1539 static struct oh323_peer *build_peer(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
1540 {
1541         struct oh323_peer *peer;
1542         struct ast_ha *oldha;
1543         int found = 0;
1544
1545         peer = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&peerl, name, name, 0, 0, strcmp);
1546
1547         if (peer)
1548                 found++;
1549         else {
1550                 if (!(peer = ast_calloc(1, sizeof(*peer))))
1551                         return NULL;
1552                 ASTOBJ_INIT(peer);
1553         }
1554         oldha = peer->ha;
1555         peer->ha = NULL;
1556         memcpy(&peer->options, &global_options, sizeof(peer->options));
1557         peer->options.dtmfmode = 0;
1558         peer->options.holdHandling = 0;
1559         peer->addr.sin_port = htons(h323_signalling_port);
1560         peer->addr.sin_family = AF_INET;
1561         if (!found && name)
1562                 ast_copy_string(peer->name, name, sizeof(peer->name));
1563
1564 #if 0 /* XXX Port channel variables functionality from chan_sip XXX */
1565         if (peer->chanvars) {
1566                 ast_variables_destroy(peer->chanvars);
1567                 peer->chanvars = NULL;
1568         }
1569 #endif
1570         /* Default settings for mailbox */
1571         peer->mailbox[0] = '\0';
1572
1573         for (; v || ((v = alt) && !(alt = NULL)); v = v->next) {
1574                 if (!update_common_options(v, &peer->options))
1575                         continue;
1576                 if (!strcasecmp(v->name, "host")) {
1577                         if (!strcasecmp(v->value, "dynamic")) {
1578                                 ast_log(LOG_ERROR, "Dynamic host configuration not implemented.\n");
1579                                 ASTOBJ_UNREF(peer, oh323_destroy_peer);
1580                                 return NULL;
1581                         }
1582                         {
1583                                 struct ast_sockaddr tmp;
1584
1585                                 if (ast_get_ip(&tmp, v->value)) {
1586                                         ast_log(LOG_ERROR, "Could not determine IP for %s\n", v->value);
1587                                         ASTOBJ_UNREF(peer, oh323_destroy_peer);
1588                                         return NULL;
1589                                 }
1590                                 ast_sockaddr_to_sin(&tmp, &peer->addr);
1591                         }
1592                 } else if (!strcasecmp(v->name, "port")) {
1593                         peer->addr.sin_port = htons(atoi(v->value));
1594                 } else if (!strcasecmp(v->name, "permit") ||
1595                                         !strcasecmp(v->name, "deny")) {
1596                         int ha_error = 0;
1597
1598                         peer->ha = ast_append_ha(v->name, v->value, peer->ha, &ha_error);
1599                         if (ha_error)
1600                                 ast_log(LOG_ERROR, "Bad ACL entry in configuration line %d : %s\n", v->lineno, v->value);
1601                 } else if (!strcasecmp(v->name, "mailbox")) {
1602                         ast_copy_string(peer->mailbox, v->value, sizeof(peer->mailbox));
1603                 } else if (!strcasecmp(v->name, "hasvoicemail")) {
1604                         if (ast_true(v->value) && ast_strlen_zero(peer->mailbox)) {
1605                                 ast_copy_string(peer->mailbox, name, sizeof(peer->mailbox));
1606                         }
1607                 }
1608         }
1609         if (!peer->options.dtmfmode)
1610                 peer->options.dtmfmode = global_options.dtmfmode;
1611         if (peer->options.holdHandling == ~0)
1612                 peer->options.holdHandling = 0;
1613         else if (!peer->options.holdHandling)
1614                 peer->options.holdHandling = global_options.holdHandling;
1615         ASTOBJ_UNMARK(peer);
1616         ast_free_ha(oldha);
1617         return peer;
1618 }
1619
1620 static struct oh323_peer *realtime_peer(const char *peername, struct sockaddr_in *sin)
1621 {
1622         struct oh323_peer *peer;
1623         struct ast_variable *var;
1624         struct ast_variable *tmp;
1625         const char *addr = NULL;
1626
1627         /* First check on peer name */
1628         if (peername)
1629                 var = ast_load_realtime("h323", "name", peername, SENTINEL);
1630         else if (sin) /* Then check on IP address for dynamic peers */
1631                 var = ast_load_realtime("h323", "host", addr = ast_inet_ntoa(sin->sin_addr), SENTINEL);
1632         else
1633                 return NULL;
1634
1635         if (!var)
1636                 return NULL;
1637
1638         for (tmp = var; tmp; tmp = tmp->next) {
1639                 /* If this is type=user, then skip this object. */
1640                 if (!strcasecmp(tmp->name, "type") &&
1641                                 !(!strcasecmp(tmp->value, "peer") || !strcasecmp(tmp->value, "friend"))) {
1642                         ast_variables_destroy(var);
1643                         return NULL;
1644                 } else if (!peername && !strcasecmp(tmp->name, "name")) {
1645                         peername = tmp->value;
1646                 }
1647         }
1648
1649         if (!peername) {        /* Did not find peer in realtime */
1650                 ast_log(LOG_WARNING, "Cannot determine peer name for IP address %s\n", addr);
1651                 ast_variables_destroy(var);
1652                 return NULL;
1653         }
1654
1655         /* Peer found in realtime, now build it in memory */
1656         peer = build_peer(peername, var, NULL, 1);
1657
1658         ast_variables_destroy(var);
1659
1660         return peer;
1661 }
1662
1663 static int oh323_addrcmp_str(struct in_addr inaddr, char *addr)
1664 {
1665         return strcmp(ast_inet_ntoa(inaddr), addr);
1666 }
1667
1668 static struct oh323_user *find_user(const call_details_t *cd, int realtime)
1669 {
1670         struct oh323_user *u;
1671
1672         if (userbyalias)
1673                 u = ASTOBJ_CONTAINER_FIND(&userl, cd->call_source_aliases);
1674         else
1675                 u = ASTOBJ_CONTAINER_FIND_FULL(&userl, cd->sourceIp, addr.sin_addr, 0, 0, oh323_addrcmp_str);
1676
1677         if (!u && realtime)
1678                 u = realtime_user(cd);
1679
1680         if (!u && h323debug)
1681                 ast_debug(1, "Could not find user by name %s or address %s\n", cd->call_source_aliases, cd->sourceIp);
1682
1683         return u;
1684 }
1685
1686 static int oh323_addrcmp(struct sockaddr_in addr, struct sockaddr_in *sin)
1687 {
1688         int res;
1689
1690         if (!sin)
1691                 res = -1;
1692         else
1693                 res = inaddrcmp(&addr , sin);
1694
1695         return res;
1696 }
1697
1698 static struct oh323_peer *find_peer(const char *peer, struct sockaddr_in *sin, int realtime)
1699 {
1700         struct oh323_peer *p;
1701
1702         if (peer)
1703                 p = ASTOBJ_CONTAINER_FIND(&peerl, peer);
1704         else
1705                 p = ASTOBJ_CONTAINER_FIND_FULL(&peerl, sin, addr, 0, 0, oh323_addrcmp);
1706
1707         if (!p && realtime)
1708                 p = realtime_peer(peer, sin);
1709
1710         if (!p && h323debug)
1711                 ast_debug(1, "Could not find peer by name %s or address %s\n", (peer ? peer : "<NONE>"), (sin ? ast_inet_ntoa(sin->sin_addr) : "<NONE>"));
1712
1713         return p;
1714 }
1715
1716 static int create_addr(struct oh323_pvt *pvt, char *opeer)
1717 {
1718         struct hostent *hp;
1719         struct ast_hostent ahp;
1720         struct oh323_peer *p;
1721         int portno;
1722         int found = 0;
1723         char *port;
1724         char *hostn;
1725         char peer[256] = "";
1726
1727         ast_copy_string(peer, opeer, sizeof(peer));
1728         port = strchr(peer, ':');
1729         if (port) {
1730                 *port = '\0';
1731                 port++;
1732         }
1733         pvt->sa.sin_family = AF_INET;
1734         p = find_peer(peer, NULL, 1);
1735         if (p) {
1736                 found++;
1737                 memcpy(&pvt->options, &p->options, sizeof(pvt->options));
1738                 pvt->jointcapability = pvt->options.capability;
1739                 if (pvt->options.dtmfmode) {
1740                         if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
1741                                 pvt->nonCodecCapability |= AST_RTP_DTMF;
1742                         } else {
1743                                 pvt->nonCodecCapability &= ~AST_RTP_DTMF;
1744                         }
1745                 }
1746                 if (p->addr.sin_addr.s_addr) {
1747                         pvt->sa.sin_addr = p->addr.sin_addr;
1748                         pvt->sa.sin_port = p->addr.sin_port;
1749                 }
1750                 ASTOBJ_UNREF(p, oh323_destroy_peer);
1751         }
1752         if (!p && !found) {
1753                 hostn = peer;
1754                 if (port) {
1755                         portno = atoi(port);
1756                 } else {
1757                         portno = h323_signalling_port;
1758                 }
1759                 hp = ast_gethostbyname(hostn, &ahp);
1760                 if (hp) {
1761                         memcpy(&pvt->sa.sin_addr, hp->h_addr, sizeof(pvt->sa.sin_addr));
1762                         pvt->sa.sin_port = htons(portno);
1763                         /* Look peer by address */
1764                         p = find_peer(NULL, &pvt->sa, 1);
1765                         memcpy(&pvt->options, (p ? &p->options : &global_options), sizeof(pvt->options));
1766                         pvt->jointcapability = pvt->options.capability;
1767                         if (p) {
1768                                 ASTOBJ_UNREF(p, oh323_destroy_peer);
1769                         }
1770                         if (pvt->options.dtmfmode) {
1771                                 if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
1772                                         pvt->nonCodecCapability |= AST_RTP_DTMF;
1773                                 } else {
1774                                         pvt->nonCodecCapability &= ~AST_RTP_DTMF;
1775                                 }
1776                         }
1777                         return 0;
1778                 } else {
1779                         ast_log(LOG_WARNING, "No such host: %s\n", peer);
1780                         return -1;
1781                 }
1782         } else if (!found) {
1783                 return -1;
1784         } else {
1785                 return 0;
1786         }
1787 }
1788 static struct ast_channel *oh323_request(const char *type, struct ast_format_cap *cap, const struct ast_channel *requestor, void *data, int *cause)
1789 {
1790         struct oh323_pvt *pvt;
1791         struct ast_channel *tmpc = NULL;
1792         char *dest = (char *)data;
1793         char *ext, *host;
1794         char *h323id = NULL;
1795         char tmp[256], tmp1[256];
1796
1797         if (h323debug)
1798                 ast_debug(1, "type=%s, format=%s, data=%s.\n", type, ast_getformatname_multiple(tmp, sizeof(tmp), cap), (char *)data);
1799
1800         pvt = oh323_alloc(0);
1801         if (!pvt) {
1802                 ast_log(LOG_WARNING, "Unable to build pvt data for '%s'\n", (char *)data);
1803                 return NULL;
1804         }
1805         if (!(ast_format_cap_has_type(cap, AST_FORMAT_TYPE_AUDIO))) {
1806                 ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%s'\n", ast_getformatname_multiple(tmp, sizeof(tmp), cap));
1807                 oh323_destroy(pvt);
1808                 if (cause)
1809                         *cause = AST_CAUSE_INCOMPATIBLE_DESTINATION;
1810                 return NULL;
1811         }
1812         ast_copy_string(tmp, dest, sizeof(tmp));
1813         host = strchr(tmp, '@');
1814         if (host) {
1815                 *host = '\0';
1816                 host++;
1817                 ext = tmp;
1818         } else {
1819                 ext = strrchr(tmp, '/');
1820                 if (ext)
1821                         *ext++ = '\0';
1822                 host = tmp;
1823         }
1824         strtok_r(host, "/", &(h323id));
1825         if (!ast_strlen_zero(h323id)) {
1826                 h323_set_id(h323id);
1827         }
1828         if (ext) {
1829                 ast_copy_string(pvt->exten, ext, sizeof(pvt->exten));
1830         }
1831         if (h323debug)
1832                 ast_debug(1, "Extension: %s Host: %s\n", pvt->exten, host);
1833
1834         if (gatekeeper_disable) {
1835                 if (create_addr(pvt, host)) {
1836                         oh323_destroy(pvt);
1837                         if (cause)
1838                                 *cause = AST_CAUSE_DESTINATION_OUT_OF_ORDER;
1839                         return NULL;
1840                 }
1841         }
1842         else {
1843                 memcpy(&pvt->options, &global_options, sizeof(pvt->options));
1844                 pvt->jointcapability = pvt->options.capability;
1845                 if (pvt->options.dtmfmode) {
1846                         if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
1847                                 pvt->nonCodecCapability |= AST_RTP_DTMF;
1848                         } else {
1849                                 pvt->nonCodecCapability &= ~AST_RTP_DTMF;
1850                         }
1851                 }
1852         }
1853
1854         ast_mutex_lock(&caplock);
1855         /* Generate unique channel identifier */
1856         snprintf(tmp1, sizeof(tmp1)-1, "%s-%u", host, ++unique);
1857         tmp1[sizeof(tmp1)-1] = '\0';
1858         ast_mutex_unlock(&caplock);
1859
1860         ast_mutex_lock(&pvt->lock);
1861         tmpc = __oh323_new(pvt, AST_STATE_DOWN, tmp1, requestor ? requestor->linkedid : NULL);
1862         ast_mutex_unlock(&pvt->lock);
1863         if (!tmpc) {
1864                 oh323_destroy(pvt);
1865                 if (cause)
1866                         *cause = AST_CAUSE_NORMAL_TEMPORARY_FAILURE;
1867         }
1868         ast_update_use_count();
1869         restart_monitor();
1870         return tmpc;
1871 }
1872
1873 /*! \brief Find a call by alias */
1874 static struct oh323_alias *find_alias(const char *source_aliases, int realtime)
1875 {
1876         struct oh323_alias *a;
1877
1878         a = ASTOBJ_CONTAINER_FIND(&aliasl, source_aliases);
1879
1880         if (!a && realtime)
1881                 a = realtime_alias(source_aliases);
1882
1883         return a;
1884 }
1885
1886 /*! \brief
1887   * Callback for sending digits from H.323 up to asterisk
1888   *
1889   */
1890 static int receive_digit(unsigned call_reference, char digit, const char *token, int duration)
1891 {
1892         struct oh323_pvt *pvt;
1893         int res;
1894
1895         pvt = find_call_locked(call_reference, token);
1896         if (!pvt) {
1897                 ast_log(LOG_ERROR, "Received digit '%c' (%u ms) for call %s without private structure\n", digit, duration, token);
1898                 return -1;
1899         }
1900         if (h323debug)
1901                 ast_log(LOG_DTMF, "Received %s digit '%c' (%u ms) for call %s\n", (digit == ' ' ? "update for" : "new"), (digit == ' ' ? pvt->curDTMF : digit), duration, token);
1902
1903         if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
1904                 if (digit == '!')
1905                         res = ast_queue_control(pvt->owner, AST_CONTROL_FLASH);
1906                 else {
1907                         struct ast_frame f = {
1908                                 .frametype = AST_FRAME_DTMF_END,
1909                                 .subclass.integer = digit,
1910                                 .samples = duration * 8,
1911                                 .len = duration,
1912                                 .src = "SEND_DIGIT",
1913                         };
1914                         if (digit == ' ') {             /* signalUpdate message */
1915                                 f.subclass.integer = pvt->curDTMF;
1916                                 AST_SCHED_DEL(sched, pvt->DTMFsched);
1917                         } else {                                /* Regular input or signal message */
1918                                 if (pvt->DTMFsched >= 0) {
1919                                         /* We still don't send DTMF END from previous event, send it now */
1920                                         AST_SCHED_DEL(sched, pvt->DTMFsched);
1921                                         f.subclass.integer = pvt->curDTMF;
1922                                         f.samples = f.len = 0;
1923                                         ast_queue_frame(pvt->owner, &f);
1924                                         /* Restore values */
1925                                         f.subclass.integer = digit;
1926                                         f.samples = duration * 8;
1927                                         f.len = duration;
1928                                 }
1929                                 if (duration) {         /* This is a signal, signalUpdate follows */
1930                                         f.frametype = AST_FRAME_DTMF_BEGIN;
1931                                         pvt->DTMFsched = ast_sched_add(sched, duration, oh323_simulate_dtmf_end, pvt);
1932                                         if (h323debug)
1933                                                 ast_log(LOG_DTMF, "Scheduled DTMF END simulation for %d ms, id=%d\n", duration, pvt->DTMFsched);
1934                                 }
1935                                 pvt->curDTMF = digit;
1936                         }
1937                         res = ast_queue_frame(pvt->owner, &f);
1938                 }
1939                 ast_channel_unlock(pvt->owner);
1940         } else {
1941                 if (digit == '!')
1942                         pvt->newcontrol = AST_CONTROL_FLASH;
1943                 else {
1944                         pvt->newduration = duration;
1945                         pvt->newdigit = digit;
1946                 }
1947                 res = 0;
1948         }
1949         ast_mutex_unlock(&pvt->lock);
1950         return res;
1951 }
1952
1953 /*! \brief
1954   * Callback function used to inform the H.323 stack of the local rtp ip/port details
1955   *
1956   * \return Returns the local RTP information
1957   */
1958 static struct rtp_info *external_rtp_create(unsigned call_reference, const char * token)
1959 {
1960         struct oh323_pvt *pvt;
1961         struct sockaddr_in us;
1962         struct rtp_info *info;
1963
1964         info = ast_calloc(1, sizeof(*info));
1965         if (!info) {
1966                 ast_log(LOG_ERROR, "Unable to allocated info structure, this is very bad\n");
1967                 return NULL;
1968         }
1969         pvt = find_call_locked(call_reference, token);
1970         if (!pvt) {
1971                 ast_free(info);
1972                 ast_log(LOG_ERROR, "Unable to find call %s(%d)\n", token, call_reference);
1973                 return NULL;
1974         }
1975         if (!pvt->rtp)
1976                 __oh323_rtp_create(pvt);
1977         if (!pvt->rtp) {
1978                 ast_mutex_unlock(&pvt->lock);
1979                 ast_free(info);
1980                 ast_log(LOG_ERROR, "No RTP stream is available for call %s (%d)", token, call_reference);
1981                 return NULL;
1982         }
1983         /* figure out our local RTP port and tell the H.323 stack about it */
1984         {
1985                 struct ast_sockaddr tmp;
1986
1987                 ast_rtp_instance_get_local_address(pvt->rtp, &tmp);
1988                 ast_sockaddr_to_sin(&tmp, &us);
1989         }
1990         ast_mutex_unlock(&pvt->lock);
1991
1992         ast_copy_string(info->addr, ast_inet_ntoa(us.sin_addr), sizeof(info->addr));
1993         info->port = ntohs(us.sin_port);
1994         if (h323debug)
1995                 ast_debug(1, "Sending RTP 'US' %s:%d\n", info->addr, info->port);
1996         return info;
1997 }
1998
1999 /*! \brief
2000   * Call-back function passing remote ip/port information from H.323 to asterisk
2001   *
2002   * Returns nothing
2003   */
2004 static void setup_rtp_connection(unsigned call_reference, const char *remoteIp, int remotePort, const char *token, int pt)
2005 {
2006         struct oh323_pvt *pvt;
2007         struct sockaddr_in them;
2008         int nativeformats_changed;
2009         enum { NEED_NONE, NEED_HOLD, NEED_UNHOLD } rtp_change = NEED_NONE;
2010
2011         if (h323debug)
2012                 ast_debug(1, "Setting up RTP connection for %s\n", token);
2013
2014         /* Find the call or allocate a private structure if call not found */
2015         pvt = find_call_locked(call_reference, token);
2016         if (!pvt) {
2017                 ast_log(LOG_ERROR, "Something is wrong: rtp\n");
2018                 return;
2019         }
2020         if (pvt->alreadygone) {
2021                 ast_mutex_unlock(&pvt->lock);
2022                 return;
2023         }
2024
2025         if (!pvt->rtp)
2026                 __oh323_rtp_create(pvt);
2027
2028         if ((pt == 2) && (pvt->jointcapability & AST_FORMAT_G726_AAL2)) {
2029                 ast_rtp_codecs_payloads_set_rtpmap_type(ast_rtp_instance_get_codecs(pvt->rtp), pvt->rtp, pt, "audio", "G726-32", AST_RTP_OPT_G726_NONSTANDARD);
2030         }
2031
2032         them.sin_family = AF_INET;
2033         /* only works for IPv4 */
2034         them.sin_addr.s_addr = inet_addr(remoteIp);
2035         them.sin_port = htons(remotePort);
2036
2037         if (them.sin_addr.s_addr) {
2038                 {
2039                         struct ast_sockaddr tmp;
2040
2041                         ast_sockaddr_from_sin(&tmp, &them);
2042                         ast_rtp_instance_set_remote_address(pvt->rtp, &tmp);
2043                 }
2044                 if (pvt->recvonly) {
2045                         pvt->recvonly = 0;
2046                         rtp_change = NEED_UNHOLD;
2047                 }
2048         } else {
2049                 ast_rtp_instance_stop(pvt->rtp);
2050                 if (!pvt->recvonly) {
2051                         pvt->recvonly = 1;
2052                         rtp_change = NEED_HOLD;
2053                 }
2054         }
2055
2056         /* Change native format to reflect information taken from OLC/OLCAck */
2057         nativeformats_changed = 0;
2058         if (pt != 128 && pvt->rtp) {    /* Payload type is invalid, so try to use previously decided */
2059                 struct ast_rtp_payload_type rtptype = ast_rtp_codecs_payload_lookup(ast_rtp_instance_get_codecs(pvt->rtp), pt);
2060                 if (rtptype.asterisk_format) {
2061                         if (pvt->nativeformats != ast_format_to_old_bitfield(&rtptype.format)) {
2062                                 pvt->nativeformats = ast_format_to_old_bitfield(&rtptype.format);
2063                                 nativeformats_changed = 1;
2064                         }
2065                 }
2066         } else if (h323debug)
2067                 ast_log(LOG_NOTICE, "Payload type is unknown, formats isn't changed\n");
2068
2069         /* Don't try to lock the channel if nothing changed */
2070         if (nativeformats_changed || pvt->options.progress_audio || (rtp_change != NEED_NONE)) {
2071                 if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
2072                         struct ast_format_cap *pvt_native = ast_format_cap_alloc_nolock();
2073                         ast_format_cap_from_old_bitfield(pvt_native, pvt->nativeformats);
2074
2075                         /* Re-build translation path only if native format(s) has been changed */
2076                         if (!(ast_format_cap_identical(pvt->owner->nativeformats, pvt_native))) {
2077                                 if (h323debug) {
2078                                         char tmp[256], tmp2[256];
2079                                         ast_debug(1, "Native format changed to '%s' from '%s', read format is %s, write format is %s\n", ast_getformatname_multiple(tmp, sizeof(tmp), pvt_native), ast_getformatname_multiple(tmp2, sizeof(tmp2), pvt->owner->nativeformats), ast_getformatname(&pvt->owner->readformat), ast_getformatname(&pvt->owner->writeformat));
2080                                 }
2081                                 ast_format_cap_copy(pvt->owner->nativeformats, pvt_native);
2082                                 ast_set_read_format(pvt->owner, &pvt->owner->readformat);
2083                                 ast_set_write_format(pvt->owner, &pvt->owner->writeformat);
2084                         }
2085                         if (pvt->options.progress_audio)
2086                                 ast_queue_control(pvt->owner, AST_CONTROL_PROGRESS);
2087                         switch (rtp_change) {
2088                         case NEED_HOLD:
2089                                 ast_queue_control(pvt->owner, AST_CONTROL_HOLD);
2090                                 break;
2091                         case NEED_UNHOLD:
2092                                 ast_queue_control(pvt->owner, AST_CONTROL_UNHOLD);
2093                                 break;
2094                         default:
2095                                 break;
2096                         }
2097                         ast_channel_unlock(pvt->owner);
2098                         pvt_native = ast_format_cap_destroy(pvt_native);
2099                 }
2100                 else {
2101                         if (pvt->options.progress_audio)
2102                                 pvt->newcontrol = AST_CONTROL_PROGRESS;
2103                         else if (rtp_change == NEED_HOLD)
2104                                 pvt->newcontrol = AST_CONTROL_HOLD;
2105                         else if (rtp_change == NEED_UNHOLD)
2106                                 pvt->newcontrol = AST_CONTROL_UNHOLD;
2107                         if (h323debug)
2108                                 ast_debug(1, "RTP connection preparation for %s is pending...\n", token);
2109                 }
2110         }
2111         ast_mutex_unlock(&pvt->lock);
2112
2113         if (h323debug)
2114                 ast_debug(1, "RTP connection prepared for %s\n", token);
2115
2116         return;
2117 }
2118
2119 /*! \brief
2120   *     Call-back function to signal asterisk that the channel has been answered
2121   * Returns nothing
2122   */
2123 static void connection_made(unsigned call_reference, const char *token)
2124 {
2125         struct oh323_pvt *pvt;
2126
2127         if (h323debug)
2128                 ast_debug(1, "Call %s answered\n", token);
2129
2130         pvt = find_call_locked(call_reference, token);
2131         if (!pvt) {
2132                 ast_log(LOG_ERROR, "Something is wrong: connection\n");
2133                 return;
2134         }
2135
2136         /* Inform asterisk about remote party connected only on outgoing calls */
2137         if (!pvt->outgoing) {
2138                 ast_mutex_unlock(&pvt->lock);
2139                 return;
2140         }
2141         /* Do not send ANSWER message more than once */
2142         if (!pvt->connection_established) {
2143                 pvt->connection_established = 1;
2144                 update_state(pvt, -1, AST_CONTROL_ANSWER);
2145         }
2146         ast_mutex_unlock(&pvt->lock);
2147         return;
2148 }
2149
2150 static int progress(unsigned call_reference, const char *token, int inband)
2151 {
2152         struct oh323_pvt *pvt;
2153
2154         if (h323debug)
2155                 ast_debug(1, "Received ALERT/PROGRESS message for %s tones\n", (inband ? "inband" : "self-generated"));
2156
2157         pvt = find_call_locked(call_reference, token);
2158         if (!pvt) {
2159                 ast_log(LOG_ERROR, "Private structure not found in progress.\n");
2160                 return -1;
2161         }
2162         if (!pvt->owner) {
2163                 ast_mutex_unlock(&pvt->lock);
2164                 ast_log(LOG_ERROR, "No Asterisk channel associated with private structure.\n");
2165                 return -1;
2166         }
2167         update_state(pvt, -1, (inband ? AST_CONTROL_PROGRESS : AST_CONTROL_RINGING));
2168         ast_mutex_unlock(&pvt->lock);
2169
2170         return 0;
2171 }
2172
2173 /*! \brief
2174  *  Call-back function for incoming calls
2175  *
2176  *  Returns 1 on success
2177  */
2178 static call_options_t *setup_incoming_call(call_details_t *cd)
2179 {
2180         struct oh323_pvt *pvt;
2181         struct oh323_user *user = NULL;
2182         struct oh323_alias *alias = NULL;
2183
2184         if (h323debug)
2185                 ast_debug(1, "Setting up incoming call for %s\n", cd->call_token);
2186
2187         /* allocate the call*/
2188         pvt = oh323_alloc(cd->call_reference);
2189
2190         if (!pvt) {
2191                 ast_log(LOG_ERROR, "Unable to allocate private structure, this is bad.\n");
2192                 cleanup_call_details(cd);
2193                 return NULL;
2194         }
2195
2196         /* Populate the call details in the private structure */
2197         memcpy(&pvt->cd, cd, sizeof(pvt->cd));
2198         memcpy(&pvt->options, &global_options, sizeof(pvt->options));
2199         pvt->jointcapability = pvt->options.capability;
2200
2201         if (h323debug) {
2202                 ast_verb(3, "Setting up Call\n");
2203                 ast_verb(3, " \tCall token:  [%s]\n", pvt->cd.call_token);
2204                 ast_verb(3, " \tCalling party name:  [%s]\n", pvt->cd.call_source_name);
2205                 ast_verb(3, " \tCalling party number:  [%s]\n", pvt->cd.call_source_e164);
2206                 ast_verb(3, " \tCalled party name:  [%s]\n", pvt->cd.call_dest_alias);
2207                 ast_verb(3, " \tCalled party number:  [%s]\n", pvt->cd.call_dest_e164);
2208                 if (pvt->cd.redirect_reason >= 0)
2209                         ast_verb(3, " \tRedirecting party number:  [%s] (reason %d)\n", pvt->cd.redirect_number, pvt->cd.redirect_reason);
2210                 ast_verb(3, " \tCalling party IP:  [%s]\n", pvt->cd.sourceIp);
2211         }
2212
2213         /* Decide if we are allowing Gatekeeper routed calls*/
2214         if ((!strcasecmp(cd->sourceIp, gatekeeper)) && (gkroute == -1) && !gatekeeper_disable) {
2215                 if (!ast_strlen_zero(cd->call_dest_e164)) {
2216                         ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
2217                         ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
2218                 } else {
2219                         alias = find_alias(cd->call_dest_alias, 1);
2220                         if (!alias) {
2221                                 ast_log(LOG_ERROR, "Call for %s rejected, alias not found\n", cd->call_dest_alias);
2222                                 oh323_destroy(pvt);
2223                                 return NULL;
2224                         }
2225                         ast_copy_string(pvt->exten, alias->name, sizeof(pvt->exten));
2226                         ast_copy_string(pvt->context, alias->context, sizeof(pvt->context));
2227                 }
2228         } else {
2229                 /* Either this call is not from the Gatekeeper
2230                    or we are not allowing gk routed calls */
2231                 user = find_user(cd, 1);
2232                 if (!user) {
2233                         if (!acceptAnonymous) {
2234                                 ast_log(LOG_NOTICE, "Anonymous call from '%s@%s' rejected\n", pvt->cd.call_source_aliases, pvt->cd.sourceIp);
2235                                 oh323_destroy(pvt);
2236                                 return NULL;
2237                         }
2238                         if (ast_strlen_zero(default_context)) {
2239                                 ast_log(LOG_ERROR, "Call from '%s@%s' rejected due to no default context\n", pvt->cd.call_source_aliases, pvt->cd.sourceIp);
2240                                 oh323_destroy(pvt);
2241                                 return NULL;
2242                         }
2243                         ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
2244                         if (!ast_strlen_zero(pvt->cd.call_dest_e164)) {
2245                                 ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
2246                         } else {
2247                                 ast_copy_string(pvt->exten, cd->call_dest_alias, sizeof(pvt->exten));
2248                         }
2249                         if (h323debug)
2250                                 ast_debug(1, "Sending %s@%s to context [%s] extension %s\n", cd->call_source_aliases, cd->sourceIp, pvt->context, pvt->exten);
2251                 } else {
2252                         if (user->host) {
2253                                 if (strcasecmp(cd->sourceIp, ast_inet_ntoa(user->addr.sin_addr))) {
2254                                         if (ast_strlen_zero(user->context)) {
2255                                                 if (ast_strlen_zero(default_context)) {
2256                                                         ast_log(LOG_ERROR, "Call from '%s' rejected due to non-matching IP address (%s) and no default context\n", user->name, cd->sourceIp);
2257                                                         oh323_destroy(pvt);
2258                                                         ASTOBJ_UNREF(user, oh323_destroy_user);
2259                                                         return NULL;
2260                                                 }
2261                                                 ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
2262                                         } else {
2263                                                 ast_copy_string(pvt->context, user->context, sizeof(pvt->context));
2264                                         }
2265                                         pvt->exten[0] = 'i';
2266                                         pvt->exten[1] = '\0';
2267                                         ast_log(LOG_ERROR, "Call from '%s' rejected due to non-matching IP address (%s)s\n", user->name, cd->sourceIp);
2268                                         oh323_destroy(pvt);
2269                                         ASTOBJ_UNREF(user, oh323_destroy_user);
2270                                         return NULL;    /* XXX: Hmmm... Why to setup context if we drop connection immediately??? */
2271                                 }
2272                         }
2273                         ast_copy_string(pvt->context, user->context, sizeof(pvt->context));
2274                         memcpy(&pvt->options, &user->options, sizeof(pvt->options));
2275                         pvt->jointcapability = pvt->options.capability;
2276                         if (!ast_strlen_zero(pvt->cd.call_dest_e164)) {
2277                                 ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
2278                         } else {
2279                                 ast_copy_string(pvt->exten, cd->call_dest_alias, sizeof(pvt->exten));
2280                         }
2281                         if (!ast_strlen_zero(user->accountcode)) {
2282                                 ast_copy_string(pvt->accountcode, user->accountcode, sizeof(pvt->accountcode));
2283                         }
2284                         if (user->amaflags) {
2285                                 pvt->amaflags = user->amaflags;
2286                         }
2287                         ASTOBJ_UNREF(user, oh323_destroy_user);
2288                 }
2289         }
2290         return &pvt->options;
2291 }
2292
2293 /*! \brief
2294  * Call-back function to start PBX when OpenH323 ready to serve incoming call
2295  *
2296  * Returns 1 on success
2297  */
2298 static int answer_call(unsigned call_reference, const char *token)
2299 {
2300         struct oh323_pvt *pvt;
2301         struct ast_channel *c = NULL;
2302         enum {ext_original, ext_s, ext_i, ext_notexists} try_exten;
2303         char tmp_exten[sizeof(pvt->exten)];
2304
2305         if (h323debug)
2306                 ast_debug(1, "Preparing Asterisk to answer for %s\n", token);
2307
2308         /* Find the call or allocate a private structure if call not found */
2309         pvt = find_call_locked(call_reference, token);
2310         if (!pvt) {
2311                 ast_log(LOG_ERROR, "Something is wrong: answer_call\n");
2312                 return 0;
2313         }
2314         /* Check if requested extension@context pair exists in the dialplan */
2315         ast_copy_string(tmp_exten, pvt->exten, sizeof(tmp_exten));
2316
2317         /* Try to find best extension in specified context */
2318         if ((tmp_exten[0] != '\0') && (tmp_exten[1] == '\0')) {
2319                 if (tmp_exten[0] == 's')
2320                         try_exten = ext_s;
2321                 else if (tmp_exten[0] == 'i')
2322                         try_exten = ext_i;
2323                 else
2324                         try_exten = ext_original;
2325         } else
2326                 try_exten = ext_original;
2327         do {
2328                 if (ast_exists_extension(NULL, pvt->context, tmp_exten, 1, NULL))
2329                         break;
2330                 switch (try_exten) {
2331                 case ext_original:
2332                         tmp_exten[0] = 's';
2333                         tmp_exten[1] = '\0';
2334                         try_exten = ext_s;
2335                         break;
2336                 case ext_s:
2337                         tmp_exten[0] = 'i';
2338                         try_exten = ext_i;
2339                         break;
2340                 case ext_i:
2341                         try_exten = ext_notexists;
2342                         break;
2343                 default:
2344                         break;
2345                 }
2346         } while (try_exten != ext_notexists);
2347
2348         /* Drop the call if we don't have <exten>, s and i extensions */
2349         if (try_exten == ext_notexists) {
2350                 ast_log(LOG_NOTICE, "Dropping call because extensions '%s', 's' and 'i' doesn't exists in context [%s]\n", pvt->exten, pvt->context);
2351                 ast_mutex_unlock(&pvt->lock);
2352                 h323_clear_call(token, AST_CAUSE_UNALLOCATED);
2353                 return 0;
2354         } else if ((try_exten != ext_original) && (strcmp(pvt->exten, tmp_exten) != 0)) {
2355                 if (h323debug)
2356                         ast_debug(1, "Going to extension %s@%s because %s@%s isn't exists\n", tmp_exten, pvt->context, pvt->exten, pvt->context);
2357                 ast_copy_string(pvt->exten, tmp_exten, sizeof(pvt->exten));
2358         }
2359
2360         /* allocate a channel and tell asterisk about it */
2361         c = __oh323_new(pvt, AST_STATE_RINGING, pvt->cd.call_token, NULL);
2362
2363         /* And release when done */
2364         ast_mutex_unlock(&pvt->lock);
2365         if (!c) {
2366                 ast_log(LOG_ERROR, "Couldn't create channel. This is bad\n");
2367                 return 0;
2368         }
2369         return 1;
2370 }
2371
2372 /*! \brief
2373  * Call-back function to establish an outgoing H.323 call
2374  *
2375  * Returns 1 on success
2376  */
2377 static int setup_outgoing_call(call_details_t *cd)
2378 {
2379         /* Use argument here or free it immediately */
2380         cleanup_call_details(cd);
2381
2382         return 1;
2383 }
2384
2385 /*! \brief
2386   *  Call-back function to signal asterisk that the channel is ringing
2387   *  Returns nothing
2388   */
2389 static void chan_ringing(unsigned call_reference, const char *token)
2390 {
2391         struct oh323_pvt *pvt;
2392
2393         if (h323debug)
2394                 ast_debug(1, "Ringing on %s\n", token);
2395
2396         pvt = find_call_locked(call_reference, token);
2397         if (!pvt) {
2398                 ast_log(LOG_ERROR, "Something is wrong: ringing\n");
2399                 return;
2400         }
2401         if (!pvt->owner) {
2402                 ast_mutex_unlock(&pvt->lock);
2403                 ast_log(LOG_ERROR, "Channel has no owner\n");
2404                 return;
2405         }
2406         update_state(pvt, AST_STATE_RINGING, AST_CONTROL_RINGING);
2407         ast_mutex_unlock(&pvt->lock);
2408         return;
2409 }
2410
2411 /*! \brief
2412   * Call-back function to cleanup communication
2413   * Returns nothing,
2414   */
2415 static void cleanup_connection(unsigned call_reference, const char *call_token)
2416 {
2417         struct oh323_pvt *pvt;
2418
2419         if (h323debug)
2420                 ast_debug(1, "Cleaning connection to %s\n", call_token);
2421
2422         while (1) {
2423                 pvt = find_call_locked(call_reference, call_token);
2424                 if (!pvt) {
2425                         if (h323debug)
2426                                 ast_debug(1, "No connection for %s\n", call_token);
2427                         return;
2428                 }
2429                 if (!pvt->owner || !ast_channel_trylock(pvt->owner))
2430                         break;
2431 #if 1
2432                 ast_log(LOG_NOTICE, "Avoiding H.323 destory deadlock on %s\n", call_token);
2433 #ifdef DEBUG_THREADS
2434                 /* XXX to be completed
2435                  * If we want to print more info on who is holding the lock,
2436                  * implement the relevant code in lock.h and use the routines
2437                  * supplied there.
2438                  */
2439 #endif
2440 #endif
2441                 ast_mutex_unlock(&pvt->lock);
2442                 usleep(1);
2443         }
2444         if (pvt->rtp) {
2445                 /* Immediately stop RTP */
2446                 ast_rtp_instance_destroy(pvt->rtp);
2447                 pvt->rtp = NULL;
2448         }
2449         /* Free dsp used for in-band DTMF detection */
2450         if (pvt->vad) {
2451                 ast_dsp_free(pvt->vad);
2452                 pvt->vad = NULL;
2453         }
2454         cleanup_call_details(&pvt->cd);
2455         pvt->alreadygone = 1;
2456         /* Send hangup */
2457         if (pvt->owner) {
2458                 pvt->owner->_softhangup |= AST_SOFTHANGUP_DEV;
2459                 ast_queue_hangup(pvt->owner);
2460                 ast_channel_unlock(pvt->owner);
2461         }
2462         ast_mutex_unlock(&pvt->lock);
2463         if (h323debug)
2464                 ast_debug(1, "Connection to %s cleaned\n", call_token);
2465         return;
2466 }
2467
2468 static void hangup_connection(unsigned int call_reference, const char *token, int cause)
2469 {
2470         struct oh323_pvt *pvt;
2471
2472         if (h323debug)
2473                 ast_debug(1, "Hanging up connection to %s with cause %d\n", token, cause);
2474
2475         pvt = find_call_locked(call_reference, token);
2476         if (!pvt) {
2477                 if (h323debug)
2478                         ast_debug(1, "Connection to %s already cleared\n", token);
2479                 return;
2480         }
2481         if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
2482                 pvt->owner->_softhangup |= AST_SOFTHANGUP_DEV;
2483                 pvt->owner->hangupcause = pvt->hangupcause = cause;
2484                 ast_queue_hangup_with_cause(pvt->owner, cause);
2485                 ast_channel_unlock(pvt->owner);
2486         }
2487         else {
2488                 pvt->needhangup = 1;
2489                 pvt->hangupcause = cause;
2490                 if (h323debug)
2491                         ast_debug(1, "Hangup for %s is pending\n", token);
2492         }
2493         ast_mutex_unlock(&pvt->lock);
2494 }
2495
2496 static void set_dtmf_payload(unsigned call_reference, const char *token, int payload, int is_cisco)
2497 {
2498         struct oh323_pvt *pvt;
2499
2500         if (h323debug)
2501                 ast_debug(1, "Setting %s DTMF payload to %d on %s\n", (is_cisco ? "Cisco" : "RFC2833"), payload, token);
2502
2503         pvt = find_call_locked(call_reference, token);
2504         if (!pvt) {
2505                 return;
2506         }
2507         if (pvt->rtp) {
2508                 ast_rtp_codecs_payloads_set_rtpmap_type(ast_rtp_instance_get_codecs(pvt->rtp), pvt->rtp, payload, "audio", (is_cisco ? "cisco-telephone-event" : "telephone-event"), 0);
2509         }
2510         pvt->dtmf_pt[is_cisco ? 1 : 0] = payload;
2511         ast_mutex_unlock(&pvt->lock);
2512         if (h323debug)
2513                 ast_debug(1, "DTMF payload on %s set to %d\n", token, payload);
2514 }
2515
2516 static void set_peer_capabilities(unsigned call_reference, const char *token, int capabilities, struct ast_codec_pref *prefs)
2517 {
2518         struct oh323_pvt *pvt;
2519
2520         if (h323debug)
2521                 ast_debug(1, "Got remote capabilities from connection %s\n", token);
2522
2523         pvt = find_call_locked(call_reference, token);
2524         if (!pvt)
2525                 return;
2526         pvt->peercapability = capabilities;
2527         pvt->jointcapability = pvt->options.capability & capabilities;
2528         if (prefs) {
2529                 memcpy(&pvt->peer_prefs, prefs, sizeof(pvt->peer_prefs));
2530                 if (h323debug) {
2531                         int i;
2532                         for (i = 0; i < 32; ++i) {
2533                                 if (!prefs->order[i])
2534                                         break;
2535                                 ast_debug(1, "prefs[%d]=%s:%d\n", i, (prefs->order[i] ? ast_getformatname(&prefs->formats[i]) : "<none>"), prefs->framing[i]);
2536                         }
2537                 }
2538                 if (pvt->rtp) {
2539                         if (pvt->options.autoframing) {
2540                                 ast_debug(2, "Autoframing option set, using peer's packetization settings\n");
2541                                 ast_rtp_codecs_packetization_set(ast_rtp_instance_get_codecs(pvt->rtp), pvt->rtp, &pvt->peer_prefs);
2542                         } else {
2543                                 ast_debug(2, "Autoframing option not set, ignoring peer's packetization settings\n");
2544                                 ast_rtp_codecs_packetization_set(ast_rtp_instance_get_codecs(pvt->rtp), pvt->rtp, &pvt->options.prefs);
2545                         }
2546                 }
2547         }
2548         ast_mutex_unlock(&pvt->lock);
2549 }
2550
2551 static void set_local_capabilities(unsigned call_reference, const char *token)
2552 {
2553         struct oh323_pvt *pvt;
2554         int capability, dtmfmode, pref_codec;
2555         struct ast_codec_pref prefs;
2556
2557         if (h323debug)
2558                 ast_debug(1, "Setting capabilities for connection %s\n", token);
2559
2560         pvt = find_call_locked(call_reference, token);
2561         if (!pvt)
2562                 return;
2563         capability = (pvt->jointcapability) ? pvt->jointcapability : pvt->options.capability;
2564         dtmfmode = pvt->options.dtmfmode;
2565         prefs = pvt->options.prefs;
2566         pref_codec = pvt->pref_codec;
2567         ast_mutex_unlock(&pvt->lock);
2568         h323_set_capabilities(token, capability, dtmfmode, &prefs, pref_codec);
2569
2570         if (h323debug) {
2571                 int i;
2572                 for (i = 0; i < 32; i++) {
2573                         if (!prefs.order[i])
2574                                 break;
2575                         ast_debug(1, "local prefs[%d]=%s:%d\n", i, (prefs.order[i] ? ast_getformatname(&prefs.formats[i]) : "<none>"), prefs.framing[i]);
2576                 }
2577                 ast_debug(1, "Capabilities for connection %s is set\n", token);
2578         }
2579 }
2580
2581 static void remote_hold(unsigned call_reference, const char *token, int is_hold)
2582 {
2583         struct oh323_pvt *pvt;
2584
2585         if (h323debug)
2586                 ast_debug(1, "Setting %shold status for connection %s\n", (is_hold ? "" : "un"), token);
2587
2588         pvt = find_call_locked(call_reference, token);
2589         if (!pvt)
2590                 return;
2591         if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
2592                 if (is_hold)
2593                         ast_queue_control(pvt->owner, AST_CONTROL_HOLD);
2594                 else
2595                         ast_queue_control(pvt->owner, AST_CONTROL_UNHOLD);
2596                 ast_channel_unlock(pvt->owner);
2597         }
2598         else {
2599                 if (is_hold)
2600                         pvt->newcontrol = AST_CONTROL_HOLD;
2601                 else
2602                         pvt->newcontrol = AST_CONTROL_UNHOLD;
2603         }
2604         ast_mutex_unlock(&pvt->lock);
2605 }
2606
2607 static void *do_monitor(void *data)
2608 {
2609         int res;
2610         int reloading;
2611         struct oh323_pvt *oh323 = NULL;
2612
2613         for(;;) {
2614                 /* Check for a reload request */
2615                 ast_mutex_lock(&h323_reload_lock);
2616                 reloading = h323_reloading;
2617                 h323_reloading = 0;
2618                 ast_mutex_unlock(&h323_reload_lock);
2619                 if (reloading) {
2620                         ast_verb(1, "Reloading H.323\n");
2621                         h323_do_reload();
2622                 }
2623                 /* Check for interfaces needing to be killed */
2624                 if (!ast_mutex_trylock(&iflock)) {
2625 #if 1
2626                         do {
2627                                 for (oh323 = iflist; oh323; oh323 = oh323->next) {
2628                                         if (!ast_mutex_trylock(&oh323->lock)) {
2629                                                 if (oh323->needdestroy) {
2630                                                         __oh323_destroy(oh323);
2631                                                         break;
2632                                                 }
2633                                                 ast_mutex_unlock(&oh323->lock);
2634                                         }
2635                                 }
2636                         } while (/*oh323*/ 0);
2637 #else
2638 restartsearch:
2639                         oh323 = iflist;
2640                         while(oh323) {
2641                                 if (!ast_mutex_trylock(&oh323->lock)) {
2642                                         if (oh323->needdestroy) {
2643                                                 __oh323_destroy(oh323);
2644                                                 goto restartsearch;
2645                                         }
2646                                         ast_mutex_unlock(&oh323->lock);
2647                                         oh323 = oh323->next;
2648                                 }
2649                         }
2650 #endif
2651                         ast_mutex_unlock(&iflock);
2652                 } else
2653                         oh323 = (struct oh323_pvt *)1;  /* Force fast loop */
2654                 pthread_testcancel();
2655                 /* Wait for sched or io */
2656                 res = ast_sched_wait(sched);
2657                 if ((res < 0) || (res > 1000)) {
2658                         res = 1000;
2659                 }
2660                 /* Do not wait if some channel(s) is destroyed, probably, more available too */
2661                 if (oh323)
2662                         res = 1;
2663                 res = ast_io_wait(io, res);
2664                 pthread_testcancel();
2665                 ast_mutex_lock(&monlock);
2666                 if (res >= 0) {
2667                         ast_sched_runq(sched);
2668                 }
2669                 ast_mutex_unlock(&monlock);
2670         }
2671         /* Never reached */
2672         return NULL;
2673 }
2674
2675 static int restart_monitor(void)
2676 {
2677         /* If we're supposed to be stopped -- stay stopped */
2678         if (ast_mutex_lock(&monlock)) {
2679                 ast_log(LOG_WARNING, "Unable to lock monitor\n");
2680                 return -1;
2681         }
2682         if (monitor_thread == AST_PTHREADT_STOP) {
2683                 ast_mutex_unlock(&monlock);
2684                 return 0;
2685         }
2686         if (monitor_thread == pthread_self()) {
2687                 ast_mutex_unlock(&monlock);
2688                 ast_log(LOG_WARNING, "Cannot kill myself\n");
2689                 return -1;
2690         }
2691         if (monitor_thread && (monitor_thread != AST_PTHREADT_NULL)) {
2692                 /* Wake up the thread */
2693                 pthread_kill(monitor_thread, SIGURG);
2694         } else {
2695                 /* Start a new monitor */
2696                 if (ast_pthread_create_background(&monitor_thread, NULL, do_monitor, NULL) < 0) {
2697                         monitor_thread = AST_PTHREADT_NULL;
2698                         ast_mutex_unlock(&monlock);
2699                         ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
2700                         return -1;
2701                 }
2702         }
2703         ast_mutex_unlock(&monlock);
2704         return 0;
2705 }
2706
2707 static char *handle_cli_h323_set_trace(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
2708 {
2709         switch (cmd) {
2710         case CLI_INIT:
2711                 e->command = "h323 set trace [on|off]";
2712                 e->usage =
2713                         "Usage: h323 set trace (on|off|<trace level>)\n"
2714                         "       Enable/Disable H.323 stack tracing for debugging purposes\n";
2715                 return NULL;
2716         case CLI_GENERATE:
2717                 return NULL;
2718         }
2719
2720         if (a->argc != e->args)
2721                 return CLI_SHOWUSAGE;
2722         if (!strcasecmp(a->argv[3], "off")) {
2723                 h323_debug(0, 0);
2724                 ast_cli(a->fd, "H.323 Trace Disabled\n");
2725         } else if (!strcasecmp(a->argv[3], "on")) {
2726                 h323_debug(1, 1);
2727                 ast_cli(a->fd, "H.323 Trace Enabled\n");
2728         } else {
2729                 int tracelevel = atoi(a->argv[3]);
2730                 h323_debug(1, tracelevel);
2731                 ast_cli(a->fd, "H.323 Trace Enabled (Trace Level: %d)\n", tracelevel);
2732         }
2733         return CLI_SUCCESS;
2734 }
2735
2736 static char *handle_cli_h323_set_debug(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
2737 {
2738         switch (cmd) {
2739         case CLI_INIT:
2740                 e->command = "h323 set debug [on|off]";
2741                 e->usage =
2742                         "Usage: h323 set debug [on|off]\n"
2743                         "       Enable/Disable H.323 debugging output\n";
2744                 return NULL;
2745         case CLI_GENERATE:
2746                 return NULL;
2747         }
2748
2749         if (a->argc != e->args)
2750                 return CLI_SHOWUSAGE;
2751         if (strcasecmp(a->argv[3], "on") && strcasecmp(a->argv[3], "off"))
2752                 return CLI_SHOWUSAGE;
2753
2754         h323debug = (strcasecmp(a->argv[3], "on")) ? 0 : 1;
2755         ast_cli(a->fd, "H.323 Debugging %s\n", h323debug ? "Enabled" : "Disabled");
2756         return CLI_SUCCESS;
2757 }
2758
2759 static char *handle_cli_h323_cycle_gk(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
2760 {
2761         switch (cmd) {
2762         case CLI_INIT:
2763                 e->command = "h323 cycle gk";
2764                 e->usage =
2765                         "Usage: h323 cycle gk\n"
2766                         "       Manually re-register with the Gatekeper (Currently Disabled)\n";
2767                 return NULL;
2768         case CLI_GENERATE:
2769                 return NULL;
2770         }
2771
2772         if (a->argc != 3)
2773                 return CLI_SHOWUSAGE;
2774
2775         h323_gk_urq();
2776
2777         /* Possibly register with a GK */
2778         if (!gatekeeper_disable) {
2779                 if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
2780                         ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
2781                 }
2782         }
2783         return CLI_SUCCESS;
2784 }
2785
2786 static char *handle_cli_h323_hangup(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
2787 {
2788         switch (cmd) {
2789         case CLI_INIT:
2790                 e->command = "h323 hangup";
2791                 e->usage =
2792                         "Usage: h323 hangup <token>\n"
2793                         "       Manually try to hang up the call identified by <token>\n";
2794                 return NULL;
2795         case CLI_GENERATE:
2796                 return NULL;
2797         }
2798
2799         if (a->argc != 3)
2800                 return CLI_SHOWUSAGE;
2801         if (h323_soft_hangup(a->argv[2])) {
2802                 ast_verb(3, "Hangup succeeded on %s\n", a->argv[2]);
2803         } else {
2804                 ast_verb(3, "Hangup failed for %s\n", a->argv[2]);
2805         }
2806         return CLI_SUCCESS;
2807 }
2808
2809 static char *handle_cli_h323_show_tokens(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
2810 {
2811         switch (cmd) {
2812         case CLI_INIT:
2813                 e->command = "h323 show tokens";
2814                 e->usage =
2815                         "Usage: h323 show tokens\n"
2816                         "       Print out all active call tokens\n";
2817                 return NULL;
2818         case CLI_GENERATE:
2819                 return NULL;
2820         }
2821
2822         if (a->argc != 3)
2823                 return CLI_SHOWUSAGE;
2824
2825         h323_show_tokens();
2826
2827         return CLI_SUCCESS;
2828 }
2829
2830 static char *handle_cli_h323_show_version(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
2831 {
2832         switch (cmd) {
2833         case CLI_INIT:
2834                 e->command = "h323 show version";
2835                 e->usage =
2836                         "Usage: h323 show version\n"
2837                         "               Show the version of the H.323 library in use\n";
2838                 return NULL;
2839         case CLI_GENERATE:
2840                 return NULL;
2841         }
2842
2843         if (a->argc != 3)
2844                 return CLI_SHOWUSAGE;
2845
2846         h323_show_version();
2847         
2848         return CLI_SUCCESS;
2849 }
2850
2851 static struct ast_cli_entry cli_h323[] = {
2852         AST_CLI_DEFINE(handle_cli_h323_set_trace,    "Enable/Disable H.323 Stack Tracing"),
2853         AST_CLI_DEFINE(handle_cli_h323_set_debug,    "Enable/Disable H.323 Debugging"),
2854         AST_CLI_DEFINE(handle_cli_h323_cycle_gk,     "Manually re-register with the Gatekeper"),
2855         AST_CLI_DEFINE(handle_cli_h323_hangup,       "Manually try to hang up a call"),
2856         AST_CLI_DEFINE(handle_cli_h323_show_tokens,  "Show all active call tokens"),
2857         AST_CLI_DEFINE(handle_cli_h323_show_version, "Show the version of the H.323 library in use"),
2858 };
2859
2860 static void delete_users(void)
2861 {
2862         int pruned = 0;
2863
2864         /* Delete all users */
2865         ASTOBJ_CONTAINER_WRLOCK(&userl);
2866         ASTOBJ_CONTAINER_TRAVERSE(&userl, 1, do {
2867                 ASTOBJ_RDLOCK(iterator);
2868                 ASTOBJ_MARK(iterator);
2869                 ++pruned;
2870                 ASTOBJ_UNLOCK(iterator);
2871         } while (0) );
2872         if (pruned) {
2873                 ASTOBJ_CONTAINER_PRUNE_MARKED(&userl, oh323_destroy_user);
2874         }
2875         ASTOBJ_CONTAINER_UNLOCK(&userl);
2876
2877         ASTOBJ_CONTAINER_WRLOCK(&peerl);
2878         ASTOBJ_CONTAINER_TRAVERSE(&peerl, 1, do {
2879                 ASTOBJ_RDLOCK(iterator);
2880                 ASTOBJ_MARK(iterator);
2881                 ASTOBJ_UNLOCK(iterator);
2882         } while (0) );
2883         ASTOBJ_CONTAINER_UNLOCK(&peerl);
2884 }
2885
2886 static void delete_aliases(void)
2887 {
2888         int pruned = 0;
2889
2890         /* Delete all aliases */
2891         ASTOBJ_CONTAINER_WRLOCK(&aliasl);
2892         ASTOBJ_CONTAINER_TRAVERSE(&aliasl, 1, do {
2893                 ASTOBJ_RDLOCK(iterator);
2894                 ASTOBJ_MARK(iterator);
2895                 ++pruned;
2896                 ASTOBJ_UNLOCK(iterator);
2897         } while (0) );
2898         if (pruned) {
2899                 ASTOBJ_CONTAINER_PRUNE_MARKED(&aliasl, oh323_destroy_alias);
2900         }
2901         ASTOBJ_CONTAINER_UNLOCK(&aliasl);
2902 }
2903
2904 static void prune_peers(void)
2905 {
2906         /* Prune peers who still are supposed to be deleted */
2907         ASTOBJ_CONTAINER_PRUNE_MARKED(&peerl, oh323_destroy_peer);
2908 }
2909
2910 static int reload_config(int is_reload)
2911 {
2912         struct ast_config *cfg, *ucfg;
2913         struct ast_variable *v;
2914         struct oh323_peer *peer = NULL;
2915         struct oh323_user *user = NULL;
2916         struct oh323_alias *alias = NULL;
2917         struct ast_hostent ahp; struct hostent *hp;
2918         char *cat;
2919         const char *utype;
2920         int is_user, is_peer, is_alias;
2921         char _gatekeeper[100];
2922         int gk_discover, gk_disable, gk_changed;
2923         struct ast_flags config_flags = { is_reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
2924
2925         cfg = ast_config_load(config, config_flags);
2926
2927         /* We *must* have a config file otherwise stop immediately */
2928         if (!cfg) {
2929                 ast_log(LOG_NOTICE, "Unable to load config %s, H.323 disabled\n", config);
2930                 return 1;
2931         } else if (cfg == CONFIG_STATUS_FILEUNCHANGED) {
2932                 ucfg = ast_config_load("users.conf", config_flags);
2933                 if (ucfg == CONFIG_STATUS_FILEUNCHANGED) {
2934                         return 0;
2935                 } else if (ucfg == CONFIG_STATUS_FILEINVALID) {
2936                         ast_log(LOG_ERROR, "Config file users.conf is in an invalid format.  Aborting.\n");
2937                         return 0;
2938                 }
2939                 ast_clear_flag(&config_flags, CONFIG_FLAG_FILEUNCHANGED);
2940                 if ((cfg = ast_config_load(config, config_flags)) == CONFIG_STATUS_FILEINVALID) {
2941                         ast_log(LOG_ERROR, "Config file %s is in an invalid format.  Aborting.\n", config);
2942                         ast_config_destroy(ucfg);
2943                         return 0;
2944                 }
2945         } else if (cfg == CONFIG_STATUS_FILEINVALID) {
2946                 ast_log(LOG_ERROR, "Config file %s is in an invalid format.  Aborting.\n", config);
2947                 return 0;
2948         } else {
2949                 ast_clear_flag(&config_flags, CONFIG_FLAG_FILEUNCHANGED);
2950                 if ((ucfg = ast_config_load("users.conf", config_flags)) == CONFIG_STATUS_FILEINVALID) {
2951                         ast_log(LOG_ERROR, "Config file users.conf is in an invalid format.  Aborting.\n");
2952                         ast_config_destroy(cfg);
2953                         return 0;
2954                 }
2955         }
2956
2957         if (is_reload) {
2958                 delete_users();
2959                 delete_aliases();
2960                 prune_peers();
2961         }
2962
2963         /* fire up the H.323 Endpoint */
2964         if (!h323_end_point_exist()) {
2965                 h323_end_point_create();
2966         }
2967         ast_copy_string(_gatekeeper, gatekeeper, sizeof(_gatekeeper));
2968         gk_discover = gatekeeper_discover;
2969         gk_disable = gatekeeper_disable;
2970         memset(&bindaddr, 0, sizeof(bindaddr));
2971         memset(&global_options, 0, sizeof(global_options));
2972         global_options.fastStart = 1;
2973         global_options.h245Tunneling = 1;
2974         global_options.dtmfcodec[0] = H323_DTMF_RFC2833_PT;
2975         global_options.dtmfcodec[1] = H323_DTMF_CISCO_PT;
2976         global_options.dtmfmode = 0;
2977         global_options.holdHandling = 0;
2978         global_options.capability = GLOBAL_CAPABILITY;
2979         global_options.bridge = 1;              /* Do native bridging by default */
2980         global_options.autoframing = 0;
2981         strcpy(default_context, "default");
2982         h323_signalling_port = 1720;
2983         gatekeeper_disable = 1;
2984         gatekeeper_discover = 0;
2985         gkroute = 0;
2986         userbyalias = 1;
2987         acceptAnonymous = 1;
2988         tos = 0;
2989         cos = 0;
2990
2991         /* Copy the default jb config over global_jbconf */
2992         memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
2993
2994         if (ucfg) {
2995                 struct ast_variable *gen;
2996                 int genhas_h323;
2997                 const char *has_h323;
2998
2999                 genhas_h323 = ast_true(ast_variable_retrieve(ucfg, "general", "hash323"));
3000                 gen = ast_variable_browse(ucfg, "general");
3001                 for (cat = ast_category_browse(ucfg, NULL); cat; cat = ast_category_browse(ucfg, cat)) {
3002                         if (strcasecmp(cat, "general")) {
3003                                 has_h323 = ast_variable_retrieve(ucfg, cat, "hash323");
3004                                 if (ast_true(has_h323) || (!has_h323 && genhas_h323)) {
3005                                         user = build_user(cat, gen, ast_variable_browse(ucfg, cat), 0);
3006                                         if (user) {
3007                                                 ASTOBJ_CONTAINER_LINK(&userl, user);
3008                                                 ASTOBJ_UNREF(user, oh323_destroy_user);
3009                                         }
3010                                         peer = build_peer(cat, gen, ast_variable_browse(ucfg, cat), 0);
3011                                         if (peer) {
3012                                                 ASTOBJ_CONTAINER_LINK(&peerl, peer);
3013                                                 ASTOBJ_UNREF(peer, oh323_destroy_peer);
3014                                         }
3015                                 }
3016                         }
3017                 }
3018                 ast_config_destroy(ucfg);
3019         }
3020
3021         for (v = ast_variable_browse(cfg, "general"); v; v = v->next) {
3022                 /* handle jb conf */
3023                 if (!ast_jb_read_conf(&global_jbconf, v->name, v->value))
3024                         continue;
3025                 /* Create the interface list */
3026                 if (!strcasecmp(v->name, "port")) {
3027                         h323_signalling_port = (int)strtol(v->value, NULL, 10);
3028                 } else if (!strcasecmp(v->name, "bindaddr")) {
3029                         if (!(hp = ast_gethostbyname(v->value, &ahp))) {
3030                                 ast_log(LOG_WARNING, "Invalid address: %s\n", v->value);
3031                         } else {
3032                                 memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
3033                         }
3034                 } else if (!strcasecmp(v->name, "tos")) {       /* Needs to be removed in next release */
3035                         ast_log(LOG_WARNING, "The \"tos\" setting is deprecated in this version of Asterisk. Please change to \"tos_audio\".\n");
3036                         if (ast_str2tos(v->value, &tos)) {
3037                                 ast_log(LOG_WARNING, "Invalid tos_audio value at line %d, refer to QoS documentation\n", v->lineno);                    
3038                         }
3039                 } else if (!strcasecmp(v->name, "tos_audio")) {
3040                         if (ast_str2tos(v->value, &tos)) {
3041                                 ast_log(LOG_WARNING, "Invalid tos_audio value at line %d, refer to QoS documentation\n", v->lineno);                    
3042                         }
3043                 } else if (!strcasecmp(v->name, "cos")) {
3044                         ast_log(LOG_WARNING, "The \"cos\" setting is deprecated in this version of Asterisk. Please change to \"cos_audio\".\n");
3045                         if (ast_str2cos(v->value, &cos)) {
3046                                 ast_log(LOG_WARNING, "Invalid cos_audio value at line %d, refer to QoS documentation\n", v->lineno);                    
3047                         }
3048                 } else if (!strcasecmp(v->name, "cos_audio")) {
3049                         if (ast_str2cos(v->value, &cos)) {
3050                                 ast_log(LOG_WARNING, "Invalid cos_audio value at line %d, refer to QoS documentation\n", v->lineno);                    
3051                         }
3052                 } else if (!strcasecmp(v->name, "gatekeeper")) {
3053                         if (!strcasecmp(v->value, "DISABLE")) {
3054                                 gatekeeper_disable = 1;
3055                         } else if (!strcasecmp(v->value, "DISCOVER")) {
3056                  &n