Populated RDNIS
[asterisk/asterisk.git] / channels / chan_h323.c
1 /*
2  * chan_h323.c
3  *
4  * OpenH323 Channel Driver for ASTERISK PBX.
5  *                      By Jeremy McNamara
6  *                      For The NuFone Network 
7  *
8  * This code has been derived from code created by
9  *              Michael Manousos and Mark Spencer
10  *
11  * This file is part of the chan_h323 driver for Asterisk
12  *
13  * chan_h323 is free software; you can redistribute it and/or modify
14  * it under the terms of the GNU General Public License as published by
15  * the Free Software Foundation; either version 2 of the License, or
16  * (at your option) any later version. 
17  *
18  * chan_h323 is distributed WITHOUT ANY WARRANTY; without even 
19  * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
20  * PURPOSE. See the GNU General Public License for more details. 
21  *
22  * You should have received a copy of the GNU General Public License
23  * along with this program; if not, write to the Free Software
24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 
25  *
26  * Version Info: $Id$
27  */
28
29
30 #include <stdio.h>
31 #include <pthread.h>
32 #include <string.h>
33 #include <asterisk/lock.h>
34 #include <asterisk/logger.h>
35 #include <asterisk/channel.h>
36 #include <asterisk/channel_pvt.h>
37 #include <asterisk/config.h>
38 #include <asterisk/module.h>
39 #include <asterisk/pbx.h>
40 #include <asterisk/options.h>
41 #include <asterisk/lock.h>
42 #include <asterisk/sched.h>
43 #include <asterisk/io.h>
44 #include <asterisk/rtp.h>
45 #include <asterisk/acl.h>
46 #include <asterisk/callerid.h>
47 #include <asterisk/cli.h>
48 #include <asterisk/dsp.h>
49 #include <sys/socket.h>
50 #include <net/if.h>
51 #include <errno.h>
52 #include <unistd.h>
53 #include <stdlib.h>
54 #include <fcntl.h>
55 #include <netdb.h>
56 #include <sys/signal.h>
57 #include <netinet/ip.h>
58
59
60 #include "h323/chan_h323.h"
61
62 /** String variables required by ASTERISK */
63 static char *type       = "H323";
64 static char *desc       = "The NuFone Network's Open H.323 Channel Driver";
65 static char *tdesc      = "The NuFone Network's Open H.323 Channel Driver";
66 static char *config = "h323.conf";
67
68 static char default_context[AST_MAX_EXTENSION];
69
70 /** H.323 configuration values */
71 static char gatekeeper[100];
72 static int  gatekeeper_disable = 1;
73 static int  gatekeeper_discover = 0;
74 static int  usingGk;
75 static int  port = 1720;
76 static int  gkroute = 0;
77
78 /* to find user by alias is default, alternative is the incomming call's source IP address*/
79 static int  userbyalias = 1;
80
81 static int  bridge_default = 1;
82
83 /* Just about everybody seems to support ulaw, so make it a nice default */
84 static int capability = AST_FORMAT_ULAW;
85
86 /* TOS flag */
87 static int tos = 0;
88
89 static int dtmfmode = H323_DTMF_RFC2833;
90
91 static char secret[50];
92
93 /** Private structure of a OpenH323 channel */
94 struct oh323_pvt {
95         ast_mutex_t lock;                                       /* Channel private lock */
96         call_options_t calloptions;                             /* Options to be used during call setup */
97         int     alreadygone;                                            /* Whether or not we've already been destroyed by or peer */
98         int needdestroy;                                                /* if we need to be destroyed */
99         call_details_t cd;                                              /* Call details */
100         struct ast_channel *owner;                              /* Who owns us */
101         int capability;                                                 /* Special capability */
102         int nonCodecCapability;
103         int outgoing;                                                   /* Outgoing or incoming call? */
104         int nat;                                                                /* Are we talking to a NAT EP?*/
105         int bridge;                                                             /* Determine of we should native bridge or not*/
106         char exten[AST_MAX_EXTENSION];                  /* Requested extension */
107         char context[AST_MAX_EXTENSION];                /* Context where to start */
108         char username[81];                                              /* H.323 alias using this channel */
109         char accountcode[256];                                  /* Account code */
110         int amaflags;                                                   /* AMA Flags */
111         char callerid[80];                                              /* Caller*ID if available */
112         struct ast_rtp *rtp;                                    /* RTP Session */
113         int dtmfmode;
114         struct ast_dsp *vad;                                    /* Used for in-band DTMF detection */
115         struct oh323_pvt *next;                                 /* Next channel in list */
116 } *iflist = NULL;
117
118 static struct ast_user_list {
119         struct oh323_user *users;
120         ast_mutex_t lock;
121 } userl = { NULL, AST_MUTEX_INITIALIZER };
122
123 static struct ast_peer_list {
124         struct oh323_peer *peers;
125         ast_mutex_t lock;
126 } peerl = { NULL, AST_MUTEX_INITIALIZER };
127
128 static struct ast_alias_list {
129         struct oh323_alias *aliases;
130         ast_mutex_t lock;
131 } aliasl = { NULL, AST_MUTEX_INITIALIZER };
132
133 /** Asterisk RTP stuff*/
134 static struct sched_context *sched;
135 static struct io_context *io;
136
137 /** Protect the interface list (of oh323_pvt's) */
138 static ast_mutex_t iflock = AST_MUTEX_INITIALIZER;
139
140 /** Usage counter and associated lock */
141 static int usecnt =0;
142 static ast_mutex_t usecnt_lock = AST_MUTEX_INITIALIZER;
143
144 /* Protect the monitoring thread, so only one process can kill or start it, and not
145    when it's doing something critical. */
146 static ast_mutex_t monlock = AST_MUTEX_INITIALIZER;
147
148 /* This is the thread for the monitor which checks for input on the channels
149    which are not currently in use.  */
150 static pthread_t monitor_thread = AST_PTHREADT_NULL;
151
152 static int restart_monitor(void);
153
154 static void __oh323_destroy(struct oh323_pvt *p)
155 {
156         struct oh323_pvt *cur, *prev = NULL;
157         
158         if (p->rtp) {
159                 ast_rtp_destroy(p->rtp);
160         }
161         
162         /* Unlink us from the owner if we have one */
163         if (p->owner) {
164                 ast_mutex_lock(&p->owner->lock);
165                 ast_log(LOG_DEBUG, "Detaching from %s\n", p->owner->name);
166                 p->owner->pvt->pvt = NULL;
167                 ast_mutex_unlock(&p->owner->lock);
168         }
169         cur = iflist;
170         while(cur) {
171                 if (cur == p) {
172                         if (prev)
173                                 prev->next = cur->next;
174                         else
175                                 iflist = cur->next;
176                         break;
177                 }
178                 prev = cur;
179                 cur = cur->next;
180         }
181         if (!cur) {
182                 ast_log(LOG_WARNING, "%p is not in list?!?! \n", cur);
183         } else
184                 free(p);
185 }
186
187 static void oh323_destroy(struct oh323_pvt *p)
188 {
189         ast_mutex_lock(&iflock);
190         __oh323_destroy(p);
191         ast_mutex_unlock(&iflock);
192 }
193
194 static struct oh323_alias *build_alias(char *name, struct ast_variable *v)
195 {
196         struct oh323_alias *alias;
197
198         alias = (struct oh323_alias *)malloc(sizeof(struct oh323_alias));
199
200         if (alias) {
201                 memset(alias, 0, sizeof(struct oh323_alias));
202                 strncpy(alias->name, name, sizeof(alias->name)-1);
203
204                 while (v) {
205                         if (!strcasecmp(v->name, "e164")) {
206                                 strncpy(alias->e164,  v->value, sizeof(alias->e164)-1);
207                         } else if (!strcasecmp(v->name, "prefix")) {
208                                 strncpy(alias->prefix,  v->value, sizeof(alias->prefix)-1);
209                         } else if (!strcasecmp(v->name, "context")) {
210                                 strncpy(alias->context,  v->value, sizeof(alias->context)-1);
211                         } else if (!strcasecmp(v->name, "secret")) {
212                                 strncpy(alias->secret,  v->value, sizeof(alias->secret)-1);
213                         } else {
214                                 if (strcasecmp(v->value, "h323")) {     
215                                         ast_log(LOG_WARNING, "Keyword %s does not make sense in type=h323\n", v->value);
216                                 }
217                         }
218                         v = v->next;
219                 }
220         }
221         return alias;
222 }
223
224 static struct oh323_user *build_user(char *name, struct ast_variable *v)
225 {
226         struct oh323_user *user;
227         int format;
228         
229         user = (struct oh323_user *)malloc(sizeof(struct oh323_user));
230         if (user) {
231                 memset(user, 0, sizeof(struct oh323_user));
232                 strncpy(user->name, name, sizeof(user->name)-1);
233                 
234                 /* set the usage flag to a sane starting value*/
235                 user->inUse = 0;
236                 /* Assume we can native bridge */
237                 user->bridge = bridge_default; 
238
239                 while(v) {
240                         if (!strcasecmp(v->name, "context")) {
241                                 strncpy(user->context, v->value, sizeof(user->context)-1);
242                         } else if (!strcasecmp(v->name, "bridge")) {
243                                 user->bridge = ast_true(v->value);
244                       } else if (!strcasecmp(v->name, "nat")) {
245                               user->nat = ast_true(v->value);
246                         } else if (!strcasecmp(v->name, "noFastStart")) {
247                                 user->noFastStart = ast_true(v->value);
248                         } else if (!strcasecmp(v->name, "noH245Tunneling")) {
249                                 user->noH245Tunneling = ast_true(v->value);
250                         } else if (!strcasecmp(v->name, "noSilenceSuppression")) {
251                                 user->noSilenceSuppression = ast_true(v->value);
252                         } else if (!strcasecmp(v->name, "secret")) {
253                                 strncpy(user->secret, v->value, sizeof(user->secret)-1);
254                         } else if (!strcasecmp(v->name, "callerid")) {
255                                 strncpy(user->callerid, v->value, sizeof(user->callerid)-1);
256                         } else if (!strcasecmp(v->name, "accountcode")) {
257                                 strncpy(user->accountcode, v->value, sizeof(user->accountcode)-1);
258                         } else if (!strcasecmp(v->name, "incominglimit")) {
259                                 user->incominglimit = atoi(v->value);
260                                 if (user->incominglimit < 0)
261                                         user->incominglimit = 0;
262                         } else if (!strcasecmp(v->name, "host")) {
263                                 if (!strcasecmp(v->value, "dynamic")) {
264                                         ast_log(LOG_ERROR, "Dynamic host configuration not implemented, yet!\n");
265                                         free(user);
266                                         return NULL;
267                                 } else if (ast_get_ip(&user->addr, v->value)) {
268                                         free(user);
269                                         return NULL;
270                                 } 
271                                 /* Let us know we need to use ip authentication */
272                                 user->host = 1;
273                         } else if (!strcasecmp(v->name, "amaflags")) {
274                                 format = ast_cdr_amaflags2int(v->value);
275                                 if (format < 0) {
276                                         ast_log(LOG_WARNING, "Invalid AMA Flags: %s at line %d\n", v->value, v->lineno);
277                                 } else {
278                                         user->amaflags = format;
279                                 }
280                         }
281                         v = v->next;
282                 }
283         }
284         return user;
285 }
286
287
288 static struct oh323_peer *build_peer(char *name, struct ast_variable *v)
289 {
290         struct oh323_peer *peer;
291         struct oh323_peer *prev;
292         int found=0;
293         
294         prev = NULL;
295         ast_mutex_lock(&peerl.lock);
296         peer = peerl.peers;
297
298         while(peer) {
299                 if (!strcasecmp(peer->name, name)) {    
300                         break;
301                 }
302                 prev = peer;
303                 peer = peer->next;
304         }
305
306         if (peer) {
307                 found++;
308                 /* Already in the list, remove it and it will be added back (or FREE'd) */
309                 if (prev) {
310                         prev->next = peer->next;
311                 } else {
312                         peerl.peers = peer->next;
313                 }
314                 ast_mutex_unlock(&peerl.lock);
315         } else {
316                 ast_mutex_unlock(&peerl.lock);
317                 peer = malloc(sizeof(struct oh323_peer));
318                 memset(peer, 0, sizeof(struct oh323_peer));
319         }
320         if (peer) {
321                 if (!found) {
322                         strncpy(peer->name, name, sizeof(peer->name)-1);
323                 }
324                 
325                 /* set the usage flag to a sane starting value*/
326                 peer->inUse = 0;
327
328                 while(v) {
329                         if (!strcasecmp(v->name, "context")) {
330                                 strncpy(peer->context, v->value, sizeof(peer->context)-1);
331                         }  else if (!strcasecmp(v->name, "bridge")) {
332                                 peer->bridge = ast_true(v->value);
333                         } else if (!strcasecmp(v->name, "noFastStart")) {
334                                 peer->noFastStart = ast_true(v->value);
335                         } else if (!strcasecmp(v->name, "noH245Tunneling")) {
336                                 peer->noH245Tunneling = ast_true(v->value);
337                         } else if (!strcasecmp(v->name, "noSilenceSuppression")) {
338                                 peer->noSilenceSuppression = ast_true(v->value);
339                         } else if (!strcasecmp(v->name, "outgoinglimit")) {
340                                 peer->outgoinglimit = atoi(v->value);
341                                 if (peer->outgoinglimit > 0)
342                                         peer->outgoinglimit = 0;
343                         } else if (!strcasecmp(v->name, "host")) {
344                                 if (!strcasecmp(v->value, "dynamic")) {
345                                         ast_log(LOG_ERROR, "Dynamic host configuration not implemented, yet!\n");
346                                         free(peer);
347                                         return NULL;
348                                 }
349                                 if (ast_get_ip(&peer->addr, v->value)) {
350                                                 free(peer);
351                                                 return NULL;
352                                 }
353                         } 
354                         v=v->next;
355                 }
356         }
357         return peer;
358 }
359
360
361
362 /**
363  * Send (play) the specified digit to the channel.
364  * 
365  */
366 static int oh323_digit(struct ast_channel *c, char digit)
367 {
368         struct oh323_pvt *p = c->pvt->pvt;
369         if (p && p->rtp && (p->dtmfmode & H323_DTMF_RFC2833)) {
370                 ast_rtp_senddigit(p->rtp, digit);
371         }
372         /* If in-band DTMF is desired, send that */
373         if (p->dtmfmode & H323_DTMF_INBAND)
374                 h323_send_tone(p->cd.call_token, digit);
375         return 0;
376 }
377
378
379 /**
380  * Make a call over the specified channel to the specified 
381  * destination. This function will parse the destination string
382  * and determine the address-number to call.
383  * Return -1 on error, 0 on success.
384  */
385 static int oh323_call(struct ast_channel *c, char *dest, int timeout)
386 {
387         int res;
388         struct oh323_pvt *p = c->pvt->pvt;
389         char called_addr[256];
390         char *tmp;
391
392         strtok_r(dest, "/", &(tmp));
393
394         ast_log(LOG_DEBUG, "dest=%s, timeout=%d.\n", dest, timeout);
395
396         if ((c->_state != AST_STATE_DOWN) && (c->_state != AST_STATE_RESERVED)) {
397                 ast_log(LOG_WARNING, "Line is already in use (%s)\n", c->name);
398                 return -1;
399         }
400         
401         /* outgoing call */
402         p->outgoing = 1;
403
404         /* Clear the call token */
405         if ((p->cd).call_token == NULL)
406                 (p->cd).call_token = (char *)malloc(128);
407
408         memset((char *)(p->cd).call_token, 0, 128);
409         
410         if (p->cd.call_token == NULL) {
411                 ast_log(LOG_ERROR, "Not enough memory.\n");
412                 return -1;
413         }
414
415         /* Build the address to call */
416         memset(called_addr, 0, sizeof(dest));
417         memcpy(called_addr, dest, sizeof(called_addr));
418
419         /* Copy callerid, if there is any */
420         if (c->callerid) {
421                 char *tmp = strchr(c->callerid, '"');
422                 if (!tmp) {
423                         p->calloptions.callerid = malloc(80); // evil
424                         // sprintf(p->calloptions.callerid, "\"%s\"", c->callerid);
425                         sprintf(p->calloptions.callerid, "\"\" <%s>", c->callerid);
426                 } else {
427                         p->calloptions.callerid = strdup(c->callerid);
428                 }       
429          }
430
431         res = h323_make_call(called_addr, &(p->cd), p->calloptions);
432
433         if (res) {
434                 ast_log(LOG_NOTICE, "h323_make_call failed(%s)\n", c->name);
435                 return -1;
436         }
437
438         ast_setstate(c, AST_STATE_RINGING);
439         return 0;
440 }
441
442
443 static int oh323_answer(struct ast_channel *c)
444 {
445         int res;
446
447         struct oh323_pvt *p = c->pvt->pvt;
448
449         res = h323_answering_call(p->cd.call_token, 0);
450         
451         if (c->_state != AST_STATE_UP)
452                 ast_setstate(c, AST_STATE_UP);
453
454         return res;
455 }
456
457 static int oh323_hangup(struct ast_channel *c)
458 {
459         struct oh323_pvt *p = c->pvt->pvt;
460         int needcancel = 0;
461         if (h323debug)
462                 ast_log(LOG_DEBUG, "oh323_hangup(%s)\n", c->name);
463         if (!c->pvt->pvt) {
464                 ast_log(LOG_DEBUG, "Asked to hangup channel not connected\n");
465                 return 0;
466         }
467         ast_mutex_lock(&p->lock);
468         /* Determine how to disconnect */
469         if (p->owner != c) {
470                 ast_log(LOG_WARNING, "Huh?  We aren't the owner?\n");
471                 ast_mutex_unlock(&p->lock);
472                 return 0;
473         }
474         if (!c || (c->_state != AST_STATE_UP))
475                 needcancel = 1;
476         /* Disconnect */
477         p = c->pvt->pvt;
478         
479         /* Free dsp used for in-band DTMF detection */
480         if (p->vad) {
481                 ast_dsp_free(p->vad);
482         }
483
484         p->owner = NULL;
485         c->pvt->pvt = NULL;
486
487         /* Start the process if it's not already started */
488         if (!p->alreadygone) {
489                 p->needdestroy = 1;
490                 if (h323_clear_call((p->cd).call_token)) { 
491                         ast_log(LOG_DEBUG, "ClearCall failed.\n");
492                 }
493         }
494
495         /* Update usage counter */
496         ast_mutex_lock(&usecnt_lock);
497         usecnt--;
498         if (usecnt < 0)
499                 ast_log(LOG_WARNING, "Usecnt < 0\n");
500         ast_mutex_unlock(&usecnt_lock);
501         ast_update_use_count();
502
503         ast_mutex_unlock(&p->lock);
504         return 0;
505 }
506
507 static struct ast_frame *oh323_rtp_read(struct oh323_pvt *p)
508 {
509         /* Retrieve audio/etc from channel.  Assumes p->lock is already held. */
510         struct ast_frame *f;
511         static struct ast_frame null_frame = { AST_FRAME_NULL, };
512
513       /* Only apply it for the first packet, we just need the correct ip/port */
514       if(p->nat)
515       {
516               ast_rtp_setnat(p->rtp,p->nat);
517               p->nat = 0;
518       }
519
520         f = ast_rtp_read(p->rtp);
521         /* Don't send RFC2833 if we're not supposed to */
522         if (f && (f->frametype == AST_FRAME_DTMF) && !(p->dtmfmode & H323_DTMF_RFC2833))
523                 return &null_frame;
524         if (p->owner) {
525                 /* We already hold the channel lock */
526                 if (f->frametype == AST_FRAME_VOICE) {
527                         if (f->subclass != p->owner->nativeformats) {
528                                 ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
529                                 p->owner->nativeformats = f->subclass;
530                                 ast_set_read_format(p->owner, p->owner->readformat);
531                                 ast_set_write_format(p->owner, p->owner->writeformat);
532                         }
533                 
534                         /* Do in-band DTMF detection */
535                         if (p->dtmfmode & H323_DTMF_INBAND) {
536                    f = ast_dsp_process(p->owner,p->vad,f,0);
537                                    if (f->frametype == AST_FRAME_DTMF)
538                                         ast_log(LOG_DEBUG, "Got in-band digit %c.\n", f->subclass);
539             }
540                         
541                         
542                 }
543         }
544         return f;
545 }
546
547
548 static struct ast_frame  *oh323_read(struct ast_channel *c)
549 {
550         struct ast_frame *fr;
551         struct oh323_pvt *p = c->pvt->pvt;
552         ast_mutex_lock(&p->lock);
553         fr = oh323_rtp_read(p);
554         ast_mutex_unlock(&p->lock);
555         return fr;
556 }
557
558 static int oh323_write(struct ast_channel *c, struct ast_frame *frame)
559 {
560         struct oh323_pvt *p = c->pvt->pvt;
561         int res = 0;
562         if (frame->frametype != AST_FRAME_VOICE) {
563                 if (frame->frametype == AST_FRAME_IMAGE)
564                         return 0;
565                 else {
566                         ast_log(LOG_WARNING, "Can't send %d type frames with H323 write\n", frame->frametype);
567                         return 0;
568                 }
569         } else {
570                 if (!(frame->subclass & c->nativeformats)) {
571                         ast_log(LOG_WARNING, "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
572                                 frame->subclass, c->nativeformats, c->readformat, c->writeformat);
573                         return -1;
574                 }
575         }
576         if (p) {
577                 ast_mutex_lock(&p->lock);
578                 if (p->rtp) {
579                         res =  ast_rtp_write(p->rtp, frame);
580                 }
581                 ast_mutex_unlock(&p->lock);
582         }
583         return res;
584 }
585
586 /** FIXME: Can I acutally use this or does Open H.323 take care of everything? */
587 static int oh323_indicate(struct ast_channel *c, int condition)
588 {
589
590         struct oh323_pvt *p = c->pvt->pvt;
591         
592         switch(condition) {
593         case AST_CONTROL_RINGING:
594                 if (c->_state == AST_STATE_RING) {
595                 //      transmit_response(p, "180 Ringing", &p->initreq);
596                         break;
597                 }
598                 return 0;
599         case AST_CONTROL_BUSY:
600                 if (c->_state != AST_STATE_UP) {
601                 //      transmit_response(p, "600 Busy everywhere", &p->initreq);
602                         p->alreadygone = 1;
603                         ast_softhangup(c, AST_SOFTHANGUP_DEV);
604                         break;
605                 }
606                 return 0;
607         case AST_CONTROL_CONGESTION:
608                 if (c->_state != AST_STATE_UP) {
609                 //      transmit_response(p, "486 Busy here", &p->initreq);
610                         p->alreadygone = 1;
611                         ast_softhangup(c, AST_SOFTHANGUP_DEV);
612                         break;
613                 }
614                 return 0;
615         case -1:
616                 return -1;
617         default:
618                 ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", condition);
619                 return -1;
620         }
621         return 0;
622 }
623
624 // FIXME: WTF is this? Do I need this???
625 static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan, int needlock)
626 {
627         struct oh323_pvt *p = newchan->pvt->pvt;
628
629         if (needlock)
630                 ast_mutex_lock(&p->lock);
631         if (p->owner != oldchan) {
632                 ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, p->owner);
633                 return -1;
634         }
635         p->owner = newchan;
636         if (needlock)
637                 ast_mutex_unlock(&p->lock);
638         return 0;
639 }
640
641 static struct ast_channel *oh323_new(struct oh323_pvt *i, int state, const char *host)
642 {
643         struct ast_channel *ch;
644         int fmt;
645         ch = ast_channel_alloc(1);
646         
647         if (ch) {
648                 
649                 snprintf(ch->name, sizeof(ch->name)-1, "H323/%s", host);
650                 ch->nativeformats = i->capability;
651                 if (!ch->nativeformats)
652                         ch->nativeformats = capability;
653                 fmt = ast_best_codec(ch->nativeformats);
654                 ch->type = type;
655                 ch->fds[0] = ast_rtp_fd(i->rtp);
656                 ast_setstate(ch, state);
657                 
658                 if (state == AST_STATE_RING)
659                         ch->rings = 1;
660                 
661                 ch->writeformat = fmt;
662                 ch->pvt->rawwriteformat = fmt;
663                 ch->readformat = fmt;
664                 ch->pvt->rawreadformat = fmt;
665                 
666                 /* Allocate dsp for in-band DTMF support */
667                 if (i->dtmfmode & H323_DTMF_INBAND) {
668                         i->vad = ast_dsp_new();
669                         ast_dsp_set_features(i->vad, DSP_FEATURE_DTMF_DETECT);
670                 }
671
672                 /* Register the OpenH323 channel's functions. */
673                 ch->pvt->pvt = i;
674                 ch->pvt->send_digit = oh323_digit;
675                 ch->pvt->call = oh323_call;
676                 ch->pvt->hangup = oh323_hangup;
677                 ch->pvt->answer = oh323_answer;
678                 ch->pvt->read = oh323_read;
679                 ch->pvt->write = oh323_write;
680                 ch->pvt->indicate = oh323_indicate;
681                 ch->pvt->fixup = oh323_fixup;
682 //              ch->pvt->bridge = ast_rtp_bridge;
683
684                 /*  Set the owner of this channel */
685                 i->owner = ch;
686                 
687                 ast_mutex_lock(&usecnt_lock);
688                 usecnt++;
689                 ast_mutex_unlock(&usecnt_lock);
690                 ast_update_use_count();
691                 strncpy(ch->context, i->context, sizeof(ch->context)-1);
692                 strncpy(ch->exten, i->exten, sizeof(ch->exten)-1);              
693                 ch->priority = 1;
694                 if (strlen(i->callerid))
695                         ch->callerid = strdup(i->callerid);
696                 if (strlen(i->accountcode))
697                         strncpy(ch->accountcode, i->accountcode, sizeof(ch->accountcode)-1);
698                 if (i->amaflags)
699                         ch->amaflags = i->amaflags;
700                 if (state != AST_STATE_DOWN) {
701                         if (ast_pbx_start(ch)) {
702                                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", ch->name);
703                                 ast_hangup(ch);
704                                 ch = NULL;
705                         }
706                 }
707         } else
708                 ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
709         return ch;
710 }
711
712 static struct oh323_pvt *oh323_alloc(int callid)
713 {
714         struct oh323_pvt *p;
715
716         p = malloc(sizeof(struct oh323_pvt));
717         if (!p) {
718                 ast_log(LOG_ERROR, "Couldn't allocate private structure. This is bad\n");
719                 return NULL;
720         }
721
722         /* Keep track of stuff */
723         memset(p, 0, sizeof(struct oh323_pvt));
724         p->rtp = ast_rtp_new(sched, io, 1, 0);
725
726         if (!p->rtp) {
727                 ast_log(LOG_WARNING, "Unable to create RTP session: %s\n", strerror(errno));
728                 free(p);
729                 return NULL;
730         }
731         ast_rtp_settos(p->rtp, tos);
732         ast_mutex_init(&p->lock);
733         
734         p->cd.call_reference = callid;
735         p->bridge = bridge_default;
736         
737         p->dtmfmode = dtmfmode;
738         if (p->dtmfmode & H323_DTMF_RFC2833)
739                 p->nonCodecCapability |= AST_RTP_DTMF;
740
741         /* Add to interface list */
742         ast_mutex_lock(&iflock);
743         p->next = iflist;
744         iflist = p;
745         ast_mutex_unlock(&iflock);
746         return p;
747 }
748
749 static struct oh323_pvt *find_call(int call_reference)
750 {  
751         struct oh323_pvt *p;
752
753                 ast_mutex_lock(&iflock);
754         p = iflist; 
755
756         while(p) {
757                 if (p->cd.call_reference == call_reference) {
758                         /* Found the call */                                            
759                                                 ast_mutex_unlock(&iflock);
760                                                 return p;
761                 }
762                 p = p->next; 
763         }
764         ast_mutex_unlock(&iflock);
765                 return NULL;
766         
767 }
768
769 static struct ast_channel *oh323_request(char *type, int format, void *data)
770 {
771
772         int oldformat;
773         struct oh323_pvt *p;
774         struct ast_channel *tmpc = NULL;
775         char *dest = data;
776         char *ext, *host;
777         char *h323id = NULL;
778         char tmp[256];
779
780         
781         ast_log(LOG_DEBUG, "type=%s, format=%d, data=%s.\n", type, format, (char *)data);
782
783         oldformat = format;
784         format &= capability;
785         if (!format) {
786                 ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", format);
787                 return NULL;
788         }
789         
790         strncpy(tmp, dest, sizeof(tmp) - 1);
791                 
792         host = strchr(tmp, '@');
793         if (host) {
794                 *host = '\0';
795                 host++;
796                 ext = tmp;
797         } else {
798                 host = tmp;
799                 ext = NULL;
800         }
801
802         strtok_r(host, "/", &(h323id));
803                 
804         if (*h323id) {
805                 h323_set_id(h323id);
806         }
807                 
808         
809         p = oh323_alloc(0);
810
811         if (!p) {
812                 ast_log(LOG_WARNING, "Unable to build pvt data for '%s'\n", (char *)data);
813                 return NULL;
814         }
815
816         /* Assign a default capability */
817         p->capability = capability;
818
819         if (p->dtmfmode) {
820                 if (p->dtmfmode & H323_DTMF_RFC2833)
821                         p->nonCodecCapability |= AST_RTP_DTMF;
822                 else
823                         p->nonCodecCapability &= ~AST_RTP_DTMF;
824         }
825
826         if (ext) {
827                 strncpy(p->username, ext, sizeof(p->username) - 1);
828         }
829         ast_log(LOG_DEBUG, "Host: %s\tUsername: %s\n", host, p->username);
830
831         tmpc = oh323_new(p, AST_STATE_DOWN, host);
832         if (!tmpc)
833                 oh323_destroy(p);
834         
835         restart_monitor();
836         
837         return tmpc;
838 }
839
840 struct oh323_alias *find_alias(const char *source_aliases)
841 {
842         struct oh323_alias *a;
843
844         a = aliasl.aliases;
845
846         while(a) {
847
848                 if (!strcasecmp(a->name, source_aliases)) {
849                         break;
850                 }
851                 a = a->next;
852         }
853         return a;
854 }
855
856 struct oh323_user *find_user(const call_details_t cd)
857 {
858         struct oh323_user *u;
859
860         u = userl.users;
861         if(userbyalias == 1){
862                 while(u) {
863                         if (!strcasecmp(u->name, cd.call_source_aliases)) {
864                                 break;
865                         }
866                         u = u->next;
867                 }
868
869         } else {
870                 while(u) {
871                         if (!strcasecmp(cd.sourceIp, inet_ntoa(u->addr.sin_addr))) {
872                                 break;
873                         }
874                         u = u->next;
875                 }
876
877         
878         }
879         return u;
880
881 }
882
883 struct oh323_peer *find_peer(char *dest_peer)
884 {
885         struct oh323_peer *p;
886
887         p = peerl.peers;
888
889         while(p) {
890                 if (!strcasecmp(p->name, dest_peer)) {
891                         break;
892                 }
893                 p = p->next;
894         }
895         return p;
896
897 }
898
899 /**
900   * Callback for sending digits from H.323 up to asterisk
901   *
902   */
903 int send_digit(unsigned call_reference, char digit)
904 {
905         struct oh323_pvt *p;
906         struct ast_frame f;
907
908         ast_log(LOG_DEBUG, "Recieved Digit: %c\n", digit);
909         p = find_call(call_reference);
910         
911         if (!p) {
912                 ast_log(LOG_ERROR, "Private structure not found in send_digit.\n");
913                 return -1;
914         }
915         memset(&f, 0, sizeof(f));
916         f.frametype = AST_FRAME_DTMF;
917     f.subclass = digit;
918     f.datalen = 0;
919     f.samples = 300;
920         f.offset = 0;
921         f.data = NULL;
922     f.mallocd = 0;
923     f.src = "SEND_DIGIT";
924         
925         return ast_queue_frame(p->owner, &f, 1);        
926 }
927
928 /**
929   * Call-back function that gets called when any H.323 connection is made
930   *
931   * Returns the local RTP information
932   */
933 struct rtp_info *create_connection(unsigned call_reference)
934 {       
935         struct oh323_pvt *p;
936         struct sockaddr_in us;
937         struct sockaddr_in them;
938         struct rtp_info *info;
939
940         info = malloc(sizeof(struct rtp_info));
941
942         p = find_call(call_reference);
943
944         if (!p) {
945                 ast_log(LOG_ERROR, "Unable to allocate private structure, this is very bad.\n");
946                 return NULL;
947         }
948
949         /* figure out our local RTP port and tell the H.323 stack about it*/
950         ast_rtp_get_us(p->rtp, &us);
951         ast_rtp_get_peer(p->rtp, &them);
952
953
954         info->addr = inet_ntoa(us.sin_addr);
955         info->port = ntohs(us.sin_port);
956
957
958         return info;
959 }
960
961 /**
962  *  Call-back function for incoming calls
963  *
964  *  Returns 1 on success
965  */
966
967 int setup_incoming_call(call_details_t cd)
968 {
969         
970         struct oh323_pvt *p = NULL;
971         struct ast_channel *c = NULL;
972         struct oh323_user *user = NULL;
973         struct oh323_alias *alias = NULL;
974
975         /* allocate the call*/
976         p = oh323_alloc(cd.call_reference);
977
978         if (!p) {
979                 ast_log(LOG_ERROR, "Unable to allocate private structure, this is bad.\n");
980                 return 0;
981         }
982
983         /* Populate the call details in the private structure */
984         p->cd.call_token = cd.call_token;
985         p->cd.call_source_aliases = cd.call_source_aliases;
986         p->cd.call_dest_alias = cd.call_dest_alias;
987         p->cd.call_source_e164 = cd.call_source_e164;
988         p->cd.call_dest_e164 = cd.call_dest_e164;
989
990         if (h323debug) {
991                 ast_verbose(VERBOSE_PREFIX_3 "Setting up Call\n");
992                 ast_verbose(VERBOSE_PREFIX_3 "     Call token:  [%s]\n", p->cd.call_token);
993                 ast_verbose(VERBOSE_PREFIX_3 "     Calling party name:  [%s]\n", p->cd.call_source_aliases);
994                 ast_verbose(VERBOSE_PREFIX_3 "     Calling party number:  [%s]\n", p->cd.call_source_e164);
995                 ast_verbose(VERBOSE_PREFIX_3 "     Called  party name:  [%s]\n", p->cd.call_dest_alias);
996                 ast_verbose(VERBOSE_PREFIX_3 "     Called  party number:  [%s]\n", p->cd.call_dest_e164);
997         }
998
999         /* Decide if we are allowing Gatekeeper routed calls*/
1000         if ((!strcasecmp(cd.sourceIp, gatekeeper)) && (gkroute == -1) && (usingGk == 1)) {
1001                 
1002                 if (strlen(cd.call_dest_e164)) {
1003                         strncpy(p->exten, cd.call_dest_e164, sizeof(p->exten)-1);
1004                         strncpy(p->context, default_context, sizeof(p->context)-1); 
1005                 } else {
1006                         alias = find_alias(cd.call_dest_alias);
1007                 
1008                         if (!alias) {
1009                                 ast_log(LOG_ERROR, "Call for %s rejected, alias not found\n", cd.call_dest_alias);
1010                                 return 0;
1011                         }
1012                         strncpy(p->exten, alias->name, sizeof(p->exten)-1);
1013                         strncpy(p->context, alias->context, sizeof(p->context)-1);
1014                 }
1015
1016
1017                 sprintf(p->callerid, "%s <%s>", p->cd.call_source_aliases, p->cd.call_source_e164);
1018
1019         } else { 
1020                 /* Either this call is not from the Gatekeeper 
1021                    or we are not allowing gk routed calls */
1022                 
1023
1024                 user  = find_user(cd);
1025
1026
1027                 if (!user) {
1028                         sprintf(p->callerid, "%s <%s>", p->cd.call_source_aliases, p->cd.call_source_e164); 
1029                         if (strlen(p->cd.call_dest_e164)) {
1030                                 strncpy(p->exten, cd.call_dest_e164, sizeof(p->exten)-1);
1031                         } else {
1032                                 strncpy(p->exten, cd.call_dest_alias, sizeof(p->exten)-1);              
1033                         }
1034                         if (!strlen(default_context)) {
1035                                 ast_log(LOG_ERROR, "Call from user '%s' rejected due to no default context\n", p->cd.call_source_aliases);
1036                                 return 0;
1037                         }
1038                         strncpy(p->context, default_context, sizeof(p->context)-1);
1039                         ast_log(LOG_DEBUG, "Sending %s to context [%s]\n", cd.call_source_aliases, p->context);
1040                 } else {                                        
1041                         if (user->host) {
1042                                 if (strcasecmp(cd.sourceIp, inet_ntoa(user->addr.sin_addr))){
1043                                         
1044                                         if(!strlen(default_context)) {
1045                                                 ast_log(LOG_ERROR, "Call from user '%s' rejected due to non-matching IP address of '%s'\n", user->name, cd.sourceIp);
1046                                                 return 0;
1047                                         }
1048                                         
1049                                         strncpy(p->context, default_context, sizeof(p->context)-1);
1050                                         sprintf(p->exten,"i");
1051
1052                                         goto exit;                                      
1053                                 }
1054                         }
1055                         if (user->incominglimit > 0) {
1056                                 if (user->inUse >= user->incominglimit) {
1057                                         ast_log(LOG_ERROR, "Call from user '%s' rejected due to usage limit of %d\n", user->name, user->incominglimit);
1058                                         return 0;
1059                                 }
1060                         }
1061                         strncpy(p->context, user->context, sizeof(p->context)-1);
1062                         p->bridge = user->bridge;
1063                       p->nat = user->nat;
1064
1065                         if (strlen(user->callerid)) 
1066                                 strncpy(p->callerid, user->callerid, sizeof(p->callerid) - 1);
1067                         else
1068                                 sprintf(p->callerid, "%s <%s>", p->cd.call_source_aliases, p->cd.call_source_e164); 
1069
1070                         if (strlen(p->cd.call_dest_e164)) {
1071                                 strncpy(p->exten, cd.call_dest_e164, sizeof(p->exten)-1);
1072                         } else {
1073                                 strncpy(p->exten, cd.call_dest_alias, sizeof(p->exten)-1);              
1074                         }
1075                         if (strlen(user->accountcode)) {
1076                                 strncpy(p->accountcode, user->accountcode, sizeof(p->accountcode)-1);
1077                         } 
1078
1079                         /* Increment the usage counter */
1080                         user->inUse++;
1081                 } 
1082         }
1083
1084 /* I know this is horrid, don't kill me saddam */
1085 exit:
1086         /* allocate a channel and tell asterisk about it */
1087         c = oh323_new(p, AST_STATE_RINGING, cd.call_token);
1088         if (!c) {
1089                 ast_log(LOG_ERROR, "Couldn't create channel. This is bad\n");
1090                 return 0;
1091         }
1092
1093         return 1;
1094 }
1095
1096 /**
1097  * Call-back function to establish an outgoing H.323 call
1098  * 
1099  * Returns 1 on success 
1100  */
1101 int setup_outgoing_call(call_details_t cd)
1102 {       
1103         return 1;
1104 }
1105
1106 #if 0
1107 if (p->inUse >= p->outgoinglimit) {
1108         ast_log(LOG_ERROR, "Call to %s rejected due to usage limit of %d outgoing channels\n", p->name, p->inUse);
1109         return 0;
1110 }
1111
1112 if (!p) {
1113         ast_log(LOG_ERROR, "Rejecting call: peer %s not found\n", dest_peer);
1114         return 0;
1115 }
1116 #endif
1117
1118 /**
1119   * Call-back function that gets called for each rtp channel opened 
1120   *
1121   * Returns nothing 
1122   */
1123 void setup_rtp_connection(unsigned call_reference, const char *remoteIp, int remotePort)
1124 {
1125         struct oh323_pvt *p = NULL;
1126         struct sockaddr_in them;
1127
1128         /* Find the call or allocate a private structure if call not found */
1129         p = find_call(call_reference);
1130
1131         if (!p) {
1132                 ast_log(LOG_ERROR, "Something is wrong: rtp\n");
1133                 return;
1134         }
1135
1136         them.sin_family = AF_INET;
1137         them.sin_addr.s_addr = inet_addr(remoteIp); // only works for IPv4
1138         them.sin_port = htons(remotePort);
1139         ast_rtp_set_peer(p->rtp, &them);
1140
1141         return;
1142 }
1143
1144 /**  
1145   *     Call-back function to signal asterisk that the channel has been answered 
1146   * Returns nothing
1147   */
1148 void connection_made(unsigned call_reference)
1149 {
1150         struct ast_channel *c = NULL;
1151         struct oh323_pvt *p = NULL;
1152         
1153         p = find_call(call_reference);
1154         
1155         if (!p)
1156                 ast_log(LOG_ERROR, "Something is wrong: connection\n");
1157
1158
1159         if (!p->owner) {
1160                 ast_log(LOG_ERROR, "Channel has no owner\n");
1161                 return;
1162         }
1163         c = p->owner;   
1164
1165         ast_setstate(c, AST_STATE_UP);
1166         return;
1167 }
1168
1169 /**
1170   * Call-back function to cleanup communication
1171   * Returns nothing,
1172   */
1173 void cleanup_connection(call_details_t cd)
1174 {       
1175         struct oh323_pvt *p = NULL;
1176 //      struct oh323_peer *peer = NULL;
1177         struct oh323_user *user = NULL;
1178         struct ast_rtp *rtp = NULL;
1179
1180         ast_log(LOG_DEBUG, "Cleaning up our mess\n");
1181         
1182         p = find_call(cd.call_reference);
1183
1184         if (!p) {
1185                 return;
1186         }
1187
1188         /* Decrement usage counter */
1189         if (!p->outgoing) {
1190                 user = find_user(cd);
1191                 
1192                 if(user)
1193                         user->inUse--;
1194         }
1195
1196 #if 0
1197                 if (p->outgoing) {
1198                 peer = find_peer(cd.call_dest_alias);
1199                 peer->inUse--;
1200         } else {
1201                 user = find_user(cd);
1202                 user->inUse--;
1203         }
1204 #endif
1205         
1206         if (p->rtp) {
1207                 rtp = p->rtp;
1208                 p->rtp = NULL;
1209                 /* Immediately stop RTP */
1210                 ast_rtp_destroy(rtp);
1211         }
1212         
1213         p->alreadygone = 1;
1214
1215         /* Send hangup */       
1216         if (p->owner)
1217                 ast_queue_hangup(p->owner, 1);
1218
1219         p = NULL;
1220         return; 
1221 }
1222
1223 static void *do_monitor(void *data)
1224 {
1225         int res;
1226         struct oh323_pvt *oh323 = NULL;
1227         
1228                 for(;;) {
1229                 /* Check for interfaces needing to be killed */
1230                 ast_mutex_lock(&iflock);
1231 restartsearch:          
1232                 oh323 = iflist;
1233                 while(oh323) {
1234                         if (oh323->needdestroy) {
1235                                 __oh323_destroy(oh323);
1236                                 goto restartsearch;
1237                         }
1238                         oh323 = oh323->next;
1239                 }
1240                 ast_mutex_unlock(&iflock);
1241
1242                 /* Wait for sched or io */
1243                 res = ast_sched_wait(sched);
1244                 if ((res < 0) || (res > 1000))
1245                         res = 1000;
1246                 res = ast_io_wait(io, res);
1247
1248                 pthread_testcancel();
1249
1250                 ast_mutex_lock(&monlock);
1251                 if (res >= 0) 
1252                         ast_sched_runq(sched);
1253                 ast_mutex_unlock(&monlock);
1254         }
1255         /* Never reached */
1256         return NULL;
1257         
1258 }
1259
1260 static int restart_monitor(void)
1261 {
1262         /* If we're supposed to be stopped -- stay stopped */
1263         if (monitor_thread == AST_PTHREADT_STOP)
1264                 return 0;
1265         if (ast_mutex_lock(&monlock)) {
1266                 ast_log(LOG_WARNING, "Unable to lock monitor\n");
1267                 return -1;
1268         }
1269         if (monitor_thread == pthread_self()) {
1270                 ast_mutex_unlock(&monlock);
1271                 ast_log(LOG_WARNING, "Cannot kill myself\n");
1272                 return -1;
1273         }
1274         if (monitor_thread && (monitor_thread != AST_PTHREADT_NULL)) {
1275                 /* Wake up the thread */
1276                 pthread_kill(monitor_thread, SIGURG);
1277         } else {
1278                 /* Start a new monitor */
1279                 if (pthread_create(&monitor_thread, NULL, do_monitor, NULL) < 0) {
1280                         ast_mutex_unlock(&monlock);
1281                         ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
1282                         return -1;
1283                 }
1284         }
1285         ast_mutex_unlock(&monlock);
1286         return 0;
1287 }
1288
1289 static int h323_do_trace(int fd, int argc, char *argv[])
1290 {
1291         if (argc != 3) {
1292                 return RESULT_SHOWUSAGE;
1293         }
1294         h323_debug(1, atoi(argv[2]));
1295         ast_cli(fd, "H.323 trace set to level %s\n", argv[2]);
1296         return RESULT_SUCCESS;
1297 }
1298
1299 static int h323_no_trace(int fd, int argc, char *argv[])
1300 {
1301         if (argc != 3) {
1302                 return RESULT_SHOWUSAGE;
1303         }
1304         h323_debug(0,0);
1305         ast_cli(fd, "H.323 trace disabled\n");
1306         return RESULT_SUCCESS;
1307 }
1308
1309 static int h323_do_debug(int fd, int argc, char *argv[])
1310 {
1311         if (argc != 2) {
1312                 return RESULT_SHOWUSAGE;
1313         }
1314         h323debug = 1;
1315         ast_cli(fd, "H323 debug enabled\n");
1316         return RESULT_SUCCESS;
1317 }
1318
1319 static int h323_no_debug(int fd, int argc, char *argv[])
1320 {
1321         if (argc != 3) {
1322                 return RESULT_SHOWUSAGE;
1323         }
1324         h323debug = 0;
1325         ast_cli(fd, "H323 Debug disabled\n");
1326         return RESULT_SUCCESS;
1327 }
1328
1329 static int h323_gk_cycle(int fd, int argc, char *argv[])
1330 {
1331         return RESULT_SUCCESS;
1332 #if 0
1333         if (argc != 3) {
1334                 return RESULT_SHOWUSAGE;
1335         }       
1336         h323_gk_urq();
1337         
1338         /* Possibly register with a GK */
1339         if (!gatekeeper_disable) {
1340                 if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
1341                         ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
1342                 }
1343         }
1344         return RESULT_SUCCESS;
1345 #endif
1346 }
1347
1348 static int h323_ep_hangup(int fd, int argc, char *argv[])
1349 {
1350
1351         if (argc != 3) {
1352                 return RESULT_SHOWUSAGE;
1353         }
1354
1355         if (h323_soft_hangup(argv[2])) {
1356                 ast_verbose(VERBOSE_PREFIX_3 "Hangup succeeded on %s\n", argv[2]);
1357         } else { 
1358                 ast_verbose(VERBOSE_PREFIX_3 "Hangup failed for %s\n", argv[2]);
1359         }
1360
1361         return RESULT_SUCCESS;
1362 }
1363
1364 static int h323_tokens_show(int fd, int argc, char *argv[])
1365 {
1366
1367         if (argc != 3) {
1368                 return RESULT_SHOWUSAGE;
1369         }
1370         h323_show_tokens();
1371
1372         return RESULT_SUCCESS;
1373 }
1374
1375
1376 static char trace_usage[] = 
1377 "Usage: h.323 trace <level num>\n"
1378 "       Enables H.323 stack tracing for debugging purposes\n";
1379
1380 static char no_trace_usage[] = 
1381 "Usage: h.323 no trace\n"
1382 "       Disables H.323 stack tracing for debugging purposes\n";
1383
1384 static char debug_usage[] = 
1385 "Usage: h.323 debug\n"
1386 "       Enables chan_h323 debug output\n";
1387
1388 static char no_debug_usage[] = 
1389 "Usage: h.323 no debug\n"
1390 "       Disables chan_h323 debug output\n";
1391
1392 static char show_codec_usage[] = 
1393 "Usage: h.323 show codec\n"
1394 "       Shows all enabled codecs\n";
1395
1396 static char show_cycle_usage[] = 
1397 "Usage: h.323 gk cycle\n"
1398 "       Manually re-register with the Gatekeper\n";
1399
1400 static char show_hangup_usage[] = 
1401 "Usage: h.323 hangup <token>\n"
1402 "       Manually try to hang up call identified by <token>\n";
1403
1404 static char show_tokens_usage[] = 
1405 "Usage: h.323 show tokens\n"
1406 "       Print out all active call tokens\n";
1407
1408 static struct ast_cli_entry  cli_trace =
1409         { { "h.323", "trace", NULL }, h323_do_trace, "Enable H.323 Stack Tracing", trace_usage };
1410 static struct ast_cli_entry  cli_no_trace =
1411         { { "h.323", "no", "trace", NULL }, h323_no_trace, "Disable H.323 Stack Tracing", no_trace_usage };
1412 static struct ast_cli_entry  cli_debug =
1413         { { "h.323", "debug", NULL }, h323_do_debug, "Enable chan_h323 debug", debug_usage };
1414 static struct ast_cli_entry  cli_no_debug =
1415         { { "h.323", "no", "debug", NULL }, h323_no_debug, "Disable chan_h323 debug", no_debug_usage };
1416 static struct ast_cli_entry  cli_show_codecs =
1417         { { "h.323", "show", "codecs", NULL }, h323_show_codec, "Show enabled codecs", show_codec_usage };
1418 static struct ast_cli_entry  cli_gk_cycle =
1419         { { "h.323", "gk", "cycle", NULL }, h323_gk_cycle, "Manually re-register with the Gatekeper", show_cycle_usage };
1420 static struct ast_cli_entry  cli_hangup_call =
1421         { { "h.323", "hangup", NULL }, h323_ep_hangup, "Manually try to hang up a call", show_hangup_usage };
1422 static struct ast_cli_entry  cli_show_tokens =
1423         { { "h.323", "show", "tokens", NULL }, h323_tokens_show, "Manually try to hang up a call", show_tokens_usage };
1424
1425
1426
1427 int reload_config(void)
1428 {
1429         
1430         int format;
1431         struct ast_config *cfg;
1432         struct ast_variable *v;
1433         struct oh323_peer *peer   = NULL;
1434         struct oh323_user *user   = NULL;
1435         struct oh323_alias *alias = NULL;
1436         struct hostent *hp;
1437         char *cat;
1438     char *utype;
1439         
1440         cfg = ast_load(config);
1441
1442         /* We *must* have a config file otherwise stop immediately */
1443         if (!cfg) {
1444                 ast_log(LOG_NOTICE, "Unable to load config %s, H.323 disabled\n", config);
1445                 return 1;
1446         }
1447         
1448        /* fire up the H.323 Endpoint */       
1449         if (!h323_end_point_exist()) {
1450                h323_end_point_create();        
1451         }
1452         h323debug=0;
1453         dtmfmode = H323_DTMF_RFC2833;
1454
1455         memset(&bindaddr, 0, sizeof(bindaddr));
1456
1457         v = ast_variable_browse(cfg, "general");
1458         while(v) {
1459                 /* Create the interface list */
1460                 if (!strcasecmp(v->name, "port")) {
1461                         port = (int)strtol(v->value, NULL, 10);
1462                 } else if (!strcasecmp(v->name, "bindaddr")) {
1463                         if (!(hp = gethostbyname(v->value))) {
1464                                 ast_log(LOG_WARNING, "Invalid address: %s\n", v->value);
1465                         } else {
1466                                 memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
1467                         }
1468                 } else if (!strcasecmp(v->name, "allow")) {
1469                         format = ast_getformatbyname(v->value);
1470                         if (format < 1) 
1471                                 ast_log(LOG_WARNING, "Cannot allow unknown format '%s'\n", v->value);
1472                         else
1473                                 capability |= format;
1474                 } else if (!strcasecmp(v->name, "disallow")) {
1475                         format = ast_getformatbyname(v->value);
1476                         if (format < 1) 
1477                                 ast_log(LOG_WARNING, "Cannot disallow unknown format '%s'\n", v->value);
1478                         else
1479                                 capability &= ~format;
1480                 } else if (!strcasecmp(v->name, "tos")) {
1481                         if (sscanf(v->value, "%i", &format) == 1)
1482                                 tos = format & 0xff;
1483                         else if (!strcasecmp(v->value, "lowdelay"))
1484                                 tos = IPTOS_LOWDELAY;
1485                         else if (!strcasecmp(v->value, "throughput"))
1486                                 tos = IPTOS_THROUGHPUT;
1487                         else if (!strcasecmp(v->value, "reliability"))
1488                                 tos = IPTOS_RELIABILITY;
1489                         else if (!strcasecmp(v->value, "mincost"))
1490                                 tos = IPTOS_MINCOST;
1491                         else if (!strcasecmp(v->value, "none"))
1492                                 tos = 0;
1493                         else
1494                                 ast_log(LOG_WARNING, "Invalid tos value at line %d, should be 'lowdelay', 'throughput', 'reliability', 'mincost', or 'none'\n", v->lineno);
1495                 } else if (!strcasecmp(v->name, "gatekeeper")) {
1496                         if (!strcasecmp(v->value, "DISABLE")) {
1497                                 gatekeeper_disable = 1;
1498                                 usingGk = 0;
1499                         } else if (!strcasecmp(v->value, "DISCOVER")) {
1500                                 gatekeeper_disable = 0;
1501                                 gatekeeper_discover = 1;
1502                                 usingGk = 1;
1503                         } else {
1504                                 gatekeeper_disable = 0;
1505                                 usingGk = 1;
1506                                 strncpy(gatekeeper, v->value, sizeof(gatekeeper)-1);
1507                         }
1508                 } else if (!strcasecmp(v->name, "secret")) {
1509                                 strncpy(secret, v->value, sizeof(secret)-1);
1510                 } else if (!strcasecmp(v->name, "AllowGKRouted")) {
1511                                 gkroute = ast_true(v->value);
1512                 } else if (!strcasecmp(v->name, "context")) {
1513                         strncpy(default_context, v->value, sizeof(default_context)-1);
1514                         ast_verbose(VERBOSE_PREFIX_3 "  == Setting default context to %s\n", default_context);  
1515                 } else if (!strcasecmp(v->name, "dtmfmode")) {
1516                         if (!strcasecmp(v->value, "inband"))
1517                                 dtmfmode=H323_DTMF_INBAND;
1518                         else if (!strcasecmp(v->value, "rfc2833"))
1519                                 dtmfmode = H323_DTMF_RFC2833;
1520                         else {
1521                                 ast_log(LOG_WARNING, "Unknown dtmf mode '%s', using rfc2833\n", v->value);
1522                                 dtmfmode = H323_DTMF_RFC2833;
1523                         }
1524                 } else if (!strcasecmp(v->name, "UserByAlias")) {
1525                         userbyalias = ast_true(v->value);
1526                 } else if (!strcasecmp(v->name, "bridge")) {
1527                         bridge_default = ast_true(v->value);
1528                 }
1529                 v = v->next;    
1530         }
1531         
1532         cat = ast_category_browse(cfg, NULL);
1533         while(cat) {
1534                 if (strcasecmp(cat, "general")) {
1535                         utype = ast_variable_retrieve(cfg, cat, "type");
1536                         if (utype) {
1537                                 if (!strcasecmp(utype, "user") || !strcasecmp(utype, "friend")) {
1538                                         user = build_user(cat, ast_variable_browse(cfg, cat));
1539                                         if (user) {
1540                                                 ast_mutex_lock(&userl.lock);
1541                                                 user->next = userl.users;
1542                                                 userl.users = user;
1543                                                 ast_mutex_unlock(&userl.lock);
1544                                         }
1545                                 }  else if (!strcasecmp(utype, "peer") || !strcasecmp(utype, "friend")) {
1546                                         peer = build_peer(cat, ast_variable_browse(cfg, cat));
1547                                         if (peer) {
1548                                                 ast_mutex_lock(&peerl.lock);
1549                                                 peer->next = peerl.peers;
1550                                                 peerl.peers = peer;
1551                                                 ast_mutex_unlock(&peerl.lock);
1552                                         }
1553                                 }  else if (!strcasecmp(utype, "h323")) {                       
1554                                         alias = build_alias(cat, ast_variable_browse(cfg, cat));
1555                                         if (alias) {
1556                                                 ast_mutex_lock(&aliasl.lock);
1557                                                 alias->next = aliasl.aliases;
1558                                                 aliasl.aliases = alias;
1559                                                 ast_mutex_unlock(&aliasl.lock);
1560                                         }
1561                                 } else {
1562                                         ast_log(LOG_WARNING, "Unknown type '%s' for '%s' in %s\n", utype, cat, config);
1563                                 }
1564                         } else
1565                                 ast_log(LOG_WARNING, "Section '%s' lacks type\n", cat);
1566                 }
1567                 cat = ast_category_browse(cfg, cat);
1568         }
1569
1570         /* Register our H.323 aliases if any*/
1571         while (alias) {         
1572                 if (h323_set_alias(alias)) {
1573                         ast_log(LOG_ERROR, "Alias %s rejected by endpoint\n", alias->name);
1574                         return -1;
1575                 }       
1576                 alias = alias->next;
1577         }
1578
1579         /* Add some capabilities */
1580         if(h323_set_capability(capability, dtmfmode)) {
1581                 ast_log(LOG_ERROR, "Capabilities failure, this is bad.\n");
1582                 return -1;
1583         }       
1584         ast_destroy(cfg);
1585
1586         return 0;
1587 }
1588
1589 void delete_users(void)
1590 {
1591         struct oh323_user *user, *userlast;
1592         struct oh323_peer *peer;
1593         
1594         /* Delete all users */
1595         ast_mutex_lock(&userl.lock);
1596         for (user=userl.users;user;) {
1597                 userlast = user;
1598                 user=user->next;
1599                 free(userlast);
1600         }
1601         userl.users=NULL;
1602         ast_mutex_unlock(&userl.lock);
1603         ast_mutex_lock(&peerl.lock);
1604         for (peer=peerl.peers;peer;) {
1605                 /* Assume all will be deleted, and we'll find out for sure later */
1606                 peer->delme = 1;
1607                 peer = peer->next;
1608         }
1609         ast_mutex_unlock(&peerl.lock);
1610 }
1611
1612 void delete_aliases(void)
1613 {
1614         struct oh323_alias *alias, *aliaslast;
1615                 
1616         /* Delete all users */
1617         ast_mutex_lock(&aliasl.lock);
1618         for (alias=aliasl.aliases;alias;) {
1619                 aliaslast = alias;
1620                 alias=alias->next;
1621                 free(aliaslast);
1622         }
1623         aliasl.aliases=NULL;
1624         ast_mutex_unlock(&aliasl.lock);
1625 }
1626
1627 void prune_peers(void)
1628 {
1629         /* Prune peers who still are supposed to be deleted */
1630         struct oh323_peer *peer, *peerlast, *peernext;
1631         ast_mutex_lock(&peerl.lock);
1632         peerlast = NULL;
1633         for (peer=peerl.peers;peer;) {
1634                 peernext = peer->next;
1635                 if (peer->delme) {
1636                         free(peer);
1637                         if (peerlast)
1638                                 peerlast->next = peernext;
1639                         else
1640                                 peerl.peers = peernext;
1641                 } else
1642                         peerlast = peer;
1643                 peer=peernext;
1644         }
1645         ast_mutex_unlock(&peerl.lock);
1646 }
1647
1648 int reload(void)
1649 {
1650         delete_users();
1651         delete_aliases();
1652         prune_peers();
1653
1654 #if 0
1655         if (strlen(gatekeeper)) {
1656                 h323_gk_urq();
1657         }
1658 #endif
1659
1660         reload_config();
1661
1662 #if 0
1663         /* Possibly register with a GK */
1664         if (gatekeeper_disable == 0) {
1665                 if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
1666                         ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
1667                         h323_end_process();
1668                         return -1;
1669                 }
1670         }
1671 #endif
1672         restart_monitor();
1673         return 0;
1674 }
1675
1676
1677 static struct ast_rtp *oh323_get_rtp_peer(struct ast_channel *chan)
1678 {
1679         struct oh323_pvt *p;
1680         p = chan->pvt->pvt;
1681         if (p && p->rtp && p->bridge) {
1682                 return p->rtp;
1683         }
1684         return NULL;
1685 }
1686
1687 static struct ast_rtp *oh323_get_vrtp_peer(struct ast_channel *chan)
1688 {
1689         return NULL;
1690 }
1691
1692 static char *convertcap(int cap)
1693 {
1694         switch (cap) {
1695         case AST_FORMAT_G723_1:
1696                 return "G.723";
1697         case AST_FORMAT_GSM:
1698                 return "GSM";
1699         case AST_FORMAT_ULAW:
1700                 return "ULAW";
1701         case AST_FORMAT_ALAW:
1702                 return "ALAW";
1703         case AST_FORMAT_ADPCM:
1704                 return "G.728";
1705         case AST_FORMAT_G729A:
1706                 return "G.729";
1707         case AST_FORMAT_SPEEX:
1708                 return "SPEEX";
1709         case AST_FORMAT_ILBC:
1710                 return "ILBC";
1711         default:
1712                 ast_log(LOG_NOTICE, "Don't know how to deal with mode %d\n", cap);
1713                 return NULL;
1714         }
1715
1716 }
1717
1718 static int oh323_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp)
1719 {
1720         /* XXX Deal with Video */
1721         struct oh323_pvt *p;
1722         struct sockaddr_in them;
1723         struct sockaddr_in us;
1724         char *mode;
1725
1726         mode = convertcap(chan->writeformat); 
1727
1728         if (!rtp) {
1729                 return 0;
1730         }
1731
1732         p = chan->pvt->pvt;
1733         if (!p) {
1734                 ast_log(LOG_ERROR, "No Private Structure, this is bad\n");
1735                 return -1;
1736         }
1737
1738         ast_rtp_get_peer(rtp, &them);   
1739         ast_rtp_get_us(rtp, &us);
1740
1741
1742         h323_native_bridge(p->cd.call_token, inet_ntoa(them.sin_addr), mode);
1743         
1744         return 0;
1745         
1746 }
1747
1748 static struct ast_rtp_protocol oh323_rtp = {
1749         get_rtp_info: oh323_get_rtp_peer,
1750         get_vrtp_info: oh323_get_vrtp_peer,
1751         set_rtp_peer: oh323_set_rtp_peer,
1752 };
1753
1754
1755 int load_module()
1756 {
1757         int res;
1758
1759         res = reload_config();
1760
1761         if (res) {
1762                 return 0;
1763         } else {
1764                 /* Make sure we can register our channel type */
1765                 if (ast_channel_register(type, tdesc, capability, oh323_request)) {
1766                         ast_log(LOG_ERROR, "Unable to register channel class %s\n", type);
1767                         h323_end_process();
1768                         return -1;
1769                 }
1770                 ast_cli_register(&cli_debug);
1771                 ast_cli_register(&cli_no_debug);
1772                 ast_cli_register(&cli_trace);
1773                 ast_cli_register(&cli_no_trace);
1774                 ast_cli_register(&cli_show_codecs);
1775                 ast_cli_register(&cli_gk_cycle);
1776                 ast_cli_register(&cli_hangup_call);
1777                 ast_cli_register(&cli_show_tokens);
1778
1779                 oh323_rtp.type = type;
1780                 ast_rtp_proto_register(&oh323_rtp);
1781
1782                 sched = sched_context_create();
1783                 if (!sched) {
1784                         ast_log(LOG_WARNING, "Unable to create schedule context\n");
1785                 }
1786                 io = io_context_create();
1787                 if (!io) {
1788                         ast_log(LOG_WARNING, "Unable to create I/O context\n");
1789                 }
1790                 
1791                 /* Register our callback functions */
1792                 h323_callback_register(setup_incoming_call, 
1793                                        setup_outgoing_call,                                                      
1794                                        create_connection, 
1795                                        setup_rtp_connection, 
1796                                        cleanup_connection, 
1797                                        connection_made, 
1798                                        send_digit);     
1799         
1800
1801                 /* start the h.323 listener */
1802                 if (h323_start_listener(port, bindaddr)) {
1803                         ast_log(LOG_ERROR, "Unable to create H323 listener.\n");
1804 //                      h323_end_process();
1805                         return -1;
1806                 }
1807
1808                 /* Possibly register with a GK */
1809                 if (gatekeeper_disable == 0) {
1810                         if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
1811                                 ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
1812 //                              h323_end_process();
1813                                 return 0;
1814                         }
1815                 }
1816                 /* And start the monitor for the first time */
1817                 restart_monitor();
1818         }
1819         return res;
1820 }
1821
1822
1823 int unload_module() 
1824 {
1825         struct oh323_pvt *p, *pl;
1826                 
1827         if (!ast_mutex_lock(&iflock)) {
1828         /* hangup all interfaces if they have an owner */
1829         p = iflist;
1830         while(p) {
1831                 if (p->owner)
1832                         ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
1833                 p = p->next;
1834         }
1835         iflist = NULL;
1836         ast_mutex_unlock(&iflock);
1837         } else {
1838                 ast_log(LOG_WARNING, "Unable to lock the interface list\n");
1839                 return -1;
1840         }
1841
1842         if (!ast_mutex_lock(&monlock)) {
1843                 if (monitor_thread && (monitor_thread != AST_PTHREADT_STOP)) {
1844                         pthread_cancel(monitor_thread);
1845                         pthread_kill(monitor_thread, SIGURG);
1846                         pthread_join(monitor_thread, NULL);
1847                  }
1848                 monitor_thread = AST_PTHREADT_STOP;
1849                 ast_mutex_unlock(&monlock);
1850         } else {
1851                 ast_log(LOG_WARNING, "Unable to lock the monitor\n");
1852                 return -1;
1853         }
1854                 
1855         if (!ast_mutex_lock(&iflock)) {
1856                 /* destroy all the interfaces and free their memory */
1857                 p = iflist;
1858                 while(p) {
1859                         pl = p;
1860                         p = p->next;
1861                         /* free associated memory */
1862                         free(pl);
1863                 }
1864                 iflist = NULL;
1865                 ast_mutex_unlock(&iflock);
1866         } else {
1867                 ast_log(LOG_WARNING, "Unable to lock the interface list\n");
1868                 return -1;
1869         }
1870         h323_gk_urq();
1871         h323_end_process();
1872
1873         /* unregister rtp */
1874         ast_rtp_proto_unregister(&oh323_rtp);
1875         
1876         /* unregister commands */
1877         ast_cli_unregister(&cli_debug);
1878         ast_cli_unregister(&cli_no_debug);
1879         ast_cli_unregister(&cli_trace);
1880         ast_cli_unregister(&cli_no_trace);   
1881         ast_cli_unregister(&cli_show_codecs);
1882         ast_cli_unregister(&cli_gk_cycle);
1883         ast_cli_unregister(&cli_hangup_call);
1884         ast_cli_unregister(&cli_show_tokens);
1885                         
1886         /* unregister channel type */
1887         ast_channel_unregister(type);
1888
1889         return 0; 
1890
1891
1892 int usecount()
1893 {
1894         int res;
1895         ast_mutex_lock(&usecnt_lock);
1896         res = usecnt;
1897         ast_mutex_unlock(&usecnt_lock);
1898         return res;
1899 }
1900
1901 char *description()
1902 {
1903         return desc;
1904 }
1905
1906 char *key()
1907 {
1908         return ASTERISK_GPL_KEY;
1909 }
1910
1911
1912
1913