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