do user authentication right
[asterisk/asterisk.git] / channels / h323 / chan_h323.c
1 /*
2  * chan_oh323.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  */
27
28
29 #include <stdio.h>
30 #include <pthread.h>
31 #include <string.h>
32 #include <asterisk/lock.h>
33 #include <asterisk/logger.h>
34 #include <asterisk/channel.h>
35 #include <asterisk/channel_pvt.h>
36 #include <asterisk/config.h>
37 #include <asterisk/module.h>
38 #include <asterisk/pbx.h>
39 #include <asterisk/options.h>
40 #include <asterisk/lock.h>
41 #include <asterisk/sched.h>
42 #include <asterisk/io.h>
43 #include <asterisk/rtp.h>
44 #include <asterisk/acl.h>
45 #include <asterisk/callerid.h>
46 #include <asterisk/cli.h>
47 #include <asterisk/dsp.h>
48 #include <sys/socket.h>
49 #include <net/if.h>
50 #include <errno.h>
51 #include <unistd.h>
52 #include <stdlib.h>
53 #include <fcntl.h>
54 #include <netdb.h>
55 #include <sys/signal.h>
56 #include <netinet/ip.h>
57
58
59 #include "chan_h323.h"
60
61 /** String variables required by ASTERISK */
62 static char *type       = "H323";
63 static char *desc       = "The NuFone Network's Open H.323 Channel Driver";
64 static char *tdesc      = "The NuFone Network's Open H.323 Channel Driver";
65 static char *config = "h323.conf";
66
67 static char default_context[AST_MAX_EXTENSION];
68
69 /** H.323 configuration values */
70 static char gatekeeper[100];
71 static int      gatekeeper_disable = 1;
72 static int      gatekeeper_discover = 0;
73 static int  manual = 0;
74 static int  usingGk;
75 static int      port = 1720;
76 static int      jitter;
77 static int  gkroute = 0;
78
79 /* Just about everybody seems to support ulaw, so make it a nice default */
80 static int capability = AST_FORMAT_ULAW;
81
82 /* TOS flag */
83 static int tos = 0;
84
85 static int dtmfmode = H323_DTMF_RFC2833;
86
87 static char secret[50];
88
89 /** Private structure of a OpenH323 channel */
90 struct oh323_pvt {
91         pthread_mutex_t lock;                                   /* Channel private lock */
92         call_options_t call_opt;                                /* Options to be used during call setup */
93         int     alreadygone;                                            /* Whether or not we've already been destroyed by or peer */
94         int needdestroy;                                                /* if we need to be destroyed */
95         call_details_t cd;                                              /* Call details */
96         struct ast_channel *owner;                              /* Who owns us */
97         int capability;                                                 /* Special capability */
98         int nonCodecCapability;
99         int outgoing;                                                   /* Outgoing or incoming call? */
100         int nat;                                                                /* Are we talking to a NAT EP?*/
101         int bridge;                                                             /* Determine of we should native bridge or not*/
102         char exten[AST_MAX_EXTENSION];                  /* Requested extension */
103         char context[AST_MAX_EXTENSION];                /* Context where to start */
104         char username[81];                                              /* H.323 alias using this channel */
105         char accountcode[256];                                  /* Account code */
106         int amaflags;                                                   /* AMA Flags */
107         char callerid[80];                                              /* Caller*ID if available */
108         struct ast_rtp *rtp;                                    /* RTP Session */
109         int dtmfmode;
110         struct ast_dsp *vad;                                    /* Used for in-band DTMF detection */
111         struct oh323_pvt *next;                                 /* Next channel in list */
112 } *iflist = NULL;
113
114 static struct ast_user_list {
115         struct oh323_user *users;
116         pthread_mutex_t lock;
117 } userl = { NULL, AST_MUTEX_INITIALIZER };
118
119 static struct ast_peer_list {
120         struct oh323_peer *peers;
121         pthread_mutex_t lock;
122 } peerl = { NULL, AST_MUTEX_INITIALIZER };
123
124 static struct ast_alias_list {
125         struct oh323_alias *aliases;
126         pthread_mutex_t lock;
127 } aliasl = { NULL, AST_MUTEX_INITIALIZER };
128
129 /** Asterisk RTP stuff*/
130 static struct sched_context *sched;
131 static struct io_context *io;
132
133 /** Protect the interface list (of oh323_pvt's) */
134 static pthread_mutex_t iflock = AST_MUTEX_INITIALIZER;
135
136 /** Usage counter and associated lock */
137 static int usecnt =0;
138 static pthread_mutex_t usecnt_lock = AST_MUTEX_INITIALIZER;
139
140 /* Protect the monitoring thread, so only one process can kill or start it, and not
141    when it's doing something critical. */
142 static pthread_mutex_t monlock = AST_MUTEX_INITIALIZER;
143
144 /* This is the thread for the monitor which checks for input on the channels
145    which are not currently in use.  */
146 static pthread_t monitor_thread = 0;
147
148 static int restart_monitor(void);
149
150 static void __oh323_destroy(struct oh323_pvt *p)
151 {
152         struct oh323_pvt *cur, *prev = NULL;
153         
154         if (p->rtp) {
155                 ast_rtp_destroy(p->rtp);
156         }
157         
158         /* Unlink us from the owner if we have one */
159         if (p->owner) {
160                 ast_pthread_mutex_lock(&p->owner->lock);
161                 ast_log(LOG_DEBUG, "Detaching from %s\n", p->owner->name);
162                 p->owner->pvt->pvt = NULL;
163                 ast_pthread_mutex_unlock(&p->owner->lock);
164         }
165         cur = iflist;
166         while(cur) {
167                 if (cur == p) {
168                         if (prev)
169                                 prev->next = cur->next;
170                         else
171                                 iflist = cur->next;
172                         break;
173                 }
174                 prev = cur;
175                 cur = cur->next;
176         }
177         if (!cur) {
178                 ast_log(LOG_WARNING, "%p is not in list?!?! \n", cur);
179         } else
180                 free(p);
181 }
182
183 static void oh323_destroy(struct oh323_pvt *p)
184 {
185         ast_pthread_mutex_lock(&iflock);
186         __oh323_destroy(p);
187         ast_pthread_mutex_unlock(&iflock);
188 }
189
190 static struct oh323_alias *build_alias(char *name, struct ast_variable *v)
191 {
192         struct oh323_alias *alias;
193
194         alias = (struct oh323_alias *)malloc(sizeof(struct oh323_alias));
195
196         if (alias) {
197                 memset(alias, 0, sizeof(struct oh323_alias));
198                 strncpy(alias->name, name, sizeof(alias->name)-1);
199
200                 while (v) {
201                         if (!strcasecmp(v->name, "e164")) {
202                                 strncpy(alias->e164,  v->value, sizeof(alias->e164)-1);
203                         } else if (!strcasecmp(v->name, "prefix")) {
204                                 strncpy(alias->prefix,  v->value, sizeof(alias->prefix)-1);
205                         } else if (!strcasecmp(v->name, "context")) {
206                                 strncpy(alias->context,  v->value, sizeof(alias->context)-1);
207                         } else if (!strcasecmp(v->name, "secret")) {
208                                 strncpy(alias->prefix,  v->value, sizeof(alias->secret)-1);
209                         }
210                         v = v->next;
211                 }
212         }
213         return alias;
214 }
215
216 static struct oh323_user *build_user(char *name, struct ast_variable *v)
217 {
218         struct oh323_user *user;
219         int format;
220         
221         user = (struct oh323_user *)malloc(sizeof(struct oh323_user));
222         if (user) {
223                 memset(user, 0, sizeof(struct oh323_user));
224                 strncpy(user->name, name, sizeof(user->name)-1);
225                 
226                 /* set the usage flag to a sane starting value*/
227                 user->inUse = 0;
228                 /* Assume we can native bridge */
229                 user->bridge = 1; 
230
231                 while(v) {
232                         if (!strcasecmp(v->name, "context")) {
233                                 strncpy(user->context, v->value, sizeof(user->context)-1);
234                         } else if (!strcasecmp(v->name, "bridge")) {
235                                 user->bridge = ast_true(v->value);
236                         } else if (!strcasecmp(v->name, "noFastStart")) {
237                                 user->noFastStart = ast_true(v->value);
238                         } else if (!strcasecmp(v->name, "noH245Tunneling")) {
239                                 user->noH245Tunneling = ast_true(v->value);
240                         } else if (!strcasecmp(v->name, "noSilenceSuppression")) {
241                                 user->noSilenceSuppression = ast_true(v->value);
242                         } else if (!strcasecmp(v->name, "secret")) {
243                                 strncpy(user->secret, v->value, sizeof(user->secret)-1);
244                         } else if (!strcasecmp(v->name, "accountcode")) {
245                                 strncpy(user->accountcode, v->value, sizeof(user->accountcode)-1);
246                         } else if (!strcasecmp(v->name, "incominglimit")) {
247                                 user->incominglimit = atoi(v->value);
248                                 if (user->incominglimit < 0)
249                                         user->incominglimit = 0;
250                         } else if (!strcasecmp(v->name, "host")) {
251                                 if (!strcasecmp(v->value, "dynamic")) {
252                                         ast_log(LOG_ERROR, "Dynamic host configuration not implemented, yet!\n");
253                                         free(user);
254                                         return NULL;
255                                 } else if (ast_get_ip(&user->addr, v->value)) {
256                                         free(user);
257                                         return NULL;
258                                 } 
259                                 /* Let us know we need to use ip authentication */
260                                 user->host = 1;
261                         } else if (!strcasecmp(v->name, "amaflags")) {
262                                 format = ast_cdr_amaflags2int(v->value);
263                                 if (format < 0) {
264                                         ast_log(LOG_WARNING, "Invalid AMA Flags: %s at line %d\n", v->value, v->lineno);
265                                 } else {
266                                         user->amaflags = format;
267                                 }
268                         }
269                         v = v->next;
270                 }
271         }
272         return user;
273 }
274
275
276 static struct oh323_peer *build_peer(char *name, struct ast_variable *v)
277 {
278         struct oh323_peer *peer;
279         struct oh323_peer *prev;
280         int found=0;
281         
282         prev = NULL;
283         ast_pthread_mutex_lock(&peerl.lock);
284         peer = peerl.peers;
285
286         while(peer) {
287                 if (!strcasecmp(peer->name, name)) {    
288                         break;
289                 }
290                 prev = peer;
291                 peer = peer->next;
292         }
293
294         if (peer) {
295                 found++;
296                 /* Already in the list, remove it and it will be added back (or FREE'd) */
297                 if (prev) {
298                         prev->next = peer->next;
299                 } else {
300                         peerl.peers = peer->next;
301                 }
302                 ast_pthread_mutex_unlock(&peerl.lock);
303         } else {
304                 ast_pthread_mutex_unlock(&peerl.lock);
305                 peer = malloc(sizeof(struct oh323_peer));
306                 memset(peer, 0, sizeof(struct oh323_peer));
307         }
308         if (peer) {
309                 if (!found) {
310                         strncpy(peer->name, name, sizeof(peer->name)-1);
311                 }
312                 
313                 /* set the usage flag to a sane starting value*/
314                 peer->inUse = 0;
315
316                 while(v) {
317                         if (!strcasecmp(v->name, "context")) {
318                                 strncpy(peer->context, v->value, sizeof(peer->context)-1);
319                         }  else if (!strcasecmp(v->name, "bridge")) {
320                                 peer->bridge = ast_true(v->value);
321                         } else if (!strcasecmp(v->name, "noFastStart")) {
322                                 peer->noFastStart = ast_true(v->value);
323                         } else if (!strcasecmp(v->name, "noH245Tunneling")) {
324                                 peer->noH245Tunneling = ast_true(v->value);
325                         } else if (!strcasecmp(v->name, "noSilenceSuppression")) {
326                                 peer->noSilenceSuppression = ast_true(v->value);
327                         } else if (!strcasecmp(v->name, "outgoinglimit")) {
328                                 peer->outgoinglimit = atoi(v->value);
329                                 if (peer->outgoinglimit > 0)
330                                         peer->outgoinglimit = 0;
331                         } else if (!strcasecmp(v->name, "host")) {
332                                 if (!strcasecmp(v->value, "dynamic")) {
333                                         ast_log(LOG_ERROR, "Dynamic host configuration not implemented, yet!\n");
334                                         free(peer);
335                                         return NULL;
336                                 }
337                                 if (ast_get_ip(&peer->addr, v->value)) {
338                                                 free(peer);
339                                                 return NULL;
340                                 }
341                         } 
342                         v=v->next;
343                 }
344         }
345         return peer;
346 }
347
348
349
350 /**
351  * Send (play) the specified digit to the channel.
352  * 
353  */
354 static int oh323_digit(struct ast_channel *c, char digit)
355 {
356         struct oh323_pvt *p = c->pvt->pvt;
357         if (p && p->rtp && (p->dtmfmode & H323_DTMF_RFC2833)) {
358                 ast_rtp_senddigit(p->rtp, digit);
359         }
360         /* If in-band DTMF is desired, send that */
361         if (p->dtmfmode & H323_DTMF_INBAND)
362                 h323_send_tone(p->cd.call_token, digit);
363         return 0;
364 }
365
366
367 /**
368  * Make a call over the specified channel to the specified 
369  * destination. This function will parse the destination string
370  * and determine the address-number to call.
371  * Return -1 on error, 0 on success.
372  */
373 static int oh323_call(struct ast_channel *c, char *dest, int timeout)
374 {
375         int res;
376         struct oh323_pvt *p = c->pvt->pvt;
377         char called_addr[256];
378
379
380         ast_log(LOG_DEBUG, "dest=%s, timeout=%d.\n", dest, timeout);
381
382         if ((c->_state != AST_STATE_DOWN) && (c->_state != AST_STATE_RESERVED)) {
383                 ast_log(LOG_WARNING, "Line is already in use (%s)\n", c->name);
384                 return -1;
385         }
386
387         /* set the connect port */
388         p->call_opt.port = port;
389         
390         /* outgoing call */
391         p->outgoing = 1;
392
393         /* Clear the call token */
394         if ((p->cd).call_token == NULL)
395                 (p->cd).call_token = (char *)malloc(128);
396
397         memset((char *)(p->cd).call_token, 0, 128);
398         
399         if (p->cd.call_token == NULL) {
400                 ast_log(LOG_ERROR, "Not enough memory.\n");
401                 return -1;
402         }
403
404         /* Build the address to call */
405         memset(called_addr, 0, sizeof(dest));
406         memcpy(called_addr, dest, sizeof(called_addr));
407
408         res = h323_make_call(called_addr, &(p->cd), p->call_opt);
409
410         if (res) {
411                 printf("h323_make_call failed\n");
412                 return -1;
413         }
414
415         ast_setstate(c, AST_STATE_RINGING);
416         return 0;
417 }
418
419
420 static int oh323_answer(struct ast_channel *c)
421 {
422         int res;
423
424         struct oh323_pvt *p = c->pvt->pvt;
425
426         res = h323_answering_call(p->cd.call_token, 0);
427         
428         if (c->_state != AST_STATE_UP)
429                 ast_setstate(c, AST_STATE_UP);
430
431         return res;
432 }
433
434 static int oh323_hangup(struct ast_channel *c)
435 {
436         struct oh323_pvt *p = c->pvt->pvt;
437         int needcancel = 0;
438         if (h323debug)
439                 ast_log(LOG_DEBUG, "oh323_hangup(%s)\n", c->name);
440         if (!c->pvt->pvt) {
441                 ast_log(LOG_DEBUG, "Asked to hangup channel not connected\n");
442                 return 0;
443         }
444         ast_pthread_mutex_lock(&p->lock);
445         /* Determine how to disconnect */
446         if (p->owner != c) {
447                 ast_log(LOG_WARNING, "Huh?  We aren't the owner?\n");
448                 ast_pthread_mutex_unlock(&p->lock);
449                 return 0;
450         }
451         if (!c || (c->_state != AST_STATE_UP))
452                 needcancel = 1;
453         /* Disconnect */
454         p = c->pvt->pvt;
455         
456         /* Free dsp used for in-band DTMF detection */
457         if (p->vad) {
458                 ast_dsp_free(p->vad);
459      }
460
461         p->owner = NULL;
462         c->pvt->pvt = NULL;
463
464         /* Start the process if it's not already started */
465         if (!p->alreadygone) {
466                 if (h323_clear_call((p->cd).call_token)) 
467                         ast_log(LOG_DEBUG, "ClearCall failed.\n");
468                 p->needdestroy = 1;
469         }
470
471         
472         ast_pthread_mutex_unlock(&p->lock);
473         return 0;
474 }
475
476 static struct ast_frame *oh323_rtp_read(struct oh323_pvt *p)
477 {
478         /* Retrieve audio/etc from channel.  Assumes p->lock is already held. */
479         struct ast_frame *f;
480         static struct ast_frame null_frame = { AST_FRAME_NULL, };
481         f = ast_rtp_read(p->rtp);
482         /* Don't send RFC2833 if we're not supposed to */
483         if (f && (f->frametype == AST_FRAME_DTMF) && !(p->dtmfmode & H323_DTMF_RFC2833))
484                 return &null_frame;
485         if (p->owner) {
486                 /* We already hold the channel lock */
487                 if (f->frametype == AST_FRAME_VOICE) {
488                         if (f->subclass != p->owner->nativeformats) {
489                                 ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
490                                 p->owner->nativeformats = f->subclass;
491                                 ast_set_read_format(p->owner, p->owner->readformat);
492                                 ast_set_write_format(p->owner, p->owner->writeformat);
493                         }
494                 
495                         /* Do in-band DTMF detection */
496                         if (p->dtmfmode & H323_DTMF_INBAND) {
497                    f = ast_dsp_process(p->owner,p->vad,f,0);
498                                    if (f->frametype == AST_FRAME_DTMF)
499                                         ast_log(LOG_DEBUG, "Got in-band digit %c.\n", f->subclass);
500             }
501                         
502                         
503                 }
504         }
505         return f;
506 }
507
508
509 static struct ast_frame  *oh323_read(struct ast_channel *c)
510 {
511         struct ast_frame *fr;
512         struct oh323_pvt *p = c->pvt->pvt;
513         ast_pthread_mutex_lock(&p->lock);
514         fr = oh323_rtp_read(p);
515         ast_pthread_mutex_unlock(&p->lock);
516         return fr;
517 }
518
519 static int oh323_write(struct ast_channel *c, struct ast_frame *frame)
520 {
521         struct oh323_pvt *p = c->pvt->pvt;
522         int res = 0;
523         if (frame->frametype != AST_FRAME_VOICE) {
524                 if (frame->frametype == AST_FRAME_IMAGE)
525                         return 0;
526                 else {
527                         ast_log(LOG_WARNING, "Can't send %d type frames with H323 write\n", frame->frametype);
528                         return 0;
529                 }
530         } else {
531                 if (!(frame->subclass & c->nativeformats)) {
532                         ast_log(LOG_WARNING, "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
533                                 frame->subclass, c->nativeformats, c->readformat, c->writeformat);
534                         return -1;
535                 }
536         }
537         if (p) {
538                 ast_pthread_mutex_lock(&p->lock);
539                 if (p->rtp) {
540                         res =  ast_rtp_write(p->rtp, frame);
541                 }
542                 ast_pthread_mutex_unlock(&p->lock);
543         }
544         return res;
545 }
546
547 /** FIXME: Can I acutally use this or does Open H.323 take care of everything? */
548 static int oh323_indicate(struct ast_channel *c, int condition)
549 {
550
551         struct oh323_pvt *p = c->pvt->pvt;
552         
553         switch(condition) {
554         case AST_CONTROL_RINGING:
555                 if (c->_state == AST_STATE_RING) {
556                 //      transmit_response(p, "180 Ringing", &p->initreq);
557                         break;
558                 }
559                 return -1;
560         case AST_CONTROL_BUSY:
561                 if (c->_state != AST_STATE_UP) {
562                 //      transmit_response(p, "600 Busy everywhere", &p->initreq);
563                         p->alreadygone = 1;
564                         ast_softhangup(c, AST_SOFTHANGUP_DEV);
565                         break;
566                 }
567                 return -1;
568         case AST_CONTROL_CONGESTION:
569                 if (c->_state != AST_STATE_UP) {
570                 //      transmit_response(p, "486 Busy here", &p->initreq);
571                         p->alreadygone = 1;
572                         ast_softhangup(c, AST_SOFTHANGUP_DEV);
573                         break;
574                 }
575                 return -1;
576         case -1:
577                 return -1;
578         default:
579                 ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", condition);
580                 return -1;
581         }
582         return 0;
583 }
584
585 // FIXME: WTF is this? Do I need this???
586 static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
587 {
588         struct oh323_pvt *p = newchan->pvt->pvt;
589
590         ast_pthread_mutex_lock(&p->lock);
591         if (p->owner != oldchan) {
592                 ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, p->owner);
593                 return -1;
594         }
595         p->owner = newchan;
596         ast_pthread_mutex_unlock(&p->lock);
597         return 0;
598 }
599
600 static struct ast_channel *oh323_new(struct oh323_pvt *i, int state, const char *host)
601 {
602         struct ast_channel *tmp;
603         int fmt;
604         tmp = ast_channel_alloc(1);
605         
606         if (tmp) {
607                 
608                 snprintf(tmp->name, sizeof(tmp->name)-1, "H323/%s", host);
609                 tmp->nativeformats = i->capability;
610                 if (!tmp->nativeformats)
611                         tmp->nativeformats = capability;
612                 fmt = ast_best_codec(tmp->nativeformats);
613                 tmp->type = type;
614                 tmp->fds[0] = ast_rtp_fd(i->rtp);
615                 ast_setstate(tmp, state);
616                 
617                 if (state == AST_STATE_RING)
618                         tmp->rings = 1;
619                 
620                 tmp->writeformat = fmt;
621                 tmp->pvt->rawwriteformat = fmt;
622                 tmp->readformat = fmt;
623                 tmp->pvt->rawreadformat = fmt;
624                 
625                 /* Allocate dsp for in-band DTMF support */
626                 if (i->dtmfmode & H323_DTMF_INBAND) {
627                         i->vad = ast_dsp_new();
628                         ast_dsp_set_features(i->vad, DSP_FEATURE_DTMF_DETECT);
629         }
630
631                 /* Register the OpenH323 channel's functions. */
632                 tmp->pvt->pvt = i;
633                 tmp->pvt->send_digit = oh323_digit;
634                 tmp->pvt->call = oh323_call;
635                 tmp->pvt->hangup = oh323_hangup;
636                 tmp->pvt->answer = oh323_answer;
637                 tmp->pvt->read = oh323_read;
638                 tmp->pvt->write = oh323_write;
639                 tmp->pvt->indicate = oh323_indicate;
640                 tmp->pvt->fixup = oh323_fixup;
641 //              tmp->pvt->bridge = ast_rtp_bridge;
642
643                 /*  Set the owner of this channel */
644                 i->owner = tmp;
645                 
646                 ast_pthread_mutex_lock(&usecnt_lock);
647                 usecnt++;
648                 ast_pthread_mutex_unlock(&usecnt_lock);
649                 ast_update_use_count();
650                 strncpy(tmp->context, i->context, sizeof(tmp->context)-1);
651                 strncpy(tmp->exten, i->exten, sizeof(tmp->exten)-1);            
652                 tmp->priority = 1;
653                 if (strlen(i->callerid))
654                         tmp->callerid = strdup(i->callerid);
655                 if (state != AST_STATE_DOWN) {
656                         if (ast_pbx_start(tmp)) {
657                                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
658                                 ast_hangup(tmp);
659                                 tmp = NULL;
660                         }
661                 }
662         } else
663                 ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
664         return tmp;
665 }
666
667 static struct oh323_pvt *oh323_alloc(int callid)
668 {
669         struct oh323_pvt *p;
670
671         p = malloc(sizeof(struct oh323_pvt));
672         if (!p) {
673                 ast_log(LOG_ERROR, "Couldn't allocate private structure. This is bad\n");
674                 return NULL;
675         }
676
677         /* Keep track of stuff */
678         memset(p, 0, sizeof(struct oh323_pvt));
679         p->rtp = ast_rtp_new(NULL, NULL);
680         if (!p->rtp) {
681                 ast_log(LOG_WARNING, "Unable to create RTP session: %s\n", strerror(errno));
682                 free(p);
683                 return NULL;
684         }
685         ast_rtp_settos(p->rtp, tos);
686         ast_pthread_mutex_init(&p->lock);
687         
688         p->cd.call_reference = callid;
689         p->bridge = 1;
690         
691         p->dtmfmode = dtmfmode;
692         if (p->dtmfmode & H323_DTMF_RFC2833)
693                 p->nonCodecCapability |= AST_RTP_DTMF;
694
695         /* Add to interface list */
696         ast_pthread_mutex_lock(&iflock);
697         p->next = iflist;
698         iflist = p;
699         ast_pthread_mutex_unlock(&iflock);
700         return p;
701 }
702
703 static struct oh323_pvt *find_call(int call_reference)
704 {  
705         struct oh323_pvt *p;
706
707                 ast_pthread_mutex_lock(&iflock);
708         p = iflist; 
709
710         while(p) {
711                 if (p->cd.call_reference == call_reference) {
712                         /* Found the call */                                            
713                                                 ast_pthread_mutex_unlock(&iflock);
714                                                 return p;
715                 }
716                 p = p->next; 
717         }
718         ast_pthread_mutex_unlock(&iflock);
719                 return NULL;
720         
721 }
722
723 static struct ast_channel *oh323_request(char *type, int format, void *data)
724 {
725
726         int oldformat;
727         struct oh323_pvt *p;
728         struct ast_channel *tmpc = NULL;
729         char *dest = data;
730         char *ext, *host;
731         char tmp[256];
732
733         ast_log(LOG_DEBUG, "type=%s, format=%d, data=%s.\n", type, format, (char *)data);
734
735         oldformat = format;
736         format &= capability;
737         if (!format) {
738                 ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", format);
739                 return NULL;
740         }
741         
742         strncpy(tmp, dest, sizeof(tmp) - 1);
743         host = strchr(tmp, '@');
744         if (host) {
745                 *host = '\0';
746                 host++;
747                 ext = tmp;
748         } else {
749                 host = tmp;
750                 ext = NULL;
751         }
752         
753         p = oh323_alloc(0);
754
755         if (!p) {
756                 ast_log(LOG_WARNING, "Unable to build pvt data for '%s'\n", (char *)data);
757                 return NULL;
758         }
759
760         /* Assign a default capability */
761         p->capability = capability;
762
763         if (p->dtmfmode) {
764                 if (p->dtmfmode & H323_DTMF_RFC2833)
765                         p->nonCodecCapability |= AST_RTP_DTMF;
766                 else
767                         p->nonCodecCapability &= ~AST_RTP_DTMF;
768         }
769
770
771         ast_log(LOG_DEBUG, "Host: %s\tUsername: %s\n", host, p->username);
772
773         if (ext)
774                 strncpy(p->username, ext, sizeof(p->username) - 1);
775         tmpc = oh323_new(p, AST_STATE_DOWN, host);
776         if (!tmpc)
777                 oh323_destroy(p);
778         
779         restart_monitor();
780         
781         return tmpc;
782 }
783
784 struct oh323_alias *find_alias(const char *source_aliases)
785 {
786         struct oh323_alias *a;
787
788         a = aliasl.aliases;
789
790         while(a) {
791
792                 if (!strcasecmp(a->name, source_aliases)) {
793                         break;
794                 }
795                 a = a->next;
796         }
797         return a;
798 }
799
800 struct oh323_user *find_user(const char *source_aliases)
801 {
802         struct oh323_user *u;
803
804         u = userl.users;
805
806         while(u) {
807
808                 if (!strcasecmp(u->name, source_aliases)) {
809                         break;
810                 }
811                 u = u->next;
812         }
813         return u;
814
815 }
816
817 struct oh323_peer *find_peer(char *dest_peer)
818 {
819         struct oh323_peer *p;
820
821         p = peerl.peers;
822
823         while(p) {
824                 if (!strcasecmp(p->name, dest_peer)) {
825                         break;
826                 }
827                 p = p->next;
828         }
829         return p;
830
831 }
832
833 /**
834   * Callback for sending digits from H.323 up to asterisk
835   *
836   */
837 int send_digit(unsigned call_reference, char digit)
838 {
839         struct oh323_pvt *p;
840         struct ast_frame f;
841
842         ast_log(LOG_DEBUG, "Recieved Digit: %c\n", digit);
843         p = find_call(call_reference);
844         
845         if (!p) {
846                 ast_log(LOG_ERROR, "Private structure not found in send_digit.\n");
847                 return -1;
848         }
849         memset(&f, 0, sizeof(f));
850         f.frametype = AST_FRAME_DTMF;
851     f.subclass = digit;
852     f.datalen = 0;
853     f.samples = 300;
854         f.offset = 0;
855         f.data = NULL;
856     f.mallocd = 0;
857     f.src = "SEND_DIGIT";
858         
859         return ast_queue_frame(p->owner, &f, 1);        
860 }
861
862 /**
863   * Call-back function that gets called when any H.323 connection is made
864   *
865   * Returns the local RTP port
866   */
867 int create_connection(unsigned call_reference)
868 {       
869         struct oh323_pvt *p;
870         struct sockaddr_in us;
871
872         p = find_call(call_reference);
873
874         if (!p) {
875                 ast_log(LOG_ERROR, "Unable to allocate private structure, this is very bad.\n");
876                 return -1;
877         }
878
879         /* figure out our local RTP port and tell the H.323 stack about it*/
880         ast_rtp_get_us(p->rtp, &us);
881         return ntohs(us.sin_port);
882 }
883
884 /**
885  *  Call-back function for incoming calls
886  *
887  *  Returns 1 on success
888  */
889
890 int setup_incoming_call(call_details_t cd)
891 {
892         
893         struct oh323_pvt *p = NULL;
894         struct ast_channel *c = NULL;
895         struct oh323_user *user = NULL;
896         struct oh323_alias *alias = NULL;
897
898         /* allocate the call*/
899         p = oh323_alloc(cd.call_reference);
900
901         if (!p) {
902                 ast_log(LOG_ERROR, "Unable to allocate private structure, this is bad.\n");
903                 return 0;
904         }
905
906         /* Populate the call details in the private structure */
907         p->cd.call_token = cd.call_token;
908         p->cd.call_source_aliases = cd.call_source_aliases;
909         p->cd.call_dest_alias = cd.call_dest_alias;
910         p->cd.call_source_e164 = cd.call_source_e164;
911         p->cd.call_dest_e164 = cd.call_dest_e164;
912
913         if (h323debug) {
914                 printf("        == Setting up Call\n");
915                 printf("           -- Calling party name:  %s\n", p->cd.call_source_aliases);
916                 printf("           -- Calling party number:  %s\n", p->cd.call_source_e164);
917                 printf("           -- Called  party name:  %s\n", p->cd.call_dest_alias);
918                 printf("           -- Called  party number:  %s\n", p->cd.call_dest_e164);
919         }
920
921         /* Decide if we are allowing Gatekeeper routed calls*/
922         if ((!strcasecmp(cd.sourceIp, gatekeeper)) && (gkroute == -1) && (usingGk == 1)) {
923                 
924                 if (strlen(cd.call_dest_e164)) {
925                         strncpy(p->exten, cd.call_dest_e164, sizeof(p->exten)-1);
926                         strncpy(p->context, default_context, sizeof(p->context)-1); 
927                 } else {
928                         alias = find_alias(cd.call_dest_alias);
929                 
930                         if (!alias) {
931                                 ast_log(LOG_ERROR, "Call for %s rejected, alias not found\n", cd.call_dest_alias);
932                                 return 0;
933                         }
934                         printf("Alias found: %s and %s\n", alias->name, alias->context);
935
936                         strncpy(p->exten, alias->name, sizeof(p->exten)-1);
937                         strncpy(p->context, alias->context, sizeof(p->context)-1);
938                 }
939
940                 sprintf(p->callerid, "%s <%s>", p->cd.call_source_aliases, p->cd.call_source_e164);
941
942         } else { 
943                 /* Either this call is not from the Gatekeeper 
944                    or we are not allowing gk routed calls */
945                 
946                 user  = find_user(cd.call_source_aliases);
947                 
948                 if (!user) {
949                         sprintf(p->callerid, "%s <%s>", p->cd.call_source_aliases, p->cd.call_source_e164); 
950                         if (strlen(p->cd.call_dest_e164)) {
951                                 strncpy(p->exten, cd.call_dest_e164, sizeof(p->exten)-1);
952                         } else {
953                                 strncpy(p->exten, cd.call_dest_alias, sizeof(p->exten)-1);              
954                         }
955                         if (!strlen(default_context)) {
956                                 ast_log(LOG_ERROR, "Call from user '%s' rejected due to no default context\n", p->cd.call_source_aliases);
957                                 return 0;
958                         }
959                         strncpy(p->context, default_context, sizeof(p->context)-1);
960                         ast_log(LOG_DEBUG, "Sending %s to context [%s]\n", cd.call_source_aliases, p->context);
961                 } else {
962                         if (user->host) {
963                                 if (strcasecmp(cd.sourceIp, inet_ntoa(user->addr.sin_addr))){
964                                         ast_log(LOG_ERROR, "Call from user '%s' rejected due to non-matching IP address of '%s'\n", user->name, cd.sourceIp);
965                                         return 0;
966                                 }
967                         }
968                         if (user->incominglimit > 0) {
969                                 if (user->inUse >= user->incominglimit) {
970                                         ast_log(LOG_ERROR, "Call from user '%s' rejected due to usage limit of %d\n", user->name, user->incominglimit);
971                                         return 0;
972                                 }
973                         }
974                         strncpy(p->context, user->context, sizeof(p->context)-1);
975                         p->bridge = user->bridge;
976
977                         if (strlen(user->callerid) && strlen(p->callerid)) 
978                                 strncpy(p->callerid, user->callerid, sizeof(p->callerid) - 1);
979                         else
980                                 sprintf(p->callerid, "%s <%s>", p->cd.call_source_aliases, p->cd.call_source_e164); 
981         
982                         if (strlen(p->cd.call_dest_e164)) {
983                                 strncpy(p->exten, cd.call_dest_e164, sizeof(p->exten)-1);
984                         } else {
985                                 strncpy(p->exten, cd.call_dest_alias, sizeof(p->exten)-1);              
986                         }
987
988                         if (strlen(user->accountcode)) {
989                                 strncpy(p->accountcode, user->accountcode, sizeof(p->accountcode)-1);
990                         }
991         
992                         /* Increment the usage counter */
993                         user->inUse++;
994                 } 
995         }
996         
997         /* allocate a channel and tell asterisk about it */
998         c = oh323_new(p, AST_STATE_RINGING, cd.call_token);
999
1000         if (!c) {
1001                 ast_log(LOG_ERROR, "Couldn't create channel. This is bad\n");
1002                 return 0;
1003         }
1004
1005         return 1;
1006 }
1007
1008 /**
1009  * Call-back function to establish an outgoing H.323 call
1010  * 
1011  * Returns 1 on success 
1012  */
1013 int setup_outgoing_call(call_details_t cd)
1014 {       
1015         return 1;
1016 }
1017
1018 #if 0
1019 if (p->inUse >= p->outgoinglimit) {
1020         ast_log(LOG_ERROR, "Call to %s rejected due to usage limit of %d outgoing channels\n", p->name, p->inUse);
1021         return 0;
1022 }
1023
1024 if (!p) {
1025         ast_log(LOG_ERROR, "Rejecting call: peer %s not found\n", dest_peer);
1026         return 0;
1027 }
1028 #endif
1029
1030 /**
1031   * Call-back function that gets called for each rtp channel opened 
1032   *
1033   * Returns nothing 
1034   */
1035 void setup_rtp_connection(unsigned call_reference, const char *remoteIp, int remotePort)
1036 {
1037         struct oh323_pvt *p = NULL;
1038         struct sockaddr_in them;
1039
1040         /* Find the call or allocate a private structure if call not found */
1041         p = find_call(call_reference);
1042
1043         if (!p) {
1044                 ast_log(LOG_ERROR, "Something is wrong: rtp\n");
1045                 return;
1046         }
1047
1048         them.sin_family = AF_INET;
1049         them.sin_addr.s_addr = inet_addr(remoteIp); // only works for IPv4
1050         them.sin_port = htons(remotePort);
1051         ast_rtp_set_peer(p->rtp, &them);
1052
1053         return;
1054 }
1055
1056 /**  
1057   *     Call-back function to signal asterisk that the channel has been answered 
1058   * Returns nothing
1059   */
1060 void connection_made(unsigned call_reference)
1061 {
1062         struct ast_channel *c = NULL;
1063         struct oh323_pvt *p = NULL;
1064         
1065         p = find_call(call_reference);
1066         
1067         if (!p)
1068                 ast_log(LOG_ERROR, "Something is wrong: connection\n");
1069
1070
1071         if (!p->owner) {
1072                 printf("Channel has no owner\n");
1073                 return;
1074         }
1075         c = p->owner;   
1076
1077         ast_setstate(c, AST_STATE_UP);
1078         return;
1079 }
1080
1081 /**
1082   * Call-back function to cleanup communication
1083   * Returns nothing,
1084   */
1085 void cleanup_connection(call_details_t cd)
1086 {       
1087         struct oh323_pvt *p = NULL;
1088 //      struct oh323_peer *peer = NULL;
1089         struct oh323_user *user = NULL;
1090         struct ast_rtp *rtp = NULL;
1091
1092         ast_log(LOG_DEBUG, "Cleaning up our mess\n");
1093         
1094         p = find_call(cd.call_reference);
1095
1096         if (!p) {
1097                 return;
1098         }
1099
1100         /* Decrement usage counter */
1101         if (!p->outgoing) {
1102                 user = find_user(cd.call_source_aliases);
1103                 
1104                 if(user)
1105                         user->inUse--;
1106         }
1107
1108 #if 0
1109                 if (p->outgoing) {
1110                 peer = find_peer(cd.call_dest_alias);
1111                 peer->inUse--;
1112         } else {
1113                 user = find_user(cd.call_source_aliases);
1114                 user->inUse--;
1115         }
1116 #endif
1117         
1118         if (p->rtp) {
1119                 rtp = p->rtp;
1120                 p->rtp = NULL;
1121                 /* Immediately stop RTP */
1122                 ast_rtp_destroy(rtp);
1123         }
1124         
1125         p->alreadygone = 1;
1126
1127         /* Send hangup */       
1128         if (p->owner)
1129                 ast_queue_hangup(p->owner, 1);
1130
1131         p = NULL;
1132         return; 
1133 }
1134
1135 static void *do_monitor(void *data)
1136 {
1137         int res;
1138         struct oh323_pvt *oh323 = NULL;
1139         
1140                 for(;;) {
1141                 /* Check for interfaces needing to be killed */
1142                 ast_pthread_mutex_lock(&iflock);
1143 restartsearch:          
1144                 oh323 = iflist;
1145                 while(oh323) {
1146                         if (oh323->needdestroy) {
1147                                 __oh323_destroy(oh323);
1148                                 goto restartsearch;
1149                         }
1150                         oh323 = oh323->next;
1151                 }
1152                 ast_pthread_mutex_unlock(&iflock);
1153
1154                 pthread_testcancel();
1155
1156                 /* Wait for sched or io */
1157                 res = ast_sched_wait(sched);
1158                 if ((res < 0) || (res > 1000))
1159                         res = 1000;
1160                 res = ast_io_wait(io, res);
1161                 ast_pthread_mutex_lock(&monlock);
1162                 if (res >= 0) 
1163                         ast_sched_runq(sched);
1164                 ast_pthread_mutex_unlock(&monlock);
1165         }
1166         /* Never reached */
1167         return NULL;
1168         
1169 }
1170
1171 static int restart_monitor(void)
1172 {
1173         /* If we're supposed to be stopped -- stay stopped */
1174         if (monitor_thread == -2)
1175                 return 0;
1176         if (ast_pthread_mutex_lock(&monlock)) {
1177                 ast_log(LOG_WARNING, "Unable to lock monitor\n");
1178                 return -1;
1179         }
1180         if (monitor_thread == pthread_self()) {
1181                 ast_pthread_mutex_unlock(&monlock);
1182                 ast_log(LOG_WARNING, "Cannot kill myself\n");
1183                 return -1;
1184         }
1185         if (monitor_thread) {
1186                 /* Wake up the thread */
1187                 pthread_kill(monitor_thread, SIGURG);
1188         } else {
1189                 /* Start a new monitor */
1190                 if (pthread_create(&monitor_thread, NULL, do_monitor, NULL) < 0) {
1191                         ast_pthread_mutex_unlock(&monlock);
1192                         ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
1193                         return -1;
1194                 }
1195         }
1196         ast_pthread_mutex_unlock(&monlock);
1197         return 0;
1198 }
1199
1200 static int h323_do_trace(int fd, int argc, char *argv[])
1201 {
1202         if (argc != 3)
1203                 return RESULT_SHOWUSAGE;
1204         
1205         h323_debug(1, atoi(argv[2]));
1206         ast_cli(fd, "H.323 trace set to level %s\n", argv[2]);
1207         return RESULT_SUCCESS;
1208 }
1209
1210 static int h323_no_trace(int fd, int argc, char *argv[])
1211 {
1212         if (argc != 3)
1213                 return RESULT_SHOWUSAGE;
1214
1215         h323_debug(0,0);
1216         ast_cli(fd, "H.323 trace disabled\n");
1217         return RESULT_SUCCESS;
1218 }
1219
1220 static int h323_do_debug(int fd, int argc, char *argv[])
1221 {
1222         if (argc != 2)
1223                 return RESULT_SHOWUSAGE;
1224         
1225         h323debug = 1;
1226         ast_cli(fd, "H323 debug enabled\n");
1227         return RESULT_SUCCESS;
1228 }
1229
1230 static int h323_no_debug(int fd, int argc, char *argv[])
1231 {
1232         if (argc != 3)
1233                 return RESULT_SHOWUSAGE;
1234
1235         h323debug = 0;
1236         ast_cli(fd, "H323 Debug disabled\n");
1237         return RESULT_SUCCESS;
1238 }
1239
1240 static int h323_gk_cycle(int fd, int argc, char *argv[])
1241 {
1242         if (argc != 3)
1243                 return RESULT_SHOWUSAGE;
1244                 
1245         h323_gk_urq();
1246         
1247         /* Possibly register with a GK */
1248         if (!gatekeeper_disable) {
1249                 if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
1250                         ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
1251                         h323_end_process();
1252                 }
1253         }
1254
1255         return RESULT_SUCCESS;
1256 }
1257
1258
1259 static char trace_usage[] = 
1260 "Usage: h.323 trace <level num>\n"
1261 "       Enables H.323 stack tracing for debugging purposes\n";
1262
1263 static char no_trace_usage[] = 
1264 "Usage: h.323 no trace\n"
1265 "       Disables H.323 stack tracing for debugging purposes\n";
1266
1267 static char debug_usage[] = 
1268 "Usage: h.323 debug\n"
1269 "       Enables chan_h323 debug output\n";
1270
1271 static char no_debug_usage[] = 
1272 "Usage: h.323 no debug\n"
1273 "       Disables chan_h323 debug output\n";
1274
1275 static char show_codec_usage[] = 
1276 "Usage: h.323 show codec\n"
1277 "       Shows all enabled codecs\n";
1278
1279 static char show_cycle_usage[] = 
1280 "Usage: h.323 gk cycle\n"
1281 "       Manually re-register with the Gatekeper\n";
1282
1283
1284 static struct ast_cli_entry  cli_trace =
1285         { { "h.323", "trace", NULL }, h323_do_trace, "Enable H.323 Stack Tracing", trace_usage };
1286 static struct ast_cli_entry  cli_no_trace =
1287         { { "h.323", "no", "trace", NULL }, h323_no_trace, "Disable H.323 Stack Tracing", no_trace_usage };
1288 static struct ast_cli_entry  cli_debug =
1289         { { "h.323", "debug", NULL }, h323_do_debug, "Enable chan_h323 debug", debug_usage };
1290 static struct ast_cli_entry  cli_no_debug =
1291         { { "h.323", "no", "debug", NULL }, h323_no_debug, "Disable chan_h323 debug", no_debug_usage };
1292 static struct ast_cli_entry  cli_show_codecs =
1293         { { "h.323", "show", "codecs", NULL }, h323_show_codec, "Show enabled codecs", show_codec_usage };
1294 static struct ast_cli_entry  cli_gk_cycle =
1295         { { "h.323", "gk", "cycle", NULL }, h323_gk_cycle, "Manually re-register with the Gatekeper", show_cycle_usage };
1296
1297
1298
1299 int reload_config()
1300 {
1301         
1302         int format;
1303         struct ast_config *cfg;
1304         struct ast_variable *v;
1305         struct oh323_peer *peer   = NULL;
1306         struct oh323_user *user   = NULL;
1307         struct oh323_alias *alias = NULL;
1308         struct hostent *hp;
1309         char *cat;
1310     char *utype;
1311         
1312         cfg = ast_load(config);
1313
1314         /* We *must* have a config file otherwise stop immediately */
1315         if (!cfg) {
1316                 ast_log(LOG_NOTICE, "Unable to load config %s, H.323 disabled\n", config);
1317                 return 0;
1318         }
1319         
1320         h323debug=0;
1321         dtmfmode = H323_DTMF_RFC2833;
1322
1323         memset(&bindaddr, 0, sizeof(bindaddr));
1324
1325         v = ast_variable_browse(cfg, "general");
1326         while(v) {
1327                 /* Create the interface list */
1328                 if (!strcasecmp(v->name, "jitter")) {
1329                         jitter = (int) strtol(v->value, NULL, 10);
1330                         if (jitter < 20 || jitter > 10000) {
1331                                 ast_log(LOG_NOTICE, "Invalid jitter value! Valid range: 20ms to 10000ms. Recommended: 100ms");
1332                                 ast_destroy(cfg);
1333                                 return 0;
1334                         } 
1335                 } else if (!strcasecmp(v->name, "port")) {
1336                         port = (int)strtol(v->value, NULL, 10);
1337                 } else if (!strcasecmp(v->name, "bindaddr")) {
1338                         if (!(hp = gethostbyname(v->value))) {
1339                                 ast_log(LOG_WARNING, "Invalid address: %s\n", v->value);
1340                         } else {
1341                                 memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
1342                         }
1343                 } else if (!strcasecmp(v->name, "allow")) {
1344                         format = ast_getformatbyname(v->value);
1345                         if (format < 1) 
1346                                 ast_log(LOG_WARNING, "Cannot allow unknown format '%s'\n", v->value);
1347                         else
1348                                 capability |= format;
1349                 } else if (!strcasecmp(v->name, "disallow")) {
1350                         format = ast_getformatbyname(v->value);
1351                         if (format < 1) 
1352                                 ast_log(LOG_WARNING, "Cannot disallow unknown format '%s'\n", v->value);
1353                         else
1354                                 capability &= ~format;
1355                 } else if (!strcasecmp(v->name, "tos")) {
1356                         if (sscanf(v->value, "%i", &format) == 1)
1357                                 tos = format & 0xff;
1358                         else if (!strcasecmp(v->value, "lowdelay"))
1359                                 tos = IPTOS_LOWDELAY;
1360                         else if (!strcasecmp(v->value, "throughput"))
1361                                 tos = IPTOS_THROUGHPUT;
1362                         else if (!strcasecmp(v->value, "reliability"))
1363                                 tos = IPTOS_RELIABILITY;
1364                         else if (!strcasecmp(v->value, "mincost"))
1365                                 tos = IPTOS_MINCOST;
1366                         else if (!strcasecmp(v->value, "none"))
1367                                 tos = 0;
1368                         else
1369                                 ast_log(LOG_WARNING, "Invalid tos value at line %d, should be 'lowdelay', 'throughput', 'reliability', 'mincost', or 'none'\n", v->lineno);
1370                 } else if (!strcasecmp(v->name, "gatekeeper")) {
1371                         if (!strcasecmp(v->value, "DISABLE")) {
1372                                 gatekeeper_disable = 1;
1373                                 usingGk = 0;
1374                         } else if (!strcasecmp(v->value, "DISCOVER")) {
1375                                 gatekeeper_disable = 0;
1376                                 gatekeeper_discover = 1;
1377                                 usingGk = 1;
1378                         } else {
1379                                 gatekeeper_disable = 0;
1380                                 usingGk = 1;
1381                                 strncpy(gatekeeper, v->value, sizeof(gatekeeper)-1);
1382                         }
1383                 } else if (!strcasecmp(v->name, "secret")) {
1384                                 strncpy(secret, v->value, sizeof(secret)-1);
1385                 } else if (!strcasecmp(v->name, "AllowGKRouted")) {
1386                                 gkroute = ast_true(v->value);
1387                 } else if (!strcasecmp(v->name, "context")) {
1388                         strncpy(default_context, v->value, sizeof(default_context)-1);
1389                         printf("  == Setting default context to %s\n", default_context);        
1390                 } else if (!strcasecmp(v->name, "manual")) {
1391                                 manual = ast_true(v->value);
1392                 } else if (!strcasecmp(v->name, "dtmfmode")) {
1393                         if (!strcasecmp(v->value, "inband"))
1394                                 dtmfmode=H323_DTMF_INBAND;
1395                         else if (!strcasecmp(v->value, "rfc2833"))
1396                                 dtmfmode = H323_DTMF_RFC2833;
1397                         else {
1398                                 ast_log(LOG_WARNING, "Unknown dtmf mode '%s', using rfc2833\n", v->value);
1399                                 dtmfmode = H323_DTMF_RFC2833;
1400                         }
1401                 }
1402                 v = v->next;    
1403         }
1404         
1405         cat = ast_category_browse(cfg, NULL);
1406         while(cat) {
1407                 if (strcasecmp(cat, "general")) {
1408                         utype = ast_variable_retrieve(cfg, cat, "type");
1409                         if (utype) {
1410                                 if (!strcasecmp(utype, "user") || !strcasecmp(utype, "friend")) {
1411                                         user = build_user(cat, ast_variable_browse(cfg, cat));
1412                                         if (user) {
1413                                                 ast_pthread_mutex_lock(&userl.lock);
1414                                                 user->next = userl.users;
1415                                                 userl.users = user;
1416                                                 ast_pthread_mutex_unlock(&userl.lock);
1417                                         }
1418                                 }  else if (!strcasecmp(utype, "peer") || !strcasecmp(utype, "friend")) {
1419                                         peer = build_peer(cat, ast_variable_browse(cfg, cat));
1420                                         if (peer) {
1421                                                 ast_pthread_mutex_lock(&peerl.lock);
1422                                                 peer->next = peerl.peers;
1423                                                 peerl.peers = peer;
1424                                                 ast_pthread_mutex_unlock(&peerl.lock);
1425                                         }
1426                                 }  else if (!strcasecmp(utype, "h323")) {                       
1427                                         alias = build_alias(cat, ast_variable_browse(cfg, cat));
1428                                         if (alias) {
1429                                                 ast_pthread_mutex_lock(&aliasl.lock);
1430                                                 alias->next = aliasl.aliases;
1431                                                 aliasl.aliases = alias;
1432                                                 ast_pthread_mutex_unlock(&aliasl.lock);
1433                                         }
1434                                 } else {
1435                                         ast_log(LOG_WARNING, "Unknown type '%s' for '%s' in %s\n", utype, cat, config);
1436                                 }
1437                         } else
1438                                 ast_log(LOG_WARNING, "Section '%s' lacks type\n", cat);
1439                 }
1440                 cat = ast_category_browse(cfg, cat);
1441         }
1442
1443         /* Register our H.323 aliases if any*/
1444         while (alias) {         
1445                 if (h323_set_alias(alias)) {
1446                         ast_log(LOG_ERROR, "Alias %s rejected by endpoint\n", alias->name);
1447                         return -1;
1448                 }       
1449                 alias = alias->next;
1450         }
1451
1452         /* Add some capabilities */
1453         if(h323_set_capability(capability, dtmfmode)) {
1454                 ast_log(LOG_ERROR, "Capabilities failure, this is bad.\n");
1455                 return -1;
1456         }       
1457
1458         printf("CONTEXT RELOAD: [%s]\n", default_context);
1459
1460         ast_destroy(cfg);
1461
1462         return 0;
1463 }
1464
1465 void delete_users(void)
1466 {
1467         struct oh323_user *user, *userlast;
1468         struct oh323_peer *peer;
1469         
1470         /* Delete all users */
1471         ast_pthread_mutex_lock(&userl.lock);
1472         for (user=userl.users;user;) {
1473                 userlast = user;
1474                 user=user->next;
1475                 free(userlast);
1476         }
1477         userl.users=NULL;
1478         ast_pthread_mutex_unlock(&userl.lock);
1479         ast_pthread_mutex_lock(&peerl.lock);
1480         for (peer=peerl.peers;peer;) {
1481                 /* Assume all will be deleted, and we'll find out for sure later */
1482                 peer->delme = 1;
1483                 peer = peer->next;
1484         }
1485         ast_pthread_mutex_unlock(&peerl.lock);
1486 }
1487
1488 void delete_aliases(void)
1489 {
1490         struct oh323_alias *alias, *aliaslast;
1491                 
1492         /* Delete all users */
1493         ast_pthread_mutex_lock(&aliasl.lock);
1494         for (alias=aliasl.aliases;alias;) {
1495                 aliaslast = alias;
1496                 alias=alias->next;
1497                 free(aliaslast);
1498         }
1499         aliasl.aliases=NULL;
1500         ast_pthread_mutex_unlock(&aliasl.lock);
1501 }
1502
1503 void prune_peers(void)
1504 {
1505         /* Prune peers who still are supposed to be deleted */
1506         struct oh323_peer *peer, *peerlast, *peernext;
1507         ast_pthread_mutex_lock(&peerl.lock);
1508         peerlast = NULL;
1509         for (peer=peerl.peers;peer;) {
1510                 peernext = peer->next;
1511                 if (peer->delme) {
1512                         free(peer);
1513                         if (peerlast)
1514                                 peerlast->next = peernext;
1515                         else
1516                                 peerl.peers = peernext;
1517                 } else
1518                         peerlast = peer;
1519                 peer=peernext;
1520         }
1521         ast_pthread_mutex_unlock(&peerl.lock);
1522 }
1523
1524 int reload(void)
1525 {
1526         delete_users();
1527         delete_aliases();
1528         prune_peers();
1529
1530         if (strlen(gatekeeper)) {
1531                 h323_gk_urq();
1532         }
1533
1534         reload_config();
1535
1536         /* Possibly register with a GK */
1537         if (!gatekeeper_disable) {
1538                 if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
1539                         ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
1540                         h323_end_process();
1541                         return -1;
1542                 }
1543         }
1544         restart_monitor();
1545         return 0;
1546 }
1547
1548
1549 static struct ast_rtp *oh323_get_rtp_peer(struct ast_channel *chan)
1550 {
1551         struct oh323_pvt *p;
1552         p = chan->pvt->pvt;
1553         if (p && p->rtp && p->bridge)
1554                 return p->rtp;
1555         return NULL;
1556 }
1557
1558 static int oh323_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp)
1559 {
1560         struct oh323_pvt *p;
1561         struct sockaddr_in them;
1562         struct sockaddr_in us;
1563
1564         if (!rtp) 
1565                 return 0;
1566
1567         p = chan->pvt->pvt;
1568         if (!p) {
1569                 ast_log(LOG_ERROR, "No Private Structure, this is bad\n");
1570                 return -1;
1571         }
1572
1573         ast_rtp_get_peer(rtp, &them);   
1574         printf("peer is now: %s\n", inet_ntoa(them.sin_addr));
1575                 
1576         ast_rtp_set_peer(p->rtp, &them);
1577         ast_rtp_get_us(p->rtp, &us);
1578
1579         h323_native_bridge(p->cd.call_token, inet_ntoa(them.sin_addr), inet_ntoa(us.sin_addr));
1580         
1581         return 0;
1582         
1583 }
1584
1585 static struct ast_rtp_protocol oh323_rtp = {
1586         get_rtp_info: oh323_get_rtp_peer,
1587         set_rtp_peer: oh323_set_rtp_peer,
1588 };
1589
1590 int load_module()
1591 {
1592         int res;
1593
1594         /* fire up the H.323 Endpoint */ 
1595         h323_end_point_create();
1596
1597         res = reload_config();
1598         if (!res) {
1599         /* Make sure we can register our channel type */
1600                 if (ast_channel_register(type, tdesc, capability, oh323_request)) {
1601                         ast_log(LOG_ERROR, "Unable to register channel class %s\n", type);
1602                         h323_end_process();
1603                         return -1;
1604                 }
1605                 ast_cli_register(&cli_debug);
1606                 ast_cli_register(&cli_no_debug);
1607                 ast_cli_register(&cli_trace);
1608                 ast_cli_register(&cli_no_trace);
1609                 ast_cli_register(&cli_show_codecs);
1610                 ast_cli_register(&cli_gk_cycle);
1611
1612                 oh323_rtp.type = type;
1613                 ast_rtp_proto_register(&oh323_rtp);
1614
1615                 sched = sched_context_create();
1616                 if (!sched) {
1617                         ast_log(LOG_WARNING, "Unable to create schedule context\n");
1618                 }
1619                 io = io_context_create();
1620                 if (!io) {
1621                         ast_log(LOG_WARNING, "Unable to create I/O context\n");
1622                 }
1623                 
1624                 /* Register our callback functions */
1625                 h323_callback_register(setup_incoming_call, 
1626                                                            setup_outgoing_call, 
1627                                                            create_connection, 
1628                                                            setup_rtp_connection, 
1629                                                            cleanup_connection, 
1630                                                            connection_made, send_digit);        
1631         
1632                 /* start the h.323 listener */
1633                 if (h323_start_listener(port, bindaddr, jitter)) {
1634                         ast_log(LOG_ERROR, "Unable to create H323 listener.\n");
1635                         h323_end_process();
1636                         return -1;
1637                 }
1638
1639                 /* Possibly register with a GK */
1640                 if (!gatekeeper_disable) {
1641                         if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
1642                                 ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
1643                                 h323_end_process();
1644                                 return -1;
1645                         }
1646                 }
1647                 /* And start the monitor for the first time */
1648                 restart_monitor();
1649         } else {
1650                 h323_end_process();
1651         }
1652         return res;
1653 }
1654 int unload_module() 
1655 {
1656         struct oh323_pvt *p, *pl;
1657                 
1658         if (!ast_pthread_mutex_lock(&iflock)) {
1659         /* hangup all interfaces if they have an owner */
1660         p = iflist;
1661         while(p) {
1662                 if (p->owner)
1663                         ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
1664                 p = p->next;
1665         }
1666         iflist = NULL;
1667         ast_pthread_mutex_unlock(&iflock);
1668         } else {
1669                 ast_log(LOG_WARNING, "Unable to lock the interface list\n");
1670                 return -1;
1671         }
1672                 
1673         if (!ast_pthread_mutex_lock(&iflock)) {
1674                 /* destroy all the interfaces and free their memory */
1675                 p = iflist;
1676                 while(p) {
1677                         pl = p;
1678                         p = p->next;
1679                         /* free associated memory */
1680                         free(pl);
1681                 }
1682                 iflist = NULL;
1683                 ast_pthread_mutex_unlock(&iflock);
1684         } else {
1685                 ast_log(LOG_WARNING, "Unable to lock the interface list\n");
1686                 return -1;
1687         }
1688         h323_gk_urq();
1689         h323_end_process();
1690
1691         /* unregister channel type */
1692         ast_channel_unregister(type);
1693
1694         return 0;
1695
1696 }
1697
1698 int usecount()
1699 {
1700         int res;
1701         ast_pthread_mutex_lock(&usecnt_lock);
1702         res = usecnt;
1703         ast_pthread_mutex_unlock(&usecnt_lock);
1704         return res;
1705 }
1706
1707 char *description()
1708 {
1709         return desc;
1710 }
1711
1712 char *key()
1713 {
1714         return ASTERISK_GPL_KEY;
1715 }
1716
1717
1718
1719