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