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