channels/chan_h323.c

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