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 #ifdef __OpenBSD__
  58 #include <netinet/in_systm.h>
  59 #ifndef IPTOS_MINCOST
  60 #define IPTOS_MINCOST 0x02
  61 #endif
  62 #endif
  63 #include <netinet/ip.h>
  64
  65 #include "h323/chan_h323.h"
  66
  67 /** String variables required by ASTERISK */
  68 static char *type       = "H323";
  69 static char *desc       = "The NuFone Network's Open H.323 Channel Driver";
  70 static char *tdesc      = "The NuFone Network's Open H.323 Channel Driver";
  71 static char *config = "h323.conf";
  72
  73 static char default_context[AST_MAX_EXTENSION];
  74
  75 /** H.323 configuration values */
  76 static char gatekeeper[100];
  77 static int  gatekeeper_disable = 1;
  78 static int  gatekeeper_discover = 0;
  79 static int  usingGk;
  80 static int  port = 1720;
  81 static int  gkroute = 0;
  82
  83 /* to find user by alias is default, alternative is the incomming call's source IP address*/
  84 static int  userbyalias = 1;
  85
  86 static int  bridge_default = 1;
  87
  88 /* Just about everybody seems to support ulaw, so make it a nice default */
  89 static int capability = AST_FORMAT_ULAW;
  90
  91 /* TOS flag */
  92 static int tos = 0;
  93
  94 static int dtmfmode = H323_DTMF_RFC2833;
  95
  96 static char secret[50];
  97
  98 /** Private structure of a OpenH323 channel */
  99 struct oh323_pvt {
 100         ast_mutex_t lock;                                       /* Channel private lock */
 101         call_options_t calloptions;                             /* Options to be used during call setup */
 102         int alreadygone;                                        /* Whether or not we've already been destroyed by or peer */
 103         int needdestroy;                                        /* if we need to be destroyed */
 104         call_details_t cd;                                      /* Call details */
 105         struct ast_channel *owner;                              /* Who owns us */
 106         int capability;                                         /* audio capability */
 107         int nonCodecCapability;                                 /* non-audio capability */
 108         int outgoing;                                           /* Outgoing or incoming call? */
 109         int nat;                                                /* Are we talking to a NAT EP?*/
 110         int bridge;                                             /* Determine of we should native bridge or not*/
 111         char exten[AST_MAX_EXTENSION];                          /* Requested extension */
 112         char context[AST_MAX_EXTENSION];                        /* Context where to start */
 113         char username[81];                                      /* H.323 alias using this channel */
 114         char accountcode[256];                                  /* Account code */
 115         int amaflags;                                           /* AMA Flags */
 116         char callerid[80];                                      /* Caller*ID if available */
 117         struct ast_rtp *rtp;                                    /* RTP Session */
 118         int dtmfmode;                                           /* What DTMF Mode is being used */
 119         struct ast_dsp *vad;                                    /* Used for in-band DTMF detection */
 120         struct oh323_pvt *next;                                 /* Next channel in list */
 121 } *iflist = NULL;
 122
 123 static struct ast_user_list {
 124         struct oh323_user *users;
 125         ast_mutex_t lock;
 126 } userl = { NULL, AST_MUTEX_INITIALIZER };
 127
 128 static struct ast_peer_list {
 129         struct oh323_peer *peers;
 130         ast_mutex_t lock;
 131 } peerl = { NULL, AST_MUTEX_INITIALIZER };
 132
 133 static struct ast_alias_list {
 134         struct oh323_alias *aliases;
 135         ast_mutex_t lock;
 136 } aliasl = { NULL, AST_MUTEX_INITIALIZER };
 137
 138 /** Asterisk RTP stuff*/
 139 static struct sched_context *sched;
 140 static struct io_context *io;
 141
 142 /** Protect the interface list (of oh323_pvt's) */
 143 static ast_mutex_t iflock = AST_MUTEX_INITIALIZER;
 144
 145 /** Usage counter and associated lock */
 146 static int usecnt =0;
 147 static ast_mutex_t usecnt_lock = AST_MUTEX_INITIALIZER;
 148
 149 /* Protect the monitoring thread, so only one process can kill or start it, and not
 150    when it's doing something critical. */
 151 static ast_mutex_t monlock = AST_MUTEX_INITIALIZER;
 152
 153 /* This is the thread for the monitor which checks for input on the channels
 154    which are not currently in use.  */
 155 static pthread_t monitor_thread = AST_PTHREADT_NULL;
 156
 157 static int restart_monitor(void);
 158
 159 static void __oh323_destroy(struct oh323_pvt *p)
 160 {
 161         struct oh323_pvt *cur, *prev = NULL;
 162
 163         if (p->rtp) {
 164                 ast_rtp_destroy(p->rtp);
 165         }
 166
 167         /* Unlink us from the owner if we have one */
 168         if (p->owner) {
 169                 ast_mutex_lock(&p->owner->lock);
 170                 ast_log(LOG_DEBUG, "Detaching from %s\n", p->owner->name);
 171                 p->owner->pvt->pvt = NULL;
 172                 ast_mutex_unlock(&p->owner->lock);
 173         }
 174         cur = iflist;
 175         while(cur) {
 176                 if (cur == p) {
 177                         if (prev)
 178                                 prev->next = cur->next;
 179                         else
 180                                 iflist = cur->next;
 181                         break;
 182                 }
 183                 prev = cur;
 184                 cur = cur->next;
 185         }
 186         if (!cur) {
 187                 ast_log(LOG_WARNING, "%p is not in list?!?! \n", cur);
 188         } else
 189                 free(p);
 190 }
 191
 192 static void oh323_destroy(struct oh323_pvt *p)
 193 {
 194         ast_mutex_lock(&iflock);
 195         __oh323_destroy(p);
 196         ast_mutex_unlock(&iflock);
 197 }
 198
 199 static struct oh323_alias *build_alias(char *name, struct ast_variable *v)
 200 {
 201         struct oh323_alias *alias;
 202
 203         alias = (struct oh323_alias *)malloc(sizeof(struct oh323_alias));
 204
 205         if (alias) {
 206                 memset(alias, 0, sizeof(struct oh323_alias));
 207                 strncpy(alias->name, name, sizeof(alias->name)-1);
 208
 209                 while (v) {
 210                         if (!strcasecmp(v->name, "e164")) {
 211                                 strncpy(alias->e164,  v->value, sizeof(alias->e164)-1);
 212                         } else if (!strcasecmp(v->name, "prefix")) {
 213                                 strncpy(alias->prefix,  v->value, sizeof(alias->prefix)-1);
 214                         } else if (!strcasecmp(v->name, "context")) {
 215                                 strncpy(alias->context,  v->value, sizeof(alias->context)-1);
 216                         } else if (!strcasecmp(v->name, "secret")) {
 217                                 strncpy(alias->secret,  v->value, sizeof(alias->secret)-1);
 218                         } else {
 219                                 if (strcasecmp(v->value, "h323")) {
 220                                         ast_log(LOG_WARNING, "Keyword %s does not make sense in type=h323\n", v->value);
 221                                 }
 222                         }
 223                         v = v->next;
 224                 }
 225         }
 226         return alias;
 227 }
 228
 229 static struct oh323_user *build_user(char *name, struct ast_variable *v)
 230 {
 231         struct oh323_user *user;
 232         int format;
 233
 234         user = (struct oh323_user *)malloc(sizeof(struct oh323_user));
 235         if (user) {
 236                 memset(user, 0, sizeof(struct oh323_user));
 237                 strncpy(user->name, name, sizeof(user->name)-1);
 238
 239                 /* set the usage flag to a sane starting value*/
 240                 user->inUse = 0;
 241                 /* Assume we can native bridge */
 242                 user->bridge = bridge_default;
 243
 244                 while(v) {
 245                         if (!strcasecmp(v->name, "context")) {
 246                                 strncpy(user->context, v->value, sizeof(user->context)-1);
 247                         } else if (!strcasecmp(v->name, "bridge")) {
 248                                 user->bridge = ast_true(v->value);
 249                       } else if (!strcasecmp(v->name, "nat")) {
 250                               user->nat = ast_true(v->value);
 251                         } else if (!strcasecmp(v->name, "noFastStart")) {
 252                                 user->noFastStart = ast_true(v->value);
 253                         } else if (!strcasecmp(v->name, "noH245Tunneling")) {
 254                                 user->noH245Tunneling = ast_true(v->value);
 255                         } else if (!strcasecmp(v->name, "noSilenceSuppression")) {
 256                                 user->noSilenceSuppression = ast_true(v->value);
 257                         } else if (!strcasecmp(v->name, "secret")) {
 258                                 strncpy(user->secret, v->value, sizeof(user->secret)-1);
 259                         } else if (!strcasecmp(v->name, "callerid")) {
 260                                 strncpy(user->callerid, v->value, sizeof(user->callerid)-1);
 261                         } else if (!strcasecmp(v->name, "accountcode")) {
 262                                 strncpy(user->accountcode, v->value, sizeof(user->accountcode)-1);
 263                         } else if (!strcasecmp(v->name, "incominglimit")) {
 264                                 user->incominglimit = atoi(v->value);
 265                                 if (user->incominglimit < 0)
 266                                         user->incominglimit = 0;
 267                         } else if (!strcasecmp(v->name, "host")) {
 268                                 if (!strcasecmp(v->value, "dynamic")) {
 269                                         ast_log(LOG_ERROR, "Dynamic host configuration not implemented, yet!\n");
 270                                         free(user);
 271                                         return NULL;
 272                                 } else if (ast_get_ip(&user->addr, v->value)) {
 273                                         free(user);
 274                                         return NULL;
 275                                 }
 276                                 /* Let us know we need to use ip authentication */
 277                                 user->host = 1;
 278                         } else if (!strcasecmp(v->name, "amaflags")) {
 279                                 format = ast_cdr_amaflags2int(v->value);
 280                                 if (format < 0) {
 281                                         ast_log(LOG_WARNING, "Invalid AMA Flags: %s at line %d\n", v->value, v->lineno);
 282                                 } else {
 283                                         user->amaflags = format;
 284                                 }
 285                         }
 286                         v = v->next;
 287                 }
 288         }
 289         return user;
 290 }
 291
 292
 293 static struct oh323_peer *build_peer(char *name, struct ast_variable *v)
 294 {
 295         struct oh323_peer *peer;
 296         struct oh323_peer *prev;
 297         int found=0;
 298
 299         prev = NULL;
 300         ast_mutex_lock(&peerl.lock);
 301         peer = peerl.peers;
 302
 303         while(peer) {
 304                 if (!strcasecmp(peer->name, name)) {
 305                         break;
 306                 }
 307                 prev = peer;
 308                 peer = peer->next;
 309         }
 310
 311         if (peer) {
 312                 found++;
 313                 /* Already in the list, remove it and it will be added back (or FREE'd) */
 314                 if (prev) {
 315                         prev->next = peer->next;
 316                 } else {
 317                         peerl.peers = peer->next;
 318                 }
 319                 ast_mutex_unlock(&peerl.lock);
 320         } else {
 321                 ast_mutex_unlock(&peerl.lock);
 322                 peer = malloc(sizeof(struct oh323_peer));
 323                 memset(peer, 0, sizeof(struct oh323_peer));
 324         }
 325         if (peer) {
 326                 if (!found) {
 327                         strncpy(peer->name, name, sizeof(peer->name)-1);
 328                 }
 329
 330                 /* set the usage flag to a sane starting value*/
 331                 peer->inUse = 0;
 332
 333                 while(v) {
 334                         if (!strcasecmp(v->name, "context")) {
 335                                 strncpy(peer->context, v->value, sizeof(peer->context)-1);
 336                         }  else if (!strcasecmp(v->name, "bridge")) {
 337                                 peer->bridge = ast_true(v->value);
 338                         } else if (!strcasecmp(v->name, "noFastStart")) {
 339                                 peer->noFastStart = ast_true(v->value);
 340                         } else if (!strcasecmp(v->name, "noH245Tunneling")) {
 341                                 peer->noH245Tunneling = ast_true(v->value);
 342                         } else if (!strcasecmp(v->name, "noSilenceSuppression")) {
 343                                 peer->noSilenceSuppression = ast_true(v->value);
 344                         } else if (!strcasecmp(v->name, "outgoinglimit")) {
 345                                 peer->outgoinglimit = atoi(v->value);
 346                                 if (peer->outgoinglimit > 0)
 347                                         peer->outgoinglimit = 0;
 348                         } else if (!strcasecmp(v->name, "host")) {
 349                                 if (!strcasecmp(v->value, "dynamic")) {
 350                                         ast_log(LOG_ERROR, "Dynamic host configuration not implemented, yet!\n");
 351                                         free(peer);
 352                                         return NULL;
 353                                 }
 354                                 if (ast_get_ip(&peer->addr, v->value)) {
 355                                                 free(peer);
 356                                                 return NULL;
 357                                 }
 358                         }
 359                         v=v->next;
 360                 }
 361         }
 362         return peer;
 363 }
 364
 365
 366
 367 /**
 368  * Send (play) the specified digit to the channel.
 369  *
 370  */
 371 static int oh323_digit(struct ast_channel *c, char digit)
 372 {
 373         struct oh323_pvt *p = c->pvt->pvt;
 374         if (p && p->rtp && (p->dtmfmode & H323_DTMF_RFC2833)) {
 375                 ast_rtp_senddigit(p->rtp, digit);
 376         }
 377         /* If in-band DTMF is desired, send that */
 378         if (p->dtmfmode & H323_DTMF_INBAND)
 379                 h323_send_tone(p->cd.call_token, digit);
 380         return 0;
 381 }
 382
 383
 384 /**
 385  * Make a call over the specified channel to the specified
 386  * destination. This function will parse the destination string
 387  * and determine the address-number to call.
 388  * Return -1 on error, 0 on success.
 389  */
 390 static int oh323_call(struct ast_channel *c, char *dest, int timeout)
 391 {
 392         int res;
 393         struct oh323_pvt *p = c->pvt->pvt;
 394         char called_addr[256];
 395         char *tmp;
 396
 397         strtok_r(dest, "/", &(tmp));
 398
 399         ast_log(LOG_DEBUG, "dest=%s, timeout=%d.\n", dest, timeout);
 400
 401         if ((c->_state != AST_STATE_DOWN) && (c->_state != AST_STATE_RESERVED)) {
 402                 ast_log(LOG_WARNING, "Line is already in use (%s)\n", c->name);
 403                 return -1;
 404         }
 405
 406         /* outgoing call */
 407         p->outgoing = 1;
 408
 409         /* Clear the call token */
 410         if ((p->cd).call_token == NULL)
 411                 (p->cd).call_token = (char *)malloc(128);
 412
 413         memset((char *)(p->cd).call_token, 0, 128);
 414
 415         if (p->cd.call_token == NULL) {
 416                 ast_log(LOG_ERROR, "Not enough memory.\n");
 417                 return -1;
 418         }
 419
 420         /* Build the address to call */
 421         memset(called_addr, 0, sizeof(dest));
 422         memcpy(called_addr, dest, sizeof(called_addr));
 423
 424         /* Copy callerid, if there is any */
 425         if (c->callerid) {
 426                 char *tmp = strchr(c->callerid, '"');
 427                 if (!tmp) {
 428                         p->calloptions.callerid = malloc(80); // evil
 429                         // sprintf(p->calloptions.callerid, "\"%s\"", c->callerid);
 430                         sprintf(p->calloptions.callerid, "\"\" <%s>", c->callerid);
 431                 } else {
 432                         p->calloptions.callerid = strdup(c->callerid);
 433                 }
 434          }
 435
 436         res = h323_make_call(called_addr, &(p->cd), p->calloptions);
 437
 438         if (res) {
 439                 ast_log(LOG_NOTICE, "h323_make_call failed(%s)\n", c->name);
 440                 return -1;
 441         }
 442
 443         ast_setstate(c, AST_STATE_RINGING);
 444         return 0;
 445 }
 446
 447
 448 static int oh323_answer(struct ast_channel *c)
 449 {
 450         int res;
 451
 452         struct oh323_pvt *p = c->pvt->pvt;
 453
 454         res = h323_answering_call(p->cd.call_token, 0);
 455
 456         if (c->_state != AST_STATE_UP)
 457                 ast_setstate(c, AST_STATE_UP);
 458
 459         return res;
 460 }
 461
 462 static int oh323_hangup(struct ast_channel *c)
 463 {
 464         struct oh323_pvt *p = c->pvt->pvt;
 465         int needcancel = 0;
 466         if (h323debug)
 467                 ast_log(LOG_DEBUG, "oh323_hangup(%s)\n", c->name);
 468         if (!c->pvt->pvt) {
 469                 ast_log(LOG_DEBUG, "Asked to hangup channel not connected\n");
 470                 return 0;
 471         }
 472         ast_mutex_lock(&p->lock);
 473         /* Determine how to disconnect */
 474         if (p->owner != c) {
 475                 ast_log(LOG_WARNING, "Huh?  We aren't the owner?\n");
 476                 ast_mutex_unlock(&p->lock);
 477                 return 0;
 478         }
 479         if (!c || (c->_state != AST_STATE_UP))
 480                 needcancel = 1;
 481         /* Disconnect */
 482         p = c->pvt->pvt;
 483
 484         /* Free dsp used for in-band DTMF detection */
 485         if (p->vad) {
 486                 ast_dsp_free(p->vad);
 487         }
 488
 489         p->owner = NULL;
 490         c->pvt->pvt = NULL;
 491
 492         /* Start the process if it's not already started */
 493         if (!p->alreadygone) {
 494                 p->needdestroy = 1;
 495                 if (h323_clear_call((p->cd).call_token)) {
 496                         ast_log(LOG_DEBUG, "ClearCall failed.\n");
 497                 }
 498         }
 499
 500         /* Update usage counter */
 501         ast_mutex_lock(&usecnt_lock);
 502         usecnt--;
 503         if (usecnt < 0)
 504                 ast_log(LOG_WARNING, "Usecnt < 0\n");
 505         ast_mutex_unlock(&usecnt_lock);
 506         ast_update_use_count();
 507
 508         ast_mutex_unlock(&p->lock);
 509         return 0;
 510 }
 511
 512 static struct ast_frame *oh323_rtp_read(struct oh323_pvt *p)
 513 {
 514         /* Retrieve audio/etc from channel.  Assumes p->lock is already held. */
 515         struct ast_frame *f;
 516         static struct ast_frame null_frame = { AST_FRAME_NULL, };
 517
 518       /* Only apply it for the first packet, we just need the correct ip/port */
 519       if(p->nat)
 520       {
 521               ast_rtp_setnat(p->rtp,p->nat);
 522               p->nat = 0;
 523       }
 524
 525         f = ast_rtp_read(p->rtp);
 526         /* Don't send RFC2833 if we're not supposed to */
 527         if (f && (f->frametype == AST_FRAME_DTMF) && !(p->dtmfmode & H323_DTMF_RFC2833))
 528                 return &null_frame;
 529         if (p->owner) {
 530                 /* We already hold the channel lock */
 531                 if (f->frametype == AST_FRAME_VOICE) {
 532                         if (f->subclass != p->owner->nativeformats) {
 533                                 ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
 534                                 p->owner->nativeformats = f->subclass;
 535                                 ast_set_read_format(p->owner, p->owner->readformat);
 536                                 ast_set_write_format(p->owner, p->owner->writeformat);
 537                         }
 538
 539                         /* Do in-band DTMF detection */
 540                         if (p->dtmfmode & H323_DTMF_INBAND) {
 541                    f = ast_dsp_process(p->owner,p->vad,f);
 542                                    if (f->frametype == AST_FRAME_DTMF)
 543                                         ast_log(LOG_DEBUG, "Got in-band digit %c.\n", f->subclass);
 544             }
 545
 546
 547                 }
 548         }
 549         return f;
 550 }
 551
 552
 553 static struct ast_frame  *oh323_read(struct ast_channel *c)
 554 {
 555         struct ast_frame *fr;
 556         struct oh323_pvt *p = c->pvt->pvt;
 557         ast_mutex_lock(&p->lock);
 558         fr = oh323_rtp_read(p);
 559         ast_mutex_unlock(&p->lock);
 560         return fr;
 561 }
 562
 563 static int oh323_write(struct ast_channel *c, struct ast_frame *frame)
 564 {
 565         struct oh323_pvt *p = c->pvt->pvt;
 566         int res = 0;
 567         if (frame->frametype != AST_FRAME_VOICE) {
 568                 if (frame->frametype == AST_FRAME_IMAGE)
 569                         return 0;
 570                 else {
 571                         ast_log(LOG_WARNING, "Can't send %d type frames with H323 write\n", frame->frametype);
 572                         return 0;
 573                 }
 574         } else {
 575                 if (!(frame->subclass & c->nativeformats)) {
 576                         ast_log(LOG_WARNING, "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
 577                                 frame->subclass, c->nativeformats, c->readformat, c->writeformat);
 578                         return -1;
 579                 }
 580         }
 581         if (p) {
 582                 ast_mutex_lock(&p->lock);
 583                 if (p->rtp) {
 584                         res =  ast_rtp_write(p->rtp, frame);
 585                 }
 586                 ast_mutex_unlock(&p->lock);
 587         }
 588         return res;
 589 }
 590
 591 /** FIXME: Can I acutally use this or does Open H.323 take care of everything? */
 592 static int oh323_indicate(struct ast_channel *c, int condition)
 593 {
 594
 595         struct oh323_pvt *p = c->pvt->pvt;
 596
 597         switch(condition) {
 598         case AST_CONTROL_RINGING:
 599                 if (c->_state == AST_STATE_RING) {
 600                 //      transmit_response(p, "180 Ringing", &p->initreq);
 601                         break;
 602                 }
 603                 return 0;
 604         case AST_CONTROL_BUSY:
 605                 if (c->_state != AST_STATE_UP) {
 606                 //      transmit_response(p, "600 Busy everywhere", &p->initreq);
 607                         p->alreadygone = 1;
 608                         ast_softhangup(c, AST_SOFTHANGUP_DEV);
 609                         break;
 610                 }
 611                 return 0;
 612         case AST_CONTROL_CONGESTION:
 613                 if (c->_state != AST_STATE_UP) {
 614                 //      transmit_response(p, "486 Busy here", &p->initreq);
 615                         p->alreadygone = 1;
 616                         ast_softhangup(c, AST_SOFTHANGUP_DEV);
 617                         break;
 618                 }
 619                 return 0;
 620         case -1:
 621                 return -1;
 622         default:
 623                 ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", condition);
 624                 return -1;
 625         }
 626         return 0;
 627 }
 628
 629 // FIXME: WTF is this? Do I need this???
 630 static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
 631 {
 632         struct oh323_pvt *p = newchan->pvt->pvt;
 633
 634         ast_mutex_lock(&p->lock);
 635         if (p->owner != oldchan) {
 636                 ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, p->owner);
 637                 return -1;
 638         }
 639         p->owner = newchan;
 640         ast_mutex_unlock(&p->lock);
 641         return 0;
 642 }
 643
 644 static struct ast_channel *oh323_new(struct oh323_pvt *i, int state, const char *host)
 645 {
 646         struct ast_channel *ch;
 647         int fmt;
 648         ch = ast_channel_alloc(1);
 649
 650         if (ch) {
 651
 652                 snprintf(ch->name, sizeof(ch->name)-1, "H323/%s", host);
 653                 ch->nativeformats = i->capability;
 654                 if (!ch->nativeformats)
 655                         ch->nativeformats = capability;
 656                 fmt = ast_best_codec(ch->nativeformats);
 657                 ch->type = type;
 658                 ch->fds[0] = ast_rtp_fd(i->rtp);
 659
 660                 if (state == AST_STATE_RING)
 661                         ch->rings = 1;
 662
 663                 ch->writeformat = fmt;
 664                 ch->pvt->rawwriteformat = fmt;
 665                 ch->readformat = fmt;
 666                 ch->pvt->rawreadformat = fmt;
 667
 668                 /* Allocate dsp for in-band DTMF support */
 669                 if (i->dtmfmode & H323_DTMF_INBAND) {
 670                         i->vad = ast_dsp_new();
 671                         ast_dsp_set_features(i->vad, DSP_FEATURE_DTMF_DETECT);
 672                 }
 673
 674                 /* Register the OpenH323 channel's functions. */
 675                 ch->pvt->pvt = i;
 676                 ch->pvt->send_digit = oh323_digit;
 677                 ch->pvt->call = oh323_call;
 678                 ch->pvt->hangup = oh323_hangup;
 679                 ch->pvt->answer = oh323_answer;
 680                 ch->pvt->read = oh323_read;
 681                 ch->pvt->write = oh323_write;
 682                 ch->pvt->indicate = oh323_indicate;
 683                 ch->pvt->fixup = oh323_fixup;
 684 //              ch->pvt->bridge = ast_rtp_bridge;
 685
 686                 /*  Set the owner of this channel */
 687                 i->owner = ch;
 688
 689                 ast_mutex_lock(&usecnt_lock);
 690                 usecnt++;
 691                 ast_mutex_unlock(&usecnt_lock);
 692                 ast_update_use_count();
 693                 strncpy(ch->context, i->context, sizeof(ch->context)-1);
 694                 strncpy(ch->exten, i->exten, sizeof(ch->exten)-1);
 695                 ch->priority = 1;
 696                 if (strlen(i->callerid))
 697                         ch->callerid = strdup(i->callerid);
 698                 if (strlen(i->accountcode))
 699                         strncpy(ch->accountcode, i->accountcode, sizeof(ch->accountcode)-1);
 700                 if (i->amaflags)
 701                         ch->amaflags = i->amaflags;
 702                 ast_setstate(ch, state);
 703                 if (state != AST_STATE_DOWN) {
 704                         if (ast_pbx_start(ch)) {
 705                                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", ch->name);
 706                                 ast_hangup(ch);
 707                                 ch = NULL;
 708                         }
 709                 }
 710         } else
 711                 ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
 712         return ch;
 713 }
 714
 715 static struct oh323_pvt *oh323_alloc(int callid)
 716 {
 717         struct oh323_pvt *p;
 718
 719         p = malloc(sizeof(struct oh323_pvt));
 720         if (!p) {
 721                 ast_log(LOG_ERROR, "Couldn't allocate private structure. This is bad\n");
 722                 return NULL;
 723         }
 724
 725         /* Keep track of stuff */
 726         memset(p, 0, sizeof(struct oh323_pvt));
 727         p->rtp = ast_rtp_new(sched, io, 1, 0);
 728
 729         if (!p->rtp) {
 730                 ast_log(LOG_WARNING, "Unable to create RTP session: %s\n", strerror(errno));
 731                 free(p);
 732                 return NULL;
 733         }
 734         ast_rtp_settos(p->rtp, tos);
 735         ast_mutex_init(&p->lock);
 736
 737         p->cd.call_reference = callid;
 738         p->bridge = bridge_default;
 739
 740         p->dtmfmode = dtmfmode;
 741         if (p->dtmfmode & H323_DTMF_RFC2833)
 742                 p->nonCodecCapability |= AST_RTP_DTMF;
 743
 744         /* Add to interface list */
 745         ast_mutex_lock(&iflock);
 746         p->next = iflist;
 747         iflist = p;
 748         ast_mutex_unlock(&iflock);
 749         return p;
 750 }
 751
 752 static struct oh323_pvt *find_call(int call_reference)
 753 {
 754         struct oh323_pvt *p;
 755
 756                 ast_mutex_lock(&iflock);
 757         p = iflist;
 758
 759         while(p) {
 760                 if (p->cd.call_reference == call_reference) {
 761                         /* Found the call */
 762                                                 ast_mutex_unlock(&iflock);
 763                                                 return p;
 764                 }
 765                 p = p->next;
 766         }
 767         ast_mutex_unlock(&iflock);
 768                 return NULL;
 769
 770 }
 771
 772 static struct ast_channel *oh323_request(char *type, int format, void *data)
 773 {
 774
 775         int oldformat;
 776         struct oh323_pvt *p;
 777         struct ast_channel *tmpc = NULL;
 778         char *dest = data;
 779         char *ext, *host;
 780         char *h323id = NULL;
 781         char tmp[256];
 782
 783
 784         ast_log(LOG_DEBUG, "type=%s, format=%d, data=%s.\n", type, format, (char *)data);
 785
 786         oldformat = format;
 787         format &= capability;
 788         if (!format) {
 789                 ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", format);
 790                 return NULL;
 791         }
 792
 793         strncpy(tmp, dest, sizeof(tmp) - 1);
 794
 795         host = strchr(tmp, '@');
 796         if (host) {
 797                 *host = '\0';
 798                 host++;
 799                 ext = tmp;
 800         } else {
 801                 host = tmp;
 802                 ext = NULL;
 803         }
 804
 805         strtok_r(host, "/", &(h323id));
 806
 807         if (*h323id) {
 808                 h323_set_id(h323id);
 809         }
 810
 811         p = oh323_alloc(0);
 812
 813         if (!p) {
 814                 ast_log(LOG_WARNING, "Unable to build pvt data for '%s'\n", (char *)data);
 815                 return NULL;
 816         }
 817
 818         /* Assign a default capability */
 819         p->capability = capability;
 820
 821         if (p->dtmfmode) {
 822                 if (p->dtmfmode & H323_DTMF_RFC2833)
 823                         p->nonCodecCapability |= AST_RTP_DTMF;
 824                 else
 825                         p->nonCodecCapability &= ~AST_RTP_DTMF;
 826         }
 827         /* pass on our preferred codec to the H.323 stack */
 828         h323_set_capability(format, dtmfmode);
 829
 830         if (ext) {
 831                 strncpy(p->username, ext, sizeof(p->username) - 1);
 832         }
 833         ast_log(LOG_DEBUG, "Host: %s\tUsername: %s\n", host, p->username);
 834
 835         tmpc = oh323_new(p, AST_STATE_DOWN, host);
 836         if (!tmpc)
 837                 oh323_destroy(p);
 838
 839         restart_monitor();
 840
 841         return tmpc;
 842 }
 843
 844 struct oh323_alias *find_alias(const char *source_aliases)
 845 {
 846         struct oh323_alias *a;
 847
 848         a = aliasl.aliases;
 849
 850         while(a) {
 851
 852                 if (!strcasecmp(a->name, source_aliases)) {
 853                         break;
 854                 }
 855                 a = a->next;
 856         }
 857         return a;
 858 }
 859
 860 struct oh323_user *find_user(const call_details_t cd)
 861 {
 862         struct oh323_user *u;
 863
 864         u = userl.users;
 865         if(userbyalias == 1){
 866                 while(u) {
 867                         if (!strcasecmp(u->name, cd.call_source_aliases)) {
 868                                 break;
 869                         }
 870                         u = u->next;
 871                 }
 872
 873         } else {
 874                 while(u) {
 875                         if (!strcasecmp(cd.sourceIp, inet_ntoa(u->addr.sin_addr))) {
 876                                 break;
 877                         }
 878                         u = u->next;
 879                 }
 880
 881
 882         }
 883         return u;
 884
 885 }
 886
 887 struct oh323_peer *find_peer(char *dest_peer)
 888 {
 889         struct oh323_peer *p;
 890
 891         p = peerl.peers;
 892
 893         while(p) {
 894                 if (!strcasecmp(p->name, dest_peer)) {
 895                         break;
 896                 }
 897                 p = p->next;
 898         }
 899         return p;
 900
 901 }
 902
 903 /**
 904   * Callback for sending digits from H.323 up to asterisk
 905   *
 906   */
 907 int send_digit(unsigned call_reference, char digit)
 908 {
 909         struct oh323_pvt *p;
 910         struct ast_frame f;
 911
 912         ast_log(LOG_DEBUG, "Recieved Digit: %c\n", digit);
 913         p = find_call(call_reference);
 914
 915         if (!p) {
 916                 ast_log(LOG_ERROR, "Private structure not found in send_digit.\n");
 917                 return -1;
 918         }
 919         memset(&f, 0, sizeof(f));
 920         f.frametype = AST_FRAME_DTMF;
 921     f.subclass = digit;
 922     f.datalen = 0;
 923     f.samples = 800;
 924     f.offset = 0;
 925     f.data = NULL;
 926     f.mallocd = 0;
 927     f.src = "SEND_DIGIT";
 928
 929         return ast_queue_frame(p->owner, &f);
 930 }
 931
 932 /**
 933   * Call-back function that gets called when any H.323 connection is made
 934   *
 935   * Returns the local RTP information
 936   */
 937 struct rtp_info *create_connection(unsigned call_reference)
 938 {
 939         struct oh323_pvt *p;
 940         struct sockaddr_in us;
 941         struct sockaddr_in them;
 942         struct rtp_info *info;
 943
 944         info = malloc(sizeof(struct rtp_info));
 945
 946         p = find_call(call_reference);
 947
 948         if (!p) {
 949                 ast_log(LOG_ERROR, "Unable to allocate private structure, this is very bad.\n");
 950                 return NULL;
 951         }
 952
 953         /* figure out our local RTP port and tell the H.323 stack about it*/
 954         ast_rtp_get_us(p->rtp, &us);
 955         ast_rtp_get_peer(p->rtp, &them);
 956
 957
 958         info->addr = inet_ntoa(us.sin_addr);
 959         info->port = ntohs(us.sin_port);
 960
 961
 962         return info;
 963 }
 964
 965 /**
 966  *  Call-back function for incoming calls
 967  *
 968  *  Returns 1 on success
 969  */
 970
 971 int setup_incoming_call(call_details_t cd)
 972 {
 973
 974         struct oh323_pvt *p = NULL;
 975         struct ast_channel *c = NULL;
 976         struct oh323_user *user = NULL;
 977         struct oh323_alias *alias = NULL;
 978
 979         /* allocate the call*/
 980         p = oh323_alloc(cd.call_reference);
 981
 982         if (!p) {
 983                 ast_log(LOG_ERROR, "Unable to allocate private structure, this is bad.\n");
 984                 return 0;
 985         }
 986
 987         /* Populate the call details in the private structure */
 988         p->cd.call_token = cd.call_token;
 989         p->cd.call_source_aliases = cd.call_source_aliases;
 990         p->cd.call_dest_alias = cd.call_dest_alias;
 991         p->cd.call_source_e164 = cd.call_source_e164;
 992         p->cd.call_dest_e164 = cd.call_dest_e164;
 993
 994         if (h323debug) {
 995                 ast_verbose(VERBOSE_PREFIX_3 "Setting up Call\n");
 996                 ast_verbose(VERBOSE_PREFIX_3 "     Call token:  [%s]\n", p->cd.call_token);
 997                 ast_verbose(VERBOSE_PREFIX_3 "     Calling party name:  [%s]\n", p->cd.call_source_aliases);
 998                 ast_verbose(VERBOSE_PREFIX_3 "     Calling party number:  [%s]\n", p->cd.call_source_e164);
 999                 ast_verbose(VERBOSE_PREFIX_3 "     Called  party name:  [%s]\n", p->cd.call_dest_alias);
1000                 ast_verbose(VERBOSE_PREFIX_3 "     Called  party number:  [%s]\n", p->cd.call_dest_e164);
1001         }
1002
1003         /* Decide if we are allowing Gatekeeper routed calls*/
1004         if ((!strcasecmp(cd.sourceIp, gatekeeper)) && (gkroute == -1) && (usingGk == 1)) {
1005
1006                 if (strlen(cd.call_dest_e164)) {
1007                         strncpy(p->exten, cd.call_dest_e164, sizeof(p->exten)-1);
1008                         strncpy(p->context, default_context, sizeof(p->context)-1);
1009                 } else {
1010                         alias = find_alias(cd.call_dest_alias);
1011
1012                         if (!alias) {
1013                                 ast_log(LOG_ERROR, "Call for %s rejected, alias not found\n", cd.call_dest_alias);
1014                                 return 0;
1015                         }
1016                         strncpy(p->exten, alias->name, sizeof(p->exten)-1);
1017                         strncpy(p->context, alias->context, sizeof(p->context)-1);
1018                 }
1019
1020
1021                 sprintf(p->callerid, "%s <%s>", p->cd.call_source_aliases, p->cd.call_source_e164);
1022
1023         } else {
1024                 /* Either this call is not from the Gatekeeper
1025                    or we are not allowing gk routed calls */
1026
1027
1028                 user  = find_user(cd);
1029
1030
1031                 if (!user) {
1032                         sprintf(p->callerid, "%s <%s>", p->cd.call_source_aliases, p->cd.call_source_e164);
1033                         if (strlen(p->cd.call_dest_e164)) {
1034                                 strncpy(p->exten, cd.call_dest_e164, sizeof(p->exten)-1);
1035                         } else {
1036                                 strncpy(p->exten, cd.call_dest_alias, sizeof(p->exten)-1);
1037                         }
1038                         if (!strlen(default_context)) {
1039                                 ast_log(LOG_ERROR, "Call from user '%s' rejected due to no default context\n", p->cd.call_source_aliases);
1040                                 return 0;
1041                         }
1042                         strncpy(p->context, default_context, sizeof(p->context)-1);
1043                         ast_log(LOG_DEBUG, "Sending %s to context [%s]\n", cd.call_source_aliases, p->context);
1044                 } else {
1045                         if (user->host) {
1046                                 if (strcasecmp(cd.sourceIp, inet_ntoa(user->addr.sin_addr))){
1047
1048                                         if(!strlen(default_context)) {
1049                                                 ast_log(LOG_ERROR, "Call from user '%s' rejected due to non-matching IP address of '%s'\n", user->name, cd.sourceIp);
1050                                                 return 0;
1051                                         }
1052
1053                                         strncpy(p->context, default_context, sizeof(p->context)-1);
1054                                         sprintf(p->exten,"i");
1055
1056                                         goto exit;
1057                                 }
1058                         }
1059                         if (user->incominglimit > 0) {
1060                                 if (user->inUse >= user->incominglimit) {
1061                                         ast_log(LOG_ERROR, "Call from user '%s' rejected due to usage limit of %d\n", user->name, user->incominglimit);
1062                                         return 0;
1063                                 }
1064                         }
1065                         strncpy(p->context, user->context, sizeof(p->context)-1);
1066                         p->bridge = user->bridge;
1067                       p->nat = user->nat;
1068
1069                         if (strlen(user->callerid))
1070                                 strncpy(p->callerid, user->callerid, sizeof(p->callerid) - 1);
1071                         else
1072                                 sprintf(p->callerid, "%s <%s>", p->cd.call_source_aliases, p->cd.call_source_e164);
1073
1074                         if (strlen(p->cd.call_dest_e164)) {
1075                                 strncpy(p->exten, cd.call_dest_e164, sizeof(p->exten)-1);
1076                         } else {
1077                                 strncpy(p->exten, cd.call_dest_alias, sizeof(p->exten)-1);
1078                         }
1079                         if (strlen(user->accountcode)) {
1080                                 strncpy(p->accountcode, user->accountcode, sizeof(p->accountcode)-1);
1081                         }
1082
1083                         /* Increment the usage counter */
1084                         user->inUse++;
1085                 }
1086         }
1087
1088 /* I know this is horrid, don't kill me saddam */
1089 exit:
1090         /* allocate a channel and tell asterisk about it */
1091         c = oh323_new(p, AST_STATE_RINGING, cd.call_token);
1092         if (!c) {
1093                 ast_log(LOG_ERROR, "Couldn't create channel. This is bad\n");
1094                 return 0;
1095         }
1096
1097         return 1;
1098 }
1099
1100 /**
1101  * Call-back function to establish an outgoing H.323 call
1102  *
1103  * Returns 1 on success
1104  */
1105 int setup_outgoing_call(call_details_t cd)
1106 {
1107         return 1;
1108 }
1109
1110 #if 0
1111 if (p->inUse >= p->outgoinglimit) {
1112         ast_log(LOG_ERROR, "Call to %s rejected due to usage limit of %d outgoing channels\n", p->name, p->inUse);
1113         return 0;
1114 }
1115
1116 if (!p) {
1117         ast_log(LOG_ERROR, "Rejecting call: peer %s not found\n", dest_peer);
1118         return 0;
1119 }
1120 #endif
1121
1122 /**
1123   * Call-back function that gets called for each rtp channel opened
1124   *
1125   * Returns nothing
1126   */
1127 void setup_rtp_connection(unsigned call_reference, const char *remoteIp, int remotePort)
1128 {
1129         struct oh323_pvt *p = NULL;
1130         struct sockaddr_in them;
1131
1132         /* Find the call or allocate a private structure if call not found */
1133         p = find_call(call_reference);
1134
1135         if (!p) {
1136                 ast_log(LOG_ERROR, "Something is wrong: rtp\n");
1137                 return;
1138         }
1139
1140         them.sin_family = AF_INET;
1141         them.sin_addr.s_addr = inet_addr(remoteIp); // only works for IPv4
1142         them.sin_port = htons(remotePort);
1143         ast_rtp_set_peer(p->rtp, &them);
1144
1145         return;
1146 }
1147
1148 /**
1149   *     Call-back function to signal asterisk that the channel has been answered
1150   * Returns nothing
1151   */
1152 void connection_made(unsigned call_reference)
1153 {
1154         struct ast_channel *c = NULL;
1155         struct oh323_pvt *p = NULL;
1156
1157         p = find_call(call_reference);
1158
1159         if (!p)
1160                 ast_log(LOG_ERROR, "Something is wrong: connection\n");
1161
1162
1163         if (!p->owner) {
1164                 ast_log(LOG_ERROR, "Channel has no owner\n");
1165                 return;
1166         }
1167         c = p->owner;
1168
1169         ast_setstate(c, AST_STATE_UP);
1170         return;
1171 }
1172
1173 /**
1174   * Call-back function to cleanup communication
1175   * Returns nothing,
1176   */
1177 void cleanup_connection(call_details_t cd)
1178 {
1179         struct oh323_pvt *p = NULL;
1180 //      struct oh323_peer *peer = NULL;
1181         struct oh323_user *user = NULL;
1182         struct ast_rtp *rtp = NULL;
1183
1184         ast_log(LOG_DEBUG, "Cleaning up our mess\n");
1185
1186         p = find_call(cd.call_reference);
1187
1188         if (!p) {
1189                 return;
1190         }
1191
1192         /* Decrement usage counter */
1193         if (!p->outgoing) {
1194                 user = find_user(cd);
1195
1196                 if(user)
1197                         user->inUse--;
1198         }
1199
1200 #if 0
1201                 if (p->outgoing) {
1202                 peer = find_peer(cd.call_dest_alias);
1203                 peer->inUse--;
1204         } else {
1205                 user = find_user(cd);
1206                 user->inUse--;
1207         }
1208 #endif
1209
1210         if (p->rtp) {
1211                 rtp = p->rtp;
1212                 p->rtp = NULL;
1213                 /* Immediately stop RTP */
1214                 ast_rtp_destroy(rtp);
1215         }
1216
1217         p->alreadygone = 1;
1218
1219         /* Send hangup */
1220         if (p->owner)
1221                 ast_queue_hangup(p->owner);
1222
1223         p = NULL;
1224         return;
1225 }
1226
1227 static void *do_monitor(void *data)
1228 {
1229         int res;
1230         struct oh323_pvt *oh323 = NULL;
1231
1232                 for(;;) {
1233                 /* Check for interfaces needing to be killed */
1234                 ast_mutex_lock(&iflock);
1235 restartsearch:
1236                 oh323 = iflist;
1237                 while(oh323) {
1238                         if (oh323->needdestroy) {
1239                                 __oh323_destroy(oh323);
1240                                 goto restartsearch;
1241                         }
1242                         oh323 = oh323->next;
1243                 }
1244                 ast_mutex_unlock(&iflock);
1245
1246                 /* Wait for sched or io */
1247                 res = ast_sched_wait(sched);
1248                 if ((res < 0) || (res > 1000))
1249                         res = 1000;
1250                 res = ast_io_wait(io, res);
1251
1252                 pthread_testcancel();
1253
1254                 ast_mutex_lock(&monlock);
1255                 if (res >= 0)
1256                         ast_sched_runq(sched);
1257                 ast_mutex_unlock(&monlock);
1258         }
1259         /* Never reached */
1260         return NULL;
1261
1262 }
1263
1264 static int restart_monitor(void)
1265 {
1266         /* If we're supposed to be stopped -- stay stopped */
1267         if (monitor_thread == AST_PTHREADT_STOP)
1268                 return 0;
1269         if (ast_mutex_lock(&monlock)) {
1270                 ast_log(LOG_WARNING, "Unable to lock monitor\n");
1271                 return -1;
1272         }
1273         if (monitor_thread == pthread_self()) {
1274                 ast_mutex_unlock(&monlock);
1275                 ast_log(LOG_WARNING, "Cannot kill myself\n");
1276                 return -1;
1277         }
1278         if (monitor_thread && (monitor_thread != AST_PTHREADT_NULL)) {
1279                 /* Wake up the thread */
1280                 pthread_kill(monitor_thread, SIGURG);
1281         } else {
1282                 /* Start a new monitor */
1283                 if (pthread_create(&monitor_thread, NULL, do_monitor, NULL) < 0) {
1284                         ast_mutex_unlock(&monlock);
1285                         ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
1286                         return -1;
1287                 }
1288         }
1289         ast_mutex_unlock(&monlock);
1290         return 0;
1291 }
1292
1293 static int h323_do_trace(int fd, int argc, char *argv[])
1294 {
1295         if (argc != 3) {
1296                 return RESULT_SHOWUSAGE;
1297         }
1298         h323_debug(1, atoi(argv[2]));
1299         ast_cli(fd, "H.323 trace set to level %s\n", argv[2]);
1300         return RESULT_SUCCESS;
1301 }
1302
1303 static int h323_no_trace(int fd, int argc, char *argv[])
1304 {
1305         if (argc != 3) {
1306                 return RESULT_SHOWUSAGE;
1307         }
1308         h323_debug(0,0);
1309         ast_cli(fd, "H.323 trace disabled\n");
1310         return RESULT_SUCCESS;
1311 }
1312
1313 static int h323_do_debug(int fd, int argc, char *argv[])
1314 {
1315         if (argc != 2) {
1316                 return RESULT_SHOWUSAGE;
1317         }
1318         h323debug = 1;
1319         ast_cli(fd, "H323 debug enabled\n");
1320         return RESULT_SUCCESS;
1321 }
1322
1323 static int h323_no_debug(int fd, int argc, char *argv[])
1324 {
1325         if (argc != 3) {
1326                 return RESULT_SHOWUSAGE;
1327         }
1328         h323debug = 0;
1329         ast_cli(fd, "H323 Debug disabled\n");
1330         return RESULT_SUCCESS;
1331 }
1332
1333 static int h323_gk_cycle(int fd, int argc, char *argv[])
1334 {
1335         return RESULT_SUCCESS;
1336 #if 0
1337         if (argc != 3) {
1338                 return RESULT_SHOWUSAGE;
1339         }
1340         h323_gk_urq();
1341
1342         /* Possibly register with a GK */
1343         if (!gatekeeper_disable) {
1344                 if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
1345                         ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
1346                 }
1347         }
1348         return RESULT_SUCCESS;
1349 #endif
1350 }
1351
1352 static int h323_ep_hangup(int fd, int argc, char *argv[])
1353 {
1354
1355         if (argc != 3) {
1356                 return RESULT_SHOWUSAGE;
1357         }
1358
1359         if (h323_soft_hangup(argv[2])) {
1360                 ast_verbose(VERBOSE_PREFIX_3 "Hangup succeeded on %s\n", argv[2]);
1361         } else {
1362                 ast_verbose(VERBOSE_PREFIX_3 "Hangup failed for %s\n", argv[2]);
1363         }
1364
1365         return RESULT_SUCCESS;
1366 }
1367
1368 static int h323_tokens_show(int fd, int argc, char *argv[])
1369 {
1370
1371         if (argc != 3) {
1372                 return RESULT_SHOWUSAGE;
1373         }
1374         h323_show_tokens();
1375
1376         return RESULT_SUCCESS;
1377 }
1378
1379
1380 static char trace_usage[] =
1381 "Usage: h.323 trace <level num>\n"
1382 "       Enables H.323 stack tracing for debugging purposes\n";
1383
1384 static char no_trace_usage[] =
1385 "Usage: h.323 no trace\n"
1386 "       Disables H.323 stack tracing for debugging purposes\n";
1387
1388 static char debug_usage[] =
1389 "Usage: h.323 debug\n"
1390 "       Enables chan_h323 debug output\n";
1391
1392 static char no_debug_usage[] =
1393 "Usage: h.323 no debug\n"
1394 "       Disables chan_h323 debug output\n";
1395
1396 static char show_codec_usage[] =
1397 "Usage: h.323 show codec\n"
1398 "       Shows all enabled codecs\n";
1399
1400 static char show_cycle_usage[] =
1401 "Usage: h.323 gk cycle\n"
1402 "       Manually re-register with the Gatekeper\n";
1403
1404 static char show_hangup_usage[] =
1405 "Usage: h.323 hangup <token>\n"
1406 "       Manually try to hang up call identified by <token>\n";
1407
1408 static char show_tokens_usage[] =
1409 "Usage: h.323 show tokens\n"
1410 "       Print out all active call tokens\n";
1411
1412 static struct ast_cli_entry  cli_trace =
1413         { { "h.323", "trace", NULL }, h323_do_trace, "Enable H.323 Stack Tracing", trace_usage };
1414 static struct ast_cli_entry  cli_no_trace =
1415         { { "h.323", "no", "trace", NULL }, h323_no_trace, "Disable H.323 Stack Tracing", no_trace_usage };
1416 static struct ast_cli_entry  cli_debug =
1417         { { "h.323", "debug", NULL }, h323_do_debug, "Enable chan_h323 debug", debug_usage };
1418 static struct ast_cli_entry  cli_no_debug =
1419         { { "h.323", "no", "debug", NULL }, h323_no_debug, "Disable chan_h323 debug", no_debug_usage };
1420 static struct ast_cli_entry  cli_show_codecs =
1421         { { "h.323", "show", "codecs", NULL }, h323_show_codec, "Show enabled codecs", show_codec_usage };
1422 static struct ast_cli_entry  cli_gk_cycle =
1423         { { "h.323", "gk", "cycle", NULL }, h323_gk_cycle, "Manually re-register with the Gatekeper", show_cycle_usage };
1424 static struct ast_cli_entry  cli_hangup_call =
1425         { { "h.323", "hangup", NULL }, h323_ep_hangup, "Manually try to hang up a call", show_hangup_usage };
1426 static struct ast_cli_entry  cli_show_tokens =
1427         { { "h.323", "show", "tokens", NULL }, h323_tokens_show, "Manually try to hang up a call", show_tokens_usage };
1428
1429
1430
1431 int reload_config(void)
1432 {
1433
1434         int format;
1435         struct ast_config *cfg;
1436         struct ast_variable *v;
1437         struct oh323_peer *peer   = NULL;
1438         struct oh323_user *user   = NULL;
1439         struct oh323_alias *alias = NULL;
1440         struct ast_hostent ahp; struct hostent *hp;
1441         char *cat;
1442         char *utype;
1443
1444         cfg = ast_load(config);
1445
1446         /* We *must* have a config file otherwise stop immediately */
1447         if (!cfg) {
1448                 ast_log(LOG_NOTICE, "Unable to load config %s, H.323 disabled\n", config);
1449                 return 1;
1450         }
1451
1452        /* fire up the H.323 Endpoint */
1453         if (!h323_end_point_exist()) {
1454                h323_end_point_create();
1455         }
1456         h323debug=0;
1457         dtmfmode = H323_DTMF_RFC2833;
1458
1459         memset(&bindaddr, 0, sizeof(bindaddr));
1460
1461         v = ast_variable_browse(cfg, "general");
1462         while(v) {
1463                 /* Create the interface list */
1464                 if (!strcasecmp(v->name, "port")) {
1465                         port = (int)strtol(v->value, NULL, 10);
1466                 } else if (!strcasecmp(v->name, "bindaddr")) {
1467                         if (!(hp = ast_gethostbyname(v->value, &ahp))) {
1468                                 ast_log(LOG_WARNING, "Invalid address: %s\n", v->value);
1469                         } else {
1470                                 memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
1471                         }
1472                 } else if (!strcasecmp(v->name, "allow")) {
1473                         format = ast_getformatbyname(v->value);
1474                         if (format < 1)
1475                                 ast_log(LOG_WARNING, "Cannot allow unknown format '%s'\n", v->value);
1476                         else
1477                                 capability |= format;
1478                 } else if (!strcasecmp(v->name, "disallow")) {
1479                         format = ast_getformatbyname(v->value);
1480                         if (format < 1)
1481                                 ast_log(LOG_WARNING, "Cannot disallow unknown format '%s'\n", v->value);
1482                         else
1483                                 capability &= ~format;
1484                 } else if (!strcasecmp(v->name, "tos")) {
1485                         if (sscanf(v->value, "%i", &format) == 1)
1486                                 tos = format & 0xff;
1487                         else if (!strcasecmp(v->value, "lowdelay"))
1488                                 tos = IPTOS_LOWDELAY;
1489                         else if (!strcasecmp(v->value, "throughput"))
1490                                 tos = IPTOS_THROUGHPUT;
1491                         else if (!strcasecmp(v->value, "reliability"))
1492                                 tos = IPTOS_RELIABILITY;
1493                         else if (!strcasecmp(v->value, "mincost"))
1494                                 tos = IPTOS_MINCOST;
1495                         else if (!strcasecmp(v->value, "none"))
1496                                 tos = 0;
1497                         else
1498                                 ast_log(LOG_WARNING, "Invalid tos value at line %d, should be 'lowdelay', 'throughput', 'reliability', 'mincost', or 'none'\n", v->lineno);
1499                 } else if (!strcasecmp(v->name, "gatekeeper")) {
1500                         if (!strcasecmp(v->value, "DISABLE")) {
1501                                 gatekeeper_disable = 1;
1502                                 usingGk = 0;
1503                         } else if (!strcasecmp(v->value, "DISCOVER")) {
1504                                 gatekeeper_disable = 0;
1505                                 gatekeeper_discover = 1;
1506                                 usingGk = 1;
1507                         } else {
1508                                 gatekeeper_disable = 0;
1509                                 usingGk = 1;
1510                                 strncpy(gatekeeper, v->value, sizeof(gatekeeper)-1);
1511                         }
1512                 } else if (!strcasecmp(v->name, "secret")) {
1513                                 strncpy(secret, v->value, sizeof(secret)-1);
1514                 } else if (!strcasecmp(v->name, "AllowGKRouted")) {
1515                                 gkroute = ast_true(v->value);
1516                 } else if (!strcasecmp(v->name, "context")) {
1517                         strncpy(default_context, v->value, sizeof(default_context)-1);
1518                         ast_verbose(VERBOSE_PREFIX_3 "  == Setting default context to %s\n", default_context);
1519                 } else if (!strcasecmp(v->name, "dtmfmode")) {
1520                         if (!strcasecmp(v->value, "inband"))
1521                                 dtmfmode=H323_DTMF_INBAND;
1522                         else if (!strcasecmp(v->value, "rfc2833"))
1523                                 dtmfmode = H323_DTMF_RFC2833;
1524                         else {
1525                                 ast_log(LOG_WARNING, "Unknown dtmf mode '%s', using rfc2833\n", v->value);
1526                                 dtmfmode = H323_DTMF_RFC2833;
1527                         }
1528                 } else if (!strcasecmp(v->name, "UserByAlias")) {
1529                         userbyalias = ast_true(v->value);
1530                 } else if (!strcasecmp(v->name, "bridge")) {
1531                         bridge_default = ast_true(v->value);
1532                 }
1533                 v = v->next;
1534         }
1535
1536         cat = ast_category_browse(cfg, NULL);
1537         while(cat) {
1538                 if (strcasecmp(cat, "general")) {
1539                         utype = ast_variable_retrieve(cfg, cat, "type");
1540                         if (utype) {
1541                                 if (!strcasecmp(utype, "user") || !strcasecmp(utype, "friend")) {
1542                                         user = build_user(cat, ast_variable_browse(cfg, cat));
1543                                         if (user) {
1544                                                 ast_mutex_lock(&userl.lock);
1545                                                 user->next = userl.users;
1546                                                 userl.users = user;
1547                                                 ast_mutex_unlock(&userl.lock);
1548                                         }
1549                                 }  else if (!strcasecmp(utype, "peer") || !strcasecmp(utype, "friend")) {
1550                                         peer = build_peer(cat, ast_variable_browse(cfg, cat));
1551                                         if (peer) {
1552                                                 ast_mutex_lock(&peerl.lock);
1553                                                 peer->next = peerl.peers;
1554                                                 peerl.peers = peer;
1555                                                 ast_mutex_unlock(&peerl.lock);
1556                                         }
1557                                 }  else if (!strcasecmp(utype, "h323")) {
1558                                         alias = build_alias(cat, ast_variable_browse(cfg, cat));
1559                                         if (alias) {
1560                                                 ast_mutex_lock(&aliasl.lock);
1561                                                 alias->next = aliasl.aliases;
1562                                                 aliasl.aliases = alias;
1563                                                 ast_mutex_unlock(&aliasl.lock);
1564                                         }
1565                                 } else {
1566                                         ast_log(LOG_WARNING, "Unknown type '%s' for '%s' in %s\n", utype, cat, config);
1567                                 }
1568                         } else
1569                                 ast_log(LOG_WARNING, "Section '%s' lacks type\n", cat);
1570                 }
1571                 cat = ast_category_browse(cfg, cat);
1572         }
1573
1574         /* Register our H.323 aliases if any*/
1575         while (alias) {
1576                 if (h323_set_alias(alias)) {
1577                         ast_log(LOG_ERROR, "Alias %s rejected by endpoint\n", alias->name);
1578                         return -1;
1579                 }
1580                 alias = alias->next;
1581         }
1582
1583         /* Add some capabilities */
1584         if(h323_set_capability(capability, dtmfmode)) {
1585                 ast_log(LOG_ERROR, "Capabilities failure, this is bad.\n");
1586                 return -1;
1587         }
1588         ast_destroy(cfg);
1589
1590         return 0;
1591 }
1592
1593 void delete_users(void)
1594 {
1595         struct oh323_user *user, *userlast;
1596         struct oh323_peer *peer;
1597
1598         /* Delete all users */
1599         ast_mutex_lock(&userl.lock);
1600         for (user=userl.users;user;) {
1601                 userlast = user;
1602                 user=user->next;
1603                 free(userlast);
1604         }
1605         userl.users=NULL;
1606         ast_mutex_unlock(&userl.lock);
1607         ast_mutex_lock(&peerl.lock);
1608         for (peer=peerl.peers;peer;) {
1609                 /* Assume all will be deleted, and we'll find out for sure later */
1610                 peer->delme = 1;
1611                 peer = peer->next;
1612         }
1613         ast_mutex_unlock(&peerl.lock);
1614 }
1615
1616 void delete_aliases(void)
1617 {
1618         struct oh323_alias *alias, *aliaslast;
1619
1620         /* Delete all users */
1621         ast_mutex_lock(&aliasl.lock);
1622         for (alias=aliasl.aliases;alias;) {
1623                 aliaslast = alias;
1624                 alias=alias->next;
1625                 free(aliaslast);
1626         }
1627         aliasl.aliases=NULL;
1628         ast_mutex_unlock(&aliasl.lock);
1629 }
1630
1631 void prune_peers(void)
1632 {
1633         /* Prune peers who still are supposed to be deleted */
1634         struct oh323_peer *peer, *peerlast, *peernext;
1635         ast_mutex_lock(&peerl.lock);
1636         peerlast = NULL;
1637         for (peer=peerl.peers;peer;) {
1638                 peernext = peer->next;
1639                 if (peer->delme) {
1640                         free(peer);
1641                         if (peerlast)
1642                                 peerlast->next = peernext;
1643                         else
1644                                 peerl.peers = peernext;
1645                 } else
1646                         peerlast = peer;
1647                 peer=peernext;
1648         }
1649         ast_mutex_unlock(&peerl.lock);
1650 }
1651
1652 int reload(void)
1653 {
1654         delete_users();
1655         delete_aliases();
1656         prune_peers();
1657
1658 #if 0
1659         if (strlen(gatekeeper)) {
1660                 h323_gk_urq();
1661         }
1662 #endif
1663
1664         reload_config();
1665
1666 #if 0
1667         /* Possibly register with a GK */
1668         if (gatekeeper_disable == 0) {
1669                 if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
1670                         ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
1671                         h323_end_process();
1672                         return -1;
1673                 }
1674         }
1675 #endif
1676         restart_monitor();
1677         return 0;
1678 }
1679
1680
1681 static struct ast_rtp *oh323_get_rtp_peer(struct ast_channel *chan)
1682 {
1683         struct oh323_pvt *p;
1684         p = chan->pvt->pvt;
1685         if (p && p->rtp && p->bridge) {
1686                 return p->rtp;
1687         }
1688         return NULL;
1689 }
1690
1691 static struct ast_rtp *oh323_get_vrtp_peer(struct ast_channel *chan)
1692 {
1693         return NULL;
1694 }
1695
1696 static char *convertcap(int cap)
1697 {
1698         switch (cap) {
1699         case AST_FORMAT_G723_1:
1700                 return "G.723";
1701         case AST_FORMAT_GSM:
1702                 return "GSM";
1703         case AST_FORMAT_ULAW:
1704                 return "ULAW";
1705         case AST_FORMAT_ALAW:
1706                 return "ALAW";
1707         case AST_FORMAT_ADPCM:
1708                 return "G.728";
1709         case AST_FORMAT_G729A:
1710                 return "G.729";
1711         case AST_FORMAT_SPEEX:
1712                 return "SPEEX";
1713         case AST_FORMAT_ILBC:
1714                 return "ILBC";
1715         default:
1716                 ast_log(LOG_NOTICE, "Don't know how to deal with mode %d\n", cap);
1717                 return NULL;
1718         }
1719
1720 }
1721
1722 static int oh323_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp)
1723 {
1724         /* XXX Deal with Video */
1725         struct oh323_pvt *p;
1726         struct sockaddr_in them;
1727         struct sockaddr_in us;
1728         char *mode;
1729
1730         mode = convertcap(chan->writeformat);
1731
1732         if (!rtp) {
1733                 return 0;
1734         }
1735
1736         p = chan->pvt->pvt;
1737         if (!p) {
1738                 ast_log(LOG_ERROR, "No Private Structure, this is bad\n");
1739                 return -1;
1740         }
1741
1742         ast_rtp_get_peer(rtp, &them);
1743         ast_rtp_get_us(rtp, &us);
1744
1745
1746         h323_native_bridge(p->cd.call_token, inet_ntoa(them.sin_addr), mode);
1747
1748         return 0;
1749
1750 }
1751
1752 static struct ast_rtp_protocol oh323_rtp = {
1753         get_rtp_info: oh323_get_rtp_peer,
1754         get_vrtp_info: oh323_get_vrtp_peer,
1755         set_rtp_peer: oh323_set_rtp_peer,
1756 };
1757
1758
1759 int load_module()
1760 {
1761         int res;
1762
1763         res = reload_config();
1764
1765         if (res) {
1766                 return 0;
1767         } else {
1768                 /* Make sure we can register our channel type */
1769                 if (ast_channel_register(type, tdesc, capability, oh323_request)) {
1770                         ast_log(LOG_ERROR, "Unable to register channel class %s\n", type);
1771                         h323_end_process();
1772                         return -1;
1773                 }
1774                 ast_cli_register(&cli_debug);
1775                 ast_cli_register(&cli_no_debug);
1776                 ast_cli_register(&cli_trace);
1777                 ast_cli_register(&cli_no_trace);
1778                 ast_cli_register(&cli_show_codecs);
1779                 ast_cli_register(&cli_gk_cycle);
1780                 ast_cli_register(&cli_hangup_call);
1781                 ast_cli_register(&cli_show_tokens);
1782
1783                 oh323_rtp.type = type;
1784                 ast_rtp_proto_register(&oh323_rtp);
1785
1786                 sched = sched_context_create();
1787                 if (!sched) {
1788                         ast_log(LOG_WARNING, "Unable to create schedule context\n");
1789                 }
1790                 io = io_context_create();
1791                 if (!io) {
1792                         ast_log(LOG_WARNING, "Unable to create I/O context\n");
1793                 }
1794
1795                 /* Register our callback functions */
1796                 h323_callback_register(setup_incoming_call,
1797                                        setup_outgoing_call,
1798                                        create_connection,
1799                                        setup_rtp_connection,
1800                                        cleanup_connection,
1801                                        connection_made,
1802                                        send_digit);
1803
1804
1805                 /* start the h.323 listener */
1806                 if (h323_start_listener(port, bindaddr)) {
1807                         ast_log(LOG_ERROR, "Unable to create H323 listener.\n");
1808 //                      h323_end_process();
1809                         return -1;
1810                 }
1811
1812                 /* Possibly register with a GK */
1813                 if (gatekeeper_disable == 0) {
1814                         if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
1815                                 ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
1816 //                              h323_end_process();
1817                                 return 0;
1818                         }
1819                 }
1820                 /* And start the monitor for the first time */
1821                 restart_monitor();
1822         }
1823         return res;
1824 }
1825
1826
1827 int unload_module()
1828 {
1829         struct oh323_pvt *p, *pl;
1830
1831         if (!ast_mutex_lock(&iflock)) {
1832         /* hangup all interfaces if they have an owner */
1833         p = iflist;
1834         while(p) {
1835                 if (p->owner)
1836                         ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
1837                 p = p->next;
1838         }
1839         iflist = NULL;
1840         ast_mutex_unlock(&iflock);
1841         } else {
1842                 ast_log(LOG_WARNING, "Unable to lock the interface list\n");
1843                 return -1;
1844         }
1845
1846         if (!ast_mutex_lock(&monlock)) {
1847                 if (monitor_thread && (monitor_thread != AST_PTHREADT_STOP)) {
1848                         pthread_cancel(monitor_thread);
1849                         pthread_kill(monitor_thread, SIGURG);
1850                         pthread_join(monitor_thread, NULL);
1851                  }
1852                 monitor_thread = AST_PTHREADT_STOP;
1853                 ast_mutex_unlock(&monlock);
1854         } else {
1855                 ast_log(LOG_WARNING, "Unable to lock the monitor\n");
1856                 return -1;
1857         }
1858
1859         if (!ast_mutex_lock(&iflock)) {
1860                 /* destroy all the interfaces and free their memory */
1861                 p = iflist;
1862                 while(p) {
1863                         pl = p;
1864                         p = p->next;
1865                         /* free associated memory */
1866                         free(pl);
1867                 }
1868                 iflist = NULL;
1869                 ast_mutex_unlock(&iflock);
1870         } else {
1871                 ast_log(LOG_WARNING, "Unable to lock the interface list\n");
1872                 return -1;
1873         }
1874         h323_gk_urq();
1875         h323_end_process();
1876
1877         /* unregister rtp */
1878         ast_rtp_proto_unregister(&oh323_rtp);
1879
1880         /* unregister commands */
1881         ast_cli_unregister(&cli_debug);
1882         ast_cli_unregister(&cli_no_debug);
1883         ast_cli_unregister(&cli_trace);
1884         ast_cli_unregister(&cli_no_trace);
1885         ast_cli_unregister(&cli_show_codecs);
1886         ast_cli_unregister(&cli_gk_cycle);
1887         ast_cli_unregister(&cli_hangup_call);
1888         ast_cli_unregister(&cli_show_tokens);
1889
1890         /* unregister channel type */
1891         ast_channel_unregister(type);
1892
1893         return 0;
1894 }
1895
1896 int usecount()
1897 {
1898         int res;
1899         ast_mutex_lock(&usecnt_lock);
1900         res = usecnt;
1901         ast_mutex_unlock(&usecnt_lock);
1902         return res;
1903 }
1904
1905 char *description()
1906 {
1907         return desc;
1908 }
1909
1910 char *key()
1911 {
1912         return ASTERISK_GPL_KEY;
1913 }
1914
1915
1916
1917