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