channels/chan_h323.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 1999 - 2005
   5  *
   6  * OpenH323 Channel Driver for ASTERISK PBX.
   7  *                      By Jeremy McNamara
   8  *                      For The NuFone Network
   9  *
  10  * chan_h323 has been derived from code created by
  11  *               Michael Manousos and Mark Spencer
  12  *
  13  * See http://www.asterisk.org for more information about
  14  * the Asterisk project. Please do not directly contact
  15  * any of the maintainers of this project for assistance;
  16  * the project provides a web site, mailing lists and IRC
  17  * channels for your use.
  18  *
  19  * This program is free software, distributed under the terms of
  20  * the GNU General Public License Version 2. See the LICENSE file
  21  * at the top of the source tree.
  22  */
  23
  24 /*! \file
  25  *
  26  * \brief This file is part of the chan_h323 driver for Asterisk
  27  *
  28  * \author Jeremy McNamara
  29  *
  30  * \par See also
  31  * \arg Config_h323
  32  *
  33  * \ingroup channel_drivers
  34  */
  35
  36 /*** MODULEINFO
  37         <depend>openh323</depend>
  38         <defaultenabled>no</defaultenabled>
  39  ***/
  40
  41 #ifdef __cplusplus
  42 extern "C" {
  43 #endif
  44
  45 #include "asterisk.h"
  46
  47 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  48
  49 #ifdef __cplusplus
  50 }
  51 #endif
  52
  53 #include <sys/socket.h>
  54 #include <sys/signal.h>
  55 #include <sys/param.h>
  56 #if defined(BSD)
  57 #ifndef IPTOS_MINCOST
  58 #define IPTOS_MINCOST 0x02
  59 #endif
  60 #endif
  61 #include <arpa/inet.h>
  62 #include <net/if.h>
  63 #include <netinet/in.h>
  64 #include <netinet/in_systm.h>
  65 #include <netinet/ip.h>
  66 #include <unistd.h>
  67 #include <stdlib.h>
  68 #include <netdb.h>
  69 #include <stdio.h>
  70 #include <string.h>
  71 #include <errno.h>
  72 #include <fcntl.h>
  73
  74 #ifdef __cplusplus
  75 extern "C" {
  76 #endif
  77
  78 #include "asterisk/lock.h"
  79 #include "asterisk/logger.h"
  80 #include "asterisk/channel.h"
  81 #include "asterisk/config.h"
  82 #include "asterisk/module.h"
  83 #include "asterisk/musiconhold.h"
  84 #include "asterisk/pbx.h"
  85 #include "asterisk/options.h"
  86 #include "asterisk/utils.h"
  87 #include "asterisk/lock.h"
  88 #include "asterisk/sched.h"
  89 #include "asterisk/io.h"
  90 #include "asterisk/rtp.h"
  91 #include "asterisk/acl.h"
  92 #include "asterisk/callerid.h"
  93 #include "asterisk/cli.h"
  94 #include "asterisk/dsp.h"
  95 #include "asterisk/causes.h"
  96 #include "asterisk/stringfields.h"
  97 #include "asterisk/abstract_jb.h"
  98 #include "asterisk/astobj.h"
  99
 100 #ifdef __cplusplus
 101 }
 102 #endif
 103
 104 #include "h323/chan_h323.h"
 105
 106 receive_digit_cb on_receive_digit;
 107 on_rtp_cb on_external_rtp_create;
 108 start_rtp_cb on_start_rtp_channel;
 109 setup_incoming_cb on_incoming_call;
 110 setup_outbound_cb on_outgoing_call;
 111 chan_ringing_cb on_chan_ringing;
 112 con_established_cb on_connection_established;
 113 clear_con_cb on_connection_cleared;
 114 answer_call_cb on_answer_call;
 115 progress_cb on_progress;
 116 rfc2833_cb on_set_rfc2833_payload;
 117 hangup_cb on_hangup;
 118 setcapabilities_cb on_setcapabilities;
 119 setpeercapabilities_cb on_setpeercapabilities;
 120 onhold_cb on_hold;
 121
 122 /* global debug flag */
 123 int h323debug;
 124
 125 /*! Global jitterbuffer configuration - by default, jb is disabled */
 126 static struct ast_jb_conf default_jbconf =
 127 {
 128         .flags = 0,
 129         .max_size = -1,
 130         .resync_threshold = -1,
 131         .impl = ""
 132 };
 133 static struct ast_jb_conf global_jbconf;
 134
 135 /** Variables required by Asterisk */
 136 static const char tdesc[] = "The NuFone Network's Open H.323 Channel Driver";
 137 static const char config[] = "h323.conf";
 138 static char default_context[AST_MAX_CONTEXT] = "default";
 139 static struct sockaddr_in bindaddr;
 140
 141 #define GLOBAL_CAPABILITY (AST_FORMAT_G723_1 | AST_FORMAT_GSM | AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_G729A | AST_FORMAT_G726_AAL2 | AST_FORMAT_H261)
 142
 143 /** H.323 configuration values */
 144 static int h323_signalling_port = 1720;
 145 static char gatekeeper[100];
 146 static int gatekeeper_disable = 1;
 147 static int gatekeeper_discover = 0;
 148 static int gkroute = 0;
 149 /* Find user by alias (h.323 id) is default, alternative is the incomming call's source IP address*/
 150 static int userbyalias = 1;
 151 static int acceptAnonymous = 1;
 152 static int tos = 0;
 153 static char secret[50];
 154 static unsigned int unique = 0;
 155
 156 static call_options_t global_options;
 157
 158 /** Private structure of a OpenH323 channel */
 159 struct oh323_pvt {
 160         ast_mutex_t lock;                                       /* Channel private lock */
 161         call_options_t options;                         /* Options to be used during call setup */
 162         int alreadygone;                                        /* Whether or not we've already been destroyed by our peer */
 163         int needdestroy;                                        /* if we need to be destroyed */
 164         call_details_t cd;                                      /* Call details */
 165         struct ast_channel *owner;                      /* Who owns us */
 166         struct sockaddr_in sa;                          /* Our peer */
 167         struct sockaddr_in redirip;                     /* Where our RTP should be going if not to us */
 168         int nonCodecCapability;                         /* non-audio capability */
 169         int outgoing;                                           /* Outgoing or incoming call? */
 170         char exten[AST_MAX_EXTENSION];          /* Requested extension */
 171         char context[AST_MAX_CONTEXT];          /* Context where to start */
 172         char accountcode[256];                          /* Account code */
 173         char rdnis[80];                                         /* Referring DNIS, if available */
 174         int amaflags;                                           /* AMA Flags */
 175         struct ast_rtp *rtp;                            /* RTP Session */
 176         struct ast_dsp *vad;                            /* Used for in-band DTMF detection */
 177         int nativeformats;                                      /* Codec formats supported by a channel */
 178         int needhangup;                                         /* Send hangup when Asterisk is ready */
 179         int hangupcause;                                        /* Hangup cause from OpenH323 layer */
 180         int newstate;                                           /* Pending state change */
 181         int newcontrol;                                         /* Pending control to send */
 182         int newdigit;                                           /* Pending DTMF digit to send */
 183         int newduration;                                        /* Pending DTMF digit duration to send */
 184         int pref_codec;                                         /* Preferred codec */
 185         int peercapability;                                     /* Capabilities learned from peer */
 186         int jointcapability;                            /* Common capabilities for local and remote side */
 187         struct ast_codec_pref peer_prefs;       /* Preferenced list of codecs which remote side supports */
 188         int dtmf_pt[2];                                         /* Payload code used for RFC2833/CISCO messages */
 189         int curDTMF;                                            /* DTMF tone being generated to Asterisk side */
 190         int DTMFsched;                                          /* Scheduler descriptor for DTMF */
 191         int update_rtp_info;                            /* Configuration of fd's array is pending */
 192         int recvonly;                                           /* Peer isn't wish to receive our voice stream */
 193         int txDtmfDigit;                                        /* DTMF digit being to send to H.323 side */
 194         int noInbandDtmf;                                       /* Inband DTMF processing by DSP isn't available */
 195         int connection_established;                     /* Call got CONNECT message */
 196         int got_progress;                                       /* Call got PROGRESS message, pass inband audio */
 197         struct oh323_pvt *next;                         /* Next channel in list */
 198 } *iflist = NULL;
 199
 200 static struct ast_user_list {
 201         ASTOBJ_CONTAINER_COMPONENTS(struct oh323_user);
 202 } userl;
 203
 204 static struct ast_peer_list {
 205         ASTOBJ_CONTAINER_COMPONENTS(struct oh323_peer);
 206 } peerl;
 207
 208 static struct ast_alias_list {
 209         ASTOBJ_CONTAINER_COMPONENTS(struct oh323_alias);
 210 } aliasl;
 211
 212 /** Asterisk RTP stuff */
 213 static struct sched_context *sched;
 214 static struct io_context *io;
 215
 216 /** Protect the interface list (oh323_pvt) */
 217 AST_MUTEX_DEFINE_STATIC(iflock);
 218
 219 /* Protect the monitoring thread, so only one process can kill or start it, and not
 220    when it's doing something critical. */
 221 AST_MUTEX_DEFINE_STATIC(monlock);
 222
 223 /* Protect the H.323 capabilities list, to avoid more than one channel to set the capabilities simultaneaously in the h323 stack. */
 224 AST_MUTEX_DEFINE_STATIC(caplock);
 225
 226 /* Protect the reload process */
 227 AST_MUTEX_DEFINE_STATIC(h323_reload_lock);
 228 static int h323_reloading = 0;
 229
 230 /* This is the thread for the monitor which checks for input on the channels
 231    which are not currently in use. */
 232 static pthread_t monitor_thread = AST_PTHREADT_NULL;
 233 static int restart_monitor(void);
 234 static int h323_do_reload(void);
 235
 236 static struct ast_channel *oh323_request(const char *type, int format, void *data, int *cause);
 237 static int oh323_digit_begin(struct ast_channel *c, char digit);
 238 static int oh323_digit_end(struct ast_channel *c, char digit);
 239 static int oh323_call(struct ast_channel *c, char *dest, int timeout);
 240 static int oh323_hangup(struct ast_channel *c);
 241 static int oh323_answer(struct ast_channel *c);
 242 static struct ast_frame *oh323_read(struct ast_channel *c);
 243 static int oh323_write(struct ast_channel *c, struct ast_frame *frame);
 244 static int oh323_indicate(struct ast_channel *c, int condition, const void *data, size_t datalen);
 245 static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
 246
 247 static const struct ast_channel_tech oh323_tech = {
 248         .type = "H323",
 249         .description = tdesc,
 250         .capabilities = ((AST_FORMAT_MAX_AUDIO << 1) - 1),
 251         .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER,
 252         .requester = oh323_request,
 253         .send_digit_begin = oh323_digit_begin,
 254         .send_digit_end = oh323_digit_end,
 255         .call = oh323_call,
 256         .hangup = oh323_hangup,
 257         .answer = oh323_answer,
 258         .read = oh323_read,
 259         .write = oh323_write,
 260         .indicate = oh323_indicate,
 261         .fixup = oh323_fixup,
 262         /* disable, for now */
 263 #if 0
 264         .bridge = ast_rtp_bridge,
 265 #endif
 266 };
 267
 268 static const char* redirectingreason2str(int redirectingreason)
 269 {
 270         switch (redirectingreason) {
 271         case 0:
 272                 return "UNKNOWN";
 273         case 1:
 274                 return "BUSY";
 275         case 2:
 276                 return "NO_REPLY";
 277         case 0xF:
 278                 return "UNCONDITIONAL";
 279         default:
 280                 return "NOREDIRECT";
 281         }
 282 }
 283
 284 static void oh323_destroy_alias(struct oh323_alias *alias)
 285 {
 286         if (h323debug)
 287                 ast_log(LOG_DEBUG, "Destroying alias '%s'\n", alias->name);
 288         free(alias);
 289 }
 290
 291 static void oh323_destroy_user(struct oh323_user *user)
 292 {
 293         if (h323debug)
 294                 ast_log(LOG_DEBUG, "Destroying user '%s'\n", user->name);
 295         ast_free_ha(user->ha);
 296         free(user);
 297 }
 298
 299 static void oh323_destroy_peer(struct oh323_peer *peer)
 300 {
 301         if (h323debug)
 302                 ast_log(LOG_DEBUG, "Destroying peer '%s'\n", peer->name);
 303         ast_free_ha(peer->ha);
 304         free(peer);
 305 }
 306
 307 static int oh323_simulate_dtmf_end(void *data)
 308 {
 309         struct oh323_pvt *pvt = data;
 310
 311         if (pvt) {
 312                 ast_mutex_lock(&pvt->lock);
 313                 /* Don't hold pvt lock while trying to lock the channel */
 314                 while(pvt->owner && ast_channel_trylock(pvt->owner)) {
 315                         ast_mutex_unlock(&pvt->lock);
 316                         usleep(1);
 317                         ast_mutex_lock(&pvt->lock);
 318                 }
 319
 320                 if (pvt->owner) {
 321                         struct ast_frame f = {
 322                                 .frametype = AST_FRAME_DTMF_END,
 323                                 .subclass = pvt->curDTMF,
 324                                 .samples = 0,
 325                                 .src = "SIMULATE_DTMF_END",
 326                         };
 327                         ast_queue_frame(pvt->owner, &f);
 328                         ast_channel_unlock(pvt->owner);
 329                 }
 330
 331                 pvt->DTMFsched = -1;
 332                 ast_mutex_unlock(&pvt->lock);
 333         }
 334
 335         return 0;
 336 }
 337
 338 /* Channel and private structures should be already locked */
 339 static void __oh323_update_info(struct ast_channel *c, struct oh323_pvt *pvt)
 340 {
 341         if (c->nativeformats != pvt->nativeformats) {
 342                 if (h323debug)
 343                         ast_log(LOG_DEBUG, "Preparing %s for new native format\n", c->name);
 344                 c->nativeformats = pvt->nativeformats;
 345                 ast_set_read_format(c, c->readformat);
 346                 ast_set_write_format(c, c->writeformat);
 347         }
 348         if (pvt->needhangup) {
 349                 if (h323debug)
 350                         ast_log(LOG_DEBUG, "Process pending hangup for %s\n", c->name);
 351                 c->_softhangup |= AST_SOFTHANGUP_DEV;
 352                 c->hangupcause = pvt->hangupcause;
 353                 ast_queue_hangup(c);
 354                 pvt->needhangup = 0;
 355                 pvt->newstate = pvt->newcontrol = pvt->newdigit = pvt->DTMFsched = -1;
 356         }
 357         if (pvt->newstate >= 0) {
 358                 ast_setstate(c, pvt->newstate);
 359                 pvt->newstate = -1;
 360         }
 361         if (pvt->newcontrol >= 0) {
 362                 ast_queue_control(c, pvt->newcontrol);
 363                 pvt->newcontrol = -1;
 364         }
 365         if (pvt->newdigit >= 0) {
 366                 struct ast_frame f = {
 367                         .frametype = AST_FRAME_DTMF_END,
 368                         .subclass = pvt->newdigit,
 369                         .samples = pvt->newduration * 8,
 370                         .src = "UPDATE_INFO",
 371                 };
 372                 if (pvt->newdigit == ' ') {             /* signalUpdate message */
 373                         f.subclass = pvt->curDTMF;
 374                         if (pvt->DTMFsched >= 0) {
 375                                 ast_sched_del(sched, pvt->DTMFsched);
 376                                 pvt->DTMFsched = -1;
 377                         }
 378                 } else {                                                /* Regular input or signal message */
 379                         if (pvt->newduration) {         /* This is a signal, signalUpdate follows */
 380                                 f.frametype = AST_FRAME_DTMF_BEGIN;
 381                                 if (pvt->DTMFsched >= 0)
 382                                         ast_sched_del(sched, pvt->DTMFsched);
 383                                 pvt->DTMFsched = ast_sched_add(sched, pvt->newduration, oh323_simulate_dtmf_end, pvt);
 384                                 if (h323debug)
 385                                         ast_log(LOG_DTMF, "Scheduled DTMF END simulation for %d ms, id=%d\n", pvt->newduration, pvt->DTMFsched);
 386                         }
 387                         pvt->curDTMF = pvt->newdigit;
 388                 }
 389                 ast_queue_frame(c, &f);
 390                 pvt->newdigit = -1;
 391         }
 392         if (pvt->update_rtp_info > 0) {
 393                 if (pvt->rtp) {
 394                         ast_jb_configure(c, &global_jbconf);
 395                         c->fds[0] = ast_rtp_fd(pvt->rtp);
 396                         c->fds[1] = ast_rtcp_fd(pvt->rtp);
 397                         ast_queue_frame(pvt->owner, &ast_null_frame);   /* Tell Asterisk to apply changes */
 398                 }
 399                 pvt->update_rtp_info = -1;
 400         }
 401 }
 402
 403 /* Only channel structure should be locked */
 404 static void oh323_update_info(struct ast_channel *c)
 405 {
 406         struct oh323_pvt *pvt = c->tech_pvt;
 407
 408         if (pvt) {
 409                 ast_mutex_lock(&pvt->lock);
 410                 __oh323_update_info(c, pvt);
 411                 ast_mutex_unlock(&pvt->lock);
 412         }
 413 }
 414
 415 static void cleanup_call_details(call_details_t *cd)
 416 {
 417         if (cd->call_token) {
 418                 free(cd->call_token);
 419                 cd->call_token = NULL;
 420         }
 421         if (cd->call_source_aliases) {
 422                 free(cd->call_source_aliases);
 423                 cd->call_source_aliases = NULL;
 424         }
 425         if (cd->call_dest_alias) {
 426                 free(cd->call_dest_alias);
 427                 cd->call_dest_alias = NULL;
 428         }
 429         if (cd->call_source_name) {
 430                 free(cd->call_source_name);
 431                 cd->call_source_name = NULL;
 432         }
 433         if (cd->call_source_e164) {
 434                 free(cd->call_source_e164);
 435                 cd->call_source_e164 = NULL;
 436         }
 437         if (cd->call_dest_e164) {
 438                 free(cd->call_dest_e164);
 439                 cd->call_dest_e164 = NULL;
 440         }
 441         if (cd->sourceIp) {
 442                 free(cd->sourceIp);
 443                 cd->sourceIp = NULL;
 444         }
 445         if (cd->redirect_number) {
 446                 free(cd->redirect_number);
 447                 cd->redirect_number = NULL;
 448         }
 449 }
 450
 451 static void __oh323_destroy(struct oh323_pvt *pvt)
 452 {
 453         struct oh323_pvt *cur, *prev = NULL;
 454
 455         if (pvt->DTMFsched >= 0) {
 456                 ast_sched_del(sched, pvt->DTMFsched);
 457                 pvt->DTMFsched = -1;
 458         }
 459
 460         if (pvt->rtp) {
 461                 ast_rtp_destroy(pvt->rtp);
 462         }
 463
 464         /* Free dsp used for in-band DTMF detection */
 465         if (pvt->vad) {
 466                 ast_dsp_free(pvt->vad);
 467         }
 468         cleanup_call_details(&pvt->cd);
 469
 470         /* Unlink us from the owner if we have one */
 471         if (pvt->owner) {
 472                 ast_channel_lock(pvt->owner);
 473                 if (h323debug)
 474                         ast_log(LOG_DEBUG, "Detaching from %s\n", pvt->owner->name);
 475                 pvt->owner->tech_pvt = NULL;
 476                 ast_channel_unlock(pvt->owner);
 477         }
 478         cur = iflist;
 479         while(cur) {
 480                 if (cur == pvt) {
 481                         if (prev)
 482                                 prev->next = cur->next;
 483                         else
 484                                 iflist = cur->next;
 485                         break;
 486                 }
 487                 prev = cur;
 488                 cur = cur->next;
 489         }
 490         if (!cur) {
 491                 ast_log(LOG_WARNING, "%p is not in list?!?! \n", cur);
 492         } else {
 493                 ast_mutex_unlock(&pvt->lock);
 494                 ast_mutex_destroy(&pvt->lock);
 495                 free(pvt);
 496         }
 497 }
 498
 499 static void oh323_destroy(struct oh323_pvt *pvt)
 500 {
 501         if (h323debug) {
 502                 ast_log(LOG_DEBUG, "Destroying channel %s\n", (pvt->owner ? pvt->owner->name : "<unknown>"));
 503         }
 504         ast_mutex_lock(&iflock);
 505         ast_mutex_lock(&pvt->lock);
 506         __oh323_destroy(pvt);
 507         ast_mutex_unlock(&iflock);
 508 }
 509
 510 static int oh323_digit_begin(struct ast_channel *c, char digit)
 511 {
 512         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
 513         char *token;
 514
 515         if (!pvt) {
 516                 ast_log(LOG_ERROR, "No private structure?! This is bad\n");
 517                 return -1;
 518         }
 519         ast_mutex_lock(&pvt->lock);
 520         if (pvt->rtp &&
 521                 (((pvt->options.dtmfmode & H323_DTMF_RFC2833) && pvt->dtmf_pt[0])
 522                  /*|| ((pvt->options.dtmfmode & H323_DTMF_CISCO) && pvt->dtmf_pt[1]))*/)) {
 523                 /* out-of-band DTMF */
 524                 if (h323debug) {
 525                         ast_log(LOG_DTMF, "Begin sending out-of-band digit %c on %s\n", digit, c->name);
 526                 }
 527                 ast_rtp_senddigit_begin(pvt->rtp, digit);
 528                 ast_mutex_unlock(&pvt->lock);
 529         } else if (pvt->txDtmfDigit != digit) {
 530                 /* in-band DTMF */
 531                 if (h323debug) {
 532                         ast_log(LOG_DTMF, "Begin sending inband digit %c on %s\n", digit, c->name);
 533                 }
 534                 pvt->txDtmfDigit = digit;
 535                 token = pvt->cd.call_token ? strdup(pvt->cd.call_token) : NULL;
 536                 ast_mutex_unlock(&pvt->lock);
 537                 h323_send_tone(token, digit);
 538                 if (token) {
 539                         free(token);
 540                 }
 541         } else
 542                 ast_mutex_unlock(&pvt->lock);
 543         oh323_update_info(c);
 544         return 0;
 545 }
 546
 547 /**
 548  * Send (play) the specified digit to the channel.
 549  *
 550  */
 551 static int oh323_digit_end(struct ast_channel *c, char digit)
 552 {
 553         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
 554         char *token;
 555
 556         if (!pvt) {
 557                 ast_log(LOG_ERROR, "No private structure?! This is bad\n");
 558                 return -1;
 559         }
 560         ast_mutex_lock(&pvt->lock);
 561         if (pvt->rtp && (pvt->options.dtmfmode & H323_DTMF_RFC2833) && ((pvt->dtmf_pt[0] > 0) || (pvt->dtmf_pt[0] > 0))) {
 562                 /* out-of-band DTMF */
 563                 if (h323debug) {
 564                         ast_log(LOG_DTMF, "End sending out-of-band digit %c on %s\n", digit, c->name);
 565                 }
 566                 ast_rtp_senddigit_end(pvt->rtp, digit);
 567                 ast_mutex_unlock(&pvt->lock);
 568         } else {
 569                 /* in-band DTMF */
 570                 if (h323debug) {
 571                         ast_log(LOG_DTMF, "End sending inband digit %c on %s\n", digit, c->name);
 572                 }
 573                 pvt->txDtmfDigit = ' ';
 574                 token = pvt->cd.call_token ? strdup(pvt->cd.call_token) : NULL;
 575                 ast_mutex_unlock(&pvt->lock);
 576                 h323_send_tone(token, ' ');
 577                 if (token) {
 578                         free(token);
 579                 }
 580         }
 581         oh323_update_info(c);
 582         return 0;
 583 }
 584
 585 /**
 586  * Make a call over the specified channel to the specified
 587  * destination.
 588  * Returns -1 on error, 0 on success.
 589  */
 590 static int oh323_call(struct ast_channel *c, char *dest, int timeout)
 591 {
 592         int res = 0;
 593         struct oh323_pvt *pvt = (struct oh323_pvt *)c->tech_pvt;
 594         const char *addr;
 595         char called_addr[1024];
 596
 597         if (h323debug) {
 598                 ast_log(LOG_DEBUG, "Calling to %s on %s\n", dest, c->name);
 599         }
 600         if ((c->_state != AST_STATE_DOWN) && (c->_state != AST_STATE_RESERVED)) {
 601                 ast_log(LOG_WARNING, "Line is already in use (%s)\n", c->name);
 602                 return -1;
 603         }
 604         ast_mutex_lock(&pvt->lock);
 605         if (!gatekeeper_disable) {
 606                 if (ast_strlen_zero(pvt->exten)) {
 607                         ast_copy_string(called_addr, dest, sizeof(called_addr));
 608                 } else {
 609                         snprintf(called_addr, sizeof(called_addr), "%s@%s", pvt->exten, dest);
 610                 }
 611         } else {
 612                 res = htons(pvt->sa.sin_port);
 613                 addr = ast_inet_ntoa(pvt->sa.sin_addr);
 614                 if (ast_strlen_zero(pvt->exten)) {
 615                         snprintf(called_addr, sizeof(called_addr), "%s:%d", addr, res);
 616                 } else {
 617                         snprintf(called_addr, sizeof(called_addr), "%s@%s:%d", pvt->exten, addr, res);
 618                 }
 619         }
 620         /* make sure null terminated */
 621         called_addr[sizeof(called_addr) - 1] = '\0';
 622
 623         if (c->cid.cid_num)
 624                 ast_copy_string(pvt->options.cid_num, c->cid.cid_num, sizeof(pvt->options.cid_num));
 625
 626         if (c->cid.cid_name)
 627                 ast_copy_string(pvt->options.cid_name, c->cid.cid_name, sizeof(pvt->options.cid_name));
 628
 629         if (c->cid.cid_rdnis) {
 630                 ast_copy_string(pvt->options.cid_rdnis, c->cid.cid_rdnis, sizeof(pvt->options.cid_rdnis));
 631         }
 632
 633         pvt->options.presentation = c->cid.cid_pres;
 634         pvt->options.type_of_number = c->cid.cid_ton;
 635
 636         if ((addr = pbx_builtin_getvar_helper(c, "PRIREDIRECTREASON"))) {
 637                 if (!strcasecmp(addr, "UNKNOWN"))
 638                         pvt->options.redirect_reason = 0;
 639                 else if (!strcasecmp(addr, "BUSY"))
 640                         pvt->options.redirect_reason = 1;
 641                 else if (!strcasecmp(addr, "NO_REPLY"))
 642                         pvt->options.redirect_reason = 2;
 643                 else if (!strcasecmp(addr, "UNCONDITIONAL"))
 644                         pvt->options.redirect_reason = 15;
 645                 else
 646                         pvt->options.redirect_reason = -1;
 647         } else
 648                 pvt->options.redirect_reason = -1;
 649
 650         pvt->options.transfer_capability = c->transfercapability;
 651
 652         /* indicate that this is an outgoing call */
 653         pvt->outgoing = 1;
 654
 655         if (option_verbose > 2)
 656                 ast_verbose(VERBOSE_PREFIX_3 "Requested transfer capability: 0x%.2x - %s\n", c->transfercapability, ast_transfercapability2str(c->transfercapability));
 657         if (h323debug)
 658                 ast_log(LOG_DEBUG, "Placing outgoing call to %s, %d/%d\n", called_addr, pvt->options.dtmfcodec[0], pvt->options.dtmfcodec[1]);
 659         ast_mutex_unlock(&pvt->lock);
 660         res = h323_make_call(called_addr, &(pvt->cd), &pvt->options);
 661         if (res) {
 662                 ast_log(LOG_NOTICE, "h323_make_call failed(%s)\n", c->name);
 663                 return -1;
 664         }
 665         oh323_update_info(c);
 666         return 0;
 667 }
 668
 669 static int oh323_answer(struct ast_channel *c)
 670 {
 671         int res;
 672         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
 673         char *token;
 674
 675         if (h323debug)
 676                 ast_log(LOG_DEBUG, "Answering on %s\n", c->name);
 677
 678         ast_mutex_lock(&pvt->lock);
 679         token = pvt->cd.call_token ? strdup(pvt->cd.call_token) : NULL;
 680         ast_mutex_unlock(&pvt->lock);
 681         res = h323_answering_call(token, 0);
 682         if (token)
 683                 free(token);
 684
 685         oh323_update_info(c);
 686         if (c->_state != AST_STATE_UP) {
 687                 ast_setstate(c, AST_STATE_UP);
 688         }
 689         return res;
 690 }
 691
 692 static int oh323_hangup(struct ast_channel *c)
 693 {
 694         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
 695         int q931cause = AST_CAUSE_NORMAL_CLEARING;
 696         char *call_token;
 697
 698
 699         if (h323debug)
 700                 ast_log(LOG_DEBUG, "Hanging up and scheduling destroy of call %s\n", c->name);
 701
 702         if (!c->tech_pvt) {
 703                 ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
 704                 return 0;
 705         }
 706         ast_mutex_lock(&pvt->lock);
 707         /* Determine how to disconnect */
 708         if (pvt->owner != c) {
 709                 ast_log(LOG_WARNING, "Huh?  We aren't the owner?\n");
 710                 ast_mutex_unlock(&pvt->lock);
 711                 return 0;
 712         }
 713
 714         pvt->owner = NULL;
 715         c->tech_pvt = NULL;
 716
 717         if (c->hangupcause) {
 718                 q931cause = c->hangupcause;
 719         } else {
 720                 const char *cause = pbx_builtin_getvar_helper(c, "DIALSTATUS");
 721                 if (cause) {
 722                         if (!strcmp(cause, "CONGESTION")) {
 723                                 q931cause = AST_CAUSE_NORMAL_CIRCUIT_CONGESTION;
 724                         } else if (!strcmp(cause, "BUSY")) {
 725                                 q931cause = AST_CAUSE_USER_BUSY;
 726                         } else if (!strcmp(cause, "CHANISUNVAIL")) {
 727                                 q931cause = AST_CAUSE_REQUESTED_CHAN_UNAVAIL;
 728                         } else if (!strcmp(cause, "NOANSWER")) {
 729                                 q931cause = AST_CAUSE_NO_ANSWER;
 730                         } else if (!strcmp(cause, "CANCEL")) {
 731                                 q931cause = AST_CAUSE_CALL_REJECTED;
 732                         }
 733                 }
 734         }
 735
 736         /* Start the process if it's not already started */
 737         if (!pvt->alreadygone && !pvt->hangupcause) {
 738                 call_token = pvt->cd.call_token ? strdup(pvt->cd.call_token) : NULL;
 739                 if (call_token) {
 740                         /* Release lock to eliminate deadlock */
 741                         ast_mutex_unlock(&pvt->lock);
 742                         if (h323_clear_call(call_token, q931cause)) {
 743                                 ast_log(LOG_WARNING, "ClearCall failed.\n");
 744                         }
 745                         free(call_token);
 746                         ast_mutex_lock(&pvt->lock);
 747                 }
 748         }
 749         pvt->needdestroy = 1;
 750         ast_mutex_unlock(&pvt->lock);
 751
 752         /* Update usage counter */
 753         ast_module_unref(ast_module_info->self);
 754
 755         return 0;
 756 }
 757
 758 static struct ast_frame *oh323_rtp_read(struct oh323_pvt *pvt)
 759 {
 760         /* Retrieve audio/etc from channel. Assumes pvt->lock is already held. */
 761         struct ast_frame *f;
 762
 763         /* Only apply it for the first packet, we just need the correct ip/port */
 764         if (pvt->options.nat) {
 765                 ast_rtp_setnat(pvt->rtp, pvt->options.nat);
 766                 pvt->options.nat = 0;
 767         }
 768
 769         f = ast_rtp_read(pvt->rtp);
 770         /* Don't send RFC2833 if we're not supposed to */
 771         if (f && (f->frametype == AST_FRAME_DTMF) && !(pvt->options.dtmfmode & (H323_DTMF_RFC2833 | H323_DTMF_CISCO))) {
 772                 return &ast_null_frame;
 773         }
 774         if (pvt->owner) {
 775                 /* We already hold the channel lock */
 776                 if (f->frametype == AST_FRAME_VOICE) {
 777                         if (f->subclass != pvt->owner->nativeformats) {
 778                                 /* Try to avoid deadlock */
 779                                 if (ast_channel_trylock(pvt->owner)) {
 780                                         ast_log(LOG_NOTICE, "Format changed but channel is locked. Ignoring frame...\n");
 781                                         return &ast_null_frame;
 782                                 }
 783                                 if (h323debug)
 784                                         ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
 785                                 pvt->owner->nativeformats = f->subclass;
 786                                 pvt->nativeformats = f->subclass;
 787                                 ast_set_read_format(pvt->owner, pvt->owner->readformat);
 788                                 ast_set_write_format(pvt->owner, pvt->owner->writeformat);
 789                                 ast_channel_unlock(pvt->owner);
 790                         }
 791                         /* Do in-band DTMF detection */
 792                         if ((pvt->options.dtmfmode & H323_DTMF_INBAND) && pvt->vad) {
 793                                 if ((pvt->nativeformats & (AST_FORMAT_SLINEAR | AST_FORMAT_ALAW | AST_FORMAT_ULAW))) {
 794                                         if (!ast_channel_trylock(pvt->owner)) {
 795                                                 f = ast_dsp_process(pvt->owner, pvt->vad, f);
 796                                                 ast_channel_unlock(pvt->owner);
 797                                         }
 798                                         else
 799                                                 ast_log(LOG_NOTICE, "Unable to process inband DTMF while channel is locked\n");
 800                                 } else if (pvt->nativeformats && !pvt->noInbandDtmf) {
 801                                         ast_log(LOG_NOTICE, "Inband DTMF is not supported on codec %s. Use RFC2833\n", ast_getformatname(f->subclass));
 802                                         pvt->noInbandDtmf = 1;
 803                                 }
 804                                 if (f &&(f->frametype == AST_FRAME_DTMF)) {
 805                                         if (h323debug)
 806                                                 ast_log(LOG_DTMF, "Received in-band digit %c.\n", f->subclass);
 807                                 }
 808                         }
 809                 }
 810         }
 811         return f;
 812 }
 813
 814 static struct ast_frame *oh323_read(struct ast_channel *c)
 815 {
 816         struct ast_frame *fr;
 817         struct oh323_pvt *pvt = (struct oh323_pvt *)c->tech_pvt;
 818         ast_mutex_lock(&pvt->lock);
 819         __oh323_update_info(c, pvt);
 820         switch(c->fdno) {
 821         case 0:
 822                 fr = oh323_rtp_read(pvt);
 823                 break;
 824         case 1:
 825                 if (pvt->rtp)
 826                         fr = ast_rtcp_read(pvt->rtp);
 827                 else
 828                         fr = &ast_null_frame;
 829                 break;
 830         default:
 831                 ast_log(LOG_ERROR, "Unable to handle fd %d on channel %s\n", c->fdno, c->name);
 832                 fr = &ast_null_frame;
 833                 break;
 834         }
 835         ast_mutex_unlock(&pvt->lock);
 836         return fr;
 837 }
 838
 839 static int oh323_write(struct ast_channel *c, struct ast_frame *frame)
 840 {
 841         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
 842         int res = 0;
 843         if (frame->frametype != AST_FRAME_VOICE) {
 844                 if (frame->frametype == AST_FRAME_IMAGE) {
 845                         return 0;
 846                 } else {
 847                         ast_log(LOG_WARNING, "Can't send %d type frames with H323 write\n", frame->frametype);
 848                         return 0;
 849                 }
 850         } else {
 851                 if (!(frame->subclass & c->nativeformats)) {
 852                         ast_log(LOG_WARNING, "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
 853                                 frame->subclass, c->nativeformats, c->readformat, c->writeformat);
 854                         return 0;
 855                 }
 856         }
 857         if (pvt) {
 858                 ast_mutex_lock(&pvt->lock);
 859                 if (pvt->rtp && !pvt->recvonly)
 860                         res = ast_rtp_write(pvt->rtp, frame);
 861                 __oh323_update_info(c, pvt);
 862                 ast_mutex_unlock(&pvt->lock);
 863         }
 864         return res;
 865 }
 866
 867 static int oh323_indicate(struct ast_channel *c, int condition, const void *data, size_t datalen)
 868 {
 869
 870         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
 871         char *token = (char *)NULL;
 872         int res = -1;
 873         int got_progress;
 874
 875         ast_mutex_lock(&pvt->lock);
 876         token = (pvt->cd.call_token ? strdup(pvt->cd.call_token) : NULL);
 877         got_progress = pvt->got_progress;
 878         if (condition == AST_CONTROL_PROGRESS)
 879                 pvt->got_progress = 1;
 880         else if ((condition == AST_CONTROL_BUSY) || (condition == AST_CONTROL_CONGESTION))
 881                 pvt->alreadygone = 1;
 882         ast_mutex_unlock(&pvt->lock);
 883
 884         if (h323debug)
 885                 ast_log(LOG_DEBUG, "OH323: Indicating %d on %s (%s)\n", condition, token, c->name);
 886
 887         switch(condition) {
 888         case AST_CONTROL_RINGING:
 889                 if (c->_state == AST_STATE_RING || c->_state == AST_STATE_RINGING) {
 890                         h323_send_alerting(token);
 891                         res = (got_progress ? 0 : -1);  /* Do not simulate any audio tones if we got PROGRESS message */
 892                 }
 893                 break;
 894         case AST_CONTROL_PROGRESS:
 895                 if (c->_state != AST_STATE_UP) {
 896                         /* Do not send PROGRESS message more than once */
 897                         if (!got_progress)
 898                                 h323_send_progress(token);
 899                         res = 0;
 900                 }
 901                 break;
 902         case AST_CONTROL_BUSY:
 903                 if (c->_state != AST_STATE_UP) {
 904                         h323_answering_call(token, 1);
 905                         ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV);
 906                         res = 0;
 907                 }
 908                 break;
 909         case AST_CONTROL_CONGESTION:
 910                 if (c->_state != AST_STATE_UP) {
 911                         h323_answering_call(token, 1);
 912                         ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV);
 913                         res = 0;
 914                 }
 915                 break;
 916         case AST_CONTROL_HOLD:
 917                 h323_hold_call(token, 1);
 918                 /* We should start MOH only if remote party isn't provide audio for us */
 919                 ast_moh_start(c, data, NULL);
 920                 res = 0;
 921                 break;
 922         case AST_CONTROL_UNHOLD:
 923                 h323_hold_call(token, 0);
 924                 ast_moh_stop(c);
 925                 res = 0;
 926                 break;
 927         case AST_CONTROL_PROCEEDING:
 928         case -1:
 929                 break;
 930         default:
 931                 ast_log(LOG_WARNING, "OH323: Don't know how to indicate condition %d on %s\n", condition, token);
 932                 break;
 933         }
 934
 935         if (h323debug)
 936                 ast_log(LOG_DEBUG, "OH323: Indicated %d on %s, res=%d\n", condition, token, res);
 937         if (token)
 938                 free(token);
 939         oh323_update_info(c);
 940
 941         return res;
 942 }
 943
 944 static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
 945 {
 946         struct oh323_pvt *pvt = (struct oh323_pvt *) newchan->tech_pvt;
 947
 948         ast_mutex_lock(&pvt->lock);
 949         if (pvt->owner != oldchan) {
 950                 ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, pvt->owner);
 951                 return -1;
 952         }
 953         pvt->owner = newchan;
 954         ast_mutex_unlock(&pvt->lock);
 955         return 0;
 956 }
 957
 958 static int __oh323_rtp_create(struct oh323_pvt *pvt)
 959 {
 960         struct in_addr our_addr;
 961
 962         if (pvt->rtp)
 963                 return 0;
 964
 965         if (ast_find_ourip(&our_addr, bindaddr)) {
 966                 ast_mutex_unlock(&pvt->lock);
 967                 ast_log(LOG_ERROR, "Unable to locate local IP address for RTP stream\n");
 968                 return -1;
 969         }
 970         pvt->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, our_addr);
 971         if (!pvt->rtp) {
 972                 ast_mutex_unlock(&pvt->lock);
 973                 ast_log(LOG_WARNING, "Unable to create RTP session: %s\n", strerror(errno));
 974                 return -1;
 975         }
 976         if (h323debug)
 977                 ast_log(LOG_DEBUG, "Created RTP channel\n");
 978
 979         ast_rtp_settos(pvt->rtp, tos);
 980
 981         if (h323debug)
 982                 ast_log(LOG_DEBUG, "Setting NAT on RTP to %d\n", pvt->options.nat);
 983         ast_rtp_setnat(pvt->rtp, pvt->options.nat);
 984
 985         if (pvt->dtmf_pt[0] > 0)
 986                 ast_rtp_set_rtpmap_type(pvt->rtp, pvt->dtmf_pt[0], "audio", "telephone-event", 0);
 987         if (pvt->dtmf_pt[1] > 0)
 988                 ast_rtp_set_rtpmap_type(pvt->rtp, pvt->dtmf_pt[1], "audio", "cisco-telephone-event", 0);
 989
 990         if (pvt->peercapability)
 991                 ast_rtp_codec_setpref(pvt->rtp, &pvt->peer_prefs);
 992
 993         if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
 994                 ast_jb_configure(pvt->owner, &global_jbconf);
 995                 pvt->owner->fds[0] = ast_rtp_fd(pvt->rtp);
 996                 pvt->owner->fds[1] = ast_rtcp_fd(pvt->rtp);
 997                 ast_queue_frame(pvt->owner, &ast_null_frame);   /* Tell Asterisk to apply changes */
 998                 ast_channel_unlock(pvt->owner);
 999         } else
1000                 pvt->update_rtp_info = 1;
1001
1002         return 0;
1003 }
1004
1005 /* Private structure should be locked on a call */
1006 static struct ast_channel *__oh323_new(struct oh323_pvt *pvt, int state, const char *host)
1007 {
1008         struct ast_channel *ch;
1009         char *cid_num, *cid_name;
1010         int fmt;
1011
1012         if (!ast_strlen_zero(pvt->options.cid_num))
1013                 cid_num = pvt->options.cid_num;
1014         else
1015                 cid_num = pvt->cd.call_source_e164;
1016
1017         if (!ast_strlen_zero(pvt->options.cid_name))
1018                 cid_name = pvt->options.cid_name;
1019         else
1020                 cid_name = pvt->cd.call_source_name;
1021
1022         /* Don't hold a oh323_pvt lock while we allocate a chanel */
1023         ast_mutex_unlock(&pvt->lock);
1024         ch = ast_channel_alloc(1, state, cid_num, cid_name, "H323/%s", host);
1025         /* Update usage counter */
1026         ast_module_ref(ast_module_info->self);
1027         ast_mutex_lock(&pvt->lock);
1028         if (ch) {
1029                 ch->tech = &oh323_tech;
1030                 if (!(fmt = pvt->jointcapability) && !(fmt = pvt->options.capability))
1031                         fmt = global_options.capability;
1032                 ch->nativeformats = ast_codec_choose(&pvt->options.prefs, fmt, 1)/* | (pvt->jointcapability & AST_FORMAT_VIDEO_MASK)*/;
1033                 pvt->nativeformats = ch->nativeformats;
1034                 fmt = ast_best_codec(ch->nativeformats);
1035                 ch->writeformat = fmt;
1036                 ch->rawwriteformat = fmt;
1037                 ch->readformat = fmt;
1038                 ch->rawreadformat = fmt;
1039 #if 0
1040                 ch->fds[0] = ast_rtp_fd(pvt->rtp);
1041                 ch->fds[1] = ast_rtcp_fd(pvt->rtp);
1042 #endif
1043 #ifdef VIDEO_SUPPORT
1044                 if (pvt->vrtp) {
1045                         ch->fds[2] = ast_rtp_fd(pvt->vrtp);
1046                         ch->fds[3] = ast_rtcp_fd(pvt->vrtp);
1047                 }
1048 #endif
1049 #ifdef T38_SUPPORT
1050                 if (pvt->udptl) {
1051                         ch->fds[4] = ast_udptl_fd(pvt->udptl);
1052                 }
1053 #endif
1054                 if (state == AST_STATE_RING) {
1055                         ch->rings = 1;
1056                 }
1057                 /* Allocate dsp for in-band DTMF support */
1058                 if (pvt->options.dtmfmode & H323_DTMF_INBAND) {
1059                         pvt->vad = ast_dsp_new();
1060                         ast_dsp_set_features(pvt->vad, DSP_FEATURE_DTMF_DETECT);
1061                 }
1062                 /* Register channel functions. */
1063                 ch->tech_pvt = pvt;
1064                 /* Set the owner of this channel */
1065                 pvt->owner = ch;
1066
1067                 ast_copy_string(ch->context, pvt->context, sizeof(ch->context));
1068                 ast_copy_string(ch->exten, pvt->exten, sizeof(ch->exten));
1069                 ch->priority = 1;
1070                 if (!ast_strlen_zero(pvt->accountcode)) {
1071                         ast_string_field_set(ch, accountcode, pvt->accountcode);
1072                 }
1073                 if (pvt->amaflags) {
1074                         ch->amaflags = pvt->amaflags;
1075                 }
1076
1077                 /* Don't use ast_set_callerid() here because it will
1078                  * generate a needless NewCallerID event */
1079                 ch->cid.cid_num = ast_strdup(cid_num);
1080                 ch->cid.cid_ani = ast_strdup(cid_num);
1081                 ch->cid.cid_name = ast_strdup(cid_name);
1082
1083                 if (pvt->cd.redirect_reason >= 0) {
1084                         ch->cid.cid_rdnis = ast_strdup(pvt->cd.redirect_number);
1085                         pbx_builtin_setvar_helper(ch, "PRIREDIRECTREASON", redirectingreason2str(pvt->cd.redirect_reason));
1086                 }
1087                 ch->cid.cid_pres = pvt->cd.presentation;
1088                 ch->cid.cid_ton = pvt->cd.type_of_number;
1089
1090                 if (!ast_strlen_zero(pvt->exten) && strcmp(pvt->exten, "s")) {
1091                         ch->cid.cid_dnid = strdup(pvt->exten);
1092                 }
1093                 if (pvt->cd.transfer_capability >= 0)
1094                         ch->transfercapability = pvt->cd.transfer_capability;
1095                 if (state != AST_STATE_DOWN) {
1096                         if (ast_pbx_start(ch)) {
1097                                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", ch->name);
1098                                 ast_hangup(ch);
1099                                 ch = NULL;
1100                         }
1101                 }
1102         } else {
1103                 ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
1104         }
1105         return ch;
1106 }
1107
1108 static struct oh323_pvt *oh323_alloc(int callid)
1109 {
1110         struct oh323_pvt *pvt;
1111
1112         pvt = (struct oh323_pvt *) malloc(sizeof(struct oh323_pvt));
1113         if (!pvt) {
1114                 ast_log(LOG_ERROR, "Couldn't allocate private structure. This is bad\n");
1115                 return NULL;
1116         }
1117         memset(pvt, 0, sizeof(struct oh323_pvt));
1118         pvt->cd.redirect_reason = -1;
1119         pvt->cd.transfer_capability = -1;
1120         /* Ensure the call token is allocated for outgoing call */
1121         if (!callid) {
1122                 if ((pvt->cd).call_token == NULL) {
1123                         (pvt->cd).call_token = (char *)malloc(128);
1124                 }
1125                 if (!pvt->cd.call_token) {
1126                         ast_log(LOG_ERROR, "Not enough memory to alocate call token\n");
1127                         ast_rtp_destroy(pvt->rtp);
1128                         free(pvt);
1129                         return NULL;
1130                 }
1131                 memset((char *)(pvt->cd).call_token, 0, 128);
1132                 pvt->cd.call_reference = callid;
1133         }
1134         memcpy(&pvt->options, &global_options, sizeof(pvt->options));
1135         pvt->jointcapability = pvt->options.capability;
1136         if (pvt->options.dtmfmode & (H323_DTMF_RFC2833 | H323_DTMF_CISCO)) {
1137                 pvt->nonCodecCapability |= AST_RTP_DTMF;
1138         } else {
1139                 pvt->nonCodecCapability &= ~AST_RTP_DTMF;
1140         }
1141         ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
1142         pvt->newstate = pvt->newcontrol = pvt->newdigit = pvt->update_rtp_info = pvt->DTMFsched = -1;
1143         ast_mutex_init(&pvt->lock);
1144         /* Add to interface list */
1145         ast_mutex_lock(&iflock);
1146         pvt->next = iflist;
1147         iflist = pvt;
1148         ast_mutex_unlock(&iflock);
1149         return pvt;
1150 }
1151
1152 static struct oh323_pvt *find_call_locked(int call_reference, const char *token)
1153 {
1154         struct oh323_pvt *pvt;
1155
1156         ast_mutex_lock(&iflock);
1157         pvt = iflist;
1158         while(pvt) {
1159                 if (!pvt->needdestroy && ((signed int)pvt->cd.call_reference == call_reference)) {
1160                         /* Found the call */
1161                         if ((token != NULL) && (!strcmp(pvt->cd.call_token, token))) {
1162                                 ast_mutex_lock(&pvt->lock);
1163                                 ast_mutex_unlock(&iflock);
1164                                 return pvt;
1165                         } else if (token == NULL) {
1166                                 ast_log(LOG_WARNING, "Call Token is NULL\n");
1167                                 ast_mutex_lock(&pvt->lock);
1168                                 ast_mutex_unlock(&iflock);
1169                                 return pvt;
1170                         }
1171                 }
1172                 pvt = pvt->next;
1173         }
1174         ast_mutex_unlock(&iflock);
1175         return NULL;
1176 }
1177
1178 static int update_state(struct oh323_pvt *pvt, int state, int signal)
1179 {
1180         if (!pvt)
1181                 return 0;
1182         if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
1183                 if (state >= 0)
1184                         ast_setstate(pvt->owner, state);
1185                 if (signal >= 0)
1186                         ast_queue_control(pvt->owner, signal);
1187                 ast_channel_unlock(pvt->owner);
1188                 return 1;
1189         }
1190         else {
1191                 if (state >= 0)
1192                         pvt->newstate = state;
1193                 if (signal >= 0)
1194                         pvt->newcontrol = signal;
1195                 return 0;
1196         }
1197 }
1198
1199 static struct oh323_alias *build_alias(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
1200 {
1201         struct oh323_alias *alias;
1202         int found = 0;
1203
1204         alias = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&aliasl, name, name, 0, 0, strcasecmp);
1205
1206         if (alias)
1207                 found++;
1208         else {
1209                 if (!(alias = (struct oh323_alias *)calloc(1, sizeof(*alias))))
1210                         return NULL;
1211                 ASTOBJ_INIT(alias);
1212         }
1213         if (!found && name)
1214                 ast_copy_string(alias->name, name, sizeof(alias->name));
1215         for (; v || ((v = alt) && !(alt = NULL)); v = v->next) {
1216                 if (!strcasecmp(v->name, "e164")) {
1217                         ast_copy_string(alias->e164, v->value, sizeof(alias->e164));
1218                 } else if (!strcasecmp(v->name, "prefix")) {
1219                         ast_copy_string(alias->prefix, v->value, sizeof(alias->prefix));
1220                 } else if (!strcasecmp(v->name, "context")) {
1221                         ast_copy_string(alias->context, v->value, sizeof(alias->context));
1222                 } else if (!strcasecmp(v->name, "secret")) {
1223                         ast_copy_string(alias->secret, v->value, sizeof(alias->secret));
1224                 } else {
1225                         if (strcasecmp(v->value, "h323")) {
1226                                 ast_log(LOG_WARNING, "Keyword %s does not make sense in type=h323\n", v->name);
1227                         }
1228                 }
1229         }
1230         ASTOBJ_UNMARK(alias);
1231         return alias;
1232 }
1233
1234 static struct oh323_alias *realtime_alias(const char *alias)
1235 {
1236         struct ast_variable *var, *tmp;
1237         struct oh323_alias *a;
1238
1239         var = ast_load_realtime("h323", "name", alias, NULL);
1240
1241         if (!var)
1242                 return NULL;
1243
1244         for (tmp = var; tmp; tmp = tmp->next) {
1245                 if (!strcasecmp(tmp->name, "type") &&
1246                 !(!strcasecmp(tmp->value, "alias") || !strcasecmp(tmp->value, "h323"))) {
1247                         ast_variables_destroy(var);
1248                         return NULL;
1249                 }
1250         }
1251
1252         a = build_alias(alias, var, NULL, 1);
1253
1254         ast_variables_destroy(var);
1255
1256         return a;
1257 }
1258
1259 static int update_common_options(struct ast_variable *v, struct call_options *options)
1260 {
1261         int tmp;
1262         char *val, *opt;
1263
1264         if (!strcasecmp(v->name, "allow")) {
1265                 ast_parse_allow_disallow(&options->prefs, &options->capability, v->value, 1);
1266         } else if (!strcasecmp(v->name, "disallow")) {
1267                 ast_parse_allow_disallow(&options->prefs, &options->capability, v->value, 0);
1268         } else if (!strcasecmp(v->name, "dtmfmode")) {
1269                 val = ast_strdupa(v->value);
1270                 if ((opt = strchr(val, ':')) != (char *)NULL) {
1271                         *opt++ = '\0';
1272                         tmp = atoi(opt);
1273                 }
1274                 if (!strcasecmp(v->value, "inband")) {
1275                         options->dtmfmode |= H323_DTMF_INBAND;
1276                 } else if (!strcasecmp(val, "rfc2833")) {
1277                         options->dtmfmode |= H323_DTMF_RFC2833;
1278                         if (!opt) {
1279                                 options->dtmfcodec[0] = H323_DTMF_RFC2833_PT;
1280                         } else if ((tmp >= 96) && (tmp < 128)) {
1281                                 options->dtmfcodec[0] = tmp;
1282                         } else {
1283                                 options->dtmfcodec[0] = H323_DTMF_RFC2833_PT;
1284                                 ast_log(LOG_WARNING, "Unknown rfc2833 payload %s specified at line %d, using default %d\n", opt, v->lineno, options->dtmfcodec[0]);
1285                         }
1286                 } else if (!strcasecmp(val, "cisco")) {
1287                         options->dtmfmode |= H323_DTMF_CISCO;
1288                         if (!opt) {
1289                                 options->dtmfcodec[1] = H323_DTMF_CISCO_PT;
1290                         } else if ((tmp >= 96) && (tmp < 128)) {
1291                                 options->dtmfcodec[1] = tmp;
1292                         } else {
1293                                 options->dtmfcodec[1] = H323_DTMF_CISCO_PT;
1294                                 ast_log(LOG_WARNING, "Unknown Cisco DTMF payload %s specified at line %d, using default %d\n", opt, v->lineno, options->dtmfcodec[1]);
1295                         }
1296                 } else if (!strcasecmp(v->value, "h245-signal")) {
1297                         options->dtmfmode |= H323_DTMF_SIGNAL;
1298                 } else {
1299                         ast_log(LOG_WARNING, "Unknown dtmf mode '%s' at line %d\n", v->value, v->lineno);
1300                 }
1301         } else if (!strcasecmp(v->name, "dtmfcodec")) {
1302                 ast_log(LOG_NOTICE, "Option %s at line %d is deprecated. Use dtmfmode=rfc2833[:<payload>] instead.\n", v->name, v->lineno);
1303                 tmp = atoi(v->value);
1304                 if (tmp < 96)
1305                         ast_log(LOG_WARNING, "Invalid %s value %s at line %d\n", v->name, v->value, v->lineno);
1306                 else
1307                         options->dtmfcodec[0] = tmp;
1308         } else if (!strcasecmp(v->name, "bridge")) {
1309                 options->bridge = ast_true(v->value);
1310         } else if (!strcasecmp(v->name, "nat")) {
1311                 options->nat = ast_true(v->value);
1312         } else if (!strcasecmp(v->name, "fastStart")) {
1313                 options->fastStart = ast_true(v->value);
1314         } else if (!strcasecmp(v->name, "h245Tunneling")) {
1315                 options->h245Tunneling = ast_true(v->value);
1316         } else if (!strcasecmp(v->name, "silenceSuppression")) {
1317                 options->silenceSuppression = ast_true(v->value);
1318         } else if (!strcasecmp(v->name, "progress_setup")) {
1319                 tmp = atoi(v->value);
1320                 if ((tmp != 0) && (tmp != 1) && (tmp != 3) && (tmp != 8)) {
1321                         ast_log(LOG_WARNING, "Invalid value %s for %s at line %d, assuming 0\n", v->value, v->name, v->lineno);
1322                         tmp = 0;
1323                 }
1324                 options->progress_setup = tmp;
1325         } else if (!strcasecmp(v->name, "progress_alert")) {
1326                 tmp = atoi(v->value);
1327                 if ((tmp != 0) && (tmp != 1) && (tmp != 8)) {
1328                         ast_log(LOG_WARNING, "Invalid value %s for %s at line %d, assuming 0\n", v->value, v->name, v->lineno);
1329                         tmp = 0;
1330                 }
1331                 options->progress_alert = tmp;
1332         } else if (!strcasecmp(v->name, "progress_audio")) {
1333                 options->progress_audio = ast_true(v->value);
1334         } else if (!strcasecmp(v->name, "callerid")) {
1335                 ast_callerid_split(v->value, options->cid_name, sizeof(options->cid_name), options->cid_num, sizeof(options->cid_num));
1336         } else if (!strcasecmp(v->name, "fullname")) {
1337                 ast_copy_string(options->cid_name, v->value, sizeof(options->cid_name));
1338         } else if (!strcasecmp(v->name, "cid_number")) {
1339                 ast_copy_string(options->cid_num, v->value, sizeof(options->cid_num));
1340         } else if (!strcasecmp(v->name, "tunneling")) {
1341                 if (!strcasecmp(v->value, "none"))
1342                         options->tunnelOptions = 0;
1343                 else if (!strcasecmp(v->value, "cisco"))
1344                         options->tunnelOptions |= H323_TUNNEL_CISCO;
1345                 else if (!strcasecmp(v->value, "qsig"))
1346                         options->tunnelOptions |= H323_TUNNEL_QSIG;
1347                 else
1348                         ast_log(LOG_WARNING, "Invalid value %s for %s at line %d\n", v->value, v->name, v->lineno);
1349         } else if (!strcasecmp(v->name, "hold")) {
1350                 if (!strcasecmp(v->value, "none"))
1351                         options->holdHandling = ~0;
1352                 else if (!strcasecmp(v->value, "notify"))
1353                         options->holdHandling |= H323_HOLD_NOTIFY;
1354                 else if (!strcasecmp(v->value, "q931only"))
1355                         options->holdHandling |= H323_HOLD_NOTIFY | H323_HOLD_Q931ONLY;
1356                 else if (!strcasecmp(v->value, "h450"))
1357                         options->holdHandling |= H323_HOLD_H450;
1358                 else
1359                         ast_log(LOG_WARNING, "Invalid value %s for %s at line %d\n", v->value, v->name, v->lineno);
1360         } else
1361                 return 1;
1362
1363         return 0;
1364 }
1365
1366 static struct oh323_user *build_user(char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
1367 {
1368         struct oh323_user *user;
1369         struct ast_ha *oldha;
1370         int found = 0;
1371         int format;
1372
1373         user = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&userl, name, name, 0, 0, strcmp);
1374
1375         if (user)
1376                 found++;
1377         else {
1378                 if (!(user = (struct oh323_user *)calloc(1, sizeof(*user))))
1379                         return NULL;
1380                 ASTOBJ_INIT(user);
1381         }
1382         oldha = user->ha;
1383         user->ha = (struct ast_ha *)NULL;
1384         memcpy(&user->options, &global_options, sizeof(user->options));
1385         user->options.dtmfmode = 0;
1386         user->options.holdHandling = 0;
1387         /* Set default context */
1388         ast_copy_string(user->context, default_context, sizeof(user->context));
1389         if (user && !found)
1390                 ast_copy_string(user->name, name, sizeof(user->name));
1391
1392 #if 0 /* XXX Port channel variables functionality from chan_sip XXX */
1393         if (user->chanvars) {
1394                 ast_variables_destroy(user->chanvars);
1395                 user->chanvars = NULL;
1396         }
1397 #endif
1398
1399         for (; v || ((v = alt) && !(alt = NULL)); v = v->next) {
1400                 if (!update_common_options(v, &user->options))
1401                         continue;
1402                 if (!strcasecmp(v->name, "context")) {
1403                         ast_copy_string(user->context, v->value, sizeof(user->context));
1404                 } else if (!strcasecmp(v->name, "secret")) {
1405                         ast_copy_string(user->secret, v->value, sizeof(user->secret));
1406                 } else if (!strcasecmp(v->name, "accountcode")) {
1407                         ast_copy_string(user->accountcode, v->value, sizeof(user->accountcode));
1408                 } else if (!strcasecmp(v->name, "host")) {
1409                         if (!strcasecmp(v->value, "dynamic")) {
1410                                 ast_log(LOG_ERROR, "A dynamic host on a type=user does not make any sense\n");
1411                                 ASTOBJ_UNREF(user, oh323_destroy_user);
1412                                 return NULL;
1413                         } else if (ast_get_ip(&user->addr, v->value)) {
1414                                 ASTOBJ_UNREF(user, oh323_destroy_user);
1415                                 return NULL;
1416                         }
1417                         /* Let us know we need to use ip authentication */
1418                         user->host = 1;
1419                 } else if (!strcasecmp(v->name, "amaflags")) {
1420                         format = ast_cdr_amaflags2int(v->value);
1421                         if (format < 0) {
1422                                 ast_log(LOG_WARNING, "Invalid AMA Flags: %s at line %d\n", v->value, v->lineno);
1423                         } else {
1424                                 user->amaflags = format;
1425                         }
1426                 } else if (!strcasecmp(v->name, "permit") ||
1427                                         !strcasecmp(v->name, "deny")) {
1428                         user->ha = ast_append_ha(v->name, v->value, user->ha);
1429                 }
1430         }
1431         if (!user->options.dtmfmode)
1432                 user->options.dtmfmode = global_options.dtmfmode;
1433         if (user->options.holdHandling == ~0)
1434                 user->options.holdHandling = 0;
1435         else if (!user->options.holdHandling)
1436                 user->options.holdHandling = global_options.holdHandling;
1437         ASTOBJ_UNMARK(user);
1438         ast_free_ha(oldha);
1439         return user;
1440 }
1441
1442 static struct oh323_user *realtime_user(const call_details_t *cd)
1443 {
1444         struct ast_variable *var, *tmp;
1445         struct oh323_user *user;
1446         char *username;
1447
1448         if (userbyalias)
1449                 var = ast_load_realtime("h323", "name", username = cd->call_source_aliases, NULL);
1450         else {
1451                 username = (char *)NULL;
1452                 var = ast_load_realtime("h323", "host", cd->sourceIp, NULL);
1453         }
1454
1455         if (!var)
1456                 return NULL;
1457
1458         for (tmp = var; tmp; tmp = tmp->next) {
1459                 if (!strcasecmp(tmp->name, "type") &&
1460                 !(!strcasecmp(tmp->value, "user") || !strcasecmp(tmp->value, "friend"))) {
1461                         ast_variables_destroy(var);
1462                         return NULL;
1463                 } else if (!username && !strcasecmp(tmp->name, "name"))
1464                         username = tmp->value;
1465         }
1466
1467         if (!username) {
1468                 ast_log(LOG_WARNING, "Cannot determine user name for IP address %s\n", cd->sourceIp);
1469                 ast_variables_destroy(var);
1470                 return NULL;
1471         }
1472
1473         user = build_user(username, var, NULL, 1);
1474
1475         ast_variables_destroy(var);
1476
1477         return user;
1478 }
1479
1480 static struct oh323_peer *build_peer(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
1481 {
1482         struct oh323_peer *peer;
1483         struct ast_ha *oldha;
1484         int found = 0;
1485
1486         peer = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&peerl, name, name, 0, 0, strcmp);
1487
1488         if (peer)
1489                 found++;
1490         else {
1491                 if (!(peer = (struct oh323_peer*)calloc(1, sizeof(*peer))))
1492                         return NULL;
1493                 ASTOBJ_INIT(peer);
1494         }
1495         oldha = peer->ha;
1496         peer->ha = NULL;
1497         memcpy(&peer->options, &global_options, sizeof(peer->options));
1498         peer->options.dtmfmode = 0;
1499         peer->options.holdHandling = 0;
1500         peer->addr.sin_port = htons(h323_signalling_port);
1501         peer->addr.sin_family = AF_INET;
1502         if (!found && name)
1503                 ast_copy_string(peer->name, name, sizeof(peer->name));
1504
1505 #if 0 /* XXX Port channel variables functionality from chan_sip XXX */
1506         if (peer->chanvars) {
1507                 ast_variables_destroy(peer->chanvars);
1508                 peer->chanvars = NULL;
1509         }
1510 #endif
1511         /* Default settings for mailbox */
1512         peer->mailbox[0] = '\0';
1513
1514         for (; v || ((v = alt) && !(alt = NULL)); v = v->next) {
1515                 if (!update_common_options(v, &peer->options))
1516                         continue;
1517                 if (!strcasecmp(v->name, "host")) {
1518                         if (!strcasecmp(v->value, "dynamic")) {
1519                                 ast_log(LOG_ERROR, "Dynamic host configuration not implemented.\n");
1520                                 ASTOBJ_UNREF(peer, oh323_destroy_peer);
1521                                 return NULL;
1522                         }
1523                         if (ast_get_ip(&peer->addr, v->value)) {
1524                                 ast_log(LOG_ERROR, "Could not determine IP for %s\n", v->value);
1525                                 ASTOBJ_UNREF(peer, oh323_destroy_peer);
1526                                 return NULL;
1527                         }
1528                 } else if (!strcasecmp(v->name, "port")) {
1529                         peer->addr.sin_port = htons(atoi(v->value));
1530                 } else if (!strcasecmp(v->name, "permit") ||
1531                                         !strcasecmp(v->name, "deny")) {
1532                         peer->ha = ast_append_ha(v->name, v->value, peer->ha);
1533                 } else if (!strcasecmp(v->name, "mailbox")) {
1534                         ast_copy_string(peer->mailbox, v->value, sizeof(peer->mailbox));
1535                 }
1536         }
1537         if (!peer->options.dtmfmode)
1538                 peer->options.dtmfmode = global_options.dtmfmode;
1539         if (peer->options.holdHandling == ~0)
1540                 peer->options.holdHandling = 0;
1541         else if (!peer->options.holdHandling)
1542                 peer->options.holdHandling = global_options.holdHandling;
1543         ASTOBJ_UNMARK(peer);
1544         ast_free_ha(oldha);
1545         return peer;
1546 }
1547
1548 static struct oh323_peer *realtime_peer(const char *peername, struct sockaddr_in *sin)
1549 {
1550         struct oh323_peer *peer;
1551         struct ast_variable *var;
1552         struct ast_variable *tmp;
1553         const char *addr;
1554
1555         /* First check on peer name */
1556         if (peername)
1557                 var = ast_load_realtime("h323", "name", peername, addr = NULL);
1558         else if (sin) /* Then check on IP address for dynamic peers */
1559                 var = ast_load_realtime("h323", "host", addr = ast_inet_ntoa(sin->sin_addr), NULL);
1560         else
1561                 return NULL;
1562
1563         if (!var)
1564                 return NULL;
1565
1566         for (tmp = var; tmp; tmp = tmp->next) {
1567                 /* If this is type=user, then skip this object. */
1568                 if (!strcasecmp(tmp->name, "type") &&
1569                                 !(!strcasecmp(tmp->value, "peer") || !strcasecmp(tmp->value, "friend"))) {
1570                         ast_variables_destroy(var);
1571                         return NULL;
1572                 } else if (!peername && !strcasecmp(tmp->name, "name")) {
1573                         peername = tmp->value;
1574                 }
1575         }
1576
1577         if (!peername) {        /* Did not find peer in realtime */
1578                 ast_log(LOG_WARNING, "Cannot determine peer name for IP address %s\n", addr);
1579                 ast_variables_destroy(var);
1580                 return NULL;
1581         }
1582
1583         /* Peer found in realtime, now build it in memory */
1584         peer = build_peer(peername, var, NULL, 1);
1585
1586         ast_variables_destroy(var);
1587
1588         return peer;
1589 }
1590
1591 static int oh323_addrcmp_str(struct in_addr inaddr, char *addr)
1592 {
1593         return strcmp(ast_inet_ntoa(inaddr), addr);
1594 }
1595
1596 static struct oh323_user *find_user(const call_details_t *cd, int realtime)
1597 {
1598         struct oh323_user *u;
1599
1600         if (userbyalias)
1601                 u = ASTOBJ_CONTAINER_FIND(&userl, cd->call_source_aliases);
1602         else
1603                 u = ASTOBJ_CONTAINER_FIND_FULL(&userl, cd->sourceIp, addr.sin_addr, 0, 0, oh323_addrcmp_str);
1604
1605         if (!u && realtime)
1606                 u = realtime_user(cd);
1607
1608         if (!u && h323debug)
1609                 ast_log(LOG_DEBUG, "Could not find user by name %s or address %s\n", cd->call_source_aliases, cd->sourceIp);
1610
1611         return u;
1612 }
1613
1614 static int oh323_addrcmp(struct sockaddr_in addr, struct sockaddr_in *sin)
1615 {
1616         int res;
1617
1618         if (!sin)
1619                 res = -1;
1620         else
1621                 res = inaddrcmp(&addr , sin);
1622
1623         return res;
1624 }
1625
1626 static struct oh323_peer *find_peer(const char *peer, struct sockaddr_in *sin, int realtime)
1627 {
1628         struct oh323_peer *p;
1629
1630         if (peer)
1631                 p = ASTOBJ_CONTAINER_FIND(&peerl, peer);
1632         else
1633                 p = ASTOBJ_CONTAINER_FIND_FULL(&peerl, sin, addr, 0, 0, oh323_addrcmp);
1634
1635         if (!p && realtime)
1636                 p = realtime_peer(peer, sin);
1637
1638         if (!p && h323debug)
1639                 ast_log(LOG_DEBUG, "Could not find peer by name %s or address %s\n", (peer ? peer : "<NONE>"), (sin ? ast_inet_ntoa(sin->sin_addr) : "<NONE>"));
1640
1641         return p;
1642 }
1643
1644 static int create_addr(struct oh323_pvt *pvt, char *opeer)
1645 {
1646         struct hostent *hp;
1647         struct ast_hostent ahp;
1648         struct oh323_peer *p;
1649         int portno;
1650         int found = 0;
1651         char *port;
1652         char *hostn;
1653         char peer[256] = "";
1654
1655         ast_copy_string(peer, opeer, sizeof(peer));
1656         port = strchr(peer, ':');
1657         if (port) {
1658                 *port = '\0';
1659                 port++;
1660         }
1661         pvt->sa.sin_family = AF_INET;
1662         p = find_peer(peer, NULL, 1);
1663         if (p) {
1664                 found++;
1665                 memcpy(&pvt->options, &p->options, sizeof(pvt->options));
1666                 pvt->jointcapability = pvt->options.capability;
1667                 if (pvt->options.dtmfmode) {
1668                         if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
1669                                 pvt->nonCodecCapability |= AST_RTP_DTMF;
1670                         } else {
1671                                 pvt->nonCodecCapability &= ~AST_RTP_DTMF;
1672                         }
1673                 }
1674                 if (p->addr.sin_addr.s_addr) {
1675                         pvt->sa.sin_addr = p->addr.sin_addr;
1676                         pvt->sa.sin_port = p->addr.sin_port;
1677                 }
1678                 ASTOBJ_UNREF(p, oh323_destroy_peer);
1679         }
1680         if (!p && !found) {
1681                 hostn = peer;
1682                 if (port) {
1683                         portno = atoi(port);
1684                 } else {
1685                         portno = h323_signalling_port;
1686                 }
1687                 hp = ast_gethostbyname(hostn, &ahp);
1688                 if (hp) {
1689                         memcpy(&pvt->sa.sin_addr, hp->h_addr, sizeof(pvt->sa.sin_addr));
1690                         pvt->sa.sin_port = htons(portno);
1691                         /* Look peer by address */
1692                         p = find_peer(NULL, &pvt->sa, 1);
1693                         memcpy(&pvt->options, (p ? &p->options : &global_options), sizeof(pvt->options));
1694                         pvt->jointcapability = pvt->options.capability;
1695                         if (p) {
1696                                 ASTOBJ_UNREF(p, oh323_destroy_peer);
1697                         }
1698                         if (pvt->options.dtmfmode) {
1699                                 if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
1700                                         pvt->nonCodecCapability |= AST_RTP_DTMF;
1701                                 } else {
1702                                         pvt->nonCodecCapability &= ~AST_RTP_DTMF;
1703                                 }
1704                         }
1705                         return 0;
1706                 } else {
1707                         ast_log(LOG_WARNING, "No such host: %s\n", peer);
1708                         return -1;
1709                 }
1710         } else if (!found) {
1711                 return -1;
1712         } else {
1713                 return 0;
1714         }
1715 }
1716 static struct ast_channel *oh323_request(const char *type, int format, void *data, int *cause)
1717 {
1718         int oldformat;
1719         struct oh323_pvt *pvt;
1720         struct ast_channel *tmpc = NULL;
1721         char *dest = (char *)data;
1722         char *ext, *host;
1723         char *h323id = NULL;
1724         char tmp[256], tmp1[256];
1725
1726         if (h323debug)
1727                 ast_log(LOG_DEBUG, "type=%s, format=%d, data=%s.\n", type, format, (char *)data);
1728
1729         pvt = oh323_alloc(0);
1730         if (!pvt) {
1731                 ast_log(LOG_WARNING, "Unable to build pvt data for '%s'\n", (char *)data);
1732                 return NULL;
1733         }
1734         oldformat = format;
1735         format &= ((AST_FORMAT_MAX_AUDIO << 1) - 1);
1736         if (!format) {
1737                 ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", format);
1738                 oh323_destroy(pvt);
1739                 if (cause)
1740                         *cause = AST_CAUSE_INCOMPATIBLE_DESTINATION;
1741                 return NULL;
1742         }
1743         ast_copy_string(tmp, dest, sizeof(tmp));
1744         host = strchr(tmp, '@');
1745         if (host) {
1746                 *host = '\0';
1747                 host++;
1748                 ext = tmp;
1749         } else {
1750                 ext = strrchr(tmp, '/');
1751                 if (ext)
1752                         *ext++ = '\0';
1753                 host = tmp;
1754         }
1755         strtok_r(host, "/", &(h323id));
1756         if (!ast_strlen_zero(h323id)) {
1757                 h323_set_id(h323id);
1758         }
1759         if (ext) {
1760                 ast_copy_string(pvt->exten, ext, sizeof(pvt->exten));
1761         }
1762         if (h323debug)
1763                 ast_log(LOG_DEBUG, "Extension: %s Host: %s\n", pvt->exten, host);
1764
1765         if (gatekeeper_disable) {
1766                 if (create_addr(pvt, host)) {
1767                         oh323_destroy(pvt);
1768                         if (cause)
1769                                 *cause = AST_CAUSE_DESTINATION_OUT_OF_ORDER;
1770                         return NULL;
1771                 }
1772         }
1773         else {
1774                 memcpy(&pvt->options, &global_options, sizeof(pvt->options));
1775                 pvt->jointcapability = pvt->options.capability;
1776                 if (pvt->options.dtmfmode) {
1777                         if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
1778                                 pvt->nonCodecCapability |= AST_RTP_DTMF;
1779                         } else {
1780                                 pvt->nonCodecCapability &= ~AST_RTP_DTMF;
1781                         }
1782                 }
1783         }
1784
1785         ast_mutex_lock(&caplock);
1786         /* Generate unique channel identifier */
1787         snprintf(tmp1, sizeof(tmp1)-1, "%s-%u", host, ++unique);
1788         tmp1[sizeof(tmp1)-1] = '\0';
1789         ast_mutex_unlock(&caplock);
1790
1791         ast_mutex_lock(&pvt->lock);
1792         tmpc = __oh323_new(pvt, AST_STATE_DOWN, tmp1);
1793         ast_mutex_unlock(&pvt->lock);
1794         if (!tmpc) {
1795                 oh323_destroy(pvt);
1796                 if (cause)
1797                         *cause = AST_CAUSE_NORMAL_TEMPORARY_FAILURE;
1798         }
1799         ast_update_use_count();
1800         restart_monitor();
1801         return tmpc;
1802 }
1803
1804 /** Find a call by alias */
1805 static struct oh323_alias *find_alias(const char *source_aliases, int realtime)
1806 {
1807         struct oh323_alias *a;
1808
1809         a = ASTOBJ_CONTAINER_FIND(&aliasl, source_aliases);
1810
1811         if (!a && realtime)
1812                 a = realtime_alias(source_aliases);
1813
1814         return a;
1815 }
1816
1817 /**
1818   * Callback for sending digits from H.323 up to asterisk
1819   *
1820   */
1821 static int receive_digit(unsigned call_reference, char digit, const char *token, int duration)
1822 {
1823         struct oh323_pvt *pvt;
1824         int res;
1825
1826         pvt = find_call_locked(call_reference, token);
1827         if (!pvt) {
1828                 ast_log(LOG_ERROR, "Received digit '%c' (%u ms) for call %s without private structure\n", digit, duration, token);
1829                 return -1;
1830         }
1831         if (h323debug)
1832                 ast_log(LOG_DTMF, "Received %s digit '%c' (%u ms) for call %s\n", (digit == ' ' ? "update for" : "new"), (digit == ' ' ? pvt->curDTMF : digit), duration, token);
1833
1834         if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
1835                 if (digit == '!')
1836                         res = ast_queue_control(pvt->owner, AST_CONTROL_FLASH);
1837                 else {
1838                         struct ast_frame f = {
1839                                 .frametype = AST_FRAME_DTMF_END,
1840                                 .subclass = digit,
1841                                 .samples = duration * 8,
1842                                 .src = "SEND_DIGIT",
1843                         };
1844                         if (digit == ' ') {             /* signalUpdate message */
1845                                 f.subclass = pvt->curDTMF;
1846                                 if (pvt->DTMFsched >= 0) {
1847                                         ast_sched_del(sched, pvt->DTMFsched);
1848                                         pvt->DTMFsched = -1;
1849                                 }
1850                         } else {                                /* Regular input or signal message */
1851                                 if (duration) {         /* This is a signal, signalUpdate follows */
1852                                         f.frametype = AST_FRAME_DTMF_BEGIN;
1853                                         if (pvt->DTMFsched >= 0)
1854                                                 ast_sched_del(sched, pvt->DTMFsched);
1855                                         pvt->DTMFsched = ast_sched_add(sched, duration, oh323_simulate_dtmf_end, pvt);
1856                                         if (h323debug)
1857                                                 ast_log(LOG_DTMF, "Scheduled DTMF END simulation for %d ms, id=%d\n", duration, pvt->DTMFsched);
1858                                 }
1859                                 pvt->curDTMF = digit;
1860                         }
1861                         res = ast_queue_frame(pvt->owner, &f);
1862                 }
1863                 ast_channel_unlock(pvt->owner);
1864         } else {
1865                 if (digit == '!')
1866                         pvt->newcontrol = AST_CONTROL_FLASH;
1867                 else {
1868                         pvt->newduration = duration;
1869                         pvt->newdigit = digit;
1870                 }
1871                 res = 0;
1872         }
1873         ast_mutex_unlock(&pvt->lock);
1874         return res;
1875 }
1876
1877 /**
1878   * Callback function used to inform the H.323 stack of the local rtp ip/port details
1879   *
1880   * Returns the local RTP information
1881   */
1882 static struct rtp_info *external_rtp_create(unsigned call_reference, const char * token)
1883 {
1884         struct oh323_pvt *pvt;
1885         struct sockaddr_in us;
1886         struct rtp_info *info;
1887
1888         info = (struct rtp_info *)malloc(sizeof(struct rtp_info));
1889         if (!info) {
1890                 ast_log(LOG_ERROR, "Unable to allocated info structure, this is very bad\n");
1891                 return NULL;
1892         }
1893         pvt = find_call_locked(call_reference, token);
1894         if (!pvt) {
1895                 free(info);
1896                 ast_log(LOG_ERROR, "Unable to find call %s(%d)\n", token, call_reference);
1897                 return NULL;
1898         }
1899         if (!pvt->rtp)
1900                 __oh323_rtp_create(pvt);
1901         if (!pvt->rtp) {
1902                 ast_mutex_unlock(&pvt->lock);
1903                 free(info);
1904                 ast_log(LOG_ERROR, "No RTP stream is available for call %s (%d)", token, call_reference);
1905                 return NULL;
1906         }
1907         /* figure out our local RTP port and tell the H.323 stack about it */
1908         ast_rtp_get_us(pvt->rtp, &us);
1909         ast_mutex_unlock(&pvt->lock);
1910
1911         ast_copy_string(info->addr, ast_inet_ntoa(us.sin_addr), sizeof(info->addr));
1912         info->port = ntohs(us.sin_port);
1913         if (h323debug)
1914                 ast_log(LOG_DEBUG, "Sending RTP 'US' %s:%d\n", info->addr, info->port);
1915         return info;
1916 }
1917
1918 /**
1919  * Definition taken from rtp.c for rtpPayloadType because we need it here.
1920  */
1921 struct rtpPayloadType {
1922         int isAstFormat;        /* whether the following code is an AST_FORMAT */
1923         int code;
1924 };
1925
1926 /**
1927   * Call-back function passing remote ip/port information from H.323 to asterisk
1928   *
1929   * Returns nothing
1930   */
1931 static void setup_rtp_connection(unsigned call_reference, const char *remoteIp, int remotePort, const char *token, int pt)
1932 {
1933         struct oh323_pvt *pvt;
1934         struct sockaddr_in them;
1935         struct rtpPayloadType rtptype;
1936         int nativeformats_changed;
1937         enum { NEED_NONE, NEED_HOLD, NEED_UNHOLD } rtp_change = NEED_NONE;
1938
1939         if (h323debug)
1940                 ast_log(LOG_DEBUG, "Setting up RTP connection for %s\n", token);
1941
1942         /* Find the call or allocate a private structure if call not found */
1943         pvt = find_call_locked(call_reference, token);
1944         if (!pvt) {
1945                 ast_log(LOG_ERROR, "Something is wrong: rtp\n");
1946                 return;
1947         }
1948         if (pvt->alreadygone) {
1949                 ast_mutex_unlock(&pvt->lock);
1950                 return;
1951         }
1952
1953         if (!pvt->rtp)
1954                 __oh323_rtp_create(pvt);
1955
1956         if ((pt == 2) && (pvt->jointcapability & AST_FORMAT_G726_AAL2)) {
1957                 ast_rtp_set_rtpmap_type(pvt->rtp, pt, "audio", "G726-32", AST_RTP_OPT_G726_NONSTANDARD);
1958         }
1959
1960         them.sin_family = AF_INET;
1961         /* only works for IPv4 */
1962         them.sin_addr.s_addr = inet_addr(remoteIp);
1963         them.sin_port = htons(remotePort);
1964
1965         if (them.sin_addr.s_addr) {
1966                 ast_rtp_set_peer(pvt->rtp, &them);
1967                 if (pvt->recvonly) {
1968                         pvt->recvonly = 0;
1969                         rtp_change = NEED_UNHOLD;
1970                 }
1971         } else {
1972                 ast_rtp_stop(pvt->rtp);
1973                 if (!pvt->recvonly) {
1974                         pvt->recvonly = 1;
1975                         rtp_change = NEED_HOLD;
1976                 }
1977         }
1978
1979         /* Change native format to reflect information taken from OLC/OLCAck */
1980         nativeformats_changed = 0;
1981         if (pt != 128 && pvt->rtp) {    /* Payload type is invalid, so try to use previously decided */
1982                 rtptype = ast_rtp_lookup_pt(pvt->rtp, pt);
1983                 if (h323debug)
1984                         ast_log(LOG_DEBUG, "Native format is set to %d from %d by RTP payload type %d\n", rtptype.code, pvt->nativeformats, pt);
1985                 if (pvt->nativeformats != rtptype.code) {
1986                         pvt->nativeformats = rtptype.code;
1987                         nativeformats_changed = 1;
1988                 }
1989         } else if (h323debug)
1990                 ast_log(LOG_NOTICE, "Payload type is unknown, formats isn't changed\n");
1991
1992         /* Don't try to lock the channel if nothing changed */
1993         if (nativeformats_changed || pvt->options.progress_audio || (rtp_change != NEED_NONE)) {
1994                 if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
1995                         /* Re-build translation path only if native format(s) has been changed */
1996                         if (pvt->owner->nativeformats != pvt->nativeformats) {
1997                                 if (h323debug)
1998                                         ast_log(LOG_DEBUG, "Native format changed to %d from %d, read format is %d, write format is %d\n", pvt->nativeformats, pvt->owner->nativeformats, pvt->owner->readformat, pvt->owner->writeformat);
1999                                 pvt->owner->nativeformats = pvt->nativeformats;
2000                                 ast_set_read_format(pvt->owner, pvt->owner->readformat);
2001                                 ast_set_write_format(pvt->owner, pvt->owner->writeformat);
2002                         }
2003                         if (pvt->options.progress_audio)
2004                                 ast_queue_control(pvt->owner, AST_CONTROL_PROGRESS);
2005                         switch (rtp_change) {
2006                         case NEED_HOLD:
2007                                 ast_queue_control(pvt->owner, AST_CONTROL_HOLD);
2008                                 break;
2009                         case NEED_UNHOLD:
2010                                 ast_queue_control(pvt->owner, AST_CONTROL_UNHOLD);
2011                                 break;
2012                         default:
2013                                 break;
2014                         }
2015                         ast_channel_unlock(pvt->owner);
2016                 }
2017                 else {
2018                         if (pvt->options.progress_audio)
2019                                 pvt->newcontrol = AST_CONTROL_PROGRESS;
2020                         else if (rtp_change == NEED_HOLD)
2021                                 pvt->newcontrol = AST_CONTROL_HOLD;
2022                         else if (rtp_change == NEED_UNHOLD)
2023                                 pvt->newcontrol = AST_CONTROL_UNHOLD;
2024                         if (h323debug)
2025                                 ast_log(LOG_DEBUG, "RTP connection preparation for %s is pending...\n", token);
2026                 }
2027         }
2028         ast_mutex_unlock(&pvt->lock);
2029
2030         if (h323debug)
2031                 ast_log(LOG_DEBUG, "RTP connection prepared for %s\n", token);
2032
2033         return;
2034 }
2035
2036 /**
2037   *     Call-back function to signal asterisk that the channel has been answered
2038   * Returns nothing
2039   */
2040 static void connection_made(unsigned call_reference, const char *token)
2041 {
2042         struct oh323_pvt *pvt;
2043
2044         if (h323debug)
2045                 ast_log(LOG_DEBUG, "Call %s answered\n", token);
2046
2047         pvt = find_call_locked(call_reference, token);
2048         if (!pvt) {
2049                 ast_log(LOG_ERROR, "Something is wrong: connection\n");
2050                 return;
2051         }
2052
2053         /* Inform asterisk about remote party connected only on outgoing calls */
2054         if (!pvt->outgoing) {
2055                 ast_mutex_unlock(&pvt->lock);
2056                 return;
2057         }
2058         /* Do not send ANSWER message more than once */
2059         if (!pvt->connection_established) {
2060                 pvt->connection_established = 1;
2061                 update_state(pvt, -1, AST_CONTROL_ANSWER);
2062         }
2063         ast_mutex_unlock(&pvt->lock);
2064         return;
2065 }
2066
2067 static int progress(unsigned call_reference, const char *token, int inband)
2068 {
2069         struct oh323_pvt *pvt;
2070
2071         if (h323debug)
2072                 ast_log(LOG_DEBUG, "Received ALERT/PROGRESS message for %s tones\n", (inband ? "inband" : "self-generated"));
2073
2074         pvt = find_call_locked(call_reference, token);
2075         if (!pvt) {
2076                 ast_log(LOG_ERROR, "Private structure not found in progress.\n");
2077                 return -1;
2078         }
2079         if (!pvt->owner) {
2080                 ast_mutex_unlock(&pvt->lock);
2081                 ast_log(LOG_ERROR, "No Asterisk channel associated with private structure.\n");
2082                 return -1;
2083         }
2084         update_state(pvt, -1, (inband ? AST_CONTROL_PROGRESS : AST_CONTROL_RINGING));
2085         ast_mutex_unlock(&pvt->lock);
2086
2087         return 0;
2088 }
2089
2090 /**
2091  *  Call-back function for incoming calls
2092  *
2093  *  Returns 1 on success
2094  */
2095 static call_options_t *setup_incoming_call(call_details_t *cd)
2096 {
2097         struct oh323_pvt *pvt;
2098         struct oh323_user *user = NULL;
2099         struct oh323_alias *alias = NULL;
2100
2101         if (h323debug)
2102                 ast_log(LOG_DEBUG, "Setting up incoming call for %s\n", cd->call_token);
2103
2104         /* allocate the call*/
2105         pvt = oh323_alloc(cd->call_reference);
2106
2107         if (!pvt) {
2108                 ast_log(LOG_ERROR, "Unable to allocate private structure, this is bad.\n");
2109                 cleanup_call_details(cd);
2110                 return NULL;
2111         }
2112
2113         /* Populate the call details in the private structure */
2114         memcpy(&pvt->cd, cd, sizeof(pvt->cd));
2115         memcpy(&pvt->options, &global_options, sizeof(pvt->options));
2116         pvt->jointcapability = pvt->options.capability;
2117
2118         if (h323debug) {
2119                 ast_verbose(VERBOSE_PREFIX_3 "Setting up Call\n");
2120                 ast_verbose(VERBOSE_PREFIX_3 " \tCall token:  [%s]\n", pvt->cd.call_token);
2121                 ast_verbose(VERBOSE_PREFIX_3 " \tCalling party name:  [%s]\n", pvt->cd.call_source_name);
2122                 ast_verbose(VERBOSE_PREFIX_3 " \tCalling party number:  [%s]\n", pvt->cd.call_source_e164);
2123                 ast_verbose(VERBOSE_PREFIX_3 " \tCalled party name:  [%s]\n", pvt->cd.call_dest_alias);
2124                 ast_verbose(VERBOSE_PREFIX_3 " \tCalled party number:  [%s]\n", pvt->cd.call_dest_e164);
2125                 if (pvt->cd.redirect_reason >= 0)
2126                         ast_verbose(VERBOSE_PREFIX_3 " \tRedirecting party number:  [%s] (reason %d)\n", pvt->cd.redirect_number, pvt->cd.redirect_reason);
2127                 ast_verbose(VERBOSE_PREFIX_3 " \tCalling party IP:  [%s]\n", pvt->cd.sourceIp);
2128         }
2129
2130         /* Decide if we are allowing Gatekeeper routed calls*/
2131         if ((!strcasecmp(cd->sourceIp, gatekeeper)) && (gkroute == -1) && !gatekeeper_disable) {
2132                 if (!ast_strlen_zero(cd->call_dest_e164)) {
2133                         ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
2134                         ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
2135                 } else {
2136                         alias = find_alias(cd->call_dest_alias, 1);
2137                         if (!alias) {
2138                                 ast_log(LOG_ERROR, "Call for %s rejected, alias not found\n", cd->call_dest_alias);
2139                                 oh323_destroy(pvt);
2140                                 return NULL;
2141                         }
2142                         ast_copy_string(pvt->exten, alias->name, sizeof(pvt->exten));
2143                         ast_copy_string(pvt->context, alias->context, sizeof(pvt->context));
2144                 }
2145         } else {
2146                 /* Either this call is not from the Gatekeeper
2147                    or we are not allowing gk routed calls */
2148                 user = find_user(cd, 1);
2149                 if (!user) {
2150                         if (!acceptAnonymous) {
2151                                 ast_log(LOG_NOTICE, "Anonymous call from '%s@%s' rejected\n", pvt->cd.call_source_aliases, pvt->cd.sourceIp);
2152                                 oh323_destroy(pvt);
2153                                 return NULL;
2154                         }
2155                         if (ast_strlen_zero(default_context)) {
2156                                 ast_log(LOG_ERROR, "Call from '%s@%s' rejected due to no default context\n", pvt->cd.call_source_aliases, pvt->cd.sourceIp);
2157                                 oh323_destroy(pvt);
2158                                 return NULL;
2159                         }
2160                         ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
2161                         if (!ast_strlen_zero(pvt->cd.call_dest_e164)) {
2162                                 ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
2163                         } else {
2164                                 ast_copy_string(pvt->exten, cd->call_dest_alias, sizeof(pvt->exten));
2165                         }
2166                         if (h323debug)
2167                                 ast_log(LOG_DEBUG, "Sending %s@%s to context [%s] extension %s\n", cd->call_source_aliases, cd->sourceIp, pvt->context, pvt->exten);
2168                 } else {
2169                         if (user->host) {
2170                                 if (strcasecmp(cd->sourceIp, ast_inet_ntoa(user->addr.sin_addr))) {
2171                                         if (ast_strlen_zero(user->context)) {
2172                                                 if (ast_strlen_zero(default_context)) {
2173                                                         ast_log(LOG_ERROR, "Call from '%s' rejected due to non-matching IP address (%s) and no default context\n", user->name, cd->sourceIp);
2174                                                         oh323_destroy(pvt);
2175                                                         ASTOBJ_UNREF(user, oh323_destroy_user);
2176                                                         return NULL;
2177                                                 }
2178                                                 ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
2179                                         } else {
2180                                                 ast_copy_string(pvt->context, user->context, sizeof(pvt->context));
2181                                         }
2182                                         pvt->exten[0] = 'i';
2183                                         pvt->exten[1] = '\0';
2184                                         ast_log(LOG_ERROR, "Call from '%s' rejected due to non-matching IP address (%s)s\n", user->name, cd->sourceIp);
2185                                         oh323_destroy(pvt);
2186                                         ASTOBJ_UNREF(user, oh323_destroy_user);
2187                                         return NULL;    /* XXX: Hmmm... Why to setup context if we drop connection immediately??? */
2188                                 }
2189                         }
2190                         ast_copy_string(pvt->context, user->context, sizeof(pvt->context));
2191                         memcpy(&pvt->options, &user->options, sizeof(pvt->options));
2192                         pvt->jointcapability = pvt->options.capability;
2193                         if (!ast_strlen_zero(pvt->cd.call_dest_e164)) {
2194                                 ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
2195                         } else {
2196                                 ast_copy_string(pvt->exten, cd->call_dest_alias, sizeof(pvt->exten));
2197                         }
2198                         if (!ast_strlen_zero(user->accountcode)) {
2199                                 ast_copy_string(pvt->accountcode, user->accountcode, sizeof(pvt->accountcode));
2200                         }
2201                         if (user->amaflags) {
2202                                 pvt->amaflags = user->amaflags;
2203                         }
2204                         ASTOBJ_UNREF(user, oh323_destroy_user);
2205                 }
2206         }
2207         return &pvt->options;
2208 }
2209
2210 /**
2211  * Call-back function to start PBX when OpenH323 ready to serve incoming call
2212  *
2213  * Returns 1 on success
2214  */
2215 static int answer_call(unsigned call_reference, const char *token)
2216 {
2217         struct oh323_pvt *pvt;
2218         struct ast_channel *c = NULL;
2219         enum {ext_original, ext_s, ext_i, ext_notexists} try_exten;
2220         char tmp_exten[sizeof(pvt->exten)];
2221
2222         if (h323debug)
2223                 ast_log(LOG_DEBUG, "Preparing Asterisk to answer for %s\n", token);
2224
2225         /* Find the call or allocate a private structure if call not found */
2226         pvt = find_call_locked(call_reference, token);
2227         if (!pvt) {
2228                 ast_log(LOG_ERROR, "Something is wrong: answer_call\n");
2229                 return 0;
2230         }
2231         /* Check if requested extension@context pair exists in the dialplan */
2232         ast_copy_string(tmp_exten, pvt->exten, sizeof(tmp_exten));
2233
2234         /* Try to find best extension in specified context */
2235         if ((tmp_exten[0] != '\0') && (tmp_exten[1] == '\0')) {
2236                 if (tmp_exten[0] == 's')
2237                         try_exten = ext_s;
2238                 else if (tmp_exten[0] == 'i')
2239                         try_exten = ext_i;
2240                 else
2241                         try_exten = ext_original;
2242         } else
2243                 try_exten = ext_original;
2244         do {
2245                 if (ast_exists_extension(NULL, pvt->context, tmp_exten, 1, NULL))
2246                         break;
2247                 switch (try_exten) {
2248                 case ext_original:
2249                         tmp_exten[0] = 's';
2250                         tmp_exten[1] = '\0';
2251                         try_exten = ext_s;
2252                         break;
2253                 case ext_s:
2254                         tmp_exten[0] = 'i';
2255                         try_exten = ext_i;
2256                         break;
2257                 case ext_i:
2258                         try_exten = ext_notexists;
2259                         break;
2260                 default:
2261                         break;
2262                 }
2263         } while (try_exten != ext_notexists);
2264
2265         /* Drop the call if we don't have <exten>, s and i extensions */
2266         if (try_exten == ext_notexists) {
2267                 ast_log(LOG_NOTICE, "Dropping call because extensions '%s', 's' and 'i' doesn't exists in context [%s]\n", pvt->exten, pvt->context);
2268                 ast_mutex_unlock(&pvt->lock);
2269                 h323_clear_call(token, AST_CAUSE_UNALLOCATED);
2270                 return 0;
2271         } else if ((try_exten != ext_original) && (strcmp(pvt->exten, tmp_exten) != 0)) {
2272                 if (h323debug)
2273                         ast_log(LOG_DEBUG, "Going to extension %s@%s because %s@%s isn't exists\n", tmp_exten, pvt->context, pvt->exten, pvt->context);
2274                 ast_copy_string(pvt->exten, tmp_exten, sizeof(pvt->exten));
2275         }
2276
2277         /* allocate a channel and tell asterisk about it */
2278         c = __oh323_new(pvt, AST_STATE_RINGING, pvt->cd.call_token);
2279
2280         /* And release when done */
2281         ast_mutex_unlock(&pvt->lock);
2282         if (!c) {
2283                 ast_log(LOG_ERROR, "Couldn't create channel. This is bad\n");
2284                 return 0;
2285         }
2286         return 1;
2287 }
2288
2289 /**
2290  * Call-back function to establish an outgoing H.323 call
2291  *
2292  * Returns 1 on success
2293  */
2294 static int setup_outgoing_call(call_details_t *cd)
2295 {
2296         /* Use argument here or free it immediately */
2297         cleanup_call_details(cd);
2298
2299         return 1;
2300 }
2301
2302 /**
2303   *  Call-back function to signal asterisk that the channel is ringing
2304   *  Returns nothing
2305   */
2306 static void chan_ringing(unsigned call_reference, const char *token)
2307 {
2308         struct oh323_pvt *pvt;
2309
2310         if (h323debug)
2311                 ast_log(LOG_DEBUG, "Ringing on %s\n", token);
2312
2313         pvt = find_call_locked(call_reference, token);
2314         if (!pvt) {
2315                 ast_log(LOG_ERROR, "Something is wrong: ringing\n");
2316                 return;
2317         }
2318         if (!pvt->owner) {
2319                 ast_mutex_unlock(&pvt->lock);
2320                 ast_log(LOG_ERROR, "Channel has no owner\n");
2321                 return;
2322         }
2323         update_state(pvt, AST_STATE_RINGING, AST_CONTROL_RINGING);
2324         ast_mutex_unlock(&pvt->lock);
2325         return;
2326 }
2327
2328 /**
2329   * Call-back function to cleanup communication
2330   * Returns nothing,
2331   */
2332 static void cleanup_connection(unsigned call_reference, const char *call_token)
2333 {
2334         struct oh323_pvt *pvt;
2335
2336         if (h323debug)
2337                 ast_log(LOG_DEBUG, "Cleaning connection to %s\n", call_token);
2338
2339         while (1) {
2340                 pvt = find_call_locked(call_reference, call_token);
2341                 if (!pvt) {
2342                         if (h323debug)
2343                                 ast_log(LOG_DEBUG, "No connection for %s\n", call_token);
2344                         return;
2345                 }
2346                 if (!pvt->owner || !ast_channel_trylock(pvt->owner))
2347                         break;
2348 #if 1
2349 #ifdef DEBUG_THREADS
2350                 ast_log(LOG_NOTICE, "Avoiding H.323 destory deadlock on %s, locked at %ld/%d by %s (%s:%d)\n", call_token, pvt->owner->lock.thread[0], pvt->owner->lock.reentrancy, pvt->owner->lock.func[0], pvt->owner->lock.file[0], pvt->owner->lock.lineno[0]);
2351 #else
2352                 ast_log(LOG_NOTICE, "Avoiding H.323 destory deadlock on %s\n", call_token);
2353 #endif
2354 #endif
2355                 ast_mutex_unlock(&pvt->lock);
2356                 usleep(1);
2357         }
2358         if (pvt->rtp) {
2359                 /* Immediately stop RTP */
2360                 ast_rtp_destroy(pvt->rtp);
2361                 pvt->rtp = NULL;
2362         }
2363         /* Free dsp used for in-band DTMF detection */
2364         if (pvt->vad) {
2365                 ast_dsp_free(pvt->vad);
2366                 pvt->vad = NULL;
2367         }
2368         cleanup_call_details(&pvt->cd);
2369         pvt->alreadygone = 1;
2370         /* Send hangup */
2371         if (pvt->owner) {
2372                 pvt->owner->_softhangup |= AST_SOFTHANGUP_DEV;
2373                 ast_queue_hangup(pvt->owner);
2374                 ast_channel_unlock(pvt->owner);
2375         }
2376         ast_mutex_unlock(&pvt->lock);
2377         if (h323debug)
2378                 ast_log(LOG_DEBUG, "Connection to %s cleaned\n", call_token);
2379         return;
2380 }
2381
2382 static void hangup_connection(unsigned int call_reference, const char *token, int cause)
2383 {
2384         struct oh323_pvt *pvt;
2385
2386         if (h323debug) {
2387                 ast_log(LOG_DEBUG, "Hanging up connection to %s with cause %d\n", token, cause);
2388         }
2389
2390         pvt = find_call_locked(call_reference, token);
2391         if (!pvt) {
2392                 if (h323debug) {
2393                         ast_log(LOG_DEBUG, "Connection to %s already cleared\n", token);
2394                 }
2395                 return;
2396         }
2397         if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
2398                 pvt->owner->_softhangup |= AST_SOFTHANGUP_DEV;
2399                 pvt->owner->hangupcause = pvt->hangupcause = cause;
2400                 ast_queue_hangup(pvt->owner);
2401                 ast_channel_unlock(pvt->owner);
2402         }
2403         else {
2404                 pvt->needhangup = 1;
2405                 pvt->hangupcause = cause;
2406                 if (h323debug)
2407                         ast_log(LOG_DEBUG, "Hangup for %s is pending\n", token);
2408         }
2409         ast_mutex_unlock(&pvt->lock);
2410 }
2411
2412 static void set_dtmf_payload(unsigned call_reference, const char *token, int payload, int is_cisco)
2413 {
2414         struct oh323_pvt *pvt;
2415
2416         if (h323debug)
2417                 ast_log(LOG_DEBUG, "Setting %s DTMF payload to %d on %s\n", (is_cisco ? "Cisco" : "RFC2833"), payload, token);
2418
2419         pvt = find_call_locked(call_reference, token);
2420         if (!pvt) {
2421                 return;
2422         }
2423         if (pvt->rtp) {
2424                 ast_rtp_set_rtpmap_type(pvt->rtp, payload, "audio", (is_cisco ? "cisco-telephone-event" : "telephone-event"), 0);
2425         }
2426         pvt->dtmf_pt[is_cisco ? 1 : 0] = payload;
2427         ast_mutex_unlock(&pvt->lock);
2428         if (h323debug)
2429                 ast_log(LOG_DEBUG, "DTMF payload on %s set to %d\n", token, payload);
2430 }
2431
2432 static void set_peer_capabilities(unsigned call_reference, const char *token, int capabilities, struct ast_codec_pref *prefs)
2433 {
2434         struct oh323_pvt *pvt;
2435
2436         if (h323debug)
2437                 ast_log(LOG_DEBUG, "Got remote capabilities from connection %s\n", token);
2438
2439         pvt = find_call_locked(call_reference, token);
2440         if (!pvt)
2441                 return;
2442         pvt->peercapability = capabilities;
2443         pvt->jointcapability = pvt->options.capability & capabilities;
2444         if (prefs) {
2445                 memcpy(&pvt->peer_prefs, prefs, sizeof(pvt->peer_prefs));
2446                 if (h323debug) {
2447                         int i;
2448                         for (i = 0; i < 32; ++i) {
2449                                 ast_log(LOG_DEBUG, "prefs[%d]=%s:%d\n", i, (prefs->order[i] ? ast_getformatname(1 << (prefs->order[i]-1)) : "<none>"), prefs->framing[i]);
2450                         }
2451                 }
2452                 if (pvt->rtp)
2453                         ast_rtp_codec_setpref(pvt->rtp, &pvt->peer_prefs);
2454         }
2455         ast_mutex_unlock(&pvt->lock);
2456 }
2457
2458 static void set_local_capabilities(unsigned call_reference, const char *token)
2459 {
2460         struct oh323_pvt *pvt;
2461         int capability, dtmfmode, pref_codec;
2462         struct ast_codec_pref prefs;
2463
2464         if (h323debug)
2465                 ast_log(LOG_DEBUG, "Setting capabilities for connection %s\n", token);
2466
2467         pvt = find_call_locked(call_reference, token);
2468         if (!pvt)
2469                 return;
2470         capability = (pvt->jointcapability) ? pvt->jointcapability : pvt->options.capability;
2471         dtmfmode = pvt->options.dtmfmode;
2472         prefs = pvt->options.prefs;
2473         pref_codec = pvt->pref_codec;
2474         ast_mutex_unlock(&pvt->lock);
2475         h323_set_capabilities(token, capability, dtmfmode, &prefs, pref_codec);
2476
2477         if (h323debug)
2478                 ast_log(LOG_DEBUG, "Capabilities for connection %s is set\n", token);
2479 }
2480
2481 static void remote_hold(unsigned call_reference, const char *token, int is_hold)
2482 {
2483         struct oh323_pvt *pvt;
2484
2485         if (h323debug)
2486                 ast_log(LOG_DEBUG, "Setting %shold status for connection %s\n", (is_hold ? "" : "un"), token);
2487
2488         pvt = find_call_locked(call_reference, token);
2489         if (!pvt)
2490                 return;
2491         if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
2492                 if (is_hold)
2493                         ast_queue_control(pvt->owner, AST_CONTROL_HOLD);
2494                 else
2495                         ast_queue_control(pvt->owner, AST_CONTROL_UNHOLD);
2496                 ast_channel_unlock(pvt->owner);
2497         }
2498         else {
2499                 if (is_hold)
2500                         pvt->newcontrol = AST_CONTROL_HOLD;
2501                 else
2502                         pvt->newcontrol = AST_CONTROL_UNHOLD;
2503         }
2504         ast_mutex_unlock(&pvt->lock);
2505 }
2506
2507 static void *do_monitor(void *data)
2508 {
2509         int res;
2510         int reloading;
2511         struct oh323_pvt *oh323 = NULL;
2512
2513         for(;;) {
2514                 /* Check for a reload request */
2515                 ast_mutex_lock(&h323_reload_lock);
2516                 reloading = h323_reloading;
2517                 h323_reloading = 0;
2518                 ast_mutex_unlock(&h323_reload_lock);
2519                 if (reloading) {
2520                         if (option_verbose > 0) {
2521                                 ast_verbose(VERBOSE_PREFIX_1 "Reloading H.323\n");
2522                         }
2523                         h323_do_reload();
2524                 }
2525                 /* Check for interfaces needing to be killed */
2526                 if (!ast_mutex_trylock(&iflock)) {
2527 #if 1
2528                         do {
2529                                 for (oh323 = iflist; oh323; oh323 = oh323->next) {
2530                                         if (!ast_mutex_trylock(&oh323->lock)) {
2531                                                 if (oh323->needdestroy) {
2532                                                         __oh323_destroy(oh323);
2533                                                         break;
2534                                                 }
2535                                                 ast_mutex_unlock(&oh323->lock);
2536                                         }
2537                                 }
2538                         } while (/*oh323*/ 0);
2539 #else
2540 restartsearch:
2541                         oh323 = iflist;
2542                         while(oh323) {
2543                                 if (!ast_mutex_trylock(&oh323->lock)) {
2544                                         if (oh323->needdestroy) {
2545                                                 __oh323_destroy(oh323);
2546                                                 goto restartsearch;
2547                                         }
2548                                         ast_mutex_unlock(&oh323->lock);
2549                                         oh323 = oh323->next;
2550                                 }
2551                         }
2552 #endif
2553                         ast_mutex_unlock(&iflock);
2554                 } else
2555                         oh323 = (struct oh323_pvt *)1;  /* Force fast loop */
2556                 pthread_testcancel();
2557                 /* Wait for sched or io */
2558                 res = ast_sched_wait(sched);
2559                 if ((res < 0) || (res > 1000)) {
2560                         res = 1000;
2561                 }
2562                 /* Do not wait if some channel(s) is destroyed, probably, more available too */
2563                 if (oh323)
2564                         res = 1;
2565                 res = ast_io_wait(io, res);
2566                 pthread_testcancel();
2567                 ast_mutex_lock(&monlock);
2568                 if (res >= 0) {
2569                         ast_sched_runq(sched);
2570                 }
2571                 ast_mutex_unlock(&monlock);
2572         }
2573         /* Never reached */
2574         return NULL;
2575 }
2576
2577 static int restart_monitor(void)
2578 {
2579         pthread_attr_t attr;
2580         /* If we're supposed to be stopped -- stay stopped */
2581         if (ast_mutex_lock(&monlock)) {
2582                 ast_log(LOG_WARNING, "Unable to lock monitor\n");
2583                 return -1;
2584         }
2585         if (monitor_thread == AST_PTHREADT_STOP) {
2586                 ast_mutex_unlock(&monlock);
2587                 return 0;
2588         }
2589         if (monitor_thread == pthread_self()) {
2590                 ast_mutex_unlock(&monlock);
2591                 ast_log(LOG_WARNING, "Cannot kill myself\n");
2592                 return -1;
2593         }
2594         if (monitor_thread && (monitor_thread != AST_PTHREADT_NULL)) {
2595                 /* Wake up the thread */
2596                 pthread_kill(monitor_thread, SIGURG);
2597         } else {
2598                 pthread_attr_init(&attr);
2599                 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
2600                 /* Start a new monitor */
2601                 if (ast_pthread_create_background(&monitor_thread, &attr, do_monitor, NULL) < 0) {
2602                         monitor_thread = AST_PTHREADT_NULL;
2603                         ast_mutex_unlock(&monlock);
2604                         ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
2605                         return -1;
2606                 }
2607         }
2608         ast_mutex_unlock(&monlock);
2609         return 0;
2610 }
2611
2612 static int h323_do_trace(int fd, int argc, char *argv[])
2613 {
2614         if (argc != 3) {
2615                 return RESULT_SHOWUSAGE;
2616         }
2617         h323_debug(1, atoi(argv[2]));
2618         ast_cli(fd, "H.323 trace set to level %s\n", argv[2]);
2619         return RESULT_SUCCESS;
2620 }
2621
2622 static int h323_no_trace(int fd, int argc, char *argv[])
2623 {
2624         if (argc != 3) {
2625                 return RESULT_SHOWUSAGE;
2626         }
2627         h323_debug(0,0);
2628         ast_cli(fd, "H.323 trace disabled\n");
2629         return RESULT_SUCCESS;
2630 }
2631
2632 static int h323_do_debug(int fd, int argc, char *argv[])
2633 {
2634         if (argc != 2) {
2635                 return RESULT_SHOWUSAGE;
2636         }
2637         h323debug = 1;
2638         ast_cli(fd, "H.323 debug enabled\n");
2639         return RESULT_SUCCESS;
2640 }
2641
2642 static int h323_no_debug(int fd, int argc, char *argv[])
2643 {
2644         if (argc != 3) {
2645                 return RESULT_SHOWUSAGE;
2646         }
2647         h323debug = 0;
2648         ast_cli(fd, "H.323 debug disabled\n");
2649         return RESULT_SUCCESS;
2650 }
2651
2652 static int h323_gk_cycle(int fd, int argc, char *argv[])
2653 {
2654         if (argc != 3) {
2655                 return RESULT_SHOWUSAGE;
2656         }
2657         h323_gk_urq();
2658
2659         /* Possibly register with a GK */
2660         if (!gatekeeper_disable) {
2661                 if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
2662                         ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
2663                 }
2664         }
2665         return RESULT_SUCCESS;
2666 }
2667
2668 static int h323_ep_hangup(int fd, int argc, char *argv[])
2669 {
2670         if (argc != 3) {
2671                 return RESULT_SHOWUSAGE;
2672         }
2673         if (h323_soft_hangup(argv[2])) {
2674                 ast_verbose(VERBOSE_PREFIX_3 "Hangup succeeded on %s\n", argv[2]);
2675         } else {
2676                 ast_verbose(VERBOSE_PREFIX_3 "Hangup failed for %s\n", argv[2]);
2677         }
2678         return RESULT_SUCCESS;
2679 }
2680
2681 static int h323_tokens_show(int fd, int argc, char *argv[])
2682 {
2683         if (argc != 3) {
2684                 return RESULT_SHOWUSAGE;
2685         }
2686         h323_show_tokens();
2687         return RESULT_SUCCESS;
2688 }
2689
2690 static char trace_usage[] =
2691 "Usage: h323 trace <level num>\n"
2692 "       Enables H.323 stack tracing for debugging purposes\n";
2693
2694 static char no_trace_usage[] =
2695 "Usage: h323 no trace\n"
2696 "       Disables H.323 stack tracing for debugging purposes\n";
2697
2698 static char debug_usage[] =
2699 "Usage: h323 debug\n"
2700 "       Enables H.323 debug output\n";
2701
2702 static char no_debug_usage[] =
2703 "Usage: h323 no debug\n"
2704 "       Disables H.323 debug output\n";
2705
2706 static char show_cycle_usage[] =
2707 "Usage: h323 gk cycle\n"
2708 "       Manually re-register with the Gatekeper (Currently Disabled)\n";
2709
2710 static char show_hangup_usage[] =
2711 "Usage: h323 hangup <token>\n"
2712 "       Manually try to hang up call identified by <token>\n";
2713
2714 static char show_tokens_usage[] =
2715 "Usage: h323 show tokens\n"
2716 "       Print out all active call tokens\n";
2717
2718 static char h323_reload_usage[] =
2719 "Usage: h323 reload\n"
2720 "       Reloads H.323 configuration from h323.conf\n";
2721
2722 static struct ast_cli_entry cli_h323_trace_deprecated =
2723         { { "h.323", "trace", NULL },
2724         h323_do_trace, "Enable H.323 Stack Tracing",
2725         trace_usage };
2726
2727 static struct ast_cli_entry cli_h323_no_trace_deprecated =
2728         { { "h.323", "no", "trace", NULL },
2729           h323_no_trace, "Disable H.323 Stack Tracing",
2730           no_trace_usage };
2731 };
2732
2733 static struct ast_cli_entry cli_h323_debug_deprecated =
2734         { { "h.323", "debug", NULL },
2735         h323_do_debug, "Enable H.323 debug",
2736         debug_usage };
2737
2738 static struct ast_cli_entry cli_h323_no_debug_deprecated =
2739         { { "h.323", "no", "debug", NULL },
2740           h323_no_debug, "Disable H.323 debug",
2741           no_debug_usage };
2742 };
2743
2744 static struct ast_cli_entry cli_h323_gk_cycle_deprecated =
2745         { { "h.323", "gk", "cycle", NULL },
2746         h323_gk_cycle, "Manually re-register with the Gatekeper",
2747         show_cycle_usage };
2748
2749 static struct ast_cli_entry cli_h323_hangup_deprecated =
2750         { { "h.323", "hangup", NULL },
2751         h323_ep_hangup, "Manually try to hang up a call",
2752         show_hangup_usage };
2753
2754 static struct ast_cli_entry cli_h323_show_tokens_deprecated =
2755         { { "h.323", "show", "tokens", NULL },
2756         h323_tokens_show, "Show all active call tokens",
2757         show_tokens_usage };
2758
2759 static struct ast_cli_entry cli_h323[] = {
2760         { { "h323", "trace", NULL },
2761         h323_do_trace, "Enable H.323 Stack Tracing",
2762         trace_usage, NULL, &cli_h323_trace_deprecated },
2763
2764         { { "h323", "trace", "off", NULL },
2765         h323_no_trace, "Disable H.323 Stack Tracing",
2766         no_trace_usage, NULL, &cli_h323_no_trace_deprecated },
2767
2768         { { "h323", "debug", NULL },
2769         h323_do_debug, "Enable H.323 debug",
2770         debug_usage, NULL, &cli_h323_debug_deprecated },
2771
2772         { { "h323", "debug", "off", NULL },
2773         h323_no_debug, "Disable H.323 debug",
2774         no_debug_usage, NULL, &cli_h323_no_debug_deprecated },
2775
2776         { { "h323", "cycle", "gk", NULL },
2777         h323_gk_cycle, "Manually re-register with the Gatekeper",
2778         show_cycle_usage, NULL, &cli_h323_gk_cycle_deprecated },
2779
2780         { { "h323", "hangup", NULL },
2781         h323_ep_hangup, "Manually try to hang up a call",
2782         show_hangup_usage, NULL, &cli_h323_hangup_deprecated },
2783
2784         { { "h323", "show", "tokens", NULL },
2785         h323_tokens_show, "Show all active call tokens",
2786         show_tokens_usage, NULL, &cli_h323_show_tokens_deprecated },
2787 };
2788
2789 static int reload_config(int is_reload)
2790 {
2791         int format;
2792         struct ast_config *cfg, *ucfg;
2793         struct ast_variable *v;
2794         struct oh323_peer *peer = NULL;
2795         struct oh323_user *user = NULL;
2796         struct oh323_alias *alias = NULL;
2797         struct ast_hostent ahp; struct hostent *hp;
2798         char *cat;
2799         const char *utype;
2800         int is_user, is_peer, is_alias;
2801         char _gatekeeper[100];
2802         int gk_discover, gk_disable, gk_changed;
2803
2804         cfg = ast_config_load(config);
2805
2806         /* We *must* have a config file otherwise stop immediately */
2807         if (!cfg) {
2808                 ast_log(LOG_NOTICE, "Unable to load config %s, H.323 disabled\n", config);
2809                 return 1;
2810         }
2811
2812         /* fire up the H.323 Endpoint */
2813         if (!h323_end_point_exist()) {
2814                 h323_end_point_create();
2815         }
2816         ast_copy_string(_gatekeeper, gatekeeper, sizeof(_gatekeeper));
2817         gk_discover = gatekeeper_discover;
2818         gk_disable = gatekeeper_disable;
2819         memset(&bindaddr, 0, sizeof(bindaddr));
2820         memset(&global_options, 0, sizeof(global_options));
2821         global_options.fastStart = 1;
2822         global_options.h245Tunneling = 1;
2823         global_options.dtmfcodec[0] = H323_DTMF_RFC2833_PT;
2824         global_options.dtmfcodec[1] = H323_DTMF_CISCO_PT;
2825         global_options.dtmfmode = 0;
2826         global_options.holdHandling = 0;
2827         global_options.capability = GLOBAL_CAPABILITY;
2828         global_options.bridge = 1;              /* Do native bridging by default */
2829         strcpy(default_context, "default");
2830         h323_signalling_port = 1720;
2831         gatekeeper_disable = 1;
2832         gatekeeper_discover = 0;
2833         gkroute = 0;
2834         userbyalias = 1;
2835         acceptAnonymous = 1;
2836         tos = 0;
2837
2838         /* Copy the default jb config over global_jbconf */
2839         memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
2840
2841         /* Load configuration from users.conf */
2842         ucfg = ast_config_load("users.conf");
2843         if (ucfg) {
2844                 struct ast_variable *gen;
2845                 int genhas_h323;
2846                 const char *has_h323;
2847
2848                 genhas_h323 = ast_true(ast_variable_retrieve(ucfg, "general", "hash323"));
2849                 gen = ast_variable_browse(ucfg, "general");
2850                 for (cat = ast_category_browse(ucfg, NULL); cat; cat = ast_category_browse(ucfg, cat)) {
2851                         if (strcasecmp(cat, "general")) {
2852                                 has_h323 = ast_variable_retrieve(ucfg, cat, "hash323");
2853                                 if (ast_true(has_h323) || (!has_h323 && genhas_h323)) {
2854                                         user = build_user(cat, gen, ast_variable_browse(ucfg, cat), 0);
2855                                         if (user) {
2856                                                 ASTOBJ_CONTAINER_LINK(&userl, user);
2857                                                 ASTOBJ_UNREF(user, oh323_destroy_user);
2858                                         }
2859                                 }
2860                         }
2861                 }
2862                 ast_config_destroy(ucfg);
2863         }
2864
2865         for (v = ast_variable_browse(cfg, "general"); v; v = v->next) {
2866                 /* handle jb conf */
2867                 if (!ast_jb_read_conf(&global_jbconf, v->name, v->value))
2868                         continue;
2869                 /* Create the interface list */
2870                 if (!strcasecmp(v->name, "port")) {
2871                         h323_signalling_port = (int)strtol(v->value, NULL, 10);
2872                 } else if (!strcasecmp(v->name, "bindaddr")) {
2873                         if (!(hp = ast_gethostbyname(v->value, &ahp))) {
2874                                 ast_log(LOG_WARNING, "Invalid address: %s\n", v->value);
2875                         } else {
2876                                 memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
2877                         }
2878                 } else if (!strcasecmp(v->name, "tos")) {
2879                         if (sscanf(v->value, "%d", &format)) {
2880                                 tos = format & 0xff;
2881                         } else if (!strcasecmp(v->value, "lowdelay")) {
2882                                 tos = IPTOS_LOWDELAY;
2883                         } else if (!strcasecmp(v->value, "throughput")) {
2884                                 tos = IPTOS_THROUGHPUT;
2885                         } else if (!strcasecmp(v->value, "reliability")) {
2886                                 tos = IPTOS_RELIABILITY;
2887                         } else if (!strcasecmp(v->value, "mincost")) {
2888                                 tos = IPTOS_MINCOST;
2889                         } else if (!strcasecmp(v->value, "none")) {
2890                                 tos = 0;
2891                         } else {
2892                                 ast_log(LOG_WARNING, "Invalid tos value at line %d, should be 'lowdelay', 'throughput', 'reliability', 'mincost', or 'none'\n", v->lineno);
2893                         }
2894                 } else if (!strcasecmp(v->name, "gatekeeper")) {
2895                         if (!strcasecmp(v->value, "DISABLE")) {
2896                                 gatekeeper_disable = 1;
2897                         } else if (!strcasecmp(v->value, "DISCOVER")) {
2898                                 gatekeeper_disable = 0;
2899                                 gatekeeper_discover = 1;
2900                         } else {
2901                                 gatekeeper_disable = 0;
2902                                 ast_copy_string(gatekeeper, v->value, sizeof(gatekeeper));
2903                         }
2904                 } else if (!strcasecmp(v->name, "secret")) {
2905                         ast_copy_string(secret, v->value, sizeof(secret));
2906                 } else if (!strcasecmp(v->name, "AllowGKRouted")) {
2907                         gkroute = ast_true(v->value);
2908                 } else if (!strcasecmp(v->name, "context")) {
2909                         ast_copy_string(default_context, v->value, sizeof(default_context));
2910                         ast_verbose(VERBOSE_PREFIX_2 "Setting default context to %s\n", default_context);
2911                 } else if (!strcasecmp(v->name, "UserByAlias")) {
2912                         userbyalias = ast_true(v->value);
2913                 } else if (!strcasecmp(v->name, "AcceptAnonymous")) {
2914                         acceptAnonymous = ast_true(v->value);
2915                 } else if (!update_common_options(v, &global_options)) {
2916                         /* dummy */
2917                 }
2918         }
2919         if (!global_options.dtmfmode)
2920                 global_options.dtmfmode = H323_DTMF_RFC2833;
2921         if (global_options.holdHandling == ~0)
2922                 global_options.holdHandling = 0;
2923         else if (!global_options.holdHandling)
2924                 global_options.holdHandling = H323_HOLD_H450;
2925
2926         for (cat = ast_category_browse(cfg, NULL); cat; cat = ast_category_browse(cfg, cat)) {
2927                 if (strcasecmp(cat, "general")) {
2928                         utype = ast_variable_retrieve(cfg, cat, "type");
2929                         if (utype) {
2930                                 is_user = is_peer = is_alias = 0;
2931                                 if (!strcasecmp(utype, "user"))
2932                                         is_user = 1;
2933                                 else if (!strcasecmp(utype, "peer"))
2934                                         is_peer = 1;
2935                                 else if (!strcasecmp(utype, "friend"))
2936                                         is_user = is_peer = 1;
2937                                 else if (!strcasecmp(utype, "h323") || !strcasecmp(utype, "alias"))
2938                                         is_alias = 1;
2939                                 else {
2940                                         ast_log(LOG_WARNING, "Unknown type '%s' for '%s' in %s\n", utype, cat, config);
2941                                         continue;
2942                                 }
2943                                 if (is_user) {
2944                                         user = build_user(cat, ast_variable_browse(cfg, cat), NULL, 0);
2945                                         if (user) {
2946                                                 ASTOBJ_CONTAINER_LINK(&userl, user);
2947                                                 ASTOBJ_UNREF(user, oh323_destroy_user);
2948                                         }
2949                                 }
2950                                 if (is_peer) {
2951                                         peer = build_peer(cat, ast_variable_browse(cfg, cat), NULL, 0);
2952                                         if (peer) {
2953                                                 ASTOBJ_CONTAINER_LINK(&peerl, peer);
2954                                                 ASTOBJ_UNREF(peer, oh323_destroy_peer);
2955                                         }
2956                                 }
2957                                 if (is_alias) {
2958                                         alias = build_alias(cat, ast_variable_browse(cfg, cat), NULL, 0);
2959                                         if (alias) {
2960                                                 ASTOBJ_CONTAINER_LINK(&aliasl, alias);
2961                                                 ASTOBJ_UNREF(alias, oh323_destroy_alias);
2962                                         }
2963                                 }
2964                         } else {
2965                                 ast_log(LOG_WARNING, "Section '%s' lacks type\n", cat);
2966                         }
2967                 }
2968         }
2969         ast_config_destroy(cfg);
2970
2971         /* Register our H.323 aliases if any*/
2972         ASTOBJ_CONTAINER_WRLOCK(&aliasl);
2973         ASTOBJ_CONTAINER_TRAVERSE(&aliasl, 1, do {
2974                 ASTOBJ_RDLOCK(iterator);
2975                 if (h323_set_alias(iterator)) {
2976                         ast_log(LOG_ERROR, "Alias %s rejected by endpoint\n", alias->name);
2977                         ASTOBJ_UNLOCK(iterator);
2978                         continue;
2979                 }
2980                 ASTOBJ_UNLOCK(iterator);
2981         } while (0) );
2982         ASTOBJ_CONTAINER_UNLOCK(&aliasl);
2983
2984         /* Don't touch GK if nothing changed because URQ will drop all existing calls */
2985         gk_changed = 0;
2986         if (gatekeeper_disable != gk_disable)
2987                 gk_changed = is_reload;
2988         else if(!gatekeeper_disable && (gatekeeper_discover != gk_discover))
2989                 gk_changed = is_reload;
2990         else if(!gatekeeper_disable && (strncmp(_gatekeeper, gatekeeper, sizeof(_gatekeeper)) != 0))
2991                 gk_changed = is_reload;
2992         if (gk_changed) {
2993                 if(!gk_disable)
2994                         h323_gk_urq();
2995                 if (!gatekeeper_disable) {
2996                         if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
2997                                 ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
2998                                 gatekeeper_disable = 1;
2999                         }
3000                 }
3001         }
3002         return 0;
3003 }
3004
3005 static void delete_users(void)
3006 {
3007         int pruned = 0;
3008
3009         /* Delete all users */
3010         ASTOBJ_CONTAINER_WRLOCK(&userl);
3011         ASTOBJ_CONTAINER_TRAVERSE(&userl, 1, do {
3012                 ASTOBJ_RDLOCK(iterator);
3013                 ASTOBJ_MARK(iterator);
3014                 ++pruned;
3015                 ASTOBJ_UNLOCK(iterator);
3016         } while (0) );
3017         if (pruned) {
3018                 ASTOBJ_CONTAINER_PRUNE_MARKED(&userl, oh323_destroy_user);
3019         }
3020         ASTOBJ_CONTAINER_UNLOCK(&userl);
3021
3022         ASTOBJ_CONTAINER_WRLOCK(&peerl);
3023         ASTOBJ_CONTAINER_TRAVERSE(&peerl, 1, do {
3024                 ASTOBJ_RDLOCK(iterator);
3025                 ASTOBJ_MARK(iterator);
3026                 ASTOBJ_UNLOCK(iterator);
3027         } while (0) );
3028         ASTOBJ_CONTAINER_UNLOCK(&peerl);
3029 }
3030
3031 static void delete_aliases(void)
3032 {
3033         int pruned = 0;
3034
3035         /* Delete all aliases */
3036         ASTOBJ_CONTAINER_WRLOCK(&aliasl);
3037         ASTOBJ_CONTAINER_TRAVERSE(&aliasl, 1, do {
3038                 ASTOBJ_RDLOCK(iterator);
3039                 ASTOBJ_MARK(iterator);
3040                 ++pruned;
3041                 ASTOBJ_UNLOCK(iterator);
3042         } while (0) );
3043         if (pruned) {
3044                 ASTOBJ_CONTAINER_PRUNE_MARKED(&aliasl, oh323_destroy_alias);
3045         }
3046         ASTOBJ_CONTAINER_UNLOCK(&aliasl);
3047 }
3048
3049 static void prune_peers(void)
3050 {
3051         /* Prune peers who still are supposed to be deleted */
3052         ASTOBJ_CONTAINER_PRUNE_MARKED(&peerl, oh323_destroy_peer);
3053 }
3054
3055 static int h323_reload(int fd, int argc, char *argv[])
3056 {
3057         ast_mutex_lock(&h323_reload_lock);
3058         if (h323_reloading) {
3059                 ast_verbose("Previous H.323 reload not yet done\n");
3060         } else {
3061                 h323_reloading = 1;
3062         }
3063         ast_mutex_unlock(&h323_reload_lock);
3064         restart_monitor();
3065         return 0;
3066 }
3067
3068 static int h323_do_reload(void)
3069 {
3070         delete_users();
3071         delete_aliases();
3072         prune_peers();
3073         reload_config(1);
3074         return 0;
3075 }
3076
3077 static int reload(void)
3078 {
3079         return h323_reload(0, 0, NULL);
3080 }
3081
3082 static struct ast_cli_entry cli_h323_reload_deprecated =
3083         { { "h.323", "reload", NULL },
3084         h323_reload, "Reload H.323 configuration",
3085         h323_reload_usage
3086 };
3087
3088 static struct ast_cli_entry cli_h323_reload =
3089         { { "h323", "reload", NULL },
3090         h323_reload, "Reload H.323 configuration",
3091         h323_reload_usage, NULL, &cli_h323_reload_deprecated
3092 };
3093
3094 static enum ast_rtp_get_result oh323_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp)
3095 {
3096         struct oh323_pvt *pvt;
3097         enum ast_rtp_get_result res = AST_RTP_GET_FAILED;
3098
3099         if (!(pvt = (struct oh323_pvt *)chan->tech_pvt))
3100                 return res;
3101
3102         ast_mutex_lock(&pvt->lock);
3103         if (pvt->rtp && pvt->options.bridge) {
3104                 *rtp = pvt->rtp;
3105                 res = AST_RTP_TRY_NATIVE;
3106         }
3107         ast_mutex_unlock(&pvt->lock);
3108
3109         return res;
3110 }
3111
3112 static enum ast_rtp_get_result oh323_get_vrtp_peer(struct ast_channel *chan, struct ast_rtp **rtp)
3113 {
3114         return AST_RTP_GET_FAILED;
3115 }
3116
3117 static char *convertcap(int cap)
3118 {
3119         switch (cap) {
3120         case AST_FORMAT_G723_1:
3121                 return "G.723";
3122         case AST_FORMAT_GSM:
3123                 return "GSM";
3124         case AST_FORMAT_ULAW:
3125                 return "ULAW";
3126         case AST_FORMAT_ALAW:
3127                 return "ALAW";
3128         case AST_FORMAT_G722:
3129                 return "G.722";
3130         case AST_FORMAT_ADPCM:
3131                 return "G.728";
3132         case AST_FORMAT_G729A:
3133                 return "G.729";
3134         case AST_FORMAT_SPEEX:
3135                 return "SPEEX";
3136         case AST_FORMAT_ILBC:
3137                 return "ILBC";
3138         default:
3139                 ast_log(LOG_NOTICE, "Don't know how to deal with mode %d\n", cap);
3140                 return NULL;
3141         }
3142 }
3143
3144 static int oh323_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp, int codecs, int nat_active)
3145 {
3146         /* XXX Deal with Video */
3147         struct oh323_pvt *pvt;
3148         struct sockaddr_in them;
3149         struct sockaddr_in us;
3150         char *mode;
3151
3152         if (!rtp) {
3153                 return 0;
3154         }
3155
3156         mode = convertcap(chan->writeformat);
3157         pvt = (struct oh323_pvt *) chan->tech_pvt;
3158         if (!pvt) {
3159                 ast_log(LOG_ERROR, "No Private Structure, this is bad\n");
3160                 return -1;
3161         }
3162         ast_rtp_get_peer(rtp, &them);
3163         ast_rtp_get_us(rtp, &us);
3164 #if 0   /* Native bridge still isn't ready */
3165         h323_native_bridge(pvt->cd.call_token, ast_inet_ntoa(them.sin_addr), mode);
3166 #endif
3167         return 0;
3168 }
3169
3170 static struct ast_rtp_protocol oh323_rtp = {
3171         .type = "H323",
3172         .get_rtp_info = oh323_get_rtp_peer,
3173         .get_vrtp_info = oh323_get_vrtp_peer,
3174         .set_rtp_peer = oh323_set_rtp_peer,
3175 };
3176
3177 static enum ast_module_load_result load_module(void)
3178 {
3179         int res;
3180
3181         h323debug = 0;
3182         sched = sched_context_create();
3183         if (!sched) {
3184                 ast_log(LOG_WARNING, "Unable to create schedule context\n");
3185                 return AST_MODULE_LOAD_FAILURE;
3186         }
3187         io = io_context_create();
3188         if (!io) {
3189                 ast_log(LOG_WARNING, "Unable to create I/O context\n");
3190                 return AST_MODULE_LOAD_FAILURE;
3191         }
3192         ast_cli_register(&cli_h323_reload);
3193         ASTOBJ_CONTAINER_INIT(&userl);
3194         ASTOBJ_CONTAINER_INIT(&peerl);
3195         ASTOBJ_CONTAINER_INIT(&aliasl);
3196         res = reload_config(0);
3197         if (res) {
3198                 ast_cli_unregister(&cli_h323_reload);
3199                 io_context_destroy(io);
3200                 sched_context_destroy(sched);
3201                 ASTOBJ_CONTAINER_DESTROY(&userl);
3202                 ASTOBJ_CONTAINER_DESTROY(&peerl);
3203                 ASTOBJ_CONTAINER_DESTROY(&aliasl);
3204                 return /*AST_MODULE_LOAD_DECLINE*/AST_MODULE_LOAD_FAILURE;
3205         } else {
3206                 /* Make sure we can register our channel type */
3207                 if (ast_channel_register(&oh323_tech)) {
3208                         ast_log(LOG_ERROR, "Unable to register channel class 'H323'\n");
3209                         ast_cli_unregister(&cli_h323_reload);
3210                         h323_end_process();
3211                         io_context_destroy(io);
3212                         sched_context_destroy(sched);
3213
3214                         ASTOBJ_CONTAINER_DESTROYALL(&userl, oh323_destroy_user);
3215                         ASTOBJ_CONTAINER_DESTROY(&userl);
3216                         ASTOBJ_CONTAINER_DESTROYALL(&peerl, oh323_destroy_peer);
3217                         ASTOBJ_CONTAINER_DESTROY(&peerl);
3218                         ASTOBJ_CONTAINER_DESTROYALL(&aliasl, oh323_destroy_alias);
3219                         ASTOBJ_CONTAINER_DESTROY(&aliasl);
3220
3221                         return AST_MODULE_LOAD_FAILURE;
3222                 }
3223                 ast_cli_register_multiple(cli_h323, sizeof(cli_h323) / sizeof(struct ast_cli_entry));
3224
3225                 ast_rtp_proto_register(&oh323_rtp);
3226
3227                 /* Register our callback functions */
3228                 h323_callback_register(setup_incoming_call,
3229                                                 setup_outgoing_call,
3230                                                 external_rtp_create,
3231                                                 setup_rtp_connection,
3232                                                 cleanup_connection,
3233                                                 chan_ringing,
3234                                                 connection_made,
3235                                                 receive_digit,
3236                                                 answer_call,
3237                                                 progress,
3238                                                 set_dtmf_payload,
3239                                                 hangup_connection,
3240                                                 set_local_capabilities,
3241                                                 set_peer_capabilities,
3242                                                 remote_hold);
3243                 /* start the h.323 listener */
3244                 if (h323_start_listener(h323_signalling_port, bindaddr)) {
3245                         ast_log(LOG_ERROR, "Unable to create H323 listener.\n");
3246                         ast_rtp_proto_unregister(&oh323_rtp);
3247                         ast_cli_unregister_multiple(cli_h323, sizeof(cli_h323) / sizeof(struct ast_cli_entry));
3248                         ast_cli_unregister(&cli_h323_reload);
3249                         h323_end_process();
3250                         io_context_destroy(io);
3251                         sched_context_destroy(sched);
3252
3253                         ASTOBJ_CONTAINER_DESTROYALL(&userl, oh323_destroy_user);
3254                         ASTOBJ_CONTAINER_DESTROY(&userl);
3255                         ASTOBJ_CONTAINER_DESTROYALL(&peerl, oh323_destroy_peer);
3256                         ASTOBJ_CONTAINER_DESTROY(&peerl);
3257                         ASTOBJ_CONTAINER_DESTROYALL(&aliasl, oh323_destroy_alias);
3258                         ASTOBJ_CONTAINER_DESTROY(&aliasl);
3259
3260                         return AST_MODULE_LOAD_FAILURE;
3261                 }
3262                 /* Possibly register with a GK */
3263                 if (!gatekeeper_disable) {
3264                         if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
3265                                 ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
3266                                 gatekeeper_disable = 1;
3267                                 res = AST_MODULE_LOAD_SUCCESS;
3268                         }
3269                 }
3270                 /* And start the monitor for the first time */
3271                 restart_monitor();
3272         }
3273         return res;
3274 }
3275
3276 static int unload_module(void)
3277 {
3278         struct oh323_pvt *p, *pl;
3279
3280         /* unregister commands */
3281         ast_cli_unregister_multiple(cli_h323, sizeof(cli_h323) / sizeof(struct ast_cli_entry));
3282         ast_cli_unregister(&cli_h323_reload);
3283
3284         ast_channel_unregister(&oh323_tech);
3285         ast_rtp_proto_unregister(&oh323_rtp);
3286
3287         if (!ast_mutex_lock(&iflock)) {
3288                 /* hangup all interfaces if they have an owner */
3289                 p = iflist;
3290                 while(p) {
3291                         if (p->owner) {
3292                                 ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
3293                         }
3294                         p = p->next;
3295                 }
3296                 iflist = NULL;
3297                 ast_mutex_unlock(&iflock);
3298         } else {
3299                 ast_log(LOG_WARNING, "Unable to lock the interface list\n");
3300                 return -1;
3301         }
3302         if (!ast_mutex_lock(&monlock)) {
3303                 if ((monitor_thread != AST_PTHREADT_STOP) && (monitor_thread != AST_PTHREADT_NULL)) {
3304                         /* this causes a seg, anyone know why? */
3305                         if (monitor_thread != pthread_self())
3306                                 pthread_cancel(monitor_thread);
3307                         pthread_kill(monitor_thread, SIGURG);
3308                         pthread_join(monitor_thread, NULL);
3309                 }
3310                 monitor_thread = AST_PTHREADT_STOP;
3311                 ast_mutex_unlock(&monlock);
3312         } else {
3313                 ast_log(LOG_WARNING, "Unable to lock the monitor\n");
3314                 return -1;
3315         }
3316         if (!ast_mutex_lock(&iflock)) {
3317                 /* destroy all the interfaces and free their memory */
3318                 p = iflist;
3319                 while(p) {
3320                         pl = p;
3321                         p = p->next;
3322                         /* free associated memory */
3323                         ast_mutex_destroy(&pl->lock);
3324                         free(pl);
3325                 }
3326                 iflist = NULL;
3327                 ast_mutex_unlock(&iflock);
3328         } else {
3329                 ast_log(LOG_WARNING, "Unable to lock the interface list\n");
3330                 return -1;
3331         }
3332         if (!gatekeeper_disable)
3333                 h323_gk_urq();
3334         h323_end_process();
3335         io_context_destroy(io);
3336         sched_context_destroy(sched);
3337
3338         ASTOBJ_CONTAINER_DESTROYALL(&userl, oh323_destroy_user);
3339         ASTOBJ_CONTAINER_DESTROY(&userl);
3340         ASTOBJ_CONTAINER_DESTROYALL(&peerl, oh323_destroy_peer);
3341         ASTOBJ_CONTAINER_DESTROY(&peerl);
3342         ASTOBJ_CONTAINER_DESTROYALL(&aliasl, oh323_destroy_alias);
3343         ASTOBJ_CONTAINER_DESTROY(&aliasl);
3344
3345         return 0;
3346 }
3347
3348 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "The NuFone Network's OpenH323 Channel Driver",
3349                 .load = load_module,
3350                 .unload = unload_module,
3351                 .reload = reload,
3352 );