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  * \extref OpenH323 http://www.voxgratia.org/
  33  *
  34  * \ingroup channel_drivers
  35  */
  36
  37 /*** MODULEINFO
  38         <depend>openh323</depend>
  39         <defaultenabled>yes</defaultenabled>
  40  ***/
  41
  42 #ifdef __cplusplus
  43 extern "C" {
  44 #endif
  45
  46 #include "asterisk.h"
  47
  48 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  49
  50 #ifdef __cplusplus
  51 }
  52 #endif
  53
  54 #include <sys/types.h>
  55 #include <sys/socket.h>
  56 #include <sys/signal.h>
  57 #include <sys/param.h>
  58 #include <arpa/inet.h>
  59 #include <net/if.h>
  60 #include <netinet/in.h>
  61 #include <netinet/in_systm.h>
  62 #include <netinet/ip.h>
  63 #include <netdb.h>
  64 #include <fcntl.h>
  65
  66 #ifdef __cplusplus
  67 extern "C" {
  68 #endif
  69
  70 #include "asterisk/lock.h"
  71 #include "asterisk/channel.h"
  72 #include "asterisk/config.h"
  73 #include "asterisk/module.h"
  74 #include "asterisk/musiconhold.h"
  75 #include "asterisk/pbx.h"
  76 #include "asterisk/utils.h"
  77 #include "asterisk/sched.h"
  78 #include "asterisk/io.h"
  79 #include "asterisk/rtp.h"
  80 #include "asterisk/acl.h"
  81 #include "asterisk/callerid.h"
  82 #include "asterisk/cli.h"
  83 #include "asterisk/dsp.h"
  84 #include "asterisk/causes.h"
  85 #include "asterisk/stringfields.h"
  86 #include "asterisk/abstract_jb.h"
  87 #include "asterisk/astobj.h"
  88
  89 #ifdef __cplusplus
  90 }
  91 #endif
  92
  93 #include "h323/chan_h323.h"
  94
  95 receive_digit_cb on_receive_digit;
  96 on_rtp_cb on_external_rtp_create;
  97 start_rtp_cb on_start_rtp_channel;
  98 setup_incoming_cb on_incoming_call;
  99 setup_outbound_cb on_outgoing_call;
 100 chan_ringing_cb on_chan_ringing;
 101 con_established_cb on_connection_established;
 102 clear_con_cb on_connection_cleared;
 103 answer_call_cb on_answer_call;
 104 progress_cb on_progress;
 105 rfc2833_cb on_set_rfc2833_payload;
 106 hangup_cb on_hangup;
 107 setcapabilities_cb on_setcapabilities;
 108 setpeercapabilities_cb on_setpeercapabilities;
 109 onhold_cb on_hold;
 110
 111 int h323debug; /*!< global debug flag */
 112
 113 /*! \brief Global jitterbuffer configuration - by default, jb is disabled */
 114 static struct ast_jb_conf default_jbconf =
 115 {
 116         .flags = 0,
 117         .max_size = -1,
 118         .resync_threshold = -1,
 119         .impl = ""
 120 };
 121 static struct ast_jb_conf global_jbconf;
 122
 123 /** Variables required by Asterisk */
 124 static const char tdesc[] = "The NuFone Network's Open H.323 Channel Driver";
 125 static const char config[] = "h323.conf";
 126 static char default_context[AST_MAX_CONTEXT] = "default";
 127 static struct sockaddr_in bindaddr;
 128
 129 #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)
 130
 131 /** H.323 configuration values */
 132 static int h323_signalling_port = 1720;
 133 static char gatekeeper[100];
 134 static int gatekeeper_disable = 1;
 135 static int gatekeeper_discover = 0;
 136 static int gkroute = 0;
 137 /* Find user by alias (h.323 id) is default, alternative is the incomming call's source IP address*/
 138 static int userbyalias = 1;
 139 static int acceptAnonymous = 1;
 140 static unsigned int tos = 0;
 141 static unsigned int cos = 0;
 142 static char secret[50];
 143 static unsigned int unique = 0;
 144
 145 static call_options_t global_options;
 146
 147 /*! \brief Private structure of a OpenH323 channel */
 148 struct oh323_pvt {
 149         ast_mutex_t lock;                       /*!< Channel private lock */
 150         call_options_t options;                 /*!<!< Options to be used during call setup */
 151         int alreadygone;                        /*!< Whether or not we've already been destroyed by our peer */
 152         int needdestroy;                        /*!< if we need to be destroyed */
 153         call_details_t cd;                      /*!< Call details */
 154         struct ast_channel *owner;              /*!< Who owns us */
 155         struct sockaddr_in sa;                  /*!< Our peer */
 156         struct sockaddr_in redirip;             /*!< Where our RTP should be going if not to us */
 157         int nonCodecCapability;                 /*!< non-audio capability */
 158         int outgoing;                           /*!< Outgoing or incoming call? */
 159         char exten[AST_MAX_EXTENSION];          /*!< Requested extension */
 160         char context[AST_MAX_CONTEXT];          /*!< Context where to start */
 161         char accountcode[256];                  /*!< Account code */
 162         char rdnis[80];                         /*!< Referring DNIS, if available */
 163         int amaflags;                           /*!< AMA Flags */
 164         struct ast_rtp *rtp;                    /*!< RTP Session */
 165         struct ast_dsp *vad;                    /*!< Used for in-band DTMF detection */
 166         int nativeformats;                      /*!< Codec formats supported by a channel */
 167         int needhangup;                         /*!< Send hangup when Asterisk is ready */
 168         int hangupcause;                        /*!< Hangup cause from OpenH323 layer */
 169         int newstate;                           /*!< Pending state change */
 170         int newcontrol;                         /*!< Pending control to send */
 171         int newdigit;                           /*!< Pending DTMF digit to send */
 172         int newduration;                        /*!< Pending DTMF digit duration to send */
 173         int pref_codec;                         /*!< Preferred codec */
 174         int peercapability;                     /*!< Capabilities learned from peer */
 175         int jointcapability;                    /*!< Common capabilities for local and remote side */
 176         struct ast_codec_pref peer_prefs;       /*!< Preferenced list of codecs which remote side supports */
 177         int dtmf_pt[2];                         /*!< Payload code used for RFC2833/CISCO messages */
 178         int curDTMF;                            /*!< DTMF tone being generated to Asterisk side */
 179         int DTMFsched;                          /*!< Scheduler descriptor for DTMF */
 180         int update_rtp_info;                    /*!< Configuration of fd's array is pending */
 181         int recvonly;                           /*!< Peer isn't wish to receive our voice stream */
 182         int txDtmfDigit;                        /*!< DTMF digit being to send to H.323 side */
 183         int noInbandDtmf;                       /*!< Inband DTMF processing by DSP isn't available */
 184         int connection_established;             /*!< Call got CONNECT message */
 185         int got_progress;                       /*!< Call got PROGRESS message, pass inband audio */
 186         struct oh323_pvt *next;                 /*!< Next channel in list */
 187 } *iflist = NULL;
 188
 189 /*! \brief H323 User list */
 190 static struct h323_user_list {
 191         ASTOBJ_CONTAINER_COMPONENTS(struct oh323_user);
 192 } userl;
 193
 194 /*! \brief H323 peer list */
 195 static struct h323_peer_list {
 196         ASTOBJ_CONTAINER_COMPONENTS(struct oh323_peer);
 197 } peerl;
 198
 199 /*! \brief H323 alias list */
 200 static struct h323_alias_list {
 201         ASTOBJ_CONTAINER_COMPONENTS(struct oh323_alias);
 202 } aliasl;
 203
 204 /* Asterisk RTP stuff */
 205 static struct sched_context *sched;
 206 static struct io_context *io;
 207
 208 AST_MUTEX_DEFINE_STATIC(iflock);        /*!< Protect the interface list (oh323_pvt) */
 209
 210 /*! \brief  Protect the H.323 monitoring thread, so only one process can kill or start it, and not
 211    when it's doing something critical. */
 212 AST_MUTEX_DEFINE_STATIC(monlock);
 213
 214 /*! \brief Protect the H.323 capabilities list, to avoid more than one channel to set the capabilities simultaneaously in the h323 stack. */
 215 AST_MUTEX_DEFINE_STATIC(caplock);
 216
 217 /*! \brief Protect the reload process */
 218 AST_MUTEX_DEFINE_STATIC(h323_reload_lock);
 219 static int h323_reloading = 0;
 220
 221 /*! \brief This is the thread for the monitor which checks for input on the channels
 222    which are not currently in use. */
 223 static pthread_t monitor_thread = AST_PTHREADT_NULL;
 224 static int restart_monitor(void);
 225 static int h323_do_reload(void);
 226
 227 static void delete_users(void);
 228 static void delete_aliases(void);
 229 static void prune_peers(void);
 230
 231 static struct ast_channel *oh323_request(const char *type, int format, void *data, int *cause);
 232 static int oh323_digit_begin(struct ast_channel *c, char digit);
 233 static int oh323_digit_end(struct ast_channel *c, char digit, unsigned int duration);
 234 static int oh323_call(struct ast_channel *c, char *dest, int timeout);
 235 static int oh323_hangup(struct ast_channel *c);
 236 static int oh323_answer(struct ast_channel *c);
 237 static struct ast_frame *oh323_read(struct ast_channel *c);
 238 static int oh323_write(struct ast_channel *c, struct ast_frame *frame);
 239 static int oh323_indicate(struct ast_channel *c, int condition, const void *data, size_t datalen);
 240 static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
 241
 242 static const struct ast_channel_tech oh323_tech = {
 243         .type = "H323",
 244         .description = tdesc,
 245         .capabilities = AST_FORMAT_AUDIO_MASK,
 246         .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER,
 247         .requester = oh323_request,
 248         .send_digit_begin = oh323_digit_begin,
 249         .send_digit_end = oh323_digit_end,
 250         .call = oh323_call,
 251         .hangup = oh323_hangup,
 252         .answer = oh323_answer,
 253         .read = oh323_read,
 254         .write = oh323_write,
 255         .indicate = oh323_indicate,
 256         .fixup = oh323_fixup,
 257         .bridge = ast_rtp_bridge,
 258 };
 259
 260 static const char* redirectingreason2str(int redirectingreason)
 261 {
 262         switch (redirectingreason) {
 263         case 0:
 264                 return "UNKNOWN";
 265         case 1:
 266                 return "BUSY";
 267         case 2:
 268                 return "NO_REPLY";
 269         case 0xF:
 270                 return "UNCONDITIONAL";
 271         default:
 272                 return "NOREDIRECT";
 273         }
 274 }
 275
 276 static void oh323_destroy_alias(struct oh323_alias *alias)
 277 {
 278         if (h323debug)
 279                 ast_debug(1, "Destroying alias '%s'\n", alias->name);
 280         ast_free(alias);
 281 }
 282
 283 static void oh323_destroy_user(struct oh323_user *user)
 284 {
 285         if (h323debug)
 286                 ast_debug(1, "Destroying user '%s'\n", user->name);
 287         ast_free_ha(user->ha);
 288         ast_free(user);
 289 }
 290
 291 static void oh323_destroy_peer(struct oh323_peer *peer)
 292 {
 293         if (h323debug)
 294                 ast_debug(1, "Destroying peer '%s'\n", peer->name);
 295         ast_free_ha(peer->ha);
 296         ast_free(peer);
 297 }
 298
 299 static int oh323_simulate_dtmf_end(const void *data)
 300 {
 301         struct oh323_pvt *pvt = (struct oh323_pvt *)data;
 302
 303         if (pvt) {
 304                 ast_mutex_lock(&pvt->lock);
 305                 /* Don't hold pvt lock while trying to lock the channel */
 306                 while(pvt->owner && ast_channel_trylock(pvt->owner)) {
 307                         ast_mutex_unlock(&pvt->lock);
 308                         usleep(1);
 309                         ast_mutex_lock(&pvt->lock);
 310                 }
 311
 312                 if (pvt->owner) {
 313                         struct ast_frame f = {
 314                                 .frametype = AST_FRAME_DTMF_END,
 315                                 .subclass = pvt->curDTMF,
 316                                 .samples = 0,
 317                                 .src = "SIMULATE_DTMF_END",
 318                         };
 319                         ast_queue_frame(pvt->owner, &f);
 320                         ast_channel_unlock(pvt->owner);
 321                 }
 322
 323                 pvt->DTMFsched = -1;
 324                 ast_mutex_unlock(&pvt->lock);
 325         }
 326
 327         return 0;
 328 }
 329
 330 /*! \brief Channel and private structures should be already locked */
 331 static void __oh323_update_info(struct ast_channel *c, struct oh323_pvt *pvt)
 332 {
 333         if (c->nativeformats != pvt->nativeformats) {
 334                 if (h323debug)
 335                         ast_debug(1, "Preparing %s for new native format\n", c->name);
 336                 c->nativeformats = pvt->nativeformats;
 337                 ast_set_read_format(c, c->readformat);
 338                 ast_set_write_format(c, c->writeformat);
 339         }
 340         if (pvt->needhangup) {
 341                 if (h323debug)
 342                         ast_debug(1, "Process pending hangup for %s\n", c->name);
 343                 c->_softhangup |= AST_SOFTHANGUP_DEV;
 344                 c->hangupcause = pvt->hangupcause;
 345                 ast_queue_hangup(c);
 346                 pvt->needhangup = 0;
 347                 pvt->newstate = pvt->newcontrol = pvt->newdigit = pvt->DTMFsched = -1;
 348         }
 349         if (pvt->newstate >= 0) {
 350                 ast_setstate(c, pvt->newstate);
 351                 pvt->newstate = -1;
 352         }
 353         if (pvt->newcontrol >= 0) {
 354                 ast_queue_control(c, pvt->newcontrol);
 355                 pvt->newcontrol = -1;
 356         }
 357         if (pvt->newdigit >= 0) {
 358                 struct ast_frame f = {
 359                         .frametype = AST_FRAME_DTMF_END,
 360                         .subclass = pvt->newdigit,
 361                         .samples = pvt->newduration * 8,
 362                         .len = pvt->newduration,
 363                         .src = "UPDATE_INFO",
 364                 };
 365                 if (pvt->newdigit == ' ') {             /* signalUpdate message */
 366                         f.subclass = pvt->curDTMF;
 367                         if (pvt->DTMFsched >= 0) {
 368                                 AST_SCHED_DEL(sched, pvt->DTMFsched);
 369                         }
 370                 } else {                                                /* Regular input or signal message */
 371                         if (pvt->newduration) {         /* This is a signal, signalUpdate follows */
 372                                 f.frametype = AST_FRAME_DTMF_BEGIN;
 373                                 AST_SCHED_DEL(sched, pvt->DTMFsched);
 374                                 pvt->DTMFsched = ast_sched_add(sched, pvt->newduration, oh323_simulate_dtmf_end, pvt);
 375                                 if (h323debug)
 376                                         ast_log(LOG_DTMF, "Scheduled DTMF END simulation for %d ms, id=%d\n", pvt->newduration, pvt->DTMFsched);
 377                         }
 378                         pvt->curDTMF = pvt->newdigit;
 379                 }
 380                 ast_queue_frame(c, &f);
 381                 pvt->newdigit = -1;
 382         }
 383         if (pvt->update_rtp_info > 0) {
 384                 if (pvt->rtp) {
 385                         ast_jb_configure(c, &global_jbconf);
 386                         ast_channel_set_fd(c, 0, ast_rtp_fd(pvt->rtp));
 387                         ast_channel_set_fd(c, 1, ast_rtcp_fd(pvt->rtp));
 388                         ast_queue_frame(pvt->owner, &ast_null_frame);   /* Tell Asterisk to apply changes */
 389                 }
 390                 pvt->update_rtp_info = -1;
 391         }
 392 }
 393
 394 /*! \brief Only channel structure should be locked */
 395 static void oh323_update_info(struct ast_channel *c)
 396 {
 397         struct oh323_pvt *pvt = c->tech_pvt;
 398
 399         if (pvt) {
 400                 ast_mutex_lock(&pvt->lock);
 401                 __oh323_update_info(c, pvt);
 402                 ast_mutex_unlock(&pvt->lock);
 403         }
 404 }
 405
 406 static void cleanup_call_details(call_details_t *cd)
 407 {
 408         if (cd->call_token) {
 409                 ast_free(cd->call_token);
 410                 cd->call_token = NULL;
 411         }
 412         if (cd->call_source_aliases) {
 413                 ast_free(cd->call_source_aliases);
 414                 cd->call_source_aliases = NULL;
 415         }
 416         if (cd->call_dest_alias) {
 417                 ast_free(cd->call_dest_alias);
 418                 cd->call_dest_alias = NULL;
 419         }
 420         if (cd->call_source_name) {
 421                 ast_free(cd->call_source_name);
 422                 cd->call_source_name = NULL;
 423         }
 424         if (cd->call_source_e164) {
 425                 ast_free(cd->call_source_e164);
 426                 cd->call_source_e164 = NULL;
 427         }
 428         if (cd->call_dest_e164) {
 429                 ast_free(cd->call_dest_e164);
 430                 cd->call_dest_e164 = NULL;
 431         }
 432         if (cd->sourceIp) {
 433                 ast_free(cd->sourceIp);
 434                 cd->sourceIp = NULL;
 435         }
 436         if (cd->redirect_number) {
 437                 ast_free(cd->redirect_number);
 438                 cd->redirect_number = NULL;
 439         }
 440 }
 441
 442 static void __oh323_destroy(struct oh323_pvt *pvt)
 443 {
 444         struct oh323_pvt *cur, *prev = NULL;
 445
 446         AST_SCHED_DEL(sched, pvt->DTMFsched);
 447
 448         if (pvt->rtp) {
 449                 ast_rtp_destroy(pvt->rtp);
 450         }
 451
 452         /* Free dsp used for in-band DTMF detection */
 453         if (pvt->vad) {
 454                 ast_dsp_free(pvt->vad);
 455         }
 456         cleanup_call_details(&pvt->cd);
 457
 458         /* Unlink us from the owner if we have one */
 459         if (pvt->owner) {
 460                 ast_channel_lock(pvt->owner);
 461                 if (h323debug)
 462                         ast_debug(1, "Detaching from %s\n", pvt->owner->name);
 463                 pvt->owner->tech_pvt = NULL;
 464                 ast_channel_unlock(pvt->owner);
 465         }
 466         cur = iflist;
 467         while(cur) {
 468                 if (cur == pvt) {
 469                         if (prev)
 470                                 prev->next = cur->next;
 471                         else
 472                                 iflist = cur->next;
 473                         break;
 474                 }
 475                 prev = cur;
 476                 cur = cur->next;
 477         }
 478         if (!cur) {
 479                 ast_log(LOG_WARNING, "%p is not in list?!?! \n", cur);
 480         } else {
 481                 ast_mutex_unlock(&pvt->lock);
 482                 ast_mutex_destroy(&pvt->lock);
 483                 ast_free(pvt);
 484         }
 485 }
 486
 487 static void oh323_destroy(struct oh323_pvt *pvt)
 488 {
 489         if (h323debug) {
 490                 ast_debug(1, "Destroying channel %s\n", (pvt->owner ? pvt->owner->name : "<unknown>"));
 491         }
 492         ast_mutex_lock(&iflock);
 493         ast_mutex_lock(&pvt->lock);
 494         __oh323_destroy(pvt);
 495         ast_mutex_unlock(&iflock);
 496 }
 497
 498 static int oh323_digit_begin(struct ast_channel *c, char digit)
 499 {
 500         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
 501         char *token;
 502
 503         if (!pvt) {
 504                 ast_log(LOG_ERROR, "No private structure?! This is bad\n");
 505                 return -1;
 506         }
 507         ast_mutex_lock(&pvt->lock);
 508         if (pvt->rtp &&
 509                 (((pvt->options.dtmfmode & H323_DTMF_RFC2833) && pvt->dtmf_pt[0])
 510                  /*|| ((pvt->options.dtmfmode & H323_DTMF_CISCO) && pvt->dtmf_pt[1]))*/)) {
 511                 /* out-of-band DTMF */
 512                 if (h323debug) {
 513                         ast_log(LOG_DTMF, "Begin sending out-of-band digit %c on %s\n", digit, c->name);
 514                 }
 515                 ast_rtp_senddigit_begin(pvt->rtp, digit);
 516                 ast_mutex_unlock(&pvt->lock);
 517         } else if (pvt->txDtmfDigit != digit) {
 518                 /* in-band DTMF */
 519                 if (h323debug) {
 520                         ast_log(LOG_DTMF, "Begin sending inband digit %c on %s\n", digit, c->name);
 521                 }
 522                 pvt->txDtmfDigit = digit;
 523                 token = pvt->cd.call_token ? ast_strdup(pvt->cd.call_token) : NULL;
 524                 ast_mutex_unlock(&pvt->lock);
 525                 h323_send_tone(token, digit);
 526                 if (token) {
 527                         ast_free(token);
 528                 }
 529         } else
 530                 ast_mutex_unlock(&pvt->lock);
 531         oh323_update_info(c);
 532         return 0;
 533 }
 534
 535 /*! \brief
 536  * Send (play) the specified digit to the channel.
 537  *
 538  */
 539 static int oh323_digit_end(struct ast_channel *c, char digit, unsigned int duration)
 540 {
 541         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
 542         char *token;
 543
 544         if (!pvt) {
 545                 ast_log(LOG_ERROR, "No private structure?! This is bad\n");
 546                 return -1;
 547         }
 548         ast_mutex_lock(&pvt->lock);
 549         if (pvt->rtp && (pvt->options.dtmfmode & H323_DTMF_RFC2833) && ((pvt->dtmf_pt[0] > 0) || (pvt->dtmf_pt[0] > 0))) {
 550                 /* out-of-band DTMF */
 551                 if (h323debug) {
 552                         ast_log(LOG_DTMF, "End sending out-of-band digit %c on %s, duration %d\n", digit, c->name, duration);
 553                 }
 554                 ast_rtp_senddigit_end(pvt->rtp, digit);
 555                 ast_mutex_unlock(&pvt->lock);
 556         } else {
 557                 /* in-band DTMF */
 558                 if (h323debug) {
 559                         ast_log(LOG_DTMF, "End sending inband digit %c on %s, duration %d\n", digit, c->name, duration);
 560                 }
 561                 pvt->txDtmfDigit = ' ';
 562                 token = pvt->cd.call_token ? ast_strdup(pvt->cd.call_token) : NULL;
 563                 ast_mutex_unlock(&pvt->lock);
 564                 h323_send_tone(token, ' ');
 565                 if (token) {
 566                         ast_free(token);
 567                 }
 568         }
 569         oh323_update_info(c);
 570         return 0;
 571 }
 572
 573 /*! \brief
 574  * Make a call over the specified channel to the specified
 575  * destination.
 576  * Returns -1 on error, 0 on success.
 577  */
 578 static int oh323_call(struct ast_channel *c, char *dest, int timeout)
 579 {
 580         int res = 0;
 581         struct oh323_pvt *pvt = (struct oh323_pvt *)c->tech_pvt;
 582         const char *addr;
 583         char called_addr[1024];
 584
 585         if (h323debug) {
 586                 ast_debug(1, "Calling to %s on %s\n", dest, c->name);
 587         }
 588         if ((c->_state != AST_STATE_DOWN) && (c->_state != AST_STATE_RESERVED)) {
 589                 ast_log(LOG_WARNING, "Line is already in use (%s)\n", c->name);
 590                 return -1;
 591         }
 592         ast_mutex_lock(&pvt->lock);
 593         if (!gatekeeper_disable) {
 594                 if (ast_strlen_zero(pvt->exten)) {
 595                         ast_copy_string(called_addr, dest, sizeof(called_addr));
 596                 } else {
 597                         snprintf(called_addr, sizeof(called_addr), "%s@%s", pvt->exten, dest);
 598                 }
 599         } else {
 600                 res = htons(pvt->sa.sin_port);
 601                 addr = ast_inet_ntoa(pvt->sa.sin_addr);
 602                 if (ast_strlen_zero(pvt->exten)) {
 603                         snprintf(called_addr, sizeof(called_addr), "%s:%d", addr, res);
 604                 } else {
 605                         snprintf(called_addr, sizeof(called_addr), "%s@%s:%d", pvt->exten, addr, res);
 606                 }
 607         }
 608         /* make sure null terminated */
 609         called_addr[sizeof(called_addr) - 1] = '\0';
 610
 611         if (c->cid.cid_num)
 612                 ast_copy_string(pvt->options.cid_num, c->cid.cid_num, sizeof(pvt->options.cid_num));
 613
 614         if (c->cid.cid_name)
 615                 ast_copy_string(pvt->options.cid_name, c->cid.cid_name, sizeof(pvt->options.cid_name));
 616
 617         if (c->cid.cid_rdnis) {
 618                 ast_copy_string(pvt->options.cid_rdnis, c->cid.cid_rdnis, sizeof(pvt->options.cid_rdnis));
 619         }
 620
 621         pvt->options.presentation = c->cid.cid_pres;
 622         pvt->options.type_of_number = c->cid.cid_ton;
 623
 624         if ((addr = pbx_builtin_getvar_helper(c, "PRIREDIRECTREASON"))) {
 625                 if (!strcasecmp(addr, "UNKNOWN"))
 626                         pvt->options.redirect_reason = 0;
 627                 else if (!strcasecmp(addr, "BUSY"))
 628                         pvt->options.redirect_reason = 1;
 629                 else if (!strcasecmp(addr, "NO_REPLY"))
 630                         pvt->options.redirect_reason = 2;
 631                 else if (!strcasecmp(addr, "UNCONDITIONAL"))
 632                         pvt->options.redirect_reason = 15;
 633                 else
 634                         pvt->options.redirect_reason = -1;
 635         } else
 636                 pvt->options.redirect_reason = -1;
 637
 638         pvt->options.transfer_capability = c->transfercapability;
 639
 640         /* indicate that this is an outgoing call */
 641         pvt->outgoing = 1;
 642
 643         ast_verb(3, "Requested transfer capability: 0x%.2x - %s\n", c->transfercapability, ast_transfercapability2str(c->transfercapability));
 644         if (h323debug)
 645                 ast_debug(1, "Placing outgoing call to %s, %d/%d\n", called_addr, pvt->options.dtmfcodec[0], pvt->options.dtmfcodec[1]);
 646         ast_mutex_unlock(&pvt->lock);
 647         res = h323_make_call(called_addr, &(pvt->cd), &pvt->options);
 648         if (res) {
 649                 ast_log(LOG_NOTICE, "h323_make_call failed(%s)\n", c->name);
 650                 return -1;
 651         }
 652         oh323_update_info(c);
 653         return 0;
 654 }
 655
 656 static int oh323_answer(struct ast_channel *c)
 657 {
 658         int res;
 659         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
 660         char *token;
 661
 662         if (h323debug)
 663                 ast_debug(1, "Answering on %s\n", c->name);
 664
 665         ast_mutex_lock(&pvt->lock);
 666         token = pvt->cd.call_token ? ast_strdup(pvt->cd.call_token) : NULL;
 667         ast_mutex_unlock(&pvt->lock);
 668         res = h323_answering_call(token, 0);
 669         if (token)
 670                 ast_free(token);
 671
 672         oh323_update_info(c);
 673         if (c->_state != AST_STATE_UP) {
 674                 ast_setstate(c, AST_STATE_UP);
 675         }
 676         return res;
 677 }
 678
 679 static int oh323_hangup(struct ast_channel *c)
 680 {
 681         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
 682         int q931cause = AST_CAUSE_NORMAL_CLEARING;
 683         char *call_token;
 684
 685
 686         if (h323debug)
 687                 ast_debug(1, "Hanging up and scheduling destroy of call %s\n", c->name);
 688
 689         if (!c->tech_pvt) {
 690                 ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
 691                 return 0;
 692         }
 693         ast_mutex_lock(&pvt->lock);
 694         /* Determine how to disconnect */
 695         if (pvt->owner != c) {
 696                 ast_log(LOG_WARNING, "Huh?  We aren't the owner?\n");
 697                 ast_mutex_unlock(&pvt->lock);
 698                 return 0;
 699         }
 700
 701         pvt->owner = NULL;
 702         c->tech_pvt = NULL;
 703
 704         if (c->hangupcause) {
 705                 q931cause = c->hangupcause;
 706         } else {
 707                 const char *cause = pbx_builtin_getvar_helper(c, "DIALSTATUS");
 708                 if (cause) {
 709                         if (!strcmp(cause, "CONGESTION")) {
 710                                 q931cause = AST_CAUSE_NORMAL_CIRCUIT_CONGESTION;
 711                         } else if (!strcmp(cause, "BUSY")) {
 712                                 q931cause = AST_CAUSE_USER_BUSY;
 713                         } else if (!strcmp(cause, "CHANISUNVAIL")) {
 714                                 q931cause = AST_CAUSE_REQUESTED_CHAN_UNAVAIL;
 715                         } else if (!strcmp(cause, "NOANSWER")) {
 716                                 q931cause = AST_CAUSE_NO_ANSWER;
 717                         } else if (!strcmp(cause, "CANCEL")) {
 718                                 q931cause = AST_CAUSE_CALL_REJECTED;
 719                         }
 720                 }
 721         }
 722
 723         /* Start the process if it's not already started */
 724         if (!pvt->alreadygone && !pvt->hangupcause) {
 725                 call_token = pvt->cd.call_token ? ast_strdup(pvt->cd.call_token) : NULL;
 726                 if (call_token) {
 727                         /* Release lock to eliminate deadlock */
 728                         ast_mutex_unlock(&pvt->lock);
 729                         if (h323_clear_call(call_token, q931cause)) {
 730                                 ast_log(LOG_WARNING, "ClearCall failed.\n");
 731                         }
 732                         ast_free(call_token);
 733                         ast_mutex_lock(&pvt->lock);
 734                 }
 735         }
 736         pvt->needdestroy = 1;
 737         ast_mutex_unlock(&pvt->lock);
 738
 739         /* Update usage counter */
 740         ast_module_unref(ast_module_info->self);
 741
 742         return 0;
 743 }
 744
 745 /*! \brief Retrieve audio/etc from channel. Assumes pvt->lock is already held. */
 746 static struct ast_frame *oh323_rtp_read(struct oh323_pvt *pvt)
 747 {
 748         struct ast_frame *f;
 749
 750         /* Only apply it for the first packet, we just need the correct ip/port */
 751         if (pvt->options.nat) {
 752                 ast_rtp_setnat(pvt->rtp, pvt->options.nat);
 753                 pvt->options.nat = 0;
 754         }
 755
 756         f = ast_rtp_read(pvt->rtp);
 757         /* Don't send RFC2833 if we're not supposed to */
 758         if (f && (f->frametype == AST_FRAME_DTMF) && !(pvt->options.dtmfmode & (H323_DTMF_RFC2833 | H323_DTMF_CISCO))) {
 759                 return &ast_null_frame;
 760         }
 761         if (pvt->owner) {
 762                 /* We already hold the channel lock */
 763                 if (f->frametype == AST_FRAME_VOICE) {
 764                         if (f->subclass != pvt->owner->nativeformats) {
 765                                 /* Try to avoid deadlock */
 766                                 if (ast_channel_trylock(pvt->owner)) {
 767                                         ast_log(LOG_NOTICE, "Format changed but channel is locked. Ignoring frame...\n");
 768                                         return &ast_null_frame;
 769                                 }
 770                                 if (h323debug)
 771                                         ast_debug(1, "Oooh, format changed to %d\n", f->subclass);
 772                                 pvt->owner->nativeformats = f->subclass;
 773                                 pvt->nativeformats = f->subclass;
 774                                 ast_set_read_format(pvt->owner, pvt->owner->readformat);
 775                                 ast_set_write_format(pvt->owner, pvt->owner->writeformat);
 776                                 ast_channel_unlock(pvt->owner);
 777                         }
 778                         /* Do in-band DTMF detection */
 779                         if ((pvt->options.dtmfmode & H323_DTMF_INBAND) && pvt->vad) {
 780                                 if ((pvt->nativeformats & (AST_FORMAT_SLINEAR | AST_FORMAT_ALAW | AST_FORMAT_ULAW))) {
 781                                         if (!ast_channel_trylock(pvt->owner)) {
 782                                                 f = ast_dsp_process(pvt->owner, pvt->vad, f);
 783                                                 ast_channel_unlock(pvt->owner);
 784                                         }
 785                                         else
 786                                                 ast_log(LOG_NOTICE, "Unable to process inband DTMF while channel is locked\n");
 787                                 } else if (pvt->nativeformats && !pvt->noInbandDtmf) {
 788                                         ast_log(LOG_NOTICE, "Inband DTMF is not supported on codec %s. Use RFC2833\n", ast_getformatname(f->subclass));
 789                                         pvt->noInbandDtmf = 1;
 790                                 }
 791                                 if (f &&(f->frametype == AST_FRAME_DTMF)) {
 792                                         if (h323debug)
 793                                                 ast_log(LOG_DTMF, "Received in-band digit %c.\n", f->subclass);
 794                                 }
 795                         }
 796                 }
 797         }
 798         return f;
 799 }
 800
 801 static struct ast_frame *oh323_read(struct ast_channel *c)
 802 {
 803         struct ast_frame *fr;
 804         struct oh323_pvt *pvt = (struct oh323_pvt *)c->tech_pvt;
 805         ast_mutex_lock(&pvt->lock);
 806         __oh323_update_info(c, pvt);
 807         switch(c->fdno) {
 808         case 0:
 809                 fr = oh323_rtp_read(pvt);
 810                 break;
 811         case 1:
 812                 if (pvt->rtp)
 813                         fr = ast_rtcp_read(pvt->rtp);
 814                 else
 815                         fr = &ast_null_frame;
 816                 break;
 817         default:
 818                 ast_log(LOG_ERROR, "Unable to handle fd %d on channel %s\n", c->fdno, c->name);
 819                 fr = &ast_null_frame;
 820                 break;
 821         }
 822         ast_mutex_unlock(&pvt->lock);
 823         return fr;
 824 }
 825
 826 static int oh323_write(struct ast_channel *c, struct ast_frame *frame)
 827 {
 828         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
 829         int res = 0;
 830         if (frame->frametype != AST_FRAME_VOICE) {
 831                 if (frame->frametype == AST_FRAME_IMAGE) {
 832                         return 0;
 833                 } else {
 834                         ast_log(LOG_WARNING, "Can't send %d type frames with H323 write\n", frame->frametype);
 835                         return 0;
 836                 }
 837         } else {
 838                 if (!(frame->subclass & c->nativeformats)) {
 839                         ast_log(LOG_WARNING, "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
 840                                 frame->subclass, c->nativeformats, c->readformat, c->writeformat);
 841                         return 0;
 842                 }
 843         }
 844         if (pvt) {
 845                 ast_mutex_lock(&pvt->lock);
 846                 if (pvt->rtp && !pvt->recvonly)
 847                         res = ast_rtp_write(pvt->rtp, frame);
 848                 __oh323_update_info(c, pvt);
 849                 ast_mutex_unlock(&pvt->lock);
 850         }
 851         return res;
 852 }
 853
 854 static int oh323_indicate(struct ast_channel *c, int condition, const void *data, size_t datalen)
 855 {
 856
 857         struct oh323_pvt *pvt = (struct oh323_pvt *) c->tech_pvt;
 858         char *token = (char *)NULL;
 859         int res = -1;
 860         int got_progress;
 861
 862         ast_mutex_lock(&pvt->lock);
 863         token = (pvt->cd.call_token ? ast_strdup(pvt->cd.call_token) : NULL);
 864         got_progress = pvt->got_progress;
 865         if (condition == AST_CONTROL_PROGRESS)
 866                 pvt->got_progress = 1;
 867         else if ((condition == AST_CONTROL_BUSY) || (condition == AST_CONTROL_CONGESTION))
 868                 pvt->alreadygone = 1;
 869         ast_mutex_unlock(&pvt->lock);
 870
 871         if (h323debug)
 872                 ast_debug(1, "OH323: Indicating %d on %s (%s)\n", condition, token, c->name);
 873
 874         switch(condition) {
 875         case AST_CONTROL_RINGING:
 876                 if (c->_state == AST_STATE_RING || c->_state == AST_STATE_RINGING) {
 877                         h323_send_alerting(token);
 878                         res = (got_progress ? 0 : -1);  /* Do not simulate any audio tones if we got PROGRESS message */
 879                 }
 880                 break;
 881         case AST_CONTROL_PROGRESS:
 882                 if (c->_state != AST_STATE_UP) {
 883                         /* Do not send PROGRESS message more than once */
 884                         if (!got_progress)
 885                                 h323_send_progress(token);
 886                         res = 0;
 887                 }
 888                 break;
 889         case AST_CONTROL_BUSY:
 890                 if (c->_state != AST_STATE_UP) {
 891                         h323_answering_call(token, 1);
 892                         ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV);
 893                         res = 0;
 894                 }
 895                 break;
 896         case AST_CONTROL_CONGESTION:
 897                 if (c->_state != AST_STATE_UP) {
 898                         h323_answering_call(token, 1);
 899                         ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV);
 900                         res = 0;
 901                 }
 902                 break;
 903         case AST_CONTROL_HOLD:
 904                 h323_hold_call(token, 1);
 905                 /* We should start MOH only if remote party isn't provide audio for us */
 906                 ast_moh_start(c, data, NULL);
 907                 res = 0;
 908                 break;
 909         case AST_CONTROL_UNHOLD:
 910                 h323_hold_call(token, 0);
 911                 ast_moh_stop(c);
 912                 res = 0;
 913                 break;
 914         case AST_CONTROL_SRCUPDATE:
 915                 ast_rtp_new_source(pvt->rtp);
 916                 res = 0;
 917                 break;
 918         case AST_CONTROL_PROCEEDING:
 919         case -1:
 920                 break;
 921         default:
 922                 ast_log(LOG_WARNING, "OH323: Don't know how to indicate condition %d on %s\n", condition, token);
 923                 break;
 924         }
 925
 926         if (h323debug)
 927                 ast_debug(1, "OH323: Indicated %d on %s, res=%d\n", condition, token, res);
 928         if (token)
 929                 ast_free(token);
 930         oh323_update_info(c);
 931
 932         return res;
 933 }
 934
 935 static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
 936 {
 937         struct oh323_pvt *pvt = (struct oh323_pvt *) newchan->tech_pvt;
 938
 939         ast_mutex_lock(&pvt->lock);
 940         if (pvt->owner != oldchan) {
 941                 ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, pvt->owner);
 942                 return -1;
 943         }
 944         pvt->owner = newchan;
 945         ast_mutex_unlock(&pvt->lock);
 946         return 0;
 947 }
 948
 949 static int __oh323_rtp_create(struct oh323_pvt *pvt)
 950 {
 951         struct in_addr our_addr;
 952
 953         if (pvt->rtp)
 954                 return 0;
 955
 956         if (ast_find_ourip(&our_addr, bindaddr)) {
 957                 ast_mutex_unlock(&pvt->lock);
 958                 ast_log(LOG_ERROR, "Unable to locate local IP address for RTP stream\n");
 959                 return -1;
 960         }
 961         pvt->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, our_addr);
 962         if (!pvt->rtp) {
 963                 ast_mutex_unlock(&pvt->lock);
 964                 ast_log(LOG_WARNING, "Unable to create RTP session: %s\n", strerror(errno));
 965                 return -1;
 966         }
 967         if (h323debug)
 968                 ast_debug(1, "Created RTP channel\n");
 969
 970         ast_rtp_setqos(pvt->rtp, tos, cos, "H323 RTP");
 971
 972         if (h323debug)
 973                 ast_debug(1, "Setting NAT on RTP to %d\n", pvt->options.nat);
 974         ast_rtp_setnat(pvt->rtp, pvt->options.nat);
 975
 976         if (pvt->dtmf_pt[0] > 0)
 977                 ast_rtp_set_rtpmap_type(pvt->rtp, pvt->dtmf_pt[0], "audio", "telephone-event", 0);
 978         if (pvt->dtmf_pt[1] > 0)
 979                 ast_rtp_set_rtpmap_type(pvt->rtp, pvt->dtmf_pt[1], "audio", "cisco-telephone-event", 0);
 980
 981         if (pvt->peercapability)
 982                 ast_rtp_codec_setpref(pvt->rtp, &pvt->peer_prefs);
 983
 984         if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
 985                 ast_jb_configure(pvt->owner, &global_jbconf);
 986                 ast_channel_set_fd(pvt->owner, 0, ast_rtp_fd(pvt->rtp));
 987                 ast_channel_set_fd(pvt->owner, 1, ast_rtcp_fd(pvt->rtp));
 988                 ast_queue_frame(pvt->owner, &ast_null_frame);   /* Tell Asterisk to apply changes */
 989                 ast_channel_unlock(pvt->owner);
 990         } else
 991                 pvt->update_rtp_info = 1;
 992
 993         return 0;
 994 }
 995
 996 /*! \brief Private structure should be locked on a call */
 997 static struct ast_channel *__oh323_new(struct oh323_pvt *pvt, int state, const char *host)
 998 {
 999         struct ast_channel *ch;
1000         char *cid_num, *cid_name;
1001         int fmt;
1002
1003         if (!ast_strlen_zero(pvt->options.cid_num))
1004                 cid_num = pvt->options.cid_num;
1005         else
1006                 cid_num = pvt->cd.call_source_e164;
1007
1008         if (!ast_strlen_zero(pvt->options.cid_name))
1009                 cid_name = pvt->options.cid_name;
1010         else
1011                 cid_name = pvt->cd.call_source_name;
1012
1013         /* Don't hold a oh323_pvt lock while we allocate a chanel */
1014         ast_mutex_unlock(&pvt->lock);
1015         ch = ast_channel_alloc(1, state, cid_num, cid_name, pvt->accountcode, pvt->exten, pvt->context, pvt->amaflags, "H323/%s", host);
1016         /* Update usage counter */
1017         ast_module_ref(ast_module_info->self);
1018         ast_mutex_lock(&pvt->lock);
1019         if (ch) {
1020                 ch->tech = &oh323_tech;
1021                 if (!(fmt = pvt->jointcapability) && !(fmt = pvt->options.capability))
1022                         fmt = global_options.capability;
1023                 ch->nativeformats = ast_codec_choose(&pvt->options.prefs, fmt, 1)/* | (pvt->jointcapability & AST_FORMAT_VIDEO_MASK)*/;
1024                 pvt->nativeformats = ch->nativeformats;
1025                 fmt = ast_best_codec(ch->nativeformats);
1026                 ch->writeformat = fmt;
1027                 ch->rawwriteformat = fmt;
1028                 ch->readformat = fmt;
1029                 ch->rawreadformat = fmt;
1030                 if (!pvt->rtp)
1031                         __oh323_rtp_create(pvt);
1032 #if 0
1033                 ast_channel_set_fd(ch, 0, ast_rtp_fd(pvt->rtp));
1034                 ast_channel_set_fd(ch, 1, ast_rtcp_fd(pvt->rtp));
1035 #endif
1036 #ifdef VIDEO_SUPPORT
1037                 if (pvt->vrtp) {
1038                         ast_channel_set_fd(ch, 2, ast_rtp_fd(pvt->vrtp));
1039                         ast_channel_set_fd(ch, 3, ast_rtcp_fd(pvt->vrtp));
1040                 }
1041 #endif
1042 #ifdef T38_SUPPORT
1043                 if (pvt->udptl) {
1044                         ast_channel_set_fd(ch, 4, ast_udptl_fd(pvt->udptl));
1045                 }
1046 #endif
1047                 if (state == AST_STATE_RING) {
1048                         ch->rings = 1;
1049                 }
1050                 /* Allocate dsp for in-band DTMF support */
1051                 if (pvt->options.dtmfmode & H323_DTMF_INBAND) {
1052                         pvt->vad = ast_dsp_new();
1053                         ast_dsp_set_features(pvt->vad, DSP_FEATURE_DIGIT_DETECT);
1054                 }
1055                 /* Register channel functions. */
1056                 ch->tech_pvt = pvt;
1057                 /* Set the owner of this channel */
1058                 pvt->owner = ch;
1059
1060                 ast_copy_string(ch->context, pvt->context, sizeof(ch->context));
1061                 ast_copy_string(ch->exten, pvt->exten, sizeof(ch->exten));
1062                 ch->priority = 1;
1063                 if (!ast_strlen_zero(pvt->accountcode)) {
1064                         ast_string_field_set(ch, accountcode, pvt->accountcode);
1065                 }
1066                 if (pvt->amaflags) {
1067                         ch->amaflags = pvt->amaflags;
1068                 }
1069
1070                 /* Don't use ast_set_callerid() here because it will
1071                  * generate a needless NewCallerID event */
1072                 ch->cid.cid_ani = ast_strdup(cid_num);
1073
1074                 if (pvt->cd.redirect_reason >= 0) {
1075                         ch->cid.cid_rdnis = ast_strdup(pvt->cd.redirect_number);
1076                         pbx_builtin_setvar_helper(ch, "PRIREDIRECTREASON", redirectingreason2str(pvt->cd.redirect_reason));
1077                 }
1078                 ch->cid.cid_pres = pvt->cd.presentation;
1079                 ch->cid.cid_ton = pvt->cd.type_of_number;
1080
1081                 if (!ast_strlen_zero(pvt->exten) && strcmp(pvt->exten, "s")) {
1082                         ch->cid.cid_dnid = ast_strdup(pvt->exten);
1083                 }
1084                 if (pvt->cd.transfer_capability >= 0)
1085                         ch->transfercapability = pvt->cd.transfer_capability;
1086                 if (state != AST_STATE_DOWN) {
1087                         if (ast_pbx_start(ch)) {
1088                                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", ch->name);
1089                                 ast_hangup(ch);
1090                                 ch = NULL;
1091                         }
1092                 }
1093         } else {
1094                 ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
1095         }
1096         return ch;
1097 }
1098
1099 static struct oh323_pvt *oh323_alloc(int callid)
1100 {
1101         struct oh323_pvt *pvt;
1102
1103         pvt = ast_calloc(1, sizeof(*pvt));
1104         if (!pvt) {
1105                 ast_log(LOG_ERROR, "Couldn't allocate private structure. This is bad\n");
1106                 return NULL;
1107         }
1108         pvt->cd.redirect_reason = -1;
1109         pvt->cd.transfer_capability = -1;
1110         /* Ensure the call token is allocated for outgoing call */
1111         if (!callid) {
1112                 if ((pvt->cd).call_token == NULL) {
1113                         (pvt->cd).call_token = ast_calloc(1, 128);
1114                 }
1115                 if (!pvt->cd.call_token) {
1116                         ast_log(LOG_ERROR, "Not enough memory to alocate call token\n");
1117                         ast_rtp_destroy(pvt->rtp);
1118                         ast_free(pvt);
1119                         return NULL;
1120                 }
1121                 memset((char *)(pvt->cd).call_token, 0, 128);
1122                 pvt->cd.call_reference = callid;
1123         }
1124         memcpy(&pvt->options, &global_options, sizeof(pvt->options));
1125         pvt->jointcapability = pvt->options.capability;
1126         if (pvt->options.dtmfmode & (H323_DTMF_RFC2833 | H323_DTMF_CISCO)) {
1127                 pvt->nonCodecCapability |= AST_RTP_DTMF;
1128         } else {
1129                 pvt->nonCodecCapability &= ~AST_RTP_DTMF;
1130         }
1131         ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
1132         pvt->newstate = pvt->newcontrol = pvt->newdigit = pvt->update_rtp_info = pvt->DTMFsched = -1;
1133         ast_mutex_init(&pvt->lock);
1134         /* Add to interface list */
1135         ast_mutex_lock(&iflock);
1136         pvt->next = iflist;
1137         iflist = pvt;
1138         ast_mutex_unlock(&iflock);
1139         return pvt;
1140 }
1141
1142 static struct oh323_pvt *find_call_locked(int call_reference, const char *token)
1143 {
1144         struct oh323_pvt *pvt;
1145
1146         ast_mutex_lock(&iflock);
1147         pvt = iflist;
1148         while(pvt) {
1149                 if (!pvt->needdestroy && ((signed int)pvt->cd.call_reference == call_reference)) {
1150                         /* Found the call */
1151                         if ((token != NULL) && (pvt->cd.call_token != NULL) && (!strcmp(pvt->cd.call_token, token))) {
1152                                 ast_mutex_lock(&pvt->lock);
1153                                 ast_mutex_unlock(&iflock);
1154                                 return pvt;
1155                         } else if (token == NULL) {
1156                                 ast_log(LOG_WARNING, "Call Token is NULL\n");
1157                                 ast_mutex_lock(&pvt->lock);
1158                                 ast_mutex_unlock(&iflock);
1159                                 return pvt;
1160                         }
1161                 }
1162                 pvt = pvt->next;
1163         }
1164         ast_mutex_unlock(&iflock);
1165         return NULL;
1166 }
1167
1168 static int update_state(struct oh323_pvt *pvt, int state, int signal)
1169 {
1170         if (!pvt)
1171                 return 0;
1172         if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
1173                 if (state >= 0)
1174                         ast_setstate(pvt->owner, state);
1175                 if (signal >= 0)
1176                         ast_queue_control(pvt->owner, signal);
1177                 ast_channel_unlock(pvt->owner);
1178                 return 1;
1179         }
1180         else {
1181                 if (state >= 0)
1182                         pvt->newstate = state;
1183                 if (signal >= 0)
1184                         pvt->newcontrol = signal;
1185                 return 0;
1186         }
1187 }
1188
1189 static struct oh323_alias *build_alias(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
1190 {
1191         struct oh323_alias *alias;
1192         int found = 0;
1193
1194         alias = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&aliasl, name, name, 0, 0, strcasecmp);
1195
1196         if (alias)
1197                 found++;
1198         else {
1199                 if (!(alias = ast_calloc(1, sizeof(*alias))))
1200                         return NULL;
1201                 ASTOBJ_INIT(alias);
1202         }
1203         if (!found && name)
1204                 ast_copy_string(alias->name, name, sizeof(alias->name));
1205         for (; v || ((v = alt) && !(alt = NULL)); v = v->next) {
1206                 if (!strcasecmp(v->name, "e164")) {
1207                         ast_copy_string(alias->e164, v->value, sizeof(alias->e164));
1208                 } else if (!strcasecmp(v->name, "prefix")) {
1209                         ast_copy_string(alias->prefix, v->value, sizeof(alias->prefix));
1210                 } else if (!strcasecmp(v->name, "context")) {
1211                         ast_copy_string(alias->context, v->value, sizeof(alias->context));
1212                 } else if (!strcasecmp(v->name, "secret")) {
1213                         ast_copy_string(alias->secret, v->value, sizeof(alias->secret));
1214                 } else {
1215                         if (strcasecmp(v->value, "h323")) {
1216                                 ast_log(LOG_WARNING, "Keyword %s does not make sense in type=h323\n", v->name);
1217                         }
1218                 }
1219         }
1220         ASTOBJ_UNMARK(alias);
1221         return alias;
1222 }
1223
1224 static struct oh323_alias *realtime_alias(const char *alias)
1225 {
1226         struct ast_variable *var, *tmp;
1227         struct oh323_alias *a;
1228
1229         var = ast_load_realtime("h323", "name", alias, NULL);
1230
1231         if (!var)
1232                 return NULL;
1233
1234         for (tmp = var; tmp; tmp = tmp->next) {
1235                 if (!strcasecmp(tmp->name, "type") &&
1236                 !(!strcasecmp(tmp->value, "alias") || !strcasecmp(tmp->value, "h323"))) {
1237                         ast_variables_destroy(var);
1238                         return NULL;
1239                 }
1240         }
1241
1242         a = build_alias(alias, var, NULL, 1);
1243
1244         ast_variables_destroy(var);
1245
1246         return a;
1247 }
1248
1249 static int update_common_options(struct ast_variable *v, struct call_options *options)
1250 {
1251         int tmp;
1252         char *val, *opt;
1253
1254         if (!strcasecmp(v->name, "allow")) {
1255                 ast_parse_allow_disallow(&options->prefs, &options->capability, v->value, 1);
1256         } else if (!strcasecmp(v->name, "disallow")) {
1257                 ast_parse_allow_disallow(&options->prefs, &options->capability, v->value, 0);
1258         } else if (!strcasecmp(v->name, "dtmfmode")) {
1259                 val = ast_strdupa(v->value);
1260                 if ((opt = strchr(val, ':')) != (char *)NULL) {
1261                         *opt++ = '\0';
1262                         tmp = atoi(opt);
1263                 }
1264                 if (!strcasecmp(v->value, "inband")) {
1265                         options->dtmfmode |= H323_DTMF_INBAND;
1266                 } else if (!strcasecmp(val, "rfc2833")) {
1267                         options->dtmfmode |= H323_DTMF_RFC2833;
1268                         if (!opt) {
1269                                 options->dtmfcodec[0] = H323_DTMF_RFC2833_PT;
1270                         } else if ((tmp >= 96) && (tmp < 128)) {
1271                                 options->dtmfcodec[0] = tmp;
1272                         } else {
1273                                 options->dtmfcodec[0] = H323_DTMF_RFC2833_PT;
1274                                 ast_log(LOG_WARNING, "Unknown rfc2833 payload %s specified at line %d, using default %d\n", opt, v->lineno, options->dtmfcodec[0]);
1275                         }
1276                 } else if (!strcasecmp(val, "cisco")) {
1277                         options->dtmfmode |= H323_DTMF_CISCO;
1278                         if (!opt) {
1279                                 options->dtmfcodec[1] = H323_DTMF_CISCO_PT;
1280                         } else if ((tmp >= 96) && (tmp < 128)) {
1281                                 options->dtmfcodec[1] = tmp;
1282                         } else {
1283                                 options->dtmfcodec[1] = H323_DTMF_CISCO_PT;
1284                                 ast_log(LOG_WARNING, "Unknown Cisco DTMF payload %s specified at line %d, using default %d\n", opt, v->lineno, options->dtmfcodec[1]);
1285                         }
1286                 } else if (!strcasecmp(v->value, "h245-signal")) {
1287                         options->dtmfmode |= H323_DTMF_SIGNAL;
1288                 } else {
1289                         ast_log(LOG_WARNING, "Unknown dtmf mode '%s' at line %d\n", v->value, v->lineno);
1290                 }
1291         } else if (!strcasecmp(v->name, "dtmfcodec")) {
1292                 ast_log(LOG_NOTICE, "Option %s at line %d is deprecated. Use dtmfmode=rfc2833[:<payload>] instead.\n", v->name, v->lineno);
1293                 tmp = atoi(v->value);
1294                 if (tmp < 96)
1295                         ast_log(LOG_WARNING, "Invalid %s value %s at line %d\n", v->name, v->value, v->lineno);
1296                 else
1297                         options->dtmfcodec[0] = tmp;
1298         } else if (!strcasecmp(v->name, "bridge")) {
1299                 options->bridge = ast_true(v->value);
1300         } else if (!strcasecmp(v->name, "nat")) {
1301                 options->nat = ast_true(v->value);
1302         } else if (!strcasecmp(v->name, "fastStart")) {
1303                 options->fastStart = ast_true(v->value);
1304         } else if (!strcasecmp(v->name, "h245Tunneling")) {
1305                 options->h245Tunneling = ast_true(v->value);
1306         } else if (!strcasecmp(v->name, "silenceSuppression")) {
1307                 options->silenceSuppression = ast_true(v->value);
1308         } else if (!strcasecmp(v->name, "progress_setup")) {
1309                 tmp = atoi(v->value);
1310                 if ((tmp != 0) && (tmp != 1) && (tmp != 3) && (tmp != 8)) {
1311                         ast_log(LOG_WARNING, "Invalid value %s for %s at line %d, assuming 0\n", v->value, v->name, v->lineno);
1312                         tmp = 0;
1313                 }
1314                 options->progress_setup = tmp;
1315         } else if (!strcasecmp(v->name, "progress_alert")) {
1316                 tmp = atoi(v->value);
1317                 if ((tmp != 0) && (tmp != 1) && (tmp != 8)) {
1318                         ast_log(LOG_WARNING, "Invalid value %s for %s at line %d, assuming 0\n", v->value, v->name, v->lineno);
1319                         tmp = 0;
1320                 }
1321                 options->progress_alert = tmp;
1322         } else if (!strcasecmp(v->name, "progress_audio")) {
1323                 options->progress_audio = ast_true(v->value);
1324         } else if (!strcasecmp(v->name, "callerid")) {
1325                 ast_callerid_split(v->value, options->cid_name, sizeof(options->cid_name), options->cid_num, sizeof(options->cid_num));
1326         } else if (!strcasecmp(v->name, "fullname")) {
1327                 ast_copy_string(options->cid_name, v->value, sizeof(options->cid_name));
1328         } else if (!strcasecmp(v->name, "cid_number")) {
1329                 ast_copy_string(options->cid_num, v->value, sizeof(options->cid_num));
1330         } else if (!strcasecmp(v->name, "tunneling")) {
1331                 if (!strcasecmp(v->value, "none"))
1332                         options->tunnelOptions = 0;
1333                 else if (!strcasecmp(v->value, "cisco"))
1334                         options->tunnelOptions |= H323_TUNNEL_CISCO;
1335                 else if (!strcasecmp(v->value, "qsig"))
1336                         options->tunnelOptions |= H323_TUNNEL_QSIG;
1337                 else
1338                         ast_log(LOG_WARNING, "Invalid value %s for %s at line %d\n", v->value, v->name, v->lineno);
1339         } else if (!strcasecmp(v->name, "hold")) {
1340                 if (!strcasecmp(v->value, "none"))
1341                         options->holdHandling = ~0;
1342                 else if (!strcasecmp(v->value, "notify"))
1343                         options->holdHandling |= H323_HOLD_NOTIFY;
1344                 else if (!strcasecmp(v->value, "q931only"))
1345                         options->holdHandling |= H323_HOLD_NOTIFY | H323_HOLD_Q931ONLY;
1346                 else if (!strcasecmp(v->value, "h450"))
1347                         options->holdHandling |= H323_HOLD_H450;
1348                 else
1349                         ast_log(LOG_WARNING, "Invalid value %s for %s at line %d\n", v->value, v->name, v->lineno);
1350         } else
1351                 return 1;
1352
1353         return 0;
1354 }
1355
1356 static struct oh323_user *build_user(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
1357 {
1358         struct oh323_user *user;
1359         struct ast_ha *oldha;
1360         int found = 0;
1361         int format;
1362
1363         user = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&userl, name, name, 0, 0, strcmp);
1364
1365         if (user)
1366                 found++;
1367         else {
1368                 if (!(user = ast_calloc(1, sizeof(*user))))
1369                         return NULL;
1370                 ASTOBJ_INIT(user);
1371         }
1372         oldha = user->ha;
1373         user->ha = (struct ast_ha *)NULL;
1374         memcpy(&user->options, &global_options, sizeof(user->options));
1375         user->options.dtmfmode = 0;
1376         user->options.holdHandling = 0;
1377         /* Set default context */
1378         ast_copy_string(user->context, default_context, sizeof(user->context));
1379         if (user && !found)
1380                 ast_copy_string(user->name, name, sizeof(user->name));
1381
1382 #if 0 /* XXX Port channel variables functionality from chan_sip XXX */
1383         if (user->chanvars) {
1384                 ast_variables_destroy(user->chanvars);
1385                 user->chanvars = NULL;
1386         }
1387 #endif
1388
1389         for (; v || ((v = alt) && !(alt = NULL)); v = v->next) {
1390                 if (!update_common_options(v, &user->options))
1391                         continue;
1392                 if (!strcasecmp(v->name, "context")) {
1393                         ast_copy_string(user->context, v->value, sizeof(user->context));
1394                 } else if (!strcasecmp(v->name, "secret")) {
1395                         ast_copy_string(user->secret, v->value, sizeof(user->secret));
1396                 } else if (!strcasecmp(v->name, "accountcode")) {
1397                         ast_copy_string(user->accountcode, v->value, sizeof(user->accountcode));
1398                 } else if (!strcasecmp(v->name, "host")) {
1399                         if (!strcasecmp(v->value, "dynamic")) {
1400                                 ast_log(LOG_ERROR, "A dynamic host on a type=user does not make any sense\n");
1401                                 ASTOBJ_UNREF(user, oh323_destroy_user);
1402                                 return NULL;
1403                         } else if (ast_get_ip(&user->addr, v->value)) {
1404                                 ASTOBJ_UNREF(user, oh323_destroy_user);
1405                                 return NULL;
1406                         }
1407                         /* Let us know we need to use ip authentication */
1408                         user->host = 1;
1409                 } else if (!strcasecmp(v->name, "amaflags")) {
1410                         format = ast_cdr_amaflags2int(v->value);
1411                         if (format < 0) {
1412                                 ast_log(LOG_WARNING, "Invalid AMA Flags: %s at line %d\n", v->value, v->lineno);
1413                         } else {
1414                                 user->amaflags = format;
1415                         }
1416                 } else if (!strcasecmp(v->name, "permit") ||
1417                                         !strcasecmp(v->name, "deny")) {
1418                         int ha_error = 0;
1419
1420                         user->ha = ast_append_ha(v->name, v->value, user->ha, &ha_error);
1421                         if (ha_error)
1422                                 ast_log(LOG_ERROR, "Bad ACL entry in configuration line %d : %s\n", v->lineno, v->value);
1423                 }
1424         }
1425         if (!user->options.dtmfmode)
1426                 user->options.dtmfmode = global_options.dtmfmode;
1427         if (user->options.holdHandling == ~0)
1428                 user->options.holdHandling = 0;
1429         else if (!user->options.holdHandling)
1430                 user->options.holdHandling = global_options.holdHandling;
1431         ASTOBJ_UNMARK(user);
1432         ast_free_ha(oldha);
1433         return user;
1434 }
1435
1436 static struct oh323_user *realtime_user(const call_details_t *cd)
1437 {
1438         struct ast_variable *var, *tmp;
1439         struct oh323_user *user;
1440         const char *username;
1441
1442         if (userbyalias)
1443                 var = ast_load_realtime("h323", "name", username = cd->call_source_aliases, NULL);
1444         else {
1445                 username = (char *)NULL;
1446                 var = ast_load_realtime("h323", "host", cd->sourceIp, NULL);
1447         }
1448
1449         if (!var)
1450                 return NULL;
1451
1452         for (tmp = var; tmp; tmp = tmp->next) {
1453                 if (!strcasecmp(tmp->name, "type") &&
1454                 !(!strcasecmp(tmp->value, "user") || !strcasecmp(tmp->value, "friend"))) {
1455                         ast_variables_destroy(var);
1456                         return NULL;
1457                 } else if (!username && !strcasecmp(tmp->name, "name"))
1458                         username = tmp->value;
1459         }
1460
1461         if (!username) {
1462                 ast_log(LOG_WARNING, "Cannot determine user name for IP address %s\n", cd->sourceIp);
1463                 ast_variables_destroy(var);
1464                 return NULL;
1465         }
1466
1467         user = build_user(username, var, NULL, 1);
1468
1469         ast_variables_destroy(var);
1470
1471         return user;
1472 }
1473
1474 static struct oh323_peer *build_peer(const char *name, struct ast_variable *v, struct ast_variable *alt, int realtime)
1475 {
1476         struct oh323_peer *peer;
1477         struct ast_ha *oldha;
1478         int found = 0;
1479
1480         peer = ASTOBJ_CONTAINER_FIND_UNLINK_FULL(&peerl, name, name, 0, 0, strcmp);
1481
1482         if (peer)
1483                 found++;
1484         else {
1485                 if (!(peer = ast_calloc(1, sizeof(*peer))))
1486                         return NULL;
1487                 ASTOBJ_INIT(peer);
1488         }
1489         oldha = peer->ha;
1490         peer->ha = NULL;
1491         memcpy(&peer->options, &global_options, sizeof(peer->options));
1492         peer->options.dtmfmode = 0;
1493         peer->options.holdHandling = 0;
1494         peer->addr.sin_port = htons(h323_signalling_port);
1495         peer->addr.sin_family = AF_INET;
1496         if (!found && name)
1497                 ast_copy_string(peer->name, name, sizeof(peer->name));
1498
1499 #if 0 /* XXX Port channel variables functionality from chan_sip XXX */
1500         if (peer->chanvars) {
1501                 ast_variables_destroy(peer->chanvars);
1502                 peer->chanvars = NULL;
1503         }
1504 #endif
1505         /* Default settings for mailbox */
1506         peer->mailbox[0] = '\0';
1507
1508         for (; v || ((v = alt) && !(alt = NULL)); v = v->next) {
1509                 if (!update_common_options(v, &peer->options))
1510                         continue;
1511                 if (!strcasecmp(v->name, "host")) {
1512                         if (!strcasecmp(v->value, "dynamic")) {
1513                                 ast_log(LOG_ERROR, "Dynamic host configuration not implemented.\n");
1514                                 ASTOBJ_UNREF(peer, oh323_destroy_peer);
1515                                 return NULL;
1516                         }
1517                         if (ast_get_ip(&peer->addr, v->value)) {
1518                                 ast_log(LOG_ERROR, "Could not determine IP for %s\n", v->value);
1519                                 ASTOBJ_UNREF(peer, oh323_destroy_peer);
1520                                 return NULL;
1521                         }
1522                 } else if (!strcasecmp(v->name, "port")) {
1523                         peer->addr.sin_port = htons(atoi(v->value));
1524                 } else if (!strcasecmp(v->name, "permit") ||
1525                                         !strcasecmp(v->name, "deny")) {
1526                         int ha_error = 0;
1527
1528                         peer->ha = ast_append_ha(v->name, v->value, peer->ha, &ha_error);
1529                         if (ha_error)
1530                                 ast_log(LOG_ERROR, "Bad ACL entry in configuration line %d : %s\n", v->lineno, v->value);
1531                 } else if (!strcasecmp(v->name, "mailbox")) {
1532                         ast_copy_string(peer->mailbox, v->value, sizeof(peer->mailbox));
1533                 }
1534         }
1535         if (!peer->options.dtmfmode)
1536                 peer->options.dtmfmode = global_options.dtmfmode;
1537         if (peer->options.holdHandling == ~0)
1538                 peer->options.holdHandling = 0;
1539         else if (!peer->options.holdHandling)
1540                 peer->options.holdHandling = global_options.holdHandling;
1541         ASTOBJ_UNMARK(peer);
1542         ast_free_ha(oldha);
1543         return peer;
1544 }
1545
1546 static struct oh323_peer *realtime_peer(const char *peername, struct sockaddr_in *sin)
1547 {
1548         struct oh323_peer *peer;
1549         struct ast_variable *var;
1550         struct ast_variable *tmp;
1551         const char *addr;
1552
1553         /* First check on peer name */
1554         if (peername)
1555                 var = ast_load_realtime("h323", "name", peername, addr = NULL);
1556         else if (sin) /* Then check on IP address for dynamic peers */
1557                 var = ast_load_realtime("h323", "host", addr = ast_inet_ntoa(sin->sin_addr), NULL);
1558         else
1559                 return NULL;
1560
1561         if (!var)
1562                 return NULL;
1563
1564         for (tmp = var; tmp; tmp = tmp->next) {
1565                 /* If this is type=user, then skip this object. */
1566                 if (!strcasecmp(tmp->name, "type") &&
1567                                 !(!strcasecmp(tmp->value, "peer") || !strcasecmp(tmp->value, "friend"))) {
1568                         ast_variables_destroy(var);
1569                         return NULL;
1570                 } else if (!peername && !strcasecmp(tmp->name, "name")) {
1571                         peername = tmp->value;
1572                 }
1573         }
1574
1575         if (!peername) {        /* Did not find peer in realtime */
1576                 ast_log(LOG_WARNING, "Cannot determine peer name for IP address %s\n", addr);
1577                 ast_variables_destroy(var);
1578                 return NULL;
1579         }
1580
1581         /* Peer found in realtime, now build it in memory */
1582         peer = build_peer(peername, var, NULL, 1);
1583
1584         ast_variables_destroy(var);
1585
1586         return peer;
1587 }
1588
1589 static int oh323_addrcmp_str(struct in_addr inaddr, char *addr)
1590 {
1591         return strcmp(ast_inet_ntoa(inaddr), addr);
1592 }
1593
1594 static struct oh323_user *find_user(const call_details_t *cd, int realtime)
1595 {
1596         struct oh323_user *u;
1597
1598         if (userbyalias)
1599                 u = ASTOBJ_CONTAINER_FIND(&userl, cd->call_source_aliases);
1600         else
1601                 u = ASTOBJ_CONTAINER_FIND_FULL(&userl, cd->sourceIp, addr.sin_addr, 0, 0, oh323_addrcmp_str);
1602
1603         if (!u && realtime)
1604                 u = realtime_user(cd);
1605
1606         if (!u && h323debug)
1607                 ast_debug(1, "Could not find user by name %s or address %s\n", cd->call_source_aliases, cd->sourceIp);
1608
1609         return u;
1610 }
1611
1612 static int oh323_addrcmp(struct sockaddr_in addr, struct sockaddr_in *sin)
1613 {
1614         int res;
1615
1616         if (!sin)
1617                 res = -1;
1618         else
1619                 res = inaddrcmp(&addr , sin);
1620
1621         return res;
1622 }
1623
1624 static struct oh323_peer *find_peer(const char *peer, struct sockaddr_in *sin, int realtime)
1625 {
1626         struct oh323_peer *p;
1627
1628         if (peer)
1629                 p = ASTOBJ_CONTAINER_FIND(&peerl, peer);
1630         else
1631                 p = ASTOBJ_CONTAINER_FIND_FULL(&peerl, sin, addr, 0, 0, oh323_addrcmp);
1632
1633         if (!p && realtime)
1634                 p = realtime_peer(peer, sin);
1635
1636         if (!p && h323debug)
1637                 ast_debug(1, "Could not find peer by name %s or address %s\n", (peer ? peer : "<NONE>"), (sin ? ast_inet_ntoa(sin->sin_addr) : "<NONE>"));
1638
1639         return p;
1640 }
1641
1642 static int create_addr(struct oh323_pvt *pvt, char *opeer)
1643 {
1644         struct hostent *hp;
1645         struct ast_hostent ahp;
1646         struct oh323_peer *p;
1647         int portno;
1648         int found = 0;
1649         char *port;
1650         char *hostn;
1651         char peer[256] = "";
1652
1653         ast_copy_string(peer, opeer, sizeof(peer));
1654         port = strchr(peer, ':');
1655         if (port) {
1656                 *port = '\0';
1657                 port++;
1658         }
1659         pvt->sa.sin_family = AF_INET;
1660         p = find_peer(peer, NULL, 1);
1661         if (p) {
1662                 found++;
1663                 memcpy(&pvt->options, &p->options, sizeof(pvt->options));
1664                 pvt->jointcapability = pvt->options.capability;
1665                 if (pvt->options.dtmfmode) {
1666                         if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
1667                                 pvt->nonCodecCapability |= AST_RTP_DTMF;
1668                         } else {
1669                                 pvt->nonCodecCapability &= ~AST_RTP_DTMF;
1670                         }
1671                 }
1672                 if (p->addr.sin_addr.s_addr) {
1673                         pvt->sa.sin_addr = p->addr.sin_addr;
1674                         pvt->sa.sin_port = p->addr.sin_port;
1675                 }
1676                 ASTOBJ_UNREF(p, oh323_destroy_peer);
1677         }
1678         if (!p && !found) {
1679                 hostn = peer;
1680                 if (port) {
1681                         portno = atoi(port);
1682                 } else {
1683                         portno = h323_signalling_port;
1684                 }
1685                 hp = ast_gethostbyname(hostn, &ahp);
1686                 if (hp) {
1687                         memcpy(&pvt->sa.sin_addr, hp->h_addr, sizeof(pvt->sa.sin_addr));
1688                         pvt->sa.sin_port = htons(portno);
1689                         /* Look peer by address */
1690                         p = find_peer(NULL, &pvt->sa, 1);
1691                         memcpy(&pvt->options, (p ? &p->options : &global_options), sizeof(pvt->options));
1692                         pvt->jointcapability = pvt->options.capability;
1693                         if (p) {
1694                                 ASTOBJ_UNREF(p, oh323_destroy_peer);
1695                         }
1696                         if (pvt->options.dtmfmode) {
1697                                 if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
1698                                         pvt->nonCodecCapability |= AST_RTP_DTMF;
1699                                 } else {
1700                                         pvt->nonCodecCapability &= ~AST_RTP_DTMF;
1701                                 }
1702                         }
1703                         return 0;
1704                 } else {
1705                         ast_log(LOG_WARNING, "No such host: %s\n", peer);
1706                         return -1;
1707                 }
1708         } else if (!found) {
1709                 return -1;
1710         } else {
1711                 return 0;
1712         }
1713 }
1714 static struct ast_channel *oh323_request(const char *type, int format, void *data, int *cause)
1715 {
1716         int oldformat;
1717         struct oh323_pvt *pvt;
1718         struct ast_channel *tmpc = NULL;
1719         char *dest = (char *)data;
1720         char *ext, *host;
1721         char *h323id = NULL;
1722         char tmp[256], tmp1[256];
1723
1724         if (h323debug)
1725                 ast_debug(1, "type=%s, format=%d, data=%s.\n", type, format, (char *)data);
1726
1727         pvt = oh323_alloc(0);
1728         if (!pvt) {
1729                 ast_log(LOG_WARNING, "Unable to build pvt data for '%s'\n", (char *)data);
1730                 return NULL;
1731         }
1732         oldformat = format;
1733         format &= AST_FORMAT_AUDIO_MASK;
1734         if (!format) {
1735                 ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", format);
1736                 oh323_destroy(pvt);
1737                 if (cause)
1738                         *cause = AST_CAUSE_INCOMPATIBLE_DESTINATION;
1739                 return NULL;
1740         }
1741         ast_copy_string(tmp, dest, sizeof(tmp));
1742         host = strchr(tmp, '@');
1743         if (host) {
1744                 *host = '\0';
1745                 host++;
1746                 ext = tmp;
1747         } else {
1748                 ext = strrchr(tmp, '/');
1749                 if (ext)
1750                         *ext++ = '\0';
1751                 host = tmp;
1752         }
1753         strtok_r(host, "/", &(h323id));
1754         if (!ast_strlen_zero(h323id)) {
1755                 h323_set_id(h323id);
1756         }
1757         if (ext) {
1758                 ast_copy_string(pvt->exten, ext, sizeof(pvt->exten));
1759         }
1760         if (h323debug)
1761                 ast_debug(1, "Extension: %s Host: %s\n", pvt->exten, host);
1762
1763         if (gatekeeper_disable) {
1764                 if (create_addr(pvt, host)) {
1765                         oh323_destroy(pvt);
1766                         if (cause)
1767                                 *cause = AST_CAUSE_DESTINATION_OUT_OF_ORDER;
1768                         return NULL;
1769                 }
1770         }
1771         else {
1772                 memcpy(&pvt->options, &global_options, sizeof(pvt->options));
1773                 pvt->jointcapability = pvt->options.capability;
1774                 if (pvt->options.dtmfmode) {
1775                         if (pvt->options.dtmfmode & H323_DTMF_RFC2833) {
1776                                 pvt->nonCodecCapability |= AST_RTP_DTMF;
1777                         } else {
1778                                 pvt->nonCodecCapability &= ~AST_RTP_DTMF;
1779                         }
1780                 }
1781         }
1782
1783         ast_mutex_lock(&caplock);
1784         /* Generate unique channel identifier */
1785         snprintf(tmp1, sizeof(tmp1)-1, "%s-%u", host, ++unique);
1786         tmp1[sizeof(tmp1)-1] = '\0';
1787         ast_mutex_unlock(&caplock);
1788
1789         ast_mutex_lock(&pvt->lock);
1790         tmpc = __oh323_new(pvt, AST_STATE_DOWN, tmp1);
1791         ast_mutex_unlock(&pvt->lock);
1792         if (!tmpc) {
1793                 oh323_destroy(pvt);
1794                 if (cause)
1795                         *cause = AST_CAUSE_NORMAL_TEMPORARY_FAILURE;
1796         }
1797         ast_update_use_count();
1798         restart_monitor();
1799         return tmpc;
1800 }
1801
1802 /*! \brief Find a call by alias */
1803 static struct oh323_alias *find_alias(const char *source_aliases, int realtime)
1804 {
1805         struct oh323_alias *a;
1806
1807         a = ASTOBJ_CONTAINER_FIND(&aliasl, source_aliases);
1808
1809         if (!a && realtime)
1810                 a = realtime_alias(source_aliases);
1811
1812         return a;
1813 }
1814
1815 /*! \brief
1816   * Callback for sending digits from H.323 up to asterisk
1817   *
1818   */
1819 static int receive_digit(unsigned call_reference, char digit, const char *token, int duration)
1820 {
1821         struct oh323_pvt *pvt;
1822         int res;
1823
1824         pvt = find_call_locked(call_reference, token);
1825         if (!pvt) {
1826                 ast_log(LOG_ERROR, "Received digit '%c' (%u ms) for call %s without private structure\n", digit, duration, token);
1827                 return -1;
1828         }
1829         if (h323debug)
1830                 ast_log(LOG_DTMF, "Received %s digit '%c' (%u ms) for call %s\n", (digit == ' ' ? "update for" : "new"), (digit == ' ' ? pvt->curDTMF : digit), duration, token);
1831
1832         if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
1833                 if (digit == '!')
1834                         res = ast_queue_control(pvt->owner, AST_CONTROL_FLASH);
1835                 else {
1836                         struct ast_frame f = {
1837                                 .frametype = AST_FRAME_DTMF_END,
1838                                 .subclass = digit,
1839                                 .samples = duration * 8,
1840                                 .len = duration,
1841                                 .src = "SEND_DIGIT",
1842                         };
1843                         if (digit == ' ') {             /* signalUpdate message */
1844                                 f.subclass = pvt->curDTMF;
1845                                 AST_SCHED_DEL(sched, pvt->DTMFsched);
1846                         } else {                                /* Regular input or signal message */
1847                                 if (pvt->DTMFsched >= 0) {
1848                                         /* We still don't send DTMF END from previous event, send it now */
1849                                         AST_SCHED_DEL(sched, pvt->DTMFsched);
1850                                         f.subclass = pvt->curDTMF;
1851                                         f.samples = f.len = 0;
1852                                         ast_queue_frame(pvt->owner, &f);
1853                                         /* Restore values */
1854                                         f.subclass = digit;
1855                                         f.samples = duration * 8;
1856                                         f.len = duration;
1857                                 }
1858                                 if (duration) {         /* This is a signal, signalUpdate follows */
1859                                         f.frametype = AST_FRAME_DTMF_BEGIN;
1860                                         pvt->DTMFsched = ast_sched_add(sched, duration, oh323_simulate_dtmf_end, pvt);
1861                                         if (h323debug)
1862                                                 ast_log(LOG_DTMF, "Scheduled DTMF END simulation for %d ms, id=%d\n", duration, pvt->DTMFsched);
1863                                 }
1864                                 pvt->curDTMF = digit;
1865                         }
1866                         res = ast_queue_frame(pvt->owner, &f);
1867                 }
1868                 ast_channel_unlock(pvt->owner);
1869         } else {
1870                 if (digit == '!')
1871                         pvt->newcontrol = AST_CONTROL_FLASH;
1872                 else {
1873                         pvt->newduration = duration;
1874                         pvt->newdigit = digit;
1875                 }
1876                 res = 0;
1877         }
1878         ast_mutex_unlock(&pvt->lock);
1879         return res;
1880 }
1881
1882 /*! \brief
1883   * Callback function used to inform the H.323 stack of the local rtp ip/port details
1884   *
1885   * \return Returns the local RTP information
1886   */
1887 static struct rtp_info *external_rtp_create(unsigned call_reference, const char * token)
1888 {
1889         struct oh323_pvt *pvt;
1890         struct sockaddr_in us;
1891         struct rtp_info *info;
1892
1893         info = ast_calloc(1, sizeof(*info));
1894         if (!info) {
1895                 ast_log(LOG_ERROR, "Unable to allocated info structure, this is very bad\n");
1896                 return NULL;
1897         }
1898         pvt = find_call_locked(call_reference, token);
1899         if (!pvt) {
1900                 ast_free(info);
1901                 ast_log(LOG_ERROR, "Unable to find call %s(%d)\n", token, call_reference);
1902                 return NULL;
1903         }
1904         if (!pvt->rtp)
1905                 __oh323_rtp_create(pvt);
1906         if (!pvt->rtp) {
1907                 ast_mutex_unlock(&pvt->lock);
1908                 ast_free(info);
1909                 ast_log(LOG_ERROR, "No RTP stream is available for call %s (%d)", token, call_reference);
1910                 return NULL;
1911         }
1912         /* figure out our local RTP port and tell the H.323 stack about it */
1913         ast_rtp_get_us(pvt->rtp, &us);
1914         ast_mutex_unlock(&pvt->lock);
1915
1916         ast_copy_string(info->addr, ast_inet_ntoa(us.sin_addr), sizeof(info->addr));
1917         info->port = ntohs(us.sin_port);
1918         if (h323debug)
1919                 ast_debug(1, "Sending RTP 'US' %s:%d\n", info->addr, info->port);
1920         return info;
1921 }
1922
1923 /*
1924  * Definition taken from rtp.c for rtpPayloadType because we need it here.
1925  */
1926
1927 struct rtpPayloadType {
1928         int isAstFormat;        /* whether the following code is an AST_FORMAT */
1929         int code;
1930 };
1931
1932 /*! \brief
1933   * Call-back function passing remote ip/port information from H.323 to asterisk
1934   *
1935   * Returns nothing
1936   */
1937 static void setup_rtp_connection(unsigned call_reference, const char *remoteIp, int remotePort, const char *token, int pt)
1938 {
1939         struct oh323_pvt *pvt;
1940         struct sockaddr_in them;
1941         struct rtpPayloadType rtptype;
1942         int nativeformats_changed;
1943         enum { NEED_NONE, NEED_HOLD, NEED_UNHOLD } rtp_change = NEED_NONE;
1944
1945         if (h323debug)
1946                 ast_debug(1, "Setting up RTP connection for %s\n", token);
1947
1948         /* Find the call or allocate a private structure if call not found */
1949         pvt = find_call_locked(call_reference, token);
1950         if (!pvt) {
1951                 ast_log(LOG_ERROR, "Something is wrong: rtp\n");
1952                 return;
1953         }
1954         if (pvt->alreadygone) {
1955                 ast_mutex_unlock(&pvt->lock);
1956                 return;
1957         }
1958
1959         if (!pvt->rtp)
1960                 __oh323_rtp_create(pvt);
1961
1962         if ((pt == 2) && (pvt->jointcapability & AST_FORMAT_G726_AAL2)) {
1963                 ast_rtp_set_rtpmap_type(pvt->rtp, pt, "audio", "G726-32", AST_RTP_OPT_G726_NONSTANDARD);
1964         }
1965
1966         them.sin_family = AF_INET;
1967         /* only works for IPv4 */
1968         them.sin_addr.s_addr = inet_addr(remoteIp);
1969         them.sin_port = htons(remotePort);
1970
1971         if (them.sin_addr.s_addr) {
1972                 ast_rtp_set_peer(pvt->rtp, &them);
1973                 if (pvt->recvonly) {
1974                         pvt->recvonly = 0;
1975                         rtp_change = NEED_UNHOLD;
1976                 }
1977         } else {
1978                 ast_rtp_stop(pvt->rtp);
1979                 if (!pvt->recvonly) {
1980                         pvt->recvonly = 1;
1981                         rtp_change = NEED_HOLD;
1982                 }
1983         }
1984
1985         /* Change native format to reflect information taken from OLC/OLCAck */
1986         nativeformats_changed = 0;
1987         if (pt != 128 && pvt->rtp) {    /* Payload type is invalid, so try to use previously decided */
1988                 rtptype = ast_rtp_lookup_pt(pvt->rtp, pt);
1989                 if (h323debug)
1990                         ast_debug(1, "Native format is set to %d from %d by RTP payload type %d\n", rtptype.code, pvt->nativeformats, pt);
1991                 if (pvt->nativeformats != rtptype.code) {
1992                         pvt->nativeformats = rtptype.code;
1993                         nativeformats_changed = 1;
1994                 }
1995         } else if (h323debug)
1996                 ast_log(LOG_NOTICE, "Payload type is unknown, formats isn't changed\n");
1997
1998         /* Don't try to lock the channel if nothing changed */
1999         if (nativeformats_changed || pvt->options.progress_audio || (rtp_change != NEED_NONE)) {
2000                 if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
2001                         /* Re-build translation path only if native format(s) has been changed */
2002                         if (pvt->owner->nativeformats != pvt->nativeformats) {
2003                                 if (h323debug)
2004                                         ast_debug(1, "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);
2005                                 pvt->owner->nativeformats = pvt->nativeformats;
2006                                 ast_set_read_format(pvt->owner, pvt->owner->readformat);
2007                                 ast_set_write_format(pvt->owner, pvt->owner->writeformat);
2008                         }
2009                         if (pvt->options.progress_audio)
2010                                 ast_queue_control(pvt->owner, AST_CONTROL_PROGRESS);
2011                         switch (rtp_change) {
2012                         case NEED_HOLD:
2013                                 ast_queue_control(pvt->owner, AST_CONTROL_HOLD);
2014                                 break;
2015                         case NEED_UNHOLD:
2016                                 ast_queue_control(pvt->owner, AST_CONTROL_UNHOLD);
2017                                 break;
2018                         default:
2019                                 break;
2020                         }
2021                         ast_channel_unlock(pvt->owner);
2022                 }
2023                 else {
2024                         if (pvt->options.progress_audio)
2025                                 pvt->newcontrol = AST_CONTROL_PROGRESS;
2026                         else if (rtp_change == NEED_HOLD)
2027                                 pvt->newcontrol = AST_CONTROL_HOLD;
2028                         else if (rtp_change == NEED_UNHOLD)
2029                                 pvt->newcontrol = AST_CONTROL_UNHOLD;
2030                         if (h323debug)
2031                                 ast_debug(1, "RTP connection preparation for %s is pending...\n", token);
2032                 }
2033         }
2034         ast_mutex_unlock(&pvt->lock);
2035
2036         if (h323debug)
2037                 ast_debug(1, "RTP connection prepared for %s\n", token);
2038
2039         return;
2040 }
2041
2042 /*! \brief
2043   *     Call-back function to signal asterisk that the channel has been answered
2044   * Returns nothing
2045   */
2046 static void connection_made(unsigned call_reference, const char *token)
2047 {
2048         struct oh323_pvt *pvt;
2049
2050         if (h323debug)
2051                 ast_debug(1, "Call %s answered\n", token);
2052
2053         pvt = find_call_locked(call_reference, token);
2054         if (!pvt) {
2055                 ast_log(LOG_ERROR, "Something is wrong: connection\n");
2056                 return;
2057         }
2058
2059         /* Inform asterisk about remote party connected only on outgoing calls */
2060         if (!pvt->outgoing) {
2061                 ast_mutex_unlock(&pvt->lock);
2062                 return;
2063         }
2064         /* Do not send ANSWER message more than once */
2065         if (!pvt->connection_established) {
2066                 pvt->connection_established = 1;
2067                 update_state(pvt, -1, AST_CONTROL_ANSWER);
2068         }
2069         ast_mutex_unlock(&pvt->lock);
2070         return;
2071 }
2072
2073 static int progress(unsigned call_reference, const char *token, int inband)
2074 {
2075         struct oh323_pvt *pvt;
2076
2077         if (h323debug)
2078                 ast_debug(1, "Received ALERT/PROGRESS message for %s tones\n", (inband ? "inband" : "self-generated"));
2079
2080         pvt = find_call_locked(call_reference, token);
2081         if (!pvt) {
2082                 ast_log(LOG_ERROR, "Private structure not found in progress.\n");
2083                 return -1;
2084         }
2085         if (!pvt->owner) {
2086                 ast_mutex_unlock(&pvt->lock);
2087                 ast_log(LOG_ERROR, "No Asterisk channel associated with private structure.\n");
2088                 return -1;
2089         }
2090         update_state(pvt, -1, (inband ? AST_CONTROL_PROGRESS : AST_CONTROL_RINGING));
2091         ast_mutex_unlock(&pvt->lock);
2092
2093         return 0;
2094 }
2095
2096 /*! \brief
2097  *  Call-back function for incoming calls
2098  *
2099  *  Returns 1 on success
2100  */
2101 static call_options_t *setup_incoming_call(call_details_t *cd)
2102 {
2103         struct oh323_pvt *pvt;
2104         struct oh323_user *user = NULL;
2105         struct oh323_alias *alias = NULL;
2106
2107         if (h323debug)
2108                 ast_debug(1, "Setting up incoming call for %s\n", cd->call_token);
2109
2110         /* allocate the call*/
2111         pvt = oh323_alloc(cd->call_reference);
2112
2113         if (!pvt) {
2114                 ast_log(LOG_ERROR, "Unable to allocate private structure, this is bad.\n");
2115                 cleanup_call_details(cd);
2116                 return NULL;
2117         }
2118
2119         /* Populate the call details in the private structure */
2120         memcpy(&pvt->cd, cd, sizeof(pvt->cd));
2121         memcpy(&pvt->options, &global_options, sizeof(pvt->options));
2122         pvt->jointcapability = pvt->options.capability;
2123
2124         if (h323debug) {
2125                 ast_verb(3, "Setting up Call\n");
2126                 ast_verb(3, " \tCall token:  [%s]\n", pvt->cd.call_token);
2127                 ast_verb(3, " \tCalling party name:  [%s]\n", pvt->cd.call_source_name);
2128                 ast_verb(3, " \tCalling party number:  [%s]\n", pvt->cd.call_source_e164);
2129                 ast_verb(3, " \tCalled party name:  [%s]\n", pvt->cd.call_dest_alias);
2130                 ast_verb(3, " \tCalled party number:  [%s]\n", pvt->cd.call_dest_e164);
2131                 if (pvt->cd.redirect_reason >= 0)
2132                         ast_verb(3, " \tRedirecting party number:  [%s] (reason %d)\n", pvt->cd.redirect_number, pvt->cd.redirect_reason);
2133                 ast_verb(3, " \tCalling party IP:  [%s]\n", pvt->cd.sourceIp);
2134         }
2135
2136         /* Decide if we are allowing Gatekeeper routed calls*/
2137         if ((!strcasecmp(cd->sourceIp, gatekeeper)) && (gkroute == -1) && !gatekeeper_disable) {
2138                 if (!ast_strlen_zero(cd->call_dest_e164)) {
2139                         ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
2140                         ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
2141                 } else {
2142                         alias = find_alias(cd->call_dest_alias, 1);
2143                         if (!alias) {
2144                                 ast_log(LOG_ERROR, "Call for %s rejected, alias not found\n", cd->call_dest_alias);
2145                                 oh323_destroy(pvt);
2146                                 return NULL;
2147                         }
2148                         ast_copy_string(pvt->exten, alias->name, sizeof(pvt->exten));
2149                         ast_copy_string(pvt->context, alias->context, sizeof(pvt->context));
2150                 }
2151         } else {
2152                 /* Either this call is not from the Gatekeeper
2153                    or we are not allowing gk routed calls */
2154                 user = find_user(cd, 1);
2155                 if (!user) {
2156                         if (!acceptAnonymous) {
2157                                 ast_log(LOG_NOTICE, "Anonymous call from '%s@%s' rejected\n", pvt->cd.call_source_aliases, pvt->cd.sourceIp);
2158                                 oh323_destroy(pvt);
2159                                 return NULL;
2160                         }
2161                         if (ast_strlen_zero(default_context)) {
2162                                 ast_log(LOG_ERROR, "Call from '%s@%s' rejected due to no default context\n", pvt->cd.call_source_aliases, pvt->cd.sourceIp);
2163                                 oh323_destroy(pvt);
2164                                 return NULL;
2165                         }
2166                         ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
2167                         if (!ast_strlen_zero(pvt->cd.call_dest_e164)) {
2168                                 ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
2169                         } else {
2170                                 ast_copy_string(pvt->exten, cd->call_dest_alias, sizeof(pvt->exten));
2171                         }
2172                         if (h323debug)
2173                                 ast_debug(1, "Sending %s@%s to context [%s] extension %s\n", cd->call_source_aliases, cd->sourceIp, pvt->context, pvt->exten);
2174                 } else {
2175                         if (user->host) {
2176                                 if (strcasecmp(cd->sourceIp, ast_inet_ntoa(user->addr.sin_addr))) {
2177                                         if (ast_strlen_zero(user->context)) {
2178                                                 if (ast_strlen_zero(default_context)) {
2179                                                         ast_log(LOG_ERROR, "Call from '%s' rejected due to non-matching IP address (%s) and no default context\n", user->name, cd->sourceIp);
2180                                                         oh323_destroy(pvt);
2181                                                         ASTOBJ_UNREF(user, oh323_destroy_user);
2182                                                         return NULL;
2183                                                 }
2184                                                 ast_copy_string(pvt->context, default_context, sizeof(pvt->context));
2185                                         } else {
2186                                                 ast_copy_string(pvt->context, user->context, sizeof(pvt->context));
2187                                         }
2188                                         pvt->exten[0] = 'i';
2189                                         pvt->exten[1] = '\0';
2190                                         ast_log(LOG_ERROR, "Call from '%s' rejected due to non-matching IP address (%s)s\n", user->name, cd->sourceIp);
2191                                         oh323_destroy(pvt);
2192                                         ASTOBJ_UNREF(user, oh323_destroy_user);
2193                                         return NULL;    /* XXX: Hmmm... Why to setup context if we drop connection immediately??? */
2194                                 }
2195                         }
2196                         ast_copy_string(pvt->context, user->context, sizeof(pvt->context));
2197                         memcpy(&pvt->options, &user->options, sizeof(pvt->options));
2198                         pvt->jointcapability = pvt->options.capability;
2199                         if (!ast_strlen_zero(pvt->cd.call_dest_e164)) {
2200                                 ast_copy_string(pvt->exten, cd->call_dest_e164, sizeof(pvt->exten));
2201                         } else {
2202                                 ast_copy_string(pvt->exten, cd->call_dest_alias, sizeof(pvt->exten));
2203                         }
2204                         if (!ast_strlen_zero(user->accountcode)) {
2205                                 ast_copy_string(pvt->accountcode, user->accountcode, sizeof(pvt->accountcode));
2206                         }
2207                         if (user->amaflags) {
2208                                 pvt->amaflags = user->amaflags;
2209                         }
2210                         ASTOBJ_UNREF(user, oh323_destroy_user);
2211                 }
2212         }
2213         return &pvt->options;
2214 }
2215
2216 /*! \brief
2217  * Call-back function to start PBX when OpenH323 ready to serve incoming call
2218  *
2219  * Returns 1 on success
2220  */
2221 static int answer_call(unsigned call_reference, const char *token)
2222 {
2223         struct oh323_pvt *pvt;
2224         struct ast_channel *c = NULL;
2225         enum {ext_original, ext_s, ext_i, ext_notexists} try_exten;
2226         char tmp_exten[sizeof(pvt->exten)];
2227
2228         if (h323debug)
2229                 ast_debug(1, "Preparing Asterisk to answer for %s\n", token);
2230
2231         /* Find the call or allocate a private structure if call not found */
2232         pvt = find_call_locked(call_reference, token);
2233         if (!pvt) {
2234                 ast_log(LOG_ERROR, "Something is wrong: answer_call\n");
2235                 return 0;
2236         }
2237         /* Check if requested extension@context pair exists in the dialplan */
2238         ast_copy_string(tmp_exten, pvt->exten, sizeof(tmp_exten));
2239
2240         /* Try to find best extension in specified context */
2241         if ((tmp_exten[0] != '\0') && (tmp_exten[1] == '\0')) {
2242                 if (tmp_exten[0] == 's')
2243                         try_exten = ext_s;
2244                 else if (tmp_exten[0] == 'i')
2245                         try_exten = ext_i;
2246                 else
2247                         try_exten = ext_original;
2248         } else
2249                 try_exten = ext_original;
2250         do {
2251                 if (ast_exists_extension(NULL, pvt->context, tmp_exten, 1, NULL))
2252                         break;
2253                 switch (try_exten) {
2254                 case ext_original:
2255                         tmp_exten[0] = 's';
2256                         tmp_exten[1] = '\0';
2257                         try_exten = ext_s;
2258                         break;
2259                 case ext_s:
2260                         tmp_exten[0] = 'i';
2261                         try_exten = ext_i;
2262                         break;
2263                 case ext_i:
2264                         try_exten = ext_notexists;
2265                         break;
2266                 default:
2267                         break;
2268                 }
2269         } while (try_exten != ext_notexists);
2270
2271         /* Drop the call if we don't have <exten>, s and i extensions */
2272         if (try_exten == ext_notexists) {
2273                 ast_log(LOG_NOTICE, "Dropping call because extensions '%s', 's' and 'i' doesn't exists in context [%s]\n", pvt->exten, pvt->context);
2274                 ast_mutex_unlock(&pvt->lock);
2275                 h323_clear_call(token, AST_CAUSE_UNALLOCATED);
2276                 return 0;
2277         } else if ((try_exten != ext_original) && (strcmp(pvt->exten, tmp_exten) != 0)) {
2278                 if (h323debug)
2279                         ast_debug(1, "Going to extension %s@%s because %s@%s isn't exists\n", tmp_exten, pvt->context, pvt->exten, pvt->context);
2280                 ast_copy_string(pvt->exten, tmp_exten, sizeof(pvt->exten));
2281         }
2282
2283         /* allocate a channel and tell asterisk about it */
2284         c = __oh323_new(pvt, AST_STATE_RINGING, pvt->cd.call_token);
2285
2286         /* And release when done */
2287         ast_mutex_unlock(&pvt->lock);
2288         if (!c) {
2289                 ast_log(LOG_ERROR, "Couldn't create channel. This is bad\n");
2290                 return 0;
2291         }
2292         return 1;
2293 }
2294
2295 /*! \brief
2296  * Call-back function to establish an outgoing H.323 call
2297  *
2298  * Returns 1 on success
2299  */
2300 static int setup_outgoing_call(call_details_t *cd)
2301 {
2302         /* Use argument here or free it immediately */
2303         cleanup_call_details(cd);
2304
2305         return 1;
2306 }
2307
2308 /*! \brief
2309   *  Call-back function to signal asterisk that the channel is ringing
2310   *  Returns nothing
2311   */
2312 static void chan_ringing(unsigned call_reference, const char *token)
2313 {
2314         struct oh323_pvt *pvt;
2315
2316         if (h323debug)
2317                 ast_debug(1, "Ringing on %s\n", token);
2318
2319         pvt = find_call_locked(call_reference, token);
2320         if (!pvt) {
2321                 ast_log(LOG_ERROR, "Something is wrong: ringing\n");
2322                 return;
2323         }
2324         if (!pvt->owner) {
2325                 ast_mutex_unlock(&pvt->lock);
2326                 ast_log(LOG_ERROR, "Channel has no owner\n");
2327                 return;
2328         }
2329         update_state(pvt, AST_STATE_RINGING, AST_CONTROL_RINGING);
2330         ast_mutex_unlock(&pvt->lock);
2331         return;
2332 }
2333
2334 /*! \brief
2335   * Call-back function to cleanup communication
2336   * Returns nothing,
2337   */
2338 static void cleanup_connection(unsigned call_reference, const char *call_token)
2339 {
2340         struct oh323_pvt *pvt;
2341
2342         if (h323debug)
2343                 ast_debug(1, "Cleaning connection to %s\n", call_token);
2344
2345         while (1) {
2346                 pvt = find_call_locked(call_reference, call_token);
2347                 if (!pvt) {
2348                         if (h323debug)
2349                                 ast_debug(1, "No connection for %s\n", call_token);
2350                         return;
2351                 }
2352                 if (!pvt->owner || !ast_channel_trylock(pvt->owner))
2353                         break;
2354 #if 1
2355                 ast_log(LOG_NOTICE, "Avoiding H.323 destory deadlock on %s\n", call_token);
2356 #ifdef DEBUG_THREADS
2357                 /* XXX to be completed
2358                  * If we want to print more info on who is holding the lock,
2359                  * implement the relevant code in lock.h and use the routines
2360                  * supplied there.
2361                  */
2362 #endif
2363 #endif
2364                 ast_mutex_unlock(&pvt->lock);
2365                 usleep(1);
2366         }
2367         if (pvt->rtp) {
2368                 /* Immediately stop RTP */
2369                 ast_rtp_destroy(pvt->rtp);
2370                 pvt->rtp = NULL;
2371         }
2372         /* Free dsp used for in-band DTMF detection */
2373         if (pvt->vad) {
2374                 ast_dsp_free(pvt->vad);
2375                 pvt->vad = NULL;
2376         }
2377         cleanup_call_details(&pvt->cd);
2378         pvt->alreadygone = 1;
2379         /* Send hangup */
2380         if (pvt->owner) {
2381                 pvt->owner->_softhangup |= AST_SOFTHANGUP_DEV;
2382                 ast_queue_hangup(pvt->owner);
2383                 ast_channel_unlock(pvt->owner);
2384         }
2385         ast_mutex_unlock(&pvt->lock);
2386         if (h323debug)
2387                 ast_debug(1, "Connection to %s cleaned\n", call_token);
2388         return;
2389 }
2390
2391 static void hangup_connection(unsigned int call_reference, const char *token, int cause)
2392 {
2393         struct oh323_pvt *pvt;
2394
2395         if (h323debug)
2396                 ast_debug(1, "Hanging up connection to %s with cause %d\n", token, cause);
2397
2398         pvt = find_call_locked(call_reference, token);
2399         if (!pvt) {
2400                 if (h323debug)
2401                         ast_debug(1, "Connection to %s already cleared\n", token);
2402                 return;
2403         }
2404         if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
2405                 pvt->owner->_softhangup |= AST_SOFTHANGUP_DEV;
2406                 pvt->owner->hangupcause = pvt->hangupcause = cause;
2407                 ast_queue_hangup(pvt->owner);
2408                 ast_channel_unlock(pvt->owner);
2409         }
2410         else {
2411                 pvt->needhangup = 1;
2412                 pvt->hangupcause = cause;
2413                 if (h323debug)
2414                         ast_debug(1, "Hangup for %s is pending\n", token);
2415         }
2416         ast_mutex_unlock(&pvt->lock);
2417 }
2418
2419 static void set_dtmf_payload(unsigned call_reference, const char *token, int payload, int is_cisco)
2420 {
2421         struct oh323_pvt *pvt;
2422
2423         if (h323debug)
2424                 ast_debug(1, "Setting %s DTMF payload to %d on %s\n", (is_cisco ? "Cisco" : "RFC2833"), payload, token);
2425
2426         pvt = find_call_locked(call_reference, token);
2427         if (!pvt) {
2428                 return;
2429         }
2430         if (pvt->rtp) {
2431                 ast_rtp_set_rtpmap_type(pvt->rtp, payload, "audio", (is_cisco ? "cisco-telephone-event" : "telephone-event"), 0);
2432         }
2433         pvt->dtmf_pt[is_cisco ? 1 : 0] = payload;
2434         ast_mutex_unlock(&pvt->lock);
2435         if (h323debug)
2436                 ast_debug(1, "DTMF payload on %s set to %d\n", token, payload);
2437 }
2438
2439 static void set_peer_capabilities(unsigned call_reference, const char *token, int capabilities, struct ast_codec_pref *prefs)
2440 {
2441         struct oh323_pvt *pvt;
2442
2443         if (h323debug)
2444                 ast_debug(1, "Got remote capabilities from connection %s\n", token);
2445
2446         pvt = find_call_locked(call_reference, token);
2447         if (!pvt)
2448                 return;
2449         pvt->peercapability = capabilities;
2450         pvt->jointcapability = pvt->options.capability & capabilities;
2451         if (prefs) {
2452                 memcpy(&pvt->peer_prefs, prefs, sizeof(pvt->peer_prefs));
2453                 if (h323debug) {
2454                         int i;
2455                         for (i = 0; i < 32; ++i) {
2456                                 if (!prefs->order[i])
2457                                         break;
2458                                 ast_debug(1, "prefs[%d]=%s:%d\n", i, (prefs->order[i] ? ast_getformatname(1 << (prefs->order[i]-1)) : "<none>"), prefs->framing[i]);
2459                         }
2460                 }
2461                 if (pvt->rtp)
2462                         ast_rtp_codec_setpref(pvt->rtp, &pvt->peer_prefs);
2463         }
2464         ast_mutex_unlock(&pvt->lock);
2465 }
2466
2467 static void set_local_capabilities(unsigned call_reference, const char *token)
2468 {
2469         struct oh323_pvt *pvt;
2470         int capability, dtmfmode, pref_codec;
2471         struct ast_codec_pref prefs;
2472
2473         if (h323debug)
2474                 ast_debug(1, "Setting capabilities for connection %s\n", token);
2475
2476         pvt = find_call_locked(call_reference, token);
2477         if (!pvt)
2478                 return;
2479         capability = (pvt->jointcapability) ? pvt->jointcapability : pvt->options.capability;
2480         dtmfmode = pvt->options.dtmfmode;
2481         prefs = pvt->options.prefs;
2482         pref_codec = pvt->pref_codec;
2483         ast_mutex_unlock(&pvt->lock);
2484         h323_set_capabilities(token, capability, dtmfmode, &prefs, pref_codec);
2485
2486         if (h323debug)
2487                 ast_debug(1, "Capabilities for connection %s is set\n", token);
2488 }
2489
2490 static void remote_hold(unsigned call_reference, const char *token, int is_hold)
2491 {
2492         struct oh323_pvt *pvt;
2493
2494         if (h323debug)
2495                 ast_debug(1, "Setting %shold status for connection %s\n", (is_hold ? "" : "un"), token);
2496
2497         pvt = find_call_locked(call_reference, token);
2498         if (!pvt)
2499                 return;
2500         if (pvt->owner && !ast_channel_trylock(pvt->owner)) {
2501                 if (is_hold)
2502                         ast_queue_control(pvt->owner, AST_CONTROL_HOLD);
2503                 else
2504                         ast_queue_control(pvt->owner, AST_CONTROL_UNHOLD);
2505                 ast_channel_unlock(pvt->owner);
2506         }
2507         else {
2508                 if (is_hold)
2509                         pvt->newcontrol = AST_CONTROL_HOLD;
2510                 else
2511                         pvt->newcontrol = AST_CONTROL_UNHOLD;
2512         }
2513         ast_mutex_unlock(&pvt->lock);
2514 }
2515
2516 static void *do_monitor(void *data)
2517 {
2518         int res;
2519         int reloading;
2520         struct oh323_pvt *oh323 = NULL;
2521
2522         for(;;) {
2523                 /* Check for a reload request */
2524                 ast_mutex_lock(&h323_reload_lock);
2525                 reloading = h323_reloading;
2526                 h323_reloading = 0;
2527                 ast_mutex_unlock(&h323_reload_lock);
2528                 if (reloading) {
2529                         ast_verb(1, "Reloading H.323\n");
2530                         h323_do_reload();
2531                 }
2532                 /* Check for interfaces needing to be killed */
2533                 if (!ast_mutex_trylock(&iflock)) {
2534 #if 1
2535                         do {
2536                                 for (oh323 = iflist; oh323; oh323 = oh323->next) {
2537                                         if (!ast_mutex_trylock(&oh323->lock)) {
2538                                                 if (oh323->needdestroy) {
2539                                                         __oh323_destroy(oh323);
2540                                                         break;
2541                                                 }
2542                                                 ast_mutex_unlock(&oh323->lock);
2543                                         }
2544                                 }
2545                         } while (/*oh323*/ 0);
2546 #else
2547 restartsearch:
2548                         oh323 = iflist;
2549                         while(oh323) {
2550                                 if (!ast_mutex_trylock(&oh323->lock)) {
2551                                         if (oh323->needdestroy) {
2552                                                 __oh323_destroy(oh323);
2553                                                 goto restartsearch;
2554                                         }
2555                                         ast_mutex_unlock(&oh323->lock);
2556                                         oh323 = oh323->next;
2557                                 }
2558                         }
2559 #endif
2560                         ast_mutex_unlock(&iflock);
2561                 } else
2562                         oh323 = (struct oh323_pvt *)1;  /* Force fast loop */
2563                 pthread_testcancel();
2564                 /* Wait for sched or io */
2565                 res = ast_sched_wait(sched);
2566                 if ((res < 0) || (res > 1000)) {
2567                         res = 1000;
2568                 }
2569                 /* Do not wait if some channel(s) is destroyed, probably, more available too */
2570                 if (oh323)
2571                         res = 1;
2572                 res = ast_io_wait(io, res);
2573                 pthread_testcancel();
2574                 ast_mutex_lock(&monlock);
2575                 if (res >= 0) {
2576                         ast_sched_runq(sched);
2577                 }
2578                 ast_mutex_unlock(&monlock);
2579         }
2580         /* Never reached */
2581         return NULL;
2582 }
2583
2584 static int restart_monitor(void)
2585 {
2586         /* If we're supposed to be stopped -- stay stopped */
2587         if (ast_mutex_lock(&monlock)) {
2588                 ast_log(LOG_WARNING, "Unable to lock monitor\n");
2589                 return -1;
2590         }
2591         if (monitor_thread == AST_PTHREADT_STOP) {
2592                 ast_mutex_unlock(&monlock);
2593                 return 0;
2594         }
2595         if (monitor_thread == pthread_self()) {
2596                 ast_mutex_unlock(&monlock);
2597                 ast_log(LOG_WARNING, "Cannot kill myself\n");
2598                 return -1;
2599         }
2600         if (monitor_thread && (monitor_thread != AST_PTHREADT_NULL)) {
2601                 /* Wake up the thread */
2602                 pthread_kill(monitor_thread, SIGURG);
2603         } else {
2604                 /* Start a new monitor */
2605                 if (ast_pthread_create_detached_background(&monitor_thread, NULL, do_monitor, NULL) < 0) {
2606                         monitor_thread = AST_PTHREADT_NULL;
2607                         ast_mutex_unlock(&monlock);
2608                         ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
2609                         return -1;
2610                 }
2611         }
2612         ast_mutex_unlock(&monlock);
2613         return 0;
2614 }
2615
2616 static char *handle_cli_h323_set_trace(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
2617 {
2618         switch (cmd) {
2619         case CLI_INIT:
2620                 e->command = "h323 set trace [off]";
2621                 e->usage =
2622                         "Usage: h323 set trace (off|<trace level>)\n"
2623                         "       Enable/Disable H.323 stack tracing for debugging purposes\n";
2624                 return NULL;
2625         case CLI_GENERATE:
2626                 return NULL;
2627         }
2628
2629         if (a->argc != 4)
2630                 return CLI_SHOWUSAGE;
2631         if (!strcasecmp(a->argv[3], "off")) {
2632                 h323_debug(0, 0);
2633                 ast_cli(a->fd, "H.323 Trace Disabled\n");
2634         } else {
2635                 int tracelevel = atoi(a->argv[3]);
2636                 h323_debug(1, tracelevel);
2637                 ast_cli(a->fd, "H.323 Trace Enabled (Trace Level: %d)\n", tracelevel);
2638         }
2639         return CLI_SUCCESS;
2640 }
2641
2642 static char *handle_cli_h323_set_debug(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
2643 {
2644         switch (cmd) {
2645         case CLI_INIT:
2646                 e->command = "h323 set debug [off]";
2647                 e->usage =
2648                         "Usage: h323 set debug [off]\n"
2649                         "       Enable/Disable H.323 debugging output\n";
2650                 return NULL;
2651         case CLI_GENERATE:
2652                 return NULL;
2653         }
2654
2655         if (a->argc < 3 || a->argc > 4)
2656                 return CLI_SHOWUSAGE;
2657         if (a->argc == 4 && strcasecmp(a->argv[3], "off"))
2658                 return CLI_SHOWUSAGE;
2659
2660         h323debug = (a->argc == 3) ? 1 : 0;
2661         ast_cli(a->fd, "H.323 Debugging %s\n", h323debug ? "Enabled" : "Disabled");
2662         return CLI_SUCCESS;
2663 }
2664
2665 static char *handle_cli_h323_cycle_gk(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
2666 {
2667         switch (cmd) {
2668         case CLI_INIT:
2669                 e->command = "h323 cycle gk";
2670                 e->usage =
2671                         "Usage: h323 cycle gk\n"
2672                         "       Manually re-register with the Gatekeper (Currently Disabled)\n";
2673                 return NULL;
2674         case CLI_GENERATE:
2675                 return NULL;
2676         }
2677
2678         if (a->argc != 3)
2679                 return CLI_SHOWUSAGE;
2680
2681         h323_gk_urq();
2682
2683         /* Possibly register with a GK */
2684         if (!gatekeeper_disable) {
2685                 if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
2686                         ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
2687                 }
2688         }
2689         return CLI_SUCCESS;
2690 }
2691
2692 static char *handle_cli_h323_hangup(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
2693 {
2694         switch (cmd) {
2695         case CLI_INIT:
2696                 e->command = "h323 hangup";
2697                 e->usage =
2698                         "Usage: h323 hangup <token>\n"
2699                         "       Manually try to hang up the call identified by <token>\n";
2700                 return NULL;
2701         case CLI_GENERATE:
2702                 return NULL;
2703         }
2704
2705         if (a->argc != 3)
2706                 return CLI_SHOWUSAGE;
2707         if (h323_soft_hangup(a->argv[2])) {
2708                 ast_verb(3, "Hangup succeeded on %s\n", a->argv[2]);
2709         } else {
2710                 ast_verb(3, "Hangup failed for %s\n", a->argv[2]);
2711         }
2712         return CLI_SUCCESS;
2713 }
2714
2715 static char *handle_cli_h323_show_tokens(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
2716 {
2717         switch (cmd) {
2718         case CLI_INIT:
2719                 e->command = "h323 show tokens";
2720                 e->usage =
2721                         "Usage: h323 show tokens\n"
2722                         "       Print out all active call tokens\n";
2723                 return NULL;
2724         case CLI_GENERATE:
2725                 return NULL;
2726         }
2727
2728         if (a->argc != 3)
2729                 return CLI_SHOWUSAGE;
2730
2731         h323_show_tokens();
2732
2733         return CLI_SUCCESS;
2734 }
2735
2736 static struct ast_cli_entry cli_h323[] = {
2737         AST_CLI_DEFINE(handle_cli_h323_set_trace,   "Enable/Disable H.323 Stack Tracing"),
2738         AST_CLI_DEFINE(handle_cli_h323_set_debug,   "Enable/Disable H.323 Debugging"),
2739         AST_CLI_DEFINE(handle_cli_h323_cycle_gk,    "Manually re-register with the Gatekeper"),
2740         AST_CLI_DEFINE(handle_cli_h323_hangup,      "Manually try to hang up a call"),
2741         AST_CLI_DEFINE(handle_cli_h323_show_tokens, "Show all active call tokens"),
2742 };
2743
2744 static void delete_users(void)
2745 {
2746         int pruned = 0;
2747
2748         /* Delete all users */
2749         ASTOBJ_CONTAINER_WRLOCK(&userl);
2750         ASTOBJ_CONTAINER_TRAVERSE(&userl, 1, do {
2751                 ASTOBJ_RDLOCK(iterator);
2752                 ASTOBJ_MARK(iterator);
2753                 ++pruned;
2754                 ASTOBJ_UNLOCK(iterator);
2755         } while (0) );
2756         if (pruned) {
2757                 ASTOBJ_CONTAINER_PRUNE_MARKED(&userl, oh323_destroy_user);
2758         }
2759         ASTOBJ_CONTAINER_UNLOCK(&userl);
2760
2761         ASTOBJ_CONTAINER_WRLOCK(&peerl);
2762         ASTOBJ_CONTAINER_TRAVERSE(&peerl, 1, do {
2763                 ASTOBJ_RDLOCK(iterator);
2764                 ASTOBJ_MARK(iterator);
2765                 ASTOBJ_UNLOCK(iterator);
2766         } while (0) );
2767         ASTOBJ_CONTAINER_UNLOCK(&peerl);
2768 }
2769
2770 static void delete_aliases(void)
2771 {
2772         int pruned = 0;
2773
2774         /* Delete all aliases */
2775         ASTOBJ_CONTAINER_WRLOCK(&aliasl);
2776         ASTOBJ_CONTAINER_TRAVERSE(&aliasl, 1, do {
2777                 ASTOBJ_RDLOCK(iterator);
2778                 ASTOBJ_MARK(iterator);
2779                 ++pruned;
2780                 ASTOBJ_UNLOCK(iterator);
2781         } while (0) );
2782         if (pruned) {
2783                 ASTOBJ_CONTAINER_PRUNE_MARKED(&aliasl, oh323_destroy_alias);
2784         }
2785         ASTOBJ_CONTAINER_UNLOCK(&aliasl);
2786 }
2787
2788 static void prune_peers(void)
2789 {
2790         /* Prune peers who still are supposed to be deleted */
2791         ASTOBJ_CONTAINER_PRUNE_MARKED(&peerl, oh323_destroy_peer);
2792 }
2793
2794 static int reload_config(int is_reload)
2795 {
2796         struct ast_config *cfg, *ucfg;
2797         struct ast_variable *v;
2798         struct oh323_peer *peer = NULL;
2799         struct oh323_user *user = NULL;
2800         struct oh323_alias *alias = NULL;
2801         struct ast_hostent ahp; struct hostent *hp;
2802         char *cat;
2803         const char *utype;
2804         int is_user, is_peer, is_alias;
2805         char _gatekeeper[100];
2806         int gk_discover, gk_disable, gk_changed;
2807         struct ast_flags config_flags = { is_reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
2808
2809         cfg = ast_config_load(config, config_flags);
2810
2811         /* We *must* have a config file otherwise stop immediately */
2812         if (!cfg) {
2813                 ast_log(LOG_NOTICE, "Unable to load config %s, H.323 disabled\n", config);
2814                 return 1;
2815         } else if (cfg == CONFIG_STATUS_FILEUNCHANGED) {
2816                 ucfg = ast_config_load("users.conf", config_flags);
2817                 if (ucfg == CONFIG_STATUS_FILEUNCHANGED)
2818                         return 0;
2819                 ast_clear_flag(&config_flags, CONFIG_FLAG_FILEUNCHANGED);
2820                 cfg = ast_config_load(config, config_flags);
2821         } else {
2822                 ast_clear_flag(&config_flags, CONFIG_FLAG_FILEUNCHANGED);
2823                 ucfg = ast_config_load("users.conf", config_flags);
2824         }
2825
2826         if (is_reload) {
2827                 delete_users();
2828                 delete_aliases();
2829                 prune_peers();
2830         }
2831
2832         /* fire up the H.323 Endpoint */
2833         if (!h323_end_point_exist()) {
2834                 h323_end_point_create();
2835         }
2836         ast_copy_string(_gatekeeper, gatekeeper, sizeof(_gatekeeper));
2837         gk_discover = gatekeeper_discover;
2838         gk_disable = gatekeeper_disable;
2839         memset(&bindaddr, 0, sizeof(bindaddr));
2840         memset(&global_options, 0, sizeof(global_options));
2841         global_options.fastStart = 1;
2842         global_options.h245Tunneling = 1;
2843         global_options.dtmfcodec[0] = H323_DTMF_RFC2833_PT;
2844         global_options.dtmfcodec[1] = H323_DTMF_CISCO_PT;
2845         global_options.dtmfmode = 0;
2846         global_options.holdHandling = 0;
2847         global_options.capability = GLOBAL_CAPABILITY;
2848         global_options.bridge = 1;              /* Do native bridging by default */
2849         strcpy(default_context, "default");
2850         h323_signalling_port = 1720;
2851         gatekeeper_disable = 1;
2852         gatekeeper_discover = 0;
2853         gkroute = 0;
2854         userbyalias = 1;
2855         acceptAnonymous = 1;
2856         tos = 0;
2857         cos = 0;
2858
2859         /* Copy the default jb config over global_jbconf */
2860         memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
2861
2862         if (ucfg) {
2863                 struct ast_variable *gen;
2864                 int genhas_h323;
2865                 const char *has_h323;
2866
2867                 genhas_h323 = ast_true(ast_variable_retrieve(ucfg, "general", "hash323"));
2868                 gen = ast_variable_browse(ucfg, "general");
2869                 for (cat = ast_category_browse(ucfg, NULL); cat; cat = ast_category_browse(ucfg, cat)) {
2870                         if (strcasecmp(cat, "general")) {
2871                                 has_h323 = ast_variable_retrieve(ucfg, cat, "hash323");
2872                                 if (ast_true(has_h323) || (!has_h323 && genhas_h323)) {
2873                                         user = build_user(cat, gen, ast_variable_browse(ucfg, cat), 0);
2874                                         if (user) {
2875                                                 ASTOBJ_CONTAINER_LINK(&userl, user);
2876                                                 ASTOBJ_UNREF(user, oh323_destroy_user);
2877                                         }
2878                                         peer = build_peer(cat, gen, ast_variable_browse(ucfg, cat), 0);
2879                                         if (peer) {
2880                                                 ASTOBJ_CONTAINER_LINK(&peerl, peer);
2881                                                 ASTOBJ_UNREF(peer, oh323_destroy_peer);
2882                                         }
2883                                 }
2884                         }
2885                 }
2886                 ast_config_destroy(ucfg);
2887         }
2888
2889         for (v = ast_variable_browse(cfg, "general"); v; v = v->next) {
2890                 /* handle jb conf */
2891                 if (!ast_jb_read_conf(&global_jbconf, v->name, v->value))
2892                         continue;
2893                 /* Create the interface list */
2894                 if (!strcasecmp(v->name, "port")) {
2895                         h323_signalling_port = (int)strtol(v->value, NULL, 10);
2896                 } else if (!strcasecmp(v->name, "bindaddr")) {
2897                         if (!(hp = ast_gethostbyname(v->value, &ahp))) {
2898                                 ast_log(LOG_WARNING, "Invalid address: %s\n", v->value);
2899                         } else {
2900                                 memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
2901                         }
2902                 } else if (!strcasecmp(v->name, "tos")) {       /* Needs to be removed in next release */
2903                         ast_log(LOG_WARNING, "The \"tos\" setting is deprecated in this version of Asterisk. Please change to \"tos_audio\".\n");
2904                         if (ast_str2tos(v->value, &tos)) {
2905                                 ast_log(LOG_WARNING, "Invalid tos_audio value at line %d, refer to QoS documentation\n", v->lineno);
2906                         }
2907                 } else if (!strcasecmp(v->name, "tos_audio")) {
2908                         if (ast_str2tos(v->value, &tos)) {
2909                                 ast_log(LOG_WARNING, "Invalid tos_audio value at line %d, refer to QoS documentation\n", v->lineno);
2910                         }
2911                 } else if (!strcasecmp(v->name, "cos")) {
2912                         ast_log(LOG_WARNING, "The \"cos\" setting is deprecated in this version of Asterisk. Please change to \"cos_audio\".\n");
2913                         if (ast_str2cos(v->value, &cos)) {
2914                                 ast_log(LOG_WARNING, "Invalid cos_audio value at line %d, refer to QoS documentation\n", v->lineno);
2915                         }
2916                 } else if (!strcasecmp(v->name, "cos_audio")) {
2917                         if (ast_str2cos(v->value, &cos)) {
2918                                 ast_log(LOG_WARNING, "Invalid cos_audio value at line %d, refer to QoS documentation\n", v->lineno);
2919                         }
2920                 } else if (!strcasecmp(v->name, "gatekeeper")) {
2921                         if (!strcasecmp(v->value, "DISABLE")) {
2922                                 gatekeeper_disable = 1;
2923                         } else if (!strcasecmp(v->value, "DISCOVER")) {
2924                                 gatekeeper_disable = 0;
2925                                 gatekeeper_discover = 1;
2926                         } else {
2927                                 gatekeeper_disable = 0;
2928                                 ast_copy_string(gatekeeper, v->value, sizeof(gatekeeper));
2929                         }
2930                 } else if (!strcasecmp(v->name, "secret")) {
2931                         ast_copy_string(secret, v->value, sizeof(secret));
2932                 } else if (!strcasecmp(v->name, "AllowGKRouted")) {
2933                         gkroute = ast_true(v->value);
2934                 } else if (!strcasecmp(v->name, "context")) {
2935                         ast_copy_string(default_context, v->value, sizeof(default_context));
2936                         ast_verb(2, "Setting default context to %s\n", default_context);
2937                 } else if (!strcasecmp(v->name, "UserByAlias")) {
2938                         userbyalias = ast_true(v->value);
2939                 } else if (!strcasecmp(v->name, "AcceptAnonymous")) {
2940                         acceptAnonymous = ast_true(v->value);
2941                 } else if (!update_common_options(v, &global_options)) {
2942                         /* dummy */
2943                 }
2944         }
2945         if (!global_options.dtmfmode)
2946                 global_options.dtmfmode = H323_DTMF_RFC2833;
2947         if (global_options.holdHandling == ~0)
2948                 global_options.holdHandling = 0;
2949         else if (!global_options.holdHandling)
2950                 global_options.holdHandling = H323_HOLD_H450;
2951
2952         for (cat = ast_category_browse(cfg, NULL); cat; cat = ast_category_browse(cfg, cat)) {
2953                 if (strcasecmp(cat, "general")) {
2954                         utype = ast_variable_retrieve(cfg, cat, "type");
2955                         if (utype) {
2956                                 is_user = is_peer = is_alias = 0;
2957                                 if (!strcasecmp(utype, "user"))
2958                                         is_user = 1;
2959                                 else if (!strcasecmp(utype, "peer"))
2960                                         is_peer = 1;
2961                                 else if (!strcasecmp(utype, "friend"))
2962                                         is_user = is_peer = 1;
2963                                 else if (!strcasecmp(utype, "h323") || !strcasecmp(utype, "alias"))
2964                                         is_alias = 1;
2965                                 else {
2966                                         ast_log(LOG_WARNING, "Unknown type '%s' for '%s' in %s\n", utype, cat, config);
2967                                         continue;
2968                                 }
2969                                 if (is_user) {
2970                                         user = build_user(cat, ast_variable_browse(cfg, cat), NULL, 0);
2971                                         if (user) {
2972                                                 ASTOBJ_CONTAINER_LINK(&userl, user);
2973                                                 ASTOBJ_UNREF(user, oh323_destroy_user);
2974                                         }
2975                                 }
2976                                 if (is_peer) {
2977                                         peer = build_peer(cat, ast_variable_browse(cfg, cat), NULL, 0);
2978                                         if (peer) {
2979                                                 ASTOBJ_CONTAINER_LINK(&peerl, peer);
2980                                                 ASTOBJ_UNREF(peer, oh323_destroy_peer);
2981                                         }
2982                                 }
2983                                 if (is_alias) {
2984                                         alias = build_alias(cat, ast_variable_browse(cfg, cat), NULL, 0);
2985                                         if (alias) {
2986                                                 ASTOBJ_CONTAINER_LINK(&aliasl, alias);
2987                                                 ASTOBJ_UNREF(alias, oh323_destroy_alias);
2988                                         }
2989                                 }
2990                         } else {
2991                                 ast_log(LOG_WARNING, "Section '%s' lacks type\n", cat);
2992                         }
2993                 }
2994         }
2995         ast_config_destroy(cfg);
2996
2997         /* Register our H.323 aliases if any*/
2998         ASTOBJ_CONTAINER_WRLOCK(&aliasl);
2999         ASTOBJ_CONTAINER_TRAVERSE(&aliasl, 1, do {
3000                 ASTOBJ_RDLOCK(iterator);
3001                 if (h323_set_alias(iterator)) {
3002                         ast_log(LOG_ERROR, "Alias %s rejected by endpoint\n", alias->name);
3003                         ASTOBJ_UNLOCK(iterator);
3004                         continue;
3005                 }
3006                 ASTOBJ_UNLOCK(iterator);
3007         } while (0) );
3008         ASTOBJ_CONTAINER_UNLOCK(&aliasl);
3009
3010         /* Don't touch GK if nothing changed because URQ will drop all existing calls */
3011         gk_changed = 0;
3012         if (gatekeeper_disable != gk_disable)
3013                 gk_changed = is_reload;
3014         else if(!gatekeeper_disable && (gatekeeper_discover != gk_discover))
3015                 gk_changed = is_reload;
3016         else if(!gatekeeper_disable && (strncmp(_gatekeeper, gatekeeper, sizeof(_gatekeeper)) != 0))
3017                 gk_changed = is_reload;
3018         if (gk_changed) {
3019                 if(!gk_disable)
3020                         h323_gk_urq();
3021                 if (!gatekeeper_disable) {
3022                         if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
3023                                 ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
3024                                 gatekeeper_disable = 1;
3025                         }
3026                 }
3027         }
3028         return 0;
3029 }
3030
3031 static int h323_reload(void)
3032 {
3033         ast_mutex_lock(&h323_reload_lock);
3034         if (h323_reloading) {
3035                 ast_verbose("Previous H.323 reload not yet done\n");
3036         } else {
3037                 h323_reloading = 1;
3038         }
3039         ast_mutex_unlock(&h323_reload_lock);
3040         restart_monitor();
3041         return 0;
3042 }
3043
3044 static char *handle_cli_h323_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
3045 {
3046         switch (cmd) {
3047         case CLI_INIT:
3048                 e->command = "h323 reload";
3049                 e->usage =
3050                         "Usage: h323 reload\n"
3051                         "       Reloads H.323 configuration from h323.conf\n";