channels/chan_h323.c

   1 /*
   2  * chan_h323.c
   3  *
   4  * OpenH323 Channel Driver for ASTERISK PBX.
   5  *                      By Jeremy McNamara
   6  *                      For The NuFone Network
   7  *
   8  * chan_h323 has been derived from code created by
   9  *               Michael Manousos and Mark Spencer
  10  *
  11  * This file is part of the chan_h323 driver for Asterisk
  12  *
  13  * chan_h323 is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * chan_h323 is distributed WITHOUT ANY WARRANTY; without even
  19  * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  20  * PURPOSE. See the GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  *
  26  * Version Info: $Id$
  27  */
  28
  29 #include <sys/socket.h>
  30 #include <sys/signal.h>
  31 #include <sys/param.h>
  32 #if defined(BSD)
  33 #ifndef IPTOS_MINCOST
  34 #define IPTOS_MINCOST 0x02
  35 #endif
  36 #endif
  37 #include <arpa/inet.h>
  38 #include <net/if.h>
  39 #include <netinet/in.h>
  40 #include <netinet/in_systm.h>
  41 #include <netinet/ip.h>
  42 #include <unistd.h>
  43 #include <stdlib.h>
  44 #include <netdb.h>
  45 #include <stdio.h>
  46 #include <string.h>
  47 #include <errno.h>
  48 #include <fcntl.h>
  49 #ifdef __cplusplus
  50 extern "C" {
  51 #endif
  52 #include <asterisk/lock.h>
  53 #include <asterisk/logger.h>
  54 #include <asterisk/channel.h>
  55 #include <asterisk/channel_pvt.h>
  56 #include <asterisk/config.h>
  57 #include <asterisk/module.h>
  58 #include <asterisk/pbx.h>
  59 #include <asterisk/options.h>
  60 #include <asterisk/utils.h>
  61 #include <asterisk/lock.h>
  62 #include <asterisk/sched.h>
  63 #include <asterisk/io.h>
  64 #include <asterisk/rtp.h>
  65 #include <asterisk/acl.h>
  66 #include <asterisk/callerid.h>
  67 #include <asterisk/cli.h>
  68 #include <asterisk/dsp.h>
  69 #include <asterisk/causes.h>
  70 #ifdef __cplusplus
  71 }
  72 #endif
  73 #include "h323/chan_h323.h"
  74
  75 send_digit_cb on_send_digit;
  76 on_rtp_cb on_external_rtp_create;
  77 start_rtp_cb on_start_rtp_channel;
  78 setup_incoming_cb on_incoming_call;
  79 setup_outbound_cb on_outgoing_call;
  80 chan_ringing_cb on_chan_ringing;
  81 con_established_cb on_connection_established;
  82 clear_con_cb on_connection_cleared;
  83 answer_call_cb on_answer_call;
  84
  85 /* global debug flag */
  86 int h323debug;
  87
  88 /** Variables required by Asterisk */
  89 static char *type = "H323";
  90 static char *desc = "The NuFone Network's Open H.323 Channel Driver";
  91 static char *tdesc = "The NuFone Network's Open H.323 Channel Driver";
  92 static char *config = "h323.conf";
  93 static char default_context[AST_MAX_EXTENSION] = "default";
  94
  95 /** H.323 configuration values */
  96 static int h323_signalling_port = 1720;
  97 static char gatekeeper[100];
  98 static int gatekeeper_disable = 1;
  99 static int gatekeeper_discover = 0;
 100 static int usingGk = 0;
 101 static int gkroute = 0;
 102 static int noFastStart = 0;
 103 static int noH245Tunneling = 0;
 104 static int noSilenceSuppression = 0;
 105 /* Assume we can native bridge by default */
 106 static int bridging = 1;
 107 /* Find user by alias (h.323 id) is default, alternative is the incomming call's source IP address*/
 108 static int userbyalias = 1;
 109 static int capability = AST_FORMAT_ULAW;
 110 static int tos = 0;
 111 static int dtmfmode = H323_DTMF_RFC2833;
 112 static char secret[50];
 113
 114 /** Private structure of a OpenH323 channel */
 115 struct oh323_pvt {
 116         ast_mutex_t lock;                                       /* Channel private lock */
 117         call_options_t options;                                 /* Options to be used during call setup */
 118         int alreadygone;                                        /* Whether or not we've already been destroyed by our peer */
 119         int needdestroy;                                        /* if we need to be destroyed */
 120         call_details_t cd;                                      /* Call details */
 121         struct ast_channel *owner;                              /* Who owns us */
 122         struct sockaddr_in sa;                                  /* Our peer */
 123         struct sockaddr_in redirip;                             /* Where our RTP should be going if not to us */
 124         int capability;                                         /* audio capability */
 125         int nonCodecCapability;                                 /* non-audio capability */
 126         int outgoing;                                           /* Outgoing or incoming call? */
 127         int nat;                                                /* Are we talking to a NAT EP?*/
 128         int bridge;                                             /* Determine of we should native bridge or not*/
 129         char exten[AST_MAX_EXTENSION];                          /* Requested extension */
 130         char context[AST_MAX_EXTENSION];                        /* Context where to start */
 131         char accountcode[256];                                  /* Account code */
 132         char cid_num[256];                                      /* Caller*id number, if available */
 133         char cid_name[256];                                     /* Caller*id name, if available */
 134         char rdnis[256];                                        /* Referring DNIS, if available */
 135         int amaflags;                                           /* AMA Flags */
 136         struct ast_rtp *rtp;                                    /* RTP Session */
 137         int dtmfmode;                                           /* What DTMF Mode is being used */
 138         struct ast_dsp *vad;                                    /* Used for in-band DTMF detection */
 139         struct oh323_pvt *next;                                 /* Next channel in list */
 140 } *iflist = NULL;
 141
 142 static struct ast_user_list {
 143         struct oh323_user *users;
 144         ast_mutex_t lock;
 145 } userl;
 146
 147 static struct ast_peer_list {
 148         struct oh323_peer *peers;
 149         ast_mutex_t lock;
 150 } peerl;
 151
 152 static struct ast_alias_list {
 153         struct oh323_alias *aliases;
 154         ast_mutex_t lock;
 155 } aliasl;
 156
 157 /** Asterisk RTP stuff */
 158 static struct sched_context *sched;
 159 static struct io_context *io;
 160
 161 /** Protect the interface list (oh323_pvt) */
 162 AST_MUTEX_DEFINE_STATIC(iflock);
 163
 164 /** Usage counter and associated lock */
 165 static int usecnt = 0;
 166 AST_MUTEX_DEFINE_STATIC(usecnt_lock);
 167
 168 /* Protect the monitoring thread, so only one process can kill or start it, and not
 169    when it's doing something critical. */
 170 AST_MUTEX_DEFINE_STATIC(monlock);
 171
 172 /* Protect the H.323 capabilities list, to avoid more than one channel to set the capabilities simultaneaously in the h323 stack. */
 173 AST_MUTEX_DEFINE_STATIC(caplock);
 174
 175 /* Protect the reload process */
 176 AST_MUTEX_DEFINE_STATIC(h323_reload_lock);
 177 static int h323_reloading = 0;
 178
 179 /* This is the thread for the monitor which checks for input on the channels
 180    which are not currently in use.  */
 181 static pthread_t monitor_thread = AST_PTHREADT_NULL;
 182 static int restart_monitor(void);
 183 static int h323_do_reload(void);
 184
 185 static void __oh323_destroy(struct oh323_pvt *p)
 186 {
 187         struct oh323_pvt *cur, *prev = NULL;
 188
 189         if (p->rtp) {
 190                 ast_rtp_destroy(p->rtp);
 191         }
 192
 193         /* Unlink us from the owner if we have one */
 194         if (p->owner) {
 195                 ast_mutex_lock(&p->owner->lock);
 196                 ast_log(LOG_DEBUG, "Detaching from %s\n", p->owner->name);
 197                 p->owner->pvt->pvt = NULL;
 198                 ast_mutex_unlock(&p->owner->lock);
 199         }
 200         cur = iflist;
 201         while(cur) {
 202                 if (cur == p) {
 203                         if (prev)
 204                                 prev->next = cur->next;
 205                         else
 206                                 iflist = cur->next;
 207                         break;
 208                 }
 209                 prev = cur;
 210                 cur = cur->next;
 211         }
 212         if (!cur) {
 213                 ast_log(LOG_WARNING, "%p is not in list?!?! \n", cur);
 214         } else {
 215                 ast_mutex_destroy(&p->lock);
 216                 free(p);
 217         }
 218 }
 219
 220 static void oh323_destroy(struct oh323_pvt *p)
 221 {
 222         ast_mutex_lock(&iflock);
 223         __oh323_destroy(p);
 224         ast_mutex_unlock(&iflock);
 225 }
 226
 227 static struct oh323_alias *build_alias(char *name, struct ast_variable *v)
 228 {
 229         struct oh323_alias *alias;
 230
 231         alias = (struct oh323_alias *)malloc(sizeof(struct oh323_alias));
 232         if (alias) {
 233                 memset(alias, 0, sizeof(struct oh323_alias));
 234                 strncpy(alias->name, name, sizeof(alias->name) - 1);
 235                 while (v) {
 236                         if (!strcasecmp(v->name, "e164")) {
 237                                 strncpy(alias->e164,  v->value, sizeof(alias->e164) - 1);
 238                         } else if (!strcasecmp(v->name, "prefix")) {
 239                                 strncpy(alias->prefix,  v->value, sizeof(alias->prefix) - 1);
 240                         } else if (!strcasecmp(v->name, "context")) {
 241                                 strncpy(alias->context,  v->value, sizeof(alias->context) - 1);
 242                         } else if (!strcasecmp(v->name, "secret")) {
 243                                 strncpy(alias->secret,  v->value, sizeof(alias->secret) - 1);
 244                         } else {
 245                                 if (strcasecmp(v->value, "h323")) {
 246                                         ast_log(LOG_WARNING, "Keyword %s does not make sense in type=h323\n", v->value);
 247                                 }
 248                         }
 249                         v = v->next;
 250                 }
 251         }
 252         return alias;
 253 }
 254
 255 static struct oh323_user *build_user(char *name, struct ast_variable *v)
 256 {
 257         struct oh323_user *user;
 258         int format;
 259
 260         user = (struct oh323_user *)malloc(sizeof(struct oh323_user));
 261         if (user) {
 262                 memset(user, 0, sizeof(struct oh323_user));
 263                 strncpy(user->name, name, sizeof(user->name) - 1);
 264
 265                 /* set a native brigding default value */
 266                 user->bridge = bridging;
 267                 /* and default context */
 268                 strncpy(user->context, default_context, sizeof(user->context) - 1);
 269                 while(v) {
 270                         if (!strcasecmp(v->name, "context")) {
 271                                 strncpy(user->context, v->value, sizeof(user->context) - 1);
 272                         } else if (!strcasecmp(v->name, "bridge")) {
 273                                 user->bridge = ast_true(v->value);
 274                       } else if (!strcasecmp(v->name, "nat")) {
 275                               user->nat = ast_true(v->value);
 276                         } else if (!strcasecmp(v->name, "noFastStart")) {
 277                                 user->noFastStart = ast_true(v->value);
 278                         } else if (!strcasecmp(v->name, "noH245Tunneling")) {
 279                                 user->noH245Tunneling = ast_true(v->value);
 280                         } else if (!strcasecmp(v->name, "noSilenceSuppression")) {
 281                                 user->noSilenceSuppression = ast_true(v->value);
 282                         } else if (!strcasecmp(v->name, "secret")) {
 283                                 strncpy(user->secret, v->value, sizeof(user->secret) - 1);
 284                         } else if (!strcasecmp(v->name, "callerid")) {
 285                                 strncpy(user->callerid, v->value, sizeof(user->callerid) - 1);
 286                         } else if (!strcasecmp(v->name, "accountcode")) {
 287                                 strncpy(user->accountcode, v->value, sizeof(user->accountcode) - 1);
 288                         } else if (!strcasecmp(v->name, "host")) {
 289                                 if (!strcasecmp(v->value, "dynamic")) {
 290                                         ast_log(LOG_ERROR, "A dynamic host on a type=user does not make any sense\n");
 291                                         free(user);
 292                                         return NULL;
 293                                 } else if (ast_get_ip(&user->addr, v->value)) {
 294                                         free(user);
 295                                         return NULL;
 296                                 }
 297                                 /* Let us know we need to use ip authentication */
 298                                 user->host = 1;
 299                         } else if (!strcasecmp(v->name, "amaflags")) {
 300                                 format = ast_cdr_amaflags2int(v->value);
 301                                 if (format < 0) {
 302                                         ast_log(LOG_WARNING, "Invalid AMA Flags: %s at line %d\n", v->value, v->lineno);
 303                                 } else {
 304                                         user->amaflags = format;
 305                                 }
 306                         }
 307                         v = v->next;
 308                 }
 309         }
 310         return user;
 311 }
 312
 313 static struct oh323_peer *build_peer(char *name, struct ast_variable *v)
 314 {
 315         struct oh323_peer *peer;
 316         struct oh323_peer *prev;
 317         struct ast_ha *oldha = NULL;
 318         int found=0;
 319         int format;
 320
 321         prev = NULL;
 322         ast_mutex_lock(&peerl.lock);
 323         peer = peerl.peers;
 324
 325         while(peer) {
 326                 if (!strcasecmp(peer->name, name)) {
 327                         break;
 328                 }
 329                 prev = peer;
 330                 peer = peer->next;
 331         }
 332
 333         if (peer) {
 334                 found++;
 335                 /* Already in the list, remove it and it will be added back (or FREE'd) */
 336                 if (prev) {
 337                         prev->next = peer->next;
 338                 } else {
 339                         peerl.peers = peer->next;
 340                 }
 341                 ast_mutex_unlock(&peerl.lock);
 342         } else {
 343                 ast_mutex_unlock(&peerl.lock);
 344                 peer = (struct oh323_peer*)malloc(sizeof(struct oh323_peer));
 345                 memset(peer, 0, sizeof(struct oh323_peer));
 346         }
 347         if (peer) {
 348                 if (!found) {
 349                         strncpy(peer->name, name, sizeof(peer->name) - 1);
 350                         peer->addr.sin_port = htons(h323_signalling_port);
 351                         peer->addr.sin_family = AF_INET;
 352                 }
 353                 oldha = peer->ha;
 354                 peer->ha = NULL;
 355                 peer->addr.sin_family = AF_INET;
 356                 peer->capability = capability;
 357
 358                 while(v) {
 359                         if (!strcasecmp(v->name, "bridge")) {
 360                                 peer->bridge = ast_true(v->value);
 361                         } else if (!strcasecmp(v->name, "nat")) {
 362                                 peer->nat = ast_true(v->value);
 363                         } else if (!strcasecmp(v->name, "noFastStart")) {
 364                                 peer->noFastStart = ast_true(v->value);
 365                         } else if (!strcasecmp(v->name, "noH245Tunneling")) {
 366                                 peer->noH245Tunneling = ast_true(v->value);
 367                         } else if (!strcasecmp(v->name, "noSilenceSuppression")) {
 368                                 peer->noSilenceSuppression = ast_true(v->value);
 369                         } else if (!strcasecmp(v->name, "dtmfmode")) {
 370                                 if (!strcasecmp(v->value, "inband")) {
 371                                         peer->dtmfmode = H323_DTMF_INBAND;
 372                                 } else if (!strcasecmp(v->value, "rfc2833")) {
 373                                         peer->dtmfmode = H323_DTMF_RFC2833;
 374                                 } else {
 375                                         ast_log(LOG_WARNING, "Unknown DTMF Mode %s, using RFC2833\n", v->value);
 376                                         peer->dtmfmode = H323_DTMF_RFC2833;
 377                                 }
 378                         } else if (!strcasecmp(v->name, "allow")) {
 379                                 format = ast_getformatbyname(v->value);
 380                                 if (format < 1) {
 381                                         ast_log(LOG_WARNING, "Cannot allow unknown format '%s'\n", v->value);
 382                                 } else {
 383                                         peer->capability |= format;
 384                                 }
 385                         } else if (!strcasecmp(v->name, "disallow")) {
 386                                 format = ast_getformatbyname(v->value);
 387                                 if (format < 1) {
 388                                         ast_log(LOG_WARNING, "Cannot disallow unknown format '%s'\n", v->value);
 389                                 } else {
 390                                         peer->capability |= ~format;
 391                                 }
 392                         } else if (!strcasecmp(v->name, "host")) {
 393                                 if (!strcasecmp(v->value, "dynamic")) {
 394                                         ast_log(LOG_ERROR, "Dynamic host configuration not implemented.\n");
 395                                         free(peer);
 396                                         return NULL;
 397                                 }
 398                                 if (ast_get_ip(&peer->addr, v->value)) {
 399                                                 ast_log(LOG_ERROR, "Could not determine IP for %s\n", v->value);
 400                                                 free(peer);
 401                                                 return NULL;
 402                                 }
 403                         } else if (!strcasecmp(v->name, "port")) {
 404                                 peer->addr.sin_port = htons(atoi(v->value));
 405                         }
 406                         v=v->next;
 407                 }
 408         }
 409         return peer;
 410 }
 411
 412 /**
 413  * Send (play) the specified digit to the channel.
 414  *
 415  */
 416 static int oh323_digit(struct ast_channel *c, char digit)
 417 {
 418         struct oh323_pvt *p = (struct oh323_pvt *) c->pvt->pvt;
 419         if (p && p->rtp && (p->dtmfmode & H323_DTMF_RFC2833)) {
 420                 ast_rtp_senddigit(p->rtp, digit);
 421         }
 422         /* If in-band DTMF is desired, send that */
 423         if (p->dtmfmode & H323_DTMF_INBAND) {
 424                 h323_send_tone(p->cd.call_token, digit);
 425         }
 426         return 0;
 427 }
 428
 429 /**
 430  * Make a call over the specified channel to the specified
 431  * destination.
 432  * Returns -1 on error, 0 on success.
 433  */
 434 static int oh323_call(struct ast_channel *c, char *dest, int timeout)
 435 {
 436         int res = 0;
 437         struct oh323_pvt *pvt = (struct oh323_pvt *)c->pvt->pvt;
 438         char addr[INET_ADDRSTRLEN];
 439         char called_addr[INET_ADDRSTRLEN];
 440
 441         ast_log(LOG_DEBUG, "Dest is %s\n", dest);
 442
 443         if ((c->_state != AST_STATE_DOWN) && (c->_state != AST_STATE_RESERVED)) {
 444                 ast_log(LOG_WARNING, "Line is already in use (%s)\n", c->name);
 445                 return -1;
 446         }
 447         /* Clear and then set the address to call */
 448         memset(addr, 0, sizeof(addr));
 449         if (usingGk) {
 450                 memcpy(addr, dest, strlen(addr));
 451                 pvt->options.noFastStart = noFastStart;
 452                 pvt->options.noH245Tunneling = noH245Tunneling;
 453                 pvt->options.noSilenceSuppression = noSilenceSuppression;
 454                 pvt->options.port = h323_signalling_port;
 455         } else {
 456                 ast_inet_ntoa(addr, sizeof(addr), pvt->sa.sin_addr);
 457                 pvt->options.port = htons(pvt->sa.sin_port);
 458         }
 459         /* indicate that this is an outgoing call */
 460         pvt->outgoing = 1;
 461
 462         if (pvt->exten) {
 463                 sprintf(called_addr, "%s@%s:%d", pvt->exten, addr, pvt->options.port);
 464         } else {
 465                 sprintf(called_addr, "%s:%d",addr, pvt->options.port);
 466         }
 467         ast_log(LOG_DEBUG, "Placing outgoing call to %s\n", called_addr);
 468         res = h323_make_call(called_addr, &(pvt->cd), pvt->options);
 469         if (res) {
 470                 ast_log(LOG_NOTICE, "h323_make_call failed(%s)\n", c->name);
 471                 return -1;
 472         }
 473         return 0;
 474 }
 475
 476 static int oh323_answer(struct ast_channel *c)
 477 {
 478         int res;
 479         struct oh323_pvt *pvt = (struct oh323_pvt *) c->pvt->pvt;
 480
 481         res = h323_answering_call(pvt->cd.call_token, 0);
 482
 483         if (c->_state != AST_STATE_UP) {
 484                 ast_setstate(c, AST_STATE_UP);
 485         }
 486         return res;
 487 }
 488
 489 static int oh323_hangup(struct ast_channel *c)
 490 {
 491         struct oh323_pvt *pvt = (struct oh323_pvt *) c->pvt->pvt;
 492         int needcancel = 0;
 493         if (h323debug) {
 494                 ast_log(LOG_DEBUG, "oh323_hangup(%s)\n", c->name);
 495         }
 496         if (!c->pvt->pvt) {
 497                 ast_log(LOG_DEBUG, "Asked to hangup channel not connected\n");
 498                 return 0;
 499         }
 500         ast_mutex_lock(&pvt->lock);
 501         /* Determine how to disconnect */
 502         if (pvt->owner != c) {
 503                 ast_log(LOG_WARNING, "Huh?  We aren't the owner?\n");
 504                 ast_mutex_unlock(&pvt->lock);
 505                 return 0;
 506         }
 507         if (!c || (c->_state != AST_STATE_UP)) {
 508                 needcancel = 1;
 509         }
 510         pvt = (struct oh323_pvt *)c->pvt->pvt;
 511
 512         /* Free dsp used for in-band DTMF detection */
 513         if (pvt->vad) {
 514                 ast_dsp_free(pvt->vad);
 515         }
 516         pvt->owner = NULL;
 517         c->pvt->pvt = NULL;
 518
 519         /* Start the process if it's not already started */
 520         if (!pvt->alreadygone) {
 521                 if (h323_clear_call((pvt->cd).call_token)) {
 522                         ast_log(LOG_DEBUG, "ClearCall failed.\n");
 523                 }
 524                 pvt->needdestroy = 1;
 525         }
 526
 527         /* Update usage counter */
 528         ast_mutex_lock(&usecnt_lock);
 529         usecnt--;
 530         if (usecnt < 0) {
 531                 ast_log(LOG_WARNING, "Usecnt < 0\n");
 532         }
 533         ast_mutex_unlock(&usecnt_lock);
 534         ast_update_use_count();
 535         ast_mutex_unlock(&pvt->lock);
 536         return 0;
 537 }
 538
 539 static struct ast_frame *oh323_rtp_read(struct oh323_pvt *pvt)
 540 {
 541         /* Retrieve audio/etc from channel.  Assumes pvt->lock is already held. */
 542         struct ast_frame *f;
 543         static struct ast_frame null_frame = { AST_FRAME_NULL, };
 544
 545         /* Only apply it for the first packet, we just need the correct ip/port */
 546         if (pvt->nat) {
 547                 ast_rtp_setnat(pvt->rtp,pvt->nat);
 548                 pvt->nat = 0;
 549         }
 550
 551         f = ast_rtp_read(pvt->rtp);
 552         /* Don't send RFC2833 if we're not supposed to */
 553         if (f && (f->frametype == AST_FRAME_DTMF) && !(pvt->dtmfmode & H323_DTMF_RFC2833)) {
 554                 return &null_frame;
 555         }
 556         if (pvt->owner) {
 557                 /* We already hold the channel lock */
 558                 if (f->frametype == AST_FRAME_VOICE) {
 559                         if (f->subclass != pvt->owner->nativeformats) {
 560                                 ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
 561                                 pvt->owner->nativeformats = f->subclass;
 562                                 ast_set_read_format(pvt->owner, pvt->owner->readformat);
 563                                 ast_set_write_format(pvt->owner, pvt->owner->writeformat);
 564                         }
 565                         /* Do in-band DTMF detection */
 566                         if (pvt->dtmfmode & H323_DTMF_INBAND) {
 567                                 f = ast_dsp_process(pvt->owner,pvt->vad,f);
 568                                 if (f->frametype == AST_FRAME_DTMF) {
 569                                         ast_log(LOG_DEBUG, "Received in-band digit %c.\n", f->subclass);
 570                                 }
 571                         }
 572
 573                 }
 574         }
 575         return f;
 576 }
 577
 578 static struct ast_frame  *oh323_read(struct ast_channel *c)
 579 {
 580         struct ast_frame *fr;
 581         struct oh323_pvt *pvt = (struct oh323_pvt *)c->pvt->pvt;
 582         ast_mutex_lock(&pvt->lock);
 583         fr = oh323_rtp_read(pvt);
 584         ast_mutex_unlock(&pvt->lock);
 585         return fr;
 586 }
 587
 588 static int oh323_write(struct ast_channel *c, struct ast_frame *frame)
 589 {
 590         struct oh323_pvt *pvt = (struct oh323_pvt *) c->pvt->pvt;
 591         int res = 0;
 592         if (frame->frametype != AST_FRAME_VOICE) {
 593                 if (frame->frametype == AST_FRAME_IMAGE) {
 594                         return 0;
 595                 } else {
 596                         ast_log(LOG_WARNING, "Can't send %d type frames with H323 write\n", frame->frametype);
 597                         return 0;
 598                 }
 599         } else {
 600                 if (!(frame->subclass & c->nativeformats)) {
 601                         ast_log(LOG_WARNING, "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
 602                                 frame->subclass, c->nativeformats, c->readformat, c->writeformat);
 603                         return -1;
 604                 }
 605         }
 606         if (pvt) {
 607                 ast_mutex_lock(&pvt->lock);
 608                 if (pvt->rtp) {
 609                         res =  ast_rtp_write(pvt->rtp, frame);
 610                 }
 611                 ast_mutex_unlock(&pvt->lock);
 612         }
 613         return res;
 614 }
 615
 616 static int oh323_indicate(struct ast_channel *c, int condition)
 617 {
 618
 619         struct oh323_pvt *pvt = (struct oh323_pvt *) c->pvt->pvt;
 620
 621         switch(condition) {
 622         case AST_CONTROL_RINGING:
 623                 if (c->_state == AST_STATE_RING || c->_state == AST_STATE_RINGING) {
 624                         h323_send_alerting(pvt->cd.call_token);
 625                         break;
 626                 }
 627                 return -1;
 628         case AST_CONTROL_PROGRESS:
 629                 if (c->_state != AST_STATE_UP) {
 630                         h323_send_progress(pvt->cd.call_token);
 631                         break;
 632                 }
 633                 return -1;
 634
 635         case AST_CONTROL_BUSY:
 636                 if (c->_state != AST_STATE_UP) {
 637                         h323_answering_call(pvt->cd.call_token, 1);
 638                         pvt->alreadygone = 1;
 639                         ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV);
 640                         break;
 641                 }
 642                 return -1;
 643         case AST_CONTROL_CONGESTION:
 644                 if (c->_state != AST_STATE_UP) {
 645                         h323_answering_call(pvt->cd.call_token, 1);
 646                         pvt->alreadygone = 1;
 647                         ast_softhangup_nolock(c, AST_SOFTHANGUP_DEV);
 648                         break;
 649                 }
 650                 return -1;
 651         case AST_CONTROL_PROCEEDING:
 652         case -1:
 653                 return -1;
 654         default:
 655                 ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", condition);
 656                 return -1;
 657         ast_mutex_unlock(&pvt->lock);
 658         }
 659         return 0;
 660 }
 661
 662 static int oh323_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
 663 {
 664         struct oh323_pvt *pvt = (struct oh323_pvt *) newchan->pvt->pvt;
 665
 666         ast_mutex_lock(&pvt->lock);
 667         if (pvt->owner != oldchan) {
 668                 ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, pvt->owner);
 669                 return -1;
 670         }
 671         pvt->owner = newchan;
 672         ast_mutex_unlock(&pvt->lock);
 673         return 0;
 674 }
 675
 676 static struct ast_channel *oh323_new(struct oh323_pvt *pvt, int state, const char *host)
 677 {
 678         struct ast_channel *ch;
 679         int fmt;
 680
 681         /* Don't hold a oh323_pvt lock while we allocate a chanel */
 682         ast_mutex_unlock(&pvt->lock);
 683         ch = ast_channel_alloc(1);
 684         ast_mutex_lock(&pvt->lock);
 685         if (ch) {
 686                 snprintf(ch->name, sizeof(ch->name), "H323/%s", host);
 687                 ch->nativeformats = pvt->capability;
 688                 if (!ch->nativeformats) {
 689                         ch->nativeformats = capability;
 690                 }
 691                 fmt = ast_best_codec(ch->nativeformats);
 692                 ch->type = type;
 693                 ch->fds[0] = ast_rtp_fd(pvt->rtp);
 694                 if (state == AST_STATE_RING) {
 695                         ch->rings = 1;
 696                 }
 697                 ch->writeformat = fmt;
 698                 ch->pvt->rawwriteformat = fmt;
 699                 ch->readformat = fmt;
 700                 ch->pvt->rawreadformat = fmt;
 701                 /* Allocate dsp for in-band DTMF support */
 702                 if (pvt->dtmfmode & H323_DTMF_INBAND) {
 703                         pvt->vad = ast_dsp_new();
 704                         ast_dsp_set_features(pvt->vad, DSP_FEATURE_DTMF_DETECT);
 705                 }
 706                 /* Register channel functions. */
 707                 ch->pvt->pvt = pvt;
 708                 ch->pvt->send_digit = oh323_digit;
 709                 ch->pvt->call = oh323_call;
 710                 ch->pvt->hangup = oh323_hangup;
 711                 ch->pvt->answer = oh323_answer;
 712                 ch->pvt->read = oh323_read;
 713                 ch->pvt->write = oh323_write;
 714                 ch->pvt->indicate = oh323_indicate;
 715                 ch->pvt->fixup = oh323_fixup;
 716                 /* disable, for now */
 717 #if 0
 718                 ch->pvt->bridge = ast_rtp_bridge;
 719 #endif
 720                 /*  Set the owner of this channel */
 721                 pvt->owner = ch;
 722
 723                 /* Update usage counter */
 724                 ast_mutex_lock(&usecnt_lock);
 725                 usecnt++;
 726                 ast_mutex_unlock(&usecnt_lock);
 727                 ast_update_use_count();
 728
 729                 strncpy(ch->context, pvt->context, sizeof(ch->context) - 1);
 730                 strncpy(ch->exten, pvt->exten, sizeof(ch->exten) - 1);
 731                 ch->priority = 1;
 732                 if (!ast_strlen_zero(pvt->accountcode)) {
 733                         strncpy(ch->accountcode, pvt->accountcode, sizeof(ch->accountcode) - 1);
 734                 }
 735                 if (pvt->amaflags) {
 736                         ch->amaflags = pvt->amaflags;
 737                 }
 738                 if (!ast_strlen_zero(pvt->cid_num)) {
 739                         ch->cid.cid_num = strdup(pvt->cid_num);
 740                 }
 741                 if (!ast_strlen_zero(pvt->cid_name)) {
 742                         ch->cid.cid_name = strdup(pvt->cid_name);
 743                 }
 744                 if (!ast_strlen_zero(pvt->rdnis)) {
 745                         ch->cid.cid_rdnis = strdup(pvt->rdnis);
 746                 }
 747                 if (!ast_strlen_zero(pvt->exten) && strcmp(pvt->exten, "s")) {
 748                         ch->cid.cid_dnid = strdup(pvt->exten);
 749                 }
 750                 ast_setstate(ch, state);
 751                 if (state != AST_STATE_DOWN) {
 752                         if (ast_pbx_start(ch)) {
 753                                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", ch->name);
 754                                 ast_hangup(ch);
 755                                 ch = NULL;
 756                         }
 757                 }
 758         } else  {
 759                 ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
 760         }
 761         return ch;
 762 }
 763
 764 static struct oh323_pvt *oh323_alloc(int callid)
 765 {
 766         struct oh323_pvt *pvt;
 767
 768         pvt = (struct oh323_pvt *) malloc(sizeof(struct oh323_pvt));
 769         if (!pvt) {
 770                 ast_log(LOG_ERROR, "Couldn't allocate private structure. This is bad\n");
 771                 return NULL;
 772         }
 773         memset(pvt, 0, sizeof(struct oh323_pvt));
 774         pvt->rtp = ast_rtp_new(sched, io, 1, 0);
 775         if (!pvt->rtp) {
 776                 ast_log(LOG_WARNING, "Unable to create RTP session: %s\n", strerror(errno));
 777                 free(pvt);
 778                 return NULL;
 779         }
 780         ast_rtp_settos(pvt->rtp, tos);
 781         ast_mutex_init(&pvt->lock);
 782         /* Ensure the call token is allocated */
 783         if ((pvt->cd).call_token == NULL) {
 784                 (pvt->cd).call_token = (char *)malloc(128);
 785         }
 786         memset((char *)(pvt->cd).call_token, 0, 128);
 787         if (!pvt->cd.call_token) {
 788                 ast_log(LOG_ERROR, "Not enough memory to alocate call token\n");
 789                 return NULL;
 790         }
 791         pvt->cd.call_reference = callid;
 792         pvt->bridge = bridging;
 793         pvt->dtmfmode = dtmfmode;
 794         if (pvt->dtmfmode & H323_DTMF_RFC2833) {
 795                 pvt->nonCodecCapability |= AST_RTP_DTMF;
 796         }
 797         strncpy(pvt->context, default_context, sizeof(pvt->context) - 1);
 798         /* Add to interface list */
 799         ast_mutex_lock(&iflock);
 800         pvt->next = iflist;
 801         iflist = pvt;
 802         ast_mutex_unlock(&iflock);
 803         return pvt;
 804 }
 805
 806 static struct oh323_pvt *find_call(int call_reference, const char *token)
 807 {
 808         struct oh323_pvt *pvt;
 809
 810         ast_mutex_lock(&iflock);
 811         pvt = iflist;
 812         while(pvt) {
 813                 if ((signed int)pvt->cd.call_reference == call_reference) {
 814                         /* Found the call */
 815                         if ((token != NULL) && (!strcmp(pvt->cd.call_token, token))) {
 816                                 ast_mutex_unlock(&iflock);
 817                                 return pvt;
 818                         } else if (token == NULL) {
 819                                 ast_log(LOG_DEBUG, "Call Token is NULL\n");
 820                                 ast_mutex_unlock(&iflock);
 821                                 return pvt;
 822                         }
 823                 }
 824                 pvt = pvt->next;
 825         }
 826         ast_mutex_unlock(&iflock);
 827         return NULL;
 828 }
 829
 830 struct oh323_user *find_user(const call_details_t cd)
 831 {
 832         struct oh323_user *u;
 833         char iabuf[INET_ADDRSTRLEN];
 834         u = userl.users;
 835         if (userbyalias) {
 836                 while(u) {
 837                         if (!strcasecmp(u->name, cd.call_source_aliases)) {
 838                                 break;
 839                         }
 840                         u = u->next;
 841                 }
 842         } else {
 843                 while(u) {
 844                         if (!strcasecmp(cd.sourceIp, ast_inet_ntoa(iabuf, sizeof(iabuf), u->addr.sin_addr))) {
 845                                 break;
 846                         }
 847                         u = u->next;
 848                 }
 849         }
 850         return u;
 851 }
 852
 853 struct oh323_peer *find_peer(char *peer, struct sockaddr_in *sin)
 854 {
 855         struct oh323_peer *p = NULL;
 856         static char iabuf[INET_ADDRSTRLEN];
 857
 858         p = peerl.peers;
 859         if (peer) {
 860                 while(p) {
 861                         if (!strcasecmp(p->name, peer)) {
 862                                 ast_log(LOG_DEBUG, "Found peer %s by name\n", peer);
 863                                 break;
 864                         }
 865                         p = p->next;
 866                 }
 867         } else {
 868                 /* find by sin */
 869                 if (sin) {
 870                         while (p) {
 871                                 if ((!inaddrcmp(&p->addr, sin)) ||
 872                                         (p->addr.sin_addr.s_addr == sin->sin_addr.s_addr)) {
 873                                         ast_log(LOG_DEBUG, "Found peer %s/%s by addr\n", peer, ast_inet_ntoa(iabuf, sizeof(iabuf), p->addr.sin_addr));
 874                                         break;
 875                                 }
 876                                 p = p->next;
 877                         }
 878                 }
 879         }
 880         if (!p) {
 881                 ast_log(LOG_DEBUG, "Could not find peer %s by name or address\n", peer);
 882         }
 883         return p;
 884 }
 885
 886 static int create_addr(struct oh323_pvt *pvt, char *opeer)
 887 {
 888         struct hostent *hp;
 889         struct ast_hostent ahp;
 890         struct oh323_peer *p;
 891         int portno;
 892         int found = 0;
 893         char *port;
 894         char *hostn;
 895         char peer[256] = "";
 896
 897         strncpy(peer, opeer, sizeof(peer) - 1);
 898         port = strchr(peer, ':');
 899         if (port) {
 900                 *port = '\0';
 901                 port++;
 902         }
 903         pvt->sa.sin_family = AF_INET;
 904         ast_mutex_lock(&peerl.lock);
 905         p = find_peer(peer, NULL);
 906         if (p) {
 907                 found++;
 908                 pvt->capability = p->capability;
 909                 pvt->nat = p->nat;
 910                 if (pvt->rtp) {
 911                         ast_log(LOG_DEBUG, "Setting NAT on RTP to %d\n", pvt->nat);
 912                         ast_rtp_setnat(pvt->rtp, pvt->nat);
 913                 }
 914                 pvt->options.noFastStart = p->noFastStart;
 915                 pvt->options.noH245Tunneling = p->noH245Tunneling;
 916                 pvt->options.noSilenceSuppression = p->noSilenceSuppression;
 917                 if (pvt->dtmfmode) {
 918                         pvt->dtmfmode = p->dtmfmode;
 919                         if (pvt->dtmfmode & H323_DTMF_RFC2833) {
 920                                 pvt->nonCodecCapability |= AST_RTP_DTMF;
 921                         } else {
 922                                 pvt->nonCodecCapability &= ~AST_RTP_DTMF;
 923                         }
 924                 }
 925                 if (p->addr.sin_addr.s_addr) {
 926                         pvt->sa.sin_addr = p->addr.sin_addr;
 927                         pvt->sa.sin_port = p->addr.sin_port;
 928                 }
 929         }
 930         ast_mutex_unlock(&peerl.lock);
 931         if (!p && !found) {
 932                 hostn = peer;
 933                 if (port) {
 934                         portno = atoi(port);
 935                 } else {
 936                         portno = h323_signalling_port;
 937                 }
 938                 hp = ast_gethostbyname(hostn, &ahp);
 939                 if (hp) {
 940                         memcpy(&pvt->sa.sin_addr, hp->h_addr, sizeof(pvt->sa.sin_addr));
 941                         pvt->sa.sin_port = htons(portno);
 942                         return 0;
 943                 } else {
 944                         ast_log(LOG_WARNING, "No such host: %s\n", peer);
 945                         return -1;
 946                 }
 947         } else if (!p) {
 948                 return -1;
 949         } else {
 950                 return 0;
 951         }
 952 }
 953 static struct ast_channel *oh323_request(const char *type, int format, void *data)
 954 {
 955         int oldformat;
 956         struct oh323_pvt *pvt;
 957         struct ast_channel *tmpc = NULL;
 958         char *dest = (char *)data;
 959         char *ext, *host;
 960         char *h323id = NULL;
 961         char tmp[256];
 962
 963         ast_log(LOG_DEBUG, "type=%s, format=%d, data=%s.\n", type, format, (char *)data);
 964         pvt = oh323_alloc(0);
 965         if (!pvt) {
 966                 ast_log(LOG_WARNING, "Unable to build pvt data for '%s'\n", (char *)data);
 967                 return NULL;
 968         }
 969         oldformat = format;
 970         format &= ((AST_FORMAT_MAX_AUDIO << 1) - 1);
 971         if (!format) {
 972                 ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", format);
 973                 return NULL;
 974         }
 975         /* Assign default capabilities */
 976         pvt->capability = capability;
 977         pvt->dtmfmode = H323_DTMF_RFC2833;
 978
 979         strncpy(tmp, dest, sizeof(tmp) - 1);
 980         host = strchr(tmp, '@');
 981         if (host) {
 982                 *host = '\0';
 983                 host++;
 984                 ext = tmp;
 985         } else {
 986                 host = tmp;
 987                 ext = NULL;
 988         }
 989         strtok_r(host, "/", &(h323id));
 990         if (h323id && !ast_strlen_zero(h323id)) {
 991                 h323_set_id(h323id);
 992         }
 993         if (ext) {
 994                 strncpy(pvt->exten, ext, sizeof(pvt->exten) - 1);
 995         }
 996         ast_log(LOG_DEBUG, "Extension: %s Host: %s\n",  pvt->exten, host);
 997         if (!usingGk) {
 998                 if (create_addr(pvt, host)) {
 999                         oh323_destroy(pvt);
1000                         return NULL;
1001                 }
1002         }
1003         /* pass on our capabilites to the H.323 stack */
1004         ast_mutex_lock(&caplock);
1005         h323_set_capability(pvt->capability, pvt->dtmfmode);
1006         ast_mutex_unlock(&caplock);
1007
1008         ast_mutex_lock(&pvt->lock);
1009         tmpc = oh323_new(pvt, AST_STATE_DOWN, host);
1010         ast_mutex_unlock(&pvt->lock);
1011         if (!tmpc) {
1012                 oh323_destroy(pvt);
1013         }
1014         ast_update_use_count();
1015         restart_monitor();
1016         return tmpc;
1017 }
1018
1019 /** Find a call by alias */
1020 struct oh323_alias *find_alias(const char *source_aliases)
1021 {
1022         struct oh323_alias *a;
1023
1024         a = aliasl.aliases;
1025         while(a) {
1026                 if (!strcasecmp(a->name, source_aliases)) {
1027                         break;
1028                 }
1029                 a = a->next;
1030         }
1031         return a;
1032 }
1033
1034 /**
1035   * Callback for sending digits from H.323 up to asterisk
1036   *
1037   */
1038 int send_digit(unsigned call_reference, char digit, const char *token)
1039 {
1040         struct oh323_pvt *pvt;
1041         struct ast_frame f;
1042
1043         ast_log(LOG_DEBUG, "Recieved Digit: %c\n", digit);
1044         pvt = find_call(call_reference, token);
1045         if (!pvt) {
1046                 ast_log(LOG_ERROR, "Private structure not found in send_digit.\n");
1047                 return -1;
1048         }
1049         memset(&f, 0, sizeof(f));
1050         f.frametype = AST_FRAME_DTMF;
1051         f.subclass = digit;
1052         f.datalen = 0;
1053         f.samples = 800;
1054         f.offset = 0;
1055         f.data = NULL;
1056         f.mallocd = 0;
1057         f.src = "SEND_DIGIT";
1058         return ast_queue_frame(pvt->owner, &f);
1059 }
1060
1061 /**
1062   * Callback function used to inform the H.323 stack of the local rtp ip/port details
1063   *
1064   * Returns the local RTP information
1065   */
1066 struct rtp_info *external_rtp_create(unsigned call_reference, const char * token)
1067 {
1068         struct oh323_pvt *pvt;
1069         struct sockaddr_in us;
1070         struct rtp_info *info;
1071         static char iabuf[INET_ADDRSTRLEN];
1072
1073         info = (struct rtp_info *)malloc(sizeof(struct rtp_info));
1074         if (!info) {
1075                 ast_log(LOG_ERROR, "Unable to allocated info structure, this is very bad\n");
1076                 return NULL;
1077         }
1078         pvt = find_call(call_reference, token);
1079         if (!pvt) {
1080                 ast_log(LOG_ERROR, "Unable to find call %s(%d)\n", token, call_reference);
1081                 return NULL;
1082         }
1083         /* figure out our local RTP port and tell the H.323 stack about it */
1084         ast_rtp_get_us(pvt->rtp, &us);
1085         /* evil hack, until I (or someone?) figures out a better way */
1086         info->addr = ast_inet_ntoa(iabuf, sizeof(iabuf), bindaddr.sin_addr);
1087         info->port = ntohs(us.sin_port);
1088         ast_log(LOG_DEBUG, "Sending RTP 'US' %s:%d\n", info->addr, info->port);
1089         return info;
1090 }
1091
1092 /**
1093   * Call-back function passing remote ip/port information from H.323 to asterisk
1094   *
1095   * Returns nothing
1096   */
1097 void setup_rtp_connection(unsigned call_reference, const char *remoteIp, int remotePort, const char *token)
1098 {
1099         struct oh323_pvt *pvt = NULL;
1100         struct sockaddr_in them;
1101
1102         /* Find the call or allocate a private structure if call not found */
1103         pvt = find_call(call_reference, token);
1104         if (!pvt) {
1105                 ast_log(LOG_ERROR, "Something is wrong: rtp\n");
1106                 return;
1107         }
1108         them.sin_family = AF_INET;
1109         /* only works for IPv4 */
1110         them.sin_addr.s_addr = inet_addr(remoteIp);
1111         them.sin_port = htons(remotePort);
1112         ast_rtp_set_peer(pvt->rtp, &them);
1113         return;
1114 }
1115
1116 /**
1117   *     Call-back function to signal asterisk that the channel has been answered
1118   * Returns nothing
1119   */
1120 void connection_made(unsigned call_reference, const char *token)
1121 {
1122         struct ast_channel *c = NULL;
1123         struct oh323_pvt *pvt = NULL;
1124
1125         pvt = find_call(call_reference, token);
1126
1127         if (!pvt) {
1128                 ast_log(LOG_ERROR, "Something is wrong: connection\n");
1129                 return;
1130         }
1131
1132         if (!pvt->owner) {
1133                 ast_log(LOG_ERROR, "Channel has no owner\n");
1134                 return;
1135         }
1136         c = pvt->owner;
1137         ast_setstate(c, AST_STATE_UP);
1138         ast_queue_control(c, AST_CONTROL_ANSWER);
1139         return;
1140 }
1141
1142 /**
1143  *  Call-back function for incoming calls
1144  *
1145  *  Returns 1 on success
1146  */
1147 int setup_incoming_call(call_details_t cd)
1148 {
1149         struct oh323_pvt *pvt = NULL;
1150         struct oh323_user *user = NULL;
1151         struct oh323_alias *alias = NULL;
1152         char iabuf[INET_ADDRSTRLEN];
1153
1154         /* allocate the call*/
1155         pvt = oh323_alloc(cd.call_reference);
1156
1157         if (!pvt) {
1158                 ast_log(LOG_ERROR, "Unable to allocate private structure, this is bad.\n");
1159                 return 0;
1160         }
1161
1162         /* Populate the call details in the private structure */
1163         pvt->cd.call_token = strdup(cd.call_token);
1164         pvt->cd.call_source_aliases = strdup(cd.call_source_aliases);
1165         pvt->cd.call_dest_alias = strdup(cd.call_dest_alias);
1166         pvt->cd.call_source_name = strdup(cd.call_source_name);
1167         pvt->cd.call_source_e164 = strdup(cd.call_source_e164);
1168         pvt->cd.call_dest_e164 = strdup(cd.call_dest_e164);
1169
1170         if (h323debug) {
1171                 ast_verbose(VERBOSE_PREFIX_3 "Setting up Call\n");
1172                 ast_verbose(VERBOSE_PREFIX_3 "\tCall token:  [%s]\n", pvt->cd.call_token);
1173                 ast_verbose(VERBOSE_PREFIX_3 "\tCalling party name:  [%s]\n", pvt->cd.call_source_name);
1174                 ast_verbose(VERBOSE_PREFIX_3 "\tCalling party number:  [%s]\n", pvt->cd.call_source_e164);
1175                 ast_verbose(VERBOSE_PREFIX_3 "\tCalled party name:  [%s]\n", pvt->cd.call_dest_alias);
1176                 ast_verbose(VERBOSE_PREFIX_3 "\tCalled party number:  [%s]\n", pvt->cd.call_dest_e164);
1177         }
1178
1179         /* Decide if we are allowing Gatekeeper routed calls*/
1180         if ((!strcasecmp(cd.sourceIp, gatekeeper)) && (gkroute == -1) && (usingGk)) {
1181                 if (!ast_strlen_zero(cd.call_dest_e164)) {
1182                         strncpy(pvt->exten, cd.call_dest_e164, sizeof(pvt->exten) - 1);
1183                         strncpy(pvt->context, default_context, sizeof(pvt->context) - 1);
1184                 } else {
1185                         alias = find_alias(cd.call_dest_alias);
1186                         if (!alias) {
1187                                 ast_log(LOG_ERROR, "Call for %s rejected, alias not found\n", cd.call_dest_alias);
1188                                 return 0;
1189                         }
1190                         strncpy(pvt->exten, alias->name, sizeof(pvt->exten) - 1);
1191                         strncpy(pvt->context, alias->context, sizeof(pvt->context) - 1);
1192                 }
1193         } else {
1194                 /* Either this call is not from the Gatekeeper
1195                    or we are not allowing gk routed calls */
1196                 user  = find_user(cd);
1197                 if (!user) {
1198                         if (!ast_strlen_zero(pvt->cd.call_dest_e164)) {
1199                                 strncpy(pvt->exten, cd.call_dest_e164, sizeof(pvt->exten) - 1);
1200                         } else {
1201                                 strncpy(pvt->exten, cd.call_dest_alias, sizeof(pvt->exten) - 1);
1202                         }
1203                         if (ast_strlen_zero(default_context)) {
1204                                 ast_log(LOG_ERROR, "Call from '%s' rejected due to no default context\n", pvt->cd.call_source_aliases);
1205                                 return 0;
1206                         }
1207                         strncpy(pvt->context, default_context, sizeof(pvt->context) - 1);
1208                         ast_log(LOG_DEBUG, "Sending %s to context [%s]\n", cd.call_source_aliases, pvt->context);
1209                 } else {
1210                         if (user->host) {
1211                                 if (strcasecmp(cd.sourceIp, ast_inet_ntoa(iabuf, sizeof(iabuf), user->addr.sin_addr))){
1212                                         if (ast_strlen_zero(user->context)) {
1213                                                 if (ast_strlen_zero(default_context)) {
1214                                                         ast_log(LOG_ERROR, "Call from '%s' rejected due to non-matching IP address (%s) and no default context\n", user->name, cd.sourceIp);
1215                                                         return 0;
1216                                                 }
1217                                                 strncpy(pvt->context, default_context, sizeof(pvt->context) - 1);
1218                                         } else {
1219                                                 strncpy(pvt->context, user->context, sizeof(pvt->context) - 1);
1220                                         }
1221                                         pvt->exten[0] = 'i';
1222                                         pvt->exten[1] = '\0';
1223                                         ast_log(LOG_ERROR, "Call from '%s' rejected due to non-matching IP address (%s)s\n", user->name, cd.sourceIp);
1224                                         goto exit;
1225                                 }
1226                         }
1227                         strncpy(pvt->context, user->context, sizeof(pvt->context) - 1);
1228                         pvt->bridge = user->bridge;
1229                         pvt->nat = user->nat;
1230                         if (!ast_strlen_zero(pvt->cd.call_dest_e164)) {
1231                                 strncpy(pvt->exten, cd.call_dest_e164, sizeof(pvt->exten) - 1);
1232                         } else {
1233                                 strncpy(pvt->exten, cd.call_dest_alias, sizeof(pvt->exten) - 1);
1234                         }
1235                         if (!ast_strlen_zero(user->accountcode)) {
1236                                 strncpy(pvt->accountcode, user->accountcode, sizeof(pvt->accountcode) - 1);
1237                         }
1238                         if (user->amaflags) {
1239                                 pvt->amaflags = user->amaflags;
1240                         }
1241                 }
1242         }
1243 exit:
1244         return 1;
1245 }
1246
1247 /**
1248  * Call-back function to start PBX when OpenH323 ready to serve incoming call
1249  *
1250  * Returns 1 on success
1251  */
1252 static int answer_call(unsigned call_reference, const char *token)
1253 {
1254         struct oh323_pvt *pvt = NULL;
1255         struct ast_channel *c = NULL;
1256
1257         /* Find the call or allocate a private structure if call not found */
1258         pvt = find_call(call_reference, token);
1259         if (!pvt) {
1260                 ast_log(LOG_ERROR, "Something is wrong: answer_call\n");
1261                 return 0;
1262         }
1263         /* allocate a channel and tell asterisk about it */
1264         c = oh323_new(pvt, AST_STATE_RINGING, pvt->cd.call_token);
1265         if (!c) {
1266                 ast_log(LOG_ERROR, "Couldn't create channel. This is bad\n");
1267                 return 0;
1268         }
1269         return 1;
1270 }
1271
1272 /**
1273  * Call-back function to establish an outgoing H.323 call
1274  *
1275  * Returns 1 on success
1276  */
1277 int setup_outgoing_call(call_details_t cd)
1278 {
1279         return 1;
1280 }
1281
1282 /**
1283   *  Call-back function to signal asterisk that the channel is ringing
1284   *  Returns nothing
1285   */
1286 void chan_ringing(unsigned call_reference, const char *token)
1287 {
1288         struct ast_channel *c = NULL;
1289         struct oh323_pvt *pvt = NULL;
1290
1291         pvt = find_call(call_reference, token);
1292         if (!pvt) {
1293                 ast_log(LOG_ERROR, "Something is wrong: ringing\n");
1294         }
1295         if (!pvt->owner) {
1296                 ast_log(LOG_ERROR, "Channel has no owner\n");
1297                 return;
1298         }
1299         c = pvt->owner;
1300         ast_setstate(c, AST_STATE_RINGING);
1301         ast_queue_control(c, AST_CONTROL_RINGING);
1302         return;
1303 }
1304
1305 void cleanup_call_details(call_details_t cd)
1306 {
1307         if (cd.call_token) {
1308                 free(cd.call_token);
1309         }
1310         if (cd.call_source_aliases) {
1311                 free(cd.call_source_aliases);
1312         }
1313         if (cd.call_dest_alias) {
1314                 free(cd.call_dest_alias);
1315         }
1316         if (cd.call_source_name) {
1317                 free(cd.call_source_name);
1318         }
1319         if (cd.call_source_e164) {
1320                 free(cd.call_source_e164);
1321         }
1322         if (cd.call_dest_e164) {
1323                 free(cd.call_dest_e164);
1324         }
1325         if (cd.sourceIp) {
1326                 free(cd.sourceIp);
1327         }
1328 }
1329
1330 /**
1331   * Call-back function to cleanup communication
1332   * Returns nothing,
1333   */
1334 void cleanup_connection(call_details_t cd)
1335 {
1336         struct oh323_pvt *pvt = NULL;
1337         struct ast_rtp *rtp = NULL;
1338
1339         pvt = find_call(cd.call_reference, cd.call_token);
1340         if (!pvt) {
1341                 return;
1342         }
1343         ast_mutex_lock(&pvt->lock);
1344         if (pvt->rtp) {
1345                 rtp = pvt->rtp;
1346                 pvt->rtp = NULL;
1347                 /* Immediately stop RTP */
1348                 ast_rtp_destroy(rtp);
1349         }
1350         cleanup_call_details(pvt->cd);
1351         pvt->alreadygone = 1;
1352         /* Send hangup */
1353         if (pvt->owner) {
1354                 ast_queue_hangup(pvt->owner);
1355         }
1356         ast_mutex_unlock(&pvt->lock);
1357         return;
1358 }
1359
1360 static void *do_monitor(void *data)
1361 {
1362         int res;
1363         int reloading;
1364         struct oh323_pvt *oh323 = NULL;
1365
1366         for(;;) {
1367                  /* Check for a reload request */
1368                 ast_mutex_lock(&h323_reload_lock);
1369                 reloading = h323_reloading;
1370                 h323_reloading = 0;
1371                 ast_mutex_unlock(&h323_reload_lock);
1372                 if (reloading) {
1373                         if (option_verbose > 0) {
1374                                 ast_verbose(VERBOSE_PREFIX_1 "Reloading H.323\n");
1375                         }
1376                         h323_do_reload();
1377                 }
1378                 /* Check for interfaces needing to be killed */
1379                 ast_mutex_lock(&iflock);
1380 restartsearch:
1381                 oh323 = iflist;
1382                 while(oh323) {
1383                         if (oh323->needdestroy) {
1384                                 __oh323_destroy(oh323);
1385                                 goto restartsearch;
1386                         }
1387                         oh323 = oh323->next;
1388                 }
1389                 ast_mutex_unlock(&iflock);
1390                 pthread_testcancel();
1391                 /* Wait for sched or io */
1392                 res = ast_sched_wait(sched);
1393                 if ((res < 0) || (res > 1000)) {
1394                         res = 1000;
1395                 }
1396                 res = ast_io_wait(io, res);
1397                 ast_mutex_lock(&monlock);
1398                 if (res >= 0) {
1399                         ast_sched_runq(sched);
1400                 }
1401                 ast_mutex_unlock(&monlock);
1402         }
1403         /* Never reached */
1404         return NULL;
1405 }
1406
1407 static int restart_monitor(void)
1408 {
1409         pthread_attr_t attr;
1410         /* If we're supposed to be stopped -- stay stopped */
1411         if (monitor_thread == AST_PTHREADT_STOP) {
1412                 return 0;
1413         }
1414         if (ast_mutex_lock(&monlock)) {
1415                 ast_log(LOG_WARNING, "Unable to lock monitor\n");
1416                 return -1;
1417         }
1418         if (monitor_thread == pthread_self()) {
1419                 ast_mutex_unlock(&monlock);
1420                 ast_log(LOG_WARNING, "Cannot kill myself\n");
1421                 return -1;
1422         }
1423         if (monitor_thread && (monitor_thread != AST_PTHREADT_NULL)) {
1424                 /* Wake up the thread */
1425                 pthread_kill(monitor_thread, SIGURG);
1426         } else {
1427                 pthread_attr_init(&attr);
1428                 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
1429                 /* Start a new monitor */
1430                 if (ast_pthread_create(&monitor_thread, &attr, do_monitor, NULL) < 0) {
1431                         ast_mutex_unlock(&monlock);
1432                         ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
1433                         return -1;
1434                 }
1435
1436         }
1437         ast_mutex_unlock(&monlock);
1438         return 0;
1439 }
1440
1441 static int h323_do_trace(int fd, int argc, char *argv[])
1442 {
1443         if (argc != 3) {
1444                 return RESULT_SHOWUSAGE;
1445         }
1446         h323_debug(1, atoi(argv[2]));
1447         ast_cli(fd, "H.323 trace set to level %s\n", argv[2]);
1448         return RESULT_SUCCESS;
1449 }
1450
1451 static int h323_no_trace(int fd, int argc, char *argv[])
1452 {
1453         if (argc != 3) {
1454                 return RESULT_SHOWUSAGE;
1455         }
1456         h323_debug(0,0);
1457         ast_cli(fd, "H.323 trace disabled\n");
1458         return RESULT_SUCCESS;
1459 }
1460
1461 static int h323_do_debug(int fd, int argc, char *argv[])
1462 {
1463         if (argc != 2) {
1464                 return RESULT_SHOWUSAGE;
1465         }
1466         h323debug = 1;
1467         ast_cli(fd, "H323 debug enabled\n");
1468         return RESULT_SUCCESS;
1469 }
1470
1471 static int h323_no_debug(int fd, int argc, char *argv[])
1472 {
1473         if (argc != 3) {
1474                 return RESULT_SHOWUSAGE;
1475         }
1476         h323debug = 0;
1477         ast_cli(fd, "H323 Debug disabled\n");
1478         return RESULT_SUCCESS;
1479 }
1480
1481 static int h323_gk_cycle(int fd, int argc, char *argv[])
1482 {
1483         return RESULT_SUCCESS;
1484 #if 0
1485         if (argc != 3) {
1486                 return RESULT_SHOWUSAGE;
1487         }
1488         h323_gk_urq();
1489
1490         /* Possibly register with a GK */
1491         if (!gatekeeper_disable) {
1492                 if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
1493                         ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
1494                 }
1495         }
1496         return RESULT_SUCCESS;
1497 #endif
1498 }
1499
1500 static int h323_ep_hangup(int fd, int argc, char *argv[])
1501 {
1502         if (argc != 3) {
1503                 return RESULT_SHOWUSAGE;
1504         }
1505         if (h323_soft_hangup(argv[2])) {
1506                 ast_verbose(VERBOSE_PREFIX_3 "Hangup succeeded on %s\n", argv[2]);
1507         } else {
1508                 ast_verbose(VERBOSE_PREFIX_3 "Hangup failed for %s\n", argv[2]);
1509         }
1510         return RESULT_SUCCESS;
1511 }
1512
1513 static int h323_tokens_show(int fd, int argc, char *argv[])
1514 {
1515         if (argc != 3) {
1516                 return RESULT_SHOWUSAGE;
1517         }
1518         h323_show_tokens();
1519         return RESULT_SUCCESS;
1520 }
1521
1522 static char trace_usage[] =
1523 "Usage: h.323 trace <level num>\n"
1524 "       Enables H.323 stack tracing for debugging purposes\n";
1525
1526 static char no_trace_usage[] =
1527 "Usage: h.323 no trace\n"
1528 "       Disables H.323 stack tracing for debugging purposes\n";
1529
1530 static char debug_usage[] =
1531 "Usage: h.323 debug\n"
1532 "       Enables H.323 debug output\n";
1533
1534 static char no_debug_usage[] =
1535 "Usage: h.323 no debug\n"
1536 "       Disables H.323 debug output\n";
1537
1538 static char show_codec_usage[] =
1539 "Usage: h.323 show codec\n"
1540 "       Shows all enabled codecs\n";
1541
1542 static char show_cycle_usage[] =
1543 "Usage: h.323 gk cycle\n"
1544 "       Manually re-register with the Gatekeper (Currently Disabled)\n";
1545
1546 static char show_hangup_usage[] =
1547 "Usage: h.323 hangup <token>\n"
1548 "       Manually try to hang up call identified by <token>\n";
1549
1550 static char show_tokens_usage[] =
1551 "Usage: h.323 show tokens\n"
1552 "       Print out all active call tokens\n";
1553
1554 static char h323_reload_usage[] =
1555 "Usage: h323 reload\n"
1556 "       Reloads H.323 configuration from sip.conf\n";
1557
1558 static struct ast_cli_entry  cli_trace =
1559         { { "h.323", "trace", NULL }, h323_do_trace, "Enable H.323 Stack Tracing", trace_usage };
1560 static struct ast_cli_entry  cli_no_trace =
1561         { { "h.323", "no", "trace", NULL }, h323_no_trace, "Disable H.323 Stack Tracing", no_trace_usage };
1562 static struct ast_cli_entry  cli_debug =
1563         { { "h.323", "debug", NULL }, h323_do_debug, "Enable H.323 debug", debug_usage };
1564 static struct ast_cli_entry  cli_no_debug =
1565         { { "h.323", "no", "debug", NULL }, h323_no_debug, "Disable H.323 debug", no_debug_usage };
1566 static struct ast_cli_entry  cli_show_codecs =
1567         { { "h.323", "show", "codecs", NULL }, h323_show_codec, "Show enabled codecs", show_codec_usage };
1568 static struct ast_cli_entry  cli_gk_cycle =
1569         { { "h.323", "gk", "cycle", NULL }, h323_gk_cycle, "Manually re-register with the Gatekeper", show_cycle_usage };
1570 static struct ast_cli_entry  cli_hangup_call =
1571         { { "h.323", "hangup", NULL }, h323_ep_hangup, "Manually try to hang up a call", show_hangup_usage };
1572 static struct ast_cli_entry  cli_show_tokens =
1573         { { "h.323", "show", "tokens", NULL }, h323_tokens_show, "Show all active call tokens", show_tokens_usage };
1574
1575 int reload_config(void)
1576 {
1577         int format;
1578         struct ast_config *cfg;
1579         struct ast_variable *v;
1580         struct oh323_peer *peer   = NULL;
1581         struct oh323_user *user   = NULL;
1582         struct oh323_alias *alias = NULL;
1583         struct ast_hostent ahp; struct hostent *hp;
1584         char *cat;
1585         char *utype;
1586
1587         cfg = ast_load(config);
1588
1589         /* We *must* have a config file otherwise stop immediately */
1590         if (!cfg) {
1591                 ast_log(LOG_NOTICE, "Unable to load config %s, H.323 disabled\n", config);
1592                 return 1;
1593         }
1594
1595        /* fire up the H.323 Endpoint */
1596         if (!h323_end_point_exist()) {
1597                h323_end_point_create();
1598         }
1599         h323debug = 0;
1600         dtmfmode = H323_DTMF_RFC2833;
1601         memset(&bindaddr, 0, sizeof(bindaddr));
1602         v = ast_variable_browse(cfg, "general");
1603         while(v) {
1604                 /* Create the interface list */
1605                 if (!strcasecmp(v->name, "port")) {
1606                         h323_signalling_port = (int)strtol(v->value, NULL, 10);
1607                 } else if (!strcasecmp(v->name, "bindaddr")) {
1608                         if (!(hp = ast_gethostbyname(v->value, &ahp))) {
1609                                 ast_log(LOG_WARNING, "Invalid address: %s\n", v->value);
1610                         } else {
1611                                 memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
1612                         }
1613                 } else if (!strcasecmp(v->name, "allow")) {
1614                         format = ast_getformatbyname(v->value);
1615                         if (format < 1)
1616                                 ast_log(LOG_WARNING, "Cannot allow unknown format '%s'\n", v->value);
1617                         else
1618                                 capability |= format;
1619                 } else if (!strcasecmp(v->name, "disallow")) {
1620                         format = ast_getformatbyname(v->value);
1621                         if (format < 1)
1622                                 ast_log(LOG_WARNING, "Cannot disallow unknown format '%s'\n", v->value);
1623                         else
1624                                 capability &= ~format;
1625                 } else if (!strcasecmp(v->name, "tos")) {
1626                         if (sscanf(v->value, "%i", &format)) {
1627                                 tos = format & 0xff;
1628                         } else if (!strcasecmp(v->value, "lowdelay")) {
1629                                 tos = IPTOS_LOWDELAY;
1630                         } else if (!strcasecmp(v->value, "throughput")) {
1631                                 tos = IPTOS_THROUGHPUT;
1632                         } else if (!strcasecmp(v->value, "reliability")) {
1633                                 tos = IPTOS_RELIABILITY;
1634                         } else if (!strcasecmp(v->value, "mincost")) {
1635                                 tos = IPTOS_MINCOST;
1636                         } else if (!strcasecmp(v->value, "none")) {
1637                                 tos = 0;
1638                         } else {
1639                                 ast_log(LOG_WARNING, "Invalid tos value at line %d, should be 'lowdelay', 'throughput', 'reliability', 'mincost', or 'none'\n", v->lineno);
1640                         }
1641                 } else if (!strcasecmp(v->name, "gatekeeper")) {
1642                         if (!strcasecmp(v->value, "DISABLE")) {
1643                                 gatekeeper_disable = 1;
1644                                 usingGk = 0;
1645                         } else if (!strcasecmp(v->value, "DISCOVER")) {
1646                                 gatekeeper_disable = 0;
1647                                 gatekeeper_discover = 1;
1648                                 usingGk = 1;
1649                         } else {
1650                                 gatekeeper_disable = 0;
1651                                 usingGk = 1;
1652                                 strncpy(gatekeeper, v->value, sizeof(gatekeeper) - 1);
1653                         }
1654                 } else if (!strcasecmp(v->name, "secret")) {
1655                         strncpy(secret, v->value, sizeof(secret) - 1);
1656                 } else if (!strcasecmp(v->name, "AllowGKRouted")) {
1657                         gkroute = ast_true(v->value);
1658                 } else if (!strcasecmp(v->name, "context")) {
1659                         strncpy(default_context, v->value, sizeof(default_context) - 1);
1660                         ast_verbose(VERBOSE_PREFIX_2 "Setting default context to %s\n", default_context);
1661                 } else if (!strcasecmp(v->name, "dtmfmode")) {
1662                         if (!strcasecmp(v->value, "inband")) {
1663                                 dtmfmode=H323_DTMF_INBAND;
1664                         } else if (!strcasecmp(v->value, "rfc2833")) {
1665                                 dtmfmode = H323_DTMF_RFC2833;
1666                         } else {
1667                                 ast_log(LOG_WARNING, "Unknown dtmf mode '%s', using rfc2833\n", v->value);
1668                                 dtmfmode = H323_DTMF_RFC2833;
1669                         }
1670                 } else if (!strcasecmp(v->name, "UserByAlias")) {
1671                         userbyalias = ast_true(v->value);
1672                 } else if (!strcasecmp(v->name, "bridge")) {
1673                         bridging = ast_true(v->value);
1674                 } else if (!strcasecmp(v->name, "noFastStart")) {
1675                         noFastStart = ast_true(v->value);
1676                 } else if (!strcasecmp(v->name, "noH245Tunneling")) {
1677                         noH245Tunneling = ast_true(v->value);
1678                 }
1679                 v = v->next;
1680         }
1681
1682         cat = ast_category_browse(cfg, NULL);
1683         while(cat) {
1684                 if (strcasecmp(cat, "general")) {
1685                         utype = ast_variable_retrieve(cfg, cat, "type");
1686                         if (utype) {
1687                                 if (!strcasecmp(utype, "user") || !strcasecmp(utype, "friend")) {
1688                                         user = build_user(cat, ast_variable_browse(cfg, cat));
1689                                         if (user) {
1690                                                 ast_mutex_lock(&userl.lock);
1691                                                 user->next = userl.users;
1692                                                 userl.users = user;
1693                                                 ast_mutex_unlock(&userl.lock);
1694                                         }
1695                                 }  else if (!strcasecmp(utype, "peer") || !strcasecmp(utype, "friend")) {
1696                                         peer = build_peer(cat, ast_variable_browse(cfg, cat));
1697                                         if (peer) {
1698                                                 ast_mutex_lock(&peerl.lock);
1699                                                 peer->next = peerl.peers;
1700                                                 peerl.peers = peer;
1701                                                 ast_mutex_unlock(&peerl.lock);
1702                                         }
1703                                 }  else if (!strcasecmp(utype, "h323") || !strcasecmp(utype, "alias")) {
1704                                         alias = build_alias(cat, ast_variable_browse(cfg, cat));
1705                                         if (alias) {
1706                                                 ast_mutex_lock(&aliasl.lock);
1707                                                 alias->next = aliasl.aliases;
1708                                                 aliasl.aliases = alias;
1709                                                 ast_mutex_unlock(&aliasl.lock);
1710                                         }
1711                                 } else {
1712                                         ast_log(LOG_WARNING, "Unknown type '%s' for '%s' in %s\n", utype, cat, config);
1713                                 }
1714                         } else {
1715                                 ast_log(LOG_WARNING, "Section '%s' lacks type\n", cat);
1716                         }
1717                 }
1718                 cat = ast_category_browse(cfg, cat);
1719         }
1720         ast_destroy(cfg);
1721
1722         /* Register our H.323 aliases if any*/
1723         while (alias) {
1724                 if (h323_set_alias(alias)) {
1725                         ast_log(LOG_ERROR, "Alias %s rejected by endpoint\n", alias->name);
1726                         return -1;
1727                 }
1728                 alias = alias->next;
1729         }
1730
1731         /* Add our capabilities */
1732         ast_mutex_lock(&caplock);
1733         if (h323_set_capability(capability, dtmfmode)) {
1734                 ast_log(LOG_ERROR, "Capabilities failure, this is bad.\n");
1735                 ast_mutex_unlock(&caplock);
1736                 return -1;
1737         }
1738         ast_mutex_unlock(&caplock);
1739         return 0;
1740 }
1741
1742 void delete_users(void)
1743 {
1744         struct oh323_user *user, *userlast;
1745         struct oh323_peer *peer;
1746
1747         /* Delete all users */
1748         ast_mutex_lock(&userl.lock);
1749         for (user=userl.users;user;) {
1750                 userlast = user;
1751                 user=user->next;
1752                 free(userlast);
1753         }
1754         userl.users=NULL;
1755         ast_mutex_unlock(&userl.lock);
1756         ast_mutex_lock(&peerl.lock);
1757         for (peer=peerl.peers;peer;) {
1758                 /* Assume all will be deleted, and we'll find out for sure later */
1759                 peer->delme = 1;
1760                 peer = peer->next;
1761         }
1762         ast_mutex_unlock(&peerl.lock);
1763 }
1764
1765 void delete_aliases(void)
1766 {
1767         struct oh323_alias *alias, *aliaslast;
1768
1769         /* Delete all users */
1770         ast_mutex_lock(&aliasl.lock);
1771         for (alias=aliasl.aliases;alias;) {
1772                 aliaslast = alias;
1773                 alias=alias->next;
1774                 free(aliaslast);
1775         }
1776         aliasl.aliases=NULL;
1777         ast_mutex_unlock(&aliasl.lock);
1778 }
1779
1780 void prune_peers(void)
1781 {
1782         /* Prune peers who still are supposed to be deleted */
1783         struct oh323_peer *peer, *peerlast, *peernext;
1784         ast_mutex_lock(&peerl.lock);
1785         peerlast = NULL;
1786         for (peer=peerl.peers;peer;) {
1787                 peernext = peer->next;
1788                 if (peer->delme) {
1789                         free(peer);
1790                         if (peerlast) {
1791                                 peerlast->next = peernext;
1792                         } else {
1793                                 peerl.peers = peernext;
1794                         }
1795                 } else {
1796                         peerlast = peer;
1797                 }
1798                 peer = peernext;
1799         }
1800         ast_mutex_unlock(&peerl.lock);
1801 }
1802
1803 static int h323_reload(int fd, int argc, char *argv[])
1804 {
1805         ast_mutex_lock(&h323_reload_lock);
1806         if (h323_reloading) {
1807                 ast_verbose("Previous H.323 reload not yet done\n");
1808         } else {
1809                 h323_reloading = 1;
1810         }
1811         ast_mutex_unlock(&h323_reload_lock);
1812         restart_monitor();
1813         return 0;
1814 }
1815
1816 static int h323_do_reload(void)
1817 {
1818         delete_users();
1819         delete_aliases();
1820         prune_peers();
1821         reload_config();
1822         restart_monitor();
1823         return 0;
1824 }
1825
1826 int reload(void)
1827 {
1828         return h323_reload(0, 0, NULL);
1829 }
1830
1831 static struct ast_cli_entry  cli_h323_reload =
1832         { { "h.323", "reload", NULL }, h323_reload, "Reload H.323 configuration", h323_reload_usage };
1833
1834 static struct ast_rtp *oh323_get_rtp_peer(struct ast_channel *chan)
1835 {
1836         struct oh323_pvt *p;
1837         p = (struct oh323_pvt *) chan->pvt->pvt;
1838         if (p && p->rtp && p->bridge) {
1839                 return p->rtp;
1840         }
1841         return NULL;
1842 }
1843
1844 static struct ast_rtp *oh323_get_vrtp_peer(struct ast_channel *chan)
1845 {
1846         return NULL;
1847 }
1848
1849 static char *convertcap(int cap)
1850 {
1851         switch (cap) {
1852         case AST_FORMAT_G723_1:
1853                 return "G.723";
1854         case AST_FORMAT_GSM:
1855                 return "GSM";
1856         case AST_FORMAT_ULAW:
1857                 return "ULAW";
1858         case AST_FORMAT_ALAW:
1859                 return "ALAW";
1860         case AST_FORMAT_ADPCM:
1861                 return "G.728";
1862         case AST_FORMAT_G729A:
1863                 return "G.729";
1864         case AST_FORMAT_SPEEX:
1865                 return "SPEEX";
1866         case AST_FORMAT_ILBC:
1867                 return "ILBC";
1868         default:
1869                 ast_log(LOG_NOTICE, "Don't know how to deal with mode %d\n", cap);
1870                 return NULL;
1871         }
1872 }
1873
1874 static int oh323_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp, int codecs)
1875 {
1876         /* XXX Deal with Video */
1877         struct oh323_pvt *p;
1878         struct sockaddr_in them;
1879         struct sockaddr_in us;
1880         char *mode;
1881         char iabuf[INET_ADDRSTRLEN];
1882
1883         if (!rtp) {
1884                 return 0;
1885         }
1886
1887         mode = convertcap(chan->writeformat);
1888         p = (struct oh323_pvt *) chan->pvt->pvt;
1889         if (!p) {
1890                 ast_log(LOG_ERROR, "No Private Structure, this is bad\n");
1891                 return -1;
1892         }
1893         ast_rtp_get_peer(rtp, &them);
1894         ast_rtp_get_us(rtp, &us);
1895         h323_native_bridge(p->cd.call_token, ast_inet_ntoa(iabuf, sizeof(iabuf), them.sin_addr), mode);
1896         return 0;
1897 }
1898
1899 static struct ast_rtp_protocol oh323_rtp = {
1900         get_rtp_info: oh323_get_rtp_peer,
1901         get_vrtp_info: oh323_get_vrtp_peer,
1902         set_rtp_peer: oh323_set_rtp_peer,
1903 };
1904
1905 int load_module()
1906 {
1907         int res;
1908         ast_mutex_init(&userl.lock);
1909         ast_mutex_init(&peerl.lock);
1910         ast_mutex_init(&aliasl.lock);
1911         sched = sched_context_create();
1912         if (!sched) {
1913                 ast_log(LOG_WARNING, "Unable to create schedule context\n");
1914         }
1915         io = io_context_create();
1916         if (!io) {
1917                 ast_log(LOG_WARNING, "Unable to create I/O context\n");
1918         }
1919         res = reload_config();
1920         if (res) {
1921                 return 0;
1922         } else {
1923                 /* Make sure we can register our channel type */
1924                 if (ast_channel_register(type, tdesc, capability, oh323_request)) {
1925                         ast_log(LOG_ERROR, "Unable to register channel class %s\n", type);
1926                         h323_end_process();
1927                         return -1;
1928                 }
1929                 ast_cli_register(&cli_debug);
1930                 ast_cli_register(&cli_no_debug);
1931                 ast_cli_register(&cli_trace);
1932                 ast_cli_register(&cli_no_trace);
1933                 ast_cli_register(&cli_show_codecs);
1934                 ast_cli_register(&cli_gk_cycle);
1935                 ast_cli_register(&cli_hangup_call);
1936                 ast_cli_register(&cli_show_tokens);
1937                 ast_cli_register(&cli_h323_reload);
1938
1939                 oh323_rtp.type = type;
1940                 ast_rtp_proto_register(&oh323_rtp);
1941
1942                 /* Register our callback functions */
1943                 h323_callback_register(setup_incoming_call,
1944                                        setup_outgoing_call,
1945                                        external_rtp_create,
1946                                        setup_rtp_connection,
1947                                        cleanup_connection,
1948                                        chan_ringing,
1949                                        connection_made,
1950                                        send_digit,
1951                                        answer_call);
1952                 /* start the h.323 listener */
1953                 if (h323_start_listener(h323_signalling_port, bindaddr)) {
1954                         ast_log(LOG_ERROR, "Unable to create H323 listener.\n");
1955                         return -1;
1956                 }
1957                 /* Possibly register with a GK */
1958                 if (!gatekeeper_disable) {
1959                         if (h323_set_gk(gatekeeper_discover, gatekeeper, secret)) {
1960                                 ast_log(LOG_ERROR, "Gatekeeper registration failed.\n");
1961                                 return 0;
1962                         }
1963                 }
1964                 /* And start the monitor for the first time */
1965                 restart_monitor();
1966         }
1967         return res;
1968 }
1969
1970 int unload_module()
1971 {
1972         struct oh323_pvt *p, *pl;
1973
1974         /* unregister commands */
1975         ast_cli_unregister(&cli_debug);
1976         ast_cli_unregister(&cli_no_debug);
1977         ast_cli_unregister(&cli_trace);
1978         ast_cli_unregister(&cli_no_trace);
1979         ast_cli_unregister(&cli_show_codecs);
1980         ast_cli_unregister(&cli_gk_cycle);
1981         ast_cli_unregister(&cli_hangup_call);
1982         ast_cli_unregister(&cli_show_tokens);
1983         ast_cli_unregister(&cli_h323_reload);
1984         ast_rtp_proto_unregister(&oh323_rtp);
1985         ast_channel_unregister(type);
1986
1987         if (!ast_mutex_lock(&iflock)) {
1988                 /* hangup all interfaces if they have an owner */
1989                 p = iflist;
1990                 while(p) {
1991                         if (p->owner) {
1992                                 ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
1993                         }
1994                         p = p->next;
1995                 }
1996                 iflist = NULL;
1997                 ast_mutex_unlock(&iflock);
1998         } else {
1999                 ast_log(LOG_WARNING, "Unable to lock the interface list\n");
2000                 return -1;
2001         }
2002         if (!ast_mutex_lock(&monlock)) {
2003                 if (monitor_thread && (monitor_thread != AST_PTHREADT_STOP)) {
2004                         /* this causes a seg, anyone know why? */
2005                         pthread_cancel(monitor_thread);
2006                         pthread_kill(monitor_thread, SIGURG);
2007                         pthread_join(monitor_thread, NULL);
2008                  }
2009                 monitor_thread = AST_PTHREADT_STOP;
2010                 ast_mutex_unlock(&monlock);
2011         } else {
2012                 ast_log(LOG_WARNING, "Unable to lock the monitor\n");
2013                 return -1;
2014         }
2015         if (!ast_mutex_lock(&iflock)) {
2016                 /* destroy all the interfaces and free their memory */
2017                 p = iflist;
2018                 while(p) {
2019                         pl = p;
2020                         p = p->next;
2021                         /* free associated memory */
2022                         ast_mutex_destroy(&pl->lock);
2023                         free(pl);
2024                 }
2025                 iflist = NULL;
2026                 ast_mutex_unlock(&iflock);
2027         } else {
2028                 ast_log(LOG_WARNING, "Unable to lock the interface list\n");
2029                 return -1;
2030         }
2031         h323_gk_urq();
2032         h323_end_process();
2033         ast_mutex_destroy(&userl.lock);
2034         ast_mutex_destroy(&peerl.lock);
2035         return 0;
2036 }
2037
2038 int usecount()
2039 {
2040         int res;
2041         ast_mutex_lock(&usecnt_lock);
2042         res = usecnt;
2043         ast_mutex_unlock(&usecnt_lock);
2044         return res;
2045 }
2046
2047 char *description()
2048 {
2049         return desc;
2050 }
2051
2052 char *key()
2053 {
2054         return ASTERISK_GPL_KEY;
2055 }