channels/chan_gtalk.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 1999 - 2005, Digium, Inc.
   5  *
   6  * Matt O'Gorman <mogorman@digium.com>
   7  *
   8  * See http://www.asterisk.org for more information about
   9  * the Asterisk project. Please do not directly contact
  10  * any of the maintainers of this project for assistance;
  11  * the project provides a web site, mailing lists and IRC
  12  * channels for your use.
  13  *
  14  * This program is free software, distributed under the terms of
  15  * the GNU General Public License Version 2. See the LICENSE file
  16  * at the top of the source tree.
  17  */
  18
  19 /*! \file
  20  *
  21  * \author Matt O'Gorman <mogorman@digium.com>
  22  *
  23  * \brief Gtalk Channel Driver, until google/libjingle works with jingle spec
  24  *
  25  * \ingroup channel_drivers
  26  */
  27
  28 /*** MODULEINFO
  29         <depend>iksemel</depend>
  30  ***/
  31
  32 #include "asterisk.h"
  33
  34 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  35
  36 #include <stdlib.h>
  37 #include <stdio.h>
  38 #include <string.h>
  39 #include <unistd.h>
  40 #include <sys/socket.h>
  41 #include <errno.h>
  42 #include <stdlib.h>
  43 #include <fcntl.h>
  44 #include <netdb.h>
  45 #include <netinet/in.h>
  46 #include <arpa/inet.h>
  47 #include <sys/signal.h>
  48 #include <iksemel.h>
  49
  50 #include "asterisk/lock.h"
  51 #include "asterisk/channel.h"
  52 #include "asterisk/config.h"
  53 #include "asterisk/logger.h"
  54 #include "asterisk/module.h"
  55 #include "asterisk/pbx.h"
  56 #include "asterisk/options.h"
  57 #include "asterisk/lock.h"
  58 #include "asterisk/sched.h"
  59 #include "asterisk/io.h"
  60 #include "asterisk/rtp.h"
  61 #include "asterisk/acl.h"
  62 #include "asterisk/callerid.h"
  63 #include "asterisk/file.h"
  64 #include "asterisk/cli.h"
  65 #include "asterisk/app.h"
  66 #include "asterisk/musiconhold.h"
  67 #include "asterisk/manager.h"
  68 #include "asterisk/stringfields.h"
  69 #include "asterisk/utils.h"
  70 #include "asterisk/causes.h"
  71 #include "asterisk/astobj.h"
  72 #include "asterisk/abstract_jb.h"
  73 #include "asterisk/jabber.h"
  74
  75 #define GOOGLE_CONFIG "gtalk.conf"
  76
  77 #define GOOGLE_NS "http://www.google.com/session"
  78
  79
  80 /*! Global jitterbuffer configuration - by default, jb is disabled */
  81 static struct ast_jb_conf default_jbconf =
  82 {
  83         .flags = 0,
  84         .max_size = -1,
  85         .resync_threshold = -1,
  86         .impl = ""
  87 };
  88 static struct ast_jb_conf global_jbconf;
  89
  90 enum gtalk_protocol {
  91         AJI_PROTOCOL_UDP = 1,
  92         AJI_PROTOCOL_SSLTCP = 2,
  93 };
  94
  95 enum gtalk_connect_type {
  96         AJI_CONNECT_STUN = 1,
  97         AJI_CONNECT_LOCAL = 2,
  98         AJI_CONNECT_RELAY = 3,
  99 };
 100
 101 struct gtalk_pvt {
 102         ast_mutex_t lock;                /*!< Channel private lock */
 103         time_t laststun;
 104         struct gtalk *parent;            /*!< Parent client */
 105         char sid[100];
 106         char us[100];
 107         char them[100];
 108         char ring[10];                   /*!< Message ID of ring */
 109         iksrule *ringrule;               /*!< Rule for matching RING request */
 110         int initiator;                   /*!< If we're the initiator */
 111         int alreadygone;
 112         int capability;
 113         struct ast_codec_pref prefs;
 114         struct gtalk_candidate *theircandidates;
 115         struct gtalk_candidate *ourcandidates;
 116         char cid_num[80];                /*!< Caller ID num */
 117         char cid_name[80];               /*!< Caller ID name */
 118         char exten[80];                  /*!< Called extension */
 119         struct ast_channel *owner;       /*!< Master Channel */
 120         struct ast_rtp *rtp;             /*!< RTP audio session */
 121         struct ast_rtp *vrtp;            /*!< RTP video session */
 122         int jointcapability;             /*!< Supported capability at both ends (codecs ) */
 123         int peercapability;
 124         struct gtalk_pvt *next; /* Next entity */
 125 };
 126
 127 struct gtalk_candidate {
 128         char name[100];
 129         enum gtalk_protocol protocol;
 130         double preference;
 131         char username[100];
 132         char password[100];
 133         enum gtalk_connect_type type;
 134         char network[6];
 135         int generation;
 136         char ip[16];
 137         int port;
 138         int receipt;
 139         struct gtalk_candidate *next;
 140 };
 141
 142 struct gtalk {
 143         ASTOBJ_COMPONENTS(struct gtalk);
 144         struct aji_client *connection;
 145         struct aji_buddy *buddy;
 146         struct gtalk_pvt *p;
 147         struct ast_codec_pref prefs;
 148         int amaflags;                   /*!< AMA Flags */
 149         char user[100];
 150         char context[100];
 151         char accountcode[AST_MAX_ACCOUNT_CODE]; /*!< Account code */
 152         int capability;
 153         ast_group_t callgroup;  /*!< Call group */
 154         ast_group_t pickupgroup;        /*!< Pickup group */
 155         int callingpres;                /*!< Calling presentation */
 156         int allowguest;
 157         char language[MAX_LANGUAGE];    /*!<  Default language for prompts */
 158         char musicclass[MAX_MUSICCLASS];        /*!<  Music on Hold class */
 159 };
 160
 161 struct gtalk_container {
 162         ASTOBJ_CONTAINER_COMPONENTS(struct gtalk);
 163 };
 164
 165 static const char desc[] = "Gtalk Channel";
 166 static const char type[] = "Gtalk";
 167
 168 static int global_capability = AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_GSM | AST_FORMAT_H263;
 169
 170 AST_MUTEX_DEFINE_STATIC(gtalklock); /*!< Protect the interface list (of gtalk_pvt's) */
 171
 172 /* Forward declarations */
 173 static struct ast_channel *gtalk_request(const char *type, int format, void *data, int *cause);
 174 static int gtalk_digit(struct ast_channel *ast, char digit);
 175 static int gtalk_call(struct ast_channel *ast, char *dest, int timeout);
 176 static int gtalk_hangup(struct ast_channel *ast);
 177 static int gtalk_answer(struct ast_channel *ast);
 178 static int gtalk_newcall(struct gtalk *client, ikspak *pak);
 179 static struct ast_frame *gtalk_read(struct ast_channel *ast);
 180 static int gtalk_write(struct ast_channel *ast, struct ast_frame *f);
 181 static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen);
 182 static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
 183 static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen);
 184 static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid);
 185 static int gtalk_do_reload(int fd, int argc, char **argv);
 186 static int gtalk_show_channels(int fd, int argc, char **argv);
 187 /*----- RTP interface functions */
 188 static int gtalk_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp,
 189                                                            struct ast_rtp *vrtp, int codecs, int nat_active);
 190 static enum ast_rtp_get_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp);
 191 static int gtalk_get_codec(struct ast_channel *chan);
 192
 193 /*! \brief PBX interface structure for channel registration */
 194 static const struct ast_channel_tech gtalk_tech = {
 195         .type = type,
 196         .description = "Gtalk Channel Driver",
 197         .capabilities = ((AST_FORMAT_MAX_AUDIO << 1) - 1),
 198         .requester = gtalk_request,
 199         .send_digit_begin = gtalk_digit,
 200         .send_digit_end = gtalk_digit,
 201         .bridge = ast_rtp_bridge,
 202         .call = gtalk_call,
 203         .hangup = gtalk_hangup,
 204         .answer = gtalk_answer,
 205         .read = gtalk_read,
 206         .write = gtalk_write,
 207         .exception = gtalk_read,
 208         .indicate = gtalk_indicate,
 209         .fixup = gtalk_fixup,
 210         .send_html = gtalk_sendhtml,
 211         .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER
 212 };
 213
 214 static struct sockaddr_in bindaddr = { 0, };    /*!< The address we bind to */
 215
 216 static struct sched_context *sched;     /*!< The scheduling context */
 217 static struct io_context *io;   /*!< The IO context */
 218 static struct in_addr __ourip;
 219
 220
 221 /*! \brief RTP driver interface */
 222 static struct ast_rtp_protocol gtalk_rtp = {
 223         type: "gtalk",
 224         get_rtp_info: gtalk_get_rtp_peer,
 225         set_rtp_peer: gtalk_set_rtp_peer,
 226         get_codec: gtalk_get_codec,
 227 };
 228
 229 static char debug_usage[] =
 230 "Usage: gtalk show channels\n"
 231 "       Shows current state of the Gtalk channels.\n";
 232
 233 static char reload_usage[] =
 234 "Usage: gtalk reload\n"
 235 "       Reload gtalk channel driver.\n";
 236
 237
 238 static struct ast_cli_entry gtalk_cli[] = {
 239         {{ "gtalk", "reload", NULL}, gtalk_do_reload, "Enable Jabber debugging", reload_usage },
 240         {{ "gtalk", "show", "channels", NULL}, gtalk_show_channels, "Show GoogleTalk Channels", debug_usage },
 241  };
 242
 243
 244
 245 static char externip[16];
 246
 247 static struct gtalk_container gtalk_list;
 248
 249 static void gtalk_member_destroy(struct gtalk *obj)
 250 {
 251         free(obj);
 252 }
 253
 254 static struct gtalk *find_gtalk(char *name, char *connection)
 255 {
 256         struct gtalk *gtalk = NULL;
 257         char *domain = NULL , *s = NULL;
 258         if(strchr(connection, '@')) {
 259                 s = ast_strdupa((char *) connection);
 260                 domain = strsep(&s, "@");
 261                 ast_verbose("OOOOH domain = %s\n", domain);
 262                 free(s);
 263         }
 264         gtalk = ASTOBJ_CONTAINER_FIND(&gtalk_list, name);
 265         if (!gtalk && strchr(name, '@'))
 266                 gtalk = ASTOBJ_CONTAINER_FIND_FULL(&gtalk_list, name, user,,, strcasecmp);
 267
 268         if (!gtalk) {                           /* guest call */
 269                 ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
 270                         ASTOBJ_WRLOCK(iterator);
 271                         if (!strcasecmp(iterator->name, "guest")) {
 272                                 if (!strcasecmp(iterator->connection->jid->partial, connection)) {
 273                                         gtalk = iterator;
 274                                         break;
 275                                 } else if (!strcasecmp(iterator->connection->name, connection)) {
 276                                         gtalk = iterator;
 277                                         break;
 278                                 } else if (iterator->connection->component && !strcasecmp(iterator->connection->user,domain)) {
 279                                         gtalk = iterator;
 280                                         break;
 281                                 }
 282                         }
 283                         ASTOBJ_UNLOCK(iterator);
 284                 });
 285
 286         }
 287         return gtalk;
 288 }
 289
 290
 291 static int add_codec_to_answer(const struct gtalk_pvt *p, int codec, iks *dcodecs)
 292 {
 293         char *format = ast_getformatname(codec);
 294
 295         if (!strcasecmp("ulaw", format)) {
 296                 iks *payload_eg711u, *payload_pcmu;
 297                 payload_pcmu = iks_new("payload-type");
 298                 payload_eg711u = iks_new("payload-type");
 299
 300                 if(!payload_eg711u || !payload_pcmu) {
 301                         if(payload_pcmu)
 302                                 iks_delete(payload_pcmu);
 303                         if(payload_eg711u)
 304                                 iks_delete(payload_eg711u);
 305                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 306                         return -1;
 307                 }
 308                 iks_insert_attrib(payload_pcmu, "id", "0");
 309                 iks_insert_attrib(payload_pcmu, "name", "PCMU");
 310                 iks_insert_attrib(payload_pcmu, "clockrate","8000");
 311                 iks_insert_attrib(payload_pcmu, "bitrate","64000");
 312                 iks_insert_attrib(payload_eg711u, "id", "100");
 313                 iks_insert_attrib(payload_eg711u, "name", "EG711U");
 314                 iks_insert_attrib(payload_eg711u, "clockrate","8000");
 315                 iks_insert_attrib(payload_eg711u, "bitrate","64000");
 316                 iks_insert_node(dcodecs, payload_pcmu);
 317                 iks_insert_node(dcodecs, payload_eg711u);
 318         }
 319         if (!strcasecmp("alaw", format)) {
 320                 iks *payload_eg711a, *payload_pcma;
 321                 payload_pcma = iks_new("payload-type");
 322                 payload_eg711a = iks_new("payload-type");
 323                 if(!payload_eg711a || !payload_pcma) {
 324                         if(payload_eg711a)
 325                                 iks_delete(payload_eg711a);
 326                         if(payload_pcma)
 327                                 iks_delete(payload_pcma);
 328                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 329                         return -1;
 330                 }
 331                 iks_insert_attrib(payload_pcma, "id", "8");
 332                 iks_insert_attrib(payload_pcma, "name", "PCMA");
 333                 iks_insert_attrib(payload_pcma, "clockrate","8000");
 334                 iks_insert_attrib(payload_pcma, "bitrate","64000");
 335                 payload_eg711a = iks_new("payload-type");
 336                 iks_insert_attrib(payload_eg711a, "id", "101");
 337                 iks_insert_attrib(payload_eg711a, "name", "EG711A");
 338                 iks_insert_attrib(payload_eg711a, "clockrate","8000");
 339                 iks_insert_attrib(payload_eg711a, "bitrate","64000");
 340                 iks_insert_node(dcodecs, payload_pcma);
 341                 iks_insert_node(dcodecs, payload_eg711a);
 342         }
 343         if (!strcasecmp("ilbc", format)) {
 344                 iks *payload_ilbc = iks_new("payload-type");
 345                 if(!payload_ilbc) {
 346                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 347                         return -1;
 348                 }
 349                 iks_insert_attrib(payload_ilbc, "id", "102");
 350                 iks_insert_attrib(payload_ilbc, "name", "iLBC");
 351                 iks_insert_attrib(payload_ilbc, "clockrate","8000");
 352                 iks_insert_attrib(payload_ilbc, "bitrate","13300");
 353                 iks_insert_node(dcodecs, payload_ilbc);
 354         }
 355         if (!strcasecmp("g723", format)) {
 356                 iks *payload_g723 = iks_new("payload-type");
 357                 if(!payload_g723) {
 358                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 359                         return -1;
 360                 }
 361                 iks_insert_attrib(payload_g723, "id", "4");
 362                 iks_insert_attrib(payload_g723, "name", "G723");
 363                 iks_insert_attrib(payload_g723, "clockrate","8000");
 364                 iks_insert_attrib(payload_g723, "bitrate","6300");
 365                 iks_insert_node(dcodecs, payload_g723);
 366         }
 367         if (!strcasecmp("speex", format)) {
 368                 iks *payload_speex = iks_new("payload-type");
 369                 if(!payload_speex) {
 370                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 371                         return -1;
 372                 }
 373                 iks_insert_attrib(payload_speex, "id", "98");
 374                 iks_insert_attrib(payload_speex, "name", "speex");
 375                 iks_insert_attrib(payload_speex, "clockrate","8000");
 376                 iks_insert_attrib(payload_speex, "bitrate","11000");
 377                 iks_insert_node(dcodecs, payload_speex);
 378         }
 379         ast_rtp_lookup_code(p->rtp, 1, codec);
 380         return 0;
 381 }
 382
 383 static int gtalk_invite(struct gtalk_pvt *p, char *to, char *from, char *sid, int initiator)
 384 {
 385         struct gtalk *client = p->parent;
 386         iks *iq, *gtalk, *dcodecs, *payload_telephone, *transport;
 387         int x;
 388         int pref_codec = 0;
 389         int alreadysent = 0;
 390
 391
 392         iq = iks_new("iq");
 393         gtalk = iks_new("session");
 394         dcodecs = iks_new("description");
 395         transport = iks_new("transport");
 396         payload_telephone = iks_new("payload-type");
 397         if (!(iq && gtalk && dcodecs && transport && payload_telephone)){
 398                 if(iq)
 399                         iks_delete(iq);
 400                 if(gtalk)
 401                         iks_delete(gtalk);
 402                 if(dcodecs)
 403                         iks_delete(dcodecs);
 404                 if(transport)
 405                         iks_delete(transport);
 406                 if(payload_telephone)
 407                         iks_delete(payload_telephone);
 408
 409                 ast_log(LOG_ERROR, "Could not allocate iksemel nodes\n");
 410                 return 0;
 411         }
 412         iks_insert_attrib(dcodecs, "xmlns", "http://www.google.com/session/phone");
 413         iks_insert_attrib(dcodecs, "xml:lang", "en");
 414
 415         for (x = 0; x < 32; x++) {
 416                 if (!(pref_codec = ast_codec_pref_index(&client->prefs, x)))
 417                         break;
 418                 if (!(client->capability & pref_codec))
 419                         continue;
 420                 if (alreadysent & pref_codec)
 421                         continue;
 422                 add_codec_to_answer(p, pref_codec, dcodecs);
 423                 alreadysent |= pref_codec;
 424         }
 425
 426         iks_insert_attrib(payload_telephone, "id", "106");
 427         iks_insert_attrib(payload_telephone, "name", "telephone-event");
 428         iks_insert_attrib(payload_telephone, "clockrate", "8000");
 429
 430         iks_insert_attrib(transport,"xmlns","http://www.google.com/transport/p2p");
 431
 432         iks_insert_attrib(iq, "type", "set");
 433         iks_insert_attrib(iq, "to", to);
 434         iks_insert_attrib(iq, "from", from);
 435         iks_insert_attrib(iq, "id", client->connection->mid);
 436         ast_aji_increment_mid(client->connection->mid);
 437
 438         iks_insert_attrib(gtalk, "xmlns", "http://www.google.com/session");
 439         iks_insert_attrib(gtalk, "type",initiator ? "initiate": "accept");
 440         iks_insert_attrib(gtalk, "initiator", initiator ? from : to);
 441         iks_insert_attrib(gtalk, "id", sid);
 442         iks_insert_node(iq, gtalk);
 443         iks_insert_node(gtalk, dcodecs);
 444         iks_insert_node(gtalk, transport);
 445         iks_insert_node(dcodecs, payload_telephone);
 446
 447         iks_send(client->connection->p, iq);
 448         iks_delete(payload_telephone);
 449         iks_delete(transport);
 450         iks_delete(dcodecs);
 451         iks_delete(gtalk);
 452         iks_delete(iq);
 453         return 1;
 454 }
 455
 456 static int gtalk_invite_response(struct gtalk_pvt *p, char *to , char *from, char *sid, int initiator)
 457 {
 458         iks *iq, *session, *transport;
 459         iq = iks_new("iq");
 460         session = iks_new("session");
 461         transport = iks_new("transport");
 462         if(!(iq && session && transport)) {
 463                 if(iq)
 464                         iks_delete(iq);
 465                 if(session)
 466                         iks_delete(session);
 467                 if(transport)
 468                         iks_delete(transport);
 469                 ast_log(LOG_ERROR, " Unable to allocate IKS node\n");
 470                 return -1;
 471         }
 472         iks_insert_attrib(iq, "from", from);
 473         iks_insert_attrib(iq, "to", to);
 474         iks_insert_attrib(iq, "type", "set");
 475         iks_insert_attrib(iq, "id",p->parent->connection->mid);
 476         ast_aji_increment_mid(p->parent->connection->mid);
 477         iks_insert_attrib(session, "type", "transport-accept");
 478         iks_insert_attrib(session, "id", sid);
 479         iks_insert_attrib(session, "initiator", initiator ? from : to);
 480         iks_insert_attrib(session, "xmlns", "http://www.google.com/session");
 481         iks_insert_attrib(transport, "xmlns", "http://www.google.com/transport/p2p");
 482         iks_insert_node(iq,session);
 483         iks_insert_node(session,transport);
 484         iks_send(p->parent->connection->p, iq);
 485         iks_delete(transport);
 486         iks_delete(session);
 487         iks_delete(iq);
 488         return 1;
 489
 490 }
 491
 492 static int gtalk_ringing_ack(void *data, ikspak *pak)
 493 {
 494         struct gtalk_pvt *p = data;
 495
 496         if (p->ringrule)
 497                 iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
 498         p->ringrule = NULL;
 499         if (p->owner)
 500                 ast_queue_control(p->owner, AST_CONTROL_RINGING);
 501         return IKS_FILTER_EAT;
 502 }
 503
 504 static int gtalk_answer(struct ast_channel *ast)
 505 {
 506         struct gtalk_pvt *p = ast->tech_pvt;
 507         int res = 0;
 508
 509         if (option_debug)
 510                 ast_log(LOG_DEBUG, "Answer!\n");
 511         ast_mutex_lock(&p->lock);
 512         gtalk_invite(p, p->them, p->us,p->sid, 0);
 513         ast_mutex_unlock(&p->lock);
 514         return res;
 515 }
 516
 517 static enum ast_rtp_get_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp)
 518 {
 519         struct gtalk_pvt *p = chan->tech_pvt;
 520         enum ast_rtp_get_result res = AST_RTP_GET_FAILED;
 521
 522         if (!p)
 523                 return res;
 524
 525         ast_mutex_lock(&p->lock);
 526         if (p->rtp){
 527                 *rtp = p->rtp;
 528                 res = AST_RTP_TRY_NATIVE;
 529         }
 530         ast_mutex_unlock(&p->lock);
 531
 532         return res;
 533 }
 534
 535 static int gtalk_get_codec(struct ast_channel *chan)
 536 {
 537         struct gtalk_pvt *p = chan->tech_pvt;
 538         return p->peercapability;
 539 }
 540
 541 static int gtalk_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp, int codecs, int nat_active)
 542 {
 543         struct gtalk_pvt *p;
 544
 545         p = chan->tech_pvt;
 546         if (!p)
 547                 return -1;
 548         ast_mutex_lock(&p->lock);
 549
 550 /*      if (rtp)
 551                 ast_rtp_get_peer(rtp, &p->redirip);
 552         else
 553                 memset(&p->redirip, 0, sizeof(p->redirip));
 554         p->redircodecs = codecs; */
 555
 556         /* Reset lastrtprx timer */
 557         ast_mutex_unlock(&p->lock);
 558         return 0;
 559 }
 560
 561 static int gtalk_response(struct gtalk *client, char *from, ikspak *pak, const char *reasonstr, const char *reasonstr2)
 562 {
 563         iks *response = NULL, *error = NULL, *reason = NULL;
 564         int res = -1;
 565
 566         response = iks_new("iq");
 567         if (response) {
 568                 iks_insert_attrib(response, "type", "result");
 569                 iks_insert_attrib(response, "from", from);
 570                 iks_insert_attrib(response, "to", iks_find_attrib(pak->x, "from"));
 571                 iks_insert_attrib(response, "id", iks_find_attrib(pak->x, "id"));
 572                 if (reasonstr) {
 573                         error = iks_new("error");
 574                         if (error) {
 575                                 iks_insert_attrib(error, "type", "cancel");
 576                                 reason = iks_new(reasonstr);
 577                                 if (reason)
 578                                         iks_insert_node(error, reason);
 579                                 iks_insert_node(response, error);
 580                         }
 581                 }
 582                 iks_send(client->connection->p, response);
 583                 if (reason)
 584                         iks_delete(reason);
 585                 if (error)
 586                         iks_delete(error);
 587                 iks_delete(response);
 588                 res = 0;
 589         }
 590         return res;
 591 }
 592
 593 static int gtalk_is_answered(struct gtalk *client, ikspak *pak)
 594 {
 595         struct gtalk_pvt *tmp;
 596         char *from;
 597         if (option_debug)
 598                 ast_log(LOG_DEBUG, "The client is %s\n", client->name);
 599         /* Make sure our new call doesn't exist yet */
 600         for (tmp = client->p; tmp; tmp = tmp->next) {
 601                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
 602                         break;
 603         }
 604
 605         from = iks_find_attrib(pak->x, "to");
 606         if(!from)
 607                 from = client->connection->jid->full;
 608
 609         if (tmp) {
 610                 if (tmp->owner)
 611                         ast_queue_control(tmp->owner, AST_CONTROL_ANSWER);
 612         } else
 613                 ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
 614         gtalk_response(client, from, pak, NULL, NULL);
 615         return 1;
 616 }
 617
 618 static int gtalk_handle_dtmf(struct gtalk *client, ikspak *pak)
 619 {
 620         struct gtalk_pvt *tmp;
 621         iks *dtmfnode = NULL;
 622         char *dtmf;
 623         char *from;
 624         /* Make sure our new call doesn't exist yet */
 625         for (tmp = client->p; tmp; tmp = tmp->next) {
 626                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
 627                         break;
 628         }
 629         from = iks_find_attrib(pak->x, "to");
 630         if(!from)
 631                 from = client->connection->jid->full;
 632
 633
 634         if (tmp) {
 635                 if(iks_find_with_attrib(pak->x, "dtmf-method", "method", "rtp")) {
 636                         gtalk_response(client, from, pak,
 637                                         "feature-not-implemented xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'",
 638                                         "unsupported-dtmf-method xmlns='http://jabber.org/protocol/gtalk/info/dtmf#errors'");
 639                         return -1;
 640                 }
 641                 if ((dtmfnode = iks_find(pak->x, "dtmf"))) {
 642                         if((dtmf = iks_find_attrib(dtmfnode, "code"))) {
 643                                 if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-up")) {
 644                                         struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
 645                                         f.subclass = dtmf[0];
 646                                         ast_queue_frame(tmp->owner, &f);
 647                                         ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
 648                                 } else if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-down")) {
 649                                         struct ast_frame f = {AST_FRAME_DTMF_END, };
 650                                         f.subclass = dtmf[0];
 651                                         ast_queue_frame(tmp->owner, &f);
 652                                         ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
 653                                 } else if(iks_find_attrib(pak->x, "dtmf")) { /* 250 millasecond default */
 654                                         struct ast_frame f = {AST_FRAME_DTMF, };
 655                                         f.subclass = dtmf[0];
 656                                         ast_queue_frame(tmp->owner, &f);
 657                                         ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
 658                                 }
 659                         }
 660                 }
 661                 gtalk_response(client, from, pak, NULL, NULL);
 662                 return 1;
 663         } else
 664                 ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
 665
 666         gtalk_response(client, from, pak, NULL, NULL);
 667         return 1;
 668 }
 669
 670
 671 static int gtalk_hangup_farend(struct gtalk *client, ikspak *pak)
 672 {
 673         struct gtalk_pvt *tmp;
 674         char *from;
 675
 676         if (option_debug)
 677                 ast_log(LOG_DEBUG, "The client is %s\n", client->name);
 678         /* Make sure our new call doesn't exist yet */
 679         for (tmp = client->p; tmp; tmp = tmp->next) {
 680                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
 681                         break;
 682         }
 683         from = iks_find_attrib(pak->x, "to");
 684         if(!from)
 685                 from = client->connection->jid->full;
 686
 687
 688         if (tmp) {
 689                 tmp->alreadygone = 1;
 690                 ast_queue_hangup(tmp->owner);
 691         } else
 692                 ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
 693         gtalk_response(client, from, pak, NULL, NULL);
 694         return 1;
 695 }
 696
 697 static int gtalk_create_candidates(struct gtalk *client, struct gtalk_pvt *p, char *sid, char *from, char *to)
 698 {
 699         struct gtalk_candidate *tmp;
 700         struct aji_client *c = client->connection;
 701         struct gtalk_candidate *ours1 = NULL, *ours2 = NULL;
 702         struct sockaddr_in sin;
 703         struct sockaddr_in dest;
 704         struct in_addr us;
 705         iks *iq, *gtalk, *candidate, *transport;
 706         char user[17], pass[17], preference[5], port[7];
 707
 708
 709         iq = iks_new("iq");
 710         gtalk = iks_new("session");
 711         candidate = iks_new("candidate");
 712         transport = iks_new("transport");
 713         if (!iq || !gtalk || !candidate || !transport) {
 714                 ast_log(LOG_ERROR, "Memory allocation error\n");
 715                 goto safeout;
 716         }
 717         ours1 = ast_calloc(1, sizeof(*ours1));
 718         ours2 = ast_calloc(1, sizeof(*ours2));
 719         if (!ours1 || !ours2)
 720                 goto safeout;
 721
 722         iks_insert_attrib(transport, "xmlns","http://www.google.com/transport/p2p");
 723         iks_insert_node(iq, gtalk);
 724         iks_insert_node(gtalk,transport);
 725         iks_insert_node(transport, candidate);
 726
 727         for (; p; p = p->next) {
 728                 if (!strcasecmp(p->sid, sid))
 729                         break;
 730         }
 731
 732         if (!p) {
 733                 ast_log(LOG_NOTICE, "No matching gtalk session - SID %s!\n", sid);
 734                 goto safeout;
 735         }
 736
 737         ast_rtp_get_us(p->rtp, &sin);
 738         ast_find_ourip(&us, bindaddr);
 739
 740         /* Setup our gtalk candidates */
 741         ast_copy_string(ours1->name, "rtp", sizeof(ours1->name));
 742         ours1->port = ntohs(sin.sin_port);
 743         ours1->preference = 1;
 744         snprintf(user, sizeof(user), "%08lx%08lx", ast_random(), ast_random());
 745         snprintf(pass, sizeof(pass), "%08lx%08lx", ast_random(), ast_random());
 746         ast_copy_string(ours1->username, user, sizeof(ours1->username));
 747         ast_copy_string(ours1->password, pass, sizeof(ours1->password));
 748         ast_copy_string(ours1->ip, ast_inet_ntoa(us), sizeof(ours1->ip));
 749         ours1->protocol = AJI_PROTOCOL_UDP;
 750         ours1->type = AJI_CONNECT_LOCAL;
 751         ours1->generation = 0;
 752         p->ourcandidates = ours1;
 753
 754         if (!ast_strlen_zero(externip)) {
 755                 /* XXX We should really stun for this one not just go with externip XXX */
 756                 snprintf(user, sizeof(user), "%08lx%08lx", ast_random(), ast_random());
 757                 snprintf(pass, sizeof(pass), "%08lx%08lx", ast_random(), ast_random());
 758                 ast_copy_string(ours2->username, user, sizeof(ours2->username));
 759                 ast_copy_string(ours2->password, pass, sizeof(ours2->password));
 760                 ast_copy_string(ours2->ip, externip, sizeof(ours2->ip));
 761                 ast_copy_string(ours2->name, "rtp", sizeof(ours1->name));
 762                 ours2->port = ntohs(sin.sin_port);
 763                 ours2->preference = 0.9;
 764                 ours2->protocol = AJI_PROTOCOL_UDP;
 765                 ours2->type = AJI_CONNECT_STUN;
 766                 ours2->generation = 0;
 767                 ours1->next = ours2;
 768                 ours2 = NULL;
 769         }
 770         ours1 = NULL;
 771         dest.sin_addr = __ourip;
 772         dest.sin_port = sin.sin_port;
 773
 774
 775         for (tmp = p->ourcandidates; tmp; tmp = tmp->next) {
 776                 snprintf(port, sizeof(port), "%d", tmp->port);
 777                 snprintf(preference, sizeof(preference), "%.2f", tmp->preference);
 778                 iks_insert_attrib(iq, "from", to);
 779                 iks_insert_attrib(iq, "to", from);
 780                 iks_insert_attrib(iq, "type", "set");
 781                 iks_insert_attrib(iq, "id", c->mid);
 782                 ast_aji_increment_mid(c->mid);
 783                 iks_insert_attrib(gtalk, "type", "transport-info");
 784                 iks_insert_attrib(gtalk, "id", sid);
 785                 iks_insert_attrib(gtalk, "initiator", (p->initiator) ? to : from);
 786                 iks_insert_attrib(gtalk, "xmlns", GOOGLE_NS);
 787                 iks_insert_attrib(candidate, "name", tmp->name);
 788                 iks_insert_attrib(candidate, "address", tmp->ip);
 789                 iks_insert_attrib(candidate, "port", port);
 790                 iks_insert_attrib(candidate, "username", tmp->username);
 791                 iks_insert_attrib(candidate, "password", tmp->password);
 792                 iks_insert_attrib(candidate, "preference", preference);
 793                 if (tmp->protocol == AJI_PROTOCOL_UDP)
 794                         iks_insert_attrib(candidate, "protocol", "udp");
 795                 if (tmp->protocol == AJI_PROTOCOL_SSLTCP)
 796                         iks_insert_attrib(candidate, "protocol", "ssltcp");
 797                 if (tmp->type == AJI_CONNECT_STUN)
 798                         iks_insert_attrib(candidate, "type", "stun");
 799                 if (tmp->type == AJI_CONNECT_LOCAL)
 800                         iks_insert_attrib(candidate, "type", "local");
 801                 if (tmp->type == AJI_CONNECT_RELAY)
 802                         iks_insert_attrib(candidate, "type", "relay");
 803                 iks_insert_attrib(candidate, "network", "0");
 804                 iks_insert_attrib(candidate, "generation", "0");
 805                 iks_send(c->p, iq);
 806         }
 807         p->laststun = 0;
 808
 809 safeout:
 810         if (ours1)
 811                 free(ours1);
 812         if (ours2)
 813                 free(ours2);
 814         if (iq)
 815                 iks_delete(iq);
 816         if (gtalk)
 817                 iks_delete(gtalk);
 818         if (candidate)
 819                 iks_delete(candidate);
 820         if(transport)
 821                 iks_delete(transport);
 822         return 1;
 823 }
 824
 825 static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid)
 826 {
 827         struct gtalk_pvt *tmp = NULL;
 828         struct aji_resource *resources = NULL;
 829         struct aji_buddy *buddy;
 830         char idroster[200];
 831         char *data, *exten = NULL;
 832
 833         if (option_debug)
 834                 ast_log(LOG_DEBUG, "The client is %s for alloc\n", client->name);
 835         if (!sid && !strchr(them, '/')) {       /* I started call! */
 836                 if (!strcasecmp(client->name, "guest")) {
 837                         buddy = ASTOBJ_CONTAINER_FIND(&client->connection->buddies, them);
 838                         if (buddy)
 839                                 resources = buddy->resources;
 840                 } else
 841                         resources = client->buddy->resources;
 842                 while (resources) {
 843                         if (resources->cap->jingle) {
 844                                 break;
 845                         }
 846                         resources = resources->next;
 847                 }
 848                 if (resources)
 849                         snprintf(idroster, sizeof(idroster), "%s/%s", them, resources->resource);
 850                 else {
 851                         ast_log(LOG_ERROR, "no gtalk capable clients to talk to.\n");
 852                         return NULL;
 853                 }
 854         }
 855         if (!(tmp = ast_calloc(1, sizeof(*tmp)))) {
 856                 return NULL;
 857         }
 858         if (sid) {
 859                 ast_copy_string(tmp->sid, sid, sizeof(tmp->sid));
 860                 ast_copy_string(tmp->them, them, sizeof(tmp->them));
 861                 ast_copy_string(tmp->us, us, sizeof(tmp->us));
 862         } else {
 863                 snprintf(tmp->sid, sizeof(tmp->sid), "%08lx%08lx", ast_random(), ast_random());
 864                 ast_copy_string(tmp->them, idroster, sizeof(tmp->them));
 865                 ast_copy_string(tmp->us, us, sizeof(tmp->us));
 866                 tmp->initiator = 1;
 867         }
 868         tmp->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, bindaddr.sin_addr);
 869         tmp->parent = client;
 870         if (!tmp->rtp) {
 871                 ast_log(LOG_WARNING, "Out of RTP sessions?\n");
 872                 free(tmp);
 873                 return NULL;
 874         }
 875
 876         if(strchr(tmp->us, '/')) {
 877                 data = ast_strdupa((char *) tmp->us);
 878                 exten = strsep(&data, "/");
 879         } else
 880                 exten = tmp->us;
 881         ast_copy_string(tmp->exten,  exten, sizeof(tmp->exten));
 882         if(data)
 883                 free(data);
 884         ast_mutex_init(&tmp->lock);
 885         ast_mutex_lock(&gtalklock);
 886         tmp->next = client->p;
 887         client->p = tmp;
 888         ast_mutex_unlock(&gtalklock);
 889         return tmp;
 890 }
 891
 892 /*! \brief Start new gtalk channel */
 893 static struct ast_channel *gtalk_new(struct gtalk *client, struct gtalk_pvt *i, int state, const char *title)
 894 {
 895         struct ast_channel *tmp;
 896         int fmt;
 897         int what;
 898         char *n2;
 899
 900         if (title)
 901                 n2 = title;
 902         else
 903                 n2 = i->us;
 904         tmp = ast_channel_alloc(1, state, i->cid_num, i->cid_name, "Gtalk/%s-%04lx", n2, ast_random() & 0xffff);
 905         if (!tmp) {
 906                 ast_log(LOG_WARNING, "Unable to allocate Gtalk channel structure!\n");
 907                 return NULL;
 908         }
 909         tmp->tech = &gtalk_tech;
 910
 911         /* Select our native format based on codec preference until we receive
 912            something from another device to the contrary. */
 913 /*      ast_verbose("XXXXXXXXXXXXX\nXXX i->jointcapability = %X\nXXX i->capability = %X\nXXX global_capability %X\n XXXXXXXXXXXX\n",i->jointcapability,i->capability,global_capability); */
 914         if (i->jointcapability)
 915                 what = i->jointcapability;
 916         else if (i->capability)
 917                 what = i->capability;
 918         else
 919                 what = global_capability;
 920         tmp->nativeformats = ast_codec_choose(&i->prefs, what, 1) | (i->jointcapability & AST_FORMAT_VIDEO_MASK);
 921         fmt = ast_best_codec(tmp->nativeformats);
 922
 923         if (i->rtp) {
 924                 tmp->fds[0] = ast_rtp_fd(i->rtp);
 925                 tmp->fds[1] = ast_rtcp_fd(i->rtp);
 926         }
 927         if (i->vrtp) {
 928                 tmp->fds[2] = ast_rtp_fd(i->vrtp);
 929                 tmp->fds[3] = ast_rtcp_fd(i->vrtp);
 930         }
 931         if (state == AST_STATE_RING)
 932                 tmp->rings = 1;
 933         tmp->adsicpe = AST_ADSI_UNAVAILABLE;
 934         tmp->writeformat = fmt;
 935         tmp->rawwriteformat = fmt;
 936         tmp->readformat = fmt;
 937         tmp->rawreadformat = fmt;
 938         tmp->tech_pvt = i;
 939
 940         tmp->callgroup = client->callgroup;
 941         tmp->pickupgroup = client->pickupgroup;
 942         tmp->cid.cid_pres = client->callingpres;
 943         if (!ast_strlen_zero(client->accountcode))
 944                 ast_string_field_set(tmp, accountcode, client->accountcode);
 945         if (client->amaflags)
 946                 tmp->amaflags = client->amaflags;
 947         if (!ast_strlen_zero(client->language))
 948                 ast_string_field_set(tmp, language, client->language);
 949         if (!ast_strlen_zero(client->musicclass))
 950                 ast_string_field_set(tmp, musicclass, client->musicclass);
 951         i->owner = tmp;
 952         ast_copy_string(tmp->context, client->context, sizeof(tmp->context));
 953         ast_copy_string(tmp->exten, i->exten, sizeof(tmp->exten));
 954         /* Don't use ast_set_callerid() here because it will
 955          * generate a needless NewCallerID event */
 956         tmp->cid.cid_num = ast_strdup(l->cid_num);
 957         tmp->cid.cid_ani = ast_strdup(l->cid_num);
 958         tmp->cid.cid_name = ast_strdup(l->cid_name);
 959         if (!ast_strlen_zero(i->exten) && strcmp(i->exten, "s"))
 960                 tmp->cid.cid_dnid = ast_strdup(i->exten);
 961         tmp->priority = 1;
 962         if (i->rtp)
 963                 ast_jb_configure(tmp, &global_jbconf);
 964         if (state != AST_STATE_DOWN && ast_pbx_start(tmp)) {
 965                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
 966                 tmp->hangupcause = AST_CAUSE_SWITCH_CONGESTION;
 967                 ast_hangup(tmp);
 968                 tmp = NULL;
 969         }
 970
 971         return tmp;
 972 }
 973
 974 static int gtalk_action(struct gtalk *client, struct gtalk_pvt *p, const char *action)
 975 {
 976         iks *request, *session = NULL;
 977         int res = -1;
 978
 979         request = iks_new("iq");
 980         if (request) {
 981                 iks_insert_attrib(request, "type", "set");
 982                 iks_insert_attrib(request, "from", p->us);
 983                 iks_insert_attrib(request, "to", p->them);
 984                 iks_insert_attrib(request, "id", client->connection->mid);
 985                 ast_aji_increment_mid(client->connection->mid);
 986                 session = iks_new("session");
 987                 if (session) {
 988                         iks_insert_attrib(session, "type", action);
 989                         iks_insert_attrib(session, "id", p->sid);
 990                         iks_insert_attrib(session, "initiator", p->initiator ? p->us : p->them);
 991                         iks_insert_attrib(session, "xmlns", "http://www.google.com/session");
 992                         iks_insert_node(request, session);
 993                         iks_send(client->connection->p, request);
 994                         iks_delete(session);
 995                         res = 0;
 996                 }
 997                 iks_delete(request);
 998         }
 999         return res;
1000 }
1001
1002 static void gtalk_free_candidates(struct gtalk_candidate *candidate)
1003 {
1004         struct gtalk_candidate *last;
1005         while (candidate) {
1006                 last = candidate;
1007                 candidate = candidate->next;
1008                 free(last);
1009         }
1010 }
1011
1012 static void gtalk_free_pvt(struct gtalk *client, struct gtalk_pvt *p)
1013 {
1014         struct gtalk_pvt *cur, *prev = NULL;
1015         cur = client->p;
1016         while (cur) {
1017                 if (cur == p) {
1018                         if (prev)
1019                                 prev->next = p->next;
1020                         else
1021                                 client->p = p->next;
1022                         break;
1023                 }
1024                 prev = cur;
1025                 cur = cur->next;
1026         }
1027         if (p->ringrule)
1028                 iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
1029         if (p->owner)
1030                 ast_log(LOG_WARNING, "Uh oh, there's an owner, this is going to be messy.\n");
1031         if (p->rtp)
1032                 ast_rtp_destroy(p->rtp);
1033         if (p->vrtp)
1034                 ast_rtp_destroy(p->vrtp);
1035         gtalk_free_candidates(p->theircandidates);
1036         free(p);
1037 }
1038
1039
1040 static int gtalk_newcall(struct gtalk *client, ikspak *pak)
1041 {
1042         struct gtalk_pvt *p, *tmp = client->p;
1043         struct ast_channel *chan;
1044         int res;
1045         iks *codec;
1046         char *from = NULL;
1047         /* Make sure our new call doesn't exist yet */
1048         from = iks_find_attrib(pak->x,"to");
1049         if(!from)
1050                 from = client->connection->jid->full;
1051
1052         while (tmp) {
1053                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
1054                         ast_log(LOG_NOTICE, "Ignoring duplicate call setup on SID %s\n", tmp->sid);
1055                         gtalk_response(client, from, pak, "out-of-order", NULL);
1056                         return -1;
1057                 }
1058                 tmp = tmp->next;
1059         }
1060
1061         p = gtalk_alloc(client, from, pak->from->full, iks_find_attrib(pak->query, "id"));
1062         if (!p) {
1063                 ast_log(LOG_WARNING, "Unable to allocate gtalk structure!\n");
1064                 return -1;
1065         }
1066         chan = gtalk_new(client, p, AST_STATE_DOWN, pak->from->user);
1067         if (chan) {
1068                 ast_mutex_lock(&p->lock);
1069                 ast_copy_string(p->them, pak->from->full, sizeof(p->them));
1070                 if (iks_find_attrib(pak->query, "id")) {
1071                         ast_copy_string(p->sid, iks_find_attrib(pak->query, "id"),
1072                                                         sizeof(p->sid));
1073                 }
1074
1075                 codec = iks_child(iks_child(iks_child(pak->x)));
1076                 while (codec) {
1077                         ast_rtp_set_m_type(p->rtp, atoi(iks_find_attrib(codec, "id")));
1078                         ast_rtp_set_rtpmap_type(p->rtp, atoi(iks_find_attrib(codec, "id")), "audio",
1079                                                 iks_find_attrib(codec, "name"), 0);
1080                         codec = iks_next(codec);
1081                 }
1082
1083                 ast_mutex_unlock(&p->lock);
1084                 ast_setstate(chan, AST_STATE_RING);
1085                 res = ast_pbx_start(chan);
1086
1087                 switch (res) {
1088                 case AST_PBX_FAILED:
1089                         ast_log(LOG_WARNING, "Failed to start PBX :(\n");
1090                         gtalk_response(client, from, pak, "service-unavailable", NULL);
1091                         break;
1092                 case AST_PBX_CALL_LIMIT:
1093                         ast_log(LOG_WARNING, "Failed to start PBX (call limit reached) \n");
1094                         gtalk_response(client, from, pak, "service-unavailable", NULL);
1095                         break;
1096                 case AST_PBX_SUCCESS:
1097                         gtalk_response(client, from, pak, NULL, NULL);
1098                         gtalk_invite_response(p, p->them, p->us,p->sid, 0);
1099                         gtalk_create_candidates(client, p, p->sid, p->them, p->us);
1100                         /* nothing to do */
1101                         break;
1102                 }
1103         } else {
1104                 gtalk_free_pvt(client, p);
1105         }
1106         return 1;
1107 }
1108
1109 static int gtalk_update_stun(struct gtalk *client, struct gtalk_pvt *p)
1110 {
1111         struct gtalk_candidate *tmp;
1112         struct hostent *hp;
1113         struct ast_hostent ahp;
1114         struct sockaddr_in sin;
1115
1116         if (time(NULL) == p->laststun)
1117                 return 0;
1118
1119         tmp = p->theircandidates;
1120         p->laststun = time(NULL);
1121         while (tmp) {
1122                 char username[256];
1123                 hp = ast_gethostbyname(tmp->ip, &ahp);
1124                 sin.sin_family = AF_INET;
1125                 memcpy(&sin.sin_addr, hp->h_addr, sizeof(sin.sin_addr));
1126                 sin.sin_port = htons(tmp->port);
1127                 snprintf(username, sizeof(username), "%s%s", tmp->username,
1128                                  p->ourcandidates->username);
1129
1130                 ast_rtp_stun_request(p->rtp, &sin, username);
1131                 tmp = tmp->next;
1132         }
1133         return 1;
1134 }
1135
1136 static int gtalk_add_candidate(struct gtalk *client, ikspak *pak)
1137 {
1138         struct gtalk_pvt *p = NULL, *tmp = NULL;
1139         struct aji_client *c = client->connection;
1140         struct gtalk_candidate *newcandidate = NULL;
1141         iks *traversenodes = NULL, *receipt = NULL;
1142         char *from;
1143
1144         from = iks_find_attrib(pak->x,"to");
1145         if(!from)
1146                 from = c->jid->full;
1147
1148         newcandidate = ast_calloc(1, sizeof(*newcandidate));
1149         if (!newcandidate)
1150                 return 0;
1151         for (tmp = client->p; tmp; tmp = tmp->next) {
1152                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
1153                         p = tmp;
1154                         break;
1155                 }
1156         }
1157
1158         if (!p)
1159                 return -1;
1160
1161         traversenodes = pak->query;
1162         while(traversenodes) {
1163                 if(!strcasecmp(iks_name(traversenodes), "session")) {
1164                         traversenodes = iks_child(traversenodes);
1165                         continue;
1166                 }
1167                 if(!strcasecmp(iks_name(traversenodes), "transport")) {
1168                         traversenodes = iks_child(traversenodes);
1169                         continue;
1170                 }
1171                 if(!strcasecmp(iks_name(traversenodes), "candidate")) {
1172                         newcandidate = ast_calloc(1, sizeof(*newcandidate));
1173                         if (!newcandidate)
1174                                 return 0;
1175                         ast_copy_string(newcandidate->name, iks_find_attrib(traversenodes, "name"),
1176                                                         sizeof(newcandidate->name));
1177                         ast_copy_string(newcandidate->ip, iks_find_attrib(traversenodes, "address"),
1178                                                         sizeof(newcandidate->ip));
1179                         newcandidate->port = atoi(iks_find_attrib(traversenodes, "port"));
1180                         ast_copy_string(newcandidate->username, iks_find_attrib(traversenodes, "username"),
1181                                                         sizeof(newcandidate->username));
1182                         ast_copy_string(newcandidate->password, iks_find_attrib(traversenodes, "password"),
1183                                                         sizeof(newcandidate->password));
1184                         newcandidate->preference = atof(iks_find_attrib(traversenodes, "preference"));
1185                         if (!strcasecmp(iks_find_attrib(traversenodes, "protocol"), "udp"))
1186                                 newcandidate->protocol = AJI_PROTOCOL_UDP;
1187                         if (!strcasecmp(iks_find_attrib(traversenodes, "protocol"), "ssltcp"))
1188                                 newcandidate->protocol = AJI_PROTOCOL_SSLTCP;
1189
1190                         if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "stun"))
1191                                 newcandidate->type = AJI_CONNECT_STUN;
1192                         if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "local"))
1193                                 newcandidate->type = AJI_CONNECT_LOCAL;
1194                         if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "relay"))
1195                                 newcandidate->type = AJI_CONNECT_RELAY;
1196                         ast_copy_string(newcandidate->network, iks_find_attrib(traversenodes, "network"),
1197                                                         sizeof(newcandidate->network));
1198                         newcandidate->generation = atoi(iks_find_attrib(traversenodes, "generation"));
1199                         newcandidate->next = NULL;
1200
1201                         newcandidate->next = p->theircandidates;
1202                         p->theircandidates = newcandidate;
1203                         p->laststun = 0;
1204                         gtalk_update_stun(p->parent, p);
1205                         newcandidate = NULL;
1206                 }
1207                 traversenodes = iks_next(traversenodes);
1208         }
1209
1210         receipt = iks_new("iq");
1211         iks_insert_attrib(receipt, "type", "result");
1212         iks_insert_attrib(receipt, "from", from);
1213         iks_insert_attrib(receipt, "to", iks_find_attrib(pak->x, "from"));
1214         iks_insert_attrib(receipt, "id", iks_find_attrib(pak->x, "id"));
1215         iks_send(c->p, receipt);
1216         iks_delete(receipt);
1217
1218         return 1;
1219 }
1220
1221 static struct ast_frame *gtalk_rtp_read(struct ast_channel *ast, struct gtalk_pvt *p)
1222 {
1223         struct ast_frame *f;
1224
1225         if (!p->rtp)
1226                 return &ast_null_frame;
1227         f = ast_rtp_read(p->rtp);
1228         gtalk_update_stun(p->parent, p);
1229         if (p->owner) {
1230                 /* We already hold the channel lock */
1231                 if (f->frametype == AST_FRAME_VOICE) {
1232                         if (f->subclass != (p->owner->nativeformats & AST_FORMAT_AUDIO_MASK)) {
1233                                 if (option_debug)
1234                                         ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
1235                                 p->owner->nativeformats =
1236                                         (p->owner->nativeformats & AST_FORMAT_VIDEO_MASK) | f->subclass;
1237                                 ast_set_read_format(p->owner, p->owner->readformat);
1238                                 ast_set_write_format(p->owner, p->owner->writeformat);
1239                         }
1240 /*                      if ((ast_test_flag(p, SIP_DTMF) == SIP_DTMF_INBAND) && p->vad) {
1241                                 f = ast_dsp_process(p->owner, p->vad, f);
1242                                 if (option_debug && f && (f->frametype == AST_FRAME_DTMF))
1243                                         if (option_debug)
1244                                                 ast_log(LOG_DEBUG, "* Detected inband DTMF '%c'\n", f->subclass);
1245                         } */
1246                 }
1247         }
1248         return f;
1249 }
1250
1251 static struct ast_frame *gtalk_read(struct ast_channel *ast)
1252 {
1253         struct ast_frame *fr;
1254         struct gtalk_pvt *p = ast->tech_pvt;
1255
1256         ast_mutex_lock(&p->lock);
1257         fr = gtalk_rtp_read(ast, p);
1258         ast_mutex_unlock(&p->lock);
1259         return fr;
1260 }
1261
1262 /*! \brief Send frame to media channel (rtp) */
1263 static int gtalk_write(struct ast_channel *ast, struct ast_frame *frame)
1264 {
1265         struct gtalk_pvt *p = ast->tech_pvt;
1266         int res = 0;
1267
1268         switch (frame->frametype) {
1269         case AST_FRAME_VOICE:
1270                 if (!(frame->subclass & ast->nativeformats)) {
1271                         ast_log(LOG_WARNING,
1272                                         "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
1273                                         frame->subclass, ast->nativeformats, ast->readformat,
1274                                         ast->writeformat);
1275                         return 0;
1276                 }
1277                 if (p) {
1278                         ast_mutex_lock(&p->lock);
1279                         if (p->rtp) {
1280                                 res = ast_rtp_write(p->rtp, frame);
1281                         }
1282                         ast_mutex_unlock(&p->lock);
1283                 }
1284                 break;
1285         case AST_FRAME_VIDEO:
1286                 if (p) {
1287                         ast_mutex_lock(&p->lock);
1288                         if (p->vrtp) {
1289                                 res = ast_rtp_write(p->vrtp, frame);
1290                         }
1291                         ast_mutex_unlock(&p->lock);
1292                 }
1293                 break;
1294         case AST_FRAME_IMAGE:
1295                 return 0;
1296                 break;
1297         default:
1298                 ast_log(LOG_WARNING, "Can't send %d type frames with Gtalk write\n",
1299                                 frame->frametype);
1300                 return 0;
1301         }
1302
1303         return res;
1304 }
1305
1306 static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
1307 {
1308         struct gtalk_pvt *p = newchan->tech_pvt;
1309         ast_mutex_lock(&p->lock);
1310
1311         if ((p->owner != oldchan)) {
1312                 ast_mutex_unlock(&p->lock);
1313                 return -1;
1314         }
1315         if (p->owner == oldchan)
1316                 p->owner = newchan;
1317         ast_mutex_unlock(&p->lock);
1318         return 0;
1319 }
1320
1321 static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen)
1322 {
1323         int res = 0;
1324
1325         switch (condition) {
1326         case AST_CONTROL_HOLD:
1327                 ast_moh_start(ast, data, NULL);
1328                 break;
1329         case AST_CONTROL_UNHOLD:
1330                 ast_moh_stop(ast);
1331                 break;
1332         default:
1333                 ast_log(LOG_NOTICE, "Don't know how to indicate condition '%d'\n", condition);
1334                 res = -1;
1335         }
1336
1337         return res;
1338 }
1339
1340 static int gtalk_digit(struct ast_channel *ast, char digit)
1341 {
1342         struct gtalk_pvt *p = ast->tech_pvt;
1343         struct gtalk *client = p->parent;
1344         iks *iq, *gtalk, *dtmf;
1345         char buffer[2] = {digit, '\0'};
1346         iq = iks_new("iq");
1347         gtalk = iks_new("gtalk");
1348         dtmf = iks_new("dtmf");
1349         if(!iq || !gtalk || !dtmf) {
1350                 if(iq)
1351                         iks_delete(iq);
1352                 if(gtalk)
1353                         iks_delete(gtalk);
1354                 if(dtmf)
1355                         iks_delete(dtmf);
1356                 ast_log(LOG_ERROR, "Did not send dtmf do to memory issue\n");
1357                 return -1;
1358         }
1359
1360         iks_insert_attrib(iq, "type", "set");
1361         iks_insert_attrib(iq, "to", p->them);
1362         iks_insert_attrib(iq, "from", p->us);
1363         iks_insert_attrib(iq, "id", client->connection->mid);
1364         ast_aji_increment_mid(client->connection->mid);
1365         iks_insert_attrib(gtalk, "xmlns", "http://jabber.org/protocol/gtalk");
1366         iks_insert_attrib(gtalk, "action", "content-info");
1367         iks_insert_attrib(gtalk, "initiator", p->initiator ? p->us: p->them);
1368         iks_insert_attrib(gtalk, "sid", p->sid);
1369         iks_insert_attrib(dtmf, "xmlns", "http://jabber.org/protocol/gtalk/info/dtmf");
1370         iks_insert_attrib(dtmf, "code", buffer);
1371         iks_insert_node(iq, gtalk);
1372         iks_insert_node(gtalk, dtmf);
1373
1374         ast_mutex_lock(&p->lock);
1375         if(ast->dtmff.frametype == AST_FRAME_DTMF) {
1376                 ast_verbose("Sending 250ms dtmf!\n");
1377         } else if (ast->dtmff.frametype == AST_FRAME_DTMF_BEGIN) {
1378                 iks_insert_attrib(dtmf, "action", "button-down");
1379         } else if (ast->dtmff.frametype == AST_FRAME_DTMF_END) {
1380                 iks_insert_attrib(dtmf, "action", "button-up");
1381         }
1382         iks_send(client->connection->p, iq);
1383         iks_delete(iq);
1384         iks_delete(gtalk);
1385         iks_delete(dtmf);
1386         ast_mutex_unlock(&p->lock);
1387         return 0;
1388 }
1389
1390 static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen)
1391 {
1392         ast_log(LOG_NOTICE, "XXX Implement gtalk sendhtml XXX\n");
1393
1394         return -1;
1395 }
1396
1397 /* Not in use right now.
1398 static int gtalk_auto_congest(void *nothing)
1399 {
1400         struct gtalk_pvt *p = nothing;
1401
1402         ast_mutex_lock(&p->lock);
1403         if (p->owner) {
1404                 if (!ast_channel_trylock(p->owner)) {
1405                         ast_log(LOG_NOTICE, "Auto-congesting %s\n", p->owner->name);
1406                         ast_queue_control(p->owner, AST_CONTROL_CONGESTION);
1407                         ast_channel_unlock(p->owner);
1408                 }
1409         }
1410         ast_mutex_unlock(&p->lock);
1411         return 0;
1412 }
1413 */
1414
1415 /*! \brief Initiate new call, part of PBX interface
1416  *      dest is the dial string */
1417 static int gtalk_call(struct ast_channel *ast, char *dest, int timeout)
1418 {
1419         struct gtalk_pvt *p = ast->tech_pvt;
1420
1421         if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
1422                 ast_log(LOG_WARNING, "gtalk_call called on %s, neither down nor reserved\n", ast->name);
1423                 return -1;
1424         }
1425
1426         ast_setstate(ast, AST_STATE_RING);
1427         p->jointcapability = p->capability;
1428         if (!p->ringrule) {
1429                 ast_copy_string(p->ring, p->parent->connection->mid, sizeof(p->ring));
1430                 p->ringrule = iks_filter_add_rule(p->parent->connection->f, gtalk_ringing_ack, p,
1431                                                         IKS_RULE_ID, p->ring, IKS_RULE_DONE);
1432         } else
1433                 ast_log(LOG_WARNING, "Whoa, already have a ring rule!\n");
1434
1435         gtalk_invite(p, p->them, p->us, p->sid, 1);
1436         gtalk_create_candidates(p->parent, p, p->sid, p->them, p->us);
1437
1438         return 0;
1439 }
1440
1441 /*! \brief Hangup a call through the gtalk proxy channel */
1442 static int gtalk_hangup(struct ast_channel *ast)
1443 {
1444         struct gtalk_pvt *p = ast->tech_pvt;
1445         struct gtalk *client;
1446
1447         ast_mutex_lock(&p->lock);
1448         client = p->parent;
1449         p->owner = NULL;
1450         ast->tech_pvt = NULL;
1451         if (!p->alreadygone)
1452                 gtalk_action(client, p, "terminate");
1453         ast_mutex_unlock(&p->lock);
1454
1455         gtalk_free_pvt(client, p);
1456
1457         return 0;
1458 }
1459
1460 /*! \brief Part of PBX interface */
1461 static struct ast_channel *gtalk_request(const char *type, int format, void *data, int *cause)
1462 {
1463         struct gtalk_pvt *p = NULL;
1464         struct gtalk *client = NULL;
1465         char *sender = NULL, *to = NULL, *s = NULL;
1466         struct ast_channel *chan = NULL;
1467
1468         if (data) {
1469                 s = ast_strdupa((char *) data);
1470                 if (s) {
1471                         sender = strsep(&s, "/");
1472                         if (sender && (sender[0] != '\0'))
1473                                 to = strsep(&s, "/");
1474                         if (!to) {
1475                                 ast_log(LOG_ERROR, "Bad arguments in Gtalk Dialstring: %s\n", (char*) data);
1476                                 if (s)
1477                                         free(s);
1478                                 return NULL;
1479                         }
1480                 }
1481         }
1482         client = find_gtalk(to, sender);
1483         if (!client) {
1484                 ast_log(LOG_WARNING, "Could not find recipient.\n");
1485                 if (s)
1486                         free(s);
1487                 return NULL;
1488         }
1489         p = gtalk_alloc(client, strchr(sender, '@') ? sender : client->connection->jid->full, strchr(to, '@') ? to : client->user, NULL);
1490         if (p)
1491                 chan = gtalk_new(client, p, AST_STATE_DOWN, to);
1492
1493         return chan;
1494 }
1495
1496 /*! \brief CLI command "gtalk show channels" */
1497 static int gtalk_show_channels(int fd, int argc, char **argv)
1498 {
1499         if (argc != 3)
1500                 return RESULT_SHOWUSAGE;
1501         ast_mutex_lock(&gtalklock);
1502 //      if (!gtalk_list->p)
1503                 ast_cli(fd, "No gtalk channels in use\n");
1504         ast_mutex_unlock(&gtalklock);
1505         return RESULT_SUCCESS;
1506 }
1507
1508 /*! \brief CLI command "gtalk show channels" */
1509 static int gtalk_do_reload(int fd, int argc, char **argv)
1510 {
1511         ast_verbose("IT DOES WORK!\n");
1512         return RESULT_SUCCESS;
1513 }
1514
1515 static int gtalk_parser(void *data, ikspak *pak)
1516 {
1517         struct gtalk *client = ASTOBJ_REF((struct gtalk *) data);
1518
1519         if (iks_find_with_attrib(pak->x, "session", "type", "initiate")) {
1520                 /* New call */
1521                 gtalk_newcall(client, pak);
1522         } else if (iks_find_with_attrib(pak->x, "session", "type", "candidates") || iks_find_with_attrib(pak->x, "session", "type", "transport-info") ) {
1523                 if (option_debug > 2)
1524                         ast_log(LOG_DEBUG, "About to add candidate!\n");
1525                 gtalk_add_candidate(client, pak);
1526                 if (option_debug > 2)
1527                         ast_log(LOG_DEBUG, "Candidate Added!\n");
1528         } else if (iks_find_with_attrib(pak->x, "session", "type", "accept")) {
1529                 gtalk_is_answered(client, pak);
1530         } else if (iks_find_with_attrib(pak->x, "session", "type", "content-info")) {
1531                 gtalk_handle_dtmf(client, pak);
1532         } else if (iks_find_with_attrib(pak->x, "session", "type", "terminate")) {
1533                 gtalk_hangup_farend(client, pak);
1534         } else if (iks_find_with_attrib(pak->x, "session", "type", "reject")) {
1535                 gtalk_hangup_farend(client, pak);
1536         }
1537         ASTOBJ_UNREF(client, gtalk_member_destroy);
1538         return IKS_FILTER_EAT;
1539 }
1540
1541 /* Not using this anymore probably take out soon
1542 static struct gtalk_candidate *gtalk_create_candidate(char *args)
1543 {
1544         char *name, *type, *preference, *protocol;
1545         struct gtalk_candidate *res;
1546         res = malloc(sizeof(struct gtalk_candidate));
1547         memset(res, 0, sizeof(struct gtalk_candidate));
1548         if (args)
1549                 name = args;
1550         if ((args = strchr(args, ','))) {
1551                 *args = '\0';
1552                 args++;
1553                 preference = args;
1554         }
1555         if ((args = strchr(args, ','))) {
1556                 *args = '\0';
1557                 args++;
1558                 protocol = args;
1559         }
1560         if ((args = strchr(args, ','))) {
1561                 *args = '\0';
1562                 args++;
1563                 type = args;
1564         }
1565         if (name)
1566                 ast_copy_string(res->name, name, sizeof(res->name));
1567         if (preference) {
1568                 res->preference = atof(preference);
1569         }
1570         if (protocol) {
1571                 if (!strcasecmp("udp", protocol))
1572                         res->protocol = AJI_PROTOCOL_UDP;
1573                 if (!strcasecmp("ssltcp", protocol))
1574                         res->protocol = AJI_PROTOCOL_SSLTCP;
1575         }
1576         if (type) {
1577                 if (!strcasecmp("stun", type))
1578                         res->type = AJI_CONNECT_STUN;
1579                 if (!strcasecmp("local", type))
1580                         res->type = AJI_CONNECT_LOCAL;
1581                 if (!strcasecmp("relay", type))
1582                         res->type = AJI_CONNECT_RELAY;
1583         }
1584
1585         return res;
1586 }
1587 */
1588
1589 static int gtalk_create_member(char *label, struct ast_variable *var, int allowguest,
1590                                                                 struct ast_codec_pref prefs, char *context,
1591                                                                 struct gtalk *member)
1592 {
1593         struct aji_client *client;
1594
1595         if (!member)
1596                 ast_log(LOG_WARNING, "Out of memory.\n");
1597
1598         ast_copy_string(member->name, label, sizeof(member->name));
1599         ast_copy_string(member->user, label, sizeof(member->user));
1600         ast_copy_string(member->context, context, sizeof(member->context));
1601         member->allowguest = allowguest;
1602         member->prefs = prefs;
1603         while (var) {
1604 #if 0
1605                 struct gtalk_candidate *candidate = NULL;
1606 #endif
1607                 if (!strcasecmp(var->name, "username"))
1608                         ast_copy_string(member->user, var->value, sizeof(member->user));
1609                 else if (!strcasecmp(var->name, "disallow"))
1610                         ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 0);
1611                 else if (!strcasecmp(var->name, "allow"))
1612                         ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 1);
1613                 else if (!strcasecmp(var->name, "context"))
1614                         ast_copy_string(member->context, var->value, sizeof(member->context));
1615 #if 0
1616                 else if (!strcasecmp(var->name, "candidate")) {
1617                         candidate = gtalk_create_candidate(var->value);
1618                         if (candidate) {
1619                                 candidate->next = member->ourcandidates;
1620                                 member->ourcandidates = candidate;
1621                         }
1622                 }
1623 #endif
1624                 else if (!strcasecmp(var->name, "connection")) {
1625                         if ((client = ast_aji_get_client(var->value))) {
1626                                 member->connection = client;
1627                                 iks_filter_add_rule(client->f, gtalk_parser, member, IKS_RULE_TYPE,
1628                                                                         IKS_PAK_IQ, IKS_RULE_FROM_PARTIAL, member->user,
1629                                                                         IKS_RULE_NS, "http://www.google.com/session",
1630                                                                         IKS_RULE_DONE);
1631
1632                         } else {
1633                                 ast_log(LOG_ERROR, "connection referenced not found!\n");
1634                                 return 0;
1635                         }
1636                 }
1637                 var = var->next;
1638         }
1639         if (member->connection && member->user)
1640                 member->buddy = ASTOBJ_CONTAINER_FIND(&member->connection->buddies, member->user);
1641         else {
1642                 ast_log(LOG_ERROR, "No Connection or Username!\n");
1643         }
1644         return 1;
1645 }
1646
1647 static int gtalk_load_config(void)
1648 {
1649         char *cat = NULL;
1650         struct ast_config *cfg = NULL;
1651         char context[100];
1652         int allowguest = 1;
1653         struct ast_variable *var;
1654         struct gtalk *member;
1655         struct ast_codec_pref prefs;
1656         struct aji_client_container *clients;
1657         struct gtalk_candidate *global_candidates = NULL;
1658         struct hostent *hp;
1659         struct ast_hostent ahp;
1660
1661         cfg = ast_config_load(GOOGLE_CONFIG);
1662         if (!cfg)
1663                 return 0;
1664
1665         /* Copy the default jb config over global_jbconf */
1666         memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
1667
1668         cat = ast_category_browse(cfg, NULL);
1669         for (var = ast_variable_browse(cfg, "general"); var; var = var->next) {
1670                 /* handle jb conf */
1671                 if (!ast_jb_read_conf(&global_jbconf, var->name, var->value))
1672                         continue;
1673
1674                 if (!strcasecmp(var->name, "allowguest"))
1675                         allowguest =
1676                                 (ast_true(ast_variable_retrieve(cfg, "general", "allowguest"))) ? 1 : 0;
1677                 else if (!strcasecmp(var->name, "disallow"))
1678                         ast_parse_allow_disallow(&prefs, &global_capability, var->value, 0);
1679                 else if (!strcasecmp(var->name, "allow"))
1680                         ast_parse_allow_disallow(&prefs, &global_capability, var->value, 1);
1681                 else if (!strcasecmp(var->name, "context"))
1682                         ast_copy_string(context, var->value, sizeof(context));
1683                 else if (!strcasecmp(var->name, "bindaddr")) {
1684                         if (!(hp = ast_gethostbyname(var->value, &ahp))) {
1685                                 ast_log(LOG_WARNING, "Invalid address: %s\n", var->value);
1686                         } else {
1687                                 memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
1688                         }
1689                 }
1690 /*  Idea to allow for custom candidates  */
1691 /*
1692                 else if (!strcasecmp(var->name, "candidate")) {
1693                         candidate = gtalk_create_candidate(var->value);
1694                         if (candidate) {
1695                                 candidate->next = global_candidates;
1696                                 global_candidates = candidate;
1697                         }
1698                 }
1699 */
1700         }
1701         while (cat) {
1702                 if (strcasecmp(cat, "general")) {
1703                         var = ast_variable_browse(cfg, cat);
1704                         member = (struct gtalk *) malloc(sizeof(struct gtalk));
1705                         memset(member, 0, sizeof(struct gtalk));
1706                         ASTOBJ_INIT(member);
1707                         ASTOBJ_WRLOCK(member);
1708                         if (!strcasecmp(cat, "guest")) {
1709                                 ast_copy_string(member->name, "guest", sizeof(member->name));
1710                                 ast_copy_string(member->user, "guest", sizeof(member->user));
1711                                 ast_copy_string(member->context, context, sizeof(member->context));
1712                                 member->allowguest = allowguest;
1713                                 member->prefs = prefs;
1714                                 while (var) {
1715                                         if (!strcasecmp(var->name, "disallow"))
1716                                                 ast_parse_allow_disallow(&member->prefs, &member->capability,
1717                                                                                                  var->value, 0);
1718                                         else if (!strcasecmp(var->name, "allow"))
1719                                                 ast_parse_allow_disallow(&member->prefs, &member->capability,
1720                                                                                                  var->value, 1);
1721                                         else if (!strcasecmp(var->name, "context"))
1722                                                 ast_copy_string(member->context, var->value,
1723                                                                                 sizeof(member->context));
1724 /*  Idea to allow for custom candidates  */
1725 /*
1726                                         else if (!strcasecmp(var->name, "candidate")) {
1727                                                 candidate = gtalk_create_candidate(var->value);
1728                                                 if (candidate) {
1729                                                         candidate->next = member->ourcandidates;
1730                                                         member->ourcandidates = candidate;
1731                                                 }
1732                                         }
1733 */
1734                                         var = var->next;
1735                                 }
1736                                 ASTOBJ_UNLOCK(member);
1737                                 clients = ast_aji_get_clients();
1738                                 if (clients) {
1739                                         ASTOBJ_CONTAINER_TRAVERSE(clients, 1, {
1740                                                 ASTOBJ_WRLOCK(iterator);
1741                                                 ASTOBJ_WRLOCK(member);
1742                                                 member->connection = iterator;
1743                                                 iks_filter_add_rule(iterator->f, gtalk_parser, member, IKS_RULE_TYPE, IKS_PAK_IQ, IKS_RULE_NS,
1744                                                                                 "http://www.google.com/session", IKS_RULE_DONE);
1745                                                 ASTOBJ_UNLOCK(member);
1746                                                 ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
1747                                                 ASTOBJ_UNLOCK(iterator);
1748                                         });
1749                                 } else {
1750                                         ASTOBJ_UNLOCK(member);
1751                                         ASTOBJ_UNREF(member, gtalk_member_destroy);
1752                                 }
1753                         } else {
1754                                 ASTOBJ_UNLOCK(member);
1755                                 if (gtalk_create_member(cat, var, allowguest, prefs, context, member))
1756                                         ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
1757                                 ASTOBJ_UNREF(member, gtalk_member_destroy);
1758                         }
1759                 }
1760                 cat = ast_category_browse(cfg, cat);
1761         }
1762         gtalk_free_candidates(global_candidates);
1763         return 1;
1764 }
1765
1766 /*! \brief Load module into PBX, register channel */
1767 static int load_module(void)
1768 {
1769         ASTOBJ_CONTAINER_INIT(&gtalk_list);
1770         if (!gtalk_load_config()) {
1771                 ast_log(LOG_ERROR, "Unable to read config file %s. Not loading module.\n", GOOGLE_CONFIG);
1772                 return 0;
1773         }
1774
1775         sched = sched_context_create();
1776         if (!sched)
1777                 ast_log(LOG_WARNING, "Unable to create schedule context\n");
1778
1779         io = io_context_create();
1780         if (!io)
1781                 ast_log(LOG_WARNING, "Unable to create I/O context\n");
1782
1783         if (ast_find_ourip(&__ourip, bindaddr)) {
1784                 ast_log(LOG_WARNING, "Unable to get own IP address, Gtalk disabled\n");
1785                 return 0;
1786         }
1787
1788         ast_rtp_proto_register(&gtalk_rtp);
1789         ast_cli_register_multiple(gtalk_cli, sizeof(gtalk_cli) / sizeof(gtalk_cli[0]));
1790
1791         /* Make sure we can register our channel type */
1792         if (ast_channel_register(&gtalk_tech)) {
1793                 ast_log(LOG_ERROR, "Unable to register channel class %s\n", type);
1794                 return -1;
1795         }
1796         return 0;
1797 }
1798
1799 /*! \brief Reload module */
1800 static int reload(void)
1801 {
1802         return 0;
1803 }
1804
1805 /*! \brief Unload the gtalk channel from Asterisk */
1806 static int unload_module(void)
1807 {
1808         struct gtalk_pvt *privates = NULL;
1809         ast_cli_unregister_multiple(gtalk_cli, sizeof(gtalk_cli) / sizeof(gtalk_cli[0]));
1810         /* First, take us out of the channel loop */
1811         ast_channel_unregister(&gtalk_tech);
1812         ast_rtp_proto_unregister(&gtalk_rtp);
1813
1814         if (!ast_mutex_lock(&gtalklock)) {
1815                 /* Hangup all interfaces if they have an owner */
1816                 ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
1817                         ASTOBJ_WRLOCK(iterator);
1818                         privates = iterator->p;
1819                         while(privates) {
1820                                 if (privates->owner)
1821                                         ast_softhangup(privates->owner, AST_SOFTHANGUP_APPUNLOAD);
1822                                 privates = privates->next;
1823                         }
1824                         iterator->p = NULL;
1825                         ASTOBJ_UNLOCK(iterator);
1826                 });
1827                 ast_mutex_unlock(&gtalklock);
1828         } else {
1829                 ast_log(LOG_WARNING, "Unable to lock the monitor\n");
1830                 return -1;
1831         }
1832         ASTOBJ_CONTAINER_DESTROYALL(&gtalk_list, gtalk_member_destroy);
1833         ASTOBJ_CONTAINER_DESTROY(&gtalk_list);
1834         return 0;
1835 }
1836
1837 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Gtalk Channel Driver",
1838                 .load = load_module,
1839                 .unload = unload_module,
1840                 .reload = reload,
1841                );