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         <depend>res_jabber</depend>
  31         <use>gnutls</use>
  32  ***/
  33
  34 #include "asterisk.h"
  35
  36 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  37
  38 #include <stdlib.h>
  39 #include <stdio.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42 #include <sys/socket.h>
  43 #include <errno.h>
  44 #include <stdlib.h>
  45 #include <fcntl.h>
  46 #include <netdb.h>
  47 #include <netinet/in.h>
  48 #include <arpa/inet.h>
  49 #include <sys/signal.h>
  50 #include <iksemel.h>
  51 #include <pthread.h>
  52
  53 #ifdef HAVE_GNUTLS
  54 #include <gcrypt.h>
  55 GCRY_THREAD_OPTION_PTHREAD_IMPL;
  56 #endif /* HAVE_GNUTLS */
  57
  58 #include "asterisk/lock.h"
  59 #include "asterisk/channel.h"
  60 #include "asterisk/config.h"
  61 #include "asterisk/logger.h"
  62 #include "asterisk/module.h"
  63 #include "asterisk/pbx.h"
  64 #include "asterisk/options.h"
  65 #include "asterisk/lock.h"
  66 #include "asterisk/sched.h"
  67 #include "asterisk/io.h"
  68 #include "asterisk/rtp.h"
  69 #include "asterisk/acl.h"
  70 #include "asterisk/callerid.h"
  71 #include "asterisk/file.h"
  72 #include "asterisk/cli.h"
  73 #include "asterisk/app.h"
  74 #include "asterisk/musiconhold.h"
  75 #include "asterisk/manager.h"
  76 #include "asterisk/stringfields.h"
  77 #include "asterisk/utils.h"
  78 #include "asterisk/causes.h"
  79 #include "asterisk/astobj.h"
  80 #include "asterisk/abstract_jb.h"
  81 #include "asterisk/jabber.h"
  82
  83 #define GOOGLE_CONFIG "gtalk.conf"
  84
  85 #define GOOGLE_NS "http://www.google.com/session"
  86
  87
  88 /*! Global jitterbuffer configuration - by default, jb is disabled */
  89 static struct ast_jb_conf default_jbconf =
  90 {
  91         .flags = 0,
  92         .max_size = -1,
  93         .resync_threshold = -1,
  94         .impl = ""
  95 };
  96 static struct ast_jb_conf global_jbconf;
  97
  98 enum gtalk_protocol {
  99         AJI_PROTOCOL_UDP = 1,
 100         AJI_PROTOCOL_SSLTCP = 2,
 101 };
 102
 103 enum gtalk_connect_type {
 104         AJI_CONNECT_STUN = 1,
 105         AJI_CONNECT_LOCAL = 2,
 106         AJI_CONNECT_RELAY = 3,
 107 };
 108
 109 struct gtalk_pvt {
 110         ast_mutex_t lock;                /*!< Channel private lock */
 111         time_t laststun;
 112         struct gtalk *parent;            /*!< Parent client */
 113         char sid[100];
 114         char us[AJI_MAX_JIDLEN];
 115         char them[AJI_MAX_JIDLEN];
 116         char ring[10];                   /*!< Message ID of ring */
 117         iksrule *ringrule;               /*!< Rule for matching RING request */
 118         int initiator;                   /*!< If we're the initiator */
 119         int alreadygone;
 120         int capability;
 121         struct ast_codec_pref prefs;
 122         struct gtalk_candidate *theircandidates;
 123         struct gtalk_candidate *ourcandidates;
 124         char cid_num[80];                /*!< Caller ID num */
 125         char cid_name[80];               /*!< Caller ID name */
 126         char exten[80];                  /*!< Called extension */
 127         struct ast_channel *owner;       /*!< Master Channel */
 128         struct ast_rtp *rtp;             /*!< RTP audio session */
 129         struct ast_rtp *vrtp;            /*!< RTP video session */
 130         int jointcapability;             /*!< Supported capability at both ends (codecs ) */
 131         int peercapability;
 132         struct gtalk_pvt *next; /* Next entity */
 133 };
 134
 135 struct gtalk_candidate {
 136         char name[100];
 137         enum gtalk_protocol protocol;
 138         double preference;
 139         char username[100];
 140         char password[100];
 141         enum gtalk_connect_type type;
 142         char network[6];
 143         int generation;
 144         char ip[16];
 145         int port;
 146         int receipt;
 147         struct gtalk_candidate *next;
 148 };
 149
 150 struct gtalk {
 151         ASTOBJ_COMPONENTS(struct gtalk);
 152         struct aji_client *connection;
 153         struct aji_buddy *buddy;
 154         struct gtalk_pvt *p;
 155         struct ast_codec_pref prefs;
 156         int amaflags;                   /*!< AMA Flags */
 157         char user[AJI_MAX_JIDLEN];
 158         char context[AST_MAX_CONTEXT];
 159         char accountcode[AST_MAX_ACCOUNT_CODE]; /*!< Account code */
 160         int capability;
 161         ast_group_t callgroup;  /*!< Call group */
 162         ast_group_t pickupgroup;        /*!< Pickup group */
 163         int callingpres;                /*!< Calling presentation */
 164         int allowguest;
 165         char language[MAX_LANGUAGE];    /*!<  Default language for prompts */
 166         char musicclass[MAX_MUSICCLASS];        /*!<  Music on Hold class */
 167 };
 168
 169 struct gtalk_container {
 170         ASTOBJ_CONTAINER_COMPONENTS(struct gtalk);
 171 };
 172
 173 static const char desc[] = "Gtalk Channel";
 174
 175 static int global_capability = AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_GSM | AST_FORMAT_H263;
 176
 177 AST_MUTEX_DEFINE_STATIC(gtalklock); /*!< Protect the interface list (of gtalk_pvt's) */
 178
 179 /* Forward declarations */
 180 static struct ast_channel *gtalk_request(const char *type, int format, void *data, int *cause);
 181 static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration);
 182 static int gtalk_digit_begin(struct ast_channel *ast, char digit);
 183 static int gtalk_digit_end(struct ast_channel *ast, char digit, unsigned int duration);
 184 static int gtalk_call(struct ast_channel *ast, char *dest, int timeout);
 185 static int gtalk_hangup(struct ast_channel *ast);
 186 static int gtalk_answer(struct ast_channel *ast);
 187 static int gtalk_action(struct gtalk *client, struct gtalk_pvt *p, const char *action);
 188 static void gtalk_free_pvt(struct gtalk *client, struct gtalk_pvt *p);
 189 static int gtalk_newcall(struct gtalk *client, ikspak *pak);
 190 static struct ast_frame *gtalk_read(struct ast_channel *ast);
 191 static int gtalk_write(struct ast_channel *ast, struct ast_frame *f);
 192 static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen);
 193 static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
 194 static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen);
 195 static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid);
 196 static int gtalk_do_reload(int fd, int argc, char **argv);
 197 static int gtalk_show_channels(int fd, int argc, char **argv);
 198 /*----- RTP interface functions */
 199 static int gtalk_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp,
 200                                                            struct ast_rtp *vrtp, int codecs, int nat_active);
 201 static enum ast_rtp_get_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp);
 202 static int gtalk_get_codec(struct ast_channel *chan);
 203
 204 /*! \brief PBX interface structure for channel registration */
 205 static const struct ast_channel_tech gtalk_tech = {
 206         .type = "Gtalk",
 207         .description = "Gtalk Channel Driver",
 208         .capabilities = ((AST_FORMAT_MAX_AUDIO << 1) - 1),
 209         .requester = gtalk_request,
 210         .send_digit_begin = gtalk_digit_begin,
 211         .send_digit_end = gtalk_digit_end,
 212         .bridge = ast_rtp_bridge,
 213         .call = gtalk_call,
 214         .hangup = gtalk_hangup,
 215         .answer = gtalk_answer,
 216         .read = gtalk_read,
 217         .write = gtalk_write,
 218         .exception = gtalk_read,
 219         .indicate = gtalk_indicate,
 220         .fixup = gtalk_fixup,
 221         .send_html = gtalk_sendhtml,
 222         .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER
 223 };
 224
 225 static struct sockaddr_in bindaddr = { 0, };    /*!< The address we bind to */
 226
 227 static struct sched_context *sched;     /*!< The scheduling context */
 228 static struct io_context *io;   /*!< The IO context */
 229 static struct in_addr __ourip;
 230
 231
 232 /*! \brief RTP driver interface */
 233 static struct ast_rtp_protocol gtalk_rtp = {
 234         type: "Gtalk",
 235         get_rtp_info: gtalk_get_rtp_peer,
 236         set_rtp_peer: gtalk_set_rtp_peer,
 237         get_codec: gtalk_get_codec,
 238 };
 239
 240 static char show_channels_usage[] =
 241 "Usage: gtalk show channels\n"
 242 "       Shows current state of the Gtalk channels.\n";
 243
 244 static char reload_usage[] =
 245 "Usage: gtalk reload\n"
 246 "       Reload gtalk channel driver.\n";
 247
 248
 249 static struct ast_cli_entry gtalk_cli[] = {
 250         {{ "gtalk", "reload", NULL}, gtalk_do_reload, "Reload GoogleTalk configuration", reload_usage },
 251         {{ "gtalk", "show", "channels", NULL}, gtalk_show_channels, "Show GoogleTalk channels", show_channels_usage },
 252  };
 253
 254
 255
 256 static char externip[16];
 257
 258 static struct gtalk_container gtalk_list;
 259
 260 static void gtalk_member_destroy(struct gtalk *obj)
 261 {
 262         free(obj);
 263 }
 264
 265 static struct gtalk *find_gtalk(char *name, char *connection)
 266 {
 267         struct gtalk *gtalk = NULL;
 268         char *domain = NULL , *s = NULL;
 269
 270         if(strchr(connection, '@')) {
 271                 s = ast_strdupa(connection);
 272                 domain = strsep(&s, "@");
 273                 ast_verbose("OOOOH domain = %s\n", domain);
 274         }
 275         gtalk = ASTOBJ_CONTAINER_FIND(&gtalk_list, name);
 276         if (!gtalk && strchr(name, '@'))
 277                 gtalk = ASTOBJ_CONTAINER_FIND_FULL(&gtalk_list, name, user,,, strcasecmp);
 278
 279         if (!gtalk) {
 280                 /* guest call */
 281                 ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
 282                         ASTOBJ_RDLOCK(iterator);
 283                         if (!strcasecmp(iterator->name, "guest")) {
 284                                 gtalk = iterator;
 285                         }
 286                         ASTOBJ_UNLOCK(iterator);
 287
 288                         if (gtalk)
 289                                 break;
 290                 });
 291
 292         }
 293         return gtalk;
 294 }
 295
 296
 297 static int add_codec_to_answer(const struct gtalk_pvt *p, int codec, iks *dcodecs)
 298 {
 299         int res = 0;
 300         char *format = ast_getformatname(codec);
 301
 302         if (!strcasecmp("ulaw", format)) {
 303                 iks *payload_eg711u, *payload_pcmu;
 304                 payload_pcmu = iks_new("payload-type");
 305                 payload_eg711u = iks_new("payload-type");
 306
 307                 if(!payload_eg711u || !payload_pcmu) {
 308                         if(payload_pcmu)
 309                                 iks_delete(payload_pcmu);
 310                         if(payload_eg711u)
 311                                 iks_delete(payload_eg711u);
 312                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 313                         return -1;
 314                 }
 315                 iks_insert_attrib(payload_pcmu, "id", "0");
 316                 iks_insert_attrib(payload_pcmu, "name", "PCMU");
 317                 iks_insert_attrib(payload_pcmu, "clockrate","8000");
 318                 iks_insert_attrib(payload_pcmu, "bitrate","64000");
 319                 iks_insert_attrib(payload_eg711u, "id", "100");
 320                 iks_insert_attrib(payload_eg711u, "name", "EG711U");
 321                 iks_insert_attrib(payload_eg711u, "clockrate","8000");
 322                 iks_insert_attrib(payload_eg711u, "bitrate","64000");
 323                 iks_insert_node(dcodecs, payload_pcmu);
 324                 iks_insert_node(dcodecs, payload_eg711u);
 325                 res ++;
 326         }
 327         if (!strcasecmp("alaw", format)) {
 328                 iks *payload_eg711a, *payload_pcma;
 329                 payload_pcma = iks_new("payload-type");
 330                 payload_eg711a = iks_new("payload-type");
 331                 if(!payload_eg711a || !payload_pcma) {
 332                         if(payload_eg711a)
 333                                 iks_delete(payload_eg711a);
 334                         if(payload_pcma)
 335                                 iks_delete(payload_pcma);
 336                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 337                         return -1;
 338                 }
 339                 iks_insert_attrib(payload_pcma, "id", "8");
 340                 iks_insert_attrib(payload_pcma, "name", "PCMA");
 341                 iks_insert_attrib(payload_pcma, "clockrate","8000");
 342                 iks_insert_attrib(payload_pcma, "bitrate","64000");
 343                 payload_eg711a = iks_new("payload-type");
 344                 iks_insert_attrib(payload_eg711a, "id", "101");
 345                 iks_insert_attrib(payload_eg711a, "name", "EG711A");
 346                 iks_insert_attrib(payload_eg711a, "clockrate","8000");
 347                 iks_insert_attrib(payload_eg711a, "bitrate","64000");
 348                 iks_insert_node(dcodecs, payload_pcma);
 349                 iks_insert_node(dcodecs, payload_eg711a);
 350                 res ++;
 351         }
 352         if (!strcasecmp("ilbc", format)) {
 353                 iks *payload_ilbc = iks_new("payload-type");
 354                 if(!payload_ilbc) {
 355                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 356                         return -1;
 357                 }
 358                 iks_insert_attrib(payload_ilbc, "id", "97");
 359                 iks_insert_attrib(payload_ilbc, "name", "iLBC");
 360                 iks_insert_attrib(payload_ilbc, "clockrate","8000");
 361                 iks_insert_attrib(payload_ilbc, "bitrate","13300");
 362                 iks_insert_node(dcodecs, payload_ilbc);
 363                 res ++;
 364         }
 365         if (!strcasecmp("g723", format)) {
 366                 iks *payload_g723 = iks_new("payload-type");
 367                 if(!payload_g723) {
 368                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 369                         return -1;
 370                 }
 371                 iks_insert_attrib(payload_g723, "id", "4");
 372                 iks_insert_attrib(payload_g723, "name", "G723");
 373                 iks_insert_attrib(payload_g723, "clockrate","8000");
 374                 iks_insert_attrib(payload_g723, "bitrate","6300");
 375                 iks_insert_node(dcodecs, payload_g723);
 376                 res ++;
 377         }
 378         if (!strcasecmp("speex", format)) {
 379                 iks *payload_speex = iks_new("payload-type");
 380                 if(!payload_speex) {
 381                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 382                         return -1;
 383                 }
 384                 iks_insert_attrib(payload_speex, "id", "110");
 385                 iks_insert_attrib(payload_speex, "name", "speex");
 386                 iks_insert_attrib(payload_speex, "clockrate","8000");
 387                 iks_insert_attrib(payload_speex, "bitrate","11000");
 388                 iks_insert_node(dcodecs, payload_speex);
 389                 res++;
 390         }
 391         if (!strcasecmp("gsm", format)) {
 392                 iks *payload_gsm = iks_new("payload-type");
 393                 if(!payload_gsm) {
 394                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 395                         return -1;
 396                 }
 397                 iks_insert_attrib(payload_gsm, "id", "103");
 398                 iks_insert_attrib(payload_gsm, "name", "gsm");
 399                 iks_insert_node(dcodecs, payload_gsm);
 400                 res++;
 401         }
 402         ast_rtp_lookup_code(p->rtp, 1, codec);
 403         return res;
 404 }
 405
 406 static int gtalk_invite(struct gtalk_pvt *p, char *to, char *from, char *sid, int initiator)
 407 {
 408         struct gtalk *client = p->parent;
 409         iks *iq, *gtalk, *dcodecs, *payload_telephone, *transport;
 410         int x;
 411         int pref_codec = 0;
 412         int alreadysent = 0;
 413         int codecs_num = 0;
 414
 415         iq = iks_new("iq");
 416         gtalk = iks_new("session");
 417         dcodecs = iks_new("description");
 418         transport = iks_new("transport");
 419         payload_telephone = iks_new("payload-type");
 420         if (!(iq && gtalk && dcodecs && transport && payload_telephone)){
 421                 if(iq)
 422                         iks_delete(iq);
 423                 if(gtalk)
 424                         iks_delete(gtalk);
 425                 if(dcodecs)
 426                         iks_delete(dcodecs);
 427                 if(transport)
 428                         iks_delete(transport);
 429                 if(payload_telephone)
 430                         iks_delete(payload_telephone);
 431
 432                 ast_log(LOG_ERROR, "Could not allocate iksemel nodes\n");
 433                 return 0;
 434         }
 435         iks_insert_attrib(dcodecs, "xmlns", "http://www.google.com/session/phone");
 436         iks_insert_attrib(dcodecs, "xml:lang", "en");
 437
 438         for (x = 0; x < 32; x++) {
 439                 if (!(pref_codec = ast_codec_pref_index(&client->prefs, x)))
 440                         break;
 441                 if (!(client->capability & pref_codec))
 442                         continue;
 443                 if (alreadysent & pref_codec)
 444                         continue;
 445                 codecs_num = add_codec_to_answer(p, pref_codec, dcodecs);
 446                 alreadysent |= pref_codec;
 447         }
 448
 449         if (codecs_num) {
 450                 /* only propose DTMF within an audio session */
 451                 iks_insert_attrib(payload_telephone, "id", "106");
 452                 iks_insert_attrib(payload_telephone, "name", "telephone-event");
 453                 iks_insert_attrib(payload_telephone, "clockrate", "8000");
 454         }
 455         iks_insert_attrib(transport,"xmlns","http://www.google.com/transport/p2p");
 456
 457         iks_insert_attrib(iq, "type", "set");
 458         iks_insert_attrib(iq, "to", to);
 459         iks_insert_attrib(iq, "from", from);
 460         iks_insert_attrib(iq, "id", client->connection->mid);
 461         ast_aji_increment_mid(client->connection->mid);
 462
 463         iks_insert_attrib(gtalk, "xmlns", "http://www.google.com/session");
 464         iks_insert_attrib(gtalk, "type",initiator ? "initiate": "accept");
 465         iks_insert_attrib(gtalk, "initiator", initiator ? from : to);
 466         iks_insert_attrib(gtalk, "id", sid);
 467         iks_insert_node(iq, gtalk);
 468         iks_insert_node(gtalk, dcodecs);
 469         iks_insert_node(gtalk, transport);
 470         iks_insert_node(dcodecs, payload_telephone);
 471
 472         iks_send(client->connection->p, iq);
 473         iks_delete(payload_telephone);
 474         iks_delete(transport);
 475         iks_delete(dcodecs);
 476         iks_delete(gtalk);
 477         iks_delete(iq);
 478         return 1;
 479 }
 480
 481 static int gtalk_invite_response(struct gtalk_pvt *p, char *to , char *from, char *sid, int initiator)
 482 {
 483         iks *iq, *session, *transport;
 484         iq = iks_new("iq");
 485         session = iks_new("session");
 486         transport = iks_new("transport");
 487         if(!(iq && session && transport)) {
 488                 if(iq)
 489                         iks_delete(iq);
 490                 if(session)
 491                         iks_delete(session);
 492                 if(transport)
 493                         iks_delete(transport);
 494                 ast_log(LOG_ERROR, " Unable to allocate IKS node\n");
 495                 return -1;
 496         }
 497         iks_insert_attrib(iq, "from", from);
 498         iks_insert_attrib(iq, "to", to);
 499         iks_insert_attrib(iq, "type", "set");
 500         iks_insert_attrib(iq, "id",p->parent->connection->mid);
 501         ast_aji_increment_mid(p->parent->connection->mid);
 502         iks_insert_attrib(session, "type", "transport-accept");
 503         iks_insert_attrib(session, "id", sid);
 504         iks_insert_attrib(session, "initiator", initiator ? from : to);
 505         iks_insert_attrib(session, "xmlns", "http://www.google.com/session");
 506         iks_insert_attrib(transport, "xmlns", "http://www.google.com/transport/p2p");
 507         iks_insert_node(iq,session);
 508         iks_insert_node(session,transport);
 509         iks_send(p->parent->connection->p, iq);
 510         iks_delete(transport);
 511         iks_delete(session);
 512         iks_delete(iq);
 513         return 1;
 514
 515 }
 516
 517 static int gtalk_ringing_ack(void *data, ikspak *pak)
 518 {
 519         struct gtalk_pvt *p = data;
 520
 521         if (p->ringrule)
 522                 iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
 523         p->ringrule = NULL;
 524         if (p->owner)
 525                 ast_queue_control(p->owner, AST_CONTROL_RINGING);
 526         return IKS_FILTER_EAT;
 527 }
 528
 529 static int gtalk_answer(struct ast_channel *ast)
 530 {
 531         struct gtalk_pvt *p = ast->tech_pvt;
 532         int res = 0;
 533
 534         if (option_debug)
 535                 ast_log(LOG_DEBUG, "Answer!\n");
 536         ast_mutex_lock(&p->lock);
 537         gtalk_invite(p, p->them, p->us,p->sid, 0);
 538         ast_mutex_unlock(&p->lock);
 539         return res;
 540 }
 541
 542 static enum ast_rtp_get_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp)
 543 {
 544         struct gtalk_pvt *p = chan->tech_pvt;
 545         enum ast_rtp_get_result res = AST_RTP_GET_FAILED;
 546
 547         if (!p)
 548                 return res;
 549
 550         ast_mutex_lock(&p->lock);
 551         if (p->rtp){
 552                 *rtp = p->rtp;
 553                 res = AST_RTP_TRY_PARTIAL;
 554         }
 555         ast_mutex_unlock(&p->lock);
 556
 557         return res;
 558 }
 559
 560 static int gtalk_get_codec(struct ast_channel *chan)
 561 {
 562         struct gtalk_pvt *p = chan->tech_pvt;
 563         return p->peercapability;
 564 }
 565
 566 static int gtalk_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp, int codecs, int nat_active)
 567 {
 568         struct gtalk_pvt *p;
 569
 570         p = chan->tech_pvt;
 571         if (!p)
 572                 return -1;
 573         ast_mutex_lock(&p->lock);
 574
 575 /*      if (rtp)
 576                 ast_rtp_get_peer(rtp, &p->redirip);
 577         else
 578                 memset(&p->redirip, 0, sizeof(p->redirip));
 579         p->redircodecs = codecs; */
 580
 581         /* Reset lastrtprx timer */
 582         ast_mutex_unlock(&p->lock);
 583         return 0;
 584 }
 585
 586 static int gtalk_response(struct gtalk *client, char *from, ikspak *pak, const char *reasonstr, const char *reasonstr2)
 587 {
 588         iks *response = NULL, *error = NULL, *reason = NULL;
 589         int res = -1;
 590
 591         response = iks_new("iq");
 592         if (response) {
 593                 iks_insert_attrib(response, "type", "result");
 594                 iks_insert_attrib(response, "from", from);
 595                 iks_insert_attrib(response, "to", iks_find_attrib(pak->x, "from"));
 596                 iks_insert_attrib(response, "id", iks_find_attrib(pak->x, "id"));
 597                 if (reasonstr) {
 598                         error = iks_new("error");
 599                         if (error) {
 600                                 iks_insert_attrib(error, "type", "cancel");
 601                                 reason = iks_new(reasonstr);
 602                                 if (reason)
 603                                         iks_insert_node(error, reason);
 604                                 iks_insert_node(response, error);
 605                         }
 606                 }
 607                 iks_send(client->connection->p, response);
 608                 if (reason)
 609                         iks_delete(reason);
 610                 if (error)
 611                         iks_delete(error);
 612                 iks_delete(response);
 613                 res = 0;
 614         }
 615         return res;
 616 }
 617
 618 static int gtalk_is_answered(struct gtalk *client, ikspak *pak)
 619 {
 620         struct gtalk_pvt *tmp;
 621         char *from;
 622         iks *codec;
 623         char s1[BUFSIZ], s2[BUFSIZ], s3[BUFSIZ];
 624         int peernoncodeccapability;
 625
 626         ast_log(LOG_DEBUG, "The client is %s\n", client->name);
 627         /* Make sure our new call doesn't exist yet */
 628         for (tmp = client->p; tmp; tmp = tmp->next) {
 629                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
 630                         break;
 631         }
 632
 633         /* codec points to the first <payload-type/> tag */
 634         codec = iks_child(iks_child(iks_child(pak->x)));
 635         while (codec) {
 636                 ast_rtp_set_m_type(tmp->rtp, atoi(iks_find_attrib(codec, "id")));
 637                 ast_rtp_set_rtpmap_type(tmp->rtp, atoi(iks_find_attrib(codec, "id")), "audio", iks_find_attrib(codec, "name"), 0);
 638                 codec = iks_next(codec);
 639         }
 640
 641         /* Now gather all of the codecs that we are asked for */
 642         ast_rtp_get_current_formats(tmp->rtp, &tmp->peercapability, &peernoncodeccapability);
 643
 644         /* at this point, we received an awser from the remote Gtalk client,
 645            which allows us to compare capabilities */
 646         tmp->jointcapability = tmp->capability & tmp->peercapability;
 647         if (!tmp->jointcapability) {
 648                 ast_log(LOG_WARNING, "Capabilities don't match : us - %s, peer - %s, combined - %s \n", ast_getformatname_multiple(s1, BUFSIZ, tmp->capability),
 649                         ast_getformatname_multiple(s2, BUFSIZ, tmp->peercapability),
 650                         ast_getformatname_multiple(s3, BUFSIZ, tmp->jointcapability));
 651                 /* close session if capabilities don't match */
 652                 ast_queue_hangup(tmp->owner);
 653
 654                 return -1;
 655
 656         }
 657
 658         from = iks_find_attrib(pak->x, "to");
 659         if(!from)
 660                 from = client->connection->jid->full;
 661
 662         if (tmp) {
 663                 if (tmp->owner)
 664                         ast_queue_control(tmp->owner, AST_CONTROL_ANSWER);
 665         } else
 666                 ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
 667         gtalk_response(client, from, pak, NULL, NULL);
 668         return 1;
 669 }
 670
 671 static int gtalk_is_accepted(struct gtalk *client, ikspak *pak)
 672 {
 673         struct gtalk_pvt *tmp;
 674         char *from;
 675
 676         ast_log(LOG_DEBUG, "The client is %s\n", client->name);
 677         /* find corresponding call */
 678         for (tmp = client->p; tmp; tmp = tmp->next) {
 679                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
 680                         break;
 681         }
 682
 683         from = iks_find_attrib(pak->x, "to");
 684         if(!from)
 685                 from = client->connection->jid->full;
 686
 687         if (!tmp)
 688                 ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
 689
 690         /* answer 'iq' packet to let the remote peer know that we're alive */
 691         gtalk_response(client, from, pak, NULL, NULL);
 692         return 1;
 693 }
 694
 695 static int gtalk_handle_dtmf(struct gtalk *client, ikspak *pak)
 696 {
 697         struct gtalk_pvt *tmp;
 698         iks *dtmfnode = NULL, *dtmfchild = NULL;
 699         char *dtmf;
 700         char *from;
 701         /* Make sure our new call doesn't exist yet */
 702         for (tmp = client->p; tmp; tmp = tmp->next) {
 703                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) || iks_find_with_attrib(pak->x, "gtalk", "sid", tmp->sid))
 704                         break;
 705         }
 706         from = iks_find_attrib(pak->x, "to");
 707         if(!from)
 708                 from = client->connection->jid->full;
 709
 710
 711         if (tmp) {
 712                 if(iks_find_with_attrib(pak->x, "dtmf-method", "method", "rtp")) {
 713                         gtalk_response(client, from, pak,
 714                                         "feature-not-implemented xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'",
 715                                         "unsupported-dtmf-method xmlns='http://jabber.org/protocol/gtalk/info/dtmf#errors'");
 716                         return -1;
 717                 }
 718                 if ((dtmfnode = iks_find(pak->x, "dtmf"))) {
 719                         if((dtmf = iks_find_attrib(dtmfnode, "code"))) {
 720                                 if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-up")) {
 721                                         struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
 722                                         f.subclass = dtmf[0];
 723                                         ast_queue_frame(tmp->owner, &f);
 724                                         ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
 725                                 } else if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-down")) {
 726                                         struct ast_frame f = {AST_FRAME_DTMF_END, };
 727                                         f.subclass = dtmf[0];
 728                                         ast_queue_frame(tmp->owner, &f);
 729                                         ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
 730                                 } else if(iks_find_attrib(pak->x, "dtmf")) { /* 250 millasecond default */
 731                                         struct ast_frame f = {AST_FRAME_DTMF, };
 732                                         f.subclass = dtmf[0];
 733                                         ast_queue_frame(tmp->owner, &f);
 734                                         ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
 735                                 }
 736                         }
 737                 } else if ((dtmfnode = iks_find_with_attrib(pak->x, "gtalk", "action", "session-info"))) {
 738                         if((dtmfchild = iks_find(dtmfnode, "dtmf"))) {
 739                                 if((dtmf = iks_find_attrib(dtmfchild, "code"))) {
 740                                         if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-up")) {
 741                                                 struct ast_frame f = {AST_FRAME_DTMF_END, };
 742                                                 f.subclass = dtmf[0];
 743                                                 ast_queue_frame(tmp->owner, &f);
 744                                                 ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
 745                                         } else if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-down")) {
 746                                                 struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
 747                                                 f.subclass = dtmf[0];
 748                                                 ast_queue_frame(tmp->owner, &f);
 749                                                 ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
 750                                         }
 751                                 }
 752                         }
 753                 }
 754                 gtalk_response(client, from, pak, NULL, NULL);
 755                 return 1;
 756         } else
 757                 ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
 758
 759         gtalk_response(client, from, pak, NULL, NULL);
 760         return 1;
 761 }
 762
 763 static int gtalk_hangup_farend(struct gtalk *client, ikspak *pak)
 764 {
 765         struct gtalk_pvt *tmp;
 766         char *from;
 767
 768         ast_log(LOG_DEBUG, "The client is %s\n", client->name);
 769         /* Make sure our new call doesn't exist yet */
 770         for (tmp = client->p; tmp; tmp = tmp->next) {
 771                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
 772                         break;
 773         }
 774         from = iks_find_attrib(pak->x, "to");
 775         if(!from)
 776                 from = client->connection->jid->full;
 777
 778         if (tmp) {
 779                 tmp->alreadygone = 1;
 780                 if (tmp->owner)
 781                         ast_queue_hangup(tmp->owner);
 782         } else
 783                 ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
 784         gtalk_response(client, from, pak, NULL, NULL);
 785         return 1;
 786 }
 787
 788 static int gtalk_create_candidates(struct gtalk *client, struct gtalk_pvt *p, char *sid, char *from, char *to)
 789 {
 790         struct gtalk_candidate *tmp;
 791         struct aji_client *c = client->connection;
 792         struct gtalk_candidate *ours1 = NULL, *ours2 = NULL;
 793         struct sockaddr_in sin;
 794         struct sockaddr_in dest;
 795         struct in_addr us;
 796         iks *iq, *gtalk, *candidate, *transport;
 797         char user[17], pass[17], preference[5], port[7];
 798
 799
 800         iq = iks_new("iq");
 801         gtalk = iks_new("session");
 802         candidate = iks_new("candidate");
 803         transport = iks_new("transport");
 804         if (!iq || !gtalk || !candidate || !transport) {
 805                 ast_log(LOG_ERROR, "Memory allocation error\n");
 806                 goto safeout;
 807         }
 808         ours1 = ast_calloc(1, sizeof(*ours1));
 809         ours2 = ast_calloc(1, sizeof(*ours2));
 810         if (!ours1 || !ours2)
 811                 goto safeout;
 812
 813         iks_insert_attrib(transport, "xmlns","http://www.google.com/transport/p2p");
 814         iks_insert_node(iq, gtalk);
 815         iks_insert_node(gtalk,transport);
 816         iks_insert_node(transport, candidate);
 817
 818         for (; p; p = p->next) {
 819                 if (!strcasecmp(p->sid, sid))
 820                         break;
 821         }
 822
 823         if (!p) {
 824                 ast_log(LOG_NOTICE, "No matching gtalk session - SID %s!\n", sid);
 825                 goto safeout;
 826         }
 827
 828         ast_rtp_get_us(p->rtp, &sin);
 829         ast_find_ourip(&us, bindaddr);
 830
 831         /* Setup our gtalk candidates */
 832         ast_copy_string(ours1->name, "rtp", sizeof(ours1->name));
 833         ours1->port = ntohs(sin.sin_port);
 834         ours1->preference = 1;
 835         snprintf(user, sizeof(user), "%08lx%08lx", ast_random(), ast_random());
 836         snprintf(pass, sizeof(pass), "%08lx%08lx", ast_random(), ast_random());
 837         ast_copy_string(ours1->username, user, sizeof(ours1->username));
 838         ast_copy_string(ours1->password, pass, sizeof(ours1->password));
 839         ast_copy_string(ours1->ip, ast_inet_ntoa(us), sizeof(ours1->ip));
 840         ours1->protocol = AJI_PROTOCOL_UDP;
 841         ours1->type = AJI_CONNECT_LOCAL;
 842         ours1->generation = 0;
 843         p->ourcandidates = ours1;
 844
 845         if (!ast_strlen_zero(externip)) {
 846                 /* XXX We should really stun for this one not just go with externip XXX */
 847                 snprintf(user, sizeof(user), "%08lx%08lx", ast_random(), ast_random());
 848                 snprintf(pass, sizeof(pass), "%08lx%08lx", ast_random(), ast_random());
 849                 ast_copy_string(ours2->username, user, sizeof(ours2->username));
 850                 ast_copy_string(ours2->password, pass, sizeof(ours2->password));
 851                 ast_copy_string(ours2->ip, externip, sizeof(ours2->ip));
 852                 ast_copy_string(ours2->name, "rtp", sizeof(ours1->name));
 853                 ours2->port = ntohs(sin.sin_port);
 854                 ours2->preference = 0.9;
 855                 ours2->protocol = AJI_PROTOCOL_UDP;
 856                 ours2->type = AJI_CONNECT_STUN;
 857                 ours2->generation = 0;
 858                 ours1->next = ours2;
 859                 ours2 = NULL;
 860         }
 861         ours1 = NULL;
 862         dest.sin_addr = __ourip;
 863         dest.sin_port = sin.sin_port;
 864
 865
 866         for (tmp = p->ourcandidates; tmp; tmp = tmp->next) {
 867                 snprintf(port, sizeof(port), "%d", tmp->port);
 868                 snprintf(preference, sizeof(preference), "%.2f", tmp->preference);
 869                 iks_insert_attrib(iq, "from", to);
 870                 iks_insert_attrib(iq, "to", from);
 871                 iks_insert_attrib(iq, "type", "set");
 872                 iks_insert_attrib(iq, "id", c->mid);
 873                 ast_aji_increment_mid(c->mid);
 874                 iks_insert_attrib(gtalk, "type", "transport-info");
 875                 iks_insert_attrib(gtalk, "id", sid);
 876                 iks_insert_attrib(gtalk, "initiator", (p->initiator) ? to : from);
 877                 iks_insert_attrib(gtalk, "xmlns", GOOGLE_NS);
 878                 iks_insert_attrib(candidate, "name", tmp->name);
 879                 iks_insert_attrib(candidate, "address", tmp->ip);
 880                 iks_insert_attrib(candidate, "port", port);
 881                 iks_insert_attrib(candidate, "username", tmp->username);
 882                 iks_insert_attrib(candidate, "password", tmp->password);
 883                 iks_insert_attrib(candidate, "preference", preference);
 884                 if (tmp->protocol == AJI_PROTOCOL_UDP)
 885                         iks_insert_attrib(candidate, "protocol", "udp");
 886                 if (tmp->protocol == AJI_PROTOCOL_SSLTCP)
 887                         iks_insert_attrib(candidate, "protocol", "ssltcp");
 888                 if (tmp->type == AJI_CONNECT_STUN)
 889                         iks_insert_attrib(candidate, "type", "stun");
 890                 if (tmp->type == AJI_CONNECT_LOCAL)
 891                         iks_insert_attrib(candidate, "type", "local");
 892                 if (tmp->type == AJI_CONNECT_RELAY)
 893                         iks_insert_attrib(candidate, "type", "relay");
 894                 iks_insert_attrib(candidate, "network", "0");
 895                 iks_insert_attrib(candidate, "generation", "0");
 896                 iks_send(c->p, iq);
 897         }
 898         p->laststun = 0;
 899
 900 safeout:
 901         if (ours1)
 902                 free(ours1);
 903         if (ours2)
 904                 free(ours2);
 905         if (iq)
 906                 iks_delete(iq);
 907         if (gtalk)
 908                 iks_delete(gtalk);
 909         if (candidate)
 910                 iks_delete(candidate);
 911         if(transport)
 912                 iks_delete(transport);
 913         return 1;
 914 }
 915
 916 static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid)
 917 {
 918         struct gtalk_pvt *tmp = NULL;
 919         struct aji_resource *resources = NULL;
 920         struct aji_buddy *buddy;
 921         char idroster[200];
 922         char *data, *exten = NULL;
 923
 924         if (option_debug)
 925                 ast_log(LOG_DEBUG, "The client is %s for alloc\n", client->name);
 926         if (!sid && !strchr(them, '/')) {       /* I started call! */
 927                 if (!strcasecmp(client->name, "guest")) {
 928                         buddy = ASTOBJ_CONTAINER_FIND(&client->connection->buddies, them);
 929                         if (buddy)
 930                                 resources = buddy->resources;
 931                 } else if (client->buddy)
 932                         resources = client->buddy->resources;
 933                 while (resources) {
 934                         if (resources->cap->jingle) {
 935                                 break;
 936                         }
 937                         resources = resources->next;
 938                 }
 939                 if (resources)
 940                         snprintf(idroster, sizeof(idroster), "%s/%s", them, resources->resource);
 941                 else {
 942                         ast_log(LOG_ERROR, "no gtalk capable clients to talk to.\n");
 943                         return NULL;
 944                 }
 945         }
 946         if (!(tmp = ast_calloc(1, sizeof(*tmp)))) {
 947                 return NULL;
 948         }
 949         if (sid) {
 950                 ast_copy_string(tmp->sid, sid, sizeof(tmp->sid));
 951                 ast_copy_string(tmp->them, them, sizeof(tmp->them));
 952                 ast_copy_string(tmp->us, us, sizeof(tmp->us));
 953         } else {
 954                 snprintf(tmp->sid, sizeof(tmp->sid), "%08lx%08lx", ast_random(), ast_random());
 955                 ast_copy_string(tmp->them, idroster, sizeof(tmp->them));
 956                 ast_copy_string(tmp->us, us, sizeof(tmp->us));
 957                 tmp->initiator = 1;
 958         }
 959         /* clear codecs */
 960         tmp->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, bindaddr.sin_addr);
 961         ast_rtp_pt_clear(tmp->rtp);
 962
 963         /* add user configured codec capabilites */
 964         if (client->capability)
 965                 tmp->capability = client->capability;
 966         else if (global_capability)
 967                 tmp->capability = global_capability;
 968
 969         tmp->parent = client;
 970         if (!tmp->rtp) {
 971                 ast_log(LOG_WARNING, "Out of RTP sessions?\n");
 972                 free(tmp);
 973                 return NULL;
 974         }
 975
 976         /* Set CALLERID(name) to the full JID of the remote peer */
 977         ast_copy_string(tmp->cid_name, tmp->them, sizeof(tmp->cid_name));
 978
 979         if(strchr(tmp->us, '/')) {
 980                 data = ast_strdupa(tmp->us);
 981                 exten = strsep(&data, "/");
 982         } else
 983                 exten = tmp->us;
 984         ast_copy_string(tmp->exten,  exten, sizeof(tmp->exten));
 985         ast_mutex_init(&tmp->lock);
 986         ast_mutex_lock(&gtalklock);
 987         tmp->next = client->p;
 988         client->p = tmp;
 989         ast_mutex_unlock(&gtalklock);
 990         return tmp;
 991 }
 992
 993 /*! \brief Start new gtalk channel */
 994 static struct ast_channel *gtalk_new(struct gtalk *client, struct gtalk_pvt *i, int state, const char *title)
 995 {
 996         struct ast_channel *tmp;
 997         int fmt;
 998         int what;
 999         const char *n2;
1000
1001         if (title)
1002                 n2 = title;
1003         else
1004                 n2 = i->us;
1005         tmp = ast_channel_alloc(1, state, i->cid_num, i->cid_name, client->accountcode, i->exten, client->context, client->amaflags, "Gtalk/%s-%04lx", n2, ast_random() & 0xffff);
1006         if (!tmp) {
1007                 ast_log(LOG_WARNING, "Unable to allocate Gtalk channel structure!\n");
1008                 return NULL;
1009         }
1010         tmp->tech = &gtalk_tech;
1011
1012         /* Select our native format based on codec preference until we receive
1013            something from another device to the contrary. */
1014         if (i->jointcapability)
1015                 what = i->jointcapability;
1016         else if (i->capability)
1017                 what = i->capability;
1018         else
1019                 what = global_capability;
1020         tmp->nativeformats = ast_codec_choose(&i->prefs, what, 1) | (i->jointcapability & AST_FORMAT_VIDEO_MASK);
1021         fmt = ast_best_codec(tmp->nativeformats);
1022
1023         if (i->rtp) {
1024                 ast_rtp_setstun(i->rtp, 1);
1025                 tmp->fds[0] = ast_rtp_fd(i->rtp);
1026                 tmp->fds[1] = ast_rtcp_fd(i->rtp);
1027         }
1028         if (i->vrtp) {
1029                 ast_rtp_setstun(i->rtp, 1);
1030                 tmp->fds[2] = ast_rtp_fd(i->vrtp);
1031                 tmp->fds[3] = ast_rtcp_fd(i->vrtp);
1032         }
1033         if (state == AST_STATE_RING)
1034                 tmp->rings = 1;
1035         tmp->adsicpe = AST_ADSI_UNAVAILABLE;
1036         tmp->writeformat = fmt;
1037         tmp->rawwriteformat = fmt;
1038         tmp->readformat = fmt;
1039         tmp->rawreadformat = fmt;
1040         tmp->tech_pvt = i;
1041
1042         tmp->callgroup = client->callgroup;
1043         tmp->pickupgroup = client->pickupgroup;
1044         tmp->cid.cid_pres = client->callingpres;
1045         if (!ast_strlen_zero(client->accountcode))
1046                 ast_string_field_set(tmp, accountcode, client->accountcode);
1047         if (client->amaflags)
1048                 tmp->amaflags = client->amaflags;
1049         if (!ast_strlen_zero(client->language))
1050                 ast_string_field_set(tmp, language, client->language);
1051         if (!ast_strlen_zero(client->musicclass))
1052                 ast_string_field_set(tmp, musicclass, client->musicclass);
1053         i->owner = tmp;
1054         ast_module_ref(ast_module_info->self);
1055         ast_copy_string(tmp->context, client->context, sizeof(tmp->context));
1056         ast_copy_string(tmp->exten, i->exten, sizeof(tmp->exten));
1057
1058         if (!ast_strlen_zero(i->exten) && strcmp(i->exten, "s"))
1059                 tmp->cid.cid_dnid = ast_strdup(i->exten);
1060         tmp->priority = 1;
1061         if (i->rtp)
1062                 ast_jb_configure(tmp, &global_jbconf);
1063         if (state != AST_STATE_DOWN && ast_pbx_start(tmp)) {
1064                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
1065                 tmp->hangupcause = AST_CAUSE_SWITCH_CONGESTION;
1066                 ast_hangup(tmp);
1067                 tmp = NULL;
1068         }
1069
1070         return tmp;
1071 }
1072
1073 static int gtalk_action(struct gtalk *client, struct gtalk_pvt *p, const char *action)
1074 {
1075         iks *request, *session = NULL;
1076         int res = -1;
1077
1078         request = iks_new("iq");
1079         if (request) {
1080                 iks_insert_attrib(request, "type", "set");
1081                 iks_insert_attrib(request, "from", p->us);
1082                 iks_insert_attrib(request, "to", p->them);
1083                 iks_insert_attrib(request, "id", client->connection->mid);
1084                 ast_aji_increment_mid(client->connection->mid);
1085                 session = iks_new("session");
1086                 if (session) {
1087                         iks_insert_attrib(session, "type", action);
1088                         iks_insert_attrib(session, "id", p->sid);
1089                         iks_insert_attrib(session, "initiator", p->initiator ? p->us : p->them);
1090                         iks_insert_attrib(session, "xmlns", "http://www.google.com/session");
1091                         iks_insert_node(request, session);
1092                         iks_send(client->connection->p, request);
1093                         iks_delete(session);
1094                         res = 0;
1095                 }
1096                 iks_delete(request);
1097         }
1098         return res;
1099 }
1100
1101 static void gtalk_free_candidates(struct gtalk_candidate *candidate)
1102 {
1103         struct gtalk_candidate *last;
1104         while (candidate) {
1105                 last = candidate;
1106                 candidate = candidate->next;
1107                 free(last);
1108         }
1109 }
1110
1111 static void gtalk_free_pvt(struct gtalk *client, struct gtalk_pvt *p)
1112 {
1113         struct gtalk_pvt *cur, *prev = NULL;
1114         cur = client->p;
1115         while (cur) {
1116                 if (cur == p) {
1117                         if (prev)
1118                                 prev->next = p->next;
1119                         else
1120                                 client->p = p->next;
1121                         break;
1122                 }
1123                 prev = cur;
1124                 cur = cur->next;
1125         }
1126         if (p->ringrule)
1127                 iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
1128         if (p->owner)
1129                 ast_log(LOG_WARNING, "Uh oh, there's an owner, this is going to be messy.\n");
1130         if (p->rtp)
1131                 ast_rtp_destroy(p->rtp);
1132         if (p->vrtp)
1133                 ast_rtp_destroy(p->vrtp);
1134         gtalk_free_candidates(p->theircandidates);
1135         free(p);
1136 }
1137
1138
1139 static int gtalk_newcall(struct gtalk *client, ikspak *pak)
1140 {
1141         struct gtalk_pvt *p, *tmp = client->p;
1142         struct ast_channel *chan;
1143         int res;
1144         iks *codec;
1145         char *from = NULL;
1146         char s1[BUFSIZ], s2[BUFSIZ], s3[BUFSIZ];
1147         int peernoncodeccapability;
1148
1149         /* Make sure our new call doesn't exist yet */
1150         from = iks_find_attrib(pak->x,"to");
1151         if(!from)
1152                 from = client->connection->jid->full;
1153
1154         while (tmp) {
1155                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
1156                         ast_log(LOG_NOTICE, "Ignoring duplicate call setup on SID %s\n", tmp->sid);
1157                         gtalk_response(client, from, pak, "out-of-order", NULL);
1158                         return -1;
1159                 }
1160                 tmp = tmp->next;
1161         }
1162
1163         if (!strcasecmp(client->name, "guest")){
1164                 /* the guest account is not tied to any configured XMPP client,
1165                    let's set it now */
1166                 client->connection = ast_aji_get_client(from);
1167                 if (!client->connection) {
1168                         ast_log(LOG_ERROR, "No XMPP client to talk to, us (partial JID) : %s\n", from);
1169                         return -1;
1170                 }
1171         }
1172
1173         p = gtalk_alloc(client, from, pak->from->full, iks_find_attrib(pak->query, "id"));
1174         if (!p) {
1175                 ast_log(LOG_WARNING, "Unable to allocate gtalk structure!\n");
1176                 return -1;
1177         }
1178
1179         chan = gtalk_new(client, p, AST_STATE_DOWN, pak->from->user);
1180         if (!chan) {
1181                 gtalk_free_pvt(client, p);
1182                 return -1;
1183         }
1184
1185         ast_mutex_lock(&p->lock);
1186         ast_copy_string(p->them, pak->from->full, sizeof(p->them));
1187         if (iks_find_attrib(pak->query, "id")) {
1188                 ast_copy_string(p->sid, iks_find_attrib(pak->query, "id"),
1189                                 sizeof(p->sid));
1190         }
1191
1192         /* codec points to the first <payload-type/> tag */
1193         codec = iks_child(iks_child(iks_child(pak->x)));
1194
1195         while (codec) {
1196                 ast_rtp_set_m_type(p->rtp, atoi(iks_find_attrib(codec, "id")));
1197                 ast_rtp_set_rtpmap_type(p->rtp, atoi(iks_find_attrib(codec, "id")), "audio", iks_find_attrib(codec, "name"), 0);
1198                 codec = iks_next(codec);
1199         }
1200
1201         /* Now gather all of the codecs that we are asked for */
1202         ast_rtp_get_current_formats(p->rtp, &p->peercapability, &peernoncodeccapability);
1203         p->jointcapability = p->capability & p->peercapability;
1204         ast_mutex_unlock(&p->lock);
1205
1206         ast_setstate(chan, AST_STATE_RING);
1207         if (!p->jointcapability) {
1208                 ast_log(LOG_WARNING, "Capabilities don't match : us - %s, peer - %s, combined - %s \n", ast_getformatname_multiple(s1, BUFSIZ, p->capability),
1209                         ast_getformatname_multiple(s2, BUFSIZ, p->peercapability),
1210                         ast_getformatname_multiple(s3, BUFSIZ, p->jointcapability));
1211                 /* close session if capabilities don't match */
1212                 gtalk_action(client, p, "reject");
1213                 p->alreadygone = 1;
1214                 gtalk_hangup(chan);
1215                 ast_channel_free(chan);
1216                 return -1;
1217         }
1218
1219         res = ast_pbx_start(chan);
1220
1221         switch (res) {
1222         case AST_PBX_FAILED:
1223                 ast_log(LOG_WARNING, "Failed to start PBX :(\n");
1224                 gtalk_response(client, from, pak, "service-unavailable", NULL);
1225                 break;
1226         case AST_PBX_CALL_LIMIT:
1227                 ast_log(LOG_WARNING, "Failed to start PBX (call limit reached) \n");
1228                 gtalk_response(client, from, pak, "service-unavailable", NULL);
1229                 break;
1230         case AST_PBX_SUCCESS:
1231                 gtalk_response(client, from, pak, NULL, NULL);
1232                 gtalk_invite_response(p, p->them, p->us,p->sid, 0);
1233                 gtalk_create_candidates(client, p, p->sid, p->them, p->us);
1234                 /* nothing to do */
1235                 break;
1236         }
1237
1238         return 1;
1239 }
1240
1241 static int gtalk_update_stun(struct gtalk *client, struct gtalk_pvt *p)
1242 {
1243         struct gtalk_candidate *tmp;
1244         struct hostent *hp;
1245         struct ast_hostent ahp;
1246         struct sockaddr_in sin;
1247         struct sockaddr_in aux;
1248
1249         if (time(NULL) == p->laststun)
1250                 return 0;
1251
1252         tmp = p->theircandidates;
1253         p->laststun = time(NULL);
1254         while (tmp) {
1255                 char username[256];
1256
1257                 /* Find the IP address of the host */
1258                 hp = ast_gethostbyname(tmp->ip, &ahp);
1259                 sin.sin_family = AF_INET;
1260                 memcpy(&sin.sin_addr, hp->h_addr, sizeof(sin.sin_addr));
1261                 sin.sin_port = htons(tmp->port);
1262                 snprintf(username, sizeof(username), "%s%s", tmp->username,
1263                          p->ourcandidates->username);
1264
1265                 /* Find out the result of the STUN */
1266                 ast_rtp_get_peer(p->rtp, &aux);
1267
1268                 /* If the STUN result is different from the IP of the hostname,
1269                         lock on the stun IP of the hostname advertised by the
1270                         remote client */
1271                 if (aux.sin_addr.s_addr &&
1272                     aux.sin_addr.s_addr != sin.sin_addr.s_addr)
1273                         ast_rtp_stun_request(p->rtp, &aux, username);
1274                 else
1275                         ast_rtp_stun_request(p->rtp, &sin, username);
1276
1277                 if (aux.sin_addr.s_addr && option_debug > 3) {
1278                         ast_log(LOG_DEBUG, "Receiving RTP traffic from IP %s, matches with remote candidate's IP %s\n", ast_inet_ntoa(aux.sin_addr), tmp->ip);
1279                         ast_log(LOG_DEBUG, "Sending STUN request to %s\n", tmp->ip);
1280                 }
1281
1282                 tmp = tmp->next;
1283         }
1284         return 1;
1285 }
1286
1287 static int gtalk_add_candidate(struct gtalk *client, ikspak *pak)
1288 {
1289         struct gtalk_pvt *p = NULL, *tmp = NULL;
1290         struct aji_client *c = client->connection;
1291         struct gtalk_candidate *newcandidate = NULL;
1292         iks *traversenodes = NULL, *receipt = NULL;
1293         char *from;
1294
1295         from = iks_find_attrib(pak->x,"to");
1296         if(!from)
1297                 from = c->jid->full;
1298
1299         for (tmp = client->p; tmp; tmp = tmp->next) {
1300                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
1301                         p = tmp;
1302                         break;
1303                 }
1304         }
1305
1306         if (!p)
1307                 return -1;
1308
1309         traversenodes = pak->query;
1310         while(traversenodes) {
1311                 if(!strcasecmp(iks_name(traversenodes), "session")) {
1312                         traversenodes = iks_child(traversenodes);
1313                         continue;
1314                 }
1315                 if(!strcasecmp(iks_name(traversenodes), "transport")) {
1316                         traversenodes = iks_child(traversenodes);
1317                         continue;
1318                 }
1319                 if(!strcasecmp(iks_name(traversenodes), "candidate")) {
1320                         newcandidate = ast_calloc(1, sizeof(*newcandidate));
1321                         if (!newcandidate)
1322                                 return 0;
1323                         ast_copy_string(newcandidate->name, iks_find_attrib(traversenodes, "name"),
1324                                                         sizeof(newcandidate->name));
1325                         ast_copy_string(newcandidate->ip, iks_find_attrib(traversenodes, "address"),
1326                                                         sizeof(newcandidate->ip));
1327                         newcandidate->port = atoi(iks_find_attrib(traversenodes, "port"));
1328                         ast_copy_string(newcandidate->username, iks_find_attrib(traversenodes, "username"),
1329                                                         sizeof(newcandidate->username));
1330                         ast_copy_string(newcandidate->password, iks_find_attrib(traversenodes, "password"),
1331                                                         sizeof(newcandidate->password));
1332                         newcandidate->preference = atof(iks_find_attrib(traversenodes, "preference"));
1333                         if (!strcasecmp(iks_find_attrib(traversenodes, "protocol"), "udp"))
1334                                 newcandidate->protocol = AJI_PROTOCOL_UDP;
1335                         if (!strcasecmp(iks_find_attrib(traversenodes, "protocol"), "ssltcp"))
1336                                 newcandidate->protocol = AJI_PROTOCOL_SSLTCP;
1337
1338                         if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "stun"))
1339                                 newcandidate->type = AJI_CONNECT_STUN;
1340                         if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "local"))
1341                                 newcandidate->type = AJI_CONNECT_LOCAL;
1342                         if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "relay"))
1343                                 newcandidate->type = AJI_CONNECT_RELAY;
1344                         ast_copy_string(newcandidate->network, iks_find_attrib(traversenodes, "network"),
1345                                                         sizeof(newcandidate->network));
1346                         newcandidate->generation = atoi(iks_find_attrib(traversenodes, "generation"));
1347                         newcandidate->next = NULL;
1348
1349                         newcandidate->next = p->theircandidates;
1350                         p->theircandidates = newcandidate;
1351                         p->laststun = 0;
1352                         gtalk_update_stun(p->parent, p);
1353                         newcandidate = NULL;
1354                 }
1355                 traversenodes = iks_next(traversenodes);
1356         }
1357
1358         receipt = iks_new("iq");
1359         iks_insert_attrib(receipt, "type", "result");
1360         iks_insert_attrib(receipt, "from", from);
1361         iks_insert_attrib(receipt, "to", iks_find_attrib(pak->x, "from"));
1362         iks_insert_attrib(receipt, "id", iks_find_attrib(pak->x, "id"));
1363         iks_send(c->p, receipt);
1364         iks_delete(receipt);
1365
1366         return 1;
1367 }
1368
1369 static struct ast_frame *gtalk_rtp_read(struct ast_channel *ast, struct gtalk_pvt *p)
1370 {
1371         struct ast_frame *f;
1372
1373         if (!p->rtp)
1374                 return &ast_null_frame;
1375         f = ast_rtp_read(p->rtp);
1376         gtalk_update_stun(p->parent, p);
1377         if (p->owner) {
1378                 /* We already hold the channel lock */
1379                 if (f->frametype == AST_FRAME_VOICE) {
1380                         if (f->subclass != (p->owner->nativeformats & AST_FORMAT_AUDIO_MASK)) {
1381                                 if (option_debug)
1382                                         ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
1383                                 p->owner->nativeformats =
1384                                         (p->owner->nativeformats & AST_FORMAT_VIDEO_MASK) | f->subclass;
1385                                 ast_set_read_format(p->owner, p->owner->readformat);
1386                                 ast_set_write_format(p->owner, p->owner->writeformat);
1387                         }
1388 /*                      if ((ast_test_flag(p, SIP_DTMF) == SIP_DTMF_INBAND) && p->vad) {
1389                                 f = ast_dsp_process(p->owner, p->vad, f);
1390                                 if (option_debug && f && (f->frametype == AST_FRAME_DTMF))
1391                                         ast_log(LOG_DEBUG, "* Detected inband DTMF '%c'\n", f->subclass);
1392                         } */
1393                 }
1394         }
1395         return f;
1396 }
1397
1398 static struct ast_frame *gtalk_read(struct ast_channel *ast)
1399 {
1400         struct ast_frame *fr;
1401         struct gtalk_pvt *p = ast->tech_pvt;
1402
1403         ast_mutex_lock(&p->lock);
1404         fr = gtalk_rtp_read(ast, p);
1405         ast_mutex_unlock(&p->lock);
1406         return fr;
1407 }
1408
1409 /*! \brief Send frame to media channel (rtp) */
1410 static int gtalk_write(struct ast_channel *ast, struct ast_frame *frame)
1411 {
1412         struct gtalk_pvt *p = ast->tech_pvt;
1413         int res = 0;
1414
1415         switch (frame->frametype) {
1416         case AST_FRAME_VOICE:
1417                 if (!(frame->subclass & ast->nativeformats)) {
1418                         ast_log(LOG_WARNING,
1419                                         "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
1420                                         frame->subclass, ast->nativeformats, ast->readformat,
1421                                         ast->writeformat);
1422                         return 0;
1423                 }
1424                 if (p) {
1425                         ast_mutex_lock(&p->lock);
1426                         if (p->rtp) {
1427                                 res = ast_rtp_write(p->rtp, frame);
1428                         }
1429                         ast_mutex_unlock(&p->lock);
1430                 }
1431                 break;
1432         case AST_FRAME_VIDEO:
1433                 if (p) {
1434                         ast_mutex_lock(&p->lock);
1435                         if (p->vrtp) {
1436                                 res = ast_rtp_write(p->vrtp, frame);
1437                         }
1438                         ast_mutex_unlock(&p->lock);
1439                 }
1440                 break;
1441         case AST_FRAME_IMAGE:
1442                 return 0;
1443                 break;
1444         default:
1445                 ast_log(LOG_WARNING, "Can't send %d type frames with Gtalk write\n",
1446                                 frame->frametype);
1447                 return 0;
1448         }
1449
1450         return res;
1451 }
1452
1453 static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
1454 {
1455         struct gtalk_pvt *p = newchan->tech_pvt;
1456         ast_mutex_lock(&p->lock);
1457
1458         if ((p->owner != oldchan)) {
1459                 ast_mutex_unlock(&p->lock);
1460                 return -1;
1461         }
1462         if (p->owner == oldchan)
1463                 p->owner = newchan;
1464         ast_mutex_unlock(&p->lock);
1465         return 0;
1466 }
1467
1468 static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen)
1469 {
1470         int res = 0;
1471
1472         switch (condition) {
1473         case AST_CONTROL_HOLD:
1474                 ast_moh_start(ast, data, NULL);
1475                 break;
1476         case AST_CONTROL_UNHOLD:
1477                 ast_moh_stop(ast);
1478                 break;
1479         default:
1480                 ast_log(LOG_NOTICE, "Don't know how to indicate condition '%d'\n", condition);
1481                 res = -1;
1482         }
1483
1484         return res;
1485 }
1486
1487 static int gtalk_digit_begin(struct ast_channel *chan, char digit)
1488 {
1489         return gtalk_digit(chan, digit, 0);
1490 }
1491
1492 static int gtalk_digit_end(struct ast_channel *chan, char digit, unsigned int duration)
1493 {
1494         return gtalk_digit(chan, digit, duration);
1495 }
1496
1497 static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration)
1498 {
1499         struct gtalk_pvt *p = ast->tech_pvt;
1500         struct gtalk *client = p->parent;
1501         iks *iq, *gtalk, *dtmf;
1502         char buffer[2] = {digit, '\0'};
1503         iq = iks_new("iq");
1504         gtalk = iks_new("gtalk");
1505         dtmf = iks_new("dtmf");
1506         if(!iq || !gtalk || !dtmf) {
1507                 if(iq)
1508                         iks_delete(iq);
1509                 if(gtalk)
1510                         iks_delete(gtalk);
1511                 if(dtmf)
1512                         iks_delete(dtmf);
1513                 ast_log(LOG_ERROR, "Did not send dtmf do to memory issue\n");
1514                 return -1;
1515         }
1516
1517         iks_insert_attrib(iq, "type", "set");
1518         iks_insert_attrib(iq, "to", p->them);
1519         iks_insert_attrib(iq, "from", p->us);
1520         iks_insert_attrib(iq, "id", client->connection->mid);
1521         ast_aji_increment_mid(client->connection->mid);
1522         iks_insert_attrib(gtalk, "xmlns", "http://jabber.org/protocol/gtalk");
1523         iks_insert_attrib(gtalk, "action", "session-info");
1524         iks_insert_attrib(gtalk, "initiator", p->initiator ? p->us: p->them);
1525         iks_insert_attrib(gtalk, "sid", p->sid);
1526         iks_insert_attrib(dtmf, "xmlns", "http://jabber.org/protocol/gtalk/info/dtmf");
1527         iks_insert_attrib(dtmf, "code", buffer);
1528         iks_insert_node(iq, gtalk);
1529         iks_insert_node(gtalk, dtmf);
1530
1531         ast_mutex_lock(&p->lock);
1532         if (ast->dtmff.frametype == AST_FRAME_DTMF_BEGIN || duration == 0) {
1533                 iks_insert_attrib(dtmf, "action", "button-down");
1534         } else if (ast->dtmff.frametype == AST_FRAME_DTMF_END || duration != 0) {
1535                 iks_insert_attrib(dtmf, "action", "button-up");
1536         }
1537         iks_send(client->connection->p, iq);
1538         iks_delete(iq);
1539         iks_delete(gtalk);
1540         iks_delete(dtmf);
1541         ast_mutex_unlock(&p->lock);
1542         return 0;
1543 }
1544
1545 static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen)
1546 {
1547         ast_log(LOG_NOTICE, "XXX Implement gtalk sendhtml XXX\n");
1548
1549         return -1;
1550 }
1551
1552 /* Not in use right now.
1553 static int gtalk_auto_congest(void *nothing)
1554 {
1555         struct gtalk_pvt *p = nothing;
1556
1557         ast_mutex_lock(&p->lock);
1558         if (p->owner) {
1559                 if (!ast_channel_trylock(p->owner)) {
1560                         ast_log(LOG_NOTICE, "Auto-congesting %s\n", p->owner->name);
1561                         ast_queue_control(p->owner, AST_CONTROL_CONGESTION);
1562                         ast_channel_unlock(p->owner);
1563                 }
1564         }
1565         ast_mutex_unlock(&p->lock);
1566         return 0;
1567 }
1568 */
1569
1570 /*! \brief Initiate new call, part of PBX interface
1571  *      dest is the dial string */
1572 static int gtalk_call(struct ast_channel *ast, char *dest, int timeout)
1573 {
1574         struct gtalk_pvt *p = ast->tech_pvt;
1575
1576         if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
1577                 ast_log(LOG_WARNING, "gtalk_call called on %s, neither down nor reserved\n", ast->name);
1578                 return -1;
1579         }
1580
1581         ast_setstate(ast, AST_STATE_RING);
1582         if (!p->ringrule) {
1583                 ast_copy_string(p->ring, p->parent->connection->mid, sizeof(p->ring));
1584                 p->ringrule = iks_filter_add_rule(p->parent->connection->f, gtalk_ringing_ack, p,
1585                                                         IKS_RULE_ID, p->ring, IKS_RULE_DONE);
1586         } else
1587                 ast_log(LOG_WARNING, "Whoa, already have a ring rule!\n");
1588
1589         gtalk_invite(p, p->them, p->us, p->sid, 1);
1590         gtalk_create_candidates(p->parent, p, p->sid, p->them, p->us);
1591
1592         return 0;
1593 }
1594
1595 /*! \brief Hangup a call through the gtalk proxy channel */
1596 static int gtalk_hangup(struct ast_channel *ast)
1597 {
1598         struct gtalk_pvt *p = ast->tech_pvt;
1599         struct gtalk *client;
1600
1601         ast_mutex_lock(&p->lock);
1602         client = p->parent;
1603         p->owner = NULL;
1604         ast->tech_pvt = NULL;
1605         if (!p->alreadygone)
1606                 gtalk_action(client, p, "terminate");
1607         ast_mutex_unlock(&p->lock);
1608
1609         gtalk_free_pvt(client, p);
1610         ast_module_unref(ast_module_info->self);
1611
1612         return 0;
1613 }
1614
1615 /*! \brief Part of PBX interface */
1616 static struct ast_channel *gtalk_request(const char *type, int format, void *data, int *cause)
1617 {
1618         struct gtalk_pvt *p = NULL;
1619         struct gtalk *client = NULL;
1620         char *sender = NULL, *to = NULL, *s = NULL;
1621         struct ast_channel *chan = NULL;
1622
1623         if (data) {
1624                 s = ast_strdupa(data);
1625                 if (s) {
1626                         sender = strsep(&s, "/");
1627                         if (sender && (sender[0] != '\0'))
1628                                 to = strsep(&s, "/");
1629                         if (!to) {
1630                                 ast_log(LOG_ERROR, "Bad arguments in Gtalk Dialstring: %s\n", (char*) data);
1631                                 return NULL;
1632                         }
1633                 }
1634         }
1635
1636         client = find_gtalk(to, sender);
1637         if (!client) {
1638                 ast_log(LOG_WARNING, "Could not find recipient.\n");
1639                 return NULL;
1640         }
1641         if (!strcasecmp(client->name, "guest")){
1642                 /* the guest account is not tied to any configured XMPP client,
1643                    let's set it now */
1644                 client->connection = ast_aji_get_client(sender);
1645                 if (!client->connection) {
1646                         ast_log(LOG_ERROR, "No XMPP client to talk to, us (partial JID) : %s\n", sender);
1647                         ASTOBJ_UNREF(client, gtalk_member_destroy);
1648                         return NULL;
1649                 }
1650         }
1651
1652         ASTOBJ_WRLOCK(client);
1653         p = gtalk_alloc(client, strchr(sender, '@') ? sender : client->connection->jid->full, strchr(to, '@') ? to : client->user, NULL);
1654         if (p)
1655                 chan = gtalk_new(client, p, AST_STATE_DOWN, to);
1656
1657         ASTOBJ_UNLOCK(client);
1658         return chan;
1659 }
1660
1661 /*! \brief CLI command "gtalk show channels" */
1662 static int gtalk_show_channels(int fd, int argc, char **argv)
1663 {
1664 #define FORMAT  "%-30.30s  %-30.30s  %-15.15s  %-5.5s %-5.5s \n"
1665         struct gtalk_pvt *p;
1666         struct ast_channel *chan;
1667         int numchans = 0;
1668         char them[AJI_MAX_JIDLEN];
1669         char *jid = NULL;
1670         char *resource = NULL;
1671
1672         if (argc != 3)
1673                 return RESULT_SHOWUSAGE;
1674
1675         ast_mutex_lock(&gtalklock);
1676         ast_cli(fd, FORMAT, "Channel", "Jabber ID", "Resource", "Read", "Write");
1677         ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
1678                 ASTOBJ_WRLOCK(iterator);
1679                 p = iterator->p;
1680                 while(p) {
1681                         chan = p->owner;
1682                         ast_copy_string(them, p->them, sizeof(them));
1683                         jid = them;
1684                         resource = strchr(them, '/');
1685                         if (!resource)
1686                                 resource = "None";
1687                         else {
1688                                 *resource = '\0';
1689                                 resource ++;
1690                         }
1691                         if (chan)
1692                                 ast_cli(fd, FORMAT,
1693                                         chan->name,
1694                                         jid,
1695                                         resource,
1696                                         ast_getformatname(chan->readformat),
1697                                         ast_getformatname(chan->writeformat)
1698                                         );
1699                         else
1700                                 ast_log(LOG_WARNING, "No available channel\n");
1701                         numchans ++;
1702                         p = p->next;
1703                 }
1704                 ASTOBJ_UNLOCK(iterator);
1705         });
1706
1707         ast_mutex_unlock(&gtalklock);
1708
1709         ast_cli(fd, "%d active gtalk channel%s\n", numchans, (numchans != 1) ? "s" : "");
1710         return RESULT_SUCCESS;
1711 #undef FORMAT
1712 }
1713
1714 /*! \brief CLI command "gtalk show channels" */
1715 static int gtalk_do_reload(int fd, int argc, char **argv)
1716 {
1717         ast_verbose("IT DOES WORK!\n");
1718         return RESULT_SUCCESS;
1719 }
1720
1721 static int gtalk_parser(void *data, ikspak *pak)
1722 {
1723         struct gtalk *client = ASTOBJ_REF((struct gtalk *) data);
1724
1725         if (iks_find_with_attrib(pak->x, "session", "type", "initiate")) {
1726                 /* New call */
1727                 gtalk_newcall(client, pak);
1728         } else if (iks_find_with_attrib(pak->x, "session", "type", "candidates") || iks_find_with_attrib(pak->x, "session", "type", "transport-info")) {
1729                 if (option_debug > 2)
1730                         ast_log(LOG_DEBUG, "About to add candidate!\n");
1731                 gtalk_add_candidate(client, pak);
1732                 if (option_debug > 2)
1733                         ast_log(LOG_DEBUG, "Candidate Added!\n");
1734         } else if (iks_find_with_attrib(pak->x, "session", "type", "accept")) {
1735                 gtalk_is_answered(client, pak);
1736         } else if (iks_find_with_attrib(pak->x, "session", "type", "transport-accept")) {
1737                 gtalk_is_accepted(client, pak);
1738         } else if (iks_find_with_attrib(pak->x, "session", "type", "content-info") || iks_find_with_attrib(pak->x, "gtalk", "action", "session-info")) {
1739                 gtalk_handle_dtmf(client, pak);
1740         } else if (iks_find_with_attrib(pak->x, "session", "type", "terminate")) {
1741                 gtalk_hangup_farend(client, pak);
1742         } else if (iks_find_with_attrib(pak->x, "session", "type", "reject")) {
1743                 gtalk_hangup_farend(client, pak);
1744         }
1745         ASTOBJ_UNREF(client, gtalk_member_destroy);
1746         return IKS_FILTER_EAT;
1747 }
1748
1749 /* Not using this anymore probably take out soon
1750 static struct gtalk_candidate *gtalk_create_candidate(char *args)
1751 {
1752         char *name, *type, *preference, *protocol;
1753         struct gtalk_candidate *res;
1754         res = malloc(sizeof(struct gtalk_candidate));
1755         memset(res, 0, sizeof(struct gtalk_candidate));
1756         if (args)
1757                 name = args;
1758         if ((args = strchr(args, ','))) {
1759                 *args = '\0';
1760                 args++;
1761                 preference = args;
1762         }
1763         if ((args = strchr(args, ','))) {
1764                 *args = '\0';
1765                 args++;
1766                 protocol = args;
1767         }
1768         if ((args = strchr(args, ','))) {
1769                 *args = '\0';
1770                 args++;
1771                 type = args;
1772         }
1773         if (name)
1774                 ast_copy_string(res->name, name, sizeof(res->name));
1775         if (preference) {
1776                 res->preference = atof(preference);
1777         }
1778         if (protocol) {
1779                 if (!strcasecmp("udp", protocol))
1780                         res->protocol = AJI_PROTOCOL_UDP;
1781                 if (!strcasecmp("ssltcp", protocol))
1782                         res->protocol = AJI_PROTOCOL_SSLTCP;
1783         }
1784         if (type) {
1785                 if (!strcasecmp("stun", type))
1786                         res->type = AJI_CONNECT_STUN;
1787                 if (!strcasecmp("local", type))
1788                         res->type = AJI_CONNECT_LOCAL;
1789                 if (!strcasecmp("relay", type))
1790                         res->type = AJI_CONNECT_RELAY;
1791         }
1792
1793         return res;
1794 }
1795 */
1796
1797 static int gtalk_create_member(char *label, struct ast_variable *var, int allowguest,
1798                                                                 struct ast_codec_pref prefs, char *context,
1799                                                                 struct gtalk *member)
1800 {
1801         struct aji_client *client;
1802
1803         if (!member)
1804                 ast_log(LOG_WARNING, "Out of memory.\n");
1805
1806         ast_copy_string(member->name, label, sizeof(member->name));
1807         ast_copy_string(member->user, label, sizeof(member->user));
1808         ast_copy_string(member->context, context, sizeof(member->context));
1809         member->allowguest = allowguest;
1810         member->prefs = prefs;
1811         while (var) {
1812 #if 0
1813                 struct gtalk_candidate *candidate = NULL;
1814 #endif
1815                 if (!strcasecmp(var->name, "username"))
1816                         ast_copy_string(member->user, var->value, sizeof(member->user));
1817                 else if (!strcasecmp(var->name, "disallow"))
1818                         ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 0);
1819                 else if (!strcasecmp(var->name, "allow"))
1820                         ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 1);
1821                 else if (!strcasecmp(var->name, "context"))
1822                         ast_copy_string(member->context, var->value, sizeof(member->context));
1823 #if 0
1824                 else if (!strcasecmp(var->name, "candidate")) {
1825                         candidate = gtalk_create_candidate(var->value);
1826                         if (candidate) {
1827                                 candidate->next = member->ourcandidates;
1828                                 member->ourcandidates = candidate;
1829                         }
1830                 }
1831 #endif
1832                 else if (!strcasecmp(var->name, "connection")) {
1833                         if ((client = ast_aji_get_client(var->value))) {
1834                                 member->connection = client;
1835                                 iks_filter_add_rule(client->f, gtalk_parser, member,
1836                                                     IKS_RULE_TYPE, IKS_PAK_IQ,
1837                                                     IKS_RULE_FROM_PARTIAL, member->user,
1838                                                     IKS_RULE_NS, "http://www.google.com/session",
1839                                                     IKS_RULE_DONE);
1840
1841                         } else {
1842                                 ast_log(LOG_ERROR, "connection referenced not found!\n");
1843                                 return 0;
1844                         }
1845                 }
1846                 var = var->next;
1847         }
1848         if (member->connection && member->user)
1849                 member->buddy = ASTOBJ_CONTAINER_FIND(&member->connection->buddies, member->user);
1850         else {
1851                 ast_log(LOG_ERROR, "No Connection or Username!\n");
1852         }
1853         return 1;
1854 }
1855
1856 static int gtalk_load_config(void)
1857 {
1858         char *cat = NULL;
1859         struct ast_config *cfg = NULL;
1860         char context[AST_MAX_CONTEXT];
1861         int allowguest = 1;
1862         struct ast_variable *var;
1863         struct gtalk *member;
1864         struct ast_codec_pref prefs;
1865         struct aji_client_container *clients;
1866         struct gtalk_candidate *global_candidates = NULL;
1867         struct hostent *hp;
1868         struct ast_hostent ahp;
1869
1870         cfg = ast_config_load(GOOGLE_CONFIG);
1871         if (!cfg)
1872                 return 0;
1873
1874         /* Copy the default jb config over global_jbconf */
1875         memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
1876
1877         cat = ast_category_browse(cfg, NULL);
1878         for (var = ast_variable_browse(cfg, "general"); var; var = var->next) {
1879                 /* handle jb conf */
1880                 if (!ast_jb_read_conf(&global_jbconf, var->name, var->value))
1881                         continue;
1882
1883                 if (!strcasecmp(var->name, "allowguest"))
1884                         allowguest =
1885                                 (ast_true(ast_variable_retrieve(cfg, "general", "allowguest"))) ? 1 : 0;
1886                 else if (!strcasecmp(var->name, "disallow"))
1887                         ast_parse_allow_disallow(&prefs, &global_capability, var->value, 0);
1888                 else if (!strcasecmp(var->name, "allow"))
1889                         ast_parse_allow_disallow(&prefs, &global_capability, var->value, 1);
1890                 else if (!strcasecmp(var->name, "context"))
1891                         ast_copy_string(context, var->value, sizeof(context));
1892                 else if (!strcasecmp(var->name, "bindaddr")) {
1893                         if (!(hp = ast_gethostbyname(var->value, &ahp))) {
1894                                 ast_log(LOG_WARNING, "Invalid address: %s\n", var->value);
1895                         } else {
1896                                 memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
1897                         }
1898                 }
1899 /*  Idea to allow for custom candidates  */
1900 /*
1901                 else if (!strcasecmp(var->name, "candidate")) {
1902                         candidate = gtalk_create_candidate(var->value);
1903                         if (candidate) {
1904                                 candidate->next = global_candidates;
1905                                 global_candidates = candidate;
1906                         }
1907                 }
1908 */
1909         }
1910         while (cat) {
1911                 if (strcasecmp(cat, "general")) {
1912                         var = ast_variable_browse(cfg, cat);
1913                         member = (struct gtalk *) malloc(sizeof(struct gtalk));
1914                         memset(member, 0, sizeof(struct gtalk));
1915                         ASTOBJ_INIT(member);
1916                         ASTOBJ_WRLOCK(member);
1917                         if (!strcasecmp(cat, "guest")) {
1918                                 ast_copy_string(member->name, "guest", sizeof(member->name));
1919                                 ast_copy_string(member->user, "guest", sizeof(member->user));
1920                                 ast_copy_string(member->context, context, sizeof(member->context));
1921                                 member->allowguest = allowguest;
1922                                 member->prefs = prefs;
1923                                 while (var) {
1924                                         if (!strcasecmp(var->name, "disallow"))
1925                                                 ast_parse_allow_disallow(&member->prefs, &member->capability,
1926                                                                                                  var->value, 0);
1927                                         else if (!strcasecmp(var->name, "allow"))
1928                                                 ast_parse_allow_disallow(&member->prefs, &member->capability,
1929                                                                                                  var->value, 1);
1930                                         else if (!strcasecmp(var->name, "context"))
1931                                                 ast_copy_string(member->context, var->value,
1932                                                                                 sizeof(member->context));
1933 /*  Idea to allow for custom candidates  */
1934 /*
1935                                         else if (!strcasecmp(var->name, "candidate")) {
1936                                                 candidate = gtalk_create_candidate(var->value);
1937                                                 if (candidate) {
1938                                                         candidate->next = member->ourcandidates;
1939                                                         member->ourcandidates = candidate;
1940                                                 }
1941                                         }
1942 */
1943                                         var = var->next;
1944                                 }
1945                                 ASTOBJ_UNLOCK(member);
1946                                 clients = ast_aji_get_clients();
1947                                 if (clients) {
1948                                         ASTOBJ_CONTAINER_TRAVERSE(clients, 1, {
1949                                                 ASTOBJ_WRLOCK(iterator);
1950                                                 ASTOBJ_WRLOCK(member);
1951                                                 member->connection = NULL;
1952                                                 iks_filter_add_rule(iterator->f, gtalk_parser, member, IKS_RULE_TYPE, IKS_PAK_IQ, IKS_RULE_NS, "http://www.google.com/session", IKS_RULE_DONE);
1953                                                 iks_filter_add_rule(iterator->f, gtalk_parser, member, IKS_RULE_TYPE, IKS_PAK_IQ, IKS_RULE_NS, "http://jabber.org/protocol/gtalk", IKS_RULE_DONE);
1954                                                 ASTOBJ_UNLOCK(member);
1955                                                 ASTOBJ_UNLOCK(iterator);
1956                                         });
1957                                         ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
1958                                         ASTOBJ_UNREF(member, gtalk_member_destroy);
1959                                 } else {
1960                                         ASTOBJ_UNLOCK(member);
1961                                         ASTOBJ_UNREF(member, gtalk_member_destroy);
1962                                 }
1963                         } else {
1964                                 ASTOBJ_UNLOCK(member);
1965                                 if (gtalk_create_member(cat, var, allowguest, prefs, context, member))
1966                                         ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
1967                                 ASTOBJ_UNREF(member, gtalk_member_destroy);
1968                         }
1969                 }
1970                 cat = ast_category_browse(cfg, cat);
1971         }
1972         gtalk_free_candidates(global_candidates);
1973         return 1;
1974 }
1975
1976 /*! \brief Load module into PBX, register channel */
1977 static int load_module(void)
1978 {
1979         char *jabber_loaded = ast_module_helper("", "res_jabber.so", 0, 0, 0, 0);
1980         free(jabber_loaded);
1981         if (!jabber_loaded) {
1982                 /* If embedded, check for a different module name */
1983                 jabber_loaded = ast_module_helper("", "res_jabber", 0, 0, 0, 0);
1984                 free(jabber_loaded);
1985                 if (!jabber_loaded) {
1986                         ast_log(LOG_ERROR, "chan_gtalk.so depends upon res_jabber.so\n");
1987                         return AST_MODULE_LOAD_DECLINE;
1988                 }
1989         }
1990
1991 #ifdef HAVE_GNUTLS
1992         gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
1993 #endif /* HAVE_GNUTLS */
1994
1995         ASTOBJ_CONTAINER_INIT(&gtalk_list);
1996         if (!gtalk_load_config()) {
1997                 ast_log(LOG_ERROR, "Unable to read config file %s. Not loading module.\n", GOOGLE_CONFIG);
1998                 return 0;
1999         }
2000
2001         sched = sched_context_create();
2002         if (!sched)
2003                 ast_log(LOG_WARNING, "Unable to create schedule context\n");
2004
2005         io = io_context_create();
2006         if (!io)
2007                 ast_log(LOG_WARNING, "Unable to create I/O context\n");
2008
2009         if (ast_find_ourip(&__ourip, bindaddr)) {
2010                 ast_log(LOG_WARNING, "Unable to get own IP address, Gtalk disabled\n");
2011                 return 0;
2012         }
2013
2014         ast_rtp_proto_register(&gtalk_rtp);
2015         ast_cli_register_multiple(gtalk_cli, sizeof(gtalk_cli) / sizeof(gtalk_cli[0]));
2016
2017         /* Make sure we can register our channel type */
2018         if (ast_channel_register(&gtalk_tech)) {
2019                 ast_log(LOG_ERROR, "Unable to register channel class %s\n", gtalk_tech.type);
2020                 return -1;
2021         }
2022         return 0;
2023 }
2024
2025 /*! \brief Reload module */
2026 static int reload(void)
2027 {
2028         return 0;
2029 }
2030
2031 /*! \brief Unload the gtalk channel from Asterisk */
2032 static int unload_module(void)
2033 {
2034         struct gtalk_pvt *privates = NULL;
2035         ast_cli_unregister_multiple(gtalk_cli, sizeof(gtalk_cli) / sizeof(gtalk_cli[0]));
2036         /* First, take us out of the channel loop */
2037         ast_channel_unregister(&gtalk_tech);
2038         ast_rtp_proto_unregister(&gtalk_rtp);
2039
2040         if (!ast_mutex_lock(&gtalklock)) {
2041                 /* Hangup all interfaces if they have an owner */
2042                 ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
2043                         ASTOBJ_WRLOCK(iterator);
2044                         privates = iterator->p;
2045                         while(privates) {
2046                                 if (privates->owner)
2047                                         ast_softhangup(privates->owner, AST_SOFTHANGUP_APPUNLOAD);
2048                                 privates = privates->next;
2049                         }
2050                         iterator->p = NULL;
2051                         ASTOBJ_UNLOCK(iterator);
2052                 });
2053                 ast_mutex_unlock(&gtalklock);
2054         } else {
2055                 ast_log(LOG_WARNING, "Unable to lock the monitor\n");
2056                 return -1;
2057         }
2058         ASTOBJ_CONTAINER_DESTROYALL(&gtalk_list, gtalk_member_destroy);
2059         ASTOBJ_CONTAINER_DESTROY(&gtalk_list);
2060         return 0;
2061 }
2062
2063 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Gtalk Channel Driver",
2064                 .load = load_module,
2065                 .unload = unload_module,
2066                 .reload = reload,
2067                );