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