channels/chan_gtalk.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 1999 - 2005, Digium, Inc.
   5  *
   6  * Matt O'Gorman <mogorman@digium.com>
   7  *
   8  * See http://www.asterisk.org for more information about
   9  * the Asterisk project. Please do not directly contact
  10  * any of the maintainers of this project for assistance;
  11  * the project provides a web site, mailing lists and IRC
  12  * channels for your use.
  13  *
  14  * This program is free software, distributed under the terms of
  15  * the GNU General Public License Version 2. See the LICENSE file
  16  * at the top of the source tree.
  17  */
  18
  19 /*! \file
  20  *
  21  * \author Matt O'Gorman <mogorman@digium.com>
  22  *
  23  * \brief Gtalk Channel Driver, until google/libjingle works with jingle spec
  24  *
  25  * \ingroup channel_drivers
  26  */
  27
  28 /*** MODULEINFO
  29         <depend>iksemel</depend>
  30         <depend>res_jabber</depend>
  31         <use>gnutls</use>
  32  ***/
  33
  34 #include "asterisk.h"
  35
  36 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  37
  38 #include <stdlib.h>
  39 #include <stdio.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42 #include <sys/socket.h>
  43 #include <errno.h>
  44 #include <stdlib.h>
  45 #include <fcntl.h>
  46 #include <netdb.h>
  47 #include <netinet/in.h>
  48 #include <arpa/inet.h>
  49 #include <sys/signal.h>
  50 #include <iksemel.h>
  51 #include <pthread.h>
  52
  53 #ifdef HAVE_GNUTLS
  54 #include <gcrypt.h>
  55 GCRY_THREAD_OPTION_PTHREAD_IMPL;
  56 #endif /* HAVE_GNUTLS */
  57
  58 #include "asterisk/lock.h"
  59 #include "asterisk/channel.h"
  60 #include "asterisk/config.h"
  61 #include "asterisk/logger.h"
  62 #include "asterisk/module.h"
  63 #include "asterisk/pbx.h"
  64 #include "asterisk/options.h"
  65 #include "asterisk/lock.h"
  66 #include "asterisk/sched.h"
  67 #include "asterisk/io.h"
  68 #include "asterisk/rtp.h"
  69 #include "asterisk/acl.h"
  70 #include "asterisk/callerid.h"
  71 #include "asterisk/file.h"
  72 #include "asterisk/cli.h"
  73 #include "asterisk/app.h"
  74 #include "asterisk/musiconhold.h"
  75 #include "asterisk/manager.h"
  76 #include "asterisk/stringfields.h"
  77 #include "asterisk/utils.h"
  78 #include "asterisk/causes.h"
  79 #include "asterisk/astobj.h"
  80 #include "asterisk/abstract_jb.h"
  81 #include "asterisk/jabber.h"
  82
  83 #define GOOGLE_CONFIG "gtalk.conf"
  84
  85 #define GOOGLE_NS "http://www.google.com/session"
  86
  87
  88 /*! Global jitterbuffer configuration - by default, jb is disabled */
  89 static struct ast_jb_conf default_jbconf =
  90 {
  91         .flags = 0,
  92         .max_size = -1,
  93         .resync_threshold = -1,
  94         .impl = ""
  95 };
  96 static struct ast_jb_conf global_jbconf;
  97
  98 enum gtalk_protocol {
  99         AJI_PROTOCOL_UDP = 1,
 100         AJI_PROTOCOL_SSLTCP = 2,
 101 };
 102
 103 enum gtalk_connect_type {
 104         AJI_CONNECT_STUN = 1,
 105         AJI_CONNECT_LOCAL = 2,
 106         AJI_CONNECT_RELAY = 3,
 107 };
 108
 109 struct gtalk_pvt {
 110         ast_mutex_t lock;                /*!< Channel private lock */
 111         time_t laststun;
 112         struct gtalk *parent;            /*!< Parent client */
 113         char sid[100];
 114         char us[AJI_MAX_JIDLEN];
 115         char them[AJI_MAX_JIDLEN];
 116         char ring[10];                   /*!< Message ID of ring */
 117         iksrule *ringrule;               /*!< Rule for matching RING request */
 118         int initiator;                   /*!< If we're the initiator */
 119         int alreadygone;
 120         int capability;
 121         struct ast_codec_pref prefs;
 122         struct gtalk_candidate *theircandidates;
 123         struct gtalk_candidate *ourcandidates;
 124         char cid_num[80];                /*!< Caller ID num */
 125         char cid_name[80];               /*!< Caller ID name */
 126         char exten[80];                  /*!< Called extension */
 127         struct ast_channel *owner;       /*!< Master Channel */
 128         struct ast_rtp *rtp;             /*!< RTP audio session */
 129         struct ast_rtp *vrtp;            /*!< RTP video session */
 130         int jointcapability;             /*!< Supported capability at both ends (codecs ) */
 131         int peercapability;
 132         struct gtalk_pvt *next; /* Next entity */
 133 };
 134
 135 struct gtalk_candidate {
 136         char name[100];
 137         enum gtalk_protocol protocol;
 138         double preference;
 139         char username[100];
 140         char password[100];
 141         enum gtalk_connect_type type;
 142         char network[6];
 143         int generation;
 144         char ip[16];
 145         int port;
 146         int receipt;
 147         struct gtalk_candidate *next;
 148 };
 149
 150 struct gtalk {
 151         ASTOBJ_COMPONENTS(struct gtalk);
 152         struct aji_client *connection;
 153         struct aji_buddy *buddy;
 154         struct gtalk_pvt *p;
 155         struct ast_codec_pref prefs;
 156         int amaflags;                   /*!< AMA Flags */
 157         char user[AJI_MAX_JIDLEN];
 158         char context[AST_MAX_CONTEXT];
 159         char accountcode[AST_MAX_ACCOUNT_CODE]; /*!< Account code */
 160         int capability;
 161         ast_group_t callgroup;  /*!< Call group */
 162         ast_group_t pickupgroup;        /*!< Pickup group */
 163         int callingpres;                /*!< Calling presentation */
 164         int allowguest;
 165         char language[MAX_LANGUAGE];    /*!<  Default language for prompts */
 166         char musicclass[MAX_MUSICCLASS];        /*!<  Music on Hold class */
 167 };
 168
 169 struct gtalk_container {
 170         ASTOBJ_CONTAINER_COMPONENTS(struct gtalk);
 171 };
 172
 173 static const char desc[] = "Gtalk Channel";
 174
 175 static int global_capability = AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_GSM | AST_FORMAT_H263;
 176
 177 AST_MUTEX_DEFINE_STATIC(gtalklock); /*!< Protect the interface list (of gtalk_pvt's) */
 178
 179 /* Forward declarations */
 180 static struct ast_channel *gtalk_request(const char *type, int format, void *data, int *cause);
 181 static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration);
 182 static int gtalk_digit_begin(struct ast_channel *ast, char digit);
 183 static int gtalk_digit_end(struct ast_channel *ast, char digit, unsigned int duration);
 184 static int gtalk_call(struct ast_channel *ast, char *dest, int timeout);
 185 static int gtalk_hangup(struct ast_channel *ast);
 186 static int gtalk_answer(struct ast_channel *ast);
 187 static int gtalk_action(struct gtalk *client, struct gtalk_pvt *p, const char *action);
 188 static void gtalk_free_pvt(struct gtalk *client, struct gtalk_pvt *p);
 189 static int gtalk_newcall(struct gtalk *client, ikspak *pak);
 190 static struct ast_frame *gtalk_read(struct ast_channel *ast);
 191 static int gtalk_write(struct ast_channel *ast, struct ast_frame *f);
 192 static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen);
 193 static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
 194 static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen);
 195 static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid);
 196 static int gtalk_do_reload(int fd, int argc, char **argv);
 197 static int gtalk_show_channels(int fd, int argc, char **argv);
 198 /*----- RTP interface functions */
 199 static int gtalk_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp,
 200                                                            struct ast_rtp *vrtp, int codecs, int nat_active);
 201 static enum ast_rtp_get_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp);
 202 static int gtalk_get_codec(struct ast_channel *chan);
 203
 204 /*! \brief PBX interface structure for channel registration */
 205 static const struct ast_channel_tech gtalk_tech = {
 206         .type = "Gtalk",
 207         .description = "Gtalk Channel Driver",
 208         .capabilities = ((AST_FORMAT_MAX_AUDIO << 1) - 1),
 209         .requester = gtalk_request,
 210         .send_digit_begin = gtalk_digit_begin,
 211         .send_digit_end = gtalk_digit_end,
 212         .bridge = ast_rtp_bridge,
 213         .call = gtalk_call,
 214         .hangup = gtalk_hangup,
 215         .answer = gtalk_answer,
 216         .read = gtalk_read,
 217         .write = gtalk_write,
 218         .exception = gtalk_read,
 219         .indicate = gtalk_indicate,
 220         .fixup = gtalk_fixup,
 221         .send_html = gtalk_sendhtml,
 222         .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER
 223 };
 224
 225 static struct sockaddr_in bindaddr = { 0, };    /*!< The address we bind to */
 226
 227 static struct sched_context *sched;     /*!< The scheduling context */
 228 static struct io_context *io;   /*!< The IO context */
 229 static struct in_addr __ourip;
 230
 231
 232 /*! \brief RTP driver interface */
 233 static struct ast_rtp_protocol gtalk_rtp = {
 234         type: "Gtalk",
 235         get_rtp_info: gtalk_get_rtp_peer,
 236         set_rtp_peer: gtalk_set_rtp_peer,
 237         get_codec: gtalk_get_codec,
 238 };
 239
 240 static char show_channels_usage[] =
 241 "Usage: gtalk show channels\n"
 242 "       Shows current state of the Gtalk channels.\n";
 243
 244 static char reload_usage[] =
 245 "Usage: gtalk reload\n"
 246 "       Reload gtalk channel driver.\n";
 247
 248
 249 static struct ast_cli_entry gtalk_cli[] = {
 250         {{ "gtalk", "reload", NULL}, gtalk_do_reload, "Reload GoogleTalk configuration", reload_usage },
 251         {{ "gtalk", "show", "channels", NULL}, gtalk_show_channels, "Show GoogleTalk channels", show_channels_usage },
 252  };
 253
 254
 255
 256 static char externip[16];
 257
 258 static struct gtalk_container gtalk_list;
 259
 260 static void gtalk_member_destroy(struct gtalk *obj)
 261 {
 262         free(obj);
 263 }
 264
 265 static struct gtalk *find_gtalk(char *name, char *connection)
 266 {
 267         struct gtalk *gtalk = NULL;
 268         char *domain = NULL , *s = NULL;
 269
 270         if(strchr(connection, '@')) {
 271                 s = ast_strdupa(connection);
 272                 domain = strsep(&s, "@");
 273                 ast_verbose("OOOOH domain = %s\n", domain);
 274         }
 275         gtalk = ASTOBJ_CONTAINER_FIND(&gtalk_list, name);
 276         if (!gtalk && strchr(name, '@'))
 277                 gtalk = ASTOBJ_CONTAINER_FIND_FULL(&gtalk_list, name, user,,, strcasecmp);
 278
 279         if (!gtalk) {                           /* guest call */
 280                 ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
 281                         ASTOBJ_RDLOCK(iterator);
 282                         if (!strcasecmp(iterator->name, "guest")) {
 283                                 if (!strcasecmp(iterator->connection->jid->partial, connection)) {
 284                                         gtalk = iterator;
 285                                 } else if (!strcasecmp(iterator->connection->name, connection)) {
 286                                         gtalk = iterator;
 287                                 } else if (iterator->connection->component && !strcasecmp(iterator->connection->user,domain)) {
 288                                         gtalk = iterator;
 289                                 }
 290                         }
 291                         ASTOBJ_UNLOCK(iterator);
 292
 293                         if (gtalk)
 294                                 break;
 295                 });
 296
 297         }
 298         return gtalk;
 299 }
 300
 301
 302 static int add_codec_to_answer(const struct gtalk_pvt *p, int codec, iks *dcodecs)
 303 {
 304         int res = 0;
 305         char *format = ast_getformatname(codec);
 306
 307         if (!strcasecmp("ulaw", format)) {
 308                 iks *payload_eg711u, *payload_pcmu;
 309                 payload_pcmu = iks_new("payload-type");
 310                 payload_eg711u = iks_new("payload-type");
 311
 312                 if(!payload_eg711u || !payload_pcmu) {
 313                         if(payload_pcmu)
 314                                 iks_delete(payload_pcmu);
 315                         if(payload_eg711u)
 316                                 iks_delete(payload_eg711u);
 317                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 318                         return -1;
 319                 }
 320                 iks_insert_attrib(payload_pcmu, "id", "0");
 321                 iks_insert_attrib(payload_pcmu, "name", "PCMU");
 322                 iks_insert_attrib(payload_pcmu, "clockrate","8000");
 323                 iks_insert_attrib(payload_pcmu, "bitrate","64000");
 324                 iks_insert_attrib(payload_eg711u, "id", "100");
 325                 iks_insert_attrib(payload_eg711u, "name", "EG711U");
 326                 iks_insert_attrib(payload_eg711u, "clockrate","8000");
 327                 iks_insert_attrib(payload_eg711u, "bitrate","64000");
 328                 iks_insert_node(dcodecs, payload_pcmu);
 329                 iks_insert_node(dcodecs, payload_eg711u);
 330                 res ++;
 331         }
 332         if (!strcasecmp("alaw", format)) {
 333                 iks *payload_eg711a, *payload_pcma;
 334                 payload_pcma = iks_new("payload-type");
 335                 payload_eg711a = iks_new("payload-type");
 336                 if(!payload_eg711a || !payload_pcma) {
 337                         if(payload_eg711a)
 338                                 iks_delete(payload_eg711a);
 339                         if(payload_pcma)
 340                                 iks_delete(payload_pcma);
 341                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 342                         return -1;
 343                 }
 344                 iks_insert_attrib(payload_pcma, "id", "8");
 345                 iks_insert_attrib(payload_pcma, "name", "PCMA");
 346                 iks_insert_attrib(payload_pcma, "clockrate","8000");
 347                 iks_insert_attrib(payload_pcma, "bitrate","64000");
 348                 payload_eg711a = iks_new("payload-type");
 349                 iks_insert_attrib(payload_eg711a, "id", "101");
 350                 iks_insert_attrib(payload_eg711a, "name", "EG711A");
 351                 iks_insert_attrib(payload_eg711a, "clockrate","8000");
 352                 iks_insert_attrib(payload_eg711a, "bitrate","64000");
 353                 iks_insert_node(dcodecs, payload_pcma);
 354                 iks_insert_node(dcodecs, payload_eg711a);
 355                 res ++;
 356         }
 357         if (!strcasecmp("ilbc", format)) {
 358                 iks *payload_ilbc = iks_new("payload-type");
 359                 if(!payload_ilbc) {
 360                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 361                         return -1;
 362                 }
 363                 iks_insert_attrib(payload_ilbc, "id", "97");
 364                 iks_insert_attrib(payload_ilbc, "name", "iLBC");
 365                 iks_insert_attrib(payload_ilbc, "clockrate","8000");
 366                 iks_insert_attrib(payload_ilbc, "bitrate","13300");
 367                 iks_insert_node(dcodecs, payload_ilbc);
 368                 res ++;
 369         }
 370         if (!strcasecmp("g723", format)) {
 371                 iks *payload_g723 = iks_new("payload-type");
 372                 if(!payload_g723) {
 373                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 374                         return -1;
 375                 }
 376                 iks_insert_attrib(payload_g723, "id", "4");
 377                 iks_insert_attrib(payload_g723, "name", "G723");
 378                 iks_insert_attrib(payload_g723, "clockrate","8000");
 379                 iks_insert_attrib(payload_g723, "bitrate","6300");
 380                 iks_insert_node(dcodecs, payload_g723);
 381                 res ++;
 382         }
 383         if (!strcasecmp("speex", format)) {
 384                 iks *payload_speex = iks_new("payload-type");
 385                 if(!payload_speex) {
 386                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 387                         return -1;
 388                 }
 389                 iks_insert_attrib(payload_speex, "id", "110");
 390                 iks_insert_attrib(payload_speex, "name", "speex");
 391                 iks_insert_attrib(payload_speex, "clockrate","8000");
 392                 iks_insert_attrib(payload_speex, "bitrate","11000");
 393                 iks_insert_node(dcodecs, payload_speex);
 394                 res++;
 395         }
 396         if (!strcasecmp("gsm", format)) {
 397                 iks *payload_gsm = iks_new("payload-type");
 398                 if(!payload_gsm) {
 399                         ast_log(LOG_WARNING,"Failed to allocate iks node");
 400                         return -1;
 401                 }
 402                 iks_insert_attrib(payload_gsm, "id", "103");
 403                 iks_insert_attrib(payload_gsm, "name", "gsm");
 404                 iks_insert_node(dcodecs, payload_gsm);
 405                 res++;
 406         }
 407         ast_rtp_lookup_code(p->rtp, 1, codec);
 408         return res;
 409 }
 410
 411 static int gtalk_invite(struct gtalk_pvt *p, char *to, char *from, char *sid, int initiator)
 412 {
 413         struct gtalk *client = p->parent;
 414         iks *iq, *gtalk, *dcodecs, *payload_telephone, *transport;
 415         int x;
 416         int pref_codec = 0;
 417         int alreadysent = 0;
 418         int codecs_num = 0;
 419
 420         iq = iks_new("iq");
 421         gtalk = iks_new("session");
 422         dcodecs = iks_new("description");
 423         transport = iks_new("transport");
 424         payload_telephone = iks_new("payload-type");
 425         if (!(iq && gtalk && dcodecs && transport && payload_telephone)){
 426                 if(iq)
 427                         iks_delete(iq);
 428                 if(gtalk)
 429                         iks_delete(gtalk);
 430                 if(dcodecs)
 431                         iks_delete(dcodecs);
 432                 if(transport)
 433                         iks_delete(transport);
 434                 if(payload_telephone)
 435                         iks_delete(payload_telephone);
 436
 437                 ast_log(LOG_ERROR, "Could not allocate iksemel nodes\n");
 438                 return 0;
 439         }
 440         iks_insert_attrib(dcodecs, "xmlns", "http://www.google.com/session/phone");
 441         iks_insert_attrib(dcodecs, "xml:lang", "en");
 442
 443         for (x = 0; x < 32; x++) {
 444                 if (!(pref_codec = ast_codec_pref_index(&client->prefs, x)))
 445                         break;
 446                 if (!(client->capability & pref_codec))
 447                         continue;
 448                 if (alreadysent & pref_codec)
 449                         continue;
 450                 codecs_num = add_codec_to_answer(p, pref_codec, dcodecs);
 451                 alreadysent |= pref_codec;
 452         }
 453
 454         if (codecs_num) {
 455                 /* only propose DTMF within an audio session */
 456                 iks_insert_attrib(payload_telephone, "id", "106");
 457                 iks_insert_attrib(payload_telephone, "name", "telephone-event");
 458                 iks_insert_attrib(payload_telephone, "clockrate", "8000");
 459         }
 460         iks_insert_attrib(transport,"xmlns","http://www.google.com/transport/p2p");
 461
 462         iks_insert_attrib(iq, "type", "set");
 463         iks_insert_attrib(iq, "to", to);
 464         iks_insert_attrib(iq, "from", from);
 465         iks_insert_attrib(iq, "id", client->connection->mid);
 466         ast_aji_increment_mid(client->connection->mid);
 467
 468         iks_insert_attrib(gtalk, "xmlns", "http://www.google.com/session");
 469         iks_insert_attrib(gtalk, "type",initiator ? "initiate": "accept");
 470         iks_insert_attrib(gtalk, "initiator", initiator ? from : to);
 471         iks_insert_attrib(gtalk, "id", sid);
 472         iks_insert_node(iq, gtalk);
 473         iks_insert_node(gtalk, dcodecs);
 474         iks_insert_node(gtalk, transport);
 475         iks_insert_node(dcodecs, payload_telephone);
 476
 477         iks_send(client->connection->p, iq);
 478         iks_delete(payload_telephone);
 479         iks_delete(transport);
 480         iks_delete(dcodecs);
 481         iks_delete(gtalk);
 482         iks_delete(iq);
 483         return 1;
 484 }
 485
 486 static int gtalk_invite_response(struct gtalk_pvt *p, char *to , char *from, char *sid, int initiator)
 487 {
 488         iks *iq, *session, *transport;
 489         iq = iks_new("iq");
 490         session = iks_new("session");
 491         transport = iks_new("transport");
 492         if(!(iq && session && transport)) {
 493                 if(iq)
 494                         iks_delete(iq);
 495                 if(session)
 496                         iks_delete(session);
 497                 if(transport)
 498                         iks_delete(transport);
 499                 ast_log(LOG_ERROR, " Unable to allocate IKS node\n");
 500                 return -1;
 501         }
 502         iks_insert_attrib(iq, "from", from);
 503         iks_insert_attrib(iq, "to", to);
 504         iks_insert_attrib(iq, "type", "set");
 505         iks_insert_attrib(iq, "id",p->parent->connection->mid);
 506         ast_aji_increment_mid(p->parent->connection->mid);
 507         iks_insert_attrib(session, "type", "transport-accept");
 508         iks_insert_attrib(session, "id", sid);
 509         iks_insert_attrib(session, "initiator", initiator ? from : to);
 510         iks_insert_attrib(session, "xmlns", "http://www.google.com/session");
 511         iks_insert_attrib(transport, "xmlns", "http://www.google.com/transport/p2p");
 512         iks_insert_node(iq,session);
 513         iks_insert_node(session,transport);
 514         iks_send(p->parent->connection->p, iq);
 515         iks_delete(transport);
 516         iks_delete(session);
 517         iks_delete(iq);
 518         return 1;
 519
 520 }
 521
 522 static int gtalk_ringing_ack(void *data, ikspak *pak)
 523 {
 524         struct gtalk_pvt *p = data;
 525
 526         if (p->ringrule)
 527                 iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
 528         p->ringrule = NULL;
 529         if (p->owner)
 530                 ast_queue_control(p->owner, AST_CONTROL_RINGING);
 531         return IKS_FILTER_EAT;
 532 }
 533
 534 static int gtalk_answer(struct ast_channel *ast)
 535 {
 536         struct gtalk_pvt *p = ast->tech_pvt;
 537         int res = 0;
 538
 539         if (option_debug)
 540                 ast_log(LOG_DEBUG, "Answer!\n");
 541         ast_mutex_lock(&p->lock);
 542         gtalk_invite(p, p->them, p->us,p->sid, 0);
 543         ast_mutex_unlock(&p->lock);
 544         return res;
 545 }
 546
 547 static enum ast_rtp_get_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp)
 548 {
 549         struct gtalk_pvt *p = chan->tech_pvt;
 550         enum ast_rtp_get_result res = AST_RTP_GET_FAILED;
 551
 552         if (!p)
 553                 return res;
 554
 555         ast_mutex_lock(&p->lock);
 556         if (p->rtp){
 557                 *rtp = p->rtp;
 558                 res = AST_RTP_TRY_PARTIAL;
 559         }
 560         ast_mutex_unlock(&p->lock);
 561
 562         return res;
 563 }
 564
 565 static int gtalk_get_codec(struct ast_channel *chan)
 566 {
 567         struct gtalk_pvt *p = chan->tech_pvt;
 568         return p->peercapability;
 569 }
 570
 571 static int gtalk_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp, int codecs, int nat_active)
 572 {
 573         struct gtalk_pvt *p;
 574
 575         p = chan->tech_pvt;
 576         if (!p)
 577                 return -1;
 578         ast_mutex_lock(&p->lock);
 579
 580 /*      if (rtp)
 581                 ast_rtp_get_peer(rtp, &p->redirip);
 582         else
 583                 memset(&p->redirip, 0, sizeof(p->redirip));
 584         p->redircodecs = codecs; */
 585
 586         /* Reset lastrtprx timer */
 587         ast_mutex_unlock(&p->lock);
 588         return 0;
 589 }
 590
 591 static int gtalk_response(struct gtalk *client, char *from, ikspak *pak, const char *reasonstr, const char *reasonstr2)
 592 {
 593         iks *response = NULL, *error = NULL, *reason = NULL;
 594         int res = -1;
 595
 596         response = iks_new("iq");
 597         if (response) {
 598                 iks_insert_attrib(response, "type", "result");
 599                 iks_insert_attrib(response, "from", from);
 600                 iks_insert_attrib(response, "to", iks_find_attrib(pak->x, "from"));
 601                 iks_insert_attrib(response, "id", iks_find_attrib(pak->x, "id"));
 602                 if (reasonstr) {
 603                         error = iks_new("error");
 604                         if (error) {
 605                                 iks_insert_attrib(error, "type", "cancel");
 606                                 reason = iks_new(reasonstr);
 607                                 if (reason)
 608                                         iks_insert_node(error, reason);
 609                                 iks_insert_node(response, error);
 610                         }
 611                 }
 612                 iks_send(client->connection->p, response);
 613                 if (reason)
 614                         iks_delete(reason);
 615                 if (error)
 616                         iks_delete(error);
 617                 iks_delete(response);
 618                 res = 0;
 619         }
 620         return res;
 621 }
 622
 623 static int gtalk_is_answered(struct gtalk *client, ikspak *pak)
 624 {
 625         struct gtalk_pvt *tmp;
 626         char *from;
 627         iks *codec;
 628         char s1[BUFSIZ], s2[BUFSIZ], s3[BUFSIZ];
 629         int peernoncodeccapability;
 630
 631         ast_log(LOG_DEBUG, "The client is %s\n", client->name);
 632         /* Make sure our new call doesn't exist yet */
 633         for (tmp = client->p; tmp; tmp = tmp->next) {
 634                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
 635                         break;
 636         }
 637
 638         /* codec points to the first <payload-type/> tag */
 639         codec = iks_child(iks_child(iks_child(pak->x)));
 640         while (codec) {
 641                 ast_rtp_set_m_type(tmp->rtp, atoi(iks_find_attrib(codec, "id")));
 642                 ast_rtp_set_rtpmap_type(tmp->rtp, atoi(iks_find_attrib(codec, "id")), "audio", iks_find_attrib(codec, "name"), 0);
 643                 codec = iks_next(codec);
 644         }
 645
 646         /* Now gather all of the codecs that we are asked for */
 647         ast_rtp_get_current_formats(tmp->rtp, &tmp->peercapability, &peernoncodeccapability);
 648
 649         /* at this point, we received an awser from the remote Gtalk client,
 650            which allows us to compare capabilities */
 651         tmp->jointcapability = tmp->capability & tmp->peercapability;
 652         if (!tmp->jointcapability) {
 653                 ast_log(LOG_WARNING, "Capabilities don't match : us - %s, peer - %s, combined - %s \n", ast_getformatname_multiple(s1, BUFSIZ, tmp->capability),
 654                         ast_getformatname_multiple(s2, BUFSIZ, tmp->peercapability),
 655                         ast_getformatname_multiple(s3, BUFSIZ, tmp->jointcapability));
 656                 /* close session if capabilities don't match */
 657                 ast_queue_hangup(tmp->owner);
 658
 659                 return -1;
 660
 661         }
 662
 663         from = iks_find_attrib(pak->x, "to");
 664         if(!from)
 665                 from = client->connection->jid->full;
 666
 667         if (tmp) {
 668                 if (tmp->owner)
 669                         ast_queue_control(tmp->owner, AST_CONTROL_ANSWER);
 670         } else
 671                 ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
 672         gtalk_response(client, from, pak, NULL, NULL);
 673         return 1;
 674 }
 675
 676 static int gtalk_is_accepted(struct gtalk *client, ikspak *pak)
 677 {
 678         struct gtalk_pvt *tmp;
 679         char *from;
 680
 681         ast_log(LOG_DEBUG, "The client is %s\n", client->name);
 682         /* find corresponding call */
 683         for (tmp = client->p; tmp; tmp = tmp->next) {
 684                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
 685                         break;
 686         }
 687
 688         from = iks_find_attrib(pak->x, "to");
 689         if(!from)
 690                 from = client->connection->jid->full;
 691
 692         if (!tmp)
 693                 ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
 694
 695         /* answer 'iq' packet to let the remote peer know that we're alive */
 696         gtalk_response(client, from, pak, NULL, NULL);
 697         return 1;
 698 }
 699
 700 static int gtalk_handle_dtmf(struct gtalk *client, ikspak *pak)
 701 {
 702         struct gtalk_pvt *tmp;
 703         iks *dtmfnode = NULL, *dtmfchild = NULL;
 704         char *dtmf;
 705         char *from;
 706         /* Make sure our new call doesn't exist yet */
 707         for (tmp = client->p; tmp; tmp = tmp->next) {
 708                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) || iks_find_with_attrib(pak->x, "gtalk", "sid", tmp->sid))
 709                         break;
 710         }
 711         from = iks_find_attrib(pak->x, "to");
 712         if(!from)
 713                 from = client->connection->jid->full;
 714
 715
 716         if (tmp) {
 717                 if(iks_find_with_attrib(pak->x, "dtmf-method", "method", "rtp")) {
 718                         gtalk_response(client, from, pak,
 719                                         "feature-not-implemented xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'",
 720                                         "unsupported-dtmf-method xmlns='http://jabber.org/protocol/gtalk/info/dtmf#errors'");
 721                         return -1;
 722                 }
 723                 if ((dtmfnode = iks_find(pak->x, "dtmf"))) {
 724                         if((dtmf = iks_find_attrib(dtmfnode, "code"))) {
 725                                 if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-up")) {
 726                                         struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
 727                                         f.subclass = dtmf[0];
 728                                         ast_queue_frame(tmp->owner, &f);
 729                                         ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
 730                                 } else if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-down")) {
 731                                         struct ast_frame f = {AST_FRAME_DTMF_END, };
 732                                         f.subclass = dtmf[0];
 733                                         ast_queue_frame(tmp->owner, &f);
 734                                         ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
 735                                 } else if(iks_find_attrib(pak->x, "dtmf")) { /* 250 millasecond default */
 736                                         struct ast_frame f = {AST_FRAME_DTMF, };
 737                                         f.subclass = dtmf[0];
 738                                         ast_queue_frame(tmp->owner, &f);
 739                                         ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
 740                                 }
 741                         }
 742                 } else if ((dtmfnode = iks_find_with_attrib(pak->x, "gtalk", "action", "session-info"))) {
 743                         if((dtmfchild = iks_find(dtmfnode, "dtmf"))) {
 744                                 if((dtmf = iks_find_attrib(dtmfchild, "code"))) {
 745                                         if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-up")) {
 746                                                 struct ast_frame f = {AST_FRAME_DTMF_END, };
 747                                                 f.subclass = dtmf[0];
 748                                                 ast_queue_frame(tmp->owner, &f);
 749                                                 ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
 750                                         } else if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-down")) {
 751                                                 struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
 752                                                 f.subclass = dtmf[0];
 753                                                 ast_queue_frame(tmp->owner, &f);
 754                                                 ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
 755                                         }
 756                                 }
 757                         }
 758                 }
 759                 gtalk_response(client, from, pak, NULL, NULL);
 760                 return 1;
 761         } else
 762                 ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
 763
 764         gtalk_response(client, from, pak, NULL, NULL);
 765         return 1;
 766 }
 767
 768 static int gtalk_hangup_farend(struct gtalk *client, ikspak *pak)
 769 {
 770         struct gtalk_pvt *tmp;
 771         char *from;
 772
 773         ast_log(LOG_DEBUG, "The client is %s\n", client->name);
 774         /* Make sure our new call doesn't exist yet */
 775         for (tmp = client->p; tmp; tmp = tmp->next) {
 776                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
 777                         break;
 778         }
 779         from = iks_find_attrib(pak->x, "to");
 780         if(!from)
 781                 from = client->connection->jid->full;
 782
 783         if (tmp) {
 784                 tmp->alreadygone = 1;
 785                 if (tmp->owner)
 786                         ast_queue_hangup(tmp->owner);
 787         } else
 788                 ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
 789         gtalk_response(client, from, pak, NULL, NULL);
 790         return 1;
 791 }
 792
 793 static int gtalk_create_candidates(struct gtalk *client, struct gtalk_pvt *p, char *sid, char *from, char *to)
 794 {
 795         struct gtalk_candidate *tmp;
 796         struct aji_client *c = client->connection;
 797         struct gtalk_candidate *ours1 = NULL, *ours2 = NULL;
 798         struct sockaddr_in sin;
 799         struct sockaddr_in dest;
 800         struct in_addr us;
 801         iks *iq, *gtalk, *candidate, *transport;
 802         char user[17], pass[17], preference[5], port[7];
 803
 804
 805         iq = iks_new("iq");
 806         gtalk = iks_new("session");
 807         candidate = iks_new("candidate");
 808         transport = iks_new("transport");
 809         if (!iq || !gtalk || !candidate || !transport) {
 810                 ast_log(LOG_ERROR, "Memory allocation error\n");
 811                 goto safeout;
 812         }
 813         ours1 = ast_calloc(1, sizeof(*ours1));
 814         ours2 = ast_calloc(1, sizeof(*ours2));
 815         if (!ours1 || !ours2)
 816                 goto safeout;
 817
 818         iks_insert_attrib(transport, "xmlns","http://www.google.com/transport/p2p");
 819         iks_insert_node(iq, gtalk);
 820         iks_insert_node(gtalk,transport);
 821         iks_insert_node(transport, candidate);
 822
 823         for (; p; p = p->next) {
 824                 if (!strcasecmp(p->sid, sid))
 825                         break;
 826         }
 827
 828         if (!p) {
 829                 ast_log(LOG_NOTICE, "No matching gtalk session - SID %s!\n", sid);
 830                 goto safeout;
 831         }
 832
 833         ast_rtp_get_us(p->rtp, &sin);
 834         ast_find_ourip(&us, bindaddr);
 835
 836         /* Setup our gtalk candidates */
 837         ast_copy_string(ours1->name, "rtp", sizeof(ours1->name));
 838         ours1->port = ntohs(sin.sin_port);
 839         ours1->preference = 1;
 840         snprintf(user, sizeof(user), "%08lx%08lx", ast_random(), ast_random());
 841         snprintf(pass, sizeof(pass), "%08lx%08lx", ast_random(), ast_random());
 842         ast_copy_string(ours1->username, user, sizeof(ours1->username));
 843         ast_copy_string(ours1->password, pass, sizeof(ours1->password));
 844         ast_copy_string(ours1->ip, ast_inet_ntoa(us), sizeof(ours1->ip));
 845         ours1->protocol = AJI_PROTOCOL_UDP;
 846         ours1->type = AJI_CONNECT_LOCAL;
 847         ours1->generation = 0;
 848         p->ourcandidates = ours1;
 849
 850         if (!ast_strlen_zero(externip)) {
 851                 /* XXX We should really stun for this one not just go with externip XXX */
 852                 snprintf(user, sizeof(user), "%08lx%08lx", ast_random(), ast_random());
 853                 snprintf(pass, sizeof(pass), "%08lx%08lx", ast_random(), ast_random());
 854                 ast_copy_string(ours2->username, user, sizeof(ours2->username));
 855                 ast_copy_string(ours2->password, pass, sizeof(ours2->password));
 856                 ast_copy_string(ours2->ip, externip, sizeof(ours2->ip));
 857                 ast_copy_string(ours2->name, "rtp", sizeof(ours1->name));
 858                 ours2->port = ntohs(sin.sin_port);
 859                 ours2->preference = 0.9;
 860                 ours2->protocol = AJI_PROTOCOL_UDP;
 861                 ours2->type = AJI_CONNECT_STUN;
 862                 ours2->generation = 0;
 863                 ours1->next = ours2;
 864                 ours2 = NULL;
 865         }
 866         ours1 = NULL;
 867         dest.sin_addr = __ourip;
 868         dest.sin_port = sin.sin_port;
 869
 870
 871         for (tmp = p->ourcandidates; tmp; tmp = tmp->next) {
 872                 snprintf(port, sizeof(port), "%d", tmp->port);
 873                 snprintf(preference, sizeof(preference), "%.2f", tmp->preference);
 874                 iks_insert_attrib(iq, "from", to);
 875                 iks_insert_attrib(iq, "to", from);
 876                 iks_insert_attrib(iq, "type", "set");
 877                 iks_insert_attrib(iq, "id", c->mid);
 878                 ast_aji_increment_mid(c->mid);
 879                 iks_insert_attrib(gtalk, "type", "transport-info");
 880                 iks_insert_attrib(gtalk, "id", sid);
 881                 iks_insert_attrib(gtalk, "initiator", (p->initiator) ? to : from);
 882                 iks_insert_attrib(gtalk, "xmlns", GOOGLE_NS);
 883                 iks_insert_attrib(candidate, "name", tmp->name);
 884                 iks_insert_attrib(candidate, "address", tmp->ip);
 885                 iks_insert_attrib(candidate, "port", port);
 886                 iks_insert_attrib(candidate, "username", tmp->username);
 887                 iks_insert_attrib(candidate, "password", tmp->password);
 888                 iks_insert_attrib(candidate, "preference", preference);
 889                 if (tmp->protocol == AJI_PROTOCOL_UDP)
 890                         iks_insert_attrib(candidate, "protocol", "udp");
 891                 if (tmp->protocol == AJI_PROTOCOL_SSLTCP)
 892                         iks_insert_attrib(candidate, "protocol", "ssltcp");
 893                 if (tmp->type == AJI_CONNECT_STUN)
 894                         iks_insert_attrib(candidate, "type", "stun");
 895                 if (tmp->type == AJI_CONNECT_LOCAL)
 896                         iks_insert_attrib(candidate, "type", "local");
 897                 if (tmp->type == AJI_CONNECT_RELAY)
 898                         iks_insert_attrib(candidate, "type", "relay");
 899                 iks_insert_attrib(candidate, "network", "0");
 900                 iks_insert_attrib(candidate, "generation", "0");
 901                 iks_send(c->p, iq);
 902         }
 903         p->laststun = 0;
 904
 905 safeout:
 906         if (ours1)
 907                 free(ours1);
 908         if (ours2)
 909                 free(ours2);
 910         if (iq)
 911                 iks_delete(iq);
 912         if (gtalk)
 913                 iks_delete(gtalk);
 914         if (candidate)
 915                 iks_delete(candidate);
 916         if(transport)
 917                 iks_delete(transport);
 918         return 1;
 919 }
 920
 921 static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid)
 922 {
 923         struct gtalk_pvt *tmp = NULL;
 924         struct aji_resource *resources = NULL;
 925         struct aji_buddy *buddy;
 926         char idroster[200];
 927         char *data, *exten = NULL;
 928
 929         if (option_debug)
 930                 ast_log(LOG_DEBUG, "The client is %s for alloc\n", client->name);
 931         if (!sid && !strchr(them, '/')) {       /* I started call! */
 932                 if (!strcasecmp(client->name, "guest")) {
 933                         buddy = ASTOBJ_CONTAINER_FIND(&client->connection->buddies, them);
 934                         if (buddy)
 935                                 resources = buddy->resources;
 936                 } else if (client->buddy)
 937                         resources = client->buddy->resources;
 938                 while (resources) {
 939                         if (resources->cap->jingle) {
 940                                 break;
 941                         }
 942                         resources = resources->next;
 943                 }
 944                 if (resources)
 945                         snprintf(idroster, sizeof(idroster), "%s/%s", them, resources->resource);
 946                 else {
 947                         ast_log(LOG_ERROR, "no gtalk capable clients to talk to.\n");
 948                         return NULL;
 949                 }
 950         }
 951         if (!(tmp = ast_calloc(1, sizeof(*tmp)))) {
 952                 return NULL;
 953         }
 954         if (sid) {
 955                 ast_copy_string(tmp->sid, sid, sizeof(tmp->sid));
 956                 ast_copy_string(tmp->them, them, sizeof(tmp->them));
 957                 ast_copy_string(tmp->us, us, sizeof(tmp->us));
 958         } else {
 959                 snprintf(tmp->sid, sizeof(tmp->sid), "%08lx%08lx", ast_random(), ast_random());
 960                 ast_copy_string(tmp->them, idroster, sizeof(tmp->them));
 961                 ast_copy_string(tmp->us, us, sizeof(tmp->us));
 962                 tmp->initiator = 1;
 963         }
 964         /* clear codecs */
 965         tmp->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, bindaddr.sin_addr);
 966         ast_rtp_pt_clear(tmp->rtp);
 967
 968         /* add user configured codec capabilites */
 969         if (client->capability)
 970                 tmp->capability = client->capability;
 971         else if (global_capability)
 972                 tmp->capability = global_capability;
 973
 974         tmp->parent = client;
 975         if (!tmp->rtp) {
 976                 ast_log(LOG_WARNING, "Out of RTP sessions?\n");
 977                 free(tmp);
 978                 return NULL;
 979         }
 980
 981         /* Set CALLERID(name) to the full JID of the remote peer */
 982         ast_copy_string(tmp->cid_name, tmp->them, sizeof(tmp->cid_name));
 983
 984         if(strchr(tmp->us, '/')) {
 985                 data = ast_strdupa(tmp->us);
 986                 exten = strsep(&data, "/");
 987         } else
 988                 exten = tmp->us;
 989         ast_copy_string(tmp->exten,  exten, sizeof(tmp->exten));
 990         ast_mutex_init(&tmp->lock);
 991         ast_mutex_lock(&gtalklock);
 992         tmp->next = client->p;
 993         client->p = tmp;
 994         ast_mutex_unlock(&gtalklock);
 995         return tmp;
 996 }
 997
 998 /*! \brief Start new gtalk channel */
 999 static struct ast_channel *gtalk_new(struct gtalk *client, struct gtalk_pvt *i, int state, const char *title)
1000 {
1001         struct ast_channel *tmp;
1002         int fmt;
1003         int what;
1004         const char *n2;
1005
1006         if (title)
1007                 n2 = title;
1008         else
1009                 n2 = i->us;
1010         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);
1011         if (!tmp) {
1012                 ast_log(LOG_WARNING, "Unable to allocate Gtalk channel structure!\n");
1013                 return NULL;
1014         }
1015         tmp->tech = &gtalk_tech;
1016
1017         /* Select our native format based on codec preference until we receive
1018            something from another device to the contrary. */
1019         if (i->jointcapability)
1020                 what = i->jointcapability;
1021         else if (i->capability)
1022                 what = i->capability;
1023         else
1024                 what = global_capability;
1025         tmp->nativeformats = ast_codec_choose(&i->prefs, what, 1) | (i->jointcapability & AST_FORMAT_VIDEO_MASK);
1026         fmt = ast_best_codec(tmp->nativeformats);
1027
1028         if (i->rtp) {
1029                 ast_rtp_setstun(i->rtp, 1);
1030                 tmp->fds[0] = ast_rtp_fd(i->rtp);
1031                 tmp->fds[1] = ast_rtcp_fd(i->rtp);
1032         }
1033         if (i->vrtp) {
1034                 ast_rtp_setstun(i->rtp, 1);
1035                 tmp->fds[2] = ast_rtp_fd(i->vrtp);
1036                 tmp->fds[3] = ast_rtcp_fd(i->vrtp);
1037         }
1038         if (state == AST_STATE_RING)
1039                 tmp->rings = 1;
1040         tmp->adsicpe = AST_ADSI_UNAVAILABLE;
1041         tmp->writeformat = fmt;
1042         tmp->rawwriteformat = fmt;
1043         tmp->readformat = fmt;
1044         tmp->rawreadformat = fmt;
1045         tmp->tech_pvt = i;
1046
1047         tmp->callgroup = client->callgroup;
1048         tmp->pickupgroup = client->pickupgroup;
1049         tmp->cid.cid_pres = client->callingpres;
1050         if (!ast_strlen_zero(client->accountcode))
1051                 ast_string_field_set(tmp, accountcode, client->accountcode);
1052         if (client->amaflags)
1053                 tmp->amaflags = client->amaflags;
1054         if (!ast_strlen_zero(client->language))
1055                 ast_string_field_set(tmp, language, client->language);
1056         if (!ast_strlen_zero(client->musicclass))
1057                 ast_string_field_set(tmp, musicclass, client->musicclass);
1058         i->owner = tmp;
1059         ast_module_ref(ast_module_info->self);
1060         ast_copy_string(tmp->context, client->context, sizeof(tmp->context));
1061         ast_copy_string(tmp->exten, i->exten, sizeof(tmp->exten));
1062
1063         if (!ast_strlen_zero(i->exten) && strcmp(i->exten, "s"))
1064                 tmp->cid.cid_dnid = ast_strdup(i->exten);
1065         tmp->priority = 1;
1066         if (i->rtp)
1067                 ast_jb_configure(tmp, &global_jbconf);
1068         if (state != AST_STATE_DOWN && ast_pbx_start(tmp)) {
1069                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
1070                 tmp->hangupcause = AST_CAUSE_SWITCH_CONGESTION;
1071                 ast_hangup(tmp);
1072                 tmp = NULL;
1073         }
1074
1075         return tmp;
1076 }
1077
1078 static int gtalk_action(struct gtalk *client, struct gtalk_pvt *p, const char *action)
1079 {
1080         iks *request, *session = NULL;
1081         int res = -1;
1082
1083         request = iks_new("iq");
1084         if (request) {
1085                 iks_insert_attrib(request, "type", "set");
1086                 iks_insert_attrib(request, "from", p->us);
1087                 iks_insert_attrib(request, "to", p->them);
1088                 iks_insert_attrib(request, "id", client->connection->mid);
1089                 ast_aji_increment_mid(client->connection->mid);
1090                 session = iks_new("session");
1091                 if (session) {
1092                         iks_insert_attrib(session, "type", action);
1093                         iks_insert_attrib(session, "id", p->sid);
1094                         iks_insert_attrib(session, "initiator", p->initiator ? p->us : p->them);
1095                         iks_insert_attrib(session, "xmlns", "http://www.google.com/session");
1096                         iks_insert_node(request, session);
1097                         iks_send(client->connection->p, request);
1098                         iks_delete(session);
1099                         res = 0;
1100                 }
1101                 iks_delete(request);
1102         }
1103         return res;
1104 }
1105
1106 static void gtalk_free_candidates(struct gtalk_candidate *candidate)
1107 {
1108         struct gtalk_candidate *last;
1109         while (candidate) {
1110                 last = candidate;
1111                 candidate = candidate->next;
1112                 free(last);
1113         }
1114 }
1115
1116 static void gtalk_free_pvt(struct gtalk *client, struct gtalk_pvt *p)
1117 {
1118         struct gtalk_pvt *cur, *prev = NULL;
1119         cur = client->p;
1120         while (cur) {
1121                 if (cur == p) {
1122                         if (prev)
1123                                 prev->next = p->next;
1124                         else
1125                                 client->p = p->next;
1126                         break;
1127                 }
1128                 prev = cur;
1129                 cur = cur->next;
1130         }
1131         if (p->ringrule)
1132                 iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
1133         if (p->owner)
1134                 ast_log(LOG_WARNING, "Uh oh, there's an owner, this is going to be messy.\n");
1135         if (p->rtp)
1136                 ast_rtp_destroy(p->rtp);
1137         if (p->vrtp)
1138                 ast_rtp_destroy(p->vrtp);
1139         gtalk_free_candidates(p->theircandidates);
1140         free(p);
1141 }
1142
1143
1144 static int gtalk_newcall(struct gtalk *client, ikspak *pak)
1145 {
1146         struct gtalk_pvt *p, *tmp = client->p;
1147         struct ast_channel *chan;
1148         int res;
1149         iks *codec;
1150         char *from = NULL;
1151         char s1[BUFSIZ], s2[BUFSIZ], s3[BUFSIZ];
1152         int peernoncodeccapability;
1153
1154         /* Make sure our new call doesn't exist yet */
1155         from = iks_find_attrib(pak->x,"to");
1156         if(!from)
1157                 from = client->connection->jid->full;
1158
1159         while (tmp) {
1160                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
1161                         ast_log(LOG_NOTICE, "Ignoring duplicate call setup on SID %s\n", tmp->sid);
1162                         gtalk_response(client, from, pak, "out-of-order", NULL);
1163                         return -1;
1164                 }
1165                 tmp = tmp->next;
1166         }
1167
1168         p = gtalk_alloc(client, from, pak->from->full, iks_find_attrib(pak->query, "id"));
1169         if (!p) {
1170                 ast_log(LOG_WARNING, "Unable to allocate gtalk structure!\n");
1171                 return -1;
1172         }
1173
1174         chan = gtalk_new(client, p, AST_STATE_DOWN, pak->from->user);
1175         if (!chan) {
1176                 gtalk_free_pvt(client, p);
1177                 return -1;
1178         }
1179
1180         ast_mutex_lock(&p->lock);
1181         ast_copy_string(p->them, pak->from->full, sizeof(p->them));
1182         if (iks_find_attrib(pak->query, "id")) {
1183                 ast_copy_string(p->sid, iks_find_attrib(pak->query, "id"),
1184                                 sizeof(p->sid));
1185         }
1186
1187         /* codec points to the first <payload-type/> tag */
1188         codec = iks_child(iks_child(iks_child(pak->x)));
1189
1190         while (codec) {
1191                 ast_rtp_set_m_type(p->rtp, atoi(iks_find_attrib(codec, "id")));
1192                 ast_rtp_set_rtpmap_type(p->rtp, atoi(iks_find_attrib(codec, "id")), "audio", iks_find_attrib(codec, "name"), 0);
1193                 codec = iks_next(codec);
1194         }
1195
1196         /* Now gather all of the codecs that we are asked for */
1197         ast_rtp_get_current_formats(p->rtp, &p->peercapability, &peernoncodeccapability);
1198         p->jointcapability = p->capability & p->peercapability;
1199         ast_mutex_unlock(&p->lock);
1200
1201         ast_setstate(chan, AST_STATE_RING);
1202         if (!p->jointcapability) {
1203                 ast_log(LOG_WARNING, "Capabilities don't match : us - %s, peer - %s, combined - %s \n", ast_getformatname_multiple(s1, BUFSIZ, p->capability),
1204                         ast_getformatname_multiple(s2, BUFSIZ, p->peercapability),
1205                         ast_getformatname_multiple(s3, BUFSIZ, p->jointcapability));
1206                 /* close session if capabilities don't match */
1207                 gtalk_action(client, p, "reject");
1208                 p->alreadygone = 1;
1209                 gtalk_hangup(chan);
1210                 ast_channel_free(chan);
1211                 return -1;
1212         }
1213
1214         res = ast_pbx_start(chan);
1215
1216         switch (res) {
1217         case AST_PBX_FAILED:
1218                 ast_log(LOG_WARNING, "Failed to start PBX :(\n");
1219                 gtalk_response(client, from, pak, "service-unavailable", NULL);
1220                 break;
1221         case AST_PBX_CALL_LIMIT:
1222                 ast_log(LOG_WARNING, "Failed to start PBX (call limit reached) \n");
1223                 gtalk_response(client, from, pak, "service-unavailable", NULL);
1224                 break;
1225         case AST_PBX_SUCCESS:
1226                 gtalk_response(client, from, pak, NULL, NULL);
1227                 gtalk_invite_response(p, p->them, p->us,p->sid, 0);
1228                 gtalk_create_candidates(client, p, p->sid, p->them, p->us);
1229                 /* nothing to do */
1230                 break;
1231         }
1232
1233         return 1;
1234 }
1235
1236 static int gtalk_update_stun(struct gtalk *client, struct gtalk_pvt *p)
1237 {
1238         struct gtalk_candidate *tmp;
1239         struct hostent *hp;
1240         struct ast_hostent ahp;
1241         struct sockaddr_in sin;
1242         struct sockaddr_in aux;
1243
1244         if (time(NULL) == p->laststun)
1245                 return 0;
1246
1247         tmp = p->theircandidates;
1248         p->laststun = time(NULL);
1249         while (tmp) {
1250                 char username[256];
1251
1252                 /* Find the IP address of the host */
1253                 hp = ast_gethostbyname(tmp->ip, &ahp);
1254                 sin.sin_family = AF_INET;
1255                 memcpy(&sin.sin_addr, hp->h_addr, sizeof(sin.sin_addr));
1256                 sin.sin_port = htons(tmp->port);
1257                 snprintf(username, sizeof(username), "%s%s", tmp->username,
1258                          p->ourcandidates->username);
1259
1260                 /* Find out the result of the STUN */
1261                 ast_rtp_get_peer(p->rtp, &aux);
1262
1263                 /* If the STUN result is different from the IP of the hostname,
1264                         lock on the stun IP of the hostname advertised by the
1265                         remote client */
1266                 if (aux.sin_addr.s_addr &&
1267                     aux.sin_addr.s_addr != sin.sin_addr.s_addr)
1268                         ast_rtp_stun_request(p->rtp, &aux, username);
1269                 else
1270                         ast_rtp_stun_request(p->rtp, &sin, username);
1271
1272                 if (aux.sin_addr.s_addr && option_debug > 3) {
1273                         ast_log(LOG_DEBUG, "Receiving RTP traffic from IP %s, matches with remote candidate's IP %s\n", ast_inet_ntoa(aux.sin_addr), tmp->ip);
1274                         ast_log(LOG_DEBUG, "Sending STUN request to %s\n", tmp->ip);
1275                 }
1276
1277                 tmp = tmp->next;
1278         }
1279         return 1;
1280 }
1281
1282 static int gtalk_add_candidate(struct gtalk *client, ikspak *pak)
1283 {
1284         struct gtalk_pvt *p = NULL, *tmp = NULL;
1285         struct aji_client *c = client->connection;
1286         struct gtalk_candidate *newcandidate = NULL;
1287         iks *traversenodes = NULL, *receipt = NULL;
1288         char *from;
1289
1290         from = iks_find_attrib(pak->x,"to");
1291         if(!from)
1292                 from = c->jid->full;
1293
1294         for (tmp = client->p; tmp; tmp = tmp->next) {
1295                 if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
1296                         p = tmp;
1297                         break;
1298                 }
1299         }
1300
1301         if (!p)
1302                 return -1;
1303
1304         traversenodes = pak->query;
1305         while(traversenodes) {
1306                 if(!strcasecmp(iks_name(traversenodes), "session")) {
1307                         traversenodes = iks_child(traversenodes);
1308                         continue;
1309                 }
1310                 if(!strcasecmp(iks_name(traversenodes), "transport")) {
1311                         traversenodes = iks_child(traversenodes);
1312                         continue;
1313                 }
1314                 if(!strcasecmp(iks_name(traversenodes), "candidate")) {
1315                         newcandidate = ast_calloc(1, sizeof(*newcandidate));
1316                         if (!newcandidate)
1317                                 return 0;
1318                         ast_copy_string(newcandidate->name, iks_find_attrib(traversenodes, "name"),
1319                                                         sizeof(newcandidate->name));
1320                         ast_copy_string(newcandidate->ip, iks_find_attrib(traversenodes, "address"),
1321                                                         sizeof(newcandidate->ip));
1322                         newcandidate->port = atoi(iks_find_attrib(traversenodes, "port"));
1323                         ast_copy_string(newcandidate->username, iks_find_attrib(traversenodes, "username"),
1324                                                         sizeof(newcandidate->username));
1325                         ast_copy_string(newcandidate->password, iks_find_attrib(traversenodes, "password"),
1326                                                         sizeof(newcandidate->password));
1327                         newcandidate->preference = atof(iks_find_attrib(traversenodes, "preference"));
1328                         if (!strcasecmp(iks_find_attrib(traversenodes, "protocol"), "udp"))
1329                                 newcandidate->protocol = AJI_PROTOCOL_UDP;
1330                         if (!strcasecmp(iks_find_attrib(traversenodes, "protocol"), "ssltcp"))
1331                                 newcandidate->protocol = AJI_PROTOCOL_SSLTCP;
1332
1333                         if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "stun"))
1334                                 newcandidate->type = AJI_CONNECT_STUN;
1335                         if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "local"))
1336                                 newcandidate->type = AJI_CONNECT_LOCAL;
1337                         if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "relay"))
1338                                 newcandidate->type = AJI_CONNECT_RELAY;
1339                         ast_copy_string(newcandidate->network, iks_find_attrib(traversenodes, "network"),
1340                                                         sizeof(newcandidate->network));
1341                         newcandidate->generation = atoi(iks_find_attrib(traversenodes, "generation"));
1342                         newcandidate->next = NULL;
1343
1344                         newcandidate->next = p->theircandidates;
1345                         p->theircandidates = newcandidate;
1346                         p->laststun = 0;
1347                         gtalk_update_stun(p->parent, p);
1348                         newcandidate = NULL;
1349                 }
1350                 traversenodes = iks_next(traversenodes);
1351         }
1352
1353         receipt = iks_new("iq");
1354         iks_insert_attrib(receipt, "type", "result");
1355         iks_insert_attrib(receipt, "from", from);
1356         iks_insert_attrib(receipt, "to", iks_find_attrib(pak->x, "from"));
1357         iks_insert_attrib(receipt, "id", iks_find_attrib(pak->x, "id"));
1358         iks_send(c->p, receipt);
1359         iks_delete(receipt);
1360
1361         return 1;
1362 }
1363
1364 static struct ast_frame *gtalk_rtp_read(struct ast_channel *ast, struct gtalk_pvt *p)
1365 {
1366         struct ast_frame *f;
1367
1368         if (!p->rtp)
1369                 return &ast_null_frame;
1370         f = ast_rtp_read(p->rtp);
1371         gtalk_update_stun(p->parent, p);
1372         if (p->owner) {
1373                 /* We already hold the channel lock */
1374                 if (f->frametype == AST_FRAME_VOICE) {
1375                         if (f->subclass != (p->owner->nativeformats & AST_FORMAT_AUDIO_MASK)) {
1376                                 if (option_debug)
1377                                         ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
1378                                 p->owner->nativeformats =
1379                                         (p->owner->nativeformats & AST_FORMAT_VIDEO_MASK) | f->subclass;
1380                                 ast_set_read_format(p->owner, p->owner->readformat);
1381                                 ast_set_write_format(p->owner, p->owner->writeformat);
1382                         }
1383 /*                      if ((ast_test_flag(p, SIP_DTMF) == SIP_DTMF_INBAND) && p->vad) {
1384                                 f = ast_dsp_process(p->owner, p->vad, f);
1385                                 if (option_debug && f && (f->frametype == AST_FRAME_DTMF))
1386                                         ast_log(LOG_DEBUG, "* Detected inband DTMF '%c'\n", f->subclass);
1387                         } */
1388                 }
1389         }
1390         return f;
1391 }
1392
1393 static struct ast_frame *gtalk_read(struct ast_channel *ast)
1394 {
1395         struct ast_frame *fr;
1396         struct gtalk_pvt *p = ast->tech_pvt;
1397
1398         ast_mutex_lock(&p->lock);
1399         fr = gtalk_rtp_read(ast, p);
1400         ast_mutex_unlock(&p->lock);
1401         return fr;
1402 }
1403
1404 /*! \brief Send frame to media channel (rtp) */
1405 static int gtalk_write(struct ast_channel *ast, struct ast_frame *frame)
1406 {
1407         struct gtalk_pvt *p = ast->tech_pvt;
1408         int res = 0;
1409
1410         switch (frame->frametype) {
1411         case AST_FRAME_VOICE:
1412                 if (!(frame->subclass & ast->nativeformats)) {
1413                         ast_log(LOG_WARNING,
1414                                         "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
1415                                         frame->subclass, ast->nativeformats, ast->readformat,
1416                                         ast->writeformat);
1417                         return 0;
1418                 }
1419                 if (p) {
1420                         ast_mutex_lock(&p->lock);
1421                         if (p->rtp) {
1422                                 res = ast_rtp_write(p->rtp, frame);
1423                         }
1424                         ast_mutex_unlock(&p->lock);
1425                 }
1426                 break;
1427         case AST_FRAME_VIDEO:
1428                 if (p) {
1429                         ast_mutex_lock(&p->lock);
1430                         if (p->vrtp) {
1431                                 res = ast_rtp_write(p->vrtp, frame);
1432                         }
1433                         ast_mutex_unlock(&p->lock);
1434                 }
1435                 break;
1436         case AST_FRAME_IMAGE:
1437                 return 0;
1438                 break;
1439         default:
1440                 ast_log(LOG_WARNING, "Can't send %d type frames with Gtalk write\n",
1441                                 frame->frametype);
1442                 return 0;
1443         }
1444
1445         return res;
1446 }
1447
1448 static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
1449 {
1450         struct gtalk_pvt *p = newchan->tech_pvt;
1451         ast_mutex_lock(&p->lock);
1452
1453         if ((p->owner != oldchan)) {
1454                 ast_mutex_unlock(&p->lock);
1455                 return -1;
1456         }
1457         if (p->owner == oldchan)
1458                 p->owner = newchan;
1459         ast_mutex_unlock(&p->lock);
1460         return 0;
1461 }
1462
1463 static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen)
1464 {
1465         int res = 0;
1466
1467         switch (condition) {
1468         case AST_CONTROL_HOLD:
1469                 ast_moh_start(ast, data, NULL);
1470                 break;
1471         case AST_CONTROL_UNHOLD:
1472                 ast_moh_stop(ast);
1473                 break;
1474         default:
1475                 ast_log(LOG_NOTICE, "Don't know how to indicate condition '%d'\n", condition);
1476                 res = -1;
1477         }
1478
1479         return res;
1480 }
1481
1482 static int gtalk_digit_begin(struct ast_channel *chan, char digit)
1483 {
1484         return gtalk_digit(chan, digit, 0);
1485 }
1486
1487 static int gtalk_digit_end(struct ast_channel *chan, char digit, unsigned int duration)
1488 {
1489         return gtalk_digit(chan, digit, duration);
1490 }
1491
1492 static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration)
1493 {
1494         struct gtalk_pvt *p = ast->tech_pvt;
1495         struct gtalk *client = p->parent;
1496         iks *iq, *gtalk, *dtmf;
1497         char buffer[2] = {digit, '\0'};
1498         iq = iks_new("iq");
1499         gtalk = iks_new("gtalk");
1500         dtmf = iks_new("dtmf");
1501         if(!iq || !gtalk || !dtmf) {
1502                 if(iq)
1503                         iks_delete(iq);
1504                 if(gtalk)
1505                         iks_delete(gtalk);
1506                 if(dtmf)
1507                         iks_delete(dtmf);
1508                 ast_log(LOG_ERROR, "Did not send dtmf do to memory issue\n");
1509                 return -1;
1510         }
1511
1512         iks_insert_attrib(iq, "type", "set");
1513         iks_insert_attrib(iq, "to", p->them);
1514         iks_insert_attrib(iq, "from", p->us);
1515         iks_insert_attrib(iq, "id", client->connection->mid);
1516         ast_aji_increment_mid(client->connection->mid);
1517         iks_insert_attrib(gtalk, "xmlns", "http://jabber.org/protocol/gtalk");
1518         iks_insert_attrib(gtalk, "action", "session-info");
1519         iks_insert_attrib(gtalk, "initiator", p->initiator ? p->us: p->them);
1520         iks_insert_attrib(gtalk, "sid", p->sid);
1521         iks_insert_attrib(dtmf, "xmlns", "http://jabber.org/protocol/gtalk/info/dtmf");
1522         iks_insert_attrib(dtmf, "code", buffer);
1523         iks_insert_node(iq, gtalk);
1524         iks_insert_node(gtalk, dtmf);
1525
1526         ast_mutex_lock(&p->lock);
1527         if (ast->dtmff.frametype == AST_FRAME_DTMF_BEGIN || duration == 0) {
1528                 iks_insert_attrib(dtmf, "action", "button-down");
1529         } else if (ast->dtmff.frametype == AST_FRAME_DTMF_END || duration != 0) {
1530                 iks_insert_attrib(dtmf, "action", "button-up");
1531         }
1532         iks_send(client->connection->p, iq);
1533         iks_delete(iq);
1534         iks_delete(gtalk);
1535         iks_delete(dtmf);
1536         ast_mutex_unlock(&p->lock);
1537         return 0;
1538 }
1539
1540 static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen)
1541 {
1542         ast_log(LOG_NOTICE, "XXX Implement gtalk sendhtml XXX\n");
1543
1544         return -1;
1545 }
1546
1547 /* Not in use right now.
1548 static int gtalk_auto_congest(void *nothing)
1549 {
1550         struct gtalk_pvt *p = nothing;
1551
1552         ast_mutex_lock(&p->lock);
1553         if (p->owner) {
1554                 if (!ast_channel_trylock(p->owner)) {
1555                         ast_log(LOG_NOTICE, "Auto-congesting %s\n", p->owner->name);
1556                         ast_queue_control(p->owner, AST_CONTROL_CONGESTION);
1557                         ast_channel_unlock(p->owner);
1558                 }
1559         }
1560         ast_mutex_unlock(&p->lock);
1561         return 0;
1562 }
1563 */
1564
1565 /*! \brief Initiate new call, part of PBX interface
1566  *      dest is the dial string */
1567 static int gtalk_call(struct ast_channel *ast, char *dest, int timeout)
1568 {
1569         struct gtalk_pvt *p = ast->tech_pvt;
1570
1571         if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
1572                 ast_log(LOG_WARNING, "gtalk_call called on %s, neither down nor reserved\n", ast->name);
1573                 return -1;
1574         }
1575
1576         ast_setstate(ast, AST_STATE_RING);
1577         if (!p->ringrule) {
1578                 ast_copy_string(p->ring, p->parent->connection->mid, sizeof(p->ring));
1579                 p->ringrule = iks_filter_add_rule(p->parent->connection->f, gtalk_ringing_ack, p,
1580                                                         IKS_RULE_ID, p->ring, IKS_RULE_DONE);
1581         } else
1582                 ast_log(LOG_WARNING, "Whoa, already have a ring rule!\n");
1583
1584         gtalk_invite(p, p->them, p->us, p->sid, 1);
1585         gtalk_create_candidates(p->parent, p, p->sid, p->them, p->us);
1586
1587         return 0;
1588 }
1589
1590 /*! \brief Hangup a call through the gtalk proxy channel */
1591 static int gtalk_hangup(struct ast_channel *ast)
1592 {
1593         struct gtalk_pvt *p = ast->tech_pvt;
1594         struct gtalk *client;
1595
1596         ast_mutex_lock(&p->lock);
1597         client = p->parent;
1598         p->owner = NULL;
1599         ast->tech_pvt = NULL;
1600         if (!p->alreadygone)
1601                 gtalk_action(client, p, "terminate");
1602         ast_mutex_unlock(&p->lock);
1603
1604         gtalk_free_pvt(client, p);
1605         ast_module_unref(ast_module_info->self);
1606
1607         return 0;
1608 }
1609
1610 /*! \brief Part of PBX interface */
1611 static struct ast_channel *gtalk_request(const char *type, int format, void *data, int *cause)
1612 {
1613         struct gtalk_pvt *p = NULL;
1614         struct gtalk *client = NULL;
1615         char *sender = NULL, *to = NULL, *s = NULL;
1616         struct ast_channel *chan = NULL;
1617
1618         if (data) {
1619                 s = ast_strdupa(data);
1620                 if (s) {
1621                         sender = strsep(&s, "/");
1622                         if (sender && (sender[0] != '\0'))
1623                                 to = strsep(&s, "/");
1624                         if (!to) {
1625                                 ast_log(LOG_ERROR, "Bad arguments in Gtalk Dialstring: %s\n", (char*) data);
1626                                 return NULL;
1627                         }
1628                 }
1629         }
1630         client = find_gtalk(to, sender);
1631         if (!client) {
1632                 ast_log(LOG_WARNING, "Could not find recipient.\n");
1633                 return NULL;
1634         }
1635         ASTOBJ_WRLOCK(client);
1636         p = gtalk_alloc(client, strchr(sender, '@') ? sender : client->connection->jid->full, strchr(to, '@') ? to : client->user, NULL);
1637         if (p)
1638                 chan = gtalk_new(client, p, AST_STATE_DOWN, to);
1639
1640         ASTOBJ_UNLOCK(client);
1641         return chan;
1642 }
1643
1644 /*! \brief CLI command "gtalk show channels" */
1645 static int gtalk_show_channels(int fd, int argc, char **argv)
1646 {
1647 #define FORMAT  "%-30.30s  %-30.30s  %-15.15s  %-5.5s %-5.5s \n"
1648         struct gtalk_pvt *p;
1649         struct ast_channel *chan;
1650         int numchans = 0;
1651         char them[AJI_MAX_JIDLEN];
1652         char *jid = NULL;
1653         char *resource = NULL;
1654
1655         if (argc != 3)
1656                 return RESULT_SHOWUSAGE;
1657
1658         ast_mutex_lock(&gtalklock);
1659         ast_cli(fd, FORMAT, "Channel", "Jabber ID", "Resource", "Read", "Write");
1660         ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
1661                 ASTOBJ_WRLOCK(iterator);
1662                 p = iterator->p;
1663                 while(p) {
1664                         chan = p->owner;
1665                         ast_copy_string(them, p->them, sizeof(them));
1666                         jid = them;
1667                         resource = strchr(them, '/');
1668                         if (!resource)
1669                                 resource = "None";
1670                         else {
1671                                 *resource = '\0';
1672                                 resource ++;
1673                         }
1674                         if (chan)
1675                                 ast_cli(fd, FORMAT,
1676                                         chan->name,
1677                                         jid,
1678                                         resource,
1679                                         ast_getformatname(chan->readformat),
1680                                         ast_getformatname(chan->writeformat)
1681                                         );
1682                         else
1683                                 ast_log(LOG_WARNING, "No available channel\n");
1684                         numchans ++;
1685                         p = p->next;
1686                 }
1687                 ASTOBJ_UNLOCK(iterator);
1688         });
1689
1690         ast_mutex_unlock(&gtalklock);
1691
1692         ast_cli(fd, "%d active gtalk channel%s\n", numchans, (numchans != 1) ? "s" : "");
1693         return RESULT_SUCCESS;
1694 #undef FORMAT
1695 }
1696
1697 /*! \brief CLI command "gtalk show channels" */
1698 static int gtalk_do_reload(int fd, int argc, char **argv)
1699 {
1700         ast_verbose("IT DOES WORK!\n");
1701         return RESULT_SUCCESS;
1702 }
1703
1704 static int gtalk_parser(void *data, ikspak *pak)
1705 {
1706         struct gtalk *client = ASTOBJ_REF((struct gtalk *) data);
1707
1708         if (iks_find_with_attrib(pak->x, "session", "type", "initiate")) {
1709                 /* New call */
1710                 gtalk_newcall(client, pak);
1711         } else if (iks_find_with_attrib(pak->x, "session", "type", "candidates") || iks_find_with_attrib(pak->x, "session", "type", "transport-info")) {
1712                 if (option_debug > 2)
1713                         ast_log(LOG_DEBUG, "About to add candidate!\n");
1714                 gtalk_add_candidate(client, pak);
1715                 if (option_debug > 2)
1716                         ast_log(LOG_DEBUG, "Candidate Added!\n");
1717         } else if (iks_find_with_attrib(pak->x, "session", "type", "accept")) {
1718                 gtalk_is_answered(client, pak);
1719         } else if (iks_find_with_attrib(pak->x, "session", "type", "transport-accept")) {
1720                 gtalk_is_accepted(client, pak);
1721         } else if (iks_find_with_attrib(pak->x, "session", "type", "content-info") || iks_find_with_attrib(pak->x, "gtalk", "action", "session-info")) {
1722                 gtalk_handle_dtmf(client, pak);
1723         } else if (iks_find_with_attrib(pak->x, "session", "type", "terminate")) {
1724                 gtalk_hangup_farend(client, pak);
1725         } else if (iks_find_with_attrib(pak->x, "session", "type", "reject")) {
1726                 gtalk_hangup_farend(client, pak);
1727         }
1728         ASTOBJ_UNREF(client, gtalk_member_destroy);
1729         return IKS_FILTER_EAT;
1730 }
1731
1732 /* Not using this anymore probably take out soon
1733 static struct gtalk_candidate *gtalk_create_candidate(char *args)
1734 {
1735         char *name, *type, *preference, *protocol;
1736         struct gtalk_candidate *res;
1737         res = malloc(sizeof(struct gtalk_candidate));
1738         memset(res, 0, sizeof(struct gtalk_candidate));
1739         if (args)
1740                 name = args;
1741         if ((args = strchr(args, ','))) {
1742                 *args = '\0';
1743                 args++;
1744                 preference = args;
1745         }
1746         if ((args = strchr(args, ','))) {
1747                 *args = '\0';
1748                 args++;
1749                 protocol = args;
1750         }
1751         if ((args = strchr(args, ','))) {
1752                 *args = '\0';
1753                 args++;
1754                 type = args;
1755         }
1756         if (name)
1757                 ast_copy_string(res->name, name, sizeof(res->name));
1758         if (preference) {
1759                 res->preference = atof(preference);
1760         }
1761         if (protocol) {
1762                 if (!strcasecmp("udp", protocol))
1763                         res->protocol = AJI_PROTOCOL_UDP;
1764                 if (!strcasecmp("ssltcp", protocol))
1765                         res->protocol = AJI_PROTOCOL_SSLTCP;
1766         }
1767         if (type) {
1768                 if (!strcasecmp("stun", type))
1769                         res->type = AJI_CONNECT_STUN;
1770                 if (!strcasecmp("local", type))
1771                         res->type = AJI_CONNECT_LOCAL;
1772                 if (!strcasecmp("relay", type))
1773                         res->type = AJI_CONNECT_RELAY;
1774         }
1775
1776         return res;
1777 }
1778 */
1779
1780 static int gtalk_create_member(char *label, struct ast_variable *var, int allowguest,
1781                                                                 struct ast_codec_pref prefs, char *context,
1782                                                                 struct gtalk *member)
1783 {
1784         struct aji_client *client;
1785
1786         if (!member)
1787                 ast_log(LOG_WARNING, "Out of memory.\n");
1788
1789         ast_copy_string(member->name, label, sizeof(member->name));
1790         ast_copy_string(member->user, label, sizeof(member->user));
1791         ast_copy_string(member->context, context, sizeof(member->context));
1792         member->allowguest = allowguest;
1793         member->prefs = prefs;
1794         while (var) {
1795 #if 0
1796                 struct gtalk_candidate *candidate = NULL;
1797 #endif
1798                 if (!strcasecmp(var->name, "username"))
1799                         ast_copy_string(member->user, var->value, sizeof(member->user));
1800                 else if (!strcasecmp(var->name, "disallow"))
1801                         ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 0);
1802                 else if (!strcasecmp(var->name, "allow"))
1803                         ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 1);
1804                 else if (!strcasecmp(var->name, "context"))
1805                         ast_copy_string(member->context, var->value, sizeof(member->context));
1806 #if 0
1807                 else if (!strcasecmp(var->name, "candidate")) {
1808                         candidate = gtalk_create_candidate(var->value);
1809                         if (candidate) {
1810                                 candidate->next = member->ourcandidates;
1811                                 member->ourcandidates = candidate;
1812                         }
1813                 }
1814 #endif
1815                 else if (!strcasecmp(var->name, "connection")) {
1816                         if ((client = ast_aji_get_client(var->value))) {
1817                                 member->connection = client;
1818                                 iks_filter_add_rule(client->f, gtalk_parser, member,
1819                                                     IKS_RULE_TYPE, IKS_PAK_IQ,
1820                                                     IKS_RULE_FROM_PARTIAL, member->user,
1821                                                     IKS_RULE_NS, "http://www.google.com/session",
1822                                                     IKS_RULE_DONE);
1823
1824                         } else {
1825                                 ast_log(LOG_ERROR, "connection referenced not found!\n");
1826                                 return 0;
1827                         }
1828                 }
1829                 var = var->next;
1830         }
1831         if (member->connection && member->user)
1832                 member->buddy = ASTOBJ_CONTAINER_FIND(&member->connection->buddies, member->user);
1833         else {
1834                 ast_log(LOG_ERROR, "No Connection or Username!\n");
1835         }
1836         return 1;
1837 }
1838
1839 static int gtalk_load_config(void)
1840 {
1841         char *cat = NULL;
1842         struct ast_config *cfg = NULL;
1843         char context[AST_MAX_CONTEXT];
1844         int allowguest = 1;
1845         struct ast_variable *var;
1846         struct gtalk *member;
1847         struct ast_codec_pref prefs;
1848         struct aji_client_container *clients;
1849         struct gtalk_candidate *global_candidates = NULL;
1850         struct hostent *hp;
1851         struct ast_hostent ahp;
1852
1853         cfg = ast_config_load(GOOGLE_CONFIG);
1854         if (!cfg)
1855                 return 0;
1856
1857         /* Copy the default jb config over global_jbconf */
1858         memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
1859
1860         cat = ast_category_browse(cfg, NULL);
1861         for (var = ast_variable_browse(cfg, "general"); var; var = var->next) {
1862                 /* handle jb conf */
1863                 if (!ast_jb_read_conf(&global_jbconf, var->name, var->value))
1864                         continue;
1865
1866                 if (!strcasecmp(var->name, "allowguest"))
1867                         allowguest =
1868                                 (ast_true(ast_variable_retrieve(cfg, "general", "allowguest"))) ? 1 : 0;
1869                 else if (!strcasecmp(var->name, "disallow"))
1870                         ast_parse_allow_disallow(&prefs, &global_capability, var->value, 0);
1871                 else if (!strcasecmp(var->name, "allow"))
1872                         ast_parse_allow_disallow(&prefs, &global_capability, var->value, 1);
1873                 else if (!strcasecmp(var->name, "context"))
1874                         ast_copy_string(context, var->value, sizeof(context));
1875                 else if (!strcasecmp(var->name, "bindaddr")) {
1876                         if (!(hp = ast_gethostbyname(var->value, &ahp))) {
1877                                 ast_log(LOG_WARNING, "Invalid address: %s\n", var->value);
1878                         } else {
1879                                 memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
1880                         }
1881                 }
1882 /*  Idea to allow for custom candidates  */
1883 /*
1884                 else if (!strcasecmp(var->name, "candidate")) {
1885                         candidate = gtalk_create_candidate(var->value);
1886                         if (candidate) {
1887                                 candidate->next = global_candidates;
1888                                 global_candidates = candidate;
1889                         }
1890                 }
1891 */
1892         }
1893         while (cat) {
1894                 if (strcasecmp(cat, "general")) {
1895                         var = ast_variable_browse(cfg, cat);
1896                         member = (struct gtalk *) malloc(sizeof(struct gtalk));
1897                         memset(member, 0, sizeof(struct gtalk));
1898                         ASTOBJ_INIT(member);
1899                         ASTOBJ_WRLOCK(member);
1900                         if (!strcasecmp(cat, "guest")) {
1901                                 ast_copy_string(member->name, "guest", sizeof(member->name));
1902                                 ast_copy_string(member->user, "guest", sizeof(member->user));
1903                                 ast_copy_string(member->context, context, sizeof(member->context));
1904                                 member->allowguest = allowguest;
1905                                 member->prefs = prefs;
1906                                 while (var) {
1907                                         if (!strcasecmp(var->name, "disallow"))
1908                                                 ast_parse_allow_disallow(&member->prefs, &member->capability,
1909                                                                                                  var->value, 0);
1910                                         else if (!strcasecmp(var->name, "allow"))
1911                                                 ast_parse_allow_disallow(&member->prefs, &member->capability,
1912                                                                                                  var->value, 1);
1913                                         else if (!strcasecmp(var->name, "context"))
1914                                                 ast_copy_string(member->context, var->value,
1915                                                                                 sizeof(member->context));
1916 /*  Idea to allow for custom candidates  */
1917 /*
1918                                         else if (!strcasecmp(var->name, "candidate")) {
1919                                                 candidate = gtalk_create_candidate(var->value);
1920                                                 if (candidate) {
1921                                                         candidate->next = member->ourcandidates;
1922                                                         member->ourcandidates = candidate;
1923                                                 }
1924                                         }
1925 */
1926                                         var = var->next;
1927                                 }
1928                                 ASTOBJ_UNLOCK(member);
1929                                 clients = ast_aji_get_clients();
1930                                 if (clients) {
1931                                         ASTOBJ_CONTAINER_TRAVERSE(clients, 1, {
1932                                                 ASTOBJ_WRLOCK(iterator);
1933                                                 ASTOBJ_WRLOCK(member);
1934                                                 member->connection = iterator;
1935                                                 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);
1936                                                 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);
1937                                                 ASTOBJ_UNLOCK(member);
1938                                                 ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
1939                                                 ASTOBJ_UNLOCK(iterator);
1940                                         });
1941                                 } else {
1942                                         ASTOBJ_UNLOCK(member);
1943                                         ASTOBJ_UNREF(member, gtalk_member_destroy);
1944                                 }
1945                         } else {
1946                                 ASTOBJ_UNLOCK(member);
1947                                 if (gtalk_create_member(cat, var, allowguest, prefs, context, member))
1948                                         ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
1949                                 ASTOBJ_UNREF(member, gtalk_member_destroy);
1950                         }
1951                 }
1952                 cat = ast_category_browse(cfg, cat);
1953         }
1954         gtalk_free_candidates(global_candidates);
1955         return 1;
1956 }
1957
1958 /*! \brief Load module into PBX, register channel */
1959 static int load_module(void)
1960 {
1961         char *jabber_loaded = ast_module_helper("", "res_jabber.so", 0, 0, 0, 0);
1962         free(jabber_loaded);
1963         if (!jabber_loaded) {
1964                 /* If embedded, check for a different module name */
1965                 jabber_loaded = ast_module_helper("", "res_jabber", 0, 0, 0, 0);
1966                 free(jabber_loaded);
1967                 if (!jabber_loaded) {
1968                         ast_log(LOG_ERROR, "chan_gtalk.so depends upon res_jabber.so\n");
1969                         return AST_MODULE_LOAD_DECLINE;
1970                 }
1971         }
1972
1973 #ifdef HAVE_GNUTLS
1974         gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
1975 #endif /* HAVE_GNUTLS */
1976
1977         ASTOBJ_CONTAINER_INIT(&gtalk_list);
1978         if (!gtalk_load_config()) {
1979                 ast_log(LOG_ERROR, "Unable to read config file %s. Not loading module.\n", GOOGLE_CONFIG);
1980                 return 0;
1981         }
1982
1983         sched = sched_context_create();
1984         if (!sched)
1985                 ast_log(LOG_WARNING, "Unable to create schedule context\n");
1986
1987         io = io_context_create();
1988         if (!io)
1989                 ast_log(LOG_WARNING, "Unable to create I/O context\n");
1990
1991         if (ast_find_ourip(&__ourip, bindaddr)) {
1992                 ast_log(LOG_WARNING, "Unable to get own IP address, Gtalk disabled\n");
1993                 return 0;
1994         }
1995
1996         ast_rtp_proto_register(&gtalk_rtp);
1997         ast_cli_register_multiple(gtalk_cli, sizeof(gtalk_cli) / sizeof(gtalk_cli[0]));
1998
1999         /* Make sure we can register our channel type */
2000         if (ast_channel_register(&gtalk_tech)) {
2001                 ast_log(LOG_ERROR, "Unable to register channel class %s\n", gtalk_tech.type);
2002                 return -1;
2003         }
2004         return 0;
2005 }
2006
2007 /*! \brief Reload module */
2008 static int reload(void)
2009 {
2010         return 0;
2011 }
2012
2013 /*! \brief Unload the gtalk channel from Asterisk */
2014 static int unload_module(void)
2015 {
2016         struct gtalk_pvt *privates = NULL;
2017         ast_cli_unregister_multiple(gtalk_cli, sizeof(gtalk_cli) / sizeof(gtalk_cli[0]));
2018         /* First, take us out of the channel loop */
2019         ast_channel_unregister(&gtalk_tech);
2020         ast_rtp_proto_unregister(&gtalk_rtp);
2021
2022         if (!ast_mutex_lock(&gtalklock)) {
2023                 /* Hangup all interfaces if they have an owner */
2024                 ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
2025                         ASTOBJ_WRLOCK(iterator);
2026                         privates = iterator->p;
2027                         while(privates) {
2028                                 if (privates->owner)
2029                                         ast_softhangup(privates->owner, AST_SOFTHANGUP_APPUNLOAD);
2030                                 privates = privates->next;
2031                         }
2032                         iterator->p = NULL;
2033                         ASTOBJ_UNLOCK(iterator);
2034                 });
2035                 ast_mutex_unlock(&gtalklock);
2036         } else {
2037                 ast_log(LOG_WARNING, "Unable to lock the monitor\n");
2038                 return -1;
2039         }
2040         ASTOBJ_CONTAINER_DESTROYALL(&gtalk_list, gtalk_member_destroy);
2041         ASTOBJ_CONTAINER_DESTROY(&gtalk_list);
2042         return 0;
2043 }
2044
2045 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Gtalk Channel Driver",
2046                 .load = load_module,
2047                 .unload = unload_module,
2048                 .reload = reload,
2049                );