Mon Mar 31 07:37:57 2008

Asterisk developer's documentation


chan_gtalk.c

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00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright (C) 1999 - 2005, Digium, Inc.
00005  *
00006  * Matt O'Gorman <mogorman@digium.com>
00007  *
00008  * See http://www.asterisk.org for more information about
00009  * the Asterisk project. Please do not directly contact
00010  * any of the maintainers of this project for assistance;
00011  * the project provides a web site, mailing lists and IRC
00012  * channels for your use.
00013  *
00014  * This program is free software, distributed under the terms of
00015  * the GNU General Public License Version 2. See the LICENSE file
00016  * at the top of the source tree.
00017  */
00018 
00019 /*! \file
00020  *
00021  * \author Matt O'Gorman <mogorman@digium.com>
00022  *
00023  * \brief Gtalk Channel Driver, until google/libjingle works with jingle spec
00024  * 
00025  * \ingroup channel_drivers
00026  */
00027 
00028 /*** MODULEINFO
00029    <depend>iksemel</depend>
00030    <use>gnutls</use>
00031  ***/
00032 
00033 #include "asterisk.h"
00034 
00035 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
00036 
00037 #include <stdlib.h>
00038 #include <stdio.h>
00039 #include <string.h>
00040 #include <unistd.h>
00041 #include <sys/socket.h>
00042 #include <errno.h>
00043 #include <stdlib.h>
00044 #include <fcntl.h>
00045 #include <netdb.h>
00046 #include <netinet/in.h>
00047 #include <arpa/inet.h>
00048 #include <sys/signal.h>
00049 #include <iksemel.h>
00050 #include <pthread.h>
00051 
00052 #ifdef HAVE_GNUTLS
00053 #include <gcrypt.h>
00054 GCRY_THREAD_OPTION_PTHREAD_IMPL;
00055 #endif /* HAVE_GNUTLS */
00056 
00057 #include "asterisk/lock.h"
00058 #include "asterisk/channel.h"
00059 #include "asterisk/config.h"
00060 #include "asterisk/logger.h"
00061 #include "asterisk/module.h"
00062 #include "asterisk/pbx.h"
00063 #include "asterisk/options.h"
00064 #include "asterisk/lock.h"
00065 #include "asterisk/sched.h"
00066 #include "asterisk/io.h"
00067 #include "asterisk/rtp.h"
00068 #include "asterisk/acl.h"
00069 #include "asterisk/callerid.h"
00070 #include "asterisk/file.h"
00071 #include "asterisk/cli.h"
00072 #include "asterisk/app.h"
00073 #include "asterisk/musiconhold.h"
00074 #include "asterisk/manager.h"
00075 #include "asterisk/stringfields.h"
00076 #include "asterisk/utils.h"
00077 #include "asterisk/causes.h"
00078 #include "asterisk/astobj.h"
00079 #include "asterisk/abstract_jb.h"
00080 #include "asterisk/jabber.h"
00081 
00082 #define GOOGLE_CONFIG "gtalk.conf"
00083 
00084 #define GOOGLE_NS "http://www.google.com/session"
00085 
00086 
00087 /*! Global jitterbuffer configuration - by default, jb is disabled */
00088 static struct ast_jb_conf default_jbconf =
00089 {
00090    .flags = 0,
00091    .max_size = -1,
00092    .resync_threshold = -1,
00093    .impl = ""
00094 };
00095 static struct ast_jb_conf global_jbconf;
00096 
00097 enum gtalk_protocol {
00098    AJI_PROTOCOL_UDP = 1,
00099    AJI_PROTOCOL_SSLTCP = 2,
00100 };
00101 
00102 enum gtalk_connect_type {
00103    AJI_CONNECT_STUN = 1,
00104    AJI_CONNECT_LOCAL = 2,
00105    AJI_CONNECT_RELAY = 3,
00106 };
00107 
00108 struct gtalk_pvt {
00109    ast_mutex_t lock;                /*!< Channel private lock */
00110    time_t laststun;
00111    struct gtalk *parent;            /*!< Parent client */
00112    char sid[100];
00113    char us[AJI_MAX_JIDLEN];
00114    char them[AJI_MAX_JIDLEN];
00115    char ring[10];                   /*!< Message ID of ring */
00116    iksrule *ringrule;               /*!< Rule for matching RING request */
00117    int initiator;                   /*!< If we're the initiator */
00118    int alreadygone;
00119    int capability;
00120    struct ast_codec_pref prefs;
00121    struct gtalk_candidate *theircandidates;
00122    struct gtalk_candidate *ourcandidates;
00123    char cid_num[80];                /*!< Caller ID num */
00124    char cid_name[80];               /*!< Caller ID name */
00125    char exten[80];                  /*!< Called extension */
00126    struct ast_channel *owner;       /*!< Master Channel */
00127    struct ast_rtp *rtp;             /*!< RTP audio session */
00128    struct ast_rtp *vrtp;            /*!< RTP video session */
00129    int jointcapability;             /*!< Supported capability at both ends (codecs ) */
00130    int peercapability;
00131    struct gtalk_pvt *next; /* Next entity */
00132 };
00133 
00134 struct gtalk_candidate {
00135    char name[100];
00136    enum gtalk_protocol protocol;
00137    double preference;
00138    char username[100];
00139    char password[100];
00140    enum gtalk_connect_type type;
00141    char network[6];
00142    int generation;
00143    char ip[16];
00144    int port;
00145    int receipt;
00146    struct gtalk_candidate *next;
00147 };
00148 
00149 struct gtalk {
00150    ASTOBJ_COMPONENTS(struct gtalk);
00151    struct aji_client *connection;
00152    struct aji_buddy *buddy;
00153    struct gtalk_pvt *p;
00154    struct ast_codec_pref prefs;
00155    int amaflags;        /*!< AMA Flags */
00156    char user[AJI_MAX_JIDLEN];
00157    char context[AST_MAX_CONTEXT];
00158    char accountcode[AST_MAX_ACCOUNT_CODE];   /*!< Account code */
00159    int capability;
00160    ast_group_t callgroup;  /*!< Call group */
00161    ast_group_t pickupgroup;   /*!< Pickup group */
00162    int callingpres;     /*!< Calling presentation */
00163    int allowguest;
00164    char language[MAX_LANGUAGE];  /*!<  Default language for prompts */
00165    char musicclass[MAX_MUSICCLASS]; /*!<  Music on Hold class */
00166 };
00167 
00168 struct gtalk_container {
00169    ASTOBJ_CONTAINER_COMPONENTS(struct gtalk);
00170 };
00171 
00172 static const char desc[] = "Gtalk Channel";
00173 
00174 static int global_capability = AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_GSM | AST_FORMAT_H263;
00175 
00176 AST_MUTEX_DEFINE_STATIC(gtalklock); /*!< Protect the interface list (of gtalk_pvt's) */
00177 
00178 /* Forward declarations */
00179 static struct ast_channel *gtalk_request(const char *type, int format, void *data, int *cause);
00180 static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration);
00181 static int gtalk_digit_begin(struct ast_channel *ast, char digit);
00182 static int gtalk_digit_end(struct ast_channel *ast, char digit, unsigned int duration);
00183 static int gtalk_call(struct ast_channel *ast, char *dest, int timeout);
00184 static int gtalk_hangup(struct ast_channel *ast);
00185 static int gtalk_answer(struct ast_channel *ast);
00186 static int gtalk_newcall(struct gtalk *client, ikspak *pak);
00187 static struct ast_frame *gtalk_read(struct ast_channel *ast);
00188 static int gtalk_write(struct ast_channel *ast, struct ast_frame *f);
00189 static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen);
00190 static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
00191 static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen);
00192 static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid);
00193 static int gtalk_do_reload(int fd, int argc, char **argv);
00194 static int gtalk_show_channels(int fd, int argc, char **argv);
00195 /*----- RTP interface functions */
00196 static int gtalk_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp,
00197                         struct ast_rtp *vrtp, int codecs, int nat_active);
00198 static enum ast_rtp_get_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp);
00199 static int gtalk_get_codec(struct ast_channel *chan);
00200 
00201 /*! \brief PBX interface structure for channel registration */
00202 static const struct ast_channel_tech gtalk_tech = {
00203    .type = "Gtalk",
00204    .description = "Gtalk Channel Driver",
00205    .capabilities = ((AST_FORMAT_MAX_AUDIO << 1) - 1),
00206    .requester = gtalk_request,
00207    .send_digit_begin = gtalk_digit_begin,
00208    .send_digit_end = gtalk_digit_end,
00209    .bridge = ast_rtp_bridge,
00210    .call = gtalk_call,
00211    .hangup = gtalk_hangup,
00212    .answer = gtalk_answer,
00213    .read = gtalk_read,
00214    .write = gtalk_write,
00215    .exception = gtalk_read,
00216    .indicate = gtalk_indicate,
00217    .fixup = gtalk_fixup,
00218    .send_html = gtalk_sendhtml,
00219    .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER
00220 };
00221 
00222 static struct sockaddr_in bindaddr = { 0, }; /*!< The address we bind to */
00223 
00224 static struct sched_context *sched; /*!< The scheduling context */
00225 static struct io_context *io; /*!< The IO context */
00226 static struct in_addr __ourip;
00227 
00228 
00229 /*! \brief RTP driver interface */
00230 static struct ast_rtp_protocol gtalk_rtp = {
00231    type: "Gtalk",
00232    get_rtp_info: gtalk_get_rtp_peer,
00233    set_rtp_peer: gtalk_set_rtp_peer,
00234    get_codec: gtalk_get_codec,
00235 };
00236 
00237 static char show_channels_usage[] = 
00238 "Usage: gtalk show channels\n" 
00239 "       Shows current state of the Gtalk channels.\n";
00240 
00241 static char reload_usage[] = 
00242 "Usage: gtalk reload\n" 
00243 "       Reload gtalk channel driver.\n";
00244 
00245 
00246 static struct ast_cli_entry gtalk_cli[] = {
00247    {{ "gtalk", "reload", NULL}, gtalk_do_reload, "Reload GoogleTalk configuration", reload_usage },
00248    {{ "gtalk", "show", "channels", NULL}, gtalk_show_channels, "Show GoogleTalk channels", show_channels_usage },
00249  };
00250 
00251 
00252 
00253 static char externip[16];
00254 
00255 static struct gtalk_container gtalk_list;
00256 
00257 static void gtalk_member_destroy(struct gtalk *obj)
00258 {
00259    free(obj);
00260 }
00261 
00262 static struct gtalk *find_gtalk(char *name, char *connection)
00263 {
00264    struct gtalk *gtalk = NULL;
00265    char *domain = NULL , *s = NULL;
00266 
00267    if(strchr(connection, '@')) {
00268       s = ast_strdupa(connection);
00269       domain = strsep(&s, "@");
00270       ast_verbose("OOOOH domain = %s\n", domain);
00271    }
00272    gtalk = ASTOBJ_CONTAINER_FIND(&gtalk_list, name);
00273    if (!gtalk && strchr(name, '@'))
00274       gtalk = ASTOBJ_CONTAINER_FIND_FULL(&gtalk_list, name, user,,, strcasecmp);
00275 
00276    if (!gtalk) {           /* guest call */
00277       ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
00278          ASTOBJ_RDLOCK(iterator);
00279          if (!strcasecmp(iterator->name, "guest")) {
00280             if (!strcasecmp(iterator->connection->jid->partial, connection)) {
00281                gtalk = iterator;
00282             } else if (!strcasecmp(iterator->connection->name, connection)) {
00283                gtalk = iterator;
00284             } else if (iterator->connection->component && !strcasecmp(iterator->connection->user,domain)) {
00285                gtalk = iterator;
00286             }
00287          }
00288          ASTOBJ_UNLOCK(iterator);
00289 
00290          if (gtalk)
00291             break;
00292       });
00293 
00294    }
00295    return gtalk;
00296 }
00297 
00298 
00299 static int add_codec_to_answer(const struct gtalk_pvt *p, int codec, iks *dcodecs)
00300 {
00301    char *format = ast_getformatname(codec);
00302 
00303    if (!strcasecmp("ulaw", format)) {
00304       iks *payload_eg711u, *payload_pcmu;
00305       payload_pcmu = iks_new("payload-type");
00306       payload_eg711u = iks_new("payload-type");
00307    
00308       if(!payload_eg711u || !payload_pcmu) {
00309          if(payload_pcmu)
00310             iks_delete(payload_pcmu);
00311          if(payload_eg711u)
00312             iks_delete(payload_eg711u);
00313          ast_log(LOG_WARNING,"Failed to allocate iks node");
00314          return -1;
00315       }
00316       iks_insert_attrib(payload_pcmu, "id", "0");
00317       iks_insert_attrib(payload_pcmu, "name", "PCMU");
00318       iks_insert_attrib(payload_pcmu, "clockrate","8000");
00319       iks_insert_attrib(payload_pcmu, "bitrate","64000");
00320       iks_insert_attrib(payload_eg711u, "id", "100");
00321       iks_insert_attrib(payload_eg711u, "name", "EG711U");
00322       iks_insert_attrib(payload_eg711u, "clockrate","8000");
00323       iks_insert_attrib(payload_eg711u, "bitrate","64000");
00324       iks_insert_node(dcodecs, payload_pcmu);
00325       iks_insert_node(dcodecs, payload_eg711u);
00326    }
00327    if (!strcasecmp("alaw", format)) {
00328       iks *payload_eg711a, *payload_pcma;
00329       payload_pcma = iks_new("payload-type");
00330       payload_eg711a = iks_new("payload-type");
00331       if(!payload_eg711a || !payload_pcma) {
00332          if(payload_eg711a)
00333             iks_delete(payload_eg711a);
00334          if(payload_pcma)
00335             iks_delete(payload_pcma);
00336          ast_log(LOG_WARNING,"Failed to allocate iks node");
00337          return -1;
00338       }
00339       iks_insert_attrib(payload_pcma, "id", "8");
00340       iks_insert_attrib(payload_pcma, "name", "PCMA");
00341       iks_insert_attrib(payload_pcma, "clockrate","8000");
00342       iks_insert_attrib(payload_pcma, "bitrate","64000");
00343       payload_eg711a = iks_new("payload-type");
00344       iks_insert_attrib(payload_eg711a, "id", "101");
00345       iks_insert_attrib(payload_eg711a, "name", "EG711A");
00346       iks_insert_attrib(payload_eg711a, "clockrate","8000");
00347       iks_insert_attrib(payload_eg711a, "bitrate","64000");
00348       iks_insert_node(dcodecs, payload_pcma);
00349       iks_insert_node(dcodecs, payload_eg711a);
00350    }
00351    if (!strcasecmp("ilbc", format)) {
00352       iks *payload_ilbc = iks_new("payload-type");
00353       if(!payload_ilbc) {
00354          ast_log(LOG_WARNING,"Failed to allocate iks node");
00355          return -1;
00356       }
00357       iks_insert_attrib(payload_ilbc, "id", "97");
00358       iks_insert_attrib(payload_ilbc, "name", "iLBC");
00359       iks_insert_attrib(payload_ilbc, "clockrate","8000");
00360       iks_insert_attrib(payload_ilbc, "bitrate","13300");
00361       iks_insert_node(dcodecs, payload_ilbc);
00362    }
00363    if (!strcasecmp("g723", format)) {
00364       iks *payload_g723 = iks_new("payload-type");
00365       if(!payload_g723) {
00366          ast_log(LOG_WARNING,"Failed to allocate iks node");
00367          return -1;
00368       }
00369       iks_insert_attrib(payload_g723, "id", "4");
00370       iks_insert_attrib(payload_g723, "name", "G723");
00371       iks_insert_attrib(payload_g723, "clockrate","8000");
00372       iks_insert_attrib(payload_g723, "bitrate","6300");
00373       iks_insert_node(dcodecs, payload_g723);
00374    }
00375    if (!strcasecmp("speex", format)) {
00376       iks *payload_speex = iks_new("payload-type");
00377       if(!payload_speex) {
00378          ast_log(LOG_WARNING,"Failed to allocate iks node");
00379          return -1;
00380       }
00381       iks_insert_attrib(payload_speex, "id", "110");
00382       iks_insert_attrib(payload_speex, "name", "speex");
00383       iks_insert_attrib(payload_speex, "clockrate","8000");
00384       iks_insert_attrib(payload_speex, "bitrate","11000");
00385       iks_insert_node(dcodecs, payload_speex);
00386    }
00387    ast_rtp_lookup_code(p->rtp, 1, codec);
00388    return 0;
00389 }
00390 
00391 static int gtalk_invite(struct gtalk_pvt *p, char *to, char *from, char *sid, int initiator)
00392 {
00393    struct gtalk *client = p->parent;
00394    iks *iq, *gtalk, *dcodecs, *payload_telephone, *transport;
00395    int x;
00396    int pref_codec = 0;
00397    int alreadysent = 0;
00398 
00399 
00400    iq = iks_new("iq");
00401    gtalk = iks_new("session");
00402    dcodecs = iks_new("description");
00403    transport = iks_new("transport");
00404    payload_telephone = iks_new("payload-type");
00405    if (!(iq && gtalk && dcodecs && transport && payload_telephone)){
00406       if(iq)
00407          iks_delete(iq);
00408       if(gtalk)
00409          iks_delete(gtalk);
00410       if(dcodecs)
00411          iks_delete(dcodecs);
00412       if(transport)
00413          iks_delete(transport);
00414       if(payload_telephone)
00415          iks_delete(payload_telephone);
00416 
00417       ast_log(LOG_ERROR, "Could not allocate iksemel nodes\n");
00418       return 0;
00419    }
00420    iks_insert_attrib(dcodecs, "xmlns", "http://www.google.com/session/phone");
00421    iks_insert_attrib(dcodecs, "xml:lang", "en");
00422 
00423    for (x = 0; x < 32; x++) {
00424       if (!(pref_codec = ast_codec_pref_index(&client->prefs, x)))
00425          break;
00426       if (!(client->capability & pref_codec))
00427          continue;
00428       if (alreadysent & pref_codec)
00429          continue;
00430       add_codec_to_answer(p, pref_codec, dcodecs);
00431       alreadysent |= pref_codec;
00432    }
00433    
00434    iks_insert_attrib(payload_telephone, "id", "106");
00435    iks_insert_attrib(payload_telephone, "name", "telephone-event");
00436    iks_insert_attrib(payload_telephone, "clockrate", "8000");
00437    
00438    iks_insert_attrib(transport,"xmlns","http://www.google.com/transport/p2p");
00439    
00440    iks_insert_attrib(iq, "type", "set");
00441    iks_insert_attrib(iq, "to", to);
00442    iks_insert_attrib(iq, "from", from);
00443    iks_insert_attrib(iq, "id", client->connection->mid);
00444    ast_aji_increment_mid(client->connection->mid);
00445 
00446    iks_insert_attrib(gtalk, "xmlns", "http://www.google.com/session");
00447    iks_insert_attrib(gtalk, "type",initiator ? "initiate": "accept");
00448    iks_insert_attrib(gtalk, "initiator", initiator ? from : to);
00449    iks_insert_attrib(gtalk, "id", sid);
00450    iks_insert_node(iq, gtalk);
00451    iks_insert_node(gtalk, dcodecs);
00452    iks_insert_node(gtalk, transport);
00453    iks_insert_node(dcodecs, payload_telephone);
00454 
00455    iks_send(client->connection->p, iq);
00456    iks_delete(payload_telephone);
00457    iks_delete(transport);
00458    iks_delete(dcodecs);
00459    iks_delete(gtalk);
00460    iks_delete(iq);
00461    return 1;
00462 }
00463 
00464 static int gtalk_invite_response(struct gtalk_pvt *p, char *to , char *from, char *sid, int initiator)
00465 {
00466    iks *iq, *session, *transport;
00467    iq = iks_new("iq");
00468    session = iks_new("session");
00469    transport = iks_new("transport");
00470    if(!(iq && session && transport)) {
00471       if(iq)
00472          iks_delete(iq);
00473       if(session)
00474          iks_delete(session);
00475       if(transport)
00476          iks_delete(transport);
00477       ast_log(LOG_ERROR, " Unable to allocate IKS node\n");
00478       return -1;
00479    }
00480    iks_insert_attrib(iq, "from", from);
00481    iks_insert_attrib(iq, "to", to);
00482    iks_insert_attrib(iq, "type", "set");
00483    iks_insert_attrib(iq, "id",p->parent->connection->mid);
00484    ast_aji_increment_mid(p->parent->connection->mid);
00485    iks_insert_attrib(session, "type", "transport-accept");
00486    iks_insert_attrib(session, "id", sid);
00487    iks_insert_attrib(session, "initiator", initiator ? from : to);
00488    iks_insert_attrib(session, "xmlns", "http://www.google.com/session");
00489    iks_insert_attrib(transport, "xmlns", "http://www.google.com/transport/p2p");
00490    iks_insert_node(iq,session);
00491    iks_insert_node(session,transport);
00492    iks_send(p->parent->connection->p, iq);
00493    iks_delete(transport);
00494    iks_delete(session);
00495    iks_delete(iq);
00496    return 1;
00497 
00498 }
00499 
00500 static int gtalk_ringing_ack(void *data, ikspak *pak)
00501 {
00502    struct gtalk_pvt *p = data;
00503 
00504    if (p->ringrule)
00505       iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
00506    p->ringrule = NULL;
00507    if (p->owner)
00508       ast_queue_control(p->owner, AST_CONTROL_RINGING);
00509    return IKS_FILTER_EAT;
00510 }
00511 
00512 static int gtalk_answer(struct ast_channel *ast)
00513 {
00514    struct gtalk_pvt *p = ast->tech_pvt;
00515    int res = 0;
00516    
00517    if (option_debug)
00518       ast_log(LOG_DEBUG, "Answer!\n");
00519    ast_mutex_lock(&p->lock);
00520    gtalk_invite(p, p->them, p->us,p->sid, 0);
00521    ast_mutex_unlock(&p->lock);
00522    return res;
00523 }
00524 
00525 static enum ast_rtp_get_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp)
00526 {
00527    struct gtalk_pvt *p = chan->tech_pvt;
00528    enum ast_rtp_get_result res = AST_RTP_GET_FAILED;
00529 
00530    if (!p)
00531       return res;
00532 
00533    ast_mutex_lock(&p->lock);
00534    if (p->rtp){
00535       *rtp = p->rtp;
00536       res = AST_RTP_TRY_PARTIAL;
00537    }
00538    ast_mutex_unlock(&p->lock);
00539 
00540    return res;
00541 }
00542 
00543 static int gtalk_get_codec(struct ast_channel *chan)
00544 {
00545    struct gtalk_pvt *p = chan->tech_pvt;
00546    return p->peercapability;
00547 }
00548 
00549 static int gtalk_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp, int codecs, int nat_active)
00550 {
00551    struct gtalk_pvt *p;
00552 
00553    p = chan->tech_pvt;
00554    if (!p)
00555       return -1;
00556    ast_mutex_lock(&p->lock);
00557 
00558 /* if (rtp)
00559       ast_rtp_get_peer(rtp, &p->redirip);
00560    else
00561       memset(&p->redirip, 0, sizeof(p->redirip));
00562    p->redircodecs = codecs; */
00563 
00564    /* Reset lastrtprx timer */
00565    ast_mutex_unlock(&p->lock);
00566    return 0;
00567 }
00568 
00569 static int gtalk_response(struct gtalk *client, char *from, ikspak *pak, const char *reasonstr, const char *reasonstr2)
00570 {
00571    iks *response = NULL, *error = NULL, *reason = NULL;
00572    int res = -1;
00573 
00574    response = iks_new("iq");
00575    if (response) {
00576       iks_insert_attrib(response, "type", "result");
00577       iks_insert_attrib(response, "from", from);
00578       iks_insert_attrib(response, "to", iks_find_attrib(pak->x, "from"));
00579       iks_insert_attrib(response, "id", iks_find_attrib(pak->x, "id"));
00580       if (reasonstr) {
00581          error = iks_new("error");
00582          if (error) {
00583             iks_insert_attrib(error, "type", "cancel");
00584             reason = iks_new(reasonstr);
00585             if (reason)
00586                iks_insert_node(error, reason);
00587             iks_insert_node(response, error);
00588          }
00589       }
00590       iks_send(client->connection->p, response);
00591       if (reason)
00592          iks_delete(reason);
00593       if (error)
00594          iks_delete(error);
00595       iks_delete(response);
00596       res = 0;
00597    }
00598    return res;
00599 }
00600 
00601 static int gtalk_is_answered(struct gtalk *client, ikspak *pak)
00602 {
00603    struct gtalk_pvt *tmp;
00604    char *from;
00605    ast_log(LOG_DEBUG, "The client is %s\n", client->name);
00606    /* Make sure our new call doesn't exist yet */
00607    for (tmp = client->p; tmp; tmp = tmp->next) {
00608       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
00609          break;
00610    }
00611    
00612    from = iks_find_attrib(pak->x, "to");
00613    if(!from)
00614       from = client->connection->jid->full;
00615 
00616    if (tmp) {
00617       if (tmp->owner)
00618          ast_queue_control(tmp->owner, AST_CONTROL_ANSWER);
00619    } else
00620       ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
00621    gtalk_response(client, from, pak, NULL, NULL);
00622    return 1;
00623 }
00624 
00625 static int gtalk_is_accepted(struct gtalk *client, ikspak *pak)
00626 {
00627    struct gtalk_pvt *tmp;
00628    char *from;
00629 
00630    ast_log(LOG_DEBUG, "The client is %s\n", client->name);
00631    /* find corresponding call */
00632    for (tmp = client->p; tmp; tmp = tmp->next) {
00633       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
00634          break;
00635    }
00636 
00637    from = iks_find_attrib(pak->x, "to");
00638    if(!from)
00639       from = client->connection->jid->full;
00640 
00641    if (!tmp)
00642       ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
00643 
00644    /* answer 'iq' packet to let the remote peer know that we're alive */
00645    gtalk_response(client, from, pak, NULL, NULL);
00646    return 1;
00647 }
00648 
00649 static int gtalk_handle_dtmf(struct gtalk *client, ikspak *pak)
00650 {
00651    struct gtalk_pvt *tmp;
00652    iks *dtmfnode = NULL, *dtmfchild = NULL;
00653    char *dtmf;
00654    char *from;
00655    /* Make sure our new call doesn't exist yet */
00656    for (tmp = client->p; tmp; tmp = tmp->next) {
00657       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) || iks_find_with_attrib(pak->x, "gtalk", "sid", tmp->sid))
00658          break;
00659    }
00660    from = iks_find_attrib(pak->x, "to");
00661    if(!from)
00662       from = client->connection->jid->full;
00663 
00664 
00665    if (tmp) {
00666       if(iks_find_with_attrib(pak->x, "dtmf-method", "method", "rtp")) {
00667          gtalk_response(client, from, pak,
00668                "feature-not-implemented xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'",
00669                "unsupported-dtmf-method xmlns='http://jabber.org/protocol/gtalk/info/dtmf#errors'");
00670          return -1;
00671       }
00672       if ((dtmfnode = iks_find(pak->x, "dtmf"))) {
00673          if((dtmf = iks_find_attrib(dtmfnode, "code"))) {
00674             if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-up")) {
00675                struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
00676                f.subclass = dtmf[0];
00677                ast_queue_frame(tmp->owner, &f);
00678                ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
00679             } else if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-down")) {
00680                struct ast_frame f = {AST_FRAME_DTMF_END, };
00681                f.subclass = dtmf[0];
00682                ast_queue_frame(tmp->owner, &f);
00683                ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
00684             } else if(iks_find_attrib(pak->x, "dtmf")) { /* 250 millasecond default */
00685                struct ast_frame f = {AST_FRAME_DTMF, };
00686                f.subclass = dtmf[0];
00687                ast_queue_frame(tmp->owner, &f);
00688                ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
00689             }
00690          }
00691       } else if ((dtmfnode = iks_find_with_attrib(pak->x, "gtalk", "action", "session-info"))) {
00692          if((dtmfchild = iks_find(dtmfnode, "dtmf"))) {
00693             if((dtmf = iks_find_attrib(dtmfchild, "code"))) {
00694                if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-up")) {
00695                   struct ast_frame f = {AST_FRAME_DTMF_END, };
00696                   f.subclass = dtmf[0];
00697                   ast_queue_frame(tmp->owner, &f);
00698                   ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
00699                } else if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-down")) {
00700                   struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
00701                   f.subclass = dtmf[0];
00702                   ast_queue_frame(tmp->owner, &f);
00703                   ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
00704                }
00705             }
00706          }
00707       }
00708       gtalk_response(client, from, pak, NULL, NULL);
00709       return 1;
00710    } else
00711       ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
00712 
00713    gtalk_response(client, from, pak, NULL, NULL);
00714    return 1;
00715 }
00716 
00717 static int gtalk_hangup_farend(struct gtalk *client, ikspak *pak)
00718 {
00719    struct gtalk_pvt *tmp;
00720    char *from;
00721 
00722    ast_log(LOG_DEBUG, "The client is %s\n", client->name);
00723    /* Make sure our new call doesn't exist yet */
00724    for (tmp = client->p; tmp; tmp = tmp->next) {
00725       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
00726          break;
00727    }
00728    from = iks_find_attrib(pak->x, "to");
00729    if(!from)
00730       from = client->connection->jid->full;
00731 
00732    if (tmp) {
00733       tmp->alreadygone = 1;
00734       if (tmp->owner)
00735          ast_queue_hangup(tmp->owner);
00736    } else
00737       ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
00738    gtalk_response(client, from, pak, NULL, NULL);
00739    return 1;
00740 }
00741 
00742 static int gtalk_create_candidates(struct gtalk *client, struct gtalk_pvt *p, char *sid, char *from, char *to)
00743 {
00744    struct gtalk_candidate *tmp;
00745    struct aji_client *c = client->connection;
00746    struct gtalk_candidate *ours1 = NULL, *ours2 = NULL;
00747    struct sockaddr_in sin;
00748    struct sockaddr_in dest;
00749    struct in_addr us;
00750    iks *iq, *gtalk, *candidate, *transport;
00751    char user[17], pass[17], preference[5], port[7];
00752 
00753 
00754    iq = iks_new("iq");
00755    gtalk = iks_new("session");
00756    candidate = iks_new("candidate");
00757    transport = iks_new("transport");
00758    if (!iq || !gtalk || !candidate || !transport) {
00759       ast_log(LOG_ERROR, "Memory allocation error\n");
00760       goto safeout;
00761    }
00762    ours1 = ast_calloc(1, sizeof(*ours1));
00763    ours2 = ast_calloc(1, sizeof(*ours2));
00764    if (!ours1 || !ours2)
00765       goto safeout;
00766 
00767    iks_insert_attrib(transport, "xmlns","http://www.google.com/transport/p2p");
00768    iks_insert_node(iq, gtalk);
00769    iks_insert_node(gtalk,transport);
00770    iks_insert_node(transport, candidate);
00771 
00772    for (; p; p = p->next) {
00773       if (!strcasecmp(p->sid, sid))
00774          break;
00775    }
00776 
00777    if (!p) {
00778       ast_log(LOG_NOTICE, "No matching gtalk session - SID %s!\n", sid);
00779       goto safeout;
00780    }
00781 
00782    ast_rtp_get_us(p->rtp, &sin);
00783    ast_find_ourip(&us, bindaddr);
00784 
00785    /* Setup our gtalk candidates */
00786    ast_copy_string(ours1->name, "rtp", sizeof(ours1->name));
00787    ours1->port = ntohs(sin.sin_port);
00788    ours1->preference = 1;
00789    snprintf(user, sizeof(user), "%08lx%08lx", ast_random(), ast_random());
00790    snprintf(pass, sizeof(pass), "%08lx%08lx", ast_random(), ast_random());
00791    ast_copy_string(ours1->username, user, sizeof(ours1->username));
00792    ast_copy_string(ours1->password, pass, sizeof(ours1->password));
00793    ast_copy_string(ours1->ip, ast_inet_ntoa(us), sizeof(ours1->ip));
00794    ours1->protocol = AJI_PROTOCOL_UDP;
00795    ours1->type = AJI_CONNECT_LOCAL;
00796    ours1->generation = 0;
00797    p->ourcandidates = ours1;
00798 
00799    if (!ast_strlen_zero(externip)) {
00800       /* XXX We should really stun for this one not just go with externip XXX */
00801       snprintf(user, sizeof(user), "%08lx%08lx", ast_random(), ast_random());
00802       snprintf(pass, sizeof(pass), "%08lx%08lx", ast_random(), ast_random());
00803       ast_copy_string(ours2->username, user, sizeof(ours2->username));
00804       ast_copy_string(ours2->password, pass, sizeof(ours2->password));
00805       ast_copy_string(ours2->ip, externip, sizeof(ours2->ip));
00806       ast_copy_string(ours2->name, "rtp", sizeof(ours1->name));
00807       ours2->port = ntohs(sin.sin_port);
00808       ours2->preference = 0.9;
00809       ours2->protocol = AJI_PROTOCOL_UDP;
00810       ours2->type = AJI_CONNECT_STUN;
00811       ours2->generation = 0;
00812       ours1->next = ours2;
00813       ours2 = NULL;
00814    }
00815    ours1 = NULL;
00816    dest.sin_addr = __ourip;
00817    dest.sin_port = sin.sin_port;
00818 
00819 
00820    for (tmp = p->ourcandidates; tmp; tmp = tmp->next) {
00821       snprintf(port, sizeof(port), "%d", tmp->port);
00822       snprintf(preference, sizeof(preference), "%.2f", tmp->preference);
00823       iks_insert_attrib(iq, "from", to);
00824       iks_insert_attrib(iq, "to", from);
00825       iks_insert_attrib(iq, "type", "set");
00826       iks_insert_attrib(iq, "id", c->mid);
00827       ast_aji_increment_mid(c->mid);
00828       iks_insert_attrib(gtalk, "type", "transport-info");
00829       iks_insert_attrib(gtalk, "id", sid);
00830       iks_insert_attrib(gtalk, "initiator", (p->initiator) ? to : from);
00831       iks_insert_attrib(gtalk, "xmlns", GOOGLE_NS);
00832       iks_insert_attrib(candidate, "name", tmp->name);
00833       iks_insert_attrib(candidate, "address", tmp->ip);
00834       iks_insert_attrib(candidate, "port", port);
00835       iks_insert_attrib(candidate, "username", tmp->username);
00836       iks_insert_attrib(candidate, "password", tmp->password);
00837       iks_insert_attrib(candidate, "preference", preference);
00838       if (tmp->protocol == AJI_PROTOCOL_UDP)
00839          iks_insert_attrib(candidate, "protocol", "udp");
00840       if (tmp->protocol == AJI_PROTOCOL_SSLTCP)
00841          iks_insert_attrib(candidate, "protocol", "ssltcp");
00842       if (tmp->type == AJI_CONNECT_STUN)
00843          iks_insert_attrib(candidate, "type", "stun");
00844       if (tmp->type == AJI_CONNECT_LOCAL)
00845          iks_insert_attrib(candidate, "type", "local");
00846       if (tmp->type == AJI_CONNECT_RELAY)
00847          iks_insert_attrib(candidate, "type", "relay");
00848       iks_insert_attrib(candidate, "network", "0");
00849       iks_insert_attrib(candidate, "generation", "0");
00850       iks_send(c->p, iq);
00851    }
00852    p->laststun = 0;
00853 
00854 safeout:
00855    if (ours1)
00856       free(ours1);
00857    if (ours2)
00858       free(ours2);
00859    if (iq)
00860       iks_delete(iq);
00861    if (gtalk)
00862       iks_delete(gtalk);
00863    if (candidate)
00864       iks_delete(candidate);
00865    if(transport)
00866       iks_delete(transport);
00867    return 1;
00868 }
00869 
00870 static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid)
00871 {
00872    struct gtalk_pvt *tmp = NULL;
00873    struct aji_resource *resources = NULL;
00874    struct aji_buddy *buddy;
00875    char idroster[200];
00876    char *data, *exten = NULL;
00877 
00878    if (option_debug)
00879       ast_log(LOG_DEBUG, "The client is %s for alloc\n", client->name);
00880    if (!sid && !strchr(them, '/')) {   /* I started call! */
00881       if (!strcasecmp(client->name, "guest")) {
00882          buddy = ASTOBJ_CONTAINER_FIND(&client->connection->buddies, them);
00883          if (buddy)
00884             resources = buddy->resources;
00885       } else if (client->buddy)
00886          resources = client->buddy->resources;
00887       while (resources) {
00888          if (resources->cap->jingle) {
00889             break;
00890          }
00891          resources = resources->next;
00892       }
00893       if (resources)
00894          snprintf(idroster, sizeof(idroster), "%s/%s", them, resources->resource);
00895       else {
00896          ast_log(LOG_ERROR, "no gtalk capable clients to talk to.\n");
00897          return NULL;
00898       }
00899    }
00900    if (!(tmp = ast_calloc(1, sizeof(*tmp)))) {
00901       return NULL;
00902    }
00903    if (sid) {
00904       ast_copy_string(tmp->sid, sid, sizeof(tmp->sid));
00905       ast_copy_string(tmp->them, them, sizeof(tmp->them));
00906       ast_copy_string(tmp->us, us, sizeof(tmp->us));
00907    } else {
00908       snprintf(tmp->sid, sizeof(tmp->sid), "%08lx%08lx", ast_random(), ast_random());
00909       ast_copy_string(tmp->them, idroster, sizeof(tmp->them));
00910       ast_copy_string(tmp->us, us, sizeof(tmp->us));
00911       tmp->initiator = 1;
00912    }
00913    tmp->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, bindaddr.sin_addr);
00914    tmp->parent = client;
00915    if (!tmp->rtp) {
00916       ast_log(LOG_WARNING, "Out of RTP sessions?\n");
00917       free(tmp);
00918       return NULL;
00919    }
00920 
00921    /* Set CALLERID(name) to the full JID of the remote peer */
00922    ast_copy_string(tmp->cid_name, tmp->them, sizeof(tmp->cid_name));
00923 
00924    if(strchr(tmp->us, '/')) {
00925       data = ast_strdupa(tmp->us);
00926       exten = strsep(&data, "/");
00927    } else
00928       exten = tmp->us;
00929    ast_copy_string(tmp->exten,  exten, sizeof(tmp->exten));
00930    ast_mutex_init(&tmp->lock);
00931    ast_mutex_lock(&gtalklock);
00932    tmp->next = client->p;
00933    client->p = tmp;
00934    ast_mutex_unlock(&gtalklock);
00935    return tmp;
00936 }
00937 
00938 /*! \brief Start new gtalk channel */
00939 static struct ast_channel *gtalk_new(struct gtalk *client, struct gtalk_pvt *i, int state, const char *title)
00940 {
00941    struct ast_channel *tmp;
00942    int fmt;
00943    int what;
00944    const char *n2;
00945 
00946    if (title)
00947       n2 = title;
00948    else
00949       n2 = i->us;
00950    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);
00951    if (!tmp) {
00952       ast_log(LOG_WARNING, "Unable to allocate Gtalk channel structure!\n");
00953       return NULL;
00954    }
00955    tmp->tech = &gtalk_tech;
00956 
00957    /* Select our native format based on codec preference until we receive
00958       something from another device to the contrary. */
00959 /* ast_verbose("XXXXXXXXXXXXX\nXXX i->jointcapability = %X\nXXX i->capability = %X\nXXX global_capability %X\n XXXXXXXXXXXX\n",i->jointcapability,i->capability,global_capability); */
00960    if (i->jointcapability)
00961       what = i->jointcapability;
00962    else if (i->capability)
00963       what = i->capability;
00964    else
00965       what = global_capability;
00966    tmp->nativeformats = ast_codec_choose(&i->prefs, what, 1) | (i->jointcapability & AST_FORMAT_VIDEO_MASK);
00967    fmt = ast_best_codec(tmp->nativeformats);
00968 
00969    if (i->rtp) {
00970       ast_rtp_setstun(i->rtp, 1);
00971       tmp->fds[0] = ast_rtp_fd(i->rtp);
00972       tmp->fds[1] = ast_rtcp_fd(i->rtp);
00973    }
00974    if (i->vrtp) {
00975       ast_rtp_setstun(i->rtp, 1);
00976       tmp->fds[2] = ast_rtp_fd(i->vrtp);
00977       tmp->fds[3] = ast_rtcp_fd(i->vrtp);
00978    }
00979    if (state == AST_STATE_RING)
00980       tmp->rings = 1;
00981    tmp->adsicpe = AST_ADSI_UNAVAILABLE;
00982    tmp->writeformat = fmt;
00983    tmp->rawwriteformat = fmt;
00984    tmp->readformat = fmt;
00985    tmp->rawreadformat = fmt;
00986    tmp->tech_pvt = i;
00987 
00988    tmp->callgroup = client->callgroup;
00989    tmp->pickupgroup = client->pickupgroup;
00990    tmp->cid.cid_pres = client->callingpres;
00991    if (!ast_strlen_zero(client->accountcode))
00992       ast_string_field_set(tmp, accountcode, client->accountcode);
00993    if (client->amaflags)
00994       tmp->amaflags = client->amaflags;
00995    if (!ast_strlen_zero(client->language))
00996       ast_string_field_set(tmp, language, client->language);
00997    if (!ast_strlen_zero(client->musicclass))
00998       ast_string_field_set(tmp, musicclass, client->musicclass);
00999    i->owner = tmp;
01000    ast_module_ref(ast_module_info->self);
01001    ast_copy_string(tmp->context, client->context, sizeof(tmp->context));
01002    ast_copy_string(tmp->exten, i->exten, sizeof(tmp->exten));
01003 
01004    if (!ast_strlen_zero(i->exten) && strcmp(i->exten, "s"))
01005       tmp->cid.cid_dnid = ast_strdup(i->exten);
01006    tmp->priority = 1;
01007    if (i->rtp)
01008       ast_jb_configure(tmp, &global_jbconf);
01009    if (state != AST_STATE_DOWN && ast_pbx_start(tmp)) {
01010       ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
01011       tmp->hangupcause = AST_CAUSE_SWITCH_CONGESTION;
01012       ast_hangup(tmp);
01013       tmp = NULL;
01014    }
01015 
01016    return tmp;
01017 }
01018 
01019 static int gtalk_action(struct gtalk *client, struct gtalk_pvt *p, const char *action)
01020 {
01021    iks *request, *session = NULL;
01022    int res = -1;
01023 
01024    request = iks_new("iq");
01025    if (request) {
01026       iks_insert_attrib(request, "type", "set");
01027       iks_insert_attrib(request, "from", p->us);
01028       iks_insert_attrib(request, "to", p->them);
01029       iks_insert_attrib(request, "id", client->connection->mid);
01030       ast_aji_increment_mid(client->connection->mid);
01031       session = iks_new("session");
01032       if (session) {
01033          iks_insert_attrib(session, "type", action);
01034          iks_insert_attrib(session, "id", p->sid);
01035          iks_insert_attrib(session, "initiator", p->initiator ? p->us : p->them);
01036          iks_insert_attrib(session, "xmlns", "http://www.google.com/session");
01037          iks_insert_node(request, session);
01038          iks_send(client->connection->p, request);
01039          iks_delete(session);
01040          res = 0;
01041       }
01042       iks_delete(request);
01043    }
01044    return res;
01045 }
01046 
01047 static void gtalk_free_candidates(struct gtalk_candidate *candidate)
01048 {
01049    struct gtalk_candidate *last;
01050    while (candidate) {
01051       last = candidate;
01052       candidate = candidate->next;
01053       free(last);
01054    }
01055 }
01056 
01057 static void gtalk_free_pvt(struct gtalk *client, struct gtalk_pvt *p)
01058 {
01059    struct gtalk_pvt *cur, *prev = NULL;
01060    cur = client->p;
01061    while (cur) {
01062       if (cur == p) {
01063          if (prev)
01064             prev->next = p->next;
01065          else
01066             client->p = p->next;
01067          break;
01068       }
01069       prev = cur;
01070       cur = cur->next;
01071    }
01072    if (p->ringrule)
01073       iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
01074    if (p->owner)
01075       ast_log(LOG_WARNING, "Uh oh, there's an owner, this is going to be messy.\n");
01076    if (p->rtp)
01077       ast_rtp_destroy(p->rtp);
01078    if (p->vrtp)
01079       ast_rtp_destroy(p->vrtp);
01080    gtalk_free_candidates(p->theircandidates);
01081    free(p);
01082 }
01083 
01084 
01085 static int gtalk_newcall(struct gtalk *client, ikspak *pak)
01086 {
01087    struct gtalk_pvt *p, *tmp = client->p;
01088    struct ast_channel *chan;
01089    int res;
01090    iks *codec;
01091    char *from = NULL;
01092    /* Make sure our new call doesn't exist yet */
01093    from = iks_find_attrib(pak->x,"to");
01094    if(!from)
01095       from = client->connection->jid->full;
01096    
01097    while (tmp) {
01098       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
01099          ast_log(LOG_NOTICE, "Ignoring duplicate call setup on SID %s\n", tmp->sid);
01100          gtalk_response(client, from, pak, "out-of-order", NULL);
01101          return -1;
01102       }
01103       tmp = tmp->next;
01104    }
01105 
01106    p = gtalk_alloc(client, from, pak->from->full, iks_find_attrib(pak->query, "id"));
01107    if (!p) {
01108       ast_log(LOG_WARNING, "Unable to allocate gtalk structure!\n");
01109       return -1;
01110    }
01111    chan = gtalk_new(client, p, AST_STATE_DOWN, pak->from->user);
01112    if (chan) {
01113       ast_mutex_lock(&p->lock);
01114       ast_copy_string(p->them, pak->from->full, sizeof(p->them));
01115       if (iks_find_attrib(pak->query, "id")) {
01116          ast_copy_string(p->sid, iks_find_attrib(pak->query, "id"),
01117                      sizeof(p->sid));
01118       }
01119 
01120       codec = iks_child(iks_child(iks_child(pak->x)));
01121       while (codec) {
01122          ast_rtp_set_m_type(p->rtp, atoi(iks_find_attrib(codec, "id")));
01123          ast_rtp_set_rtpmap_type(p->rtp, atoi(iks_find_attrib(codec, "id")), "audio",
01124                   iks_find_attrib(codec, "name"), 0);
01125          codec = iks_next(codec);
01126       }
01127       
01128       ast_mutex_unlock(&p->lock);
01129       ast_setstate(chan, AST_STATE_RING);
01130       res = ast_pbx_start(chan);
01131 
01132       switch (res) {
01133       case AST_PBX_FAILED:
01134          ast_log(LOG_WARNING, "Failed to start PBX :(\n");
01135          gtalk_response(client, from, pak, "service-unavailable", NULL);
01136          break;
01137       case AST_PBX_CALL_LIMIT:
01138          ast_log(LOG_WARNING, "Failed to start PBX (call limit reached) \n");
01139          gtalk_response(client, from, pak, "service-unavailable", NULL);
01140          break;
01141       case AST_PBX_SUCCESS:
01142          gtalk_response(client, from, pak, NULL, NULL);
01143          gtalk_invite_response(p, p->them, p->us,p->sid, 0);
01144          gtalk_create_candidates(client, p, p->sid, p->them, p->us);
01145          /* nothing to do */
01146          break;
01147       }
01148    } else {
01149       gtalk_free_pvt(client, p);
01150    }
01151    return 1;
01152 }
01153 
01154 static int gtalk_update_stun(struct gtalk *client, struct gtalk_pvt *p)
01155 {
01156    struct gtalk_candidate *tmp;
01157    struct hostent *hp;
01158    struct ast_hostent ahp;
01159    struct sockaddr_in sin;
01160    struct sockaddr_in aux;
01161 
01162    if (time(NULL) == p->laststun)
01163       return 0;
01164 
01165    tmp = p->theircandidates;
01166    p->laststun = time(NULL);
01167    while (tmp) {
01168       char username[256];
01169 
01170       /* Find the IP address of the host */
01171       hp = ast_gethostbyname(tmp->ip, &ahp);
01172       sin.sin_family = AF_INET;
01173       memcpy(&sin.sin_addr, hp->h_addr, sizeof(sin.sin_addr));
01174       sin.sin_port = htons(tmp->port);
01175       snprintf(username, sizeof(username), "%s%s", tmp->username,
01176           p->ourcandidates->username);
01177       
01178       /* Find out the result of the STUN */
01179       ast_rtp_get_peer(p->rtp, &aux);
01180 
01181       /* If the STUN result is different from the IP of the hostname,
01182          lock on the stun IP of the hostname advertised by the
01183          remote client */
01184       if (aux.sin_addr.s_addr && 
01185           aux.sin_addr.s_addr != sin.sin_addr.s_addr)
01186          ast_rtp_stun_request(p->rtp, &aux, username);
01187       else 
01188          ast_rtp_stun_request(p->rtp, &sin, username);
01189       
01190       if (aux.sin_addr.s_addr && option_debug > 3) {
01191          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);
01192          ast_log(LOG_DEBUG, "Sending STUN request to %s\n", tmp->ip);
01193       }
01194 
01195       tmp = tmp->next;
01196    }
01197    return 1;
01198 }
01199 
01200 static int gtalk_add_candidate(struct gtalk *client, ikspak *pak)
01201 {
01202    struct gtalk_pvt *p = NULL, *tmp = NULL;
01203    struct aji_client *c = client->connection;
01204    struct gtalk_candidate *newcandidate = NULL;
01205    iks *traversenodes = NULL, *receipt = NULL;
01206    char *from;
01207 
01208    from = iks_find_attrib(pak->x,"to");
01209    if(!from)
01210       from = c->jid->full;
01211 
01212    for (tmp = client->p; tmp; tmp = tmp->next) {
01213       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
01214          p = tmp;
01215          break;
01216       }
01217    }
01218 
01219    if (!p)
01220       return -1;
01221 
01222    traversenodes = pak->query;
01223    while(traversenodes) {
01224       if(!strcasecmp(iks_name(traversenodes), "session")) {
01225          traversenodes = iks_child(traversenodes);
01226          continue;
01227       }
01228       if(!strcasecmp(iks_name(traversenodes), "transport")) {
01229          traversenodes = iks_child(traversenodes);
01230          continue;
01231       }
01232       if(!strcasecmp(iks_name(traversenodes), "candidate")) {
01233          newcandidate = ast_calloc(1, sizeof(*newcandidate));
01234          if (!newcandidate)
01235             return 0;
01236          ast_copy_string(newcandidate->name, iks_find_attrib(traversenodes, "name"),
01237                      sizeof(newcandidate->name));
01238          ast_copy_string(newcandidate->ip, iks_find_attrib(traversenodes, "address"),
01239                      sizeof(newcandidate->ip));
01240          newcandidate->port = atoi(iks_find_attrib(traversenodes, "port"));
01241          ast_copy_string(newcandidate->username, iks_find_attrib(traversenodes, "username"),
01242                      sizeof(newcandidate->username));
01243          ast_copy_string(newcandidate->password, iks_find_attrib(traversenodes, "password"),
01244                      sizeof(newcandidate->password));
01245          newcandidate->preference = atof(iks_find_attrib(traversenodes, "preference"));
01246          if (!strcasecmp(iks_find_attrib(traversenodes, "protocol"), "udp"))
01247             newcandidate->protocol = AJI_PROTOCOL_UDP;
01248          if (!strcasecmp(iks_find_attrib(traversenodes, "protocol"), "ssltcp"))
01249             newcandidate->protocol = AJI_PROTOCOL_SSLTCP;
01250       
01251          if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "stun"))
01252             newcandidate->type = AJI_CONNECT_STUN;
01253          if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "local"))
01254             newcandidate->type = AJI_CONNECT_LOCAL;
01255          if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "relay"))
01256             newcandidate->type = AJI_CONNECT_RELAY;
01257          ast_copy_string(newcandidate->network, iks_find_attrib(traversenodes, "network"),
01258                      sizeof(newcandidate->network));
01259          newcandidate->generation = atoi(iks_find_attrib(traversenodes, "generation"));
01260          newcandidate->next = NULL;
01261       
01262          newcandidate->next = p->theircandidates;
01263          p->theircandidates = newcandidate;
01264          p->laststun = 0;
01265          gtalk_update_stun(p->parent, p);
01266          newcandidate = NULL;
01267       }
01268       traversenodes = iks_next(traversenodes);
01269    }
01270    
01271    receipt = iks_new("iq");
01272    iks_insert_attrib(receipt, "type", "result");
01273    iks_insert_attrib(receipt, "from", from);
01274    iks_insert_attrib(receipt, "to", iks_find_attrib(pak->x, "from"));
01275    iks_insert_attrib(receipt, "id", iks_find_attrib(pak->x, "id"));
01276    iks_send(c->p, receipt);
01277    iks_delete(receipt);
01278 
01279    return 1;
01280 }
01281 
01282 static struct ast_frame *gtalk_rtp_read(struct ast_channel *ast, struct gtalk_pvt *p)
01283 {
01284    struct ast_frame *f;
01285 
01286    if (!p->rtp)
01287       return &ast_null_frame;
01288    f = ast_rtp_read(p->rtp);
01289    gtalk_update_stun(p->parent, p);
01290    if (p->owner) {
01291       /* We already hold the channel lock */
01292       if (f->frametype == AST_FRAME_VOICE) {
01293          if (f->subclass != (p->owner->nativeformats & AST_FORMAT_AUDIO_MASK)) {
01294             if (option_debug)
01295                ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
01296             p->owner->nativeformats =
01297                (p->owner->nativeformats & AST_FORMAT_VIDEO_MASK) | f->subclass;
01298             ast_set_read_format(p->owner, p->owner->readformat);
01299             ast_set_write_format(p->owner, p->owner->writeformat);
01300          }
01301 /*       if ((ast_test_flag(p, SIP_DTMF) == SIP_DTMF_INBAND) && p->vad) {
01302             f = ast_dsp_process(p->owner, p->vad, f);
01303             if (option_debug && f && (f->frametype == AST_FRAME_DTMF))
01304                ast_log(LOG_DEBUG, "* Detected inband DTMF '%c'\n", f->subclass);
01305               } */
01306       }
01307    }
01308    return f;
01309 }
01310 
01311 static struct ast_frame *gtalk_read(struct ast_channel *ast)
01312 {
01313    struct ast_frame *fr;
01314    struct gtalk_pvt *p = ast->tech_pvt;
01315 
01316    ast_mutex_lock(&p->lock);
01317    fr = gtalk_rtp_read(ast, p);
01318    ast_mutex_unlock(&p->lock);
01319    return fr;
01320 }
01321 
01322 /*! \brief Send frame to media channel (rtp) */
01323 static int gtalk_write(struct ast_channel *ast, struct ast_frame *frame)
01324 {
01325    struct gtalk_pvt *p = ast->tech_pvt;
01326    int res = 0;
01327 
01328    switch (frame->frametype) {
01329    case AST_FRAME_VOICE:
01330       if (!(frame->subclass & ast->nativeformats)) {
01331          ast_log(LOG_WARNING,
01332                "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
01333                frame->subclass, ast->nativeformats, ast->readformat,
01334                ast->writeformat);
01335          return 0;
01336       }
01337       if (p) {
01338          ast_mutex_lock(&p->lock);
01339          if (p->rtp) {
01340             res = ast_rtp_write(p->rtp, frame);
01341          }
01342          ast_mutex_unlock(&p->lock);
01343       }
01344       break;
01345    case AST_FRAME_VIDEO:
01346       if (p) {
01347          ast_mutex_lock(&p->lock);
01348          if (p->vrtp) {
01349             res = ast_rtp_write(p->vrtp, frame);
01350          }
01351          ast_mutex_unlock(&p->lock);
01352       }
01353       break;
01354    case AST_FRAME_IMAGE:
01355       return 0;
01356       break;
01357    default:
01358       ast_log(LOG_WARNING, "Can't send %d type frames with Gtalk write\n",
01359             frame->frametype);
01360       return 0;
01361    }
01362 
01363    return res;
01364 }
01365 
01366 static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
01367 {
01368    struct gtalk_pvt *p = newchan->tech_pvt;
01369    ast_mutex_lock(&p->lock);
01370 
01371    if ((p->owner != oldchan)) {
01372       ast_mutex_unlock(&p->lock);
01373       return -1;
01374    }
01375    if (p->owner == oldchan)
01376       p->owner = newchan;
01377    ast_mutex_unlock(&p->lock);
01378    return 0;
01379 }
01380 
01381 static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen)
01382 {
01383    int res = 0;
01384 
01385    switch (condition) {
01386    case AST_CONTROL_HOLD:
01387       ast_moh_start(ast, data, NULL);
01388       break;
01389    case AST_CONTROL_UNHOLD:
01390       ast_moh_stop(ast);
01391       break;
01392    default:
01393       ast_log(LOG_NOTICE, "Don't know how to indicate condition '%d'\n", condition);
01394       res = -1;
01395    }
01396 
01397    return res;
01398 }
01399 
01400 static int gtalk_digit_begin(struct ast_channel *chan, char digit)
01401 {
01402    return gtalk_digit(chan, digit, 0);
01403 }
01404 
01405 static int gtalk_digit_end(struct ast_channel *chan, char digit, unsigned int duration)
01406 {
01407    return gtalk_digit(chan, digit, duration);
01408 }
01409 
01410 static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration)
01411 {
01412    struct gtalk_pvt *p = ast->tech_pvt;
01413    struct gtalk *client = p->parent;
01414    iks *iq, *gtalk, *dtmf;
01415    char buffer[2] = {digit, '\0'};
01416    iq = iks_new("iq");
01417    gtalk = iks_new("gtalk");
01418    dtmf = iks_new("dtmf");
01419    if(!iq || !gtalk || !dtmf) {
01420       if(iq)
01421          iks_delete(iq);
01422       if(gtalk)
01423          iks_delete(gtalk);
01424       if(dtmf)
01425          iks_delete(dtmf);
01426       ast_log(LOG_ERROR, "Did not send dtmf do to memory issue\n");
01427       return -1;
01428    }
01429 
01430    iks_insert_attrib(iq, "type", "set");
01431    iks_insert_attrib(iq, "to", p->them);
01432    iks_insert_attrib(iq, "from", p->us);
01433    iks_insert_attrib(iq, "id", client->connection->mid);
01434    ast_aji_increment_mid(client->connection->mid);
01435    iks_insert_attrib(gtalk, "xmlns", "http://jabber.org/protocol/gtalk");
01436    iks_insert_attrib(gtalk, "action", "session-info");
01437    iks_insert_attrib(gtalk, "initiator", p->initiator ? p->us: p->them);
01438    iks_insert_attrib(gtalk, "sid", p->sid);
01439    iks_insert_attrib(dtmf, "xmlns", "http://jabber.org/protocol/gtalk/info/dtmf");
01440    iks_insert_attrib(dtmf, "code", buffer);
01441    iks_insert_node(iq, gtalk);
01442    iks_insert_node(gtalk, dtmf);
01443 
01444    ast_mutex_lock(&p->lock);
01445    if (ast->dtmff.frametype == AST_FRAME_DTMF_BEGIN || duration == 0) {
01446       iks_insert_attrib(dtmf, "action", "button-down");
01447    } else if (ast->dtmff.frametype == AST_FRAME_DTMF_END || duration != 0) {
01448       iks_insert_attrib(dtmf, "action", "button-up");
01449    }
01450    iks_send(client->connection->p, iq);
01451    iks_delete(iq);
01452    iks_delete(gtalk);
01453    iks_delete(dtmf);
01454    ast_mutex_unlock(&p->lock);
01455    return 0;
01456 }
01457 
01458 static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen)
01459 {
01460    ast_log(LOG_NOTICE, "XXX Implement gtalk sendhtml XXX\n");
01461 
01462    return -1;
01463 }
01464 
01465 /* Not in use right now.
01466 static int gtalk_auto_congest(void *nothing)
01467 {
01468    struct gtalk_pvt *p = nothing;
01469 
01470    ast_mutex_lock(&p->lock);
01471    if (p->owner) {
01472       if (!ast_channel_trylock(p->owner)) {
01473          ast_log(LOG_NOTICE, "Auto-congesting %s\n", p->owner->name);
01474          ast_queue_control(p->owner, AST_CONTROL_CONGESTION);
01475          ast_channel_unlock(p->owner);
01476       }
01477    }
01478    ast_mutex_unlock(&p->lock);
01479    return 0;
01480 }
01481 */
01482 
01483 /*! \brief Initiate new call, part of PBX interface 
01484  *    dest is the dial string */
01485 static int gtalk_call(struct ast_channel *ast, char *dest, int timeout)
01486 {
01487    struct gtalk_pvt *p = ast->tech_pvt;
01488 
01489    if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
01490       ast_log(LOG_WARNING, "gtalk_call called on %s, neither down nor reserved\n", ast->name);
01491       return -1;
01492    }
01493 
01494    ast_setstate(ast, AST_STATE_RING);
01495    p->jointcapability = p->capability;
01496    if (!p->ringrule) {
01497       ast_copy_string(p->ring, p->parent->connection->mid, sizeof(p->ring));
01498       p->ringrule = iks_filter_add_rule(p->parent->connection->f, gtalk_ringing_ack, p,
01499                      IKS_RULE_ID, p->ring, IKS_RULE_DONE);
01500    } else
01501       ast_log(LOG_WARNING, "Whoa, already have a ring rule!\n");
01502 
01503    gtalk_invite(p, p->them, p->us, p->sid, 1);
01504    gtalk_create_candidates(p->parent, p, p->sid, p->them, p->us);
01505 
01506    return 0;
01507 }
01508 
01509 /*! \brief Hangup a call through the gtalk proxy channel */
01510 static int gtalk_hangup(struct ast_channel *ast)
01511 {
01512    struct gtalk_pvt *p = ast->tech_pvt;
01513    struct gtalk *client;
01514 
01515    ast_mutex_lock(&p->lock);
01516    client = p->parent;
01517    p->owner = NULL;
01518    ast->tech_pvt = NULL;
01519    if (!p->alreadygone)
01520       gtalk_action(client, p, "terminate");
01521    ast_mutex_unlock(&p->lock);
01522 
01523    gtalk_free_pvt(client, p);
01524    ast_module_unref(ast_module_info->self);
01525 
01526    return 0;
01527 }
01528 
01529 /*! \brief Part of PBX interface */
01530 static struct ast_channel *gtalk_request(const char *type, int format, void *data, int *cause)
01531 {
01532    struct gtalk_pvt *p = NULL;
01533    struct gtalk *client = NULL;
01534    char *sender = NULL, *to = NULL, *s = NULL;
01535    struct ast_channel *chan = NULL;
01536 
01537    if (data) {
01538       s = ast_strdupa(data);
01539       if (s) {
01540          sender = strsep(&s, "/");
01541          if (sender && (sender[0] != '\0'))
01542             to = strsep(&s, "/");
01543          if (!to) {
01544             ast_log(LOG_ERROR, "Bad arguments in Gtalk Dialstring: %s\n", (char*) data);
01545             return NULL;
01546          }
01547       }
01548    }
01549    client = find_gtalk(to, sender);
01550    if (!client) {
01551       ast_log(LOG_WARNING, "Could not find recipient.\n");
01552       return NULL;
01553    }
01554    ASTOBJ_WRLOCK(client);
01555    p = gtalk_alloc(client, strchr(sender, '@') ? sender : client->connection->jid->full, strchr(to, '@') ? to : client->user, NULL);
01556    if (p)
01557       chan = gtalk_new(client, p, AST_STATE_DOWN, to);
01558 
01559    ASTOBJ_UNLOCK(client);
01560    return chan;
01561 }
01562 
01563 /*! \brief CLI command "gtalk show channels" */
01564 static int gtalk_show_channels(int fd, int argc, char **argv)
01565 {
01566 #define FORMAT  "%-30.30s  %-30.30s  %-15.15s  %-5.5s %-5.5s \n"
01567    struct gtalk_pvt *p;
01568    struct ast_channel *chan;
01569    int numchans = 0;
01570    char them[AJI_MAX_JIDLEN];
01571    char *jid = NULL;
01572    char *resource = NULL;
01573 
01574    if (argc != 3)
01575       return RESULT_SHOWUSAGE;
01576 
01577    ast_mutex_lock(&gtalklock);
01578    ast_cli(fd, FORMAT, "Channel", "Jabber ID", "Resource", "Read", "Write");
01579    ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
01580       ASTOBJ_WRLOCK(iterator);
01581       p = iterator->p;
01582       while(p) {
01583          chan = p->owner;
01584          ast_copy_string(them, p->them, sizeof(them));
01585          jid = them;
01586          resource = strchr(them, '/');
01587          if (!resource)
01588             resource = "None";
01589          else {
01590             *resource = '\0';
01591             resource ++;
01592          }
01593          if (chan)
01594             ast_cli(fd, FORMAT, 
01595                chan->name,
01596                jid,
01597                resource,
01598                ast_getformatname(chan->readformat),
01599                ast_getformatname(chan->writeformat)               
01600                );
01601          else 
01602             ast_log(LOG_WARNING, "No available channel\n");
01603          numchans ++;
01604          p = p->next;
01605       }
01606       ASTOBJ_UNLOCK(iterator);
01607    });
01608 
01609    ast_mutex_unlock(&gtalklock);
01610 
01611    ast_cli(fd, "%d active gtalk channel%s\n", numchans, (numchans != 1) ? "s" : "");
01612    return RESULT_SUCCESS;
01613 #undef FORMAT
01614 }
01615 
01616 /*! \brief CLI command "gtalk show channels" */
01617 static int gtalk_do_reload(int fd, int argc, char **argv)
01618 {
01619    ast_verbose("IT DOES WORK!\n");
01620    return RESULT_SUCCESS;
01621 }
01622 
01623 static int gtalk_parser(void *data, ikspak *pak)
01624 {
01625    struct gtalk *client = ASTOBJ_REF((struct gtalk *) data);
01626 
01627    if (iks_find_with_attrib(pak->x, "session", "type", "initiate")) {
01628       /* New call */
01629       gtalk_newcall(client, pak);
01630    } else if (iks_find_with_attrib(pak->x, "session", "type", "candidates") || iks_find_with_attrib(pak->x, "session", "type", "transport-info")) {
01631       if (option_debug > 2)
01632          ast_log(LOG_DEBUG, "About to add candidate!\n");
01633       gtalk_add_candidate(client, pak);
01634       if (option_debug > 2)
01635          ast_log(LOG_DEBUG, "Candidate Added!\n");
01636    } else if (iks_find_with_attrib(pak->x, "session", "type", "accept")) {
01637       gtalk_is_answered(client, pak);
01638    } else if (iks_find_with_attrib(pak->x, "session", "type", "transport-accept")) {
01639       gtalk_is_accepted(client, pak);
01640    } else if (iks_find_with_attrib(pak->x, "session", "type", "content-info") || iks_find_with_attrib(pak->x, "gtalk", "action", "session-info")) {
01641       gtalk_handle_dtmf(client, pak);
01642    } else if (iks_find_with_attrib(pak->x, "session", "type", "terminate")) {
01643       gtalk_hangup_farend(client, pak);
01644    } else if (iks_find_with_attrib(pak->x, "session", "type", "reject")) {
01645       gtalk_hangup_farend(client, pak);
01646    }
01647    ASTOBJ_UNREF(client, gtalk_member_destroy);
01648    return IKS_FILTER_EAT;
01649 }
01650 
01651 /* Not using this anymore probably take out soon 
01652 static struct gtalk_candidate *gtalk_create_candidate(char *args)
01653 {
01654    char *name, *type, *preference, *protocol;
01655    struct gtalk_candidate *res;
01656    res = malloc(sizeof(struct gtalk_candidate));
01657    memset(res, 0, sizeof(struct gtalk_candidate));
01658    if (args)
01659       name = args;
01660    if ((args = strchr(args, ','))) {
01661       *args = '\0';
01662       args++;
01663       preference = args;
01664    }
01665    if ((args = strchr(args, ','))) {
01666       *args = '\0';
01667       args++;
01668       protocol = args;
01669    }
01670    if ((args = strchr(args, ','))) {
01671       *args = '\0';
01672       args++;
01673       type = args;
01674    }
01675    if (name)
01676       ast_copy_string(res->name, name, sizeof(res->name));
01677    if (preference) {
01678       res->preference = atof(preference);
01679    }
01680    if (protocol) {
01681       if (!strcasecmp("udp", protocol))
01682          res->protocol = AJI_PROTOCOL_UDP;
01683       if (!strcasecmp("ssltcp", protocol))
01684          res->protocol = AJI_PROTOCOL_SSLTCP;
01685    }
01686    if (type) {
01687       if (!strcasecmp("stun", type))
01688          res->type = AJI_CONNECT_STUN;
01689       if (!strcasecmp("local", type))
01690          res->type = AJI_CONNECT_LOCAL;
01691       if (!strcasecmp("relay", type))
01692          res->type = AJI_CONNECT_RELAY;
01693    }
01694 
01695    return res;
01696 }
01697 */
01698 
01699 static int gtalk_create_member(char *label, struct ast_variable *var, int allowguest,
01700                         struct ast_codec_pref prefs, char *context,
01701                         struct gtalk *member)
01702 {
01703    struct aji_client *client;
01704 
01705    if (!member)
01706       ast_log(LOG_WARNING, "Out of memory.\n");
01707 
01708    ast_copy_string(member->name, label, sizeof(member->name));
01709    ast_copy_string(member->user, label, sizeof(member->user));
01710    ast_copy_string(member->context, context, sizeof(member->context));
01711    member->allowguest = allowguest;
01712    member->prefs = prefs;
01713    while (var) {
01714 #if 0
01715       struct gtalk_candidate *candidate = NULL;
01716 #endif
01717       if (!strcasecmp(var->name, "username"))
01718          ast_copy_string(member->user, var->value, sizeof(member->user));
01719       else if (!strcasecmp(var->name, "disallow"))
01720          ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 0);
01721       else if (!strcasecmp(var->name, "allow"))
01722          ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 1);
01723       else if (!strcasecmp(var->name, "context"))
01724          ast_copy_string(member->context, var->value, sizeof(member->context));
01725 #if 0
01726       else if (!strcasecmp(var->name, "candidate")) {
01727          candidate = gtalk_create_candidate(var->value);
01728          if (candidate) {
01729             candidate->next = member->ourcandidates;
01730             member->ourcandidates = candidate;
01731          }
01732       }
01733 #endif
01734       else if (!strcasecmp(var->name, "connection")) {
01735          if ((client = ast_aji_get_client(var->value))) {
01736             member->connection = client;
01737             iks_filter_add_rule(client->f, gtalk_parser, member, 
01738                       IKS_RULE_TYPE, IKS_PAK_IQ, 
01739                       IKS_RULE_FROM_PARTIAL, member->user,
01740                       IKS_RULE_NS, "http://www.google.com/session",
01741                       IKS_RULE_DONE);
01742 
01743          } else {
01744             ast_log(LOG_ERROR, "connection referenced not found!\n");
01745             return 0;
01746          }
01747       }
01748       var = var->next;
01749    }
01750    if (member->connection && member->user)
01751       member->buddy = ASTOBJ_CONTAINER_FIND(&member->connection->buddies, member->user);
01752    else {
01753       ast_log(LOG_ERROR, "No Connection or Username!\n");
01754    }
01755    return 1;
01756 }
01757 
01758 static int gtalk_load_config(void)
01759 {
01760    char *cat = NULL;
01761    struct ast_config *cfg = NULL;
01762    char context[AST_MAX_CONTEXT];
01763    int allowguest = 1;
01764    struct ast_variable *var;
01765    struct gtalk *member;
01766    struct ast_codec_pref prefs;
01767    struct aji_client_container *clients;
01768    struct gtalk_candidate *global_candidates = NULL;
01769    struct hostent *hp;
01770    struct ast_hostent ahp;
01771 
01772    cfg = ast_config_load(GOOGLE_CONFIG);
01773    if (!cfg)
01774       return 0;
01775 
01776    /* Copy the default jb config over global_jbconf */
01777    memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
01778 
01779    cat = ast_category_browse(cfg, NULL);
01780    for (var = ast_variable_browse(cfg, "general"); var; var = var->next) {
01781       /* handle jb conf */
01782       if (!ast_jb_read_conf(&global_jbconf, var->name, var->value))
01783          continue;
01784 
01785       if (!strcasecmp(var->name, "allowguest"))
01786          allowguest =
01787             (ast_true(ast_variable_retrieve(cfg, "general", "allowguest"))) ? 1 : 0;
01788       else if (!strcasecmp(var->name, "disallow"))
01789          ast_parse_allow_disallow(&prefs, &global_capability, var->value, 0);
01790       else if (!strcasecmp(var->name, "allow"))
01791          ast_parse_allow_disallow(&prefs, &global_capability, var->value, 1);
01792       else if (!strcasecmp(var->name, "context"))
01793          ast_copy_string(context, var->value, sizeof(context));
01794       else if (!strcasecmp(var->name, "bindaddr")) {
01795          if (!(hp = ast_gethostbyname(var->value, &ahp))) {
01796             ast_log(LOG_WARNING, "Invalid address: %s\n", var->value);
01797          } else {
01798             memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
01799          }
01800       }
01801 /*  Idea to allow for custom candidates  */
01802 /*
01803       else if (!strcasecmp(var->name, "candidate")) {
01804          candidate = gtalk_create_candidate(var->value);
01805          if (candidate) {
01806             candidate->next = global_candidates;
01807             global_candidates = candidate;
01808          }
01809       }
01810 */
01811    }
01812    while (cat) {
01813       if (strcasecmp(cat, "general")) {
01814          var = ast_variable_browse(cfg, cat);
01815          member = (struct gtalk *) malloc(sizeof(struct gtalk));
01816          memset(member, 0, sizeof(struct gtalk));
01817          ASTOBJ_INIT(member);
01818          ASTOBJ_WRLOCK(member);
01819          if (!strcasecmp(cat, "guest")) {
01820             ast_copy_string(member->name, "guest", sizeof(member->name));
01821             ast_copy_string(member->user, "guest", sizeof(member->user));
01822             ast_copy_string(member->context, context, sizeof(member->context));
01823             member->allowguest = allowguest;
01824             member->prefs = prefs;
01825             while (var) {
01826                if (!strcasecmp(var->name, "disallow"))
01827                   ast_parse_allow_disallow(&member->prefs, &member->capability,
01828                                      var->value, 0);
01829                else if (!strcasecmp(var->name, "allow"))
01830                   ast_parse_allow_disallow(&member->prefs, &member->capability,
01831                                      var->value, 1);
01832                else if (!strcasecmp(var->name, "context"))
01833                   ast_copy_string(member->context, var->value,
01834                               sizeof(member->context));
01835 /*  Idea to allow for custom candidates  */
01836 /*
01837                else if (!strcasecmp(var->name, "candidate")) {
01838                   candidate = gtalk_create_candidate(var->value);
01839                   if (candidate) {
01840                      candidate->next = member->ourcandidates;
01841                      member->ourcandidates = candidate;
01842                   }
01843                }
01844 */
01845                var = var->next;
01846             }
01847             ASTOBJ_UNLOCK(member);
01848             clients = ast_aji_get_clients();
01849             if (clients) {
01850                ASTOBJ_CONTAINER_TRAVERSE(clients, 1, {
01851                   ASTOBJ_WRLOCK(iterator);
01852                   ASTOBJ_WRLOCK(member);
01853                   member->connection = iterator;
01854                   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);
01855                   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);
01856                   ASTOBJ_UNLOCK(member);
01857                   ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
01858                   ASTOBJ_UNLOCK(iterator);
01859                });
01860             } else {
01861                ASTOBJ_UNLOCK(member);
01862                ASTOBJ_UNREF(member, gtalk_member_destroy);
01863             }
01864          } else {
01865             ASTOBJ_UNLOCK(member);
01866             if (gtalk_create_member(cat, var, allowguest, prefs, context, member))
01867                ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
01868             ASTOBJ_UNREF(member, gtalk_member_destroy);
01869          }
01870       }
01871       cat = ast_category_browse(cfg, cat);
01872    }
01873    gtalk_free_candidates(global_candidates);
01874    return 1;
01875 }
01876 
01877 /*! \brief Load module into PBX, register channel */
01878 static int load_module(void)
01879 {
01880    char *jabber_loaded = ast_module_helper("", "res_jabber.so", 0, 0, 0, 0);
01881    free(jabber_loaded);
01882    if (!jabber_loaded) {
01883       ast_log(LOG_ERROR, "chan_gtalk.so depends upon res_jabber.so\n");
01884       return AST_MODULE_LOAD_DECLINE;
01885    }
01886 
01887 #ifdef HAVE_GNUTLS   
01888         gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
01889 #endif /* HAVE_GNUTLS */
01890 
01891    ASTOBJ_CONTAINER_INIT(&gtalk_list);
01892    if (!gtalk_load_config()) {
01893       ast_log(LOG_ERROR, "Unable to read config file %s. Not loading module.\n", GOOGLE_CONFIG);
01894       return 0;
01895    }
01896 
01897    sched = sched_context_create();
01898    if (!sched) 
01899       ast_log(LOG_WARNING, "Unable to create schedule context\n");
01900 
01901    io = io_context_create();
01902    if (!io) 
01903       ast_log(LOG_WARNING, "Unable to create I/O context\n");
01904 
01905    if (ast_find_ourip(&__ourip, bindaddr)) {
01906       ast_log(LOG_WARNING, "Unable to get own IP address, Gtalk disabled\n");
01907       return 0;
01908    }
01909 
01910    ast_rtp_proto_register(&gtalk_rtp);
01911    ast_cli_register_multiple(gtalk_cli, sizeof(gtalk_cli) / sizeof(gtalk_cli[0]));
01912 
01913    /* Make sure we can register our channel type */
01914    if (ast_channel_register(&gtalk_tech)) {
01915       ast_log(LOG_ERROR, "Unable to register channel class %s\n", gtalk_tech.type);
01916       return -1;
01917    }
01918    return 0;
01919 }
01920 
01921 /*! \brief Reload module */
01922 static int reload(void)
01923 {
01924    return 0;
01925 }
01926 
01927 /*! \brief Unload the gtalk channel from Asterisk */
01928 static int unload_module(void)
01929 {
01930    struct gtalk_pvt *privates = NULL;
01931    ast_cli_unregister_multiple(gtalk_cli, sizeof(gtalk_cli) / sizeof(gtalk_cli[0]));
01932    /* First, take us out of the channel loop */
01933    ast_channel_unregister(&gtalk_tech);
01934    ast_rtp_proto_unregister(&gtalk_rtp);
01935 
01936    if (!ast_mutex_lock(&gtalklock)) {
01937       /* Hangup all interfaces if they have an owner */
01938       ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
01939          ASTOBJ_WRLOCK(iterator);
01940          privates = iterator->p;
01941          while(privates) {
01942             if (privates->owner)
01943                ast_softhangup(privates->owner, AST_SOFTHANGUP_APPUNLOAD);
01944             privates = privates->next;
01945          }
01946          iterator->p = NULL;
01947          ASTOBJ_UNLOCK(iterator);
01948       });
01949       ast_mutex_unlock(&gtalklock);
01950    } else {
01951       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01952       return -1;
01953    }
01954    ASTOBJ_CONTAINER_DESTROYALL(&gtalk_list, gtalk_member_destroy);
01955    ASTOBJ_CONTAINER_DESTROY(&gtalk_list);
01956    return 0;
01957 }
01958 
01959 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Gtalk Channel Driver",
01960       .load = load_module,
01961       .unload = unload_module,
01962       .reload = reload,
01963           );

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