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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    <depend>res_jabber</depend>
00031    <use>gnutls</use>
00032  ***/
00033 
00034 #include "asterisk.h"
00035 
00036 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 87906 $")
00037 
00038 #include <stdlib.h>
00039 #include <stdio.h>
00040 #include <string.h>
00041 #include <unistd.h>
00042 #include <sys/socket.h>
00043 #include <errno.h>
00044 #include <stdlib.h>
00045 #include <fcntl.h>
00046 #include <netdb.h>
00047 #include <netinet/in.h>
00048 #include <arpa/inet.h>
00049 #include <sys/signal.h>
00050 #include <iksemel.h>
00051 #include <pthread.h>
00052 
00053 #ifdef HAVE_GNUTLS
00054 #include <gcrypt.h>
00055 GCRY_THREAD_OPTION_PTHREAD_IMPL;
00056 #endif /* HAVE_GNUTLS */
00057 
00058 #include "asterisk/lock.h"
00059 #include "asterisk/channel.h"
00060 #include "asterisk/config.h"
00061 #include "asterisk/logger.h"
00062 #include "asterisk/module.h"
00063 #include "asterisk/pbx.h"
00064 #include "asterisk/options.h"
00065 #include "asterisk/lock.h"
00066 #include "asterisk/sched.h"
00067 #include "asterisk/io.h"
00068 #include "asterisk/rtp.h"
00069 #include "asterisk/acl.h"
00070 #include "asterisk/callerid.h"
00071 #include "asterisk/file.h"
00072 #include "asterisk/cli.h"
00073 #include "asterisk/app.h"
00074 #include "asterisk/musiconhold.h"
00075 #include "asterisk/manager.h"
00076 #include "asterisk/stringfields.h"
00077 #include "asterisk/utils.h"
00078 #include "asterisk/causes.h"
00079 #include "asterisk/astobj.h"
00080 #include "asterisk/abstract_jb.h"
00081 #include "asterisk/jabber.h"
00082 
00083 #define GOOGLE_CONFIG "gtalk.conf"
00084 
00085 #define GOOGLE_NS "http://www.google.com/session"
00086 
00087 
00088 /*! Global jitterbuffer configuration - by default, jb is disabled */
00089 static struct ast_jb_conf default_jbconf =
00090 {
00091    .flags = 0,
00092    .max_size = -1,
00093    .resync_threshold = -1,
00094    .impl = ""
00095 };
00096 static struct ast_jb_conf global_jbconf;
00097 
00098 enum gtalk_protocol {
00099    AJI_PROTOCOL_UDP = 1,
00100    AJI_PROTOCOL_SSLTCP = 2,
00101 };
00102 
00103 enum gtalk_connect_type {
00104    AJI_CONNECT_STUN = 1,
00105    AJI_CONNECT_LOCAL = 2,
00106    AJI_CONNECT_RELAY = 3,
00107 };
00108 
00109 struct gtalk_pvt {
00110    ast_mutex_t lock;                /*!< Channel private lock */
00111    time_t laststun;
00112    struct gtalk *parent;            /*!< Parent client */
00113    char sid[100];
00114    char us[AJI_MAX_JIDLEN];
00115    char them[AJI_MAX_JIDLEN];
00116    char ring[10];                   /*!< Message ID of ring */
00117    iksrule *ringrule;               /*!< Rule for matching RING request */
00118    int initiator;                   /*!< If we're the initiator */
00119    int alreadygone;
00120    int capability;
00121    struct ast_codec_pref prefs;
00122    struct gtalk_candidate *theircandidates;
00123    struct gtalk_candidate *ourcandidates;
00124    char cid_num[80];                /*!< Caller ID num */
00125    char cid_name[80];               /*!< Caller ID name */
00126    char exten[80];                  /*!< Called extension */
00127    struct ast_channel *owner;       /*!< Master Channel */
00128    struct ast_rtp *rtp;             /*!< RTP audio session */
00129    struct ast_rtp *vrtp;            /*!< RTP video session */
00130    int jointcapability;             /*!< Supported capability at both ends (codecs ) */
00131    int peercapability;
00132    struct gtalk_pvt *next; /* Next entity */
00133 };
00134 
00135 struct gtalk_candidate {
00136    char name[100];
00137    enum gtalk_protocol protocol;
00138    double preference;
00139    char username[100];
00140    char password[100];
00141    enum gtalk_connect_type type;
00142    char network[6];
00143    int generation;
00144    char ip[16];
00145    int port;
00146    int receipt;
00147    struct gtalk_candidate *next;
00148 };
00149 
00150 struct gtalk {
00151    ASTOBJ_COMPONENTS(struct gtalk);
00152    struct aji_client *connection;
00153    struct aji_buddy *buddy;
00154    struct gtalk_pvt *p;
00155    struct ast_codec_pref prefs;
00156    int amaflags;        /*!< AMA Flags */
00157    char user[AJI_MAX_JIDLEN];
00158    char context[AST_MAX_CONTEXT];
00159    char accountcode[AST_MAX_ACCOUNT_CODE];   /*!< Account code */
00160    int capability;
00161    ast_group_t callgroup;  /*!< Call group */
00162    ast_group_t pickupgroup;   /*!< Pickup group */
00163    int callingpres;     /*!< Calling presentation */
00164    int allowguest;
00165    char language[MAX_LANGUAGE];  /*!<  Default language for prompts */
00166    char musicclass[MAX_MUSICCLASS]; /*!<  Music on Hold class */
00167 };
00168 
00169 struct gtalk_container {
00170    ASTOBJ_CONTAINER_COMPONENTS(struct gtalk);
00171 };
00172 
00173 static const char desc[] = "Gtalk Channel";
00174 
00175 static int global_capability = AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_GSM | AST_FORMAT_H263;
00176 
00177 AST_MUTEX_DEFINE_STATIC(gtalklock); /*!< Protect the interface list (of gtalk_pvt's) */
00178 
00179 /* Forward declarations */
00180 static struct ast_channel *gtalk_request(const char *type, int format, void *data, int *cause);
00181 static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration);
00182 static int gtalk_digit_begin(struct ast_channel *ast, char digit);
00183 static int gtalk_digit_end(struct ast_channel *ast, char digit, unsigned int duration);
00184 static int gtalk_call(struct ast_channel *ast, char *dest, int timeout);
00185 static int gtalk_hangup(struct ast_channel *ast);
00186 static int gtalk_answer(struct ast_channel *ast);
00187 static int gtalk_newcall(struct gtalk *client, ikspak *pak);
00188 static struct ast_frame *gtalk_read(struct ast_channel *ast);
00189 static int gtalk_write(struct ast_channel *ast, struct ast_frame *f);
00190 static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen);
00191 static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
00192 static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen);
00193 static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid);
00194 static int gtalk_do_reload(int fd, int argc, char **argv);
00195 static int gtalk_show_channels(int fd, int argc, char **argv);
00196 /*----- RTP interface functions */
00197 static int gtalk_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp,
00198                         struct ast_rtp *vrtp, int codecs, int nat_active);
00199 static enum ast_rtp_get_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp);
00200 static int gtalk_get_codec(struct ast_channel *chan);
00201 
00202 /*! \brief PBX interface structure for channel registration */
00203 static const struct ast_channel_tech gtalk_tech = {
00204    .type = "Gtalk",
00205    .description = "Gtalk Channel Driver",
00206    .capabilities = ((AST_FORMAT_MAX_AUDIO << 1) - 1),
00207    .requester = gtalk_request,
00208    .send_digit_begin = gtalk_digit_begin,
00209    .send_digit_end = gtalk_digit_end,
00210    .bridge = ast_rtp_bridge,
00211    .call = gtalk_call,
00212    .hangup = gtalk_hangup,
00213    .answer = gtalk_answer,
00214    .read = gtalk_read,
00215    .write = gtalk_write,
00216    .exception = gtalk_read,
00217    .indicate = gtalk_indicate,
00218    .fixup = gtalk_fixup,
00219    .send_html = gtalk_sendhtml,
00220    .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER
00221 };
00222 
00223 static struct sockaddr_in bindaddr = { 0, }; /*!< The address we bind to */
00224 
00225 static struct sched_context *sched; /*!< The scheduling context */
00226 static struct io_context *io; /*!< The IO context */
00227 static struct in_addr __ourip;
00228 
00229 
00230 /*! \brief RTP driver interface */
00231 static struct ast_rtp_protocol gtalk_rtp = {
00232    type: "Gtalk",
00233    get_rtp_info: gtalk_get_rtp_peer,
00234    set_rtp_peer: gtalk_set_rtp_peer,
00235    get_codec: gtalk_get_codec,
00236 };
00237 
00238 static char show_channels_usage[] = 
00239 "Usage: gtalk show channels\n" 
00240 "       Shows current state of the Gtalk channels.\n";
00241 
00242 static char reload_usage[] = 
00243 "Usage: gtalk reload\n" 
00244 "       Reload gtalk channel driver.\n";
00245 
00246 
00247 static struct ast_cli_entry gtalk_cli[] = {
00248    {{ "gtalk", "reload", NULL}, gtalk_do_reload, "Reload GoogleTalk configuration", reload_usage },
00249    {{ "gtalk", "show", "channels", NULL}, gtalk_show_channels, "Show GoogleTalk channels", show_channels_usage },
00250  };
00251 
00252 
00253 
00254 static char externip[16];
00255 
00256 static struct gtalk_container gtalk_list;
00257 
00258 static void gtalk_member_destroy(struct gtalk *obj)
00259 {
00260    free(obj);
00261 }
00262 
00263 static struct gtalk *find_gtalk(char *name, char *connection)
00264 {
00265    struct gtalk *gtalk = NULL;
00266    char *domain = NULL , *s = NULL;
00267 
00268    if(strchr(connection, '@')) {
00269       s = ast_strdupa(connection);
00270       domain = strsep(&s, "@");
00271       ast_verbose("OOOOH domain = %s\n", domain);
00272    }
00273    gtalk = ASTOBJ_CONTAINER_FIND(&gtalk_list, name);
00274    if (!gtalk && strchr(name, '@'))
00275       gtalk = ASTOBJ_CONTAINER_FIND_FULL(&gtalk_list, name, user,,, strcasecmp);
00276 
00277    if (!gtalk) {           /* guest call */
00278       ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
00279          ASTOBJ_RDLOCK(iterator);
00280          if (!strcasecmp(iterator->name, "guest")) {
00281             if (!strcasecmp(iterator->connection->jid->partial, connection)) {
00282                gtalk = iterator;
00283             } else if (!strcasecmp(iterator->connection->name, connection)) {
00284                gtalk = iterator;
00285             } else if (iterator->connection->component && !strcasecmp(iterator->connection->user,domain)) {
00286                gtalk = iterator;
00287             }
00288          }
00289          ASTOBJ_UNLOCK(iterator);
00290 
00291          if (gtalk)
00292             break;
00293       });
00294 
00295    }
00296    return gtalk;
00297 }
00298 
00299 
00300 static int add_codec_to_answer(const struct gtalk_pvt *p, int codec, iks *dcodecs)
00301 {
00302    char *format = ast_getformatname(codec);
00303 
00304    if (!strcasecmp("ulaw", format)) {
00305       iks *payload_eg711u, *payload_pcmu;
00306       payload_pcmu = iks_new("payload-type");
00307       payload_eg711u = iks_new("payload-type");
00308    
00309       if(!payload_eg711u || !payload_pcmu) {
00310          if(payload_pcmu)
00311             iks_delete(payload_pcmu);
00312          if(payload_eg711u)
00313             iks_delete(payload_eg711u);
00314          ast_log(LOG_WARNING,"Failed to allocate iks node");
00315          return -1;
00316       }
00317       iks_insert_attrib(payload_pcmu, "id", "0");
00318       iks_insert_attrib(payload_pcmu, "name", "PCMU");
00319       iks_insert_attrib(payload_pcmu, "clockrate","8000");
00320       iks_insert_attrib(payload_pcmu, "bitrate","64000");
00321       iks_insert_attrib(payload_eg711u, "id", "100");
00322       iks_insert_attrib(payload_eg711u, "name", "EG711U");
00323       iks_insert_attrib(payload_eg711u, "clockrate","8000");
00324       iks_insert_attrib(payload_eg711u, "bitrate","64000");
00325       iks_insert_node(dcodecs, payload_pcmu);
00326       iks_insert_node(dcodecs, payload_eg711u);
00327    }
00328    if (!strcasecmp("alaw", format)) {
00329       iks *payload_eg711a, *payload_pcma;
00330       payload_pcma = iks_new("payload-type");
00331       payload_eg711a = iks_new("payload-type");
00332       if(!payload_eg711a || !payload_pcma) {
00333          if(payload_eg711a)
00334             iks_delete(payload_eg711a);
00335          if(payload_pcma)
00336             iks_delete(payload_pcma);
00337          ast_log(LOG_WARNING,"Failed to allocate iks node");
00338          return -1;
00339       }
00340       iks_insert_attrib(payload_pcma, "id", "8");
00341       iks_insert_attrib(payload_pcma, "name", "PCMA");
00342       iks_insert_attrib(payload_pcma, "clockrate","8000");
00343       iks_insert_attrib(payload_pcma, "bitrate","64000");
00344       payload_eg711a = iks_new("payload-type");
00345       iks_insert_attrib(payload_eg711a, "id", "101");
00346       iks_insert_attrib(payload_eg711a, "name", "EG711A");
00347       iks_insert_attrib(payload_eg711a, "clockrate","8000");
00348       iks_insert_attrib(payload_eg711a, "bitrate","64000");
00349       iks_insert_node(dcodecs, payload_pcma);
00350       iks_insert_node(dcodecs, payload_eg711a);
00351    }
00352    if (!strcasecmp("ilbc", format)) {
00353       iks *payload_ilbc = iks_new("payload-type");
00354       if(!payload_ilbc) {
00355          ast_log(LOG_WARNING,"Failed to allocate iks node");
00356          return -1;
00357       }
00358       iks_insert_attrib(payload_ilbc, "id", "97");
00359       iks_insert_attrib(payload_ilbc, "name", "iLBC");
00360       iks_insert_attrib(payload_ilbc, "clockrate","8000");
00361       iks_insert_attrib(payload_ilbc, "bitrate","13300");
00362       iks_insert_node(dcodecs, payload_ilbc);
00363    }
00364    if (!strcasecmp("g723", format)) {
00365       iks *payload_g723 = iks_new("payload-type");
00366       if(!payload_g723) {
00367          ast_log(LOG_WARNING,"Failed to allocate iks node");
00368          return -1;
00369       }
00370       iks_insert_attrib(payload_g723, "id", "4");
00371       iks_insert_attrib(payload_g723, "name", "G723");
00372       iks_insert_attrib(payload_g723, "clockrate","8000");
00373       iks_insert_attrib(payload_g723, "bitrate","6300");
00374       iks_insert_node(dcodecs, payload_g723);
00375    }
00376    if (!strcasecmp("speex", format)) {
00377       iks *payload_speex = iks_new("payload-type");
00378       if(!payload_speex) {
00379          ast_log(LOG_WARNING,"Failed to allocate iks node");
00380          return -1;
00381       }
00382       iks_insert_attrib(payload_speex, "id", "110");
00383       iks_insert_attrib(payload_speex, "name", "speex");
00384       iks_insert_attrib(payload_speex, "clockrate","8000");
00385       iks_insert_attrib(payload_speex, "bitrate","11000");
00386       iks_insert_node(dcodecs, payload_speex);
00387    }
00388    ast_rtp_lookup_code(p->rtp, 1, codec);
00389    return 0;
00390 }
00391 
00392 static int gtalk_invite(struct gtalk_pvt *p, char *to, char *from, char *sid, int initiator)
00393 {
00394    struct gtalk *client = p->parent;
00395    iks *iq, *gtalk, *dcodecs, *payload_telephone, *transport;
00396    int x;
00397    int pref_codec = 0;
00398    int alreadysent = 0;
00399 
00400 
00401    iq = iks_new("iq");
00402    gtalk = iks_new("session");
00403    dcodecs = iks_new("description");
00404    transport = iks_new("transport");
00405    payload_telephone = iks_new("payload-type");
00406    if (!(iq && gtalk && dcodecs && transport && payload_telephone)){
00407       if(iq)
00408          iks_delete(iq);
00409       if(gtalk)
00410          iks_delete(gtalk);
00411       if(dcodecs)
00412          iks_delete(dcodecs);
00413       if(transport)
00414          iks_delete(transport);
00415       if(payload_telephone)
00416          iks_delete(payload_telephone);
00417 
00418       ast_log(LOG_ERROR, "Could not allocate iksemel nodes\n");
00419       return 0;
00420    }
00421    iks_insert_attrib(dcodecs, "xmlns", "http://www.google.com/session/phone");
00422    iks_insert_attrib(dcodecs, "xml:lang", "en");
00423 
00424    for (x = 0; x < 32; x++) {
00425       if (!(pref_codec = ast_codec_pref_index(&client->prefs, x)))
00426          break;
00427       if (!(client->capability & pref_codec))
00428          continue;
00429       if (alreadysent & pref_codec)
00430          continue;
00431       add_codec_to_answer(p, pref_codec, dcodecs);
00432       alreadysent |= pref_codec;
00433    }
00434    
00435    iks_insert_attrib(payload_telephone, "id", "106");
00436    iks_insert_attrib(payload_telephone, "name", "telephone-event");
00437    iks_insert_attrib(payload_telephone, "clockrate", "8000");
00438    
00439    iks_insert_attrib(transport,"xmlns","http://www.google.com/transport/p2p");
00440    
00441    iks_insert_attrib(iq, "type", "set");
00442    iks_insert_attrib(iq, "to", to);
00443    iks_insert_attrib(iq, "from", from);
00444    iks_insert_attrib(iq, "id", client->connection->mid);
00445    ast_aji_increment_mid(client->connection->mid);
00446 
00447    iks_insert_attrib(gtalk, "xmlns", "http://www.google.com/session");
00448    iks_insert_attrib(gtalk, "type",initiator ? "initiate": "accept");
00449    iks_insert_attrib(gtalk, "initiator", initiator ? from : to);
00450    iks_insert_attrib(gtalk, "id", sid);
00451    iks_insert_node(iq, gtalk);
00452    iks_insert_node(gtalk, dcodecs);
00453    iks_insert_node(gtalk, transport);
00454    iks_insert_node(dcodecs, payload_telephone);
00455 
00456    iks_send(client->connection->p, iq);
00457    iks_delete(payload_telephone);
00458    iks_delete(transport);
00459    iks_delete(dcodecs);
00460    iks_delete(gtalk);
00461    iks_delete(iq);
00462    return 1;
00463 }
00464 
00465 static int gtalk_invite_response(struct gtalk_pvt *p, char *to , char *from, char *sid, int initiator)
00466 {
00467    iks *iq, *session, *transport;
00468    iq = iks_new("iq");
00469    session = iks_new("session");
00470    transport = iks_new("transport");
00471    if(!(iq && session && transport)) {
00472       if(iq)
00473          iks_delete(iq);
00474       if(session)
00475          iks_delete(session);
00476       if(transport)
00477          iks_delete(transport);
00478       ast_log(LOG_ERROR, " Unable to allocate IKS node\n");
00479       return -1;
00480    }
00481    iks_insert_attrib(iq, "from", from);
00482    iks_insert_attrib(iq, "to", to);
00483    iks_insert_attrib(iq, "type", "set");
00484    iks_insert_attrib(iq, "id",p->parent->connection->mid);
00485    ast_aji_increment_mid(p->parent->connection->mid);
00486    iks_insert_attrib(session, "type", "transport-accept");
00487    iks_insert_attrib(session, "id", sid);
00488    iks_insert_attrib(session, "initiator", initiator ? from : to);
00489    iks_insert_attrib(session, "xmlns", "http://www.google.com/session");
00490    iks_insert_attrib(transport, "xmlns", "http://www.google.com/transport/p2p");
00491    iks_insert_node(iq,session);
00492    iks_insert_node(session,transport);
00493    iks_send(p->parent->connection->p, iq);
00494    iks_delete(transport);
00495    iks_delete(session);
00496    iks_delete(iq);
00497    return 1;
00498 
00499 }
00500 
00501 static int gtalk_ringing_ack(void *data, ikspak *pak)
00502 {
00503    struct gtalk_pvt *p = data;
00504 
00505    if (p->ringrule)
00506       iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
00507    p->ringrule = NULL;
00508    if (p->owner)
00509       ast_queue_control(p->owner, AST_CONTROL_RINGING);
00510    return IKS_FILTER_EAT;
00511 }
00512 
00513 static int gtalk_answer(struct ast_channel *ast)
00514 {
00515    struct gtalk_pvt *p = ast->tech_pvt;
00516    int res = 0;
00517    
00518    if (option_debug)
00519       ast_log(LOG_DEBUG, "Answer!\n");
00520    ast_mutex_lock(&p->lock);
00521    gtalk_invite(p, p->them, p->us,p->sid, 0);
00522    ast_mutex_unlock(&p->lock);
00523    return res;
00524 }
00525 
00526 static enum ast_rtp_get_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp)
00527 {
00528    struct gtalk_pvt *p = chan->tech_pvt;
00529    enum ast_rtp_get_result res = AST_RTP_GET_FAILED;
00530 
00531    if (!p)
00532       return res;
00533 
00534    ast_mutex_lock(&p->lock);
00535    if (p->rtp){
00536       *rtp = p->rtp;
00537       res = AST_RTP_TRY_PARTIAL;
00538    }
00539    ast_mutex_unlock(&p->lock);
00540 
00541    return res;
00542 }
00543 
00544 static int gtalk_get_codec(struct ast_channel *chan)
00545 {
00546    struct gtalk_pvt *p = chan->tech_pvt;
00547    return p->peercapability;
00548 }
00549 
00550 static int gtalk_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp, int codecs, int nat_active)
00551 {
00552    struct gtalk_pvt *p;
00553 
00554    p = chan->tech_pvt;
00555    if (!p)
00556       return -1;
00557    ast_mutex_lock(&p->lock);
00558 
00559 /* if (rtp)
00560       ast_rtp_get_peer(rtp, &p->redirip);
00561    else
00562       memset(&p->redirip, 0, sizeof(p->redirip));
00563    p->redircodecs = codecs; */
00564 
00565    /* Reset lastrtprx timer */
00566    ast_mutex_unlock(&p->lock);
00567    return 0;
00568 }
00569 
00570 static int gtalk_response(struct gtalk *client, char *from, ikspak *pak, const char *reasonstr, const char *reasonstr2)
00571 {
00572    iks *response = NULL, *error = NULL, *reason = NULL;
00573    int res = -1;
00574 
00575    response = iks_new("iq");
00576    if (response) {
00577       iks_insert_attrib(response, "type", "result");
00578       iks_insert_attrib(response, "from", from);
00579       iks_insert_attrib(response, "to", iks_find_attrib(pak->x, "from"));
00580       iks_insert_attrib(response, "id", iks_find_attrib(pak->x, "id"));
00581       if (reasonstr) {
00582          error = iks_new("error");
00583          if (error) {
00584             iks_insert_attrib(error, "type", "cancel");
00585             reason = iks_new(reasonstr);
00586             if (reason)
00587                iks_insert_node(error, reason);
00588             iks_insert_node(response, error);
00589          }
00590       }
00591       iks_send(client->connection->p, response);
00592       if (reason)
00593          iks_delete(reason);
00594       if (error)
00595          iks_delete(error);
00596       iks_delete(response);
00597       res = 0;
00598    }
00599    return res;
00600 }
00601 
00602 static int gtalk_is_answered(struct gtalk *client, ikspak *pak)
00603 {
00604    struct gtalk_pvt *tmp;
00605    char *from;
00606    ast_log(LOG_DEBUG, "The client is %s\n", client->name);
00607    /* Make sure our new call doesn't exist yet */
00608    for (tmp = client->p; tmp; tmp = tmp->next) {
00609       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
00610          break;
00611    }
00612    
00613    from = iks_find_attrib(pak->x, "to");
00614    if(!from)
00615       from = client->connection->jid->full;
00616 
00617    if (tmp) {
00618       if (tmp->owner)
00619          ast_queue_control(tmp->owner, AST_CONTROL_ANSWER);
00620    } else
00621       ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
00622    gtalk_response(client, from, pak, NULL, NULL);
00623    return 1;
00624 }
00625 
00626 static int gtalk_is_accepted(struct gtalk *client, ikspak *pak)
00627 {
00628    struct gtalk_pvt *tmp;
00629    char *from;
00630 
00631    ast_log(LOG_DEBUG, "The client is %s\n", client->name);
00632    /* find corresponding call */
00633    for (tmp = client->p; tmp; tmp = tmp->next) {
00634       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
00635          break;
00636    }
00637 
00638    from = iks_find_attrib(pak->x, "to");
00639    if(!from)
00640       from = client->connection->jid->full;
00641 
00642    if (!tmp)
00643       ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
00644 
00645    /* answer 'iq' packet to let the remote peer know that we're alive */
00646    gtalk_response(client, from, pak, NULL, NULL);
00647    return 1;
00648 }
00649 
00650 static int gtalk_handle_dtmf(struct gtalk *client, ikspak *pak)
00651 {
00652    struct gtalk_pvt *tmp;
00653    iks *dtmfnode = NULL, *dtmfchild = NULL;
00654    char *dtmf;
00655    char *from;
00656    /* Make sure our new call doesn't exist yet */
00657    for (tmp = client->p; tmp; tmp = tmp->next) {
00658       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) || iks_find_with_attrib(pak->x, "gtalk", "sid", tmp->sid))
00659          break;
00660    }
00661    from = iks_find_attrib(pak->x, "to");
00662    if(!from)
00663       from = client->connection->jid->full;
00664 
00665 
00666    if (tmp) {
00667       if(iks_find_with_attrib(pak->x, "dtmf-method", "method", "rtp")) {
00668          gtalk_response(client, from, pak,
00669                "feature-not-implemented xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'",
00670                "unsupported-dtmf-method xmlns='http://jabber.org/protocol/gtalk/info/dtmf#errors'");
00671          return -1;
00672       }
00673       if ((dtmfnode = iks_find(pak->x, "dtmf"))) {
00674          if((dtmf = iks_find_attrib(dtmfnode, "code"))) {
00675             if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-up")) {
00676                struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
00677                f.subclass = dtmf[0];
00678                ast_queue_frame(tmp->owner, &f);
00679                ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
00680             } else if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-down")) {
00681                struct ast_frame f = {AST_FRAME_DTMF_END, };
00682                f.subclass = dtmf[0];
00683                ast_queue_frame(tmp->owner, &f);
00684                ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
00685             } else if(iks_find_attrib(pak->x, "dtmf")) { /* 250 millasecond default */
00686                struct ast_frame f = {AST_FRAME_DTMF, };
00687                f.subclass = dtmf[0];
00688                ast_queue_frame(tmp->owner, &f);
00689                ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
00690             }
00691          }
00692       } else if ((dtmfnode = iks_find_with_attrib(pak->x, "gtalk", "action", "session-info"))) {
00693          if((dtmfchild = iks_find(dtmfnode, "dtmf"))) {
00694             if((dtmf = iks_find_attrib(dtmfchild, "code"))) {
00695                if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-up")) {
00696                   struct ast_frame f = {AST_FRAME_DTMF_END, };
00697                   f.subclass = dtmf[0];
00698                   ast_queue_frame(tmp->owner, &f);
00699                   ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
00700                } else if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-down")) {
00701                   struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
00702                   f.subclass = dtmf[0];
00703                   ast_queue_frame(tmp->owner, &f);
00704                   ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
00705                }
00706             }
00707          }
00708       }
00709       gtalk_response(client, from, pak, NULL, NULL);
00710       return 1;
00711    } else
00712       ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
00713 
00714    gtalk_response(client, from, pak, NULL, NULL);
00715    return 1;
00716 }
00717 
00718 static int gtalk_hangup_farend(struct gtalk *client, ikspak *pak)
00719 {
00720    struct gtalk_pvt *tmp;
00721    char *from;
00722 
00723    ast_log(LOG_DEBUG, "The client is %s\n", client->name);
00724    /* Make sure our new call doesn't exist yet */
00725    for (tmp = client->p; tmp; tmp = tmp->next) {
00726       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
00727          break;
00728    }
00729    from = iks_find_attrib(pak->x, "to");
00730    if(!from)
00731       from = client->connection->jid->full;
00732 
00733    if (tmp) {
00734       tmp->alreadygone = 1;
00735       if (tmp->owner)
00736          ast_queue_hangup(tmp->owner);
00737    } else
00738       ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
00739    gtalk_response(client, from, pak, NULL, NULL);
00740    return 1;
00741 }
00742 
00743 static int gtalk_create_candidates(struct gtalk *client, struct gtalk_pvt *p, char *sid, char *from, char *to)
00744 {
00745    struct gtalk_candidate *tmp;
00746    struct aji_client *c = client->connection;
00747    struct gtalk_candidate *ours1 = NULL, *ours2 = NULL;
00748    struct sockaddr_in sin;
00749    struct sockaddr_in dest;
00750    struct in_addr us;
00751    iks *iq, *gtalk, *candidate, *transport;
00752    char user[17], pass[17], preference[5], port[7];
00753 
00754 
00755    iq = iks_new("iq");
00756    gtalk = iks_new("session");
00757    candidate = iks_new("candidate");
00758    transport = iks_new("transport");
00759    if (!iq || !gtalk || !candidate || !transport) {
00760       ast_log(LOG_ERROR, "Memory allocation error\n");
00761       goto safeout;
00762    }
00763    ours1 = ast_calloc(1, sizeof(*ours1));
00764    ours2 = ast_calloc(1, sizeof(*ours2));
00765    if (!ours1 || !ours2)
00766       goto safeout;
00767 
00768    iks_insert_attrib(transport, "xmlns","http://www.google.com/transport/p2p");
00769    iks_insert_node(iq, gtalk);
00770    iks_insert_node(gtalk,transport);
00771    iks_insert_node(transport, candidate);
00772 
00773    for (; p; p = p->next) {
00774       if (!strcasecmp(p->sid, sid))
00775          break;
00776    }
00777 
00778    if (!p) {
00779       ast_log(LOG_NOTICE, "No matching gtalk session - SID %s!\n", sid);
00780       goto safeout;
00781    }
00782 
00783    ast_rtp_get_us(p->rtp, &sin);
00784    ast_find_ourip(&us, bindaddr);
00785 
00786    /* Setup our gtalk candidates */
00787    ast_copy_string(ours1->name, "rtp", sizeof(ours1->name));
00788    ours1->port = ntohs(sin.sin_port);
00789    ours1->preference = 1;
00790    snprintf(user, sizeof(user), "%08lx%08lx", ast_random(), ast_random());
00791    snprintf(pass, sizeof(pass), "%08lx%08lx", ast_random(), ast_random());
00792    ast_copy_string(ours1->username, user, sizeof(ours1->username));
00793    ast_copy_string(ours1->password, pass, sizeof(ours1->password));
00794    ast_copy_string(ours1->ip, ast_inet_ntoa(us), sizeof(ours1->ip));
00795    ours1->protocol = AJI_PROTOCOL_UDP;
00796    ours1->type = AJI_CONNECT_LOCAL;
00797    ours1->generation = 0;
00798    p->ourcandidates = ours1;
00799 
00800    if (!ast_strlen_zero(externip)) {
00801       /* XXX We should really stun for this one not just go with externip XXX */
00802       snprintf(user, sizeof(user), "%08lx%08lx", ast_random(), ast_random());
00803       snprintf(pass, sizeof(pass), "%08lx%08lx", ast_random(), ast_random());
00804       ast_copy_string(ours2->username, user, sizeof(ours2->username));
00805       ast_copy_string(ours2->password, pass, sizeof(ours2->password));
00806       ast_copy_string(ours2->ip, externip, sizeof(ours2->ip));
00807       ast_copy_string(ours2->name, "rtp", sizeof(ours1->name));
00808       ours2->port = ntohs(sin.sin_port);
00809       ours2->preference = 0.9;
00810       ours2->protocol = AJI_PROTOCOL_UDP;
00811       ours2->type = AJI_CONNECT_STUN;
00812       ours2->generation = 0;
00813       ours1->next = ours2;
00814       ours2 = NULL;
00815    }
00816    ours1 = NULL;
00817    dest.sin_addr = __ourip;
00818    dest.sin_port = sin.sin_port;
00819 
00820 
00821    for (tmp = p->ourcandidates; tmp; tmp = tmp->next) {
00822       snprintf(port, sizeof(port), "%d", tmp->port);
00823       snprintf(preference, sizeof(preference), "%.2f", tmp->preference);
00824       iks_insert_attrib(iq, "from", to);
00825       iks_insert_attrib(iq, "to", from);
00826       iks_insert_attrib(iq, "type", "set");
00827       iks_insert_attrib(iq, "id", c->mid);
00828       ast_aji_increment_mid(c->mid);
00829       iks_insert_attrib(gtalk, "type", "transport-info");
00830       iks_insert_attrib(gtalk, "id", sid);
00831       iks_insert_attrib(gtalk, "initiator", (p->initiator) ? to : from);
00832       iks_insert_attrib(gtalk, "xmlns", GOOGLE_NS);
00833       iks_insert_attrib(candidate, "name", tmp->name);
00834       iks_insert_attrib(candidate, "address", tmp->ip);
00835       iks_insert_attrib(candidate, "port", port);
00836       iks_insert_attrib(candidate, "username", tmp->username);
00837       iks_insert_attrib(candidate, "password", tmp->password);
00838       iks_insert_attrib(candidate, "preference", preference);
00839       if (tmp->protocol == AJI_PROTOCOL_UDP)
00840          iks_insert_attrib(candidate, "protocol", "udp");
00841       if (tmp->protocol == AJI_PROTOCOL_SSLTCP)
00842          iks_insert_attrib(candidate, "protocol", "ssltcp");
00843       if (tmp->type == AJI_CONNECT_STUN)
00844          iks_insert_attrib(candidate, "type", "stun");
00845       if (tmp->type == AJI_CONNECT_LOCAL)
00846          iks_insert_attrib(candidate, "type", "local");
00847       if (tmp->type == AJI_CONNECT_RELAY)
00848          iks_insert_attrib(candidate, "type", "relay");
00849       iks_insert_attrib(candidate, "network", "0");
00850       iks_insert_attrib(candidate, "generation", "0");
00851       iks_send(c->p, iq);
00852    }
00853    p->laststun = 0;
00854 
00855 safeout:
00856    if (ours1)
00857       free(ours1);
00858    if (ours2)
00859       free(ours2);
00860    if (iq)
00861       iks_delete(iq);
00862    if (gtalk)
00863       iks_delete(gtalk);
00864    if (candidate)
00865       iks_delete(candidate);
00866    if(transport)
00867       iks_delete(transport);
00868    return 1;
00869 }
00870 
00871 static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid)
00872 {
00873    struct gtalk_pvt *tmp = NULL;
00874    struct aji_resource *resources = NULL;
00875    struct aji_buddy *buddy;
00876    char idroster[200];
00877    char *data, *exten = NULL;
00878 
00879    if (option_debug)
00880       ast_log(LOG_DEBUG, "The client is %s for alloc\n", client->name);
00881    if (!sid && !strchr(them, '/')) {   /* I started call! */
00882       if (!strcasecmp(client->name, "guest")) {
00883          buddy = ASTOBJ_CONTAINER_FIND(&client->connection->buddies, them);
00884          if (buddy)
00885             resources = buddy->resources;
00886       } else if (client->buddy)
00887          resources = client->buddy->resources;
00888       while (resources) {
00889          if (resources->cap->jingle) {
00890             break;
00891          }
00892          resources = resources->next;
00893       }
00894       if (resources)
00895          snprintf(idroster, sizeof(idroster), "%s/%s", them, resources->resource);
00896       else {
00897          ast_log(LOG_ERROR, "no gtalk capable clients to talk to.\n");
00898          return NULL;
00899       }
00900    }
00901    if (!(tmp = ast_calloc(1, sizeof(*tmp)))) {
00902       return NULL;
00903    }
00904    if (sid) {
00905       ast_copy_string(tmp->sid, sid, sizeof(tmp->sid));
00906       ast_copy_string(tmp->them, them, sizeof(tmp->them));
00907       ast_copy_string(tmp->us, us, sizeof(tmp->us));
00908    } else {
00909       snprintf(tmp->sid, sizeof(tmp->sid), "%08lx%08lx", ast_random(), ast_random());
00910       ast_copy_string(tmp->them, idroster, sizeof(tmp->them));
00911       ast_copy_string(tmp->us, us, sizeof(tmp->us));
00912       tmp->initiator = 1;
00913    }
00914    tmp->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, bindaddr.sin_addr);
00915    tmp->parent = client;
00916    if (!tmp->rtp) {
00917       ast_log(LOG_WARNING, "Out of RTP sessions?\n");
00918       free(tmp);
00919       return NULL;
00920    }
00921 
00922    if(strchr(tmp->us, '/')) {
00923       data = ast_strdupa(tmp->us);
00924       exten = strsep(&data, "/");
00925    } else
00926       exten = tmp->us;
00927    ast_copy_string(tmp->exten,  exten, sizeof(tmp->exten));
00928    ast_mutex_init(&tmp->lock);
00929    ast_mutex_lock(&gtalklock);
00930    tmp->next = client->p;
00931    client->p = tmp;
00932    ast_mutex_unlock(&gtalklock);
00933    return tmp;
00934 }
00935 
00936 /*! \brief Start new gtalk channel */
00937 static struct ast_channel *gtalk_new(struct gtalk *client, struct gtalk_pvt *i, int state, const char *title)
00938 {
00939    struct ast_channel *tmp;
00940    int fmt;
00941    int what;
00942    const char *n2;
00943    char *data = NULL, *cid = NULL;
00944 
00945    if (title)
00946       n2 = title;
00947    else
00948       n2 = i->us;
00949    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);
00950    if (!tmp) {
00951       ast_log(LOG_WARNING, "Unable to allocate Gtalk channel structure!\n");
00952       return NULL;
00953    }
00954    tmp->tech = &gtalk_tech;
00955 
00956    /* Select our native format based on codec preference until we receive
00957       something from another device to the contrary. */
00958 /* ast_verbose("XXXXXXXXXXXXX\nXXX i->jointcapability = %X\nXXX i->capability = %X\nXXX global_capability %X\n XXXXXXXXXXXX\n",i->jointcapability,i->capability,global_capability); */
00959    if (i->jointcapability)
00960       what = i->jointcapability;
00961    else if (i->capability)
00962       what = i->capability;
00963    else
00964       what = global_capability;
00965    tmp->nativeformats = ast_codec_choose(&i->prefs, what, 1) | (i->jointcapability & AST_FORMAT_VIDEO_MASK);
00966    fmt = ast_best_codec(tmp->nativeformats);
00967 
00968    if (i->rtp) {
00969       ast_rtp_setstun(i->rtp, 1);
00970       tmp->fds[0] = ast_rtp_fd(i->rtp);
00971       tmp->fds[1] = ast_rtcp_fd(i->rtp);
00972    }
00973    if (i->vrtp) {
00974       ast_rtp_setstun(i->rtp, 1);
00975       tmp->fds[2] = ast_rtp_fd(i->vrtp);
00976       tmp->fds[3] = ast_rtcp_fd(i->vrtp);
00977    }
00978    if (state == AST_STATE_RING)
00979       tmp->rings = 1;
00980    tmp->adsicpe = AST_ADSI_UNAVAILABLE;
00981    tmp->writeformat = fmt;
00982    tmp->rawwriteformat = fmt;
00983    tmp->readformat = fmt;
00984    tmp->rawreadformat = fmt;
00985    tmp->tech_pvt = i;
00986 
00987    tmp->callgroup = client->callgroup;
00988    tmp->pickupgroup = client->pickupgroup;
00989    tmp->cid.cid_pres = client->callingpres;
00990    if (!ast_strlen_zero(client->accountcode))
00991       ast_string_field_set(tmp, accountcode, client->accountcode);
00992    if (client->amaflags)
00993       tmp->amaflags = client->amaflags;
00994    if (!ast_strlen_zero(client->language))
00995       ast_string_field_set(tmp, language, client->language);
00996    if (!ast_strlen_zero(client->musicclass))
00997       ast_string_field_set(tmp, musicclass, client->musicclass);
00998    i->owner = tmp;
00999    ast_module_ref(ast_module_info->self);
01000    ast_copy_string(tmp->context, client->context, sizeof(tmp->context));
01001    ast_copy_string(tmp->exten, i->exten, sizeof(tmp->exten));
01002    /* Don't use ast_set_callerid() here because it will
01003     * generate a needless NewCallerID event */
01004    if (!strcasecmp(client->name, "guest")) {
01005       data = ast_strdupa(i->them);
01006       if (strchr(data, '/')) {
01007          cid = strsep(&data, "/");
01008       } else
01009          cid = data;
01010    } else {
01011       data =  ast_strdupa(client->user);
01012       cid = data;
01013    }
01014    cid = strsep(&cid, "@");
01015    tmp->cid.cid_ani = ast_strdup(cid);
01016    if (!ast_strlen_zero(i->exten) && strcmp(i->exten, "s"))
01017       tmp->cid.cid_dnid = ast_strdup(i->exten);
01018    tmp->priority = 1;
01019    if (i->rtp)
01020       ast_jb_configure(tmp, &global_jbconf);
01021    if (state != AST_STATE_DOWN && ast_pbx_start(tmp)) {
01022       ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
01023       tmp->hangupcause = AST_CAUSE_SWITCH_CONGESTION;
01024       ast_hangup(tmp);
01025       tmp = NULL;
01026    }
01027 
01028    return tmp;
01029 }
01030 
01031 static int gtalk_action(struct gtalk *client, struct gtalk_pvt *p, const char *action)
01032 {
01033    iks *request, *session = NULL;
01034    int res = -1;
01035 
01036    request = iks_new("iq");
01037    if (request) {
01038       iks_insert_attrib(request, "type", "set");
01039       iks_insert_attrib(request, "from", p->us);
01040       iks_insert_attrib(request, "to", p->them);
01041       iks_insert_attrib(request, "id", client->connection->mid);
01042       ast_aji_increment_mid(client->connection->mid);
01043       session = iks_new("session");
01044       if (session) {
01045          iks_insert_attrib(session, "type", action);
01046          iks_insert_attrib(session, "id", p->sid);
01047          iks_insert_attrib(session, "initiator", p->initiator ? p->us : p->them);
01048          iks_insert_attrib(session, "xmlns", "http://www.google.com/session");
01049          iks_insert_node(request, session);
01050          iks_send(client->connection->p, request);
01051          iks_delete(session);
01052          res = 0;
01053       }
01054       iks_delete(request);
01055    }
01056    return res;
01057 }
01058 
01059 static void gtalk_free_candidates(struct gtalk_candidate *candidate)
01060 {
01061    struct gtalk_candidate *last;
01062    while (candidate) {
01063       last = candidate;
01064       candidate = candidate->next;
01065       free(last);
01066    }
01067 }
01068 
01069 static void gtalk_free_pvt(struct gtalk *client, struct gtalk_pvt *p)
01070 {
01071    struct gtalk_pvt *cur, *prev = NULL;
01072    cur = client->p;
01073    while (cur) {
01074       if (cur == p) {
01075          if (prev)
01076             prev->next = p->next;
01077          else
01078             client->p = p->next;
01079          break;
01080       }
01081       prev = cur;
01082       cur = cur->next;
01083    }
01084    if (p->ringrule)
01085       iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
01086    if (p->owner)
01087       ast_log(LOG_WARNING, "Uh oh, there's an owner, this is going to be messy.\n");
01088    if (p->rtp)
01089       ast_rtp_destroy(p->rtp);
01090    if (p->vrtp)
01091       ast_rtp_destroy(p->vrtp);
01092    gtalk_free_candidates(p->theircandidates);
01093    free(p);
01094 }
01095 
01096 
01097 static int gtalk_newcall(struct gtalk *client, ikspak *pak)
01098 {
01099    struct gtalk_pvt *p, *tmp = client->p;
01100    struct ast_channel *chan;
01101    int res;
01102    iks *codec;
01103    char *from = NULL;
01104    /* Make sure our new call doesn't exist yet */
01105    from = iks_find_attrib(pak->x,"to");
01106    if(!from)
01107       from = client->connection->jid->full;
01108    
01109    while (tmp) {
01110       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
01111          ast_log(LOG_NOTICE, "Ignoring duplicate call setup on SID %s\n", tmp->sid);
01112          gtalk_response(client, from, pak, "out-of-order", NULL);
01113          return -1;
01114       }
01115       tmp = tmp->next;
01116    }
01117 
01118    p = gtalk_alloc(client, from, pak->from->full, iks_find_attrib(pak->query, "id"));
01119    if (!p) {
01120       ast_log(LOG_WARNING, "Unable to allocate gtalk structure!\n");
01121       return -1;
01122    }
01123    chan = gtalk_new(client, p, AST_STATE_DOWN, pak->from->user);
01124    if (chan) {
01125       ast_mutex_lock(&p->lock);
01126       ast_copy_string(p->them, pak->from->full, sizeof(p->them));
01127       if (iks_find_attrib(pak->query, "id")) {
01128          ast_copy_string(p->sid, iks_find_attrib(pak->query, "id"),
01129                      sizeof(p->sid));
01130       }
01131 
01132       codec = iks_child(iks_child(iks_child(pak->x)));
01133       while (codec) {
01134          ast_rtp_set_m_type(p->rtp, atoi(iks_find_attrib(codec, "id")));
01135          ast_rtp_set_rtpmap_type(p->rtp, atoi(iks_find_attrib(codec, "id")), "audio",
01136                   iks_find_attrib(codec, "name"), 0);
01137          codec = iks_next(codec);
01138       }
01139       
01140       ast_mutex_unlock(&p->lock);
01141       ast_setstate(chan, AST_STATE_RING);
01142       res = ast_pbx_start(chan);
01143 
01144       switch (res) {
01145       case AST_PBX_FAILED:
01146          ast_log(LOG_WARNING, "Failed to start PBX :(\n");
01147          gtalk_response(client, from, pak, "service-unavailable", NULL);
01148          break;
01149       case AST_PBX_CALL_LIMIT:
01150          ast_log(LOG_WARNING, "Failed to start PBX (call limit reached) \n");
01151          gtalk_response(client, from, pak, "service-unavailable", NULL);
01152          break;
01153       case AST_PBX_SUCCESS:
01154          gtalk_response(client, from, pak, NULL, NULL);
01155          gtalk_invite_response(p, p->them, p->us,p->sid, 0);
01156          gtalk_create_candidates(client, p, p->sid, p->them, p->us);
01157          /* nothing to do */
01158          break;
01159       }
01160    } else {
01161       gtalk_free_pvt(client, p);
01162    }
01163    return 1;
01164 }
01165 
01166 static int gtalk_update_stun(struct gtalk *client, struct gtalk_pvt *p)
01167 {
01168    struct gtalk_candidate *tmp;
01169    struct hostent *hp;
01170    struct ast_hostent ahp;
01171    struct sockaddr_in sin;
01172    struct sockaddr_in aux;
01173 
01174    if (time(NULL) == p->laststun)
01175       return 0;
01176 
01177    tmp = p->theircandidates;
01178    p->laststun = time(NULL);
01179    while (tmp) {
01180       char username[256];
01181 
01182       /* Find the IP address of the host */
01183       hp = ast_gethostbyname(tmp->ip, &ahp);
01184       sin.sin_family = AF_INET;
01185       memcpy(&sin.sin_addr, hp->h_addr, sizeof(sin.sin_addr));
01186       sin.sin_port = htons(tmp->port);
01187       snprintf(username, sizeof(username), "%s%s", tmp->username,
01188           p->ourcandidates->username);
01189       
01190       /* Find out the result of the STUN */
01191       ast_rtp_get_peer(p->rtp, &aux);
01192 
01193       /* If the STUN result is different from the IP of the hostname,
01194          lock on the stun IP of the hostname advertised by the
01195          remote client */
01196       if (aux.sin_addr.s_addr && 
01197           aux.sin_addr.s_addr != sin.sin_addr.s_addr)
01198          ast_rtp_stun_request(p->rtp, &aux, username);
01199       else 
01200          ast_rtp_stun_request(p->rtp, &sin, username);
01201       
01202       if (aux.sin_addr.s_addr && option_debug > 3) {
01203          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);
01204          ast_log(LOG_DEBUG, "Sending STUN request to %s\n", tmp->ip);
01205       }
01206 
01207       tmp = tmp->next;
01208    }
01209    return 1;
01210 }
01211 
01212 static int gtalk_add_candidate(struct gtalk *client, ikspak *pak)
01213 {
01214    struct gtalk_pvt *p = NULL, *tmp = NULL;
01215    struct aji_client *c = client->connection;
01216    struct gtalk_candidate *newcandidate = NULL;
01217    iks *traversenodes = NULL, *receipt = NULL;
01218    char *from;
01219 
01220    from = iks_find_attrib(pak->x,"to");
01221    if(!from)
01222       from = c->jid->full;
01223 
01224    for (tmp = client->p; tmp; tmp = tmp->next) {
01225       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
01226          p = tmp;
01227          break;
01228       }
01229    }
01230 
01231    if (!p)
01232       return -1;
01233 
01234    traversenodes = pak->query;
01235    while(traversenodes) {
01236       if(!strcasecmp(iks_name(traversenodes), "session")) {
01237          traversenodes = iks_child(traversenodes);
01238          continue;
01239       }
01240       if(!strcasecmp(iks_name(traversenodes), "transport")) {
01241          traversenodes = iks_child(traversenodes);
01242          continue;
01243       }
01244       if(!strcasecmp(iks_name(traversenodes), "candidate")) {
01245          newcandidate = ast_calloc(1, sizeof(*newcandidate));
01246          if (!newcandidate)
01247             return 0;
01248          ast_copy_string(newcandidate->name, iks_find_attrib(traversenodes, "name"),
01249                      sizeof(newcandidate->name));
01250          ast_copy_string(newcandidate->ip, iks_find_attrib(traversenodes, "address"),
01251                      sizeof(newcandidate->ip));
01252          newcandidate->port = atoi(iks_find_attrib(traversenodes, "port"));
01253          ast_copy_string(newcandidate->username, iks_find_attrib(traversenodes, "username"),
01254                      sizeof(newcandidate->username));
01255          ast_copy_string(newcandidate->password, iks_find_attrib(traversenodes, "password"),
01256                      sizeof(newcandidate->password));
01257          newcandidate->preference = atof(iks_find_attrib(traversenodes, "preference"));
01258          if (!strcasecmp(iks_find_attrib(traversenodes, "protocol"), "udp"))
01259             newcandidate->protocol = AJI_PROTOCOL_UDP;
01260          if (!strcasecmp(iks_find_attrib(traversenodes, "protocol"), "ssltcp"))
01261             newcandidate->protocol = AJI_PROTOCOL_SSLTCP;
01262       
01263          if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "stun"))
01264             newcandidate->type = AJI_CONNECT_STUN;
01265          if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "local"))
01266             newcandidate->type = AJI_CONNECT_LOCAL;
01267          if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "relay"))
01268             newcandidate->type = AJI_CONNECT_RELAY;
01269          ast_copy_string(newcandidate->network, iks_find_attrib(traversenodes, "network"),
01270                      sizeof(newcandidate->network));
01271          newcandidate->generation = atoi(iks_find_attrib(traversenodes, "generation"));
01272          newcandidate->next = NULL;
01273       
01274          newcandidate->next = p->theircandidates;
01275          p->theircandidates = newcandidate;
01276          p->laststun = 0;
01277          gtalk_update_stun(p->parent, p);
01278          newcandidate = NULL;
01279       }
01280       traversenodes = iks_next(traversenodes);
01281    }
01282    
01283    receipt = iks_new("iq");
01284    iks_insert_attrib(receipt, "type", "result");
01285    iks_insert_attrib(receipt, "from", from);
01286    iks_insert_attrib(receipt, "to", iks_find_attrib(pak->x, "from"));
01287    iks_insert_attrib(receipt, "id", iks_find_attrib(pak->x, "id"));
01288    iks_send(c->p, receipt);
01289    iks_delete(receipt);
01290 
01291    return 1;
01292 }
01293 
01294 static struct ast_frame *gtalk_rtp_read(struct ast_channel *ast, struct gtalk_pvt *p)
01295 {
01296    struct ast_frame *f;
01297 
01298    if (!p->rtp)
01299       return &ast_null_frame;
01300    f = ast_rtp_read(p->rtp);
01301    gtalk_update_stun(p->parent, p);
01302    if (p->owner) {
01303       /* We already hold the channel lock */
01304       if (f->frametype == AST_FRAME_VOICE) {
01305          if (f->subclass != (p->owner->nativeformats & AST_FORMAT_AUDIO_MASK)) {
01306             if (option_debug)
01307                ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass);
01308             p->owner->nativeformats =
01309                (p->owner->nativeformats & AST_FORMAT_VIDEO_MASK) | f->subclass;
01310             ast_set_read_format(p->owner, p->owner->readformat);
01311             ast_set_write_format(p->owner, p->owner->writeformat);
01312          }
01313 /*       if ((ast_test_flag(p, SIP_DTMF) == SIP_DTMF_INBAND) && p->vad) {
01314             f = ast_dsp_process(p->owner, p->vad, f);
01315             if (option_debug && f && (f->frametype == AST_FRAME_DTMF))
01316                ast_log(LOG_DEBUG, "* Detected inband DTMF '%c'\n", f->subclass);
01317               } */
01318       }
01319    }
01320    return f;
01321 }
01322 
01323 static struct ast_frame *gtalk_read(struct ast_channel *ast)
01324 {
01325    struct ast_frame *fr;
01326    struct gtalk_pvt *p = ast->tech_pvt;
01327 
01328    ast_mutex_lock(&p->lock);
01329    fr = gtalk_rtp_read(ast, p);
01330    ast_mutex_unlock(&p->lock);
01331    return fr;
01332 }
01333 
01334 /*! \brief Send frame to media channel (rtp) */
01335 static int gtalk_write(struct ast_channel *ast, struct ast_frame *frame)
01336 {
01337    struct gtalk_pvt *p = ast->tech_pvt;
01338    int res = 0;
01339 
01340    switch (frame->frametype) {
01341    case AST_FRAME_VOICE:
01342       if (!(frame->subclass & ast->nativeformats)) {
01343          ast_log(LOG_WARNING,
01344                "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
01345                frame->subclass, ast->nativeformats, ast->readformat,
01346                ast->writeformat);
01347          return 0;
01348       }
01349       if (p) {
01350          ast_mutex_lock(&p->lock);
01351          if (p->rtp) {
01352             res = ast_rtp_write(p->rtp, frame);
01353          }
01354          ast_mutex_unlock(&p->lock);
01355       }
01356       break;
01357    case AST_FRAME_VIDEO:
01358       if (p) {
01359          ast_mutex_lock(&p->lock);
01360          if (p->vrtp) {
01361             res = ast_rtp_write(p->vrtp, frame);
01362          }
01363          ast_mutex_unlock(&p->lock);
01364       }
01365       break;
01366    case AST_FRAME_IMAGE:
01367       return 0;
01368       break;
01369    default:
01370       ast_log(LOG_WARNING, "Can't send %d type frames with Gtalk write\n",
01371             frame->frametype);
01372       return 0;
01373    }
01374 
01375    return res;
01376 }
01377 
01378 static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
01379 {
01380    struct gtalk_pvt *p = newchan->tech_pvt;
01381    ast_mutex_lock(&p->lock);
01382 
01383    if ((p->owner != oldchan)) {
01384       ast_mutex_unlock(&p->lock);
01385       return -1;
01386    }
01387    if (p->owner == oldchan)
01388       p->owner = newchan;
01389    ast_mutex_unlock(&p->lock);
01390    return 0;
01391 }
01392 
01393 static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen)
01394 {
01395    int res = 0;
01396 
01397    switch (condition) {
01398    case AST_CONTROL_HOLD:
01399       ast_moh_start(ast, data, NULL);
01400       break;
01401    case AST_CONTROL_UNHOLD:
01402       ast_moh_stop(ast);
01403       break;
01404    default:
01405       ast_log(LOG_NOTICE, "Don't know how to indicate condition '%d'\n", condition);
01406       res = -1;
01407    }
01408 
01409    return res;
01410 }
01411 
01412 static int gtalk_digit_begin(struct ast_channel *chan, char digit)
01413 {
01414    return gtalk_digit(chan, digit, 0);
01415 }
01416 
01417 static int gtalk_digit_end(struct ast_channel *chan, char digit, unsigned int duration)
01418 {
01419    return gtalk_digit(chan, digit, duration);
01420 }
01421 
01422 static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration)
01423 {
01424    struct gtalk_pvt *p = ast->tech_pvt;
01425    struct gtalk *client = p->parent;
01426    iks *iq, *gtalk, *dtmf;
01427    char buffer[2] = {digit, '\0'};
01428    iq = iks_new("iq");
01429    gtalk = iks_new("gtalk");
01430    dtmf = iks_new("dtmf");
01431    if(!iq || !gtalk || !dtmf) {
01432       if(iq)
01433          iks_delete(iq);
01434       if(gtalk)
01435          iks_delete(gtalk);
01436       if(dtmf)
01437          iks_delete(dtmf);
01438       ast_log(LOG_ERROR, "Did not send dtmf do to memory issue\n");
01439       return -1;
01440    }
01441 
01442    iks_insert_attrib(iq, "type", "set");
01443    iks_insert_attrib(iq, "to", p->them);
01444    iks_insert_attrib(iq, "from", p->us);
01445    iks_insert_attrib(iq, "id", client->connection->mid);
01446    ast_aji_increment_mid(client->connection->mid);
01447    iks_insert_attrib(gtalk, "xmlns", "http://jabber.org/protocol/gtalk");
01448    iks_insert_attrib(gtalk, "action", "session-info");
01449    iks_insert_attrib(gtalk, "initiator", p->initiator ? p->us: p->them);
01450    iks_insert_attrib(gtalk, "sid", p->sid);
01451    iks_insert_attrib(dtmf, "xmlns", "http://jabber.org/protocol/gtalk/info/dtmf");
01452    iks_insert_attrib(dtmf, "code", buffer);
01453    iks_insert_node(iq, gtalk);
01454    iks_insert_node(gtalk, dtmf);
01455 
01456    ast_mutex_lock(&p->lock);
01457    if (ast->dtmff.frametype == AST_FRAME_DTMF_BEGIN || duration == 0) {
01458       iks_insert_attrib(dtmf, "action", "button-down");
01459    } else if (ast->dtmff.frametype == AST_FRAME_DTMF_END || duration != 0) {
01460       iks_insert_attrib(dtmf, "action", "button-up");
01461    }
01462    iks_send(client->connection->p, iq);
01463    iks_delete(iq);
01464    iks_delete(gtalk);
01465    iks_delete(dtmf);
01466    ast_mutex_unlock(&p->lock);
01467    return 0;
01468 }
01469 
01470 static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen)
01471 {
01472    ast_log(LOG_NOTICE, "XXX Implement gtalk sendhtml XXX\n");
01473 
01474    return -1;
01475 }
01476 
01477 /* Not in use right now.
01478 static int gtalk_auto_congest(void *nothing)
01479 {
01480    struct gtalk_pvt *p = nothing;
01481 
01482    ast_mutex_lock(&p->lock);
01483    if (p->owner) {
01484       if (!ast_channel_trylock(p->owner)) {
01485          ast_log(LOG_NOTICE, "Auto-congesting %s\n", p->owner->name);
01486          ast_queue_control(p->owner, AST_CONTROL_CONGESTION);
01487          ast_channel_unlock(p->owner);
01488       }
01489    }
01490    ast_mutex_unlock(&p->lock);
01491    return 0;
01492 }
01493 */
01494 
01495 /*! \brief Initiate new call, part of PBX interface 
01496  *    dest is the dial string */
01497 static int gtalk_call(struct ast_channel *ast, char *dest, int timeout)
01498 {
01499    struct gtalk_pvt *p = ast->tech_pvt;
01500 
01501    if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
01502       ast_log(LOG_WARNING, "gtalk_call called on %s, neither down nor reserved\n", ast->name);
01503       return -1;
01504    }
01505 
01506    ast_setstate(ast, AST_STATE_RING);
01507    p->jointcapability = p->capability;
01508    if (!p->ringrule) {
01509       ast_copy_string(p->ring, p->parent->connection->mid, sizeof(p->ring));
01510       p->ringrule = iks_filter_add_rule(p->parent->connection->f, gtalk_ringing_ack, p,
01511                      IKS_RULE_ID, p->ring, IKS_RULE_DONE);
01512    } else
01513       ast_log(LOG_WARNING, "Whoa, already have a ring rule!\n");
01514 
01515    gtalk_invite(p, p->them, p->us, p->sid, 1);
01516    gtalk_create_candidates(p->parent, p, p->sid, p->them, p->us);
01517 
01518    return 0;
01519 }
01520 
01521 /*! \brief Hangup a call through the gtalk proxy channel */
01522 static int gtalk_hangup(struct ast_channel *ast)
01523 {
01524    struct gtalk_pvt *p = ast->tech_pvt;
01525    struct gtalk *client;
01526 
01527    ast_mutex_lock(&p->lock);
01528    client = p->parent;
01529    p->owner = NULL;
01530    ast->tech_pvt = NULL;
01531    if (!p->alreadygone)
01532       gtalk_action(client, p, "terminate");
01533    ast_mutex_unlock(&p->lock);
01534 
01535    gtalk_free_pvt(client, p);
01536    ast_module_unref(ast_module_info->self);
01537 
01538    return 0;
01539 }
01540 
01541 /*! \brief Part of PBX interface */
01542 static struct ast_channel *gtalk_request(const char *type, int format, void *data, int *cause)
01543 {
01544    struct gtalk_pvt *p = NULL;
01545    struct gtalk *client = NULL;
01546    char *sender = NULL, *to = NULL, *s = NULL;
01547    struct ast_channel *chan = NULL;
01548 
01549    if (data) {
01550       s = ast_strdupa(data);
01551       if (s) {
01552          sender = strsep(&s, "/");
01553          if (sender && (sender[0] != '\0'))
01554             to = strsep(&s, "/");
01555          if (!to) {
01556             ast_log(LOG_ERROR, "Bad arguments in Gtalk Dialstring: %s\n", (char*) data);
01557             return NULL;
01558          }
01559       }
01560    }
01561    client = find_gtalk(to, sender);
01562    if (!client) {
01563       ast_log(LOG_WARNING, "Could not find recipient.\n");
01564       return NULL;
01565    }
01566    ASTOBJ_WRLOCK(client);
01567    p = gtalk_alloc(client, strchr(sender, '@') ? sender : client->connection->jid->full, strchr(to, '@') ? to : client->user, NULL);
01568    if (p)
01569       chan = gtalk_new(client, p, AST_STATE_DOWN, to);
01570 
01571    ASTOBJ_UNLOCK(client);
01572    return chan;
01573 }
01574 
01575 /*! \brief CLI command "gtalk show channels" */
01576 static int gtalk_show_channels(int fd, int argc, char **argv)
01577 {
01578 #define FORMAT  "%-30.30s  %-30.30s  %-15.15s  %-5.5s %-5.5s \n"
01579    struct gtalk_pvt *p;
01580    struct ast_channel *chan;
01581    int numchans = 0;
01582    char them[AJI_MAX_JIDLEN];
01583    char *jid = NULL;
01584    char *resource = NULL;
01585 
01586    if (argc != 3)
01587       return RESULT_SHOWUSAGE;
01588 
01589    ast_mutex_lock(&gtalklock);
01590    ast_cli(fd, FORMAT, "Channel", "Jabber ID", "Resource", "Read", "Write");
01591    ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
01592       ASTOBJ_WRLOCK(iterator);
01593       p = iterator->p;
01594       while(p) {
01595          chan = p->owner;
01596          ast_copy_string(them, p->them, sizeof(them));
01597          jid = them;
01598          resource = strchr(them, '/');
01599          if (!resource)
01600             resource = "None";
01601          else {
01602             *resource = '\0';
01603             resource ++;
01604          }
01605          if (chan)
01606             ast_cli(fd, FORMAT, 
01607                chan->name,
01608                jid,
01609                resource,
01610                ast_getformatname(chan->readformat),
01611                ast_getformatname(chan->writeformat)               
01612                );
01613          else 
01614             ast_log(LOG_WARNING, "No available channel\n");
01615          numchans ++;
01616          p = p->next;
01617       }
01618       ASTOBJ_UNLOCK(iterator);
01619    });
01620 
01621    ast_mutex_unlock(&gtalklock);
01622 
01623    ast_cli(fd, "%d active gtalk channel%s\n", numchans, (numchans != 1) ? "s" : "");
01624    return RESULT_SUCCESS;
01625 #undef FORMAT
01626 }
01627 
01628 /*! \brief CLI command "gtalk show channels" */
01629 static int gtalk_do_reload(int fd, int argc, char **argv)
01630 {
01631    ast_verbose("IT DOES WORK!\n");
01632    return RESULT_SUCCESS;
01633 }
01634 
01635 static int gtalk_parser(void *data, ikspak *pak)
01636 {
01637    struct gtalk *client = ASTOBJ_REF((struct gtalk *) data);
01638 
01639    if (iks_find_with_attrib(pak->x, "session", "type", "initiate")) {
01640       /* New call */
01641       gtalk_newcall(client, pak);
01642    } else if (iks_find_with_attrib(pak->x, "session", "type", "candidates") || iks_find_with_attrib(pak->x, "session", "type", "transport-info")) {
01643       if (option_debug > 2)
01644          ast_log(LOG_DEBUG, "About to add candidate!\n");
01645       gtalk_add_candidate(client, pak);
01646       if (option_debug > 2)
01647          ast_log(LOG_DEBUG, "Candidate Added!\n");
01648    } else if (iks_find_with_attrib(pak->x, "session", "type", "accept")) {
01649       gtalk_is_answered(client, pak);
01650    } else if (iks_find_with_attrib(pak->x, "session", "type", "transport-accept")) {
01651       gtalk_is_accepted(client, pak);
01652    } else if (iks_find_with_attrib(pak->x, "session", "type", "content-info") || iks_find_with_attrib(pak->x, "gtalk", "action", "session-info")) {
01653       gtalk_handle_dtmf(client, pak);
01654    } else if (iks_find_with_attrib(pak->x, "session", "type", "terminate")) {
01655       gtalk_hangup_farend(client, pak);
01656    } else if (iks_find_with_attrib(pak->x, "session", "type", "reject")) {
01657       gtalk_hangup_farend(client, pak);
01658    }
01659    ASTOBJ_UNREF(client, gtalk_member_destroy);
01660    return IKS_FILTER_EAT;
01661 }
01662 
01663 /* Not using this anymore probably take out soon 
01664 static struct gtalk_candidate *gtalk_create_candidate(char *args)
01665 {
01666    char *name, *type, *preference, *protocol;
01667    struct gtalk_candidate *res;
01668    res = malloc(sizeof(struct gtalk_candidate));
01669    memset(res, 0, sizeof(struct gtalk_candidate));
01670    if (args)
01671       name = args;
01672    if ((args = strchr(args, ','))) {
01673       *args = '\0';
01674       args++;
01675       preference = args;
01676    }
01677    if ((args = strchr(args, ','))) {
01678       *args = '\0';
01679       args++;
01680       protocol = args;
01681    }
01682    if ((args = strchr(args, ','))) {
01683       *args = '\0';
01684       args++;
01685       type = args;
01686    }
01687    if (name)
01688       ast_copy_string(res->name, name, sizeof(res->name));
01689    if (preference) {
01690       res->preference = atof(preference);
01691    }
01692    if (protocol) {
01693       if (!strcasecmp("udp", protocol))
01694          res->protocol = AJI_PROTOCOL_UDP;
01695       if (!strcasecmp("ssltcp", protocol))
01696          res->protocol = AJI_PROTOCOL_SSLTCP;
01697    }
01698    if (type) {
01699       if (!strcasecmp("stun", type))
01700          res->type = AJI_CONNECT_STUN;
01701       if (!strcasecmp("local", type))
01702          res->type = AJI_CONNECT_LOCAL;
01703       if (!strcasecmp("relay", type))
01704          res->type = AJI_CONNECT_RELAY;
01705    }
01706 
01707    return res;
01708 }
01709 */
01710 
01711 static int gtalk_create_member(char *label, struct ast_variable *var, int allowguest,
01712                         struct ast_codec_pref prefs, char *context,
01713                         struct gtalk *member)
01714 {
01715    struct aji_client *client;
01716 
01717    if (!member)
01718       ast_log(LOG_WARNING, "Out of memory.\n");
01719 
01720    ast_copy_string(member->name, label, sizeof(member->name));
01721    ast_copy_string(member->user, label, sizeof(member->user));
01722    ast_copy_string(member->context, context, sizeof(member->context));
01723    member->allowguest = allowguest;
01724    member->prefs = prefs;
01725    while (var) {
01726 #if 0
01727       struct gtalk_candidate *candidate = NULL;
01728 #endif
01729       if (!strcasecmp(var->name, "username"))
01730          ast_copy_string(member->user, var->value, sizeof(member->user));
01731       else if (!strcasecmp(var->name, "disallow"))
01732          ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 0);
01733       else if (!strcasecmp(var->name, "allow"))
01734          ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 1);
01735       else if (!strcasecmp(var->name, "context"))
01736          ast_copy_string(member->context, var->value, sizeof(member->context));
01737 #if 0
01738       else if (!strcasecmp(var->name, "candidate")) {
01739          candidate = gtalk_create_candidate(var->value);
01740          if (candidate) {
01741             candidate->next = member->ourcandidates;
01742             member->ourcandidates = candidate;
01743          }
01744       }
01745 #endif
01746       else if (!strcasecmp(var->name, "connection")) {
01747          if ((client = ast_aji_get_client(var->value))) {
01748             member->connection = client;
01749             iks_filter_add_rule(client->f, gtalk_parser, member, 
01750                       IKS_RULE_TYPE, IKS_PAK_IQ, 
01751                       IKS_RULE_FROM_PARTIAL, member->user,
01752                       IKS_RULE_NS, "http://www.google.com/session",
01753                       IKS_RULE_DONE);
01754 
01755          } else {
01756             ast_log(LOG_ERROR, "connection referenced not found!\n");
01757             return 0;
01758          }
01759       }
01760       var = var->next;
01761    }
01762    if (member->connection && member->user)
01763       member->buddy = ASTOBJ_CONTAINER_FIND(&member->connection->buddies, member->user);
01764    else {
01765       ast_log(LOG_ERROR, "No Connection or Username!\n");
01766    }
01767    return 1;
01768 }
01769 
01770 static int gtalk_load_config(void)
01771 {
01772    char *cat = NULL;
01773    struct ast_config *cfg = NULL;
01774    char context[AST_MAX_CONTEXT];
01775    int allowguest = 1;
01776    struct ast_variable *var;
01777    struct gtalk *member;
01778    struct ast_codec_pref prefs;
01779    struct aji_client_container *clients;
01780    struct gtalk_candidate *global_candidates = NULL;
01781    struct hostent *hp;
01782    struct ast_hostent ahp;
01783 
01784    cfg = ast_config_load(GOOGLE_CONFIG);
01785    if (!cfg)
01786       return 0;
01787 
01788    /* Copy the default jb config over global_jbconf */
01789    memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
01790 
01791    cat = ast_category_browse(cfg, NULL);
01792    for (var = ast_variable_browse(cfg, "general"); var; var = var->next) {
01793       /* handle jb conf */
01794       if (!ast_jb_read_conf(&global_jbconf, var->name, var->value))
01795          continue;
01796 
01797       if (!strcasecmp(var->name, "allowguest"))
01798          allowguest =
01799             (ast_true(ast_variable_retrieve(cfg, "general", "allowguest"))) ? 1 : 0;
01800       else if (!strcasecmp(var->name, "disallow"))
01801          ast_parse_allow_disallow(&prefs, &global_capability, var->value, 0);
01802       else if (!strcasecmp(var->name, "allow"))
01803          ast_parse_allow_disallow(&prefs, &global_capability, var->value, 1);
01804       else if (!strcasecmp(var->name, "context"))
01805          ast_copy_string(context, var->value, sizeof(context));
01806       else if (!strcasecmp(var->name, "bindaddr")) {
01807          if (!(hp = ast_gethostbyname(var->value, &ahp))) {
01808             ast_log(LOG_WARNING, "Invalid address: %s\n", var->value);
01809          } else {
01810             memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
01811          }
01812       }
01813 /*  Idea to allow for custom candidates  */
01814 /*
01815       else if (!strcasecmp(var->name, "candidate")) {
01816          candidate = gtalk_create_candidate(var->value);
01817          if (candidate) {
01818             candidate->next = global_candidates;
01819             global_candidates = candidate;
01820          }
01821       }
01822 */
01823    }
01824    while (cat) {
01825       if (strcasecmp(cat, "general")) {
01826          var = ast_variable_browse(cfg, cat);
01827          member = (struct gtalk *) malloc(sizeof(struct gtalk));
01828          memset(member, 0, sizeof(struct gtalk));
01829          ASTOBJ_INIT(member);
01830          ASTOBJ_WRLOCK(member);
01831          if (!strcasecmp(cat, "guest")) {
01832             ast_copy_string(member->name, "guest", sizeof(member->name));
01833             ast_copy_string(member->user, "guest", sizeof(member->user));
01834             ast_copy_string(member->context, context, sizeof(member->context));
01835             member->allowguest = allowguest;
01836             member->prefs = prefs;
01837             while (var) {
01838                if (!strcasecmp(var->name, "disallow"))
01839                   ast_parse_allow_disallow(&member->prefs, &member->capability,
01840                                      var->value, 0);
01841                else if (!strcasecmp(var->name, "allow"))
01842                   ast_parse_allow_disallow(&member->prefs, &member->capability,
01843                                      var->value, 1);
01844                else if (!strcasecmp(var->name, "context"))
01845                   ast_copy_string(member->context, var->value,
01846                               sizeof(member->context));
01847 /*  Idea to allow for custom candidates  */
01848 /*
01849                else if (!strcasecmp(var->name, "candidate")) {
01850                   candidate = gtalk_create_candidate(var->value);
01851                   if (candidate) {
01852                      candidate->next = member->ourcandidates;
01853                      member->ourcandidates = candidate;
01854                   }
01855                }
01856 */
01857                var = var->next;
01858             }
01859             ASTOBJ_UNLOCK(member);
01860             clients = ast_aji_get_clients();
01861             if (clients) {
01862                ASTOBJ_CONTAINER_TRAVERSE(clients, 1, {
01863                   ASTOBJ_WRLOCK(iterator);
01864                   ASTOBJ_WRLOCK(member);
01865                   member->connection = iterator;
01866                   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);
01867                   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);
01868                   ASTOBJ_UNLOCK(member);
01869                   ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
01870                   ASTOBJ_UNLOCK(iterator);
01871                });
01872             } else {
01873                ASTOBJ_UNLOCK(member);
01874                ASTOBJ_UNREF(member, gtalk_member_destroy);
01875             }
01876          } else {
01877             ASTOBJ_UNLOCK(member);
01878             if (gtalk_create_member(cat, var, allowguest, prefs, context, member))
01879                ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
01880             ASTOBJ_UNREF(member, gtalk_member_destroy);
01881          }
01882       }
01883       cat = ast_category_browse(cfg, cat);
01884    }
01885    gtalk_free_candidates(global_candidates);
01886    return 1;
01887 }
01888 
01889 /*! \brief Load module into PBX, register channel */
01890 static int load_module(void)
01891 {
01892 #ifdef HAVE_GNUTLS   
01893         gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
01894 #endif /* HAVE_GNUTLS */
01895 
01896    ASTOBJ_CONTAINER_INIT(&gtalk_list);
01897    if (!gtalk_load_config()) {
01898       ast_log(LOG_ERROR, "Unable to read config file %s. Not loading module.\n", GOOGLE_CONFIG);
01899       return 0;
01900    }
01901 
01902    sched = sched_context_create();
01903    if (!sched) 
01904       ast_log(LOG_WARNING, "Unable to create schedule context\n");
01905 
01906    io = io_context_create();
01907    if (!io) 
01908       ast_log(LOG_WARNING, "Unable to create I/O context\n");
01909 
01910    if (ast_find_ourip(&__ourip, bindaddr)) {
01911       ast_log(LOG_WARNING, "Unable to get own IP address, Gtalk disabled\n");
01912       return 0;
01913    }
01914 
01915    ast_rtp_proto_register(&gtalk_rtp);
01916    ast_cli_register_multiple(gtalk_cli, sizeof(gtalk_cli) / sizeof(gtalk_cli[0]));
01917 
01918    /* Make sure we can register our channel type */
01919    if (ast_channel_register(&gtalk_tech)) {
01920       ast_log(LOG_ERROR, "Unable to register channel class %s\n", gtalk_tech.type);
01921       return -1;
01922    }
01923    return 0;
01924 }
01925 
01926 /*! \brief Reload module */
01927 static int reload(void)
01928 {
01929    return 0;
01930 }
01931 
01932 /*! \brief Unload the gtalk channel from Asterisk */
01933 static int unload_module(void)
01934 {
01935    struct gtalk_pvt *privates = NULL;
01936    ast_cli_unregister_multiple(gtalk_cli, sizeof(gtalk_cli) / sizeof(gtalk_cli[0]));
01937    /* First, take us out of the channel loop */
01938    ast_channel_unregister(&gtalk_tech);
01939    ast_rtp_proto_unregister(&gtalk_rtp);
01940 
01941    if (!ast_mutex_lock(&gtalklock)) {
01942       /* Hangup all interfaces if they have an owner */
01943       ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
01944          ASTOBJ_WRLOCK(iterator);
01945          privates = iterator->p;
01946          while(privates) {
01947             if (privates->owner)
01948                ast_softhangup(privates->owner, AST_SOFTHANGUP_APPUNLOAD);
01949             privates = privates->next;
01950          }
01951          iterator->p = NULL;
01952          ASTOBJ_UNLOCK(iterator);
01953       });
01954       ast_mutex_unlock(&gtalklock);
01955    } else {
01956       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01957       return -1;
01958    }
01959    ASTOBJ_CONTAINER_DESTROYALL(&gtalk_list, gtalk_member_destroy);
01960    ASTOBJ_CONTAINER_DESTROY(&gtalk_list);
01961    return 0;
01962 }
01963 
01964 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Gtalk Channel Driver",
01965       .load = load_module,
01966       .unload = unload_module,
01967       .reload = reload,
01968           );

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