Sat Mar 10 01:54:08 2012

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  * Philippe Sultan <philippe.sultan@gmail.com>
00008  *
00009  * See http://www.asterisk.org for more information about
00010  * the Asterisk project. Please do not directly contact
00011  * any of the maintainers of this project for assistance;
00012  * the project provides a web site, mailing lists and IRC
00013  * channels for your use.
00014  *
00015  * This program is free software, distributed under the terms of
00016  * the GNU General Public License Version 2. See the LICENSE file
00017  * at the top of the source tree.
00018  */
00019 
00020 /*! \file
00021  *
00022  * \author Matt O'Gorman <mogorman@digium.com>
00023  * \author Philippe Sultan <philippe.sultan@gmail.com>
00024  *
00025  * \brief Gtalk Channel Driver, until google/libjingle works with jingle spec
00026  *
00027  * \ingroup channel_drivers
00028  *
00029  * ********** General TODO:s
00030  * \todo Support config reloading.
00031  * \todo Fix native bridging.
00032  */
00033 
00034 /*** MODULEINFO
00035    <depend>iksemel</depend>
00036    <depend>res_jabber</depend>
00037    <use>openssl</use>
00038    <support_level>extended</support_level>
00039  ***/
00040 
00041 
00042 #include "asterisk.h"
00043 
00044 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 346086 $")
00045 
00046 #include <sys/socket.h>
00047 #include <fcntl.h>
00048 #include <netdb.h>
00049 #include <netinet/in.h>
00050 #include <arpa/inet.h>
00051 #include <sys/signal.h>
00052 #include <iksemel.h>
00053 #include <pthread.h>
00054 #include <ctype.h>
00055 
00056 #include "asterisk/lock.h"
00057 #include "asterisk/channel.h"
00058 #include "asterisk/config.h"
00059 #include "asterisk/module.h"
00060 #include "asterisk/pbx.h"
00061 #include "asterisk/sched.h"
00062 #include "asterisk/io.h"
00063 #include "asterisk/rtp_engine.h"
00064 #include "asterisk/stun.h"
00065 #include "asterisk/acl.h"
00066 #include "asterisk/callerid.h"
00067 #include "asterisk/file.h"
00068 #include "asterisk/cli.h"
00069 #include "asterisk/app.h"
00070 #include "asterisk/musiconhold.h"
00071 #include "asterisk/manager.h"
00072 #include "asterisk/stringfields.h"
00073 #include "asterisk/utils.h"
00074 #include "asterisk/causes.h"
00075 #include "asterisk/astobj.h"
00076 #include "asterisk/abstract_jb.h"
00077 #include "asterisk/jabber.h"
00078 #include "asterisk/jingle.h"
00079 
00080 #define GOOGLE_CONFIG "gtalk.conf"
00081 
00082 /*! Global jitterbuffer configuration - by default, jb is disabled */
00083 static struct ast_jb_conf default_jbconf =
00084 {
00085    .flags = 0,
00086    .max_size = -1,
00087    .resync_threshold = -1,
00088    .impl = "",
00089    .target_extra = -1,
00090 };
00091 static struct ast_jb_conf global_jbconf;
00092 
00093 enum gtalk_protocol {
00094    AJI_PROTOCOL_UDP = 1,
00095    AJI_PROTOCOL_SSLTCP = 2,
00096 };
00097 
00098 enum gtalk_connect_type {
00099    AJI_CONNECT_STUN = 1,
00100    AJI_CONNECT_LOCAL = 2,
00101    AJI_CONNECT_RELAY = 3,
00102 };
00103 
00104 struct gtalk_pvt {
00105    ast_mutex_t lock;                /*!< Channel private lock */
00106    time_t laststun;
00107    struct gtalk *parent;            /*!< Parent client */
00108    char sid[100];
00109    char us[AJI_MAX_JIDLEN];
00110    char them[AJI_MAX_JIDLEN];
00111    char ring[10];                   /*!< Message ID of ring */
00112    iksrule *ringrule;               /*!< Rule for matching RING request */
00113    int initiator;                   /*!< If we're the initiator */
00114    int alreadygone;
00115    int capability;
00116    struct ast_codec_pref prefs;
00117    struct gtalk_candidate *theircandidates;
00118    struct gtalk_candidate *ourcandidates;
00119    char cid_num[80];                /*!< Caller ID num */
00120    char cid_name[80];               /*!< Caller ID name */
00121    char exten[80];                  /*!< Called extension */
00122    struct ast_channel *owner;       /*!< Master Channel */
00123    struct ast_rtp_instance *rtp;             /*!< RTP audio session */
00124    struct ast_rtp_instance *vrtp;            /*!< RTP video session */
00125    format_t jointcapability;             /*!< Supported capability at both ends (codecs ) */
00126    format_t peercapability;
00127    struct gtalk_pvt *next; /* Next entity */
00128 };
00129 
00130 struct gtalk_candidate {
00131    char name[100];
00132    enum gtalk_protocol protocol;
00133    double preference;
00134    char username[100];
00135    char password[100];
00136    enum gtalk_connect_type type;
00137    char network[6];
00138    int generation;
00139    char ip[16];
00140    int port;
00141    int receipt;
00142    struct gtalk_candidate *next;
00143 };
00144 
00145 struct gtalk {
00146    ASTOBJ_COMPONENTS(struct gtalk);
00147    struct aji_client *connection;
00148    struct aji_buddy *buddy;
00149    struct gtalk_pvt *p;
00150    struct ast_codec_pref prefs;
00151    int amaflags;        /*!< AMA Flags */
00152    char user[AJI_MAX_JIDLEN];
00153    char context[AST_MAX_CONTEXT];
00154    char parkinglot[AST_MAX_CONTEXT];   /*!<  Parkinglot */
00155    char accountcode[AST_MAX_ACCOUNT_CODE];   /*!< Account code */
00156    format_t capability;
00157    ast_group_t callgroup;  /*!< Call group */
00158    ast_group_t pickupgroup;   /*!< Pickup group */
00159    int callingpres;     /*!< Calling presentation */
00160    int allowguest;
00161    char language[MAX_LANGUAGE];  /*!<  Default language for prompts */
00162    char musicclass[MAX_MUSICCLASS]; /*!<  Music on Hold class */
00163 };
00164 
00165 struct gtalk_container {
00166    ASTOBJ_CONTAINER_COMPONENTS(struct gtalk);
00167 };
00168 
00169 static const char desc[] = "Gtalk Channel";
00170 
00171 static format_t global_capability = AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_GSM | AST_FORMAT_H263;
00172 
00173 AST_MUTEX_DEFINE_STATIC(gtalklock); /*!< Protect the interface list (of gtalk_pvt's) */
00174 
00175 /* Forward declarations */
00176 static struct ast_channel *gtalk_request(const char *type, format_t format, const struct ast_channel *requestor, void *data, int *cause);
00177 /*static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration);*/
00178 static int gtalk_sendtext(struct ast_channel *ast, const char *text);
00179 static int gtalk_digit_begin(struct ast_channel *ast, char digit);
00180 static int gtalk_digit_end(struct ast_channel *ast, char digit, unsigned int duration);
00181 static int gtalk_call(struct ast_channel *ast, char *dest, int timeout);
00182 static int gtalk_hangup(struct ast_channel *ast);
00183 static int gtalk_answer(struct ast_channel *ast);
00184 static int gtalk_action(struct gtalk *client, struct gtalk_pvt *p, const char *action);
00185 static void gtalk_free_pvt(struct gtalk *client, struct gtalk_pvt *p);
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_update_stun(struct gtalk *client, struct gtalk_pvt *p);
00194 /* static char *gtalk_do_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a); */
00195 static char *gtalk_show_channels(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
00196 static int gtalk_update_externip(void);
00197 static int gtalk_parser(void *data, ikspak *pak);
00198 static int gtalk_create_candidates(struct gtalk *client, struct gtalk_pvt *p, char *sid, char *from, char *to);
00199 
00200 /*! \brief PBX interface structure for channel registration */
00201 static const struct ast_channel_tech gtalk_tech = {
00202    .type = "Gtalk",
00203    .description = "Gtalk Channel Driver",
00204    .capabilities = AST_FORMAT_AUDIO_MASK,
00205    .requester = gtalk_request,
00206    .send_text = gtalk_sendtext,
00207    .send_digit_begin = gtalk_digit_begin,
00208    .send_digit_end = gtalk_digit_end,
00209    /* XXX TODO native bridging is causing odd problems with DTMF pass-through with
00210     * the gtalk servers. Enable native bridging once the source of this problem has
00211     * been identified.
00212    .bridge = ast_rtp_instance_bridge, */
00213    .call = gtalk_call,
00214    .hangup = gtalk_hangup,
00215    .answer = gtalk_answer,
00216    .read = gtalk_read,
00217    .write = gtalk_write,
00218    .exception = gtalk_read,
00219    .indicate = gtalk_indicate,
00220    .fixup = gtalk_fixup,
00221    .send_html = gtalk_sendhtml,
00222    .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER
00223 };
00224 
00225 static struct sockaddr_in bindaddr = { 0, }; /*!< The address we bind to */
00226 
00227 static struct sched_context *sched; /*!< The scheduling context */
00228 static struct io_context *io; /*!< The IO context */
00229 static struct in_addr __ourip;
00230 
00231 static struct ast_cli_entry gtalk_cli[] = {
00232 /* AST_CLI_DEFINE(gtalk_do_reload, "Reload GoogleTalk configuration"), XXX TODO reloads are not possible yet. */
00233    AST_CLI_DEFINE(gtalk_show_channels, "Show GoogleTalk channels"),
00234 };
00235 
00236 static char externip[16];
00237 static struct sockaddr_in stunaddr; /*!< the stun server we get the externip from */
00238 
00239 static struct gtalk_container gtalk_list;
00240 
00241 static void gtalk_member_destroy(struct gtalk *obj)
00242 {
00243    ast_free(obj);
00244 }
00245 
00246 static struct gtalk *find_gtalk(char *name, char *connection)
00247 {
00248    struct gtalk *gtalk = NULL;
00249    char *domain = NULL , *s = NULL;
00250 
00251    if (strchr(connection, '@')) {
00252       s = ast_strdupa(connection);
00253       domain = strsep(&s, "@");
00254       ast_verbose("OOOOH domain = %s\n", domain);
00255    }
00256    gtalk = ASTOBJ_CONTAINER_FIND(&gtalk_list, name);
00257    if (!gtalk && strchr(name, '@'))
00258       gtalk = ASTOBJ_CONTAINER_FIND_FULL(&gtalk_list, name, user,,, strcasecmp);
00259 
00260    if (!gtalk) {
00261       /* guest call */
00262       ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
00263          ASTOBJ_RDLOCK(iterator);
00264          if (!strcasecmp(iterator->name, "guest")) {
00265             gtalk = iterator;
00266          }
00267          ASTOBJ_UNLOCK(iterator);
00268 
00269          if (gtalk)
00270             break;
00271       });
00272 
00273    }
00274    return gtalk;
00275 }
00276 
00277 
00278 static int add_codec_to_answer(const struct gtalk_pvt *p, int codec, iks *dcodecs)
00279 {
00280    int res = 0;
00281    char *format = ast_getformatname(codec);
00282 
00283    if (!strcasecmp("ulaw", format)) {
00284       iks *payload_eg711u, *payload_pcmu;
00285       payload_pcmu = iks_new("payload-type");
00286       payload_eg711u = iks_new("payload-type");
00287 
00288       if(!payload_eg711u || !payload_pcmu) {
00289          iks_delete(payload_pcmu);
00290          iks_delete(payload_eg711u);
00291          ast_log(LOG_WARNING,"Failed to allocate iks node");
00292          return -1;
00293       }
00294       iks_insert_attrib(payload_pcmu, "id", "0");
00295       iks_insert_attrib(payload_pcmu, "name", "PCMU");
00296       iks_insert_attrib(payload_pcmu, "clockrate","8000");
00297       iks_insert_attrib(payload_pcmu, "bitrate","64000");
00298       iks_insert_attrib(payload_eg711u, "id", "100");
00299       iks_insert_attrib(payload_eg711u, "name", "EG711U");
00300       iks_insert_attrib(payload_eg711u, "clockrate","8000");
00301       iks_insert_attrib(payload_eg711u, "bitrate","64000");
00302       iks_insert_node(dcodecs, payload_pcmu);
00303       iks_insert_node(dcodecs, payload_eg711u);
00304       res ++;
00305    }
00306    if (!strcasecmp("alaw", format)) {
00307       iks *payload_eg711a, *payload_pcma;
00308       payload_pcma = iks_new("payload-type");
00309       payload_eg711a = iks_new("payload-type");
00310       if(!payload_eg711a || !payload_pcma) {
00311          iks_delete(payload_eg711a);
00312          iks_delete(payload_pcma);
00313          ast_log(LOG_WARNING,"Failed to allocate iks node");
00314          return -1;
00315       }
00316       iks_insert_attrib(payload_pcma, "id", "8");
00317       iks_insert_attrib(payload_pcma, "name", "PCMA");
00318       iks_insert_attrib(payload_pcma, "clockrate","8000");
00319       iks_insert_attrib(payload_pcma, "bitrate","64000");
00320       payload_eg711a = iks_new("payload-type");
00321       iks_insert_attrib(payload_eg711a, "id", "101");
00322       iks_insert_attrib(payload_eg711a, "name", "EG711A");
00323       iks_insert_attrib(payload_eg711a, "clockrate","8000");
00324       iks_insert_attrib(payload_eg711a, "bitrate","64000");
00325       iks_insert_node(dcodecs, payload_pcma);
00326       iks_insert_node(dcodecs, payload_eg711a);
00327       res ++;
00328    }
00329    if (!strcasecmp("ilbc", format)) {
00330       iks *payload_ilbc = iks_new("payload-type");
00331       if(!payload_ilbc) {
00332          ast_log(LOG_WARNING,"Failed to allocate iks node");
00333          return -1;
00334       }
00335       iks_insert_attrib(payload_ilbc, "id", "97");
00336       iks_insert_attrib(payload_ilbc, "name", "iLBC");
00337       iks_insert_attrib(payload_ilbc, "clockrate","8000");
00338       iks_insert_attrib(payload_ilbc, "bitrate","13300");
00339       iks_insert_node(dcodecs, payload_ilbc);
00340       res ++;
00341    }
00342    if (!strcasecmp("g723", format)) {
00343       iks *payload_g723 = iks_new("payload-type");
00344       if(!payload_g723) {
00345          ast_log(LOG_WARNING,"Failed to allocate iks node");
00346          return -1;
00347       }
00348       iks_insert_attrib(payload_g723, "id", "4");
00349       iks_insert_attrib(payload_g723, "name", "G723");
00350       iks_insert_attrib(payload_g723, "clockrate","8000");
00351       iks_insert_attrib(payload_g723, "bitrate","6300");
00352       iks_insert_node(dcodecs, payload_g723);
00353       res ++;
00354    }
00355    if (!strcasecmp("speex", format)) {
00356       iks *payload_speex = iks_new("payload-type");
00357       if(!payload_speex) {
00358          ast_log(LOG_WARNING,"Failed to allocate iks node");
00359          return -1;
00360       }
00361       iks_insert_attrib(payload_speex, "id", "110");
00362       iks_insert_attrib(payload_speex, "name", "speex");
00363       iks_insert_attrib(payload_speex, "clockrate","8000");
00364       iks_insert_attrib(payload_speex, "bitrate","11000");
00365       iks_insert_node(dcodecs, payload_speex);
00366       res++;
00367    }
00368    if (!strcasecmp("gsm", format)) {
00369       iks *payload_gsm = iks_new("payload-type");
00370       if(!payload_gsm) {
00371          ast_log(LOG_WARNING,"Failed to allocate iks node");
00372          return -1;
00373       }
00374       iks_insert_attrib(payload_gsm, "id", "103");
00375       iks_insert_attrib(payload_gsm, "name", "gsm");
00376       iks_insert_node(dcodecs, payload_gsm);
00377       res++;
00378    }
00379 
00380    return res;
00381 }
00382 
00383 static int gtalk_invite(struct gtalk_pvt *p, char *to, char *from, char *sid, int initiator)
00384 {
00385    struct gtalk *client = p->parent;
00386    iks *iq, *gtalk, *dcodecs, *payload_telephone, *transport;
00387    int x;
00388    int pref_codec = 0;
00389    int alreadysent = 0;
00390    int codecs_num = 0;
00391    char *lowerto = NULL;
00392 
00393    iq = iks_new("iq");
00394    gtalk = iks_new("session");
00395    dcodecs = iks_new("description");
00396    transport = iks_new("transport");
00397    payload_telephone = iks_new("payload-type");
00398    if (!(iq && gtalk && dcodecs && transport && payload_telephone)){
00399       iks_delete(iq);
00400       iks_delete(gtalk);
00401       iks_delete(dcodecs);
00402       iks_delete(transport);
00403       iks_delete(payload_telephone);
00404 
00405       ast_log(LOG_ERROR, "Could not allocate iksemel nodes\n");
00406       return 0;
00407    }
00408    iks_insert_attrib(dcodecs, "xmlns", GOOGLE_AUDIO_NS);
00409    iks_insert_attrib(dcodecs, "xml:lang", "en");
00410 
00411    for (x = 0; x < 64; x++) {
00412       if (!(pref_codec = ast_codec_pref_index(&client->prefs, x)))
00413          break;
00414       if (!(client->capability & pref_codec))
00415          continue;
00416       if (alreadysent & pref_codec)
00417          continue;
00418       codecs_num = add_codec_to_answer(p, pref_codec, dcodecs);
00419       alreadysent |= pref_codec;
00420    }
00421 
00422    if (codecs_num) {
00423       /* only propose DTMF within an audio session */
00424       iks_insert_attrib(payload_telephone, "id", "101");
00425       iks_insert_attrib(payload_telephone, "name", "telephone-event");
00426       iks_insert_attrib(payload_telephone, "clockrate", "8000");
00427    }
00428    iks_insert_attrib(transport,"xmlns",GOOGLE_TRANSPORT_NS);
00429 
00430    iks_insert_attrib(iq, "type", "set");
00431    iks_insert_attrib(iq, "to", to);
00432    iks_insert_attrib(iq, "from", from);
00433    iks_insert_attrib(iq, "id", client->connection->mid);
00434    ast_aji_increment_mid(client->connection->mid);
00435 
00436    iks_insert_attrib(gtalk, "xmlns", GOOGLE_NS);
00437    iks_insert_attrib(gtalk, "type",initiator ? "initiate": "accept");
00438    /* put the initiator attribute to lower case if we receive the call
00439     * otherwise GoogleTalk won't establish the session */
00440    if (!initiator) {
00441            char c;
00442            char *t = lowerto = ast_strdupa(to);
00443       while (((c = *t) != '/') && (*t++ = tolower(c)));
00444    }
00445    iks_insert_attrib(gtalk, "initiator", initiator ? from : lowerto);
00446    iks_insert_attrib(gtalk, "id", sid);
00447    iks_insert_node(iq, gtalk);
00448    iks_insert_node(gtalk, dcodecs);
00449    iks_insert_node(dcodecs, payload_telephone);
00450 
00451    ast_aji_send(client->connection, iq);
00452 
00453    iks_delete(payload_telephone);
00454    iks_delete(transport);
00455    iks_delete(dcodecs);
00456    iks_delete(gtalk);
00457    iks_delete(iq);
00458    return 1;
00459 }
00460 
00461 static int gtalk_ringing_ack(void *data, ikspak *pak)
00462 {
00463    struct gtalk_pvt *p = data;
00464    struct ast_channel *owner;
00465 
00466    ast_mutex_lock(&p->lock);
00467 
00468    if (p->ringrule) {
00469       iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
00470    }
00471    p->ringrule = NULL;
00472 
00473    /* this may be a redirect */
00474    if (!strcmp(S_OR(iks_find_attrib(pak->x, "type"), ""), "error")) {
00475       char *name = NULL;
00476       char *redirect = NULL;
00477       iks *traversenodes = NULL;
00478       traversenodes = pak->query;
00479       while (traversenodes) {
00480          if (!(name = iks_name(traversenodes))) {
00481             break;
00482          }
00483          if (!strcasecmp(name, "error") &&
00484             ((redirect = iks_find_cdata(traversenodes, "redirect")) ||
00485               (redirect = iks_find_cdata(traversenodes, "sta:redirect"))) &&
00486             (redirect = strstr(redirect, "xmpp:"))) {
00487             redirect += 5;
00488             ast_log(LOG_DEBUG, "redirect %s\n", redirect);
00489             ast_copy_string(p->them, redirect, sizeof(p->them));
00490 
00491             gtalk_invite(p, p->them, p->us, p->sid, 1);
00492             break;
00493          }
00494          traversenodes = iks_next_tag(traversenodes);
00495       }
00496    }
00497    gtalk_create_candidates(p->parent, p, p->sid, p->them, p->us);
00498    owner = p->owner;
00499    ast_mutex_unlock(&p->lock);
00500 
00501    if (owner) {
00502       ast_queue_control(owner, AST_CONTROL_RINGING);
00503    }
00504 
00505    return IKS_FILTER_EAT;
00506 }
00507 
00508 static int gtalk_answer(struct ast_channel *ast)
00509 {
00510    struct gtalk_pvt *p = ast->tech_pvt;
00511    int res = 0;
00512 
00513    ast_debug(1, "Answer!\n");
00514    ast_mutex_lock(&p->lock);
00515    gtalk_invite(p, p->them, p->us,p->sid, 0);
00516    manager_event(EVENT_FLAG_SYSTEM, "ChannelUpdate", "Channel: %s\r\nChanneltype: %s\r\nGtalk-SID: %s\r\n",
00517       ast->name, "GTALK", p->sid);
00518    ast_mutex_unlock(&p->lock);
00519    return res;
00520 }
00521 
00522 static enum ast_rtp_glue_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp_instance **instance)
00523 {
00524    struct gtalk_pvt *p = chan->tech_pvt;
00525    enum ast_rtp_glue_result res = AST_RTP_GLUE_RESULT_FORBID;
00526 
00527    if (!p)
00528       return res;
00529 
00530    ast_mutex_lock(&p->lock);
00531    if (p->rtp){
00532       ao2_ref(p->rtp, +1);
00533       *instance = p->rtp;
00534       res = AST_RTP_GLUE_RESULT_LOCAL;
00535    }
00536    ast_mutex_unlock(&p->lock);
00537 
00538    return res;
00539 }
00540 
00541 static format_t gtalk_get_codec(struct ast_channel *chan)
00542 {
00543    struct gtalk_pvt *p = chan->tech_pvt;
00544    return p->peercapability;
00545 }
00546 
00547 static int gtalk_set_rtp_peer(struct ast_channel *chan, struct ast_rtp_instance *rtp, struct ast_rtp_instance *vrtp, struct ast_rtp_instance *trtp, format_t codecs, int nat_active)
00548 {
00549    struct gtalk_pvt *p;
00550 
00551    p = chan->tech_pvt;
00552    if (!p)
00553       return -1;
00554    ast_mutex_lock(&p->lock);
00555 
00556 /* if (rtp)
00557       ast_rtp_get_peer(rtp, &p->redirip);
00558    else
00559       memset(&p->redirip, 0, sizeof(p->redirip));
00560    p->redircodecs = codecs; */
00561 
00562    /* Reset lastrtprx timer */
00563    ast_mutex_unlock(&p->lock);
00564    return 0;
00565 }
00566 
00567 static struct ast_rtp_glue gtalk_rtp_glue = {
00568    .type = "Gtalk",
00569    .get_rtp_info = gtalk_get_rtp_peer,
00570    .get_codec = gtalk_get_codec,
00571    .update_peer = gtalk_set_rtp_peer,
00572 };
00573 
00574 static int gtalk_response(struct gtalk *client, char *from, ikspak *pak, const char *reasonstr, const char *reasonstr2)
00575 {
00576    iks *response = NULL, *error = NULL, *reason = NULL;
00577    int res = -1;
00578 
00579    response = iks_new("iq");
00580    if (response) {
00581       iks_insert_attrib(response, "type", "result");
00582       iks_insert_attrib(response, "from", from);
00583       iks_insert_attrib(response, "to", S_OR(iks_find_attrib(pak->x, "from"), ""));
00584       iks_insert_attrib(response, "id", S_OR(iks_find_attrib(pak->x, "id"), ""));
00585       if (reasonstr) {
00586          error = iks_new("error");
00587          if (error) {
00588             iks_insert_attrib(error, "type", "cancel");
00589             reason = iks_new(reasonstr);
00590             if (reason)
00591                iks_insert_node(error, reason);
00592             iks_insert_node(response, error);
00593          }
00594       }
00595       ast_aji_send(client->connection, response);
00596       res = 0;
00597    }
00598 
00599    iks_delete(reason);
00600    iks_delete(error);
00601    iks_delete(response);
00602 
00603    return res;
00604 }
00605 
00606 static int gtalk_is_answered(struct gtalk *client, ikspak *pak)
00607 {
00608    struct gtalk_pvt *tmp = NULL;
00609    char *from;
00610    iks *codec;
00611    char s1[BUFSIZ], s2[BUFSIZ], s3[BUFSIZ];
00612    int peernoncodeccapability;
00613 
00614    ast_log(LOG_DEBUG, "The client is %s\n", client->name);
00615 
00616    /* Make sure our new call does exist */
00617    for (tmp = client->p; tmp; tmp = tmp->next) {
00618       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
00619          break;
00620       } else if (iks_find_with_attrib(pak->x, "ses:session", "id", tmp->sid)) {
00621          break;
00622       }
00623    }
00624 
00625    if (!tmp) {
00626       ast_log(LOG_WARNING, "Could not find session in iq\n");
00627       return -1;
00628    }
00629 
00630    /* codec points to the first <payload-type/> tag */
00631    codec = iks_first_tag(iks_first_tag(iks_first_tag(pak->x)));
00632    while (codec) {
00633       char *codec_id = iks_find_attrib(codec, "id");
00634       char *codec_name = iks_find_attrib(codec, "name");
00635       if (!codec_id || !codec_name) {
00636          codec = iks_next_tag(codec);
00637          continue;
00638       }
00639 
00640       ast_rtp_codecs_payloads_set_m_type(
00641          ast_rtp_instance_get_codecs(tmp->rtp),
00642          tmp->rtp,
00643          atoi(codec_id));
00644       ast_rtp_codecs_payloads_set_rtpmap_type(
00645          ast_rtp_instance_get_codecs(tmp->rtp),
00646          tmp->rtp,
00647          atoi(codec_id),
00648          "audio",
00649          codec_name,
00650          0);
00651       codec = iks_next_tag(codec);
00652    }
00653 
00654    /* Now gather all of the codecs that we are asked for */
00655    ast_rtp_codecs_payload_formats(ast_rtp_instance_get_codecs(tmp->rtp), &tmp->peercapability, &peernoncodeccapability);
00656 
00657    /* at this point, we received an awser from the remote Gtalk client,
00658       which allows us to compare capabilities */
00659    tmp->jointcapability = tmp->capability & tmp->peercapability;
00660    if (!tmp->jointcapability) {
00661       ast_log(LOG_WARNING, "Capabilities don't match : us - %s, peer - %s, combined - %s \n", ast_getformatname_multiple(s1, BUFSIZ, tmp->capability),
00662          ast_getformatname_multiple(s2, BUFSIZ, tmp->peercapability),
00663          ast_getformatname_multiple(s3, BUFSIZ, tmp->jointcapability));
00664       /* close session if capabilities don't match */
00665       ast_queue_hangup(tmp->owner);
00666 
00667       return -1;
00668 
00669    }
00670 
00671    from = iks_find_attrib(pak->x, "to");
00672    if (!from) {
00673       from = client->connection->jid->full;
00674    }
00675 
00676    if (tmp->owner) {
00677       ast_queue_control(tmp->owner, AST_CONTROL_ANSWER);
00678    }
00679    gtalk_update_stun(tmp->parent, tmp);
00680    gtalk_response(client, from, pak, NULL, NULL);
00681    return 1;
00682 }
00683 
00684 static int gtalk_is_accepted(struct gtalk *client, ikspak *pak)
00685 {
00686    struct gtalk_pvt *tmp;
00687    char *from;
00688 
00689    ast_log(LOG_DEBUG, "The client is %s\n", client->name);
00690    /* find corresponding call */
00691    for (tmp = client->p; tmp; tmp = tmp->next) {
00692       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
00693          break;
00694       }
00695    }
00696 
00697    from = iks_find_attrib(pak->x, "to");
00698    if (!from) {
00699       from = client->connection->jid->full;
00700    }
00701 
00702    if (tmp) {
00703       gtalk_update_stun(tmp->parent, tmp);
00704    } else {
00705       ast_log(LOG_NOTICE, "Whoa, didn't find call during accept?!\n");
00706    }
00707 
00708    /* answer 'iq' packet to let the remote peer know that we're alive */
00709    gtalk_response(client, from, pak, NULL, NULL);
00710    return 1;
00711 }
00712 
00713 static int gtalk_handle_dtmf(struct gtalk *client, ikspak *pak)
00714 {
00715    struct gtalk_pvt *tmp;
00716    iks *dtmfnode = NULL, *dtmfchild = NULL;
00717    char *dtmf;
00718    char *from;
00719    /* Make sure our new call doesn't exist yet */
00720    for (tmp = client->p; tmp; tmp = tmp->next) {
00721       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) || iks_find_with_attrib(pak->x, "gtalk", "sid", tmp->sid))
00722          break;
00723    }
00724    from = iks_find_attrib(pak->x, "to");
00725    if (!from) {
00726       from = client->connection->jid->full;
00727    }
00728 
00729    if (tmp) {
00730       if(iks_find_with_attrib(pak->x, "dtmf-method", "method", "rtp")) {
00731          gtalk_response(client, from, pak,
00732                "feature-not-implemented xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'",
00733                "unsupported-dtmf-method xmlns='http://jabber.org/protocol/gtalk/info/dtmf#errors'");
00734          return -1;
00735       }
00736       if ((dtmfnode = iks_find(pak->x, "dtmf"))) {
00737          if((dtmf = iks_find_attrib(dtmfnode, "code"))) {
00738             if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-up")) {
00739                struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
00740                f.subclass.integer = dtmf[0];
00741                ast_queue_frame(tmp->owner, &f);
00742                ast_verbose("GOOGLE! DTMF-relay event received: %c\n", (int) f.subclass.integer);
00743             } else if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-down")) {
00744                struct ast_frame f = {AST_FRAME_DTMF_END, };
00745                f.subclass.integer = dtmf[0];
00746                ast_queue_frame(tmp->owner, &f);
00747                ast_verbose("GOOGLE! DTMF-relay event received: %c\n", (int) f.subclass.integer);
00748             } else if(iks_find_attrib(pak->x, "dtmf")) { /* 250 millasecond default */
00749                struct ast_frame f = {AST_FRAME_DTMF, };
00750                f.subclass.integer = dtmf[0];
00751                ast_queue_frame(tmp->owner, &f);
00752                ast_verbose("GOOGLE! DTMF-relay event received: %c\n", (int) f.subclass.integer);
00753             }
00754          }
00755       } else if ((dtmfnode = iks_find_with_attrib(pak->x, "gtalk", "action", "session-info"))) {
00756          if((dtmfchild = iks_find(dtmfnode, "dtmf"))) {
00757             if((dtmf = iks_find_attrib(dtmfchild, "code"))) {
00758                if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-up")) {
00759                   struct ast_frame f = {AST_FRAME_DTMF_END, };
00760                   f.subclass.integer = dtmf[0];
00761                   ast_queue_frame(tmp->owner, &f);
00762                   ast_verbose("GOOGLE! DTMF-relay event received: %c\n", (int) f.subclass.integer);
00763                } else if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-down")) {
00764                   struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
00765                   f.subclass.integer = dtmf[0];
00766                   ast_queue_frame(tmp->owner, &f);
00767                   ast_verbose("GOOGLE! DTMF-relay event received: %c\n", (int) f.subclass.integer);
00768                }
00769             }
00770          }
00771       }
00772       gtalk_response(client, from, pak, NULL, NULL);
00773       return 1;
00774    } else {
00775       ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
00776    }
00777 
00778    gtalk_response(client, from, pak, NULL, NULL);
00779    return 1;
00780 }
00781 
00782 static int gtalk_hangup_farend(struct gtalk *client, ikspak *pak)
00783 {
00784    struct gtalk_pvt *tmp;
00785    char *from;
00786 
00787    ast_debug(1, "The client is %s\n", client->name);
00788    /* Make sure our new call doesn't exist yet */
00789    for (tmp = client->p; tmp; tmp = tmp->next) {
00790       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) ||
00791          (iks_find_attrib(pak->query, "id") && !strcmp(iks_find_attrib(pak->query, "id"), tmp->sid))) {
00792          break;
00793       }
00794    }
00795    from = iks_find_attrib(pak->x, "to");
00796    if (!from) {
00797       from = client->connection->jid->full;
00798    }
00799 
00800    if (tmp) {
00801       tmp->alreadygone = 1;
00802       if (tmp->owner) {
00803          ast_queue_hangup(tmp->owner);
00804       }
00805    } else {
00806       ast_log(LOG_NOTICE, "Whoa, didn't find call during hangup!\n");
00807    }
00808    gtalk_response(client, from, pak, NULL, NULL);
00809    return 1;
00810 }
00811 
00812 static int gtalk_get_local_ip(struct ast_sockaddr *ourip)
00813 {
00814    struct ast_sockaddr root;
00815    struct ast_sockaddr bindaddr_tmp;
00816    struct ast_sockaddr *addrs;
00817    int addrs_cnt;
00818 
00819    /* If bind address is not 0.0.0.0, then bindaddr is our local ip. */
00820    ast_sockaddr_from_sin(&bindaddr_tmp, &bindaddr);
00821    if (!ast_sockaddr_is_any(&bindaddr_tmp)) {
00822       ast_sockaddr_copy(ourip, &bindaddr_tmp);
00823       return 0;
00824    }
00825 
00826    /* If no bind address was provided, lets see what ip we would use to connect to google.com and use that.
00827     * If you can't resolve google.com from your network, then this module is useless for you anyway. */
00828    if ((addrs_cnt = ast_sockaddr_resolve(&addrs, "google.com", PARSE_PORT_FORBID, AF_INET)) > 0) {
00829       ast_sockaddr_copy(&root, &addrs[0]);
00830       ast_free(addrs);
00831       if (!ast_ouraddrfor(&root, ourip)) {
00832          return 0;
00833       }
00834    }
00835 
00836    /* As a last resort, use this function to find our local address. */
00837    return ast_find_ourip(ourip, &bindaddr_tmp, AF_INET);
00838 }
00839 
00840 static int gtalk_create_candidates(struct gtalk *client, struct gtalk_pvt *p, char *sid, char *from, char *to)
00841 {
00842    struct gtalk_candidate *tmp;
00843    struct aji_client *c = client->connection;
00844    struct gtalk_candidate *ours1 = NULL, *ours2 = NULL;
00845    struct sockaddr_in sin = { 0, };
00846    struct ast_sockaddr sin_tmp;
00847    struct ast_sockaddr us;
00848    iks *iq, *gtalk, *candidate, *transport;
00849    char user[17], pass[17], preference[5], port[7];
00850    char *lowerfrom = NULL;
00851 
00852    iq = iks_new("iq");
00853    gtalk = iks_new("session");
00854    candidate = iks_new("candidate");
00855    transport = iks_new("transport");
00856    if (!iq || !gtalk || !candidate || !transport) {
00857       ast_log(LOG_ERROR, "Memory allocation error\n");
00858       goto safeout;
00859    }
00860    ours1 = ast_calloc(1, sizeof(*ours1));
00861    ours2 = ast_calloc(1, sizeof(*ours2));
00862    if (!ours1 || !ours2)
00863       goto safeout;
00864 
00865    iks_insert_attrib(transport, "xmlns",GOOGLE_TRANSPORT_NS);
00866    iks_insert_node(iq, gtalk);
00867    iks_insert_node(gtalk,candidate);
00868    iks_insert_node(gtalk,transport);
00869 
00870    for (; p; p = p->next) {
00871       if (!strcasecmp(p->sid, sid))
00872          break;
00873    }
00874 
00875    if (!p) {
00876       ast_log(LOG_NOTICE, "No matching gtalk session - SID %s!\n", sid);
00877       goto safeout;
00878    }
00879 
00880    ast_rtp_instance_get_local_address(p->rtp, &sin_tmp);
00881    ast_sockaddr_to_sin(&sin_tmp, &sin);
00882 
00883    gtalk_get_local_ip(&us);
00884 
00885    if (!strcmp(ast_sockaddr_stringify_addr(&us), "127.0.0.1")) {
00886       ast_log(LOG_WARNING, "Found a loopback IP on the system, check your network configuration or set the bindaddr attribute.");
00887    }
00888 
00889    /* Setup our gtalk candidates */
00890    ast_copy_string(ours1->name, "rtp", sizeof(ours1->name));
00891    ours1->port = ntohs(sin.sin_port);
00892    ours1->preference = 1;
00893    snprintf(user, sizeof(user), "%08lx%08lx", ast_random(), ast_random());
00894    snprintf(pass, sizeof(pass), "%08lx%08lx", ast_random(), ast_random());
00895    ast_copy_string(ours1->username, user, sizeof(ours1->username));
00896    ast_copy_string(ours1->password, pass, sizeof(ours1->password));
00897    ast_copy_string(ours1->ip, ast_sockaddr_stringify_addr(&us),
00898          sizeof(ours1->ip));
00899    ours1->protocol = AJI_PROTOCOL_UDP;
00900    ours1->type = AJI_CONNECT_LOCAL;
00901    ours1->generation = 0;
00902    p->ourcandidates = ours1;
00903 
00904    /* XXX this is a blocking action.  We send a STUN request to the server
00905     * and wait for the response.  If blocking here is a problem the STUN requests/responses
00906     * for the externip may need to be done differently. */
00907    gtalk_update_externip();
00908    if (!ast_strlen_zero(externip)) {
00909       ast_copy_string(ours2->username, user, sizeof(ours2->username));
00910       ast_copy_string(ours2->password, pass, sizeof(ours2->password));
00911       ast_copy_string(ours2->ip, externip, sizeof(ours2->ip));
00912       ast_copy_string(ours2->name, "rtp", sizeof(ours1->name));
00913       ours2->port = ntohs(sin.sin_port);
00914       ours2->preference = 0.9;
00915       ours2->protocol = AJI_PROTOCOL_UDP;
00916       ours2->type = AJI_CONNECT_STUN;
00917       ours2->generation = 0;
00918       ours1->next = ours2;
00919       ours2 = NULL;
00920    }
00921    ours1 = NULL;
00922 
00923    for (tmp = p->ourcandidates; tmp; tmp = tmp->next) {
00924       snprintf(port, sizeof(port), "%d", tmp->port);
00925       snprintf(preference, sizeof(preference), "%.2f", tmp->preference);
00926       iks_insert_attrib(iq, "from", to);
00927       iks_insert_attrib(iq, "to", from);
00928       iks_insert_attrib(iq, "type", "set");
00929       iks_insert_attrib(iq, "id", c->mid);
00930       ast_aji_increment_mid(c->mid);
00931       iks_insert_attrib(gtalk, "type", "candidates");
00932       iks_insert_attrib(gtalk, "id", sid);
00933       /* put the initiator attribute to lower case if we receive the call
00934        * otherwise GoogleTalk won't establish the session */
00935       if (!p->initiator) {
00936               char c;
00937          char *t = lowerfrom = ast_strdupa(from);
00938          while (((c = *t) != '/') && (*t++ = tolower(c)));
00939       }
00940       iks_insert_attrib(gtalk, "initiator", (p->initiator) ? to : lowerfrom);
00941       iks_insert_attrib(gtalk, "xmlns", GOOGLE_NS);
00942       iks_insert_attrib(candidate, "name", tmp->name);
00943       iks_insert_attrib(candidate, "address", tmp->ip);
00944       iks_insert_attrib(candidate, "port", port);
00945       iks_insert_attrib(candidate, "username", tmp->username);
00946       iks_insert_attrib(candidate, "password", tmp->password);
00947       iks_insert_attrib(candidate, "preference", preference);
00948       if (tmp->protocol == AJI_PROTOCOL_UDP)
00949          iks_insert_attrib(candidate, "protocol", "udp");
00950       if (tmp->protocol == AJI_PROTOCOL_SSLTCP)
00951          iks_insert_attrib(candidate, "protocol", "ssltcp");
00952       if (tmp->type == AJI_CONNECT_STUN)
00953          iks_insert_attrib(candidate, "type", "stun");
00954       if (tmp->type == AJI_CONNECT_LOCAL)
00955          iks_insert_attrib(candidate, "type", "local");
00956       if (tmp->type == AJI_CONNECT_RELAY)
00957          iks_insert_attrib(candidate, "type", "relay");
00958       iks_insert_attrib(candidate, "network", "0");
00959       iks_insert_attrib(candidate, "generation", "0");
00960       ast_aji_send(c, iq);
00961    }
00962    p->laststun = 0;
00963 
00964 safeout:
00965    if (ours1)
00966       ast_free(ours1);
00967    if (ours2)
00968       ast_free(ours2);
00969    iks_delete(iq);
00970    iks_delete(gtalk);
00971    iks_delete(candidate);
00972    iks_delete(transport);
00973 
00974    return 1;
00975 }
00976 
00977 static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid)
00978 {
00979    struct gtalk_pvt *tmp = NULL;
00980    struct aji_resource *resources = NULL;
00981    struct aji_buddy *buddy = NULL;
00982    char idroster[200];
00983    char *data, *exten = NULL;
00984    struct ast_sockaddr bindaddr_tmp;
00985 
00986    ast_debug(1, "The client is %s for alloc\n", client->name);
00987    if (!sid && !strchr(them, '/')) {   /* I started call! */
00988       if (!strcasecmp(client->name, "guest")) {
00989          buddy = ASTOBJ_CONTAINER_FIND(&client->connection->buddies, them);
00990          if (buddy) {
00991             resources = buddy->resources;
00992          }
00993       } else if (client->buddy) {
00994          resources = client->buddy->resources;
00995       }
00996 
00997       while (resources) {
00998          if (resources->cap->jingle) {
00999             break;
01000          }
01001          resources = resources->next;
01002       }
01003       if (resources) {
01004          snprintf(idroster, sizeof(idroster), "%s/%s", them, resources->resource);
01005       } else if ((*them == '+') || (strstr(them, "@voice.google.com"))) {
01006          snprintf(idroster, sizeof(idroster), "%s", them);
01007       } else {
01008          ast_log(LOG_ERROR, "no gtalk capable clients to talk to.\n");
01009          if (buddy) {
01010             ASTOBJ_UNREF(buddy, ast_aji_buddy_destroy);
01011          }
01012          return NULL;
01013       }
01014       if (buddy) {
01015          ASTOBJ_UNREF(buddy, ast_aji_buddy_destroy);
01016       }
01017    }
01018    if (!(tmp = ast_calloc(1, sizeof(*tmp)))) {
01019       return NULL;
01020    }
01021 
01022    memcpy(&tmp->prefs, &client->prefs, sizeof(struct ast_codec_pref));
01023 
01024    if (sid) {
01025       ast_copy_string(tmp->sid, sid, sizeof(tmp->sid));
01026       ast_copy_string(tmp->them, them, sizeof(tmp->them));
01027       ast_copy_string(tmp->us, us, sizeof(tmp->us));
01028    } else {
01029       snprintf(tmp->sid, sizeof(tmp->sid), "%08lx%08lx", ast_random(), ast_random());
01030       ast_copy_string(tmp->them, idroster, sizeof(tmp->them));
01031       ast_copy_string(tmp->us, us, sizeof(tmp->us));
01032       tmp->initiator = 1;
01033    }
01034    /* clear codecs */
01035    bindaddr.sin_family = AF_INET;
01036    ast_sockaddr_from_sin(&bindaddr_tmp, &bindaddr);
01037    if (!(tmp->rtp = ast_rtp_instance_new("asterisk", sched, &bindaddr_tmp, NULL))) {
01038      ast_log(LOG_ERROR, "Failed to create a new RTP instance (possibly an invalid bindaddr?)\n");
01039      ast_free(tmp);
01040      return NULL;
01041    }
01042    ast_rtp_instance_set_prop(tmp->rtp, AST_RTP_PROPERTY_RTCP, 1);
01043    ast_rtp_instance_set_prop(tmp->rtp, AST_RTP_PROPERTY_STUN, 1);
01044    ast_rtp_instance_set_prop(tmp->rtp, AST_RTP_PROPERTY_DTMF, 1);
01045    ast_rtp_instance_dtmf_mode_set(tmp->rtp, AST_RTP_DTMF_MODE_RFC2833);
01046    ast_rtp_codecs_payloads_clear(ast_rtp_instance_get_codecs(tmp->rtp), tmp->rtp);
01047 
01048    /* add user configured codec capabilites */
01049    if (client->capability) {
01050       tmp->capability = client->capability;
01051    } else if (global_capability) {
01052       tmp->capability = global_capability;
01053    }
01054 
01055    tmp->parent = client;
01056    if (!tmp->rtp) {
01057       ast_log(LOG_WARNING, "Out of RTP sessions?\n");
01058       ast_free(tmp);
01059       return NULL;
01060    }
01061 
01062    /* Set CALLERID(name) to the full JID of the remote peer */
01063    ast_copy_string(tmp->cid_name, tmp->them, sizeof(tmp->cid_name));
01064 
01065    if(strchr(tmp->us, '/')) {
01066       data = ast_strdupa(tmp->us);
01067       exten = strsep(&data, "/");
01068    } else {
01069       exten = tmp->us;
01070    }
01071    ast_copy_string(tmp->exten,  exten, sizeof(tmp->exten));
01072    ast_mutex_init(&tmp->lock);
01073    ast_mutex_lock(&gtalklock);
01074    tmp->next = client->p;
01075    client->p = tmp;
01076    ast_mutex_unlock(&gtalklock);
01077    return tmp;
01078 }
01079 
01080 /*! \brief Start new gtalk channel */
01081 static struct ast_channel *gtalk_new(struct gtalk *client, struct gtalk_pvt *i, int state, const char *title, const char *linkedid)
01082 {
01083    struct ast_channel *tmp;
01084    int fmt;
01085    int what;
01086    const char *n2;
01087 
01088    if (title)
01089       n2 = title;
01090    else
01091       n2 = i->us;
01092    tmp = ast_channel_alloc(1, state, i->cid_num, i->cid_name, linkedid, client->accountcode, i->exten, client->context, client->amaflags, "Gtalk/%s-%04lx", n2, ast_random() & 0xffff);
01093    if (!tmp) {
01094       ast_log(LOG_WARNING, "Unable to allocate Gtalk channel structure!\n");
01095       return NULL;
01096    }
01097    tmp->tech = &gtalk_tech;
01098 
01099    /* Select our native format based on codec preference until we receive
01100       something from another device to the contrary. */
01101    if (i->jointcapability)
01102       what = i->jointcapability;
01103    else if (i->capability)
01104       what = i->capability;
01105    else
01106       what = global_capability;
01107 
01108    /* Set Frame packetization */
01109    if (i->rtp) {
01110       ast_rtp_codecs_packetization_set(ast_rtp_instance_get_codecs(i->rtp), i->rtp, &i->prefs);
01111    }
01112 
01113    tmp->nativeformats = ast_codec_choose(&i->prefs, what, 1) | (i->jointcapability & AST_FORMAT_VIDEO_MASK);
01114    fmt = ast_best_codec(tmp->nativeformats);
01115 
01116    if (i->rtp) {
01117       ast_channel_set_fd(tmp, 0, ast_rtp_instance_fd(i->rtp, 0));
01118       ast_channel_set_fd(tmp, 1, ast_rtp_instance_fd(i->rtp, 1));
01119    }
01120    if (i->vrtp) {
01121       ast_channel_set_fd(tmp, 2, ast_rtp_instance_fd(i->vrtp, 0));
01122       ast_channel_set_fd(tmp, 3, ast_rtp_instance_fd(i->vrtp, 1));
01123    }
01124    if (state == AST_STATE_RING)
01125       tmp->rings = 1;
01126    tmp->adsicpe = AST_ADSI_UNAVAILABLE;
01127    tmp->writeformat = fmt;
01128    tmp->rawwriteformat = fmt;
01129    tmp->readformat = fmt;
01130    tmp->rawreadformat = fmt;
01131    tmp->tech_pvt = i;
01132 
01133    tmp->callgroup = client->callgroup;
01134    tmp->pickupgroup = client->pickupgroup;
01135    tmp->caller.id.name.presentation = client->callingpres;
01136    tmp->caller.id.number.presentation = client->callingpres;
01137    if (!ast_strlen_zero(client->accountcode))
01138       ast_string_field_set(tmp, accountcode, client->accountcode);
01139    if (client->amaflags)
01140       tmp->amaflags = client->amaflags;
01141    if (!ast_strlen_zero(client->language))
01142       ast_string_field_set(tmp, language, client->language);
01143    if (!ast_strlen_zero(client->musicclass))
01144       ast_string_field_set(tmp, musicclass, client->musicclass);
01145    if (!ast_strlen_zero(client->parkinglot))
01146       ast_string_field_set(tmp, parkinglot, client->parkinglot);
01147    i->owner = tmp;
01148    ast_module_ref(ast_module_info->self);
01149    ast_copy_string(tmp->context, client->context, sizeof(tmp->context));
01150    ast_copy_string(tmp->exten, i->exten, sizeof(tmp->exten));
01151 
01152    if (!ast_strlen_zero(i->exten) && strcmp(i->exten, "s")) {
01153       tmp->dialed.number.str = ast_strdup(i->exten);
01154    }
01155    tmp->priority = 1;
01156    if (i->rtp)
01157       ast_jb_configure(tmp, &global_jbconf);
01158    if (state != AST_STATE_DOWN && ast_pbx_start(tmp)) {
01159       ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
01160       tmp->hangupcause = AST_CAUSE_SWITCH_CONGESTION;
01161       ast_hangup(tmp);
01162       tmp = NULL;
01163    } else {
01164       manager_event(EVENT_FLAG_SYSTEM, "ChannelUpdate",
01165          "Channel: %s\r\nChanneltype: %s\r\nGtalk-SID: %s\r\n",
01166          i->owner ? i->owner->name : "", "Gtalk", i->sid);
01167    }
01168    return tmp;
01169 }
01170 
01171 static int gtalk_action(struct gtalk *client, struct gtalk_pvt *p, const char *action)
01172 {
01173    iks *request, *session = NULL;
01174    int res = -1;
01175    char *lowerthem = NULL;
01176 
01177    request = iks_new("iq");
01178    if (request) {
01179       iks_insert_attrib(request, "type", "set");
01180       iks_insert_attrib(request, "from", p->us);
01181       iks_insert_attrib(request, "to", p->them);
01182       iks_insert_attrib(request, "id", client->connection->mid);
01183       ast_aji_increment_mid(client->connection->mid);
01184       session = iks_new("session");
01185       if (session) {
01186          iks_insert_attrib(session, "type", action);
01187          iks_insert_attrib(session, "id", p->sid);
01188          /* put the initiator attribute to lower case if we receive the call
01189           * otherwise GoogleTalk won't establish the session */
01190          if (!p->initiator) {
01191                  char c;
01192             char *t = lowerthem = ast_strdupa(p->them);
01193             while (((c = *t) != '/') && (*t++ = tolower(c)));
01194          }
01195          iks_insert_attrib(session, "initiator", p->initiator ? p->us : lowerthem);
01196          iks_insert_attrib(session, "xmlns", GOOGLE_NS);
01197          iks_insert_node(request, session);
01198          ast_aji_send(client->connection, request);
01199          res = 0;
01200       }
01201    }
01202 
01203    iks_delete(session);
01204    iks_delete(request);
01205 
01206    return res;
01207 }
01208 
01209 static void gtalk_free_candidates(struct gtalk_candidate *candidate)
01210 {
01211    struct gtalk_candidate *last;
01212    while (candidate) {
01213       last = candidate;
01214       candidate = candidate->next;
01215       ast_free(last);
01216    }
01217 }
01218 
01219 static void gtalk_free_pvt(struct gtalk *client, struct gtalk_pvt *p)
01220 {
01221    struct gtalk_pvt *cur, *prev = NULL;
01222    cur = client->p;
01223    while (cur) {
01224       if (cur == p) {
01225          if (prev)
01226             prev->next = p->next;
01227          else
01228             client->p = p->next;
01229          break;
01230       }
01231       prev = cur;
01232       cur = cur->next;
01233    }
01234    if (p->ringrule)
01235       iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
01236    if (p->owner)
01237       ast_log(LOG_WARNING, "Uh oh, there's an owner, this is going to be messy.\n");
01238    if (p->rtp)
01239       ast_rtp_instance_destroy(p->rtp);
01240    if (p->vrtp)
01241       ast_rtp_instance_destroy(p->vrtp);
01242    gtalk_free_candidates(p->theircandidates);
01243    ast_free(p);
01244 }
01245 
01246 
01247 static int gtalk_newcall(struct gtalk *client, ikspak *pak)
01248 {
01249    struct gtalk_pvt *p, *tmp = client->p;
01250    struct ast_channel *chan;
01251    int res;
01252    iks *codec;
01253    char *from = NULL;
01254    char s1[BUFSIZ], s2[BUFSIZ], s3[BUFSIZ];
01255    int peernoncodeccapability;
01256    char *sid;
01257 
01258    /* Make sure our new call doesn't exist yet */
01259    from = iks_find_attrib(pak->x,"to");
01260    if (!from) {
01261       from = client->connection->jid->full;
01262    }
01263 
01264    while (tmp) {
01265       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) ||
01266          (iks_find_attrib(pak->query, "id") && !strcmp(iks_find_attrib(pak->query, "id"), tmp->sid))) {
01267          ast_log(LOG_NOTICE, "Ignoring duplicate call setup on SID %s\n", tmp->sid);
01268          gtalk_response(client, from, pak, "out-of-order", NULL);
01269          return -1;
01270       }
01271       tmp = tmp->next;
01272    }
01273 
01274    if (!strcasecmp(client->name, "guest")){
01275       /* the guest account is not tied to any configured XMPP client,
01276          let's set it now */
01277       if (client->connection) {
01278          ASTOBJ_UNREF(client->connection, ast_aji_client_destroy);
01279       }
01280       client->connection = ast_aji_get_client(from);
01281       if (!client->connection) {
01282          ast_log(LOG_ERROR, "No XMPP client to talk to, us (partial JID) : %s\n", from);
01283          return -1;
01284       }
01285    }
01286 
01287    if (!(sid = iks_find_attrib(pak->query, "id"))) {
01288       ast_log(LOG_WARNING, "Received Initiate without id attribute. Can not start call.\n");
01289       return -1;
01290    }
01291 
01292    p = gtalk_alloc(client, from, pak->from->full, sid);
01293    if (!p) {
01294       ast_log(LOG_WARNING, "Unable to allocate gtalk structure!\n");
01295       return -1;
01296    }
01297 
01298    chan = gtalk_new(client, p, AST_STATE_DOWN, pak->from->user, NULL);
01299    if (!chan) {
01300       gtalk_free_pvt(client, p);
01301       return -1;
01302    }
01303 
01304    ast_mutex_lock(&p->lock);
01305    ast_copy_string(p->them, pak->from->full, sizeof(p->them));
01306    ast_copy_string(p->sid, sid, sizeof(p->sid));
01307 
01308    /* codec points to the first <payload-type/> tag */
01309    codec = iks_first_tag(iks_first_tag(pak->query));
01310 
01311    while (codec) {
01312       char *codec_id = iks_find_attrib(codec, "id");
01313       char *codec_name = iks_find_attrib(codec, "name");
01314       if (!codec_id || !codec_name) {
01315          codec = iks_next_tag(codec);
01316          continue;
01317       }
01318       if (!strcmp(S_OR(iks_name(codec), ""), "vid:payload-type") && p->vrtp) {
01319          ast_rtp_codecs_payloads_set_m_type(
01320             ast_rtp_instance_get_codecs(p->vrtp),
01321             p->vrtp,
01322             atoi(codec_id));
01323          ast_rtp_codecs_payloads_set_rtpmap_type(
01324             ast_rtp_instance_get_codecs(p->vrtp),
01325             p->vrtp,
01326             atoi(codec_id),
01327             "video",
01328             codec_name,
01329             0);
01330       } else {
01331          ast_rtp_codecs_payloads_set_m_type(
01332             ast_rtp_instance_get_codecs(p->rtp),
01333             p->rtp,
01334             atoi(codec_id));
01335          ast_rtp_codecs_payloads_set_rtpmap_type(
01336             ast_rtp_instance_get_codecs(p->rtp),
01337             p->rtp,
01338             atoi(codec_id),
01339             "audio",
01340             codec_name,
01341             0);
01342       }
01343       codec = iks_next_tag(codec);
01344    }
01345 
01346    /* Now gather all of the codecs that we are asked for */
01347    ast_rtp_codecs_payload_formats(ast_rtp_instance_get_codecs(p->rtp), &p->peercapability, &peernoncodeccapability);
01348    p->jointcapability = p->capability & p->peercapability;
01349    ast_mutex_unlock(&p->lock);
01350 
01351    ast_setstate(chan, AST_STATE_RING);
01352    if (!p->jointcapability) {
01353       ast_log(LOG_WARNING, "Capabilities don't match : us - %s, peer - %s, combined - %s \n", ast_getformatname_multiple(s1, BUFSIZ, p->capability),
01354          ast_getformatname_multiple(s2, BUFSIZ, p->peercapability),
01355          ast_getformatname_multiple(s3, BUFSIZ, p->jointcapability));
01356       /* close session if capabilities don't match */
01357       gtalk_action(client, p, "reject");
01358       p->alreadygone = 1;
01359       gtalk_hangup(chan);
01360       ast_channel_release(chan);
01361       return -1;
01362    }
01363 
01364    res = ast_pbx_start(chan);
01365 
01366    switch (res) {
01367    case AST_PBX_FAILED:
01368       ast_log(LOG_WARNING, "Failed to start PBX :(\n");
01369       gtalk_response(client, from, pak, "service-unavailable", NULL);
01370       break;
01371    case AST_PBX_CALL_LIMIT:
01372       ast_log(LOG_WARNING, "Failed to start PBX (call limit reached) \n");
01373       gtalk_response(client, from, pak, "service-unavailable", NULL);
01374       break;
01375    case AST_PBX_SUCCESS:
01376       gtalk_response(client, from, pak, NULL, NULL);
01377       gtalk_create_candidates(client, p, p->sid, p->them, p->us);
01378       /* nothing to do */
01379       break;
01380    }
01381 
01382    return 1;
01383 }
01384 
01385 static int gtalk_update_externip(void)
01386 {
01387    int sock;
01388    char *newaddr;
01389    struct sockaddr_in answer = { 0, };
01390    struct sockaddr_in *dst;
01391    struct ast_sockaddr tmp_dst;
01392 
01393    if (!stunaddr.sin_addr.s_addr) {
01394       return -1;
01395    }
01396    dst = &stunaddr;
01397 
01398    sock = socket(AF_INET, SOCK_DGRAM, 0);
01399    if (sock < 0) {
01400       ast_log(LOG_WARNING, "Unable to create STUN socket: %s\n", strerror(errno));
01401       return -1;
01402    }
01403 
01404    ast_sockaddr_from_sin(&tmp_dst, dst);
01405    if (ast_connect(sock, &tmp_dst) != 0) {
01406       ast_log(LOG_WARNING, "STUN Failed to connect to %s\n", ast_sockaddr_stringify(&tmp_dst));
01407       close(sock);
01408       return -1;
01409    }
01410 
01411    if ((ast_stun_request(sock, &stunaddr, NULL, &answer))) {
01412       close(sock);
01413       return -1;
01414    }
01415 
01416    newaddr = ast_strdupa(ast_inet_ntoa(answer.sin_addr));
01417    memcpy(externip, newaddr, sizeof(externip));
01418 
01419    close(sock);
01420    return 0;
01421 
01422 }
01423 
01424 static int gtalk_update_stun(struct gtalk *client, struct gtalk_pvt *p)
01425 {
01426    struct gtalk_candidate *tmp;
01427    struct hostent *hp;
01428    struct ast_hostent ahp;
01429    struct sockaddr_in sin = { 0, };
01430    struct sockaddr_in aux = { 0, };
01431    struct ast_sockaddr sin_tmp;
01432    struct ast_sockaddr aux_tmp;
01433 
01434    if (time(NULL) == p->laststun)
01435       return 0;
01436 
01437    tmp = p->theircandidates;
01438    p->laststun = time(NULL);
01439    while (tmp) {
01440       char username[256];
01441 
01442       /* Find the IP address of the host */
01443       if (!(hp = ast_gethostbyname(tmp->ip, &ahp))) {
01444          ast_log(LOG_WARNING, "Could not get host by name for %s\n", tmp->ip);
01445          tmp = tmp->next;
01446          continue;
01447       }
01448       sin.sin_family = AF_INET;
01449       memcpy(&sin.sin_addr, hp->h_addr, sizeof(sin.sin_addr));
01450       sin.sin_port = htons(tmp->port);
01451       snprintf(username, sizeof(username), "%s%s", tmp->username, p->ourcandidates->username);
01452 
01453       /* Find out the result of the STUN */
01454       ast_rtp_instance_get_remote_address(p->rtp, &aux_tmp);
01455       ast_sockaddr_to_sin(&aux_tmp, &aux);
01456 
01457       /* If the STUN result is different from the IP of the hostname,
01458        * lock on the stun IP of the hostname advertised by the
01459        * remote client */
01460       if (aux.sin_addr.s_addr && (aux.sin_addr.s_addr != sin.sin_addr.s_addr)) {
01461          ast_rtp_instance_stun_request(p->rtp, &aux_tmp, username);
01462       } else {
01463          ast_sockaddr_from_sin(&sin_tmp, &sin);
01464          ast_rtp_instance_stun_request(p->rtp, &sin_tmp, username);
01465       }
01466       if (aux.sin_addr.s_addr) {
01467          ast_debug(4, "Receiving RTP traffic from IP %s, matches with remote candidate's IP %s\n", ast_inet_ntoa(aux.sin_addr), tmp->ip);
01468          ast_debug(4, "Sending STUN request to %s\n", tmp->ip);
01469       }
01470 
01471       tmp = tmp->next;
01472    }
01473    return 1;
01474 }
01475 
01476 static int gtalk_add_candidate(struct gtalk *client, ikspak *pak)
01477 {
01478    struct gtalk_pvt *p = NULL, *tmp = NULL;
01479    struct aji_client *c = client->connection;
01480    struct gtalk_candidate *newcandidate = NULL;
01481    iks *traversenodes = NULL, *receipt = NULL;
01482    char *from;
01483 
01484    from = iks_find_attrib(pak->x,"to");
01485    if (!from) {
01486       from = c->jid->full;
01487    }
01488 
01489    for (tmp = client->p; tmp; tmp = tmp->next) {
01490       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) ||
01491          (iks_find_attrib(pak->query, "id") && !strcmp(iks_find_attrib(pak->query, "id"), tmp->sid))) {
01492          p = tmp;
01493          break;
01494       }
01495    }
01496 
01497    if (!p) {
01498       return -1;
01499    }
01500    traversenodes = pak->query;
01501    while(traversenodes) {
01502       if(!strcasecmp(S_OR(iks_name(traversenodes), ""), "session")) {
01503          traversenodes = iks_first_tag(traversenodes);
01504          continue;
01505       }
01506       if(!strcasecmp(S_OR(iks_name(traversenodes), ""), "ses:session")) {
01507          traversenodes = iks_child(traversenodes);
01508          continue;
01509       }
01510       if(!strcasecmp(S_OR(iks_name(traversenodes), ""), "candidate") || !strcasecmp(S_OR(iks_name(traversenodes), ""), "ses:candidate")) {
01511          newcandidate = ast_calloc(1, sizeof(*newcandidate));
01512          if (!newcandidate)
01513             return 0;
01514          ast_copy_string(newcandidate->name,
01515             S_OR(iks_find_attrib(traversenodes, "name"), ""),
01516             sizeof(newcandidate->name));
01517          ast_copy_string(newcandidate->ip,
01518             S_OR(iks_find_attrib(traversenodes, "address"), ""),
01519             sizeof(newcandidate->ip));
01520          newcandidate->port = atoi(iks_find_attrib(traversenodes, "port"));
01521          ast_copy_string(newcandidate->username,
01522             S_OR(iks_find_attrib(traversenodes, "username"), ""),
01523             sizeof(newcandidate->username));
01524          ast_copy_string(newcandidate->password,
01525             S_OR(iks_find_attrib(traversenodes, "password"), ""),
01526             sizeof(newcandidate->password));
01527          newcandidate->preference = atof(iks_find_attrib(traversenodes, "preference"));
01528          if (!strcasecmp(S_OR(iks_find_attrib(traversenodes, "protocol"), ""), "udp"))
01529             newcandidate->protocol = AJI_PROTOCOL_UDP;
01530          if (!strcasecmp(S_OR(iks_find_attrib(traversenodes, "protocol"), ""), "ssltcp"))
01531             newcandidate->protocol = AJI_PROTOCOL_SSLTCP;
01532 
01533          if (!strcasecmp(S_OR(iks_find_attrib(traversenodes, "type"), ""), "stun"))
01534             newcandidate->type = AJI_CONNECT_STUN;
01535          if (!strcasecmp(S_OR(iks_find_attrib(traversenodes, "type"), ""), "local"))
01536             newcandidate->type = AJI_CONNECT_LOCAL;
01537          if (!strcasecmp(S_OR(iks_find_attrib(traversenodes, "type"), ""), "relay"))
01538             newcandidate->type = AJI_CONNECT_RELAY;
01539          ast_copy_string(newcandidate->network,
01540             S_OR(iks_find_attrib(traversenodes, "network"), ""),
01541             sizeof(newcandidate->network));
01542          newcandidate->generation = atoi(S_OR(iks_find_attrib(traversenodes, "generation"), "0"));
01543          newcandidate->next = NULL;
01544 
01545          newcandidate->next = p->theircandidates;
01546          p->theircandidates = newcandidate;
01547          p->laststun = 0;
01548          gtalk_update_stun(p->parent, p);
01549          newcandidate = NULL;
01550       }
01551       traversenodes = iks_next_tag(traversenodes);
01552    }
01553 
01554    receipt = iks_new("iq");
01555    iks_insert_attrib(receipt, "type", "result");
01556    iks_insert_attrib(receipt, "from", from);
01557    iks_insert_attrib(receipt, "to", S_OR(iks_find_attrib(pak->x, "from"), ""));
01558    iks_insert_attrib(receipt, "id", S_OR(iks_find_attrib(pak->x, "id"), ""));
01559    ast_aji_send(c, receipt);
01560 
01561    iks_delete(receipt);
01562 
01563    return 1;
01564 }
01565 
01566 static struct ast_frame *gtalk_rtp_read(struct ast_channel *ast, struct gtalk_pvt *p)
01567 {
01568    struct ast_frame *f;
01569 
01570    if (!p->rtp) {
01571       return &ast_null_frame;
01572    }
01573    f = ast_rtp_instance_read(p->rtp, 0);
01574    gtalk_update_stun(p->parent, p);
01575    if (p->owner) {
01576       /* We already hold the channel lock */
01577       if (f->frametype == AST_FRAME_VOICE) {
01578          if (f->subclass.codec != (p->owner->nativeformats & AST_FORMAT_AUDIO_MASK)) {
01579             ast_debug(1, "Oooh, format changed to %s\n", ast_getformatname(f->subclass.codec));
01580             p->owner->nativeformats =
01581                (p->owner->nativeformats & AST_FORMAT_VIDEO_MASK) | f->subclass.codec;
01582             ast_set_read_format(p->owner, p->owner->readformat);
01583             ast_set_write_format(p->owner, p->owner->writeformat);
01584          }
01585          /* if ((ast_test_flag(p, SIP_DTMF) == SIP_DTMF_INBAND) && p->vad) {
01586             f = ast_dsp_process(p->owner, p->vad, f);
01587             if (option_debug && f && (f->frametype == AST_FRAME_DTMF))
01588                ast_debug(1, "* Detected inband DTMF '%c'\n", f->subclass);
01589            } */
01590       }
01591    }
01592    return f;
01593 }
01594 
01595 static struct ast_frame *gtalk_read(struct ast_channel *ast)
01596 {
01597    struct ast_frame *fr;
01598    struct gtalk_pvt *p = ast->tech_pvt;
01599 
01600    ast_mutex_lock(&p->lock);
01601    fr = gtalk_rtp_read(ast, p);
01602    ast_mutex_unlock(&p->lock);
01603    return fr;
01604 }
01605 
01606 /*! \brief Send frame to media channel (rtp) */
01607 static int gtalk_write(struct ast_channel *ast, struct ast_frame *frame)
01608 {
01609    struct gtalk_pvt *p = ast->tech_pvt;
01610    int res = 0;
01611    char buf[256];
01612 
01613    switch (frame->frametype) {
01614    case AST_FRAME_VOICE:
01615       if (!(frame->subclass.codec & ast->nativeformats)) {
01616          ast_log(LOG_WARNING,
01617                "Asked to transmit frame type %s, while native formats is %s (read/write = %s/%s)\n",
01618                ast_getformatname(frame->subclass.codec),
01619                ast_getformatname_multiple(buf, sizeof(buf), ast->nativeformats),
01620                ast_getformatname(ast->readformat),
01621                ast_getformatname(ast->writeformat));
01622          return 0;
01623       }
01624       if (p) {
01625          ast_mutex_lock(&p->lock);
01626          if (p->rtp) {
01627             res = ast_rtp_instance_write(p->rtp, frame);
01628          }
01629          ast_mutex_unlock(&p->lock);
01630       }
01631       break;
01632    case AST_FRAME_VIDEO:
01633       if (p) {
01634          ast_mutex_lock(&p->lock);
01635          if (p->vrtp) {
01636             res = ast_rtp_instance_write(p->vrtp, frame);
01637          }
01638          ast_mutex_unlock(&p->lock);
01639       }
01640       break;
01641    case AST_FRAME_IMAGE:
01642       return 0;
01643       break;
01644    default:
01645       ast_log(LOG_WARNING, "Can't send %d type frames with Gtalk write\n",
01646             frame->frametype);
01647       return 0;
01648    }
01649 
01650    return res;
01651 }
01652 
01653 static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
01654 {
01655    struct gtalk_pvt *p = newchan->tech_pvt;
01656    ast_mutex_lock(&p->lock);
01657 
01658    if ((p->owner != oldchan)) {
01659       ast_mutex_unlock(&p->lock);
01660       return -1;
01661    }
01662    if (p->owner == oldchan)
01663       p->owner = newchan;
01664    ast_mutex_unlock(&p->lock);
01665    return 0;
01666 }
01667 
01668 static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen)
01669 {
01670    int res = 0;
01671 
01672    switch (condition) {
01673    case AST_CONTROL_HOLD:
01674       ast_moh_start(ast, data, NULL);
01675       break;
01676    case AST_CONTROL_UNHOLD:
01677       ast_moh_stop(ast);
01678       break;
01679    default:
01680       ast_debug(3, "Don't know how to indicate condition '%d'\n", condition);
01681       res = -1;
01682    }
01683 
01684    return res;
01685 }
01686 
01687 static int gtalk_sendtext(struct ast_channel *chan, const char *text)
01688 {
01689    int res = 0;
01690    struct aji_client *client = NULL;
01691    struct gtalk_pvt *p = chan->tech_pvt;
01692 
01693    if (!p->parent) {
01694       ast_log(LOG_ERROR, "Parent channel not found\n");
01695       return -1;
01696    }
01697    if (!p->parent->connection) {
01698       ast_log(LOG_ERROR, "XMPP client not found\n");
01699       return -1;
01700    }
01701    client = p->parent->connection;
01702    res = ast_aji_send_chat(client, p->them, text);
01703    return res;
01704 }
01705 
01706 static int gtalk_digit_begin(struct ast_channel *chan, char digit)
01707 {
01708    struct gtalk_pvt *p = chan->tech_pvt;
01709    int res = 0;
01710 
01711    ast_mutex_lock(&p->lock);
01712    if (p->rtp) {
01713       ast_rtp_instance_dtmf_begin(p->rtp, digit);
01714    } else {
01715       res = -1;
01716    }
01717    ast_mutex_unlock(&p->lock);
01718 
01719    return res;
01720 }
01721 
01722 static int gtalk_digit_end(struct ast_channel *chan, char digit, unsigned int duration)
01723 {
01724    struct gtalk_pvt *p = chan->tech_pvt;
01725    int res = 0;
01726 
01727    ast_mutex_lock(&p->lock);
01728    if (p->rtp) {
01729       ast_rtp_instance_dtmf_end_with_duration(p->rtp, digit, duration);
01730    } else {
01731       res = -1;
01732    }
01733    ast_mutex_unlock(&p->lock);
01734 
01735    return res;
01736 }
01737 
01738 /* This function is of not in use at the moment, but I am choosing to leave this
01739  * within the code base as a reference to how DTMF is possible through
01740  * jingle signaling.  However, google currently does DTMF through the RTP. */
01741 #if 0
01742 static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration)
01743 {
01744    struct gtalk_pvt *p = ast->tech_pvt;
01745    struct gtalk *client = p->parent;
01746    iks *iq, *gtalk, *dtmf;
01747    char buffer[2] = {digit, '\0'};
01748    char *lowerthem = NULL;
01749    iq = iks_new("iq");
01750    gtalk = iks_new("gtalk");
01751    dtmf = iks_new("dtmf");
01752    if(!iq || !gtalk || !dtmf) {
01753       iks_delete(iq);
01754       iks_delete(gtalk);
01755       iks_delete(dtmf);
01756       ast_log(LOG_ERROR, "Did not send dtmf do to memory issue\n");
01757       return -1;
01758    }
01759 
01760    iks_insert_attrib(iq, "type", "set");
01761    iks_insert_attrib(iq, "to", p->them);
01762    iks_insert_attrib(iq, "from", p->us);
01763    iks_insert_attrib(iq, "id", client->connection->mid);
01764    ast_aji_increment_mid(client->connection->mid);
01765    iks_insert_attrib(gtalk, "xmlns", "http://jabber.org/protocol/gtalk");
01766    iks_insert_attrib(gtalk, "action", "session-info");
01767    // put the initiator attribute to lower case if we receive the call
01768    // otherwise GoogleTalk won't establish the session
01769    if (!p->initiator) {
01770            char c;
01771            char *t = lowerthem = ast_strdupa(p->them);
01772            while (((c = *t) != '/') && (*t++ = tolower(c)));
01773    }
01774    iks_insert_attrib(gtalk, "initiator", p->initiator ? p->us: lowerthem);
01775    iks_insert_attrib(gtalk, "sid", p->sid);
01776    iks_insert_attrib(dtmf, "xmlns", "http://jabber.org/protocol/gtalk/info/dtmf");
01777    iks_insert_attrib(dtmf, "code", buffer);
01778    iks_insert_node(iq, gtalk);
01779    iks_insert_node(gtalk, dtmf);
01780 
01781    ast_mutex_lock(&p->lock);
01782    if (ast->dtmff.frametype == AST_FRAME_DTMF_BEGIN || duration == 0) {
01783       iks_insert_attrib(dtmf, "action", "button-down");
01784    } else if (ast->dtmff.frametype == AST_FRAME_DTMF_END || duration != 0) {
01785       iks_insert_attrib(dtmf, "action", "button-up");
01786    }
01787    ast_aji_send(client->connection, iq);
01788 
01789    iks_delete(iq);
01790    iks_delete(gtalk);
01791    iks_delete(dtmf);
01792    ast_mutex_unlock(&p->lock);
01793    return 0;
01794 }
01795 #endif
01796 
01797 static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen)
01798 {
01799    ast_log(LOG_NOTICE, "XXX Implement gtalk sendhtml XXX\n");
01800 
01801    return -1;
01802 }
01803 
01804 /*!\brief Initiate new call, part of PBX interface
01805  * dest is the dial string */
01806 static int gtalk_call(struct ast_channel *ast, char *dest, int timeout)
01807 {
01808    struct gtalk_pvt *p = ast->tech_pvt;
01809 
01810    if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
01811       ast_log(LOG_WARNING, "gtalk_call called on %s, neither down nor reserved\n", ast->name);
01812       return -1;
01813    }
01814 
01815    ast_setstate(ast, AST_STATE_RING);
01816    if (!p->ringrule) {
01817       ast_copy_string(p->ring, p->parent->connection->mid, sizeof(p->ring));
01818       p->ringrule = iks_filter_add_rule(p->parent->connection->f, gtalk_ringing_ack, p,
01819                      IKS_RULE_ID, p->ring, IKS_RULE_DONE);
01820    } else {
01821       ast_log(LOG_WARNING, "Whoa, already have a ring rule!\n");
01822    }
01823 
01824    gtalk_invite(p, p->them, p->us, p->sid, 1);
01825 
01826    return 0;
01827 }
01828 
01829 /*! \brief Hangup a call through the gtalk proxy channel */
01830 static int gtalk_hangup(struct ast_channel *ast)
01831 {
01832    struct gtalk_pvt *p = ast->tech_pvt;
01833    struct gtalk *client;
01834 
01835    ast_mutex_lock(&p->lock);
01836    client = p->parent;
01837    p->owner = NULL;
01838    ast->tech_pvt = NULL;
01839    if (!p->alreadygone) {
01840       gtalk_action(client, p, "terminate");
01841    }
01842    ast_mutex_unlock(&p->lock);
01843 
01844    gtalk_free_pvt(client, p);
01845    ast_module_unref(ast_module_info->self);
01846 
01847    return 0;
01848 }
01849 
01850 /*!\brief Part of PBX interface */
01851 static struct ast_channel *gtalk_request(const char *type, format_t format, const struct ast_channel *requestor, void *data, int *cause)
01852 {
01853    struct gtalk_pvt *p = NULL;
01854    struct gtalk *client = NULL;
01855    char *sender = NULL, *to = NULL, *s = NULL;
01856    struct ast_channel *chan = NULL;
01857 
01858    if (data) {
01859       s = ast_strdupa(data);
01860       if (s) {
01861          sender = strsep(&s, "/");
01862          if (sender && (sender[0] != '\0')) {
01863             to = strsep(&s, "/");
01864          }
01865          if (!to) {
01866             ast_log(LOG_ERROR, "Bad arguments in Gtalk Dialstring: %s\n", (char*) data);
01867             return NULL;
01868          }
01869       }
01870    }
01871 
01872    client = find_gtalk(to, sender);
01873    if (!client) {
01874       ast_log(LOG_WARNING, "Could not find recipient.\n");
01875       return NULL;
01876    }
01877    if (!strcasecmp(client->name, "guest")){
01878       /* the guest account is not tied to any configured XMPP client,
01879          let's set it now */
01880       if (client->connection) {
01881          ASTOBJ_UNREF(client->connection, ast_aji_client_destroy);
01882       }
01883       client->connection = ast_aji_get_client(sender);
01884       if (!client->connection) {
01885          ast_log(LOG_ERROR, "No XMPP client to talk to, us (partial JID) : %s\n", sender);
01886          ASTOBJ_UNREF(client, gtalk_member_destroy);
01887          return NULL;
01888       }
01889    }
01890 
01891    ASTOBJ_WRLOCK(client);
01892    p = gtalk_alloc(client, strchr(sender, '@') ? sender : client->connection->jid->full, strchr(to, '@') ? to : client->user, NULL);
01893    if (p) {
01894       chan = gtalk_new(client, p, AST_STATE_DOWN, to, requestor ? requestor->linkedid : NULL);
01895    }
01896    ASTOBJ_UNLOCK(client);
01897    return chan;
01898 }
01899 
01900 /*! \brief CLI command "gtalk show channels" */
01901 static char *gtalk_show_channels(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
01902 {
01903 #define FORMAT  "%-30.30s  %-30.30s  %-15.15s  %-5.5s %-5.5s \n"
01904    struct gtalk_pvt *p;
01905    struct ast_channel *chan;
01906    int numchans = 0;
01907    char them[AJI_MAX_JIDLEN];
01908    char *jid = NULL;
01909    char *resource = NULL;
01910 
01911    switch (cmd) {
01912    case CLI_INIT:
01913       e->command = "gtalk show channels";
01914       e->usage =
01915          "Usage: gtalk show channels\n"
01916          "       Shows current state of the Gtalk channels.\n";
01917       return NULL;
01918    case CLI_GENERATE:
01919       return NULL;
01920    }
01921 
01922    if (a->argc != 3)
01923       return CLI_SHOWUSAGE;
01924 
01925    ast_mutex_lock(&gtalklock);
01926    ast_cli(a->fd, FORMAT, "Channel", "Jabber ID", "Resource", "Read", "Write");
01927    ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
01928       ASTOBJ_WRLOCK(iterator);
01929       p = iterator->p;
01930       while(p) {
01931          chan = p->owner;
01932          ast_copy_string(them, p->them, sizeof(them));
01933          jid = them;
01934          resource = strchr(them, '/');
01935          if (!resource)
01936             resource = "None";
01937          else {
01938             *resource = '\0';
01939             resource ++;
01940          }
01941          if (chan)
01942             ast_cli(a->fd, FORMAT,
01943                chan->name,
01944                jid,
01945                resource,
01946                ast_getformatname(chan->readformat),
01947                ast_getformatname(chan->writeformat)
01948                );
01949          else
01950             ast_log(LOG_WARNING, "No available channel\n");
01951          numchans ++;
01952          p = p->next;
01953       }
01954       ASTOBJ_UNLOCK(iterator);
01955    });
01956 
01957    ast_mutex_unlock(&gtalklock);
01958 
01959    ast_cli(a->fd, "%d active gtalk channel%s\n", numchans, (numchans != 1) ? "s" : "");
01960    return CLI_SUCCESS;
01961 #undef FORMAT
01962 }
01963 
01964 /*! \brief CLI command "gtalk reload"
01965  *  \todo XXX TODO make this work. */
01966 #if 0
01967 static char *gtalk_do_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
01968 {
01969    switch (cmd) {
01970    case CLI_INIT:
01971       e->command = "gtalk reload";
01972       e->usage =
01973          "Usage: gtalk reload\n"
01974          "       Reload gtalk channel driver.\n";
01975       return NULL;
01976    case CLI_GENERATE:
01977       return NULL;
01978    }
01979 
01980    ast_verbose("IT DOES WORK!\n");
01981    return CLI_SUCCESS;
01982 }
01983 #endif
01984 
01985 static int gtalk_parser(void *data, ikspak *pak)
01986 {
01987    struct gtalk *client = ASTOBJ_REF((struct gtalk *) data);
01988    int res;
01989    iks *tmp;
01990 
01991    if (!strcasecmp(iks_name(pak->query), "jin:jingle") && (tmp = iks_next(pak->query)) && !strcasecmp(iks_name(tmp), "ses:session")) {
01992       ast_debug(1, "New method detected. Skipping jingle offer and using old gtalk method.\n");
01993       pak->query = tmp;
01994    }
01995 
01996    if (!strcmp(S_OR(iks_find_attrib(pak->x, "type"), ""), "error")) {
01997       ast_log(LOG_NOTICE, "Remote peer reported an error, trying to establish the call anyway\n");
01998    }
01999 
02000    if (ast_strlen_zero(iks_find_attrib(pak->query, "type"))) {
02001       ast_log(LOG_NOTICE, "No attribute \"type\" found.  Ignoring message.\n");
02002    } else if (!strcmp(iks_find_attrib(pak->query, "type"), "initiate")) {
02003       /* New call */
02004       gtalk_newcall(client, pak);
02005    } else if (!strcmp(iks_find_attrib(pak->query, "type"), "candidates") || !strcmp(iks_find_attrib(pak->query, "type"), "transport-info")) {
02006       ast_debug(3, "About to add candidate!\n");
02007       res = gtalk_add_candidate(client, pak);
02008       if (!res) {
02009          ast_log(LOG_WARNING, "Could not add any candidate\n");
02010       } else {
02011          ast_debug(3, "Candidate Added!\n");
02012       }
02013    } else if (!strcmp(iks_find_attrib(pak->query, "type"), "accept")) {
02014       gtalk_is_answered(client, pak);
02015    } else if (!strcmp(iks_find_attrib(pak->query, "type"), "transport-accept")) {
02016       gtalk_is_accepted(client, pak);
02017    } else if (!strcmp(iks_find_attrib(pak->query, "type"), "content-info") || iks_find_with_attrib(pak->x, "gtalk", "action", "session-info")) {
02018       gtalk_handle_dtmf(client, pak);
02019    } else if (!strcmp(iks_find_attrib(pak->query, "type"), "terminate")) {
02020       gtalk_hangup_farend(client, pak);
02021    } else if (!strcmp(iks_find_attrib(pak->query, "type"), "reject")) {
02022       gtalk_hangup_farend(client, pak);
02023    }
02024    ASTOBJ_UNREF(client, gtalk_member_destroy);
02025    return IKS_FILTER_EAT;
02026 }
02027 
02028 static int gtalk_create_member(char *label, struct ast_variable *var, int allowguest,
02029                         struct ast_codec_pref prefs, char *context,
02030                         struct gtalk *member)
02031 {
02032    struct aji_client *client;
02033 
02034    if (!member)
02035       ast_log(LOG_WARNING, "Out of memory.\n");
02036 
02037    ast_copy_string(member->name, label, sizeof(member->name));
02038    ast_copy_string(member->user, label, sizeof(member->user));
02039    ast_copy_string(member->context, context, sizeof(member->context));
02040    member->allowguest = allowguest;
02041    member->prefs = prefs;
02042    while (var) {
02043       if (!strcasecmp(var->name, "username"))
02044          ast_copy_string(member->user, var->value, sizeof(member->user));
02045       else if (!strcasecmp(var->name, "disallow"))
02046          ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 0);
02047       else if (!strcasecmp(var->name, "allow"))
02048          ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 1);
02049       else if (!strcasecmp(var->name, "context"))
02050          ast_copy_string(member->context, var->value, sizeof(member->context));
02051       else if (!strcasecmp(var->name, "parkinglot"))
02052          ast_copy_string(member->parkinglot, var->value, sizeof(member->parkinglot));
02053       else if (!strcasecmp(var->name, "connection")) {
02054          if ((client = ast_aji_get_client(var->value))) {
02055             member->connection = client;
02056             iks_filter_add_rule(client->f, gtalk_parser, member,
02057                       IKS_RULE_TYPE, IKS_PAK_IQ,
02058                       IKS_RULE_FROM_PARTIAL, member->user,
02059                       IKS_RULE_NS, GOOGLE_NS,
02060                       IKS_RULE_DONE);
02061          } else {
02062             ast_log(LOG_ERROR, "connection referenced not found!\n");
02063             return 0;
02064          }
02065       }
02066       var = var->next;
02067    }
02068    if (member->connection && member->user)
02069       member->buddy = ASTOBJ_CONTAINER_FIND(&member->connection->buddies, member->user);
02070    else {
02071       ast_log(LOG_ERROR, "No Connection or Username!\n");
02072    }
02073    return 1;
02074 }
02075 
02076 static int gtalk_load_config(void)
02077 {
02078    char *cat = NULL;
02079    struct ast_config *cfg = NULL;
02080    char context[AST_MAX_CONTEXT];
02081    char parkinglot[AST_MAX_CONTEXT];
02082    int allowguest = 1;
02083    struct ast_variable *var;
02084    struct gtalk *member;
02085    struct ast_codec_pref prefs;
02086    struct aji_client_container *clients;
02087    struct gtalk_candidate *global_candidates = NULL;
02088    struct hostent *hp;
02089    struct ast_hostent ahp;
02090    struct ast_flags config_flags = { 0 };
02091 
02092    cfg = ast_config_load(GOOGLE_CONFIG, config_flags);
02093    if (!cfg) {
02094       return 0;
02095    } else if (cfg == CONFIG_STATUS_FILEINVALID) {
02096       ast_log(LOG_ERROR, "Config file %s is in an invalid format.  Aborting.\n", GOOGLE_CONFIG);
02097       return 0;
02098    }
02099 
02100    /* Copy the default jb config over global_jbconf */
02101    memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
02102 
02103    /* set defaults */
02104    memset(&stunaddr, 0, sizeof(stunaddr));
02105 
02106    cat = ast_category_browse(cfg, NULL);
02107    for (var = ast_variable_browse(cfg, "general"); var; var = var->next) {
02108       /* handle jb conf */
02109       if (!ast_jb_read_conf(&global_jbconf, var->name, var->value))
02110          continue;
02111 
02112       if (!strcasecmp(var->name, "allowguest")) {
02113          allowguest = (ast_true(ast_variable_retrieve(cfg, "general", "allowguest"))) ? 1 : 0;
02114       } else if (!strcasecmp(var->name, "disallow")) {
02115          ast_parse_allow_disallow(&prefs, &global_capability, var->value, 0);
02116       } else if (!strcasecmp(var->name, "allow")) {
02117          ast_parse_allow_disallow(&prefs, &global_capability, var->value, 1);
02118       } else if (!strcasecmp(var->name, "context")) {
02119          ast_copy_string(context, var->value, sizeof(context));
02120       } else if (!strcasecmp(var->name, "externip")) {
02121          ast_copy_string(externip, var->value, sizeof(externip));
02122       } else if (!strcasecmp(var->name, "parkinglot")) {
02123          ast_copy_string(parkinglot, var->value, sizeof(parkinglot));
02124       } else if (!strcasecmp(var->name, "bindaddr")) {
02125          if (!(hp = ast_gethostbyname(var->value, &ahp))) {
02126             ast_log(LOG_WARNING, "Invalid address: %s\n", var->value);
02127          } else {
02128             memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
02129          }
02130       } else if (!strcasecmp(var->name, "stunaddr")) {
02131          stunaddr.sin_port = htons(STANDARD_STUN_PORT);
02132          if (ast_parse_arg(var->value, PARSE_INADDR, &stunaddr)) {
02133             ast_log(LOG_WARNING, "Invalid STUN server address: %s\n", var->value);
02134          }
02135       }
02136    }
02137    while (cat) {
02138       if (strcasecmp(cat, "general")) {
02139          var = ast_variable_browse(cfg, cat);
02140          member = ast_calloc(1, sizeof(*member));
02141          ASTOBJ_INIT(member);
02142          ASTOBJ_WRLOCK(member);
02143          if (!strcasecmp(cat, "guest")) {
02144             ast_copy_string(member->name, "guest", sizeof(member->name));
02145             ast_copy_string(member->user, "guest", sizeof(member->user));
02146             ast_copy_string(member->context, context, sizeof(member->context));
02147             ast_copy_string(member->parkinglot, parkinglot, sizeof(member->parkinglot));
02148             member->allowguest = allowguest;
02149             member->prefs = prefs;
02150             while (var) {
02151                if (!strcasecmp(var->name, "disallow")) {
02152                   ast_parse_allow_disallow(&member->prefs, &member->capability,
02153                                      var->value, 0);
02154                } else if (!strcasecmp(var->name, "allow")) {
02155                   ast_parse_allow_disallow(&member->prefs, &member->capability,
02156                                      var->value, 1);
02157                } else if (!strcasecmp(var->name, "context")) {
02158                   ast_copy_string(member->context, var->value,
02159                               sizeof(member->context));
02160                } else if (!strcasecmp(var->name, "parkinglot")) {
02161                   ast_copy_string(member->parkinglot, var->value,
02162                               sizeof(member->parkinglot));
02163                }
02164                var = var->next;
02165             }
02166             ASTOBJ_UNLOCK(member);
02167             clients = ast_aji_get_clients();
02168             if (clients) {
02169                ASTOBJ_CONTAINER_TRAVERSE(clients, 1, {
02170                   ASTOBJ_WRLOCK(iterator);
02171                   ASTOBJ_WRLOCK(member);
02172                   if (member->connection) {
02173                      ASTOBJ_UNREF(member->connection, ast_aji_client_destroy);
02174                   }
02175                   member->connection = NULL;
02176                   iks_filter_add_rule(iterator->f, gtalk_parser, member, IKS_RULE_TYPE, IKS_PAK_IQ, IKS_RULE_NS, GOOGLE_NS, IKS_RULE_DONE);
02177                   iks_filter_add_rule(iterator->f, gtalk_parser, member, IKS_RULE_TYPE, IKS_PAK_IQ, IKS_RULE_NS, GOOGLE_JINGLE_NS, IKS_RULE_DONE);
02178                   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);
02179                   ASTOBJ_UNLOCK(member);
02180                   ASTOBJ_UNLOCK(iterator);
02181                });
02182                ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
02183                ASTOBJ_UNREF(member, gtalk_member_destroy);
02184             } else {
02185                ASTOBJ_UNLOCK(member);
02186                ASTOBJ_UNREF(member, gtalk_member_destroy);
02187             }
02188          } else {
02189             ASTOBJ_UNLOCK(member);
02190             if (gtalk_create_member(cat, var, allowguest, prefs, context, member))
02191                ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
02192             ASTOBJ_UNREF(member, gtalk_member_destroy);
02193          }
02194       }
02195       cat = ast_category_browse(cfg, cat);
02196    }
02197 
02198    gtalk_update_externip();
02199    gtalk_free_candidates(global_candidates);
02200    return 1;
02201 }
02202 
02203 /*! \brief Load module into PBX, register channel */
02204 static int load_module(void)
02205 {
02206    struct ast_sockaddr bindaddr_tmp;
02207    struct ast_sockaddr ourip_tmp;
02208 
02209    char *jabber_loaded = ast_module_helper("", "res_jabber.so", 0, 0, 0, 0);
02210    free(jabber_loaded);
02211    if (!jabber_loaded) {
02212       /* If embedded, check for a different module name */
02213       jabber_loaded = ast_module_helper("", "res_jabber", 0, 0, 0, 0);
02214       free(jabber_loaded);
02215       if (!jabber_loaded) {
02216          ast_log(LOG_ERROR, "chan_gtalk.so depends upon res_jabber.so\n");
02217          return AST_MODULE_LOAD_DECLINE;
02218       }
02219    }
02220 
02221    ASTOBJ_CONTAINER_INIT(&gtalk_list);
02222    if (!gtalk_load_config()) {
02223       ast_log(LOG_ERROR, "Unable to read config file %s. Not loading module.\n", GOOGLE_CONFIG);
02224       return 0;
02225    }
02226 
02227    sched = sched_context_create();
02228    if (!sched) {
02229       ast_log(LOG_WARNING, "Unable to create schedule context\n");
02230    }
02231 
02232    io = io_context_create();
02233    if (!io) {
02234       ast_log(LOG_WARNING, "Unable to create I/O context\n");
02235    }
02236 
02237    ast_sockaddr_from_sin(&bindaddr_tmp, &bindaddr);
02238    if (gtalk_get_local_ip(&ourip_tmp)) {
02239       ast_log(LOG_WARNING, "Unable to get own IP address, Gtalk disabled\n");
02240       return 0;
02241    }
02242    __ourip.s_addr = htonl(ast_sockaddr_ipv4(&ourip_tmp));
02243 
02244    ast_rtp_glue_register(&gtalk_rtp_glue);
02245    ast_cli_register_multiple(gtalk_cli, ARRAY_LEN(gtalk_cli));
02246 
02247    /* Make sure we can register our channel type */
02248    if (ast_channel_register(&gtalk_tech)) {
02249       ast_log(LOG_ERROR, "Unable to register channel class %s\n", gtalk_tech.type);
02250       return -1;
02251    }
02252    return 0;
02253 }
02254 
02255 /*! \brief Reload module
02256  *  \todo XXX TODO make this work. */
02257 #if 0
02258 static int reload(void)
02259 {
02260    return 0;
02261 }
02262 #endif
02263 /*! \brief Unload the gtalk channel from Asterisk */
02264 static int unload_module(void)
02265 {
02266    struct gtalk_pvt *privates = NULL;
02267    ast_cli_unregister_multiple(gtalk_cli, ARRAY_LEN(gtalk_cli));
02268    /* First, take us out of the channel loop */
02269    ast_channel_unregister(&gtalk_tech);
02270    ast_rtp_glue_unregister(&gtalk_rtp_glue);
02271 
02272    if (!ast_mutex_lock(&gtalklock)) {
02273       /* Hangup all interfaces if they have an owner */
02274       ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
02275          ASTOBJ_WRLOCK(iterator);
02276          privates = iterator->p;
02277          while(privates) {
02278             if (privates->owner)
02279                ast_softhangup(privates->owner, AST_SOFTHANGUP_APPUNLOAD);
02280             privates = privates->next;
02281          }
02282          iterator->p = NULL;
02283          ASTOBJ_UNLOCK(iterator);
02284       });
02285       ast_mutex_unlock(&gtalklock);
02286    } else {
02287       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
02288       return -1;
02289    }
02290    ASTOBJ_CONTAINER_DESTROYALL(&gtalk_list, gtalk_member_destroy);
02291    ASTOBJ_CONTAINER_DESTROY(&gtalk_list);
02292    return 0;
02293 }
02294 
02295 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Gtalk Channel Driver",
02296       .load = load_module,
02297       .unload = unload_module,
02298       /* .reload = reload, */
02299       .load_pri = AST_MODPRI_CHANNEL_DRIVER,
02300       );

Generated on Sat Mar 10 01:54:08 2012 for Asterisk - The Open Source Telephony Project by  doxygen 1.4.7