Wed Apr 6 11:29:41 2011

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  ***/
00039 
00040 
00041 #include "asterisk.h"
00042 
00043 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 297957 $")
00044 
00045 #include <sys/socket.h>
00046 #include <fcntl.h>
00047 #include <netdb.h>
00048 #include <netinet/in.h>
00049 #include <arpa/inet.h>
00050 #include <sys/signal.h>
00051 #include <iksemel.h>
00052 #include <pthread.h>
00053 #include <ctype.h>
00054 
00055 #include "asterisk/lock.h"
00056 #include "asterisk/channel.h"
00057 #include "asterisk/config.h"
00058 #include "asterisk/module.h"
00059 #include "asterisk/pbx.h"
00060 #include "asterisk/sched.h"
00061 #include "asterisk/io.h"
00062 #include "asterisk/rtp_engine.h"
00063 #include "asterisk/stun.h"
00064 #include "asterisk/acl.h"
00065 #include "asterisk/callerid.h"
00066 #include "asterisk/file.h"
00067 #include "asterisk/cli.h"
00068 #include "asterisk/app.h"
00069 #include "asterisk/musiconhold.h"
00070 #include "asterisk/manager.h"
00071 #include "asterisk/stringfields.h"
00072 #include "asterisk/utils.h"
00073 #include "asterisk/causes.h"
00074 #include "asterisk/astobj.h"
00075 #include "asterisk/abstract_jb.h"
00076 #include "asterisk/jabber.h"
00077 #include "asterisk/jingle.h"
00078 
00079 #define GOOGLE_CONFIG "gtalk.conf"
00080 
00081 /*! Global jitterbuffer configuration - by default, jb is disabled */
00082 static struct ast_jb_conf default_jbconf =
00083 {
00084    .flags = 0,
00085    .max_size = -1,
00086    .resync_threshold = -1,
00087    .impl = "",
00088    .target_extra = -1,
00089 };
00090 static struct ast_jb_conf global_jbconf;
00091 
00092 enum gtalk_protocol {
00093    AJI_PROTOCOL_UDP = 1,
00094    AJI_PROTOCOL_SSLTCP = 2,
00095 };
00096 
00097 enum gtalk_connect_type {
00098    AJI_CONNECT_STUN = 1,
00099    AJI_CONNECT_LOCAL = 2,
00100    AJI_CONNECT_RELAY = 3,
00101 };
00102 
00103 struct gtalk_pvt {
00104    ast_mutex_t lock;                /*!< Channel private lock */
00105    time_t laststun;
00106    struct gtalk *parent;            /*!< Parent client */
00107    char sid[100];
00108    char us[AJI_MAX_JIDLEN];
00109    char them[AJI_MAX_JIDLEN];
00110    char ring[10];                   /*!< Message ID of ring */
00111    iksrule *ringrule;               /*!< Rule for matching RING request */
00112    int initiator;                   /*!< If we're the initiator */
00113    int alreadygone;
00114    int capability;
00115    struct ast_codec_pref prefs;
00116    struct gtalk_candidate *theircandidates;
00117    struct gtalk_candidate *ourcandidates;
00118    char cid_num[80];                /*!< Caller ID num */
00119    char cid_name[80];               /*!< Caller ID name */
00120    char exten[80];                  /*!< Called extension */
00121    struct ast_channel *owner;       /*!< Master Channel */
00122    struct ast_rtp_instance *rtp;             /*!< RTP audio session */
00123    struct ast_rtp_instance *vrtp;            /*!< RTP video session */
00124    format_t jointcapability;             /*!< Supported capability at both ends (codecs ) */
00125    format_t peercapability;
00126    struct gtalk_pvt *next; /* Next entity */
00127 };
00128 
00129 struct gtalk_candidate {
00130    char name[100];
00131    enum gtalk_protocol protocol;
00132    double preference;
00133    char username[100];
00134    char password[100];
00135    enum gtalk_connect_type type;
00136    char network[6];
00137    int generation;
00138    char ip[16];
00139    int port;
00140    int receipt;
00141    struct gtalk_candidate *next;
00142 };
00143 
00144 struct gtalk {
00145    ASTOBJ_COMPONENTS(struct gtalk);
00146    struct aji_client *connection;
00147    struct aji_buddy *buddy;
00148    struct gtalk_pvt *p;
00149    struct ast_codec_pref prefs;
00150    int amaflags;        /*!< AMA Flags */
00151    char user[AJI_MAX_JIDLEN];
00152    char context[AST_MAX_CONTEXT];
00153    char parkinglot[AST_MAX_CONTEXT];   /*!<  Parkinglot */
00154    char accountcode[AST_MAX_ACCOUNT_CODE];   /*!< Account code */
00155    format_t capability;
00156    ast_group_t callgroup;  /*!< Call group */
00157    ast_group_t pickupgroup;   /*!< Pickup group */
00158    int callingpres;     /*!< Calling presentation */
00159    int allowguest;
00160    char language[MAX_LANGUAGE];  /*!<  Default language for prompts */
00161    char musicclass[MAX_MUSICCLASS]; /*!<  Music on Hold class */
00162 };
00163 
00164 struct gtalk_container {
00165    ASTOBJ_CONTAINER_COMPONENTS(struct gtalk);
00166 };
00167 
00168 static const char desc[] = "Gtalk Channel";
00169 
00170 static format_t global_capability = AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_GSM | AST_FORMAT_H263;
00171 
00172 AST_MUTEX_DEFINE_STATIC(gtalklock); /*!< Protect the interface list (of gtalk_pvt's) */
00173 
00174 /* Forward declarations */
00175 static struct ast_channel *gtalk_request(const char *type, format_t format, const struct ast_channel *requestor, void *data, int *cause);
00176 /*static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration);*/
00177 static int gtalk_sendtext(struct ast_channel *ast, const char *text);
00178 static int gtalk_digit_begin(struct ast_channel *ast, char digit);
00179 static int gtalk_digit_end(struct ast_channel *ast, char digit, unsigned int duration);
00180 static int gtalk_call(struct ast_channel *ast, char *dest, int timeout);
00181 static int gtalk_hangup(struct ast_channel *ast);
00182 static int gtalk_answer(struct ast_channel *ast);
00183 static int gtalk_action(struct gtalk *client, struct gtalk_pvt *p, const char *action);
00184 static void gtalk_free_pvt(struct gtalk *client, struct gtalk_pvt *p);
00185 static int gtalk_newcall(struct gtalk *client, ikspak *pak);
00186 static struct ast_frame *gtalk_read(struct ast_channel *ast);
00187 static int gtalk_write(struct ast_channel *ast, struct ast_frame *f);
00188 static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen);
00189 static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
00190 static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen);
00191 static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid);
00192 static int gtalk_update_stun(struct gtalk *client, struct gtalk_pvt *p);
00193 /* static char *gtalk_do_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a); */
00194 static char *gtalk_show_channels(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
00195 static int gtalk_update_externip(void);
00196 static int gtalk_parser(void *data, ikspak *pak);
00197 static int gtalk_create_candidates(struct gtalk *client, struct gtalk_pvt *p, char *sid, char *from, char *to);
00198 
00199 /*! \brief PBX interface structure for channel registration */
00200 static const struct ast_channel_tech gtalk_tech = {
00201    .type = "Gtalk",
00202    .description = "Gtalk Channel Driver",
00203    .capabilities = AST_FORMAT_AUDIO_MASK,
00204    .requester = gtalk_request,
00205    .send_text = gtalk_sendtext,
00206    .send_digit_begin = gtalk_digit_begin,
00207    .send_digit_end = gtalk_digit_end,
00208    /* XXX TODO native bridging is causing odd problems with DTMF pass-through with
00209     * the gtalk servers. Enable native bridging once the source of this problem has
00210     * been identified.
00211    .bridge = ast_rtp_instance_bridge, */
00212    .call = gtalk_call,
00213    .hangup = gtalk_hangup,
00214    .answer = gtalk_answer,
00215    .read = gtalk_read,
00216    .write = gtalk_write,
00217    .exception = gtalk_read,
00218    .indicate = gtalk_indicate,
00219    .fixup = gtalk_fixup,
00220    .send_html = gtalk_sendhtml,
00221    .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER
00222 };
00223 
00224 static struct sockaddr_in bindaddr = { 0, }; /*!< The address we bind to */
00225 
00226 static struct sched_context *sched; /*!< The scheduling context */
00227 static struct io_context *io; /*!< The IO context */
00228 static struct in_addr __ourip;
00229 
00230 static struct ast_cli_entry gtalk_cli[] = {
00231 /* AST_CLI_DEFINE(gtalk_do_reload, "Reload GoogleTalk configuration"), XXX TODO reloads are not possible yet. */
00232    AST_CLI_DEFINE(gtalk_show_channels, "Show GoogleTalk channels"),
00233 };
00234 
00235 static char externip[16];
00236 static struct sockaddr_in stunaddr; /*!< the stun server we get the externip from */
00237 
00238 static struct gtalk_container gtalk_list;
00239 
00240 static void gtalk_member_destroy(struct gtalk *obj)
00241 {
00242    ast_free(obj);
00243 }
00244 
00245 static struct gtalk *find_gtalk(char *name, char *connection)
00246 {
00247    struct gtalk *gtalk = NULL;
00248    char *domain = NULL , *s = NULL;
00249 
00250    if (strchr(connection, '@')) {
00251       s = ast_strdupa(connection);
00252       domain = strsep(&s, "@");
00253       ast_verbose("OOOOH domain = %s\n", domain);
00254    }
00255    gtalk = ASTOBJ_CONTAINER_FIND(&gtalk_list, name);
00256    if (!gtalk && strchr(name, '@'))
00257       gtalk = ASTOBJ_CONTAINER_FIND_FULL(&gtalk_list, name, user,,, strcasecmp);
00258 
00259    if (!gtalk) {
00260       /* guest call */
00261       ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
00262          ASTOBJ_RDLOCK(iterator);
00263          if (!strcasecmp(iterator->name, "guest")) {
00264             gtalk = iterator;
00265          }
00266          ASTOBJ_UNLOCK(iterator);
00267 
00268          if (gtalk)
00269             break;
00270       });
00271 
00272    }
00273    return gtalk;
00274 }
00275 
00276 
00277 static int add_codec_to_answer(const struct gtalk_pvt *p, int codec, iks *dcodecs)
00278 {
00279    int res = 0;
00280    char *format = ast_getformatname(codec);
00281 
00282    if (!strcasecmp("ulaw", format)) {
00283       iks *payload_eg711u, *payload_pcmu;
00284       payload_pcmu = iks_new("payload-type");
00285       payload_eg711u = iks_new("payload-type");
00286 
00287       if(!payload_eg711u || !payload_pcmu) {
00288          iks_delete(payload_pcmu);
00289          iks_delete(payload_eg711u);
00290          ast_log(LOG_WARNING,"Failed to allocate iks node");
00291          return -1;
00292       }
00293       iks_insert_attrib(payload_pcmu, "id", "0");
00294       iks_insert_attrib(payload_pcmu, "name", "PCMU");
00295       iks_insert_attrib(payload_pcmu, "clockrate","8000");
00296       iks_insert_attrib(payload_pcmu, "bitrate","64000");
00297       iks_insert_attrib(payload_eg711u, "id", "100");
00298       iks_insert_attrib(payload_eg711u, "name", "EG711U");
00299       iks_insert_attrib(payload_eg711u, "clockrate","8000");
00300       iks_insert_attrib(payload_eg711u, "bitrate","64000");
00301       iks_insert_node(dcodecs, payload_pcmu);
00302       iks_insert_node(dcodecs, payload_eg711u);
00303       res ++;
00304    }
00305    if (!strcasecmp("alaw", format)) {
00306       iks *payload_eg711a, *payload_pcma;
00307       payload_pcma = iks_new("payload-type");
00308       payload_eg711a = iks_new("payload-type");
00309       if(!payload_eg711a || !payload_pcma) {
00310          iks_delete(payload_eg711a);
00311          iks_delete(payload_pcma);
00312          ast_log(LOG_WARNING,"Failed to allocate iks node");
00313          return -1;
00314       }
00315       iks_insert_attrib(payload_pcma, "id", "8");
00316       iks_insert_attrib(payload_pcma, "name", "PCMA");
00317       iks_insert_attrib(payload_pcma, "clockrate","8000");
00318       iks_insert_attrib(payload_pcma, "bitrate","64000");
00319       payload_eg711a = iks_new("payload-type");
00320       iks_insert_attrib(payload_eg711a, "id", "101");
00321       iks_insert_attrib(payload_eg711a, "name", "EG711A");
00322       iks_insert_attrib(payload_eg711a, "clockrate","8000");
00323       iks_insert_attrib(payload_eg711a, "bitrate","64000");
00324       iks_insert_node(dcodecs, payload_pcma);
00325       iks_insert_node(dcodecs, payload_eg711a);
00326       res ++;
00327    }
00328    if (!strcasecmp("ilbc", format)) {
00329       iks *payload_ilbc = iks_new("payload-type");
00330       if(!payload_ilbc) {
00331          ast_log(LOG_WARNING,"Failed to allocate iks node");
00332          return -1;
00333       }
00334       iks_insert_attrib(payload_ilbc, "id", "97");
00335       iks_insert_attrib(payload_ilbc, "name", "iLBC");
00336       iks_insert_attrib(payload_ilbc, "clockrate","8000");
00337       iks_insert_attrib(payload_ilbc, "bitrate","13300");
00338       iks_insert_node(dcodecs, payload_ilbc);
00339       res ++;
00340    }
00341    if (!strcasecmp("g723", format)) {
00342       iks *payload_g723 = iks_new("payload-type");
00343       if(!payload_g723) {
00344          ast_log(LOG_WARNING,"Failed to allocate iks node");
00345          return -1;
00346       }
00347       iks_insert_attrib(payload_g723, "id", "4");
00348       iks_insert_attrib(payload_g723, "name", "G723");
00349       iks_insert_attrib(payload_g723, "clockrate","8000");
00350       iks_insert_attrib(payload_g723, "bitrate","6300");
00351       iks_insert_node(dcodecs, payload_g723);
00352       res ++;
00353    }
00354    if (!strcasecmp("speex", format)) {
00355       iks *payload_speex = iks_new("payload-type");
00356       if(!payload_speex) {
00357          ast_log(LOG_WARNING,"Failed to allocate iks node");
00358          return -1;
00359       }
00360       iks_insert_attrib(payload_speex, "id", "110");
00361       iks_insert_attrib(payload_speex, "name", "speex");
00362       iks_insert_attrib(payload_speex, "clockrate","8000");
00363       iks_insert_attrib(payload_speex, "bitrate","11000");
00364       iks_insert_node(dcodecs, payload_speex);
00365       res++;
00366    }
00367    if (!strcasecmp("gsm", format)) {
00368       iks *payload_gsm = iks_new("payload-type");
00369       if(!payload_gsm) {
00370          ast_log(LOG_WARNING,"Failed to allocate iks node");
00371          return -1;
00372       }
00373       iks_insert_attrib(payload_gsm, "id", "103");
00374       iks_insert_attrib(payload_gsm, "name", "gsm");
00375       iks_insert_node(dcodecs, payload_gsm);
00376       res++;
00377    }
00378 
00379    return res;
00380 }
00381 
00382 static int gtalk_invite(struct gtalk_pvt *p, char *to, char *from, char *sid, int initiator)
00383 {
00384    struct gtalk *client = p->parent;
00385    iks *iq, *gtalk, *dcodecs, *payload_telephone, *transport;
00386    int x;
00387    int pref_codec = 0;
00388    int alreadysent = 0;
00389    int codecs_num = 0;
00390    char *lowerto = NULL;
00391 
00392    iq = iks_new("iq");
00393    gtalk = iks_new("session");
00394    dcodecs = iks_new("description");
00395    transport = iks_new("transport");
00396    payload_telephone = iks_new("payload-type");
00397    if (!(iq && gtalk && dcodecs && transport && payload_telephone)){
00398       iks_delete(iq);
00399       iks_delete(gtalk);
00400       iks_delete(dcodecs);
00401       iks_delete(transport);
00402       iks_delete(payload_telephone);
00403 
00404       ast_log(LOG_ERROR, "Could not allocate iksemel nodes\n");
00405       return 0;
00406    }
00407    iks_insert_attrib(dcodecs, "xmlns", GOOGLE_AUDIO_NS);
00408    iks_insert_attrib(dcodecs, "xml:lang", "en");
00409 
00410    for (x = 0; x < 64; x++) {
00411       if (!(pref_codec = ast_codec_pref_index(&client->prefs, x)))
00412          break;
00413       if (!(client->capability & pref_codec))
00414          continue;
00415       if (alreadysent & pref_codec)
00416          continue;
00417       codecs_num = add_codec_to_answer(p, pref_codec, dcodecs);
00418       alreadysent |= pref_codec;
00419    }
00420 
00421    if (codecs_num) {
00422       /* only propose DTMF within an audio session */
00423       iks_insert_attrib(payload_telephone, "id", "101");
00424       iks_insert_attrib(payload_telephone, "name", "telephone-event");
00425       iks_insert_attrib(payload_telephone, "clockrate", "8000");
00426    }
00427    iks_insert_attrib(transport,"xmlns",GOOGLE_TRANSPORT_NS);
00428 
00429    iks_insert_attrib(iq, "type", "set");
00430    iks_insert_attrib(iq, "to", to);
00431    iks_insert_attrib(iq, "from", from);
00432    iks_insert_attrib(iq, "id", client->connection->mid);
00433    ast_aji_increment_mid(client->connection->mid);
00434 
00435    iks_insert_attrib(gtalk, "xmlns", GOOGLE_NS);
00436    iks_insert_attrib(gtalk, "type",initiator ? "initiate": "accept");
00437    /* put the initiator attribute to lower case if we receive the call
00438     * otherwise GoogleTalk won't establish the session */
00439    if (!initiator) {
00440            char c;
00441            char *t = lowerto = ast_strdupa(to);
00442       while (((c = *t) != '/') && (*t++ = tolower(c)));
00443    }
00444    iks_insert_attrib(gtalk, "initiator", initiator ? from : lowerto);
00445    iks_insert_attrib(gtalk, "id", sid);
00446    iks_insert_node(iq, gtalk);
00447    iks_insert_node(gtalk, dcodecs);
00448    iks_insert_node(dcodecs, payload_telephone);
00449 
00450    ast_aji_send(client->connection, iq);
00451 
00452    iks_delete(payload_telephone);
00453    iks_delete(transport);
00454    iks_delete(dcodecs);
00455    iks_delete(gtalk);
00456    iks_delete(iq);
00457    return 1;
00458 }
00459 
00460 static int gtalk_ringing_ack(void *data, ikspak *pak)
00461 {
00462    struct gtalk_pvt *p = data;
00463    struct ast_channel *owner;
00464 
00465    ast_mutex_lock(&p->lock);
00466 
00467    if (p->ringrule) {
00468       iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
00469    }
00470    p->ringrule = NULL;
00471 
00472    /* this may be a redirect */
00473    if (!strcmp(S_OR(iks_find_attrib(pak->x, "type"), ""), "error")) {
00474       char *name = NULL;
00475       char *redirect = NULL;
00476       iks *traversenodes = NULL;
00477       traversenodes = pak->query;
00478       while (traversenodes) {
00479          if (!(name = iks_name(traversenodes))) {
00480             break;
00481          }
00482          if (!strcasecmp(name, "error") &&
00483             (redirect = iks_find_cdata(traversenodes, "redirect")) &&
00484             (redirect = strstr(redirect, "xmpp:"))) {
00485             redirect += 5;
00486             ast_log(LOG_DEBUG, "redirect %s\n", redirect);
00487             ast_copy_string(p->them, redirect, sizeof(p->them));
00488 
00489             gtalk_invite(p, p->them, p->us, p->sid, 1);
00490             break;
00491          }
00492          traversenodes = iks_next_tag(traversenodes);
00493       }
00494    }
00495    gtalk_create_candidates(p->parent, p, p->sid, p->them, p->us);
00496    owner = p->owner;
00497    ast_mutex_unlock(&p->lock);
00498 
00499    if (owner) {
00500       ast_queue_control(owner, AST_CONTROL_RINGING);
00501    }
00502 
00503    return IKS_FILTER_EAT;
00504 }
00505 
00506 static int gtalk_answer(struct ast_channel *ast)
00507 {
00508    struct gtalk_pvt *p = ast->tech_pvt;
00509    int res = 0;
00510 
00511    ast_debug(1, "Answer!\n");
00512    ast_mutex_lock(&p->lock);
00513    gtalk_invite(p, p->them, p->us,p->sid, 0);
00514    manager_event(EVENT_FLAG_SYSTEM, "ChannelUpdate", "Channel: %s\r\nChanneltype: %s\r\nGtalk-SID: %s\r\n",
00515       ast->name, "GTALK", p->sid);
00516    ast_mutex_unlock(&p->lock);
00517    return res;
00518 }
00519 
00520 static enum ast_rtp_glue_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp_instance **instance)
00521 {
00522    struct gtalk_pvt *p = chan->tech_pvt;
00523    enum ast_rtp_glue_result res = AST_RTP_GLUE_RESULT_FORBID;
00524 
00525    if (!p)
00526       return res;
00527 
00528    ast_mutex_lock(&p->lock);
00529    if (p->rtp){
00530       ao2_ref(p->rtp, +1);
00531       *instance = p->rtp;
00532       res = AST_RTP_GLUE_RESULT_LOCAL;
00533    }
00534    ast_mutex_unlock(&p->lock);
00535 
00536    return res;
00537 }
00538 
00539 static format_t gtalk_get_codec(struct ast_channel *chan)
00540 {
00541    struct gtalk_pvt *p = chan->tech_pvt;
00542    return p->peercapability;
00543 }
00544 
00545 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)
00546 {
00547    struct gtalk_pvt *p;
00548 
00549    p = chan->tech_pvt;
00550    if (!p)
00551       return -1;
00552    ast_mutex_lock(&p->lock);
00553 
00554 /* if (rtp)
00555       ast_rtp_get_peer(rtp, &p->redirip);
00556    else
00557       memset(&p->redirip, 0, sizeof(p->redirip));
00558    p->redircodecs = codecs; */
00559 
00560    /* Reset lastrtprx timer */
00561    ast_mutex_unlock(&p->lock);
00562    return 0;
00563 }
00564 
00565 static struct ast_rtp_glue gtalk_rtp_glue = {
00566    .type = "Gtalk",
00567    .get_rtp_info = gtalk_get_rtp_peer,
00568    .get_codec = gtalk_get_codec,
00569    .update_peer = gtalk_set_rtp_peer,
00570 };
00571 
00572 static int gtalk_response(struct gtalk *client, char *from, ikspak *pak, const char *reasonstr, const char *reasonstr2)
00573 {
00574    iks *response = NULL, *error = NULL, *reason = NULL;
00575    int res = -1;
00576 
00577    response = iks_new("iq");
00578    if (response) {
00579       iks_insert_attrib(response, "type", "result");
00580       iks_insert_attrib(response, "from", from);
00581       iks_insert_attrib(response, "to", S_OR(iks_find_attrib(pak->x, "from"), ""));
00582       iks_insert_attrib(response, "id", S_OR(iks_find_attrib(pak->x, "id"), ""));
00583       if (reasonstr) {
00584          error = iks_new("error");
00585          if (error) {
00586             iks_insert_attrib(error, "type", "cancel");
00587             reason = iks_new(reasonstr);
00588             if (reason)
00589                iks_insert_node(error, reason);
00590             iks_insert_node(response, error);
00591          }
00592       }
00593       ast_aji_send(client->connection, response);
00594       res = 0;
00595    }
00596 
00597    iks_delete(reason);
00598    iks_delete(error);
00599    iks_delete(response);
00600 
00601    return res;
00602 }
00603 
00604 static int gtalk_is_answered(struct gtalk *client, ikspak *pak)
00605 {
00606    struct gtalk_pvt *tmp = NULL;
00607    char *from;
00608    iks *codec;
00609    char s1[BUFSIZ], s2[BUFSIZ], s3[BUFSIZ];
00610    int peernoncodeccapability;
00611 
00612    ast_log(LOG_DEBUG, "The client is %s\n", client->name);
00613 
00614    /* Make sure our new call does exist */
00615    for (tmp = client->p; tmp; tmp = tmp->next) {
00616       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
00617          break;
00618       } else if (iks_find_with_attrib(pak->x, "ses:session", "id", tmp->sid)) {
00619          break;
00620       }
00621    }
00622 
00623    if (!tmp) {
00624       ast_log(LOG_WARNING, "Could not find session in iq\n");
00625       return -1;
00626    }
00627 
00628    /* codec points to the first <payload-type/> tag */
00629    codec = iks_first_tag(iks_first_tag(iks_first_tag(pak->x)));
00630    while (codec) {
00631       char *codec_id = iks_find_attrib(codec, "id");
00632       char *codec_name = iks_find_attrib(codec, "name");
00633       if (!codec_id || !codec_name) {
00634          codec = iks_next_tag(codec);
00635          continue;
00636       }
00637 
00638       ast_rtp_codecs_payloads_set_m_type(
00639          ast_rtp_instance_get_codecs(tmp->rtp),
00640          tmp->rtp,
00641          atoi(codec_id));
00642       ast_rtp_codecs_payloads_set_rtpmap_type(
00643          ast_rtp_instance_get_codecs(tmp->rtp),
00644          tmp->rtp,
00645          atoi(codec_id),
00646          "audio",
00647          codec_name,
00648          0);
00649       codec = iks_next_tag(codec);
00650    }
00651 
00652    /* Now gather all of the codecs that we are asked for */
00653    ast_rtp_codecs_payload_formats(ast_rtp_instance_get_codecs(tmp->rtp), &tmp->peercapability, &peernoncodeccapability);
00654 
00655    /* at this point, we received an awser from the remote Gtalk client,
00656       which allows us to compare capabilities */
00657    tmp->jointcapability = tmp->capability & tmp->peercapability;
00658    if (!tmp->jointcapability) {
00659       ast_log(LOG_WARNING, "Capabilities don't match : us - %s, peer - %s, combined - %s \n", ast_getformatname_multiple(s1, BUFSIZ, tmp->capability),
00660          ast_getformatname_multiple(s2, BUFSIZ, tmp->peercapability),
00661          ast_getformatname_multiple(s3, BUFSIZ, tmp->jointcapability));
00662       /* close session if capabilities don't match */
00663       ast_queue_hangup(tmp->owner);
00664 
00665       return -1;
00666 
00667    }
00668 
00669    from = iks_find_attrib(pak->x, "to");
00670    if (!from) {
00671       from = client->connection->jid->full;
00672    }
00673 
00674    if (tmp->owner) {
00675       ast_queue_control(tmp->owner, AST_CONTROL_ANSWER);
00676    }
00677    gtalk_update_stun(tmp->parent, tmp);
00678    gtalk_response(client, from, pak, NULL, NULL);
00679    return 1;
00680 }
00681 
00682 static int gtalk_is_accepted(struct gtalk *client, ikspak *pak)
00683 {
00684    struct gtalk_pvt *tmp;
00685    char *from;
00686 
00687    ast_log(LOG_DEBUG, "The client is %s\n", client->name);
00688    /* find corresponding call */
00689    for (tmp = client->p; tmp; tmp = tmp->next) {
00690       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
00691          break;
00692       }
00693    }
00694 
00695    from = iks_find_attrib(pak->x, "to");
00696    if (!from) {
00697       from = client->connection->jid->full;
00698    }
00699 
00700    if (tmp) {
00701       gtalk_update_stun(tmp->parent, tmp);
00702    } else {
00703       ast_log(LOG_NOTICE, "Whoa, didn't find call during accept?!\n");
00704    }
00705 
00706    /* answer 'iq' packet to let the remote peer know that we're alive */
00707    gtalk_response(client, from, pak, NULL, NULL);
00708    return 1;
00709 }
00710 
00711 static int gtalk_handle_dtmf(struct gtalk *client, ikspak *pak)
00712 {
00713    struct gtalk_pvt *tmp;
00714    iks *dtmfnode = NULL, *dtmfchild = NULL;
00715    char *dtmf;
00716    char *from;
00717    /* Make sure our new call doesn't exist yet */
00718    for (tmp = client->p; tmp; tmp = tmp->next) {
00719       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) || iks_find_with_attrib(pak->x, "gtalk", "sid", tmp->sid))
00720          break;
00721    }
00722    from = iks_find_attrib(pak->x, "to");
00723    if (!from) {
00724       from = client->connection->jid->full;
00725    }
00726 
00727    if (tmp) {
00728       if(iks_find_with_attrib(pak->x, "dtmf-method", "method", "rtp")) {
00729          gtalk_response(client, from, pak,
00730                "feature-not-implemented xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'",
00731                "unsupported-dtmf-method xmlns='http://jabber.org/protocol/gtalk/info/dtmf#errors'");
00732          return -1;
00733       }
00734       if ((dtmfnode = iks_find(pak->x, "dtmf"))) {
00735          if((dtmf = iks_find_attrib(dtmfnode, "code"))) {
00736             if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-up")) {
00737                struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
00738                f.subclass.integer = dtmf[0];
00739                ast_queue_frame(tmp->owner, &f);
00740                ast_verbose("GOOGLE! DTMF-relay event received: %c\n", (int) f.subclass.integer);
00741             } else if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-down")) {
00742                struct ast_frame f = {AST_FRAME_DTMF_END, };
00743                f.subclass.integer = dtmf[0];
00744                ast_queue_frame(tmp->owner, &f);
00745                ast_verbose("GOOGLE! DTMF-relay event received: %c\n", (int) f.subclass.integer);
00746             } else if(iks_find_attrib(pak->x, "dtmf")) { /* 250 millasecond default */
00747                struct ast_frame f = {AST_FRAME_DTMF, };
00748                f.subclass.integer = dtmf[0];
00749                ast_queue_frame(tmp->owner, &f);
00750                ast_verbose("GOOGLE! DTMF-relay event received: %c\n", (int) f.subclass.integer);
00751             }
00752          }
00753       } else if ((dtmfnode = iks_find_with_attrib(pak->x, "gtalk", "action", "session-info"))) {
00754          if((dtmfchild = iks_find(dtmfnode, "dtmf"))) {
00755             if((dtmf = iks_find_attrib(dtmfchild, "code"))) {
00756                if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-up")) {
00757                   struct ast_frame f = {AST_FRAME_DTMF_END, };
00758                   f.subclass.integer = dtmf[0];
00759                   ast_queue_frame(tmp->owner, &f);
00760                   ast_verbose("GOOGLE! DTMF-relay event received: %c\n", (int) f.subclass.integer);
00761                } else if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-down")) {
00762                   struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
00763                   f.subclass.integer = dtmf[0];
00764                   ast_queue_frame(tmp->owner, &f);
00765                   ast_verbose("GOOGLE! DTMF-relay event received: %c\n", (int) f.subclass.integer);
00766                }
00767             }
00768          }
00769       }
00770       gtalk_response(client, from, pak, NULL, NULL);
00771       return 1;
00772    } else {
00773       ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
00774    }
00775 
00776    gtalk_response(client, from, pak, NULL, NULL);
00777    return 1;
00778 }
00779 
00780 static int gtalk_hangup_farend(struct gtalk *client, ikspak *pak)
00781 {
00782    struct gtalk_pvt *tmp;
00783    char *from;
00784 
00785    ast_debug(1, "The client is %s\n", client->name);
00786    /* Make sure our new call doesn't exist yet */
00787    for (tmp = client->p; tmp; tmp = tmp->next) {
00788       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) ||
00789          (iks_find_attrib(pak->query, "id") && !strcmp(iks_find_attrib(pak->query, "id"), tmp->sid))) {
00790          break;
00791       }
00792    }
00793    from = iks_find_attrib(pak->x, "to");
00794    if (!from) {
00795       from = client->connection->jid->full;
00796    }
00797 
00798    if (tmp) {
00799       tmp->alreadygone = 1;
00800       if (tmp->owner) {
00801          ast_queue_hangup(tmp->owner);
00802       }
00803    } else {
00804       ast_log(LOG_NOTICE, "Whoa, didn't find call during hangup!\n");
00805    }
00806    gtalk_response(client, from, pak, NULL, NULL);
00807    return 1;
00808 }
00809 
00810 static int gtalk_get_local_ip(struct ast_sockaddr *ourip)
00811 {
00812    struct ast_sockaddr root;
00813    struct ast_sockaddr bindaddr_tmp;
00814    struct ast_sockaddr *addrs;
00815    int addrs_cnt;
00816 
00817    /* If bind address is not 0.0.0.0, then bindaddr is our local ip. */
00818    ast_sockaddr_from_sin(&bindaddr_tmp, &bindaddr);
00819    if (!ast_sockaddr_is_any(&bindaddr_tmp)) {
00820       ast_sockaddr_copy(ourip, &bindaddr_tmp);
00821       return 0;
00822    }
00823 
00824    /* If no bind address was provided, lets see what ip we would use to connect to google.com and use that.
00825     * If you can't resolve google.com from your network, then this module is useless for you anyway. */
00826    if ((addrs_cnt = ast_sockaddr_resolve(&addrs, "google.com", PARSE_PORT_FORBID, AF_INET)) > 0) {
00827       ast_sockaddr_copy(&root, &addrs[0]);
00828       ast_free(addrs);
00829       if (!ast_ouraddrfor(&root, ourip)) {
00830          return 0;
00831       }
00832    }
00833 
00834    /* As a last resort, use this function to find our local address. */
00835    return ast_find_ourip(ourip, &bindaddr_tmp, AF_INET);
00836 }
00837 
00838 static int gtalk_create_candidates(struct gtalk *client, struct gtalk_pvt *p, char *sid, char *from, char *to)
00839 {
00840    struct gtalk_candidate *tmp;
00841    struct aji_client *c = client->connection;
00842    struct gtalk_candidate *ours1 = NULL, *ours2 = NULL;
00843    struct sockaddr_in sin = { 0, };
00844    struct ast_sockaddr sin_tmp;
00845    struct ast_sockaddr us;
00846    iks *iq, *gtalk, *candidate, *transport;
00847    char user[17], pass[17], preference[5], port[7];
00848    char *lowerfrom = NULL;
00849 
00850    iq = iks_new("iq");
00851    gtalk = iks_new("session");
00852    candidate = iks_new("candidate");
00853    transport = iks_new("transport");
00854    if (!iq || !gtalk || !candidate || !transport) {
00855       ast_log(LOG_ERROR, "Memory allocation error\n");
00856       goto safeout;
00857    }
00858    ours1 = ast_calloc(1, sizeof(*ours1));
00859    ours2 = ast_calloc(1, sizeof(*ours2));
00860    if (!ours1 || !ours2)
00861       goto safeout;
00862 
00863    iks_insert_attrib(transport, "xmlns",GOOGLE_TRANSPORT_NS);
00864    iks_insert_node(iq, gtalk);
00865    iks_insert_node(gtalk,candidate);
00866    iks_insert_node(gtalk,transport);
00867 
00868    for (; p; p = p->next) {
00869       if (!strcasecmp(p->sid, sid))
00870          break;
00871    }
00872 
00873    if (!p) {
00874       ast_log(LOG_NOTICE, "No matching gtalk session - SID %s!\n", sid);
00875       goto safeout;
00876    }
00877 
00878    ast_rtp_instance_get_local_address(p->rtp, &sin_tmp);
00879    ast_sockaddr_to_sin(&sin_tmp, &sin);
00880 
00881    gtalk_get_local_ip(&us);
00882 
00883    if (!strcmp(ast_sockaddr_stringify_addr(&us), "127.0.0.1")) {
00884       ast_log(LOG_WARNING, "Found a loopback IP on the system, check your network configuration or set the bindaddr attribute.");
00885    }
00886 
00887    /* Setup our gtalk candidates */
00888    ast_copy_string(ours1->name, "rtp", sizeof(ours1->name));
00889    ours1->port = ntohs(sin.sin_port);
00890    ours1->preference = 1;
00891    snprintf(user, sizeof(user), "%08lx%08lx", ast_random(), ast_random());
00892    snprintf(pass, sizeof(pass), "%08lx%08lx", ast_random(), ast_random());
00893    ast_copy_string(ours1->username, user, sizeof(ours1->username));
00894    ast_copy_string(ours1->password, pass, sizeof(ours1->password));
00895    ast_copy_string(ours1->ip, ast_sockaddr_stringify_addr(&us),
00896          sizeof(ours1->ip));
00897    ours1->protocol = AJI_PROTOCOL_UDP;
00898    ours1->type = AJI_CONNECT_LOCAL;
00899    ours1->generation = 0;
00900    p->ourcandidates = ours1;
00901 
00902    /* XXX this is a blocking action.  We send a STUN request to the server
00903     * and wait for the response.  If blocking here is a problem the STUN requests/responses
00904     * for the externip may need to be done differently. */
00905    gtalk_update_externip();
00906    if (!ast_strlen_zero(externip)) {
00907       ast_copy_string(ours2->username, user, sizeof(ours2->username));
00908       ast_copy_string(ours2->password, pass, sizeof(ours2->password));
00909       ast_copy_string(ours2->ip, externip, sizeof(ours2->ip));
00910       ast_copy_string(ours2->name, "rtp", sizeof(ours1->name));
00911       ours2->port = ntohs(sin.sin_port);
00912       ours2->preference = 0.9;
00913       ours2->protocol = AJI_PROTOCOL_UDP;
00914       ours2->type = AJI_CONNECT_STUN;
00915       ours2->generation = 0;
00916       ours1->next = ours2;
00917       ours2 = NULL;
00918    }
00919    ours1 = NULL;
00920 
00921    for (tmp = p->ourcandidates; tmp; tmp = tmp->next) {
00922       snprintf(port, sizeof(port), "%d", tmp->port);
00923       snprintf(preference, sizeof(preference), "%.2f", tmp->preference);
00924       iks_insert_attrib(iq, "from", to);
00925       iks_insert_attrib(iq, "to", from);
00926       iks_insert_attrib(iq, "type", "set");
00927       iks_insert_attrib(iq, "id", c->mid);
00928       ast_aji_increment_mid(c->mid);
00929       iks_insert_attrib(gtalk, "type", "candidates");
00930       iks_insert_attrib(gtalk, "id", sid);
00931       /* put the initiator attribute to lower case if we receive the call
00932        * otherwise GoogleTalk won't establish the session */
00933       if (!p->initiator) {
00934               char c;
00935          char *t = lowerfrom = ast_strdupa(from);
00936          while (((c = *t) != '/') && (*t++ = tolower(c)));
00937       }
00938       iks_insert_attrib(gtalk, "initiator", (p->initiator) ? to : lowerfrom);
00939       iks_insert_attrib(gtalk, "xmlns", GOOGLE_NS);
00940       iks_insert_attrib(candidate, "name", tmp->name);
00941       iks_insert_attrib(candidate, "address", tmp->ip);
00942       iks_insert_attrib(candidate, "port", port);
00943       iks_insert_attrib(candidate, "username", tmp->username);
00944       iks_insert_attrib(candidate, "password", tmp->password);
00945       iks_insert_attrib(candidate, "preference", preference);
00946       if (tmp->protocol == AJI_PROTOCOL_UDP)
00947          iks_insert_attrib(candidate, "protocol", "udp");
00948       if (tmp->protocol == AJI_PROTOCOL_SSLTCP)
00949          iks_insert_attrib(candidate, "protocol", "ssltcp");
00950       if (tmp->type == AJI_CONNECT_STUN)
00951          iks_insert_attrib(candidate, "type", "stun");
00952       if (tmp->type == AJI_CONNECT_LOCAL)
00953          iks_insert_attrib(candidate, "type", "local");
00954       if (tmp->type == AJI_CONNECT_RELAY)
00955          iks_insert_attrib(candidate, "type", "relay");
00956       iks_insert_attrib(candidate, "network", "0");
00957       iks_insert_attrib(candidate, "generation", "0");
00958       ast_aji_send(c, iq);
00959    }
00960    p->laststun = 0;
00961 
00962 safeout:
00963    if (ours1)
00964       ast_free(ours1);
00965    if (ours2)
00966       ast_free(ours2);
00967    iks_delete(iq);
00968    iks_delete(gtalk);
00969    iks_delete(candidate);
00970    iks_delete(transport);
00971 
00972    return 1;
00973 }
00974 
00975 static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid)
00976 {
00977    struct gtalk_pvt *tmp = NULL;
00978    struct aji_resource *resources = NULL;
00979    struct aji_buddy *buddy;
00980    char idroster[200];
00981    char *data, *exten = NULL;
00982    struct ast_sockaddr bindaddr_tmp;
00983 
00984    ast_debug(1, "The client is %s for alloc\n", client->name);
00985    if (!sid && !strchr(them, '/')) {   /* I started call! */
00986       if (!strcasecmp(client->name, "guest")) {
00987          buddy = ASTOBJ_CONTAINER_FIND(&client->connection->buddies, them);
00988          if (buddy) {
00989             resources = buddy->resources;
00990          }
00991       } else if (client->buddy) {
00992          resources = client->buddy->resources;
00993       }
00994 
00995       while (resources) {
00996          if (resources->cap->jingle) {
00997             break;
00998          }
00999          resources = resources->next;
01000       }
01001       if (resources) {
01002          snprintf(idroster, sizeof(idroster), "%s/%s", them, resources->resource);
01003       } else if ((*them == '+') || (strstr(them, "@voice.google.com"))) {
01004          snprintf(idroster, sizeof(idroster), "%s", them);
01005       } else {
01006          ast_log(LOG_ERROR, "no gtalk capable clients to talk to.\n");
01007          return NULL;
01008       }
01009    }
01010    if (!(tmp = ast_calloc(1, sizeof(*tmp)))) {
01011       return NULL;
01012    }
01013 
01014    memcpy(&tmp->prefs, &client->prefs, sizeof(struct ast_codec_pref));
01015 
01016    if (sid) {
01017       ast_copy_string(tmp->sid, sid, sizeof(tmp->sid));
01018       ast_copy_string(tmp->them, them, sizeof(tmp->them));
01019       ast_copy_string(tmp->us, us, sizeof(tmp->us));
01020    } else {
01021       snprintf(tmp->sid, sizeof(tmp->sid), "%08lx%08lx", ast_random(), ast_random());
01022       ast_copy_string(tmp->them, idroster, sizeof(tmp->them));
01023       ast_copy_string(tmp->us, us, sizeof(tmp->us));
01024       tmp->initiator = 1;
01025    }
01026    /* clear codecs */
01027    bindaddr.sin_family = AF_INET;
01028    ast_sockaddr_from_sin(&bindaddr_tmp, &bindaddr);
01029    if (!(tmp->rtp = ast_rtp_instance_new("asterisk", sched, &bindaddr_tmp, NULL))) {
01030      ast_log(LOG_ERROR, "Failed to create a new RTP instance (possibly an invalid bindaddr?)\n");
01031      ast_free(tmp);
01032      return NULL;
01033    }
01034    ast_rtp_instance_set_prop(tmp->rtp, AST_RTP_PROPERTY_RTCP, 1);
01035    ast_rtp_instance_set_prop(tmp->rtp, AST_RTP_PROPERTY_STUN, 1);
01036    ast_rtp_instance_set_prop(tmp->rtp, AST_RTP_PROPERTY_DTMF, 1);
01037    ast_rtp_instance_dtmf_mode_set(tmp->rtp, AST_RTP_DTMF_MODE_RFC2833);
01038    ast_rtp_codecs_payloads_clear(ast_rtp_instance_get_codecs(tmp->rtp), tmp->rtp);
01039 
01040    /* add user configured codec capabilites */
01041    if (client->capability) {
01042       tmp->capability = client->capability;
01043    } else if (global_capability) {
01044       tmp->capability = global_capability;
01045    }
01046 
01047    tmp->parent = client;
01048    if (!tmp->rtp) {
01049       ast_log(LOG_WARNING, "Out of RTP sessions?\n");
01050       ast_free(tmp);
01051       return NULL;
01052    }
01053 
01054    /* Set CALLERID(name) to the full JID of the remote peer */
01055    ast_copy_string(tmp->cid_name, tmp->them, sizeof(tmp->cid_name));
01056 
01057    if(strchr(tmp->us, '/')) {
01058       data = ast_strdupa(tmp->us);
01059       exten = strsep(&data, "/");
01060    } else {
01061       exten = tmp->us;
01062    }
01063    ast_copy_string(tmp->exten,  exten, sizeof(tmp->exten));
01064    ast_mutex_init(&tmp->lock);
01065    ast_mutex_lock(&gtalklock);
01066    tmp->next = client->p;
01067    client->p = tmp;
01068    ast_mutex_unlock(&gtalklock);
01069    return tmp;
01070 }
01071 
01072 /*! \brief Start new gtalk channel */
01073 static struct ast_channel *gtalk_new(struct gtalk *client, struct gtalk_pvt *i, int state, const char *title, const char *linkedid)
01074 {
01075    struct ast_channel *tmp;
01076    int fmt;
01077    int what;
01078    const char *n2;
01079 
01080    if (title)
01081       n2 = title;
01082    else
01083       n2 = i->us;
01084    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);
01085    if (!tmp) {
01086       ast_log(LOG_WARNING, "Unable to allocate Gtalk channel structure!\n");
01087       return NULL;
01088    }
01089    tmp->tech = &gtalk_tech;
01090 
01091    /* Select our native format based on codec preference until we receive
01092       something from another device to the contrary. */
01093    if (i->jointcapability)
01094       what = i->jointcapability;
01095    else if (i->capability)
01096       what = i->capability;
01097    else
01098       what = global_capability;
01099 
01100    /* Set Frame packetization */
01101    if (i->rtp) {
01102       ast_rtp_codecs_packetization_set(ast_rtp_instance_get_codecs(i->rtp), i->rtp, &i->prefs);
01103    }
01104 
01105    tmp->nativeformats = ast_codec_choose(&i->prefs, what, 1) | (i->jointcapability & AST_FORMAT_VIDEO_MASK);
01106    fmt = ast_best_codec(tmp->nativeformats);
01107 
01108    if (i->rtp) {
01109       ast_channel_set_fd(tmp, 0, ast_rtp_instance_fd(i->rtp, 0));
01110       ast_channel_set_fd(tmp, 1, ast_rtp_instance_fd(i->rtp, 1));
01111    }
01112    if (i->vrtp) {
01113       ast_channel_set_fd(tmp, 2, ast_rtp_instance_fd(i->vrtp, 0));
01114       ast_channel_set_fd(tmp, 3, ast_rtp_instance_fd(i->vrtp, 1));
01115    }
01116    if (state == AST_STATE_RING)
01117       tmp->rings = 1;
01118    tmp->adsicpe = AST_ADSI_UNAVAILABLE;
01119    tmp->writeformat = fmt;
01120    tmp->rawwriteformat = fmt;
01121    tmp->readformat = fmt;
01122    tmp->rawreadformat = fmt;
01123    tmp->tech_pvt = i;
01124 
01125    tmp->callgroup = client->callgroup;
01126    tmp->pickupgroup = client->pickupgroup;
01127    tmp->caller.id.name.presentation = client->callingpres;
01128    tmp->caller.id.number.presentation = client->callingpres;
01129    if (!ast_strlen_zero(client->accountcode))
01130       ast_string_field_set(tmp, accountcode, client->accountcode);
01131    if (client->amaflags)
01132       tmp->amaflags = client->amaflags;
01133    if (!ast_strlen_zero(client->language))
01134       ast_string_field_set(tmp, language, client->language);
01135    if (!ast_strlen_zero(client->musicclass))
01136       ast_string_field_set(tmp, musicclass, client->musicclass);
01137    if (!ast_strlen_zero(client->parkinglot))
01138       ast_string_field_set(tmp, parkinglot, client->parkinglot);
01139    i->owner = tmp;
01140    ast_module_ref(ast_module_info->self);
01141    ast_copy_string(tmp->context, client->context, sizeof(tmp->context));
01142    ast_copy_string(tmp->exten, i->exten, sizeof(tmp->exten));
01143 
01144    if (!ast_strlen_zero(i->exten) && strcmp(i->exten, "s")) {
01145       tmp->dialed.number.str = ast_strdup(i->exten);
01146    }
01147    tmp->priority = 1;
01148    if (i->rtp)
01149       ast_jb_configure(tmp, &global_jbconf);
01150    if (state != AST_STATE_DOWN && ast_pbx_start(tmp)) {
01151       ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
01152       tmp->hangupcause = AST_CAUSE_SWITCH_CONGESTION;
01153       ast_hangup(tmp);
01154       tmp = NULL;
01155    } else {
01156       manager_event(EVENT_FLAG_SYSTEM, "ChannelUpdate",
01157          "Channel: %s\r\nChanneltype: %s\r\nGtalk-SID: %s\r\n",
01158          i->owner ? i->owner->name : "", "Gtalk", i->sid);
01159    }
01160    return tmp;
01161 }
01162 
01163 static int gtalk_action(struct gtalk *client, struct gtalk_pvt *p, const char *action)
01164 {
01165    iks *request, *session = NULL;
01166    int res = -1;
01167    char *lowerthem = NULL;
01168 
01169    request = iks_new("iq");
01170    if (request) {
01171       iks_insert_attrib(request, "type", "set");
01172       iks_insert_attrib(request, "from", p->us);
01173       iks_insert_attrib(request, "to", p->them);
01174       iks_insert_attrib(request, "id", client->connection->mid);
01175       ast_aji_increment_mid(client->connection->mid);
01176       session = iks_new("session");
01177       if (session) {
01178          iks_insert_attrib(session, "type", action);
01179          iks_insert_attrib(session, "id", p->sid);
01180          /* put the initiator attribute to lower case if we receive the call
01181           * otherwise GoogleTalk won't establish the session */
01182          if (!p->initiator) {
01183                  char c;
01184             char *t = lowerthem = ast_strdupa(p->them);
01185             while (((c = *t) != '/') && (*t++ = tolower(c)));
01186          }
01187          iks_insert_attrib(session, "initiator", p->initiator ? p->us : lowerthem);
01188          iks_insert_attrib(session, "xmlns", GOOGLE_NS);
01189          iks_insert_node(request, session);
01190          ast_aji_send(client->connection, request);
01191          res = 0;
01192       }
01193    }
01194 
01195    iks_delete(session);
01196    iks_delete(request);
01197 
01198    return res;
01199 }
01200 
01201 static void gtalk_free_candidates(struct gtalk_candidate *candidate)
01202 {
01203    struct gtalk_candidate *last;
01204    while (candidate) {
01205       last = candidate;
01206       candidate = candidate->next;
01207       ast_free(last);
01208    }
01209 }
01210 
01211 static void gtalk_free_pvt(struct gtalk *client, struct gtalk_pvt *p)
01212 {
01213    struct gtalk_pvt *cur, *prev = NULL;
01214    cur = client->p;
01215    while (cur) {
01216       if (cur == p) {
01217          if (prev)
01218             prev->next = p->next;
01219          else
01220             client->p = p->next;
01221          break;
01222       }
01223       prev = cur;
01224       cur = cur->next;
01225    }
01226    if (p->ringrule)
01227       iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
01228    if (p->owner)
01229       ast_log(LOG_WARNING, "Uh oh, there's an owner, this is going to be messy.\n");
01230    if (p->rtp)
01231       ast_rtp_instance_destroy(p->rtp);
01232    if (p->vrtp)
01233       ast_rtp_instance_destroy(p->vrtp);
01234    gtalk_free_candidates(p->theircandidates);
01235    ast_free(p);
01236 }
01237 
01238 
01239 static int gtalk_newcall(struct gtalk *client, ikspak *pak)
01240 {
01241    struct gtalk_pvt *p, *tmp = client->p;
01242    struct ast_channel *chan;
01243    int res;
01244    iks *codec;
01245    char *from = NULL;
01246    char s1[BUFSIZ], s2[BUFSIZ], s3[BUFSIZ];
01247    int peernoncodeccapability;
01248    char *sid;
01249 
01250    /* Make sure our new call doesn't exist yet */
01251    from = iks_find_attrib(pak->x,"to");
01252    if (!from) {
01253       from = client->connection->jid->full;
01254    }
01255 
01256    while (tmp) {
01257       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) ||
01258          (iks_find_attrib(pak->query, "id") && !strcmp(iks_find_attrib(pak->query, "id"), tmp->sid))) {
01259          ast_log(LOG_NOTICE, "Ignoring duplicate call setup on SID %s\n", tmp->sid);
01260          gtalk_response(client, from, pak, "out-of-order", NULL);
01261          return -1;
01262       }
01263       tmp = tmp->next;
01264    }
01265 
01266    if (!strcasecmp(client->name, "guest")){
01267       /* the guest account is not tied to any configured XMPP client,
01268          let's set it now */
01269       client->connection = ast_aji_get_client(from);
01270       if (!client->connection) {
01271          ast_log(LOG_ERROR, "No XMPP client to talk to, us (partial JID) : %s\n", from);
01272          return -1;
01273       }
01274    }
01275 
01276    if (!(sid = iks_find_attrib(pak->query, "id"))) {
01277       ast_log(LOG_WARNING, "Received Initiate without id attribute. Can not start call.\n");
01278       return -1;
01279    }
01280 
01281    p = gtalk_alloc(client, from, pak->from->full, sid);
01282    if (!p) {
01283       ast_log(LOG_WARNING, "Unable to allocate gtalk structure!\n");
01284       return -1;
01285    }
01286 
01287    chan = gtalk_new(client, p, AST_STATE_DOWN, pak->from->user, NULL);
01288    if (!chan) {
01289       gtalk_free_pvt(client, p);
01290       return -1;
01291    }
01292 
01293    ast_mutex_lock(&p->lock);
01294    ast_copy_string(p->them, pak->from->full, sizeof(p->them));
01295    ast_copy_string(p->sid, sid, sizeof(p->sid));
01296 
01297    /* codec points to the first <payload-type/> tag */
01298    codec = iks_first_tag(iks_first_tag(iks_first_tag(pak->x)));
01299 
01300    while (codec) {
01301       char *codec_id = iks_find_attrib(codec, "id");
01302       char *codec_name = iks_find_attrib(codec, "name");
01303       if (!codec_id || !codec_name) {
01304          codec = iks_next_tag(codec);
01305          continue;
01306       }
01307       if (!strcmp(S_OR(iks_name(codec), ""), "vid:payload-type") && p->vrtp) {
01308          ast_rtp_codecs_payloads_set_m_type(
01309             ast_rtp_instance_get_codecs(p->vrtp),
01310             p->vrtp,
01311             atoi(codec_id));
01312          ast_rtp_codecs_payloads_set_rtpmap_type(
01313             ast_rtp_instance_get_codecs(p->vrtp),
01314             p->vrtp,
01315             atoi(codec_id),
01316             "video",
01317             codec_name,
01318             0);
01319       } else {
01320          ast_rtp_codecs_payloads_set_m_type(
01321             ast_rtp_instance_get_codecs(p->rtp),
01322             p->rtp,
01323             atoi(codec_id));
01324          ast_rtp_codecs_payloads_set_rtpmap_type(
01325             ast_rtp_instance_get_codecs(p->rtp),
01326             p->rtp,
01327             atoi(codec_id),
01328             "audio",
01329             codec_name,
01330             0);
01331       }
01332       codec = iks_next_tag(codec);
01333    }
01334 
01335    /* Now gather all of the codecs that we are asked for */
01336    ast_rtp_codecs_payload_formats(ast_rtp_instance_get_codecs(p->rtp), &p->peercapability, &peernoncodeccapability);
01337    p->jointcapability = p->capability & p->peercapability;
01338    ast_mutex_unlock(&p->lock);
01339 
01340    ast_setstate(chan, AST_STATE_RING);
01341    if (!p->jointcapability) {
01342       ast_log(LOG_WARNING, "Capabilities don't match : us - %s, peer - %s, combined - %s \n", ast_getformatname_multiple(s1, BUFSIZ, p->capability),
01343          ast_getformatname_multiple(s2, BUFSIZ, p->peercapability),
01344          ast_getformatname_multiple(s3, BUFSIZ, p->jointcapability));
01345       /* close session if capabilities don't match */
01346       gtalk_action(client, p, "reject");
01347       p->alreadygone = 1;
01348       gtalk_hangup(chan);
01349       ast_channel_release(chan);
01350       return -1;
01351    }
01352 
01353    res = ast_pbx_start(chan);
01354 
01355    switch (res) {
01356    case AST_PBX_FAILED:
01357       ast_log(LOG_WARNING, "Failed to start PBX :(\n");
01358       gtalk_response(client, from, pak, "service-unavailable", NULL);
01359       break;
01360    case AST_PBX_CALL_LIMIT:
01361       ast_log(LOG_WARNING, "Failed to start PBX (call limit reached) \n");
01362       gtalk_response(client, from, pak, "service-unavailable", NULL);
01363       break;
01364    case AST_PBX_SUCCESS:
01365       gtalk_response(client, from, pak, NULL, NULL);
01366       gtalk_create_candidates(client, p, p->sid, p->them, p->us);
01367       /* nothing to do */
01368       break;
01369    }
01370 
01371    return 1;
01372 }
01373 
01374 static int gtalk_update_externip(void)
01375 {
01376    int sock;
01377    char *newaddr;
01378    struct sockaddr_in answer = { 0, };
01379    struct sockaddr_in *dst;
01380    struct ast_sockaddr tmp_dst;
01381 
01382    if (!stunaddr.sin_addr.s_addr) {
01383       return -1;
01384    }
01385    dst = &stunaddr;
01386 
01387    sock = socket(AF_INET, SOCK_DGRAM, 0);
01388    if (sock < 0) {
01389       ast_log(LOG_WARNING, "Unable to create STUN socket: %s\n", strerror(errno));
01390       return -1;
01391    }
01392 
01393    ast_sockaddr_from_sin(&tmp_dst, dst);
01394    if (ast_connect(sock, &tmp_dst) != 0) {
01395       ast_log(LOG_WARNING, "STUN Failed to connect to %s\n", ast_sockaddr_stringify(&tmp_dst));
01396       close(sock);
01397       return -1;
01398    }
01399 
01400    if ((ast_stun_request(sock, &stunaddr, NULL, &answer))) {
01401       close(sock);
01402       return -1;
01403    }
01404 
01405    newaddr = ast_strdupa(ast_inet_ntoa(answer.sin_addr));
01406    memcpy(externip, newaddr, sizeof(externip));
01407 
01408    close(sock);
01409    return 0;
01410 
01411 }
01412 
01413 static int gtalk_update_stun(struct gtalk *client, struct gtalk_pvt *p)
01414 {
01415    struct gtalk_candidate *tmp;
01416    struct hostent *hp;
01417    struct ast_hostent ahp;
01418    struct sockaddr_in sin = { 0, };
01419    struct sockaddr_in aux = { 0, };
01420    struct ast_sockaddr sin_tmp;
01421    struct ast_sockaddr aux_tmp;
01422 
01423    if (time(NULL) == p->laststun)
01424       return 0;
01425 
01426    tmp = p->theircandidates;
01427    p->laststun = time(NULL);
01428    while (tmp) {
01429       char username[256];
01430 
01431       /* Find the IP address of the host */
01432       if (!(hp = ast_gethostbyname(tmp->ip, &ahp))) {
01433          ast_log(LOG_WARNING, "Could not get host by name for %s\n", tmp->ip);
01434          tmp = tmp->next;
01435          continue;
01436       }
01437       sin.sin_family = AF_INET;
01438       memcpy(&sin.sin_addr, hp->h_addr, sizeof(sin.sin_addr));
01439       sin.sin_port = htons(tmp->port);
01440       snprintf(username, sizeof(username), "%s%s", tmp->username, p->ourcandidates->username);
01441 
01442       /* Find out the result of the STUN */
01443       ast_rtp_instance_get_remote_address(p->rtp, &aux_tmp);
01444       ast_sockaddr_to_sin(&aux_tmp, &aux);
01445 
01446       /* If the STUN result is different from the IP of the hostname,
01447        * lock on the stun IP of the hostname advertised by the
01448        * remote client */
01449       if (aux.sin_addr.s_addr && (aux.sin_addr.s_addr != sin.sin_addr.s_addr)) {
01450          ast_rtp_instance_stun_request(p->rtp, &aux_tmp, username);
01451       } else {
01452          ast_sockaddr_from_sin(&sin_tmp, &sin);
01453          ast_rtp_instance_stun_request(p->rtp, &sin_tmp, username);
01454       }
01455       if (aux.sin_addr.s_addr) {
01456          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);
01457          ast_debug(4, "Sending STUN request to %s\n", tmp->ip);
01458       }
01459 
01460       tmp = tmp->next;
01461    }
01462    return 1;
01463 }
01464 
01465 static int gtalk_add_candidate(struct gtalk *client, ikspak *pak)
01466 {
01467    struct gtalk_pvt *p = NULL, *tmp = NULL;
01468    struct aji_client *c = client->connection;
01469    struct gtalk_candidate *newcandidate = NULL;
01470    iks *traversenodes = NULL, *receipt = NULL;
01471    char *from;
01472 
01473    from = iks_find_attrib(pak->x,"to");
01474    if (!from) {
01475       from = c->jid->full;
01476    }
01477 
01478    for (tmp = client->p; tmp; tmp = tmp->next) {
01479       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) ||
01480          (iks_find_attrib(pak->query, "id") && !strcmp(iks_find_attrib(pak->query, "id"), tmp->sid))) {
01481          p = tmp;
01482          break;
01483       }
01484    }
01485 
01486    if (!p) {
01487       return -1;
01488    }
01489    traversenodes = pak->query;
01490    while(traversenodes) {
01491       if(!strcasecmp(S_OR(iks_name(traversenodes), ""), "session")) {
01492          traversenodes = iks_first_tag(traversenodes);
01493          continue;
01494       }
01495       if(!strcasecmp(S_OR(iks_name(traversenodes), ""), "ses:session")) {
01496          traversenodes = iks_child(traversenodes);
01497          continue;
01498       }
01499       if(!strcasecmp(S_OR(iks_name(traversenodes), ""), "candidate") || !strcasecmp(S_OR(iks_name(traversenodes), ""), "ses:candidate")) {
01500          newcandidate = ast_calloc(1, sizeof(*newcandidate));
01501          if (!newcandidate)
01502             return 0;
01503          ast_copy_string(newcandidate->name,
01504             S_OR(iks_find_attrib(traversenodes, "name"), ""),
01505             sizeof(newcandidate->name));
01506          ast_copy_string(newcandidate->ip,
01507             S_OR(iks_find_attrib(traversenodes, "address"), ""),
01508             sizeof(newcandidate->ip));
01509          newcandidate->port = atoi(iks_find_attrib(traversenodes, "port"));
01510          ast_copy_string(newcandidate->username,
01511             S_OR(iks_find_attrib(traversenodes, "username"), ""),
01512             sizeof(newcandidate->username));
01513          ast_copy_string(newcandidate->password,
01514             S_OR(iks_find_attrib(traversenodes, "password"), ""),
01515             sizeof(newcandidate->password));
01516          newcandidate->preference = atof(iks_find_attrib(traversenodes, "preference"));
01517          if (!strcasecmp(S_OR(iks_find_attrib(traversenodes, "protocol"), ""), "udp"))
01518             newcandidate->protocol = AJI_PROTOCOL_UDP;
01519          if (!strcasecmp(S_OR(iks_find_attrib(traversenodes, "protocol"), ""), "ssltcp"))
01520             newcandidate->protocol = AJI_PROTOCOL_SSLTCP;
01521 
01522          if (!strcasecmp(S_OR(iks_find_attrib(traversenodes, "type"), ""), "stun"))
01523             newcandidate->type = AJI_CONNECT_STUN;
01524          if (!strcasecmp(S_OR(iks_find_attrib(traversenodes, "type"), ""), "local"))
01525             newcandidate->type = AJI_CONNECT_LOCAL;
01526          if (!strcasecmp(S_OR(iks_find_attrib(traversenodes, "type"), ""), "relay"))
01527             newcandidate->type = AJI_CONNECT_RELAY;
01528          ast_copy_string(newcandidate->network,
01529             S_OR(iks_find_attrib(traversenodes, "network"), ""),
01530             sizeof(newcandidate->network));
01531          newcandidate->generation = atoi(S_OR(iks_find_attrib(traversenodes, "generation"), "0"));
01532          newcandidate->next = NULL;
01533 
01534          newcandidate->next = p->theircandidates;
01535          p->theircandidates = newcandidate;
01536          p->laststun = 0;
01537          gtalk_update_stun(p->parent, p);
01538          newcandidate = NULL;
01539       }
01540       traversenodes = iks_next_tag(traversenodes);
01541    }
01542 
01543    receipt = iks_new("iq");
01544    iks_insert_attrib(receipt, "type", "result");
01545    iks_insert_attrib(receipt, "from", from);
01546    iks_insert_attrib(receipt, "to", S_OR(iks_find_attrib(pak->x, "from"), ""));
01547    iks_insert_attrib(receipt, "id", S_OR(iks_find_attrib(pak->x, "id"), ""));
01548    ast_aji_send(c, receipt);
01549 
01550    iks_delete(receipt);
01551 
01552    return 1;
01553 }
01554 
01555 static struct ast_frame *gtalk_rtp_read(struct ast_channel *ast, struct gtalk_pvt *p)
01556 {
01557    struct ast_frame *f;
01558 
01559    if (!p->rtp) {
01560       return &ast_null_frame;
01561    }
01562    f = ast_rtp_instance_read(p->rtp, 0);
01563    gtalk_update_stun(p->parent, p);
01564    if (p->owner) {
01565       /* We already hold the channel lock */
01566       if (f->frametype == AST_FRAME_VOICE) {
01567          if (f->subclass.codec != (p->owner->nativeformats & AST_FORMAT_AUDIO_MASK)) {
01568             ast_debug(1, "Oooh, format changed to %s\n", ast_getformatname(f->subclass.codec));
01569             p->owner->nativeformats =
01570                (p->owner->nativeformats & AST_FORMAT_VIDEO_MASK) | f->subclass.codec;
01571             ast_set_read_format(p->owner, p->owner->readformat);
01572             ast_set_write_format(p->owner, p->owner->writeformat);
01573          }
01574          /* if ((ast_test_flag(p, SIP_DTMF) == SIP_DTMF_INBAND) && p->vad) {
01575             f = ast_dsp_process(p->owner, p->vad, f);
01576             if (option_debug && f && (f->frametype == AST_FRAME_DTMF))
01577                ast_debug(1, "* Detected inband DTMF '%c'\n", f->subclass);
01578            } */
01579       }
01580    }
01581    return f;
01582 }
01583 
01584 static struct ast_frame *gtalk_read(struct ast_channel *ast)
01585 {
01586    struct ast_frame *fr;
01587    struct gtalk_pvt *p = ast->tech_pvt;
01588 
01589    ast_mutex_lock(&p->lock);
01590    fr = gtalk_rtp_read(ast, p);
01591    ast_mutex_unlock(&p->lock);
01592    return fr;
01593 }
01594 
01595 /*! \brief Send frame to media channel (rtp) */
01596 static int gtalk_write(struct ast_channel *ast, struct ast_frame *frame)
01597 {
01598    struct gtalk_pvt *p = ast->tech_pvt;
01599    int res = 0;
01600    char buf[256];
01601 
01602    switch (frame->frametype) {
01603    case AST_FRAME_VOICE:
01604       if (!(frame->subclass.codec & ast->nativeformats)) {
01605          ast_log(LOG_WARNING,
01606                "Asked to transmit frame type %s, while native formats is %s (read/write = %s/%s)\n",
01607                ast_getformatname(frame->subclass.codec),
01608                ast_getformatname_multiple(buf, sizeof(buf), ast->nativeformats),
01609                ast_getformatname(ast->readformat),
01610                ast_getformatname(ast->writeformat));
01611          return 0;
01612       }
01613       if (p) {
01614          ast_mutex_lock(&p->lock);
01615          if (p->rtp) {
01616             res = ast_rtp_instance_write(p->rtp, frame);
01617          }
01618          ast_mutex_unlock(&p->lock);
01619       }
01620       break;
01621    case AST_FRAME_VIDEO:
01622       if (p) {
01623          ast_mutex_lock(&p->lock);
01624          if (p->vrtp) {
01625             res = ast_rtp_instance_write(p->vrtp, frame);
01626          }
01627          ast_mutex_unlock(&p->lock);
01628       }
01629       break;
01630    case AST_FRAME_IMAGE:
01631       return 0;
01632       break;
01633    default:
01634       ast_log(LOG_WARNING, "Can't send %d type frames with Gtalk write\n",
01635             frame->frametype);
01636       return 0;
01637    }
01638 
01639    return res;
01640 }
01641 
01642 static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
01643 {
01644    struct gtalk_pvt *p = newchan->tech_pvt;
01645    ast_mutex_lock(&p->lock);
01646 
01647    if ((p->owner != oldchan)) {
01648       ast_mutex_unlock(&p->lock);
01649       return -1;
01650    }
01651    if (p->owner == oldchan)
01652       p->owner = newchan;
01653    ast_mutex_unlock(&p->lock);
01654    return 0;
01655 }
01656 
01657 static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen)
01658 {
01659    int res = 0;
01660 
01661    switch (condition) {
01662    case AST_CONTROL_HOLD:
01663       ast_moh_start(ast, data, NULL);
01664       break;
01665    case AST_CONTROL_UNHOLD:
01666       ast_moh_stop(ast);
01667       break;
01668    default:
01669       ast_debug(3, "Don't know how to indicate condition '%d'\n", condition);
01670       res = -1;
01671    }
01672 
01673    return res;
01674 }
01675 
01676 static int gtalk_sendtext(struct ast_channel *chan, const char *text)
01677 {
01678    int res = 0;
01679    struct aji_client *client = NULL;
01680    struct gtalk_pvt *p = chan->tech_pvt;
01681 
01682    if (!p->parent) {
01683       ast_log(LOG_ERROR, "Parent channel not found\n");
01684       return -1;
01685    }
01686    if (!p->parent->connection) {
01687       ast_log(LOG_ERROR, "XMPP client not found\n");
01688       return -1;
01689    }
01690    client = p->parent->connection;
01691    res = ast_aji_send_chat(client, p->them, text);
01692    return res;
01693 }
01694 
01695 static int gtalk_digit_begin(struct ast_channel *chan, char digit)
01696 {
01697    struct gtalk_pvt *p = chan->tech_pvt;
01698    int res = 0;
01699 
01700    ast_mutex_lock(&p->lock);
01701    if (p->rtp) {
01702       ast_rtp_instance_dtmf_begin(p->rtp, digit);
01703    } else {
01704       res = -1;
01705    }
01706    ast_mutex_unlock(&p->lock);
01707 
01708    return res;
01709 }
01710 
01711 static int gtalk_digit_end(struct ast_channel *chan, char digit, unsigned int duration)
01712 {
01713    struct gtalk_pvt *p = chan->tech_pvt;
01714    int res = 0;
01715 
01716    ast_mutex_lock(&p->lock);
01717    if (p->rtp) {
01718       ast_rtp_instance_dtmf_end_with_duration(p->rtp, digit, duration);
01719    } else {
01720       res = -1;
01721    }
01722    ast_mutex_unlock(&p->lock);
01723 
01724    return res;
01725 }
01726 
01727 /* This function is of not in use at the moment, but I am choosing to leave this
01728  * within the code base as a reference to how DTMF is possible through
01729  * jingle signaling.  However, google currently does DTMF through the RTP. */
01730 #if 0
01731 static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration)
01732 {
01733    struct gtalk_pvt *p = ast->tech_pvt;
01734    struct gtalk *client = p->parent;
01735    iks *iq, *gtalk, *dtmf;
01736    char buffer[2] = {digit, '\0'};
01737    char *lowerthem = NULL;
01738    iq = iks_new("iq");
01739    gtalk = iks_new("gtalk");
01740    dtmf = iks_new("dtmf");
01741    if(!iq || !gtalk || !dtmf) {
01742       iks_delete(iq);
01743       iks_delete(gtalk);
01744       iks_delete(dtmf);
01745       ast_log(LOG_ERROR, "Did not send dtmf do to memory issue\n");
01746       return -1;
01747    }
01748 
01749    iks_insert_attrib(iq, "type", "set");
01750    iks_insert_attrib(iq, "to", p->them);
01751    iks_insert_attrib(iq, "from", p->us);
01752    iks_insert_attrib(iq, "id", client->connection->mid);
01753    ast_aji_increment_mid(client->connection->mid);
01754    iks_insert_attrib(gtalk, "xmlns", "http://jabber.org/protocol/gtalk");
01755    iks_insert_attrib(gtalk, "action", "session-info");
01756    // put the initiator attribute to lower case if we receive the call
01757    // otherwise GoogleTalk won't establish the session
01758    if (!p->initiator) {
01759            char c;
01760            char *t = lowerthem = ast_strdupa(p->them);
01761            while (((c = *t) != '/') && (*t++ = tolower(c)));
01762    }
01763    iks_insert_attrib(gtalk, "initiator", p->initiator ? p->us: lowerthem);
01764    iks_insert_attrib(gtalk, "sid", p->sid);
01765    iks_insert_attrib(dtmf, "xmlns", "http://jabber.org/protocol/gtalk/info/dtmf");
01766    iks_insert_attrib(dtmf, "code", buffer);
01767    iks_insert_node(iq, gtalk);
01768    iks_insert_node(gtalk, dtmf);
01769 
01770    ast_mutex_lock(&p->lock);
01771    if (ast->dtmff.frametype == AST_FRAME_DTMF_BEGIN || duration == 0) {
01772       iks_insert_attrib(dtmf, "action", "button-down");
01773    } else if (ast->dtmff.frametype == AST_FRAME_DTMF_END || duration != 0) {
01774       iks_insert_attrib(dtmf, "action", "button-up");
01775    }
01776    ast_aji_send(client->connection, iq);
01777 
01778    iks_delete(iq);
01779    iks_delete(gtalk);
01780    iks_delete(dtmf);
01781    ast_mutex_unlock(&p->lock);
01782    return 0;
01783 }
01784 #endif
01785 
01786 static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen)
01787 {
01788    ast_log(LOG_NOTICE, "XXX Implement gtalk sendhtml XXX\n");
01789 
01790    return -1;
01791 }
01792 
01793 /*!\brief Initiate new call, part of PBX interface
01794  * dest is the dial string */
01795 static int gtalk_call(struct ast_channel *ast, char *dest, int timeout)
01796 {
01797    struct gtalk_pvt *p = ast->tech_pvt;
01798 
01799    if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
01800       ast_log(LOG_WARNING, "gtalk_call called on %s, neither down nor reserved\n", ast->name);
01801       return -1;
01802    }
01803 
01804    ast_setstate(ast, AST_STATE_RING);
01805    if (!p->ringrule) {
01806       ast_copy_string(p->ring, p->parent->connection->mid, sizeof(p->ring));
01807       p->ringrule = iks_filter_add_rule(p->parent->connection->f, gtalk_ringing_ack, p,
01808                      IKS_RULE_ID, p->ring, IKS_RULE_DONE);
01809    } else {
01810       ast_log(LOG_WARNING, "Whoa, already have a ring rule!\n");
01811    }
01812 
01813    gtalk_invite(p, p->them, p->us, p->sid, 1);
01814 
01815    return 0;
01816 }
01817 
01818 /*! \brief Hangup a call through the gtalk proxy channel */
01819 static int gtalk_hangup(struct ast_channel *ast)
01820 {
01821    struct gtalk_pvt *p = ast->tech_pvt;
01822    struct gtalk *client;
01823 
01824    ast_mutex_lock(&p->lock);
01825    client = p->parent;
01826    p->owner = NULL;
01827    ast->tech_pvt = NULL;
01828    if (!p->alreadygone) {
01829       gtalk_action(client, p, "terminate");
01830    }
01831    ast_mutex_unlock(&p->lock);
01832 
01833    gtalk_free_pvt(client, p);
01834    ast_module_unref(ast_module_info->self);
01835 
01836    return 0;
01837 }
01838 
01839 /*!\brief Part of PBX interface */
01840 static struct ast_channel *gtalk_request(const char *type, format_t format, const struct ast_channel *requestor, void *data, int *cause)
01841 {
01842    struct gtalk_pvt *p = NULL;
01843    struct gtalk *client = NULL;
01844    char *sender = NULL, *to = NULL, *s = NULL;
01845    struct ast_channel *chan = NULL;
01846 
01847    if (data) {
01848       s = ast_strdupa(data);
01849       if (s) {
01850          sender = strsep(&s, "/");
01851          if (sender && (sender[0] != '\0')) {
01852             to = strsep(&s, "/");
01853          }
01854          if (!to) {
01855             ast_log(LOG_ERROR, "Bad arguments in Gtalk Dialstring: %s\n", (char*) data);
01856             return NULL;
01857          }
01858       }
01859    }
01860 
01861    client = find_gtalk(to, sender);
01862    if (!client) {
01863       ast_log(LOG_WARNING, "Could not find recipient.\n");
01864       return NULL;
01865    }
01866    if (!strcasecmp(client->name, "guest")){
01867       /* the guest account is not tied to any configured XMPP client,
01868          let's set it now */
01869       client->connection = ast_aji_get_client(sender);
01870       if (!client->connection) {
01871          ast_log(LOG_ERROR, "No XMPP client to talk to, us (partial JID) : %s\n", sender);
01872          ASTOBJ_UNREF(client, gtalk_member_destroy);
01873          return NULL;
01874       }
01875    }
01876 
01877    ASTOBJ_WRLOCK(client);
01878    p = gtalk_alloc(client, strchr(sender, '@') ? sender : client->connection->jid->full, strchr(to, '@') ? to : client->user, NULL);
01879    if (p) {
01880       chan = gtalk_new(client, p, AST_STATE_DOWN, to, requestor ? requestor->linkedid : NULL);
01881    }
01882    ASTOBJ_UNLOCK(client);
01883    return chan;
01884 }
01885 
01886 /*! \brief CLI command "gtalk show channels" */
01887 static char *gtalk_show_channels(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
01888 {
01889 #define FORMAT  "%-30.30s  %-30.30s  %-15.15s  %-5.5s %-5.5s \n"
01890    struct gtalk_pvt *p;
01891    struct ast_channel *chan;
01892    int numchans = 0;
01893    char them[AJI_MAX_JIDLEN];
01894    char *jid = NULL;
01895    char *resource = NULL;
01896 
01897    switch (cmd) {
01898    case CLI_INIT:
01899       e->command = "gtalk show channels";
01900       e->usage =
01901          "Usage: gtalk show channels\n"
01902          "       Shows current state of the Gtalk channels.\n";
01903       return NULL;
01904    case CLI_GENERATE:
01905       return NULL;
01906    }
01907 
01908    if (a->argc != 3)
01909       return CLI_SHOWUSAGE;
01910 
01911    ast_mutex_lock(&gtalklock);
01912    ast_cli(a->fd, FORMAT, "Channel", "Jabber ID", "Resource", "Read", "Write");
01913    ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
01914       ASTOBJ_WRLOCK(iterator);
01915       p = iterator->p;
01916       while(p) {
01917          chan = p->owner;
01918          ast_copy_string(them, p->them, sizeof(them));
01919          jid = them;
01920          resource = strchr(them, '/');
01921          if (!resource)
01922             resource = "None";
01923          else {
01924             *resource = '\0';
01925             resource ++;
01926          }
01927          if (chan)
01928             ast_cli(a->fd, FORMAT,
01929                chan->name,
01930                jid,
01931                resource,
01932                ast_getformatname(chan->readformat),
01933                ast_getformatname(chan->writeformat)
01934                );
01935          else
01936             ast_log(LOG_WARNING, "No available channel\n");
01937          numchans ++;
01938          p = p->next;
01939       }
01940       ASTOBJ_UNLOCK(iterator);
01941    });
01942 
01943    ast_mutex_unlock(&gtalklock);
01944 
01945    ast_cli(a->fd, "%d active gtalk channel%s\n", numchans, (numchans != 1) ? "s" : "");
01946    return CLI_SUCCESS;
01947 #undef FORMAT
01948 }
01949 
01950 /*! \brief CLI command "gtalk reload"
01951  *  \todo XXX TODO make this work. */
01952 #if 0
01953 static char *gtalk_do_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
01954 {
01955    switch (cmd) {
01956    case CLI_INIT:
01957       e->command = "gtalk reload";
01958       e->usage =
01959          "Usage: gtalk reload\n"
01960          "       Reload gtalk channel driver.\n";
01961       return NULL;
01962    case CLI_GENERATE:
01963       return NULL;
01964    }
01965 
01966    ast_verbose("IT DOES WORK!\n");
01967    return CLI_SUCCESS;
01968 }
01969 #endif
01970 
01971 static int gtalk_parser(void *data, ikspak *pak)
01972 {
01973    struct gtalk *client = ASTOBJ_REF((struct gtalk *) data);
01974    int res;
01975 
01976    if (!strcmp(S_OR(iks_find_attrib(pak->x, "type"), ""), "error")) {
01977       ast_log(LOG_NOTICE, "Remote peer reported an error, trying to establish the call anyway\n");
01978    }
01979 
01980    if (ast_strlen_zero(iks_find_attrib(pak->query, "type"))) {
01981       ast_log(LOG_NOTICE, "No attribute \"type\" found.  Ignoring message.\n");
01982    } else if (!strcmp(iks_find_attrib(pak->query, "type"), "initiate")) {
01983       /* New call */
01984       gtalk_newcall(client, pak);
01985    } else if (!strcmp(iks_find_attrib(pak->query, "type"), "candidates") || !strcmp(iks_find_attrib(pak->query, "type"), "transport-info")) {
01986       ast_debug(3, "About to add candidate!\n");
01987       res = gtalk_add_candidate(client, pak);
01988       if (!res) {
01989          ast_log(LOG_WARNING, "Could not add any candidate\n");
01990       } else {
01991          ast_debug(3, "Candidate Added!\n");
01992       }
01993    } else if (!strcmp(iks_find_attrib(pak->query, "type"), "accept")) {
01994       gtalk_is_answered(client, pak);
01995    } else if (!strcmp(iks_find_attrib(pak->query, "type"), "transport-accept")) {
01996       gtalk_is_accepted(client, pak);
01997    } else if (!strcmp(iks_find_attrib(pak->query, "type"), "content-info") || iks_find_with_attrib(pak->x, "gtalk", "action", "session-info")) {
01998       gtalk_handle_dtmf(client, pak);
01999    } else if (!strcmp(iks_find_attrib(pak->query, "type"), "terminate")) {
02000       gtalk_hangup_farend(client, pak);
02001    } else if (!strcmp(iks_find_attrib(pak->query, "type"), "reject")) {
02002       gtalk_hangup_farend(client, pak);
02003    }
02004    ASTOBJ_UNREF(client, gtalk_member_destroy);
02005    return IKS_FILTER_EAT;
02006 }
02007 
02008 static int gtalk_create_member(char *label, struct ast_variable *var, int allowguest,
02009                         struct ast_codec_pref prefs, char *context,
02010                         struct gtalk *member)
02011 {
02012    struct aji_client *client;
02013 
02014    if (!member)
02015       ast_log(LOG_WARNING, "Out of memory.\n");
02016 
02017    ast_copy_string(member->name, label, sizeof(member->name));
02018    ast_copy_string(member->user, label, sizeof(member->user));
02019    ast_copy_string(member->context, context, sizeof(member->context));
02020    member->allowguest = allowguest;
02021    member->prefs = prefs;
02022    while (var) {
02023       if (!strcasecmp(var->name, "username"))
02024          ast_copy_string(member->user, var->value, sizeof(member->user));
02025       else if (!strcasecmp(var->name, "disallow"))
02026          ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 0);
02027       else if (!strcasecmp(var->name, "allow"))
02028          ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 1);
02029       else if (!strcasecmp(var->name, "context"))
02030          ast_copy_string(member->context, var->value, sizeof(member->context));
02031       else if (!strcasecmp(var->name, "parkinglot"))
02032          ast_copy_string(member->parkinglot, var->value, sizeof(member->parkinglot));
02033       else if (!strcasecmp(var->name, "connection")) {
02034          if ((client = ast_aji_get_client(var->value))) {
02035             member->connection = client;
02036             iks_filter_add_rule(client->f, gtalk_parser, member,
02037                       IKS_RULE_TYPE, IKS_PAK_IQ,
02038                       IKS_RULE_FROM_PARTIAL, member->user,
02039                       IKS_RULE_NS, GOOGLE_NS,
02040                       IKS_RULE_DONE);
02041          } else {
02042             ast_log(LOG_ERROR, "connection referenced not found!\n");
02043             return 0;
02044          }
02045       }
02046       var = var->next;
02047    }
02048    if (member->connection && member->user)
02049       member->buddy = ASTOBJ_CONTAINER_FIND(&member->connection->buddies, member->user);
02050    else {
02051       ast_log(LOG_ERROR, "No Connection or Username!\n");
02052    }
02053    return 1;
02054 }
02055 
02056 static int gtalk_load_config(void)
02057 {
02058    char *cat = NULL;
02059    struct ast_config *cfg = NULL;
02060    char context[AST_MAX_CONTEXT];
02061    char parkinglot[AST_MAX_CONTEXT];
02062    int allowguest = 1;
02063    struct ast_variable *var;
02064    struct gtalk *member;
02065    struct ast_codec_pref prefs;
02066    struct aji_client_container *clients;
02067    struct gtalk_candidate *global_candidates = NULL;
02068    struct hostent *hp;
02069    struct ast_hostent ahp;
02070    struct ast_flags config_flags = { 0 };
02071 
02072    cfg = ast_config_load(GOOGLE_CONFIG, config_flags);
02073    if (!cfg) {
02074       return 0;
02075    } else if (cfg == CONFIG_STATUS_FILEINVALID) {
02076       ast_log(LOG_ERROR, "Config file %s is in an invalid format.  Aborting.\n", GOOGLE_CONFIG);
02077       return 0;
02078    }
02079 
02080    /* Copy the default jb config over global_jbconf */
02081    memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
02082 
02083    /* set defaults */
02084    memset(&stunaddr, 0, sizeof(stunaddr));
02085 
02086    cat = ast_category_browse(cfg, NULL);
02087    for (var = ast_variable_browse(cfg, "general"); var; var = var->next) {
02088       /* handle jb conf */
02089       if (!ast_jb_read_conf(&global_jbconf, var->name, var->value))
02090          continue;
02091 
02092       if (!strcasecmp(var->name, "allowguest")) {
02093          allowguest = (ast_true(ast_variable_retrieve(cfg, "general", "allowguest"))) ? 1 : 0;
02094       } else if (!strcasecmp(var->name, "disallow")) {
02095          ast_parse_allow_disallow(&prefs, &global_capability, var->value, 0);
02096       } else if (!strcasecmp(var->name, "allow")) {
02097          ast_parse_allow_disallow(&prefs, &global_capability, var->value, 1);
02098       } else if (!strcasecmp(var->name, "context")) {
02099          ast_copy_string(context, var->value, sizeof(context));
02100       } else if (!strcasecmp(var->name, "externip")) {
02101          ast_copy_string(externip, var->value, sizeof(externip));
02102       } else if (!strcasecmp(var->name, "parkinglot")) {
02103          ast_copy_string(parkinglot, var->value, sizeof(parkinglot));
02104       } else if (!strcasecmp(var->name, "bindaddr")) {
02105          if (!(hp = ast_gethostbyname(var->value, &ahp))) {
02106             ast_log(LOG_WARNING, "Invalid address: %s\n", var->value);
02107          } else {
02108             memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
02109          }
02110       } else if (!strcasecmp(var->name, "stunaddr")) {
02111          stunaddr.sin_port = htons(STANDARD_STUN_PORT);
02112          if (ast_parse_arg(var->value, PARSE_INADDR, &stunaddr)) {
02113             ast_log(LOG_WARNING, "Invalid STUN server address: %s\n", var->value);
02114          }
02115       }
02116    }
02117    while (cat) {
02118       if (strcasecmp(cat, "general")) {
02119          var = ast_variable_browse(cfg, cat);
02120          member = ast_calloc(1, sizeof(*member));
02121          ASTOBJ_INIT(member);
02122          ASTOBJ_WRLOCK(member);
02123          if (!strcasecmp(cat, "guest")) {
02124             ast_copy_string(member->name, "guest", sizeof(member->name));
02125             ast_copy_string(member->user, "guest", sizeof(member->user));
02126             ast_copy_string(member->context, context, sizeof(member->context));
02127             ast_copy_string(member->parkinglot, parkinglot, sizeof(member->parkinglot));
02128             member->allowguest = allowguest;
02129             member->prefs = prefs;
02130             while (var) {
02131                if (!strcasecmp(var->name, "disallow")) {
02132                   ast_parse_allow_disallow(&member->prefs, &member->capability,
02133                                      var->value, 0);
02134                } else if (!strcasecmp(var->name, "allow")) {
02135                   ast_parse_allow_disallow(&member->prefs, &member->capability,
02136                                      var->value, 1);
02137                } else if (!strcasecmp(var->name, "context")) {
02138                   ast_copy_string(member->context, var->value,
02139                               sizeof(member->context));
02140                } else if (!strcasecmp(var->name, "parkinglot")) {
02141                   ast_copy_string(member->parkinglot, var->value,
02142                               sizeof(member->parkinglot));
02143                }
02144                var = var->next;
02145             }
02146             ASTOBJ_UNLOCK(member);
02147             clients = ast_aji_get_clients();
02148             if (clients) {
02149                ASTOBJ_CONTAINER_TRAVERSE(clients, 1, {
02150                   ASTOBJ_WRLOCK(iterator);
02151                   ASTOBJ_WRLOCK(member);
02152                   member->connection = NULL;
02153                   iks_filter_add_rule(iterator->f, gtalk_parser, member, IKS_RULE_TYPE, IKS_PAK_IQ, IKS_RULE_NS, GOOGLE_NS, IKS_RULE_DONE);
02154                   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);
02155                   ASTOBJ_UNLOCK(member);
02156                   ASTOBJ_UNLOCK(iterator);
02157                });
02158                ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
02159                ASTOBJ_UNREF(member, gtalk_member_destroy);
02160             } else {
02161                ASTOBJ_UNLOCK(member);
02162                ASTOBJ_UNREF(member, gtalk_member_destroy);
02163             }
02164          } else {
02165             ASTOBJ_UNLOCK(member);
02166             if (gtalk_create_member(cat, var, allowguest, prefs, context, member))
02167                ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
02168             ASTOBJ_UNREF(member, gtalk_member_destroy);
02169          }
02170       }
02171       cat = ast_category_browse(cfg, cat);
02172    }
02173 
02174    gtalk_update_externip();
02175    gtalk_free_candidates(global_candidates);
02176    return 1;
02177 }
02178 
02179 /*! \brief Load module into PBX, register channel */
02180 static int load_module(void)
02181 {
02182    struct ast_sockaddr bindaddr_tmp;
02183    struct ast_sockaddr ourip_tmp;
02184 
02185    char *jabber_loaded = ast_module_helper("", "res_jabber.so", 0, 0, 0, 0);
02186    free(jabber_loaded);
02187    if (!jabber_loaded) {
02188       /* If embedded, check for a different module name */
02189       jabber_loaded = ast_module_helper("", "res_jabber", 0, 0, 0, 0);
02190       free(jabber_loaded);
02191       if (!jabber_loaded) {
02192          ast_log(LOG_ERROR, "chan_gtalk.so depends upon res_jabber.so\n");
02193          return AST_MODULE_LOAD_DECLINE;
02194       }
02195    }
02196 
02197    ASTOBJ_CONTAINER_INIT(&gtalk_list);
02198    if (!gtalk_load_config()) {
02199       ast_log(LOG_ERROR, "Unable to read config file %s. Not loading module.\n", GOOGLE_CONFIG);
02200       return 0;
02201    }
02202 
02203    sched = sched_context_create();
02204    if (!sched) {
02205       ast_log(LOG_WARNING, "Unable to create schedule context\n");
02206    }
02207 
02208    io = io_context_create();
02209    if (!io) {
02210       ast_log(LOG_WARNING, "Unable to create I/O context\n");
02211    }
02212 
02213    ast_sockaddr_from_sin(&bindaddr_tmp, &bindaddr);
02214    if (gtalk_get_local_ip(&ourip_tmp)) {
02215       ast_log(LOG_WARNING, "Unable to get own IP address, Gtalk disabled\n");
02216       return 0;
02217    }
02218    __ourip.s_addr = htonl(ast_sockaddr_ipv4(&ourip_tmp));
02219 
02220    ast_rtp_glue_register(&gtalk_rtp_glue);
02221    ast_cli_register_multiple(gtalk_cli, ARRAY_LEN(gtalk_cli));
02222 
02223    /* Make sure we can register our channel type */
02224    if (ast_channel_register(&gtalk_tech)) {
02225       ast_log(LOG_ERROR, "Unable to register channel class %s\n", gtalk_tech.type);
02226       return -1;
02227    }
02228    return 0;
02229 }
02230 
02231 /*! \brief Reload module
02232  *  \todo XXX TODO make this work. */
02233 #if 0
02234 static int reload(void)
02235 {
02236    return 0;
02237 }
02238 #endif
02239 /*! \brief Unload the gtalk channel from Asterisk */
02240 static int unload_module(void)
02241 {
02242    struct gtalk_pvt *privates = NULL;
02243    ast_cli_unregister_multiple(gtalk_cli, ARRAY_LEN(gtalk_cli));
02244    /* First, take us out of the channel loop */
02245    ast_channel_unregister(&gtalk_tech);
02246    ast_rtp_glue_unregister(&gtalk_rtp_glue);
02247 
02248    if (!ast_mutex_lock(&gtalklock)) {
02249       /* Hangup all interfaces if they have an owner */
02250       ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
02251          ASTOBJ_WRLOCK(iterator);
02252          privates = iterator->p;
02253          while(privates) {
02254             if (privates->owner)
02255                ast_softhangup(privates->owner, AST_SOFTHANGUP_APPUNLOAD);
02256             privates = privates->next;
02257          }
02258          iterator->p = NULL;
02259          ASTOBJ_UNLOCK(iterator);
02260       });
02261       ast_mutex_unlock(&gtalklock);
02262    } else {
02263       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
02264       return -1;
02265    }
02266    ASTOBJ_CONTAINER_DESTROYALL(&gtalk_list, gtalk_member_destroy);
02267    ASTOBJ_CONTAINER_DESTROY(&gtalk_list);
02268    return 0;
02269 }
02270 
02271 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Gtalk Channel Driver",
02272       .load = load_module,
02273       .unload = unload_module,
02274       /* .reload = reload, */
02275       .load_pri = AST_MODPRI_CHANNEL_DRIVER,
02276       );

Generated on Wed Apr 6 11:29:41 2011 for Asterisk - The Open Source Telephony Project by  doxygen 1.4.7