Fri Jul 24 00:40:47 2009

Asterisk developer's documentation


chan_gtalk.c

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00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright (C) 1999 - 2005, Digium, Inc.
00005  *
00006  * Matt O'Gorman <mogorman@digium.com>
00007  *
00008  * See http://www.asterisk.org for more information about
00009  * the Asterisk project. Please do not directly contact
00010  * any of the maintainers of this project for assistance;
00011  * the project provides a web site, mailing lists and IRC
00012  * channels for your use.
00013  *
00014  * This program is free software, distributed under the terms of
00015  * the GNU General Public License Version 2. See the LICENSE file
00016  * at the top of the source tree.
00017  */
00018 
00019 /*! \file
00020  *
00021  * \author Matt O'Gorman <mogorman@digium.com>
00022  *
00023  * \brief Gtalk Channel Driver, until google/libjingle works with jingle spec
00024  * 
00025  * \ingroup channel_drivers
00026  */
00027 
00028 /*** MODULEINFO
00029    <depend>iksemel</depend>
00030    <depend>res_jabber</depend>
00031    <use>openssl</use>
00032  ***/
00033 
00034 #include "asterisk.h"
00035 
00036 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 185427 $")
00037 
00038 #include <sys/socket.h>
00039 #include <fcntl.h>
00040 #include <netdb.h>
00041 #include <netinet/in.h>
00042 #include <arpa/inet.h>
00043 #include <sys/signal.h>
00044 #include <iksemel.h>
00045 #include <pthread.h>
00046 
00047 #include "asterisk/lock.h"
00048 #include "asterisk/channel.h"
00049 #include "asterisk/config.h"
00050 #include "asterisk/module.h"
00051 #include "asterisk/pbx.h"
00052 #include "asterisk/sched.h"
00053 #include "asterisk/io.h"
00054 #include "asterisk/rtp.h"
00055 #include "asterisk/acl.h"
00056 #include "asterisk/callerid.h"
00057 #include "asterisk/file.h"
00058 #include "asterisk/cli.h"
00059 #include "asterisk/app.h"
00060 #include "asterisk/musiconhold.h"
00061 #include "asterisk/manager.h"
00062 #include "asterisk/stringfields.h"
00063 #include "asterisk/utils.h"
00064 #include "asterisk/causes.h"
00065 #include "asterisk/astobj.h"
00066 #include "asterisk/abstract_jb.h"
00067 #include "asterisk/jabber.h"
00068 
00069 #define GOOGLE_CONFIG "gtalk.conf"
00070 
00071 #define GOOGLE_NS "http://www.google.com/session"
00072 
00073 
00074 /*! Global jitterbuffer configuration - by default, jb is disabled */
00075 static struct ast_jb_conf default_jbconf =
00076 {
00077    .flags = 0,
00078    .max_size = -1,
00079    .resync_threshold = -1,
00080    .impl = ""
00081 };
00082 static struct ast_jb_conf global_jbconf;
00083 
00084 enum gtalk_protocol {
00085    AJI_PROTOCOL_UDP = 1,
00086    AJI_PROTOCOL_SSLTCP = 2,
00087 };
00088 
00089 enum gtalk_connect_type {
00090    AJI_CONNECT_STUN = 1,
00091    AJI_CONNECT_LOCAL = 2,
00092    AJI_CONNECT_RELAY = 3,
00093 };
00094 
00095 struct gtalk_pvt {
00096    ast_mutex_t lock;                /*!< Channel private lock */
00097    time_t laststun;
00098    struct gtalk *parent;            /*!< Parent client */
00099    char sid[100];
00100    char us[AJI_MAX_JIDLEN];
00101    char them[AJI_MAX_JIDLEN];
00102    char ring[10];                   /*!< Message ID of ring */
00103    iksrule *ringrule;               /*!< Rule for matching RING request */
00104    int initiator;                   /*!< If we're the initiator */
00105    int alreadygone;
00106    int capability;
00107    struct ast_codec_pref prefs;
00108    struct gtalk_candidate *theircandidates;
00109    struct gtalk_candidate *ourcandidates;
00110    char cid_num[80];                /*!< Caller ID num */
00111    char cid_name[80];               /*!< Caller ID name */
00112    char exten[80];                  /*!< Called extension */
00113    struct ast_channel *owner;       /*!< Master Channel */
00114    struct ast_rtp *rtp;             /*!< RTP audio session */
00115    struct ast_rtp *vrtp;            /*!< RTP video session */
00116    int jointcapability;             /*!< Supported capability at both ends (codecs ) */
00117    int peercapability;
00118    struct gtalk_pvt *next; /* Next entity */
00119 };
00120 
00121 struct gtalk_candidate {
00122    char name[100];
00123    enum gtalk_protocol protocol;
00124    double preference;
00125    char username[100];
00126    char password[100];
00127    enum gtalk_connect_type type;
00128    char network[6];
00129    int generation;
00130    char ip[16];
00131    int port;
00132    int receipt;
00133    struct gtalk_candidate *next;
00134 };
00135 
00136 struct gtalk {
00137    ASTOBJ_COMPONENTS(struct gtalk);
00138    struct aji_client *connection;
00139    struct aji_buddy *buddy;
00140    struct gtalk_pvt *p;
00141    struct ast_codec_pref prefs;
00142    int amaflags;        /*!< AMA Flags */
00143    char user[AJI_MAX_JIDLEN];
00144    char context[AST_MAX_CONTEXT];
00145    char parkinglot[AST_MAX_CONTEXT];   /*!<  Parkinglot */
00146    char accountcode[AST_MAX_ACCOUNT_CODE];   /*!< Account code */
00147    int capability;
00148    ast_group_t callgroup;  /*!< Call group */
00149    ast_group_t pickupgroup;   /*!< Pickup group */
00150    int callingpres;     /*!< Calling presentation */
00151    int allowguest;
00152    char language[MAX_LANGUAGE];  /*!<  Default language for prompts */
00153    char musicclass[MAX_MUSICCLASS]; /*!<  Music on Hold class */
00154 };
00155 
00156 struct gtalk_container {
00157    ASTOBJ_CONTAINER_COMPONENTS(struct gtalk);
00158 };
00159 
00160 static const char desc[] = "Gtalk Channel";
00161 
00162 static int global_capability = AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_GSM | AST_FORMAT_H263;
00163 
00164 AST_MUTEX_DEFINE_STATIC(gtalklock); /*!< Protect the interface list (of gtalk_pvt's) */
00165 
00166 /* Forward declarations */
00167 static struct ast_channel *gtalk_request(const char *type, int format, void *data, int *cause);
00168 static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration);
00169 static int gtalk_digit_begin(struct ast_channel *ast, char digit);
00170 static int gtalk_digit_end(struct ast_channel *ast, char digit, unsigned int duration);
00171 static int gtalk_call(struct ast_channel *ast, char *dest, int timeout);
00172 static int gtalk_hangup(struct ast_channel *ast);
00173 static int gtalk_answer(struct ast_channel *ast);
00174 static int gtalk_action(struct gtalk *client, struct gtalk_pvt *p, const char *action);
00175 static void gtalk_free_pvt(struct gtalk *client, struct gtalk_pvt *p);
00176 static int gtalk_newcall(struct gtalk *client, ikspak *pak);
00177 static struct ast_frame *gtalk_read(struct ast_channel *ast);
00178 static int gtalk_write(struct ast_channel *ast, struct ast_frame *f);
00179 static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen);
00180 static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
00181 static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen);
00182 static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid);
00183 static char *gtalk_do_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
00184 static char *gtalk_show_channels(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
00185 /*----- RTP interface functions */
00186 static int gtalk_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp,
00187                         struct ast_rtp *vrtp, struct ast_rtp *trtp, int codecs, int nat_active);
00188 static enum ast_rtp_get_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp);
00189 static int gtalk_get_codec(struct ast_channel *chan);
00190 
00191 /*! \brief PBX interface structure for channel registration */
00192 static const struct ast_channel_tech gtalk_tech = {
00193    .type = "Gtalk",
00194    .description = "Gtalk Channel Driver",
00195    .capabilities = AST_FORMAT_AUDIO_MASK,
00196    .requester = gtalk_request,
00197    .send_digit_begin = gtalk_digit_begin,
00198    .send_digit_end = gtalk_digit_end,
00199    .bridge = ast_rtp_bridge,
00200    .call = gtalk_call,
00201    .hangup = gtalk_hangup,
00202    .answer = gtalk_answer,
00203    .read = gtalk_read,
00204    .write = gtalk_write,
00205    .exception = gtalk_read,
00206    .indicate = gtalk_indicate,
00207    .fixup = gtalk_fixup,
00208    .send_html = gtalk_sendhtml,
00209    .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER
00210 };
00211 
00212 static struct sockaddr_in bindaddr = { 0, }; /*!< The address we bind to */
00213 
00214 static struct sched_context *sched; /*!< The scheduling context */
00215 static struct io_context *io; /*!< The IO context */
00216 static struct in_addr __ourip;
00217 
00218 /*! \brief RTP driver interface */
00219 static struct ast_rtp_protocol gtalk_rtp = {
00220    type: "Gtalk",
00221    get_rtp_info: gtalk_get_rtp_peer,
00222    set_rtp_peer: gtalk_set_rtp_peer,
00223    get_codec: gtalk_get_codec,
00224 };
00225 
00226 static struct ast_cli_entry gtalk_cli[] = {
00227    AST_CLI_DEFINE(gtalk_do_reload, "Reload GoogleTalk configuration"),
00228    AST_CLI_DEFINE(gtalk_show_channels, "Show GoogleTalk channels"),
00229 };
00230 
00231 static char externip[16];
00232 
00233 static struct gtalk_container gtalk_list;
00234 
00235 static void gtalk_member_destroy(struct gtalk *obj)
00236 {
00237    ast_free(obj);
00238 }
00239 
00240 static struct gtalk *find_gtalk(char *name, char *connection)
00241 {
00242    struct gtalk *gtalk = NULL;
00243    char *domain = NULL , *s = NULL;
00244 
00245    if (strchr(connection, '@')) {
00246       s = ast_strdupa(connection);
00247       domain = strsep(&s, "@");
00248       ast_verbose("OOOOH domain = %s\n", domain);
00249    }
00250    gtalk = ASTOBJ_CONTAINER_FIND(&gtalk_list, name);
00251    if (!gtalk && strchr(name, '@'))
00252       gtalk = ASTOBJ_CONTAINER_FIND_FULL(&gtalk_list, name, user,,, strcasecmp);
00253 
00254    if (!gtalk) {           
00255       /* guest call */
00256       ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
00257          ASTOBJ_RDLOCK(iterator);
00258          if (!strcasecmp(iterator->name, "guest")) {
00259             gtalk = iterator;
00260          }
00261          ASTOBJ_UNLOCK(iterator);
00262 
00263          if (gtalk)
00264             break;
00265       });
00266 
00267    }
00268    return gtalk;
00269 }
00270 
00271 
00272 static int add_codec_to_answer(const struct gtalk_pvt *p, int codec, iks *dcodecs)
00273 {
00274    int res = 0;
00275    char *format = ast_getformatname(codec);
00276 
00277    if (!strcasecmp("ulaw", format)) {
00278       iks *payload_eg711u, *payload_pcmu;
00279       payload_pcmu = iks_new("payload-type");
00280       payload_eg711u = iks_new("payload-type");
00281    
00282       if(!payload_eg711u || !payload_pcmu) {
00283          iks_delete(payload_pcmu);
00284          iks_delete(payload_eg711u);
00285          ast_log(LOG_WARNING,"Failed to allocate iks node");
00286          return -1;
00287       }
00288       iks_insert_attrib(payload_pcmu, "id", "0");
00289       iks_insert_attrib(payload_pcmu, "name", "PCMU");
00290       iks_insert_attrib(payload_pcmu, "clockrate","8000");
00291       iks_insert_attrib(payload_pcmu, "bitrate","64000");
00292       iks_insert_attrib(payload_eg711u, "id", "100");
00293       iks_insert_attrib(payload_eg711u, "name", "EG711U");
00294       iks_insert_attrib(payload_eg711u, "clockrate","8000");
00295       iks_insert_attrib(payload_eg711u, "bitrate","64000");
00296       iks_insert_node(dcodecs, payload_pcmu);
00297       iks_insert_node(dcodecs, payload_eg711u);
00298       res ++;
00299    }
00300    if (!strcasecmp("alaw", format)) {
00301       iks *payload_eg711a, *payload_pcma;
00302       payload_pcma = iks_new("payload-type");
00303       payload_eg711a = iks_new("payload-type");
00304       if(!payload_eg711a || !payload_pcma) {
00305          iks_delete(payload_eg711a);
00306          iks_delete(payload_pcma);
00307          ast_log(LOG_WARNING,"Failed to allocate iks node");
00308          return -1;
00309       }
00310       iks_insert_attrib(payload_pcma, "id", "8");
00311       iks_insert_attrib(payload_pcma, "name", "PCMA");
00312       iks_insert_attrib(payload_pcma, "clockrate","8000");
00313       iks_insert_attrib(payload_pcma, "bitrate","64000");
00314       payload_eg711a = iks_new("payload-type");
00315       iks_insert_attrib(payload_eg711a, "id", "101");
00316       iks_insert_attrib(payload_eg711a, "name", "EG711A");
00317       iks_insert_attrib(payload_eg711a, "clockrate","8000");
00318       iks_insert_attrib(payload_eg711a, "bitrate","64000");
00319       iks_insert_node(dcodecs, payload_pcma);
00320       iks_insert_node(dcodecs, payload_eg711a);
00321       res ++;
00322    }
00323    if (!strcasecmp("ilbc", format)) {
00324       iks *payload_ilbc = iks_new("payload-type");
00325       if(!payload_ilbc) {
00326          ast_log(LOG_WARNING,"Failed to allocate iks node");
00327          return -1;
00328       }
00329       iks_insert_attrib(payload_ilbc, "id", "97");
00330       iks_insert_attrib(payload_ilbc, "name", "iLBC");
00331       iks_insert_attrib(payload_ilbc, "clockrate","8000");
00332       iks_insert_attrib(payload_ilbc, "bitrate","13300");
00333       iks_insert_node(dcodecs, payload_ilbc);
00334       res ++;
00335    }
00336    if (!strcasecmp("g723", format)) {
00337       iks *payload_g723 = iks_new("payload-type");
00338       if(!payload_g723) {
00339          ast_log(LOG_WARNING,"Failed to allocate iks node");
00340          return -1;
00341       }
00342       iks_insert_attrib(payload_g723, "id", "4");
00343       iks_insert_attrib(payload_g723, "name", "G723");
00344       iks_insert_attrib(payload_g723, "clockrate","8000");
00345       iks_insert_attrib(payload_g723, "bitrate","6300");
00346       iks_insert_node(dcodecs, payload_g723);
00347       res ++;
00348    }
00349    if (!strcasecmp("speex", format)) {
00350       iks *payload_speex = iks_new("payload-type");
00351       if(!payload_speex) {
00352          ast_log(LOG_WARNING,"Failed to allocate iks node");
00353          return -1;
00354       }
00355       iks_insert_attrib(payload_speex, "id", "110");
00356       iks_insert_attrib(payload_speex, "name", "speex");
00357       iks_insert_attrib(payload_speex, "clockrate","8000");
00358       iks_insert_attrib(payload_speex, "bitrate","11000");
00359       iks_insert_node(dcodecs, payload_speex);
00360       res++;
00361    }
00362    if (!strcasecmp("gsm", format)) {
00363       iks *payload_gsm = iks_new("payload-type");
00364       if(!payload_gsm) {
00365          ast_log(LOG_WARNING,"Failed to allocate iks node");
00366          return -1;
00367       }
00368       iks_insert_attrib(payload_gsm, "id", "103");
00369       iks_insert_attrib(payload_gsm, "name", "gsm");
00370       iks_insert_node(dcodecs, payload_gsm);
00371       res++;
00372    }
00373    ast_rtp_lookup_code(p->rtp, 1, codec);
00374    return res;
00375 }
00376 
00377 static int gtalk_invite(struct gtalk_pvt *p, char *to, char *from, char *sid, int initiator)
00378 {
00379    struct gtalk *client = p->parent;
00380    iks *iq, *gtalk, *dcodecs, *payload_telephone, *transport;
00381    int x;
00382    int pref_codec = 0;
00383    int alreadysent = 0;
00384    int codecs_num = 0;
00385 
00386    iq = iks_new("iq");
00387    gtalk = iks_new("session");
00388    dcodecs = iks_new("description");
00389    transport = iks_new("transport");
00390    payload_telephone = iks_new("payload-type");
00391    if (!(iq && gtalk && dcodecs && transport && payload_telephone)){
00392       iks_delete(iq);
00393       iks_delete(gtalk);
00394       iks_delete(dcodecs);
00395       iks_delete(transport);
00396       iks_delete(payload_telephone);
00397       
00398       ast_log(LOG_ERROR, "Could not allocate iksemel nodes\n");
00399       return 0;
00400    }
00401    iks_insert_attrib(dcodecs, "xmlns", "http://www.google.com/session/phone");
00402    iks_insert_attrib(dcodecs, "xml:lang", "en");
00403 
00404    for (x = 0; x < 32; x++) {
00405       if (!(pref_codec = ast_codec_pref_index(&client->prefs, x)))
00406          break;
00407       if (!(client->capability & pref_codec))
00408          continue;
00409       if (alreadysent & pref_codec)
00410          continue;
00411       codecs_num = add_codec_to_answer(p, pref_codec, dcodecs);
00412       alreadysent |= pref_codec;
00413    }
00414    
00415    if (codecs_num) {
00416       /* only propose DTMF within an audio session */
00417       iks_insert_attrib(payload_telephone, "id", "106");
00418       iks_insert_attrib(payload_telephone, "name", "telephone-event");
00419       iks_insert_attrib(payload_telephone, "clockrate", "8000");
00420    }
00421    iks_insert_attrib(transport,"xmlns","http://www.google.com/transport/p2p");
00422    
00423    iks_insert_attrib(iq, "type", "set");
00424    iks_insert_attrib(iq, "to", to);
00425    iks_insert_attrib(iq, "from", from);
00426    iks_insert_attrib(iq, "id", client->connection->mid);
00427    ast_aji_increment_mid(client->connection->mid);
00428 
00429    iks_insert_attrib(gtalk, "xmlns", "http://www.google.com/session");
00430    iks_insert_attrib(gtalk, "type",initiator ? "initiate": "accept");
00431    iks_insert_attrib(gtalk, "initiator", initiator ? from : to);
00432    iks_insert_attrib(gtalk, "id", sid);
00433    iks_insert_node(iq, gtalk);
00434    iks_insert_node(gtalk, dcodecs);
00435    iks_insert_node(gtalk, transport);
00436    iks_insert_node(dcodecs, payload_telephone);
00437 
00438    ast_aji_send(client->connection, iq);
00439 
00440    iks_delete(payload_telephone);
00441    iks_delete(transport);
00442    iks_delete(dcodecs);
00443    iks_delete(gtalk);
00444    iks_delete(iq);
00445    return 1;
00446 }
00447 
00448 static int gtalk_invite_response(struct gtalk_pvt *p, char *to , char *from, char *sid, int initiator)
00449 {
00450    iks *iq, *session, *transport;
00451    iq = iks_new("iq");
00452    session = iks_new("session");
00453    transport = iks_new("transport");
00454    if(!(iq && session && transport)) {
00455       iks_delete(iq);
00456       iks_delete(session);
00457       iks_delete(transport);
00458       ast_log(LOG_ERROR, " Unable to allocate IKS node\n");
00459       return -1;
00460    }
00461    iks_insert_attrib(iq, "from", from);
00462    iks_insert_attrib(iq, "to", to);
00463    iks_insert_attrib(iq, "type", "set");
00464    iks_insert_attrib(iq, "id",p->parent->connection->mid);
00465    ast_aji_increment_mid(p->parent->connection->mid);
00466    iks_insert_attrib(session, "type", "transport-accept");
00467    iks_insert_attrib(session, "id", sid);
00468    iks_insert_attrib(session, "initiator", initiator ? from : to);
00469    iks_insert_attrib(session, "xmlns", "http://www.google.com/session");
00470    iks_insert_attrib(transport, "xmlns", "http://www.google.com/transport/p2p");
00471    iks_insert_node(iq,session);
00472    iks_insert_node(session,transport);
00473    ast_aji_send(p->parent->connection, iq);
00474 
00475    iks_delete(transport);
00476    iks_delete(session);
00477    iks_delete(iq);
00478    return 1;
00479 
00480 }
00481 
00482 static int gtalk_ringing_ack(void *data, ikspak *pak)
00483 {
00484    struct gtalk_pvt *p = data;
00485 
00486    if (p->ringrule)
00487       iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
00488    p->ringrule = NULL;
00489    if (p->owner)
00490       ast_queue_control(p->owner, AST_CONTROL_RINGING);
00491    return IKS_FILTER_EAT;
00492 }
00493 
00494 static int gtalk_answer(struct ast_channel *ast)
00495 {
00496    struct gtalk_pvt *p = ast->tech_pvt;
00497    int res = 0;
00498    
00499    ast_debug(1, "Answer!\n");
00500    ast_mutex_lock(&p->lock);
00501    gtalk_invite(p, p->them, p->us,p->sid, 0);
00502    manager_event(EVENT_FLAG_SYSTEM, "ChannelUpdate", "Channel: %s\r\nChanneltype: %s\r\nGtalk-SID: %s\r\n",
00503       ast->name, "GTALK", p->sid);
00504    ast_mutex_unlock(&p->lock);
00505    return res;
00506 }
00507 
00508 static enum ast_rtp_get_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp)
00509 {
00510    struct gtalk_pvt *p = chan->tech_pvt;
00511    enum ast_rtp_get_result res = AST_RTP_GET_FAILED;
00512 
00513    if (!p)
00514       return res;
00515 
00516    ast_mutex_lock(&p->lock);
00517    if (p->rtp){
00518       *rtp = p->rtp;
00519       res = AST_RTP_TRY_PARTIAL;
00520    }
00521    ast_mutex_unlock(&p->lock);
00522 
00523    return res;
00524 }
00525 
00526 static int gtalk_get_codec(struct ast_channel *chan)
00527 {
00528    struct gtalk_pvt *p = chan->tech_pvt;
00529    return p->peercapability;
00530 }
00531 
00532 static int gtalk_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp, struct ast_rtp *trtp, int codecs, int nat_active)
00533 {
00534    struct gtalk_pvt *p;
00535 
00536    p = chan->tech_pvt;
00537    if (!p)
00538       return -1;
00539    ast_mutex_lock(&p->lock);
00540 
00541 /* if (rtp)
00542       ast_rtp_get_peer(rtp, &p->redirip);
00543    else
00544       memset(&p->redirip, 0, sizeof(p->redirip));
00545    p->redircodecs = codecs; */
00546 
00547    /* Reset lastrtprx timer */
00548    ast_mutex_unlock(&p->lock);
00549    return 0;
00550 }
00551 
00552 static int gtalk_response(struct gtalk *client, char *from, ikspak *pak, const char *reasonstr, const char *reasonstr2)
00553 {
00554    iks *response = NULL, *error = NULL, *reason = NULL;
00555    int res = -1;
00556 
00557    response = iks_new("iq");
00558    if (response) {
00559       iks_insert_attrib(response, "type", "result");
00560       iks_insert_attrib(response, "from", from);
00561       iks_insert_attrib(response, "to", iks_find_attrib(pak->x, "from"));
00562       iks_insert_attrib(response, "id", iks_find_attrib(pak->x, "id"));
00563       if (reasonstr) {
00564          error = iks_new("error");
00565          if (error) {
00566             iks_insert_attrib(error, "type", "cancel");
00567             reason = iks_new(reasonstr);
00568             if (reason)
00569                iks_insert_node(error, reason);
00570             iks_insert_node(response, error);
00571          }
00572       }
00573       ast_aji_send(client->connection, response);
00574       res = 0;
00575    }
00576 
00577    iks_delete(reason);
00578    iks_delete(error);
00579    iks_delete(response);
00580 
00581    return res;
00582 }
00583 
00584 static int gtalk_is_answered(struct gtalk *client, ikspak *pak)
00585 {
00586    struct gtalk_pvt *tmp;
00587    char *from;
00588    iks *codec;
00589    char s1[BUFSIZ], s2[BUFSIZ], s3[BUFSIZ];
00590    int peernoncodeccapability;
00591 
00592    ast_log(LOG_DEBUG, "The client is %s\n", client->name);
00593    /* Make sure our new call doesn't exist yet */
00594    for (tmp = client->p; tmp; tmp = tmp->next) {
00595       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
00596          break;
00597    }
00598 
00599    /* codec points to the first <payload-type/> tag */
00600    codec = iks_first_tag(iks_first_tag(iks_first_tag(pak->x)));
00601    while (codec) {
00602       ast_rtp_set_m_type(tmp->rtp, atoi(iks_find_attrib(codec, "id")));
00603       ast_rtp_set_rtpmap_type(tmp->rtp, atoi(iks_find_attrib(codec, "id")), "audio", iks_find_attrib(codec, "name"), 0);
00604       codec = iks_next_tag(codec);
00605    }
00606    
00607    /* Now gather all of the codecs that we are asked for */
00608    ast_rtp_get_current_formats(tmp->rtp, &tmp->peercapability, &peernoncodeccapability);
00609    
00610    /* at this point, we received an awser from the remote Gtalk client,
00611       which allows us to compare capabilities */
00612    tmp->jointcapability = tmp->capability & tmp->peercapability;
00613    if (!tmp->jointcapability) {
00614       ast_log(LOG_WARNING, "Capabilities don't match : us - %s, peer - %s, combined - %s \n", ast_getformatname_multiple(s1, BUFSIZ, tmp->capability),
00615          ast_getformatname_multiple(s2, BUFSIZ, tmp->peercapability),
00616          ast_getformatname_multiple(s3, BUFSIZ, tmp->jointcapability));
00617       /* close session if capabilities don't match */
00618       ast_queue_hangup(tmp->owner);
00619 
00620       return -1;
00621 
00622    }  
00623    
00624    from = iks_find_attrib(pak->x, "to");
00625    if(!from)
00626       from = client->connection->jid->full;
00627 
00628    if (tmp) {
00629       if (tmp->owner)
00630          ast_queue_control(tmp->owner, AST_CONTROL_ANSWER);
00631    } else
00632       ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
00633    gtalk_response(client, from, pak, NULL, NULL);
00634    return 1;
00635 }
00636 
00637 static int gtalk_is_accepted(struct gtalk *client, ikspak *pak)
00638 {
00639    struct gtalk_pvt *tmp;
00640    char *from;
00641 
00642    ast_log(LOG_DEBUG, "The client is %s\n", client->name);
00643    /* find corresponding call */
00644    for (tmp = client->p; tmp; tmp = tmp->next) {
00645       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
00646          break;
00647    }
00648 
00649    from = iks_find_attrib(pak->x, "to");
00650    if(!from)
00651       from = client->connection->jid->full;
00652 
00653    if (!tmp)
00654       ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
00655 
00656    /* answer 'iq' packet to let the remote peer know that we're alive */
00657    gtalk_response(client, from, pak, NULL, NULL);
00658    return 1;
00659 }
00660 
00661 static int gtalk_handle_dtmf(struct gtalk *client, ikspak *pak)
00662 {
00663    struct gtalk_pvt *tmp;
00664    iks *dtmfnode = NULL, *dtmfchild = NULL;
00665    char *dtmf;
00666    char *from;
00667    /* Make sure our new call doesn't exist yet */
00668    for (tmp = client->p; tmp; tmp = tmp->next) {
00669       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) || iks_find_with_attrib(pak->x, "gtalk", "sid", tmp->sid))
00670          break;
00671    }
00672    from = iks_find_attrib(pak->x, "to");
00673    if(!from)
00674       from = client->connection->jid->full;
00675 
00676 
00677    if (tmp) {
00678       if(iks_find_with_attrib(pak->x, "dtmf-method", "method", "rtp")) {
00679          gtalk_response(client, from, pak,
00680                "feature-not-implemented xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'",
00681                "unsupported-dtmf-method xmlns='http://jabber.org/protocol/gtalk/info/dtmf#errors'");
00682          return -1;
00683       }
00684       if ((dtmfnode = iks_find(pak->x, "dtmf"))) {
00685          if((dtmf = iks_find_attrib(dtmfnode, "code"))) {
00686             if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-up")) {
00687                struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
00688                f.subclass = dtmf[0];
00689                ast_queue_frame(tmp->owner, &f);
00690                ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
00691             } else if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-down")) {
00692                struct ast_frame f = {AST_FRAME_DTMF_END, };
00693                f.subclass = dtmf[0];
00694                ast_queue_frame(tmp->owner, &f);
00695                ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
00696             } else if(iks_find_attrib(pak->x, "dtmf")) { /* 250 millasecond default */
00697                struct ast_frame f = {AST_FRAME_DTMF, };
00698                f.subclass = dtmf[0];
00699                ast_queue_frame(tmp->owner, &f);
00700                ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
00701             }
00702          }
00703       } else if ((dtmfnode = iks_find_with_attrib(pak->x, "gtalk", "action", "session-info"))) {
00704          if((dtmfchild = iks_find(dtmfnode, "dtmf"))) {
00705             if((dtmf = iks_find_attrib(dtmfchild, "code"))) {
00706                if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-up")) {
00707                   struct ast_frame f = {AST_FRAME_DTMF_END, };
00708                   f.subclass = dtmf[0];
00709                   ast_queue_frame(tmp->owner, &f);
00710                   ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
00711                } else if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-down")) {
00712                   struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
00713                   f.subclass = dtmf[0];
00714                   ast_queue_frame(tmp->owner, &f);
00715                   ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass);
00716                }
00717             }
00718          }
00719       }
00720       gtalk_response(client, from, pak, NULL, NULL);
00721       return 1;
00722    } else
00723       ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
00724 
00725    gtalk_response(client, from, pak, NULL, NULL);
00726    return 1;
00727 }
00728 
00729 static int gtalk_hangup_farend(struct gtalk *client, ikspak *pak)
00730 {
00731    struct gtalk_pvt *tmp;
00732    char *from;
00733 
00734    ast_debug(1, "The client is %s\n", client->name);
00735    /* Make sure our new call doesn't exist yet */
00736    for (tmp = client->p; tmp; tmp = tmp->next) {
00737       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid))
00738          break;
00739    }
00740    from = iks_find_attrib(pak->x, "to");
00741    if(!from)
00742       from = client->connection->jid->full;
00743 
00744    if (tmp) {
00745       tmp->alreadygone = 1;
00746       if (tmp->owner)
00747          ast_queue_hangup(tmp->owner);
00748    } else
00749       ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
00750    gtalk_response(client, from, pak, NULL, NULL);
00751    return 1;
00752 }
00753 
00754 static int gtalk_create_candidates(struct gtalk *client, struct gtalk_pvt *p, char *sid, char *from, char *to)
00755 {
00756    struct gtalk_candidate *tmp;
00757    struct aji_client *c = client->connection;
00758    struct gtalk_candidate *ours1 = NULL, *ours2 = NULL;
00759    struct sockaddr_in sin;
00760    struct sockaddr_in dest;
00761    struct in_addr us;
00762    iks *iq, *gtalk, *candidate, *transport;
00763    char user[17], pass[17], preference[5], port[7];
00764 
00765 
00766    iq = iks_new("iq");
00767    gtalk = iks_new("session");
00768    candidate = iks_new("candidate");
00769    transport = iks_new("transport");
00770    if (!iq || !gtalk || !candidate || !transport) {
00771       ast_log(LOG_ERROR, "Memory allocation error\n");
00772       goto safeout;
00773    }
00774    ours1 = ast_calloc(1, sizeof(*ours1));
00775    ours2 = ast_calloc(1, sizeof(*ours2));
00776    if (!ours1 || !ours2)
00777       goto safeout;
00778 
00779    iks_insert_attrib(transport, "xmlns","http://www.google.com/transport/p2p");
00780    iks_insert_node(iq, gtalk);
00781    iks_insert_node(gtalk,transport);
00782    iks_insert_node(transport, candidate);
00783 
00784    for (; p; p = p->next) {
00785       if (!strcasecmp(p->sid, sid))
00786          break;
00787    }
00788 
00789    if (!p) {
00790       ast_log(LOG_NOTICE, "No matching gtalk session - SID %s!\n", sid);
00791       goto safeout;
00792    }
00793 
00794    ast_rtp_get_us(p->rtp, &sin);
00795    ast_find_ourip(&us, bindaddr);
00796 
00797    /* Setup our gtalk candidates */
00798    ast_copy_string(ours1->name, "rtp", sizeof(ours1->name));
00799    ours1->port = ntohs(sin.sin_port);
00800    ours1->preference = 1;
00801    snprintf(user, sizeof(user), "%08lx%08lx", ast_random(), ast_random());
00802    snprintf(pass, sizeof(pass), "%08lx%08lx", ast_random(), ast_random());
00803    ast_copy_string(ours1->username, user, sizeof(ours1->username));
00804    ast_copy_string(ours1->password, pass, sizeof(ours1->password));
00805    ast_copy_string(ours1->ip, ast_inet_ntoa(us), sizeof(ours1->ip));
00806    ours1->protocol = AJI_PROTOCOL_UDP;
00807    ours1->type = AJI_CONNECT_LOCAL;
00808    ours1->generation = 0;
00809    p->ourcandidates = ours1;
00810 
00811    if (!ast_strlen_zero(externip)) {
00812       /* XXX We should really stun for this one not just go with externip XXX */
00813       snprintf(user, sizeof(user), "%08lx%08lx", ast_random(), ast_random());
00814       snprintf(pass, sizeof(pass), "%08lx%08lx", ast_random(), ast_random());
00815       ast_copy_string(ours2->username, user, sizeof(ours2->username));
00816       ast_copy_string(ours2->password, pass, sizeof(ours2->password));
00817       ast_copy_string(ours2->ip, externip, sizeof(ours2->ip));
00818       ast_copy_string(ours2->name, "rtp", sizeof(ours1->name));
00819       ours2->port = ntohs(sin.sin_port);
00820       ours2->preference = 0.9;
00821       ours2->protocol = AJI_PROTOCOL_UDP;
00822       ours2->type = AJI_CONNECT_STUN;
00823       ours2->generation = 0;
00824       ours1->next = ours2;
00825       ours2 = NULL;
00826    }
00827    ours1 = NULL;
00828    dest.sin_addr = __ourip;
00829    dest.sin_port = sin.sin_port;
00830 
00831 
00832    for (tmp = p->ourcandidates; tmp; tmp = tmp->next) {
00833       snprintf(port, sizeof(port), "%d", tmp->port);
00834       snprintf(preference, sizeof(preference), "%.2f", tmp->preference);
00835       iks_insert_attrib(iq, "from", to);
00836       iks_insert_attrib(iq, "to", from);
00837       iks_insert_attrib(iq, "type", "set");
00838       iks_insert_attrib(iq, "id", c->mid);
00839       ast_aji_increment_mid(c->mid);
00840       iks_insert_attrib(gtalk, "type", "transport-info");
00841       iks_insert_attrib(gtalk, "id", sid);
00842       iks_insert_attrib(gtalk, "initiator", (p->initiator) ? to : from);
00843       iks_insert_attrib(gtalk, "xmlns", GOOGLE_NS);
00844       iks_insert_attrib(candidate, "name", tmp->name);
00845       iks_insert_attrib(candidate, "address", tmp->ip);
00846       iks_insert_attrib(candidate, "port", port);
00847       iks_insert_attrib(candidate, "username", tmp->username);
00848       iks_insert_attrib(candidate, "password", tmp->password);
00849       iks_insert_attrib(candidate, "preference", preference);
00850       if (tmp->protocol == AJI_PROTOCOL_UDP)
00851          iks_insert_attrib(candidate, "protocol", "udp");
00852       if (tmp->protocol == AJI_PROTOCOL_SSLTCP)
00853          iks_insert_attrib(candidate, "protocol", "ssltcp");
00854       if (tmp->type == AJI_CONNECT_STUN)
00855          iks_insert_attrib(candidate, "type", "stun");
00856       if (tmp->type == AJI_CONNECT_LOCAL)
00857          iks_insert_attrib(candidate, "type", "local");
00858       if (tmp->type == AJI_CONNECT_RELAY)
00859          iks_insert_attrib(candidate, "type", "relay");
00860       iks_insert_attrib(candidate, "network", "0");
00861       iks_insert_attrib(candidate, "generation", "0");
00862       ast_aji_send(c, iq);
00863    }
00864    p->laststun = 0;
00865 
00866 safeout:
00867    if (ours1)
00868       ast_free(ours1);
00869    if (ours2)
00870       ast_free(ours2);
00871    iks_delete(iq);
00872    iks_delete(gtalk);
00873    iks_delete(candidate);
00874    iks_delete(transport);
00875 
00876    return 1;
00877 }
00878 
00879 static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid)
00880 {
00881    struct gtalk_pvt *tmp = NULL;
00882    struct aji_resource *resources = NULL;
00883    struct aji_buddy *buddy;
00884    char idroster[200];
00885    char *data, *exten = NULL;
00886 
00887    ast_debug(1, "The client is %s for alloc\n", client->name);
00888    if (!sid && !strchr(them, '/')) {   /* I started call! */
00889       if (!strcasecmp(client->name, "guest")) {
00890          buddy = ASTOBJ_CONTAINER_FIND(&client->connection->buddies, them);
00891          if (buddy)
00892             resources = buddy->resources;
00893       } else if (client->buddy)
00894          resources = client->buddy->resources;
00895       while (resources) {
00896          if (resources->cap->jingle) {
00897             break;
00898          }
00899          resources = resources->next;
00900       }
00901       if (resources)
00902          snprintf(idroster, sizeof(idroster), "%s/%s", them, resources->resource);
00903       else {
00904          ast_log(LOG_ERROR, "no gtalk capable clients to talk to.\n");
00905          return NULL;
00906       }
00907    }
00908    if (!(tmp = ast_calloc(1, sizeof(*tmp)))) {
00909       return NULL;
00910    }
00911 
00912    memcpy(&tmp->prefs, &client->prefs, sizeof(struct ast_codec_pref));
00913 
00914    if (sid) {
00915       ast_copy_string(tmp->sid, sid, sizeof(tmp->sid));
00916       ast_copy_string(tmp->them, them, sizeof(tmp->them));
00917       ast_copy_string(tmp->us, us, sizeof(tmp->us));
00918    } else {
00919       snprintf(tmp->sid, sizeof(tmp->sid), "%08lx%08lx", ast_random(), ast_random());
00920       ast_copy_string(tmp->them, idroster, sizeof(tmp->them));
00921       ast_copy_string(tmp->us, us, sizeof(tmp->us));
00922       tmp->initiator = 1;
00923    }
00924    /* clear codecs */
00925    tmp->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, bindaddr.sin_addr);
00926    ast_rtp_pt_clear(tmp->rtp);
00927 
00928    /* add user configured codec capabilites */
00929    if (client->capability)
00930       tmp->capability = client->capability;
00931    else if (global_capability)
00932       tmp->capability = global_capability;
00933 
00934    tmp->parent = client;
00935    if (!tmp->rtp) {
00936       ast_log(LOG_WARNING, "Out of RTP sessions?\n");
00937       ast_free(tmp);
00938       return NULL;
00939    }
00940 
00941    /* Set CALLERID(name) to the full JID of the remote peer */
00942    ast_copy_string(tmp->cid_name, tmp->them, sizeof(tmp->cid_name));
00943 
00944    if(strchr(tmp->us, '/')) {
00945       data = ast_strdupa(tmp->us);
00946       exten = strsep(&data, "/");
00947    } else
00948       exten = tmp->us;
00949    ast_copy_string(tmp->exten,  exten, sizeof(tmp->exten));
00950    ast_mutex_init(&tmp->lock);
00951    ast_mutex_lock(&gtalklock);
00952    tmp->next = client->p;
00953    client->p = tmp;
00954    ast_mutex_unlock(&gtalklock);
00955    return tmp;
00956 }
00957 
00958 /*! \brief Start new gtalk channel */
00959 static struct ast_channel *gtalk_new(struct gtalk *client, struct gtalk_pvt *i, int state, const char *title)
00960 {
00961    struct ast_channel *tmp;
00962    int fmt;
00963    int what;
00964    const char *n2;
00965 
00966    if (title)
00967       n2 = title;
00968    else
00969       n2 = i->us;
00970    tmp = ast_channel_alloc(1, state, i->cid_num, i->cid_name, client->accountcode, i->exten, client->context, client->amaflags, "Gtalk/%s-%04lx", n2, ast_random() & 0xffff);
00971    if (!tmp) {
00972       ast_log(LOG_WARNING, "Unable to allocate Gtalk channel structure!\n");
00973       return NULL;
00974    }
00975    tmp->tech = &gtalk_tech;
00976 
00977    /* Select our native format based on codec preference until we receive
00978       something from another device to the contrary. */
00979    if (i->jointcapability)
00980       what = i->jointcapability;
00981    else if (i->capability)
00982       what = i->capability;
00983    else
00984       what = global_capability;
00985 
00986    /* Set Frame packetization */
00987    if (i->rtp)
00988       ast_rtp_codec_setpref(i->rtp, &i->prefs);
00989 
00990    tmp->nativeformats = ast_codec_choose(&i->prefs, what, 1) | (i->jointcapability & AST_FORMAT_VIDEO_MASK);
00991    fmt = ast_best_codec(tmp->nativeformats);
00992 
00993    if (i->rtp) {
00994       ast_rtp_setstun(i->rtp, 1);
00995       ast_channel_set_fd(tmp, 0, ast_rtp_fd(i->rtp));
00996       ast_channel_set_fd(tmp, 1, ast_rtcp_fd(i->rtp));
00997    }
00998    if (i->vrtp) {
00999       ast_rtp_setstun(i->rtp, 1);
01000       ast_channel_set_fd(tmp, 2, ast_rtp_fd(i->vrtp));
01001       ast_channel_set_fd(tmp, 3, ast_rtcp_fd(i->vrtp));
01002    }
01003    if (state == AST_STATE_RING)
01004       tmp->rings = 1;
01005    tmp->adsicpe = AST_ADSI_UNAVAILABLE;
01006    tmp->writeformat = fmt;
01007    tmp->rawwriteformat = fmt;
01008    tmp->readformat = fmt;
01009    tmp->rawreadformat = fmt;
01010    tmp->tech_pvt = i;
01011 
01012    tmp->callgroup = client->callgroup;
01013    tmp->pickupgroup = client->pickupgroup;
01014    tmp->cid.cid_pres = client->callingpres;
01015    if (!ast_strlen_zero(client->accountcode))
01016       ast_string_field_set(tmp, accountcode, client->accountcode);
01017    if (client->amaflags)
01018       tmp->amaflags = client->amaflags;
01019    if (!ast_strlen_zero(client->language))
01020       ast_string_field_set(tmp, language, client->language);
01021    if (!ast_strlen_zero(client->musicclass))
01022       ast_string_field_set(tmp, musicclass, client->musicclass);
01023    if (!ast_strlen_zero(client->parkinglot))
01024       ast_string_field_set(tmp, parkinglot, client->parkinglot);
01025    i->owner = tmp;
01026    ast_module_ref(ast_module_info->self);
01027    ast_copy_string(tmp->context, client->context, sizeof(tmp->context));
01028    ast_copy_string(tmp->exten, i->exten, sizeof(tmp->exten));
01029 
01030    if (!ast_strlen_zero(i->exten) && strcmp(i->exten, "s"))
01031       tmp->cid.cid_dnid = ast_strdup(i->exten);
01032    tmp->priority = 1;
01033    if (i->rtp)
01034       ast_jb_configure(tmp, &global_jbconf);
01035    if (state != AST_STATE_DOWN && ast_pbx_start(tmp)) {
01036       ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
01037       tmp->hangupcause = AST_CAUSE_SWITCH_CONGESTION;
01038       ast_hangup(tmp);
01039       tmp = NULL;
01040    } else {
01041       manager_event(EVENT_FLAG_SYSTEM, "ChannelUpdate",
01042          "Channel: %s\r\nChanneltype: %s\r\nGtalk-SID: %s\r\n",
01043          i->owner ? i->owner->name : "", "Gtalk", i->sid);
01044    }
01045    return tmp;
01046 }
01047 
01048 static int gtalk_action(struct gtalk *client, struct gtalk_pvt *p, const char *action)
01049 {
01050    iks *request, *session = NULL;
01051    int res = -1;
01052 
01053    request = iks_new("iq");
01054    if (request) {
01055       iks_insert_attrib(request, "type", "set");
01056       iks_insert_attrib(request, "from", p->us);
01057       iks_insert_attrib(request, "to", p->them);
01058       iks_insert_attrib(request, "id", client->connection->mid);
01059       ast_aji_increment_mid(client->connection->mid);
01060       session = iks_new("session");
01061       if (session) {
01062          iks_insert_attrib(session, "type", action);
01063          iks_insert_attrib(session, "id", p->sid);
01064          iks_insert_attrib(session, "initiator", p->initiator ? p->us : p->them);
01065          iks_insert_attrib(session, "xmlns", "http://www.google.com/session");
01066          iks_insert_node(request, session);
01067          ast_aji_send(client->connection, request);
01068          res = 0;
01069       }
01070    }
01071 
01072    iks_delete(session);
01073    iks_delete(request);
01074 
01075    return res;
01076 }
01077 
01078 static void gtalk_free_candidates(struct gtalk_candidate *candidate)
01079 {
01080    struct gtalk_candidate *last;
01081    while (candidate) {
01082       last = candidate;
01083       candidate = candidate->next;
01084       ast_free(last);
01085    }
01086 }
01087 
01088 static void gtalk_free_pvt(struct gtalk *client, struct gtalk_pvt *p)
01089 {
01090    struct gtalk_pvt *cur, *prev = NULL;
01091    cur = client->p;
01092    while (cur) {
01093       if (cur == p) {
01094          if (prev)
01095             prev->next = p->next;
01096          else
01097             client->p = p->next;
01098          break;
01099       }
01100       prev = cur;
01101       cur = cur->next;
01102    }
01103    if (p->ringrule)
01104       iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
01105    if (p->owner)
01106       ast_log(LOG_WARNING, "Uh oh, there's an owner, this is going to be messy.\n");
01107    if (p->rtp)
01108       ast_rtp_destroy(p->rtp);
01109    if (p->vrtp)
01110       ast_rtp_destroy(p->vrtp);
01111    gtalk_free_candidates(p->theircandidates);
01112    ast_free(p);
01113 }
01114 
01115 
01116 static int gtalk_newcall(struct gtalk *client, ikspak *pak)
01117 {
01118    struct gtalk_pvt *p, *tmp = client->p;
01119    struct ast_channel *chan;
01120    int res;
01121    iks *codec;
01122    char *from = NULL;
01123    char s1[BUFSIZ], s2[BUFSIZ], s3[BUFSIZ];
01124    int peernoncodeccapability;
01125 
01126    /* Make sure our new call doesn't exist yet */
01127    from = iks_find_attrib(pak->x,"to");
01128    if(!from)
01129       from = client->connection->jid->full;
01130    
01131    while (tmp) {
01132       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
01133          ast_log(LOG_NOTICE, "Ignoring duplicate call setup on SID %s\n", tmp->sid);
01134          gtalk_response(client, from, pak, "out-of-order", NULL);
01135          return -1;
01136       }
01137       tmp = tmp->next;
01138    }
01139 
01140    if (!strcasecmp(client->name, "guest")){
01141       /* the guest account is not tied to any configured XMPP client,
01142          let's set it now */
01143       client->connection = ast_aji_get_client(from);
01144       if (!client->connection) {
01145          ast_log(LOG_ERROR, "No XMPP client to talk to, us (partial JID) : %s\n", from);
01146          return -1;
01147       }
01148    }
01149 
01150    p = gtalk_alloc(client, from, pak->from->full, iks_find_attrib(pak->query, "id"));
01151    if (!p) {
01152       ast_log(LOG_WARNING, "Unable to allocate gtalk structure!\n");
01153       return -1;
01154    }
01155 
01156    chan = gtalk_new(client, p, AST_STATE_DOWN, pak->from->user);
01157    if (!chan) {
01158       gtalk_free_pvt(client, p);
01159       return -1;
01160    }
01161 
01162    ast_mutex_lock(&p->lock);
01163    ast_copy_string(p->them, pak->from->full, sizeof(p->them));
01164    if (iks_find_attrib(pak->query, "id")) {
01165       ast_copy_string(p->sid, iks_find_attrib(pak->query, "id"),
01166             sizeof(p->sid));
01167    }
01168 
01169    /* codec points to the first <payload-type/> tag */   
01170    codec = iks_first_tag(iks_first_tag(iks_first_tag(pak->x)));
01171    
01172    while (codec) {
01173       ast_rtp_set_m_type(p->rtp, atoi(iks_find_attrib(codec, "id")));
01174       ast_rtp_set_rtpmap_type(p->rtp, atoi(iks_find_attrib(codec, "id")), "audio", iks_find_attrib(codec, "name"), 0);
01175       codec = iks_next_tag(codec);
01176    }
01177    
01178    /* Now gather all of the codecs that we are asked for */
01179    ast_rtp_get_current_formats(p->rtp, &p->peercapability, &peernoncodeccapability);
01180    p->jointcapability = p->capability & p->peercapability;
01181    ast_mutex_unlock(&p->lock);
01182       
01183    ast_setstate(chan, AST_STATE_RING);
01184    if (!p->jointcapability) {
01185       ast_log(LOG_WARNING, "Capabilities don't match : us - %s, peer - %s, combined - %s \n", ast_getformatname_multiple(s1, BUFSIZ, p->capability),
01186          ast_getformatname_multiple(s2, BUFSIZ, p->peercapability),
01187          ast_getformatname_multiple(s3, BUFSIZ, p->jointcapability));
01188       /* close session if capabilities don't match */
01189       gtalk_action(client, p, "reject");
01190       p->alreadygone = 1;
01191       gtalk_hangup(chan);
01192       ast_channel_free(chan);
01193       return -1;
01194    }  
01195 
01196    res = ast_pbx_start(chan);
01197    
01198    switch (res) {
01199    case AST_PBX_FAILED:
01200       ast_log(LOG_WARNING, "Failed to start PBX :(\n");
01201       gtalk_response(client, from, pak, "service-unavailable", NULL);
01202       break;
01203    case AST_PBX_CALL_LIMIT:
01204       ast_log(LOG_WARNING, "Failed to start PBX (call limit reached) \n");
01205       gtalk_response(client, from, pak, "service-unavailable", NULL);
01206       break;
01207    case AST_PBX_SUCCESS:
01208       gtalk_response(client, from, pak, NULL, NULL);
01209       gtalk_invite_response(p, p->them, p->us,p->sid, 0);
01210       gtalk_create_candidates(client, p, p->sid, p->them, p->us);
01211       /* nothing to do */
01212       break;
01213    }
01214 
01215    return 1;
01216 }
01217 
01218 static int gtalk_update_stun(struct gtalk *client, struct gtalk_pvt *p)
01219 {
01220    struct gtalk_candidate *tmp;
01221    struct hostent *hp;
01222    struct ast_hostent ahp;
01223    struct sockaddr_in sin;
01224    struct sockaddr_in aux;
01225 
01226    if (time(NULL) == p->laststun)
01227       return 0;
01228 
01229    tmp = p->theircandidates;
01230    p->laststun = time(NULL);
01231    while (tmp) {
01232       char username[256];
01233 
01234       /* Find the IP address of the host */
01235       hp = ast_gethostbyname(tmp->ip, &ahp);
01236       sin.sin_family = AF_INET;
01237       memcpy(&sin.sin_addr, hp->h_addr, sizeof(sin.sin_addr));
01238       sin.sin_port = htons(tmp->port);
01239       snprintf(username, sizeof(username), "%s%s", tmp->username,
01240           p->ourcandidates->username);
01241       
01242       /* Find out the result of the STUN */
01243       ast_rtp_get_peer(p->rtp, &aux);
01244 
01245       /* If the STUN result is different from the IP of the hostname,
01246          lock on the stun IP of the hostname advertised by the
01247          remote client */
01248       if (aux.sin_addr.s_addr && 
01249           aux.sin_addr.s_addr != sin.sin_addr.s_addr)
01250          ast_rtp_stun_request(p->rtp, &aux, username);
01251       else 
01252          ast_rtp_stun_request(p->rtp, &sin, username);
01253       
01254       if (aux.sin_addr.s_addr) {
01255          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);
01256          ast_debug(4, "Sending STUN request to %s\n", tmp->ip);
01257       }
01258 
01259       tmp = tmp->next;
01260    }
01261    return 1;
01262 }
01263 
01264 static int gtalk_add_candidate(struct gtalk *client, ikspak *pak)
01265 {
01266    struct gtalk_pvt *p = NULL, *tmp = NULL;
01267    struct aji_client *c = client->connection;
01268    struct gtalk_candidate *newcandidate = NULL;
01269    iks *traversenodes = NULL, *receipt = NULL;
01270    char *from;
01271 
01272    from = iks_find_attrib(pak->x,"to");
01273    if(!from)
01274       from = c->jid->full;
01275 
01276    for (tmp = client->p; tmp; tmp = tmp->next) {
01277       if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
01278          p = tmp;
01279          break;
01280       }
01281    }
01282 
01283    if (!p)
01284       return -1;
01285 
01286    traversenodes = pak->query;
01287    while(traversenodes) {
01288       if(!strcasecmp(iks_name(traversenodes), "session")) {
01289          traversenodes = iks_first_tag(traversenodes);
01290          continue;
01291       }
01292       if(!strcasecmp(iks_name(traversenodes), "transport")) {
01293          traversenodes = iks_first_tag(traversenodes);
01294          continue;
01295       }
01296       if(!strcasecmp(iks_name(traversenodes), "candidate")) {
01297          newcandidate = ast_calloc(1, sizeof(*newcandidate));
01298          if (!newcandidate)
01299             return 0;
01300          ast_copy_string(newcandidate->name, iks_find_attrib(traversenodes, "name"),
01301                      sizeof(newcandidate->name));
01302          ast_copy_string(newcandidate->ip, iks_find_attrib(traversenodes, "address"),
01303                      sizeof(newcandidate->ip));
01304          newcandidate->port = atoi(iks_find_attrib(traversenodes, "port"));
01305          ast_copy_string(newcandidate->username, iks_find_attrib(traversenodes, "username"),
01306                      sizeof(newcandidate->username));
01307          ast_copy_string(newcandidate->password, iks_find_attrib(traversenodes, "password"),
01308                      sizeof(newcandidate->password));
01309          newcandidate->preference = atof(iks_find_attrib(traversenodes, "preference"));
01310          if (!strcasecmp(iks_find_attrib(traversenodes, "protocol"), "udp"))
01311             newcandidate->protocol = AJI_PROTOCOL_UDP;
01312          if (!strcasecmp(iks_find_attrib(traversenodes, "protocol"), "ssltcp"))
01313             newcandidate->protocol = AJI_PROTOCOL_SSLTCP;
01314       
01315          if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "stun"))
01316             newcandidate->type = AJI_CONNECT_STUN;
01317          if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "local"))
01318             newcandidate->type = AJI_CONNECT_LOCAL;
01319          if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "relay"))
01320             newcandidate->type = AJI_CONNECT_RELAY;
01321          ast_copy_string(newcandidate->network, iks_find_attrib(traversenodes, "network"),
01322                      sizeof(newcandidate->network));
01323          newcandidate->generation = atoi(iks_find_attrib(traversenodes, "generation"));
01324          newcandidate->next = NULL;
01325       
01326          newcandidate->next = p->theircandidates;
01327          p->theircandidates = newcandidate;
01328          p->laststun = 0;
01329          gtalk_update_stun(p->parent, p);
01330          newcandidate = NULL;
01331       }
01332       traversenodes = iks_next_tag(traversenodes);
01333    }
01334    
01335    receipt = iks_new("iq");
01336    iks_insert_attrib(receipt, "type", "result");
01337    iks_insert_attrib(receipt, "from", from);
01338    iks_insert_attrib(receipt, "to", iks_find_attrib(pak->x, "from"));
01339    iks_insert_attrib(receipt, "id", iks_find_attrib(pak->x, "id"));
01340    ast_aji_send(c, receipt);
01341 
01342    iks_delete(receipt);
01343 
01344    return 1;
01345 }
01346 
01347 static struct ast_frame *gtalk_rtp_read(struct ast_channel *ast, struct gtalk_pvt *p)
01348 {
01349    struct ast_frame *f;
01350 
01351    if (!p->rtp)
01352       return &ast_null_frame;
01353    f = ast_rtp_read(p->rtp);
01354    gtalk_update_stun(p->parent, p);
01355    if (p->owner) {
01356       /* We already hold the channel lock */
01357       if (f->frametype == AST_FRAME_VOICE) {
01358          if (f->subclass != (p->owner->nativeformats & AST_FORMAT_AUDIO_MASK)) {
01359             ast_debug(1, "Oooh, format changed to %d\n", f->subclass);
01360             p->owner->nativeformats =
01361                (p->owner->nativeformats & AST_FORMAT_VIDEO_MASK) | f->subclass;
01362             ast_set_read_format(p->owner, p->owner->readformat);
01363             ast_set_write_format(p->owner, p->owner->writeformat);
01364          }
01365 /*       if ((ast_test_flag(p, SIP_DTMF) == SIP_DTMF_INBAND) && p->vad) {
01366             f = ast_dsp_process(p->owner, p->vad, f);
01367             if (option_debug && f && (f->frametype == AST_FRAME_DTMF))
01368                ast_debug(1, "* Detected inband DTMF '%c'\n", f->subclass);
01369               } */
01370       }
01371    }
01372    return f;
01373 }
01374 
01375 static struct ast_frame *gtalk_read(struct ast_channel *ast)
01376 {
01377    struct ast_frame *fr;
01378    struct gtalk_pvt *p = ast->tech_pvt;
01379 
01380    ast_mutex_lock(&p->lock);
01381    fr = gtalk_rtp_read(ast, p);
01382    ast_mutex_unlock(&p->lock);
01383    return fr;
01384 }
01385 
01386 /*! \brief Send frame to media channel (rtp) */
01387 static int gtalk_write(struct ast_channel *ast, struct ast_frame *frame)
01388 {
01389    struct gtalk_pvt *p = ast->tech_pvt;
01390    int res = 0;
01391 
01392    switch (frame->frametype) {
01393    case AST_FRAME_VOICE:
01394       if (!(frame->subclass & ast->nativeformats)) {
01395          ast_log(LOG_WARNING,
01396                "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n",
01397                frame->subclass, ast->nativeformats, ast->readformat,
01398                ast->writeformat);
01399          return 0;
01400       }
01401       if (p) {
01402          ast_mutex_lock(&p->lock);
01403          if (p->rtp) {
01404             res = ast_rtp_write(p->rtp, frame);
01405          }
01406          ast_mutex_unlock(&p->lock);
01407       }
01408       break;
01409    case AST_FRAME_VIDEO:
01410       if (p) {
01411          ast_mutex_lock(&p->lock);
01412          if (p->vrtp) {
01413             res = ast_rtp_write(p->vrtp, frame);
01414          }
01415          ast_mutex_unlock(&p->lock);
01416       }
01417       break;
01418    case AST_FRAME_IMAGE:
01419       return 0;
01420       break;
01421    default:
01422       ast_log(LOG_WARNING, "Can't send %d type frames with Gtalk write\n",
01423             frame->frametype);
01424       return 0;
01425    }
01426 
01427    return res;
01428 }
01429 
01430 static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
01431 {
01432    struct gtalk_pvt *p = newchan->tech_pvt;
01433    ast_mutex_lock(&p->lock);
01434 
01435    if ((p->owner != oldchan)) {
01436       ast_mutex_unlock(&p->lock);
01437       return -1;
01438    }
01439    if (p->owner == oldchan)
01440       p->owner = newchan;
01441    ast_mutex_unlock(&p->lock);
01442    return 0;
01443 }
01444 
01445 static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen)
01446 {
01447    int res = 0;
01448 
01449    switch (condition) {
01450    case AST_CONTROL_HOLD:
01451       ast_moh_start(ast, data, NULL);
01452       break;
01453    case AST_CONTROL_UNHOLD:
01454       ast_moh_stop(ast);
01455       break;
01456    default:
01457       ast_log(LOG_NOTICE, "Don't know how to indicate condition '%d'\n", condition);
01458       res = -1;
01459    }
01460 
01461    return res;
01462 }
01463 
01464 static int gtalk_digit_begin(struct ast_channel *chan, char digit)
01465 {
01466    return gtalk_digit(chan, digit, 0);
01467 }
01468 
01469 static int gtalk_digit_end(struct ast_channel *chan, char digit, unsigned int duration)
01470 {
01471    return gtalk_digit(chan, digit, duration);
01472 }
01473 
01474 static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration)
01475 {
01476    struct gtalk_pvt *p = ast->tech_pvt;
01477    struct gtalk *client = p->parent;
01478    iks *iq, *gtalk, *dtmf;
01479    char buffer[2] = {digit, '\0'};
01480    iq = iks_new("iq");
01481    gtalk = iks_new("gtalk");
01482    dtmf = iks_new("dtmf");
01483    if(!iq || !gtalk || !dtmf) {
01484       iks_delete(iq);
01485       iks_delete(gtalk);
01486       iks_delete(dtmf);
01487       ast_log(LOG_ERROR, "Did not send dtmf do to memory issue\n");
01488       return -1;
01489    }
01490 
01491    iks_insert_attrib(iq, "type", "set");
01492    iks_insert_attrib(iq, "to", p->them);
01493    iks_insert_attrib(iq, "from", p->us);
01494    iks_insert_attrib(iq, "id", client->connection->mid);
01495    ast_aji_increment_mid(client->connection->mid);
01496    iks_insert_attrib(gtalk, "xmlns", "http://jabber.org/protocol/gtalk");
01497    iks_insert_attrib(gtalk, "action", "session-info");
01498    iks_insert_attrib(gtalk, "initiator", p->initiator ? p->us: p->them);
01499    iks_insert_attrib(gtalk, "sid", p->sid);
01500    iks_insert_attrib(dtmf, "xmlns", "http://jabber.org/protocol/gtalk/info/dtmf");
01501    iks_insert_attrib(dtmf, "code", buffer);
01502    iks_insert_node(iq, gtalk);
01503    iks_insert_node(gtalk, dtmf);
01504 
01505    ast_mutex_lock(&p->lock);
01506    if (ast->dtmff.frametype == AST_FRAME_DTMF_BEGIN || duration == 0) {
01507       iks_insert_attrib(dtmf, "action", "button-down");
01508    } else if (ast->dtmff.frametype == AST_FRAME_DTMF_END || duration != 0) {
01509       iks_insert_attrib(dtmf, "action", "button-up");
01510    }
01511    ast_aji_send(client->connection, iq);
01512 
01513    iks_delete(iq);
01514    iks_delete(gtalk);
01515    iks_delete(dtmf);
01516    ast_mutex_unlock(&p->lock);
01517    return 0;
01518 }
01519 
01520 static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen)
01521 {
01522    ast_log(LOG_NOTICE, "XXX Implement gtalk sendhtml XXX\n");
01523 
01524    return -1;
01525 }
01526 
01527 /* Not in use right now.
01528 static int gtalk_auto_congest(void *nothing)
01529 {
01530    struct gtalk_pvt *p = nothing;
01531 
01532    ast_mutex_lock(&p->lock);
01533    if (p->owner) {
01534       if (!ast_channel_trylock(p->owner)) {
01535          ast_log(LOG_NOTICE, "Auto-congesting %s\n", p->owner->name);
01536          ast_queue_control(p->owner, AST_CONTROL_CONGESTION);
01537          ast_channel_unlock(p->owner);
01538       }
01539    }
01540    ast_mutex_unlock(&p->lock);
01541    return 0;
01542 }
01543 */
01544 
01545 /*! \brief Initiate new call, part of PBX interface 
01546  *    dest is the dial string */
01547 static int gtalk_call(struct ast_channel *ast, char *dest, int timeout)
01548 {
01549    struct gtalk_pvt *p = ast->tech_pvt;
01550 
01551    if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
01552       ast_log(LOG_WARNING, "gtalk_call called on %s, neither down nor reserved\n", ast->name);
01553       return -1;
01554    }
01555 
01556    ast_setstate(ast, AST_STATE_RING);
01557    if (!p->ringrule) {
01558       ast_copy_string(p->ring, p->parent->connection->mid, sizeof(p->ring));
01559       p->ringrule = iks_filter_add_rule(p->parent->connection->f, gtalk_ringing_ack, p,
01560                      IKS_RULE_ID, p->ring, IKS_RULE_DONE);
01561    } else
01562       ast_log(LOG_WARNING, "Whoa, already have a ring rule!\n");
01563 
01564    gtalk_invite(p, p->them, p->us, p->sid, 1);
01565    gtalk_create_candidates(p->parent, p, p->sid, p->them, p->us);
01566 
01567    return 0;
01568 }
01569 
01570 /*! \brief Hangup a call through the gtalk proxy channel */
01571 static int gtalk_hangup(struct ast_channel *ast)
01572 {
01573    struct gtalk_pvt *p = ast->tech_pvt;
01574    struct gtalk *client;
01575 
01576    ast_mutex_lock(&p->lock);
01577    client = p->parent;
01578    p->owner = NULL;
01579    ast->tech_pvt = NULL;
01580    if (!p->alreadygone)
01581       gtalk_action(client, p, "terminate");
01582    ast_mutex_unlock(&p->lock);
01583 
01584    gtalk_free_pvt(client, p);
01585    ast_module_unref(ast_module_info->self);
01586 
01587    return 0;
01588 }
01589 
01590 /*! \brief Part of PBX interface */
01591 static struct ast_channel *gtalk_request(const char *type, int format, void *data, int *cause)
01592 {
01593    struct gtalk_pvt *p = NULL;
01594    struct gtalk *client = NULL;
01595    char *sender = NULL, *to = NULL, *s = NULL;
01596    struct ast_channel *chan = NULL;
01597 
01598    if (data) {
01599       s = ast_strdupa(data);
01600       if (s) {
01601          sender = strsep(&s, "/");
01602          if (sender && (sender[0] != '\0'))
01603             to = strsep(&s, "/");
01604          if (!to) {
01605             ast_log(LOG_ERROR, "Bad arguments in Gtalk Dialstring: %s\n", (char*) data);
01606             return NULL;
01607          }
01608       }
01609    }
01610 
01611    client = find_gtalk(to, sender);
01612    if (!client) {
01613       ast_log(LOG_WARNING, "Could not find recipient.\n");
01614       return NULL;
01615    }
01616    if (!strcasecmp(client->name, "guest")){
01617       /* the guest account is not tied to any configured XMPP client,
01618          let's set it now */
01619       client->connection = ast_aji_get_client(sender);
01620       if (!client->connection) {
01621          ast_log(LOG_ERROR, "No XMPP client to talk to, us (partial JID) : %s\n", sender);
01622          return NULL;
01623       }
01624    }
01625        
01626    ASTOBJ_WRLOCK(client);
01627    p = gtalk_alloc(client, strchr(sender, '@') ? sender : client->connection->jid->full, strchr(to, '@') ? to : client->user, NULL);
01628    if (p)
01629       chan = gtalk_new(client, p, AST_STATE_DOWN, to);
01630 
01631    ASTOBJ_UNLOCK(client);
01632    return chan;
01633 }
01634 
01635 /*! \brief CLI command "gtalk show channels" */
01636 static char *gtalk_show_channels(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
01637 {
01638 #define FORMAT  "%-30.30s  %-30.30s  %-15.15s  %-5.5s %-5.5s \n"
01639    struct gtalk_pvt *p;
01640    struct ast_channel *chan;
01641    int numchans = 0;
01642    char them[AJI_MAX_JIDLEN];
01643    char *jid = NULL;
01644    char *resource = NULL;
01645 
01646    switch (cmd) {
01647    case CLI_INIT:
01648       e->command = "gtalk show channels";
01649       e->usage =
01650          "Usage: gtalk show channels\n"
01651          "       Shows current state of the Gtalk channels.\n";
01652       return NULL;
01653    case CLI_GENERATE:
01654       return NULL;
01655    }
01656 
01657    if (a->argc != 3)
01658       return CLI_SHOWUSAGE;
01659 
01660    ast_mutex_lock(&gtalklock);
01661    ast_cli(a->fd, FORMAT, "Channel", "Jabber ID", "Resource", "Read", "Write");
01662    ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
01663       ASTOBJ_WRLOCK(iterator);
01664       p = iterator->p;
01665       while(p) {
01666          chan = p->owner;
01667          ast_copy_string(them, p->them, sizeof(them));
01668          jid = them;
01669          resource = strchr(them, '/');
01670          if (!resource)
01671             resource = "None";
01672          else {
01673             *resource = '\0';
01674             resource ++;
01675          }
01676          if (chan)
01677             ast_cli(a->fd, FORMAT, 
01678                chan->name,
01679                jid,
01680                resource,
01681                ast_getformatname(chan->readformat),
01682                ast_getformatname(chan->writeformat)               
01683                );
01684          else 
01685             ast_log(LOG_WARNING, "No available channel\n");
01686          numchans ++;
01687          p = p->next;
01688       }
01689       ASTOBJ_UNLOCK(iterator);
01690    });
01691 
01692    ast_mutex_unlock(&gtalklock);
01693 
01694    ast_cli(a->fd, "%d active gtalk channel%s\n", numchans, (numchans != 1) ? "s" : "");
01695    return CLI_SUCCESS;
01696 #undef FORMAT
01697 }
01698 
01699 /*! \brief CLI command "gtalk reload" */
01700 static char *gtalk_do_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
01701 {
01702    switch (cmd) {
01703    case CLI_INIT:
01704       e->command = "gtalk reload";
01705       e->usage =
01706          "Usage: gtalk reload\n"
01707          "       Reload gtalk channel driver.\n";
01708       return NULL;
01709    case CLI_GENERATE:
01710       return NULL;
01711    }  
01712    
01713    ast_verbose("IT DOES WORK!\n");
01714    return CLI_SUCCESS;
01715 }
01716 
01717 static int gtalk_parser(void *data, ikspak *pak)
01718 {
01719    struct gtalk *client = ASTOBJ_REF((struct gtalk *) data);
01720 
01721    if (iks_find_attrib(pak->x, "type") && !strcmp(iks_find_attrib (pak->x, "type"),"error")) {
01722       ast_log(LOG_NOTICE, "Remote peer reported an error, trying to establish the call anyway\n");
01723    }
01724    else if (iks_find_with_attrib(pak->x, "session", "type", "initiate")) {
01725       /* New call */
01726       gtalk_newcall(client, pak);
01727    } else if (iks_find_with_attrib(pak->x, "session", "type", "candidates") || iks_find_with_attrib(pak->x, "session", "type", "transport-info")) {
01728       ast_debug(3, "About to add candidate!\n");
01729       gtalk_add_candidate(client, pak);
01730       ast_debug(3, "Candidate Added!\n");
01731    } else if (iks_find_with_attrib(pak->x, "session", "type", "accept")) {
01732       gtalk_is_answered(client, pak);
01733    } else if (iks_find_with_attrib(pak->x, "session", "type", "transport-accept")) {
01734       gtalk_is_accepted(client, pak);
01735    } else if (iks_find_with_attrib(pak->x, "session", "type", "content-info") || iks_find_with_attrib(pak->x, "gtalk", "action", "session-info")) {
01736       gtalk_handle_dtmf(client, pak);
01737    } else if (iks_find_with_attrib(pak->x, "session", "type", "terminate")) {
01738       gtalk_hangup_farend(client, pak);
01739    } else if (iks_find_with_attrib(pak->x, "session", "type", "reject")) {
01740       gtalk_hangup_farend(client, pak);
01741    }
01742    ASTOBJ_UNREF(client, gtalk_member_destroy);
01743    return IKS_FILTER_EAT;
01744 }
01745 
01746 /* Not using this anymore probably take out soon 
01747 static struct gtalk_candidate *gtalk_create_candidate(char *args)
01748 {
01749    char *name, *type, *preference, *protocol;
01750    struct gtalk_candidate *res;
01751    res = ast_calloc(1, sizeof(*res));
01752    if (args)
01753       name = args;
01754    if ((args = strchr(args, ','))) {
01755       *args = '\0';
01756       args++;
01757       preference = args;
01758    }
01759    if ((args = strchr(args, ','))) {
01760       *args = '\0';
01761       args++;
01762       protocol = args;
01763    }
01764    if ((args = strchr(args, ','))) {
01765       *args = '\0';
01766       args++;
01767       type = args;
01768    }
01769    if (name)
01770       ast_copy_string(res->name, name, sizeof(res->name));
01771    if (preference) {
01772       res->preference = atof(preference);
01773    }
01774    if (protocol) {
01775       if (!strcasecmp("udp", protocol))
01776          res->protocol = AJI_PROTOCOL_UDP;
01777       if (!strcasecmp("ssltcp", protocol))
01778          res->protocol = AJI_PROTOCOL_SSLTCP;
01779    }
01780    if (type) {
01781       if (!strcasecmp("stun", type))
01782          res->type = AJI_CONNECT_STUN;
01783       if (!strcasecmp("local", type))
01784          res->type = AJI_CONNECT_LOCAL;
01785       if (!strcasecmp("relay", type))
01786          res->type = AJI_CONNECT_RELAY;
01787    }
01788 
01789    return res;
01790 }
01791 */
01792 
01793 static int gtalk_create_member(char *label, struct ast_variable *var, int allowguest,
01794                         struct ast_codec_pref prefs, char *context,
01795                         struct gtalk *member)
01796 {
01797    struct aji_client *client;
01798 
01799    if (!member)
01800       ast_log(LOG_WARNING, "Out of memory.\n");
01801 
01802    ast_copy_string(member->name, label, sizeof(member->name));
01803    ast_copy_string(member->user, label, sizeof(member->user));
01804    ast_copy_string(member->context, context, sizeof(member->context));
01805    member->allowguest = allowguest;
01806    member->prefs = prefs;
01807    while (var) {
01808 #if 0
01809       struct gtalk_candidate *candidate = NULL;
01810 #endif
01811       if (!strcasecmp(var->name, "username"))
01812          ast_copy_string(member->user, var->value, sizeof(member->user));
01813       else if (!strcasecmp(var->name, "disallow"))
01814          ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 0);
01815       else if (!strcasecmp(var->name, "allow"))
01816          ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 1);
01817       else if (!strcasecmp(var->name, "context"))
01818          ast_copy_string(member->context, var->value, sizeof(member->context));
01819       else if (!strcasecmp(var->name, "parkinglot"))
01820          ast_copy_string(member->parkinglot, var->value, sizeof(member->parkinglot));
01821 #if 0
01822       else if (!strcasecmp(var->name, "candidate")) {
01823          candidate = gtalk_create_candidate(var->value);
01824          if (candidate) {
01825             candidate->next = member->ourcandidates;
01826             member->ourcandidates = candidate;
01827          }
01828       }
01829 #endif
01830       else if (!strcasecmp(var->name, "connection")) {
01831          if ((client = ast_aji_get_client(var->value))) {
01832             member->connection = client;
01833             iks_filter_add_rule(client->f, gtalk_parser, member, 
01834                       IKS_RULE_TYPE, IKS_PAK_IQ, 
01835                       IKS_RULE_FROM_PARTIAL, member->user,
01836                       IKS_RULE_NS, "http://www.google.com/session",
01837                       IKS_RULE_DONE);
01838 
01839          } else {
01840             ast_log(LOG_ERROR, "connection referenced not found!\n");
01841             return 0;
01842          }
01843       }
01844       var = var->next;
01845    }
01846    if (member->connection && member->user)
01847       member->buddy = ASTOBJ_CONTAINER_FIND(&member->connection->buddies, member->user);
01848    else {
01849       ast_log(LOG_ERROR, "No Connection or Username!\n");
01850    }
01851    return 1;
01852 }
01853 
01854 static int gtalk_load_config(void)
01855 {
01856    char *cat = NULL;
01857    struct ast_config *cfg = NULL;
01858    char context[AST_MAX_CONTEXT];
01859    char parkinglot[AST_MAX_CONTEXT];
01860    int allowguest = 1;
01861    struct ast_variable *var;
01862    struct gtalk *member;
01863    struct ast_codec_pref prefs;
01864    struct aji_client_container *clients;
01865    struct gtalk_candidate *global_candidates = NULL;
01866    struct hostent *hp;
01867    struct ast_hostent ahp;
01868    struct ast_flags config_flags = { 0 };
01869 
01870    cfg = ast_config_load(GOOGLE_CONFIG, config_flags);
01871    if (!cfg)
01872       return 0;
01873 
01874    /* Copy the default jb config over global_jbconf */
01875    memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
01876 
01877    cat = ast_category_browse(cfg, NULL);
01878    for (var = ast_variable_browse(cfg, "general"); var; var = var->next) {
01879       /* handle jb conf */
01880       if (!ast_jb_read_conf(&global_jbconf, var->name, var->value))
01881          continue;
01882 
01883       if (!strcasecmp(var->name, "allowguest"))
01884          allowguest =
01885             (ast_true(ast_variable_retrieve(cfg, "general", "allowguest"))) ? 1 : 0;
01886       else if (!strcasecmp(var->name, "disallow"))
01887          ast_parse_allow_disallow(&prefs, &global_capability, var->value, 0);
01888       else if (!strcasecmp(var->name, "allow"))
01889          ast_parse_allow_disallow(&prefs, &global_capability, var->value, 1);
01890       else if (!strcasecmp(var->name, "context"))
01891          ast_copy_string(context, var->value, sizeof(context));
01892       else if (!strcasecmp(var->name, "parkinglot"))
01893          ast_copy_string(parkinglot, var->value, sizeof(parkinglot));
01894       else if (!strcasecmp(var->name, "bindaddr")) {
01895          if (!(hp = ast_gethostbyname(var->value, &ahp))) {
01896             ast_log(LOG_WARNING, "Invalid address: %s\n", var->value);
01897          } else {
01898             memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
01899          }
01900       }
01901 /*  Idea to allow for custom candidates  */
01902 /*
01903       else if (!strcasecmp(var->name, "candidate")) {
01904          candidate = gtalk_create_candidate(var->value);
01905          if (candidate) {
01906             candidate->next = global_candidates;
01907             global_candidates = candidate;
01908          }
01909       }
01910 */
01911    }
01912    while (cat) {
01913       if (strcasecmp(cat, "general")) {
01914          var = ast_variable_browse(cfg, cat);
01915          member = ast_calloc(1, sizeof(*member));
01916          ASTOBJ_INIT(member);
01917          ASTOBJ_WRLOCK(member);
01918          if (!strcasecmp(cat, "guest")) {
01919             ast_copy_string(member->name, "guest", sizeof(member->name));
01920             ast_copy_string(member->user, "guest", sizeof(member->user));
01921             ast_copy_string(member->context, context, sizeof(member->context));
01922             ast_copy_string(member->parkinglot, parkinglot, sizeof(member->parkinglot));
01923             member->allowguest = allowguest;
01924             member->prefs = prefs;
01925             while (var) {
01926                if (!strcasecmp(var->name, "disallow"))
01927                   ast_parse_allow_disallow(&member->prefs, &member->capability,
01928                                      var->value, 0);
01929                else if (!strcasecmp(var->name, "allow"))
01930                   ast_parse_allow_disallow(&member->prefs, &member->capability,
01931                                      var->value, 1);
01932                else if (!strcasecmp(var->name, "context"))
01933                   ast_copy_string(member->context, var->value,
01934                               sizeof(member->context));
01935                else if (!strcasecmp(var->name, "parkinglot"))
01936                   ast_copy_string(member->parkinglot, var->value,
01937                               sizeof(member->parkinglot));
01938 /*  Idea to allow for custom candidates  */
01939 /*
01940                else if (!strcasecmp(var->name, "candidate")) {
01941                   candidate = gtalk_create_candidate(var->value);
01942                   if (candidate) {
01943                      candidate->next = member->ourcandidates;
01944                      member->ourcandidates = candidate;
01945                   }
01946                }
01947 */
01948                var = var->next;
01949             }
01950             ASTOBJ_UNLOCK(member);
01951             clients = ast_aji_get_clients();
01952             if (clients) {
01953                ASTOBJ_CONTAINER_TRAVERSE(clients, 1, {
01954                   ASTOBJ_WRLOCK(iterator);
01955                   ASTOBJ_WRLOCK(member);
01956                   member->connection = NULL;
01957                   iks_filter_add_rule(iterator->f, gtalk_parser, member, IKS_RULE_TYPE, IKS_PAK_IQ, IKS_RULE_NS, "http://www.google.com/session", IKS_RULE_DONE);
01958                   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);
01959                   ASTOBJ_UNLOCK(member);
01960                   ASTOBJ_UNLOCK(iterator);
01961                });
01962                ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
01963             } else {
01964                ASTOBJ_UNLOCK(member);
01965                ASTOBJ_UNREF(member, gtalk_member_destroy);
01966             }
01967          } else {
01968             ASTOBJ_UNLOCK(member);
01969             if (gtalk_create_member(cat, var, allowguest, prefs, context, member))
01970                ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
01971             ASTOBJ_UNREF(member, gtalk_member_destroy);
01972          }
01973       }
01974       cat = ast_category_browse(cfg, cat);
01975    }
01976    gtalk_free_candidates(global_candidates);
01977    return 1;
01978 }
01979 
01980 /*! \brief Load module into PBX, register channel */
01981 static int load_module(void)
01982 {
01983    char *jabber_loaded = ast_module_helper("", "res_jabber.so", 0, 0, 0, 0);
01984    free(jabber_loaded);
01985    if (!jabber_loaded) {
01986       /* If embedded, check for a different module name */
01987       jabber_loaded = ast_module_helper("", "res_jabber", 0, 0, 0, 0);
01988       free(jabber_loaded);
01989       if (!jabber_loaded) {
01990          ast_log(LOG_ERROR, "chan_gtalk.so depends upon res_jabber.so\n");
01991          return AST_MODULE_LOAD_DECLINE;
01992       }
01993    }
01994 
01995    ASTOBJ_CONTAINER_INIT(&gtalk_list);
01996    if (!gtalk_load_config()) {
01997       ast_log(LOG_ERROR, "Unable to read config file %s. Not loading module.\n", GOOGLE_CONFIG);
01998       return 0;
01999    }
02000 
02001    sched = sched_context_create();
02002    if (!sched) 
02003       ast_log(LOG_WARNING, "Unable to create schedule context\n");
02004 
02005    io = io_context_create();
02006    if (!io) 
02007       ast_log(LOG_WARNING, "Unable to create I/O context\n");
02008 
02009    if (ast_find_ourip(&__ourip, bindaddr)) {
02010       ast_log(LOG_WARNING, "Unable to get own IP address, Gtalk disabled\n");
02011       return 0;
02012    }
02013 
02014    ast_rtp_proto_register(&gtalk_rtp);
02015    ast_cli_register_multiple(gtalk_cli, ARRAY_LEN(gtalk_cli));
02016 
02017    /* Make sure we can register our channel type */
02018    if (ast_channel_register(&gtalk_tech)) {
02019       ast_log(LOG_ERROR, "Unable to register channel class %s\n", gtalk_tech.type);
02020       return -1;
02021    }
02022    return 0;
02023 }
02024 
02025 /*! \brief Reload module */
02026 static int reload(void)
02027 {
02028    return 0;
02029 }
02030 
02031 /*! \brief Unload the gtalk channel from Asterisk */
02032 static int unload_module(void)
02033 {
02034    struct gtalk_pvt *privates = NULL;
02035    ast_cli_unregister_multiple(gtalk_cli, ARRAY_LEN(gtalk_cli));
02036    /* First, take us out of the channel loop */
02037    ast_channel_unregister(&gtalk_tech);
02038    ast_rtp_proto_unregister(&gtalk_rtp);
02039 
02040    if (!ast_mutex_lock(&gtalklock)) {
02041       /* Hangup all interfaces if they have an owner */
02042       ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
02043          ASTOBJ_WRLOCK(iterator);
02044          privates = iterator->p;
02045          while(privates) {
02046             if (privates->owner)
02047                ast_softhangup(privates->owner, AST_SOFTHANGUP_APPUNLOAD);
02048             privates = privates->next;
02049          }
02050          iterator->p = NULL;
02051          ASTOBJ_UNLOCK(iterator);
02052       });
02053       ast_mutex_unlock(&gtalklock);
02054    } else {
02055       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
02056       return -1;
02057    }
02058    ASTOBJ_CONTAINER_DESTROYALL(&gtalk_list, gtalk_member_destroy);
02059    ASTOBJ_CONTAINER_DESTROY(&gtalk_list);
02060    return 0;
02061 }
02062 
02063 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Gtalk Channel Driver",
02064       .load = load_module,
02065       .unload = unload_module,
02066       .reload = reload,
02067           );

Generated on Fri Jul 24 00:40:47 2009 for Asterisk - the Open Source PBX by  doxygen 1.4.7