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asterisk/channels/chan_gtalk.c

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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2005, Digium, Inc.
*
* Matt O'Gorman <mogorman@digium.com>
* Philippe Sultan <philippe.sultan@gmail.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \author Matt O'Gorman <mogorman@digium.com>
* \author Philippe Sultan <philippe.sultan@gmail.com>
*
* \brief Gtalk Channel Driver, until google/libjingle works with jingle spec
*
* \ingroup channel_drivers
*
* ********** General TODO:s
* \todo Support config reloading.
* \todo Fix native bridging.
*/
/*** MODULEINFO
<depend>iksemel</depend>
<depend>res_jabber</depend>
<use>openssl</use>
***/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include <sys/socket.h>
#include <fcntl.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/signal.h>
#include <iksemel.h>
#include <pthread.h>
#include <ctype.h>
#include "asterisk/lock.h"
#include "asterisk/channel.h"
#include "asterisk/config.h"
#include "asterisk/module.h"
#include "asterisk/pbx.h"
#include "asterisk/sched.h"
#include "asterisk/io.h"
#include "asterisk/rtp_engine.h"
#include "asterisk/stun.h"
#include "asterisk/acl.h"
#include "asterisk/callerid.h"
#include "asterisk/file.h"
#include "asterisk/cli.h"
#include "asterisk/app.h"
#include "asterisk/musiconhold.h"
#include "asterisk/manager.h"
#include "asterisk/stringfields.h"
#include "asterisk/utils.h"
#include "asterisk/causes.h"
#include "asterisk/astobj.h"
#include "asterisk/abstract_jb.h"
#include "asterisk/jabber.h"
#include "asterisk/jingle.h"
#include "asterisk/features.h"
#define GOOGLE_CONFIG "gtalk.conf"
/*! Global jitterbuffer configuration - by default, jb is disabled */
static struct ast_jb_conf default_jbconf =
{
.flags = 0,
.max_size = -1,
.resync_threshold = -1,
.impl = "",
.target_extra = -1,
};
static struct ast_jb_conf global_jbconf;
enum gtalk_protocol {
AJI_PROTOCOL_UDP = 1,
AJI_PROTOCOL_SSLTCP = 2,
};
enum gtalk_connect_type {
AJI_CONNECT_STUN = 1,
AJI_CONNECT_LOCAL = 2,
AJI_CONNECT_RELAY = 3,
};
struct gtalk_pvt {
ast_mutex_t lock; /*!< Channel private lock */
time_t laststun;
struct gtalk *parent; /*!< Parent client */
char sid[100];
char us[AJI_MAX_JIDLEN];
char them[AJI_MAX_JIDLEN];
char ring[10]; /*!< Message ID of ring */
iksrule *ringrule; /*!< Rule for matching RING request */
int initiator; /*!< If we're the initiator */
int alreadygone;
int capability;
struct ast_codec_pref prefs;
struct gtalk_candidate *theircandidates;
struct gtalk_candidate *ourcandidates;
char cid_num[80]; /*!< Caller ID num */
char cid_name[80]; /*!< Caller ID name */
char exten[80]; /*!< Called extension */
struct ast_channel *owner; /*!< Master Channel */
struct ast_rtp_instance *rtp; /*!< RTP audio session */
struct ast_rtp_instance *vrtp; /*!< RTP video session */
format_t jointcapability; /*!< Supported capability at both ends (codecs ) */
format_t peercapability;
struct gtalk_pvt *next; /* Next entity */
};
struct gtalk_candidate {
char name[100];
enum gtalk_protocol protocol;
double preference;
char username[100];
char password[100];
enum gtalk_connect_type type;
char network[6];
int generation;
char ip[16];
int port;
int receipt;
struct gtalk_candidate *next;
};
struct gtalk {
ASTOBJ_COMPONENTS(struct gtalk);
struct aji_client *connection;
struct aji_buddy *buddy;
struct gtalk_pvt *p;
struct ast_codec_pref prefs;
int amaflags; /*!< AMA Flags */
char user[AJI_MAX_JIDLEN];
char context[AST_MAX_CONTEXT];
char parkinglot[AST_MAX_CONTEXT]; /*!< Parkinglot */
char accountcode[AST_MAX_ACCOUNT_CODE]; /*!< Account code */
format_t capability;
ast_group_t callgroup; /*!< Call group */
ast_group_t pickupgroup; /*!< Pickup group */
int callingpres; /*!< Calling presentation */
int allowguest;
char language[MAX_LANGUAGE]; /*!< Default language for prompts */
char musicclass[MAX_MUSICCLASS]; /*!< Music on Hold class */
};
struct gtalk_container {
ASTOBJ_CONTAINER_COMPONENTS(struct gtalk);
};
static const char desc[] = "Gtalk Channel";
static const char DEFAULT_CONTEXT[] = "default";
static const int DEFAULT_ALLOWGUEST = 1;
static format_t global_capability = AST_FORMAT_ULAW | AST_FORMAT_ALAW | AST_FORMAT_GSM | AST_FORMAT_H263;
AST_MUTEX_DEFINE_STATIC(gtalklock); /*!< Protect the interface list (of gtalk_pvt's) */
/* Forward declarations */
static struct ast_channel *gtalk_request(const char *type, format_t format, const struct ast_channel *requestor, void *data, int *cause);
/*static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration);*/
static int gtalk_sendtext(struct ast_channel *ast, const char *text);
static int gtalk_digit_begin(struct ast_channel *ast, char digit);
static int gtalk_digit_end(struct ast_channel *ast, char digit, unsigned int duration);
static int gtalk_call(struct ast_channel *ast, char *dest, int timeout);
static int gtalk_hangup(struct ast_channel *ast);
static int gtalk_answer(struct ast_channel *ast);
static int gtalk_action(struct gtalk *client, struct gtalk_pvt *p, const char *action);
static void gtalk_free_pvt(struct gtalk *client, struct gtalk_pvt *p);
static int gtalk_newcall(struct gtalk *client, ikspak *pak);
static struct ast_frame *gtalk_read(struct ast_channel *ast);
static int gtalk_write(struct ast_channel *ast, struct ast_frame *f);
static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen);
static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen);
static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid);
static int gtalk_update_stun(struct gtalk *client, struct gtalk_pvt *p);
/* static char *gtalk_do_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a); */
static char *gtalk_show_channels(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
static char *gtalk_show_settings(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
static int gtalk_update_externip(void);
static int gtalk_parser(void *data, ikspak *pak);
static int gtalk_create_candidates(struct gtalk *client, struct gtalk_pvt *p, char *sid, char *from, char *to);
/*! \brief PBX interface structure for channel registration */
static const struct ast_channel_tech gtalk_tech = {
.type = "Gtalk",
.description = "Gtalk Channel Driver",
.capabilities = AST_FORMAT_AUDIO_MASK,
.requester = gtalk_request,
.send_text = gtalk_sendtext,
.send_digit_begin = gtalk_digit_begin,
.send_digit_end = gtalk_digit_end,
/* XXX TODO native bridging is causing odd problems with DTMF pass-through with
* the gtalk servers. Enable native bridging once the source of this problem has
* been identified.
.bridge = ast_rtp_instance_bridge, */
.call = gtalk_call,
.hangup = gtalk_hangup,
.answer = gtalk_answer,
.read = gtalk_read,
.write = gtalk_write,
.exception = gtalk_read,
.indicate = gtalk_indicate,
.fixup = gtalk_fixup,
.send_html = gtalk_sendhtml,
.properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER
};
static struct sockaddr_in bindaddr = { 0, }; /*!< The address we bind to */
static struct ast_sched_context *sched; /*!< The scheduling context */
static struct io_context *io; /*!< The IO context */
static struct in_addr __ourip;
static struct ast_cli_entry gtalk_cli[] = {
/* AST_CLI_DEFINE(gtalk_do_reload, "Reload GoogleTalk configuration"), XXX TODO reloads are not possible yet. */
AST_CLI_DEFINE(gtalk_show_channels, "Show GoogleTalk channels"),
AST_CLI_DEFINE(gtalk_show_settings, "Show GoogleTalk global settings"),
};
static char externip[16];
static char global_context[AST_MAX_CONTEXT];
static char global_parkinglot[AST_MAX_CONTEXT];
static int global_allowguest;
static struct sockaddr_in stunaddr; /*!< the stun server we get the externip from */
static int global_stunaddr;
static struct gtalk_container gtalk_list;
static void gtalk_member_destroy(struct gtalk *obj)
{
ast_free(obj);
}
static struct gtalk *find_gtalk(char *name, char *connection)
{
struct gtalk *gtalk = NULL;
char *domain = NULL , *s = NULL;
if (strchr(connection, '@')) {
s = ast_strdupa(connection);
domain = strsep(&s, "@");
ast_verbose("OOOOH domain = %s\n", domain);
}
gtalk = ASTOBJ_CONTAINER_FIND(&gtalk_list, name);
if (!gtalk && strchr(name, '@'))
gtalk = ASTOBJ_CONTAINER_FIND_FULL(&gtalk_list, name, user,,, strcasecmp);
if (!gtalk) {
/* guest call */
ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
ASTOBJ_RDLOCK(iterator);
if (!strcasecmp(iterator->name, "guest")) {
gtalk = iterator;
}
ASTOBJ_UNLOCK(iterator);
if (gtalk)
break;
});
}
return gtalk;
}
static int add_codec_to_answer(const struct gtalk_pvt *p, int codec, iks *dcodecs)
{
int res = 0;
char *format = ast_getformatname(codec);
if (!strcasecmp("ulaw", format)) {
iks *payload_eg711u, *payload_pcmu;
payload_pcmu = iks_new("payload-type");
payload_eg711u = iks_new("payload-type");
if(!payload_eg711u || !payload_pcmu) {
iks_delete(payload_pcmu);
iks_delete(payload_eg711u);
ast_log(LOG_WARNING,"Failed to allocate iks node");
return -1;
}
iks_insert_attrib(payload_pcmu, "id", "0");
iks_insert_attrib(payload_pcmu, "name", "PCMU");
iks_insert_attrib(payload_pcmu, "clockrate","8000");
iks_insert_attrib(payload_pcmu, "bitrate","64000");
iks_insert_attrib(payload_eg711u, "id", "100");
iks_insert_attrib(payload_eg711u, "name", "EG711U");
iks_insert_attrib(payload_eg711u, "clockrate","8000");
iks_insert_attrib(payload_eg711u, "bitrate","64000");
iks_insert_node(dcodecs, payload_pcmu);
iks_insert_node(dcodecs, payload_eg711u);
res ++;
}
if (!strcasecmp("alaw", format)) {
iks *payload_eg711a, *payload_pcma;
payload_pcma = iks_new("payload-type");
payload_eg711a = iks_new("payload-type");
if(!payload_eg711a || !payload_pcma) {
iks_delete(payload_eg711a);
iks_delete(payload_pcma);
ast_log(LOG_WARNING,"Failed to allocate iks node");
return -1;
}
iks_insert_attrib(payload_pcma, "id", "8");
iks_insert_attrib(payload_pcma, "name", "PCMA");
iks_insert_attrib(payload_pcma, "clockrate","8000");
iks_insert_attrib(payload_pcma, "bitrate","64000");
payload_eg711a = iks_new("payload-type");
iks_insert_attrib(payload_eg711a, "id", "101");
iks_insert_attrib(payload_eg711a, "name", "EG711A");
iks_insert_attrib(payload_eg711a, "clockrate","8000");
iks_insert_attrib(payload_eg711a, "bitrate","64000");
iks_insert_node(dcodecs, payload_pcma);
iks_insert_node(dcodecs, payload_eg711a);
res ++;
}
if (!strcasecmp("ilbc", format)) {
iks *payload_ilbc = iks_new("payload-type");
if(!payload_ilbc) {
ast_log(LOG_WARNING,"Failed to allocate iks node");
return -1;
}
iks_insert_attrib(payload_ilbc, "id", "97");
iks_insert_attrib(payload_ilbc, "name", "iLBC");
iks_insert_attrib(payload_ilbc, "clockrate","8000");
iks_insert_attrib(payload_ilbc, "bitrate","13300");
iks_insert_node(dcodecs, payload_ilbc);
res ++;
}
if (!strcasecmp("g723", format)) {
iks *payload_g723 = iks_new("payload-type");
if(!payload_g723) {
ast_log(LOG_WARNING,"Failed to allocate iks node");
return -1;
}
iks_insert_attrib(payload_g723, "id", "4");
iks_insert_attrib(payload_g723, "name", "G723");
iks_insert_attrib(payload_g723, "clockrate","8000");
iks_insert_attrib(payload_g723, "bitrate","6300");
iks_insert_node(dcodecs, payload_g723);
res ++;
}
if (!strcasecmp("speex", format)) {
iks *payload_speex = iks_new("payload-type");
if(!payload_speex) {
ast_log(LOG_WARNING,"Failed to allocate iks node");
return -1;
}
iks_insert_attrib(payload_speex, "id", "110");
iks_insert_attrib(payload_speex, "name", "speex");
iks_insert_attrib(payload_speex, "clockrate","8000");
iks_insert_attrib(payload_speex, "bitrate","11000");
iks_insert_node(dcodecs, payload_speex);
res++;
}
if (!strcasecmp("gsm", format)) {
iks *payload_gsm = iks_new("payload-type");
if(!payload_gsm) {
ast_log(LOG_WARNING,"Failed to allocate iks node");
return -1;
}
iks_insert_attrib(payload_gsm, "id", "103");
iks_insert_attrib(payload_gsm, "name", "gsm");
iks_insert_node(dcodecs, payload_gsm);
res++;
}
return res;
}
static int gtalk_invite(struct gtalk_pvt *p, char *to, char *from, char *sid, int initiator)
{
struct gtalk *client = p->parent;
iks *iq, *gtalk, *dcodecs, *payload_telephone, *transport;
int x;
int pref_codec = 0;
int alreadysent = 0;
int codecs_num = 0;
char *lowerto = NULL;
iq = iks_new("iq");
gtalk = iks_new("session");
dcodecs = iks_new("description");
transport = iks_new("transport");
payload_telephone = iks_new("payload-type");
if (!(iq && gtalk && dcodecs && transport && payload_telephone)){
iks_delete(iq);
iks_delete(gtalk);
iks_delete(dcodecs);
iks_delete(transport);
iks_delete(payload_telephone);
ast_log(LOG_ERROR, "Could not allocate iksemel nodes\n");
return 0;
}
iks_insert_attrib(dcodecs, "xmlns", GOOGLE_AUDIO_NS);
iks_insert_attrib(dcodecs, "xml:lang", "en");
for (x = 0; x < 64; x++) {
if (!(pref_codec = ast_codec_pref_index(&client->prefs, x)))
break;
if (!(client->capability & pref_codec))
continue;
if (alreadysent & pref_codec)
continue;
codecs_num = add_codec_to_answer(p, pref_codec, dcodecs);
alreadysent |= pref_codec;
}
if (codecs_num) {
/* only propose DTMF within an audio session */
iks_insert_attrib(payload_telephone, "id", "101");
iks_insert_attrib(payload_telephone, "name", "telephone-event");
iks_insert_attrib(payload_telephone, "clockrate", "8000");
}
iks_insert_attrib(transport,"xmlns",GOOGLE_TRANSPORT_NS);
iks_insert_attrib(iq, "type", "set");
iks_insert_attrib(iq, "to", to);
iks_insert_attrib(iq, "from", from);
iks_insert_attrib(iq, "id", client->connection->mid);
ast_aji_increment_mid(client->connection->mid);
iks_insert_attrib(gtalk, "xmlns", GOOGLE_NS);
iks_insert_attrib(gtalk, "type",initiator ? "initiate": "accept");
/* put the initiator attribute to lower case if we receive the call
* otherwise GoogleTalk won't establish the session */
if (!initiator) {
char c;
char *t = lowerto = ast_strdupa(to);
while (((c = *t) != '/') && (*t++ = tolower(c)));
}
iks_insert_attrib(gtalk, "initiator", initiator ? from : lowerto);
iks_insert_attrib(gtalk, "id", sid);
iks_insert_node(iq, gtalk);
iks_insert_node(gtalk, dcodecs);
iks_insert_node(dcodecs, payload_telephone);
ast_aji_send(client->connection, iq);
iks_delete(payload_telephone);
iks_delete(transport);
iks_delete(dcodecs);
iks_delete(gtalk);
iks_delete(iq);
return 1;
}
static int gtalk_ringing_ack(void *data, ikspak *pak)
{
struct gtalk_pvt *p = data;
struct ast_channel *owner;
ast_mutex_lock(&p->lock);
if (p->ringrule) {
iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
}
p->ringrule = NULL;
/* this may be a redirect */
if (!strcmp(S_OR(iks_find_attrib(pak->x, "type"), ""), "error")) {
char *name = NULL;
char *redirect = NULL;
iks *traversenodes = NULL;
traversenodes = pak->query;
while (traversenodes) {
if (!(name = iks_name(traversenodes))) {
break;
}
if (!strcasecmp(name, "error") &&
(redirect = iks_find_cdata(traversenodes, "redirect")) &&
(redirect = strstr(redirect, "xmpp:"))) {
redirect += 5;
ast_log(LOG_DEBUG, "redirect %s\n", redirect);
ast_copy_string(p->them, redirect, sizeof(p->them));
gtalk_invite(p, p->them, p->us, p->sid, 1);
break;
}
traversenodes = iks_next_tag(traversenodes);
}
}
gtalk_create_candidates(p->parent, p, p->sid, p->them, p->us);
owner = p->owner;
ast_mutex_unlock(&p->lock);
if (owner) {
ast_queue_control(owner, AST_CONTROL_RINGING);
}
return IKS_FILTER_EAT;
}
static int gtalk_answer(struct ast_channel *ast)
{
struct gtalk_pvt *p = ast->tech_pvt;
int res = 0;
ast_debug(1, "Answer!\n");
ast_mutex_lock(&p->lock);
gtalk_invite(p, p->them, p->us,p->sid, 0);
manager_event(EVENT_FLAG_SYSTEM, "ChannelUpdate", "Channel: %s\r\nChanneltype: %s\r\nGtalk-SID: %s\r\n",
ast->name, "GTALK", p->sid);
ast_mutex_unlock(&p->lock);
return res;
}
static enum ast_rtp_glue_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp_instance **instance)
{
struct gtalk_pvt *p = chan->tech_pvt;
enum ast_rtp_glue_result res = AST_RTP_GLUE_RESULT_FORBID;
if (!p)
return res;
ast_mutex_lock(&p->lock);
if (p->rtp){
ao2_ref(p->rtp, +1);
*instance = p->rtp;
res = AST_RTP_GLUE_RESULT_LOCAL;
}
ast_mutex_unlock(&p->lock);
return res;
}
static format_t gtalk_get_codec(struct ast_channel *chan)
{
struct gtalk_pvt *p = chan->tech_pvt;
return p->peercapability;
}
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)
{
struct gtalk_pvt *p;
p = chan->tech_pvt;
if (!p)
return -1;
ast_mutex_lock(&p->lock);
/* if (rtp)
ast_rtp_get_peer(rtp, &p->redirip);
else
memset(&p->redirip, 0, sizeof(p->redirip));
p->redircodecs = codecs; */
/* Reset lastrtprx timer */
ast_mutex_unlock(&p->lock);
return 0;
}
static struct ast_rtp_glue gtalk_rtp_glue = {
.type = "Gtalk",
.get_rtp_info = gtalk_get_rtp_peer,
.get_codec = gtalk_get_codec,
.update_peer = gtalk_set_rtp_peer,
};
static int gtalk_response(struct gtalk *client, char *from, ikspak *pak, const char *reasonstr, const char *reasonstr2)
{
iks *response = NULL, *error = NULL, *reason = NULL;
int res = -1;
response = iks_new("iq");
if (response) {
iks_insert_attrib(response, "type", "result");
iks_insert_attrib(response, "from", from);
iks_insert_attrib(response, "to", S_OR(iks_find_attrib(pak->x, "from"), ""));
iks_insert_attrib(response, "id", S_OR(iks_find_attrib(pak->x, "id"), ""));
if (reasonstr) {
error = iks_new("error");
if (error) {
iks_insert_attrib(error, "type", "cancel");
reason = iks_new(reasonstr);
if (reason)
iks_insert_node(error, reason);
iks_insert_node(response, error);
}
}
ast_aji_send(client->connection, response);
res = 0;
}
iks_delete(reason);
iks_delete(error);
iks_delete(response);
return res;
}
static int gtalk_is_answered(struct gtalk *client, ikspak *pak)
{
struct gtalk_pvt *tmp = NULL;
char *from;
iks *codec;
char s1[BUFSIZ], s2[BUFSIZ], s3[BUFSIZ];
int peernoncodeccapability;
ast_log(LOG_DEBUG, "The client is %s\n", client->name);
/* Make sure our new call does exist */
for (tmp = client->p; tmp; tmp = tmp->next) {
if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
break;
} else if (iks_find_with_attrib(pak->x, "ses:session", "id", tmp->sid)) {
break;
}
}
if (!tmp) {
ast_log(LOG_WARNING, "Could not find session in iq\n");
return -1;
}
/* codec points to the first <payload-type/> tag */
codec = iks_first_tag(iks_first_tag(iks_first_tag(pak->x)));
while (codec) {
char *codec_id = iks_find_attrib(codec, "id");
char *codec_name = iks_find_attrib(codec, "name");
if (!codec_id || !codec_name) {
codec = iks_next_tag(codec);
continue;
}
ast_rtp_codecs_payloads_set_m_type(
ast_rtp_instance_get_codecs(tmp->rtp),
tmp->rtp,
atoi(codec_id));
ast_rtp_codecs_payloads_set_rtpmap_type(
ast_rtp_instance_get_codecs(tmp->rtp),
tmp->rtp,
atoi(codec_id),
"audio",
codec_name,
0);
codec = iks_next_tag(codec);
}
/* Now gather all of the codecs that we are asked for */
ast_rtp_codecs_payload_formats(ast_rtp_instance_get_codecs(tmp->rtp), &tmp->peercapability, &peernoncodeccapability);
/* at this point, we received an awser from the remote Gtalk client,
which allows us to compare capabilities */
tmp->jointcapability = tmp->capability & tmp->peercapability;
if (!tmp->jointcapability) {
ast_log(LOG_WARNING, "Capabilities don't match : us - %s, peer - %s, combined - %s \n", ast_getformatname_multiple(s1, BUFSIZ, tmp->capability),
ast_getformatname_multiple(s2, BUFSIZ, tmp->peercapability),
ast_getformatname_multiple(s3, BUFSIZ, tmp->jointcapability));
/* close session if capabilities don't match */
ast_queue_hangup(tmp->owner);
return -1;
}
from = iks_find_attrib(pak->x, "to");
if (!from) {
from = client->connection->jid->full;
}
if (tmp->owner) {
ast_queue_control(tmp->owner, AST_CONTROL_ANSWER);
}
gtalk_update_stun(tmp->parent, tmp);
gtalk_response(client, from, pak, NULL, NULL);
return 1;
}
static int gtalk_is_accepted(struct gtalk *client, ikspak *pak)
{
struct gtalk_pvt *tmp;
char *from;
ast_log(LOG_DEBUG, "The client is %s\n", client->name);
/* find corresponding call */
for (tmp = client->p; tmp; tmp = tmp->next) {
if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid)) {
break;
}
}
from = iks_find_attrib(pak->x, "to");
if (!from) {
from = client->connection->jid->full;
}
if (tmp) {
gtalk_update_stun(tmp->parent, tmp);
} else {
ast_log(LOG_NOTICE, "Whoa, didn't find call during accept?!\n");
}
/* answer 'iq' packet to let the remote peer know that we're alive */
gtalk_response(client, from, pak, NULL, NULL);
return 1;
}
static int gtalk_handle_dtmf(struct gtalk *client, ikspak *pak)
{
struct gtalk_pvt *tmp;
iks *dtmfnode = NULL, *dtmfchild = NULL;
char *dtmf;
char *from;
/* Make sure our new call doesn't exist yet */
for (tmp = client->p; tmp; tmp = tmp->next) {
if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) || iks_find_with_attrib(pak->x, "gtalk", "sid", tmp->sid))
break;
}
from = iks_find_attrib(pak->x, "to");
if (!from) {
from = client->connection->jid->full;
}
if (tmp) {
if(iks_find_with_attrib(pak->x, "dtmf-method", "method", "rtp")) {
gtalk_response(client, from, pak,
"feature-not-implemented xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'",
"unsupported-dtmf-method xmlns='http://jabber.org/protocol/gtalk/info/dtmf#errors'");
return -1;
}
if ((dtmfnode = iks_find(pak->x, "dtmf"))) {
if((dtmf = iks_find_attrib(dtmfnode, "code"))) {
if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-up")) {
struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
f.subclass.integer = dtmf[0];
ast_queue_frame(tmp->owner, &f);
ast_verbose("GOOGLE! DTMF-relay event received: %c\n", (int) f.subclass.integer);
} else if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-down")) {
struct ast_frame f = {AST_FRAME_DTMF_END, };
f.subclass.integer = dtmf[0];
ast_queue_frame(tmp->owner, &f);
ast_verbose("GOOGLE! DTMF-relay event received: %c\n", (int) f.subclass.integer);
} else if(iks_find_attrib(pak->x, "dtmf")) { /* 250 millasecond default */
struct ast_frame f = {AST_FRAME_DTMF, };
f.subclass.integer = dtmf[0];
ast_queue_frame(tmp->owner, &f);
ast_verbose("GOOGLE! DTMF-relay event received: %c\n", (int) f.subclass.integer);
}
}
} else if ((dtmfnode = iks_find_with_attrib(pak->x, "gtalk", "action", "session-info"))) {
if((dtmfchild = iks_find(dtmfnode, "dtmf"))) {
if((dtmf = iks_find_attrib(dtmfchild, "code"))) {
if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-up")) {
struct ast_frame f = {AST_FRAME_DTMF_END, };
f.subclass.integer = dtmf[0];
ast_queue_frame(tmp->owner, &f);
ast_verbose("GOOGLE! DTMF-relay event received: %c\n", (int) f.subclass.integer);
} else if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-down")) {
struct ast_frame f = {AST_FRAME_DTMF_BEGIN, };
f.subclass.integer = dtmf[0];
ast_queue_frame(tmp->owner, &f);
ast_verbose("GOOGLE! DTMF-relay event received: %c\n", (int) f.subclass.integer);
}
}
}
}
gtalk_response(client, from, pak, NULL, NULL);
return 1;
} else {
ast_log(LOG_NOTICE, "Whoa, didn't find call!\n");
}
gtalk_response(client, from, pak, NULL, NULL);
return 1;
}
static int gtalk_hangup_farend(struct gtalk *client, ikspak *pak)
{
struct gtalk_pvt *tmp;
char *from;
ast_debug(1, "The client is %s\n", client->name);
/* Make sure our new call doesn't exist yet */
for (tmp = client->p; tmp; tmp = tmp->next) {
if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) ||
(iks_find_attrib(pak->query, "id") && !strcmp(iks_find_attrib(pak->query, "id"), tmp->sid))) {
break;
}
}
from = iks_find_attrib(pak->x, "to");
if (!from) {
from = client->connection->jid->full;
}
if (tmp) {
tmp->alreadygone = 1;
if (tmp->owner) {
ast_queue_hangup(tmp->owner);
}
} else {
ast_log(LOG_NOTICE, "Whoa, didn't find call during hangup!\n");
}
gtalk_response(client, from, pak, NULL, NULL);
return 1;
}
static int gtalk_get_local_ip(struct ast_sockaddr *ourip)
{
struct ast_sockaddr root;
struct ast_sockaddr bindaddr_tmp;
struct ast_sockaddr *addrs;
int addrs_cnt;
/* If bind address is not 0.0.0.0, then bindaddr is our local ip. */
ast_sockaddr_from_sin(&bindaddr_tmp, &bindaddr);
if (!ast_sockaddr_is_any(&bindaddr_tmp)) {
ast_sockaddr_copy(ourip, &bindaddr_tmp);
return 0;
}
/* If no bind address was provided, lets see what ip we would use to connect to google.com and use that.
* If you can't resolve google.com from your network, then this module is useless for you anyway. */
if ((addrs_cnt = ast_sockaddr_resolve(&addrs, "google.com", PARSE_PORT_FORBID, AF_INET)) > 0) {
ast_sockaddr_copy(&root, &addrs[0]);
ast_free(addrs);
if (!ast_ouraddrfor(&root, ourip)) {
return 0;
}
}
/* As a last resort, use this function to find our local address. */
return ast_find_ourip(ourip, &bindaddr_tmp, AF_INET);
}
static int gtalk_create_candidates(struct gtalk *client, struct gtalk_pvt *p, char *sid, char *from, char *to)
{
struct gtalk_candidate *tmp;
struct aji_client *c = client->connection;
struct gtalk_candidate *ours1 = NULL, *ours2 = NULL;
struct sockaddr_in sin = { 0, };
struct ast_sockaddr sin_tmp;
struct ast_sockaddr us;
iks *iq, *gtalk, *candidate, *transport;
char user[17], pass[17], preference[5], port[7];
char *lowerfrom = NULL;
iq = iks_new("iq");
gtalk = iks_new("session");
candidate = iks_new("candidate");
transport = iks_new("transport");
if (!iq || !gtalk || !candidate || !transport) {
ast_log(LOG_ERROR, "Memory allocation error\n");
goto safeout;
}
ours1 = ast_calloc(1, sizeof(*ours1));
ours2 = ast_calloc(1, sizeof(*ours2));
if (!ours1 || !ours2)
goto safeout;
iks_insert_attrib(transport, "xmlns",GOOGLE_TRANSPORT_NS);
iks_insert_node(iq, gtalk);
iks_insert_node(gtalk,candidate);
iks_insert_node(gtalk,transport);
for (; p; p = p->next) {
if (!strcasecmp(p->sid, sid))
break;
}
if (!p) {
ast_log(LOG_NOTICE, "No matching gtalk session - SID %s!\n", sid);
goto safeout;
}
ast_rtp_instance_get_local_address(p->rtp, &sin_tmp);
ast_sockaddr_to_sin(&sin_tmp, &sin);
gtalk_get_local_ip(&us);
if (!strcmp(ast_sockaddr_stringify_addr(&us), "127.0.0.1")) {
ast_log(LOG_WARNING, "Found a loopback IP on the system, check your network configuration or set the bindaddr attribute.");
}
/* Setup our gtalk candidates */
ast_copy_string(ours1->name, "rtp", sizeof(ours1->name));
ours1->port = ntohs(sin.sin_port);
ours1->preference = 1;
snprintf(user, sizeof(user), "%08lx%08lx", ast_random(), ast_random());
snprintf(pass, sizeof(pass), "%08lx%08lx", ast_random(), ast_random());
ast_copy_string(ours1->username, user, sizeof(ours1->username));
ast_copy_string(ours1->password, pass, sizeof(ours1->password));
ast_copy_string(ours1->ip, ast_sockaddr_stringify_addr(&us),
sizeof(ours1->ip));
ours1->protocol = AJI_PROTOCOL_UDP;
ours1->type = AJI_CONNECT_LOCAL;
ours1->generation = 0;
p->ourcandidates = ours1;
/* XXX this is a blocking action. We send a STUN request to the server
* and wait for the response. If blocking here is a problem the STUN requests/responses
* for the externip may need to be done differently. */
gtalk_update_externip();
if (!ast_strlen_zero(externip)) {
ast_copy_string(ours2->username, user, sizeof(ours2->username));
ast_copy_string(ours2->password, pass, sizeof(ours2->password));
ast_copy_string(ours2->ip, externip, sizeof(ours2->ip));
ast_copy_string(ours2->name, "rtp", sizeof(ours1->name));
ours2->port = ntohs(sin.sin_port);
ours2->preference = 0.9;
ours2->protocol = AJI_PROTOCOL_UDP;
ours2->type = AJI_CONNECT_STUN;
ours2->generation = 0;
ours1->next = ours2;
ours2 = NULL;
}
ours1 = NULL;
for (tmp = p->ourcandidates; tmp; tmp = tmp->next) {
snprintf(port, sizeof(port), "%d", tmp->port);
snprintf(preference, sizeof(preference), "%.2f", tmp->preference);
iks_insert_attrib(iq, "from", to);
iks_insert_attrib(iq, "to", from);
iks_insert_attrib(iq, "type", "set");
iks_insert_attrib(iq, "id", c->mid);
ast_aji_increment_mid(c->mid);
iks_insert_attrib(gtalk, "type", "candidates");
iks_insert_attrib(gtalk, "id", sid);
/* put the initiator attribute to lower case if we receive the call
* otherwise GoogleTalk won't establish the session */
if (!p->initiator) {
char c;
char *t = lowerfrom = ast_strdupa(from);
while (((c = *t) != '/') && (*t++ = tolower(c)));
}
iks_insert_attrib(gtalk, "initiator", (p->initiator) ? to : lowerfrom);
iks_insert_attrib(gtalk, "xmlns", GOOGLE_NS);
iks_insert_attrib(candidate, "name", tmp->name);
iks_insert_attrib(candidate, "address", tmp->ip);
iks_insert_attrib(candidate, "port", port);
iks_insert_attrib(candidate, "username", tmp->username);
iks_insert_attrib(candidate, "password", tmp->password);
iks_insert_attrib(candidate, "preference", preference);
if (tmp->protocol == AJI_PROTOCOL_UDP)
iks_insert_attrib(candidate, "protocol", "udp");
if (tmp->protocol == AJI_PROTOCOL_SSLTCP)
iks_insert_attrib(candidate, "protocol", "ssltcp");
if (tmp->type == AJI_CONNECT_STUN)
iks_insert_attrib(candidate, "type", "stun");
if (tmp->type == AJI_CONNECT_LOCAL)
iks_insert_attrib(candidate, "type", "local");
if (tmp->type == AJI_CONNECT_RELAY)
iks_insert_attrib(candidate, "type", "relay");
iks_insert_attrib(candidate, "network", "0");
iks_insert_attrib(candidate, "generation", "0");
ast_aji_send(c, iq);
}
p->laststun = 0;
safeout:
if (ours1)
ast_free(ours1);
if (ours2)
ast_free(ours2);
iks_delete(iq);
iks_delete(gtalk);
iks_delete(candidate);
iks_delete(transport);
return 1;
}
static struct gtalk_pvt *gtalk_alloc(struct gtalk *client, const char *us, const char *them, const char *sid)
{
struct gtalk_pvt *tmp = NULL;
struct aji_resource *resources = NULL;
struct aji_buddy *buddy;
char idroster[200];
char *data, *exten = NULL;
struct ast_sockaddr bindaddr_tmp;
ast_debug(1, "The client is %s for alloc\n", client->name);
if (!sid && !strchr(them, '/')) { /* I started call! */
if (!strcasecmp(client->name, "guest")) {
buddy = ASTOBJ_CONTAINER_FIND(&client->connection->buddies, them);
if (buddy) {
resources = buddy->resources;
}
} else if (client->buddy) {
resources = client->buddy->resources;
}
while (resources) {
if (resources->cap->jingle) {
break;
}
resources = resources->next;
}
if (resources) {
snprintf(idroster, sizeof(idroster), "%s/%s", them, resources->resource);
} else if ((*them == '+') || (strstr(them, "@voice.google.com"))) {
snprintf(idroster, sizeof(idroster), "%s", them);
} else {
ast_log(LOG_ERROR, "no gtalk capable clients to talk to.\n");
return NULL;
}
}
if (!(tmp = ast_calloc(1, sizeof(*tmp)))) {
return NULL;
}
memcpy(&tmp->prefs, &client->prefs, sizeof(struct ast_codec_pref));
if (sid) {
ast_copy_string(tmp->sid, sid, sizeof(tmp->sid));
ast_copy_string(tmp->them, them, sizeof(tmp->them));
ast_copy_string(tmp->us, us, sizeof(tmp->us));
} else {
snprintf(tmp->sid, sizeof(tmp->sid), "%08lx%08lx", ast_random(), ast_random());
ast_copy_string(tmp->them, idroster, sizeof(tmp->them));
ast_copy_string(tmp->us, us, sizeof(tmp->us));
tmp->initiator = 1;
}
/* clear codecs */
bindaddr.sin_family = AF_INET;
ast_sockaddr_from_sin(&bindaddr_tmp, &bindaddr);
if (!(tmp->rtp = ast_rtp_instance_new("asterisk", sched, &bindaddr_tmp, NULL))) {
ast_log(LOG_ERROR, "Failed to create a new RTP instance (possibly an invalid bindaddr?)\n");
ast_free(tmp);
return NULL;
}
ast_rtp_instance_set_prop(tmp->rtp, AST_RTP_PROPERTY_RTCP, 1);
ast_rtp_instance_set_prop(tmp->rtp, AST_RTP_PROPERTY_STUN, 1);
ast_rtp_instance_set_prop(tmp->rtp, AST_RTP_PROPERTY_DTMF, 1);
ast_rtp_instance_dtmf_mode_set(tmp->rtp, AST_RTP_DTMF_MODE_RFC2833);
ast_rtp_codecs_payloads_clear(ast_rtp_instance_get_codecs(tmp->rtp), tmp->rtp);
/* add user configured codec capabilites */
if (client->capability) {
tmp->capability = client->capability;
} else if (global_capability) {
tmp->capability = global_capability;
}
tmp->parent = client;
if (!tmp->rtp) {
ast_log(LOG_WARNING, "Out of RTP sessions?\n");
ast_free(tmp);
return NULL;
}
/* Set CALLERID(name) to the full JID of the remote peer */
ast_copy_string(tmp->cid_name, tmp->them, sizeof(tmp->cid_name));
if(strchr(tmp->us, '/')) {
data = ast_strdupa(tmp->us);
exten = strsep(&data, "/");
} else {
exten = tmp->us;
}
ast_copy_string(tmp->exten, exten, sizeof(tmp->exten));
ast_mutex_init(&tmp->lock);
ast_mutex_lock(&gtalklock);
tmp->next = client->p;
client->p = tmp;
ast_mutex_unlock(&gtalklock);
return tmp;
}
/*! \brief Start new gtalk channel */
static struct ast_channel *gtalk_new(struct gtalk *client, struct gtalk_pvt *i, int state, const char *title, const char *linkedid)
{
struct ast_channel *tmp;
int fmt;
int what;
const char *n2;
if (title)
n2 = title;
else
n2 = i->us;
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);
if (!tmp) {
ast_log(LOG_WARNING, "Unable to allocate Gtalk channel structure!\n");
return NULL;
}
tmp->tech = &gtalk_tech;
/* Select our native format based on codec preference until we receive
something from another device to the contrary. */
if (i->jointcapability)
what = i->jointcapability;
else if (i->capability)
what = i->capability;
else
what = global_capability;
/* Set Frame packetization */
if (i->rtp) {
ast_rtp_codecs_packetization_set(ast_rtp_instance_get_codecs(i->rtp), i->rtp, &i->prefs);
}
tmp->nativeformats = ast_codec_choose(&i->prefs, what, 1) | (i->jointcapability & AST_FORMAT_VIDEO_MASK);
fmt = ast_best_codec(tmp->nativeformats);
if (i->rtp) {
ast_channel_set_fd(tmp, 0, ast_rtp_instance_fd(i->rtp, 0));
ast_channel_set_fd(tmp, 1, ast_rtp_instance_fd(i->rtp, 1));
}
if (i->vrtp) {
ast_channel_set_fd(tmp, 2, ast_rtp_instance_fd(i->vrtp, 0));
ast_channel_set_fd(tmp, 3, ast_rtp_instance_fd(i->vrtp, 1));
}
if (state == AST_STATE_RING)
tmp->rings = 1;
tmp->adsicpe = AST_ADSI_UNAVAILABLE;
tmp->writeformat = fmt;
tmp->rawwriteformat = fmt;
tmp->readformat = fmt;
tmp->rawreadformat = fmt;
tmp->tech_pvt = i;
tmp->callgroup = client->callgroup;
tmp->pickupgroup = client->pickupgroup;
tmp->caller.id.name.presentation = client->callingpres;
tmp->caller.id.number.presentation = client->callingpres;
if (!ast_strlen_zero(client->accountcode))
ast_string_field_set(tmp, accountcode, client->accountcode);
if (client->amaflags)
tmp->amaflags = client->amaflags;
if (!ast_strlen_zero(client->language))
ast_string_field_set(tmp, language, client->language);
if (!ast_strlen_zero(client->musicclass))
ast_string_field_set(tmp, musicclass, client->musicclass);
if (!ast_strlen_zero(client->parkinglot))
ast_string_field_set(tmp, parkinglot, client->parkinglot);
i->owner = tmp;
ast_module_ref(ast_module_info->self);
ast_copy_string(tmp->context, client->context, sizeof(tmp->context));
ast_copy_string(tmp->exten, i->exten, sizeof(tmp->exten));
if (!ast_strlen_zero(i->exten) && strcmp(i->exten, "s")) {
tmp->dialed.number.str = ast_strdup(i->exten);
}
tmp->priority = 1;
if (i->rtp)
ast_jb_configure(tmp, &global_jbconf);
if (state != AST_STATE_DOWN && ast_pbx_start(tmp)) {
ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
tmp->hangupcause = AST_CAUSE_SWITCH_CONGESTION;
ast_hangup(tmp);
tmp = NULL;
} else {
manager_event(EVENT_FLAG_SYSTEM, "ChannelUpdate",
"Channel: %s\r\nChanneltype: %s\r\nGtalk-SID: %s\r\n",
i->owner ? i->owner->name : "", "Gtalk", i->sid);
}
return tmp;
}
static int gtalk_action(struct gtalk *client, struct gtalk_pvt *p, const char *action)
{
iks *request, *session = NULL;
int res = -1;
char *lowerthem = NULL;
request = iks_new("iq");
if (request) {
iks_insert_attrib(request, "type", "set");
iks_insert_attrib(request, "from", p->us);
iks_insert_attrib(request, "to", p->them);
iks_insert_attrib(request, "id", client->connection->mid);
ast_aji_increment_mid(client->connection->mid);
session = iks_new("session");
if (session) {
iks_insert_attrib(session, "type", action);
iks_insert_attrib(session, "id", p->sid);
/* put the initiator attribute to lower case if we receive the call
* otherwise GoogleTalk won't establish the session */
if (!p->initiator) {
char c;
char *t = lowerthem = ast_strdupa(p->them);
while (((c = *t) != '/') && (*t++ = tolower(c)));
}
iks_insert_attrib(session, "initiator", p->initiator ? p->us : lowerthem);
iks_insert_attrib(session, "xmlns", GOOGLE_NS);
iks_insert_node(request, session);
ast_aji_send(client->connection, request);
res = 0;
}
}
iks_delete(session);
iks_delete(request);
return res;
}
static void gtalk_free_candidates(struct gtalk_candidate *candidate)
{
struct gtalk_candidate *last;
while (candidate) {
last = candidate;
candidate = candidate->next;
ast_free(last);
}
}
static void gtalk_free_pvt(struct gtalk *client, struct gtalk_pvt *p)
{
struct gtalk_pvt *cur, *prev = NULL;
cur = client->p;
while (cur) {
if (cur == p) {
if (prev)
prev->next = p->next;
else
client->p = p->next;
break;
}
prev = cur;
cur = cur->next;
}
if (p->ringrule)
iks_filter_remove_rule(p->parent->connection->f, p->ringrule);
if (p->owner)
ast_log(LOG_WARNING, "Uh oh, there's an owner, this is going to be messy.\n");
if (p->rtp)
ast_rtp_instance_destroy(p->rtp);
if (p->vrtp)
ast_rtp_instance_destroy(p->vrtp);
gtalk_free_candidates(p->theircandidates);
ast_free(p);
}
static int gtalk_newcall(struct gtalk *client, ikspak *pak)
{
struct gtalk_pvt *p, *tmp = client->p;
struct ast_channel *chan;
int res;
iks *codec;
char *from = NULL;
char s1[BUFSIZ], s2[BUFSIZ], s3[BUFSIZ];
int peernoncodeccapability;
char *sid;
/* Make sure our new call doesn't exist yet */
from = iks_find_attrib(pak->x,"to");
if (!from) {
from = client->connection->jid->full;
}
while (tmp) {
if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) ||
(iks_find_attrib(pak->query, "id") && !strcmp(iks_find_attrib(pak->query, "id"), tmp->sid))) {
ast_log(LOG_NOTICE, "Ignoring duplicate call setup on SID %s\n", tmp->sid);
gtalk_response(client, from, pak, "out-of-order", NULL);
return -1;
}
tmp = tmp->next;
}
if (!strcasecmp(client->name, "guest")){
/* the guest account is not tied to any configured XMPP client,
let's set it now */
client->connection = ast_aji_get_client(from);
if (!client->connection) {
ast_log(LOG_ERROR, "No XMPP client to talk to, us (partial JID) : %s\n", from);
return -1;
}
}
if (!(sid = iks_find_attrib(pak->query, "id"))) {
ast_log(LOG_WARNING, "Received Initiate without id attribute. Can not start call.\n");
return -1;
}
p = gtalk_alloc(client, from, pak->from->full, sid);
if (!p) {
ast_log(LOG_WARNING, "Unable to allocate gtalk structure!\n");
return -1;
}
chan = gtalk_new(client, p, AST_STATE_DOWN, pak->from->user, NULL);
if (!chan) {
gtalk_free_pvt(client, p);
return -1;
}
ast_mutex_lock(&p->lock);
ast_copy_string(p->them, pak->from->full, sizeof(p->them));
ast_copy_string(p->sid, sid, sizeof(p->sid));
/* codec points to the first <payload-type/> tag */
codec = iks_first_tag(iks_first_tag(iks_first_tag(pak->x)));
while (codec) {
char *codec_id = iks_find_attrib(codec, "id");
char *codec_name = iks_find_attrib(codec, "name");
if (!codec_id || !codec_name) {
codec = iks_next_tag(codec);
continue;
}
if (!strcmp(S_OR(iks_name(codec), ""), "vid:payload-type") && p->vrtp) {
ast_rtp_codecs_payloads_set_m_type(
ast_rtp_instance_get_codecs(p->vrtp),
p->vrtp,
atoi(codec_id));
ast_rtp_codecs_payloads_set_rtpmap_type(
ast_rtp_instance_get_codecs(p->vrtp),
p->vrtp,
atoi(codec_id),
"video",
codec_name,
0);
} else {
ast_rtp_codecs_payloads_set_m_type(
ast_rtp_instance_get_codecs(p->rtp),
p->rtp,
atoi(codec_id));
ast_rtp_codecs_payloads_set_rtpmap_type(
ast_rtp_instance_get_codecs(p->rtp),
p->rtp,
atoi(codec_id),
"audio",
codec_name,
0);
}
codec = iks_next_tag(codec);
}
/* Now gather all of the codecs that we are asked for */
ast_rtp_codecs_payload_formats(ast_rtp_instance_get_codecs(p->rtp), &p->peercapability, &peernoncodeccapability);
p->jointcapability = p->capability & p->peercapability;
ast_mutex_unlock(&p->lock);
ast_setstate(chan, AST_STATE_RING);
if (!p->jointcapability) {
ast_log(LOG_WARNING, "Capabilities don't match : us - %s, peer - %s, combined - %s \n", ast_getformatname_multiple(s1, BUFSIZ, p->capability),
ast_getformatname_multiple(s2, BUFSIZ, p->peercapability),
ast_getformatname_multiple(s3, BUFSIZ, p->jointcapability));
/* close session if capabilities don't match */
gtalk_action(client, p, "reject");
p->alreadygone = 1;
gtalk_hangup(chan);
ast_channel_release(chan);
return -1;
}
res = ast_pbx_start(chan);
switch (res) {
case AST_PBX_FAILED:
ast_log(LOG_WARNING, "Failed to start PBX :(\n");
gtalk_response(client, from, pak, "service-unavailable", NULL);
break;
case AST_PBX_CALL_LIMIT:
ast_log(LOG_WARNING, "Failed to start PBX (call limit reached) \n");
gtalk_response(client, from, pak, "service-unavailable", NULL);
break;
case AST_PBX_SUCCESS:
gtalk_response(client, from, pak, NULL, NULL);
gtalk_create_candidates(client, p, p->sid, p->them, p->us);
/* nothing to do */
break;
}
return 1;
}
static int gtalk_update_externip(void)
{
int sock;
char *newaddr;
struct sockaddr_in answer = { 0, };
struct sockaddr_in *dst;
struct ast_sockaddr tmp_dst;
if (!stunaddr.sin_addr.s_addr) {
return -1;
}
dst = &stunaddr;
sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0) {
ast_log(LOG_WARNING, "Unable to create STUN socket: %s\n", strerror(errno));
return -1;
}
ast_sockaddr_from_sin(&tmp_dst, dst);
if (ast_connect(sock, &tmp_dst) != 0) {
ast_log(LOG_WARNING, "STUN Failed to connect to %s\n", ast_sockaddr_stringify(&tmp_dst));
close(sock);
return -1;
}
if ((ast_stun_request(sock, &stunaddr, NULL, &answer))) {
close(sock);
return -1;
}
newaddr = ast_strdupa(ast_inet_ntoa(answer.sin_addr));
memcpy(externip, newaddr, sizeof(externip));
close(sock);
return 0;
}
static int gtalk_update_stun(struct gtalk *client, struct gtalk_pvt *p)
{
struct gtalk_candidate *tmp;
struct hostent *hp;
struct ast_hostent ahp;
struct sockaddr_in sin = { 0, };
struct sockaddr_in aux = { 0, };
struct ast_sockaddr sin_tmp;
struct ast_sockaddr aux_tmp;
if (time(NULL) == p->laststun)
return 0;
tmp = p->theircandidates;
p->laststun = time(NULL);
while (tmp) {
char username[256];
/* Find the IP address of the host */
if (!(hp = ast_gethostbyname(tmp->ip, &ahp))) {
ast_log(LOG_WARNING, "Could not get host by name for %s\n", tmp->ip);
tmp = tmp->next;
continue;
}
sin.sin_family = AF_INET;
memcpy(&sin.sin_addr, hp->h_addr, sizeof(sin.sin_addr));
sin.sin_port = htons(tmp->port);
snprintf(username, sizeof(username), "%s%s", tmp->username, p->ourcandidates->username);
/* Find out the result of the STUN */
ast_rtp_instance_get_remote_address(p->rtp, &aux_tmp);
ast_sockaddr_to_sin(&aux_tmp, &aux);
/* If the STUN result is different from the IP of the hostname,
* lock on the stun IP of the hostname advertised by the
* remote client */
if (aux.sin_addr.s_addr && (aux.sin_addr.s_addr != sin.sin_addr.s_addr)) {
ast_rtp_instance_stun_request(p->rtp, &aux_tmp, username);
} else {
ast_sockaddr_from_sin(&sin_tmp, &sin);
ast_rtp_instance_stun_request(p->rtp, &sin_tmp, username);
}
if (aux.sin_addr.s_addr) {
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);
ast_debug(4, "Sending STUN request to %s\n", tmp->ip);
}
tmp = tmp->next;
}
return 1;
}
static int gtalk_add_candidate(struct gtalk *client, ikspak *pak)
{
struct gtalk_pvt *p = NULL, *tmp = NULL;
struct aji_client *c = client->connection;
struct gtalk_candidate *newcandidate = NULL;
iks *traversenodes = NULL, *receipt = NULL;
char *from;
from = iks_find_attrib(pak->x,"to");
if (!from) {
from = c->jid->full;
}
for (tmp = client->p; tmp; tmp = tmp->next) {
if (iks_find_with_attrib(pak->x, "session", "id", tmp->sid) ||
(iks_find_attrib(pak->query, "id") && !strcmp(iks_find_attrib(pak->query, "id"), tmp->sid))) {
p = tmp;
break;
}
}
if (!p) {
return -1;
}
traversenodes = pak->query;
while(traversenodes) {
if(!strcasecmp(S_OR(iks_name(traversenodes), ""), "session")) {
traversenodes = iks_first_tag(traversenodes);
continue;
}
if(!strcasecmp(S_OR(iks_name(traversenodes), ""), "ses:session")) {
traversenodes = iks_child(traversenodes);
continue;
}
if(!strcasecmp(S_OR(iks_name(traversenodes), ""), "candidate") || !strcasecmp(S_OR(iks_name(traversenodes), ""), "ses:candidate")) {
newcandidate = ast_calloc(1, sizeof(*newcandidate));
if (!newcandidate)
return 0;
ast_copy_string(newcandidate->name,
S_OR(iks_find_attrib(traversenodes, "name"), ""),
sizeof(newcandidate->name));
ast_copy_string(newcandidate->ip,
S_OR(iks_find_attrib(traversenodes, "address"), ""),
sizeof(newcandidate->ip));
newcandidate->port = atoi(iks_find_attrib(traversenodes, "port"));
ast_copy_string(newcandidate->username,
S_OR(iks_find_attrib(traversenodes, "username"), ""),
sizeof(newcandidate->username));
ast_copy_string(newcandidate->password,
S_OR(iks_find_attrib(traversenodes, "password"), ""),
sizeof(newcandidate->password));
newcandidate->preference = atof(iks_find_attrib(traversenodes, "preference"));
if (!strcasecmp(S_OR(iks_find_attrib(traversenodes, "protocol"), ""), "udp"))
newcandidate->protocol = AJI_PROTOCOL_UDP;
if (!strcasecmp(S_OR(iks_find_attrib(traversenodes, "protocol"), ""), "ssltcp"))
newcandidate->protocol = AJI_PROTOCOL_SSLTCP;
if (!strcasecmp(S_OR(iks_find_attrib(traversenodes, "type"), ""), "stun"))
newcandidate->type = AJI_CONNECT_STUN;
if (!strcasecmp(S_OR(iks_find_attrib(traversenodes, "type"), ""), "local"))
newcandidate->type = AJI_CONNECT_LOCAL;
if (!strcasecmp(S_OR(iks_find_attrib(traversenodes, "type"), ""), "relay"))
newcandidate->type = AJI_CONNECT_RELAY;
ast_copy_string(newcandidate->network,
S_OR(iks_find_attrib(traversenodes, "network"), ""),
sizeof(newcandidate->network));
newcandidate->generation = atoi(S_OR(iks_find_attrib(traversenodes, "generation"), "0"));
newcandidate->next = NULL;
newcandidate->next = p->theircandidates;
p->theircandidates = newcandidate;
p->laststun = 0;
gtalk_update_stun(p->parent, p);
newcandidate = NULL;
}
traversenodes = iks_next_tag(traversenodes);
}
receipt = iks_new("iq");
iks_insert_attrib(receipt, "type", "result");
iks_insert_attrib(receipt, "from", from);
iks_insert_attrib(receipt, "to", S_OR(iks_find_attrib(pak->x, "from"), ""));
iks_insert_attrib(receipt, "id", S_OR(iks_find_attrib(pak->x, "id"), ""));
ast_aji_send(c, receipt);
iks_delete(receipt);
return 1;
}
static struct ast_frame *gtalk_rtp_read(struct ast_channel *ast, struct gtalk_pvt *p)
{
struct ast_frame *f;
if (!p->rtp) {
return &ast_null_frame;
}
f = ast_rtp_instance_read(p->rtp, 0);
gtalk_update_stun(p->parent, p);
if (p->owner) {
/* We already hold the channel lock */
if (f->frametype == AST_FRAME_VOICE) {
if (f->subclass.codec != (p->owner->nativeformats & AST_FORMAT_AUDIO_MASK)) {
ast_debug(1, "Oooh, format changed to %s\n", ast_getformatname(f->subclass.codec));
p->owner->nativeformats =
(p->owner->nativeformats & AST_FORMAT_VIDEO_MASK) | f->subclass.codec;
ast_set_read_format(p->owner, p->owner->readformat);
ast_set_write_format(p->owner, p->owner->writeformat);
}
/* if ((ast_test_flag(p, SIP_DTMF) == SIP_DTMF_INBAND) && p->vad) {
f = ast_dsp_process(p->owner, p->vad, f);
if (option_debug && f && (f->frametype == AST_FRAME_DTMF))
ast_debug(1, "* Detected inband DTMF '%c'\n", f->subclass);
} */
}
}
return f;
}
static struct ast_frame *gtalk_read(struct ast_channel *ast)
{
struct ast_frame *fr;
struct gtalk_pvt *p = ast->tech_pvt;
ast_mutex_lock(&p->lock);
fr = gtalk_rtp_read(ast, p);
ast_mutex_unlock(&p->lock);
return fr;
}
/*! \brief Send frame to media channel (rtp) */
static int gtalk_write(struct ast_channel *ast, struct ast_frame *frame)
{
struct gtalk_pvt *p = ast->tech_pvt;
int res = 0;
char buf[256];
switch (frame->frametype) {
case AST_FRAME_VOICE:
if (!(frame->subclass.codec & ast->nativeformats)) {
ast_log(LOG_WARNING,
"Asked to transmit frame type %s, while native formats is %s (read/write = %s/%s)\n",
ast_getformatname(frame->subclass.codec),
ast_getformatname_multiple(buf, sizeof(buf), ast->nativeformats),
ast_getformatname(ast->readformat),
ast_getformatname(ast->writeformat));
return 0;
}
if (p) {
ast_mutex_lock(&p->lock);
if (p->rtp) {
res = ast_rtp_instance_write(p->rtp, frame);
}
ast_mutex_unlock(&p->lock);
}
break;
case AST_FRAME_VIDEO:
if (p) {
ast_mutex_lock(&p->lock);
if (p->vrtp) {
res = ast_rtp_instance_write(p->vrtp, frame);
}
ast_mutex_unlock(&p->lock);
}
break;
case AST_FRAME_IMAGE:
return 0;
break;
default:
ast_log(LOG_WARNING, "Can't send %d type frames with Gtalk write\n",
frame->frametype);
return 0;
}
return res;
}
static int gtalk_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
{
struct gtalk_pvt *p = newchan->tech_pvt;
ast_mutex_lock(&p->lock);
if ((p->owner != oldchan)) {
ast_mutex_unlock(&p->lock);
return -1;
}
if (p->owner == oldchan)
p->owner = newchan;
ast_mutex_unlock(&p->lock);
return 0;
}
static int gtalk_indicate(struct ast_channel *ast, int condition, const void *data, size_t datalen)
{
int res = 0;
switch (condition) {
case AST_CONTROL_HOLD:
ast_moh_start(ast, data, NULL);
break;
case AST_CONTROL_UNHOLD:
ast_moh_stop(ast);
break;
default:
ast_debug(3, "Don't know how to indicate condition '%d'\n", condition);
res = -1;
}
return res;
}
static int gtalk_sendtext(struct ast_channel *chan, const char *text)
{
int res = 0;
struct aji_client *client = NULL;
struct gtalk_pvt *p = chan->tech_pvt;
if (!p->parent) {
ast_log(LOG_ERROR, "Parent channel not found\n");
return -1;
}
if (!p->parent->connection) {
ast_log(LOG_ERROR, "XMPP client not found\n");
return -1;
}
client = p->parent->connection;
res = ast_aji_send_chat(client, p->them, text);
return res;
}
static int gtalk_digit_begin(struct ast_channel *chan, char digit)
{
struct gtalk_pvt *p = chan->tech_pvt;
int res = 0;
ast_mutex_lock(&p->lock);
if (p->rtp) {
ast_rtp_instance_dtmf_begin(p->rtp, digit);
} else {
res = -1;
}
ast_mutex_unlock(&p->lock);
return res;
}
static int gtalk_digit_end(struct ast_channel *chan, char digit, unsigned int duration)
{
struct gtalk_pvt *p = chan->tech_pvt;
int res = 0;
ast_mutex_lock(&p->lock);
if (p->rtp) {
ast_rtp_instance_dtmf_end_with_duration(p->rtp, digit, duration);
} else {
res = -1;
}
ast_mutex_unlock(&p->lock);
return res;
}
/* This function is of not in use at the moment, but I am choosing to leave this
* within the code base as a reference to how DTMF is possible through
* jingle signaling. However, google currently does DTMF through the RTP. */
#if 0
static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration)
{
struct gtalk_pvt *p = ast->tech_pvt;
struct gtalk *client = p->parent;
iks *iq, *gtalk, *dtmf;
char buffer[2] = {digit, '\0'};
char *lowerthem = NULL;
iq = iks_new("iq");
gtalk = iks_new("gtalk");
dtmf = iks_new("dtmf");
if(!iq || !gtalk || !dtmf) {
iks_delete(iq);
iks_delete(gtalk);
iks_delete(dtmf);
ast_log(LOG_ERROR, "Did not send dtmf do to memory issue\n");
return -1;
}
iks_insert_attrib(iq, "type", "set");
iks_insert_attrib(iq, "to", p->them);
iks_insert_attrib(iq, "from", p->us);
iks_insert_attrib(iq, "id", client->connection->mid);
ast_aji_increment_mid(client->connection->mid);
iks_insert_attrib(gtalk, "xmlns", "http://jabber.org/protocol/gtalk");
iks_insert_attrib(gtalk, "action", "session-info");
// put the initiator attribute to lower case if we receive the call
// otherwise GoogleTalk won't establish the session
if (!p->initiator) {
char c;
char *t = lowerthem = ast_strdupa(p->them);
while (((c = *t) != '/') && (*t++ = tolower(c)));
}
iks_insert_attrib(gtalk, "initiator", p->initiator ? p->us: lowerthem);
iks_insert_attrib(gtalk, "sid", p->sid);
iks_insert_attrib(dtmf, "xmlns", "http://jabber.org/protocol/gtalk/info/dtmf");
iks_insert_attrib(dtmf, "code", buffer);
iks_insert_node(iq, gtalk);
iks_insert_node(gtalk, dtmf);
ast_mutex_lock(&p->lock);
if (ast->dtmff.frametype == AST_FRAME_DTMF_BEGIN || duration == 0) {
iks_insert_attrib(dtmf, "action", "button-down");
} else if (ast->dtmff.frametype == AST_FRAME_DTMF_END || duration != 0) {
iks_insert_attrib(dtmf, "action", "button-up");
}
ast_aji_send(client->connection, iq);
iks_delete(iq);
iks_delete(gtalk);
iks_delete(dtmf);
ast_mutex_unlock(&p->lock);
return 0;
}
#endif
static int gtalk_sendhtml(struct ast_channel *ast, int subclass, const char *data, int datalen)
{
ast_log(LOG_NOTICE, "XXX Implement gtalk sendhtml XXX\n");
return -1;
}
/*!\brief Initiate new call, part of PBX interface
* dest is the dial string */
static int gtalk_call(struct ast_channel *ast, char *dest, int timeout)
{
struct gtalk_pvt *p = ast->tech_pvt;
if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
ast_log(LOG_WARNING, "gtalk_call called on %s, neither down nor reserved\n", ast->name);
return -1;
}
ast_setstate(ast, AST_STATE_RING);
if (!p->ringrule) {
ast_copy_string(p->ring, p->parent->connection->mid, sizeof(p->ring));
p->ringrule = iks_filter_add_rule(p->parent->connection->f, gtalk_ringing_ack, p,
IKS_RULE_ID, p->ring, IKS_RULE_DONE);
} else {
ast_log(LOG_WARNING, "Whoa, already have a ring rule!\n");
}
gtalk_invite(p, p->them, p->us, p->sid, 1);
return 0;
}
/*! \brief Hangup a call through the gtalk proxy channel */
static int gtalk_hangup(struct ast_channel *ast)
{
struct gtalk_pvt *p = ast->tech_pvt;
struct gtalk *client;
ast_mutex_lock(&p->lock);
client = p->parent;
p->owner = NULL;
ast->tech_pvt = NULL;
if (!p->alreadygone) {
gtalk_action(client, p, "terminate");
}
ast_mutex_unlock(&p->lock);
gtalk_free_pvt(client, p);
ast_module_unref(ast_module_info->self);
return 0;
}
/*!\brief Part of PBX interface */
static struct ast_channel *gtalk_request(const char *type, format_t format, const struct ast_channel *requestor, void *data, int *cause)
{
struct gtalk_pvt *p = NULL;
struct gtalk *client = NULL;
char *sender = NULL, *to = NULL, *s = NULL;
struct ast_channel *chan = NULL;
if (data) {
s = ast_strdupa(data);
if (s) {
sender = strsep(&s, "/");
if (sender && (sender[0] != '\0')) {
to = strsep(&s, "/");
}
if (!to) {
ast_log(LOG_ERROR, "Bad arguments in Gtalk Dialstring: %s\n", (char*) data);
return NULL;
}
}
}
client = find_gtalk(to, sender);
if (!client) {
ast_log(LOG_WARNING, "Could not find recipient.\n");
return NULL;
}
if (!strcasecmp(client->name, "guest")){
/* the guest account is not tied to any configured XMPP client,
let's set it now */
client->connection = ast_aji_get_client(sender);
if (!client->connection) {
ast_log(LOG_ERROR, "No XMPP client to talk to, us (partial JID) : %s\n", sender);
ASTOBJ_UNREF(client, gtalk_member_destroy);
return NULL;
}
}
ASTOBJ_WRLOCK(client);
p = gtalk_alloc(client, strchr(sender, '@') ? sender : client->connection->jid->full, strchr(to, '@') ? to : client->user, NULL);
if (p) {
chan = gtalk_new(client, p, AST_STATE_DOWN, to, requestor ? requestor->linkedid : NULL);
}
ASTOBJ_UNLOCK(client);
return chan;
}
/*! \brief CLI command "gtalk show channels" */
static char *gtalk_show_channels(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
#define FORMAT "%-30.30s %-30.30s %-15.15s %-5.5s %-5.5s \n"
struct gtalk_pvt *p;
struct ast_channel *chan;
int numchans = 0;
char them[AJI_MAX_JIDLEN];
char *jid = NULL;
char *resource = NULL;
switch (cmd) {
case CLI_INIT:
e->command = "gtalk show channels";
e->usage =
"Usage: gtalk show channels\n"
" Shows current state of the Gtalk channels.\n";
return NULL;
case CLI_GENERATE:
return NULL;
}
if (a->argc != 3)
return CLI_SHOWUSAGE;
ast_mutex_lock(&gtalklock);
ast_cli(a->fd, FORMAT, "Channel", "Jabber ID", "Resource", "Read", "Write");
ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
ASTOBJ_WRLOCK(iterator);
p = iterator->p;
while(p) {
chan = p->owner;
ast_copy_string(them, p->them, sizeof(them));
jid = them;
resource = strchr(them, '/');
if (!resource)
resource = "None";
else {
*resource = '\0';
resource ++;
}
if (chan)
ast_cli(a->fd, FORMAT,
chan->name,
jid,
resource,
ast_getformatname(chan->readformat),
ast_getformatname(chan->writeformat)
);
else
ast_log(LOG_WARNING, "No available channel\n");
numchans ++;
p = p->next;
}
ASTOBJ_UNLOCK(iterator);
});
ast_mutex_unlock(&gtalklock);
ast_cli(a->fd, "%d active gtalk channel%s\n", numchans, (numchans != 1) ? "s" : "");
return CLI_SUCCESS;
#undef FORMAT
}
/*! \brief List global settings for the GoogleTalk channel */
static char *gtalk_show_settings(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
char codec_buf[BUFSIZ];
switch (cmd) {
case CLI_INIT:
e->command = "gtalk show settings";
e->usage =
"Usage: gtalk show settings\n"
" Provides detailed list of the configuration on the GoogleTalk channel.\n";
return NULL;
case CLI_GENERATE:
return NULL;
}
if (a->argc != 3) {
return CLI_SHOWUSAGE;
}
#define FORMAT " %-25.20s %-15.30s\n"
ast_cli(a->fd, "\nGlobal Settings:\n");
ast_cli(a->fd, "----------------\n");
ast_cli(a->fd, FORMAT, "UDP Bindaddress:", ast_inet_ntoa(bindaddr.sin_addr));
ast_cli(a->fd, FORMAT, "Stun Address:", global_stunaddr != 0 ? ast_inet_ntoa(stunaddr.sin_addr) : "Disabled");
ast_cli(a->fd, FORMAT, "External IP:", S_OR(externip, "Disabled"));
ast_cli(a->fd, FORMAT, "Context:", global_context);
ast_cli(a->fd, FORMAT, "Codecs:", ast_getformatname_multiple(codec_buf, sizeof(codec_buf) - 1, global_capability));
ast_cli(a->fd, FORMAT, "Parking Lot:", global_parkinglot);
ast_cli(a->fd, FORMAT, "Allow Guest:", AST_CLI_YESNO(global_allowguest));
ast_cli(a->fd, "\n----\n");
return CLI_SUCCESS;
#undef FORMAT
}
/*! \brief CLI command "gtalk reload"
* \todo XXX TODO make this work. */
#if 0
static char *gtalk_do_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
switch (cmd) {
case CLI_INIT:
e->command = "gtalk reload";
e->usage =
"Usage: gtalk reload\n"
" Reload gtalk channel driver.\n";
return NULL;
case CLI_GENERATE:
return NULL;
}
ast_verbose("IT DOES WORK!\n");
return CLI_SUCCESS;
}
#endif
static int gtalk_parser(void *data, ikspak *pak)
{
struct gtalk *client = ASTOBJ_REF((struct gtalk *) data);
int res;
if (!strcmp(S_OR(iks_find_attrib(pak->x, "type"), ""), "error")) {
ast_log(LOG_NOTICE, "Remote peer reported an error, trying to establish the call anyway\n");
}
if (ast_strlen_zero(iks_find_attrib(pak->query, "type"))) {
ast_log(LOG_NOTICE, "No attribute \"type\" found. Ignoring message.\n");
} else if (!strcmp(iks_find_attrib(pak->query, "type"), "initiate")) {
/* New call */
gtalk_newcall(client, pak);
} else if (!strcmp(iks_find_attrib(pak->query, "type"), "candidates") || !strcmp(iks_find_attrib(pak->query, "type"), "transport-info")) {
ast_debug(3, "About to add candidate!\n");
res = gtalk_add_candidate(client, pak);
if (!res) {
ast_log(LOG_WARNING, "Could not add any candidate\n");
} else {
ast_debug(3, "Candidate Added!\n");
}
} else if (!strcmp(iks_find_attrib(pak->query, "type"), "accept")) {
gtalk_is_answered(client, pak);
} else if (!strcmp(iks_find_attrib(pak->query, "type"), "transport-accept")) {
gtalk_is_accepted(client, pak);
} else if (!strcmp(iks_find_attrib(pak->query, "type"), "content-info") || iks_find_with_attrib(pak->x, "gtalk", "action", "session-info")) {
gtalk_handle_dtmf(client, pak);
} else if (!strcmp(iks_find_attrib(pak->query, "type"), "terminate")) {
gtalk_hangup_farend(client, pak);
} else if (!strcmp(iks_find_attrib(pak->query, "type"), "reject")) {
gtalk_hangup_farend(client, pak);
}
ASTOBJ_UNREF(client, gtalk_member_destroy);
return IKS_FILTER_EAT;
}
static int gtalk_create_member(char *label, struct ast_variable *var, int allowguest,
struct ast_codec_pref prefs, char *context,
struct gtalk *member)
{
struct aji_client *client;
if (!member)
ast_log(LOG_WARNING, "Out of memory.\n");
ast_copy_string(member->name, label, sizeof(member->name));
ast_copy_string(member->user, label, sizeof(member->user));
ast_copy_string(member->context, context, sizeof(member->context));
member->allowguest = allowguest;
member->prefs = prefs;
while (var) {
if (!strcasecmp(var->name, "username"))
ast_copy_string(member->user, var->value, sizeof(member->user));
else if (!strcasecmp(var->name, "disallow"))
ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 0);
else if (!strcasecmp(var->name, "allow"))
ast_parse_allow_disallow(&member->prefs, &member->capability, var->value, 1);
else if (!strcasecmp(var->name, "context"))
ast_copy_string(member->context, var->value, sizeof(member->context));
else if (!strcasecmp(var->name, "parkinglot"))
ast_copy_string(member->parkinglot, var->value, sizeof(member->parkinglot));
else if (!strcasecmp(var->name, "connection")) {
if ((client = ast_aji_get_client(var->value))) {
member->connection = client;
iks_filter_add_rule(client->f, gtalk_parser, member,
IKS_RULE_TYPE, IKS_PAK_IQ,
IKS_RULE_FROM_PARTIAL, member->user,
IKS_RULE_NS, GOOGLE_NS,
IKS_RULE_DONE);
} else {
ast_log(LOG_ERROR, "connection referenced not found!\n");
return 0;
}
}
var = var->next;
}
if (member->connection && member->user)
member->buddy = ASTOBJ_CONTAINER_FIND(&member->connection->buddies, member->user);
else {
ast_log(LOG_ERROR, "No Connection or Username!\n");
}
return 1;
}
static int gtalk_load_config(void)
{
char *cat = NULL;
struct ast_config *cfg = NULL;
struct ast_variable *var;
struct gtalk *member;
struct ast_codec_pref prefs;
struct aji_client_container *clients;
struct gtalk_candidate *global_candidates = NULL;
struct hostent *hp;
struct ast_hostent ahp;
struct ast_flags config_flags = { 0 };
cfg = ast_config_load(GOOGLE_CONFIG, config_flags);
if (!cfg) {
return 0;
} else if (cfg == CONFIG_STATUS_FILEINVALID) {
ast_log(LOG_ERROR, "Config file %s is in an invalid format. Aborting.\n", GOOGLE_CONFIG);
return 0;
}
/* Copy the default jb config over global_jbconf */
memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
/* set defaults */
memset(&stunaddr, 0, sizeof(stunaddr));
global_stunaddr = 0;
global_allowguest = DEFAULT_ALLOWGUEST;
ast_copy_string(global_context, DEFAULT_CONTEXT, sizeof(global_context));
ast_copy_string(global_parkinglot, DEFAULT_PARKINGLOT, sizeof(global_parkinglot));
cat = ast_category_browse(cfg, NULL);
for (var = ast_variable_browse(cfg, "general"); var; var = var->next) {
/* handle jb conf */
if (!ast_jb_read_conf(&global_jbconf, var->name, var->value)) {
continue;
}
if (!strcasecmp(var->name, "allowguest")) {
global_allowguest = (ast_true(ast_variable_retrieve(cfg, "general", "allowguest"))) ? 1 : 0;
} else if (!strcasecmp(var->name, "disallow")) {
ast_parse_allow_disallow(&prefs, &global_capability, var->value, 0);
} else if (!strcasecmp(var->name, "allow")) {
ast_parse_allow_disallow(&prefs, &global_capability, var->value, 1);
} else if (!strcasecmp(var->name, "context")) {
ast_copy_string(global_context, var->value, sizeof(global_context));
} else if (!strcasecmp(var->name, "externip")) {
ast_copy_string(externip, var->value, sizeof(externip));
} else if (!strcasecmp(var->name, "parkinglot")) {
ast_copy_string(global_parkinglot, var->value, sizeof(global_parkinglot));
} else if (!strcasecmp(var->name, "bindaddr")) {
if (!(hp = ast_gethostbyname(var->value, &ahp))) {
ast_log(LOG_WARNING, "Invalid address: %s\n", var->value);
} else {
memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr));
}
} else if (!strcasecmp(var->name, "stunaddr")) {
stunaddr.sin_port = htons(STANDARD_STUN_PORT);
global_stunaddr = 1;
if (ast_parse_arg(var->value, PARSE_INADDR, &stunaddr)) {
ast_log(LOG_WARNING, "Invalid STUN server address: %s\n", var->value);
}
}
}
while (cat) {
if (strcasecmp(cat, "general")) {
var = ast_variable_browse(cfg, cat);
member = ast_calloc(1, sizeof(*member));
ASTOBJ_INIT(member);
ASTOBJ_WRLOCK(member);
if (!strcasecmp(cat, "guest")) {
ast_copy_string(member->name, "guest", sizeof(member->name));
ast_copy_string(member->user, "guest", sizeof(member->user));
ast_copy_string(member->context, global_context, sizeof(member->context));
ast_copy_string(member->parkinglot, global_parkinglot, sizeof(member->parkinglot));
member->allowguest = global_allowguest;
member->prefs = prefs;
while (var) {
if (!strcasecmp(var->name, "disallow")) {
ast_parse_allow_disallow(&member->prefs, &member->capability,
var->value, 0);
} else if (!strcasecmp(var->name, "allow")) {
ast_parse_allow_disallow(&member->prefs, &member->capability,
var->value, 1);
} else if (!strcasecmp(var->name, "context")) {
ast_copy_string(member->context, var->value,
sizeof(member->context));
} else if (!strcasecmp(var->name, "parkinglot")) {
ast_copy_string(member->parkinglot, var->value,
sizeof(member->parkinglot));
}
var = var->next;
}
ASTOBJ_UNLOCK(member);
clients = ast_aji_get_clients();
if (clients) {
ASTOBJ_CONTAINER_TRAVERSE(clients, 1, {
ASTOBJ_WRLOCK(iterator);
ASTOBJ_WRLOCK(member);
member->connection = NULL;
iks_filter_add_rule(iterator->f, gtalk_parser, member, IKS_RULE_TYPE, IKS_PAK_IQ, IKS_RULE_NS, GOOGLE_NS, IKS_RULE_DONE);
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);
ASTOBJ_UNLOCK(member);
ASTOBJ_UNLOCK(iterator);
});
ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
ASTOBJ_UNREF(member, gtalk_member_destroy);
} else {
ASTOBJ_UNLOCK(member);
ASTOBJ_UNREF(member, gtalk_member_destroy);
}
} else {
ASTOBJ_UNLOCK(member);
if (gtalk_create_member(cat, var, global_allowguest, prefs, global_context, member)) {
ASTOBJ_CONTAINER_LINK(&gtalk_list, member);
}
ASTOBJ_UNREF(member, gtalk_member_destroy);
}
}
cat = ast_category_browse(cfg, cat);
}
gtalk_update_externip();
gtalk_free_candidates(global_candidates);
return 1;
}
/*! \brief Load module into PBX, register channel */
static int load_module(void)
{
struct ast_sockaddr bindaddr_tmp;
struct ast_sockaddr ourip_tmp;
char *jabber_loaded = ast_module_helper("", "res_jabber.so", 0, 0, 0, 0);
free(jabber_loaded);
if (!jabber_loaded) {
/* If embedded, check for a different module name */
jabber_loaded = ast_module_helper("", "res_jabber", 0, 0, 0, 0);
free(jabber_loaded);
if (!jabber_loaded) {
ast_log(LOG_ERROR, "chan_gtalk.so depends upon res_jabber.so\n");
return AST_MODULE_LOAD_DECLINE;
}
}
ASTOBJ_CONTAINER_INIT(&gtalk_list);
if (!gtalk_load_config()) {
ast_log(LOG_ERROR, "Unable to read config file %s. Not loading module.\n", GOOGLE_CONFIG);
return 0;
}
sched = ast_sched_context_create();
if (!sched) {
ast_log(LOG_WARNING, "Unable to create schedule context\n");
}
io = io_context_create();
if (!io) {
ast_log(LOG_WARNING, "Unable to create I/O context\n");
}
ast_sockaddr_from_sin(&bindaddr_tmp, &bindaddr);
if (gtalk_get_local_ip(&ourip_tmp)) {
ast_log(LOG_WARNING, "Unable to get own IP address, Gtalk disabled\n");
return 0;
}
__ourip.s_addr = htonl(ast_sockaddr_ipv4(&ourip_tmp));
ast_rtp_glue_register(&gtalk_rtp_glue);
ast_cli_register_multiple(gtalk_cli, ARRAY_LEN(gtalk_cli));
/* Make sure we can register our channel type */
if (ast_channel_register(&gtalk_tech)) {
ast_log(LOG_ERROR, "Unable to register channel class %s\n", gtalk_tech.type);
return -1;
}
return 0;
}
/*! \brief Reload module
* \todo XXX TODO make this work. */
#if 0
static int reload(void)
{
return 0;
}
#endif
/*! \brief Unload the gtalk channel from Asterisk */
static int unload_module(void)
{
struct gtalk_pvt *privates = NULL;
ast_cli_unregister_multiple(gtalk_cli, ARRAY_LEN(gtalk_cli));
/* First, take us out of the channel loop */
ast_channel_unregister(&gtalk_tech);
ast_rtp_glue_unregister(&gtalk_rtp_glue);
if (!ast_mutex_lock(&gtalklock)) {
/* Hangup all interfaces if they have an owner */
ASTOBJ_CONTAINER_TRAVERSE(&gtalk_list, 1, {
ASTOBJ_WRLOCK(iterator);
privates = iterator->p;
while(privates) {
if (privates->owner)
ast_softhangup(privates->owner, AST_SOFTHANGUP_APPUNLOAD);
privates = privates->next;
}
iterator->p = NULL;
ASTOBJ_UNLOCK(iterator);
});
ast_mutex_unlock(&gtalklock);
} else {
ast_log(LOG_WARNING, "Unable to lock the monitor\n");
return -1;
}
ASTOBJ_CONTAINER_DESTROYALL(&gtalk_list, gtalk_member_destroy);
ASTOBJ_CONTAINER_DESTROY(&gtalk_list);
return 0;
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Gtalk Channel Driver",
.load = load_module,
.unload = unload_module,
/* .reload = reload, */
.load_pri = AST_MODPRI_CHANNEL_DRIVER,
);
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