diff options
Diffstat (limited to 'trunk/channels/chan_gtalk.c')
| -rw-r--r-- | trunk/channels/chan_gtalk.c | 1956 |
1 files changed, 1956 insertions, 0 deletions
diff --git a/trunk/channels/chan_gtalk.c b/trunk/channels/chan_gtalk.c new file mode 100644 index 000000000..05e7de704 --- /dev/null +++ b/trunk/channels/chan_gtalk.c @@ -0,0 +1,1956 @@ +/* + * Asterisk -- An open source telephony toolkit. + * + * Copyright (C) 1999 - 2005, Digium, Inc. + * + * Matt O'Gorman <mogorman@digium.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> + * + * \brief Gtalk Channel Driver, until google/libjingle works with jingle spec + * + * \ingroup channel_drivers + */ + +/*** 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 "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.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" + +#define GOOGLE_CONFIG "gtalk.conf" + +#define GOOGLE_NS "http://www.google.com/session" + + +/*! Global jitterbuffer configuration - by default, jb is disabled */ +static struct ast_jb_conf default_jbconf = +{ + .flags = 0, + .max_size = -1, + .resync_threshold = -1, + .impl = "" +}; +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 *rtp; /*!< RTP audio session */ + struct ast_rtp *vrtp; /*!< RTP video session */ + int jointcapability; /*!< Supported capability at both ends (codecs ) */ + int 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 accountcode[AST_MAX_ACCOUNT_CODE]; /*!< Account code */ + int 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 int 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, int format, void *data, int *cause); +static int gtalk_digit(struct ast_channel *ast, char digit, unsigned int duration); +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_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 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); +/*----- RTP interface functions */ +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); +static enum ast_rtp_get_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp); +static int gtalk_get_codec(struct ast_channel *chan); + +/*! \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_digit_begin = gtalk_digit_begin, + .send_digit_end = gtalk_digit_end, + .bridge = ast_rtp_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 sched_context *sched; /*!< The scheduling context */ +static struct io_context *io; /*!< The IO context */ +static struct in_addr __ourip; + +/*! \brief RTP driver interface */ +static struct ast_rtp_protocol gtalk_rtp = { + type: "Gtalk", + get_rtp_info: gtalk_get_rtp_peer, + set_rtp_peer: gtalk_set_rtp_peer, + get_codec: gtalk_get_codec, +}; + +static struct ast_cli_entry gtalk_cli[] = { + AST_CLI_DEFINE(gtalk_do_reload, "Reload GoogleTalk configuration"), + AST_CLI_DEFINE(gtalk_show_channels, "Show GoogleTalk channels"), +}; + +static char externip[16]; + +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(>alk_list, name); + if (!gtalk && strchr(name, '@')) + gtalk = ASTOBJ_CONTAINER_FIND_FULL(>alk_list, name, user,,, strcasecmp); + + if (!gtalk) { /* guest call */ + ASTOBJ_CONTAINER_TRAVERSE(>alk_list, 1, { + ASTOBJ_RDLOCK(iterator); + if (!strcasecmp(iterator->name, "guest")) { + if (!strcasecmp(iterator->connection->jid->partial, connection)) { + gtalk = iterator; + } else if (!strcasecmp(iterator->connection->name, connection)) { + gtalk = iterator; + } else if (iterator->connection->component && !strcasecmp(iterator->connection->user,domain)) { + 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) +{ + 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) { + if(payload_pcmu) + iks_delete(payload_pcmu); + if(payload_eg711u) + 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); + } + 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) { + if(payload_eg711a) + iks_delete(payload_eg711a); + if(payload_pcma) + 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); + } + 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); + } + 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); + } + 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); + } + ast_rtp_lookup_code(p->rtp, 1, codec); + return 0; +} + +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; + + + 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)){ + if(iq) + iks_delete(iq); + if(gtalk) + iks_delete(gtalk); + if(dcodecs) + iks_delete(dcodecs); + if(transport) + iks_delete(transport); + if(payload_telephone) + iks_delete(payload_telephone); + + ast_log(LOG_ERROR, "Could not allocate iksemel nodes\n"); + return 0; + } + iks_insert_attrib(dcodecs, "xmlns", "http://www.google.com/session/phone"); + iks_insert_attrib(dcodecs, "xml:lang", "en"); + + for (x = 0; x < 32; x++) { + if (!(pref_codec = ast_codec_pref_index(&client->prefs, x))) + break; + if (!(client->capability & pref_codec)) + continue; + if (alreadysent & pref_codec) + continue; + add_codec_to_answer(p, pref_codec, dcodecs); + alreadysent |= pref_codec; + } + + iks_insert_attrib(payload_telephone, "id", "106"); + iks_insert_attrib(payload_telephone, "name", "telephone-event"); + iks_insert_attrib(payload_telephone, "clockrate", "8000"); + + iks_insert_attrib(transport,"xmlns","http://www.google.com/transport/p2p"); + + 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", "http://www.google.com/session"); + iks_insert_attrib(gtalk, "type",initiator ? "initiate": "accept"); + iks_insert_attrib(gtalk, "initiator", initiator ? from : to); + iks_insert_attrib(gtalk, "id", sid); + iks_insert_node(iq, gtalk); + iks_insert_node(gtalk, dcodecs); + iks_insert_node(gtalk, transport); + 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_invite_response(struct gtalk_pvt *p, char *to , char *from, char *sid, int initiator) +{ + iks *iq, *session, *transport; + iq = iks_new("iq"); + session = iks_new("session"); + transport = iks_new("transport"); + if(!(iq && session && transport)) { + if(iq) + iks_delete(iq); + if(session) + iks_delete(session); + if(transport) + iks_delete(transport); + ast_log(LOG_ERROR, " Unable to allocate IKS node\n"); + return -1; + } + iks_insert_attrib(iq, "from", from); + iks_insert_attrib(iq, "to", to); + iks_insert_attrib(iq, "type", "set"); + iks_insert_attrib(iq, "id",p->parent->connection->mid); + ast_aji_increment_mid(p->parent->connection->mid); + iks_insert_attrib(session, "type", "transport-accept"); + iks_insert_attrib(session, "id", sid); + iks_insert_attrib(session, "initiator", initiator ? from : to); + iks_insert_attrib(session, "xmlns", "http://www.google.com/session"); + iks_insert_attrib(transport, "xmlns", "http://www.google.com/transport/p2p"); + iks_insert_node(iq,session); + iks_insert_node(session,transport); + ast_aji_send(p->parent->connection, iq); + iks_delete(transport); + iks_delete(session); + iks_delete(iq); + return 1; + +} + +static int gtalk_ringing_ack(void *data, ikspak *pak) +{ + struct gtalk_pvt *p = data; + + if (p->ringrule) + iks_filter_remove_rule(p->parent->connection->f, p->ringrule); + p->ringrule = NULL; + if (p->owner) + ast_queue_control(p->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_get_result gtalk_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp) +{ + struct gtalk_pvt *p = chan->tech_pvt; + enum ast_rtp_get_result res = AST_RTP_GET_FAILED; + + if (!p) + return res; + + ast_mutex_lock(&p->lock); + if (p->rtp){ + *rtp = p->rtp; + res = AST_RTP_TRY_PARTIAL; + } + ast_mutex_unlock(&p->lock); + + return res; +} + +static int 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 *rtp, struct ast_rtp *vrtp, struct ast_rtp *trtp, int 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 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", iks_find_attrib(pak->x, "from")); + iks_insert_attrib(response, "id", 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); + if (reason) + iks_delete(reason); + if (error) + iks_delete(error); + iks_delete(response); + res = 0; + } + return res; +} + +static int gtalk_is_answered(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)) + break; + } + + from = iks_find_attrib(pak->x, "to"); + if(!from) + from = client->connection->jid->full; + + if (tmp) { + if (tmp->owner) + ast_queue_control(tmp->owner, AST_CONTROL_ANSWER); + } else + ast_log(LOG_NOTICE, "Whoa, didn't find call!\n"); + 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) + ast_log(LOG_NOTICE, "Whoa, didn't find call!\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 = dtmf[0]; + ast_queue_frame(tmp->owner, &f); + ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass); + } else if(iks_find_with_attrib(pak->x, "dtmf", "action", "button-down")) { + struct ast_frame f = {AST_FRAME_DTMF_END, }; + f.subclass = dtmf[0]; + ast_queue_frame(tmp->owner, &f); + ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass); + } else if(iks_find_attrib(pak->x, "dtmf")) { /* 250 millasecond default */ + struct ast_frame f = {AST_FRAME_DTMF, }; + f.subclass = dtmf[0]; + ast_queue_frame(tmp->owner, &f); + ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass); + } + } + } 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 = dtmf[0]; + ast_queue_frame(tmp->owner, &f); + ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass); + } else if(iks_find_with_attrib(dtmfnode, "dtmf", "action", "button-down")) { + struct ast_frame f = {AST_FRAME_DTMF_BEGIN, }; + f.subclass = dtmf[0]; + ast_queue_frame(tmp->owner, &f); + ast_verbose("GOOGLE! DTMF-relay event received: %c\n", f.subclass); + } + } + } + } + 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)) + 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!\n"); + gtalk_response(client, from, pak, NULL, NULL); + return 1; +} + +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; + struct sockaddr_in dest; + struct in_addr us; + iks *iq, *gtalk, *candidate, *transport; + char user[17], pass[17], preference[5], port[7]; + + + 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","http://www.google.com/transport/p2p"); + iks_insert_node(iq, gtalk); + iks_insert_node(gtalk,transport); + iks_insert_node(transport, candidate); + + 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_get_us(p->rtp, &sin); + ast_find_ourip(&us, bindaddr); + + /* 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_inet_ntoa(us), sizeof(ours1->ip)); + ours1->protocol = AJI_PROTOCOL_UDP; + ours1->type = AJI_CONNECT_LOCAL; + ours1->generation = 0; + p->ourcandidates = ours1; + + if (!ast_strlen_zero(externip)) { + /* XXX We should really stun for this one not just go with externip XXX */ + snprintf(user, sizeof(user), "%08lx%08lx", ast_random(), ast_random()); + snprintf(pass, sizeof(pass), "%08lx%08lx", ast_random(), ast_random()); + 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; + dest.sin_addr = __ourip; + dest.sin_port = sin.sin_port; + + + 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", "transport-info"); + iks_insert_attrib(gtalk, "id", sid); + iks_insert_attrib(gtalk, "initiator", (p->initiator) ? to : from); + 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); + if (iq) + iks_delete(iq); + if (gtalk) + iks_delete(gtalk); + if (candidate) + iks_delete(candidate); + if(transport) + 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; + + 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 { + 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; + } + tmp->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, bindaddr.sin_addr); + 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(>alklock); + tmp->next = client->p; + client->p = tmp; + ast_mutex_unlock(>alklock); + 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) +{ + 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, 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 = >alk_tech; + + /* Select our native format based on codec preference until we receive + something from another device to the contrary. */ +/* ast_verbose("XXXXXXXXXXXXX\nXXX i->jointcapability = %X\nXXX i->capability = %X\nXXX global_capability %X\n XXXXXXXXXXXX\n",i->jointcapability,i->capability,global_capability); */ + 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_codec_setpref(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_rtp_setstun(i->rtp, 1); + ast_channel_set_fd(tmp, 0, ast_rtp_fd(i->rtp)); + ast_channel_set_fd(tmp, 1, ast_rtcp_fd(i->rtp)); + } + if (i->vrtp) { + ast_rtp_setstun(i->rtp, 1); + ast_channel_set_fd(tmp, 2, ast_rtp_fd(i->vrtp)); + ast_channel_set_fd(tmp, 3, ast_rtcp_fd(i->vrtp)); + } + 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->cid.cid_pres = 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); + 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->cid.cid_dnid = 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; + + 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); + iks_insert_attrib(session, "initiator", p->initiator ? p->us : p->them); + iks_insert_attrib(session, "xmlns", "http://www.google.com/session"); + iks_insert_node(request, session); + ast_aji_send(client->connection, request); + iks_delete(session); + res = 0; + } + 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_destroy(p->rtp); + if (p->vrtp) + ast_rtp_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; + /* 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)) { + 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; + } + + p = gtalk_alloc(client, from, pak->from->full, iks_find_attrib(pak->query, "id")); + 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); + if (chan) { + ast_mutex_lock(&p->lock); + ast_copy_string(p->them, pak->from->full, sizeof(p->them)); + if (iks_find_attrib(pak->query, "id")) { + ast_copy_string(p->sid, iks_find_attrib(pak->query, "id"), + sizeof(p->sid)); + } + + codec = iks_child(iks_child(iks_child(pak->x))); + while (codec) { + ast_rtp_set_m_type(p->rtp, atoi(iks_find_attrib(codec, "id"))); + ast_rtp_set_rtpmap_type(p->rtp, atoi(iks_find_attrib(codec, "id")), "audio", + iks_find_attrib(codec, "name"), 0); + codec = iks_next(codec); + } + + ast_mutex_unlock(&p->lock); + ast_setstate(chan, AST_STATE_RING); + 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_invite_response(p, p->them, p->us,p->sid, 0); + gtalk_create_candidates(client, p, p->sid, p->them, p->us); + /* nothing to do */ + break; + } + } else { + gtalk_free_pvt(client, p); + } + return 1; +} + +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; + struct sockaddr_in aux; + + 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 */ + hp = ast_gethostbyname(tmp->ip, &ahp); + 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_get_peer(p->rtp, &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_stun_request(p->rtp, &aux, username); + else + ast_rtp_stun_request(p->rtp, &sin, 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)) { + p = tmp; + break; + } + } + + if (!p) + return -1; + + traversenodes = pak->query; + while(traversenodes) { + if(!strcasecmp(iks_name(traversenodes), "session")) { + traversenodes = iks_child(traversenodes); + continue; + } + if(!strcasecmp(iks_name(traversenodes), "transport")) { + traversenodes = iks_child(traversenodes); + continue; + } + if(!strcasecmp(iks_name(traversenodes), "candidate")) { + newcandidate = ast_calloc(1, sizeof(*newcandidate)); + if (!newcandidate) + return 0; + ast_copy_string(newcandidate->name, iks_find_attrib(traversenodes, "name"), + sizeof(newcandidate->name)); + ast_copy_string(newcandidate->ip, iks_find_attrib(traversenodes, "address"), + sizeof(newcandidate->ip)); + newcandidate->port = atoi(iks_find_attrib(traversenodes, "port")); + ast_copy_string(newcandidate->username, iks_find_attrib(traversenodes, "username"), + sizeof(newcandidate->username)); + ast_copy_string(newcandidate->password, iks_find_attrib(traversenodes, "password"), + sizeof(newcandidate->password)); + newcandidate->preference = atof(iks_find_attrib(traversenodes, "preference")); + if (!strcasecmp(iks_find_attrib(traversenodes, "protocol"), "udp")) + newcandidate->protocol = AJI_PROTOCOL_UDP; + if (!strcasecmp(iks_find_attrib(traversenodes, "protocol"), "ssltcp")) + newcandidate->protocol = AJI_PROTOCOL_SSLTCP; + + if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "stun")) + newcandidate->type = AJI_CONNECT_STUN; + if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "local")) + newcandidate->type = AJI_CONNECT_LOCAL; + if (!strcasecmp(iks_find_attrib(traversenodes, "type"), "relay")) + newcandidate->type = AJI_CONNECT_RELAY; + ast_copy_string(newcandidate->network, iks_find_attrib(traversenodes, "network"), + sizeof(newcandidate->network)); + newcandidate->generation = atoi(iks_find_attrib(traversenodes, "generation")); + newcandidate->next = NULL; + + newcandidate->next = p->theircandidates; + p->theircandidates = newcandidate; + p->laststun = 0; + gtalk_update_stun(p->parent, p); + newcandidate = NULL; + } + traversenodes = iks_next(traversenodes); + } + + receipt = iks_new("iq"); + iks_insert_attrib(receipt, "type", "result"); + iks_insert_attrib(receipt, "from", from); + iks_insert_attrib(receipt, "to", iks_find_attrib(pak->x, "from")); + iks_insert_attrib(receipt, "id", 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_read(p->rtp); + gtalk_update_stun(p->parent, p); + if (p->owner) { + /* We already hold the channel lock */ + if (f->frametype == AST_FRAME_VOICE) { + if (f->subclass != (p->owner->nativeformats & AST_FORMAT_AUDIO_MASK)) { + ast_debug(1, "Oooh, format changed to %d\n", f->subclass); + p->owner->nativeformats = + (p->owner->nativeformats & AST_FORMAT_VIDEO_MASK) | f->subclass; + 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; + + switch (frame->frametype) { + case AST_FRAME_VOICE: + if (!(frame->subclass & ast->nativeformats)) { + ast_log(LOG_WARNING, + "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n", + frame->subclass, ast->nativeformats, ast->readformat, + ast->writeformat); + return 0; + } + if (p) { + ast_mutex_lock(&p->lock); + if (p->rtp) { + res = ast_rtp_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_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_log(LOG_NOTICE, "Don't know how to indicate condition '%d'\n", condition); + res = -1; + } + + return res; +} + +static int gtalk_digit_begin(struct ast_channel *chan, char digit) +{ + return gtalk_digit(chan, digit, 0); +} + +static int gtalk_digit_end(struct ast_channel *chan, char digit, unsigned int duration) +{ + return gtalk_digit(chan, digit, duration); +} + +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'}; + iq = iks_new("iq"); + gtalk = iks_new("gtalk"); + dtmf = iks_new("dtmf"); + if(!iq || !gtalk || !dtmf) { + if(iq) + iks_delete(iq); + if(gtalk) + iks_delete(gtalk); + if(dtmf) + 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"); + iks_insert_attrib(gtalk, "initiator", p->initiator ? p->us: p->them); + 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; +} + +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; +} + +/* Not in use right now. +static int gtalk_auto_congest(void *nothing) +{ + struct gtalk_pvt *p = nothing; + + ast_mutex_lock(&p->lock); + if (p->owner) { + if (!ast_channel_trylock(p->owner)) { + ast_log(LOG_NOTICE, "Auto-congesting %s\n", p->owner->name); + ast_queue_control(p->owner, AST_CONTROL_CONGESTION); + ast_channel_unlock(p->owner); + } + } + ast_mutex_unlock(&p->lock); + return 0; +} +*/ + +/*! \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); + p->jointcapability = p->capability; + 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); + gtalk_create_candidates(p->parent, p, p->sid, p->them, p->us); + + 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, int format, 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; + } + 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); + + 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(>alklock); + ast_cli(a->fd, FORMAT, "Channel", "Jabber ID", "Resource", "Read", "Write"); + ASTOBJ_CONTAINER_TRAVERSE(>alk_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(>alklock); + + ast_cli(a->fd, "%d active gtalk channel%s\n", numchans, (numchans != 1) ? "s" : ""); + return CLI_SUCCESS; +#undef FORMAT +} + +/*! \brief CLI command "gtalk reload" */ +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; +} + +static int gtalk_parser(void *data, ikspak *pak) +{ + struct gtalk *client = ASTOBJ_REF((struct gtalk *) data); + + if (iks_find_with_attrib(pak->x, "session", "type", "initiate")) { + /* New call */ + gtalk_newcall(client, pak); + } else if (iks_find_with_attrib(pak->x, "session", "type", "candidates") || iks_find_with_attrib(pak->x, "session", "type", "transport-info")) { + ast_debug(3, "About to add candidate!\n"); + gtalk_add_candidate(client, pak); + ast_debug(3, "Candidate Added!\n"); + } else if (iks_find_with_attrib(pak->x, "session", "type", "accept")) { + gtalk_is_answered(client, pak); + } else if (iks_find_with_attrib(pak->x, "session", "type", "transport-accept")) { + gtalk_is_accepted(client, pak); + } else if (iks_find_with_attrib(pak->x, "session", "type", "content-info") || iks_find_with_attrib(pak->x, "gtalk", "action", "session-info")) { + gtalk_handle_dtmf(client, pak); + } else if (iks_find_with_attrib(pak->x, "session", "type", "terminate")) { + gtalk_hangup_farend(client, pak); + } else if (iks_find_with_attrib(pak->x, "session", "type", "reject")) { + gtalk_hangup_farend(client, pak); + } + ASTOBJ_UNREF(client, gtalk_member_destroy); + return IKS_FILTER_EAT; +} + +/* Not using this anymore probably take out soon +static struct gtalk_candidate *gtalk_create_candidate(char *args) +{ + char *name, *type, *preference, *protocol; + struct gtalk_candidate *res; + res = ast_calloc(1, sizeof(*res)); + if (args) + name = args; + if ((args = strchr(args, ','))) { + *args = '\0'; + args++; + preference = args; + } + if ((args = strchr(args, ','))) { + *args = '\0'; + args++; + protocol = args; + } + if ((args = strchr(args, ','))) { + *args = '\0'; + args++; + type = args; + } + if (name) + ast_copy_string(res->name, name, sizeof(res->name)); + if (preference) { + res->preference = atof(preference); + } + if (protocol) { + if (!strcasecmp("udp", protocol)) + res->protocol = AJI_PROTOCOL_UDP; + if (!strcasecmp("ssltcp", protocol)) + res->protocol = AJI_PROTOCOL_SSLTCP; + } + if (type) { + if (!strcasecmp("stun", type)) + res->type = AJI_CONNECT_STUN; + if (!strcasecmp("local", type)) + res->type = AJI_CONNECT_LOCAL; + if (!strcasecmp("relay", type)) + res->type = AJI_CONNECT_RELAY; + } + + return res; +} +*/ + +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 0 + struct gtalk_candidate *candidate = NULL; +#endif + 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)); +#if 0 + else if (!strcasecmp(var->name, "candidate")) { + candidate = gtalk_create_candidate(var->value); + if (candidate) { + candidate->next = member->ourcandidates; + member->ourcandidates = candidate; + } + } +#endif + 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, "http://www.google.com/session", + 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; + char context[AST_MAX_CONTEXT]; + int allowguest = 1; + 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; + + /* Copy the default jb config over global_jbconf */ + memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf)); + + 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")) + 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(context, var->value, sizeof(context)); + 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)); + } + } +/* Idea to allow for custom candidates */ +/* + else if (!strcasecmp(var->name, "candidate")) { + candidate = gtalk_create_candidate(var->value); + if (candidate) { + candidate->next = global_candidates; + global_candidates = candidate; + } + } +*/ + } + 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, context, sizeof(member->context)); + member->allowguest = 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)); +/* Idea to allow for custom candidates */ +/* + else if (!strcasecmp(var->name, "candidate")) { + candidate = gtalk_create_candidate(var->value); + if (candidate) { + candidate->next = member->ourcandidates; + member->ourcandidates = candidate; + } + } +*/ + 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 = iterator; + 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); + 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_CONTAINER_LINK(>alk_list, member); + ASTOBJ_UNLOCK(iterator); + }); + } else { + ASTOBJ_UNLOCK(member); + ASTOBJ_UNREF(member, gtalk_member_destroy); + } + } else { + ASTOBJ_UNLOCK(member); + if (gtalk_create_member(cat, var, allowguest, prefs, context, member)) + ASTOBJ_CONTAINER_LINK(>alk_list, member); + ASTOBJ_UNREF(member, gtalk_member_destroy); + } + } + cat = ast_category_browse(cfg, cat); + } + gtalk_free_candidates(global_candidates); + return 1; +} + +/*! \brief Load module into PBX, register channel */ +static int load_module(void) +{ + ASTOBJ_CONTAINER_INIT(>alk_list); + if (!gtalk_load_config()) { + ast_log(LOG_ERROR, "Unable to read config file %s. Not loading module.\n", GOOGLE_CONFIG); + return 0; + } + + sched = 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"); + + if (ast_find_ourip(&__ourip, bindaddr)) { + ast_log(LOG_WARNING, "Unable to get own IP address, Gtalk disabled\n"); + return 0; + } + + ast_rtp_proto_register(>alk_rtp); + ast_cli_register_multiple(gtalk_cli, sizeof(gtalk_cli) / sizeof(gtalk_cli[0])); + + /* Make sure we can register our channel type */ + if (ast_channel_register(>alk_tech)) { + ast_log(LOG_ERROR, "Unable to register channel class %s\n", gtalk_tech.type); + return -1; + } + return 0; +} + +/*! \brief Reload module */ +static int reload(void) +{ + return 0; +} + +/*! \brief Unload the gtalk channel from Asterisk */ +static int unload_module(void) +{ + struct gtalk_pvt *privates = NULL; + ast_cli_unregister_multiple(gtalk_cli, sizeof(gtalk_cli) / sizeof(gtalk_cli[0])); + /* First, take us out of the channel loop */ + ast_channel_unregister(>alk_tech); + ast_rtp_proto_unregister(>alk_rtp); + + if (!ast_mutex_lock(>alklock)) { + /* Hangup all interfaces if they have an owner */ + ASTOBJ_CONTAINER_TRAVERSE(>alk_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(>alklock); + } else { + ast_log(LOG_WARNING, "Unable to lock the monitor\n"); + return -1; + } + ASTOBJ_CONTAINER_DESTROYALL(>alk_list, gtalk_member_destroy); + ASTOBJ_CONTAINER_DESTROY(>alk_list); + return 0; +} + +AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Gtalk Channel Driver", + .load = load_module, + .unload = unload_module, + .reload = reload, + ); |