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mod_janus.c
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/*
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
* Copyright (C) 2005-2014, Anthony Minessale II <[email protected]>
*
* Version: MPL 1.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
*
* The Initial Developer of the Original Code is
* Anthony Minessale II <[email protected]>
* Portions created by the Initial Developer are Copyright (C)
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Anthony Minessale II <[email protected]>
* Richard Screene <[email protected]>
*
*
* mod_janus.c -- janus Endpoint Module
*
* Implements interface between FreeSWITCH and Janus audiobridge
* (https://github.com/meetecho/janus-gateway)
*/
#include "switch.h"
#include "switch_curl.h"
#include "globals.h"
#include "http.h"
#include "servers.h"
#include "api.h"
#include "hash.h"
SWITCH_MODULE_LOAD_FUNCTION(mod_janus_load);
SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_janus_shutdown);
//SWITCH_MODULE_RUNTIME_FUNCTION(mod_janus_runtime);
SWITCH_MODULE_DEFINITION(mod_janus, mod_janus_load, mod_janus_shutdown, NULL); //mod_janus_runtime);
switch_endpoint_interface_t *janus_endpoint_interface;
typedef enum {
TFLAG_IO = (1 << 0),
TFLAG_INBOUND = (1 << 1),
TFLAG_OUTBOUND = (1 << 2),
TFLAG_DTMF = (1 << 3),
TFLAG_VOICE = (1 << 4),
TFLAG_HANGUP = (1 << 5),
TFLAG_LINEAR = (1 << 6),
TFLAG_CODEC = (1 << 7),
TFLAG_BREAK = (1 << 8)
} TFLAGS;
struct private_object {
unsigned int flags;
switch_codec_t read_codec;
switch_codec_t write_codec;
switch_frame_t read_frame;
unsigned char databuf[SWITCH_RECOMMENDED_BUFFER_SIZE];
switch_caller_profile_t *caller_profile;
switch_mutex_t *mutex;
switch_mutex_t *flag_mutex;
//switch_thread_cond_t *cond;
switch_media_handle_t *smh;
switch_core_media_params_t mparams;
janus_id_t serverId;
janus_id_t roomId;
char *pDisplay;
janus_id_t senderId;
};
typedef struct private_object private_t;
#define JANUS_SYNTAX "janus [debug|status|listgw]"
#define JANUS_DEBUG_SYNTAX "janus debug [true|false]"
#define JANUS_GATEWAY_SYNTAX "janus server <name> [enable|disable]"
SWITCH_STANDARD_API(janus_api_commands);
static switch_status_t channel_on_init(switch_core_session_t *session);
static switch_status_t channel_on_hangup(switch_core_session_t *session);
static switch_status_t channel_on_destroy(switch_core_session_t *session);
static switch_status_t channel_on_routing(switch_core_session_t *session);
static switch_status_t channel_on_exchange_media(switch_core_session_t *session);
static switch_status_t channel_on_soft_execute(switch_core_session_t *session);
static switch_call_cause_t channel_outgoing_channel(switch_core_session_t *session, switch_event_t *var_event,
switch_caller_profile_t *outbound_profile,
switch_core_session_t **new_session, switch_memory_pool_t **pool, switch_originate_flag_t flags,
switch_call_cause_t *cancel_cause);
static switch_status_t channel_read_frame(switch_core_session_t *session, switch_frame_t **frame, switch_io_flag_t flags, int stream_id);
static switch_status_t channel_write_frame(switch_core_session_t *session, switch_frame_t *frame, switch_io_flag_t flags, int stream_id);
static switch_status_t channel_kill_channel(switch_core_session_t *session, int sig);
switch_status_t joined(janus_id_t serverId, janus_id_t senderId, janus_id_t roomId, janus_id_t participantId) {
switch_core_session_t *session;
switch_channel_t *channel;
private_t *tech_pvt;
server_t *pServer;
if (!(pServer = (server_t *) hashFind(&globals.serverIdLookup, serverId))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "No server for serverId=%" SWITCH_UINT64_T_FMT "\n", serverId);
return SWITCH_STATUS_NOTFOUND;
}
if (!(session = (switch_core_session_t *) hashFind(&pServer->senderIdLookup, senderId))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "No session for senderId=%" SWITCH_UINT64_T_FMT "\n", senderId);
return SWITCH_STATUS_NOTFOUND;
}
channel = switch_core_session_get_channel(session);
switch_assert(channel);
tech_pvt = switch_core_session_get_private(session);
switch_assert(tech_pvt);
switch_channel_set_variable(channel, "media_webrtc", "true");
switch_channel_set_flag(channel, CF_AUDIO);
switch_channel_set_variable(channel, "absolute_codec_string", pServer->codec_string);
switch_core_media_prepare_codecs(session, SWITCH_TRUE);
switch_core_session_set_ice(session);
for (unsigned int i = 0; i < pServer->cand_acl_count; i ++) {
switch_core_media_add_ice_acl(session, SWITCH_MEDIA_TYPE_AUDIO, pServer->cand_acl[i]);
}
if (switch_core_media_choose_ports(session, SWITCH_TRUE, SWITCH_FALSE) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Cannot choose ports\n");
switch_channel_hangup(channel, SWITCH_CAUSE_NETWORK_OUT_OF_ORDER);
return SWITCH_STATUS_FALSE;
}
switch_core_media_gen_local_sdp(session, SDP_TYPE_REQUEST, NULL, 0, NULL, 0);
//switch_channel_set_flag(channel, CF_REQ_MEDIA);
//switch_channel_set_flag(channel, CF_MEDIA_ACK);
//switch_channel_set_flag(channel, CF_MEDIA_SET);
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "Generated SDP=%s\n", tech_pvt->mparams.local_sdp_str);
if (apiConfigure(pServer->pUrl, pServer->pSecret, tech_pvt->serverId, tech_pvt->senderId,
switch_channel_var_true(channel, "janus-start-muted"),
switch_channel_var_true(channel, "janus-user-record"),
switch_channel_get_variable(channel, "janus-user-record-file"),
"offer", tech_pvt->mparams.local_sdp_str) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Failed to configure\n");
switch_channel_hangup(channel, SWITCH_CAUSE_NETWORK_OUT_OF_ORDER);
}
return SWITCH_STATUS_SUCCESS;
}
switch_status_t accepted(janus_id_t serverId, janus_id_t senderId, const char *pSdp) {
switch_core_session_t *session;
switch_channel_t *channel;
private_t *tech_pvt;
server_t *pServer;
if (!(pServer = (server_t *) hashFind(&globals.serverIdLookup, serverId))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "No server for serverId=%" SWITCH_UINT64_T_FMT "\n", serverId);
return SWITCH_STATUS_NOTFOUND;
}
if (!(session = (switch_core_session_t *) hashFind(&pServer->senderIdLookup, senderId))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "No session for senderId=%" SWITCH_UINT64_T_FMT "\n", senderId);
return SWITCH_STATUS_NOTFOUND;
}
channel = switch_core_session_get_channel(session);
switch_assert(channel);
tech_pvt = switch_core_session_get_private(session);
switch_assert(tech_pvt);
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "ACCEPTED sdp=%s\n", pSdp);
if (!switch_core_media_negotiate_sdp(session, pSdp, NULL, SDP_TYPE_RESPONSE)) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "Cannot negotiate SDP\n");
switch_channel_hangup(channel, SWITCH_CAUSE_NETWORK_OUT_OF_ORDER);
return SWITCH_STATUS_FALSE;
}
if (switch_core_media_activate_rtp(session) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "switch_core_media_activate_rtp success\n");
switch_channel_hangup(channel, SWITCH_CAUSE_NETWORK_OUT_OF_ORDER);
return SWITCH_STATUS_FALSE;
}
switch_yield(1000000);
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "doing pre-answer\n");
switch_channel_pre_answer(channel);
switch_set_flag_locked(tech_pvt, TFLAG_VOICE);
tech_pvt->read_frame.codec = switch_core_session_get_read_codec(session);
return SWITCH_STATUS_SUCCESS;
}
switch_status_t answered(janus_id_t serverId, janus_id_t senderId) {
// called when we get a webrtcup event from Janus
switch_core_session_t *session;
switch_channel_t *channel;
server_t *pServer;
if (!(pServer = (server_t *) hashFind(&globals.serverIdLookup, serverId))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "No server for serverId=%" SWITCH_UINT64_T_FMT "\n", serverId);
return SWITCH_STATUS_NOTFOUND;
}
if (!(session = (switch_core_session_t *) hashFind(&pServer->senderIdLookup, senderId))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "No session for senderId=%" SWITCH_UINT64_T_FMT "\n", senderId);
return SWITCH_STATUS_NOTFOUND;
}
channel = switch_core_session_get_channel(session);
switch_assert(channel);
switch_channel_answer(channel);
return SWITCH_STATUS_SUCCESS;
}
switch_status_t hungup(janus_id_t serverId, janus_id_t senderId, const char *pReason) {
switch_core_session_t *session;
switch_channel_t *channel;
server_t *pServer;
if (!(pServer = (server_t *) hashFind(&globals.serverIdLookup, serverId))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "No server for serverId=%" SWITCH_UINT64_T_FMT "\n", serverId);
return SWITCH_STATUS_NOTFOUND;
}
if (!(session = (switch_core_session_t *) hashFind(&pServer->senderIdLookup, senderId))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "No session for senderId=%" SWITCH_UINT64_T_FMT "\n", senderId);
return SWITCH_STATUS_NOTFOUND;
}
channel = switch_core_session_get_channel(session);
switch_assert(channel);
switch_channel_hangup(channel, SWITCH_CAUSE_NORMAL_CLEARING);
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "Hungup reason=%s\n", pReason);
return SWITCH_STATUS_SUCCESS;
}
static void *SWITCH_THREAD_FUNC server_thread_run(switch_thread_t *pThread, void *pObj) {
server_t *pServer = (server_t *) pObj;
janus_id_t serverId = 0;
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "Thread started - server=%s\n", pServer->name);
(void) hashCreate(&pServer->senderIdLookup, globals.pModulePool);
while (!switch_test_flag(pServer, SFLAG_TERMINATING)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "Server=%s invoking\n", pServer->name);
// wait for a few seconds before re-connection
switch_yield(5000000);
if (serverId) {
// the connection or Janus has restarted - try to re-use the same serverId
switch_status_t status = apiClaimServerId(pServer->pUrl, pServer->pSecret, serverId);
if (status == SWITCH_STATUS_SOCKERR) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Server=%s claim socket error - retry later\n", pServer->name);
} else if (status == SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "Server=%s claim success - serverId=%" SWITCH_UINT64_T_FMT "\n", pServer->name, serverId);
if (hashInsert(&globals.serverIdLookup, serverId, (void *) pServer) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Couldn't insert server into hash table\n");
}
} else {
// terminate all calls in progress on this server
switch_core_session_t *session;
private_t *tech_pvt;
switch_channel_t *channel;
switch_hash_index_t *pIndex = NULL;
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Server=%s claim failed - status=%d\n", pServer->name, status);
while ((session = (switch_core_session_t *) hashIterate(&pServer->senderIdLookup, &pIndex)) != NULL) {
tech_pvt = switch_core_session_get_private(session);
switch_assert(tech_pvt);
channel = switch_core_session_get_channel(session);
switch_assert(channel);
//NB. the server is likely to have been removed by the time the hangup has completed
switch_channel_hangup(channel, SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER);
(void) hashDelete(&pServer->senderIdLookup, tech_pvt->senderId);
}
// reset serverId so we get a new one the next time around
serverId = 0;
}
} else {
// first time
serverId = apiGetServerId(pServer->pUrl, pServer->pSecret);
if (!serverId) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Error getting serverId\n");
} else if (hashInsert(&globals.serverIdLookup, serverId, (void *) pServer) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Couldn't insert server into hash table\n");
} else {
switch_mutex_lock(pServer->mutex);
pServer->started = switch_time_now();
pServer->serverId = serverId;
pServer->callsInProgress = 0;
switch_mutex_unlock(pServer->mutex);
}
}
while (!switch_test_flag(pServer, SFLAG_TERMINATING) && hashFind(&globals.serverIdLookup, serverId)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "Poll started\n");
if (apiPoll(pServer->pUrl, pServer->pSecret, serverId, pServer->pAuthToken, joined, accepted, answered, hungup) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Poll failed\n");
if (hashDelete(&globals.serverIdLookup, serverId) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Couldn't remove server from hash table\n");
}
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "Poll completed\n");
}
}
}
(void) hashDestroy(&pServer->senderIdLookup);
(void) hashDelete(&globals.serverIdLookup, serverId);
return NULL;
}
static void startServerThread(server_t *pServer, switch_bool_t force) {
switch_threadattr_t *pThreadAttr = NULL;
switch_assert(pServer);
switch_mutex_lock(pServer->flag_mutex);
if (force || !switch_test_flag(pServer, SFLAG_ENABLED)) {
switch_set_flag(pServer, SFLAG_ENABLED);
switch_mutex_unlock(pServer->flag_mutex);
DEBUG(SWITCH_CHANNEL_LOG, "Starting server=%s\n", pServer->name);
switch_threadattr_create(&pThreadAttr, globals.pModulePool);
//switch_threadattr_detach_set(pThreadAttr, 1);
switch_threadattr_stacksize_set(pThreadAttr, SWITCH_THREAD_STACKSIZE);
switch_thread_create(&pServer->pThread, pThreadAttr, server_thread_run, pServer, globals.pModulePool);
} else {
switch_mutex_unlock(pServer->flag_mutex);
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Server=%s is already enabled\n", pServer->name);
}
}
static void stopServerThread(server_t *pServer) {
switch_status_t status, returnValue;
switch_assert(pServer);
switch_mutex_lock(pServer->flag_mutex);
if (switch_test_flag(pServer, SFLAG_ENABLED) &&
!switch_test_flag(pServer, SFLAG_TERMINATING) && pServer->pThread) {
switch_set_flag(pServer, SFLAG_TERMINATING);
switch_mutex_unlock(pServer->flag_mutex);
DEBUG(SWITCH_CHANNEL_LOG, "Stopping server=%s\n", pServer->name);
// wait for the thread to terminate. If we don't do this the thread is
// forcefully terminated and valgrind complains about memory being leaked.
status = switch_thread_join(&returnValue, pServer->pThread);
pServer->pThread = NULL;
if ((status != SWITCH_STATUS_SUCCESS) || (returnValue != SWITCH_STATUS_SUCCESS)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Server=%s result from thread=%d %d\n",
pServer->name, status, returnValue);
}
switch_clear_flag_locked(pServer, SFLAG_TERMINATING | SFLAG_ENABLED);
} else {
switch_mutex_unlock(pServer->flag_mutex);
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Server=%s is already disabled\n", pServer->name);
}
}
static switch_bool_t isVideoCall(switch_core_session_t *session) {
switch_channel_t *channel;
switch_assert(session);
channel = switch_core_session_get_channel(session);
switch_assert(channel);
return switch_channel_test_flag(channel, CF_VIDEO);
}
/*
State methods they get called when the state changes to the specific state
returning SWITCH_STATUS_SUCCESS tells the core to execute the standard state method next
so if you fully implement the state you can return SWITCH_STATUS_FALSE to skip it.
*/
static switch_status_t channel_on_init(switch_core_session_t *session)
{
switch_channel_t *channel = NULL;
private_t *tech_pvt = NULL;
server_t *pServer = NULL;
switch_assert(session);
tech_pvt = switch_core_session_get_private(session);
switch_assert(tech_pvt);
channel = switch_core_session_get_channel(session);
switch_assert(channel);
if (!switch_test_flag(tech_pvt, TFLAG_OUTBOUND)) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_WARNING, "Module supports only outgoing calls\n");
switch_channel_hangup(channel, SWITCH_CAUSE_INCOMPATIBLE_DESTINATION);
return SWITCH_STATUS_FALSE;
}
if (!(pServer = (server_t *) hashFind(&globals.serverIdLookup, tech_pvt->serverId))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "No server for serverId=%" SWITCH_UINT64_T_FMT "\n", tech_pvt->serverId);
switch_channel_hangup(channel, SWITCH_CAUSE_INCOMPATIBLE_DESTINATION);
return SWITCH_STATUS_NOTFOUND;
}
tech_pvt->senderId = apiGetSenderId(pServer->pUrl, pServer->pSecret, tech_pvt->serverId);
if (!tech_pvt->senderId) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Error getting senderId\n");
switch_channel_hangup(channel, SWITCH_CAUSE_INCOMPATIBLE_DESTINATION);
return SWITCH_STATUS_FALSE;
}
if (hashInsert(&pServer->senderIdLookup, tech_pvt->senderId, (void *) session) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Failed to insert senderId=%" SWITCH_UINT64_T_FMT " in hash\n", tech_pvt->senderId);
switch_channel_hangup(channel, SWITCH_CAUSE_INCOMPATIBLE_DESTINATION);
return SWITCH_STATUS_FALSE;
}
if (switch_channel_var_false(channel, "janus-use-existing-room")) {
if (!apiCreateRoom(pServer->pUrl, pServer->pSecret, tech_pvt->serverId, tech_pvt->senderId, tech_pvt->roomId,
switch_channel_get_variable(channel, "janus-room-description"),
switch_channel_var_true(channel, "janus-room-record"),
switch_channel_get_variable(channel, "janus-room-record-file"),
switch_channel_get_variable(channel, "janus-room-pin"))) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Failed to create room\n");
switch_channel_hangup(channel, SWITCH_CAUSE_INCOMPATIBLE_DESTINATION);
return SWITCH_STATUS_FALSE;
}
}
switch_set_flag_locked(tech_pvt, TFLAG_IO);
switch_mutex_lock(pServer->mutex);
pServer->callsInProgress ++;
pServer->totalCalls ++;
switch_mutex_unlock(pServer->mutex);
switch_mutex_lock(globals.mutex);
globals.callsInProgress ++;
globals.totalCalls ++;
switch_mutex_unlock(globals.mutex);
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t channel_on_routing(switch_core_session_t *session)
{
switch_channel_t *channel = NULL;
private_t *tech_pvt = NULL;
server_t *pServer = NULL;
switch_assert(session);
channel = switch_core_session_get_channel(session);
switch_assert(channel);
tech_pvt = switch_core_session_get_private(session);
switch_assert(tech_pvt);
DEBUG(SWITCH_CHANNEL_SESSION_LOG(session), "%s CHANNEL ROUTING\n", switch_channel_get_name(channel));
if (!(pServer = (server_t *) hashFind(&globals.serverIdLookup, tech_pvt->serverId))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "No server for serverId=%" SWITCH_UINT64_T_FMT "\n", tech_pvt->serverId);
switch_channel_hangup(channel, SWITCH_CAUSE_INCOMPATIBLE_DESTINATION);
return SWITCH_STATUS_NOTFOUND;
}
if (apiJoin(pServer->pUrl, pServer->pSecret, tech_pvt->serverId,
tech_pvt->senderId, tech_pvt->roomId, tech_pvt->pDisplay,
switch_channel_get_variable(channel, "janus-room-pin"),
switch_channel_get_variable(channel, "janus-user-token")) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Failed to join room\n");
switch_channel_hangup(channel, SWITCH_CAUSE_INCOMPATIBLE_DESTINATION);
return SWITCH_STATUS_FALSE;
}
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t channel_on_execute(switch_core_session_t *session)
{
switch_channel_t *channel = NULL;
private_t *tech_pvt = NULL;
switch_assert(session);
channel = switch_core_session_get_channel(session);
switch_assert(channel);
tech_pvt = switch_core_session_get_private(session);
switch_assert(tech_pvt);
DEBUG(SWITCH_CHANNEL_SESSION_LOG(session), "%s CHANNEL EXECUTE\n", switch_channel_get_name(channel));
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t channel_on_destroy(switch_core_session_t *session)
{
switch_channel_t *channel = NULL;
private_t *tech_pvt = NULL;
switch_assert(session);
channel = switch_core_session_get_channel(session);
switch_assert(channel);
DEBUG(SWITCH_CHANNEL_SESSION_LOG(session), "%s CHANNEL DESTROY\n", switch_channel_get_name(channel));
tech_pvt = switch_core_session_get_private(session);
if (tech_pvt) {
if (switch_core_codec_ready(&tech_pvt->read_codec)) {
switch_core_codec_destroy(&tech_pvt->read_codec);
}
if (switch_core_codec_ready(&tech_pvt->write_codec)) {
switch_core_codec_destroy(&tech_pvt->write_codec);
}
}
switch_core_media_deactivate_rtp(session);
switch_media_handle_destroy(session);
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t channel_on_hangup(switch_core_session_t *session)
{
switch_channel_t *channel = NULL;
private_t *tech_pvt = NULL;
server_t *pServer = NULL;
switch_assert(session);
channel = switch_core_session_get_channel(session);
switch_assert(channel);
tech_pvt = switch_core_session_get_private(session);
switch_assert(tech_pvt);
switch_core_media_kill_socket(session, SWITCH_MEDIA_TYPE_AUDIO);
switch_clear_flag_locked(tech_pvt, TFLAG_IO);
switch_clear_flag_locked(tech_pvt, TFLAG_VOICE);
DEBUG(SWITCH_CHANNEL_SESSION_LOG(session), "%s CHANNEL HANGUP\n", switch_channel_get_name(channel));
if (!(pServer = (server_t *) hashFind(&globals.serverIdLookup, tech_pvt->serverId))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "No server for serverId=%" SWITCH_UINT64_T_FMT "\n", tech_pvt->serverId);
// we can get here if the calls are being terminated because the server has failed
return SWITCH_STATUS_NOTFOUND;
}
if (apiLeave(pServer->pUrl, pServer->pSecret, tech_pvt->serverId, tech_pvt->senderId) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Failed to leave room\n");
// carry on regardless
}
if (apiDetach(pServer->pUrl, pServer->pSecret, tech_pvt->serverId, tech_pvt->senderId) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Failed to detach\n");
// carry on regardless
}
(void) hashDelete(&pServer->senderIdLookup, tech_pvt->senderId);
switch_mutex_lock(pServer->mutex);
if (pServer->callsInProgress > 0) {
pServer->callsInProgress --;
}
switch_mutex_unlock(pServer->mutex);
switch_mutex_lock(globals.mutex);
if (globals.callsInProgress > 0) {
globals.callsInProgress --;
}
switch_mutex_unlock(globals.mutex);
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t channel_kill_channel(switch_core_session_t *session, int sig)
{
switch_channel_t *channel = NULL;
private_t *tech_pvt = NULL;
switch_assert(session);
channel = switch_core_session_get_channel(session);
switch_assert(channel);
tech_pvt = switch_core_session_get_private(session);
switch_assert(tech_pvt);
DEBUG(SWITCH_CHANNEL_SESSION_LOG(session), "%s CHANNEL KILLED sig=%d\n", switch_channel_get_name(channel), sig);
switch (sig) {
case SWITCH_SIG_KILL:
switch_set_flag_locked(tech_pvt, TFLAG_IO);
switch_core_media_kill_socket(session, SWITCH_MEDIA_TYPE_AUDIO);
break;
case SWITCH_SIG_BREAK:
switch_set_flag_locked(tech_pvt, TFLAG_BREAK);
switch_core_media_break(session, SWITCH_MEDIA_TYPE_AUDIO);
break;
default:
break;
}
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t channel_on_exchange_media(switch_core_session_t *session)
{
DEBUG(SWITCH_CHANNEL_SESSION_LOG(session), "CHANNEL LOOPBACK\n");
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t channel_on_soft_execute(switch_core_session_t *session)
{
DEBUG(SWITCH_CHANNEL_SESSION_LOG(session), "CHANNEL TRANSMIT\n");
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t channel_send_dtmf(switch_core_session_t *session, const switch_dtmf_t *dtmf)
{
private_t *tech_pvt = switch_core_session_get_private(session);
switch_assert(tech_pvt);
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t channel_read_frame(switch_core_session_t *session, switch_frame_t **frame, switch_io_flag_t flags, int stream_id)
{
switch_channel_t *channel = NULL;
private_t *tech_pvt = NULL;
//switch_time_t started = switch_time_now();
//unsigned int elapsed;
switch_byte_t *data;
//DEBUG(SWITCH_CHANNEL_SESSION_LOG(session), "Read frame called\n");
channel = switch_core_session_get_channel(session);
assert(channel != NULL);
tech_pvt = switch_core_session_get_private(session);
switch_assert(tech_pvt);
tech_pvt->read_frame.flags = SFF_NONE;
*frame = NULL;
switch_set_flag(tech_pvt, TFLAG_VOICE);
while (switch_test_flag(tech_pvt, TFLAG_IO)) {
if (switch_test_flag(tech_pvt, TFLAG_BREAK)) {
switch_clear_flag(tech_pvt, TFLAG_BREAK);
goto cng;
}
if (!switch_test_flag(tech_pvt, TFLAG_IO)) {
return SWITCH_STATUS_FALSE;
}
if (switch_test_flag(tech_pvt, TFLAG_IO) && switch_test_flag(tech_pvt, TFLAG_VOICE)) {
switch_clear_flag_locked(tech_pvt, TFLAG_VOICE);
if (!tech_pvt->read_frame.datalen) {
continue;
}
*frame = &tech_pvt->read_frame;
#if SWITCH_BYTE_ORDER == __BIG_ENDIAN
if (switch_test_flag(tech_pvt, TFLAG_LINEAR)) {
switch_swap_linear((*frame)->data, (int) (*frame)->datalen / 2);
}
#endif
return switch_core_media_read_frame(session, frame, flags, stream_id, SWITCH_MEDIA_TYPE_AUDIO);
}
switch_cond_next();
}
return SWITCH_STATUS_FALSE;
cng:
data = (switch_byte_t *) tech_pvt->read_frame.data;
data[0] = 65;
data[1] = 0;
tech_pvt->read_frame.datalen = 2;
tech_pvt->read_frame.flags = SFF_CNG;
*frame = &tech_pvt->read_frame;
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t channel_write_frame(switch_core_session_t *session, switch_frame_t *frame, switch_io_flag_t flags, int stream_id)
{
//switch_status_t status = SWITCH_STATUS_SUCCESS;
switch_channel_t *channel = NULL;
private_t *tech_pvt = NULL;
//switch_frame_t *pframe;
channel = switch_core_session_get_channel(session);
switch_assert(channel);
tech_pvt = switch_core_session_get_private(session);
switch_assert(tech_pvt);
if (!switch_test_flag(tech_pvt, TFLAG_IO)) {
return SWITCH_STATUS_FALSE;
}
#if SWITCH_BYTE_ORDER == __BIG_ENDIAN
if (switch_test_flag(tech_pvt, TFLAG_LINEAR)) {
switch_swap_linear(frame->data, (int) frame->datalen / 2);
}
#endif
return switch_core_media_write_frame(session, frame, flags, stream_id, SWITCH_MEDIA_TYPE_AUDIO);
}
static switch_status_t channel_answer_channel(switch_core_session_t *session)
{
private_t *tech_pvt;
switch_channel_t *channel = NULL;
channel = switch_core_session_get_channel(session);
switch_assert(channel);
tech_pvt = switch_core_session_get_private(session);
switch_assert(tech_pvt);
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t channel_receive_message(switch_core_session_t *session, switch_core_session_message_t *msg)
{
switch_channel_t *channel;
private_t *tech_pvt;
channel = switch_core_session_get_channel(session);
switch_assert(channel);
tech_pvt = (private_t *) switch_core_session_get_private(session);
switch_assert(tech_pvt);
switch (msg->message_id) {
case SWITCH_MESSAGE_INDICATE_ANSWER:
{
channel_answer_channel(session);
}
break;
default:
break;
}
return SWITCH_STATUS_SUCCESS;
}
/* Make sure when you have 2 sessions in the same scope that you pass the appropriate one to the routines
that allocate memory or you will have 1 channel with memory allocated from another channel's pool!
*/
static switch_call_cause_t channel_outgoing_channel(switch_core_session_t *session, switch_event_t *var_event,
switch_caller_profile_t *outbound_profile,
switch_core_session_t **new_session, switch_memory_pool_t **pool, switch_originate_flag_t flags,
switch_call_cause_t *cancel_cause)
{
char channelName[2048] = "janus/";
char *pServerName = NULL;
char *pCurr = NULL;
char *pNext = NULL;
char *pDialStr = NULL;
private_t *tech_pvt;
switch_channel_t *channel;
switch_caller_profile_t *caller_profile;
switch_call_cause_t status = SWITCH_CAUSE_SUCCESS;
server_t *pTmpServer, *pServer;
if (isVideoCall(session)) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "Only implemented for audio calls\n");
return SWITCH_CAUSE_BEARERCAPABILITY_NOTIMPL;
}
*new_session = switch_core_session_request(janus_endpoint_interface, SWITCH_CALL_DIRECTION_OUTBOUND, flags, pool);
if (!*new_session) {
return SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER;
}
if (!outbound_profile) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_WARNING, "Doh! no caller profile\n");
status = SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER;
goto error;
}
channel = switch_core_session_get_channel(*new_session);
switch_assert(channel);
(void) strncat(channelName, outbound_profile->destination_number, sizeof(channelName) - 7);
switch_channel_set_name(channel, channelName);
pDialStr = switch_safe_strdup(outbound_profile->destination_number);
if (pDialStr == NULL) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Cannot allocate memory for dialstring\n");
status = SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER;
goto error;
}
pCurr = pDialStr;
pNext = strchr(pCurr, '/');
if (pNext == NULL) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Invalid dialstring format=%s\n", pDialStr);
status = SWITCH_CAUSE_PROTOCOL_ERROR;
goto error;
}
*pNext ++ = '\0';
pServerName = pDialStr;
if (!(pTmpServer = serversFind(pServerName))) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Unknown server=%s\n", pServerName);
status = SWITCH_CAUSE_NO_ROUTE_DESTINATION;
goto error;
}
DEBUG(SWITCH_CHANNEL_SESSION_LOG(session), "Found serverId=%" SWITCH_UINT64_T_FMT "\n", pTmpServer->serverId);
// check that the server is available via the serverIdLookup map - ie. that it is active
if (!(pServer = (server_t *) hashFind(&globals.serverIdLookup, pTmpServer->serverId))) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_WARNING, "No server for serverId=%" SWITCH_UINT64_T_FMT "\n", pTmpServer->serverId);
status = SWITCH_CAUSE_NO_ROUTE_DESTINATION;
goto error;
}
if (!switch_test_flag(pServer, SFLAG_ENABLED)) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_INFO, "Server=%s has been disabled\n", pServer->name);
return SWITCH_CAUSE_OUTGOING_CALL_BARRED;
}
switch_core_session_add_stream(*new_session, NULL);
if (!(tech_pvt = (private_t *) switch_core_session_alloc(*new_session, sizeof(private_t)))) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_CRIT, "Hey where is my memory pool?\n");
status = SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER;
goto error;
}
tech_pvt->read_frame.data = tech_pvt->databuf;
tech_pvt->read_frame.buflen = sizeof(tech_pvt->databuf);
switch_mutex_init(&tech_pvt->mutex, SWITCH_MUTEX_NESTED, switch_core_session_get_pool(*new_session));
switch_mutex_init(&tech_pvt->flag_mutex, SWITCH_MUTEX_NESTED, switch_core_session_get_pool(*new_session));
switch_core_session_set_private(*new_session, tech_pvt);
switch_media_handle_create(&tech_pvt->smh, *new_session, &tech_pvt->mparams);
//tech_pvt->mparams.codec_string = switch_core_session_strdup(*new_session, pServer->codec_string);
if (!zstr(pServer->rtpip)) {
tech_pvt->mparams.rtpip4 = switch_core_session_strdup(*new_session, pServer->rtpip);
tech_pvt->mparams.rtpip = tech_pvt->mparams.rtpip4;
}
if (!zstr(pServer->rtpip6)) {
tech_pvt->mparams.rtpip6 = switch_core_session_strdup(*new_session, pServer->rtpip6);
}
tech_pvt->mparams.local_network = pServer->local_network;
tech_pvt->mparams.extrtpip = pServer->extrtpip;
tech_pvt->serverId = pServer->serverId;
pCurr = pNext;
pNext = strchr(pCurr, '@');
if (pNext == NULL) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Invalid dialstring format=%s\n", pDialStr);
status = SWITCH_CAUSE_PROTOCOL_ERROR;
goto error;
}
*pNext ++ = '\0';
tech_pvt->pDisplay = switch_core_session_strdup(*new_session, pCurr);
tech_pvt->roomId = strtoull(pNext, NULL, 10);
caller_profile = switch_caller_profile_clone(*new_session, outbound_profile);
switch_channel_set_caller_profile(channel, caller_profile);
tech_pvt->caller_profile = caller_profile;
switch_channel_ring_ready(channel);
switch_set_flag_locked(tech_pvt, TFLAG_OUTBOUND);
switch_channel_set_state(channel, CS_INIT);
switch_safe_free(pDialStr);
return status;
error:
switch_safe_free(pDialStr);
switch_core_session_destroy(new_session);
return status;
}
static switch_status_t channel_receive_event(switch_core_session_t *session, switch_event_t *event)
{
struct private_object *tech_pvt = switch_core_session_get_private(session);
char *body = switch_event_get_body(event);
switch_assert(tech_pvt);
if (!body) {
body = "";
}
return SWITCH_STATUS_SUCCESS;
}
switch_state_handler_table_t janus_state_handlers = {
/*.on_init */ channel_on_init,
/*.on_routing */ channel_on_routing,
/*.on_execute */ channel_on_execute,
/*.on_hangup */ channel_on_hangup,
/*.on_exchange_media */ channel_on_exchange_media,
/*.on_soft_execute */ channel_on_soft_execute,
/*.on_consume_media */ NULL,
/*.on_hibernate */ NULL,
/*.on_reset */ NULL,
/*.on_park */ NULL,
/*.on_reporting */ NULL,
/*.on_destroy */ channel_on_destroy
};
switch_io_routines_t janus_io_routines = {
/*.outgoing_channel */ channel_outgoing_channel,
/*.read_frame */ channel_read_frame,
/*.write_frame */ channel_write_frame,
/*.kill_channel */ channel_kill_channel,
/*.send_dtmf */ channel_send_dtmf,
/*.receive_message */ channel_receive_message,
/*.receive_event */ channel_receive_event
};
static switch_status_t load_config(void)
{
char *cf = "janus.conf";
switch_xml_t cfg, xml, settings, param, xmlint;
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Janus - loading config\n");
if (!(xml = switch_xml_open_cfg(cf, &cfg, NULL))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Open of %s failed\n", cf);
return SWITCH_STATUS_TERM;
}
if ((settings = switch_xml_child(cfg, "settings"))) {
for (param = switch_xml_child(settings, "param"); param; param = param->next) {
char *pVarStr = (char *) switch_xml_attr_soft(param, "name");
char *pValStr = (char *) switch_xml_attr_soft(param, "value");
DEBUG(SWITCH_CHANNEL_LOG, "Config %s->%s\n", pVarStr, pValStr);
if (!strcmp(pVarStr, "debug")) {
globals.debug = switch_true(pValStr);
}
}
}