1085 lines
35 KiB
C
1085 lines
35 KiB
C
/*
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* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
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* Copyright (C) 2005-2012, Anthony Minessale II <anthm@freeswitch.org>
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*
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* Version: MPL 1.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
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*
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* The Initial Developer of the Original Code is
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* Anthony Minessale II <anthm@freeswitch.org>
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* Portions created by the Initial Developer are Copyright (C)
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Anthony Minessale II <anthm@freeswitch.org>
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*
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*
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* mod_loopback.c -- Loopback Endpoint Module
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*
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*/
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#include <switch.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <string.h>
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#define FRAME_QUEUE_LEN 3
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SWITCH_MODULE_LOAD_FUNCTION(mod_loopback_load);
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SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_loopback_shutdown);
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SWITCH_MODULE_DEFINITION(mod_loopback, mod_loopback_load, mod_loopback_shutdown, NULL);
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static switch_endpoint_interface_t *loopback_endpoint_interface = NULL;
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typedef enum {
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TFLAG_LINKED = (1 << 0),
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TFLAG_OUTBOUND = (1 << 1),
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TFLAG_WRITE = (1 << 2),
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TFLAG_USEME = (1 << 3),
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TFLAG_BRIDGE = (1 << 4),
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TFLAG_BOWOUT = (1 << 5),
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TFLAG_BLEG = (1 << 6),
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TFLAG_APP = (1 << 7),
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TFLAG_RUNNING_APP = (1 << 8),
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TFLAG_BOWOUT_USED = (1 << 9),
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TFLAG_CLEAR = (1 << 10)
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} TFLAGS;
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struct private_object {
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unsigned int flags;
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switch_mutex_t *flag_mutex;
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switch_mutex_t *mutex;
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switch_core_session_t *session;
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switch_channel_t *channel;
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switch_core_session_t *other_session;
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struct private_object *other_tech_pvt;
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switch_channel_t *other_channel;
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switch_codec_t read_codec;
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switch_codec_t write_codec;
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switch_frame_t read_frame;
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unsigned char databuf[SWITCH_RECOMMENDED_BUFFER_SIZE];
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switch_frame_t *x_write_frame;
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switch_frame_t *write_frame;
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unsigned char write_databuf[SWITCH_RECOMMENDED_BUFFER_SIZE];
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switch_frame_t cng_frame;
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unsigned char cng_databuf[SWITCH_RECOMMENDED_BUFFER_SIZE];
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switch_timer_t timer;
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switch_caller_profile_t *caller_profile;
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int32_t bowout_frame_count;
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char *other_uuid;
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switch_queue_t *frame_queue;
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int64_t packet_count;
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int first_cng;
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};
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typedef struct private_object private_t;
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static struct {
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int debug;
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} globals;
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static switch_status_t channel_on_init(switch_core_session_t *session);
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static switch_status_t channel_on_hangup(switch_core_session_t *session);
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static switch_status_t channel_on_destroy(switch_core_session_t *session);
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static switch_status_t channel_on_routing(switch_core_session_t *session);
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static switch_status_t channel_on_exchange_media(switch_core_session_t *session);
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static switch_status_t channel_on_soft_execute(switch_core_session_t *session);
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static switch_call_cause_t channel_outgoing_channel(switch_core_session_t *session, switch_event_t *var_event,
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switch_caller_profile_t *outbound_profile,
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switch_core_session_t **new_session, switch_memory_pool_t **pool, switch_originate_flag_t flags,
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switch_call_cause_t *cancel_cause);
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static switch_status_t channel_read_frame(switch_core_session_t *session, switch_frame_t **frame, switch_io_flag_t flags, int stream_id);
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static switch_status_t channel_write_frame(switch_core_session_t *session, switch_frame_t *frame, switch_io_flag_t flags, int stream_id);
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static switch_status_t channel_kill_channel(switch_core_session_t *session, int sig);
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static void clear_queue(private_t *tech_pvt)
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{
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void *pop;
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while (switch_queue_trypop(tech_pvt->frame_queue, &pop) == SWITCH_STATUS_SUCCESS && pop) {
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switch_frame_t *frame = (switch_frame_t *) pop;
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switch_frame_free(&frame);
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}
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}
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static switch_status_t tech_init(private_t *tech_pvt, switch_core_session_t *session, switch_codec_t *codec)
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{
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const char *iananame = "L16";
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int rate = 8000;
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int interval = 20;
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switch_status_t status = SWITCH_STATUS_SUCCESS;
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switch_channel_t *channel = switch_core_session_get_channel(session);
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const switch_codec_implementation_t *read_impl;
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if (codec) {
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iananame = codec->implementation->iananame;
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rate = codec->implementation->samples_per_second;
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interval = codec->implementation->microseconds_per_packet / 1000;
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}
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if (switch_core_codec_ready(&tech_pvt->read_codec)) {
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switch_core_codec_destroy(&tech_pvt->read_codec);
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}
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if (switch_core_codec_ready(&tech_pvt->write_codec)) {
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switch_core_codec_destroy(&tech_pvt->write_codec);
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}
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switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s setup codec %s/%d/%d\n", switch_channel_get_name(channel), iananame, rate,
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interval);
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status = switch_core_codec_init(&tech_pvt->read_codec,
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iananame,
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NULL,
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rate, interval, 1, SWITCH_CODEC_FLAG_ENCODE | SWITCH_CODEC_FLAG_DECODE, NULL, switch_core_session_get_pool(session));
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if (status != SWITCH_STATUS_SUCCESS || !tech_pvt->read_codec.implementation || !switch_core_codec_ready(&tech_pvt->read_codec)) {
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goto end;
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}
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status = switch_core_codec_init(&tech_pvt->write_codec,
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iananame,
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NULL,
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rate, interval, 1, SWITCH_CODEC_FLAG_ENCODE | SWITCH_CODEC_FLAG_DECODE, NULL, switch_core_session_get_pool(session));
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if (status != SWITCH_STATUS_SUCCESS) {
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switch_core_codec_destroy(&tech_pvt->read_codec);
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goto end;
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}
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tech_pvt->read_frame.data = tech_pvt->databuf;
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tech_pvt->read_frame.buflen = sizeof(tech_pvt->databuf);
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tech_pvt->read_frame.codec = &tech_pvt->read_codec;
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tech_pvt->cng_frame.data = tech_pvt->cng_databuf;
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tech_pvt->cng_frame.buflen = sizeof(tech_pvt->cng_databuf);
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tech_pvt->cng_frame.datalen = 2;
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tech_pvt->bowout_frame_count = (tech_pvt->read_codec.implementation->actual_samples_per_second /
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tech_pvt->read_codec.implementation->samples_per_packet) * 2;
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switch_core_session_set_read_codec(session, &tech_pvt->read_codec);
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switch_core_session_set_write_codec(session, &tech_pvt->write_codec);
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if (tech_pvt->flag_mutex) {
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switch_core_timer_destroy(&tech_pvt->timer);
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}
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read_impl = tech_pvt->read_codec.implementation;
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switch_core_timer_init(&tech_pvt->timer, "soft",
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read_impl->microseconds_per_packet / 1000, read_impl->samples_per_packet * 4, switch_core_session_get_pool(session));
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if (!tech_pvt->flag_mutex) {
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switch_mutex_init(&tech_pvt->flag_mutex, SWITCH_MUTEX_NESTED, switch_core_session_get_pool(session));
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switch_mutex_init(&tech_pvt->mutex, SWITCH_MUTEX_NESTED, switch_core_session_get_pool(session));
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switch_core_session_set_private(session, tech_pvt);
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switch_queue_create(&tech_pvt->frame_queue, FRAME_QUEUE_LEN, switch_core_session_get_pool(session));
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tech_pvt->session = session;
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tech_pvt->channel = switch_core_session_get_channel(session);
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}
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end:
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return status;
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}
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/*
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State methods they get called when the state changes to the specific state
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returning SWITCH_STATUS_SUCCESS tells the core to execute the standard state method next
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so if you fully implement the state you can return SWITCH_STATUS_FALSE to skip it.
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*/
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static switch_status_t channel_on_init(switch_core_session_t *session)
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{
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switch_channel_t *channel, *b_channel;
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private_t *tech_pvt = NULL, *b_tech_pvt = NULL;
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switch_core_session_t *b_session;
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char name[128];
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switch_caller_profile_t *caller_profile;
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switch_event_t *vars = NULL;
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tech_pvt = switch_core_session_get_private(session);
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switch_assert(tech_pvt != NULL);
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channel = switch_core_session_get_channel(session);
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switch_assert(channel != NULL);
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if (switch_test_flag(tech_pvt, TFLAG_OUTBOUND) && !switch_test_flag(tech_pvt, TFLAG_BLEG)) {
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if (!(b_session = switch_core_session_request(loopback_endpoint_interface, SWITCH_CALL_DIRECTION_INBOUND, SOF_NONE, NULL))) {
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switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_CRIT, "Failure.\n");
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goto end;
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}
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if (switch_core_session_read_lock(b_session) != SWITCH_STATUS_SUCCESS) {
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switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_CRIT, "Failure.\n");
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switch_core_session_destroy(&b_session);
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goto end;
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}
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switch_core_session_add_stream(b_session, NULL);
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b_channel = switch_core_session_get_channel(b_session);
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b_tech_pvt = (private_t *) switch_core_session_alloc(b_session, sizeof(*b_tech_pvt));
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switch_snprintf(name, sizeof(name), "loopback/%s-b", tech_pvt->caller_profile->destination_number);
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switch_channel_set_name(b_channel, name);
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if (tech_init(b_tech_pvt, b_session, switch_core_session_get_read_codec(session)) != SWITCH_STATUS_SUCCESS) {
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switch_channel_hangup(channel, SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER);
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switch_core_session_destroy(&b_session);
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goto end;
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}
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caller_profile = switch_caller_profile_clone(b_session, tech_pvt->caller_profile);
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caller_profile->source = switch_core_strdup(caller_profile->pool, modname);
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switch_channel_set_caller_profile(b_channel, caller_profile);
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b_tech_pvt->caller_profile = caller_profile;
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switch_channel_set_state(b_channel, CS_INIT);
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tech_pvt->other_session = b_session;
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tech_pvt->other_tech_pvt = b_tech_pvt;
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tech_pvt->other_channel = b_channel;
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//b_tech_pvt->other_session = session;
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//b_tech_pvt->other_tech_pvt = tech_pvt;
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//b_tech_pvt->other_channel = channel;
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b_tech_pvt->other_uuid = switch_core_session_strdup(b_session, switch_core_session_get_uuid(session));
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switch_set_flag_locked(tech_pvt, TFLAG_LINKED);
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switch_set_flag_locked(b_tech_pvt, TFLAG_LINKED);
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switch_set_flag_locked(b_tech_pvt, TFLAG_BLEG);
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switch_channel_set_flag(channel, CF_ACCEPT_CNG);
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if ((vars = (switch_event_t *) switch_channel_get_private(channel, "__loopback_vars__"))) {
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switch_event_header_t *h;
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switch_channel_set_private(channel, "__loopback_vars__", NULL);
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for (h = vars->headers; h; h = h->next) {
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switch_channel_set_variable(tech_pvt->other_channel, h->name, h->value);
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}
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switch_event_destroy(&vars);
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}
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if (switch_test_flag(tech_pvt, TFLAG_APP)) {
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switch_set_flag(b_tech_pvt, TFLAG_APP);
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switch_clear_flag(tech_pvt, TFLAG_APP);
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}
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switch_channel_set_variable(channel, "other_loopback_leg_uuid", switch_channel_get_uuid(b_channel));
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switch_channel_set_variable(b_channel, "other_loopback_leg_uuid", switch_channel_get_uuid(channel));
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if (switch_core_session_thread_launch(b_session) != SWITCH_STATUS_SUCCESS) {
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switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_CRIT, "Error spawning thread\n");
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switch_channel_hangup(channel, SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER);
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goto end;
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}
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} else if ((tech_pvt->other_session = switch_core_session_locate(tech_pvt->other_uuid))) {
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tech_pvt->other_tech_pvt = switch_core_session_get_private(tech_pvt->other_session);
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tech_pvt->other_channel = switch_core_session_get_channel(tech_pvt->other_session);
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}
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if (!tech_pvt->other_session) {
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switch_clear_flag_locked(tech_pvt, TFLAG_LINKED);
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switch_channel_hangup(channel, SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER);
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goto end;
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}
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switch_channel_set_variable(channel, "loopback_leg", switch_test_flag(tech_pvt, TFLAG_BLEG) ? "B" : "A");
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switch_channel_set_state(channel, CS_ROUTING);
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end:
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return SWITCH_STATUS_SUCCESS;
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}
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static void do_reset(private_t *tech_pvt)
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{
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switch_clear_flag_locked(tech_pvt, TFLAG_WRITE);
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switch_mutex_lock(tech_pvt->mutex);
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if (tech_pvt->other_tech_pvt) {
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switch_clear_flag_locked(tech_pvt->other_tech_pvt, TFLAG_WRITE);
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}
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switch_mutex_unlock(tech_pvt->mutex);
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}
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static switch_status_t channel_on_routing(switch_core_session_t *session)
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{
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switch_channel_t *channel = NULL;
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private_t *tech_pvt = NULL;
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const char *app, *arg;
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channel = switch_core_session_get_channel(session);
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assert(channel != NULL);
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tech_pvt = switch_core_session_get_private(session);
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assert(tech_pvt != NULL);
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do_reset(tech_pvt);
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switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s CHANNEL ROUTING\n", switch_channel_get_name(channel));
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if (switch_test_flag(tech_pvt, TFLAG_RUNNING_APP)) {
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switch_clear_flag(tech_pvt, TFLAG_RUNNING_APP);
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}
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if (switch_test_flag(tech_pvt, TFLAG_APP) && !switch_test_flag(tech_pvt, TFLAG_OUTBOUND) &&
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(app = switch_channel_get_variable(channel, "loopback_app"))) {
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switch_caller_extension_t *extension = NULL;
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switch_clear_flag(tech_pvt, TFLAG_APP);
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switch_set_flag(tech_pvt, TFLAG_RUNNING_APP);
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arg = switch_channel_get_variable(channel, "loopback_app_arg");
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extension = switch_caller_extension_new(session, app, app);
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switch_caller_extension_add_application(session, extension, "pre_answer", NULL);
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switch_caller_extension_add_application(session, extension, app, arg);
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switch_channel_set_caller_extension(channel, extension);
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switch_channel_set_state(channel, CS_EXECUTE);
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return SWITCH_STATUS_FALSE;
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}
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return SWITCH_STATUS_SUCCESS;
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}
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static switch_status_t channel_on_execute(switch_core_session_t *session)
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{
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switch_channel_t *channel = NULL;
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private_t *tech_pvt = NULL;
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channel = switch_core_session_get_channel(session);
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assert(channel != NULL);
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tech_pvt = switch_core_session_get_private(session);
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assert(tech_pvt != NULL);
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switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s CHANNEL EXECUTE\n", switch_channel_get_name(channel));
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return SWITCH_STATUS_SUCCESS;
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}
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static switch_status_t channel_on_destroy(switch_core_session_t *session)
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{
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switch_channel_t *channel = NULL;
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private_t *tech_pvt = NULL;
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void *pop;
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switch_event_t *vars;
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channel = switch_core_session_get_channel(session);
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switch_assert(channel != NULL);
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tech_pvt = switch_core_session_get_private(session);
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if ((vars = (switch_event_t *) switch_channel_get_private(channel, "__loopback_vars__"))) {
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switch_channel_set_private(channel, "__loopback_vars__", NULL);
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switch_event_destroy(&vars);
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}
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if (tech_pvt) {
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switch_core_timer_destroy(&tech_pvt->timer);
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if (switch_core_codec_ready(&tech_pvt->read_codec)) {
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switch_core_codec_destroy(&tech_pvt->read_codec);
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}
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if (switch_core_codec_ready(&tech_pvt->write_codec)) {
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switch_core_codec_destroy(&tech_pvt->write_codec);
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}
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if (tech_pvt->write_frame) {
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switch_frame_free(&tech_pvt->write_frame);
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}
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while (switch_queue_trypop(tech_pvt->frame_queue, &pop) == SWITCH_STATUS_SUCCESS && pop) {
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switch_frame_t *frame = (switch_frame_t *) pop;
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switch_frame_free(&frame);
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}
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}
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return SWITCH_STATUS_SUCCESS;
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}
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static switch_status_t channel_on_hangup(switch_core_session_t *session)
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{
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switch_channel_t *channel = NULL;
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private_t *tech_pvt = NULL;
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channel = switch_core_session_get_channel(session);
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switch_assert(channel != NULL);
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tech_pvt = switch_core_session_get_private(session);
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switch_assert(tech_pvt != NULL);
|
|
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s CHANNEL HANGUP\n", switch_channel_get_name(channel));
|
|
|
|
switch_clear_flag_locked(tech_pvt, TFLAG_LINKED);
|
|
|
|
switch_mutex_lock(tech_pvt->mutex);
|
|
if (tech_pvt->other_tech_pvt) {
|
|
switch_clear_flag_locked(tech_pvt->other_tech_pvt, TFLAG_LINKED);
|
|
tech_pvt->other_tech_pvt = NULL;
|
|
}
|
|
|
|
if (tech_pvt->other_session) {
|
|
switch_channel_hangup(tech_pvt->other_channel, switch_channel_get_cause(channel));
|
|
switch_core_session_rwunlock(tech_pvt->other_session);
|
|
tech_pvt->other_channel = NULL;
|
|
tech_pvt->other_session = NULL;
|
|
}
|
|
switch_mutex_unlock(tech_pvt->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;
|
|
|
|
channel = switch_core_session_get_channel(session);
|
|
switch_assert(channel != NULL);
|
|
|
|
tech_pvt = switch_core_session_get_private(session);
|
|
switch_assert(tech_pvt != NULL);
|
|
|
|
switch (sig) {
|
|
case SWITCH_SIG_BREAK:
|
|
break;
|
|
case SWITCH_SIG_KILL:
|
|
switch_channel_hangup(channel, SWITCH_CAUSE_NORMAL_CLEARING);
|
|
switch_clear_flag_locked(tech_pvt, TFLAG_LINKED);
|
|
switch_mutex_lock(tech_pvt->mutex);
|
|
if (tech_pvt->other_tech_pvt) {
|
|
switch_clear_flag_locked(tech_pvt->other_tech_pvt, TFLAG_LINKED);
|
|
}
|
|
switch_mutex_unlock(tech_pvt->mutex);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s CHANNEL KILL\n", switch_channel_get_name(channel));
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
static switch_status_t channel_on_soft_execute(switch_core_session_t *session)
|
|
{
|
|
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "CHANNEL TRANSMIT\n");
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
static switch_status_t channel_on_exchange_media(switch_core_session_t *session)
|
|
{
|
|
switch_channel_t *channel = NULL;
|
|
private_t *tech_pvt = NULL;
|
|
|
|
channel = switch_core_session_get_channel(session);
|
|
assert(channel != NULL);
|
|
|
|
tech_pvt = switch_core_session_get_private(session);
|
|
assert(tech_pvt != NULL);
|
|
|
|
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "CHANNEL LOOPBACK\n");
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
static switch_status_t channel_on_reset(switch_core_session_t *session)
|
|
{
|
|
private_t *tech_pvt = (private_t *) switch_core_session_get_private(session);
|
|
switch_assert(tech_pvt != NULL);
|
|
|
|
do_reset(tech_pvt);
|
|
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s RESET\n",
|
|
switch_channel_get_name(switch_core_session_get_channel(session)));
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
static switch_status_t channel_on_hibernate(switch_core_session_t *session)
|
|
{
|
|
switch_assert(switch_core_session_get_private(session));
|
|
|
|
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "%s HIBERNATE\n",
|
|
switch_channel_get_name(switch_core_session_get_channel(session)));
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
static switch_status_t channel_on_consume_media(switch_core_session_t *session)
|
|
{
|
|
switch_channel_t *channel = NULL;
|
|
private_t *tech_pvt = NULL;
|
|
|
|
channel = switch_core_session_get_channel(session);
|
|
assert(channel != NULL);
|
|
|
|
tech_pvt = switch_core_session_get_private(session);
|
|
assert(tech_pvt != NULL);
|
|
|
|
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "CHANNEL CONSUME_MEDIA\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 = NULL;
|
|
|
|
tech_pvt = switch_core_session_get_private(session);
|
|
switch_assert(tech_pvt != NULL);
|
|
|
|
if (tech_pvt->other_channel) {
|
|
switch_channel_queue_dtmf(tech_pvt->other_channel, dtmf);
|
|
}
|
|
|
|
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_status_t status = SWITCH_STATUS_FALSE;
|
|
switch_mutex_t *mutex = NULL;
|
|
void *pop = NULL;
|
|
|
|
channel = switch_core_session_get_channel(session);
|
|
switch_assert(channel != NULL);
|
|
|
|
tech_pvt = switch_core_session_get_private(session);
|
|
switch_assert(tech_pvt != NULL);
|
|
|
|
if (!switch_test_flag(tech_pvt, TFLAG_LINKED)) {
|
|
goto end;
|
|
}
|
|
|
|
*frame = NULL;
|
|
|
|
if (!switch_channel_ready(channel)) {
|
|
goto end;
|
|
}
|
|
|
|
switch_core_timer_next(&tech_pvt->timer);
|
|
|
|
mutex = tech_pvt->mutex;
|
|
switch_mutex_lock(mutex);
|
|
|
|
|
|
if (switch_test_flag(tech_pvt, TFLAG_CLEAR)) {
|
|
clear_queue(tech_pvt);
|
|
switch_clear_flag(tech_pvt, TFLAG_CLEAR);
|
|
}
|
|
|
|
if (switch_queue_trypop(tech_pvt->frame_queue, &pop) == SWITCH_STATUS_SUCCESS && pop) {
|
|
if (tech_pvt->write_frame) {
|
|
switch_frame_free(&tech_pvt->write_frame);
|
|
}
|
|
|
|
tech_pvt->write_frame = (switch_frame_t *) pop;
|
|
tech_pvt->write_frame->codec = &tech_pvt->read_codec;
|
|
*frame = tech_pvt->write_frame;
|
|
tech_pvt->packet_count++;
|
|
switch_clear_flag(tech_pvt->write_frame, SFF_CNG);
|
|
tech_pvt->first_cng = 0;
|
|
} else {
|
|
*frame = &tech_pvt->cng_frame;
|
|
tech_pvt->cng_frame.codec = &tech_pvt->read_codec;
|
|
tech_pvt->cng_frame.datalen = tech_pvt->read_codec.implementation->decoded_bytes_per_packet;
|
|
switch_set_flag((&tech_pvt->cng_frame), SFF_CNG);
|
|
if (!tech_pvt->first_cng) {
|
|
switch_yield(tech_pvt->read_codec.implementation->samples_per_packet);
|
|
tech_pvt->first_cng = 1;
|
|
}
|
|
}
|
|
|
|
|
|
if (*frame) {
|
|
status = SWITCH_STATUS_SUCCESS;
|
|
} else {
|
|
status = SWITCH_STATUS_FALSE;
|
|
}
|
|
|
|
end:
|
|
|
|
if (mutex) {
|
|
switch_mutex_unlock(mutex);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
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_channel_t *channel = NULL;
|
|
private_t *tech_pvt = NULL;
|
|
switch_status_t status = SWITCH_STATUS_FALSE;
|
|
|
|
channel = switch_core_session_get_channel(session);
|
|
switch_assert(channel != NULL);
|
|
|
|
tech_pvt = switch_core_session_get_private(session);
|
|
switch_assert(tech_pvt != NULL);
|
|
|
|
if (switch_test_flag(frame, SFF_CNG) ||
|
|
(switch_test_flag(tech_pvt, TFLAG_BOWOUT) && switch_test_flag(tech_pvt, TFLAG_BOWOUT_USED))) {
|
|
switch_core_timer_sync(&tech_pvt->timer);
|
|
switch_core_timer_sync(&tech_pvt->other_tech_pvt->timer);
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
switch_mutex_lock(tech_pvt->mutex);
|
|
if (!switch_test_flag(tech_pvt, TFLAG_BOWOUT) &&
|
|
tech_pvt->other_tech_pvt &&
|
|
switch_test_flag(tech_pvt, TFLAG_BRIDGE) &&
|
|
switch_test_flag(tech_pvt->other_tech_pvt, TFLAG_BRIDGE) &&
|
|
switch_channel_test_flag(tech_pvt->channel, CF_BRIDGED) &&
|
|
switch_channel_test_flag(tech_pvt->other_channel, CF_BRIDGED) &&
|
|
switch_channel_test_flag(tech_pvt->channel, CF_ANSWERED) &&
|
|
switch_channel_test_flag(tech_pvt->other_channel, CF_ANSWERED) && --tech_pvt->bowout_frame_count <= 0) {
|
|
const char *a_uuid = switch_channel_get_variable(channel, SWITCH_SIGNAL_BOND_VARIABLE);
|
|
const char *b_uuid = switch_channel_get_variable(tech_pvt->other_channel, SWITCH_SIGNAL_BOND_VARIABLE);
|
|
const char *vetoa, *vetob;
|
|
|
|
|
|
vetoa = switch_channel_get_variable(tech_pvt->channel, "loopback_bowout");
|
|
vetob = switch_channel_get_variable(tech_pvt->other_tech_pvt->channel, "loopback_bowout");
|
|
|
|
if ((!vetoa || switch_true(vetoa)) && (!vetob || switch_true(vetob))) {
|
|
switch_core_session_t *br_a, *br_b;
|
|
switch_channel_t *ch_a = NULL, *ch_b = NULL;
|
|
int good_to_go = 0;
|
|
|
|
if ((br_a = switch_core_session_locate(a_uuid))) {
|
|
ch_a = switch_core_session_get_channel(br_a);
|
|
}
|
|
|
|
if ((br_b = switch_core_session_locate(b_uuid))) {
|
|
ch_b = switch_core_session_get_channel(br_b);
|
|
}
|
|
|
|
if (ch_a && ch_b && switch_channel_test_flag(ch_a, CF_BRIDGED) && switch_channel_test_flag(ch_b, CF_BRIDGED)) {
|
|
switch_set_flag_locked(tech_pvt, TFLAG_BOWOUT);
|
|
switch_set_flag_locked(tech_pvt->other_tech_pvt, TFLAG_BOWOUT);
|
|
|
|
switch_clear_flag_locked(tech_pvt, TFLAG_WRITE);
|
|
switch_clear_flag_locked(tech_pvt->other_tech_pvt, TFLAG_WRITE);
|
|
|
|
switch_set_flag_locked(tech_pvt, TFLAG_BOWOUT_USED);
|
|
switch_set_flag_locked(tech_pvt->other_tech_pvt, TFLAG_BOWOUT_USED);
|
|
|
|
if (a_uuid && b_uuid) {
|
|
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG,
|
|
"%s detected bridge on both ends, attempting direct connection.\n", switch_channel_get_name(channel));
|
|
|
|
/* channel_masquerade eat your heart out....... */
|
|
switch_ivr_uuid_bridge(a_uuid, b_uuid);
|
|
good_to_go = 1;
|
|
switch_mutex_unlock(tech_pvt->mutex);
|
|
}
|
|
}
|
|
|
|
if (br_a) switch_core_session_rwunlock(br_a);
|
|
if (br_b) switch_core_session_rwunlock(br_b);
|
|
|
|
if (good_to_go) {
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
if (switch_test_flag(tech_pvt, TFLAG_LINKED) && tech_pvt->other_tech_pvt) {
|
|
switch_frame_t *clone;
|
|
|
|
if (frame->codec->implementation != tech_pvt->write_codec.implementation) {
|
|
/* change codecs to match */
|
|
tech_init(tech_pvt, session, frame->codec);
|
|
tech_init(tech_pvt->other_tech_pvt, tech_pvt->other_session, frame->codec);
|
|
}
|
|
|
|
|
|
if (switch_frame_dup(frame, &clone) != SWITCH_STATUS_SUCCESS) {
|
|
abort();
|
|
}
|
|
|
|
if ((status = switch_queue_trypush(tech_pvt->other_tech_pvt->frame_queue, clone)) != SWITCH_STATUS_SUCCESS) {
|
|
clear_queue(tech_pvt->other_tech_pvt);
|
|
status = switch_queue_trypush(tech_pvt->other_tech_pvt->frame_queue, clone);
|
|
}
|
|
|
|
if (status == SWITCH_STATUS_SUCCESS) {
|
|
switch_set_flag_locked(tech_pvt->other_tech_pvt, TFLAG_WRITE);
|
|
} else {
|
|
switch_frame_free(&clone);
|
|
}
|
|
|
|
status = SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
switch_mutex_unlock(tech_pvt->mutex);
|
|
|
|
return status;
|
|
}
|
|
|
|
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;
|
|
int done = 1, pass = 0;
|
|
|
|
channel = switch_core_session_get_channel(session);
|
|
switch_assert(channel != NULL);
|
|
|
|
tech_pvt = switch_core_session_get_private(session);
|
|
switch_assert(tech_pvt != NULL);
|
|
|
|
switch (msg->message_id) {
|
|
case SWITCH_MESSAGE_INDICATE_ANSWER:
|
|
if (tech_pvt->other_channel && !switch_test_flag(tech_pvt, TFLAG_OUTBOUND)) {
|
|
switch_channel_mark_answered(tech_pvt->other_channel);
|
|
}
|
|
break;
|
|
case SWITCH_MESSAGE_INDICATE_PROGRESS:
|
|
if (tech_pvt->other_channel && !switch_test_flag(tech_pvt, TFLAG_OUTBOUND)) {
|
|
switch_channel_mark_pre_answered(tech_pvt->other_channel);
|
|
}
|
|
break;
|
|
case SWITCH_MESSAGE_INDICATE_RINGING:
|
|
if (tech_pvt->other_channel && !switch_test_flag(tech_pvt, TFLAG_OUTBOUND)) {
|
|
switch_channel_mark_ring_ready(tech_pvt->other_channel);
|
|
}
|
|
break;
|
|
case SWITCH_MESSAGE_INDICATE_BRIDGE:
|
|
{
|
|
switch_set_flag_locked(tech_pvt, TFLAG_BRIDGE);
|
|
}
|
|
break;
|
|
case SWITCH_MESSAGE_INDICATE_UNBRIDGE:
|
|
{
|
|
switch_clear_flag_locked(tech_pvt, TFLAG_BRIDGE);
|
|
}
|
|
break;
|
|
default:
|
|
done = 0;
|
|
break;
|
|
}
|
|
|
|
switch (msg->message_id) {
|
|
case SWITCH_MESSAGE_INDICATE_BRIDGE:
|
|
case SWITCH_MESSAGE_INDICATE_UNBRIDGE:
|
|
case SWITCH_MESSAGE_INDICATE_AUDIO_SYNC:
|
|
{
|
|
|
|
done = 1;
|
|
switch_set_flag(tech_pvt, TFLAG_CLEAR);
|
|
switch_set_flag(tech_pvt->other_tech_pvt, TFLAG_CLEAR);
|
|
|
|
switch_core_timer_sync(&tech_pvt->timer);
|
|
switch_core_timer_sync(&tech_pvt->other_tech_pvt->timer);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
|
|
switch (msg->message_id) {
|
|
case SWITCH_MESSAGE_INDICATE_DISPLAY:
|
|
{
|
|
|
|
if (!zstr(msg->string_array_arg[0])) {
|
|
switch_channel_set_profile_var(tech_pvt->other_channel, "callee_id_name", msg->string_array_arg[0]);
|
|
}
|
|
|
|
if (!zstr(msg->string_array_arg[1])) {
|
|
switch_channel_set_profile_var(tech_pvt->other_channel, "callee_id_number", msg->string_array_arg[1]);
|
|
}
|
|
|
|
pass = 1;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
|
|
if (!done && tech_pvt->other_session && (pass || switch_test_flag(tech_pvt, TFLAG_RUNNING_APP))) {
|
|
switch_status_t r = SWITCH_STATUS_FALSE;
|
|
switch_core_session_t *other_session;
|
|
|
|
if (switch_core_session_get_partner(tech_pvt->other_session, &other_session) == SWITCH_STATUS_SUCCESS) {
|
|
r = switch_core_session_receive_message(other_session, msg);
|
|
switch_core_session_rwunlock(other_session);
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
static switch_status_t loopback_bowout_on_execute_state_handler(switch_core_session_t *session)
|
|
{
|
|
switch_channel_t *channel = switch_core_session_get_channel(session);
|
|
switch_channel_state_t state = switch_channel_get_state(channel);
|
|
private_t *tech_pvt = NULL;
|
|
|
|
|
|
if (state == CS_EXECUTE) {
|
|
const char *uuid;
|
|
switch_core_session_t *other_session = NULL;
|
|
switch_channel_t *b_channel = NULL;
|
|
|
|
tech_pvt = switch_core_session_get_private(session);
|
|
|
|
switch_core_session_read_lock(tech_pvt->other_session);
|
|
b_channel = switch_core_session_get_channel(tech_pvt->other_session);
|
|
|
|
/* Wait for b_channel to be fully bridged */
|
|
switch_channel_wait_for_flag(b_channel, CF_BRIDGED, SWITCH_TRUE, 5000, NULL);
|
|
|
|
uuid = switch_channel_get_variable(b_channel, SWITCH_SIGNAL_BOND_VARIABLE);
|
|
|
|
if (uuid && (other_session = switch_core_session_locate(uuid))) {
|
|
switch_channel_t *other_channel = switch_core_session_get_channel(other_session);
|
|
switch_caller_profile_t *cp, *clone;
|
|
|
|
switch_channel_wait_for_state(other_channel, NULL, CS_EXCHANGE_MEDIA);
|
|
|
|
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(tech_pvt->other_session), SWITCH_LOG_INFO, "Replacing loopback channel: %s with real channel: %s\n",
|
|
switch_channel_get_name(b_channel), switch_channel_get_name(other_channel));
|
|
|
|
if ((cp = switch_channel_get_caller_profile(channel))) {
|
|
clone = switch_caller_profile_clone(other_session, cp);
|
|
clone->originator_caller_profile = NULL;
|
|
clone->originatee_caller_profile = NULL;
|
|
switch_channel_set_caller_profile(other_channel, clone);
|
|
}
|
|
|
|
switch_channel_caller_extension_masquerade(channel, other_channel, 0);
|
|
switch_channel_set_state(other_channel, CS_RESET);
|
|
switch_channel_wait_for_state(other_channel, NULL, CS_RESET);
|
|
switch_channel_set_variable(channel, "process_cdr", "false");
|
|
switch_channel_set_variable(b_channel, "process_cdr", "false");
|
|
switch_channel_hangup(channel, SWITCH_CAUSE_NORMAL_CLEARING);
|
|
switch_channel_set_state(other_channel, CS_EXECUTE);
|
|
switch_core_session_rwunlock(other_session);
|
|
}
|
|
|
|
switch_core_session_rwunlock(tech_pvt->other_session);
|
|
|
|
switch_core_event_hook_remove_state_change(session, loopback_bowout_on_execute_state_handler);
|
|
|
|
}
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
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 name[128];
|
|
|
|
if (session) {
|
|
switch_channel_t *channel = switch_core_session_get_channel(session);
|
|
switch_channel_clear_flag(channel, CF_PROXY_MEDIA);
|
|
switch_channel_clear_flag(channel, CF_PROXY_MODE);
|
|
switch_channel_pre_answer(channel);
|
|
}
|
|
|
|
if ((*new_session = switch_core_session_request(loopback_endpoint_interface, SWITCH_CALL_DIRECTION_OUTBOUND, flags, pool)) != 0) {
|
|
private_t *tech_pvt;
|
|
switch_channel_t *channel;
|
|
switch_caller_profile_t *caller_profile;
|
|
switch_event_t *clone = NULL;
|
|
|
|
switch_core_session_add_stream(*new_session, NULL);
|
|
|
|
if ((tech_pvt = (private_t *) switch_core_session_alloc(*new_session, sizeof(private_t))) != 0) {
|
|
channel = switch_core_session_get_channel(*new_session);
|
|
switch_snprintf(name, sizeof(name), "loopback/%s-a", outbound_profile->destination_number);
|
|
switch_channel_set_name(channel, name);
|
|
if (tech_init(tech_pvt, *new_session, session ? switch_core_session_get_read_codec(session) : NULL) != SWITCH_STATUS_SUCCESS) {
|
|
switch_core_session_destroy(new_session);
|
|
return SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER;
|
|
}
|
|
} else {
|
|
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(*new_session), SWITCH_LOG_CRIT, "Hey where is my memory pool?\n");
|
|
switch_core_session_destroy(new_session);
|
|
return SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER;
|
|
}
|
|
|
|
if (switch_event_dup(&clone, var_event) == SWITCH_STATUS_SUCCESS) {
|
|
switch_channel_set_private(channel, "__loopback_vars__", clone);
|
|
}
|
|
|
|
if (outbound_profile) {
|
|
char *dialplan = NULL, *context = NULL;
|
|
|
|
caller_profile = switch_caller_profile_clone(*new_session, outbound_profile);
|
|
caller_profile->source = switch_core_strdup(caller_profile->pool, modname);
|
|
if (!strncasecmp(caller_profile->destination_number, "app=", 4)) {
|
|
char *dest = switch_core_session_strdup(*new_session, caller_profile->destination_number);
|
|
char *app = dest + 4;
|
|
char *arg = NULL;
|
|
|
|
if ((arg = strchr(app, ':'))) {
|
|
*arg++ = '\0';
|
|
}
|
|
|
|
switch_channel_set_variable(channel, "loopback_app", app);
|
|
|
|
if (clone) {
|
|
switch_event_add_header_string(clone, SWITCH_STACK_BOTTOM, "loopback_app", app);
|
|
}
|
|
|
|
if (arg) {
|
|
switch_channel_set_variable(channel, "loopback_app_arg", arg);
|
|
if (clone) {
|
|
switch_event_add_header_string(clone, SWITCH_STACK_BOTTOM, "loopback_app_arg", arg);
|
|
}
|
|
}
|
|
|
|
switch_set_flag(tech_pvt, TFLAG_APP);
|
|
|
|
caller_profile->destination_number = switch_core_strdup(caller_profile->pool, app);
|
|
}
|
|
|
|
if ((context = strchr(caller_profile->destination_number, '/'))) {
|
|
*context++ = '\0';
|
|
|
|
if ((dialplan = strchr(context, '/'))) {
|
|
*dialplan++ = '\0';
|
|
}
|
|
|
|
if (!zstr(context)) {
|
|
caller_profile->context = switch_core_strdup(caller_profile->pool, context);
|
|
}
|
|
|
|
if (!zstr(dialplan)) {
|
|
caller_profile->dialplan = switch_core_strdup(caller_profile->pool, dialplan);
|
|
}
|
|
}
|
|
|
|
if (zstr(caller_profile->context)) {
|
|
caller_profile->context = switch_core_strdup(caller_profile->pool, "default");
|
|
}
|
|
|
|
if (zstr(caller_profile->dialplan)) {
|
|
caller_profile->dialplan = switch_core_strdup(caller_profile->pool, "xml");
|
|
}
|
|
|
|
switch_snprintf(name, sizeof(name), "loopback/%s-a", caller_profile->destination_number);
|
|
switch_channel_set_name(channel, name);
|
|
switch_set_flag_locked(tech_pvt, TFLAG_OUTBOUND);
|
|
switch_channel_set_caller_profile(channel, caller_profile);
|
|
tech_pvt->caller_profile = caller_profile;
|
|
} else {
|
|
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(*new_session), SWITCH_LOG_ERROR, "Doh! no caller profile\n");
|
|
switch_core_session_destroy(new_session);
|
|
return SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER;
|
|
}
|
|
|
|
if (switch_true(switch_event_get_header(var_event, "loopback_bowout_on_execute"))) {
|
|
switch_core_event_hook_add_state_change(*new_session, loopback_bowout_on_execute_state_handler);
|
|
}
|
|
|
|
switch_channel_set_state(channel, CS_INIT);
|
|
|
|
return SWITCH_CAUSE_SUCCESS;
|
|
}
|
|
|
|
return SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER;
|
|
}
|
|
|
|
static switch_state_handler_table_t channel_event_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 */ channel_on_consume_media,
|
|
/*.on_hibernate */ channel_on_hibernate,
|
|
/*.on_reset */ channel_on_reset,
|
|
/*.on_park */ NULL,
|
|
/*.on_reporting */ NULL,
|
|
/*.on_destroy */ channel_on_destroy
|
|
};
|
|
|
|
static switch_io_routines_t channel_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
|
|
};
|
|
|
|
SWITCH_MODULE_LOAD_FUNCTION(mod_loopback_load)
|
|
{
|
|
|
|
memset(&globals, 0, sizeof(globals));
|
|
|
|
/* connect my internal structure to the blank pointer passed to me */
|
|
*module_interface = switch_loadable_module_create_module_interface(pool, modname);
|
|
loopback_endpoint_interface = switch_loadable_module_create_interface(*module_interface, SWITCH_ENDPOINT_INTERFACE);
|
|
loopback_endpoint_interface->interface_name = "loopback";
|
|
loopback_endpoint_interface->io_routines = &channel_io_routines;
|
|
loopback_endpoint_interface->state_handler = &channel_event_handlers;
|
|
|
|
/* indicate that the module should continue to be loaded */
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_loopback_shutdown)
|
|
{
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
/* For Emacs:
|
|
* Local Variables:
|
|
* mode:c
|
|
* indent-tabs-mode:t
|
|
* tab-width:4
|
|
* c-basic-offset:4
|
|
* End:
|
|
* For VIM:
|
|
* vim:set softtabstop=4 shiftwidth=4 tabstop=4:
|
|
*/
|