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freeswitch/src/mod/applications/mod_esf/mod_esf.c

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/*
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
* Copyright (C) 2005/2006, Anthony Minessale II <anthmct@yahoo.com>
*
* 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 <anthmct@yahoo.com>
* Portions created by the Initial Developer are Copyright (C)
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Anthony Minessale II <anthmct@yahoo.com>
*
*
* mod_esf.c -- Extra SIP Functionality
*
*/
#include <switch.h>
SWITCH_MODULE_LOAD_FUNCTION(mod_esf_load);
SWITCH_MODULE_DEFINITION(mod_esf, mod_esf_load, NULL, NULL);
struct ls_control_packet {
uint32_t unique_id;
uint32_t command;
uint32_t ip;
uint32_t port;
};
typedef struct ls_control_packet ls_control_packet_t;
typedef enum {
LS_START_BCAST = 6,
LS_STOP_BCAST = 7
} ls_command_t;
typedef enum {
SEND_TYPE_UNKNOWN = 0,
SEND_TYPE_RTP = 1,
SEND_TYPE_RAW = 2,
SEND_TYPE_NOMEDIA = 3
} ls_how_t;
SWITCH_STANDARD_APP(bcast_function)
{
switch_channel_t *channel = switch_core_session_get_channel(session);
switch_socket_t *socket;
switch_sockaddr_t *audio_addr = NULL, *control_packet_addr;
switch_frame_t *read_frame;
switch_status_t status;
switch_size_t bytes;
ls_control_packet_t control_packet;
switch_codec_t codec = { 0}, *read_codec, *orig_codec = NULL;
uint32_t flags = 0;
const char *err;
switch_rtp_t *rtp_session = NULL;
switch_port_t rtp_port;
char guess_ip[25];
ls_how_t ready = SEND_TYPE_UNKNOWN;
int argc;
char *mydata, *argv[5];
char *mcast_ip = "224.168.168.168";
switch_port_t mcast_port = 34567;
switch_port_t mcast_control_port = 6061;
char *mcast_port_str = "34567";
if (!switch_strlen_zero((char *) data)) {
mydata = switch_core_session_strdup(session, data);
assert(mydata != NULL);
argc = switch_separate_string(mydata, ' ', argv, (sizeof(argv) / sizeof(argv[0])));
if (!switch_strlen_zero(argv[0])) {
mcast_ip = argv[0];
}
if (!switch_strlen_zero(argv[1])) {
mcast_port_str = argv[1];
mcast_port = (switch_port_t)atoi(mcast_port_str);
}
if (!switch_strlen_zero(argv[2])) {
mcast_control_port = (switch_port_t)atoi(argv[2]);
}
}
if (switch_true(switch_channel_get_variable(channel, SWITCH_BYPASS_MEDIA_VARIABLE))) {
switch_core_session_message_t msg = { 0 };
ready = SEND_TYPE_NOMEDIA;
switch_channel_set_variable(channel, SWITCH_REMOTE_MEDIA_IP_VARIABLE, mcast_ip);
switch_channel_set_variable(channel, SWITCH_REMOTE_MEDIA_PORT_VARIABLE, mcast_port_str);
/* special answer with the mcast addr */
msg.from = __FILE__;
msg.string_arg = "recvonly";
msg.message_id = SWITCH_MESSAGE_INDICATE_BROADCAST;
switch_core_session_receive_message(session, &msg);
} else {
switch_channel_answer(channel);
}
read_codec = switch_core_session_get_read_codec(session);
if (switch_socket_create(&socket, AF_INET, SOCK_DGRAM, 0, switch_core_session_get_pool(session)) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Socket Error 1\n");
goto fail;
}
if (switch_sockaddr_info_get(&control_packet_addr, mcast_ip, SWITCH_UNSPEC,
mcast_control_port, 0, switch_core_session_get_pool(session)) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Socket Error 3\n");
goto fail;
}
while(!ready) {
status = switch_core_session_read_frame(session, &read_frame, -1, 0);
if (read_frame && switch_test_flag(read_frame, SFF_CNG)) {
continue;
}
if (!SWITCH_READ_ACCEPTABLE(status) || !read_frame) {
goto fail;
}
if (read_frame->packet && read_frame->packetlen && read_codec->implementation->ianacode == 0) {
ready = SEND_TYPE_RAW;
} else {
ready = SEND_TYPE_RTP;
}
}
if (ready == SEND_TYPE_RTP) {
if (read_codec->implementation->ianacode != 0) {
if (switch_core_codec_init(&codec,
"PCMU",
NULL,
8000,
20,
1, SWITCH_CODEC_FLAG_ENCODE | SWITCH_CODEC_FLAG_DECODE,
NULL, switch_core_session_get_pool(session)) == SWITCH_STATUS_SUCCESS) {
orig_codec = read_codec;
read_codec = &codec;
switch_core_session_set_read_codec(session, read_codec);
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Codec Activation Success\n");
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Codec Activation Fail\n");
goto fail;
}
}
switch_find_local_ip(guess_ip, sizeof(guess_ip), AF_INET);
if (!(rtp_port = switch_rtp_request_port(guess_ip))) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "RTP Port Error\n");
goto fail;
}
rtp_session = switch_rtp_new(guess_ip,
rtp_port,
mcast_ip,
mcast_port,
read_codec->implementation->ianacode,
read_codec->implementation->samples_per_frame,
read_codec->implementation->microseconds_per_frame,
(switch_rtp_flag_t) flags,
"soft", &err, switch_core_session_get_pool(session));
if (!switch_rtp_ready(rtp_session)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "RTP Error\n");
goto fail;
}
} else if (ready == SEND_TYPE_NOMEDIA) {
switch_yield(10000);
} else if (ready == SEND_TYPE_RAW) {
if (switch_sockaddr_info_get(&audio_addr, mcast_ip, SWITCH_UNSPEC, mcast_port, 0, switch_core_session_get_pool(session)) != SWITCH_STATUS_SUCCESS) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Socket Error 2\n");
goto fail;
}
}
control_packet.unique_id = htonl((u_long)switch_timestamp(NULL));
control_packet.command = htonl(LS_START_BCAST);
control_packet.ip = inet_addr(mcast_ip);
control_packet.port = htonl(mcast_port);
bytes = 16;
switch_socket_sendto(socket, control_packet_addr, 0, (void *)&control_packet, &bytes);
bytes = 16;
switch_socket_sendto(socket, control_packet_addr, 0, (void *)&control_packet, &bytes);
for(;;) {
status = switch_core_session_read_frame(session, &read_frame, -1, 0);
if (!SWITCH_READ_ACCEPTABLE(status)) {
break;
}
if (switch_test_flag(read_frame, SFF_CNG)) {
continue;
}
if (ready == SEND_TYPE_RTP) {
switch_rtp_write_frame(rtp_session, read_frame);
} else {
bytes = read_frame->packetlen;
switch_socket_sendto(socket, audio_addr, 0, read_frame->packet, &bytes);
}
}
control_packet.unique_id = htonl((u_long)switch_timestamp(NULL));
control_packet.command = htonl(LS_STOP_BCAST);
bytes = 8;
switch_socket_sendto(socket, control_packet_addr, 0, (void *)&control_packet, &bytes);
bytes = 8;
switch_socket_sendto(socket, control_packet_addr, 0, (void *)&control_packet, &bytes);
fail:
if (orig_codec) {
switch_core_session_set_read_codec(session, orig_codec);
switch_core_codec_destroy(&codec);
}
if (rtp_session && ready == SEND_TYPE_RTP && switch_rtp_ready(rtp_session)) {
switch_rtp_destroy(&rtp_session);
}
if (socket) {
switch_socket_close(socket);
}
return;
}
SWITCH_MODULE_LOAD_FUNCTION(mod_esf_load)
{
switch_application_interface_t *app_interface;
/* connect my internal structure to the blank pointer passed to me */
*module_interface = switch_loadable_module_create_module_interface(pool, modname);
SWITCH_ADD_APP(app_interface, "esf_page_group", NULL, NULL, bcast_function, NULL, SAF_NONE);
/* indicate that the module should continue to be loaded */
return SWITCH_STATUS_SUCCESS;
}
/* For Emacs:
* Local Variables:
* mode:c
* indent-tabs-mode:nil
* tab-width:4
* c-basic-offset:4
* End:
* For VIM:
* vim:set softtabstop=4 shiftwidth=4 tabstop=4 expandtab:
*/
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