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/*************************************************************************/
/* Copyright (c) 2014, Aaron Herting 'qwertos' <aaron@herting.cc> */
/* Based upon code licensed under the same license by Creytiv.com */
/* */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following conditions */
/* are met: */
/* */
/* 1. Redistributions of source code must retain the above copyright */
/* notice, this list of conditions and the following disclaimer. */
/* */
/* 2. Redistributions in binary form must reproduce the above copyright */
/* notice, this list of conditions and the following disclaimer in the */
/* documentation and/or other materials provided with the distribution. */
/* */
/* 3. Neither the name of the copyright holder nor the names of its */
/* contributors may be used to endorse or promote products derived from */
/* this software without specific prior written permission. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */
/* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT */
/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR */
/* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT */
/* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, */
/* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, */
/* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS */
/* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED */
/* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT */
/* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY */
/* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE */
/* POSSIBILITY OF SUCH DAMAGE. */
/*************************************************************************/
/**
* @defgroup dtmfio dtmfio
*
* DTMF input/output module
*
*
* # DTMFIO Module
*
* ## Description
*
* Writes received dtmf button presses to a FIFO located at /tmp/dtmf.out.
*
* Also, will write an 'E' when a call is established and an 'F' when the
* call is finished.
*
* ## To Do
*
* + Proper error handling
* + Using a dtmf.in file, be able to send DTMF signals
* + Use a filename specified by the user in the config file
* + Clean up build output so there aren't errors regarding unused vars
*/
#include <unistd.h>
#include <stdio.h>
#include <re.h>
#include <baresip.h>
#include <sys/types.h>
#include <sys/stat.h>
static FILE *fd;
static const char *DTMF_OUT = "/tmp/dtmf.out";
static void dtmf_handler(struct call *call, char key, void *arg)
{
(void)call;
(void)arg;
if ( key != 0 ) {
fprintf(fd, "%c", key);
fflush(fd);
}
}
static void ua_event_handler(struct ua *ua,
enum ua_event ev,
struct call *call,
const char *prm,
void *arg )
{
(void)ua;
(void)prm;
(void)arg;
if ( ev == UA_EVENT_CALL_ESTABLISHED ) {
fprintf(fd, "E");
fflush(fd);
call_set_handlers( call, NULL, dtmf_handler, NULL);
}
if (ev == UA_EVENT_CALL_CLOSED ) {
fprintf(fd, "F");
fflush(fd);
}
}
static int module_init(void)
{
if ( mkfifo( DTMF_OUT, S_IWUSR | S_IRUSR ) ) {
int err = errno;
warning("Creation of the FIFO errored."
" This might cause issues. (%m)\n", err);
return err;
}
fd = fopen( DTMF_OUT , "w+" );
if ( fd == 0 ){
warning("Opening of the FIFO errored."
" This might cause issues.\n");
}
uag_event_register( ua_event_handler, NULL );
return 0;
}
static int module_close(void)
{
uag_event_unregister(ua_event_handler);
if (fd) {
fclose(fd);
fd = NULL;
}
unlink(DTMF_OUT);
return 0;
}
const struct mod_export DECL_EXPORTS(dtmfio) = {
"dtmfio",
"application",
module_init,
module_close
};
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