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/**
* @file echo.c Echo module
*/
#include <re.h>
#include <baresip.h>
/**
*
* Multi Call Echo module
*
* REQUIRES: aubridge
* NOTE: This module is experimental.
*
*/
struct session {
struct le le;
struct call *call_in;
};
static struct list sessionl;
static void destructor(void *arg)
{
struct session *sess = arg;
debug("echo: session destroyed (in=%p)\n",
sess->call_in);
list_unlink(&sess->le);
mem_deref(sess->call_in);
}
static void call_event_handler(struct call *call, enum call_event ev,
const char *str, void *arg)
{
struct session *sess = arg;
switch (ev) {
case CALL_EVENT_CLOSED:
debug("echo: CALL_CLOSED: %s\n", str);
mem_deref(sess);
break;
default:
break;
}
}
static void call_dtmf_handler(struct call *call, char key, void *arg)
{
(void)arg;
debug("echo: relaying DTMF event: key = '%c'\n", key ? key : '.');
call_send_digit(call, key);
}
static int new_session(struct call *call)
{
struct session *sess;
char a[64];
int err = 0;
sess = mem_zalloc(sizeof(*sess), destructor);
if (!sess)
return ENOMEM;
sess->call_in = call;
re_snprintf(a, sizeof(a), "A-%x", sess);
audio_set_devicename(call_audio(sess->call_in), a, a);
call_set_handlers(sess->call_in, call_event_handler,
call_dtmf_handler, sess);
list_append(&sessionl, &sess->le, sess);
ua_answer(uag_current(), NULL);
if (err)
mem_deref(sess);
return err;
}
static void ua_event_handler(struct ua *ua, enum ua_event ev,
struct call *call, const char *prm, void *arg)
{
int err;
(void)prm;
(void)arg;
switch (ev) {
case UA_EVENT_CALL_INCOMING:
debug("echo: CALL_INCOMING: peer=%s --> local=%s\n",
call_peeruri(call),
call_localuri(call));
err = new_session(call);
if (err) {
ua_hangup(ua, call, 500, "Server Error");
}
break;
default:
break;
}
}
static int module_init(void)
{
int err;
list_init(&sessionl);
err = uag_event_register(ua_event_handler, 0);
if (err)
return err;
debug("echo: module loaded\n");
return 0;
}
static int module_close(void)
{
debug("echo: module closing..\n");
if (!list_isempty(&sessionl)) {
info("echo: flushing %u sessions\n", list_count(&sessionl));
list_flush(&sessionl);
}
uag_event_unregister(ua_event_handler);
return 0;
}
const struct mod_export DECL_EXPORTS(echo) = {
"echo",
"application",
module_init,
module_close
};
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