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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2013, Digium, Inc.
*
* Jonathan Rose <jrose@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Parking Core
*
* \author Jonathan Rose <jrose@digium.com>
*/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/_private.h"
#include "asterisk/astobj2.h"
#include "asterisk/pbx.h"
#include "asterisk/bridging.h"
#include "asterisk/parking.h"
#include "asterisk/channel.h"
#include "asterisk/_private.h"
/*! \brief Message type for parked calls */
STASIS_MESSAGE_TYPE_DEFN(ast_parked_call_type);
/*! \brief Topic for parking lots */
static struct stasis_topic *parking_topic;
/*! \brief Function Callback for handling blind transfers to park applications */
static ast_park_blind_xfer_fn ast_park_blind_xfer_func = NULL;
/*! \brief Function Callback for handling a bridge channel trying to park itself */
static ast_bridge_channel_park_fn ast_bridge_channel_park_func = NULL;
static void parking_stasis_cleanup(void)
{
STASIS_MESSAGE_TYPE_CLEANUP(ast_parked_call_type);
ao2_cleanup(parking_topic);
parking_topic = NULL;
}
int ast_parking_stasis_init(void)
{
if (STASIS_MESSAGE_TYPE_INIT(ast_parked_call_type)) {
return -1;
}
parking_topic = stasis_topic_create("ast_parking");
if (!parking_topic) {
return -1;
}
ast_register_cleanup(parking_stasis_cleanup);
return 0;
}
struct stasis_topic *ast_parking_topic(void)
{
return parking_topic;
}
/*! \brief Destructor for parked_call_payload objects */
static void parked_call_payload_destructor(void *obj)
{
struct ast_parked_call_payload *park_obj = obj;
ao2_cleanup(park_obj->parkee);
ao2_cleanup(park_obj->retriever);
ast_string_field_free_memory(park_obj);
}
struct ast_parked_call_payload *ast_parked_call_payload_create(enum ast_parked_call_event_type event_type,
struct ast_channel_snapshot *parkee_snapshot, const char *parker_dial_string,
struct ast_channel_snapshot *retriever_snapshot, const char *parkinglot,
unsigned int parkingspace, unsigned long int timeout,
unsigned long int duration)
{
RAII_VAR(struct ast_parked_call_payload *, payload, NULL, ao2_cleanup);
payload = ao2_alloc(sizeof(*payload), parked_call_payload_destructor);
if (!payload) {
return NULL;
}
if (ast_string_field_init(payload, 32)) {
return NULL;
}
payload->event_type = event_type;
ao2_ref(parkee_snapshot, +1);
payload->parkee = parkee_snapshot;
if (retriever_snapshot) {
ao2_ref(retriever_snapshot, +1);
payload->retriever = retriever_snapshot;
}
if (parkinglot) {
ast_string_field_set(payload, parkinglot, parkinglot);
}
if (parker_dial_string) {
ast_string_field_set(payload, parker_dial_string, parker_dial_string);
}
payload->parkingspace = parkingspace;
payload->timeout = timeout;
payload->duration = duration;
/* Bump the ref count by one since RAII_VAR is going to eat one when we leave. */
ao2_ref(payload, +1);
return payload;
}
void ast_install_park_blind_xfer_func(ast_park_blind_xfer_fn park_blind_xfer_func)
{
ast_park_blind_xfer_func = park_blind_xfer_func;
}
void ast_install_bridge_channel_park_func(ast_bridge_channel_park_fn bridge_channel_park_func)
{
ast_bridge_channel_park_func = bridge_channel_park_func;
}
void ast_uninstall_park_blind_xfer_func(void)
{
ast_park_blind_xfer_func = NULL;
}
void ast_uninstall_bridge_channel_park_func(void)
{
ast_bridge_channel_park_func = NULL;
}
int ast_park_blind_xfer(struct ast_bridge *bridge, struct ast_bridge_channel *parker,
struct ast_exten *park_exten)
{
static int warned = 0;
if (ast_park_blind_xfer_func) {
return ast_park_blind_xfer_func(bridge, parker, park_exten);
}
if (warned++ % 10 == 0) {
ast_verb(3, "%s attempted to blind transfer to a parking extension, but no parking blind transfer function is loaded.\n",
ast_channel_name(parker->chan));
}
return -1;
}
struct ast_exten *ast_get_parking_exten(const char *exten_str, struct ast_channel *chan, const char *context)
{
struct ast_exten *exten;
struct pbx_find_info q = { .stacklen = 0 }; /* the rest is reset in pbx_find_extension */
const char *app_at_exten;
ast_debug(4, "Checking if %s@%s is a parking exten\n", exten_str, context);
exten = pbx_find_extension(chan, NULL, &q, context, exten_str, 1, NULL, NULL,
E_MATCH);
if (!exten) {
return NULL;
}
app_at_exten = ast_get_extension_app(exten);
if (!app_at_exten || strcasecmp(PARK_APPLICATION, app_at_exten)) {
return NULL;
}
return exten;
}
void ast_bridge_channel_park(struct ast_bridge_channel *bridge_channel, const char *parkee_uuid, const char *parker_uuid, const char *app_data)
{
/* Run installable function */
if (ast_bridge_channel_park_func) {
return ast_bridge_channel_park_func(bridge_channel, parkee_uuid, parker_uuid, app_data);
}
}
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