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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2013 Digium, Inc.
*
* Richard Mudgett <rmudgett@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 Basic bridge class. It is a subclass of struct ast_bridge.
*
* \author Richard Mudgett <rmudgett@digium.com>
*
* See Also:
* \arg \ref AstCREDITS
*/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/channel.h"
#include "asterisk/utils.h"
#include "asterisk/linkedlists.h"
#include "asterisk/bridging.h"
#include "asterisk/bridging_basic.h"
#include "asterisk/astobj2.h"
/* ------------------------------------------------------------------- */
static const struct ast_datastore_info dtmf_features_info = {
.type = "bridge-dtmf-features",
.destroy = ast_free_ptr,
};
int ast_bridge_features_ds_set(struct ast_channel *chan, struct ast_flags *flags)
{
struct ast_datastore *datastore;
struct ast_flags *ds_flags;
datastore = ast_channel_datastore_find(chan, &dtmf_features_info, NULL);
if (datastore) {
ds_flags = datastore->data;
*ds_flags = *flags;
return 0;
}
datastore = ast_datastore_alloc(&dtmf_features_info, NULL);
if (!datastore) {
return -1;
}
ds_flags = ast_malloc(sizeof(*ds_flags));
if (!ds_flags) {
ast_datastore_free(datastore);
return -1;
}
*ds_flags = *flags;
datastore->data = ds_flags;
ast_channel_datastore_add(chan, datastore);
return 0;
}
struct ast_flags *ast_bridge_features_ds_get(struct ast_channel *chan)
{
struct ast_datastore *datastore;
datastore = ast_channel_datastore_find(chan, &dtmf_features_info, NULL);
if (!datastore) {
return NULL;
}
return datastore->data;
}
/*!
* \internal
* \brief Determine if we should dissolve the bridge from a hangup.
* \since 12.0.0
*
* \param bridge The bridge that the channel is part of
* \param bridge_channel Channel executing the feature
* \param hook_pvt Private data passed in when the hook was created
*
* \retval 0 Keep the callback hook.
* \retval -1 Remove the callback hook.
*/
static int basic_hangup_hook(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, void *hook_pvt)
{
/* BUGBUG Race condition. If all parties but one hangup at the same time, the bridge may not be dissolved on the remaining party. */
ast_bridge_channel_lock_bridge(bridge_channel);
if (2 < bridge_channel->bridge->num_channels) {
/* Just allow this channel to leave the multi-party bridge. */
ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_HANGUP);
}
ast_bridge_unlock(bridge_channel->bridge);
return 0;
}
/*!
* \internal
* \brief ast_bridge basic push method.
* \since 12.0.0
*
* \param self Bridge to operate upon.
* \param bridge_channel Bridge channel to push.
* \param swap Bridge channel to swap places with if not NULL.
*
* \note On entry, self is already locked.
*
* \retval 0 on success
* \retval -1 on failure
*/
static int bridge_basic_push(struct ast_bridge *self, struct ast_bridge_channel *bridge_channel, struct ast_bridge_channel *swap)
{
if (ast_bridge_hangup_hook(bridge_channel->features, basic_hangup_hook, NULL, NULL, AST_BRIDGE_HOOK_REMOVE_ON_PULL)
|| ast_bridge_channel_setup_features(bridge_channel)) {
return -1;
}
ast_bridge_update_accountcodes(self, bridge_channel, swap);
ast_bridge_update_linkedids(self, bridge_channel, swap);
return ast_bridge_base_v_table.push(self, bridge_channel, swap);
}
struct ast_bridge_methods ast_bridge_basic_v_table;
struct ast_bridge *ast_bridge_basic_new(void)
{
void *bridge;
bridge = ast_bridge_alloc(sizeof(struct ast_bridge), &ast_bridge_basic_v_table);
bridge = ast_bridge_base_init(bridge,
AST_BRIDGE_CAPABILITY_NATIVE | AST_BRIDGE_CAPABILITY_1TO1MIX
| AST_BRIDGE_CAPABILITY_MULTIMIX,
AST_BRIDGE_FLAG_DISSOLVE_HANGUP | AST_BRIDGE_FLAG_DISSOLVE_EMPTY
| AST_BRIDGE_FLAG_SMART);
bridge = ast_bridge_register(bridge);
return bridge;
}
void ast_bridging_init_basic(void)
{
/* Setup bridge basic subclass v_table. */
ast_bridge_basic_v_table = ast_bridge_base_v_table;
ast_bridge_basic_v_table.name = "basic";
ast_bridge_basic_v_table.push = bridge_basic_push;
}
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