2013-07-25 02:20:23 +00:00
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/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2007 - 2009, Digium, Inc.
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*
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* Richard Mudgett <rmudgett@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*!
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* \file
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* \brief After Bridge Execution API
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*
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* \author Richard Mudgett <rmudgett@digium.com>
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*
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* See Also:
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* \arg \ref AstCREDITS
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/logger.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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2013-07-25 04:06:32 +00:00
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#include "asterisk/bridge_after.h"
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2013-07-25 02:20:23 +00:00
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struct after_bridge_cb_node {
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/*! Next list node. */
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AST_LIST_ENTRY(after_bridge_cb_node) list;
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/*! Desired callback function. */
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ast_bridge_after_cb callback;
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/*! After bridge callback will not be called and destroy any resources data may contain. */
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ast_bridge_after_cb_failed failed;
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/*! Extra data to pass to the callback. */
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void *data;
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/*! Reason the after bridge callback failed. */
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enum ast_bridge_after_cb_reason reason;
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};
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struct after_bridge_cb_ds {
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/*! After bridge callbacks container. */
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AST_LIST_HEAD(, after_bridge_cb_node) callbacks;
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};
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/*!
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* \internal
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* \brief Indicate after bridge callback failed.
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* \since 12.0.0
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*
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* \param node After bridge callback node.
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*
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* \return Nothing
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*/
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static void after_bridge_cb_failed(struct after_bridge_cb_node *node)
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{
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if (node->failed) {
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node->failed(node->reason, node->data);
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node->failed = NULL;
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}
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}
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/*!
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* \internal
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* \brief Run discarding any after bridge callbacks.
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* \since 12.0.0
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*
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* \param after_bridge After bridge callback container process.
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* \param reason Why are we doing this.
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*
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* \return Nothing
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*/
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static void after_bridge_cb_run_discard(struct after_bridge_cb_ds *after_bridge, enum ast_bridge_after_cb_reason reason)
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{
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struct after_bridge_cb_node *node;
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for (;;) {
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AST_LIST_LOCK(&after_bridge->callbacks);
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node = AST_LIST_REMOVE_HEAD(&after_bridge->callbacks, list);
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AST_LIST_UNLOCK(&after_bridge->callbacks);
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if (!node) {
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break;
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}
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if (!node->reason) {
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node->reason = reason;
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}
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after_bridge_cb_failed(node);
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ast_free(node);
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}
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}
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/*!
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* \internal
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* \brief Destroy the after bridge callback datastore.
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* \since 12.0.0
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*
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* \param data After bridge callback data to destroy.
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*
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* \return Nothing
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*/
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static void after_bridge_cb_destroy(void *data)
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{
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struct after_bridge_cb_ds *after_bridge = data;
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after_bridge_cb_run_discard(after_bridge, AST_BRIDGE_AFTER_CB_REASON_DESTROY);
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AST_LIST_HEAD_DESTROY(&after_bridge->callbacks);
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ast_free(after_bridge);
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}
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static struct after_bridge_cb_ds *after_bridge_cb_find(struct ast_channel *chan);
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/*!
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* \internal
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* \brief Fixup the after bridge callback datastore.
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* \since 12.0.0
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*
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* \param data After bridge callback data to fixup.
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* \param old_chan The datastore is moving from this channel.
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* \param new_chan The datastore is moving to this channel.
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*
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* \return Nothing
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*/
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static void after_bridge_cb_fixup(void *data, struct ast_channel *old_chan, struct ast_channel *new_chan)
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{
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struct after_bridge_cb_ds *after_bridge;
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struct after_bridge_cb_node *node;
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after_bridge = after_bridge_cb_find(new_chan);
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if (!after_bridge) {
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return;
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}
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AST_LIST_LOCK(&after_bridge->callbacks);
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node = AST_LIST_LAST(&after_bridge->callbacks);
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if (node && !node->reason) {
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node->reason = AST_BRIDGE_AFTER_CB_REASON_MASQUERADE;
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}
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AST_LIST_UNLOCK(&after_bridge->callbacks);
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}
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static const struct ast_datastore_info after_bridge_cb_info = {
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.type = "after-bridge-cb",
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.destroy = after_bridge_cb_destroy,
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.chan_fixup = after_bridge_cb_fixup,
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};
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/*!
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* \internal
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* \brief Find an after bridge callback datastore container.
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* \since 12.0.0
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*
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* \param chan Channel to find the after bridge callback container on.
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*
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* \retval after_bridge datastore container on success.
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* \retval NULL on error.
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*/
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static struct after_bridge_cb_ds *after_bridge_cb_find(struct ast_channel *chan)
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{
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struct ast_datastore *datastore;
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SCOPED_CHANNELLOCK(lock, chan);
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datastore = ast_channel_datastore_find(chan, &after_bridge_cb_info, NULL);
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if (!datastore) {
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return NULL;
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}
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return datastore->data;
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}
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/*!
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* \internal
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* \brief Setup/create an after bridge callback datastore container.
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* \since 12.0.0
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*
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* \param chan Channel to setup/create the after bridge callback container on.
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*
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* \retval after_bridge datastore container on success.
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* \retval NULL on error.
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*/
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static struct after_bridge_cb_ds *after_bridge_cb_setup(struct ast_channel *chan)
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{
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struct ast_datastore *datastore;
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struct after_bridge_cb_ds *after_bridge;
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SCOPED_CHANNELLOCK(lock, chan);
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datastore = ast_channel_datastore_find(chan, &after_bridge_cb_info, NULL);
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if (datastore) {
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return datastore->data;
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}
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/* Create a new datastore. */
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datastore = ast_datastore_alloc(&after_bridge_cb_info, NULL);
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if (!datastore) {
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return NULL;
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}
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after_bridge = ast_calloc(1, sizeof(*after_bridge));
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if (!after_bridge) {
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ast_datastore_free(datastore);
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return NULL;
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}
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AST_LIST_HEAD_INIT(&after_bridge->callbacks);
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datastore->data = after_bridge;
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ast_channel_datastore_add(chan, datastore);
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return datastore->data;
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}
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void ast_bridge_run_after_callback(struct ast_channel *chan)
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{
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struct after_bridge_cb_ds *after_bridge;
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struct after_bridge_cb_node *node;
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after_bridge = after_bridge_cb_find(chan);
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if (!after_bridge) {
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return;
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}
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for (;;) {
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AST_LIST_LOCK(&after_bridge->callbacks);
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node = AST_LIST_REMOVE_HEAD(&after_bridge->callbacks, list);
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AST_LIST_UNLOCK(&after_bridge->callbacks);
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if (!node) {
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break;
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}
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if (node->reason) {
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after_bridge_cb_failed(node);
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} else {
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node->failed = NULL;
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node->callback(chan, node->data);
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}
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ast_free(node);
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}
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}
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void ast_bridge_discard_after_callback(struct ast_channel *chan, enum ast_bridge_after_cb_reason reason)
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{
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struct after_bridge_cb_ds *after_bridge;
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after_bridge = after_bridge_cb_find(chan);
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if (!after_bridge) {
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return;
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}
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after_bridge_cb_run_discard(after_bridge, reason);
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}
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int ast_bridge_set_after_callback(struct ast_channel *chan, ast_bridge_after_cb callback, ast_bridge_after_cb_failed failed, void *data)
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{
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struct after_bridge_cb_ds *after_bridge;
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struct after_bridge_cb_node *new_node;
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struct after_bridge_cb_node *last_node;
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/* Sanity checks. */
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ast_assert(chan != NULL);
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if (!chan || !callback) {
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return -1;
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}
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after_bridge = after_bridge_cb_setup(chan);
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if (!after_bridge) {
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return -1;
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}
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/* Create a new callback node. */
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new_node = ast_calloc(1, sizeof(*new_node));
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if (!new_node) {
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return -1;
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}
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new_node->callback = callback;
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new_node->failed = failed;
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new_node->data = data;
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/* Put it in the container disabling any previously active one. */
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AST_LIST_LOCK(&after_bridge->callbacks);
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last_node = AST_LIST_LAST(&after_bridge->callbacks);
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if (last_node && !last_node->reason) {
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last_node->reason = AST_BRIDGE_AFTER_CB_REASON_REPLACED;
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}
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AST_LIST_INSERT_TAIL(&after_bridge->callbacks, new_node, list);
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AST_LIST_UNLOCK(&after_bridge->callbacks);
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return 0;
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}
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const char *reason_strings[] = {
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[AST_BRIDGE_AFTER_CB_REASON_DESTROY] = "Channel destroyed (hungup)",
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[AST_BRIDGE_AFTER_CB_REASON_REPLACED] = "Callback was replaced",
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[AST_BRIDGE_AFTER_CB_REASON_MASQUERADE] = "Channel masqueraded",
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[AST_BRIDGE_AFTER_CB_REASON_DEPART] = "Channel was departed from bridge",
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[AST_BRIDGE_AFTER_CB_REASON_REMOVED] = "Callback was removed",
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};
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const char *ast_bridge_after_cb_reason_string(enum ast_bridge_after_cb_reason reason)
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{
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if (reason < AST_BRIDGE_AFTER_CB_REASON_DESTROY
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|| AST_BRIDGE_AFTER_CB_REASON_REMOVED < reason
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|| !reason_strings[reason]) {
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return "Unknown";
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}
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return reason_strings[reason];
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}
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struct after_bridge_goto_ds {
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/*! Goto string that can be parsed by ast_parseable_goto(). */
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const char *parseable_goto;
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/*! Specific goto context or default context for parseable_goto. */
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const char *context;
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/*! Specific goto exten or default exten for parseable_goto. */
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const char *exten;
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/*! Specific goto priority or default priority for parseable_goto. */
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int priority;
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/*! TRUE if the peer should run the h exten. */
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unsigned int run_h_exten:1;
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/*! Specific goto location */
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unsigned int specific:1;
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};
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/*!
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* \internal
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* \brief Destroy the after bridge goto datastore.
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* \since 12.0.0
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*
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* \param data After bridge goto data to destroy.
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*
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* \return Nothing
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*/
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static void after_bridge_goto_destroy(void *data)
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{
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struct after_bridge_goto_ds *after_bridge = data;
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ast_free((char *) after_bridge->parseable_goto);
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ast_free((char *) after_bridge->context);
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ast_free((char *) after_bridge->exten);
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}
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/*!
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* \internal
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* \brief Fixup the after bridge goto datastore.
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* \since 12.0.0
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*
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* \param data After bridge goto data to fixup.
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* \param old_chan The datastore is moving from this channel.
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* \param new_chan The datastore is moving to this channel.
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*
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* \return Nothing
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*/
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static void after_bridge_goto_fixup(void *data, struct ast_channel *old_chan, struct ast_channel *new_chan)
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{
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/* There can be only one. Discard any already on the new channel. */
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ast_bridge_discard_after_goto(new_chan);
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}
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static const struct ast_datastore_info after_bridge_goto_info = {
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.type = "after-bridge-goto",
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.destroy = after_bridge_goto_destroy,
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.chan_fixup = after_bridge_goto_fixup,
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};
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/*!
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* \internal
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* \brief Remove channel goto location after the bridge and return it.
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* \since 12.0.0
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*
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* \param chan Channel to remove after bridge goto location.
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*
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|
* \retval datastore on success.
|
|
|
|
* \retval NULL on error or not found.
|
|
|
|
*/
|
|
|
|
static struct ast_datastore *after_bridge_goto_remove(struct ast_channel *chan)
|
|
|
|
{
|
|
|
|
struct ast_datastore *datastore;
|
|
|
|
|
|
|
|
ast_channel_lock(chan);
|
|
|
|
datastore = ast_channel_datastore_find(chan, &after_bridge_goto_info, NULL);
|
|
|
|
if (datastore && ast_channel_datastore_remove(chan, datastore)) {
|
|
|
|
datastore = NULL;
|
|
|
|
}
|
|
|
|
ast_channel_unlock(chan);
|
|
|
|
|
|
|
|
return datastore;
|
|
|
|
}
|
|
|
|
|
|
|
|
void ast_bridge_discard_after_goto(struct ast_channel *chan)
|
|
|
|
{
|
|
|
|
struct ast_datastore *datastore;
|
|
|
|
|
|
|
|
datastore = after_bridge_goto_remove(chan);
|
|
|
|
if (datastore) {
|
|
|
|
ast_datastore_free(datastore);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void ast_bridge_read_after_goto(struct ast_channel *chan, char *buffer, size_t buf_size)
|
|
|
|
{
|
|
|
|
struct ast_datastore *datastore;
|
|
|
|
struct after_bridge_goto_ds *after_bridge;
|
|
|
|
char *current_pos = buffer;
|
|
|
|
size_t remaining_size = buf_size;
|
|
|
|
|
|
|
|
SCOPED_CHANNELLOCK(lock, chan);
|
|
|
|
|
|
|
|
datastore = ast_channel_datastore_find(chan, &after_bridge_goto_info, NULL);
|
|
|
|
if (!datastore) {
|
|
|
|
buffer[0] = '\0';
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
after_bridge = datastore->data;
|
|
|
|
|
|
|
|
if (after_bridge->parseable_goto) {
|
|
|
|
snprintf(buffer, buf_size, "%s", after_bridge->parseable_goto);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!ast_strlen_zero(after_bridge->context)) {
|
|
|
|
snprintf(current_pos, remaining_size, "%s,", after_bridge->context);
|
|
|
|
remaining_size = remaining_size - strlen(current_pos);
|
|
|
|
current_pos += strlen(current_pos);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (after_bridge->run_h_exten) {
|
|
|
|
snprintf(current_pos, remaining_size, "h,");
|
|
|
|
remaining_size = remaining_size - strlen(current_pos);
|
|
|
|
current_pos += strlen(current_pos);
|
|
|
|
} else if (!ast_strlen_zero(after_bridge->exten)) {
|
|
|
|
snprintf(current_pos, remaining_size, "%s,", after_bridge->exten);
|
|
|
|
remaining_size = remaining_size - strlen(current_pos);
|
|
|
|
current_pos += strlen(current_pos);
|
|
|
|
}
|
|
|
|
|
|
|
|
snprintf(current_pos, remaining_size, "%d", after_bridge->priority);
|
|
|
|
}
|
|
|
|
|
|
|
|
int ast_bridge_setup_after_goto(struct ast_channel *chan)
|
|
|
|
{
|
|
|
|
struct ast_datastore *datastore;
|
|
|
|
struct after_bridge_goto_ds *after_bridge;
|
|
|
|
int goto_failed = -1;
|
|
|
|
|
|
|
|
/* Determine if we are going to setup a dialplan location and where. */
|
|
|
|
if (ast_channel_softhangup_internal_flag(chan) & AST_SOFTHANGUP_ASYNCGOTO) {
|
|
|
|
/* An async goto has already setup a location. */
|
|
|
|
ast_channel_clear_softhangup(chan, AST_SOFTHANGUP_ASYNCGOTO);
|
|
|
|
if (!ast_check_hangup(chan)) {
|
|
|
|
goto_failed = 0;
|
|
|
|
}
|
|
|
|
return goto_failed;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Get after bridge goto datastore. */
|
|
|
|
datastore = after_bridge_goto_remove(chan);
|
|
|
|
if (!datastore) {
|
|
|
|
return goto_failed;
|
|
|
|
}
|
|
|
|
|
|
|
|
after_bridge = datastore->data;
|
|
|
|
if (after_bridge->run_h_exten) {
|
|
|
|
if (ast_exists_extension(chan, after_bridge->context, "h", 1,
|
|
|
|
S_COR(ast_channel_caller(chan)->id.number.valid,
|
|
|
|
ast_channel_caller(chan)->id.number.str, NULL))) {
|
|
|
|
ast_debug(1, "Running after bridge goto h exten %s,h,1\n",
|
|
|
|
ast_channel_context(chan));
|
|
|
|
ast_pbx_h_exten_run(chan, after_bridge->context);
|
|
|
|
}
|
|
|
|
} else if (!ast_check_hangup(chan)) {
|
|
|
|
if (after_bridge->specific) {
|
|
|
|
goto_failed = ast_explicit_goto(chan, after_bridge->context,
|
|
|
|
after_bridge->exten, after_bridge->priority);
|
|
|
|
} else if (!ast_strlen_zero(after_bridge->parseable_goto)) {
|
|
|
|
char *context;
|
|
|
|
char *exten;
|
|
|
|
int priority;
|
|
|
|
|
|
|
|
/* Option F(x) for Bridge(), Dial(), and Queue() */
|
|
|
|
|
|
|
|
/* Save current dialplan location in case of failure. */
|
|
|
|
context = ast_strdupa(ast_channel_context(chan));
|
|
|
|
exten = ast_strdupa(ast_channel_exten(chan));
|
|
|
|
priority = ast_channel_priority(chan);
|
|
|
|
|
|
|
|
/* Set current dialplan position to default dialplan position */
|
|
|
|
ast_explicit_goto(chan, after_bridge->context, after_bridge->exten,
|
|
|
|
after_bridge->priority);
|
|
|
|
|
|
|
|
/* Then perform the goto */
|
|
|
|
goto_failed = ast_parseable_goto(chan, after_bridge->parseable_goto);
|
|
|
|
if (goto_failed) {
|
|
|
|
/* Restore original dialplan location. */
|
|
|
|
ast_channel_context_set(chan, context);
|
|
|
|
ast_channel_exten_set(chan, exten);
|
|
|
|
ast_channel_priority_set(chan, priority);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
/* Option F() for Bridge(), Dial(), and Queue() */
|
|
|
|
goto_failed = ast_goto_if_exists(chan, after_bridge->context,
|
|
|
|
after_bridge->exten, after_bridge->priority + 1);
|
|
|
|
}
|
|
|
|
if (!goto_failed) {
|
|
|
|
if (ast_test_flag(ast_channel_flags(chan), AST_FLAG_IN_AUTOLOOP)) {
|
|
|
|
ast_channel_priority_set(chan, ast_channel_priority(chan) + 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
ast_debug(1, "Setup after bridge goto location to %s,%s,%d.\n",
|
|
|
|
ast_channel_context(chan),
|
|
|
|
ast_channel_exten(chan),
|
|
|
|
ast_channel_priority(chan));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Discard after bridge goto datastore. */
|
|
|
|
ast_datastore_free(datastore);
|
|
|
|
|
|
|
|
return goto_failed;
|
|
|
|
}
|
|
|
|
|
|
|
|
void ast_bridge_run_after_goto(struct ast_channel *chan)
|
|
|
|
{
|
|
|
|
int goto_failed;
|
|
|
|
|
|
|
|
goto_failed = ast_bridge_setup_after_goto(chan);
|
|
|
|
if (goto_failed || ast_pbx_run(chan)) {
|
|
|
|
ast_hangup(chan);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*!
|
|
|
|
* \internal
|
|
|
|
* \brief Set after bridge goto location of channel.
|
|
|
|
* \since 12.0.0
|
|
|
|
*
|
|
|
|
* \param chan Channel to setup after bridge goto location.
|
|
|
|
* \param run_h_exten TRUE if the h exten should be run.
|
|
|
|
* \param specific TRUE if the context/exten/priority is exactly specified.
|
|
|
|
* \param context Context to goto after bridge.
|
|
|
|
* \param exten Exten to goto after bridge. (Could be NULL if run_h_exten)
|
|
|
|
* \param priority Priority to goto after bridge.
|
|
|
|
* \param parseable_goto User specified goto string. (Could be NULL)
|
|
|
|
*
|
|
|
|
* \details Add a channel datastore to setup the goto location
|
|
|
|
* when the channel leaves the bridge and run a PBX from there.
|
|
|
|
*
|
|
|
|
* If run_h_exten then execute the h exten found in the given context.
|
|
|
|
* Else if specific then goto the given context/exten/priority.
|
|
|
|
* Else if parseable_goto then use the given context/exten/priority
|
|
|
|
* as the relative position for the parseable_goto.
|
|
|
|
* Else goto the given context/exten/priority+1.
|
|
|
|
*
|
|
|
|
* \return Nothing
|
|
|
|
*/
|
|
|
|
static void __after_bridge_set_goto(struct ast_channel *chan, int run_h_exten, int specific, const char *context, const char *exten, int priority, const char *parseable_goto)
|
|
|
|
{
|
|
|
|
struct ast_datastore *datastore;
|
|
|
|
struct after_bridge_goto_ds *after_bridge;
|
|
|
|
|
|
|
|
/* Sanity checks. */
|
|
|
|
ast_assert(chan != NULL);
|
|
|
|
if (!chan) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (run_h_exten) {
|
|
|
|
ast_assert(run_h_exten && context);
|
|
|
|
if (!context) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
ast_assert(context && exten && 0 < priority);
|
|
|
|
if (!context || !exten || priority < 1) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Create a new datastore. */
|
|
|
|
datastore = ast_datastore_alloc(&after_bridge_goto_info, NULL);
|
|
|
|
if (!datastore) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
after_bridge = ast_calloc(1, sizeof(*after_bridge));
|
|
|
|
if (!after_bridge) {
|
|
|
|
ast_datastore_free(datastore);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Initialize it. */
|
|
|
|
after_bridge->parseable_goto = ast_strdup(parseable_goto);
|
|
|
|
after_bridge->context = ast_strdup(context);
|
|
|
|
after_bridge->exten = ast_strdup(exten);
|
|
|
|
after_bridge->priority = priority;
|
|
|
|
after_bridge->run_h_exten = run_h_exten ? 1 : 0;
|
|
|
|
after_bridge->specific = specific ? 1 : 0;
|
|
|
|
datastore->data = after_bridge;
|
|
|
|
if ((parseable_goto && !after_bridge->parseable_goto)
|
|
|
|
|| (context && !after_bridge->context)
|
|
|
|
|| (exten && !after_bridge->exten)) {
|
|
|
|
ast_datastore_free(datastore);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Put it on the channel replacing any existing one. */
|
|
|
|
ast_channel_lock(chan);
|
|
|
|
ast_bridge_discard_after_goto(chan);
|
|
|
|
ast_channel_datastore_add(chan, datastore);
|
|
|
|
ast_channel_unlock(chan);
|
|
|
|
}
|
|
|
|
|
|
|
|
void ast_bridge_set_after_goto(struct ast_channel *chan, const char *context, const char *exten, int priority)
|
|
|
|
{
|
|
|
|
__after_bridge_set_goto(chan, 0, 1, context, exten, priority, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
void ast_bridge_set_after_h(struct ast_channel *chan, const char *context)
|
|
|
|
{
|
|
|
|
__after_bridge_set_goto(chan, 1, 0, context, NULL, 1, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
void ast_bridge_set_after_go_on(struct ast_channel *chan, const char *context, const char *exten, int priority, const char *parseable_goto)
|
|
|
|
{
|
|
|
|
char *p_goto;
|
|
|
|
|
|
|
|
if (!ast_strlen_zero(parseable_goto)) {
|
|
|
|
p_goto = ast_strdupa(parseable_goto);
|
|
|
|
ast_replace_subargument_delimiter(p_goto);
|
|
|
|
} else {
|
|
|
|
p_goto = NULL;
|
|
|
|
}
|
|
|
|
__after_bridge_set_goto(chan, 0, 0, context, exten, priority, p_goto);
|
|
|
|
}
|