mirror of https://github.com/asterisk/asterisk
This patch does the following: * It moves the pickup code out of features.c and into pickup.c * It removes the vast majority of dead code out of features.c. In particular, this includes the parking code. (issue ASTERISK-22134) git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@396060 65c4cc65-6c06-0410-ace0-fbb531ad65f3changes/78/78/1
Matthew Jordan
12 years ago
parent
63a229e369
commit
38236e54a8
@ -0,0 +1,91 @@
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/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2013, Digium, Inc.
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*
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* Matt Jordan <mjordan@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 Call Pickup API
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*
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* Includes code and algorithms from the Zapata library.
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*
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*/
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#ifndef _AST_FEATURES_H
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#define _AST_FEATURES_H
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/*!
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* \brief Test if a channel can be picked up.
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*
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* \param chan Channel to test if can be picked up.
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*
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* \note This function assumes that chan is locked.
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*
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* \return TRUE if channel can be picked up.
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*/
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int ast_can_pickup(struct ast_channel *chan);
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/*!
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* \brief Find a pickup channel target by group.
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*
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* \param chan channel that initiated pickup.
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*
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* \retval target on success. The returned channel is locked and reffed.
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* \retval NULL on error.
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*/
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struct ast_channel *ast_pickup_find_by_group(struct ast_channel *chan);
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/*!
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* \brief Pickup a call
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*
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* \param chan The channel that initiated the pickup
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*
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* \retval 0 on success
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* \retval -1 on failure
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*/
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int ast_pickup_call(struct ast_channel *chan);
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/*!
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* \brief Pickup a call target.
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*
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* \param chan channel that initiated pickup.
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* \param target channel to be picked up.
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*
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* \note This function assumes that target is locked.
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*
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* \retval 0 on success.
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* \retval -1 on failure.
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*/
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int ast_do_pickup(struct ast_channel *chan, struct ast_channel *target);
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/*!
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* \brief accessor for call pickup message type
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* \since 12.0.0
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*
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* \retval pointer to the stasis message type
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* \retval NULL if not initialized
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*/
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struct stasis_message_type *ast_call_pickup_type(void);
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/*!
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* \brief Initialize pickup
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*
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* \retval 0 on success
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* \retval non-zero on failure
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*/
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int ast_pickup_init(void);
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#endif /* _AST_FEATURES_H */
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File diff suppressed because it is too large
Load Diff
@ -0,0 +1,423 @@
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/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2013, Digium, Inc.
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* Copyright (C) 2012, Russell Bryant
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*
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* Matt Jordan <mjordan@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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/*! \file
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*
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* \brief Routines implementing call pickup
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*
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* \author Matt Jordan <mjordan@digium.com>
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*/
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/*!
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* \li Call pickup uses the configuration file \ref features.conf
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* \addtogroup configuration_file Configuration Files
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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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/*** DOCUMENTATION
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<managerEvent language="en_US" name="Pickup">
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<managerEventInstance class="EVENT_FLAG_CALL">
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<synopsis>Raised when a call pickup occurs.</synopsis>
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<syntax>
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<xi:include xpointer="xpointer(/docs/managerEvent[@name='Newchannel']/managerEventInstance/syntax/parameter)" />
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<parameter name="TargetChannel"/>
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<parameter name="TargetChannelState"><para>A numeric code for the channel's current state, related to TargetChannelStateDesc</para></parameter>
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<parameter name="TargetChannelStateDesc">
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<enumlist>
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<enum name="Down"/>
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<enum name="Rsrvd"/>
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<enum name="OffHook"/>
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<enum name="Dialing"/>
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<enum name="Ring"/>
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<enum name="Ringing"/>
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<enum name="Up"/>
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<enum name="Busy"/>
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<enum name="Dialing Offhook"/>
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<enum name="Pre-ring"/>
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<enum name="Unknown"/>
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</enumlist>
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</parameter>
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<parameter name="TargetCallerIDNum"/>
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<parameter name="TargetCallerIDName"/>
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<parameter name="TargetConnectedLineNum"/>
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<parameter name="TargetConnectedLineName"/>
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<parameter name="TargetAccountCode"/>
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<parameter name="TargetContext"/>
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<parameter name="TargetExten"/>
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<parameter name="TargetPriority"/>
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<parameter name="TargetUniqueid"/>
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</syntax>
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</managerEventInstance>
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</managerEvent>
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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/pickup.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/app.h"
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#include "asterisk/callerid.h"
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#include "asterisk/causes.h"
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#include "asterisk/stasis.h"
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#include "asterisk/stasis_channels.h"
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#include "asterisk/features_config.h"
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static struct ast_manager_event_blob *call_pickup_to_ami(struct stasis_message *message);
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STASIS_MESSAGE_TYPE_DEFN(
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ast_call_pickup_type,
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.to_ami = call_pickup_to_ami);
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/*!
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* The presence of this datastore on the channel indicates that
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* someone is attemting to pickup or has picked up the channel.
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* The purpose is to prevent a race between two channels
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* attempting to pickup the same channel.
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*/
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static const struct ast_datastore_info pickup_active = {
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.type = "pickup-active",
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};
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int ast_can_pickup(struct ast_channel *chan)
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{
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if (!ast_channel_pbx(chan) && !ast_channel_masq(chan) && !ast_test_flag(ast_channel_flags(chan), AST_FLAG_ZOMBIE)
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&& (ast_channel_state(chan) == AST_STATE_RINGING
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|| ast_channel_state(chan) == AST_STATE_RING
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/*
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* Check the down state as well because some SIP devices do not
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* give 180 ringing when they can just give 183 session progress
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* instead. Issue 14005. (Some ISDN switches as well for that
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* matter.)
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*/
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|| ast_channel_state(chan) == AST_STATE_DOWN)
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&& !ast_channel_datastore_find(chan, &pickup_active, NULL)) {
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return 1;
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}
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return 0;
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}
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static int find_channel_by_group(void *obj, void *arg, void *data, int flags)
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{
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struct ast_channel *target = obj; /*!< Potential pickup target */
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struct ast_channel *chan = arg; /*!< Channel wanting to pickup call */
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if (chan == target) {
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return 0;
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}
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ast_channel_lock(target);
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if (ast_can_pickup(target)) {
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/* Lock both channels. */
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while (ast_channel_trylock(chan)) {
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ast_channel_unlock(target);
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sched_yield();
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ast_channel_lock(target);
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}
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/*
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* Both callgroup and namedcallgroup pickup variants are
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* matched independently. Checking for named group match is
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* done last since it's a more expensive operation.
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*/
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if ((ast_channel_pickupgroup(chan) & ast_channel_callgroup(target))
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|| (ast_namedgroups_intersect(ast_channel_named_pickupgroups(chan),
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ast_channel_named_callgroups(target)))) {
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struct ao2_container *candidates = data;/*!< Candidate channels found. */
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/* This is a candidate to pickup */
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ao2_link(candidates, target);
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}
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ast_channel_unlock(chan);
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}
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ast_channel_unlock(target);
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return 0;
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}
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struct ast_channel *ast_pickup_find_by_group(struct ast_channel *chan)
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{
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struct ao2_container *candidates;/*!< Candidate channels found to pickup. */
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struct ast_channel *target;/*!< Potential pickup target */
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candidates = ao2_container_alloc_options(AO2_ALLOC_OPT_LOCK_NOLOCK, 1, NULL, NULL);
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if (!candidates) {
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return NULL;
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}
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/* Find all candidate targets by group. */
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ast_channel_callback(find_channel_by_group, chan, candidates, 0);
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/* Find the oldest pickup target candidate */
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target = NULL;
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for (;;) {
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struct ast_channel *candidate;/*!< Potential new older target */
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struct ao2_iterator iter;
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iter = ao2_iterator_init(candidates, 0);
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while ((candidate = ao2_iterator_next(&iter))) {
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if (!target) {
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/* First target. */
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target = candidate;
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continue;
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}
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if (ast_tvcmp(ast_channel_creationtime(candidate), ast_channel_creationtime(target)) < 0) {
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/* We have a new target. */
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ast_channel_unref(target);
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target = candidate;
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continue;
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}
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ast_channel_unref(candidate);
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}
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ao2_iterator_destroy(&iter);
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if (!target) {
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/* No candidates found. */
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break;
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}
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/* The found channel must be locked and ref'd. */
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ast_channel_lock(target);
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/* Recheck pickup ability */
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if (ast_can_pickup(target)) {
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/* This is the channel to pickup. */
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break;
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}
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/* Someone else picked it up or the call went away. */
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ast_channel_unlock(target);
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ao2_unlink(candidates, target);
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target = ast_channel_unref(target);
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}
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ao2_ref(candidates, -1);
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return target;
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}
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/*!
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* \brief Pickup a call
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* \param chan channel that initiated pickup.
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*
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* Walk list of channels, checking it is not itself, channel is pbx one,
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* check that the callgroup for both channels are the same and the channel is ringing.
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* Answer calling channel, flag channel as answered on queue, masq channels together.
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*/
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int ast_pickup_call(struct ast_channel *chan)
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{
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struct ast_channel *target;/*!< Potential pickup target */
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int res = -1;
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RAII_VAR(struct ast_features_pickup_config *, pickup_cfg, NULL, ao2_cleanup);
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const char *pickup_sound;
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const char *fail_sound;
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ast_debug(1, "Pickup attempt by %s\n", ast_channel_name(chan));
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ast_channel_lock(chan);
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pickup_cfg = ast_get_chan_features_pickup_config(chan);
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if (!pickup_cfg) {
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ast_log(LOG_ERROR, "Unable to retrieve pickup configuration. Unable to play pickup sounds\n");
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}
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pickup_sound = ast_strdupa(pickup_cfg ? pickup_cfg->pickupsound : "");
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fail_sound = ast_strdupa(pickup_cfg ? pickup_cfg->pickupfailsound : "");
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ast_channel_unlock(chan);
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/* The found channel is already locked. */
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target = ast_pickup_find_by_group(chan);
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if (target) {
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ast_log(LOG_NOTICE, "Pickup %s attempt by %s\n", ast_channel_name(target), ast_channel_name(chan));
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res = ast_do_pickup(chan, target);
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ast_channel_unlock(target);
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if (!res) {
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if (!ast_strlen_zero(pickup_sound)) {
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pbx_builtin_setvar_helper(target, "BRIDGE_PLAY_SOUND", pickup_sound);
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}
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} else {
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ast_log(LOG_WARNING, "Pickup %s failed by %s\n", ast_channel_name(target), ast_channel_name(chan));
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}
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target = ast_channel_unref(target);
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}
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if (res < 0) {
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ast_debug(1, "No call pickup possible... for %s\n", ast_channel_name(chan));
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if (!ast_strlen_zero(fail_sound)) {
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ast_answer(chan);
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ast_stream_and_wait(chan, fail_sound, "");
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}
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}
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return res;
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}
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static struct ast_manager_event_blob *call_pickup_to_ami(struct stasis_message *message)
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{
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struct ast_multi_channel_blob *contents = stasis_message_data(message);
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struct ast_channel_snapshot *chan;
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struct ast_channel_snapshot *target;
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struct ast_manager_event_blob *res;
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RAII_VAR(struct ast_str *, channel_str, NULL, ast_free);
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RAII_VAR(struct ast_str *, target_str, NULL, ast_free);
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chan = ast_multi_channel_blob_get_channel(contents, "channel");
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target = ast_multi_channel_blob_get_channel(contents, "target");
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ast_assert(chan != NULL && target != NULL);
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if (!(channel_str = ast_manager_build_channel_state_string(chan))) {
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|
return NULL;
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}
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|
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if (!(target_str = ast_manager_build_channel_state_string_prefix(target, "Target"))) {
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|
return NULL;
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}
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res = ast_manager_event_blob_create(EVENT_FLAG_CALL, "Pickup",
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|
"%s"
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||||||
|
"%s",
|
||||||
|
ast_str_buffer(channel_str),
|
||||||
|
ast_str_buffer(target_str));
|
||||||
|
|
||||||
|
return res;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int send_call_pickup_stasis_message(struct ast_channel *picking_up, struct ast_channel_snapshot *chan, struct ast_channel_snapshot *target)
|
||||||
|
{
|
||||||
|
RAII_VAR(struct ast_multi_channel_blob *, pickup_payload, NULL, ao2_cleanup);
|
||||||
|
RAII_VAR(struct stasis_message *, msg, NULL, ao2_cleanup);
|
||||||
|
|
||||||
|
if (!(pickup_payload = ast_multi_channel_blob_create(ast_json_null()))) {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
ast_multi_channel_blob_add_channel(pickup_payload, "channel", chan);
|
||||||
|
ast_multi_channel_blob_add_channel(pickup_payload, "target", target);
|
||||||
|
|
||||||
|
if (!(msg = stasis_message_create(ast_call_pickup_type(), pickup_payload))) {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
stasis_publish(ast_channel_topic(picking_up), msg);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int ast_do_pickup(struct ast_channel *chan, struct ast_channel *target)
|
||||||
|
{
|
||||||
|
struct ast_party_connected_line connected_caller;
|
||||||
|
struct ast_datastore *ds_pickup;
|
||||||
|
const char *chan_name;/*!< A masquerade changes channel names. */
|
||||||
|
const char *target_name;/*!< A masquerade changes channel names. */
|
||||||
|
int res = -1;
|
||||||
|
|
||||||
|
RAII_VAR(struct ast_channel_snapshot *, chan_snapshot, NULL, ao2_cleanup);
|
||||||
|
RAII_VAR(struct ast_channel_snapshot *, target_snapshot, NULL, ao2_cleanup);
|
||||||
|
|
||||||
|
target_name = ast_strdupa(ast_channel_name(target));
|
||||||
|
ast_debug(1, "Call pickup on '%s' by '%s'\n", target_name, ast_channel_name(chan));
|
||||||
|
|
||||||
|
/* Mark the target to block any call pickup race. */
|
||||||
|
ds_pickup = ast_datastore_alloc(&pickup_active, NULL);
|
||||||
|
if (!ds_pickup) {
|
||||||
|
ast_log(LOG_WARNING,
|
||||||
|
"Unable to create channel datastore on '%s' for call pickup\n", target_name);
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
ast_channel_datastore_add(target, ds_pickup);
|
||||||
|
|
||||||
|
ast_party_connected_line_init(&connected_caller);
|
||||||
|
ast_party_connected_line_copy(&connected_caller, ast_channel_connected(target));
|
||||||
|
ast_channel_unlock(target);/* The pickup race is avoided so we do not need the lock anymore. */
|
||||||
|
/* Reset any earlier private connected id representation */
|
||||||
|
ast_party_id_reset(&connected_caller.priv);
|
||||||
|
|
||||||
|
connected_caller.source = AST_CONNECTED_LINE_UPDATE_SOURCE_ANSWER;
|
||||||
|
if (ast_channel_connected_line_sub(NULL, chan, &connected_caller, 0) &&
|
||||||
|
ast_channel_connected_line_macro(NULL, chan, &connected_caller, 0, 0)) {
|
||||||
|
ast_channel_update_connected_line(chan, &connected_caller, NULL);
|
||||||
|
}
|
||||||
|
ast_party_connected_line_free(&connected_caller);
|
||||||
|
|
||||||
|
ast_channel_lock(chan);
|
||||||
|
chan_name = ast_strdupa(ast_channel_name(chan));
|
||||||
|
ast_connected_line_copy_from_caller(&connected_caller, ast_channel_caller(chan));
|
||||||
|
ast_channel_unlock(chan);
|
||||||
|
connected_caller.source = AST_CONNECTED_LINE_UPDATE_SOURCE_ANSWER;
|
||||||
|
|
||||||
|
if (ast_answer(chan)) {
|
||||||
|
ast_log(LOG_WARNING, "Unable to answer '%s'\n", chan_name);
|
||||||
|
goto pickup_failed;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ast_queue_control(chan, AST_CONTROL_ANSWER)) {
|
||||||
|
ast_log(LOG_WARNING, "Unable to queue answer on '%s'\n", chan_name);
|
||||||
|
goto pickup_failed;
|
||||||
|
}
|
||||||
|
|
||||||
|
ast_channel_queue_connected_line_update(chan, &connected_caller, NULL);
|
||||||
|
|
||||||
|
/* setting the HANGUPCAUSE so the ringing channel knows this call was not a missed call */
|
||||||
|
ast_channel_hangupcause_set(chan, AST_CAUSE_ANSWERED_ELSEWHERE);
|
||||||
|
|
||||||
|
if (!(chan_snapshot = ast_channel_snapshot_create(chan))) {
|
||||||
|
goto pickup_failed;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!(target_snapshot = ast_channel_snapshot_create(target))) {
|
||||||
|
goto pickup_failed;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ast_channel_move(target, chan)) {
|
||||||
|
ast_log(LOG_WARNING, "Unable to complete call pickup of '%s' with '%s'\n",
|
||||||
|
chan_name, target_name);
|
||||||
|
goto pickup_failed;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* target points to the channel that did the pickup at this point, so use that channel's topic instead of chan */
|
||||||
|
send_call_pickup_stasis_message(target, chan_snapshot, target_snapshot);
|
||||||
|
|
||||||
|
res = 0;
|
||||||
|
|
||||||
|
pickup_failed:
|
||||||
|
ast_channel_lock(target);
|
||||||
|
if (!ast_channel_datastore_remove(target, ds_pickup)) {
|
||||||
|
ast_datastore_free(ds_pickup);
|
||||||
|
}
|
||||||
|
ast_party_connected_line_free(&connected_caller);
|
||||||
|
|
||||||
|
return res;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*! \internal \brief Clean up resources on Asterisk shutdown */
|
||||||
|
static void pickup_shutdown(void)
|
||||||
|
{
|
||||||
|
STASIS_MESSAGE_TYPE_CLEANUP(ast_call_pickup_type);
|
||||||
|
}
|
||||||
|
|
||||||
|
int ast_pickup_init(void)
|
||||||
|
{
|
||||||
|
STASIS_MESSAGE_TYPE_INIT(ast_call_pickup_type);
|
||||||
|
ast_register_atexit(pickup_shutdown);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
Loading…
Reference in new issue