664 lines
24 KiB
C
664 lines
24 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2006, Digium, Inc.
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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 Channel info dialplan functions
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*
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* \author Kevin P. Fleming <kpfleming@digium.com>
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* \author Ben Winslow
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*
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* \ingroup functions
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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 <regex.h>
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#include <ctype.h>
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#include "asterisk/module.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/utils.h"
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#include "asterisk/app.h"
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#include "asterisk/indications.h"
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#include "asterisk/stringfields.h"
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#include "asterisk/global_datastores.h"
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/*** DOCUMENTATION
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<function name="CHANNELS" language="en_US">
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<synopsis>
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Gets the list of channels, optionally filtering by a regular expression.
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</synopsis>
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<syntax>
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<parameter name="regular_expression" />
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</syntax>
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<description>
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<para>Gets the list of channels, optionally filtering by a <replaceable>regular_expression</replaceable>. If
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no argument is provided, all known channels are returned. The
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<replaceable>regular_expression</replaceable> must correspond to
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the POSIX.2 specification, as shown in <emphasis>regex(7)</emphasis>. The list returned
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will be space-delimited.</para>
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</description>
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</function>
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<function name="MASTER_CHANNEL" language="en_US">
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<synopsis>
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Gets or sets variables on the master channel
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</synopsis>
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<description>
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<para>Allows access to the channel which created the current channel, if any. If the channel is already
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a master channel, then accesses local channel variables.</para>
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</description>
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</function>
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<function name="CHANNEL" language="en_US">
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<synopsis>
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Gets/sets various pieces of information about the channel.
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</synopsis>
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<syntax>
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<parameter name="item" required="true">
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<para>Standard items (provided by all channel technologies) are:</para>
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<enumlist>
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<enum name="audioreadformat">
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<para>R/O format currently being read.</para>
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</enum>
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<enum name="audionativeformat">
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<para>R/O format used natively for audio.</para>
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</enum>
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<enum name="audiowriteformat">
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<para>R/O format currently being written.</para>
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</enum>
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<enum name="callgroup">
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<para>R/W call groups for call pickup.</para>
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</enum>
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<enum name="pickupgroup">
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<para>R/W call groups for call pickup.</para>
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</enum>
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<enum name="channeltype">
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<para>R/O technology used for channel.</para>
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</enum>
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<enum name="checkhangup">
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<para>R/O Whether the channel is hanging up (1/0)</para>
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</enum>
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<enum name="language">
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<para>R/W language for sounds played.</para>
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</enum>
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<enum name="musicclass">
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<para>R/W class (from musiconhold.conf) for hold music.</para>
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</enum>
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<enum name="name">
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<para>The name of the channel</para>
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</enum>
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<enum name="parkinglot">
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<para>R/W parkinglot for parking.</para>
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</enum>
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<enum name="rxgain">
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<para>R/W set rxgain level on channel drivers that support it.</para>
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</enum>
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<enum name="secure_bridge_signaling">
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<para>Whether or not channels bridged to this channel require secure signaling</para>
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</enum>
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<enum name="secure_bridge_media">
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<para>Whether or not channels bridged to this channel require secure media</para>
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</enum>
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<enum name="state">
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<para>R/O state for channel</para>
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</enum>
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<enum name="tonezone">
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<para>R/W zone for indications played</para>
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</enum>
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<enum name="transfercapability">
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<para>R/W ISDN Transfer Capability, one of:</para>
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<enumlist>
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<enum name="SPEECH" />
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<enum name="DIGITAL" />
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<enum name="RESTRICTED_DIGITAL" />
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<enum name="3K1AUDIO" />
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<enum name="DIGITAL_W_TONES" />
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<enum name="VIDEO" />
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</enumlist>
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</enum>
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<enum name="txgain">
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<para>R/W set txgain level on channel drivers that support it.</para>
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</enum>
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<enum name="videonativeformat">
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<para>R/O format used natively for video</para>
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</enum>
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<enum name="trace">
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<para>R/W whether or not context tracing is enabled, only available
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<emphasis>if CHANNEL_TRACE is defined</emphasis>.</para>
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</enum>
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</enumlist>
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<para><emphasis>chan_sip</emphasis> provides the following additional options:</para>
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<enumlist>
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<enum name="peerip">
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<para>R/O Get the IP address of the peer.</para>
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</enum>
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<enum name="recvip">
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<para>R/O Get the source IP address of the peer.</para>
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</enum>
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<enum name="from">
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<para>R/O Get the URI from the From: header.</para>
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</enum>
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<enum name="uri">
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<para>R/O Get the URI from the Contact: header.</para>
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</enum>
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<enum name="useragent">
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<para>R/O Get the useragent.</para>
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</enum>
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<enum name="peername">
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<para>R/O Get the name of the peer.</para>
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</enum>
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<enum name="t38passthrough">
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<para>R/O <literal>1</literal> if T38 is offered or enabled in this channel,
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otherwise <literal>0</literal></para>
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</enum>
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<enum name="rtpqos">
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<para>R/O Get QOS information about the RTP stream</para>
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<para> This option takes two additional arguments:</para>
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<para> Argument 1:</para>
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<para> <literal>audio</literal> Get data about the audio stream</para>
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<para> <literal>video</literal> Get data about the video stream</para>
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<para> <literal>text</literal> Get data about the text stream</para>
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<para> Argument 2:</para>
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<para> <literal>local_ssrc</literal> Local SSRC (stream ID)</para>
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<para> <literal>local_lostpackets</literal> Local lost packets</para>
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<para> <literal>local_jitter</literal> Local calculated jitter</para>
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<para> <literal>local_maxjitter</literal> Local calculated jitter (maximum)</para>
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<para> <literal>local_minjitter</literal> Local calculated jitter (minimum)</para>
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<para> <literal>local_normdevjitter</literal>Local calculated jitter (normal deviation)</para>
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<para> <literal>local_stdevjitter</literal> Local calculated jitter (standard deviation)</para>
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<para> <literal>local_count</literal> Number of received packets</para>
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<para> <literal>remote_ssrc</literal> Remote SSRC (stream ID)</para>
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<para> <literal>remote_lostpackets</literal>Remote lost packets</para>
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<para> <literal>remote_jitter</literal> Remote reported jitter</para>
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<para> <literal>remote_maxjitter</literal> Remote calculated jitter (maximum)</para>
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<para> <literal>remote_minjitter</literal> Remote calculated jitter (minimum)</para>
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<para> <literal>remote_normdevjitter</literal>Remote calculated jitter (normal deviation)</para>
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<para> <literal>remote_stdevjitter</literal>Remote calculated jitter (standard deviation)</para>
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<para> <literal>remote_count</literal> Number of transmitted packets</para>
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<para> <literal>rtt</literal> Round trip time</para>
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<para> <literal>maxrtt</literal> Round trip time (maximum)</para>
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<para> <literal>minrtt</literal> Round trip time (minimum)</para>
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<para> <literal>normdevrtt</literal> Round trip time (normal deviation)</para>
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<para> <literal>stdevrtt</literal> Round trip time (standard deviation)</para>
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<para> <literal>all</literal> All statistics (in a form suited to logging,
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but not for parsing)</para>
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</enum>
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<enum name="rtpdest">
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<para>R/O Get remote RTP destination information.</para>
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<para> This option takes one additional argument:</para>
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<para> Argument 1:</para>
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<para> <literal>audio</literal> Get audio destination</para>
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<para> <literal>video</literal> Get video destination</para>
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<para> <literal>text</literal> Get text destination</para>
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</enum>
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</enumlist>
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<para><emphasis>chan_iax2</emphasis> provides the following additional options:</para>
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<enumlist>
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<enum name="peerip">
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<para>R/O Get the peer's ip address.</para>
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</enum>
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<enum name="peername">
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<para>R/O Get the peer's username.</para>
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</enum>
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</enumlist>
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<para><emphasis>chan_dahdi</emphasis> provides the following additional options:</para>
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<enumlist>
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<enum name="dahdi_channel">
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<para>R/O DAHDI channel related to this channel.</para>
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</enum>
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<enum name="dahdi_span">
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<para>R/O DAHDI span related to this channel.</para>
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</enum>
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<enum name="dahdi_type">
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<para>R/O DAHDI channel type, one of:</para>
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<enumlist>
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<enum name="analog" />
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<enum name="mfc/r2" />
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<enum name="pri" />
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<enum name="pseudo" />
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<enum name="ss7" />
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</enumlist>
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</enum>
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<enum name="keypad_digits">
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<para>R/O PRI Keypad digits that came in with the SETUP message.</para>
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</enum>
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<enum name="reversecharge">
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<para>R/O PRI Reverse Charging Indication, one of:</para>
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<enumlist>
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<enum name="-1"> <para>None</para></enum>
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<enum name=" 1"> <para>Reverse Charging Requested</para></enum>
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</enumlist>
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</enum>
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<enum name="no_media_path">
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<para>R/O PRI Nonzero if the channel has no B channel.
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The channel is either on hold or a call waiting call.</para>
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</enum>
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</enumlist>
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</parameter>
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</syntax>
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<description>
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<para>Gets/sets various pieces of information about the channel, additional <replaceable>item</replaceable> may
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be available from the channel driver; see its documentation for details. Any <replaceable>item</replaceable>
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requested that is not available on the current channel will return an empty string.</para>
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</description>
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</function>
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***/
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#define locked_copy_string(chan, dest, source, len) \
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do { \
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ast_channel_lock(chan); \
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ast_copy_string(dest, source, len); \
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ast_channel_unlock(chan); \
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} while (0)
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#define locked_string_field_set(chan, field, source) \
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do { \
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ast_channel_lock(chan); \
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ast_string_field_set(chan, field, source); \
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ast_channel_unlock(chan); \
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} while (0)
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static const char * const transfercapability_table[0x20] = {
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"SPEECH", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK",
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"DIGITAL", "RESTRICTED_DIGITAL", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK",
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"3K1AUDIO", "DIGITAL_W_TONES", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK",
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"VIDEO", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK", "UNK", };
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static int func_channel_read(struct ast_channel *chan, const char *function,
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char *data, char *buf, size_t len)
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{
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int ret = 0;
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char tmp[512];
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struct ast_format_cap *tmpcap;
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if (!strcasecmp(data, "audionativeformat")) {
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if ((tmpcap = ast_format_cap_get_type(chan->nativeformats, AST_FORMAT_TYPE_AUDIO))) {
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ast_copy_string(buf, ast_getformatname_multiple(tmp, sizeof(tmp), tmpcap), len);
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tmpcap = ast_format_cap_destroy(tmpcap);
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}
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} else if (!strcasecmp(data, "videonativeformat")) {
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if ((tmpcap = ast_format_cap_get_type(chan->nativeformats, AST_FORMAT_TYPE_VIDEO))) {
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ast_copy_string(buf, ast_getformatname_multiple(tmp, sizeof(tmp), tmpcap), len);
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tmpcap = ast_format_cap_destroy(tmpcap);
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}
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} else if (!strcasecmp(data, "audioreadformat")) {
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ast_copy_string(buf, ast_getformatname(&chan->readformat), len);
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} else if (!strcasecmp(data, "audiowriteformat")) {
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ast_copy_string(buf, ast_getformatname(&chan->writeformat), len);
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#ifdef CHANNEL_TRACE
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} else if (!strcasecmp(data, "trace")) {
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ast_channel_lock(chan);
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ast_copy_string(buf, ast_channel_trace_is_enabled(chan) ? "1" : "0", len);
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ast_channel_unlock(chan);
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#endif
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} else if (!strcasecmp(data, "tonezone") && chan->zone)
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locked_copy_string(chan, buf, chan->zone->country, len);
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else if (!strcasecmp(data, "language"))
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locked_copy_string(chan, buf, chan->language, len);
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else if (!strcasecmp(data, "musicclass"))
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locked_copy_string(chan, buf, chan->musicclass, len);
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else if (!strcasecmp(data, "name")) {
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locked_copy_string(chan, buf, chan->name, len);
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} else if (!strcasecmp(data, "parkinglot"))
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locked_copy_string(chan, buf, chan->parkinglot, len);
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else if (!strcasecmp(data, "state"))
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locked_copy_string(chan, buf, ast_state2str(chan->_state), len);
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else if (!strcasecmp(data, "channeltype"))
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locked_copy_string(chan, buf, chan->tech->type, len);
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else if (!strcasecmp(data, "accountcode"))
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locked_copy_string(chan, buf, chan->accountcode, len);
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else if (!strcasecmp(data, "checkhangup")) {
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ast_channel_lock(chan);
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ast_copy_string(buf, ast_check_hangup(chan) ? "1" : "0", len);
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ast_channel_unlock(chan);
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} else if (!strcasecmp(data, "peeraccount"))
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locked_copy_string(chan, buf, chan->peeraccount, len);
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else if (!strcasecmp(data, "hangupsource"))
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locked_copy_string(chan, buf, chan->hangupsource, len);
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else if (!strcasecmp(data, "appname") && chan->appl)
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locked_copy_string(chan, buf, chan->appl, len);
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else if (!strcasecmp(data, "appdata") && chan->data)
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locked_copy_string(chan, buf, chan->data, len);
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else if (!strcasecmp(data, "exten") && chan->data)
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locked_copy_string(chan, buf, chan->exten, len);
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else if (!strcasecmp(data, "context") && chan->data)
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locked_copy_string(chan, buf, chan->context, len);
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else if (!strcasecmp(data, "userfield") && chan->data)
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locked_copy_string(chan, buf, chan->userfield, len);
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else if (!strcasecmp(data, "channame") && chan->data)
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locked_copy_string(chan, buf, chan->name, len);
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else if (!strcasecmp(data, "linkedid")) {
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ast_channel_lock(chan);
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if (ast_strlen_zero(chan->linkedid)) {
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/* fall back on the channel's uniqueid if linkedid is unset */
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ast_copy_string(buf, chan->uniqueid, len);
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}
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else {
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ast_copy_string(buf, chan->linkedid, len);
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}
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ast_channel_unlock(chan);
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} else if (!strcasecmp(data, "peer")) {
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struct ast_channel *p;
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ast_channel_lock(chan);
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p = ast_bridged_channel(chan);
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if (p || chan->tech || chan->cdr) /* dummy channel? if so, we hid the peer name in the language */
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ast_copy_string(buf, (p ? p->name : ""), len);
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else {
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/* a dummy channel can still pass along bridged peer info via
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the BRIDGEPEER variable */
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const char *pname = pbx_builtin_getvar_helper(chan, "BRIDGEPEER");
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if (!ast_strlen_zero(pname))
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ast_copy_string(buf, pname, len); /* a horrible kludge, but... how else? */
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else
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buf[0] = 0;
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}
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ast_channel_unlock(chan);
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} else if (!strcasecmp(data, "uniqueid")) {
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locked_copy_string(chan, buf, chan->uniqueid, len);
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} else if (!strcasecmp(data, "transfercapability")) {
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locked_copy_string(chan, buf, transfercapability_table[chan->transfercapability & 0x1f], len);
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} else if (!strcasecmp(data, "callgroup")) {
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char groupbuf[256];
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locked_copy_string(chan, buf, ast_print_group(groupbuf, sizeof(groupbuf), chan->callgroup), len);
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} else if (!strcasecmp(data, "pickupgroup")) {
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char groupbuf[256];
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locked_copy_string(chan, buf, ast_print_group(groupbuf, sizeof(groupbuf), chan->pickupgroup), len);
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} else if (!strcasecmp(data, "amaflags")) {
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char amabuf[256];
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snprintf(amabuf,sizeof(amabuf), "%d", chan->amaflags);
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locked_copy_string(chan, buf, amabuf, len);
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} else if (!strncasecmp(data, "secure_bridge_", 14)) {
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struct ast_datastore *ds;
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ast_channel_lock(chan);
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if ((ds = ast_channel_datastore_find(chan, &secure_call_info, NULL))) {
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struct ast_secure_call_store *encrypt = ds->data;
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if (!strcasecmp(data, "secure_bridge_signaling")) {
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snprintf(buf, len, "%s", encrypt->signaling ? "1" : "");
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} else if (!strcasecmp(data, "secure_bridge_media")) {
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snprintf(buf, len, "%s", encrypt->media ? "1" : "");
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}
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}
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ast_channel_unlock(chan);
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} else if (!chan->tech || !chan->tech->func_channel_read || chan->tech->func_channel_read(chan, function, data, buf, len)) {
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ast_log(LOG_WARNING, "Unknown or unavailable item requested: '%s'\n", data);
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ret = -1;
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}
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return ret;
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}
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static int func_channel_write_real(struct ast_channel *chan, const char *function,
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char *data, const char *value)
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{
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int ret = 0;
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signed char gainset;
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if (!strcasecmp(data, "language"))
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locked_string_field_set(chan, language, value);
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else if (!strcasecmp(data, "parkinglot"))
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locked_string_field_set(chan, parkinglot, value);
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else if (!strcasecmp(data, "musicclass"))
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locked_string_field_set(chan, musicclass, value);
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else if (!strcasecmp(data, "accountcode"))
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locked_string_field_set(chan, accountcode, value);
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else if (!strcasecmp(data, "userfield"))
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locked_string_field_set(chan, userfield, value);
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else if (!strcasecmp(data, "amaflags")) {
|
|
ast_channel_lock(chan);
|
|
if(isdigit(*value)) {
|
|
sscanf(value, "%30d", &chan->amaflags);
|
|
} else if (!strcasecmp(value,"OMIT")){
|
|
chan->amaflags = 1;
|
|
} else if (!strcasecmp(value,"BILLING")){
|
|
chan->amaflags = 2;
|
|
} else if (!strcasecmp(value,"DOCUMENTATION")){
|
|
chan->amaflags = 3;
|
|
}
|
|
ast_channel_unlock(chan);
|
|
} else if (!strcasecmp(data, "peeraccount"))
|
|
locked_string_field_set(chan, peeraccount, value);
|
|
else if (!strcasecmp(data, "hangupsource"))
|
|
/* XXX - should we be forcing this here? */
|
|
ast_set_hangupsource(chan, value, 0);
|
|
#ifdef CHANNEL_TRACE
|
|
else if (!strcasecmp(data, "trace")) {
|
|
ast_channel_lock(chan);
|
|
if (ast_true(value))
|
|
ret = ast_channel_trace_enable(chan);
|
|
else if (ast_false(value))
|
|
ret = ast_channel_trace_disable(chan);
|
|
else {
|
|
ret = -1;
|
|
ast_log(LOG_WARNING, "Invalid value for CHANNEL(trace).");
|
|
}
|
|
ast_channel_unlock(chan);
|
|
}
|
|
#endif
|
|
else if (!strcasecmp(data, "tonezone")) {
|
|
struct ast_tone_zone *new_zone;
|
|
if (!(new_zone = ast_get_indication_zone(value))) {
|
|
ast_log(LOG_ERROR, "Unknown country code '%s' for tonezone. Check indications.conf for available country codes.\n", value);
|
|
ret = -1;
|
|
} else {
|
|
ast_channel_lock(chan);
|
|
if (chan->zone) {
|
|
chan->zone = ast_tone_zone_unref(chan->zone);
|
|
}
|
|
chan->zone = ast_tone_zone_ref(new_zone);
|
|
ast_channel_unlock(chan);
|
|
new_zone = ast_tone_zone_unref(new_zone);
|
|
}
|
|
} else if (!strcasecmp(data, "callgroup")) {
|
|
chan->callgroup = ast_get_group(value);
|
|
} else if (!strcasecmp(data, "pickupgroup")) {
|
|
chan->pickupgroup = ast_get_group(value);
|
|
} else if (!strcasecmp(data, "txgain")) {
|
|
sscanf(value, "%4hhd", &gainset);
|
|
ast_channel_setoption(chan, AST_OPTION_TXGAIN, &gainset, sizeof(gainset), 0);
|
|
} else if (!strcasecmp(data, "rxgain")) {
|
|
sscanf(value, "%4hhd", &gainset);
|
|
ast_channel_setoption(chan, AST_OPTION_RXGAIN, &gainset, sizeof(gainset), 0);
|
|
} else if (!strcasecmp(data, "transfercapability")) {
|
|
unsigned short i;
|
|
for (i = 0; i < 0x20; i++) {
|
|
if (!strcasecmp(transfercapability_table[i], value) && strcmp(value, "UNK")) {
|
|
chan->transfercapability = i;
|
|
break;
|
|
}
|
|
}
|
|
} else if (!strncasecmp(data, "secure_bridge_", 14)) {
|
|
struct ast_datastore *ds;
|
|
struct ast_secure_call_store *store;
|
|
|
|
if (!chan || !value) {
|
|
return -1;
|
|
}
|
|
|
|
ast_channel_lock(chan);
|
|
if (!(ds = ast_channel_datastore_find(chan, &secure_call_info, NULL))) {
|
|
if (!(ds = ast_datastore_alloc(&secure_call_info, NULL))) {
|
|
ast_channel_unlock(chan);
|
|
return -1;
|
|
}
|
|
if (!(store = ast_calloc(1, sizeof(*store)))) {
|
|
ast_channel_unlock(chan);
|
|
ast_free(ds);
|
|
return -1;
|
|
}
|
|
ds->data = store;
|
|
ast_channel_datastore_add(chan, ds);
|
|
} else {
|
|
store = ds->data;
|
|
}
|
|
ast_channel_unlock(chan);
|
|
|
|
if (!strcasecmp(data, "secure_bridge_signaling")) {
|
|
store->signaling = ast_true(value) ? 1 : 0;
|
|
} else if (!strcasecmp(data, "secure_bridge_media")) {
|
|
store->media = ast_true(value) ? 1 : 0;
|
|
}
|
|
} else if (!chan->tech->func_channel_write
|
|
|| chan->tech->func_channel_write(chan, function, data, value)) {
|
|
ast_log(LOG_WARNING, "Unknown or unavailable item requested: '%s'\n",
|
|
data);
|
|
ret = -1;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int func_channel_write(struct ast_channel *chan, const char *function, char *data, const char *value)
|
|
{
|
|
int res;
|
|
ast_chan_write_info_t write_info = {
|
|
.version = AST_CHAN_WRITE_INFO_T_VERSION,
|
|
.write_fn = func_channel_write_real,
|
|
.chan = chan,
|
|
.function = function,
|
|
.data = data,
|
|
.value = value,
|
|
};
|
|
|
|
res = func_channel_write_real(chan, function, data, value);
|
|
ast_channel_setoption(chan, AST_OPTION_CHANNEL_WRITE, &write_info, sizeof(write_info), 0);
|
|
|
|
return res;
|
|
}
|
|
|
|
static struct ast_custom_function channel_function = {
|
|
.name = "CHANNEL",
|
|
.read = func_channel_read,
|
|
.write = func_channel_write,
|
|
};
|
|
|
|
static int func_channels_read(struct ast_channel *chan, const char *function, char *data, char *buf, size_t maxlen)
|
|
{
|
|
struct ast_channel *c = NULL;
|
|
regex_t re;
|
|
int res;
|
|
size_t buflen = 0;
|
|
struct ast_channel_iterator *iter;
|
|
|
|
buf[0] = '\0';
|
|
|
|
if (!ast_strlen_zero(data)) {
|
|
if ((res = regcomp(&re, data, REG_EXTENDED | REG_ICASE | REG_NOSUB))) {
|
|
regerror(res, &re, buf, maxlen);
|
|
ast_log(LOG_WARNING, "Error compiling regular expression for %s(%s): %s\n", function, data, buf);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (!(iter = ast_channel_iterator_all_new())) {
|
|
if (!ast_strlen_zero(data)) {
|
|
regfree(&re);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
while ((c = ast_channel_iterator_next(iter))) {
|
|
ast_channel_lock(c);
|
|
if (ast_strlen_zero(data) || regexec(&re, c->name, 0, NULL, 0) == 0) {
|
|
size_t namelen = strlen(c->name);
|
|
if (buflen + namelen + (ast_strlen_zero(buf) ? 0 : 1) + 1 < maxlen) {
|
|
if (!ast_strlen_zero(buf)) {
|
|
strcat(buf, " ");
|
|
buflen++;
|
|
}
|
|
strcat(buf, c->name);
|
|
buflen += namelen;
|
|
} else {
|
|
ast_log(LOG_WARNING, "Number of channels exceeds the available buffer space. Output will be truncated!\n");
|
|
}
|
|
}
|
|
ast_channel_unlock(c);
|
|
c = ast_channel_unref(c);
|
|
}
|
|
|
|
ast_channel_iterator_destroy(iter);
|
|
|
|
if (!ast_strlen_zero(data)) {
|
|
regfree(&re);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct ast_custom_function channels_function = {
|
|
.name = "CHANNELS",
|
|
.read = func_channels_read,
|
|
};
|
|
|
|
static int func_mchan_read(struct ast_channel *chan, const char *function,
|
|
char *data, struct ast_str **buf, ssize_t len)
|
|
{
|
|
struct ast_channel *mchan = ast_channel_get_by_name(chan->linkedid);
|
|
char *template = alloca(4 + strlen(data));
|
|
sprintf(template, "${%s}", data); /* SAFE */
|
|
ast_str_substitute_variables(buf, len, mchan ? mchan : chan, template);
|
|
if (mchan) {
|
|
ast_channel_unref(mchan);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int func_mchan_write(struct ast_channel *chan, const char *function,
|
|
char *data, const char *value)
|
|
{
|
|
struct ast_channel *mchan = ast_channel_get_by_name(chan->linkedid);
|
|
pbx_builtin_setvar_helper(mchan ? mchan : chan, data, value);
|
|
if (mchan) {
|
|
ast_channel_unref(mchan);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct ast_custom_function mchan_function = {
|
|
.name = "MASTER_CHANNEL",
|
|
.read2 = func_mchan_read,
|
|
.write = func_mchan_write,
|
|
};
|
|
|
|
static int unload_module(void)
|
|
{
|
|
int res = 0;
|
|
|
|
res |= ast_custom_function_unregister(&channel_function);
|
|
res |= ast_custom_function_unregister(&channels_function);
|
|
res |= ast_custom_function_unregister(&mchan_function);
|
|
|
|
return res;
|
|
}
|
|
|
|
static int load_module(void)
|
|
{
|
|
int res = 0;
|
|
|
|
res |= ast_custom_function_register(&channel_function);
|
|
res |= ast_custom_function_register(&channels_function);
|
|
res |= ast_custom_function_register(&mchan_function);
|
|
|
|
return res;
|
|
}
|
|
|
|
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Channel information dialplan functions");
|