Thu Apr 28 2011 17:13:27

Asterisk developer's documentation


app_channelredirect.c

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00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright (C) 2006, Sergey Basmanov
00005  *
00006  * See http://www.asterisk.org for more information about
00007  * the Asterisk project. Please do not directly contact
00008  * any of the maintainers of this project for assistance;
00009  * the project provides a web site, mailing lists and IRC
00010  * channels for your use.
00011  *
00012  * This program is free software, distributed under the terms of
00013  * the GNU General Public License Version 2. See the LICENSE file
00014  * at the top of the source tree.
00015  */
00016 
00017 /*! \file
00018  *
00019  * \brief ChannelRedirect application
00020  *
00021  * \author Sergey Basmanov <sergey_basmanov@mail.ru>
00022  *
00023  * \ingroup applications
00024  */
00025 
00026 #include "asterisk.h"
00027 
00028 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 172063 $")
00029 
00030 #include "asterisk/file.h"
00031 #include "asterisk/channel.h"
00032 #include "asterisk/pbx.h"
00033 #include "asterisk/module.h"
00034 #include "asterisk/lock.h"
00035 #include "asterisk/app.h"
00036 #include "asterisk/features.h"
00037 
00038 /*** DOCUMENTATION
00039    <application name="ChannelRedirect" language="en_US">
00040       <synopsis>
00041          Redirects given channel to a dialplan target
00042       </synopsis>
00043       <syntax>
00044          <parameter name="channel" required="true" />
00045          <parameter name="context" required="false" />
00046          <parameter name="extension" required="false" />
00047          <parameter name="priority" required="true" />
00048       </syntax>
00049       <description>
00050          <para>Sends the specified channel to the specified extension priority</para>
00051 
00052          <para>This application sets the following channel variables upon completion</para>
00053          <variablelist>
00054             <variable name="CHANNELREDIRECT_STATUS">
00055                <value name="NOCHANNEL" />
00056                <value name="SUCCESS" />
00057                <para>Are set to the result of the redirection</para>
00058             </variable>
00059          </variablelist>
00060       </description>
00061    </application>
00062  ***/
00063 static char *app = "ChannelRedirect";
00064 
00065 static int asyncgoto_exec(struct ast_channel *chan, void *data)
00066 {
00067    int res = -1;
00068    char *info;
00069    struct ast_channel *chan2 = NULL;
00070 
00071    AST_DECLARE_APP_ARGS(args,
00072       AST_APP_ARG(channel);
00073       AST_APP_ARG(label);
00074    );
00075 
00076    if (ast_strlen_zero(data)) {
00077       ast_log(LOG_WARNING, "%s requires an argument (channel,[[context,]exten,]priority)\n", app);
00078       return -1;
00079    }
00080 
00081    info = ast_strdupa(data);
00082    AST_STANDARD_APP_ARGS(args, info);
00083 
00084    if (ast_strlen_zero(args.channel) || ast_strlen_zero(args.label)) {
00085       ast_log(LOG_WARNING, "%s requires an argument (channel,[[context,]exten,]priority)\n", app);
00086       return -1;
00087    }
00088 
00089    chan2 = ast_get_channel_by_name_locked(args.channel);
00090    if (!chan2) {
00091       ast_log(LOG_WARNING, "No such channel: %s\n", args.channel);
00092       pbx_builtin_setvar_helper(chan, "CHANNELREDIRECT_STATUS", "NOCHANNEL");
00093       return 0;
00094    }
00095 
00096    if (chan2->pbx) {
00097       ast_set_flag(chan2, AST_FLAG_BRIDGE_HANGUP_DONT); /* don't let the after-bridge code run the h-exten */
00098    }
00099    res = ast_async_parseable_goto(chan2, args.label);
00100    pbx_builtin_setvar_helper(chan, "CHANNELREDIRECT_STATUS", "SUCCESS");
00101    ast_channel_unlock(chan2);
00102 
00103    return res;
00104 }
00105 
00106 static int unload_module(void)
00107 {
00108    return ast_unregister_application(app);
00109 }
00110 
00111 static int load_module(void)
00112 {
00113    return ast_register_application_xml(app, asyncgoto_exec) ?
00114       AST_MODULE_LOAD_DECLINE : AST_MODULE_LOAD_SUCCESS;
00115 }
00116 
00117 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Redirects a given channel to a dialplan target");