app_channelredirect.c

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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2006, Sergey Basmanov
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*! \file
 *
 * \brief ChannelRedirect application
 *
 * \author Sergey Basmanov <[email protected]>
 *
 * \ingroup applications
 */

/*** MODULEINFO
   <support_level>core</support_level>
 ***/

#include "asterisk.h"

#include "asterisk/file.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/lock.h"
#include "asterisk/app.h"
#include "asterisk/features.h"

/*** DOCUMENTATION
   <application name="ChannelRedirect" language="en_US">
      <synopsis>
         Redirects given channel to a dialplan target
      </synopsis>
      <syntax>
         <parameter name="channel" required="true" />
         <parameter name="context" required="false" />
         <parameter name="extension" required="false" />
         <parameter name="priority" required="true" />
      </syntax>
      <description>
         <para>Sends the specified channel to the specified extension priority</para>

         <para>This application sets the following channel variables upon completion</para>
         <variablelist>
            <variable name="CHANNELREDIRECT_STATUS">
               <value name="NOCHANNEL" />
               <value name="SUCCESS" />
               <para>Are set to the result of the redirection</para>
            </variable>
         </variablelist>
      </description>
   </application>
 ***/
static const char app[] = "ChannelRedirect";

static int asyncgoto_exec(struct ast_channel *chan, const char *data)
{
   int res = -1;
   char *info;
   struct ast_channel *chan2 = NULL;

   AST_DECLARE_APP_ARGS(args,
      AST_APP_ARG(channel);
      AST_APP_ARG(label);
   );

   if (ast_strlen_zero(data)) {
      ast_log(LOG_WARNING, "%s requires an argument (channel,[[context,]exten,]priority)\n", app);
      return -1;
   }

   info = ast_strdupa(data);
   AST_STANDARD_APP_ARGS(args, info);

   if (ast_strlen_zero(args.channel) || ast_strlen_zero(args.label)) {
      ast_log(LOG_WARNING, "%s requires an argument (channel,[[context,]exten,]priority)\n", app);
      return -1;
   }

   if (!(chan2 = ast_channel_get_by_name(args.channel))) {
      ast_log(LOG_WARNING, "No such channel: %s\n", args.channel);
      pbx_builtin_setvar_helper(chan, "CHANNELREDIRECT_STATUS", "NOCHANNEL");
      return 0;
   }

   res = ast_async_parseable_goto(chan2, args.label);

   chan2 = ast_channel_unref(chan2);

   pbx_builtin_setvar_helper(chan, "CHANNELREDIRECT_STATUS", "SUCCESS");

   return res;
}

static int unload_module(void)
{
   return ast_unregister_application(app);
}

static int load_module(void)
{
   return ast_register_application_xml(app, asyncgoto_exec) ?
      AST_MODULE_LOAD_DECLINE : AST_MODULE_LOAD_SUCCESS;
}

AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Redirects a given channel to a dialplan target");