e6b2e9a750
This patch adds 'const' tags to a number of Asterisk APIs where they are appropriate (where the API already demanded that the function argument not be modified, but the compiler was not informed of that fact). The list includes: - CLI command handlers - CLI command handler arguments - AGI command handlers - AGI command handler arguments - Dialplan application handler arguments - Speech engine API function arguments In addition, various file-scope and function-scope constant arrays got 'const' and/or 'static' qualifiers where they were missing. Review: https://reviewboard.asterisk.org/r/251/ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@196072 65c4cc65-6c06-0410-ace0-fbb531ad65f3
143 lines
3.5 KiB
C
143 lines
3.5 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@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 Transfer a caller
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*
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* \author Mark Spencer <markster@digium.com>
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*
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* Requires transfer support from channel driver
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*
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* \ingroup applications
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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/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/app.h"
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#include "asterisk/channel.h"
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/*** DOCUMENTATION
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<application name="Transfer" language="en_US">
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<synopsis>
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Transfer caller to remote extension.
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</synopsis>
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<syntax>
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<parameter name="dest" required="true" argsep="/">
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<argument name="Tech" />
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<argument name="destination" required="true" />
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</parameter>
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</syntax>
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<description>
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<para>Requests the remote caller be transferred
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to a given destination. If TECH (SIP, IAX2, LOCAL etc) is used, only
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an incoming call with the same channel technology will be transfered.
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Note that for SIP, if you transfer before call is setup, a 302 redirect
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SIP message will be returned to the caller.</para>
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<para>The result of the application will be reported in the <variable>TRANSFERSTATUS</variable>
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channel variable:</para>
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<variablelist>
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<variable name="TRANSFERSTATUS">
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<value name="SUCCESS">
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Transfer succeeded.
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</value>
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<value name="FAILURE">
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Transfer failed.
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</value>
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<value name="UNSUPPORTED">
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Transfer unsupported by channel driver.
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</value>
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</variable>
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</variablelist>
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</description>
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</application>
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***/
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static const char * const app = "Transfer";
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static int transfer_exec(struct ast_channel *chan, const char *data)
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{
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int res;
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int len;
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char *slash;
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char *tech = NULL;
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char *dest = NULL;
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char *status;
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char *parse;
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AST_DECLARE_APP_ARGS(args,
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AST_APP_ARG(dest);
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);
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if (ast_strlen_zero((char *)data)) {
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ast_log(LOG_WARNING, "Transfer requires an argument ([Tech/]destination)\n");
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pbx_builtin_setvar_helper(chan, "TRANSFERSTATUS", "FAILURE");
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return 0;
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} else
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parse = ast_strdupa(data);
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AST_STANDARD_APP_ARGS(args, parse);
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dest = args.dest;
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if ((slash = strchr(dest, '/')) && (len = (slash - dest))) {
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tech = dest;
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dest = slash + 1;
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/* Allow execution only if the Tech/destination agrees with the type of the channel */
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if (strncasecmp(chan->tech->type, tech, len)) {
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pbx_builtin_setvar_helper(chan, "TRANSFERSTATUS", "FAILURE");
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return 0;
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}
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}
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/* Check if the channel supports transfer before we try it */
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if (!chan->tech->transfer) {
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pbx_builtin_setvar_helper(chan, "TRANSFERSTATUS", "UNSUPPORTED");
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return 0;
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}
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res = ast_transfer(chan, dest);
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if (res < 0) {
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status = "FAILURE";
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res = 0;
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} else {
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status = "SUCCESS";
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res = 0;
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}
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pbx_builtin_setvar_helper(chan, "TRANSFERSTATUS", status);
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return res;
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}
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static int unload_module(void)
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{
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return ast_unregister_application(app);
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}
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static int load_module(void)
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{
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return ast_register_application_xml(app, transfer_exec);
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Transfers a caller to another extension");
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