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122 lines
3.0 KiB
122 lines
3.0 KiB
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2007, 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 Dialplan group functions check if a dialplan entry exists
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*
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* \author Gregory Nietsky AKA irroot <gregory@networksentry.co.za>
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* \author Russell Bryant <russell@digium.com>
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*
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* \ingroup functions
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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/module.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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/*** DOCUMENTATION
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<function name="DIALPLAN_EXISTS" language="en_US">
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<synopsis>
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Checks the existence of a dialplan target.
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</synopsis>
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<syntax>
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<parameter name="context" required="true" />
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<parameter name="extension" />
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<parameter name="priority" />
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</syntax>
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<description>
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<para>This function returns <literal>1</literal> if the target exits. Otherwise, it returns <literal>0</literal>.</para>
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</description>
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</function>
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***/
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static int isexten_function_read(struct ast_channel *chan, const char *cmd, char *data,
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char *buf, size_t len)
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{
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char *parse;
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AST_DECLARE_APP_ARGS(args,
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AST_APP_ARG(context);
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AST_APP_ARG(exten);
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AST_APP_ARG(priority);
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);
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strcpy(buf, "0");
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if (ast_strlen_zero(data)) {
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ast_log(LOG_ERROR, "DIALPLAN_EXISTS() requires an argument\n");
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return -1;
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}
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parse = ast_strdupa(data);
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AST_STANDARD_APP_ARGS(args, parse);
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if (!ast_strlen_zero(args.priority)) {
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int priority_num;
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if (sscanf(args.priority, "%30d", &priority_num) == 1 && priority_num > 0) {
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int res;
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res = ast_exists_extension(chan, args.context, args.exten, priority_num,
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chan->cid.cid_num);
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if (res)
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strcpy(buf, "1");
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} else {
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int res;
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res = ast_findlabel_extension(chan, args.context, args.exten,
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args.priority, chan->cid.cid_num);
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if (res > 0)
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strcpy(buf, "1");
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}
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} else if (!ast_strlen_zero(args.exten)) {
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int res;
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res = ast_exists_extension(chan, args.context, args.exten, 1,
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chan->cid.cid_num);
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if (res)
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strcpy(buf, "1");
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} else if (!ast_strlen_zero(args.context)) {
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if (ast_context_find(args.context))
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strcpy(buf, "1");
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} else {
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ast_log(LOG_ERROR, "Invalid arguments provided to DIALPLAN_EXISTS\n");
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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 struct ast_custom_function isexten_function = {
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.name = "DIALPLAN_EXISTS",
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.read = isexten_function_read,
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.read_max = 2,
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};
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static int unload_module(void)
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{
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return ast_custom_function_unregister(&isexten_function);
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}
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static int load_module(void)
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{
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return ast_custom_function_register(&isexten_function);
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Dialplan Context/Extension/Priority Checking Functions");
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