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