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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: 411314 $")
#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>
<function name="VALID_EXTEN" language="en_US">
<synopsis>
Determine whether an extension exists or not.
</synopsis>
<syntax>
<parameter name="context">
<para>Defaults to the current context</para>
</parameter>
<parameter name="extension" required="true" />
<parameter name="priority">
<para>Priority defaults to <literal>1</literal>.</para>
</parameter>
</syntax>
<description>
<para>Returns a true value if the indicated <replaceable>context</replaceable>,
<replaceable>extension</replaceable>, and <replaceable>priority</replaceable> exist.</para>
<warning><para>This function has been deprecated in favor of the <literal>DIALPLAN_EXISTS()</literal> function</para></warning>
</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,
!chan ? NULL :
S_COR(ast_channel_caller(chan)->id.number.valid, ast_channel_caller(chan)->id.number.str, NULL));
if (res)
strcpy(buf, "1");
} else {
int res;
res = ast_findlabel_extension(chan, args.context, args.exten, args.priority,
!chan ? NULL :
S_COR(ast_channel_caller(chan)->id.number.valid, ast_channel_caller(chan)->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,
!chan ? NULL :
S_COR(ast_channel_caller(chan)->id.number.valid, ast_channel_caller(chan)->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 int acf_isexten_exec(struct ast_channel *chan, const char *cmd, char *parse, char *buffer, size_t buflen)
{
int priority_int;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(context);
AST_APP_ARG(extension);
AST_APP_ARG(priority);
);
if (!chan) {
ast_log(LOG_WARNING, "No channel was provided to %s function.\n", cmd);
return -1;
}
AST_STANDARD_APP_ARGS(args, parse);
if (ast_strlen_zero(args.context)) {
args.context = ast_strdupa(ast_channel_context(chan));
}
if (ast_strlen_zero(args.extension)) {
ast_log(LOG_WARNING, "Syntax: VALID_EXTEN([<context>],<extension>[,<priority>]) - missing argument <extension>!\n");
return -1;
}
if (ast_strlen_zero(args.priority)) {
priority_int = 1;
} else {
priority_int = atoi(args.priority);
}
if (ast_exists_extension(chan, args.context, args.extension, priority_int,
S_COR(ast_channel_caller(chan)->id.number.valid, ast_channel_caller(chan)->id.number.str, NULL))) {
ast_copy_string(buffer, "1", buflen);
} else {
ast_copy_string(buffer, "0", buflen);
}
return 0;
}
static struct ast_custom_function isexten_function = {
.name = "DIALPLAN_EXISTS",
.read = isexten_function_read,
.read_max = 2,
};
static struct ast_custom_function acf_isexten = {
.name = "VALID_EXTEN",
.read = acf_isexten_exec,
};
static int unload_module(void)
{
int res = ast_custom_function_unregister(&isexten_function);
res |= ast_custom_function_unregister(&acf_isexten);
return res;
}
static int load_module(void)
{
int res = ast_custom_function_register(&isexten_function);
res |= ast_custom_function_register(&acf_isexten);
return res;
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Dialplan Context/Extension/Priority Checking Functions",
.load = load_module,
.unload = unload_module,
.load_pri = AST_MODPRI_APP_DEPEND,
);
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