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<?php
/*
** ZABBIX
** Copyright (C) 2000-2006 SIA Zabbix
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**/
?>
<?php
function BETWEEN($min,$max)
{
return "({}>=$min&&{}<=$max)&&";
}
function GT($value)
{
return "({}>=$value)&&";
}
function IN($array)
{
return "in_array({},array($array))&&";
}
define("NOT_EMPTY","({}!='')&&");
// VAR TYPE OPTIONAL FLAGS VALIDATION EXCEPTION
function calc_exp($fields,$field,$expression)
{
global $_REQUEST;
if(strstr($expression,"{}"))
{
if(!isset($_REQUEST[$field])) return FALSE;
}
$expression = str_replace("{}",'$_REQUEST["'.$field.'"]',$expression);
foreach($fields as $f => $checks)
{
// If an unset variable used in expression, return FALSE
if(strstr($expression,'{'.$f.'}')&&!isset($_REQUEST[$f]))
{
// info("Variable is not set. $expression is FALSE");
return FALSE;
}
// echo $f,":",$expression,"<br>";
$expression = str_replace('{'.$f.'}','$_REQUEST["'.$f.'"]',$expression);
}
$expression=rtrim($expression,"&");
if($expression[strlen($expression)-1]=='&') $expression[strlen($expression)-1]=0;
if($expression[strlen($expression)-1]=='&') $expression[strlen($expression)-1]=0;
$exec = "return ".$expression.";";
// info($exec);
return eval($exec);
}
function unset_not_in_list(&$fields)
{
foreach($_REQUEST as $key => $val)
{
if(!isset($fields[$key]))
{
// info("Unset:".$key);
unset($_REQUEST[$key]);
}
}
}
function unset_action_vars($fields)
{
foreach($fields as $field => $checks)
{
list($type,$opt,$flags,$validation,$exception)=$checks;
if(($flags&P_ACT)&&(isset($_REQUEST[$field])))
{
// info("Unset:".$field);
unset($_REQUEST[$field]);
}
}
}
function unset_all()
{
foreach($_REQUEST as $key => $val)
{
unset($_REQUEST[$key]);
}
}
function check_fields(&$fields)
{
global $_REQUEST;
$ret = TRUE;
$critical = FALSE;
foreach($fields as $field => $checks)
{
list($type,$opt,$flags,$validation,$exception)=$checks;
// info("Field: $field");
if($exception==NULL) $except=FALSE;
else $except=calc_exp($fields,$field,$exception);
if($opt == O_MAND && $except) $opt = O_NO;
else if($opt == O_OPT && $except) $opt = O_MAND;
else if($opt == O_NO && $except) $opt = O_MAND;
if($opt == O_MAND)
{
if(!isset($_REQUEST[$field]))
{
$ret = FALSE;
info("Warning. Field [".$field."] is mandatory");
if($flags&P_SYS)
{
info("Critical error. Field [".$field."] is mandatory");
unset_all();
$critical = TRUE;
break;
}
else continue;
}
}
if($opt == O_NO)
{
if(isset($_REQUEST[$field]))
{
$ret = FALSE;
info("Warning. Field [".$field."] must be missing");
if($flags&P_SYS)
{
info("Critical error. Field [".$field."] must be missing");
unset_all();
$critical = TRUE;
break;
}
else continue;
}
else continue;
}
if($opt == O_OPT)
{
if(!isset($_REQUEST[$field])) continue;
}
if( ($type == T_ZBX_INT) && !is_numeric($_REQUEST[$field])) {
$ret = FALSE;
info("Warning. Field [".$field."] is not integer");
if($flags&P_SYS)
{
info("Critical error. Field [".$field."] is not integer");
unset_all();
$critical = TRUE;
break;
}
else continue;
}
if( ($type == T_ZBX_DBL) && !is_numeric($_REQUEST[$field])) {
$ret = FALSE;
info("Warning. Field [".$field."] is not double");
if($flags&P_SYS)
{
info("Critical error. Field [".$field."] is not double");
unset_all();
$critical = TRUE;
break;
}
else continue;
}
if(($exception==NULL)||($except==TRUE))
{
if(!$validation) $valid=TRUE;
else $valid=calc_exp($fields,$field,$validation);
if(!$valid)
{
$ret = FALSE;
info("Warning. Incorrect value for [".$field."]");
if($flags&P_SYS)
{
info("Critical error. Incorrect value for [".$field."]");
unset_all();
$critical = TRUE;
break;
}
else continue;
}
}
if(isset($_REQUEST[$field])&&!get_magic_quotes_gpc()) {
$_REQUEST[$field]=addslashes($_REQUEST[$field]);
}
}
unset_not_in_list($fields);
if($critical)
{
show_messages(FALSE, "", "Invalid URL");
show_page_footer();
exit;
}
if(!$ret)
{
unset_action_vars($fields);
}
show_messages();
return $ret;
}
?>
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