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<?php
/*
** Zabbix
** Copyright (C) 2001-2016 Zabbix SIA
**
** 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
/**
* Class containing methods for IP address validation.
*/
class CIPValidator extends CValidator {
/**
* Checks if the given IP address is a valid IPv4 or IPv6 address. If IP address is invalid, sets an error
* and returns false. Otherwise returns true.
*
* @param string $ip
*
* @return bool
*/
public function validate($ip) {
if (!is_string($ip)) {
$this->setError(_s('Invalid IP address "%1$s": must be a string.', $this->stringify($ip)));
return false;
}
if ($ip === '') {
$this->setError(_('IP address cannot be empty.'));
return false;
}
if (!$this->isValidIPv4($ip) && !$this->isValidIPv6($ip)) {
$this->setError(_s('Invalid IP address "%1$s".', $ip));
return false;
}
return true;
}
/**
* Validate IPv4 address.
*
* @param string $ip
*
* @return bool
*/
protected function isValidIPv4($ip) {
if (!preg_match('/^([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$/', $ip, $matches)) {
return false;
}
for ($i = 1; $i <= 4; $i++) {
if ($matches[$i] > 255) {
return false;
}
}
return true;
}
/**
* Validate IPv6 address.
*
* @param string $ip
*
* @return bool
*/
protected function isValidIPv6($ip) {
if (!ZBX_HAVE_IPV6) {
return false;
}
$patterns = [
'([a-f0-9]{1,4}:){7}[a-f0-9]{1,4}',
':(:[a-f0-9]{1,4}){1,7}',
'[a-f0-9]{1,4}::([a-f0-9]{1,4}:){0,5}[a-f0-9]{1,4}',
'([a-f0-9]{1,4}:){2}:([a-f0-9]{1,4}:){0,4}[a-f0-9]{1,4}',
'([a-f0-9]{1,4}:){3}:([a-f0-9]{1,4}:){0,3}[a-f0-9]{1,4}',
'([a-f0-9]{1,4}:){4}:([a-f0-9]{1,4}:){0,2}[a-f0-9]{1,4}',
'([a-f0-9]{1,4}:){5}:([a-f0-9]{1,4}:){0,1}[a-f0-9]{1,4}',
'([a-f0-9]{1,4}:){6}:[a-f0-9]{1,4}',
'([a-f0-9]{1,4}:){1,7}:',
'::'
];
$pattern = '/^('.implode(')$|^(', $patterns).')$/i';
if (!preg_match($pattern, $ip)) {
return false;
}
return true;
}
}
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