1: <?php
 2: 
 3: /**
 4:  * Jyxo PHP Library
 5:  *
 6:  * LICENSE
 7:  *
 8:  * This source file is subject to the new BSD license that is bundled
 9:  * with this package in the file license.txt.
10:  * It is also available through the world-wide-web at this URL:
11:  * https://github.com/jyxo/php/blob/master/license.txt
12:  */
13: 
14: /**
15:  * Validates a IPv6 address.
16:  *
17:  * @category Jyxo
18:  * @package Jyxo_Input
19:  * @subpackage Validator
20:  * @copyright Copyright (c) 2005-2011 Jyxo, s.r.o.
21:  * @license https://github.com/jyxo/php/blob/master/license.txt
22:  * @author Jaroslav Hanslík
23:  */
24: class Jyxo_Input_Validator_IsIpV6 extends Jyxo_Input_Validator_AbstractValidator
25: {
26:     /**
27:      * Validates a value.
28:      *
29:      * @param mixed $value Input value
30:      * @return boolean
31:      */
32:     public function isValid($value)
33:     {
34:         $pattern8bit = '(?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]?[0-9])';
35:         $patternIpV4 = '(?:' . $pattern8bit . '(?:[.]' . $pattern8bit . '){3})';
36: 
37:         // a:b:c:d:e:f:g:h
38:         $patternIpV6Variant8Hex = '(?:(?:[0-9a-f]{1,4}:){7}[0-9a-f]{1,4})';
39:         // Compressed a::b
40:         $patternIpV6VariantCompressedHex = '(?:(?:(?:[0-9a-f]{1,4}(?::[0-9a-f]{1,4})*)?)::(?:(?:[0-9a-f]{1,4}(?::[0-9a-f]{1,4})*)?))';
41:         // IPv4 mapped to IPv6 a:b:c:d:e:f:w.x.y.z
42:         $patternIpV6VariantHex4Dec = '(?:(?:(?:[0-9a-f]{1,4}:){6})' . $patternIpV4 . ')';
43:         // Compressed IPv4 mapped to IPv6 a::b:w.x.y.z
44:         $patternIpV6VariantCompressedHex4Dec = '(?:(?:(?:[0-9a-f]{1,4}(?::[0-9a-f]{1,4})*)?)::(?:(?:[0-9a-f]{1,4}:)*)' . $patternIpV4 . ')';
45:         $patternIpV6 = '(?:' . $patternIpV6Variant8Hex . '|' . $patternIpV6VariantCompressedHex . '|' . $patternIpV6VariantHex4Dec . '|' . $patternIpV6VariantCompressedHex4Dec . ')';
46: 
47:         if (!preg_match('~^' . $patternIpV6 . '$~', (string) $value)) {
48:             return false;
49:         }
50: 
51:         return true;
52:     }
53: }
54: