4 * Validates an IPv6 address.
5 * @author Feyd @ forums.devnetwork.net (public domain)
6 * @note This function requires brackets to have been removed from address
9 class HTMLPurifier_AttrDef_URI_IPv6 extends HTMLPurifier_AttrDef_URI_IPv4
14 * @param HTMLPurifier_Config $config
15 * @param HTMLPurifier_Context $context
18 public function validate($aIP, $config, $context)
27 $blk = '(?:' . $hex . '{1,4})';
28 $pre = '(?:/(?:12[0-8]|1[0-1][0-9]|[1-9][0-9]|[0-9]))'; // /0 - /128
31 if (strpos($aIP, '/') !== false) {
32 if (preg_match('#' . $pre . '$#s', $aIP, $find)) {
33 $aIP = substr($aIP, 0, 0 - strlen($find[0]));
40 // IPv4-compatiblity check
41 if (preg_match('#(?<=:' . ')' . $this->ip4 . '$#s', $aIP, $find)) {
42 $aIP = substr($aIP, 0, 0 - strlen($find[0]));
43 $ip = explode('.', $find[0]);
44 $ip = array_map('dechex', $ip);
45 $aIP .= $ip[0] . $ip[1] . ':' . $ip[2] . $ip[3];
50 $aIP = explode('::', $aIP);
55 list($first, $second) = $aIP;
56 $first = explode(':', $first);
57 $second = explode(':', $second);
59 if (count($first) + count($second) > 8) {
63 while (count($first) < 8) {
64 array_push($first, '0');
67 array_splice($first, 8 - count($second), 8, $second);
69 unset($first, $second);
71 $aIP = explode(':', $aIP[0]);
79 // All the pieces should be 16-bit hex strings. Are they?
80 foreach ($aIP as $piece) {
81 if (!preg_match('#^[0-9a-fA-F]{4}$#s', sprintf('%04s', $piece))) {