/**
* Checks an IPv6 adress
*
* Checks if the given IP is IPv6-compatible
*
* @param String $ip a valid IPv6-adress
*
* @return Boolean true if $ip is an IPv6 adress
* @access public
* @static
*/
public static function checkIPv6($ip)
{
$elements = Net_IPv6::separate($ip);
$ip = $elements[0];
if ('' != $elements[1] && (!is_numeric($elements[1]) || 0 > $elements || 128 < $elements[1])) {
return false;
}
$ipPart = Net_IPv6::SplitV64($ip);
$count = 0;
if (!empty($ipPart[0])) {
$ipv6 = explode(':', $ipPart[0]);
foreach ($ipv6 as $element) {
// made a validate precheck
if (!preg_match('/[0-9a-fA-F]*/', $element)) {
return false;
}
}
for ($i = 0; $i < count($ipv6); $i++) {
if (4 < strlen($ipv6[$i])) {
return false;
}
$dec = hexdec($ipv6[$i]);
$hex = strtoupper(preg_replace("/^[0]{1,3}(.*[0-9a-fA-F])\$/", "\\1", $ipv6[$i]));
if ($ipv6[$i] >= 0 && $dec <= 65535 && $hex == strtoupper(dechex($dec))) {
$count++;
}
}
if (8 == $count) {
return true;
} else {
if (6 == $count and !empty($ipPart[1])) {
$ipv4 = explode('.', $ipPart[1]);
$count = 0;
for ($i = 0; $i < count($ipv4); $i++) {
if ($ipv4[$i] >= 0 && (int) $ipv4[$i] <= 255 && preg_match("/^\\d{1,3}\$/", $ipv4[$i])) {
$count++;
}
}
if (4 == $count) {
return true;
}
} else {
return false;
}
}
} else {
return false;
}
}
/**
* Returns a possible existing prefix length/netmask specification on an IP addresse.
*
* @param String $ip the (compressed) IP as Hex representation
*
* @return String the netmask spec
* @since 1.1.0
* @access public
* @static
*/
function getNetmaskSpec($ip)
{
$elements = Net_IPv6::separate($ip);
return $elements[1];
}