function validateIPv6($IP)
{
// fast exit for localhost
if (strlen($IP) < 3) {
return $IP == '::';
}
// Check if part is in IPv4 format
if (strpos($IP, '.')) {
$lastcolon = strrpos($IP, ':');
if (!($lastcolon && validateIPv4(substr($IP, $lastcolon + 1)))) {
return false;
}
// replace IPv4 part with dummy
$IP = substr($IP, 0, $lastcolon) . ':0:0';
}
// check uncompressed
if (strpos($IP, '::') === false) {
return preg_match('/^(?:[a-f0-9]{1,4}:){7}[a-f0-9]{1,4}$/i', $IP);
}
// check colon-count for compressed format
if (substr_count($IP, ':') < 8) {
return preg_match('/^(?::|(?:[a-f0-9]{1,4}:)+):(?:(?:[a-f0-9]{1,4}:)*[a-f0-9]{1,4})?$/i', $IP);
}
return false;
}
$Err_email = true;
}
} else {
$Err_email = true;
}
if (isset($_REQUEST["pass"])) {
if (check_pass($_REQUEST["email"], $_REQUEST["pass"])) {
$Err_pass = false;
} else {
$Err_pass = true;
}
} else {
$Err_pass = true;
}
if (isset($_REQUEST["ip"])) {
if (validateIPv4($_REQUEST["ip"]) || validateIPv6($_REQUEST["ip"])) {
$Err_ip = false;
} else {
$Err_ip = true;
}
} else {
$Err_ip = true;
}
if (isset($_REQUEST["name"])) {
if (check_computer($_REQUEST["name"], $_REQUEST["email"])) {
$Err_name = false;
} else {
$Err_name = true;
}
} else {
$Err_name = true;