*
* @return integer Number of mask bits
* @throws Exception
*/
/*********************** TESTING *******************************/
print netmask2bitmask('255.255.255.255');
print netmask2bitmask('255.255.255.0');
print netmask2bitmask('255.255.0.0');
print netmask2bitmask('255.0.0.0');
print netmask2bitmask('0.0.0.0');
print netmask2bitmask('255.255.255.192');
print netmask2bitmask('255.255.255.128');
print netmask2bitmask('255.255.255.gh');
print netmask2bitmask('ffff:ffff:ffff:ffc0:0:0:0:0');
print netmask2bitmask('ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff');
print netmask2bitmask('ffff:ffff:ffff:ffc0:0:0:0:h');
/*****************************************************************/
function netmask2bitmask($netmask)
{
try {
echo "Net mask: " . $netmask . "<br/>";
//validate $netmask
if (filter_var($netmask, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) !== false) {
return calculateIpv4($netmask);
}
if (filter_var($netmask, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) === false) {
throw new Exception("Invalid Net Mask!!!");
}
calculateIpv6($netmask);
} catch (Exception $e) {
print $e->getMessage() . "<br/><br/>";
function netmask2bitmask($netmask)
{
try {
// Validate if $netmask is string
if (gettype($netmask) !== "string") {
throw new Exception("Netmask is not a string");
}
// Validate if $netmask is IPV4 or IPV6 address
if (filter_var($netmask, FILTER_VALIDATE_IP) === false) {
throw new Exception("Netmask is not a IPV4 or IPV6 valid address");
}
// Split string into octets or hextets
$array = preg_split("/\\.|\\:/", $netmask);
// Convert to binary, delete zeros and get length of resultant string
if (filter_var($netmask, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) === $netmask) {
$func = function ($number) {
return strlen(str_replace("0", "", decbin($number)));
};
} else {
$func = function ($hexa) {
return strlen(str_replace("0", "", decbin(base_convert($hexa, 16, 10))));
};
}
return array_sum(array_map($func, $array));
} catch (Exception $ex) {
print $ex->getMessage();
}
}
print netmask2bitmask('255.255.0.0') . "\n";
print netmask2bitmask('ffff:ffff:ffff:ffc0:0:0:0:0') . "\n";
$isIpV4 = true;
}
}
if (!$isIpV4 && !$isIpV6) {
throw new Exception("Please type a valid <b>Netmask</b>.");
}
if ($isIpV6) {
$array = explode(":", $netmask);
$array = array_filter($array);
foreach ($array as $value) {
$number += strlen(rtrim(base_convert($value, 16, 2), '0'));
}
echo $number;
}
if ($isIpV4) {
if ($netmask === "0.0.0.0") {
echo "0";
return;
}
$long = ip2long($netmask);
$base = ip2long('255.255.255.255');
echo 32 - log(($long ^ $base) + 1, 2);
}
}
if (isset($_POST['netmask'])) {
try {
netmask2bitmask($_POST['netmask']);
} catch (Exception $e) {
echo '<h2><b>Message:</b></h2> ' . $e->getMessage();
}
}
}
}
}
function validateipv6($ip)
{
if (!filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) === false) {
return true;
}
return false;
}
echo "Resultado 1 255.255.0.0 : ";
print netmask2bitmask('255.255.0.0') . "<br>";
//16
echo "Resultado 2 255.254.0.0 : ";
print netmask2bitmask('255.254.0.0') . "<br>";
//15
echo "Resultado 3 255.252.0.0 : ";
print netmask2bitmask('255.252.0.0') . "<br>";
//14
echo "Resultado 4 255.248.0.0 : ";
print netmask2bitmask('255.248.0.0') . "<br>";
//14
echo "Resultado 5 255.240.0.0 : ";
print netmask2bitmask('255.240.0.0') . "<br>";
//14
echo "Resultado 2 : ";
print netmask2bitmask('ffff:ffff:ffff:ffc0:0:0:0:0') . "<br>";
//58 is a valid ipv6
echo "Resultado 2 : ";
print netmask2bitmask(':ffff:ffff:ffc0:0:0:0:0') . "<br>";
//this is not a valid ipv6
