/**
* Convert a network specification in CIDR notation to an integer network and a number of bits
*/
public static function parseCIDR($range)
{
$parts = explode('/', $range, 2);
if (count($parts) != 2) {
return array(false, false);
}
$network = IP::toSigned($parts[0]);
if ($network !== false && is_numeric($parts[1]) && $parts[1] >= 0 && $parts[1] <= 32) {
$bits = $parts[1];
if ($bits == 0) {
$network = 0;
} else {
$network &= ~((1 << 32 - $bits) - 1);
}
# Convert to unsigned
if ($network < 0) {
$network += pow(2, 32);
}
} else {
$network = false;
$bits = false;
}
return array($network, $bits);
}
