}
@addr = split(/\./, $ADR);
$ADR = pack('C4', @addr);
$MSK = pack('N4', -1 << (32 - $LEN));
$BRD = join(".", unpack('C4', $ADR | ~$MSK));
}
@addr = split(/\./, $ADR);
$ADR = pack('C4', @addr);
$MSK = pack('N4', -1 << (32 - $LEN));
$BRD = join(".", unpack('C4', $ADR | ~$MSK));