private static int ReceiveBlock(Socket s, out byte[] data)
{
// Type
int type = BitConverter.ToInt32(s.ReceiveAll(4), 0);
// Length
int len = BitConverter.ToInt32(s.ReceiveAll(4), 0);
// Value
data = len > 0 ? s.ReceiveAll(len) : new byte[0];
return type;
}