private UntypedReceive WaitingForPrefix(IHandleEventListener el, IO.ByteString buffer)
{
if (buffer.Count >= 4)
{
var length = buffer.Iterator().GetInt();
return WaitingForBody(el, buffer.Drop(4), length);
}
return message =>
{
if (message is Tcp.Received)
{
var received = message as Tcp.Received;
Become(WaitingForPrefix(el, buffer.Concat(received.Data)));
}
else HandleWrite(message);
};
}