// streaming connections are per-session and have a fixed version. we can't do anything with a wrong-version stream connection, so drop it.
if (version != StreamMessage.CURRENT_VERSION)
throw new IOException(String.format("Received stream using protocol version %d (my version %d). Terminating connection", version, MessagingService.current_version));
DataInput input = new DataInputStream(socket.getInputStream());
StreamInitMessage init = StreamInitMessage.serializer.deserialize(input, version);
// The initiator makes two connections, one for incoming and one for outgoing.
// The receiving side distinguish two connections by looking at StreamInitMessage#isForOutgoing.
// Note: we cannot use the same socket for incoming and outgoing streams because we want to
// parallelize said streams and the socket is blocking, so we might deadlock.