private void HandleRead(SelectionKey key)
{
try
{
c = (DatagramChannel)key.Channel();
b = (UDPBuffer)key.Attachment();
b.buffer.Clear();
b.socketAddress = c.Receive(b.buffer);
b.buffer.Flip();
b.buffer.Get(buff, 0, b.buffer.Limit());
MessagingCenter.Send <PacketEvent>(new PacketEvent(new Java.Net.DatagramPacket(buff, b.buffer.Limit(), b.socketAddress)), "PacketEvent");
}
catch (Exception e)
{
throw new IOException(e.StackTrace);
}
}
private void HandleWrite(SelectionKey key)
{
if (!(outboundQueue.Count == 0))
{
if (DEBUG)
{
Log.Debug("MIDIPort2", "handleWrite " + outboundQueue.Count);
}
try {
DatagramChannel c = (DatagramChannel)key.Channel();
DatagramPacket d = outboundQueue.Dequeue();
if (d != null)
{
c.Send(ByteBuffer.Wrap(d.GetData()), d.SocketAddress);
}
} catch (IOException e) {
throw new IOException(e.StackTrace);
}
}
}
private void processInput(SelectionKey key, List <SelectionKey> keyIterator)
{
System.Console.WriteLine("TCP In");
try
{
if (keyIterator[0] != null)
{
keyIterator.RemoveAt(0);
}
ByteBuffer receiveBuffer = ByteBufferPool.acquire();
// Leave space for the header
receiveBuffer.Position(HEADER_SIZE);
TCB tcb = (TCB)key.Attachment();
lock (tcb)
{
Packet referencePacket = tcb.referencePacket;
SocketChannel inputChannel = (SocketChannel)key.Channel();
int readBytes;
try
{
readBytes = inputChannel.Read(receiveBuffer);
}
catch (IOException e)
{
Log.Error(TAG, "Network read error: " + tcb.ipAndPort, e);
referencePacket.updateTCPBuffer(receiveBuffer, (byte)Packet.TCPHeader.RST, 0, tcb.myAcknowledgementNum, 0);
outputQueue.Offer(receiveBuffer);
TCB.CloseTCB(tcb);
return;
}
if (readBytes == -1)
{
// End of stream, stop waiting until we push more data
//key.InterestOps(0);
key.InterestOps();
tcb.waitingForNetworkData = false;
if (tcb.status != TCBStatus.CLOSE_WAIT)
{
ByteBufferPool.Release(receiveBuffer);
return;
}
tcb.status = TCBStatus.LAST_ACK;
referencePacket.updateTCPBuffer(receiveBuffer, (byte)Packet.TCPHeader.FIN, tcb.mySequenceNum, tcb.myAcknowledgementNum, 0);
tcb.mySequenceNum++; // FIN counts as a byte
}
else
{
// XXX: We should ideally be splitting segments by MTU/MSS, but this seems to work without
referencePacket.updateTCPBuffer(receiveBuffer, (byte)(Packet.TCPHeader.PSH | Packet.TCPHeader.ACK),
tcb.mySequenceNum, tcb.myAcknowledgementNum, readBytes);
tcb.mySequenceNum += readBytes; // Next sequence number
receiveBuffer.Position(HEADER_SIZE + readBytes);
}
}
outputQueue.Offer(receiveBuffer);
}
catch (Java.Lang.Exception ex)
{
System.Console.WriteLine(ex.Message);
}
}
