protected int write(ByteBuffer buffer)
{
int byteSendSum = 0;
beforeSend(buffer);
while (buffer.HasRemaining)
{
int byteSent = mInnerChannel.Write(buffer);
byteSendSum += byteSent;
if (byteSent == 0)
{
break;
}
}
return(byteSendSum);
}
private void processACK(TCB tcb, TCPHeader tcpHeader, ByteBuffer payloadBuffer, ByteBuffer responseBuffer)
{
try
{
int payloadSize = payloadBuffer.Limit() - payloadBuffer.Position();
lock (tcb)
{
SocketChannel outputChannel = tcb.channel;
if (tcb.status == TCB.TCBStatus.SYN_RECEIVED)
{
tcb.status = TCB.TCBStatus.ESTABLISHED;
selector.Wakeup();
tcb.selectionKey = outputChannel.Register(selector, SelectionKey.OpRead, tcb);
tcb.waitingForNetworkData = true;
}
else if (tcb.status == TCB.TCBStatus.LAST_ACK)
{
CloseCleanly(tcb, responseBuffer);
return;
}
if (payloadSize == 0)
{
return; // Empty ACK, ignore
}
if (!tcb.waitingForNetworkData)
{
selector.Wakeup();
// tcb.selectionKey.InterestOps(SelectionKey.OpRead);
tcb.selectionKey.InterestOps();
tcb.waitingForNetworkData = true;
}
// Forward to remote server
try
{
while (payloadBuffer.HasRemaining)
{
outputChannel.Write(payloadBuffer);
}
}
catch (IOException e)
{
Log.Error(TAG, "Network write error: " + tcb.ipAndPort, e);
SendRST(tcb, payloadSize, responseBuffer);
return;
}
// TODO: We don't expect out-of-order packets, but verify
tcb.myAcknowledgementNum = tcpHeader.sequenceNumber + payloadSize;
tcb.theirAcknowledgementNum = tcpHeader.acknowledgementNumber;
Packet referencePacket = tcb.referencePacket;
referencePacket.updateTCPBuffer(responseBuffer, (byte)TCPHeader.ACK, tcb.mySequenceNum, tcb.myAcknowledgementNum, 0);
}
outputQueue.Offer(responseBuffer);
}
catch (Exception ex)
{
System.Console.WriteLine(ex.Message);
}
}
