public void Run()
{
try
{
Log.Info(TAG, "Started");
while (!Thread.Interrupted())
{
int readyChannels = selector.Select();
if (readyChannels == 0)
{
Thread.Sleep(10);
continue;
}
System.Console.WriteLine("UDP In");
var keys = selector.SelectedKeys().ToList();
foreach (var key in keys)
{
if (!Thread.Interrupted())
{
if (key.IsValid && key.IsReadable)
{
selector.SelectedKeys().Remove(key);
ByteBuffer receiveBuffer = ByteBufferPool.acquire();
// Leave space for the header
receiveBuffer.Position(HEADER_SIZE);
DatagramChannel inputChannel = (DatagramChannel)key.Channel();
// XXX: We should handle any IOExceptions here immediately,
// but that probably won't happen with UDP
int readBytes = inputChannel.Read(receiveBuffer);
Packet referencePacket = (Packet)key.Attachment();
referencePacket.updateUDPBuffer(receiveBuffer, readBytes);
receiveBuffer.Position(HEADER_SIZE + readBytes);
outputQueue.Offer(receiveBuffer);
}
}
}
}
}
catch (InterruptedException e)
{
Log.Info(TAG, "Stopping");
}
catch (IOException e)
{
Log.Warn(TAG, e.ToString(), e);
}
}
private void closeChannel(DatagramChannel channel)
{
try
{
channel.Close();
}
catch (IOException e)
{
// Ignore
}
}
public static Channel <Try <Datagram> > ToChannel(this Socket socket, Action <DatagramChannelOptions> configuration = null)
{
var options = new DatagramChannelOptions();
configuration?.Invoke(options);
var channel = new DatagramChannel(socket, options);
channel.Start();
return(channel);
}
private void handleRead(SelectionKey key)
{
// Log.d("MIDIPort2","handleRead");
DatagramChannel c = (DatagramChannel)key.channel();
UDPBuffer b = (UDPBuffer)key.attachment();
try {
b.buffer.clear();
b.socketAddress = c.receive(b.buffer);
EventBus.getDefault().post(new PacketEvent(new DatagramPacket(b.buffer.array(), b.buffer.capacity(), b.socketAddress)));
} catch (IOException e) {
e.printStackTrace();
}
}
private void handleWrite(SelectionKey key)
{
if (!outboundQueue.isEmpty())
{
// Log.d("MIDIPort2","handleWrite "+ outboundQueue.size());
try {
DatagramChannel c = (DatagramChannel)key.channel();
DatagramPacket d = outboundQueue.poll();
c.send(ByteBuffer.wrap(d.getData()), d.getSocketAddress());
} catch (IOException e) {
e.printStackTrace();
}
}
}
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);
}
}
}
public DatagramBlock(Socket socket, DatagramBlockOptions options)
{
if (socket == null)
{
throw new ArgumentNullException(nameof(socket));
}
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
taskFactory = new TaskFactory(options.TaskScheduler ?? TaskScheduler.Default);
channel = new DatagramChannel(socket, new DatagramChannelOptions
{
SingleReader = true,
SingleWriter = true
});
inputBuffer = new BufferBlock <Try <Datagram> >(new DataflowBlockOptions
{
BoundedCapacity = options.SendingBufferCapacity ?? 1,
TaskScheduler = options.TaskScheduler ?? TaskScheduler.Default,
CancellationToken = options.CancellationToken ?? CancellationToken.None,
EnsureOrdered = false
});
outputBuffer = new BufferBlock <Try <Datagram> >(new DataflowBlockOptions
{
BoundedCapacity = options.ReceivingBufferCapacity ?? 1,
TaskScheduler = options.TaskScheduler ?? TaskScheduler.Default,
CancellationToken = options.CancellationToken ?? CancellationToken.None,
EnsureOrdered = false
});
inputCompletionSource = new TaskCompletionSource();
outputCompletionSource = new TaskCompletionSource();
}
private MIDIPort(int port)
{
this.port = port;
try {
selector = Selector.Open();
channel = DatagramChannel.Open();
outboundQueue = new Queue <DatagramPacket>();
// inboundQueue = new ConcurrentLinkedQueue<DatagramPacket>();
InetSocketAddress address = new InetSocketAddress(this.port);
channel.Socket().ReuseAddress = true;
channel.ConfigureBlocking(false);
channel.Socket().Bind(address);
channel.Register(selector, Operations.Read | Operations.Write, new UDPBuffer());
Thread newThread = new Thread(new ThreadStart(Run));
newThread.Start();
}
catch (IOException e) {
e.StackTrace.ToString();
}
}
private MIDIPort(int port)
{
this.port = port;
try {
selector = Selector.open();
channel = DatagramChannel.open();
outboundQueue = new ConcurrentLinkedQueue <>();
// inboundQueue = new ConcurrentLinkedQueue<DatagramPacket>();
InetSocketAddress address = new InetSocketAddress(this.port);
channel.socket().setReuseAddress(true);
channel.configureBlocking(false);
channel.socket().bind(address);
// channel.register(selector, SelectionKey.OP_READ | SelectionKey.OP_WRITE);
channel.register(selector, SelectionKey.OP_READ | SelectionKey.OP_WRITE, new UDPBuffer());
Thread newThread = new Thread(new ThreadStart(Run));
newThread.Start();
} catch (IOException e) {
e.printStackTrace();
}
}
public void Run()
{
Log.Info(TAG, "Started");
try
{
Thread currentThread = Thread.CurrentThread();
while (true)
{
Packet currentPacket;
// TODO: Block when not connected
do
{
currentPacket = (Packet)inputQueue.Poll();
if (currentPacket != null)
{
break;
}
Thread.Sleep(10);
} while (!currentThread.IsInterrupted);
if (currentThread.IsInterrupted)
{
break;
}
InetAddress destinationAddress = currentPacket.ip4Header.destinationAddress;
int destinationPort = currentPacket.udpHeader.destinationPort;
int sourcePort = currentPacket.udpHeader.sourcePort;
Java.Lang.String ipAndPort = new Java.Lang.String(destinationAddress.HostAddress + ":" + destinationPort + ":" + sourcePort);
System.Console.WriteLine("UDP Out: " + ipAndPort);
DatagramChannel outputChannel = (DatagramChannel)channelCache.Get(ipAndPort);
if (outputChannel == null)
{
outputChannel = DatagramChannel.Open();
vpnService.Protect(outputChannel.Socket());
try
{
outputChannel.Connect(new InetSocketAddress(destinationAddress, destinationPort));
}
catch (IOException e)
{
Log.Error(TAG, "Connection error: " + ipAndPort, e);
closeChannel(outputChannel);
ByteBufferPool.Release(currentPacket.backingBuffer);
continue;
}
outputChannel.ConfigureBlocking(false);
currentPacket.SwapSourceAndDestination();
selector.Wakeup();
outputChannel.Register(selector, SelectionKey.OpRead, currentPacket);
channelCache.Put(ipAndPort, outputChannel);
}
try
{
ByteBuffer payloadBuffer = currentPacket.backingBuffer;
while (payloadBuffer.HasRemaining)
{
outputChannel.Write(payloadBuffer);
}
}
catch (IOException e)
{
Log.Error(TAG, "Network write error: " + ipAndPort, e);
channelCache.Remove(ipAndPort);
closeChannel(outputChannel);
}
ByteBufferPool.Release(currentPacket.backingBuffer);
}
}
catch (InterruptedException e)
{
Log.Info(TAG, "Stopping");
}
catch (IOException e)
{
Log.Info(TAG, e.ToString(), e);
}
finally
{
closeAll();
}
}
