private static async Task CrossoverBindingAsync(CancellationToken cancelToken, BindingInfo sourceBinding, BindingInfo destBinding)
{
while (!cancelToken.IsCancellationRequested)
{
switch (sourceBinding.BindingType)
{
case BindingType.NamedPipe:
{
using (
var pipeServer = new NamedPipeServerStream(
sourceBinding.Address,
PipeDirection.InOut,
1,
PipeTransmissionMode.Byte,
PipeOptions.Asynchronous,
4096,
4096))
{
while (!cancelToken.IsCancellationRequested)
{
pipeServer.WaitForConnection();
Console.WriteLine("Connection from " + sourceBinding);
if (pipeServer.IsConnected)
{
var serverStream = new PluggableStream(pipeServer);
try
{
await ClientConnectAsync(cancelToken, serverStream, destBinding);
}
catch (OperationCanceledException e)
{
Console.WriteLine(e.Message);
}
}
pipeServer.Disconnect();
}
break;
}
}
case BindingType.Serial:
{
SerialPort serialPortServer;
try
{
serialPortServer = new SerialPort(
String.Format("COM{0}", sourceBinding.Port), 115200, Parity.None, 8, StopBits.One);
serialPortServer.Open();
serialPortServer.DtrEnable = true;
}
catch (UnauthorizedAccessException)
{
// could not connect COM port, disconnect the client
serialPortServer = null;
throw new OperationCanceledException();
}
if (serialPortServer != null)
{
Console.WriteLine("Connection from " + sourceBinding);
var serverStream = new PluggableStream(serialPortServer.BaseStream);
await ClientConnectAsync(cancelToken, serverStream, destBinding);
serialPortServer.Close();
}
break;
}
case BindingType.Socket:
{
var ep = new IPEndPoint(IPAddress.Parse(sourceBinding.Address), sourceBinding.Port ?? 80);
using (var socketServer = new Socket(ep.AddressFamily, SocketType.Stream, ProtocolType.Tcp))
{
socketServer.Bind(ep);
socketServer.Listen(1);
while (!cancelToken.IsCancellationRequested)
{
using (var dataSocket = socketServer.Accept())
{
dataSocket.NoDelay = true;
Console.WriteLine("Connection from " + sourceBinding);
var serverStream = new PluggableSocket(dataSocket);
try
{
await ClientConnectAsync(cancelToken, serverStream, destBinding);
}
catch (OperationCanceledException e)
{
Console.WriteLine(e.Message);
}
}
}
}
break;
}
}
}
}
private static async Task ClientConnectAsync(CancellationToken cancelToken, IPluggableStreamAsync serverStream, BindingInfo clientBinding)
{
IPluggableStreamAsync clientStream;
if (clientBinding.BindingType == BindingType.Serial)
{
using (var serialPortClient = new SerialPort(string.Format("COM{0}", clientBinding.Port), 115200, Parity.None, 8, StopBits.One))
{
try
{
serialPortClient.DtrEnable = true;
serialPortClient.Open();
}
catch (UnauthorizedAccessException)
{
throw new InvalidOperationException("Could not connect COM port");
}
clientStream = new PluggableStream(serialPortClient.BaseStream);
Console.WriteLine("Connection made");
await StreamCrossover.HandleClientAsync(cancelToken, serverStream, clientStream);
}
}
else if (clientBinding.BindingType == BindingType.Socket)
{
var ep = new IPEndPoint(IPAddress.Parse(clientBinding.Address), clientBinding.Port ?? 80);
while (!cancelToken.IsCancellationRequested)
{
using (var socketClient = new Socket(ep.AddressFamily, SocketType.Stream, ProtocolType.Tcp))
{
try
{
socketClient.Connect(ep);
}
catch (SocketException e)
{
Console.WriteLine("Exception connecting to outgoing host: " + e + ": " + e.Message);
await Task.Delay(10000);
continue;
}
socketClient.NoDelay = true;
clientStream = new PluggableSocket(socketClient);
Console.WriteLine("Connection made");
try
{
await StreamCrossover.HandleClientAsync(cancelToken, serverStream, clientStream);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
socketClient.Disconnect(false);
if (!serverStream.IsConnected())
{
return;
}
}
}
}
else if (clientBinding.BindingType == BindingType.NamedPipe)
{
using (var pipeClient = new NamedPipeClientStream(".", clientBinding.Address, PipeDirection.InOut, PipeOptions.Asynchronous))
{
pipeClient.Connect();
if (!pipeClient.IsConnected)
{
return;
}
clientStream = new PluggableStream(pipeClient);
Console.WriteLine("Connection made");
try
{
await StreamCrossover.HandleClientAsync(cancelToken, serverStream, clientStream);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
}
}
