/// <summary>
///
/// </summary>
public void CloseClient()
{
if (CommClient != null)
{
CommClient.Close();
}
}
/// <summary>
///
/// </summary>
private void SetUpReceivingTask()
{
TcpReceivingTask = new Task(() =>
{
var bytes = new byte[4];
try
{
while (true)
{
var count = CommClient.Client.Receive(bytes, 4, SocketFlags.None);
if (count == 0)
{
throw new Exception("Remote Endpoint could be closed");
}
buffer = buffer.Concat(bytes.Take(count)).ToArray();
HandleBuffer();
}
}
catch (Exception ex)
{
throw new CommunicationTaskException(ex);
}
finally
{
CommClient.Close();
CommClient = null;
}
});
}
/// <summary>
///
/// </summary>
public async Task StartServer(CancellationToken token)
{
bool accepted = false;
bool listenerReturn = false;
try
{
var commEndPoint = new IPEndPoint(IPAddress.Any, 10080);
Listener = new TcpListener(commEndPoint);
BroadcastSender = new UdpClient();
Listener.Start();
var taskAccept = Task.Run(() =>
{
try
{
CommClient = Listener.AcceptTcpClient();
accepted = true;
}
finally
{
listenerReturn = true;
}
});
var taskBroadcast = Task.Run(async() =>
{
while (true)
{
if (listenerReturn)
{
break;
}
try
{
var remoteEndPoint = new IPEndPoint(IPAddress.Broadcast, 10080);
BroadcastSender.Send(new byte[] { 0xcc, 0xdd }, 2, remoteEndPoint);
}
catch { }
await Task.Delay(2000);
}
});
var cancellationCheck = Task.Run(async() =>
{
try
{
while (true)
{
await Task.Delay(500);
if (token.IsCancellationRequested)
{
if (!accepted)
{
Listener.Stop();
}
break;
}
if (listenerReturn)
{
break;
}
}
}
catch { }
});
await taskAccept;
}
catch
{
throw;
}
finally
{
Listener.Stop();
BroadcastSender.Close();
if ((!accepted) && (CommClient != null))
{
CommClient.Close();
CommClient = null;
}
if (accepted)
{
SetUpReceivingTask();
CommunicationEstablished?.Invoke(true);
}
}
}
/// <summary>
///
/// </summary>
public void CloseClient()
{
CommClient?.Close();
}