private async void SocketListener_ConnectionReceived(StreamSocketListener sender, StreamSocketListenerConnectionReceivedEventArgs args)
{
if (_sensorConnection != null)
{
// send sensor busy?
args.Socket.Dispose();
}
_sensorConnection = args.Socket;
_dataReader = new DataReader(_sensorConnection.InputStream);
_dataWriter = new DataWriter(_sensorConnection.OutputStream);
_dataWriter.ByteOrder = ByteOrder.LittleEndian;
_dataReader.ByteOrder = ByteOrder.LittleEndian;
var operation = await _dataReader.LoadAsync(8);
var hello = HelloPacket.Read(_dataReader);
// reply with version - resend hello packet
hello.Write(_dataWriter);
await _dataWriter.StoreAsync();
await _dataWriter.FlushAsync();
// todo: start receive loop
}
private async Task <bool> OpenNetworkAsync()
{
if (_sensorConnection != null)
{
return(true);
}
// TODO winsock/Socket with IOCP vs. UWP sockets
try
{
_sensorConnection = new StreamSocket();
await _sensorConnection.ConnectAsync(_sensorAddress);
_dataReader = new DataReader(_sensorConnection.InputStream);
_dataWriter = new DataWriter(_sensorConnection.OutputStream);
_dataWriter.ByteOrder = ByteOrder.LittleEndian;
_dataReader.ByteOrder = ByteOrder.LittleEndian;
// write header/ protocol version/ connection config
var helloPacket = new HelloPacket(1);
helloPacket.Write(_dataWriter);
await _dataWriter.StoreAsync();
await _dataWriter.FlushAsync();
// read the response from the server
var asyncOperation = _dataReader.LoadAsync(8);
// TODO: timeout handling
if (!asyncOperation.AsTask().Wait(50000))
{
asyncOperation.Close();
asyncOperation.Cancel();
}
helloPacket = HelloPacket.Read(_dataReader);
// TODO: compare protocol versions
// Start receive loop
}
catch (Exception)
{
_sensorConnection?.Dispose();
_sensorConnection = null;
_dataReader?.Dispose();
_dataReader = null;
_dataWriter?.Dispose();
_dataWriter = null;
return(false);
}
return(true);
}
