public Station(
Constants.StationId stationType,
ITransmitter transmitter,
int bufferSize,
int timeoutInMs,
bool detectionOnly,
FileStream inputFileStream,
FileStream outputFileStream,
Constants.ShowFrameDelegate sendFrame)
{
this.StationId = stationType;
this.transmitter = transmitter;
this.BufferSize = bufferSize;
InputBuffer = new Dictionary <int, Frame>();
OutputBuffer = new Dictionary <int, Frame>();
this.TimeoutInMs = timeoutInMs;
this.CorrectionMode = detectionOnly ? HammingHelper.Mode.DETECT : HammingHelper.Mode.CORRECT;
this.inputFileStream = inputFileStream;
this.outputFileStream = outputFileStream;
this.sendFrameDelegate = sendFrame;
StopExecution = false;
ExecutionStopped = new ManualResetEvent(false);
// Initialize constants
int frameSizeBeforeHamming = HammingHelper.GetDataSize(Constants.FrameSize * 8) / 8;
int realBitCount = HammingHelper.GetTotalSize(frameSizeBeforeHamming * 8);
EncodedFramePadding = Constants.FrameSize * 8 - realBitCount;
int frameHeaderSize = Frame.HeaderSize();
DataSizeInFrame = frameSizeBeforeHamming - frameHeaderSize;
MaxSequence = (UInt16)(bufferSize * 2 - 1);
// Initialize fields
FirstFrameSent = 0;
NextFrameToSendSequenceNumber = 0;
NextFrameToReceive = 0;
// Since frames cannot use MaxSequence as a sequence number, we use it for LastFrameSequenceNumberForNak.
// This is meant to ensure that no Frame matches this field if there was no Nak sent.
LastFrameSequenceNumberForNak = MaxSequence;
// Initialise ack timer logic
AckTimer = new System.Timers.Timer(AckTimeout);
// When the timer ends, we need to inform the program that we need to send an Ack now. Also stop the timer.
AckTimer.Elapsed += (sender, e) => { sendAck = true; AckTimer.Stop(); Console.WriteLine("ack timer elapsed"); };
sendAck = false;
HighPriorityFrames = new Queue <Frame>();
TimeoutTimers = new ConcurrentDictionary <UInt16, System.Timers.Timer>();
}
private void ShowFrame(Frame frameToShow, Constants.FrameEvent frameEvent, Constants.StationId stationId)
{
bool isSent = frameEvent == Constants.FrameEvent.FrameSent;
//based on msdn doc: https://msdn.microsoft.com/en-us/library/ms171728(v=vs.110).aspx
//Thread safe call to richtextbox
RichTextBox textBox = isSent ? txtDataSend : txtReception;
if (textBox.InvokeRequired)
{
UpdateDataDelegate d = ShowFrame;
Invoke(d, frameToShow, frameEvent, stationId);
}
else
{
OnAppend(((Int16)frameToShow.Id).ToString("000") + " | ", textBox, DefaultForeColor);
switch (frameToShow.Type)
{
case Constants.FrameType.Ack:
OnAppend("Ack ", textBox, Color.Green);
break;
case Constants.FrameType.Nak:
OnAppend("Nak ", textBox, Color.DarkRed);
break;
case Constants.FrameType.Data:
OnAppend("Data", textBox, DefaultForeColor);
break;
}
OnAppend(" | " + ((Int16)frameToShow.Ack).ToString("00"), textBox, DefaultForeColor);
OnAppend(" | " + frameToShow.DataSize.ToString("000"), textBox, DefaultForeColor);
OnAppend(" ", textBox, DefaultForeColor);
string errorMessage = "|";
Color errorColor = DefaultForeColor;
switch (frameEvent)
{
case Constants.FrameEvent.FrameReceivedCorrupted:
errorMessage += "Détecté";
errorColor = Color.DarkOrange;
break;
case Constants.FrameEvent.FrameReceivedNotAwaited:
break;
case Constants.FrameEvent.FrameReceivedDuplicate:
break;
case Constants.FrameEvent.FrameReceivedOk:
break;
case Constants.FrameEvent.FrameReceivedCorrected:
errorMessage += "Corrigé";
errorColor = Color.DarkGreen;
break;
case Constants.FrameEvent.FrameSent:
break;
default:
throw new ArgumentOutOfRangeException(nameof(frameEvent), frameEvent, null);
}
OnAppend(errorMessage, textBox, errorColor);
OnAppend(Environment.NewLine, textBox, DefaultForeColor);
//Updating the progress bar.
if (stationId == Constants.StationId.Station2 && (frameEvent == Constants.FrameEvent.FrameReceivedOk ||
frameEvent == Constants.FrameEvent.FrameReceivedCorrected))
{
int newTotal = transfertBar.Value + (int)frameToShow.DataSize;
transfertBar.Value = Math.Min(newTotal, transfertBar.Maximum);
if (transfertBar.Value == transfertBar.Maximum)
{
MessageBox.Show(this, "Tranfert complété!");
}
}
}
}
