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>();
}
public void TestGetDataSize()
{
Assert.AreEqual(8, HammingHelper.GetDataSize(13));
Assert.AreEqual(16, HammingHelper.GetDataSize(26));
}
