public void RcvData(string InputString)
{
// Compare the frame number and checksum to see whether the frame is good or bad.
bool isFrameGood;
// Compare frame numbers.
if (InputString.TrimStart('\x02').StartsWith(ExpectedFrame.ToString()))
{
isFrameGood = true;
}
else
{
AppendToLog("Frame number is incorrect!");
isFrameGood = false;
}
// Check checksum.
if (isFrameGood)
{
isFrameGood = CheckChecksum(InputString);
}
// If it's a header message, check the password.
if (isFrameGood)
{
isFrameGood = CheckPassword(InputString);
}
// If the frame is still good after all those checks,
// take appropriate action.
if (isFrameGood)
{
// Send ACK
comm.Send(Constants.ACK);
// Reset rcvTimer to 30 seconds.
comm.rcvTimer.Reset(30);
// Increment frame number.
ExpectedFrame = ++ExpectedFrame % 8;
// Actually handle the frame.
comm.ParseMessageLine(InputString);
}
else
{
// Send NAK
comm.Send(Constants.NAK);
// Reset rcvTimer to 30 seconds.
comm.rcvTimer.Reset(30);
}
}
public void RcvACK()
{
// Send next frame.
comm.CurrentMessage = comm.OutboundMessageQueue.Dequeue();
comm.CurrentMessage.PrepareToSend();
comm.Send(comm.CurrentMessage.FrameList[comm.CurrentFrameCounter]);
comm.CurrentFrameCounter++;
// Reset the NAK count to 0.
comm.numNAK = 0;
// Reset the transaction timer to 15 seconds.
comm.transTimer.Reset(15);
}
public void RcvACK()
{
#if DEBUG
AppendToLog("CurrentMessage.FrameList.Count: " + comm.CurrentMessage.FrameList.Count);
AppendToLog("CurrentFrameCounter: " + comm.CurrentFrameCounter);
#endif
// If all frames have been sent, end the transmission.
if (comm.CurrentMessage.FrameList.Count == comm.CurrentFrameCounter)
{
comm.Send(Constants.EOT);
comm.CurrentMessage = new Message(comm);
}
else
{
// Otherwise, send next frame.
comm.Send(comm.CurrentMessage.FrameList[comm.CurrentFrameCounter]);
comm.CurrentFrameCounter++;
// Reset the NAK count to 0.
comm.numNAK = 0;
// Reset the transaction timer to 15 seconds.
comm.transTimer.Reset(15);
}
}