/// <summary>
/// Receives a response TPDU
/// </summary>
/// <returns></returns>
public byte[] ReceiveResponsePacket()
{
int receiveCounter = 0;
while (receiveCounter < MAX_BLOCKREPEATS)
{
byte[] tpduFrameData = ReceiveTpduFrame();
if (tpduFrameData == null)
{
throw new ConnectionTimeOutException();
}
RS232Tpdu receivedTpdu = RS232Tpdu.CreateFromTPDUBytes(tpduFrameData);
if (receivedTpdu.CheckCRC(tpduFrameData[tpduFrameData.Length - 2], tpduFrameData[tpduFrameData.Length - 1]))
{
SendStatus(ACK);
return(receivedTpdu.GetAPDUData());
}
receiveCounter++;
SendStatus(NAK);
}
return(null);
}
public static RS232Tpdu CreateFromTPDUBytes(byte[] data)
{
if (data == null)
return null;
RS232Tpdu tpdu = new RS232Tpdu();
List<byte> apduBytes = new List<byte>(data);
apduBytes.RemoveRange(0, 2);
apduBytes.RemoveRange(apduBytes.Count - 4, 4);
tpdu.ApduData = UnescapeAPDU(apduBytes.ToArray());
return tpdu;
}
public static RS232Tpdu CreateFromTPDUBytes(byte[] data)
{
if (data == null)
{
return(null);
}
RS232Tpdu tpdu = new RS232Tpdu();
List <byte> apduBytes = new List <byte>(data);
apduBytes.RemoveRange(0, 2);
apduBytes.RemoveRange(apduBytes.Count - 4, 4);
tpdu.ApduData = UnescapeAPDU(apduBytes.ToArray());
return(tpdu);
}
/// <summary>
/// Receives a response TPDU
/// </summary>
/// <returns></returns>
public byte[] ReceiveResponsePacket()
{
int receiveCounter = 0;
while (receiveCounter < MAX_BLOCKREPEATS)
{
byte[] tpduFrameData = ReceiveTpduFrame();
RS232Tpdu receivedTpdu = RS232Tpdu.CreateFromTPDUBytes(tpduFrameData);
if (tpduFrameData != null && receivedTpdu.CheckCRC(tpduFrameData[tpduFrameData.Length - 2], tpduFrameData[tpduFrameData.Length - 1]))
{
SendStatus(ACK);
return(receivedTpdu.GetAPDUData());
}
else
{
receiveCounter++;
SendStatus(NAK);
}
}
return(null);
}
