/// <summary>
/// Checks if the frame given has a CRC error
/// </summary>
/// <param name="frame">Frame to be checked</param>
/// <param name="crc">CRC to be compare to</param>
/// <returns>True if there is a CRC error, false otherwise</returns>
protected static bool HasCrcError(TcmpFrame frame, byte[] crc)
{
List <byte> data = new List <byte>(frame.ToArray());
byte[] temp = CalculateCrc(data.GetRange(1, frame.FrameLength - 4));
if (temp[0] != frame.Crc[0] || temp[1] != frame.Crc[1])
{
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Checks if the frame given has a LCS errors, CRC errors, or other errors
/// </summary>
/// <param name="frame"></param>
/// <returns>True is frame has no errors, false otherwise</returns>
public static bool IsValidFrame(TcmpFrame frame)
{
if (frame == null)
{
return(false);
}
byte[] contents = frame.ToArray();
if (contents.Length < 10)
{
return(false);
}
if (contents[0] != 0x7E)
{
return(false);
}
if (HasLcsError(frame.Len1, frame.Len0, frame.Lcs))
{
return(false);
}
if (frame.Length + 5 != contents.Length)
{
return(false);
}
if (HasCrcError(frame, frame.Crc))
{
return(false);
}
return(true);
}