private bool isValidLength(int length, int id)
{
int idstrip = id / 256;
if (idstrip == 0xEB || idstrip == 0xDF)
{
if (length > 0 && length <= 32) return true;
}
else
{
if (length > 0 && length < 32) return true;
}
// if (length == 32 || length == 48 || length == 64) Console.WriteLine("seen id " + id.ToString("X4") + " with len " + length.ToString());
return false;
}