docs: private List makeDOAs(List l)
  	{
  		for (int i = 0; i < l.size(); ++i) {
  			final byte[] pdu = (byte[]) l.get(i);
  			if (pdu.length == 4)
  				l.set(i, new byte[] { pdu[2], pdu[3] });
  			else if (pdu.length == 8)
  				l.set(i, new byte[] { pdu[2], pdu[3], pdu[4], pdu[5], pdu[6], pdu[7] });
  		}
  		return l;
  	}