impl.setOption(SocketOptions.IP_TOS, new Integer(tc));
getImpl().setOption(SocketOptions.IP_TOS, new Integer(tc));
	public void setTrafficClass(int tc) throws SocketException {		if (impl == null)			throw new SocketException("Cannot initialize Socket implementation");		if (tc < 0 || tc > 255)			throw new IllegalArgumentException();		impl.setOption(SocketOptions.IP_TOS, new Integer(tc));	}