static void feedPacket(AsyncSSLEngine engine, ByteBuffer b) throws Exception {
		int bytesLeft = 0;
		if(b.remaining() < 15)
			bytesLeft = 2;
		else
		    bytesLeft = 12;
		int lim = b.limit();
		b.limit(bytesLeft);
		engine.feedEncryptedPacket(b, null);
		b.limit(lim);
		engine.feedEncryptedPacket(b, null);
	}