* @return {@code true} if the argument is a 6to4 address
   */
  public static boolean is6to4Address(Inet6Address ip) {
    byte[] bytes = ip.getAddress();
    return (bytes[0] == (byte) 0x20) && (bytes[1] == (byte) 0x02);
  }

  /**
   * Returns the IPv4 address embedded in a 6to4 address.
   *
   * @param ip {@link Inet6Address} to be examined for embedded IPv4 in 6to4 address

        assertNotNull(netShareEnum);
        assertEquals("\\PIPE\\LANMAN", getFieldValue(netShareEnum, "name"));
        assertEquals(8, getFieldValue(netShareEnum, "maxParameterCount"));
        assertEquals((byte) 0x00, getFieldValue(netShareEnum, "maxSetupCount"));
        assertEquals(0, getFieldValue(netShareEnum, "setupCount"));
        assertEquals(5000, getFieldValue(netShareEnum, "timeout"));

    }

    @Test
    void testReadTagNumber_MultiByte() throws IOException {
        // Multi-byte tag (e.g., 80)
        InputStream s = new ByteArrayInputStream(new byte[] { (byte) 0x81, 0x00 });
        int tagNo = ASN1Util.readTagNumber(s, 0x1F);
        assertEquals(128, tagNo);
    }

    @Test
    void testReadTagNumber_CorruptedHighTag() {
        // High tag < 31

     */
    public static final int SMB2_GLOBAL_CAP_PERSISTENT_HANDLES = 0x10;

    /**
     * Server supports directory leasing
     */
    public static final int SMB2_GLOBAL_CAP_DIRECTORY_LEASING = 0x20;

    /**
     * Server supports SMB3 encryption
     */
    public static final int SMB2_GLOBAL_CAP_ENCRYPTION = 0x40;

    /**
     * File information class
     */

		return
	}
	err = en.WriteInt64(z.LimitInBytesPerSecond)
	if err != nil {
		err = msgp.WrapError(err, "LimitInBytesPerSecond")
		return
	}
	// write "CurrentBandwidthInBytesPerSecond"
	err = en.Append(0xd9, 0x20, 0x43, 0x75, 0x72, 0x72, 0x65, 0x6e, 0x74, 0x42, 0x61, 0x6e, 0x64, 0x77, 0x69, 0x64, 0x74, 0x68, 0x49, 0x6e, 0x42, 0x79, 0x74, 0x65, 0x73, 0x50, 0x65, 0x72, 0x53, 0x65, 0x63, 0x6f, 0x6e, 0x64)
	if err != nil {
		return
	}

        }

        off -= 4;

        b[off + 0] = (byte) SessionServicePacket.SESSION_MESSAGE;
        b[off + 1] = (byte) 0x00;
        b[off + 2] = (byte) (len >> 8 & 0xFF);
        b[off + 3] = (byte) (len & 0xFF);

        out.write(b, off, 4 + len);
    }

     */
    int DCERPC_CONC_MPX = 0x10; /* supports concurrent multiplexing */
    /**
     * Did not execute flag - indicates request was not executed
     */
    int DCERPC_DID_NOT_EXECUTE = 0x20;
    /**
     * Maybe flag - indicates 'maybe' call semantics requested
     */
    int DCERPC_MAYBE = 0x40; /* `maybe' call semantics requested */
    /**

    class HexConversionTests {

        @Test
        @DisplayName("Various byte values are converted to uppercase hex")
        void testHexConversion() {
            byte[] challenge = new byte[] { (byte) 0x00, (byte) 0x0F, (byte) 0x10, (byte) 0x7F, (byte) 0x80, (byte) 0xFF };
            UniAddress dc = mock(UniAddress.class);
            when(dc.toString()).thenReturn("DC");

        buffer[bufferIndex++] = 1;
        buffer[bufferIndex++] = 0;
        // maxBufferSize
        buffer[bufferIndex++] = (byte) 0x00;
        buffer[bufferIndex++] = (byte) 0x40;
        buffer[bufferIndex++] = 0;
        buffer[bufferIndex++] = 0;
        // maxRawSize
        buffer[bufferIndex++] = (byte) 0x00;
        buffer[bufferIndex++] = (byte) 0x10;
        buffer[bufferIndex++] = 0;
        buffer[bufferIndex++] = 0;

        ByteBuffer buffer = ByteBuffer.allocate(size);
        buffer.order(ByteOrder.LITTLE_ENDIAN);

        // Security descriptor header
        buffer.put((byte) 0x01); // Revision
        buffer.put((byte) 0x00); // Padding
        buffer.putShort((short) 0x8004); // Control flags (SE_DACL_PRESENT | SE_SELF_RELATIVE)
        buffer.putInt(20); // Owner offset
        buffer.putInt(40); // Group offset