assertArrayEquals(expectedDescrBytes, actualDescrBytes);

        // Verify level (0x0001)
        int descrEnd = 2 + expectedDescrBytes.length;
        assertEquals(0x01, dst[descrEnd]);
        assertEquals(0x00, dst[descrEnd + 1]);

        // Verify maxDataCount (16384)
        assertEquals(16384, SMBUtil.readInt2(dst, descrEnd + 2));

        // Verify serverTypes

                dst[dstIndex + 2 * i + 2] = (byte) ((tmp[i] & 0x0F) + 0x41);
            }
            for (; i < 15; i++) {
                dst[dstIndex + 2 * i + 1] = (byte) 0x43;
                dst[dstIndex + 2 * i + 2] = (byte) 0x41;
            }
            dst[dstIndex + TYPE_OFFSET] = (byte) (((hexCode & 0xF0) >> 4) + 0x41);
            dst[dstIndex + TYPE_OFFSET + 1] = (byte) ((hexCode & 0x0F) + 0x41);

     * implementation.
     */

    /** SMB2 negotiate protocol command */
    protected static final short SMB2_NEGOTIATE = 0x00;
    /** SMB2 session setup command */
    protected static final short SMB2_SESSION_SETUP = 0x01;
    /** SMB2 logoff command */
    protected static final short SMB2_LOGOFF = 0x02;
    /** SMB2 tree connect command */
    protected static final short SMB2_TREE_CONNECT = 0x0003;

            dst[dstIndex + 2 * i + 2] = (byte) ((tmp[i] & 0x0F) + 0x41);
        }
        for (; i < 15; i++) {
            dst[dstIndex + 2 * i + 1] = (byte) 0x43;
            dst[dstIndex + 2 * i + 2] = (byte) 0x41;
        }
        dst[dstIndex + TYPE_OFFSET] = (byte) (((this.hexCode & 0xF0) >> 4) + 0x41);
        dst[dstIndex + TYPE_OFFSET + 1] = (byte) ((this.hexCode & 0x0F) + 0x41);

    // relative to headerStart
    private static final int SETUP_OFFSET = 61;

    private static final int DISCONNECT_TID = 0x01;
    private static final int ONE_WAY_TRANSACTION = 0x02;

    private int pad;
    private int pad1;
    private boolean parametersDone, dataDone;

    protected int totalParameterCount;
    protected int totalDataCount;

     */
    @Test
    void testReadParameterWordsWireFormat() {
        SmbComWriteAndXResponse response = new SmbComWriteAndXResponse();
        byte[] buffer = new byte[] { 0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; // count = 10

        int bytesRead = response.readParameterWordsWireFormat(buffer, 0);

        // The count should be read from the buffer.
        assertEquals(10L, response.count);

        // Encode "TEST" (0x54 0x45 0x53 0x54)
        // T=0x54: upper nibble 0x5->F(0x46), lower nibble 0x4->E(0x45)
        src[1] = 'F';
        src[2] = 'E'; // T
        // E=0x45: upper nibble 0x4->E(0x45), lower nibble 0x5->F(0x46)
        src[3] = 'E';
        src[4] = 'F'; // E
        // S=0x53: upper nibble 0x5->F(0x46), lower nibble 0x3->D(0x44)
        src[5] = 'F';
        src[6] = 'D'; // S

        int written = trans2SetFileInfo.writeSetupWireFormat(buffer, 0);

        // Should write 2 bytes: subcommand and 0x00
        assertEquals(2, written);
        assertEquals(SmbComTransaction.TRANS2_SET_FILE_INFORMATION, buffer[0]);
        assertEquals(0x00, buffer[1]);
    }

    @Test
    @DisplayName("Test writeSetupWireFormat with offset")
    void testWriteSetupWireFormatWithOffset() {

        final int start = bufferIndex;

        buffer[bufferIndex] = (byte) 0x00; // Reserved
        bufferIndex++;
        buffer[bufferIndex++] = (byte) 0x00; // Reserved
        buffer[bufferIndex++] = (byte) 0x00; // Reserved

        this.totalParameterCount = SMBUtil.readInt4(buffer, bufferIndex);
        if (this.bufDataStart == 0) {

 */
public class NameServiceClientImpl implements Runnable, NameServiceClient {

    private static final int NAME_SERVICE_UDP_PORT = 137;

    static final byte[] UNKNOWN_MAC_ADDRESS = { (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00 };

    private static final Logger log = LoggerFactory.getLogger(NameServiceClientImpl.class);

    private final Object LOCK = new Object();

    private int nbnsIndex = 0;