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     */
    int FLAGS_PATH_NAMES_CANONICALIZED = 0x10;
    /**
     * Opportunistic lock requested or granted flag.
     */
    int FLAGS_OPLOCK_REQUESTED_OR_GRANTED = 0x20;
    /**
     * Notify client of any action which modified the file flag.
     */
    int FLAGS_NOTIFY_OF_MODIFY_ACTION = 0x40;
    /**
     * Message is a response from server flag.
     */
    int FLAGS_RESPONSE = 0x80;

    /**

        }

        return clearText;
    }

    // Tables, permutations, S-boxes, etc.

    private static byte[] bytebit =
            { (byte) 0x80, (byte) 0x40, (byte) 0x20, (byte) 0x10, (byte) 0x08, (byte) 0x04, (byte) 0x02, (byte) 0x01 };
    private static int[] bigbyte = { 0x800000, 0x400000, 0x200000, 0x100000, 0x080000, 0x040000, 0x020000, 0x010000, 0x008000, 0x004000,

 */
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;

To learn more, check the <a href="https://docs.pydantic.dev/latest/concepts/dataclasses/" class="external-link" target="_blank">Pydantic docs about dataclasses</a>.

## Version { #version }

        // SMB1 header
        validator.validateSmbHeader(0x424D53FF, 32, 0x72);

        // SMB2 header
        validator.validateSmbHeader(0x424D53FE, 64, 0x00);
    }

    @Test
    public void testInvalidProtocolId() throws Exception {
        assertThrows(SmbException.class, () -> {
            validator.validateSmbHeader(0xDEADBEEF, 64, 0x00);
        });
    }

    @Test

            this.andx = null;

            dst[start + ANDX_COMMAND_OFFSET] = (byte) 0xFF;
            dst[start + ANDX_RESERVED_OFFSET] = (byte) 0x00;
            // dst[start + ANDX_OFFSET_OFFSET] = (byte)0x00;
            // dst[start + ANDX_OFFSET_OFFSET + 1] = (byte)0x00;
            dst[start + ANDX_OFFSET_OFFSET] = (byte) 0xde;
            dst[start + ANDX_OFFSET_OFFSET + 1] = (byte) 0xde;

                    return null;
                }
                return (long) Encdec.dec_uint64le(this.sbuf, 28);
            }

            if (this.sbuf[0] == (byte) 0x00 && this.sbuf[1] == (byte) 0x00 && this.sbuf[4] == (byte) 0xFF && this.sbuf[5] == (byte) 'S'
                    && this.sbuf[6] == (byte) 'M' && this.sbuf[7] == (byte) 'B') {
                break; /* all good (SMB) */
            }

        // When/Then - Should throw UnknownHostException quickly
        UnknownHostException exception = assertThrows(UnknownHostException.class, () -> {
            nameServiceClient.getNbtByName("NONEXISTENT-FAST-FAIL", 0x20, null);
        }, "Should throw UnknownHostException for non-existent NetBIOS name with type");

        // Verify the exception message indicates name resolution failure

        void setup() throws GeneralSecurityException {
            digest = new Smb2SigningDigest(sessionKey, Smb2Constants.SMB2_DIALECT_0202, null);
            data = new byte[128];
            Arrays.fill(data, (byte) 0x00);

            // Set up mock messages
            request = mock(CommonServerMessageBlock.class);
            response = mock(CommonServerMessageBlock.class);
        }

        @Test