// SMB3 Compression Algorithms
    /** No compression */
    public static final int COMPRESSION_NONE = 0x0;
    /** LZ77 compression */
    public static final int COMPRESSION_LZ77 = 0x1;
    /** LZ77 + Huffman compression */
    public static final int COMPRESSION_LZ77_HUFFMAN = 0x2;
    /** LZNT1 compression (Windows standard) */
    public static final int COMPRESSION_LZNT1 = 0x3;

    void testDefaultFlags() {
        assertEquals(0, msg.getFlags(), "Initial flags should be 0");
    }

    @ParameterizedTest(name = "setFlags({0}) ➜ getFlags() == {0}")
    @ValueSource(ints = { 0x0, 0x1, 0x2, 0xFFFFFFFF, -123456 })
    void testSetAndGetFlags(int value) {
        msg.setFlags(value);
        assertEquals(value, msg.getFlags(), "getFlags should return the value set");
    }

    @Test

        // Verify structure size (25)
        assertEquals(25, SMBUtil.readInt2(buffer, bodyOffset));

        // Verify session binding flag (0x1)
        assertEquals(0x1, buffer[bodyOffset + 2]);

        // Verify security mode
        assertEquals(TEST_SECURITY_MODE, buffer[bodyOffset + 3]);

        // Verify capabilities

public interface CompressionService {

    /**
     * Compression algorithm constants matching SMB3 specification.
     */
    public static final int COMPRESSION_NONE = 0x0;
    public static final int COMPRESSION_LZ77 = 0x1;
    public static final int COMPRESSION_LZ77_HUFFMAN = 0x2;
    public static final int COMPRESSION_LZNT1 = 0x3;
    public static final int COMPRESSION_PATTERN_V1 = 0x4;

    /**

   * represent the length.
   */
  internal const val B1_MASK_LENGTH = 127

  internal const val OPCODE_CONTINUATION = 0x0
  internal const val OPCODE_TEXT = 0x1
  internal const val OPCODE_BINARY = 0x2

  internal const val OPCODE_CONTROL_CLOSE = 0x8
  internal const val OPCODE_CONTROL_PING = 0x9
  internal const val OPCODE_CONTROL_PONG = 0xa

  /**

        } else {
            // neither SHARE_READ nor SHARE_WRITE are set
            this.desiredAccess |= SHARING_DENY_READ_WRITE_EXECUTE;
        }

        this.desiredAccess &= ~0x1; // Win98 doesn't like GENERIC_READ ?! -- get Access Denied.

        // searchAttributes
        this.searchAttributes = SmbConstants.ATTR_DIRECTORY | SmbConstants.ATTR_HIDDEN | SmbConstants.ATTR_SYSTEM;

    class ConstantValueTests {

        @Test
        @DisplayName("Should have correct constant values")
        void testConstantValues() {
            assertEquals(0x1, PreauthIntegrityNegotiateContext.NEGO_CTX_PREAUTH_TYPE);
            assertEquals(0x1, PreauthIntegrityNegotiateContext.HASH_ALGO_SHA512);
        }
    }

    @Nested
    @DisplayName("Edge Case Tests")
    class EdgeCaseTests {

        @Test

    protected int writeBytesWireFormat(final byte[] dst, int dstIndex) {
        final int start = dstIndex;

        SMBUtil.writeInt2(25, dst, dstIndex);

        dst[dstIndex + 2] = (byte) (this.sessionBinding ? 0x1 : 0);
        dst[dstIndex + 3] = (byte) this.securityMode;
        dstIndex += 4;

        SMBUtil.writeInt4(this.capabilities, dst, dstIndex);
        dstIndex += 4;

    private static final Logger log = LoggerFactory.getLogger(Smb2CloseResponse.class);

    /**
     * Flag to query attributes after close
     */
    public static final int SMB2_CLOSE_FLAG_POSTQUERY_ATTIB = 0x1;

    private final byte[] fileId;
    private final String fileName;
    private int closeFlags;
    private long creationTime;
    private long lastAccessTime;
    private long lastWriteTime;

     */

    static final int FILE_SUPERSEDE = 0x0;

    /* Open the file or fail if it does not exist
     * aka OPEN_EXISTING
     */

    static final int FILE_OPEN = 0x1;

    /* Create the file or fail if it does not exist
     * aka CREATE_NEW
     */

    static final int FILE_CREATE = 0x2;

    /* Open the file or create it if it does not exist
     * aka OPEN_ALWAYS