static final byte SMB_COM_DELETE_DIRECTORY = (byte) 0x01;
    static final byte SMB_COM_CLOSE = (byte) 0x04;
    static final byte SMB_COM_DELETE = (byte) 0x06;
    static final byte SMB_COM_RENAME = (byte) 0x07;
    static final byte SMB_COM_QUERY_INFORMATION = (byte) 0x08;
    static final byte SMB_COM_WRITE = (byte) 0x0B;
    static final byte SMB_COM_CHECK_DIRECTORY = (byte) 0x10;
    static final byte SMB_COM_TRANSACTION = (byte) 0x25;

     */
    private static byte[] messageHeader(int length) {
        byte[] h = new byte[4];
        h[0] = (byte) SessionServicePacket.SESSION_MESSAGE;
        h[1] = (byte) ((length >> 16) & 0x01);
        h[2] = (byte) ((length >> 8) & 0xFF);
        h[3] = (byte) (length & 0xFF);
        return h;
    }

    /**
     * Creates a NetBIOS keep-alive header.

### 3.1 Lease State Flags
```java
public class Smb2LeaseState {
    // Lease state flags (can be combined)
    public static final int SMB2_LEASE_NONE           = 0x00;
    public static final int SMB2_LEASE_READ_CACHING   = 0x01;  // R - Read caching
    public static final int SMB2_LEASE_HANDLE_CACHING = 0x02;  // H - Handle caching  
    public static final int SMB2_LEASE_WRITE_CACHING  = 0x04;  // W - Write caching
    
    // Common combinations

 *
 * <p><b>Compatibility note:</b> Throughout this API, multibyte values are always interpreted in
 * <i>little-endian</i> order. That is, hashing the byte array {@code {0x01, 0x02, 0x03, 0x04}} is
 * equivalent to hashing the {@code int} value {@code 0x04030201}. If this isn't what you need,
 * methods such as {@link Integer#reverseBytes} and {@link Ints#toByteArray} will help.
 *

        // Verify content
        assertEquals(SmbComTransaction.TRANS2_QUERY_FS_INFORMATION, buffer[0]);
        assertEquals(0x00, buffer[1]);
        assertEquals(0x03, buffer[2]); // Low byte of 0x0103
        assertEquals(0x01, buffer[3]); // High byte of 0x0103
    }

    @DisplayName("Test toString with different information levels")
    @ParameterizedTest
    @CsvSource({ "-1, fff", // SMB_INFO_ALLOCATION

    @DisplayName("Test attributes with OR operation")
    void testAttributesWithOrOperation() {
        // The constructor ORs attributes with 0x80
        trans2SetFileInfo = new Trans2SetFileInformation(config, TEST_FID, 0x01, // FILE_ATTRIBUTE_READONLY
                TEST_CREATE_TIME, TEST_LAST_WRITE_TIME, TEST_LAST_ACCESS_TIME);

        // The constructor should create FileBasicInfo with attributes | 0x80

        }

        @Test
        @DisplayName("setAttributes should accept valid attributes")
        void testSetAttributes() throws CIFSException {
            // Given
            int newAttributes = 0x01; // FILE_ATTRIBUTE_READONLY

            // When/Then
            assertDoesNotThrow(() -> mockResource.setAttributes(newAttributes), "Setting attributes should not throw exception");

     * This operation releases resources associated with the handle.
     */
    public static class SamrCloseHandle extends DcerpcMessage {

        @Override
        public int getOpnum() {
            return 0x01;
        }

        /** The return value of the operation */
        public int retval;
        /** The handle to be closed */
        public rpc.policy_handle handle;

        /**

                    if (nbaddr != null) {
                        final int code = nbaddr.getNameType();
                        if (code == 0x1d || code == 0x1b) {
                            this.type = SmbConstants.TYPE_WORKGROUP;
                            return this.type;
                        }
                    }

     * This operation releases resources associated with the handle.
     */
    public static class SamrCloseHandle extends DcerpcMessage {

        @Override
        public int getOpnum() {
            return 0x01;
        }

        /** The return value of the operation */
        public int retval;
        /** The handle to be closed */
        public rpc.policy_handle handle;

        /**