public static final int SMB2_DIALECT_0311 = 0x0311;

    /**
     * SMB2 wildcard dialect for negotiation
     */
    public static final int SMB2_DIALECT_ANY = 0x02FF;

    /**
     * Server supports DFS
     */
    public static final int SMB2_GLOBAL_CAP_DFS = 0x1;

    /**
     * Server supports leasing
     */
    public static final int SMB2_GLOBAL_CAP_LEASING = 0x2;

    /**

    protected int vcNumber = 1;
    /** Whether DFS support is disabled */
    protected boolean dfsDisabled = false;
    /** DFS cache time-to-live in seconds */
    protected long dfsTTL = 300;
    /** Whether to use strict DFS path resolution */
    protected boolean dfsStrictView = false;
    /** Whether to convert DFS paths to FQDN */
    protected boolean dfsConvertToFqdn;

        // Arrange: configure the mock to throw
        doThrow(new CIFSException("DFS resolution failed")).when(handle).ensureDFSResolved();

        // Act + Assert: exception is propagated with message
        CIFSException ex = assertThrows(CIFSException.class, () -> handle.ensureDFSResolved());
        assertEquals("DFS resolution failed", ex.getMessage());
        verify(handle, times(1)).ensureDFSResolved();
    }

        // Mock credentials to avoid NullPointerException
        when(ctx.getCredentials()).thenReturn(credentials);
        when(credentials.getUserDomain()).thenReturn("DOMAIN");
        // Mock DFS resolver
        when(ctx.getDfs()).thenReturn(dfsResolver);
    }

    // Helper to set private field 'tree'
    private static void setTree(SmbTreeConnection c, SmbTreeImpl tree) {
        try {

 *
 * @author mbechler
 *
 */
public class Smb2IoctlRequest extends ServerMessageBlock2Request<Smb2IoctlResponse> implements RequestWithFileId {

    /**
     * Function code to retrieve DFS referrals
     */
    public static final int FSCTL_DFS_GET_REFERRALS = 0x0060194;
    /**
     * Function code to peek at named pipe data without removing it
     */

     * @return the server connected to
     */
    public abstract String getServer();

    /**
     * Gets the server hostname resolved through DFS (Distributed File System)
     * @return the server resolved by DFS
     */
    public abstract String getServerWithDfs();

    /**
     * Gets the CIFS context used for transport operations
     * @return the transport context used
     */

import jcifs.internal.SMBSigningDigest;
import jcifs.internal.SmbNegotiation;
import jcifs.internal.SmbNegotiationResponse;
import jcifs.internal.dfs.DfsReferralDataImpl;
import jcifs.internal.dfs.DfsReferralRequestBuffer;
import jcifs.internal.dfs.DfsReferralResponseBuffer;
import jcifs.internal.dfs.Referral;
import jcifs.internal.smb1.AndXServerMessageBlock;
import jcifs.internal.smb1.ServerMessageBlock;

- **SLF4J Logging**: Comprehensive logging throughout the codebase
- **Resource Management**: AutoCloseable patterns for file handles and connections
- **Thread Safety**: Components support concurrent access
- **DFS Support**: Distributed File System resolution
- **Streaming Operations**: Efficient directory listings and file operations
- **Buffer Caching**: Optimized buffer management
- **DCE/RPC Protocol**: Support for advanced operations

 */
package jcifs.internal.smb2.ioctl;

import jcifs.Configuration;
import jcifs.Decodable;
import jcifs.internal.SMBProtocolDecodingException;
import jcifs.internal.dfs.DfsReferralResponseBuffer;
import jcifs.internal.smb2.ServerMessageBlock2Response;
import jcifs.internal.util.SMBUtil;
import jcifs.smb.NtStatus;
import jcifs.smb.SmbException;

/**

    @Test
    @DisplayName("Should check DFS support correctly")
    void testIsDFSSupported() throws Exception {
        // Test with DFS capability enabled
        setPrivateField(response, "commonCapabilities", Smb2Constants.SMB2_GLOBAL_CAP_DFS);
        when(mockConfig.isDfsDisabled()).thenReturn(false);
        assertTrue(response.isDFSSupported());

        // Test with DFS disabled in config