// ensure file is open
        if (this.handle == null || !this.handle.isValid()) {
            // one extra acquire to keep this open till the stream is released
            this.handle =
                    this.file.openUnshared(this.openFlags, this.access, this.sharing, SmbConstants.ATTR_NORMAL, this.options).acquire();
            return this.handle;
        }
        return this.handle.acquire();
    }

    /**

import jcifs.internal.SMBProtocolDecodingException;
import jcifs.internal.smb2.create.CreateContextResponse;

/**
 * SMB2 Durable Handle Response Create Context
 *
 * MS-SMB2 Section 2.2.14.2.3
 */
public class DurableHandleResponse implements CreateContextResponse {

    /**
     * Context name for durable handle response
     */
    public static final String CONTEXT_NAME = "DHnQ";

        this.registrationId = registrationId;
    }

    /**
     * Gets the context handle.
     *
     * @return the context handle
     */
    public byte[] getContextHandle() {
        return contextHandle;
    }

    /**
     * Sets the context handle.
     *
     * @param contextHandle the context handle
     */
    public void setContextHandle(byte[] contextHandle) {

            configField.setAccessible(true);
            assertEquals(mockConfig, configField.get(request));
        }

        @Test
        @DisplayName("Should handle null configuration")
        void testConstructorWithNullConfig() {
            assertDoesNotThrow(() -> {
                Smb2EchoRequest request = new Smb2EchoRequest(null);
                assertNotNull(request);

    }

    @Test
    @DisplayName("getUrlHandler should return initialized URL handler")
    void testGetUrlHandler() {
        // When
        URLStreamHandler urlHandler = context.getUrlHandler();

        // Then
        assertNotNull(urlHandler, "URL handler should not be null");
        assertSame(urlHandler, context.getUrlHandler(), "Should return same instance on multiple calls");

package jcifs.internal.smb2.persistent;

/**
 * Constants for SMB2/3 durable and persistent handle capabilities.
 */
public final class Smb2HandleCapabilities {

    /**
     * Flag indicating persistent handle capability
     */
    public static final int SMB2_DHANDLE_FLAG_PERSISTENT = 0x00000002;

    /**
     * Default timeout for durable handles (2 minutes)
     */
    public static final long DEFAULT_DURABLE_TIMEOUT = 120000;

package jcifs.smb1.dcerpc.msrpc;

/**
 * MSRPC implementation for opening an LSA policy handle.
 * This class provides functionality to open a handle to the LSA policy
 * database on a remote server using the LSA RPC interface.
 */
public class MsrpcLsarOpenPolicy2 extends lsarpc.LsarOpenPolicy2 {

    /**
     * Creates a new request to open an LSA policy handle.
     *
     * @param server the server name to connect to

package jcifs.dcerpc.msrpc;

/**
 * MSRPC implementation for opening an LSA policy handle.
 * This class provides functionality to open a handle to the LSA policy
 * database on a remote server using the LSA RPC interface.
 */
public class MsrpcLsarOpenPolicy2 extends lsarpc.LsarOpenPolicy2 {

    /**
     * Creates a new request to open an LSA policy handle.
     *
     * @param server the server name to connect to

    /**
     * Construct bind message
     *
     */
    public DcerpcBind() {
    }

    DcerpcBind(final DcerpcBinding binding, final DcerpcHandle handle) {
        this.binding = binding;
        this.max_xmit = handle.getMaxXmit();
        this.max_recv = handle.getMaxRecv();
        this.ptype = 11;
        this.flags = DCERPC_FIRST_FRAG | DCERPC_LAST_FRAG;
    }

    @Override
    public int getOpnum() {

    /**
     * Constructs a new DcerpcBind message.
     */
    public DcerpcBind() {
    }

    DcerpcBind(final DcerpcBinding binding, final DcerpcHandle handle) {
        this.binding = binding;
        max_xmit = handle.max_xmit;
        max_recv = handle.max_recv;
        ptype = 11;
        flags = DCERPC_FIRST_FRAG | DCERPC_LAST_FRAG;
    }

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