void testConstructor() {
        // Verify all fields are properly initialized
        assertNotNull(negotiation);
        assertSame(mockRequest, negotiation.getRequest());
        assertSame(mockResponse, negotiation.getResponse());
        assertSame(testRequestBuffer, negotiation.getRequestRaw());
        assertSame(testResponseBuffer, negotiation.getResponseRaw());
    }

    @Test
    @DisplayName("Constructor with null request should work")

        transport.close(); // release once
    }

    @Test
    @DisplayName("Server encryption key is returned for SMB1 negotiation only")
    void serverEncryptionKey() {
        // No negotiation yet -> null
        assertNull(transport.getServerEncryptionKey());

        // SMB1 negotiation with server data
        SmbComNegotiateResponse smb1 = new SmbComNegotiateResponse(ctx);
        ServerData sd = smb1.getServerData();

/**
 * Enhanced Pre-Authentication Integrity Service for SMB 3.1.1.
 *
 * Provides comprehensive pre-authentication integrity protection against
 * downgrade attacks by maintaining cryptographic hash chains of all
 * negotiation and session setup messages.
 */
public class PreauthIntegrityService {

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

    // Hash algorithm constants

     * @param skipAuthentication If true the negotiation is only done if it is
     * initiated by the client (MSIE post requests after successful NTLM SSP
     * authentication). If false and the user has not been authenticated yet
     * the client will be forced to send an authentication (server sends
     * HttpServletResponse.SC_UNAUTHORIZED).
     * @return True if the negotiation is complete, otherwise false

        assertEquals(0, messageBytes[9] & 0xFF);
        assertEquals(0, messageBytes[10] & 0xFF);
        assertEquals(0, messageBytes[11] & 0xFF);
    }

    @Test
    @DisplayName("Should handle Unicode negotiation flag")
    void testUnicodeNegotiation() {
        // Given
        int unicodeFlags = NtlmFlags.NTLMSSP_NEGOTIATE_UNICODE;
        int oemFlags = NtlmFlags.NTLMSSP_NEGOTIATE_OEM;

        // When

- [ ] Implement RDMA capability detection
- [ ] Create RDMA negotiation context
- [ ] Implement RDMA transport layer
- [ ] Add RDMA buffer registration
- [ ] Create RDMA read/write operations
- [ ] Implement RDMA credits management
- [ ] Add fallback to TCP when RDMA unavailable

#### 5.3 Integration Points
- Create new transport type alongside TCP
- Modify negotiation to include RDMA contexts
- Update read/write operations for RDMA

            log.debug("Secure negotiation does not apply");
            return;
        }

        final Smb2NegotiateResponse nego = (Smb2NegotiateResponse) trans.getNegotiateResponse();
        if (nego.getSelectedDialect().atLeast(DialectVersion.SMB311)) {
            // have preauth integrity instead
            log.debug("Secure negotiation does not apply, is SMB3.1");
            return;
        }

     *
     * @param req
     *            The servlet request
     * @param resp
     *            The servlet response
     * @param skipAuthentication
     *            If true the negotiation is only done if it is
     *            initiated by the client (MSIE post requests after successful NTLM SSP
     *            authentication). If false and the user has not been authenticated yet

    /**
     * Use SMB2 non-backward compatible negotiation style
     *
     * Property {@code jcifs.smb.client.useSMB2Negotiation} (boolean, default false)
     *
     * @return whether to use non-backward compatible protocol negotiation
     */
    boolean isUseSMB2OnlyNegotiation();

    /**
     * Enforce secure negotiation
     *

        }
    }

    @Override
    public RdmaNegotiateResponse negotiate(RdmaNegotiateRequest request) throws IOException {
        // Simulate successful negotiation for skeleton implementation
        RdmaNegotiateResponse response = new RdmaNegotiateResponse();
        response.setStatus(0); // Success
        response.setSelectedVersion(request.getMaxVersion());