return null;
        }

        String contextName = new String(nameBytes, StandardCharsets.US_ASCII);

        switch (contextName) {
        case LeaseV1CreateContextRequest.CONTEXT_NAME: // "RqLs"
            return new LeaseV1CreateContextResponse();
        case LeaseV2CreateContextRequest.CONTEXT_NAME: // "RqL2"
            return new LeaseV2CreateContextResponse();

public class DurableHandleReconnectResponse implements CreateContextResponse {

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

    private static final byte[] CONTEXT_NAME_BYTES = CONTEXT_NAME.getBytes();

    // The response structure is empty (0 bytes) for reconnect
    // No data is returned in a successful reconnect response

    /**

 */
public class LeaseV1CreateContextResponse implements CreateContextResponse {

    /**
     * Context name for lease response
     */
    public static final String CONTEXT_NAME = "RqLs";

    private static final byte[] CONTEXT_NAME_BYTES = CONTEXT_NAME.getBytes();

    private Smb2LeaseKey leaseKey;
    private int leaseState;
    private int leaseFlags;

    /**
     * Create a new lease V1 context response
     */

 */
public class LeaseV2CreateContextResponse implements CreateContextResponse {

    /**
     * Context name for lease V2 response
     */
    public static final String CONTEXT_NAME = "RqL2";

    private static final byte[] CONTEXT_NAME_BYTES = CONTEXT_NAME.getBytes();

    private Smb2LeaseKey leaseKey;
    private int leaseState;
    private int leaseFlags;
    private Smb2LeaseKey parentLeaseKey;
    private int epoch;

 */
public class DurableHandleResponse implements CreateContextResponse {

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

    private static final byte[] CONTEXT_NAME_BYTES = CONTEXT_NAME.getBytes();

    // The response structure is reserved and must be zero (8 bytes)
    private byte[] reserved = new byte[8];

    /**

 */
public class LeaseV2CreateContextRequest implements CreateContextRequest {

    /**
     * Context name for lease V2 request
     */
    public static final String CONTEXT_NAME = "RqL2";

    private static final byte[] CONTEXT_NAME_BYTES = CONTEXT_NAME.getBytes();

    private Smb2LeaseKey leaseKey;
    private int leaseState;
    private int leaseFlags;
    private Smb2LeaseKey parentLeaseKey;
    private int epoch;

 */
public class DurableHandleV2Response implements CreateContextResponse {

    /**
     * Context name for durable handle V2 response
     */
    public static final String CONTEXT_NAME = "DH2Q";

    private static final byte[] CONTEXT_NAME_BYTES = CONTEXT_NAME.getBytes();

    private long timeout100Ns; // timeout in 100-nanosecond intervals (wire format, unsigned 32-bit)
    private int flags;

    /**

 */
public class DurableHandleRequest implements CreateContextRequest {

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

    private static final byte[] CONTEXT_NAME_BYTES = CONTEXT_NAME.getBytes();
    private static final int STRUCTURE_SIZE = 16;

    private long reserved; // Must be zero

    /**
     * Create a new durable handle request
     */

 */
public class DurableHandleReconnect implements CreateContextRequest {

    /**
     * Context name for durable handle reconnect
     */
    public static final String CONTEXT_NAME = "DHnC";

    private static final byte[] CONTEXT_NAME_BYTES = CONTEXT_NAME.getBytes();
    private static final int STRUCTURE_SIZE = 16;

    private byte[] fileId; // 16-byte file ID from previous open

    /**

 */
public class LeaseV1CreateContextRequest implements CreateContextRequest {

    /**
     * Context name for lease request
     */
    public static final String CONTEXT_NAME = "RqLs";

    private static final byte[] CONTEXT_NAME_BYTES = CONTEXT_NAME.getBytes();

    private Smb2LeaseKey leaseKey;
    private int leaseState;
    private int leaseFlags;

    /**
     * Create a new lease V1 context request
     */