/**
 * Interface for RDMA provider implementations.
 *
 * This interface abstracts different RDMA implementations such as
 * InfiniBand, iWARP, RoCE, or TCP fallback providers.
 */
public interface RdmaProvider {

    /**
     * Check if RDMA is available on this system
     *
     * @return true if RDMA can be used, false otherwise
     */
    boolean isAvailable();

    /**

     */
    public static List<String> getAvailableProviders() {
        List<RdmaProvider> allProviders = Arrays.asList(new DisniRdmaProvider(), new TcpRdmaProvider());

        return allProviders.stream()
                .filter(RdmaProvider::isAvailable)
                .map(RdmaProvider::getProviderName)
                .collect(java.util.stream.Collectors.toList());
    }

    @Test
    public void testCreateProviderAuto() {
        RdmaProvider provider = RdmaProviderFactory.createProvider("auto");
        assertNotNull(provider, "Auto provider selection should return a provider");
        assertTrue(provider.isAvailable(), "Returned provider should be available");
    }

    @Test
    public void testCreateProviderTcp() {
        RdmaProvider provider = RdmaProviderFactory.createProvider("tcp");

import jcifs.internal.smb2.rdma.RdmaProvider;

/**
 * TCP fallback RDMA provider.
 *
 * This provider uses regular TCP connections but maintains the RDMA
 * interface for compatibility. It only supports send/receive operations
 * and does not provide true RDMA read/write capabilities.
 */
public class TcpRdmaProvider implements RdmaProvider {

    /**
     * Creates a new TCP RDMA provider instance

        this.delegate = delegate;
        this.rdmaProvider = RdmaProviderFactory.getProvider(context.getConfig());
        this.bufferManager = new RdmaBufferManager(rdmaProvider);
        this.statistics = new RdmaStatistics();

        log.debug("Created RDMA transport with provider: {}", rdmaProvider.getClass().getSimpleName());
    }

    /**

    public void testRdmaConfigurationProperties() throws CIFSException {
        Properties props = new Properties();
        props.setProperty("jcifs.smb.client.useRDMA", "true");
        props.setProperty("jcifs.smb.client.rdmaProvider", "disni");
        props.setProperty("jcifs.smb.client.rdmaReadWriteThreshold", "16384");
        props.setProperty("jcifs.smb.client.rdmaMaxSendSize", "131072");

import jcifs.internal.smb2.rdma.RdmaProvider;

/**
 * DiSNI RDMA provider for InfiniBand/RoCE networks.
 *
 * This provider uses the DiSNI (Direct Storage and Networking Interface)
 * library to provide high-performance RDMA operations over InfiniBand
 * and RoCE (RDMA over Converged Ethernet) networks.
 */
public class DisniRdmaProvider implements RdmaProvider {

    /**

 */
public class RdmaBufferManager implements AutoCloseable {

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

    private final RdmaProvider provider;
    private final ConcurrentLinkedQueue<RdmaMemoryRegion> availableSendRegions;
    private final ConcurrentLinkedQueue<RdmaMemoryRegion> availableReceiveRegions;
    private final AtomicLong totalAllocated;

import org.mockito.MockitoAnnotations;

import jcifs.internal.smb2.rdma.tcp.TcpMemoryRegion;

/**
 * Unit tests for RDMA buffer manager
 */
public class RdmaBufferManagerTest {

    @Mock
    private RdmaProvider mockProvider;

    private RdmaBufferManager bufferManager;
    private AutoCloseable mocks;

    @BeforeEach
    public void setUp() throws Exception {
        mocks = MockitoAnnotations.openMocks(this);