}

    /**
     * State tracking for channel failover
     */
    public static class FailoverState {

        private final String channelId;
        private final long failureTime;
        private int retryCount;
        private long nextRetryTime;

        /**
         * Create failover state
         *
         * @param channelId channel identifier
         */

- [ ] Create resource monitoring
- [ ] Implement automatic re-registration
- [ ] Add cluster node tracking
- [ ] Create failover coordination

#### 6.3 Integration Points
- Integrate with `CIFSContext` for witness support
- Modify `SmbTransport` for failover handling
- Update `DfsResolver` for witness-aware resolution

---

## Implementation Dependencies

```mermaid
graph TD

    @Mock
    private SmbTransport mockNewTransport;

    @Mock
    private CommonServerMessageBlock mockOperation;

    private ChannelFailover failover;
    private ChannelInfo failedChannel;

    @BeforeEach
    void setUp() throws UnknownHostException {
        failover = new ChannelFailover(mockChannelManager);

        InetAddress addr = InetAddress.getByName("192.168.1.100");

        assertEquals(1024, channel.getBytesSent());
        assertTrue(channel.getLastActivityTime() > 0);
    }

    @Test
    void testChannelFailover() throws Exception {
        // Test failover mechanism
        ChannelFailover failover = new ChannelFailover(channelManager);

        // Create a channel
        InetAddress addr = InetAddress.getByName("192.168.1.100");

## 1. Overview

SMB3 Multi-Channel enables the use of multiple network connections between client and server, providing increased throughput, network fault tolerance, and automatic failover capabilities. This feature aggregates bandwidth across multiple NICs and provides seamless failover when network paths fail.

## 2. Protocol Specification Reference

- **MS-SMB2 Section 3.2.4.23**: FSCTL_QUERY_NETWORK_INTERFACE_INFO

 */
public enum WitnessEventType {
    /**
     * Resource state changed - general resource state modification
     */
    RESOURCE_CHANGE(1),

    /**
     * Client should move to different node - directed failover
     */
    CLIENT_MOVE(2),

    /**
     * Share moved to different node - share mobility event
     */
    SHARE_MOVE(3),

    /**
     * IP address changed - network configuration change
     */

    
    // Simulate cluster failover (would require test environment setup)
    // ... trigger server failover ...
    
    // Verify that witness notification was received and handled
    assertTrue(listener.waitForNotification(30000));  // 30 second timeout
    
    // Verify file is still accessible after failover
    assertTrue(file.exists());
}

@Test

Calls are executed in one of two ways:

 * **Synchronous:** your thread blocks until the response is readable.

    private final List<NetworkInterfaceInfo> remoteInterfaces;
    private final ScheduledExecutorService scheduler;
    private final ChannelLoadBalancer loadBalancer;
    private final ChannelFailover failover;

    private volatile boolean multiChannelEnabled;
    private final int maxChannels;
    private final AtomicInteger channelCounter;

    /**
     * Create channel manager
     *

/**
 * SMB Witness Protocol client implementation as defined in MS-SWN specification.
 * Manages witness registrations, notifications, and heartbeats for cluster failover support.
 */
public class WitnessClient implements AutoCloseable {
    private static final Logger log = LoggerFactory.getLogger(WitnessClient.class);

    // Polling and backoff constants (in ms)