/**
 * Handles failover and recovery for multi-channel connections
 */
public class ChannelFailover {

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

    private final ChannelManager manager;
    private final ExecutorService executor;
    private final ConcurrentMap<String, FailoverState> failoverStates;

    /**
     * Create channel failover handler
     *

public class AuthenticationRateLimiter implements AutoCloseable {

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

    // Rate limiting configuration
    private final int maxAttemptsPerAccount;
    private final int maxAttemptsPerIp;
    private final int maxGlobalAttemptsPerMinute;
    private final Duration lockoutDuration;
    private final Duration cleanupInterval;

    // Tracking maps

    private static final int WITNESS_INTERFACE_VERSION = 1;

    // RPC connection parameters
    private static final int WITNESS_RPC_PORT = 135;
    private static final int WITNESS_RPC_TIMEOUT_MS = 5000;

    // RPC operation numbers
    private static final int WITNESS_REGISTER = 0;
    private static final int WITNESS_UNREGISTER = 1;
    private static final int WITNESS_ASYNC_NOTIFY = 2;
    private static final int WITNESS_HEARTBEAT = 3;

public class DirectoryCacheEntry {
    private final String directoryPath;
    private final Smb2LeaseKey leaseKey;
    private final long createTime;
    private volatile long lastUpdateTime;
    private volatile long lastAccessTime;
    
    // Cached directory contents
    private final ConcurrentHashMap<String, FileInfo> children;
    private final ReadWriteLock lock;
    
    // Cache metadata

class Trans2GetDfsReferralResponse extends SmbComTransactionResponse {

    class Referral {
        private int version;
        private int size;
        private int serverType;
        private int flags;
        private int proximity;
        private int pathOffset;
        private int altPathOffset;
        private int nodeOffset;
        private String altPath;

        int ttl;
        String path = null;
        String node = null;

     */
    public static class PoolHealthMetrics {
        private final int activeConnections;
        private final int nonPooledConnections;
        private final int trackedConnections;
        private final int maxPoolSize;
        private final long totalHealthChecks;
        private final long failedHealthChecks;
        private final long connectionsRemoved;
        private final int uniqueEndpoints;

    private static final int SHARING_DENY_NONE = 0x40;

    private static final int DO_NOT_CACHE = 0x1000; // bit 12
    private static final int WRITE_THROUGH = 0x4000; // bit 14

    private static final int OPEN_FN_CREATE = 0x10;
    private static final int OPEN_FN_FAIL_IF_EXISTS = 0x00;
    private static final int OPEN_FN_OPEN = 0x01;
    private static final int OPEN_FN_TRUNC = 0x02;

    private static final int TT_NOTHING = -4;

    private static final int NEED_CHAR = Integer.MAX_VALUE;

    private static final int QUOTE = '\'';

    private static final byte CT_WHITESPACE = 1;

    private static final byte CT_ALPHA = 4;

    private final byte[] ctype;

    private static byte[] defaultCtype = new byte[256];

    private final String str;

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

    private final SmbNamedPipe pipe;
    private final boolean transact;
    private final boolean call;

    private final int openFlags;
    private final int access;
    private volatile boolean open = true;

    private SmbFileHandleImpl handle;
    private SmbPipeOutputStream output;

        // Default constructor
    }

    private final AtomicLong rdmaReads = new AtomicLong();
    private final AtomicLong rdmaWrites = new AtomicLong();
    private final AtomicLong rdmaSends = new AtomicLong();
    private final AtomicLong rdmaReceives = new AtomicLong();
    private final AtomicLong bytesTransferred = new AtomicLong();
    private final AtomicLong operationErrors = new AtomicLong();