public class DfsImpl implements DfsResolver {

    private static final DfsReferralDataImpl NEGATIVE_ENTRY = new DfsReferralDataImpl();

    private static class CacheEntry <T> {

        long expiration;
        Map<String, T> map;


        CacheEntry ( long ttl ) {
            this.expiration = System.currentTimeMillis() + ttl * 1000L;
            this.map = new ConcurrentHashMap<>();
        }
    }

        try ( SmbResource f = createTestFile() ) {
            try {
                long orig = f.createTime();
                long time = System.currentTimeMillis() - 60 * 60 * 12;
                f.setCreateTime(time);
                long newTime = f.createTime();
                if ( newTime == orig ) {
                    Assume.assumeTrue("Create time was not changed", false);

            finally {
                f.delete();
            }
        }
    }


    @Test
    public void testCopyFile () throws IOException {
        int bufSize = 65536;
        long length = 4096 * 16;
        try ( SmbFile f = createTestFile() ) {
            try ( SmbFile d1 = createTestDirectory();
                  SmbFile t = new SmbFile(d1, makeRandomName()) ) {
                try {

    protected String nativeOs;
    protected String nativeLanMan = "jCIFS";
    protected int vcNumber = 1;
    protected boolean dfsDisabled = false;
    protected long dfsTTL = 300;
    protected boolean dfsStrictView = false;
    protected boolean dfsConvertToFqdn;
    protected String logonShare;
    protected String defaultDomain;
    protected String defaultUserName;

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

    private long createTime;
    private long lastModified;
    private long lastAccess;
    private int attributes;
    private long attrExpiration;
    private long size;
    private long sizeExpiration;
    private boolean isExists;

    private CIFSContext transportContext;

    }


    @Override
    protected long makeKey ( Request request ) throws IOException {
        long m = this.mid.incrementAndGet() - 1;
        if ( !this.smb2 ) {
            m = ( m % 32000 );
        }
        ( (CommonServerMessageBlock) request ).setMid(m);
        return m;
    }


    @Override
    protected Long peekKey () throws IOException {
        do {

    private final SmbSessionImpl session;

    private volatile int tid = -1;
    private volatile String service = "?????";
    private volatile boolean inDfs, inDomainDfs;
    private volatile long treeNum; // used by SmbFile.isOpen

    private final AtomicLong usageCount = new AtomicLong(0);
    private final AtomicBoolean sessionAcquired = new AtomicBoolean(true);

    private final boolean traceResource;

    /**
     * 
     * 
     * Property <tt>jcifs.smb.client.dfs.ttl</tt> (int, default 300)
     * 
     * @return title to live, in seconds, for DFS cache entries
     */
    long getDfsTtl ();


    /**
     * 
     * Property <tt>jcifs.smb.client.dfs.strictView</tt> (boolean, default false)
     * 
     * @return whether a authentication failure during DFS resolving will throw an exception

    private String share;            // Can be null
    private long createTime;
    private long lastModified;
    private int attributes;
    private long attrExpiration;
    private long size;
    private long sizeExpiration;
    private boolean isExists;
    private int shareAccess = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;

        initCache(tc);
    }

    static final class CacheEntry {

        Name hostName;
        NbtAddress address;
        long expiration;


        CacheEntry ( Name hostName, NbtAddress address, long expiration ) {
            this.hostName = hostName;
            this.address = address;
            this.expiration = expiration;
        }
    }


    /**