DfsReferralDataInternal dr = null;
        if (log.isTraceEnabled()) {
            log.trace("Is a domain referral for " + domain);
        }

        if (log.isTraceEnabled()) {
            log.trace("Resolving root " + root);
        }
        /*

                req = new NtTransNotifyChange(th.getConfig(), this.handle.getFid(), this.filter, this.recursive);
                resp = new NtTransNotifyChangeResponse(th.getConfig());
            }

            if (log.isTraceEnabled()) {
                log.trace("Sending NtTransNotifyChange for " + this.handle);
            }
            try {
                resp = th.send(req, resp, RequestParam.NO_TIMEOUT, RequestParam.NO_RETRY);

                        if (log.isTraceEnabled()) {
                            log.debug("Cannot reuse, signing enforced on connection " + conn);
                        }
                        continue;
                    }

                    if (!conn.getNegotiateResponse().canReuse(tc, forceSigning)) {
                        if (log.isTraceEnabled()) {

        }

        if (this.serverSignature == null || this.kdcSignature == null || this.logonInfo == null) {
            throw new PACDecodingException("Missing required buffers");
        }

        if (log.isTraceEnabled()) {
            log.trace(String.format("Checksum data %s type %d signature %s", Hexdump.toHexString(checksumData),
                    this.serverSignature.getType(), Hexdump.toHexString(this.serverSignature.getChecksum())));

     */
    protected byte[] makeAuthenticate(final byte[] token) throws SmbException {
        try {
            final Type2Message msg2 = new Type2Message(token);

            if (log.isTraceEnabled()) {
                log.trace(msg2.toString());
                log.trace(Hexdump.toHexString(token));
            }

            this.serverChallenge = msg2.getChallenge();

                }
                synchronized (response) {
                    response.readWireFormat(this.rcv_buf, 0);
                    response.received = true;

                    if (log.isTraceEnabled()) {
                        log.trace(response.toString());
                        log.trace(Hexdump.toHexString(this.rcv_buf, 0, this.in.getLength()));
                    }

                    response.notify();

        this.digest = Crypto.getMD5();
        this.macSigningKey = macSigningKey;
        this.signSequence = initialSequence;
        this.bypass = bypass;

        if (log.isTraceEnabled()) {
            log.trace("macSigningKey:");
            log.trace(Hexdump.toHexString(macSigningKey, 0, macSigningKey.length));
        }
    }

    /**

            if (ssn.matches(tf, targetHost, targetDomain)) {
                if (log.isTraceEnabled()) {
                    log.trace("Reusing existing session " + ssn);
                }
                return ssn.acquire();
            }
            if (log.isTraceEnabled()) {
                log.trace("Existing session " + ssn + " does not match " + tf.getCredentials());
            }
        }

    }

    /**
     * @return session increased usage count
     */
    public SmbSessionImpl acquire() {
        long usage = this.usageCount.incrementAndGet();
        if (log.isTraceEnabled()) {
            log.trace("Acquire session " + usage + " " + this);
        }

        if (usage == 1) {
            synchronized (this) {

    public synchronized void release() throws CIFSException {
        final long usage = this.usageCount.decrementAndGet();
        if (usage == 0) {
            closeInternal(0L, false);
        } else if (log.isTraceEnabled()) {
            log.trace(String.format("Release %s (%d)", this, usage));
        }
    }

    /**
     * {@inheritDoc}
     *
     * @see java.lang.Object#finalize()
     */
    @Override