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

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

     */
    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();

            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

    }

    /**
     * @return tree connection with increased usage count
     */
    public SmbTreeConnection acquire() {
        final long usage = this.usageCount.incrementAndGet();
        if (log.isTraceEnabled()) {
            log.trace("Acquire tree connection " + usage + " " + this);
        }

        if (usage == 1) {
            synchronized (this) {
                try (SmbTreeImpl t = getTree()) {

     * @param track
     * @return tree with increased usage count
     */
    public SmbTreeImpl acquire(final boolean track) {
        final long usage = this.usageCount.incrementAndGet();
        if (log.isTraceEnabled()) {
            log.trace("Acquire tree " + usage + " " + this);
        }

        if (track && this.traceResource) {
            synchronized (this.acquires) {

     */
    public void release() {
        final long usage = this.usageCount.decrementAndGet();
        if (log.isTraceEnabled()) {
            log.trace("Release transport " + usage + " " + this);
        }

        if (usage == 0) {
            if (log.isTraceEnabled()) {
                log.trace("Transport usage dropped to zero " + this);
            }
        } else if (usage < 0) {

            throw new IOException("Bad file descriptor");
        }
        // ensure file is open
        try (SmbFileHandleImpl fd = ensureOpen(); SmbTreeHandleImpl th = fd.getTree()) {

            if (log.isTraceEnabled()) {
                log.trace("read: fid=" + fd + ",off=" + off + ",len=" + len);
            }

            final int type = this.file.getType();
            int r, n;