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

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

        for ( Entry<String, Map<String, CacheEntry<DfsReferralDataInternal>>> entry : domains.entrySet() ) {
            log.trace("Domain " + entry.getKey());
            for ( Entry<String, CacheEntry<DfsReferralDataInternal>> entry2 : entry.getValue().entrySet() ) {
                log.trace("  Root " + entry2.getKey());
                if ( entry2.getValue().map != null ) {

                }
                catch ( SmbException se ) {
                    if ( log.isTraceEnabled() ) {
                        log.trace("Send failed", se);
                        log.trace("Request: " + request);
                        log.trace("Response: " + response);
                    }
                    throw se;
                }
            }
            finally {

        if ( port <= 0 ) {
            port = SmbConstants.DEFAULT_PORT;
        }
        synchronized ( this.connections ) {
            cleanup();
            if ( log.isTraceEnabled() ) {
                log.trace("Exclusive " + nonPooled + " enforced signing " + forceSigning);
            }
            if ( !nonPooled && tc.getConfig().getSessionLimit() != 1 ) {

            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(),

        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

                SmbConstants.FILE_NO_SHARE,
                attrs,
                0);
        }
        catch ( SmbAuthException sae ) {
            log.trace("copyTo0", sae);
            int dattrs = dest.getAttributes();
            if ( ( dattrs & SmbConstants.ATTR_READONLY ) != 0 ) {
                /*
                 * Remove READONLY and try again
                 */

            off = ( off & 0xFFFF ) - this.converter;
            off = start + off;
            e.remark = readString(buffer, off, 128, false);

            if ( log.isTraceEnabled() ) {
                log.trace(e.toString());
            }
        }
        setResults(results);

        return bufferIndex - start;
    }


    @Override
    public String toString () {
        return new String(

    public void release () {
        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 ) {

                if ( log.isDebugEnabled() ) {
                    log.debug("File pointer is at " + this.fp);
                }
            }
            return this.handle;
        }

        log.trace("File already open");
        return this.handle.acquire();
    }


    protected SmbTreeHandleImpl ensureTreeConnected () throws CIFSException {
        return this.file.ensureTreeConnected();
    }