if ( log.isTraceEnabled() ) {
            log.trace(req.toString());
            log.trace(Hexdump.toHexString(this.sbuf, 4, n));
        }

        this.out.write(this.sbuf, 0, 4 + n);
        this.out.flush();
        log.trace("Wrote negotiate request");
        return n;
    }


    /**
     * @throws SocketException

                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);
            }

            off = ( off & 0xFFFF ) - this.converter;
            off = start + off;
            e.commentOrMasterBrowser = readString(buffer, off, 48, false);

            if ( log.isTraceEnabled() ) {
                log.trace(e.toString());
            }
        }
        setResults(results);
        this.lastName = e == null ? null : e.name;
        return bufferIndex - start;
    }


    @Override

                throw new SmbException("Invalid operation for workgroups, servers, or shares");
            }

            if ( !sh.isSameTree(th) ) {
                // trigger requests to resolve the actual target
                exists();
                dest.exists();

            int n;
            if ( ( n = readParameterWordsWireFormat(buffer, bufferIndex) ) != this.wordCount * 2 ) {
                if ( log.isTraceEnabled() ) {
                    log.trace("wordCount * 2=" + ( this.wordCount * 2 ) + " but readParameterWordsWireFormat returned " + n);
                }
            }
            bufferIndex += this.wordCount * 2;
        }

        this.macSigningKey = macSigningKey;
        this.signSequence = initialSequence;
        this.bypass = bypass;

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


    /**
     * This constructor used to instance a SigningDigest object for

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

                    response.notify();
                }
            }
        }
        catch ( SocketTimeoutException ste ) {
            log.trace("Socket timeout", ste);
        }
        catch ( Exception ex ) {

#log4j.logger.jcifs.smb.SmbTransportImpl: DEBUG
#log4j.logger.jcifs.util.transport.Transport: DEBUG
#log4j.logger.jcifs.smb.DfsImpl: DEBUG
#log4j.logger.jcifs.smb: DEBUG
#log4j.logger.jcifs.smb.SmbFileOutputStream: TRACE
#log4j.logger.jcifs.smb.SigningDigest: TRACE

     * @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 ) {

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