static final int O_WRONLY = 0x02;
    static final int O_RDWR   = 0x03;
    static final int O_APPEND = 0x04;

    // Open Function Encoding
    // create if the file does not exist
    static final int O_CREAT  = 0x0010;
    // fail if the file exists
    static final int O_EXCL   = 0x0020;
    // truncate if the file exists
    static final int O_TRUNC  = 0x0040;

    // share access
/**

            return;
        }

        Smb2NegotiateResponse nego = (Smb2NegotiateResponse) trans.getNegotiateResponse();
        if ( nego.getSelectedDialect().atLeast(DialectVersion.SMB311) ) {
            // have preauth integrity instead
            log.debug("Secure negotiation does not apply, is SMB3.1");
            return;
        }

            updatePreauthHash(resp.getRequestRaw());
            updatePreauthHash(resp.getResponseRaw());
            if ( log.isDebugEnabled() ) {
                log.debug("Preauth hash after negotiate " + Hexdump.toHexString(this.preauthIntegrityHash));
            }
        }
    }


    protected synchronized void doDisconnect ( boolean hard ) throws IOException {