}
            else if ( ncr.getContextType() == PreauthIntegrityNegotiateContext.NEGO_CTX_PREAUTH_TYPE ) {
                log.error("Multiple preauth negotiate contexts");
                return false;
            }
        }

        if ( !foundPreauth ) {
            log.error("Missing preauth negotiate context");
            return false;
        }

            if ( mode.equals("r") ) {
                this.openFlags = SmbConstants.O_CREAT | SmbConstants.O_RDONLY;
                this.access = SmbConstants.FILE_READ_DATA;
            }
            else if ( mode.equals("rw") ) {
                this.openFlags = SmbConstants.O_CREAT | SmbConstants.O_RDWR | SmbConstants.O_APPEND;
                this.write_andx_resp = new SmbComWriteAndXResponse(th.getConfig());

                Smb2CreateRequest req = new Smb2CreateRequest(config, uncPath);
                req.setDesiredAccess(access);

                if ( ( flags & SmbConstants.O_TRUNC ) == O_TRUNC && ( flags & SmbConstants.O_CREAT ) == O_CREAT ) {
                    req.setCreateDisposition(Smb2CreateRequest.FILE_OVERWRITE_IF);
                }
                else if ( ( flags & SmbConstants.O_TRUNC ) == O_TRUNC ) {

            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 {