attrExpiration = sizeExpiration = System.currentTimeMillis() + attrExpirationPeriod;
    }

    private SmbComBlankResponse blank_resp() {
        if (blank_resp == null) {
            blank_resp = new SmbComBlankResponse();
        }
        return blank_resp;
    }

    void resolveDfs(final ServerMessageBlock request) throws SmbException {
        if (request instanceof SmbComClose) {