/**
     * @param tc
     * 
     */
    public DfsImpl ( CIFSContext tc ) {}


    private Map<String, Map<String, CacheEntry<DfsReferralDataInternal>>> getTrustedDomains ( CIFSContext tf ) throws SmbAuthException {
        if ( tf.getConfig().isDfsDisabled() || tf.getCredentials().getUserDomain() == null || tf.getCredentials().getUserDomain().isEmpty() ) {
            return null;
        }