static CloseableIterator<SmbResource> doEnum ( SmbFile parent, String wildcard, int searchAttributes, ResourceNameFilter fnf, ResourceFilter ff )
            throws CIFSException {
        DosFileFilter dff = unwrapDOSFilter(ff);
        if ( dff != null ) {
            if ( dff.wildcard != null )
                wildcard = dff.wildcard;
            searchAttributes = dff.attributes;
        }