String path,
                int rn) throws SmbException {
        SmbTree ipc = getSmbSession( auth ).getSmbTree( "IPC$", null );
        Trans2GetDfsReferralResponse resp = new Trans2GetDfsReferralResponse();
        ipc.send( new Trans2GetDfsReferral( path ), resp );

        if (resp.numReferrals == 0) {
            return null;
        } else if (rn == 0 || resp.numReferrals < rn) {