/**
     * DFS resolver instance
     */
    protected static Dfs dfs;

    NtlmPasswordAuthentication auth; // Cannot be null
    SmbTree tree = null; // Initially null
    String unc; // Initially null; set by getUncPath; never ends with '/'
    int fid; // Initially 0; set by open()
    int type;
    boolean opened;
    int tree_num;

    /**