+ /**
+ * mode for the tunnel
+ */
+ struct mode_t : public enum_base<mode_t>
+ {
+ ~mode_t() = default;
+ const static mode_t STANDARD;
+ const static mode_t GBP;
+ const static mode_t GPE;
+
+ private:
+ mode_t(int v, const std::string s);
+ mode_t() = default;
+ };
+