ip_address_t from_api(const vapi_type_address& v);
ip_address_t from_api(const vapi_type_ip4_address& v);
-vapi_type_mac_address to_api(const mac_address_t& a);
+void to_api(const mac_address_t& a, vapi_type_mac_address& m);
mac_address_t from_api(const vapi_type_mac_address& v);