+const char* socket_address_bind_ipv6_only_to_string(SocketAddressBindIPv6Only b);
+SocketAddressBindIPv6Only socket_address_bind_ipv6_only_from_string(const char *s);
+
+const char* netlink_family_to_string(int b);
+int netlink_family_from_string(const char *s);
+
+bool socket_ipv6_is_supported(void);
+