int netdev_set_in4(struct netdev *, struct in_addr addr, struct in_addr mask);
int netdev_get_in6(const struct netdev *, struct in6_addr *);
int netdev_add_router(struct netdev *, struct in_addr router);
int netdev_set_in4(struct netdev *, struct in_addr addr, struct in_addr mask);
int netdev_get_in6(const struct netdev *, struct in6_addr *);
int netdev_add_router(struct netdev *, struct in_addr router);