int netdev_get_next_hop(const struct netdev *, const struct in_addr *host,
struct in_addr *next_hop, char **);
int netdev_get_status(const struct netdev *, struct shash *sh);
int netdev_get_next_hop(const struct netdev *, const struct in_addr *host,
struct in_addr *next_hop, char **);
int netdev_get_status(const struct netdev *, struct shash *sh);
int netdev_get_flags(const struct netdev *, enum netdev_flags *);
int netdev_set_flags(struct netdev *, enum netdev_flags, bool permanent);
int netdev_get_flags(const struct netdev *, enum netdev_flags *);
int netdev_set_flags(struct netdev *, enum netdev_flags, bool permanent);