int netdev_get_features(struct netdev *,
uint32_t *current, uint32_t *advertised,
uint32_t *supported, uint32_t *peer);
+uint64_t netdev_features_to_bps(uint32_t features);
+bool netdev_features_is_full_duplex(uint32_t features);
int netdev_set_advertisements(struct netdev *, uint32_t advertise);
int netdev_get_in4(const struct netdev *, struct in_addr *address,