int ofproto_port_add(struct ofproto *, struct netdev *, uint16_t *ofp_portp);
int ofproto_port_del(struct ofproto *, uint16_t ofp_port);
int ofproto_port_get_stats(const struct ofport *, struct netdev_stats *stats);
int ofproto_port_add(struct ofproto *, struct netdev *, uint16_t *ofp_portp);
int ofproto_port_del(struct ofproto *, uint16_t ofp_port);
int ofproto_port_get_stats(const struct ofport *, struct netdev_stats *stats);