#define OFPROTO_FLOW_EVICTION_THRESHOLD_DEFAULT 1000
#define OFPROTO_FLOW_EVICTION_THRESHOLD_MIN 100
+const char *ofproto_port_open_type(const char *datapath_type,
+ const char *port_type);
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);