int flow_extract(struct sk_buff *, uint16_t in_port, struct sw_flow_key *);
void flow_extract_match(struct sw_flow_key* to, const struct ofp_match* from);
void flow_fill_match(struct ofp_match* to, const struct sw_flow_key* from);
int flow_extract(struct sk_buff *, uint16_t in_port, struct sw_flow_key *);
void flow_extract_match(struct sw_flow_key* to, const struct ofp_match* from);
void flow_fill_match(struct ofp_match* to, const struct sw_flow_key* from);