struct flow *);
void flow_extract_stats(const struct flow *flow, struct ofpbuf *packet,
struct dpif_flow_stats *);
+void flow_zero_wildcards(struct flow *, const struct flow_wildcards *);
+
char *flow_to_string(const struct flow *);
void flow_format(struct ds *, const struct flow *);
void flow_print(FILE *, const struct flow *);