char *flow_to_string(const struct flow *);
void format_flags(struct ds *ds, const char *(*bit_to_string)(uint32_t),
uint32_t flags, char del);
+void format_flags_masked(struct ds *ds, const char *name,
+ const char *(*bit_to_string)(uint32_t),
+ uint32_t flags, uint32_t mask);
void flow_format(struct ds *, const struct flow *);
void flow_print(FILE *, const struct flow *);