extern const char *inet6_ntoa(struct in6_addr);
extern int is_zero_mac(const struct ethaddr *mac);
+extern bool is_mcast_mac(const struct ethaddr *mac);
+extern bool is_bcast_mac(const struct ethaddr *mac);
extern int prefix_str2mac(const char *str, struct ethaddr *mac);
extern char *prefix_mac2str(const struct ethaddr *mac, char *buf, int size);