+int odhcpd_bmemcmp(const void *av, const void *bv, size_t bits);
+void odhcpd_bmemcpy(void *av, const void *bv, size_t bits);
+
+int odhcpd_iterate_interface_neighbors(const struct interface *iface,
+ void(*cb_neigh)(const struct in6_addr *addr,
+ const struct interface *iface, void *data), void *data);