int sd_rtnl_message_route_set_dst_prefixlen(sd_rtnl_message *m, unsigned char prefixlen);
int sd_rtnl_message_route_set_scope(sd_rtnl_message *m, unsigned char scope);
int sd_rtnl_message_route_get_family(sd_rtnl_message *m, int *family);
+int sd_rtnl_message_route_get_dst_len(sd_rtnl_message *m, unsigned char *dst_len);
int sd_rtnl_message_neigh_get_family(sd_rtnl_message *m, int *family);
int sd_rtnl_message_neigh_get_ifindex(sd_rtnl_message *m, int *family);