+int sd_rtnl_message_route_set_src_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_prefixlen(sd_rtnl_message *m, unsigned char *dst_len);
+int sd_rtnl_message_route_get_src_prefixlen(sd_rtnl_message *m, unsigned char *src_len);
+
+int sd_rtnl_message_neigh_set_flags(sd_rtnl_message *m, uint8_t flags);
+int sd_rtnl_message_neigh_set_state(sd_rtnl_message *m, uint16_t state);
+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);
+int sd_rtnl_message_neigh_get_state(sd_rtnl_message *m, uint16_t *state);
+int sd_rtnl_message_neigh_get_flags(sd_rtnl_message *m, uint8_t *flags);
+
+int sd_rtnl_message_append_string(sd_rtnl_message *m, unsigned short type, const char *data);
+int sd_rtnl_message_append_u8(sd_rtnl_message *m, unsigned short type, uint8_t data);
+int sd_rtnl_message_append_u16(sd_rtnl_message *m, unsigned short type, uint16_t data);
+int sd_rtnl_message_append_u32(sd_rtnl_message *m, unsigned short type, uint32_t data);
+int sd_rtnl_message_append_in_addr(sd_rtnl_message *m, unsigned short type, const struct in_addr *data);
+int sd_rtnl_message_append_in6_addr(sd_rtnl_message *m, unsigned short type, const struct in6_addr *data);
+int sd_rtnl_message_append_ether_addr(sd_rtnl_message *m, unsigned short type, const struct ether_addr *data);
+int sd_rtnl_message_append_cache_info(sd_rtnl_message *m, unsigned short type, const struct ifa_cacheinfo *info);