+int sd_rtnl_message_is_broadcast(sd_rtnl_message *m);
+
+int sd_rtnl_message_addr_set_prefixlen(sd_rtnl_message *m, unsigned char prefixlen);
+int sd_rtnl_message_addr_set_scope(sd_rtnl_message *m, unsigned char scope);
+int sd_rtnl_message_addr_set_flags(sd_rtnl_message *m, unsigned char flags);
+
+int sd_rtnl_message_link_set_flags(sd_rtnl_message *m, unsigned flags, unsigned change);
+int sd_rtnl_message_link_set_type(sd_rtnl_message *m, unsigned type);
+int sd_rtnl_message_link_get_ifindex(sd_rtnl_message *m, int *ifindex);
+int sd_rtnl_message_link_get_flags(sd_rtnl_message *m, unsigned *flags);
+
+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_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);
+
+int sd_rtnl_message_open_container(sd_rtnl_message *m, unsigned short type);
+int sd_rtnl_message_open_container_union(sd_rtnl_message *m, unsigned short type, const char *key);
+int sd_rtnl_message_close_container(sd_rtnl_message *m);
+
+int sd_rtnl_message_read_string(sd_rtnl_message *m, unsigned short type, char **data);
+int sd_rtnl_message_read_u8(sd_rtnl_message *m, unsigned short type, uint8_t *data);
+int sd_rtnl_message_read_u16(sd_rtnl_message *m, unsigned short type, uint16_t *data);
+int sd_rtnl_message_read_u32(sd_rtnl_message *m, unsigned short type, uint32_t *data);
+int sd_rtnl_message_read_ether_addr(sd_rtnl_message *m, unsigned short type, struct ether_addr *data);
+int sd_rtnl_message_read_cache_info(sd_rtnl_message *m, unsigned short type, struct ifa_cacheinfo *info);
+int sd_rtnl_message_read_in_addr(sd_rtnl_message *m, unsigned short type, struct in_addr *data);
+int sd_rtnl_message_read_in6_addr(sd_rtnl_message *m, unsigned short type, struct in6_addr *data);
+int sd_rtnl_message_enter_container(sd_rtnl_message *m, unsigned short type);
+int sd_rtnl_message_exit_container(sd_rtnl_message *m);
+
+int sd_rtnl_message_rewind(sd_rtnl_message *m);