int sd_rtnl_message_route_set_dst_prefixlen(sd_rtnl_message *m, unsigned char prefixlen);
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_close_container(sd_rtnl_message *m);
int sd_rtnl_message_read(sd_rtnl_message *m, unsigned short *type, void **data);
+int sd_rtnl_message_exit_container(sd_rtnl_message *m);
int sd_rtnl_message_rewind(sd_rtnl_message *m);