IN6_V4ADDR_TO_6TO4
IN6_V4ADDR_TO_6TO4(¤t_addr, &v6_rt);
IN6_V4ADDR_TO_6TO4(&new_addr, &v6_rt);
IN6_V4ADDR_TO_6TO4(&rr_addr, &v6_rt);
IN6_V4ADDR_TO_6TO4(&v4phys, &ipif->ipif_v6lcl_addr);