IPVL_IPV4
*type = IPVL_IPV4;
case IPVL_IPV4: {
if (!is_v6 && addr->atype == IPVL_IPV4) {
if (addr->atype == IPVL_IPV4 && addr->ip4addr.s_addr == addr4)
addr->atype = IPVL_IPV4;