rti_gateway
rtinfo.rti_gateway = rt->rt_gateway;
rtinfo.rti_gateway = ifma->ifma_lladdr;
rtinfo->rti_gateway = rt->rt_gateway;
rtinfo->rti_gateway = rt->rt_gateway;
(rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX))
if (rtinfo.rti_gateway == NULL) {
if (((rt->rt_flags & RTF_GATEWAY) && rtinfo->rti_gateway != NULL) ||
if (rtinfo->rti_gateway != NULL) {
error = rt_setgate(rt, rt_key(rt), rtinfo->rti_gateway);