RT_LINK_IS_UP
#define NH_IS_VALID(_nh) RT_LINK_IS_UP((_nh)->nh_ifp)
if (RT_LINK_IS_UP(nh->nh_ifp)) {
if (RT_LINK_IS_UP(nh->nh_ifp)) {
if (RT_LINK_IS_UP(nh->nh_ifp))
if (RT_LINK_IS_UP(nh->nh_ifp)) {
if (RT_LINK_IS_UP(nh->nh_ifp)) {
if (RT_LINK_IS_UP(nh->nh_ifp))