XT_IPVS_IPVS_PROPERTY
XT_IPVS_ONCE_MASK = XT_IPVS_MASK & ~XT_IPVS_IPVS_PROPERTY
if (data->bitmask == XT_IPVS_IPVS_PROPERTY) {
!!(data->invert & XT_IPVS_IPVS_PROPERTY);