BGE_CSUM_FEATURES
ifp->if_hwassist |= BGE_CSUM_FEATURES;
} else if (m_head->m_pkthdr.csum_flags & BGE_CSUM_FEATURES) {
ifp->if_hwassist |= BGE_CSUM_FEATURES;
ifp->if_hwassist &= ~BGE_CSUM_FEATURES;