IPH_DF
{ "DF", IPH_DF, IPH_DF },
ipha->ipha_fragment_offset_and_flags &= htons(IPH_DF);
if (ipha->ipha_fragment_offset_and_flags & htons(IPH_DF))
frag_flag = ntohs(ipha->ipha_fragment_offset_and_flags) & IPH_DF;
htons(IPH_DF);
iph->ipha_fragment_offset_and_flags = htons(IPH_DF);
htons(IPH_DF);