bintime2ns
m->m_pkthdr.rcv_tstmp = bintime2ns(&lc->lro_last_queue_time);
mb->m_pkthdr.rcv_tstmp = bintime2ns(&lc->lro_last_queue_time);
now = bintime2ns(&bt);
if (now >= (bintime2ns(&le->alloc_time) + tov)) {