tdb_ibytes
scnt->sadb_x_counter_ibytes = counters[tdb_ibytes];
tdbstat_add(tdb, tdb_ibytes, ibytes);
tdbstat_add(tdb, tdb_ibytes, plen);
tdbstat_add(tdb, tdb_ibytes, ibytes);
tdbstat_pkt(tdbp, tdb_ipackets, tdb_ibytes, m->m_pkthdr.len);