Symbol: VTNET_FLAG_TSO_ECN
sys/dev/virtual/virtio/net/if_vtnet.c
1974
if ((sc->vtnet_flags & VTNET_FLAG_TSO_ECN) == 0) {
sys/dev/virtual/virtio/net/if_vtnet.c
810
sc->vtnet_flags |= VTNET_FLAG_TSO_ECN;