TUN_IFHEAD
if (sc->tun_flags & TUN_IFHEAD) {
sc->tun_flags &= ~TUN_IFHEAD;
sc->tun_flags |= TUN_IFHEAD;
sc->tun_flags &= ~TUN_IFHEAD;
*(int *)data = (sc->tun_flags & TUN_IFHEAD) ? 1 : 0;
if (sc->tun_flags & TUN_IFHEAD)
if (sc->tun_flags & TUN_IFHEAD) {
if (sc->tun_flags & TUN_IFHEAD) {