TUN_ASYNC
if (tp->tun_flags & TUN_ASYNC && tp->tun_pgid)
if (tp->tun_flags & TUN_ASYNC && tp->tun_pgid)
if (tp->tun_flags & TUN_ASYNC && tp->tun_pgid)
if (tp->tun_flags & TUN_ASYNC && tp->tun_pgid)
if (tp->tun_flags & TUN_ASYNC && tp->tun_pgid)
tp->tun_flags |= TUN_ASYNC;
tp->tun_flags &= ~TUN_ASYNC;