TF_NEEDOUTPUT
tp->t_flags & TF_NEEDOUTPUT)
if (tp->t_flags & (TF_ACKNOW|TF_NEEDOUTPUT))
tp->t_flags |= TF_NEEDOUTPUT;
tp->t_flags |= TF_NEEDOUTPUT;
if (tp->t_flags & (TF_ACKNOW|TF_NEEDOUTPUT))
tp->t_flags |= TF_NEEDOUTPUT;