TF_ECN_SND_CWR
tp->t_flags |= TF_ECN_SND_CWR;
tp->t_flags |= TF_ECN_SND_CWR;
tp->t_flags |= TF_ECN_SND_CWR;
if (tp->t_flags & TF_ECN_SND_CWR) {
tp->t_flags &= ~TF_ECN_SND_CWR;
if ((tp->t_flags & (TF_ECN_SND_CWR|TF_ECN_SND_ECE)) != 0) {