IEEE80211_FEXT_TSN
if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) &&
ireq->i_val = (vap->iv_flags_ext & IEEE80211_FEXT_TSN) != 0;
vap->iv_flags_ext |= IEEE80211_FEXT_TSN;
vap->iv_flags_ext &= ~IEEE80211_FEXT_TSN;