IEEE80211_BEACON_MISS_THRES
ic->ic_bmissthres = IEEE80211_BEACON_MISS_THRES;
int btimeout = MIN(IEEE80211_BEACON_MISS_THRES * ic->ic_bss->ni_intval,
IEEE80211_BEACON_MISS_THRES * (IEEE80211_DUR_TU / 10));