* everything below is to deal with channels that we
* want to include but that are not explicitly listed.
*/
if (flags & IEEE80211_CHAN_HT40) {
/* NB: we use an HT40 channel center that matches HT20 */
flags = (flags &~ IEEE80211_CHAN_HT40) | IEEE80211_CHAN_HT20;
}
if (chanlookup(avail->ic_chans, avail->ic_nchans, freq, flags) != NULL)
return 1;
if (flags & IEEE80211_CHAN_GSM) {