Function ieee80211_node_set_chan

freebsd/net80211/ieee80211_node.c:283–318

* Set/change the channel. The rate set is also updated as * to insure a consistent view by drivers. * XXX should be private but hostap needs it to deal with CSA */

 * XXX should be private but hostap needs it to deal with CSA
 */
void
ieee80211_node_set_chan(struct ieee80211_node *ni,
	struct ieee80211_channel *chan)
{
	struct ieee80211com *ic = ni->ni_ic;
	struct ieee80211vap *vap = ni->ni_vap;
	enum ieee80211_phymode mode;

	KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel"));

	ni->ni_chan = chan;
	mode = ieee80211_chan2mode(chan);
	if (IEEE80211_IS_CHAN_HT(chan)) {
		/*
		 * We must install the legacy rate est in ni_rates and the
		 * HT rate set in ni_htrates.
		 */
		ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan);
		/*
		 * Setup bss tx parameters based on operating mode.  We
		 * use legacy rates when operating in a mixed HT+non-HT bss
		 * and non-ERP rates in 11g for mixed ERP+non-ERP bss.
		 */
		if (mode == IEEE80211_MODE_11NA &&
		    (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
			mode = IEEE80211_MODE_11A;
		else if (mode == IEEE80211_MODE_11NG &&
		    (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0)
			mode = IEEE80211_MODE_11G;
		if (mode == IEEE80211_MODE_11G &&
		    (vap->iv_flags & IEEE80211_F_PUREG) == 0)
			mode = IEEE80211_MODE_11B;
	}
	ni->ni_txparms = &vap->iv_txparms[mode];
	ni->ni_rates = *ieee80211_get_suprates(ic, chan);
}

static __inline void
copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)