Commit 890b7878 authored by Arik Nemtsov's avatar Arik Nemtsov Committed by Johannes Berg
Browse files

mac80211: TDLS: use the BSS chandef for HT/VHT operation IEs 



The chandef of the current channel context might be wider (though
compatible). The TDLS link cares only about the channel of the BSS.

In addition make sure to specify the VHT operation IE when VHT is supported
on a non-2.4GHz band, as required by IEEE802.11ac-2013. This is not the
same as HT-operation, to be specified only if the BSS doesn't support HT.

Signed-off-by: default avatarArik Nemtsov <arikx.nemtsov@intel.com>
Reviewed-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 96a4688e

net/mac80211/tdls.c

+8 −19
Original line number Diff line number Diff line
@@ -527,30 +527,19 @@ ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata, 


	/* if HT support is only added in TDLS, we need an HT-operation IE */

	if (!ap_sta->sta.ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) {

		struct ieee80211_chanctx_conf *chanctx_conf =

				rcu_dereference(sdata->vif.chanctx_conf);

		if (!WARN_ON(!chanctx_conf)) {

			pos = skb_put(skb, 2 +

				      sizeof(struct ieee80211_ht_operation));

		pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));

		/* send an empty HT operation IE */

		ieee80211_ie_build_ht_oper(pos, &sta->sta.ht_cap,

						   &chanctx_conf->def, 0);

		}

					   &sdata->vif.bss_conf.chandef, 0);

	}



	ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);



	/* only include VHT-operation if not on the 2.4GHz band */

	if (band != IEEE80211_BAND_2GHZ && !ap_sta->sta.vht_cap.vht_supported &&

	    sta->sta.vht_cap.vht_supported) {

		struct ieee80211_chanctx_conf *chanctx_conf =

				rcu_dereference(sdata->vif.chanctx_conf);

		if (!WARN_ON(!chanctx_conf)) {

			pos = skb_put(skb, 2 +

				      sizeof(struct ieee80211_vht_operation));

	if (band != IEEE80211_BAND_2GHZ && sta->sta.vht_cap.vht_supported) {

		pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));

		ieee80211_ie_build_vht_oper(pos, &sta->sta.vht_cap,

						    &chanctx_conf->def);

		}

					    &sdata->vif.bss_conf.chandef);

	}



	rcu_read_unlock();

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