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Commit d545daba authored by Mahesh Palivela's avatar Mahesh Palivela Committed by Johannes Berg
Browse files

mac80211: VHT (11ac) association 



Insert VHT IEs into association frames to allow
mac80211 to connect as a VHT client.

Signed-off-by: default avatarMahesh Palivela <maheshp@posedge.com>
[clarify commit message]
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent bae35d92

net/mac80211/ieee80211_i.h

+1 −0
Original line number Diff line number Diff line
@@ -359,6 +359,7 @@ enum ieee80211_sta_flags { 
	IEEE80211_STA_NULLFUNC_ACKED	= BIT(8),

	IEEE80211_STA_RESET_SIGNAL_AVE	= BIT(9),

	IEEE80211_STA_DISABLE_40MHZ	= BIT(10),

	IEEE80211_STA_DISABLE_VHT	= BIT(11),

};



struct ieee80211_mgd_auth_data {

net/mac80211/mlme.c

+38 −2
Original line number Diff line number Diff line
@@ -326,6 +326,26 @@ static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 
	ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);

}



static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,

				 struct sk_buff *skb,

				 struct ieee80211_supported_band *sband)

{

	u8 *pos;

	u32 cap;

	struct ieee80211_sta_vht_cap vht_cap;



	BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));



	memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));



	/* determine capability flags */

	cap = vht_cap.cap;



	/* reserve and fill IE */

	pos = skb_put(skb, sizeof(struct ieee80211_vht_capabilities) + 2);

	ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);

}



static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)

{

	struct ieee80211_local *local = sdata->local;
@@ -371,6 +391,7 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 
			4 + /* power capability */

			2 + 2 * sband->n_channels + /* supported channels */

			2 + sizeof(struct ieee80211_ht_cap) + /* HT */

			2 + sizeof(struct ieee80211_vht_capabilities) + /* VHT */

			assoc_data->ie_len + /* extra IEs */

			9, /* WMM */

			GFP_KERNEL);
@@ -503,6 +524,9 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 
		ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,

				    sband, local->oper_channel, ifmgd->ap_smps);



	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))

		ieee80211_add_vht_ie(sdata, skb, sband);



	/* if present, add any custom non-vendor IEs that go after HT */

	if (assoc_data->ie_len && assoc_data->ie) {

		noffset = ieee80211_ie_split_vendor(assoc_data->ie,
@@ -3301,6 +3325,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 


	ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;

	ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;

	ifmgd->flags &= ~IEEE80211_STA_DISABLE_VHT;



	ifmgd->beacon_crc_valid = false;
@@ -3316,13 +3341,16 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 
		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||

		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {

			ifmgd->flags |= IEEE80211_STA_DISABLE_11N;

			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;

			netdev_info(sdata->dev,

				    "disabling HT due to WEP/TKIP use\n");

				    "disabling HT/VHT due to WEP/TKIP use\n");

		}

	}



	if (req->flags & ASSOC_REQ_DISABLE_HT)

	if (req->flags & ASSOC_REQ_DISABLE_HT) {

		ifmgd->flags |= IEEE80211_STA_DISABLE_11N;

		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;

	}



	/* Also disable HT if we don't support it or the AP doesn't use WMM */

	sband = local->hw.wiphy->bands[req->bss->channel->band];
@@ -3333,6 +3361,14 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 
			    "disabling HT as WMM/QoS is not supported\n");

	}



	/* disable VHT if we don't support it or the AP doesn't use WMM */

	if (!sband->vht_cap.vht_supported ||

	    local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {

		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;

		netdev_info(sdata->dev,

			    "disabling VHT as WMM/QoS is not supported\n");

	}



	memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));

	memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,

	       sizeof(ifmgd->ht_capa_mask));