mac80211: VHT (11ac) association
Insert VHT IEs into association frames to allow
mac80211 to connect as a VHT client.
Change-Id: Ifc54bdbe49be3d8b499a764107b30cf3136adf9f
CRs-fixed: 452921
Signed-off-by: Mahesh Palivela <maheshp@posedge.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 1f13892..a99a715 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -378,6 +378,7 @@
IEEE80211_STA_UAPSD_ENABLED = BIT(7),
IEEE80211_STA_NULLFUNC_ACKED = BIT(8),
IEEE80211_STA_RESET_SIGNAL_AVE = BIT(9),
+ IEEE80211_STA_DISABLE_VHT = BIT(11),
};
struct ieee80211_mgd_auth_data {
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 20c680b..b12b2b6 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -383,6 +383,26 @@
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;
@@ -428,6 +448,7 @@
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);
@@ -560,6 +581,9 @@
ieee80211_add_ht_ie(sdata, skb, assoc_data->ht_information_ie,
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,
@@ -3289,6 +3313,7 @@
ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
+ ifmgd->flags &= ~IEEE80211_STA_DISABLE_VHT;
ifmgd->beacon_crc_valid = false;
@@ -3299,14 +3324,21 @@
* We can set this to true for non-11n hardware, that'll be checked
* separately along with the peer capabilities.
*/
- for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
+ for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
- req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
+ 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/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];
@@ -3314,6 +3346,14 @@
local->hw.queues < 4 || !bss->wmm_used)
ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
+ /* 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));