mac80211: 802.11w - Add driver capability flag for MFP

This allows user space to determine whether a driver supports MFP and
behave properly without having to ask user to configure this in
MFP-optional mode.

Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 00a50a3..9bca2ab 100644 (file)
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -865,6 +865,9 @@ enum ieee80211_tkip_key_type {
  *
  * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS:
  *     Hardware has support for dynamic PS.
+ *
+ * @IEEE80211_HW_MFP_CAPABLE:
+ *     Hardware supports management frame protection (MFP, IEEE 802.11w).
  */
 enum ieee80211_hw_flags {
        IEEE80211_HW_RX_INCLUDES_FCS                    = 1<<1,
@@ -880,6 +883,7 @@ enum ieee80211_hw_flags {
        IEEE80211_HW_SUPPORTS_PS                        = 1<<11,
        IEEE80211_HW_PS_NULLFUNC_STACK                  = 1<<12,
        IEEE80211_HW_SUPPORTS_DYNAMIC_PS                = 1<<13,
+       IEEE80211_HW_MFP_CAPABLE                        = 1<<14,
 };
 
 /**

diff --git a/net/mac80211/wext.c b/net/mac80211/wext.c
index 2dd3874..70a29b6 100644 (file)
--- a/net/mac80211/wext.c
+++ b/net/mac80211/wext.c
@@ -976,6 +976,10 @@ static int ieee80211_ioctl_siwauth(struct net_device *dev,
                        ret = -EOPNOTSUPP;
                break;
        case IW_AUTH_MFP:
+               if (!(sdata->local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) {
+                       ret = -EOPNOTSUPP;
+                       break;
+               }
                if (sdata->vif.type == NL80211_IFTYPE_STATION ||
                    sdata->vif.type == NL80211_IFTYPE_ADHOC)
                        sdata->u.sta.mfp = data->value;