mac80211: 802.11w - STA flag for MFP

Add flags for setting STA entries and struct ieee80211_if_sta to
indicate whether management frame protection (MFP) is used.

Signed-off-by: Jouni Malinen <j@w1.fi>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

5 files changed, 15 insertions, 4 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 9d4e4d846ec1..309d9189aa49 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -630,6 +630,10 @@ static void sta_apply_parameters(struct ieee80211_local *local,
                 sta->flags &= ~WLAN_STA_WME;
                 if (params->station_flags & STATION_FLAG_WME)
                         sta->flags |= WLAN_STA_WME;
+
+                sta->flags &= ~WLAN_STA_MFP;
+                if (params->station_flags & STATION_FLAG_MFP)
+                        sta->flags |= WLAN_STA_MFP;
                 spin_unlock_bh(&sta->lock);
         }
 
diff --git a/net/mac80211/debugfs_sta.c b/net/mac80211/debugfs_sta.c
index a2fbe0131312..90230c718b5b 100644
--- a/net/mac80211/debugfs_sta.c
+++ b/net/mac80211/debugfs_sta.c
@@ -67,14 +67,15 @@ static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
         char buf[100];
         struct sta_info *sta = file->private_data;
         u32 staflags = get_sta_flags(sta);
-        int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s",
+        int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s",
                 staflags & WLAN_STA_AUTH ? "AUTH\n" : "",
                 staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "",
                 staflags & WLAN_STA_PS ? "PS\n" : "",
                 staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "",
                 staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "",
                 staflags & WLAN_STA_WME ? "WME\n" : "",
-                staflags & WLAN_STA_WDS ? "WDS\n" : "");
+                staflags & WLAN_STA_WDS ? "WDS\n" : "",
+                staflags & WLAN_STA_MFP ? "MFP\n" : "");
         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 }
 STA_OPS(flags);
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 3db6bc3cdaf2..b5f86cb17630 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -260,6 +260,7 @@ struct mesh_preq_queue {
 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 #define IEEE80211_STA_TKIP_WEP_USED     BIT(14)
 #define IEEE80211_STA_CSA_RECEIVED      BIT(15)
+#define IEEE80211_STA_MFP_ENABLED       BIT(16)
 /* flags for MLME request */
 #define IEEE80211_STA_REQ_SCAN 0
 #define IEEE80211_STA_REQ_DIRECT_PROBE 1
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index a1e683e305f0..bc8a7f1a6a15 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1,6 +1,6 @@
 /*
  * BSS client mode implementation
- * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
+ * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
  * Copyright 2004, Instant802 Networks, Inc.
  * Copyright 2005, Devicescape Software, Inc.
  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
@@ -472,7 +472,7 @@ static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
         /* u.deauth.reason_code == u.disassoc.reason_code */
         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
 
-        ieee80211_tx_skb(sdata, skb, 0);
+        ieee80211_tx_skb(sdata, skb, ifsta->flags & IEEE80211_STA_MFP_ENABLED);
 }
 
 /* MLME */
@@ -1408,6 +1408,9 @@ static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
 
         rate_control_rate_init(sta);
 
+        if (ifsta->flags & IEEE80211_STA_MFP_ENABLED)
+                set_sta_flags(sta, WLAN_STA_MFP);
+
         if (elems.wmm_param)
                 set_sta_flags(sta, WLAN_STA_WME);
 
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index b683d3f5ef8a..d13a44b935e2 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -34,6 +34,7 @@
  * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
  *      IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
  *      frame to this station is transmitted.
+ * @WLAN_STA_MFP: Management frame protection is used with this STA.
  */
 enum ieee80211_sta_info_flags {
         WLAN_STA_AUTH           = 1<<0,
@@ -46,6 +47,7 @@ enum ieee80211_sta_info_flags {
         WLAN_STA_WDS            = 1<<7,
         WLAN_STA_PSPOLL         = 1<<8,
         WLAN_STA_CLEAR_PS_FILT  = 1<<9,
+        WLAN_STA_MFP            = 1<<10,
 };
 
 #define STA_TID_NUM 16