cfg80211: Add local-state-change-only auth/deauth/disassoc

cfg80211 is quite strict on allowing authentication and association
commands only in certain states. In order to meet these requirements,
user space applications may need to clear authentication or
association state in some cases. Currently, this can be done with
deauth/disassoc command, but that ends up sending out Deauthentication
or Disassociation frame unnecessarily. Add a new nl80211 attribute to
allow this sending of the frame be skipped, but with all other
deauth/disassoc operations being completed.

Similar state change is also needed for IEEE 802.11r FT protocol in
the FT-over-DS case which does not use Authentication frame exchange
in a transition to another BSS. For this to work with cfg80211, an
authentication entry needs to be created for the target BSS without
sending out an Authentication frame. The nl80211 authentication
command can be used for this purpose, too, with the new attribute to
indicate that the command is only for changing local state. This
enables wpa_supplicant to complete FT-over-DS transition successfully.

Signed-off-by: Jouni Malinen <j@w1.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 10 insertions, 5 deletions

diff --git a/net/wireless/core.h b/net/wireless/core.h
index d52da913145a..b2234b436ead 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -293,13 +293,15 @@ int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
                          const u8 *bssid,
                          const u8 *ssid, int ssid_len,
                          const u8 *ie, int ie_len,
-                         const u8 *key, int key_len, int key_idx);
+                         const u8 *key, int key_len, int key_idx,
+                         bool local_state_change);
 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
                        struct net_device *dev, struct ieee80211_channel *chan,
                        enum nl80211_auth_type auth_type, const u8 *bssid,
                        const u8 *ssid, int ssid_len,
                        const u8 *ie, int ie_len,
-                       const u8 *key, int key_len, int key_idx);
+                       const u8 *key, int key_len, int key_idx,
+                       bool local_state_change);
 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
                           struct net_device *dev,
                           struct ieee80211_channel *chan,
@@ -315,13 +317,16 @@ int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
                         struct cfg80211_crypto_settings *crypt);
 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
                            struct net_device *dev, const u8 *bssid,
-                           const u8 *ie, int ie_len, u16 reason);
+                           const u8 *ie, int ie_len, u16 reason,
+                           bool local_state_change);
 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
                          struct net_device *dev, const u8 *bssid,
-                         const u8 *ie, int ie_len, u16 reason);
+                         const u8 *ie, int ie_len, u16 reason,
+                         bool local_state_change);
 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
                            struct net_device *dev, const u8 *bssid,
-                           const u8 *ie, int ie_len, u16 reason);
+                           const u8 *ie, int ie_len, u16 reason,
+                           bool local_state_change);
 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
                         struct net_device *dev);
 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,