cfg80211: Extend support for IEEE 802.11r Fast BSS Transition

Add NL80211_CMD_UPDATE_FT_IES to support update of FT IEs to the WLAN
driver and NL80211_CMD_FT_EVENT to send FT events from the WLAN driver.
This will carry the target AP's MAC address along with the relevant
Information Elements. This event is used to report received FT IEs
(MDIE, FTIE, RSN IE, TIE, RICIE). These changes allow FT to be supported
with drivers that use an internal SME instead of user space option (like
FT implementation in wpa_supplicant with mac80211-based drivers).

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

2 files changed, 60 insertions, 0 deletions

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 73a523901c73..dfef0d5b5d3d 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1763,6 +1763,21 @@ struct cfg80211_gtk_rekey_data {
 };
 
 /**
+ * struct cfg80211_update_ft_ies_params - FT IE Information
+ *
+ * This structure provides information needed to update the fast transition IE
+ *
+ * @md: The Mobility Domain ID, 2 Octet value
+ * @ie: Fast Transition IEs
+ * @ie_len: Length of ft_ie in octets
+ */
+struct cfg80211_update_ft_ies_params {
+        u16 md;
+        const u8 *ie;
+        size_t ie_len;
+};
+
+/**
  * struct cfg80211_ops - backend description for wireless configuration
  *
  * This struct is registered by fullmac card drivers and/or wireless stacks
@@ -2208,6 +2223,8 @@ struct cfg80211_ops {
         int     (*start_radar_detection)(struct wiphy *wiphy,
                                          struct net_device *dev,
                                          struct cfg80211_chan_def *chandef);
+        int     (*update_ft_ies)(struct wiphy *wiphy, struct net_device *dev,
+                                 struct cfg80211_update_ft_ies_params *ftie);
 };
 
 /*
@@ -4045,6 +4062,30 @@ u32 cfg80211_calculate_bitrate(struct rate_info *rate);
 void cfg80211_unregister_wdev(struct wireless_dev *wdev);
 
 /**
+ * struct cfg80211_ft_event - FT Information Elements
+ * @ies: FT IEs
+ * @ies_len: length of the FT IE in bytes
+ * @target_ap: target AP's MAC address
+ * @ric_ies: RIC IE
+ * @ric_ies_len: length of the RIC IE in bytes
+ */
+struct cfg80211_ft_event_params {
+        const u8 *ies;
+        size_t ies_len;
+        const u8 *target_ap;
+        const u8 *ric_ies;
+        size_t ric_ies_len;
+};
+
+/**
+ * cfg80211_ft_event - notify userspace about FT IE and RIC IE
+ * @netdev: network device
+ * @ft_event: IE information
+ */
+void cfg80211_ft_event(struct net_device *netdev,
+                       struct cfg80211_ft_event_params *ft_event);
+
+/**
  * cfg80211_get_p2p_attr - find and copy a P2P attribute from IE buffer
  * @ies: the input IE buffer
  * @len: the input length
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 2c3e88360037..2d0cff57ff89 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -629,6 +629,14 @@
  *      i.e. features for the nl80211 protocol rather than device features.
  *      Returns the features in the %NL80211_ATTR_PROTOCOL_FEATURES bitmap.
  *
+ * @NL80211_CMD_UPDATE_FT_IES: Pass down the most up-to-date Fast Transition
+ *      Information Element to the WLAN driver
+ *
+ * @NL80211_CMD_FT_EVENT: Send a Fast transition event from the WLAN driver
+ *      to the supplicant. This will carry the target AP's MAC address along
+ *      with the relevant Information Elements. This event is used to report
+ *      received FT IEs (MDIE, FTIE, RSN IE, TIE, RICIE).
+ *
  * @NL80211_CMD_MAX: highest used command number
  * @__NL80211_CMD_AFTER_LAST: internal use
  */
@@ -785,6 +793,9 @@ enum nl80211_commands {
 
         NL80211_CMD_GET_PROTOCOL_FEATURES,
 
+        NL80211_CMD_UPDATE_FT_IES,
+        NL80211_CMD_FT_EVENT,
+
         /* add new commands above here */
 
         /* used to define NL80211_CMD_MAX below */
@@ -1396,6 +1407,11 @@ enum nl80211_commands {
  *      receiving the data for a single wiphy split across multiple
  *      messages, given with wiphy dump message
  *
+ * @NL80211_ATTR_MDID: Mobility Domain Identifier
+ *
+ * @NL80211_ATTR_IE_RIC: Resource Information Container Information
+ *      Element
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -1688,6 +1704,9 @@ enum nl80211_attrs {
         NL80211_ATTR_DISABLE_VHT,
         NL80211_ATTR_VHT_CAPABILITY_MASK,
 
+        NL80211_ATTR_MDID,
+        NL80211_ATTR_IE_RIC,
+
         /* add attributes here, update the policy in nl80211.c */
 
         __NL80211_ATTR_AFTER_LAST,