cfg80211: Add an attribute to set inactivity timeout in AP mode

This patch adds an attribute, NL80211_ATTR_INACTIVITY_TIMEOUT,
to set the inactivity timeout which can be used to remove the
station in AP mode. This can be passed in NL80211_CMD_START_AP
and used by the drivers which have AP MLME in firmware but
don't support get_station() properly. To disable inactivity
timer in userspace, wpa_s for example, there is a new flag,
NL80211_FEATURE_INACTIVITY_TIMER, in nl80211_feature_flags
through which drivers can register their capability to use
the inactivity timeout to free the stations.

Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 13 insertions, 2 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 38fda5ee57f5..9f46c62b1eee 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -168,8 +168,8 @@
  *      %NL80211_ATTR_DTIM_PERIOD, %NL80211_ATTR_SSID,
  *      %NL80211_ATTR_HIDDEN_SSID, %NL80211_ATTR_CIPHERS_PAIRWISE,
  *      %NL80211_ATTR_CIPHER_GROUP, %NL80211_ATTR_WPA_VERSIONS,
- *      %NL80211_ATTR_AKM_SUITES, %NL80211_ATTR_PRIVACY and
- *      %NL80211_ATTR_AUTH_TYPE.
+ *      %NL80211_ATTR_AKM_SUITES, %NL80211_ATTR_PRIVACY,
+ *      %NL80211_ATTR_AUTH_TYPE and %NL80211_ATTR_INACTIVITY_TIMEOUT.
  * @NL80211_CMD_NEW_BEACON: old alias for %NL80211_CMD_START_AP
  * @NL80211_CMD_STOP_AP: Stop AP operation on the given interface
  * @NL80211_CMD_DEL_BEACON: old alias for %NL80211_CMD_STOP_AP
@@ -1197,6 +1197,12 @@ enum nl80211_commands {
  * @NL80211_ATTR_NOACK_MAP: This u16 bitmap contains the No Ack Policy of
  *      up to 16 TIDs.
  *
+ * @NL80211_ATTR_INACTIVITY_TIMEOUT: timeout value in seconds, this can be
+ *      used by the drivers which has MLME in firmware and does not have support
+ *      to report per station tx/rx activity to free up the staion entry from
+ *      the list. This needs to be used when the driver advertises the
+ *      capability to timeout the stations.
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -1442,6 +1448,8 @@ enum nl80211_attrs {
 
         NL80211_ATTR_NOACK_MAP,
 
+        NL80211_ATTR_INACTIVITY_TIMEOUT,
+
         /* add attributes here, update the policy in nl80211.c */
 
         __NL80211_ATTR_AFTER_LAST,
@@ -2809,10 +2817,13 @@ enum nl80211_ap_sme_features {
  *      TX status to the socket error queue when requested with the
  *      socket option.
  * @NL80211_FEATURE_HT_IBSS: This driver supports IBSS with HT datarates.
+ * @NL80211_FEATURE_INACTIVITY_TIMER: This driver takes care of freeing up
+ *      the connected inactive stations in AP mode.
  */
 enum nl80211_feature_flags {
         NL80211_FEATURE_SK_TX_STATUS    = 1 << 0,
         NL80211_FEATURE_HT_IBSS         = 1 << 1,
+        NL80211_FEATURE_INACTIVITY_TIMER = 1 << 2,
 };
 
 /**