cfg80211/mac80211: report signal strength for mgmt frames

Add the signal strength (in dBm only for now) to
frames that are received via nl80211's various
frame APIs.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Kalle Valo <kvalo@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 11 insertions, 3 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 9f46c62b1eee..c37d67add090 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -1203,6 +1203,10 @@ enum nl80211_commands {
  *      the list. This needs to be used when the driver advertises the
  *      capability to timeout the stations.
  *
+ * @NL80211_ATTR_RX_SIGNAL_DBM: signal strength in dBm (as a 32-bit int);
+ *      this attribute is (depending on the driver capabilities) added to
+ *      received frames indicated with %NL80211_CMD_FRAME.
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -1450,6 +1454,8 @@ enum nl80211_attrs {
 
         NL80211_ATTR_INACTIVITY_TIMEOUT,
 
+        NL80211_ATTR_RX_SIGNAL_DBM,
+
         /* add attributes here, update the policy in nl80211.c */
 
         __NL80211_ATTR_AFTER_LAST,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 804805827736..4682c35a92c4 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -3189,6 +3189,7 @@ void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp);
  * cfg80211_rx_mgmt - notification of received, unprocessed management frame
  * @dev: network device
  * @freq: Frequency on which the frame was received in MHz
+ * @sig_dbm: signal strength in mBm, or 0 if unknown
  * @buf: Management frame (header + body)
  * @len: length of the frame data
  * @gfp: context flags
@@ -3201,8 +3202,8 @@ void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp);
  * This function is called whenever an Action frame is received for a station
  * mode interface, but is not processed in kernel.
  */
-bool cfg80211_rx_mgmt(struct net_device *dev, int freq, const u8 *buf,
-                      size_t len, gfp_t gfp);
+bool cfg80211_rx_mgmt(struct net_device *dev, int freq, int sig_dbm,
+                      const u8 *buf, size_t len, gfp_t gfp);
 
 /**
  * cfg80211_mgmt_tx_status - notification of TX status for management frame
@@ -3315,6 +3316,7 @@ void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
  * @frame: the frame
  * @len: length of the frame
  * @freq: frequency the frame was received on
+ * @sig_dbm: signal strength in mBm, or 0 if unknown
  * @gfp: allocation flags
  *
  * Use this function to report to userspace when a beacon was
@@ -3323,7 +3325,7 @@ void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
  */
 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
                                  const u8 *frame, size_t len,
-                                 int freq, gfp_t gfp);
+                                 int freq, int sig_dbm, gfp_t gfp);
 
 /*
  * cfg80211_can_beacon_sec_chan - test if ht40 on extension channel can be used