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>

3 files changed, 13 insertions, 6 deletions

diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index fb1e72179117..f5a7ac3a0939 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -814,8 +814,8 @@ int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
                                   cookie);
 }
 
-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_mbm,
+                      const u8 *buf, size_t len, gfp_t gfp)
 {
         struct wireless_dev *wdev = dev->ieee80211_ptr;
         struct wiphy *wiphy = wdev->wiphy;
@@ -854,7 +854,8 @@ bool cfg80211_rx_mgmt(struct net_device *dev, int freq, const u8 *buf,
                 /* found match! */
 
                 /* Indicate the received Action frame to user space */
-                if (nl80211_send_mgmt(rdev, dev, reg->nlpid, freq,
+                if (nl80211_send_mgmt(rdev, dev, reg->nlpid,
+                                      freq, sig_mbm,
                                       buf, len, gfp))
                         continue;
 
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 4b6afc338aac..39dbdf2adb12 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -7686,7 +7686,8 @@ bool nl80211_unexpected_4addr_frame(struct net_device *dev,
 
 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
                       struct net_device *netdev, u32 nlpid,
-                      int freq, const u8 *buf, size_t len, gfp_t gfp)
+                      int freq, int sig_dbm,
+                      const u8 *buf, size_t len, gfp_t gfp)
 {
         struct sk_buff *msg;
         void *hdr;
@@ -7704,6 +7705,8 @@ int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
+        if (sig_dbm)
+                NLA_PUT_U32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm);
         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
 
         genlmsg_end(msg, hdr);
@@ -7965,7 +7968,7 @@ EXPORT_SYMBOL(cfg80211_probe_status);
 
 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)
 {
         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
         struct sk_buff *msg;
@@ -7988,6 +7991,8 @@ void cfg80211_report_obss_beacon(struct wiphy *wiphy,
         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
         if (freq)
                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
+        if (sig_dbm)
+                NLA_PUT_U32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm);
         NLA_PUT(msg, NL80211_ATTR_FRAME, len, frame);
 
         genlmsg_end(msg, hdr);
diff --git a/net/wireless/nl80211.h b/net/wireless/nl80211.h
index 12bf4d185abe..4ffe50df9f31 100644
--- a/net/wireless/nl80211.h
+++ b/net/wireless/nl80211.h
@@ -92,7 +92,8 @@ void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
                                 gfp_t gfp);
 
 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
-                      struct net_device *netdev, u32 nlpid, int freq,
+                      struct net_device *netdev, u32 nlpid,
+                      int freq, int sig_dbm,
                       const u8 *buf, size_t len, gfp_t gfp);
 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
                                  struct net_device *netdev, u64 cookie,