[PATCH v3 3/3] cfg80211: enable country IE support to all cfg80211 drivers

[PATCH v3 3/3] cfg80211: enable country IE support to all cfg80211 drivers

[Luis R. Rodriguez]

Since the bss is always set now once we are connected, if the
bss has its own information element we refer to it and pass that
instead of relying on mac80211's parsing.

Now all cfg80211 drivers get country IE support, automatically.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
---

Fixes comment for ieee80211_bss_get_ie() usage.

 include/net/cfg80211.h |   14 --------------
 net/mac80211/mlme.c    |    6 +-----
 net/wireless/reg.c     |    1 -
 net/wireless/reg.h     |   15 +++++++++++++++
 net/wireless/sme.c     |   16 ++++++++++++++++
 5 files changed, 32 insertions(+), 20 deletions(-)

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index e1b9235..fa72997 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1514,20 +1514,6 @@ unsigned int cfg80211_classify8021d(struct sk_buff *skb);
 extern int regulatory_hint(struct wiphy *wiphy, const char *alpha2);
 
 /**
- * regulatory_hint_11d - hints a country IE as a regulatory domain
- * @wiphy: the wireless device giving the hint (used only for reporting
- *	conflicts)
- * @country_ie: pointer to the country IE
- * @country_ie_len: length of the country IE
- *
- * We will intersect the rd with the what CRDA tells us should apply
- * for the alpha2 this country IE belongs to, this prevents APs from
- * sending us incorrect or outdated information against a country.
- */
-extern void regulatory_hint_11d(struct wiphy *wiphy,
-				u8 *country_ie,
-				u8 country_ie_len);
-/**
  * wiphy_apply_custom_regulatory - apply a custom driver regulatory domain
  * @wiphy: the wireless device we want to process the regulatory domain on
  * @regd: the custom regulatory domain to use for this wiphy
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 0779ba1..5ff1496 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1846,12 +1846,8 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
 					       bssid, ap_ht_cap_flags);
 	}
 
+	/* Note: country IE parsing is done for us by cfg80211 */
 	if (elems.country_elem) {
-		/* Note we are only reviewing this on beacons
-		 * for the BSSID we are associated to */
-		regulatory_hint_11d(local->hw.wiphy,
-			elems.country_elem, elems.country_elem_len);
-
 		/* TODO: IBSS also needs this */
 		if (elems.pwr_constr_elem)
 			ieee80211_handle_pwr_constr(sdata,
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 14e0c87..06abd7a 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -1911,7 +1911,6 @@ free_rd_out:
 out:
 	mutex_unlock(&reg_mutex);
 }
-EXPORT_SYMBOL(regulatory_hint_11d);
 
 static bool freq_is_chan_12_13_14(u16 freq)
 {
diff --git a/net/wireless/reg.h b/net/wireless/reg.h
index e37829a..662a9da 100644
--- a/net/wireless/reg.h
+++ b/net/wireless/reg.h
@@ -36,4 +36,19 @@ int regulatory_hint_found_beacon(struct wiphy *wiphy,
 					struct ieee80211_channel *beacon_chan,
 					gfp_t gfp);
 
+/**
+ * regulatory_hint_11d - hints a country IE as a regulatory domain
+ * @wiphy: the wireless device giving the hint (used only for reporting
+ *	conflicts)
+ * @country_ie: pointer to the country IE
+ * @country_ie_len: length of the country IE
+ *
+ * We will intersect the rd with the what CRDA tells us should apply
+ * for the alpha2 this country IE belongs to, this prevents APs from
+ * sending us incorrect or outdated information against a country.
+ */
+void regulatory_hint_11d(struct wiphy *wiphy,
+			 u8 *country_ie,
+			 u8 country_ie_len);
+
 #endif  /* __NET_WIRELESS_REG_H */
diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index 3728d2b..bc0fb7d 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -13,6 +13,7 @@
 #include <net/cfg80211.h>
 #include <net/rtnetlink.h>
 #include "nl80211.h"
+#include "reg.h"
 
 struct cfg80211_conn {
 	struct cfg80211_connect_params params;
@@ -320,6 +321,7 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 			       struct cfg80211_bss *bss)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	u8 *country_ie;
 #ifdef CONFIG_WIRELESS_EXT
 	union iwreq_data wrqu;
 #endif
@@ -401,6 +403,20 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 
 	wdev->sme_state = CFG80211_SME_CONNECTED;
 	cfg80211_upload_connect_keys(wdev);
+
+	country_ie = (u8 *) ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
+
+	if (!country_ie)
+		return;
+
+	/*
+	 * ieee80211_bss_get_ie() ensures we can access:
+	 * - country_ie + 2, the start of the country ie data, and
+	 * - and country_ie[1] which is the IE length
+	 */
+	regulatory_hint_11d(wdev->wiphy,
+			    country_ie + 2,
+			    country_ie[1]);
 }
 
 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
-- 
1.6.0.4