cfg80211: Add channel information to NL80211_CMD_GET_INTERFACE

If the current channel is known, add frequency and channel type to
NL80211_CMD_GET_INTERFACE.
Signed-off-by: NPontus Fuchs <pontus.fuchs@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

include/net/cfg80211.h

@@ -1710,7 +1710,8 @@ struct cfg80211_ops {
 				  struct net_device *dev,
 				  u16 noack_map);
 
-	struct ieee80211_channel *(*get_channel)(struct wiphy *wiphy);
+	struct ieee80211_channel *(*get_channel)(struct wiphy *wiphy,
+					       enum nl80211_channel_type *type);
 };
 
 /*

net/mac80211/cfg.c

@@ -2688,10 +2688,12 @@ static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev,
 }
 
 static struct ieee80211_channel *
-ieee80211_wiphy_get_channel(struct wiphy *wiphy)
+ieee80211_wiphy_get_channel(struct wiphy *wiphy,
+			    enum nl80211_channel_type *type)
 {
 	struct ieee80211_local *local = wiphy_priv(wiphy);
 
+	*type = local->_oper_channel_type;
 	return local->oper_channel;
 }
 

net/wireless/nl80211.c

@@ -1501,6 +1501,19 @@ static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 		    rdev->devlist_generation ^
 			(cfg80211_rdev_list_generation << 2));
 
+	if (rdev->ops->get_channel) {
+		struct ieee80211_channel *chan;
+		enum nl80211_channel_type channel_type;
+
+		chan = rdev->ops->get_channel(&rdev->wiphy, &channel_type);
+		if (chan) {
+			NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ,
+				    chan->center_freq);
+			NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
+				    channel_type);
+		}
+	}
+
 	return genlmsg_end(msg, hdr);
 
  nla_put_failure:

net/wireless/wext-compat.c

@@ -821,6 +821,7 @@ static int cfg80211_wext_giwfreq(struct net_device *dev,
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
 	struct ieee80211_channel *chan;
+	enum nl80211_channel_type channel_type;
 
 	switch (wdev->iftype) {
 	case NL80211_IFTYPE_STATION:
@@ -831,7 +832,7 @@ static int cfg80211_wext_giwfreq(struct net_device *dev,
 		if (!rdev->ops->get_channel)
 			return -EINVAL;
 
-		chan = rdev->ops->get_channel(wdev->wiphy);
+		chan = rdev->ops->get_channel(wdev->wiphy, &channel_type);
 		if (!chan)
 			return -EINVAL;
 		freq->m = chan->center_freq;