cfg80211/nl80211: scanning (and mac80211 update to use it)

This patch adds basic scan capability to cfg80211/nl80211 and
changes mac80211 to use it. The BSS list that cfg80211 maintains
is made driver-accessible with a private area in each BSS struct,
but mac80211 doesn't yet use it. That's another large project.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 42d692fd9be..c8d969be440 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1277,6 +1277,25 @@ static int ieee80211_resume(struct wiphy *wiphy)
 #define ieee80211_resume NULL
 #endif
 
+static int ieee80211_scan(struct wiphy *wiphy,
+                          struct net_device *dev,
+                          struct cfg80211_scan_request *req)
+{
+        struct ieee80211_sub_if_data *sdata;
+
+        if (!netif_running(dev))
+                return -ENETDOWN;
+
+        sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+        if (sdata->vif.type != NL80211_IFTYPE_STATION &&
+            sdata->vif.type != NL80211_IFTYPE_ADHOC &&
+            sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
+                return -EOPNOTSUPP;
+
+        return ieee80211_request_scan(sdata, req);
+}
+
 struct cfg80211_ops mac80211_config_ops = {
         .add_virtual_intf = ieee80211_add_iface,
         .del_virtual_intf = ieee80211_del_iface,
@@ -1309,4 +1328,5 @@ struct cfg80211_ops mac80211_config_ops = {
         .set_mgmt_extra_ie = ieee80211_set_mgmt_extra_ie,
         .suspend = ieee80211_suspend,
         .resume = ieee80211_resume,
+        .scan = ieee80211_scan,
 };