[PATCH] mac80211: honor IW_SCAN_THIS_ESSID in siwscan ioctl

This patch fixes the problem of associating with wpa_secured hidden
AP.  Please try out.

The original author of this patch is Bill Moss <bmoss@clemson.edu>

Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 24 insertions, 16 deletions

diff --git a/net/mac80211/ieee80211_ioctl.c b/net/mac80211/ieee80211_ioctl.c
index 6b4b0d5880db..a57fed77db27 100644
--- a/net/mac80211/ieee80211_ioctl.c
+++ b/net/mac80211/ieee80211_ioctl.c
@@ -511,32 +511,40 @@ static int ieee80211_ioctl_giwap(struct net_device *dev,
 
 static int ieee80211_ioctl_siwscan(struct net_device *dev,
                                    struct iw_request_info *info,
-                                   struct iw_point *data, char *extra)
+                                   union iwreq_data *wrqu, char *extra)
 {
         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+        struct iw_scan_req *req = NULL;
         u8 *ssid = NULL;
         size_t ssid_len = 0;
 
         if (!netif_running(dev))
                 return -ENETDOWN;
 
-        switch (sdata->type) {
-        case IEEE80211_IF_TYPE_STA:
-        case IEEE80211_IF_TYPE_IBSS:
-                if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID) {
-                        ssid = sdata->u.sta.ssid;
-                        ssid_len = sdata->u.sta.ssid_len;
-                }
-                break;
-        case IEEE80211_IF_TYPE_AP:
-                if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID) {
-                        ssid = sdata->u.ap.ssid;
-                        ssid_len = sdata->u.ap.ssid_len;
+        if (wrqu->data.length == sizeof(struct iw_scan_req) &&
+            wrqu->data.flags & IW_SCAN_THIS_ESSID) {
+                req = (struct iw_scan_req *)extra;
+                ssid = req->essid;
+                ssid_len = req->essid_len;
+        } else {
+                switch (sdata->type) {
+                case IEEE80211_IF_TYPE_STA:
+                case IEEE80211_IF_TYPE_IBSS:
+                        if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID) {
+                                ssid = sdata->u.sta.ssid;
+                                ssid_len = sdata->u.sta.ssid_len;
+                        }
+                        break;
+                case IEEE80211_IF_TYPE_AP:
+                        if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID) {
+                                ssid = sdata->u.ap.ssid;
+                                ssid_len = sdata->u.ap.ssid_len;
+                        }
+                        break;
+                default:
+                        return -EOPNOTSUPP;
                 }
-                break;
-        default:
-                return -EOPNOTSUPP;
         }
 
         return ieee80211_sta_req_scan(dev, ssid, ssid_len);