cfg80211: add more flexible BSS lookup

Add a more flexible BSS lookup function so that mac80211 or
other drivers can actually use this for getting the BSS to
connect to.

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

1 files changed, 8 insertions, 2 deletions

diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index aacccc9ab6ca..b1893c863b97 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -116,9 +116,12 @@ static bool is_bss(struct cfg80211_bss *a,
 {
         const u8 *ssidie;
 
-        if (compare_ether_addr(a->bssid, bssid))
+        if (bssid && compare_ether_addr(a->bssid, bssid))
                 return false;
 
+        if (!ssid)
+                return true;
+
         ssidie = find_ie(WLAN_EID_SSID,
                          a->information_elements,
                          a->len_information_elements);
@@ -199,7 +202,8 @@ static int cmp_bss(struct cfg80211_bss *a,
 struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy,
                                       struct ieee80211_channel *channel,
                                       const u8 *bssid,
-                                      const u8 *ssid, size_t ssid_len)
+                                      const u8 *ssid, size_t ssid_len,
+                                      u16 capa_mask, u16 capa_val)
 {
         struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy);
         struct cfg80211_internal_bss *bss, *res = NULL;
@@ -207,6 +211,8 @@ struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy,
         spin_lock_bh(&dev->bss_lock);
 
         list_for_each_entry(bss, &dev->bss_list, list) {
+                if ((bss->pub.capability & capa_mask) != capa_val)
+                        continue;
                 if (channel && bss->pub.channel != channel)
                         continue;
                 if (is_bss(&bss->pub, bssid, ssid, ssid_len)) {