package/kernel/mac80211/patches/313-mac80211-drop-4-addr-VLAN-frames-earlier-if-not-conn.patch

   1 From: Johannes Berg <johannes.berg@intel.com>
   2 Date: Fri, 20 Mar 2015 16:24:22 +0100
   3 Subject: [PATCH] mac80211: drop 4-addr VLAN frames earlier if not
   4  connected
   5
   6 If there's no station on the 4-addr VLAN interface, then frames
   7 cannot be transmitted. Drop such frames earlier, before setting
   8 up all the information for them.
   9
  10 We should keep the old check though since that code might be used
  11 for other internally-generated frames.
  12
  13 Signed-off-by: Johannes Berg <johannes.berg@intel.com>
  14 ---
  15
  16 --- a/net/mac80211/tx.c
  17 +++ b/net/mac80211/tx.c
  18 @@ -1921,6 +1921,9 @@ static struct sk_buff *ieee80211_build_h
  19                         authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
  20                         wme_sta = sta->sta.wme;
  21                         have_station = true;
  22 +               } else if (sdata->wdev.use_4addr) {
  23 +                       ret = -ENOLINK;
  24 +                       goto free;
  25                 }
  26                 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
  27                                         u.ap);