package/kernel/mac80211/patches/345-mac80211-send-delBA-on-unexpected-BlockAck-Request.patch

   1 From: Johannes Berg <johannes.berg@intel.com>
   2 Date: Mon, 29 Aug 2016 23:25:19 +0300
   3 Subject: [PATCH] mac80211: send delBA on unexpected BlockAck Request
   4
   5 If we don't have a BA session, send delBA, as requested by the
   6 IEEE 802.11 spec. Apply the same limit of sending such a delBA
   7 only once as in the previous patch.
   8
   9 Signed-off-by: Johannes Berg <johannes.berg@intel.com>
  10 ---
  11
  12 --- a/net/mac80211/rx.c
  13 +++ b/net/mac80211/rx.c
  14 @@ -2537,6 +2537,12 @@ ieee80211_rx_h_ctrl(struct ieee80211_rx_
  15
  16                 tid = le16_to_cpu(bar_data.control) >> 12;
  17
  18 +               if (!test_bit(tid, rx->sta->ampdu_mlme.agg_session_valid) &&
  19 +                   !test_and_set_bit(tid, rx->sta->ampdu_mlme.unexpected_agg))
  20 +                       ieee80211_send_delba(rx->sdata, rx->sta->sta.addr, tid,
  21 +                                            WLAN_BACK_RECIPIENT,
  22 +                                            WLAN_REASON_QSTA_REQUIRE_SETUP);
  23 +
  24                 tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]);
  25                 if (!tid_agg_rx)
  26                         return RX_DROP_MONITOR;