mac80211: send delBA on unexpected BlockAck Request

If we don't have a BA session, send delBA, as requested by the
IEEE 802.11 spec. Apply the same limit of sending such a delBA
only once as in the previous patch.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index ad636c9..e796060 100644 (file)
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2592,6 +2592,12 @@ ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames)
 
                tid = le16_to_cpu(bar_data.control) >> 12;
 
+               if (!test_bit(tid, rx->sta->ampdu_mlme.agg_session_valid) &&
+                   !test_and_set_bit(tid, rx->sta->ampdu_mlme.unexpected_agg))
+                       ieee80211_send_delba(rx->sdata, rx->sta->sta.addr, tid,
+                                            WLAN_BACK_RECIPIENT,
+                                            WLAN_REASON_QSTA_REQUIRE_SETUP);
+
                tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]);
                if (!tid_agg_rx)
                        return RX_DROP_MONITOR;