wifi: mac80211: accept broadcast probe responses on 6 GHz

On the 6 GHz band, probe responses are sent as broadcast to
optimise medium usage. However, without OCE configuration
we weren't accepting them, which is wrong, even if wpa_s is
by default enabling OCE. Accept them without the OCE config
as well.

Link: https://msgid.link/20240129200907.5a89c2821897.I92e9dfa0f9b350bc7f37dd4bb38031d156d78d8a@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 645355e5f1bc7baba435db18c0c8d8243a4649c6..f9d5842601fa9433ba0303f3b6572129b3e2f9fe 100644 (file)
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -9,7 +9,7 @@
  * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
  * Copyright 2013-2015  Intel Mobile Communications GmbH
  * Copyright 2016-2017  Intel Deutschland GmbH
- * Copyright (C) 2018-2023 Intel Corporation
+ * Copyright (C) 2018-2024 Intel Corporation
  */
 
 #include <linux/if_arp.h>
@@ -237,14 +237,18 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
 }
 
 static bool ieee80211_scan_accept_presp(struct ieee80211_sub_if_data *sdata,
+                                       struct ieee80211_channel *channel,
                                        u32 scan_flags, const u8 *da)
 {
        if (!sdata)
                return false;
-       /* accept broadcast for OCE */
-       if (scan_flags & NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP &&
-           is_broadcast_ether_addr(da))
+
+       /* accept broadcast on 6 GHz and for OCE */
+       if (is_broadcast_ether_addr(da) &&
+           (channel->band == NL80211_BAND_6GHZ ||
+            scan_flags & NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP))
                return true;
+
        if (scan_flags & NL80211_SCAN_FLAG_RANDOM_ADDR)
                return true;
        return ether_addr_equal(da, sdata->vif.addr);
@@ -293,6 +297,12 @@ void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)
                wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work, 0);
        }
 
+       channel = ieee80211_get_channel_khz(local->hw.wiphy,
+                                           ieee80211_rx_status_to_khz(rx_status));
+
+       if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
+               return;
+
        if (ieee80211_is_probe_resp(mgmt->frame_control)) {
                struct cfg80211_scan_request *scan_req;
                struct cfg80211_sched_scan_request *sched_scan_req;
@@ -310,19 +320,15 @@ void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)
                /* ignore ProbeResp to foreign address or non-bcast (OCE)
                 * unless scanning with randomised address
                 */
-               if (!ieee80211_scan_accept_presp(sdata1, scan_req_flags,
+               if (!ieee80211_scan_accept_presp(sdata1, channel,
+                                                scan_req_flags,
                                                 mgmt->da) &&
-                   !ieee80211_scan_accept_presp(sdata2, sched_scan_req_flags,
+                   !ieee80211_scan_accept_presp(sdata2, channel,
+                                                sched_scan_req_flags,
                                                 mgmt->da))
                        return;
        }
 
-       channel = ieee80211_get_channel_khz(local->hw.wiphy,
-                                       ieee80211_rx_status_to_khz(rx_status));
-
-       if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
-               return;
-
        bss = ieee80211_bss_info_update(local, rx_status,
                                        mgmt, skb->len,
                                        channel);