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From: Luca Coelho <luca@coelho.fi>
To: johannes@sipsolutions.net
Cc: luca@coelho.fi, linux-wireless@vger.kernel.org
Subject: [PATCH 16/31] cfg80211: Support hidden AP discovery over 6GHz band
Date: Fri, 18 Jun 2021 13:41:41 +0300	[thread overview]
Message-ID: <iwlwifi.20210618133832.218df9d3203c.Ice0f7a2f6a65f1f9710b7898591481baeefaf490@changeid> (raw)
In-Reply-To: <20210618104156.747775-1-luca@coelho.fi>

From: Ilan Peer <ilan.peer@intel.com>

To discover a hidden AP on the 6GHz band, the probe request
sent to the AP needs to include the AP's SSID, as some APs
would not respond with a probe response based only on short
SSID match.

To support hidden AP discovery over the 6GHz band,
when constructing the specific 6GHz band scan also include
SSIDs that were part of the original scan request, so these
can be used in the probe requests transmitted during scan.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 net/wireless/scan.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 4f06c1825029..86cd66952131 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -5,7 +5,7 @@
  * Copyright 2008 Johannes Berg <johannes@sipsolutions.net>
  * Copyright 2013-2014  Intel Mobile Communications GmbH
  * Copyright 2016	Intel Deutschland GmbH
- * Copyright (C) 2018-2020 Intel Corporation
+ * Copyright (C) 2018-2021 Intel Corporation
  */
 #include <linux/kernel.h>
 #include <linux/slab.h>
@@ -757,7 +757,8 @@ static int cfg80211_scan_6ghz(struct cfg80211_registered_device *rdev)
 	}
 
 	request = kzalloc(struct_size(request, channels, n_channels) +
-			  sizeof(*request->scan_6ghz_params) * count,
+			  sizeof(*request->scan_6ghz_params) * count +
+			  sizeof(*request->ssids) * rdev_req->n_ssids,
 			  GFP_KERNEL);
 	if (!request) {
 		cfg80211_free_coloc_ap_list(&coloc_ap_list);
@@ -848,9 +849,18 @@ static int cfg80211_scan_6ghz(struct cfg80211_registered_device *rdev)
 
 	if (request->n_channels) {
 		struct cfg80211_scan_request *old = rdev->int_scan_req;
-
 		rdev->int_scan_req = request;
 
+		/*
+		 * Add the ssids from the parent scan request to the new scan
+		 * request, so the driver would be able to use them in its
+		 * probe requests to discover hidden APs on PSC channels.
+		 */
+		request->ssids = (void *)&request->channels[request->n_channels];
+		request->n_ssids = rdev_req->n_ssids;
+		memcpy(request->ssids, rdev_req->ssids, sizeof(*request->ssids) *
+		       request->n_ssids);
+
 		/*
 		 * If this scan follows a previous scan, save the scan start
 		 * info from the first part of the scan
-- 
2.32.0


  parent reply	other threads:[~2021-06-18 10:49 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-18 10:41 [PATCH 00/31] cfg80211/mac80211 patches from our internal tree 2021-06-18 Luca Coelho
2021-06-18 10:41 ` [PATCH 01/31] mac80211: add HE 6GHz cap IE in 6GHz band only Luca Coelho
2021-06-18 10:41 ` [PATCH 02/31] mac80211: do not add twice the HE 6GHz cap IE Luca Coelho
2021-06-18 17:14   ` Florian Fainelli
2021-06-18 20:17     ` Luca Coelho
2021-06-23 11:04       ` Luca Coelho
2021-06-18 10:41 ` [PATCH 03/31] ieee80211: define timing measurement in extended capabilities IE Luca Coelho
2021-06-18 10:41 ` [PATCH 04/31] cfg80211: make certificate generation more robust Luca Coelho
2021-06-18 10:41 ` [PATCH 05/31] mac80211: handle rate control (RC) racing with chanctx definition Luca Coelho
2021-06-18 10:41 ` [PATCH 06/31] cfg80211: avoid double free of PMSR request Luca Coelho
2021-06-18 10:41 ` [PATCH 07/31] mac80211: allow SMPS requests only in client mode Luca Coelho
2021-06-18 10:41 ` [PATCH 08/31] mac80211: free skb in WEP error case Luca Coelho
2021-06-18 10:41 ` [PATCH 09/31] mac80211: move SMPS mode setting after ieee80211_prep_connection Luca Coelho
2021-06-18 10:41 ` [PATCH 10/31] mac80211: add to bss_conf if broadcast TWT is supported Luca Coelho
2021-06-18 10:41 ` [PATCH 11/31] nl80211/cfg80211: add BSS color to NDP ranging parameters Luca Coelho
2021-06-18 10:41 ` [PATCH 12/31] mac80211: Properly WARN on HW scan before restart Luca Coelho
2021-06-18 10:41 ` [PATCH 13/31] ieee80211: add defines for HE PHY cap byte 10 Luca Coelho
2021-06-18 10:41 ` [PATCH 14/31] cfg80211: add cfg80211_any_usable_channels() Luca Coelho
2021-06-18 10:41 ` [PATCH 15/31] mac80211: conditionally advertise HE in probe requests Luca Coelho
2021-06-18 10:41 ` Luca Coelho [this message]
2021-06-18 10:41 ` [PATCH 17/31] mac80211: always include HE 6GHz capability in probe request Luca Coelho
2021-06-18 10:41 ` [PATCH 18/31] mac80211: always include HE 6GHz capability in assoc request Luca Coelho
2021-06-18 10:41 ` [PATCH 19/31] mac80211: rearrange struct txq_info for fewer holes Luca Coelho
2021-06-18 10:41 ` [PATCH 20/31] mac80211: handle various extensible elements correctly Luca Coelho
2021-06-18 10:41 ` [PATCH 21/31] cfg80211: set custom regdomain after wiphy registration Luca Coelho
2021-06-18 10:41 ` [PATCH 22/31] mac80211: improve AP disconnect message Luca Coelho
2021-06-18 10:41 ` [PATCH 23/31] cfg80211: trace more information in assoc trace event Luca Coelho
2021-06-18 10:41 ` [PATCH 24/31] mac80211: reset profile_periodicity/ema_ap Luca Coelho
2021-06-18 10:41 ` [PATCH 25/31] mac80211: remove use of ieee80211_get_he_sta_cap() Luca Coelho
2021-06-18 10:41 ` [PATCH 26/31] cfg80211: remove ieee80211_get_he_sta_cap() Luca Coelho
2021-06-18 10:41 ` [PATCH 27/31] cfg80211: allow advertising vendor-specific capabilities Luca Coelho
2021-06-18 10:41 ` [PATCH 28/31] mac80211: add vendor-specific capabilities to assoc request Luca Coelho
2021-06-18 10:41 ` [PATCH 29/31] mac8021: Allow probe request injection on passive non radar channels Luca Coelho
2021-06-18 10:41 ` [PATCH 30/31] mac80211: notify driver on mgd TX completion Luca Coelho
2021-06-18 10:41 ` [PATCH 31/31] cfg80211: reg: improve bad regulatory warning Luca Coelho

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