Received-SPF: pass (google.com: best guess record for domain of linux-wireless-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Luca Coelho <luca@coelho.fi>
To:     johannes@sipsolutions.net
Cc:     linux-wireless@vger.kernel.org
Date:   Thu, 26 Mar 2020 14:00:33 +0200
Message-Id: <20200326120042.578777-4-luca@coelho.fi>
In-Reply-To: <20200326120042.578777-1-luca@coelho.fi>
References: <20200326120042.578777-1-luca@coelho.fi>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Subject: [PATCH 03/12] mac80211: Don't destroy auth data in case of anti-clogging
Sender: linux-wireless-owner@vger.kernel.org
Precedence: bulk

From: Andrei Otcheretianski <andrei.otcheretianski@intel.com>

SAE AP may reject authentication with WLAN_STATUS_ANTI_CLOG_REQUIRED.
As the user space will immediately continue the authentication flow,
there is no need to destroy the authentication data in this case.
This saves unneeded station removal and releasing the channel.

Change-Id: I8040a842874aaf6d209df3fc8a2acb97a0bf508b
Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 net/mac80211/mlme.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index f1f518790c12..a0de21a51f65 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2948,10 +2948,15 @@ static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
 	}
 
 	if (status_code != WLAN_STATUS_SUCCESS) {
+		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
+
+		if (auth_alg == WLAN_AUTH_SAE &&
+		    status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED)
+			return;
+
 		sdata_info(sdata, "%pM denied authentication (status %d)\n",
 			   mgmt->sa, status_code);
 		ieee80211_destroy_auth_data(sdata, false);
-		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
 		event.u.mlme.status = MLME_DENIED;
 		event.u.mlme.reason = status_code;
 		drv_event_callback(sdata->local, sdata, &event);
-- 
2.25.1