From patchwork Thu May 28 14:50:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Berg X-Patchwork-Id: 215484 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1DCA1C433DF for ; Thu, 28 May 2020 14:54:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 036242075F for ; Thu, 28 May 2020 14:54:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391282AbgE1OyS (ORCPT ); Thu, 28 May 2020 10:54:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45928 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391230AbgE1OyR (ORCPT ); Thu, 28 May 2020 10:54:17 -0400 Received: from sipsolutions.net (s3.sipsolutions.net [IPv6:2a01:4f8:191:4433::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 164E5C08C5C6 for ; Thu, 28 May 2020 07:54:17 -0700 (PDT) Received: by sipsolutions.net with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.93) (envelope-from ) id 1jeJrZ-004vYI-IQ; Thu, 28 May 2020 16:50:29 +0200 From: Johannes Berg To: linux-wireless@vger.kernel.org Cc: Rajkumar Manoharan , Pradeep Kumar Chitrapu , Shaul Triebitz Subject: [PATCH 14/24] mac80211: check the correct bit for EMA AP Date: Thu, 28 May 2020 16:50:10 +0200 Message-Id: <20200528165011.d41fcb4a40ea.I9745582f8d41ad8e689dac0fefcd70b276d7c1ea@changeid> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200528165011.993f108e96ca.I0086ae42d672379380d04ac5effb2f3d5135731b@changeid> References: <20200528165011.993f108e96ca.I0086ae42d672379380d04ac5effb2f3d5135731b@changeid> MIME-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Shaul Triebitz An AP supporting EMA (Enhanced Multi-BSSID advertisement) should set bit 83 in the extended capabilities IE (9.4.2.26 in the 802.11ax D5 spec). So the *3rd* bit of the 10th byte should be checked. Also, in one place, the wrong byte was checked. (cfg80211_find_ie returns a pointer to the beginning of the IE, so the data really starts at ie[2], so the 10th byte should be ie[12]. To avoid this confusion, use cfg80211_find_elem instead). Signed-off-by: Shaul Triebitz Signed-off-by: Johannes Berg --- include/linux/ieee80211.h | 2 +- net/mac80211/mlme.c | 18 +++++++++--------- 2 files changed, 10 insertions(+), 10 deletions(-) diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index 9580dfd9e2d1..1ecfd19f836d 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -3082,7 +3082,7 @@ enum ieee80211_tdls_actioncode { #define WLAN_EXT_CAPA10_OBSS_NARROW_BW_RU_TOLERANCE_SUPPORT BIT(7) /* Defines support for enhanced multi-bssid advertisement*/ -#define WLAN_EXT_CAPA11_EMA_SUPPORT BIT(1) +#define WLAN_EXT_CAPA11_EMA_SUPPORT BIT(3) /* TDLS specific payload type in the LLC/SNAP header */ #define WLAN_TDLS_SNAP_RFTYPE 0x2 diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 8e74ead73d97..abb507908982 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -5591,7 +5591,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, assoc_data->timeout_started = true; assoc_data->need_beacon = true; } else if (beacon_ies) { - const u8 *ie; + const struct element *elem; u8 dtim_count = 0; ieee80211_get_dtim(beacon_ies, &dtim_count, @@ -5608,15 +5608,15 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, sdata->vif.bss_conf.sync_dtim_count = dtim_count; } - ie = cfg80211_find_ext_ie(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, - beacon_ies->data, beacon_ies->len); - if (ie && ie[1] >= 3) - sdata->vif.bss_conf.profile_periodicity = ie[4]; + elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, + beacon_ies->data, beacon_ies->len); + if (elem && elem->datalen >= 3) + sdata->vif.bss_conf.profile_periodicity = elem->data[2]; - ie = cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, - beacon_ies->data, beacon_ies->len); - if (ie && ie[1] >= 11 && - (ie[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) + elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, + beacon_ies->data, beacon_ies->len); + if (elem && elem->datalen >= 11 && + (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) sdata->vif.bss_conf.ema_ap = true; } else { assoc_data->timeout = jiffies;