From patchwork Fri Oct 7 08:53:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 13000917 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 37A0FC4332F for ; Fri, 7 Oct 2022 08:54:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229729AbiJGIyF (ORCPT ); Fri, 7 Oct 2022 04:54:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56116 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229865AbiJGIxq (ORCPT ); Fri, 7 Oct 2022 04:53:46 -0400 Received: from relay8-d.mail.gandi.net (relay8-d.mail.gandi.net [217.70.183.201]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5F27111755E; Fri, 7 Oct 2022 01:53:40 -0700 (PDT) Received: (Authenticated sender: miquel.raynal@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id CBEB11BF20D; Fri, 7 Oct 2022 08:53:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1665132818; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=eMfsmZ4JLreXYcYVpxJN9ZOZqTgP49RxDVxSHvzYNgU=; b=JhC9NEzFAQbx/7UH6roy/nq/hglTFM+WwUaoNCWoj0ZAAi0lUFV0VYcq1RVxt4/E3GQ35t c7pr1QWg9ntEHDQfpjicrkwq/3rHDUfo5K3byB/9cdbEOFNEI++UbStMLUBveYTBuNtfQ8 FLrO3k2+jXJ5ipkiDRgI/CXxGF5we0EEIziB3CU+G7SjnJBJ8Q4OI04+63CTZwRR8GuT47 3NDO1cWfv77EIoVqot1M8xOEmY4d/SiZ3wX7UiXG8Ppkiu62snXccESfjR53a3Bb91OrgP 5CvMsOaHA+pA9XXF6D6G3+JlLi0cstTiSFq/o1sKfxcVl9N58REIjhM1tvOMGA== From: Miquel Raynal To: Alexander Aring , Stefan Schmidt , linux-wpan@vger.kernel.org Cc: "David S. Miller" , Jakub Kicinski , Paolo Abeni , Eric Dumazet , netdev@vger.kernel.org, David Girault , Romuald Despres , Frederic Blain , Nicolas Schodet , Thomas Petazzoni , Miquel Raynal Subject: [PATCH wpan/next v4 8/8] mac802154: Ensure proper scan-level filtering Date: Fri, 7 Oct 2022 10:53:10 +0200 Message-Id: <20221007085310.503366-9-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221007085310.503366-1-miquel.raynal@bootlin.com> References: <20221007085310.503366-1-miquel.raynal@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wpan@vger.kernel.org We now have a fine grained filtering information so let's ensure proper filtering in scan mode, which means that only beacons are processed. Signed-off-by: Miquel Raynal --- net/mac802154/rx.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/net/mac802154/rx.c b/net/mac802154/rx.c index 14bc646b9ab7..4d799b477a7f 100644 --- a/net/mac802154/rx.c +++ b/net/mac802154/rx.c @@ -34,6 +34,7 @@ ieee802154_subif_frame(struct ieee802154_sub_if_data *sdata, struct sk_buff *skb, const struct ieee802154_hdr *hdr) { struct wpan_dev *wpan_dev = &sdata->wpan_dev; + struct wpan_phy *wpan_phy = sdata->local->hw.phy; __le16 span, sshort; int rc; @@ -42,6 +43,17 @@ ieee802154_subif_frame(struct ieee802154_sub_if_data *sdata, span = wpan_dev->pan_id; sshort = wpan_dev->short_addr; + /* Level 3 filtering: Only beacons are accepted during scans */ + if (sdata->required_filtering == IEEE802154_FILTERING_3_SCAN && + sdata->required_filtering > wpan_phy->filtering) { + if (mac_cb(skb)->type != IEEE802154_FC_TYPE_BEACON) { + dev_dbg(&sdata->dev->dev, + "drop !beacon frame (0x%x) during scan\n", + mac_cb(skb)->type); + goto fail; + } + } + switch (mac_cb(skb)->dest.mode) { case IEEE802154_ADDR_NONE: if (hdr->source.mode != IEEE802154_ADDR_NONE) @@ -277,10 +289,6 @@ void ieee802154_rx(struct ieee802154_local *local, struct sk_buff *skb) ieee802154_monitors_rx(local, skb); - /* TODO: Handle upcomming receive path where the PHY is at the - * IEEE802154_FILTERING_NONE level during a scan. - */ - /* Level 1 filtering: Check the FCS by software when relevant */ if (local->hw.phy->filtering == IEEE802154_FILTERING_NONE) { crc = crc_ccitt(0, skb->data, skb->len);