From mboxrd@z Thu Jan 1 00:00:00 1970 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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 73CE8C433E0 for ; Thu, 28 May 2020 14:49:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 56B9B207D3 for ; Thu, 28 May 2020 14:49:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728598AbgE1Otr (ORCPT ); Thu, 28 May 2020 10:49:47 -0400 Received: from p-impout010aa.msg.pkvw.co.charter.net ([47.43.26.141]:47484 "EHLO p-impout001.msg.pkvw.co.charter.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728539AbgE1Otr (ORCPT ); Thu, 28 May 2020 10:49:47 -0400 Received: from localhost ([97.96.18.55]) by cmsmtp with ESMTPA id eJqqjJE4EOQ8heJqrjWzmS; Thu, 28 May 2020 14:49:45 +0000 X-Authority-Analysis: v=2.3 cv=SrXuF8G0 c=1 sm=1 tr=0 a=gnb2rATmHlbHhomeAxXZdQ==:117 a=gnb2rATmHlbHhomeAxXZdQ==:17 a=IkcTkHD0fZMA:10 a=o-53GSTNTxPpq0pbfBgA:9 a=QEXdDO2ut3YA:10 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Subject: Re: iwlwifi: 8265: unexpected LLC packets TX'ed in monitor mode From: "Marco" To: "Johannes Berg" , Date: Thu, 28 May 2020 10:26:04 -0400 Message-Id: In-Reply-To: X-CMAE-Envelope: MS4wfAOq67BEj59AZO74DpW9m/MifcsIuyVHgMfbLrRjLBJC34PnTKOkITiACRxMGt4nko6fHHE9FCp3xXAyV1uJUPvjy/DycxTCFoFC3mh4ii2i9BOkfpQJ //XQYg4ONCvX+FG6SvQKUvs9GviBrYgUiW4tmVdemzOyV0sPVKQqC0OGGMiAD2Jo5n5nWTCSdy9yCdKD60L3Vd7TC3nM2v6iJDQ= Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org On Mon May 25, 2020 at 7:23 AM EDT, Johannes Berg wrote: > On Wed, 2020-05-13 at 13:48 -0400, Marco Fonseca wrote: > > Hello, > >=20 > > While in monitor mode, the 8265 will periodically transmit gratuitous > > LLC packets. In this mode, I would expect the wifi chipset to not > > transmit any packets at all (unless packet injection is being used). > >=20 > > This behavior can be observed by a second wifi device in monitor mode. > > A display filter on wireshark/tshark of 'llc' makes these easy to spot. > >=20 > > It seems these packets only get produced in presence of a few APs > > and/or STAs but I'm not sure of the exact cause. I don't see the LLC > > packets on very quiet channels. > > I think these are somehow related to calibrations in the device. > > johannes Are you perhaps implying that I can alter calibration settings to fix this problem? If you have any pointers to this it would be appreciative. Regardless though, I would still expect the default behavior to not emit packets when in monitor mode, unless the user directs it to; similar to what I've seen from other wifi chipsets. Marco