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 818A9C433E0 for ; Wed, 13 May 2020 17:56:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 25FB720659 for ; Wed, 13 May 2020 17:56:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732868AbgEMR4E (ORCPT ); Wed, 13 May 2020 13:56:04 -0400 Received: from p-impout010aa.msg.pkvw.co.charter.net ([47.43.26.141]:51055 "EHLO p-impout001.msg.pkvw.co.charter.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1732488AbgEMR4E (ORCPT ); Wed, 13 May 2020 13:56:04 -0400 X-Greylist: delayed 427 seconds by postgrey-1.27 at vger.kernel.org; Wed, 13 May 2020 13:56:04 EDT Received: from 192.168.1.10 ([97.96.18.55]) by cmsmtp with ESMTPA id YvUaj8VgKOQ8hYvV2jw2aH; Wed, 13 May 2020 17:48:57 +0000 X-Authority-Analysis: v=2.3 cv=SrXuF8G0 c=1 sm=1 tr=0 a=gnb2rATmHlbHhomeAxXZdQ==:117 a=gnb2rATmHlbHhomeAxXZdQ==:17 a=kj9zAlcOel0A:10 a=VwQbUJbxAAAA:8 a=F25QkG8zyI3W_E7rkQAA:9 a=CjuIK1q_8ugA:10 a=AjGcO6oz07-iQ99wixmX:22 Date: Wed, 13 May 2020 13:48:27 -0400 From: Marco Fonseca To: linux-wireless@vger.kernel.org Subject: iwlwifi: 8265: unexpected LLC packets TX'ed in monitor mode Message-ID: <20200513174827.3o7odouinuirou62@192.168.1.10> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-CMAE-Envelope: MS4wfEAW151Ani9X9LKaYnlQ371i1xLjoMRbpc1jNkffepkWI3gBigbaTP+4S5upulBiV9eIzhCWfC8lO0K7B3j3Xj1dQGDhvkvld9L8TFNWSIEvjqUEo4kO f5hDY5lgoh++eBZ2arTR0HaDA9H9ALNqmGC2NwzkX0BpMVy1Rg6tuk9HWtJraVz/1YC2vSTIggMegA== Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Hello, 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). 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. 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. Other Details ------------- wifi chipset: Intel(R) Dual Band Wireless AC 8265, REV=0x230 kernel: 4.9.11 kernel backports driver: iwlwifi-stack-public:release/core33:6653:327571a8 I can use other backports versions if needed, but this was the version called out in: https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi/core_release Firmware: 36.952d9faa.0 Thank you, Marco Fonseca