From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from 128-177-27-249.ip.openhosting.com ([128.177.27.249]:45667 "EHLO jmalinen.user.openhosting.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751433Ab0AYSci (ORCPT ); Mon, 25 Jan 2010 13:32:38 -0500 Date: Mon, 25 Jan 2010 10:32:24 -0800 From: Jouni Malinen To: "Luis R. Rodriguez" Cc: Johannes Berg , wey-yi.w.guy@intel.com, linux-wireless@vger.kernel.org, Kalle Valo Subject: Re: [PATCH v3 1/1] mac80211: tell driver when dtim change detected Message-ID: <20100125183224.GA19528@jm.kir.nu> References: <1264109996-15995-1-git-send-email-wey-yi.w.guy@intel.com> <1264186981.2593.10.camel@johannes.local> <43e72e891001221120i79c6525bo4852cb5a6c7a37@mail.gmail.com> <1264189560.2593.14.camel@johannes.local> <43e72e891001221544j1b1bd67ao8dfcf4d0dd12dd81@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <43e72e891001221544j1b1bd67ao8dfcf4d0dd12dd81@mail.gmail.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: On Fri, Jan 22, 2010 at 03:44:41PM -0800, Luis R. Rodriguez wrote: > OK. Still curious, if in practice would funky APs ever tune DTIM > dynamically and not kick you off, and if they do is it fair to ignore > that and blame the AP? As far as I can tell, the standard requires you to restart the BSS if you change the DTIM value. I don't think there is explicit requirement for the AP to send you a deauthentication or disassociation frame, though, but I would expect the association to be lost if the AP is compliant with the standard. Anyway, it is not like all APs really follow the standard requirements in all cases, so I would not be to surprised to hear about an AP that changes the DTIM value more dynamically. Anyway, that is just asking for problems due to the way a specific timestamps are defined to be used for the beacons that are followed by buffered multicast/broadcast frames. -- Jouni Malinen PGP id EFC895FA