Return-path: Received: from ra.tuxdriver.com ([70.61.120.52]:3127 "EHLO ra.tuxdriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752221AbYCKRXx (ORCPT ); Tue, 11 Mar 2008 13:23:53 -0400 Date: Tue, 11 Mar 2008 13:10:24 -0400 From: "John W. Linville" To: Dan Williams Cc: Johannes Berg , Masakazu Mokuno , linux-wireless@vger.kernel.org, cbe-oss-dev@ozlabs.org, Geert Uytterhoeven , Stefan Assmann Subject: Re: [PATCH] PS3: gelic: ignore scan info from zero SSID beacons Message-ID: <20080311171024.GA18562@tuxdriver.com> (sfid-20080311_172403_086765_3157540E) References: <20080311130630.0AF0.40F06B3A@sm.sony.co.jp> <1205252287.6387.54.camel@johannes.berg> <1205254237.8774.0.camel@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <1205254237.8774.0.camel@localhost.localdomain> Sender: linux-wireless-owner@vger.kernel.org List-ID: On Tue, Mar 11, 2008 at 12:50:37PM -0400, Dan Williams wrote: > On Tue, 2008-03-11 at 17:18 +0100, Johannes Berg wrote: > > On Tue, 2008-03-11 at 13:15 +0900, Masakazu Mokuno wrote: > > > Some implementations of the hidden SSID APs emit beacons which have the zero > > > length SSID information element instead of SSID padded by null (\0) characters. > > > If the firmware of the PS3 wireless hardware meets these beacons, it abandons parsing > > > IEs. Thus guest OSes get the invalid scan information for the AP. > > > > > > To work around this, ignore these scan informations from the list. > > > > I'm not sure this is a good idea. Is there any way to get at decent > > information from those beacons? > > Yeah, there are quite a few of these out there. Ideally the firmware > wouldn't puke on it... Is a firmware update a possibility? We've had these discussions before. I doubt Sony is any more excited about a firmware spin than Intel has been. Does this problem apply to probe responses as well? (Do probe responses from hidden SSID APs still exclude the SSID? I would guess not.) As long as you can still associate w/ hidden SSID APs, I don't see a big problem. Even if you can't, no information for those APs is probably better than bad information, no? John -- John W. Linville linville@tuxdriver.com