Return-path: Received: from mail.candelatech.com ([208.74.158.172]:41352 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751761Ab1EXEsw (ORCPT ); Tue, 24 May 2011 00:48:52 -0400 Message-ID: <4DDB38AE.1060600@candelatech.com> (sfid-20110524_064856_044063_CAA86B35) Date: Mon, 23 May 2011 21:48:46 -0700 From: Ben Greear MIME-Version: 1.0 To: "Luis R. Rodriguez" CC: David Quan , Mohammed Shafi , "linux-wireless@vger.kernel.org" Subject: Re: ath9k 9380: All 5Ghz channels flagged as passive-scanning References: <4DD6E9B5.3020905@candelatech.com> <4DDA913B.1060002@candelatech.com> <4DDAA9ED.1050606@candelatech.com> <4DDAACF3.3050705@candelatech.com> <4DDABEE9.9090608@candelatech.com> <4DDAC8DC.5060803@candelatech.com> <4DDACF56.9070403@candelatech.com> <4DDAD3D5.1070001@candelatech.com> <4DDAD8B9.8090802@candelatech.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: On 05/23/2011 03:15 PM, Luis R. Rodriguez wrote: > On Mon, May 23, 2011 at 2:59 PM, Ben Greear wrote: >> On 05/23/2011 02:46 PM, Luis R. Rodriguez wrote: >>> >>> On Mon, May 23, 2011 at 2:42 PM, Luis R. Rodriguez >>> wrote: >>> >>>> No. You can only do this by trying to take the card out of compliance >>>> purposely or unknowingly in software. >>> >>> Oh and my point was that "regulatory hacks" fit this description. >> >> Ok. I believe you are right in general, but I can't see how enabling >> a device to work on a non-scanned channel can break something, > > If a card is world roaming, how else on earth without seeing a beacon > will you know if you can initiate radiation on that channel? I have a strong personal sense of location, and I'm 100% sure that I'm in the US. So, the the computer could listen to it's human and just trust that I know WTF I am asking for! It may currently be impossible for vendors to explicitly support this due to regulatory domains that assume users are evil and/or stupid and not to be trusted to know their current location, but please don't pretend that receiving a beacon is rock solid evidence of a channel's availability: It only means that someone else that set up the AP thinks it's available for use. >> if it is perfectly legal and appropriate for there to be an AP on that >> scanned channel. > > Agreed! In fact I'd go so far as to say that if you have multiple > 802.11 cards they should be able to share the same beacon hints, and > in fact -- this is what cfg80211 does ;) > >> In other words, if I change my Netgear to be on channel >> 48, scanned it, and then created a VAP on that channel, that is OK with >> un-hacked regdomain stuff, but if instead I change regdomain to 0x0 >> and use channel 48 without re-configuring my Netgear, somehow that >> suddenly causes issues? > > For Atheros EEPROM 0x0 is designed for usage for the US: Good..that's all I really wanted: My NIC to support my location w/out undue complaint or limitations. Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com