From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from nick.hrz.tu-chemnitz.de ([134.109.228.11]:56532 "EHLO nick.hrz.tu-chemnitz.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755725Ab3AIOdQ (ORCPT ); Wed, 9 Jan 2013 09:33:16 -0500 Date: Wed, 9 Jan 2013 15:33:04 +0100 From: Simon Wunderlich To: Christian Lamparter Cc: Simon Wunderlich , Adrian Chadd , Johannes Berg , linux-wireless@vger.kernel.org, linville@tuxdriver.com, mathias.kretschmer@fokus.fraunhofer.de, Simon Wunderlich Subject: Re: [PATCH] nl80211: allow ad-hoc to set WMM parameters from outside Message-ID: <20130109143304.GA23469@pandem0nium> (sfid-20130109_153319_972408_43D83857) References: <1354042232-32428-1-git-send-email-siwu@hrz.tu-chemnitz.de> <20130109131540.GA22836@pandem0nium> <201301091510.49723.chunkeey@googlemail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="jI8keyz6grp/JLjh" In-Reply-To: <201301091510.49723.chunkeey@googlemail.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: --jI8keyz6grp/JLjh Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello Christian, On Wed, Jan 09, 2013 at 03:10:49PM +0100, Christian Lamparter wrote: > On Wednesday, January 09, 2013 02:15:40 PM Simon Wunderlich wrote: > > On Tue, Jan 08, 2013 at 09:28:44AM -0800, Adrian Chadd wrote: > > > I still populate the WME fields; I need to "fix" paying attention to > > > them in the adhoc case. > >=20 > > Applying the EDCA parameters in the hardware and sending "standard" WME= IEs > > (without EDCA parameter sets) is understandable, Linux does that too.= =20 >=20 > Well, the WFA WMM Specification v1.2 costs $99 (last time I checked, whic= h wasn't > too long ago). However Johannes told me that the WMM IE should not be add= ed > to IBSS beacons. I don't have the spec, and I don't intend to buy it. :) But: We do have WMM IE sent by Linux IBSS STAs even today. The difference t= o the AP WMM IEs is that it doesn't include EDCA parameters (cwmin/max, aifs, ...). = But still, this is useful to detect that the other IBBS station is WMM-capable: we can= then use QOS_DATA frames, use noack, etc ... >=20 > However, we can still pack some EDCA parameters into beacons, probe/(re-)= assoc > resps because there's an alternative IE. The "EDCA Parameter Set IE" is p= art of > 802.11-2012 8.4.2.31 - The Element ID is 12 [Table 8-54]. Ah didn't know that - thanks for pointing that out. Although I'm still in f= avor of not sending anything in IBSS and do local changes only. :) >=20 > [Note: It's worth mentioning that the WFA WMM spec was just a stop-gap me= asure > until 802.11e was ready. Here's an article which explains this weird bit = of > history, unfortunately it is in German > ] >=20 > Regards, > Chr --jI8keyz6grp/JLjh Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEARECAAYFAlDtf6AACgkQrzg/fFk7axbEFQCgpThv1yKA5DPIT57EEmuNcWCq 2PkAoIzve77LmHmcGRkKlgzQ6DQ4BseM =tXBG -----END PGP SIGNATURE----- --jI8keyz6grp/JLjh--