Subject: Re: [RFC] mac80211: Add HT rates into RX status reporting
From: Johannes Berg <johannes@sipsolutions.net>
To: Jouni Malinen <j@w1.fi>
Cc: linux-wireless@vger.kernel.org,
	Henning Rogge <hrogge@googlemail.com>
In-Reply-To: <20081211181545.GB32500@jm.kir.nu>
References: <20081211161741.GA27460@jm.kir.nu>
	 <1229015789.8081.40.camel@johannes.berg> <20081211181545.GB32500@jm.kir.nu>
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Date: Thu, 11 Dec 2008 19:22:48 +0100
Message-Id: <1229019768.8081.53.camel@johannes.berg> (sfid-20081211_192329_513799_D7209E8A)
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On Thu, 2008-12-11 at 20:15 +0200, Jouni Malinen wrote:

> > Can we just leave off the bitrate for HT for now?
>=20
> Yes. FreeBSD radiotap definition uses 0x80 as a flag in the rate field
> for indicating that it is an MCS index, not bitrate. That works fine
> here, too, and I'll update my patch to use the same style. No more
> bitrate calculation for HT rates in mac80211 after that..

Ugh. Nobody will dissect that properly. Do you actually need this
information in userland _now_? Otherwise, Dave Young is moving the list
elsewhere and then we can properly define this in radiotap rather than
going with some other set. 0x80 in flags (not rate) is used to indicate
short-GI in wireshark, and it's all very confusing... I'd rather see a
new "HT rate" field added to radiotap.

> I did not want to think about anything for IBSS.. ;-)  One should just
> probe the other STA if you want to learn what it can do..

Right. Who cares about IBSS :)

johannes

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