From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Young Subject: Re: [RFA] HT extensions Date: Tue, 5 Oct 2010 13:56:36 -0500 Message-ID: <20101005185636.GJ14183@ojctech.com> References: <1284595489.3707.54.camel@jlt3.sipsolutions.net> <20101005182108.GH14183@ojctech.com> <1286303263.3641.23.camel@jlt3.sipsolutions.net> <20101005184252.GI14183@ojctech.com> <1286304616.3641.25.camel@jlt3.sipsolutions.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1286304616.3641.25.camel-8upI4CBIZJIJvtFkdXX2HixXY32XiHfO@public.gmane.org> Sender: radiotap-owner-sUITvd46vNxg9hUCZPvPmw@public.gmane.org To: Radiotap List-Id: radiotap@radiotap.org On Tue, Oct 05, 2010 at 08:50:16PM +0200, Johannes Berg wrote: > On Tue, 2010-10-05 at 13:42 -0500, David Young wrote: > > On Tue, Oct 05, 2010 at 08:27:43PM +0200, Johannes Berg wrote: > > > On Tue, 2010-10-05 at 13:21 -0500, David Young wrote: > > > > How can an application use the first/last-frame information? > > > > > > Well, right now my wireshark patch is simply displaying it, but it could > > > also link up frames of an a-MPDU so you can jump between them, and with > > > this it can know what the framing was. If you just know a frame was part > > > of an aMPDU you won't know which one, this should help. > > > > I have my doubts about that. How do you distinguish the case where the > > NIC gives you the first MPDU of A-MPDU 1 and the last MPDU of A-MPDU 2 > > from the case where the NIC gives you the first and last MPDU of the > > same A-MPDU? > > You mean with imperfect capturing? Otherwise you should've seen the last > of A-MPDU 1 inbetween that, I'd think. But you're right, doing this > perfectly is quite hard, and I don't really have a good use case in mind > either. I'm happy to leave it off, at least for now, until somebody can > demonstrate a working way to convey this information. I favor leaving it off for now. Dave -- David Young OJC Technologies dyoung-eZodSLrBbDpBDgjK7y7TUQ@public.gmane.org Urbana, IL * (217) 278-3933