Re: use of radiotap bit 14?

On Thu, 2008-06-19 at 12:33 -0700, Guy Harris wrote:
> Johannes Berg wrote:
> 
> > Problem is, wireshark actually takes bit 14 to mean "FCS in header".
> > Easily changed though if Gerald is willing to take such a patch, I can
> > cook up a patch to make it parse the fields above.
> 
> OpenBSD defines 14 as IEEE80211_RADIOTAP_FCS.  However, a search through 
> the top-of-CVS-tree OpenBSD kernel code shows nothing that *uses* that 
> presence bit, and neither top-of-tree FreeBSD nor NetBSD use it (I 
> assume from what Sam Leffler said that no FreeBSD release did, and given 
> that NetBSD uses it for other purposes I assume no NetBSD release did), 
> and I assume, given that you're proposing this, that Linux doesn't use 
> it for that purpose.

Ok, cool. Yes, we use the RX flags meaning for bit 14. I guess we
shouldn't have started doing that but that stuff was there before I
understood the issue.

johannes

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