Re: use of radiotap bit 14?

Johannes Berg <[email protected]> Thu, 19 Jun 2008 19:59:47 +0200

Newsgroups	org.netbsd.radiotap
Message-ID	<[email protected]>

On Thu, 2008-06-19 at 19:44 +0200, Johannes Berg wrote:
> Ok, I tried collecting all the information, and here's what I found so
> far:
> 
> http://www.radiotap.org/suggested-fields
> 
> Bits 14, 15 and 16 are defined twice.

I just noticed that at least wireshark also defines two non-standard
bits for the 'flags' field (field bit 1):

#define IEEE80211_RADIOTAP_F_BADFCS     0x40    /* does not pass FCS check */
#define IEEE80211_RADIOTAP_F_SHORTGI    0x80    /* HT short GI */

Also, it defines that if the rate (field bit 2) is >= 0x80 (or rather,
has bit 0x80 set) then the lower 4 bits are used to define some HT rate?

Where the hell did that come from?

Crap. I'm starting to consider just cycling the version number for linux
(to 42!) and you guys can play catch-up for each OS by itself rather
than us trying to figure out wtf. we should do.

:(

johannes

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