Re: DLT for IEEE802.15.4 no FCS frames

[Jon Smirl <jonsmirl () gmail com>]

On Fri, Aug 6, 2010 at 3:04 PM, Jon Smirl <jonsmirl () gmail com> wrote:
> On Fri, Aug 6, 2010 at 2:51 PM, Guy Harris <guy () alum mit edu> wrote:
> > On Aug 6, 2010, at 11:47 AM, Jon Smirl wrote:
> >
> > > Can I request a DLT for IEEE802.15.4 no FCS frames.
> > >
> > > The ARPHRD for these frames is already in the Linux kernel:
> > > #define ARPHRD_IEEE802154         804
> >
> > So that's with a standard 802.15.4 header (as opposed to, say, headers with addresses padded to the maximum length), 
> > and no FCS?-
>
> This one is the full packet with FCS as a radio sees it
> #define DLT_IEEE802_15_4        195

This one probably should have been a radio tap type interface and
included channel number. But it is too late now.

> Not all radios provide access to the FCS internally so it is stripped
> in the Linux implementation. That's the only difference from the first
> one. so we need another DLT....
> #define DLT_IEEE_802154                 230
>
> I'm not sure what this one is, he never submitted any code to the kernel.
>  * IEEE 802.15.4, with address fields padded, as is done by Linux
>  * drivers; requested by Juergen Schimmer.
>  */
> #define DLT_IEEE802_15_4_LINUX  191
>
>
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>
>
>
> --
> Jon Smirl
> jonsmirl () gmail com



-- 
Jon Smirl
jonsmirl () gmail com
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