Re: Variable length mac headers and gencode.c (and DLT request)

[Guy Harris <guy () alum mit edu>]

On May 10, 2011, at 1:40 PM, Darren Reed wrote:

> To pursue this a little further, experimenting has
> determined that the best layout thus far would be
> something similar to this:
>
> bits  field
> 00-07 version (1)
> 08-15 pad (0)
> 16-31 pre-mac payload length
> 32-63 dlt (DLT_*)
> 64-79 ethernet protocol number
> 80-95 pad (0)

What about packets for which there is no appropriate Ethernet protocol number value, such as:

        various link control protocols for PPP;

        management and control frames for 802.11 (and similar frames for older LAN technologies such as FDDI and Token 
Ring);

        LAN frames with 802.2 headers with DSAPs for which there's no Ethernet protocol number;

        LAN frames with 802.2+SNAP headers with an OUI other than 0x000000;

etc.?

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