Re: Inefficiency in BPF code for DLT_RAW

[Sebastien Roy <Sebastien.Roy () Sun COM>]

On Wed, 2009-12-23 at 18:09 -0800, Guy Harris wrote:
> On Dec 23, 2009, at 2:01 AM, Darren Reed wrote:
>
> > The links that support the IP tunnels are a fixed type, be
> > it IPv4 or IPv6, and are reported as being DLT_RAW because
> > there is no real layer 2 header present.
>
>       ...
>
> > In the face of modern processors, this might seem like
> > micro-optimisation but I see it more as a precision error:
> > it is not possible to precisely tell libpcap (and thus the
> > BPF compiler) that a link only sees one protocol and
> > therefore does not need to handle both protocol cases.
> >
> > Thoughts?
>
> DLT_IPv4 and DLT_IPv6?

Sounds like a fine idea to me.

-Seb


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