Re: Extra DLT types required for opensolaris DLPI DL

[Darren Reed <Darren.Reed () Sun COM>]

Sebastien Roy wrote:
> ...
> It might also be simplest for BPF to hook into the ipnet driver anyway,
> as the driver implements all kinds of heuristics to ensure that the
> observer doesn't see packets that shouldn't be seen (as related to
> zones).  Some code sharing would be beneficial, and the header could be
> part of that sharing.  In any case, I think this is getting into
> implementation, and probably putting the cart before the horse.

That is the intention... +/- some tweaks to the implementation ;)


> > - with respect to all of the above, it may be beneficial to keep 
> > DL_IPNET as a private header type for libdlpi to use when opening 
> > /dev/ipnet things, the further away I can stay from snoop the better.
>
> Let's keep snoop out of it, since I think it's unrelated to this
> discussion.  It just happens to be something that groks DL_IPNET.
> DL_IPNET isn't a private thing, it's quite Public, in fact, the goal was
> to add support for it in libpcap and eventually have applications like
> tcpdump and Ethereal parse the resulting headers.

Ok, well that didn't happen...

Anyway, even though DL_IPNET is assigned in <sys/dlpi.h>, that
number space is quite separate from that what is used by BPF -
that is what started this thread.  There needs to be a mapping
of DL_IPNET to something that ships with libpcap for use by BPF.
At this point my suggestion is for that something to be DLT_LOOP_SOLARIS.
As an example, DL_ETHER from <sys/dlpi.h> needs to be mapped to
DLT_EN10MB for <net/bpf.h>.

Darren

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