Re: Scanning IP6 packets

[Michael Richardson <mcr () sandelman ca>]

Darren Reed <darrenr () netbsd org> wrote:
    >> That's cool...
    >>
    >> > that are chained together in this fashion. In its current form, BPF
    >> (v1) is > not that IPv6 friendly. Give me a week or two to back up a
    >> design with some > code that works (the parser and compiler bit are
    >> the tricky pieces.)
    >>
    >> True. I assume you are adding kind of limited loop capability.  Could
    >> it be unrolled to some depth to work with BPFv1?

    > No. For analysing IPv6 you don't need loops, rather you need some much
    > more complex instructions than BPF's RISC design has at present.  Key
    > to that are "find header number X" or "what is the last header" as

okay, I would call these "limited loops", in that they can only iterate
through the packet under specific conditions :-)

Thank you for working on this.
Getting new BPF code widely deployed won't be easy.

--
]               Never tell me the odds!                 | ipv6 mesh networks [
]   Michael Richardson, Sandelman Software Works        | network architect  [
]     mcr () sandelman ca  http://www.sandelman.ca/        |   ruby on rails    [



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