[Click] click Digest, Vol 95, Issue 6

[shimin sun]

To capture packet at the begining, you should install the patched kernel
modular. Your linux kernel version is too high. I'm a beginner.

2011/5/8 <click-request at pdos.csail.mit.edu>

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> Today's Topics:
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>   1. Patchless kernel click problem (Roman Chertov)
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> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 06 May 2011 09:40:54 -0700
> From: "Roman Chertov" <rchertov at cs.ucsb.edu>
> Subject: [Click] Patchless kernel click problem
> To: <click at pdos.csail.mit.edu>
> Message-ID: <4945763a066bd48d0dab0163900e8231 at www.engr.ucsb.edu>
> Content-Type: text/plain; charset=UTF-8; format=fixed
>
> So I spent some time on the issue I reported earlier with packets being
> visible
> to the kernel IP stack when running kernel level Click.  I have installed a
> plain vanilla kernel 2.6.35.9 on my Fedora14 box, and ran the following
> config.
>
> FromDevice(eth12) -> Print -> Discard;
>
> I have also ran tcpdump -i eth12.  The packets that were sent to the
> machine
> were captured by tcpdump, which definitely should not have happened.  Looks
> like
> the br_handle_frame_hook capture method gets the packets after they get on
> the
> way to the kernel IP stack.  This behavior is definitely not good for some
> kernel level configs as the kernel IP stack should not be involved in
> packet
> processing at all.
>
> By the way, Joonwoo reported the same issue on his Ubuntu setup.
>
> Roman
>
>
>
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> End of click Digest, Vol 95, Issue 6
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