connection tracker - ipv6 extension headers

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Hello everybody,

I'm quite new to netfilter, so be kind with me... :-)

In the case of my Master Thesis I have to develop shim6-support in netfilter.

I found that there is no real support in the netfilter connection tracker to 
handle IPv6 extension headers. (e.g.: when I receive a shim6-payload extension 
header, I would like to check if the context-tag is a valid one for the 
locators used. - shim6-control messages will be handled like a layer-4 
protocol as in icmp6)

I thought, that I could do that job in nf_ct_ipv6_skip_exthdr(...) to check if 
the context-tag is valid. But it's not the job of that function to check the 
"validness" of an extension header.

So, are there any plans to implement some kind of extension-header-handler in 
the connection tracker? Or does there exists somewhere a patch who does that 
job?

I hope, that I was clear in my explanations.

Thanks for helping me,

--
Christoph Paasch

École Polytechnique de Louvain-la-Neuve
Département d'ingénierie informatique

www.rollerbulls.be
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