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Re: Routing loops & TTL tracking with tunnel devices

From Eric Dumazet <eric.dumazet@gmail.com>
Newsgroups linux.kernel
Subject Re: Routing loops & TTL tracking with tunnel devices
Date 2015-11-16 23:30 +0100
Message-ID <qvArE-4ME-7@gated-at.bofh.it> (permalink)
References <qvypP-3xw-1@gated-at.bofh.it> <qvyJb-3Ft-3@gated-at.bofh.it> <qvz2y-3Mz-7@gated-at.bofh.it>
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On Mon, 2015-11-16 at 21:55 +0100, Jason A. Donenfeld wrote:
> Hi Sowmini,
> 
> Neat. Though, in my case, I'm not actually just prepending a header.
> I'm doing some more substantial transformations of a packet. And this
> needs to work with v4 too. So I'm not sure implementing a v6 spec will
> help with things. I need to identify the right mechanism inside the
> kernel to assist with this, like, say, a member in sk_buff.

There is very little chance we'll accept a new member in sk_buff, unless
proven needed.

Yes, it is very tempting and dozen of programmers already tried.

You'll have to demonstrate full understanding of the stack and why other
solutions do not work.



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Thread

Routing loops & TTL tracking with tunnel devices "Jason A. Donenfeld" <Jason@zx2c4.com> - 2015-11-16 21:20 +0100
  Re: Routing loops & TTL tracking with tunnel devices Sowmini Varadhan <sowmini.varadhan@oracle.com> - 2015-11-16 21:40 +0100
    Re: Routing loops & TTL tracking with tunnel devices "Jason A. Donenfeld" <Jason@zx2c4.com> - 2015-11-16 22:00 +0100
      Re: Routing loops & TTL tracking with tunnel devices Sowmini Varadhan <sowmini.varadhan@oracle.com> - 2015-11-16 22:10 +0100
      Re: Routing loops & TTL tracking with tunnel devices Eric Dumazet <eric.dumazet@gmail.com> - 2015-11-16 23:30 +0100
        Re: Routing loops & TTL tracking with tunnel devices "Jason A. Donenfeld" <Jason@zx2c4.com> - 2015-11-17 03:50 +0100
  Re: Routing loops & TTL tracking with tunnel devices Hannes Frederic Sowa <hannes@stressinduktion.org> - 2015-11-16 23:30 +0100
    Re: Routing loops & TTL tracking with tunnel devices "Jason A. Donenfeld" <Jason@zx2c4.com> - 2015-11-17 04:00 +0100

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