netdev - Re: [BUG] Any-IP IPv6 support broken

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Message-Id: <C98935CD-7723-4903-A4E2-DEB98DCC5912@gmail.com>
Date:	Mon, 2 Nov 2015 10:45:39 -0800
From:	Gilberto Bertin <gilberto.bertin@...il.com>
To:	Maciej Żenczykowski <zenczykowski@...il.com>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	Linux NetDev <netdev@...r.kernel.org>
Subject: Re: [BUG] Any-IP IPv6 support broken

> On 29 Oct 2015, at 17:44, Maciej Żenczykowski <zenczykowski@...il.com> wrote:
> 
> What are you trying to do?

I would like to have a "bind-to-subnet" semantic with IPv6.

This is currently working with IPv4, and the setup is the follow:

- setup a dummy network device configured with any-IP
- add an any-IP route
- bind() on the dummy device

in this way we can effectively bind a process to a particular subnet
(by binding it to a dummy device which is receiving all the packets
from a particular subnet).

The point of using dummy devices is that we can configure multiple ones
(and so we can bind multiple processes to multiple subnets).

> 
> Does what you're trying to do work on an older kernel?  Which kernel
> version does it break at?
> 
> btw. afaik any-ip doesn't work with IPv4 on any un-patched kernel (the
> IPv4 support patch was reverted).

This is actually working with IPv4 (as I said I'm using a recent kernel,
4.1), and the fact that you say it's not supposed to work leads me to
think that maybe we are not talking about the same feature.

Cheers,
	gilberto

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