netdev - Re: How to identify 6to4 and 6in4 tunnels

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Date:	Mon, 27 Jan 2014 13:59:03 +0100
From:	Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:	zhuyj <zyjzyj2000@...il.com>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	kuznet@....inr.ac.ru, jmorris@...ei.org, yoshfuji@...ux-ipv6.org,
	kaber@...sh.net, linux-kernel@...r.kernel.org
Subject: Re: How to identify 6to4 and 6in4 tunnels

Le 27/01/2014 11:39, zhuyj a écrit :
> Hi, Maintainers
>
> In our scene, we will create the 6in4/6to4 tunnel firstly and need to check the
> tunnel type, secondly, we will configure the ip address on it. So, Could we have
> any way to get the actual tunnel for 6in4 and 6to4 from current linux version?
>
> Both 6in4 and 6to4 have the same protocol “IPPROTO_IPV6” in Linux kernel. The
> only difference is the ip address on the tunnel. Can we distinguish them in
> Linux kernel?
Just check the prefix, like it is done in check_6rd().


Regards,
Nicolas
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