linux-kernel - Re: How to identify different ip tunnels

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Date:	Thu, 23 Jan 2014 10:16:08 -0800
From:	Cong Wang <cwang@...pensource.com>
To:	zhuyj <zyjzyj2000@...il.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	netdev <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 different ip tunnels

On Wed, Jan 22, 2014 at 11:33 PM, zhuyj <zyjzyj2000@...il.com> wrote:
> Here are the result that we have got:
>
> Actual Tunnel type ifi->ifi_type
> 4IN4 768
> GRE4 778
> 6IN4/6TO4/ISATAP 776
> 4IN6/6IN6/IPIN6 769
>
> So, we can NOT distinguish the actual tunnel type via ifi_type attribute
> except the GRE4 and 4IN4 tunnel. However we need the actual type. That is
> our question.

Try to search IFLA_IPTUN_PROTO. They are distinguished by protocol.
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