Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754651AbaA1HdE (ORCPT ); Tue, 28 Jan 2014 02:33:04 -0500 Received: from mail-qa0-f41.google.com ([209.85.216.41]:60826 "EHLO mail-qa0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750911AbaA1HdC (ORCPT ); Tue, 28 Jan 2014 02:33:02 -0500 Message-ID: <52E75D23.10909@gmail.com> Date: Tue, 28 Jan 2014 15:32:51 +0800 From: zhuyj User-Agent: Mozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: nicolas.dichtel@6wind.com, "David S. Miller" , netdev@vger.kernel.org, kuznet@ms2.inr.ac.ru, jmorris@namei.org, yoshfuji@linux-ipv6.org, kaber@trash.net, linux-kernel@vger.kernel.org Subject: Re: How to identify 6to4 and 6in4 tunnels References: <52E63779.5090101@gmail.com> <52E65817.1090904@6wind.com> In-Reply-To: <52E65817.1090904@6wind.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/27/2014 08:59 PM, Nicolas Dichtel wrote: > Le 27/01/2014 11:39, zhuyj a ?crit : >> 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 > Hi, Nicolas Thanks for your reply. Maybe I can configure 6to4 tunnel by the following commands: ip tunnel add tun6to4 mode sit remote any local 1.202.252.122 ttl 64 ip link set dev tun6to4 up ip -6 addr add 2002:01ca:fc7a::0012:0225:2122/128 dev tun6to4 ip -6 route add 2000::/3 via ::192.88.99.1 dev tun6to4 metric 1 But the kernel can not identify the tunnel is 6to4 tunnel or 6in4 tunnel immediately. After the packets travel through this tunnel, the kernel can identify the type of the tunnel by check_6rd. Is it right? Best Regards! Zhu Yanjun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/