From mboxrd@z Thu Jan 1 00:00:00 1970 From: zhuyj Subject: Re: How to identify 6to4 and 6in4 tunnels Date: Tue, 28 Jan 2014 15:39:17 +0800 Message-ID: <52E75EA5.4070102@gmail.com> References: <52E63779.5090101@gmail.com> <52E65817.1090904@6wind.com> <52E75D23.10909@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE 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, zhuyj Return-path: Received: from mail-qc0-f169.google.com ([209.85.216.169]:44857 "EHLO mail-qc0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754706AbaA1Hj0 (ORCPT ); Tue, 28 Jan 2014 02:39:26 -0500 In-Reply-To: <52E75D23.10909@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: On 01/28/2014 03:32 PM, zhuyj wrote: > On 01/27/2014 08:59 PM, Nicolas Dichtel wrote: >> Le 27/01/2014 11:39, zhuyj a =E9crit : >>> Hi, Maintainers >>> >>> In our scene, we will create the 6in4/6to4 tunnel firstly and need=20 >>> to check the >>> tunnel type, secondly, we will configure the ip address on it. So,=20 >>> Could we have >>> any way to get the actual tunnel for 6in4 and 6to4 from current=20 >>> linux version? >>> >>> Both 6in4 and 6to4 have the same protocol =93IPPROTO_IPV6=94 in Lin= ux=20 >>> kernel. The >>> only difference is the ip address on the tunnel. Can we distinguish= =20 >>> 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=20 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 tunne= l=20 immediately. After the packets travel through this tunnel, the kernel=20 can identify the type of the tunnel by check_6rd. Is it right? Best Regards! Zhu Yanjun