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Message-Id: <0977189F-9778-4D1C-939D-FAD71595E5F6@gmail.com>
Date:	Thu, 29 Oct 2015 15:00:26 +0000
From:	Gilberto Bertin <gilberto.bertin@...il.com>
To:	netdev@...r.kernel.org
Subject: [BUG] Any-IP IPv6 support broken

Hello,
testing Any-IP on my machine, I noticed that it's not working with IPv6
addresses.
Tests are performed on a 4.1 kernel.

Steps to reproduce the bug:

1- make sure Any-IP is working with IPv4 addresses:

# ip -4 route add local 4.4.4.0/24 dev eth0

with this command every packets with an IP in the subnet 4.4.4.0/24 will
be delivered to the eth0 interface.
We can test this:

$ ping 4.4.4.1 -c 1 | grep received
1 packets transmitted, 1 received, 0% packet loss, time 0ms
$ ping 4.4.4.50 -c 1 | grep received
1 packets transmitted, 1 received, 0% packet loss, time 0ms
$ ping 4.4.4.200 -c 1 | grep received
1 packets transmitted, 1 received, 0% packet loss, time 0ms

2- note that it's not actually working with IPv6 addresses:

# ip -6 route add local abcd:abcd:abcd:abcd::/64 dev eth0

$ ping6 -c 1 abcd:abcd:abcd:abcd::1 | grep received
1 packets transmitted, 0 received, 100% packet loss, time 0ms
$ ping6 -c 1 abcd:abcd:abcd:abcd::50 | grep received
1 packets transmitted, 0 received, 100% packet loss, time 0ms
$ ping6 -c 1 abcd:abcd:abcd:abcd::100 | grep received
1 packets transmitted, 0 received, 100% packet loss, time 0ms

Since the kernel should support Any-IP with IPv6 addresses (the patch
was submitted/accepted years ago [1]) I suspect this is a bug.

Even trying with the commands suggested by the patch [1]:
# ip -6 rule  add from all iif eth0 lookup 200
# ip -6 route add local default dev lo table 200

I was not able to get it working.


Thank you.

[1] http://www.spinics.net/lists/netdev/msg141994.html

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