2005-10-20 04:50:33

by Yan Zheng

Subject: [PATCH]behavior of ip6_route_input() for link local address.

Hi

I find that linux will reply echo request destined to an address which belongs to an interface other than the one from which the request received.
This behavior doesn't make sense for link local address.


Index: net/ipv6/route.c
===================================================================
--- linux-2.6.14-rc4-git6/net/ipv6/route.c 2005-10-20 12:02:49.000000000 +0800
+++ linux/net/ipv6/route.c 2005-10-20 12:21:03.000000000 +0800
@@ -483,7 +483,7 @@
goto out;
}

- rt = rt6_device_match(rt, skb->dev->ifindex, 0);
+ rt = rt6_device_match(rt, skb->dev->ifindex, strict);
BACKTRACK();

if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) {

2005-10-21 08:27:12

by YOSHIFUJI Hideaki

Subject: Re: [PATCH]behavior of ip6_route_input() for link local address.

Hello.

In article <[email protected]> (at Thu, 20 Oct 2005 12:51:34 +0800), Yan Zheng <[email protected]> says:

> I find that linux will reply echo request destined to an address which belongs to an interface other than the one from which the request received.
> This behavior doesn't make sense for link local address.

Acked-by: YOSHIFUJI Hideaki <[email protected]>

Please note that sender does need to setup neighbor
entry by hand to reproduce this bug.
(Link-local address on eth1 is not visible on eth0,
from the point of view of neighbor discovery in IPv6.)

+--------+ +--------+
| sender | | router |
+---+----+ +-+----+-+
|eth0 eth0| |eth1
-----+----------------------+- -+--------------

--
YOSHIFUJI Hideaki @ USAGI Project <[email protected]>
GPG-FP : 9022 65EB 1ECF 3AD1 0BDF 80D8 4807 F894 E062 0EEA