Date: Thu, 20 Oct 2011 16:14:51 +0000 From: "Li, Qing" <qing.li@bluecoat.com> To: Fernando Gont <fernando@gont.com.ar>, "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> Cc: FreeBSD Net <freebsd-net@freebsd.org> Subject: RE: IPv6 Redirects & local destinations Message-ID: <B143A8975061C446AD5E29742C531723157DE3@PWSVL-EXCMBX-01.internal.cacheflow.com> In-Reply-To: <4EA04712.3060705@gont.com.ar> References: <4E9FAFCD.3080908@gont.com.ar> <F8470CE2-D5E7-46D6-AF0F-1A85AC1DB21D@lists.zabbadoz.net>, <4EA04712.3060705@gont.com.ar>
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This failure showed up in the IPv6 Ready Logo test suites and I am fixing i=
t.=0A=
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I already made a checkin recently on this front, and more is coming.=0A=
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http://svnweb.freebsd.org/base?view=3Drevision&revision=3D226451=0A=
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I will be posting the test results soon so we know where we are.=0A=
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--Qing=0A=
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________________________________________=0A=
From: owner-freebsd-net@freebsd.org [owner-freebsd-net@freebsd.org] on beha=
lf of Fernando Gont [fernando@gont.com.ar]=0A=
Sent: Thursday, October 20, 2011 9:06 AM=0A=
To: Bjoern A. Zeeb=0A=
Cc: FreeBSD Net=0A=
Subject: Re: IPv6 Redirects & local destinations=0A=
=0A=
Hi, Bjoern,=0A=
=0A=
Thanks so much for your prompt response! PLease find my comments inline...=
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On 10/20/2011 09:19 AM, Bjoern A. Zeeb wrote:=0A=
>> While doing some testing, it seems that FreeBSD ignores ICMPv6 Redirects=
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>> when both the Redirect Destination and the Redirect Target are the same=
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>> (i.e., the destination is supposed to be on-link).=0A=
>>=0A=
>> OTOH, Redirects are processed as expected when the Redirect Target is=0A=
>> different from the Redirect Destination.=0A=
>=0A=
> What does it log if you turn on the following sysctl=0A=
> net.inet6.icmp6.nd6_debug=3D1=0A=
> and reproduce?=0A=
=0A=
Nothing. However, the problem seems to be this: While an entry is added=0A=
in the Neighbor Cache, no host-route is added to the routing table.=0A=
Hence the corresponding entry in the Neighbor Cache is never used.=0A=
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>> Should I report this as a bug, or is this (non-rfc-compliant) behavior=
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>> intentional? (If so, what's the rationale?)=0A=
>=0A=
> It's kern/152791, isn't it?=0A=
=0A=
Yep, it seems it is. -- The fix would be that when an ICMPv6 Redirect is=0A=
received with RD Target =3D=3D RD Destination, not only is an entry create=
d=0A=
in the Neighbor Cache, but a host-route is also created in the routing=0A=
table.=0A=
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Thanks!=0A=
=0A=
Best regards,=0A=
--=0A=
Fernando Gont=0A=
e-mail: fernando@gont.com.ar || fgont@acm.org=0A=
PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1=0A=
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