netdev - Re: [RFC] The Linux kernel IPv6 stack don't follow the RFC 4942 recommendation

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Date:	Thu, 10 Nov 2011 12:27:25 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	François-Xavier Le Bail <fx.lebail@...oo.com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [RFC] The Linux kernel IPv6 stack don't follow the RFC 4942
 recommendation

Le jeudi 10 novembre 2011 à 02:58 -0800, François-Xavier Le Bail a
écrit :
> ----- Original Message -----
> 
> > From: Eric Dumazet <eric.dumazet@...il.com>
> > To: François-Xavier Le Bail <fx.lebail@...oo.com>
> > Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
> > Sent: Saturday, November 5, 2011 10:30 AM
> > Subject: Re: [RFC] The Linux kernel IPv6 stack don't follow the RFC 4942 recommendation
> > 
> > Le samedi 05 novembre 2011 à 01:39 -0700, François-Xavier Le Bail a
> > écrit :
> > 
> >> 
> >>  I will study and test these options for my application server
> > 
> > Here is a sample of use of the IPv4 part, an udpecho service that use
> > IP_PKTINFO and IP_RECVTOS/IP_TOS to be able to use multihomed machine,
> > and reflect TOS field as well.
> > [. . .]
> 
> Hi,
> 
> I have updated the code for IPv6.
> 
> When a UDP client send to an unicast address on a multihomed Linux 3.0.0 host, from another host, it's OK.
> For example :
> setup 2001::1 on eth0, 2a01::1 on eth1.
> send to 2001::1, recv from 2001::1.
> send to 2a01::1, recv from 2a01::1.
> 
> When the UDP client send to an Subnet-Router anycast address on a multihomed Linux 3.0.0 host, from another host, it's KO.
> send to 2001:: or 2a01::, the udpecho server display "sendmsg: Invalid argument".
> 
> Any idea ?

Could you describe the setup of this machine ?

ip -6 addr
ip -6 ro

...


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