netdev - Re: [PATCH v5 net-next 3/3] udp6: Use Segment Routing Header for dest address if present

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Date:   Mon, 3 Jan 2022 10:35:07 -0700
From:   David Ahern <dsahern@...il.com>
To:     Andrew Lunn <andrew@...n.ch>, David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Ahern <dsahern@...nel.org>,
        Willem de Bruijn <willemb@...gle.com>,
        James Prestwood <prestwoj@...il.com>,
        Justin Iurman <justin.iurman@...ege.be>,
        Praveen Chaudhary <praveen5582@...il.com>,
        "Jason A . Donenfeld" <Jason@...c4.com>,
        Eric Dumazet <edumazet@...gle.com>,
        netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH v5 net-next 3/3] udp6: Use Segment Routing Header for dest
 address if present

On 1/3/22 10:11 AM, Andrew Lunn wrote:
> When finding the socket to report an error on, if the invoking packet
> is using Segment Routing, the IPv6 destination address is that of an
> intermediate router, not the end destination. Extract the ultimate
> destination address from the segment address.
> 
> This change allows traceroute to function in the presence of Segment
> Routing.
> 
> Signed-off-by: Andrew Lunn <andrew@...n.ch>
> ---
>  include/net/seg6.h | 19 +++++++++++++++++++
>  net/ipv6/udp.c     |  3 ++-
>  2 files changed, 21 insertions(+), 1 deletion(-)
> 

Reviewed-by: David Ahern <dsahern@...nel.org>