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 id 1XFLX9-0004Cg-8H; Thu, 07 Aug 2014 13:06:59 +0200
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Date: Thu, 07 Aug 2014 07:06:15 -0400
From: Fernando Gont <fernando@gont.com.ar>
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To: Hiroki Sato <hrs@FreeBSD.org>
Subject: Re: Routing IPv6 packets towards oneself with routing sockets?
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Hi, Hiroki,

On 08/07/2014 06:24 AM, Hiroki Sato wrote:
> 
> Fernando Gont <fernando@gont.com.ar> wrote
>   in <53E2B586.3080700@gont.com.ar>:
> 
> fe> However, whenever I lookup an entry for fc00:1::1 with routing sockets,
> fe> the only entry I obtain is fc00:1::/64 (a network route) rather than
> fe> fc00:1::1/128 (a host route). As a result, I kind of have to figure out
> fe> that since fc00:1::1 is my own address, I must override whatever I
> fe> learned via routing sockets, and just send my packets to loopback.
> fe>
> fe> I would assume that I must be doing something wrong, since I would
> fe> expect the host-specific route (i.e. longest-matching route) to be route
> fe> learned via routing sockets. And that I shouldn't be implementing this
> fe> "is the dst address my own address?" hack.
> fe>
> fe> Any thoughts?
> fe>
> fe> P.S.: I can provide a code snippet if that'd be of any help.
> 
>  RTM_GET should return fc00:1::1/128 with ifp == lo0. 

Yes, that's what I would have expected.


>  Can you show
>  the code you are using?

Yes: <https://github.com/fgont/snippets/raw/master/bsd-lookup-simple.c>

Run it as:
bsd-lookup-simple -v IPV6_DEST_ADDR

(or without the "-v" if you don't want much verbosity)

Thanks!

Best regards,
-- 
Fernando Gont
e-mail: fernando@gont.com.ar || fgont@si6networks.com
PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1