From: "Steinar H. Gunderson" <sgunderson@bigfoot.com>
To: "Rémi Denis-Courmont" <remi@remlab.net>
Cc: netdev@vger.kernel.org
Subject: Re: IPV6_RTHDR with a type-0 routing header
Date: Thu, 20 Aug 2009 14:39:26 +0200 [thread overview]
Message-ID: <20090820123926.GA21858@uio.no> (raw)
In-Reply-To: <20090820121820.GA21354@uio.no>
On Thu, Aug 20, 2009 at 02:18:20PM +0200, Steinar H. Gunderson wrote:
> Hm, OK. And no replacement has been proposed, the deprecation RFC just refers
> to "future routing headers"...
It looks like I can use destination options instead, but those don't seem to
be too easy to use either. The kernel seems to demand that I put eight bytes
of padding at the end?
#define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
Why the +1?
FWIW, the program I try to run is at http://home.samfundet.no/~sesse/v6fun.c .
If I replace "len" in the setsockopt call by "len + 8", the program runs and
the packets get the right option attached -- but also eight padding bytes.
/* Steinar */
--
Homepage: http://www.sesse.net/
next prev parent reply other threads:[~2009-08-20 12:39 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-20 11:11 IPV6_RTHDR with a type-0 routing header Steinar H. Gunderson
2009-08-20 11:29 ` Jens Rosenboom
2009-08-20 11:29 ` Rémi Denis-Courmont
2009-08-20 12:18 ` Steinar H. Gunderson
2009-08-20 12:39 ` Steinar H. Gunderson [this message]
2009-08-20 12:53 ` Jens Rosenboom
2009-08-20 13:00 ` Steinar H. Gunderson
2009-08-20 13:11 ` Steinar H. Gunderson
2009-08-21 1:09 ` Shan Wei
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