From owner-freebsd-net  Thu May 23 19:21:44 2002
Delivered-To: freebsd-net@freebsd.org
Received: from hall.mail.mindspring.net (hall.mail.mindspring.net [207.69.200.60])
	by hub.freebsd.org (Postfix) with ESMTP
	id 2121C37B40B; Thu, 23 May 2002 19:21:39 -0700 (PDT)
Received: from user-1121rtu.dsl.mindspring.com ([66.32.239.190] helo=compaq)
	by hall.mail.mindspring.net with smtp (Exim 3.33 #1)
	id 17B4hx-0001Gf-00; Thu, 23 May 2002 22:21:33 -0400
Message-ID: <000f01c202c9$028d6c60$5ab9fea9@compaq>
From: "Naga Narayanaswamy" <naga@mindspring.com>
To: "Rob" <telez@brown.edu>, <freebsd-net@FreeBSD.ORG>
Cc: <hackers@FreeBSD.ORG>
References: <20020522202839.A3413@lester.manchero.org> <20020523202222.A6200@lester.manchero.org>
Subject: Re: ip src address in outgoing ipv4 multicast packets
Date: Thu, 23 May 2002 22:16:26 -0400
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2600.0000
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000
Sender: owner-freebsd-net@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-net.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-net>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-net>
X-Loop: FreeBSD.org


In my 4.6-RC system, I do not have problems with RIPv2
and OSPFv2 packets. I tried zebra routing daemon just now and
RIP multicast packets with 224.0.0.9 have proper source address
of the interface originating them and OSPFv2 HELLO multicast
packets with dst 224.0.0.5 have proper src address of the interface
originating them.

When you say src address is set to host group, what application generates
them? What is the src and  dest address ? I quickly checked Rich Stevens vol
II.
Looks like the code has been like this since old days.
Is the application setting the src address as mc group intentionally?

Regards
Naga.


----- Original Message -----
From: "Rob" <telez@brown.edu>
To: <freebsd-net@FreeBSD.ORG>
Cc: <hackers@FreeBSD.ORG>
Sent: Thursday, May 23, 2002 8:22 PM
Subject: Re: ip src address in outgoing ipv4 multicast packets


> * Rob (telez@brown.edu) [020522 20:30]:
> > I was just wondering why the src address is set to the host group in
> > outgoing multicast packets on RELENG_4?  As far as I can tell, rfc1054
> > says that the src address should be set to that of the host, not the
> > host group (6.2).  The behavior exists in 4.5-release also.
> >
> > I noticed this because linux seems to reject mc packets with a multicast
> > source address  (which is also incorrect according to section 7.2).
> >
> > Looking at the source, it seems trivial to get the correct (?) behavior.
> > Is there some reason why we shouldn't do this?
>
>
> If anyone cares I just submitted a pr with an attached patch which will
> fix this problem.  What is a good avenue to get this incorporated into
> the main tree?
>
> http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/38473
>
> -r
>
> To Unsubscribe: send mail to majordomo@FreeBSD.org
> with "unsubscribe freebsd-net" in the body of the message


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-net" in the body of the message