Date: Tue, 29 Jul 2014 20:57:13 +0200
From: Gert Doering <gert@...1296...>
Message-ID: <20140729185713.GX1118@...1296...>
References: <1406654929-6079-1-git-send-email-jm@...1926...>
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In-Reply-To: <1406654929-6079-1-git-send-email-jm@...1926...>
Subject: Re: [Openvpn-devel] [PATCH] Fix --mtu-disc option with IPv6
	transport
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To: Julien Muchembled <jm@...1926...>
Cc: openvpn-devel@lists.sourceforge.net

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Hi,

On Tue, Jul 29, 2014 at 07:28:49PM +0200, Julien Muchembled wrote:
> Socket configuration of MTU discovery was done unconditionally at IP leve=
l,
> which has no effect for other protocols. This fixes the issue of OpenVPN
> sending fragmented tcp6/udp6 packets even when 'mtu-disc yes' option is p=
assed.

Sounds good.  I'm not sure I understand what that socket option *does*,
though...  will it make the kernel report back any ICMP packet too big
messages received?  Or will it not honour those unless IPV6_MTU_DISCOVER
is set?

Is there documentation for that socket option somewhere?

(Last not least, because I'm too lazy to look: is that patch against
git master or against release/2.3?)

gert
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Gert Doering - Munich, Germany                             gert@...1296...
fax: +49-89-35655025                        gert@...1297...

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