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Date: Wed, 4 May 2005 15:32:00 +0100
From: Bruce M Simpson <bms@spc.org>
To: Andre Oppermann <andre@FreeBSD.org>
Message-ID: <20050504143200.GC746@empiric.icir.org>
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Subject: Re: cvs commit: src/sys/netinet tcp_subr.c
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On Wed, May 04, 2005 at 01:48:44PM +0000, Andre Oppermann wrote:
>   Log:
>   If we don't get a suggested MTU during path MTU discovery
>   look up the packet size of the packet that generated the
>   response, step down the MTU by one step through ip_next_mtu()
>   and try again.

Yay! Now I really need to sit down and sort out the gre(4) PMTU story.

Of course a more generic way of doing this might be good, e.g. a generic
PMTU callback for each protocol which needs to exchange this information
with the IP/ICMP layer.

BMS