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Date:	Thu, 15 Jul 2010 17:22:10 +0200
From:	Patrick McHardy <>
To:	"Michael S. Tsirkin" <>
CC:	"Daniel P. Berrange" <>,
	Jes Sorensen <>,
	"David S. Miller" <>,
	Jan Engelhardt <>,
	Randy Dunlap <>,,,,,
Subject: Re: [PATCHv4] netfilter: add CHECKSUM target

Am 15.07.2010 13:52, schrieb Michael S. Tsirkin:
> This adds a `CHECKSUM' target, which can be used in the iptables mangle
> table.
> You can use this target to compute and fill in the checksum in
> a packet that lacks a checksum.  This is particularly useful,
> if you need to work around old applications such as dhcp clients,
> that do not work well with checksum offloads, but don't want to
> disable checksum offload in your device.
> The problem happens in the field with virtualized applications.
> For reference, see Red Hat bz 605555, as well as
> Typical expected use (helps old dhclient binary running in a VM):
> iptables -A POSTROUTING -t mangle -p udp --dport bootpc \
> 	-j CHECKSUM --checksum-fill
> Signed-off-by: Michael S. Tsirkin <>
> Includes fixes by Jan Engelhardt <>

Applied, thanks Michael.
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