netdev - Re: [NET]: Allow forwarding of ip_summed except CHECKSUM

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Message-ID: <20070327212003.GA30862@gondor.apana.org.au>
Date:	Wed, 28 Mar 2007 07:20:03 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Patrick McHardy <kaber@...sh.net>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Stephen Hemminger <shemminger@...ux-foundation.org>,
	netdev@...r.kernel.org
Subject: Re: [NET]: Allow forwarding of ip_summed except CHECKSUM_COMPLETE

On Tue, Mar 27, 2007 at 10:51:53PM +0200, Patrick McHardy wrote:
> 
> Just wondering, how does Xen know whether a packet will be forwarded?

It's up to Linux to handle it correctly.

> The input path doesn't seem to deal with CHECKSUM_PARTIAL correctly,
> ip_defrag for example resets them to CHECKSUM_NONE, so further checks
> will fail, others seem to either ignore them or handle them together
> with CHECKSUM_NONE.

That's OK, Linux/Xen never generates any CHECKSUM_PARTIAL fragments.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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