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Date:	Wed, 23 May 2007 20:01:12 +1000
From:	Herbert Xu <>
To: ("Thomas B. R??cker")
Subject: Re: UDP checksum broken since 2.6.18?

"Thomas B. R??cker" <> wrote:
> Stephen Hemminger wrote:
>> The packet passed to packet capture programs may not have a valid checksum
>> if you have checksum offload configured on the device.  What kind of hardware
>> do you have on sender and receiver? 
> The c-snippet uses 127.x.x.x --> loopback

We never compute the complete checksum for loopback so that explains
the bogus checksum.

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