netdev - loopback interface - why checksum on header?

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Message-ID: <4E2AF71A.6080703@inria.fr>
Date:	Sat, 23 Jul 2011 18:30:18 +0200
From:	Pierre Louis Aublin <pierre-louis.aublin@...ia.fr>
To:	netdev@...r.kernel.org
Subject: loopback interface - why checksum on header?

Hello everybody

I am wondering why the checksum of packets sent through the loopback 
interface is computed on the header only.
If I understand correctly, it is assumed that a message cannot be 
corrupted in RAM, thus there is no need to verify the integrity of the 
whole message.
However, in that case, there is also no need to compute it on the header.
Consequently, why is it not the case?

Thank you in advance
Pierre Louis Aublin
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