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Date:	Sat, 24 Nov 2007 14:00:41 +0800
From:	Herbert Xu <>
Subject: Re: [RFC/PATCH] SO_NO_CHECK for IPv6

David Schwartz <> wrote:
>> Regardless of whatever verifications your application is doing
>> on the data, it is not checksumming the ports and that's what
>> the pseudo-header is helping with.
> So what? We are in the case where the data has already gotten to him. If it
> got to him in error, he'll reject it anyway. The receive checksum check will
> only reject packets that he would reject anyway. That makes it needless.

What if it goes to the wrong recipient who doesn't have the upper-
level checksums?

This is the whole point, IPv6 unlike IPv4 does not have IP header
checksums so the high-level needs to protect it by checksumming
the pseudo-header.

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