netdev - Re: IPv6-UDP 0x0000 checksum

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Message-ID: <1485444276.5145.133.camel@edumazet-glaptop3.roam.corp.google.com>
Date:   Thu, 26 Jan 2017 07:24:36 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Johannes Berg <johannes@...solutions.net>
Cc:     netdev@...r.kernel.org,
        linux-wireless <linux-wireless@...r.kernel.org>
Subject: Re: IPv6-UDP 0x0000 checksum

On Thu, 2017-01-26 at 15:49 +0100, Johannes Berg wrote:

> Unfortunately, I haven't been able to actually test this yet. I also
> didn't find the code that would drop frames with CSUM 0 either, so I'm
> thinking - for now - that if all the csum handling is skipped, dropping
> 0 csum frames would also be, and then we'd accept a frame we should
> actually have dropped.
> 
> I'll go test this I guess :)
> 
> Any pointers to where 0 csum frames are dropped?

Probably in udp6_csum_init()