netdev - Re: masquerading AFTER first packet

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Message-ID: <20210905083939.GH3350910@belle.intranet.vanheusden.com>
Date:   Sun, 5 Sep 2021 10:39:40 +0200
From:   folkert <folkert@...heusden.com>
To:     Florian Westphal <fw@...len.de>
Cc:     netdev@...r.kernel.org
Subject: Re: masquerading AFTER first packet

> So conclusion: my IP-stack *may* be producing incorrect checksums, or
> Linux or tcpdump and wireshark may be incorrectly evaluating them?

I'm sceptical about the incorrect checksum hypothesis.

That would be wireshark, tcpdump, my own ip-stack and a quick python-
script that verifies checksums all disagreeing with the kernel in this
specific case.

https://github.com/folkertvanheusden/MyIP/blob/master/netverify.py