From: David Miller <davem@davemloft.net>
To: herbert@gondor.apana.org.au
Cc: dpn@isomerica.net, toralf.foerster@gmx.de, netdev@vger.kernel.org
Subject: Re: tx-checksumming for an Intel Corporation 82540EP Gigabit Ethernet Controller (Mobile)
Date: Sun, 20 Apr 2008 21:24:51 -0700 (PDT) [thread overview]
Message-ID: <20080420.212451.10825959.davem@davemloft.net> (raw)
In-Reply-To: <E1Jnn9e-0001tP-00@gondolin.me.apana.org.au>
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Mon, 21 Apr 2008 11:57:22 +0800
> Daniel Noe <dpn@isomerica.net> wrote:
> >
> > 2) Tell Wireshark not to verify the checksums. See
> > http://wiki.wireshark.org/TCP_Checksum_Verification. This works if you
> > don't really care about the checksums and are looking at other things.
> > If you suspect incorrect checksums, you can always turn off checksum
> > offloading manually.
>
> Better yet fix Wireshark to use the info that the kernel supplies
> and ignore checksums only on those packets generated locally for
> hardware offload.
True.
But every time we say this they keep coming back at us that they can't
change the tcpdump raw dump file format that's been used for
centuries, and naturally it was designed without any extensibility in
mind so there's nowhere to store the checksum indication.
next prev parent reply other threads:[~2008-04-21 4:24 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-27 10:44 tx-checksumming for an Intel Corporation 82540EP Gigabit Ethernet Controller (Mobile) Toralf Förster
2008-03-27 11:01 ` David Miller
2008-03-27 12:00 ` Daniel Noe
2008-03-27 12:14 ` Toralf Förster
2008-04-21 3:57 ` Herbert Xu
2008-04-21 4:24 ` David Miller [this message]
2008-04-21 4:50 ` Herbert Xu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080420.212451.10825959.davem@davemloft.net \
--to=davem@davemloft.net \
--cc=dpn@isomerica.net \
--cc=herbert@gondor.apana.org.au \
--cc=netdev@vger.kernel.org \
--cc=toralf.foerster@gmx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).