From: David Miller <davem@davemloft.net>
To: jengelh@medozas.de
Cc: netdev@vger.kernel.org, cooldavid@cooldavid.org
Subject: Re: jme: UDP checksum error, and lots of them
Date: Wed, 01 Dec 2010 20:09:35 -0800 (PST) [thread overview]
Message-ID: <20101201.200935.71110482.davem@davemloft.net> (raw)
In-Reply-To: <alpine.LNX.2.01.1012020430190.4157@obet.zrqbmnf.qr>
From: Jan Engelhardt <jengelh@medozas.de>
Date: Thu, 2 Dec 2010 04:39:34 +0100 (CET)
> Why does the JME driver care so much about this that it needs to print
> this for every packet? It does not look like it has any offloading
> features.
Well I'm glad it let us know about the bad checksum which would otherwise
have been unnoticed.
Please try to pinpoint why the checksum is bad, because it seems that
tcpdump agrees with the driver. Perhaps it's some side effect of how
vpnc uses TUN/TAP, or something like that.
Seeing the bad checksum even in tcpdump, and then seeing proper replies
going back, that is very suspicious and should be looked into.
next prev parent reply other threads:[~2010-12-02 4:09 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-02 3:39 jme: UDP checksum error, and lots of them Jan Engelhardt
2010-12-02 3:53 ` Guo-Fu Tseng
2010-12-02 4:09 ` David Miller [this message]
2010-12-02 4:33 ` Guo-Fu Tseng
2010-12-02 5:59 ` David Miller
2010-12-02 23:15 ` Francois Romieu
2010-12-02 23:54 ` Jan Engelhardt
2010-12-03 23:02 ` Francois Romieu
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