From: Andi Kleen <ak@suse.de>
To: bert hubert <ahu@ds9a.nl>
Cc: netdev@oss.sgi.com
Subject: Re: 2.4.18 userspace seeing UDP packets with bad checksum?
Date: Tue, 30 Jul 2002 14:57:48 +0200 [thread overview]
Message-ID: <20020730145748.A11789@wotan.suse.de> (raw)
In-Reply-To: <20020730104815.GA22307@outpost.ds9a.nl>
On Tue, Jul 30, 2002 at 12:48:15PM +0200, bert hubert wrote:
> I'm under the strong impression that 2.4.18 lets userspace see packets with
> incorrect UDP checksums. The packet attached arrived in userspace after
> travelling all the way from Taiwan.
>
> Is this policy?
Yes. The checksum is checked while doing the copy to user space. When the
checksum fails you still have the already done copy, the kernel does not
try to undo it.
-Andi
prev parent reply other threads:[~2002-07-30 12:57 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-30 10:48 2.4.18 userspace seeing UDP packets with bad checksum? bert hubert
2002-07-30 12:40 ` kuznet
2002-07-30 13:14 ` 3c59x " bert hubert
2002-07-30 13:31 ` kuznet
2002-07-30 13:40 ` jamal
2002-07-30 13:49 ` bert hubert
2002-07-30 14:09 ` Donald Becker
2002-07-30 14:12 ` bert hubert
2002-07-30 13:57 ` Donald Becker
2002-07-31 11:46 ` jamal
2002-07-30 12:57 ` Andi Kleen [this message]
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