From: Jeff Garzik <jeff@garzik.org>
To: "YOSHIFUJI Hideaki / 吉藤英明" <yoshfuji@linux-ipv6.org>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Herbert Xu <herbert@gondor.apana.org.au>,
David Miller <davem@davemloft.net>
Subject: Re: [RFC/PATCH] SO_NO_CHECK for IPv6
Date: Wed, 21 Nov 2007 19:17:40 -0500 [thread overview]
Message-ID: <4744CAA4.50102@garzik.org> (raw)
In-Reply-To: <20071121.222051.94402865.yoshfuji@linux-ipv6.org>
YOSHIFUJI Hideaki / 吉藤英明 wrote:
> In article <20071121124532.GA17263@havoc.gtf.org> (at Wed, 21 Nov 2007 07:45:32 -0500), Jeff Garzik <jeff@garzik.org> says:
>
>> SO_NO_CHECK support for IPv6 appeared to be missing. This is presented,
>> based on a reading of net/ipv4/udp.c.
>
> Disagree. UDP checksum is mandatory in IPv6.
Ah, you mean that I need to turn off UDP checksum on receive end as well
in IPv6... true.
For those interested, I am dealing with a UDP app that already does very
strong checksumming and encryption, so additional software checksumming
at the lower layers is quite simply a waste of CPU cycles. Hardware
checksumming is fine, as long as its "free."
Jeff
next prev parent reply other threads:[~2007-11-22 0:18 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-21 12:45 Jeff Garzik
2007-11-21 13:20 ` YOSHIFUJI Hideaki / 吉藤英明
2007-11-21 13:42 ` Herbert Xu
2007-11-22 0:17 ` Jeff Garzik [this message]
2007-11-22 2:34 ` Herbert Xu
2007-11-22 2:46 ` YOSHIFUJI Hideaki / 吉藤英明
2007-11-23 1:13 ` David Miller
2007-11-23 6:06 ` David Schwartz
2007-11-24 6:00 ` Herbert Xu
2007-11-25 15:41 ` David Schwartz
2007-11-26 2:47 ` Herbert Xu
2007-11-21 18:35 ` David Miller
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