From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Florian Westphal <fw@strlen.de>
Cc: netfilter-devel@vger.kernel.org
Subject: Re: [PATCH] netfilter: nf_queue: add NFQA_SKB_CSUM_NOTVERIFIED info flag
Date: Sat, 29 Jun 2013 14:45:19 +0200 [thread overview]
Message-ID: <20130629124519.GA24256@localhost> (raw)
In-Reply-To: <1369601289-12743-1-git-send-email-fw@strlen.de>
Hi Florian,
On Sun, May 26, 2013 at 10:48:09PM +0200, Florian Westphal wrote:
> The common case is that TCP/IP checksums have already been
> verified, e.g. by hardware (rx checksum offload), or conntrack.
>
> Userspace can use this flag to determine when the checksum
> has not been validated yet.
>
> If the flag is set, this doesn't necessarily mean that the packet has
> an invalid checksum, e.g. if NIC doesn't support rx checksum.
>
> Userspace that sucessfully enabled NFQA_CFG_F_GSO queue feature flag can
> infer that IP/TCP checksum has already been validated if either the
> SKB_INFO attribute is not present or the NFQA_SKB_CSUM_NOTVERIFIED
> flag is unset.
I have applied this patch to nf-next, thanks.
next prev parent reply other threads:[~2013-06-29 12:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-26 20:48 nfqueue: detect when packet has already been checksummed? Florian Westphal
2013-05-26 20:48 ` [PATCH] netfilter: nf_queue: add NFQA_SKB_CSUM_NOTVERIFIED info flag Florian Westphal
2013-06-29 12:45 ` Pablo Neira Ayuso [this message]
2013-05-29 11:14 ` nfqueue: detect when packet has already been checksummed? Pablo Neira Ayuso
2013-05-29 11:25 ` Florian Westphal
2013-05-29 11:57 ` Pablo Neira Ayuso
2013-05-29 12:03 ` Florian Westphal
2013-05-29 12:23 ` Pablo Neira Ayuso
2013-05-29 13:25 ` Florian Westphal
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