From: "U.Mutlu" <for-gmane@mutluit.com>
To: netfilter-devel@vger.kernel.org
Subject: Re: [libnetfilter_queue] extra data after payload
Date: Fri, 23 Sep 2011 19:02:57 +0200 [thread overview]
Message-ID: <j5ie42$f7k$1@dough.gmane.org> (raw)
In-Reply-To: <j5ibim$sen$1@dough.gmane.org>
U.Mutlu wrote, On 2011-09-23 18:19:
> Hi,
>
> when reading queue data via the recv() function
> then one gets a return value much longer than the payload data,
> so there are some extra data after the payload.
> What kind of extra data is it?
>
> for example:
> rv = recv(fd, buf, sizeof(buf), 0); // rv=84
> ...
> ret = nfq_get_payload(tb, &data); // ret=40 (ie. ip + tcp pkt, both w/o options, and tcp w/o user data)
>
> So, here, what are the extra 44 bytes after the tcp data?
Correction: the extra data is in front of the payload.
next prev parent reply other threads:[~2011-09-23 17:03 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-23 16:19 [libnetfilter_queue] extra data after payload U.Mutlu
2011-09-23 17:02 ` U.Mutlu [this message]
2011-09-23 17:17 ` Jeff Haran
2011-09-24 8:08 ` U.Mutlu
2011-09-24 8:24 ` Jan Engelhardt
2011-09-26 17:45 ` Jeff Haran
2011-09-26 18:58 ` U.Mutlu
2011-09-26 20:22 ` U.Mutlu
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