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From: Psyspy 22 <psyspy2020@gmail.com>
To: Florian Westphal <fw@strlen.de>
Cc: netfilter@vger.kernel.org
Subject: Re: libnetfilter_queue: Access conntrack info
Date: Tue, 29 Jun 2021 08:22:23 -0600	[thread overview]
Message-ID: <CAFqmWq-J8zkO8_nHUh=eS_AyhHJ6kAgPiODXu5wKNQM-d7TRLQ@mail.gmail.com> (raw)
In-Reply-To: <20210629063802.GD24271@breakpoint.cc>

Thanks Florian. I added that flag, no dice.

If  I run the libmnl dump example, it successfully prints all
conntrack entries. I would assume all the conntrack related kernel
modules are loaded. I am on 4.1 kernel. I could be missing something.

On Tue, Jun 29, 2021 at 12:38 AM Florian Westphal <fw@strlen.de> wrote:
>
> Psyspy 22 <psyspy2020@gmail.com> wrote:
> > Hello Duncan,
> >
> > I actually need connmark and other conntrack fields like secmark etc.
> > I think attr[NFQA_CT] is the correct way to access it but it's empty
> > in my case.
> > The libnetfilter_queue example sets connmark but doesn't show a way to
> > get connmark from the packet.
>
> IIRC you need to set NFQA_CFG_F_CONNTRACK in NFQA_CFG_FLAGS when setting
> up the queue.  The example only sets F_GSO, so no conntrack info is
> added.

  reply	other threads:[~2021-06-29 14:22 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-28  4:07 libnetfilter_queue: Access conntrack info Psyspy 22
2021-06-29  2:20 ` Duncan Roe
2021-06-29  4:02   ` Psyspy 22
2021-06-29  6:38     ` Florian Westphal
2021-06-29 14:22       ` Psyspy 22 [this message]
2021-06-29 14:38         ` Florian Westphal
2021-07-01 18:13           ` Psyspy 22

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