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From: Florian Westphal <fw@strlen.de>
To: Psyspy 22 <psyspy2020@gmail.com>
Cc: netfilter@vger.kernel.org
Subject: Re: libnetfilter_queue: Access conntrack info
Date: Tue, 29 Jun 2021 08:38:02 +0200	[thread overview]
Message-ID: <20210629063802.GD24271@breakpoint.cc> (raw)
In-Reply-To: <CAFqmWq-kOQbjQ=tNWGuk=+yOtuoG98cvRueoT5oK_zNHy8Jfvw@mail.gmail.com>

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  6:38 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 [this message]
2021-06-29 14:22       ` Psyspy 22
2021-06-29 14:38         ` Florian Westphal
2021-07-01 18:13           ` Psyspy 22

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