From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Raul Martinez <mraul@qti.qualcomm.com>
Cc: "netfilter@vger.kernel.org" <netfilter@vger.kernel.org>
Subject: Re: Possible nftables U32 equivalent to read packet's data contents
Date: Mon, 4 Sep 2017 22:55:21 +0200 [thread overview]
Message-ID: <20170904205521.GA14891@salvia> (raw)
In-Reply-To: <c57ba9690f0d4ec680ce16599e8b15da@nalasexr02h.na.qualcomm.com>
Hi Raul,
On Fri, Sep 01, 2017 at 04:39:35PM +0000, Raul Martinez wrote:
> Hi Pablo,
>
> Ultimately my use would be to read the first byte of a ESP IP
> packet's data payload. So IP layer is where I would want the
> expression to work in.
>
> The packets I am working with are identical and need to be
> routed to one of two interfaces based on if the first byte of
> the data contents is non-zero.
OK, so it's just an arbitrary byte. Not anything in a standard header
that needs to be matched.
I'm asking because we could add the protocol definition for what you
need, so we don't need to use raw expressions.
next prev parent reply other threads:[~2017-09-04 20:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-30 21:59 Possible nftables U32 equivalent to read packet's data contents Raul Martinez
2017-09-01 10:30 ` Pablo Neira Ayuso
2017-09-01 16:39 ` Raul Martinez
2017-09-04 20:55 ` Pablo Neira Ayuso [this message]
2017-09-05 17:04 ` Raul Martinez
2017-10-03 13:34 ` Pablo Neira Ayuso
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