From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Florian Westphal <fw@strlen.de>
Cc: netfilter-devel@vger.kernel.org
Subject: Re: [PATCH v2 nf-next] netfilter: exthdr: add support for tcp option removal
Date: Fri, 4 Feb 2022 06:19:30 +0100 [thread overview]
Message-ID: <Yfy3Ygk75CD80r2N@salvia> (raw)
In-Reply-To: <20220128120036.13449-1-fw@strlen.de>
On Fri, Jan 28, 2022 at 01:00:36PM +0100, Florian Westphal wrote:
> This allows to replace a tcp option with nop padding to selectively disable
> a particular tcp option.
>
> Optstrip mode is chosen when userspace passes the exthdr expression with
> neither a source nor a destination register attribute.
>
> This is identical to xtables TCPOPTSTRIP extension.
> The only difference is that TCPOPTSTRIP allows to pass in a bitmap
> of options to remove rather than a single number.
>
> Unlike TCPOPTSTRIP this expression can be used multiple times
> in the same rule to get the same effect.
>
> We could add a new nested attribute later on in case there is a
> use case for single-expression-multi-remove.
Also applied, thanks
prev parent reply other threads:[~2022-02-04 5:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-28 12:00 [PATCH v2 nf-next] netfilter: exthdr: add support for tcp option removal Florian Westphal
2022-02-04 5:19 ` Pablo Neira Ayuso [this message]
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