netfilter-devel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: michael-dev <michael-dev@fami-braun.de>
To: netfilter-devel@vger.kernel.org
Subject: nftables matching gratuitous arp
Date: Wed, 21 Aug 2019 21:29:00 +0200	[thread overview]
Message-ID: <c81c933d181adbfdad94057569501d35@fami-braun.de> (raw)

Hi,

I'm trying to match gratuitous arp with nftables. I've tried
> nft add rule bridge filter somechain arp saddr ip == arp daddr ip

but nft (some commits before 0.9.2) says:
> Error: syntax error, unexpected daddr, expecting end of file or newline 
> or semicolon
> add rule bridge filter FORWARD arp saddr ip == arp daddr ip
                                                    ^^^^^
Looking at the description of the netlink protocol, it looks like two 
loads and a cmp of both registers would do it.

Am I'm correct that this is currently not possible with nft, so a patch 
to nft would be needed?

Thanks,
M. Braun

             reply	other threads:[~2019-08-21 19:35 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-21 19:29 michael-dev [this message]
2019-08-21 21:00 ` nftables matching gratuitous arp Florian Westphal

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=c81c933d181adbfdad94057569501d35@fami-braun.de \
    --to=michael-dev@fami-braun.de \
    --cc=netfilter-devel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).