From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Fan Du <fan.du@windriver.com>
Cc: steffen.klassert@secunet.com, kaber@trash.net,
netdev@vger.kernel.org, netfilter-devel@vger.kernel.org
Subject: Re: [PATCH net-next] netfilter: add IPComp extension match support
Date: Thu, 5 Dec 2013 19:34:02 +0100 [thread overview]
Message-ID: <20131205183402.GA8949@localhost> (raw)
In-Reply-To: <1385607204-27650-1-git-send-email-fan.du@windriver.com>
Hi,
On Thu, Nov 28, 2013 at 10:53:24AM +0800, Fan Du wrote:
> With this plugin, user could specify IPComp tagged with certain
> CPI that host not interested will be DROPped or any other action.
>
> For example:
> iptables -A INPUT -p 108 -m ipcomp --ipcompspi 0x87 -j DROP
>
> Then input IPComp packet with CPI equates 0x87 will not reach
> upper layer anymore.
I think that, with a little bit more work, you can add support for
IPv6 as well. From RFC 3173:
"In the IPv6 context, IPComp is viewed as an end-to-end payload, and
MUST NOT apply to hop-by-hop, routing, and fragmentation extension
headers.
You can perform that IPv6-specific handling to skip these extension
headers and reach the IPComp header by means of the ipv6_find_hdr()
helper function.
BTW, please post the iptables userspace part as well.
next prev parent reply other threads:[~2013-12-05 18:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-28 2:53 [PATCH net-next] netfilter: add IPComp extension match support Fan Du
2013-12-05 18:34 ` Pablo Neira Ayuso [this message]
2013-12-06 9:56 ` Fan Du
2013-12-07 23:55 ` Pablo Neira Ayuso
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