From: Pablo Neira Ayuso <pablo@netfilter.org>
To: valentina.giusti@bmw-carit.de
Cc: netfilter-devel@vger.kernel.org,
Patrick McHardy <kaber@trash.net>,
Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH] xt_owner: enable xt_owner on INPUT chain
Date: Wed, 4 Sep 2013 14:34:59 +0200 [thread overview]
Message-ID: <20130904123459.GA4900@localhost> (raw)
In-Reply-To: <1377866623-25948-2-git-send-email-valentina.giusti@bmw-carit.de>
On Fri, Aug 30, 2013 at 02:43:43PM +0200, valentina.giusti@bmw-carit.de wrote:
> From: Valentina Giusti <valentina.giusti@bmw-carit.de>
>
> Since (41063e9 ipv4: Early TCP socket demux), we can apply the owner
> extension on the INPUT chain and match established TCP sockets.
> However, because of the same commit, we can have skb->sk pointing to a
> timewait socket, in which case accessing skb->sk->sk_socket is invalid.
This only works for established TCP sockets. Thus, this rule:
-A INPUT -m owner --socket-exists -j ACCEPT
-A OUTPUT -m owner --socket-exists -j ACCEPT
are semantically different depending on the path.
next prev parent reply other threads:[~2013-09-04 12:35 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-30 12:43 [PATCH] [RFC] xt_owner: enable xt_owner on INPUT chain valentina.giusti
2013-08-30 12:43 ` [PATCH] " valentina.giusti
2013-09-04 12:34 ` Pablo Neira Ayuso [this message]
2013-09-04 12:58 ` Valentina Giusti
2013-08-30 14:54 ` [PATCH] [RFC] " Phil Oester
2013-08-30 15:08 ` 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=20130904123459.GA4900@localhost \
--to=pablo@netfilter.org \
--cc=davem@davemloft.net \
--cc=kaber@trash.net \
--cc=kadlec@blackhole.kfki.hu \
--cc=netfilter-devel@vger.kernel.org \
--cc=valentina.giusti@bmw-carit.de \
/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).