netdev - [PATCH -next v2 0/2] net: allow setting ecn via routing table

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1414757602-27637-1-git-send-email-fw@strlen.de>
Date:	Fri, 31 Oct 2014 13:13:20 +0100
From:	Florian Westphal <fw@...len.de>
To:	<netdev@...r.kernel.org>
Subject: [PATCH -next v2 0/2] net: allow setting ecn via routing table

Here is the resend of the v1 patchset, as requested.
Thanks again for all the valuable comments and the feedback received for
the original submission.

I did a quick re-test, with a 'feature ecn' route ecn set and tcp_ecn != 1
and the various combinations look ok:

host with ecnroute is initiator
- connect to host with tcp_ecn != 0: connection uses ecn
- connect to host with tcp_ecn == 0: ecn is announced but not used

host with ecnroute is responder:
- connect from host with tcp_ecn == 1: connection uses ecn
- connect from host with tcp_ecn != 1: connection does not uses ecn

original cover letter below:

These two patches allow turning on explicit congestion notification
based on the destination network.

For example, assuming the default tcp_ecn sysctl '2', the following will
enable ecn (tcp_ecn=1 behaviour, i.e. request ecn to be enabled for a
tcp connection) for all connections to hosts inside the 192.168.2/24 network:

ip route change 192.168.2.0/24 dev eth0 features ecn

Having a more fine-grained per-route setting can be beneficial for
various reasons, for example 1) within data centers, or 2) local ISPs
may deploy ECN support for their own video/streaming services [1], etc.

Joint work with Daniel Borkmann, feature suggested by Hannes Frederic Sowa.

The patch to enable this in iproute2 will be posted shortly, it is currently
also available here:
http://git.breakpoint.cc/cgit/fw/iproute2.git/commit/?h=iproute_features&id=8843d2d8973fb81c78a7efe6d42e3a17d739003e

[1] http://www.ietf.org/proceedings/89/slides/slides-89-tsvarea-1.pdf, p.15
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html