From: Eric Dumazet <eric.dumazet@gmail.com>
To: David Miller <davem@davemloft.net>
Cc: netdev <netdev@vger.kernel.org>
Subject: Re: [RFC] tcp demux used to signal ip_route_input_noref to not cache dst
Date: Wed, 27 Jun 2012 10:18:24 +0200 [thread overview]
Message-ID: <1340785104.26242.9.camel@edumazet-glaptop> (raw)
In-Reply-To: <1340783533.26242.2.camel@edumazet-glaptop>
On Wed, 2012-06-27 at 09:52 +0200, Eric Dumazet wrote:
> I'll test the following patch in a moment.
>
> For the moment, set nocache to true for all frames not associated to an
> ESTABLISHED socket. Not sure we want to test SYN flag after all.
>
> include/net/protocol.h | 2 +-
> include/net/route.h | 8 ++++----
> include/net/tcp.h | 2 +-
> net/ipv4/arp.c | 2 +-
> net/ipv4/ip_fragment.c | 2 +-
> net/ipv4/ip_input.c | 5 +++--
> net/ipv4/route.c | 8 +++++---
> net/ipv4/tcp_ipv4.c | 4 +++-
> net/ipv4/xfrm4_input.c | 2 +-
> 9 files changed, 20 insertions(+), 15 deletions(-)
Excellent results.
I am now able to resist to DDOS synflood attacks, with no route cache
pollution, and no more rt_garbage_collect() hits.
next prev parent reply other threads:[~2012-06-27 8:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-27 7:19 [RFC] tcp demux used to signal ip_route_input_noref to not cache dst Eric Dumazet
2012-06-27 7:52 ` Eric Dumazet
2012-06-27 8:15 ` David Miller
2012-06-27 8:18 ` Eric Dumazet [this message]
2012-06-27 8:19 ` David Miller
2012-06-27 13:25 ` Hans Schillstrom
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