From 4fddbf5d7854b0a615c6481988895016f5d038d2 Mon Sep 17 00:00:00 2001
From: Sascha Hlusiak <contact@saschahlusiak.de>
Date: Tue, 19 May 2009 12:56:49 +0000
Subject: [PATCH] sit: strictly restrict incoming traffic to tunnel link device

Check link device when looking up a tunnel. When a tunnel is
linked to a interface, traffic from a different interface must not
reach the tunnel.

This also allows creating of multiple tunnels with the same
endpoints, if the link device differs.

Signed-off-by: Sascha Hlusiak <contact@saschahlusiak.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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