Commit 5c29fb12 authored Jun 27, 2013 by Hannes Frederic Sowa Committed by David S. Miller Jul 01, 2013

ipv6: only apply anti-spoofing checks to not-pointopoint tunnels



Because of commit 218774dc ("ipv6: add
anti-spoofing checks for 6to4 and 6rd") the sit driver dropped packets
for 2002::/16 destinations and sources even when configured to work as a
tunnel with fixed endpoint. We may only apply the 6rd/6to4 anti-spoofing
checks if the device is not in pointopoint mode.

This was an oversight from me in the above commit, sorry.  Thanks to
Roman Mamedov for reporting this!

Reported-by: Roman Mamedov <rm@romanrm.ru>
Cc: David Miller <davem@davemloft.net>
Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent e62bc9e5

net/ipv6/sit.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -593,7 +593,7 @@ static int ipip6_rcv(struct sk_buff *skb)
		tunnel->dev->stats.rx_errors++;
		goto out;
		}
		} else {
		} else if (!(tunnel->dev->flags&IFF_POINTOPOINT)) {
		if (is_spoofed_6rd(tunnel, iph->saddr,
		&ipv6_hdr(skb)->saddr) \|\|
		is_spoofed_6rd(tunnel, iph->daddr,

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