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Commit 5c29fb12 authored by Hannes Frederic Sowa's avatar Hannes Frederic Sowa Committed by David S. Miller
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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: default avatarRoman Mamedov <rm@romanrm.ru>
Cc: David Miller <davem@davemloft.net>
Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: default avatarHannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: default avatarDavid 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,