From: Jan Engelhardt <jengelh@xxxxxxxxxx>
Similar to how IPv4's ip_output.c works, have ip6_output also check
the IPSKB_REROUTED flag. It will be set from xt_TEE for cloned packets
since Xtables can currently only deal with a single packet in flight
at a time.
Signed-off-by: Jan Engelhardt <jengelh@xxxxxxxxxx>
Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>
[Patrick: changed to use an IP6SKB value instead of IPSKB]
Signed-off-by: Patrick McHardy <kaber@xxxxxxxxx>
---
include/linux/ipv6.h | 1 +
net/ipv6/ip6_output.c | 5 +++--
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index e0cc9a7..7bdf6ff 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -250,6 +250,7 @@ struct inet6_skb_parm {
#define IP6SKB_XFRM_TRANSFORMED 1
#define IP6SKB_FORWARDED 2
+#define IP6SKB_REROUTED 4
};
#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 236ac78..c10a38a 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -172,8 +172,9 @@ int ip6_output(struct sk_buff *skb)
return 0;
}
- return NF_HOOK(NFPROTO_IPV6, NF_INET_POST_ROUTING, skb, NULL, dev,
- ip6_finish_output);
+ return NF_HOOK_COND(NFPROTO_IPV6, NF_INET_POST_ROUTING, skb, NULL, dev,
+ ip6_finish_output,
+ !(IP6CB(skb)->flags & IP6SKB_REROUTED));
}
/*
--
1.7.0.4
--
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