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netfilter: ipv6: add IPSKB_REROUTED exclusion to NF_HOOK/POSTROUTING invocation

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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@medozas.de>
Acked-by: David S. Miller <davem@davemloft.net>
[Patrick: changed to use an IP6SKB value instead of IPSKB]
Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Jan Engelhardt 2010-04-13 15:32:16 +02:00 committed by Patrick McHardy
parent 9e50849054
commit 9c6eb28aca
2 changed files with 4 additions and 2 deletions
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1
include/linux/ipv6.h
View File

@ -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))

5
net/ipv6/ip6_output.c
View File

@ -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));
}
/*