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[NETFILTER]: Fix xfrm lookup in ip_route_me_harder/ip6_route_me_harder

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ip_route_me_harder doesn't use the port numbers of the xfrm lookup and
uses ip_route_input for non-local addresses which doesn't do a xfrm
lookup, ip6_route_me_harder doesn't do a xfrm lookup at all.

Use xfrm_decode_session and do the lookup manually, make sure both
only do the lookup if the packet hasn't been transformed already.

Makeing sure the lookup only happens once needs a new field in the
IP6CB, which exceeds the size of skb->cb. The size of skb->cb is
increased to 48b. Apparently the IPv6 mobile extensions need some
more room anyway.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy
2006-01-06 23:04:54 -08:00
committed by David S. Miller
parent 8cdfab8a43
commit 3e3850e989
11 changed files with 34 additions and 12 deletions
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3
include/linux/ipv6.h
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@ -192,6 +192,9 @@ struct inet6_skb_parm {
__u16 dst1;
__u16 lastopt;
__u32 nhoff;
__u16 flags;
#define IP6SKB_XFRM_TRANSFORMED 1
};
#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))