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netfilter: nf_tables: rt: allow checking if dst has xfrm attached

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Useful e.g. to avoid NATting inner headers of to-be-encrypted packets.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal
2018-08-29 00:19:00 +02:00
committed by Pablo Neira Ayuso
parent a82738adff
commit 02b408fae3
2 changed files with 13 additions and 0 deletions
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2
include/uapi/linux/netfilter/nf_tables.h
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@@ -826,12 +826,14 @@ enum nft_meta_keys {
* @NFT_RT_NEXTHOP4: routing nexthop for IPv4
* @NFT_RT_NEXTHOP6: routing nexthop for IPv6
* @NFT_RT_TCPMSS: fetch current path tcp mss
* @NFT_RT_XFRM: boolean, skb->dst->xfrm != NULL
*/
enum nft_rt_keys {
NFT_RT_CLASSID,
NFT_RT_NEXTHOP4,
NFT_RT_NEXTHOP6,
NFT_RT_TCPMSS,
NFT_RT_XFRM,
__NFT_RT_MAX
};
#define NFT_RT_MAX (__NFT_RT_MAX - 1)