Commit 02b408fa authored by Florian Westphal's avatar Florian Westphal Committed by Pablo Neira Ayuso

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

Useful e.g. to avoid NATting inner headers of to-be-encrypted packets.
Signed-off-by: default avatarFlorian Westphal <fw@strlen.de>
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
parent a82738ad
......@@ -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)
......
......@@ -90,6 +90,11 @@ static void nft_rt_get_eval(const struct nft_expr *expr,
case NFT_RT_TCPMSS:
nft_reg_store16(dest, get_tcpmss(pkt, dst));
break;
#ifdef CONFIG_XFRM
case NFT_RT_XFRM:
nft_reg_store8(dest, !!dst->xfrm);
break;
#endif
default:
WARN_ON(1);
goto err;
......@@ -130,6 +135,11 @@ static int nft_rt_get_init(const struct nft_ctx *ctx,
case NFT_RT_TCPMSS:
len = sizeof(u16);
break;
#ifdef CONFIG_XFRM
case NFT_RT_XFRM:
len = sizeof(u8);
break;
#endif
default:
return -EOPNOTSUPP;
}
......@@ -164,6 +174,7 @@ static int nft_rt_validate(const struct nft_ctx *ctx, const struct nft_expr *exp
case NFT_RT_NEXTHOP4:
case NFT_RT_NEXTHOP6:
case NFT_RT_CLASSID:
case NFT_RT_XFRM:
return 0;
case NFT_RT_TCPMSS:
hooks = (1 << NF_INET_FORWARD) |
......
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