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netfilter: nf_tables: add nfproto support to meta expression 

Needed by multi-family tables to distinguish IPv4 and IPv6 packets.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Patrick McHardy 2014-01-03 12:16:17 +00:00 committed by Pablo Neira Ayuso
parent 1d49144c0a
commit 124edfa9e0
2 changed files with 6 additions and 0 deletions
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2
include/uapi/linux/netfilter/nf_tables.h
View File

@ -531,6 +531,7 @@ enum nft_exthdr_attributes {
* @NFT_META_NFTRACE: packet nftrace bit * @NFT_META_NFTRACE: packet nftrace bit
* @NFT_META_RTCLASSID: realm value of packet's route (skb->dst->tclassid) * @NFT_META_RTCLASSID: realm value of packet's route (skb->dst->tclassid)
* @NFT_META_SECMARK: packet secmark (skb->secmark) * @NFT_META_SECMARK: packet secmark (skb->secmark)
* @NFT_META_NFPROTO: netfilter protocol
*/ */
enum nft_meta_keys { enum nft_meta_keys {
NFT_META_LEN, NFT_META_LEN,
@ -548,6 +549,7 @@ enum nft_meta_keys {
NFT_META_NFTRACE, NFT_META_NFTRACE,
NFT_META_RTCLASSID, NFT_META_RTCLASSID,
NFT_META_SECMARK, NFT_META_SECMARK,
NFT_META_NFPROTO,
}; };
/** /**

4
net/netfilter/nft_meta.c
View File

@ -43,6 +43,9 @@ static void nft_meta_get_eval(const struct nft_expr *expr,
case NFT_META_PROTOCOL: case NFT_META_PROTOCOL:
*(__be16 *)dest->data = skb->protocol; *(__be16 *)dest->data = skb->protocol;
break; break;
case NFT_META_NFPROTO:
dest->data[0] = pkt->ops->pf;
break;
case NFT_META_PRIORITY: case NFT_META_PRIORITY:
dest->data[0] = skb->priority; dest->data[0] = skb->priority;
break; break;
@ -181,6 +184,7 @@ static int nft_meta_init_validate_get(uint32_t key)
switch (key) { switch (key) {
case NFT_META_LEN: case NFT_META_LEN:
case NFT_META_PROTOCOL: case NFT_META_PROTOCOL:
case NFT_META_NFPROTO:
case NFT_META_PRIORITY: case NFT_META_PRIORITY:
case NFT_META_MARK: case NFT_META_MARK:
case NFT_META_IIF: case NFT_META_IIF: