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>

1 files changed, 4 insertions, 0 deletions

diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c
index 1ceaaa6dfe72..999d04688433 100644
--- a/net/netfilter/nft_meta.c
+++ b/net/netfilter/nft_meta.c
@@ -43,6 +43,9 @@ static void nft_meta_get_eval(const struct nft_expr *expr,
         case NFT_META_PROTOCOL:
                 *(__be16 *)dest->data = skb->protocol;
                 break;
+        case NFT_META_NFPROTO:
+                dest->data[0] = pkt->ops->pf;
+                break;
         case NFT_META_PRIORITY:
                 dest->data[0] = skb->priority;
                 break;
@@ -181,6 +184,7 @@ static int nft_meta_init_validate_get(uint32_t key)
         switch (key) {
         case NFT_META_LEN:
         case NFT_META_PROTOCOL:
+        case NFT_META_NFPROTO:
         case NFT_META_PRIORITY:
         case NFT_META_MARK:
         case NFT_META_IIF: