[PATCH nf-next 2/5] netfilter: nft_tunnel: support NFT_TUNNEL_IPV4_SRC/DST match

[wenxu@xxxxxxxxx]

From: wenxu <wenxu@xxxxxxxxx>

Add new two NFT_TUNNEL_IPV4_SRC/DST match in nft_tunnel

Signed-off-by: wenxu <wenxu@xxxxxxxxx>
---
 include/uapi/linux/netfilter/nf_tables.h |  2 ++
 net/netfilter/nft_tunnel.c               | 22 ++++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h
index 81fed16..7f65019 100644
--- a/include/uapi/linux/netfilter/nf_tables.h
+++ b/include/uapi/linux/netfilter/nf_tables.h
@@ -1775,6 +1775,8 @@ enum nft_tunnel_key_attributes {
 enum nft_tunnel_keys {
 	NFT_TUNNEL_PATH,
 	NFT_TUNNEL_ID,
+	NFT_TUNNEL_IPV4_SRC,
+	NFT_TUNNEL_IPV4_DST,
 	__NFT_TUNNEL_MAX
 };
 #define NFT_TUNNEL_MAX	(__NFT_TUNNEL_MAX - 1)
diff --git a/net/netfilter/nft_tunnel.c b/net/netfilter/nft_tunnel.c
index 78b6e8f..b60e855 100644
--- a/net/netfilter/nft_tunnel.c
+++ b/net/netfilter/nft_tunnel.c
@@ -62,6 +62,26 @@ static void nft_tunnel_get_eval(const struct nft_expr *expr,
 		else
 			regs->verdict.code = NFT_BREAK;
 		break;
+	case NFT_TUNNEL_IPV4_SRC:
+		if (!tun_info) {
+			regs->verdict.code = NFT_BREAK;
+			return;
+		}
+		if (nft_tunnel_mode_validate(priv->mode, tun_info->mode))
+			*dest = tun_info->key.u.ipv4.src;
+		else
+			regs->verdict.code = NFT_BREAK;
+		break;
+	case NFT_TUNNEL_IPV4_DST:
+		if (!tun_info) {
+			regs->verdict.code = NFT_BREAK;
+			return;
+		}
+		if (nft_tunnel_mode_validate(priv->mode, tun_info->mode))
+			*dest = tun_info->key.u.ipv4.dst;
+		else
+			regs->verdict.code = NFT_BREAK;
+		break;
 	default:
 		WARN_ON(1);
 		regs->verdict.code = NFT_BREAK;
@@ -91,6 +111,8 @@ static int nft_tunnel_get_init(const struct nft_ctx *ctx,
 		len = sizeof(u8);
 		break;
 	case NFT_TUNNEL_ID:
+	case NFT_TUNNEL_IPV4_SRC:
+	case NFT_TUNNEL_IPV4_DST:
 		len = sizeof(u32);
 		break;
 	default:
-- 
1.8.3.1