[PATCH nf-next 4/5] netfilter: nft_tunnel: support NFT_TUNNEL_IPV6_SRC/DST match

[wenxu@xxxxxxxxx]

From: wenxu <wenxu@xxxxxxxxx>

Add new two NFT_TUNNEL_IPV6_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               | 28 ++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h
index 7f65019..584868d 100644
--- a/include/uapi/linux/netfilter/nf_tables.h
+++ b/include/uapi/linux/netfilter/nf_tables.h
@@ -1777,6 +1777,8 @@ enum nft_tunnel_keys {
 	NFT_TUNNEL_ID,
 	NFT_TUNNEL_IPV4_SRC,
 	NFT_TUNNEL_IPV4_DST,
+	NFT_TUNNEL_IPV6_SRC,
+	NFT_TUNNEL_IPV6_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 580b51b..0a3005d 100644
--- a/net/netfilter/nft_tunnel.c
+++ b/net/netfilter/nft_tunnel.c
@@ -96,6 +96,30 @@ static void nft_tunnel_get_eval(const struct nft_expr *expr,
 		else
 			regs->verdict.code = NFT_BREAK;
 		break;
+	case NFT_TUNNEL_IPV6_SRC:
+		if (!tun_info) {
+			regs->verdict.code = NFT_BREAK;
+			return;
+		}
+		if (nft_tunnel_mode_validate(priv->mode, tun_info->mode,
+					     NFT_INET_IPV6_TYPE))
+			memcpy(dest, &tun_info->key.u.ipv6.src,
+			       sizeof(struct in6_addr));
+		else
+			regs->verdict.code = NFT_BREAK;
+		break;
+	case NFT_TUNNEL_IPV6_DST:
+		if (!tun_info) {
+			regs->verdict.code = NFT_BREAK;
+			return;
+		}
+		if (nft_tunnel_mode_validate(priv->mode, tun_info->mode,
+					     NFT_INET_IPV6_TYPE))
+			memcpy(dest, &tun_info->key.u.ipv6.dst,
+			       sizeof(struct in6_addr));
+		else
+			regs->verdict.code = NFT_BREAK;
+		break;
 	default:
 		WARN_ON(1);
 		regs->verdict.code = NFT_BREAK;
@@ -129,6 +153,10 @@ static int nft_tunnel_get_init(const struct nft_ctx *ctx,
 	case NFT_TUNNEL_IPV4_DST:
 		len = sizeof(u32);
 		break;
+	case NFT_TUNNEL_IPV6_SRC:
+	case NFT_TUNNEL_IPV6_DST:
+		len = sizeof(struct in6_addr);
+		break;
 	default:
 		return -EOPNOTSUPP;
 	}
-- 
1.8.3.1