src: add fwd statement for netdev

This patch add support for the forward statement, only available at the
netdev family.

 # nft add table netdev filter
 # nft add chain netdev filter ingress { type filter hook ingress device eth0 priority 0\; }
 # nft add rule netdev filter ingress fwd to dummy0

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/src/netlink_linearize.c b/src/netlink_linearize.c
index 0dc7f97e..63b3146c 100644
--- a/src/netlink_linearize.c
+++ b/src/netlink_linearize.c
@@ -969,6 +969,22 @@ static void netlink_gen_dup_stmt(struct netlink_linearize_ctx *ctx,
 	nftnl_rule_add_expr(ctx->nlr, nle);
 }
 
+static void netlink_gen_fwd_stmt(struct netlink_linearize_ctx *ctx,
+				 const struct stmt *stmt)
+{
+	enum nft_registers sreg1;
+	struct nftnl_expr *nle;
+
+	nle = alloc_nft_expr("fwd");
+
+	sreg1 = get_register(ctx, stmt->fwd.to);
+	netlink_gen_expr(ctx, stmt->fwd.to, sreg1);
+	netlink_put_register(nle, NFTNL_EXPR_FWD_SREG_DEV, sreg1);
+	release_register(ctx, stmt->fwd.to);
+
+	nftnl_rule_add_expr(ctx->nlr, nle);
+}
+
 static void netlink_gen_queue_stmt(struct netlink_linearize_ctx *ctx,
 				 const struct stmt *stmt)
 {
@@ -1069,6 +1085,8 @@ static void netlink_gen_stmt(struct netlink_linearize_ctx *ctx,
 		return netlink_gen_ct_stmt(ctx, stmt);
 	case STMT_SET:
 		return netlink_gen_set_stmt(ctx, stmt);
+	case STMT_FWD:
+		return netlink_gen_fwd_stmt(ctx, stmt);
 	default:
 		BUG("unknown statement type %s\n", stmt->ops->name);
 	}