[PATCH nft 05/11] osf: add parse and build userdata interface

[Pablo Neira Ayuso <pablo@netfilter.org>]

Add support for meta userdata area.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 src/expression.c |  1 +
 src/osf.c        | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/src/expression.c b/src/expression.c
index 191bc2be104b..7d198222c90b 100644
--- a/src/expression.c
+++ b/src/expression.c
@@ -1230,6 +1230,7 @@ const struct expr_ops *expr_ops_by_type(enum expr_types etype)
 	case EXPR_EXTHDR: return &exthdr_expr_ops;
 	case EXPR_META: return &meta_expr_ops;
 	case EXPR_SOCKET: return &socket_expr_ops;
+	case EXPR_OSF: return &osf_expr_ops;
 	default:
 		break;
 	}
diff --git a/src/osf.c b/src/osf.c
index f0c22393cd85..cb58315d714d 100644
--- a/src/osf.c
+++ b/src/osf.c
@@ -37,6 +37,17 @@ static bool osf_expr_cmp(const struct expr *e1, const struct expr *e2)
 	       (e1->osf.flags == e2->osf.flags);
 }
 
+static int osf_expr_build_udata(struct nftnl_udata_buf *udbuf,
+				 const struct expr *expr)
+{
+	return 0;
+}
+
+static struct expr *osf_expr_parse_udata(const struct nftnl_udata *attr)
+{
+	return osf_expr_alloc(&internal_location, 0, 0);
+}
+
 const struct expr_ops osf_expr_ops = {
 	.type		= EXPR_OSF,
 	.name		= "osf",
@@ -44,6 +55,8 @@ const struct expr_ops osf_expr_ops = {
 	.clone		= osf_expr_clone,
 	.cmp		= osf_expr_cmp,
 	.json		= osf_expr_json,
+	.parse_udata	= osf_expr_parse_udata,
+	.build_udata	= osf_expr_build_udata,
 };
 
 struct expr *osf_expr_alloc(const struct location *loc, const uint8_t ttl,
-- 
2.11.0