object: add userdata and comment support

This patch adds NFTNL_OBJ_USERDATA to support userdata for objects.

Also adds NFTNL_UDATA_OBJ_COMMENT to support comments for objects,
stored in userdata space.

Bumps libnftnl.map to 15 as nftnl_obj_get_data needs to be exported to
enable getting object attributes/data.

Signed-off-by: Jose M. Guisado Gomez <guigom@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/obj.h b/include/obj.h
index 10f806c..d9e856a 100644
--- a/include/obj.h
+++ b/include/obj.h
@@ -22,6 +22,11 @@ struct nftnl_obj {
 	uint32_t		flags;
 	uint64_t		handle;
 
+	struct {
+		void		*data;
+		uint32_t	len;
+	} user;
+
 	union {
 		struct nftnl_obj_counter {
 			uint64_t	pkts;