json: add stateful object comment support

When listing a stateful object with JSON support, the comment was ignored.

Output example:

{
  "counter": {
    "family": "inet",
    "name": "mycounter",
    "table": "t",
    "handle": 1,
    "comment": "my comment in counter",
    "packets": 0,
    "bytes": 0
  }
}

Link: https://bugzilla.netfilter.org/show_bug.cgi?id=1611
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/json.c b/src/json.c
index 6598863e..6662f808 100644
--- a/src/json.c
+++ b/src/json.c
@@ -329,6 +329,12 @@ static json_t *obj_print_json(const struct obj *obj)
 			"table", obj->handle.table.name,
 			"handle", obj->handle.handle.id);
 
+	if (obj->comment) {
+		tmp = json_pack("{s:s}", "comment", obj->comment);
+		json_object_update(root, tmp);
+		json_decref(tmp);
+	}
+
 	switch (obj->type) {
 	case NFT_OBJECT_COUNTER:
 		tmp = json_pack("{s:I, s:I}",