[PATCH nft] json: add stateful object comment support

[Fernando Fernandez Mancera <ffmancera@xxxxxxxxxx>]

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@xxxxxxxxxx>
---
 src/json.c                                             | 6 ++++++
 src/parser_json.c                                      | 3 +++
 tests/shell/testcases/json/0006obj_comment_0           | 9 +++++++++
 tests/shell/testcases/json/dumps/0006obj_comment_0.nft | 6 ++++++
 4 files changed, 24 insertions(+)
 create mode 100755 tests/shell/testcases/json/0006obj_comment_0
 create mode 100644 tests/shell/testcases/json/dumps/0006obj_comment_0.nft

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}",
diff --git a/src/parser_json.c b/src/parser_json.c
index 46dca9fd..b8c30b75 100644
--- a/src/parser_json.c
+++ b/src/parser_json.c
@@ -3339,6 +3339,9 @@ static struct cmd *json_parse_cmd_add_object(struct json_ctx *ctx,
 
 	obj = obj_alloc(int_loc);
 
+	if (!json_unpack(root, "{s:s}", "comment", &obj->comment))
+		obj->comment = xstrdup(obj->comment);
+
 	switch (cmd_obj) {
 	case CMD_OBJ_COUNTER:
 		obj->type = NFT_OBJECT_COUNTER;
diff --git a/tests/shell/testcases/json/0006obj_comment_0 b/tests/shell/testcases/json/0006obj_comment_0
new file mode 100755
index 00000000..76d8fe16
--- /dev/null
+++ b/tests/shell/testcases/json/0006obj_comment_0
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+set -e
+
+$NFT flush ruleset
+
+RULESET='{"nftables": [{"metainfo": {"version": "1.0.5", "release_name": "Lester Gooch #4", "json_schema_version": 1}}, {"table": {"family": "inet", "name": "t", "handle": 9}}, {"counter": {"family": "inet", "name": "mycounter", "table": "t", "handle": 1, "comment": "my comment in counter", "packets": 0, "bytes": 0}}]}'
+
+$NFT -j -f - <<< $RULESET
diff --git a/tests/shell/testcases/json/dumps/0006obj_comment_0.nft b/tests/shell/testcases/json/dumps/0006obj_comment_0.nft
new file mode 100644
index 00000000..e52b21b4
--- /dev/null
+++ b/tests/shell/testcases/json/dumps/0006obj_comment_0.nft
@@ -0,0 +1,6 @@
+table inet t {
+	counter mycounter {
+		comment "my comment in counter"
+		packets 0 bytes 0
+	}
+}
-- 
2.30.2