[PATCH nft 2/3] src: do not print unnecessary space for the synproxy object

[Zhongqiu Duan <dzq.aishenghu0@xxxxxxxxx>]

If timestamp is not enabled in the synproxy object, an additional space
will be print before the sack-perm flag.

Before this patch:

table inet t {
	synproxy s {
		mss 1460
		wscale 8
		 sack-perm
	}
}

After this patch:

table inet t {
	synproxy s {
		mss 1460
		wscale 8
		sack-perm
	}
}

Signed-off-by: Zhongqiu Duan <dzq.aishenghu0@xxxxxxxxx>
---
 src/rule.c                             | 4 +++-
 tests/shell/testcases/json/single_flag | 4 ++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/rule.c b/src/rule.c
index c0f7570e233c..af3dd39c69d0 100644
--- a/src/rule.c
+++ b/src/rule.c
@@ -1951,7 +1951,9 @@ static void obj_print_data(const struct obj *obj,
 		}
 		if (flags & (NF_SYNPROXY_OPT_TIMESTAMP | NF_SYNPROXY_OPT_SACK_PERM)) {
 			nft_print(octx, "%s%s%s", opts->nl, opts->tab, opts->tab);
-			nft_print(octx, "%s %s", ts_str, sack_str);
+			nft_print(octx, "%s%s%s", ts_str,
+				  flags & NF_SYNPROXY_OPT_TIMESTAMP ? " " : "",
+				  sack_str);
 		}
 		nft_print(octx, "%s", opts->stmt_separator);
 		}
diff --git a/tests/shell/testcases/json/single_flag b/tests/shell/testcases/json/single_flag
index f0a608ad8412..b8fd96170a33 100755
--- a/tests/shell/testcases/json/single_flag
+++ b/tests/shell/testcases/json/single_flag
@@ -157,13 +157,13 @@ STD_SYNPROXY_OBJ_1="table ip t {
 	synproxy s {
 		mss 1280
 		wscale 64
-		 sack-perm
+		sack-perm
 	}
 }"
 JSON_SYNPROXY_OBJ_1='{"nftables": [{"table": {"family": "ip", "name": "t", "handle": 0}}, {"synproxy": {"family": "ip", "name": "s", "table": "t", "handle": 0, "mss": 1280, "wscale": 64, "flags": "sack-perm"}}]}'
 JSON_SYNPROXY_OBJ_1_EQUIV=$(sed 's/\("flags":\) \([^}]*\)/\1 [\2]/' <<< "$JSON_SYNPROXY_OBJ_1")
 
-STD_SYNPROXY_OBJ_2=$(sed 's/ \(sack-perm\)/timestamp \1/' <<< "$STD_SYNPROXY_OBJ_1")
+STD_SYNPROXY_OBJ_2=$(sed 's/\(sack-perm\)/timestamp \1/' <<< "$STD_SYNPROXY_OBJ_1")
 JSON_SYNPROXY_OBJ_2=$(sed 's/\("flags":\) \("sack-perm"\)/\1 ["timestamp", \2]/' <<< "$JSON_SYNPROXY_OBJ_1")
 
 back_n_forth "$STD_SYNPROXY_OBJ_1" "$JSON_SYNPROXY_OBJ_1"
-- 
2.43.0