tests/shell: test for maximum length of "comment" in "comments_objects_0"

The comment length is limited to NFTNL_UDATA_COMMENT_MAXLEN. Test for
that.

Adjust an existing test for that.

Also rename $EXPECTED to $RULESET. We don't compare the value of
$EXPECTED against the actually configured rules. It also wouldn't work,
because the input is not normalized and wouldn't match. It also isn't
necessary, because there is a .nft dump file.

Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 17 insertions, 5 deletions

diff --git a/tests/shell/testcases/optionals/comments_objects_0 b/tests/shell/testcases/optionals/comments_objects_0
index 7437c77b..301f5518 100755
--- a/tests/shell/testcases/optionals/comments_objects_0
+++ b/tests/shell/testcases/optionals/comments_objects_0
@@ -1,9 +1,23 @@
 #!/bin/bash
 
-EXPECTED='table ip filter {
+set -e
+
+COMMENT128="12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678"
+
+# test for pass with comment that is 128 bytes long.
+rc=0
+$NFT add table ip filter \{ quota foo1 \{ comment "\"${COMMENT128}\"" \}\; \}\; || rc="$?"
+test "$rc" = 0
+
+# test for failure with comment that is 128+1 bytes long.
+rc=0
+$NFT add table ip filter \{ quota foo2 \{ comment "\"${COMMENT128}x\"" \}\; \}\; || rc="$?"
+test "$rc" = 1
+
+RULESET='table ip filter {
 	quota q {
 		over 1200 bytes
-		comment "test1"
+		comment "'"$COMMENT128"'"
 	}
 
 	counter c {
@@ -39,6 +53,4 @@ EXPECTED='table ip filter {
 }
 '
 
-set -e
-
-$NFT -f - <<< "$EXPECTED"
+$NFT -f - <<< "$RULESET"