src: display offset only if present in hash and numgen expressions

So nft payload python tests don't break.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 8 insertions, 4 deletions

diff --git a/src/expr/hash.c b/src/expr/hash.c
index 08f09f5..c235502 100644
--- a/src/expr/hash.c
+++ b/src/expr/hash.c
@@ -214,12 +214,16 @@ nftnl_expr_hash_snprintf_default(char *buf, size_t size,
 	struct nftnl_expr_hash *hash = nftnl_expr_data(e);
 	int len = size, offset = 0, ret;
 
-	ret = snprintf(buf, len,
-		       "reg %u = %u + jhash(reg %u, %u, 0x%x) %% mod %u ",
-		       hash->offset, hash->dreg, hash->sreg, hash->len,
-		       hash->seed, hash->modulus);
+	ret = snprintf(buf, len, "reg %u = jhash(reg %u, %u, 0x%x) %% mod %u ",
+		       hash->dreg, hash->sreg, hash->len, hash->seed,
+		       hash->modulus);
 	SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
 
+	if (hash->offset) {
+		ret = snprintf(buf, len, "offset %u ", hash->offset);
+		SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+	}
+
 	return offset;
 }