relax mnl_attr_type_valid() checkings and change errno value

This patch relaxes strict attribute checkings in the example files.
I have also changed the errno value, now it's EOPNOTSUPP instead of
EINVAL.

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

1 files changed, 4 insertions, 4 deletions

diff --git a/examples/nf-queue.c b/examples/nf-queue.c
index bde9db1..1df004a 100644
--- a/examples/nf-queue.c
+++ b/examples/nf-queue.c
@@ -26,10 +26,10 @@ static int parse_attr_cb(const struct nlattr *attr, void *data)
         const struct nlattr **tb = (const struct nlattr **)data;
 	int type = mnl_attr_get_type(attr);
 
-	if (mnl_attr_type_valid(attr, NFQA_MAX) < 0) {
-		perror("mnl_attr_type_valid");
-		return MNL_CB_ERROR;
-	}
+	/* skip unsupported attribute in user-space */
+	if (mnl_attr_type_valid(attr, NFQA_MAX) < 0)
+		return MNL_CB_OK;
+
 	switch(type) {
 	case NFQA_MARK:
 	case NFQA_IFINDEX_INDEV: