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, 7 insertions, 8 deletions

diff --git a/examples/rtnl-route-dump.c b/examples/rtnl-route-dump.c
index bc038cd..34c95cf 100644
--- a/examples/rtnl-route-dump.c
+++ b/examples/rtnl-route-dump.c
@@ -17,10 +17,10 @@
 
 static int data_attr_cb2(const struct nlattr *attr, void *data)
 {
-	if (mnl_attr_type_valid(attr, RTAX_MAX) < 0) {
-		perror("mnl_attr_type_valid");
-		return MNL_CB_ERROR;
-	}
+	/* skip unsupported attribute in user-space */
+	if (mnl_attr_type_valid(attr, RTAX_MAX) < 0)
+		return MNL_CB_OK;
+
 	if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0) {
 		perror("mnl_attr_validate");
 		return MNL_CB_ERROR;
@@ -76,10 +76,9 @@ static int data_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, RTA_MAX) < 0) {
-		perror("mnl_attr_type_valid");
-		return MNL_CB_ERROR;
-	}
+	/* skip unsupported attribute in user-space */
+	if (mnl_attr_type_valid(attr, RTA_MAX) < 0)
+		return MNL_CB_OK;
 
 	switch(type) {
 	case RTA_TABLE: