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-rw-r--r--tun_darwin.go4
1 files changed, 2 insertions, 2 deletions
diff --git a/tun_darwin.go b/tun_darwin.go
index ef84967..772f311 100644
--- a/tun_darwin.go
+++ b/tun_darwin.go
@@ -100,8 +100,8 @@ func (tun *NativeTun) RoutineRouteListener(tunIfindex int) {
func CreateTUN(name string) (TUNDevice, error) {
ifIndex := -1
if name != "utun" {
- fmt.Sscanf(name, "utun%d", &ifIndex)
- if ifIndex < 0 {
+ _, err := fmt.Sscanf(name, "utun%d", &ifIndex)
+ if err != nil || ifIndex < 0 {
return nil, fmt.Errorf("Interface name must be utun[0-9]*")
}
}