From: Filippo Valsorda <hi@filippo.io>
Date: Mon, 21 May 2018 03:38:58 +0000 (-0400)
Subject: Fix Sscanf use in tun_darwin
X-Git-Tag: 0.0.20180524~21
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7a527f7c89fe7929e2bc2c7e38be4862f24cc494;p=thirdparty%2Fwireguard-go.git

Fix Sscanf use in tun_darwin

License: MIT
Signed-off-by: Filippo Valsorda <valsorda@google.com>
---

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]*")
 		}
 	}