From fd331bda3f4bbc9aad07ccd4bd2abaa1e363a852 Mon Sep 17 00:00:00 2001
From: Neil Alexander <neilalexander@users.noreply.github.com>
Date: Thu, 25 Jul 2019 08:32:26 +0100
Subject: [PATCH] Windows: don't trip over empty HardwareAddr when enumerating
 interfaces (this happens sometimes when miniport/VPN adapters are active on
 the system)

---
 syscalls_windows.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/syscalls_windows.go b/syscalls_windows.go
index a3b50a5..f38a9cb 100644
--- a/syscalls_windows.go
+++ b/syscalls_windows.go
@@ -300,6 +300,9 @@ func openDev(config Config) (ifce *Interface, err error) {
 	}
 
 	for _, v := range ifces {
+		if len(v.HardwareAddr) < 6 {
+			continue
+		}
 		if bytes.Equal(v.HardwareAddr[:6], mac[:6]) {
 			ifce.name = v.Name
 			return