From: Jason A. Donenfeld <Jason@zx2c4.com>
Date: Fri, 10 May 2019 19:30:23 +0000 (+0200)
Subject: wintun: add LUID accessor
X-Git-Tag: 0.0.20190517~7
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2d847a38a29ed413f5907cc411c9ff4752001212;p=thirdparty%2Fwireguard-go.git

wintun: add LUID accessor
---

diff --git a/tun/tun_windows.go b/tun/tun_windows.go
index 8218fc3..03e04a2 100644
--- a/tun/tun_windows.go
+++ b/tun/tun_windows.go
@@ -373,3 +373,10 @@ func (tun *NativeTun) Write(buff []byte, offset int) (int, error) {
 func (tun *NativeTun) GUID() windows.GUID {
 	return tun.wt.CfgInstanceID
 }
+
+//
+// GUID returns Windows adapter instance ID.
+//
+func (tun *NativeTun) LUID() uint64 {
+	return ((uint64(tun.wt.LUIDIndex) & ((1 << 24) - 1)) << 24) | ((uint64(tun.wt.IfType) & ((1 << 16) - 1)) << 48)
+}