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wintun: allow controlling GUID

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This commit is contained in:
Jason A. Donenfeld
2019-06-09 19:20:17 +02:00
parent bb3f1932fa
commit e924280baa
2 changed files with 29 additions and 2 deletions
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10
tun/tun_windows.go
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@@ -60,6 +60,14 @@ func packetAlign(size uint32) uint32 {
// adapter with the same name exist, it is reused.
//
func CreateTUN(ifname string) (TUNDevice, error) {
return CreateTUNWithRequestedGUID(ifname, nil)
}
//
// CreateTUNWithRequestedGUID creates a Wintun adapter with the given name and
// a requested GUID. Should a Wintun adapter with the same name exist, it is reused.
//
func CreateTUNWithRequestedGUID(ifname string, requestedGUID *windows.GUID) (TUNDevice, error) {
var err error
var wt *wintun.Wintun
@@ -74,7 +82,7 @@ func CreateTUN(ifname string) (TUNDevice, error) {
} else if err == windows.ERROR_ALREADY_EXISTS {
return nil, fmt.Errorf("Foreign network interface with the same name exists")
}
wt, _, err = wintun.CreateInterface("WireGuard Tunnel Adapter", 0)
wt, _, err = wintun.CreateInterface("WireGuard Tunnel Adapter", requestedGUID, 0)
if err != nil {
return nil, fmt.Errorf("Unable to create Wintun interface: %v", err)
}