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wintun: don't try to flush interface, but rather delete

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This commit is contained in:
Jason A. Donenfeld
2019-05-17 16:06:02 +02:00
parent c718f3940d
commit a6dbe4f475
2 changed files with 9 additions and 26 deletions
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26
tun/tun_windows.go
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@@ -65,30 +65,22 @@ func CreateTUN(ifname string) (TUNDevice, error) {
// Does an interface with this name already exist?
wt, err = wintun.GetInterface(ifname, 0)
if wt == nil {
// Interface does not exist or an error occurred. Create one.
wt, _, err = wintun.CreateInterface("WireGuard Tunnel Adapter", 0)
if err == nil {
// If so, we delete it, in case it has weird residual configuration.
_, _, err = wt.DeleteInterface(0)
if err != nil {
return nil, fmt.Errorf("wintun.CreateInterface: %v", err)
return nil, fmt.Errorf("Unable to delete already existing Wintun interface: %v", err)
}
} else if err != nil {
// Foreign interface with the same name found.
// We could create a Wintun interface under a temporary name. But, should our
// process die without deleting this interface first, the interface would remain
// orphaned.
return nil, fmt.Errorf("wintun.GetInterface: %v", err)
}
wt, _, err = wintun.CreateInterface("WireGuard Tunnel Adapter", 0)
if err != nil {
return nil, fmt.Errorf("Unable to create Wintun interface: %v", err)
}
err = wt.SetInterfaceName(ifname)
if err != nil {
wt.DeleteInterface(0)
return nil, fmt.Errorf("wintun.SetInterfaceName: %v", err)
}
err = wt.FlushInterface()
if err != nil {
wt.DeleteInterface(0)
return nil, fmt.Errorf("wintun.FlushInterface: %v", err)
return nil, fmt.Errorf("Unable to set name of Wintun interface: %v", err)
}
return &NativeTun{