Chore: rename proxy Type() to Proto()

engine/engine.go

@@ -121,7 +121,7 @@ func (e *Engine) setStack() error {
 	log.Infof(
 		"[STACK] %s://%s <-> %s://%s",
 		e.device.Type(), e.device.Name(),
-		e.proxy.Type(), e.proxy.Addr(),
+		e.proxy.Proto(), e.proxy.Addr(),
 	)
 	return nil
 }

engine/parse.go

@@ -33,9 +33,8 @@ func parseDevice(s string, mtu uint32) (device.Device, error) {
 }
 
 func parseProxy(s string) (proxy.Proxy, error) {
-	const defaultProto = "socks5"
 	if !strings.Contains(s, "://") {
-		s = defaultProto + "://" + s
+		s = proxy.Socks5Proto.String() + "://" + s /* default protocol */
 	}
 
 	u, err := url.Parse(s)
@@ -46,11 +45,11 @@ func parseProxy(s string) (proxy.Proxy, error) {
 	proto := strings.ToLower(u.Scheme)
 
 	switch proto {
-	case "direct":
+	case proxy.DirectProto.String():
 		return proxy.NewDirect(), nil
-	case "socks5":
+	case proxy.Socks5Proto.String():
 		return proxy.NewSocks5(parseSocks(u))
-	case "ss":
+	case proxy.ShadowsocksProto.String():
 		return proxy.NewShadowsocks(parseShadowsocks(u))
 	default:
 		return nil, fmt.Errorf("unsupported protocol: %s", proto)