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)

proxy/base.go

@@ -22,8 +22,8 @@ func (b *Base) Addr() string {
 	return b.addr
 }
 
-func (b *Base) Type() string {
-	return "base"
+func (b *Base) Proto() string {
+	return ""
 }
 
 func (b *Base) DialContext(context.Context, *adapter.Metadata) (net.Conn, error) {

proxy/direct.go

@@ -20,8 +20,8 @@ func NewDirect() *Direct {
 	}
 }
 
-func (d *Direct) Type() string {
-	return "direct"
+func (d *Direct) Proto() string {
+	return DirectProto.String()
 }
 
 func (d *Direct) DialContext(ctx context.Context, metadata *adapter.Metadata) (net.Conn, error) {

proxy/proto.go

@@ -0,0 +1,24 @@
+package proxy
+
+import "fmt"
+
+const (
+	DirectProto Proto = iota
+	ShadowsocksProto
+	Socks5Proto
+)
+
+type Proto uint8
+
+func (proto Proto) String() string {
+	switch proto {
+	case DirectProto:
+		return "direct"
+	case ShadowsocksProto:
+		return "ss"
+	case Socks5Proto:
+		return "socks5"
+	default:
+		return fmt.Sprintf("proto(%d)", proto)
+	}
+}

proxy/proxy.go

@@ -25,7 +25,7 @@ type Dialer interface {
 type Proxy interface {
 	Dialer
 	Addr() string
-	Type() string
+	Proto() string
 }
 
 // SetDialer sets default Dialer.

proxy/shadowsocks.go

@@ -39,8 +39,8 @@ func NewShadowsocks(addr, method, password, obfsMode, obfsHost string) (*Shadows
 	}, nil
 }
 
-func (ss *Shadowsocks) Type() string {
-	return "ss"
+func (ss *Shadowsocks) Proto() string {
+	return ShadowsocksProto.String()
 }
 
 func (ss *Shadowsocks) DialContext(ctx context.Context, metadata *adapter.Metadata) (c net.Conn, err error) {

proxy/socks5.go

@@ -29,8 +29,8 @@ func NewSocks5(addr, user, pass string) (*Socks5, error) {
 	}, nil
 }
 
-func (ss *Socks5) Type() string {
-	return "socks5"
+func (ss *Socks5) Proto() string {
+	return Socks5Proto.String()
 }
 
 func (ss *Socks5) DialContext(ctx context.Context, metadata *adapter.Metadata) (c net.Conn, err error) {