diff --git a/main.go b/main.go
index 25fa252..f217287 100644
--- a/main.go
+++ b/main.go
@@ -7,10 +7,17 @@ import (
 
 func main() {
 	config := NewConfig()
-	server := NewServer(config)
-
 	log.Printf("config: %+v", *config)
-	if err := http.ListenAndServe(config.Listen, server); err != nil {
-		panic(err)
+
+	if config.Socks {
+		server := NewSocksServer(config)
+		if err := server.Listen(); err != nil {
+			panic(err)
+		}
+	} else {
+		server := NewServer(config)
+		if err := http.ListenAndServe(config.Listen, server); err != nil {
+			panic(err)
+		}
 	}
 }
diff --git a/socks.go b/socks.go
new file mode 100644
index 0000000..38b1c7a
--- /dev/null
+++ b/socks.go
@@ -0,0 +1,15 @@
+package main
+
+import "errors"
+
+type Socks struct {
+	config *Config
+}
+
+func NewSocksServer(c *Config) Socks {
+	return Socks{config: c}
+}
+
+func (socks Socks) Listen() error {
+	return errors.New("not impl")
+}