all: now messages between frps and frpc can be encryped when use_encryption set true

src/frp/cmd/frpc/control.go

@@ -131,9 +131,10 @@ func loginToServer(cli *client.ProxyClient) (c *conn.Conn, err error) {
 	}
 
 	req := &msg.ControlReq{
-		Type:      consts.NewCtlConn,
-		ProxyName: cli.Name,
-		Passwd:    cli.Passwd,
+		Type:          consts.NewCtlConn,
+		ProxyName:     cli.Name,
+		Passwd:        cli.Passwd,
+		UseEncryption: cli.UseEncryption,
 	}
 	buf, _ := json.Marshal(req)
 	err = c.Write(string(buf) + "\n")

src/frp/cmd/frps/control.go

@@ -212,6 +212,9 @@ func doLogin(req *msg.ControlReq, c *conn.Conn) (ret int64, info string) {
 			return
 		}
 
+		// set infomations from frpc
+		s.UseEncryption = req.UseEncryption
+
 		// start proxy and listen for user connections, no block
 		err := s.Start()
 		if err != nil {