new feature: load balancing for tcp proxy

server/service.go

@@ -40,38 +40,41 @@ const (
 
 var ServerService *Service
 
-// Server service.
+// Server service
 type Service struct {
-	// Dispatch connections to different handlers listen on same port.
+	// Dispatch connections to different handlers listen on same port
 	muxer *mux.Mux
 
-	// Accept connections from client.
+	// Accept connections from client
 	listener frpNet.Listener
 
-	// Accept connections using kcp.
+	// Accept connections using kcp
 	kcpListener frpNet.Listener
 
-	// For https proxies, route requests to different clients by hostname and other infomation.
+	// For https proxies, route requests to different clients by hostname and other infomation
 	VhostHttpsMuxer *vhost.HttpsMuxer
 
 	httpReverseProxy *vhost.HttpReverseProxy
 
-	// Manage all controllers.
+	// Manage all controllers
 	ctlManager *ControlManager
 
-	// Manage all proxies.
+	// Manage all proxies
 	pxyManager *ProxyManager
 
-	// Manage all visitor listeners.
+	// Manage all visitor listeners
 	visitorManager *VisitorManager
 
-	// Manage all tcp ports.
+	// Manage all tcp ports
 	tcpPortManager *PortManager
 
-	// Manage all udp ports.
+	// Manage all udp ports
 	udpPortManager *PortManager
 
-	// Controller for nat hole connections.
+	// Tcp Group Controller
+	tcpGroupCtl *TcpGroupCtl
+
+	// Controller for nat hole connections
 	natHoleController *NatHoleController
 }
 
@@ -84,6 +87,7 @@ func NewService() (svr *Service, err error) {
 		tcpPortManager: NewPortManager("tcp", cfg.ProxyBindAddr, cfg.AllowPorts),
 		udpPortManager: NewPortManager("udp", cfg.ProxyBindAddr, cfg.AllowPorts),
 	}
+	svr.tcpGroupCtl = NewTcpGroupCtl(svr.tcpPortManager)
 
 	// Init assets.
 	err = assets.Load(cfg.AssetsDir)