yamux: change default MaxStreamWindowSize to 6MB (#3474)

client/proxy/xtcp.go

@@ -137,7 +137,7 @@ func (pxy *XTCPProxy) listenByKCP(listenConn *net.UDPConn, raddr *net.UDPAddr, s
 
 	fmuxCfg := fmux.DefaultConfig()
 	fmuxCfg.KeepAliveInterval = 10 * time.Second
-	fmuxCfg.MaxStreamWindowSize = 2 * 1024 * 1024
+	fmuxCfg.MaxStreamWindowSize = 6 * 1024 * 1024
 	fmuxCfg.LogOutput = io.Discard
 	session, err := fmux.Server(remote, fmuxCfg)
 	if err != nil {

client/service.go

@@ -396,6 +396,7 @@ func (cm *ConnectionManager) OpenConnection() error {
 	fmuxCfg := fmux.DefaultConfig()
 	fmuxCfg.KeepAliveInterval = time.Duration(cm.cfg.TCPMuxKeepaliveInterval) * time.Second
 	fmuxCfg.LogOutput = io.Discard
+	fmuxCfg.MaxStreamWindowSize = 6 * 1024 * 1024
 	session, err := fmux.Client(conn, fmuxCfg)
 	if err != nil {
 		return err

client/visitor/xtcp.go

@@ -351,7 +351,7 @@ func (ks *KCPTunnelSession) Init(listenConn *net.UDPConn, raddr *net.UDPAddr) er
 
 	fmuxCfg := fmux.DefaultConfig()
 	fmuxCfg.KeepAliveInterval = 10 * time.Second
-	fmuxCfg.MaxStreamWindowSize = 2 * 1024 * 1024
+	fmuxCfg.MaxStreamWindowSize = 6 * 1024 * 1024
 	fmuxCfg.LogOutput = io.Discard
 	session, err := fmux.Client(remote, fmuxCfg)
 	if err != nil {

server/service.go

@@ -461,6 +461,7 @@ func (svr *Service) HandleListener(l net.Listener) {
 				fmuxCfg := fmux.DefaultConfig()
 				fmuxCfg.KeepAliveInterval = time.Duration(svr.cfg.TCPMuxKeepaliveInterval) * time.Second
 				fmuxCfg.LogOutput = io.Discard
+				fmuxCfg.MaxStreamWindowSize = 6 * 1024 * 1024
 				session, err := fmux.Server(frpConn, fmuxCfg)
 				if err != nil {
 					log.Warn("Failed to create mux connection: %v", err)