diff --git a/libxsync b/libxsync
index 33e27f5..c9dc057 160000
--- a/libxsync
+++ b/libxsync
@@ -1 +1 @@
-Subproject commit 33e27f52d366381c5ef5647020a36b7cb2c5b190
+Subproject commit c9dc057143720efe76a21368ded925a2a0314288
diff --git a/mainwindow.cpp b/mainwindow.cpp
index b5f846f..e070288 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -121,11 +121,12 @@ MainWindow::~MainWindow() { delete ui; }
 void MainWindow::mainWindowsRun() {  //
   XSyncUdpFactoryImpl::Ins()->initialize();
 
-  auto xsudp = XSyncUdpFactoryImpl::Ins()->createXSUDP();
-  XS_ASSERT(xsudp->initialize("0.0.0.0", 9999));
-  xsudp->startReceive([this, xsudp](XsyncNetAdd &from, uint8_t *data, size_t length) {
-    ZLOGI(TAG, "receive from <%s:%d> (%d) :%s", from.ip.c_str(), from.port, data, length);
-    xsudp->sendto(from, "hello\n", 5, NULL);
-  });
-   
+  // auto xsudp = XSyncUdpFactoryImpl::Ins()->createXSUDP();
+  // XS_ASSERT(xsudp->initialize("0.0.0.0", 9999));
+  // xsudp->startReceive([this, xsudp](XsyncNetAdd &from, uint8_t *data, size_t length) {
+  //   ZLOGI(TAG, "receive from <%s:%d> (%d) :%s", from.ip.c_str(), from.port, data, length);
+  //   xsudp->sendto(from, "hello\n", 5, NULL);
+  // });
+
+
 }
diff --git a/src/xsync_udp_factory_impl.cpp b/src/xsync_udp_factory_impl.cpp
index e40786d..e01ceb6 100644
--- a/src/xsync_udp_factory_impl.cpp
+++ b/src/xsync_udp_factory_impl.cpp
@@ -28,7 +28,8 @@ class XSUDP : public I_XSUDP {
   virtual xs_error_code_t sendto(const XsyncNetAdd& to, const char* data, int32_t length, int32_t* sendlength) override;
   virtual xs_error_code_t receive(char* data, int32_t& length, XsyncNetAdd& from, int overtimems) override;
   virtual xs_error_code_t startReceive(onMessage_t onMessage) override;
-  ;
+  virtual xs_error_code_t stopReceive() override;
+  virtual ~XSUDP();
 };
 
 const char* fmtip(uint32_t ip) {
@@ -94,6 +95,10 @@ xs_error_code_t XSUDP::receive(char* data, int32_t& length, XsyncNetAdd& from, i
 
 xs_error_code_t XSUDP::startReceive(onMessage_t onMessage) {
   m_onMessage = onMessage;
+
+  if (m_zq_thread) {
+    return kxs_ec_success;
+  }
   m_rxbuf     = (char*)malloc(10240);
   m_rxbufsize = 10240;
 
@@ -111,6 +116,28 @@ xs_error_code_t XSUDP::startReceive(onMessage_t onMessage) {
   m_zq_thread->start();
 }
 
+xs_error_code_t XSUDP::stopReceive() {
+  if (m_zq_thread) {
+    m_zq_thread->quit();
+    m_zq_thread->wait();
+    m_zq_thread.reset(nullptr);
+  }
+
+  if (!m_rxbuf) {
+    free(m_rxbuf);
+    m_rxbuf     = nullptr;
+    m_rxbufsize = 0;
+  }
+}
+XSUDP::~XSUDP() {
+  stopReceive();
+
+  if (m_sock_fd > 0) {
+    closesocket(m_sock_fd);
+    m_sock_fd = -1;
+  }
+}
+
 /*******************************************************************************
  *                             xSyncUdpFactoryImpl                             *
  *******************************************************************************/
diff --git a/src/xsync_udp_factory_impl.hpp b/src/xsync_udp_factory_impl.hpp
index d075ff3..049eb6e 100644
--- a/src/xsync_udp_factory_impl.hpp
+++ b/src/xsync_udp_factory_impl.hpp
@@ -14,7 +14,7 @@
 namespace iflytop {
 using namespace std;
 
-class XSyncUdpFactoryImpl : public I_XSyncUDPFactory {
+class XSyncUdpFactoryImpl : public I_XSUDPFactory {
  private:
   /* data */
   XSyncUdpFactoryImpl(){};