diff --git a/VehicleManage b/VehicleManage
index a496923..400d726 160000
--- a/VehicleManage
+++ b/VehicleManage
@@ -1 +1 @@
-Subproject commit a49692303b2fa90bde97326001b842bb18fc36dc
+Subproject commit 400d726bd6fb8ad347b292c94bc3f81802108dfc
diff --git a/dlink/dlink.cpp b/dlink/dlink.cpp
index 8fd7ce9..e5abff8 100644
--- a/dlink/dlink.cpp
+++ b/dlink/dlink.cpp
@@ -148,16 +148,6 @@ int DLink::SendMessageTo(quint8 ch, quint8 *msg, quint16 len)
         }
     }
 
-    if (multicast_sock)
-    {
-        qint64 flag =  multicast_sock->writeDatagram((const char *)msg, len,multicast_transmit_addr, multicast_transmit_port);
-        if(flag  != -1)
-        {
-            //Byte_Out_ALL += flag;
-        }
-    }
-
-
     return 0;
 }
 
@@ -366,12 +356,21 @@ void DLink::connectSignal(QVariant m_state,
         else if(m_Type.toString() == "Multicast")
         {
             //断开连接
-            if(multicast_sock)
+            for(int i = 0;i < clientSockets.count();i++)
             {
-                qWarning("leave multicast Group");
-                delete multicast_sock;
-                multicast_sock = nullptr;
+                if((clientSockets.at(i).addr == QHostAddress(m_Param3.toString()))&&(clientSockets.at(i).port == m_Param4.toInt()))
+                {
+
+                    clientSockets.at(i).sock->leaveMulticastGroup(QHostAddress(m_Param3.toString()));
+                    clientSockets.at(i).sock->close();
+                    qWarning("leave multicast Group");
+                    clientSockets.at(i).sock->deleteLater();
+
+                    clientSockets.removeAt(i);
+                }
+
             }
+
             emit PortConnected(false,m_usrName,m_Type,m_Param1,m_Param2,m_Param3,m_Param4,m_Param5);
         }
     }
@@ -406,8 +405,6 @@ bool DLink::setupClient(const QHostAddress &local_addr,int local_port,const QHos
         }
     }
 
-
-
     QUdpSocket *clientsock = new QUdpSocket(this);
     int rst = clientsock->open(QIODevice::ReadWrite);
     if(rst)
@@ -436,8 +433,6 @@ bool DLink::setupClient(const QHostAddress &local_addr,int local_port,const QHos
             connect(clientsock, SIGNAL(readyRead()),
                     this, SLOT(readPendingDatagramsClient()));
 
-            //clientsock->disconnectFromHost();
-
             emit showMessage(tr("UdpSocket open"));
         }
         else
@@ -466,43 +461,81 @@ bool DLink::setup_multicast(const QString &recieveIP, qint32 recievePort,
                             const QString &transmitIP, qint32 transmitPort)
 {
     bool isSuccess = false;
-    multicast_transmit_port = transmitPort;
-    multicast_transmit_addr.setAddress(transmitIP);
 
-    if (multicast_sock)
-        delete multicast_sock;
-
-    multicast_recieve_addr.setAddress(recieveIP);
-    multicast_sock = new QUdpSocket(this);
-    if (multicast_sock->bind(QHostAddress::AnyIPv4, recievePort, QUdpSocket::ShareAddress))
-    {
-        if (multicast_sock->joinMulticastGroup(multicast_recieve_addr))
+    foreach (clientNode node, clientSockets) {
+        if(node.sock)
         {
-            connect(multicast_sock, SIGNAL(readyRead()),
-                    this, SLOT(processPendingMulticastDatagrams()));
-            multicast_recieve_port = recievePort;
-            multicast_sock->setSocketOption(QAbstractSocket::MulticastTtlOption, 3);
+            if((node.addr == QHostAddress(recieveIP))&&(node.port == recievePort))
+            {
+                if(node.sock->isOpen())
+                {
+                    node.sock->leaveMulticastGroup(node.addr);
+                    node.sock->close();
+                }
+                //断掉所有的连接
+                disconnect(node.sock,nullptr,nullptr,nullptr);
+
+                node.sock->deleteLater();
+                //node.sock = nullptr;
+
+                clientSockets.removeAt(clientSockets.indexOf(node));
+
+            }
+        }
+    }
+
+    QUdpSocket *clientsock = new QUdpSocket(this);
+    if(clientsock->bind(QHostAddress::AnyIPv4,recievePort,QAbstractSocket::ShareAddress))
+    {
+        if (clientsock->joinMulticastGroup(QHostAddress(recieveIP)))
+        {
+            clientsock->setProxy(QNetworkProxy::NoProxy);
+            clientsock->setSocketOption(QAbstractSocket::MulticastTtlOption, 3);
+
+            clientNode node;
+            node.sock = clientsock;
+            node.addr = QHostAddress(transmitIP);
+            node.port = transmitPort;
+            node.type = devtype::datalink;
+
+            clientSockets.append(node);
+            qWarning() << "multicast open:"
+                     << node.addr
+                     << node.port;
 
             isSuccess = true;
-            emit showMessage(tr("Bind and join the gdt multicast group"));
+
+
+            connect(clientsock, SIGNAL(readyRead()),
+                    this, SLOT(processPendingMulticastDatagrams()));
+
+            emit showMessage(tr("Bind and join the multicast group"));
         }
         else
         {
+            clientsock->close();
             isSuccess = false;
-            delete multicast_sock;
-            multicast_sock = NULL;
-
-            emit showMessage(tr("Fail to join gdt multicast group."));
+            qWarning() << "sock open failure" << clientsock->state();
+            delete clientsock;
+            clientsock = nullptr;
+            emit showMessage(tr("Fail to join multicast group."));
         }
     }
     else
     {
         isSuccess = false;
-        emit showMessage(tr("Fail to bind gdt multicast socket."));
-        delete multicast_sock;
-        multicast_sock = NULL;
+        clientsock->close();
+        qWarning("sock is not binded.");
+        delete clientsock;
+        clientsock = nullptr;
+        emit showMessage(tr("Fail to bind multicast socket."));
     }
+
+
     return isSuccess;
+
+
+
 }
 
 
@@ -556,14 +589,27 @@ void DLink::readPendingDatagramsClient(void)
 
 void DLink::processPendingMulticastDatagrams(void)
 {
-    if(multicast_sock)
-    {
-        while (multicast_sock->hasPendingDatagrams()) {
-            QByteArray datagram;
-            datagram.resize(multicast_sock->pendingDatagramSize());
-            multicast_sock->readDatagram(datagram.data(), datagram.size());
+    QElapsedTimer time;
+    time.start();
+    //轮番查询
+     QObject *obj = sender();
 
-            emit recieveMessage(SourceType::c_sock,datagram);
-        }
-    }
+     if(obj)
+     {
+         QUdpSocket *clientsock = qobject_cast<QUdpSocket *>(obj);
+         if(clientsock)
+         {
+             while (clientsock->hasPendingDatagrams()) {
+                 QByteArray datagram;
+                 datagram.resize(clientsock->pendingDatagramSize());
+                 clientsock->readDatagram(datagram.data(), datagram.size());
+
+                 emit recieveMessage(SourceType::c_sock,datagram);
+             }
+         }
+     }
+
+     int milsec = time.elapsed();
+
+     //qDebug() << "a loop using time:" << milsec << "ms";
 }