don't call Disconnect() if the connection had been already lost (closes #10747)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@60568 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/sckipc.cpp

@@ -125,6 +125,8 @@ public:
     void Server_OnRequest(wxSocketEvent& event);
 
 private:
+    void HandleDisconnect(wxTCPConnection *connection);
+
     DECLARE_EVENT_TABLE()
     wxDECLARE_NO_COPY_CLASS(wxTCPEventHandler);
 };
@@ -687,6 +689,16 @@ BEGIN_EVENT_TABLE(wxTCPEventHandler, wxEvtHandler)
     EVT_SOCKET(_SERVER_ONREQUEST_ID, wxTCPEventHandler::Server_OnRequest)
 END_EVENT_TABLE()
 
+void wxTCPEventHandler::HandleDisconnect(wxTCPConnection *connection)
+{
+    // connection was closed (either gracefully or not): destroy everything
+    connection->m_sock->Notify(false);
+    connection->m_sock->Close();
+
+    connection->SetConnected(false);
+    connection->OnDisconnect();
+}
+
 void wxTCPEventHandler::Client_OnRequest(wxSocketEvent &event)
 {
     wxSocketBase *sock = event.GetSocket();
@@ -694,18 +706,16 @@ void wxTCPEventHandler::Client_OnRequest(wxSocketEvent &event)
         return;
 
     wxSocketNotify evt = event.GetSocketEvent();
-    wxTCPConnection *connection = (wxTCPConnection *)(sock->GetClientData());
+    wxTCPConnection * const
+        connection = static_cast<wxTCPConnection *>(sock->GetClientData());
 
     // This socket is being deleted; skip this event
     if (!connection)
         return;
 
-    // We lost the connection: destroy everything
     if ( evt == wxSOCKET_LOST )
     {
-        sock->Notify(false);
-        sock->Close();
-        connection->OnDisconnect();
+        HandleDisconnect(connection);
         return;
     }
 
@@ -826,10 +836,7 @@ void wxTCPEventHandler::Client_OnRequest(wxSocketEvent &event)
             break;
 
         case IPC_DISCONNECT:
-            sock->Notify(false);
-            sock->Close();
-            connection->SetConnected(false);
-            connection->OnDisconnect();
+            HandleDisconnect(connection);
             break;
 
         case IPC_FAIL: