Crash the network or desktop process when an unknown IPC message is received.

remoting/host/desktop_session_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "remoting/host/desktop_session_win.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/path_service.h"
 #include "ipc/ipc_message_macros.h"
@@ skipping 64 matching lines @@
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(DesktopSessionWin, message)
     IPC_MESSAGE_HANDLER(ChromotingDesktopDaemonMsg_DesktopAttached,
                         OnDesktopSessionAgentAttached)
     IPC_MESSAGE_HANDLER(ChromotingDesktopDaemonMsg_InjectSas,
                         OnInjectSas)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
+
+  if (!handled) {
+    LOG(ERROR) << "Received unexpected IPC type: " << message.type();
+    RestartDesktopProcess(FROM_HERE);
+  }
+
   return handled;
 }
 
 void DesktopSessionWin::OnPermanentError() {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   launcher_.reset();
 
   // This call will delete |this| so it should be at the very end of the method.
   daemon_process()->CloseDesktopSession(id());
@@ skipping 59 matching lines @@
 
 void DesktopSessionWin::RestartDesktopProcess(
     const tracked_objects::Location& location) {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   launcher_->Send(new ChromotingDaemonDesktopMsg_Crash(
       location.function_name(), location.file_name(), location.line_number()));
 }
 
 }  // namespace remoting