src/remoting/host/desktop_session_win.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef REMOTING_HOST_DESKTOP_SESSION_WIN_H_
   6 #define REMOTING_HOST_DESKTOP_SESSION_WIN_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/time/time.h"
  11 #include "base/timer/timer.h"
  12 #include "base/win/scoped_handle.h"
  13 #include "ipc/ipc_platform_file.h"
  14 #include "remoting/host/desktop_session.h"
  15 #include "remoting/host/win/wts_terminal_observer.h"
  16 #include "remoting/host/worker_process_ipc_delegate.h"
  17
  18 namespace tracked_objects {
  19 class Location;
  20 }  // namespace tracked_objects
  21
  22 namespace remoting {
  23
  24 class AutoThreadTaskRunner;
  25 class DaemonProcess;
  26 class DesktopSession;
  27 class ScreenResolution;
  28 class WorkerProcessLauncher;
  29 class WtsTerminalMonitor;
  30
  31 // DesktopSession implementation which attaches to either physical or virtual
  32 // (RDP) console. Receives IPC messages from the desktop process, running in
  33 // the target session, via |WorkerProcessIpcDelegate|, and monitors session
  34 // attach/detach events via |WtsTerminalObserer|.
  35 class DesktopSessionWin
  36     : public DesktopSession,
  37       public WorkerProcessIpcDelegate,
  38       public WtsTerminalObserver {
  39  public:
  40   // Creates a desktop session instance that attaches to the physical console.
  41   static scoped_ptr<DesktopSession> CreateForConsole(
  42       scoped_refptr<AutoThreadTaskRunner> caller_task_runner,
  43       scoped_refptr<AutoThreadTaskRunner> io_task_runner,
  44       DaemonProcess* daemon_process,
  45       int id,
  46       const ScreenResolution& resolution);
  47
  48   // Creates a desktop session instance that attaches to a virtual console.
  49   static scoped_ptr<DesktopSession> CreateForVirtualTerminal(
  50       scoped_refptr<AutoThreadTaskRunner> caller_task_runner,
  51       scoped_refptr<AutoThreadTaskRunner> io_task_runner,
  52       DaemonProcess* daemon_process,
  53       int id,
  54       const ScreenResolution& resolution);
  55
  56  protected:
  57   // Passes the owning |daemon_process|, a unique identifier of the desktop
  58   // session |id| and the interface for monitoring session attach/detach events.
  59   // Both |daemon_process| and |monitor| must outlive |this|.
  60   DesktopSessionWin(
  61     scoped_refptr<AutoThreadTaskRunner> caller_task_runner,
  62     scoped_refptr<AutoThreadTaskRunner> io_task_runner,
  63     DaemonProcess* daemon_process,
  64     int id,
  65     WtsTerminalMonitor* monitor);
  66   virtual ~DesktopSessionWin();
  67
  68   const scoped_refptr<AutoThreadTaskRunner>& caller_task_runner() const {
  69     return caller_task_runner_;
  70   }
  71
  72   // Called when |session_attach_timer_| expires.
  73   void OnSessionAttachTimeout();
  74
  75   // Starts monitoring for session attach/detach events for |terminal_id|.
  76   void StartMonitoring(const std::string& terminal_id);
  77
  78   // Stops monitoring for session attach/detach events.
  79   void StopMonitoring();
  80
  81   // Asks DaemonProcess to terminate this session.
  82   void TerminateSession();
  83
  84   // Injects a secure attention sequence into the session.
  85   virtual void InjectSas() = 0;
  86
  87   // WorkerProcessIpcDelegate implementation.
  88   virtual void OnChannelConnected(int32 peer_pid) override;
  89   virtual bool OnMessageReceived(const IPC::Message& message) override;
  90   virtual void OnPermanentError(int exit_code) override;
  91
  92   // WtsTerminalObserver implementation.
  93   virtual void OnSessionAttached(uint32 session_id) override;
  94   virtual void OnSessionDetached() override;
  95
  96  private:
  97   // ChromotingDesktopDaemonMsg_DesktopAttached handler.
  98   void OnDesktopSessionAgentAttached(IPC::PlatformFileForTransit desktop_pipe);
  99
 100   // Requests the desktop process to crash.
 101   void CrashDesktopProcess(const tracked_objects::Location& location);
 102
 103   // Reports time elapsed since previous event to the debug log.
 104   void ReportElapsedTime(const std::string& event);
 105
 106   // Task runner on which public methods of this class should be called.
 107   scoped_refptr<AutoThreadTaskRunner> caller_task_runner_;
 108
 109   // Message loop used by the IPC channel.
 110   scoped_refptr<AutoThreadTaskRunner> io_task_runner_;
 111
 112   // Handle of the desktop process (running an instance of DesktopSessionAgent).
 113   base::win::ScopedHandle desktop_process_;
 114
 115   // Launches and monitors the desktop process.
 116   scoped_ptr<WorkerProcessLauncher> launcher_;
 117
 118   // Used to unsubscribe from session attach and detach events.
 119   WtsTerminalMonitor* monitor_;
 120
 121   // True if |this| is subsribed to receive session attach/detach notifications.
 122   bool monitoring_notifications_;
 123
 124   // Used to report an error if the session attach notification does not arrives
 125   // for too long.
 126   base::OneShotTimer<DesktopSessionWin> session_attach_timer_;
 127
 128   base::Time last_timestamp_;
 129
 130   DISALLOW_COPY_AND_ASSIGN(DesktopSessionWin);
 131 };
 132
 133 }  // namespace remoting
 134
 135 #endif  // REMOTING_HOST_DESKTOP_SESSION_WIN_H_