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_WIN_WTS_TERMINAL_MONITOR_H_
6#define REMOTING_HOST_WIN_WTS_TERMINAL_MONITOR_H_
7
8#include <string>
9
10#include "base/basictypes.h"
11#include "base/strings/utf_string_conversions.h"
12
13namespace remoting {
14
15class WtsTerminalObserver;
16
17// Session id that does not represent any session.
18extern const uint32 kInvalidSessionId;
19
20class WtsTerminalMonitor {
21 public:
22  // The console terminal ID.
23  static const char* kConsole;
24
25  virtual ~WtsTerminalMonitor();
26
27  // Registers an observer to receive notifications about a particular WTS
28  // terminal. |terminal_id| is used to specify an RdpClient instance for which
29  // the connected session should be monitored, or |kConsole| may be passed to
30  // monitor the console session.
31  //
32  // Each observer instance can monitor a single WTS console. Returns
33  // |true| of success. Returns |false| if |observer| is already registered.
34  virtual bool AddWtsTerminalObserver(const std::string& terminal_id,
35                                      WtsTerminalObserver* observer) = 0;
36
37  // Unregisters a previously registered observer.
38  virtual void RemoveWtsTerminalObserver(WtsTerminalObserver* observer) = 0;
39
40  // Returns ID of the terminal connected to |session_id| in |*terminal_id|.
41  // Returns false if |session_id| is not attached to the physical console or
42  // does not have an assigned terminal ID.
43  static bool LookupTerminalId(uint32 session_id, std::string* terminal_id);
44
45  // Returns ID of the session that |terminal_id| is attached.
46  // |kInvalidSessionId| is returned if none of the sessions is currently
47  // attahced to |client_endpoint|.
48  static uint32 LookupSessionId(const std::string& terminal_id);
49
50 protected:
51  WtsTerminalMonitor();
52
53 private:
54  DISALLOW_COPY_AND_ASSIGN(WtsTerminalMonitor);
55};
56
57}  // namespace remoting
58
59#endif  // REMOTING_HOST_WIN_WTS_TERMINAL_MONITOR_H_
60