Fix reconnect in case of empty global network policy.
[chromium-blink-merge.git] / ipc / ipc_channel_win.h
blob2f9fee2ac57fd429faafd5b6bd352f76119586fc
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.
5 #ifndef IPC_IPC_CHANNEL_WIN_H_
6 #define IPC_IPC_CHANNEL_WIN_H_
8 #include "ipc/ipc_channel.h"
10 #include <queue>
11 #include <string>
13 #include "base/memory/scoped_ptr.h"
14 #include "base/memory/weak_ptr.h"
15 #include "base/message_loop/message_loop.h"
16 #include "base/win/scoped_handle.h"
17 #include "ipc/ipc_channel_reader.h"
19 namespace base {
20 class ThreadChecker;
23 namespace IPC {
25 class ChannelWin : public Channel,
26 public internal::ChannelReader,
27 public base::MessageLoopForIO::IOHandler {
28 public:
29 // Mirror methods of Channel, see ipc_channel.h for description.
30 ChannelWin(const IPC::ChannelHandle &channel_handle, Mode mode,
31 Listener* listener);
32 ~ChannelWin();
34 // Channel implementation
35 virtual bool Connect() override;
36 virtual void Close() override;
37 virtual bool Send(Message* message) override;
38 virtual base::ProcessId GetPeerPID() const override;
39 virtual base::ProcessId GetSelfPID() const override;
41 static bool IsNamedServerInitialized(const std::string& channel_id);
44 private:
45 // ChannelReader implementation.
46 virtual ReadState ReadData(char* buffer,
47 int buffer_len,
48 int* bytes_read) override;
49 virtual bool WillDispatchInputMessage(Message* msg) override;
50 bool DidEmptyInputBuffers() override;
51 virtual void HandleInternalMessage(const Message& msg) override;
53 static const base::string16 PipeName(const std::string& channel_id,
54 int32* secret);
55 bool CreatePipe(const IPC::ChannelHandle &channel_handle, Mode mode);
57 bool ProcessConnection();
58 bool ProcessOutgoingMessages(base::MessageLoopForIO::IOContext* context,
59 DWORD bytes_written);
61 // MessageLoop::IOHandler implementation.
62 virtual void OnIOCompleted(base::MessageLoopForIO::IOContext* context,
63 DWORD bytes_transfered,
64 DWORD error);
66 private:
67 struct State {
68 explicit State(ChannelWin* channel);
69 ~State();
70 base::MessageLoopForIO::IOContext context;
71 bool is_pending;
74 State input_state_;
75 State output_state_;
77 base::win::ScopedHandle pipe_;
79 base::ProcessId peer_pid_;
81 // Messages to be sent are queued here.
82 std::queue<Message*> output_queue_;
84 // In server-mode, we have to wait for the client to connect before we
85 // can begin reading. We make use of the input_state_ when performing
86 // the connect operation in overlapped mode.
87 bool waiting_connect_;
89 // This flag is set when processing incoming messages. It is used to
90 // avoid recursing through ProcessIncomingMessages, which could cause
91 // problems. TODO(darin): make this unnecessary
92 bool processing_incoming_;
94 // Determines if we should validate a client's secret on connection.
95 bool validate_client_;
97 // True if there is a write in progress. TODO(rvargas): remove this.
98 bool writing_;
100 // Tracks the lifetime of this object, for debugging purposes.
101 uint32 debug_flags_;
103 // OS result for the current write. TODO(rvargas): remove this.
104 uint32 write_error_;
106 // OS result for a previous failed write. TODO(rvargas): remove this.
107 uint32 last_write_error_;
109 // Size of the current write. TODO(rvargas): remove this.
110 uint32 write_size_;
112 // This is a unique per-channel value used to authenticate the client end of
113 // a connection. If the value is non-zero, the client passes it in the hello
114 // and the host validates. (We don't send the zero value fto preserve IPC
115 // compatability with existing clients that don't validate the channel.)
116 int32 client_secret_;
118 scoped_ptr<base::ThreadChecker> thread_check_;
119 base::WeakPtrFactory<ChannelWin> weak_factory_;
121 DISALLOW_COPY_AND_ASSIGN(ChannelWin);
124 } // namespace IPC
126 #endif // IPC_IPC_CHANNEL_WIN_H_