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"
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"
25 class ChannelWin : public Channel,
26 public internal::ChannelReader,
27 public base::MessageLoopForIO::IOHandler {
29 // Mirror methods of Channel, see ipc_channel.h for description.
30 ChannelWin(const IPC::ChannelHandle &channel_handle, Mode mode,
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);
45 // ChannelReader implementation.
46 virtual ReadState ReadData(char* buffer,
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,
55 bool CreatePipe(const IPC::ChannelHandle &channel_handle, Mode mode);
57 bool ProcessConnection();
58 bool ProcessOutgoingMessages(base::MessageLoopForIO::IOContext* context,
61 // MessageLoop::IOHandler implementation.
62 virtual void OnIOCompleted(base::MessageLoopForIO::IOContext* context,
63 DWORD bytes_transfered,
68 explicit State(ChannelWin* channel);
70 base::MessageLoopForIO::IOContext context;
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.
100 // Tracks the lifetime of this object, for debugging purposes.
103 // OS result for the current write. TODO(rvargas): remove this.
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.
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);
126 #endif // IPC_IPC_CHANNEL_WIN_H_