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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef IPC_IPC_CHANNEL_POSIX_H_ | 5 #ifndef IPC_IPC_CHANNEL_POSIX_H_ |
6 #define IPC_IPC_CHANNEL_POSIX_H_ | 6 #define IPC_IPC_CHANNEL_POSIX_H_ |
7 | 7 |
8 #include "ipc/ipc_channel.h" | 8 #include "ipc/ipc_channel.h" |
9 | 9 |
10 #include <sys/socket.h> // for CMSG macros | 10 #include <sys/socket.h> // for CMSG macros |
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42 // this switch 'on' on the Mac as well. | 42 // this switch 'on' on the Mac as well. |
43 // | 43 // |
44 // The HELLO message from the client to the server is always sent using | 44 // The HELLO message from the client to the server is always sent using |
45 // sendmsg because it will contain the file descriptor that the server | 45 // sendmsg because it will contain the file descriptor that the server |
46 // needs to send file descriptors in later messages. | 46 // needs to send file descriptors in later messages. |
47 #define IPC_USES_READWRITE 1 | 47 #define IPC_USES_READWRITE 1 |
48 #endif | 48 #endif |
49 | 49 |
50 namespace IPC { | 50 namespace IPC { |
51 | 51 |
52 class Channel::ChannelImpl : public internal::ChannelReader, | 52 class ChannelPosix : public Channel, |
53 public base::MessageLoopForIO::Watcher { | 53 public internal::ChannelReader, |
| 54 public base::MessageLoopForIO::Watcher { |
54 public: | 55 public: |
55 // Mirror methods of Channel, see ipc_channel.h for description. | 56 // Mirror methods of Channel, see ipc_channel.h for description. |
56 ChannelImpl(const IPC::ChannelHandle& channel_handle, Mode mode, | 57 ChannelPosix(const IPC::ChannelHandle& channel_handle, Mode mode, |
57 Listener* listener); | 58 Listener* listener); |
58 virtual ~ChannelImpl(); | 59 virtual ~ChannelPosix(); |
59 bool Connect(); | 60 |
60 void Close(); | 61 // Channel implementation |
61 bool Send(Message* message); | 62 virtual bool Connect() OVERRIDE; |
62 int GetClientFileDescriptor(); | 63 virtual void Close() OVERRIDE; |
63 int TakeClientFileDescriptor(); | 64 virtual bool Send(Message* message) OVERRIDE; |
| 65 virtual base::ProcessId GetPeerPID() const OVERRIDE; |
| 66 virtual int GetClientFileDescriptor() const OVERRIDE; |
| 67 virtual int TakeClientFileDescriptor() OVERRIDE; |
| 68 virtual bool AcceptsConnections() const OVERRIDE; |
| 69 virtual bool HasAcceptedConnection() const OVERRIDE; |
| 70 virtual bool GetPeerEuid(uid_t* peer_euid) const OVERRIDE; |
| 71 virtual void ResetToAcceptingConnectionState() OVERRIDE; |
| 72 |
64 void CloseClientFileDescriptor(); | 73 void CloseClientFileDescriptor(); |
65 bool AcceptsConnections() const; | 74 |
66 bool HasAcceptedConnection() const; | |
67 bool GetPeerEuid(uid_t* peer_euid) const; | |
68 void ResetToAcceptingConnectionState(); | |
69 base::ProcessId peer_pid() const { return peer_pid_; } | |
70 static bool IsNamedServerInitialized(const std::string& channel_id); | 75 static bool IsNamedServerInitialized(const std::string& channel_id); |
71 #if defined(OS_LINUX) | 76 #if defined(OS_LINUX) |
72 static void SetGlobalPid(int pid); | 77 static void SetGlobalPid(int pid); |
73 #endif // OS_LINUX | 78 #endif // OS_LINUX |
74 | 79 |
75 private: | 80 private: |
76 bool CreatePipe(const IPC::ChannelHandle& channel_handle); | 81 bool CreatePipe(const IPC::ChannelHandle& channel_handle); |
77 | 82 |
78 bool ProcessOutgoingMessages(); | 83 bool ProcessOutgoingMessages(); |
79 | 84 |
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137 // File descriptor we're listening on for new connections if we listen | 142 // File descriptor we're listening on for new connections if we listen |
138 // for connections. | 143 // for connections. |
139 int server_listen_pipe_; | 144 int server_listen_pipe_; |
140 | 145 |
141 // The pipe used for communication. | 146 // The pipe used for communication. |
142 int pipe_; | 147 int pipe_; |
143 | 148 |
144 // For a server, the client end of our socketpair() -- the other end of our | 149 // For a server, the client end of our socketpair() -- the other end of our |
145 // pipe_ that is passed to the client. | 150 // pipe_ that is passed to the client. |
146 int client_pipe_; | 151 int client_pipe_; |
147 base::Lock client_pipe_lock_; // Lock that protects |client_pipe_|. | 152 mutable base::Lock client_pipe_lock_; // Lock that protects |client_pipe_|. |
148 | 153 |
149 #if defined(IPC_USES_READWRITE) | 154 #if defined(IPC_USES_READWRITE) |
150 // Linux/BSD use a dedicated socketpair() for passing file descriptors. | 155 // Linux/BSD use a dedicated socketpair() for passing file descriptors. |
151 int fd_pipe_; | 156 int fd_pipe_; |
152 int remote_fd_pipe_; | 157 int remote_fd_pipe_; |
153 #endif | 158 #endif |
154 | 159 |
155 // The "name" of our pipe. On Windows this is the global identifier for | 160 // The "name" of our pipe. On Windows this is the global identifier for |
156 // the pipe. On POSIX it's used as a key in a local map of file descriptors. | 161 // the pipe. On POSIX it's used as a key in a local map of file descriptors. |
157 std::string pipe_name_; | 162 std::string pipe_name_; |
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195 #endif | 200 #endif |
196 | 201 |
197 // True if we are responsible for unlinking the unix domain socket file. | 202 // True if we are responsible for unlinking the unix domain socket file. |
198 bool must_unlink_; | 203 bool must_unlink_; |
199 | 204 |
200 #if defined(OS_LINUX) | 205 #if defined(OS_LINUX) |
201 // If non-zero, overrides the process ID sent in the hello message. | 206 // If non-zero, overrides the process ID sent in the hello message. |
202 static int global_pid_; | 207 static int global_pid_; |
203 #endif // OS_LINUX | 208 #endif // OS_LINUX |
204 | 209 |
205 DISALLOW_IMPLICIT_CONSTRUCTORS(ChannelImpl); | 210 DISALLOW_IMPLICIT_CONSTRUCTORS(ChannelPosix); |
206 }; | 211 }; |
207 | 212 |
208 } // namespace IPC | 213 } // namespace IPC |
209 | 214 |
210 #endif // IPC_IPC_CHANNEL_POSIX_H_ | 215 #endif // IPC_IPC_CHANNEL_POSIX_H_ |
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