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1 // Copyright 2014 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 NET_SOCKET_SOCKET_LIBEVENT_H_ | |
6 #define NET_SOCKET_SOCKET_LIBEVENT_H_ | |
7 | |
8 #include "base/basictypes.h" | |
9 #include "base/compiler_specific.h" | |
10 #include "base/macros.h" | |
11 #include "base/memory/ref_counted.h" | |
12 #include "base/memory/scoped_ptr.h" | |
13 #include "base/message_loop/message_loop.h" | |
14 #include "base/threading/thread_checker.h" | |
15 #include "net/base/completion_callback.h" | |
16 #include "net/base/net_util.h" | |
17 #include "net/socket/socket_descriptor.h" | |
18 | |
19 namespace net { | |
20 | |
21 class IOBuffer; | |
22 class IPEndPoint; | |
23 | |
24 // Socket class to provide asynchronous read/write operations on top of the | |
25 // posix socket api. It supports AF_INET, AF_INET6, and AF_UNIX addresses. | |
26 class SocketLibevent : public base::MessageLoopForIO::Watcher { | |
27 public: | |
28 SocketLibevent(); | |
29 virtual ~SocketLibevent(); | |
30 | |
31 // Opens a socket and returns net::OK if |address_family| is AF_INET, AF_INET6 | |
32 // or AF_UNIX. Otherwise, it does DCHECK() and returns a net error. | |
33 int Open(int address_family); | |
34 // Takes ownership of |socket|. | |
35 int AdoptConnectedSocket(SocketDescriptor socket, | |
36 const SockaddrStorage& peer_address); | |
37 | |
38 int Bind(const SockaddrStorage& address); | |
39 | |
40 int Listen(int backlog); | |
41 int Accept(scoped_ptr<SocketLibevent>* socket, | |
42 const CompletionCallback& callback); | |
43 | |
44 // Connects socket. On non-ERR_IO_PENDING error, sets errno and returns a net | |
45 // error code. On ERR_IO_PENDING, |callback| will be called later with errno | |
46 // if connect event happens with error. | |
mmenke
2014/07/07 19:20:20
|callback| is called with a net error code, not er
byungchul
2014/07/07 21:10:26
Done.
| |
47 // TODO(byungchul): Need more robust way to pass system errno. | |
48 int Connect(const SockaddrStorage& address, | |
49 const CompletionCallback& callback); | |
50 bool IsConnected() const; | |
51 bool IsConnectedAndIdle() const; | |
52 | |
53 // Multiple outstanding requests of the same type are not supported. | |
54 // Full duplex mode (reading and writing at the same time) is supported. | |
55 // On error which is not ERR_IO_PENDING, sets errno and returns a net error | |
56 // code. On ERR_IO_PENDING, |callback| will be called later with errno if | |
57 // read or write events happen with error. | |
58 // TODO(byungchul): Need more robust way to pass system errno. | |
59 int Read(IOBuffer* buf, int buf_len, const CompletionCallback& callback); | |
60 int Write(IOBuffer* buf, int buf_len, const CompletionCallback& callback); | |
61 | |
62 // Waits for next write event. This is called by TCPsocketLibevent for TCP | |
63 // fastopen after sending first data. Returns ERR_IO_PENDING if it starts | |
64 // waiting for write event successfully. Otherwise, returns a net error code. | |
65 // It must not be called after Write() because Write() calls it internally. | |
66 int WaitForWrite(IOBuffer* buf, int buf_len, | |
67 const CompletionCallback& callback); | |
68 | |
69 int GetLocalAddress(SockaddrStorage* address) const; | |
70 int GetPeerAddress(SockaddrStorage* address) const; | |
71 void SetPeerAddress(const SockaddrStorage& address); | |
72 // Returns true if peer address has been set regardless of socket state. | |
73 bool HasPeerAddress() const; | |
74 | |
75 void Close(); | |
76 | |
77 SocketDescriptor socket_fd() const { return socket_fd_; } | |
78 | |
79 private: | |
80 // base::MessageLoopForIO::Watcher methods. | |
81 virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE; | |
82 virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE; | |
83 | |
84 int DoAccept(scoped_ptr<SocketLibevent>* socket); | |
85 void AcceptCompleted(); | |
86 | |
87 int DoConnect(); | |
88 void ConnectCompleted(); | |
89 | |
90 int DoRead(IOBuffer* buf, int buf_len); | |
91 void ReadCompleted(); | |
92 | |
93 int DoWrite(IOBuffer* buf, int buf_len); | |
94 void WriteCompleted(); | |
95 | |
96 SocketDescriptor socket_fd_; | |
97 | |
98 base::MessageLoopForIO::FileDescriptorWatcher accept_socket_watcher_; | |
99 scoped_ptr<SocketLibevent>* accept_socket_; | |
100 CompletionCallback accept_callback_; | |
101 | |
102 base::MessageLoopForIO::FileDescriptorWatcher read_socket_watcher_; | |
103 scoped_refptr<IOBuffer> read_buf_; | |
104 int read_buf_len_; | |
105 // External callback; called when read is complete. | |
106 CompletionCallback read_callback_; | |
107 | |
108 base::MessageLoopForIO::FileDescriptorWatcher write_socket_watcher_; | |
109 scoped_refptr<IOBuffer> write_buf_; | |
110 int write_buf_len_; | |
111 // External callback; called when write or connect is complete. | |
112 CompletionCallback write_callback_; | |
113 | |
114 // A connect operation is pending. In this case, |write_callback_| needs to be | |
115 // called when connect is complete. | |
116 bool waiting_connect_; | |
117 | |
118 scoped_ptr<SockaddrStorage> peer_address_; | |
119 | |
120 base::ThreadChecker thread_checker_; | |
121 | |
122 DISALLOW_COPY_AND_ASSIGN(SocketLibevent); | |
123 }; | |
124 | |
125 } // namespace net | |
126 | |
127 #endif // NET_SOCKET_SOCKET_LIBEVENT_H_ | |
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