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// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_BASE_TCP_CLIENT_SOCKET_WIN_H_
#define NET_BASE_TCP_CLIENT_SOCKET_WIN_H_
#include <ws2tcpip.h>
#include "base/object_watcher.h"
#include "net/base/address_list.h"
#include "net/base/client_socket.h"
#include "net/base/completion_callback.h"
namespace net {
class TCPClientSocketWin : public ClientSocket {
public:
// The IP address(es) and port number to connect to. The TCP socket will try
// each IP address in the list until it succeeds in establishing a
// connection.
explicit TCPClientSocketWin(const AddressList& addresses);
~TCPClientSocketWin();
// ClientSocket methods:
virtual int Connect(CompletionCallback* callback);
virtual void Disconnect();
virtual bool IsConnected() const;
virtual bool IsConnectedAndIdle() const;
// Socket methods:
// Multiple outstanding requests are not supported.
// Full duplex mode (reading and writing at the same time) is supported
virtual int Read(IOBuffer* buf, int buf_len, CompletionCallback* callback);
virtual int Write(IOBuffer* buf, int buf_len, CompletionCallback* callback);
private:
class ReadDelegate : public base::ObjectWatcher::Delegate {
public:
explicit ReadDelegate(TCPClientSocketWin* tcp_socket)
: tcp_socket_(tcp_socket) { }
virtual ~ReadDelegate() { }
// base::ObjectWatcher::Delegate methods:
virtual void OnObjectSignaled(HANDLE object);
private:
TCPClientSocketWin* const tcp_socket_;
};
class WriteDelegate : public base::ObjectWatcher::Delegate {
public:
explicit WriteDelegate(TCPClientSocketWin* tcp_socket)
: tcp_socket_(tcp_socket) { }
virtual ~WriteDelegate() { }
// base::ObjectWatcher::Delegate methods:
virtual void OnObjectSignaled(HANDLE object);
private:
TCPClientSocketWin* const tcp_socket_;
};
int CreateSocket(const struct addrinfo* ai);
void DoReadCallback(int rv);
void DoWriteCallback(int rv);
void DidCompleteConnect();
SOCKET socket_;
// The list of addresses we should try in order to establish a connection.
AddressList addresses_;
// Where we are in above list, or NULL if all addrinfos have been tried.
const struct addrinfo* current_ai_;
// The various states that the socket could be in.
bool waiting_connect_;
bool waiting_read_;
bool waiting_write_;
// The separate OVERLAPPED variables for asynchronous operation.
// |read_overlapped_| is used for both Connect() and Read().
// |write_overlapped_| is only used for Write();
OVERLAPPED read_overlapped_;
OVERLAPPED write_overlapped_;
// The buffers used in Read() and Write().
WSABUF read_buffer_;
WSABUF write_buffer_;
scoped_refptr<IOBuffer> read_iobuffer_;
scoped_refptr<IOBuffer> write_iobuffer_;
// |reader_| handles the signals from |read_watcher_|.
ReadDelegate reader_;
// |writer_| handles the signals from |write_watcher_|.
WriteDelegate writer_;
// |read_watcher_| watches for events from Connect() and Read().
base::ObjectWatcher read_watcher_;
// |write_watcher_| watches for events from Write();
base::ObjectWatcher write_watcher_;
// External callback; called when connect or read is complete.
CompletionCallback* read_callback_;
// External callback; called when write is complete.
CompletionCallback* write_callback_;
DISALLOW_COPY_AND_ASSIGN(TCPClientSocketWin);
};
} // namespace net
#endif // NET_BASE_TCP_CLIENT_SOCKET_WIN_H_
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