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// Copyright (c) 2006-2008 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_H_
#define NET_BASE_TCP_CLIENT_SOCKET_H_
#include <ws2tcpip.h>
#include "base/object_watcher.h"
#include "net/base/address_list.h"
#include "net/base/client_socket.h"
namespace net {
// A client socket that uses TCP as the transport layer.
//
// NOTE: The implementation supports half duplex only. Read and Write calls
// must not be in progress at the same time.
class TCPClientSocket : public ClientSocket,
public base::ObjectWatcher::Delegate {
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 TCPClientSocket(const AddressList& addresses);
~TCPClientSocket();
// ClientSocket methods:
virtual int Connect(CompletionCallback* callback);
virtual int ReconnectIgnoringLastError(CompletionCallback* callback);
virtual void Disconnect();
virtual bool IsConnected() const;
// Socket methods:
virtual int Read(char* buf, int buf_len, CompletionCallback* callback);
virtual int Write(const char* buf, int buf_len, CompletionCallback* callback);
private:
int CreateSocket(const struct addrinfo* ai);
void DoCallback(int rv);
void DidCompleteConnect();
void DidCompleteIO();
// base::ObjectWatcher::Delegate methods:
virtual void OnObjectSignaled(HANDLE object);
SOCKET socket_;
OVERLAPPED overlapped_;
WSABUF buffer_;
base::ObjectWatcher watcher_;
CompletionCallback* callback_;
// The list of addresses we should try in order to establish a connection.
AddressList addresses_;
// The addrinfo that we are attempting to use or NULL if all addrinfos have
// been tried.
const struct addrinfo* current_ai_;
enum WaitState {
NOT_WAITING,
WAITING_CONNECT,
WAITING_READ,
WAITING_WRITE
};
WaitState wait_state_;
};
} // namespace net
#endif // NET_BASE_TCP_CLIENT_SOCKET_H_
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