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// Copyright (c) 2010 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_SOCKET_TCP_CLIENT_SOCKET_WIN_H_
#define NET_SOCKET_TCP_CLIENT_SOCKET_WIN_H_
#include <winsock2.h>
#include "base/non_thread_safe.h"
#include "base/object_watcher.h"
#include "net/base/address_list.h"
#include "net/base/completion_callback.h"
#include "net/base/net_log.h"
#include "net/socket/client_socket.h"
namespace net {
class BoundNetLog;
class TCPClientSocketWin : public ClientSocket, NonThreadSafe {
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.
TCPClientSocketWin(const AddressList& addresses, net::NetLog* net_log);
~TCPClientSocketWin();
// ClientSocket methods:
virtual int Connect(CompletionCallback* callback);
virtual void Disconnect();
virtual bool IsConnected() const;
virtual bool IsConnectedAndIdle() const;
virtual int GetPeerAddress(AddressList* address) const;
virtual const BoundNetLog& NetLog() const { return net_log_; }
// 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);
virtual bool SetReceiveBufferSize(int32 size);
virtual bool SetSendBufferSize(int32 size);
private:
// State machine for connecting the socket.
enum ConnectState {
CONNECT_STATE_CONNECT,
CONNECT_STATE_CONNECT_COMPLETE,
CONNECT_STATE_NONE,
};
class Core;
// State machine used by Connect().
int DoConnectLoop(int result);
int DoConnect();
int DoConnectComplete(int result);
// Helper used by Disconnect(), which disconnects minus the logging and
// resetting of current_ai_.
void DoDisconnect();
// Returns true if a Connect() is in progress.
bool waiting_connect() const {
return next_connect_state_ != CONNECT_STATE_NONE;
}
// Returns the OS error code (or 0 on success).
int CreateSocket(const struct addrinfo* ai);
// Called after Connect() has completed with |net_error|.
void LogConnectCompletion(int net_error);
void DoReadCallback(int rv);
void DoWriteCallback(int rv);
void DidCompleteConnect();
void DidCompleteRead();
void DidCompleteWrite();
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_read_;
bool waiting_write_;
// The core of the socket that can live longer than the socket itself. We pass
// resources to the Windows async IO functions and we have to make sure that
// they are not destroyed while the OS still references them.
scoped_refptr<Core> core_;
// External callback; called when connect or read is complete.
CompletionCallback* read_callback_;
// External callback; called when write is complete.
CompletionCallback* write_callback_;
// The next state for the Connect() state machine.
ConnectState next_connect_state_;
// The OS error that CONNECT_STATE_CONNECT last completed with.
int connect_os_error_;
BoundNetLog net_log_;
DISALLOW_COPY_AND_ASSIGN(TCPClientSocketWin);
};
} // namespace net
#endif // NET_SOCKET_TCP_CLIENT_SOCKET_WIN_H_
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