blob: 1cb2675a369e98441da5d53b6ec5f6c9b355ae65 [file] [log] [blame]
// Copyright 2013 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.
#include <stdint.h>
#include <winsock2.h>
#include <memory>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/threading/thread_checker.h"
#include "base/win/object_watcher.h"
#include "net/base/address_family.h"
#include "net/base/completion_callback.h"
#include "net/base/net_export.h"
#include "net/log/net_log_with_source.h"
#include "net/socket/socket_descriptor.h"
#include "net/socket/socket_performance_watcher.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
namespace net {
class AddressList;
class IOBuffer;
class IPEndPoint;
class NetLog;
struct NetLogSource;
class SocketTag;
class NET_EXPORT TCPSocketWin : public base::win::ObjectWatcher::Delegate {
std::unique_ptr<SocketPerformanceWatcher> socket_performance_watcher,
NetLog* net_log,
const NetLogSource& source);
~TCPSocketWin() override;
int Open(AddressFamily family);
// Takes ownership of |socket|, which is known to already be connected to the
// given peer address. However, peer address may be the empty address, for
// compatibility. The given peer address will be returned by GetPeerAddress.
int AdoptConnectedSocket(SocketDescriptor socket,
const IPEndPoint& peer_address);
// Takes ownership of |socket|, which may or may not be open, bound, or
// listening. The caller must determine the state of the socket based on its
// provenance and act accordingly. The socket may have connections waiting
// to be accepted, but must not be actually connected.
int AdoptUnconnectedSocket(SocketDescriptor socket);
int Bind(const IPEndPoint& address);
int Listen(int backlog);
int Accept(std::unique_ptr<TCPSocketWin>* socket,
IPEndPoint* address,
const CompletionCallback& callback);
int Connect(const IPEndPoint& address, const CompletionCallback& callback);
bool IsConnected() const;
bool IsConnectedAndIdle() const;
// Multiple outstanding requests are not supported.
// Full duplex mode (reading and writing at the same time) is supported.
int Read(IOBuffer* buf, int buf_len, const CompletionCallback& callback);
int ReadIfReady(IOBuffer* buf,
int buf_len,
const CompletionCallback& callback);
int Write(IOBuffer* buf,
int buf_len,
const CompletionCallback& callback,
const NetworkTrafficAnnotationTag& traffic_annotation);
int GetLocalAddress(IPEndPoint* address) const;
int GetPeerAddress(IPEndPoint* address) const;
// Sets various socket options.
// The commonly used options for server listening sockets:
// - SetExclusiveAddrUse().
int SetDefaultOptionsForServer();
// The commonly used options for client sockets and accepted sockets:
// - SetNoDelay(true);
// - SetKeepAlive(true, 45).
void SetDefaultOptionsForClient();
int SetExclusiveAddrUse();
int SetReceiveBufferSize(int32_t size);
int SetSendBufferSize(int32_t size);
bool SetKeepAlive(bool enable, int delay);
bool SetNoDelay(bool no_delay);
// Gets the estimated RTT. Returns false if the RTT is
// unavailable. May also return false when estimated RTT is 0.
bool GetEstimatedRoundTripTime(base::TimeDelta* out_rtt) const
void Close();
// NOOP since TCP FastOpen is not implemented in Windows.
void EnableTCPFastOpenIfSupported() {}
bool IsValid() const { return socket_ != INVALID_SOCKET; }
// Detachs from the current thread, to allow the socket to be transferred to
// a new thread. Should only be called when the object is no longer used by
// the old thread.
void DetachFromThread();
// Marks the start/end of a series of connect attempts for logging purpose.
// TCPClientSocket may attempt to connect to multiple addresses until it
// succeeds in establishing a connection. The corresponding log will have
// multiple NetLogEventType::TCP_CONNECT_ATTEMPT entries nested within a
// NetLogEventType::TCP_CONNECT. These methods set the start/end of
// NetLogEventType::TCP_CONNECT.
// TODO(yzshen): Change logging format and let TCPClientSocket log the
// start/end of a series of connect attempts itself.
void StartLoggingMultipleConnectAttempts(const AddressList& addresses);
void EndLoggingMultipleConnectAttempts(int net_error);
const NetLogWithSource& net_log() const { return net_log_; }
// Return the underlying SocketDescriptor and clean up this object, which may
// no longer be used. This method should be used only for testing. No read,
// write, or accept operations should be pending.
SocketDescriptor ReleaseSocketDescriptorForTesting();
// Apply |tag| to this socket.
void ApplySocketTag(const SocketTag& tag);
class Core;
// base::ObjectWatcher::Delegate implementation.
void OnObjectSignaled(HANDLE object) override;
int AcceptInternal(std::unique_ptr<TCPSocketWin>* socket,
IPEndPoint* address);
int DoConnect();
void DoConnectComplete(int result);
void LogConnectBegin(const AddressList& addresses);
void LogConnectEnd(int net_error);
void RetryRead(int rv);
void DidCompleteConnect();
void DidCompleteWrite();
void DidSignalRead();
SOCKET socket_;
// |socket_performance_watcher_| may be nullptr.
std::unique_ptr<SocketPerformanceWatcher> socket_performance_watcher_;
HANDLE accept_event_;
base::win::ObjectWatcher accept_watcher_;
std::unique_ptr<TCPSocketWin>* accept_socket_;
IPEndPoint* accept_address_;
CompletionCallback accept_callback_;
// The various states that the socket could be in.
bool waiting_connect_;
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_;
// Non-null if a ReadIfReady() is to be completed asynchronously. This is an
// external callback if user used ReadIfReady() instead of Read(), but a
// wrapped callback on top of RetryRead() if Read() is used.
CompletionCallback read_if_ready_callback_;
// External callback; called when write is complete.
CompletionCallback write_callback_;
std::unique_ptr<IPEndPoint> peer_address_;
// The OS error that a connect attempt last completed with.
int connect_os_error_;
bool logging_multiple_connect_attempts_;
NetLogWithSource net_log_;
} // namespace net