1 files changed, 235 insertions, 0 deletions
diff --git a/chromium/net/socket/tcp_socket_libevent.h b/chromium/net/socket/tcp_socket_libevent.h
new file mode 100644
index 00000000000..a50caf0ad59
--- /dev/null
+++ b/chromium/net/socket/tcp_socket_libevent.h
@@ -0,0 +1,235 @@
+// 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.
+
+#ifndef NET_SOCKET_TCP_SOCKET_LIBEVENT_H_
+#define NET_SOCKET_TCP_SOCKET_LIBEVENT_H_
+
+#include "base/basictypes.h"
+#include "base/callback.h"
+#include "base/compiler_specific.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop/message_loop.h"
+#include "base/threading/non_thread_safe.h"
+#include "net/base/address_family.h"
+#include "net/base/completion_callback.h"
+#include "net/base/net_export.h"
+#include "net/base/net_log.h"
+#include "net/socket/socket_descriptor.h"
+
+namespace net {
+
+class AddressList;
+class IOBuffer;
+class IPEndPoint;
+
+class NET_EXPORT TCPSocketLibevent : public base::NonThreadSafe {
+ public:
+  TCPSocketLibevent(NetLog* net_log, const NetLog::Source& source);
+  virtual ~TCPSocketLibevent();
+
+  int Open(AddressFamily family);
+  // Takes ownership of |socket|.
+  int AdoptConnectedSocket(int socket, const IPEndPoint& peer_address);
+
+  int Bind(const IPEndPoint& address);
+
+  int Listen(int backlog);
+  int Accept(scoped_ptr<TCPSocketLibevent>* 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 Write(IOBuffer* buf, int buf_len, const CompletionCallback& callback);
+
+  int GetLocalAddress(IPEndPoint* address) const;
+  int GetPeerAddress(IPEndPoint* address) const;
+
+  // Sets various socket options.
+  // The commonly used options for server listening sockets:
+  // - SetAddressReuse(true).
+  int SetDefaultOptionsForServer();
+  // The commonly used options for client sockets and accepted sockets:
+  // - SetNoDelay(true);
+  // - SetKeepAlive(true, 45).
+  void SetDefaultOptionsForClient();
+  int SetAddressReuse(bool allow);
+  bool SetReceiveBufferSize(int32 size);
+  bool SetSendBufferSize(int32 size);
+  bool SetKeepAlive(bool enable, int delay);
+  bool SetNoDelay(bool no_delay);
+
+  void Close();
+
+  bool UsingTCPFastOpen() const;
+  bool IsValid() const { return socket_ != kInvalidSocket; }
+
+  // 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 NetLog::TYPE_TCP_CONNECT_ATTEMPT entries nested within a
+  // NetLog::TYPE_TCP_CONNECT. These methods set the start/end of
+  // NetLog::TYPE_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 BoundNetLog& net_log() const { return net_log_; }
+
+ private:
+  // States that a fast open socket attempt can result in.
+  enum FastOpenStatus {
+    FAST_OPEN_STATUS_UNKNOWN,
+
+    // The initial fast open connect attempted returned synchronously,
+    // indicating that we had and sent a cookie along with the initial data.
+    FAST_OPEN_FAST_CONNECT_RETURN,
+
+    // The initial fast open connect attempted returned asynchronously,
+    // indicating that we did not have a cookie for the server.
+    FAST_OPEN_SLOW_CONNECT_RETURN,
+
+    // Some other error occurred on connection, so we couldn't tell if
+    // fast open would have worked.
+    FAST_OPEN_ERROR,
+
+    // An attempt to do a fast open succeeded immediately
+    // (FAST_OPEN_FAST_CONNECT_RETURN) and we later confirmed that the server
+    // had acked the data we sent.
+    FAST_OPEN_SYN_DATA_ACK,
+
+    // An attempt to do a fast open succeeded immediately
+    // (FAST_OPEN_FAST_CONNECT_RETURN) and we later confirmed that the server
+    // had nacked the data we sent.
+    FAST_OPEN_SYN_DATA_NACK,
+
+    // An attempt to do a fast open succeeded immediately
+    // (FAST_OPEN_FAST_CONNECT_RETURN) and our probe to determine if the
+    // socket was using fast open failed.
+    FAST_OPEN_SYN_DATA_FAILED,
+
+    // An attempt to do a fast open failed (FAST_OPEN_SLOW_CONNECT_RETURN)
+    // and we later confirmed that the server had acked initial data.  This
+    // should never happen (we didn't send data, so it shouldn't have
+    // been acked).
+    FAST_OPEN_NO_SYN_DATA_ACK,
+
+    // An attempt to do a fast open failed (FAST_OPEN_SLOW_CONNECT_RETURN)
+    // and we later discovered that the server had nacked initial data.  This
+    // is the expected case results for FAST_OPEN_SLOW_CONNECT_RETURN.
+    FAST_OPEN_NO_SYN_DATA_NACK,
+
+    // An attempt to do a fast open failed (FAST_OPEN_SLOW_CONNECT_RETURN)
+    // and our later probe for ack/nack state failed.
+    FAST_OPEN_NO_SYN_DATA_FAILED,
+
+    FAST_OPEN_MAX_VALUE
+  };
+
+  // Watcher simply forwards notifications to Closure objects set via the
+  // constructor.
+  class Watcher: public base::MessageLoopForIO::Watcher {
+   public:
+    Watcher(const base::Closure& read_ready_callback,
+            const base::Closure& write_ready_callback);
+    virtual ~Watcher();
+
+    // base::MessageLoopForIO::Watcher methods.
+    virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE;
+    virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE;
+
+   private:
+    base::Closure read_ready_callback_;
+    base::Closure write_ready_callback_;
+
+    DISALLOW_COPY_AND_ASSIGN(Watcher);
+  };
+
+  int AcceptInternal(scoped_ptr<TCPSocketLibevent>* socket,
+                     IPEndPoint* address);
+
+  int DoConnect();
+  void DoConnectComplete(int result);
+
+  void LogConnectBegin(const AddressList& addresses);
+  void LogConnectEnd(int net_error);
+
+  void DidCompleteRead();
+  void DidCompleteWrite();
+  void DidCompleteConnect();
+  void DidCompleteConnectOrWrite();
+  void DidCompleteAccept();
+
+  // Internal function to write to a socket. Returns an OS error.
+  int InternalWrite(IOBuffer* buf, int buf_len);
+
+  // Called when the socket is known to be in a connected state.
+  void RecordFastOpenStatus();
+
+  int socket_;
+
+  base::MessageLoopForIO::FileDescriptorWatcher accept_socket_watcher_;
+  Watcher accept_watcher_;
+
+  scoped_ptr<TCPSocketLibevent>* accept_socket_;
+  IPEndPoint* accept_address_;
+  CompletionCallback accept_callback_;
+
+  // The socket's libevent wrappers for reads and writes.
+  base::MessageLoopForIO::FileDescriptorWatcher read_socket_watcher_;
+  base::MessageLoopForIO::FileDescriptorWatcher write_socket_watcher_;
+
+  // The corresponding watchers for reads and writes.
+  Watcher read_watcher_;
+  Watcher write_watcher_;
+
+  // The buffer used for reads.
+  scoped_refptr<IOBuffer> read_buf_;
+  int read_buf_len_;
+
+  // The buffer used for writes.
+  scoped_refptr<IOBuffer> write_buf_;
+  int write_buf_len_;
+
+  // External callback; called when read is complete.
+  CompletionCallback read_callback_;
+
+  // External callback; called when write or connect is complete.
+  CompletionCallback write_callback_;
+
+  // Enables experimental TCP FastOpen option.
+  const bool use_tcp_fastopen_;
+
+  // True when TCP FastOpen is in use and we have done the connect.
+  bool tcp_fastopen_connected_;
+
+  FastOpenStatus fast_open_status_;
+
+  // A connect operation is pending. In this case, |write_callback_| needs to be
+  // called when connect is complete.
+  bool waiting_connect_;
+
+  scoped_ptr<IPEndPoint> peer_address_;
+  // The OS error that a connect attempt last completed with.
+  int connect_os_error_;
+
+  bool logging_multiple_connect_attempts_;
+
+  BoundNetLog net_log_;
+
+  DISALLOW_COPY_AND_ASSIGN(TCPSocketLibevent);
+};
+
+}  // namespace net
+
+#endif  // NET_SOCKET_TCP_SOCKET_LIBEVENT_H_