Add experimental option for TCP FastOpen....

net/socket/tcp_client_socket_libevent.h

 // 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_LIBEVENT_H_
 #define NET_SOCKET_TCP_CLIENT_SOCKET_LIBEVENT_H_
 #pragma once
 
 #include "base/message_loop.h"
 #include "base/non_thread_safe.h"
@@ skipping 25 matching lines @@
   // 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_; }
   virtual void SetSubresourceSpeculation();
   virtual void SetOmniboxSpeculation();
   virtual bool WasEverUsed() const;
+  virtual bool UsingTCPFastOpen() 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);
   virtual bool SetReceiveBufferSize(int32 size);
   virtual bool SetSendBufferSize(int32 size);
 
  private:
@@ skipping 64 matching lines @@
   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);
 
   // Helper to add a TCP_CONNECT (end) event to the NetLog.
   void LogConnectCompletion(int net_error);
 
+  // Internal function to write to a socket.
+  int InternalWrite(IOBuffer* buf, int buf_len);
+
   int 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 socket's libevent wrappers
   MessageLoopForIO::FileDescriptorWatcher read_socket_watcher_;
@@ skipping 22 matching lines @@
 
   // The OS error that CONNECT_STATE_CONNECT last completed with.
   int connect_os_error_;
 
   BoundNetLog net_log_;
 
   // Record of connectivity and transmissions, for use in speculative connection
   // histograms.
   UseHistory use_history_;
 
+  // Enables experimental TCP FastOpen option.
+  bool use_tcp_fastopen_;
+
+  // True when TCP FastOpen is in use and we have done the connect.
+  bool tcp_fastopen_connected_;
+
   DISALLOW_COPY_AND_ASSIGN(TCPClientSocketLibevent);
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_TCP_CLIENT_SOCKET_LIBEVENT_H_