Plumbing for TCP FastOpen for SSL sockets.

net/socket/stream_socket.h

 // Copyright (c) 2012 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_STREAM_SOCKET_H_
 #define NET_SOCKET_STREAM_SOCKET_H_
 
 #include "net/base/net_log.h"
 #include "net/socket/next_proto.h"
 #include "net/socket/socket.h"
@@ skipping 61 matching lines @@
 
   // Returns true if the socket ever had any reads or writes.  StreamSockets
   // layered on top of transport sockets should return if their own Read() or
   // Write() methods had been called, not the underlying transport's.
   virtual bool WasEverUsed() const = 0;
 
   // Returns true if the underlying transport socket is using TCP FastOpen.
   // TCP FastOpen is an experiment with sending data in the TCP SYN packet.
   virtual bool UsingTCPFastOpen() const = 0;
 
+  // Enables use of TCP FastOpen for the underlying transport socket.
+  virtual void EnableTCPFastOpen() {}

[Randy Smith (Not in Mondays), 2014/08/11 19:07:01]

I dislike the idea of the stream socket abstraction knowing about the TCP Fast
Open concept.  I'd instead rather have this be "EnableIdempotentFirstWrite" or
"EnableConnectionWriteCombination" or something similarly abstract.  You can
turn that into enabling fast open for the concrete sockets for which it makes
sense.

+
   // Returns true if NPN was negotiated during the connection of this socket.
   virtual bool WasNpnNegotiated() const = 0;
 
   // Returns the protocol negotiated via NPN for this socket, or
   // kProtoUnknown will be returned if NPN is not applicable.
   virtual NextProto GetNegotiatedProtocol() const = 0;
 
   // Gets the SSL connection information of the socket.  Returns false if
   // SSL was not used by this socket.
   virtual bool GetSSLInfo(SSLInfo* ssl_info) = 0;
@@ skipping 37 matching lines @@
     // identify the motivation.
     bool omnibox_speculation_;
     bool subresource_speculation_;
     DISALLOW_COPY_AND_ASSIGN(UseHistory);
   };
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_STREAM_SOCKET_H_