Add DefaultListenSocket.

net/base/default_listen_socket.h

 // Copyright (c) 2011 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.
 
-// TCP/IP server that handles IO asynchronously in the specified MessageLoop.
-// These objects are NOT thread safe.  They use WSAEVENT handles to monitor
-// activity in a given MessageLoop.  This means that callbacks will
-// happen in that loop's thread always and that all other methods (including
-// constructors and destructors) should also be called from the same thread.
+// Default (abstract) listen socket implementation that can be used by clients
+// to implement more specific classes like TCPListenSocket and UnixDomainSocket.
 
-#ifndef NET_BASE_TCP_LISTEN_SOCKET_H_
-#define NET_BASE_TCP_LISTEN_SOCKET_H_
+// Server that handles IO asynchronously in the specified MessageLoop. These
+// objects are NOT thread safe. They use WSAEVENT handles to monitor activity
+// in a given MessageLoop. This means that callbacks will happen in that loop's
+// thread always and that all other methods (including constructors and
+// destructors) should also be called from the same thread.
+
+#ifndef NET_BASE_DEFAULT_LISTEN_SOCKET_H_
+#define NET_BASE_DEFAULT_LISTEN_SOCKET_H_
 #pragma once
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <winsock2.h>
 #endif
 #include <string>
 #if defined(OS_WIN)
 #include "base/win/object_watcher.h"
 #elif defined(OS_POSIX)
 #include "base/message_loop.h"
 #endif
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "net/base/listen_socket.h"
 #include "net/base/net_export.h"
 
 #if defined(OS_POSIX)
 typedef int SOCKET;
 #endif
 
 namespace net {
 
-// Implements a raw socket interface
-class NET_EXPORT TCPListenSocket : public ListenSocket,
+class NET_EXPORT DefaultListenSocket
+    : public ListenSocket,
 #if defined(OS_WIN)
-                                public base::win::ObjectWatcher::Delegate {
+      public base::win::ObjectWatcher::Delegate {
 #elif defined(OS_POSIX)
-                                public MessageLoopForIO::Watcher {
+      public MessageLoopForIO::Watcher {
 #endif
- public:
-  // Listen on port for the specified IP address.  Use 127.0.0.1 to only
-  // accept local connections.
-  static TCPListenSocket* CreateAndListen(std::string ip, int port,
-                                          ListenSocketDelegate* del);
-
-  // NOTE: This is for unit test use only!
-  // Pause/Resume calling Read().  Note that ResumeReads() will also call
-  // Read() if there is anything to read.
-  void PauseReads();
-  void ResumeReads();
-
  protected:
   enum WaitState {
     NOT_WAITING      = 0,
     WAITING_ACCEPT   = 1,
     WAITING_READ     = 2
   };
 
   static const SOCKET kInvalidSocket;
   static const int kSocketError;
 
-  TCPListenSocket(SOCKET s, ListenSocketDelegate* del);
-  virtual ~TCPListenSocket();
-  static SOCKET CreateAndBind(std::string ip, int port);
-  // if valid, returned SOCKET is non-blocking
-  static SOCKET Accept(SOCKET s);
+  DefaultListenSocket(SOCKET s, ListenSocketDelegate* del);
+  virtual ~DefaultListenSocket();
+
+  static SOCKET AcceptInternal(SOCKET s);
 
   virtual void SendInternal(const char* bytes, int len) OVERRIDE;
 
   virtual void Listen();
-  virtual void Accept();
+  virtual void Accept() = 0;
   virtual void Read();
   virtual void Close();
   virtual void CloseSocket(SOCKET s);
 
   // Pass any value in case of Windows, because in Windows
   // we are not using state.
   void WatchSocket(WaitState state);
   void UnwatchSocket();
 
 #if defined(OS_WIN)
   // ObjectWatcher delegate
   virtual void OnObjectSignaled(HANDLE object);
   base::win::ObjectWatcher watcher_;
   HANDLE socket_event_;
 #elif defined(OS_POSIX)
   // Called by MessagePumpLibevent when the socket is ready to do I/O
   virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE;
   virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE;
   WaitState wait_state_;
   // The socket's libevent wrapper
   MessageLoopForIO::FileDescriptorWatcher watcher_;
 #endif
 
-  SOCKET socket_;
+  const SOCKET socket_;
 
  private:
+  // NOTE: This is for unit test use only!
+  // Pause/Resume calling Read().  Note that ResumeReads() will also call
+  // Read() if there is anything to read.
+  friend class TransportClientSocketTest;
+  void PauseReads();
+  void ResumeReads();
+
   bool reads_paused_;
   bool has_pending_reads_;
 
-  DISALLOW_COPY_AND_ASSIGN(TCPListenSocket);
+  DISALLOW_COPY_AND_ASSIGN(DefaultListenSocket);
 };
 
 }  // namespace net
 
-#endif  // NET_BASE_TCP_LISTEN_SOCKET_H_
+#endif  // NET_BASE_DEFAULT_LISTEN_SOCKET_H_