Allow server sockets to rebind to same port if there is nothing actively listening on that port.

net/socket/tcp_server_socket_win.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.
 
 #ifndef NET_SOCKET_TCP_SERVER_SOCKET_WIN_H_
 #define NET_SOCKET_TCP_SERVER_SOCKET_WIN_H_
 
 #include <winsock2.h>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 16 matching lines @@
   TCPServerSocketWin(net::NetLog* net_log,
                      const net::NetLog::Source& source);
   ~TCPServerSocketWin();
 
   // net::ServerSocket implementation.
   virtual int Listen(const net::IPEndPoint& address, int backlog);
   virtual int GetLocalAddress(IPEndPoint* address) const;
   virtual int Accept(scoped_ptr<StreamSocket>* socket,
                      const CompletionCallback& callback);
 
+  // Sets corresponding flags to allow the socket to share the local address to
+  // which the socket will be bound with other processes. Should be called
+  // before Bind().
+  void AllowAddressReuse();
+
   // base::ObjectWatcher::Delegate implementation.
   virtual void OnObjectSignaled(HANDLE object);
 
  private:
+  int SetSocketOptions();
   int AcceptInternal(scoped_ptr<StreamSocket>* socket);
   void Close();
 
   SOCKET socket_;
   HANDLE socket_event_;
 
   base::win::ObjectWatcher accept_watcher_;
 
   scoped_ptr<StreamSocket>* accept_socket_;
   CompletionCallback accept_callback_;
 
+  bool reuse_address_;
+
   BoundNetLog net_log_;
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_TCP_SERVER_SOCKET_WIN_H_