Multicast socket API

chrome/browser/extensions/api/socket/udp_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 CHROME_BROWSER_EXTENSIONS_API_SOCKET_UDP_SOCKET_H_
 #define CHROME_BROWSER_EXTENSIONS_API_SOCKET_UDP_SOCKET_H_
 
 #include <string>
 
+#include "base/hash_tables.h"
 #include "chrome/browser/extensions/api/socket/socket.h"
 #include "net/udp/udp_socket.h"
 
 namespace extensions {
 
 class UDPSocket : public Socket {
  public:
   explicit UDPSocket(const std::string& owner_extension_id);
   virtual ~UDPSocket();
 
   virtual void Connect(const std::string& address,
                        int port,
                        const CompletionCallback& callback) OVERRIDE;
   virtual void Disconnect() OVERRIDE;
   virtual int Bind(const std::string& address, int port) OVERRIDE;
   virtual void Read(int count,
                     const ReadCompletionCallback& callback) OVERRIDE;
   virtual void RecvFrom(int count,
                         const RecvFromCompletionCallback& callback) OVERRIDE;
   virtual void SendTo(scoped_refptr<net::IOBuffer> io_buffer,
                       int byte_count,
                       const std::string& address,
                       int port,
                       const CompletionCallback& callback) OVERRIDE;
   virtual bool GetPeerAddress(net::IPEndPoint* address) OVERRIDE;
   virtual bool GetLocalAddress(net::IPEndPoint* address) OVERRIDE;
   virtual Socket::SocketType GetSocketType() const OVERRIDE;
 
+  int JoinGroup(const std::string& address);
+  int LeaveGroup(const std::string& address);
+
+  int SetMulticastTimeToLive(int ttl);
+  int SetMulticastLoopbackMode(bool loopback);
+
+  int GetJoinedGroups(base::hash_set<std::string>& groups) const;
  protected:
   virtual int WriteImpl(net::IOBuffer* io_buffer,
                         int io_buffer_size,
                         const net::CompletionCallback& callback) OVERRIDE;
 
  private:
   // Make net::IPEndPoint can be refcounted
   typedef base::RefCountedData<net::IPEndPoint> IPEndPoint;
 
   void OnReadComplete(scoped_refptr<net::IOBuffer> io_buffer,
                       int result);
   void OnRecvFromComplete(scoped_refptr<net::IOBuffer> io_buffer,
                           scoped_refptr<IPEndPoint> address,
                           int result);
   void OnSendToComplete(int result);
 
   net::UDPSocket socket_;
 
   ReadCompletionCallback read_callback_;
 
   RecvFromCompletionCallback recv_from_callback_;
 
   CompletionCallback send_to_callback_;
+
+  base::hash_set<std::string> multicast_groups_;
 };
 
 }  //  namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_SOCKET_UDP_SOCKET_H_