Question

我想使用boost asio（udp）将数据多播到系统中存在的所有网卡。任何人都可以帮助我理解如何做到这一点。我创建了以下示例，但它不起作用。发送到每个套接字的流数据混合在一起，输出是单个接口上所有套接字数据的混合。

//例假设发送到Interface1的数据是“Abcd”（注意：每个接口都有一个单独的套接字）

发送到Interface2的数据是“xyz”

然后输出仅从Interface1接收，输出混合（例如“abxycdz”或“abxcdzy”等）

请帮助我理解这个问题。

for(int i=0;i<NoOfInterfcaes;i++)
{
   Open("229.1.1.1",1000,sNetInterfcaeAddList[i],false);

}

....................................


for(int i=0;i<NoOfInterfcaes;i++)
{
   send(dataBuffer,len);

}

....................................

void Open(std::string &multicastIp,int nPort, std::string& sNetInterfcaeIpAdd,bool broadcast)
{

   m_sNetInterfcaeIpAdd=sNetInterfcaeIpAdd;
   m_sMulticastIp=multicastIp;
   m_nport = nPort;
   m_broadcast = broadcast ;
   // try and open socket
   const ip::udp::resolver::query queryIF( ip::udp::v4(),multicastIp.c_str(), nPort ); 
   ///resolve the connection
   m_resolver.async_resolve(queryIF,
                            boost::bind(&handle_resolve, this,
                                         boost::asio::placeholders::error,
                                         boost::asio::placeholders::iterator));

}
void handle_resolve(const boost::system::error_code& err,
                                       boost::asio::ip::udp::resolver::iterator endpoint_iterator)
{
   if (!err)
   {
      //make a connection
      m_socket.async_connect(*endpoint_iterator,
                              boost::bind(&handle_connect, this,
                                          boost::asio::placeholders::error, endpoint_iterator));
   }
   else
   {
      //error message
   }
}
void handle_connect(const boost::system::error_code& error,
                                       boost::asio::ip::udp::resolver::iterator endpoint_iterator)
{
   if (!error)
   {

      //Select the network adaptor
      m_socket.set_option( boost::asio::ip::multicast::outbound_interface( boost::asio::ip::address_v4::from_string(m_sNetInterfcaeIpAdd)));
      m_socket.set_option( boost::asio::ip::multicast::enable_loopback(false));
      if(m_broadcast)
      {
         boost::asio::socket_base::broadcast option(true);
         m_socket.set_option(option);
      }
   }
   else if (endpoint_iterator != boost::asio::ip::udp::resolver::iterator())
   {
      // The connection failed. Try the next endpoint in the list.
      m_socket.close();
      //try to connect
      m_socket.async_connect(*endpoint_iterator,
                              boost::bind(&handle_connect, this,
                                          boost::asio::placeholders::error, endpoint_iterator));
   }
   else
   {
      //
   }
}

Answer 1

每个适配器使用一个套接字，使用此问题中的代码将每个套接字绑定到其适配器：Boost asio socket multicast to a specific ethernet interface

使用boost asio在系统中多播UDP数据包到多个接口（多个网络适配器）

1 个答案: