Question

我是一名c＃程序员，我需要在c ++中实现一个多播套接字我试着谷歌搜索它并没有找到太多的帮助因此，如果有人能给我一些好的c ++多播套接字教程链接，我们将非常感激我的c＃套接字实现如下所示：

public class UdpMulticast
    {
        private Socket s;
        private Thread listenThread;
        private string mcastGroup;
        private int port;

        public UdpMulticast(string mcastGroup, int port)
        {
            this.mcastGroup = mcastGroup;
            this.port = port; 
        }

        private void Listen()
        {
            while (true)
            {
                try
                {
                    byte[] b = new byte[1024];
                    Thread.Sleep(1);                    
                    int recv = s.Receive(b);
                    if (OnNewDataRecv != null)
                    {
                        byte[] tmp = new byte[recv];
                        for (int i = 0; i < recv; i++)
                        {
                            tmp[i] = b[i];
                        }
                        byte[] decByte = Encryption.Decrypt(tmp);
                        if(this.OnNewDataRecv !=null)
                            this.OnNewDataRecv(decByte, decByte.Length);                        
                    }

                    if (s == null)
                    {
                        break;
                    }
                }
                catch (ThreadAbortException)
                {
                    break;
                }
                catch (Exception ex)
                {

                    Console.WriteLine(ex.ToString());
                }
            }
        }

        public delegate void newData4Send(byte[] data, int dataLen);
        public event newData4Send OnNewDataRecv;

        public bool StartListen()
        {
            bool ret = false;
            try
            {
                if (s == null)
                {
                    s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
                }
                if (s != null)
                {
                    Console.WriteLine("PORT multi cast :" + port);
                    IPEndPoint ipep = new IPEndPoint(IPAddress.Any, port);
                    s.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, 1);
                    s.Bind(ipep);
                    IPAddress ip = IPAddress.Parse(mcastGroup);
                    s.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(ip, IPAddress.Any));
                    s.SetSocketOption(SocketOptionLevel.IP,
                            SocketOptionName.MulticastTimeToLive, int.Parse("1"));
                    listenThread = new Thread(new ThreadStart(Listen));
                    listenThread.IsBackground = true;
                }
                if (listenThread != null)
                    listenThread.Start();
                ret = true;
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
            return ret;
        }

        public void StopListen()
        {
            if (listenThread != null)
            {
                if (listenThread.IsAlive)
                {
                    listenThread.Abort();
                    listenThread = null;
                }
            }
            if (s != null)
            {
                s.Close();
                s = null;
            }
        }

        public void Send(byte[] data, int len)
        {
            if (s == null)
            {
                s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
            }

            if (s != null)
            {
                IPEndPoint ipep = new IPEndPoint(IPAddress.Parse(mcastGroup), port);
                byte[] encByte = Encryption.Encrypt(data);
                s.SendTo(encByte, encByte.Length, SocketFlags.None, ipep);
            }
            else Console.WriteLine("s is NULL");
        }
    }

我想我在wcf中找到了一些关于它的东西，但我找不到一个好的教程。

Answer 1

没有Socket类或者某事。类似于普通的C ++。我建议使用像Boost.Asio这样的框架。

http://www.boost.org/doc/libs/1_46_1/doc/html/boost_asio/examples.html

文档中有一个多播示例。

如何在c ++中实现组播套接字

1 个答案: