组播数据包:发送和接收问题

Question

在我改编一些多播教程时,我改变了发送数据包的方法.

在我的例子中,我创建了一个大小的数据包队列bytes[1024],然后通过Socket.Send()所有在线网络适配器发送它

问题:

发送时,另一个被调用的receiveMessage()方法正在一个单独的线程上运行.使用Socket.Bind(),它捕获数据包,但只捕获1个数据包.

我是否进行了太多处理,从而延迟(并丢失)收到的数据包？

UPDATE

我正在考虑为传入的数据包添加队列,因此1个线程捕获并存储,第二个处理数据包.

SendMethod

Socket _listener_socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

foreach (IPAddress localIP in Dns.GetHostAddresses(Dns.GetHostName()).Where(i => i.AddressFamily == AddressFamily.InterNetwork))
{
    //handle image and files                
    _listener_socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(_MultiIP, localIP));
    _listener_socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastTimeToLive, 1);
    _listener_socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
    _listener_socket.MulticastLoopback = true;
    _listener_socket.Connect(new IPEndPoint(_MultiIP, _PORT));

    int count = MSGS_TO_SEND.Count;

    while (count > 0)
    {
        count--;
        byte[] temp = (byte[])(MSGS_TO_SEND.Dequeue());
        _listener_socket.Send(temp, _BYTE_BUFFER_SIZE, SocketFlags.None);
        MSGS_TO_SEND.Enqueue(temp);
    }              

    //----------------------------------------------
    //-------------------SEND DATA------------------
    //----------------------------------------------
}

_listener_socket.Close();

接收方法

//initialise multicast group and bind to interface
Socket _sender_socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
IPEndPoint ipep = new IPEndPoint(IPAddress.Any, _PORT);
_sender_socket.Bind(ipep);

IPAddress localip = _MultiIP;
_sender_socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(localip, IPAddress.Any));

//{
while (_sender_socket.IsBound && !bStop)
{
    byte[] b = new byte[_BYTE_BUFFER_SIZE];
    _sender_socket.Receive(b);
    char[] chars = new char[_BYTE_BUFFER_SIZE];
    System.Buffer.BlockCopy(b, 0, chars, 0, b.Length);

    string _message = new string(chars).Trim();
    string ip = _message.Substring(0, _message.IndexOf("~"));
    _message = _message.Remove(0, _message.IndexOf("~") + 1);
    string _flag = _message.Substring(0, _message.IndexOf("~"));
    _message = _message.Remove(0, _message.IndexOf("~") + 1);

    _message = _message.Replace("\0", string.Empty);

    ip = "1.0";
    icount++;
    handleData(ip, _flag, _message);
}

Answer 1

如果您不想尝试，这里有一个完整的示例： https: //github.com/efaruk/playground/tree/master/Multicasting

如果您愿意，您可以在项目中使用这些可重用组件（MulticastSender、、 ）...MulticastReceiver