C#UDP数据包丢失虽然所有数据包都到达(WireShark)

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互联网集市收集整理的这篇技术教程文章主要介绍了C#UDP数据包丢失虽然所有数据包都到达(WireShark)，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含2922字，纯文字阅读大概需要5分钟。

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正如标题所说我在C#中遇到UDP问题.
我正在尝试为DayZ游戏的rcon协议构建一个库.

我的问题是我没有收到我应该收到的每一个数据包.
发送命令后,服务器回复分裂答案.包头包含总包数和当前包的索引.
现在,如果我应该获得17个数据包,我的应用程序中只能获得8-15个数据包.

在使用WireShark进行测试后,我现在知道所有包都到达了我的计算机.他们只是不被我的应用程序或类似的东西认可.

我的实际问题是：
是否可以防止丢失我的网卡和我的应用程序之间的包？要么
为什么会这样？

这是我目前的代码.它非常脏,因为我在没有按预期工作后撕开了它：

    private Socket _udpClient;
    private Thread _receiverThread;
    private Thread _workerThread;
    private Queue<byte[]> _packetQueue;
    private PacketBuffer[] MessageBuffer;
    private byte SenderSequence = 0;
    private IPEndPoint connection;

    public RCon(IPAddress ip, int port)
    {
        connection = new IPEndPoint(ip, port);
        _udpClient = new Socket(connection.Address.AddressFamily, SocketType.Dgram, ProtocolType.Udp);
        _udpClient.Connect(connection);
        MessageBuffer = new PacketBuffer[256];
        _packetQueue = new Queue<byte[]>();

        _receiverThread = new Thread(new ThreadStart(ReceiveCallback));
        _receiverThread.IsBackground = true;
        _receiverThread.Priority = ThreadPriority.AboveNormal;
        _receiverThread.Start();
        _workerThread = new Thread(new ThreadStart(WorkerCallback));
        _workerThread.IsBackground = true;
        _workerThread.Start();
    }

    public void Login(string password)
    {
        LoginPacket packet = new LoginPacket(password);

        _udpClient.Send(packet.Bytes);
    }

    public void SendCommand(string command)
    {
        CommandPacket packet = new CommandPacket(SenderSequence, command);
        SenderSequence++;

        _udpClient.Send(packet.Bytes);
    }

    private void ReceiveCallback()
    {

        while (true)
        {
                byte[] buffer = new byte[1036];
                if (_udpClient.Receive(buffer) > 0)
                    _packetQueue.Enqueue(buffer);
        }
    }

    private void WorkerCallback()
    {
        while (true)
        {
            if (_packetQueue.Count > 0)
            {
                byte[] buffer = _packetQueue.Dequeue();

                if (buffer != null)
                {
                    try
                    {
                        Packet receivedPacket = Packet.ParseIncoming(buffer);

                        OnPacketReceived(new PacketReceivedEventArgs(receivedPacket));

                        switch (receivedPacket.Type)
                        {
                            case PacketType.Message:
                                OnMessageReceived(new MessageReceivedEventArgs(receivedPacket.Content));
                                MessageCallbackPacket packet = new MessageCallbackPacket(receivedPacket.SequenceNumber);
                                _udpClient.Send(packet.Bytes);
                                break;
                            case PacketType.CommandCallback:
                                if (MessageBuffer[receivedPacket.SequenceNumber] == null)
                                    MessageBuffer[receivedPacket.SequenceNumber] = new PacketBuffer(receivedPacket);
                                else
                                    MessageBuffer[receivedPacket.SequenceNumber].AddPacket(receivedPacket);

                                if (MessageBuffer[receivedPacket.SequenceNumber].IsComplete)
                                    OnCommandCallback(new CommandCallbackEventArgs(MessageBuffer[receivedPacket.SequenceNumber].GetContent()));
                                break;
                        }
                    }
                    catch (ArgumentException) { }
                    catch (OverflowException) { }
                    catch (FormatException) { }
                }
            }
        }
    }

解决方法:

这通常是因为您没有足够快地使用数据报,因此内核中的套接字缓冲区已满,网络堆栈开始丢弃新到达的数据包.一些要点：

>增加套接字上的接收缓冲区,
>不要在每次迭代时获取锁定 – 尽可能多地读取,然后将数据放入队列,
>考虑非阻塞方法而不是线程.

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