尽管所有数据包都到达，但 C# UDP 数据包丢失 (WireShark)

编程入门行业动态更新时间:2024-10-25 01:23:44

本文介绍了尽管所有数据包都到达，但 C# UDP 数据包丢失 (WireShark)的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！问题描述

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

As the title says I have a problem with UDP in C#. I'm trying to build a library for the rcon protocol of the game DayZ.

我的问题是我没有收到我应该收到的每个数据包.发送命令后，服务器回复一个拆分答案.数据包头包含总数据包计数和当前数据包的索引.现在，如果我应该得到 17 个数据包，我的应用程序中只会得到 8-15 个数据包.

My problem is that I dont receive every packet I should receive. After sending a command the server replies with an split answer. The packet header contains the total packet count and the index of the current packet. Now if I should get 17 packets I only get 8-15 packets in my application.

在使用 WireShark 进行测试后，我现在知道所有包裹都到达了我的计算机上.他们只是没有得到我的应用程序或类似的东西的认可.

After testing with WireShark I know now that all packages arrive on my computer. They just dont get recognized by my application or something like that.

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?或者为什么会这样?

My Actual Question is: Is it possible to prevent losing the packages between my network card and my application? or Why does that happen?

这是我当前的代码.它很脏，因为我在没有按预期工作后把它撕开了:

Here is my current code. Its pretty dirty because I ripped it apart after not working as expected:

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) { } } } } }

推荐答案

这通常是因为你没有足够快地使用你的数据报，所以内核套接字缓冲区已满，网络堆栈开始丢弃新到达的数据包.几点:

This is usually because you are not consuming your datagrams fast enough, so in-kernel socket buffer gets full and the network stack starts dropping newly arriving packets. Some points: