在C#中捕获和编辑TCP/UDP数据包

using System;
using System.Net;
using System.Net.Sockets;

class Program
{
    static void Main()
    {
        // 创建TCP连接
        TcpClient client = new TcpClient("127.0.0.1", 8080);
        
        // 获取网络流
        NetworkStream stream = client.GetStream();
        
        // 接收数据
        byte[] buffer = new byte[1024];
        int bytesRead = stream.Read(buffer, 0, buffer.Length);
        
        // 将接收到的数据转换为字符串
        string data = System.Text.Encoding.ASCII.GetString(buffer, 0, bytesRead);
        
        // 编辑数据
        string editedData = "Hello, edited data!";
        
        // 将编辑后的数据转换为字节数组
        byte[] editedBuffer = System.Text.Encoding.ASCII.GetBytes(editedData);
        
        // 发送数据
        stream.Write(editedBuffer, 0, editedBuffer.Length);
        
        // 关闭连接
        client.Close();
    }
}

using System;
using System.Net;
using System.Net.Sockets;

class Program
{
    static void Main()
    {
        // 创建UDP连接
        UdpClient client = new UdpClient(8080);
        
        // 接收数据
        IPEndPoint remoteEP = new IPEndPoint(IPAddress.Any, 0);
        byte[] buffer = client.Receive(ref remoteEP);
        
        // 将接收到的数据转换为字符串
        string data = System.Text.Encoding.ASCII.GetString(buffer);
        
        // 编辑数据
        string editedData = "Hello, edited data!";
        
        // 将编辑后的数据转换为字节数组
        byte[] editedBuffer = System.Text.Encoding.ASCII.GetBytes(editedData);
        
        // 发送数据
        client.Send(editedBuffer, editedBuffer.Length, remoteEP);
        
        // 关闭连接
        client.Close();
    }
}