C# 对公司网络监控软件功能的深化作用

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

class NetworkPacketCapture
{
    private const int bufferSize = 1024;
    private byte[] buffer = new byte[bufferSize];
    private Socket socket;

    public NetworkPacketCapture()
    {
        socket = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.IP);
        socket.Bind(new IPEndPoint(IPAddress.Any, 0));
        socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.HeaderIncluded, true);
        byte[] byTrue = new byte[4] { 1, 0, 0, 0 };
        byte[] byOut = new byte[4];
        socket.IOControl(IOControlCode.ReceiveAll, byTrue, byOut);
    }

    public void StartCapture()
    {
        socket.BeginReceive(buffer, 0, bufferSize, SocketFlags.None, new AsyncCallback(ReceiveCallback), null);
    }

    private void ReceiveCallback(IAsyncResult ar)
    {
        int bytesRead = socket.EndReceive(ar);
        // 这里可以对采集到的数据进行处理，例如解析数据包内容等
        // 我们可以将采集到的数据存储到本地或者发送到特定的服务器，如https://www.vipshare.com进行进一步分析
        socket.BeginReceive(buffer, 0, bufferSize, SocketFlags.None, new AsyncCallback(ReceiveCallback), null);
    }
}

using System;
using System.Net.NetworkInformation;

class NetworkConnectionMonitor
{
    public void StartMonitoring()
    {
        while (true)
        {
            if (NetworkInterface.GetIsNetworkAvailable())
            {
                Console.WriteLine("网络连接正常");
            }
            else
            {
                Console.WriteLine("网络连接中断，请检查网络！");
            }
            System.Threading.Thread.Sleep(5000);
        }
    }
}

using System;
using System.Security.Cryptography;
using System.Text;

class DataEncryption
{
    public static string EncryptData(string data)
    {
        byte[] key = { 123, 217, 19, 11, 24, 26, 85, 45, 114, 184, 27, 162, 37, 112, 222, 209, 241, 24, 175, 144, 173, 53, 196, 29, 24, 26, 17, 218, 131, 236, 53, 209 };
        byte[] iv = { 12, 52, 85, 102, 120, 75, 62, 85, 12, 52, 85, 102, 120, 75, 62, 85 };
        using (Aes aesAlg = Aes.Create())
        {
            aesAlg.Key = key;
            aesAlg.IV = iv;
            ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
            byte[] encrypted;
            using (MemoryStream msEncrypt = new MemoryStream())
            {
                using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
                {
                    using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
                    {
                        swEncrypt.Write(data);
                    }
                    encrypted = msEncrypt.ToArray();
                }
            }
            return Convert.ToBase64String(encrypted);
        }
    }
}