FraudCapturer/FraudCapturer/Helpers/FirewallHelper.cs

using System.Net;

namespace FraudCapturer.Helpers;

internal class FirewallHelper
{
    public static void BlockIp(IPAddress? ipAddress)
    {
        if (ipAddress is null)
        {
            throw new ArgumentNullException(nameof(ipAddress));
        }

        lock (Program.IpStorePath)
        {
            AddRuleIfDoesnotExist(ipAddress);

            File.AppendAllText(Program.IpStorePath, $"{Environment.NewLine}{ipAddress}");

            string[] iPs = File.ReadAllLines(Program.IpStorePath);

            System.Diagnostics.Process process = new System.Diagnostics.Process();
            System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo
            {
                WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden,
                FileName = "cmd.exe",
                Arguments = $"/C netsh advfirewall firewall set rule name=\"{Program.AppName} IP Block\" new remoteIp={string.Join(',', iPs)}"
            };
            process.StartInfo = startInfo;
            _ = process.Start();
        }
    }

    public static void UnblockIp(IPAddress? ipAddress)
    {
        if (ipAddress is null)
        {
            throw new ArgumentNullException(nameof(ipAddress));
        }

        lock (Program.IpStorePath)
        {
            List<string> iPs = File.ReadAllLines(Program.IpStorePath).ToList();
            iPs.Remove(ipAddress.ToString());

            File.WriteAllLines(Program.IpStorePath, iPs);

            System.Diagnostics.Process process = new System.Diagnostics.Process();
            System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo
            {
                WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden,
                FileName = "cmd.exe",
                Arguments = $"/C netsh advfirewall firewall set rule name=\"{Program.AppName} IP Block\" new remoteIp={string.Join(',', iPs.ToArray())}"
            };
            process.StartInfo = startInfo;
            _ = process.Start();
        }
    }

    public static void AddRuleIfDoesnotExist(IPAddress ipAddress)
    {
        lock (Program.IpStorePath)
        {
            System.Diagnostics.Process process = new System.Diagnostics.Process();
            System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo
            {
                WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden,
                FileName = "cmd.exe",
                Arguments = $"/C netsh advfirewall firewall show rule name=\"{Program.AppName} IP Block\" >nul || netsh advfirewall firewall add rule name=\"{Program.AppName} IP Block\" dir=in interface=any action=block remoteIp={ipAddress} && netsh advfirewall firewall add rule name=\"{Program.AppName} IP Block\" dir=out interface=any action=block remoteIp={ipAddress}"
            };
            process.StartInfo = startInfo;
            _ = process.Start();
            process.WaitForExit();
        }
    }
}