using System;

using System.Collections.Generic;

using System.Text;

using System.Net;

using System.Text.RegularExpressions;

using System.Net.Sockets;

//Cscan 3.1 PortScan Moudle

namespace CscanDLL

{

    public class scan

    {

        public static string run(string ip)

        {

            if (string.IsNullOrEmpty(ip))

                return "";

            else

            {

                if (K8CheckPort(ip, 21))

                    Console.Write(ip + "\t21 Open\r\n");

                if (K8CheckPort(ip, 80))

                    Console.Write(ip + "\t80 Open\r\n");

                if (K8CheckPort(ip, 1433))

                    Console.Write(ip + "\t1433 Open\r\n");

                if (K8CheckPort(ip, 3306))

                    Console.Write(ip + "\t3306 Open\r\n");

                if (K8CheckPort(ip, 1521))

                    Console.Write(ip + "\t1521 Open\r\n");

                if (K8CheckPort(ip, 3389))

                    Console.Write(ip + "\t3389 Open\r\n");

            }

            return "";

        }

        private static bool K8CheckPort(string ip, int Port)

        {

            //int Port = 21;

            IPAddress scanip = IPAddress.Parse(ip);

            IPEndPoint point = new IPEndPoint(scanip, Port);

            try

            {

                TcpClient tcp = new TcpClient();

                tcp.Connect(point);

                //Console.WriteLine(scanip + "\t" + Port + "\tOpen");

                return true;

            }

            catch (Exception ex)

            {

                //Console.WriteLine(scanip + "\t" + Port + "\tClose");

                return false;

            }

        }

    }

}