查看端口连接状态

 

 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Net.NetworkInformation;

using System.ServiceModel.Description;

using System.Text;

using System.Threading.Tasks;



namespace Client

{

    class Program

    {

        static void Main(string[] args)

        {

            var portList = new List<int>();

            portList.Add(3389);

            portList.Add(5900);

            portList.Add(1500);



            var portDic = GetConnectionsStatus(portList);



            foreach (var kvp in portDic)

            {

                Console.WriteLine("如下端口已经建立连接， 连接信息为：port = {0}, remote = {1}", kvp.Key, GetHostNameByIp(kvp.Value.Address.ToString()));

            }  

          

            Console.WriteLine();

            Console.ReadLine();

        }



        public static Dictionary<int, IPEndPoint> GetConnectionsStatus(List<int> portList)

        {

            var myDictionary = new Dictionary<int, IPEndPoint>();



            var properties = IPGlobalProperties.GetIPGlobalProperties();

            var connections = properties.GetActiveTcpConnections();

            string ip = GetLocalIp();



            foreach (var t in connections)

            {

                if (t.State == TcpState.Established

                  && t.LocalEndPoint.Address.ToString() == ip

                && portList.Contains(t.LocalEndPoint.Port))

                {

                    myDictionary.Add(t.LocalEndPoint.Port, t.RemoteEndPoint);

                }

            }

            return myDictionary;

        }



        static string GetLocalIp()

        {

            string hostname = Dns.GetHostName();//得到本机名   

            IPHostEntry localhost = Dns.GetHostByName(hostname);//只得到IPv4的地址   

            //IPHostEntry localhost = Dns.GetHostEntry(hostname);//IPv4和IPV6地址

            IPAddress localaddr = localhost.AddressList[0];

            return localaddr.ToString();

        }



        public static string GetHostNameByIp(string ip)

        {

            ip = ip.Trim();

            if (ip == string.Empty)

                return string.Empty;

            try

            {

                // 是否 Ping 的通

                //if (this.Ping(ip))

               // {

                    System.Net.IPHostEntry host = System.Net.Dns.GetHostEntry(ip);

                    return host.HostName;

              // }

                //else

                 //   return string.Empty;

            }

            catch (Exception)

            {

                return string.Empty;

            }

        }

    }

}