using System.Net;
using System;
using System.Management;
using System.Runtime.InteropServices;

public class getIP
{
    [DllImport("Iphlpapi.dll")]
    private static extern int SendARP(Int32 dest, Int32 host, ref Int64 mac, ref Int32 length);
    [DllImport("Ws2_32.dll")]
    private static extern Int32 inet_addr(string ip);

    //獲取本機的IP

    public string getLocalIP()
    {
        string strHostName = Dns.GetHostName(); //得到本機的主機名

        IPHostEntry ipEntry = Dns.GetHostByName(strHostName); //取得本機IP

        string strAddr = ipEntry.AddressList[0].ToString();
        return (strAddr);
    }
    //獲取本機的MAC

    public string getLocalMac()
    {
        string mac = null;
        ManagementObjectSearcher query = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration");
        ManagementObjectCollection queryCollection = query.Get();
        foreach (ManagementObject mo in queryCollection)
        {
            if (mo["IPEnabled"].ToString() == "True")
                mac = mo["MacAddress"].ToString();
        }
        return (mac);
    }

    //獲取遠端主機IP

    public string[] getRemoteIP(string RemoteHostName)
    {
        IPHostEntry ipEntry = Dns.GetHostByName(RemoteHostName);
        IPAddress[] IpAddr = ipEntry.AddressList;
        string[] strAddr = new string[IpAddr.Length];
        for (int i = 0; i < IPADDR.LENGTH; I++)
        {
            strAddr[i] = IpAddr[i].ToString();
        }
        return (strAddr);
    }
    //獲取遠端主機MAC

    public string getRemoteMac(string localIP, string remoteIP)
    {
        Int32 ldest = inet_addr(remoteIP); //目的ip 

        Int32 lhost = inet_addr(localIP); //本地ip


        try
        {
            Int64 macinfo = new Int64();
            Int32 len = 6;
            int res = SendARP(ldest, 0, ref macinfo, ref len);
            return Convert.ToString(macinfo, 16);
        }
        catch (Exception err)
        {
            Console.WriteLine("Error:{0}", err.Message);
        }
        return 0.ToString();
    }


    public static void Main(string[] args)
    {
        getIP gi = new getIP();
        Console.WriteLine("本地網絡卡資訊:");
        Console.WriteLine(gi.getLocalIP() + " - " + gi.getLocalMac());

        Console.WriteLine("\n\r遠端網絡卡資訊:");
        string[] temp = gi.getRemoteIP("scmobile-tj2");
        for (int i = 0; i < TEMP.LENGTH; I++)
        {
            Console.WriteLine(temp[i]);
        }
        Console.WriteLine(gi.getRemoteMac("192.168.0.3", "192.168.0.1"));
    }
}