ASP.Net, MVC - Get Client MAC ID

ASP.Net, MVC  - Get Client MAC ID

Below code gives client's mac id...

using System.Runtime.InteropServices;
 
namespace Demo.Common
{
    public class GetMACid
    {
        [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);
 
        public static string getID()
        {
            string mac_dest = "";
            try
            {
                string userip = HttpContext.Current.Request.UserHostAddress;
                string strClientIP = HttpContext.Current.Request.UserHostAddress.ToString().Trim();
                Int32 ldest = inet_addr(strClientIP);
                Int32 lhost = inet_addr("");
                Int64 macinfo = new Int64();
                Int32 len = 6;
                int res = SendARP(ldest, 0, ref macinfo, ref len);
                string mac_src = macinfo.ToString("X");
                
                while (mac_src.Length < 12)
                {
                    mac_src = mac_src.Insert(0, "0");
                }
 
               
 
                for (int i = 0; i < 11; i++)
                {
                    if (0 == (i % 2))
                    {
                        if (i == 10)
                        {
                            mac_dest = mac_dest.Insert(0, mac_src.Substring(i, 2));
                        }
                        else
                        {
                            mac_dest = "-" + mac_dest.Insert(0, mac_src.Substring(i, 2));
                        }
                    }
                }
            }
            catch (Exception err)
            {
                return err.Message;
            }
            return mac_dest;
        }
    }
}

Enjoy !!!

:)