使用SendArp来获取MAC地址

本文使用二种方式来获取mac address.

1.

  只能获取本机的.

 using System.Management;

 

ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");

            ManagementObjectCollection moc2 = mc.GetInstances();

            foreach (ManagementObject mo in moc2)

            {

                if ((bool)mo["IPEnabled"] == true)

                    this.textBox1.Text = mo["MacAddress"].ToString();

                mo.Dispose();

            }

2. 此种方法可以获取远程MAC地址

    using System.Runtime.InteropServices;

[DllImport("Iphlpapi.dll")]

        static extern int SendARP(Int32 DestIP, Int32 SrcIP, ref Int64 MacAddr, ref Int32 PhyAddrLen);

 

        [DllImport("Ws2_32.dll")]

        static extern Int32 inet_addr(string ipaddr);

 

        ///<summary>

        /// SendArp获取MAC地址

        ///</summary>

        ///<param name="RemoteIP">目标机器的IP地址如(192.168.1.1)</param>

        ///<returns>目标机器的mac 地址</returns>

 

        public static string GetMacAddress(string RemoteIP)

        {

            StringBuilder macAddress = new StringBuilder();

            try

            {

                Int32 remote = inet_addr(RemoteIP);

 

                Int64 macInfo = new Int64();

                Int32 length = 6;

                SendARP(remote, 0, ref macInfo, ref length);

 

                string temp = Convert.ToString(macInfo, 16).PadLeft(12, '0').ToUpper();

 

                int x = 12;

                for (int i = 0; i < 6; i++)

                {

                    if (i == 5)

                    {

                        macAddress.Append(temp.Substring(x - 2, 2));

                    }

                    else

                    {

                        macAddress.Append(temp.Substring(x - 2, 2) + "-");

                    }

                    x -= 2;

                }

 

                return macAddress.ToString();

            }

            catch

            {

                return macAddress.ToString();

            }

        }