C# – Get mac address in Universal Apps

Hmmm I wrote something but I didn’t tested it on mobile device because I don’t have any at the moment but I tested it on my PC and Windows Mobile 10 emulator.

public static class AdaptersHelper
{
    const int MAX_ADAPTER_DESCRIPTION_LENGTH = 128;
    const int ERROR_BUFFER_OVERFLOW = 111;
    const int MAX_ADAPTER_NAME_LENGTH = 256;
    const int MAX_ADAPTER_ADDRESS_LENGTH = 8;
    const int MIB_IF_TYPE_OTHER = 1;
    const int MIB_IF_TYPE_ETHERNET = 6;
    const int MIB_IF_TYPE_TOKENRING = 9;
    const int MIB_IF_TYPE_FDDI = 15;
    const int MIB_IF_TYPE_PPP = 23;
    const int MIB_IF_TYPE_LOOPBACK = 24;
    const int MIB_IF_TYPE_SLIP = 28;

    [DllImport("iphlpapi.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
    public static extern int GetAdaptersInfo(IntPtr pAdapterInfo, ref Int64 pBufOutLen);

    public static List<AdapterInfo> GetAdapters()
    {
        var adapters = new List<AdapterInfo>();

        long structSize = Marshal.SizeOf(typeof(IP_ADAPTER_INFO));
        IntPtr pArray = Marshal.AllocHGlobal(new IntPtr(structSize));

        int ret = GetAdaptersInfo(pArray, ref structSize);

        if (ret == ERROR_BUFFER_OVERFLOW) // ERROR_BUFFER_OVERFLOW == 111
        {
            // Buffer was too small, reallocate the correct size for the buffer.
            pArray = Marshal.ReAllocHGlobal(pArray, new IntPtr(structSize));

            ret = GetAdaptersInfo(pArray, ref structSize);
        }

        if (ret == 0)
        {
            // Call Succeeded
            IntPtr pEntry = pArray;

            do
            {
                var adapter = new AdapterInfo();

                // Retrieve the adapter info from the memory address
                var entry = (IP_ADAPTER_INFO)Marshal.PtrToStructure(pEntry, typeof(IP_ADAPTER_INFO));

                // Adapter Type
                switch (entry.Type)
                {
                    case MIB_IF_TYPE_ETHERNET:
                        adapter.Type = "Ethernet";
                        break;
                    case MIB_IF_TYPE_TOKENRING:
                        adapter.Type = "Token Ring";
                        break;
                    case MIB_IF_TYPE_FDDI:
                        adapter.Type = "FDDI";
                        break;
                    case MIB_IF_TYPE_PPP:
                        adapter.Type = "PPP";
                        break;
                    case MIB_IF_TYPE_LOOPBACK:
                        adapter.Type = "Loopback";
                        break;
                    case MIB_IF_TYPE_SLIP:
                        adapter.Type = "Slip";
                        break;
                    default:
                        adapter.Type = "Other/Unknown";
                        break;
                } // switch

                adapter.Name = entry.AdapterName;
                adapter.Description = entry.AdapterDescription;

                // MAC Address (data is in a byte[])
                adapter.MAC = string.Join("-", Enumerable.Range(0, (int)entry.AddressLength).Select(s => string.Format("{0:X2}", entry.Address[s])));

                // Get next adapter (if any)

                adapters.Add(adapter);

                pEntry = entry.Next;
            }
            while (pEntry != IntPtr.Zero);

            Marshal.FreeHGlobal(pArray);
        }
        else
        {
            Marshal.FreeHGlobal(pArray);
            throw new InvalidOperationException("GetAdaptersInfo failed: " + ret);
        }

        return adapters;
    }

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
    public struct IP_ADAPTER_INFO
    {
        public IntPtr Next;
        public Int32 ComboIndex;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = MAX_ADAPTER_NAME_LENGTH + 4)]
        public string AdapterName;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = MAX_ADAPTER_DESCRIPTION_LENGTH + 4)]
        public string AdapterDescription;
        public UInt32 AddressLength;
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = MAX_ADAPTER_ADDRESS_LENGTH)]
        public byte[] Address;
        public Int32 Index;
        public UInt32 Type;
        public UInt32 DhcpEnabled;
        public IntPtr CurrentIpAddress;
        public IP_ADDR_STRING IpAddressList;
        public IP_ADDR_STRING GatewayList;
        public IP_ADDR_STRING DhcpServer;
        public bool HaveWins;
        public IP_ADDR_STRING PrimaryWinsServer;
        public IP_ADDR_STRING SecondaryWinsServer;
        public Int32 LeaseObtained;
        public Int32 LeaseExpires;
    }

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
    public struct IP_ADDR_STRING
    {
        public IntPtr Next;
        public IP_ADDRESS_STRING IpAddress;
        public IP_ADDRESS_STRING IpMask;
        public Int32 Context;
    }

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
    public struct IP_ADDRESS_STRING
    {
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
        public string Address;
    }
}

And my AdapterInfo class:

public class AdapterInfo
{
    public string Type { get; set; }

    public string Description { get; set; }

    public string Name { get; set; }

    public string MAC { get; set; }
}

source: http://www.pinvoke.net/default.aspx/iphlpapi/GetAdaptersInfo.html