c# - 如何在UWP中获取单播，Dns和网关地址？

我正在尝试在Windows IOT中找到单播，Dns和网关地址。
通常，我可以使用NetworkInterface.GetAllNetworkInterfaces()方法访问这些值。

但是在UWP中，缺少该方法。

是否有其他选择来获取这些值？

最佳答案

您可以尝试使用PInvoke中的Iphlpapi.dll方法。有几种方法可能包含您要查找的单播，Dns和网关信息，例如GetInterfaceInfo()，GetAdaptersInfo()，GetAdaptersAdresses()等。请在此处查看可用方法的完整列表:IP Helper Functions - MSDN。最终可能需要一种以上的方法。

作为有关此操作的示例，以下是PInvoke.Net检索本地计算机中接口(interface)名称的一些示例代码，这些代码已实现为标准UWP应用:

public sealed partial class MainPage : Page
{
    public MainPage()
    {
        this.InitializeComponent();
    }

    private void Page_Loaded(object sender, RoutedEventArgs e)
    {
        List<string> list = new List<string>();

        IP_INTERFACE_INFO ips = Iphlpapi.GetInterfaceInfo();

        list.Add(string.Format("Adapter count = {0}", ips.NumAdapters));

        foreach (IP_ADAPTER_INDEX_MAP ip in ips.Adapter)
            list.Add(string.Format("Index = {0}, Name = {1}", ip.Index, ip.Name));

        listView1.ItemsSource = list;
    }
}

// PInvoke
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct IP_ADAPTER_INDEX_MAP
{
    public int Index;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = PInvokes.MAX_ADAPTER_NAME)]
    public String Name;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct IP_INTERFACE_INFO
{
    public int NumAdapters;
    public IP_ADAPTER_INDEX_MAP[] Adapter;

    public static IP_INTERFACE_INFO FromByteArray(Byte[] buffer)
    {
        unsafe
        {
            IP_INTERFACE_INFO rv = new IP_INTERFACE_INFO();
            int iNumAdapters = 0;
            Marshal.Copy(buffer, 0, new IntPtr(&iNumAdapters), 4);
            IP_ADAPTER_INDEX_MAP[] adapters = new IP_ADAPTER_INDEX_MAP[iNumAdapters];
            rv.NumAdapters = iNumAdapters;
            rv.Adapter = new IP_ADAPTER_INDEX_MAP[iNumAdapters];
            int offset = sizeof(int);
            for (int i = 0; i < iNumAdapters; i++)
            {
                IP_ADAPTER_INDEX_MAP map = new IP_ADAPTER_INDEX_MAP();
                IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf(map));
                Marshal.StructureToPtr(map, ptr, false);
                Marshal.Copy(buffer, offset, ptr, Marshal.SizeOf(map));
                //map = (IP_ADAPTER_INDEX_MAP)Marshal.PtrToStructure(ptr, typeof(IP_ADAPTER_INDEX_MAP));
                map = Marshal.PtrToStructure<IP_ADAPTER_INDEX_MAP>(ptr);
                Marshal.FreeHGlobal(ptr);
                rv.Adapter[i] = map;
                offset += Marshal.SizeOf(map);
            }
            return rv;
        }
    }
}

internal class PInvokes
{
    public const int MAX_ADAPTER_NAME = 128;

    public const int ERROR_INSUFFICIENT_BUFFER = 122;
    public const int ERROR_SUCCESS = 0;

    [DllImport("Iphlpapi.dll", CharSet = CharSet.Unicode)]
    public static extern int GetInterfaceInfo(Byte[] PIfTableBuffer, ref int size);

    [DllImport("Iphlpapi.dll", CharSet = CharSet.Unicode)]
    public static extern int IpReleaseAddress(ref IP_ADAPTER_INDEX_MAP AdapterInfo);
}

public class Iphlpapi
{
    public static IP_INTERFACE_INFO GetInterfaceInfo()
    {
        int size = 0;
        int r = PInvokes.GetInterfaceInfo(null, ref size);
        Byte[] buffer = new Byte[size];
        r = PInvokes.GetInterfaceInfo(buffer, ref size);
        if (r != PInvokes.ERROR_SUCCESS)
            throw new Exception("GetInterfaceInfo returned an error.");
        IP_INTERFACE_INFO info = IP_INTERFACE_INFO.FromByteArray(buffer);
        return info;
    }
}