在C#中获取机器MAC地址的可靠方法

Question

无论使用C#运行的操作系统如何,我都需要一种获取机器MAC地址的方法.应用程序需要在XP/Vista/Win7 32和64位以及这些操作系统上运行,但具有外语默认值.许多C#命令和OS查询不能在OS上运行.有任何想法吗？我一直在抓取"ipconfig/all"的输出,但这非常不可靠,因为每台机器的输出格式都不同.

谢谢

Answer 1

更清洁的解决方案

var macAddr = 
    (
        from nic in NetworkInterface.GetAllNetworkInterfaces()
        where nic.OperationalStatus == OperationalStatus.Up
        select nic.GetPhysicalAddress().ToString()
    ).FirstOrDefault();

要么:

String firstMacAddress = NetworkInterface
    .GetAllNetworkInterfaces()
    .Where( nic => nic.OperationalStatus == OperationalStatus.Up && nic.NetworkInterfaceType != NetworkInterfaceType.Loopback )
    .Select( nic => nic.GetPhysicalAddress().ToString() )
    .FirstOrDefault();

Answer 2

这是一些C#代码,它返回第一个可操作网络接口的MAC地址.假设NetworkInterface程序集是在其他操作系统上使用的运行时(即Mono)中实现的,那么这将适用于其他操作系统.

新版本:以最快的速度返回NIC,该速度也具有有效的MAC地址.

/// <summary>
/// Finds the MAC address of the NIC with maximum speed.
/// </summary>
/// <returns>The MAC address.</returns>
private string GetMacAddress()
{
    const int MIN_MAC_ADDR_LENGTH = 12;
    string macAddress = string.Empty;
    long maxSpeed = -1;

    foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
    {
        log.Debug(
            "Found MAC Address: " + nic.GetPhysicalAddress() +
            " Type: " + nic.NetworkInterfaceType);

        string tempMac = nic.GetPhysicalAddress().ToString();
        if (nic.Speed > maxSpeed &&
            !string.IsNullOrEmpty(tempMac) &&
            tempMac.Length >= MIN_MAC_ADDR_LENGTH)
        {
            log.Debug("New Max Speed = " + nic.Speed + ", MAC: " + tempMac);
            maxSpeed = nic.Speed;
            macAddress = tempMac;
        }
    }

    return macAddress;
}

原始版本:只返回第一个.

/// <summary>
/// Finds the MAC address of the first operation NIC found.
/// </summary>
/// <returns>The MAC address.</returns>
private string GetMacAddress()
{
    string macAddresses = string.Empty;

    foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
    {
        if (nic.OperationalStatus == OperationalStatus.Up)
        {
            macAddresses += nic.GetPhysicalAddress().ToString();
            break;
        }
    }

    return macAddresses;
}

我不喜欢这种方法的唯一方法是,如果您喜欢Nortel Packet Miniport或某种类型的VPN连接,它有可能被选中.据我所知,没有办法区分实际物理设备的MAC与某种类型的虚拟网络接口.

Answer 3

Win32_NetworkAdapterConfiguration WMI类的MACAddress属性可以为您提供适配器的MAC地址.(System.Management命名空间)

MACAddress

    Data type: string
    Access type: Read-only

    Media Access Control (MAC) address of the network adapter. A MAC address is assigned by the manufacturer to uniquely identify the network adapter.

    Example: "00:80:C7:8F:6C:96"

如果您不熟悉WMI API(Windows Management Instrumentation),那么.NET应用程序的概述很好.

使用.Net运行时,所有版本的Windows都可以使用WMI.

这是一个代码示例:

System.Management.ManagementClass mc = default(System.Management.ManagementClass);
ManagementObject mo = default(ManagementObject);
mc = new ManagementClass("Win32_NetworkAdapterConfiguration");

ManagementObjectCollection moc = mc.GetInstances();
    foreach (var mo in moc) {
        if (mo.Item("IPEnabled") == true) {
              Adapter.Items.Add("MAC " + mo.Item("MacAddress").ToString());
         }
     }

Answer 4

如果您连接的计算机是Windows计算机,WMI是最佳解决方案,但如果您正在查看Linux,Mac或其他类型的网络适配器,那么您将需要使用其他东西.以下是一些选项:

1. 使用DOS命令nbtstat -a.创建一个进程,调用此命令,解析输出.
2. 首先Ping IP以确保您的NIC在其ARP表中缓存该命令,然后使用DOS命令arp -a.像选项1一样解析过程的输出.
3. 在iphlpapi.dll中使用可怕的非托管调用sendarp

下面是项目#3的样本.如果WMI不是一个可行的解决方案,这似乎是最好的选择:

using System.Runtime.InteropServices;
...
[DllImport("iphlpapi.dll", ExactSpelling = true)]
        public static extern int SendARP(int DestIP, int SrcIP, byte[] pMacAddr, ref uint PhyAddrLen);
...
private string GetMacUsingARP(string IPAddr)
{
    IPAddress IP = IPAddress.Parse(IPAddr);
    byte[] macAddr = new byte[6];
    uint macAddrLen = (uint)macAddr.Length;

    if (SendARP((int)IP.Address, 0, macAddr, ref macAddrLen) != 0)
        throw new Exception("ARP command failed");

    string[] str = new string[(int)macAddrLen];
    for (int i = 0; i < macAddrLen; i++)
        str[i] = macAddr[i].ToString("x2");

    return string.Join(":", str);
}

为了给予应有的信用,这是该代码的基础:http: //www.pinvoke.net/default.aspx/iphlpapi.sendarp#

Answer 5

恕我直言，返回第一个 mac 地址并不是一个好主意，尤其是在托管虚拟机时。因此，我检查发送/接收的字节总和并选择最常用的连接，这并不完美，但应该是正确的 9/10 次。

public string GetDefaultMacAddress()
{
    Dictionary<string, long> macAddresses = new Dictionary<string, long>();
    foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
    {
        if (nic.OperationalStatus == OperationalStatus.Up)
            macAddresses[nic.GetPhysicalAddress().ToString()] = nic.GetIPStatistics().BytesSent + nic.GetIPStatistics().BytesReceived;
    }
    long maxValue = 0;
    string mac = "";
    foreach(KeyValuePair<string, long> pair in macAddresses)
    {
        if (pair.Value > maxValue)
        {
            mac = pair.Key;
            maxValue = pair.Value;
        }
    }
    return mac;
}

Answer 6

我们使用WMI来获取具有最低度量的接口的mac地址,例如接口窗口将更喜欢使用,如下所示:

public static string GetMACAddress()
{
    ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration where IPEnabled=true");
    IEnumerable<ManagementObject> objects = searcher.Get().Cast<ManagementObject>();
    string mac = (from o in objects orderby o["IPConnectionMetric"] select o["MACAddress"].ToString()).FirstOrDefault();
    return mac;
}

或者在Silverlight中(需要提升信任度):

public static string GetMACAddress()
{
    string mac = null;
    if ((Application.Current.IsRunningOutOfBrowser) && (Application.Current.HasElevatedPermissions) && (AutomationFactory.IsAvailable))
    {
        dynamic sWbemLocator = AutomationFactory.CreateObject("WbemScripting.SWBemLocator");
        dynamic sWbemServices = sWbemLocator.ConnectServer(".");
        sWbemServices.Security_.ImpersonationLevel = 3; //impersonate

        string query = "SELECT * FROM Win32_NetworkAdapterConfiguration where IPEnabled=true";
        dynamic results = sWbemServices.ExecQuery(query);

        int mtu = int.MaxValue;
        foreach (dynamic result in results)
        {
            if (result.IPConnectionMetric < mtu)
            {
                mtu = result.IPConnectionMetric;
                mac = result.MACAddress;
            }
        }
    }
    return mac;
}

Answer 7

public static PhysicalAddress GetMacAddress()
{
    var myInterfaceAddress = NetworkInterface.GetAllNetworkInterfaces()
        .Where(n => n.OperationalStatus == OperationalStatus.Up && n.NetworkInterfaceType != NetworkInterfaceType.Loopback)
        .OrderByDescending(n => n.NetworkInterfaceType == NetworkInterfaceType.Ethernet)
        .Select(n => n.GetPhysicalAddress())
        .FirstOrDefault();

    return myInterfaceAddress;
}

Answer 8

您可以查找 NIC ID：

 foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces()) {
     if (nic.OperationalStatus == OperationalStatus.Up){
         if (nic.Id == "yay!")
     }
 }

它不是 MAC 地址，但它是一个唯一标识符，如果这就是您要查找的。

Answer 9

我需要获取用于连接到互联网的实际NIC的MAC; 确定在我的客户端应用程序中使用哪个WCF接口.

我在这里看到很多答案,但没有一个能帮助我.希望这个答案可以帮助一些人.

此解决方案返回用于连接到Internet的NIC的MAC.

private static PhysicalAddress GetCurrentMAC(string allowedURL)
{
  TcpClient client = new TcpClient();
  client.Client.Connect(new IPEndPoint(Dns.GetHostAddresses(allowedURL)[0], 80));
  while(!client.Connected)
  {
    Thread.Sleep(500);  
  }
  IPAddress address2 = ((IPEndPoint)client.Client.LocalEndPoint).Address;
  client.Client.Disconnect(false);
  NetworkInterface[] allNetworkInterfaces = NetworkInterface.GetAllNetworkInterfaces();
  client.Close();
  if(allNetworkInterfaces.Length > 0)
  {
    foreach(NetworkInterface interface2 in allNetworkInterfaces)
    {
      UnicastIPAddressInformationCollection unicastAddresses = interface2.GetIPProperties().UnicastAddresses;
      if((unicastAddresses != null) && (unicastAddresses.Count > 0))
      {
        for(int i = 0; i < unicastAddresses.Count; i++)
          if(unicastAddresses[i].Address.Equals(address2))
            return interface2.GetPhysicalAddress();
      }
    }
  }
  return null;
}

要调用它,您需要传递一个URL来连接到这样:

PhysicalAddress mac = GetCurrentMAC("www.google.com");