C#通过本地IP获取本地MAC地址（多个接口）

Question

我的电脑有4个以太网接口（通过ipconfig /all获取信息）

例如：
1）IP：192.168.15.161，MAC：00-E2-4C-98-18-89
2）IP：172.168.11.126，MAC：00-FF-4C-98-18-44
3）IP：10.0.13.136，MAC：00-EE-89-98-13-44
4) IP: 195.22.18.146, MAC: 00-12-89-98-13-33

我需要一个函数，在给定 IP 时 returns MAC 地址。

例如getMacByIP("192.168.15.161")将return"00-E2-4C-98-18-89"

使用 arp 不适用于本地！

比如arp -a不会给本地地址加上MAC
所以所有像 here 这样的 questions/answers 都没有帮助我。

在问这个问题之前，我在互联网上搜索了很多。

编辑：

这个答案：（link）对我没有帮助

public static string GetMacAddressUsedByIp(string ipAddress)
    {
        var ips = new List<string>();
        string output;

        try
        {
            // Start the child process.
            Process p = new Process();
            // Redirect the output stream of the child process.
            p.StartInfo.UseShellExecute = false;

            p.StartInfo.RedirectStandardOutput = true;
            p.StartInfo.UseShellExecute = false;
            p.StartInfo.CreateNoWindow = true;
            p.StartInfo.FileName = "ipconfig";
            p.StartInfo.Arguments = "/all";
            p.Start();
            // Do not wait for the child process to exit before
            // reading to the end of its redirected stream.
            // p.WaitForExit();
            // Read the output stream first and then wait.
            output = p.StandardOutput.ReadToEnd();
            p.WaitForExit();

        }
        catch
        {
            return null;
        }

        // pattern to get all connections
        var pattern = @"(?xis) 
(?<Header>
     (\r|\n) [^\r]+ :  \r\n\r\n
)
(?<content>
    .+? (?= ( (\r\n\r\n)|($)) )
)";

        List<Match> matches = new List<Match>();

        foreach (Match m in Regex.Matches(output, pattern))
            matches.Add(m);

        var connection = matches.Select(m => new
        {
            containsIp = m.Value.Contains(ipAddress),
            containsPhysicalAddress = Regex.Match(m.Value, @"(?ix)Physical \s Address").Success,
            content = m.Value
        }).Where(x => x.containsIp && x.containsPhysicalAddress)
        .Select(m => Regex.Match(m.content, @"(?ix)  Physical \s address [^:]+ : \s* (?<Mac>[^\s]+)").Groups["Mac"].Value).FirstOrDefault();

        return connection;
    }

因为如果我使用的是中文版的Windows，Regex 将无法工作！

Answer 1

这是一个建议的解决方案，可以满足您的要求：

void Main()
{
    Console.WriteLine(GetMacByIP("192.168.15.161")); // will return "00-E2-4C-98-18-89"
}

public string GetMacByIP(string ipAddress)
{
    // grab all online interfaces
    var query = NetworkInterface.GetAllNetworkInterfaces()
        .Where(n =>
            n.OperationalStatus == OperationalStatus.Up && // only grabbing what's online
            n.NetworkInterfaceType != NetworkInterfaceType.Loopback)
        .Select(_ => new
        {
            PhysicalAddress = _.GetPhysicalAddress(),
            IPProperties = _.GetIPProperties(),
        });

    // grab the first interface that has a unicast address that matches your search string
    var mac = query
        .Where(q => q.IPProperties.UnicastAddresses
            .Any(ua => ua.Address.ToString() == ipAddress))
        .FirstOrDefault()
        .PhysicalAddress;

    // return the mac address with formatting (eg "00-00-00-00-00-00")
    return String.Join("-", mac.GetAddressBytes().Select(b => b.ToString("X2")));
}

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