从默认网关获取mac地址？

发布于 2024-08-19 11:43:22 字数 218 浏览 17 评论 0原文

有没有办法使用 C# 解析默认网关的 mac 地址？

更新我的工作，

var x = System.Net.NetworkInformation.NetworkInterface.GetAllNetworkInterfaces()[0].GetIPProperties().GatewayAddresses;

但我觉得我错过了一些东西。

原文

Is there a way to resolve the mac address off the default gateway using c#?

update im working with

var x = System.Net.NetworkInformation.NetworkInterface.GetAllNetworkInterfaces()[0].GetIPProperties().GatewayAddresses;

but I feel like I'm missing something.

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紫瑟鸿黎 2024-08-26 11:43:22

尽管您可能想添加更多错误检查，但类似这样的东西应该适合您：

[DllImport("iphlpapi.dll", ExactSpelling = true)]
public static extern int SendARP(uint destIP, uint srcIP, byte[] macAddress, ref uint macAddressLength);

public static byte[] GetMacAddress(IPAddress address)
{
  byte[] mac = new byte[6];
  uint len = (uint)mac.Length;      
  byte[] addressBytes = address.GetAddressBytes();      
  uint dest = ((uint)addressBytes[3] << 24) 
    + ((uint)addressBytes[2] << 16) 
    + ((uint)addressBytes[1] << 8) 
    + ((uint)addressBytes[0]);      
  if (SendARP(dest, 0, mac, ref len) != 0)
  {
    throw new Exception("The ARP request failed.");        
  }
  return mac;
}

Something like this should work for you, although you probably want to add more error checking:

[DllImport("iphlpapi.dll", ExactSpelling = true)]
public static extern int SendARP(uint destIP, uint srcIP, byte[] macAddress, ref uint macAddressLength);

public static byte[] GetMacAddress(IPAddress address)
{
  byte[] mac = new byte[6];
  uint len = (uint)mac.Length;      
  byte[] addressBytes = address.GetAddressBytes();      
  uint dest = ((uint)addressBytes[3] << 24) 
    + ((uint)addressBytes[2] << 16) 
    + ((uint)addressBytes[1] << 8) 
    + ((uint)addressBytes[0]);      
  if (SendARP(dest, 0, mac, ref len) != 0)
  {
    throw new Exception("The ARP request failed.");        
  }
  return mac;
}

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眼角的笑意。 2024-08-26 11:43:22

您真正想要的是执行地址解析协议 (ARP) 请求。
有好的方法，也有不太好的方法来做到这一点。

使用 .NET 框架中现有的方法（尽管我怀疑它是否存在）
编写自己的 ARP 请求方法（可能比您想要的工作更多）
使用托管库（如果存在）
使用非托管库（例如 iphlpapi. WMI示例
如果您知道只需要远程获取网络中远程 Windows 计算机的 MAC 地址，您可以使用 Windows Management Instrumentation (WMI)

：

using System;
using System.Management;

namespace WMIGetMacAdr
{
    class Program
    {
        static void Main(string[] args)
        {
            ManagementScope scope = new ManagementScope(@"\\localhost");  // TODO: remote computer (Windows WMI enabled computers only!)
            //scope.Options = new ConnectionOptions() { Username = ...  // use this to log on to another windows computer using a different l/p
            scope.Connect();

            ObjectQuery query = new ObjectQuery("SELECT * FROM Win32_NetworkAdapterConfiguration"); 
            ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query);

            foreach (ManagementObject obj in searcher.Get())
            {
                string macadr = obj["MACAddress"] as string;
                string[] ips = obj["IPAddress"] as string[];
                if (ips != null)
                {
                    foreach (var ip in ips)
                    {
                        Console.WriteLine("IP address {0} has MAC address {1}", ip, macadr );
                    }
                }
            }
        }
    }
}

What you really want is to perform an Adress Resolution Protocol (ARP) request.
There are good and not soo good ways to do this.

Use an existing method in the .NET framework (though I doubt it exists)
Write your own ARP request method (probably more work than you're looking for)
Use a managed library (if exists)
Use an unmanaged library (such as iphlpapi.dll as suggested by Kevin)
If you know you only need remote to get the MAC adress of a remote Windows computer within your network you may use Windows Management Instrumentation (WMI)

WMI example:

using System;
using System.Management;

namespace WMIGetMacAdr
{
    class Program
    {
        static void Main(string[] args)
        {
            ManagementScope scope = new ManagementScope(@"\\localhost");  // TODO: remote computer (Windows WMI enabled computers only!)
            //scope.Options = new ConnectionOptions() { Username = ...  // use this to log on to another windows computer using a different l/p
            scope.Connect();

            ObjectQuery query = new ObjectQuery("SELECT * FROM Win32_NetworkAdapterConfiguration"); 
            ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query);

            foreach (ManagementObject obj in searcher.Get())
            {
                string macadr = obj["MACAddress"] as string;
                string[] ips = obj["IPAddress"] as string[];
                if (ips != null)
                {
                    foreach (var ip in ips)
                    {
                        Console.WriteLine("IP address {0} has MAC address {1}", ip, macadr );
                    }
                }
            }
        }
    }
}

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