c# - 从默认网关获取mac地址？

Question

有没有办法使用 C# 将 mac 地址从默认网关解析出来？

更新我正在使用

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

但我觉得我错过了什么。

Answer 1

像这样的东西应该适合你，虽然你可能想添加更多的错误检查:

[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;
}