如何使用C#获取IP地址的物理(MAC)地址？

Question

从C#开始,我想做相同的以下内容:

arp -a |findstr 192.168.1.254

或者,答案可以调用SendARP函数并获得结果.

这将允许我的应用程序执行一些需要MAC地址的其他处理.

Answer 1

SendARP P/Invoke是这样的:

[DllImport("iphlpapi.dll", ExactSpelling=true)]
public static extern int SendARP( int destIp, int srcIP, byte[] macAddr, ref uint physicalAddrLen );

PInvoke.NET有这个例子:

IPAddress dst = IPAddress.Parse("192.168.2.1"); // the destination IP address

byte[] macAddr = new byte[6];
uint macAddrLen = (uint)macAddr.Length;

if (SendARP(BitConverter.ToInt32(dst.GetAddressBytes(), 0), 0, macAddr, ref macAddrLen) != 0)
     throw new InvalidOperationException("SendARP failed.");

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

Console.WriteLine(string.Join(":", str));