通过IP/MAC 获取局域网中对应 MAC/IP

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;

namespace FindServerTest
{
public class IPMacMapper
{
private static List<IPAndMac> list;

private static StreamReader ExecuteCommandLine(String file, String arguments = "")
{
ProcessStartInfo startInfo = new ProcessStartInfo();
startInfo.CreateNoWindow = true;
startInfo.WindowStyle = ProcessWindowStyle.Hidden;
startInfo.UseShellExecute = false;
startInfo.RedirectStandardOutput = true;
startInfo.FileName = file;
startInfo.Arguments = arguments;

Process process = Process.Start(startInfo);

return process.StandardOutput;
}

private static void InitializeGetIPsAndMac()
{
if (list != null)
return;

var arpStream = ExecuteCommandLine("arp", "-a");
List<string> result = new List<string>();
while (!arpStream.EndOfStream)
{
var line = arpStream.ReadLine().Trim();
result.Add(line);
}

list = result.Where(x => !string.IsNullOrEmpty(x) && (x.Contains("dynamic") || x.Contains("static") || x.Contains("动态") || x.Contains("静态")))
.Select(x =>
{
string[] parts = x.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
return new IPAndMac { IP = parts[0].Trim(), MAC = parts[1].Trim() };
}).ToList();
}

public static string FindIPFromMacAddress(string macAddress)
{
InitializeGetIPsAndMac();
IPAndMac item = list.SingleOrDefault(x => x.MAC == macAddress);
if (item == null)
return null;
return item.IP;
}

public static string FindMacFromIPAddress(string ip)
{
InitializeGetIPsAndMac();
IPAndMac item = list.SingleOrDefault(x => x.IP == ip);
if (item == null)
return null;
return item.MAC;
}

private class IPAndMac
{
public string IP { get; set; }
public string MAC { get; set; }
}
}
}

用法

string ipAddress = IPMacMapper.FindIPFromMacAddress(mac);