使用ARP获取局域网内设备IP和MAC地址

根据Arp列表数据，查询本地设备在线状态

使用 arp -a 获得所有内网地址，首先看Mod对象

    public struct MacIpPair
    {
        public string HostName;
        public string MacAddress;
        public string IpAddress;

        public override string ToString()
        {
            string str = "";
            str += $"HostName:{HostName}\t{IpAddress}\t{MacAddress}";
            return str;
        }

    }

其次看看查询方法：

        public List<MacIpPair> GetAllMacAddressesAndIppairs()
        {
            List<MacIpPair> mip = new List<MacIpPair>();
            System.Diagnostics.Process pProcess = new System.Diagnostics.Process();
            pProcess.StartInfo.FileName = "arp";
            pProcess.StartInfo.Arguments = "-a ";
            pProcess.StartInfo.UseShellExecute = false;
            pProcess.StartInfo.RedirectStandardOutput = true;
            pProcess.StartInfo.CreateNoWindow = true;
            pProcess.Start();
            string cmdOutput = pProcess.StandardOutput.ReadToEnd();
            string pattern = @"(?<ip>([0-9]{1,3}\.?){4})\s*(?<mac>([a-f0-9]{2}-?){6})";

            foreach (Match m in Regex.Matches(cmdOutput, pattern, RegexOptions.IgnoreCase))
            {
                mip.Add(new MacIpPair()
                {
                    MacAddress = m.Groups["mac"].Value,
                    IpAddress = m.Groups["ip"].Value
                });
            }

            return mip;
        }

在写个调用就可以了：

    class Program
    {
        static void Main(string[] args)
        {
            var arp = new Comm.ArpHelper();
            var i = arp.GetLocalIpInfo();
            Console.WriteLine(i.ToString());

            var l = arp.GetAllMacAddressesAndIppairs();
            l.ForEach(x =>
            {
                //Console.WriteLine($"IP:{x.IpAddress}    Mac:{x.MacAddress}");
                Console.WriteLine(x.ToString());
            });

            Console.WriteLine("\r\n==================================================\r\n");

            Console.WriteLine("本地网卡信息:");
            Console.WriteLine(arp.GetLocalIpInfo() + " == " + arp.getLocalMac());

            string ip = "192.168.68.42";
            Console.Write("\n\r远程 " + ip + " 主机名信息:");
            var hName = arp.GetRemoteHostName(ip);
            Console.WriteLine(hName);

            Console.WriteLine("\n\r远程主机 " + hName + " 网卡信息:");
            string[] temp = arp.getRemoteIP(hName);
            for (int j = ; j < temp.Length; j++)
            {
                Console.WriteLine("远程IP信息:" + temp[j]);
            }

            Console.WriteLine("\n\r远程主机MAC :");
            Console.WriteLine(arp.getRemoteMac("192.168.68.21", "192.168.68.255"));
            Console.WriteLine(arp.getRemoteMac("192.168.68.21", "192.168.68.44"));

            Console.ReadKey();
        }
    }

出处：https://segmentfault.com/q/1010000008600333/a-1020000011467457

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c# 通过发送arp包获取ip等信息

利用dns类和WMI规范获取IP及MAC地址

在C#编程中,要获取主机名和主机IP地址,是比较容易的.它提供的Dns类,可以轻松的取得主机名和IP地址.

示例:
string strHostName = Dns.GetHostName(); //得到本机的主机名
IPHostEntry ipEntry = Dns.GetHostByName(strHostName); //取得本机IP
string strAddr = ipEntry.AddressList[0].ToString(); //假设本地主机为单网卡

在这段代码中使用了两个类,一个是Dns类,另一个为IPHostEntry类,二者都存在于命名空间System.Net中.
Dns类主要是从域名系统(DNS)中检索关于特定主机的信息,上面的代码第一行就从本地的DNS中检索出本地主机名.
IPHostEntry类则将一个域名系统或主机名与一组IP地址相关联,它与DNS类一起使用,用于获取主机的IP地址组.
要获取远程主机的IP地址,其方法也是大同小异.

在获取了IP地址后,如果还需要取得网卡的MAC地址,就需要进一步探究了.
这里又分两种情况,一是本机MAC地址,二是远程主机MAC地址.二者的获取是完全不同的.
在获取本机的MAC地址时,可以使用WMI规范,通过SELECT语句提取MAC地址.在.NET框架中,WMI规范的实现定义在System.Management命名空间中.
ManagementObjectSearcher类用于根据指定的查询检索管理对象的集合
ManagementObjectCollection类为管理对象的集合,下例中由检索对象返回管理对象集合赋值给它.

示例:
ManagementObjectSearcher query =new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration") ;
ManagementObjectCollection queryCollection = query.Get();
foreach( ManagementObject mo in queryCollection )
{
   if(mo["IPEnabled"].ToString() == "True")
   mac = mo["MacAddress"].ToString();
}

获取远程主机的MAC地址时,需要借用API函数SendARP.该函数使用ARP协议,向目的主机发送ARP包,利用返回并存储在高速缓存中的IP和MAC地址对,从而获取远程主机的MAC地址.

示例:
Int32 ldest= inet_addr(remoteIP); //目的ip
Int32 lhost= inet_addr(localIP); //本地ip
try
{
   Int64 macinfo = new Int64();
   Int32 len = 6;
   int res = SendARP(ldest,0, ref macinfo, ref len); //发送ARP包
   return Convert.ToString(macinfo,16);
}
catch(Exception err)
{
   Console.WriteLine("Error:{0}",err.Message);
}
return 0.ToString();

但使用该方式获取MAC时有一个很大的限制,就是只能获取同网段的远程主机MAC地址.因为在标准网络协议下，ARP包是不能跨网段传输的，故想通过ARP协议是无法查询跨网段设备MAC地址的。

示例程序全部代码:

using System.Net;
using System;
using System.Management;
using System.Runtime.InteropServices;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;

    public class ArpHelper
    {

        [DllImport("Iphlpapi.dll")]
        private static extern int SendARP(Int32 dest, Int32 host, ref Int64 mac, ref Int32 length);
        [DllImport("Ws2_32.dll")]
        private static extern Int32 inet_addr(string ip);

        //使用arp -a命令获取ip和mac地址
        public List<MacIpPair> GetAllMacAddressesAndIppairs()
        {
            List<MacIpPair> mip = new List<MacIpPair>();
            System.Diagnostics.Process pProcess = new System.Diagnostics.Process();
            pProcess.StartInfo.FileName = "arp";
            pProcess.StartInfo.Arguments = "-a ";
            pProcess.StartInfo.UseShellExecute = false;
            pProcess.StartInfo.RedirectStandardOutput = true;
            pProcess.StartInfo.CreateNoWindow = true;
            pProcess.Start();
            string cmdOutput = pProcess.StandardOutput.ReadToEnd();
            string pattern = @"(?<ip>([0-9]{1,3}\.?){4})\s*(?<mac>([a-f0-9]{2}-?){6})";

            foreach (Match m in Regex.Matches(cmdOutput, pattern, RegexOptions.IgnoreCase))
            {
                mip.Add(new MacIpPair()
                {
                    MacAddress = m.Groups["mac"].Value,
                    IpAddress = m.Groups["ip"].Value
                });
            }

            return mip;
        }

        //获取本机的IP
        public MacIpPair GetLocalIpInfo()
        {
            string strHostName = Dns.GetHostName(); //得到本机的主机名
            IPHostEntry ipEntry = Dns.GetHostByName(strHostName); //取得本机IP
            string strAddr = ipEntry.AddressList[].ToString(); //假设本地主机为单网卡

            string mac = "";
            ManagementObjectSearcher query = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration");
            ManagementObjectCollection queryCollection = query.Get();
            foreach (ManagementObject mo in queryCollection)
            {
                if (mo["IPEnabled"].ToString() == "True")
                    mac = mo["MacAddress"].ToString();
            }

            return new MacIpPair { HostName = strHostName, IpAddress = strAddr, MacAddress = mac };
        }

        //获取本机的MAC
        public string getLocalMac()
        {
            string mac = null;
            ManagementObjectSearcher query = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration");
            ManagementObjectCollection queryCollection = query.Get();
            foreach (ManagementObject mo in queryCollection)
            {
                if (mo["IPEnabled"].ToString() == "True")
                    mac = mo["MacAddress"].ToString();
            }
            return (mac);
        }

        //根据主机名获取远程主机IP
        public string[] getRemoteIP(string RemoteHostName)
        {
            IPHostEntry ipEntry = Dns.GetHostByName(RemoteHostName);
            IPAddress[] IpAddr = ipEntry.AddressList;
            string[] strAddr = new string[IpAddr.Length];
            for (int i = ; i < IpAddr.Length; i++)
            {
                strAddr[i] = IpAddr[i].ToString();
            }
            return strAddr;
        }

        //根据ip获取远程主机名
        public string GetRemoteHostName(string ip)
        {
            var d = Dns.GetHostEntry(ip);
            return d.HostName;
        }

        //获取远程主机MAC
        public string getRemoteMac(string localIP, string remoteIP)
        {
            string res = "FFFFFFFFFFFF";
            Int32 rdest = inet_addr(remoteIP); //目的ip
            Int32 lhost = inet_addr(localIP); //本地ip 

            try
            {
                //throw new Exception();
                Int64 macinfo = new Int64();
                Int32 len = ;
                int sendRes = SendARP(rdest, lhost, ref macinfo, ref len);
                var mac = Convert.ToString(macinfo, );

                return formatMacAddres(mac);
            }
            catch (Exception err)
            {
                Console.WriteLine("Error:{0}", err.Message);
            }
            return formatMacAddres(res);
        }

        private string formatMacAddres(string macAdd)
        {
            StringBuilder sb = new StringBuilder();
            macAdd = macAdd.Length ==  ? "" + macAdd : macAdd;
            if (macAdd.Length == )
            {
                int i = ;
                while (i < macAdd.Length)
                {
                    string tmp = macAdd.Substring(i, ) + "-";
                    sb.Insert(, tmp);
                    //sb.Append(tmp, 0, tmp.Length);
                    i += ;
                }
            }
            else
            {
                sb = new StringBuilder("");
            }
            return sb.ToString().Trim('-').ToUpper();

        }

    }

出处：https://www.cnblogs.com/purplenight/articles/2688241.html

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C#通过SendARP()获取WinCE设备的Mac网卡物理地址

ARP(Address Resolution Protocol) 即 地址解析协议,是根据IP地址获取物理地址的一个TCP/IP协议。

SendARP(Int32 dest, Int32 host, out Int64 mac, out Int32 length)

①dest：访问的目标IP地址,既然获取本机网卡地址,写本机IP即可 这个地址比较特殊,必须从十进制点分地址转换成32位有符号整数  在C#中为Int32;

②host：源IP地址,即时发送者的IP地址,这里可以随便填写,填写Int32整数即可;

③mac：返回的目标MAC地址(十进制)，我们将其转换成16进制后即是想要的结果用out参数加以接收;

④length：返回的是pMacAddr目标MAC地址(十进制)的长度，用out参数加以接收。

如果使用的是C++或者C语言可以直接调用 inet_addr("192.168.0.×××")得到 参数dest 是关键

现在用C#来获取,首先需要导入"ws2_32.dll"这个库,这个库中存在inet_addr(string cp)这个方法,之后我们就可以调用它了。

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//首先，要引入命名空间：using System.Runtime.InteropServices; 1 using System.Runtime.InteropServices; //接下来导入C:\Windows\System32下的"ws2_32.dll"动态链接库,先去文件夹中搜索一下,文件夹中没有Iphlpapi.dll的在下面下载 2 [DllImport("ws2_32.dll")] 3 private static extern int inet_addr(string ip);//声明方法

Iphlpapi.dll的点击 这里 下载

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1

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//第二 调用方法 Int32 desc = inet_addr("192.168.0.××");   /*由于个别WinCE设备是不支持"ws2_32.dll"动态库的,所以我们需要自己实现inet_addr()方法   输入是点分的IP地址格式（如A.B.C.D)的字符串，从该字符串中提取出每一部分，为int,假设得到4个int型的A,B,C,D,   ,IP = D<<24 + C<<16 + B<<8 + A(网络字节序），即inet_addr(string ip)的返回结果, 我们也可以把该IP转换为主机字节序的结果，转换方法一样 A<<24 + B<<16 + C<<8 + D */

　　

网络字节序

主机字节序

接下来是完整代码

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using System; using System.Runtime.InteropServices; using System.Net; using System.Diagnostics; using System.Net.Sockets;   public class MacAddressDevice     {         [DllImport("Iphlpapi.dll")]         private static extern int SendARP(Int32 dest, Int32 host, ref Int64 mac, ref Int32 length);           //获取本机的IP         public static byte[] GetLocalIP()         {             //得到本机的主机名             string strHostName = Dns.GetHostName();             try             {                 //取得本机所有IP(IPV4 IPV6 ...)                 IPAddress[] ipAddress = Dns.GetHostEntry(strHostName).AddressList;                 byte[] host = null;                 foreach (var ip in ipAddress)                 {                     while (ip.GetAddressBytes().Length == 4)                     {                         host = ip.GetAddressBytes();                         break;                     }                     if (host != null)                         break;                 }                 return host;             }             catch (Exception)             {                 return null;             }           }           // 获取本地主机MAC地址         public static string GetLocalMac(byte[] ip)         { 　　　　　　　if(ip == null) 　　　　　　　return null;                  int host = (int)((ip[0]) + (ip[1] << 8) + (ip[2] << 16) + (ip[3] << 24));             try             {                 Int64 macInfo = 0;                 Int32 len = 0;                 int res = SendARP(host, 0, out macInfo, out len);                 return Convert.ToString(macInfo, 16);             }             catch (Exception err)             {                 Console.WriteLine("Error:{0}", err.Message);             }             return null;         }       } }

最终取得Mac地址

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//本机Mac地址 string Mac = GetLocalMac(GetLocalIP());   //得到Mac地址是小写的,或者前后次序颠倒的,自己转换为正常的即可。

出处：https://www.cnblogs.com/JourneyOfFlower/p/SendARP.html

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