利用WPCAP函数，模拟ARP请求数据包，发送并监听ARP回复响应

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using SharpPcap;

using SharpPcap.Protocols;

using SharpPcap.Packets;

using SharpPcap.Util;

using System.Net;

namespace ArpSender

{

    class Program

    {

        static IPAddress localIP;

        static IPAddress targetIP;

        //初始化ARP请求包的方法

        static ARPPacket getARPPacket(System.Net.IPAddress targetIP, string localMAC, System.Net.IPAddress localIP)

        {

            ARPPacket arp = new ARPPacket(14, new byte[60]);

            arp.ARPHwLength = 6;

            arp.ARPHwType = ARPFields_Fields.ARP_ETH_ADDR_CODE;

            arp.ARPProtocolLength = 4;

            arp.ARPProtocolType = ARPFields_Fields.ARP_IP_ADDR_CODE;

            arp.ARPSenderHwAddress = localMAC;

            arp.ARPSenderProtoAddress = localIP;

            arp.SourceHwAddress = localMAC;

            arp.EthernetProtocol = EthernetPacket.EtherType.ARP;

            arp.ARPOperation = ARPFields_Fields.ARP_OP_REQ_CODE;

            arp.ARPTargetHwAddress = "00:00:00:00:00:00";

            arp.ARPTargetProtoAddress = targetIP;

            arp.DestinationHwAddress = "ff:ff:ff:ff:ff:ff";

            return arp;

        }

        static void Main(string[] args)

        {

            //获得网络设备列表，并选择将要发送请求的设备

            List<PcapDevice> devices = SharpPcap.Pcap.GetAllDevices();

            foreach (PcapDevice d in devices)

            {

                Console.WriteLine(d.Name);

                Console.WriteLine(d.Description);

                foreach (Pcap.PcapAddress addr in d.Addresses)

                {

                    Console.WriteLine(addr.ToString());

                }

                Console.WriteLine();

            }

            Console.WriteLine("请选择将要监控的设备：");

            int deviceIndex = Console.Read() - 48;

            PcapDevice device = devices[deviceIndex];

            localIP = device.Addresses[0].Addr.ipAddress;

            targetIP = IPAddress.Parse("192.168.1.1");

            string localMac = "00-1B-B9-DC-56-57";

            device.Open(false,-1);

            //为网络设备增加包到达事件

            device.OnPacketArrival += new Pcap.PacketArrivalEvent(device_OnPacketArrival);

            device.SetFilter("arp");

            //初始化一个ARP请求包

            ARPPacket p = getARPPacket(targetIP, localMac, localIP);

            Console.WriteLine(DateTime.Now);

            Console.WriteLine("发送ARP包：" + p);

            //发送ARP请求包

            device.SendPacket(p);

            device.StartCapture();

            Console.ReadKey();

            device.StopCapture();

            device.Close();

        }

        //检测到包到达时进行的操作

        static void device_OnPacketArrival(object sender, Packet packet)

        {

            ARPPacket arp = (ARPPacket)packet;

            if (arp.ARPOperation == 2 & arp.ARPSenderProtoAddress.Equals(targetIP) & arp.ARPTargetProtoAddress.Equals(localIP))

            {

                Console.WriteLine(DateTime.Now);

                Console.WriteLine("接收回复包：" + arp);

            }

        }

    }

}