struct   sockaddr_in   addr;
  

  int   n   =   1;
  

  

  if   ((fd   =   socket(PF_INET,   SOCK_DGRAM,   IPPROTO_UDP))   <   0)   {
  

  DEBUG(LOG_ERR,   "socket   call   failed:   %s ",   sys_errlist[errno]);
  

  return   -1;
  

  }
  

  

  memset(&addr;,   0,   sizeof(addr));
  

  addr.sin_family   =   AF_INET;
  

  addr.sin_port   =   htons(port);
  

  addr.sin_addr.s_addr   =   ip;
  

  if   (bind(fd,   (struct   sockaddr   *)&addr;,   sizeof(struct   sockaddr))   ==   -1)   {
  

  close(fd);
  

  return   -1;
  

  }