func doHostByAddr(_data)
  if(linked(Result))
    println(host, ' = gethostbyaddr(', IP, ');')
    event(onHostByAddr, host)
  else
    event(onHostByAddr, 'gethostbyaddr(' && IP && ')')
  end 
end

func Result()
  if(linked(doHostByAddr))
    return(host)
  else
    return('gethostbyaddr(' && IP && ')')
  end
end