DC++

I am wondering what must I do, to be automatically banned for hub blooding. I am making some kind of a test client to understand the whole protocol thing and got banned for that reason. So, what am I doing wrong? Heres the protocol log. ..RECEIVED: $Lock J_QP@[qF58B992Q3M3>mlaWK[k:kuyo7]1MMOqXvE5?aq...

I know this has been already requested, but I would really like to know what are the possibilities of DC to know, if the file list has been changed since the last download of it. If it hasn't, there would not be a need to redownload it once again. When I'm adding popular files to my queue one by one...