I'm sorry, the question is too long and I'm not good in English. Let's start again and i'll try to make it simple.
Situation for easy understanding:
1. I wanna develop a desktop files tranfers in Linux. The criteria that I want are:
a) it works based on workgroup which only person in the same workgroup can ask permission to
get file from he or she (other person on the same workgroup).
b) do not have any login when to request for a file.
(compared to Yahoo Messenger, it need user to login first before they can send any file only to
the person that their username exist in the user's list)
c) when a request was made by person A to person B in the same workgroup, the
interface(message dialog box) will appeart the person A PC's. It will show a text for example
"Are you sure want to get the file" and 2 button for 'continue' or to 'cancel'. On the otherhand,
the other pc's which is the person B PC's a dialog box will show "Are you sure want to send the
file" appear with 2 button for 'yes' or 'no' option.
p/s - The main point here is I don't wanna have to login to server which is YM must do.
Hope it will make you clear about what i wanna know and easy for you to help me