accounting & Interim-Update's on freeradius

[Joao Miguel Ferreira]

Hello all,
        
        I'm a bit confuse here..... 
        
        1)
        --------------------------------------------
        is it possible for a freeradius setup,
        runnging on a NAS system, via some authentication module,
        determine the
        traffic produced by a given user and autonomouslly send the
        Start,
        Interim-Update and Stop records to some _other_ Accounting
        Radius
        server ?
        
        
        
        Something like this:
        
        user1 --\ 
        user2 ------<-->--|NAS w/ freeradius|-<------>-[Internet,
        www, ...]
        user3 --/            \
                              \
                               \ traffic records 
                                \
                                 \
                        |freeradius accounting|
        --------------------------------------------------------------------
        
        2) if that is not possible, is there any kind of freeradius API
        for Linux (C++/Perl... ?!) that one can use in order to send
        such traffic accounting records ?
        ---------------------------------------------
        
        
        Cheers
        joao