Insert billiplan code in radacct table during authenticaiton

[Bishal]

Hi all,

       I am using freeradius for AAA of my cable users. Now what I want
to do is, insert billiplan code 001 into radacct table during
authentication so that I can view online users according to billingplan
code. There will be Billingplan field in radcheck table and when users
tries to login the script will check the radcheck table and update that
billingplan code into radacct table.
 Is it possible with rlm_perl module?

Thank you
Bishal