Hello.
I'm doing my thesis project on advanced authentication techniques. I want to use freeRADIUS to implement extensions regarding one or more of the following:
1)Location-based authentication
2)Prepay codes for timed access
3)QoS parameters (allocate network resources according to the user's services)

Do you think these extensions are 'doable' for a beginner?
What are the major steps in implementing a new module? From what I've understood so far, I have to create a .c file and add some attributes to the dictionary. Is implementing new message types difficult? (does the finite-state machine need to be modified?)

Any advice/information/tips are greatly welcome. Thanks!