freeradius function

Hello All, Is there a succinct way to describe how freeradius processes requests? sort of a high level overview? Like: The radiusd daemon is running and receives a valid request It parses out attributes passed in with the request ... and then... That is the point where I'd like some clarification... what files does it parse as it continues, etc...? Any takers? If this is documented somewhere and I missed it, I apologize. Regards, Lin Richardson