Pre-Proxy stage

I want to change the attributes in the pre proxy stage, but I want to do some sql stuff.  Basically I want to do a sql query get the data and then by what I get from the database, tack that on to the realm.  So it will proxy a different realm.  If I add sql to the radiusd.conf it says there

Disconnect Log

I am looking to perform a sql query when a user disconnects.  Does anyone know where exactly I could do this, or what type of packet is sent when a user disconnects?   Thanks,   Chris

Authorization Process?

I was wondering where at in the code are the value pairs entered into the packet.  E.G.  If I send a packet where the User-Name is “blah” and the Calling-Station-Id is “blah2”, when can I first use the method pairfind(vp, paired) to find the valuepair.  Any help would be great.   Thanks,