Cheat Engine

[Robotex]

I'm currently writing a server with support of mysql, but I'm currently stuck on the design part of the main class.
Currently, the main class has the sql, network and clientmanager classes as member data, and this last one has a vector of client classes wich parse the packets.
When the client parses the packet, it needs to retrieve data from the database, but the database member is only in the main class..

I think I could fix that by deriving the client class from the main class but I don't think that's a good design..

Any idea?