Internal use part

The first part consists of fields that the resource manager library uses to:

• determine the type of message sent from the client
• validate (ensure that the message is not spoofed)
• track access mode (used by helper functions)

To keep things simple, I recommend that you always use the helper functions (the iofunc_*_default() ones) in all connect functions. These will return a pass/fail indication, and after that point, you can then use the “End-user parameters” members within the connect function.