[iolib-devel] socket-of?

I've been trying to use the multiplexer and am ambiguous as to two things:

event-base appears to be a class which the user must instanciate. I assume that this is to allow extending the class to allow using user data like kqueue does via the udata to have those passed around to event handlers? If so, it's interesting that the event handler functions do not get this object passed along, and that a custom lambda function should pass it to another level of custom handler functions.

The event handler functions are provided an fd rather than a socket. Is there an easy provided way to obtain the associated socket from an fd, or must a custom index or hash table be used for this?

Thanks,