[Jackaudio] Jack C++ midi structural considerations

I made a Prototype that uses jack directly now. I decided on working with Jack directly because I want to implement some features that would require rewriting parts of rtmidi or portaudio for my purposes. I want to enumerate ports and get raw ports, so I can have control over properties. I took a look into the rtmidi source, looking for the part how they get all the ports that jack knows about. I did nothing that would help me, so how could I do something about this?