I guess the title says it all. I know for a fact, even without checking first, that blueprints would not be able to establish an ad-hoc network over wifi 
Any ideas or advice on where to start would be appreciated! (Oh, and also, once I get the c++ to do this, how would I implement it to be exposed to BP?
It would need to follow something like this:
- Search / Listen for available peers
- Send Request to Connect to peer
- Peer accepts connection
- Each peer sends and receives a random integer, whoever “wins” becomes the Server, all other peers are clients
- Establish traditional LAN sessions / multiplayer