Interprocess communication

Hello everyone.
I have a BIG problem.
About a month I try to make the communication between the client and my game launcher. I tried to use nanomsg library, but it does not work in conjunction with the engine (maybe I do not so something).

Please tell me if I could write my C language library(for windows and unix-system) on a shared memory to control and use it in the game and its launcher (launcher is a server on node.js)?

Maybe I can use for communication between the game and launcher standard TCP sockets of unreal engine? But I think they will be blocked by a firewall windows.