Exactly like that. My program is half-way there to doing NAT hole-punching, a bunch of other stuff is missing and I'm deep into yak-shaving right now the likes

Exactly like that. My program is half-way there to doing NAT hole-punching, a bunch of other stuff is missing and I'm deep into yak-shaving right now the likes of you wouldn't even believe, but I have had good progress the last few months. (Been tinkering for years, finally decided to do a serious effort. The commit log goes back years but for long periods very silent.)