Module exposure 

Is a managed server reachable beyond loopback? The adapter passes --host 127.0.0.1, but the launcher and the server are not ours, so the binding is checked, not assumed: connect to every non-loopback address of this machine on the server’s port.

Functions

local_addrs

Non-loopback unicast addresses of this machine’s interfaces (IPv6 link-local addresses are skipped: they need a scope to connect to).

port_in_use

Whether something accepts connections on ip:port.

reachable_beyond_loopback

The local non-loopback addresses port answers on (empty: loopback only).