IPIP.net (Geoip) database file interface
To lookup in a given database, you need to parse the database file first and hold the results for later usage:
{ok, Database} = ipipdb:parse_database("/path/to/ipip.ipdb").
Using the returned database contents, you could start looking up
ipipdb:lookup("127.0.0.1", Database).
> {ok, #{}}