This is adapted variant of exim-geoipv6-dlfunc.c from https://github.com/snabb/exim-geoipv6-dlfunc

https://lists.exim.org/lurker/message/20120707.161423.79af567d.en.html
https://dist.epipe.com/exim/
https://github.com/snabb/exim-geoipv6-dlfunc
https://github.com/snabb/exim-geoipv6-dlfunc.git