DNS/getdnsapiについて、ここに記述してください。
https://getdnsapi.net/slides/getdns-poster-IETF92.pdf
getdns is a modern asynchronous DNS API.
- It implements DNS entry points from a design developed and vetted by application developers, in an API specification.
https://getdnsapi.net/documentation/readme/
Hands on https://www.afnic.fr/medias/documents/JCSA/2017/1.JCSA17-hands-on-getdns.pdf
getaddrinfo() does not fit standards* any more