DNS server/client
- https://github.com/mnezerka/dnslib - Simple C++ library designed for encoding and decoding of DNS protocol packets, no networking
- http://www.yonch.com/uncategorized/dns-resolver-libraries - overview of available libraries
- https://routley.io/tech/2017/12/28/hand-writing-dns-messages.html - tutorial on dns packet content
- http://www.corpit.ru/mjt/udns.html - stub DNS resolver library with ability to perform both syncronous and asyncronous DNS queries