DNS Encoder, Decoder, and Server

hbo-dnsd (also known as dnsd) is a Node.js package providing functionalities for encoding and decoding DNS messages, as well as an API to run custom authoritative DNS servers. Currently at version 0.9.8, its development appears to have ceased around 2012, judging by the provided examples and the specified Node.js engine compatibility (>= 0.8). The package differentiates itself by offering direct programmatic control over DNS message structures as JavaScript objects, allowing developers to implement highly customized DNS resolution logic. It enables the creation of dynamic DNS responses based on request parameters, unlike static DNS server configurations. Due to its age, it relies solely on CommonJS modules and is not actively maintained, making it potentially incompatible with modern Node.js versions or ESM-first projects.