Expert Rust Implementation: Custom DNS Resolver with No LibrariesExpert Rust Implementation: Custom DNS Resolver with No Libraries
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Chaitanya 's avatar
Chaitanya Bajpai
• Feb 26
Rebuilt DNS resolution in Rust, no DNS libraries. Features: • Iterative delegation traversal • Wire-format packet encoding/decoding • Name compression handling • EDNS0 support • TTL-aware caching • NXDOMAIN/SERVFAIL handling • Cold vs warm cache benchmarks Blog: https://medium.com/@cb7chaitanya/building-a-dns-resolver-from-scratch-in-rust-683f84fb7304 Github: https://github.com/cb7chaitanya/networking/tree/main/dns-resolver

medium.com

Building a DNS Resolver from Scratch in Rust

A Deep Dive into Iterative Resolution, Wire Formats, Caching, and Concurrency

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