A pure OCaml implementation of the DNS protocol supporting authoritative and recursive resolvers with strict conventions.
ocaml-dns is a Domain Name System (DNS) library implemented in OCaml that provides both authoritative and recursive DNS resolver functionality. It solves the need for a reliable, standards-compliant DNS implementation that can be used to build custom DNS servers and clients with a focus on correctness and security.
OCaml developers and system builders who need to implement DNS functionality in their applications, particularly those working with MirageOS unikernels or requiring a pure functional DNS library.
Developers choose ocaml-dns for its strict adherence to functional programming principles, comprehensive RFC support including modern security extensions, and its modular design that allows minimal dependencies for specific use cases.
OCaml implementation of the DNS protocol
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Uses immutable data structures and explicit error handling without mutations or exceptions, ensuring robust and predictable behavior as per the library's strict conventions.
Implements a wide range of DNS RFCs including DNSSEC, TSIG, and modern extensions like DNS Cookies and SVCB records, detailed in the extensive supported RFCs list.
Split into multiple opam packages (e.g., dns-client, dns-server) to minimize runtime dependencies, allowing developers to include only necessary components.
Provides a specific backend for building unikernel DNS servers, ideal for secure and efficient embedded systems within the MirageOS ecosystem.
Does not support older resource record types like ISDN or MAILA, and some RFCs are only partially implemented, which may limit interoperability in certain environments.
Requires installation of OCaml and opam, and versions pre-4.0.0 have breaking changes that necessitate code rewriting, adding to the initial overhead and learning curve.
Only supports the IN (Internet) resource class, which could be restrictive for specialized applications needing other classes like CH or HS.