fix: reexport full dns module from iroh-relay

[Frando]

Description

We currently only export some types from iroh_relay::dns as iroh::dns. This means if you actually want to customize the DNS resolver you have to add a dependency on iroh_relay to your crate, because several of the types needed are currently not exported from iroh.

This fixes it by reexporting the whole iroh_relay::dns module as iroh::dns.

Also fixes a few doccomments.

Breaking Changes

Notes & open questions

Change checklist

• Self-review.
• Documentation updates following the style guide, if relevant.
• Tests if relevant.
• All breaking changes documented.
  • List all breaking changes in the above "Breaking Changes" section.
  • Open an issue or PR on any number0 repos that are affected by this breaking change. Give guidance on how the updates should be handled or do the actual updates themselves. The major ones are:
    • quic-rpc
    • iroh-gossip
    • iroh-blobs
    • dumbpipe
    • sendme

[github-actions]

Documentation for this PR has been generated and is available at: https://n0-computer.github.io/iroh/pr/3916/docs/iroh/

Last updated: 2026-02-09T15:02:31Z

[dignifiedquire]

I am sceptical of glob exports, how much would it be to make these explicit?

[Frando]

We can, it's just that we had this in the past and then forgot to update it when we added a new type in iroh_relay::dns that was used in a method of Resolver. So to prevent that I'd prefer a glob export. Or even just reexport the module?

[Frando]

We could just reexport the module and move the tests somewhere else.

[dignifiedquire]

maybe cc @ramfox who thought about exports the most

[Frando]

I pushed a commit that fully reexports the dns module. I think this is much cleaner.