Feat: DNS record gossip #104
Description
We should have a way to exchange DNS records (like hyper://agregore.mauve.moe) with peers on the local network even if DNS is unavailable (e.g. local mesh networks / wifi hotspots).
- Expose muxer inside corestore when replicating inhyper-sdk
- Define protocol for doing an ASK for a hostname and a RESPONSE with either a public key for the hostname or empty buffer if they don't have the hostname
- When getting ASK, fetch the hostname from the DNS cache. Respond with the public key or empty buffer
- When failing to perform a DNS lookup (and not having a cached value), broadcast an ASK to all known peers and use either the first returned record or fail after a second.
This has the security risk that peers you're connected to can lie about the DNS key. We might want to wait for a quorum of peers to respond before choosing a key, or having some sort trusted set of peers. This should also have an opt out flag since it introduces a leak of which domains a peer might have visited before which could be used for fingerprinting or extracting info.