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libp2p / rust-libp2p

The Rust Implementation of the libp2p networking stack.
https://libp2p.io
MIT License
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Support `/dnsaddr` in web environments (wasm-bindgen) #5531

Open oblique opened 2 months ago

oblique commented 2 months ago

Description

Enable DNS lookup for web environments (wasm-bindgen). This can be achieved with DNS over HTTPS.

Motivation

I want to be able to use /dnsaddr in web environments.

Requirements

There are two options to implement this:

  1. libp2p-dns needs to be internally refactored to hide hickory types from WASM. Also we need to decide if we are going to support DoH to native systems as well, or if it will be just for WASM.
  2. Create libp2p-dns-websys. The bad thing about this is to reimplement all the retry logic. The good part about this is that we need to implement support only for /dnsaddr since /dns can be handled well by *-websys transprots.

Examples of querying DoH:

Lookup for IPv4

curl --header 'accept: application/dns-json' 'https://1.1.1.1/dns-query?type=1&name=cloudflare.com'

Lookup for IPv6

curl --header 'accept: application/dns-json' 'https://1.1.1.1/dns-query?type=28&name=cloudflare.com'

Lookup for TXT

curl --header 'accept: application/dns-json' 'https://1.1.1.1/dns-query?type=16&name=cloudflare.com'

Open questions

No response

Are you planning to do it yourself in a pull request ?

Maybe

dariusc93 commented 2 months ago

I have attempted this myself a few months ago but couldnt really settle on how I would want but do think we could go with 2, which would keep inline with what we are doing now.

DougAnderson444 commented 1 month ago

+1

(I just opened #5619 for this same thing, so I will close that as it's duplicate of this issue)