cloudflare/odoh-client-rs

Oblivious DoH client application written in Rust

odoh-client-rs

odoh-client-rs is a CLI Rust client that can be used to access resolvers running the Oblivious DNS over HTTPS (ODoH) protocol draft-06. It is built using the odoh-rs library. It is mainly intended for testing as it can only send one request at a time.

Example usage

The proxy and resolver are configured using the file specified by the -c flag, e.g., -c config.toml. The default configuration can be found at tests/config.toml. It uses https://odoh.cloudflare-dns.com, i.e., 1.1.1.1, as the target resolver, and a well known endpoint to retrieve the configs via GET requests.

$ cargo run -- example.com AAAA

odoh-client-rs's Issues

Update to latest odoh-rs version

odoh-rs moved to the version 0x0001 recently. We should update this client library to match.

Fetching odohconfig should not be limited to 1.1.1.1

Clean up HTTPS answer parsing

It's currently somewhat hacky. Once upstream support for HTTPS resource record parsing lands, we can clean this up and properly parse out the odohconfig SvcbParam value from DNS.

Cryptic "Error: io error: failed to fill whole buffer" error

The example currently fails to run with a cryptic error message. Perhaps some more context could be added? For example, did an error occur while fetching the odohconfig from DNS, or while parsing the ODoH proxy response?

$ cargo run -- example.com AAAA
    Finished dev [unoptimized + debuginfo] target(s) in 0.39s
     Running `target/debug/odoh-client-rs example.com AAAA`
Error: io error: failed to fill whole buffer