Thomas Eizinger 9302331881 refactor(connlib): create new UDP socket for each DNS query (#6999) ...

This extracts the initial refactoring required for #6944. Currently,
`connlib` sends all DNS queries over the same UDP socket as all the p2p
traffic for gateways and relays. In an earlier design of `connlib`, we
already did something similar as we are doing here but using
`hickory_resolver` for the actual DNS resolution.

Instead of depending on hickory, we implement DNS resolution ourselves
by sending a UDP DNS query to the mapped upstream DNS server. There are
no retries, instead, we rely on the original DNS client to retry in case
a packet gets lost on the way.

Modelling recursive DNS queries as explicit events from the
`ClientState` is necessary for implement DNS over TCP and DNS over
HTTPS. In both cases, the query to the upstream server isn't as simple
as emitting a `Transmit`. By modelling the query as an `async fn` within
`Io`, it will be possible to perform them all in one place.

Resolves: #6297.

2024-10-11 22:33:22 +00:00

..

src

refactor(connlib): create new UDP socket for each DNS query (#6999)

2024-10-11 22:33:22 +00:00

Cargo.toml

build(deps): converge Rust quinn dependency (#6314)

2024-08-16 02:06:18 +00:00