mirrors/arti.git/crates/tor-proto/src/tunnel/circuit.rs, branch arti-v1.4.2

tor-proto: begin using `TargetHop` and `HopLocation`

2025-03-11T14:53:15Z

This doesn't yet change the public API, it just begins the work of plumbing these around throughout `ClientCirc`, `Reactor`, etc. This can't be broken up into smaller commits without causing build failures.

tor-proto: add a non-pub `ClientCirc::legs()` method

2025-03-11T14:53:15Z

tor-proto: Use a ConfluxSet in the circuit reactor.

2025-02-25T11:14:57Z

This is the first step toward supporting traffic splitting in the circuit reactor. While the logic has changed slightly to support handling circuits instead of just one, the reactor still only supports `ConfluxSet`s of size 1, so this should effectively be a no-op. In the future, this code will be extended to support the conflux-specific cells and to implement the conflux proto. The code uses `ConfluxSet::primary_leg()` and `ConfluxSet::single_leg()` somewhat interchangeably. This is not *currently* a problem because`primary_leg()` is the same as `single_leg()` for single path tunnels, but we will need to adjust some of these call sites when we add support for multipath tunnels (I have left a `TODO(conflux)` for every dubious call site). This commit also makes `CtrlMsg::FirstHopClockSkew` fallible: if the reactor is multipath, it will return `Err(Bug(..))` to the caller (this error is returned to the caller over the `answer` channel; it does *not* shut down the reactor)

tor-proto: Add a tunnel module.

2025-02-20T20:15:12Z

Move StreamTarget to the tunnel module and the circuit module. From now on streams will be implemented on tunnels, not circuits. This moves `StreamTarget` to the tunnel module. A future change will replace `ClientCirc` with `ClientTunnel` inside `StreamTarget`. This is mostly code motion, best reviewed with `--color-moved`. Signed-off-by: David Goulet