mirrors/arti.git/crates/tor-proto/src/congestion/params.rs, branch arti-v1.4.5

tor-proto: Remove no-longer needed clone()s.

2025-06-11T17:48:35Z

This doesn't really change anything, but removing the `.clone()` makes it a bit more obvious that copying the `*Params` is a lightweight operation.

tor-proto: Derive Copy for FixedWindowParams.

2025-06-11T17:40:46Z

tor-proto: Derive Copy for VegasParams.

2025-06-11T17:15:00Z

proto: Refactor cc fallback.

2025-06-10T15:52:28Z

The fallback CC algorithm is _always_ fixed-window, and we should only use it when the selected CC algorithm is not supported.

Move responsibility for choosing extensions into tor-proto

2025-06-10T15:52:28Z

Now tor-circmgr no longer needs to check which Protover capabilities are enabled, or construct a separate CircParameters for each hop. Instead, tor-proto decides whether to use the fallback CC mode, based on whether the target supports FLOWCTRL_CC. Closes #1967.

proto: Split CircParameters and NegotiatedHopSettings

2025-06-10T15:52:28Z

One type will now represent _the kind of hop we are asking tor-proto to negotiate_; the other will represent _the state of such negotiation_. This doesn't simplify the code much yet, but it will be helpful as we add more and more negotiable settings. Part of #1967

tor-proto: expand docs for `CongestionWindowParams::set_sendme_inc`

2025-04-23T18:38:25Z

tests: Add CC ntorv3 negotiation unit test

2025-04-23T18:36:28Z

Also add one for the sendme_inc validity function. Part of #1817 Signed-off-by: David Goulet

circ: Apply possible subprotocol changes to circ params

2025-04-23T18:36:28Z

Congestion control can change the circuit parameters if the relay we are negotiating with doesn't support FlowCtrl=2. This commit adds a function in the circuit builder that will apply any changes to the circuit parameters of the hop based on the hop protocol values. For now, only congestion control applies. Part of #1817 Signed-off-by: David Goulet

congestion: Setup a fallback algorithm in the params

2025-04-23T18:36:28Z

CircParameters is built before path selection and thus once we start building the hops, we can't access the consensus values that were used to build it in the first place. For congestion control, we require a fallback algorithm in case the hop doesn't support FlowCtrl=2. This commit adds a "fallback_alg" to the CC parameters which will be used for this exact case. Part of #1817 Signed-off-by: David Goulet