feat: switch to QUIC multipath #3381
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Documentation for this PR has been generated and is available at: https://n0-computer.github.io/iroh/pr/3381/docs/iroh/ Last updated: 2025-11-10T12:56:53Z |
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The nice thing is that the setting of PathInfo is now a lot more sane. The bad thing is that we are making random things in the Endpoint and MagicSock pub(crate).
When a new connection arrives that is direct, we should add the relay connection. Because the initial connection was probably racing direct and relay and direct won.
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This is replaced by the endpoint_two_relay_only_becomes_direct test.
This was a weird relic from the past. The state it maintains is much clearer without the inner. This also comments out the unused PathSelection for now. We do need to bring that back somehow though.
## Description This improves how we expose paths and path stats for connections, and also updates feat-multipath to use n0-computer/quinn#168. * The watcher for open paths internally uses a SmallVec to not allocate in the common case of not-too-many paths * The path info for a path now includes a boolean whether this is the currently selected primary transmission path * We no longer expose PathIds to users * We expose stats for paths from `Connection::path_stats` ## Breaking Changes <!-- Optional, if there are any breaking changes document them, including how to migrate older code. --> ## Notes & open questions <!-- Any notes, remarks or open questions you have to make about the PR. --> ## Change checklist <!-- Remove any that are not relevant. --> - [ ] Self-review. - [ ] Documentation updates following the [style guide](https://rust-lang.github.io/rfcs/1574-more-api-documentation-conventions.html#appendix-a-full-conventions-text), if relevant. - [ ] Tests if relevant. - [ ] All breaking changes documented. - [ ] List all breaking changes in the above "Breaking Changes" section. - [ ] Open an issue or PR on any number0 repos that are affected by this breaking change. Give guidance on how the updates should be handled or do the actual updates themselves. The major ones are: - [ ] [`quic-rpc`](https://github.com/n0-computer/quic-rpc) - [ ] [`iroh-gossip`](https://github.com/n0-computer/iroh-gossip) - [ ] [`iroh-blobs`](https://github.com/n0-computer/iroh-blobs) - [ ] [`dumbpipe`](https://github.com/n0-computer/dumbpipe) - [ ] [`sendme`](https://github.com/n0-computer/sendme) --------- Co-authored-by: Floris Bruynooghe <[email protected]>
## Description This has a few minor cleanups without any functional changes in the endpoint state actor: * Remove double handle upgrade * Add helper function `to_transport_addr` on the relay mapped addr map * Use hash map `entry` API instead of `get` and `expect` * Use `if let` chains to remove a level of indentation ## Breaking Changes <!-- Optional, if there are any breaking changes document them, including how to migrate older code. --> ## Notes & open questions <!-- Any notes, remarks or open questions you have to make about the PR. --> ## Change checklist <!-- Remove any that are not relevant. --> - [ ] Self-review. - [ ] Documentation updates following the [style guide](https://rust-lang.github.io/rfcs/1574-more-api-documentation-conventions.html#appendix-a-full-conventions-text), if relevant. - [ ] Tests if relevant. - [ ] All breaking changes documented. - [ ] List all breaking changes in the above "Breaking Changes" section. - [ ] Open an issue or PR on any number0 repos that are affected by this breaking change. Give guidance on how the updates should be handled or do the actual updates themselves. The major ones are: - [ ] [`quic-rpc`](https://github.com/n0-computer/quic-rpc) - [ ] [`iroh-gossip`](https://github.com/n0-computer/iroh-gossip) - [ ] [`iroh-blobs`](https://github.com/n0-computer/iroh-blobs) - [ ] [`dumbpipe`](https://github.com/n0-computer/dumbpipe) - [ ] [`sendme`](https://github.com/n0-computer/sendme)
In the endpoint state actor, this uses the `Connection::on_closed` future added in n0-computer/quinn#153 to remove connections once they are closed instead of relying on manual cleanup.
…async (#3629) ## Description Currently, `Magicsock::register_connection` is a sync function, but needs to send over an async channel to notify the endpoint state actor about the new connection. It currently employs a hack to achieve that: it spawns a tokio task for sending the message. This PR cleans this up by making `regsiter_connection` return a future, and awaits this future at the various sites where we go from quinn::Connection to iroh Connection. Luckily, all these call sites already are in async contexts. * When going from `Connecting` or `Accepting` to `Connection`, we await the registration after having the `quinn::Connecting` completes. The future is stored in an option instead of using a state enum as you would usually, because we need unconditional access to the `quinn::Connecting` in the functions on `Connecting`/`Accepting`. * For the `(Incoming|Outgoing)ZeroRttConnection`, we store a future that first awaits the handshake and then registers the connection. So we need only a single future here. With `register_connection` being async, we can also clean up some of the not-so-nice things introduced in #3622: Because we now have an async function, we can let the endpoint state actor return a reply. This makes it much more straightforward because we can have the endpoint state actor initialize a watcher for the paths and return it instead of having to do a weird dance with parts of the state being initialized or stored outside of the endpoint state actor to satisfy the sync function constraints. This is much nicer now IMO. ## Breaking Changes <!-- Optional, if there are any breaking changes document them, including how to migrate older code. --> ## Notes & open questions This adds a boxed future into the process of going from a `Connecting` to a `Connection`. If we really wanted, we could use a manually implemented future instead. However, I don't think one boxed future *per connection* is an issue, so I'd prefer to leave it like this (implementing a manual future for `tokio::mpsc::Sender::send` is cumbersome). ## Change checklist <!-- Remove any that are not relevant. --> - [ ] Self-review. - [ ] Documentation updates following the [style guide](https://rust-lang.github.io/rfcs/1574-more-api-documentation-conventions.html#appendix-a-full-conventions-text), if relevant. - [ ] Tests if relevant. - [ ] All breaking changes documented. - [ ] List all breaking changes in the above "Breaking Changes" section. - [ ] Open an issue or PR on any number0 repos that are affected by this breaking change. Give guidance on how the updates should be handled or do the actual updates themselves. The major ones are: - [ ] [`quic-rpc`](https://github.com/n0-computer/quic-rpc) - [ ] [`iroh-gossip`](https://github.com/n0-computer/iroh-gossip) - [ ] [`iroh-blobs`](https://github.com/n0-computer/iroh-blobs) - [ ] [`dumbpipe`](https://github.com/n0-computer/dumbpipe) - [ ] [`sendme`](https://github.com/n0-computer/sendme)
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Work on integrating n0-computer/quinn#28 into the iroh magic