fix(iroh): use two stage accept from quic-rpc (#2416)

## Description

fix(iroh): use two stage accept from quic-rpc to make the accept process
cancel-safe

Needs n0-computer/quic-rpc#87

## 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

- [x] Self-review.
- [x] Documentation updates if relevant.
- [x] Tests if relevant.
- [x] All breaking changes documented.

---------

Co-authored-by: dignifiedquire <me@dignifiedquire.com>

iroh-cli/Cargo.toml

@@ -45,7 +45,7 @@ parking_lot = "0.12.1"
 pkarr = { version = "1.1.5", default-features = false }
 portable-atomic = "1"
 postcard = "1.0.8"
-quic-rpc = { version = "0.10.2", features = ["flume-transport", "quinn-transport"] }
+quic-rpc = { version = "0.11", features = ["flume-transport", "quinn-transport"] }
 rand = "0.8.5"
 ratatui = "0.26.2"
 reqwest = { version = "0.12.4", default-features = false, features = ["json", "rustls-tls"] }

iroh/Cargo.toml

@@ -37,7 +37,7 @@ iroh-docs = { version = "0.18.0", path = "../iroh-docs" }
 iroh-gossip = { version = "0.18.0", path = "../iroh-gossip" }
 parking_lot = "0.12.1"
 postcard = { version = "1", default-features = false, features = ["alloc", "use-std", "experimental-derive"] }
-quic-rpc = { version = "0.10.2", default-features = false, features = ["flume-transport", "quinn-transport"] }
+quic-rpc = { version = "0.11", default-features = false, features = ["flume-transport", "quinn-transport"] }
 quinn = { package = "iroh-quinn", version = "0.10" }
 rand = "0.8"
 serde = { version = "1", features = ["derive"] }

iroh/src/node.rs

@@ -273,8 +273,8 @@ impl<D: iroh_blobs::store::Store> NodeInner<D> {
                 // accept is just a pending future.
                 request = external_rpc.accept() => {
                     match request {
-                        Ok((msg, chan)) => {
-                            rpc::Handler::spawn_rpc_request(self.clone(), &mut join_set, msg, chan);
+                        Ok(accepting) => {
+                            rpc::Handler::spawn_rpc_request(self.clone(), &mut join_set, accepting);
                         }
                         Err(e) => {
                             info!("rpc request error: {:?}", e);
@@ -284,8 +284,8 @@ impl<D: iroh_blobs::store::Store> NodeInner<D> {
                 // handle internal rpc requests.
                 request = internal_rpc.accept() => {
                     match request {
-                        Ok((msg, chan)) => {
-                            rpc::Handler::spawn_rpc_request(self.clone(), &mut join_set, msg, chan);
+                        Ok(accepting) => {
+                            rpc::Handler::spawn_rpc_request(self.clone(), &mut join_set, accepting);
                         }
                         Err(e) => {
                             info!("internal rpc request error: {:?}", e);

iroh/src/node/builder.rs

@@ -494,7 +494,7 @@ where
         .await?;
 
         // Initialize the internal RPC connection.
-        let (internal_rpc, controller) = quic_rpc::transport::flume::connection(1);
+        let (internal_rpc, controller) = quic_rpc::transport::flume::connection(32);
         // box the controller. Boxing has a special case for the flume channel that avoids allocations,
         // so this has zero overhead.
         let controller = quic_rpc::transport::boxed::Connection::new(controller);

iroh/src/node/rpc.rs

@@ -109,11 +109,11 @@ impl<D: BaoStore> Handler<D> {
     pub(crate) fn spawn_rpc_request<E: ServiceEndpoint<RpcService>>(
         inner: Arc<NodeInner<D>>,
         join_set: &mut JoinSet<anyhow::Result<()>>,
-        msg: Request,
-        chan: RpcChannel<RpcService, E>,
+        accepting: quic_rpc::server::Accepting<RpcService, E>,
     ) {
         let handler = Self::new(inner);
         join_set.spawn(async move {
+            let (msg, chan) = accepting.read_first().await?;
             if let Err(err) = handler.handle_rpc_request(msg, chan).await {
                 warn!("rpc request handler error: {err:?}");
             }