fix: fix silent failure to add data of more than ~16MB via add_bytes or add_bytes_named

.gitignore

@@ -1,2 +1,3 @@
 /target
 iroh.config.toml
+.vscode/*

Cargo.toml

@@ -54,7 +54,7 @@ postcard = { version = "1", default-features = false, features = [
     "use-std",
     "experimental-derive",
 ] }
-quic-rpc = { version = "0.17", optional = true }
+quic-rpc = { version = "0.17.1", optional = true }
 quic-rpc-derive = { version = "0.17", optional = true }
 quinn = { package = "iroh-quinn", version = "0.12", features = ["ring"] }
 rand = "0.8"
@@ -119,6 +119,7 @@ example-iroh = [
   "dep:console",
   "iroh/discovery-local-network"
 ]
+test = ["quic-rpc/quinn-transport"]
 
 [package.metadata.docs.rs]
 all-features = true

src/rpc/client/blobs.rs

@@ -268,10 +268,10 @@ where
             }
         });
         tokio::spawn(async move {
-            // TODO: Is it important to catch this error? It should also result in an error on the
-            // response stream. If we deem it important, we could one-shot send it into the
-            // BlobAddProgress and return from there. Not sure.
             if let Err(err) = sink.send_all(&mut input).await {
+                // if we get an error in send_all due to the connection being closed, this will just fail again.
+                // if we get an error due to something else (serialization or size limit), tell the remote to abort.
+                sink.send(AddStreamUpdate::Abort).await.ok();
                 warn!("Failed to send input stream to remote: {err:?}");
             }
         });
@@ -281,7 +281,7 @@ where
 
     /// Write a blob by passing bytes.
     pub async fn add_bytes(&self, bytes: impl Into<Bytes>) -> anyhow::Result<AddOutcome> {
-        let input = futures_lite::stream::once(Ok(bytes.into()));
+        let input = chunked_bytes_stream(bytes.into(), 1024 * 64).map(Ok);
         self.add_stream(input, SetTagOption::Auto).await?.await
     }
 
@@ -291,7 +291,7 @@ where
         bytes: impl Into<Bytes>,
         name: impl Into<Tag>,
     ) -> anyhow::Result<AddOutcome> {
-        let input = futures_lite::stream::once(Ok(bytes.into()));
+        let input = chunked_bytes_stream(bytes.into(), 1024 * 64).map(Ok);
         self.add_stream(input, SetTagOption::Named(name.into()))
             .await?
             .await
@@ -987,6 +987,12 @@ pub struct DownloadOptions {
     pub mode: DownloadMode,
 }
 
+fn chunked_bytes_stream(mut b: Bytes, c: usize) -> impl Stream<Item = Bytes> {
+    futures_lite::stream::iter(std::iter::from_fn(move || {
+        Some(b.split_to(b.len().min(c))).filter(|x| !x.is_empty())
+    }))
+}
+
 #[cfg(test)]
 mod tests {
     use std::{path::Path, time::Duration};

tests/rpc.rs

@@ -0,0 +1,153 @@
+#![cfg(feature = "test")]
+use std::{net::SocketAddr, path::PathBuf, sync::Arc};
+
+use iroh_blobs::{net_protocol::Blobs, util::local_pool::LocalPool};
+use quic_rpc::transport::quinn::QuinnConnector;
+use quinn::{
+    crypto::rustls::{QuicClientConfig, QuicServerConfig},
+    rustls, ClientConfig, Endpoint, ServerConfig,
+};
+use rcgen::CertifiedKey;
+use tempfile::TempDir;
+use testresult::TestResult;
+use tokio_util::task::AbortOnDropHandle;
+
+type QC = QuinnConnector<iroh_blobs::rpc::proto::Response, iroh_blobs::rpc::proto::Request>;
+type BlobsClient = iroh_blobs::rpc::client::blobs::Client<QC>;
+
+/// Builds default quinn client config and trusts given certificates.
+///
+/// ## Args
+///
+/// - server_certs: a list of trusted certificates in DER format.
+fn configure_client(server_certs: &[CertifiedKey]) -> anyhow::Result<ClientConfig> {
+    let mut certs = rustls::RootCertStore::empty();
+    for cert in server_certs {
+        let cert = cert.cert.der().clone();
+        certs.add(cert)?;
+    }
+
+    let crypto_client_config = rustls::ClientConfig::builder_with_provider(Arc::new(
+        rustls::crypto::ring::default_provider(),
+    ))
+    .with_protocol_versions(&[&rustls::version::TLS13])
+    .expect("valid versions")
+    .with_root_certificates(certs)
+    .with_no_client_auth();
+    let quic_client_config = QuicClientConfig::try_from(crypto_client_config)?;
+
+    Ok(ClientConfig::new(Arc::new(quic_client_config)))
+}
+
+/// Returns default server configuration along with its certificate.
+#[allow(clippy::field_reassign_with_default)] // https://github.com/rust-lang/rust-clippy/issues/6527
+fn configure_server() -> anyhow::Result<(ServerConfig, CertifiedKey)> {
+    let cert = rcgen::generate_simple_self_signed(vec!["localhost".into()])?;
+    let cert_der = cert.cert.der();
+    let priv_key = rustls::pki_types::PrivatePkcs8KeyDer::from(cert.key_pair.serialize_der());
+    let cert_chain = vec![cert_der.clone()];
+
+    let crypto_server_config = rustls::ServerConfig::builder_with_provider(Arc::new(
+        rustls::crypto::ring::default_provider(),
+    ))
+    .with_protocol_versions(&[&rustls::version::TLS13])
+    .expect("valid versions")
+    .with_no_client_auth()
+    .with_single_cert(cert_chain, priv_key.into())?;
+    let quic_server_config = QuicServerConfig::try_from(crypto_server_config)?;
+    let mut server_config = ServerConfig::with_crypto(Arc::new(quic_server_config));
+
+    Arc::get_mut(&mut server_config.transport)
+        .unwrap()
+        .max_concurrent_uni_streams(0_u8.into());
+
+    Ok((server_config, cert))
+}
+
+pub fn make_server_endpoint(bind_addr: SocketAddr) -> anyhow::Result<(Endpoint, CertifiedKey)> {
+    let (server_config, server_cert) = configure_server()?;
+    let endpoint = Endpoint::server(server_config, bind_addr)?;
+    Ok((endpoint, server_cert))
+}
+
+pub fn make_client_endpoint(
+    bind_addr: SocketAddr,
+    server_certs: &[CertifiedKey],
+) -> anyhow::Result<Endpoint> {
+    let client_cfg = configure_client(server_certs)?;
+    let mut endpoint = Endpoint::client(bind_addr)?;
+    endpoint.set_default_client_config(client_cfg);
+    Ok(endpoint)
+}
+
+/// An iroh node that just has the blobs transport
+#[derive(Debug)]
+pub struct Node {
+    pub router: iroh::protocol::Router,
+    pub blobs: Blobs<iroh_blobs::store::fs::Store>,
+    pub local_pool: LocalPool,
+    pub rpc_task: AbortOnDropHandle<()>,
+}
+
+impl Node {
+    pub async fn new(path: PathBuf) -> anyhow::Result<(Self, SocketAddr, CertifiedKey)> {
+        let store = iroh_blobs::store::fs::Store::load(path).await?;
+        let local_pool = LocalPool::default();
+        let endpoint = iroh::Endpoint::builder().bind().await?;
+        let blobs = Blobs::builder(store).build(local_pool.handle(), &endpoint);
+        let router = iroh::protocol::Router::builder(endpoint)
+            .accept(iroh_blobs::ALPN, blobs.clone())
+            .spawn()
+            .await?;
+        let (config, key) = configure_server()?;
+        let endpoint = quinn::Endpoint::server(config, "127.0.0.1:0".parse().unwrap())?;
+        let local_addr = endpoint.local_addr()?;
+        let rpc_server = quic_rpc::transport::quinn::QuinnListener::new(endpoint)?;
+        let rpc_server =
+            quic_rpc::RpcServer::<iroh_blobs::rpc::proto::RpcService, _>::new(rpc_server);
+        let blobs2 = blobs.clone();
+        let rpc_task = rpc_server
+            .spawn_accept_loop(move |msg, chan| blobs2.clone().handle_rpc_request(msg, chan));
+        let node = Self {
+            router,
+            blobs,
+            local_pool,
+            rpc_task,
+        };
+        Ok((node, local_addr, key))
+    }
+}
+
+async fn node_and_client() -> TestResult<(Node, BlobsClient, TempDir)> {
+    let testdir = tempfile::tempdir()?;
+    let (node, addr, key) = Node::new(testdir.path().join("blobs")).await?;
+    let client = make_client_endpoint("127.0.0.1:0".parse().unwrap(), &[key])?;
+    let client = QuinnConnector::new(client, addr, "localhost".to_string());
+    let client = quic_rpc::RpcClient::<iroh_blobs::rpc::proto::RpcService, _>::new(client);
+    let client = iroh_blobs::rpc::client::blobs::Client::new(client);
+    Ok((node, client, testdir))
+}
+
+#[tokio::test]
+async fn quinn_rpc_smoke() -> TestResult<()> {
+    let _ = tracing_subscriber::fmt::try_init();
+    let (_node, client, _testdir) = node_and_client().await?;
+    let data = b"hello";
+    let hash = client.add_bytes(data.to_vec()).await?.hash;
+    assert_eq!(hash, iroh_blobs::Hash::new(data));
+    let data2 = client.read_to_bytes(hash).await?;
+    assert_eq!(data, &data2[..]);
+    Ok(())
+}
+
+#[tokio::test]
+async fn quinn_rpc_large() -> TestResult<()> {
+    let _ = tracing_subscriber::fmt::try_init();
+    let (_node, client, _testdir) = node_and_client().await?;
+    let data = vec![0; 1024 * 1024 * 16];
+    let hash = client.add_bytes(data.clone()).await?.hash;
+    assert_eq!(hash, iroh_blobs::Hash::new(&data));
+    let data2 = client.read_to_bytes(hash).await?;
+    assert_eq!(data, &data2[..]);
+    Ok(())
+}