663 lines
22 KiB
Rust
663 lines
22 KiB
Rust
#![allow(dead_code)]
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use {
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bincode::Options,
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crossbeam_channel::Sender,
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futures::future::TryJoin,
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itertools::Itertools,
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log::error,
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quinn::{
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ClientConfig, ConnectError, Connecting, Connection, ConnectionError, Endpoint,
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EndpointConfig, ReadToEndError, RecvStream, SendStream, ServerConfig, TokioRuntime,
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TransportConfig, VarInt, WriteError,
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},
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rcgen::RcgenError,
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rustls::{Certificate, PrivateKey},
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serde_bytes::ByteBuf,
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solana_quic_client::nonblocking::quic_client::SkipServerVerification,
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solana_sdk::{packet::PACKET_DATA_SIZE, pubkey::Pubkey, signature::Keypair},
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solana_streamer::{
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quic::SkipClientVerification, tls_certificates::new_self_signed_tls_certificate,
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},
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std::{
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collections::{hash_map::Entry, HashMap},
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io::{Cursor, Error as IoError},
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net::{IpAddr, SocketAddr, UdpSocket},
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ops::Deref,
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sync::Arc,
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time::Duration,
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},
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thiserror::Error,
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tokio::{
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sync::{
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mpsc::{Receiver as AsyncReceiver, Sender as AsyncSender},
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oneshot::Sender as OneShotSender,
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RwLock,
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},
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task::JoinHandle,
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},
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};
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const ALPN_REPAIR_PROTOCOL_ID: &[u8] = b"solana-repair";
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const CONNECT_SERVER_NAME: &str = "solana-repair";
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const CLIENT_CHANNEL_CAPACITY: usize = 1 << 14;
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const CONNECTION_CACHE_CAPACITY: usize = 4096;
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const MAX_CONCURRENT_BIDI_STREAMS: VarInt = VarInt::from_u32(512);
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const CONNECTION_CLOSE_ERROR_CODE_SHUTDOWN: VarInt = VarInt::from_u32(1);
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const CONNECTION_CLOSE_ERROR_CODE_DROPPED: VarInt = VarInt::from_u32(2);
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const CONNECTION_CLOSE_ERROR_CODE_INVALID_IDENTITY: VarInt = VarInt::from_u32(3);
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const CONNECTION_CLOSE_ERROR_CODE_REPLACED: VarInt = VarInt::from_u32(4);
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const CONNECTION_CLOSE_REASON_SHUTDOWN: &[u8] = b"SHUTDOWN";
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const CONNECTION_CLOSE_REASON_DROPPED: &[u8] = b"DROPPED";
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const CONNECTION_CLOSE_REASON_INVALID_IDENTITY: &[u8] = b"INVALID_IDENTITY";
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const CONNECTION_CLOSE_REASON_REPLACED: &[u8] = b"REPLACED";
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pub(crate) type AsyncTryJoinHandle = TryJoin<JoinHandle<()>, JoinHandle<()>>;
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type ConnectionCache = HashMap<(SocketAddr, Option<Pubkey>), Arc<RwLock<Option<Connection>>>>;
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// Outgoing local requests.
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pub struct LocalRequest {
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pub(crate) remote_address: SocketAddr,
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pub(crate) bytes: Vec<u8>,
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pub(crate) num_expected_responses: usize,
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pub(crate) response_sender: Sender<(SocketAddr, Vec<u8>)>,
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}
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// Incomming requests from remote nodes.
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// remote_pubkey and response_sender are None only when adapting UDP packets.
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pub struct RemoteRequest {
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pub(crate) remote_pubkey: Option<Pubkey>,
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pub(crate) remote_address: SocketAddr,
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pub(crate) bytes: Vec<u8>,
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pub(crate) response_sender: Option<OneShotSender<Vec<Vec<u8>>>>,
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}
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#[derive(Error, Debug)]
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#[allow(clippy::enum_variant_names)]
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pub(crate) enum Error {
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#[error(transparent)]
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BincodeError(#[from] bincode::Error),
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#[error(transparent)]
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CertificateError(#[from] RcgenError),
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#[error(transparent)]
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ConnectError(#[from] ConnectError),
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#[error(transparent)]
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ConnectionError(#[from] ConnectionError),
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#[error("Channel Send Error")]
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ChannelSendError,
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#[error("Invalid Identity: {0:?}")]
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InvalidIdentity(SocketAddr),
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#[error(transparent)]
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IoError(#[from] IoError),
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#[error("No Response Received")]
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NoResponseReceived,
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#[error(transparent)]
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ReadToEndError(#[from] ReadToEndError),
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#[error("read_to_end Timeout")]
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ReadToEndTimeout,
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#[error(transparent)]
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WriteError(#[from] WriteError),
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#[error(transparent)]
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TlsError(#[from] rustls::Error),
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}
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#[allow(clippy::type_complexity)]
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pub(crate) fn new_quic_endpoint(
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runtime: &tokio::runtime::Handle,
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keypair: &Keypair,
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socket: UdpSocket,
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address: IpAddr,
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remote_request_sender: Sender<RemoteRequest>,
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) -> Result<(Endpoint, AsyncSender<LocalRequest>, AsyncTryJoinHandle), Error> {
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let (cert, key) = new_self_signed_tls_certificate(keypair, address)?;
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let server_config = new_server_config(cert.clone(), key.clone())?;
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let client_config = new_client_config(cert, key)?;
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let mut endpoint = {
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// Endpoint::new requires entering the runtime context,
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// otherwise the code below will panic.
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let _guard = runtime.enter();
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Endpoint::new(
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EndpointConfig::default(),
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Some(server_config),
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socket,
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Arc::new(TokioRuntime),
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)?
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};
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endpoint.set_default_client_config(client_config);
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let cache = Arc::<RwLock<ConnectionCache>>::default();
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let (client_sender, client_receiver) = tokio::sync::mpsc::channel(CLIENT_CHANNEL_CAPACITY);
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let server_task = runtime.spawn(run_server(
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endpoint.clone(),
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remote_request_sender.clone(),
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cache.clone(),
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));
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let client_task = runtime.spawn(run_client(
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endpoint.clone(),
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client_receiver,
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remote_request_sender,
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cache,
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));
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let task = futures::future::try_join(server_task, client_task);
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Ok((endpoint, client_sender, task))
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}
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pub(crate) fn close_quic_endpoint(endpoint: &Endpoint) {
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endpoint.close(
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CONNECTION_CLOSE_ERROR_CODE_SHUTDOWN,
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CONNECTION_CLOSE_REASON_SHUTDOWN,
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);
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}
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fn new_server_config(cert: Certificate, key: PrivateKey) -> Result<ServerConfig, rustls::Error> {
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let mut config = rustls::ServerConfig::builder()
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.with_safe_defaults()
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.with_client_cert_verifier(Arc::new(SkipClientVerification {}))
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.with_single_cert(vec![cert], key)?;
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config.alpn_protocols = vec![ALPN_REPAIR_PROTOCOL_ID.to_vec()];
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let mut config = ServerConfig::with_crypto(Arc::new(config));
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config
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.transport_config(Arc::new(new_transport_config()))
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.use_retry(true)
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.migration(false);
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Ok(config)
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}
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fn new_client_config(cert: Certificate, key: PrivateKey) -> Result<ClientConfig, rustls::Error> {
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let mut config = rustls::ClientConfig::builder()
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.with_safe_defaults()
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.with_custom_certificate_verifier(Arc::new(SkipServerVerification {}))
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.with_client_auth_cert(vec![cert], key)?;
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config.enable_early_data = true;
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config.alpn_protocols = vec![ALPN_REPAIR_PROTOCOL_ID.to_vec()];
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let mut config = ClientConfig::new(Arc::new(config));
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config.transport_config(Arc::new(new_transport_config()));
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Ok(config)
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}
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fn new_transport_config() -> TransportConfig {
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let mut config = TransportConfig::default();
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config
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.max_concurrent_bidi_streams(MAX_CONCURRENT_BIDI_STREAMS)
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.max_concurrent_uni_streams(VarInt::from(0u8))
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.datagram_receive_buffer_size(None);
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config
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}
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async fn run_server(
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endpoint: Endpoint,
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remote_request_sender: Sender<RemoteRequest>,
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cache: Arc<RwLock<ConnectionCache>>,
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) {
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while let Some(connecting) = endpoint.accept().await {
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tokio::task::spawn(handle_connecting_error(
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endpoint.clone(),
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connecting,
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remote_request_sender.clone(),
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cache.clone(),
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));
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}
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}
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async fn run_client(
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endpoint: Endpoint,
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mut receiver: AsyncReceiver<LocalRequest>,
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remote_request_sender: Sender<RemoteRequest>,
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cache: Arc<RwLock<ConnectionCache>>,
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) {
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while let Some(request) = receiver.recv().await {
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tokio::task::spawn(send_request_task(
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endpoint.clone(),
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request,
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remote_request_sender.clone(),
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cache.clone(),
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));
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}
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close_quic_endpoint(&endpoint);
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}
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async fn handle_connecting_error(
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endpoint: Endpoint,
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connecting: Connecting,
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remote_request_sender: Sender<RemoteRequest>,
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cache: Arc<RwLock<ConnectionCache>>,
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) {
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if let Err(err) = handle_connecting(endpoint, connecting, remote_request_sender, cache).await {
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error!("handle_connecting: {err:?}");
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}
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}
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async fn handle_connecting(
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endpoint: Endpoint,
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connecting: Connecting,
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remote_request_sender: Sender<RemoteRequest>,
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cache: Arc<RwLock<ConnectionCache>>,
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) -> Result<(), Error> {
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let connection = connecting.await?;
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let remote_address = connection.remote_address();
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let remote_pubkey = get_remote_pubkey(&connection)?;
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handle_connection_error(
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endpoint,
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remote_address,
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remote_pubkey,
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connection,
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remote_request_sender,
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cache,
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)
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.await;
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Ok(())
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}
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async fn handle_connection_error(
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endpoint: Endpoint,
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remote_address: SocketAddr,
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remote_pubkey: Pubkey,
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connection: Connection,
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remote_request_sender: Sender<RemoteRequest>,
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cache: Arc<RwLock<ConnectionCache>>,
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) {
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cache_connection(remote_address, remote_pubkey, connection.clone(), &cache).await;
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if let Err(err) = handle_connection(
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&endpoint,
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remote_address,
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remote_pubkey,
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&connection,
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&remote_request_sender,
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)
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.await
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{
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drop_connection(remote_address, remote_pubkey, &connection, &cache).await;
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error!("handle_connection: {remote_pubkey}, {remote_address}, {err:?}");
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}
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}
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async fn handle_connection(
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endpoint: &Endpoint,
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remote_address: SocketAddr,
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remote_pubkey: Pubkey,
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connection: &Connection,
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remote_request_sender: &Sender<RemoteRequest>,
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) -> Result<(), Error> {
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loop {
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let (send_stream, recv_stream) = connection.accept_bi().await?;
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tokio::task::spawn(handle_streams_task(
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endpoint.clone(),
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remote_address,
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remote_pubkey,
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send_stream,
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recv_stream,
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remote_request_sender.clone(),
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));
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}
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}
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async fn handle_streams_task(
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endpoint: Endpoint,
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remote_address: SocketAddr,
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remote_pubkey: Pubkey,
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send_stream: SendStream,
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recv_stream: RecvStream,
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remote_request_sender: Sender<RemoteRequest>,
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) {
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if let Err(err) = handle_streams(
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&endpoint,
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remote_address,
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remote_pubkey,
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send_stream,
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recv_stream,
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&remote_request_sender,
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)
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.await
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{
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error!("handle_stream: {remote_address}, {remote_pubkey}, {err:?}");
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}
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}
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async fn handle_streams(
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endpoint: &Endpoint,
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remote_address: SocketAddr,
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remote_pubkey: Pubkey,
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mut send_stream: SendStream,
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mut recv_stream: RecvStream,
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remote_request_sender: &Sender<RemoteRequest>,
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) -> Result<(), Error> {
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// Assert that send won't block.
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debug_assert_eq!(remote_request_sender.capacity(), None);
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const READ_TIMEOUT_DURATION: Duration = Duration::from_secs(2);
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let bytes = tokio::time::timeout(
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READ_TIMEOUT_DURATION,
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recv_stream.read_to_end(PACKET_DATA_SIZE),
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)
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.await
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.map_err(|_| Error::ReadToEndTimeout)??;
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let (response_sender, response_receiver) = tokio::sync::oneshot::channel();
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let remote_request = RemoteRequest {
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remote_pubkey: Some(remote_pubkey),
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remote_address,
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bytes,
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response_sender: Some(response_sender),
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};
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if let Err(err) = remote_request_sender.send(remote_request) {
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close_quic_endpoint(endpoint);
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return Err(Error::from(err));
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}
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let Ok(response) = response_receiver.await else {
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return Err(Error::NoResponseReceived);
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};
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for chunk in response {
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let size = chunk.len() as u64;
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send_stream.write_all(&size.to_le_bytes()).await?;
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send_stream.write_all(&chunk).await?;
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}
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send_stream.finish().await.map_err(Error::from)
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}
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async fn send_request_task(
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endpoint: Endpoint,
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request: LocalRequest,
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remote_request_sender: Sender<RemoteRequest>,
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cache: Arc<RwLock<ConnectionCache>>,
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) {
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if let Err(err) = send_request(&endpoint, request, remote_request_sender, cache).await {
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error!("send_request_task: {err:?}");
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}
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}
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async fn send_request(
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endpoint: &Endpoint,
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LocalRequest {
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remote_address,
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bytes,
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num_expected_responses,
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response_sender,
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}: LocalRequest,
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remote_request_sender: Sender<RemoteRequest>,
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cache: Arc<RwLock<ConnectionCache>>,
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) -> Result<(), Error> {
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// Assert that send won't block.
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debug_assert_eq!(response_sender.capacity(), None);
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const READ_TIMEOUT_DURATION: Duration = Duration::from_secs(10);
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let connection = get_connection(endpoint, remote_address, remote_request_sender, cache).await?;
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let (mut send_stream, mut recv_stream) = connection.open_bi().await?;
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send_stream.write_all(&bytes).await?;
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send_stream.finish().await?;
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// Each response is at most PACKET_DATA_SIZE bytes and requires
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// an additional 8 bytes to encode its length.
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let size = PACKET_DATA_SIZE
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.saturating_add(8)
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.saturating_mul(num_expected_responses);
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let response = tokio::time::timeout(READ_TIMEOUT_DURATION, recv_stream.read_to_end(size))
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.await
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.map_err(|_| Error::ReadToEndTimeout)??;
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let remote_address = connection.remote_address();
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let mut cursor = Cursor::new(&response[..]);
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std::iter::repeat_with(|| {
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bincode::options()
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.with_limit(response.len() as u64)
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.with_fixint_encoding()
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.allow_trailing_bytes()
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.deserialize_from::<_, ByteBuf>(&mut cursor)
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.map(ByteBuf::into_vec)
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.ok()
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})
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.while_some()
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.try_for_each(|chunk| {
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response_sender
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.send((remote_address, chunk))
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.map_err(|err| {
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close_quic_endpoint(endpoint);
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Error::from(err)
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})
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})
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}
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async fn get_connection(
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endpoint: &Endpoint,
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remote_address: SocketAddr,
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remote_request_sender: Sender<RemoteRequest>,
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cache: Arc<RwLock<ConnectionCache>>,
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) -> Result<Connection, Error> {
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let entry = get_cache_entry(remote_address, &cache).await;
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{
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let connection: Option<Connection> = entry.read().await.clone();
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if let Some(connection) = connection {
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if connection.close_reason().is_none() {
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return Ok(connection);
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}
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}
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}
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let connection = {
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// Need to write lock here so that only one task initiates
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// a new connection to the same remote_address.
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let mut entry = entry.write().await;
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if let Some(connection) = entry.deref() {
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if connection.close_reason().is_none() {
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return Ok(connection.clone());
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}
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}
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let connection = endpoint
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.connect(remote_address, CONNECT_SERVER_NAME)?
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.await?;
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entry.insert(connection).clone()
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};
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tokio::task::spawn(handle_connection_error(
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endpoint.clone(),
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connection.remote_address(),
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get_remote_pubkey(&connection)?,
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connection.clone(),
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remote_request_sender,
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cache,
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));
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Ok(connection)
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}
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fn get_remote_pubkey(connection: &Connection) -> Result<Pubkey, Error> {
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match solana_streamer::nonblocking::quic::get_remote_pubkey(connection) {
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Some(remote_pubkey) => Ok(remote_pubkey),
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None => {
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connection.close(
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CONNECTION_CLOSE_ERROR_CODE_INVALID_IDENTITY,
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CONNECTION_CLOSE_REASON_INVALID_IDENTITY,
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);
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Err(Error::InvalidIdentity(connection.remote_address()))
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}
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}
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}
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async fn get_cache_entry(
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remote_address: SocketAddr,
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cache: &RwLock<ConnectionCache>,
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) -> Arc<RwLock<Option<Connection>>> {
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let key = (remote_address, /*remote_pubkey:*/ None);
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if let Some(entry) = cache.read().await.get(&key) {
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return entry.clone();
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}
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cache.write().await.entry(key).or_default().clone()
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}
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async fn cache_connection(
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remote_address: SocketAddr,
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remote_pubkey: Pubkey,
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connection: Connection,
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cache: &RwLock<ConnectionCache>,
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) {
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// The 2nd cache entry with remote_pubkey == None allows to lookup an entry
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// only by SocketAddr when establishing outgoing connections.
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let entries: [Arc<RwLock<Option<Connection>>>; 2] = {
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let mut cache = cache.write().await;
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if cache.len() >= CONNECTION_CACHE_CAPACITY {
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connection.close(
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CONNECTION_CLOSE_ERROR_CODE_DROPPED,
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CONNECTION_CLOSE_REASON_DROPPED,
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);
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return;
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}
|
|
[Some(remote_pubkey), None].map(|remote_pubkey| {
|
|
let key = (remote_address, remote_pubkey);
|
|
cache.entry(key).or_default().clone()
|
|
})
|
|
};
|
|
let mut entry = entries[0].write().await;
|
|
*entries[1].write().await = Some(connection.clone());
|
|
if let Some(old) = entry.replace(connection) {
|
|
drop(entry);
|
|
old.close(
|
|
CONNECTION_CLOSE_ERROR_CODE_REPLACED,
|
|
CONNECTION_CLOSE_REASON_REPLACED,
|
|
);
|
|
}
|
|
}
|
|
|
|
async fn drop_connection(
|
|
remote_address: SocketAddr,
|
|
remote_pubkey: Pubkey,
|
|
connection: &Connection,
|
|
cache: &RwLock<ConnectionCache>,
|
|
) {
|
|
if connection.close_reason().is_none() {
|
|
connection.close(
|
|
CONNECTION_CLOSE_ERROR_CODE_DROPPED,
|
|
CONNECTION_CLOSE_REASON_DROPPED,
|
|
);
|
|
}
|
|
let key = (remote_address, Some(remote_pubkey));
|
|
if let Entry::Occupied(entry) = cache.write().await.entry(key) {
|
|
if matches!(entry.get().read().await.deref(),
|
|
Some(entry) if entry.stable_id() == connection.stable_id())
|
|
{
|
|
entry.remove();
|
|
}
|
|
}
|
|
// Cache entry for (remote_address, None) will be lazily evicted.
|
|
}
|
|
|
|
impl<T> From<crossbeam_channel::SendError<T>> for Error {
|
|
fn from(_: crossbeam_channel::SendError<T>) -> Self {
|
|
Error::ChannelSendError
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use {
|
|
super::*,
|
|
itertools::{izip, multiunzip},
|
|
solana_sdk::signature::Signer,
|
|
std::{iter::repeat_with, net::Ipv4Addr, time::Duration},
|
|
};
|
|
|
|
#[test]
|
|
fn test_quic_endpoint() {
|
|
const NUM_ENDPOINTS: usize = 3;
|
|
const RECV_TIMEOUT: Duration = Duration::from_secs(30);
|
|
let runtime = tokio::runtime::Builder::new_multi_thread()
|
|
.worker_threads(8)
|
|
.enable_all()
|
|
.build()
|
|
.unwrap();
|
|
let keypairs: Vec<Keypair> = repeat_with(Keypair::new).take(NUM_ENDPOINTS).collect();
|
|
let sockets: Vec<UdpSocket> = repeat_with(|| UdpSocket::bind((Ipv4Addr::LOCALHOST, 0)))
|
|
.take(NUM_ENDPOINTS)
|
|
.collect::<Result<_, _>>()
|
|
.unwrap();
|
|
let addresses: Vec<SocketAddr> = sockets
|
|
.iter()
|
|
.map(UdpSocket::local_addr)
|
|
.collect::<Result<_, _>>()
|
|
.unwrap();
|
|
let (remote_request_senders, remote_request_receivers): (Vec<_>, Vec<_>) =
|
|
repeat_with(crossbeam_channel::unbounded::<RemoteRequest>)
|
|
.take(NUM_ENDPOINTS)
|
|
.unzip();
|
|
let (endpoints, senders, tasks): (Vec<_>, Vec<_>, Vec<_>) = multiunzip(
|
|
keypairs
|
|
.iter()
|
|
.zip(sockets)
|
|
.zip(remote_request_senders)
|
|
.map(|((keypair, socket), remote_request_sender)| {
|
|
new_quic_endpoint(
|
|
runtime.handle(),
|
|
keypair,
|
|
socket,
|
|
IpAddr::V4(Ipv4Addr::LOCALHOST),
|
|
remote_request_sender,
|
|
)
|
|
.unwrap()
|
|
}),
|
|
);
|
|
let (response_senders, response_receivers): (Vec<_>, Vec<_>) =
|
|
repeat_with(crossbeam_channel::unbounded::<(SocketAddr, Vec<u8>)>)
|
|
.take(NUM_ENDPOINTS)
|
|
.unzip();
|
|
// Send a unique request from each endpoint to every other endpoint.
|
|
for (i, (keypair, &address, sender)) in izip!(&keypairs, &addresses, &senders).enumerate() {
|
|
for (j, (&remote_address, response_sender)) in
|
|
addresses.iter().zip(&response_senders).enumerate()
|
|
{
|
|
if i != j {
|
|
let mut bytes: Vec<u8> = format!("{i}=>{j}").into_bytes();
|
|
bytes.resize(PACKET_DATA_SIZE, 0xa5);
|
|
let request = LocalRequest {
|
|
remote_address,
|
|
bytes,
|
|
num_expected_responses: j + 1,
|
|
response_sender: response_sender.clone(),
|
|
};
|
|
sender.blocking_send(request).unwrap();
|
|
}
|
|
}
|
|
// Verify all requests are received and respond to each.
|
|
for (j, remote_request_receiver) in remote_request_receivers.iter().enumerate() {
|
|
if i != j {
|
|
let RemoteRequest {
|
|
remote_pubkey,
|
|
remote_address,
|
|
bytes,
|
|
response_sender,
|
|
} = remote_request_receiver.recv_timeout(RECV_TIMEOUT).unwrap();
|
|
assert_eq!(remote_pubkey, Some(keypair.pubkey()));
|
|
assert_eq!(remote_address, address);
|
|
assert_eq!(bytes, {
|
|
let mut bytes = format!("{i}=>{j}").into_bytes();
|
|
bytes.resize(PACKET_DATA_SIZE, 0xa5);
|
|
bytes
|
|
});
|
|
let response: Vec<Vec<u8>> = (0..=j)
|
|
.map(|k| {
|
|
let mut bytes = format!("{j}=>{i}({k})").into_bytes();
|
|
bytes.resize(PACKET_DATA_SIZE, 0xd5);
|
|
bytes
|
|
})
|
|
.collect();
|
|
response_sender.unwrap().send(response).unwrap();
|
|
}
|
|
}
|
|
// Verify responses.
|
|
for (j, (&remote_address, response_receiver)) in
|
|
addresses.iter().zip(&response_receivers).enumerate()
|
|
{
|
|
if i != j {
|
|
for k in 0..=j {
|
|
let (address, response) =
|
|
response_receiver.recv_timeout(RECV_TIMEOUT).unwrap();
|
|
assert_eq!(address, remote_address);
|
|
assert_eq!(response, {
|
|
let mut bytes = format!("{j}=>{i}({k})").into_bytes();
|
|
bytes.resize(PACKET_DATA_SIZE, 0xd5);
|
|
bytes
|
|
});
|
|
}
|
|
}
|
|
}
|
|
}
|
|
drop(senders);
|
|
for endpoint in endpoints {
|
|
close_quic_endpoint(&endpoint);
|
|
}
|
|
for task in tasks {
|
|
runtime.block_on(task).unwrap();
|
|
}
|
|
}
|
|
}
|