//! # Example
//! ```
//! use std::net::TcpStream;
-//! use bitcoin::secp256k1::key::PublicKey;
+//! use bitcoin::secp256k1::PublicKey;
//! use lightning::util::events::{Event, EventHandler, EventsProvider};
//! use std::net::SocketAddr;
//! use std::sync::Arc;
//! async fn connect_to_node(peer_manager: PeerManager, chain_monitor: Arc<ChainMonitor>, channel_manager: ChannelManager, their_node_id: PublicKey, addr: SocketAddr) {
//! lightning_net_tokio::connect_outbound(peer_manager, their_node_id, addr).await;
//! loop {
-//! let event_handler = |event: &Event| {
+//! let event_handler = |event: Event| {
//! // Handle the event!
//! };
//! channel_manager.await_persistable_update();
//! async fn accept_socket(peer_manager: PeerManager, chain_monitor: Arc<ChainMonitor>, channel_manager: ChannelManager, socket: TcpStream) {
//! lightning_net_tokio::setup_inbound(peer_manager, socket);
//! loop {
-//! let event_handler = |event: &Event| {
+//! let event_handler = |event: Event| {
//! // Handle the event!
//! };
//! channel_manager.await_persistable_update();
//! }
//! ```
+// Prefix these with `rustdoc::` when we update our MSRV to be >= 1.52 to remove warnings.
#![deny(broken_intra_doc_links)]
-#![deny(missing_docs)]
+#![deny(private_intra_doc_links)]
+#![deny(missing_docs)]
#![cfg_attr(docsrs, feature(doc_auto_cfg))]
-use bitcoin::secp256k1::key::PublicKey;
+use bitcoin::secp256k1::PublicKey;
use tokio::net::TcpStream;
use tokio::{io, time};
use lightning::ln::peer_handler;
use lightning::ln::peer_handler::SocketDescriptor as LnSocketTrait;
use lightning::ln::peer_handler::CustomMessageHandler;
-use lightning::ln::msgs::{ChannelMessageHandler, RoutingMessageHandler};
+use lightning::ln::msgs::{ChannelMessageHandler, NetAddress, OnionMessageHandler, RoutingMessageHandler};
use lightning::util::logger::Logger;
+use std::ops::Deref;
use std::task;
use std::net::SocketAddr;
use std::net::TcpStream as StdTcpStream;
id: u64,
}
impl Connection {
- async fn schedule_read<CMH, RMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, Arc<CMH>, Arc<RMH>, Arc<L>, Arc<UMH>>>, us: Arc<Mutex<Self>>, mut reader: io::ReadHalf<TcpStream>, mut read_wake_receiver: mpsc::Receiver<()>, mut write_avail_receiver: mpsc::Receiver<()>) where
- CMH: ChannelMessageHandler + 'static,
- RMH: RoutingMessageHandler + 'static,
- L: Logger + 'static + ?Sized,
- UMH: CustomMessageHandler + 'static {
+ async fn poll_event_process<CMH, RMH, OMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, CMH, RMH, OMH, L, UMH>>, mut event_receiver: mpsc::Receiver<()>) where
+ CMH: Deref + 'static + Send + Sync,
+ RMH: Deref + 'static + Send + Sync,
+ OMH: Deref + 'static + Send + Sync,
+ L: Deref + 'static + Send + Sync,
+ UMH: Deref + 'static + Send + Sync,
+ CMH::Target: ChannelMessageHandler + Send + Sync,
+ RMH::Target: RoutingMessageHandler + Send + Sync,
+ OMH::Target: OnionMessageHandler + Send + Sync,
+ L::Target: Logger + Send + Sync,
+ UMH::Target: CustomMessageHandler + Send + Sync,
+ {
+ loop {
+ if event_receiver.recv().await.is_none() {
+ return;
+ }
+ peer_manager.process_events();
+ }
+ }
+
+ async fn schedule_read<CMH, RMH, OMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, CMH, RMH, OMH, L, UMH>>, us: Arc<Mutex<Self>>, mut reader: io::ReadHalf<TcpStream>, mut read_wake_receiver: mpsc::Receiver<()>, mut write_avail_receiver: mpsc::Receiver<()>) where
+ CMH: Deref + 'static + Send + Sync,
+ RMH: Deref + 'static + Send + Sync,
+ OMH: Deref + 'static + Send + Sync,
+ L: Deref + 'static + Send + Sync,
+ UMH: Deref + 'static + Send + Sync,
+ CMH::Target: ChannelMessageHandler + 'static + Send + Sync,
+ RMH::Target: RoutingMessageHandler + 'static + Send + Sync,
+ OMH::Target: OnionMessageHandler + 'static + Send + Sync,
+ L::Target: Logger + 'static + Send + Sync,
+ UMH::Target: CustomMessageHandler + 'static + Send + Sync,
+ {
+ // Create a waker to wake up poll_event_process, above
+ let (event_waker, event_receiver) = mpsc::channel(1);
+ tokio::spawn(Self::poll_event_process(Arc::clone(&peer_manager), event_receiver));
+
// 8KB is nice and big but also should never cause any issues with stack overflowing.
let mut buf = [0; 8192];
Err(_) => break Disconnect::PeerDisconnected,
},
}
- peer_manager.process_events();
+ let _ = event_waker.try_send(());
+
+ // At this point we've processed a message or two, and reset the ping timer for this
+ // peer, at least in the "are we still receiving messages" context, if we don't give up
+ // our timeslice to another task we may just spin on this peer, starving other peers
+ // and eventually disconnecting them for ping timeouts. Instead, we explicitly yield
+ // here.
+ tokio::task::yield_now().await;
};
let writer_option = us.lock().unwrap().writer.take();
if let Some(mut writer) = writer_option {
}
}
+fn get_addr_from_stream(stream: &StdTcpStream) -> Option<NetAddress> {
+ match stream.peer_addr() {
+ Ok(SocketAddr::V4(sockaddr)) => Some(NetAddress::IPv4 {
+ addr: sockaddr.ip().octets(),
+ port: sockaddr.port(),
+ }),
+ Ok(SocketAddr::V6(sockaddr)) => Some(NetAddress::IPv6 {
+ addr: sockaddr.ip().octets(),
+ port: sockaddr.port(),
+ }),
+ Err(_) => None,
+ }
+}
+
/// Process incoming messages and feed outgoing messages on the provided socket generated by
/// accepting an incoming connection.
///
/// The returned future will complete when the peer is disconnected and associated handling
/// futures are freed, though, because all processing futures are spawned with tokio::spawn, you do
/// not need to poll the provided future in order to make progress.
-pub fn setup_inbound<CMH, RMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, Arc<CMH>, Arc<RMH>, Arc<L>, Arc<UMH>>>, stream: StdTcpStream) -> impl std::future::Future<Output=()> where
- CMH: ChannelMessageHandler + 'static + Send + Sync,
- RMH: RoutingMessageHandler + 'static + Send + Sync,
- L: Logger + 'static + ?Sized + Send + Sync,
- UMH: CustomMessageHandler + 'static + Send + Sync {
+pub fn setup_inbound<CMH, RMH, OMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, CMH, RMH, OMH, L, UMH>>, stream: StdTcpStream) -> impl std::future::Future<Output=()> where
+ CMH: Deref + 'static + Send + Sync,
+ RMH: Deref + 'static + Send + Sync,
+ OMH: Deref + 'static + Send + Sync,
+ L: Deref + 'static + Send + Sync,
+ UMH: Deref + 'static + Send + Sync,
+ CMH::Target: ChannelMessageHandler + Send + Sync,
+ RMH::Target: RoutingMessageHandler + Send + Sync,
+ OMH::Target: OnionMessageHandler + Send + Sync,
+ L::Target: Logger + Send + Sync,
+ UMH::Target: CustomMessageHandler + Send + Sync,
+{
+ let remote_addr = get_addr_from_stream(&stream);
let (reader, write_receiver, read_receiver, us) = Connection::new(stream);
#[cfg(debug_assertions)]
let last_us = Arc::clone(&us);
- let handle_opt = if let Ok(_) = peer_manager.new_inbound_connection(SocketDescriptor::new(us.clone())) {
+ let handle_opt = if let Ok(_) = peer_manager.new_inbound_connection(SocketDescriptor::new(us.clone()), remote_addr) {
Some(tokio::spawn(Connection::schedule_read(peer_manager, us, reader, read_receiver, write_receiver)))
} else {
// Note that we will skip socket_disconnected here, in accordance with the PeerManager
/// The returned future will complete when the peer is disconnected and associated handling
/// futures are freed, though, because all processing futures are spawned with tokio::spawn, you do
/// not need to poll the provided future in order to make progress.
-pub fn setup_outbound<CMH, RMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, Arc<CMH>, Arc<RMH>, Arc<L>, Arc<UMH>>>, their_node_id: PublicKey, stream: StdTcpStream) -> impl std::future::Future<Output=()> where
- CMH: ChannelMessageHandler + 'static + Send + Sync,
- RMH: RoutingMessageHandler + 'static + Send + Sync,
- L: Logger + 'static + ?Sized + Send + Sync,
- UMH: CustomMessageHandler + 'static + Send + Sync {
+pub fn setup_outbound<CMH, RMH, OMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, CMH, RMH, OMH, L, UMH>>, their_node_id: PublicKey, stream: StdTcpStream) -> impl std::future::Future<Output=()> where
+ CMH: Deref + 'static + Send + Sync,
+ RMH: Deref + 'static + Send + Sync,
+ OMH: Deref + 'static + Send + Sync,
+ L: Deref + 'static + Send + Sync,
+ UMH: Deref + 'static + Send + Sync,
+ CMH::Target: ChannelMessageHandler + Send + Sync,
+ RMH::Target: RoutingMessageHandler + Send + Sync,
+ OMH::Target: OnionMessageHandler + Send + Sync,
+ L::Target: Logger + Send + Sync,
+ UMH::Target: CustomMessageHandler + Send + Sync,
+{
+ let remote_addr = get_addr_from_stream(&stream);
let (reader, mut write_receiver, read_receiver, us) = Connection::new(stream);
#[cfg(debug_assertions)]
let last_us = Arc::clone(&us);
-
- let handle_opt = if let Ok(initial_send) = peer_manager.new_outbound_connection(their_node_id, SocketDescriptor::new(us.clone())) {
+ let handle_opt = if let Ok(initial_send) = peer_manager.new_outbound_connection(their_node_id, SocketDescriptor::new(us.clone()), remote_addr) {
Some(tokio::spawn(async move {
// We should essentially always have enough room in a TCP socket buffer to send the
// initial 10s of bytes. However, tokio running in single-threaded mode will always
/// disconnected and associated handling futures are freed, though, because all processing in said
/// futures are spawned with tokio::spawn, you do not need to poll the second future in order to
/// make progress.
-pub async fn connect_outbound<CMH, RMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, Arc<CMH>, Arc<RMH>, Arc<L>, Arc<UMH>>>, their_node_id: PublicKey, addr: SocketAddr) -> Option<impl std::future::Future<Output=()>> where
- CMH: ChannelMessageHandler + 'static + Send + Sync,
- RMH: RoutingMessageHandler + 'static + Send + Sync,
- L: Logger + 'static + ?Sized + Send + Sync,
- UMH: CustomMessageHandler + 'static + Send + Sync {
+pub async fn connect_outbound<CMH, RMH, OMH, L, UMH>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, CMH, RMH, OMH, L, UMH>>, their_node_id: PublicKey, addr: SocketAddr) -> Option<impl std::future::Future<Output=()>> where
+ CMH: Deref + 'static + Send + Sync,
+ RMH: Deref + 'static + Send + Sync,
+ OMH: Deref + 'static + Send + Sync,
+ L: Deref + 'static + Send + Sync,
+ UMH: Deref + 'static + Send + Sync,
+ CMH::Target: ChannelMessageHandler + Send + Sync,
+ RMH::Target: RoutingMessageHandler + Send + Sync,
+ OMH::Target: OnionMessageHandler + Send + Sync,
+ L::Target: Logger + Send + Sync,
+ UMH::Target: CustomMessageHandler + Send + Sync,
+{
if let Ok(Ok(stream)) = time::timeout(Duration::from_secs(10), async { TcpStream::connect(&addr).await.map(|s| s.into_std().unwrap()) }).await {
Some(setup_outbound(peer_manager, their_node_id, stream))
} else { None }
// pause read given we're now waiting on the remote end to ACK (and in
// accordance with the send_data() docs).
us.read_paused = true;
+ // Further, to avoid any current pending read causing a `read_event` call, wake
+ // up the read_waker and restart its loop.
+ let _ = us.read_waker.try_send(());
return written_len;
},
}
use lightning::ln::features::*;
use lightning::ln::msgs::*;
use lightning::ln::peer_handler::{MessageHandler, PeerManager};
+ use lightning::ln::features::NodeFeatures;
use lightning::util::events::*;
use bitcoin::secp256k1::{Secp256k1, SecretKey, PublicKey};
fn handle_node_announcement(&self, _msg: &NodeAnnouncement) -> Result<bool, LightningError> { Ok(false) }
fn handle_channel_announcement(&self, _msg: &ChannelAnnouncement) -> Result<bool, LightningError> { Ok(false) }
fn handle_channel_update(&self, _msg: &ChannelUpdate) -> Result<bool, LightningError> { Ok(false) }
- fn get_next_channel_announcements(&self, _starting_point: u64, _batch_amount: u8) -> Vec<(ChannelAnnouncement, Option<ChannelUpdate>, Option<ChannelUpdate>)> { Vec::new() }
- fn get_next_node_announcements(&self, _starting_point: Option<&PublicKey>, _batch_amount: u8) -> Vec<NodeAnnouncement> { Vec::new() }
- fn peer_connected(&self, _their_node_id: &PublicKey, _init_msg: &Init) { }
+ fn get_next_channel_announcement(&self, _starting_point: u64) -> Option<(ChannelAnnouncement, Option<ChannelUpdate>, Option<ChannelUpdate>)> { None }
+ fn get_next_node_announcement(&self, _starting_point: Option<&PublicKey>) -> Option<NodeAnnouncement> { None }
+ fn peer_connected(&self, _their_node_id: &PublicKey, _init_msg: &Init) -> Result<(), ()> { Ok(()) }
fn handle_reply_channel_range(&self, _their_node_id: &PublicKey, _msg: ReplyChannelRange) -> Result<(), LightningError> { Ok(()) }
fn handle_reply_short_channel_ids_end(&self, _their_node_id: &PublicKey, _msg: ReplyShortChannelIdsEnd) -> Result<(), LightningError> { Ok(()) }
fn handle_query_channel_range(&self, _their_node_id: &PublicKey, _msg: QueryChannelRange) -> Result<(), LightningError> { Ok(()) }
fn handle_query_short_channel_ids(&self, _their_node_id: &PublicKey, _msg: QueryShortChannelIds) -> Result<(), LightningError> { Ok(()) }
+ fn provided_node_features(&self) -> NodeFeatures { NodeFeatures::empty() }
+ fn provided_init_features(&self, _their_node_id: &PublicKey) -> InitFeatures { InitFeatures::empty() }
}
impl ChannelMessageHandler for MsgHandler {
fn handle_open_channel(&self, _their_node_id: &PublicKey, _their_features: InitFeatures, _msg: &OpenChannel) {}
fn handle_accept_channel(&self, _their_node_id: &PublicKey, _their_features: InitFeatures, _msg: &AcceptChannel) {}
fn handle_funding_created(&self, _their_node_id: &PublicKey, _msg: &FundingCreated) {}
fn handle_funding_signed(&self, _their_node_id: &PublicKey, _msg: &FundingSigned) {}
- fn handle_funding_locked(&self, _their_node_id: &PublicKey, _msg: &FundingLocked) {}
+ fn handle_channel_ready(&self, _their_node_id: &PublicKey, _msg: &ChannelReady) {}
fn handle_shutdown(&self, _their_node_id: &PublicKey, _their_features: &InitFeatures, _msg: &Shutdown) {}
fn handle_closing_signed(&self, _their_node_id: &PublicKey, _msg: &ClosingSigned) {}
fn handle_update_add_htlc(&self, _their_node_id: &PublicKey, _msg: &UpdateAddHTLC) {}
self.pubkey_disconnected.clone().try_send(()).unwrap();
}
}
- fn peer_connected(&self, their_node_id: &PublicKey, _msg: &Init) {
+ fn peer_connected(&self, their_node_id: &PublicKey, _init_msg: &Init) -> Result<(), ()> {
if *their_node_id == self.expected_pubkey {
self.pubkey_connected.clone().try_send(()).unwrap();
}
+ Ok(())
}
fn handle_channel_reestablish(&self, _their_node_id: &PublicKey, _msg: &ChannelReestablish) {}
fn handle_error(&self, _their_node_id: &PublicKey, _msg: &ErrorMessage) {}
+ fn provided_node_features(&self) -> NodeFeatures { NodeFeatures::empty() }
+ fn provided_init_features(&self, _their_node_id: &PublicKey) -> InitFeatures { InitFeatures::empty() }
}
impl MessageSendEventsProvider for MsgHandler {
fn get_and_clear_pending_msg_events(&self) -> Vec<MessageSendEvent> {
}
}
+ fn make_tcp_connection() -> (std::net::TcpStream, std::net::TcpStream) {
+ if let Ok(listener) = std::net::TcpListener::bind("127.0.0.1:9735") {
+ (std::net::TcpStream::connect("127.0.0.1:9735").unwrap(), listener.accept().unwrap().0)
+ } else if let Ok(listener) = std::net::TcpListener::bind("127.0.0.1:19735") {
+ (std::net::TcpStream::connect("127.0.0.1:19735").unwrap(), listener.accept().unwrap().0)
+ } else if let Ok(listener) = std::net::TcpListener::bind("127.0.0.1:9997") {
+ (std::net::TcpStream::connect("127.0.0.1:9997").unwrap(), listener.accept().unwrap().0)
+ } else if let Ok(listener) = std::net::TcpListener::bind("127.0.0.1:9998") {
+ (std::net::TcpStream::connect("127.0.0.1:9998").unwrap(), listener.accept().unwrap().0)
+ } else if let Ok(listener) = std::net::TcpListener::bind("127.0.0.1:9999") {
+ (std::net::TcpStream::connect("127.0.0.1:9999").unwrap(), listener.accept().unwrap().0)
+ } else if let Ok(listener) = std::net::TcpListener::bind("127.0.0.1:46926") {
+ (std::net::TcpStream::connect("127.0.0.1:46926").unwrap(), listener.accept().unwrap().0)
+ } else { panic!("Failed to bind to v4 localhost on common ports"); }
+ }
+
async fn do_basic_connection_test() {
let secp_ctx = Secp256k1::new();
let a_key = SecretKey::from_slice(&[1; 32]).unwrap();
let a_manager = Arc::new(PeerManager::new(MessageHandler {
chan_handler: Arc::clone(&a_handler),
route_handler: Arc::clone(&a_handler),
- }, a_key.clone(), &[1; 32], Arc::new(TestLogger()), Arc::new(lightning::ln::peer_handler::IgnoringMessageHandler{})));
+ onion_message_handler: Arc::new(lightning::ln::peer_handler::IgnoringMessageHandler{}),
+ }, a_key.clone(), 0, &[1; 32], Arc::new(TestLogger()), Arc::new(lightning::ln::peer_handler::IgnoringMessageHandler{})));
let (b_connected_sender, mut b_connected) = mpsc::channel(1);
let (b_disconnected_sender, mut b_disconnected) = mpsc::channel(1);
let b_manager = Arc::new(PeerManager::new(MessageHandler {
chan_handler: Arc::clone(&b_handler),
route_handler: Arc::clone(&b_handler),
- }, b_key.clone(), &[2; 32], Arc::new(TestLogger()), Arc::new(lightning::ln::peer_handler::IgnoringMessageHandler{})));
+ onion_message_handler: Arc::new(lightning::ln::peer_handler::IgnoringMessageHandler{}),
+ }, b_key.clone(), 0, &[2; 32], Arc::new(TestLogger()), Arc::new(lightning::ln::peer_handler::IgnoringMessageHandler{})));
// We bind on localhost, hoping the environment is properly configured with a local
// address. This may not always be the case in containers and the like, so if this test is
// failing for you check that you have a loopback interface and it is configured with
// 127.0.0.1.
- let (conn_a, conn_b) = if let Ok(listener) = std::net::TcpListener::bind("127.0.0.1:9735") {
- (std::net::TcpStream::connect("127.0.0.1:9735").unwrap(), listener.accept().unwrap().0)
- } else if let Ok(listener) = std::net::TcpListener::bind("127.0.0.1:9999") {
- (std::net::TcpStream::connect("127.0.0.1:9999").unwrap(), listener.accept().unwrap().0)
- } else if let Ok(listener) = std::net::TcpListener::bind("127.0.0.1:46926") {
- (std::net::TcpStream::connect("127.0.0.1:46926").unwrap(), listener.accept().unwrap().0)
- } else { panic!("Failed to bind to v4 localhost on common ports"); };
+ let (conn_a, conn_b) = make_tcp_connection();
let fut_a = super::setup_outbound(Arc::clone(&a_manager), b_pub, conn_a);
let fut_b = super::setup_inbound(b_manager, conn_b);
async fn basic_threaded_connection_test() {
do_basic_connection_test().await;
}
+
#[tokio::test]
async fn basic_unthreaded_connection_test() {
do_basic_connection_test().await;
}
+
+ async fn race_disconnect_accept() {
+ // Previously, if we handed an already-disconnected socket to `setup_inbound` we'd panic.
+ // This attempts to find other similar races by opening connections and shutting them down
+ // while connecting. Sadly in testing this did *not* reproduce the previous issue.
+ let secp_ctx = Secp256k1::new();
+ let a_key = SecretKey::from_slice(&[1; 32]).unwrap();
+ let b_key = SecretKey::from_slice(&[2; 32]).unwrap();
+ let b_pub = PublicKey::from_secret_key(&secp_ctx, &b_key);
+
+ let a_manager = Arc::new(PeerManager::new(MessageHandler {
+ chan_handler: Arc::new(lightning::ln::peer_handler::ErroringMessageHandler::new()),
+ onion_message_handler: Arc::new(lightning::ln::peer_handler::IgnoringMessageHandler{}),
+ route_handler: Arc::new(lightning::ln::peer_handler::IgnoringMessageHandler{}),
+ }, a_key, 0, &[1; 32], Arc::new(TestLogger()), Arc::new(lightning::ln::peer_handler::IgnoringMessageHandler{})));
+
+ // Make two connections, one for an inbound and one for an outbound connection
+ let conn_a = {
+ let (conn_a, _) = make_tcp_connection();
+ conn_a
+ };
+ let conn_b = {
+ let (_, conn_b) = make_tcp_connection();
+ conn_b
+ };
+
+ // Call connection setup inside new tokio tasks.
+ let manager_reference = Arc::clone(&a_manager);
+ tokio::spawn(async move {
+ super::setup_inbound(manager_reference, conn_a).await
+ });
+ tokio::spawn(async move {
+ super::setup_outbound(a_manager, b_pub, conn_b).await
+ });
+ }
+
+ #[tokio::test(flavor = "multi_thread")]
+ async fn threaded_race_disconnect_accept() {
+ race_disconnect_accept().await;
+ }
+
+ #[tokio::test]
+ async fn unthreaded_race_disconnect_accept() {
+ race_disconnect_accept().await;
+ }
}