1 // This file is Copyright its original authors, visible in version control
4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
7 // You may not use this file except in accordance with one or both of these
10 //! A socket handling library for those running in Tokio environments who wish to use
11 //! rust-lightning with native TcpStreams.
13 //! Designed to be as simple as possible, the high-level usage is almost as simple as "hand over a
14 //! TcpStream and a reference to a PeerManager and the rest is handled", except for the
15 //! [Event](../lightning/util/events/enum.Event.html) handling mechanism; see example below.
17 //! The PeerHandler, due to the fire-and-forget nature of this logic, must be an Arc, and must use
18 //! the SocketDescriptor provided here as the PeerHandler's SocketDescriptor.
20 //! Three methods are exposed to register a new connection for handling in tokio::spawn calls; see
21 //! their individual docs for details.
25 //! use std::net::TcpStream;
26 //! use bitcoin::secp256k1::key::PublicKey;
27 //! use lightning::util::events::{Event, EventHandler, EventsProvider};
28 //! use std::net::SocketAddr;
29 //! use std::sync::Arc;
31 //! // Define concrete types for our high-level objects:
32 //! type TxBroadcaster = dyn lightning::chain::chaininterface::BroadcasterInterface + Send + Sync;
33 //! type FeeEstimator = dyn lightning::chain::chaininterface::FeeEstimator + Send + Sync;
34 //! type Logger = dyn lightning::util::logger::Logger + Send + Sync;
35 //! type ChainAccess = dyn lightning::chain::Access + Send + Sync;
36 //! type ChainFilter = dyn lightning::chain::Filter + Send + Sync;
37 //! type DataPersister = dyn lightning::chain::chainmonitor::Persist<lightning::chain::keysinterface::InMemorySigner> + Send + Sync;
38 //! type ChainMonitor = lightning::chain::chainmonitor::ChainMonitor<lightning::chain::keysinterface::InMemorySigner, Arc<ChainFilter>, Arc<TxBroadcaster>, Arc<FeeEstimator>, Arc<Logger>, Arc<DataPersister>>;
39 //! type ChannelManager = Arc<lightning::ln::channelmanager::SimpleArcChannelManager<ChainMonitor, TxBroadcaster, FeeEstimator, Logger>>;
40 //! type PeerManager = Arc<lightning::ln::peer_handler::SimpleArcPeerManager<lightning_net_tokio::SocketDescriptor, ChainMonitor, TxBroadcaster, FeeEstimator, ChainAccess, Logger>>;
42 //! // Connect to node with pubkey their_node_id at addr:
43 //! async fn connect_to_node(peer_manager: PeerManager, chain_monitor: Arc<ChainMonitor>, channel_manager: ChannelManager, their_node_id: PublicKey, addr: SocketAddr) {
44 //! lightning_net_tokio::connect_outbound(peer_manager, their_node_id, addr).await;
46 //! let event_handler = |event: &Event| {
47 //! // Handle the event!
49 //! channel_manager.await_persistable_update();
50 //! channel_manager.process_pending_events(&event_handler);
51 //! chain_monitor.process_pending_events(&event_handler);
55 //! // Begin reading from a newly accepted socket and talk to the peer:
56 //! async fn accept_socket(peer_manager: PeerManager, chain_monitor: Arc<ChainMonitor>, channel_manager: ChannelManager, socket: TcpStream) {
57 //! lightning_net_tokio::setup_inbound(peer_manager, socket);
59 //! let event_handler = |event: &Event| {
60 //! // Handle the event!
62 //! channel_manager.await_persistable_update();
63 //! channel_manager.process_pending_events(&event_handler);
64 //! chain_monitor.process_pending_events(&event_handler);
69 #![deny(broken_intra_doc_links)]
70 #![deny(missing_docs)]
72 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
74 use bitcoin::secp256k1::key::PublicKey;
76 use tokio::net::TcpStream;
77 use tokio::{io, time};
78 use tokio::sync::mpsc;
79 use tokio::io::{AsyncReadExt, AsyncWrite, AsyncWriteExt};
81 use lightning::ln::peer_handler;
82 use lightning::ln::peer_handler::SocketDescriptor as LnSocketTrait;
83 use lightning::ln::peer_handler::CustomMessageHandler;
84 use lightning::ln::msgs::{ChannelMessageHandler, RoutingMessageHandler};
85 use lightning::util::logger::Logger;
88 use std::net::SocketAddr;
89 use std::net::TcpStream as StdTcpStream;
90 use std::sync::{Arc, Mutex};
91 use std::sync::atomic::{AtomicU64, Ordering};
92 use std::time::Duration;
95 static ID_COUNTER: AtomicU64 = AtomicU64::new(0);
97 /// Connection contains all our internal state for a connection - we hold a reference to the
98 /// Connection object (in an Arc<Mutex<>>) in each SocketDescriptor we create as well as in the
99 /// read future (which is returned by schedule_read).
101 writer: Option<io::WriteHalf<TcpStream>>,
102 // Because our PeerManager is templated by user-provided types, and we can't (as far as I can
103 // tell) have a const RawWakerVTable built out of templated functions, we need some indirection
104 // between being woken up with write-ready and calling PeerManager::write_buffer_space_avail.
105 // This provides that indirection, with a Sender which gets handed to the PeerManager Arc on
106 // the schedule_read stack.
108 // An alternative (likely more effecient) approach would involve creating a RawWakerVTable at
109 // runtime with functions templated by the Arc<PeerManager> type, calling
110 // write_buffer_space_avail directly from tokio's write wake, however doing so would require
111 // more unsafe voodo than I really feel like writing.
112 write_avail: mpsc::Sender<()>,
113 // When we are told by rust-lightning to pause read (because we have writes backing up), we do
114 // so by setting read_paused. At that point, the read task will stop reading bytes from the
115 // socket. To wake it up (without otherwise changing its state, we can push a value into this
117 read_waker: mpsc::Sender<()>,
119 rl_requested_disconnect: bool,
123 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
124 CMH: ChannelMessageHandler + 'static,
125 RMH: RoutingMessageHandler + 'static,
126 L: Logger + 'static + ?Sized,
127 UMH: CustomMessageHandler + 'static {
128 // 8KB is nice and big but also should never cause any issues with stack overflowing.
129 let mut buf = [0; 8192];
131 let mut our_descriptor = SocketDescriptor::new(us.clone());
132 // An enum describing why we did/are disconnecting:
134 // Rust-Lightning told us to disconnect, either by returning an Err or by calling
135 // SocketDescriptor::disconnect_socket.
136 // In this case, we do not call peer_manager.socket_disconnected() as Rust-Lightning
137 // already knows we're disconnected.
139 // The connection was disconnected for some other reason, ie because the socket was
141 // In this case, we do need to call peer_manager.socket_disconnected() to inform
142 // Rust-Lightning that the socket is gone.
145 let disconnect_type = loop {
147 let us_lock = us.lock().unwrap();
148 if us_lock.rl_requested_disconnect {
149 break Disconnect::CloseConnection;
154 v = write_avail_receiver.recv() => {
155 assert!(v.is_some()); // We can't have dropped the sending end, its in the us Arc!
156 if let Err(_) = peer_manager.write_buffer_space_avail(&mut our_descriptor) {
157 break Disconnect::CloseConnection;
160 _ = read_wake_receiver.recv() => {},
161 read = reader.read(&mut buf), if !read_paused => match read {
162 Ok(0) => break Disconnect::PeerDisconnected,
164 let read_res = peer_manager.read_event(&mut our_descriptor, &buf[0..len]);
165 let mut us_lock = us.lock().unwrap();
169 us_lock.read_paused = true;
172 Err(_) => break Disconnect::CloseConnection,
175 Err(_) => break Disconnect::PeerDisconnected,
178 peer_manager.process_events();
180 let writer_option = us.lock().unwrap().writer.take();
181 if let Some(mut writer) = writer_option {
182 // If the socket is already closed, shutdown() will fail, so just ignore it.
183 let _ = writer.shutdown().await;
185 if let Disconnect::PeerDisconnected = disconnect_type {
186 peer_manager.socket_disconnected(&our_descriptor);
187 peer_manager.process_events();
191 fn new(stream: StdTcpStream) -> (io::ReadHalf<TcpStream>, mpsc::Receiver<()>, mpsc::Receiver<()>, Arc<Mutex<Self>>) {
192 // We only ever need a channel of depth 1 here: if we returned a non-full write to the
193 // PeerManager, we will eventually get notified that there is room in the socket to write
194 // new bytes, which will generate an event. That event will be popped off the queue before
195 // we call write_buffer_space_avail, ensuring that we have room to push a new () if, during
196 // the write_buffer_space_avail() call, send_data() returns a non-full write.
197 let (write_avail, write_receiver) = mpsc::channel(1);
198 // Similarly here - our only goal is to make sure the reader wakes up at some point after
199 // we shove a value into the channel which comes after we've reset the read_paused bool to
201 let (read_waker, read_receiver) = mpsc::channel(1);
202 stream.set_nonblocking(true).unwrap();
203 let (reader, writer) = io::split(TcpStream::from_std(stream).unwrap());
205 (reader, write_receiver, read_receiver,
206 Arc::new(Mutex::new(Self {
207 writer: Some(writer), write_avail, read_waker, read_paused: false,
208 rl_requested_disconnect: false,
209 id: ID_COUNTER.fetch_add(1, Ordering::AcqRel)
214 /// Process incoming messages and feed outgoing messages on the provided socket generated by
215 /// accepting an incoming connection.
217 /// The returned future will complete when the peer is disconnected and associated handling
218 /// futures are freed, though, because all processing futures are spawned with tokio::spawn, you do
219 /// not need to poll the provided future in order to make progress.
220 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
221 CMH: ChannelMessageHandler + 'static + Send + Sync,
222 RMH: RoutingMessageHandler + 'static + Send + Sync,
223 L: Logger + 'static + ?Sized + Send + Sync,
224 UMH: CustomMessageHandler + 'static + Send + Sync {
225 let (reader, write_receiver, read_receiver, us) = Connection::new(stream);
226 #[cfg(debug_assertions)]
227 let last_us = Arc::clone(&us);
229 let handle_opt = if let Ok(_) = peer_manager.new_inbound_connection(SocketDescriptor::new(us.clone())) {
230 Some(tokio::spawn(Connection::schedule_read(peer_manager, us, reader, read_receiver, write_receiver)))
232 // Note that we will skip socket_disconnected here, in accordance with the PeerManager
238 if let Some(handle) = handle_opt {
239 if let Err(e) = handle.await {
240 assert!(e.is_cancelled());
242 // This is certainly not guaranteed to always be true - the read loop may exit
243 // while there are still pending write wakers that need to be woken up after the
244 // socket shutdown(). Still, as a check during testing, to make sure tokio doesn't
245 // keep too many wakers around, this makes sense. The race should be rare (we do
246 // some work after shutdown()) and an error would be a major memory leak.
247 #[cfg(debug_assertions)]
248 assert!(Arc::try_unwrap(last_us).is_ok());
254 /// Process incoming messages and feed outgoing messages on the provided socket generated by
255 /// making an outbound connection which is expected to be accepted by a peer with the given
256 /// public key. The relevant processing is set to run free (via tokio::spawn).
258 /// The returned future will complete when the peer is disconnected and associated handling
259 /// futures are freed, though, because all processing futures are spawned with tokio::spawn, you do
260 /// not need to poll the provided future in order to make progress.
261 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
262 CMH: ChannelMessageHandler + 'static + Send + Sync,
263 RMH: RoutingMessageHandler + 'static + Send + Sync,
264 L: Logger + 'static + ?Sized + Send + Sync,
265 UMH: CustomMessageHandler + 'static + Send + Sync {
266 let (reader, mut write_receiver, read_receiver, us) = Connection::new(stream);
267 #[cfg(debug_assertions)]
268 let last_us = Arc::clone(&us);
270 let handle_opt = if let Ok(initial_send) = peer_manager.new_outbound_connection(their_node_id, SocketDescriptor::new(us.clone())) {
271 Some(tokio::spawn(async move {
272 // We should essentially always have enough room in a TCP socket buffer to send the
273 // initial 10s of bytes. However, tokio running in single-threaded mode will always
274 // fail writes and wake us back up later to write. Thus, we handle a single
275 // std::task::Poll::Pending but still expect to write the full set of bytes at once
276 // and use a relatively tight timeout.
277 if let Ok(Ok(())) = tokio::time::timeout(Duration::from_millis(100), async {
279 match SocketDescriptor::new(us.clone()).send_data(&initial_send, true) {
280 v if v == initial_send.len() => break Ok(()),
282 write_receiver.recv().await;
283 // In theory we could check for if we've been instructed to disconnect
284 // the peer here, but its OK to just skip it - we'll check for it in
285 // schedule_read prior to any relevant calls into RL.
288 eprintln!("Failed to write first full message to socket!");
289 peer_manager.socket_disconnected(&SocketDescriptor::new(Arc::clone(&us)));
295 Connection::schedule_read(peer_manager, us, reader, read_receiver, write_receiver).await;
299 // Note that we will skip socket_disconnected here, in accordance with the PeerManager
305 if let Some(handle) = handle_opt {
306 if let Err(e) = handle.await {
307 assert!(e.is_cancelled());
309 // This is certainly not guaranteed to always be true - the read loop may exit
310 // while there are still pending write wakers that need to be woken up after the
311 // socket shutdown(). Still, as a check during testing, to make sure tokio doesn't
312 // keep too many wakers around, this makes sense. The race should be rare (we do
313 // some work after shutdown()) and an error would be a major memory leak.
314 #[cfg(debug_assertions)]
315 assert!(Arc::try_unwrap(last_us).is_ok());
321 /// Process incoming messages and feed outgoing messages on a new connection made to the given
322 /// socket address which is expected to be accepted by a peer with the given public key (by
323 /// scheduling futures with tokio::spawn).
325 /// Shorthand for TcpStream::connect(addr) with a timeout followed by setup_outbound().
327 /// Returns a future (as the fn is async) which needs to be polled to complete the connection and
328 /// connection setup. That future then returns a future which will complete when the peer is
329 /// disconnected and associated handling futures are freed, though, because all processing in said
330 /// futures are spawned with tokio::spawn, you do not need to poll the second future in order to
332 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
333 CMH: ChannelMessageHandler + 'static + Send + Sync,
334 RMH: RoutingMessageHandler + 'static + Send + Sync,
335 L: Logger + 'static + ?Sized + Send + Sync,
336 UMH: CustomMessageHandler + 'static + Send + Sync {
337 if let Ok(Ok(stream)) = time::timeout(Duration::from_secs(10), async { TcpStream::connect(&addr).await.map(|s| s.into_std().unwrap()) }).await {
338 Some(setup_outbound(peer_manager, their_node_id, stream))
342 const SOCK_WAKER_VTABLE: task::RawWakerVTable =
343 task::RawWakerVTable::new(clone_socket_waker, wake_socket_waker, wake_socket_waker_by_ref, drop_socket_waker);
345 fn clone_socket_waker(orig_ptr: *const ()) -> task::RawWaker {
346 write_avail_to_waker(orig_ptr as *const mpsc::Sender<()>)
348 // When waking, an error should be fine. Most likely we got two send_datas in a row, both of which
349 // failed to fully write, but we only need to call write_buffer_space_avail() once. Otherwise, the
350 // sending thread may have already gone away due to a socket close, in which case there's nothing
351 // to wake up anyway.
352 fn wake_socket_waker(orig_ptr: *const ()) {
353 let sender = unsafe { &mut *(orig_ptr as *mut mpsc::Sender<()>) };
354 let _ = sender.try_send(());
355 drop_socket_waker(orig_ptr);
357 fn wake_socket_waker_by_ref(orig_ptr: *const ()) {
358 let sender_ptr = orig_ptr as *const mpsc::Sender<()>;
359 let sender = unsafe { (*sender_ptr).clone() };
360 let _ = sender.try_send(());
362 fn drop_socket_waker(orig_ptr: *const ()) {
363 let _orig_box = unsafe { Box::from_raw(orig_ptr as *mut mpsc::Sender<()>) };
364 // _orig_box is now dropped
366 fn write_avail_to_waker(sender: *const mpsc::Sender<()>) -> task::RawWaker {
367 let new_box = Box::leak(Box::new(unsafe { (*sender).clone() }));
368 let new_ptr = new_box as *const mpsc::Sender<()>;
369 task::RawWaker::new(new_ptr as *const (), &SOCK_WAKER_VTABLE)
372 /// The SocketDescriptor used to refer to sockets by a PeerHandler. This is pub only as it is a
373 /// type in the template of PeerHandler.
374 pub struct SocketDescriptor {
375 conn: Arc<Mutex<Connection>>,
378 impl SocketDescriptor {
379 fn new(conn: Arc<Mutex<Connection>>) -> Self {
380 let id = conn.lock().unwrap().id;
384 impl peer_handler::SocketDescriptor for SocketDescriptor {
385 fn send_data(&mut self, data: &[u8], resume_read: bool) -> usize {
386 // To send data, we take a lock on our Connection to access the WriteHalf of the TcpStream,
387 // writing to it if there's room in the kernel buffer, or otherwise create a new Waker with
388 // a SocketDescriptor in it which can wake up the write_avail Sender, waking up the
389 // processing future which will call write_buffer_space_avail and we'll end up back here.
390 let mut us = self.conn.lock().unwrap();
391 if us.writer.is_none() {
392 // The writer gets take()n when it is time to shut down, so just fast-return 0 here.
396 if resume_read && us.read_paused {
397 // The schedule_read future may go to lock up but end up getting woken up by there
398 // being more room in the write buffer, dropping the other end of this Sender
399 // before we get here, so we ignore any failures to wake it up.
400 us.read_paused = false;
401 let _ = us.read_waker.try_send(());
403 if data.is_empty() { return 0; }
404 let waker = unsafe { task::Waker::from_raw(write_avail_to_waker(&us.write_avail)) };
405 let mut ctx = task::Context::from_waker(&waker);
406 let mut written_len = 0;
408 match std::pin::Pin::new(us.writer.as_mut().unwrap()).poll_write(&mut ctx, &data[written_len..]) {
409 task::Poll::Ready(Ok(res)) => {
410 // The tokio docs *seem* to indicate this can't happen, and I certainly don't
411 // know how to handle it if it does (cause it should be a Poll::Pending
415 if written_len == data.len() { return written_len; }
417 task::Poll::Ready(Err(e)) => {
418 // The tokio docs *seem* to indicate this can't happen, and I certainly don't
419 // know how to handle it if it does (cause it should be a Poll::Pending
421 assert_ne!(e.kind(), io::ErrorKind::WouldBlock);
422 // Probably we've already been closed, just return what we have and let the
423 // read thread handle closing logic.
426 task::Poll::Pending => {
427 // We're queued up for a write event now, but we need to make sure we also
428 // pause read given we're now waiting on the remote end to ACK (and in
429 // accordance with the send_data() docs).
430 us.read_paused = true;
437 fn disconnect_socket(&mut self) {
438 let mut us = self.conn.lock().unwrap();
439 us.rl_requested_disconnect = true;
440 // Wake up the sending thread, assuming it is still alive
441 let _ = us.write_avail.try_send(());
444 impl Clone for SocketDescriptor {
445 fn clone(&self) -> Self {
447 conn: Arc::clone(&self.conn),
452 impl Eq for SocketDescriptor {}
453 impl PartialEq for SocketDescriptor {
454 fn eq(&self, o: &Self) -> bool {
458 impl Hash for SocketDescriptor {
459 fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
466 use lightning::ln::features::*;
467 use lightning::ln::msgs::*;
468 use lightning::ln::peer_handler::{MessageHandler, PeerManager};
469 use lightning::util::events::*;
470 use bitcoin::secp256k1::{Secp256k1, SecretKey, PublicKey};
472 use tokio::sync::mpsc;
475 use std::sync::atomic::{AtomicBool, Ordering};
476 use std::sync::{Arc, Mutex};
477 use std::time::Duration;
479 pub struct TestLogger();
480 impl lightning::util::logger::Logger for TestLogger {
481 fn log(&self, record: &lightning::util::logger::Record) {
482 println!("{:<5} [{} : {}, {}] {}", record.level.to_string(), record.module_path, record.file, record.line, record.args);
487 expected_pubkey: PublicKey,
488 pubkey_connected: mpsc::Sender<()>,
489 pubkey_disconnected: mpsc::Sender<()>,
490 disconnected_flag: AtomicBool,
491 msg_events: Mutex<Vec<MessageSendEvent>>,
493 impl RoutingMessageHandler for MsgHandler {
494 fn handle_node_announcement(&self, _msg: &NodeAnnouncement) -> Result<bool, LightningError> { Ok(false) }
495 fn handle_channel_announcement(&self, _msg: &ChannelAnnouncement) -> Result<bool, LightningError> { Ok(false) }
496 fn handle_channel_update(&self, _msg: &ChannelUpdate) -> Result<bool, LightningError> { Ok(false) }
497 fn get_next_channel_announcements(&self, _starting_point: u64, _batch_amount: u8) -> Vec<(ChannelAnnouncement, Option<ChannelUpdate>, Option<ChannelUpdate>)> { Vec::new() }
498 fn get_next_node_announcements(&self, _starting_point: Option<&PublicKey>, _batch_amount: u8) -> Vec<NodeAnnouncement> { Vec::new() }
499 fn sync_routing_table(&self, _their_node_id: &PublicKey, _init_msg: &Init) { }
500 fn handle_reply_channel_range(&self, _their_node_id: &PublicKey, _msg: ReplyChannelRange) -> Result<(), LightningError> { Ok(()) }
501 fn handle_reply_short_channel_ids_end(&self, _their_node_id: &PublicKey, _msg: ReplyShortChannelIdsEnd) -> Result<(), LightningError> { Ok(()) }
502 fn handle_query_channel_range(&self, _their_node_id: &PublicKey, _msg: QueryChannelRange) -> Result<(), LightningError> { Ok(()) }
503 fn handle_query_short_channel_ids(&self, _their_node_id: &PublicKey, _msg: QueryShortChannelIds) -> Result<(), LightningError> { Ok(()) }
505 impl ChannelMessageHandler for MsgHandler {
506 fn handle_open_channel(&self, _their_node_id: &PublicKey, _their_features: InitFeatures, _msg: &OpenChannel) {}
507 fn handle_accept_channel(&self, _their_node_id: &PublicKey, _their_features: InitFeatures, _msg: &AcceptChannel) {}
508 fn handle_funding_created(&self, _their_node_id: &PublicKey, _msg: &FundingCreated) {}
509 fn handle_funding_signed(&self, _their_node_id: &PublicKey, _msg: &FundingSigned) {}
510 fn handle_funding_locked(&self, _their_node_id: &PublicKey, _msg: &FundingLocked) {}
511 fn handle_shutdown(&self, _their_node_id: &PublicKey, _their_features: &InitFeatures, _msg: &Shutdown) {}
512 fn handle_closing_signed(&self, _their_node_id: &PublicKey, _msg: &ClosingSigned) {}
513 fn handle_update_add_htlc(&self, _their_node_id: &PublicKey, _msg: &UpdateAddHTLC) {}
514 fn handle_update_fulfill_htlc(&self, _their_node_id: &PublicKey, _msg: &UpdateFulfillHTLC) {}
515 fn handle_update_fail_htlc(&self, _their_node_id: &PublicKey, _msg: &UpdateFailHTLC) {}
516 fn handle_update_fail_malformed_htlc(&self, _their_node_id: &PublicKey, _msg: &UpdateFailMalformedHTLC) {}
517 fn handle_commitment_signed(&self, _their_node_id: &PublicKey, _msg: &CommitmentSigned) {}
518 fn handle_revoke_and_ack(&self, _their_node_id: &PublicKey, _msg: &RevokeAndACK) {}
519 fn handle_update_fee(&self, _their_node_id: &PublicKey, _msg: &UpdateFee) {}
520 fn handle_announcement_signatures(&self, _their_node_id: &PublicKey, _msg: &AnnouncementSignatures) {}
521 fn handle_channel_update(&self, _their_node_id: &PublicKey, _msg: &ChannelUpdate) {}
522 fn peer_disconnected(&self, their_node_id: &PublicKey, _no_connection_possible: bool) {
523 if *their_node_id == self.expected_pubkey {
524 self.disconnected_flag.store(true, Ordering::SeqCst);
525 self.pubkey_disconnected.clone().try_send(()).unwrap();
528 fn peer_connected(&self, their_node_id: &PublicKey, _msg: &Init) {
529 if *their_node_id == self.expected_pubkey {
530 self.pubkey_connected.clone().try_send(()).unwrap();
533 fn handle_channel_reestablish(&self, _their_node_id: &PublicKey, _msg: &ChannelReestablish) {}
534 fn handle_error(&self, _their_node_id: &PublicKey, _msg: &ErrorMessage) {}
536 impl MessageSendEventsProvider for MsgHandler {
537 fn get_and_clear_pending_msg_events(&self) -> Vec<MessageSendEvent> {
538 let mut ret = Vec::new();
539 mem::swap(&mut *self.msg_events.lock().unwrap(), &mut ret);
544 async fn do_basic_connection_test() {
545 let secp_ctx = Secp256k1::new();
546 let a_key = SecretKey::from_slice(&[1; 32]).unwrap();
547 let b_key = SecretKey::from_slice(&[1; 32]).unwrap();
548 let a_pub = PublicKey::from_secret_key(&secp_ctx, &a_key);
549 let b_pub = PublicKey::from_secret_key(&secp_ctx, &b_key);
551 let (a_connected_sender, mut a_connected) = mpsc::channel(1);
552 let (a_disconnected_sender, mut a_disconnected) = mpsc::channel(1);
553 let a_handler = Arc::new(MsgHandler {
554 expected_pubkey: b_pub,
555 pubkey_connected: a_connected_sender,
556 pubkey_disconnected: a_disconnected_sender,
557 disconnected_flag: AtomicBool::new(false),
558 msg_events: Mutex::new(Vec::new()),
560 let a_manager = Arc::new(PeerManager::new(MessageHandler {
561 chan_handler: Arc::clone(&a_handler),
562 route_handler: Arc::clone(&a_handler),
563 }, a_key.clone(), &[1; 32], Arc::new(TestLogger()), Arc::new(lightning::ln::peer_handler::IgnoringMessageHandler{})));
565 let (b_connected_sender, mut b_connected) = mpsc::channel(1);
566 let (b_disconnected_sender, mut b_disconnected) = mpsc::channel(1);
567 let b_handler = Arc::new(MsgHandler {
568 expected_pubkey: a_pub,
569 pubkey_connected: b_connected_sender,
570 pubkey_disconnected: b_disconnected_sender,
571 disconnected_flag: AtomicBool::new(false),
572 msg_events: Mutex::new(Vec::new()),
574 let b_manager = Arc::new(PeerManager::new(MessageHandler {
575 chan_handler: Arc::clone(&b_handler),
576 route_handler: Arc::clone(&b_handler),
577 }, b_key.clone(), &[2; 32], Arc::new(TestLogger()), Arc::new(lightning::ln::peer_handler::IgnoringMessageHandler{})));
579 // We bind on localhost, hoping the environment is properly configured with a local
580 // address. This may not always be the case in containers and the like, so if this test is
581 // failing for you check that you have a loopback interface and it is configured with
583 let (conn_a, conn_b) = if let Ok(listener) = std::net::TcpListener::bind("127.0.0.1:9735") {
584 (std::net::TcpStream::connect("127.0.0.1:9735").unwrap(), listener.accept().unwrap().0)
585 } else if let Ok(listener) = std::net::TcpListener::bind("127.0.0.1:9999") {
586 (std::net::TcpStream::connect("127.0.0.1:9999").unwrap(), listener.accept().unwrap().0)
587 } else if let Ok(listener) = std::net::TcpListener::bind("127.0.0.1:46926") {
588 (std::net::TcpStream::connect("127.0.0.1:46926").unwrap(), listener.accept().unwrap().0)
589 } else { panic!("Failed to bind to v4 localhost on common ports"); };
591 let fut_a = super::setup_outbound(Arc::clone(&a_manager), b_pub, conn_a);
592 let fut_b = super::setup_inbound(b_manager, conn_b);
594 tokio::time::timeout(Duration::from_secs(10), a_connected.recv()).await.unwrap();
595 tokio::time::timeout(Duration::from_secs(1), b_connected.recv()).await.unwrap();
597 a_handler.msg_events.lock().unwrap().push(MessageSendEvent::HandleError {
598 node_id: b_pub, action: ErrorAction::DisconnectPeer { msg: None }
600 assert!(!a_handler.disconnected_flag.load(Ordering::SeqCst));
601 assert!(!b_handler.disconnected_flag.load(Ordering::SeqCst));
603 a_manager.process_events();
604 tokio::time::timeout(Duration::from_secs(10), a_disconnected.recv()).await.unwrap();
605 tokio::time::timeout(Duration::from_secs(1), b_disconnected.recv()).await.unwrap();
606 assert!(a_handler.disconnected_flag.load(Ordering::SeqCst));
607 assert!(b_handler.disconnected_flag.load(Ordering::SeqCst));
613 #[tokio::test(flavor = "multi_thread")]
614 async fn basic_threaded_connection_test() {
615 do_basic_connection_test().await;
618 async fn basic_unthreaded_connection_test() {
619 do_basic_connection_test().await;