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) handlng mechanism, see 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 more. All three take a
22 //! [mpsc::Sender<()>](../tokio/sync/mpsc/struct.Sender.html) which is sent into every time
23 //! something occurs which may result in lightning [Events](../lightning/util/events/enum.Event.html).
24 //! The call site should, thus, look something like this:
26 //! use tokio::sync::mpsc;
27 //! use std::net::TcpStream;
28 //! use bitcoin::secp256k1::key::PublicKey;
29 //! use lightning::util::events::EventsProvider;
30 //! use std::net::SocketAddr;
31 //! use std::sync::Arc;
33 //! // Define concrete types for our high-level objects:
34 //! type TxBroadcaster = dyn lightning::chain::chaininterface::BroadcasterInterface;
35 //! type FeeEstimator = dyn lightning::chain::chaininterface::FeeEstimator;
36 //! type Logger = dyn lightning::util::logger::Logger;
37 //! type ChainAccess = dyn lightning::chain::Access;
38 //! type ChainFilter = dyn lightning::chain::Filter;
39 //! type DataPersister = dyn lightning::chain::channelmonitor::Persist<lightning::chain::keysinterface::InMemorySigner>;
40 //! type ChainMonitor = lightning::chain::chainmonitor::ChainMonitor<lightning::chain::keysinterface::InMemorySigner, Arc<ChainFilter>, Arc<TxBroadcaster>, Arc<FeeEstimator>, Arc<Logger>, Arc<DataPersister>>;
41 //! type ChannelManager = Arc<lightning::ln::channelmanager::SimpleArcChannelManager<ChainMonitor, TxBroadcaster, FeeEstimator, Logger>>;
42 //! type PeerManager = Arc<lightning::ln::peer_handler::SimpleArcPeerManager<lightning_net_tokio::SocketDescriptor, ChainMonitor, TxBroadcaster, FeeEstimator, ChainAccess, Logger>>;
44 //! // Connect to node with pubkey their_node_id at addr:
45 //! async fn connect_to_node(peer_manager: PeerManager, chain_monitor: Arc<ChainMonitor>, channel_manager: ChannelManager, their_node_id: PublicKey, addr: SocketAddr) {
46 //! let (sender, mut receiver) = mpsc::channel(2);
47 //! lightning_net_tokio::connect_outbound(peer_manager, sender, their_node_id, addr).await;
49 //! receiver.recv().await;
50 //! for _event in channel_manager.get_and_clear_pending_events().drain(..) {
51 //! // Handle the event!
53 //! for _event in chain_monitor.get_and_clear_pending_events().drain(..) {
54 //! // Handle the event!
59 //! // Begin reading from a newly accepted socket and talk to the peer:
60 //! async fn accept_socket(peer_manager: PeerManager, chain_monitor: Arc<ChainMonitor>, channel_manager: ChannelManager, socket: TcpStream) {
61 //! let (sender, mut receiver) = mpsc::channel(2);
62 //! lightning_net_tokio::setup_inbound(peer_manager, sender, socket);
64 //! receiver.recv().await;
65 //! for _event in channel_manager.get_and_clear_pending_events().drain(..) {
66 //! // Handle the event!
68 //! for _event in chain_monitor.get_and_clear_pending_events().drain(..) {
69 //! // Handle the event!
75 use bitcoin::secp256k1::key::PublicKey;
77 use tokio::net::TcpStream;
78 use tokio::{io, time};
79 use tokio::sync::mpsc;
80 use tokio::io::{AsyncReadExt, AsyncWrite, AsyncWriteExt};
82 use lightning::ln::peer_handler;
83 use lightning::ln::peer_handler::SocketDescriptor as LnSocketTrait;
84 use lightning::ln::msgs::{ChannelMessageHandler, RoutingMessageHandler};
85 use lightning::util::logger::Logger;
87 use std::{task, thread};
88 use std::net::SocketAddr;
89 use std::net::TcpStream as StdTcpStream;
90 use std::sync::{Arc, Mutex, MutexGuard};
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 event_notify: mpsc::Sender<()>,
103 // Because our PeerManager is templated by user-provided types, and we can't (as far as I can
104 // tell) have a const RawWakerVTable built out of templated functions, we need some indirection
105 // between being woken up with write-ready and calling PeerManager::write_buffer_space_avail.
106 // This provides that indirection, with a Sender which gets handed to the PeerManager Arc on
107 // the schedule_read stack.
109 // An alternative (likely more effecient) approach would involve creating a RawWakerVTable at
110 // runtime with functions templated by the Arc<PeerManager> type, calling
111 // write_buffer_space_avail directly from tokio's write wake, however doing so would require
112 // more unsafe voodo than I really feel like writing.
113 write_avail: mpsc::Sender<()>,
114 // When we are told by rust-lightning to pause read (because we have writes backing up), we do
115 // so by setting read_paused. At that point, the read task will stop reading bytes from the
116 // socket. To wake it up (without otherwise changing its state, we can push a value into this
118 read_waker: mpsc::Sender<()>,
119 // When we are told by rust-lightning to disconnect, we can't return to rust-lightning until we
120 // are sure we won't call any more read/write PeerManager functions with the same connection.
121 // This is set to true if we're in such a condition (with disconnect checked before with the
122 // top-level mutex held) and false when we can return.
123 block_disconnect_socket: bool,
125 rl_requested_disconnect: bool,
129 fn event_trigger(us: &mut MutexGuard<Self>) {
130 match us.event_notify.try_send(()) {
132 Err(mpsc::error::TrySendError::Full(_)) => {
133 // Ignore full errors as we just need the user to poll after this point, so if they
134 // haven't received the last send yet, it doesn't matter.
139 async fn schedule_read<CMH, RMH, L>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, Arc<CMH>, Arc<RMH>, Arc<L>>>, us: Arc<Mutex<Self>>, mut reader: io::ReadHalf<TcpStream>, mut read_wake_receiver: mpsc::Receiver<()>, mut write_avail_receiver: mpsc::Receiver<()>) where
140 CMH: ChannelMessageHandler + 'static,
141 RMH: RoutingMessageHandler + 'static,
142 L: Logger + 'static + ?Sized {
143 let peer_manager_ref = peer_manager.clone();
144 // 8KB is nice and big but also should never cause any issues with stack overflowing.
145 let mut buf = [0; 8192];
147 let mut our_descriptor = SocketDescriptor::new(us.clone());
148 // An enum describing why we did/are disconnecting:
150 // Rust-Lightning told us to disconnect, either by returning an Err or by calling
151 // SocketDescriptor::disconnect_socket.
152 // In this case, we do not call peer_manager.socket_disconnected() as Rust-Lightning
153 // already knows we're disconnected.
155 // The connection was disconnected for some other reason, ie because the socket was
157 // In this case, we do need to call peer_manager.socket_disconnected() to inform
158 // Rust-Lightning that the socket is gone.
161 let disconnect_type = loop {
162 macro_rules! shutdown_socket {
163 ($err: expr, $need_disconnect: expr) => { {
164 println!("Disconnecting peer due to {}!", $err);
165 break $need_disconnect;
169 macro_rules! prepare_read_write_call {
171 let mut us_lock = us.lock().unwrap();
172 if us_lock.rl_requested_disconnect {
173 shutdown_socket!("disconnect_socket() call from RL", Disconnect::CloseConnection);
175 us_lock.block_disconnect_socket = true;
179 let read_paused = us.lock().unwrap().read_paused;
181 v = write_avail_receiver.recv() => {
182 assert!(v.is_some()); // We can't have dropped the sending end, its in the us Arc!
183 prepare_read_write_call!();
184 if let Err(e) = peer_manager.write_buffer_space_avail(&mut our_descriptor) {
185 shutdown_socket!(e, Disconnect::CloseConnection);
187 us.lock().unwrap().block_disconnect_socket = false;
189 _ = read_wake_receiver.recv() => {},
190 read = reader.read(&mut buf), if !read_paused => match read {
191 Ok(0) => shutdown_socket!("Connection closed", Disconnect::PeerDisconnected),
193 prepare_read_write_call!();
194 let read_res = peer_manager.read_event(&mut our_descriptor, &buf[0..len]);
195 let mut us_lock = us.lock().unwrap();
199 us_lock.read_paused = true;
201 Self::event_trigger(&mut us_lock);
203 Err(e) => shutdown_socket!(e, Disconnect::CloseConnection),
205 us_lock.block_disconnect_socket = false;
207 Err(e) => shutdown_socket!(e, Disconnect::PeerDisconnected),
211 let writer_option = us.lock().unwrap().writer.take();
212 if let Some(mut writer) = writer_option {
213 // If the socket is already closed, shutdown() will fail, so just ignore it.
214 let _ = writer.shutdown().await;
216 if let Disconnect::PeerDisconnected = disconnect_type {
217 peer_manager_ref.socket_disconnected(&our_descriptor);
218 Self::event_trigger(&mut us.lock().unwrap());
222 fn new(event_notify: mpsc::Sender<()>, stream: StdTcpStream) -> (io::ReadHalf<TcpStream>, mpsc::Receiver<()>, mpsc::Receiver<()>, Arc<Mutex<Self>>) {
223 // We only ever need a channel of depth 1 here: if we returned a non-full write to the
224 // PeerManager, we will eventually get notified that there is room in the socket to write
225 // new bytes, which will generate an event. That event will be popped off the queue before
226 // we call write_buffer_space_avail, ensuring that we have room to push a new () if, during
227 // the write_buffer_space_avail() call, send_data() returns a non-full write.
228 let (write_avail, write_receiver) = mpsc::channel(1);
229 // Similarly here - our only goal is to make sure the reader wakes up at some point after
230 // we shove a value into the channel which comes after we've reset the read_paused bool to
232 let (read_waker, read_receiver) = mpsc::channel(1);
233 stream.set_nonblocking(true).unwrap();
234 let (reader, writer) = io::split(TcpStream::from_std(stream).unwrap());
236 (reader, write_receiver, read_receiver,
237 Arc::new(Mutex::new(Self {
238 writer: Some(writer), event_notify, write_avail, read_waker, read_paused: false,
239 block_disconnect_socket: false, rl_requested_disconnect: false,
240 id: ID_COUNTER.fetch_add(1, Ordering::AcqRel)
245 /// Process incoming messages and feed outgoing messages on the provided socket generated by
246 /// accepting an incoming connection.
248 /// The returned future will complete when the peer is disconnected and associated handling
249 /// futures are freed, though, because all processing futures are spawned with tokio::spawn, you do
250 /// not need to poll the provided future in order to make progress.
252 /// See the module-level documentation for how to handle the event_notify mpsc::Sender.
253 pub fn setup_inbound<CMH, RMH, L>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, Arc<CMH>, Arc<RMH>, Arc<L>>>, event_notify: mpsc::Sender<()>, stream: StdTcpStream) -> impl std::future::Future<Output=()> where
254 CMH: ChannelMessageHandler + 'static,
255 RMH: RoutingMessageHandler + 'static,
256 L: Logger + 'static + ?Sized {
257 let (reader, write_receiver, read_receiver, us) = Connection::new(event_notify, stream);
258 #[cfg(debug_assertions)]
259 let last_us = Arc::clone(&us);
261 let handle_opt = if let Ok(_) = peer_manager.new_inbound_connection(SocketDescriptor::new(us.clone())) {
262 Some(tokio::spawn(Connection::schedule_read(peer_manager, us, reader, read_receiver, write_receiver)))
264 // Note that we will skip socket_disconnected here, in accordance with the PeerManager
270 if let Some(handle) = handle_opt {
271 if let Err(e) = handle.await {
272 assert!(e.is_cancelled());
274 // This is certainly not guaranteed to always be true - the read loop may exit
275 // while there are still pending write wakers that need to be woken up after the
276 // socket shutdown(). Still, as a check during testing, to make sure tokio doesn't
277 // keep too many wakers around, this makes sense. The race should be rare (we do
278 // some work after shutdown()) and an error would be a major memory leak.
279 #[cfg(debug_assertions)]
280 assert!(Arc::try_unwrap(last_us).is_ok());
286 /// Process incoming messages and feed outgoing messages on the provided socket generated by
287 /// making an outbound connection which is expected to be accepted by a peer with the given
288 /// public key. The relevant processing is set to run free (via tokio::spawn).
290 /// The returned future will complete when the peer is disconnected and associated handling
291 /// futures are freed, though, because all processing futures are spawned with tokio::spawn, you do
292 /// not need to poll the provided future in order to make progress.
294 /// See the module-level documentation for how to handle the event_notify mpsc::Sender.
295 pub fn setup_outbound<CMH, RMH, L>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, Arc<CMH>, Arc<RMH>, Arc<L>>>, event_notify: mpsc::Sender<()>, their_node_id: PublicKey, stream: StdTcpStream) -> impl std::future::Future<Output=()> where
296 CMH: ChannelMessageHandler + 'static,
297 RMH: RoutingMessageHandler + 'static,
298 L: Logger + 'static + ?Sized {
299 let (reader, mut write_receiver, read_receiver, us) = Connection::new(event_notify, stream);
300 #[cfg(debug_assertions)]
301 let last_us = Arc::clone(&us);
303 let handle_opt = if let Ok(initial_send) = peer_manager.new_outbound_connection(their_node_id, SocketDescriptor::new(us.clone())) {
304 Some(tokio::spawn(async move {
305 // We should essentially always have enough room in a TCP socket buffer to send the
306 // initial 10s of bytes. However, tokio running in single-threaded mode will always
307 // fail writes and wake us back up later to write. Thus, we handle a single
308 // std::task::Poll::Pending but still expect to write the full set of bytes at once
309 // and use a relatively tight timeout.
310 if let Ok(Ok(())) = tokio::time::timeout(Duration::from_millis(100), async {
312 match SocketDescriptor::new(us.clone()).send_data(&initial_send, true) {
313 v if v == initial_send.len() => break Ok(()),
315 write_receiver.recv().await;
316 // In theory we could check for if we've been instructed to disconnect
317 // the peer here, but its OK to just skip it - we'll check for it in
318 // schedule_read prior to any relevant calls into RL.
321 eprintln!("Failed to write first full message to socket!");
322 peer_manager.socket_disconnected(&SocketDescriptor::new(Arc::clone(&us)));
328 Connection::schedule_read(peer_manager, us, reader, read_receiver, write_receiver).await;
332 // Note that we will skip socket_disconnected here, in accordance with the PeerManager
338 if let Some(handle) = handle_opt {
339 if let Err(e) = handle.await {
340 assert!(e.is_cancelled());
342 // This is certainly not guaranteed to always be true - the read loop may exit
343 // while there are still pending write wakers that need to be woken up after the
344 // socket shutdown(). Still, as a check during testing, to make sure tokio doesn't
345 // keep too many wakers around, this makes sense. The race should be rare (we do
346 // some work after shutdown()) and an error would be a major memory leak.
347 #[cfg(debug_assertions)]
348 assert!(Arc::try_unwrap(last_us).is_ok());
354 /// Process incoming messages and feed outgoing messages on a new connection made to the given
355 /// socket address which is expected to be accepted by a peer with the given public key (by
356 /// scheduling futures with tokio::spawn).
358 /// Shorthand for TcpStream::connect(addr) with a timeout followed by setup_outbound().
360 /// Returns a future (as the fn is async) which needs to be polled to complete the connection and
361 /// connection setup. That future then returns a future which will complete when the peer is
362 /// disconnected and associated handling futures are freed, though, because all processing in said
363 /// futures are spawned with tokio::spawn, you do not need to poll the second future in order to
366 /// See the module-level documentation for how to handle the event_notify mpsc::Sender.
367 pub async fn connect_outbound<CMH, RMH, L>(peer_manager: Arc<peer_handler::PeerManager<SocketDescriptor, Arc<CMH>, Arc<RMH>, Arc<L>>>, event_notify: mpsc::Sender<()>, their_node_id: PublicKey, addr: SocketAddr) -> Option<impl std::future::Future<Output=()>> where
368 CMH: ChannelMessageHandler + 'static,
369 RMH: RoutingMessageHandler + 'static,
370 L: Logger + 'static + ?Sized {
371 if let Ok(Ok(stream)) = time::timeout(Duration::from_secs(10), async { TcpStream::connect(&addr).await.map(|s| s.into_std().unwrap()) }).await {
372 Some(setup_outbound(peer_manager, event_notify, their_node_id, stream))
376 const SOCK_WAKER_VTABLE: task::RawWakerVTable =
377 task::RawWakerVTable::new(clone_socket_waker, wake_socket_waker, wake_socket_waker_by_ref, drop_socket_waker);
379 fn clone_socket_waker(orig_ptr: *const ()) -> task::RawWaker {
380 write_avail_to_waker(orig_ptr as *const mpsc::Sender<()>)
382 // When waking, an error should be fine. Most likely we got two send_datas in a row, both of which
383 // failed to fully write, but we only need to call write_buffer_space_avail() once. Otherwise, the
384 // sending thread may have already gone away due to a socket close, in which case there's nothing
385 // to wake up anyway.
386 fn wake_socket_waker(orig_ptr: *const ()) {
387 let sender = unsafe { &mut *(orig_ptr as *mut mpsc::Sender<()>) };
388 let _ = sender.try_send(());
389 drop_socket_waker(orig_ptr);
391 fn wake_socket_waker_by_ref(orig_ptr: *const ()) {
392 let sender_ptr = orig_ptr as *const mpsc::Sender<()>;
393 let sender = unsafe { (*sender_ptr).clone() };
394 let _ = sender.try_send(());
396 fn drop_socket_waker(orig_ptr: *const ()) {
397 let _orig_box = unsafe { Box::from_raw(orig_ptr as *mut mpsc::Sender<()>) };
398 // _orig_box is now dropped
400 fn write_avail_to_waker(sender: *const mpsc::Sender<()>) -> task::RawWaker {
401 let new_box = Box::leak(Box::new(unsafe { (*sender).clone() }));
402 let new_ptr = new_box as *const mpsc::Sender<()>;
403 task::RawWaker::new(new_ptr as *const (), &SOCK_WAKER_VTABLE)
406 /// The SocketDescriptor used to refer to sockets by a PeerHandler. This is pub only as it is a
407 /// type in the template of PeerHandler.
408 pub struct SocketDescriptor {
409 conn: Arc<Mutex<Connection>>,
412 impl SocketDescriptor {
413 fn new(conn: Arc<Mutex<Connection>>) -> Self {
414 let id = conn.lock().unwrap().id;
418 impl peer_handler::SocketDescriptor for SocketDescriptor {
419 fn send_data(&mut self, data: &[u8], resume_read: bool) -> usize {
420 // To send data, we take a lock on our Connection to access the WriteHalf of the TcpStream,
421 // writing to it if there's room in the kernel buffer, or otherwise create a new Waker with
422 // a SocketDescriptor in it which can wake up the write_avail Sender, waking up the
423 // processing future which will call write_buffer_space_avail and we'll end up back here.
424 let mut us = self.conn.lock().unwrap();
425 if us.writer.is_none() {
426 // The writer gets take()n when it is time to shut down, so just fast-return 0 here.
430 if resume_read && us.read_paused {
431 // The schedule_read future may go to lock up but end up getting woken up by there
432 // being more room in the write buffer, dropping the other end of this Sender
433 // before we get here, so we ignore any failures to wake it up.
434 us.read_paused = false;
435 let _ = us.read_waker.try_send(());
437 if data.is_empty() { return 0; }
438 let waker = unsafe { task::Waker::from_raw(write_avail_to_waker(&us.write_avail)) };
439 let mut ctx = task::Context::from_waker(&waker);
440 let mut written_len = 0;
442 match std::pin::Pin::new(us.writer.as_mut().unwrap()).poll_write(&mut ctx, &data[written_len..]) {
443 task::Poll::Ready(Ok(res)) => {
444 // The tokio docs *seem* to indicate this can't happen, and I certainly don't
445 // know how to handle it if it does (cause it should be a Poll::Pending
449 if written_len == data.len() { return written_len; }
451 task::Poll::Ready(Err(e)) => {
452 // The tokio docs *seem* to indicate this can't happen, and I certainly don't
453 // know how to handle it if it does (cause it should be a Poll::Pending
455 assert_ne!(e.kind(), io::ErrorKind::WouldBlock);
456 // Probably we've already been closed, just return what we have and let the
457 // read thread handle closing logic.
460 task::Poll::Pending => {
461 // We're queued up for a write event now, but we need to make sure we also
462 // pause read given we're now waiting on the remote end to ACK (and in
463 // accordance with the send_data() docs).
464 us.read_paused = true;
471 fn disconnect_socket(&mut self) {
473 let mut us = self.conn.lock().unwrap();
474 us.rl_requested_disconnect = true;
475 us.read_paused = true;
476 // Wake up the sending thread, assuming it is still alive
477 let _ = us.write_avail.try_send(());
478 // Happy-path return:
479 if !us.block_disconnect_socket { return; }
481 while self.conn.lock().unwrap().block_disconnect_socket {
486 impl Clone for SocketDescriptor {
487 fn clone(&self) -> Self {
489 conn: Arc::clone(&self.conn),
494 impl Eq for SocketDescriptor {}
495 impl PartialEq for SocketDescriptor {
496 fn eq(&self, o: &Self) -> bool {
500 impl Hash for SocketDescriptor {
501 fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
508 use lightning::ln::features::*;
509 use lightning::ln::msgs::*;
510 use lightning::ln::peer_handler::{MessageHandler, PeerManager};
511 use lightning::util::events::*;
512 use bitcoin::secp256k1::{Secp256k1, SecretKey, PublicKey};
514 use tokio::sync::mpsc;
517 use std::sync::atomic::{AtomicBool, Ordering};
518 use std::sync::{Arc, Mutex};
519 use std::time::Duration;
521 pub struct TestLogger();
522 impl lightning::util::logger::Logger for TestLogger {
523 fn log(&self, record: &lightning::util::logger::Record) {
524 println!("{:<5} [{} : {}, {}] {}", record.level.to_string(), record.module_path, record.file, record.line, record.args);
529 expected_pubkey: PublicKey,
530 pubkey_connected: mpsc::Sender<()>,
531 pubkey_disconnected: mpsc::Sender<()>,
532 disconnected_flag: AtomicBool,
533 msg_events: Mutex<Vec<MessageSendEvent>>,
535 impl RoutingMessageHandler for MsgHandler {
536 fn handle_node_announcement(&self, _msg: &NodeAnnouncement) -> Result<bool, LightningError> { Ok(false) }
537 fn handle_channel_announcement(&self, _msg: &ChannelAnnouncement) -> Result<bool, LightningError> { Ok(false) }
538 fn handle_channel_update(&self, _msg: &ChannelUpdate) -> Result<bool, LightningError> { Ok(false) }
539 fn handle_htlc_fail_channel_update(&self, _update: &HTLCFailChannelUpdate) { }
540 fn get_next_channel_announcements(&self, _starting_point: u64, _batch_amount: u8) -> Vec<(ChannelAnnouncement, Option<ChannelUpdate>, Option<ChannelUpdate>)> { Vec::new() }
541 fn get_next_node_announcements(&self, _starting_point: Option<&PublicKey>, _batch_amount: u8) -> Vec<NodeAnnouncement> { Vec::new() }
542 fn sync_routing_table(&self, _their_node_id: &PublicKey, _init_msg: &Init) { }
543 fn handle_reply_channel_range(&self, _their_node_id: &PublicKey, _msg: ReplyChannelRange) -> Result<(), LightningError> { Ok(()) }
544 fn handle_reply_short_channel_ids_end(&self, _their_node_id: &PublicKey, _msg: ReplyShortChannelIdsEnd) -> Result<(), LightningError> { Ok(()) }
545 fn handle_query_channel_range(&self, _their_node_id: &PublicKey, _msg: QueryChannelRange) -> Result<(), LightningError> { Ok(()) }
546 fn handle_query_short_channel_ids(&self, _their_node_id: &PublicKey, _msg: QueryShortChannelIds) -> Result<(), LightningError> { Ok(()) }
548 impl ChannelMessageHandler for MsgHandler {
549 fn handle_open_channel(&self, _their_node_id: &PublicKey, _their_features: InitFeatures, _msg: &OpenChannel) {}
550 fn handle_accept_channel(&self, _their_node_id: &PublicKey, _their_features: InitFeatures, _msg: &AcceptChannel) {}
551 fn handle_funding_created(&self, _their_node_id: &PublicKey, _msg: &FundingCreated) {}
552 fn handle_funding_signed(&self, _their_node_id: &PublicKey, _msg: &FundingSigned) {}
553 fn handle_funding_locked(&self, _their_node_id: &PublicKey, _msg: &FundingLocked) {}
554 fn handle_shutdown(&self, _their_node_id: &PublicKey, _their_features: &InitFeatures, _msg: &Shutdown) {}
555 fn handle_closing_signed(&self, _their_node_id: &PublicKey, _msg: &ClosingSigned) {}
556 fn handle_update_add_htlc(&self, _their_node_id: &PublicKey, _msg: &UpdateAddHTLC) {}
557 fn handle_update_fulfill_htlc(&self, _their_node_id: &PublicKey, _msg: &UpdateFulfillHTLC) {}
558 fn handle_update_fail_htlc(&self, _their_node_id: &PublicKey, _msg: &UpdateFailHTLC) {}
559 fn handle_update_fail_malformed_htlc(&self, _their_node_id: &PublicKey, _msg: &UpdateFailMalformedHTLC) {}
560 fn handle_commitment_signed(&self, _their_node_id: &PublicKey, _msg: &CommitmentSigned) {}
561 fn handle_revoke_and_ack(&self, _their_node_id: &PublicKey, _msg: &RevokeAndACK) {}
562 fn handle_update_fee(&self, _their_node_id: &PublicKey, _msg: &UpdateFee) {}
563 fn handle_announcement_signatures(&self, _their_node_id: &PublicKey, _msg: &AnnouncementSignatures) {}
564 fn peer_disconnected(&self, their_node_id: &PublicKey, _no_connection_possible: bool) {
565 if *their_node_id == self.expected_pubkey {
566 self.disconnected_flag.store(true, Ordering::SeqCst);
567 self.pubkey_disconnected.clone().try_send(()).unwrap();
570 fn peer_connected(&self, their_node_id: &PublicKey, _msg: &Init) {
571 if *their_node_id == self.expected_pubkey {
572 self.pubkey_connected.clone().try_send(()).unwrap();
575 fn handle_channel_reestablish(&self, _their_node_id: &PublicKey, _msg: &ChannelReestablish) {}
576 fn handle_error(&self, _their_node_id: &PublicKey, _msg: &ErrorMessage) {}
578 impl MessageSendEventsProvider for MsgHandler {
579 fn get_and_clear_pending_msg_events(&self) -> Vec<MessageSendEvent> {
580 let mut ret = Vec::new();
581 mem::swap(&mut *self.msg_events.lock().unwrap(), &mut ret);
586 async fn do_basic_connection_test() {
587 let secp_ctx = Secp256k1::new();
588 let a_key = SecretKey::from_slice(&[1; 32]).unwrap();
589 let b_key = SecretKey::from_slice(&[1; 32]).unwrap();
590 let a_pub = PublicKey::from_secret_key(&secp_ctx, &a_key);
591 let b_pub = PublicKey::from_secret_key(&secp_ctx, &b_key);
593 let (a_connected_sender, mut a_connected) = mpsc::channel(1);
594 let (a_disconnected_sender, mut a_disconnected) = mpsc::channel(1);
595 let a_handler = Arc::new(MsgHandler {
596 expected_pubkey: b_pub,
597 pubkey_connected: a_connected_sender,
598 pubkey_disconnected: a_disconnected_sender,
599 disconnected_flag: AtomicBool::new(false),
600 msg_events: Mutex::new(Vec::new()),
602 let a_manager = Arc::new(PeerManager::new(MessageHandler {
603 chan_handler: Arc::clone(&a_handler),
604 route_handler: Arc::clone(&a_handler),
605 }, a_key.clone(), &[1; 32], Arc::new(TestLogger())));
607 let (b_connected_sender, mut b_connected) = mpsc::channel(1);
608 let (b_disconnected_sender, mut b_disconnected) = mpsc::channel(1);
609 let b_handler = Arc::new(MsgHandler {
610 expected_pubkey: a_pub,
611 pubkey_connected: b_connected_sender,
612 pubkey_disconnected: b_disconnected_sender,
613 disconnected_flag: AtomicBool::new(false),
614 msg_events: Mutex::new(Vec::new()),
616 let b_manager = Arc::new(PeerManager::new(MessageHandler {
617 chan_handler: Arc::clone(&b_handler),
618 route_handler: Arc::clone(&b_handler),
619 }, b_key.clone(), &[2; 32], Arc::new(TestLogger())));
621 // We bind on localhost, hoping the environment is properly configured with a local
622 // address. This may not always be the case in containers and the like, so if this test is
623 // failing for you check that you have a loopback interface and it is configured with
625 let (conn_a, conn_b) = if let Ok(listener) = std::net::TcpListener::bind("127.0.0.1:9735") {
626 (std::net::TcpStream::connect("127.0.0.1:9735").unwrap(), listener.accept().unwrap().0)
627 } else if let Ok(listener) = std::net::TcpListener::bind("127.0.0.1:9999") {
628 (std::net::TcpStream::connect("127.0.0.1:9999").unwrap(), listener.accept().unwrap().0)
629 } else if let Ok(listener) = std::net::TcpListener::bind("127.0.0.1:46926") {
630 (std::net::TcpStream::connect("127.0.0.1:46926").unwrap(), listener.accept().unwrap().0)
631 } else { panic!("Failed to bind to v4 localhost on common ports"); };
633 let (sender, _receiver) = mpsc::channel(2);
634 let fut_a = super::setup_outbound(Arc::clone(&a_manager), sender.clone(), b_pub, conn_a);
635 let fut_b = super::setup_inbound(b_manager, sender, conn_b);
637 tokio::time::timeout(Duration::from_secs(10), a_connected.recv()).await.unwrap();
638 tokio::time::timeout(Duration::from_secs(1), b_connected.recv()).await.unwrap();
640 a_handler.msg_events.lock().unwrap().push(MessageSendEvent::HandleError {
641 node_id: b_pub, action: ErrorAction::DisconnectPeer { msg: None }
643 assert!(!a_handler.disconnected_flag.load(Ordering::SeqCst));
644 assert!(!b_handler.disconnected_flag.load(Ordering::SeqCst));
646 a_manager.process_events();
647 tokio::time::timeout(Duration::from_secs(10), a_disconnected.recv()).await.unwrap();
648 tokio::time::timeout(Duration::from_secs(1), b_disconnected.recv()).await.unwrap();
649 assert!(a_handler.disconnected_flag.load(Ordering::SeqCst));
650 assert!(b_handler.disconnected_flag.load(Ordering::SeqCst));
656 #[tokio::test(flavor = "multi_thread")]
657 async fn basic_threaded_connection_test() {
658 do_basic_connection_test().await;
661 async fn basic_unthreaded_connection_test() {
662 do_basic_connection_test().await;