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 //! Top level peer message handling and socket handling logic lives here.
12 //! Instead of actually servicing sockets ourselves we require that you implement the
13 //! SocketDescriptor interface and use that to receive actions which you should perform on the
14 //! socket, and call into PeerManager with bytes read from the socket. The PeerManager will then
15 //! call into the provided message handlers (probably a ChannelManager and NetGraphmsgHandler) with messages
16 //! they should handle, and encoding/sending response messages.
18 use bitcoin::secp256k1::key::{SecretKey,PublicKey};
20 use ln::features::InitFeatures;
22 use ln::msgs::{ChannelMessageHandler, LightningError, RoutingMessageHandler};
23 use ln::channelmanager::{SimpleArcChannelManager, SimpleRefChannelManager};
24 use util::ser::{VecWriter, Writeable, Writer};
25 use ln::peer_channel_encryptor::{PeerChannelEncryptor,NextNoiseStep};
28 use util::events::{MessageSendEvent, MessageSendEventsProvider};
29 use util::logger::Logger;
30 use routing::network_graph::NetGraphMsgHandler;
34 use alloc::collections::LinkedList;
35 use sync::{Arc, Mutex};
36 use core::sync::atomic::{AtomicUsize, Ordering};
37 use core::{cmp, hash, fmt, mem};
39 use core::convert::Infallible;
40 #[cfg(feature = "std")] use std::error;
42 use bitcoin::hashes::sha256::Hash as Sha256;
43 use bitcoin::hashes::sha256::HashEngine as Sha256Engine;
44 use bitcoin::hashes::{HashEngine, Hash};
46 /// Handler for BOLT1-compliant messages.
47 pub trait CustomMessageHandler: wire::CustomMessageReader {
48 /// Called with the message type that was received and the buffer to be read.
49 /// Can return a `MessageHandlingError` if the message could not be handled.
50 fn handle_custom_message(&self, msg: Self::CustomMessage, sender_node_id: &PublicKey) -> Result<(), LightningError>;
52 /// Gets the list of pending messages which were generated by the custom message
53 /// handler, clearing the list in the process. The first tuple element must
54 /// correspond to the intended recipients node ids. If no connection to one of the
55 /// specified node does not exist, the message is simply not sent to it.
56 fn get_and_clear_pending_msg(&self) -> Vec<(PublicKey, Self::CustomMessage)>;
59 /// A dummy struct which implements `RoutingMessageHandler` without storing any routing information
60 /// or doing any processing. You can provide one of these as the route_handler in a MessageHandler.
61 pub struct IgnoringMessageHandler{}
62 impl MessageSendEventsProvider for IgnoringMessageHandler {
63 fn get_and_clear_pending_msg_events(&self) -> Vec<MessageSendEvent> { Vec::new() }
65 impl RoutingMessageHandler for IgnoringMessageHandler {
66 fn handle_node_announcement(&self, _msg: &msgs::NodeAnnouncement) -> Result<bool, LightningError> { Ok(false) }
67 fn handle_channel_announcement(&self, _msg: &msgs::ChannelAnnouncement) -> Result<bool, LightningError> { Ok(false) }
68 fn handle_channel_update(&self, _msg: &msgs::ChannelUpdate) -> Result<bool, LightningError> { Ok(false) }
69 fn get_next_channel_announcements(&self, _starting_point: u64, _batch_amount: u8) ->
70 Vec<(msgs::ChannelAnnouncement, Option<msgs::ChannelUpdate>, Option<msgs::ChannelUpdate>)> { Vec::new() }
71 fn get_next_node_announcements(&self, _starting_point: Option<&PublicKey>, _batch_amount: u8) -> Vec<msgs::NodeAnnouncement> { Vec::new() }
72 fn sync_routing_table(&self, _their_node_id: &PublicKey, _init: &msgs::Init) {}
73 fn handle_reply_channel_range(&self, _their_node_id: &PublicKey, _msg: msgs::ReplyChannelRange) -> Result<(), LightningError> { Ok(()) }
74 fn handle_reply_short_channel_ids_end(&self, _their_node_id: &PublicKey, _msg: msgs::ReplyShortChannelIdsEnd) -> Result<(), LightningError> { Ok(()) }
75 fn handle_query_channel_range(&self, _their_node_id: &PublicKey, _msg: msgs::QueryChannelRange) -> Result<(), LightningError> { Ok(()) }
76 fn handle_query_short_channel_ids(&self, _their_node_id: &PublicKey, _msg: msgs::QueryShortChannelIds) -> Result<(), LightningError> { Ok(()) }
78 impl Deref for IgnoringMessageHandler {
79 type Target = IgnoringMessageHandler;
80 fn deref(&self) -> &Self { self }
83 // Implement Type for Infallible, note that it cannot be constructed, and thus you can never call a
84 // method that takes self for it.
85 impl wire::Type for Infallible {
86 fn type_id(&self) -> u16 {
90 impl Writeable for Infallible {
91 fn write<W: Writer>(&self, _: &mut W) -> Result<(), io::Error> {
96 impl wire::CustomMessageReader for IgnoringMessageHandler {
97 type CustomMessage = Infallible;
98 fn read<R: io::Read>(&self, _message_type: u16, _buffer: &mut R) -> Result<Option<Self::CustomMessage>, msgs::DecodeError> {
103 impl CustomMessageHandler for IgnoringMessageHandler {
104 fn handle_custom_message(&self, _msg: Infallible, _sender_node_id: &PublicKey) -> Result<(), LightningError> {
105 // Since we always return `None` in the read the handle method should never be called.
109 fn get_and_clear_pending_msg(&self) -> Vec<(PublicKey, Self::CustomMessage)> { Vec::new() }
112 /// A dummy struct which implements `ChannelMessageHandler` without having any channels.
113 /// You can provide one of these as the route_handler in a MessageHandler.
114 pub struct ErroringMessageHandler {
115 message_queue: Mutex<Vec<MessageSendEvent>>
117 impl ErroringMessageHandler {
118 /// Constructs a new ErroringMessageHandler
119 pub fn new() -> Self {
120 Self { message_queue: Mutex::new(Vec::new()) }
122 fn push_error(&self, node_id: &PublicKey, channel_id: [u8; 32]) {
123 self.message_queue.lock().unwrap().push(MessageSendEvent::HandleError {
124 action: msgs::ErrorAction::SendErrorMessage {
125 msg: msgs::ErrorMessage { channel_id, data: "We do not support channel messages, sorry.".to_owned() },
127 node_id: node_id.clone(),
131 impl MessageSendEventsProvider for ErroringMessageHandler {
132 fn get_and_clear_pending_msg_events(&self) -> Vec<MessageSendEvent> {
133 let mut res = Vec::new();
134 mem::swap(&mut res, &mut self.message_queue.lock().unwrap());
138 impl ChannelMessageHandler for ErroringMessageHandler {
139 // Any messages which are related to a specific channel generate an error message to let the
140 // peer know we don't care about channels.
141 fn handle_open_channel(&self, their_node_id: &PublicKey, _their_features: InitFeatures, msg: &msgs::OpenChannel) {
142 ErroringMessageHandler::push_error(self, their_node_id, msg.temporary_channel_id);
144 fn handle_accept_channel(&self, their_node_id: &PublicKey, _their_features: InitFeatures, msg: &msgs::AcceptChannel) {
145 ErroringMessageHandler::push_error(self, their_node_id, msg.temporary_channel_id);
147 fn handle_funding_created(&self, their_node_id: &PublicKey, msg: &msgs::FundingCreated) {
148 ErroringMessageHandler::push_error(self, their_node_id, msg.temporary_channel_id);
150 fn handle_funding_signed(&self, their_node_id: &PublicKey, msg: &msgs::FundingSigned) {
151 ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id);
153 fn handle_funding_locked(&self, their_node_id: &PublicKey, msg: &msgs::FundingLocked) {
154 ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id);
156 fn handle_shutdown(&self, their_node_id: &PublicKey, _their_features: &InitFeatures, msg: &msgs::Shutdown) {
157 ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id);
159 fn handle_closing_signed(&self, their_node_id: &PublicKey, msg: &msgs::ClosingSigned) {
160 ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id);
162 fn handle_update_add_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateAddHTLC) {
163 ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id);
165 fn handle_update_fulfill_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFulfillHTLC) {
166 ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id);
168 fn handle_update_fail_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFailHTLC) {
169 ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id);
171 fn handle_update_fail_malformed_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFailMalformedHTLC) {
172 ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id);
174 fn handle_commitment_signed(&self, their_node_id: &PublicKey, msg: &msgs::CommitmentSigned) {
175 ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id);
177 fn handle_revoke_and_ack(&self, their_node_id: &PublicKey, msg: &msgs::RevokeAndACK) {
178 ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id);
180 fn handle_update_fee(&self, their_node_id: &PublicKey, msg: &msgs::UpdateFee) {
181 ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id);
183 fn handle_announcement_signatures(&self, their_node_id: &PublicKey, msg: &msgs::AnnouncementSignatures) {
184 ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id);
186 fn handle_channel_reestablish(&self, their_node_id: &PublicKey, msg: &msgs::ChannelReestablish) {
187 ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id);
189 // msgs::ChannelUpdate does not contain the channel_id field, so we just drop them.
190 fn handle_channel_update(&self, _their_node_id: &PublicKey, _msg: &msgs::ChannelUpdate) {}
191 fn peer_disconnected(&self, _their_node_id: &PublicKey, _no_connection_possible: bool) {}
192 fn peer_connected(&self, _their_node_id: &PublicKey, _msg: &msgs::Init) {}
193 fn handle_error(&self, _their_node_id: &PublicKey, _msg: &msgs::ErrorMessage) {}
195 impl Deref for ErroringMessageHandler {
196 type Target = ErroringMessageHandler;
197 fn deref(&self) -> &Self { self }
200 /// Provides references to trait impls which handle different types of messages.
201 pub struct MessageHandler<CM: Deref, RM: Deref> where
202 CM::Target: ChannelMessageHandler,
203 RM::Target: RoutingMessageHandler {
204 /// A message handler which handles messages specific to channels. Usually this is just a
205 /// [`ChannelManager`] object or an [`ErroringMessageHandler`].
207 /// [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
208 pub chan_handler: CM,
209 /// A message handler which handles messages updating our knowledge of the network channel
210 /// graph. Usually this is just a [`NetGraphMsgHandler`] object or an
211 /// [`IgnoringMessageHandler`].
213 /// [`NetGraphMsgHandler`]: crate::routing::network_graph::NetGraphMsgHandler
214 pub route_handler: RM,
217 /// Provides an object which can be used to send data to and which uniquely identifies a connection
218 /// to a remote host. You will need to be able to generate multiple of these which meet Eq and
219 /// implement Hash to meet the PeerManager API.
221 /// For efficiency, Clone should be relatively cheap for this type.
223 /// Two descriptors may compare equal (by [`cmp::Eq`] and [`hash::Hash`]) as long as the original
224 /// has been disconnected, the [`PeerManager`] has been informed of the disconnection (either by it
225 /// having triggered the disconnection or a call to [`PeerManager::socket_disconnected`]), and no
226 /// further calls to the [`PeerManager`] related to the original socket occur. This allows you to
227 /// use a file descriptor for your SocketDescriptor directly, however for simplicity you may wish
228 /// to simply use another value which is guaranteed to be globally unique instead.
229 pub trait SocketDescriptor : cmp::Eq + hash::Hash + Clone {
230 /// Attempts to send some data from the given slice to the peer.
232 /// Returns the amount of data which was sent, possibly 0 if the socket has since disconnected.
233 /// Note that in the disconnected case, [`PeerManager::socket_disconnected`] must still be
234 /// called and further write attempts may occur until that time.
236 /// If the returned size is smaller than `data.len()`, a
237 /// [`PeerManager::write_buffer_space_avail`] call must be made the next time more data can be
238 /// written. Additionally, until a `send_data` event completes fully, no further
239 /// [`PeerManager::read_event`] calls should be made for the same peer! Because this is to
240 /// prevent denial-of-service issues, you should not read or buffer any data from the socket
243 /// If a [`PeerManager::read_event`] call on this descriptor had previously returned true
244 /// (indicating that read events should be paused to prevent DoS in the send buffer),
245 /// `resume_read` may be set indicating that read events on this descriptor should resume. A
246 /// `resume_read` of false carries no meaning, and should not cause any action.
247 fn send_data(&mut self, data: &[u8], resume_read: bool) -> usize;
248 /// Disconnect the socket pointed to by this SocketDescriptor.
250 /// You do *not* need to call [`PeerManager::socket_disconnected`] with this socket after this
251 /// call (doing so is a noop).
252 fn disconnect_socket(&mut self);
255 /// Error for PeerManager errors. If you get one of these, you must disconnect the socket and
256 /// generate no further read_event/write_buffer_space_avail/socket_disconnected calls for the
259 pub struct PeerHandleError {
260 /// Used to indicate that we probably can't make any future connections to this peer, implying
261 /// we should go ahead and force-close any channels we have with it.
262 pub no_connection_possible: bool,
264 impl fmt::Debug for PeerHandleError {
265 fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
266 formatter.write_str("Peer Sent Invalid Data")
269 impl fmt::Display for PeerHandleError {
270 fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
271 formatter.write_str("Peer Sent Invalid Data")
275 #[cfg(feature = "std")]
276 impl error::Error for PeerHandleError {
277 fn description(&self) -> &str {
278 "Peer Sent Invalid Data"
282 enum InitSyncTracker{
284 ChannelsSyncing(u64),
285 NodesSyncing(PublicKey),
288 /// The ratio between buffer sizes at which we stop sending initial sync messages vs when we stop
289 /// forwarding gossip messages to peers altogether.
290 const FORWARD_INIT_SYNC_BUFFER_LIMIT_RATIO: usize = 2;
292 /// When the outbound buffer has this many messages, we'll stop reading bytes from the peer until
293 /// we have fewer than this many messages in the outbound buffer again.
294 /// We also use this as the target number of outbound gossip messages to keep in the write buffer,
295 /// refilled as we send bytes.
296 const OUTBOUND_BUFFER_LIMIT_READ_PAUSE: usize = 10;
297 /// When the outbound buffer has this many messages, we'll simply skip relaying gossip messages to
299 const OUTBOUND_BUFFER_LIMIT_DROP_GOSSIP: usize = OUTBOUND_BUFFER_LIMIT_READ_PAUSE * FORWARD_INIT_SYNC_BUFFER_LIMIT_RATIO;
301 /// If we've sent a ping, and are still awaiting a response, we (or our peer) may need to churn our
302 /// (or their) way through the socket receive buffer before receiving the ping.
304 /// On a fairly old Arm64 board, with Linux defaults, this can take as long as 20 seconds, not
305 /// including any network delays or outbound traffic.
307 /// Thus, to avoid needlessly disconnecting a peer, we allow a peer to take this many timer ticks
308 /// to respond to a ping, as long as they send us at least one message during each tick or if we
309 /// sent a lot of messages, ensuring we aren't actually just disconnected. With a timer tick
310 /// interval of five seconds, this translates to about 30 seconds.
311 pub const MAX_BUFFER_DRAIN_TICK_INTERVALS: i8 = 6;
313 /// This is the minimum number of messages we expect a peer to be able to handle within one timer
314 /// tick. Once we have sent this many messages since the last ping, we send a ping right away to
315 /// ensures we don't just fill up our send buffer and leave the peer with too many messages to
316 /// process before the next ping.
317 pub const BUFFER_DRAIN_MSGS_PER_TICK: usize = 32;
320 channel_encryptor: PeerChannelEncryptor,
321 their_node_id: Option<PublicKey>,
322 their_features: Option<InitFeatures>,
324 pending_outbound_buffer: LinkedList<Vec<u8>>,
325 pending_outbound_buffer_first_msg_offset: usize,
326 awaiting_write_event: bool,
328 pending_read_buffer: Vec<u8>,
329 pending_read_buffer_pos: usize,
330 pending_read_is_header: bool,
332 sync_status: InitSyncTracker,
334 msgs_sent_since_pong: usize,
335 awaiting_pong_tick_intervals: i8,
336 received_message_since_timer_tick: bool,
340 /// Returns true if the channel announcements/updates for the given channel should be
341 /// forwarded to this peer.
342 /// If we are sending our routing table to this peer and we have not yet sent channel
343 /// announcements/updates for the given channel_id then we will send it when we get to that
344 /// point and we shouldn't send it yet to avoid sending duplicate updates. If we've already
345 /// sent the old versions, we should send the update, and so return true here.
346 fn should_forward_channel_announcement(&self, channel_id: u64)->bool{
347 match self.sync_status {
348 InitSyncTracker::NoSyncRequested => true,
349 InitSyncTracker::ChannelsSyncing(i) => i < channel_id,
350 InitSyncTracker::NodesSyncing(_) => true,
354 /// Similar to the above, but for node announcements indexed by node_id.
355 fn should_forward_node_announcement(&self, node_id: PublicKey) -> bool {
356 match self.sync_status {
357 InitSyncTracker::NoSyncRequested => true,
358 InitSyncTracker::ChannelsSyncing(_) => false,
359 InitSyncTracker::NodesSyncing(pk) => pk < node_id,
364 struct PeerHolder<Descriptor: SocketDescriptor> {
365 peers: HashMap<Descriptor, Peer>,
366 /// Only add to this set when noise completes:
367 node_id_to_descriptor: HashMap<PublicKey, Descriptor>,
370 #[cfg(not(any(target_pointer_width = "32", target_pointer_width = "64")))]
371 fn _check_usize_is_32_or_64() {
372 // See below, less than 32 bit pointers may be unsafe here!
373 unsafe { mem::transmute::<*const usize, [u8; 4]>(panic!()); }
376 /// SimpleArcPeerManager is useful when you need a PeerManager with a static lifetime, e.g.
377 /// when you're using lightning-net-tokio (since tokio::spawn requires parameters with static
378 /// lifetimes). Other times you can afford a reference, which is more efficient, in which case
379 /// SimpleRefPeerManager is the more appropriate type. Defining these type aliases prevents
380 /// issues such as overly long function definitions.
381 pub type SimpleArcPeerManager<SD, M, T, F, C, L> = PeerManager<SD, Arc<SimpleArcChannelManager<M, T, F, L>>, Arc<NetGraphMsgHandler<Arc<C>, Arc<L>>>, Arc<L>, Arc<IgnoringMessageHandler>>;
383 /// SimpleRefPeerManager is a type alias for a PeerManager reference, and is the reference
384 /// counterpart to the SimpleArcPeerManager type alias. Use this type by default when you don't
385 /// need a PeerManager with a static lifetime. You'll need a static lifetime in cases such as
386 /// usage of lightning-net-tokio (since tokio::spawn requires parameters with static lifetimes).
387 /// But if this is not necessary, using a reference is more efficient. Defining these type aliases
388 /// helps with issues such as long function definitions.
389 pub type SimpleRefPeerManager<'a, 'b, 'c, 'd, 'e, 'f, 'g, SD, M, T, F, C, L> = PeerManager<SD, SimpleRefChannelManager<'a, 'b, 'c, 'd, 'e, M, T, F, L>, &'e NetGraphMsgHandler<&'g C, &'f L>, &'f L, IgnoringMessageHandler>;
391 /// A PeerManager manages a set of peers, described by their [`SocketDescriptor`] and marshalls
392 /// socket events into messages which it passes on to its [`MessageHandler`].
394 /// Locks are taken internally, so you must never assume that reentrancy from a
395 /// [`SocketDescriptor`] call back into [`PeerManager`] methods will not deadlock.
397 /// Calls to [`read_event`] will decode relevant messages and pass them to the
398 /// [`ChannelMessageHandler`], likely doing message processing in-line. Thus, the primary form of
399 /// parallelism in Rust-Lightning is in calls to [`read_event`]. Note, however, that calls to any
400 /// [`PeerManager`] functions related to the same connection must occur only in serial, making new
401 /// calls only after previous ones have returned.
403 /// Rather than using a plain PeerManager, it is preferable to use either a SimpleArcPeerManager
404 /// a SimpleRefPeerManager, for conciseness. See their documentation for more details, but
405 /// essentially you should default to using a SimpleRefPeerManager, and use a
406 /// SimpleArcPeerManager when you require a PeerManager with a static lifetime, such as when
407 /// you're using lightning-net-tokio.
409 /// [`read_event`]: PeerManager::read_event
410 pub struct PeerManager<Descriptor: SocketDescriptor, CM: Deref, RM: Deref, L: Deref, CMH: Deref> where
411 CM::Target: ChannelMessageHandler,
412 RM::Target: RoutingMessageHandler,
414 CMH::Target: CustomMessageHandler {
415 message_handler: MessageHandler<CM, RM>,
416 peers: Mutex<PeerHolder<Descriptor>>,
417 our_node_secret: SecretKey,
418 ephemeral_key_midstate: Sha256Engine,
419 custom_message_handler: CMH,
421 // Usize needs to be at least 32 bits to avoid overflowing both low and high. If usize is 64
422 // bits we will never realistically count into high:
423 peer_counter_low: AtomicUsize,
424 peer_counter_high: AtomicUsize,
429 enum MessageHandlingError {
430 PeerHandleError(PeerHandleError),
431 LightningError(LightningError),
434 impl From<PeerHandleError> for MessageHandlingError {
435 fn from(error: PeerHandleError) -> Self {
436 MessageHandlingError::PeerHandleError(error)
440 impl From<LightningError> for MessageHandlingError {
441 fn from(error: LightningError) -> Self {
442 MessageHandlingError::LightningError(error)
446 macro_rules! encode_msg {
448 let mut buffer = VecWriter(Vec::new());
449 wire::write($msg, &mut buffer).unwrap();
454 impl<Descriptor: SocketDescriptor, CM: Deref, L: Deref> PeerManager<Descriptor, CM, IgnoringMessageHandler, L, IgnoringMessageHandler> where
455 CM::Target: ChannelMessageHandler,
457 /// Constructs a new PeerManager with the given ChannelMessageHandler. No routing message
458 /// handler is used and network graph messages are ignored.
460 /// ephemeral_random_data is used to derive per-connection ephemeral keys and must be
461 /// cryptographically secure random bytes.
463 /// (C-not exported) as we can't export a PeerManager with a dummy route handler
464 pub fn new_channel_only(channel_message_handler: CM, our_node_secret: SecretKey, ephemeral_random_data: &[u8; 32], logger: L) -> Self {
465 Self::new(MessageHandler {
466 chan_handler: channel_message_handler,
467 route_handler: IgnoringMessageHandler{},
468 }, our_node_secret, ephemeral_random_data, logger, IgnoringMessageHandler{})
472 impl<Descriptor: SocketDescriptor, RM: Deref, L: Deref> PeerManager<Descriptor, ErroringMessageHandler, RM, L, IgnoringMessageHandler> where
473 RM::Target: RoutingMessageHandler,
475 /// Constructs a new PeerManager with the given RoutingMessageHandler. No channel message
476 /// handler is used and messages related to channels will be ignored (or generate error
477 /// messages). Note that some other lightning implementations time-out connections after some
478 /// time if no channel is built with the peer.
480 /// ephemeral_random_data is used to derive per-connection ephemeral keys and must be
481 /// cryptographically secure random bytes.
483 /// (C-not exported) as we can't export a PeerManager with a dummy channel handler
484 pub fn new_routing_only(routing_message_handler: RM, our_node_secret: SecretKey, ephemeral_random_data: &[u8; 32], logger: L) -> Self {
485 Self::new(MessageHandler {
486 chan_handler: ErroringMessageHandler::new(),
487 route_handler: routing_message_handler,
488 }, our_node_secret, ephemeral_random_data, logger, IgnoringMessageHandler{})
492 impl<Descriptor: SocketDescriptor, CM: Deref, RM: Deref, L: Deref, CMH: Deref> PeerManager<Descriptor, CM, RM, L, CMH> where
493 CM::Target: ChannelMessageHandler,
494 RM::Target: RoutingMessageHandler,
496 CMH::Target: CustomMessageHandler {
497 /// Constructs a new PeerManager with the given message handlers and node_id secret key
498 /// ephemeral_random_data is used to derive per-connection ephemeral keys and must be
499 /// cryptographically secure random bytes.
500 pub fn new(message_handler: MessageHandler<CM, RM>, our_node_secret: SecretKey, ephemeral_random_data: &[u8; 32], logger: L, custom_message_handler: CMH) -> Self {
501 let mut ephemeral_key_midstate = Sha256::engine();
502 ephemeral_key_midstate.input(ephemeral_random_data);
506 peers: Mutex::new(PeerHolder {
507 peers: HashMap::new(),
508 node_id_to_descriptor: HashMap::new()
511 ephemeral_key_midstate,
512 peer_counter_low: AtomicUsize::new(0),
513 peer_counter_high: AtomicUsize::new(0),
515 custom_message_handler,
519 /// Get the list of node ids for peers which have completed the initial handshake.
521 /// For outbound connections, this will be the same as the their_node_id parameter passed in to
522 /// new_outbound_connection, however entries will only appear once the initial handshake has
523 /// completed and we are sure the remote peer has the private key for the given node_id.
524 pub fn get_peer_node_ids(&self) -> Vec<PublicKey> {
525 let peers = self.peers.lock().unwrap();
526 peers.peers.values().filter_map(|p| {
527 if !p.channel_encryptor.is_ready_for_encryption() || p.their_features.is_none() {
534 fn get_ephemeral_key(&self) -> SecretKey {
535 let mut ephemeral_hash = self.ephemeral_key_midstate.clone();
536 let low = self.peer_counter_low.fetch_add(1, Ordering::AcqRel);
537 let high = if low == 0 {
538 self.peer_counter_high.fetch_add(1, Ordering::AcqRel)
540 self.peer_counter_high.load(Ordering::Acquire)
542 ephemeral_hash.input(&byte_utils::le64_to_array(low as u64));
543 ephemeral_hash.input(&byte_utils::le64_to_array(high as u64));
544 SecretKey::from_slice(&Sha256::from_engine(ephemeral_hash).into_inner()).expect("You broke SHA-256!")
547 /// Indicates a new outbound connection has been established to a node with the given node_id.
548 /// Note that if an Err is returned here you MUST NOT call socket_disconnected for the new
549 /// descriptor but must disconnect the connection immediately.
551 /// Returns a small number of bytes to send to the remote node (currently always 50).
553 /// Panics if descriptor is duplicative with some other descriptor which has not yet been
554 /// [`socket_disconnected()`].
556 /// [`socket_disconnected()`]: PeerManager::socket_disconnected
557 pub fn new_outbound_connection(&self, their_node_id: PublicKey, descriptor: Descriptor) -> Result<Vec<u8>, PeerHandleError> {
558 let mut peer_encryptor = PeerChannelEncryptor::new_outbound(their_node_id.clone(), self.get_ephemeral_key());
559 let res = peer_encryptor.get_act_one().to_vec();
560 let pending_read_buffer = [0; 50].to_vec(); // Noise act two is 50 bytes
562 let mut peers = self.peers.lock().unwrap();
563 if peers.peers.insert(descriptor, Peer {
564 channel_encryptor: peer_encryptor,
566 their_features: None,
568 pending_outbound_buffer: LinkedList::new(),
569 pending_outbound_buffer_first_msg_offset: 0,
570 awaiting_write_event: false,
573 pending_read_buffer_pos: 0,
574 pending_read_is_header: false,
576 sync_status: InitSyncTracker::NoSyncRequested,
578 msgs_sent_since_pong: 0,
579 awaiting_pong_tick_intervals: 0,
580 received_message_since_timer_tick: false,
582 panic!("PeerManager driver duplicated descriptors!");
587 /// Indicates a new inbound connection has been established.
589 /// May refuse the connection by returning an Err, but will never write bytes to the remote end
590 /// (outbound connector always speaks first). Note that if an Err is returned here you MUST NOT
591 /// call socket_disconnected for the new descriptor but must disconnect the connection
594 /// Panics if descriptor is duplicative with some other descriptor which has not yet been
595 /// [`socket_disconnected()`].
597 /// [`socket_disconnected()`]: PeerManager::socket_disconnected
598 pub fn new_inbound_connection(&self, descriptor: Descriptor) -> Result<(), PeerHandleError> {
599 let peer_encryptor = PeerChannelEncryptor::new_inbound(&self.our_node_secret);
600 let pending_read_buffer = [0; 50].to_vec(); // Noise act one is 50 bytes
602 let mut peers = self.peers.lock().unwrap();
603 if peers.peers.insert(descriptor, Peer {
604 channel_encryptor: peer_encryptor,
606 their_features: None,
608 pending_outbound_buffer: LinkedList::new(),
609 pending_outbound_buffer_first_msg_offset: 0,
610 awaiting_write_event: false,
613 pending_read_buffer_pos: 0,
614 pending_read_is_header: false,
616 sync_status: InitSyncTracker::NoSyncRequested,
618 msgs_sent_since_pong: 0,
619 awaiting_pong_tick_intervals: 0,
620 received_message_since_timer_tick: false,
622 panic!("PeerManager driver duplicated descriptors!");
627 fn do_attempt_write_data(&self, descriptor: &mut Descriptor, peer: &mut Peer) {
628 while !peer.awaiting_write_event {
629 if peer.pending_outbound_buffer.len() < OUTBOUND_BUFFER_LIMIT_READ_PAUSE && peer.msgs_sent_since_pong < BUFFER_DRAIN_MSGS_PER_TICK {
630 match peer.sync_status {
631 InitSyncTracker::NoSyncRequested => {},
632 InitSyncTracker::ChannelsSyncing(c) if c < 0xffff_ffff_ffff_ffff => {
633 let steps = ((OUTBOUND_BUFFER_LIMIT_READ_PAUSE - peer.pending_outbound_buffer.len() + 2) / 3) as u8;
634 let all_messages = self.message_handler.route_handler.get_next_channel_announcements(c, steps);
635 for &(ref announce, ref update_a_option, ref update_b_option) in all_messages.iter() {
636 self.enqueue_message(peer, announce);
637 if let &Some(ref update_a) = update_a_option {
638 self.enqueue_message(peer, update_a);
640 if let &Some(ref update_b) = update_b_option {
641 self.enqueue_message(peer, update_b);
643 peer.sync_status = InitSyncTracker::ChannelsSyncing(announce.contents.short_channel_id + 1);
645 if all_messages.is_empty() || all_messages.len() != steps as usize {
646 peer.sync_status = InitSyncTracker::ChannelsSyncing(0xffff_ffff_ffff_ffff);
649 InitSyncTracker::ChannelsSyncing(c) if c == 0xffff_ffff_ffff_ffff => {
650 let steps = (OUTBOUND_BUFFER_LIMIT_READ_PAUSE - peer.pending_outbound_buffer.len()) as u8;
651 let all_messages = self.message_handler.route_handler.get_next_node_announcements(None, steps);
652 for msg in all_messages.iter() {
653 self.enqueue_message(peer, msg);
654 peer.sync_status = InitSyncTracker::NodesSyncing(msg.contents.node_id);
656 if all_messages.is_empty() || all_messages.len() != steps as usize {
657 peer.sync_status = InitSyncTracker::NoSyncRequested;
660 InitSyncTracker::ChannelsSyncing(_) => unreachable!(),
661 InitSyncTracker::NodesSyncing(key) => {
662 let steps = (OUTBOUND_BUFFER_LIMIT_READ_PAUSE - peer.pending_outbound_buffer.len()) as u8;
663 let all_messages = self.message_handler.route_handler.get_next_node_announcements(Some(&key), steps);
664 for msg in all_messages.iter() {
665 self.enqueue_message(peer, msg);
666 peer.sync_status = InitSyncTracker::NodesSyncing(msg.contents.node_id);
668 if all_messages.is_empty() || all_messages.len() != steps as usize {
669 peer.sync_status = InitSyncTracker::NoSyncRequested;
674 if peer.msgs_sent_since_pong >= BUFFER_DRAIN_MSGS_PER_TICK {
675 self.maybe_send_extra_ping(peer);
679 let next_buff = match peer.pending_outbound_buffer.front() {
684 let should_be_reading = peer.pending_outbound_buffer.len() < OUTBOUND_BUFFER_LIMIT_READ_PAUSE;
685 let pending = &next_buff[peer.pending_outbound_buffer_first_msg_offset..];
686 let data_sent = descriptor.send_data(pending, should_be_reading);
687 peer.pending_outbound_buffer_first_msg_offset += data_sent;
688 if peer.pending_outbound_buffer_first_msg_offset == next_buff.len() { true } else { false }
690 peer.pending_outbound_buffer_first_msg_offset = 0;
691 peer.pending_outbound_buffer.pop_front();
693 peer.awaiting_write_event = true;
698 /// Indicates that there is room to write data to the given socket descriptor.
700 /// May return an Err to indicate that the connection should be closed.
702 /// May call [`send_data`] on the descriptor passed in (or an equal descriptor) before
703 /// returning. Thus, be very careful with reentrancy issues! The invariants around calling
704 /// [`write_buffer_space_avail`] in case a write did not fully complete must still hold - be
705 /// ready to call `[write_buffer_space_avail`] again if a write call generated here isn't
708 /// [`send_data`]: SocketDescriptor::send_data
709 /// [`write_buffer_space_avail`]: PeerManager::write_buffer_space_avail
710 pub fn write_buffer_space_avail(&self, descriptor: &mut Descriptor) -> Result<(), PeerHandleError> {
711 let mut peers = self.peers.lock().unwrap();
712 match peers.peers.get_mut(descriptor) {
714 // This is most likely a simple race condition where the user found that the socket
715 // was writeable, then we told the user to `disconnect_socket()`, then they called
716 // this method. Return an error to make sure we get disconnected.
717 return Err(PeerHandleError { no_connection_possible: false });
720 peer.awaiting_write_event = false;
721 self.do_attempt_write_data(descriptor, peer);
727 /// Indicates that data was read from the given socket descriptor.
729 /// May return an Err to indicate that the connection should be closed.
731 /// Will *not* call back into [`send_data`] on any descriptors to avoid reentrancy complexity.
732 /// Thus, however, you should call [`process_events`] after any `read_event` to generate
733 /// [`send_data`] calls to handle responses.
735 /// If `Ok(true)` is returned, further read_events should not be triggered until a
736 /// [`send_data`] call on this descriptor has `resume_read` set (preventing DoS issues in the
739 /// [`send_data`]: SocketDescriptor::send_data
740 /// [`process_events`]: PeerManager::process_events
741 pub fn read_event(&self, peer_descriptor: &mut Descriptor, data: &[u8]) -> Result<bool, PeerHandleError> {
742 match self.do_read_event(peer_descriptor, data) {
745 log_trace!(self.logger, "Peer sent invalid data or we decided to disconnect due to a protocol error");
746 self.disconnect_event_internal(peer_descriptor, e.no_connection_possible);
752 /// Append a message to a peer's pending outbound/write buffer
753 fn enqueue_encoded_message(&self, peer: &mut Peer, encoded_message: &Vec<u8>) {
754 peer.msgs_sent_since_pong += 1;
755 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_message[..]));
758 /// Append a message to a peer's pending outbound/write buffer
759 fn enqueue_message<M: wire::Type>(&self, peer: &mut Peer, message: &M) {
760 let mut buffer = VecWriter(Vec::with_capacity(2048));
761 wire::write(message, &mut buffer).unwrap(); // crash if the write failed
762 log_trace!(self.logger, "Enqueueing message {:?} to {}", message, log_pubkey!(peer.their_node_id.unwrap()));
763 self.enqueue_encoded_message(peer, &buffer.0);
766 fn do_read_event(&self, peer_descriptor: &mut Descriptor, data: &[u8]) -> Result<bool, PeerHandleError> {
768 let mut peers_lock = self.peers.lock().unwrap();
769 let peers = &mut *peers_lock;
770 let mut msgs_to_forward = Vec::new();
771 let mut peer_node_id = None;
772 let pause_read = match peers.peers.get_mut(peer_descriptor) {
774 // This is most likely a simple race condition where the user read some bytes
775 // from the socket, then we told the user to `disconnect_socket()`, then they
776 // called this method. Return an error to make sure we get disconnected.
777 return Err(PeerHandleError { no_connection_possible: false });
780 assert!(peer.pending_read_buffer.len() > 0);
781 assert!(peer.pending_read_buffer.len() > peer.pending_read_buffer_pos);
783 let mut read_pos = 0;
784 while read_pos < data.len() {
786 let data_to_copy = cmp::min(peer.pending_read_buffer.len() - peer.pending_read_buffer_pos, data.len() - read_pos);
787 peer.pending_read_buffer[peer.pending_read_buffer_pos..peer.pending_read_buffer_pos + data_to_copy].copy_from_slice(&data[read_pos..read_pos + data_to_copy]);
788 read_pos += data_to_copy;
789 peer.pending_read_buffer_pos += data_to_copy;
792 if peer.pending_read_buffer_pos == peer.pending_read_buffer.len() {
793 peer.pending_read_buffer_pos = 0;
795 macro_rules! try_potential_handleerror {
801 msgs::ErrorAction::DisconnectPeer { msg: _ } => {
802 //TODO: Try to push msg
803 log_debug!(self.logger, "Error handling message; disconnecting peer with: {}", e.err);
804 return Err(PeerHandleError{ no_connection_possible: false });
806 msgs::ErrorAction::IgnoreAndLog(level) => {
807 log_given_level!(self.logger, level, "Error handling message; ignoring: {}", e.err);
810 msgs::ErrorAction::IgnoreError => {
811 log_debug!(self.logger, "Error handling message; ignoring: {}", e.err);
814 msgs::ErrorAction::SendErrorMessage { msg } => {
815 log_debug!(self.logger, "Error handling message; sending error message with: {}", e.err);
816 self.enqueue_message(peer, &msg);
825 macro_rules! insert_node_id {
827 match peers.node_id_to_descriptor.entry(peer.their_node_id.unwrap()) {
828 hash_map::Entry::Occupied(_) => {
829 log_trace!(self.logger, "Got second connection with {}, closing", log_pubkey!(peer.their_node_id.unwrap()));
830 peer.their_node_id = None; // Unset so that we don't generate a peer_disconnected event
831 return Err(PeerHandleError{ no_connection_possible: false })
833 hash_map::Entry::Vacant(entry) => {
834 log_debug!(self.logger, "Finished noise handshake for connection with {}", log_pubkey!(peer.their_node_id.unwrap()));
835 entry.insert(peer_descriptor.clone())
841 let next_step = peer.channel_encryptor.get_noise_step();
843 NextNoiseStep::ActOne => {
844 let act_two = try_potential_handleerror!(peer.channel_encryptor.process_act_one_with_keys(&peer.pending_read_buffer[..], &self.our_node_secret, self.get_ephemeral_key())).to_vec();
845 peer.pending_outbound_buffer.push_back(act_two);
846 peer.pending_read_buffer = [0; 66].to_vec(); // act three is 66 bytes long
848 NextNoiseStep::ActTwo => {
849 let (act_three, their_node_id) = try_potential_handleerror!(peer.channel_encryptor.process_act_two(&peer.pending_read_buffer[..], &self.our_node_secret));
850 peer.pending_outbound_buffer.push_back(act_three.to_vec());
851 peer.pending_read_buffer = [0; 18].to_vec(); // Message length header is 18 bytes
852 peer.pending_read_is_header = true;
854 peer.their_node_id = Some(their_node_id);
856 let features = InitFeatures::known();
857 let resp = msgs::Init { features };
858 self.enqueue_message(peer, &resp);
860 NextNoiseStep::ActThree => {
861 let their_node_id = try_potential_handleerror!(peer.channel_encryptor.process_act_three(&peer.pending_read_buffer[..]));
862 peer.pending_read_buffer = [0; 18].to_vec(); // Message length header is 18 bytes
863 peer.pending_read_is_header = true;
864 peer.their_node_id = Some(their_node_id);
866 let features = InitFeatures::known();
867 let resp = msgs::Init { features };
868 self.enqueue_message(peer, &resp);
870 NextNoiseStep::NoiseComplete => {
871 if peer.pending_read_is_header {
872 let msg_len = try_potential_handleerror!(peer.channel_encryptor.decrypt_length_header(&peer.pending_read_buffer[..]));
873 peer.pending_read_buffer = Vec::with_capacity(msg_len as usize + 16);
874 peer.pending_read_buffer.resize(msg_len as usize + 16, 0);
875 if msg_len < 2 { // Need at least the message type tag
876 return Err(PeerHandleError{ no_connection_possible: false });
878 peer.pending_read_is_header = false;
880 let msg_data = try_potential_handleerror!(peer.channel_encryptor.decrypt_message(&peer.pending_read_buffer[..]));
881 assert!(msg_data.len() >= 2);
884 peer.pending_read_buffer = [0; 18].to_vec();
885 peer.pending_read_is_header = true;
887 let mut reader = io::Cursor::new(&msg_data[..]);
888 let message_result = wire::read(&mut reader, &*self.custom_message_handler);
889 let message = match message_result {
893 msgs::DecodeError::UnknownVersion => return Err(PeerHandleError { no_connection_possible: false }),
894 msgs::DecodeError::UnknownRequiredFeature => {
895 log_trace!(self.logger, "Got a channel/node announcement with an known required feature flag, you may want to update!");
898 msgs::DecodeError::InvalidValue => {
899 log_debug!(self.logger, "Got an invalid value while deserializing message");
900 return Err(PeerHandleError { no_connection_possible: false });
902 msgs::DecodeError::ShortRead => {
903 log_debug!(self.logger, "Deserialization failed due to shortness of message");
904 return Err(PeerHandleError { no_connection_possible: false });
906 msgs::DecodeError::BadLengthDescriptor => return Err(PeerHandleError { no_connection_possible: false }),
907 msgs::DecodeError::Io(_) => return Err(PeerHandleError { no_connection_possible: false }),
908 msgs::DecodeError::UnsupportedCompression => {
909 log_trace!(self.logger, "We don't support zlib-compressed message fields, ignoring message");
916 match self.handle_message(peer, message) {
917 Err(handling_error) => match handling_error {
918 MessageHandlingError::PeerHandleError(e) => { return Err(e) },
919 MessageHandlingError::LightningError(e) => {
920 try_potential_handleerror!(Err(e));
924 peer_node_id = Some(peer.their_node_id.expect("After noise is complete, their_node_id is always set"));
925 msgs_to_forward.push(msg);
935 peer.pending_outbound_buffer.len() > OUTBOUND_BUFFER_LIMIT_READ_PAUSE // pause_read
939 for msg in msgs_to_forward.drain(..) {
940 self.forward_broadcast_msg(peers, &msg, peer_node_id.as_ref());
949 /// Process an incoming message and return a decision (ok, lightning error, peer handling error) regarding the next action with the peer
950 /// Returns the message back if it needs to be broadcasted to all other peers.
954 message: wire::Message<<<CMH as core::ops::Deref>::Target as wire::CustomMessageReader>::CustomMessage>
955 ) -> Result<Option<wire::Message<<<CMH as core::ops::Deref>::Target as wire::CustomMessageReader>::CustomMessage>>, MessageHandlingError> {
956 log_trace!(self.logger, "Received message {:?} from {}", message, log_pubkey!(peer.their_node_id.unwrap()));
957 peer.received_message_since_timer_tick = true;
959 // Need an Init as first message
960 if let wire::Message::Init(_) = message {
961 } else if peer.their_features.is_none() {
962 log_debug!(self.logger, "Peer {} sent non-Init first message", log_pubkey!(peer.their_node_id.unwrap()));
963 return Err(PeerHandleError{ no_connection_possible: false }.into());
966 let mut should_forward = None;
969 // Setup and Control messages:
970 wire::Message::Init(msg) => {
971 if msg.features.requires_unknown_bits() {
972 log_debug!(self.logger, "Peer features required unknown version bits");
973 return Err(PeerHandleError{ no_connection_possible: true }.into());
975 if peer.their_features.is_some() {
976 return Err(PeerHandleError{ no_connection_possible: false }.into());
979 log_info!(self.logger, "Received peer Init message: {}", msg.features);
981 if msg.features.initial_routing_sync() {
982 peer.sync_status = InitSyncTracker::ChannelsSyncing(0);
984 if !msg.features.supports_static_remote_key() {
985 log_debug!(self.logger, "Peer {} does not support static remote key, disconnecting with no_connection_possible", log_pubkey!(peer.their_node_id.unwrap()));
986 return Err(PeerHandleError{ no_connection_possible: true }.into());
989 self.message_handler.route_handler.sync_routing_table(&peer.their_node_id.unwrap(), &msg);
991 self.message_handler.chan_handler.peer_connected(&peer.their_node_id.unwrap(), &msg);
992 peer.their_features = Some(msg.features);
994 wire::Message::Error(msg) => {
995 let mut data_is_printable = true;
996 for b in msg.data.bytes() {
997 if b < 32 || b > 126 {
998 data_is_printable = false;
1003 if data_is_printable {
1004 log_debug!(self.logger, "Got Err message from {}: {}", log_pubkey!(peer.their_node_id.unwrap()), msg.data);
1006 log_debug!(self.logger, "Got Err message from {} with non-ASCII error message", log_pubkey!(peer.their_node_id.unwrap()));
1008 self.message_handler.chan_handler.handle_error(&peer.their_node_id.unwrap(), &msg);
1009 if msg.channel_id == [0; 32] {
1010 return Err(PeerHandleError{ no_connection_possible: true }.into());
1014 wire::Message::Ping(msg) => {
1015 if msg.ponglen < 65532 {
1016 let resp = msgs::Pong { byteslen: msg.ponglen };
1017 self.enqueue_message(peer, &resp);
1020 wire::Message::Pong(_msg) => {
1021 peer.awaiting_pong_tick_intervals = 0;
1022 peer.msgs_sent_since_pong = 0;
1025 // Channel messages:
1026 wire::Message::OpenChannel(msg) => {
1027 self.message_handler.chan_handler.handle_open_channel(&peer.their_node_id.unwrap(), peer.their_features.clone().unwrap(), &msg);
1029 wire::Message::AcceptChannel(msg) => {
1030 self.message_handler.chan_handler.handle_accept_channel(&peer.their_node_id.unwrap(), peer.their_features.clone().unwrap(), &msg);
1033 wire::Message::FundingCreated(msg) => {
1034 self.message_handler.chan_handler.handle_funding_created(&peer.their_node_id.unwrap(), &msg);
1036 wire::Message::FundingSigned(msg) => {
1037 self.message_handler.chan_handler.handle_funding_signed(&peer.their_node_id.unwrap(), &msg);
1039 wire::Message::FundingLocked(msg) => {
1040 self.message_handler.chan_handler.handle_funding_locked(&peer.their_node_id.unwrap(), &msg);
1043 wire::Message::Shutdown(msg) => {
1044 self.message_handler.chan_handler.handle_shutdown(&peer.their_node_id.unwrap(), peer.their_features.as_ref().unwrap(), &msg);
1046 wire::Message::ClosingSigned(msg) => {
1047 self.message_handler.chan_handler.handle_closing_signed(&peer.their_node_id.unwrap(), &msg);
1050 // Commitment messages:
1051 wire::Message::UpdateAddHTLC(msg) => {
1052 self.message_handler.chan_handler.handle_update_add_htlc(&peer.their_node_id.unwrap(), &msg);
1054 wire::Message::UpdateFulfillHTLC(msg) => {
1055 self.message_handler.chan_handler.handle_update_fulfill_htlc(&peer.their_node_id.unwrap(), &msg);
1057 wire::Message::UpdateFailHTLC(msg) => {
1058 self.message_handler.chan_handler.handle_update_fail_htlc(&peer.their_node_id.unwrap(), &msg);
1060 wire::Message::UpdateFailMalformedHTLC(msg) => {
1061 self.message_handler.chan_handler.handle_update_fail_malformed_htlc(&peer.their_node_id.unwrap(), &msg);
1064 wire::Message::CommitmentSigned(msg) => {
1065 self.message_handler.chan_handler.handle_commitment_signed(&peer.their_node_id.unwrap(), &msg);
1067 wire::Message::RevokeAndACK(msg) => {
1068 self.message_handler.chan_handler.handle_revoke_and_ack(&peer.their_node_id.unwrap(), &msg);
1070 wire::Message::UpdateFee(msg) => {
1071 self.message_handler.chan_handler.handle_update_fee(&peer.their_node_id.unwrap(), &msg);
1073 wire::Message::ChannelReestablish(msg) => {
1074 self.message_handler.chan_handler.handle_channel_reestablish(&peer.their_node_id.unwrap(), &msg);
1077 // Routing messages:
1078 wire::Message::AnnouncementSignatures(msg) => {
1079 self.message_handler.chan_handler.handle_announcement_signatures(&peer.their_node_id.unwrap(), &msg);
1081 wire::Message::ChannelAnnouncement(msg) => {
1082 if self.message_handler.route_handler.handle_channel_announcement(&msg)
1083 .map_err(|e| -> MessageHandlingError { e.into() })? {
1084 should_forward = Some(wire::Message::ChannelAnnouncement(msg));
1087 wire::Message::NodeAnnouncement(msg) => {
1088 if self.message_handler.route_handler.handle_node_announcement(&msg)
1089 .map_err(|e| -> MessageHandlingError { e.into() })? {
1090 should_forward = Some(wire::Message::NodeAnnouncement(msg));
1093 wire::Message::ChannelUpdate(msg) => {
1094 self.message_handler.chan_handler.handle_channel_update(&peer.their_node_id.unwrap(), &msg);
1095 if self.message_handler.route_handler.handle_channel_update(&msg)
1096 .map_err(|e| -> MessageHandlingError { e.into() })? {
1097 should_forward = Some(wire::Message::ChannelUpdate(msg));
1100 wire::Message::QueryShortChannelIds(msg) => {
1101 self.message_handler.route_handler.handle_query_short_channel_ids(&peer.their_node_id.unwrap(), msg)?;
1103 wire::Message::ReplyShortChannelIdsEnd(msg) => {
1104 self.message_handler.route_handler.handle_reply_short_channel_ids_end(&peer.their_node_id.unwrap(), msg)?;
1106 wire::Message::QueryChannelRange(msg) => {
1107 self.message_handler.route_handler.handle_query_channel_range(&peer.their_node_id.unwrap(), msg)?;
1109 wire::Message::ReplyChannelRange(msg) => {
1110 self.message_handler.route_handler.handle_reply_channel_range(&peer.their_node_id.unwrap(), msg)?;
1112 wire::Message::GossipTimestampFilter(_msg) => {
1113 // TODO: handle message
1116 // Unknown messages:
1117 wire::Message::Unknown(type_id) if message.is_even() => {
1118 log_debug!(self.logger, "Received unknown even message of type {}, disconnecting peer!", type_id);
1119 // Fail the channel if message is an even, unknown type as per BOLT #1.
1120 return Err(PeerHandleError{ no_connection_possible: true }.into());
1122 wire::Message::Unknown(type_id) => {
1123 log_trace!(self.logger, "Received unknown odd message of type {}, ignoring", type_id);
1125 wire::Message::Custom(custom) => {
1126 self.custom_message_handler.handle_custom_message(custom, &peer.their_node_id.unwrap())?;
1132 fn forward_broadcast_msg(&self, peers: &mut PeerHolder<Descriptor>, msg: &wire::Message<<<CMH as core::ops::Deref>::Target as wire::CustomMessageReader>::CustomMessage>, except_node: Option<&PublicKey>) {
1134 wire::Message::ChannelAnnouncement(ref msg) => {
1135 log_trace!(self.logger, "Sending message to all peers except {:?} or the announced channel's counterparties: {:?}", except_node, msg);
1136 let encoded_msg = encode_msg!(msg);
1138 for (_, peer) in peers.peers.iter_mut() {
1139 if !peer.channel_encryptor.is_ready_for_encryption() || peer.their_features.is_none() ||
1140 !peer.should_forward_channel_announcement(msg.contents.short_channel_id) {
1143 if peer.pending_outbound_buffer.len() > OUTBOUND_BUFFER_LIMIT_DROP_GOSSIP
1144 || peer.msgs_sent_since_pong > BUFFER_DRAIN_MSGS_PER_TICK * FORWARD_INIT_SYNC_BUFFER_SIZE_LIMIT
1146 log_trace!(self.logger, "Skipping broadcast message to {:?} as its outbound buffer is full", peer.their_node_id);
1149 if peer.their_node_id.as_ref() == Some(&msg.contents.node_id_1) ||
1150 peer.their_node_id.as_ref() == Some(&msg.contents.node_id_2) {
1153 if except_node.is_some() && peer.their_node_id.as_ref() == except_node {
1156 self.enqueue_encoded_message(peer, &encoded_msg);
1159 wire::Message::NodeAnnouncement(ref msg) => {
1160 log_trace!(self.logger, "Sending message to all peers except {:?} or the announced node: {:?}", except_node, msg);
1161 let encoded_msg = encode_msg!(msg);
1163 for (_, peer) in peers.peers.iter_mut() {
1164 if !peer.channel_encryptor.is_ready_for_encryption() || peer.their_features.is_none() ||
1165 !peer.should_forward_node_announcement(msg.contents.node_id) {
1168 if peer.pending_outbound_buffer.len() > OUTBOUND_BUFFER_LIMIT_DROP_GOSSIP
1169 || peer.msgs_sent_since_pong > BUFFER_DRAIN_MSGS_PER_TICK * FORWARD_INIT_SYNC_BUFFER_SIZE_LIMIT
1171 log_trace!(self.logger, "Skipping broadcast message to {:?} as its outbound buffer is full", peer.their_node_id);
1174 if peer.their_node_id.as_ref() == Some(&msg.contents.node_id) {
1177 if except_node.is_some() && peer.their_node_id.as_ref() == except_node {
1180 self.enqueue_encoded_message(peer, &encoded_msg);
1183 wire::Message::ChannelUpdate(ref msg) => {
1184 log_trace!(self.logger, "Sending message to all peers except {:?}: {:?}", except_node, msg);
1185 let encoded_msg = encode_msg!(msg);
1187 for (_, peer) in peers.peers.iter_mut() {
1188 if !peer.channel_encryptor.is_ready_for_encryption() || peer.their_features.is_none() ||
1189 !peer.should_forward_channel_announcement(msg.contents.short_channel_id) {
1192 if peer.pending_outbound_buffer.len() > OUTBOUND_BUFFER_LIMIT_DROP_GOSSIP
1193 || peer.msgs_sent_since_pong > BUFFER_DRAIN_MSGS_PER_TICK * FORWARD_INIT_SYNC_BUFFER_SIZE_LIMIT
1195 log_trace!(self.logger, "Skipping broadcast message to {:?} as its outbound buffer is full", peer.their_node_id);
1198 if except_node.is_some() && peer.their_node_id.as_ref() == except_node {
1201 self.enqueue_encoded_message(peer, &encoded_msg);
1204 _ => debug_assert!(false, "We shouldn't attempt to forward anything but gossip messages"),
1208 /// Checks for any events generated by our handlers and processes them. Includes sending most
1209 /// response messages as well as messages generated by calls to handler functions directly (eg
1210 /// functions like [`ChannelManager::process_pending_htlc_forwards`] or [`send_payment`]).
1212 /// May call [`send_data`] on [`SocketDescriptor`]s. Thus, be very careful with reentrancy
1215 /// You don't have to call this function explicitly if you are using [`lightning-net-tokio`]
1216 /// or one of the other clients provided in our language bindings.
1218 /// [`send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
1219 /// [`ChannelManager::process_pending_htlc_forwards`]: crate::ln::channelmanager::ChannelManager::process_pending_htlc_forwards
1220 /// [`send_data`]: SocketDescriptor::send_data
1221 pub fn process_events(&self) {
1223 // TODO: There are some DoS attacks here where you can flood someone's outbound send
1224 // buffer by doing things like announcing channels on another node. We should be willing to
1225 // drop optional-ish messages when send buffers get full!
1227 let mut peers_lock = self.peers.lock().unwrap();
1228 let mut events_generated = self.message_handler.chan_handler.get_and_clear_pending_msg_events();
1229 events_generated.append(&mut self.message_handler.route_handler.get_and_clear_pending_msg_events());
1230 let peers = &mut *peers_lock;
1231 macro_rules! get_peer_for_forwarding {
1232 ($node_id: expr) => {
1234 match peers.node_id_to_descriptor.get($node_id) {
1235 Some(descriptor) => match peers.peers.get_mut(&descriptor) {
1237 if peer.their_features.is_none() {
1242 None => panic!("Inconsistent peers set state!"),
1251 for event in events_generated.drain(..) {
1253 MessageSendEvent::SendAcceptChannel { ref node_id, ref msg } => {
1254 log_debug!(self.logger, "Handling SendAcceptChannel event in peer_handler for node {} for channel {}",
1255 log_pubkey!(node_id),
1256 log_bytes!(msg.temporary_channel_id));
1257 self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
1259 MessageSendEvent::SendOpenChannel { ref node_id, ref msg } => {
1260 log_debug!(self.logger, "Handling SendOpenChannel event in peer_handler for node {} for channel {}",
1261 log_pubkey!(node_id),
1262 log_bytes!(msg.temporary_channel_id));
1263 self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
1265 MessageSendEvent::SendFundingCreated { ref node_id, ref msg } => {
1266 log_debug!(self.logger, "Handling SendFundingCreated event in peer_handler for node {} for channel {} (which becomes {})",
1267 log_pubkey!(node_id),
1268 log_bytes!(msg.temporary_channel_id),
1269 log_funding_channel_id!(msg.funding_txid, msg.funding_output_index));
1270 // TODO: If the peer is gone we should generate a DiscardFunding event
1271 // indicating to the wallet that they should just throw away this funding transaction
1272 self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
1274 MessageSendEvent::SendFundingSigned { ref node_id, ref msg } => {
1275 log_debug!(self.logger, "Handling SendFundingSigned event in peer_handler for node {} for channel {}",
1276 log_pubkey!(node_id),
1277 log_bytes!(msg.channel_id));
1278 self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
1280 MessageSendEvent::SendFundingLocked { ref node_id, ref msg } => {
1281 log_debug!(self.logger, "Handling SendFundingLocked event in peer_handler for node {} for channel {}",
1282 log_pubkey!(node_id),
1283 log_bytes!(msg.channel_id));
1284 self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
1286 MessageSendEvent::SendAnnouncementSignatures { ref node_id, ref msg } => {
1287 log_debug!(self.logger, "Handling SendAnnouncementSignatures event in peer_handler for node {} for channel {})",
1288 log_pubkey!(node_id),
1289 log_bytes!(msg.channel_id));
1290 self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
1292 MessageSendEvent::UpdateHTLCs { ref node_id, updates: msgs::CommitmentUpdate { ref update_add_htlcs, ref update_fulfill_htlcs, ref update_fail_htlcs, ref update_fail_malformed_htlcs, ref update_fee, ref commitment_signed } } => {
1293 log_debug!(self.logger, "Handling UpdateHTLCs event in peer_handler for node {} with {} adds, {} fulfills, {} fails for channel {}",
1294 log_pubkey!(node_id),
1295 update_add_htlcs.len(),
1296 update_fulfill_htlcs.len(),
1297 update_fail_htlcs.len(),
1298 log_bytes!(commitment_signed.channel_id));
1299 let peer = get_peer_for_forwarding!(node_id);
1300 for msg in update_add_htlcs {
1301 self.enqueue_message(peer, msg);
1303 for msg in update_fulfill_htlcs {
1304 self.enqueue_message(peer, msg);
1306 for msg in update_fail_htlcs {
1307 self.enqueue_message(peer, msg);
1309 for msg in update_fail_malformed_htlcs {
1310 self.enqueue_message(peer, msg);
1312 if let &Some(ref msg) = update_fee {
1313 self.enqueue_message(peer, msg);
1315 self.enqueue_message(peer, commitment_signed);
1317 MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
1318 log_debug!(self.logger, "Handling SendRevokeAndACK event in peer_handler for node {} for channel {}",
1319 log_pubkey!(node_id),
1320 log_bytes!(msg.channel_id));
1321 self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
1323 MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
1324 log_debug!(self.logger, "Handling SendClosingSigned event in peer_handler for node {} for channel {}",
1325 log_pubkey!(node_id),
1326 log_bytes!(msg.channel_id));
1327 self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
1329 MessageSendEvent::SendShutdown { ref node_id, ref msg } => {
1330 log_debug!(self.logger, "Handling Shutdown event in peer_handler for node {} for channel {}",
1331 log_pubkey!(node_id),
1332 log_bytes!(msg.channel_id));
1333 self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
1335 MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
1336 log_debug!(self.logger, "Handling SendChannelReestablish event in peer_handler for node {} for channel {}",
1337 log_pubkey!(node_id),
1338 log_bytes!(msg.channel_id));
1339 self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
1341 MessageSendEvent::BroadcastChannelAnnouncement { msg, update_msg } => {
1342 log_debug!(self.logger, "Handling BroadcastChannelAnnouncement event in peer_handler for short channel id {}", msg.contents.short_channel_id);
1343 if self.message_handler.route_handler.handle_channel_announcement(&msg).is_ok() && self.message_handler.route_handler.handle_channel_update(&update_msg).is_ok() {
1344 self.forward_broadcast_msg(peers, &wire::Message::ChannelAnnouncement(msg), None);
1345 self.forward_broadcast_msg(peers, &wire::Message::ChannelUpdate(update_msg), None);
1348 MessageSendEvent::BroadcastNodeAnnouncement { msg } => {
1349 log_debug!(self.logger, "Handling BroadcastNodeAnnouncement event in peer_handler");
1350 if self.message_handler.route_handler.handle_node_announcement(&msg).is_ok() {
1351 self.forward_broadcast_msg(peers, &wire::Message::NodeAnnouncement(msg), None);
1354 MessageSendEvent::BroadcastChannelUpdate { msg } => {
1355 log_debug!(self.logger, "Handling BroadcastChannelUpdate event in peer_handler for short channel id {}", msg.contents.short_channel_id);
1356 if self.message_handler.route_handler.handle_channel_update(&msg).is_ok() {
1357 self.forward_broadcast_msg(peers, &wire::Message::ChannelUpdate(msg), None);
1360 MessageSendEvent::SendChannelUpdate { ref node_id, ref msg } => {
1361 log_trace!(self.logger, "Handling SendChannelUpdate event in peer_handler for node {} for channel {}",
1362 log_pubkey!(node_id), msg.contents.short_channel_id);
1363 let peer = get_peer_for_forwarding!(node_id);
1364 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg)));
1366 MessageSendEvent::HandleError { ref node_id, ref action } => {
1368 msgs::ErrorAction::DisconnectPeer { ref msg } => {
1369 if let Some(mut descriptor) = peers.node_id_to_descriptor.remove(node_id) {
1370 if let Some(mut peer) = peers.peers.remove(&descriptor) {
1371 if let Some(ref msg) = *msg {
1372 log_trace!(self.logger, "Handling DisconnectPeer HandleError event in peer_handler for node {} with message {}",
1373 log_pubkey!(node_id),
1375 self.enqueue_message(&mut peer, msg);
1376 // This isn't guaranteed to work, but if there is enough free
1377 // room in the send buffer, put the error message there...
1378 self.do_attempt_write_data(&mut descriptor, &mut peer);
1380 log_trace!(self.logger, "Handling DisconnectPeer HandleError event in peer_handler for node {} with no message", log_pubkey!(node_id));
1383 descriptor.disconnect_socket();
1384 self.message_handler.chan_handler.peer_disconnected(&node_id, false);
1387 msgs::ErrorAction::IgnoreAndLog(level) => {
1388 log_given_level!(self.logger, level, "Received a HandleError event to be ignored for node {}", log_pubkey!(node_id));
1390 msgs::ErrorAction::IgnoreError => {
1391 log_debug!(self.logger, "Received a HandleError event to be ignored for node {}", log_pubkey!(node_id));
1393 msgs::ErrorAction::SendErrorMessage { ref msg } => {
1394 log_trace!(self.logger, "Handling SendErrorMessage HandleError event in peer_handler for node {} with message {}",
1395 log_pubkey!(node_id),
1397 self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
1401 MessageSendEvent::SendChannelRangeQuery { ref node_id, ref msg } => {
1402 self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
1404 MessageSendEvent::SendShortIdsQuery { ref node_id, ref msg } => {
1405 self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
1407 MessageSendEvent::SendReplyChannelRange { ref node_id, ref msg } => {
1408 log_trace!(self.logger, "Handling SendReplyChannelRange event in peer_handler for node {} with num_scids={} first_blocknum={} number_of_blocks={}, sync_complete={}",
1409 log_pubkey!(node_id),
1410 msg.short_channel_ids.len(),
1412 msg.number_of_blocks,
1414 self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
1419 for (node_id, msg) in self.custom_message_handler.get_and_clear_pending_msg() {
1420 self.enqueue_message(get_peer_for_forwarding!(&node_id), &msg);
1423 for (descriptor, peer) in peers.peers.iter_mut() {
1424 self.do_attempt_write_data(&mut (*descriptor).clone(), peer);
1429 /// Indicates that the given socket descriptor's connection is now closed.
1430 pub fn socket_disconnected(&self, descriptor: &Descriptor) {
1431 self.disconnect_event_internal(descriptor, false);
1434 fn disconnect_event_internal(&self, descriptor: &Descriptor, no_connection_possible: bool) {
1435 let mut peers = self.peers.lock().unwrap();
1436 let peer_option = peers.peers.remove(descriptor);
1439 // This is most likely a simple race condition where the user found that the socket
1440 // was disconnected, then we told the user to `disconnect_socket()`, then they
1441 // called this method. Either way we're disconnected, return.
1444 match peer.their_node_id {
1446 log_trace!(self.logger,
1447 "Handling disconnection of peer {}, with {}future connection to the peer possible.",
1448 log_pubkey!(node_id), if no_connection_possible { "no " } else { "" });
1449 peers.node_id_to_descriptor.remove(&node_id);
1450 self.message_handler.chan_handler.peer_disconnected(&node_id, no_connection_possible);
1458 /// Disconnect a peer given its node id.
1460 /// Set `no_connection_possible` to true to prevent any further connection with this peer,
1461 /// force-closing any channels we have with it.
1463 /// If a peer is connected, this will call [`disconnect_socket`] on the descriptor for the
1464 /// peer. Thus, be very careful about reentrancy issues.
1466 /// [`disconnect_socket`]: SocketDescriptor::disconnect_socket
1467 pub fn disconnect_by_node_id(&self, node_id: PublicKey, no_connection_possible: bool) {
1468 let mut peers_lock = self.peers.lock().unwrap();
1469 if let Some(mut descriptor) = peers_lock.node_id_to_descriptor.remove(&node_id) {
1470 log_trace!(self.logger, "Disconnecting peer with id {} due to client request", node_id);
1471 peers_lock.peers.remove(&descriptor);
1472 self.message_handler.chan_handler.peer_disconnected(&node_id, no_connection_possible);
1473 descriptor.disconnect_socket();
1477 /// Disconnects all currently-connected peers. This is useful on platforms where there may be
1478 /// an indication that TCP sockets have stalled even if we weren't around to time them out
1479 /// using regular ping/pongs.
1480 pub fn disconnect_all_peers(&self) {
1481 let mut peers_lock = self.peers.lock().unwrap();
1482 let peers = &mut *peers_lock;
1483 for (mut descriptor, peer) in peers.peers.drain() {
1484 if let Some(node_id) = peer.their_node_id {
1485 log_trace!(self.logger, "Disconnecting peer with id {} due to client request to disconnect all peers", node_id);
1486 peers.node_id_to_descriptor.remove(&node_id);
1487 self.message_handler.chan_handler.peer_disconnected(&node_id, false);
1489 descriptor.disconnect_socket();
1491 debug_assert!(peers.node_id_to_descriptor.is_empty());
1494 /// This is called when we're blocked on sending additional gossip messages until we receive a
1495 /// pong. If we aren't waiting on a pong, we take this opportunity to send a ping (setting
1496 /// `awaiting_pong_tick_intervals` to a special flag value to indicate this).
1497 fn maybe_send_extra_ping(&self, peer: &mut Peer) {
1498 if peer.awaiting_pong_tick_intervals == 0 {
1499 peer.awaiting_pong_tick_intervals = -1;
1500 let ping = msgs::Ping {
1504 self.enqueue_message(peer, &ping);
1508 /// Send pings to each peer and disconnect those which did not respond to the last round of
1511 /// This may be called on any timescale you want, however, roughly once every five to ten
1512 /// seconds is preferred. The call rate determines both how often we send a ping to our peers
1513 /// and how much time they have to respond before we disconnect them.
1515 /// May call [`send_data`] on all [`SocketDescriptor`]s. Thus, be very careful with reentrancy
1518 /// [`send_data`]: SocketDescriptor::send_data
1519 pub fn timer_tick_occurred(&self) {
1520 let mut peers_lock = self.peers.lock().unwrap();
1522 let peers = &mut *peers_lock;
1523 let node_id_to_descriptor = &mut peers.node_id_to_descriptor;
1524 let peers = &mut peers.peers;
1525 let mut descriptors_needing_disconnect = Vec::new();
1527 peers.retain(|descriptor, peer| {
1528 if !peer.channel_encryptor.is_ready_for_encryption() {
1529 // The peer needs to complete its handshake before we can exchange messages
1533 if (peer.awaiting_pong_tick_intervals > 0 && !peer.received_message_since_timer_tick)
1534 || peer.awaiting_pong_tick_intervals > MAX_BUFFER_DRAIN_TICK_INTERVALS
1536 descriptors_needing_disconnect.push(descriptor.clone());
1537 match peer.their_node_id {
1539 log_trace!(self.logger, "Disconnecting peer with id {} due to ping timeout", node_id);
1540 node_id_to_descriptor.remove(&node_id);
1541 self.message_handler.chan_handler.peer_disconnected(&node_id, false);
1544 // This can't actually happen as we should have hit
1545 // is_ready_for_encryption() previously on this same peer.
1552 peer.received_message_since_timer_tick = false;
1553 if peer.awaiting_pong_tick_intervals == -1 {
1554 // Magic value set in `maybe_send_extra_ping`.
1555 peer.awaiting_pong_tick_intervals = 1;
1559 if peer.awaiting_pong_tick_intervals > 0 {
1560 peer.awaiting_pong_tick_intervals += 1;
1564 peer.awaiting_pong_tick_intervals = 1;
1565 let ping = msgs::Ping {
1569 self.enqueue_message(peer, &ping);
1570 self.do_attempt_write_data(&mut (descriptor.clone()), &mut *peer);
1575 for mut descriptor in descriptors_needing_disconnect.drain(..) {
1576 descriptor.disconnect_socket();
1584 use ln::peer_handler::{PeerManager, MessageHandler, SocketDescriptor, IgnoringMessageHandler};
1587 use util::test_utils;
1589 use bitcoin::secp256k1::Secp256k1;
1590 use bitcoin::secp256k1::key::{SecretKey, PublicKey};
1593 use sync::{Arc, Mutex};
1594 use core::sync::atomic::Ordering;
1597 struct FileDescriptor {
1599 outbound_data: Arc<Mutex<Vec<u8>>>,
1601 impl PartialEq for FileDescriptor {
1602 fn eq(&self, other: &Self) -> bool {
1606 impl Eq for FileDescriptor { }
1607 impl core::hash::Hash for FileDescriptor {
1608 fn hash<H: core::hash::Hasher>(&self, hasher: &mut H) {
1609 self.fd.hash(hasher)
1613 impl SocketDescriptor for FileDescriptor {
1614 fn send_data(&mut self, data: &[u8], _resume_read: bool) -> usize {
1615 self.outbound_data.lock().unwrap().extend_from_slice(data);
1619 fn disconnect_socket(&mut self) {}
1622 struct PeerManagerCfg {
1623 chan_handler: test_utils::TestChannelMessageHandler,
1624 routing_handler: test_utils::TestRoutingMessageHandler,
1625 logger: test_utils::TestLogger,
1628 fn create_peermgr_cfgs(peer_count: usize) -> Vec<PeerManagerCfg> {
1629 let mut cfgs = Vec::new();
1630 for _ in 0..peer_count {
1633 chan_handler: test_utils::TestChannelMessageHandler::new(),
1634 logger: test_utils::TestLogger::new(),
1635 routing_handler: test_utils::TestRoutingMessageHandler::new(),
1643 fn create_network<'a>(peer_count: usize, cfgs: &'a Vec<PeerManagerCfg>) -> Vec<PeerManager<FileDescriptor, &'a test_utils::TestChannelMessageHandler, &'a test_utils::TestRoutingMessageHandler, &'a test_utils::TestLogger, IgnoringMessageHandler>> {
1644 let mut peers = Vec::new();
1645 for i in 0..peer_count {
1646 let node_secret = SecretKey::from_slice(&[42 + i as u8; 32]).unwrap();
1647 let ephemeral_bytes = [i as u8; 32];
1648 let msg_handler = MessageHandler { chan_handler: &cfgs[i].chan_handler, route_handler: &cfgs[i].routing_handler };
1649 let peer = PeerManager::new(msg_handler, node_secret, &ephemeral_bytes, &cfgs[i].logger, IgnoringMessageHandler {});
1656 fn establish_connection<'a>(peer_a: &PeerManager<FileDescriptor, &'a test_utils::TestChannelMessageHandler, &'a test_utils::TestRoutingMessageHandler, &'a test_utils::TestLogger, IgnoringMessageHandler>, peer_b: &PeerManager<FileDescriptor, &'a test_utils::TestChannelMessageHandler, &'a test_utils::TestRoutingMessageHandler, &'a test_utils::TestLogger, IgnoringMessageHandler>) -> (FileDescriptor, FileDescriptor) {
1657 let secp_ctx = Secp256k1::new();
1658 let a_id = PublicKey::from_secret_key(&secp_ctx, &peer_a.our_node_secret);
1659 let mut fd_a = FileDescriptor { fd: 1, outbound_data: Arc::new(Mutex::new(Vec::new())) };
1660 let mut fd_b = FileDescriptor { fd: 1, outbound_data: Arc::new(Mutex::new(Vec::new())) };
1661 let initial_data = peer_b.new_outbound_connection(a_id, fd_b.clone()).unwrap();
1662 peer_a.new_inbound_connection(fd_a.clone()).unwrap();
1663 assert_eq!(peer_a.read_event(&mut fd_a, &initial_data).unwrap(), false);
1664 peer_a.process_events();
1665 assert_eq!(peer_b.read_event(&mut fd_b, &fd_a.outbound_data.lock().unwrap().split_off(0)).unwrap(), false);
1666 peer_b.process_events();
1667 assert_eq!(peer_a.read_event(&mut fd_a, &fd_b.outbound_data.lock().unwrap().split_off(0)).unwrap(), false);
1668 (fd_a.clone(), fd_b.clone())
1672 fn test_disconnect_peer() {
1673 // Simple test which builds a network of PeerManager, connects and brings them to NoiseState::Finished and
1674 // push a DisconnectPeer event to remove the node flagged by id
1675 let cfgs = create_peermgr_cfgs(2);
1676 let chan_handler = test_utils::TestChannelMessageHandler::new();
1677 let mut peers = create_network(2, &cfgs);
1678 establish_connection(&peers[0], &peers[1]);
1679 assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1);
1681 let secp_ctx = Secp256k1::new();
1682 let their_id = PublicKey::from_secret_key(&secp_ctx, &peers[1].our_node_secret);
1684 chan_handler.pending_events.lock().unwrap().push(events::MessageSendEvent::HandleError {
1686 action: msgs::ErrorAction::DisconnectPeer { msg: None },
1688 assert_eq!(chan_handler.pending_events.lock().unwrap().len(), 1);
1689 peers[0].message_handler.chan_handler = &chan_handler;
1691 peers[0].process_events();
1692 assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 0);
1696 fn test_timer_tick_occurred() {
1697 // Create peers, a vector of two peer managers, perform initial set up and check that peers[0] has one Peer.
1698 let cfgs = create_peermgr_cfgs(2);
1699 let peers = create_network(2, &cfgs);
1700 establish_connection(&peers[0], &peers[1]);
1701 assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1);
1703 // peers[0] awaiting_pong is set to true, but the Peer is still connected
1704 peers[0].timer_tick_occurred();
1705 peers[0].process_events();
1706 assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1);
1708 // Since timer_tick_occurred() is called again when awaiting_pong is true, all Peers are disconnected
1709 peers[0].timer_tick_occurred();
1710 peers[0].process_events();
1711 assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 0);
1715 fn test_do_attempt_write_data() {
1716 // Create 2 peers with custom TestRoutingMessageHandlers and connect them.
1717 let cfgs = create_peermgr_cfgs(2);
1718 cfgs[0].routing_handler.request_full_sync.store(true, Ordering::Release);
1719 cfgs[1].routing_handler.request_full_sync.store(true, Ordering::Release);
1720 let peers = create_network(2, &cfgs);
1722 // By calling establish_connect, we trigger do_attempt_write_data between
1723 // the peers. Previously this function would mistakenly enter an infinite loop
1724 // when there were more channel messages available than could fit into a peer's
1725 // buffer. This issue would now be detected by this test (because we use custom
1726 // RoutingMessageHandlers that intentionally return more channel messages
1727 // than can fit into a peer's buffer).
1728 let (mut fd_a, mut fd_b) = establish_connection(&peers[0], &peers[1]);
1730 // Make each peer to read the messages that the other peer just wrote to them. Note that
1731 // due to the max-messagse-before-bing limits this may take a few iterations to complete.
1733 peers[0].process_events();
1734 peers[1].read_event(&mut fd_b, &fd_a.outbound_data.lock().unwrap().split_off(0)).unwrap();
1735 peers[1].process_events();
1736 peers[0].read_event(&mut fd_a, &fd_b.outbound_data.lock().unwrap().split_off(0)).unwrap();
1739 // Check that each peer has received the expected number of channel updates and channel
1741 assert_eq!(cfgs[0].routing_handler.chan_upds_recvd.load(Ordering::Acquire), 100);
1742 assert_eq!(cfgs[0].routing_handler.chan_anns_recvd.load(Ordering::Acquire), 50);
1743 assert_eq!(cfgs[1].routing_handler.chan_upds_recvd.load(Ordering::Acquire), 100);
1744 assert_eq!(cfgs[1].routing_handler.chan_anns_recvd.load(Ordering::Acquire), 50);