1 //! Top level peer message handling and socket handling logic lives here.
3 //! Instead of actually servicing sockets ourselves we require that you implement the
4 //! SocketDescriptor interface and use that to receive actions which you should perform on the
5 //! socket, and call into PeerManager with bytes read from the socket. The PeerManager will then
6 //! call into the provided message handlers (probably a ChannelManager and Router) with messages
7 //! they should handle, and encoding/sending response messages.
9 use secp256k1::key::{SecretKey,PublicKey};
11 use ln::features::InitFeatures;
13 use ln::msgs::ChannelMessageHandler;
14 use ln::channelmanager::{SimpleArcChannelManager, SimpleRefChannelManager};
15 use util::ser::{Writeable, Writer, Readable};
16 use ln::peer_channel_encryptor::{PeerChannelEncryptor,NextNoiseStep};
18 use util::events::{MessageSendEvent, MessageSendEventsProvider};
19 use util::logger::Logger;
21 use std::collections::{HashMap,hash_map,HashSet,LinkedList};
22 use std::sync::{Arc, Mutex};
23 use std::sync::atomic::{AtomicUsize, Ordering};
24 use std::{cmp,error,hash,fmt};
27 use bitcoin_hashes::sha256::Hash as Sha256;
28 use bitcoin_hashes::sha256::HashEngine as Sha256Engine;
29 use bitcoin_hashes::{HashEngine, Hash};
31 /// Provides references to trait impls which handle different types of messages.
32 pub struct MessageHandler<CM: Deref> where CM::Target: msgs::ChannelMessageHandler {
33 /// A message handler which handles messages specific to channels. Usually this is just a
34 /// ChannelManager object.
36 /// A message handler which handles messages updating our knowledge of the network channel
37 /// graph. Usually this is just a Router object.
38 pub route_handler: Arc<msgs::RoutingMessageHandler>,
41 /// Provides an object which can be used to send data to and which uniquely identifies a connection
42 /// to a remote host. You will need to be able to generate multiple of these which meet Eq and
43 /// implement Hash to meet the PeerManager API.
45 /// For efficiency, Clone should be relatively cheap for this type.
47 /// You probably want to just extend an int and put a file descriptor in a struct and implement
48 /// send_data. Note that if you are using a higher-level net library that may close() itself, be
49 /// careful to ensure you don't have races whereby you might register a new connection with an fd
50 /// the same as a yet-to-be-disconnect_event()-ed.
51 pub trait SocketDescriptor : cmp::Eq + hash::Hash + Clone {
52 /// Attempts to send some data from the given slice to the peer.
54 /// Returns the amount of data which was sent, possibly 0 if the socket has since disconnected.
55 /// Note that in the disconnected case, a disconnect_event must still fire and further write
56 /// attempts may occur until that time.
58 /// If the returned size is smaller than data.len(), a write_available event must
59 /// trigger the next time more data can be written. Additionally, until the a send_data event
60 /// completes fully, no further read_events should trigger on the same peer!
62 /// If a read_event on this descriptor had previously returned true (indicating that read
63 /// events should be paused to prevent DoS in the send buffer), resume_read may be set
64 /// indicating that read events on this descriptor should resume. A resume_read of false does
65 /// *not* imply that further read events should be paused.
66 fn send_data(&mut self, data: &[u8], resume_read: bool) -> usize;
67 /// Disconnect the socket pointed to by this SocketDescriptor. Once this function returns, no
68 /// more calls to write_event, read_event or disconnect_event may be made with this descriptor.
69 /// No disconnect_event should be generated as a result of this call, though obviously races
70 /// may occur whereby disconnect_socket is called after a call to disconnect_event but prior to
71 /// that event completing.
72 fn disconnect_socket(&mut self);
75 /// Error for PeerManager errors. If you get one of these, you must disconnect the socket and
76 /// generate no further read/write_events for the descriptor, only triggering a single
77 /// disconnect_event (unless it was provided in response to a new_*_connection event, in which case
78 /// no such disconnect_event must be generated and the socket be silently disconencted).
79 pub struct PeerHandleError {
80 /// Used to indicate that we probably can't make any future connections to this peer, implying
81 /// we should go ahead and force-close any channels we have with it.
82 no_connection_possible: bool,
84 impl fmt::Debug for PeerHandleError {
85 fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
86 formatter.write_str("Peer Sent Invalid Data")
89 impl fmt::Display for PeerHandleError {
90 fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
91 formatter.write_str("Peer Sent Invalid Data")
94 impl error::Error for PeerHandleError {
95 fn description(&self) -> &str {
96 "Peer Sent Invalid Data"
100 enum InitSyncTracker{
102 ChannelsSyncing(u64),
103 NodesSyncing(PublicKey),
107 channel_encryptor: PeerChannelEncryptor,
109 their_node_id: Option<PublicKey>,
110 their_features: Option<InitFeatures>,
112 pending_outbound_buffer: LinkedList<Vec<u8>>,
113 pending_outbound_buffer_first_msg_offset: usize,
114 awaiting_write_event: bool,
116 pending_read_buffer: Vec<u8>,
117 pending_read_buffer_pos: usize,
118 pending_read_is_header: bool,
120 sync_status: InitSyncTracker,
126 /// Returns true if the channel announcements/updates for the given channel should be
127 /// forwarded to this peer.
128 /// If we are sending our routing table to this peer and we have not yet sent channel
129 /// announcements/updates for the given channel_id then we will send it when we get to that
130 /// point and we shouldn't send it yet to avoid sending duplicate updates. If we've already
131 /// sent the old versions, we should send the update, and so return true here.
132 fn should_forward_channel(&self, channel_id: u64)->bool{
133 match self.sync_status {
134 InitSyncTracker::NoSyncRequested => true,
135 InitSyncTracker::ChannelsSyncing(i) => i < channel_id,
136 InitSyncTracker::NodesSyncing(_) => true,
141 struct PeerHolder<Descriptor: SocketDescriptor> {
142 peers: HashMap<Descriptor, Peer>,
143 /// Added to by do_read_event for cases where we pushed a message onto the send buffer but
144 /// didn't call do_attempt_write_data to avoid reentrancy. Cleared in process_events()
145 peers_needing_send: HashSet<Descriptor>,
146 /// Only add to this set when noise completes:
147 node_id_to_descriptor: HashMap<PublicKey, Descriptor>,
150 #[cfg(not(any(target_pointer_width = "32", target_pointer_width = "64")))]
151 fn _check_usize_is_32_or_64() {
152 // See below, less than 32 bit pointers may be unsafe here!
153 unsafe { mem::transmute::<*const usize, [u8; 4]>(panic!()); }
156 /// SimpleArcPeerManager is useful when you need a PeerManager with a static lifetime, e.g.
157 /// when you're using lightning-net-tokio (since tokio::spawn requires parameters with static
158 /// lifetimes). Other times you can afford a reference, which is more efficient, in which case
159 /// SimpleRefPeerManager is the more appropriate type. Defining these type aliases prevents
160 /// issues such as overly long function definitions.
161 pub type SimpleArcPeerManager<SD, M> = Arc<PeerManager<SD, SimpleArcChannelManager<M>>>;
163 /// SimpleRefPeerManager is a type alias for a PeerManager reference, and is the reference
164 /// counterpart to the SimpleArcPeerManager type alias. Use this type by default when you don't
165 /// need a PeerManager with a static lifetime. You'll need a static lifetime in cases such as
166 /// usage of lightning-net-tokio (since tokio::spawn requires parameters with static lifetimes).
167 /// But if this is not necessary, using a reference is more efficient. Defining these type aliases
168 /// helps with issues such as long function definitions.
169 pub type SimpleRefPeerManager<'a, SD, M> = PeerManager<SD, SimpleRefChannelManager<'a, M>>;
171 /// A PeerManager manages a set of peers, described by their SocketDescriptor and marshalls socket
172 /// events into messages which it passes on to its MessageHandlers.
174 /// Rather than using a plain PeerManager, it is preferable to use either a SimpleArcPeerManager
175 /// a SimpleRefPeerManager, for conciseness. See their documentation for more details, but
176 /// essentially you should default to using a SimpleRefPeerManager, and use a
177 /// SimpleArcPeerManager when you require a PeerManager with a static lifetime, such as when
178 /// you're using lightning-net-tokio.
179 pub struct PeerManager<Descriptor: SocketDescriptor, CM: Deref> where CM::Target: msgs::ChannelMessageHandler {
180 message_handler: MessageHandler<CM>,
181 peers: Mutex<PeerHolder<Descriptor>>,
182 our_node_secret: SecretKey,
183 ephemeral_key_midstate: Sha256Engine,
185 // Usize needs to be at least 32 bits to avoid overflowing both low and high. If usize is 64
186 // bits we will never realistically count into high:
187 peer_counter_low: AtomicUsize,
188 peer_counter_high: AtomicUsize,
190 initial_syncs_sent: AtomicUsize,
194 struct VecWriter(Vec<u8>);
195 impl Writer for VecWriter {
196 fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
197 self.0.extend_from_slice(buf);
200 fn size_hint(&mut self, size: usize) {
201 self.0.reserve_exact(size);
205 macro_rules! encode_msg {
206 ($msg: expr, $msg_code: expr) => {{
207 let mut msg = VecWriter(Vec::new());
208 ($msg_code as u16).write(&mut msg).unwrap();
209 $msg.write(&mut msg).unwrap();
214 //TODO: Really should do something smarter for this
215 const INITIAL_SYNCS_TO_SEND: usize = 5;
217 /// Manages and reacts to connection events. You probably want to use file descriptors as PeerIds.
218 /// PeerIds may repeat, but only after disconnect_event() has been called.
219 impl<Descriptor: SocketDescriptor, CM: Deref> PeerManager<Descriptor, CM> where CM::Target: msgs::ChannelMessageHandler {
220 /// Constructs a new PeerManager with the given message handlers and node_id secret key
221 /// ephemeral_random_data is used to derive per-connection ephemeral keys and must be
222 /// cryptographically secure random bytes.
223 pub fn new(message_handler: MessageHandler<CM>, our_node_secret: SecretKey, ephemeral_random_data: &[u8; 32], logger: Arc<Logger>) -> PeerManager<Descriptor, CM> {
224 let mut ephemeral_key_midstate = Sha256::engine();
225 ephemeral_key_midstate.input(ephemeral_random_data);
228 message_handler: message_handler,
229 peers: Mutex::new(PeerHolder {
230 peers: HashMap::new(),
231 peers_needing_send: HashSet::new(),
232 node_id_to_descriptor: HashMap::new()
234 our_node_secret: our_node_secret,
235 ephemeral_key_midstate,
236 peer_counter_low: AtomicUsize::new(0),
237 peer_counter_high: AtomicUsize::new(0),
238 initial_syncs_sent: AtomicUsize::new(0),
243 /// Get the list of node ids for peers which have completed the initial handshake.
245 /// For outbound connections, this will be the same as the their_node_id parameter passed in to
246 /// new_outbound_connection, however entries will only appear once the initial handshake has
247 /// completed and we are sure the remote peer has the private key for the given node_id.
248 pub fn get_peer_node_ids(&self) -> Vec<PublicKey> {
249 let peers = self.peers.lock().unwrap();
250 peers.peers.values().filter_map(|p| {
251 if !p.channel_encryptor.is_ready_for_encryption() || p.their_features.is_none() {
258 fn get_ephemeral_key(&self) -> SecretKey {
259 let mut ephemeral_hash = self.ephemeral_key_midstate.clone();
260 let low = self.peer_counter_low.fetch_add(1, Ordering::AcqRel);
261 let high = if low == 0 {
262 self.peer_counter_high.fetch_add(1, Ordering::AcqRel)
264 self.peer_counter_high.load(Ordering::Acquire)
266 ephemeral_hash.input(&byte_utils::le64_to_array(low as u64));
267 ephemeral_hash.input(&byte_utils::le64_to_array(high as u64));
268 SecretKey::from_slice(&Sha256::from_engine(ephemeral_hash).into_inner()).expect("You broke SHA-256!")
271 /// Indicates a new outbound connection has been established to a node with the given node_id.
272 /// Note that if an Err is returned here you MUST NOT call disconnect_event for the new
273 /// descriptor but must disconnect the connection immediately.
275 /// Returns a small number of bytes to send to the remote node (currently always 50).
277 /// Panics if descriptor is duplicative with some other descriptor which has not yet has a
278 /// disconnect_event.
279 pub fn new_outbound_connection(&self, their_node_id: PublicKey, descriptor: Descriptor) -> Result<Vec<u8>, PeerHandleError> {
280 let mut peer_encryptor = PeerChannelEncryptor::new_outbound(their_node_id.clone(), self.get_ephemeral_key());
281 let res = peer_encryptor.get_act_one().to_vec();
282 let pending_read_buffer = [0; 50].to_vec(); // Noise act two is 50 bytes
284 let mut peers = self.peers.lock().unwrap();
285 if peers.peers.insert(descriptor, Peer {
286 channel_encryptor: peer_encryptor,
289 their_features: None,
291 pending_outbound_buffer: LinkedList::new(),
292 pending_outbound_buffer_first_msg_offset: 0,
293 awaiting_write_event: false,
295 pending_read_buffer: pending_read_buffer,
296 pending_read_buffer_pos: 0,
297 pending_read_is_header: false,
299 sync_status: InitSyncTracker::NoSyncRequested,
301 awaiting_pong: false,
303 panic!("PeerManager driver duplicated descriptors!");
308 /// Indicates a new inbound connection has been established.
310 /// May refuse the connection by returning an Err, but will never write bytes to the remote end
311 /// (outbound connector always speaks first). Note that if an Err is returned here you MUST NOT
312 /// call disconnect_event for the new descriptor but must disconnect the connection
315 /// Panics if descriptor is duplicative with some other descriptor which has not yet has a
316 /// disconnect_event.
317 pub fn new_inbound_connection(&self, descriptor: Descriptor) -> Result<(), PeerHandleError> {
318 let peer_encryptor = PeerChannelEncryptor::new_inbound(&self.our_node_secret);
319 let pending_read_buffer = [0; 50].to_vec(); // Noise act one is 50 bytes
321 let mut peers = self.peers.lock().unwrap();
322 if peers.peers.insert(descriptor, Peer {
323 channel_encryptor: peer_encryptor,
326 their_features: None,
328 pending_outbound_buffer: LinkedList::new(),
329 pending_outbound_buffer_first_msg_offset: 0,
330 awaiting_write_event: false,
332 pending_read_buffer: pending_read_buffer,
333 pending_read_buffer_pos: 0,
334 pending_read_is_header: false,
336 sync_status: InitSyncTracker::NoSyncRequested,
338 awaiting_pong: false,
340 panic!("PeerManager driver duplicated descriptors!");
345 fn do_attempt_write_data(&self, descriptor: &mut Descriptor, peer: &mut Peer) {
346 macro_rules! encode_and_send_msg {
347 ($msg: expr, $msg_code: expr) => {
349 log_trace!(self, "Encoding and sending sync update message of type {} to {}", $msg_code, log_pubkey!(peer.their_node_id.unwrap()));
350 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!($msg, $msg_code)[..]));
354 const MSG_BUFF_SIZE: usize = 10;
355 while !peer.awaiting_write_event {
356 if peer.pending_outbound_buffer.len() < MSG_BUFF_SIZE {
357 match peer.sync_status {
358 InitSyncTracker::NoSyncRequested => {},
359 InitSyncTracker::ChannelsSyncing(c) if c < 0xffff_ffff_ffff_ffff => {
360 let steps = ((MSG_BUFF_SIZE - peer.pending_outbound_buffer.len() + 2) / 3) as u8;
361 let all_messages = self.message_handler.route_handler.get_next_channel_announcements(0, steps);
362 for &(ref announce, ref update_a, ref update_b) in all_messages.iter() {
363 encode_and_send_msg!(announce, 256);
364 encode_and_send_msg!(update_a, 258);
365 encode_and_send_msg!(update_b, 258);
366 peer.sync_status = InitSyncTracker::ChannelsSyncing(announce.contents.short_channel_id + 1);
368 if all_messages.is_empty() || all_messages.len() != steps as usize {
369 peer.sync_status = InitSyncTracker::ChannelsSyncing(0xffff_ffff_ffff_ffff);
372 InitSyncTracker::ChannelsSyncing(c) if c == 0xffff_ffff_ffff_ffff => {
373 let steps = (MSG_BUFF_SIZE - peer.pending_outbound_buffer.len()) as u8;
374 let all_messages = self.message_handler.route_handler.get_next_node_announcements(None, steps);
375 for msg in all_messages.iter() {
376 encode_and_send_msg!(msg, 256);
377 peer.sync_status = InitSyncTracker::NodesSyncing(msg.contents.node_id);
379 if all_messages.is_empty() || all_messages.len() != steps as usize {
380 peer.sync_status = InitSyncTracker::NoSyncRequested;
383 InitSyncTracker::ChannelsSyncing(_) => unreachable!(),
384 InitSyncTracker::NodesSyncing(key) => {
385 let steps = (MSG_BUFF_SIZE - peer.pending_outbound_buffer.len()) as u8;
386 let all_messages = self.message_handler.route_handler.get_next_node_announcements(Some(&key), steps);
387 for msg in all_messages.iter() {
388 encode_and_send_msg!(msg, 256);
389 peer.sync_status = InitSyncTracker::NodesSyncing(msg.contents.node_id);
391 if all_messages.is_empty() || all_messages.len() != steps as usize {
392 peer.sync_status = InitSyncTracker::NoSyncRequested;
399 let next_buff = match peer.pending_outbound_buffer.front() {
404 let should_be_reading = peer.pending_outbound_buffer.len() < MSG_BUFF_SIZE;
405 let pending = &next_buff[peer.pending_outbound_buffer_first_msg_offset..];
406 let data_sent = descriptor.send_data(pending, should_be_reading);
407 peer.pending_outbound_buffer_first_msg_offset += data_sent;
408 if peer.pending_outbound_buffer_first_msg_offset == next_buff.len() { true } else { false }
410 peer.pending_outbound_buffer_first_msg_offset = 0;
411 peer.pending_outbound_buffer.pop_front();
413 peer.awaiting_write_event = true;
418 /// Indicates that there is room to write data to the given socket descriptor.
420 /// May return an Err to indicate that the connection should be closed.
422 /// Will most likely call send_data on the descriptor passed in (or the descriptor handed into
423 /// new_*\_connection) before returning. Thus, be very careful with reentrancy issues! The
424 /// invariants around calling write_event in case a write did not fully complete must still
425 /// hold - be ready to call write_event again if a write call generated here isn't sufficient!
426 /// Panics if the descriptor was not previously registered in a new_\*_connection event.
427 pub fn write_event(&self, descriptor: &mut Descriptor) -> Result<(), PeerHandleError> {
428 let mut peers = self.peers.lock().unwrap();
429 match peers.peers.get_mut(descriptor) {
430 None => panic!("Descriptor for write_event is not already known to PeerManager"),
432 peer.awaiting_write_event = false;
433 self.do_attempt_write_data(descriptor, peer);
439 /// Indicates that data was read from the given socket descriptor.
441 /// May return an Err to indicate that the connection should be closed.
443 /// Will *not* call back into send_data on any descriptors to avoid reentrancy complexity.
444 /// Thus, however, you almost certainly want to call process_events() after any read_event to
445 /// generate send_data calls to handle responses.
447 /// If Ok(true) is returned, further read_events should not be triggered until a write_event on
448 /// this file descriptor has resume_read set (preventing DoS issues in the send buffer).
450 /// Panics if the descriptor was not previously registered in a new_*_connection event.
451 pub fn read_event(&self, peer_descriptor: &mut Descriptor, data: Vec<u8>) -> Result<bool, PeerHandleError> {
452 match self.do_read_event(peer_descriptor, data) {
455 self.disconnect_event_internal(peer_descriptor, e.no_connection_possible);
461 fn do_read_event(&self, peer_descriptor: &mut Descriptor, data: Vec<u8>) -> Result<bool, PeerHandleError> {
463 let mut peers_lock = self.peers.lock().unwrap();
464 let peers = &mut *peers_lock;
465 let pause_read = match peers.peers.get_mut(peer_descriptor) {
466 None => panic!("Descriptor for read_event is not already known to PeerManager"),
468 assert!(peer.pending_read_buffer.len() > 0);
469 assert!(peer.pending_read_buffer.len() > peer.pending_read_buffer_pos);
471 let mut read_pos = 0;
472 while read_pos < data.len() {
474 let data_to_copy = cmp::min(peer.pending_read_buffer.len() - peer.pending_read_buffer_pos, data.len() - read_pos);
475 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]);
476 read_pos += data_to_copy;
477 peer.pending_read_buffer_pos += data_to_copy;
480 if peer.pending_read_buffer_pos == peer.pending_read_buffer.len() {
481 peer.pending_read_buffer_pos = 0;
483 macro_rules! encode_and_send_msg {
484 ($msg: expr, $msg_code: expr) => {
486 log_trace!(self, "Encoding and sending message of type {} to {}", $msg_code, log_pubkey!(peer.their_node_id.unwrap()));
487 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!($msg, $msg_code)[..]));
488 peers.peers_needing_send.insert(peer_descriptor.clone());
493 macro_rules! try_potential_handleerror {
499 msgs::ErrorAction::DisconnectPeer { msg: _ } => {
500 //TODO: Try to push msg
501 log_trace!(self, "Got Err handling message, disconnecting peer because {}", e.err);
502 return Err(PeerHandleError{ no_connection_possible: false });
504 msgs::ErrorAction::IgnoreError => {
505 log_trace!(self, "Got Err handling message, ignoring because {}", e.err);
508 msgs::ErrorAction::SendErrorMessage { msg } => {
509 log_trace!(self, "Got Err handling message, sending Error message because {}", e.err);
510 encode_and_send_msg!(msg, 17);
519 macro_rules! try_potential_decodeerror {
525 msgs::DecodeError::UnknownVersion => return Err(PeerHandleError{ no_connection_possible: false }),
526 msgs::DecodeError::UnknownRequiredFeature => {
527 log_debug!(self, "Got a channel/node announcement with an known required feature flag, you may want to update!");
530 msgs::DecodeError::InvalidValue => {
531 log_debug!(self, "Got an invalid value while deserializing message");
532 return Err(PeerHandleError{ no_connection_possible: false });
534 msgs::DecodeError::ShortRead => {
535 log_debug!(self, "Deserialization failed due to shortness of message");
536 return Err(PeerHandleError{ no_connection_possible: false });
538 msgs::DecodeError::ExtraAddressesPerType => {
539 log_debug!(self, "Error decoding message, ignoring due to lnd spec incompatibility. See https://github.com/lightningnetwork/lnd/issues/1407");
542 msgs::DecodeError::BadLengthDescriptor => return Err(PeerHandleError{ no_connection_possible: false }),
543 msgs::DecodeError::Io(_) => return Err(PeerHandleError{ no_connection_possible: false }),
550 macro_rules! insert_node_id {
552 match peers.node_id_to_descriptor.entry(peer.their_node_id.unwrap()) {
553 hash_map::Entry::Occupied(_) => {
554 log_trace!(self, "Got second connection with {}, closing", log_pubkey!(peer.their_node_id.unwrap()));
555 peer.their_node_id = None; // Unset so that we don't generate a peer_disconnected event
556 return Err(PeerHandleError{ no_connection_possible: false })
558 hash_map::Entry::Vacant(entry) => {
559 log_trace!(self, "Finished noise handshake for connection with {}", log_pubkey!(peer.their_node_id.unwrap()));
560 entry.insert(peer_descriptor.clone())
566 let next_step = peer.channel_encryptor.get_noise_step();
568 NextNoiseStep::ActOne => {
569 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();
570 peer.pending_outbound_buffer.push_back(act_two);
571 peer.pending_read_buffer = [0; 66].to_vec(); // act three is 66 bytes long
573 NextNoiseStep::ActTwo => {
574 let (act_three, their_node_id) = try_potential_handleerror!(peer.channel_encryptor.process_act_two(&peer.pending_read_buffer[..], &self.our_node_secret));
575 peer.pending_outbound_buffer.push_back(act_three.to_vec());
576 peer.pending_read_buffer = [0; 18].to_vec(); // Message length header is 18 bytes
577 peer.pending_read_is_header = true;
579 peer.their_node_id = Some(their_node_id);
581 let mut features = InitFeatures::supported();
582 if self.initial_syncs_sent.load(Ordering::Acquire) < INITIAL_SYNCS_TO_SEND {
583 self.initial_syncs_sent.fetch_add(1, Ordering::AcqRel);
584 features.set_initial_routing_sync();
586 encode_and_send_msg!(msgs::Init {
590 NextNoiseStep::ActThree => {
591 let their_node_id = try_potential_handleerror!(peer.channel_encryptor.process_act_three(&peer.pending_read_buffer[..]));
592 peer.pending_read_buffer = [0; 18].to_vec(); // Message length header is 18 bytes
593 peer.pending_read_is_header = true;
594 peer.their_node_id = Some(their_node_id);
597 NextNoiseStep::NoiseComplete => {
598 if peer.pending_read_is_header {
599 let msg_len = try_potential_handleerror!(peer.channel_encryptor.decrypt_length_header(&peer.pending_read_buffer[..]));
600 peer.pending_read_buffer = Vec::with_capacity(msg_len as usize + 16);
601 peer.pending_read_buffer.resize(msg_len as usize + 16, 0);
602 if msg_len < 2 { // Need at least the message type tag
603 return Err(PeerHandleError{ no_connection_possible: false });
605 peer.pending_read_is_header = false;
607 let msg_data = try_potential_handleerror!(peer.channel_encryptor.decrypt_message(&peer.pending_read_buffer[..]));
608 assert!(msg_data.len() >= 2);
611 peer.pending_read_buffer = [0; 18].to_vec();
612 peer.pending_read_is_header = true;
614 let msg_type = byte_utils::slice_to_be16(&msg_data[0..2]);
615 log_trace!(self, "Received message of type {} from {}", msg_type, log_pubkey!(peer.their_node_id.unwrap()));
616 if msg_type != 16 && peer.their_features.is_none() {
617 // Need an init message as first message
618 log_trace!(self, "Peer {} sent non-Init first message", log_pubkey!(peer.their_node_id.unwrap()));
619 return Err(PeerHandleError{ no_connection_possible: false });
621 let mut reader = ::std::io::Cursor::new(&msg_data[2..]);
623 // Connection control:
625 let msg = try_potential_decodeerror!(msgs::Init::read(&mut reader));
626 if msg.features.requires_unknown_bits() {
627 log_info!(self, "Peer global features required unknown version bits");
628 return Err(PeerHandleError{ no_connection_possible: true });
630 if msg.features.requires_unknown_bits() {
631 log_info!(self, "Peer local features required unknown version bits");
632 return Err(PeerHandleError{ no_connection_possible: true });
634 if peer.their_features.is_some() {
635 return Err(PeerHandleError{ no_connection_possible: false });
638 log_info!(self, "Received peer Init message: data_loss_protect: {}, initial_routing_sync: {}, upfront_shutdown_script: {}, unkown local flags: {}, unknown global flags: {}",
639 if msg.features.supports_data_loss_protect() { "supported" } else { "not supported"},
640 if msg.features.initial_routing_sync() { "requested" } else { "not requested" },
641 if msg.features.supports_upfront_shutdown_script() { "supported" } else { "not supported"},
642 if msg.features.supports_unknown_bits() { "present" } else { "none" },
643 if msg.features.supports_unknown_bits() { "present" } else { "none" });
645 if msg.features.initial_routing_sync() {
646 peer.sync_status = InitSyncTracker::ChannelsSyncing(0);
647 peers.peers_needing_send.insert(peer_descriptor.clone());
651 let mut features = InitFeatures::supported();
652 if self.initial_syncs_sent.load(Ordering::Acquire) < INITIAL_SYNCS_TO_SEND {
653 self.initial_syncs_sent.fetch_add(1, Ordering::AcqRel);
654 features.set_initial_routing_sync();
657 encode_and_send_msg!(msgs::Init {
662 self.message_handler.chan_handler.peer_connected(&peer.their_node_id.unwrap(), &msg);
663 peer.their_features = Some(msg.features);
666 let msg = try_potential_decodeerror!(msgs::ErrorMessage::read(&mut reader));
667 let mut data_is_printable = true;
668 for b in msg.data.bytes() {
669 if b < 32 || b > 126 {
670 data_is_printable = false;
675 if data_is_printable {
676 log_debug!(self, "Got Err message from {}: {}", log_pubkey!(peer.their_node_id.unwrap()), msg.data);
678 log_debug!(self, "Got Err message from {} with non-ASCII error message", log_pubkey!(peer.their_node_id.unwrap()));
680 self.message_handler.chan_handler.handle_error(&peer.their_node_id.unwrap(), &msg);
681 if msg.channel_id == [0; 32] {
682 return Err(PeerHandleError{ no_connection_possible: true });
687 let msg = try_potential_decodeerror!(msgs::Ping::read(&mut reader));
688 if msg.ponglen < 65532 {
689 let resp = msgs::Pong { byteslen: msg.ponglen };
690 encode_and_send_msg!(resp, 19);
694 peer.awaiting_pong = false;
695 try_potential_decodeerror!(msgs::Pong::read(&mut reader));
699 let msg = try_potential_decodeerror!(msgs::OpenChannel::read(&mut reader));
700 self.message_handler.chan_handler.handle_open_channel(&peer.their_node_id.unwrap(), peer.their_features.clone().unwrap(), &msg);
703 let msg = try_potential_decodeerror!(msgs::AcceptChannel::read(&mut reader));
704 self.message_handler.chan_handler.handle_accept_channel(&peer.their_node_id.unwrap(), peer.their_features.clone().unwrap(), &msg);
708 let msg = try_potential_decodeerror!(msgs::FundingCreated::read(&mut reader));
709 self.message_handler.chan_handler.handle_funding_created(&peer.their_node_id.unwrap(), &msg);
712 let msg = try_potential_decodeerror!(msgs::FundingSigned::read(&mut reader));
713 self.message_handler.chan_handler.handle_funding_signed(&peer.their_node_id.unwrap(), &msg);
716 let msg = try_potential_decodeerror!(msgs::FundingLocked::read(&mut reader));
717 self.message_handler.chan_handler.handle_funding_locked(&peer.their_node_id.unwrap(), &msg);
721 let msg = try_potential_decodeerror!(msgs::Shutdown::read(&mut reader));
722 self.message_handler.chan_handler.handle_shutdown(&peer.their_node_id.unwrap(), &msg);
725 let msg = try_potential_decodeerror!(msgs::ClosingSigned::read(&mut reader));
726 self.message_handler.chan_handler.handle_closing_signed(&peer.their_node_id.unwrap(), &msg);
730 let msg = try_potential_decodeerror!(msgs::UpdateAddHTLC::read(&mut reader));
731 self.message_handler.chan_handler.handle_update_add_htlc(&peer.their_node_id.unwrap(), &msg);
734 let msg = try_potential_decodeerror!(msgs::UpdateFulfillHTLC::read(&mut reader));
735 self.message_handler.chan_handler.handle_update_fulfill_htlc(&peer.their_node_id.unwrap(), &msg);
738 let msg = try_potential_decodeerror!(msgs::UpdateFailHTLC::read(&mut reader));
739 self.message_handler.chan_handler.handle_update_fail_htlc(&peer.their_node_id.unwrap(), &msg);
742 let msg = try_potential_decodeerror!(msgs::UpdateFailMalformedHTLC::read(&mut reader));
743 self.message_handler.chan_handler.handle_update_fail_malformed_htlc(&peer.their_node_id.unwrap(), &msg);
747 let msg = try_potential_decodeerror!(msgs::CommitmentSigned::read(&mut reader));
748 self.message_handler.chan_handler.handle_commitment_signed(&peer.their_node_id.unwrap(), &msg);
751 let msg = try_potential_decodeerror!(msgs::RevokeAndACK::read(&mut reader));
752 self.message_handler.chan_handler.handle_revoke_and_ack(&peer.their_node_id.unwrap(), &msg);
755 let msg = try_potential_decodeerror!(msgs::UpdateFee::read(&mut reader));
756 self.message_handler.chan_handler.handle_update_fee(&peer.their_node_id.unwrap(), &msg);
759 let msg = try_potential_decodeerror!(msgs::ChannelReestablish::read(&mut reader));
760 self.message_handler.chan_handler.handle_channel_reestablish(&peer.their_node_id.unwrap(), &msg);
765 let msg = try_potential_decodeerror!(msgs::AnnouncementSignatures::read(&mut reader));
766 self.message_handler.chan_handler.handle_announcement_signatures(&peer.their_node_id.unwrap(), &msg);
769 let msg = try_potential_decodeerror!(msgs::ChannelAnnouncement::read(&mut reader));
770 let should_forward = try_potential_handleerror!(self.message_handler.route_handler.handle_channel_announcement(&msg));
773 // TODO: forward msg along to all our other peers!
777 let msg = try_potential_decodeerror!(msgs::NodeAnnouncement::read(&mut reader));
778 let should_forward = try_potential_handleerror!(self.message_handler.route_handler.handle_node_announcement(&msg));
781 // TODO: forward msg along to all our other peers!
785 let msg = try_potential_decodeerror!(msgs::ChannelUpdate::read(&mut reader));
786 let should_forward = try_potential_handleerror!(self.message_handler.route_handler.handle_channel_update(&msg));
789 // TODO: forward msg along to all our other peers!
793 if (msg_type & 1) == 0 {
794 return Err(PeerHandleError{ no_connection_possible: true });
804 self.do_attempt_write_data(peer_descriptor, peer);
806 peer.pending_outbound_buffer.len() > 10 // pause_read
816 /// Checks for any events generated by our handlers and processes them. Includes sending most
817 /// response messages as well as messages generated by calls to handler functions directly (eg
818 /// functions like ChannelManager::process_pending_htlc_forward or send_payment).
819 pub fn process_events(&self) {
821 // TODO: There are some DoS attacks here where you can flood someone's outbound send
822 // buffer by doing things like announcing channels on another node. We should be willing to
823 // drop optional-ish messages when send buffers get full!
825 let mut events_generated = self.message_handler.chan_handler.get_and_clear_pending_msg_events();
826 let mut peers_lock = self.peers.lock().unwrap();
827 let peers = &mut *peers_lock;
828 for event in events_generated.drain(..) {
829 macro_rules! get_peer_for_forwarding {
830 ($node_id: expr, $handle_no_such_peer: block) => {
832 let descriptor = match peers.node_id_to_descriptor.get($node_id) {
833 Some(descriptor) => descriptor.clone(),
835 $handle_no_such_peer;
839 match peers.peers.get_mut(&descriptor) {
841 if peer.their_features.is_none() {
842 $handle_no_such_peer;
847 None => panic!("Inconsistent peers set state!"),
853 MessageSendEvent::SendAcceptChannel { ref node_id, ref msg } => {
854 log_trace!(self, "Handling SendAcceptChannel event in peer_handler for node {} for channel {}",
855 log_pubkey!(node_id),
856 log_bytes!(msg.temporary_channel_id));
857 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
858 //TODO: Drop the pending channel? (or just let it timeout, but that sucks)
860 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 33)));
861 self.do_attempt_write_data(&mut descriptor, peer);
863 MessageSendEvent::SendOpenChannel { ref node_id, ref msg } => {
864 log_trace!(self, "Handling SendOpenChannel event in peer_handler for node {} for channel {}",
865 log_pubkey!(node_id),
866 log_bytes!(msg.temporary_channel_id));
867 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
868 //TODO: Drop the pending channel? (or just let it timeout, but that sucks)
870 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 32)));
871 self.do_attempt_write_data(&mut descriptor, peer);
873 MessageSendEvent::SendFundingCreated { ref node_id, ref msg } => {
874 log_trace!(self, "Handling SendFundingCreated event in peer_handler for node {} for channel {} (which becomes {})",
875 log_pubkey!(node_id),
876 log_bytes!(msg.temporary_channel_id),
877 log_funding_channel_id!(msg.funding_txid, msg.funding_output_index));
878 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
879 //TODO: generate a DiscardFunding event indicating to the wallet that
880 //they should just throw away this funding transaction
882 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 34)));
883 self.do_attempt_write_data(&mut descriptor, peer);
885 MessageSendEvent::SendFundingSigned { ref node_id, ref msg } => {
886 log_trace!(self, "Handling SendFundingSigned event in peer_handler for node {} for channel {}",
887 log_pubkey!(node_id),
888 log_bytes!(msg.channel_id));
889 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
890 //TODO: generate a DiscardFunding event indicating to the wallet that
891 //they should just throw away this funding transaction
893 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 35)));
894 self.do_attempt_write_data(&mut descriptor, peer);
896 MessageSendEvent::SendFundingLocked { ref node_id, ref msg } => {
897 log_trace!(self, "Handling SendFundingLocked event in peer_handler for node {} for channel {}",
898 log_pubkey!(node_id),
899 log_bytes!(msg.channel_id));
900 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
901 //TODO: Do whatever we're gonna do for handling dropped messages
903 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 36)));
904 self.do_attempt_write_data(&mut descriptor, peer);
906 MessageSendEvent::SendAnnouncementSignatures { ref node_id, ref msg } => {
907 log_trace!(self, "Handling SendAnnouncementSignatures event in peer_handler for node {} for channel {})",
908 log_pubkey!(node_id),
909 log_bytes!(msg.channel_id));
910 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
911 //TODO: generate a DiscardFunding event indicating to the wallet that
912 //they should just throw away this funding transaction
914 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 259)));
915 self.do_attempt_write_data(&mut descriptor, peer);
917 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 } } => {
918 log_trace!(self, "Handling UpdateHTLCs event in peer_handler for node {} with {} adds, {} fulfills, {} fails for channel {}",
919 log_pubkey!(node_id),
920 update_add_htlcs.len(),
921 update_fulfill_htlcs.len(),
922 update_fail_htlcs.len(),
923 log_bytes!(commitment_signed.channel_id));
924 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
925 //TODO: Do whatever we're gonna do for handling dropped messages
927 for msg in update_add_htlcs {
928 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 128)));
930 for msg in update_fulfill_htlcs {
931 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 130)));
933 for msg in update_fail_htlcs {
934 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 131)));
936 for msg in update_fail_malformed_htlcs {
937 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 135)));
939 if let &Some(ref msg) = update_fee {
940 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 134)));
942 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(commitment_signed, 132)));
943 self.do_attempt_write_data(&mut descriptor, peer);
945 MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
946 log_trace!(self, "Handling SendRevokeAndACK event in peer_handler for node {} for channel {}",
947 log_pubkey!(node_id),
948 log_bytes!(msg.channel_id));
949 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
950 //TODO: Do whatever we're gonna do for handling dropped messages
952 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 133)));
953 self.do_attempt_write_data(&mut descriptor, peer);
955 MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
956 log_trace!(self, "Handling SendClosingSigned event in peer_handler for node {} for channel {}",
957 log_pubkey!(node_id),
958 log_bytes!(msg.channel_id));
959 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
960 //TODO: Do whatever we're gonna do for handling dropped messages
962 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 39)));
963 self.do_attempt_write_data(&mut descriptor, peer);
965 MessageSendEvent::SendShutdown { ref node_id, ref msg } => {
966 log_trace!(self, "Handling Shutdown event in peer_handler for node {} for channel {}",
967 log_pubkey!(node_id),
968 log_bytes!(msg.channel_id));
969 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
970 //TODO: Do whatever we're gonna do for handling dropped messages
972 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 38)));
973 self.do_attempt_write_data(&mut descriptor, peer);
975 MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
976 log_trace!(self, "Handling SendChannelReestablish event in peer_handler for node {} for channel {}",
977 log_pubkey!(node_id),
978 log_bytes!(msg.channel_id));
979 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
980 //TODO: Do whatever we're gonna do for handling dropped messages
982 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 136)));
983 self.do_attempt_write_data(&mut descriptor, peer);
985 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
986 log_trace!(self, "Handling BroadcastChannelAnnouncement event in peer_handler for short channel id {}", msg.contents.short_channel_id);
987 if self.message_handler.route_handler.handle_channel_announcement(msg).is_ok() && self.message_handler.route_handler.handle_channel_update(update_msg).is_ok() {
988 let encoded_msg = encode_msg!(msg, 256);
989 let encoded_update_msg = encode_msg!(update_msg, 258);
991 for (ref descriptor, ref mut peer) in peers.peers.iter_mut() {
992 if !peer.channel_encryptor.is_ready_for_encryption() || peer.their_features.is_none() ||
993 !peer.should_forward_channel(msg.contents.short_channel_id) {
996 match peer.their_node_id {
998 Some(their_node_id) => {
999 if their_node_id == msg.contents.node_id_1 || their_node_id == msg.contents.node_id_2 {
1004 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_msg[..]));
1005 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_update_msg[..]));
1006 self.do_attempt_write_data(&mut (*descriptor).clone(), peer);
1010 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
1011 log_trace!(self, "Handling BroadcastChannelUpdate event in peer_handler for short channel id {}", msg.contents.short_channel_id);
1012 if self.message_handler.route_handler.handle_channel_update(msg).is_ok() {
1013 let encoded_msg = encode_msg!(msg, 258);
1015 for (ref descriptor, ref mut peer) in peers.peers.iter_mut() {
1016 if !peer.channel_encryptor.is_ready_for_encryption() || peer.their_features.is_none() ||
1017 !peer.should_forward_channel(msg.contents.short_channel_id) {
1020 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_msg[..]));
1021 self.do_attempt_write_data(&mut (*descriptor).clone(), peer);
1025 MessageSendEvent::PaymentFailureNetworkUpdate { ref update } => {
1026 self.message_handler.route_handler.handle_htlc_fail_channel_update(update);
1028 MessageSendEvent::HandleError { ref node_id, ref action } => {
1030 msgs::ErrorAction::DisconnectPeer { ref msg } => {
1031 if let Some(mut descriptor) = peers.node_id_to_descriptor.remove(node_id) {
1032 peers.peers_needing_send.remove(&descriptor);
1033 if let Some(mut peer) = peers.peers.remove(&descriptor) {
1034 if let Some(ref msg) = *msg {
1035 log_trace!(self, "Handling DisconnectPeer HandleError event in peer_handler for node {} with message {}",
1036 log_pubkey!(node_id),
1038 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 17)));
1039 // This isn't guaranteed to work, but if there is enough free
1040 // room in the send buffer, put the error message there...
1041 self.do_attempt_write_data(&mut descriptor, &mut peer);
1043 log_trace!(self, "Handling DisconnectPeer HandleError event in peer_handler for node {} with no message", log_pubkey!(node_id));
1046 descriptor.disconnect_socket();
1047 self.message_handler.chan_handler.peer_disconnected(&node_id, false);
1050 msgs::ErrorAction::IgnoreError => {},
1051 msgs::ErrorAction::SendErrorMessage { ref msg } => {
1052 log_trace!(self, "Handling SendErrorMessage HandleError event in peer_handler for node {} with message {}",
1053 log_pubkey!(node_id),
1055 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
1056 //TODO: Do whatever we're gonna do for handling dropped messages
1058 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 17)));
1059 self.do_attempt_write_data(&mut descriptor, peer);
1066 for mut descriptor in peers.peers_needing_send.drain() {
1067 match peers.peers.get_mut(&descriptor) {
1068 Some(peer) => self.do_attempt_write_data(&mut descriptor, peer),
1069 None => panic!("Inconsistent peers set state!"),
1075 /// Indicates that the given socket descriptor's connection is now closed.
1077 /// This must be called even if a PeerHandleError was given for a read_event or write_event,
1078 /// but must NOT be called if a PeerHandleError was provided out of a new_\*\_connection event!
1080 /// Panics if the descriptor was not previously registered in a successful new_*_connection event.
1081 pub fn disconnect_event(&self, descriptor: &Descriptor) {
1082 self.disconnect_event_internal(descriptor, false);
1085 fn disconnect_event_internal(&self, descriptor: &Descriptor, no_connection_possible: bool) {
1086 let mut peers = self.peers.lock().unwrap();
1087 peers.peers_needing_send.remove(descriptor);
1088 let peer_option = peers.peers.remove(descriptor);
1090 None => panic!("Descriptor for disconnect_event is not already known to PeerManager"),
1092 match peer.their_node_id {
1094 peers.node_id_to_descriptor.remove(&node_id);
1095 self.message_handler.chan_handler.peer_disconnected(&node_id, no_connection_possible);
1103 /// This function should be called roughly once every 30 seconds.
1104 /// It will send pings to each peer and disconnect those which did not respond to the last round of pings.
1106 /// Will most likely call send_data on all of the registered descriptors, thus, be very careful with reentrancy issues!
1107 pub fn timer_tick_occured(&self) {
1108 let mut peers_lock = self.peers.lock().unwrap();
1110 let peers = &mut *peers_lock;
1111 let peers_needing_send = &mut peers.peers_needing_send;
1112 let node_id_to_descriptor = &mut peers.node_id_to_descriptor;
1113 let peers = &mut peers.peers;
1115 peers.retain(|descriptor, peer| {
1116 if peer.awaiting_pong == true {
1117 peers_needing_send.remove(descriptor);
1118 match peer.their_node_id {
1120 node_id_to_descriptor.remove(&node_id);
1121 self.message_handler.chan_handler.peer_disconnected(&node_id, true);
1127 let ping = msgs::Ping {
1131 peer.pending_outbound_buffer.push_back(encode_msg!(ping, 18));
1132 let mut descriptor_clone = descriptor.clone();
1133 self.do_attempt_write_data(&mut descriptor_clone, peer);
1135 if peer.awaiting_pong {
1136 false // Drop the peer
1138 peer.awaiting_pong = true;
1148 use ln::peer_handler::{PeerManager, MessageHandler, SocketDescriptor};
1151 use util::test_utils;
1152 use util::logger::Logger;
1154 use secp256k1::Secp256k1;
1155 use secp256k1::key::{SecretKey, PublicKey};
1157 use rand::{thread_rng, Rng};
1159 use std::sync::{Arc};
1161 #[derive(PartialEq, Eq, Clone, Hash)]
1162 struct FileDescriptor {
1166 impl SocketDescriptor for FileDescriptor {
1167 fn send_data(&mut self, data: &[u8], _resume_read: bool) -> usize {
1171 fn disconnect_socket(&mut self) {}
1174 fn create_chan_handlers(peer_count: usize) -> Vec<test_utils::TestChannelMessageHandler> {
1175 let mut chan_handlers = Vec::new();
1176 for _ in 0..peer_count {
1177 let chan_handler = test_utils::TestChannelMessageHandler::new();
1178 chan_handlers.push(chan_handler);
1184 fn create_network<'a>(peer_count: usize, chan_handlers: &'a Vec<test_utils::TestChannelMessageHandler>) -> Vec<PeerManager<FileDescriptor, &'a test_utils::TestChannelMessageHandler>> {
1185 let mut peers = Vec::new();
1186 let mut rng = thread_rng();
1187 let logger : Arc<Logger> = Arc::new(test_utils::TestLogger::new());
1188 let mut ephemeral_bytes = [0; 32];
1189 rng.fill_bytes(&mut ephemeral_bytes);
1191 for i in 0..peer_count {
1192 let router = test_utils::TestRoutingMessageHandler::new();
1194 let mut key_slice = [0;32];
1195 rng.fill_bytes(&mut key_slice);
1196 SecretKey::from_slice(&key_slice).unwrap()
1198 let msg_handler = MessageHandler { chan_handler: &chan_handlers[i], route_handler: Arc::new(router) };
1199 let peer = PeerManager::new(msg_handler, node_id, &ephemeral_bytes, Arc::clone(&logger));
1206 fn establish_connection<'a>(peer_a: &PeerManager<FileDescriptor, &'a test_utils::TestChannelMessageHandler>, peer_b: &PeerManager<FileDescriptor, &'a test_utils::TestChannelMessageHandler>) {
1207 let secp_ctx = Secp256k1::new();
1208 let their_id = PublicKey::from_secret_key(&secp_ctx, &peer_b.our_node_secret);
1209 let fd = FileDescriptor { fd: 1};
1210 peer_a.new_inbound_connection(fd.clone()).unwrap();
1211 peer_a.peers.lock().unwrap().node_id_to_descriptor.insert(their_id, fd.clone());
1215 fn test_disconnect_peer() {
1216 // Simple test which builds a network of PeerManager, connects and brings them to NoiseState::Finished and
1217 // push a DisconnectPeer event to remove the node flagged by id
1218 let chan_handlers = create_chan_handlers(2);
1219 let chan_handler = test_utils::TestChannelMessageHandler::new();
1220 let mut peers = create_network(2, &chan_handlers);
1221 establish_connection(&peers[0], &peers[1]);
1222 assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1);
1224 let secp_ctx = Secp256k1::new();
1225 let their_id = PublicKey::from_secret_key(&secp_ctx, &peers[1].our_node_secret);
1227 chan_handler.pending_events.lock().unwrap().push(events::MessageSendEvent::HandleError {
1229 action: msgs::ErrorAction::DisconnectPeer { msg: None },
1231 assert_eq!(chan_handler.pending_events.lock().unwrap().len(), 1);
1232 peers[0].message_handler.chan_handler = &chan_handler;
1234 peers[0].process_events();
1235 assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 0);
1238 fn test_timer_tick_occured(){
1239 // Create peers, a vector of two peer managers, perform initial set up and check that peers[0] has one Peer.
1240 let chan_handlers = create_chan_handlers(2);
1241 let peers = create_network(2, &chan_handlers);
1242 establish_connection(&peers[0], &peers[1]);
1243 assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1);
1245 // peers[0] awaiting_pong is set to true, but the Peer is still connected
1246 peers[0].timer_tick_occured();
1247 assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1);
1249 // Since timer_tick_occured() is called again when awaiting_pong is true, all Peers are disconnected
1250 peers[0].timer_tick_occured();
1251 assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 0);