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 util::ser::{Writeable, Writer, Readable};
14 use ln::peer_channel_encryptor::{PeerChannelEncryptor,NextNoiseStep};
16 use util::events::{MessageSendEvent};
17 use util::logger::Logger;
19 use std::collections::{HashMap,hash_map,HashSet,LinkedList};
20 use std::sync::{Arc, Mutex};
21 use std::sync::atomic::{AtomicUsize, Ordering};
22 use std::{cmp,error,hash,fmt};
24 use bitcoin_hashes::sha256::Hash as Sha256;
25 use bitcoin_hashes::sha256::HashEngine as Sha256Engine;
26 use bitcoin_hashes::{HashEngine, Hash};
28 /// Provides references to trait impls which handle different types of messages.
29 pub struct MessageHandler {
30 /// A message handler which handles messages specific to channels. Usually this is just a
31 /// ChannelManager object.
32 pub chan_handler: Arc<msgs::ChannelMessageHandler>,
33 /// A message handler which handles messages updating our knowledge of the network channel
34 /// graph. Usually this is just a Router object.
35 pub route_handler: Arc<msgs::RoutingMessageHandler>,
38 /// Provides an object which can be used to send data to and which uniquely identifies a connection
39 /// to a remote host. You will need to be able to generate multiple of these which meet Eq and
40 /// implement Hash to meet the PeerManager API.
42 /// For efficiency, Clone should be relatively cheap for this type.
44 /// You probably want to just extend an int and put a file descriptor in a struct and implement
45 /// send_data. Note that if you are using a higher-level net library that may close() itself, be
46 /// careful to ensure you don't have races whereby you might register a new connection with an fd
47 /// the same as a yet-to-be-disconnect_event()-ed.
48 pub trait SocketDescriptor : cmp::Eq + hash::Hash + Clone {
49 /// Attempts to send some data from the given slice to the peer.
51 /// Returns the amount of data which was sent, possibly 0 if the socket has since disconnected.
52 /// Note that in the disconnected case, a disconnect_event must still fire and further write
53 /// attempts may occur until that time.
55 /// If the returned size is smaller than data.len(), a write_available event must
56 /// trigger the next time more data can be written. Additionally, until the a send_data event
57 /// completes fully, no further read_events should trigger on the same peer!
59 /// If a read_event on this descriptor had previously returned true (indicating that read
60 /// events should be paused to prevent DoS in the send buffer), resume_read may be set
61 /// indicating that read events on this descriptor should resume. A resume_read of false does
62 /// *not* imply that further read events should be paused.
63 fn send_data(&mut self, data: &[u8], resume_read: bool) -> usize;
64 /// Disconnect the socket pointed to by this SocketDescriptor. Once this function returns, no
65 /// more calls to write_event, read_event or disconnect_event may be made with this descriptor.
66 /// No disconnect_event should be generated as a result of this call, though obviously races
67 /// may occur whereby disconnect_socket is called after a call to disconnect_event but prior to
68 /// that event completing.
69 fn disconnect_socket(&mut self);
72 /// Error for PeerManager errors. If you get one of these, you must disconnect the socket and
73 /// generate no further read/write_events for the descriptor, only triggering a single
74 /// disconnect_event (unless it was provided in response to a new_*_connection event, in which case
75 /// no such disconnect_event must be generated and the socket be silently disconencted).
76 pub struct PeerHandleError {
77 /// Used to indicate that we probably can't make any future connections to this peer, implying
78 /// we should go ahead and force-close any channels we have with it.
79 no_connection_possible: bool,
81 impl fmt::Debug for PeerHandleError {
82 fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
83 formatter.write_str("Peer Sent Invalid Data")
86 impl fmt::Display for PeerHandleError {
87 fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
88 formatter.write_str("Peer Sent Invalid Data")
91 impl error::Error for PeerHandleError {
92 fn description(&self) -> &str {
93 "Peer Sent Invalid Data"
100 NodesSyncing(PublicKey),
104 channel_encryptor: PeerChannelEncryptor,
106 their_node_id: Option<PublicKey>,
107 their_features: Option<InitFeatures>,
109 pending_outbound_buffer: LinkedList<Vec<u8>>,
110 pending_outbound_buffer_first_msg_offset: usize,
111 awaiting_write_event: bool,
113 pending_read_buffer: Vec<u8>,
114 pending_read_buffer_pos: usize,
115 pending_read_is_header: bool,
117 sync_status: InitSyncTracker,
123 /// Returns true if the channel announcements/updates for the given channel should be
124 /// forwarded to this peer.
125 /// If we are sending our routing table to this peer and we have not yet sent channel
126 /// announcements/updates for the given channel_id then we will send it when we get to that
127 /// point and we shouldn't send it yet to avoid sending duplicate updates. If we've already
128 /// sent the old versions, we should send the update, and so return true here.
129 fn should_forward_channel(&self, channel_id: u64)->bool{
130 match self.sync_status {
131 InitSyncTracker::NoSyncRequested => true,
132 InitSyncTracker::ChannelsSyncing(i) => i < channel_id,
133 InitSyncTracker::NodesSyncing(_) => true,
138 struct PeerHolder<Descriptor: SocketDescriptor> {
139 peers: HashMap<Descriptor, Peer>,
140 /// Added to by do_read_event for cases where we pushed a message onto the send buffer but
141 /// didn't call do_attempt_write_data to avoid reentrancy. Cleared in process_events()
142 peers_needing_send: HashSet<Descriptor>,
143 /// Only add to this set when noise completes:
144 node_id_to_descriptor: HashMap<PublicKey, Descriptor>,
147 #[cfg(not(any(target_pointer_width = "32", target_pointer_width = "64")))]
148 fn _check_usize_is_32_or_64() {
149 // See below, less than 32 bit pointers may be unsafe here!
150 unsafe { mem::transmute::<*const usize, [u8; 4]>(panic!()); }
153 /// A PeerManager manages a set of peers, described by their SocketDescriptor and marshalls socket
154 /// events into messages which it passes on to its MessageHandlers.
155 pub struct PeerManager<Descriptor: SocketDescriptor> {
156 message_handler: MessageHandler,
157 peers: Mutex<PeerHolder<Descriptor>>,
158 our_node_secret: SecretKey,
159 ephemeral_key_midstate: Sha256Engine,
161 // Usize needs to be at least 32 bits to avoid overflowing both low and high. If usize is 64
162 // bits we will never realistically count into high:
163 peer_counter_low: AtomicUsize,
164 peer_counter_high: AtomicUsize,
166 initial_syncs_sent: AtomicUsize,
170 struct VecWriter(Vec<u8>);
171 impl Writer for VecWriter {
172 fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
173 self.0.extend_from_slice(buf);
176 fn size_hint(&mut self, size: usize) {
177 self.0.reserve_exact(size);
181 macro_rules! encode_msg {
182 ($msg: expr, $msg_code: expr) => {{
183 let mut msg = VecWriter(Vec::new());
184 ($msg_code as u16).write(&mut msg).unwrap();
185 $msg.write(&mut msg).unwrap();
190 //TODO: Really should do something smarter for this
191 const INITIAL_SYNCS_TO_SEND: usize = 5;
193 /// Manages and reacts to connection events. You probably want to use file descriptors as PeerIds.
194 /// PeerIds may repeat, but only after disconnect_event() has been called.
195 impl<Descriptor: SocketDescriptor> PeerManager<Descriptor> {
196 /// Constructs a new PeerManager with the given message handlers and node_id secret key
197 /// ephemeral_random_data is used to derive per-connection ephemeral keys and must be
198 /// cryptographically secure random bytes.
199 pub fn new(message_handler: MessageHandler, our_node_secret: SecretKey, ephemeral_random_data: &[u8; 32], logger: Arc<Logger>) -> PeerManager<Descriptor> {
200 let mut ephemeral_key_midstate = Sha256::engine();
201 ephemeral_key_midstate.input(ephemeral_random_data);
204 message_handler: message_handler,
205 peers: Mutex::new(PeerHolder {
206 peers: HashMap::new(),
207 peers_needing_send: HashSet::new(),
208 node_id_to_descriptor: HashMap::new()
210 our_node_secret: our_node_secret,
211 ephemeral_key_midstate,
212 peer_counter_low: AtomicUsize::new(0),
213 peer_counter_high: AtomicUsize::new(0),
214 initial_syncs_sent: AtomicUsize::new(0),
219 /// Get the list of node ids for peers which have completed the initial handshake.
221 /// For outbound connections, this will be the same as the their_node_id parameter passed in to
222 /// new_outbound_connection, however entries will only appear once the initial handshake has
223 /// completed and we are sure the remote peer has the private key for the given node_id.
224 pub fn get_peer_node_ids(&self) -> Vec<PublicKey> {
225 let peers = self.peers.lock().unwrap();
226 peers.peers.values().filter_map(|p| {
227 if !p.channel_encryptor.is_ready_for_encryption() || p.their_features.is_none() {
234 fn get_ephemeral_key(&self) -> SecretKey {
235 let mut ephemeral_hash = self.ephemeral_key_midstate.clone();
236 let low = self.peer_counter_low.fetch_add(1, Ordering::AcqRel);
237 let high = if low == 0 {
238 self.peer_counter_high.fetch_add(1, Ordering::AcqRel)
240 self.peer_counter_high.load(Ordering::Acquire)
242 ephemeral_hash.input(&byte_utils::le64_to_array(low as u64));
243 ephemeral_hash.input(&byte_utils::le64_to_array(high as u64));
244 SecretKey::from_slice(&Sha256::from_engine(ephemeral_hash).into_inner()).expect("You broke SHA-256!")
247 /// Indicates a new outbound connection has been established to a node with the given node_id.
248 /// Note that if an Err is returned here you MUST NOT call disconnect_event for the new
249 /// descriptor but must disconnect the connection immediately.
251 /// Returns a small number of bytes to send to the remote node (currently always 50).
253 /// Panics if descriptor is duplicative with some other descriptor which has not yet has a
254 /// disconnect_event.
255 pub fn new_outbound_connection(&self, their_node_id: PublicKey, descriptor: Descriptor) -> Result<Vec<u8>, PeerHandleError> {
256 let mut peer_encryptor = PeerChannelEncryptor::new_outbound(their_node_id.clone(), self.get_ephemeral_key());
257 let res = peer_encryptor.get_act_one().to_vec();
258 let pending_read_buffer = [0; 50].to_vec(); // Noise act two is 50 bytes
260 let mut peers = self.peers.lock().unwrap();
261 if peers.peers.insert(descriptor, Peer {
262 channel_encryptor: peer_encryptor,
265 their_features: None,
267 pending_outbound_buffer: LinkedList::new(),
268 pending_outbound_buffer_first_msg_offset: 0,
269 awaiting_write_event: false,
271 pending_read_buffer: pending_read_buffer,
272 pending_read_buffer_pos: 0,
273 pending_read_is_header: false,
275 sync_status: InitSyncTracker::NoSyncRequested,
277 awaiting_pong: false,
279 panic!("PeerManager driver duplicated descriptors!");
284 /// Indicates a new inbound connection has been established.
286 /// May refuse the connection by returning an Err, but will never write bytes to the remote end
287 /// (outbound connector always speaks first). Note that if an Err is returned here you MUST NOT
288 /// call disconnect_event for the new descriptor but must disconnect the connection
291 /// Panics if descriptor is duplicative with some other descriptor which has not yet has a
292 /// disconnect_event.
293 pub fn new_inbound_connection(&self, descriptor: Descriptor) -> Result<(), PeerHandleError> {
294 let peer_encryptor = PeerChannelEncryptor::new_inbound(&self.our_node_secret);
295 let pending_read_buffer = [0; 50].to_vec(); // Noise act one is 50 bytes
297 let mut peers = self.peers.lock().unwrap();
298 if peers.peers.insert(descriptor, Peer {
299 channel_encryptor: peer_encryptor,
302 their_features: None,
304 pending_outbound_buffer: LinkedList::new(),
305 pending_outbound_buffer_first_msg_offset: 0,
306 awaiting_write_event: false,
308 pending_read_buffer: pending_read_buffer,
309 pending_read_buffer_pos: 0,
310 pending_read_is_header: false,
312 sync_status: InitSyncTracker::NoSyncRequested,
314 awaiting_pong: false,
316 panic!("PeerManager driver duplicated descriptors!");
321 fn do_attempt_write_data(&self, descriptor: &mut Descriptor, peer: &mut Peer) {
322 macro_rules! encode_and_send_msg {
323 ($msg: expr, $msg_code: expr) => {
325 log_trace!(self, "Encoding and sending sync update message of type {} to {}", $msg_code, log_pubkey!(peer.their_node_id.unwrap()));
326 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!($msg, $msg_code)[..]));
330 const MSG_BUFF_SIZE: usize = 10;
331 while !peer.awaiting_write_event {
332 if peer.pending_outbound_buffer.len() < MSG_BUFF_SIZE {
333 match peer.sync_status {
334 InitSyncTracker::NoSyncRequested => {},
335 InitSyncTracker::ChannelsSyncing(c) if c < 0xffff_ffff_ffff_ffff => {
336 let steps = ((MSG_BUFF_SIZE - peer.pending_outbound_buffer.len() + 2) / 3) as u8;
337 let all_messages = self.message_handler.route_handler.get_next_channel_announcements(0, steps);
338 for &(ref announce, ref update_a, ref update_b) in all_messages.iter() {
339 encode_and_send_msg!(announce, 256);
340 encode_and_send_msg!(update_a, 258);
341 encode_and_send_msg!(update_b, 258);
342 peer.sync_status = InitSyncTracker::ChannelsSyncing(announce.contents.short_channel_id + 1);
344 if all_messages.is_empty() || all_messages.len() != steps as usize {
345 peer.sync_status = InitSyncTracker::ChannelsSyncing(0xffff_ffff_ffff_ffff);
348 InitSyncTracker::ChannelsSyncing(c) if c == 0xffff_ffff_ffff_ffff => {
349 let steps = (MSG_BUFF_SIZE - peer.pending_outbound_buffer.len()) as u8;
350 let all_messages = self.message_handler.route_handler.get_next_node_announcements(None, steps);
351 for msg in all_messages.iter() {
352 encode_and_send_msg!(msg, 256);
353 peer.sync_status = InitSyncTracker::NodesSyncing(msg.contents.node_id);
355 if all_messages.is_empty() || all_messages.len() != steps as usize {
356 peer.sync_status = InitSyncTracker::NoSyncRequested;
359 InitSyncTracker::ChannelsSyncing(_) => unreachable!(),
360 InitSyncTracker::NodesSyncing(key) => {
361 let steps = (MSG_BUFF_SIZE - peer.pending_outbound_buffer.len()) as u8;
362 let all_messages = self.message_handler.route_handler.get_next_node_announcements(Some(&key), steps);
363 for msg in all_messages.iter() {
364 encode_and_send_msg!(msg, 256);
365 peer.sync_status = InitSyncTracker::NodesSyncing(msg.contents.node_id);
367 if all_messages.is_empty() || all_messages.len() != steps as usize {
368 peer.sync_status = InitSyncTracker::NoSyncRequested;
375 let next_buff = match peer.pending_outbound_buffer.front() {
380 let should_be_reading = peer.pending_outbound_buffer.len() < MSG_BUFF_SIZE;
381 let pending = &next_buff[peer.pending_outbound_buffer_first_msg_offset..];
382 let data_sent = descriptor.send_data(pending, should_be_reading);
383 peer.pending_outbound_buffer_first_msg_offset += data_sent;
384 if peer.pending_outbound_buffer_first_msg_offset == next_buff.len() { true } else { false }
386 peer.pending_outbound_buffer_first_msg_offset = 0;
387 peer.pending_outbound_buffer.pop_front();
389 peer.awaiting_write_event = true;
394 /// Indicates that there is room to write data to the given socket descriptor.
396 /// May return an Err to indicate that the connection should be closed.
398 /// Will most likely call send_data on the descriptor passed in (or the descriptor handed into
399 /// new_*\_connection) before returning. Thus, be very careful with reentrancy issues! The
400 /// invariants around calling write_event in case a write did not fully complete must still
401 /// hold - be ready to call write_event again if a write call generated here isn't sufficient!
402 /// Panics if the descriptor was not previously registered in a new_\*_connection event.
403 pub fn write_event(&self, descriptor: &mut Descriptor) -> Result<(), PeerHandleError> {
404 let mut peers = self.peers.lock().unwrap();
405 match peers.peers.get_mut(descriptor) {
406 None => panic!("Descriptor for write_event is not already known to PeerManager"),
408 peer.awaiting_write_event = false;
409 self.do_attempt_write_data(descriptor, peer);
415 /// Indicates that data was read from the given socket descriptor.
417 /// May return an Err to indicate that the connection should be closed.
419 /// Will *not* call back into send_data on any descriptors to avoid reentrancy complexity.
420 /// Thus, however, you almost certainly want to call process_events() after any read_event to
421 /// generate send_data calls to handle responses.
423 /// If Ok(true) is returned, further read_events should not be triggered until a write_event on
424 /// this file descriptor has resume_read set (preventing DoS issues in the send buffer).
426 /// Panics if the descriptor was not previously registered in a new_*_connection event.
427 pub fn read_event(&self, peer_descriptor: &mut Descriptor, data: Vec<u8>) -> Result<bool, PeerHandleError> {
428 match self.do_read_event(peer_descriptor, data) {
431 self.disconnect_event_internal(peer_descriptor, e.no_connection_possible);
437 fn do_read_event(&self, peer_descriptor: &mut Descriptor, data: Vec<u8>) -> Result<bool, PeerHandleError> {
439 let mut peers_lock = self.peers.lock().unwrap();
440 let peers = &mut *peers_lock;
441 let pause_read = match peers.peers.get_mut(peer_descriptor) {
442 None => panic!("Descriptor for read_event is not already known to PeerManager"),
444 assert!(peer.pending_read_buffer.len() > 0);
445 assert!(peer.pending_read_buffer.len() > peer.pending_read_buffer_pos);
447 let mut read_pos = 0;
448 while read_pos < data.len() {
450 let data_to_copy = cmp::min(peer.pending_read_buffer.len() - peer.pending_read_buffer_pos, data.len() - read_pos);
451 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]);
452 read_pos += data_to_copy;
453 peer.pending_read_buffer_pos += data_to_copy;
456 if peer.pending_read_buffer_pos == peer.pending_read_buffer.len() {
457 peer.pending_read_buffer_pos = 0;
459 macro_rules! encode_and_send_msg {
460 ($msg: expr, $msg_code: expr) => {
462 log_trace!(self, "Encoding and sending message of type {} to {}", $msg_code, log_pubkey!(peer.their_node_id.unwrap()));
463 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!($msg, $msg_code)[..]));
464 peers.peers_needing_send.insert(peer_descriptor.clone());
469 macro_rules! try_potential_handleerror {
475 msgs::ErrorAction::DisconnectPeer { msg: _ } => {
476 //TODO: Try to push msg
477 log_trace!(self, "Got Err handling message, disconnecting peer because {}", e.err);
478 return Err(PeerHandleError{ no_connection_possible: false });
480 msgs::ErrorAction::IgnoreError => {
481 log_trace!(self, "Got Err handling message, ignoring because {}", e.err);
484 msgs::ErrorAction::SendErrorMessage { msg } => {
485 log_trace!(self, "Got Err handling message, sending Error message because {}", e.err);
486 encode_and_send_msg!(msg, 17);
495 macro_rules! try_potential_decodeerror {
501 msgs::DecodeError::UnknownVersion => return Err(PeerHandleError{ no_connection_possible: false }),
502 msgs::DecodeError::UnknownRequiredFeature => {
503 log_debug!(self, "Got a channel/node announcement with an known required feature flag, you may want to update!");
506 msgs::DecodeError::InvalidValue => {
507 log_debug!(self, "Got an invalid value while deserializing message");
508 return Err(PeerHandleError{ no_connection_possible: false });
510 msgs::DecodeError::ShortRead => {
511 log_debug!(self, "Deserialization failed due to shortness of message");
512 return Err(PeerHandleError{ no_connection_possible: false });
514 msgs::DecodeError::ExtraAddressesPerType => {
515 log_debug!(self, "Error decoding message, ignoring due to lnd spec incompatibility. See https://github.com/lightningnetwork/lnd/issues/1407");
518 msgs::DecodeError::BadLengthDescriptor => return Err(PeerHandleError{ no_connection_possible: false }),
519 msgs::DecodeError::Io(_) => return Err(PeerHandleError{ no_connection_possible: false }),
526 macro_rules! insert_node_id {
528 match peers.node_id_to_descriptor.entry(peer.their_node_id.unwrap()) {
529 hash_map::Entry::Occupied(_) => {
530 log_trace!(self, "Got second connection with {}, closing", log_pubkey!(peer.their_node_id.unwrap()));
531 peer.their_node_id = None; // Unset so that we don't generate a peer_disconnected event
532 return Err(PeerHandleError{ no_connection_possible: false })
534 hash_map::Entry::Vacant(entry) => {
535 log_trace!(self, "Finished noise handshake for connection with {}", log_pubkey!(peer.their_node_id.unwrap()));
536 entry.insert(peer_descriptor.clone())
542 let next_step = peer.channel_encryptor.get_noise_step();
544 NextNoiseStep::ActOne => {
545 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();
546 peer.pending_outbound_buffer.push_back(act_two);
547 peer.pending_read_buffer = [0; 66].to_vec(); // act three is 66 bytes long
549 NextNoiseStep::ActTwo => {
550 let (act_three, their_node_id) = try_potential_handleerror!(peer.channel_encryptor.process_act_two(&peer.pending_read_buffer[..], &self.our_node_secret));
551 peer.pending_outbound_buffer.push_back(act_three.to_vec());
552 peer.pending_read_buffer = [0; 18].to_vec(); // Message length header is 18 bytes
553 peer.pending_read_is_header = true;
555 peer.their_node_id = Some(their_node_id);
557 let mut features = InitFeatures::supported();
558 if self.initial_syncs_sent.load(Ordering::Acquire) < INITIAL_SYNCS_TO_SEND {
559 self.initial_syncs_sent.fetch_add(1, Ordering::AcqRel);
560 features.set_initial_routing_sync();
562 encode_and_send_msg!(msgs::Init {
566 NextNoiseStep::ActThree => {
567 let their_node_id = try_potential_handleerror!(peer.channel_encryptor.process_act_three(&peer.pending_read_buffer[..]));
568 peer.pending_read_buffer = [0; 18].to_vec(); // Message length header is 18 bytes
569 peer.pending_read_is_header = true;
570 peer.their_node_id = Some(their_node_id);
573 NextNoiseStep::NoiseComplete => {
574 if peer.pending_read_is_header {
575 let msg_len = try_potential_handleerror!(peer.channel_encryptor.decrypt_length_header(&peer.pending_read_buffer[..]));
576 peer.pending_read_buffer = Vec::with_capacity(msg_len as usize + 16);
577 peer.pending_read_buffer.resize(msg_len as usize + 16, 0);
578 if msg_len < 2 { // Need at least the message type tag
579 return Err(PeerHandleError{ no_connection_possible: false });
581 peer.pending_read_is_header = false;
583 let msg_data = try_potential_handleerror!(peer.channel_encryptor.decrypt_message(&peer.pending_read_buffer[..]));
584 assert!(msg_data.len() >= 2);
587 peer.pending_read_buffer = [0; 18].to_vec();
588 peer.pending_read_is_header = true;
590 let msg_type = byte_utils::slice_to_be16(&msg_data[0..2]);
591 log_trace!(self, "Received message of type {} from {}", msg_type, log_pubkey!(peer.their_node_id.unwrap()));
592 if msg_type != 16 && peer.their_features.is_none() {
593 // Need an init message as first message
594 log_trace!(self, "Peer {} sent non-Init first message", log_pubkey!(peer.their_node_id.unwrap()));
595 return Err(PeerHandleError{ no_connection_possible: false });
597 let mut reader = ::std::io::Cursor::new(&msg_data[2..]);
599 // Connection control:
601 let msg = try_potential_decodeerror!(msgs::Init::read(&mut reader));
602 if msg.features.requires_unknown_bits() {
603 log_info!(self, "Peer global features required unknown version bits");
604 return Err(PeerHandleError{ no_connection_possible: true });
606 if msg.features.requires_unknown_bits() {
607 log_info!(self, "Peer local features required unknown version bits");
608 return Err(PeerHandleError{ no_connection_possible: true });
610 if peer.their_features.is_some() {
611 return Err(PeerHandleError{ no_connection_possible: false });
614 log_info!(self, "Received peer Init message: data_loss_protect: {}, initial_routing_sync: {}, upfront_shutdown_script: {}, unkown local flags: {}, unknown global flags: {}",
615 if msg.features.supports_data_loss_protect() { "supported" } else { "not supported"},
616 if msg.features.initial_routing_sync() { "requested" } else { "not requested" },
617 if msg.features.supports_upfront_shutdown_script() { "supported" } else { "not supported"},
618 if msg.features.supports_unknown_bits() { "present" } else { "none" },
619 if msg.features.supports_unknown_bits() { "present" } else { "none" });
621 if msg.features.initial_routing_sync() {
622 peer.sync_status = InitSyncTracker::ChannelsSyncing(0);
623 peers.peers_needing_send.insert(peer_descriptor.clone());
627 let mut features = InitFeatures::supported();
628 if self.initial_syncs_sent.load(Ordering::Acquire) < INITIAL_SYNCS_TO_SEND {
629 self.initial_syncs_sent.fetch_add(1, Ordering::AcqRel);
630 features.set_initial_routing_sync();
633 encode_and_send_msg!(msgs::Init {
638 self.message_handler.chan_handler.peer_connected(&peer.their_node_id.unwrap(), &msg);
639 peer.their_features = Some(msg.features);
642 let msg = try_potential_decodeerror!(msgs::ErrorMessage::read(&mut reader));
643 let mut data_is_printable = true;
644 for b in msg.data.bytes() {
645 if b < 32 || b > 126 {
646 data_is_printable = false;
651 if data_is_printable {
652 log_debug!(self, "Got Err message from {}: {}", log_pubkey!(peer.their_node_id.unwrap()), msg.data);
654 log_debug!(self, "Got Err message from {} with non-ASCII error message", log_pubkey!(peer.their_node_id.unwrap()));
656 self.message_handler.chan_handler.handle_error(&peer.their_node_id.unwrap(), &msg);
657 if msg.channel_id == [0; 32] {
658 return Err(PeerHandleError{ no_connection_possible: true });
663 let msg = try_potential_decodeerror!(msgs::Ping::read(&mut reader));
664 if msg.ponglen < 65532 {
665 let resp = msgs::Pong { byteslen: msg.ponglen };
666 encode_and_send_msg!(resp, 19);
670 peer.awaiting_pong = false;
671 try_potential_decodeerror!(msgs::Pong::read(&mut reader));
675 let msg = try_potential_decodeerror!(msgs::OpenChannel::read(&mut reader));
676 self.message_handler.chan_handler.handle_open_channel(&peer.their_node_id.unwrap(), peer.their_features.clone().unwrap(), &msg);
679 let msg = try_potential_decodeerror!(msgs::AcceptChannel::read(&mut reader));
680 self.message_handler.chan_handler.handle_accept_channel(&peer.their_node_id.unwrap(), peer.their_features.clone().unwrap(), &msg);
684 let msg = try_potential_decodeerror!(msgs::FundingCreated::read(&mut reader));
685 self.message_handler.chan_handler.handle_funding_created(&peer.their_node_id.unwrap(), &msg);
688 let msg = try_potential_decodeerror!(msgs::FundingSigned::read(&mut reader));
689 self.message_handler.chan_handler.handle_funding_signed(&peer.their_node_id.unwrap(), &msg);
692 let msg = try_potential_decodeerror!(msgs::FundingLocked::read(&mut reader));
693 self.message_handler.chan_handler.handle_funding_locked(&peer.their_node_id.unwrap(), &msg);
697 let msg = try_potential_decodeerror!(msgs::Shutdown::read(&mut reader));
698 self.message_handler.chan_handler.handle_shutdown(&peer.their_node_id.unwrap(), &msg);
701 let msg = try_potential_decodeerror!(msgs::ClosingSigned::read(&mut reader));
702 self.message_handler.chan_handler.handle_closing_signed(&peer.their_node_id.unwrap(), &msg);
706 let msg = try_potential_decodeerror!(msgs::UpdateAddHTLC::read(&mut reader));
707 self.message_handler.chan_handler.handle_update_add_htlc(&peer.their_node_id.unwrap(), &msg);
710 let msg = try_potential_decodeerror!(msgs::UpdateFulfillHTLC::read(&mut reader));
711 self.message_handler.chan_handler.handle_update_fulfill_htlc(&peer.their_node_id.unwrap(), &msg);
714 let msg = try_potential_decodeerror!(msgs::UpdateFailHTLC::read(&mut reader));
715 self.message_handler.chan_handler.handle_update_fail_htlc(&peer.their_node_id.unwrap(), &msg);
718 let msg = try_potential_decodeerror!(msgs::UpdateFailMalformedHTLC::read(&mut reader));
719 self.message_handler.chan_handler.handle_update_fail_malformed_htlc(&peer.their_node_id.unwrap(), &msg);
723 let msg = try_potential_decodeerror!(msgs::CommitmentSigned::read(&mut reader));
724 self.message_handler.chan_handler.handle_commitment_signed(&peer.their_node_id.unwrap(), &msg);
727 let msg = try_potential_decodeerror!(msgs::RevokeAndACK::read(&mut reader));
728 self.message_handler.chan_handler.handle_revoke_and_ack(&peer.their_node_id.unwrap(), &msg);
731 let msg = try_potential_decodeerror!(msgs::UpdateFee::read(&mut reader));
732 self.message_handler.chan_handler.handle_update_fee(&peer.their_node_id.unwrap(), &msg);
735 let msg = try_potential_decodeerror!(msgs::ChannelReestablish::read(&mut reader));
736 self.message_handler.chan_handler.handle_channel_reestablish(&peer.their_node_id.unwrap(), &msg);
741 let msg = try_potential_decodeerror!(msgs::AnnouncementSignatures::read(&mut reader));
742 self.message_handler.chan_handler.handle_announcement_signatures(&peer.their_node_id.unwrap(), &msg);
745 let msg = try_potential_decodeerror!(msgs::ChannelAnnouncement::read(&mut reader));
746 let should_forward = try_potential_handleerror!(self.message_handler.route_handler.handle_channel_announcement(&msg));
749 // TODO: forward msg along to all our other peers!
753 let msg = try_potential_decodeerror!(msgs::NodeAnnouncement::read(&mut reader));
754 let should_forward = try_potential_handleerror!(self.message_handler.route_handler.handle_node_announcement(&msg));
757 // TODO: forward msg along to all our other peers!
761 let msg = try_potential_decodeerror!(msgs::ChannelUpdate::read(&mut reader));
762 let should_forward = try_potential_handleerror!(self.message_handler.route_handler.handle_channel_update(&msg));
765 // TODO: forward msg along to all our other peers!
769 if (msg_type & 1) == 0 {
770 return Err(PeerHandleError{ no_connection_possible: true });
780 self.do_attempt_write_data(peer_descriptor, peer);
782 peer.pending_outbound_buffer.len() > 10 // pause_read
792 /// Checks for any events generated by our handlers and processes them. Includes sending most
793 /// response messages as well as messages generated by calls to handler functions directly (eg
794 /// functions like ChannelManager::process_pending_htlc_forward or send_payment).
795 pub fn process_events(&self) {
797 // TODO: There are some DoS attacks here where you can flood someone's outbound send
798 // buffer by doing things like announcing channels on another node. We should be willing to
799 // drop optional-ish messages when send buffers get full!
801 let mut events_generated = self.message_handler.chan_handler.get_and_clear_pending_msg_events();
802 let mut peers_lock = self.peers.lock().unwrap();
803 let peers = &mut *peers_lock;
804 for event in events_generated.drain(..) {
805 macro_rules! get_peer_for_forwarding {
806 ($node_id: expr, $handle_no_such_peer: block) => {
808 let descriptor = match peers.node_id_to_descriptor.get($node_id) {
809 Some(descriptor) => descriptor.clone(),
811 $handle_no_such_peer;
815 match peers.peers.get_mut(&descriptor) {
817 if peer.their_features.is_none() {
818 $handle_no_such_peer;
823 None => panic!("Inconsistent peers set state!"),
829 MessageSendEvent::SendAcceptChannel { ref node_id, ref msg } => {
830 log_trace!(self, "Handling SendAcceptChannel event in peer_handler for node {} for channel {}",
831 log_pubkey!(node_id),
832 log_bytes!(msg.temporary_channel_id));
833 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
834 //TODO: Drop the pending channel? (or just let it timeout, but that sucks)
836 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 33)));
837 self.do_attempt_write_data(&mut descriptor, peer);
839 MessageSendEvent::SendOpenChannel { ref node_id, ref msg } => {
840 log_trace!(self, "Handling SendOpenChannel event in peer_handler for node {} for channel {}",
841 log_pubkey!(node_id),
842 log_bytes!(msg.temporary_channel_id));
843 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
844 //TODO: Drop the pending channel? (or just let it timeout, but that sucks)
846 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 32)));
847 self.do_attempt_write_data(&mut descriptor, peer);
849 MessageSendEvent::SendFundingCreated { ref node_id, ref msg } => {
850 log_trace!(self, "Handling SendFundingCreated event in peer_handler for node {} for channel {} (which becomes {})",
851 log_pubkey!(node_id),
852 log_bytes!(msg.temporary_channel_id),
853 log_funding_channel_id!(msg.funding_txid, msg.funding_output_index));
854 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
855 //TODO: generate a DiscardFunding event indicating to the wallet that
856 //they should just throw away this funding transaction
858 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 34)));
859 self.do_attempt_write_data(&mut descriptor, peer);
861 MessageSendEvent::SendFundingSigned { ref node_id, ref msg } => {
862 log_trace!(self, "Handling SendFundingSigned event in peer_handler for node {} for channel {}",
863 log_pubkey!(node_id),
864 log_bytes!(msg.channel_id));
865 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
866 //TODO: generate a DiscardFunding event indicating to the wallet that
867 //they should just throw away this funding transaction
869 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 35)));
870 self.do_attempt_write_data(&mut descriptor, peer);
872 MessageSendEvent::SendFundingLocked { ref node_id, ref msg } => {
873 log_trace!(self, "Handling SendFundingLocked event in peer_handler for node {} for channel {}",
874 log_pubkey!(node_id),
875 log_bytes!(msg.channel_id));
876 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
877 //TODO: Do whatever we're gonna do for handling dropped messages
879 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 36)));
880 self.do_attempt_write_data(&mut descriptor, peer);
882 MessageSendEvent::SendAnnouncementSignatures { ref node_id, ref msg } => {
883 log_trace!(self, "Handling SendAnnouncementSignatures event in peer_handler for node {} for channel {})",
884 log_pubkey!(node_id),
885 log_bytes!(msg.channel_id));
886 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
887 //TODO: generate a DiscardFunding event indicating to the wallet that
888 //they should just throw away this funding transaction
890 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 259)));
891 self.do_attempt_write_data(&mut descriptor, peer);
893 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 } } => {
894 log_trace!(self, "Handling UpdateHTLCs event in peer_handler for node {} with {} adds, {} fulfills, {} fails for channel {}",
895 log_pubkey!(node_id),
896 update_add_htlcs.len(),
897 update_fulfill_htlcs.len(),
898 update_fail_htlcs.len(),
899 log_bytes!(commitment_signed.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 for msg in update_add_htlcs {
904 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 128)));
906 for msg in update_fulfill_htlcs {
907 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 130)));
909 for msg in update_fail_htlcs {
910 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 131)));
912 for msg in update_fail_malformed_htlcs {
913 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 135)));
915 if let &Some(ref msg) = update_fee {
916 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 134)));
918 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(commitment_signed, 132)));
919 self.do_attempt_write_data(&mut descriptor, peer);
921 MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
922 log_trace!(self, "Handling SendRevokeAndACK event in peer_handler for node {} for channel {}",
923 log_pubkey!(node_id),
924 log_bytes!(msg.channel_id));
925 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
926 //TODO: Do whatever we're gonna do for handling dropped messages
928 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 133)));
929 self.do_attempt_write_data(&mut descriptor, peer);
931 MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
932 log_trace!(self, "Handling SendClosingSigned event in peer_handler for node {} for channel {}",
933 log_pubkey!(node_id),
934 log_bytes!(msg.channel_id));
935 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
936 //TODO: Do whatever we're gonna do for handling dropped messages
938 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 39)));
939 self.do_attempt_write_data(&mut descriptor, peer);
941 MessageSendEvent::SendShutdown { ref node_id, ref msg } => {
942 log_trace!(self, "Handling Shutdown event in peer_handler for node {} for channel {}",
943 log_pubkey!(node_id),
944 log_bytes!(msg.channel_id));
945 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
946 //TODO: Do whatever we're gonna do for handling dropped messages
948 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 38)));
949 self.do_attempt_write_data(&mut descriptor, peer);
951 MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
952 log_trace!(self, "Handling SendChannelReestablish event in peer_handler for node {} for channel {}",
953 log_pubkey!(node_id),
954 log_bytes!(msg.channel_id));
955 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
956 //TODO: Do whatever we're gonna do for handling dropped messages
958 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 136)));
959 self.do_attempt_write_data(&mut descriptor, peer);
961 MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
962 log_trace!(self, "Handling BroadcastChannelAnnouncement event in peer_handler for short channel id {}", msg.contents.short_channel_id);
963 if self.message_handler.route_handler.handle_channel_announcement(msg).is_ok() && self.message_handler.route_handler.handle_channel_update(update_msg).is_ok() {
964 let encoded_msg = encode_msg!(msg, 256);
965 let encoded_update_msg = encode_msg!(update_msg, 258);
967 for (ref descriptor, ref mut peer) in peers.peers.iter_mut() {
968 if !peer.channel_encryptor.is_ready_for_encryption() || peer.their_features.is_none() ||
969 !peer.should_forward_channel(msg.contents.short_channel_id) {
972 match peer.their_node_id {
974 Some(their_node_id) => {
975 if their_node_id == msg.contents.node_id_1 || their_node_id == msg.contents.node_id_2 {
980 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_msg[..]));
981 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_update_msg[..]));
982 self.do_attempt_write_data(&mut (*descriptor).clone(), peer);
986 MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
987 log_trace!(self, "Handling BroadcastChannelUpdate event in peer_handler for short channel id {}", msg.contents.short_channel_id);
988 if self.message_handler.route_handler.handle_channel_update(msg).is_ok() {
989 let encoded_msg = encode_msg!(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 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_msg[..]));
997 self.do_attempt_write_data(&mut (*descriptor).clone(), peer);
1001 MessageSendEvent::PaymentFailureNetworkUpdate { ref update } => {
1002 self.message_handler.route_handler.handle_htlc_fail_channel_update(update);
1004 MessageSendEvent::HandleError { ref node_id, ref action } => {
1006 msgs::ErrorAction::DisconnectPeer { ref msg } => {
1007 if let Some(mut descriptor) = peers.node_id_to_descriptor.remove(node_id) {
1008 peers.peers_needing_send.remove(&descriptor);
1009 if let Some(mut peer) = peers.peers.remove(&descriptor) {
1010 if let Some(ref msg) = *msg {
1011 log_trace!(self, "Handling DisconnectPeer HandleError event in peer_handler for node {} with message {}",
1012 log_pubkey!(node_id),
1014 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 17)));
1015 // This isn't guaranteed to work, but if there is enough free
1016 // room in the send buffer, put the error message there...
1017 self.do_attempt_write_data(&mut descriptor, &mut peer);
1019 log_trace!(self, "Handling DisconnectPeer HandleError event in peer_handler for node {} with no message", log_pubkey!(node_id));
1022 descriptor.disconnect_socket();
1023 self.message_handler.chan_handler.peer_disconnected(&node_id, false);
1026 msgs::ErrorAction::IgnoreError => {},
1027 msgs::ErrorAction::SendErrorMessage { ref msg } => {
1028 log_trace!(self, "Handling SendErrorMessage HandleError event in peer_handler for node {} with message {}",
1029 log_pubkey!(node_id),
1031 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
1032 //TODO: Do whatever we're gonna do for handling dropped messages
1034 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 17)));
1035 self.do_attempt_write_data(&mut descriptor, peer);
1042 for mut descriptor in peers.peers_needing_send.drain() {
1043 match peers.peers.get_mut(&descriptor) {
1044 Some(peer) => self.do_attempt_write_data(&mut descriptor, peer),
1045 None => panic!("Inconsistent peers set state!"),
1051 /// Indicates that the given socket descriptor's connection is now closed.
1053 /// This must be called even if a PeerHandleError was given for a read_event or write_event,
1054 /// but must NOT be called if a PeerHandleError was provided out of a new_\*\_connection event!
1056 /// Panics if the descriptor was not previously registered in a successful new_*_connection event.
1057 pub fn disconnect_event(&self, descriptor: &Descriptor) {
1058 self.disconnect_event_internal(descriptor, false);
1061 fn disconnect_event_internal(&self, descriptor: &Descriptor, no_connection_possible: bool) {
1062 let mut peers = self.peers.lock().unwrap();
1063 peers.peers_needing_send.remove(descriptor);
1064 let peer_option = peers.peers.remove(descriptor);
1066 None => panic!("Descriptor for disconnect_event is not already known to PeerManager"),
1068 match peer.their_node_id {
1070 peers.node_id_to_descriptor.remove(&node_id);
1071 self.message_handler.chan_handler.peer_disconnected(&node_id, no_connection_possible);
1079 /// This function should be called roughly once every 30 seconds.
1080 /// It will send pings to each peer and disconnect those which did not respond to the last round of pings.
1082 /// Will most likely call send_data on all of the registered descriptors, thus, be very careful with reentrancy issues!
1083 pub fn timer_tick_occured(&self) {
1084 let mut peers_lock = self.peers.lock().unwrap();
1086 let peers = &mut *peers_lock;
1087 let peers_needing_send = &mut peers.peers_needing_send;
1088 let node_id_to_descriptor = &mut peers.node_id_to_descriptor;
1089 let peers = &mut peers.peers;
1091 peers.retain(|descriptor, peer| {
1092 if peer.awaiting_pong == true {
1093 peers_needing_send.remove(descriptor);
1094 match peer.their_node_id {
1096 node_id_to_descriptor.remove(&node_id);
1097 self.message_handler.chan_handler.peer_disconnected(&node_id, true);
1103 let ping = msgs::Ping {
1107 peer.pending_outbound_buffer.push_back(encode_msg!(ping, 18));
1108 let mut descriptor_clone = descriptor.clone();
1109 self.do_attempt_write_data(&mut descriptor_clone, peer);
1111 if peer.awaiting_pong {
1112 false // Drop the peer
1114 peer.awaiting_pong = true;
1124 use ln::peer_handler::{PeerManager, MessageHandler, SocketDescriptor};
1127 use util::test_utils;
1128 use util::logger::Logger;
1130 use secp256k1::Secp256k1;
1131 use secp256k1::key::{SecretKey, PublicKey};
1133 use rand::{thread_rng, Rng};
1135 use std::sync::{Arc};
1137 #[derive(PartialEq, Eq, Clone, Hash)]
1138 struct FileDescriptor {
1142 impl SocketDescriptor for FileDescriptor {
1143 fn send_data(&mut self, data: &[u8], _resume_read: bool) -> usize {
1147 fn disconnect_socket(&mut self) {}
1150 fn create_network(peer_count: usize) -> Vec<PeerManager<FileDescriptor>> {
1151 let mut peers = Vec::new();
1152 let mut rng = thread_rng();
1153 let logger : Arc<Logger> = Arc::new(test_utils::TestLogger::new());
1154 let mut ephemeral_bytes = [0; 32];
1155 rng.fill_bytes(&mut ephemeral_bytes);
1157 for _ in 0..peer_count {
1158 let chan_handler = test_utils::TestChannelMessageHandler::new();
1159 let router = test_utils::TestRoutingMessageHandler::new();
1161 let mut key_slice = [0;32];
1162 rng.fill_bytes(&mut key_slice);
1163 SecretKey::from_slice(&key_slice).unwrap()
1165 let msg_handler = MessageHandler { chan_handler: Arc::new(chan_handler), route_handler: Arc::new(router) };
1166 let peer = PeerManager::new(msg_handler, node_id, &ephemeral_bytes, Arc::clone(&logger));
1173 fn establish_connection(peer_a: &PeerManager<FileDescriptor>, peer_b: &PeerManager<FileDescriptor>) {
1174 let secp_ctx = Secp256k1::new();
1175 let their_id = PublicKey::from_secret_key(&secp_ctx, &peer_b.our_node_secret);
1176 let fd = FileDescriptor { fd: 1};
1177 peer_a.new_inbound_connection(fd.clone()).unwrap();
1178 peer_a.peers.lock().unwrap().node_id_to_descriptor.insert(their_id, fd.clone());
1182 fn test_disconnect_peer() {
1183 // Simple test which builds a network of PeerManager, connects and brings them to NoiseState::Finished and
1184 // push a DisconnectPeer event to remove the node flagged by id
1185 let mut peers = create_network(2);
1186 establish_connection(&peers[0], &peers[1]);
1187 assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1);
1189 let secp_ctx = Secp256k1::new();
1190 let their_id = PublicKey::from_secret_key(&secp_ctx, &peers[1].our_node_secret);
1192 let chan_handler = test_utils::TestChannelMessageHandler::new();
1193 chan_handler.pending_events.lock().unwrap().push(events::MessageSendEvent::HandleError {
1195 action: msgs::ErrorAction::DisconnectPeer { msg: None },
1197 assert_eq!(chan_handler.pending_events.lock().unwrap().len(), 1);
1198 peers[0].message_handler.chan_handler = Arc::new(chan_handler);
1200 peers[0].process_events();
1201 assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 0);
1204 fn test_timer_tick_occured(){
1205 // Create peers, a vector of two peer managers, perform initial set up and check that peers[0] has one Peer.
1206 let peers = create_network(2);
1207 establish_connection(&peers[0], &peers[1]);
1208 assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1);
1210 // peers[0] awaiting_pong is set to true, but the Peer is still connected
1211 peers[0].timer_tick_occured();
1212 assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1);
1214 // Since timer_tick_occured() is called again when awaiting_pong is true, all Peers are disconnected
1215 peers[0].timer_tick_occured();
1216 assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 0);