1 use secp256k1::key::{SecretKey,PublicKey};
4 use ln::msgs::{MsgEncodable,MsgDecodable};
5 use ln::peer_channel_encryptor::{PeerChannelEncryptor,NextNoiseStep};
7 use util::events::{EventsProvider,Event};
9 use std::collections::{HashMap,LinkedList};
10 use std::sync::{Arc, Mutex};
11 use std::{cmp,mem,hash,fmt};
13 pub struct MessageHandler {
14 pub chan_handler: Arc<msgs::ChannelMessageHandler>,
15 pub route_handler: Arc<msgs::RoutingMessageHandler>,
18 /// Provides an object which can be used to send data to and which uniquely identifies a connection
19 /// to a remote host. You will need to be able to generate multiple of these which meet Eq and
20 /// implement Hash to meet the PeerManager API.
21 /// For efficiency, Clone should be relatively cheap for this type.
22 /// You probably want to just extend an int and put a file descriptor in a struct and implement
24 pub trait SocketDescriptor : cmp::Eq + hash::Hash + Clone {
25 /// Attempts to send some data from the given Vec starting at the given offset to the peer.
26 /// Returns the amount of data which was sent, possibly 0 if the socket has since disconnected.
27 /// Note that in the disconnected case, a disconnect_event must still fire and further write
28 /// attempts may occur until that time.
29 /// If the returned size is smaller than data.len() - write_offset, a write_available event must
30 /// trigger the next time more data can be written. Additionally, until the a send_data event
31 /// completes fully, no further read_events should trigger on the same peer!
32 /// If a read_event on this descriptor had previously returned true (indicating that read
33 /// events should be paused to prevent DoS in the send buffer), resume_read may be set
34 /// indicating that read events on this descriptor should resume. A resume_read of false does
35 /// *not* imply that further read events should be paused.
36 fn send_data(&mut self, data: &Vec<u8>, write_offset: usize, resume_read: bool) -> usize;
39 /// Error for PeerManager errors. If you get one of these, you must disconnect the socket and
40 /// generate no further read/write_events for the descriptor, only triggering a single
41 /// disconnect_event (unless it was provided in response to a new_*_connection event, in which case
42 /// no such disconnect_event must be generated and the socket be silently disconencted).
43 pub struct PeerHandleError {}
44 impl fmt::Debug for PeerHandleError {
45 fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
46 formatter.write_str("Peer Send Invalid Data")
51 channel_encryptor: PeerChannelEncryptor,
52 their_node_id: Option<PublicKey>,
54 pending_outbound_buffer: LinkedList<Vec<u8>>,
55 pending_outbound_buffer_first_msg_offset: usize,
56 awaiting_write_event: bool,
58 pending_read_buffer: Vec<u8>,
59 pending_read_buffer_pos: usize,
60 pending_read_is_header: bool,
63 struct PeerHolder<Descriptor: SocketDescriptor> {
64 peers: HashMap<Descriptor, Peer>,
65 /// Only add to this set when noise completes:
66 node_id_to_descriptor: HashMap<PublicKey, Descriptor>,
69 pub struct PeerManager<Descriptor: SocketDescriptor> {
70 message_handler: MessageHandler,
71 peers: Mutex<PeerHolder<Descriptor>>,
72 pending_events: Mutex<Vec<Event>>,
73 our_node_secret: SecretKey,
77 macro_rules! encode_msg {
78 ($msg: expr, $msg_code: expr) => {
80 let just_msg = $msg.encode();
81 let mut encoded_msg = Vec::with_capacity(just_msg.len() + 2);
82 encoded_msg.extend_from_slice(&byte_utils::be16_to_array($msg_code));
83 encoded_msg.extend_from_slice(&just_msg[..]);
89 /// Manages and reacts to connection events. You probably want to use file descriptors as PeerIds.
90 /// PeerIds may repeat, but only after disconnect_event() has been called.
91 impl<Descriptor: SocketDescriptor> PeerManager<Descriptor> {
92 pub fn new(message_handler: MessageHandler, our_node_secret: SecretKey) -> PeerManager<Descriptor> {
94 message_handler: message_handler,
95 peers: Mutex::new(PeerHolder { peers: HashMap::new(), node_id_to_descriptor: HashMap::new() }),
96 pending_events: Mutex::new(Vec::new()),
97 our_node_secret: our_node_secret,
101 /// Indicates a new outbound connection has been established to a node with the given node_id.
102 /// Note that if an Err is returned here you MUST NOT call disconnect_event for the new
103 /// descriptor but must disconnect the connection immediately.
104 /// Returns some bytes to send to the remote node.
105 /// Panics if descriptor is duplicative with some other descriptor which has not yet has a
106 /// disconnect_event.
107 pub fn new_outbound_connection(&self, their_node_id: PublicKey, descriptor: Descriptor) -> Result<Vec<u8>, PeerHandleError> {
108 let mut peer_encryptor = PeerChannelEncryptor::new_outbound(their_node_id.clone());
109 let res = peer_encryptor.get_act_one().to_vec();
110 let pending_read_buffer = [0; 50].to_vec(); // Noise act two is 50 bytes
112 let mut peers = self.peers.lock().unwrap();
113 if peers.peers.insert(descriptor, Peer {
114 channel_encryptor: peer_encryptor,
115 their_node_id: Some(their_node_id),
117 pending_outbound_buffer: LinkedList::new(),
118 pending_outbound_buffer_first_msg_offset: 0,
119 awaiting_write_event: false,
121 pending_read_buffer: pending_read_buffer,
122 pending_read_buffer_pos: 0,
123 pending_read_is_header: false,
125 panic!("PeerManager driver duplicated descriptors!");
130 /// Indicates a new inbound connection has been established.
131 /// May refuse the connection by returning an Err, but will never write bytes to the remote end
132 /// (outbound connector always speaks first). Note that if an Err is returned here you MUST NOT
133 /// call disconnect_event for the new descriptor but must disconnect the connection
135 /// Panics if descriptor is duplicative with some other descriptor which has not yet has a
136 /// disconnect_event.
137 pub fn new_inbound_connection(&self, descriptor: Descriptor) -> Result<(), PeerHandleError> {
138 let peer_encryptor = PeerChannelEncryptor::new_inbound(&self.our_node_secret);
139 let pending_read_buffer = [0; 50].to_vec(); // Noise act one is 50 bytes
141 let mut peers = self.peers.lock().unwrap();
142 if peers.peers.insert(descriptor, Peer {
143 channel_encryptor: peer_encryptor,
146 pending_outbound_buffer: LinkedList::new(),
147 pending_outbound_buffer_first_msg_offset: 0,
148 awaiting_write_event: false,
150 pending_read_buffer: pending_read_buffer,
151 pending_read_buffer_pos: 0,
152 pending_read_is_header: false,
154 panic!("PeerManager driver duplicated descriptors!");
159 fn do_attempt_write_data(descriptor: &mut Descriptor, peer: &mut Peer) {
160 while !peer.awaiting_write_event {
162 let next_buff = match peer.pending_outbound_buffer.front() {
166 let should_be_reading = peer.pending_outbound_buffer.len() < 10;
168 let data_sent = descriptor.send_data(next_buff, peer.pending_outbound_buffer_first_msg_offset, should_be_reading);
169 peer.pending_outbound_buffer_first_msg_offset += data_sent;
170 if peer.pending_outbound_buffer_first_msg_offset == next_buff.len() { true } else { false }
172 peer.pending_outbound_buffer_first_msg_offset = 0;
173 peer.pending_outbound_buffer.pop_front();
175 peer.awaiting_write_event = true;
180 /// Indicates that there is room to write data to the given socket descriptor.
181 /// May return an Err to indicate that the connection should be closed.
182 /// Will most likely call send_data on the descriptor passed in (or the descriptor handed into
183 /// new_*_connection) before returning. Thus, be very careful with reentrancy issues! The
184 /// invariants around calling write_event in case a write did not fully complete must still
185 /// hold - be ready to call write_event again if a write call generated here isn't sufficient!
186 /// Panics if the descriptor was not previously registered in a new_*_connection event.
187 pub fn write_event(&self, descriptor: &mut Descriptor) -> Result<(), PeerHandleError> {
188 let mut peers = self.peers.lock().unwrap();
189 match peers.peers.get_mut(descriptor) {
190 None => panic!("Descriptor for write_event is not already known to PeerManager"),
192 peer.awaiting_write_event = false;
193 Self::do_attempt_write_data(descriptor, peer);
199 /// Indicates that data was read from the given socket descriptor.
200 /// May return an Err to indicate that the connection should be closed.
201 /// Will very likely call send_data on the descriptor passed in (or a descriptor handed into
202 /// new_*_connection) before returning. Thus, be very careful with reentrancy issues! The
203 /// invariants around calling write_event in case a write did not fully complete must still
204 /// hold. Note that this function will often call send_data on many peers before returning, not
206 /// If Ok(true) is returned, further read_events should not be triggered until a write_event on
207 /// this file descriptor has resume_read set (preventing DoS issues in the send buffer). Note
208 /// that this must be true even if a send_data call with resume_read=true was made during the
209 /// course of this function!
210 /// Panics if the descriptor was not previously registered in a new_*_connection event.
211 pub fn read_event(&self, peer_descriptor: &mut Descriptor, data: Vec<u8>) -> Result<bool, PeerHandleError> {
212 match self.do_read_event(peer_descriptor, data) {
215 self.disconnect_event(peer_descriptor);
221 fn do_read_event(&self, peer_descriptor: &mut Descriptor, data: Vec<u8>) -> Result<bool, PeerHandleError> {
223 let mut peers = self.peers.lock().unwrap();
224 let (should_insert_node_id, pause_read) = match peers.peers.get_mut(peer_descriptor) {
225 None => panic!("Descriptor for read_event is not already known to PeerManager"),
227 assert!(peer.pending_read_buffer.len() > 0);
228 assert!(peer.pending_read_buffer.len() > peer.pending_read_buffer_pos);
230 macro_rules! try_potential_handleerror {
235 //TODO: Handle e appropriately!
236 return Err(PeerHandleError{});
242 macro_rules! try_potential_decodeerror {
248 return Err(PeerHandleError{});
254 macro_rules! encode_and_send_msg {
255 ($msg: expr, $msg_code: expr) => {
256 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!($msg, $msg_code)[..]));
260 let mut insert_node_id = None;
262 let mut read_pos = 0;
263 while read_pos < data.len() {
265 let data_to_copy = cmp::min(peer.pending_read_buffer.len() - peer.pending_read_buffer_pos, data.len() - read_pos);
266 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]);
267 read_pos += data_to_copy;
268 peer.pending_read_buffer_pos += data_to_copy;
270 if peer.pending_read_buffer_pos == peer.pending_read_buffer.len() {
271 let next_step = peer.channel_encryptor.get_noise_step();
273 NextNoiseStep::ActOne => {
274 let act_two = try_potential_handleerror!(peer.channel_encryptor.process_act_one_with_key(&peer.pending_read_buffer[..], &self.our_node_secret)).to_vec();
275 peer.pending_outbound_buffer.push_back(act_two);
276 peer.pending_read_buffer = [0; 66].to_vec(); // act three is 66 bytes long
278 NextNoiseStep::ActTwo => {
279 let act_three = try_potential_handleerror!(peer.channel_encryptor.process_act_two(&peer.pending_read_buffer[..], &self.our_node_secret)).to_vec();
280 peer.pending_outbound_buffer.push_back(act_three);
281 peer.pending_read_buffer = [0; 18].to_vec(); // Message length header is 18 bytes
282 peer.pending_read_is_header = true;
284 insert_node_id = Some(peer.their_node_id.unwrap());
285 encode_and_send_msg!(msgs::Init {
286 global_features: msgs::GlobalFeatures::new(),
287 local_features: msgs::LocalFeatures::new(),
290 NextNoiseStep::ActThree => {
291 let their_node_id = try_potential_handleerror!(peer.channel_encryptor.process_act_three(&peer.pending_read_buffer[..]));
292 peer.pending_read_buffer = [0; 18].to_vec(); // Message length header is 18 bytes
293 peer.pending_read_is_header = true;
294 peer.their_node_id = Some(their_node_id);
295 insert_node_id = Some(peer.their_node_id.unwrap());
297 NextNoiseStep::NoiseComplete => {
298 if peer.pending_read_is_header {
299 let msg_len = try_potential_handleerror!(peer.channel_encryptor.decrypt_length_header(&peer.pending_read_buffer[..]));
300 peer.pending_read_buffer = Vec::with_capacity(msg_len as usize + 16);
301 peer.pending_read_buffer.resize(msg_len as usize + 16, 0);
302 if msg_len < 2 { // Need at least the message type tag
303 return Err(PeerHandleError{});
305 peer.pending_read_is_header = false;
307 let msg_data = try_potential_handleerror!(peer.channel_encryptor.decrypt_message(&peer.pending_read_buffer[..]));
308 assert!(msg_data.len() >= 2);
310 let msg_type = byte_utils::slice_to_be16(&msg_data[0..2]);
312 // Connection control:
314 let msg = try_potential_decodeerror!(msgs::Init::decode(&msg_data[2..]));
315 if msg.global_features.requires_unknown_bits() {
316 return Err(PeerHandleError{});
318 if msg.local_features.requires_unknown_bits() {
319 return Err(PeerHandleError{});
321 //TODO: Store features (and check that we've
322 //received Init prior to any other messages)!
323 //TODO: Respond to Init with Init if we're inbound.
333 let msg = try_potential_decodeerror!(msgs::OpenChannel::decode(&msg_data[2..]));
334 let resp = try_potential_handleerror!(self.message_handler.chan_handler.handle_open_channel(&peer.their_node_id.unwrap(), &msg));
335 encode_and_send_msg!(resp, 33);
338 let msg = try_potential_decodeerror!(msgs::AcceptChannel::decode(&msg_data[2..]));
339 try_potential_handleerror!(self.message_handler.chan_handler.handle_accept_channel(&peer.their_node_id.unwrap(), &msg));
343 let msg = try_potential_decodeerror!(msgs::FundingCreated::decode(&msg_data[2..]));
344 let resp = try_potential_handleerror!(self.message_handler.chan_handler.handle_funding_created(&peer.their_node_id.unwrap(), &msg));
345 encode_and_send_msg!(resp, 35);
348 let msg = try_potential_decodeerror!(msgs::FundingSigned::decode(&msg_data[2..]));
349 try_potential_handleerror!(self.message_handler.chan_handler.handle_funding_signed(&peer.their_node_id.unwrap(), &msg));
352 let msg = try_potential_decodeerror!(msgs::FundingLocked::decode(&msg_data[2..]));
353 let resp_option = try_potential_handleerror!(self.message_handler.chan_handler.handle_funding_locked(&peer.their_node_id.unwrap(), &msg));
355 Some(resp) => encode_and_send_msg!(resp, 259),
361 let msg = try_potential_decodeerror!(msgs::Shutdown::decode(&msg_data[2..]));
362 let resp_options = try_potential_handleerror!(self.message_handler.chan_handler.handle_shutdown(&peer.their_node_id.unwrap(), &msg));
363 if let Some(resp) = resp_options.0 {
364 encode_and_send_msg!(resp, 38);
366 if let Some(resp) = resp_options.1 {
367 encode_and_send_msg!(resp, 39);
371 let msg = try_potential_decodeerror!(msgs::ClosingSigned::decode(&msg_data[2..]));
372 let resp_option = try_potential_handleerror!(self.message_handler.chan_handler.handle_closing_signed(&peer.their_node_id.unwrap(), &msg));
373 if let Some(resp) = resp_option {
374 encode_and_send_msg!(resp, 39);
379 let msg = try_potential_decodeerror!(msgs::UpdateAddHTLC::decode(&msg_data[2..]));
380 try_potential_handleerror!(self.message_handler.chan_handler.handle_update_add_htlc(&peer.their_node_id.unwrap(), &msg));
383 let msg = try_potential_decodeerror!(msgs::UpdateFulfillHTLC::decode(&msg_data[2..]));
384 try_potential_handleerror!(self.message_handler.chan_handler.handle_update_fulfill_htlc(&peer.their_node_id.unwrap(), &msg));
387 let msg = try_potential_decodeerror!(msgs::UpdateFailHTLC::decode(&msg_data[2..]));
388 try_potential_handleerror!(self.message_handler.chan_handler.handle_update_fail_htlc(&peer.their_node_id.unwrap(), &msg));
391 let msg = try_potential_decodeerror!(msgs::UpdateFailMalformedHTLC::decode(&msg_data[2..]));
392 try_potential_handleerror!(self.message_handler.chan_handler.handle_update_fail_malformed_htlc(&peer.their_node_id.unwrap(), &msg));
396 let msg = try_potential_decodeerror!(msgs::CommitmentSigned::decode(&msg_data[2..]));
397 let resp = try_potential_handleerror!(self.message_handler.chan_handler.handle_commitment_signed(&peer.their_node_id.unwrap(), &msg));
398 encode_and_send_msg!(resp, 133);
401 let msg = try_potential_decodeerror!(msgs::RevokeAndACK::decode(&msg_data[2..]));
402 let resp_option = try_potential_handleerror!(self.message_handler.chan_handler.handle_revoke_and_ack(&peer.their_node_id.unwrap(), &msg));
405 for resp in resps.0 {
406 encode_and_send_msg!(resp, 128);
408 encode_and_send_msg!(resps.1, 132);
414 let msg = try_potential_decodeerror!(msgs::UpdateFee::decode(&msg_data[2..]));
415 try_potential_handleerror!(self.message_handler.chan_handler.handle_update_fee(&peer.their_node_id.unwrap(), &msg));
417 136 => { }, // TODO: channel_reestablish
421 let msg = try_potential_decodeerror!(msgs::AnnouncementSignatures::decode(&msg_data[2..]));
422 try_potential_handleerror!(self.message_handler.chan_handler.handle_announcement_signatures(&peer.their_node_id.unwrap(), &msg));
425 let msg = try_potential_decodeerror!(msgs::ChannelAnnouncement::decode(&msg_data[2..]));
426 let should_forward = try_potential_handleerror!(self.message_handler.route_handler.handle_channel_announcement(&msg));
429 // TODO: forward msg along to all our other peers!
433 let msg = try_potential_decodeerror!(msgs::NodeAnnouncement::decode(&msg_data[2..]));
434 try_potential_handleerror!(self.message_handler.route_handler.handle_node_announcement(&msg));
437 let msg = try_potential_decodeerror!(msgs::ChannelUpdate::decode(&msg_data[2..]));
438 try_potential_handleerror!(self.message_handler.route_handler.handle_channel_update(&msg));
441 if (msg_type & 1) == 0 {
442 //TODO: Fail all channels. Kill the peer!
443 return Err(PeerHandleError{});
448 peer.pending_read_buffer = [0; 18].to_vec();
449 peer.pending_read_is_header = true;
453 peer.pending_read_buffer_pos = 0;
457 Self::do_attempt_write_data(peer_descriptor, peer);
459 (insert_node_id /* should_insert_node_id */, peer.pending_outbound_buffer.len() > 10) // pause_read
463 match should_insert_node_id {
464 Some(node_id) => { peers.node_id_to_descriptor.insert(node_id, peer_descriptor.clone()); },
471 self.process_events();
476 /// Checks for any events generated by our handlers and processes them. May be needed after eg
477 /// calls to ChannelManager::process_pending_htlc_forward.
478 pub fn process_events(&self) {
479 let mut upstream_events = Vec::new();
481 // TODO: There are some DoS attacks here where you can flood someone's outbound send
482 // buffer by doing things like announcing channels on another node. We should be willing to
483 // drop optional-ish messages when send buffers get full!
485 let mut events_generated = self.message_handler.chan_handler.get_and_clear_pending_events();
486 let mut peers = self.peers.lock().unwrap();
487 for event in events_generated.drain(..) {
488 macro_rules! get_peer_for_forwarding {
489 ($node_id: expr, $handle_no_such_peer: block) => {
491 let descriptor = match peers.node_id_to_descriptor.get($node_id) {
492 Some(descriptor) => descriptor.clone(),
494 $handle_no_such_peer;
498 match peers.peers.get_mut(&descriptor) {
502 None => panic!("Inconsistent peers set state!"),
508 Event::FundingGenerationReady {..} => { /* Hand upstream */ },
509 Event::FundingBroadcastSafe {..} => { /* Hand upstream */ },
510 Event::PaymentReceived {..} => { /* Hand upstream */ },
511 Event::PaymentSent {..} => { /* Hand upstream */ },
512 Event::PaymentFailed {..} => { /* Hand upstream */ },
514 Event::PendingHTLCsForwardable {..} => {
515 //TODO: Handle upstream in some confused form so that upstream just knows
516 //to call us somehow?
518 Event::SendFundingCreated { ref node_id, ref msg } => {
519 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
520 //TODO: generate a DiscardFunding event indicating to the wallet that
521 //they should just throw away this funding transaction
523 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 34)));
524 Self::do_attempt_write_data(&mut descriptor, peer);
527 Event::SendFundingLocked { ref node_id, ref msg, ref announcement_sigs } => {
528 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
529 //TODO: Do whatever we're gonna do for handling dropped messages
531 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 36)));
532 match announcement_sigs {
533 &Some(ref announce_msg) => peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(announce_msg, 259))),
536 Self::do_attempt_write_data(&mut descriptor, peer);
539 Event::SendHTLCs { ref node_id, ref msgs, ref commitment_msg } => {
540 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
541 //TODO: Do whatever we're gonna do for handling dropped messages
544 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 128)));
546 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(commitment_msg, 132)));
547 Self::do_attempt_write_data(&mut descriptor, peer);
550 Event::SendFulfillHTLC { ref node_id, ref msg } => {
551 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
552 //TODO: Do whatever we're gonna do for handling dropped messages
554 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 130)));
555 Self::do_attempt_write_data(&mut descriptor, peer);
558 Event::SendFailHTLC { ref node_id, ref msg } => {
559 let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
560 //TODO: Do whatever we're gonna do for handling dropped messages
562 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 131)));
563 Self::do_attempt_write_data(&mut descriptor, peer);
566 Event::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
567 let encoded_msg = encode_msg!(msg, 256);
568 let encoded_update_msg = encode_msg!(update_msg, 258);
570 for (ref descriptor, ref mut peer) in peers.peers.iter_mut() {
571 if !peer.channel_encryptor.is_ready_for_encryption() {
574 match peer.their_node_id {
576 Some(their_node_id) => {
577 if their_node_id == msg.contents.node_id_1 || their_node_id == msg.contents.node_id_2 {
582 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_msg[..]));
583 peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_update_msg[..]));
584 Self::do_attempt_write_data(&mut (*descriptor).clone(), peer);
590 upstream_events.push(event);
594 let mut pending_events = self.pending_events.lock().unwrap();
595 for event in upstream_events.drain(..) {
596 pending_events.push(event);
600 /// Indicates that the given socket descriptor's connection is now closed.
601 /// This must be called even if a PeerHandleError was given for a read_event or write_event,
602 /// but must NOT be called if a PeerHandleError was provided out of a new_*_connection event!
603 /// Panics if the descriptor was not previously registered in a successful new_*_connection event.
604 pub fn disconnect_event(&self, descriptor: &Descriptor) {
605 let mut peers = self.peers.lock().unwrap();
606 let peer_option = peers.peers.remove(descriptor);
608 None => panic!("Descriptor for disconnect_event is not already known to PeerManager"),
610 match peer.their_node_id {
611 Some(node_id) => { peers.node_id_to_descriptor.remove(&node_id); },
614 //TODO: Notify the chan_handler that this node disconnected, and do something about
615 //handling response messages that were queued for sending (maybe the send buffer
616 //needs to be unencrypted?)
622 impl<Descriptor: SocketDescriptor> EventsProvider for PeerManager<Descriptor> {
623 fn get_and_clear_pending_events(&self) -> Vec<Event> {
624 let mut pending_events = self.pending_events.lock().unwrap();
625 let mut ret = Vec::new();
626 mem::swap(&mut ret, &mut *pending_events);