use prelude::*;
use io;
use alloc::collections::LinkedList;
-use sync::{Arc, Mutex};
+use sync::{Arc, Mutex, MutexGuard, FairRwLock};
+use core::sync::atomic::{AtomicBool, Ordering};
use core::{cmp, hash, fmt, mem};
use core::ops::Deref;
use core::convert::Infallible;
}
}
-struct PeerHolder<Descriptor: SocketDescriptor> {
- peers: HashMap<Descriptor, Peer>,
- /// Only add to this set when noise completes:
- node_id_to_descriptor: HashMap<PublicKey, Descriptor>,
-}
-
/// SimpleArcPeerManager is useful when you need a PeerManager with a static lifetime, e.g.
/// when you're using lightning-net-tokio (since tokio::spawn requires parameters with static
/// lifetimes). Other times you can afford a reference, which is more efficient, in which case
L::Target: Logger,
CMH::Target: CustomMessageHandler {
message_handler: MessageHandler<CM, RM>,
- peers: Mutex<PeerHolder<Descriptor>>,
+ /// Connection state for each connected peer - we have an outer read-write lock which is taken
+ /// as read while we're doing processing for a peer and taken write when a peer is being added
+ /// or removed.
+ ///
+ /// The inner Peer lock is held for sending and receiving bytes, but note that we do *not* hold
+ /// it while we're processing a message. This is fine as [`PeerManager::read_event`] requires
+ /// that there be no parallel calls for a given peer, so mutual exclusion of messages handed to
+ /// the `MessageHandler`s for a given peer is already guaranteed.
+ peers: FairRwLock<HashMap<Descriptor, Mutex<Peer>>>,
+ /// Only add to this set when noise completes.
+ /// Locked *after* peers. When an item is removed, it must be removed with the `peers` write
+ /// lock held. Entries may be added with only the `peers` read lock held (though the
+ /// `Descriptor` value must already exist in `peers`).
+ node_id_to_descriptor: Mutex<HashMap<PublicKey, Descriptor>>,
+ /// We can only have one thread processing events at once, but we don't usually need the full
+ /// `peers` write lock to do so, so instead we block on this empty mutex when entering
+ /// `process_events`.
+ event_processing_lock: Mutex<()>,
+ /// Because event processing is global and always does all available work before returning,
+ /// there is no reason for us to have many event processors waiting on the lock at once.
+ /// Instead, we limit the total blocked event processors to always exactly one by setting this
+ /// when an event process call is waiting.
+ blocked_event_processors: AtomicBool,
our_node_secret: SecretKey,
ephemeral_key_midstate: Sha256Engine,
custom_message_handler: CMH,
PeerManager {
message_handler,
- peers: Mutex::new(PeerHolder {
- peers: HashMap::new(),
- node_id_to_descriptor: HashMap::new()
- }),
+ peers: FairRwLock::new(HashMap::new()),
+ node_id_to_descriptor: Mutex::new(HashMap::new()),
+ event_processing_lock: Mutex::new(()),
+ blocked_event_processors: AtomicBool::new(false),
our_node_secret,
ephemeral_key_midstate,
peer_counter: AtomicCounter::new(),
/// new_outbound_connection, however entries will only appear once the initial handshake has
/// completed and we are sure the remote peer has the private key for the given node_id.
pub fn get_peer_node_ids(&self) -> Vec<PublicKey> {
- let peers = self.peers.lock().unwrap();
- peers.peers.values().filter_map(|p| {
+ let peers = self.peers.read().unwrap();
+ peers.values().filter_map(|peer_mutex| {
+ let p = peer_mutex.lock().unwrap();
if !p.channel_encryptor.is_ready_for_encryption() || p.their_features.is_none() {
return None;
}
let res = peer_encryptor.get_act_one().to_vec();
let pending_read_buffer = [0; 50].to_vec(); // Noise act two is 50 bytes
- let mut peers = self.peers.lock().unwrap();
- if peers.peers.insert(descriptor, Peer {
+ let mut peers = self.peers.write().unwrap();
+ if peers.insert(descriptor, Mutex::new(Peer {
channel_encryptor: peer_encryptor,
their_node_id: None,
their_features: None,
awaiting_pong_timer_tick_intervals: 0,
received_message_since_timer_tick: false,
sent_gossip_timestamp_filter: false,
- }).is_some() {
+ })).is_some() {
panic!("PeerManager driver duplicated descriptors!");
};
Ok(res)
let peer_encryptor = PeerChannelEncryptor::new_inbound(&self.our_node_secret);
let pending_read_buffer = [0; 50].to_vec(); // Noise act one is 50 bytes
- let mut peers = self.peers.lock().unwrap();
- if peers.peers.insert(descriptor, Peer {
+ let mut peers = self.peers.write().unwrap();
+ if peers.insert(descriptor, Mutex::new(Peer {
channel_encryptor: peer_encryptor,
their_node_id: None,
their_features: None,
awaiting_pong_timer_tick_intervals: 0,
received_message_since_timer_tick: false,
sent_gossip_timestamp_filter: false,
- }).is_some() {
+ })).is_some() {
panic!("PeerManager driver duplicated descriptors!");
};
Ok(())
/// [`send_data`]: SocketDescriptor::send_data
/// [`write_buffer_space_avail`]: PeerManager::write_buffer_space_avail
pub fn write_buffer_space_avail(&self, descriptor: &mut Descriptor) -> Result<(), PeerHandleError> {
- let mut peers = self.peers.lock().unwrap();
- match peers.peers.get_mut(descriptor) {
+ let peers = self.peers.read().unwrap();
+ match peers.get(descriptor) {
None => {
// This is most likely a simple race condition where the user found that the socket
// was writeable, then we told the user to `disconnect_socket()`, then they called
// this method. Return an error to make sure we get disconnected.
return Err(PeerHandleError { no_connection_possible: false });
},
- Some(peer) => {
+ Some(peer_mutex) => {
+ let mut peer = peer_mutex.lock().unwrap();
peer.awaiting_write_event = false;
- self.do_attempt_write_data(descriptor, peer);
+ self.do_attempt_write_data(descriptor, &mut peer);
}
};
Ok(())
}
fn do_read_event(&self, peer_descriptor: &mut Descriptor, data: &[u8]) -> Result<bool, PeerHandleError> {
- let pause_read = {
- let mut peers_lock = self.peers.lock().unwrap();
- let peers = &mut *peers_lock;
- let mut msgs_to_forward = Vec::new();
- let mut peer_node_id = None;
- let pause_read = match peers.peers.get_mut(peer_descriptor) {
- None => {
- // This is most likely a simple race condition where the user read some bytes
- // from the socket, then we told the user to `disconnect_socket()`, then they
- // called this method. Return an error to make sure we get disconnected.
- return Err(PeerHandleError { no_connection_possible: false });
- },
- Some(peer) => {
+ let mut pause_read = false;
+ let peers = self.peers.read().unwrap();
+ let mut msgs_to_forward = Vec::new();
+ let mut peer_node_id = None;
+ match peers.get(peer_descriptor) {
+ None => {
+ // This is most likely a simple race condition where the user read some bytes
+ // from the socket, then we told the user to `disconnect_socket()`, then they
+ // called this method. Return an error to make sure we get disconnected.
+ return Err(PeerHandleError { no_connection_possible: false });
+ },
+ Some(peer_mutex) => {
+ let mut read_pos = 0;
+ while read_pos < data.len() {
+ macro_rules! try_potential_handleerror {
+ ($peer: expr, $thing: expr) => {
+ match $thing {
+ Ok(x) => x,
+ Err(e) => {
+ match e.action {
+ msgs::ErrorAction::DisconnectPeer { msg: _ } => {
+ //TODO: Try to push msg
+ log_debug!(self.logger, "Error handling message{}; disconnecting peer with: {}", OptionalFromDebugger(&peer_node_id), e.err);
+ return Err(PeerHandleError{ no_connection_possible: false });
+ },
+ msgs::ErrorAction::IgnoreAndLog(level) => {
+ log_given_level!(self.logger, level, "Error handling message{}; ignoring: {}", OptionalFromDebugger(&peer_node_id), e.err);
+ continue
+ },
+ msgs::ErrorAction::IgnoreDuplicateGossip => continue, // Don't even bother logging these
+ msgs::ErrorAction::IgnoreError => {
+ log_debug!(self.logger, "Error handling message{}; ignoring: {}", OptionalFromDebugger(&peer_node_id), e.err);
+ continue;
+ },
+ msgs::ErrorAction::SendErrorMessage { msg } => {
+ log_debug!(self.logger, "Error handling message{}; sending error message with: {}", OptionalFromDebugger(&peer_node_id), e.err);
+ self.enqueue_message($peer, &msg);
+ continue;
+ },
+ msgs::ErrorAction::SendWarningMessage { msg, log_level } => {
+ log_given_level!(self.logger, log_level, "Error handling message{}; sending warning message with: {}", OptionalFromDebugger(&peer_node_id), e.err);
+ self.enqueue_message($peer, &msg);
+ continue;
+ },
+ }
+ }
+ }
+ }
+ }
+
+ let mut peer_lock = peer_mutex.lock().unwrap();
+ let peer = &mut *peer_lock;
+ let mut msg_to_handle = None;
+ if peer_node_id.is_none() {
+ peer_node_id = peer.their_node_id.clone();
+ }
+
assert!(peer.pending_read_buffer.len() > 0);
assert!(peer.pending_read_buffer.len() > peer.pending_read_buffer_pos);
- let mut read_pos = 0;
- while read_pos < data.len() {
- {
- let data_to_copy = cmp::min(peer.pending_read_buffer.len() - peer.pending_read_buffer_pos, data.len() - read_pos);
- 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]);
- read_pos += data_to_copy;
- peer.pending_read_buffer_pos += data_to_copy;
+ {
+ let data_to_copy = cmp::min(peer.pending_read_buffer.len() - peer.pending_read_buffer_pos, data.len() - read_pos);
+ 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]);
+ read_pos += data_to_copy;
+ peer.pending_read_buffer_pos += data_to_copy;
+ }
+
+ if peer.pending_read_buffer_pos == peer.pending_read_buffer.len() {
+ peer.pending_read_buffer_pos = 0;
+
+ macro_rules! insert_node_id {
+ () => {
+ match self.node_id_to_descriptor.lock().unwrap().entry(peer.their_node_id.unwrap()) {
+ hash_map::Entry::Occupied(_) => {
+ log_trace!(self.logger, "Got second connection with {}, closing", log_pubkey!(peer.their_node_id.unwrap()));
+ peer.their_node_id = None; // Unset so that we don't generate a peer_disconnected event
+ return Err(PeerHandleError{ no_connection_possible: false })
+ },
+ hash_map::Entry::Vacant(entry) => {
+ log_debug!(self.logger, "Finished noise handshake for connection with {}", log_pubkey!(peer.their_node_id.unwrap()));
+ entry.insert(peer_descriptor.clone())
+ },
+ };
+ }
}
- if peer.pending_read_buffer_pos == peer.pending_read_buffer.len() {
- peer.pending_read_buffer_pos = 0;
+ let next_step = peer.channel_encryptor.get_noise_step();
+ match next_step {
+ NextNoiseStep::ActOne => {
+ let act_two = try_potential_handleerror!(peer,
+ peer.channel_encryptor.process_act_one_with_keys(&peer.pending_read_buffer[..], &self.our_node_secret, self.get_ephemeral_key())).to_vec();
+ peer.pending_outbound_buffer.push_back(act_two);
+ peer.pending_read_buffer = [0; 66].to_vec(); // act three is 66 bytes long
+ },
+ NextNoiseStep::ActTwo => {
+ let (act_three, their_node_id) = try_potential_handleerror!(peer,
+ peer.channel_encryptor.process_act_two(&peer.pending_read_buffer[..], &self.our_node_secret));
+ peer.pending_outbound_buffer.push_back(act_three.to_vec());
+ peer.pending_read_buffer = [0; 18].to_vec(); // Message length header is 18 bytes
+ peer.pending_read_is_header = true;
+
+ peer.their_node_id = Some(their_node_id);
+ insert_node_id!();
+ let features = InitFeatures::known();
+ let resp = msgs::Init { features, remote_network_address: filter_addresses(peer.their_net_address.clone()) };
+ self.enqueue_message(peer, &resp);
+ peer.awaiting_pong_timer_tick_intervals = 0;
+ },
+ NextNoiseStep::ActThree => {
+ let their_node_id = try_potential_handleerror!(peer,
+ peer.channel_encryptor.process_act_three(&peer.pending_read_buffer[..]));
+ peer.pending_read_buffer = [0; 18].to_vec(); // Message length header is 18 bytes
+ peer.pending_read_is_header = true;
+ peer.their_node_id = Some(their_node_id);
+ insert_node_id!();
+ let features = InitFeatures::known();
+ let resp = msgs::Init { features, remote_network_address: filter_addresses(peer.their_net_address.clone()) };
+ self.enqueue_message(peer, &resp);
+ peer.awaiting_pong_timer_tick_intervals = 0;
+ },
+ NextNoiseStep::NoiseComplete => {
+ if peer.pending_read_is_header {
+ let msg_len = try_potential_handleerror!(peer,
+ peer.channel_encryptor.decrypt_length_header(&peer.pending_read_buffer[..]));
+ if peer.pending_read_buffer.capacity() > 8192 { peer.pending_read_buffer = Vec::new(); }
+ peer.pending_read_buffer.resize(msg_len as usize + 16, 0);
+ if msg_len < 2 { // Need at least the message type tag
+ return Err(PeerHandleError{ no_connection_possible: false });
+ }
+ peer.pending_read_is_header = false;
+ } else {
+ let msg_data = try_potential_handleerror!(peer,
+ peer.channel_encryptor.decrypt_message(&peer.pending_read_buffer[..]));
+ assert!(msg_data.len() >= 2);
+
+ // Reset read buffer
+ if peer.pending_read_buffer.capacity() > 8192 { peer.pending_read_buffer = Vec::new(); }
+ peer.pending_read_buffer.resize(18, 0);
+ peer.pending_read_is_header = true;
- macro_rules! try_potential_handleerror {
- ($thing: expr) => {
- match $thing {
+ let mut reader = io::Cursor::new(&msg_data[..]);
+ let message_result = wire::read(&mut reader, &*self.custom_message_handler);
+ let message = match message_result {
Ok(x) => x,
Err(e) => {
- match e.action {
- msgs::ErrorAction::DisconnectPeer { msg: _ } => {
- //TODO: Try to push msg
- log_debug!(self.logger, "Error handling message{}; disconnecting peer with: {}", OptionalFromDebugger(&peer.their_node_id), e.err);
- return Err(PeerHandleError{ no_connection_possible: false });
- },
- msgs::ErrorAction::IgnoreAndLog(level) => {
- log_given_level!(self.logger, level, "Error handling message{}; ignoring: {}", OptionalFromDebugger(&peer.their_node_id), e.err);
- continue
- },
- msgs::ErrorAction::IgnoreDuplicateGossip => continue, // Don't even bother logging these
- msgs::ErrorAction::IgnoreError => {
- log_debug!(self.logger, "Error handling message{}; ignoring: {}", OptionalFromDebugger(&peer.their_node_id), e.err);
+ match e {
+ // Note that to avoid recursion we never call
+ // `do_attempt_write_data` from here, causing
+ // the messages enqueued here to not actually
+ // be sent before the peer is disconnected.
+ (msgs::DecodeError::UnknownRequiredFeature, Some(ty)) if is_gossip_msg(ty) => {
+ log_gossip!(self.logger, "Got a channel/node announcement with an unknown required feature flag, you may want to update!");
continue;
- },
- msgs::ErrorAction::SendErrorMessage { msg } => {
- log_debug!(self.logger, "Error handling message{}; sending error message with: {}", OptionalFromDebugger(&peer.their_node_id), e.err);
- self.enqueue_message(peer, &msg);
+ }
+ (msgs::DecodeError::UnsupportedCompression, _) => {
+ log_gossip!(self.logger, "We don't support zlib-compressed message fields, sending a warning and ignoring message");
+ self.enqueue_message(peer, &msgs::WarningMessage { channel_id: [0; 32], data: "Unsupported message compression: zlib".to_owned() });
continue;
- },
- msgs::ErrorAction::SendWarningMessage { msg, log_level } => {
- log_given_level!(self.logger, log_level, "Error handling message{}; sending warning message with: {}", OptionalFromDebugger(&peer.their_node_id), e.err);
- self.enqueue_message(peer, &msg);
+ }
+ (_, Some(ty)) if is_gossip_msg(ty) => {
+ log_gossip!(self.logger, "Got an invalid value while deserializing a gossip message");
+ self.enqueue_message(peer, &msgs::WarningMessage { channel_id: [0; 32], data: "Unreadable/bogus gossip message".to_owned() });
continue;
- },
+ }
+ (msgs::DecodeError::UnknownRequiredFeature, ty) => {
+ log_gossip!(self.logger, "Received a message with an unknown required feature flag or TLV, you may want to update!");
+ self.enqueue_message(peer, &msgs::WarningMessage { channel_id: [0; 32], data: format!("Received an unknown required feature/TLV in message type {:?}", ty) });
+ return Err(PeerHandleError { no_connection_possible: false });
+ }
+ (msgs::DecodeError::UnknownVersion, _) => return Err(PeerHandleError { no_connection_possible: false }),
+ (msgs::DecodeError::InvalidValue, _) => {
+ log_debug!(self.logger, "Got an invalid value while deserializing message");
+ return Err(PeerHandleError { no_connection_possible: false });
+ }
+ (msgs::DecodeError::ShortRead, _) => {
+ log_debug!(self.logger, "Deserialization failed due to shortness of message");
+ return Err(PeerHandleError { no_connection_possible: false });
+ }
+ (msgs::DecodeError::BadLengthDescriptor, _) => return Err(PeerHandleError { no_connection_possible: false }),
+ (msgs::DecodeError::Io(_), _) => return Err(PeerHandleError { no_connection_possible: false }),
}
}
- }
- }
- }
-
- macro_rules! insert_node_id {
- () => {
- match peers.node_id_to_descriptor.entry(peer.their_node_id.unwrap()) {
- hash_map::Entry::Occupied(_) => {
- log_trace!(self.logger, "Got second connection with {}, closing", log_pubkey!(peer.their_node_id.unwrap()));
- peer.their_node_id = None; // Unset so that we don't generate a peer_disconnected event
- return Err(PeerHandleError{ no_connection_possible: false })
- },
- hash_map::Entry::Vacant(entry) => {
- log_debug!(self.logger, "Finished noise handshake for connection with {}", log_pubkey!(peer.their_node_id.unwrap()));
- entry.insert(peer_descriptor.clone())
- },
};
- }
- }
-
- let next_step = peer.channel_encryptor.get_noise_step();
- match next_step {
- NextNoiseStep::ActOne => {
- 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();
- peer.pending_outbound_buffer.push_back(act_two);
- peer.pending_read_buffer = [0; 66].to_vec(); // act three is 66 bytes long
- },
- NextNoiseStep::ActTwo => {
- let (act_three, their_node_id) = try_potential_handleerror!(peer.channel_encryptor.process_act_two(&peer.pending_read_buffer[..], &self.our_node_secret));
- peer.pending_outbound_buffer.push_back(act_three.to_vec());
- peer.pending_read_buffer = [0; 18].to_vec(); // Message length header is 18 bytes
- peer.pending_read_is_header = true;
- peer.their_node_id = Some(their_node_id);
- insert_node_id!();
- let features = InitFeatures::known();
- let resp = msgs::Init { features, remote_network_address: filter_addresses(peer.their_net_address.clone())};
- self.enqueue_message(peer, &resp);
- peer.awaiting_pong_timer_tick_intervals = 0;
- },
- NextNoiseStep::ActThree => {
- let their_node_id = try_potential_handleerror!(peer.channel_encryptor.process_act_three(&peer.pending_read_buffer[..]));
- peer.pending_read_buffer = [0; 18].to_vec(); // Message length header is 18 bytes
- peer.pending_read_is_header = true;
- peer.their_node_id = Some(their_node_id);
- insert_node_id!();
- let features = InitFeatures::known();
- let resp = msgs::Init { features, remote_network_address: filter_addresses(peer.their_net_address.clone())};
- self.enqueue_message(peer, &resp);
- peer.awaiting_pong_timer_tick_intervals = 0;
- },
- NextNoiseStep::NoiseComplete => {
- if peer.pending_read_is_header {
- let msg_len = try_potential_handleerror!(peer.channel_encryptor.decrypt_length_header(&peer.pending_read_buffer[..]));
- peer.pending_read_buffer = Vec::with_capacity(msg_len as usize + 16);
- peer.pending_read_buffer.resize(msg_len as usize + 16, 0);
- if msg_len < 2 { // Need at least the message type tag
- return Err(PeerHandleError{ no_connection_possible: false });
- }
- peer.pending_read_is_header = false;
- } else {
- let msg_data = try_potential_handleerror!(peer.channel_encryptor.decrypt_message(&peer.pending_read_buffer[..]));
- assert!(msg_data.len() >= 2);
-
- // Reset read buffer
- peer.pending_read_buffer = [0; 18].to_vec();
- peer.pending_read_is_header = true;
-
- let mut reader = io::Cursor::new(&msg_data[..]);
- let message_result = wire::read(&mut reader, &*self.custom_message_handler);
- let message = match message_result {
- Ok(x) => x,
- Err(e) => {
- match e {
- // Note that to avoid recursion we never call
- // `do_attempt_write_data` from here, causing
- // the messages enqueued here to not actually
- // be sent before the peer is disconnected.
- (msgs::DecodeError::UnknownRequiredFeature, Some(ty)) if is_gossip_msg(ty) => {
- log_gossip!(self.logger, "Got a channel/node announcement with an unknown required feature flag, you may want to update!");
- continue;
- }
- (msgs::DecodeError::UnsupportedCompression, _) => {
- log_gossip!(self.logger, "We don't support zlib-compressed message fields, sending a warning and ignoring message");
- self.enqueue_message(peer, &msgs::WarningMessage { channel_id: [0; 32], data: "Unsupported message compression: zlib".to_owned() });
- continue;
- }
- (_, Some(ty)) if is_gossip_msg(ty) => {
- log_gossip!(self.logger, "Got an invalid value while deserializing a gossip message");
- self.enqueue_message(peer, &msgs::WarningMessage { channel_id: [0; 32], data: "Unreadable/bogus gossip message".to_owned() });
- continue;
- }
- (msgs::DecodeError::UnknownRequiredFeature, ty) => {
- log_gossip!(self.logger, "Received a message with an unknown required feature flag or TLV, you may want to update!");
- self.enqueue_message(peer, &msgs::WarningMessage { channel_id: [0; 32], data: format!("Received an unknown required feature/TLV in message type {:?}", ty) });
- return Err(PeerHandleError { no_connection_possible: false });
- }
- (msgs::DecodeError::UnknownVersion, _) => return Err(PeerHandleError { no_connection_possible: false }),
- (msgs::DecodeError::InvalidValue, _) => {
- log_debug!(self.logger, "Got an invalid value while deserializing message");
- return Err(PeerHandleError { no_connection_possible: false });
- }
- (msgs::DecodeError::ShortRead, _) => {
- log_debug!(self.logger, "Deserialization failed due to shortness of message");
- return Err(PeerHandleError { no_connection_possible: false });
- }
- (msgs::DecodeError::BadLengthDescriptor, _) => return Err(PeerHandleError { no_connection_possible: false }),
- (msgs::DecodeError::Io(_), _) => return Err(PeerHandleError { no_connection_possible: false }),
- }
- }
- };
-
- match self.handle_message(peer, message) {
- Err(handling_error) => match handling_error {
- MessageHandlingError::PeerHandleError(e) => { return Err(e) },
- MessageHandlingError::LightningError(e) => {
- try_potential_handleerror!(Err(e));
- },
- },
- Ok(Some(msg)) => {
- peer_node_id = Some(peer.their_node_id.expect("After noise is complete, their_node_id is always set"));
- msgs_to_forward.push(msg);
- },
- Ok(None) => {},
- }
- }
+ msg_to_handle = Some(message);
}
}
}
}
-
- peer.pending_outbound_buffer.len() > OUTBOUND_BUFFER_LIMIT_READ_PAUSE // pause_read
+ pause_read = peer.pending_outbound_buffer.len() > OUTBOUND_BUFFER_LIMIT_READ_PAUSE;
+
+ if let Some(message) = msg_to_handle {
+ match self.handle_message(&peer_mutex, peer_lock, message) {
+ Err(handling_error) => match handling_error {
+ MessageHandlingError::PeerHandleError(e) => { return Err(e) },
+ MessageHandlingError::LightningError(e) => {
+ try_potential_handleerror!(&mut peer_mutex.lock().unwrap(), Err(e));
+ },
+ },
+ Ok(Some(msg)) => {
+ msgs_to_forward.push(msg);
+ },
+ Ok(None) => {},
+ }
+ }
}
- };
-
- for msg in msgs_to_forward.drain(..) {
- self.forward_broadcast_msg(peers, &msg, peer_node_id.as_ref());
}
+ }
- pause_read
- };
+ for msg in msgs_to_forward.drain(..) {
+ self.forward_broadcast_msg(&*peers, &msg, peer_node_id.as_ref());
+ }
Ok(pause_read)
}
/// Returns the message back if it needs to be broadcasted to all other peers.
fn handle_message(
&self,
- peer: &mut Peer,
+ peer_mutex: &Mutex<Peer>,
+ mut peer_lock: MutexGuard<Peer>,
message: wire::Message<<<CMH as core::ops::Deref>::Target as wire::CustomMessageReader>::CustomMessage>
) -> Result<Option<wire::Message<<<CMH as core::ops::Deref>::Target as wire::CustomMessageReader>::CustomMessage>>, MessageHandlingError> {
- if is_gossip_msg(message.type_id()) {
- log_gossip!(self.logger, "Received message {:?} from {}", message, log_pubkey!(peer.their_node_id.unwrap()));
- } else {
- log_trace!(self.logger, "Received message {:?} from {}", message, log_pubkey!(peer.their_node_id.unwrap()));
- }
-
- peer.received_message_since_timer_tick = true;
+ let their_node_id = peer_lock.their_node_id.clone().expect("We know the peer's public key by the time we receive messages");
+ peer_lock.received_message_since_timer_tick = true;
// Need an Init as first message
- if let wire::Message::Init(_) = message {
- } else if peer.their_features.is_none() {
- log_debug!(self.logger, "Peer {} sent non-Init first message", log_pubkey!(peer.their_node_id.unwrap()));
+ if let wire::Message::Init(msg) = message {
+ if msg.features.requires_unknown_bits() {
+ log_debug!(self.logger, "Peer features required unknown version bits");
+ return Err(PeerHandleError{ no_connection_possible: true }.into());
+ }
+ if peer_lock.their_features.is_some() {
+ return Err(PeerHandleError{ no_connection_possible: false }.into());
+ }
+
+ log_info!(self.logger, "Received peer Init message from {}: {}", log_pubkey!(their_node_id), msg.features);
+
+ // For peers not supporting gossip queries start sync now, otherwise wait until we receive a filter.
+ if msg.features.initial_routing_sync() && !msg.features.supports_gossip_queries() {
+ peer_lock.sync_status = InitSyncTracker::ChannelsSyncing(0);
+ }
+
+ if !msg.features.supports_static_remote_key() {
+ log_debug!(self.logger, "Peer {} does not support static remote key, disconnecting with no_connection_possible", log_pubkey!(their_node_id));
+ return Err(PeerHandleError{ no_connection_possible: true }.into());
+ }
+
+ self.message_handler.route_handler.peer_connected(&their_node_id, &msg);
+
+ self.message_handler.chan_handler.peer_connected(&their_node_id, &msg);
+ peer_lock.their_features = Some(msg.features);
+ return Ok(None);
+ } else if peer_lock.their_features.is_none() {
+ log_debug!(self.logger, "Peer {} sent non-Init first message", log_pubkey!(their_node_id));
return Err(PeerHandleError{ no_connection_possible: false }.into());
}
- let mut should_forward = None;
-
- match message {
- // Setup and Control messages:
- wire::Message::Init(msg) => {
- if msg.features.requires_unknown_bits() {
- log_debug!(self.logger, "Peer features required unknown version bits");
- return Err(PeerHandleError{ no_connection_possible: true }.into());
- }
- if peer.their_features.is_some() {
- return Err(PeerHandleError{ no_connection_possible: false }.into());
- }
+ if let wire::Message::GossipTimestampFilter(_msg) = message {
+ // When supporting gossip messages, start inital gossip sync only after we receive
+ // a GossipTimestampFilter
+ if peer_lock.their_features.as_ref().unwrap().supports_gossip_queries() &&
+ !peer_lock.sent_gossip_timestamp_filter {
+ peer_lock.sent_gossip_timestamp_filter = true;
+ peer_lock.sync_status = InitSyncTracker::ChannelsSyncing(0);
+ }
+ return Ok(None);
+ }
- log_info!(self.logger, "Received peer Init message from {}: {}", log_pubkey!(peer.their_node_id.unwrap()), msg.features);
+ let their_features = peer_lock.their_features.clone();
+ mem::drop(peer_lock);
- // For peers not supporting gossip queries start sync now, otherwise wait until we receive a filter.
- if msg.features.initial_routing_sync() && !msg.features.supports_gossip_queries() {
- peer.sync_status = InitSyncTracker::ChannelsSyncing(0);
- }
- if !msg.features.supports_static_remote_key() {
- log_debug!(self.logger, "Peer {} does not support static remote key, disconnecting with no_connection_possible", log_pubkey!(peer.their_node_id.unwrap()));
- return Err(PeerHandleError{ no_connection_possible: true }.into());
- }
+ if is_gossip_msg(message.type_id()) {
+ log_gossip!(self.logger, "Received message {:?} from {}", message, log_pubkey!(their_node_id));
+ } else {
+ log_trace!(self.logger, "Received message {:?} from {}", message, log_pubkey!(their_node_id));
+ }
- self.message_handler.route_handler.peer_connected(&peer.their_node_id.unwrap(), &msg);
+ let mut should_forward = None;
- self.message_handler.chan_handler.peer_connected(&peer.their_node_id.unwrap(), &msg);
- peer.their_features = Some(msg.features);
+ match message {
+ // Setup and Control messages:
+ wire::Message::Init(_) => {
+ // Handled above
+ },
+ wire::Message::GossipTimestampFilter(_) => {
+ // Handled above
},
wire::Message::Error(msg) => {
let mut data_is_printable = true;
}
if data_is_printable {
- log_debug!(self.logger, "Got Err message from {}: {}", log_pubkey!(peer.their_node_id.unwrap()), msg.data);
+ log_debug!(self.logger, "Got Err message from {}: {}", log_pubkey!(their_node_id), msg.data);
} else {
- log_debug!(self.logger, "Got Err message from {} with non-ASCII error message", log_pubkey!(peer.their_node_id.unwrap()));
+ log_debug!(self.logger, "Got Err message from {} with non-ASCII error message", log_pubkey!(their_node_id));
}
- self.message_handler.chan_handler.handle_error(&peer.their_node_id.unwrap(), &msg);
+ self.message_handler.chan_handler.handle_error(&their_node_id, &msg);
if msg.channel_id == [0; 32] {
return Err(PeerHandleError{ no_connection_possible: true }.into());
}
}
if data_is_printable {
- log_debug!(self.logger, "Got warning message from {}: {}", log_pubkey!(peer.their_node_id.unwrap()), msg.data);
+ log_debug!(self.logger, "Got warning message from {}: {}", log_pubkey!(their_node_id), msg.data);
} else {
- log_debug!(self.logger, "Got warning message from {} with non-ASCII error message", log_pubkey!(peer.their_node_id.unwrap()));
+ log_debug!(self.logger, "Got warning message from {} with non-ASCII error message", log_pubkey!(their_node_id));
}
},
wire::Message::Ping(msg) => {
if msg.ponglen < 65532 {
let resp = msgs::Pong { byteslen: msg.ponglen };
- self.enqueue_message(peer, &resp);
+ self.enqueue_message(&mut *peer_mutex.lock().unwrap(), &resp);
}
},
wire::Message::Pong(_msg) => {
- peer.awaiting_pong_timer_tick_intervals = 0;
- peer.msgs_sent_since_pong = 0;
+ let mut peer_lock = peer_mutex.lock().unwrap();
+ peer_lock.awaiting_pong_timer_tick_intervals = 0;
+ peer_lock.msgs_sent_since_pong = 0;
},
// Channel messages:
wire::Message::OpenChannel(msg) => {
- self.message_handler.chan_handler.handle_open_channel(&peer.their_node_id.unwrap(), peer.their_features.clone().unwrap(), &msg);
+ self.message_handler.chan_handler.handle_open_channel(&their_node_id, their_features.clone().unwrap(), &msg);
},
wire::Message::AcceptChannel(msg) => {
- self.message_handler.chan_handler.handle_accept_channel(&peer.their_node_id.unwrap(), peer.their_features.clone().unwrap(), &msg);
+ self.message_handler.chan_handler.handle_accept_channel(&their_node_id, their_features.clone().unwrap(), &msg);
},
wire::Message::FundingCreated(msg) => {
- self.message_handler.chan_handler.handle_funding_created(&peer.their_node_id.unwrap(), &msg);
+ self.message_handler.chan_handler.handle_funding_created(&their_node_id, &msg);
},
wire::Message::FundingSigned(msg) => {
- self.message_handler.chan_handler.handle_funding_signed(&peer.their_node_id.unwrap(), &msg);
+ self.message_handler.chan_handler.handle_funding_signed(&their_node_id, &msg);
},
wire::Message::FundingLocked(msg) => {
- self.message_handler.chan_handler.handle_funding_locked(&peer.their_node_id.unwrap(), &msg);
+ self.message_handler.chan_handler.handle_funding_locked(&their_node_id, &msg);
},
wire::Message::Shutdown(msg) => {
- self.message_handler.chan_handler.handle_shutdown(&peer.their_node_id.unwrap(), peer.their_features.as_ref().unwrap(), &msg);
+ self.message_handler.chan_handler.handle_shutdown(&their_node_id, their_features.as_ref().unwrap(), &msg);
},
wire::Message::ClosingSigned(msg) => {
- self.message_handler.chan_handler.handle_closing_signed(&peer.their_node_id.unwrap(), &msg);
+ self.message_handler.chan_handler.handle_closing_signed(&their_node_id, &msg);
},
// Commitment messages:
wire::Message::UpdateAddHTLC(msg) => {
- self.message_handler.chan_handler.handle_update_add_htlc(&peer.their_node_id.unwrap(), &msg);
+ self.message_handler.chan_handler.handle_update_add_htlc(&their_node_id, &msg);
},
wire::Message::UpdateFulfillHTLC(msg) => {
- self.message_handler.chan_handler.handle_update_fulfill_htlc(&peer.their_node_id.unwrap(), &msg);
+ self.message_handler.chan_handler.handle_update_fulfill_htlc(&their_node_id, &msg);
},
wire::Message::UpdateFailHTLC(msg) => {
- self.message_handler.chan_handler.handle_update_fail_htlc(&peer.their_node_id.unwrap(), &msg);
+ self.message_handler.chan_handler.handle_update_fail_htlc(&their_node_id, &msg);
},
wire::Message::UpdateFailMalformedHTLC(msg) => {
- self.message_handler.chan_handler.handle_update_fail_malformed_htlc(&peer.their_node_id.unwrap(), &msg);
+ self.message_handler.chan_handler.handle_update_fail_malformed_htlc(&their_node_id, &msg);
},
wire::Message::CommitmentSigned(msg) => {
- self.message_handler.chan_handler.handle_commitment_signed(&peer.their_node_id.unwrap(), &msg);
+ self.message_handler.chan_handler.handle_commitment_signed(&their_node_id, &msg);
},
wire::Message::RevokeAndACK(msg) => {
- self.message_handler.chan_handler.handle_revoke_and_ack(&peer.their_node_id.unwrap(), &msg);
+ self.message_handler.chan_handler.handle_revoke_and_ack(&their_node_id, &msg);
},
wire::Message::UpdateFee(msg) => {
- self.message_handler.chan_handler.handle_update_fee(&peer.their_node_id.unwrap(), &msg);
+ self.message_handler.chan_handler.handle_update_fee(&their_node_id, &msg);
},
wire::Message::ChannelReestablish(msg) => {
- self.message_handler.chan_handler.handle_channel_reestablish(&peer.their_node_id.unwrap(), &msg);
+ self.message_handler.chan_handler.handle_channel_reestablish(&their_node_id, &msg);
},
// Routing messages:
wire::Message::AnnouncementSignatures(msg) => {
- self.message_handler.chan_handler.handle_announcement_signatures(&peer.their_node_id.unwrap(), &msg);
+ self.message_handler.chan_handler.handle_announcement_signatures(&their_node_id, &msg);
},
wire::Message::ChannelAnnouncement(msg) => {
if self.message_handler.route_handler.handle_channel_announcement(&msg)
}
},
wire::Message::ChannelUpdate(msg) => {
- self.message_handler.chan_handler.handle_channel_update(&peer.their_node_id.unwrap(), &msg);
+ self.message_handler.chan_handler.handle_channel_update(&their_node_id, &msg);
if self.message_handler.route_handler.handle_channel_update(&msg)
.map_err(|e| -> MessageHandlingError { e.into() })? {
should_forward = Some(wire::Message::ChannelUpdate(msg));
}
},
wire::Message::QueryShortChannelIds(msg) => {
- self.message_handler.route_handler.handle_query_short_channel_ids(&peer.their_node_id.unwrap(), msg)?;
+ self.message_handler.route_handler.handle_query_short_channel_ids(&their_node_id, msg)?;
},
wire::Message::ReplyShortChannelIdsEnd(msg) => {
- self.message_handler.route_handler.handle_reply_short_channel_ids_end(&peer.their_node_id.unwrap(), msg)?;
+ self.message_handler.route_handler.handle_reply_short_channel_ids_end(&their_node_id, msg)?;
},
wire::Message::QueryChannelRange(msg) => {
- self.message_handler.route_handler.handle_query_channel_range(&peer.their_node_id.unwrap(), msg)?;
+ self.message_handler.route_handler.handle_query_channel_range(&their_node_id, msg)?;
},
wire::Message::ReplyChannelRange(msg) => {
- self.message_handler.route_handler.handle_reply_channel_range(&peer.their_node_id.unwrap(), msg)?;
- },
- wire::Message::GossipTimestampFilter(_msg) => {
- // When supporting gossip messages, start inital gossip sync only after we receive
- // a GossipTimestampFilter
- if peer.their_features.as_ref().unwrap().supports_gossip_queries() &&
- !peer.sent_gossip_timestamp_filter {
- peer.sent_gossip_timestamp_filter = true;
- peer.sync_status = InitSyncTracker::ChannelsSyncing(0);
- }
+ self.message_handler.route_handler.handle_reply_channel_range(&their_node_id, msg)?;
},
// Unknown messages:
log_trace!(self.logger, "Received unknown odd message of type {}, ignoring", type_id);
},
wire::Message::Custom(custom) => {
- self.custom_message_handler.handle_custom_message(custom, &peer.their_node_id.unwrap())?;
+ self.custom_message_handler.handle_custom_message(custom, &their_node_id)?;
},
};
Ok(should_forward)
}
- fn forward_broadcast_msg(&self, peers: &mut PeerHolder<Descriptor>, msg: &wire::Message<<<CMH as core::ops::Deref>::Target as wire::CustomMessageReader>::CustomMessage>, except_node: Option<&PublicKey>) {
+ fn forward_broadcast_msg(&self, peers: &HashMap<Descriptor, Mutex<Peer>>, msg: &wire::Message<<<CMH as core::ops::Deref>::Target as wire::CustomMessageReader>::CustomMessage>, except_node: Option<&PublicKey>) {
match msg {
wire::Message::ChannelAnnouncement(ref msg) => {
log_gossip!(self.logger, "Sending message to all peers except {:?} or the announced channel's counterparties: {:?}", except_node, msg);
let encoded_msg = encode_msg!(msg);
- for (_, peer) in peers.peers.iter_mut() {
+ for (_, peer_mutex) in peers.iter() {
+ let mut peer = peer_mutex.lock().unwrap();
if !peer.channel_encryptor.is_ready_for_encryption() || peer.their_features.is_none() ||
!peer.should_forward_channel_announcement(msg.contents.short_channel_id) {
continue
if except_node.is_some() && peer.their_node_id.as_ref() == except_node {
continue;
}
- self.enqueue_encoded_message(peer, &encoded_msg);
+ self.enqueue_encoded_message(&mut *peer, &encoded_msg);
}
},
wire::Message::NodeAnnouncement(ref msg) => {
log_gossip!(self.logger, "Sending message to all peers except {:?} or the announced node: {:?}", except_node, msg);
let encoded_msg = encode_msg!(msg);
- for (_, peer) in peers.peers.iter_mut() {
+ for (_, peer_mutex) in peers.iter() {
+ let mut peer = peer_mutex.lock().unwrap();
if !peer.channel_encryptor.is_ready_for_encryption() || peer.their_features.is_none() ||
!peer.should_forward_node_announcement(msg.contents.node_id) {
continue
if except_node.is_some() && peer.their_node_id.as_ref() == except_node {
continue;
}
- self.enqueue_encoded_message(peer, &encoded_msg);
+ self.enqueue_encoded_message(&mut *peer, &encoded_msg);
}
},
wire::Message::ChannelUpdate(ref msg) => {
log_gossip!(self.logger, "Sending message to all peers except {:?}: {:?}", except_node, msg);
let encoded_msg = encode_msg!(msg);
- for (_, peer) in peers.peers.iter_mut() {
+ for (_, peer_mutex) in peers.iter() {
+ let mut peer = peer_mutex.lock().unwrap();
if !peer.channel_encryptor.is_ready_for_encryption() || peer.their_features.is_none() ||
!peer.should_forward_channel_announcement(msg.contents.short_channel_id) {
continue
if except_node.is_some() && peer.their_node_id.as_ref() == except_node {
continue;
}
- self.enqueue_encoded_message(peer, &encoded_msg);
+ self.enqueue_encoded_message(&mut *peer, &encoded_msg);
}
},
_ => debug_assert!(false, "We shouldn't attempt to forward anything but gossip messages"),
/// You don't have to call this function explicitly if you are using [`lightning-net-tokio`]
/// or one of the other clients provided in our language bindings.
///
+ /// Note that if there are any other calls to this function waiting on lock(s) this may return
+ /// without doing any work. All available events that need handling will be handled before the
+ /// other calls return.
+ ///
/// [`send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
/// [`ChannelManager::process_pending_htlc_forwards`]: crate::ln::channelmanager::ChannelManager::process_pending_htlc_forwards
/// [`send_data`]: SocketDescriptor::send_data
pub fn process_events(&self) {
+ let mut _single_processor_lock = self.event_processing_lock.try_lock();
+ if _single_processor_lock.is_err() {
+ // While we could wake the older sleeper here with a CV and make more even waiting
+ // times, that would be a lot of overengineering for a simple "reduce total waiter
+ // count" goal.
+ match self.blocked_event_processors.compare_exchange(false, true, Ordering::AcqRel, Ordering::Acquire) {
+ Err(val) => {
+ debug_assert!(val, "compare_exchange failed spuriously?");
+ return;
+ },
+ Ok(val) => {
+ debug_assert!(!val, "compare_exchange succeeded spuriously?");
+ // We're the only waiter, as the running process_events may have emptied the
+ // pending events "long" ago and there are new events for us to process, wait until
+ // its done and process any leftover events before returning.
+ _single_processor_lock = Ok(self.event_processing_lock.lock().unwrap());
+ self.blocked_event_processors.store(false, Ordering::Release);
+ }
+ }
+ }
+
+ let mut peers_to_disconnect = HashMap::new();
+ let mut events_generated = self.message_handler.chan_handler.get_and_clear_pending_msg_events();
+ events_generated.append(&mut self.message_handler.route_handler.get_and_clear_pending_msg_events());
+
{
// TODO: There are some DoS attacks here where you can flood someone's outbound send
// buffer by doing things like announcing channels on another node. We should be willing to
// drop optional-ish messages when send buffers get full!
- let mut peers_lock = self.peers.lock().unwrap();
- let mut events_generated = self.message_handler.chan_handler.get_and_clear_pending_msg_events();
- events_generated.append(&mut self.message_handler.route_handler.get_and_clear_pending_msg_events());
- let peers = &mut *peers_lock;
+ let peers_lock = self.peers.read().unwrap();
+ let peers = &*peers_lock;
macro_rules! get_peer_for_forwarding {
($node_id: expr) => {
{
- match peers.node_id_to_descriptor.get($node_id) {
- Some(descriptor) => match peers.peers.get_mut(&descriptor) {
- Some(peer) => {
- if peer.their_features.is_none() {
+ if peers_to_disconnect.get($node_id).is_some() {
+ // If we've "disconnected" this peer, do not send to it.
+ continue;
+ }
+ let descriptor_opt = self.node_id_to_descriptor.lock().unwrap().get($node_id).cloned();
+ match descriptor_opt {
+ Some(descriptor) => match peers.get(&descriptor) {
+ Some(peer_mutex) => {
+ let peer_lock = peer_mutex.lock().unwrap();
+ if peer_lock.their_features.is_none() {
continue;
}
- peer
+ peer_lock
},
- None => panic!("Inconsistent peers set state!"),
+ None => {
+ debug_assert!(false, "Inconsistent peers set state!");
+ continue;
+ }
},
None => {
continue;
log_debug!(self.logger, "Handling SendAcceptChannel event in peer_handler for node {} for channel {}",
log_pubkey!(node_id),
log_bytes!(msg.temporary_channel_id));
- self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
},
MessageSendEvent::SendOpenChannel { ref node_id, ref msg } => {
log_debug!(self.logger, "Handling SendOpenChannel event in peer_handler for node {} for channel {}",
log_pubkey!(node_id),
log_bytes!(msg.temporary_channel_id));
- self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
},
MessageSendEvent::SendFundingCreated { ref node_id, ref msg } => {
log_debug!(self.logger, "Handling SendFundingCreated event in peer_handler for node {} for channel {} (which becomes {})",
log_funding_channel_id!(msg.funding_txid, msg.funding_output_index));
// TODO: If the peer is gone we should generate a DiscardFunding event
// indicating to the wallet that they should just throw away this funding transaction
- self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
},
MessageSendEvent::SendFundingSigned { ref node_id, ref msg } => {
log_debug!(self.logger, "Handling SendFundingSigned event in peer_handler for node {} for channel {}",
log_pubkey!(node_id),
log_bytes!(msg.channel_id));
- self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
},
MessageSendEvent::SendFundingLocked { ref node_id, ref msg } => {
log_debug!(self.logger, "Handling SendFundingLocked event in peer_handler for node {} for channel {}",
log_pubkey!(node_id),
log_bytes!(msg.channel_id));
- self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
},
MessageSendEvent::SendAnnouncementSignatures { ref node_id, ref msg } => {
log_debug!(self.logger, "Handling SendAnnouncementSignatures event in peer_handler for node {} for channel {})",
log_pubkey!(node_id),
log_bytes!(msg.channel_id));
- self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
},
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 } } => {
log_debug!(self.logger, "Handling UpdateHTLCs event in peer_handler for node {} with {} adds, {} fulfills, {} fails for channel {}",
update_fulfill_htlcs.len(),
update_fail_htlcs.len(),
log_bytes!(commitment_signed.channel_id));
- let peer = get_peer_for_forwarding!(node_id);
+ let mut peer = get_peer_for_forwarding!(node_id);
for msg in update_add_htlcs {
- self.enqueue_message(peer, msg);
+ self.enqueue_message(&mut *peer, msg);
}
for msg in update_fulfill_htlcs {
- self.enqueue_message(peer, msg);
+ self.enqueue_message(&mut *peer, msg);
}
for msg in update_fail_htlcs {
- self.enqueue_message(peer, msg);
+ self.enqueue_message(&mut *peer, msg);
}
for msg in update_fail_malformed_htlcs {
- self.enqueue_message(peer, msg);
+ self.enqueue_message(&mut *peer, msg);
}
if let &Some(ref msg) = update_fee {
- self.enqueue_message(peer, msg);
+ self.enqueue_message(&mut *peer, msg);
}
- self.enqueue_message(peer, commitment_signed);
+ self.enqueue_message(&mut *peer, commitment_signed);
},
MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
log_debug!(self.logger, "Handling SendRevokeAndACK event in peer_handler for node {} for channel {}",
log_pubkey!(node_id),
log_bytes!(msg.channel_id));
- self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
},
MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
log_debug!(self.logger, "Handling SendClosingSigned event in peer_handler for node {} for channel {}",
log_pubkey!(node_id),
log_bytes!(msg.channel_id));
- self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
},
MessageSendEvent::SendShutdown { ref node_id, ref msg } => {
log_debug!(self.logger, "Handling Shutdown event in peer_handler for node {} for channel {}",
log_pubkey!(node_id),
log_bytes!(msg.channel_id));
- self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
},
MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
log_debug!(self.logger, "Handling SendChannelReestablish event in peer_handler for node {} for channel {}",
log_pubkey!(node_id),
log_bytes!(msg.channel_id));
- self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
},
MessageSendEvent::BroadcastChannelAnnouncement { msg, update_msg } => {
log_debug!(self.logger, "Handling BroadcastChannelAnnouncement event in peer_handler for short channel id {}", msg.contents.short_channel_id);
MessageSendEvent::SendChannelUpdate { ref node_id, ref msg } => {
log_trace!(self.logger, "Handling SendChannelUpdate event in peer_handler for node {} for channel {}",
log_pubkey!(node_id), msg.contents.short_channel_id);
- let peer = get_peer_for_forwarding!(node_id);
- peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg)));
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
},
MessageSendEvent::HandleError { ref node_id, ref action } => {
match *action {
msgs::ErrorAction::DisconnectPeer { ref msg } => {
- if let Some(mut descriptor) = peers.node_id_to_descriptor.remove(node_id) {
- if let Some(mut peer) = peers.peers.remove(&descriptor) {
- if let Some(ref msg) = *msg {
- log_trace!(self.logger, "Handling DisconnectPeer HandleError event in peer_handler for node {} with message {}",
- log_pubkey!(node_id),
- msg.data);
- self.enqueue_message(&mut peer, msg);
- // This isn't guaranteed to work, but if there is enough free
- // room in the send buffer, put the error message there...
- self.do_attempt_write_data(&mut descriptor, &mut peer);
- } else {
- log_gossip!(self.logger, "Handling DisconnectPeer HandleError event in peer_handler for node {} with no message", log_pubkey!(node_id));
- }
- }
- descriptor.disconnect_socket();
- self.message_handler.chan_handler.peer_disconnected(&node_id, false);
- }
+ // We do not have the peers write lock, so we just store that we're
+ // about to disconenct the peer and do it after we finish
+ // processing most messages.
+ peers_to_disconnect.insert(*node_id, msg.clone());
},
msgs::ErrorAction::IgnoreAndLog(level) => {
log_given_level!(self.logger, level, "Received a HandleError event to be ignored for node {}", log_pubkey!(node_id));
log_trace!(self.logger, "Handling SendErrorMessage HandleError event in peer_handler for node {} with message {}",
log_pubkey!(node_id),
msg.data);
- self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
},
msgs::ErrorAction::SendWarningMessage { ref msg, ref log_level } => {
log_given_level!(self.logger, *log_level, "Handling SendWarningMessage HandleError event in peer_handler for node {} with message {}",
log_pubkey!(node_id),
msg.data);
- self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
},
}
},
MessageSendEvent::SendChannelRangeQuery { ref node_id, ref msg } => {
- self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
},
MessageSendEvent::SendShortIdsQuery { ref node_id, ref msg } => {
- self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
}
MessageSendEvent::SendReplyChannelRange { ref node_id, ref msg } => {
log_gossip!(self.logger, "Handling SendReplyChannelRange event in peer_handler for node {} with num_scids={} first_blocknum={} number_of_blocks={}, sync_complete={}",
msg.first_blocknum,
msg.number_of_blocks,
msg.sync_complete);
- self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
}
MessageSendEvent::SendGossipTimestampFilter { ref node_id, ref msg } => {
- self.enqueue_message(get_peer_for_forwarding!(node_id), msg);
+ self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg);
}
}
}
for (node_id, msg) in self.custom_message_handler.get_and_clear_pending_msg() {
- self.enqueue_message(get_peer_for_forwarding!(&node_id), &msg);
+ if peers_to_disconnect.get(&node_id).is_some() { continue; }
+ self.enqueue_message(&mut *get_peer_for_forwarding!(&node_id), &msg);
}
- for (descriptor, peer) in peers.peers.iter_mut() {
- self.do_attempt_write_data(&mut (*descriptor).clone(), peer);
+ for (descriptor, peer_mutex) in peers.iter() {
+ self.do_attempt_write_data(&mut (*descriptor).clone(), &mut *peer_mutex.lock().unwrap());
+ }
+ }
+ if !peers_to_disconnect.is_empty() {
+ let mut peers_lock = self.peers.write().unwrap();
+ let peers = &mut *peers_lock;
+ for (node_id, msg) in peers_to_disconnect.drain() {
+ // Note that since we are holding the peers *write* lock we can
+ // remove from node_id_to_descriptor immediately (as no other
+ // thread can be holding the peer lock if we have the global write
+ // lock).
+
+ if let Some(mut descriptor) = self.node_id_to_descriptor.lock().unwrap().remove(&node_id) {
+ if let Some(peer_mutex) = peers.remove(&descriptor) {
+ if let Some(msg) = msg {
+ log_trace!(self.logger, "Handling DisconnectPeer HandleError event in peer_handler for node {} with message {}",
+ log_pubkey!(node_id),
+ msg.data);
+ let mut peer = peer_mutex.lock().unwrap();
+ self.enqueue_message(&mut *peer, &msg);
+ // This isn't guaranteed to work, but if there is enough free
+ // room in the send buffer, put the error message there...
+ self.do_attempt_write_data(&mut descriptor, &mut *peer);
+ } else {
+ log_trace!(self.logger, "Handling DisconnectPeer HandleError event in peer_handler for node {} with no message", log_pubkey!(node_id));
+ }
+ }
+ descriptor.disconnect_socket();
+ self.message_handler.chan_handler.peer_disconnected(&node_id, false);
+ }
}
}
}
}
fn disconnect_event_internal(&self, descriptor: &Descriptor, no_connection_possible: bool) {
- let mut peers = self.peers.lock().unwrap();
- let peer_option = peers.peers.remove(descriptor);
+ let mut peers = self.peers.write().unwrap();
+ let peer_option = peers.remove(descriptor);
match peer_option {
None => {
// This is most likely a simple race condition where the user found that the socket
// was disconnected, then we told the user to `disconnect_socket()`, then they
// called this method. Either way we're disconnected, return.
},
- Some(peer) => {
- match peer.their_node_id {
- Some(node_id) => {
- log_trace!(self.logger,
- "Handling disconnection of peer {}, with {}future connection to the peer possible.",
- log_pubkey!(node_id), if no_connection_possible { "no " } else { "" });
- peers.node_id_to_descriptor.remove(&node_id);
- self.message_handler.chan_handler.peer_disconnected(&node_id, no_connection_possible);
- },
- None => {}
+ Some(peer_lock) => {
+ let peer = peer_lock.lock().unwrap();
+ if let Some(node_id) = peer.their_node_id {
+ log_trace!(self.logger,
+ "Handling disconnection of peer {}, with {}future connection to the peer possible.",
+ log_pubkey!(node_id), if no_connection_possible { "no " } else { "" });
+ self.node_id_to_descriptor.lock().unwrap().remove(&node_id);
+ self.message_handler.chan_handler.peer_disconnected(&node_id, no_connection_possible);
}
}
};
///
/// [`disconnect_socket`]: SocketDescriptor::disconnect_socket
pub fn disconnect_by_node_id(&self, node_id: PublicKey, no_connection_possible: bool) {
- let mut peers_lock = self.peers.lock().unwrap();
- if let Some(mut descriptor) = peers_lock.node_id_to_descriptor.remove(&node_id) {
+ let mut peers_lock = self.peers.write().unwrap();
+ if let Some(mut descriptor) = self.node_id_to_descriptor.lock().unwrap().remove(&node_id) {
log_trace!(self.logger, "Disconnecting peer with id {} due to client request", node_id);
- peers_lock.peers.remove(&descriptor);
+ peers_lock.remove(&descriptor);
self.message_handler.chan_handler.peer_disconnected(&node_id, no_connection_possible);
descriptor.disconnect_socket();
}
/// an indication that TCP sockets have stalled even if we weren't around to time them out
/// using regular ping/pongs.
pub fn disconnect_all_peers(&self) {
- let mut peers_lock = self.peers.lock().unwrap();
+ let mut peers_lock = self.peers.write().unwrap();
+ self.node_id_to_descriptor.lock().unwrap().clear();
let peers = &mut *peers_lock;
- for (mut descriptor, peer) in peers.peers.drain() {
- if let Some(node_id) = peer.their_node_id {
+ for (mut descriptor, peer) in peers.drain() {
+ if let Some(node_id) = peer.lock().unwrap().their_node_id {
log_trace!(self.logger, "Disconnecting peer with id {} due to client request to disconnect all peers", node_id);
- peers.node_id_to_descriptor.remove(&node_id);
self.message_handler.chan_handler.peer_disconnected(&node_id, false);
}
descriptor.disconnect_socket();
}
- debug_assert!(peers.node_id_to_descriptor.is_empty());
}
/// This is called when we're blocked on sending additional gossip messages until we receive a
///
/// [`send_data`]: SocketDescriptor::send_data
pub fn timer_tick_occurred(&self) {
- let mut peers_lock = self.peers.lock().unwrap();
+ let mut descriptors_needing_disconnect = Vec::new();
{
- let peers = &mut *peers_lock;
- let node_id_to_descriptor = &mut peers.node_id_to_descriptor;
- let peers = &mut peers.peers;
- let mut descriptors_needing_disconnect = Vec::new();
- let peer_count = peers.len();
+ let peers_lock = self.peers.read().unwrap();
- peers.retain(|descriptor, peer| {
- let mut do_disconnect_peer = false;
+ for (descriptor, peer_mutex) in peers_lock.iter() {
+ let mut peer = peer_mutex.lock().unwrap();
if !peer.channel_encryptor.is_ready_for_encryption() || peer.their_node_id.is_none() {
// The peer needs to complete its handshake before we can exchange messages. We
// give peers one timer tick to complete handshake, reusing
// `awaiting_pong_timer_tick_intervals` to track number of timer ticks taken
// for handshake completion.
if peer.awaiting_pong_timer_tick_intervals != 0 {
- do_disconnect_peer = true;
+ descriptors_needing_disconnect.push(descriptor.clone());
} else {
peer.awaiting_pong_timer_tick_intervals = 1;
- return true;
}
+ continue;
}
if peer.awaiting_pong_timer_tick_intervals == -1 {
// Magic value set in `maybe_send_extra_ping`.
peer.awaiting_pong_timer_tick_intervals = 1;
peer.received_message_since_timer_tick = false;
- return true;
+ continue;
}
- if do_disconnect_peer
- || (peer.awaiting_pong_timer_tick_intervals > 0 && !peer.received_message_since_timer_tick)
+ if (peer.awaiting_pong_timer_tick_intervals > 0 && !peer.received_message_since_timer_tick)
|| peer.awaiting_pong_timer_tick_intervals as u64 >
- MAX_BUFFER_DRAIN_TICK_INTERVALS_PER_PEER as u64 * peer_count as u64
+ MAX_BUFFER_DRAIN_TICK_INTERVALS_PER_PEER as u64 * peers_lock.len() as u64
{
descriptors_needing_disconnect.push(descriptor.clone());
- match peer.their_node_id {
- Some(node_id) => {
- log_trace!(self.logger, "Disconnecting peer with id {} due to ping timeout", node_id);
- node_id_to_descriptor.remove(&node_id);
- self.message_handler.chan_handler.peer_disconnected(&node_id, false);
- }
- None => {},
- }
- return false;
+ continue;
}
peer.received_message_since_timer_tick = false;
if peer.awaiting_pong_timer_tick_intervals > 0 {
peer.awaiting_pong_timer_tick_intervals += 1;
- return true;
+ continue;
}
peer.awaiting_pong_timer_tick_intervals = 1;
ponglen: 0,
byteslen: 64,
};
- self.enqueue_message(peer, &ping);
+ self.enqueue_message(&mut *peer, &ping);
self.do_attempt_write_data(&mut (descriptor.clone()), &mut *peer);
+ }
+ }
- true
- });
+ if !descriptors_needing_disconnect.is_empty() {
+ {
+ let mut peers_lock = self.peers.write().unwrap();
+ for descriptor in descriptors_needing_disconnect.iter() {
+ if let Some(peer) = peers_lock.remove(descriptor) {
+ if let Some(node_id) = peer.lock().unwrap().their_node_id {
+ log_trace!(self.logger, "Disconnecting peer with id {} due to ping timeout", node_id);
+ self.node_id_to_descriptor.lock().unwrap().remove(&node_id);
+ self.message_handler.chan_handler.peer_disconnected(&node_id, false);
+ }
+ }
+ }
+ }
for mut descriptor in descriptors_needing_disconnect.drain(..) {
descriptor.disconnect_socket();
#[cfg(test)]
mod tests {
use ln::peer_handler::{PeerManager, MessageHandler, SocketDescriptor, IgnoringMessageHandler, filter_addresses};
- use ln::msgs;
+ use ln::{msgs, wire};
use ln::msgs::NetAddress;
use util::events;
use util::test_utils;
let chan_handler = test_utils::TestChannelMessageHandler::new();
let mut peers = create_network(2, &cfgs);
establish_connection(&peers[0], &peers[1]);
- assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1);
+ assert_eq!(peers[0].peers.read().unwrap().len(), 1);
let secp_ctx = Secp256k1::new();
let their_id = PublicKey::from_secret_key(&secp_ctx, &peers[1].our_node_secret);
peers[0].message_handler.chan_handler = &chan_handler;
peers[0].process_events();
- assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 0);
+ assert_eq!(peers[0].peers.read().unwrap().len(), 0);
+ }
+
+ #[test]
+ fn test_send_simple_msg() {
+ // Simple test which builds a network of PeerManager, connects and brings them to NoiseState::Finished and
+ // push a message from one peer to another.
+ let cfgs = create_peermgr_cfgs(2);
+ let a_chan_handler = test_utils::TestChannelMessageHandler::new();
+ let b_chan_handler = test_utils::TestChannelMessageHandler::new();
+ let mut peers = create_network(2, &cfgs);
+ let (fd_a, mut fd_b) = establish_connection(&peers[0], &peers[1]);
+ assert_eq!(peers[0].peers.read().unwrap().len(), 1);
+
+ let secp_ctx = Secp256k1::new();
+ let their_id = PublicKey::from_secret_key(&secp_ctx, &peers[1].our_node_secret);
+
+ let msg = msgs::Shutdown { channel_id: [42; 32], scriptpubkey: bitcoin::Script::new() };
+ a_chan_handler.pending_events.lock().unwrap().push(events::MessageSendEvent::SendShutdown {
+ node_id: their_id, msg: msg.clone()
+ });
+ peers[0].message_handler.chan_handler = &a_chan_handler;
+
+ b_chan_handler.expect_receive_msg(wire::Message::Shutdown(msg));
+ peers[1].message_handler.chan_handler = &b_chan_handler;
+
+ peers[0].process_events();
+
+ let a_data = fd_a.outbound_data.lock().unwrap().split_off(0);
+ assert_eq!(peers[1].read_event(&mut fd_b, &a_data).unwrap(), false);
+ }
+
+ #[test]
+ fn test_disconnect_all_peer() {
+ // Simple test which builds a network of PeerManager, connects and brings them to NoiseState::Finished and
+ // then calls disconnect_all_peers
+ let cfgs = create_peermgr_cfgs(2);
+ let peers = create_network(2, &cfgs);
+ establish_connection(&peers[0], &peers[1]);
+ assert_eq!(peers[0].peers.read().unwrap().len(), 1);
+
+ peers[0].disconnect_all_peers();
+ assert_eq!(peers[0].peers.read().unwrap().len(), 0);
}
#[test]
let cfgs = create_peermgr_cfgs(2);
let peers = create_network(2, &cfgs);
establish_connection(&peers[0], &peers[1]);
- assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1);
+ assert_eq!(peers[0].peers.read().unwrap().len(), 1);
// peers[0] awaiting_pong is set to true, but the Peer is still connected
peers[0].timer_tick_occurred();
peers[0].process_events();
- assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1);
+ assert_eq!(peers[0].peers.read().unwrap().len(), 1);
// Since timer_tick_occurred() is called again when awaiting_pong is true, all Peers are disconnected
peers[0].timer_tick_occurred();
peers[0].process_events();
- assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 0);
+ assert_eq!(peers[0].peers.read().unwrap().len(), 0);
}
#[test]
peers[0].new_inbound_connection(fd_a.clone(), None).unwrap();
// If we get a single timer tick before completion, that's fine
- assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1);
+ assert_eq!(peers[0].peers.read().unwrap().len(), 1);
peers[0].timer_tick_occurred();
- assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1);
+ assert_eq!(peers[0].peers.read().unwrap().len(), 1);
assert_eq!(peers[0].read_event(&mut fd_a, &initial_data).unwrap(), false);
peers[0].process_events();
// ...but if we get a second timer tick, we should disconnect the peer
peers[0].timer_tick_occurred();
- assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 0);
+ assert_eq!(peers[0].peers.read().unwrap().len(), 0);
assert!(peers[0].read_event(&mut fd_a, &fd_b.outbound_data.lock().unwrap().split_off(0)).is_err());
}
projects / rust-lightning / commitdiff