X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fln%2Fpeer_handler.rs;h=1a39bbb3ae408e7047159e6d9f3f63267188b61f;hb=7cfafc98ba2429c6505ad11d9296e1ffe35cf60f;hp=913ece6462add4573bc146e48a39f88c2208e6c8;hpb=14ee173593e6ee5501e10767ffa6ce1533a9bb2e;p=rust-lightning diff --git a/lightning/src/ln/peer_handler.rs b/lightning/src/ln/peer_handler.rs index 913ece64..1a39bbb3 100644 --- a/lightning/src/ln/peer_handler.rs +++ b/lightning/src/ln/peer_handler.rs @@ -15,9 +15,11 @@ //! call into the provided message handlers (probably a ChannelManager and P2PGossipSync) with //! messages they should handle, and encoding/sending response messages. +use bitcoin::blockdata::constants::ChainHash; use bitcoin::secp256k1::{self, Secp256k1, SecretKey, PublicKey}; -use crate::chain::keysinterface::{KeysManager, NodeSigner, Recipient}; +use crate::sign::{KeysManager, NodeSigner, Recipient}; +use crate::events::{MessageSendEvent, MessageSendEventsProvider, OnionMessageProvider}; use crate::ln::features::{InitFeatures, NodeFeatures}; use crate::ln::msgs; use crate::ln::msgs::{ChannelMessageHandler, LightningError, NetAddress, OnionMessageHandler, RoutingMessageHandler}; @@ -25,18 +27,18 @@ use crate::ln::channelmanager::{SimpleArcChannelManager, SimpleRefChannelManager use crate::util::ser::{VecWriter, Writeable, Writer}; use crate::ln::peer_channel_encryptor::{PeerChannelEncryptor,NextNoiseStep}; use crate::ln::wire; -use crate::ln::wire::Encode; -use crate::onion_message::{CustomOnionMessageContents, CustomOnionMessageHandler, SimpleArcOnionMessenger, SimpleRefOnionMessenger}; -use crate::routing::gossip::{NetworkGraph, P2PGossipSync, NodeId}; +use crate::ln::wire::{Encode, Type}; +use crate::onion_message::{CustomOnionMessageContents, CustomOnionMessageHandler, OffersMessage, OffersMessageHandler, SimpleArcOnionMessenger, SimpleRefOnionMessenger}; +use crate::routing::gossip::{NetworkGraph, P2PGossipSync, NodeId, NodeAlias}; use crate::util::atomic_counter::AtomicCounter; -use crate::util::events::{MessageSendEvent, MessageSendEventsProvider, OnionMessageProvider}; use crate::util::logger::Logger; +use crate::util::string::PrintableString; use crate::prelude::*; use crate::io; use alloc::collections::LinkedList; use crate::sync::{Arc, Mutex, MutexGuard, FairRwLock}; -use core::sync::atomic::{AtomicBool, AtomicU32, Ordering}; +use core::sync::atomic::{AtomicBool, AtomicU32, AtomicI32, Ordering}; use core::{cmp, hash, fmt, mem}; use core::ops::Deref; use core::convert::Infallible; @@ -64,6 +66,20 @@ pub trait CustomMessageHandler: wire::CustomMessageReader { /// in the process. Each message is paired with the node id of the intended recipient. If no /// connection to the node exists, then the message is simply not sent. fn get_and_clear_pending_msg(&self) -> Vec<(PublicKey, Self::CustomMessage)>; + + /// Gets the node feature flags which this handler itself supports. All available handlers are + /// queried similarly and their feature flags are OR'd together to form the [`NodeFeatures`] + /// which are broadcasted in our [`NodeAnnouncement`] message. + /// + /// [`NodeAnnouncement`]: crate::ln::msgs::NodeAnnouncement + fn provided_node_features(&self) -> NodeFeatures; + + /// Gets the init feature flags which should be sent to the given peer. All available handlers + /// are queried similarly and their feature flags are OR'd together to form the [`InitFeatures`] + /// which are sent in our [`Init`] message. + /// + /// [`Init`]: crate::ln::msgs::Init + fn provided_init_features(&self, their_node_id: &PublicKey) -> InitFeatures; } /// A dummy struct which implements `RoutingMessageHandler` without storing any routing information @@ -102,9 +118,12 @@ impl OnionMessageHandler for IgnoringMessageHandler { InitFeatures::empty() } } +impl OffersMessageHandler for IgnoringMessageHandler { + fn handle_message(&self, _msg: OffersMessage) -> Option { None } +} impl CustomOnionMessageHandler for IgnoringMessageHandler { type CustomMessage = Infallible; - fn handle_custom_message(&self, _msg: Infallible) { + fn handle_custom_message(&self, _msg: Infallible) -> Option { // Since we always return `None` in the read the handle method should never be called. unreachable!(); } @@ -149,6 +168,12 @@ impl CustomMessageHandler for IgnoringMessageHandler { } fn get_and_clear_pending_msg(&self) -> Vec<(PublicKey, Self::CustomMessage)> { Vec::new() } + + fn provided_node_features(&self) -> NodeFeatures { NodeFeatures::empty() } + + fn provided_init_features(&self, _their_node_id: &PublicKey) -> InitFeatures { + InitFeatures::empty() + } } /// A dummy struct which implements `ChannelMessageHandler` without having any channels. @@ -252,17 +277,70 @@ impl ChannelMessageHandler for ErroringMessageHandler { features.set_zero_conf_optional(); features } + + fn get_genesis_hashes(&self) -> Option> { + // We don't enforce any chains upon peer connection for `ErroringMessageHandler` and leave it up + // to users of `ErroringMessageHandler` to make decisions on network compatiblility. + // There's not really any way to pull in specific networks here, and hardcoding can cause breakages. + None + } + + fn handle_open_channel_v2(&self, their_node_id: &PublicKey, msg: &msgs::OpenChannelV2) { + ErroringMessageHandler::push_error(self, their_node_id, msg.temporary_channel_id); + } + + fn handle_accept_channel_v2(&self, their_node_id: &PublicKey, msg: &msgs::AcceptChannelV2) { + ErroringMessageHandler::push_error(self, their_node_id, msg.temporary_channel_id); + } + + fn handle_tx_add_input(&self, their_node_id: &PublicKey, msg: &msgs::TxAddInput) { + ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id); + } + + fn handle_tx_add_output(&self, their_node_id: &PublicKey, msg: &msgs::TxAddOutput) { + ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id); + } + + fn handle_tx_remove_input(&self, their_node_id: &PublicKey, msg: &msgs::TxRemoveInput) { + ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id); + } + + fn handle_tx_remove_output(&self, their_node_id: &PublicKey, msg: &msgs::TxRemoveOutput) { + ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id); + } + + fn handle_tx_complete(&self, their_node_id: &PublicKey, msg: &msgs::TxComplete) { + ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id); + } + + fn handle_tx_signatures(&self, their_node_id: &PublicKey, msg: &msgs::TxSignatures) { + ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id); + } + + fn handle_tx_init_rbf(&self, their_node_id: &PublicKey, msg: &msgs::TxInitRbf) { + ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id); + } + + fn handle_tx_ack_rbf(&self, their_node_id: &PublicKey, msg: &msgs::TxAckRbf) { + ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id); + } + + fn handle_tx_abort(&self, their_node_id: &PublicKey, msg: &msgs::TxAbort) { + ErroringMessageHandler::push_error(self, their_node_id, msg.channel_id); + } } + impl Deref for ErroringMessageHandler { type Target = ErroringMessageHandler; fn deref(&self) -> &Self { self } } /// Provides references to trait impls which handle different types of messages. -pub struct MessageHandler where - CM::Target: ChannelMessageHandler, - RM::Target: RoutingMessageHandler, - OM::Target: OnionMessageHandler, +pub struct MessageHandler where + CM::Target: ChannelMessageHandler, + RM::Target: RoutingMessageHandler, + OM::Target: OnionMessageHandler, + CustomM::Target: CustomMessageHandler, { /// A message handler which handles messages specific to channels. Usually this is just a /// [`ChannelManager`] object or an [`ErroringMessageHandler`]. @@ -275,9 +353,15 @@ pub struct MessageHandler where /// [`P2PGossipSync`]: crate::routing::gossip::P2PGossipSync pub route_handler: RM, - /// A message handler which handles onion messages. For now, this can only be an - /// [`IgnoringMessageHandler`]. + /// A message handler which handles onion messages. This should generally be an + /// [`OnionMessenger`], but can also be an [`IgnoringMessageHandler`]. + /// + /// [`OnionMessenger`]: crate::onion_message::OnionMessenger pub onion_message_handler: OM, + + /// A message handler which handles custom messages. The only LDK-provided implementation is + /// [`IgnoringMessageHandler`]. + pub custom_message_handler: CustomM, } /// Provides an object which can be used to send data to and which uniquely identifies a connection @@ -416,7 +500,7 @@ struct Peer { sync_status: InitSyncTracker, msgs_sent_since_pong: usize, - awaiting_pong_timer_tick_intervals: i8, + awaiting_pong_timer_tick_intervals: i64, received_message_since_timer_tick: bool, sent_gossip_timestamp_filter: bool, @@ -522,8 +606,16 @@ impl Peer { /// SimpleRefPeerManager is the more appropriate type. Defining these type aliases prevents /// issues such as overly long function definitions. /// -/// (C-not exported) as `Arc`s don't make sense in bindings. -pub type SimpleArcPeerManager = PeerManager>, Arc>>, Arc, Arc>>, Arc>, Arc, IgnoringMessageHandler, Arc>; +/// This is not exported to bindings users as `Arc`s don't make sense in bindings. +pub type SimpleArcPeerManager = PeerManager< + SD, + Arc>, + Arc>>, Arc, Arc>>, + Arc>, + Arc, + IgnoringMessageHandler, + Arc +>; /// SimpleRefPeerManager is a type alias for a PeerManager reference, and is the reference /// counterpart to the SimpleArcPeerManager type alias. Use this type by default when you don't @@ -532,8 +624,69 @@ pub type SimpleArcPeerManager = PeerManager = PeerManager, &'f P2PGossipSync<&'g NetworkGraph<&'f L>, &'h C, &'f L>, &'i SimpleRefOnionMessenger<'j, 'k, L>, &'f L, IgnoringMessageHandler, &'c KeysManager>; +/// This is not exported to bindings users as general type aliases don't make sense in bindings. +pub type SimpleRefPeerManager< + 'a, 'b, 'c, 'd, 'e, 'f, 'g, 'h, 'i, 'j, 'k, 'l, 'm, 'n, SD, M, T, F, C, L +> = PeerManager< + SD, + &'n SimpleRefChannelManager<'a, 'b, 'c, 'd, 'e, 'f, 'g, 'm, M, T, F, L>, + &'f P2PGossipSync<&'g NetworkGraph<&'f L>, &'h C, &'f L>, + &'i SimpleRefOnionMessenger<'g, 'm, 'n, L>, + &'f L, + IgnoringMessageHandler, + &'c KeysManager +>; + + +/// A generic trait which is implemented for all [`PeerManager`]s. This makes bounding functions or +/// structs on any [`PeerManager`] much simpler as only this trait is needed as a bound, rather +/// than the full set of bounds on [`PeerManager`] itself. +/// +/// This is not exported to bindings users as general cover traits aren't useful in other +/// languages. +#[allow(missing_docs)] +pub trait APeerManager { + type Descriptor: SocketDescriptor; + type CMT: ChannelMessageHandler + ?Sized; + type CM: Deref; + type RMT: RoutingMessageHandler + ?Sized; + type RM: Deref; + type OMT: OnionMessageHandler + ?Sized; + type OM: Deref; + type LT: Logger + ?Sized; + type L: Deref; + type CMHT: CustomMessageHandler + ?Sized; + type CMH: Deref; + type NST: NodeSigner + ?Sized; + type NS: Deref; + /// Gets a reference to the underlying [`PeerManager`]. + fn as_ref(&self) -> &PeerManager; +} + +impl +APeerManager for PeerManager where + CM::Target: ChannelMessageHandler, + RM::Target: RoutingMessageHandler, + OM::Target: OnionMessageHandler, + L::Target: Logger, + CMH::Target: CustomMessageHandler, + NS::Target: NodeSigner, +{ + type Descriptor = Descriptor; + type CMT = ::Target; + type CM = CM; + type RMT = ::Target; + type RM = RM; + type OMT = ::Target; + type OM = OM; + type LT = ::Target; + type L = L; + type CMHT = ::Target; + type CMH = CMH; + type NST = ::Target; + type NS = NS; + fn as_ref(&self) -> &PeerManager { self } +} /// A PeerManager manages a set of peers, described by their [`SocketDescriptor`] and marshalls /// socket events into messages which it passes on to its [`MessageHandler`]. @@ -561,7 +714,7 @@ pub struct PeerManager, + message_handler: MessageHandler, /// 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. @@ -576,22 +729,24 @@ pub struct PeerManager>, - /// 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, + /// We can only have one thread processing events at once, but if a second call to + /// `process_events` happens while a first call is in progress, one of the two calls needs to + /// start from the top to ensure any new messages are also handled. + /// + /// Because the event handler calls into user code which may block, we don't want to block a + /// second thread waiting for another thread to handle events which is then blocked on user + /// code, so we store an atomic counter here: + /// * 0 indicates no event processor is running + /// * 1 indicates an event processor is running + /// * > 1 indicates an event processor is running but needs to start again from the top once + /// it finishes as another thread tried to start processing events but returned early. + event_processing_state: AtomicI32, /// Used to track the last value sent in a node_announcement "timestamp" field. We ensure this /// value increases strictly since we don't assume access to a time source. last_node_announcement_serial: AtomicU32, ephemeral_key_midstate: Sha256Engine, - custom_message_handler: CMH, peer_counter: AtomicCounter, @@ -646,13 +801,14 @@ impl Pe /// timestamp, however if it is not available a persistent counter that increases once per /// minute should suffice. /// - /// (C-not exported) as we can't export a PeerManager with a dummy route handler + /// This is not exported to bindings users as we can't export a PeerManager with a dummy route handler pub fn new_channel_only(channel_message_handler: CM, onion_message_handler: OM, current_time: u32, ephemeral_random_data: &[u8; 32], logger: L, node_signer: NS) -> Self { Self::new(MessageHandler { chan_handler: channel_message_handler, route_handler: IgnoringMessageHandler{}, onion_message_handler, - }, current_time, ephemeral_random_data, logger, IgnoringMessageHandler{}, node_signer) + custom_message_handler: IgnoringMessageHandler{}, + }, current_time, ephemeral_random_data, logger, node_signer) } } @@ -673,13 +829,14 @@ impl PeerManager Self { Self::new(MessageHandler { chan_handler: ErroringMessageHandler::new(), route_handler: routing_message_handler, onion_message_handler: IgnoringMessageHandler{}, - }, current_time, ephemeral_random_data, logger, IgnoringMessageHandler{}, node_signer) + custom_message_handler: IgnoringMessageHandler{}, + }, current_time, ephemeral_random_data, logger, node_signer) } } @@ -741,7 +898,7 @@ impl, current_time: u32, ephemeral_random_data: &[u8; 32], logger: L, custom_message_handler: CMH, node_signer: NS) -> Self { + pub fn new(message_handler: MessageHandler, current_time: u32, ephemeral_random_data: &[u8; 32], logger: L, node_signer: NS) -> Self { let mut ephemeral_key_midstate = Sha256::engine(); ephemeral_key_midstate.input(ephemeral_random_data); @@ -753,15 +910,13 @@ impl InitFeatures { + self.message_handler.chan_handler.provided_init_features(their_node_id) + | self.message_handler.route_handler.provided_init_features(their_node_id) + | self.message_handler.onion_message_handler.provided_init_features(their_node_id) + | self.message_handler.custom_message_handler.provided_init_features(their_node_id) + } + /// Indicates a new outbound connection has been established to a node with the given `node_id` /// and an optional remote network address. /// @@ -1056,7 +1218,7 @@ impl Ok(res), Err(e) => { - log_trace!(self.logger, "Peer sent invalid data or we decided to disconnect due to a protocol error"); + log_trace!(self.logger, "Disconnecting peer due to a protocol error (usually a duplicate connection)."); self.disconnect_event_internal(peer_descriptor); Err(e) } @@ -1101,8 +1263,21 @@ impl x, Err(e) => { match e.action { - msgs::ErrorAction::DisconnectPeer { msg: _ } => { - //TODO: Try to push msg + msgs::ErrorAction::DisconnectPeer { .. } => { + // We may have an `ErrorMessage` to send to the peer, + // but writing to the socket while reading can lead to + // re-entrant code and possibly unexpected behavior. The + // message send is optimistic anyway, and in this case + // we immediately disconnect the peer. + log_debug!(self.logger, "Error handling message{}; disconnecting peer with: {}", OptionalFromDebugger(&peer_node_id), e.err); + return Err(PeerHandleError { }); + }, + msgs::ErrorAction::DisconnectPeerWithWarning { .. } => { + // We have a `WarningMessage` to send to the peer, but + // writing to the socket while reading can lead to + // re-entrant code and possibly unexpected behavior. The + // message send is optimistic anyway, and in this case + // we immediately disconnect the peer. log_debug!(self.logger, "Error handling message{}; disconnecting peer with: {}", OptionalFromDebugger(&peer_node_id), e.err); return Err(PeerHandleError { }); }, @@ -1190,10 +1365,9 @@ impl x, Err(e) => { match e { - // Note that to avoid recursion we never call + // Note that to avoid re-entrancy we never call // `do_attempt_write_data` from here, causing // the messages enqueued here to not actually // be sent before the peer is disconnected. @@ -1258,9 +1431,8 @@ impl { - 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) }); + (msgs::DecodeError::UnknownRequiredFeature, _) => { + log_debug!(self.logger, "Received a message with an unknown required feature flag or TLV, you may want to update!"); return Err(PeerHandleError { }); } (msgs::DecodeError::UnknownVersion, _) => return Err(PeerHandleError { }), @@ -1323,10 +1495,36 @@ impl { - let mut data_is_printable = true; - for b in msg.data.bytes() { - if b < 32 || b > 126 { - data_is_printable = false; - break; - } - } - - if data_is_printable { - 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!(their_node_id)); - } + log_debug!(self.logger, "Got Err message from {}: {}", log_pubkey!(their_node_id), PrintableString(&msg.data)); self.message_handler.chan_handler.handle_error(&their_node_id, &msg); if msg.channel_id == [0; 32] { return Err(PeerHandleError { }.into()); } }, wire::Message::Warning(msg) => { - let mut data_is_printable = true; - for b in msg.data.bytes() { - if b < 32 || b > 126 { - data_is_printable = false; - break; - } - } - - if data_is_printable { - 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!(their_node_id)); - } + log_debug!(self.logger, "Got warning message from {}: {}", log_pubkey!(their_node_id), PrintableString(&msg.data)); }, wire::Message::Ping(msg) => { @@ -1442,9 +1616,15 @@ impl { self.message_handler.chan_handler.handle_open_channel(&their_node_id, &msg); }, + wire::Message::OpenChannelV2(msg) => { + self.message_handler.chan_handler.handle_open_channel_v2(&their_node_id, &msg); + }, wire::Message::AcceptChannel(msg) => { self.message_handler.chan_handler.handle_accept_channel(&their_node_id, &msg); }, + wire::Message::AcceptChannelV2(msg) => { + self.message_handler.chan_handler.handle_accept_channel_v2(&their_node_id, &msg); + }, wire::Message::FundingCreated(msg) => { self.message_handler.chan_handler.handle_funding_created(&their_node_id, &msg); @@ -1456,6 +1636,35 @@ impl { + self.message_handler.chan_handler.handle_tx_add_input(&their_node_id, &msg); + }, + wire::Message::TxAddOutput(msg) => { + self.message_handler.chan_handler.handle_tx_add_output(&their_node_id, &msg); + }, + wire::Message::TxRemoveInput(msg) => { + self.message_handler.chan_handler.handle_tx_remove_input(&their_node_id, &msg); + }, + wire::Message::TxRemoveOutput(msg) => { + self.message_handler.chan_handler.handle_tx_remove_output(&their_node_id, &msg); + }, + wire::Message::TxComplete(msg) => { + self.message_handler.chan_handler.handle_tx_complete(&their_node_id, &msg); + }, + wire::Message::TxSignatures(msg) => { + self.message_handler.chan_handler.handle_tx_signatures(&their_node_id, &msg); + }, + wire::Message::TxInitRbf(msg) => { + self.message_handler.chan_handler.handle_tx_init_rbf(&their_node_id, &msg); + }, + wire::Message::TxAckRbf(msg) => { + self.message_handler.chan_handler.handle_tx_ack_rbf(&their_node_id, &msg); + }, + wire::Message::TxAbort(msg) => { + self.message_handler.chan_handler.handle_tx_abort(&their_node_id, &msg); + } + wire::Message::Shutdown(msg) => { self.message_handler.chan_handler.handle_shutdown(&their_node_id, &msg); }, @@ -1543,7 +1752,7 @@ impl { - self.custom_message_handler.handle_custom_message(custom, &their_node_id)?; + self.message_handler.custom_message_handler.handle_custom_message(custom, &their_node_id)?; }, }; Ok(should_forward) @@ -1649,290 +1858,364 @@ impl { - 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); - } - } + if self.event_processing_state.fetch_add(1, Ordering::AcqRel) > 0 { + // If we're not the first event processor to get here, just return early, the increment + // we just did will be treated as "go around again" at the end. + return; } - self.update_gossip_backlogged(); - let flush_read_disabled = self.gossip_processing_backlog_lifted.swap(false, Ordering::Relaxed); - - 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()); + loop { + self.update_gossip_backlogged(); + let flush_read_disabled = self.gossip_processing_backlog_lifted.swap(false, Ordering::Relaxed); - { - // 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_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()); - let peers_lock = self.peers.read().unwrap(); - let peers = &*peers_lock; - macro_rules! get_peer_for_forwarding { - ($node_id: expr) => { - { - if peers_to_disconnect.get($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($node_id).cloned(); - match descriptor_opt { - Some(descriptor) => match peers.get(&descriptor) { - Some(peer_mutex) => { - let peer_lock = peer_mutex.lock().unwrap(); - if !peer_lock.handshake_complete() { + { + // TODO: There are some DoS attacks here where you can flood someone's outbound send + // buffer by doing things like announcing channels on another node. We should be willing to + // drop optional-ish messages when send buffers get full! + + let peers_lock = self.peers.read().unwrap(); + let peers = &*peers_lock; + macro_rules! get_peer_for_forwarding { + ($node_id: expr) => { + { + 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.handshake_complete() { + continue; + } + peer_lock + }, + None => { + debug_assert!(false, "Inconsistent peers set state!"); continue; } - peer_lock }, None => { - debug_assert!(false, "Inconsistent peers set state!"); continue; - } - }, - None => { - continue; - }, + }, + } } } } - } - for event in events_generated.drain(..) { - match event { - MessageSendEvent::SendAcceptChannel { ref node_id, ref msg } => { - 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(&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(&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_pubkey!(node_id), - log_bytes!(msg.temporary_channel_id), - 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(&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(&mut *get_peer_for_forwarding!(node_id), msg); - }, - MessageSendEvent::SendChannelReady { ref node_id, ref msg } => { - log_debug!(self.logger, "Handling SendChannelReady event in peer_handler for node {} for channel {}", - log_pubkey!(node_id), - log_bytes!(msg.channel_id)); - 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(&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 {}", - log_pubkey!(node_id), - update_add_htlcs.len(), - update_fulfill_htlcs.len(), - update_fail_htlcs.len(), - log_bytes!(commitment_signed.channel_id)); - let mut peer = get_peer_for_forwarding!(node_id); - for msg in update_add_htlcs { - self.enqueue_message(&mut *peer, msg); - } - for msg in update_fulfill_htlcs { - self.enqueue_message(&mut *peer, msg); - } - for msg in update_fail_htlcs { - self.enqueue_message(&mut *peer, msg); - } - for msg in update_fail_malformed_htlcs { - self.enqueue_message(&mut *peer, msg); - } - if let &Some(ref msg) = update_fee { - self.enqueue_message(&mut *peer, msg); - } - 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(&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(&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(&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(&mut *get_peer_for_forwarding!(node_id), msg); - }, - MessageSendEvent::SendChannelAnnouncement { ref node_id, ref msg, ref update_msg } => { - log_debug!(self.logger, "Handling SendChannelAnnouncement event in peer_handler for node {} for short channel id {}", - log_pubkey!(node_id), - msg.contents.short_channel_id); - self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); - self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), update_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); - match self.message_handler.route_handler.handle_channel_announcement(&msg) { - Ok(_) | Err(LightningError { action: msgs::ErrorAction::IgnoreDuplicateGossip, .. }) => - self.forward_broadcast_msg(peers, &wire::Message::ChannelAnnouncement(msg), None), - _ => {}, - } - if let Some(msg) = update_msg { + for event in events_generated.drain(..) { + match event { + MessageSendEvent::SendAcceptChannel { ref node_id, ref msg } => { + 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(&mut *get_peer_for_forwarding!(node_id), msg); + }, + MessageSendEvent::SendAcceptChannelV2 { ref node_id, ref msg } => { + log_debug!(self.logger, "Handling SendAcceptChannelV2 event in peer_handler for node {} for channel {}", + log_pubkey!(node_id), + log_bytes!(msg.temporary_channel_id)); + 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(&mut *get_peer_for_forwarding!(node_id), msg); + }, + MessageSendEvent::SendOpenChannelV2 { ref node_id, ref msg } => { + log_debug!(self.logger, "Handling SendOpenChannelV2 event in peer_handler for node {} for channel {}", + log_pubkey!(node_id), + log_bytes!(msg.temporary_channel_id)); + 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_pubkey!(node_id), + log_bytes!(msg.temporary_channel_id), + 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(&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(&mut *get_peer_for_forwarding!(node_id), msg); + }, + MessageSendEvent::SendChannelReady { ref node_id, ref msg } => { + log_debug!(self.logger, "Handling SendChannelReady event in peer_handler for node {} for channel {}", + log_pubkey!(node_id), + log_bytes!(msg.channel_id)); + self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); + }, + MessageSendEvent::SendTxAddInput { ref node_id, ref msg } => { + log_debug!(self.logger, "Handling SendTxAddInput event in peer_handler for node {} for channel {}", + log_pubkey!(node_id), + log_bytes!(msg.channel_id)); + self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); + }, + MessageSendEvent::SendTxAddOutput { ref node_id, ref msg } => { + log_debug!(self.logger, "Handling SendTxAddOutput event in peer_handler for node {} for channel {}", + log_pubkey!(node_id), + log_bytes!(msg.channel_id)); + self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); + }, + MessageSendEvent::SendTxRemoveInput { ref node_id, ref msg } => { + log_debug!(self.logger, "Handling SendTxRemoveInput event in peer_handler for node {} for channel {}", + log_pubkey!(node_id), + log_bytes!(msg.channel_id)); + self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); + }, + MessageSendEvent::SendTxRemoveOutput { ref node_id, ref msg } => { + log_debug!(self.logger, "Handling SendTxRemoveOutput event in peer_handler for node {} for channel {}", + log_pubkey!(node_id), + log_bytes!(msg.channel_id)); + self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); + }, + MessageSendEvent::SendTxComplete { ref node_id, ref msg } => { + log_debug!(self.logger, "Handling SendTxComplete event in peer_handler for node {} for channel {}", + log_pubkey!(node_id), + log_bytes!(msg.channel_id)); + self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); + }, + MessageSendEvent::SendTxSignatures { ref node_id, ref msg } => { + log_debug!(self.logger, "Handling SendTxSignatures event in peer_handler for node {} for channel {}", + log_pubkey!(node_id), + log_bytes!(msg.channel_id)); + self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); + }, + MessageSendEvent::SendTxInitRbf { ref node_id, ref msg } => { + log_debug!(self.logger, "Handling SendTxInitRbf event in peer_handler for node {} for channel {}", + log_pubkey!(node_id), + log_bytes!(msg.channel_id)); + self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); + }, + MessageSendEvent::SendTxAckRbf { ref node_id, ref msg } => { + log_debug!(self.logger, "Handling SendTxAckRbf event in peer_handler for node {} for channel {}", + log_pubkey!(node_id), + log_bytes!(msg.channel_id)); + self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); + }, + MessageSendEvent::SendTxAbort { ref node_id, ref msg } => { + log_debug!(self.logger, "Handling SendTxAbort event in peer_handler for node {} for channel {}", + log_pubkey!(node_id), + log_bytes!(msg.channel_id)); + 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(&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 {}", + log_pubkey!(node_id), + update_add_htlcs.len(), + update_fulfill_htlcs.len(), + update_fail_htlcs.len(), + log_bytes!(commitment_signed.channel_id)); + let mut peer = get_peer_for_forwarding!(node_id); + for msg in update_add_htlcs { + self.enqueue_message(&mut *peer, msg); + } + for msg in update_fulfill_htlcs { + self.enqueue_message(&mut *peer, msg); + } + for msg in update_fail_htlcs { + self.enqueue_message(&mut *peer, msg); + } + for msg in update_fail_malformed_htlcs { + self.enqueue_message(&mut *peer, msg); + } + if let &Some(ref msg) = update_fee { + self.enqueue_message(&mut *peer, msg); + } + 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(&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(&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(&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(&mut *get_peer_for_forwarding!(node_id), msg); + }, + MessageSendEvent::SendChannelAnnouncement { ref node_id, ref msg, ref update_msg } => { + log_debug!(self.logger, "Handling SendChannelAnnouncement event in peer_handler for node {} for short channel id {}", + log_pubkey!(node_id), + msg.contents.short_channel_id); + self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); + self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), update_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); + match self.message_handler.route_handler.handle_channel_announcement(&msg) { + Ok(_) | Err(LightningError { action: msgs::ErrorAction::IgnoreDuplicateGossip, .. }) => + self.forward_broadcast_msg(peers, &wire::Message::ChannelAnnouncement(msg), None), + _ => {}, + } + if let Some(msg) = update_msg { + match self.message_handler.route_handler.handle_channel_update(&msg) { + Ok(_) | Err(LightningError { action: msgs::ErrorAction::IgnoreDuplicateGossip, .. }) => + self.forward_broadcast_msg(peers, &wire::Message::ChannelUpdate(msg), None), + _ => {}, + } + } + }, + MessageSendEvent::BroadcastChannelUpdate { msg } => { + log_debug!(self.logger, "Handling BroadcastChannelUpdate event in peer_handler for short channel id {}", msg.contents.short_channel_id); match self.message_handler.route_handler.handle_channel_update(&msg) { Ok(_) | Err(LightningError { action: msgs::ErrorAction::IgnoreDuplicateGossip, .. }) => self.forward_broadcast_msg(peers, &wire::Message::ChannelUpdate(msg), None), _ => {}, } + }, + MessageSendEvent::BroadcastNodeAnnouncement { msg } => { + log_debug!(self.logger, "Handling BroadcastNodeAnnouncement event in peer_handler for node {}", msg.contents.node_id); + match self.message_handler.route_handler.handle_node_announcement(&msg) { + Ok(_) | Err(LightningError { action: msgs::ErrorAction::IgnoreDuplicateGossip, .. }) => + self.forward_broadcast_msg(peers, &wire::Message::NodeAnnouncement(msg), None), + _ => {}, + } + }, + 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); + self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); + }, + MessageSendEvent::HandleError { node_id, action } => { + match action { + msgs::ErrorAction::DisconnectPeer { msg } => { + if let Some(msg) = msg.as_ref() { + log_trace!(self.logger, "Handling DisconnectPeer HandleError event in peer_handler for node {} with message {}", + log_pubkey!(node_id), msg.data); + } else { + log_trace!(self.logger, "Handling DisconnectPeer HandleError event in peer_handler for node {}", + log_pubkey!(node_id)); + } + // 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. + let msg = msg.map(|msg| wire::Message::<<::Target as wire::CustomMessageReader>::CustomMessage>::Error(msg)); + peers_to_disconnect.insert(node_id, msg); + }, + msgs::ErrorAction::DisconnectPeerWithWarning { msg } => { + log_trace!(self.logger, "Handling DisconnectPeer HandleError event in peer_handler for node {} with message {}", + log_pubkey!(node_id), msg.data); + // 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, Some(wire::Message::Warning(msg))); + }, + msgs::ErrorAction::IgnoreAndLog(level) => { + log_given_level!(self.logger, level, "Received a HandleError event to be ignored for node {}", log_pubkey!(node_id)); + }, + msgs::ErrorAction::IgnoreDuplicateGossip => {}, + msgs::ErrorAction::IgnoreError => { + log_debug!(self.logger, "Received a HandleError event to be ignored for node {}", log_pubkey!(node_id)); + }, + msgs::ErrorAction::SendErrorMessage { ref msg } => { + log_trace!(self.logger, "Handling SendErrorMessage HandleError event in peer_handler for node {} with message {}", + log_pubkey!(node_id), + msg.data); + 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(&mut *get_peer_for_forwarding!(&node_id), msg); + }, + } + }, + MessageSendEvent::SendChannelRangeQuery { ref node_id, ref msg } => { + self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); + }, + MessageSendEvent::SendShortIdsQuery { ref node_id, ref msg } => { + self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); } - }, - MessageSendEvent::BroadcastChannelUpdate { msg } => { - log_debug!(self.logger, "Handling BroadcastChannelUpdate event in peer_handler for short channel id {}", msg.contents.short_channel_id); - match self.message_handler.route_handler.handle_channel_update(&msg) { - Ok(_) | Err(LightningError { action: msgs::ErrorAction::IgnoreDuplicateGossip, .. }) => - self.forward_broadcast_msg(peers, &wire::Message::ChannelUpdate(msg), None), - _ => {}, - } - }, - MessageSendEvent::BroadcastNodeAnnouncement { msg } => { - log_debug!(self.logger, "Handling BroadcastNodeAnnouncement event in peer_handler for node {}", msg.contents.node_id); - match self.message_handler.route_handler.handle_node_announcement(&msg) { - Ok(_) | Err(LightningError { action: msgs::ErrorAction::IgnoreDuplicateGossip, .. }) => - self.forward_broadcast_msg(peers, &wire::Message::NodeAnnouncement(msg), None), - _ => {}, + 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={}", + log_pubkey!(node_id), + msg.short_channel_ids.len(), + msg.first_blocknum, + msg.number_of_blocks, + msg.sync_complete); + self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); } - }, - 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); - 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 } => { - // 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)); - }, - msgs::ErrorAction::IgnoreDuplicateGossip => {}, - msgs::ErrorAction::IgnoreError => { - log_debug!(self.logger, "Received a HandleError event to be ignored for node {}", log_pubkey!(node_id)); - }, - msgs::ErrorAction::SendErrorMessage { ref msg } => { - log_trace!(self.logger, "Handling SendErrorMessage HandleError event in peer_handler for node {} with message {}", - log_pubkey!(node_id), - msg.data); - 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(&mut *get_peer_for_forwarding!(node_id), msg); - }, + MessageSendEvent::SendGossipTimestampFilter { ref node_id, ref msg } => { + self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); } - }, - MessageSendEvent::SendChannelRangeQuery { ref node_id, ref msg } => { - self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); - }, - MessageSendEvent::SendShortIdsQuery { ref node_id, ref 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={}", - log_pubkey!(node_id), - msg.short_channel_ids.len(), - msg.first_blocknum, - msg.number_of_blocks, - msg.sync_complete); - self.enqueue_message(&mut *get_peer_for_forwarding!(node_id), msg); - } - MessageSendEvent::SendGossipTimestampFilter { ref node_id, ref 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() { - if peers_to_disconnect.get(&node_id).is_some() { continue; } - self.enqueue_message(&mut *get_peer_for_forwarding!(&node_id), &msg); - } + for (node_id, msg) in self.message_handler.custom_message_handler.get_and_clear_pending_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_mutex) in peers.iter() { - let mut peer = peer_mutex.lock().unwrap(); - if flush_read_disabled { peer.received_channel_announce_since_backlogged = false; } - self.do_attempt_write_data(&mut (*descriptor).clone(), &mut *peer, flush_read_disabled); + for (descriptor, peer_mutex) in peers.iter() { + let mut peer = peer_mutex.lock().unwrap(); + if flush_read_disabled { peer.received_channel_announce_since_backlogged = false; } + self.do_attempt_write_data(&mut (*descriptor).clone(), &mut *peer, flush_read_disabled); + } } - } - 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). - - let descriptor_opt = self.node_id_to_descriptor.lock().unwrap().remove(&node_id); - if let Some(mut descriptor) = descriptor_opt { - if let Some(peer_mutex) = peers.remove(&descriptor) { - let mut peer = peer_mutex.lock().unwrap(); - 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); - 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, false); - } - self.do_disconnect(descriptor, &*peer, "DisconnectPeer HandleError"); - } else { debug_assert!(false, "Missing connection for peer"); } + 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). + + let descriptor_opt = self.node_id_to_descriptor.lock().unwrap().remove(&node_id); + if let Some(mut descriptor) = descriptor_opt { + if let Some(peer_mutex) = peers.remove(&descriptor) { + let mut peer = peer_mutex.lock().unwrap(); + if let Some(msg) = msg { + 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, false); + } + self.do_disconnect(descriptor, &*peer, "DisconnectPeer HandleError"); + } else { debug_assert!(false, "Missing connection for peer"); } + } } } + + if self.event_processing_state.fetch_sub(1, Ordering::AcqRel) != 1 { + // If another thread incremented the state while we were running we should go + // around again, but only once. + self.event_processing_state.store(1, Ordering::Release); + continue; + } + break; } } @@ -2103,7 +2386,7 @@ impl bool { #[cfg(test)] mod tests { - use crate::chain::keysinterface::{NodeSigner, Recipient}; + use crate::sign::{NodeSigner, Recipient}; + use crate::events; + use crate::io; + use crate::ln::features::{InitFeatures, NodeFeatures}; use crate::ln::peer_channel_encryptor::PeerChannelEncryptor; - use crate::ln::peer_handler::{PeerManager, MessageHandler, SocketDescriptor, IgnoringMessageHandler, filter_addresses}; + use crate::ln::peer_handler::{CustomMessageHandler, PeerManager, MessageHandler, SocketDescriptor, IgnoringMessageHandler, filter_addresses}; use crate::ln::{msgs, wire}; - use crate::ln::msgs::NetAddress; - use crate::util::events; + use crate::ln::msgs::{LightningError, NetAddress}; use crate::util::test_utils; - use bitcoin::secp256k1::SecretKey; + use bitcoin::Network; + use bitcoin::blockdata::constants::ChainHash; + use bitcoin::secp256k1::{PublicKey, SecretKey}; use crate::prelude::*; use crate::sync::{Arc, Mutex}; + use core::convert::Infallible; use core::sync::atomic::{AtomicBool, Ordering}; #[derive(Clone)] @@ -2237,19 +2528,51 @@ mod tests { struct PeerManagerCfg { chan_handler: test_utils::TestChannelMessageHandler, routing_handler: test_utils::TestRoutingMessageHandler, + custom_handler: TestCustomMessageHandler, logger: test_utils::TestLogger, node_signer: test_utils::TestNodeSigner, } + struct TestCustomMessageHandler { + features: InitFeatures, + } + + impl wire::CustomMessageReader for TestCustomMessageHandler { + type CustomMessage = Infallible; + fn read(&self, _: u16, _: &mut R) -> Result, msgs::DecodeError> { + Ok(None) + } + } + + impl CustomMessageHandler for TestCustomMessageHandler { + fn handle_custom_message(&self, _: Infallible, _: &PublicKey) -> Result<(), LightningError> { + unreachable!(); + } + + fn get_and_clear_pending_msg(&self) -> Vec<(PublicKey, Self::CustomMessage)> { Vec::new() } + + fn provided_node_features(&self) -> NodeFeatures { NodeFeatures::empty() } + + fn provided_init_features(&self, _: &PublicKey) -> InitFeatures { + self.features.clone() + } + } + fn create_peermgr_cfgs(peer_count: usize) -> Vec { let mut cfgs = Vec::new(); for i in 0..peer_count { let node_secret = SecretKey::from_slice(&[42 + i as u8; 32]).unwrap(); + let features = { + let mut feature_bits = vec![0u8; 33]; + feature_bits[32] = 0b00000001; + InitFeatures::from_le_bytes(feature_bits) + }; cfgs.push( PeerManagerCfg{ - chan_handler: test_utils::TestChannelMessageHandler::new(), + chan_handler: test_utils::TestChannelMessageHandler::new(ChainHash::using_genesis_block(Network::Testnet)), logger: test_utils::TestLogger::new(), routing_handler: test_utils::TestRoutingMessageHandler::new(), + custom_handler: TestCustomMessageHandler { features }, node_signer: test_utils::TestNodeSigner::new(node_secret), } ); @@ -2258,19 +2581,65 @@ mod tests { cfgs } - fn create_network<'a>(peer_count: usize, cfgs: &'a Vec) -> Vec> { + fn create_feature_incompatible_peermgr_cfgs(peer_count: usize) -> Vec { + let mut cfgs = Vec::new(); + for i in 0..peer_count { + let node_secret = SecretKey::from_slice(&[42 + i as u8; 32]).unwrap(); + let features = { + let mut feature_bits = vec![0u8; 33 + i + 1]; + feature_bits[33 + i] = 0b00000001; + InitFeatures::from_le_bytes(feature_bits) + }; + cfgs.push( + PeerManagerCfg{ + chan_handler: test_utils::TestChannelMessageHandler::new(ChainHash::using_genesis_block(Network::Testnet)), + logger: test_utils::TestLogger::new(), + routing_handler: test_utils::TestRoutingMessageHandler::new(), + custom_handler: TestCustomMessageHandler { features }, + node_signer: test_utils::TestNodeSigner::new(node_secret), + } + ); + } + + cfgs + } + + fn create_chain_incompatible_peermgr_cfgs(peer_count: usize) -> Vec { + let mut cfgs = Vec::new(); + for i in 0..peer_count { + let node_secret = SecretKey::from_slice(&[42 + i as u8; 32]).unwrap(); + let features = InitFeatures::from_le_bytes(vec![0u8; 33]); + let network = ChainHash::from(&[i as u8; 32][..]); + cfgs.push( + PeerManagerCfg{ + chan_handler: test_utils::TestChannelMessageHandler::new(network), + logger: test_utils::TestLogger::new(), + routing_handler: test_utils::TestRoutingMessageHandler::new(), + custom_handler: TestCustomMessageHandler { features }, + node_signer: test_utils::TestNodeSigner::new(node_secret), + } + ); + } + + cfgs + } + + fn create_network<'a>(peer_count: usize, cfgs: &'a Vec) -> Vec> { let mut peers = Vec::new(); for i in 0..peer_count { let ephemeral_bytes = [i as u8; 32]; - let msg_handler = MessageHandler { chan_handler: &cfgs[i].chan_handler, route_handler: &cfgs[i].routing_handler, onion_message_handler: IgnoringMessageHandler {} }; - let peer = PeerManager::new(msg_handler, 0, &ephemeral_bytes, &cfgs[i].logger, IgnoringMessageHandler {}, &cfgs[i].node_signer); + let msg_handler = MessageHandler { + chan_handler: &cfgs[i].chan_handler, route_handler: &cfgs[i].routing_handler, + onion_message_handler: IgnoringMessageHandler {}, custom_message_handler: &cfgs[i].custom_handler + }; + let peer = PeerManager::new(msg_handler, 0, &ephemeral_bytes, &cfgs[i].logger, &cfgs[i].node_signer); peers.push(peer); } peers } - fn establish_connection<'a>(peer_a: &PeerManager, peer_b: &PeerManager) -> (FileDescriptor, FileDescriptor) { + fn establish_connection<'a>(peer_a: &PeerManager, peer_b: &PeerManager) -> (FileDescriptor, FileDescriptor) { let id_a = peer_a.node_signer.get_node_id(Recipient::Node).unwrap(); let mut fd_a = FileDescriptor { fd: 1, outbound_data: Arc::new(Mutex::new(Vec::new())), @@ -2349,7 +2718,7 @@ mod tests { if peers[0].read_event(&mut fd_a, &b_data).is_err() { break; } cfgs[0].chan_handler.pending_events.lock().unwrap() - .push(crate::util::events::MessageSendEvent::SendShutdown { + .push(crate::events::MessageSendEvent::SendShutdown { node_id: peers[1].node_signer.get_node_id(Recipient::Node).unwrap(), msg: msgs::Shutdown { channel_id: [0; 32], @@ -2357,7 +2726,7 @@ mod tests { }, }); cfgs[1].chan_handler.pending_events.lock().unwrap() - .push(crate::util::events::MessageSendEvent::SendShutdown { + .push(crate::events::MessageSendEvent::SendShutdown { node_id: peers[0].node_signer.get_node_id(Recipient::Node).unwrap(), msg: msgs::Shutdown { channel_id: [0; 32], @@ -2385,6 +2754,78 @@ mod tests { thrd_b.join().unwrap(); } + #[test] + fn test_feature_incompatible_peers() { + let cfgs = create_peermgr_cfgs(2); + let incompatible_cfgs = create_feature_incompatible_peermgr_cfgs(2); + + let peers = create_network(2, &cfgs); + let incompatible_peers = create_network(2, &incompatible_cfgs); + let peer_pairs = [(&peers[0], &incompatible_peers[0]), (&incompatible_peers[1], &peers[1])]; + for (peer_a, peer_b) in peer_pairs.iter() { + let id_a = peer_a.node_signer.get_node_id(Recipient::Node).unwrap(); + let mut fd_a = FileDescriptor { + fd: 1, outbound_data: Arc::new(Mutex::new(Vec::new())), + disconnect: Arc::new(AtomicBool::new(false)), + }; + let addr_a = NetAddress::IPv4{addr: [127, 0, 0, 1], port: 1000}; + let mut fd_b = FileDescriptor { + fd: 1, outbound_data: Arc::new(Mutex::new(Vec::new())), + disconnect: Arc::new(AtomicBool::new(false)), + }; + let addr_b = NetAddress::IPv4{addr: [127, 0, 0, 1], port: 1001}; + let initial_data = peer_b.new_outbound_connection(id_a, fd_b.clone(), Some(addr_a.clone())).unwrap(); + peer_a.new_inbound_connection(fd_a.clone(), Some(addr_b.clone())).unwrap(); + assert_eq!(peer_a.read_event(&mut fd_a, &initial_data).unwrap(), false); + peer_a.process_events(); + + let a_data = fd_a.outbound_data.lock().unwrap().split_off(0); + assert_eq!(peer_b.read_event(&mut fd_b, &a_data).unwrap(), false); + + peer_b.process_events(); + let b_data = fd_b.outbound_data.lock().unwrap().split_off(0); + + // Should fail because of unknown required features + assert!(peer_a.read_event(&mut fd_a, &b_data).is_err()); + } + } + + #[test] + fn test_chain_incompatible_peers() { + let cfgs = create_peermgr_cfgs(2); + let incompatible_cfgs = create_chain_incompatible_peermgr_cfgs(2); + + let peers = create_network(2, &cfgs); + let incompatible_peers = create_network(2, &incompatible_cfgs); + let peer_pairs = [(&peers[0], &incompatible_peers[0]), (&incompatible_peers[1], &peers[1])]; + for (peer_a, peer_b) in peer_pairs.iter() { + let id_a = peer_a.node_signer.get_node_id(Recipient::Node).unwrap(); + let mut fd_a = FileDescriptor { + fd: 1, outbound_data: Arc::new(Mutex::new(Vec::new())), + disconnect: Arc::new(AtomicBool::new(false)), + }; + let addr_a = NetAddress::IPv4{addr: [127, 0, 0, 1], port: 1000}; + let mut fd_b = FileDescriptor { + fd: 1, outbound_data: Arc::new(Mutex::new(Vec::new())), + disconnect: Arc::new(AtomicBool::new(false)), + }; + let addr_b = NetAddress::IPv4{addr: [127, 0, 0, 1], port: 1001}; + let initial_data = peer_b.new_outbound_connection(id_a, fd_b.clone(), Some(addr_a.clone())).unwrap(); + peer_a.new_inbound_connection(fd_a.clone(), Some(addr_b.clone())).unwrap(); + assert_eq!(peer_a.read_event(&mut fd_a, &initial_data).unwrap(), false); + peer_a.process_events(); + + let a_data = fd_a.outbound_data.lock().unwrap().split_off(0); + assert_eq!(peer_b.read_event(&mut fd_b, &a_data).unwrap(), false); + + peer_b.process_events(); + let b_data = fd_b.outbound_data.lock().unwrap().split_off(0); + + // Should fail because of incompatible chains + assert!(peer_a.read_event(&mut fd_a, &b_data).is_err()); + } + } + #[test] fn test_disconnect_peer() { // Simple test which builds a network of PeerManager, connects and brings them to NoiseState::Finished and @@ -2409,8 +2850,8 @@ mod tests { // 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 a_chan_handler = test_utils::TestChannelMessageHandler::new(ChainHash::using_genesis_block(Network::Testnet)); + let b_chan_handler = test_utils::TestChannelMessageHandler::new(ChainHash::using_genesis_block(Network::Testnet)); 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); @@ -2673,4 +3114,53 @@ mod tests { // For (None) assert_eq!(filter_addresses(None), None); } + + #[test] + #[cfg(feature = "std")] + fn test_process_events_multithreaded() { + use std::time::{Duration, Instant}; + // Test that `process_events` getting called on multiple threads doesn't generate too many + // loop iterations. + // Each time `process_events` goes around the loop we call + // `get_and_clear_pending_msg_events`, which we count using the `TestMessageHandler`. + // Because the loop should go around once more after a call which fails to take the + // single-threaded lock, if we write zero to the counter before calling `process_events` we + // should never observe there having been more than 2 loop iterations. + // Further, because the last thread to exit will call `process_events` before returning, we + // should always have at least one count at the end. + let cfg = Arc::new(create_peermgr_cfgs(1)); + // Until we have std::thread::scoped we have to unsafe { turn off the borrow checker }. + let peer = Arc::new(create_network(1, unsafe { &*(&*cfg as *const _) as &'static _ }).pop().unwrap()); + + let exit_flag = Arc::new(AtomicBool::new(false)); + macro_rules! spawn_thread { () => { { + let thread_cfg = Arc::clone(&cfg); + let thread_peer = Arc::clone(&peer); + let thread_exit = Arc::clone(&exit_flag); + std::thread::spawn(move || { + while !thread_exit.load(Ordering::Acquire) { + thread_cfg[0].chan_handler.message_fetch_counter.store(0, Ordering::Release); + thread_peer.process_events(); + std::thread::sleep(Duration::from_micros(1)); + } + }) + } } } + + let thread_a = spawn_thread!(); + let thread_b = spawn_thread!(); + let thread_c = spawn_thread!(); + + let start_time = Instant::now(); + while start_time.elapsed() < Duration::from_millis(100) { + let val = cfg[0].chan_handler.message_fetch_counter.load(Ordering::Acquire); + assert!(val <= 2); + std::thread::yield_now(); // Winblowz seemingly doesn't ever interrupt threads?! + } + + exit_flag.store(true, Ordering::Release); + thread_a.join().unwrap(); + thread_b.join().unwrap(); + thread_c.join().unwrap(); + assert!(cfg[0].chan_handler.message_fetch_counter.load(Ordering::Acquire) >= 1); + } }