use bitcoin::hashes::sha256::HashEngine as Sha256Engine;
use bitcoin::hashes::{HashEngine, Hash};
-/// Handler for BOLT1-compliant messages.
+/// A handler provided to [`PeerManager`] for reading and handling custom messages.
+///
+/// [BOLT 1] specifies a custom message type range for use with experimental or application-specific
+/// messages. `CustomMessageHandler` allows for user-defined handling of such types. See the
+/// [`lightning_custom_message`] crate for tools useful in composing more than one custom handler.
+///
+/// [BOLT 1]: https://github.com/lightning/bolts/blob/master/01-messaging.md
+/// [`lightning_custom_message`]: https://docs.rs/lightning_custom_message/latest/lightning_custom_message
pub trait CustomMessageHandler: wire::CustomMessageReader {
- /// Called with the message type that was received and the buffer to be read.
- /// Can return a `MessageHandlingError` if the message could not be handled.
+ /// Handles the given message sent from `sender_node_id`, possibly producing messages for
+ /// [`CustomMessageHandler::get_and_clear_pending_msg`] to return and thus for [`PeerManager`]
+ /// to send.
fn handle_custom_message(&self, msg: Self::CustomMessage, sender_node_id: &PublicKey) -> Result<(), LightningError>;
- /// Gets the list of pending messages which were generated by the custom message
- /// handler, clearing the list in the process. The first tuple element must
- /// correspond to the intended recipients node ids. If no connection to one of the
- /// specified node does not exist, the message is simply not sent to it.
+ /// Returns the list of pending messages that were generated by the handler, clearing the list
+ /// 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)>;
}
struct Peer {
channel_encryptor: PeerChannelEncryptor,
- their_node_id: Option<PublicKey>,
+ /// We cache a `NodeId` here to avoid serializing peers' keys every time we forward gossip
+ /// messages in `PeerManager`. Use `Peer::set_their_node_id` to modify this field.
+ their_node_id: Option<(PublicKey, NodeId)>,
their_features: Option<InitFeatures>,
their_net_address: Option<NetAddress>,
total_outbound_buffered > OUTBOUND_BUFFER_LIMIT_DROP_GOSSIP ||
self.msgs_sent_since_pong > BUFFER_DRAIN_MSGS_PER_TICK * FORWARD_INIT_SYNC_BUFFER_LIMIT_RATIO
}
+
+ fn set_their_node_id(&mut self, node_id: PublicKey) {
+ self.their_node_id = Some((node_id, NodeId::from_pubkey(&node_id)));
+ }
}
/// SimpleArcPeerManager is useful when you need a PeerManager with a static lifetime, e.g.
/// This works around `format!()` taking a reference to each argument, preventing
/// `if let Some(node_id) = peer.their_node_id { format!(.., node_id) } else { .. }` from compiling
/// due to lifetime errors.
-struct OptionalFromDebugger<'a>(&'a Option<PublicKey>);
+struct OptionalFromDebugger<'a>(&'a Option<(PublicKey, NodeId)>);
impl core::fmt::Display for OptionalFromDebugger<'_> {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> Result<(), core::fmt::Error> {
- if let Some(node_id) = self.0 { write!(f, " from {}", log_pubkey!(node_id)) } else { Ok(()) }
+ if let Some((node_id, _)) = self.0 { write!(f, " from {}", log_pubkey!(node_id)) } else { Ok(()) }
}
}
}
}
- /// Get the list of node ids for peers which have completed the initial handshake.
+ /// Get a list of tuples mapping from node id to network addresses for peers which have
+ /// completed the initial handshake.
+ ///
+ /// For outbound connections, the [`PublicKey`] will be the same as the `their_node_id` parameter
+ /// passed in to [`Self::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
+ /// [`PublicKey`].
///
- /// For outbound connections, this will be the same as the their_node_id parameter passed in to
- /// 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> {
+ /// The returned `Option`s will only be `Some` if an address had been previously given via
+ /// [`Self::new_outbound_connection`] or [`Self::new_inbound_connection`].
+ pub fn get_peer_node_ids(&self) -> Vec<(PublicKey, Option<NetAddress>)> {
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() {
+ if !p.channel_encryptor.is_ready_for_encryption() || p.their_features.is_none() ||
+ p.their_node_id.is_none() {
return None;
}
- p.their_node_id
+ Some((p.their_node_id.unwrap().0, p.their_net_address.clone()))
}).collect()
}
SecretKey::from_slice(&Sha256::from_engine(ephemeral_hash).into_inner()).expect("You broke SHA-256!")
}
- /// Indicates a new outbound connection has been established to a node with the given node_id
+ /// Indicates a new outbound connection has been established to a node with the given `node_id`
/// and an optional remote network address.
///
/// The remote network address adds the option to report a remote IP address back to a connecting
let mut have_written = false;
while !peer.awaiting_write_event {
if peer.should_buffer_onion_message() {
- if let Some(peer_node_id) = peer.their_node_id {
+ if let Some((peer_node_id, _)) = peer.their_node_id {
if let Some(next_onion_message) =
self.message_handler.onion_message_handler.next_onion_message_for_peer(peer_node_id) {
self.enqueue_message(peer, &next_onion_message);
/// Append a message to a peer's pending outbound/write buffer
fn enqueue_message<M: wire::Type>(&self, peer: &mut Peer, message: &M) {
if is_gossip_msg(message.type_id()) {
- log_gossip!(self.logger, "Enqueueing message {:?} to {}", message, log_pubkey!(peer.their_node_id.unwrap()));
+ log_gossip!(self.logger, "Enqueueing message {:?} to {}", message, log_pubkey!(peer.their_node_id.unwrap().0));
} else {
- log_trace!(self.logger, "Enqueueing message {:?} to {}", message, log_pubkey!(peer.their_node_id.unwrap()))
+ log_trace!(self.logger, "Enqueueing message {:?} to {}", message, log_pubkey!(peer.their_node_id.unwrap().0))
}
peer.msgs_sent_since_pong += 1;
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(message));
macro_rules! insert_node_id {
() => {
- match self.node_id_to_descriptor.lock().unwrap().entry(peer.their_node_id.unwrap()) {
+ match self.node_id_to_descriptor.lock().unwrap().entry(peer.their_node_id.unwrap().0) {
hash_map::Entry::Occupied(_) => {
- log_trace!(self.logger, "Got second connection with {}, closing", log_pubkey!(peer.their_node_id.unwrap()));
+ log_trace!(self.logger, "Got second connection with {}, closing", log_pubkey!(peer.their_node_id.unwrap().0));
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()));
+ log_debug!(self.logger, "Finished noise handshake for connection with {}", log_pubkey!(peer.their_node_id.unwrap().0));
entry.insert(peer_descriptor.clone())
},
};
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);
+ peer.set_their_node_id(their_node_id);
insert_node_id!();
let features = self.message_handler.chan_handler.provided_init_features(&their_node_id)
.or(self.message_handler.route_handler.provided_init_features(&their_node_id))
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);
+ peer.set_their_node_id(their_node_id);
insert_node_id!();
let features = self.message_handler.chan_handler.provided_init_features(&their_node_id)
.or(self.message_handler.route_handler.provided_init_features(&their_node_id))
}
for msg in msgs_to_forward.drain(..) {
- self.forward_broadcast_msg(&*peers, &msg, peer_node_id.as_ref());
+ self.forward_broadcast_msg(&*peers, &msg, peer_node_id.as_ref().map(|(pk, _)| pk));
}
Ok(pause_read)
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> {
- let their_node_id = peer_lock.their_node_id.clone().expect("We know the peer's public key by the time we receive messages");
+ let their_node_id = peer_lock.their_node_id.clone().expect("We know the peer's public key by the time we receive messages").0;
peer_lock.received_message_since_timer_tick = true;
// Need an Init as first message
log_gossip!(self.logger, "Skipping broadcast message to {:?} as its outbound buffer is full", peer.their_node_id);
continue;
}
- if let Some(their_node_id) = peer.their_node_id {
- let their_node_id = NodeId::from_pubkey(&their_node_id);
+ if let Some((_, their_node_id)) = peer.their_node_id {
if their_node_id == msg.contents.node_id_1 || their_node_id == msg.contents.node_id_2 {
continue;
}
}
- if except_node.is_some() && peer.their_node_id.as_ref() == except_node {
+ if except_node.is_some() && peer.their_node_id.as_ref().map(|(pk, _)| pk) == except_node {
continue;
}
self.enqueue_encoded_gossip_broadcast(&mut *peer, encoded_msg.clone());
log_gossip!(self.logger, "Skipping broadcast message to {:?} as its outbound buffer is full", peer.their_node_id);
continue;
}
- if let Some(their_node_id) = peer.their_node_id {
- if NodeId::from_pubkey(&their_node_id) == msg.contents.node_id {
+ if let Some((_, their_node_id)) = peer.their_node_id {
+ if their_node_id == msg.contents.node_id {
continue;
}
}
- if except_node.is_some() && peer.their_node_id.as_ref() == except_node {
+ if except_node.is_some() && peer.their_node_id.as_ref().map(|(pk, _)| pk) == except_node {
continue;
}
self.enqueue_encoded_gossip_broadcast(&mut *peer, encoded_msg.clone());
log_gossip!(self.logger, "Skipping broadcast message to {:?} as its outbound buffer is full", peer.their_node_id);
continue;
}
- if except_node.is_some() && peer.their_node_id.as_ref() == except_node {
+ if except_node.is_some() && peer.their_node_id.as_ref().map(|(pk, _)| pk) == except_node {
continue;
}
self.enqueue_encoded_gossip_broadcast(&mut *peer, encoded_msg.clone());
},
Some(peer_lock) => {
let peer = peer_lock.lock().unwrap();
- if let Some(node_id) = peer.their_node_id {
+ 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().clear();
let peers = &mut *peers_lock;
for (mut descriptor, peer) in peers.drain() {
- if let Some(node_id) = peer.lock().unwrap().their_node_id {
+ 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);
self.message_handler.chan_handler.peer_disconnected(&node_id, false);
self.message_handler.onion_message_handler.peer_disconnected(&node_id, false);
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 {
+ 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);
}
fn establish_connection<'a>(peer_a: &PeerManager<FileDescriptor, &'a test_utils::TestChannelMessageHandler, &'a test_utils::TestRoutingMessageHandler, IgnoringMessageHandler, &'a test_utils::TestLogger, IgnoringMessageHandler, &'a test_utils::TestNodeSigner>, peer_b: &PeerManager<FileDescriptor, &'a test_utils::TestChannelMessageHandler, &'a test_utils::TestRoutingMessageHandler, IgnoringMessageHandler, &'a test_utils::TestLogger, IgnoringMessageHandler, &'a test_utils::TestNodeSigner>) -> (FileDescriptor, FileDescriptor) {
- let a_id = peer_a.node_signer.get_node_id(Recipient::Node).unwrap();
+ 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())) };
+ let addr_a = NetAddress::IPv4{addr: [127, 0, 0, 1], port: 1000};
+ let id_b = peer_b.node_signer.get_node_id(Recipient::Node).unwrap();
let mut fd_b = FileDescriptor { fd: 1, outbound_data: Arc::new(Mutex::new(Vec::new())) };
- let initial_data = peer_b.new_outbound_connection(a_id, fd_b.clone(), None).unwrap();
- peer_a.new_inbound_connection(fd_a.clone(), None).unwrap();
+ 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);
+ assert!(peer_a.get_peer_node_ids().contains(&(id_b, Some(addr_b))));
+ assert!(peer_b.get_peer_node_ids().contains(&(id_a, Some(addr_a))));
+
(fd_a.clone(), fd_b.clone())
}
projects / rust-lightning / blobdiff