X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;ds=sidebyside;f=lightning%2Fsrc%2Fonion_message%2Fmessenger.rs;h=8d4fb044f5af14a7c15b1657f4f4344b7a8756b4;hb=d46519bbd0edb76a2d6dd8d33dac057d49576a46;hp=eb309b622e817766fa53a3707287c1f0ec85b33d;hpb=1114c3c5aaca7a0292a6416975ab94c17fe07cfb;p=rust-lightning diff --git a/lightning/src/onion_message/messenger.rs b/lightning/src/onion_message/messenger.rs index eb309b62..8d4fb044 100644 --- a/lightning/src/onion_message/messenger.rs +++ b/lightning/src/onion_message/messenger.rs @@ -18,6 +18,7 @@ use bitcoin::secp256k1::{self, PublicKey, Scalar, Secp256k1, SecretKey}; use crate::blinded_path::BlindedPath; use crate::blinded_path::message::{advance_path_by_one, ForwardTlvs, ReceiveTlvs}; use crate::blinded_path::utils; +use crate::events::{Event, EventHandler, EventsProvider}; use crate::sign::{EntropySource, KeysManager, NodeSigner, Recipient}; #[cfg(not(c_bindings))] use crate::ln::channelmanager::{SimpleArcChannelManager, SimpleRefChannelManager}; @@ -25,7 +26,7 @@ use crate::ln::features::{InitFeatures, NodeFeatures}; use crate::ln::msgs::{self, OnionMessage, OnionMessageHandler, SocketAddress}; use crate::ln::onion_utils; use crate::ln::peer_handler::IgnoringMessageHandler; -use crate::routing::gossip::NetworkGraph; +use crate::routing::gossip::{NetworkGraph, NodeId}; pub use super::packet::OnionMessageContents; use super::packet::ParsedOnionMessageContents; use super::offers::OffersMessageHandler; @@ -39,6 +40,8 @@ use crate::io; use crate::sync::{Arc, Mutex}; use crate::prelude::*; +pub(super) const MAX_TIMER_TICKS: usize = 2; + /// A sender, receiver and forwarder of [`OnionMessage`]s. /// /// # Handling Messages @@ -148,7 +151,7 @@ where L::Target: Logger, MR::Target: MessageRouter, OMH::Target: OffersMessageHandler, - CMH:: Target: CustomOnionMessageHandler, + CMH::Target: CustomOnionMessageHandler, { entropy_source: ES, node_signer: NS, @@ -165,22 +168,27 @@ enum OnionMessageBuffer { /// Messages for a node connected as a peer. ConnectedPeer(VecDeque), - /// Messages for a node that is not yet connected. - PendingConnection(VecDeque), + /// Messages for a node that is not yet connected, which are dropped after [`MAX_TIMER_TICKS`] + /// and tracked here. + PendingConnection(VecDeque, Option>, usize), } impl OnionMessageBuffer { + fn pending_connection(addresses: Vec) -> Self { + Self::PendingConnection(VecDeque::new(), Some(addresses), 0) + } + fn pending_messages(&self) -> &VecDeque { match self { OnionMessageBuffer::ConnectedPeer(pending_messages) => pending_messages, - OnionMessageBuffer::PendingConnection(pending_messages) => pending_messages, + OnionMessageBuffer::PendingConnection(pending_messages, _, _) => pending_messages, } } fn enqueue_message(&mut self, message: OnionMessage) { let pending_messages = match self { OnionMessageBuffer::ConnectedPeer(pending_messages) => pending_messages, - OnionMessageBuffer::PendingConnection(pending_messages) => pending_messages, + OnionMessageBuffer::PendingConnection(pending_messages, _, _) => pending_messages, }; pending_messages.push_back(message); @@ -189,7 +197,7 @@ impl OnionMessageBuffer { fn dequeue_message(&mut self) -> Option { let pending_messages = match self { OnionMessageBuffer::ConnectedPeer(pending_messages) => pending_messages, - OnionMessageBuffer::PendingConnection(pending_messages) => { + OnionMessageBuffer::PendingConnection(pending_messages, _, _) => { debug_assert!(false); pending_messages }, @@ -202,14 +210,14 @@ impl OnionMessageBuffer { fn release_pending_messages(&mut self) -> VecDeque { let pending_messages = match self { OnionMessageBuffer::ConnectedPeer(pending_messages) => pending_messages, - OnionMessageBuffer::PendingConnection(pending_messages) => pending_messages, + OnionMessageBuffer::PendingConnection(pending_messages, _, _) => pending_messages, }; core::mem::take(pending_messages) } fn mark_connected(&mut self) { - if let OnionMessageBuffer::PendingConnection(pending_messages) = self { + if let OnionMessageBuffer::PendingConnection(pending_messages, _, _) = self { let mut new_pending_messages = VecDeque::new(); core::mem::swap(pending_messages, &mut new_pending_messages); *self = OnionMessageBuffer::ConnectedPeer(new_pending_messages); @@ -282,10 +290,24 @@ where fn find_path( &self, _sender: PublicKey, peers: Vec, destination: Destination ) -> Result { - if peers.contains(&destination.first_node()) { + let first_node = destination.first_node(); + if peers.contains(&first_node) { Ok(OnionMessagePath { intermediate_nodes: vec![], destination, addresses: None }) } else { - Err(()) + let network_graph = self.network_graph.deref().read_only(); + let node_announcement = network_graph + .node(&NodeId::from_pubkey(&first_node)) + .and_then(|node_info| node_info.announcement_info.as_ref()) + .and_then(|announcement_info| announcement_info.announcement_message.as_ref()) + .map(|node_announcement| &node_announcement.contents); + + match node_announcement { + Some(node_announcement) if node_announcement.features.supports_onion_messages() => { + let addresses = Some(node_announcement.addresses.clone()); + Ok(OnionMessagePath { intermediate_nodes: vec![], destination, addresses }) + }, + _ => Err(()), + } } } } @@ -367,6 +389,8 @@ pub enum SendError { /// The provided [`Destination`] was an invalid [`BlindedPath`] due to not having any blinded /// hops. TooFewBlindedHops, + /// The first hop is not a peer and doesn't have a known [`SocketAddress`]. + InvalidFirstHop(PublicKey), /// A path from the sender to the destination could not be found by the [`MessageRouter`]. PathNotFound, /// Onion message contents must have a TLV type >= 64. @@ -439,12 +463,12 @@ pub enum PeeledOnion { pub fn create_onion_message( entropy_source: &ES, node_signer: &NS, secp_ctx: &Secp256k1, path: OnionMessagePath, contents: T, reply_path: Option, -) -> Result<(PublicKey, OnionMessage), SendError> +) -> Result<(PublicKey, OnionMessage, Option>), SendError> where ES::Target: EntropySource, NS::Target: NodeSigner, { - let OnionMessagePath { intermediate_nodes, mut destination, .. } = path; + let OnionMessagePath { intermediate_nodes, mut destination, addresses } = path; if let Destination::BlindedPath(BlindedPath { ref blinded_hops, .. }) = destination { if blinded_hops.is_empty() { return Err(SendError::TooFewBlindedHops); @@ -485,10 +509,8 @@ where let onion_routing_packet = construct_onion_message_packet( packet_payloads, packet_keys, prng_seed).map_err(|()| SendError::TooBigPacket)?; - Ok((first_node_id, OnionMessage { - blinding_point, - onion_routing_packet - })) + let message = OnionMessage { blinding_point, onion_routing_packet }; + Ok((first_node_id, message, addresses)) } /// Decode one layer of an incoming [`OnionMessage`]. @@ -682,7 +704,7 @@ where ) -> Result { log_trace!(self.logger, "Constructing onion message {}: {:?}", log_suffix, contents); - let (first_node_id, onion_message) = create_onion_message( + let (first_node_id, onion_message, addresses) = create_onion_message( &self.entropy_source, &self.node_signer, &self.secp_ctx, path, contents, reply_path )?; @@ -692,10 +714,13 @@ where } match message_buffers.entry(first_node_id) { - hash_map::Entry::Vacant(e) => { - e.insert(OnionMessageBuffer::PendingConnection(VecDeque::new())) - .enqueue_message(onion_message); - Ok(SendSuccess::BufferedAwaitingConnection(first_node_id)) + hash_map::Entry::Vacant(e) => match addresses { + None => Err(SendError::InvalidFirstHop(first_node_id)), + Some(addresses) => { + e.insert(OnionMessageBuffer::pending_connection(addresses)) + .enqueue_message(onion_message); + Ok(SendSuccess::BufferedAwaitingConnection(first_node_id)) + }, }, hash_map::Entry::Occupied(mut e) => { e.get_mut().enqueue_message(onion_message); @@ -764,6 +789,27 @@ fn outbound_buffer_full(peer_node_id: &PublicKey, buffer: &HashMap EventsProvider +for OnionMessenger +where + ES::Target: EntropySource, + NS::Target: NodeSigner, + L::Target: Logger, + MR::Target: MessageRouter, + OMH::Target: OffersMessageHandler, + CMH::Target: CustomOnionMessageHandler, +{ + fn process_pending_events(&self, handler: H) where H::Target: EventHandler { + for (node_id, recipient) in self.message_buffers.lock().unwrap().iter_mut() { + if let OnionMessageBuffer::PendingConnection(_, addresses, _) = recipient { + if let Some(addresses) = addresses.take() { + handler.handle_event(Event::ConnectionNeeded { node_id: *node_id, addresses }); + } + } + } + } +} + impl OnionMessageHandler for OnionMessenger where @@ -856,6 +902,26 @@ where } } + fn timer_tick_occurred(&self) { + let mut message_buffers = self.message_buffers.lock().unwrap(); + + // Drop any pending recipients since the last call to avoid retaining buffered messages for + // too long. + message_buffers.retain(|_, recipient| match recipient { + OnionMessageBuffer::PendingConnection(_, None, ticks) => *ticks < MAX_TIMER_TICKS, + OnionMessageBuffer::PendingConnection(_, Some(_), _) => true, + _ => true, + }); + + // Increment a timer tick for pending recipients so that their buffered messages are dropped + // at MAX_TIMER_TICKS. + for recipient in message_buffers.values_mut() { + if let OnionMessageBuffer::PendingConnection(_, None, ticks) = recipient { + *ticks += 1; + } + } + } + fn provided_node_features(&self) -> NodeFeatures { let mut features = NodeFeatures::empty(); features.set_onion_messages_optional();