Merge pull request #1106 from TheBlueMatt/2021-10-no-perm-err-broadcast
[rust-lightning] / lightning / src / ln / peer_handler.rs
index 9b7490c3049be76d8fe21bad0b6c4ad47ab87599..d38afcbacb304620851d92de9eb54f4de813e5c0 100644 (file)
@@ -25,6 +25,7 @@ use util::ser::{VecWriter, Writeable, Writer};
 use ln::peer_channel_encryptor::{PeerChannelEncryptor,NextNoiseStep};
 use ln::wire;
 use ln::wire::Encode;
+use onion_message::{SimpleArcOnionMessenger, SimpleRefOnionMessenger};
 use routing::gossip::{NetworkGraph, P2PGossipSync};
 use util::atomic_counter::AtomicCounter;
 use util::crypto::sign;
@@ -72,7 +73,7 @@ impl RoutingMessageHandler for IgnoringMessageHandler {
        fn get_next_channel_announcement(&self, _starting_point: u64) ->
                Option<(msgs::ChannelAnnouncement, Option<msgs::ChannelUpdate>, Option<msgs::ChannelUpdate>)> { None }
        fn get_next_node_announcement(&self, _starting_point: Option<&PublicKey>) -> Option<msgs::NodeAnnouncement> { None }
-       fn peer_connected(&self, _their_node_id: &PublicKey, _init: &msgs::Init) {}
+       fn peer_connected(&self, _their_node_id: &PublicKey, _init: &msgs::Init) -> Result<(), ()> { Ok(()) }
        fn handle_reply_channel_range(&self, _their_node_id: &PublicKey, _msg: msgs::ReplyChannelRange) -> Result<(), LightningError> { Ok(()) }
        fn handle_reply_short_channel_ids_end(&self, _their_node_id: &PublicKey, _msg: msgs::ReplyShortChannelIdsEnd) -> Result<(), LightningError> { Ok(()) }
        fn handle_query_channel_range(&self, _their_node_id: &PublicKey, _msg: msgs::QueryChannelRange) -> Result<(), LightningError> { Ok(()) }
@@ -87,7 +88,7 @@ impl OnionMessageProvider for IgnoringMessageHandler {
 }
 impl OnionMessageHandler for IgnoringMessageHandler {
        fn handle_onion_message(&self, _their_node_id: &PublicKey, _msg: &msgs::OnionMessage) {}
-       fn peer_connected(&self, _their_node_id: &PublicKey, _init: &msgs::Init) {}
+       fn peer_connected(&self, _their_node_id: &PublicKey, _init: &msgs::Init) -> Result<(), ()> { Ok(()) }
        fn peer_disconnected(&self, _their_node_id: &PublicKey, _no_connection_possible: bool) {}
        fn provided_node_features(&self) -> NodeFeatures { NodeFeatures::empty() }
        fn provided_init_features(&self, _their_node_id: &PublicKey) -> InitFeatures {
@@ -208,13 +209,26 @@ impl ChannelMessageHandler for ErroringMessageHandler {
        // msgs::ChannelUpdate does not contain the channel_id field, so we just drop them.
        fn handle_channel_update(&self, _their_node_id: &PublicKey, _msg: &msgs::ChannelUpdate) {}
        fn peer_disconnected(&self, _their_node_id: &PublicKey, _no_connection_possible: bool) {}
-       fn peer_connected(&self, _their_node_id: &PublicKey, _msg: &msgs::Init) {}
+       fn peer_connected(&self, _their_node_id: &PublicKey, _init: &msgs::Init) -> Result<(), ()> { Ok(()) }
        fn handle_error(&self, _their_node_id: &PublicKey, _msg: &msgs::ErrorMessage) {}
        fn provided_node_features(&self) -> NodeFeatures { NodeFeatures::empty() }
        fn provided_init_features(&self, _their_node_id: &PublicKey) -> InitFeatures {
-               // Use our known channel feature set as peers may otherwise not be willing to talk to us at
-               // all.
-               InitFeatures::known_channel_features()
+               // Set a number of features which various nodes may require to talk to us. It's totally
+               // reasonable to indicate we "support" all kinds of channel features...we just reject all
+               // channels.
+               let mut features = InitFeatures::empty();
+               features.set_data_loss_protect_optional();
+               features.set_upfront_shutdown_script_optional();
+               features.set_variable_length_onion_optional();
+               features.set_static_remote_key_optional();
+               features.set_payment_secret_optional();
+               features.set_basic_mpp_optional();
+               features.set_wumbo_optional();
+               features.set_shutdown_any_segwit_optional();
+               features.set_channel_type_optional();
+               features.set_scid_privacy_optional();
+               features.set_zero_conf_optional();
+               features
        }
 }
 impl Deref for ErroringMessageHandler {
@@ -461,8 +475,8 @@ impl Peer {
 /// SimpleRefPeerManager is the more appropriate type. Defining these type aliases prevents
 /// issues such as overly long function definitions.
 ///
-/// (C-not exported) as Arcs don't make sense in bindings
-pub type SimpleArcPeerManager<SD, M, T, F, C, L> = PeerManager<SD, Arc<SimpleArcChannelManager<M, T, F, L>>, Arc<P2PGossipSync<Arc<NetworkGraph<Arc<L>>>, Arc<C>, Arc<L>>>, IgnoringMessageHandler, Arc<L>, Arc<IgnoringMessageHandler>>;
+/// (C-not exported) as `Arc`s don't make sense in bindings.
+pub type SimpleArcPeerManager<SD, M, T, F, C, L> = PeerManager<SD, Arc<SimpleArcChannelManager<M, T, F, L>>, Arc<P2PGossipSync<Arc<NetworkGraph<Arc<L>>>, Arc<C>, Arc<L>>>, Arc<SimpleArcOnionMessenger<L>>, Arc<L>, IgnoringMessageHandler>;
 
 /// 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
@@ -471,8 +485,8 @@ pub type SimpleArcPeerManager<SD, M, T, F, C, L> = PeerManager<SD, Arc<SimpleArc
 /// But if this is not necessary, using a reference is more efficient. Defining these type aliases
 /// helps with issues such as long function definitions.
 ///
-/// (C-not exported) as Arcs don't make sense in bindings
-pub type SimpleRefPeerManager<'a, 'b, 'c, 'd, 'e, 'f, 'g, 'h, SD, M, T, F, C, L> = PeerManager<SD, SimpleRefChannelManager<'a, 'b, 'c, 'd, 'e, M, T, F, L>, &'e P2PGossipSync<&'g NetworkGraph<&'f L>, &'h C, &'f L>, IgnoringMessageHandler, &'f L, IgnoringMessageHandler>;
+/// (C-not exported) as general type aliases don't make sense in bindings.
+pub type SimpleRefPeerManager<'a, 'b, 'c, 'd, 'e, 'f, 'g, 'h, 'i, 'j, 'k, SD, M, T, F, C, L> = PeerManager<SD, SimpleRefChannelManager<'a, 'b, 'c, 'd, 'e, M, T, F, L>, &'e P2PGossipSync<&'g NetworkGraph<&'f L>, &'h C, &'f L>, &'i SimpleRefOnionMessenger<'j, 'k, L>, &'f L, IgnoringMessageHandler>;
 
 /// A PeerManager manages a set of peers, described by their [`SocketDescriptor`] and marshalls
 /// socket events into messages which it passes on to its [`MessageHandler`].
@@ -824,7 +838,7 @@ impl<Descriptor: SocketDescriptor, CM: Deref, RM: Deref, OM: Deref, L: Deref, CM
                        }
                        if peer.should_buffer_gossip_broadcast() {
                                if let Some(msg) = peer.gossip_broadcast_buffer.pop_front() {
-                                       peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&msg[..]));
+                                       peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_buffer(&msg[..]));
                                }
                        }
                        if peer.should_buffer_gossip_backfill() {
@@ -943,16 +957,13 @@ impl<Descriptor: SocketDescriptor, CM: Deref, RM: Deref, OM: Deref, L: Deref, CM
 
        /// Append a message to a peer's pending outbound/write buffer
        fn enqueue_message<M: wire::Type>(&self, peer: &mut Peer, message: &M) {
-               let mut buffer = VecWriter(Vec::with_capacity(2048));
-               wire::write(message, &mut buffer).unwrap(); // crash if the write failed
-
                if is_gossip_msg(message.type_id()) {
                        log_gossip!(self.logger, "Enqueueing message {:?} to {}", message, log_pubkey!(peer.their_node_id.unwrap()));
                } else {
                        log_trace!(self.logger, "Enqueueing message {:?} to {}", message, log_pubkey!(peer.their_node_id.unwrap()))
                }
                peer.msgs_sent_since_pong += 1;
-               peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&buffer.0[..]));
+               peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(message));
        }
 
        /// Append a message to a peer's pending outbound/write gossip broadcast buffer
@@ -1129,7 +1140,10 @@ impl<Descriptor: SocketDescriptor, CM: Deref, RM: Deref, OM: Deref, L: Deref, CM
                                                                                                }
                                                                                                (_, 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() });
+                                                                                                       self.enqueue_message(peer, &msgs::WarningMessage {
+                                                                                                               channel_id: [0; 32],
+                                                                                                               data: format!("Unreadable/bogus gossip message of type {}", ty),
+                                                                                                       });
                                                                                                        continue;
                                                                                                }
                                                                                                (msgs::DecodeError::UnknownRequiredFeature, ty) => {
@@ -1212,14 +1226,18 @@ impl<Descriptor: SocketDescriptor, CM: Deref, RM: Deref, OM: Deref, L: Deref, CM
                                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));
+                       if let Err(()) = self.message_handler.route_handler.peer_connected(&their_node_id, &msg) {
+                               log_debug!(self.logger, "Route Handler decided we couldn't communicate with peer {}", log_pubkey!(their_node_id));
+                               return Err(PeerHandleError{ no_connection_possible: true }.into());
+                       }
+                       if let Err(()) = self.message_handler.chan_handler.peer_connected(&their_node_id, &msg) {
+                               log_debug!(self.logger, "Channel Handler decided we couldn't communicate with peer {}", log_pubkey!(their_node_id));
+                               return Err(PeerHandleError{ no_connection_possible: true }.into());
+                       }
+                       if let Err(()) = self.message_handler.onion_message_handler.peer_connected(&their_node_id, &msg) {
+                               log_debug!(self.logger, "Onion Message Handler decided we couldn't communicate with peer {}", 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);
-                       self.message_handler.onion_message_handler.peer_connected(&their_node_id, &msg);
 
                        peer_lock.their_features = Some(msg.features);
                        return Ok(None);