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TheBlueMattTheBlueMatt
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Pretty-shitty implement TODOs for msg forwarding
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‎lightning/src/ln/peer_handler.rs

Lines changed: 69 additions & 38 deletions
Original file line numberDiff line numberDiff line change
@@ -151,13 +151,20 @@ impl Peer {
151151
}
152152
}
153153

154+
enum AnnouncementMsg {
155+
ChanUpdate(msgs::ChannelUpdate),
156+
ChanAnnounce(msgs::ChannelAnnouncement),
157+
NodeAnnounce(msgs::NodeAnnouncement),
158+
}
159+
154160
struct PeerHolder<Descriptor: SocketDescriptor> {
155161
peers: HashMap<Descriptor, Peer>,
156162
/// Added to by do_read_event for cases where we pushed a message onto the send buffer but
157163
/// didn't call do_attempt_write_data to avoid reentrancy. Cleared in process_events()
158164
peers_needing_send: HashSet<Descriptor>,
159165
/// Only add to this set when noise completes:
160166
node_id_to_descriptor: HashMap<PublicKey, Descriptor>,
167+
pending_broadcasts: Vec<(PublicKey, AnnouncementMsg)>,
161168
}
162169

163170
#[cfg(not(any(target_pointer_width = "32", target_pointer_width = "64")))]
@@ -226,7 +233,8 @@ impl<Descriptor: SocketDescriptor, CM: Deref, L: Deref> PeerManager<Descriptor,
226233
peers: Mutex::new(PeerHolder {
227234
peers: HashMap::new(),
228235
peers_needing_send: HashSet::new(),
229-
node_id_to_descriptor: HashMap::new()
236+
node_id_to_descriptor: HashMap::new(),
237+
pending_broadcasts: Vec::new(),
230238
}),
231239
our_node_secret,
232240
ephemeral_key_midstate,
@@ -750,21 +758,21 @@ impl<Descriptor: SocketDescriptor, CM: Deref, L: Deref> PeerManager<Descriptor,
750758
let should_forward = try_potential_handleerror!(self.message_handler.route_handler.handle_channel_announcement(&msg));
751759

752760
if should_forward {
753-
// TODO: forward msg along to all our other peers!
761+
peers.pending_broadcasts.push((peer.their_node_id.unwrap().clone(), AnnouncementMsg::ChanAnnounce(msg)));
754762
}
755763
},
756764
wire::Message::NodeAnnouncement(msg) => {
757765
let should_forward = try_potential_handleerror!(self.message_handler.route_handler.handle_node_announcement(&msg));
758766

759767
if should_forward {
760-
// TODO: forward msg along to all our other peers!
768+
peers.pending_broadcasts.push((peer.their_node_id.unwrap().clone(), AnnouncementMsg::NodeAnnounce(msg)));
761769
}
762770
},
763771
wire::Message::ChannelUpdate(msg) => {
764772
let should_forward = try_potential_handleerror!(self.message_handler.route_handler.handle_channel_update(&msg));
765773

766774
if should_forward {
767-
// TODO: forward msg along to all our other peers!
775+
peers.pending_broadcasts.push((peer.their_node_id.unwrap().clone(), AnnouncementMsg::ChanUpdate(msg)));
768776
}
769777
},
770778

@@ -808,6 +816,54 @@ impl<Descriptor: SocketDescriptor, CM: Deref, L: Deref> PeerManager<Descriptor,
808816
let mut events_generated = self.message_handler.chan_handler.get_and_clear_pending_msg_events();
809817
let mut peers_lock = self.peers.lock().unwrap();
810818
let peers = &mut *peers_lock;
819+
820+
macro_rules! broadcast_msgs {
821+
({ $($except_check: stmt), * }, { $($encoded_msg: expr), * }) => { {
822+
for (ref descriptor, ref mut peer) in peers.peers.iter_mut() {
823+
if !peer.channel_encryptor.is_ready_for_encryption() || peer.their_features.is_none() {
824+
continue
825+
}
826+
match peer.their_node_id {
827+
None => continue,
828+
Some(their_node_id) => {
829+
$(
830+
if { $except_check }(&peer, their_node_id) { continue }
831+
)*
832+
}
833+
}
834+
$(peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&$encoded_msg));)*
835+
self.do_attempt_write_data(&mut (*descriptor).clone(), peer);
836+
}
837+
} }
838+
}
839+
840+
for (from_node_id, broadcast) in peers.pending_broadcasts.drain(..) {
841+
match broadcast {
842+
AnnouncementMsg::ChanUpdate(msg) => {
843+
let encoded_msg = encode_msg!(&msg);
844+
broadcast_msgs!({ |peer: & &mut Peer, _| !peer.should_forward_channel_announcement(msg.contents.short_channel_id),
845+
|_, their_node_id| their_node_id == from_node_id },
846+
{ encoded_msg });
847+
},
848+
AnnouncementMsg::ChanAnnounce(msg) => {
849+
let encoded_msg = encode_msg!(&msg);
850+
broadcast_msgs!({ |peer: & &mut Peer, _| !peer.should_forward_channel_announcement(msg.contents.short_channel_id),
851+
|_, their_node_id| their_node_id == msg.contents.node_id_1,
852+
|_, their_node_id| their_node_id == msg.contents.node_id_2,
853+
|_, their_node_id| their_node_id == from_node_id },
854+
{ encoded_msg });
855+
},
856+
AnnouncementMsg::NodeAnnounce(msg) => {
857+
let encoded_msg = encode_msg!(&msg);
858+
859+
broadcast_msgs!({ |peer: & &mut Peer, _| !peer.should_forward_node_announcement(msg.contents.node_id),
860+
|_, their_node_id| their_node_id == msg.contents.node_id,
861+
|_, their_node_id| their_node_id == from_node_id },
862+
{ encoded_msg });
863+
}
864+
}
865+
}
866+
811867
for event in events_generated.drain(..) {
812868
macro_rules! get_peer_for_forwarding {
813869
($node_id: expr, $handle_no_such_peer: block) => {
@@ -970,54 +1026,29 @@ impl<Descriptor: SocketDescriptor, CM: Deref, L: Deref> PeerManager<Descriptor,
9701026
if self.message_handler.route_handler.handle_channel_announcement(msg).is_ok() && self.message_handler.route_handler.handle_channel_update(update_msg).is_ok() {
9711027
let encoded_msg = encode_msg!(msg);
9721028
let encoded_update_msg = encode_msg!(update_msg);
973-
974-
for (ref descriptor, ref mut peer) in peers.peers.iter_mut() {
975-
if !peer.channel_encryptor.is_ready_for_encryption() || peer.their_features.is_none() ||
976-
!peer.should_forward_channel_announcement(msg.contents.short_channel_id) {
977-
continue
978-
}
979-
match peer.their_node_id {
980-
None => continue,
981-
Some(their_node_id) => {
982-
if their_node_id == msg.contents.node_id_1 || their_node_id == msg.contents.node_id_2 {
983-
continue
984-
}
985-
}
986-
}
987-
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_msg[..]));
988-
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_update_msg[..]));
989-
self.do_attempt_write_data(&mut (*descriptor).clone(), peer);
990-
}
1029+
broadcast_msgs!({ |peer: & &mut Peer, _| !peer.should_forward_channel_announcement(msg.contents.short_channel_id),
1030+
|_, their_node_id| their_node_id == msg.contents.node_id_1,
1031+
|_, their_node_id| their_node_id == msg.contents.node_id_2 },
1032+
{ encoded_msg, encoded_update_msg });
9911033
}
9921034
},
9931035
MessageSendEvent::BroadcastNodeAnnouncement { ref msg } => {
9941036
log_trace!(self.logger, "Handling BroadcastNodeAnnouncement event in peer_handler");
9951037
if self.message_handler.route_handler.handle_node_announcement(msg).is_ok() {
9961038
let encoded_msg = encode_msg!(msg);
9971039

998-
for (ref descriptor, ref mut peer) in peers.peers.iter_mut() {
999-
if !peer.channel_encryptor.is_ready_for_encryption() || peer.their_features.is_none() ||
1000-
!peer.should_forward_node_announcement(msg.contents.node_id) {
1001-
continue
1002-
}
1003-
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_msg[..]));
1004-
self.do_attempt_write_data(&mut (*descriptor).clone(), peer);
1005-
}
1040+
broadcast_msgs!({ |peer: & &mut Peer, _| !peer.should_forward_node_announcement(msg.contents.node_id),
1041+
|_, their_node_id| their_node_id == msg.contents.node_id },
1042+
{ encoded_msg });
10061043
}
10071044
},
10081045
MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
10091046
log_trace!(self.logger, "Handling BroadcastChannelUpdate event in peer_handler for short channel id {}", msg.contents.short_channel_id);
10101047
if self.message_handler.route_handler.handle_channel_update(msg).is_ok() {
10111048
let encoded_msg = encode_msg!(msg);
10121049

1013-
for (ref descriptor, ref mut peer) in peers.peers.iter_mut() {
1014-
if !peer.channel_encryptor.is_ready_for_encryption() || peer.their_features.is_none() ||
1015-
!peer.should_forward_channel_announcement(msg.contents.short_channel_id) {
1016-
continue
1017-
}
1018-
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_msg[..]));
1019-
self.do_attempt_write_data(&mut (*descriptor).clone(), peer);
1020-
}
1050+
broadcast_msgs!({ |peer: & &mut Peer, _| !peer.should_forward_channel_announcement(msg.contents.short_channel_id) },
1051+
{ encoded_msg });
10211052
}
10221053
},
10231054
MessageSendEvent::PaymentFailureNetworkUpdate { ref update } => {

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