From d3f61c0ad7237c4a191a2eba9e2ed24a7d36e39b Mon Sep 17 00:00:00 2001 From: Matt Corallo Date: Sun, 7 Feb 2021 18:49:48 -0500 Subject: [PATCH] Add test for error message hangline resulting in force-close --- lightning/src/ln/functional_tests.rs | 63 ++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) diff --git a/lightning/src/ln/functional_tests.rs b/lightning/src/ln/functional_tests.rs index 10c16c75b..77b791e01 100644 --- a/lightning/src/ln/functional_tests.rs +++ b/lightning/src/ln/functional_tests.rs @@ -8836,3 +8836,66 @@ fn test_duplicate_chan_id() { update_nodes_with_chan_announce(&nodes, 0, 1, &announcement, &as_update, &bs_update); send_payment(&nodes[0], &[&nodes[1]], 8000000, 8_000_000); } + +#[test] +fn test_error_chans_closed() { + // Test that we properly handle error messages, closing appropriate channels. + // + // Prior to #787 we'd allow a peer to make us force-close a channel we had with a different + // peer. The "real" fix for that is to index channels with peers_ids, however in the mean time + // we can test various edge cases around it to ensure we don't regress. + let chanmon_cfgs = create_chanmon_cfgs(3); + let node_cfgs = create_node_cfgs(3, &chanmon_cfgs); + let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]); + let nodes = create_network(3, &node_cfgs, &node_chanmgrs); + + // Create some initial channels + let chan_1 = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, 10001, InitFeatures::known(), InitFeatures::known()); + let chan_2 = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, 10001, InitFeatures::known(), InitFeatures::known()); + let chan_3 = create_announced_chan_between_nodes_with_value(&nodes, 0, 2, 100000, 10001, InitFeatures::known(), InitFeatures::known()); + + assert_eq!(nodes[0].node.list_usable_channels().len(), 3); + assert_eq!(nodes[1].node.list_usable_channels().len(), 2); + assert_eq!(nodes[2].node.list_usable_channels().len(), 1); + + // Closing a channel from a different peer has no effect + nodes[0].node.handle_error(&nodes[1].node.get_our_node_id(), &msgs::ErrorMessage { channel_id: chan_3.2, data: "ERR".to_owned() }); + assert_eq!(nodes[0].node.list_usable_channels().len(), 3); + + // Closing one channel doesn't impact others + nodes[0].node.handle_error(&nodes[1].node.get_our_node_id(), &msgs::ErrorMessage { channel_id: chan_2.2, data: "ERR".to_owned() }); + check_added_monitors!(nodes[0], 1); + check_closed_broadcast!(nodes[0], false); + assert_eq!(nodes[0].node.list_usable_channels().len(), 2); + assert!(nodes[0].node.list_usable_channels()[0].channel_id == chan_1.2 || nodes[0].node.list_usable_channels()[1].channel_id == chan_1.2); + assert!(nodes[0].node.list_usable_channels()[0].channel_id == chan_3.2 || nodes[0].node.list_usable_channels()[1].channel_id == chan_3.2); + + // A null channel ID should close all channels + let _chan_4 = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, 10001, InitFeatures::known(), InitFeatures::known()); + nodes[0].node.handle_error(&nodes[1].node.get_our_node_id(), &msgs::ErrorMessage { channel_id: [0; 32], data: "ERR".to_owned() }); + check_added_monitors!(nodes[0], 2); + let events = nodes[0].node.get_and_clear_pending_msg_events(); + assert_eq!(events.len(), 2); + match events[0] { + MessageSendEvent::BroadcastChannelUpdate { ref msg } => { + assert_eq!(msg.contents.flags & 2, 2); + }, + _ => panic!("Unexpected event"), + } + match events[1] { + MessageSendEvent::BroadcastChannelUpdate { ref msg } => { + assert_eq!(msg.contents.flags & 2, 2); + }, + _ => panic!("Unexpected event"), + } + // Note that at this point users of a standard PeerHandler will end up calling + // peer_disconnected with no_connection_possible set to false, duplicating the + // close-all-channels logic. That's OK, we don't want to end up not force-closing channels for + // users with their own peer handling logic. We duplicate the call here, however. + assert_eq!(nodes[0].node.list_usable_channels().len(), 1); + assert!(nodes[0].node.list_usable_channels()[0].channel_id == chan_3.2); + + nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), true); + assert_eq!(nodes[0].node.list_usable_channels().len(), 1); + assert!(nodes[0].node.list_usable_channels()[0].channel_id == chan_3.2); +} -- 2.39.5