From: Valentine Wallace Date: Fri, 20 Mar 2020 22:42:02 +0000 (-0400) Subject: Test that do_attempt_write_data does not infinitely loop X-Git-Tag: v0.0.12~92^2 X-Git-Url: http://git.bitcoin.ninja/?a=commitdiff_plain;h=3e0aed23a3d517161261be3c2e7e5ff83bca67e8;p=rust-lightning Test that do_attempt_write_data does not infinitely loop when all the channel messages can't fit into the buffer. Adds a test for PR #550. --- diff --git a/lightning/src/ln/peer_handler.rs b/lightning/src/ln/peer_handler.rs index cd4d9142d..fc6d1cbcd 100644 --- a/lightning/src/ln/peer_handler.rs +++ b/lightning/src/ln/peer_handler.rs @@ -1149,8 +1149,13 @@ impl PeerManager where #[cfg(test)] mod tests { + use secp256k1::Signature; + use bitcoin::BitcoinHash; + use bitcoin::network::constants::Network; + use bitcoin::blockdata::constants::genesis_block; use ln::peer_handler::{PeerManager, MessageHandler, SocketDescriptor}; use ln::msgs; + use ln::features::ChannelFeatures; use util::events; use util::test_utils; use util::logger::Logger; @@ -1161,7 +1166,9 @@ mod tests { use rand::{thread_rng, Rng}; use std; + use std::cmp::min; use std::sync::{Arc, Mutex}; + use std::sync::atomic::{AtomicUsize, Ordering}; #[derive(Clone)] struct FileDescriptor { @@ -1199,7 +1206,7 @@ mod tests { chan_handlers } - fn create_network<'a>(peer_count: usize, chan_handlers: &'a Vec) -> Vec> { + fn create_network<'a>(peer_count: usize, chan_handlers: &'a Vec, routing_handlers: Option<&'a Vec>>) -> Vec> { let mut peers = Vec::new(); let mut rng = thread_rng(); let logger : Arc = Arc::new(test_utils::TestLogger::new()); @@ -1207,13 +1214,15 @@ mod tests { rng.fill_bytes(&mut ephemeral_bytes); for i in 0..peer_count { - let router = test_utils::TestRoutingMessageHandler::new(); + let router = if let Some(routers) = routing_handlers { routers[i].clone() } else { + Arc::new(test_utils::TestRoutingMessageHandler::new()) + }; let node_id = { let mut key_slice = [0;32]; rng.fill_bytes(&mut key_slice); SecretKey::from_slice(&key_slice).unwrap() }; - let msg_handler = MessageHandler { chan_handler: &chan_handlers[i], route_handler: Arc::new(router) }; + let msg_handler = MessageHandler { chan_handler: &chan_handlers[i], route_handler: router }; let peer = PeerManager::new(msg_handler, node_id, &ephemeral_bytes, Arc::clone(&logger)); peers.push(peer); } @@ -1221,7 +1230,7 @@ mod tests { peers } - fn establish_connection<'a>(peer_a: &PeerManager, peer_b: &PeerManager) { + fn establish_connection<'a>(peer_a: &PeerManager, peer_b: &PeerManager) -> (FileDescriptor, FileDescriptor) { let secp_ctx = Secp256k1::new(); let a_id = PublicKey::from_secret_key(&secp_ctx, &peer_a.our_node_secret); let mut fd_a = FileDescriptor { fd: 1, outbound_data: Arc::new(Mutex::new(Vec::new())) }; @@ -1231,6 +1240,7 @@ mod tests { assert_eq!(peer_a.read_event(&mut fd_a, &initial_data).unwrap(), false); assert_eq!(peer_b.read_event(&mut fd_b, &fd_a.outbound_data.lock().unwrap().split_off(0)).unwrap(), false); assert_eq!(peer_a.read_event(&mut fd_a, &fd_b.outbound_data.lock().unwrap().split_off(0)).unwrap(), false); + (fd_a.clone(), fd_b.clone()) } #[test] @@ -1239,7 +1249,7 @@ mod tests { // push a DisconnectPeer event to remove the node flagged by id let chan_handlers = create_chan_handlers(2); let chan_handler = test_utils::TestChannelMessageHandler::new(); - let mut peers = create_network(2, &chan_handlers); + let mut peers = create_network(2, &chan_handlers, None); establish_connection(&peers[0], &peers[1]); assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1); @@ -1256,11 +1266,12 @@ mod tests { peers[0].process_events(); assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 0); } + #[test] - fn test_timer_tick_occured(){ + fn test_timer_tick_occurred() { // Create peers, a vector of two peer managers, perform initial set up and check that peers[0] has one Peer. let chan_handlers = create_chan_handlers(2); - let peers = create_network(2, &chan_handlers); + let peers = create_network(2, &chan_handlers, None); establish_connection(&peers[0], &peers[1]); assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1); @@ -1272,4 +1283,138 @@ mod tests { peers[0].timer_tick_occured(); assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 0); } + + pub struct TestRoutingMessageHandler { + pub chan_upds_recvd: AtomicUsize, + pub chan_anns_recvd: AtomicUsize, + pub chan_anns_sent: AtomicUsize, + } + + impl TestRoutingMessageHandler { + pub fn new() -> Self { + TestRoutingMessageHandler { + chan_upds_recvd: AtomicUsize::new(0), + chan_anns_recvd: AtomicUsize::new(0), + chan_anns_sent: AtomicUsize::new(0), + } + } + + } + impl msgs::RoutingMessageHandler for TestRoutingMessageHandler { + fn handle_node_announcement(&self, _msg: &msgs::NodeAnnouncement) -> Result { + Err(msgs::LightningError { err: "", action: msgs::ErrorAction::IgnoreError }) + } + fn handle_channel_announcement(&self, _msg: &msgs::ChannelAnnouncement) -> Result { + self.chan_anns_recvd.fetch_add(1, Ordering::AcqRel); + Err(msgs::LightningError { err: "", action: msgs::ErrorAction::IgnoreError }) + } + fn handle_channel_update(&self, _msg: &msgs::ChannelUpdate) -> Result { + self.chan_upds_recvd.fetch_add(1, Ordering::AcqRel); + Err(msgs::LightningError { err: "", action: msgs::ErrorAction::IgnoreError }) + } + fn handle_htlc_fail_channel_update(&self, _update: &msgs::HTLCFailChannelUpdate) {} + fn get_next_channel_announcements(&self, starting_point: u64, batch_amount: u8) -> Vec<(msgs::ChannelAnnouncement, msgs::ChannelUpdate,msgs::ChannelUpdate)> { + let mut chan_anns = Vec::new(); + const TOTAL_UPDS: u64 = 100; + let end: u64 = min(starting_point + batch_amount as u64, TOTAL_UPDS - self.chan_anns_sent.load(Ordering::Acquire) as u64); + for i in starting_point..end { + let chan_upd_1 = get_dummy_channel_update(i); + let chan_upd_2 = get_dummy_channel_update(i); + let chan_ann = get_dummy_channel_announcement(i); + + chan_anns.push((chan_ann, chan_upd_1, chan_upd_2)); + } + + self.chan_anns_sent.fetch_add(chan_anns.len(), Ordering::AcqRel); + chan_anns + } + + fn get_next_node_announcements(&self, _starting_point: Option<&PublicKey>, _batch_amount: u8) -> Vec { + Vec::new() + } + + fn should_request_full_sync(&self, _node_id: &PublicKey) -> bool { + true + } + } + + fn get_dummy_channel_announcement(short_chan_id: u64) -> msgs::ChannelAnnouncement { + use secp256k1::ffi::Signature as FFISignature; + let secp_ctx = Secp256k1::new(); + let network = Network::Testnet; + let node_1_privkey = SecretKey::from_slice(&[42; 32]).unwrap(); + let node_2_privkey = SecretKey::from_slice(&[41; 32]).unwrap(); + let node_1_btckey = SecretKey::from_slice(&[40; 32]).unwrap(); + let node_2_btckey = SecretKey::from_slice(&[39; 32]).unwrap(); + let unsigned_ann = msgs::UnsignedChannelAnnouncement { + features: ChannelFeatures::supported(), + chain_hash: genesis_block(network).header.bitcoin_hash(), + short_channel_id: short_chan_id, + node_id_1: PublicKey::from_secret_key(&secp_ctx, &node_1_privkey), + node_id_2: PublicKey::from_secret_key(&secp_ctx, &node_2_privkey), + bitcoin_key_1: PublicKey::from_secret_key(&secp_ctx, &node_1_btckey), + bitcoin_key_2: PublicKey::from_secret_key(&secp_ctx, &node_2_btckey), + excess_data: Vec::new(), + }; + + msgs::ChannelAnnouncement { + node_signature_1: Signature::from(FFISignature::new()), + node_signature_2: Signature::from(FFISignature::new()), + bitcoin_signature_1: Signature::from(FFISignature::new()), + bitcoin_signature_2: Signature::from(FFISignature::new()), + contents: unsigned_ann, + } + } + + fn get_dummy_channel_update(short_chan_id: u64) -> msgs::ChannelUpdate { + use secp256k1::ffi::Signature as FFISignature; + let network = Network::Testnet; + msgs::ChannelUpdate { + signature: Signature::from(FFISignature::new()), + contents: msgs::UnsignedChannelUpdate { + chain_hash: genesis_block(network).header.bitcoin_hash(), + short_channel_id: short_chan_id, + timestamp: 0, + flags: 0, + cltv_expiry_delta: 0, + htlc_minimum_msat: 0, + fee_base_msat: 0, + fee_proportional_millionths: 0, + excess_data: vec![], + } + } + } + + #[test] + fn test_do_attempt_write_data() { + // Create 2 peers with custom TestRoutingMessageHandlers and connect them. + let chan_handlers = create_chan_handlers(2); + let mut routing_handlers: Vec> = Vec::new(); + let mut routing_handlers_concrete: Vec> = Vec::new(); + for _ in 0..2 { + let routing_handler = Arc::new(TestRoutingMessageHandler::new()); + routing_handlers.push(routing_handler.clone()); + routing_handlers_concrete.push(routing_handler.clone()); + } + let peers = create_network(2, &chan_handlers, Some(&routing_handlers)); + + // By calling establish_connect, we trigger do_attempt_write_data between + // the peers. Previously this function would mistakenly enter an infinite loop + // when there were more channel messages available than could fit into a peer's + // buffer. This issue would now be detected by this test (because we use custom + // RoutingMessageHandlers that intentionally return more channel messages + // than can fit into a peer's buffer). + let (mut fd_a, mut fd_b) = establish_connection(&peers[0], &peers[1]); + + // Make each peer to read the messages that the other peer just wrote to them. + peers[1].read_event(&mut fd_b, &fd_a.outbound_data.lock().unwrap().split_off(0)).unwrap(); + peers[0].read_event(&mut fd_a, &fd_b.outbound_data.lock().unwrap().split_off(0)).unwrap(); + + // Check that each peer has received the expected number of channel updates and channel + // announcements. + assert_eq!(routing_handlers_concrete[0].clone().chan_upds_recvd.load(Ordering::Acquire), 100); + assert_eq!(routing_handlers_concrete[0].clone().chan_anns_recvd.load(Ordering::Acquire), 50); + assert_eq!(routing_handlers_concrete[1].clone().chan_upds_recvd.load(Ordering::Acquire), 100); + assert_eq!(routing_handlers_concrete[1].clone().chan_anns_recvd.load(Ordering::Acquire), 50); + } }