// Copyright 2015-2017 Parity Technologies (UK) Ltd. // This file is part of Parity. // Parity is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // Parity is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License // along with Parity. If not, see . use util::*; use network::*; use tests::snapshot::*; use ethcore::client::{TestBlockChainClient, BlockChainClient, Client as EthcoreClient, ClientConfig, ChainNotify}; use ethcore::header::BlockNumber; use ethcore::snapshot::SnapshotService; use ethcore::spec::Spec; use ethcore::account_provider::AccountProvider; use ethcore::miner::Miner; use sync_io::SyncIo; use io::IoChannel; use api::WARP_SYNC_PROTOCOL_ID; use chain::ChainSync; use ::SyncConfig; pub trait FlushingBlockChainClient: BlockChainClient { fn flush(&self) {} } impl FlushingBlockChainClient for EthcoreClient { fn flush(&self) { self.flush_queue(); } } impl FlushingBlockChainClient for TestBlockChainClient {} pub struct TestIo<'p, C> where C: FlushingBlockChainClient, C: 'p { pub chain: &'p C, pub snapshot_service: &'p TestSnapshotService, pub queue: &'p RwLock>, pub sender: Option, pub to_disconnect: HashSet, pub packets: Vec, pub peers_info: HashMap, overlay: RwLock>, } impl<'p, C> TestIo<'p, C> where C: FlushingBlockChainClient, C: 'p { pub fn new(chain: &'p C, ss: &'p TestSnapshotService, queue: &'p RwLock>, sender: Option) -> TestIo<'p, C> { TestIo { chain: chain, snapshot_service: ss, queue: queue, sender: sender, to_disconnect: HashSet::new(), overlay: RwLock::new(HashMap::new()), packets: Vec::new(), peers_info: HashMap::new(), } } } impl<'p, C> Drop for TestIo<'p, C> where C: FlushingBlockChainClient, C: 'p { fn drop(&mut self) { self.queue.write().extend(self.packets.drain(..)); } } impl<'p, C> SyncIo for TestIo<'p, C> where C: FlushingBlockChainClient, C: 'p { fn disable_peer(&mut self, peer_id: PeerId) { self.disconnect_peer(peer_id); } fn disconnect_peer(&mut self, peer_id: PeerId) { self.to_disconnect.insert(peer_id); } fn is_expired(&self) -> bool { false } fn respond(&mut self, packet_id: PacketId, data: Vec) -> Result<(), NetworkError> { self.packets.push(TestPacket { data: data, packet_id: packet_id, recipient: self.sender.unwrap() }); Ok(()) } fn send(&mut self, peer_id: PeerId, packet_id: PacketId, data: Vec) -> Result<(), NetworkError> { self.packets.push(TestPacket { data: data, packet_id: packet_id, recipient: peer_id, }); Ok(()) } fn send_protocol(&mut self, _protocol: ProtocolId, peer_id: PeerId, packet_id: PacketId, data: Vec) -> Result<(), NetworkError> { self.send(peer_id, packet_id, data) } fn chain(&self) -> &BlockChainClient { &*self.chain } fn peer_info(&self, peer_id: PeerId) -> String { self.peers_info.get(&peer_id) .cloned() .unwrap_or_else(|| peer_id.to_string()) } fn snapshot_service(&self) -> &SnapshotService { self.snapshot_service } fn peer_session_info(&self, _peer_id: PeerId) -> Option { None } fn eth_protocol_version(&self, _peer: PeerId) -> u8 { 63 } fn protocol_version(&self, protocol: &ProtocolId, peer_id: PeerId) -> u8 { if protocol == &WARP_SYNC_PROTOCOL_ID { 2 } else { self.eth_protocol_version(peer_id) } } fn chain_overlay(&self) -> &RwLock> { &self.overlay } } /// Abstract messages between peers. pub trait Message { /// The intended recipient of this message. fn recipient(&self) -> PeerId; } /// Mock subprotocol packet pub struct TestPacket { pub data: Bytes, pub packet_id: PacketId, pub recipient: PeerId, } impl Message for TestPacket { fn recipient(&self) -> PeerId { self.recipient } } /// A peer which can be a member of the `TestNet`. pub trait Peer { type Message: Message; /// Called on connection to other indicated peer. fn on_connect(&self, other: PeerId); /// Called on disconnect from other indicated peer. fn on_disconnect(&self, other: PeerId); /// Receive a message from another peer. Return a set of peers to disconnect. fn receive_message(&self, from: PeerId, msg: Self::Message) -> HashSet; /// Produce the next pending message to send to another peer. fn pending_message(&self) -> Option; /// Whether this peer is done syncing (has no messages to send). fn is_done(&self) -> bool; /// Execute a "sync step". This is called for each peer after it sends a packet. fn sync_step(&self); /// Restart sync for a peer. fn restart_sync(&self); } pub struct EthPeer where C: FlushingBlockChainClient { pub chain: Arc, pub snapshot_service: Arc, pub sync: RwLock, pub queue: RwLock>, } impl Peer for EthPeer { type Message = TestPacket; fn on_connect(&self, other: PeerId) { self.sync.write().update_targets(&*self.chain); self.sync.write().on_peer_connected(&mut TestIo::new(&*self.chain, &self.snapshot_service, &self.queue, Some(other)), other); } fn on_disconnect(&self, other: PeerId) { let mut io = TestIo::new(&*self.chain, &self.snapshot_service, &self.queue, Some(other)); self.sync.write().on_peer_aborting(&mut io, other); } fn receive_message(&self, from: PeerId, msg: TestPacket) -> HashSet { let mut io = TestIo::new(&*self.chain, &self.snapshot_service, &self.queue, Some(from)); ChainSync::dispatch_packet(&self.sync, &mut io, from, msg.packet_id, &msg.data); self.chain.flush(); io.to_disconnect.clone() } fn pending_message(&self) -> Option { self.chain.flush(); self.queue.write().pop_front() } fn is_done(&self) -> bool { self.queue.read().is_empty() } fn sync_step(&self) { self.chain.flush(); self.sync.write().maintain_peers(&mut TestIo::new(&*self.chain, &self.snapshot_service, &self.queue, None)); self.sync.write().maintain_sync(&mut TestIo::new(&*self.chain, &self.snapshot_service, &self.queue, None)); self.sync.write().propagate_new_transactions(&mut TestIo::new(&*self.chain, &self.snapshot_service, &self.queue, None)); } fn restart_sync(&self) { self.sync.write().restart(&mut TestIo::new(&*self.chain, &self.snapshot_service, &self.queue, None)); } } pub struct TestNet

{ pub peers: Vec>, pub started: bool, pub disconnect_events: Vec<(PeerId, PeerId)>, //disconnected (initiated by, to) } impl TestNet> { pub fn new(n: usize) -> Self { Self::new_with_config(n, SyncConfig::default()) } pub fn new_with_fork(n: usize, fork: Option<(BlockNumber, H256)>) -> Self { let mut config = SyncConfig::default(); config.fork_block = fork; Self::new_with_config(n, config) } pub fn new_with_config(n: usize, config: SyncConfig) -> Self { let mut net = TestNet { peers: Vec::new(), started: false, disconnect_events: Vec::new(), }; for _ in 0..n { let chain = TestBlockChainClient::new(); let ss = Arc::new(TestSnapshotService::new()); let sync = ChainSync::new(config.clone(), &chain); net.peers.push(Arc::new(EthPeer { sync: RwLock::new(sync), snapshot_service: ss, chain: Arc::new(chain), queue: RwLock::new(VecDeque::new()), })); } net } } impl TestNet> { pub fn with_spec_and_accounts(n: usize, config: SyncConfig, spec_factory: F, accounts: Option>) -> Self where F: Fn() -> Spec { let mut net = TestNet { peers: Vec::new(), started: false, disconnect_events: Vec::new(), }; for _ in 0..n { let spec = spec_factory(); let client = EthcoreClient::new( ClientConfig::default(), &spec, Arc::new(::util::kvdb::in_memory(::ethcore::db::NUM_COLUMNS.unwrap_or(0))), Arc::new(Miner::with_spec_and_accounts(&spec, accounts.clone())), IoChannel::disconnected(), ).unwrap(); let ss = Arc::new(TestSnapshotService::new()); let sync = ChainSync::new(config.clone(), &*client); let peer = Arc::new(EthPeer { sync: RwLock::new(sync), snapshot_service: ss, chain: client, queue: RwLock::new(VecDeque::new()), }); peer.chain.add_notify(peer.clone()); net.peers.push(peer); } net } } impl

TestNet

where P: Peer { pub fn peer(&self, i: usize) -> &P { &self.peers[i] } pub fn start(&mut self) { if self.started { return; } for peer in 0..self.peers.len() { for client in 0..self.peers.len() { if peer != client { self.peers[peer].on_connect(client as PeerId); } } } self.started = true; } pub fn sync_step(&mut self) { for peer in 0..self.peers.len() { let packet = self.peers[peer].pending_message(); if let Some(packet) = packet { let disconnecting = { let recipient = packet.recipient(); trace!("--- {} -> {} ---", peer, recipient); let to_disconnect = self.peers[recipient].receive_message(peer as PeerId, packet); for d in &to_disconnect { // notify this that disconnecting peers are disconnecting self.peers[recipient].on_disconnect(*d as PeerId); self.disconnect_events.push((peer, *d)); } to_disconnect }; for d in &disconnecting { // notify other peers that this peer is disconnecting self.peers[*d].on_disconnect(peer as PeerId); } } self.sync_step_peer(peer); } } pub fn sync_step_peer(&mut self, peer_num: usize) { self.peers[peer_num].sync_step(); } pub fn restart_peer(&mut self, i: usize) { self.peers[i].restart_sync(); } pub fn sync(&mut self) -> u32 { self.start(); let mut total_steps = 0; while !self.done() { self.sync_step(); total_steps += 1; } total_steps } pub fn sync_steps(&mut self, count: usize) { self.start(); for _ in 0..count { self.sync_step(); } } pub fn done(&self) -> bool { self.peers.iter().all(|p| p.is_done()) } } impl TestNet> { // relies on Arc uniqueness, which is only true when we haven't registered a ChainNotify. pub fn peer_mut(&mut self, i: usize) -> &mut EthPeer { Arc::get_mut(&mut self.peers[i]).expect("Arc never exposed externally") } } impl TestNet> { pub fn trigger_chain_new_blocks(&mut self, peer_id: usize) { let peer = &mut self.peers[peer_id]; peer.sync.write().chain_new_blocks(&mut TestIo::new(&*peer.chain, &peer.snapshot_service, &peer.queue, None), &[], &[], &[], &[], &[], &[]); } } impl ChainNotify for EthPeer { fn new_blocks(&self, imported: Vec, invalid: Vec, enacted: Vec, retracted: Vec, sealed: Vec, proposed: Vec, _duration: u64) { let mut io = TestIo::new(&*self.chain, &self.snapshot_service, &self.queue, None); self.sync.write().chain_new_blocks( &mut io, &imported, &invalid, &enacted, &retracted, &sealed, &proposed); } fn start(&self) {} fn stop(&self) {} fn broadcast(&self, message: Vec) { let mut io = TestIo::new(&*self.chain, &self.snapshot_service, &self.queue, None); self.sync.write().propagate_consensus_packet(&mut io, message.clone()); } }