Network start/stop

ethcore/src/service.rs

@@ -41,24 +41,31 @@ pub enum SyncMessage {
 	NewChainHead,
 	/// A block is ready
 	BlockVerified,
+	/// Start network command.
+	StartNetwork,
+	/// Stop network command.
+	StopNetwork,
 }
 
 /// IO Message type used for Network service
 pub type NetSyncMessage = NetworkIoMessage<SyncMessage>;
 
 /// Client service setup. Creates and registers client and network services with the IO subsystem.
 pub struct ClientService {
-	net_service: NetworkService<SyncMessage>,
+	net_service: Arc<NetworkService<SyncMessage>>,
 	client: Arc<Client>,
 	panic_handler: Arc<PanicHandler>
 }
 
 impl ClientService {
 	/// Start the service in a separate thread.
-	pub fn start(config: ClientConfig, spec: Spec, net_config: NetworkConfiguration, db_path: &Path, miner: Arc<Miner>) -> Result<ClientService, Error> {
+	pub fn start(config: ClientConfig, spec: Spec, net_config: NetworkConfiguration, db_path: &Path, miner: Arc<Miner>, enable_network: bool) -> Result<ClientService, Error> {
 		let panic_handler = PanicHandler::new_in_arc();
-		let mut net_service = try!(NetworkService::start(net_config));
+		let net_service = try!(NetworkService::new(net_config));
 		panic_handler.forward_from(&net_service);
+		if enable_network {
+			try!(net_service.start());
+		}
 
 		info!("Starting {}", net_service.host_info());
 		info!("Configured for {} using {:?} engine", spec.name, spec.engine.name());
@@ -70,7 +77,7 @@ impl ClientService {
 		try!(net_service.io().register_handler(client_io));
 
 		Ok(ClientService {
-			net_service: net_service,
+			net_service: Arc::new(net_service),
 			client: client,
 			panic_handler: panic_handler,
 		})
@@ -82,8 +89,8 @@ impl ClientService {
 	}
 
 	/// Get general IO interface
-	pub fn io(&mut self) -> &mut IoService<NetSyncMessage> {
-		self.net_service.io()
+	pub fn register_io_handler(&self, handler: Arc<IoHandler<NetSyncMessage> + Send>) -> Result<(), IoError> {
+		self.net_service.io().register_handler(handler)
 	}
 
 	/// Get client interface
@@ -92,8 +99,8 @@ impl ClientService {
 	}
 
 	/// Get network service component
-	pub fn network(&mut self) -> &mut NetworkService<SyncMessage> {
-		&mut self.net_service
+	pub fn network(&mut self) -> Arc<NetworkService<SyncMessage>> {
+		self.net_service.clone()
 	}
 }
 
@@ -149,7 +156,7 @@ mod tests {
 	fn it_can_be_started() {
 		let spec = get_test_spec();
 		let temp_path = RandomTempPath::new();
-		let service = ClientService::start(ClientConfig::default(), spec, NetworkConfiguration::new_local(), &temp_path.as_path(), Arc::new(Miner::default()));
+		let service = ClientService::start(ClientConfig::default(), spec, NetworkConfiguration::new_local(), &temp_path.as_path(), Arc::new(Miner::default()), false);
 		assert!(service.is_ok());
 	}
 }

parity/cli.rs

@@ -52,6 +52,7 @@ Account Options:
   --no-import-keys         Do not import keys from legacy clients.
 
 Networking Options:
+  --no-network             Disable p2p networking.
   --port PORT              Override the port on which the node should listen
                            [default: 30303].
   --peers NUM              Try to maintain that many peers [default: 25].
@@ -266,6 +267,7 @@ pub struct Args {
 	pub flag_format: Option<String>,
 	pub flag_jitvm: bool,
 	pub flag_no_color: bool,
+	pub flag_no_network: bool,
 	// legacy...
 	pub flag_geth: bool,
 	pub flag_nodekey: Option<String>,

parity/io_handler.rs

@@ -16,10 +16,10 @@
 
 use std::sync::Arc;
 use ethcore::client::Client;
-use ethcore::service::NetSyncMessage;
+use ethcore::service::{NetSyncMessage, SyncMessage};
 use ethsync::EthSync;
 use util::keys::store::AccountService;
-use util::{TimerToken, IoHandler, IoContext};
+use util::{TimerToken, IoHandler, IoContext, NetworkService, NetworkIoMessage};
 
 use informant::Informant;
 
@@ -33,6 +33,7 @@ pub struct ClientIoHandler {
 	pub sync: Arc<EthSync>,
 	pub accounts: Arc<AccountService>,
 	pub info: Informant,
+	pub network: Arc<NetworkService<SyncMessage>>,
 }
 
 impl IoHandler<NetSyncMessage> for ClientIoHandler {
@@ -48,6 +49,21 @@ impl IoHandler<NetSyncMessage> for ClientIoHandler {
 			_ => {}
 		}
 	}
+
+	fn message(&self, _io: &IoContext<NetSyncMessage>, message: &NetSyncMessage) {
+		match *message {
+			NetworkIoMessage::User(SyncMessage::StartNetwork) => {
+				info!("Starting network");
+				self.network.start().unwrap_or_else(|e| warn!("Error starting network: {:?}", e));
+				EthSync::register(&*self.network, self.sync.clone()).unwrap_or_else(|e| warn!("Error registering eth protocol handler: {}", e));
+			},
+			NetworkIoMessage::User(SyncMessage::StopNetwork) => {
+				info!("Stopping network");
+				self.network.stop().unwrap_or_else(|e| warn!("Error stopping network: {:?}", e));
+			},
+			_ => {/* Ignore other messages */},
+		}
+	}
 }
 
 

parity/main.rs

@@ -79,7 +79,7 @@ use std::thread::sleep;
 use std::time::Duration;
 use rustc_serialize::hex::FromHex;
 use ctrlc::CtrlC;
-use util::{H256, ToPretty, NetworkConfiguration, PayloadInfo, Bytes};
+use util::{H256, ToPretty, NetworkConfiguration, PayloadInfo, Bytes, UtilError};
 use util::panics::{MayPanic, ForwardPanic, PanicHandler};
 use ethcore::client::{BlockID, BlockChainClient, ClientConfig, get_db_path};
 use ethcore::error::{Error, ImportError};
@@ -198,7 +198,7 @@ fn execute_client(conf: Configuration, spec: Spec, client_config: ClientConfig)
 
 	// Build client
 	let mut service = ClientService::start(
-		client_config, spec, net_settings, Path::new(&conf.path()), miner.clone()
+		client_config, spec, net_settings, Path::new(&conf.path()), miner.clone(), !conf.args.flag_no_network
 	).unwrap_or_else(|e| die_with_error("Client", e));
 
 	panic_handler.forward_from(&service);
@@ -208,7 +208,8 @@ fn execute_client(conf: Configuration, spec: Spec, client_config: ClientConfig)
 	let network_settings = Arc::new(conf.network_settings());
 
 	// Sync
-	let sync = EthSync::register(service.network(), sync_config, client.clone());
+	let sync = EthSync::new(sync_config, client.clone());
+	EthSync::register(&*service.network(), sync.clone()).unwrap_or_else(|e| die_with_error("Error registering eth protocol handler", UtilError::from(e).into()));
 
 	let deps_for_rpc_apis = Arc::new(rpc_apis::Dependencies {
 		signer_port: conf.signer_port(),
@@ -269,8 +270,9 @@ fn execute_client(conf: Configuration, spec: Spec, client_config: ClientConfig)
 		info: Informant::new(conf.have_color()),
 		sync: sync.clone(),
 		accounts: account_service.clone(),
+		network: service.network(),
 	});
-	service.io().register_handler(io_handler).expect("Error registering IO handler");
+	service.register_io_handler(io_handler).expect("Error registering IO handler");
 
 	// Handle exit
 	wait_for_exit(panic_handler, rpc_server, dapps_server, signer_server);
@@ -309,7 +311,7 @@ fn execute_export(conf: Configuration) {
 
 	// Build client
 	let service = ClientService::start(
-		client_config, spec, net_settings, Path::new(&conf.path()), Arc::new(Miner::default()),
+		client_config, spec, net_settings, Path::new(&conf.path()), Arc::new(Miner::default()), false
 	).unwrap_or_else(|e| die_with_error("Client", e));
 
 	panic_handler.forward_from(&service);
@@ -380,7 +382,7 @@ fn execute_import(conf: Configuration) {
 
 	// Build client
 	let service = ClientService::start(
-		client_config, spec, net_settings, Path::new(&conf.path()), Arc::new(Miner::default()),
+		client_config, spec, net_settings, Path::new(&conf.path()), Arc::new(Miner::default()), false
 	).unwrap_or_else(|e| die_with_error("Client", e));
 
 	panic_handler.forward_from(&service);

rpc/src/v1/impls/net.rs

@@ -47,4 +47,14 @@ impl<S> Net for NetClient<S> where S: SyncProvider + 'static {
 		// right now (11 march 2016), we are always listening for incoming connections
 		Ok(Value::Bool(true))
 	}
+
+	fn start_network(&self, _: Params) -> Result<Value, Error> {
+		take_weak!(self.sync).start_network();
+		Ok(Value::Bool(true))
+	}
+
+	fn stop_network(&self, _: Params) -> Result<Value, Error> {
+		take_weak!(self.sync).stop_network();
+		Ok(Value::Bool(true))
+	}
 }

rpc/src/v1/tests/helpers/sync_provider.rs

@@ -59,5 +59,11 @@ impl SyncProvider for TestSyncProvider {
 	fn status(&self) -> SyncStatus {
 		self.status.read().unwrap().clone()
 	}
+
+	fn start_network(&self) {
+	}
+
+	fn stop_network(&self) {
+	}
 }
 

rpc/src/v1/traits/net.rs

@@ -30,6 +30,12 @@ pub trait Net: Sized + Send + Sync + 'static {
 	/// Otherwise false.
 	fn is_listening(&self, _: Params) -> Result<Value, Error>;
 
+	/// Start the network.
+	fn start_network(&self, _: Params) -> Result<Value, Error>;
+
+	/// Stop the network.
+	fn stop_network(&self, _: Params) -> Result<Value, Error>;
+
 	/// Should be used to convert object to io delegate.
 	fn to_delegate(self) -> IoDelegate<Self> {
 		let mut delegate = IoDelegate::new(Arc::new(self));

sync/src/chain.rs

@@ -356,6 +356,10 @@ impl ChainSync {
 		};
 
 		trace!(target: "sync", "New peer {} (protocol: {}, network: {:?}, difficulty: {:?}, latest:{}, genesis:{})", peer_id, peer.protocol_version, peer.network_id, peer.difficulty, peer.latest_hash, peer.genesis);
+		if io.is_expired() {
+			trace!("Status packet from expired session {}:{}", peer_id, io.peer_info(peer_id));
+			return Ok(());
+		}
 
 		if self.peers.contains_key(&peer_id) {
 			warn!("Unexpected status packet from {}:{}", peer_id, io.peer_info(peer_id));

sync/src/io.rs

@@ -41,6 +41,8 @@ pub trait SyncIo {
 	fn is_chain_queue_empty(&self) -> bool {
 		self.chain().queue_info().is_empty()
 	}
+	/// Check if the session is expired
+	fn is_expired(&self) -> bool;
 }
 
 /// Wraps `NetworkContext` and the blockchain client
@@ -83,6 +85,10 @@ impl<'s, 'h> SyncIo for NetSyncIo<'s, 'h> {
 	fn peer_info(&self, peer_id: PeerId) -> String {
 		self.network.peer_info(peer_id)
 	}
+
+	fn is_expired(&self) -> bool {
+		self.network.is_expired()
+	}
 }
 
 

sync/src/lib.rs

@@ -41,11 +41,13 @@
 //! use ethcore::miner::Miner;
 //!
 //! fn main() {
-//! 	let mut service = NetworkService::start(NetworkConfiguration::new()).unwrap();
+//! 	let mut service = NetworkService::new(NetworkConfiguration::new()).unwrap();
+//! 	service.start().unwrap();
 //! 	let dir = env::temp_dir();
 //! 	let client = Client::new(ClientConfig::default(), ethereum::new_frontier(), &dir, Arc::new(Miner::default()), service.io().channel()).unwrap();
 //! 	let miner = Miner::new(false, ethereum::new_frontier());
-//! 	EthSync::register(&mut service, SyncConfig::default(), client);
+//! 	let sync = EthSync::new(SyncConfig::default(), client);
+//! 	EthSync::register(&mut service, sync);
 //! }
 //! ```
 
@@ -66,8 +68,10 @@ use util::network::{NetworkProtocolHandler, NetworkService, NetworkContext, Peer
 use util::TimerToken;
 use util::{U256, ONE_U256};
 use ethcore::client::Client;
-use ethcore::service::SyncMessage;
+use ethcore::service::{SyncMessage, NetSyncMessage};
 use io::NetSyncIo;
+use util::io::IoChannel;
+use util::{NetworkIoMessage, NetworkError};
 use chain::ChainSync;
 
 mod chain;
@@ -98,30 +102,41 @@ impl Default for SyncConfig {
 pub trait SyncProvider: Send + Sync {
 	/// Get sync status
 	fn status(&self) -> SyncStatus;
+	/// Start the network
+	fn start_network(&self);
+	/// Stop the network
+	fn stop_network(&self);
 }
 
 /// Ethereum network protocol handler
 pub struct EthSync {
 	/// Shared blockchain client. TODO: this should evetually become an IPC endpoint
 	chain: Arc<Client>,
 	/// Sync strategy
-	sync: RwLock<ChainSync>
+	sync: RwLock<ChainSync>,
+	/// IO communication chnnel.
+	io_channel: RwLock<IoChannel<NetSyncMessage>>,
 }
 
 pub use self::chain::{SyncStatus, SyncState};
 
 impl EthSync {
 	/// Creates and register protocol with the network service
-	pub fn register(service: &mut NetworkService<SyncMessage>, config: SyncConfig, chain: Arc<Client>) -> Arc<EthSync> {
+	pub fn new(config: SyncConfig, chain: Arc<Client>) -> Arc<EthSync> {
 		let sync = ChainSync::new(config, chain.deref());
 		let sync = Arc::new(EthSync {
 			chain: chain,
 			sync: RwLock::new(sync),
+			io_channel: RwLock::new(IoChannel::disconnected()),
 		});
-		service.register_protocol(sync.clone(), "eth", &[62u8, 63u8]).expect("Error registering eth protocol handler");
 		sync
 	}
 
+	/// Register protocol with the network service
+	pub fn register(service: &NetworkService<SyncMessage>, sync: Arc<EthSync>) -> Result<(), NetworkError> {
+		service.register_protocol(sync.clone(), "eth", &[62u8, 63u8])
+	}
+
 	/// Stop sync
 	pub fn stop(&mut self, io: &mut NetworkContext<SyncMessage>) {
 		self.sync.write().unwrap().abort(&mut NetSyncIo::new(io, self.chain.deref()));
@@ -138,11 +153,20 @@ impl SyncProvider for EthSync {
 	fn status(&self) -> SyncStatus {
 		self.sync.read().unwrap().status()
 	}
+
+	fn start_network(&self) {
+		self.io_channel.read().unwrap().send(NetworkIoMessage::User(SyncMessage::StartNetwork)).expect("Error sending IO notification");
+	}
+
+	fn stop_network(&self) {
+		self.io_channel.read().unwrap().send(NetworkIoMessage::User(SyncMessage::StopNetwork)).expect("Error sending IO notification");
+	}
 }
 
 impl NetworkProtocolHandler<SyncMessage> for EthSync {
 	fn initialize(&self, io: &NetworkContext<SyncMessage>) {
 		io.register_timer(0, 1000).expect("Error registering sync timer");
+		*self.io_channel.write().unwrap() = io.io_channel();
 	}
 
 	fn read(&self, io: &NetworkContext<SyncMessage>, peer: &PeerId, packet_id: u8, data: &[u8]) {

sync/src/tests/chain.rs

@@ -192,3 +192,13 @@ fn restart_on_broken_chain() {
 
 	assert_eq!(net.peer(0).chain.chain_info().best_block_number, 5);
 }
+
+#[test]
+fn high_td_attach() {
+	let mut net = TestNet::new(2);
+	net.peer_mut(1).chain.add_blocks(10, EachBlockWith::Uncle);
+	net.peer_mut(1).chain.corrupt_block_parent(6);
+	net.sync_steps(20);
+
+	assert_eq!(net.peer(0).chain.chain_info().best_block_number, 5);
+}

sync/src/tests/helpers.rs

@@ -43,6 +43,10 @@ impl<'p> SyncIo for TestIo<'p> {
 	fn disconnect_peer(&mut self, _peer_id: PeerId) {
 	}
 
+	fn is_expired(&self) -> bool {
+		false
+	}
+
 	fn respond(&mut self, packet_id: PacketId, data: Vec<u8>) -> Result<(), UtilError> {
 		self.queue.push_back(TestPacket {
 			data: data,

util/src/io/mod.rs

@@ -142,7 +142,7 @@ mod tests {
 
 	#[test]
 	fn test_service_register_handler () {
-		let mut service = IoService::<MyMessage>::start().expect("Error creating network service");
+		let service = IoService::<MyMessage>::start().expect("Error creating network service");
 		service.register_handler(Arc::new(MyHandler)).unwrap();
 	}