grassrootseconomics
/
openethereum
5
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
openethereum/util/src/network/host.rs

838 lines
28 KiB
Rust
Raw Blame History

// Copyright 2015, 2016 Ethcore (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 <http://www.gnu.org/licenses/>.
use std::net::{SocketAddr, SocketAddrV4};
use std::collections::{HashMap};
use std::hash::{Hasher};
use std::str::{FromStr};
use std::sync::*;
use std::ops::*;
use mio::*;
use mio::tcp::*;
use mio::udp::*;
use target_info::Target;
use hash::*;
use crypto::*;
use sha3::Hashable;
use rlp::*;
use network::handshake::Handshake;
use network::session::{Session, SessionData};
use error::*;
use io::*;
use network::NetworkProtocolHandler;
use network::node::*;
use network::stats::NetworkStats;
use network::error::DisconnectReason;
use igd::{PortMappingProtocol,search_gateway};
type Slab<T> = ::slab::Slab<T, usize>;
const _DEFAULT_PORT: u16 = 30304;
const MAX_CONNECTIONS: usize = 1024;
const IDEAL_PEERS: u32 = 10;
const MAINTENANCE_TIMEOUT: u64 = 1000;
#[derive(Debug)]
/// Network service configuration
pub struct NetworkConfiguration {
/// IP address to listen for incoming connections
pub listen_address: SocketAddr,
/// IP address to advertise
pub public_address: SocketAddr,
/// Enable NAT configuration
pub nat_enabled: bool,
/// Enable discovery
pub discovery_enabled: bool,
/// Pin to boot nodes only
pub pin: bool,
/// List of initial node addresses
pub boot_nodes: Vec<String>,
/// Use provided node key instead of default
pub use_secret: Option<Secret>,
}
impl NetworkConfiguration {
/// Create a new instance of default settings.
pub fn new() -> NetworkConfiguration {
NetworkConfiguration {
listen_address: SocketAddr::from_str("0.0.0.0:30304").unwrap(),
public_address: SocketAddr::from_str("0.0.0.0:30304").unwrap(),
nat_enabled: true,
discovery_enabled: true,
pin: false,
boot_nodes: Vec::new(),
use_secret: None,
}
}
/// Create new default configuration with sepcified listen port.
pub fn new_with_port(port: u16) -> NetworkConfiguration {
let mut config = NetworkConfiguration::new();
config.listen_address = SocketAddr::from_str(&format!("0.0.0.0:{}", port)).unwrap();
config.public_address = SocketAddr::from_str(&format!("0.0.0.0:{}", port)).unwrap();
config
}
/// Conduct NAT if needed.
pub fn prepared(self) -> Self {
let mut listen = self.listen_address;
let mut public = self.public_address;
if self.nat_enabled {
info!("Enabling NAT...");
match search_gateway() {
Err(ref err) => info!("Error: {}", err),
Ok(gateway) => {
let int_addr = SocketAddrV4::from_str("127.0.0.1:30304").unwrap();
match gateway.get_any_address(PortMappingProtocol::TCP, int_addr, 0, "Parity Node/TCP") {
Err(ref err) => {
info!("There was an error! {}", err);
},
Ok(ext_addr) => {
info!("Local gateway: {}, External ip address: {}", gateway, ext_addr);
public = SocketAddr::V4(ext_addr);
listen = SocketAddr::V4(int_addr);
},
}
},
}
}
NetworkConfiguration {
listen_address: listen,
public_address: public,
nat_enabled: false,
discovery_enabled: self.discovery_enabled,
pin: self.pin,
boot_nodes: self.boot_nodes,
use_secret: self.use_secret,
}
}
}
// Tokens
//const TOKEN_BEGIN: usize = USER_TOKEN_START; // TODO: ICE in rustc 1.7.0-nightly (49c382779 2016-01-12)
const TOKEN_BEGIN: usize = 32;
const TCP_ACCEPT: usize = TOKEN_BEGIN + 1;
const IDLE: usize = TOKEN_BEGIN + 2;
const NODETABLE_RECEIVE: usize = TOKEN_BEGIN + 3;
const NODETABLE_MAINTAIN: usize = TOKEN_BEGIN + 4;
const NODETABLE_DISCOVERY: usize = TOKEN_BEGIN + 5;
const FIRST_CONNECTION: usize = TOKEN_BEGIN + 16;
const LAST_CONNECTION: usize = FIRST_CONNECTION + MAX_CONNECTIONS - 1;
/// Protocol handler level packet id
pub type PacketId = u8;
/// Protocol / handler id
pub type ProtocolId = &'static str;
/// Messages used to communitate with the event loop from other threads.
#[derive(Clone)]
pub enum NetworkIoMessage<Message> where Message: Send + Sync + Clone {
/// Register a new protocol handler.
AddHandler {
/// Handler shared instance.
handler: Arc<NetworkProtocolHandler<Message> + Sync>,
/// Protocol Id.
protocol: ProtocolId,
/// Supported protocol versions.
versions: Vec<u8>,
},
/// Register a new protocol timer
AddTimer {
/// Protocol Id.
protocol: ProtocolId,
/// Timer token.
token: TimerToken,
/// Timer delay in milliseconds.
delay: u64,
},
/// Disconnect a peer
Disconnect(PeerId),
/// User message
User(Message),
}
/// Local (temporary) peer session ID.
pub type PeerId = usize;
#[derive(Debug, PartialEq, Eq)]
/// Protocol info
pub struct CapabilityInfo {
pub protocol: ProtocolId,
pub version: u8,
/// Total number of packet IDs this protocol support.
pub packet_count: u8,
}
impl Encodable for CapabilityInfo {
fn rlp_append(&self, s: &mut RlpStream) {
s.begin_list(2);
s.append(&self.protocol);
s.append(&self.version);
}
}
/// IO access point. This is passed to all IO handlers and provides an interface to the IO subsystem.
pub struct NetworkContext<'s, Message> where Message: Send + Sync + Clone + 'static, 's {
io: &'s IoContext<NetworkIoMessage<Message>>,
protocol: ProtocolId,
connections: Arc<RwLock<Slab<SharedConnectionEntry>>>,
session: Option<StreamToken>,
}
impl<'s, Message> NetworkContext<'s, Message> where Message: Send + Sync + Clone + 'static, {
/// Create a new network IO access point. Takes references to all the data that can be updated within the IO handler.
fn new(io: &'s IoContext<NetworkIoMessage<Message>>,
protocol: ProtocolId,
session: Option<StreamToken>, connections: Arc<RwLock<Slab<SharedConnectionEntry>>>) -> NetworkContext<'s, Message> {
NetworkContext {
io: io,
protocol: protocol,
session: session,
connections: connections,
}
}
/// Send a packet over the network to another peer.
pub fn send(&self, peer: PeerId, packet_id: PacketId, data: Vec<u8>) -> Result<(), UtilError> {
if let Some(connection) = self.connections.read().unwrap().get(peer).cloned() {
match *connection.lock().unwrap().deref_mut() {
ConnectionEntry::Session(ref mut s) => {
s.send_packet(self.protocol, packet_id as u8, &data).unwrap_or_else(|e| {
warn!(target: "net", "Send error: {:?}", e);
}); //TODO: don't copy vector data
try!(self.io.update_registration(peer));
},
_ => warn!(target: "net", "Send: Peer is not connected yet")
}
} else {
warn!(target: "net", "Send: Peer does not exist")
}
Ok(())
}
/// Respond to a current network message. Panics if no there is no packet in the context.
pub fn respond(&self, packet_id: PacketId, data: Vec<u8>) -> Result<(), UtilError> {
match self.session {
Some(session) => self.send(session, packet_id, data),
None => {
panic!("Respond: Session does not exist")
}
}
}
/// Disable current protocol capability for given peer. If no capabilities left peer gets disconnected.
pub fn disable_peer(&self, peer: PeerId) {
//TODO: remove capability, disconnect if no capabilities left
self.disconnect_peer(peer);
}
/// Disconnect peer. Reconnect can be attempted later.
pub fn disconnect_peer(&self, peer: PeerId) {
self.io.message(NetworkIoMessage::Disconnect(peer));
}
/// Register a new IO timer. 'IoHandler::timeout' will be called with the token.
pub fn register_timer(&self, token: TimerToken, ms: u64) -> Result<(), UtilError> {
self.io.message(NetworkIoMessage::AddTimer {
token: token,
delay: ms,
protocol: self.protocol,
});
Ok(())
}
/// Returns peer identification string
pub fn peer_info(&self, peer: PeerId) -> String {
if let Some(connection) = self.connections.read().unwrap().get(peer).cloned() {
if let ConnectionEntry::Session(ref s) = *connection.lock().unwrap().deref() {
return s.info.client_version.clone()
}
}
"unknown".to_owned()
}
}
/// Shared host information
pub struct HostInfo {
/// Our private and public keys.
keys: KeyPair,
/// Current network configuration
config: NetworkConfiguration,
/// Connection nonce.
nonce: H256,
/// RLPx protocol version
pub protocol_version: u32,
/// Client identifier
pub client_version: String,
/// TCP connection port.
pub listen_port: u16,
/// Registered capabilities (handlers)
pub capabilities: Vec<CapabilityInfo>
}
impl HostInfo {
/// Returns public key
pub fn id(&self) -> &NodeId {
self.keys.public()
}
/// Returns secret key
pub fn secret(&self) -> &Secret {
self.keys.secret()
}
/// Increments and returns connection nonce.
pub fn next_nonce(&mut self) -> H256 {
self.nonce = self.nonce.sha3();
self.nonce.clone()
}
}
enum ConnectionEntry {
Handshake(Handshake),
Session(Session)
}
type SharedConnectionEntry = Arc<Mutex<ConnectionEntry>>;
#[derive(Copy, Clone)]
struct ProtocolTimer {
pub protocol: ProtocolId,
pub token: TimerToken, // Handler level token
}
/// Root IO handler. Manages protocol handlers, IO timers and network connections.
pub struct Host<Message> where Message: Send + Sync + Clone {
pub info: RwLock<HostInfo>,
udp_socket: Mutex<UdpSocket>,
tcp_listener: Mutex<TcpListener>,
connections: Arc<RwLock<Slab<SharedConnectionEntry>>>,
nodes: RwLock<HashMap<NodeId, Node>>,
handlers: RwLock<HashMap<ProtocolId, Arc<NetworkProtocolHandler<Message>>>>,
timers: RwLock<HashMap<TimerToken, ProtocolTimer>>,
timer_counter: RwLock<usize>,
stats: Arc<NetworkStats>,
}
impl<Message> Host<Message> where Message: Send + Sync + Clone {
/// Create a new instance
pub fn new(config: NetworkConfiguration) -> Host<Message> {
let config = config.prepared();
let addr = config.listen_address;
// Setup the server socket
let tcp_listener = TcpListener::bind(&addr).unwrap();
let udp_socket = UdpSocket::bound(&addr).unwrap();
let mut host = Host::<Message> {
info: RwLock::new(HostInfo {
keys: if let Some(ref secret) = config.use_secret { KeyPair::from_secret(secret.clone()).unwrap() } else { KeyPair::create().unwrap() },
config: config,
nonce: H256::random(),
protocol_version: 4,
client_version: format!("Parity/{}/{}-{}-{}", env!("CARGO_PKG_VERSION"), Target::arch(), Target::env(), Target::os()),
listen_port: 0,
capabilities: Vec::new(),
}),
udp_socket: Mutex::new(udp_socket),
tcp_listener: Mutex::new(tcp_listener),
connections: Arc::new(RwLock::new(Slab::new_starting_at(FIRST_CONNECTION, MAX_CONNECTIONS))),
nodes: RwLock::new(HashMap::new()),
handlers: RwLock::new(HashMap::new()),
timers: RwLock::new(HashMap::new()),
timer_counter: RwLock::new(LAST_CONNECTION + 1),
stats: Arc::new(NetworkStats::default()),
};
let port = host.info.read().unwrap().config.listen_address.port();
host.info.write().unwrap().deref_mut().listen_port = port;
/*
match ::ifaces::Interface::get_all().unwrap().into_iter().filter(|x| x.kind == ::ifaces::Kind::Packet && x.addr.is_some()).next() {
Some(iface) => config.public_address = iface.addr.unwrap(),
None => warn!("No public network interface"),
*/
let boot_nodes = host.info.read().unwrap().config.boot_nodes.clone();
for n in boot_nodes {
host.add_node(&n);
}
host
}
pub fn stats(&self) -> Arc<NetworkStats> {
self.stats.clone()
}
pub fn add_node(&mut self, id: &str) {
match Node::from_str(id) {
Err(e) => { warn!("Could not add node: {:?}", e); },
Ok(n) => {
self.nodes.write().unwrap().insert(n.id.clone(), n);
}
}
}
pub fn client_version(&self) -> String {
self.info.read().unwrap().client_version.clone()
}
pub fn client_id(&self) -> NodeId {
self.info.read().unwrap().id().clone()
}
fn maintain_network(&self, io: &IoContext<NetworkIoMessage<Message>>) {
self.keep_alive(io);
self.connect_peers(io);
}
fn have_session(&self, id: &NodeId) -> bool {
self.connections.read().unwrap().iter().any(|e| match *e.lock().unwrap().deref() { ConnectionEntry::Session(ref s) => s.info.id.eq(&id), _ => false })
}
fn connecting_to(&self, id: &NodeId) -> bool {
self.connections.read().unwrap().iter().any(|e| match *e.lock().unwrap().deref() { ConnectionEntry::Handshake(ref h) => h.id.eq(&id), _ => false })
}
fn keep_alive(&self, io: &IoContext<NetworkIoMessage<Message>>) {
let mut to_kill = Vec::new();
for e in self.connections.write().unwrap().iter_mut() {
if let ConnectionEntry::Session(ref mut s) = *e.lock().unwrap().deref_mut() {
if !s.keep_alive(io) {
s.disconnect(DisconnectReason::PingTimeout);
to_kill.push(s.token());
}
}
}
for p in to_kill {
self.kill_connection(p, io);
}
}
fn connect_peers(&self, io: &IoContext<NetworkIoMessage<Message>>) {
struct NodeInfo {
id: NodeId,
peer_type: PeerType
}
let mut to_connect: Vec<NodeInfo> = Vec::new();
let mut req_conn = 0;
//TODO: use nodes from discovery here
//for n in self.node_buckets.iter().flat_map(|n| &n.nodes).map(|id| NodeInfo { id: id.clone(), peer_type: self.nodes.get(id).unwrap().peer_type}) {
let pin = self.info.read().unwrap().deref().config.pin;
for n in self.nodes.read().unwrap().values().map(|n| NodeInfo { id: n.id.clone(), peer_type: n.peer_type }) {
let connected = self.have_session(&n.id) || self.connecting_to(&n.id);
let required = n.peer_type == PeerType::Required;
if connected && required {
req_conn += 1;
}
else if !connected && (!pin || required) {
to_connect.push(n);
}
}
for n in &to_connect {
if n.peer_type == PeerType::Required {
if req_conn < IDEAL_PEERS {
self.connect_peer(&n.id, io);
}
req_conn += 1;
}
}
if !pin {
let pending_count = 0; //TODO:
let peer_count = 0;
let mut open_slots = IDEAL_PEERS - peer_count - pending_count + req_conn;
if open_slots > 0 {
for n in &to_connect {
if n.peer_type == PeerType::Optional && open_slots > 0 {
open_slots -= 1;
self.connect_peer(&n.id, io);
}
}
}
}
}
#[cfg_attr(feature="dev", allow(single_match))]
fn connect_peer(&self, id: &NodeId, io: &IoContext<NetworkIoMessage<Message>>) {
if self.have_session(id)
{
warn!("Aborted connect. Node already connected.");
return;
}
if self.connecting_to(id) {
warn!("Aborted connect. Node already connecting.");
return;
}
let socket = {
let address = {
let mut nodes = self.nodes.write().unwrap();
let node = nodes.get_mut(id).unwrap();
node.last_attempted = Some(::time::now());
node.endpoint.address
};
match TcpStream::connect(&address) {
Ok(socket) => socket,
Err(_) => {
warn!("Cannot connect to node");
return;
}
}
};
self.create_connection(socket, Some(id), io);
}
#[cfg_attr(feature="dev", allow(block_in_if_condition_stmt))]
fn create_connection(&self, socket: TcpStream, id: Option<&NodeId>, io: &IoContext<NetworkIoMessage<Message>>) {
let nonce = self.info.write().unwrap().next_nonce();
let mut connections = self.connections.write().unwrap();
if connections.insert_with(|token| {
let mut handshake = Handshake::new(token, id, socket, &nonce, self.stats.clone()).expect("Can't create handshake");
handshake.start(io, &self.info.read().unwrap(), id.is_some()).and_then(|_| io.register_stream(token)).unwrap_or_else (|e| {
debug!(target: "net", "Handshake create error: {:?}", e);
});
Arc::new(Mutex::new(ConnectionEntry::Handshake(handshake)))
}).is_none() {
warn!("Max connections reached");
}
}
fn accept(&self, io: &IoContext<NetworkIoMessage<Message>>) {
trace!(target: "net", "accept");
loop {
let socket = match self.tcp_listener.lock().unwrap().accept() {
Ok(None) => break,
Ok(Some((sock, _addr))) => sock,
Err(e) => {
warn!("Error accepting connection: {:?}", e);
break
},
};
self.create_connection(socket, None, io);
}
io.update_registration(TCP_ACCEPT).expect("Error registering TCP listener");
}
#[cfg_attr(feature="dev", allow(single_match))]
fn connection_writable(&self, token: StreamToken, io: &IoContext<NetworkIoMessage<Message>>) {
let mut create_session = false;
let mut kill = false;
if let Some(connection) = self.connections.read().unwrap().get(token).cloned() {
match *connection.lock().unwrap().deref_mut() {
ConnectionEntry::Handshake(ref mut h) => {
match h.writable(io, &self.info.read().unwrap()) {
Err(e) => {
debug!(target: "net", "Handshake write error: {:?}", e);
kill = true;
},
Ok(_) => ()
}
if h.done() {
create_session = true;
}
},
ConnectionEntry::Session(ref mut s) => {
match s.writable(io, &self.info.read().unwrap()) {
Err(e) => {
debug!(target: "net", "Session write error: {:?}", e);
kill = true;
},
Ok(_) => ()
}
io.update_registration(token).unwrap_or_else(|e| debug!(target: "net", "Session registration error: {:?}", e));
}
}
}
if kill {
self.kill_connection(token, io); //TODO: mark connection as dead an check in kill_connection
return;
} else if create_session {
self.start_session(token, io);
io.update_registration(token).unwrap_or_else(|e| debug!(target: "net", "Session registration error: {:?}", e));
}
}
fn connection_closed(&self, token: TimerToken, io: &IoContext<NetworkIoMessage<Message>>) {
self.kill_connection(token, io);
}
fn connection_readable(&self, token: StreamToken, io: &IoContext<NetworkIoMessage<Message>>) {
let mut ready_data: Vec<ProtocolId> = Vec::new();
let mut packet_data: Option<(ProtocolId, PacketId, Vec<u8>)> = None;
let mut create_session = false;
let mut kill = false;
if let Some(connection) = self.connections.read().unwrap().get(token).cloned() {
match *connection.lock().unwrap().deref_mut() {
ConnectionEntry::Handshake(ref mut h) => {
if let Err(e) = h.readable(io, &self.info.read().unwrap()) {
debug!(target: "net", "Handshake read error: {:?}", e);
kill = true;
}
if h.done() {
create_session = true;
}
},
ConnectionEntry::Session(ref mut s) => {
match s.readable(io, &self.info.read().unwrap()) {
Err(e) => {
debug!(target: "net", "Handshake read error: {:?}", e);
kill = true;
},
Ok(SessionData::Ready) => {
for (p, _) in self.handlers.read().unwrap().iter() {
if s.have_capability(p) {
ready_data.push(p);
}
}
},
Ok(SessionData::Packet {
data,
protocol,
packet_id,
}) => {
match self.handlers.read().unwrap().get(protocol) {
None => { warn!(target: "net", "No handler found for protocol: {:?}", protocol) },
Some(_) => packet_data = Some((protocol, packet_id, data)),
}
},
Ok(SessionData::None) => {},
}
}
}
}
if kill {
self.kill_connection(token, io); //TODO: mark connection as dead an check in kill_connection
return;
} else if create_session {
self.start_session(token, io);
io.update_registration(token).unwrap_or_else(|e| debug!(target: "net", "Session registration error: {:?}", e));
}
for p in ready_data {
let h = self.handlers.read().unwrap().get(p).unwrap().clone();
h.connected(&NetworkContext::new(io, p, Some(token), self.connections.clone()), &token);
}
if let Some((p, packet_id, data)) = packet_data {
let h = self.handlers.read().unwrap().get(p).unwrap().clone();
h.read(&NetworkContext::new(io, p, Some(token), self.connections.clone()), &token, packet_id, &data[1..]);
}
io.update_registration(token).unwrap_or_else(|e| debug!(target: "net", "Token registration error: {:?}", e));
}
fn start_session(&self, token: StreamToken, io: &IoContext<NetworkIoMessage<Message>>) {
let mut connections = self.connections.write().unwrap();
if connections.get(token).is_none() {
return; // handshake expired
}
connections.replace_with(token, |c| {
match Arc::try_unwrap(c).ok().unwrap().into_inner().unwrap() {
ConnectionEntry::Handshake(h) => {
let session = Session::new(h, io, &self.info.read().unwrap()).expect("Session creation error");
io.update_registration(token).expect("Error updating session registration");
self.stats.inc_sessions();
Some(Arc::new(Mutex::new(ConnectionEntry::Session(session))))
},
_ => { None } // handshake expired
}
}).ok();
}
fn connection_timeout(&self, token: StreamToken, io: &IoContext<NetworkIoMessage<Message>>) {
self.kill_connection(token, io)
}
fn kill_connection(&self, token: StreamToken, io: &IoContext<NetworkIoMessage<Message>>) {
let mut to_disconnect: Vec<ProtocolId> = Vec::new();
{
let mut connections = self.connections.write().unwrap();
if let Some(connection) = connections.get(token).cloned() {
match *connection.lock().unwrap().deref_mut() {
ConnectionEntry::Handshake(_) => {
connections.remove(token);
},
ConnectionEntry::Session(ref mut s) if s.is_ready() => {
for (p, _) in self.handlers.read().unwrap().iter() {
if s.have_capability(p) {
to_disconnect.push(p);
}
}
connections.remove(token);
},
_ => {},
}
}
io.deregister_stream(token).expect("Error deregistering stream");
}
for p in to_disconnect {
let h = self.handlers.read().unwrap().get(p).unwrap().clone();
h.disconnected(&NetworkContext::new(io, p, Some(token), self.connections.clone()), &token);
}
}
}
impl<Message> IoHandler<NetworkIoMessage<Message>> for Host<Message> where Message: Send + Sync + Clone + 'static {
/// Initialize networking
fn initialize(&self, io: &IoContext<NetworkIoMessage<Message>>) {
io.register_stream(TCP_ACCEPT).expect("Error registering TCP listener");
io.register_stream(NODETABLE_RECEIVE).expect("Error registering UDP listener");
io.register_timer(IDLE, MAINTENANCE_TIMEOUT).expect("Error registering Network idle timer");
//io.register_timer(NODETABLE_MAINTAIN, 7200);
}
fn stream_hup(&self, io: &IoContext<NetworkIoMessage<Message>>, stream: StreamToken) {
trace!(target: "net", "Hup: {}", stream);
match stream {
FIRST_CONNECTION ... LAST_CONNECTION => self.connection_closed(stream, io),
_ => warn!(target: "net", "Unexpected hup"),
};
}
fn stream_readable(&self, io: &IoContext<NetworkIoMessage<Message>>, stream: StreamToken) {
match stream {
FIRST_CONNECTION ... LAST_CONNECTION => self.connection_readable(stream, io),
NODETABLE_RECEIVE => {},
TCP_ACCEPT => self.accept(io),
_ => panic!("Received unknown readable token"),
}
}
fn stream_writable(&self, io: &IoContext<NetworkIoMessage<Message>>, stream: StreamToken) {
match stream {
FIRST_CONNECTION ... LAST_CONNECTION => self.connection_writable(stream, io),
NODETABLE_RECEIVE => {},
_ => panic!("Received unknown writable token"),
}
}
fn timeout(&self, io: &IoContext<NetworkIoMessage<Message>>, token: TimerToken) {
match token {
IDLE => self.maintain_network(io),
FIRST_CONNECTION ... LAST_CONNECTION => self.connection_timeout(token, io),
NODETABLE_DISCOVERY => {},
NODETABLE_MAINTAIN => {},
_ => match self.timers.read().unwrap().get(&token).cloned() {
Some(timer) => match self.handlers.read().unwrap().get(timer.protocol).cloned() {
None => { warn!(target: "net", "No handler found for protocol: {:?}", timer.protocol) },
Some(h) => { h.timeout(&NetworkContext::new(io, timer.protocol, None, self.connections.clone()), timer.token); }
},
None => { warn!("Unknown timer token: {}", token); } // timer is not registerd through us
}
}
}
fn message(&self, io: &IoContext<NetworkIoMessage<Message>>, message: &NetworkIoMessage<Message>) {
match *message {
NetworkIoMessage::AddHandler {
ref handler,
ref protocol,
ref versions
} => {
let h = handler.clone();
h.initialize(&NetworkContext::new(io, protocol, None, self.connections.clone()));
self.handlers.write().unwrap().insert(protocol, h);
let mut info = self.info.write().unwrap();
for v in versions {
info.capabilities.push(CapabilityInfo { protocol: protocol, version: *v, packet_count:0 });
}
},
NetworkIoMessage::AddTimer {
ref protocol,
ref delay,
ref token,
} => {
let handler_token = {
let mut timer_counter = self.timer_counter.write().unwrap();
let counter = timer_counter.deref_mut();
let handler_token = *counter;
*counter += 1;
handler_token
};
self.timers.write().unwrap().insert(handler_token, ProtocolTimer { protocol: protocol, token: *token });
io.register_timer(handler_token, *delay).expect("Error registering timer");
},
NetworkIoMessage::Disconnect(ref peer) => {
if let Some(connection) = self.connections.read().unwrap().get(*peer).cloned() {
match *connection.lock().unwrap().deref_mut() {
ConnectionEntry::Handshake(_) => {},
ConnectionEntry::Session(ref mut s) => { s.disconnect(DisconnectReason::DisconnectRequested); }
}
}
self.kill_connection(*peer, io);
},
NetworkIoMessage::User(ref message) => {
for (p, h) in self.handlers.read().unwrap().iter() {
h.message(&NetworkContext::new(io, p, None, self.connections.clone()), &message);
}
}
}
}
fn register_stream(&self, stream: StreamToken, reg: Token, event_loop: &mut EventLoop<IoManager<NetworkIoMessage<Message>>>) {
match stream {
FIRST_CONNECTION ... LAST_CONNECTION => {
if let Some(connection) = self.connections.read().unwrap().get(stream).cloned() {
match *connection.lock().unwrap().deref() {
ConnectionEntry::Handshake(ref h) => h.register_socket(reg, event_loop).expect("Error registering socket"),
ConnectionEntry::Session(_) => warn!("Unexpected session stream registration")
}
} else {} // expired
}
NODETABLE_RECEIVE => event_loop.register(self.udp_socket.lock().unwrap().deref(), Token(NODETABLE_RECEIVE), EventSet::all(), PollOpt::edge()).expect("Error registering stream"),
TCP_ACCEPT => event_loop.register(self.tcp_listener.lock().unwrap().deref(), Token(TCP_ACCEPT), EventSet::all(), PollOpt::edge()).expect("Error registering stream"),
_ => warn!("Unexpected stream registration")
}
}
fn deregister_stream(&self, stream: StreamToken, event_loop: &mut EventLoop<IoManager<NetworkIoMessage<Message>>>) {
match stream {
FIRST_CONNECTION ... LAST_CONNECTION => {
let mut connections = self.connections.write().unwrap();
if let Some(connection) = connections.get(stream).cloned() {
match *connection.lock().unwrap().deref() {
ConnectionEntry::Handshake(ref h) => h.deregister_socket(event_loop).expect("Error deregistering socket"),
ConnectionEntry::Session(ref s) => s.deregister_socket(event_loop).expect("Error deregistering session socket"),
}
connections.remove(stream);
}
},
NODETABLE_RECEIVE => event_loop.deregister(self.udp_socket.lock().unwrap().deref()).unwrap(),
TCP_ACCEPT => event_loop.deregister(self.tcp_listener.lock().unwrap().deref()).unwrap(),
_ => warn!("Unexpected stream deregistration")
}
}
fn update_stream(&self, stream: StreamToken, reg: Token, event_loop: &mut EventLoop<IoManager<NetworkIoMessage<Message>>>) {
match stream {
FIRST_CONNECTION ... LAST_CONNECTION => {
if let Some(connection) = self.connections.read().unwrap().get(stream).cloned() {
match *connection.lock().unwrap().deref() {
ConnectionEntry::Handshake(ref h) => h.update_socket(reg, event_loop).expect("Error updating socket"),
ConnectionEntry::Session(ref s) => s.update_socket(reg, event_loop).expect("Error updating socket"),
}
} else {} // expired
}
NODETABLE_RECEIVE => event_loop.reregister(self.udp_socket.lock().unwrap().deref(), Token(NODETABLE_RECEIVE), EventSet::all(), PollOpt::edge()).expect("Error reregistering stream"),
TCP_ACCEPT => event_loop.reregister(self.tcp_listener.lock().unwrap().deref(), Token(TCP_ACCEPT), EventSet::all(), PollOpt::edge()).expect("Error reregistering stream"),
_ => warn!("Unexpected stream update")
}
}
}
Reference in New Issue View Git Blame Copy Permalink