319 lines
10 KiB
Rust
319 lines
10 KiB
Rust
pub mod handle;
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pub mod thread;
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use std::os::unix::net::UnixListener;
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use std::path::PathBuf;
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use std::sync::{Arc, Mutex};
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use std::{fs, io, net, time};
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use crossbeam_channel as chan;
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use cyphernet::Ecdh;
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use netservices::resource::NetAccept;
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use radicle_fetch::FetchLimit;
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use reactor::poller::popol;
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use reactor::Reactor;
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use thiserror::Error;
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use radicle::git;
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use radicle::node;
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use radicle::node::address;
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use radicle::node::address::Store as _;
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use radicle::node::Handle as _;
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use radicle::node::{ADDRESS_DB_FILE, NODE_ANNOUNCEMENT_FILE, ROUTING_DB_FILE, TRACKING_DB_FILE};
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use radicle::profile::Home;
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use radicle::Storage;
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use crate::control;
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use crate::crypto::Signer;
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use crate::node::{routing, NodeId};
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use crate::service::message::NodeAnnouncement;
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use crate::service::{gossip, tracking, Event};
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use crate::wire::Wire;
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use crate::wire::{self, Decode};
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use crate::worker;
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use crate::{service, LocalTime};
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pub use handle::Error as HandleError;
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pub use handle::Handle;
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/// A client error.
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#[derive(Error, Debug)]
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pub enum Error {
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/// A routing database error.
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#[error("routing database error: {0}")]
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Routing(#[from] routing::Error),
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/// An address database error.
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#[error("address database error: {0}")]
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Addresses(#[from] address::Error),
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/// A tracking database error.
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#[error("tracking database error: {0}")]
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Tracking(#[from] tracking::Error),
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/// A gossip database error.
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#[error("gossip database error: {0}")]
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Gossip(#[from] gossip::Error),
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/// An I/O error.
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#[error("i/o error: {0}")]
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Io(#[from] io::Error),
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/// A control socket error.
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#[error("control socket error: {0}")]
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Control(#[from] control::Error),
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/// Another node is already running.
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#[error(
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"another node appears to be running; \
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if this isn't the case, delete the socket file at '{0}' \
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and restart the node"
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)]
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AlreadyRunning(PathBuf),
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/// A git version error.
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#[error("git version error: {0}")]
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GitVersion(#[from] git::VersionError),
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}
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/// Publishes events to subscribers.
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#[derive(Debug, Clone)]
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pub struct Emitter<T> {
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subscribers: Arc<Mutex<Vec<chan::Sender<T>>>>,
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}
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impl<T> Default for Emitter<T> {
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fn default() -> Emitter<T> {
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Emitter {
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subscribers: Default::default(),
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}
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}
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}
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impl<T: Clone> Emitter<T> {
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/// Emit event to subscribers and drop those who can't receive it.
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pub(crate) fn emit(&self, event: T) {
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self.subscribers
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.lock()
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.unwrap()
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.retain(|s| s.try_send(event.clone()).is_ok());
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}
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/// Subscribe to events stream.
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pub fn subscribe(&self) -> chan::Receiver<T> {
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let (sender, receiver) = chan::unbounded();
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let mut subs = self.subscribers.lock().unwrap();
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subs.push(sender);
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receiver
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}
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}
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/// Holds join handles to the client threads, as well as a client handle.
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pub struct Runtime {
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pub id: NodeId,
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pub home: Home,
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pub control: UnixListener,
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pub handle: Handle,
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pub storage: Storage,
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pub reactor: Reactor<wire::Control, popol::Poller>,
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pub pool: worker::Pool,
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pub local_addrs: Vec<net::SocketAddr>,
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pub signals: chan::Receiver<()>,
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}
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impl Runtime {
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/// Initialize the runtime.
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///
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/// This function spawns threads.
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pub fn init<G: Signer + Ecdh + 'static>(
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home: Home,
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config: service::Config,
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listen: Vec<net::SocketAddr>,
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proxy: net::SocketAddr,
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signals: chan::Receiver<()>,
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signer: G,
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) -> Result<Runtime, Error>
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where
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G: Ecdh<Pk = NodeId> + Clone,
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{
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let id = *signer.public_key();
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let alias = config.alias.clone();
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let node_dir = home.node();
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let network = config.network;
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let rng = fastrand::Rng::new();
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let clock = LocalTime::now();
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let storage = Storage::open(home.storage(), git::UserInfo { alias, key: id })?;
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let address_db = node_dir.join(ADDRESS_DB_FILE);
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let routing_db = node_dir.join(ROUTING_DB_FILE);
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let tracking_db = node_dir.join(TRACKING_DB_FILE);
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let scope = config.scope;
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let policy = config.policy;
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log::info!(target: "node", "Opening address book {}..", address_db.display());
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let mut addresses = address::Book::open(address_db.clone())?;
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log::info!(target: "node", "Opening gossip store from {}..", address_db.display());
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let gossip = gossip::Store::open(address_db)?; // Nb. same database as address book.
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log::info!(target: "node", "Opening routing table {}..", routing_db.display());
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let routing = routing::Table::open(routing_db)?;
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log::info!(target: "node", "Opening tracking policy table {}..", tracking_db.display());
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let tracking = tracking::Store::open(tracking_db.clone())?;
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let tracking = tracking::Config::new(policy, scope, tracking);
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log::info!(target: "node", "Default tracking policy set to '{}'", &policy);
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log::info!(target: "node", "Initializing service ({:?})..", network);
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let announcement = if let Some(ann) = fs::read(node_dir.join(NODE_ANNOUNCEMENT_FILE))
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.ok()
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.and_then(|ann| NodeAnnouncement::decode(&mut ann.as_slice()).ok())
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.and_then(|ann| {
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if config.features() == ann.features
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&& config.alias == ann.alias
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&& config.external_addresses == ann.addresses.as_ref()
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{
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Some(ann)
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} else {
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None
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}
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}) {
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log::info!(
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target: "node",
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"Loaded existing node announcement from file (timestamp={}, work={})",
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ann.timestamp,
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ann.work(),
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);
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ann
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} else {
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service::gossip::node(&config, clock.as_millis())
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.solve(Default::default())
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.expect("Runtime::init: unable to solve proof-of-work puzzle")
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};
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if config.connect.is_empty() && addresses.is_empty()? {
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log::info!(target: "node", "Address book is empty. Adding bootstrap nodes..");
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for (alias, addr) in config.network.bootstrap() {
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let (id, addr) = addr.into();
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addresses.insert(
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&id,
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radicle::node::Features::SEED,
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alias,
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0,
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clock.as_millis(),
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[node::KnownAddress::new(addr, address::Source::Bootstrap)],
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)?;
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}
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log::info!(target: "node", "{} nodes added to address book", addresses.len()?);
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}
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let emitter: Emitter<Event> = Default::default();
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let service = service::Service::new(
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config,
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clock,
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routing,
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storage.clone(),
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addresses,
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gossip,
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tracking,
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signer.clone(),
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rng,
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announcement,
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emitter.clone(),
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);
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let (worker_send, worker_recv) = chan::unbounded::<worker::Task>();
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let mut wire = Wire::new(service, worker_send, signer.clone(), proxy, clock);
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let mut local_addrs = Vec::new();
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for addr in listen {
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let listener = NetAccept::bind(&addr)?;
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let local_addr = listener.local_addr();
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local_addrs.push(local_addr);
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wire.listen(listener);
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log::info!(target: "node", "Listening on {local_addr}..");
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}
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let reactor = Reactor::named(wire, popol::Poller::new(), thread::name(&id, "service"))?;
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let handle = Handle::new(home.clone(), reactor.controller(), emitter);
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let atomic = git::version()? >= git::VERSION_REQUIRED;
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if !atomic {
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log::warn!(
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target: "node",
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"Disabling atomic fetches; git version >= {} required", git::VERSION_REQUIRED
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);
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}
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let nid = *signer.public_key();
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let fetch = worker::FetchConfig {
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policy,
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scope,
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tracking_db,
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limit: FetchLimit::default(),
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local: nid,
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expiry: worker::garbage::Expiry::default(),
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};
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let pool = worker::Pool::with(
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worker_recv,
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nid,
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handle.clone(),
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worker::Config {
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capacity: 8,
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timeout: time::Duration::from_secs(9),
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storage: storage.clone(),
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fetch,
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},
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);
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let control = match UnixListener::bind(home.socket()) {
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Ok(sock) => sock,
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Err(err) if err.kind() == io::ErrorKind::AddrInUse => {
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return Err(Error::AlreadyRunning(home.socket()));
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}
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Err(err) => {
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return Err(err.into());
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}
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};
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Ok(Runtime {
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id,
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home,
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control,
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storage,
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reactor,
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handle,
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pool,
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signals,
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local_addrs,
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})
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}
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pub fn run(self) -> Result<(), Error> {
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let home = self.home;
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log::info!(target: "node", "Running node {} in {}..", self.id, home.path().display());
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log::info!(target: "node", "Binding control socket {}..", home.socket().display());
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thread::spawn(&self.id, "control", {
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let handle = self.handle.clone();
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|| control::listen(self.control, handle)
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});
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let _signals = thread::spawn(&self.id, "signals", move || {
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if let Ok(()) = self.signals.recv() {
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log::info!(target: "node", "Termination signal received; shutting down..");
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self.handle.shutdown().ok();
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}
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});
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self.pool.run().unwrap();
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self.reactor.join().unwrap();
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// Nb. We don't join the control thread here, as we have no way of notifying it that the
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// node is shutting down.
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// Remove control socket file, but don't freak out if it's not there anymore.
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fs::remove_file(home.socket()).ok();
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log::debug!(target: "node", "Node shutdown completed for {}", self.id);
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Ok(())
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}
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}
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