927 lines
29 KiB
Rust
927 lines
29 KiB
Rust
pub mod config;
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pub mod filter;
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pub mod message;
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pub mod peer;
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pub mod reactor;
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use std::collections::BTreeMap;
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use std::ops::{Deref, DerefMut};
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use std::{fmt, net, net::IpAddr};
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use crossbeam_channel as chan;
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use fastrand::Rng;
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use log::*;
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use nakamoto::{LocalDuration, LocalTime};
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use nakamoto_net as nakamoto;
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use nakamoto_net::Link;
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use nonempty::NonEmpty;
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use radicle::storage::ReadStorage;
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use crate::address_book;
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use crate::address_book::AddressBook;
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use crate::address_manager::AddressManager;
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use crate::clock::{RefClock, Timestamp};
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use crate::collections::{HashMap, HashSet};
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use crate::crypto;
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use crate::crypto::{Signer, Verified};
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use crate::git;
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use crate::git::Url;
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use crate::identity::{Doc, Id};
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use crate::service::config::ProjectTracking;
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use crate::service::message::Address;
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use crate::service::message::{NodeAnnouncement, RefsAnnouncement};
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use crate::service::peer::{Session, SessionError, SessionState};
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use crate::storage;
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use crate::storage::{Inventory, ReadRepository, RefUpdate, WriteRepository, WriteStorage};
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pub use crate::service::config::{Config, Network};
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pub use crate::service::message::{Envelope, Message};
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use self::message::{InventoryAnnouncement, NodeFeatures};
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use self::reactor::Reactor;
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pub const DEFAULT_PORT: u16 = 8776;
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pub const PROTOCOL_VERSION: u32 = 1;
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pub const TARGET_OUTBOUND_PEERS: usize = 8;
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pub const IDLE_INTERVAL: LocalDuration = LocalDuration::from_secs(30);
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pub const ANNOUNCE_INTERVAL: LocalDuration = LocalDuration::from_secs(30);
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pub const SYNC_INTERVAL: LocalDuration = LocalDuration::from_secs(60);
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pub const PRUNE_INTERVAL: LocalDuration = LocalDuration::from_mins(30);
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pub const MAX_CONNECTION_ATTEMPTS: usize = 3;
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pub const MAX_TIME_DELTA: LocalDuration = LocalDuration::from_mins(60);
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/// Network node identifier.
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pub type NodeId = crypto::PublicKey;
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/// Network routing table. Keeps track of where projects are hosted.
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pub type Routing = HashMap<Id, HashSet<NodeId>>;
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/// A service event.
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#[derive(Debug, Clone)]
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pub enum Event {
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RefsFetched {
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from: Url,
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project: Id,
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updated: Vec<RefUpdate>,
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},
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}
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/// Error returned by [`Command::Fetch`].
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#[derive(thiserror::Error, Debug)]
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pub enum FetchError {
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#[error(transparent)]
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Git(#[from] git::raw::Error),
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#[error(transparent)]
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Storage(#[from] storage::Error),
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#[error(transparent)]
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Fetch(#[from] storage::FetchError),
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}
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/// Result of looking up seeds in our routing table.
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#[derive(Debug)]
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pub enum FetchLookup {
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/// Found seeds for the given project.
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Found {
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seeds: NonEmpty<net::SocketAddr>,
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results: chan::Receiver<FetchResult>,
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},
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/// Can't fetch because no seeds were found for this project.
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NotFound,
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/// Can't fetch because the project isn't tracked.
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NotTracking,
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/// Error trying to find seeds.
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Error(FetchError),
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}
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/// Result of a fetch request from a specific seed.
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#[derive(Debug)]
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#[allow(clippy::large_enum_variant)]
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pub enum FetchResult {
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/// Successful fetch from a seed.
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Fetched {
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from: net::SocketAddr,
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updated: Vec<RefUpdate>,
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},
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/// Error fetching the resource from a seed.
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Error {
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from: net::SocketAddr,
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error: FetchError,
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},
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}
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/// Commands sent to the service by the operator.
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#[derive(Debug)]
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pub enum Command {
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AnnounceRefs(Id),
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Connect(net::SocketAddr),
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Fetch(Id, chan::Sender<FetchLookup>),
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Track(Id, chan::Sender<bool>),
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Untrack(Id, chan::Sender<bool>),
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}
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/// Command-related errors.
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#[derive(thiserror::Error, Debug)]
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pub enum CommandError {}
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#[derive(Debug)]
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pub struct Service<A, S, G> {
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/// Service configuration.
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config: Config,
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/// Our cryptographic signer and key.
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signer: G,
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/// Project storage.
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storage: S,
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/// Tracks the location of projects.
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routing: Routing,
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/// Peer sessions, currently or recently connected.
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sessions: Sessions,
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/// Keeps track of peer states.
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peers: BTreeMap<NodeId, Peer>,
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/// Clock. Tells the time.
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clock: RefClock,
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/// Interface to the I/O reactor.
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reactor: Reactor,
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/// Peer address manager.
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addrmgr: AddressManager<A>,
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/// Source of entropy.
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rng: Rng,
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/// Whether our local inventory no long represents what we have announced to the network.
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out_of_sync: bool,
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/// Last time the service was idle.
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last_idle: LocalTime,
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/// Last time the service synced.
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last_sync: LocalTime,
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/// Last time the service routing table was pruned.
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last_prune: LocalTime,
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/// Last time the service announced its inventory.
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last_announce: LocalTime,
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/// Time when the service was initialized.
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start_time: LocalTime,
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}
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impl<A, S, G> Service<A, S, G>
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where
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A: address_book::Store,
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S: WriteStorage + 'static,
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G: crypto::Signer,
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{
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pub fn new(
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config: Config,
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clock: RefClock,
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storage: S,
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addresses: A,
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signer: G,
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rng: Rng,
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) -> Self {
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let addrmgr = AddressManager::new(addresses);
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let routing = HashMap::with_hasher(rng.clone().into());
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let sessions = Sessions::new(rng.clone());
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let network = config.network;
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Self {
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config,
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storage,
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addrmgr,
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signer,
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rng,
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clock,
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routing,
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peers: BTreeMap::new(),
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reactor: Reactor::new(network),
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sessions,
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out_of_sync: false,
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last_idle: LocalTime::default(),
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last_sync: LocalTime::default(),
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last_prune: LocalTime::default(),
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last_announce: LocalTime::default(),
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start_time: LocalTime::default(),
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}
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}
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pub fn node_id(&self) -> NodeId {
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*self.signer.public_key()
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}
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pub fn seeds(&self, id: &Id) -> Box<dyn Iterator<Item = (&NodeId, &Session)> + '_> {
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if let Some(peers) = self.routing.get(id) {
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Box::new(
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peers
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.iter()
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.filter_map(|id| self.sessions.by_id(id).map(|p| (id, p))),
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)
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} else {
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Box::new(std::iter::empty())
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}
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}
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pub fn tracked(&self) -> Result<Vec<Id>, storage::Error> {
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let tracked = match &self.config.project_tracking {
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ProjectTracking::All { blocked } => self
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.storage
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.inventory()?
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.into_iter()
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.filter(|id| !blocked.contains(id))
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.collect(),
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ProjectTracking::Allowed(projs) => projs.iter().cloned().collect(),
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};
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Ok(tracked)
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}
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/// Track a project.
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/// Returns whether or not the tracking policy was updated.
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pub fn track(&mut self, id: Id) -> bool {
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self.out_of_sync = self.config.track(id);
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self.out_of_sync
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}
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/// Untrack a project.
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/// Returns whether or not the tracking policy was updated.
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/// Note that when untracking, we don't announce anything to the network. This is because by
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/// simply not announcing it anymore, it will eventually be pruned by nodes.
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pub fn untrack(&mut self, id: Id) -> bool {
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self.config.untrack(id)
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}
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/// Find the closest `n` peers by proximity in tracking graphs.
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/// Returns a sorted list from the closest peer to the furthest.
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/// Peers with more trackings in common score score higher.
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#[allow(unused)]
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pub fn closest_peers(&self, n: usize) -> Vec<NodeId> {
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todo!()
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}
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/// Get the connected peers.
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pub fn sessions(&self) -> &Sessions {
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&self.sessions
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}
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/// Get the current inventory.
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pub fn inventory(&self) -> Result<Inventory, storage::Error> {
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self.storage.inventory()
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}
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/// Get the storage instance.
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pub fn storage(&self) -> &S {
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&self.storage
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}
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/// Get the mutable storage instance.
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pub fn storage_mut(&mut self) -> &mut S {
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&mut self.storage
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}
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/// Get a project from storage, using the local node's key.
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pub fn get(&self, proj: &Id) -> Result<Option<Doc<Verified>>, storage::Error> {
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self.storage.get(&self.node_id(), proj)
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}
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/// Get the local signer.
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pub fn signer(&self) -> &G {
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&self.signer
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}
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/// Get the clock.
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pub fn clock(&self) -> &RefClock {
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&self.clock
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}
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/// Get the local service time.
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pub fn local_time(&self) -> LocalTime {
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self.clock.local_time()
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}
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/// Get service configuration.
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pub fn config(&self) -> &Config {
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&self.config
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}
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/// Get reference to routing table.
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pub fn routing(&self) -> &Routing {
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&self.routing
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}
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/// Get I/O reactor.
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pub fn reactor(&mut self) -> &mut Reactor {
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&mut self.reactor
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}
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pub fn lookup(&self, id: &Id) -> Lookup {
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Lookup {
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local: self.storage.get(&self.node_id(), id).unwrap(),
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remote: self
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.routing
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.get(id)
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.map_or(vec![], |r| r.iter().cloned().collect()),
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}
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}
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pub fn initialize(&mut self, time: LocalTime) {
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trace!("Init {}", time.as_secs());
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self.start_time = time;
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// Connect to configured peers.
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let addrs = self.config.connect.clone();
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for addr in addrs {
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self.reactor.connect(addr);
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}
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}
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pub fn tick(&mut self, now: nakamoto::LocalTime) {
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trace!("Tick +{}", now - self.start_time);
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self.clock.set(now);
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}
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pub fn wake(&mut self) {
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let now = self.clock.local_time();
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trace!("Wake +{}", now - self.start_time);
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if now - self.last_idle >= IDLE_INTERVAL {
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debug!("Running 'idle' task...");
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self.maintain_connections();
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self.reactor.wakeup(IDLE_INTERVAL);
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self.last_idle = now;
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}
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if now - self.last_sync >= SYNC_INTERVAL {
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debug!("Running 'sync' task...");
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// TODO: What do we do here?
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self.reactor.wakeup(SYNC_INTERVAL);
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self.last_sync = now;
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}
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if now - self.last_announce >= ANNOUNCE_INTERVAL {
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if self.out_of_sync {
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self.announce_inventory().unwrap();
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}
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self.reactor.wakeup(ANNOUNCE_INTERVAL);
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self.last_announce = now;
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}
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if now - self.last_prune >= PRUNE_INTERVAL {
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debug!("Running 'prune' task...");
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self.prune_routing_entries();
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self.reactor.wakeup(PRUNE_INTERVAL);
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self.last_prune = now;
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}
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}
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pub fn command(&mut self, cmd: Command) {
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debug!("Command {:?}", cmd);
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match cmd {
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Command::Connect(addr) => self.reactor.connect(addr),
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Command::Fetch(id, resp) => {
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if !self.config.is_tracking(&id) {
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resp.send(FetchLookup::NotTracking).ok();
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return;
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}
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let seeds = self.seeds(&id).collect::<Vec<_>>();
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let seeds = if let Some(seeds) = NonEmpty::from_vec(seeds) {
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seeds
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} else {
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log::error!("No seeds found for {}", id);
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resp.send(FetchLookup::NotFound).ok();
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return;
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};
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log::debug!("Found {} seeds for {}", seeds.len(), id);
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let mut repo = match self.storage.repository(&id) {
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Ok(repo) => repo,
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Err(err) => {
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log::error!("Error opening repo for {}: {}", id, err);
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resp.send(FetchLookup::Error(err.into())).ok();
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return;
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}
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};
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let (results_, results) = chan::bounded(seeds.len());
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resp.send(FetchLookup::Found {
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seeds: seeds.clone().map(|(_, peer)| peer.addr),
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results,
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})
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.ok();
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// TODO: Limit the number of seeds we fetch from? Randomize?
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for (_, peer) in seeds {
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match repo.fetch(&Url {
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scheme: git::url::Scheme::Git,
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host: Some(peer.addr.ip().to_string()),
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port: Some(peer.addr.port()),
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// TODO: Fix upstream crate so that it adds a `/` when needed.
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path: format!("/{}", id).into(),
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..Url::default()
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}) {
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Ok(updated) => {
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results_
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.send(FetchResult::Fetched {
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from: peer.addr,
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updated,
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})
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.ok();
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}
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Err(err) => {
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results_
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.send(FetchResult::Error {
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from: peer.addr,
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error: err.into(),
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})
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.ok();
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}
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}
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}
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}
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Command::Track(id, resp) => {
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resp.send(self.track(id)).ok();
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}
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Command::Untrack(id, resp) => {
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resp.send(self.untrack(id)).ok();
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}
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Command::AnnounceRefs(id) => {
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let node = self.node_id();
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let repo = self.storage.repository(&id).unwrap();
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let remote = repo.remote(&node).unwrap();
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let peers = self.sessions.negotiated().map(|(_, p)| p);
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let refs = remote.refs.into();
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let message = RefsAnnouncement { id, refs };
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let signature = message.sign(&self.signer);
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self.reactor.broadcast(
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Message::RefsAnnouncement {
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node,
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message,
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signature,
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},
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peers,
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);
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}
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}
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}
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pub fn attempted(&mut self, addr: &std::net::SocketAddr) {
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let address = Address::from(*addr);
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let ip = addr.ip();
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let persistent = self.config.is_persistent(&address);
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let peer = self
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.sessions
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.entry(ip)
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.or_insert_with(|| Session::new(*addr, Link::Outbound, persistent));
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peer.attempted();
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}
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|
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pub fn connected(
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&mut self,
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addr: std::net::SocketAddr,
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_local_addr: &std::net::SocketAddr,
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link: Link,
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) {
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let ip = addr.ip();
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let address = addr.into();
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debug!("Connected to {} ({:?})", ip, link);
|
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|
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// For outbound connections, we are the first to say "Hello".
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// For inbound connections, we wait for the remote to say "Hello" first.
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// TODO: How should we deal with multiple peers connecting from the same IP address?
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if link.is_outbound() {
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if let Some(peer) = self.sessions.get_mut(&ip) {
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if link.is_outbound() {
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self.reactor.write_all(
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addr,
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gossip::handshake(
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self.clock.timestamp(),
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&self.storage,
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&self.signer,
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&self.config,
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),
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);
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}
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peer.connected(link);
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}
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} else {
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self.sessions.insert(
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ip,
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Session::new(addr, Link::Inbound, self.config.is_persistent(&address)),
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);
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}
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}
|
|
|
|
pub fn disconnected(
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&mut self,
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addr: &std::net::SocketAddr,
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reason: nakamoto::DisconnectReason<DisconnectReason>,
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) {
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let since = self.local_time();
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let address = Address::from(*addr);
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let ip = addr.ip();
|
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debug!("Disconnected from {} ({})", ip, reason);
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|
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if let Some(peer) = self.sessions.get_mut(&ip) {
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peer.state = SessionState::Disconnected { since };
|
|
|
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// Attempt to re-connect to persistent peers.
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if self.config.is_persistent(&address) && peer.attempts() < MAX_CONNECTION_ATTEMPTS {
|
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if reason.is_dial_err() {
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return;
|
|
}
|
|
if let nakamoto::DisconnectReason::Protocol(r) = reason {
|
|
if !r.is_transient() {
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return;
|
|
}
|
|
}
|
|
// TODO: Eventually we want a delay before attempting a reconnection,
|
|
// with exponential back-off.
|
|
debug!("Reconnecting to {} (attempts={})...", ip, peer.attempts());
|
|
|
|
// TODO: Try to reconnect only if the peer was attempted. A disconnect without
|
|
// even a successful attempt means that we're unlikely to be able to reconnect.
|
|
|
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self.reactor.connect(*addr);
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} else {
|
|
// TODO: Non-persistent peers should be removed from the
|
|
// map here or at some later point.
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn received_message(&mut self, addr: &net::SocketAddr, envelope: Envelope) {
|
|
match self.handle_message(addr, envelope) {
|
|
Ok(relay) => {
|
|
if let Some(msg) = relay {
|
|
let negotiated = self
|
|
.sessions
|
|
.negotiated()
|
|
.filter(|(ip, _)| **ip != addr.ip())
|
|
.map(|(_, p)| p);
|
|
|
|
self.reactor.relay(msg, negotiated.clone());
|
|
}
|
|
}
|
|
Err(SessionError::NotFound(ip)) => {
|
|
error!("Session not found for {}", ip);
|
|
}
|
|
Err(err) => {
|
|
// If there's an error, stop processing messages from this peer.
|
|
// However, we still relay messages returned up to this point.
|
|
self.reactor.disconnect(*addr, DisconnectReason::Error(err));
|
|
|
|
// FIXME: The peer should be set in a state such that we don'that
|
|
// process further messages.
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn handle_message(
|
|
&mut self,
|
|
remote: &net::SocketAddr,
|
|
envelope: Envelope,
|
|
) -> Result<Option<Message>, peer::SessionError> {
|
|
let peer_ip = remote.ip();
|
|
let peer = if let Some(peer) = self.sessions.get_mut(&peer_ip) {
|
|
peer
|
|
} else {
|
|
return Err(SessionError::NotFound(remote.ip()));
|
|
};
|
|
|
|
if envelope.magic != self.config.network.magic() {
|
|
return Err(SessionError::WrongMagic(envelope.magic));
|
|
}
|
|
debug!("Received {:?} from {}", &envelope.msg, peer.ip());
|
|
|
|
match (&peer.state, envelope.msg) {
|
|
(
|
|
SessionState::Initial,
|
|
Message::Initialize {
|
|
id,
|
|
version,
|
|
addrs,
|
|
git,
|
|
},
|
|
) => {
|
|
if version != PROTOCOL_VERSION {
|
|
return Err(SessionError::WrongVersion(version));
|
|
}
|
|
// Nb. This is a very primitive handshake. Eventually we should have anyhow
|
|
// extra "acknowledgment" message sent when the `Initialize` is well received.
|
|
if peer.link.is_inbound() {
|
|
self.reactor.write_all(
|
|
peer.addr,
|
|
gossip::handshake(
|
|
self.clock.timestamp(),
|
|
&self.storage,
|
|
&self.signer,
|
|
&self.config,
|
|
),
|
|
);
|
|
}
|
|
// Nb. we don't set the peer timestamp here, since it is going to be
|
|
// set after the first message is received only. Setting it here would
|
|
// mean that messages received right after the handshake could be ignored.
|
|
peer.state = SessionState::Negotiated {
|
|
id,
|
|
since: self.clock.local_time(),
|
|
addrs,
|
|
git,
|
|
};
|
|
}
|
|
(SessionState::Initial, _) => {
|
|
debug!(
|
|
"Disconnecting peer {} for sending us a message before handshake",
|
|
peer.ip()
|
|
);
|
|
return Err(SessionError::Misbehavior);
|
|
}
|
|
(
|
|
SessionState::Negotiated { git, .. },
|
|
Message::InventoryAnnouncement {
|
|
node,
|
|
message,
|
|
signature,
|
|
},
|
|
) => {
|
|
let now = self.clock.local_time();
|
|
let peer = self.peers.entry(node).or_insert_with(Peer::default);
|
|
let relay = self.config.relay;
|
|
let git = git.clone();
|
|
|
|
// Don't allow messages from too far in the future.
|
|
if message.timestamp.saturating_sub(now.as_secs()) > MAX_TIME_DELTA.as_secs() {
|
|
return Err(SessionError::InvalidTimestamp(message.timestamp));
|
|
}
|
|
// Discard inventory messages we've already seen, otherwise update
|
|
// out last seen time.
|
|
if message.timestamp > peer.last_message {
|
|
peer.last_message = message.timestamp;
|
|
} else {
|
|
return Ok(None);
|
|
}
|
|
self.process_inventory(&message.inventory, node, &git);
|
|
|
|
if relay {
|
|
return Ok(Some(Message::InventoryAnnouncement {
|
|
node,
|
|
message,
|
|
signature,
|
|
}));
|
|
}
|
|
}
|
|
// Process a peer inventory update announcement by (maybe) fetching.
|
|
(
|
|
SessionState::Negotiated { git, .. },
|
|
Message::RefsAnnouncement {
|
|
node,
|
|
message,
|
|
signature,
|
|
},
|
|
) => {
|
|
// FIXME: Check message timestamp.
|
|
|
|
if message.verify(&node, &signature) {
|
|
// TODO: Buffer/throttle fetches.
|
|
// TODO: Check that we're tracking this user as well.
|
|
if self.config.is_tracking(&message.id) {
|
|
// TODO: Check refs to see if we should try to fetch or not.
|
|
let updated = self.storage.fetch(&message.id, git).unwrap();
|
|
let is_updated = !updated.is_empty();
|
|
|
|
self.reactor.event(Event::RefsFetched {
|
|
from: git.clone(),
|
|
project: message.id.clone(),
|
|
updated,
|
|
});
|
|
|
|
if is_updated {
|
|
return Ok(Some(Message::RefsAnnouncement {
|
|
node,
|
|
message,
|
|
signature,
|
|
}));
|
|
}
|
|
}
|
|
} else {
|
|
return Err(SessionError::Misbehavior);
|
|
}
|
|
}
|
|
(
|
|
SessionState::Negotiated { .. },
|
|
Message::NodeAnnouncement {
|
|
node,
|
|
message,
|
|
signature,
|
|
},
|
|
) => {
|
|
// FIXME: Check message timestamp.
|
|
|
|
if !message.verify(&node, &signature) {
|
|
return Err(SessionError::Misbehavior);
|
|
}
|
|
log::warn!("Node announcement handling is not implemented");
|
|
}
|
|
(SessionState::Negotiated { .. }, Message::Subscribe(subscribe)) => {
|
|
peer.subscribe = Some(subscribe);
|
|
}
|
|
(SessionState::Negotiated { .. }, Message::Initialize { .. }) => {
|
|
debug!(
|
|
"Disconnecting peer {} for sending us a redundant handshake message",
|
|
peer.ip()
|
|
);
|
|
return Err(SessionError::Misbehavior);
|
|
}
|
|
(SessionState::Disconnected { .. }, msg) => {
|
|
debug!("Ignoring {:?} from disconnected peer {}", msg, peer.ip());
|
|
}
|
|
}
|
|
Ok(None)
|
|
}
|
|
|
|
/// Process a peer inventory announcement by updating our routing table.
|
|
fn process_inventory(&mut self, inventory: &Inventory, from: NodeId, remote: &Url) {
|
|
for proj_id in inventory {
|
|
let inventory = self
|
|
.routing
|
|
.entry(proj_id.clone())
|
|
.or_insert_with(|| HashSet::with_hasher(self.rng.clone().into()));
|
|
|
|
// TODO: Fire an event on routing update.
|
|
if inventory.insert(from) && self.config.is_tracking(proj_id) {
|
|
self.storage.fetch(proj_id, remote).unwrap();
|
|
}
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////
|
|
// Periodic tasks
|
|
////////////////////////////////////////////////////////////////////////////
|
|
|
|
/// Announce our inventory to all connected peers.
|
|
fn announce_inventory(&mut self) -> Result<(), storage::Error> {
|
|
let inventory = self.storage().inventory()?;
|
|
let inv = Message::inventory(
|
|
gossip::inventory(self.clock.timestamp(), inventory),
|
|
&self.signer,
|
|
);
|
|
|
|
for addr in self.sessions.negotiated().map(|(_, p)| p.addr) {
|
|
self.reactor.write(addr, inv.clone());
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
fn prune_routing_entries(&mut self) {
|
|
// TODO
|
|
}
|
|
|
|
fn maintain_connections(&mut self) {
|
|
// TODO: Connect to all potential seeds.
|
|
if self.sessions.len() < TARGET_OUTBOUND_PEERS {
|
|
let delta = TARGET_OUTBOUND_PEERS - self.sessions.len();
|
|
|
|
for _ in 0..delta {
|
|
// TODO: Connect to random peer.
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, Clone)]
|
|
pub enum DisconnectReason {
|
|
User,
|
|
Error(SessionError),
|
|
}
|
|
|
|
impl DisconnectReason {
|
|
fn is_transient(&self) -> bool {
|
|
match self {
|
|
Self::User => false,
|
|
Self::Error(..) => false,
|
|
}
|
|
}
|
|
}
|
|
|
|
impl From<DisconnectReason> for nakamoto_net::DisconnectReason<DisconnectReason> {
|
|
fn from(reason: DisconnectReason) -> Self {
|
|
nakamoto_net::DisconnectReason::Protocol(reason)
|
|
}
|
|
}
|
|
|
|
impl fmt::Display for DisconnectReason {
|
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
|
match self {
|
|
Self::User => write!(f, "user"),
|
|
Self::Error(err) => write!(f, "error: {}", err),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<A, S, G> Iterator for Service<A, S, G> {
|
|
type Item = reactor::Io;
|
|
|
|
fn next(&mut self) -> Option<Self::Item> {
|
|
self.reactor.next()
|
|
}
|
|
}
|
|
|
|
/// Result of a project lookup.
|
|
#[derive(Debug)]
|
|
pub struct Lookup {
|
|
/// Whether the project was found locally or not.
|
|
pub local: Option<Doc<Verified>>,
|
|
/// A list of remote peers on which the project is known to exist.
|
|
pub remote: Vec<NodeId>,
|
|
}
|
|
|
|
/// Information on a peer, that we may or may not be connected to.
|
|
#[derive(Default, Debug)]
|
|
pub struct Peer {
|
|
/// Timestamp of the last message received from peer.
|
|
pub last_message: Timestamp,
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
/// Holds currently (or recently) connected peers.
|
|
pub struct Sessions(AddressBook<IpAddr, Session>);
|
|
|
|
impl Sessions {
|
|
pub fn new(rng: Rng) -> Self {
|
|
Self(AddressBook::new(rng))
|
|
}
|
|
|
|
pub fn by_id(&self, id: &NodeId) -> Option<&Session> {
|
|
self.0.values().find(|p| {
|
|
if let SessionState::Negotiated { id: _id, .. } = &p.state {
|
|
_id == id
|
|
} else {
|
|
false
|
|
}
|
|
})
|
|
}
|
|
|
|
/// Iterator over fully negotiated peers.
|
|
pub fn negotiated(&self) -> impl Iterator<Item = (&IpAddr, &Session)> + Clone {
|
|
self.0.iter().filter(move |(_, p)| p.is_negotiated())
|
|
}
|
|
}
|
|
|
|
impl Deref for Sessions {
|
|
type Target = AddressBook<IpAddr, Session>;
|
|
|
|
fn deref(&self) -> &Self::Target {
|
|
&self.0
|
|
}
|
|
}
|
|
|
|
impl DerefMut for Sessions {
|
|
fn deref_mut(&mut self) -> &mut Self::Target {
|
|
&mut self.0
|
|
}
|
|
}
|
|
|
|
mod gossip {
|
|
use super::*;
|
|
|
|
pub fn handshake<G: Signer, S: ReadStorage>(
|
|
timestamp: Timestamp,
|
|
storage: &S,
|
|
signer: &G,
|
|
config: &Config,
|
|
) -> [Message; 4] {
|
|
let git = config.git_url.clone();
|
|
let inventory = storage.inventory().unwrap();
|
|
|
|
[
|
|
Message::init(*signer.public_key(), config.listen.clone(), git),
|
|
Message::node(gossip::node(timestamp, config), signer),
|
|
Message::inventory(gossip::inventory(timestamp, inventory), signer),
|
|
Message::subscribe(config.filter(), timestamp, Timestamp::MAX),
|
|
]
|
|
}
|
|
|
|
pub fn node(timestamp: Timestamp, config: &Config) -> NodeAnnouncement {
|
|
let features = NodeFeatures::default();
|
|
let alias = config.alias();
|
|
let addresses = vec![]; // TODO
|
|
|
|
NodeAnnouncement {
|
|
features,
|
|
timestamp,
|
|
alias,
|
|
addresses,
|
|
}
|
|
}
|
|
|
|
pub fn inventory(timestamp: Timestamp, inventory: Vec<Id>) -> InventoryAnnouncement {
|
|
InventoryAnnouncement {
|
|
inventory,
|
|
timestamp,
|
|
}
|
|
}
|
|
}
|