1pub(crate) mod temporary_bans;
2mod transport;
3
4use crate::behavior::persistent_parameters::{KnownPeersRegistry, StubNetworkingParametersManager};
5use crate::behavior::{Behavior, BehaviorConfig};
6use crate::constructor::temporary_bans::TemporaryBans;
7use crate::constructor::transport::build_transport;
8use crate::node::Node;
9use crate::node_runner::{NodeRunner, NodeRunnerConfig};
10use crate::protocols::autonat_wrapper::Config as AutonatWrapperConfig;
11use crate::protocols::request_response::request_response_factory::RequestHandler;
12use crate::protocols::reserved_peers::Config as ReservedPeersConfig;
13use crate::shared::Shared;
14use crate::utils::rate_limiter::RateLimiter;
15use crate::utils::{SubspaceMetrics, strip_peer_id};
16use backoff::{ExponentialBackoff, SystemClock};
17use futures::channel::mpsc;
18use libp2p::autonat::Config as AutonatConfig;
19use libp2p::connection_limits::ConnectionLimits;
20use libp2p::gossipsub::{
21 Config as GossipsubConfig, ConfigBuilder as GossipsubConfigBuilder,
22 Message as GossipsubMessage, MessageId, ValidationMode,
23};
24use libp2p::identify::Config as IdentifyConfig;
25use libp2p::kad::store::RecordStore;
26use libp2p::kad::{
27 BucketInserts, Config as KademliaConfig, Mode, ProviderRecord, Record, RecordKey, StoreInserts,
28 store,
29};
30use libp2p::metrics::Metrics;
31use libp2p::multiaddr::Protocol;
32use libp2p::yamux::Config as YamuxConfig;
33use libp2p::{Multiaddr, PeerId, StreamProtocol, SwarmBuilder, TransportError, identity};
34use parking_lot::Mutex;
35use prometheus_client::registry::Registry;
36use std::borrow::Cow;
37use std::iter::Empty;
38use std::sync::Arc;
39use std::time::{Duration, Instant};
40use std::{fmt, io, iter};
41use subspace_core_primitives::hashes;
42use subspace_core_primitives::pieces::Piece;
43use thiserror::Error;
44use tracing::{debug, error, info};
45
46const DEFAULT_NETWORK_PROTOCOL_VERSION: &str = "dev";
47const KADEMLIA_PROTOCOL: &str = "/subspace/kad/0.1.0";
48const GOSSIPSUB_PROTOCOL_PREFIX: &str = "subspace/gossipsub";
49
50const SWARM_MAX_NEGOTIATING_INBOUND_STREAMS: usize = 100000;
53const IDLE_CONNECTION_TIMEOUT: Duration = Duration::from_secs(3);
55const SWARM_MAX_ESTABLISHED_INCOMING_CONNECTIONS: u32 = 100;
57const SWARM_MAX_ESTABLISHED_OUTGOING_CONNECTIONS: u32 = 100;
59const SWARM_MAX_PENDING_INCOMING_CONNECTIONS: u32 = 80;
61const SWARM_MAX_PENDING_OUTGOING_CONNECTIONS: u32 = 80;
63const KADEMLIA_QUERY_TIMEOUT: Duration = Duration::from_secs(40);
64const SWARM_MAX_ESTABLISHED_CONNECTIONS_PER_PEER: u32 = 3;
65const MAX_CONCURRENT_STREAMS_PER_CONNECTION: usize = 10;
66const ENABLE_GOSSIP_PROTOCOL: bool = false;
69
70const TEMPORARY_BANS_CACHE_SIZE: u32 = 10_000;
71const TEMPORARY_BANS_DEFAULT_BACKOFF_INITIAL_INTERVAL: Duration = Duration::from_secs(5);
72const TEMPORARY_BANS_DEFAULT_BACKOFF_RANDOMIZATION_FACTOR: f64 = 0.1;
73const TEMPORARY_BANS_DEFAULT_BACKOFF_MULTIPLIER: f64 = 1.5;
74const TEMPORARY_BANS_DEFAULT_MAX_INTERVAL: Duration = Duration::from_secs(30 * 60);
75
76const DIALING_INTERVAL_IN_SECS: Duration = Duration::from_secs(1);
79
80const YAMUX_MAX_STREAMS: usize = 256;
86
87pub(crate) const AUTONAT_MAX_CONFIDENCE: usize = 3;
89const AUTONAT_SERVER_PROBE_DELAY: Duration = Duration::from_secs(3600 * 24 * 365);
91
92#[derive(Clone, Debug)]
94pub enum KademliaMode {
95 Static(Mode),
97 Dynamic,
99}
100
101impl KademliaMode {
102 pub fn is_dynamic(&self) -> bool {
104 matches!(self, Self::Dynamic)
105 }
106
107 pub fn is_static(&self) -> bool {
109 matches!(self, Self::Static(..))
110 }
111}
112
113pub(crate) struct DummyRecordStore;
114
115impl RecordStore for DummyRecordStore {
116 type RecordsIter<'a>
117 = Empty<Cow<'a, Record>>
118 where
119 Self: 'a;
120 type ProvidedIter<'a>
121 = Empty<Cow<'a, ProviderRecord>>
122 where
123 Self: 'a;
124
125 #[inline]
126 fn get(&self, _key: &RecordKey) -> Option<Cow<'_, Record>> {
127 None
129 }
130
131 #[inline]
132 fn put(&mut self, _record: Record) -> store::Result<()> {
133 Ok(())
135 }
136
137 #[inline]
138 fn remove(&mut self, _key: &RecordKey) {
139 }
141
142 #[inline]
143 fn records(&self) -> Self::RecordsIter<'_> {
144 iter::empty()
146 }
147
148 #[inline]
149 fn add_provider(&mut self, _record: ProviderRecord) -> store::Result<()> {
150 Ok(())
152 }
153
154 #[inline]
155 fn providers(&self, _key: &RecordKey) -> Vec<ProviderRecord> {
156 Vec::new()
158 }
159
160 #[inline]
161 fn provided(&self) -> Self::ProvidedIter<'_> {
162 iter::empty()
164 }
165
166 #[inline]
167 fn remove_provider(&mut self, _key: &RecordKey, _provider: &PeerId) {
168 }
170}
171
172pub struct Config {
174 pub keypair: identity::Keypair,
176 pub listen_on: Vec<Multiaddr>,
178 pub listen_on_fallback_to_random_port: bool,
180 pub timeout: Duration,
183 pub identify: IdentifyConfig,
185 pub kademlia: KademliaConfig,
187 pub gossipsub: Option<GossipsubConfig>,
189 pub yamux_config: YamuxConfig,
191 pub allow_non_global_addresses_in_dht: bool,
193 pub initial_random_query_interval: Duration,
195 pub known_peers_registry: Box<dyn KnownPeersRegistry>,
197 pub request_response_protocols: Vec<Box<dyn RequestHandler>>,
199 pub reserved_peers: Vec<Multiaddr>,
201 pub max_established_incoming_connections: u32,
203 pub max_established_outgoing_connections: u32,
205 pub max_pending_incoming_connections: u32,
207 pub max_pending_outgoing_connections: u32,
209 pub temporary_bans_cache_size: u32,
211 pub temporary_ban_backoff: ExponentialBackoff,
213 pub libp2p_metrics: Option<Metrics>,
215 pub metrics: Option<SubspaceMetrics>,
217 pub protocol_version: String,
219 pub bootstrap_addresses: Vec<Multiaddr>,
221 pub kademlia_mode: KademliaMode,
225 pub external_addresses: Vec<Multiaddr>,
228}
229
230impl fmt::Debug for Config {
231 #[inline]
232 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
233 f.debug_struct("Config").finish()
234 }
235}
236
237impl Default for Config {
240 #[inline]
241 fn default() -> Self {
242 let ed25519_keypair = identity::ed25519::Keypair::generate();
243 let keypair = identity::Keypair::from(ed25519_keypair);
244
245 Self::new(DEFAULT_NETWORK_PROTOCOL_VERSION.to_string(), keypair, None)
246 }
247}
248
249impl Config {
250 pub fn new(
253 protocol_version: String,
254 keypair: identity::Keypair,
255 prometheus_registry: Option<&mut Registry>,
256 ) -> Self {
257 let (libp2p_metrics, metrics) = prometheus_registry
258 .map(|registry| {
259 (
260 Some(Metrics::new(registry)),
261 Some(SubspaceMetrics::new(registry)),
262 )
263 })
264 .unwrap_or((None, None));
265
266 let mut kademlia = KademliaConfig::new(
267 StreamProtocol::try_from_owned(KADEMLIA_PROTOCOL.to_owned())
268 .expect("Manual protocol name creation."),
269 );
270 kademlia
271 .set_query_timeout(KADEMLIA_QUERY_TIMEOUT)
272 .disjoint_query_paths(true)
273 .set_max_packet_size(2 * Piece::SIZE)
274 .set_kbucket_inserts(BucketInserts::Manual)
275 .set_record_filtering(StoreInserts::FilterBoth)
276 .set_provider_record_ttl(None)
278 .set_provider_publication_interval(None)
279 .set_record_ttl(None)
280 .set_replication_interval(None);
281
282 let mut yamux_config = YamuxConfig::default();
283 yamux_config.set_max_num_streams(YAMUX_MAX_STREAMS);
284
285 let gossipsub = ENABLE_GOSSIP_PROTOCOL.then(|| {
286 GossipsubConfigBuilder::default()
287 .protocol_id_prefix(GOSSIPSUB_PROTOCOL_PREFIX)
288 .validation_mode(ValidationMode::None)
290 .message_id_fn(|message: &GossipsubMessage| {
292 MessageId::from(*hashes::blake3_hash(&message.data))
293 })
294 .max_transmit_size(2 * 1024 * 1024) .build()
296 .expect("Default config for gossipsub is always correct; qed")
297 });
298
299 let protocol_version = format!("/subspace/2/{protocol_version}");
300 let identify = IdentifyConfig::new(protocol_version.clone(), keypair.public());
301
302 let temporary_ban_backoff = ExponentialBackoff {
303 current_interval: TEMPORARY_BANS_DEFAULT_BACKOFF_INITIAL_INTERVAL,
304 initial_interval: TEMPORARY_BANS_DEFAULT_BACKOFF_INITIAL_INTERVAL,
305 randomization_factor: TEMPORARY_BANS_DEFAULT_BACKOFF_RANDOMIZATION_FACTOR,
306 multiplier: TEMPORARY_BANS_DEFAULT_BACKOFF_MULTIPLIER,
307 max_interval: TEMPORARY_BANS_DEFAULT_MAX_INTERVAL,
308 start_time: Instant::now(),
309 max_elapsed_time: None,
310 clock: SystemClock::default(),
311 };
312
313 Self {
314 keypair,
315 listen_on: vec![],
316 listen_on_fallback_to_random_port: true,
317 timeout: Duration::from_secs(10),
318 identify,
319 kademlia,
320 gossipsub,
321 allow_non_global_addresses_in_dht: false,
322 initial_random_query_interval: Duration::from_secs(1),
323 known_peers_registry: StubNetworkingParametersManager.boxed(),
324 request_response_protocols: Vec::new(),
325 yamux_config,
326 reserved_peers: Vec::new(),
327 max_established_incoming_connections: SWARM_MAX_ESTABLISHED_INCOMING_CONNECTIONS,
328 max_established_outgoing_connections: SWARM_MAX_ESTABLISHED_OUTGOING_CONNECTIONS,
329 max_pending_incoming_connections: SWARM_MAX_PENDING_INCOMING_CONNECTIONS,
330 max_pending_outgoing_connections: SWARM_MAX_PENDING_OUTGOING_CONNECTIONS,
331 temporary_bans_cache_size: TEMPORARY_BANS_CACHE_SIZE,
332 temporary_ban_backoff,
333 libp2p_metrics,
334 metrics,
335 protocol_version,
336 bootstrap_addresses: Vec::new(),
337 kademlia_mode: KademliaMode::Static(Mode::Client),
338 external_addresses: Vec::new(),
339 }
340 }
341}
342
343#[derive(Debug, Error)]
345pub enum CreationError {
346 #[error("Expected relay server node.")]
348 RelayServerExpected,
349 #[error("I/O error: {0}")]
351 Io(#[from] io::Error),
352 #[error("Transport creation error: {0}")]
354 TransportCreationError(Box<dyn std::error::Error + Send + Sync>),
357 #[error("Transport error when attempting to listen on multiaddr: {0}")]
359 TransportError(#[from] TransportError<io::Error>),
360}
361
362pub fn peer_id(keypair: &identity::Keypair) -> PeerId {
365 keypair.public().to_peer_id()
366}
367
368pub fn construct(config: Config) -> Result<(Node, NodeRunner), CreationError> {
370 let Config {
371 keypair,
372 listen_on,
373 listen_on_fallback_to_random_port,
374 timeout,
375 identify,
376 kademlia,
377 gossipsub,
378 yamux_config,
379 allow_non_global_addresses_in_dht,
380 initial_random_query_interval,
381 known_peers_registry,
382 request_response_protocols,
383 reserved_peers,
384 max_established_incoming_connections,
385 max_established_outgoing_connections,
386 max_pending_incoming_connections,
387 max_pending_outgoing_connections,
388 temporary_bans_cache_size,
389 temporary_ban_backoff,
390 libp2p_metrics,
391 metrics,
392 protocol_version,
393 bootstrap_addresses,
394 kademlia_mode,
395 external_addresses,
396 } = config;
397 let local_peer_id = peer_id(&keypair);
398
399 info!(
400 %allow_non_global_addresses_in_dht,
401 peer_id = %local_peer_id,
402 %protocol_version,
403 "DSN instance configured."
404 );
405
406 let connection_limits = ConnectionLimits::default()
407 .with_max_established_per_peer(Some(SWARM_MAX_ESTABLISHED_CONNECTIONS_PER_PEER))
408 .with_max_pending_incoming(Some(max_pending_incoming_connections))
409 .with_max_pending_outgoing(Some(max_pending_outgoing_connections))
410 .with_max_established_incoming(Some(max_established_incoming_connections))
411 .with_max_established_outgoing(Some(max_established_outgoing_connections));
412
413 debug!(?connection_limits, "DSN connection limits set.");
414
415 let autonat_boot_delay = if kademlia_mode.is_static() || !external_addresses.is_empty() {
416 AUTONAT_SERVER_PROBE_DELAY
417 } else {
418 AutonatConfig::default().boot_delay
419 };
420
421 debug!(
422 ?autonat_boot_delay,
423 ?kademlia_mode,
424 ?external_addresses,
425 "Autonat boot delay set."
426 );
427
428 let mut behaviour = Behavior::new(BehaviorConfig {
429 peer_id: local_peer_id,
430 identify,
431 kademlia,
432 gossipsub,
433 request_response_protocols,
434 request_response_max_concurrent_streams: {
435 let max_num_connections = max_established_incoming_connections as usize
436 + max_established_outgoing_connections as usize;
437 max_num_connections * MAX_CONCURRENT_STREAMS_PER_CONNECTION
438 },
439 connection_limits,
440 reserved_peers: ReservedPeersConfig {
441 reserved_peers: reserved_peers.clone(),
442 dialing_interval: DIALING_INTERVAL_IN_SECS,
443 },
444 autonat: AutonatWrapperConfig {
445 inner_config: AutonatConfig {
446 use_connected: true,
447 only_global_ips: !config.allow_non_global_addresses_in_dht,
448 confidence_max: AUTONAT_MAX_CONFIDENCE,
449 boot_delay: autonat_boot_delay,
450 ..Default::default()
451 },
452 local_peer_id,
453 servers: bootstrap_addresses.clone(),
454 },
455 });
456
457 match (kademlia_mode, external_addresses.is_empty()) {
458 (KademliaMode::Static(mode), _) => {
459 behaviour.kademlia.set_mode(Some(mode));
460 }
461 (KademliaMode::Dynamic, false) => {
462 behaviour.kademlia.set_mode(Some(Mode::Server));
463 }
464 _ => {
465 }
467 };
468
469 let temporary_bans = Arc::new(Mutex::new(TemporaryBans::new(
470 temporary_bans_cache_size,
471 temporary_ban_backoff,
472 )));
473
474 let mut swarm = SwarmBuilder::with_existing_identity(keypair)
475 .with_tokio()
476 .with_other_transport(|keypair| {
477 Ok(build_transport(
478 allow_non_global_addresses_in_dht,
479 keypair,
480 Arc::clone(&temporary_bans),
481 timeout,
482 yamux_config,
483 )?)
484 })
485 .map_err(|error| CreationError::TransportCreationError(error.into()))?
486 .with_behaviour(move |_keypair| Ok(behaviour))
487 .expect("Not fallible; qed")
488 .with_swarm_config(|config| {
489 config
490 .with_max_negotiating_inbound_streams(SWARM_MAX_NEGOTIATING_INBOUND_STREAMS)
491 .with_idle_connection_timeout(IDLE_CONNECTION_TIMEOUT)
492 })
493 .build();
494
495 let is_listening = !listen_on.is_empty();
496
497 for mut addr in listen_on {
499 if let Err(error) = swarm.listen_on(addr.clone()) {
500 if !listen_on_fallback_to_random_port {
501 return Err(error.into());
502 }
503
504 let addr_string = addr.to_string();
505 if let Some(Protocol::Tcp(_port)) = addr.pop() {
507 info!("Failed to listen on {addr_string} ({error}), falling back to random port");
508 addr.push(Protocol::Tcp(0));
509 swarm.listen_on(addr)?;
510 }
511 }
512 }
513
514 for addr in external_addresses.iter().cloned() {
516 info!("DSN external address added: {addr}");
517 swarm.add_external_address(addr);
518 }
519
520 let (command_sender, command_receiver) = mpsc::channel(1);
522
523 let rate_limiter = RateLimiter::new(
524 max_established_outgoing_connections,
525 max_pending_outgoing_connections,
526 );
527
528 let shared = Arc::new(Shared::new(local_peer_id, command_sender, rate_limiter));
529 let shared_weak = Arc::downgrade(&shared);
530
531 let node = Node::new(shared);
532 let node_runner = NodeRunner::new(NodeRunnerConfig {
533 allow_non_global_addresses_in_dht,
534 is_listening,
535 command_receiver,
536 swarm,
537 shared_weak,
538 next_random_query_interval: initial_random_query_interval,
539 known_peers_registry,
540 reserved_peers: strip_peer_id(reserved_peers).into_iter().collect(),
541 temporary_bans,
542 libp2p_metrics,
543 metrics,
544 protocol_version,
545 bootstrap_addresses,
546 });
547
548 Ok((node, node_runner))
549}