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Implements a timeout for peer banning (#665)

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* Adds peer ban timeout of 30 seconds

* Remove delay queue from discovery
This commit is contained in:
Age Manning 2019-12-06 14:13:43 +11:00 committed by Paul Hauner
parent 5e8f958977
commit 5a765396b7
14 changed files with 92 additions and 50 deletions
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2
account_manager/Cargo.toml
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@ -20,7 +20,7 @@ deposit_contract = { path = "../eth2/utils/deposit_contract" }
libc = "0.2.65"
eth2_ssz = { path = "../eth2/utils/ssz" }
eth2_ssz_derive = { path = "../eth2/utils/ssz_derive" }
hex = "0.4"
hex = "0.3"
validator_client = { path = "../validator_client" }
rayon = "1.2.0"
eth2_testnet_config = { path = "../eth2/utils/eth2_testnet_config" }

2
beacon_node/Cargo.toml
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@ -26,7 +26,7 @@ slog-term = "2.4.2"
slog-async = "2.3.0"
ctrlc = { version = "3.1.3", features = ["termination"] }
tokio = "0.1.22"
tokio-timer = "0.2.11"
tokio-timer = "0.2.12"
exit-future = "0.1.4"
env_logger = "0.7.1"
dirs = "2.0.2"

4
beacon_node/eth1/Cargo.toml
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@ -15,7 +15,7 @@ reqwest = "0.9"
futures = "0.1.25"
serde_json = "1.0"
serde = { version = "1.0", features = ["derive"] }
hex = "0.4"
hex = "0.3"
types = { path = "../../eth2/types"}
merkle_proof = { path = "../../eth2/utils/merkle_proof"}
eth2_ssz = { path = "../../eth2/utils/ssz"}
@ -23,7 +23,7 @@ tree_hash = { path = "../../eth2/utils/tree_hash"}
eth2_hashing = { path = "../../eth2/utils/eth2_hashing"}
parking_lot = "0.7"
slog = "^2.2.3"
tokio = "0.1.17"
tokio = "0.1.22"
state_processing = { path = "../../eth2/state_processing" }
exit-future = "0.1.4"
libflate = "0.1"

2
beacon_node/eth2-libp2p/Cargo.toml
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@ -21,12 +21,12 @@ tokio = "0.1.22"
futures = "0.1.29"
error-chain = "0.12.1"
dirs = "2.0.2"
smallvec = "0.6.11"
fnv = "1.0.6"
unsigned-varint = "0.2.3"
lazy_static = "1.4.0"
lighthouse_metrics = { path = "../../eth2/utils/lighthouse_metrics" }
tokio-io-timeout = "0.3.1"
smallvec = "1.0.0"
[dev-dependencies]
slog-stdlog = "4.0.0"

5
beacon_node/eth2-libp2p/src/behaviour.rs
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@ -241,6 +241,11 @@ impl<TSubstream: AsyncRead + AsyncWrite> Behaviour<TSubstream> {
self.discovery.peer_banned(peer_id);
}
/// Notify discovery that the peer has been unbanned.
pub fn peer_unbanned(&mut self, peer_id: &PeerId) {
self.discovery.peer_unbanned(peer_id);
}
/// Informs the discovery behaviour if a new IP/Port is set at the application layer
pub fn update_local_enr_socket(&mut self, socket: std::net::SocketAddr, is_tcp: bool) {
self.discovery.update_local_enr(socket, is_tcp);

7
beacon_node/eth2-libp2p/src/discovery.rs
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@ -39,7 +39,7 @@ pub struct Discovery<TSubstream> {
/// The target number of connected peers on the libp2p interface.
max_peers: usize,
/// directory to save ENR to
/// The directory where the ENR is stored.
enr_dir: String,
/// The delay between peer discovery searches.
@ -158,11 +158,14 @@ impl<TSubstream> Discovery<TSubstream> {
/// The peer has been banned. Add this peer to the banned list to prevent any future
/// re-connections.
// TODO: Remove the peer from the DHT if present
// TODO: Implement a timeout, after which we unban the peer
pub fn peer_banned(&mut self, peer_id: PeerId) {
self.banned_peers.insert(peer_id);
}
pub fn peer_unbanned(&mut self, peer_id: &PeerId) {
self.banned_peers.remove(peer_id);
}
/// Search for new peers using the underlying discovery mechanism.
fn find_peers(&mut self) {
// pick a random NodeId

93
beacon_node/eth2-libp2p/src/service.rs
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@ -12,13 +12,12 @@ use libp2p::core::{
transport::boxed::Boxed, ConnectedPoint,
};
use libp2p::{core, secio, swarm::NetworkBehaviour, PeerId, Swarm, Transport};
use slog::{crit, debug, info, trace, warn};
use smallvec::SmallVec;
use slog::{crit, debug, error, info, trace, warn};
use std::fs::File;
use std::io::prelude::*;
use std::io::{Error, ErrorKind};
use std::time::Duration;
use std::time::Instant;
use tokio::timer::DelayQueue;
type Libp2pStream = Boxed<(PeerId, StreamMuxerBox), Error>;
type Libp2pBehaviour = Behaviour<Substream<StreamMuxerBox>>;
@ -26,7 +25,7 @@ type Libp2pBehaviour = Behaviour<Substream<StreamMuxerBox>>;
const NETWORK_KEY_FILENAME: &str = "key";
/// The time in milliseconds to wait before banning a peer. This allows for any Goodbye messages to be
/// flushed and protocols to be negotiated.
const BAN_PEER_TIMEOUT: u64 = 200;
const BAN_PEER_WAIT_TIMEOUT: u64 = 200;
/// The configuration and state of the libp2p components for the beacon node.
pub struct Service {
@ -38,7 +37,10 @@ pub struct Service {
pub local_peer_id: PeerId,
/// A current list of peers to ban after a given timeout.
peers_to_ban: SmallVec<[(PeerId, Instant); 4]>,
peers_to_ban: DelayQueue<PeerId>,
/// A list of timeouts after which peers become unbanned.
peer_ban_timeout: DelayQueue<PeerId>,
/// Indicates if the listening address have been verified and compared to the expected ENR.
verified_listen_address: bool,
@ -157,18 +159,21 @@ impl Service {
Ok(Service {
local_peer_id,
swarm,
peers_to_ban: SmallVec::new(),
peers_to_ban: DelayQueue::new(),
peer_ban_timeout: DelayQueue::new(),
verified_listen_address: false,
log,
})
}
/// Adds a peer to be banned after a timeout period.
pub fn disconnect_and_ban_peer(&mut self, peer_id: PeerId) {
self.peers_to_ban.push((
peer_id,
Instant::now() + Duration::from_millis(BAN_PEER_TIMEOUT),
));
/// Adds a peer to be banned for a period of time, specified by a timeout.
pub fn disconnect_and_ban_peer(&mut self, peer_id: PeerId, timeout: Duration) {
error!(self.log, "Disconnecting and banning peer"; "peer_id" => format!("{:?}", peer_id), "timeout" => format!("{:?}", timeout));
self.peers_to_ban.insert(
peer_id.clone(),
Duration::from_millis(BAN_PEER_WAIT_TIMEOUT),
);
self.peer_ban_timeout.insert(peer_id, timeout);
}
}
@ -214,6 +219,48 @@ impl Stream for Service {
_ => break,
}
}
// check if peers need to be banned
loop {
match self.peers_to_ban.poll() {
Ok(Async::Ready(Some(peer_id))) => {
let peer_id = peer_id.into_inner();
Swarm::ban_peer_id(&mut self.swarm, peer_id.clone());
// TODO: Correctly notify protocols of the disconnect
// TODO: Also remove peer from the DHT: https://github.com/sigp/lighthouse/issues/629
let dummy_connected_point = ConnectedPoint::Dialer {
address: "/ip4/0.0.0.0"
.parse::<Multiaddr>()
.expect("valid multiaddr"),
};
self.swarm
.inject_disconnected(&peer_id, dummy_connected_point);
// inform the behaviour that the peer has been banned
self.swarm.peer_banned(peer_id);
}
Ok(Async::NotReady) | Ok(Async::Ready(None)) => break,
Err(e) => {
warn!(self.log, "Peer banning queue failed"; "error" => format!("{:?}", e));
}
}
}
// un-ban peer if it's timeout has expired
loop {
match self.peer_ban_timeout.poll() {
Ok(Async::Ready(Some(peer_id))) => {
let peer_id = peer_id.into_inner();
debug!(self.log, "Peer has been unbanned"; "peer" => format!("{:?}", peer_id));
self.swarm.peer_unbanned(&peer_id);
Swarm::unban_peer_id(&mut self.swarm, peer_id);
}
Ok(Async::NotReady) | Ok(Async::Ready(None)) => break,
Err(e) => {
warn!(self.log, "Peer banning timeout queue failed"; "error" => format!("{:?}", e));
}
}
}
// swarm is not ready
// check to see if the address is different to the config. If so, update our ENR
if !self.verified_listen_address {
@ -226,28 +273,6 @@ impl Stream for Service {
}
}
// check if there are peers to ban
while !self.peers_to_ban.is_empty() {
if self.peers_to_ban[0].1 < Instant::now() {
let (peer_id, _) = self.peers_to_ban.remove(0);
warn!(self.log, "Disconnecting and banning peer"; "peer_id" => format!("{:?}", peer_id));
Swarm::ban_peer_id(&mut self.swarm, peer_id.clone());
// TODO: Correctly notify protocols of the disconnect
// TODO: Also remove peer from the DHT: https://github.com/sigp/lighthouse/issues/629
let dummy_connected_point = ConnectedPoint::Dialer {
address: "/ip4/0.0.0.0"
.parse::<Multiaddr>()
.expect("valid multiaddr"),
};
self.swarm
.inject_disconnected(&peer_id, dummy_connected_point);
// inform the behaviour that the peer has been banned
self.swarm.peer_banned(peer_id);
} else {
break;
}
}
Ok(Async::NotReady)
}
}

2
beacon_node/genesis/Cargo.toml
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@ -19,7 +19,7 @@ merkle_proof = { path = "../../eth2/utils/merkle_proof" }
eth2_ssz = "0.1"
eth2_hashing = { path = "../../eth2/utils/eth2_hashing" }
tree_hash = "0.1"
tokio = "0.1.17"
tokio = "0.1.22"
parking_lot = "0.7"
slog = "^2.2.3"
exit-future = "0.1.4"

2
beacon_node/network/Cargo.toml
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@ -20,7 +20,7 @@ futures = "0.1.29"
error-chain = "0.12.1"
tokio = "0.1.22"
parking_lot = "0.9.0"
smallvec = "0.6.11"
smallvec = "1.0.0"
# TODO: Remove rand crate for mainnet
rand = "0.7.2"
fnv = "1.0.6"

13
beacon_node/network/src/service.rs
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@ -14,6 +14,9 @@ use std::sync::Arc;
use tokio::runtime::TaskExecutor;
use tokio::sync::{mpsc, oneshot};
/// The time in seconds that a peer will be banned and prevented from reconnecting.
const BAN_PEER_TIMEOUT: u64 = 30;
/// Service that handles communication between internal services and the eth2_libp2p network service.
pub struct Service<T: BeaconChainTypes> {
libp2p_service: Arc<Mutex<LibP2PService>>,
@ -212,7 +215,10 @@ fn network_service(
}
}
NetworkMessage::Disconnect { peer_id } => {
libp2p_service.lock().disconnect_and_ban_peer(peer_id);
libp2p_service.lock().disconnect_and_ban_peer(
peer_id,
std::time::Duration::from_secs(BAN_PEER_TIMEOUT),
);
}
},
Ok(Async::NotReady) => break,
@ -235,7 +241,10 @@ fn network_service(
// if we received a Goodbye message, drop and ban the peer
if let RPCEvent::Request(_, RPCRequest::Goodbye(_)) = rpc_event {
locked_service.disconnect_and_ban_peer(peer_id.clone());
locked_service.disconnect_and_ban_peer(
peer_id.clone(),
std::time::Duration::from_secs(BAN_PEER_TIMEOUT),
);
};
message_handler_send
.try_send(HandlerMessage::RPC(peer_id, rpc_event))

2
lighthouse/Cargo.toml
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@ -6,7 +6,7 @@ edition = "2018"
[dependencies]
beacon_node = { "path" = "../beacon_node" }
tokio = "0.1.15"
tokio = "0.1.22"
slog = { version = "^2.2.3" , features = ["max_level_trace"] }
sloggers = "0.3.4"
types = { "path" = "../eth2/types" }

2
lighthouse/environment/Cargo.toml
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@ -5,7 +5,7 @@ authors = ["Paul Hauner <paul@paulhauner.com>"]
edition = "2018"
[dependencies]
tokio = "0.1.15"
tokio = "0.1.22"
slog = { version = "^2.2.3" , features = ["max_level_trace"] }
sloggers = "0.3.4"
types = { "path" = "../../eth2/types" }

2
tests/eth1_test_rig/Cargo.toml
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@ -6,7 +6,7 @@ edition = "2018"
[dependencies]
web3 = "0.8.0"
tokio = "0.1.17"
tokio = "0.1.22"
futures = "0.1.25"
types = { path = "../../eth2/types"}
serde_json = "1.0"

4
validator_client/Cargo.toml
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@ -24,7 +24,7 @@ slog = { version = "2.5.2", features = ["max_level_trace", "release_max_level_tr
slog-async = "2.3.0"
slog-term = "2.4.2"
tokio = "0.1.22"
tokio-timer = "0.2.11"
tokio-timer = "0.2.12"
error-chain = "0.12.1"
bincode = "1.2.0"
futures = "0.1.29"
@ -35,7 +35,7 @@ parking_lot = "0.7"
exit-future = "0.1.4"
libc = "0.2.65"
eth2_ssz_derive = { path = "../eth2/utils/ssz_derive" }
hex = "0.4"
hex = "0.3"
deposit_contract = { path = "../eth2/utils/deposit_contract" }
bls = { path = "../eth2/utils/bls" }
remote_beacon_node = { path = "../eth2/utils/remote_beacon_node" }