fix(network): do not log connection error if the peer has multiple tr…

…ansports

sn_networking/src/driver.rs

@@ -64,7 +64,7 @@ use std::{
     fmt::Debug,
     fs,
     io::{Read, Write},
-    net::SocketAddr,
+    net::{IpAddr, SocketAddr},
     num::NonZeroUsize,
     path::PathBuf,
 };
@@ -721,7 +721,7 @@ impl NetworkBuilder {
             network_discovery: NetworkDiscovery::new(&peer_id),
             bootstrap_peers: Default::default(),
             live_connected_peers: Default::default(),
-            latest_connected_peers: Default::default(),
+            latest_established_connection_ids: Default::default(),
             handling_statistics: Default::default(),
             handled_times: 0,
             hard_disk_write_error: 0,
@@ -820,10 +820,9 @@ pub struct SwarmDriver {
     // Peers that having live connection to. Any peer got contacted during kad network query
     // will have live connection established. And they may not appear in the RT.
     pub(crate) live_connected_peers: BTreeMap<ConnectionId, (PeerId, Instant)>,
-    /// The peers that we recently connected to.
-    /// This is a limited list used to prevent log spamming.
-    /// Use `live_connected_peers` for a full list.
-    pub(crate) latest_connected_peers: HashMap<Multiaddr, Instant>,
+    /// The list of recently established connections ids.
+    /// This is used to prevent log spamming.
+    pub(crate) latest_established_connection_ids: HashMap<usize, (IpAddr, Instant)>,
     // Record the handling time of the recent 10 for each handling kind.
     handling_statistics: BTreeMap<String, Vec<Duration>>,
     handled_times: usize,
@@ -885,13 +884,16 @@ impl SwarmDriver {
                 },
                 // next take and react to external swarm events
                 swarm_event = self.swarm.select_next_some() => {
-
                     // Refer to the handle_swarm_events::IncomingConnectionError for more info on why we skip
                     // processing the event for one round.
                     if let Some(previous_event) = previous_incoming_connection_error_event.take() {
+                        if let Err(err) = self.handle_swarm_events(swarm_event) {
+                            warn!("Error while handling swarm event: {err}");
+                        }
                         if let Err(err) = self.handle_swarm_events(previous_event) {
                             warn!("Error while handling swarm event: {err}");
                         }
+                        continue;
                     }
                     if matches!(swarm_event, SwarmEvent::IncomingConnectionError {..}) {
                         previous_incoming_connection_error_event = Some(swarm_event);

sn_networking/src/event/swarm.rs

@@ -7,8 +7,8 @@
 // permissions and limitations relating to use of the SAFE Network Software.
 
 use crate::{
-    event::NodeEvent, multiaddr_is_global, multiaddr_strip_p2p, relay_manager::is_a_relayed_peer,
-    target_arch::Instant, NetworkEvent, Result, SwarmDriver,
+    event::NodeEvent, multiaddr_get_ip, multiaddr_is_global, multiaddr_strip_p2p,
+    relay_manager::is_a_relayed_peer, target_arch::Instant, NetworkEvent, Result, SwarmDriver,
 };
 #[cfg(feature = "local")]
 use libp2p::mdns;
@@ -19,7 +19,7 @@ use libp2p::{
     multiaddr::Protocol,
     swarm::{
         dial_opts::{DialOpts, PeerCondition},
-        DialError, SwarmEvent,
+        ConnectionId, DialError, SwarmEvent,
     },
     Multiaddr, PeerId, TransportError,
 };
@@ -364,7 +364,10 @@ impl SwarmDriver {
                     connection_id,
                     (peer_id, Instant::now() + Duration::from_secs(60)),
                 );
-                self.insert_latest_connected_peers(endpoint.get_remote_address().clone());
+                self.insert_latest_established_connection_ids(
+                    connection_id,
+                    endpoint.get_remote_address(),
+                );
                 self.record_connection_metrics();
 
                 if endpoint.is_dialer() {
@@ -381,9 +384,6 @@ impl SwarmDriver {
                 event_string = "ConnectionClosed";
                 debug!(%peer_id, ?connection_id, ?cause, num_established, "ConnectionClosed: {}", endpoint_str(&endpoint));
                 let _ = self.live_connected_peers.remove(&connection_id);
-                let _ = self
-                    .latest_connected_peers
-                    .remove(endpoint.get_remote_address());
                 self.record_connection_metrics();
             }
             SwarmEvent::OutgoingConnectionError {
@@ -513,7 +513,9 @@ impl SwarmDriver {
                 error,
             } => {
                 event_string = "Incoming ConnErr";
-                // Only log if this for a non-existing connection.
+                // Only log as ERROR if the the connection is not adjacent to an already established connection id from
+                // the same IP address.
+                //
                 // If a peer contains multiple transports/listen addrs, we might try to open multiple connections,
                 // and if the first one passes, we would get error on the rest. We don't want to log these.
                 //
@@ -522,8 +524,10 @@ impl SwarmDriver {
                 // giving time for ConnectionEstablished to be hopefully processed.
                 // And since we don't do anything critical with this event, the order and time of processing is
                 // not critical.
-                if !self.latest_connected_peers.contains_key(&send_back_addr) {
+                if self.should_we_log_incoming_connection_error(connection_id, &send_back_addr) {
                     error!("IncomingConnectionError from local_addr:?{local_addr:?}, send_back_addr {send_back_addr:?} on {connection_id:?} with error {error:?}");
+                } else {
+                    debug!("IncomingConnectionError from local_addr:?{local_addr:?}, send_back_addr {send_back_addr:?} on {connection_id:?} with error {error:?}");
                 }
                 let _ = self.live_connected_peers.remove(&connection_id);
                 self.record_connection_metrics();
@@ -675,29 +679,61 @@ impl SwarmDriver {
         }
     }
 
-    /// Insert into the latest connected peers list. This list does not contain all the connected peers.
-    /// Older entries are removed if the list exceeds 50.
-    fn insert_latest_connected_peers(&mut self, addr: Multiaddr) {
-        let old_instant = self
-            .latest_connected_peers
-            .entry(addr)
-            .or_insert_with(Instant::now);
-        *old_instant = Instant::now();
+    /// Insert the latest established connection id into the list.
+    fn insert_latest_established_connection_ids(&mut self, id: ConnectionId, addr: &Multiaddr) {
+        let Ok(id) = format!("{id}").parse::<usize>() else {
+            return;
+        };
+        let Some(ip_addr) = multiaddr_get_ip(addr) else {
+            return;
+        };
+
+        let _ = self
+            .latest_established_connection_ids
+            .insert(id, (ip_addr, Instant::now()));
 
-        while self.latest_connected_peers.len() >= 50 {
+        while self.latest_established_connection_ids.len() >= 50 {
             // remove the oldest entry
-            let Some(oldest) = self
-                .latest_connected_peers
+            let Some(oldest_key) = self
+                .latest_established_connection_ids
                 .iter()
-                .min_by_key(|(_, time)| *time)
-                .map(|(addr, _)| addr.clone())
+                .min_by_key(|(_, (_, time))| *time)
+                .map(|(id, _)| *id)
             else {
                 break;
             };
 
-            self.latest_connected_peers.remove(&oldest);
+            self.latest_established_connection_ids.remove(&oldest_key);
         }
     }
+
+    // Do not log IncomingConnectionError if the ConnectionId is adjacent to an already established connection.
+    fn should_we_log_incoming_connection_error(&self, id: ConnectionId, addr: &Multiaddr) -> bool {
+        let Ok(id) = format!("{id}").parse::<usize>() else {
+            return true;
+        };
+        let Some(ip_addr) = multiaddr_get_ip(addr) else {
+            return true;
+        };
+
+        // This should prevent most of the cases where we get an IncomingConnectionError for a peer with multiple
+        // transports/listen addrs.
+        if let Some((established_ip_addr, _)) =
+            self.latest_established_connection_ids.get(&(id - 1))
+        {
+            if established_ip_addr == &ip_addr {
+                return false;
+            }
+        } else if let Some((established_ip_addr, _)) =
+            self.latest_established_connection_ids.get(&(id + 1))
+        {
+            if established_ip_addr == &ip_addr {
+                return false;
+            }
+        }
+
+        true
+    }
 }
 
 /// Helper function to print formatted connection role info.