Update cuckoofilter requirement from 0.3.2 to 0.5.0 (#1763)

* Update cuckoofilter requirement from 0.3.2 to 0.5.0

Updates the requirements on [cuckoofilter](https://github.com/axiomhq/rust-cuckoofilter) to permit the latest version.
- [Release notes](https://github.com/axiomhq/rust-cuckoofilter/releases)
- [Changelog](https://github.com/axiomhq/rust-cuckoofilter/blob/master/CHANGELOG.md)
- [Commits](https://github.com/axiomhq/rust-cuckoofilter/commits)

Signed-off-by: dependabot[bot] <support@github.com>

* protocols/floodsub: Warn when Cuckoofilter has to evict item

With Cuckoofilter `v0.4.0` `add` and `test_and_add` return an error when
an old element has to be evicted in favor of a new one to take its
place. The previous behavior was panicing.

With this commit the error is logged on `warn` level.

* *: Update changelogs and cargo tomls

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Max Inden <mail@max-inden.de>

CHANGELOG.md

@@ -25,9 +25,9 @@
 
 # Version 0.29.0 [unreleased]
 
-- Update `libp2p-core`, `libp2p-gossipsub`, `libp2p-mplex`, `libp2p-noise`,
-  `libp2p-plaintext`, `libp2p-request-response`, `libp2p-websocket` and
-  `parity-multiaddr`.
+- Update `libp2p-core`, `libp2p-floodsub`, `libp2p-gossipsub`, `libp2p-mplex`,
+  `libp2p-noise`, `libp2p-plaintext`, `libp2p-request-response`,
+  `libp2p-websocket` and `parity-multiaddr`.
 
 # Version 0.28.1 [2020-09-10]
 

Cargo.toml

@@ -64,7 +64,7 @@ futures = "0.3.1"
 lazy_static = "1.2"
 libp2p-core = { version = "0.22.2", path = "core" }
 libp2p-core-derive = { version = "0.20.2", path = "misc/core-derive" }
-libp2p-floodsub = { version = "0.22.0", path = "protocols/floodsub", optional = true }
+libp2p-floodsub = { version = "0.23.0", path = "protocols/floodsub", optional = true }
 libp2p-gossipsub = { version = "0.22.1", path = "./protocols/gossipsub", optional = true }
 libp2p-identify = { version = "0.22.0", path = "protocols/identify", optional = true }
 libp2p-kad = { version = "0.23.1", path = "protocols/kad", optional = true }

protocols/floodsub/CHANGELOG.md

@@ -1,3 +1,7 @@
+# 0.23.0 [unreleased]
+
+- Update dependencies.
+
 # 0.22.0 [2020-09-09]
 
 - Update `libp2p-swarm` and `libp2p-core`.

protocols/floodsub/Cargo.toml

@@ -2,7 +2,7 @@
 name = "libp2p-floodsub"
 edition = "2018"
 description = "Floodsub protocol for libp2p"
-version = "0.22.0"
+version = "0.23.0"
 authors = ["Parity Technologies <admin@parity.io>"]
 license = "MIT"
 repository = "https://github.com/libp2p/rust-libp2p"
@@ -10,11 +10,12 @@ keywords = ["peer-to-peer", "libp2p", "networking"]
 categories = ["network-programming", "asynchronous"]
 
 [dependencies]
-cuckoofilter = "0.3.2"
+cuckoofilter = "0.5.0"
 fnv = "1.0"
 futures = "0.3.1"
 libp2p-core = { version = "0.22.0", path = "../../core" }
 libp2p-swarm = { version = "0.22.0", path = "../../swarm" }
+log = "0.4"
 prost = "0.6.1"
 rand = "0.7"
 smallvec = "1.0"

protocols/floodsub/src/layer.rs

@@ -21,7 +21,7 @@
 use crate::protocol::{FloodsubProtocol, FloodsubMessage, FloodsubRpc, FloodsubSubscription, FloodsubSubscriptionAction};
 use crate::topic::Topic;
 use crate::FloodsubConfig;
-use cuckoofilter::CuckooFilter;
+use cuckoofilter::{CuckooError, CuckooFilter};
 use fnv::FnvHashSet;
 use libp2p_core::{Multiaddr, PeerId, connection::ConnectionId};
 use libp2p_swarm::{
@@ -33,6 +33,7 @@ use libp2p_swarm::{
     NotifyHandler,
     DialPeerCondition,
 };
+use log::warn;
 use rand;
 use smallvec::SmallVec;
 use std::{collections::VecDeque, iter};
@@ -206,7 +207,12 @@ impl Floodsub {
 
         let self_subscribed = self.subscribed_topics.iter().any(|t| message.topics.iter().any(|u| t == u));
         if self_subscribed {
-            self.received.add(&message);
+            if let Err(e @ CuckooError::NotEnoughSpace) = self.received.add(&message) {
+                warn!(
+                    "Message was added to 'received' Cuckoofilter but some \
+                     other message was removed as a consequence: {}", e,
+                );
+            }
             if self.config.subscribe_local_messages {
                 self.events.push_back(
                     NetworkBehaviourAction::GenerateEvent(FloodsubEvent::Message(message.clone())));
@@ -327,9 +333,16 @@ impl NetworkBehaviour for Floodsub {
 
         for message in event.messages {
             // Use `self.received` to skip the messages that we have already received in the past.
-            // Note that this can false positive.
-            if !self.received.test_and_add(&message) {
-                continue;
+            // Note that this can result in false positives.
+            match self.received.test_and_add(&message) {
+                Ok(true) => {}, // Message  was added.
+                Ok(false) => continue, // Message already existed.
+                Err(e @ CuckooError::NotEnoughSpace) => { // Message added, but some other removed.
+                    warn!(
+                        "Message was added to 'received' Cuckoofilter but some \
+                         other message was removed as a consequence: {}", e,
+                    );
+                }
             }
 
             // Add the message to be dispatched to the user.