fix(relay): malformed reported relayed addr when relay peer is dialer

Cargo.toml

@@ -97,7 +97,7 @@ libp2p-ping = { version = "0.45.0", path = "protocols/ping" }
 libp2p-plaintext = { version = "0.42.0", path = "transports/plaintext" }
 libp2p-pnet = { version = "0.25.0", path = "transports/pnet" }
 libp2p-quic = { version = "0.11.1", path = "transports/quic" }
-libp2p-relay = { version = "0.18.0", path = "protocols/relay" }
+libp2p-relay = { version = "0.18.1", path = "protocols/relay" }
 libp2p-rendezvous = { version = "0.15.0", path = "protocols/rendezvous" }
 libp2p-request-response = { version = "0.27.0", path = "protocols/request-response" }
 libp2p-server = { version = "0.12.7", path = "misc/server" }

protocols/relay/CHANGELOG.md

@@ -1,3 +1,8 @@
+## 0.18.1
+
+- Fix malformed reported relayed address when relay peer was dialer.
+  See [PR 5576](https://github.com/libp2p/rust-libp2p/pull/5576).
+
 ## 0.18.0
 
 <!-- Update to libp2p-swarm v0.45.0 -->

protocols/relay/Cargo.toml

@@ -3,7 +3,7 @@ name = "libp2p-relay"
 edition = "2021"
 rust-version = { workspace = true }
 description = "Communications relaying for libp2p"
-version = "0.18.0"
+version = "0.18.1"
 authors = ["Parity Technologies <[email protected]>", "Max Inden <[email protected]>"]
 license = "MIT"
 repository = "https://github.com/libp2p/rust-libp2p"

protocols/relay/src/priv_client.rs

@@ -164,7 +164,15 @@ impl NetworkBehaviour for Behaviour {
         if local_addr.is_relayed() {
             return Ok(Either::Right(dummy::ConnectionHandler));
         }
-        let mut handler = Handler::new(self.local_peer_id, peer, remote_addr.clone());
+
+        let mut handler = match remote_addr.clone().with_p2p(peer) {
+            Ok(remote_addr) => Handler::new(self.local_peer_id, peer, remote_addr),
+            Err(remote_addr) => {
+                return Err(ConnectionDenied::new(format!(
+                    "addr {remote_addr} contains a PeerId not matching {peer}"
+                )))
+            }
+        };
 
         if let Some(event) = self.pending_handler_commands.remove(&connection_id) {
             handler.on_behaviour_event(event)