fix(websocket): don't dial /dnsaddr addresses (#5613)

## Description

Returns `Error::InvalidMultiaddr` when `parse_ws_dial_addr` is called
with `/dnsaddr`.

As per its specification, `/dnsaddr` domains are not meant to be
directly dialed, instead it should be appended with `_dnsaddr.` and used
for DNS lookups afterwards

Related: #5529
Fixes: #5601 

## Notes & open questions

* Is it okay to return an error, or should I perform a DNS lookup and
resolve that DNS afterwards if address has `/dnsaddr`?
* If so, how should I handle that case where DNS lookup returns multiple
multiaddrs?

## Change checklist

- [x] I have performed a self-review of my own code
- [ ] I have made corresponding changes to the documentation
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] A changelog entry has been made in the appropriate crates

---------

Co-authored-by: Darius Clark <[email protected]>

Cargo.toml

@@ -112,8 +112,8 @@ libp2p-upnp = { version = "0.3.1", path = "protocols/upnp" }
 libp2p-webrtc = { version = "0.8.0-alpha", path = "transports/webrtc" }
 libp2p-webrtc-utils = { version = "0.3.0", path = "misc/webrtc-utils" }
 libp2p-webrtc-websys = { version = "0.4.0-alpha.2", path = "transports/webrtc-websys" }
-libp2p-websocket = { version = "0.44.0", path = "transports/websocket" }
-libp2p-websocket-websys = { version = "0.4.0", path = "transports/websocket-websys" }
+libp2p-websocket = { version = "0.44.1", path = "transports/websocket" }
+libp2p-websocket-websys = { version = "0.4.1", path = "transports/websocket-websys" }
 libp2p-webtransport-websys = { version = "0.4.0", path = "transports/webtransport-websys" }
 libp2p-yamux = { version = "0.46.0", path = "muxers/yamux" }
 multiaddr = "0.18.1"

transports/websocket-websys/CHANGELOG.md

@@ -1,3 +1,8 @@
+## 0.4.1
+
+- fix: Return `None` when extracting a `/dnsaddr` address
+  See [PR 5613](https://github.com/libp2p/rust-libp2p/pull/5613)
+
 ## 0.4.0
 
 - Implement refactored `Transport`.

transports/websocket-websys/Cargo.toml

@@ -3,7 +3,7 @@ name = "libp2p-websocket-websys"
 edition = "2021"
 rust-version = "1.60.0"
 description = "WebSocket for libp2p under WASM environment"
-version = "0.4.0"
+version = "0.4.1"
 authors = ["Vince Vasta <[email protected]>"]
 license = "MIT"
 repository = "https://github.com/libp2p/rust-libp2p"

transports/websocket-websys/src/lib.rs

@@ -130,8 +130,7 @@ fn extract_websocket_url(addr: &Multiaddr) -> Option<String> {
         }
         (Some(Protocol::Dns(h)), Some(Protocol::Tcp(port)))
         | (Some(Protocol::Dns4(h)), Some(Protocol::Tcp(port)))
-        | (Some(Protocol::Dns6(h)), Some(Protocol::Tcp(port)))
-        | (Some(Protocol::Dnsaddr(h)), Some(Protocol::Tcp(port))) => {
+        | (Some(Protocol::Dns6(h)), Some(Protocol::Tcp(port))) => {
             format!("{}:{}", &h, port)
         }
         _ => return None,
@@ -549,6 +548,12 @@ mod tests {
             .unwrap();
         assert!(extract_websocket_url(&addr).is_none());
 
+        // Check `/dnsaddr`
+        let addr = "/dnsaddr/example.com/tcp/2222/ws"
+            .parse::<Multiaddr>()
+            .unwrap();
+        assert!(extract_websocket_url(&addr).is_none());
+
         // Check non-ws address
         let addr = "/ip4/127.0.0.1/tcp/2222".parse::<Multiaddr>().unwrap();
         assert!(extract_websocket_url(&addr).is_none());

transports/websocket/CHANGELOG.md

@@ -1,3 +1,8 @@
+## 0.44.1
+
+- fix: Return `Error::InvalidMultiaddr` when dialed to a `/dnsaddr` address
+  See [PR 5613](https://github.com/libp2p/rust-libp2p/pull/5613)
+
 ## 0.44.0
 
 - Implement refactored `Transport`.

transports/websocket/Cargo.toml

@@ -3,7 +3,7 @@ name = "libp2p-websocket"
 edition = "2021"
 rust-version = { workspace = true }
 description = "WebSocket transport for libp2p"
-version = "0.44.0"
+version = "0.44.1"
 authors = ["Parity Technologies <[email protected]>"]
 license = "MIT"
 repository = "https://github.com/libp2p/rust-libp2p"

transports/websocket/src/framed.rs

@@ -510,8 +510,7 @@ fn parse_ws_dial_addr<T>(addr: Multiaddr) -> Result<WsAddress, Error<T>> {
             }
             (Some(Protocol::Dns(h)), Some(Protocol::Tcp(port)))
             | (Some(Protocol::Dns4(h)), Some(Protocol::Tcp(port)))
-            | (Some(Protocol::Dns6(h)), Some(Protocol::Tcp(port)))
-            | (Some(Protocol::Dnsaddr(h)), Some(Protocol::Tcp(port))) => {
+            | (Some(Protocol::Dns6(h)), Some(Protocol::Tcp(port))) => {
                 break (format!("{h}:{port}"), tls::dns_name_ref(&h)?)
             }
             (Some(_), Some(p)) => {
@@ -993,6 +992,12 @@ mod tests {
         assert_eq!(info.server_name, "::1".try_into().unwrap());
         assert_eq!(info.tcp_addr, "/ip6/::1/tcp/2222".parse().unwrap());
 
+        // Check `/dnsaddr`
+        let addr = "/dnsaddr/example.com/tcp/2222/ws"
+            .parse::<Multiaddr>()
+            .unwrap();
+        parse_ws_dial_addr::<io::Error>(addr).unwrap_err();
+
         // Check non-ws address
         let addr = "/ip4/127.0.0.1/tcp/2222".parse::<Multiaddr>().unwrap();
         parse_ws_dial_addr::<io::Error>(addr).unwrap_err();