refactor(dns): unify symbol naming

Renamed the following
- `dns::GenDnsConfig`  ->  `dns::Config`
- `dns::DnsConfig` -> `dns::async_std::Config`
- `dns::TokioDnsConfig` -> `dns::tokio::Config`

If async-std feature is enable, use `dns::async_std::Config`. When using tokio, import `dns::tokio::Config` . There is no need to use `dns::Config` directly.

Resolves #4486.
Related: #2217.

Pull-Request: #4505.

Cargo.toml

@@ -78,7 +78,7 @@ libp2p-connection-limits = { version = "0.2.1", path = "misc/connection-limits"
 libp2p-core = { version = "0.40.1", path = "core" }
 libp2p-dcutr = { version = "0.10.0", path = "protocols/dcutr" }
 libp2p-deflate = { version = "0.40.0", path = "transports/deflate" }
-libp2p-dns = { version = "0.40.0", path = "transports/dns" }
+libp2p-dns = { version = "0.40.1", path = "transports/dns" }
 libp2p-floodsub = { version = "0.43.0", path = "protocols/floodsub" }
 libp2p-gossipsub = { version = "0.45.1", path = "protocols/gossipsub" }
 libp2p-identify = { version = "0.43.0", path = "protocols/identify" }

examples/dcutr/src/main.rs

@@ -33,9 +33,7 @@ use libp2p::{
         transport::Transport,
         upgrade,
     },
-    dcutr,
-    dns::DnsConfig,
-    identify, identity, noise, ping, quic, relay,
+    dcutr, dns, identify, identity, noise, ping, quic, relay,
     swarm::{NetworkBehaviour, SwarmBuilder, SwarmEvent},
     tcp, yamux, PeerId,
 };
@@ -102,7 +100,7 @@ fn main() -> Result<(), Box<dyn Error>> {
                 &local_key,
             )));
 
-        block_on(DnsConfig::system(relay_tcp_quic_transport))
+        block_on(dns::async_std::Transport::system(relay_tcp_quic_transport))
             .unwrap()
             .map(|either_output, _| match either_output {
                 Either::Left((peer_id, muxer)) => (peer_id, StreamMuxerBox::new(muxer)),

libp2p/src/lib.rs

@@ -189,12 +189,12 @@ pub async fn development_transport(
     keypair: identity::Keypair,
 ) -> std::io::Result<core::transport::Boxed<(PeerId, core::muxing::StreamMuxerBox)>> {
     let transport = {
-        let dns_tcp = dns::DnsConfig::system(tcp::async_io::Transport::new(
+        let dns_tcp = dns::async_std::Transport::system(tcp::async_io::Transport::new(
             tcp::Config::new().nodelay(true),
         ))
         .await?;
         let ws_dns_tcp = websocket::WsConfig::new(
-            dns::DnsConfig::system(tcp::async_io::Transport::new(
+            dns::async_std::Transport::system(tcp::async_io::Transport::new(
                 tcp::Config::new().nodelay(true),
             ))
             .await?,
@@ -234,10 +234,10 @@ pub fn tokio_development_transport(
     keypair: identity::Keypair,
 ) -> std::io::Result<core::transport::Boxed<(PeerId, core::muxing::StreamMuxerBox)>> {
     let transport = {
-        let dns_tcp = dns::TokioDnsConfig::system(tcp::tokio::Transport::new(
+        let dns_tcp = dns::tokio::Transport::system(tcp::tokio::Transport::new(
             tcp::Config::new().nodelay(true),
         ))?;
-        let ws_dns_tcp = websocket::WsConfig::new(dns::TokioDnsConfig::system(
+        let ws_dns_tcp = websocket::WsConfig::new(dns::tokio::Transport::system(
             tcp::tokio::Transport::new(tcp::Config::new().nodelay(true)),
         )?);
         dns_tcp.or_transport(ws_dns_tcp)

misc/server/src/main.rs

@@ -88,7 +88,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
 
         let quic_transport = quic::tokio::Transport::new(quic::Config::new(&local_keypair));
 
-        dns::TokioDnsConfig::system(libp2p::core::transport::OrTransport::new(
+        dns::tokio::Transport::system(libp2p::core::transport::OrTransport::new(
             quic_transport,
             tcp_transport,
         ))?

protocols/perf/src/bin/perf.rs

@@ -405,7 +405,7 @@ async fn swarm<B: NetworkBehaviour + Default>() -> Result<Swarm<B>> {
             libp2p_quic::tokio::Transport::new(config)
         };
 
-        let dns = libp2p_dns::TokioDnsConfig::system(OrTransport::new(quic, tcp))?;
+        let dns = libp2p_dns::tokio::Transport::system(OrTransport::new(quic, tcp))?;
 
         dns.map(|either_output, _| match either_output {
             Either::Left((peer_id, muxer)) => (peer_id, StreamMuxerBox::new(muxer)),

transports/dns/CHANGELOG.md

@@ -1,3 +1,11 @@
+## 0.40.1 - unreleased
+
+- Remove `Dns` prefix from types like `TokioDnsConfig` and `DnsConfig` in favor of modules that describe the different variants.
+  Users are encouraged to import the `libp2p::dns` module and refer to types as `dns::tokio::Transport` and `dns::async_std::Transport`.
+  See [PR 4505].
+
+[PR 4505]: https://github.com/libp2p/rust-libp2p/pull/4505
+
 ## 0.40.0 
 
 - Raise MSRV to 1.65.

transports/dns/Cargo.toml

@@ -3,7 +3,7 @@ name = "libp2p-dns"
 edition = "2021"
 rust-version = { workspace = true }
 description = "DNS transport implementation for libp2p"
-version = "0.40.0"
+version = "0.40.1"
 authors = ["Parity Technologies <admin@parity.io>"]
 license = "MIT"
 repository = "https://github.com/libp2p/rust-libp2p"
@@ -35,7 +35,7 @@ tokio = ["trust-dns-resolver/tokio-runtime"]
 tokio-dns-over-rustls = ["tokio", "trust-dns-resolver/dns-over-rustls"]
 tokio-dns-over-https-rustls = ["tokio", "trust-dns-resolver/dns-over-https-rustls"]
 
-# Passing arguments to the docsrs builder in order to properly document cfg's. 
+# Passing arguments to the docsrs builder in order to properly document cfg's.
 # More information: https://docs.rs/about/builds#cross-compiling
 [package.metadata.docs.rs]
 all-features = true