protocols/mdns: Removed obsolete lazy static use from mdns (#2977)

Co-authored-by: Max Inden <[email protected]>

Author: umgefahren

protocols/mdns/CHANGELOG.md

@@ -8,8 +8,11 @@
 
 - Fix a bug that could cause a delay of ~10s until peers would get discovered when using the tokio runtime. See [PR 2939].
 
+- Removed the `lazy_static` dependency. See [PR 2977].
+
 [PR 2918]: https://github.com/libp2p/rust-libp2p/pull/2918
 [PR 2939]: https://github.com/libp2p/rust-libp2p/pull/2939
+[PR 2977]: https://github.com/libp2p/rust-libp2p/pull/2977
 
 # 0.40.0
 

protocols/mdns/Cargo.toml

@@ -15,7 +15,6 @@ data-encoding = "2.3.2"
 dns-parser = "0.8.0"
 futures = "0.3.13"
 if-watch = "1.1.1"
-lazy_static = "1.4.0"
 libp2p-core = { version = "0.37.0", path = "../../core" }
 libp2p-swarm = { version = "0.40.0", path = "../../swarm" }
 log = "0.4.14"

protocols/mdns/src/behaviour/iface.rs

@@ -120,8 +120,8 @@ where
             config.query_interval + Duration::from_millis(jitter)
         };
         let multicast_addr = match addr {
-            IpAddr::V4(_) => IpAddr::V4(*crate::IPV4_MDNS_MULTICAST_ADDRESS),
-            IpAddr::V6(_) => IpAddr::V6(*crate::IPV6_MDNS_MULTICAST_ADDRESS),
+            IpAddr::V4(_) => IpAddr::V4(crate::IPV4_MDNS_MULTICAST_ADDRESS),
+            IpAddr::V6(_) => IpAddr::V6(crate::IPV6_MDNS_MULTICAST_ADDRESS),
         };
         Ok(Self {
             addr,

protocols/mdns/src/lib.rs

@@ -30,7 +30,6 @@
 //! implements the `NetworkBehaviour` trait. This struct will automatically discover other
 //! libp2p nodes on the local network.
 //!
-use lazy_static::lazy_static;
 use std::net::{Ipv4Addr, Ipv6Addr};
 use std::time::Duration;
 
@@ -48,11 +47,8 @@ const SERVICE_NAME: &[u8] = b"_p2p._udp.local";
 /// The meta query for looking up the `SERVICE_NAME`.
 const META_QUERY_SERVICE: &[u8] = b"_services._dns-sd._udp.local";
 
-lazy_static! {
-    pub static ref IPV4_MDNS_MULTICAST_ADDRESS: Ipv4Addr = Ipv4Addr::new(224, 0, 0, 251);
-    pub static ref IPV6_MDNS_MULTICAST_ADDRESS: Ipv6Addr =
-        Ipv6Addr::new(0xFF02, 0, 0, 0, 0, 0, 0, 0xFB);
-}
+pub const IPV4_MDNS_MULTICAST_ADDRESS: Ipv4Addr = Ipv4Addr::new(224, 0, 0, 251);
+pub const IPV6_MDNS_MULTICAST_ADDRESS: Ipv6Addr = Ipv6Addr::new(0xFF02, 0, 0, 0, 0, 0, 0, 0xFB);
 
 /// Configuration for mDNS.
 #[derive(Debug, Clone)]