Revert network unreachable detection

protocols/autonat/Cargo.toml

@@ -31,7 +31,6 @@ rand = "0.8"
 rand_core = { version = "0.6", optional = true }
 thiserror = { version = "1.0.52", optional = true }
 void = { version = "1", optional = true }
-libc = { version = "0.2", optional = true }
 
 [dev-dependencies]
 tokio = { version = "1", features = ["macros", "rt", "sync"]}
@@ -44,8 +43,7 @@ libp2p-swarm = { workspace = true, features = ["macros"]}
 [features]
 default = ["v1", "v2"]
 v1 = ["dep:libp2p-request-response"]
-v2 = ["dep:bytes", "dep:either", "dep:futures-bounded", "dep:thiserror", "dep:void",
-    "dep:rand_core", "dep:libc"]
+v2 = ["dep:bytes", "dep:either", "dep:futures-bounded", "dep:thiserror", "dep:void", "dep:rand_core"]
 
 [lints]
 workspace = true

protocols/autonat/src/v2/server/behaviour.rs

@@ -94,24 +94,11 @@ where
     }
 
     fn on_swarm_event(&mut self, event: FromSwarm) {
-        if let FromSwarm::DialFailure(DialFailure {
-            connection_id,
-            error,
-            ..
-        }) = event
-        {
+        if let FromSwarm::DialFailure(DialFailure { connection_id, .. }) = event {
             if let Some(DialBackCommand { back_channel, .. }) =
                 self.dialing_dial_back.remove(&connection_id)
             {
-                let dial_back_status = if let DialError::Transport(errors) = error {
-                    if errors.iter().any(|(_, e)| matches!(e, TransportError::Other(ie) if is_network_unreachable(ie))) {
-                        DialBackStatus::Unreachable
-                    } else {
-                        DialBackStatus::DialErr
-                    }
-                } else {
-                    DialBackStatus::DialErr
-                };
+                let dial_back_status = DialBackStatus::DialErr;
                 let _ = back_channel.send(Err(dial_back_status));
             }
         }
@@ -170,15 +157,3 @@ pub struct Event {
     /// The result of the test.
     pub result: Result<(), io::Error>,
 }
-
-#[cfg(not(all(target_family = "wasm", target_os = "unknown")))]
-fn is_network_unreachable(err: &io::Error) -> bool {
-    err.raw_os_error()
-        .map(|e| e == libc::ENETUNREACH)
-        .unwrap_or(false)
-}
-
-#[cfg(all(target_family = "wasm", target_os = "unknown"))]
-fn is_network_unreachable(_err: &io::Error) -> bool {
-    false
-}