fix(connection): 🐛 Try localhost if broadcast fails, fixes wifi being required for cabled

alvr/client_core/src/connection.rs

@@ -47,7 +47,9 @@ const INITIAL_MESSAGE: &str = concat!(
     "Open ALVR on your PC then click \"Trust\"\n",
     "next to the client entry",
 );
-const NETWORK_UNREACHABLE_MESSAGE: &str = "Cannot connect to the internet";
+const NETWORK_UNREACHABLE_MESSAGE: &str = "Cannot connect to the streamer.\nNetwork error.";
+const SUCCESS_CONNECT_MESSAGE: &str = "Successful connection!\nPlease wait...";
+const LOCAL_TRY_MESSAGE: &str = "Trying to connect to localhost...";
 // const INCOMPATIBLE_VERSIONS_MESSAGE: &str = concat!(
 //     "Streamer and client have\n",
 //     "incompatible types.\n",
@@ -135,24 +137,32 @@ fn connection_pipeline(
                 return Ok(());
             }
 
-            if let Err(e) = announcer_socket.broadcast() {
-                warn!("Broadcast error: {e:?}");
+            let mut is_broadcast_ok = false;
+            if let Err(e) = announcer_socket.announce_broadcast() {
+                debug!("Couldn't announce to localhost, retrying on local... {e:}");
 
-                set_hud_message(NETWORK_UNREACHABLE_MESSAGE);
-
-                thread::sleep(RETRY_CONNECT_MIN_INTERVAL);
-
-                set_hud_message(INITIAL_MESSAGE);
-
-                return Ok(());
+                set_hud_message(LOCAL_TRY_MESSAGE);
+            } else {
+                is_broadcast_ok = true;
             }
 
             if let Ok(pair) = ProtoControlSocket::connect_to(
                 DISCOVERY_RETRY_PAUSE,
                 PeerType::Server(&listener_socket),
             ) {
+                set_hud_message(SUCCESS_CONNECT_MESSAGE);
                 break pair;
             }
+
+            if !is_broadcast_ok {
+                warn!("Couldn't announce to network or connect to localhost.");
+                set_hud_message(NETWORK_UNREACHABLE_MESSAGE);
+
+                thread::sleep(RETRY_CONNECT_MIN_INTERVAL);
+
+                set_hud_message(INITIAL_MESSAGE);
+                return Ok(());
+            }
         }
     };
 

alvr/client_core/src/sockets.rs

@@ -20,7 +20,7 @@ impl AnnouncerSocket {
         Ok(Self { socket, packet })
     }
 
-    pub fn broadcast(&self) -> Result<()> {
+    pub fn announce_broadcast(&self) -> Result<()> {
         self.socket
             .send_to(&self.packet, (Ipv4Addr::BROADCAST, CONTROL_PORT))?;
 

wiki/Use-ALVR-through-a-USB-connection.md

@@ -10,7 +10,6 @@
 
 * If your headset is detected, click "Trust." Click "Edit", "Add new" and change the IP address to `127.0.0.1`.
 * If your headset is not detected, click "Add client manually" and use the IP address `127.0.0.1`. Use the hostname displayed on your headset screen.
-* Turn off client discovery in Settings > Connection.
 * Switch the connection streaming protocol to TCP in Settings > Connection.
 
 ## Letting your PC communicate with your HMD