...

packages/core/lib/network/network_manager.dart

@@ -75,6 +75,15 @@ class NetworkManager extends ChangeNotifier {
       int port = _serverSocket!.port;
       print('[Host] Server opened on port: $port');
 
+final interfaces = await NetworkInterface.list(type: InternetAddressType.IPv4);
+  String myIp = '127.0.0.1';
+  try {
+    // 보통 wlan0 혹은 en0가 와이파이 인터페이스
+    myIp = interfaces.firstWhere((i) => i.name != 'lo').addresses.first.address;
+  } catch (e) {
+    print('IP search failed: $e');
+  }
+
       // B. 게스트 접속 대기
       _serverSocket!.listen((Socket client) {
         _handleNewGuest(client);
@@ -87,6 +96,7 @@ class NetworkManager extends ChangeNotifier {
         name: '$roomName#${me.id}', 
         type: '_playwith._tcp',
         port: port,
+        attributes: {'ip': myIp},
       );
 
       _bonsoirBroadcast = BonsoirBroadcast(service: _bonsoirService!);