Emulator

Update: Android is able to play with real console. Windows is not.

Both of them can connect to my Android phone, however, my Android phone will see "3" GameCubes together, where as the desktop and GameCube see 2 GameCubes.

This appears to be a separate bug than the Kirby Air Ride bug, as Kirby Air Ride still can't connect to Android against Real Console.

AFAICT, it can't work on console. The BuiltIn adapter uses broadcast (255.255.255.255) to simulate SSDP advertisement/discovery whereas the real console uses multicast (239.255.255.250). In sum, the GC can see both SSDP broadcasts and multicasts but Dolphin can only see broadcasts. By implementing multicast properly and not using broadcast this should fix the issue I think.

I believe the reason why a GC can talk to one instance of Dolphin is the UDP port that we open in advance.

After giving it another thought, I suspect the MAC address filtering on real console to prevent Dolphin (BBA HLE) to interact with them. BBA HLE spoofs MAC addresses within Dolphin instances not the other devices on the network.

Nintendont also have BBA issues with real consoles, I'm unsure if it's related.

• https://github.com/FIX94/Nintendont/blob/master/BBA_Readme.md (the mention of Dolphin most likely refers to Dolphin using TAP which uses a valid BBA MAC address).