Bug trying to opening the UDP Socket after WiFi connection in Android

Description

Android bug. After a new Wi-Fi connection with react-native-wifi-reborn, if you open a new udp socket all seems to work but the method onMessage doesn't receive data.

NOTE: If you open the udp socket before the Wi-Fi connection it works as expected. I suspect it may be related to the fact that the connection wifi-reborn makes is an "app-wifi" and not a "system-wifi" connection when using WifiNetworkSpecifier class.

Could help

Opening the udp socket once we create a Wifi (peer to peer) connection with wifiNetworkSpecifier (react-native-wifi-reborn) we can see this log in Android debug console:

WifiService setWifiEnabled not allowed for uid=10350

Opening the udp socket before Wifi connection with wifiNetworkSpecifier (react-native-wifi-reborn) we don't get this error.

Steps to reproduce

Steps to reproduce the behavior:

Use react-native-wifi-reborn and connect to a Wi-Fi network (which has service announcement udp socket)
After that, create a new udp socket connection
See how onMessage method is not receiving packages...

Or code:

const connectAndOpenUDPSocket = async () => {
  await WifiManager.connectToProtectedSSID(
    networkDetails.ssid,
    networkDetails.passphrase,
    false,
  ).then(
    () => {
      // success
    },
    () => {
      // failed
      throw new Error('Not connected')
    }
  );

  try {
    nsdSocket = dgram.createSocket({ type: 'udp4', reusePort: true});
    nsdSocket.bind({ port: MULTICAST_PORT });
    nsdSocket.once('listening', () => {
      nsdSocket?.addMembership(MULTICAST_GROUP_ADDRESS);
    });

    nsdSocket.on('error', error => {
      // The network was lost.
      if (nsdSocket) {
        nsdSocket.close();
      }
    });

    nsdSocket.on('close', () => {
      // The network was lost.
      nsdSocket = undefined;
    });

    nsdSocket.on('message', async msg => {
      // Do something
      // In Android this method is not receiving data if we open the udp socket after wifi connection
    });
  } catch (error) {
    console.log(error);
  }
};

Current behavior

Android: Opening UDP Socket before wifi connection all works. Opening UDP Socket after wifi connection all seems to work but onMessage don't receive data.

iOS: (iOS works in both cases)

Expected behavior

If we open a UDP Socket after wifi connection it should work.

Relevant information


OS	Android
react-native	0.64
react-native-udp	4.1.7

tradle / react-native-udp