How to receive broadcast message in Unity?

Question

I am trying to get the broadcasted message in overridden method of NetworkDiscovery.OnReceivedBroadcast(). For that what I had done is below:

1. I create class which implements NetworkDiscovery where I override the method OnReceivedBroadcast() to capture the broadcast messages.
2. In Unity Editor, I created an empty GameObject where I add the class in step #1 as component.

Now in code, I started the custom NetworkDiscovery class as below:

Discovery.Initialize();
Discovery.StartAsClient();

Now, when I start the broadcast in server, I am not receiving any broadcast message in OnReceivedBroadcast().

Below is my custom NetworkDiscovery class.

public class CustomNetworkDiscovery : NetworkDiscovery
{

// Use this for initialization
void Start()
{

}

// Update is called once per frame
void Update()
{

}

public override void OnReceivedBroadcast(string fromAddress, string data)
{
    base.OnReceivedBroadcast(fromAddress, data);
}
}

One thing I noted is, If I use the NetworkDiscovery component directly in step #2; instead of using custom NetworkDiscovery class. I am able to see broadcast messages in it's default GUI.

How can I receive the broadcast message in the inherited class?

Any help will be appreciated. Thanks.

Answer 1

I had the same problem. Turns out the class that inherits from NetworkDiscovery is not allowed to have it's own Update() function.

Answer 2

I suggest to use source code of the network discovery. In their script there is a void OnGUI() method that controls the GUI control.

Answer 3

I have the same issue but I solved it by un-checking the "Use NetworkManager" and add anything in the broadcast data. I can pass now any data inside my script like

discovery.broadcastData = "Hello World"

The only problem is you can only broadcast data at once. right after that you are unable to update the broadcasted message

Answer 4

Refer this thread for solution http://forum.unity3d.com/threads/onreceivedbroadcast-doesnt-supply-port-number.381833/