WebGL P2P with Relay - join code not found

Unity Services
,
1

The host is working but my client is not able to find the join code.

using System;
using System.Threading.Tasks;
using UnityEngine;
using Unity.Services.Core;
using Unity.Services.Authentication;
using Unity.Services.Relay;
using Unity.Services.Relay.Models;
using Unity.Netcode;
using Unity.Netcode.Transports.UTP;
using Unity.Networking.Transport.Relay;
using TMPro;

public class TestRelay : MonoBehaviour
{
[SerializeField] private TextMeshProUGUI joinCodeText;
[SerializeField] private TMP_InputField joinCodeInputField;

public async void StartRelay()
{
    try
    {
        string joinCode = await StartHostWithRelay();
        if (!string.IsNullOrEmpty(joinCode))
        {
            joinCodeText.text = joinCode;
            Debug.Log($"Relay started. Join code: {joinCode}");
        }
        else
        {
            Debug.LogError("Failed to start relay. Join code is null or empty.");
        }
    }
    catch (Exception e)
    {
        Debug.LogError($"Failed to start relay: {e.Message}");
    }
}

public async void JoinRelay()
{
    try
    {
        string joinCode = joinCodeInputField.text;
        Debug.Log($"Attempting to join relay with code: {joinCode}");

        if (string.IsNullOrEmpty(joinCode))
        {
            Debug.LogError("Join code is empty. Please enter a valid join code.");
            return;
        }

        bool result = await StartClientWithRelay(joinCode);
        if (result)
        {
            Debug.Log("Client connected successfully.");
        }
        else
        {
            Debug.LogError("Client failed to connect.");
        }
    }
    catch (Exception e)
    {
        Debug.LogError($"Failed to join relay: {e.Message}");
    }
}

public async Task<string> StartHostWithRelay(int maxConnections = 5)
{
    await UnityServices.InitializeAsync();
    if (!AuthenticationService.Instance.IsSignedIn)
    {
        await AuthenticationService.Instance.SignInAnonymouslyAsync();
    }
    Allocation allocation = await RelayService.Instance.CreateAllocationAsync(maxConnections);

    //NetworkManager.Singleton.GetComponent<UnityTransport>().SetRelayServerData(new RelayServerData(allocation, "dtls"));

    //for webgl (dont forget to check in unity tranpsort (networkmanager) websockets
    var unityTransport = NetworkManager.Singleton.GetComponent<UnityTransport>();
    unityTransport.SetRelayServerData(new RelayServerData(allocation, "wss"));
    unityTransport.UseWebSockets = true;


    var joinCode = await RelayService.Instance.GetJoinCodeAsync(allocation.AllocationId);
    return NetworkManager.Singleton.StartHost() ? joinCode : null;
}

public async Task<bool> StartClientWithRelay(string joinCode)
{
    await UnityServices.InitializeAsync();
    if (!AuthenticationService.Instance.IsSignedIn)
    {
        await AuthenticationService.Instance.SignInAnonymouslyAsync();
    }

    var joinAllocation = await RelayService.Instance.JoinAllocationAsync(joinCode: joinCode);


    //NetworkManager.Singleton.GetComponent<UnityTransport>().SetRelayServerData(new RelayServerData(joinAllocation, "dtls"));

    //for webgl
    var unityTransport = NetworkManager.Singleton.GetComponent<UnityTransport>();
    unityTransport.SetRelayServerData(new RelayServerData(joinAllocation, "wss"));
    unityTransport.UseWebSockets = true;


    return !string.IsNullOrEmpty(joinCode) && NetworkManager.Singleton.StartClient();
}

}

2

you look to be joining before setting the protocol to wss?

3

Im setting protocol to wss before joining the relay

4

Id have to dig in my code, but your startclientwithrealy code joinallocation call with code, is made before you set wss.

5

yes, first join allocation, then set relay server data, then start client. thats what unity document is saying

6

OK, i thought it reset when you changed it, id have to look in my code to find out - what is the exact error you see?

try setting websockets before the wss, as a quick look in my code thats the only obvious difference

1 Like
7

I checked websockets in unity transport in my network manager, so technically, i dont have to set it to true.
do you have a webgl game where p2p with relay is working?

8

Yes, i have it working - hence i checked my code

9

ok i will try to set websockets before wss

10

man this helped. you should write the unity documentary. you made my day!

11

thank you so much dude

12

No problem :slight_smile: see, i maybe insane, but occasionally i do know my stuff

13

and also turn down security access on the company laptop :smiley:

1 Like