Can't ClientTravel when client is connected to steam

Development Programming & Scripting Multiplayer & Networking
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1

We are making a online multiplayer game and we are having issues when it comes to using ClientTravel when connected to steam. In our game, we are using steam for the overlay and lobbies, but we aren’t using steam sessions. We have a dedicated server. We use Playfab for matchmaking and then send all the players to the correct server, once matched together.

The client successfully get matched with other player, put fail when it tries to travel to the server. I checked that it wasn’t that the client get the wrong IP addresse, but it gets the correct one.

Here is what the client logs looks like:

With steam client
With steam client1655×1004 442 KB

Thanks in advance

2

Update:

I was able to make the client use the IpNetDriver, but it leads to an error saying that the unique_net_id is incompatible. I tried following the advice from this post (UE4 incompatible_unique_net_id) but it just leads to the server crashing once the players connect.

Could it be that Unreal is designed to not support having the client and dedicated server not use the same online subsystem?

3

Hey There!

When working with Dedicated servers and using Steam Online Subsystem you need to be careful with the NetDriver that you specify in your DefaultEngine.ini.

The NetDriver is the class that will be responsible for listening and creating connections.

The Ue4 Steam online subsystem documentation page, says for you to add this line piece of code in your DefaultEngine.ini:

[/Script/Engine.GameEngine]
+NetDriverDefinitions=(DefName="GameNetDriver",DriverClassName="OnlineSubsystemSteam.SteamNetDriver",DriverClassNameFallback="OnlineSubsystemUtils.IpNetDriver")

In order to be able to use Online Susbsystem Steam Session interface.

If you don’t add it (or remove it), you will be able to use the steam resources (such as the overlay or the authentication) without messing up with the NetDriver, consequently, not messing up with your dedicated server connection.

Hope it helps :slight_smile:

2 Likes
4

Thanks for the reply, but I already tried what you said and it only creates a different error.

My last post explains what exactly happened.

5

Hi, I have same problem but it only occurs in Shipping build. I can connect dedicated server in editor. Do I need to enable Steam Sockets Plugin?

6

Hey there, I faced this problem again.
I connected by making the properties :

[OnlineSubsystemSteam]
bEnabled=true

[OnlineSubsystem]
DefaultPlatformService=Null

in my defaultEngine.ini
and loading the steam online subsystem by hand.