Steam Sockets join session error

Development Programming & Scripting Multiplayer & Networking
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1

Hello!, I’m trying to add multiplayer sessions from c++ without the Advance Sessions plugin. I can create a session without issues, but when I try to join another player, I get this warning and a subsequent error:

LogSteamSocketsAPI: Warning: SteamSockets API: Warning [P2P steamid:XXXXXX vport 7777] Relay candidates enabled by P2P_Transport_ICE_Enable, but P2P_TURN_ServerList is empty

LogNet: Error: UEngine::BroadcastNetworkFailure: FailureType = PendingConnectionFailure, ErrorString = Your connection to the host has been lost., Driver = Name:PendingNetDriver Def:GameNetDriver SteamSocketsNetDriver_XXXXXX.

This is how my DefaultEngine.ini is setup:

[/Script/Engine.NetworkSettings]

DefaultNetDriverName=“SteamSocketsNetDriver”

[/Script/Engine.GameEngine]

!NetDriverDefinitions=ClearArray

+NetDriverDefinitions=(DefName=“GameNetDriver”,DriverClassName=“/Script/SteamSockets.SteamSocketsNetDriver”,DriverClassNameFallback=“OnlineSubsystemUtils.IpNetDriver”)

[OnlineSubsystem]

DefaultPlatformService=Steam

VoiceNotificationDelta=0.2

bHasVoiceEnabled=True

[OnlineSubsystemSteam]

bEnabled=True

SteamDevAppId=480

GameServerQueryPort=27015

bUsesPresence=True

bUseLobbiesIfAvailable=True

bUseSteamNetworking=True

bAllowP2PPacketRelay=True

[/Script/OnlineSubsystem.IpNetDriver]

ConnectionTimeout=60.0

[/Script/OnlineSubsystemSteam.SteamNetDriver]

NetConnectionClassName=OnlineSubsystemSteam.SteamNetConnection

P2P_Transport_ICE_Enable=False

P2P_Transport_STUN_Enable=False

P2P_Transport_Relay_Enable=False

[ConsoleVariables]

net.CurrentHandshakeVersion=2

net.MinHandshakeVersion=2

net.VerifyNetSessionID=0

net.VerifyNetClientID=0

[ConsoleVariables]

net.CurrentHandshakeVersion=2

net.MinHandshakeVersion=2

Thanks in advance for the help!

2

YEah I’m having the same issue. Steam lobby stopped working for me in 5.6 and I can get my host to create the session, but the other player can’t join. In the host logs, I can see that the connection is refused for some reason:

Warning: SteamSockets API: Warning Ignoring P2P signal from ‘steamid:xxxxxxxxx’, unknown remote connection #xxxxxxxxx

3

Im on 5.6.1 and using Advanced Sessions Plugin, OSS Steam and Steam Sockets and I get the same error (LogSteamSocketsAPI: Warning: SteamSockets API: Warning Ignoring P2P signal from ‘steamid:XXXXXX’, unknown remote connection #YYYYY) in server logs when my friend tries to join me.

Any update on the actual cause of the issue ? The error comes from Steam servers so its hard to debug it in UE code.

Edit: I forgot to add the “listen” param when my hosting player (listen server) opens my in game level

4

Hello, how did you solve that?

5

Seems like there are no proper solutions and it won’t be fixed in 5.7