[URGENT] Why does AOnlineBeaconHost::Init() keep failing?

Development Programming & Scripting C++
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1

So I am trying to learn how to use online beacons in UE4, and there seems to be scarce information and documentation on how to use it. I’m trying to get information from a client listen server that’s waiting idle and keep running into issues trying to write the beacon in my game instance.

MyGameInstance.h

#include "Engine/GameInstance.h"
#include "DefconOnlineBeaconHost.h"
#include "DefconOnlineBeaconHostObject.h"
#include "MyGameInstance.generated.h"

UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = GlobalCommands)
		ADefconOnlineBeaconHost* Beacon;

	UFUNCTION(BlueprintCallable, Category = GlobalCommands)
		void InitializeBeaconHost();

##MyGameInstance.cpp
void UNWGameInstance::InitializeBeaconHost()
{

	if (Beacon)
	{
		Beacon->DestroyBeacon();
		Beacon = NULL;
	}

	// Create the hosting connection
	ADefconOnlineBeaconHost* BeaconHost = GetWorld()->SpawnActor<ADefconOnlineBeaconHost>(ADefconOnlineBeaconHost::StaticClass());

	if (BeaconHost && BeaconHost->InitHost())
	{
		// Register a class to handle traffic of a specific type
		ADefconOnlineBeaconHostObject* BeaconHostObject = GetWorld()->SpawnActor<ADefconOnlineBeaconHostObject>(ADefconOnlineBeaconHost::StaticClass());
		if (BeaconHostObject)
		{
			BeaconHost->RegisterHost(BeaconHostObject);
			Beacon = BeaconHost;
		}
		else
			GEngine->AddOnScreenDebugMessage(-1, 10, FColor::Red, TEXT("There was an error: BeaconHostObject is a nullptr."));
				
	}

	else
		GEngine->AddOnScreenDebugMessage(-1, 10, FColor::Red, TEXT("Beacon->Init() failed."));
	
	if (Beacon)
		Beacon->DefGetListenPort();

	else
		GEngine->AddOnScreenDebugMessage(-1, 10, FColor::Red, TEXT("There was an error: Beacon is a null ptr."));
}

##MyOnlineBeaconHost.h

#include "CoreMinimal.h"
#include "OnlineBeaconHost.h"
#include "MyOnlineBeaconHost.generated.h"

/**
 *
 */
UCLASS()
class DEFCON5DEV_API ADefconOnlineBeaconHost : public AOnlineBeaconHost
{
	GENERATED_BODY()

public:

    UFUNCTION(BlueprintCallable, Category = GlobalCommands)
	void MyCustomGetListenPort();
};

##MyOnlineBeacon.cpp
#include “MyProject.h”
#include “MyOnlineBeaconHost.h”

void AMyOnlineBeaconHost::MyCustomGetListenPort()
{
	GEngine->AddOnScreenDebugMessage(-1, 10, FColor::Green, TEXT("Getting Listen Port... Please Wait."));
	GEngine->AddOnScreenDebugMessage(-1, 10, FColor::Green, FString::Printf(TEXT("Beacon Listening Port: %d"), GetListenPort()));
}

###In MyGameInstance.cpp, when I try to call BeaconHost->InitHost(), it returns false (meaning that it failed to complete successfully). Any help would be greatly appreciated. I’m on a time constrained project right now, so there are no wrong answers on this one.

I’ll take a guess or anything, so even if your not sure, through up your ideas. I’ve spent a few days trying to work out this issue and I’m way behind on this project now because of this.

2

##[Update]
I’ve traced the issue back to: bool AOnlineBeacon::InitBase()

It seems that NetDriver is NULL.

3

What would I do for the DriverClassName if I’m using OnlineSubsytemNULL rather than Steam?

4

Use what I’ve put in the fallback but instead as the DriverClassName

5

Let me try it out. I’ll get back to you within a few days. Thanks!

6

Well, I don’t have a great way of testing this as I need to use a custom NetDriver. Can you point me in the right direction for that?

7

You’re very likely missing the BeaconNetDriver definition.

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