SteamNetGodot

Is this for me?

In it's core SteamNetGodot is the combination of Facepunch.Steamworks and LiteNetLib. A performant, easy to use C# Steam Networking library for the wonderful Godot engine.

It will be regularly updated since it's currently in use on our game Taverna.

Goodies

Compressed Steam VoIP (3-5 KB/s)
Smart matchmaking through Steam Lobbies / internal logic
RPC system
Very simple C# code
Bunch of cool networking code as example (replication, resource management, audio, kick, mute, ban...)
Open Source
Godot 4.3
MIT license

Do Stuff!

Your packets

public struct VoicePacket : INetSerializable
{
    public uint networkId;
    public ulong internalVoiceTick;
    public int size;
    public ArraySegment<byte> compressedVoiceData;
    public ulong fromUser;

    public void Deserialize(NetDataReader reader)
    {
        networkId = reader.GetUInt();
        internalVoiceTick = reader.GetULong();
        size = reader.GetInt();
        compressedVoiceData = reader.GetBytesSegment(size);
        fromUser = reader.GetULong();
    }

    public void Serialize(NetDataWriter writer)
    {
        writer.Put(networkId);
        writer.Put(internalVoiceTick);
        writer.Put(size);
        writer.PutBytesSegment(compressedVoiceData);
        writer.Put(fromUser);
    }
}

Subscribe RPC

NetworkManager.Instance.Client_SubscribeRPC<VoicePacket, Connection>(Client_OnVoicePacketReceived, () => this.IsValid() == false);
NetworkManager.Instance.Server_SubscribeRPC<VoicePacket, Connection>(Server_OnVoicePacketReceived, () => this.IsValid() == false);

Create and send

VoicePacket voicePacket = new VoicePacket();
voicePacket.compressedVoiceData = compressedVoiceData;
voicePacket.size = compressedVoiceData.Count;
voicePacket.internalVoiceTick = internalVoiceTick;
voicePacket.networkId = pawn.networkId;

NetworkManager.Instance.Client.Send<VoicePacket>(voicePacket, SendType.Reliable);

Instantiate networked objects

ObjectState player = gameState.Server_CreateObjectStateAndPawn((uint)steamId, ResourceId.PawnPlayer, "", steamId, true);

Friend playerSteam = new Friend(steamId);
await playerSteam.RequestInfoAsync();
player.GetPawn().SetName(playerSteam.Name);

UINotifications.Instance.PushNotification($"Instantiated Pawn for player {playerSteam.Name}");

I don't like this networking architecture

Great! And I don't like you. Jokes aside, the base code is divided from the gameplay solution. For sake of easier maintainability it was all put inside one project.

Get BaseClient, BaseServer, Processor and you are good to move to your solution.

You still need to import Facepunch.Steamworks and LiteNetLib as they are in the backbone of the library.

Performance info

Aimed to get zero garbage on receive / read . If you find some bad stuff let us know.

VOIP bandwidth is between 3-5KB/s.

Transform replication has little optimization. When moving between 15-20 KB/s 60h tick rate. I would recommend to strip it down to make it usable. I will remove this little paragr as soon as I commit the improvements.

Contact

overfortgames@gmail.com

Discord

Q&A

Steam doesn't connect in build?

Make sure to add steam_api64.dll to your exported build

Does it support Rigidbodies?

Yes but not no prediction. It will be added in the future.

Prediction?

No prediction.

What is a ResourceID?

A string that represent a resource. It's a convenient way to do local instantiation and replication.
We added a little addon to easily handle them in the inspector

#if TOOLS
        [ResourceIdDropdown]
#endif
        [Export]
        public string resourceId;

You still need to add them manually in ResourceId.cs

What is Rich Presence?

https://partner.steamgames.com/doc/features/enhancedrichpresence

OverfortGames / SteamNetGodot

readme