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LiteNetLib 1.0 indev

Lite reliable UDP library for .NET Standard 2.0 (Mono, .NET Core, .NET Framework)

Discord chat:

OLD BRANCH (and examples) for 0.9.x

Little Game Example on Unity

Documentation

Build

NuGet

Release builds

DLL build from master

( Warning! Master branch can be unstable! )

Features

• Lightweight
  • Small CPU and RAM usage
  • Small packet size overhead ( 1 byte for unreliable, 4 bytes for reliable packets )
• Simple connection handling
• Peer to peer connections
• Helper classes for sending and reading messages
• Multiple data channels
• Different send mechanics
  • Reliable with order
  • Reliable without order
  • Reliable sequenced (realiable only last packet)
  • Ordered but unreliable with duplication prevention
  • Simple UDP packets without order and reliability
• Fast packet serializer (Usage manual)
• Automatic small packets merging
• Automatic fragmentation of reliable packets
• Automatic MTU detection
• Optional CRC32C checksums
• UDP NAT hole punching
• NTP time requests
• Packet loss and latency simulation
• IPv6 support (dual mode)
• Connection statisitcs
• Multicasting (for discovering hosts in local network)
• Unity support
• Supported platforms:
  • Windows/Mac/Linux (.NET Framework, Mono, .NET Core, .NET Standard)
  • Lumin OS (Magic Leap)
  • Monogame
  • Godot
  • Unity 2018.3 (Desktop platforms, Android, iOS, Switch)

Unity notes!!!

• Minimal supported Unity is 2018.3. For older Unity versions use 0.9.x library versions
• Always use library sources instead of precompiled DLL files ( because there are platform specific #ifdefs and workarounds for unity bugs )

Usage samples

Client

EventBasedNetListener listener = new EventBasedNetListener();
NetManager client = new NetManager(listener);
client.Start();
client.Connect("localhost" /* host ip or name */, 9050 /* port */, "SomeConnectionKey" /* text key or NetDataWriter */);
listener.NetworkReceiveEvent += (fromPeer, dataReader, deliveryMethod) =>
{
    Console.WriteLine("We got: {0}", dataReader.GetString(100 /* max length of string */));
    dataReader.Recycle();
};

while (!Console.KeyAvailable)
{
    client.PollEvents();
    Thread.Sleep(15);
}

client.Stop();

Server

EventBasedNetListener listener = new EventBasedNetListener();
NetManager server = new NetManager(listener);
server.Start(9050 /* port */);

listener.ConnectionRequestEvent += request =>
{
    if(server.ConnectedPeersCount < 10 /* max connections */)
        request.AcceptIfKey("SomeConnectionKey");
    else
        request.Reject();
};

listener.PeerConnectedEvent += peer =>
{
    Console.WriteLine("We got connection: {0}", peer.EndPoint); // Show peer ip
    NetDataWriter writer = new NetDataWriter();                 // Create writer class
    writer.Put("Hello client!");                                // Put some string
    peer.Send(writer, DeliveryMethod.ReliableOrdered);             // Send with reliability
};

while (!Console.KeyAvailable)
{
    server.PollEvents();
    Thread.Sleep(15);
}
server.Stop();