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LiteNetLib 0.9 indev

Lite reliable UDP library for .NET Framework 3.5, Mono, .NET Core 2.1, .NET Standard 2.0.

Discord chat: Discord

OLD BRANCH (and examples) for 0.8.x

Little Game Example on Unity

Documentation

Build

( Warning! Master branch can be unstable! )

Donations are welcome and will help further development of this project.

https://www.buymeacoffee.com/revx

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)
    • Android (Unity)
    • iOS (Unity)
    • UWP Windows 10 including phones
    • Lumin OS (Magic Leap)

Unity notes!!!

  • 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.PeersCount < 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();

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