Protocol

Introduction

A protocol library for Minecraft that supports multiple versions. (Currently Bedrock Edition only)

Links

• Jenkins
• JavaDocs
• Discord

Usage

Client

Creating a client

// This is the local address to bind to, not the remote one.
// If bound to 127.0.0.1 any incoming packets from outside your computer will not be received.
InetSocketAddress bindAddress = new InetSocketAddress("0.0.0.0", 12345);
BedrockClient client = new BedrockClient(bindAddress);

// Bind the port
client.bind().join();

Pinging a Remote Server

This can be done whilst the client is connected to a server however it cannot be to the connected server.

InetSocketAddress addressToPing = new InetSocketAddress("play.nukkitx.com", 19132);
client.ping(addressToPing).whenComplete((pong, throwable) -> {
    if (throwable != null) {
        // Error occurred or timeout
        return;
    }
    // Pong received.
}).join(); // Join if you do not want this to be handled asynchronously.

Connecting to a Remote Server

A BedrockClient can only have one session per instance. If you need more, create extra instances.

InetSocketAddress addressToConnect = new InetSocketAddress("play.nukkitx.com", 19132);
client.connect(addressToConnect).whenComplete((session, throwable) -> {
    if (throwable != null) {
        // Unable to establish connection
        return;
    }
    // Connection established
    // Make sure to set the packet codec version you wish to use before sending out packets
    session.setPacketCodec(Bedrock_v389.V389_CODEC);
    // Add disconnect handler
    session.addDisconnectHandler((reason) -> System.out.println("Disconnected"));
    // Remember to set a packet handler so you receive incoming packets
    session.setPacketHandler(new FooBarPacketHandler());
    // Now send packets...
}).join(); // Join if you do not want this to be handled asynchronously.

Server

Creating a Server

InetSocketAddress bindAddress = new InetSocketAddress("0.0.0.0", 19132);
BedrockServer server = new BedrockServer(bindAddress);

BedrockPong pong = new BedrockPong();
pong.setEdition("MCPE");
pong.setMotd("My Server");
pong.setPlayerCount(0);
pong.setMaximumPlayerCount(20);
pong.setGameType("Survival");
pong.setProtocolVersion(Bedrock_v389.V389_CODEC.getProtocolVersion());

server.setHandler(new BedrockServerEventHandler() {
    @Override
    public boolean onConnectionRequest(InetSocketAddress address) {
        return true; // Connection will be accepted
    }
    
    @Override
    public BedrockPong onQuery(InetSocketAddress address) {
        return pong;
    }
    
    @Override
    public void onSessionCreation(BedrockServerSession serverSession) {
        // Connection established
        // Add disconnect handler
        session.addDisconnectHandler((reason) -> System.out.println("Disconnected"));
        // Remember to set a packet handler so you receive incoming packets
        session.setPacketHandler(new FooBarPacketHandler());
        // By default, the server will use a compatible codec that will read any LoginPacket.
        // After receiving the LoginPacket, you need to set the correct packet codec for the client and continue. 
    }
});

// Start server up
server.bind().join();

Maven

Protocol Versions:

Dependency	Minecraft Version
bedrock-v291	1.7.0
bedrock-v313	1.8.0
bedrock-v332	1.9.0
bedrock-v340	1.10.0
bedrock-v354	1.11.0
bedrock-v361	1.12.0
bedrock-v388	1.13.0
bedrock-v389	1.14.0 - 1.14.50
bedrock-v390	1.14.60
bedrock-v407	1.16.0 - 1.16.10
bedrock-v408	1.16.20
bedrock-v419	1.16.100
bedrock-v422	1.16.200 - 1.16.201

Repository:

    <repositories>
        <repository>
            <id>nukkitx-repo-release</id>
            <url>https://repo.nukkitx.com/maven-releases/</url>
        </repository>
        <repository>
            <id>nukkitx-repo-snapshot</id>
            <url>https://repo.nukkitx.com/maven-snapshots/</url>
        </repository>
    </repositories>

Dependencies:

    <dependencies>
        <dependency>
            <groupId>com.nukkitx.protocol</groupId>
            <artifactId>bedrock-v(VERSION)</artifactId>
            <version>2.6.2-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>

Projects Using This Library

• Cloudburst - A bedrock first server software
• ProxyPass - Vanilla server man-in-the-middle proxy
• Geyser - A bridge between Bedrock and Java Edition
• BedrockConnect - Allow Xbox/Switch Bedrock clients to add and join servers

If you would like to add your project here, please create a pull request.