packetlistener

Packet listener for modifiy readed and sented packets

Installation

Maven

<repository>
    <id>jitpack.io</id>
    <url>https://jitpack.io</url>
</repository>

<dependency>
    <groupId>eu.miopowered</groupId>
    <artifactId>packetlistener</artifactId>
    <version>2.0</version>
</dependency>
<!-- You should add joor, if you want to access joor in your ide to modify packets without direct reflection -->
<dependency>
    <groupId>org.jooq</groupId>
    <artifactId>joor-java-8</artifactId>
    <version>0.9.13</version>
</dependency>

Gradle

repositories {
    maven { url 'https://jitpack.io' }
}
		
dependencies {
  implementation 'eu.miopowered:packetlistener:2.0'
  
  // You should add joor, if you want to access joor in your ide to modify packets without direct reflection
  implementation 'org.jooq:joor-java-8:0.9.13'
}

Usage

Simple packet listening

Player player = event.getPlayer();

PacketTarget.listen(PacketListener.of(player)
        .filter(PacketState.PLAY, PacketType.IN/*, PacketFilter.name("OutBlockChange") */)
        .sent((context, packet) -> {
            System.out.println(">> " + packet.packetName());
            return true; // false means that the packet wont be sent
        })
        .receive((context, packet) -> {
            System.out.println("<< " + packet.packetName());
            return true; // false means that the packet wont be used
        }));

// Remove handler on plugin reload
        
PacketTarget.remove(event.getPlayer());

Event system

Instead of listening you can check the events for sent / received packets

Register the library in your enable

EventListener.register(javaPlugin)

You than can use the following events for modifying packets:

PacketReceiveEvent, PacketSentEvent

Example

    @EventHandler
    public void handle(PacketSentEvent event) {
        if (event.packet().state() == PacketState.PLAY
                && event.packet().packetName().equals("PacketPlayOutTitle")) {
            event.packet().reflect().set("a", "some reflection manipulation");
        }
    }

As you see, the joor reflection library is added and you can modifiy the packet via reflect method.

Player packet actions

You can perform various actions like actionbar and titles with this library

PacketPlayer packetPlayer = PacketPlayer.of(player);

packetPlayer.sendFullTitle(String title, String subtitle, int fadeInTime, int showTime, int fadeOutTime)
packetPlayer.sendActionbar(String text)

Everything should be version independent because of reflection.

License

MIT