diff --git a/connector/src/main/java/org/geysermc/connector/network/translators/java/JavaPluginMessageTranslator.java b/connector/src/main/java/org/geysermc/connector/network/translators/java/JavaPluginMessageTranslator.java index 60227aa4..cd0161db 100644 --- a/connector/src/main/java/org/geysermc/connector/network/translators/java/JavaPluginMessageTranslator.java +++ b/connector/src/main/java/org/geysermc/connector/network/translators/java/JavaPluginMessageTranslator.java @@ -33,14 +33,56 @@ import org.geysermc.connector.network.translators.Translator; import com.github.steveice10.mc.protocol.packet.ingame.client.ClientPluginMessagePacket; import com.github.steveice10.mc.protocol.packet.ingame.server.ServerPluginMessagePacket; +import java.nio.charset.StandardCharsets; + @Translator(packet = ServerPluginMessagePacket.class) public class JavaPluginMessageTranslator extends PacketTranslator { + + private static byte[] brandData; + + static { + byte[] data = GeyserConnector.NAME.getBytes(StandardCharsets.UTF_8); + byte[] varInt = writeVarInt(data.length); + brandData = new byte[varInt.length + data.length]; + System.arraycopy(varInt, 0, brandData, 0, varInt.length); + System.arraycopy(data, 0, brandData, varInt.length, data.length); + } + + @Override public void translate(ServerPluginMessagePacket packet, GeyserSession session) { if (packet.getChannel().equals("minecraft:brand")) { session.getDownstream().getSession().send( - new ClientPluginMessagePacket(packet.getChannel(), GeyserConnector.NAME.getBytes()) + new ClientPluginMessagePacket(packet.getChannel(), brandData) ); } } + + private static byte[] writeVarInt(int value) { + byte[] data = new byte[getVarIntLength(value)]; + int index = 0; + do { + byte temp = (byte)(value & 0b01111111); + value >>>= 7; + if (value != 0) { + temp |= 0b10000000; + } + data[index] = temp; + index++; + } while (value != 0); + return data; + } + + private static int getVarIntLength(int number) { + if ((number & 0xFFFFFF80) == 0) { + return 1; + } else if ((number & 0xFFFFC000) == 0) { + return 2; + } else if ((number & 0xFFE00000) == 0) { + return 3; + } else if ((number & 0xF0000000) == 0) { + return 4; + } + return 5; + } }