PluginMessagePacket

protocol/src/main/java/mc/protocol/State.java

@@ -6,10 +6,7 @@ import mc.protocol.packets.ClientSidePacket;
 import mc.protocol.packets.Packet;
 import mc.protocol.packets.PingPacket;
 import mc.protocol.packets.ServerSidePacket;
-import mc.protocol.packets.client.ClientSettingsPacket;
-import mc.protocol.packets.client.HandshakePacket;
-import mc.protocol.packets.client.LoginStartPacket;
-import mc.protocol.packets.client.StatusServerRequestPacket;
+import mc.protocol.packets.client.*;
 import mc.protocol.packets.server.DisconnectPacket;
 import mc.protocol.packets.server.JoinGamePacket;
 import mc.protocol.packets.server.LoginSuccessPacket;
@@ -49,7 +46,10 @@ public enum State {
 	),
 	PLAY(3,
 			// server bound
-			Map.of(0x04, ClientSettingsPacket.class),
+			Map.of(
+					0x04, ClientSettingsPacket.class,
+					0x09, PluginMessagePacket.class
+			),
 			// client bound
 			Map.of(JoinGamePacket.class, 0x23)
 	);

protocol/src/main/java/mc/protocol/packets/client/PluginMessagePacket.java

@@ -0,0 +1,42 @@
+package mc.protocol.packets.client;
+
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.ToString;
+import mc.protocol.io.NetByteBuf;
+import mc.protocol.packets.ClientSidePacket;
+
+/**
+ * Plugin Message packet.
+ *
+ * <p>Канал связи для модов и плагинов.</p>
+ *
+ * <p>Структура пакета</p>
+ * <pre>
+ * | FIELD        | TYPE        | NOTES            |
+ * |--------------|-------------|------------------|
+ * | Channel name | String (20) | Название канала  |
+ * | Data         | Byte array  | Любые данные     |
+ * </pre>
+ *
+ * @see <a href="https://wiki.vg/index.php?title=Protocol&oldid=14204#Plugin_Message_.28serverbound.29">Plugin Message (serverbound)</a>
+ * @see <a href="https://wiki.vg/index.php?title=Plugin_channels&oldid=14089">Plugin channels</a>
+ * @see <a href="https://dinnerbone.com/blog/2012/01/13/minecraft-plugin-channels-messaging/">Minecraft Plugin Channels + Messaging</a>
+ */
+@NoArgsConstructor
+@Getter
+@EqualsAndHashCode
+@ToString
+public class PluginMessagePacket implements ClientSidePacket {
+
+	private String channelName;
+	private byte[] rawData;
+
+	@Override
+	public void readSelf(NetByteBuf netByteBuf) {
+		this.channelName = netByteBuf.readString(20);
+		this.rawData = new byte[netByteBuf.readableBytes()];
+		netByteBuf.readBytes(this.rawData);
+	}
+}