package ru.nanit.limbo.connection.pipeline; import io.netty.buffer.ByteBuf; import io.netty.channel.ChannelHandlerContext; import io.netty.handler.codec.MessageToMessageDecoder; import ru.nanit.limbo.protocol.*; import ru.nanit.limbo.protocol.registry.State; import ru.nanit.limbo.util.Logger; import java.util.List; public class PacketDecoder extends MessageToMessageDecoder { private State.PacketRegistry mappings; public PacketDecoder() { updateState(State.HANDSHAKING); } @Override protected void decode(ChannelHandlerContext ctx, ByteBuf buf, List out) throws Exception { if (!ctx.channel().isActive() || mappings == null) return; ByteMessage msg = new ByteMessage(buf); int packetId = msg.readVarInt(); Packet packet = mappings.getPacket(packetId); if (packet != null) { try { packet.decode(msg); } catch (Exception e) { Logger.warning("Cannot decode packet 0x%s: %s", Integer.toHexString(packetId), e.getMessage()); } ctx.fireChannelRead(packet); } else { Logger.warning("Undefined incoming packet: 0x" + Integer.toHexString(packetId)); } } public void updateState(State state) { this.mappings = state.serverBound; } }