2023-05-28 18:51:20 +02:00
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/*
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2023-05-28 19:19:59 +02:00
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* This file is part of ViaLoader - https://github.com/RaphiMC/ViaLoader
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* Copyright (C) 2023 RK_01/RaphiMC and contributors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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2023-05-28 19:19:59 +02:00
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package net.raphimc.vialoader.netty;
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import com.viaversion.viaversion.api.connection.UserConnection;
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import io.netty.channel.ChannelHandler;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.ChannelInboundHandlerAdapter;
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2023-10-07 19:13:21 +02:00
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import net.raphimc.viabedrock.api.protocol.BedrockBaseProtocol;
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import net.raphimc.viabedrock.netty.BatchLengthCodec;
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import net.raphimc.viabedrock.netty.PacketEncapsulationCodec;
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import net.raphimc.vialegacy.api.protocol.PreNettyBaseProtocol;
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import net.raphimc.vialegacy.netty.PreNettyLengthPrepender;
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import net.raphimc.vialegacy.netty.PreNettyLengthRemover;
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import net.raphimc.vialoader.netty.viabedrock.DisconnectHandler;
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import net.raphimc.vialoader.netty.viabedrock.RakMessageEncapsulationCodec;
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import net.raphimc.vialoader.util.VersionEnum;
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public abstract class VLLegacyPipeline extends ChannelInboundHandlerAdapter {
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public static final String VIA_DECODER_NAME = "via-decoder";
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public static final String VIA_ENCODER_NAME = "via-encoder";
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public static final String VIALEGACY_PRE_NETTY_LENGTH_PREPENDER_NAME = "vialegacy-pre-netty-length-prepender";
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public static final String VIALEGACY_PRE_NETTY_LENGTH_REMOVER_NAME = "vialegacy-pre-netty-length-remover";
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public static final String VIABEDROCK_DISCONNECT_HANDLER_NAME = "viabedrock-disconnect-handler";
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public static final String VIABEDROCK_FRAME_ENCAPSULATION_HANDLER_NAME = "viabedrock-frame-encapsulation";
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public static final String VIABEDROCK_PACKET_ENCAPSULATION_HANDLER_NAME = "viabedrock-packet-encapsulation";
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protected final UserConnection user;
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protected final VersionEnum version;
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public VLLegacyPipeline(final UserConnection user, final VersionEnum version) {
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this.user = user;
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this.version = version;
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}
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@Override
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public void handlerAdded(ChannelHandlerContext ctx) {
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ctx.pipeline().addBefore(this.packetDecoderName(), VIA_DECODER_NAME, this.createViaDecoder());
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ctx.pipeline().addBefore(this.packetEncoderName(), VIA_ENCODER_NAME, this.createViaEncoder());
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if (this.version.isOlderThanOrEqualTo(VersionEnum.r1_6_4)) {
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this.user.getProtocolInfo().getPipeline().add(PreNettyBaseProtocol.INSTANCE);
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ctx.pipeline().addBefore(this.lengthSplitterName(), VIALEGACY_PRE_NETTY_LENGTH_PREPENDER_NAME, this.createViaLegacyPreNettyLengthPrepender());
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ctx.pipeline().addBefore(this.lengthPrependerName(), VIALEGACY_PRE_NETTY_LENGTH_REMOVER_NAME, this.createViaLegacyPreNettyLengthRemover());
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} else if (this.version.equals(VersionEnum.bedrockLatest)) {
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this.user.getProtocolInfo().getPipeline().add(BedrockBaseProtocol.INSTANCE);
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ctx.pipeline().addBefore(this.lengthSplitterName(), VIABEDROCK_DISCONNECT_HANDLER_NAME, this.createViaBedrockDisconnectHandler());
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ctx.pipeline().addBefore(this.lengthSplitterName(), VIABEDROCK_FRAME_ENCAPSULATION_HANDLER_NAME, this.createViaBedrockFrameEncapsulationHandler());
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this.replaceLengthSplitter(ctx, this.createViaBedrockBatchLengthCodec());
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ctx.pipeline().remove(this.lengthPrependerName());
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ctx.pipeline().addBefore(VIA_DECODER_NAME, VIABEDROCK_PACKET_ENCAPSULATION_HANDLER_NAME, this.createViaBedrockPacketEncapsulationHandler());
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}
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}
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@Override
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public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
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if (CompressionReorderEvent.INSTANCE.equals(evt)) {
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final int decoderIndex = ctx.pipeline().names().indexOf(decompressName());
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if (decoderIndex == -1) return;
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if (decoderIndex > ctx.pipeline().names().indexOf(VIA_DECODER_NAME)) {
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final ChannelHandler decoder = ctx.pipeline().get(VIA_DECODER_NAME);
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final ChannelHandler encoder = ctx.pipeline().get(VIA_ENCODER_NAME);
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ctx.pipeline().remove(decoder);
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ctx.pipeline().remove(encoder);
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ctx.pipeline().addAfter(decompressName(), VIA_DECODER_NAME, decoder);
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ctx.pipeline().addAfter(compressName(), VIA_ENCODER_NAME, encoder);
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}
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}
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super.userEventTriggered(ctx, evt);
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}
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protected ChannelHandler createViaDecoder() {
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return new ViaDecoder(this.user);
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}
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protected ChannelHandler createViaEncoder() {
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return new ViaEncoder(this.user);
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}
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protected ChannelHandler createViaLegacyPreNettyLengthPrepender() {
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return new PreNettyLengthPrepender(this.user);
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}
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protected ChannelHandler createViaLegacyPreNettyLengthRemover() {
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return new PreNettyLengthRemover(this.user);
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}
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protected ChannelHandler createViaBedrockDisconnectHandler() {
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return new DisconnectHandler();
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}
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protected ChannelHandler createViaBedrockFrameEncapsulationHandler() {
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return new RakMessageEncapsulationCodec();
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}
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protected ChannelHandler createViaBedrockBatchLengthCodec() {
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return new BatchLengthCodec();
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}
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protected ChannelHandler createViaBedrockPacketEncapsulationHandler() {
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return new PacketEncapsulationCodec();
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}
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protected void replaceLengthSplitter(final ChannelHandlerContext ctx, final ChannelHandler handler) {
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ctx.pipeline().replace(this.lengthSplitterName(), this.lengthSplitterName(), handler);
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}
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protected abstract String decompressName();
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protected abstract String compressName();
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protected abstract String packetDecoderName();
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protected abstract String packetEncoderName();
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protected abstract String lengthSplitterName();
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protected abstract String lengthPrependerName();
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}
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