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Implemented abstracted netty pipeline

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This commit is contained in:
RaphiMC 2023-04-02 21:21:50 +02:00
parent 2600ae580a
commit 643cf0b4ca
14 changed files with 497 additions and 138 deletions
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8
README.md
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@ -36,14 +36,14 @@ To include ViaLegacy and ViaAprilFools, you can look at their READMEs: [ViaLegac
Here is an example dependency configuration for all components:
```groovy
implementation "com.viaversion:viaversion:4.7.0-23w12a-SNAPSHOT"
implementation("com.viaversion:viabackwards-common:4.7.0-23w12a-SNAPSHOT") {
implementation "com.viaversion:viaversion:4.7.0-23w13a-SNAPSHOT"
implementation("com.viaversion:viabackwards-common:4.7.0-23w13a-SNAPSHOT") {
exclude group: "com.viaversion", module: "viaversion" // Exclude transitive dependency. Include manually for more control
exclude group: "io.netty", module: "netty-all" // Don't include the outdated netty version
}
implementation "com.viaversion:viarewind-core:2.0.4-SNAPSHOT"
implementation "net.raphimc:ViaLegacy:2.2.9"
implementation "net.raphimc:ViaAprilFools:2.0.5"
implementation "net.raphimc:ViaLegacy:2.2.11"
implementation "net.raphimc:ViaAprilFools:2.0.6"
```
## Implementation

18
build.gradle
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@ -17,6 +17,18 @@ repositories {
name = "Lenni0451"
url "https://maven.lenni0451.net/releases"
}
maven {
name = "Lenni0451 Snapshots"
url "https://maven.lenni0451.net/snapshots"
}
maven {
name = "OpenCollab Releases"
url = "https://repo.opencollab.dev/maven-releases/"
}
maven {
name = "OpenCollab Snapshots"
url = "https://repo.opencollab.dev/maven-snapshots/"
}
maven {
name = "ViaVersion"
url "https://repo.viaversion.com"
@ -27,9 +39,13 @@ dependencies {
compileOnly "com.viaversion:viaversion:4.7.0-23w12a-SNAPSHOT"
compileOnly("com.viaversion:viabackwards-common:4.7.0-23w12a-SNAPSHOT") {
exclude group: "com.viaversion", module: "viaversion"
exclude group: "io.netty", module: "netty-all"
}
compileOnly "com.viaversion:viarewind-core:2.0.4-SNAPSHOT"
compileOnly "net.raphimc:ViaLegacy:2.2.6"
compileOnly "net.raphimc:ViaLegacy:2.2.11"
compileOnly "net.raphimc:ViaAprilFools:2.0.6"
compileOnly "net.raphimc:ViaBedrock:0.0.1-SNAPSHOT"
compileOnly "org.cloudburstmc.netty:netty-transport-raknet:1.0.0.CR1-SNAPSHOT"
api "org.slf4j:slf4j-api:2.0.7"
api "org.yaml:snakeyaml:2.0"

46
src/main/java/net/raphimc/viaprotocolhack/impl/platform/ViaAprilFoolsPlatformImpl.java Normal file
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@ -0,0 +1,46 @@
/*
* This file is part of ViaProtocolHack - https://github.com/RaphiMC/ViaProtocolHack
* Copyright (C) 2023 RK_01/RaphiMC and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.raphimc.viaprotocolhack.impl.platform;
import com.viaversion.viaversion.api.Via;
import net.raphimc.viaaprilfools.platform.ViaAprilFoolsPlatform;
import net.raphimc.viaprotocolhack.util.JLoggerToSLF4J;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.util.logging.Logger;
public class ViaAprilFoolsPlatformImpl implements ViaAprilFoolsPlatform {
private static final Logger LOGGER = new JLoggerToSLF4J(LoggerFactory.getLogger("ViaAprilFools"));
public ViaAprilFoolsPlatformImpl() {
this.init(this.getDataFolder());
}
@Override
public Logger getLogger() {
return LOGGER;
}
@Override
public File getDataFolder() {
return Via.getPlatform().getDataFolder();
}
}

46
src/main/java/net/raphimc/viaprotocolhack/impl/platform/ViaBedrockPlatformImpl.java Normal file
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@ -0,0 +1,46 @@
/*
* This file is part of ViaProtocolHack - https://github.com/RaphiMC/ViaProtocolHack
* Copyright (C) 2023 RK_01/RaphiMC and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.raphimc.viaprotocolhack.impl.platform;
import com.viaversion.viaversion.api.Via;
import net.raphimc.viabedrock.platform.ViaBedrockPlatform;
import net.raphimc.viaprotocolhack.util.JLoggerToSLF4J;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.util.logging.Logger;
public class ViaBedrockPlatformImpl implements ViaBedrockPlatform {
private static final Logger LOGGER = new JLoggerToSLF4J(LoggerFactory.getLogger("ViaBedrock"));
public ViaBedrockPlatformImpl() {
this.init(this.getDataFolder());
}
@Override
public Logger getLogger() {
return LOGGER;
}
@Override
public File getDataFolder() {
return Via.getPlatform().getDataFolder();
}
}

7
src/main/java/net/raphimc/viaprotocolhack/impl/providers/VPHMovementTransmitterProvider.java
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@ -46,12 +46,11 @@ public class VPHMovementTransmitterProvider extends MovementTransmitterProvider
final MovementTracker tracker = userConnection.get(MovementTracker.class);
tracker.incrementIdlePacket();
final PacketWrapper wrapper = PacketWrapper.create(ServerboundPackets1_8.PLAYER_MOVEMENT, userConnection);
wrapper.write(Type.BOOLEAN, tracker.isGround());
userConnection.getChannel().eventLoop().submit(() -> {
try {
wrapper.sendToServer(Protocol1_9To1_8.class);
final PacketWrapper playerMovement = PacketWrapper.create(ServerboundPackets1_8.PLAYER_MOVEMENT, userConnection);
playerMovement.write(Type.BOOLEAN, tracker.isGround());
playerMovement.sendToServer(Protocol1_9To1_8.class);
} catch (Throwable ignored) {
}
});

4
src/main/java/net/raphimc/viaprotocolhack/impl/viaversion/VPHInjector.java
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@ -50,12 +50,12 @@ public class VPHInjector implements ViaInjector {
@Override
public String getEncoderName() {
return VPHPipeline.ENCODER_HANDLER_NAME;
return VPHPipeline.VIA_CODEC_NAME;
}
@Override
public String getDecoderName() {
return VPHPipeline.DECODER_HANDLER_NAME;
return VPHPipeline.VIA_CODEC_NAME;
}
@Override

27
src/main/java/net/raphimc/viaprotocolhack/netty/CompressionReorderEvent.java Normal file
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@ -0,0 +1,27 @@
/*
* This file is part of ViaProtocolHack - https://github.com/RaphiMC/ViaProtocolHack
* Copyright (C) 2023 RK_01/RaphiMC and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.raphimc.viaprotocolhack.netty;
public class CompressionReorderEvent {
public static final CompressionReorderEvent INSTANCE = new CompressionReorderEvent();
private CompressionReorderEvent() {
}
}

61
src/main/java/net/raphimc/viaprotocolhack/netty/VPHDecodeHandler.java
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@ -1,61 +0,0 @@
/*
* This file is part of ViaProtocolHack - https://github.com/RaphiMC/ViaProtocolHack
* Copyright (C) 2023 RK_01/RaphiMC and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.raphimc.viaprotocolhack.netty;
import com.viaversion.viaversion.api.connection.UserConnection;
import com.viaversion.viaversion.exception.CancelCodecException;
import com.viaversion.viaversion.exception.CancelDecoderException;
import com.viaversion.viaversion.util.PipelineUtil;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageDecoder;
import java.util.List;
public class VPHDecodeHandler extends MessageToMessageDecoder<ByteBuf> {
protected final UserConnection user;
public VPHDecodeHandler(final UserConnection user) {
this.user = user;
}
@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf bytebuf, List<Object> out) throws Exception {
if (!user.checkIncomingPacket()) throw CancelDecoderException.generate(null);
if (!user.shouldTransformPacket()) {
out.add(bytebuf.retain());
return;
}
final ByteBuf transformedBuf = ctx.alloc().buffer().writeBytes(bytebuf);
try {
user.transformIncoming(transformedBuf, CancelDecoderException::generate);
out.add(transformedBuf.retain());
} finally {
transformedBuf.release();
}
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
if (PipelineUtil.containsCause(cause, CancelCodecException.class)) return;
super.exceptionCaught(ctx, cause);
}
}

61
src/main/java/net/raphimc/viaprotocolhack/netty/VPHEncodeHandler.java
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@ -1,61 +0,0 @@
/*
* This file is part of ViaProtocolHack - https://github.com/RaphiMC/ViaProtocolHack
* Copyright (C) 2023 RK_01/RaphiMC and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.raphimc.viaprotocolhack.netty;
import com.viaversion.viaversion.api.connection.UserConnection;
import com.viaversion.viaversion.exception.CancelCodecException;
import com.viaversion.viaversion.exception.CancelEncoderException;
import com.viaversion.viaversion.util.PipelineUtil;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageEncoder;
import java.util.List;
public class VPHEncodeHandler extends MessageToMessageEncoder<ByteBuf> {
protected final UserConnection user;
public VPHEncodeHandler(final UserConnection user) {
this.user = user;
}
@Override
protected void encode(ChannelHandlerContext ctx, ByteBuf bytebuf, List<Object> out) throws Exception {
if (!user.checkOutgoingPacket()) throw CancelEncoderException.generate(null);
if (!user.shouldTransformPacket()) {
out.add(bytebuf.retain());
return;
}
final ByteBuf transformedBuf = ctx.alloc().buffer().writeBytes(bytebuf);
try {
user.transformOutgoing(transformedBuf, CancelEncoderException::generate);
out.add(transformedBuf.retain());
} finally {
transformedBuf.release();
}
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
if (PipelineUtil.containsCause(cause, CancelCodecException.class)) return;
super.exceptionCaught(ctx, cause);
}
}

98
src/main/java/net/raphimc/viaprotocolhack/netty/VPHPipeline.java
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@ -17,11 +17,99 @@
*/
package net.raphimc.viaprotocolhack.netty;
public class VPHPipeline {
import com.viaversion.viaversion.api.connection.UserConnection;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelPipeline;
import net.raphimc.viabedrock.netty.BatchLengthCodec;
import net.raphimc.viabedrock.netty.PacketEncapsulationCodec;
import net.raphimc.viabedrock.protocol.BedrockBaseProtocol;
import net.raphimc.vialegacy.netty.PreNettyLengthCodec;
import net.raphimc.vialegacy.protocols.release.protocol1_7_2_5to1_6_4.baseprotocols.PreNettyBaseProtocol;
import net.raphimc.viaprotocolhack.netty.viabedrock.DisconnectHandler;
import net.raphimc.viaprotocolhack.netty.viabedrock.RakMessageEncapsulationCodec;
import net.raphimc.viaprotocolhack.util.VersionEnum;
public static final String DECODER_HANDLER_NAME = "via_decoder";
public static final String ENCODER_HANDLER_NAME = "via_encoder";
public static final String PRE_NETTY_ENCODER_HANDLER_NAME = "via-pre-netty_encoder";
public static final String PRE_NETTY_DECODER_HANDLER_NAME = "via-pre-netty_decoder";
public abstract class VPHPipeline extends ChannelInboundHandlerAdapter {
public static final String VIA_CODEC_NAME = "via-codec";
public static final String VIALEGACY_PRE_NETTY_LENGTH_CODEC_NAME = "vialegacy-pre-netty-length-codec";
public static final String VIABEDROCK_DISCONNECT_HANDLER_NAME = "viabedrock-disconnect-handler";
public static final String VIABEDROCK_FRAME_ENCAPSULATION_HANDLER_NAME = "viabedrock-frame-encapsulation";
public static final String VIABEDROCK_PACKET_ENCAPSULATION_HANDLER_NAME = "viabedrock-packet-encapsulation";
protected final UserConnection user;
protected final VersionEnum version;
public VPHPipeline(final UserConnection user, final VersionEnum version) {
this.user = user;
this.version = version;
}
@Override
public void handlerAdded(ChannelHandlerContext ctx) {
ctx.pipeline().addBefore(this.packetCodecName(), VIA_CODEC_NAME, this.createViaCodec());
if (this.version.isOlderThanOrEqualTo(VersionEnum.r1_6_4)) {
this.user.getProtocolInfo().getPipeline().add(PreNettyBaseProtocol.INSTANCE);
ctx.pipeline().addBefore(this.lengthCodecName(), VIALEGACY_PRE_NETTY_LENGTH_CODEC_NAME, this.createViaLegacyPreNettyLengthCodec());
} else if (this.version.equals(VersionEnum.bedrockLatest)) {
this.user.getProtocolInfo().getPipeline().add(BedrockBaseProtocol.INSTANCE);
ctx.pipeline().addBefore(this.lengthCodecName(), VIABEDROCK_DISCONNECT_HANDLER_NAME, this.createViaBedrockDisconnectHandler());
ctx.pipeline().addBefore(this.lengthCodecName(), VIABEDROCK_FRAME_ENCAPSULATION_HANDLER_NAME, this.createViaBedrockFrameEncapsulationHandler());
this.replaceLengthCodec(ctx, this.createViaBedrockBatchLengthCodec());
ctx.pipeline().addBefore(VIA_CODEC_NAME, VIABEDROCK_PACKET_ENCAPSULATION_HANDLER_NAME, this.createViaBedrockPacketEncapsulationHandler());
}
}
@Override
public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
if (CompressionReorderEvent.INSTANCE.equals(evt)) {
final ChannelPipeline pipeline = ctx.pipeline();
if (pipeline.names().indexOf(this.compressionCodecName()) > pipeline.names().indexOf(VIA_CODEC_NAME)) {
pipeline.addAfter(this.compressionCodecName(), VIA_CODEC_NAME, pipeline.remove(VIA_CODEC_NAME));
}
}
super.userEventTriggered(ctx, evt);
}
protected ChannelHandler createViaCodec() {
return new ViaCodec(this.user);
}
protected ChannelHandler createViaLegacyPreNettyLengthCodec() {
return new PreNettyLengthCodec(this.user);
}
protected ChannelHandler createViaBedrockDisconnectHandler() {
return new DisconnectHandler();
}
protected ChannelHandler createViaBedrockFrameEncapsulationHandler() {
return new RakMessageEncapsulationCodec();
}
protected ChannelHandler createViaBedrockBatchLengthCodec() {
return new BatchLengthCodec();
}
protected ChannelHandler createViaBedrockPacketEncapsulationHandler() {
return new PacketEncapsulationCodec();
}
protected void replaceLengthCodec(final ChannelHandlerContext ctx, final ChannelHandler handler) {
ctx.pipeline().replace(this.lengthCodecName(), this.lengthCodecName(), handler);
}
protected abstract String compressionCodecName();
protected abstract String packetCodecName();
protected abstract String lengthCodecName();
}

96
src/main/java/net/raphimc/viaprotocolhack/netty/ViaCodec.java Normal file
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@ -0,0 +1,96 @@
/*
* This file is part of ViaProtocolHack - https://github.com/RaphiMC/ViaProtocolHack
* Copyright (C) 2023 RK_01/RaphiMC and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.raphimc.viaprotocolhack.netty;
import com.viaversion.viaversion.api.connection.UserConnection;
import com.viaversion.viaversion.exception.CancelCodecException;
import com.viaversion.viaversion.exception.CancelDecoderException;
import com.viaversion.viaversion.exception.CancelEncoderException;
import com.viaversion.viaversion.util.PipelineUtil;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPromise;
import io.netty.handler.codec.ByteToMessageCodec;
import java.util.List;
public class ViaCodec extends ByteToMessageCodec<ByteBuf> {
protected final UserConnection user;
public ViaCodec(final UserConnection user) {
this.user = user;
}
@Override
protected void encode(ChannelHandlerContext ctx, ByteBuf in, ByteBuf out) throws Exception {
if (!this.user.checkOutgoingPacket()) throw CancelEncoderException.generate(null);
out.writeBytes(in);
if (this.user.shouldTransformPacket()) {
this.user.transformOutgoing(out, CancelEncoderException::generate);
}
}
@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
if (!this.user.checkIncomingPacket()) throw CancelDecoderException.generate(null);
final ByteBuf transformedBuf = ctx.alloc().buffer().writeBytes(in);
try {
if (this.user.shouldTransformPacket()) {
this.user.transformIncoming(transformedBuf, CancelDecoderException::generate);
}
out.add(transformedBuf.retain());
} finally {
transformedBuf.release();
}
}
@Override
public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
try {
super.write(ctx, msg, promise);
} catch (Throwable e) {
if (!PipelineUtil.containsCause(e, CancelCodecException.class)) {
throw e;
} else {
promise.setSuccess();
}
}
}
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
try {
super.channelRead(ctx, msg);
} catch (Throwable e) {
if (!PipelineUtil.containsCause(e, CancelCodecException.class)) {
throw e;
}
}
}
@Override
public boolean isSharable() {
// Netty doesn't allow codecs to be shared, but we need it to be shared because of the pipeline reordering.
// The check if it is sharable is done in the constructor and can be bypassed by returning false during that check.
return this.user != null;
}
}

38
src/main/java/net/raphimc/viaprotocolhack/netty/viabedrock/DisconnectHandler.java Normal file
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@ -0,0 +1,38 @@
/*
* This file is part of ViaProtocolHack - https://github.com/RaphiMC/ViaProtocolHack
* Copyright (C) 2023 RK_01/RaphiMC and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.raphimc.viaprotocolhack.netty.viabedrock;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelOutboundHandlerAdapter;
import io.netty.channel.ChannelPromise;
public class DisconnectHandler extends ChannelOutboundHandlerAdapter {
private boolean calledDisconnect = false;
@Override
public void close(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception {
if (ctx.channel().isActive() && !this.calledDisconnect) {
this.calledDisconnect = true;
ctx.disconnect(promise); // Send disconnect notification to the server and close the channel
} else {
super.close(ctx, promise);
}
}
}

64
src/main/java/net/raphimc/viaprotocolhack/netty/viabedrock/PingEncapsulationCodec.java Normal file
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@ -0,0 +1,64 @@
/*
* This file is part of ViaProtocolHack - https://github.com/RaphiMC/ViaProtocolHack
* Copyright (C) 2023 RK_01/RaphiMC and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.raphimc.viaprotocolhack.netty.viabedrock;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageCodec;
import org.cloudburstmc.netty.channel.raknet.RakConstants;
import org.cloudburstmc.netty.channel.raknet.RakPing;
import org.cloudburstmc.netty.channel.raknet.RakPong;
import java.net.InetSocketAddress;
import java.util.List;
public class PingEncapsulationCodec extends MessageToMessageCodec<RakPong, ByteBuf> {
private final InetSocketAddress remoteAddress;
public PingEncapsulationCodec(final InetSocketAddress remoteAddress) {
this.remoteAddress = remoteAddress;
}
@Override
protected void encode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) {
final int packetId = in.readUnsignedByte();
if (packetId == RakConstants.ID_UNCONNECTED_PING) {
out.add(new RakPing(in.readLong(), this.remoteAddress));
} else {
ctx.close();
throw new IllegalStateException("Unexpected packet ID: " + packetId);
}
}
@Override
protected void decode(ChannelHandlerContext ctx, RakPong in, List<Object> out) {
if (!this.remoteAddress.equals(in.getSender())) {
ctx.close();
throw new IllegalStateException("Received pong from unexpected address: " + in.getSender());
}
final ByteBuf buf = ctx.alloc().buffer();
buf.writeByte(RakConstants.ID_UNCONNECTED_PONG);
buf.writeLong(in.getPingTime());
buf.writeBytes(in.getPongData());
out.add(buf);
}
}

61
src/main/java/net/raphimc/viaprotocolhack/netty/viabedrock/RakMessageEncapsulationCodec.java Normal file
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@ -0,0 +1,61 @@
/*
* This file is part of ViaProtocolHack - https://github.com/RaphiMC/ViaProtocolHack
* Copyright (C) 2023 RK_01/RaphiMC and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.raphimc.viaprotocolhack.netty.viabedrock;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.CompositeByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageCodec;
import org.cloudburstmc.netty.channel.raknet.RakReliability;
import org.cloudburstmc.netty.channel.raknet.packet.RakMessage;
import java.util.List;
public class RakMessageEncapsulationCodec extends MessageToMessageCodec<RakMessage, ByteBuf> {
private static final int FRAME_ID = 0xFE;
@Override
protected void encode(ChannelHandlerContext ctx, ByteBuf msg, List<Object> out) {
final CompositeByteBuf buf = ctx.alloc().compositeBuffer(2);
try {
buf.addComponent(true, ctx.alloc().ioBuffer(1).writeByte(FRAME_ID));
buf.addComponent(true, msg.retainedSlice());
out.add(buf.retain());
} finally {
buf.release();
}
}
@Override
protected void decode(ChannelHandlerContext ctx, RakMessage msg, List<Object> out) {
if (msg.channel() != 0 && msg.reliability() != RakReliability.RELIABLE_ORDERED) {
return;
}
final ByteBuf in = msg.content();
if (!in.isReadable()) {
return;
}
final int id = in.readUnsignedByte();
if (id != FRAME_ID) {
throw new IllegalStateException("Invalid frame ID: " + id);
}
out.add(in.readRetainedSlice(in.readableBytes()));
}
}