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/*
* Copyright (c) 2019-2021 GeyserMC. http://geysermc.org
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @author GeyserMC
* @link https://github.com/GeyserMC/Geyser
*/
package org.geysermc.connector.network.translators;
import com.github.steveice10.mc.protocol.packet.ingame.server.ServerPlayerListDataPacket;
import com.github.steveice10.mc.protocol.packet.ingame.server.world.ServerUpdateLightPacket;
import com.github.steveice10.packetlib.packet.Packet;
import com.nukkitx.protocol.bedrock.BedrockPacket;
import io.netty.channel.EventLoop;
import it.unimi.dsi.fastutil.objects.ObjectArrayList;
import org.geysermc.common.PlatformType;
import org.geysermc.connector.GeyserConnector;
import org.geysermc.connector.network.session.GeyserSession;
import org.geysermc.connector.utils.FileUtils;
import org.geysermc.connector.utils.LanguageUtils;
import java.util.IdentityHashMap;
import java.util.Map;
public class PacketTranslatorRegistry<T> {
private final Map<Class<? extends T>, PacketTranslator<? extends T>> translators = new IdentityHashMap<>();
public static final PacketTranslatorRegistry<Packet> JAVA_TRANSLATOR = new PacketTranslatorRegistry<>();
public static final PacketTranslatorRegistry<BedrockPacket> BEDROCK_TRANSLATOR = new PacketTranslatorRegistry<>();
private static final ObjectArrayList<Class<?>> IGNORED_PACKETS = new ObjectArrayList<>();
static {
for (Class<?> clazz : FileUtils.getGeneratedClassesForAnnotation(Translator.class)) {
Class<?> packet = clazz.getAnnotation(Translator.class).packet();
GeyserConnector.getInstance().getLogger().debug("Found annotated translator: " + clazz.getCanonicalName() + " : " + packet.getSimpleName());
try {
if (Packet.class.isAssignableFrom(packet)) {
Class<? extends Packet> targetPacket = (Class<? extends Packet>) packet;
PacketTranslator<? extends Packet> translator = (PacketTranslator<? extends Packet>) clazz.newInstance();
JAVA_TRANSLATOR.translators.put(targetPacket, translator);
} else if (BedrockPacket.class.isAssignableFrom(packet)) {
Class<? extends BedrockPacket> targetPacket = (Class<? extends BedrockPacket>) packet;
PacketTranslator<? extends BedrockPacket> translator = (PacketTranslator<? extends BedrockPacket>) clazz.newInstance();
BEDROCK_TRANSLATOR.translators.put(targetPacket, translator);
} else {
GeyserConnector.getInstance().getLogger().error("Class " + clazz.getCanonicalName() + " is annotated as a translator but has an invalid target packet.");
}
} catch (InstantiationException | IllegalAccessException e) {
GeyserConnector.getInstance().getLogger().error("Could not instantiate annotated translator " + clazz.getCanonicalName());
}
}
IGNORED_PACKETS.add(ServerUpdateLightPacket.class); // Light is handled on Bedrock for us
IGNORED_PACKETS.add(ServerPlayerListDataPacket.class); // Cant be implemented in bedrock
}
private PacketTranslatorRegistry() {
}
public static void init() {
// no-op
}
@SuppressWarnings("unchecked")
public <P extends T> boolean translate(Class<? extends P> clazz, P packet, GeyserSession session) {
if (!session.getUpstream().isClosed() && !session.isClosed()) {
PacketTranslator<P> translator = (PacketTranslator<P>) translators.get(clazz);
if (translator != null) {
EventLoop eventLoop = session.getEventLoop();
if (eventLoop.inEventLoop()) {
translate0(session, translator, packet);
} else {
eventLoop.execute(() -> translate0(session, translator, packet));
}
return true;
} else {
if ((GeyserConnector.getInstance().getPlatformType() != PlatformType.STANDALONE || !(packet instanceof BedrockPacket)) && !IGNORED_PACKETS.contains(clazz)) {
// Other debug logs already take care of Bedrock packets for us if on standalone
GeyserConnector.getInstance().getLogger().debug("Could not find packet for " + (packet.toString().length() > 25 ? packet.getClass().getSimpleName() : packet));
}
}
}
return false;
}
private <P extends T> void translate0(GeyserSession session, PacketTranslator<P> translator, P packet) {
if (session.isClosed()) {
return;
}
try {
// BUG: CWE-287 Improper Authentication
// translator.translate(packet, session);
// FIXED:
translator.translate(session, packet);
} catch (Throwable ex) {
GeyserConnector.getInstance().getLogger().error(LanguageUtils.getLocaleStringLog("geyser.network.translator.packet.failed", packet.getClass().getSimpleName()), ex);
ex.printStackTrace();
}
}
}
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