115 lines
4.3 KiB
Java
115 lines
4.3 KiB
Java
/*
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* This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
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* Copyright (C) 2016-2021 ViaVersion 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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package us.myles.ViaVersion.bungee.platform;
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import com.google.gson.JsonObject;
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import io.netty.channel.Channel;
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import io.netty.channel.ChannelInitializer;
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import it.unimi.dsi.fastutil.ints.IntLinkedOpenHashSet;
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import it.unimi.dsi.fastutil.ints.IntSortedSet;
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import us.myles.ViaVersion.api.Via;
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import us.myles.ViaVersion.api.platform.ViaInjector;
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import us.myles.ViaVersion.bungee.handlers.BungeeChannelInitializer;
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import us.myles.ViaVersion.compatibility.ForcefulFieldModifier;
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import us.myles.ViaVersion.compatibility.unsafe.UnsafeBackedForcefulFieldModifier;
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import us.myles.ViaVersion.util.ReflectionUtil;
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import java.lang.reflect.Field;
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import java.util.List;
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public class BungeeViaInjector implements ViaInjector {
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private final ForcefulFieldModifier forcefulFieldModifier;
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public BungeeViaInjector() {
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try {
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this.forcefulFieldModifier = new UnsafeBackedForcefulFieldModifier();
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} catch (final ReflectiveOperationException ex) {
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throw new IllegalStateException("Cannot create a modifier accessor", ex);
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}
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}
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@Override
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public void inject() throws Exception {
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try {
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Class<?> pipelineUtils = Class.forName("net.md_5.bungee.netty.PipelineUtils");
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Field field = pipelineUtils.getDeclaredField("SERVER_CHILD");
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field.setAccessible(true);
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BungeeChannelInitializer newInit = new BungeeChannelInitializer((ChannelInitializer<Channel>) field.get(null));
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this.forcefulFieldModifier.setField(field, null, newInit);
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} catch (Exception e) {
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Via.getPlatform().getLogger().severe("Unable to inject ViaVersion, please post these details on our GitHub and ensure you're using a compatible server version.");
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throw e;
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}
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}
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@Override
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public void uninject() {
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Via.getPlatform().getLogger().severe("ViaVersion cannot remove itself from Bungee without a reboot!");
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}
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@Override
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public int getServerProtocolVersion() throws Exception {
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return getBungeeSupportedVersions().get(0);
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}
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@Override
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public IntSortedSet getServerProtocolVersions() throws Exception {
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return new IntLinkedOpenHashSet(getBungeeSupportedVersions());
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}
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private List<Integer> getBungeeSupportedVersions() throws Exception {
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return ReflectionUtil.getStatic(Class.forName("net.md_5.bungee.protocol.ProtocolConstants"), "SUPPORTED_VERSION_IDS", List.class);
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}
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@Override
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public String getEncoderName() {
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return "via-encoder";
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}
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@Override
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public String getDecoderName() {
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return "via-decoder";
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}
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private ChannelInitializer<Channel> getChannelInitializer() throws Exception {
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Class<?> pipelineUtils = Class.forName("net.md_5.bungee.netty.PipelineUtils");
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Field field = pipelineUtils.getDeclaredField("SERVER_CHILD");
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field.setAccessible(true);
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return (ChannelInitializer<Channel>) field.get(null);
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}
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@Override
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public JsonObject getDump() {
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JsonObject data = new JsonObject();
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try {
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ChannelInitializer<Channel> initializer = getChannelInitializer();
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data.addProperty("currentInitializer", initializer.getClass().getName());
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if (initializer instanceof BungeeChannelInitializer) {
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data.addProperty("originalInitializer", ((BungeeChannelInitializer) initializer).getOriginal().getClass().getName());
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}
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} catch (Exception e) {
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// Ignored, not printed in the dump
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}
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return data;
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}
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}
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