77 lines
3.2 KiB
Java
77 lines
3.2 KiB
Java
/*
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* This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
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* Copyright (C) 2016-2024 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 com.viaversion.viaversion.bungee.providers;
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import com.google.common.collect.Lists;
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import com.viaversion.viaversion.api.Via;
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import com.viaversion.viaversion.api.connection.ProtocolInfo;
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import com.viaversion.viaversion.api.connection.UserConnection;
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import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
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import com.viaversion.viaversion.protocols.base.BaseVersionProvider;
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import com.viaversion.viaversion.util.ReflectionUtil;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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import net.md_5.bungee.api.ProxyServer;
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import net.md_5.bungee.protocol.ProtocolConstants;
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public class BungeeVersionProvider extends BaseVersionProvider {
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@Override
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public int getClosestServerProtocol(UserConnection user) throws Exception {
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// TODO Have one constant list forever until restart? (Might limit plugins if they change this)
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List<Integer> list = ReflectionUtil.getStatic(ProtocolConstants.class, "SUPPORTED_VERSION_IDS", List.class);
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List<Integer> sorted = new ArrayList<>(list);
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Collections.sort(sorted);
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ProtocolInfo info = user.getProtocolInfo();
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// Bungee supports it
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if (sorted.contains(info.getProtocolVersion()))
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return info.getProtocolVersion();
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// Older than bungee supports, get the lowest version
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if (info.getProtocolVersion() < sorted.get(0)) {
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return getLowestSupportedVersion();
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}
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// Loop through all protocols to get the closest protocol id that bungee supports (and that viaversion does too)
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// TODO: This needs a better fix, i.e checking ProtocolRegistry to see if it would work.
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// This is more of a workaround for snapshot support by bungee.
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for (Integer protocol : Lists.reverse(sorted)) {
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if (info.getProtocolVersion() > protocol && ProtocolVersion.isRegistered(protocol))
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return protocol;
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}
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Via.getPlatform().getLogger().severe("Panic, no protocol id found for " + info.getProtocolVersion());
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return info.getProtocolVersion();
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}
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public static int getLowestSupportedVersion() {
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List<Integer> list;
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try {
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list = ReflectionUtil.getStatic(ProtocolConstants.class, "SUPPORTED_VERSION_IDS", List.class);
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return list.get(0);
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} catch (NoSuchFieldException | IllegalAccessException ignored) {
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// Fallback
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return ProxyServer.getInstance().getProtocolVersion();
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}
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}
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}
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