132 lines
5.7 KiB
Java
132 lines
5.7 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 com.viaversion.viaversion.protocols.base;
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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.platform.providers.ViaProviders;
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import com.viaversion.viaversion.api.protocol.AbstractSimpleProtocol;
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import com.viaversion.viaversion.api.protocol.ProtocolPathEntry;
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import com.viaversion.viaversion.api.protocol.ProtocolPipeline;
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import com.viaversion.viaversion.api.protocol.Protocol;
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import com.viaversion.viaversion.api.protocol.packet.Direction;
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import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
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import com.viaversion.viaversion.api.protocol.packet.State;
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import com.viaversion.viaversion.api.protocol.remapper.PacketRemapper;
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import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
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import com.viaversion.viaversion.api.protocol.version.VersionProvider;
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import com.viaversion.viaversion.api.type.Type;
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import java.util.ArrayList;
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import java.util.List;
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public class BaseProtocol extends AbstractSimpleProtocol {
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@Override
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protected void registerPackets() {
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/* Incoming Packets */
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// Handshake Packet
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registerIncoming(State.HANDSHAKE, 0x00, 0x00, new PacketRemapper() {
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@Override
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public void registerMap() {
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handler(wrapper -> {
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int protocolVersion = wrapper.passthrough(Type.VAR_INT);
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wrapper.passthrough(Type.STRING); // Server Address
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wrapper.passthrough(Type.UNSIGNED_SHORT); // Server Port
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int state = wrapper.passthrough(Type.VAR_INT);
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ProtocolInfo info = wrapper.user().getProtocolInfo();
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info.setProtocolVersion(protocolVersion);
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// Ensure the server has a version provider
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if (Via.getManager().getProviders().get(VersionProvider.class) == null) {
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wrapper.user().setActive(false);
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return;
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}
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// Choose the pipe
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int serverProtocol = Via.getManager().getProviders().get(VersionProvider.class).getClosestServerProtocol(wrapper.user());
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info.setServerProtocolVersion(serverProtocol);
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List<ProtocolPathEntry> protocolPath = null;
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// Only allow newer clients (or 1.9.2 on 1.9.4 server if the server supports it)
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if (info.getProtocolVersion() >= serverProtocol || Via.getPlatform().isOldClientsAllowed()) {
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protocolPath = Via.getManager().getProtocolManager().getProtocolPath(info.getProtocolVersion(), serverProtocol);
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}
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ProtocolPipeline pipeline = wrapper.user().getProtocolInfo().getPipeline();
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if (protocolPath != null) {
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List<Protocol> protocols = new ArrayList<>(protocolPath.size());
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for (ProtocolPathEntry entry : protocolPath) {
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protocols.add(entry.getProtocol());
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// Ensure mapping data has already been loaded
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Via.getManager().getProtocolManager().completeMappingDataLoading(entry.getProtocol().getClass());
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}
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// Add protocols to pipeline
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pipeline.add(protocols);
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// Set the original snapshot version if present
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ProtocolVersion protocol = ProtocolVersion.getProtocol(serverProtocol);
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wrapper.set(Type.VAR_INT, 0, protocol.getOriginalVersion());
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}
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// Add Base Protocol
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pipeline.add(Via.getManager().getProtocolManager().getBaseProtocol(serverProtocol));
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// Change state
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if (state == 1) {
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info.setState(State.STATUS);
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}
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if (state == 2) {
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info.setState(State.LOGIN);
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}
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});
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}
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});
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}
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@Override
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public boolean isBaseProtocol() {
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return true;
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}
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@Override
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public void init(UserConnection userConnection) {
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// Nothing gets added, ProtocolPipeline handles ProtocolInfo
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}
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@Override
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public void register(ViaProviders providers) {
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providers.register(VersionProvider.class, new BaseVersionProvider());
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}
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@Override
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public void transform(Direction direction, State state, PacketWrapper packetWrapper) throws Exception {
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super.transform(direction, state, packetWrapper);
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if (direction == Direction.INCOMING && state == State.HANDSHAKE) {
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// Disable if it isn't a handshake packet.
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if (packetWrapper.getId() != 0) {
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packetWrapper.user().setActive(false);
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}
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}
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}
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}
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