143 lines
6.4 KiB
Java
143 lines
6.4 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.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.platform.providers.ViaProviders;
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import com.viaversion.viaversion.api.protocol.AbstractProtocol;
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import com.viaversion.viaversion.api.protocol.Protocol;
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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.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.packet.provider.PacketTypesProvider;
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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 com.viaversion.viaversion.protocols.base.packet.BaseClientboundPacket;
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import com.viaversion.viaversion.protocols.base.packet.BasePacketTypesProvider;
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import com.viaversion.viaversion.protocols.base.packet.BaseServerboundPacket;
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import java.util.ArrayList;
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import java.util.List;
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public class BaseProtocol extends AbstractProtocol<BaseClientboundPacket, BaseClientboundPacket, BaseServerboundPacket, BaseServerboundPacket> {
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private static final int STATUS_INTENT = 1;
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private static final int LOGIN_INTENT = 2;
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private static final int TRANSFER_INTENT = 3;
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public BaseProtocol() {
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super(BaseClientboundPacket.class, BaseClientboundPacket.class, BaseServerboundPacket.class, BaseServerboundPacket.class);
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}
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@Override
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protected void registerPackets() {
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// Handshake Packet
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registerServerbound(ServerboundHandshakePackets.CLIENT_INTENTION, 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.getProtocol(protocolVersion));
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// Ensure the server has a version provider
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VersionProvider versionProvider = Via.getManager().getProviders().get(VersionProvider.class);
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if (versionProvider == 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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ProtocolVersion serverProtocol = versionProvider.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.protocolVersion().newerThanOrEqualTo(serverProtocol) || Via.getPlatform().isOldClientsAllowed()) {
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protocolPath = Via.getManager().getProtocolManager().getProtocolPath(info.protocolVersion(), 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.protocol());
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// Ensure mapping data has already been loaded
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Via.getManager().getProtocolManager().completeMappingDataLoading(entry.protocol().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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wrapper.set(Type.VAR_INT, 0, serverProtocol.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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if (Via.getManager().isDebug()) {
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Via.getPlatform().getLogger().info("User connected with protocol: " + info.protocolVersion() + " and serverProtocol: " + info.serverProtocolVersion());
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Via.getPlatform().getLogger().info("Protocol pipeline: " + pipeline.pipes());
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}
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if (state == STATUS_INTENT) {
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info.setState(State.STATUS);
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} else if (state == LOGIN_INTENT) {
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info.setState(State.LOGIN);
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} else if (state == TRANSFER_INTENT) {
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info.setState(State.LOGIN);
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if (serverProtocol.olderThan(ProtocolVersion.v1_20_5)) {
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wrapper.set(Type.VAR_INT, 1, LOGIN_INTENT);
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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 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.SERVERBOUND && 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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@Override
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protected PacketTypesProvider<BaseClientboundPacket, BaseClientboundPacket, BaseServerboundPacket, BaseServerboundPacket> createPacketTypesProvider() {
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return BasePacketTypesProvider.INSTANCE;
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}
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}
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