142 lines
5.6 KiB
Java
142 lines
5.6 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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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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package us.myles.ViaVersion.api.platform;
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import io.netty.channel.ChannelFutureListener;
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import org.checkerframework.checker.nullness.qual.Nullable;
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import us.myles.ViaVersion.api.Via;
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import us.myles.ViaVersion.api.data.UserConnection;
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import java.util.Collections;
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import java.util.Map;
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import java.util.Objects;
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import java.util.Set;
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import java.util.UUID;
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import java.util.concurrent.ConcurrentHashMap;
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/**
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* Handles injected UserConnections
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*/
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public class ViaConnectionManager {
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protected final Map<UUID, UserConnection> clients = new ConcurrentHashMap<>();
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protected final Set<UserConnection> connections = Collections.newSetFromMap(new ConcurrentHashMap<>());
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public void onLoginSuccess(UserConnection connection) {
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Objects.requireNonNull(connection, "connection is null!");
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connections.add(connection);
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if (isFrontEnd(connection)) {
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UUID id = connection.getProtocolInfo().getUuid();
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if (clients.put(id, connection) != null) {
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Via.getPlatform().getLogger().warning("Duplicate UUID on frontend connection! (" + id + ")");
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}
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}
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if (connection.getChannel() != null) {
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connection.getChannel().closeFuture().addListener((ChannelFutureListener) future -> onDisconnect(connection));
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}
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}
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public void onDisconnect(UserConnection connection) {
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Objects.requireNonNull(connection, "connection is null!");
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connections.remove(connection);
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if (isFrontEnd(connection)) {
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UUID id = connection.getProtocolInfo().getUuid();
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clients.remove(id);
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}
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}
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/**
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* Frontend connections will have the UUID stored. Override this if your platform isn't always frontend.
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* UUIDs can't be duplicate between frontend connections.
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*/
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public boolean isFrontEnd(UserConnection conn) {
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return !conn.isClientSide();
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}
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/**
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* Returns a map containing the UUIDs and frontend UserConnections from players connected to this proxy server
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* Returns empty list when there isn't a server
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* When ViaVersion is reloaded, this method may not return some players.
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* May not contain ProtocolSupport players.
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*/
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public Map<UUID, UserConnection> getConnectedClients() {
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return Collections.unmodifiableMap(clients);
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}
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/**
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* Returns the frontend UserConnection from the player connected to this proxy server
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* Returns null when there isn't a server or connection was not found
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* When ViaVersion is reloaded, this method may not return some players.
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* May not return ProtocolSupport players.
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* <p>
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* Note that connections are removed as soon as their channel is closed,
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* so avoid using this method during player quits for example.
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*/
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public @Nullable UserConnection getConnectedClient(UUID clientIdentifier) {
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return clients.get(clientIdentifier);
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}
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/**
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* Returns the UUID from the frontend connection to this proxy server
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* Returns null when there isn't a server or this connection isn't frontend or it doesn't have an id
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* When ViaVersion is reloaded, this method may not return some players.
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* May not return ProtocolSupport players.
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* <p>
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* Note that connections are removed as soon as their channel is closed,
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* so avoid using this method during player quits for example.
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*/
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public @Nullable UUID getConnectedClientId(UserConnection conn) {
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if (conn.getProtocolInfo() == null) return null;
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UUID uuid = conn.getProtocolInfo().getUuid();
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UserConnection client = clients.get(uuid);
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if (conn.equals(client)) {
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// This is frontend
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return uuid;
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}
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return null;
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}
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/**
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* Returns all UserConnections which are registered
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* May contain duplicated UUIDs on multiple ProtocolInfo.
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* May contain frontend, backend and/or client-sided connections.
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* When ViaVersion is reloaded, this method may not return some players.
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* May not contain ProtocolSupport players.
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*/
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public Set<UserConnection> getConnections() {
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return Collections.unmodifiableSet(connections);
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}
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/**
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* Returns if Via injected into this player connection.
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*
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* @param playerId player uuid
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* @return true if the player is handled by Via
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*/
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public boolean isClientConnected(UUID playerId) {
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return clients.containsKey(playerId);
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}
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}
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