89 lines
3.5 KiB
Java
89 lines
3.5 KiB
Java
/*
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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 fr.neatmonster.nocheatplus.checks.net.protocollib;
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import java.util.Arrays;
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import org.bukkit.entity.Player;
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import org.bukkit.plugin.Plugin;
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import com.comphenix.protocol.PacketType;
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import com.comphenix.protocol.events.ListenerPriority;
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import com.comphenix.protocol.events.PacketEvent;
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import fr.neatmonster.nocheatplus.NCPAPIProvider;
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import fr.neatmonster.nocheatplus.checks.CheckType;
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import fr.neatmonster.nocheatplus.checks.net.KeepAliveFrequency;
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import fr.neatmonster.nocheatplus.checks.net.NetConfig;
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import fr.neatmonster.nocheatplus.checks.net.NetData;
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import fr.neatmonster.nocheatplus.players.DataManager;
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import fr.neatmonster.nocheatplus.players.IPlayerData;
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/**
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* Limit keep alive packet frequency, set lastKeepAliveTime (even if disabled,
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* in case fight.godmode is enabled).
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*
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* @author asofold
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*
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*/
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public class KeepAliveAdapter extends BaseAdapter {
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/** Dummy check for bypass checking and actions execution. */
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private final KeepAliveFrequency frequencyCheck = new KeepAliveFrequency();
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public KeepAliveAdapter(Plugin plugin) {
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super(plugin, ListenerPriority.LOW, PacketType.Play.Client.KEEP_ALIVE);
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this.checkType = CheckType.NET_KEEPALIVEFREQUENCY;
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// Add feature tags for checks.
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if (NCPAPIProvider.getNoCheatPlusAPI().getWorldDataManager().isActiveAnywhere(
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CheckType.NET_KEEPALIVEFREQUENCY)) {
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NCPAPIProvider.getNoCheatPlusAPI().addFeatureTags(
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"checks", Arrays.asList(KeepAliveFrequency.class.getSimpleName()));
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}
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NCPAPIProvider.getNoCheatPlusAPI().addComponent(frequencyCheck);
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}
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@Override
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public void onPacketReceiving(final PacketEvent event) {
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final long time = System.currentTimeMillis();
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final Player player = event.getPlayer();
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if (player == null) {
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counters.add(ProtocolLibComponent.idNullPlayer, 1);
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event.setCancelled(true);
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return;
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}
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// Always update last received time.
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final IPlayerData pData = DataManager.getPlayerData(player);
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final NetData data = pData.getGenericInstance(NetData.class);
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data.lastKeepAliveTime = time;
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final NetConfig cc = pData.getGenericInstance(NetConfig.class);
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// Run check(s).
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// TODO: Match vs. outgoing keep alive requests.
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// TODO: Better modeling of actual packet sequences (flying vs. keep alive vs. request/ping).
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// TODO: Better integration with god-mode check / trigger reset ndt.
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if (frequencyCheck.isEnabled(player, pData)
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&& frequencyCheck.check(player, time, data, cc, pData)) {
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event.setCancelled(true);
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}
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}
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@Override
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public void onPacketSending(PacketEvent event) {
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// TODO: Maybe detect if keep alive wasn't asked for + allow cancel.
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}
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}
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