80 lines
2.6 KiB
Java
80 lines
2.6 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;
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import org.bukkit.entity.Player;
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import fr.neatmonster.nocheatplus.checks.Check;
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import fr.neatmonster.nocheatplus.checks.CheckType;
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import fr.neatmonster.nocheatplus.utilities.TickTask;
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/**
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* Fall-back check for pre 1.9: Limit the overall packet frequency, aiming at
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* crash exploits only. Thus the default actions should be kicking, as this
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* won't distinguish type of packets with the global packet count.
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*
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* @author asofold
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*
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*/
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public class PacketFrequency extends Check {
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public PacketFrequency() {
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super(CheckType.NET_PACKETFREQUENCY);
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}
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/**
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* Actual state.
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*
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* @param player
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* @param data
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*
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* @param cc
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*
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* @return If to cancel a packet event.
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*/
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public boolean check(final Player player, final NetData data, final NetConfig cc) {
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data.packetFrequency.add(System.currentTimeMillis(), 1f);
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final long fDur = data.packetFrequency.bucketDuration() * data.packetFrequency.numberOfBuckets();
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double amount = data.packetFrequency.score(1f) * 1000f / (float) fDur;
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// if (data.debug) {
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// debug(player, "Basic amount: " + amount);
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// }
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if (amount > cc.packetFrequencyPacketsPerSecond) {
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amount /= TickTask.getLag(fDur);
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if (amount > cc.packetFrequencyPacketsPerSecond) {
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if (executeActions(player, amount - cc.packetFrequencyPacketsPerSecond, 1.0, cc.packetFrequencyActions).willCancel()) {
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return true;
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}
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}
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}
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return false; // Cancel state.
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}
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/**
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* Allow to relax the count by 1, e.g. with outgoing teleport.
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*
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* @param player
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* @param data
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*
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* @param cc
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*
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* @return
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*/
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public void relax(final Player player, final NetData data, final NetConfig cc) {
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// TODO: Concept (not more locking, instead a counter (optimistic)).
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}
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}
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