116 lines
4.9 KiB
Java
116 lines
4.9 KiB
Java
/*
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This file is part of the OdinMS Maple Story Server
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Copyright (C) 2008 Patrick Huy <patrick.huy@frz.cc>
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Matthias Butz <matze@odinms.de>
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Jan Christian Meyer <vimes@odinms.de>
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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 Affero General Public License as
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published by the Free Software Foundation version 3 as published by
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the Free Software Foundation. You may not use, modify or distribute
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this program under any other version of the GNU Affero General Public
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License.
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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 Affero General Public License for more details.
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You should have received a copy of the GNU Affero 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 net.server.channel.handlers;
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import client.MapleCharacter;
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import client.MapleClient;
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import client.autoban.AutobanFactory;
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import client.status.MonsterStatus;
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import client.status.MonsterStatusEffect;
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import net.AbstractMaplePacketHandler;
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import net.packet.InPacket;
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import server.life.MapleMonster;
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import server.life.MapleMonsterInformationProvider;
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import server.maps.MapleMap;
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import tools.FilePrinter;
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import tools.PacketCreator;
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import java.util.Map;
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/**
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*
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* @author Jay Estrella
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* @author Ronan
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*/
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public final class MobDamageMobHandler extends AbstractMaplePacketHandler {
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@Override
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public final void handlePacket(InPacket p, MapleClient c) {
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int from = p.readInt();
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p.readInt();
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int to = p.readInt();
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boolean magic = p.readByte() == 0;
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int dmg = p.readInt();
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MapleCharacter chr = c.getPlayer();
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MapleMap map = chr.getMap();
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MapleMonster attacker = map.getMonsterByOid(from);
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MapleMonster damaged = map.getMonsterByOid(to);
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if (attacker != null && damaged != null) {
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int maxDmg = calcMaxDamage(attacker, damaged, magic); // thanks Darter (YungMoozi) for reporting unchecked dmg
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if (dmg > maxDmg) {
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AutobanFactory.DAMAGE_HACK.alert(c.getPlayer(), "Possible packet editing hypnotize damage exploit."); // thanks Rien dev team
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FilePrinter.printError(FilePrinter.EXPLOITS + c.getPlayer().getName() + ".txt", c.getPlayer().getName() + " had hypnotized " + MapleMonsterInformationProvider.getInstance().getMobNameFromId(attacker.getId()) + " to attack " + MapleMonsterInformationProvider.getInstance().getMobNameFromId(damaged.getId()) + " with damage " + dmg + " (max: " + maxDmg + ")");
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dmg = maxDmg;
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}
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map.damageMonster(chr, damaged, dmg);
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map.broadcastMessage(chr, PacketCreator.damageMonster(to, dmg), false);
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}
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}
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private static int calcMaxDamage(MapleMonster attacker, MapleMonster damaged, boolean magic) {
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int attackerAtk, damagedDef, attackerLevel = attacker.getLevel();
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double maxDamage;
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if (magic) {
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int atkRate = calcModifier(attacker, MonsterStatus.MAGIC_ATTACK_UP, MonsterStatus.MATK);
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attackerAtk = (attacker.getStats().getMADamage() * atkRate) / 100;
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int defRate = calcModifier(damaged, MonsterStatus.MAGIC_DEFENSE_UP, MonsterStatus.MDEF);
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damagedDef = (damaged.getStats().getMDDamage() * defRate) / 100;
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maxDamage = ((attackerAtk * (1.15 + (0.025 * attackerLevel))) - (0.75 * damagedDef)) * (Math.log(Math.abs(damagedDef - attackerAtk)) / Math.log(12));
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} else {
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int atkRate = calcModifier(attacker, MonsterStatus.WEAPON_ATTACK_UP, MonsterStatus.WATK);
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attackerAtk = (attacker.getStats().getPADamage() * atkRate) / 100;
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int defRate = calcModifier(damaged, MonsterStatus.WEAPON_DEFENSE_UP, MonsterStatus.WDEF);
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damagedDef = (damaged.getStats().getPDDamage() * defRate) / 100;
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maxDamage = ((attackerAtk * (1.15 + (0.025 * attackerLevel))) - (0.75 * damagedDef)) * (Math.log(Math.abs(damagedDef - attackerAtk)) / Math.log(17));
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}
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return (int) maxDamage;
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}
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private static int calcModifier(MapleMonster monster, MonsterStatus buff, MonsterStatus nerf) {
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int atkModifier;
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final Map<MonsterStatus, MonsterStatusEffect> monsterStati = monster.getStati();
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MonsterStatusEffect atkBuff = monsterStati.get(buff);
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if (atkBuff != null) {
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atkModifier = atkBuff.getStati().get(buff);
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} else {
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atkModifier = 100;
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}
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MonsterStatusEffect atkNerf = monsterStati.get(nerf);
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if (atkNerf != null) {
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atkModifier -= atkNerf.getStati().get(nerf);
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}
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return atkModifier;
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}
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}
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