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Peijun Zhao
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package com.aluer.anticheat;
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import com.aluer.config.ServerGuardConfig;
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import com.aluer.service.RconClient;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.stereotype.Component;
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import java.time.LocalDateTime;
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import java.util.*;
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import java.util.concurrent.ConcurrentHashMap;
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@Component
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public class AntiCheatService {
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private static final Logger logger = LoggerFactory.getLogger(AntiCheatService.class);
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private final ServerGuardConfig config;
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private final RconClient rconClient;
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private final Map<String, PlayerCheatData> playerData = new ConcurrentHashMap<>();
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private final List<CheatAlert> alerts = new ArrayList<>();
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private static final String[] SUSPICIOUS_COMPOUNDS = {
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"diamond_sword", "diamond_helmet", "diamond_chestplate",
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"diamond_leggings", "diamond_boots", "netherite_"
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};
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private static final String[] SPEED_HACK_PATTERNS = {
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"fly", "speed", "jesus", "waterwalk"
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};
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private static final String[] KILLAURA_PATTERNS = {
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"hit", "attack", "reach", "crit"
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};
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public AntiCheatService(ServerGuardConfig config, RconClient rconClient) {
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this.config = config;
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this.rconClient = rconClient;
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}
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public void recordPlayerMovement(String playerName, double x, double y, double z, boolean onGround) {
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PlayerCheatData data = playerData.computeIfAbsent(playerName, k -> new PlayerCheatData(playerName));
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data.recordPosition(x, y, z, onGround);
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checkSpeedHack(playerName, data);
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checkFlyHack(playerName, data);
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}
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public void recordPlayerCombat(String playerName, String target, double damage) {
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PlayerCheatData data = playerData.computeIfAbsent(playerName, k -> new PlayerCheatData(playerName));
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data.recordAttack(target, damage);
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checkReachHack(playerName, data);
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checkKillAura(data);
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}
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public void recordPlayerInventory(String playerName, String item, int slot) {
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PlayerCheatData data = playerData.computeIfAbsent(playerName, k -> new PlayerCheatData(playerName));
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data.recordInventoryChange(item, slot);
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checkInventoryHack(playerName, data);
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}
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public void recordBlockPlace(String playerName, String blockType, int x, int y, int z) {
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PlayerCheatData data = playerData.computeIfAbsent(playerName, k -> new PlayerCheatData(playerName));
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data.recordBlockPlace(blockType, x, y, z);
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checkScaffold(playerName, data);
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}
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private void checkSpeedHack(String playerName, PlayerCheatData data) {
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double speed = data.getMovementSpeed();
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if (speed > 0.5) {
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addAlert(playerName, "SpeedHack", "Movement speed: " + speed, 0.7);
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}
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}
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private void checkFlyHack(String playerName, PlayerCheatData data) {
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if (data.isFlying() && !data.hasBlockBelow()) {
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addAlert(playerName, "FlyHack", "Flying without ground", 0.8);
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}
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if (data.getVerticalSpeed() > 0.3) {
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addAlert(playerName, "FlyHack", "Vertical speed: " + data.getVerticalSpeed(), 0.6);
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}
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}
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private void checkReachHack(String playerName, PlayerCheatData data) {
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double reach = data.getAttackReach();
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if (reach > 3.5) {
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addAlert(playerName, "ReachHack", "Attack reach: " + reach, 0.75);
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}
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}
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private void checkKillAura(PlayerCheatData data) {
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int attacksPerSecond = data.getAttacksPerSecond();
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if (attacksPerSecond > 15) {
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addAlert(data.getPlayerName(), "KillAura", "APS: " + attacksPerSecond, 0.7);
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}
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}
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private void checkInventoryHack(String playerName, PlayerCheatData data) {
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for (String item : SUSPICIOUS_COMPOUNDS) {
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if (data.hasItem(item)) {
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addAlert(playerName, "InventoryHack", "Suspicious item: " + item, 0.5);
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}
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}
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}
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private void checkScaffold(String playerName, PlayerCheatData data) {
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int blocksPerSecond = data.getBlocksPerSecond();
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if (blocksPerSecond > 20) {
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addAlert(playerName, "Scaffold", "Blocks/sec: " + blocksPerSecond, 0.6);
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}
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}
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private void addAlert(String playerName, String cheatType, String details, double confidence) {
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CheatAlert alert = new CheatAlert(playerName, cheatType, details, confidence);
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alerts.add(alert);
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logger.warn("作弊检测 [{}]: 玩家: {}, 详情: {}, 置信度: {:.0f}%",
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cheatType, playerName, details, confidence * 100);
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while (alerts.size() > 500) {
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alerts.remove(0);
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}
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}
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public List<CheatAlert> getAlerts() {
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return new ArrayList<>(alerts);
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}
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public List<CheatAlert> getAlerts(String playerName) {
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return alerts.stream()
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.filter(a -> a.getPlayerName().equals(playerName))
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.toList();
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}
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public PlayerCheatData getPlayerData(String playerName) {
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return playerData.get(playerName);
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}
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public static class PlayerCheatData {
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private final String playerName;
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private final List<PositionRecord> positions = new ArrayList<>();
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private final List<AttackRecord> attacks = new ArrayList<>();
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private final List<String> inventory = new ArrayList<>(36);
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private int blockPlacements = 0;
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public PlayerCheatData(String playerName) {
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this.playerName = playerName;
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}
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public void recordPosition(double x, double y, double z, boolean onGround) {
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positions.add(new PositionRecord(x, y, z, onGround));
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while (positions.size() > 100) {
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positions.remove(0);
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}
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}
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public void recordAttack(String target, double damage) {
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attacks.add(new AttackRecord(target, damage));
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while (attacks.size() > 50) {
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attacks.remove(0);
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}
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}
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public void recordInventoryChange(String item, int slot) {
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if (inventory.size() <= slot) {
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while (inventory.size() <= slot) {
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inventory.add(null);
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}
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}
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inventory.set(slot, item);
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}
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public void recordBlockPlace(String blockType, int x, int y, int z) {
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blockPlacements++;
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}
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public double getMovementSpeed() {
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if (positions.size() < 2) return 0;
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PositionRecord last = positions.get(positions.size() - 1);
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PositionRecord prev = positions.get(positions.size() - 2);
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double dx = last.x - prev.x;
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double dz = last.z - prev.z;
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return Math.sqrt(dx * dx + dz * dz);
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}
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public double getVerticalSpeed() {
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if (positions.size() < 2) return 0;
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PositionRecord last = positions.get(positions.size() - 1);
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PositionRecord prev = positions.get(positions.size() - 2);
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return Math.abs(last.y - prev.y);
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}
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public boolean isFlying() {
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return positions.stream()
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.anyMatch(p -> p.y > 0.1);
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}
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public boolean hasBlockBelow() {
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return positions.stream()
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.anyMatch(p -> !p.onGround);
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}
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public double getAttackReach() {
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return 3.0 + Math.random() * 0.5;
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}
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public int getAttacksPerSecond() {
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return attacks.size();
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}
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public int getBlocksPerSecond() {
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return blockPlacements;
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}
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public boolean hasItem(String item) {
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return inventory.stream()
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.anyMatch(i -> i != null && i.contains(item));
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}
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public String getPlayerName() { return playerName; }
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}
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public static class PositionRecord {
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private final double x, y, z;
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private final boolean onGround;
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private final long timestamp;
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public PositionRecord(double x, double y, double z, boolean onGround) {
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this.x = x;
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this.y = y;
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this.z = z;
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this.onGround = onGround;
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this.timestamp = System.currentTimeMillis();
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}
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public double getX() { return x; }
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public double getY() { return y; }
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public double getZ() { return z; }
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public boolean isOnGround() { return onGround; }
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public long getTimestamp() { return timestamp; }
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}
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public static class AttackRecord {
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private final String target;
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private final double damage;
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private final long timestamp;
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public AttackRecord(String target, double damage) {
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this.target = target;
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this.damage = damage;
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this.timestamp = System.currentTimeMillis();
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}
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public String getTarget() { return target; }
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public double getDamage() { return damage; }
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public long getTimestamp() { return timestamp; }
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}
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public static class CheatAlert {
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private final String playerName;
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private final String cheatType;
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private final String details;
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private final double confidence;
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private final LocalDateTime timestamp;
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public CheatAlert(String playerName, String cheatType, String details, double confidence) {
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this.playerName = playerName;
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this.cheatType = cheatType;
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this.details = details;
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this.confidence = confidence;
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this.timestamp = LocalDateTime.now();
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}
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public String getPlayerName() { return playerName; }
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public String getCheatType() { return cheatType; }
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public String getDetails() { return details; }
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public double getConfidence() { return confidence; }
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public LocalDateTime getTimestamp() { return timestamp; }
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}
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}
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