182 lines
7.6 KiB
Java
182 lines
7.6 KiB
Java
package com.zdjizhi.etl;
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import com.zdjizhi.common.CommonConfig;
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import com.zdjizhi.common.DosEventLog;
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import com.zdjizhi.common.DosSketchLog;
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import com.zdjizhi.utils.HbaseUtils;
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import com.zdjizhi.utils.IpUtils;
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import com.zdjizhi.utils.SnowflakeId;
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import org.apache.commons.lang.StringUtils;
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import org.apache.flink.api.common.functions.RichMapFunction;
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import org.apache.flink.api.java.tuple.Tuple2;
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import org.apache.flink.configuration.Configuration;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.text.NumberFormat;
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import java.text.ParseException;
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import java.util.*;
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/**
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* @author wlh
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*/
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public class DosDetection extends RichMapFunction<DosSketchLog, DosEventLog> {
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private static final Logger logger = LoggerFactory.getLogger(DosDetection.class);
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private static Map<String, Map<String, Tuple2<ArrayList<Integer>, Integer>>> baselineMap;
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private final static int BASELINE_SIZE = 144;
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private final static NumberFormat PERCENT_INSTANCE = NumberFormat.getPercentInstance();
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@Override
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public void open(Configuration parameters) {
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baselineMap = HbaseUtils.baselineMap;
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PERCENT_INSTANCE.setMinimumFractionDigits(2);
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}
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@Override
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public DosEventLog map(DosSketchLog value) {
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try {
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String destinationIp = value.getDestination_ip();
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String attackType = value.getAttack_type();
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logger.debug("当前判断IP：{}, 类型: {}", destinationIp, attackType);
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if (baselineMap.containsKey(destinationIp)) {
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Tuple2<ArrayList<Integer>, Integer> floodTypeTup = baselineMap.get(destinationIp).get(attackType);
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Integer base = getBaseValue(floodTypeTup, value);
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long diff = value.getSketch_sessions() - base;
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if (diff > 0 && base != 0) {
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String percent = getDiffPercent(diff, base);
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double diffPercentDouble = getDiffPercentDouble(percent);
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Severity severity = judgeSeverity(diffPercentDouble);
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if (severity != Severity.NORMAL) {
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DosEventLog result = getResult(value, severity, percent);
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logger.info("检测到当前server IP {} 存在 {} 异常,日志详情\n {}", destinationIp, attackType, result.toString());
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return result;
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} else {
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logger.debug("当前server IP：{} 未出现 {} 异常,日志详情 {}", destinationIp, attackType, value.toString());
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}
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}
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} else {
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logger.debug("未获取到当前server IP：{} 类型 {} baseline数据", destinationIp, attackType);
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}
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} catch (Exception e) {
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logger.error("判定失败\n {} \n{}", value, e);
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}
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return null;
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}
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private DosEventLog getResult(DosSketchLog value, Severity severity, String percent) {
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DosEventLog dosEventLog = new DosEventLog();
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dosEventLog.setLog_id(SnowflakeId.generateId());
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dosEventLog.setStart_time(value.getSketch_start_time());
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dosEventLog.setEnd_time(value.getSketch_start_time() + CommonConfig.FLINK_WINDOW_MAX_TIME);
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dosEventLog.setAttack_type(value.getAttack_type());
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dosEventLog.setSeverity(severity.toString());
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dosEventLog.setConditions(getConditions(percent));
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dosEventLog.setDestination_ip(value.getDestination_ip());
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dosEventLog.setDestination_country(IpUtils.ipLookup.countryLookup(value.getDestination_ip()));
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String ipList = value.getSource_ip();
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dosEventLog.setSource_ip_list(ipList);
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dosEventLog.setSource_country_list(getSourceCountryList(ipList));
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dosEventLog.setSession_rate(value.getSketch_sessions());
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dosEventLog.setPacket_rate(value.getSketch_packets());
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dosEventLog.setBit_rate(value.getSketch_bytes());
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return dosEventLog;
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}
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private Integer getBaseValue(Tuple2<ArrayList<Integer>, Integer> floodTypeTup, DosSketchLog value) {
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Integer base = 0;
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try {
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if (floodTypeTup != null){
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ArrayList<Integer> baselines = floodTypeTup.f0;
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Integer defaultVaule = floodTypeTup.f1;
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if (baselines != null && baselines.size() == BASELINE_SIZE) {
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int timeIndex = getCurrentTimeIndex(value.getSketch_start_time());
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base = baselines.get(timeIndex);
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if (base == 0) {
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logger.debug("获取到当前IP: {},类型: {} baseline值为0,替换为P95观测值{}", value.getDestination_ip(), value.getAttack_type(), defaultVaule);
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base = defaultVaule;
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}
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}
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}
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} catch (Exception e) {
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logger.error("解析baseline数据失败,返回默认值0", e);
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}
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return base;
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}
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private String getConditions(String percent) {
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return "sessions > " + percent + " of baseline";
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}
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private String getSourceCountryList(String sourceIpList) {
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String[] ipArr = sourceIpList.split(",");
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HashSet<String> countrySet = new HashSet<>();
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for (String ip : ipArr) {
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countrySet.add(IpUtils.ipLookup.countryLookup(ip));
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}
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return StringUtils.join(countrySet, ",");
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}
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private int getCurrentTimeIndex(long sketchStartTime) {
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long currentDayTime = sketchStartTime / (60 * 60 * 24) * 60 * 60 * 24;
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long indexLong = (sketchStartTime - currentDayTime) / 600;
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return Integer.parseInt(Long.toString(indexLong));
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}
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private String getDiffPercent(long diff, long base) {
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double diffDou = Double.parseDouble(Long.toString(diff));
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double baseDou = Double.parseDouble(Long.toString(base));
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return PERCENT_INSTANCE.format(diffDou / baseDou);
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}
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public static void main(String[] args) throws Exception {
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System.out.println(new DosDetection().getDiffPercent(219, 0));
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System.out.println(new DosDetection().getDiffPercentDouble("∞%"));
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}
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private double getDiffPercentDouble(String diffPercent) throws ParseException {
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return PERCENT_INSTANCE.parse(diffPercent).doubleValue();
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}
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private Severity judgeSeverity(double diffPercent) {
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if (diffPercent >= CommonConfig.BASELINE_SESSIONS_MINOR_THRESHOLD && diffPercent < CommonConfig.BASELINE_SESSIONS_WARNING_THRESHOLD) {
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return Severity.MINOR;
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} else if (diffPercent >= CommonConfig.BASELINE_SESSIONS_WARNING_THRESHOLD && diffPercent < CommonConfig.BASELINE_SESSIONS_MAJOR_THRESHOLD) {
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return Severity.WARNING;
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} else if (diffPercent >= CommonConfig.BASELINE_SESSIONS_MAJOR_THRESHOLD && diffPercent < CommonConfig.BASELINE_SESSIONS_SEVERE_THRESHOLD) {
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return Severity.MAJOR;
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} else if (diffPercent >= CommonConfig.BASELINE_SESSIONS_SEVERE_THRESHOLD && diffPercent < CommonConfig.BASELINE_SESSIONS_CRITICAL_THRESHOLD) {
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return Severity.SEVERE;
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} else if (diffPercent >= CommonConfig.BASELINE_SESSIONS_CRITICAL_THRESHOLD) {
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return Severity.CRITICAL;
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} else {
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return Severity.NORMAL;
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}
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}
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private enum Severity {
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/**
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* 判断严重程度枚举类型
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*/
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CRITICAL("Critical"),
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SEVERE("Severe"),
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MAJOR("Major"),
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WARNING("Warning"),
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MINOR("Minor"),
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NORMAL("Normal");
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private final String severity;
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@Override
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public String toString() {
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return this.severity;
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}
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Severity(String severity) {
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this.severity = severity;
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}
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}
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}
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