IpUtil.java
/*
* Copyright 2024-2030 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.sandy.ecp.framework.util;
import java.net.InetAddress;
import java.net.UnknownHostException;
import org.apache.commons.lang3.StringUtils;
/**
* Description:
*
* @author Sandy
* @Date 2024年4月3日 下午3:33:19
* @since 1.0.0
*/
public class IpUtil {
public final static String REGX_0_255 = "(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9]\\d|\\d)";
// 匹配 ip
public final static String REGX_IP = "((" + REGX_0_255 + "\\.){3}" + REGX_0_255 + ")";
public final static String REGX_IP_WILDCARD = "(((\\*\\.){3}\\*)|(" + REGX_0_255 + "(\\.\\*){3})|(" + REGX_0_255
+ "\\." + REGX_0_255 + ")(\\.\\*){2}" + "|((" + REGX_0_255 + "\\.){3}\\*))";
// 匹配网段
public final static String REGX_IP_SEG = "(" + REGX_IP + "\\-" + REGX_IP + ")";
/**
* 检查是否为内部IP地址
*
* @param ip
* IP地址
* @return 结果
*/
public static boolean internalIp(String ip) {
byte[] addr = textToNumericFormatV4(ip);
return internalIp(addr) || "127.0.0.1".equals(ip);
}
/**
* 检查是否为内部IP地址
*
* @param addr
* byte地址
* @return 结果
*/
private static boolean internalIp(byte[] addr) {
if (StringUtil.isNull(addr) || addr.length < 2) {
return true;
}
final byte b0 = addr[0];
final byte b1 = addr[1];
// 10.x.x.x/8
final byte SECTION_1 = 0x0A;
// 172.16.x.x/12
final byte SECTION_2 = (byte) 0xAC;
final byte SECTION_3 = (byte) 0x10;
final byte SECTION_4 = (byte) 0x1F;
// 192.168.x.x/16
final byte SECTION_5 = (byte) 0xC0;
final byte SECTION_6 = (byte) 0xA8;
switch (b0) {
case SECTION_1:
return true;
case SECTION_2:
if (b1 >= SECTION_3 && b1 <= SECTION_4) {
return true;
}
case SECTION_5:
switch (b1) {
case SECTION_6:
return true;
}
default:
return false;
}
}
/**
* 将IPv4地址转换成字节
*
* @param text
* IPv4地址
* @return byte 字节
*/
public static byte[] textToNumericFormatV4(String text) {
if (text.length() == 0) {
return null;
}
byte[] bytes = new byte[4];
String[] elements = text.split("\\.", -1);
try {
long l;
int i;
switch (elements.length) {
case 1:
l = Long.parseLong(elements[0]);
if ((l < 0L) || (l > 4294967295L)) {
return null;
}
bytes[0] = (byte) (int) (l >> 24 & 0xFF);
bytes[1] = (byte) (int) ((l & 0xFFFFFF) >> 16 & 0xFF);
bytes[2] = (byte) (int) ((l & 0xFFFF) >> 8 & 0xFF);
bytes[3] = (byte) (int) (l & 0xFF);
break;
case 2:
l = Integer.parseInt(elements[0]);
if ((l < 0L) || (l > 255L)) {
return null;
}
bytes[0] = (byte) (int) (l & 0xFF);
l = Integer.parseInt(elements[1]);
if ((l < 0L) || (l > 16777215L)) {
return null;
}
bytes[1] = (byte) (int) (l >> 16 & 0xFF);
bytes[2] = (byte) (int) ((l & 0xFFFF) >> 8 & 0xFF);
bytes[3] = (byte) (int) (l & 0xFF);
break;
case 3:
for (i = 0; i < 2; ++i) {
l = Integer.parseInt(elements[i]);
if ((l < 0L) || (l > 255L)) {
return null;
}
bytes[i] = (byte) (int) (l & 0xFF);
}
l = Integer.parseInt(elements[2]);
if ((l < 0L) || (l > 65535L)) {
return null;
}
bytes[2] = (byte) (int) (l >> 8 & 0xFF);
bytes[3] = (byte) (int) (l & 0xFF);
break;
case 4:
for (i = 0; i < 4; ++i) {
l = Integer.parseInt(elements[i]);
if ((l < 0L) || (l > 255L)) {
return null;
}
bytes[i] = (byte) (int) (l & 0xFF);
}
break;
default:
return null;
}
} catch (NumberFormatException e) {
return null;
}
return bytes;
}
/**
* 获取IP地址
*
* @return 本地IP地址
*/
public static String getHostIp() {
try {
return InetAddress.getLocalHost().getHostAddress();
} catch (UnknownHostException e) {
}
return "127.0.0.1";
}
/**
* 获取主机名
*
* @return 本地主机名
*/
public static String getHostName() {
try {
return InetAddress.getLocalHost().getHostName();
} catch (UnknownHostException e) {
}
return "未知";
}
/**
* 从多级反向代理中获得第一个非unknown IP地址
*
* @param ip
* 获得的IP地址
* @return 第一个非unknown IP地址
*/
public static String getMultistageReverseProxyIp(String ip) {
// 多级反向代理检测
if (ip != null && ip.indexOf(",") > 0) {
final String[] ips = ip.trim().split(",");
for (String subIp : ips) {
if (false == isUnknown(subIp)) {
ip = subIp;
break;
}
}
}
return StringUtils.substring(ip, 0, 255);
}
/**
* 检测给定字符串是否为未知，多用于检测HTTP请求相关
*
* @param checkString
* 被检测的字符串
* @return 是否未知
*/
public static boolean isUnknown(String checkString) {
return StringUtils.isBlank(checkString) || "unknown".equalsIgnoreCase(checkString);
}
/**
* 是否为IP
*/
public static boolean isIP(String ip) {
return StringUtils.isNotBlank(ip) && ip.matches(REGX_IP);
}
/**
* 是否为IP，或 *为间隔的通配符地址
*/
public static boolean isIpWildCard(String ip) {
return StringUtils.isNotBlank(ip) && ip.matches(REGX_IP_WILDCARD);
}
/**
* 检测参数是否在ip通配符里
*/
public static boolean ipIsInWildCardNoCheck(String ipWildCard, String ip) {
String[] s1 = ipWildCard.split("\\.");
String[] s2 = ip.split("\\.");
boolean isMatchedSeg = true;
for (int i = 0; i < s1.length && !s1[i].equals("*"); i++) {
if (!s1[i].equals(s2[i])) {
isMatchedSeg = false;
break;
}
}
return isMatchedSeg;
}
/**
* 是否为特定格式如:“10.10.10.1-10.10.10.99”的ip段字符串
*/
public static boolean isIPSegment(String ipSeg) {
return StringUtils.isNotBlank(ipSeg) && ipSeg.matches(REGX_IP_SEG);
}
/**
* 判断ip是否在指定网段中
*/
public static boolean ipIsInNetNoCheck(String iparea, String ip) {
int idx = iparea.indexOf('-');
String[] sips = iparea.substring(0, idx).split("\\.");
String[] sipe = iparea.substring(idx + 1).split("\\.");
String[] sipt = ip.split("\\.");
long ips = 0L, ipe = 0L, ipt = 0L;
for (int i = 0; i < 4; ++i) {
ips = ips << 8 | Integer.parseInt(sips[i]);
ipe = ipe << 8 | Integer.parseInt(sipe[i]);
ipt = ipt << 8 | Integer.parseInt(sipt[i]);
}
if (ips > ipe) {
long t = ips;
ips = ipe;
ipe = t;
}
return ips <= ipt && ipt <= ipe;
}
/**
* 校验ip是否符合过滤串规则
*
* @param filter
* 过滤IP列表,支持后缀'*'通配,支持网段如:`10.10.10.1-10.10.10.99`
* @param ip
* 校验IP地址
* @return boolean 结果
*/
public static boolean isMatchedIp(String filter, String ip) {
if (StringUtils.isEmpty(filter) || StringUtils.isEmpty(ip)) {
return false;
}
String[] ips = filter.split(";");
for (String iStr : ips) {
if (isIP(iStr) && iStr.equals(ip)) {
return true;
} else if (isIpWildCard(iStr) && ipIsInWildCardNoCheck(iStr, ip)) {
return true;
} else if (isIPSegment(iStr) && ipIsInNetNoCheck(iStr, ip)) {
return true;
}
}
return false;
}
}