com.github.shepherdviolet.glacimon.java.net.NetworkUtils Maven / Gradle / Ivy
/*
* Copyright (C) 2022-2022 S.Violet
*
* 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.
*
* Project GitHub: https://github.com/shepherdviolet/glacimon
* Email: [email protected]
*/
package com.github.shepherdviolet.glacimon.java.net;
import com.github.shepherdviolet.glacimon.java.misc.CheckUtils;
import java.io.IOException;
import java.net.*;
import java.util.*;
/**
* 网络工具
*
* @author shepherdviolet
*/
public class NetworkUtils {
/**
* 模拟TELNET
* @param hostname IP或域名, 例如: 61.135.169.125或www.baidu.com
* @param port 端口
* @param timeout 探测超时ms
* @return true:成功 false:失败
*/
public static boolean telnet(String hostname, int port, int timeout) {
Socket socket = null;
try {
socket = new Socket();
InetSocketAddress address = new InetSocketAddress(hostname, port);
socket.connect(address, timeout);
return true;
} catch (Throwable ignore) {
return false;
} finally {
if (socket != null) {
try {
socket.close();
} catch (IOException ignored) {
}
}
}
}
/**
* 获取第一个本地IP
*
* @return 第一个本地IP
* @throws SocketException 异常
*/
public static InetAddress getFirstLocalIp() throws SocketException {
return getFirstLocalIp(null);
}
/**
* 获取第一个本地IP
*
* @param localIpFilter IP过滤规则
* @return 第一个本地IP
* @throws SocketException 异常
*/
public static InetAddress getFirstLocalIp(LocalIpFilter localIpFilter) throws SocketException {
if (localIpFilter == null) {
localIpFilter = DEFAULT_LOCAL_IP_FILTER;
}
Enumeration networkInterfaces = NetworkInterface.getNetworkInterfaces();
if (networkInterfaces == null) {
return null;
}
while (networkInterfaces.hasMoreElements()) {
NetworkInterface networkInterface = networkInterfaces.nextElement();
Enumeration addresses = networkInterface.getInetAddresses();
while (addresses.hasMoreElements()) {
InetAddress address = addresses.nextElement();
if (localIpFilter.filter(networkInterface, address)) {
return address;
}
}
}
return null;
}
/**
* 获取本地设备IP
*
* @return 本地IP清单
* @throws SocketException 异常
*/
public static List getLocalIps() throws SocketException {
return getLocalIps(null);
}
/**
* 获取本地设备IP
*
* @param localIpFilter IP过滤规则
* @return 本地IP清单
* @throws SocketException 异常
*/
public static List getLocalIps(LocalIpFilter localIpFilter) throws SocketException {
if (localIpFilter == null) {
localIpFilter = DEFAULT_LOCAL_IP_FILTER;
}
List list = new ArrayList<>();
Enumeration networkInterfaces = NetworkInterface.getNetworkInterfaces();
if (networkInterfaces == null) {
return list;
}
while (networkInterfaces.hasMoreElements()) {
NetworkInterface networkInterface = networkInterfaces.nextElement();
Enumeration addresses = networkInterface.getInetAddresses();
while (addresses.hasMoreElements()) {
InetAddress address = addresses.nextElement();
if (localIpFilter.filter(networkInterface, address)) {
list.add(address);
}
}
}
return list;
}
private static final LocalIpFilter DEFAULT_LOCAL_IP_FILTER = new DefaultLocalIpFilter();
/**
* 默认本地IP过滤规则
*/
private static class DefaultLocalIpFilter implements LocalIpFilter {
private static final String IGNORED_INTERFACE = "glacimon.networkutils.ignored.interface";
private static final String IGNORED_ADDRESS = "glacimon.networkutils.ignored.address";
private static final String IGNORED_ADDRESS_PREFIX = "glacimon.networkutils.ignored.address.prefix";
private static final Set IGNORED_INTERFACE_SET = getPropertySet(IGNORED_INTERFACE);
private static final Set IGNORED_ADDRESS_SET = getPropertySet(IGNORED_ADDRESS);
private static final Set IGNORED_ADDRESS_PREFIX_SET = getPropertySet(IGNORED_ADDRESS_PREFIX);
@Override
public boolean filter(NetworkInterface networkInterface, InetAddress inetAddress) throws SocketException {
if (!networkInterface.isUp() || // 网卡禁用
networkInterface.isLoopback() || // 环回地址
networkInterface.isVirtual() || // 虚拟网卡
inetAddress == null || // 地址为空
inetAddress.isLoopbackAddress()){ // 环回地址
return false;
}
// 局域网地址(169.254.0.0/16), 且不是点到点网络(例如拨号器)
if (inetAddress.isLinkLocalAddress() && !networkInterface.isPointToPoint()) {
return false;
}
// 根据网卡名忽略(lo eth0 wlan0 ...)
if (IGNORED_INTERFACE_SET != null && IGNORED_INTERFACE_SET.contains(networkInterface.getName())) {
return false;
}
String hostAddress = inetAddress.getHostAddress();
// 根据IP地址忽略
if (IGNORED_ADDRESS_SET != null && IGNORED_ADDRESS_SET.contains(hostAddress)) {
return false;
}
// 根据IP地址前缀忽略
if (IGNORED_ADDRESS_PREFIX_SET != null) {
for (String ignoredPrefix : IGNORED_ADDRESS_PREFIX_SET) {
if (hostAddress.startsWith(ignoredPrefix)) {
return false;
}
}
}
return true;
}
private static Set getPropertySet(String propertyKey) {
Set set = null;
String propertyValue = System.getProperty(propertyKey);
if (CheckUtils.notEmptyNotBlank(propertyValue)) {
for (String subValue : propertyValue.split(",")) {
if (set == null) {
set = new HashSet<>();
}
set.add(subValue.trim());
}
}
return set;
}
};
/**
* 本地IP过滤规则
*/
public interface LocalIpFilter {
boolean filter(NetworkInterface networkInterface, InetAddress inetAddress) throws SocketException;
}
}