io.shardingsphere.jdbc.orchestration.internal.util.IpUtils Maven / Gradle / Ivy
/*
* Copyright 2016-2018 shardingsphere.io.
*
* 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 io.shardingsphere.jdbc.orchestration.internal.util;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;
/**
* 获取真实本机网络的服务.
*
* @author caohao
*/
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public final class IpUtils {
private static volatile String cachedIpAddress;
/**
* 获取本机IP地址.
*
*
* 有限获取外网IP地址.
* 也有可能是链接着路由器的最终IP地址.
* 如果发生异常返回UnknownIP.
*
*
* @return 本机IP地址
*/
public static String getIp() {
if (null != cachedIpAddress) {
return cachedIpAddress;
}
Enumeration netInterfaces;
try {
netInterfaces = NetworkInterface.getNetworkInterfaces();
} catch (final SocketException ex) {
return "UnknownIP";
}
String localIpAddress = null;
while (netInterfaces.hasMoreElements()) {
NetworkInterface netInterface = netInterfaces.nextElement();
Enumeration ipAddresses = netInterface.getInetAddresses();
while (ipAddresses.hasMoreElements()) {
InetAddress ipAddress = ipAddresses.nextElement();
if (isPublicIpAddress(ipAddress)) {
String publicIpAddress = ipAddress.getHostAddress();
cachedIpAddress = publicIpAddress;
return publicIpAddress;
}
if (isLocalIpAddress(ipAddress)) {
localIpAddress = ipAddress.getHostAddress();
}
}
}
cachedIpAddress = localIpAddress;
return localIpAddress;
}
private static boolean isPublicIpAddress(final InetAddress ipAddress) {
return !ipAddress.isSiteLocalAddress() && !ipAddress.isLoopbackAddress() && !isV6IpAddress(ipAddress);
}
private static boolean isLocalIpAddress(final InetAddress ipAddress) {
return ipAddress.isSiteLocalAddress() && !ipAddress.isLoopbackAddress() && !isV6IpAddress(ipAddress);
}
private static boolean isV6IpAddress(final InetAddress ipAddress) {
return ipAddress.getHostAddress().contains(":");
}
}