sviolet.thistle.util.net.NetworkUtils Maven / Gradle / Ivy
/*
* Copyright (C) 2015-2018 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/thistle
* Email: [email protected]
*/
package sviolet.thistle.util.net;
import java.io.IOException;
import java.net.*;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
/**
* 网络工具
*
* @author S.Violet
*/
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 LocalIpFilter() {
@Override
public boolean filter(NetworkInterface networkInterface, InetAddress inetAddress) throws SocketException {
return inetAddress != null && !inetAddress.isLoopbackAddress() && (networkInterface.isPointToPoint() || !inetAddress.isLinkLocalAddress());
}
};
/**
* 本地IP过滤规则
*/
public interface LocalIpFilter {
boolean filter(NetworkInterface networkInterface, InetAddress inetAddress) throws SocketException;
}
//获取本机IP精简版
// private String getFirstLocalIp() throws SocketException {
// 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 (address != null && !address.isLoopbackAddress() && (networkInterface.isPointToPoint() || !address.isLinkLocalAddress())) {
// return address.getHostAddress();
// }
// }
// }
// return null;
// }
}