package com.xxl.rpc.core.util; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.IOException; import java.net.Inet6Address; import java.net.InetAddress; import java.net.NetworkInterface; import java.net.UnknownHostException; import java.util.Enumeration; import java.util.regex.Pattern; /** * ip tool * * @author xuxueli 2016-5-22 11:38:05 */ public class IpUtil { private static final Logger logger = LoggerFactory.getLogger(IpUtil.class); private static final String ANYHOST_VALUE = "0.0.0.0"; private static final String LOCALHOST_VALUE = "127.0.0.1"; private static final Pattern IP_PATTERN = Pattern.compile("\\d{1,3}(\\.\\d{1,3}){3,5}$"); private static volatile InetAddress LOCAL_ADDRESS = null; // ---------------------- valid ---------------------- private static InetAddress toValidAddress(InetAddress address) { if (address instanceof Inet6Address) { Inet6Address v6Address = (Inet6Address) address; if (isPreferIPV6Address()) { return normalizeV6Address(v6Address); } } if (isValidV4Address(address)) { return address; } return null; } private static boolean isPreferIPV6Address() { return Boolean.getBoolean("java.net.preferIPv6Addresses"); } /** * valid Inet4Address * * @param address * @return */ private static boolean isValidV4Address(InetAddress address) { if (address == null || address.isLoopbackAddress()) { return false; } String name = address.getHostAddress(); boolean result = (name != null && IP_PATTERN.matcher(name).matches() && !ANYHOST_VALUE.equals(name) && !LOCALHOST_VALUE.equals(name)); return result; } /** * normalize the ipv6 Address, convert scope name to scope id. * e.g. * convert * fe80:0:0:0:894:aeec:f37d:23e1%en0 * to * fe80:0:0:0:894:aeec:f37d:23e1%5 * <p> * The %5 after ipv6 address is called scope id. * see java doc of {@link Inet6Address} for more details. * * @param address the input address * @return the normalized address, with scope id converted to int */ private static InetAddress normalizeV6Address(Inet6Address address) { String addr = address.getHostAddress(); int i = addr.lastIndexOf('%'); if (i > 0) { try { return InetAddress.getByName(addr.substring(0, i) + '%' + address.getScopeId()); } catch (UnknownHostException e) { // ignore logger.debug("Unknown IPV6 address: ", e); } } return address; } // ---------------------- find ip ---------------------- private static InetAddress getLocalAddress0() { InetAddress localAddress = null; try { localAddress = InetAddress.getLocalHost(); InetAddress addressItem = toValidAddress(localAddress); if (addressItem != null) { return addressItem; } } catch (Throwable e) { logger.error(e.getMessage(), e); } try { Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces(); if (null == interfaces) { return localAddress; } while (interfaces.hasMoreElements()) { try { NetworkInterface network = interfaces.nextElement(); if (network.isLoopback() || network.isVirtual() || !network.isUp()) { continue; } Enumeration<InetAddress> addresses = network.getInetAddresses(); while (addresses.hasMoreElements()) { try { InetAddress addressItem = toValidAddress(addresses.nextElement()); if (addressItem != null) { try { if(addressItem.isReachable(100)){ return addressItem; } } catch (IOException e) { // ignore } } } catch (Throwable e) { logger.error(e.getMessage(), e); } } } catch (Throwable e) { logger.error(e.getMessage(), e); } } } catch (Throwable e) { logger.error(e.getMessage(), e); } return localAddress; } // ---------------------- tool ---------------------- /** * Find first valid IP from local network card * * @return first valid local IP */ public static InetAddress getLocalAddress() { if (LOCAL_ADDRESS != null) { return LOCAL_ADDRESS; } InetAddress localAddress = getLocalAddress0(); LOCAL_ADDRESS = localAddress; return localAddress; } /** * get ip address * * @return String */ public static String getIp(){ return getLocalAddress().getHostAddress(); } /** * get ip:port * * @param port * @return String */ public static String getIpPort(int port){ String ip = getIp(); return getIpPort(ip, port); } public static String getIpPort(String ip, int port){ if (ip==null) { return null; } return ip.concat(":").concat(String.valueOf(port)); } public static Object[] parseIpPort(String address){ String[] array = address.split(":"); String host = array[0]; int port = Integer.parseInt(array[1]); return new Object[]{host, port}; } }