Showing the changes to java/pkg/java/net/Inet4AddressImpl.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 2002, 2005, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | +package java.net; | |
| 26 | +import java.io.IOException; | |
| 27 | + | |
| 28 | +/* | |
| 29 | + * Package private implementation of InetAddressImpl for IPv4. | |
| 30 | + * | |
| 31 | + * @since 1.4 | |
| 32 | + */ | |
| 33 | +class Inet4AddressImpl implements InetAddressImpl { | |
| 34 | + public native String getLocalHostName() throws UnknownHostException; | |
| 35 | + public native InetAddress[] | |
| 36 | + lookupAllHostAddr(String hostname) throws UnknownHostException; | |
| 37 | + public native String getHostByAddr(byte[] addr) throws UnknownHostException; | |
| 38 | + private native boolean isReachable0(byte[] addr, int timeout, byte[] ifaddr, int ttl) throws IOException; | |
| 39 | + | |
| 40 | + public synchronized InetAddress anyLocalAddress() { | |
| 41 | + if (anyLocalAddress == null) { | |
| 42 | + anyLocalAddress = new Inet4Address(); // {0x00,0x00,0x00,0x00} | |
| 43 | + anyLocalAddress.hostName = "0.0.0.0"; | |
| 44 | + } | |
| 45 | + return anyLocalAddress; | |
| 46 | + } | |
| 47 | + | |
| 48 | + public synchronized InetAddress loopbackAddress() { | |
| 49 | + if (loopbackAddress == null) { | |
| 50 | + byte[] loopback = {0x7f,0x00,0x00,0x01}; | |
| 51 | + loopbackAddress = new Inet4Address("localhost", loopback); | |
| 52 | + } | |
| 53 | + return loopbackAddress; | |
| 54 | + } | |
| 55 | + | |
| 56 | + public boolean isReachable(InetAddress addr, int timeout, NetworkInterface netif, int ttl) throws IOException { | |
| 57 | + byte[] ifaddr = null; | |
| 58 | + if (netif != null) { | |
| 59 | + /* | |
| 60 | + * Let's make sure we use an address of the proper family | |
| 61 | + */ | |
| 62 | + java.util.Enumeration it = netif.getInetAddresses(); | |
| 63 | + InetAddress inetaddr = null; | |
| 64 | + while (!(inetaddr instanceof Inet4Address) && | |
| 65 | + it.hasMoreElements()) | |
| 66 | + inetaddr = (InetAddress) it.nextElement(); | |
| 67 | + if (inetaddr instanceof Inet4Address) | |
| 68 | + ifaddr = inetaddr.getAddress(); | |
| 69 | + } | |
| 70 | + return isReachable0(addr.getAddress(), timeout, ifaddr, ttl); | |
| 71 | + } | |
| 72 | + private InetAddress anyLocalAddress; | |
| 73 | + private InetAddress loopbackAddress; | |
| 74 | +} | |