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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 | } | ||