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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 dual | ||
| 30 | * IPv4/IPv6 stack. | ||
| 31 | * <p> | ||
| 32 | * If InetAddress.preferIPv6Address is true then anyLocalAddress(), | ||
| 33 | * loopbackAddress(), and localHost() will return IPv6 addresses, | ||
| 34 | * otherwise IPv4 addresses. | ||
| 35 | * | ||
| 36 | * @since 1.4 | ||
| 37 | */ | ||
| 38 | |||
| 39 | class Inet6AddressImpl implements InetAddressImpl { | ||
| 40 | public native String getLocalHostName() throws UnknownHostException; | ||
| 41 | public native InetAddress[] | ||
| 42 | lookupAllHostAddr(String hostname) throws UnknownHostException; | ||
| 43 | public native String getHostByAddr(byte[] addr) throws UnknownHostException; | ||
| 44 | private native boolean isReachable0(byte[] addr, int scope, int timeout, byte[] inf, int ttl, int if_scope) throws IOException; | ||
| 45 | |||
| 46 | public boolean isReachable(InetAddress addr, int timeout, NetworkInterface netif, int ttl) throws IOException { | ||
| 47 | byte[] ifaddr = null; | ||
| 48 | int scope = -1; | ||
| 49 | int netif_scope = -1; | ||
| 50 | if (netif != null) { | ||
| 51 | /* | ||
| 52 | * Let's make sure we bind to an address of the proper family. | ||
| 53 | * Which means same family as addr because at this point it could | ||
| 54 | * be either an IPv6 address or an IPv4 address (case of a dual | ||
| 55 | * stack system). | ||
| 56 | */ | ||
| 57 | java.util.Enumeration it = netif.getInetAddresses(); | ||
| 58 | InetAddress inetaddr = null; | ||
| 59 | while (it.hasMoreElements()) { | ||
| 60 | inetaddr = (InetAddress) it.nextElement(); | ||
| 61 | if (inetaddr.getClass().isInstance(addr)) { | ||
| 62 | ifaddr = inetaddr.getAddress(); | ||
| 63 | if (inetaddr instanceof Inet6Address) { | ||
| 64 | netif_scope = ((Inet6Address) inetaddr).getScopeId(); | ||
| 65 | } | ||
| 66 | break; | ||
| 67 | } | ||
| 68 | } | ||
| 69 | if (ifaddr == null) { | ||
| 70 | // Interface doesn't support the address family of | ||
| 71 | // the destination | ||
| 72 | return false; | ||
| 73 | } | ||
| 74 | } | ||
| 75 | if (addr instanceof Inet6Address) | ||
| 76 | scope = ((Inet6Address) addr).getScopeId(); | ||
| 77 | return isReachable0(addr.getAddress(), scope, timeout, ifaddr, ttl, netif_scope); | ||
| 78 | } | ||
| 79 | |||
| 80 | public synchronized InetAddress anyLocalAddress() { | ||
| 81 | if (anyLocalAddress == null) { | ||
| 82 | if (InetAddress.preferIPv6Address) { | ||
| 83 | anyLocalAddress = new Inet6Address(); | ||
| 84 | anyLocalAddress.hostName = "::"; | ||
| 85 | } else { | ||
| 86 | anyLocalAddress = (new Inet4AddressImpl()).anyLocalAddress(); | ||
| 87 | } | ||
| 88 | } | ||
| 89 | return anyLocalAddress; | ||
| 90 | } | ||
| 91 | |||
| 92 | public synchronized InetAddress loopbackAddress() { | ||
| 93 | if (loopbackAddress == null) { | ||
| 94 | if (InetAddress.preferIPv6Address) { | ||
| 95 | byte[] loopback = | ||
| 96 | {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | ||
| 97 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}; | ||
| 98 | loopbackAddress = new Inet6Address("localhost", loopback); | ||
| 99 | } else { | ||
| 100 | loopbackAddress = (new Inet4AddressImpl()).loopbackAddress(); | ||
| 101 | } | ||
| 102 | } | ||
| 103 | return loopbackAddress; | ||
| 104 | } | ||
| 105 | |||
| 106 | private InetAddress anyLocalAddress; | ||
| 107 | private InetAddress loopbackAddress; | ||
| 108 | } | ||