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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 | +} | |