| J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2002-2005 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any 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 | } |