01: /*
02: * @(#)Inet4AddressImpl.java 1.5 06/10/10
03: *
04: * Copyright 1990-2006 Sun Microsystems, Inc. All Rights Reserved.
05: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License version
09: * 2 only, as published by the Free Software Foundation.
10: *
11: * This program is distributed in the hope that it will be useful, but
12: * WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * General Public License version 2 for more details (a copy is
15: * included at /legal/license.txt).
16: *
17: * You should have received a copy of the GNU General Public License
18: * version 2 along with this work; if not, write to the Free Software
19: * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20: * 02110-1301 USA
21: *
22: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
23: * Clara, CA 95054 or visit www.sun.com if you need additional
24: * information or have any questions.
25: */
26: package java.net;
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:
36: public native byte[][] lookupAllHostAddr(String hostname)
37: throws UnknownHostException;
38:
39: public native String getHostByAddr(byte[] addr)
40: throws UnknownHostException;
41:
42: public synchronized InetAddress anyLocalAddress() {
43: if (anyLocalAddress == null) {
44: anyLocalAddress = new Inet4Address(); // {0x00,0x00,0x00,0x00}
45: anyLocalAddress.hostName = "0.0.0.0";
46: }
47: return anyLocalAddress;
48: }
49:
50: public synchronized InetAddress loopbackAddress() {
51: if (loopbackAddress == null) {
52: byte[] loopback = { 0x7f, 0x00, 0x00, 0x01 };
53: loopbackAddress = new Inet4Address("localhost", loopback);
54: }
55: return loopbackAddress;
56: }
57:
58: private InetAddress anyLocalAddress;
59: private InetAddress loopbackAddress;
60: }
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