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My first initial commit with all of mine experimental changes.

Dmitry Kabak (userdima committed 13 years ago

Commit d37b88d1 parent 3f5b46618352 files · +2598093 −-8690Browse files

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1+/*
2+ * Copyright (c) 2000, 2006, 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+
26+package java.net;
27+
28+import java.security.AccessController;
29+import java.io.ObjectStreamException;
30+import sun.security.action.*;
31+
32+/**
33+ * This class represents an Internet Protocol version 4 (IPv4) address.
34+ * Defined by <a href="http://www.ietf.org/rfc/rfc790.txt">
35+ * <i>RFC&nbsp;790: Assigned Numbers</i></a>,
36+ * <a href="http://www.ietf.org/rfc/rfc1918.txt">
37+ * <i>RFC&nbsp;1918: Address Allocation for Private Internets</i></a>,
38+ * and <a href="http://www.ietf.org/rfc/rfc2365.txt"><i>RFC&nbsp;2365:
39+ * Administratively Scoped IP Multicast</i></a>
40+ *
41+ * <h4> <A NAME="format">Textual representation of IP addresses</a> </h4>
42+ *
43+ * Textual representation of IPv4 address used as input to methods
44+ * takes one of the following forms:
45+ *
46+ * <blockquote><table cellpadding=0 cellspacing=0 summary="layout">
47+ * <tr><td><tt>d.d.d.d</tt></td></tr>
48+ * <tr><td><tt>d.d.d</tt></td></tr>
49+ * <tr><td><tt>d.d</tt></td></tr>
50+ * <tr><td><tt>d</tt></td></tr>
51+ * </table></blockquote>
52+ *
53+ * <p> When four parts are specified, each is interpreted as a byte of
54+ * data and assigned, from left to right, to the four bytes of an IPv4
55+ * address.
56+
57+ * <p> When a three part address is specified, the last part is
58+ * interpreted as a 16-bit quantity and placed in the right most two
59+ * bytes of the network address. This makes the three part address
60+ * format convenient for specifying Class B net- work addresses as
61+ * 128.net.host.
62+ *
63+ * <p> When a two part address is supplied, the last part is
64+ * interpreted as a 24-bit quantity and placed in the right most three
65+ * bytes of the network address. This makes the two part address
66+ * format convenient for specifying Class A network addresses as
67+ * net.host.
68+ *
69+ * <p> When only one part is given, the value is stored directly in
70+ * the network address without any byte rearrangement.
71+ *
72+ * <p> For methods that return a textual representation as output
73+ * value, the first form, i.e. a dotted-quad string, is used.
74+ *
75+ * <h4> The Scope of a Multicast Address </h4>
76+ *
77+ * Historically the IPv4 TTL field in the IP header has doubled as a
78+ * multicast scope field: a TTL of 0 means node-local, 1 means
79+ * link-local, up through 32 means site-local, up through 64 means
80+ * region-local, up through 128 means continent-local, and up through
81+ * 255 are global. However, the administrative scoping is preferred.
82+ * Please refer to <a href="http://www.ietf.org/rfc/rfc2365.txt">
83+ * <i>RFC&nbsp;2365: Administratively Scoped IP Multicast</i></a>
84+ * @since 1.4
85+ */
86+
87+public final
88+class Inet4Address extends InetAddress {
89+ final static int INADDRSZ = 4;
90+
91+ /** use serialVersionUID from InetAddress, but Inet4Address instance
92+ * is always replaced by an InetAddress instance before being
93+ * serialized */
94+ private static final long serialVersionUID = 3286316764910316507L;
95+
96+ /*
97+ * Perform initializations.
98+ */
99+ static {
100+ init();
101+ }
102+
103+ Inet4Address() {
104+ super();
105+ hostName = null;
106+ address = 0;
107+ family = IPv4;
108+ }
109+
110+ Inet4Address(String hostName, byte addr[]) {
111+ this.hostName = hostName;
112+ this.family = IPv4;
113+ if (addr != null) {
114+ if (addr.length == INADDRSZ) {
115+ address = addr[3] & 0xFF;
116+ address |= ((addr[2] << 8) & 0xFF00);
117+ address |= ((addr[1] << 16) & 0xFF0000);
118+ address |= ((addr[0] << 24) & 0xFF000000);
119+ }
120+ }
121+ }
122+ Inet4Address(String hostName, int address) {
123+ this.hostName = hostName;
124+ this.family = IPv4;
125+ this.address = address;
126+ }
127+
128+ /**
129+ * Replaces the object to be serialized with an InetAddress object.
130+ *
131+ * @return the alternate object to be serialized.
132+ *
133+ * @throws ObjectStreamException if a new object replacing this
134+ * object could not be created
135+ */
136+ private Object writeReplace() throws ObjectStreamException {
137+ // will replace the to be serialized 'this' object
138+ InetAddress inet = new InetAddress();
139+ inet.hostName = this.hostName;
140+ inet.address = this.address;
141+
142+ /**
143+ * Prior to 1.4 an InetAddress was created with a family
144+ * based on the platform AF_INET value (usually 2).
145+ * For compatibility reasons we must therefore write the
146+ * the InetAddress with this family.
147+ */
148+ inet.family = 2;
149+
150+ return inet;
151+ }
152+
153+ /**
154+ * Utility routine to check if the InetAddress is an
155+ * IP multicast address. IP multicast address is a Class D
156+ * address i.e first four bits of the address are 1110.
157+ * @return a <code>boolean</code> indicating if the InetAddress is
158+ * an IP multicast address
159+ * @since JDK1.1
160+ */
161+ public boolean isMulticastAddress() {
162+ return ((address & 0xf0000000) == 0xe0000000);
163+ }
164+
165+ /**
166+ * Utility routine to check if the InetAddress in a wildcard address.
167+ * @return a <code>boolean</code> indicating if the Inetaddress is
168+ * a wildcard address.
169+ * @since 1.4
170+ */
171+ public boolean isAnyLocalAddress() {
172+ return address == 0;
173+ }
174+
175+ /**
176+ * Utility routine to check if the InetAddress is a loopback address.
177+ *
178+ * @return a <code>boolean</code> indicating if the InetAddress is
179+ * a loopback address; or false otherwise.
180+ * @since 1.4
181+ */
182+ private static final int loopback = 2130706433; /* 127.0.0.1 */
183+ public boolean isLoopbackAddress() {
184+ /* 127.x.x.x */
185+ byte[] byteAddr = getAddress();
186+ return byteAddr[0] == 127;
187+ }
188+
189+ /**
190+ * Utility routine to check if the InetAddress is an link local address.
191+ *
192+ * @return a <code>boolean</code> indicating if the InetAddress is
193+ * a link local address; or false if address is not a link local unicast address.
194+ * @since 1.4
195+ */
196+ public boolean isLinkLocalAddress() {
197+ // link-local unicast in IPv4 (169.254.0.0/16)
198+ // defined in "Documenting Special Use IPv4 Address Blocks
199+ // that have been Registered with IANA" by Bill Manning
200+ // draft-manning-dsua-06.txt
201+ return (((address >>> 24) & 0xFF) == 169)
202+ && (((address >>> 16) & 0xFF) == 254);
203+ }
204+
205+ /**
206+ * Utility routine to check if the InetAddress is a site local address.
207+ *
208+ * @return a <code>boolean</code> indicating if the InetAddress is
209+ * a site local address; or false if address is not a site local unicast address.
210+ * @since 1.4
211+ */
212+ public boolean isSiteLocalAddress() {
213+ // refer to RFC 1918
214+ // 10/8 prefix
215+ // 172.16/12 prefix
216+ // 192.168/16 prefix
217+ return (((address >>> 24) & 0xFF) == 10)
218+ || ((((address >>> 24) & 0xFF) == 172)
219+ && (((address >>> 16) & 0xF0) == 16))
220+ || ((((address >>> 24) & 0xFF) == 192)
221+ && (((address >>> 16) & 0xFF) == 168));
222+ }
223+
224+ /**
225+ * Utility routine to check if the multicast address has global scope.
226+ *
227+ * @return a <code>boolean</code> indicating if the address has
228+ * is a multicast address of global scope, false if it is not
229+ * of global scope or it is not a multicast address
230+ * @since 1.4
231+ */
232+ public boolean isMCGlobal() {
233+ // 224.0.1.0 to 238.255.255.255
234+ byte[] byteAddr = getAddress();
235+ return ((byteAddr[0] & 0xff) >= 224 && (byteAddr[0] & 0xff) <= 238 ) &&
236+ !((byteAddr[0] & 0xff) == 224 && byteAddr[1] == 0 &&
237+ byteAddr[2] == 0);
238+ }
239+
240+ /**
241+ * Utility routine to check if the multicast address has node scope.
242+ *
243+ * @return a <code>boolean</code> indicating if the address has
244+ * is a multicast address of node-local scope, false if it is not
245+ * of node-local scope or it is not a multicast address
246+ * @since 1.4
247+ */
248+ public boolean isMCNodeLocal() {
249+ // unless ttl == 0
250+ return false;
251+ }
252+
253+ /**
254+ * Utility routine to check if the multicast address has link scope.
255+ *
256+ * @return a <code>boolean</code> indicating if the address has
257+ * is a multicast address of link-local scope, false if it is not
258+ * of link-local scope or it is not a multicast address
259+ * @since 1.4
260+ */
261+ public boolean isMCLinkLocal() {
262+ // 224.0.0/24 prefix and ttl == 1
263+ return (((address >>> 24) & 0xFF) == 224)
264+ && (((address >>> 16) & 0xFF) == 0)
265+ && (((address >>> 8) & 0xFF) == 0);
266+ }
267+
268+ /**
269+ * Utility routine to check if the multicast address has site scope.
270+ *
271+ * @return a <code>boolean</code> indicating if the address has
272+ * is a multicast address of site-local scope, false if it is not
273+ * of site-local scope or it is not a multicast address
274+ * @since 1.4
275+ */
276+ public boolean isMCSiteLocal() {
277+ // 239.255/16 prefix or ttl < 32
278+ return (((address >>> 24) & 0xFF) == 239)
279+ && (((address >>> 16) & 0xFF) == 255);
280+ }
281+
282+ /**
283+ * Utility routine to check if the multicast address has organization scope.
284+ *
285+ * @return a <code>boolean</code> indicating if the address has
286+ * is a multicast address of organization-local scope,
287+ * false if it is not of organization-local scope
288+ * or it is not a multicast address
289+ * @since 1.4
290+ */
291+ public boolean isMCOrgLocal() {
292+ // 239.192 - 239.195
293+ return (((address >>> 24) & 0xFF) == 239)
294+ && (((address >>> 16) & 0xFF) >= 192)
295+ && (((address >>> 16) & 0xFF) <= 195);
296+ }
297+
298+ /**
299+ * Returns the raw IP address of this <code>InetAddress</code>
300+ * object. The result is in network byte order: the highest order
301+ * byte of the address is in <code>getAddress()[0]</code>.
302+ *
303+ * @return the raw IP address of this object.
304+ */
305+ public byte[] getAddress() {
306+ byte[] addr = new byte[INADDRSZ];
307+
308+ addr[0] = (byte) ((address >>> 24) & 0xFF);
309+ addr[1] = (byte) ((address >>> 16) & 0xFF);
310+ addr[2] = (byte) ((address >>> 8) & 0xFF);
311+ addr[3] = (byte) (address & 0xFF);
312+ return addr;
313+ }
314+
315+ /**
316+ * Returns the IP address string in textual presentation form.
317+ *
318+ * @return the raw IP address in a string format.
319+ * @since JDK1.0.2
320+ */
321+ public String getHostAddress() {
322+ return numericToTextFormat(getAddress());
323+ }
324+
325+ /**
326+ * Returns a hashcode for this IP address.
327+ *
328+ * @return a hash code value for this IP address.
329+ */
330+ public int hashCode() {
331+ return address;
332+ }
333+
334+ /**
335+ * Compares this object against the specified object.
336+ * The result is <code>true</code> if and only if the argument is
337+ * not <code>null</code> and it represents the same IP address as
338+ * this object.
339+ * <p>
340+ * Two instances of <code>InetAddress</code> represent the same IP
341+ * address if the length of the byte arrays returned by
342+ * <code>getAddress</code> is the same for both, and each of the
343+ * array components is the same for the byte arrays.
344+ *
345+ * @param obj the object to compare against.
346+ * @return <code>true</code> if the objects are the same;
347+ * <code>false</code> otherwise.
348+ * @see java.net.InetAddress#getAddress()
349+ */
350+ public boolean equals(Object obj) {
351+ return (obj != null) && (obj instanceof Inet4Address) &&
352+ (((InetAddress)obj).address == address);
353+ }
354+
355+ // Utilities
356+ /*
357+ * Converts IPv4 binary address into a string suitable for presentation.
358+ *
359+ * @param src a byte array representing an IPv4 numeric address
360+ * @return a String representing the IPv4 address in
361+ * textual representation format
362+ * @since 1.4
363+ */
364+
365+ static String numericToTextFormat(byte[] src)
366+ {
367+ return (src[0] & 0xff) + "." + (src[1] & 0xff) + "." + (src[2] & 0xff) + "." + (src[3] & 0xff);
368+ }
369+
370+ /**
371+ * Perform class load-time initializations.
372+ */
373+ private static native void init();
374+}