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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

Showing the changes to java/pkg/sun/net/util/IPAddressUtil.java (1 of 18352 files). Show all

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java/pkg/sun/net/util/IPAddressUtil.java+304−0
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1+/*
2+ * Copyright (c) 2004, 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+
26+package sun.net.util;
27+
28+public class IPAddressUtil {
29+ private final static int INADDR4SZ = 4;
30+ private final static int INADDR16SZ = 16;
31+ private final static int INT16SZ = 2;
32+
33+ /*
34+ * Converts IPv4 address in its textual presentation form
35+ * into its numeric binary form.
36+ *
37+ * @param src a String representing an IPv4 address in standard format
38+ * @return a byte array representing the IPv4 numeric address
39+ */
40+ public static byte[] textToNumericFormatV4(String src)
41+ {
42+ if (src.length() == 0) {
43+ return null;
44+ }
45+
46+ byte[] res = new byte[INADDR4SZ];
47+ String[] s = src.split("\\.", -1);
48+ long val;
49+ try {
50+ switch(s.length) {
51+ case 1:
52+ /*
53+ * When only one part is given, the value is stored directly in
54+ * the network address without any byte rearrangement.
55+ */
56+
57+ val = Long.parseLong(s[0]);
58+ if (val < 0 || val > 0xffffffffL)
59+ return null;
60+ res[0] = (byte) ((val >> 24) & 0xff);
61+ res[1] = (byte) (((val & 0xffffff) >> 16) & 0xff);
62+ res[2] = (byte) (((val & 0xffff) >> 8) & 0xff);
63+ res[3] = (byte) (val & 0xff);
64+ break;
65+ case 2:
66+ /*
67+ * When a two part address is supplied, the last part is
68+ * interpreted as a 24-bit quantity and placed in the right
69+ * most three bytes of the network address. This makes the
70+ * two part address format convenient for specifying Class A
71+ * network addresses as net.host.
72+ */
73+
74+ val = Integer.parseInt(s[0]);
75+ if (val < 0 || val > 0xff)
76+ return null;
77+ res[0] = (byte) (val & 0xff);
78+ val = Integer.parseInt(s[1]);
79+ if (val < 0 || val > 0xffffff)
80+ return null;
81+ res[1] = (byte) ((val >> 16) & 0xff);
82+ res[2] = (byte) (((val & 0xffff) >> 8) &0xff);
83+ res[3] = (byte) (val & 0xff);
84+ break;
85+ case 3:
86+ /*
87+ * When a three part address is specified, the last part is
88+ * interpreted as a 16-bit quantity and placed in the right
89+ * most two bytes of the network address. This makes the
90+ * three part address format convenient for specifying
91+ * Class B net- work addresses as 128.net.host.
92+ */
93+ for (int i = 0; i < 2; i++) {
94+ val = Integer.parseInt(s[i]);
95+ if (val < 0 || val > 0xff)
96+ return null;
97+ res[i] = (byte) (val & 0xff);
98+ }
99+ val = Integer.parseInt(s[2]);
100+ if (val < 0 || val > 0xffff)
101+ return null;
102+ res[2] = (byte) ((val >> 8) & 0xff);
103+ res[3] = (byte) (val & 0xff);
104+ break;
105+ case 4:
106+ /*
107+ * When four parts are specified, each is interpreted as a
108+ * byte of data and assigned, from left to right, to the
109+ * four bytes of an IPv4 address.
110+ */
111+ for (int i = 0; i < 4; i++) {
112+ val = Integer.parseInt(s[i]);
113+ if (val < 0 || val > 0xff)
114+ return null;
115+ res[i] = (byte) (val & 0xff);
116+ }
117+ break;
118+ default:
119+ return null;
120+ }
121+ } catch(NumberFormatException e) {
122+ return null;
123+ }
124+ return res;
125+ }
126+
127+ /*
128+ * Convert IPv6 presentation level address to network order binary form.
129+ * credit:
130+ * Converted from C code from Solaris 8 (inet_pton)
131+ *
132+ * Any component of the string following a per-cent % is ignored.
133+ *
134+ * @param src a String representing an IPv6 address in textual format
135+ * @return a byte array representing the IPv6 numeric address
136+ */
137+ public static byte[] textToNumericFormatV6(String src)
138+ {
139+ // Shortest valid string is "::", hence at least 2 chars
140+ if (src.length() < 2) {
141+ return null;
142+ }
143+
144+ int colonp;
145+ char ch;
146+ boolean saw_xdigit;
147+ int val;
148+ char[] srcb = src.toCharArray();
149+ byte[] dst = new byte[INADDR16SZ];
150+
151+ int srcb_length = srcb.length;
152+ int pc = src.indexOf ("%");
153+ if (pc == srcb_length -1) {
154+ return null;
155+ }
156+
157+ if (pc != -1) {
158+ srcb_length = pc;
159+ }
160+
161+ colonp = -1;
162+ int i = 0, j = 0;
163+ /* Leading :: requires some special handling. */
164+ if (srcb[i] == ':')
165+ if (srcb[++i] != ':')
166+ return null;
167+ int curtok = i;
168+ saw_xdigit = false;
169+ val = 0;
170+ while (i < srcb_length) {
171+ ch = srcb[i++];
172+ int chval = Character.digit(ch, 16);
173+ if (chval != -1) {
174+ val <<= 4;
175+ val |= chval;
176+ if (val > 0xffff)
177+ return null;
178+ saw_xdigit = true;
179+ continue;
180+ }
181+ if (ch == ':') {
182+ curtok = i;
183+ if (!saw_xdigit) {
184+ if (colonp != -1)
185+ return null;
186+ colonp = j;
187+ continue;
188+ } else if (i == srcb_length) {
189+ return null;
190+ }
191+ if (j + INT16SZ > INADDR16SZ)
192+ return null;
193+ dst[j++] = (byte) ((val >> 8) & 0xff);
194+ dst[j++] = (byte) (val & 0xff);
195+ saw_xdigit = false;
196+ val = 0;
197+ continue;
198+ }
199+ if (ch == '.' && ((j + INADDR4SZ) <= INADDR16SZ)) {
200+ String ia4 = src.substring(curtok, srcb_length);
201+ /* check this IPv4 address has 3 dots, ie. A.B.C.D */
202+ int dot_count = 0, index=0;
203+ while ((index = ia4.indexOf ('.', index)) != -1) {
204+ dot_count ++;
205+ index ++;
206+ }
207+ if (dot_count != 3) {
208+ return null;
209+ }
210+ byte[] v4addr = textToNumericFormatV4(ia4);
211+ if (v4addr == null) {
212+ return null;
213+ }
214+ for (int k = 0; k < INADDR4SZ; k++) {
215+ dst[j++] = v4addr[k];
216+ }
217+ saw_xdigit = false;
218+ break; /* '\0' was seen by inet_pton4(). */
219+ }
220+ return null;
221+ }
222+ if (saw_xdigit) {
223+ if (j + INT16SZ > INADDR16SZ)
224+ return null;
225+ dst[j++] = (byte) ((val >> 8) & 0xff);
226+ dst[j++] = (byte) (val & 0xff);
227+ }
228+
229+ if (colonp != -1) {
230+ int n = j - colonp;
231+
232+ if (j == INADDR16SZ)
233+ return null;
234+ for (i = 1; i <= n; i++) {
235+ dst[INADDR16SZ - i] = dst[colonp + n - i];
236+ dst[colonp + n - i] = 0;
237+ }
238+ j = INADDR16SZ;
239+ }
240+ if (j != INADDR16SZ)
241+ return null;
242+ byte[] newdst = convertFromIPv4MappedAddress(dst);
243+ if (newdst != null) {
244+ return newdst;
245+ } else {
246+ return dst;
247+ }
248+ }
249+
250+ /**
251+ * @param src a String representing an IPv4 address in textual format
252+ * @return a boolean indicating whether src is an IPv4 literal address
253+ */
254+ public static boolean isIPv4LiteralAddress(String src) {
255+ return textToNumericFormatV4(src) != null;
256+ }
257+
258+ /**
259+ * @param src a String representing an IPv6 address in textual format
260+ * @return a boolean indicating whether src is an IPv6 literal address
261+ */
262+ public static boolean isIPv6LiteralAddress(String src) {
263+ return textToNumericFormatV6(src) != null;
264+ }
265+
266+ /*
267+ * Convert IPv4-Mapped address to IPv4 address. Both input and
268+ * returned value are in network order binary form.
269+ *
270+ * @param src a String representing an IPv4-Mapped address in textual format
271+ * @return a byte array representing the IPv4 numeric address
272+ */
273+ public static byte[] convertFromIPv4MappedAddress(byte[] addr) {
274+ if (isIPv4MappedAddress(addr)) {
275+ byte[] newAddr = new byte[INADDR4SZ];
276+ System.arraycopy(addr, 12, newAddr, 0, INADDR4SZ);
277+ return newAddr;
278+ }
279+ return null;
280+ }
281+
282+ /**
283+ * Utility routine to check if the InetAddress is an
284+ * IPv4 mapped IPv6 address.
285+ *
286+ * @return a <code>boolean</code> indicating if the InetAddress is
287+ * an IPv4 mapped IPv6 address; or false if address is IPv4 address.
288+ */
289+ private static boolean isIPv4MappedAddress(byte[] addr) {
290+ if (addr.length < INADDR16SZ) {
291+ return false;
292+ }
293+ if ((addr[0] == 0x00) && (addr[1] == 0x00) &&
294+ (addr[2] == 0x00) && (addr[3] == 0x00) &&
295+ (addr[4] == 0x00) && (addr[5] == 0x00) &&
296+ (addr[6] == 0x00) && (addr[7] == 0x00) &&
297+ (addr[8] == 0x00) && (addr[9] == 0x00) &&
298+ (addr[10] == (byte)0xff) &&
299+ (addr[11] == (byte)0xff)) {
300+ return true;
301+ }
302+ return false;
303+ }
304+}