root / drupal7 / sites / all / libraries / simplepie / library / SimplePie / Net / IPv6.php @ 41cc1b08
1 | 41cc1b08 | Assos Assos | <?php
|
---|---|---|---|
2 | /**
|
||
3 | * SimplePie
|
||
4 | *
|
||
5 | * A PHP-Based RSS and Atom Feed Framework.
|
||
6 | * Takes the hard work out of managing a complete RSS/Atom solution.
|
||
7 | *
|
||
8 | * Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
|
||
9 | * All rights reserved.
|
||
10 | *
|
||
11 | * Redistribution and use in source and binary forms, with or without modification, are
|
||
12 | * permitted provided that the following conditions are met:
|
||
13 | *
|
||
14 | * * Redistributions of source code must retain the above copyright notice, this list of
|
||
15 | * conditions and the following disclaimer.
|
||
16 | *
|
||
17 | * * Redistributions in binary form must reproduce the above copyright notice, this list
|
||
18 | * of conditions and the following disclaimer in the documentation and/or other materials
|
||
19 | * provided with the distribution.
|
||
20 | *
|
||
21 | * * Neither the name of the SimplePie Team nor the names of its contributors may be used
|
||
22 | * to endorse or promote products derived from this software without specific prior
|
||
23 | * written permission.
|
||
24 | *
|
||
25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
|
||
26 | * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
||
27 | * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
|
||
28 | * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||
30 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
31 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
||
32 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||
33 | * POSSIBILITY OF SUCH DAMAGE.
|
||
34 | *
|
||
35 | * @package SimplePie
|
||
36 | * @version 1.3.1
|
||
37 | * @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue
|
||
38 | * @author Ryan Parman
|
||
39 | * @author Geoffrey Sneddon
|
||
40 | * @author Ryan McCue
|
||
41 | * @link http://simplepie.org/ SimplePie
|
||
42 | * @license http://www.opensource.org/licenses/bsd-license.php BSD License
|
||
43 | */
|
||
44 | |||
45 | |||
46 | /**
|
||
47 | * Class to validate and to work with IPv6 addresses.
|
||
48 | *
|
||
49 | * @package SimplePie
|
||
50 | * @subpackage HTTP
|
||
51 | * @copyright 2003-2005 The PHP Group
|
||
52 | * @license http://www.opensource.org/licenses/bsd-license.php
|
||
53 | * @link http://pear.php.net/package/Net_IPv6
|
||
54 | * @author Alexander Merz <alexander.merz@web.de>
|
||
55 | * @author elfrink at introweb dot nl
|
||
56 | * @author Josh Peck <jmp at joshpeck dot org>
|
||
57 | * @author Geoffrey Sneddon <geoffers@gmail.com>
|
||
58 | */
|
||
59 | class SimplePie_Net_IPv6 |
||
60 | { |
||
61 | /**
|
||
62 | * Uncompresses an IPv6 address
|
||
63 | *
|
||
64 | * RFC 4291 allows you to compress concecutive zero pieces in an address to
|
||
65 | * '::'. This method expects a valid IPv6 address and expands the '::' to
|
||
66 | * the required number of zero pieces.
|
||
67 | *
|
||
68 | * Example: FF01::101 -> FF01:0:0:0:0:0:0:101
|
||
69 | * ::1 -> 0:0:0:0:0:0:0:1
|
||
70 | *
|
||
71 | * @author Alexander Merz <alexander.merz@web.de>
|
||
72 | * @author elfrink at introweb dot nl
|
||
73 | * @author Josh Peck <jmp at joshpeck dot org>
|
||
74 | * @copyright 2003-2005 The PHP Group
|
||
75 | * @license http://www.opensource.org/licenses/bsd-license.php
|
||
76 | * @param string $ip An IPv6 address
|
||
77 | * @return string The uncompressed IPv6 address
|
||
78 | */
|
||
79 | public static function uncompress($ip) |
||
80 | { |
||
81 | $c1 = -1; |
||
82 | $c2 = -1; |
||
83 | if (substr_count($ip, '::') === 1) |
||
84 | { |
||
85 | list($ip1, $ip2) = explode('::', $ip); |
||
86 | if ($ip1 === '') |
||
87 | { |
||
88 | $c1 = -1; |
||
89 | } |
||
90 | else
|
||
91 | { |
||
92 | $c1 = substr_count($ip1, ':'); |
||
93 | } |
||
94 | if ($ip2 === '') |
||
95 | { |
||
96 | $c2 = -1; |
||
97 | } |
||
98 | else
|
||
99 | { |
||
100 | $c2 = substr_count($ip2, ':'); |
||
101 | } |
||
102 | if (strpos($ip2, '.') !== false) |
||
103 | { |
||
104 | $c2++;
|
||
105 | } |
||
106 | // ::
|
||
107 | if ($c1 === -1 && $c2 === -1) |
||
108 | { |
||
109 | $ip = '0:0:0:0:0:0:0:0'; |
||
110 | } |
||
111 | // ::xxx
|
||
112 | else if ($c1 === -1) |
||
113 | { |
||
114 | $fill = str_repeat('0:', 7 - $c2); |
||
115 | $ip = str_replace('::', $fill, $ip); |
||
116 | } |
||
117 | // xxx::
|
||
118 | else if ($c2 === -1) |
||
119 | { |
||
120 | $fill = str_repeat(':0', 7 - $c1); |
||
121 | $ip = str_replace('::', $fill, $ip); |
||
122 | } |
||
123 | // xxx::xxx
|
||
124 | else
|
||
125 | { |
||
126 | $fill = ':' . str_repeat('0:', 6 - $c2 - $c1); |
||
127 | $ip = str_replace('::', $fill, $ip); |
||
128 | } |
||
129 | } |
||
130 | return $ip; |
||
131 | } |
||
132 | |||
133 | /**
|
||
134 | * Compresses an IPv6 address
|
||
135 | *
|
||
136 | * RFC 4291 allows you to compress concecutive zero pieces in an address to
|
||
137 | * '::'. This method expects a valid IPv6 address and compresses consecutive
|
||
138 | * zero pieces to '::'.
|
||
139 | *
|
||
140 | * Example: FF01:0:0:0:0:0:0:101 -> FF01::101
|
||
141 | * 0:0:0:0:0:0:0:1 -> ::1
|
||
142 | *
|
||
143 | * @see uncompress()
|
||
144 | * @param string $ip An IPv6 address
|
||
145 | * @return string The compressed IPv6 address
|
||
146 | */
|
||
147 | public static function compress($ip) |
||
148 | { |
||
149 | // Prepare the IP to be compressed
|
||
150 | $ip = self::uncompress($ip); |
||
151 | $ip_parts = self::split_v6_v4($ip); |
||
152 | |||
153 | // Replace all leading zeros
|
||
154 | $ip_parts[0] = preg_replace('/(^|:)0+([0-9])/', '\1\2', $ip_parts[0]); |
||
155 | |||
156 | // Find bunches of zeros
|
||
157 | if (preg_match_all('/(?:^|:)(?:0(?::|$))+/', $ip_parts[0], $matches, PREG_OFFSET_CAPTURE)) |
||
158 | { |
||
159 | $max = 0; |
||
160 | $pos = null; |
||
161 | foreach ($matches[0] as $match) |
||
162 | { |
||
163 | if (strlen($match[0]) > $max) |
||
164 | { |
||
165 | $max = strlen($match[0]); |
||
166 | $pos = $match[1]; |
||
167 | } |
||
168 | } |
||
169 | |||
170 | $ip_parts[0] = substr_replace($ip_parts[0], '::', $pos, $max); |
||
171 | } |
||
172 | |||
173 | if ($ip_parts[1] !== '') |
||
174 | { |
||
175 | return implode(':', $ip_parts); |
||
176 | } |
||
177 | else
|
||
178 | { |
||
179 | return $ip_parts[0]; |
||
180 | } |
||
181 | } |
||
182 | |||
183 | /**
|
||
184 | * Splits an IPv6 address into the IPv6 and IPv4 representation parts
|
||
185 | *
|
||
186 | * RFC 4291 allows you to represent the last two parts of an IPv6 address
|
||
187 | * using the standard IPv4 representation
|
||
188 | *
|
||
189 | * Example: 0:0:0:0:0:0:13.1.68.3
|
||
190 | * 0:0:0:0:0:FFFF:129.144.52.38
|
||
191 | *
|
||
192 | * @param string $ip An IPv6 address
|
||
193 | * @return array [0] contains the IPv6 represented part, and [1] the IPv4 represented part
|
||
194 | */
|
||
195 | private static function split_v6_v4($ip) |
||
196 | { |
||
197 | if (strpos($ip, '.') !== false) |
||
198 | { |
||
199 | $pos = strrpos($ip, ':'); |
||
200 | $ipv6_part = substr($ip, 0, $pos); |
||
201 | $ipv4_part = substr($ip, $pos + 1); |
||
202 | return array($ipv6_part, $ipv4_part); |
||
203 | } |
||
204 | else
|
||
205 | { |
||
206 | return array($ip, ''); |
||
207 | } |
||
208 | } |
||
209 | |||
210 | /**
|
||
211 | * Checks an IPv6 address
|
||
212 | *
|
||
213 | * Checks if the given IP is a valid IPv6 address
|
||
214 | *
|
||
215 | * @param string $ip An IPv6 address
|
||
216 | * @return bool true if $ip is a valid IPv6 address
|
||
217 | */
|
||
218 | public static function check_ipv6($ip) |
||
219 | { |
||
220 | $ip = self::uncompress($ip); |
||
221 | list($ipv6, $ipv4) = self::split_v6_v4($ip); |
||
222 | $ipv6 = explode(':', $ipv6); |
||
223 | $ipv4 = explode('.', $ipv4); |
||
224 | if (count($ipv6) === 8 && count($ipv4) === 1 || count($ipv6) === 6 && count($ipv4) === 4) |
||
225 | { |
||
226 | foreach ($ipv6 as $ipv6_part) |
||
227 | { |
||
228 | // The section can't be empty
|
||
229 | if ($ipv6_part === '') |
||
230 | return false; |
||
231 | |||
232 | // Nor can it be over four characters
|
||
233 | if (strlen($ipv6_part) > 4) |
||
234 | return false; |
||
235 | |||
236 | // Remove leading zeros (this is safe because of the above)
|
||
237 | $ipv6_part = ltrim($ipv6_part, '0'); |
||
238 | if ($ipv6_part === '') |
||
239 | $ipv6_part = '0'; |
||
240 | |||
241 | // Check the value is valid
|
||
242 | $value = hexdec($ipv6_part); |
||
243 | if (dechex($value) !== strtolower($ipv6_part) || $value < 0 || $value > 0xFFFF) |
||
244 | return false; |
||
245 | } |
||
246 | if (count($ipv4) === 4) |
||
247 | { |
||
248 | foreach ($ipv4 as $ipv4_part) |
||
249 | { |
||
250 | $value = (int) $ipv4_part; |
||
251 | if ((string) $value !== $ipv4_part || $value < 0 || $value > 0xFF) |
||
252 | return false; |
||
253 | } |
||
254 | } |
||
255 | return true; |
||
256 | } |
||
257 | else
|
||
258 | { |
||
259 | return false; |
||
260 | } |
||
261 | } |
||
262 | |||
263 | /**
|
||
264 | * Checks if the given IP is a valid IPv6 address
|
||
265 | *
|
||
266 | * @codeCoverageIgnore
|
||
267 | * @deprecated Use {@see SimplePie_Net_IPv6::check_ipv6()} instead
|
||
268 | * @see check_ipv6
|
||
269 | * @param string $ip An IPv6 address
|
||
270 | * @return bool true if $ip is a valid IPv6 address
|
||
271 | */
|
||
272 | public static function checkIPv6($ip) |
||
273 | { |
||
274 | return self::check_ipv6($ip); |
||
275 | } |
||
276 | } |