This file is indexed.

/usr/share/php/Net/DNS2/RR.php is in php-net-dns2 1.3.2-2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */

/**
 * DNS Library for handling lookups and updates. 
 *
 * PHP Version 5
 *
 * Copyright (c) 2010, Mike Pultz <mike@mikepultz.com>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *
 *   * Neither the name of Mike Pultz nor the names of his contributors 
 *     may be used to endorse or promote products derived from this 
 *     software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRIC
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * @category  Networking
 * @package   Net_DNS2
 * @author    Mike Pultz <mike@mikepultz.com>
 * @copyright 2010 Mike Pultz <mike@mikepultz.com>
 * @license   http://www.opensource.org/licenses/bsd-license.php  BSD License
 * @version   SVN: $Id: RR.php 188 2013-03-31 01:25:46Z mike.pultz $
 * @link      http://pear.php.net/package/Net_DNS2
 * @since     File available since Release 0.6.0
 *
 */


/**
 * This is the base class for DNS Resource Records
 *
 * Each resource record type (defined in RR/*.php) extends this class for
 * base functionality.
 *
 * This class handles parsing and constructing the common parts of the DNS
 * resource records, while the RR specific functionality is handled in each
 * child class.
 *
 * DNS resource record format - RFC1035 section 4.1.3
 *
 *      0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5
 *    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 *    |                                               |
 *    /                                               /
 *    /                      NAME                     /
 *    |                                               |
 *    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 *    |                      TYPE                     |
 *    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 *    |                     CLASS                     |
 *    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 *    |                      TTL                      |
 *    |                                               |
 *    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 *    |                   RDLENGTH                    |
 *    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--|
 *    /                     RDATA                     /
 *    /                                               /
 *    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 *
 * @category Networking
 * @package  Net_DNS2
 * @author   Mike Pultz <mike@mikepultz.com>
 * @license  http://www.opensource.org/licenses/bsd-license.php  BSD License
 * @link     http://pear.php.net/package/Net_DNS2
 *
 */
abstract class Net_DNS2_RR
{
    /*
     * The name of the resource record
     */
    public $name;

    /*
     * The resource record type
     */
    public $type;

    /*
     * The resouce record class
     */
    public $class;

    /*
     * The time to live for this resource record
     */
    public $ttl;

    /*
     * The length of the rdata field
     */
    public $rdlength;

    /*
     * The resource record specific data as a packed binary string
     */
    public $rdata;

    /**
     * abstract definition - method to return a RR as a string; not to 
     * be confused with the __toString() magic method.
     *
     * @return string
     * @access protected
     *
     */
    abstract protected function rrToString();

    /**
     * abstract definition - parses a RR from a standard DNS config line
     *
     * @param array $rdata a string split line of values for the rdata
     *
     * @return boolean
     * @access protected
     *
     */
    abstract protected function rrFromString(array $rdata);

    /**
     * abstract definition - sets a Net_DNS2_RR from a Net_DNS2_Packet object
     *
     * @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet to parse the RR from
     *
     * @return boolean
     * @access protected
     *
     */
    abstract protected function rrSet(Net_DNS2_Packet &$packet);

    /**
     * abstract definition - returns a binary packet DNS RR object
     *
     * @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet use for 
     *                                 compressed names
     *
     * @return mixed                   either returns a binary packed string or 
     *                                 null on failure
     * @access protected
     *
     */
    abstract protected function rrGet(Net_DNS2_Packet &$packet);

    /**
     * Constructor - builds a new Net_DNS2_RR object
     *
     * @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet or null to create 
     *                                 an empty object
     * @param array           $rr      an array with RR parse values or null to 
     *                                 create an empty object
     *
     * @throws Net_DNS2_Exception
     * @access public
     *
     */
    public function __construct(Net_DNS2_Packet &$packet = null, array $rr = null)
    {
        if ( (!is_null($packet)) && (!is_null($rr)) ) {

            if ($this->set($packet, $rr) == false) {

                throw new Net_DNS2_Exception(
                    'failed to generate resource record',
                    Net_DNS2_Lookups::E_RR_INVALID
                );
            }
        } else {

            $class = Net_DNS2_Lookups::$rr_types_class_to_id[get_class($this)];
            if (isset($class)) {

                $this->type = Net_DNS2_Lookups::$rr_types_by_id[$class];
            }

            $this->class    = 'IN';
            $this->ttl      = 86400;
        }
    }

    /**
     * magic __toString() method to return the Net_DNS2_RR object object as a string
     *
     * @return string
     * @access public
     *
     */
    public function __toString()
    {
        return $this->name . '. ' . $this->ttl . ' ' . $this->class . 
            ' ' . $this->type . ' ' . $this->rrToString();
    }

    /**
     * return a formatted string; if a string has spaces in it, then return 
     * it with double quotes around it, otherwise, return it as it was passed in.
     *
     * @param string $string the string to format
     *
     * @return string
     * @access protected
     *
     */
    protected function formatString($string)
    {
        return '"' . str_replace('"', '\"', trim($string, '"')) . '"';
    }
    
    /**
     * builds an array of strings from an array of chunks of text split by spaces
     *
     * @param array $chunks an array of chunks of text split by spaces
     *
     * @return array
     * @access protected
     *
     */
    protected function buildString(array $chunks)
    {
        $data = array();
        $c = 0;
        $in = false;

        foreach ($chunks as $r) {

            $r = trim($r);
            if (strlen($r) == 0) {
                continue;
            }

            if ( ($r[0] == '"')
                && ($r[strlen($r) - 1] == '"')
                && ($r[strlen($r) - 2] != '\\')
            ) {

                $data[$c] = $r;
                ++$c;
                $in = false;

            } else if ($r[0] == '"') {

                $data[$c] = $r;
                $in = true;

            } else if ( ($r[strlen($r) - 1] == '"')
                && ($r[strlen($r) - 2] != '\\')
            ) {
            
                $data[$c] .= ' ' . $r;
                ++$c;  
                $in = false;

            } else {

                if ($in == true) {
                    $data[$c] .= ' ' . $r;
                } else {
                    $data[$c++] = $r;
                }
            }
        }        

        foreach ($data as $index => $string) {
            
            $data[$index] = str_replace('\"', '"', trim($string, '"'));
        }

        return $data;
    }

    /**
     * builds a new Net_DNS2_RR object
     *
     * @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet or null to create
     *                                 an empty object
     * @param array           $rr      an array with RR parse values or null to 
     *                                 create an empty object
     *
     * @return boolean
     * @throws Net_DNS2_Exception
     * @access public
     *
     */
    public function set(Net_DNS2_Packet &$packet, array $rr)
    {
        $this->name     = $rr['name'];
        $this->type     = Net_DNS2_Lookups::$rr_types_by_id[$rr['type']];

        //
        // for RR OPT (41), the class value includes the requestors UDP payload size,
        // and not a class value
        //
        if ($this->type == 'OPT') {
            $this->class = $rr['class'];
        } else {
            $this->class = Net_DNS2_Lookups::$classes_by_id[$rr['class']];
        }

        $this->ttl      = $rr['ttl'];
        $this->rdlength = $rr['rdlength'];
        $this->rdata    = substr($packet->rdata, $packet->offset, $rr['rdlength']);

        return $this->rrSet($packet);
    }

    /**
     * returns a binary packed DNS RR object
     *
     * @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet used for 
     *                                 compressing names
     *
     * @return string
     * @throws Net_DNS2_Exception
     * @access public
     *
     */
    public function get(Net_DNS2_Packet &$packet)
    {
        $data  = '';
        $rdata = '';

        //
        // pack the name
        //
        $data = $packet->compress($this->name, $packet->offset);

        //
        // pack the main values
        //
        if ($this->type == 'OPT') {

            //
            // pre-build the TTL value
            //
            $this->preBuild();

            //
            // the class value is different for OPT types
            //
            $data .= pack(
                'nnN', 
                Net_DNS2_Lookups::$rr_types_by_name[$this->type],
                $this->class,
                $this->ttl
            );
        } else {

            $data .= pack(
                'nnN', 
                Net_DNS2_Lookups::$rr_types_by_name[$this->type],
                Net_DNS2_Lookups::$classes_by_name[$this->class],
                $this->ttl
            );
        }

        //
        // increase the offset, and allow for the rdlength
        //
        $packet->offset += 10;

        //
        // get the RR specific details
        //
        if ($this->rdlength != -1) {

            $rdata = $this->rrGet($packet);
        }

        //
        // add the RR
        //
        $data .= pack('n', strlen($rdata)) . $rdata;

        return $data;
    }

    /**
     * parses a binary packet, and returns the appropriate Net_DNS2_RR object, 
     * based on the RR type of the binary content.
     *
     * @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet used for 
     *                                 decompressing names
     *
     * @return mixed                   returns a new Net_DNS2_RR_* object for
     *                                 the given RR
     * @throws Net_DNS2_Exception
     * @access public
     *
     */
    public static function parse(Net_DNS2_Packet &$packet)
    {
        $object = array();

        //
        // expand the name
        //
        $object['name'] = $packet->expand($packet, $packet->offset);
        if (is_null($object['name'])) {

            throw new Net_DNS2_Exception(
                'failed to parse resource record: failed to expand name.',
                Net_DNS2_Lookups::E_PARSE_ERROR
            );
        }
        if ($packet->rdlength < ($packet->offset + 10)) {

            throw new Net_DNS2_Exception(
                'failed to parse resource record: packet too small.',
                Net_DNS2_Lookups::E_PARSE_ERROR
            );
        }

        //
        // unpack the RR details
        //
        $object['type']     = ord($packet->rdata[$packet->offset++]) << 8 | 
                                ord($packet->rdata[$packet->offset++]);
        $object['class']    = ord($packet->rdata[$packet->offset++]) << 8 | 
                                ord($packet->rdata[$packet->offset++]);

        $object['ttl']      = ord($packet->rdata[$packet->offset++]) << 24 | 
                                ord($packet->rdata[$packet->offset++]) << 16 | 
                                ord($packet->rdata[$packet->offset++]) << 8 | 
                                ord($packet->rdata[$packet->offset++]);

        $object['rdlength'] = ord($packet->rdata[$packet->offset++]) << 8 | 
                                ord($packet->rdata[$packet->offset++]);

        if ($packet->rdlength < ($packet->offset + $object['rdlength'])) {
            return null;
        }

        //
        // lookup the class to use
        //
        $o      = null;
        $class  = Net_DNS2_Lookups::$rr_types_id_to_class[$object['type']];

        if (isset($class)) {

            $o = new $class($packet, $object);
            if ($o) {

                $packet->offset += $object['rdlength'];
            }
        } else {

            throw new Net_DNS2_Exception(
                'un-implemented resource record type: ' . $object['type'],
                Net_DNS2_Lookups::E_RR_INVALID
            );
        }

        return $o;
    }

    /**
     * cleans up some RR data
     * 
     * @param string $data the text string to clean
     *
     * @return string returns the cleaned string
     *
     * @access public
     *
     */
    public function cleanString($data)
    {
        return strtolower(rtrim($data, '.'));
    }

    /**
     * parses a standard RR format lines, as defined by rfc1035 (kinda)
     *
     * In our implementation, the domain *must* be specified- format must be
     *
     *        <name> [<ttl>] [<class>] <type> <rdata>
     * or
     *        <name> [<class>] [<ttl>] <type> <rdata>
     *
     * name, title, class and type are parsed by this function, rdata is passed
     * to the RR specific classes for parsing.
     *
     * @param string $line a standard DNS config line 
     *
     * @return mixed       returns a new Net_DNS2_RR_* object for the given RR
     * @throws Net_DNS2_Exception
     * @access public
     *
     */
    public static function fromString($line)
    {
        if (strlen($line) == 0) {
            throw new Net_DNS2_Exception(
                'empty config line provided.',
                Net_DNS2_Lookups::E_PARSE_ERROR
            );
        }

        $name   = '';
        $type   = '';
        $class  = 'IN';
        $ttl    = 86400;

        //
        // split the line by spaces
        //
        $values = preg_split('/[\s]+/', $line);
        if (count($values) < 3) {

            throw new Net_DNS2_Exception(
                'failed to parse config: minimum of name, type and rdata required.',
                Net_DNS2_Lookups::E_PARSE_ERROR
            );
        }

        //
        // assume the first value is the name
        //
        $name = trim(strtolower(array_shift($values)), '.');

        //
        // The next value is either a TTL, Class or Type
        //
        foreach ($values as $value) {

            switch($value) {
            case is_numeric($value):

                $ttl = array_shift($values);
                break;

            //
            // PHP SUCKS!
            //
            case ($value === 0):
                $ttl = array_shift($values);
                break;

            case isset(Net_DNS2_Lookups::$classes_by_name[strtoupper($value)]):

                $class = strtoupper(array_shift($values));
                break;

            case isset(Net_DNS2_Lookups::$rr_types_by_name[strtoupper($value)]):

                $type = strtoupper(array_shift($values));
                break 2;
                break;   
            default:

                throw new Net_DNS2_Exception(
                    'invalid config line provided: unknown file: ' . $value,
                    Net_DNS2_Lookups::E_PARSE_ERROR
                );
            }
        }

        //
        // lookup the class to use
        //
        $o = null;
        $class_name = Net_DNS2_Lookups::$rr_types_id_to_class[
            Net_DNS2_Lookups::$rr_types_by_name[$type]
        ];

        if (isset($class_name)) {

            $o = new $class_name;
            if (!is_null($o)) {

                //
                // set the parsed values
                //
                $o->name    = $name;
                $o->class   = $class;
                $o->ttl     = $ttl;

                //
                // parse the rdata
                //
                if ($o->rrFromString($values) === false) {

                    throw new Net_DNS2_Exception(
                        'failed to parse rdata for config: ' . $line,
                        Net_DNS2_Lookups::E_PARSE_ERROR
                    );
                }

            } else {

                throw new Net_DNS2_Exception(
                    'failed to create new RR record for type: ' . $type,
                    Net_DNS2_Lookups::E_RR_INVALID
                );
            }

        } else {

            throw new Net_DNS2_Exception(
                'un-implemented resource record type: '. $type,
                Net_DNS2_Lookups::E_RR_INVALID
            );
        }

        return $o;
    }
}

/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * c-hanging-comment-ender-p: nil
 * End:
 */
?>