1<?php
2/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
3
4/**
5 * DNS Library for handling lookups and updates.
6 *
7 * PHP Version 5
8 *
9 * Copyright (c) 2010, Mike Pultz <mike@mikepultz.com>.
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 *   * Redistributions of source code must retain the above copyright
17 *     notice, this list of conditions and the following disclaimer.
18 *
19 *   * Redistributions in binary form must reproduce the above copyright
20 *     notice, this list of conditions and the following disclaimer in
21 *     the documentation and/or other materials provided with the
22 *     distribution.
23 *
24 *   * Neither the name of Mike Pultz nor the names of his contributors
25 *     may be used to endorse or promote products derived from this
26 *     software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
31 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
32 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
33 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
34 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
35 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
36 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRIC
37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
38 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
39 * POSSIBILITY OF SUCH DAMAGE.
40 *
41 * @category  Networking
42 * @package   Net_DNS2
43 * @author    Mike Pultz <mike@mikepultz.com>
44 * @copyright 2010 Mike Pultz <mike@mikepultz.com>
45 * @license   http://www.opensource.org/licenses/bsd-license.php  BSD License
46 * @version   SVN: $Id: A.php 113 2011-07-25 02:54:19Z mike.pultz $
47 * @link      http://pear.php.net/package/Net_DNS2
48 * @since     File available since Release 0.6.0
49 *
50 */
51
52/**
53 * A Resource Record - RFC1035 section 3.4.1
54 *
55 *    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
56 *    |                    ADDRESS                    |
57 *    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
58 *
59 * @category Networking
60 * @package  Net_DNS2
61 * @author   Mike Pultz <mike@mikepultz.com>
62 * @license  http://www.opensource.org/licenses/bsd-license.php  BSD License
63 * @link     http://pear.php.net/package/Net_DNS2
64 * @see      Net_DNS2_RR
65 *
66 */
67class Net_DNS2_RR_A extends Net_DNS2_RR
68{
69    /*
70     * The IPv4 address in quad-dotted notation
71     */
72    public $address;
73
74    /**
75     * method to return the rdata portion of the packet as a string
76     *
77     * @return  string
78     * @access  protected
79     *
80     */
81    protected function rrToString()
82    {
83        return $this->address;
84    }
85
86    /**
87     * parses the rdata portion from a standard DNS config line
88     *
89     * @param array $rdata a string split line of values for the rdata
90     *
91     * @return boolean
92     * @access protected
93     *
94     */
95    protected function rrFromString(array $rdata)
96    {
97        $value = array_shift($rdata);
98
99        if (Net_DNS2::isIPv4($value) == true) {
100
101            $this->address = $value;
102            return true;
103        }
104
105        return false;
106    }
107
108    /**
109     * parses the rdata of the Net_DNS2_Packet object
110     *
111     * @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet to parse the RR from
112     *
113     * @return boolean
114     * @access protected
115     *
116     */
117    protected function rrSet(Net_DNS2_Packet &$packet)
118    {
119        if ($this->rdlength > 0) {
120
121            $this->address = inet_ntop($this->rdata);
122            if ($this->address !== false) {
123
124                return true;
125            }
126        }
127
128        return false;
129    }
130
131    /**
132     * returns the rdata portion of the DNS packet
133     *
134     * @param Net_DNS2_Packet &$packet a Net_DNS2_Packet packet use for
135     *                                 compressed names
136     *
137     * @return mixed                   either returns a binary packed
138     *                                 string or null on failure
139     * @access protected
140     *
141     */
142    protected function rrGet(Net_DNS2_Packet &$packet)
143    {
144        $packet->offset += 4;
145        return inet_pton($this->address);
146    }
147}
148
149/*
150 * Local variables:
151 * tab-width: 4
152 * c-basic-offset: 4
153 * c-hanging-comment-ender-p: nil
154 * End:
155 */
156?>
157