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
|
<?php
/*
** Zabbix
** Copyright (C) 2001-2023 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
/**
* A parser for DNS address.
*/
class CDnsParser extends CParser {
/**
* @var CUserMacroParser
*/
private $user_macro_parser;
/**
* @var CLLDMacroParser
*/
private $lld_macro_parser;
/**
* @var CLLDMacroFunctionParser
*/
private $lld_macro_function_parser;
/**
* Supported options:
* 'usermacros' => true Enabled support of user macros;
* 'lldmacros' => true Enabled support of LLD macros;
* 'macros' => true Enabled support of all macros;
* 'macros' => [] Allows array with list of macros. Empty array or false means no macros supported.
*
* @var array
*/
private $options = [
'usermacros' => false,
'lldmacros' => false,
'macros' => []
];
/**
* @param array $options
*/
public function __construct(array $options = []) {
if (array_key_exists('usermacros', $options)) {
$this->options['usermacros'] = $options['usermacros'];
}
if (array_key_exists('lldmacros', $options)) {
$this->options['lldmacros'] = $options['lldmacros'];
}
if (array_key_exists('macros', $options)) {
$this->options['macros'] = $options['macros'];
}
if ($this->options['usermacros']) {
$this->user_macro_parser = new CUserMacroParser();
}
if ($this->options['lldmacros']) {
$this->lld_macro_parser = new CLLDMacroParser();
$this->lld_macro_function_parser = new CLLDMacroFunctionParser();
}
if ($this->options['macros']) {
$this->macro_parser = new CMacroParser(['macros' => $this->options['macros']]);
}
}
/**
* @param string $source
* @param int $pos
*
* @return int
*/
public function parse($source, $pos = 0) {
$this->length = 0;
$this->match = '';
$p = $pos;
while (isset($source[$p])) {
if (preg_match('/^[A-Za-z0-9][A-Za-z0-9_-]*(\.[A-Za-z0-9_-]+)*\.?/', substr($source, $p), $matches)) {
$p += strlen($matches[0]);
}
elseif ($this->options['usermacros'] && $this->user_macro_parser->parse($source, $p) != self::PARSE_FAIL) {
$p += $this->user_macro_parser->getLength();
}
elseif ($this->options['lldmacros'] && $this->lld_macro_parser->parse($source, $p) != self::PARSE_FAIL) {
$p += $this->lld_macro_parser->getLength();
}
elseif ($this->options['lldmacros']
&& $this->lld_macro_function_parser->parse($source, $p) != self::PARSE_FAIL) {
$p += $this->lld_macro_function_parser->getLength();
}
elseif ($this->options['macros'] && $this->macro_parser->parse($source, $p) != self::PARSE_FAIL) {
$p += $this->macro_parser->getLength();
}
else {
break;
}
}
$length = $p - $pos;
if ($length == 0 || $length > 255) {
return self::PARSE_FAIL;
}
$this->length = $length;
$this->match = substr($source, $pos, $this->length);
return isset($source[$p]) ? self::PARSE_SUCCESS_CONT : self::PARSE_SUCCESS;
}
}
|
