summaryrefslogtreecommitdiffstats
path: root/etc/inc/openvpn.attributes.php
blob: b8b04770908cf2440677ab4dad37a572b9494c21 (plain)
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
<?php
/*
        Copyright (C) 2011-2012         Ermal Luçi
        All rights reserved.

        Redistribution and use in source and binary forms, with or without
        modification, are permitted provided that the following conditions are met:

        1. Redistributions of source code must retain the above copyright notice,
           this list of conditions and the following disclaimer.

        2. 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.

        THIS SOFTWARE IS PROVIDED ``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
        AUTHOR 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, STRICT 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.
*/

if (empty($common_name)) {
	$common_name = getenv("common_name");
	if (empty($common_name))
		$common_name = getenv("username");
}

$devname = getenv("dev");
if (empty($devname))
	$devname = "openvpn";

function cisco_to_cidr($addr) {
	if (!is_ipaddr($addr))
		return 0;
	$mask = decbin(~ip2long($addr));
	$mask = substr($mask, -32);
	$k = 0;
	for ($i = 0; $i <= 32; $i++) {
		$k += intval($mask[$i]);
	}
	return $k;
}

function cisco_extract_index($prule) {
	
	$index = explode("#", $prule);
	if (is_numeric($index[1]))
		return intval($index[1]);
	else
		syslog(LOG_WARNING, "Error parsing rule {$prule}: Could not extract index");
	return -1;;
}

function parse_cisco_acl($attribs) {
	global $devname, $attributes;
	if (!is_array($attribs))
		return "";
	$finalrules = "";
	if (is_array($attribs['ciscoavpair'])) {
		$inrules = array();
		$outrules = array();
		foreach ($attribs['ciscoavpair'] as $avrules) {
			$rule = explode("=", $avrules);
			$dir = "";
			if (strstr($rule[0], "inacl")) {
				$dir = "in";
			} else if (strstr($rule[0], "outacl"))
				$dir = "out";
			else if (strstr($rule[0], "dns-servers")) {
				$attributes['dns-servers'] = explode(" ", $rule[1]);
				continue;
			} else if (strstr($rule[0], "route")) {
				if (!is_array($attributes['routes']))
					$attributes['routes'] = array();
				$attributes['routes'][] = $route[1];
				continue;
			}	
			$rindex = cisco_extract_index($rule[0]);
			if ($rindex < 0)
				continue;

			$rule = $rule[1];
			$rule = explode(" ", $rule);
			$tmprule = "";
			$index = 0;
			$isblock = false;
			if ($rule[$index] == "permit")
				$tmprule = "pass {$dir} quick on {$devname} ";
			else if ($rule[$index] == "deny") {
				//continue;
				$isblock = true;
				$tmprule = "block {$dir} quick on {$devname} ";
			} else {
				continue;
			}

			$index++;

			switch ($rule[$index]) {
			case "tcp":
			case "udp":
				$tmprule .= "proto {$rule[$index]} ";
				break;
				
			}

			$index++;
			/* Source */
			if (trim($rule[$index]) == "host") {
				$index++;
				$tmprule .= "from {$rule[$index]} ";
				$index++;
				if ($isblock == true)
					$isblock = false;
			} else if (trim($rule[$index]) == "any") {
				$tmprule .= "from any";
				$index++;
			} else {
				$tmprule .= "from $rule[$index]";
				$index++;
				$netmask = cisco_to_cidr($rule[$index]);
				$tmprule .= "/{$netmask} ";
				$index++;
				if ($isblock == true)
					$isblock = false;
			}
			/* Destination */
			if (trim($rule[$index]) == "host") {
				$index++;
				$tmprule .= "to {$rule[$index]} ";
				$index++;
				if ($isblock == true)
					$isblock = false;
			} else if (trim($rule[$index]) == "any") {
				$index++;
				$tmprule .= "to any";
			} else {
				$tmprule .= "to $rule[$index]";
				$index++;
				$netmask = cisco_to_cidr($rule[$index]);
				$tmprule .= "/{$netmask} ";
				$index++;
				if ($isblock == true)
					$isblock = false;
			}

			if ($isblock == true)
				continue;

			if ($dir == "in")
				$inrules[$rindex] = $tmprule;
			else if ($dir == "out")
				$outrules[$rindex] = $tmprule;
		}


		$state = "";
		if (!empty($outrules))
			$state = "no state";
		ksort($inrules, SORT_NUMERIC);
		foreach ($inrules as $inrule)
			$finalrules .= "{$inrule} {$state}\n";
		if (!empty($outrules)) {
			ksort($outrules, SORT_NUMERIC);
			foreach ($outrules as $outrule)
				$finalrules .= "{$outrule} {$state}\n";
		}
	}
	return $finalrules;
}

$rules = parse_cisco_acl($attributes);
if (!empty($rules)) {
	@file_put_contents("/tmp/{$common_name}.rules", $rules);
	mwexec("/sbin/pfctl -a \"openvpn/{$common_name}\" -f {$g['tmp_path']}/{$common_name}.rules");
	@unlink("{$g['tmp_path']}/{$common_name}.rules");
}

?>
OpenPOWER on IntegriCloud