|
1
|
<?php
|
|
2
|
/* $Id$ */
|
|
3
|
/*
|
|
4
|
util.inc
|
|
5
|
part of m0n0wall (http://m0n0.ch/wall)
|
|
6
|
|
|
7
|
Copyright (C) 2003-2004 Manuel Kasper <mk@neon1.net>.
|
|
8
|
All rights reserved.
|
|
9
|
|
|
10
|
Redistribution and use in source and binary forms, with or without
|
|
11
|
modification, are permitted provided that the following conditions are met:
|
|
12
|
|
|
13
|
1. Redistributions of source code must retain the above copyright notice,
|
|
14
|
this list of conditions and the following disclaimer.
|
|
15
|
|
|
16
|
2. Redistributions in binary form must reproduce the above copyright
|
|
17
|
notice, this list of conditions and the following disclaimer in the
|
|
18
|
documentation and/or other materials provided with the distribution.
|
|
19
|
|
|
20
|
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
21
|
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
22
|
AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
23
|
AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
|
|
24
|
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
25
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
26
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
27
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
28
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
29
|
POSSIBILITY OF SUCH DAMAGE.
|
|
30
|
*/
|
|
31
|
|
|
32
|
/* kill a process by pid file */
|
|
33
|
function killbypid($pidfile) {
|
|
34
|
sigkillbypid($pidfile, "TERM");
|
|
35
|
}
|
|
36
|
|
|
37
|
/* sigkill a process by pid file */
|
|
38
|
function sigkillbypid($pidfile, $sig) {
|
|
39
|
if (file_exists($pidfile)) {
|
|
40
|
mwexec("/bin/kill -s $sig `/bin/cat " . $pidfile . "`");
|
|
41
|
}
|
|
42
|
}
|
|
43
|
|
|
44
|
/* kill a process by name */
|
|
45
|
function killbyname($procname) {
|
|
46
|
mwexec("/usr/bin/killall " . escapeshellarg($procname));
|
|
47
|
}
|
|
48
|
|
|
49
|
/* return the subnet address given a host address and a subnet bit count */
|
|
50
|
function gen_subnet($ipaddr, $bits) {
|
|
51
|
if (!is_ipaddr($ipaddr) || !is_numeric($bits))
|
|
52
|
return "";
|
|
53
|
|
|
54
|
return long2ip(ip2long($ipaddr) & gen_subnet_mask_long($bits));
|
|
55
|
}
|
|
56
|
|
|
57
|
/* return the highest (broadcast) address in the subnet given a host address and a subnet bit count */
|
|
58
|
function gen_subnet_max($ipaddr, $bits) {
|
|
59
|
if (!is_ipaddr($ipaddr) || !is_numeric($bits))
|
|
60
|
return "";
|
|
61
|
|
|
62
|
return long2ip(ip2long($ipaddr) | ~gen_subnet_mask_long($bits));
|
|
63
|
}
|
|
64
|
|
|
65
|
/* returns a subnet mask (long given a bit count) */
|
|
66
|
function gen_subnet_mask_long($bits) {
|
|
67
|
$sm = 0;
|
|
68
|
for ($i = 0; $i < $bits; $i++) {
|
|
69
|
$sm >>= 1;
|
|
70
|
$sm |= 0x80000000;
|
|
71
|
}
|
|
72
|
return $sm;
|
|
73
|
}
|
|
74
|
|
|
75
|
/* same as above but returns a string */
|
|
76
|
function gen_subnet_mask($bits) {
|
|
77
|
return long2ip(gen_subnet_mask_long($bits));
|
|
78
|
}
|
|
79
|
|
|
80
|
function is_numericint($arg) {
|
|
81
|
return (preg_match("/[^0-9]/", $arg) ? false : true);
|
|
82
|
}
|
|
83
|
|
|
84
|
/* returns true if $ipaddr is a valid dotted IPv4 address */
|
|
85
|
function is_ipaddr($ipaddr) {
|
|
86
|
if (!is_string($ipaddr))
|
|
87
|
return false;
|
|
88
|
|
|
89
|
$ip_long = ip2long($ipaddr);
|
|
90
|
$ip_reverse = long2ip($ip_long);
|
|
91
|
|
|
92
|
if ($ipaddr == $ip_reverse)
|
|
93
|
return true;
|
|
94
|
else
|
|
95
|
return false;
|
|
96
|
}
|
|
97
|
|
|
98
|
/* returns true if $ipaddr is a valid dotted IPv4 address or an alias thereof */
|
|
99
|
function is_ipaddroralias($ipaddr) {
|
|
100
|
|
|
101
|
global $aliastable;
|
|
102
|
|
|
103
|
if (isset($aliastable[$ipaddr]) && is_ipaddr($aliastable[$ipaddr]))
|
|
104
|
return true;
|
|
105
|
else
|
|
106
|
return is_ipaddr($ipaddr);
|
|
107
|
}
|
|
108
|
|
|
109
|
/* returns true if $ipaddr is a valid dotted IPv4 address or any alias */
|
|
110
|
function is_ipaddroranyalias($ipaddr) {
|
|
111
|
|
|
112
|
global $aliastable;
|
|
113
|
|
|
114
|
if (isset($aliastable[$ipaddr]))
|
|
115
|
return true;
|
|
116
|
else
|
|
117
|
return is_ipaddr($ipaddr);
|
|
118
|
}
|
|
119
|
|
|
120
|
/* returns true if $subnet is a valid subnet in CIDR format */
|
|
121
|
function is_subnet($subnet) {
|
|
122
|
if (!is_string($subnet))
|
|
123
|
return false;
|
|
124
|
|
|
125
|
list($hp,$np) = explode('/', $subnet);
|
|
126
|
|
|
127
|
if (!is_ipaddr($hp))
|
|
128
|
return false;
|
|
129
|
|
|
130
|
if (!is_numeric($np) || ($np < 1) || ($np > 32))
|
|
131
|
return false;
|
|
132
|
|
|
133
|
return true;
|
|
134
|
}
|
|
135
|
|
|
136
|
/* returns true if $subnet is a valid subnet in CIDR format or an alias thereof */
|
|
137
|
function is_subnetoralias($subnet) {
|
|
138
|
|
|
139
|
global $aliastable;
|
|
140
|
|
|
141
|
if (isset($aliastable[$subnet]) && is_subnet($aliastable[$subnet]))
|
|
142
|
return true;
|
|
143
|
else
|
|
144
|
return is_subnet($subnet);
|
|
145
|
}
|
|
146
|
|
|
147
|
/* returns true if $hostname is a valid hostname */
|
|
148
|
function is_hostname($hostname) {
|
|
149
|
if (!is_string($hostname))
|
|
150
|
return false;
|
|
151
|
|
|
152
|
if (preg_match("/^[a-z0-9\-]+$/i", $hostname))
|
|
153
|
return true;
|
|
154
|
else
|
|
155
|
return false;
|
|
156
|
}
|
|
157
|
|
|
158
|
/* returns true if $domain is a valid domain name */
|
|
159
|
function is_domain($domain) {
|
|
160
|
if (!is_string($domain))
|
|
161
|
return false;
|
|
162
|
|
|
163
|
if (preg_match("/^([a-z0-9\-]+\.?)*$/i", $domain))
|
|
164
|
return true;
|
|
165
|
else
|
|
166
|
return false;
|
|
167
|
}
|
|
168
|
|
|
169
|
/* returns true if $uname is a valid DynDNS username */
|
|
170
|
function is_dyndns_username($uname) {
|
|
171
|
if (!is_string($uname))
|
|
172
|
return false;
|
|
173
|
|
|
174
|
if (preg_match("/[^a-z0-9\-.@_]/i", $uname))
|
|
175
|
return false;
|
|
176
|
else
|
|
177
|
return true;
|
|
178
|
}
|
|
179
|
|
|
180
|
/* returns true if $macaddr is a valid MAC address */
|
|
181
|
function is_macaddr($macaddr) {
|
|
182
|
if (!is_string($macaddr))
|
|
183
|
return false;
|
|
184
|
|
|
185
|
$maca = explode(":", $macaddr);
|
|
186
|
if (count($maca) != 6)
|
|
187
|
return false;
|
|
188
|
|
|
189
|
foreach ($maca as $macel) {
|
|
190
|
if (($macel === "") || (strlen($macel) > 2))
|
|
191
|
return false;
|
|
192
|
if (preg_match("/[^0-9a-f]/i", $macel))
|
|
193
|
return false;
|
|
194
|
}
|
|
195
|
|
|
196
|
return true;
|
|
197
|
}
|
|
198
|
|
|
199
|
/* returns true if $name is a valid name for an alias */
|
|
200
|
function is_validaliasname($name) {
|
|
201
|
if (!preg_match("/[^a-zA-Z0-9]/", $name))
|
|
202
|
return true;
|
|
203
|
else
|
|
204
|
return false;
|
|
205
|
}
|
|
206
|
|
|
207
|
/* returns true if $port is a valid TCP/UDP port */
|
|
208
|
function is_port($port) {
|
|
209
|
if (!is_numericint($port))
|
|
210
|
return false;
|
|
211
|
|
|
212
|
if (($port < 1) || ($port > 65535))
|
|
213
|
return false;
|
|
214
|
else
|
|
215
|
return true;
|
|
216
|
}
|
|
217
|
|
|
218
|
/* returns a list of interfaces with MAC addresses
|
|
219
|
(skips VLAN and other virtual interfaces) */
|
|
220
|
function get_interface_list() {
|
|
221
|
/* build interface list with netstat */
|
|
222
|
exec("/usr/bin/netstat -inW -f link", $linkinfo);
|
|
223
|
array_shift($linkinfo);
|
|
224
|
|
|
225
|
$iflist = array();
|
|
226
|
|
|
227
|
foreach ($linkinfo as $link) {
|
|
228
|
$alink = preg_split("/\s+/", $link);
|
|
229
|
$ifname = chop($alink[0]);
|
|
230
|
|
|
231
|
if (substr($ifname, -1) == "*")
|
|
232
|
$ifname = substr($ifname, 0, strlen($ifname) - 1);
|
|
233
|
|
|
234
|
if (!preg_match("/^(plip|pflog|ppp|sl|gif|faith|lo|ng|vlan)/", $ifname)) {
|
|
235
|
$iflist[$ifname] = array();
|
|
236
|
|
|
237
|
$iflist[$ifname]['mac'] = chop($alink[3]);
|
|
238
|
$iflist[$ifname]['up'] = false;
|
|
239
|
|
|
240
|
/* find out if the link on this interface is up */
|
|
241
|
unset($ifinfo);
|
|
242
|
exec("/sbin/ifconfig {$ifname}", $ifinfo);
|
|
243
|
|
|
244
|
foreach ($ifinfo as $ifil) {
|
|
245
|
if (preg_match("/status: (.*)$/", $ifil, $matches)) {
|
|
246
|
if ($matches[1] == "active")
|
|
247
|
$iflist[$ifname]['up'] = true;
|
|
248
|
break;
|
|
249
|
}
|
|
250
|
}
|
|
251
|
}
|
|
252
|
}
|
|
253
|
|
|
254
|
return $iflist;
|
|
255
|
}
|
|
256
|
|
|
257
|
/* wrapper for exec() */
|
|
258
|
function mwexec($command) {
|
|
259
|
|
|
260
|
global $g;
|
|
261
|
|
|
262
|
if ($g['debug']) {
|
|
263
|
if (!$_SERVER['REMOTE_ADDR'])
|
|
264
|
echo "mwexec(): $command\n";
|
|
265
|
passthru($command, $retval);
|
|
266
|
} else {
|
|
267
|
exec("$command > /dev/null 2>&1", $oarr, $retval);
|
|
268
|
}
|
|
269
|
|
|
270
|
return $retval;
|
|
271
|
}
|
|
272
|
|
|
273
|
/* wrapper for exec() in background */
|
|
274
|
function mwexec_bg($command) {
|
|
275
|
|
|
276
|
global $g;
|
|
277
|
|
|
278
|
if ($g['debug']) {
|
|
279
|
if (!$_SERVER['REMOTE_ADDR'])
|
|
280
|
echo "mwexec(): $command\n";
|
|
281
|
}
|
|
282
|
|
|
283
|
exec("nohup $command > /dev/null 2>&1 &");
|
|
284
|
}
|
|
285
|
|
|
286
|
/* unlink a file, if it exists */
|
|
287
|
function unlink_if_exists($fn) {
|
|
288
|
$to_do = glob($fn);
|
|
289
|
if(is_array($to_do)) {
|
|
290
|
foreach($to_do as $filename)
|
|
291
|
if (file_exists($filename) && !is_dir($filename)) unlink($filename);
|
|
292
|
} else {
|
|
293
|
if (file_exists($fn)) unlink($fn);
|
|
294
|
}
|
|
295
|
}
|
|
296
|
|
|
297
|
/* make a global alias table (for faster lookups) */
|
|
298
|
function alias_make_table($config) {
|
|
299
|
|
|
300
|
global $aliastable;
|
|
301
|
|
|
302
|
$aliastable = array();
|
|
303
|
|
|
304
|
if (is_array($config['aliases']['alias'])) {
|
|
305
|
foreach ($config['aliases']['alias'] as $alias) {
|
|
306
|
if ($alias['name'])
|
|
307
|
$aliastable[$alias['name']] = $alias['address'];
|
|
308
|
}
|
|
309
|
}
|
|
310
|
}
|
|
311
|
|
|
312
|
/* check if an alias exists */
|
|
313
|
function is_alias($name) {
|
|
314
|
|
|
315
|
global $aliastable;
|
|
316
|
|
|
317
|
return isset($aliastable[$name]);
|
|
318
|
}
|
|
319
|
|
|
320
|
/* expand a host or network alias, if necessary */
|
|
321
|
function alias_expand($name) {
|
|
322
|
|
|
323
|
global $aliastable;
|
|
324
|
|
|
325
|
if (isset($aliastable[$name]))
|
|
326
|
return $aliastable[$name];
|
|
327
|
else if (is_ipaddr($name) || is_subnet($name))
|
|
328
|
return $name;
|
|
329
|
else
|
|
330
|
return null;
|
|
331
|
}
|
|
332
|
|
|
333
|
/* expand a host alias, if necessary */
|
|
334
|
function alias_expand_host($name) {
|
|
335
|
|
|
336
|
global $aliastable;
|
|
337
|
|
|
338
|
if (isset($aliastable[$name]) && is_ipaddr($aliastable[$name]))
|
|
339
|
return $aliastable[$name];
|
|
340
|
else if (is_ipaddr($name))
|
|
341
|
return $name;
|
|
342
|
else
|
|
343
|
return null;
|
|
344
|
}
|
|
345
|
|
|
346
|
/* expand a network alias, if necessary */
|
|
347
|
function alias_expand_net($name) {
|
|
348
|
|
|
349
|
global $aliastable;
|
|
350
|
|
|
351
|
if (isset($aliastable[$name]) && is_subnet($aliastable[$name]))
|
|
352
|
return $aliastable[$name];
|
|
353
|
else if (is_subnet($name))
|
|
354
|
return $name;
|
|
355
|
else
|
|
356
|
return null;
|
|
357
|
}
|
|
358
|
|
|
359
|
/* find out whether two subnets overlap */
|
|
360
|
function check_subnets_overlap($subnet1, $bits1, $subnet2, $bits2) {
|
|
361
|
|
|
362
|
if (!is_numeric($bits1))
|
|
363
|
$bits1 = 32;
|
|
364
|
if (!is_numeric($bits2))
|
|
365
|
$bits2 = 32;
|
|
366
|
|
|
367
|
if ($bits1 < $bits2)
|
|
368
|
$relbits = $bits1;
|
|
369
|
else
|
|
370
|
$relbits = $bits2;
|
|
371
|
|
|
372
|
$sn1 = gen_subnet_mask_long($relbits) & ip2long($subnet1);
|
|
373
|
$sn2 = gen_subnet_mask_long($relbits) & ip2long($subnet2);
|
|
374
|
|
|
375
|
if ($sn1 == $sn2)
|
|
376
|
return true;
|
|
377
|
else
|
|
378
|
return false;
|
|
379
|
}
|
|
380
|
|
|
381
|
/* compare two IP addresses */
|
|
382
|
function ipcmp($a, $b) {
|
|
383
|
if (ip2long($a) < ip2long($b))
|
|
384
|
return -1;
|
|
385
|
else if (ip2long($a) > ip2long($b))
|
|
386
|
return 1;
|
|
387
|
else
|
|
388
|
return 0;
|
|
389
|
}
|
|
390
|
|
|
391
|
/* return true if $addr is in $subnet, false if not */
|
|
392
|
function ip_in_subnet($addr,$subnet) {
|
|
393
|
list($ip, $mask) = explode('/', $subnet);
|
|
394
|
$mask = 0xffffffff << (32 - $mask);
|
|
395
|
return ((ip2long($addr) & $mask) == (ip2long($ip) & $mask));
|
|
396
|
}
|
|
397
|
|
|
398
|
/* verify (and remove) the digital signature on a file - returns 0 if OK */
|
|
399
|
function verify_digital_signature($fname) {
|
|
400
|
|
|
401
|
global $g;
|
|
402
|
|
|
403
|
return mwexec("/usr/local/bin/verifysig " .
|
|
404
|
escapeshellarg("{$g['etc_path']}/pubkey.pem") . " " .
|
|
405
|
escapeshellarg($fname));
|
|
406
|
}
|
|
407
|
|
|
408
|
/* obtain MAC address given an IP address by looking at the ARP table */
|
|
409
|
function arp_get_mac_by_ip($ip) {
|
|
410
|
mwexec("/sbin/ping -c 1 -t 1 {$ip}");
|
|
411
|
exec("/usr/sbin/arp -n {$ip}", $arpoutput);
|
|
412
|
|
|
413
|
if ($arpoutput[0]) {
|
|
414
|
$arpi = explode(" ", $arpoutput[0]);
|
|
415
|
$macaddr = $arpi[3];
|
|
416
|
if (is_macaddr($macaddr))
|
|
417
|
return $macaddr;
|
|
418
|
else
|
|
419
|
return false;
|
|
420
|
}
|
|
421
|
|
|
422
|
return false;
|
|
423
|
}
|
|
424
|
|
|
425
|
/* return a fieldname that is safe for xml usage */
|
|
426
|
function xml_safe_fieldname($fieldname) {
|
|
427
|
$replace = array('/', '-', ' ', '!', '@', '#', '$', '%', '^', '&', '*', '(', ')',
|
|
428
|
'_', '+', '=', '{', '}', '[', ']', '|', '/', '<', '>', '?',
|
|
429
|
':', ',', '.', '\'', '\\'
|
|
430
|
);
|
|
431
|
return strtolower(str_replace($replace, "", $fieldname));
|
|
432
|
}
|
|
433
|
|
|
434
|
?>
|