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
|
<?php
/*
$Id$
part of m0n0wall (http://m0n0.ch/wall)
Copyright (C) 2003-2006 Manuel Kasper <mk@neon1.net>.
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.
*/
require_once("functions.inc");
header("Expires: 0");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
$orig_host = $_ENV['HTTP_HOST'];
$orig_request = $_GET['redirurl'];
$clientip = $_SERVER['REMOTE_ADDR'];
if (!$clientip) {
/* not good - bail out */
echo "An error occured. Please check the system logs for more information.";
log_error("Captive portal could not deterimine clients ip address.");
exit;
}
if (isset($config['captiveportal']['httpslogin']))
$ourhostname = $config['captiveportal']['httpsname'] . ":8001";
else
$ourhostname = $config['interfaces'][$config['captiveportal']['interface']]['ipaddr'] . ":8000";
if ($orig_host != $ourhostname) {
/* the client thinks it's connected to the desired web server, but instead
it's connected to us. Issue a redirect... */
if (isset($config['captiveportal']['httpslogin']))
header("Location: https://{$ourhostname}/index.php?redirurl=" . urlencode("http://{$orig_host}{$orig_request}"));
else
header("Location: http://{$ourhostname}/index.php?redirurl=" . urlencode("http://{$orig_host}{$orig_request}"));
exit;
}
if (preg_match("/redirurl=(.*)/", $orig_request, $matches))
$redirurl = urldecode($matches[1]);
if ($_POST['redirurl'])
$redirurl = $_POST['redirurl'];
$macfilter = !isset($config['captiveportal']['nomacfilter']);
/* find MAC address for client */
$clientmac = arp_get_mac_by_ip($clientip);
if (!$clientmac && $macfilter) {
/* unable to find MAC address - shouldn't happen! - bail out */
captiveportal_logportalauth("unauthenticated","noclientmac",$clientip,"ERROR");
echo "An error occured. Please check the system logs for more information.";
log_error("Captive portal could not deterimine clients MAC address. Disable MAC address filtering in captive portal if you do not needs this functionality.");
exit;
}
/* find out if we need RADIUS + RADIUSMAC or not */
if (file_exists("{$g['vardb_path']}/captiveportal_radius.db")) {
$radius_enable = TRUE;
if ($radius_enable && isset($config['captiveportal']['radmac_enable']))
$radmac_enable = TRUE;
}
if ($_POST['logout_id']) {
disconnect_client($_POST['logout_id']);
echo <<<EOD
<HTML>
<HEAD><TITLE>Disconnecting...</TITLE></HEAD>
<BODY BGCOLOR="#435370">
<SPAN STYLE="color: #ffffff; font-family: Tahoma, Verdana, Arial, Helvetica, sans-serif; font-size: 11px;">
<B>You have been disconnected.</B>
</SPAN>
<SCRIPT LANGUAGE="JavaScript">
<!--
setTimeout('window.close();',5000) ;
-->
</SCRIPT>
</BODY>
</HTML>
EOD;
/* The $macfilter can be removed safely since we first check if the $clientmac is present, if not we fail */
} else if ($clientmac && portal_mac_fixed($clientmac)) {
/* punch hole in ipfw for pass thru mac addresses */
portal_allow($clientip, $clientmac, "unauthenticated");
exit;
} else if ($clientmac && $radmac_enable && portal_mac_radius($clientmac,$clientip)) {
/* radius functions handle everything so we exit here since we're done */
exit;
} else if ($_POST['accept'] && $radius_enable) {
if ($_POST['auth_user'] && $_POST['auth_pass']) {
$auth_list = radius($_POST['auth_user'],$_POST['auth_pass'],$clientip,$clientmac,"USER LOGIN");
if ($auth_list['auth_val'] == 1) {
captiveportal_logportalauth($_POST['auth_user'],$clientmac,$clientip,"ERROR",$auth_list['error']);
portal_reply_page($redirurl, "error", $auth_list['error']);
}
else if ($auth_list['auth_val'] == 3) {
captiveportal_logportalauth($_POST['auth_user'],$clientmac,$clientip,"FAILURE",$auth_list['reply_message']);
portal_reply_page($redirurl, "error", $auth_list['reply_message']);
}
} else {
captiveportal_logportalauth($_POST['auth_user'],$clientmac,$clientip,"ERROR");
portal_reply_page($redirurl, "error");
}
} else if ($_POST['accept'] && $config['captiveportal']['auth_method'] == "local") {
//check against local usermanager
$userdb = &$config['captiveportal']['user'];
$loginok = false;
//erase expired accounts
if (is_array($userdb)) {
$moddb = false;
for ($i = 0; $i < count($userdb); $i++) {
if ($userdb[$i]['expirationdate'] && (strtotime("-1 day") > strtotime($userdb[$i]['expirationdate']))) {
unset($userdb[$i]);
$moddb = true;
}
}
if ($moddb)
write_config();
$userdb = &$config['captiveportal']['user'];
for ($i = 0; $i < count($userdb); $i++) {
if (($userdb[$i]['name'] == $_POST['auth_user']) && ($userdb[$i]['password'] == md5($_POST['auth_pass']))) {
$loginok = true;
break;
}
}
}
if ($loginok){
captiveportal_logportalauth($_POST['auth_user'],$clientmac,$clientip,"LOGIN");
portal_allow($clientip, $clientmac,$_POST['auth_user']);
} else {
captiveportal_logportalauth($_POST['auth_user'],$clientmac,$clientip,"FAILURE");
portal_reply_page($redirurl, "error");
}
} else if ($_POST['accept'] && $clientip) {
captiveportal_logportalauth("unauthenticated",$clientmac,$clientip,"ACCEPT");
portal_allow($clientip, $clientmac, "unauthenticated");
} else {
/* display captive portal page */
portal_reply_page($redirurl, "login",null,$clientmac,$clientip);
}
exit;
function portal_reply_page($redirurl, $type = null, $message = null, $clientmac = null, $clientip = null) {
global $g, $config;
/* Get captive portal layout */
if ($type == "login")
$htmltext = file_get_contents("{$g['varetc_path']}/captiveportal.html");
else
$htmltext = file_get_contents("{$g['varetc_path']}/captiveportal-error.html");
/* substitute other variables */
if (isset($config['captiveportal']['httpslogin']))
$htmltext = str_replace("\$PORTAL_ACTION\$", "https://{$config['captiveportal']['httpsname']}:8001/", $htmltext);
else
$htmltext = str_replace("\$PORTAL_ACTION\$", "http://{$config['interfaces'][$config['captiveportal']['interface']]['ipaddr']}:8000/", $htmltext);
$htmltext = str_replace("\$PORTAL_REDIRURL\$", htmlspecialchars($redirurl), $htmltext);
$htmltext = str_replace("\$PORTAL_MESSAGE\$", htmlspecialchars($message), $htmltext);
$htmltext = str_replace("\$CLIENT_MAC\$", htmlspecialchars($clientmac), $htmltext);
$htmltext = str_replace("\$CLIENT_IP\$", htmlspecialchars($clientip), $htmltext);
echo $htmltext;
}
function portal_mac_radius($clientmac,$clientip) {
global $config ;
$radmac_secret = $config['captiveportal']['radmac_secret'];
/* authentication against the radius server */
$username = mac_format($clientmac);
$auth_list = radius($username,$radmac_secret,$clientip,$clientmac,"MACHINE LOGIN");
if ($auth_list['auth_val'] == 2) {
return TRUE;
}
return FALSE;
}
function portal_allow($clientip,$clientmac,$username,$password = null, $attributes = null, $ruleno = null) {
global $redirurl, $g, $config, $url_redirection, $type;
/* See if a ruleno is passed, if not start locking the sessions because this means there isn't one atm */
if ($ruleno == null) {
captiveportal_lock();
$ruleno = captiveportal_get_next_ipfw_ruleno();
}
/* if the pool is empty, return appropriate message and exit */
if (is_null($ruleno)) {
portal_reply_page($redirurl, "error", "System reached maximum login capacity");
log_error("WARNING! Captive portal has reached maximum login capacity");
captiveportal_unlock();
exit;
}
// Ensure we create an array if we are missing attributes
if (!is_array($attributes))
$attributes = array();
/* read in client database */
$cpdb = captiveportal_read_db();
$radiusservers = captiveportal_get_radius_servers();
/* Find an existing session */
for ($i = 0; $i < count($cpdb); $i++) {
/* on the same ip */
if($cpdb[$i][2] == $clientip) {
captiveportal_logportalauth($cpdb[$i][4],$cpdb[$i][3],$cpdb[$i][2],"CONCURRENT LOGIN - REUSING OLD SESSION");
$sessionid = $cpdb[$i][5];
break;
}
elseif ((isset($config['captiveportal']['noconcurrentlogins'])) && ($username != 'unauthenticated')) {
/* on the same username */
if ($cpdb[$i][4] == $username) {
/* This user was already logged in so we disconnect the old one */
captiveportal_disconnect($cpdb[$i],$radiusservers,13);
captiveportal_logportalauth($cpdb[$i][4],$cpdb[$i][3],$cpdb[$i][2],"CONCURRENT LOGIN - TERMINATING OLD SESSION");
unset($cpdb[$i]);
break;
}
}
}
if (!isset($sessionid)) {
/* generate unique session ID */
$tod = gettimeofday();
$sessionid = substr(md5(mt_rand() . $tod['sec'] . $tod['usec'] . $clientip . $clientmac), 0, 16);
/* Add rules for traffic shaping
* We don't need to add extra l3 allow rules since traffic will pass due to the following kernel option
* net.inet.ip.fw.one_pass: 1
*/
$peruserbw = isset($config['captiveportal']['peruserbw']);
$bw_up = isset($attributes['bw_up']) ? trim($attributes['bw_up']) : $config['captiveportal']['bwdefaultup'];
$bw_down = isset($attributes['bw_down']) ? trim($attributes['bw_down']) : $config['captiveportal']['bwdefaultdn'];
if ($peruserbw && !empty($bw_up) && is_numeric($bw_up)) {
$bw_up_pipeno = $ruleno + 40500;
exec("/sbin/ipfw add $ruleno set 2 pipe $bw_up_pipeno ip from $clientip to any in");
exec("/sbin/ipfw pipe $bw_up_pipeno config bw {$bw_up}Kbit/s queue 100");
} else {
exec("/sbin/ipfw add $ruleno set 2 skipto 50000 ip from $clientip to any in");
}
if ($peruserbw && !empty($bw_down) && is_numeric($bw_down)) {
$bw_down_pipeno = $ruleno + 45500;
exec("/sbin/ipfw add $ruleno set 2 pipe $bw_down_pipeno ip from any to $clientip out");
exec("/sbin/ipfw pipe $bw_down_pipeno config bw {$bw_down}Kbit/s queue 100");
} else {
exec("/sbin/ipfw add $ruleno set 2 skipto 50000 ip from any to $clientip out");
}
/* add ipfw rules for layer 2 */
if (!isset($config['captiveportal']['nomacfilter'])) {
$l2ruleno = $ruleno + 10000;
exec("/sbin/ipfw add $l2ruleno set 3 deny all from $clientip to any not MAC any $clientmac layer2 in");
exec("/sbin/ipfw add $l2ruleno set 3 deny all from any to $clientip not MAC $clientmac any layer2 out");
}
/* encode password in Base64 just in case it contains commas */
$bpassword = base64_encode($password);
$cpdb[] = array(time(), $ruleno, $clientip, $clientmac, $username, $sessionid, $bpassword,
$attributes['session_timeout'],
$attributes['idle_timeout'],
$attributes['session_terminate_time']);
if (isset($config['captiveportal']['radacct_enable']) && isset($radiusservers[0])) {
$acct_val = RADIUS_ACCOUNTING_START($ruleno,
$username,
$sessionid,
$radiusservers[0]['ipaddr'],
$radiusservers[0]['acctport'],
$radiusservers[0]['key'],
$clientip,
$clientmac);
if ($acct_val == 1)
captiveportal_logportalauth($username,$clientmac,$clientip,$type,"RADIUS ACCOUNTING FAILED");
}
}
/* rewrite information to database */
captiveportal_write_db($cpdb);
/* redirect user to desired destination */
if ($url_redirection)
$my_redirurl = $url_redirection;
else if ($config['captiveportal']['redirurl'])
$my_redirurl = $config['captiveportal']['redirurl'];
else
$my_redirurl = $redirurl;
if(isset($config['captiveportal']['logoutwin_enable'])) {
if (isset($config['captiveportal']['httpslogin']))
$logouturl = "https://{$config['captiveportal']['httpsname']}:8001/";
else
$logouturl = "http://{$config['interfaces'][$config['captiveportal']['interface']]['ipaddr']}:8000/";
echo <<<EOD
<HTML>
<HEAD><TITLE>Redirecting...</TITLE></HEAD>
<BODY>
<SPAN STYLE="font-family: Tahoma, Verdana, Arial, Helvetica, sans-serif; font-size: 11px;">
<B>Redirecting to <A HREF="{$my_redirurl}">{$my_redirurl}</A>...</B>
</SPAN>
<SCRIPT LANGUAGE="JavaScript">
<!--
LogoutWin = window.open('', 'Logout', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=256,height=64');
if (LogoutWin) {
LogoutWin.document.write('<HTML>');
LogoutWin.document.write('<HEAD><TITLE>Logout</TITLE></HEAD>') ;
LogoutWin.document.write('<BODY BGCOLOR="#435370">');
LogoutWin.document.write('<DIV ALIGN="center" STYLE="color: #ffffff; font-family: Tahoma, Verdana, Arial, Helvetica, sans-serif; font-size: 11px;">') ;
LogoutWin.document.write('<B>Click the button below to disconnect</B><P>');
LogoutWin.document.write('<FORM METHOD="POST" ACTION="{$logouturl}">');
LogoutWin.document.write('<INPUT NAME="logout_id" TYPE="hidden" VALUE="{$sessionid}">');
LogoutWin.document.write('<INPUT NAME="logout" TYPE="submit" VALUE="Logout">');
LogoutWin.document.write('</FORM>');
LogoutWin.document.write('</DIV></BODY>');
LogoutWin.document.write('</HTML>');
LogoutWin.document.close();
}
document.location.href="{$my_redirurl}";
-->
</SCRIPT>
</BODY>
</HTML>
EOD;
} else {
captiveportal_unlock();
header("Location: " . $my_redirurl);
return $sessionid;
}
captiveportal_unlock();
return $sessionid;
}
/* remove a single client by session ID
by Dinesh Nair
*/
function disconnect_client($sessionid, $logoutReason = "LOGOUT", $term_cause = 1) {
global $g, $config;
captiveportal_lock();
/* read database */
$cpdb = captiveportal_read_db();
$radiusservers = captiveportal_get_radius_servers();
/* find entry */
for ($i = 0; $i < count($cpdb); $i++) {
if ($cpdb[$i][5] == $sessionid) {
captiveportal_disconnect($cpdb[$i],$radiusservers, $term_cause);
captiveportal_logportalauth($cpdb[$i][4],$cpdb[$i][3],$cpdb[$i][2],$logoutReason);
unset($cpdb[$i]);
break;
}
}
/* write database */
captiveportal_write_db($cpdb);
captiveportal_unlock();
}
?>
|
