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<?php
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/*
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$Id$
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part of m0n0wall (http://m0n0.ch/wall)
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Copyright (C) 2003-2006 Manuel Kasper <mk@neon1.net>.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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require_once("functions.inc");
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header("Expires: 0");
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header("Cache-Control: no-store, no-cache, must-revalidate");
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header("Cache-Control: post-check=0, pre-check=0", false);
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header("Pragma: no-cache");
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$orig_host = $_ENV['HTTP_HOST'];
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$orig_request = $_GET['redirurl'];
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$clientip = $_SERVER['REMOTE_ADDR'];
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if (!$clientip) {
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/* not good - bail out */
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echo "An error occured. Please check the system logs for more information.";
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log_error("Captive portal could not deterimine clients ip address.");
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exit;
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}
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if (isset($config['captiveportal']['httpslogin']))
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$ourhostname = $config['captiveportal']['httpsname'] . ":8001";
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else
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$ourhostname = $config['interfaces'][$config['captiveportal']['interface']]['ipaddr'] . ":8000";
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if ($orig_host != $ourhostname) {
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/* the client thinks it's connected to the desired web server, but instead
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it's connected to us. Issue a redirect... */
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if (isset($config['captiveportal']['httpslogin']))
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header("Location: https://{$ourhostname}/index.php?redirurl=" . urlencode("http://{$orig_host}{$orig_request}"));
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else
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header("Location: http://{$ourhostname}/index.php?redirurl=" . urlencode("http://{$orig_host}{$orig_request}"));
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exit;
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}
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if (preg_match("/redirurl=(.*)/", $orig_request, $matches))
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$redirurl = urldecode($matches[1]);
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if ($_POST['redirurl'])
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$redirurl = $_POST['redirurl'];
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$macfilter = !isset($config['captiveportal']['nomacfilter']);
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/* find MAC address for client */
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$clientmac = arp_get_mac_by_ip($clientip);
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if (!$clientmac && $macfilter) {
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/* unable to find MAC address - shouldn't happen! - bail out */
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captiveportal_logportalauth("unauthenticated","noclientmac",$clientip,"ERROR");
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echo "An error occured. Please check the system logs for more information.";
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log_error("Captive portal could not deterimine clients MAC address. Disable MAC address filtering in captive portal if you do not needs this functionality.");
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exit;
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}
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/* find out if we need RADIUS + RADIUSMAC or not */
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if (file_exists("{$g['vardb_path']}/captiveportal_radius.db")) {
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$radius_enable = TRUE;
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if ($radius_enable && isset($config['captiveportal']['radmac_enable']))
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$radmac_enable = TRUE;
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}
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if ($_POST['logout_id']) {
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disconnect_client($_POST['logout_id']);
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echo <<<EOD
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<HTML>
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<HEAD><TITLE>Disconnecting...</TITLE></HEAD>
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<BODY BGCOLOR="#435370">
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<SPAN STYLE="color: #ffffff; font-family: Tahoma, Verdana, Arial, Helvetica, sans-serif; font-size: 11px;">
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<B>You have been disconnected.</B>
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</SPAN>
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<SCRIPT LANGUAGE="JavaScript">
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<!--
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setTimeout('window.close();',5000) ;
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-->
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</SCRIPT>
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</BODY>
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</HTML>
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EOD;
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/* The $macfilter can be removed safely since we first check if the $clientmac is present, if not we fail */
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} else if ($clientmac && portal_mac_fixed($clientmac)) {
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/* punch hole in ipfw for pass thru mac addresses */
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portal_allow($clientip, $clientmac, "unauthenticated");
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exit;
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} else if ($clientmac && $radmac_enable && portal_mac_radius($clientmac,$clientip)) {
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/* radius functions handle everything so we exit here since we're done */
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exit;
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} else if ($_POST['accept'] && $radius_enable) {
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if ($_POST['auth_user'] && $_POST['auth_pass']) {
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$auth_list = radius($_POST['auth_user'],$_POST['auth_pass'],$clientip,$clientmac,"USER LOGIN");
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if ($auth_list['auth_val'] == 1) {
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captiveportal_logportalauth($_POST['auth_user'],$clientmac,$clientip,"ERROR",$auth_list['error']);
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portal_reply_page($redirurl, "error", $auth_list['error']);
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}
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else if ($auth_list['auth_val'] == 3) {
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captiveportal_logportalauth($_POST['auth_user'],$clientmac,$clientip,"FAILURE",$auth_list['reply_message']);
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portal_reply_page($redirurl, "error", $auth_list['reply_message']);
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}
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} else {
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captiveportal_logportalauth($_POST['auth_user'],$clientmac,$clientip,"ERROR");
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portal_reply_page($redirurl, "error");
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}
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} else if ($_POST['accept'] && $config['captiveportal']['auth_method'] == "local") {
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//check against local usermanager
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$userdb = &$config['captiveportal']['user'];
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$loginok = false;
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//erase expired accounts
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if (is_array($userdb)) {
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$moddb = false;
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for ($i = 0; $i < count($userdb); $i++) {
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if ($userdb[$i]['expirationdate'] && (strtotime("-1 day") > strtotime($userdb[$i]['expirationdate']))) {
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unset($userdb[$i]);
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$moddb = true;
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}
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}
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if ($moddb)
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write_config();
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$userdb = &$config['captiveportal']['user'];
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for ($i = 0; $i < count($userdb); $i++) {
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if (($userdb[$i]['name'] == $_POST['auth_user']) && ($userdb[$i]['password'] == md5($_POST['auth_pass']))) {
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$loginok = true;
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break;
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}
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}
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}
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if ($loginok){
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captiveportal_logportalauth($_POST['auth_user'],$clientmac,$clientip,"LOGIN");
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portal_allow($clientip, $clientmac,$_POST['auth_user']);
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} else {
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captiveportal_logportalauth($_POST['auth_user'],$clientmac,$clientip,"FAILURE");
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portal_reply_page($redirurl, "error");
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}
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} else if ($_POST['accept'] && $clientip) {
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captiveportal_logportalauth("unauthenticated",$clientmac,$clientip,"ACCEPT");
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portal_allow($clientip, $clientmac, "unauthenticated");
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} else {
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/* display captive portal page */
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portal_reply_page($redirurl, "login");
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}
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exit;
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function portal_reply_page($redirurl, $type = null, $message = null) {
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global $g, $config;
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/* Get captive portal layout */
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if ($type == "login")
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$htmltext = file_get_contents("{$g['varetc_path']}/captiveportal.html");
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else
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$htmltext = file_get_contents("{$g['varetc_path']}/captiveportal-error.html");
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/* substitute other variables */
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if (isset($config['captiveportal']['httpslogin']))
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$htmltext = str_replace("\$PORTAL_ACTION\$", "https://{$config['captiveportal']['httpsname']}:8001/", $htmltext);
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else
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$htmltext = str_replace("\$PORTAL_ACTION\$", "http://{$config['interfaces'][$config['captiveportal']['interface']]['ipaddr']}:8000/", $htmltext);
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$htmltext = str_replace("\$PORTAL_REDIRURL\$", htmlspecialchars($redirurl), $htmltext);
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$htmltext = str_replace("\$PORTAL_MESSAGE\$", htmlspecialchars($message), $htmltext);
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echo $htmltext;
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}
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function portal_mac_fixed($clientmac) {
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global $g ;
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/* open captive portal mac db */
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if (file_exists("{$g['vardb_path']}/captiveportal_mac.db")) {
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$fd = @fopen("{$g['vardb_path']}/captiveportal_mac.db","r") ;
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if (!$fd) {
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return FALSE;
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}
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while (!feof($fd)) {
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$mac = trim(fgets($fd)) ;
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if(strcasecmp($clientmac, $mac) == 0) {
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fclose($fd) ;
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return TRUE ;
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}
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}
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fclose($fd) ;
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}
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return FALSE ;
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}
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function portal_mac_radius($clientmac,$clientip) {
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global $config ;
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$radmac_secret = $config['captiveportal']['radmac_secret'];
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/* authentication against the radius server */
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$username = mac_format($clientmac);
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$auth_list = radius($username,$radmac_secret,$clientip,$clientmac,"MACHINE LOGIN");
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if ($auth_list['auth_val'] == 2) {
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return TRUE;
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}
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return FALSE;
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}
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function portal_allow($clientip,$clientmac,$username,$password = null, $attributes = null, $ruleno = null) {
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global $redirurl, $g, $config, $url_redirection, $type;
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/* See if a ruleno is passed, if not start locking the sessions because this means there isn't one atm */
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if ($ruleno == null) {
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captiveportal_lock();
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$ruleno = captiveportal_get_next_ipfw_ruleno();
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}
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/* if the pool is empty, return appropriate message and exit */
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if (is_null($ruleno)) {
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portal_reply_page($redirurl, "error", "System reached maximum login capacity");
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log_error("WARNING! Captive portal has reached maximum login capacity");
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captiveportal_unlock();
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exit;
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}
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// Ensure we create an array if we are missing attributes
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if (!is_array($attributes))
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$attributes = array();
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260
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/* read in client database */
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$cpdb = captiveportal_read_db();
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$radiusservers = captiveportal_get_radius_servers();
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/* Find an existing session */
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for ($i = 0; $i < count($cpdb); $i++) {
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/* on the same ip */
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if($cpdb[$i][2] == $clientip) {
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captiveportal_logportalauth($cpdb[$i][4],$cpdb[$i][3],$cpdb[$i][2],"CONCURRENT LOGIN - REUSING OLD SESSION");
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$sessionid = $cpdb[$i][5];
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break;
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}
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elseif ((isset($config['captiveportal']['noconcurrentlogins'])) && ($username != 'unauthenticated')) {
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/* on the same username */
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if ($cpdb[$i][4] == $username) {
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/* This user was already logged in so we disconnect the old one */
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captiveportal_disconnect($cpdb[$i],$radiusservers,13);
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captiveportal_logportalauth($cpdb[$i][4],$cpdb[$i][3],$cpdb[$i][2],"CONCURRENT LOGIN - TERMINATING OLD SESSION");
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unset($cpdb[$i]);
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280
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break;
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281
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}
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282
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}
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283
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}
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284
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285
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if (!isset($sessionid)) {
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286
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287
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/* generate unique session ID */
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288
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$tod = gettimeofday();
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289
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$sessionid = substr(md5(mt_rand() . $tod['sec'] . $tod['usec'] . $clientip . $clientmac), 0, 16);
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290
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291
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/* Add rules for traffic shaping
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292
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* We don't need to add extra l3 allow rules since traffic will pass due to the following kernel option
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293
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* net.inet.ip.fw.one_pass: 1
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294
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*/
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295
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$peruserbw = isset($config['captiveportal']['peruserbw']);
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296
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297
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$bw_up = isset($attributes['bw_up']) ? trim($attributes['bw_up']) : $config['captiveportal']['bwdefaultup'];
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298
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$bw_down = isset($attributes['bw_down']) ? trim($attributes['bw_down']) : $config['captiveportal']['bwdefaultdn'];
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299
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300
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if ($peruserbw && !empty($bw_up) && is_numeric($bw_up)) {
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301
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$bw_up_pipeno = $ruleno + 40500;
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302
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exec("/sbin/ipfw add $ruleno set 2 pipe $bw_up_pipeno ip from $clientip to any in");
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303
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exec("/sbin/ipfw pipe $bw_up_pipeno config bw {$bw_up}Kbit/s queue 100");
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304
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} else {
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305
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exec("/sbin/ipfw add $ruleno set 2 skipto 50000 ip from $clientip to any in");
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306
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}
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307
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if ($peruserbw && !empty($bw_down) && is_numeric($bw_down)) {
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308
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$bw_down_pipeno = $ruleno + 45500;
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309
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exec("/sbin/ipfw add $ruleno set 2 pipe $bw_down_pipeno ip from any to $clientip out");
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310
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exec("/sbin/ipfw pipe $bw_down_pipeno config bw {$bw_down}Kbit/s queue 100");
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311
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} else {
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312
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exec("/sbin/ipfw add $ruleno set 2 skipto 50000 ip from any to $clientip out");
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313
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}
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314
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|
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315
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/* add ipfw rules for layer 2 */
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316
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if (!isset($config['captiveportal']['nomacfilter'])) {
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317
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$l2ruleno = $ruleno + 10000;
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318
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exec("/sbin/ipfw add $l2ruleno set 3 deny all from $clientip to any not MAC any $clientmac layer2 in");
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319
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exec("/sbin/ipfw add $l2ruleno set 3 deny all from any to $clientip not MAC $clientmac any layer2 out");
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320
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}
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321
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322
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/* encode password in Base64 just in case it contains commas */
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323
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$bpassword = base64_encode($password);
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324
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$cpdb[] = array(time(), $ruleno, $clientip, $clientmac, $username, $sessionid, $bpassword,
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325
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$attributes['session_timeout'],
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326
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$attributes['idle_timeout'],
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327
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$attributes['session_terminate_time']);
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328
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329
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if (isset($config['captiveportal']['radacct_enable']) && isset($radiusservers[0])) {
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330
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$acct_val = RADIUS_ACCOUNTING_START($ruleno,
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331
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$username,
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332
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$sessionid,
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333
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$radiusservers[0]['ipaddr'],
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334
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$radiusservers[0]['acctport'],
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335
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$radiusservers[0]['key'],
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336
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$clientip,
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337
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$clientmac);
|
|
338
|
|
|
339
|
if ($acct_val == 1)
|
|
340
|
captiveportal_logportalauth($username,$clientmac,$clientip,$type,"RADIUS ACCOUNTING FAILED");
|
|
341
|
}
|
|
342
|
|
|
343
|
|
|
344
|
}
|
|
345
|
|
|
346
|
/* rewrite information to database */
|
|
347
|
captiveportal_write_db($cpdb);
|
|
348
|
|
|
349
|
/* redirect user to desired destination */
|
|
350
|
if ($url_redirection)
|
|
351
|
$my_redirurl = $url_redirection;
|
|
352
|
else if ($config['captiveportal']['redirurl'])
|
|
353
|
$my_redirurl = $config['captiveportal']['redirurl'];
|
|
354
|
else
|
|
355
|
$my_redirurl = $redirurl;
|
|
356
|
|
|
357
|
if(isset($config['captiveportal']['logoutwin_enable'])) {
|
|
358
|
|
|
359
|
if (isset($config['captiveportal']['httpslogin']))
|
|
360
|
$logouturl = "https://{$config['captiveportal']['httpsname']}:8001/";
|
|
361
|
else
|
|
362
|
$logouturl = "http://{$config['interfaces'][$config['captiveportal']['interface']]['ipaddr']}:8000/";
|
|
363
|
|
|
364
|
echo <<<EOD
|
|
365
|
<HTML>
|
|
366
|
<HEAD><TITLE>Redirecting...</TITLE></HEAD>
|
|
367
|
<BODY>
|
|
368
|
<SPAN STYLE="font-family: Tahoma, Verdana, Arial, Helvetica, sans-serif; font-size: 11px;">
|
|
369
|
<B>Redirecting to <A HREF="{$my_redirurl}">{$my_redirurl}</A>...</B>
|
|
370
|
</SPAN>
|
|
371
|
<SCRIPT LANGUAGE="JavaScript">
|
|
372
|
<!--
|
|
373
|
LogoutWin = window.open('', 'Logout', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=256,height=64');
|
|
374
|
if (LogoutWin) {
|
|
375
|
LogoutWin.document.write('<HTML>');
|
|
376
|
LogoutWin.document.write('<HEAD><TITLE>Logout</TITLE></HEAD>') ;
|
|
377
|
LogoutWin.document.write('<BODY BGCOLOR="#435370">');
|
|
378
|
LogoutWin.document.write('<DIV ALIGN="center" STYLE="color: #ffffff; font-family: Tahoma, Verdana, Arial, Helvetica, sans-serif; font-size: 11px;">') ;
|
|
379
|
LogoutWin.document.write('<B>Click the button below to disconnect</B><P>');
|
|
380
|
LogoutWin.document.write('<FORM METHOD="POST" ACTION="{$logouturl}">');
|
|
381
|
LogoutWin.document.write('<INPUT NAME="logout_id" TYPE="hidden" VALUE="{$sessionid}">');
|
|
382
|
LogoutWin.document.write('<INPUT NAME="logout" TYPE="submit" VALUE="Logout">');
|
|
383
|
LogoutWin.document.write('</FORM>');
|
|
384
|
LogoutWin.document.write('</DIV></BODY>');
|
|
385
|
LogoutWin.document.write('</HTML>');
|
|
386
|
LogoutWin.document.close();
|
|
387
|
}
|
|
388
|
|
|
389
|
document.location.href="{$my_redirurl}";
|
|
390
|
-->
|
|
391
|
</SCRIPT>
|
|
392
|
</BODY>
|
|
393
|
</HTML>
|
|
394
|
|
|
395
|
EOD;
|
|
396
|
} else {
|
|
397
|
header("Location: " . $my_redirurl);
|
|
398
|
}
|
|
399
|
|
|
400
|
captiveportal_unlock();
|
|
401
|
return $sessionid;
|
|
402
|
}
|
|
403
|
|
|
404
|
|
|
405
|
|
|
406
|
/* remove a single client by session ID
|
|
407
|
by Dinesh Nair
|
|
408
|
*/
|
|
409
|
function disconnect_client($sessionid, $logoutReason = "LOGOUT", $term_cause = 1) {
|
|
410
|
|
|
411
|
global $g, $config;
|
|
412
|
|
|
413
|
captiveportal_lock();
|
|
414
|
/* read database */
|
|
415
|
$cpdb = captiveportal_read_db();
|
|
416
|
|
|
417
|
$radiusservers = captiveportal_get_radius_servers();
|
|
418
|
|
|
419
|
/* find entry */
|
|
420
|
for ($i = 0; $i < count($cpdb); $i++) {
|
|
421
|
if ($cpdb[$i][5] == $sessionid) {
|
|
422
|
captiveportal_disconnect($cpdb[$i],$radiusservers, $term_cause);
|
|
423
|
captiveportal_logportalauth($cpdb[$i][4],$cpdb[$i][3],$cpdb[$i][2],$logoutReason);
|
|
424
|
unset($cpdb[$i]);
|
|
425
|
break;
|
|
426
|
}
|
|
427
|
}
|
|
428
|
|
|
429
|
/* write database */
|
|
430
|
captiveportal_write_db($cpdb);
|
|
431
|
|
|
432
|
captiveportal_unlock();
|
|
433
|
}
|
|
434
|
|
|
435
|
?>
|