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<?php
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/*
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captiveportal.inc
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part of m0n0wall (http://m0n0.ch/wall)
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Copyright (C) 2003-2004 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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/* include all configuration functions */
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require_once("functions.inc");
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require_once("radius_accounting.inc") ;
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function captiveportal_configure() {
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global $config, $g;
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if (isset($config['captiveportal']['enable']) &&
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(($config['captiveportal']['interface'] == "lan") ||
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isset($config['interfaces'][$config['captiveportal']['interface']]['enable']))) {
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if ($g['booting'])
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echo "Starting captive portal... ";
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/* kill any running mini_httpd */
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killbypid("{$g['varrun_path']}/mini_httpd.cp.pid");
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killbypid("{$g['varrun_path']}/mini_httpd.cps.pid");
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/* kill any running minicron */
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killbypid("{$g['varrun_path']}/minicron.pid");
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/* generate ipfw rules */
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$cprules = captiveportal_rules_generate();
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/* make sure ipfw is loaded */
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mwexec("/sbin/kldload ipfw");
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/* stop accounting on all clients */
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captiveportal_radius_stop_all() ;
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/* remove old information */
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unlink_if_exists("{$g['vardb_path']}/captiveportal.nextrule");
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unlink_if_exists("{$g['vardb_path']}/captiveportal.db");
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unlink_if_exists("{$g['vardb_path']}/captiveportal_mac.db");
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unlink_if_exists("{$g['vardb_path']}/captiveportal_ip.db");
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unlink_if_exists("{$g['vardb_path']}/captiveportal_radius.db");
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/* write portal page */
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if ($config['captiveportal']['page']['htmltext'])
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$htmltext = base64_decode($config['captiveportal']['page']['htmltext']);
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else {
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/* example/template page */
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$htmltext = <<<EOD
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<html>
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<head>
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<title>m0n0wall captive portal</title>
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</head>
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<body>
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<h2>m0n0wall captive portal</h2>
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<p>This is the default captive portal page. Please upload your own custom HTML file on the <em>Services: Captive portal</em> screen in the m0n0wall webGUI.</p>
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<form method="post" action="\$PORTAL_ACTION\$">
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<input name="accept" type="submit" value="Continue">
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<input name="redirurl" type="hidden" value="\$PORTAL_REDIRURL\$">
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</form>
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</body>
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</html>
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EOD;
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}
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$fd = @fopen("{$g['varetc_path']}/captiveportal.html", "w");
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if ($fd) {
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fwrite($fd, $htmltext);
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fclose($fd);
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}
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/* write error page */
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if ($config['captiveportal']['page']['errtext'])
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$errtext = base64_decode($config['captiveportal']['page']['errtext']);
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else {
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/* example page */
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$errtext = <<<EOD
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<html>
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<head>
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<title>Authentication error</title>
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</head>
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<body>
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<font color="#cc0000"><h2>Authentication error</h2></font>
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<b>
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Username and/or password invalid.
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<br><br>
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<a href="javascript:history.back()">Go back</a>
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</b>
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</body>
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</html>
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EOD;
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}
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$fd = @fopen("{$g['varetc_path']}/captiveportal-error.html", "w");
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if ($fd) {
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fwrite($fd, $errtext);
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fclose($fd);
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}
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/* load rules */
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mwexec("/sbin/ipfw -f delete set 1");
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mwexec("/sbin/ipfw -f delete set 2");
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mwexec("/sbin/ipfw -f delete set 3");
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/* XXX - seems like ipfw cannot accept rules directly on stdin,
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so we have to write them to a temporary file first */
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$fd = @fopen("{$g['tmp_path']}/ipfw.cp.rules", "w");
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if (!$fd) {
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printf("Cannot open ipfw.cp.rules in captiveportal_configure()\n");
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return 1;
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}
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fwrite($fd, $cprules);
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fclose($fd);
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mwexec("/sbin/ipfw {$g['tmp_path']}/ipfw.cp.rules");
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unlink("{$g['tmp_path']}/ipfw.cp.rules");
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/* filter on layer2 as well so we can check MAC addresses */
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mwexec("/sbin/sysctl net.link.ether.ipfw=1");
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chdir($g['captiveportal_path']);
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/* start web server */
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mwexec("/usr/local/sbin/mini_httpd -a -M 0 -u root -maxproc 16" .
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" -p 8000 -i {$g['varrun_path']}/mini_httpd.cp.pid");
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/* fire up another one for HTTPS if requested */
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if (isset($config['captiveportal']['httpslogin']) &&
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$config['captiveportal']['certificate'] && $config['captiveportal']['private-key']) {
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$cert = base64_decode($config['captiveportal']['certificate']);
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$key = base64_decode($config['captiveportal']['private-key']);
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$fd = fopen("{$g['varetc_path']}/cert-portal.pem", "w");
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if (!$fd) {
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printf("Error: cannot open cert-portal.pem in system_webgui_start().\n");
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return 1;
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}
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chmod("{$g['varetc_path']}/cert-portal.pem", 0600);
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fwrite($fd, $cert);
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fwrite($fd, "\n");
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fwrite($fd, $key);
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fclose($fd);
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mwexec("/usr/local/sbin/mini_httpd -S -a -M 0 -E {$g['varetc_path']}/cert-portal.pem" .
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" -u root -maxproc 16 -p 8001" .
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" -i {$g['varrun_path']}/mini_httpd.cps.pid");
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}
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/* start pruning process (interval = 60 seconds) */
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mwexec("/usr/local/bin/minicron 60 {$g['varrun_path']}/minicron.pid " .
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"/etc/rc.prunecaptiveportal");
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/* generate passthru mac database */
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captiveportal_passthrumac_configure() ;
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/* create allowed ip database and insert ipfw rules to make it so */
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captiveportal_allowedip_configure() ;
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/* generate radius server database */
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if($config['captiveportal']['radiusip']) {
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$radiusip = $config['captiveportal']['radiusip'] ;
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if($config['captiveportal']['radiusport'])
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$radiusport = $config['captiveportal']['radiusport'] ;
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else
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$radiusport = 1812;
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if($config['captiveportal']['radiusacctport'])
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$radiusacctport = $config['captiveportal']['radiusacctport'] ;
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else
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$radiusacctport = 1813;
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$radiuskey = $config['captiveportal']['radiuskey'];
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$fd = @fopen("{$g['vardb_path']}/captiveportal_radius.db", "w");
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if (!$fd) {
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printf("Error: cannot open radius DB file in captiveportal_configure().\n");
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return 1;
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} else {
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fwrite($fd,$radiusip . "," . $radiusport . "," . $radiusacctport . "," . $radiuskey) ;
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}
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fclose($fd) ;
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}
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if ($g['booting'])
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echo "done\n";
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} else {
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killbypid("{$g['varrun_path']}/mini_httpd.cp.pid");
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killbypid("{$g['varrun_path']}/minicron.pid");
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captiveportal_radius_stop_all() ;
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mwexec("/sbin/sysctl net.link.ether.ipfw=0");
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if (!isset($config['shaper']['enable'])) {
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/* unload ipfw */
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mwexec("/sbin/kldunload ipfw");
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} else {
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/* shaper is on - just remove our rules */
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mwexec("/sbin/ipfw -f delete set 1");
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mwexec("/sbin/ipfw -f delete set 2");
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mwexec("/sbin/ipfw -f delete set 3");
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}
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}
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return 0;
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}
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function captiveportal_rules_generate() {
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global $config, $g;
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$cpifn = $config['captiveportal']['interface'];
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$cpif = $config['interfaces'][$cpifn]['if'];
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$cpip = $config['interfaces'][$cpifn]['ipaddr'];
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/* note: the captive portal daemon inserts all pass rules for authenticated
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clients as skipto 50000 rules to make traffic shaping work */
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$cprules = "";
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/* captive portal on LAN interface? */
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if ($cpifn == "lan") {
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/* add anti-lockout rules */
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$cprules .= <<<EOD
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add 500 set 1 pass all from $cpip to any out via $cpif
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add 501 set 1 pass all from any to $cpip in via $cpif
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EOD;
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}
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$cprules .= <<<EOD
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# skip to traffic shaper if not on captive portal interface
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add 1000 set 1 skipto 50000 all from any to any not layer2 not via $cpif
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# pass all layer2 traffic on other interfaces
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add 1001 set 1 pass layer2 not via $cpif
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# layer 2: pass ARP
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add 1100 set 1 pass layer2 mac-type arp
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# layer 2: block anything else non-IP
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add 1101 set 1 deny layer2 not mac-type ip
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# layer 2: check if MAC addresses of authenticated clients are correct
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add 1102 set 1 skipto 20000 layer2
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# allow access to our DHCP server (which needs to be able to ping clients as well)
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add 1200 set 1 pass udp from any 68 to 255.255.255.255 67 in
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add 1201 set 1 pass udp from any 68 to $cpip 67 in
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add 1202 set 1 pass udp from $cpip 67 to any 68 out
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add 1203 set 1 pass icmp from $cpip to any out icmptype 8
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add 1204 set 1 pass icmp from any to $cpip in icmptype 0
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# allow access to our DNS forwarder
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add 1300 set 1 pass udp from any to $cpip 53 in
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add 1301 set 1 pass udp from $cpip 53 to any out
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# allow access to our web server
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add 1302 set 1 pass tcp from any to $cpip 8000 in
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add 1303 set 1 pass tcp from $cpip 8000 to any out
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EOD;
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if (isset($config['captiveportal']['httpslogin'])) {
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$cprules .= <<<EOD
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add 1304 set 1 pass tcp from any to $cpip 8001 in
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add 1305 set 1 pass tcp from $cpip 8001 to any out
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EOD;
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}
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$cprules .= <<<EOD
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# ... 10000-19899: rules per authenticated client go here...
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# redirect non-authenticated clients to captive portal
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add 19900 set 1 fwd 127.0.0.1,8000 tcp from any to any 80 in
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# let the responses from the captive portal web server back out
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add 19901 set 1 pass tcp from any 80 to any out
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# block everything else
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add 19902 set 1 deny all from any to any
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# ... 20000-29899: layer2 block rules per authenticated client go here...
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# pass everything else on layer2
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add 29900 set 1 pass all from any to any layer2
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EOD;
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return $cprules;
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}
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/* remove clients that have been around for longer than the specified amount of time */
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/* db file structure: timestamp,ipfw_rule_no,clientip,clientmac,username,sessionid */
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function captiveportal_prune_old() {
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global $g, $config;
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/* check for expired entries */
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if ($config['captiveportal']['timeout'])
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$timeout = $config['captiveportal']['timeout'] * 60;
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else
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$timeout = 0;
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328
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if ($config['captiveportal']['idletimeout'])
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$idletimeout = $config['captiveportal']['idletimeout'] * 60;
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else
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$idletimeout = 0;
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333
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if (!$timeout && !$idletimeout)
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return;
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captiveportal_lock();
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/* read database */
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$cpdb = captiveportal_read_db();
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$radiusservers = captiveportal_get_radius_servers();
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for ($i = 0; $i < count($cpdb); $i++) {
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$timedout = false;
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/* hard timeout? */
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if ($timeout) {
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if ((time() - $cpdb[$i][0]) >= $timeout)
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$timedout = true;
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}
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/* if an idle timeout is specified, get last activity timestamp from ipfw */
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if (!$timedout && $idletimeout) {
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$lastact = captiveportal_get_last_activity($cpdb[$i][1]);
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if ($lastact && ((time() - $lastact) >= $idletimeout))
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$timedout = true;
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}
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361
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if ($timedout) {
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/* this client needs to be deleted - remove ipfw rules */
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363
|
if (isset($config['captiveportal']['radacct_enable']) && isset($radiusservers[0])) {
|
|
364
|
RADIUS_ACCOUNTING_STOP($cpdb[$i][1], // ruleno
|
|
365
|
$cpdb[$i][4], // username
|
|
366
|
$cpdb[$i][5], // sessionid
|
|
367
|
$cpdb[$i][0], // start time
|
|
368
|
$radiusservers[0]['ipaddr'],
|
|
369
|
$radiusservers[0]['acctport'],
|
|
370
|
$radiusservers[0]['key']);
|
|
371
|
}
|
|
372
|
mwexec("/sbin/ipfw delete " . $cpdb[$i][1] . " " . ($cpdb[$i][1]+10000));
|
|
373
|
unset($cpdb[$i]);
|
|
374
|
}
|
|
375
|
}
|
|
376
|
|
|
377
|
/* write database */
|
|
378
|
captiveportal_write_db($cpdb);
|
|
379
|
|
|
380
|
captiveportal_unlock();
|
|
381
|
}
|
|
382
|
|
|
383
|
/* remove a single client by ipfw rule number */
|
|
384
|
function captiveportal_disconnect_client($id) {
|
|
385
|
|
|
386
|
global $g, $config;
|
|
387
|
|
|
388
|
captiveportal_lock();
|
|
389
|
|
|
390
|
/* read database */
|
|
391
|
$cpdb = captiveportal_read_db();
|
|
392
|
$radiusservers = captiveportal_get_radius_servers();
|
|
393
|
|
|
394
|
/* find entry */
|
|
395
|
for ($i = 0; $i < count($cpdb); $i++) {
|
|
396
|
if ($cpdb[$i][1] == $id) {
|
|
397
|
/* this client needs to be deleted - remove ipfw rules */
|
|
398
|
if (isset($config['captiveportal']['radacct_enable']) && isset($radiusservers[0])) {
|
|
399
|
RADIUS_ACCOUNTING_STOP($cpdb[$i][1], // ruleno
|
|
400
|
$cpdb[$i][4], // username
|
|
401
|
$cpdb[$i][5], // sessionid
|
|
402
|
$cpdb[$i][0], // start time
|
|
403
|
$radiusservers[0]['ipaddr'],
|
|
404
|
$radiusservers[0]['acctport'],
|
|
405
|
$radiusservers[0]['key']);
|
|
406
|
}
|
|
407
|
mwexec("/sbin/ipfw delete " . $cpdb[$i][1] . " " . ($cpdb[$i][1]+10000));
|
|
408
|
unset($cpdb[$i]);
|
|
409
|
break;
|
|
410
|
}
|
|
411
|
}
|
|
412
|
|
|
413
|
/* write database */
|
|
414
|
captiveportal_write_db($cpdb);
|
|
415
|
|
|
416
|
captiveportal_unlock();
|
|
417
|
}
|
|
418
|
|
|
419
|
/* send RADIUS acct stop for all current clients */
|
|
420
|
function captiveportal_radius_stop_all() {
|
|
421
|
global $g, $config;
|
|
422
|
|
|
423
|
captiveportal_lock() ;
|
|
424
|
$cpdb = captiveportal_read_db() ;
|
|
425
|
|
|
426
|
$radiusservers = captiveportal_get_radius_servers();
|
|
427
|
|
|
428
|
if (isset($radiusservers[0])) {
|
|
429
|
for ($i = 0; $i < count($cpdb); $i++) {
|
|
430
|
RADIUS_ACCOUNTING_STOP($cpdb[$i][1], // ruleno
|
|
431
|
$cpdb[$i][4], // username
|
|
432
|
$cpdb[$i][5], // sessionid
|
|
433
|
$cpdb[$i][0], // start time
|
|
434
|
$radiusservers[0]['ipaddr'],
|
|
435
|
$radiusservers[0]['acctport'],
|
|
436
|
$radiusservers[0]['key']);
|
|
437
|
}
|
|
438
|
}
|
|
439
|
captiveportal_unlock() ;
|
|
440
|
}
|
|
441
|
|
|
442
|
function captiveportal_passthrumac_configure() {
|
|
443
|
global $config, $g;
|
|
444
|
|
|
445
|
/* clear out passthru macs, if necessary */
|
|
446
|
if (file_exists("{$g['vardb_path']}/captiveportal_mac.db")) {
|
|
447
|
unlink("{$g['vardb_path']}/captiveportal_mac.db");
|
|
448
|
}
|
|
449
|
|
|
450
|
if (is_array($config['captiveportal']['passthrumac'])) {
|
|
451
|
|
|
452
|
$fd = @fopen("{$g['vardb_path']}/captiveportal_mac.db", "w");
|
|
453
|
if (!$fd) {
|
|
454
|
printf("Error: cannot open passthru mac DB file in captiveportal_passthrumac_configure().\n");
|
|
455
|
return 1;
|
|
456
|
}
|
|
457
|
|
|
458
|
foreach ($config['captiveportal']['passthrumac'] as $macent) {
|
|
459
|
/* record passthru mac so it can be recognized and let thru */
|
|
460
|
fwrite($fd, $macent['mac'] . "\n");
|
|
461
|
}
|
|
462
|
|
|
463
|
fclose($fd);
|
|
464
|
}
|
|
465
|
|
|
466
|
return 0;
|
|
467
|
}
|
|
468
|
|
|
469
|
function captiveportal_allowedip_configure() {
|
|
470
|
global $config, $g;
|
|
471
|
|
|
472
|
captiveportal_lock() ;
|
|
473
|
|
|
474
|
/* clear out existing allowed ips, if necessary */
|
|
475
|
if (file_exists("{$g['vardb_path']}/captiveportal_ip.db")) {
|
|
476
|
$fd = @fopen("{$g['vardb_path']}/captiveportal_ip.db", "r");
|
|
477
|
if ($fd) {
|
|
478
|
while (!feof($fd)) {
|
|
479
|
$line = trim(fgets($fd));
|
|
480
|
if($line) {
|
|
481
|
list($ip,$rule) = explode(",",$line);
|
|
482
|
mwexec("/sbin/ipfw delete $rule") ;
|
|
483
|
}
|
|
484
|
}
|
|
485
|
}
|
|
486
|
fclose($fd) ;
|
|
487
|
unlink("{$g['vardb_path']}/captiveportal_ip.db");
|
|
488
|
}
|
|
489
|
|
|
490
|
/* get next ipfw rule number */
|
|
491
|
if (file_exists("{$g['vardb_path']}/captiveportal.nextrule"))
|
|
492
|
$ruleno = trim(file_get_contents("{$g['vardb_path']}/captiveportal.nextrule"));
|
|
493
|
if (!$ruleno)
|
|
494
|
$ruleno = 10000; /* first rule number */
|
|
495
|
|
|
496
|
if (is_array($config['captiveportal']['allowedip'])) {
|
|
497
|
|
|
498
|
$fd = @fopen("{$g['vardb_path']}/captiveportal_ip.db", "w");
|
|
499
|
if (!$fd) {
|
|
500
|
printf("Error: cannot open allowed ip DB file in captiveportal_allowedip_configure().\n");
|
|
501
|
captiveportal_unlock() ;
|
|
502
|
return 1;
|
|
503
|
}
|
|
504
|
|
|
505
|
foreach ($config['captiveportal']['allowedip'] as $ipent) {
|
|
506
|
/* record allowed ip so it can be recognized and removed later */
|
|
507
|
fwrite($fd, $ipent['ip'] . "," . $ruleno ."\n");
|
|
508
|
/* insert ipfw rule to allow ip thru */
|
|
509
|
if($ipent['dir'] == "from") {
|
|
510
|
mwexec("/sbin/ipfw add $ruleno set 2 skipto 50000 ip from ".$ipent['ip']." to any in") ;
|
|
511
|
mwexec("/sbin/ipfw add $ruleno set 2 skipto 50000 ip from any to ".$ipent['ip']." out") ;
|
|
512
|
} else {
|
|
513
|
mwexec("/sbin/ipfw add $ruleno set 2 skipto 50000 ip from any to ".$ipent['ip']." in") ;
|
|
514
|
mwexec("/sbin/ipfw add $ruleno set 2 skipto 50000 ip from ".$ipent['ip']." to any out") ;
|
|
515
|
}
|
|
516
|
$ruleno++ ;
|
|
517
|
if ($ruleno > 19899)
|
|
518
|
$ruleno = 10000;
|
|
519
|
}
|
|
520
|
|
|
521
|
fclose($fd);
|
|
522
|
|
|
523
|
/* write next rule number */
|
|
524
|
$fd = @fopen("{$g['vardb_path']}/captiveportal.nextrule", "w");
|
|
525
|
if ($fd) {
|
|
526
|
fwrite($fd, $ruleno);
|
|
527
|
fclose($fd);
|
|
528
|
}
|
|
529
|
}
|
|
530
|
|
|
531
|
captiveportal_unlock() ;
|
|
532
|
return 0;
|
|
533
|
}
|
|
534
|
|
|
535
|
/* get last activity timestamp given ipfw rule number */
|
|
536
|
function captiveportal_get_last_activity($ruleno) {
|
|
537
|
|
|
538
|
exec("/sbin/ipfw -T list {$ruleno} 2>/dev/null", $ipfwoutput);
|
|
539
|
|
|
540
|
/* in */
|
|
541
|
if ($ipfwoutput[0]) {
|
|
542
|
$ri = explode(" ", $ipfwoutput[0]);
|
|
543
|
if ($ri[1])
|
|
544
|
return $ri[1];
|
|
545
|
}
|
|
546
|
|
|
547
|
return 0;
|
|
548
|
}
|
|
549
|
|
|
550
|
/* read captive portal DB into array */
|
|
551
|
function captiveportal_read_db() {
|
|
552
|
|
|
553
|
global $g;
|
|
554
|
|
|
555
|
$cpdb = array();
|
|
556
|
$fd = @fopen("{$g['vardb_path']}/captiveportal.db", "r");
|
|
557
|
if ($fd) {
|
|
558
|
while (!feof($fd)) {
|
|
559
|
$line = trim(fgets($fd));
|
|
560
|
if ($line) {
|
|
561
|
$cpdb[] = explode(",", $line);
|
|
562
|
}
|
|
563
|
}
|
|
564
|
fclose($fd);
|
|
565
|
}
|
|
566
|
return $cpdb;
|
|
567
|
}
|
|
568
|
|
|
569
|
/* write captive portal DB */
|
|
570
|
function captiveportal_write_db($cpdb) {
|
|
571
|
|
|
572
|
global $g;
|
|
573
|
|
|
574
|
$fd = @fopen("{$g['vardb_path']}/captiveportal.db", "w");
|
|
575
|
if ($fd) {
|
|
576
|
foreach ($cpdb as $cpent) {
|
|
577
|
fwrite($fd, join(",", $cpent) . "\n");
|
|
578
|
}
|
|
579
|
fclose($fd);
|
|
580
|
}
|
|
581
|
}
|
|
582
|
|
|
583
|
/* read RADIUS servers into array */
|
|
584
|
function captiveportal_get_radius_servers() {
|
|
585
|
|
|
586
|
global $g;
|
|
587
|
|
|
588
|
if (file_exists("{$g['vardb_path']}/captiveportal_radius.db")) {
|
|
589
|
$fd = @fopen("{$g['vardb_path']}/captiveportal_radius.db","r");
|
|
590
|
if ($fd) {
|
|
591
|
$radiusservers = array();
|
|
592
|
while (!feof($fd)) {
|
|
593
|
$line = trim(fgets($fd));
|
|
594
|
if ($line) {
|
|
595
|
$radsrv = array();
|
|
596
|
list($radsrv['ipaddr'],$radsrv['port'],$radsrv['acctport'],$radsrv['key']) = explode(",",$line);
|
|
597
|
$radiusservers[] = $radsrv;
|
|
598
|
}
|
|
599
|
}
|
|
600
|
fclose($fd);
|
|
601
|
|
|
602
|
return $radiusservers;
|
|
603
|
}
|
|
604
|
}
|
|
605
|
|
|
606
|
return false;
|
|
607
|
}
|
|
608
|
|
|
609
|
/* lock captive portal information, decide that the lock file is stale after
|
|
610
|
10 seconds */
|
|
611
|
function captiveportal_lock() {
|
|
612
|
|
|
613
|
global $g;
|
|
614
|
|
|
615
|
$lockfile = "{$g['varrun_path']}/captiveportal.lock";
|
|
616
|
|
|
617
|
$n = 0;
|
|
618
|
while ($n < 10) {
|
|
619
|
/* open the lock file in append mode to avoid race condition */
|
|
620
|
if ($fd = @fopen($lockfile, "x")) {
|
|
621
|
/* succeeded */
|
|
622
|
fclose($fd);
|
|
623
|
return;
|
|
624
|
} else {
|
|
625
|
/* file locked, wait and try again */
|
|
626
|
sleep(1);
|
|
627
|
$n++;
|
|
628
|
}
|
|
629
|
}
|
|
630
|
}
|
|
631
|
|
|
632
|
/* unlock configuration file */
|
|
633
|
function captiveportal_unlock() {
|
|
634
|
|
|
635
|
global $g;
|
|
636
|
|
|
637
|
$lockfile = "{$g['varrun_path']}/captiveportal.lock";
|
|
638
|
|
|
639
|
if (file_exists($lockfile))
|
|
640
|
unlink($lockfile);
|
|
641
|
}
|
|
642
|
|
|
643
|
?>
|