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#!/usr/local/bin/php
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<?php
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/*
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diag_dhcp_leases.php
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Copyright (C) 2004 Scott Ullrich
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All rights reserved.
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originially 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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require("guiconfig.inc");
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?>
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<title><?=gentitle("Diagnostics: DHCP leases");?></title>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<link href="gui.css" rel="stylesheet" type="text/css">
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</head>
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<body link="#0000CC" vlink="#0000CC" alink="#0000CC">
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<?php include("fbegin.inc"); ?>
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<p class="pgtitle">Diagnostics: DHCP leases</p>
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<?php
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flush();
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function leasecmp($a, $b) {
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return strcmp($a[$_GET['order']], $b[$_GET['order']]);
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}
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$fp = @fopen("{$g['vardb_path']}/dhcpd.leases","r");
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if ($fp):
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$return = array();
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while ($line = fgets($fp)) {
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$matches = "";
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// Sort out comments
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// C-style comments not supported!
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if (preg_match("/^\s*[\r|\n]/", $line, $matches[0]) ||
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preg_match("/^([^\"#]*)#.*$/", $line, $matches[1]) ||
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preg_match("/^([^\"]*)\/\/.*$/", $line, $matches[2]) ||
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preg_match("/\s*#(.*)/", $line, $matches[3]) ||
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preg_match("/\\\"\176/", $line, $matches[4])
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) {
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$line = "";
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continue;
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}
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if (preg_match("/(.*)#(.*)/", $line, $matches))
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$line = $matches[0];
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// Tokenize lines
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do {
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if (preg_match("/^\s*\"([^\"]*)\"(.*)$/", $line, $matches)) {
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$line = $matches[2];
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$return[] = array($matches[1], 0);
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} else if (preg_match("/^\s*([{};])(.*)$/", $line, $matches)) {
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$line = $matches[2];
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$return[] = array($matches[0], 1);
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} else if (preg_match("/^\s*([^{}; \t]+)(.*)$/", $line, $matches)) {
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$line = $matches[2];
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$return[] = array($matches[1], 0);
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} else
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break;
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} while($line);
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$lines++;
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}
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fclose($fp);
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$leases = array();
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$i = 0;
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// Put everything together again
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while ($data = array_shift($return)) {
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if ($data[0] == "next") {
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$d = array_shift($return);
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}
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if ($data[0] == "lease") {
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$d = array_shift($return);
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$leases[$i]['ip'] = $d[0];
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}
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if ($data[0] == "client-hostname") {
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$d = array_shift($return);
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$leases[$i]['hostname'] = $d[0];
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}
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if ($data[0] == "hardware") {
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$d = array_shift($return);
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if ($d[0] == "ethernet") {
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$d = array_shift($return);
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$leases[$i]['mac'] = $d[0];
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}
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} else if ($data[0] == "starts") {
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$d = array_shift($return);
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$d = array_shift($return);
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$leases[$i]['start'] = $d[0];
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$d = array_shift($return);
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$leases[$i]['start'] .= " " . $d[0];
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} else if ($data[0] == "ends") {
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$d = array_shift($return);
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$d = array_shift($return);
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$leases[$i]['end'] = $d[0];
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$d = array_shift($return);
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$leases[$i]['end'] .= " " . $d[0];
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} else if ($data[0] == "binding") {
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$d = array_shift($return);
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if ($d[0] == "state") {
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$d = array_shift($return);
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$leases[$i]['act'] = $d[0];
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}
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} else if (($data[0] == "}") && ($data[1] == 1)) // End of group
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$i++;
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}
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if ($_GET['order'])
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usort($leases, "leasecmp");
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?>
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<table width="100%" border="0" cellpadding="0" cellspacing="0">
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<tr>
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<td class="listhdrr"><a href="?all=<?=$_GET['all'];?>&order=ip">IP address</a></td>
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<td class="listhdrr"><a href="?all=<?=$_GET['all'];?>&order=mac">MAC address</a></td>
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<td class="listhdrr"><a href="?all=<?=$_GET['all'];?>&order=hostname">Hostname</a></td>
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<td class="listhdrr"><a href="?all=<?=$_GET['all'];?>&order=start">Start</a></td>
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<td class="listhdr"><a href="?all=<?=$_GET['all'];?>&order=end">End</a></td>
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</tr>
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<?php
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foreach ($leases as $data) {
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if (($data['act'] == "active") || ($_GET['all'] == 1)) {
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if ($data['act'] != "active") {
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$fspans = "<span class=\"gray\">";
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$fspane = "</span>";
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} else {
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$fspans = $fspane = "";
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}
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echo "<tr>\n";
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echo "<td class=\"listlr\">{$fspans}{$data['ip']}{$fspane} </td>\n";
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echo "<td class=\"listr\">{$fspans}{$data['mac']}{$fspane} </td>\n";
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echo "<td class=\"listr\">{$fspans}{$data['hostname']}{$fspane} </td>\n";
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echo "<td class=\"listr\">{$fspans}{$data['start']}{$fspane} </td>\n";
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echo "<td class=\"listr\">{$fspans}{$data['end']}{$fspane} </td>\n";
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echo "</tr>\n";
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}
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}
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?>
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</table>
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<p>
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<form action="diag_dhcp_leases.php" method="GET">
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<input type="hidden" name="order" value="<?=$_GET['order'];?>">
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<?php if ($_GET['all']): ?>
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<input type="hidden" name="all" value="0">
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<input type="submit" class="formbtn" value="Show active leases only">
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<?php else: ?>
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<input type="hidden" name="all" value="1">
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<input type="submit" class="formbtn" value="Show active and expired leases">
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<?php endif; ?>
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</form>
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<?php else: ?>
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<p><strong>No leases file found. Is the DHCP server active?</strong></p>
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<?php endif; ?>
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<?php include("fend.inc"); ?>
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</body>
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</html>
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