<?php
/*
	Copyright (C) 2014-2015 Deciso B.V.
	Copyright (C) 2004-2009 Scott Ullrich
	Copyright (C) 2011 Seth Mos
	Copyright (C) 2003-2004 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("guiconfig.inc");
require_once("pfsense-utils.inc");
require_once("interfaces.inc");
require_once("services.inc");

$pgtitle = array(gettext("Status"),gettext("DHCPv6 leases"));
$shortcut_section = "dhcp6";

$leasesfile = "{$g['dhcpd_chroot_path']}/var/db/dhcpd6.leases";

if (($_GET['deleteip']) && (is_ipaddr($_GET['deleteip']))) {
	/* Stop DHCPD */
	killbyname("dhcpd");

	/* Read existing leases */
	$leases_contents = explode("\n", file_get_contents($leasesfile));
	$newleases_contents = array();
	$i=0;
	while ($i < count($leases_contents)) {
		/* Find the lease(s) we want to delete */
		if ($leases_contents[$i] == "  iaaddr {$_GET['deleteip']} {") {
			/* The iaaddr line is two lines down from the start of the lease, so remove those two lines. */
			array_pop($newleases_contents);
			array_pop($newleases_contents);
			/* Skip to the end of the lease declaration */
			do {
				$i++;
			} while ($leases_contents[$i] != "}");
		} else {
			/* It's a line we want to keep, copy it over. */
			$newleases_contents[] = $leases_contents[$i];
		}
		$i++;
	}

	/* Write out the new leases file */
	$fd = fopen($leasesfile, 'w');
	fwrite($fd, implode("\n", $newleases_contents));
	fclose($fd);

	/* Restart DHCP Service */
	services_dhcpd_configure();
	header("Location: status_dhcpv6_leases.php?all={$_GET['all']}");
}

// Load MAC-Manufacturer table
$mac_man = load_mac_manufacturer_table();

include("head.inc");

?>

<body>
<?php include("fbegin.inc"); ?>

<section class="page-content-main">
	<div class="container-fluid">
		<div class="row">


<?php

function leasecmp($a, $b) {
	return strcmp($a[$_GET['order']], $b[$_GET['order']]);
}

function adjust_gmt($dt) {
	global $config;

	$dhcpv6leaseinlocaltime == "no";
	if (is_array($config['dhcpdv6'])) {
		$dhcpdv6 = $config['dhcpdv6'];
		foreach ($dhcpdv6 as $dhcpv6leaseinlocaltime) {
			$dhcpv6leaseinlocaltime = $dhcpv6leaseinlocaltime['dhcpv6leaseinlocaltime'];
			if ($dhcpv6leaseinlocaltime == "yes")
				break;
		}
	}

	$timezone = $config['system']['timezone'];
	$ts = strtotime($dt . " GMT");
	if ($dhcpv6leaseinlocaltime == "yes") {
		$this_tz = new DateTimeZone($timezone);
		$dhcp_lt = new DateTime(strftime("%I:%M:%S%p", $ts), $this_tz);
		$offset = $this_tz->getOffset($dhcp_lt);
		$ts = $ts + $offset;
		return strftime("%Y/%m/%d %I:%M:%S%p", $ts);
	}
	else
		return strftime("%Y/%m/%d %H:%M:%S", $ts);
}

function remove_duplicate($array, $field) {
	foreach ($array as $sub)
		$cmp[] = $sub[$field];
	$unique = array_unique(array_reverse($cmp,true));
	foreach ($unique as $k => $rien)
		$new[] = $array[$k];
	return $new;
}

function parse_duid($duid_string) {
	$parsed_duid = array();
	for ($i=0; $i < strlen($duid_string); $i++) {
		$s = substr($duid_string, $i, 1);
		if ($s == '\\') {
			$n = substr($duid_string, $i+1, 1);
			if (($n == '\\') || ($n == '"')) {
				$parsed_duid[] = sprintf("%02x", ord($n));
			} elseif (is_numeric($n)) {
				$parsed_duid[] = sprintf("%02x", octdec(substr($duid_string, $i+1, 3)));
				$i += 3;
			}
		} else {
			$parsed_duid[] = sprintf("%02x", ord($s));
		}
	}
	$iaid = array_slice($parsed_duid, 0, 4);
	$duid = array_slice($parsed_duid, 4);
	return array($iaid, $duid);
}

$awk = "/usr/bin/awk";

/* this pattern sticks comments into a single array item */
$cleanpattern = "'{ gsub(\"^#.*\", \"\");} { gsub(\"^server-duid.*\", \"\");} { gsub(\";$\", \"\"); print;}'";
/* We then split the leases file by } */
$splitpattern = "'BEGIN { RS=\"}\";} {for (i=1; i<=NF; i++) printf \"%s \", \$i; printf \"}\\n\";}'";

/* stuff the leases file in a proper format into a array by line */
exec("/bin/cat {$leasesfile} | {$awk} {$cleanpattern} | {$awk} {$splitpattern} | /usr/bin/grep '^ia-.. '", $leases_content);
$leases_count = count($leases_content);
exec("/usr/sbin/ndp -an", $rawdata);
$ndpdata = array();
foreach ($rawdata as $line) {
	$elements = preg_split('/\s+/ ',$line);
	if ($elements[1] != "(incomplete)") {
		$ndpent = array();
		$ip = trim(str_replace(array('(',')'),'',$elements[0]));
		$ndpent['mac'] = trim($elements[1]);
		$ndpent['interface'] = trim($elements[2]);
		$ndpdata[$ip] = $ndpent;
	}
}

$pools = array();
$leases = array();
$prefixes = array();
$mappings = array();
$i = 0;
$l = 0;
$p = 0;

// Put everything together again
while($i < $leases_count) {
	$entry = array();
	/* split the line by space */
	$duid_split = array();
	preg_match('/ia-.. "(.*)" { (.*)/ ', $leases_content[$i], $duid_split);
	if (!empty($duid_split[1])) {
		$iaid_duid = parse_duid($duid_split[1]);
		$entry['iaid'] = hexdec(implode("", array_reverse($iaid_duid[0])));
		$entry['duid'] = implode(":", $iaid_duid[1]);
		$data = explode(" ", $duid_split[2]);
	} else {
		$data = explode(" ", $leases_content[$i]);
	}
	/* walk the fields */
	$f = 0;
	$fcount = count($data);
	/* with less then 12 fields there is nothing useful */
	if($fcount < 12) {
		$i++;
		continue;
	}
	while($f < $fcount) {
		switch($data[$f]) {
			case "failover":
				$pools[$p]['name'] = $data[$f+2];
				$pools[$p]['mystate'] = $data[$f+7];
				$pools[$p]['peerstate'] = $data[$f+14];
				$pools[$p]['mydate'] = $data[$f+10];
				$pools[$p]['mydate'] .= " " . $data[$f+11];
				$pools[$p]['peerdate'] = $data[$f+17];
				$pools[$p]['peerdate'] .= " " . $data[$f+18];
				$p++;
				$i++;
				continue 3;
			case "ia-pd":
				$is_prefix = true;
			case "ia-na":
				$entry['iaid'] = $tmp_iaid;
				$entry['duid'] = $tmp_duid;
				if ($data[$f+1][0] == '"') {
					$duid = "";
					/* FIXME: This needs a safety belt to prevent an infinite loop */
					while ($data[$f][strlen($data[$f])-1] != '"') {
						$duid .= " " . $data[$f+1];
						$f++;
					}
					$entry['duid'] = $duid;
				} else {
					$entry['duid'] = $data[$f+1];
				}
				$entry['type'] = "dynamic";
				$f = $f+2;
				break;
			case "iaaddr":
				$entry['ip'] = $data[$f+1];
				$entry['type'] = "dynamic";
				if (in_array($entry['ip'], array_keys($ndpdata))) {
					$entry['online'] = 'online';
				} else {
					$entry['online'] = 'offline';
				}
				$f = $f+2;
				break;
			case "iaprefix":
				$is_prefix = true;
				$entry['prefix'] = $data[$f+1];
				$entry['type'] = "dynamic";
				$f = $f+2;
				break;
			case "starts":
				$entry['start'] = $data[$f+2];
				$entry['start'] .= " " . $data[$f+3];
				$f = $f+3;
				break;
			case "ends":
				$entry['end'] = $data[$f+2];
				$entry['end'] .= " " . $data[$f+3];
				$f = $f+3;
				break;
			case "tstp":
				$f = $f+3;
				break;
			case "tsfp":
				$f = $f+3;
				break;
			case "atsfp":
				$f = $f+3;
				break;
			case "cltt":
				$entry['start'] = $data[$f+2];
				$entry['start'] .= " " . $data[$f+3];
				$f = $f+3;
				break;
			case "binding":
				switch($data[$f+2]) {
					case "active":
						$entry['act'] = "active";
						break;
					case "free":
						$entry['act'] = "expired";
						$entry['online'] = "offline";
						break;
					case "backup":
						$entry['act'] = "reserved";
						$entry['online'] = "offline";
						break;
					case "released":
						$entry['act'] = "released";
						$entry['online'] = "offline";
				}
				$f = $f+1;
				break;
			case "next":
				/* skip the next binding statement */
				$f = $f+3;
				break;
			case "hardware":
				$f = $f+2;
				break;
			case "client-hostname":
				if($data[$f+1] <> "") {
					$entry['hostname'] = preg_replace('/"/','',$data[$f+1]);
				} else {
					$hostname = gethostbyaddr($entry['ip']);
					if($hostname <> "") {
						$entry['hostname'] = $hostname;
					}
				}
				$f = $f+1;
				break;
			case "uid":
				$f = $f+1;
				break;
		}
		$f++;
	}
	if ($is_prefix) {
		$prefixes[] = $entry;
	} else {
		$leases[] = $entry;
		$mappings[$entry['iaid'] . $entry['duid']] = $entry['ip'];
	}
	$l++;
	$i++;
	$is_prefix = false;
}

if(count($leases) > 0) {
	$leases = remove_duplicate($leases,"ip");
}

if(count($prefixes) > 0) {
	$prefixes = remove_duplicate($prefixes,"prefix");
}

if(count($pools) > 0) {
	$pools = remove_duplicate($pools,"name");
	asort($pools);
}

foreach($config['interfaces'] as $ifname => $ifarr) {
	if (isset($config['dhcpdv6'][$ifname]['staticmap'])) {
		foreach($config['dhcpdv6'][$ifname]['staticmap'] as $static) {
			$slease = array();
			$slease['ip'] = $static['ipaddrv6'];
			$slease['type'] = "static";
			$slease['duid'] = $static['duid'];
			$slease['start'] = "";
			$slease['end'] = "";
			$slease['hostname'] = htmlentities($static['hostname']);
			$slease['act'] = "static";
			if (in_array($slease['ip'], array_keys($ndpdata))) {
				$slease['online'] = 'online';
			} else {
				$slease['online'] = 'offline';
			}

			$leases[] = $slease;
		}
	}
}

if ($_GET['order'])
	usort($leases, "leasecmp");





/* only print pool status when we have one */
if(count($pools) > 0) {
?>

			<section class="col-xs-12">
				<div class="content-box">
			        <div class="table-responsive">
			            <table class="table table-striped table-sort sortable __nomb">
							<tr>
								<td class="listhdrr"><?=gettext("Failover Group"); ?></a></td>
								<td class="listhdrr"><?=gettext("My State"); ?></a></td>
								<td class="listhdrr"><?=gettext("Since"); ?></a></td>
								<td class="listhdrr"><?=gettext("Peer State"); ?></a></td>
								<td class="listhdrr"><?=gettext("Since"); ?></a></td>
							</tr>
							<?php
							foreach ($pools as $data) {
								echo "<tr>\n";
								echo "<td class=\"listlr\">{$fspans}{$data['name']}{$fspane}</td>\n";
								echo "<td class=\"listr\">{$fspans}{$data['mystate']}{$fspane}</td>\n";
								echo "<td class=\"listr\">{$fspans}" . adjust_gmt($data['mydate']) . "{$fspane}</td>\n";
								echo "<td class=\"listr\">{$fspans}{$data['peerstate']}{$fspane}</td>\n";
								echo "<td class=\"listr\">{$fspans}" . adjust_gmt($data['peerdate']) . "{$fspane}</td>\n";
								echo "<td class=\"list\" valign=\"middle\" width=\"17\">&nbsp;</td>\n";
								echo "<td class=\"list\" valign=\"middle\" width=\"17\">&nbsp;</td>\n";
								echo "</tr>\n";
							}

							?>
						</table>
					</div>
				</div>
			</section>

<?php
/* only print pool status when we have one */
}
?>

			<section class="col-xs-12">
				<div class="content-box">
			        <div class="table-responsive">
			            <table class="table table-striped table-sort sortable __nomb">
							<tr>
							    <td class="listhdrr"><?=gettext("IPv6 address"); ?></td>
							    <td class="listhdrr"><?=gettext("IAID"); ?></td>
							    <td class="listhdrr"><?=gettext("DUID"); ?></td>
							    <td class="listhdrr"><?=gettext("Hostname/MAC"); ?></td>
							    <td class="listhdrr"><?=gettext("Start"); ?></td>
							    <td class="listhdrr"><?=gettext("End"); ?></td>
							    <td class="listhdrr"><?=gettext("Online"); ?></td>
							    <td class="listhdrr"><?=gettext("Lease Type"); ?></td>
							</tr>
							<?php
							foreach ($leases as $data) {
								if (($data['act'] == "active") || ($data['act'] == "static") || ($_GET['all'] == 1)) {
									if ($data['act'] != "active" && $data['act'] != "static") {
										$fspans = "<span class=\"gray\">";
										$fspane = "&nbsp;</span>";
									} else {
										$fspans = "";
										$fspane = "&nbsp;";
									}

									if ($data['act'] == "static") {
										foreach ($config['dhcpdv6'] as $dhcpif => $dhcpifconf) {
											if(is_array($dhcpifconf['staticmap'])) {
												foreach ($dhcpifconf['staticmap'] as $staticent) {
													if ($data['ip'] == $staticent['ipaddr']) {
														$data['if'] = $dhcpif;
														break;
													}
												}
											}
											/* exit as soon as we have an interface */
											if ($data['if'] != "")
												break;
										}
									} else {
										$data['if'] = convert_real_interface_to_friendly_interface_name(guess_interface_from_ip($data['ip']));
									}
									echo "<tr>\n";
									echo "<td class=\"listlr\">{$fspans}{$data['ip']}{$fspane}</td>\n";
									echo "<td class=\"listr\">{$fspans}{$data['iaid']}{$fspane}</td>\n";
									echo "<td class=\"listr\">{$fspans}{$data['duid']}{$fspane}</td>\n";
									echo "<td class=\"listr\">{$fspans}";
									if (!empty($data['hostname'])) {
										echo htmlentities($data['hostname']) . "<br />";
									}

									$mac=trim($ndpdata[$data['ip']]['mac']);
									if (!empty($mac)) {
										$mac_hi = strtoupper($mac[0] . $mac[1] . $mac[3] . $mac[4] . $mac[6] . $mac[7]);
										print htmlentities($mac);
										if(isset($mac_man[$mac_hi])){ print "<br /><font size=\"-2\"><i>{$mac_man[$mac_hi]}</i></font>"; }
									}

									echo "{$fspane}&nbsp;</td>\n";
									if ($data['type'] != "static") {
										echo "<td class=\"listr\">{$fspans}" . adjust_gmt($data['start']) . "{$fspane}</td>\n";
										echo "<td class=\"listr\">{$fspans}" . adjust_gmt($data['end']) . "{$fspane}</td>\n";
									} else {
										echo "<td class=\"listr\">{$fspans} n/a {$fspane}</td>\n";
										echo "<td class=\"listr\">{$fspans} n/a {$fspane}</td>\n";
									}
									echo "<td class=\"listr\">{$fspans}{$data['online']}{$fspane}</td>\n";
									echo "<td class=\"listr\">{$fspans}{$data['act']}{$fspane}</td>\n";

									if ($data['type'] == "dynamic") {
										echo "<td valign=\"middle\" style=\"padding-left: 0px;\"><a href=\"services_dhcpv6_edit.php?if={$data['if']}&amp;duid={$data['duid']}&amp;hostname={$data['hostname']}\" class=\"btn btn-default btn-xs\">";
										echo "<span class=\"glyphicon glyphicon-plus\"></span></a><br />\n";
									} else {
										echo "<td class=\"list\" valign=\"middle\" style=\"padding-left: 0px;\">";
										echo "<span class=\"glyphicon glyphicon-plus\"></span>\n";
									}

									/* Only show the button for offline dynamic leases */
									if (($data['type'] == "dynamic") && ($data['online'] != "online")) {
										echo "<a href=\"status_dhcpv6_leases.php?deleteip={$data['ip']}&amp;all=" . htmlspecialchars($_GET['all']) . "\" class=\"btn btn-default btn-xs\">";
										echo "<span class=\"glyphicon glyphicon-remove\"></span></a></td>\n";
									}
									echo "</tr>\n";
								}
							}
							?>
						</table>
					</div>
				</div>
			</section>


			<section class="col-xs-12">
				<div class="content-box">

					<header class="content-box-head container-fluid">
				   <h3>Delegated Prefixes</h3>
				</header>

				    <div class="table-responsive">
			            <table class="table table-striped table-sort sortable __nomb">
							<tr>
								<td class="listhdrr"><?=gettext("IPv6 Prefix"); ?></td>
								<td class="listhdrr"><?=gettext("IAID"); ?></td>
								<td class="listhdrr"><?=gettext("DUID"); ?></td>
								<td class="listhdrr"><?=gettext("Start"); ?></td>
								<td class="listhdrr"><?=gettext("End"); ?></td>
								<td class="listhdrr"><?=gettext("State"); ?></td>
							</tr>
							<?php
							foreach ($prefixes as $data) {
								if (($data['act'] == "active") || ($data['act'] == "static") || ($_GET['all'] == 1)) {
									if ($data['act'] != "active" && $data['act'] != "static") {
										$fspans = "<span class=\"gray\">";
										$fspane = "&nbsp;</span>";
									} else {
										$fspans = "";
										$fspane = "&nbsp;";
									}

									if ($data['act'] == "static") {
										foreach ($config['dhcpdv6'] as $dhcpif => $dhcpifconf) {
											if(is_array($dhcpifconf['staticmap'])) {
												foreach ($dhcpifconf['staticmap'] as $staticent) {
													if ($data['ip'] == $staticent['ipaddr']) {
														$data['if'] = $dhcpif;
														break;
													}
												}
											}
											/* exit as soon as we have an interface */
											if ($data['if'] != "")
												break;
										}
									} else {
										$data['if'] = convert_real_interface_to_friendly_interface_name(guess_interface_from_ip($data['ip']));
									}
									echo "<tr>\n";
									if ($mappings[$data['iaid'] . $data['duid']]) {
										$dip = "<br />Routed To: {$mappings[$data['iaid'] . $data['duid']]}";
									}
									echo "<td class=\"listlr\">{$fspans}{$data['prefix']}{$dip}{$fspane}</td>\n";
									echo "<td class=\"listr\">{$fspans}{$data['iaid']}{$fspane}</td>\n";
									echo "<td class=\"listr\">{$fspans}{$data['duid']}{$fspane}</td>\n";
									if ($data['type'] != "static") {
										echo "<td class=\"listr\">{$fspans}" . adjust_gmt($data['start']) . "{$fspane}</td>\n";
										echo "<td class=\"listr\">{$fspans}" . adjust_gmt($data['end']) . "{$fspane}</td>\n";
									} else {
										echo "<td class=\"listr\">{$fspans} n/a {$fspane}</td>\n";
										echo "<td class=\"listr\">{$fspans} n/a {$fspane}</td>\n";
									}
									echo "<td class=\"listr\">{$fspans}{$data['act']}{$fspane}</td>\n";
									echo "</tr>\n";
								}
							}
							?>
						</table>
					</div>
				</div>
			</section>

			<section class="col-xs-12">

					<form action="status_dhcpv6_leases.php" method="get">
					<input type="hidden" name="order" value="<?=htmlspecialchars($_GET['order']);?>" />
					<?php if ($_GET['all']): ?>
					<input type="hidden" name="all" value="0" />
					<input type="submit" class="btn btn-default" value="<?=gettext("Show active and static leases only"); ?>" />
					<?php else: ?>
					<input type="hidden" name="all" value="1" />
					<input type="submit" class="btn btn-default" value="<?=gettext("Show all configured leases"); ?>" />
					<?php endif; ?>
					</form>
					<?php if($leases == 0): ?>
					<p><strong><?=gettext("No leases file found. Is the DHCP server active"); ?>?</strong></p>
					<?php endif; ?>

			</section>
		</div>
	</div>
</section>

<?php include("foot.inc"); ?>
