<?php
/*
	Copyright (C) 2014 Deciso B.V.
	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.
*/

$nocsrf = true;

require_once("guiconfig.inc");
require_once("openvpn.inc");

/* Handle AJAX */
if($_GET['action']) {
	if($_GET['action'] == "kill") {
		$port = $_GET['port'];
		$remipp = $_GET['remipp'];
		if (!empty($port) and !empty($remipp)) {
			$retval = kill_client($port, $remipp);
			echo htmlentities("|{$port}|{$remipp}|{$retval}|");
		} else {
			echo gettext("invalid input");
		}
		exit;
	}
}


function kill_client($port, $remipp) {
	global $g;

	//$tcpsrv = "tcp://127.0.0.1:{$port}";
	$tcpsrv = "unix://{$g['varetc_path']}/openvpn/{$port}.sock";
	$errval;
	$errstr;

	/* open a tcp connection to the management port of each server */
	$fp = @stream_socket_client($tcpsrv, $errval, $errstr, 1);
	$killed = -1;
	if ($fp) {
		stream_set_timeout($fp, 1);
		fputs($fp, "kill {$remipp}\n");
		while (!feof($fp)) {
			$line = fgets($fp, 1024);

			$info = stream_get_meta_data($fp);
			if ($info['timed_out'])
				break;

			/* parse header list line */
			if (strpos($line, "INFO:") !== false)
				continue;
			if (strpos($line, "SUCCESS") !== false) {
				$killed = 0;
			}
			break;
		}
		fclose($fp);
	}
	return $killed;
}

$servers = openvpn_get_active_servers();
$sk_servers = openvpn_get_active_servers("p2p");
$clients = openvpn_get_active_clients();
?>

<br />
<script type="text/javascript">
	function killClient(mport, remipp) {
		var busy = function(index,icon) {
			jQuery(icon).bind("onclick","");
			jQuery(icon).attr('src',jQuery(icon).attr('src').replace("\.gif", "_d.gif"));
			jQuery(icon).css("cursor","wait");
		}

		jQuery('span[name="i:' + mport + ":" + remipp + '"]').each(busy);

		jQuery.ajax(
			"<?=$_SERVER['SCRIPT_NAME'];?>" +
				"?action=kill&port=" + mport + "&remipp=" + remipp,
			{ type: "get", complete: killComplete }
		);
	}

	function killComplete(req) {
		var values = req.responseText.split("|");
		if(values[3] != "0") {
			alert('<?=gettext("An error occurred.");?>' + ' (' + values[3] + ')');
			return;
		}

		jQuery('tr[name="r:' + values[1] + ":" + values[2] + '"]').each(
			function(index,row) { jQuery(row).fadeOut(1000); }
		);
	}
</script>

<?php foreach ($servers as $server): ?>

<table class="table table-striped" style="padding-top:0px; padding-bottom:0px; padding-left:0px; padding-right:0px" width="100%" border="0" cellpadding="0" cellspacing="0">
	<tr>
		<td colspan="6" class="listtopic">
			<?=$server['name'];?> Client connections
		</td>
	</tr>
	<tr>
		<td>
			<table style="padding-top:0px; padding-bottom:0px; padding-left:0px; padding-right:0px" class="tabcont sortable" width="100%" border="0" cellpadding="0" cellspacing="0" sortableMultirow="2">
			<tr>
				<td class="listhdrr">Name/Time</td>
				<td class="listhdrr">Real/Virtual IP</td>
			</tr>
			<?php $rowIndex = 0;
			foreach ($server['conns'] as $conn):
			$evenRowClass = $rowIndex % 2 ? " listMReven" : " listMRodd";
			$rowIndex++;
			?>
			<tr name='<?php echo "r:{$server['mgmt']}:{$conn['remote_host']}"; ?>' class="<?=$evenRowClass?>">
				<td class="listMRlr">
					<?=$conn['common_name'];?>
				</td>
				<td class="listMRr">
					<?=$conn['remote_host'];?>
				</td>
				<td class='listMR' rowspan="2">
					<span class="glyphicon glyphicon-remove"
					   onclick="killClient('<?php echo $server['mgmt']; ?>', '<?php echo $conn['remote_host']; ?>');" style='cursor:pointer;'
					   name='<?php echo "i:{$server['mgmt']}:{$conn['remote_host']}"; ?>'
					   title='Kill client connection from <?php echo $conn['remote_host']; ?>' alt='' ></span>
				</td>
			</tr>
			<tr name='<?php echo "r:{$server['mgmt']}:{$conn['remote_host']}"; ?>' class="<?=$evenRowClass?>">
				<td class="listMRlr">
					<?=$conn['connect_time'];?>
				</td>
				<td class="listMRr">
					<?=$conn['virtual_addr'];?>
				</td>
			</tr>

			<?php endforeach; ?>
			<tfoot>
			<tr>
				<td colspan="6" class="list" height="12"></td>
			</tr>
			</tfoot>
		</table>
		</td>
	</tr>
</table>

<?php endforeach; ?>
<?php if (!empty($sk_servers)) { ?>
<table class="table table-striped" style="padding-top:0px; padding-bottom:0px; padding-left:0px; padding-right:0px" width="100%" border="0" cellpadding="0" cellspacing="0">
	<tr>
		<td colspan="6" class="listtopic">
			Peer to Peer Server Instance Statistics
		</td>
	</tr>
	<tr>
		<table style="padding-top:0px; padding-bottom:0px; padding-left:0px; padding-right:0px" class="tabcont sortable" width="100%" border="0" cellpadding="0" cellspacing="0">
		<tr>
			<td class="listhdrr">Name/Time</td>
			<td class="listhdrr">Remote/Virtual IP</td>
		</tr>

<?php foreach ($sk_servers as $sk_server): ?>
		<tr name='<?php echo "r:{$sk_server['port']}:{$sk_server['remote_host']}"; ?>'>
			<td class="listlr">
				<?=$sk_server['name'];?>
			</td>
			<td class="listr">
				<?=$sk_server['remote_host'];?>
			</td>
			<td rowspan="2" align="center">
			<?php
			if ($sk_server['status'] == "up") {
				/* tunnel is up */
				$iconfn = "text-success";
			} else {
				/* tunnel is down */
				$iconfn = "text-danger";
			}
			echo "<span class='glyphicon glyphicon-transfer ".$iconfn."'></span>";
			?>
			</td>
		</tr>
		<tr name='<?php echo "r:{$sk_server['port']}:{$sk_server['remote_host']}"; ?>'>
			<td class="listlr">
				<?=$sk_server['connect_time'];?>
			</td>
			<td class="listr">
				<?=$sk_server['virtual_addr'];?>
			</td>
		</tr>
<?php endforeach; ?>
		</table>
	</tr>
</table>

<?php
} ?>
<?php if (!empty($clients)) { ?>
<table class="table table-striped" style="padding-top:0px; padding-bottom:0px; padding-left:0px; padding-right:0px" width="100%" border="0" cellpadding="0" cellspacing="0">
	<tr>
		<td colspan="6" class="listtopic">
			Client Instance Statistics
		</td>
	</tr>
	<tr>
		<table class="table table-striped" style="padding-top:0px; padding-bottom:0px; padding-left:0px; padding-right:0px" class="tabcont sortable" width="100%" border="0" cellpadding="0" cellspacing="0">
		<tr>
			<td class="listhdrr">Name/Time</td>
			<td class="listhdrr">Remote/Virtual IP</td>
		</tr>

<?php foreach ($clients as $client): ?>
		<tr name='<?php echo "r:{$client['port']}:{$client['remote_host']}"; ?>'>
			<td class="listlr">
				<?=$client['name'];?>
			</td>
			<td class="listr">
				<?=$client['remote_host'];?>
			</td>
			<td rowspan="2" align="center">
			<?php
			if ($client['status'] == "up") {
				/* tunnel is up */
				$iconfn = "text-success";
			} else {
				/* tunnel is down */
				$iconfn = "text-danger";
			}
			echo "<span class='glyphicon glyphicon-transfer ".$iconfn."'></span>";
			?>
			</td>
		</tr>
		<tr name='<?php echo "r:{$client['port']}:{$client['remote_host']}"; ?>'>
			<td class="listlr">
				<?=$client['connect_time'];?>
			</td>
			<td class="listr">
				<?=$client['virtual_addr'];?>
			</td>
		</tr>
<?php endforeach; ?>
		</table>
	</tr>
</table>

<?php
}

if ($DisplayNote) {
	echo "<br /><b>NOTE:</b> You need to bind each OpenVPN client to enable its management daemon: use 'Local port' setting in the OpenVPN client screen";
}

if ((empty($clients)) && (empty($servers)) && (empty($sk_servers))) {
	echo "No OpenVPN instance defined";
}
?>
