<?php
/*
	services_ntpd.php

	Copyright (C) 2013	Dagorlad
	Copyright (C) 2012	Jim Pingle
	Copyright (C) 2013-2015 Electric Sheep Fencing, LP
	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.
*/
/*
	pfSense_MODULE: ntpd
*/

##|+PRIV
##|*IDENT=page-services-ntpd
##|*NAME=Services: NTP
##|*DESCR=Allow access to the 'Services: NTP' page.
##|*MATCH=services_ntpd.php*
##|-PRIV

define(NUMTIMESERVERS, 10);		// The maximum number of configurable time servers
require("guiconfig.inc");
require_once('rrd.inc');
require_once("shaper.inc");

if (!is_array($config['ntpd'])) {
	$config['ntpd'] = array();
}

if (empty($config['ntpd']['interface'])) {
	if (is_array($config['installedpackages']['openntpd']) && is_array($config['installedpackages']['openntpd']['config']) &&
		is_array($config['installedpackages']['openntpd']['config'][0]) && !empty($config['installedpackages']['openntpd']['config'][0]['interface'])) {
		$pconfig['interface'] = explode(",", $config['installedpackages']['openntpd']['config'][0]['interface']);
		unset($config['installedpackages']['openntpd']);
		write_config("Upgraded settings from openttpd");
	} else {
		$pconfig['interface'] = array();
	}
} else {
	$pconfig['interface'] = explode(",", $config['ntpd']['interface']);
}

if($_GET['addrow'])
	$maxrows = $_GET['addrow'] + 1;
else
	$maxrows = 3;

if ($_POST) {
	unset($input_errors);
	$pconfig = $_POST;

	if (!$input_errors) {
		if (is_array($_POST['interface'])) {
			$config['ntpd']['interface'] = implode(",", $_POST['interface']);
		} elseif (isset($config['ntpd']['interface'])) {
			unset($config['ntpd']['interface']);
		}

		if (!empty($_POST['gpsport']) && file_exists('/dev/'.$_POST['gpsport'])) {
			$config['ntpd']['gpsport'] = $_POST['gpsport'];
		} elseif (isset($config['ntpd']['gpsport'])) {
			unset($config['ntpd']['gpsport']);
		}

		unset($config['ntpd']['prefer']);
		unset($config['ntpd']['noselect']);
		$timeservers = '';

		for ($i = 0; $i < 10; $i++) {
			$tserver = trim($_POST["server{$i}"]);
			if (!empty($tserver)) {
				$timeservers .= "{$tserver} ";
				if (!empty($_POST["servprefer{$i}"])) {
					$config['ntpd']['prefer'] .= "{$tserver} ";
				}
				if (!empty($_POST["servselect{$i}"])) {
					$config['ntpd']['noselect'] .= "{$tserver} ";
				}
			}
		}
		if (trim($timeservers) == "") {
			$timeservers = "pool.ntp.org";
		}
		$config['system']['timeservers'] = trim($timeservers);

		if (!empty($_POST['ntporphan']) && ($_POST['ntporphan'] < 17) && ($_POST['ntporphan'] != '12')) {
			$config['ntpd']['orphan'] = $_POST['ntporphan'];
		} elseif (isset($config['ntpd']['orphan'])) {
			unset($config['ntpd']['orphan']);
		}

		if (!empty($_POST['logpeer'])) {
			$config['ntpd']['logpeer'] = $_POST['logpeer'];
		} elseif (isset($config['ntpd']['logpeer'])) {
			unset($config['ntpd']['logpeer']);
		}

		if (!empty($_POST['logsys'])) {
			$config['ntpd']['logsys'] = $_POST['logsys'];
		} elseif (isset($config['ntpd']['logsys'])) {
			unset($config['ntpd']['logsys']);
		}

		if (!empty($_POST['clockstats'])) {
			$config['ntpd']['clockstats'] = $_POST['clockstats'];
		} elseif (isset($config['ntpd']['clockstats'])) {
			unset($config['ntpd']['clockstats']);
		}

		if (!empty($_POST['loopstats'])) {
			$config['ntpd']['loopstats'] = $_POST['loopstats'];
		} elseif (isset($config['ntpd']['loopstats'])) {
			unset($config['ntpd']['loopstats']);
		}

		if (!empty($_POST['peerstats'])) {
			$config['ntpd']['peerstats'] = $_POST['peerstats'];
		} elseif (isset($config['ntpd']['peerstats'])) {
			unset($config['ntpd']['peerstats']);
		}

		if (empty($_POST['kod'])) {
			$config['ntpd']['kod'] = 'on';
		} elseif (isset($config['ntpd']['kod'])) {
			unset($config['ntpd']['kod']);
		}

		if (empty($_POST['nomodify'])) {
			$config['ntpd']['nomodify'] = 'on';
		} elseif (isset($config['ntpd']['nomodify'])) {
			unset($config['ntpd']['nomodify']);
		}

		if (!empty($_POST['noquery'])) {
			$config['ntpd']['noquery'] = $_POST['noquery'];
		} elseif (isset($config['ntpd']['noquery'])) {
			unset($config['ntpd']['noquery']);
		}

		if (!empty($_POST['noserve'])) {
			$config['ntpd']['noserve'] = $_POST['noserve'];
		} elseif (isset($config['ntpd']['noserve'])) {
			unset($config['ntpd']['noserve']);
		}

		if (empty($_POST['nopeer'])) {
			$config['ntpd']['nopeer'] = 'on';
		} elseif (isset($config['ntpd']['nopeer'])) {
			unset($config['ntpd']['nopeer']);
		}

		if (empty($_POST['notrap'])) {
			$config['ntpd']['notrap'] = 'on';
		} elseif (isset($config['ntpd']['notrap'])) {
			unset($config['ntpd']['notrap']);
		}

		if ((empty($_POST['statsgraph'])) == (isset($config['ntpd']['statsgraph']))) {
			$enable_rrd_graphing = true;
		}
		if (!empty($_POST['statsgraph'])) {
			$config['ntpd']['statsgraph'] = $_POST['statsgraph'];
		} elseif (isset($config['ntpd']['statsgraph'])) {
			unset($config['ntpd']['statsgraph']);
		}
		if (isset($enable_rrd_graphing)) {
			enable_rrd_graphing();
		}

		if (!empty($_POST['leaptxt'])) {
			$config['ntpd']['leapsec'] = base64_encode($_POST['leaptxt']);
		} elseif (isset($config['ntpd']['leapsec'])) {
			unset($config['ntpd']['leapsec']);
		}

		if (is_uploaded_file($_FILES['leapfile']['tmp_name'])) {
			$config['ntpd']['leapsec'] = base64_encode(file_get_contents($_FILES['leapfile']['tmp_name']));
		}

		write_config("Updated NTP Server Settings");

		$retval = 0;
		$retval = system_ntp_configure();
		$savemsg = get_std_save_message($retval);
	}
}

function build_interface_list() {
	global $pconfig;

	$iflist = array('options' => array(), 'selected' => array());

	$interfaces = get_configured_interface_with_descr();
	$carplist = get_configured_carp_interface_list();

	foreach ($carplist as $cif => $carpip) {
		$interfaces[$cif] = $carpip . " (" . get_vip_descr($carpip) .")";
	}

	$aliaslist = get_configured_ip_aliases_list();

	foreach ($aliaslist as $aliasip => $aliasif) {
		$interfaces[$aliasip] = $aliasip." (".get_vip_descr($aliasip).")";
	}

	$size = (count($interfaces) < 10) ? count($interfaces) : 10;

	foreach ($interfaces as $iface => $ifacename) {
		if (!is_ipaddr(get_interface_ip($iface)) && !is_ipaddr($iface)) {
			continue;
		}

		$iflist['options']['$iface'] = $ifacename;

		if (in_array($iface, $pconfig['interface'])) {
			array_push($iflist['selected'], $iface);
		}
	}

	return($iflist);
}

$closehead = false;
$pconfig = &$config['ntpd'];
if (empty($pconfig['interface'])) {
	$pconfig['interface'] = array();
} else {
	$pconfig['interface'] = explode(",", $pconfig['interface']);
}
$pgtitle = array(gettext("Services"), gettext("NTP"));
$shortcut_section = "ntp";
include("head.inc");

if ($input_errors)
	print_input_errors($input_errors);
if ($savemsg)
	print_info_box($savemsg, 'success');

$tab_array = array();
$tab_array[] = array(gettext("NTP"), true, "services_ntpd.php");
$tab_array[] = array(gettext("Serial GPS"), false, "services_ntpd_gps.php");
$tab_array[] = array(gettext("PPS"), false, "services_ntpd_pps.php");
display_top_tabs($tab_array);

require_once('classes/Form.class.php');

$form = new Form;

$section = new Form_Section('NTP server configuration');

$iflist = build_interface_list();

$section->addInput(new Form_Select(
	'interface',
	'Interface',
	$iflist['selected'],
	$iflist['options'],
	true
))->setHelp('Interfaces without an IP address will not be shown.' . '<br />' .
			'Selecting no interfaces will listen on all interfaces with a wildcard.' . '<br />' .
			'Selecting all interfaces will explicitly listen on only the interfaces/IPs specified.');

// NUMTIMESERVERS time servers are always available, but we only display a smaller number of these ($maxrows)
// Clicking the 'Add Row' button increments $maxrows so you can see more of time servers
$timeservers = explode( ' ', $config['system']['timeservers']);
for ($i = $j = 0; $i < NUMTIMESERVERS; $i++) {

	if($i >= $maxrows)
		continue;

	$group = new Form_Group($i == 0 ? 'Time servers':'');

	$group->add(new Form_Input(
		'server' . $i,
		null,
		'text',
		$timeservers[$i]
	 ));

	 $group->add(new Form_Checkbox(
		'servprefer' . $i,
		null,
		'Prefer',
		isset($config['ntpd']['prefer']) && isset($timeservers[$i]) && substr_count($config['ntpd']['prefer'], $timeservers[$i])
	 ));

	 $group->add(new Form_Checkbox(
		'servselect' . $i,
		null,
		'NoSelect',
		isset($config['ntpd']['noselect']) && isset($timeservers[$i]) && substr_count($config['ntpd']['noselect'], $timeservers[$i])
	 ));

	 $section->add($group);
}

// Show the 'Add Rows' button only if we are currently displaying less than the maximum
// number of configured servers
if($maxrows < NUMTIMESERVERS) {
	$btnaddrow = new Form_Button(
		'btnaddrow',
		'Add Server',
		'services_ntpd.php?addrow=' . $maxrows
		);

	$btnaddrow->removeClass('btn-primary')->addClass('btn-success btn-sm');
} else {
	$btnaddrow = false;
}

$section->addInput(new Form_StaticText(
	null,
	$btnaddrow
))->setHelp('For best results three to five servers should be configured here.' . '<br />' .
			'The prefer option indicates that NTP should favor the use of this server more than all others.' . '<br />' .
			'The noselect option indicates that NTP should not use this server for time, but stats for this server will be collected and displayed.');

$section->addInput(new Form_Input(
	'ntporphan',
	'Orphan mode',
	'text',
	$pconfig['ntporphan']
))->setHelp('Orphan mode allows the system clock to be used when no other clocks are available. ' .
			'The number here specifies the stratum reported during orphan mode and should normally be set to a number high enough ' .
			'to insure that any other servers available to clients are preferred over this server. (default: 12).');

$section->addInput(new Form_Checkbox(
	'statsgraph',
	'NTP Graphs',
	'Enable RRD graphs of NTP statistics (default: disabled).',
	$pconfig['statsgraph']
));

$section->addInput(new Form_Checkbox(
	'logpeer',
	'Syslog logging',
	'Enable logging of peer messages (default: disabled).',
	$pconfig['logpeer']
));

$section->addInput(new Form_Checkbox(
	'logsys',
	null,
	'Enable logging of system messages (default: disabled).',
	$pconfig['logsys']
))->setHelp('These options enable additional messages from NTP to be written to the System Log ' .
			'<a href="diag_logs_ntpd.php">' . 'Status > System Logs > NTP' . '</a>');

// Statistics logging section
$btnadvstats = new Form_Button(
	'btnadvstats',
	'Advanced'
);

$btnadvstats->removeClass('btn-primary')->addClass('btn-default btn-sm');

$section->addInput(new Form_StaticText(
	'Statistics logging',
	$btnadvstats
))->setHelp('Warning: These options will create persistent daily log files in /var/log/ntp.');

$section->addInput(new Form_Checkbox(
	'clockstats',
	null,
	'Enable logging of reference clock statistics (default: disabled).',
	$pconfig['clockstats']
));

$section->addInput(new Form_Checkbox(
	'loopstats',
	null,
	'Enable logging of clock discipline statistics (default: disabled).',
	$pconfig['loopstats']
));

$section->addInput(new Form_Checkbox(
	'peerstats',
	null,
	'Enable logging of NTP peer statistics (default: disabled).',
	$pconfig['peerstats']
));

// Access restrictions section
$btnadvrestr = new Form_Button(
	'btnadvrestr',
	'Advanced'
);

$btnadvrestr->removeClass('btn-primary')->addClass('btn-default btn-sm');

$section->addInput(new Form_StaticText(
	'Access Restrictions',
	$btnadvrestr
))->setHelp('These options control access to NTP from the WAN.');

$section->addInput(new Form_Checkbox(
	'kod',
	null,
	'Enable Kiss-o\'-death packets (default: enabled).',
	$pconfig['kod']
));

$section->addInput(new Form_Checkbox(
	'nomodify',
	null,
	'Deny state modifications (i.e. run time configuration) by ntpq and ntpdc (default: enabled).',
	$pconfig['nomodify']
));

$section->addInput(new Form_Checkbox(
	'noquery',
	null,
	'Disable ntpq and ntpdc queries (default: disabled).',
	$pconfig['noquery']
));

$section->addInput(new Form_Checkbox(
	'noserve',
	null,
	'Disable all except ntpq and ntpdc queries (default: disabled).',
	$pconfig['noserve']
));

$section->addInput(new Form_Checkbox(
	'nopeer',
	null,
	'Deny packets that attempt a peer association (default: enabled).',
	$pconfig['nopeer']
));

$section->addInput(new Form_Checkbox(
	'notrap',
	null,
	'Deny mode 6 control message trap service (default: enabled).',
	$pconfig['notrap']
))->addClass('advrestrictions');

// Leap seconds section
$btnleap = new Form_Button(
	'btnleap',
	'Advanced'
);

$btnleap->removeClass('btn-primary')->addClass('btn-default btn-sm');

$section->addInput(new Form_StaticText(
	'Leap seconds',
	$btnleap
))->setHelp('A leap second file allows NTP to advertize an upcoming leap second addition or subtraction. ' .
			'Normally this is only useful if this server is a stratum 1 time server. ');

$section->addInput(new Form_Textarea(
	'leaptext',
	null,
	base64_decode(chunk_split($pconfig['leapsec']))
))->setHelp('Enter Leap second configuration as text OR select a file to upload');

$section->addInput(new Form_Input(
	'leapfile',
	null,
	'file'
))->addClass('btn-default');

$form->add($section);
print($form);

?>

<script>
//<![CDATA[
events.push(function(){

	// Hides the <div> in which the specified input element lives so that the input, its label and help text are hidden
	function hideInput(id, hide) {
		if(hide)
			$('#' + id).parent().parent('div').addClass('hidden');
		else
			$('#' + id).parent().parent('div').removeClass('hidden');
	}

	// Hides the <div> in which the specified checkbox lives so that the checkbox, its label and help text are hidden
	function hideCheckbox(id, hide) {
		if(hide)
			$('#' + id).parent().parent().parent('div').addClass('hidden');
		else
			$('#' + id).parent().parent().parent('div').removeClass('hidden');
	}

	// Make the ‘clear’ button a plain button, not a submit button
	$('#btnadvstats').prop('type','button');

	// On click, show the controls in the stats section
	$("#btnadvstats").click(function() {
		hideCheckbox('clockstats', false);
		hideCheckbox('loopstats', false);
		hideCheckbox('peerstats', false);
	});

	// Make the ‘clear’ button a plain button, not a submit button
	$('#btnadvrestr').prop('type','button');

	// On click, show the controls in the restrictions section
	$("#btnadvrestr").click(function() {
		hideCheckbox('nomodify', false);
		hideCheckbox('noquery', false);
		hideCheckbox('noserve', false);
		hideCheckbox('nopeer', false);
		hideCheckbox('notrap', false);
	});

	// Make the ‘btnleap’ button a plain button, not a submit button
	$('#btnleap').prop('type','button');

	// On click, show the controls in the leap seconds section
	$("#btnleap").click(function() {
		hideInput('leaptext', false);
		hideInput('leapfile', false);
	});

	// Set intial states
	hideCheckbox('clockstats', true);
	hideCheckbox('loopstats', true);
	hideCheckbox('peerstats', true);
	hideCheckbox('kod', true);
	hideCheckbox('nomodify', true);
	hideCheckbox('noquery', true);
	hideCheckbox('noserve', true);
	hideCheckbox('nopeer', true);
	hideCheckbox('notrap', true);
	hideInput('leaptext', true);
	hideInput('leapfile', true);
});
//]]>
</script>

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