<?php
/* $Id$ */
/*
	system.php
	part of m0n0wall (http://m0n0.ch/wall)

	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.
*/

##|+PRIV
##|*IDENT=page-system-generalsetup
##|*NAME=System: General Setup page
##|*DESCR=Allow access to the 'System: General Setup' page.
##|*MATCH=system.php*
##|-PRIV


require("guiconfig.inc");

$pconfig['hostname'] = $config['system']['hostname'];
$pconfig['domain'] = $config['system']['domain'];
list($pconfig['dns1'],$pconfig['dns2'],$pconfig['dns3'],$pconfig['dns4']) = $config['system']['dnsserver'];

$pconfig['dns1gwint'] = $config['system']['dns1gwint'];
$pconfig['dns2gwint'] = $config['system']['dns2gwint'];
$pconfig['dns3gwint'] = $config['system']['dns3gwint'];
$pconfig['dns4gwint'] = $config['system']['dns4gwint'];

$pconfig['dnsallowoverride'] = isset($config['system']['dnsallowoverride']);
$pconfig['timezone'] = $config['system']['timezone'];
$pconfig['timeupdateinterval'] = $config['system']['time-update-interval'];
$pconfig['timeservers'] = $config['system']['timeservers'];
$pconfig['theme'] = $config['system']['theme'];

if (!isset($pconfig['timeupdateinterval']))
	$pconfig['timeupdateinterval'] = 300;
if (!$pconfig['timezone'])
	$pconfig['timezone'] = "Etc/UTC";
if (!$pconfig['timeservers'])
	$pconfig['timeservers'] = "pool.ntp.org";

$changedesc = "System: ";
$changecount = 0;

function is_timezone($elt) {
	return !preg_match("/\/$/", $elt);
}

if($pconfig['timezone'] <> $_POST['timezone']) {
	/* restart firewall log dumper helper */
	require_once("functions.inc");
	$pid = `ps awwwux | grep -v "grep" | grep "tcpdump -v -l -n -e -ttt -i pflog0"  | awk '{ print $2 }'`;
	if($pid) {
		mwexec("kill $pid");
		usleep(1000);
	}		
	filter_pflog_start();
}

exec('/usr/bin/tar -tzf /usr/share/zoneinfo.tgz', $timezonelist);
$timezonelist = array_filter($timezonelist, 'is_timezone');
sort($timezonelist);

$multiwan = false;
$interfaces = get_configured_interface_list();
foreach($interfaces as $interface) {
	if(interface_has_gateway($interface)) {
		$multiwan = true;
	}
}

if ($_POST) {

	$changecount++;
	
	unset($input_errors);
	$pconfig = $_POST;

	/* input validation */
	$reqdfields = split(" ", "hostname domain");
	$reqdfieldsn = split(",", "Hostname,Domain");

	do_input_validation($_POST, $reqdfields, $reqdfieldsn, &$input_errors);

	if ($_POST['hostname'] && !is_hostname($_POST['hostname'])) {
		$input_errors[] = "The hostname may only contain the characters a-z, 0-9 and '-'.";
	}
	if ($_POST['domain'] && !is_domain($_POST['domain'])) {
		$input_errors[] = "The domain may only contain the characters a-z, 0-9, '-' and '.'.";
	}
	if (($_POST['dns1'] && !is_ipaddr($_POST['dns1'])) || ($_POST['dns2'] && !is_ipaddr($_POST['dns2']))) {
		$input_errors[] = "A valid IP address must be specified for the primary/secondary DNS server.";
	}
	if (($_POST['dns3'] && !is_ipaddr($_POST['dns3'])) || ($_POST['dns4'] && !is_ipaddr($_POST['dns4']))) {
		$input_errors[] = "A valid IP address must be specified for the primary/secondary DNS server.";
	}	
	if ($_POST['webguiport'] && (!is_numericint($_POST['webguiport']) ||
			($_POST['webguiport'] < 1) || ($_POST['webguiport'] > 65535))) {
		$input_errors[] = "A valid TCP/IP port must be specified for the webConfigurator port.";
	}

	$direct_networks_list = explode(" ", get_direct_networks_list());
	for ($dnscounter=1; $dnscounter<5; $dnscounter++) {
		$dnsitem = "dns{$dnscounter}";
		$dnsgwitem = "dns{$dnscounter}gwint";
		if ($_POST[$dnsgwitem]) {
			if(interface_has_gateway($_POST[$dnsgwitem])) {
				foreach($direct_networks_list as $direct_network) {
					if(ip_in_subnet($_POST[$dnsitem], $direct_network)) {
						$input_errors[] = "You can not assign a gateway to DNS '{$_POST[$dnsitem]}' server which is on a directly connected network.";
					}
				}
			}
		}
	}

	$t = (int)$_POST['timeupdateinterval'];
	if (($t < 0) || (($t > 0) && ($t < 6)) || ($t > 1440)) {
		$input_errors[] = "The time update interval must be either 0 (disabled) or between 6 and 1440.";
	}
	foreach (explode(' ', $_POST['timeservers']) as $ts) {
		if (!is_domain($ts)) {
			$input_errors[] = "A NTP Time Server name may only contain the characters a-z, 0-9, '-' and '.'.";
		}
	}

	if (!$input_errors) {
		update_if_changed("hostname", $config['system']['hostname'], strtolower($_POST['hostname']));
		update_if_changed("domain", $config['system']['domain'], strtolower($_POST['domain']));

		update_if_changed("timezone", $config['system']['timezone'], $_POST['timezone']);
		update_if_changed("NTP servers", $config['system']['timeservers'], strtolower($_POST['timeservers']));
		update_if_changed("NTP update interval", $config['system']['time-update-interval'], $_POST['timeupdateinterval']);

		/* pfSense themes */
		update_if_changed("System Theme", $config['theme'], $_POST['theme']);

		/* XXX - billm: these still need updating after figuring out how to check if they actually changed */
		unset($config['system']['dnsserver']);
		if ($_POST['dns1'])
			$config['system']['dnsserver'][] = $_POST['dns1'];
		if ($_POST['dns2'])
			$config['system']['dnsserver'][] = $_POST['dns2'];
		if ($_POST['dns3'])
			$config['system']['dnsserver'][] = $_POST['dns3'];
		if ($_POST['dns4'])
			$config['system']['dnsserver'][] = $_POST['dns4'];

		$olddnsallowoverride = $config['system']['dnsallowoverride'];

		unset($config['system']['dnsallowoverride']);
		$config['system']['dnsallowoverride'] = $_POST['dnsallowoverride'] ? true : false;

		/* which interface should the dns servers resolve through? */
		if($_POST['dns1gwint']) 
			$config['system']['dns1gwint'] = $pconfig['dns1gwint'];
		else 
			unset($config['system']['dns1gwint']);

		if($_POST['dns2gwint']) 
			$config['system']['dns2gwint'] = $pconfig['dns2gwint'];
		else
			unset($config['system']['dns2gwint']);

		if($_POST['dns3gwint']) 
			$config['system']['dns3gwint'] = $pconfig['dns3gwint'];
		else 
			unset($config['system']['dns3gwint']);

		if($_POST['dns4gwint']) 
			$config['system']['dns4gwint'] = $pconfig['dns4gwint'];
		else
			unset($config['system']['dns4gwint']);

		if ($changecount > 0)
			write_config($changedesc);

		$retval = 0;
		config_lock();
		$retval = system_hostname_configure();
		$retval |= system_hosts_generate();
		$retval |= system_resolvconf_generate();
		$retval |= services_dnsmasq_configure();
		$retval |= system_timezone_configure();
		$retval |= system_ntp_configure();

		/* XXX: ermal -- What is this supposed to do?! */
		if ($olddnsallowoverride != $config['system']['dnsallowoverride'])
			$retval |= interface_configure();

		// Reload the filter - plugins might need to be run.
		filter_configure();
		
		config_unlock();

		$savemsg = get_std_save_message($retval);
	}
}

$pgtitle = array("System","General Setup");
include("head.inc");

?>

<body link="#0000CC" vlink="#0000CC" alink="#0000CC">
<?php
	include("fbegin.inc");
	if ($input_errors)
		print_input_errors($input_errors);
	if ($savemsg)
		print_info_box($savemsg);
?>
	<form action="system.php" method="post">
		<table width="100%" border="0" cellpadding="6" cellspacing="0">
			<tr>
				<td colspan="2" valign="top" class="listtopic">System</td>
			</tr>
			<tr>
				<td width="22%" valign="top" class="vncellreq">Hostname</td>
				<td width="78%" class="vtable"> <input name="hostname" type="text" class="formfld unknown" id="hostname" size="40" value="<?=htmlspecialchars($pconfig['hostname']);?>">
					<br/>
					<span class="vexpl">
						name of the firewall host, without domain part
						<br>
						e.g. <em>firewall</em>
					</span>
				</td>
			</tr>
			<tr>
				<td width="22%" valign="top" class="vncellreq">Domain</td>
				<td width="78%" class="vtable"> <input name="domain" type="text" class="formfld unknown" id="domain" size="40" value="<?=htmlspecialchars($pconfig['domain']);?>">
					<br/>
					<span class="vexpl">
						e.g. <em>mycorp.com</em>
					</span>
				</td>
			</tr>
			<tr>
				<td width="22%" valign="top" class="vncell">DNS servers</td>
				<td width="78%" class="vtable">
					<p>
						<table>
							<tr>
								<td><b>DNS Server</b></td>
								<?php if ($multiwan): ?>
								<td><b>Use gateway</b></td>
								<?php endif; ?>
							</tr>
							<?php
								for ($dnscounter=1; $dnscounter<5; $dnscounter++):
									$fldname="dns{$dnscounter}gwint";
							?>
							<tr>
								<td>
									<input name="dns<?php echo $dnscounter;?>" type="text" class="formfld unknown" id="dns<?php echo $dnscounter;?>" size="20" value="<?php echo $pconfig['dns'.$dnscounter];?>">
								</td>
								<td>
<?php if ($multiwan): ?>
									<select name='<?=$fldname;?>'>
										<?php
											$interface = "none";
											$dnsgw = "dns{$dnscounter}gwint";
											if($pconfig[$dnsgw] == $interface) {
												$selected = "selected";
											} else {
												$selected = "";
											}
											echo "<option value='$interface' $selected>". ucwords($interface) ."</option>\n";
											foreach($interfaces as $interface) {
												if(interface_has_gateway($interface)) {
													if($pconfig[$dnsgw] == $interface) {
														$selected = "selected";
													} else {
														$selected = "";
													}
													echo "<option value='$interface' $selected>". ucwords($interface) ."</option>\n";
												}
											}
										?>
									</select>
<?php endif; ?>
								</td>
							</tr>
							<?php endfor; ?>
						</table>
						<br>
						<span class="vexpl">
							IP addresses; these are also used for the DHCP
							service, DNS forwarder and for PPTP VPN clients.
							<br/>
							<?php if($multiwan): ?>
							<br/>
							In addition, select the gateway for each DNS server.
							You should have a unique DNS server per gateway.
							<br/>
							<?php endif; ?>
							<br/>
							<input name="dnsallowoverride" type="checkbox" id="dnsallowoverride" value="yes" <?php if ($pconfig['dnsallowoverride']) echo "checked"; ?>>
							<strong>
								Allow DNS server list to be overridden by DHCP/PPP
								on WAN
							</strong>
							<br/>
							If this option is set, <?=$g['product_name'];?> will
							use DNS servers assigned by a DHCP/PPP server on WAN
							for its own purposes (including the DNS forwarder).
							However, they will not be assigned to DHCP and PPTP
							VPN	clients.
						</span>
					</p>
				</td>
			</tr>
			<tr>
				<td width="22%" valign="top" class="vncell">Time zone</td>
				<td width="78%" class="vtable">
					<select name="timezone" id="timezone">
						<?php foreach ($timezonelist as $value): ?>
						<option value="<?=htmlspecialchars($value);?>" <?php if ($value == $pconfig['timezone']) echo "selected"; ?>>
							<?=htmlspecialchars($value);?>
						</option>
						<?php endforeach; ?>
					</select>
					<br/>
					<span class="vexpl">
						Select the location closest to you
					</span>
				</td>
			</tr>
<!--
			<tr>
				<td width="22%" valign="top" class="vncell">Time update interval</td>
				<td width="78%" class="vtable">
					<input name="timeupdateinterval" type="text" class="formfld unknown" id="timeupdateinterval" size="4" value="<?=htmlspecialchars($pconfig['timeupdateinterval']);?>">
					<br/>
					<span class="vexpl">
						Minutes between network time sync. 300 recommended,
						or 0 to disable
					</span>
				</td>
			</tr>
-->
			<tr>
				<td width="22%" valign="top" class="vncell">NTP time server</td>
				<td width="78%" class="vtable">
					<input name="timeservers" type="text" class="formfld unknown" id="timeservers" size="40" value="<?=htmlspecialchars($pconfig['timeservers']);?>">
					<br/>
					<span class="vexpl">
						Use a space to separate multiple hosts (only one
						required). Remember to set up at least one DNS server
						if you enter a host name here!
					</span>
				</td>
			</tr>
			<tr>
				<td colspan="2" class="list" height="12">&nbsp;</td>
			</tr>
			<tr>
				<td colspan="2" valign="top" class="listtopic">Theme</td>
			</tr>
			<tr>
				<td width="22%" valign="top" class="vncell">&nbsp;</td>
				<td width="78%" class="vtable">
					<select name="theme">
						<?php
							$files = return_dir_as_array("/usr/local/www/themes/");
							foreach($files as $f):
								if ((substr($f, 0, 1) == "_") && !isset($config['system']['developer']))
									continue;
								if ($f == "CVS")
									continue;
								$curtheme = "pfsense";
								if ($config['theme'])
									$curtheme = $config['theme'];
								$selected = "";
								if($f == $curtheme)
									$selected = " SELECTED";
						?>
						<option <?=$selected;?>><?=$f;?></option>
						<?php endforeach; ?>
					</select>
					<strong>
						This will change the look and feel of
						<?=$g['product_name'];?>.
					</strong>
				</td>
			</tr>
			<tr>
				<td colspan="2" class="list" height="12">&nbsp;</td>
			</tr>			
			<tr>
				<td width="22%" valign="top">&nbsp;</td>
				<td width="78%">
					<input name="Submit" type="submit" class="formbtn" value="Save">
				</td>
			</tr>
		</table>
	</form>
<?php include("fend.inc"); ?>
</body>
</html>