<?php

/*
	Copyright (C) 2014-2015 Deciso B.V.
	Copyright (C) 2005-2007 Scott Ullrich
	Copyright (C) 2008 Shrew Soft Inc
	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("interfaces.inc");
require_once("filter.inc");
require_once("system.inc");
require_once("pfsense-utils.inc");

function system_enable_arp_wrong_if()
{
    set_sysctl(array(
        "net.link.ether.inet.log_arp_wrong_iface" => "1",
        "net.link.ether.inet.log_arp_movements" => "1"
    ));
}


if (isset($_POST) && count($_POST) > 0) {
    $input_errors = array();

    if (isset($_POST['ipv6nat_enable']) && !is_ipaddr($_POST['ipv6nat_ipaddr'])) {
        $input_errors[] = gettext("You must specify an IP address to NAT IPv6 packets.");
    }

    if (isset($_POST['ipv6nat_enable']) && $_POST['ipv6nat_enable'] == "yes") {
	$config['diag']['ipv6nat'] = array();
        $config['diag']['ipv6nat']['enable'] = true;
        $config['diag']['ipv6nat']['ipaddr'] = $_POST['ipv6nat_ipaddr'];
    } elseif (isset($config['diag']['ipv6nat'])) {
        unset($config['diag']['ipv6nat']);
    }

    if (isset($_POST['ipv6allow']) && $_POST['ipv6allow'] == "yes") {
        $config['system']['ipv6allow'] = true;
    } else {
        unset($config['system']['ipv6allow']);
    }

    if (isset($_POST['prefer_ipv4']) && $_POST['prefer_ipv4'] == "yes") {
        $config['system']['prefer_ipv4'] = true;
    } else {
        unset($config['system']['prefer_ipv4']);
    }

    if (isset($_POST['sharednet']) && $_POST['sharednet'] == "yes") {
        $config['system']['sharednet'] = true;
    } else {
        unset($config['system']['sharednet']);
    }

    if (isset($_POST['polling_enable']) && $_POST['polling_enable'] == "yes") {
        $config['system']['polling'] = true;
    } else {
        unset($config['system']['polling']);
    }

    if (isset($_POST['disablechecksumoffloading']) && $_POST['disablechecksumoffloading'] == "yes") {
        $config['system']['disablechecksumoffloading'] = true;
    } else {
        unset($config['system']['disablechecksumoffloading']);
    }

    if (isset($_POST['disablesegmentationoffloading']) && $_POST['disablesegmentationoffloading'] == "yes") {
        $config['system']['disablesegmentationoffloading'] = true;
    } else {
        unset($config['system']['disablesegmentationoffloading']);
    }

    if (isset($_POST['disablelargereceiveoffloading']) && $_POST['disablelargereceiveoffloading'] == "yes") {
        $config['system']['disablelargereceiveoffloading'] = true;
    } else {
        unset($config['system']['disablelargereceiveoffloading']);
    }

    if (isset($_POST['disablevlanhwfilter']) && $_POST['disablevlanhwfilter'] == "yes") {
        $config['system']['disablevlanhwfilter'] = true;
    } else {
        unset($config['system']['disablevlanhwfilter']);
    }

    if (count($input_errors) == 0) {
        setup_polling();
        if (isset($config['system']['sharednet'])) {
            system_disable_arp_wrong_if();
        } else {
            system_enable_arp_wrong_if();
        }
        setup_microcode();

        write_config();
        $savemsg = get_std_save_message();

        prefer_ipv4_or_ipv6();
        filter_configure();
    }
}

$pgtitle = array(gettext("System"),gettext("Settings"),gettext("Networking"));
include("head.inc");

?>

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

    <script type="text/javascript">
    //<![CDATA[

    function enable_change(enable_over) {
	if (document.iform.ipv6nat_enable.checked || enable_over)
		document.iform.ipv6nat_ipaddr.disabled = 0;
	else
		document.iform.ipv6nat_ipaddr.disabled = 1;
    }

    //]]>
    </script>


<!-- row -->
<section class="page-content-main">
	<div class="container-fluid">
        <div class="row">
            <?php
            if (isset($input_errors) && count($input_errors) > 0) {
                print_input_errors($input_errors);
            }
            if (isset($savemsg)) {
                print_info_box($savemsg);
            }
            ?>
            <section class="col-xs-12">
                <div class="content-box tab-content">
					<form action="system_advanced_network.php" method="post" name="iform" id="iform">

						<table width="100%" border="0" cellpadding="6" cellspacing="0" summary="main area" class="table table-striped">
							<thead>
								<tr>
									<th colspan="2" valign="top" class="listtopic"><?=gettext("IPv6 Options"); ?></th>
								</tr>
							</thead>
							<tbody>
								<tr>
									<td width="22%" valign="top" class="vncell"><?=gettext("Allow IPv6"); ?></td>
									<td width="78%" class="vtable">
										<input name="ipv6allow" type="checkbox" id="ipv6allow" value="yes" <?php if (isset($config['system']['ipv6allow'])) {
                                            echo "checked=\"checked\"";
} ?> onclick="enable_change(false)" />
										<strong><?=gettext("Allow IPv6"); ?></strong><br />
										<?=gettext("All IPv6 traffic will be blocked by the firewall unless this box is checked."); ?><br />
										<?=gettext("NOTE: This does not disable any IPv6 features on the firewall, it only blocks traffic."); ?><br />
										<br />
									</td>
								</tr>
								<tr>
									<td width="22%" valign="top" class="vncell"><?=gettext("IPv6 over IPv4 Tunneling"); ?></td>
									<td width="78%" class="vtable">
										<input name="ipv6nat_enable" type="checkbox" id="ipv6nat_enable" value="yes" <?php if (isset($config['diag']['ipv6nat']['enable'])) {
                                            echo "checked=\"checked\"";
} ?> onclick="enable_change(false)" />
										<strong><?=gettext("Enable IPv4 NAT encapsulation of IPv6 packets"); ?></strong><br />
										<?=gettext("This provides an RFC 2893 compatibility mechanism ".
                                        "that can be used to tunneling IPv6 packets over IPv4 ".
                                        "routing infrastructures. If enabled, don't forget to ".
                                        "add a firewall rule to permit IPv6 packets."); ?><br />
										<br />
										<?=gettext("IP address"); ?>&nbsp;:&nbsp;
										<input name="ipv6nat_ipaddr" type="text" class="formfld unknown" id="ipv6nat_ipaddr" size="20" value="<?=htmlspecialchars(isset($config['diag']['ipv6nat']['ipaddr']) ? $config['diag']['ipv6nat']['ipaddr']:"");?>" />
									</td>
								</tr>
								<tr>
									<td width="22%" valign="top" class="vncell"><?=gettext("Prefer IPv4 over IPv6"); ?></td>
									<td width="78%" class="vtable">
										<input name="prefer_ipv4" type="checkbox" id="prefer_ipv4" value="yes" <?php if (isset($config['system']['prefer_ipv4'])) {
                                            echo "checked=\"checked\"";
} ?> />
										<strong><?=gettext("Prefer to use IPv4 even if IPv6 is available"); ?></strong><br />
										<?=gettext("By default, if a hostname resolves IPv6 and IPv4 addresses ".
                                        "IPv6 will be used, if you check this option, IPv4 will be " .
                                        "used instead of IPv6."); ?><br />
									</td>
								</tr>
								<tr>
									<th colspan="2" valign="top" class="listtopic"><?=gettext("Network Interfaces"); ?></th>
								</tr>
								<tr>
									<td width="22%" valign="top" class="vncell"><?=gettext("Device polling"); ?></td>
									<td width="78%" class="vtable">
										<input name="polling_enable" type="checkbox" id="polling_enable" value="yes" <?php if (isset($config['system']['polling'])) {
                                            echo "checked=\"checked\"";
} ?> />
										<strong><?=gettext("Enable device polling"); ?></strong><br />
										<?php printf(gettext("Device polling is a technique that lets the system periodically poll network devices for new data instead of relying on interrupts. This prevents your webConfigurator, SSH, etc. from being inaccessible due to interrupt floods when under extreme load. Generally this is not recommended. Not all NICs support polling; see the %s homepage for a list of supported cards."), $g['product_name']); ?>
									</td>
								</tr>
								<tr>
									<td width="22%" valign="top" class="vncell"><?=gettext("Hardware Checksum Offloading"); ?></td>
									<td width="78%" class="vtable">
										<input name="disablechecksumoffloading" type="checkbox" id="disablechecksumoffloading" value="yes" <?php if (isset($config['system']['disablechecksumoffloading'])) {
                                            echo "checked=\"checked\"";
} ?> />
										<strong><?=gettext("Disable hardware checksum offload"); ?></strong><br />
										<?=gettext("Checking this option will disable hardware checksum offloading. Checksum offloading is broken in some hardware, particularly some Realtek cards. Rarely, drivers may have problems with checksum offloading and some specific NICs."); ?>
										<br />
										<span class="red"><strong><?=gettext("Note:");?>&nbsp;</strong></span>
										<?=gettext("This will take effect after you reboot the machine or re-configure each interface.");?>
									</td>
								</tr>
								<tr>
									<td width="22%" valign="top" class="vncell"><?=gettext("Hardware TCP Segmentation Offloading"); ?></td>
									<td width="78%" class="vtable">
										<input name="disablesegmentationoffloading" type="checkbox" id="disablesegmentationoffloading" value="yes" <?php if (isset($config['system']['disablesegmentationoffloading'])) {
                                            echo "checked=\"checked\"";
} ?> />
										<strong><?=gettext("Disable hardware TCP segmentation offload"); ?></strong><br />
										<?=gettext("Checking this option will disable hardware TCP segmentation offloading (TSO, TSO4, TSO6). This offloading is broken in some hardware drivers, and may impact performance with some specific NICs."); ?>
										<br />
										<span class="red"><strong><?=gettext("Note:");?>&nbsp;</strong></span>
										<?=gettext("This will take effect after you reboot the machine or re-configure each interface.");?>
									</td>
								</tr>
								<tr>
									<td width="22%" valign="top" class="vncell"><?=gettext("Hardware Large Receive Offloading"); ?></td>
									<td width="78%" class="vtable">
										<input name="disablelargereceiveoffloading" type="checkbox" id="disablelargereceiveoffloading" value="yes" <?php if (isset($config['system']['disablelargereceiveoffloading'])) {
                                            echo "checked=\"checked\"";
} ?> />
										<strong><?=gettext("Disable hardware large receive offload"); ?></strong><br />
										<?=gettext("Checking this option will disable hardware large receive offloading (LRO). This offloading is broken in some hardware drivers, and may impact performance with some specific NICs."); ?>
										<br />
										<span class="red"><strong><?=gettext("Note:");?>&nbsp;</strong></span>
										<?=gettext("This will take effect after you reboot the machine or re-configure each interface.");?>
									</td>
								</tr>
								<tr>
									<td width="22%" valign="top" class="vncell"><?=gettext("VLAN Hardware Filtering"); ?></td>
									<td width="78%" class="vtable">
										<input name="disablevlanhwfilter" type="checkbox" id="disablevlanhwfilter" value="yes" <?php if (isset($config['system']['disablevlanhwfilter'])) {
                                            echo "checked=\"checked\"";
} ?> />
										<strong><?=gettext("Disable VLAN Hardware Filtering"); ?></strong><br />
										<?=gettext("Checking this option will disable VLAN hardware filtering. This offloading is broken in some hardware drivers, and may impact performance with some specific NICs."); ?>
										<br />
										<span class="red"><strong><?=gettext("Note:");?>&nbsp;</strong></span>
										<?=gettext("This will take effect after you reboot the machine or re-configure each interface.");?>
									</td>
								</tr>
								<tr>
									<td width="22%" valign="top" class="vncell"><?=gettext("ARP Handling"); ?></td>
									<td width="78%" class="vtable">
										<input name="sharednet" type="checkbox" id="sharednet" value="yes" <?php if (isset($config['system']['sharednet'])) {
                                            echo "checked=\"checked\"";
} ?> />
										<strong><?=gettext("Suppress ARP messages"); ?></strong><br />
										<?=gettext("This option will suppress ARP log messages when multiple interfaces reside on the same broadcast domain"); ?>
									</td>
								</tr>
							<tr>
								<td width="22%" valign="top">&nbsp;</td>
								<td width="78%"><input name="Submit" type="submit" class="btn btn-primary" value="<?=gettext("Save");?>" /></td>
							</tr>
							</tbody>
						</table>
					</form>
				</div>
			</section>
		</div>
	</div>
</section>

<script type="text/javascript">
//<![CDATA[
	enable_change(false);
//]]>
</script>

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