require "guiconfig.inc";
$if = $_GET['if'];
if ($_POST['if']) {
    $if = $_POST['if'];
}
if (!$if) {
    header("Location: services_dhcpv6.php");
    exit;
}
if (!is_array($config['dhcpdv6'][$if]['staticmap'])) {
    $config['dhcpdv6'][$if]['staticmap'] = array();
}
$netboot_enabled = isset($config['dhcpdv6'][$if]['netboot']);
$a_maps =& $config['dhcpdv6'][$if]['staticmap'];
$ifcfgipv6 = get_interface_ipv6($if);
$ifcfgsnv6 = get_interface_subnetv6($if);
$ifcfgdescr = convert_friendly_interface_to_friendly_descr($if);
$id = $_GET['id'];
if (isset($_POST['id'])) {
    $id = $_POST['id'];
}
if (isset($id) && $a_maps[$id]) {
    $pconfig['duid'] = $a_maps[$id]['duid'];
    $pconfig['hostname'] = $a_maps[$id]['hostname'];
    $pconfig['ipaddrv6'] = $a_maps[$id]['ipaddrv6'];
    $pconfig['filename'] = $a_maps[$id]['filename'];
    $pconfig['rootpath'] = $a_maps[$id]['rootpath'];
    $pconfig['descr'] = $a_maps[$id]['descr'];
} else {
    $pconfig['duid'] = $_GET['duid'];
    $pconfig['hostname'] = $_GET['hostname'];

     } else {
         if (strpos($_POST['interface'], '_vip')) {
             $input_errors[] = gettext("A CARP parent interface can only be used with IP Alias type Virtual IPs.");
         }
     }
     break;
 case 'ipalias':
     if (strstr($_POST['interface'], "_vip")) {
         if (is_ipaddrv4($_POST['subnet'])) {
             $parent_ip = get_interface_ip($_POST['interface']);
             $parent_sn = get_interface_subnet($_POST['interface']);
             $subnet = gen_subnet($parent_ip, $parent_sn);
         } else {
             if (is_ipaddrv6($_POST['subnet'])) {
                 $parent_ip = get_interface_ipv6($_POST['interface']);
                 $parent_sn = get_interface_subnetv6($_POST['interface']);
                 $subnet = gen_subnetv6($parent_ip, $parent_sn);
             }
         }
         if (isset($parent_ip) && !ip_in_subnet($_POST['subnet'], "{$subnet}/{$parent_sn}") && !ip_in_interface_alias_subnet(link_carp_interface_to_parent($_POST['interface']), $_POST['subnet'])) {
             $cannot_find = $_POST['subnet'] . "/" . $_POST['subnet_bits'];
             $input_errors[] = sprintf(gettext("Sorry, we could not locate an interface with a matching subnet for %s.  Please add an IP alias in this subnet on this interface."), $cannot_find);
         }
         unset($parent_ip, $parent_sn, $subnet);
     }
     break;
 default:
     if ($_POST['interface'] == 'lo0') {
         $input_errors[] = gettext("For this type of vip localhost is not allowed.");
     } else {
         if (strpos($_POST['interface'], '_vip')) {

         $found = false;
         foreach ($subnets as $subnet) {
             if (ip_in_subnet($pconfig['gateway'], $subnet)) {
                 $found = true;
                 break;
             }
         }
         if (!$found) {
             $input_errors[] = sprintf(gettext("The gateway address %1\$s does not lie within one of the chosen interface's subnets."), $pconfig['gateway']);
         }
     }
 } elseif (is_ipaddrv6($pconfig['gateway'])) {
     /* do not do a subnet match on a link local address, it's valid */
     if (!is_linklocal($pconfig['gateway'])) {
         $parent_ip = get_interface_ipv6($pconfig['interface']);
         $parent_sn = get_interface_subnetv6($pconfig['interface']);
         if (empty($parent_ip) || empty($parent_sn)) {
             $input_errors[] = gettext("Cannot add IPv6 Gateway Address because no IPv6 address could be found on the interface.");
         } else {
             $subnets = array(gen_subnetv6($parent_ip, $parent_sn) . "/" . $parent_sn);
             $vips = link_interface_to_vips($pconfig['interface']);
             if (is_array($vips)) {
                 foreach ($vips as $vip) {
                     if (!is_ipaddrv6($vip['subnet'])) {
                         continue;
                     }
                     $subnets[] = gen_subnetv6($vip['subnet'], $vip['subnet_bits']) . "/" . $vip['subnet_bits'];
                 }
             }
             $found = false;
             foreach ($subnets as $subnet) {

 if ($a_vip[$_GET['id']]) {
     /* make sure no inbound NAT mappings reference this entry */
     if (is_array($config['nat']['rule'])) {
         foreach ($config['nat']['rule'] as $rule) {
             if ($rule['destination']['address'] != "") {
                 if ($rule['destination']['address'] == $a_vip[$_GET['id']]['subnet']) {
                     $input_errors[] = gettext("This entry cannot be deleted because it is still referenced by at least one NAT mapping.");
                     break;
                 }
             }
         }
     }
     if (is_ipaddrv6($a_vip[$_GET['id']]['subnet'])) {
         $is_ipv6 = true;
         $subnet = gen_subnetv6($a_vip[$_GET['id']]['subnet'], $a_vip[$_GET['id']]['subnet_bits']);
         $if_subnet_bits = get_interface_subnetv6($a_vip[$_GET['id']]['interface']);
         $if_subnet = gen_subnetv6(get_interface_ipv6($a_vip[$_GET['id']]['interface']), $if_subnet_bits);
     } else {
         $is_ipv6 = false;
         $subnet = gen_subnet($a_vip[$_GET['id']]['subnet'], $a_vip[$_GET['id']]['subnet_bits']);
         $if_subnet_bits = get_interface_subnet($a_vip[$_GET['id']]['interface']);
         $if_subnet = gen_subnet(get_interface_ip($a_vip[$_GET['id']]['interface']), $if_subnet_bits);
     }
     $subnet .= "/" . $a_vip[$_GET['id']]['subnet_bits'];
     $if_subnet .= "/" . $if_subnet_bits;
     if (is_array($config['gateways']['gateway_item'])) {
         foreach ($config['gateways']['gateway_item'] as $gateway) {
             if ($a_vip[$_GET['id']]['interface'] != $gateway['interface']) {
                 continue;
             }
             if ($is_ipv6 && $gateway['ipprotocol'] == 'inet') {

/**
 * delete virtual ip
 */
function deleteVIPEntry($id)
{
    global $config;
    $input_errors = array();
    $a_vip =& $config['virtualip']['vip'];
    /* make sure no inbound NAT mappings reference this entry */
    if (isset($config['nat']['rule'])) {
        foreach ($config['nat']['rule'] as $rule) {
            if (!empty($rule['destination']['address'])) {
                if ($rule['destination']['address'] == $a_vip[$id]['subnet']) {
                    $input_errors[] = gettext("This entry cannot be deleted because it is still referenced by at least one NAT mapping.");
                    break;
                }
            }
        }
    }
    if (is_ipaddrv6($a_vip[$id]['subnet'])) {
        $is_ipv6 = true;
        $subnet = gen_subnetv6($a_vip[$id]['subnet'], $a_vip[$id]['subnet_bits']);
        $if_subnet_bits = get_interface_subnetv6($a_vip[$id]['interface']);
        $if_subnet = gen_subnetv6(get_interface_ipv6($a_vip[$id]['interface']), $if_subnet_bits);
    } else {
        $is_ipv6 = false;
        $subnet = gen_subnet($a_vip[$id]['subnet'], $a_vip[$id]['subnet_bits']);
        $if_subnet_bits = get_interface_subnet($a_vip[$id]['interface']);
        $if_subnet = gen_subnet(get_interface_ip($a_vip[$id]['interface']), $if_subnet_bits);
    }
    $subnet .= "/" . $a_vip[$id]['subnet_bits'];
    $if_subnet .= "/" . $if_subnet_bits;
    if (isset($config['gateways']['gateway_item'])) {
        foreach ($config['gateways']['gateway_item'] as $gateway) {
            if ($a_vip[$id]['interface'] != $gateway['interface']) {
                continue;
            }
            if ($is_ipv6 && $gateway['ipprotocol'] == 'inet') {
                continue;
            }
            if (!$is_ipv6 && $gateway['ipprotocol'] == 'inet6') {
                continue;
            }
            if (ip_in_subnet($gateway['gateway'], $if_subnet)) {
                continue;
            }
            if (ip_in_subnet($gateway['gateway'], $subnet)) {
                $input_errors[] = gettext("This entry cannot be deleted because it is still referenced by at least one Gateway.");
                break;
            }
        }
    }
    if ($a_vip[$id]['mode'] == "ipalias") {
        $subnet = gen_subnet($a_vip[$id]['subnet'], $a_vip[$id]['subnet_bits']) . "/" . $a_vip[$id]['subnet_bits'];
        $found_if = false;
        $found_carp = false;
        $found_other_alias = false;
        if ($subnet == $if_subnet) {
            $found_if = true;
        }
        $vipiface = $a_vip[$id]['interface'];
        foreach ($a_vip as $vip_id => $vip) {
            if ($vip_id != $id) {
                if ($vip['interface'] == $vipiface && ip_in_subnet($vip['subnet'], $subnet)) {
                    if ($vip['mode'] == "carp") {
                        $found_carp = true;
                    } else {
                        if ($vip['mode'] == "ipalias") {
                            $found_other_alias = true;
                        }
                    }
                }
            }
        }
        if ($found_carp === true && $found_other_alias === false && $found_if === false) {
            $input_errors[] = gettext("This entry cannot be deleted because it is still referenced by a CARP IP with the description") . " {$vip['descr']}.";
        }
    }
    if (count($input_errors) == 0) {
        // Special case since every proxyarp vip is handled by the same daemon.
        if ($a_vip[$id]['mode'] == "proxyarp") {
            $viface = $a_vip[$id]['interface'];
            unset($a_vip[$id]);
            interface_proxyarp_configure($viface);
        } else {
            interface_vip_bring_down($a_vip[$id]);
            unset($a_vip[$id]);
        }
        if (count($config['virtualip']['vip']) == 0) {
            unset($config['virtualip']['vip']);
        }
    }
    return $input_errors;
}