<?php

/*
    Copyright (C) 2014-2015 Deciso B.V.
    Copyright (C) 2005 Bill Marquette <bill.marquette@gmail.com>.
    Copyright (C) 2003-2005 Manuel Kasper <mk@neon1.net>.
    Copyright (C) 2004-2005 Scott Ullrich <geekgod@pfsense.com>.
    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");

/**
 * 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;
}

if (!isset($config['virtualip']['vip'])) {
    $config['virtualip']['vip'] = array();
}
$a_vip = &$config['virtualip']['vip'];

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $pconfig = $_POST;
    if (isset($pconfig['id']) && isset($a_vip[$pconfig['id']])) {
        // id found and valid
        $id = $pconfig['id'];
    }
    if (isset($pconfig['apply'])) {
        if (file_exists('/tmp/.firewall_virtual_ip.apply')) {
            $toapplylist = unserialize(file_get_contents('/tmp/.firewall_virtual_ip.apply'));
            foreach ($toapplylist as $vid => $ovip) {
                if (!empty($ovip)) {
                    interface_vip_bring_down($ovip);
                }
                if (!empty($a_vip[$vid])) {
                    switch ($a_vip[$vid]['mode']) {
                      case "ipalias":
                          interface_ipalias_configure($a_vip[$vid]);
                          break;
                      case "proxyarp":
                          interface_proxyarp_configure($a_vip[$vid]['interface']);
                          break;
                      case "carp":
                          interface_carp_configure($a_vip[$vid]);
                          break;
                      default:
                      break;
                    }
                }
            }
            @unlink('/tmp/.firewall_virtual_ip.apply');
        }
        filter_configure();
        $savemsg = get_std_save_message();
        clear_subsystem_dirty('vip');
    } elseif (isset($pconfig['act']) && $pconfig['act'] == 'del' && isset($id)) {
        $input_errors = deleteVIPEntry($id);
        if (count($input_errors) == 0) {
            write_config();
            header("Location: firewall_virtual_ip.php");
            exit;
        }
    }  elseif (isset($pconfig['act']) && $pconfig['act'] == 'del_x' && isset($pconfig['rule']) && count($pconfig['rule']) > 0) {
        // delete selected VIPs, sort rule in reverse order to delete the highest item sequences first
        foreach (array_reverse($pconfig['rule']) as $ruleId) {
            if (isset($a_vip[$ruleId])) {
                deleteVIPEntry($ruleId);
            }
        }
        write_config();
        header("Location: firewall_virtual_ip.php");
        exit;
    }  elseif (isset($pconfig['act']) && $pconfig['act'] == 'move' && isset($pconfig['rule']) && count($pconfig['rule']) > 0) {
        // move selected rules
        if (!isset($id)) {
            // if rule not set/found, move to end
            $id = count($a_vip);
        }
        $a_vip = legacy_move_config_list_items($a_vip, $id,  $pconfig['rule']);
        write_config();
        header("Location: firewall_virtual_ip.php");
        exit;
    }
}

include("head.inc");

$main_buttons = array(
    array('href'=>'firewall_virtual_ip_edit.php', 'label'=>gettext('Add')),
);

?>
<body>
  <script type="text/javascript">
  $( document ).ready(function() {
    // link delete buttons
    $(".act_delete").click(function(){
      var id = $(this).attr("id").split('_').pop(-1);
      // delete single
      BootstrapDialog.show({
        type:BootstrapDialog.TYPE_DANGER,
        title: "<?= gettext("Virtual IP");?>",
        message: "<?=gettext("Do you really want to delete this entry?");?>",
        buttons: [{
                  label: "<?= gettext("No");?>",
                  action: function(dialogRef) {
                      dialogRef.close();
                  }}, {
                  label: "<?= gettext("Yes");?>",
                  action: function(dialogRef) {
                    $("#id").val(id);
                    $("#action").val("del");
                    $("#iform").submit()
                }
              }]
      });
    });

    $("#del_x").click(function(){
      BootstrapDialog.show({
        type:BootstrapDialog.TYPE_DANGER,
        title: "<?= gettext("Rules");?>",
        message: "<?=gettext("Do you really want to delete the selected Virtual IPs?");?>",
        buttons: [{
                  label: "<?= gettext("No");?>",
                  action: function(dialogRef) {
                      dialogRef.close();
                  }}, {
                  label: "<?= gettext("Yes");?>",
                  action: function(dialogRef) {
                    $("#id").val("");
                    $("#action").val("del_x");
                    $("#iform").submit()
                }
              }]
      });
    });

    // link move buttons
    $(".act_move").click(function(){
      var id = $(this).attr("id").split('_').pop(-1);
      $("#id").val(id);
      $("#action").val("move");
      $("#iform").submit();
    });
  });
  </script>
  <?php include("fbegin.inc"); ?>
  <section class="page-content-main">
    <div class="container-fluid">
      <div class="row">
        <?php
          if (isset($input_errors) && count($input_errors) > 0)
            print_input_errors($input_errors);
          else
          if (isset($savemsg))
            print_info_box($savemsg);
          else
          if (is_subsystem_dirty('vip'))
            print_info_box_apply(gettext("The VIP configuration has been changed.")."<br />".gettext("You must apply the changes in order for them to take effect."));
        ?>
        <section class="col-xs-12">
          <div class="content-box tab-content">
            <form action="firewall_virtual_ip.php" method="post" name="iform" id="iform">
              <input type="hidden" id="id" name="id" value="" />
              <input type="hidden" id="action" name="act" value="" />
              <table class="table table-striped">
                <thead>
                  <tr>
                    <td></td>
                    <td><?=gettext("Virtual IP address");?></td>
                    <td><?=gettext("Interface");?></td>
                    <td><?=gettext("Type");?></td>
                    <td><?=gettext("Description");?></td>
                    <td></td>
                  </tr>
                </thead>
                <tbody>
<?php
                  $interfaces = get_configured_interface_with_descr(false, true);
                  $interfaces['lo0'] = "Localhost";
                  $i = 0;
                  foreach ($a_vip as $vipent):
                    if(!empty($vipent['subnet']) || !empty($vipent['range']) || !empty($vipent['subnet_bits']) || (isset($vipent['range']['from']) && !empty($vipent['range']['from']))): ?>
                  <tr ondblclick="document.location='firewall_virtual_ip_edit.php?id=<?=$i;?>';">
                    <td>
                      <input type="checkbox" name="rule[]" value="<?=$i;?>"  />
                    </td>
                    <td>
                      <?=($vipent['type'] == "single" || $vipent['type'] == "network") && !empty($vipent['subnet_bits']) ? $vipent['subnet']."/".$vipent['subnet_bits'] : "";?>
                      <?=$vipent['type'] == "range" ? $vipent['range']['from'] . "-" .  $vipent['range']['to'] : "";?>
                      <?=$vipent['mode'] == "carp" ?  " (vhid {$vipent['vhid']} , freq. {$vipent['advbase']} / {$vipent['advskew']} )" : "";?>
                    </td>
                    <td>
                      <?=htmlspecialchars($interfaces[$vipent['interface']]);?>
                    </td>
                    <td>
                      <?=$vipent['mode'] == "proxyarp" ? "Proxy ARP" : "";?>
                      <?=$vipent['mode'] == "carp" ? "CARP" : "";?>
                      <?=$vipent['mode'] == "other" ? "Other" : "";?>
                      <?=$vipent['mode'] == "ipalias" ? "IP Alias" :"";?>
                    </td>
                    <td>
                      <?=htmlspecialchars($vipent['descr']);?>
                    </td>
                    <td>
                      <a id="move_<?=$i;?>" name="move_<?=$i;?>_x" data-toggle="tooltip" title="<?=gettext("move selected virtual IPs before this entry");?>" class="act_move btn btn-default btn-xs">
                        <span class="glyphicon glyphicon-arrow-left"></span>
                      </a>
                      <a href="firewall_virtual_ip_edit.php?id=<?=$i;?>" data-toggle="tooltip" title="<?=gettext("edit virtual IP");?>" class="btn btn-default btn-xs">
                        <span class="glyphicon glyphicon-pencil"></span>
                      </a>
                      <a id="del_<?=$i;?>" title="<?=gettext("delete virtual IP"); ?>" data-toggle="tooltip"  class="act_delete btn btn-default btn-xs">
                        <span class="fa fa-trash text-muted"></span>
                      </a>
                      <a href="firewall_virtual_ip_edit.php?dup=<?=$i;?>" class="btn btn-default btn-xs" data-toggle="tooltip" title="<?=gettext("clone virtual IP");?>">
                        <span class="fa fa-clone text-muted"></span>
                      </a>
                    </td>
                  </tr>
<?php
                      endif;
                      $i++;
                    endforeach;
                      ?>
                    <?php ?>
                  <tr>
                    <td colspan="5">
                      <?=sprintf(gettext('You can check the status of your CARP Virtual IPs and interfaces %shere%s.'),'<a href="carp_status.php">','</a>')?></span>
                    </td>
                    <td>
                      <a type="submit" id="move_<?=$i;?>" name="move_<?=$i;?>_x" data-toggle="tooltip" title="<?=gettext("move selected virtual IPs to end");?>" class="act_move btn btn-default btn-xs">
                        <span class="glyphicon glyphicon-arrow-left"></span>
                      </a>
                      <a href="firewall_virtual_ip_edit.php" class="btn btn-default btn-xs" data-toggle="tooltip" title="<?=gettext("add new virtual IP");?>">
                        <span class="glyphicon glyphicon-plus"></span>
                      </a>
                      <a id="del_x" title="<?=gettext("delete selected virtual IPs"); ?>" data-toggle="tooltip"  class="btn btn-default btn-xs">
                        <span class="fa fa-trash text-muted"></span>
                      </a>
                    </td>
                  </tr>
                </tbody>
              </table>
            </form>
          </div>
        </section>
      </div>
    </div>
  </section>

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