<?php
/*
  Copyright (C) 2014 Deciso B.V.
  Copyright (C) 2011 Seth Mos <seth.mos@dds.nl>.
  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("pfsense-utils.inc");

/**
 * build array with interface options for this form
 */
function formInterfaces() {
    global $config;
    $interfaces = array();
    foreach ( get_configured_interface_with_descr(false, true) as $if => $ifdesc)
        $interfaces[$if] = $ifdesc;

    if (isset($config['l2tp']['mode']) && $config['l2tp']['mode'] == "server")
        $interfaces['l2tp'] = "L2TP VPN";

    if (isset($config['pptpd']['mode']) && $config['pptpd']['mode'] == "server")
        $interfaces['pptp'] = "PPTP VPN";

    if (is_pppoe_server_enabled())
        $interfaces['pppoe'] = "PPPoE VPN";

    /* add ipsec interfaces */
    if (isset($config['ipsec']['enable']) || isset($config['ipsec']['client']['enable']))
        $interfaces["enc0"] = "IPsec";

    /* add openvpn/tun interfaces */
    if (isset($config['openvpn']['openvpn-server']) || isset($config['openvpn']['openvpn-client'])) {
        $interfaces['openvpn'] = 'OpenVPN';
    }
    return $interfaces;
}

if (!isset($config['nat']['npt'])) {
    $config['nat']['npt'] = array();
}
$a_npt = &$config['nat']['npt'];

if ($_SERVER['REQUEST_METHOD'] === 'GET') {
    if (isset($_GET['dup']) && isset($a_npt[$_GET['dup']])) {
        $configId = $_GET['dup'];
        $after = $_GET['dup'];
    } elseif (isset($_GET['id']) && isset($a_npt[$_GET['id']])) {
        $configId = $_GET['id'];
        $id = $configId;
    }

    $pconfig = array();
    // set defaults
    $pconfig['interface'] = "wan";
    if (isset($configId)) {
      // copy 1-to-1 attributes
      foreach (array('disabled','interface','descr') as $fieldname) {
          if (isset($a_npt[$configId][$fieldname])) {
              $pconfig[$fieldname] = $a_npt[$configId][$fieldname];
          }
      }
      // load attributes with some kind of logic
      address_to_pconfig(
          $a_npt[$configId]['source'], $pconfig['src'],$pconfig['srcmask'], $pconfig['srcnot'],
          $pconfig['__unused__'],$pconfig['__unused__']
      );

      address_to_pconfig(
          $a_npt[$configId]['destination'], $pconfig['dst'],$pconfig['dstmask'], $pconfig['dstnot'],
          $pconfig['__unused__'],$pconfig['__unused__']
      );
    }

    // initialize empty form values
    foreach (array('disabled','interface','descr','src','srcmask','dst','dstmask','srcnot','dstnot') as $fieldname) {
        if (!isset($pconfig[$fieldname])) {
            $pconfig[$fieldname] = null;
        }
    }
} elseif ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $input_errors = array();
    $pconfig = $_POST;
    if (isset($pconfig['id']) && isset($a_npt[$pconfig['id']])) {
        $id = $pconfig['id'];
    }

    if (isset($pconfig['after']) && isset($a_npt[$pconfig['after']])) {
        // place record after provided sequence number
        $after = $pconfig['after'];
    }

    /* input validation */
    $reqdfields = explode(" ", "interface");
    $reqdfieldsn = array(gettext("Interface"));
    $reqdfields[] = "src";
    $reqdfieldsn[] = gettext("Source prefix");
    $reqdfields[] = "dst";
    $reqdfieldsn[] = gettext("Destination prefix");

    do_input_validation($pconfig, $reqdfields, $reqdfieldsn, $input_errors);

    if (count($input_errors) == 0) {
      $natent = array();

      $natent['disabled'] = isset($pconfig['disabled']) ? true:false;
      $natent['descr'] = $pconfig['descr'];
      $natent['interface'] = $pconfig['interface'];
      pconfig_to_address(
          $natent['source'], trim($pconfig['src']),$pconfig['srcmask'], !empty($pconfig['srcnot'])
      );

      pconfig_to_address(
          $natent['destination'], trim($pconfig['dst']),$pconfig['dstmask'], !empty($pconfig['dstnot'])
      );

      if (isset($id)) {
          $a_npt[$id] = $natent;
      } elseif (isset($after)) {
          array_splice($a_npt, $after+1, 0, array($natent));
      } else {
          $a_npt[] = $natent;
      }

      if (write_config()) {
          mark_subsystem_dirty('natconf');
      }
      header("Location: firewall_nat_npt.php");
      exit;
    }
}


legacy_html_escape_form_data($pconfig);
$pgtitle = array(gettext('Firewall'), gettext('NAT'), gettext('NPT'), gettext('Edit'));
include("head.inc");

?>

<body>
  <?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($input_errors); ?>
          <section class="col-xs-12">
            <div class="content-box">
              <form action="firewall_nat_npt_edit.php" method="post" name="iform" id="iform">
                <table class="table table-striped">
                  <tr>
                    <td><?=gettext("Edit NAT NPT entry"); ?></td>
                    <td align="right">
                        <small><?=gettext("full help"); ?> </small>
                        <i class="fa fa-toggle-off text-danger"  style="cursor: pointer;" id="show_all_help_page" type="button"></i></a>
                    </td>
                  </tr>
                  <tr>
                    <td><a id="help_for_disabled" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Disabled"); ?></td>
                    <td>
                      <input name="disabled" type="checkbox" id="disabled" value="yes" <?= !empty($pconfig['disabled']) ? "checked=\"checked\"" : ""; ?> />
                      <div class="hidden" for="help_for_disabled">
                        <strong><?=gettext("Disable this rule"); ?></strong><br />
                        <?=gettext("Set this option to disable this rule without removing it from the list."); ?>
                      </div>
                    </td>
                  </tr>
                  <tr>
                    <td><a id="help_for_interface" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Interface"); ?></td>
                    <td>
                      <div class="input-group">
                        <select name="interface" class="selectpicker" data-width="auto" data-live-search="true">
  <?php
                          foreach (formInterfaces() as $iface => $ifacename): ?>
                          <option value="<?=$iface;?>" <?= $iface == $pconfig['interface'] ? "selected=\"selected\"" : ""; ?>>
                            <?=htmlspecialchars($ifacename);?>
                          </option>
                          <?php endforeach; ?>
                        </select>
                      </div>
                      <div class="hidden" for="help_for_interface">
                        <?=gettext("Choose which interface this rule applies to"); ?>.<br />
                        <?=gettext("Hint: in most cases, you'll want to use WAN here"); ?>
                      </div>
                    </td>
                  </tr>
                  <tr>
                      <td colspan="2"><?=gettext("Internal IPv6 Prefix"); ?></td>
                  </tr>
                  <tr>
                      <td><a id="help_for_srcnot" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Source") . " / ".gettext("Invert");?> </td>
                      <td>
                        <input name="srcnot" type="checkbox" value="yes" <?= !empty($pconfig['srcnot']) ? "checked=\"checked\"" :"";?> />
                        <div class="hidden" for="help_for_srcnot">
                            <?=gettext("Use this option to invert the sense of the match."); ?>
                        </div>
                      </td>
                  </tr>
                  <tr>
                    <td><a id="help_for_src" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Source") . " / ". gettext("Address:"); ?></td>
                    <td>
                      <table border="0" cellspacing="0" cellpadding="0">
                        <tr>
                          <td width="348px">
                            <input name="src" type="text" value="<?=$pconfig['src'];?>" aria-label="<?=gettext("Source address");?>"/>
                          </td>
                          <td >
                            <select name="srcmask" class="selectpicker" data-size="5"  data-width="auto">
                              <?php for ($i = 128; $i > 0; $i--): ?>
                                <option value="<?=$i;?>" <?= $i == $pconfig['srcmask'] ? "selected=\"selected\"" : ""; ?>><?=$i;?></option>
                              <?php endfor; ?>
                            </select>
                          </td>
                        </tr>
                      </table>
                      <div class="hidden" for="help_for_src">
                        <?=gettext("Enter the internal (LAN) ULA IPv6 Prefix for the Network Prefix translation. The prefix size specified for the internal IPv6 prefix will be applied to the external prefix.");?>
                      </div>
                    </td>
                  </tr>




                  <tr>
                      <td colspan="2"><?=gettext("Destination IPv6 Prefix"); ?></td>
                  </tr>
                  <tr>
                      <td><a id="help_for_dstnot" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Destination") . " / ".gettext("Invert");?> </td>
                      <td>
                        <input name="dstnot" type="checkbox" value="yes" <?= !empty($pconfig['dstnot']) ? "checked=\"checked\"" :"";?> />
                        <div class="hidden" for="help_for_dstnot">
                            <?=gettext("Use this option to invert the sense of the match."); ?>
                        </div>
                      </td>
                  </tr>
                  <tr>
                    <td><a id="help_for_dst" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Destination") . " / ". gettext("Address:"); ?></td>
                    <td>
                      <table border="0" cellspacing="0" cellpadding="0">
                        <tr>
                          <td width="348px">
                            <input name="dst" type="text" value="<?=$pconfig['dst'];?>" aria-label="<?=gettext("Source address");?>"/>
                          </td>
                          <td >
                            <select name="dstmask" class="selectpicker" data-size="5"  data-width="auto">
                              <?php for ($i = 128; $i > 0; $i--): ?>
                                <option value="<?=$i;?>" <?= $i == $pconfig['dstmask'] ? "selected=\"selected\"" : ""; ?>><?=$i;?></option>
                              <?php endfor; ?>
                            </select>
                          </td>
                        </tr>
                      </table>
                      <div class="hidden" for="help_for_dst">
                        <?=gettext("Enter the Global Unicast routable IPv6 prefix here"); ?>
                      </div>
                    </td>
                  </tr>
                  <tr>
                    <td><a id="help_for_descr" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Description"); ?></td>
                    <td>
                      <input name="descr" type="text" class="formfld unknown" id="descr" size="40" value="<?=$pconfig['descr'];?>" />
                      <div class="hidden" for="help_for_descr">
                        <?=gettext("You may enter a description here " ."for your reference (not parsed)."); ?>
                      </div>
                  </tr>
                  <tr>
                    <td>&nbsp;</td>
                    <td>
                      <input name="Submit" type="submit" class="btn btn-primary" value="<?=gettext("Save"); ?>" />
                      <input type="button" class="btn btn-default" value="<?=gettext("Cancel");?>" onclick="window.location.href='<?=(isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '/firewall_nat_npt.php');?>'" />
                      <?php if (isset($id)): ?>
                        <input name="id" type="hidden" value="<?=htmlspecialchars($id);?>" />
                      <?php endif; ?>
                      <input name="after" type="hidden" value="<?=isset($after) ? $after : "";?>" />
                    </td>
                  </tr>
                </table>
              </div>
            </form>
          </section>
      </div>
    </div>
  </section>

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