<?php

/*
  Copyright (C) 2014 Deciso B.V.
  Copyright (C) 2005 Scott Ullrich
  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");

if (!isset($config['aliases']) || !is_array($config['aliases'])) {
    $config['aliases'] = array();
}
if (!isset($config['aliases']['alias'])) {
    $config['aliases']['alias'] = array();
}

if ($_SERVER['REQUEST_METHOD'] === 'GET') {
    // initialize form vars
    $pconfig = array("name" => null, "descr" => null, "aliasimport" => null);
} elseif ($_SERVER['REQUEST_METHOD'] === 'POST') {
    // save form data
    $input_errors =  array();
    $pconfig = $_POST;
    // input validation
    $reqdfields = explode(" ", "name aliasimport");
    $reqdfieldsn = array(gettext("Name"),gettext("Aliases"));

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

    if (is_validaliasname($pconfig['name']) == false) {
        $input_errors[] = gettext("The alias name may only consist of the characters") . " a-z, A-Z, 0-9, _.";
    }

    /* check for name duplicates */
    if (is_alias($pconfig['name'])) {
        $input_errors[] = gettext("An alias with this name already exists.");
    }

    // Add all Load balance names to reserved_keywords
    if (isset($config['load_balancer']['lbpool'])) {
        foreach ($config['load_balancer']['lbpool'] as $lbpool) {
            $reserved_keywords[] = $lbpool['name'];
        }
    }

    // Keywords not allowed in names
    $reserved_keywords = array("all", "pass", "block", "out", "queue", "max", "min", "pptp", "pppoe", "L2TP", "OpenVPN", "IPsec");
    $reserved_ifs = get_configured_interface_list(false, true);
    $reserved_keywords = array_merge($reserved_keywords, $reserved_ifs, $reserved_table_names);
    /* Check for reserved keyword names */
    foreach($reserved_keywords as $rk)
        if ($rk == $pconfig['name'])
            $input_errors[] = sprintf(gettext("Cannot use a reserved keyword as alias name %s"), $rk);

    /* check for name interface description conflicts */
    foreach($config['interfaces'] as $interface) {
        if($interface['descr'] == $pconfig['name']) {
            $input_errors[] = gettext("An interface description with this name already exists.");
            break;
        }
    }

    $imported_ips = array();
    $imported_descs = array();
    foreach (explode("\n", $pconfig['aliasimport']) as $impline) {
        $implinea = explode(" ",trim($impline),2);
        $impip = trim($implinea[0]);
        if (!empty($implinea[1])) {
            // trim and truncate description to max 200 characters
            $impdesc = substr(trim($implinea[1]),0, 200);
        } else {
            // no description given, use alias description
            $impdesc = trim(str_replace('|',' ' , $pconfig['descr']));
        }

        if (strpos($impip,'-') !== false) {
            // ip range provided
            $ipaddr1 = explode('-', $impip)[0];
            $ipaddr2 = explode('-', $impip)[1];
            if (!is_ipaddr($ipaddr1)) {
                $input_errors[] = sprintf(gettext("%s is not an IP address. Please correct the error to continue"), $ipaddr1);
            } elseif (!is_ipaddr($ipaddr2)) {
                $input_errors[] = sprintf(gettext("%s is not an IP address. Please correct the error to continue"), $ipaddr2);
            } else {
                foreach (ip_range_to_subnet_array($ipaddr1, $ipaddr2) as $network) {
                    $imported_ips[] = $network;
                    $imported_descs[] = $impdesc;
                }
            }
        } else {
            // single ip or network
            if (!is_ipaddr($impip) && !is_subnet($impip) && !is_hostname($impip) && !empty($impip)) {
                $input_errors[] = sprintf(gettext("%s is not an IP address. Please correct the error to continue"), $impip);
            } else {
                $imported_ips[] = $impip;
                $imported_descs[] = $impdesc;
            }
        }
    }

    if (count($input_errors) == 0) {
        // create output structure and serialize to config
        $alias = array();
        $alias['address'] = implode(" ", $imported_ips);
        $alias['detail'] = implode("||", $imported_descs);
        $alias['name'] = $pconfig['name'];
        $alias['type'] = "network";
        $alias['descr'] = $pconfig['descr'];
        $config['aliases']['alias'][] = $alias;

        // Sort list
        $config['aliases']['alias'] = msort($config['aliases']['alias'], "name");

        if (write_config()) {
            mark_subsystem_dirty('aliases');
        }
        redirectHeader("firewall_aliases.php");
        exit;
    }
}

$pgtitle = array(gettext("Firewall"),gettext("Aliases"),gettext("Bulk import"));
legacy_html_escape_form_data($pconfig);

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($input_errors); ?>
        <section class="col-xs-12">
          <div class="content-box">
            <header class="content-box-head container-fluid">
          <h3><?=gettext("Alias Import");?></h3>
            </header>
            <div class="content-box-main">
              <form action="firewall_aliases_import.php" method="post" name="iform">
                <table class="table table-striped">
                  <tr>
                    <td colspan="2" align="right">
                      <small><?=gettext("full help"); ?> </small>
                      <i class="fa fa-toggle-off text-danger"  style="cursor: pointer;" id="show_all_help_page" type="button"></i></a>
                    </td>
                  </tr>
                  <tr>
                    <td  width="22%"><a id="help_for_name" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Alias Name"); ?></td>
                    <td  width="78%">
                      <input name="name" type="text" class="form-control unknown" size="40" maxlength="31" value="<?=$pconfig['name'];?>" />
                      <div class="hidden" for="help_for_name">
                        <?=gettext("The name of the alias may only consist of the characters \"a-z, A-Z and 0-9\"."); ?>
                      </div>
                    </td>
                  </tr>
                  <tr>
                    <td><a id="help_for_description" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Description"); ?></td>
                    <td>
                      <input name="descr" type="text" value="<?=$pconfig['descr'];?>" />
                      <div class="hidden" for="help_for_description">
                        <?=gettext("You may enter a description here for your reference (not parsed)"); ?>.
                      </div>
                    </td>
                  </tr>
                  <tr>
                    <td><a id="help_for_alias" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?=gettext("Aliases to import"); ?></td>
                    <td>
                      <textarea name="aliasimport" rows="15" cols="40"><?=$pconfig['aliasimport'];?></textarea>
                      <div class="hidden" for="help_for_alias">
                        <?=gettext("Paste in the aliases to import separated by a carriage return.  Common examples are lists of IPs, networks, blacklists, etc."); ?>
                        <br />
                        <?=gettext("The list may contain IP addresses, with or without CIDR prefix, IP ranges, blank lines (ignored) and an optional description after each IP. e.g.:"); ?>
                        <code>
                          <br/>172.16.1.2
                          <br/>172.16.0.0/24
                          <br/>10.11.12.100-10.11.12.200
                          <br/>192.168.1.254 Home router
                          <br/>10.20.0.0/16 Office network
                          <br/>10.40.1.10-10.40.1.19 Managed switches
                        </code>
                      </div>
                    </td>
                  </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_aliases.php');?>'" />
                    </td>
                  </tr>
                </table>
              </form>
            </div>
          </div>
        </section>
      </div>
    </div>
  </section>
<?php include("foot.inc"); ?>
