vpn.inc 54.5 KB
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<?php

/*
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  Copyright (C) 2004 Scott Ullrich
  Copyright (C) 2008 Shrew Soft Inc
  Copyright (C) 2008 Ermal Luçi
  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.
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*/

require_once("ipsec.inc");


/* include all configuration functions */
function vpn_ipsec_convert_to_modp($index)
{

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  $convertion = "";
  switch ($index) {
  case '1':
    $convertion = "modp768";
    break;
  case '2':
    $convertion = "modp1024";
    break;
  case '5':
    $convertion = "modp1536";
    break;
  case '14':
    $convertion = "modp2048";
    break;
  case '15':
    $convertion = "modp3072";
    break;
  case '16':
    $convertion = "modp4096";
    break;
  case '17':
    $convertion = "modp6144";
    break;
  case '18':
    $convertion = "modp8192";
    break;
  }

  return $convertion;
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}

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function vpn_ipsec_configure()
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{
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  global $config, $p2_ealgos, $ipsec_loglevels;
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  /* get the automatic ping_hosts.sh ready */
  @unlink('/var/db/ipsecpinghosts');
  touch('/var/db/ipsecpinghosts');

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  //  Prefer older IPsec SAs (advanced setting)
  if (isset($config['ipsec']['preferoldsa'])) {
    set_single_sysctl("net.key.preferred_oldsa", "-30");
  } else {
    set_single_sysctl("net.key.preferred_oldsa", "0");
  }
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  $syscfg = $config['system'];
  $ipseccfg = $config['ipsec'];
  $a_phase1 = isset($config['ipsec']['phase1']) ? $config['ipsec']['phase1'] : array();
  $a_phase2 = isset($config['ipsec']['phase2']) ? $config['ipsec']['phase2'] : array();
  $a_client = isset($config['ipsec']['client']) ? $config['ipsec']['client'] : array();
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  $aggressive_psk = false ; // if one of the phase 1 entries has aggressive/psk combination, this will be set true
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  if (!isset($ipseccfg['enable'])) {
    /* try to stop charon */
    mwexec('/usr/local/sbin/ipsec stop');
    /* Stop dynamic monitoring */
    killbypid('/var/run/filterdns-ipsec.pid');

    /* wait for process to die */
    sleep(2);

    /* disallow IPSEC, it is off */
    mwexec("/sbin/ifconfig enc0 down");
    set_single_sysctl("net.inet.ip.ipsec_in_use", "0");

    return 0;
  } else {
    $certpath = "/usr/local/etc/ipsec.d/certs";
    $capath = "/usr/local/etc/ipsec.d/cacerts";
    $keypath = "/usr/local/etc/ipsec.d/private";

    mwexec("/sbin/ifconfig enc0 up");
    set_single_sysctl("net.inet.ip.ipsec_in_use", "1");

    /* needed directories for config files */
    @mkdir($capath);
    @mkdir($keypath);
    @mkdir($certpath);
    @mkdir('/usr/local/etc/ipsec.d');
    @mkdir('/usr/local/etc/ipsec.d/crls');
    @mkdir('/usr/local/etc/ipsec.d/aacerts');
    @mkdir('/usr/local/etc/ipsec.d/acerts');
    @mkdir('/usr/local/etc/ipsec.d/ocspcerts');
    @mkdir('/usr/local/etc/ipsec.d/reqs');

    if (file_exists("/var/run/booting"))
      echo gettext("Configuring IPsec VPN... ");

    /* fastforwarding is not compatible with ipsec tunnels */
    set_single_sysctl("net.inet.ip.fastforwarding", "0");

    /* resolve all local, peer addresses and setup pings */
    $ipmap = array();
    $rgmap = array();
    $filterdns_list = array();
    if (is_array($a_phase1) && count($a_phase1)) {

      $ipsecpinghosts = "";
      /* step through each phase1 entry */
      foreach ($a_phase1 as $ph1ent) {
        if (isset($ph1ent['disabled']))
          continue;

        $ikeid = $ph1ent['ikeid'];

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        if ($ph1ent['mode'] == "aggressive" && in_array($ph1ent['authentication_method'], array("pre_shared_key", "xauth_psk_server"))) {
            $aggressive_psk = true;
        }
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        $ep = ipsec_get_phase1_src($ph1ent);
        if (!is_ipaddr($ep))
          continue;

        if(!in_array($ep,$ipmap))
          $ipmap[] = $ep;

        /* see if this tunnel has a hostname for the remote-gateway. If so,
           try to resolve it now and add it to the list for filterdns */

        if (isset ($ph1ent['mobile']))
          continue;

        $rg = $ph1ent['remote-gateway'];

        if (!is_ipaddr($rg)) {
          $filterdns_list[] = "{$rg}";
          add_hostname_to_watch($rg);
          if(! file_exists("/var/run/booting"))
            $rg = resolve_retry($rg);
          if (!is_ipaddr($rg))
            continue;
        }
        if(array_search($rg, $rgmap)) {
          log_error("The remote gateway {$rg} already exists on another phase 1 entry");
          continue;
        }
        $rgmap[$ph1ent['remote-gateway']] = $rg;

        if (isset($a_phase2)) {
          /* step through each phase2 entry */
          foreach ($a_phase2 as $ph2ent) {
            if (isset($ph2ent['disabled'])) {
              continue;
            }

            if ($ikeid != $ph2ent['ikeid']) {
              continue;
            }

            /* add an ipsec pinghosts entry */
            if ($ph2ent['pinghost']) {
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              if (!isset($iflist) || !is_array($iflist)) {
                  $iflist = get_configured_interface_list();
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              }
              $viplist = get_configured_vips_list();
              $srcip = null;
              $local_subnet = ipsec_idinfo_to_cidr($ph2ent['localid'], true, $ph2ent['mode']);
              if(is_ipaddrv6($ph2ent['pinghost'])) {
                foreach ($iflist as $ifent => $ifname) {
                  $interface_ip = get_interface_ipv6($ifent);
                  if (!is_ipaddrv6($interface_ip)) {
                    continue;
                  }
                  if (ip_in_subnet($interface_ip, $local_subnet)) {
                    $srcip = $interface_ip;
                    break;
                  }
                }
              } else {
                foreach ($iflist as $ifent => $ifname) {
                  $interface_ip = get_interface_ip($ifent);
                  if (!is_ipaddrv4($interface_ip)) {
                    continue;
                  }
                  if ($local_subnet == "0.0.0.0/0" || ip_in_subnet($interface_ip, $local_subnet)) {
                    $srcip = $interface_ip;
                    break;
                  }
                }
              }
              /* if no valid src IP was found in configured interfaces, try the vips */
              if (is_null($srcip)) {
                foreach ($viplist as $vip) {
                  if (ip_in_subnet($vip['ipaddr'], $local_subnet)) {
                    $srcip = $vip['ipaddr'];
                    break;
                  }
                }
              }
              $dstip = $ph2ent['pinghost'];
              if(is_ipaddrv6($dstip)) {
                $family = "inet6";
              } else {
                $family = "inet";
              }
              if (is_ipaddr($srcip))
                $ipsecpinghosts[] = "{$srcip}|{$dstip}|3|||||{$family}|\n";
            }
          }
        }
      }
      @file_put_contents('/var/db/ipsecpinghosts', $ipsecpinghosts);
      unset($ipsecpinghosts);
    }
    unset($iflist);

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    $cnf_add_to_charon_section = "";
    $cnf_add_to_charon_section .= $aggressive_psk ? "\ti_dont_care_about_security_and_use_aggressive_mode_psk=yes\n":"";
    if (is_array($a_client) && isset($a_client['enable']) && isset($a_client['net_list'])) {
        $cnf_add_to_charon_section .= "\tcisco_unity = yes\n";
    }

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    $strongswan = <<<EOD
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#Automatically generated please do not modify
starter {
    load_warning = no
}

charon {

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    # number of worker threads in charon
    threads = 16
    ikesa_table_size = 32
    ikesa_table_segments = 4
    init_limit_half_open = 1000;
{$cnf_add_to_charon_section}
    # And two loggers using syslog. The subsections define the facility to log
    # to, currently one of: daemon, auth.
    syslog {
      identifier = charon
      # default level to the LOG_DAEMON facility
      daemon {
      }
      # very minimalistic IKE auditing logs to LOG_AUTHPRIV
      auth {
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        default = -1
        ike = 1
        ike_name = yes
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      }
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    }
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EOD;

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    $strongswan .= "\tplugins {\n";

    if (is_array($a_client) && isset($a_client['enable'])) {
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        $strongswan .= "\t\tattr {\n";
        if ($a_client['pool_address'] && $a_client['pool_netbits']) {
            $strongswan .= "\t\tsubnet = {$a_client['pool_address']}/{$a_client['pool_netbits']}\n";
        }
        $cfgservers = array();
        foreach (array('dns_server1', 'dns_server2', 'dns_server3', 'dns_server4') as $dns_server) {
            if (!empty($a_client[$dns_server])) {
                $cfgservers[] = $a_client[$dns_server];
            }
        }
        if (!empty($cfgservers)) {
            $strongswan .= "\t\tdns = " . implode(",", $cfgservers) . "\n";
        }
        unset($cfgservers);
        $cfgservers = array();
        if (!empty($a_client['wins_server1'])) {
            $cfgservers[] = $a_client['wins_server1'];
        }
        if (!empty($a_client['wins_server2'])) {
            $cfgservers[] = $a_client['wins_server2'];
        }
        if (!empty($cfgservers)) {
            $strongswan .= "\t\tnbns = " . implode(",", $cfgservers) . "\n";
        }
        unset($cfgservers);
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        if (isset($a_client['net_list'])) {
            $net_list = '';
            foreach ($a_phase2 as $ph2ent) {
                if (isset($ph2ent['disabled'])) {
                    continue;
                }
                if (!isset($ph2ent['mobile'])) {
                    continue;
                }
                $localid = ipsec_idinfo_to_cidr($ph2ent['localid'], true, $ph2ent['mode']);
                if (!empty($net_list)) {
                    $net_list .= ",";
                }
                $net_list .= $localid;
            }
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            if (!empty($net_list)) {
                $strongswan .= "\t\tsplit-include = {$net_list}\n";
                unset($net_list);
            }
        }
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        if (!empty($a_client['dns_domain'])) {
            $strongswan .= "\t\t# Search domain and default domain\n";
            $strongswan .= "\t\t28674 = {$a_client['dns_domain']}\n";
            if (empty($a_client['dns_split'])) {
                $strongswan .= "\t\t28675 = {$a_client['dns_domain']}";
            }
            $strongswan .= "\n";
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        }

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        if (!empty($a_client['dns_split'])) {
            $strongswan .= "\t\t28675 = {$a_client['dns_split']}\n";
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        }

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        if (!empty($a_client['login_banner'])) {
            $strongswan .= "\t\t28672 = {$a_client['login_banner']}\n";
        }
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        if (isset($a_client['save_passwd'])) {
            $strongswan .= "\t\t28673 = yes\n";
        }
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        if (!empty($a_client['pfs_group'])) {
            $strongswan .= "\t\t28679 = {$a_client['pfs_group']}\n";
        }
        $strongswan .= "\t\t}\n";

        if ($a_client['user_source'] != "none") {
            $strongswan .= "\txauth-generic {\n";
            $strongswan .= "\t\tscript = /usr/local/etc/inc/ipsec.auth-user.php\n";
            $strongswan .= "\t\tauthcfg = ";
            $firstsed = 0;
            $authcfgs = explode(",", $a_client['user_source']);
            foreach ($authcfgs as $authcfg) {
                if ($firstsed > 0) {
                    $strongswan .= ",";
                }
                if ($authcfg == "system") {
                    $authcfg = "Local Database";
                }
                $strongswan .= $authcfg;
                $firstsed = 1;
            }
            $strongswan .= "\n";
            $strongswan .= "\t}\n";
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        }
    }

    $strongswan .= "\t}\n}\n";
    @file_put_contents("/usr/local/etc/strongswan.conf", $strongswan);
    unset($strongswan);

    /* generate CA certificates files */
    if (isset($config['ca'])) {
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        foreach ($config['ca'] as $ca) {
            if (!isset($ca['crt'])) {
                log_error(sprintf(gettext("Error: Invalid certificate info for %s"), $ca['descr']));
                continue;
            }
            $cert = base64_decode($ca['crt']);
            $x509cert = openssl_x509_parse(openssl_x509_read($cert));
            if (!is_array($x509cert) || !isset($x509cert['hash'])) {
                log_error(sprintf(gettext("Error: Invalid certificate hash info for %s"), $ca['descr']));
                continue;
            }
            $fname = "{$capath}/{$x509cert['hash']}.0.crt";
            if (!@file_put_contents($fname, $cert)) {
                log_error(sprintf(gettext("Error: Cannot write IPsec CA file for %s"), $ca['descr']));
                continue;
            }
            unset($cert);
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        }
    }

    $pskconf = "";

    if (is_array($a_phase1) && count($a_phase1)) {
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        foreach ($a_phase1 as $ph1ent) {
            if (isset($ph1ent['disabled'])) {
                continue;
            }
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            if (strpos($ph1ent['authentication_method'], 'rsa') || $ph1ent['authentication_method'] == 'eap-tls') {
                $certline = '';
                $ikeid = $ph1ent['ikeid'];
                $cert = lookup_cert($ph1ent['certref']);
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                if (empty($cert)) {
                    log_error(sprintf(gettext("Error: Invalid phase1 certificate reference for %s"), $ph1ent['name']));
                    continue;
                }
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                @chmod($certpath, 0600);
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                $ph1keyfile = "{$keypath}/cert-{$ikeid}.key";
                if (!file_put_contents($ph1keyfile, base64_decode($cert['prv']))) {
                  log_error(sprintf(gettext("Error: Cannot write phase1 key file for %s"), $ph1ent['name']));
                  continue;
                }
                @chmod($ph1keyfile, 0600);
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                $ph1certfile = "{$certpath}/cert-{$ikeid}.crt";
                if (!file_put_contents($ph1certfile, base64_decode($cert['crt']))) {
                  log_error(sprintf(gettext("Error: Cannot write phase1 certificate file for %s"), $ph1ent['name']));
                  @unlink($ph1keyfile);
                  continue;
                }
                @chmod($ph1certfile, 0600);
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                /* XXX" Traffic selectors? */
                $pskconf .= " : RSA {$ph1keyfile}\n";
            } else {
                list ($myid_type, $myid_data) = ipsec_find_id($ph1ent, "local");
                list ($peerid_type, $peerid_data) = ipsec_find_id($ph1ent, "peer", $rgmap);
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                if (empty($peerid_data))
                  continue;
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                $myid = isset($ph1ent['mobile']) ? trim($myid_data) . " " : "";
                $peerid = ($peerid_data != "allusers") ? trim($peerid_data) : "";
                if (!empty($ph1ent['pre-shared-key'])) {
                    $pskconf .= $myid . $peerid . " : PSK \"" . trim($ph1ent['pre-shared-key']) . "\"\n";
                }
            }
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        }
    }

    /* Add user PSKs */
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    if (isset($config['system']['user']) && is_array($config['system']['user'])) {
        foreach ($config['system']['user'] as $user) {
            if (!empty($user['ipsecpsk'])) {
                $pskconf .= "{$user['name']} : PSK \"{$user['ipsecpsk']}\"\n";
            }
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        }
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        unset($user);
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    }

    /* add PSKs for mobile clients */
    if (isset($ipseccfg['mobilekey'])) {
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        foreach ($ipseccfg['mobilekey'] as $key) {
            if ($key['ident'] == "allusers") {
                $key['ident'] = '';
            }
            $pskconf .= "{$key['ident']} : PSK \"{$key['pre-shared-key']}\"\n";
        }
        unset($key);
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    }

    @file_put_contents("/usr/local/etc/ipsec.secrets", $pskconf);
    chmod("/usr/local/etc/ipsec.secrets", 0600);
    unset($pskconf);

    $natfilterrules = false;
    /* begin ipsec.conf */
    $ipsecconf = "";
    if (is_array($a_phase1) && count($a_phase1))  {
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        $ipsecconf .= "# This file is automatically generated. Do not edit\n";
        $ipsecconf .= "config setup\n\tuniqueids = yes\n";
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        // parse debug tags
        $cfg_loglevels = array();
        if (isset($ipsec_loglevels)) {
            foreach ($ipsec_loglevels as $lkey => $ldescr) {
                if (isset($config['ipsec']["ipsec_{$lkey}"]) && is_numeric($config['ipsec']["ipsec_{$lkey}"]) &&
                  intval($config['ipsec']["ipsec_{$lkey}"]) >= 1 && intval($config['ipsec']["ipsec_{$lkey}"]) <= 5) {
                      $cfg_loglevels[] = "${lkey} " . (intval($config['ipsec']["ipsec_{$lkey}"]) - 1) ;
                }
            }
        }
        $ipsecconf .= "\tcharondebug=\"" .implode(',', $cfg_loglevels) . "\"\n";
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        foreach ($a_phase1 as $ph1ent) {
            if (isset($ph1ent['disabled'])) {
                continue;
            }
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            if ($ph1ent['mode'] == "aggressive") {
                $aggressive = "yes";
            } else {
                $aggressive = "no";
            }
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            $ep = ipsec_get_phase1_src($ph1ent);
            if (empty($ep)) {
                continue;
            }
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            $ikeid = $ph1ent['ikeid'];
            $keyexchange = "ikev1";
            $passive = "route";
            if (!empty($ph1ent['iketype']) && $ph1ent['iketype'] != "ikev1") {
                $keyexchange = "ikev2";
                //$passive = "start";
            } else {
                $passive = "route";
            }
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            if (isset($ph1ent['mobile'])) {
                $right_spec = "%any";
                $passive = 'add';
            } else {
                $right_spec = $ph1ent['remote-gateway'];
            }
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            list ($myid_type, $myid_data) = ipsec_find_id($ph1ent, "local");
            list ($peerid_type, $peerid_data) = ipsec_find_id($ph1ent, "peer", $rgmap);
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            /* Only specify peer ID if we are not dealing with a mobile PSK-only tunnel */
            $peerid_spec = '';
            if (!isset($ph1ent['mobile'])) {
                $peerid_spec = $peerid_data;
            }
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            if (!empty($ph1ent['encryption-algorithm']['name']) && !empty($ph1ent['hash-algorithm'])) {
                $ealg_id = $ph1ent['encryption-algorithm']['name'];
                if (isset($ph1ent['encryption-algorithm']['keylen'])){
                    $ealgosp1 = "ike = {$ealg_id}{$ph1ent['encryption-algorithm']['keylen']}-{$ph1ent['hash-algorithm']}";
                } else {
                    $ealgosp1 = "ike = {$ealg_id}-{$ph1ent['hash-algorithm']}";
                }
                $modp = vpn_ipsec_convert_to_modp($ph1ent['dhgroup']);
                if (!empty($modp)) {
                    $ealgosp1 .= "-{$modp}";
                }
                $ealgosp1 .= "!";
            }
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            if (!empty($ph1ent['dpd_delay']) && !empty($ph1ent['dpd_maxfail'])) {
                if ($passive == "route") {
                    $dpdline = "dpdaction = restart";
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                } else {
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                    $dpdline = "dpdaction = clear";
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                }
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                $dpdline .= "\n\tdpddelay = {$ph1ent['dpd_delay']}s";
                $dpdtimeout = $ph1ent['dpd_delay'] * ($ph1ent['dpd_maxfail'] + 1);
                $dpdline .= "\n\tdpdtimeout = {$dpdtimeout}s";
            } else {
                $dpdline = "dpdaction = none";
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            }

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            if (!empty($ph1ent['lifetime'])) {
                $ikelifeline = "ikelifetime = {$ph1ent['lifetime']}s";
            } else {
                $ikelifeline = '';
            }
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            $rightsourceip = NULL;
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            if (!empty($a_client['pool_address']) && isset($ph1ent['mobile']) ) {
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                $rightsourceip = "\trightsourceip = {$a_client['pool_address']}/{$a_client['pool_netbits']}\n";
            }

            $authentication = "";
            switch ($ph1ent['authentication_method']) {
                case 'eap-tls':
                    $authentication = "leftauth=eap-tls\n\trightauth=eap-tls";
                    if (!empty($ph1ent['certref'])) {
                        $authentication .= "\n\tleftcert={$certpath}/cert-{$ph1ent['ikeid']}.crt";
                    }
                    break;
                case 'xauth_rsa_server':
                    $authentication = "leftauth = pubkey\n\trightauth = pubkey";
                    $authentication .= "\n\trightauth2 = xauth-generic";
                    break;
                case 'xauth_psk_server':
                    $authentication = "leftauth = psk\n\trightauth = psk";
                    $authentication .= "\n\trightauth2 = xauth-generic";
                    break;
                case 'pre_shared_key':
                    $authentication = "leftauth = psk\n\trightauth = psk";
                    break;
                case 'rsasig':
                    $authentication = "leftauth = pubkey\n\trightauth = pubkey";
                    break;
                case 'hybrid_rsa_server':
                    $authentication = "leftauth = xauth-generic\n\trightauth = pubkey";
                    $authentication .= "\n\trightauth2 = xauth";
                    break;
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            }
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            $left_spec = $ep;
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            if (isset($ph1ent['reauth_enable'])) {
                $reauth = "reauth = no";
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            } else {
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                $reauth = "reauth = yes";
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            }

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            if (isset($ph1ent['rekey_enable'])) {
                $rekey = "rekey = no";
            } else {
                $rekey = "rekey = yes";
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            }

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            $forceencaps = 'forceencaps = no' ;
            if (!empty($ph1ent['nat_traversal']) && $ph1ent['nat_traversal'] == 'force') {
                $forceencaps = 'forceencaps = yes';
            }

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            $ipseclifetime = 0;
            $rightsubnet_spec = array();
            $leftsubnet_spec = array();
            $ealgoAHsp2arr = array();
            $ealgoESPsp2arr = array();
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            if (is_array($a_phase2) && count($a_phase2)) {
                foreach ($a_phase2 as $ph2ent) {
                    if ($ikeid != $ph2ent['ikeid'] || isset($ph2ent['disabled'])) {
                        continue;
                    }
                    if (isset($ph2ent['mobile']) && !isset($a_client['enable'])){
                        continue;
                    }
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                    if (($ph2ent['mode'] == 'tunnel') or ($ph2ent['mode'] == 'tunnel6')) {
                        $tunneltype = "type = tunnel";
                        $localid_type = $ph2ent['localid']['type'];
                        $leftsubnet_data = ipsec_idinfo_to_cidr($ph2ent['localid'], false, $ph2ent['mode']);
                        /* Do not print localid in some cases, such as a pure-psk or psk/xauth single phase2 mobile tunnel */
                        if (($localid_type == "none" || $localid_type == "mobile")
                            && isset($ph1ent['mobile']) && (ipsec_get_number_of_phase2($ikeid)==1)) {
                            $left_spec = '%any';
                        } else {
                            if ($localid_type != "address") {
                                $localid_type = "subnet";
                            }
                            // Don't let an empty subnet into config, it can cause parse errors. Ticket #2201.
                            if (!is_ipaddr($leftsubnet_data) && !is_subnet($leftsubnet_data) && ($leftsubnet_data != "0.0.0.0/0")) {
                                log_error("Invalid IPsec Phase 2 \"{$ph2ent['descr']}\" - {$ph2ent['localid']['type']} has no subnet.");
                                continue;
                            }
                            if (!empty($ph2ent['natlocalid'])) {
                                $natfilterrules = true;
                            }
                        }

                        $leftsubnet_spec[] = $leftsubnet_data;

                        if (!isset($ph2ent['mobile'])) {
                            $tmpsubnet = ipsec_idinfo_to_cidr($ph2ent['remoteid'], false, $ph2ent['mode']);
                            $rightsubnet_spec[] = $tmpsubnet;
                        } else if (!empty($a_client['pool_address'])) {
                            $rightsubnet_spec[] = "{$a_client['pool_address']}/{$a_client['pool_netbits']}";
                        }
                    } else {
                        $tunneltype = "type = transport";
                        if ((($ph1ent['authentication_method'] == "xauth_psk_server") ||
                          ($ph1ent['authentication_method'] == "pre_shared_key")) && isset($ph1ent['mobile'])) {
                            $left_spec = "%any";
                        } else {
                            $tmpsubnet = ipsec_get_phase1_src($ph1ent);
                            $leftsubnet_spec[] = $tmpsubnet;
                        }
                        if (!isset($ph2ent['mobile'])) {
                            $rightsubnet_spec[] = $right_spec;
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                        }
                    }
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                    if (isset($a_client['pfs_group'])) {
                        $ph2ent['pfsgroup'] = $a_client['pfs_group'];
                    }
                    if (isset($ph2ent['protocol']) && $ph2ent['protocol'] == 'esp') {
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                        $ealgoESPsp2arr_details = array();
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                        if (is_array($ph2ent['encryption-algorithm-option'])) {
                            foreach ($ph2ent['encryption-algorithm-option'] as $ealg) {
                                $ealg_id = $ealg['name'];
                                if (isset($ealg['keylen'])) {
                                    $ealg_kl = $ealg['keylen'];
                                } else {
                                    $ealg_kl = null;
                                }

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                                if ($ealg_kl == "auto") {
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                                    $key_hi = $p2_ealgos[$ealg_id]['keysel']['hi'];
                                    $key_lo = $p2_ealgos[$ealg_id]['keysel']['lo'];
                                    $key_step = $p2_ealgos[$ealg_id]['keysel']['step'];
                                    /* XXX: in some cases where include ordering is suspect these variables
                                    * are somehow 0 and we enter this loop forever and timeout after 900
                                    * seconds wrecking bootup */
                                    if ($key_hi != 0 and $key_lo !=0 and $key_step !=0) {
                                        for ($keylen = $key_hi; $keylen >= $key_lo; $keylen -= $key_step) {
                                            if (!empty($ph2ent['hash-algorithm-option']) && is_array($ph2ent['hash-algorithm-option'])) {
                                                foreach ($ph2ent['hash-algorithm-option'] as $halgo) {
                                                    $halgo = str_replace('hmac_', '', $halgo);
                                                    $tmpealgo = "{$ealg_id}{$keylen}-{$halgo}";
                                                    $modp = vpn_ipsec_convert_to_modp($ph2ent['pfsgroup']);
                                                    if (!empty($modp)) {
                                                        $tmpealgo .= "-{$modp}";
                                                    }
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                                                    $ealgoESPsp2arr_details[] = $tmpealgo;
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                                                }
                                            } else {
                                                $tmpealgo = "{$ealg_id}{$keylen}";
                                                $modp = vpn_ipsec_convert_to_modp($ph2ent['pfsgroup']);
                                                if (!empty($modp)) {
                                                    $tmpealgo .= "-{$modp}";
                                                }
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                                                $ealgoESPsp2arr_details[] = $tmpealgo;
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                                            }
                                        }
                                    }
                                } else {
                                    if (!empty($ph2ent['hash-algorithm-option']) && is_array($ph2ent['hash-algorithm-option'])) {
                                        foreach ($ph2ent['hash-algorithm-option'] as $halgo) {
                                            $halgo = str_replace('hmac_', '', $halgo);
                                            $tmpealgo = "{$ealg_id}{$ealg_kl}-{$halgo}";
                                            $modp = vpn_ipsec_convert_to_modp($ph2ent['pfsgroup']);
                                            if (!empty($modp)) {
                                                $tmpealgo .= "-{$modp}";
                                            }
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                                            $ealgoESPsp2arr_details[] = $tmpealgo;
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                                        }
                                    } else {
                                        $tmpealgo = "{$ealg_id}{$ealg_kl}";
                                        $modp = vpn_ipsec_convert_to_modp($ph2ent['pfsgroup']);
                                        if (!empty($modp)) {
                                            $tmpealgo .= "-{$modp}";
                                        }
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                                        $ealgoESPsp2arr_details[] = $tmpealgo;
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                                    }
                                }
                            }
                        }
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                        $ealgoESPsp2arr[] = $ealgoESPsp2arr_details;
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                    } else if (isset($ph2ent['protocol']) && $ph2ent['protocol'] == 'ah') {
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                        $ealgoAHsp2arr_details = array();
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                        if (!empty($ph2ent['hash-algorithm-option']) && is_array($ph2ent['hash-algorithm-option'])) {
                            $modp = vpn_ipsec_convert_to_modp($ph2ent['pfsgroup']);
                            foreach ($ph2ent['hash-algorithm-option'] as $tmpAHalgo) {
                                $tmpAHalgo = str_replace('hmac_', '', $tmpAHalgo);
                                if (!empty($modp)) {
                                    $tmpAHalgo = "-{$modp}";
                                }
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                                $ealgoAHsp2arr_details[] = $tmpAHalgo;
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                            }
                        }
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                        $ealgoAHsp2arr[] = $ealgoAHsp2arr_details;
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                    }

                    if (!empty($ph2ent['lifetime'])) {
                        if ($ipseclifetime == 0 || intval($ipseclifetime) > intval($ph2ent['lifetime'])) {
                            $ipseclifetime = intval($ph2ent['lifetime']);
                        }
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                    }
                }
            }

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            $connEntry =<<<EOD
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conn con<<connectionId>>
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  aggressive = {$aggressive}
  fragmentation = yes
  keyexchange = {$keyexchange}
  {$reauth}
  {$rekey}
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  {$forceencaps}
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  installpolicy = yes
  {$tunneltype}
  {$dpdline}
  auto = {$passive}
  left = {$left_spec}
  right = {$right_spec}
  leftid = {$myid_data}
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  {$ikelifeline}
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EOD;

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            if ($ipseclifetime > 0) {
                $connEntry .= "\tlifetime = {$ipseclifetime}s\n";
            }
            if (!empty($rightsourceip)) {
                $connEntry .= "{$rightsourceip}";
            }
            if (!empty($ealgosp1)) {
                $connEntry .= "\t{$ealgosp1}\n";
            }
            if (!empty($authentication)) {
                $connEntry .= "\t{$authentication}\n";
            }
            if (!empty($peerid_spec)) {
                $connEntry .= "\trightid = {$peerid_spec}\n";
            }

            // append ipsec connections
            if (!isset($ph1ent['mobile']) && $keyexchange == 'ikev1') {
                // ikev1 not mobile
                for ($idx = 0 ; $idx < count($leftsubnet_spec) ; ++$idx) {
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                    if (count($leftsubnet_spec) == 1) {
                        $tmpconf =  str_replace('<<connectionId>>', "{$ph1ent['ikeid']}", $connEntry);
                    } else {
                        // suffix connection with sequence number
                        $tmpconf =  str_replace('<<connectionId>>', "{$ph1ent['ikeid']}-00{$idx}", $connEntry);
                    }
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                    $tmpconf .= "\trightsubnet =" . $rightsubnet_spec[$idx]. "\n" ;
                    $tmpconf .= "\tleftsubnet = " . $leftsubnet_spec[$idx] . "\n";
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                    if (!empty($ealgoESPsp2arr[$idx])) {
                        $tmpconf .= "\tesp = " . join(',', $ealgoESPsp2arr[$idx]) . "!\n";
                    }
                    if (!empty($ealgoAHsp2arr[$idx])) {
                        $connEntry .= "\tah = " . join(',', $ealgoAHsp2arr[$idx]) . "!\n";
                    }
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                    $ipsecconf .= $tmpconf;
                }
            } else {
                // mobile and ikev2
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                $tmpconf =  str_replace('<<connectionId>>', "{$ph1ent['ikeid']}", $connEntry);
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                if (!empty($rightsubnet_spec)) {
                    $tmpconf .= "\trightsubnet = " . join(",", $rightsubnet_spec) . "\n";
                }
                if (!empty($leftsubnet_spec)) {
                    $tmpconf .= "\tleftsubnet = " . join(",", $leftsubnet_spec) . "\n";
                }
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                // merge esp phase 2 arrays.
                $esp_content = array();
                foreach ($ealgoESPsp2arr as $ealgoESPsp2arr_details) {
                    foreach ($ealgoESPsp2arr_details as $esp_item) {
                        if (!in_array($esp_item, $esp_content)) {
                            $esp_content[] = $esp_item;
                        }
                    }
                }
                // merge ah phase 2 arrays.
                $ah_content = array();
                foreach ($ealgoAHsp2arr as $ealgoAHsp2arr_details) {
                    foreach ($ealgoAHsp2arr_details as $ah_item) {
                        if (!in_array($ah_item, $ah_content)) {
                            $ah_content[] = $ah_item;
                        }
                    }
                }
                if (!empty($esp_content)) {
                    $tmpconf .= "\tesp = " . join(',', $esp_content) . "!\n";
                }
                if (!empty($ah_content)) {
                    $tmpconf .= "\tah = " . join(',', $ah_content) . "!\n";
                }
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                $ipsecconf .= $tmpconf;
            }
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        }
    }
  }
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  // dump file, replace tabs for 2 spaces
  @file_put_contents("/usr/local/etc/ipsec.conf", str_replace("\t",'  ', $ipsecconf));
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  unset($ipsecconf);
  /* end ipsec.conf */

  /* mange process */
  if (isvalidpid('/var/run/charon.pid')) {
    /* Read secrets */
    mwexec('/usr/local/sbin/ipsec rereadall', false);
    /* Update configuration changes */
    mwexec('/usr/local/sbin/ipsec reload', false);
  } else {
    mwexec("/usr/local/sbin/ipsec start", false);
  }

  if ($natfilterrules == true) {
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      filter_configure();
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  }

  /* start filterdns, if necessary */
  if (count($filterdns_list) > 0) {
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      $interval = 60;
      if (!empty($ipseccfg['dns-interval']) && is_numeric($ipseccfg['dns-interval'])) {
          $interval = $ipseccfg['dns-interval'];
      }

      $hostnames = "";
      array_unique($filterdns_list);
      foreach ($filterdns_list as $hostname) {
          $hostnames .= "cmd {$hostname} '/usr/local/opnsense/service/configd_ctl.py ipsecdns reload'\n";
      }
      file_put_contents("/usr/local/etc/filterdns-ipsec.hosts", $hostnames);
      unset($hostnames);

      if (isvalidpid('/var/run/filterdns-ipsec.pid')) {
          killbypid('/var/run/filterdns-ipsec.pid', 'HUP');
      } else {
          mwexec("/usr/local/sbin/filterdns -p /var/run/filterdns-ipsec.pid -i {$interval} -c /usr/local/etc/filterdns-ipsec.hosts -d 1");
      }
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  } else {
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      killbypid('/var/run/filterdns-ipsec.pid');
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  }

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  if (file_exists("/var/run/booting")) {
      echo "done\n";
  }
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  return count($filterdns_list);
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}

/*
 * Forcefully restart IPsec
 * This is required for when dynamic interfaces reload
 * For all other occasions the normal vpn_ipsec_configure()
 * will gracefully reload the settings without restarting
 */
function vpn_ipsec_force_reload($interface = "") {
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  global $g, $config;

  $ipseccfg = $config['ipsec'];

  if (!empty($interface) && isset($ipseccfg['phase1']) && is_array($ipseccfg['phase1'])) {
    $found = false;
    foreach ($ipseccfg['phase1'] as $ipsec) {
      if (!isset($ipsec['disabled']) && ($ipsec['interface'] == $interface)) {
        $found = true;
        break;
      }
    }
    if (!$found) {
      log_error(sprintf(gettext("Ignoring IPsec reload since there are no tunnels on interface %s"), $interface));
      return;
    }
  }

  /* if ipsec is enabled, start up again */
  if (isset($ipseccfg['enable'])) {
    log_error(gettext("Forcefully reloading IPsec"));
    vpn_ipsec_configure();
  }
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}

/* master setup for vpn (mpd) */
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function vpn_setup()
{
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  global $g;
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  /* start pptpd */
  vpn_pptpd_configure();
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  /* start pppoe server */
  vpn_pppoes_configure();
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  /* setup l2tp */
  vpn_l2tp_configure();
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}

function vpn_netgraph_support() {
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  $iflist = get_configured_interface_list();
  foreach ($iflist as $iface) {
    $realif = get_real_interface($iface);
    /* Get support for netgraph(4) from the nic */
    $ifinfo = pfSense_get_interface_addresses($realif);
    if (!empty($ifinfo) && in_array($ifinfo['iftype'], array("ether", "vlan", "bridge")))
      pfSense_ngctl_attach(".", $realif);
  }
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}

function vpn_pptpd_configure() {
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  global $config, $g;

  $syscfg = $config['system'];
  $pptpdcfg = $config['pptpd'];

  if (file_exists("/var/run/booting")) {
    if (!$pptpdcfg['mode'] || ($pptpdcfg['mode'] == "off"))
      return 0;

    echo gettext("Configuring PPTP VPN service... ");
  } else {
    /* kill mpd */
    killbypid('/var/run/pptp-vpn.pid');

    /* wait for process to die */
    sleep(3);

    if (is_process_running("mpd -b")) {
      killbypid('/var/run/pptp-vpn.pid');
      log_error(gettext("Could not kill mpd within 3 seconds.   Trying again."));
    }

    /* remove mpd.conf, if it exists */
    @unlink('/var/etc/pptp-vpn/mpd.conf');
    @unlink('/var/etc/pptp-vpn/mpd.links');
    @unlink('/var/etc/pptp-vpn/mpd.secret');
  }

  if (empty($pptpdcfg['n_pptp_units'])) {
    log_error("Something wrong in the PPTPd configuration. Preventing starting the daemon because issues would arise.");
    return;
  }

  /* make sure pptp-vpn directory exists */
  @mkdir('/var/etc/pptp-vpn');

  switch ($pptpdcfg['mode']) {
    case 'server' :
      /* write mpd.conf */
      $fd = fopen('/var/etc/pptp-vpn/mpd.conf', 'w');
      if (!$fd) {
        printf(gettext("Error: cannot open mpd.conf in vpn_pptpd_configure().") . "\n");
        return 1;
      }

      $mpdconf = <<<EOD
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pptps:

EOD;

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      for ($i = 0; $i < $pptpdcfg['n_pptp_units']; $i++) {
        $mpdconf .= "  load pt{$i}\n";
      }
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      for ($i = 0; $i < $pptpdcfg['n_pptp_units']; $i++) {
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        $clientip = long2ip32(ip2long($pptpdcfg['remoteip']) + $i);
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        $mpdconf .= <<<EOD
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pt{$i}:
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  new -i pptpd{$i} pt{$i} pt{$i}
  set ipcp ranges {$pptpdcfg['localip']}/32 {$clientip}/32
  load pts
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EOD;
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      }
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      $mpdconf .=<<<EOD
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pts:
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  set iface disable on-demand
  set iface enable proxy-arp
  set iface enable tcpmssfix
  set iface idle 1800
  set iface up-script /usr/local/sbin/vpn-linkup
  set iface down-script /usr/local/sbin/vpn-linkdown
  set bundle enable multilink
  set bundle enable crypt-reqd
  set link yes acfcomp protocomp
  set link no pap chap
  set link enable chap-msv2
  set link mtu 1460
  set link keep-alive 10 60
  set ipcp yes vjcomp
  set bundle enable compression
  set ccp yes mppc
  set ccp yes mpp-e128
  set ccp yes mpp-stateless
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EOD;

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      if (!isset ($pptpdcfg['req128'])) {
        $mpdconf .=<<<EOD
  set ccp yes mpp-e40
  set ccp yes mpp-e56
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EOD;
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      }

      if  (isset($pptpdcfg["wins"]) && $pptpdcfg['wins'] != "")
        $mpdconf  .=  "  set ipcp nbns {$pptpdcfg['wins']}\n";

      if (!empty($pptpdcfg['dns1'])) {
        $mpdconf .= "  set ipcp dns " . $pptpdcfg['dns1'];
        if (!empty($pptpdcfg['dns2']))
          $mpdconf .= " " . $pptpdcfg['dns2'];
        $mpdconf .= "\n";
      } elseif (isset ($config['dnsmasq']['enable'])) {
        $mpdconf .= "  set ipcp dns " . get_interface_ip("lan");
        if ($syscfg['dnsserver'][0])
          $mpdconf .= " " . $syscfg['dnsserver'][0];
        $mpdconf .= "\n";
      } elseif (isset($config['unbound']['enable'])) {
        $mpdconf .= "  set ipcp dns " . get_interface_ip("lan");
        if ($syscfg['dnsserver'][0])
          $mpdconf .= " " . $syscfg['dnsserver'][0];
        $mpdconf .= "\n";
      } elseif (is_array($syscfg['dnsserver']) && ($syscfg['dnsserver'][0])) {
          $mpdconf .= "  set ipcp dns " . join(" ", $syscfg['dnsserver']) . "\n";
      }

      if (isset ($pptpdcfg['radius']['server']['enable'])) {
        $authport = (isset($pptpdcfg['radius']['server']['port']) && strlen($pptpdcfg['radius']['server']['port']) > 1) ? $pptpdcfg['radius']['server']['port'] : 1812;
        $acctport = $authport + 1;
        $mpdconf .=<<<EOD
  set radius server {$pptpdcfg['radius']['server']['ip']} "{$pptpdcfg['radius']['server']['secret']}" {$authport} {$acctport}
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EOD;
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      if (isset ($pptpdcfg['radius']['server2']['enable'])) {
        $authport = (isset($pptpdcfg['radius']['server2']['port']) && strlen($pptpdcfg['radius']['server2']['port']) > 1) ? $pptpdcfg['radius']['server2']['port'] : 1812;
        $acctport = $authport + 1;
        $mpdconf .=<<<EOD
  set radius server {$pptpdcfg['radius']['server2']['ip']} "{$pptpdcfg['radius']['server2']['secret2']}" {$authport} {$acctport}
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EOD;
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      }
      $mpdconf .=<<<EOD
  set radius retries 3
  set radius timeout 10
  set auth enable radius-auth
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EOD;

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        if (isset ($pptpdcfg['radius']['accounting'])) {
          $mpdconf .=<<<EOD
  set auth enable radius-acct
  set radius acct-update 300
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EOD;
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        }
      }
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      fwrite($fd, $mpdconf);
      fclose($fd);
      unset($mpdconf);
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      /* write mpd.links */
      $fd = fopen('/var/etc/pptp-vpn/mpd.links', 'w');
      if (!$fd) {
        printf(gettext("Error: cannot open mpd.links in vpn_pptpd_configure().") . "\n");
        return 1;
      }
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      $mpdlinks = "";
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      for ($i = 0; $i < $pptpdcfg['n_pptp_units']; $i++) {
        $mpdlinks .=<<<EOD
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pt{$i}:
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  set link type pptp
  set pptp enable incoming
  set pptp disable originate
  set pptp disable windowing
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EOD;
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      }
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      fwrite($fd, $mpdlinks);
      fclose($fd);
      unset($mpdlinks);
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      /* write mpd.secret */
      $fd = fopen('/var/etc/pptp-vpn/mpd.secret', 'w');
      if (!$fd) {
        printf(gettext("Error: cannot open mpd.secret in vpn_pptpd_configure().") . "\n");
        return 1;
      }
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      $mpdsecret = "";
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      if (is_array($pptpdcfg['user'])) {
        foreach ($pptpdcfg['user'] as $user) {
          $pass = str_replace('\\', '\\\\', $user['password']);
          $pass = str_replace('"', '\"', $pass);
          $mpdsecret .= "{$user['name']} \"{$pass}\" {$user['ip']}\n";
        }
      }
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      fwrite($fd, $mpdsecret);
      fclose($fd);
      unset($mpdsecret);
      chmod('/var/etc/pptp-vpn/mpd.secret', 0600);
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      vpn_netgraph_support();
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      /* fire up mpd */
      mwexec('/usr/local/sbin/mpd4 -b -d /var/etc/pptp-vpn -p /var/run/pptp-vpn.pid -s pptps pptps');
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      break;
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    case 'redir' :
      break;
  }
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  if (file_exists("/var/run/booting"))
    echo "done\n";
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  return 0;
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}

function vpn_pppoes_configure() {
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  global $config;
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  if (isset($config['pppoes']['pppoe']) && is_array($config['pppoes']['pppoe'])) {
    foreach ($config['pppoes']['pppoe'] as $pppoe)
      vpn_pppoe_configure($pppoe);
  }
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}

function vpn_pppoe_configure(&$pppoecfg) {
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  global $config, $g;
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  $syscfg = $config['system'];
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  /* create directory if it does not exist */
  @mkdir("/var/etc/pppoe{$pppoecfg['pppoeid']}-vpn");
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  if (file_exists("/var/run/booting")) {
    if (!$pppoecfg['mode'] || ($pppoecfg['mode'] == "off"))
      return 0;
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    echo gettext("Configuring PPPoE VPN service... ");
  } else {
    /* kill mpd */
    killbypid("/var/run/pppoe{$pppoecfg['pppoeid']}-vpn.pid");
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    /* wait for process to die */
    sleep(2);
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  }
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  switch ($pppoecfg['mode']) {
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    case 'server' :
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      $pppoe_interface = get_real_interface($pppoecfg['interface']);
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      if ($pppoecfg['paporchap'] == "chap")
        $paporchap = "set link enable chap";
      else
        $paporchap = "set link enable pap";
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      /* write mpd.conf */
      $fd = fopen("/var/etc/pppoe{$pppoecfg['pppoeid']}-vpn/mpd.conf", "w");
      if (!$fd) {
        printf(gettext("Error: cannot open mpd.conf in vpn_pppoe_configure().") . "\n");
        return 1;
      }
      $mpdconf = "\n\n";
      $mpdconf .= "poes:\n";
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      for ($i = 0; $i < $pppoecfg['n_pppoe_units']; $i++) {
        $mpdconf .= "  load poes{$pppoecfg['pppoeid']}{$i}\n";
      }
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      for ($i = 0; $i < $pppoecfg['n_pppoe_units']; $i++) {
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        $clientip = long2ip32(ip2long($pppoecfg['remoteip']) + $i);
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        if (isset($pppoecfg['radius']['radiusissueips']) && isset($pppoecfg['radius']['server']['enable'])) {
          $isssue_ip_type = "set ipcp ranges {$pppoecfg['localip']}/32 0.0.0.0/0";
        } else {
          $isssue_ip_type = "set ipcp ranges {$pppoecfg['localip']}/32 {$clientip}/32";
        }
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        $mpdconf .=<<<EOD
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poes{$pppoecfg['pppoeid']}{$i}:
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  new -i poes{$pppoecfg['pppoeid']}{$i} poes{$pppoecfg['pppoeid']}{$i} poes{$pppoecfg['pppoeid']}{$i}
  {$isssue_ip_type}
  load pppoe_standard
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EOD;
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      }
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      $mpdconf .=<<<EOD
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pppoe_standard:
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  set bundle no multilink
  set bundle enable compression
  set auth max-logins 1
  set iface up-script /usr/local/sbin/vpn-linkup
  set iface down-script /usr/local/sbin/vpn-linkdown
  set iface idle 0
  set iface disable on-demand
  set iface disable proxy-arp
  set iface enable tcpmssfix
  set iface mtu 1500
  set link no pap chap
  {$paporchap}
  set link keep-alive 60 180
  set ipcp yes vjcomp
  set ipcp no vjcomp
  set link max-redial -1
  set link mtu 1492
  set link mru 1492
  set ccp yes mpp-e40
  set ccp yes mpp-e128
  set ccp yes mpp-stateless
  set link latency 1
  #set ipcp dns 10.10.1.3
  #set bundle accept encryption
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EOD;

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      if (!empty($pppoecfg['dns1'])) {
        $mpdconf .= "  set ipcp dns " . $pppoecfg['dns1'];
        if (!empty($pppoecfg['dns2']))
          $mpdconf .= " " . $pppoecfg['dns2'];
        $mpdconf .= "\n";
      } elseif (isset ($config['dnsmasq']['enable'])) {
        $mpdconf .= "  set ipcp dns " . get_interface_ip("lan");
        if ($syscfg['dnsserver'][0])
          $mpdconf .= " " . $syscfg['dnsserver'][0];
        $mpdconf .= "\n";
      } elseif (isset ($config['unbound']['enable'])) {
        $mpdconf .= "  set ipcp dns " . get_interface_ip("lan");
        if ($syscfg['dnsserver'][0])
          $mpdconf .= " " . $syscfg['dnsserver'][0];
        $mpdconf .= "\n";
      } elseif (is_array($syscfg['dnsserver']) && ($syscfg['dnsserver'][0])) {
          $mpdconf .= "  set ipcp dns " . join(" ", $syscfg['dnsserver']) . "\n";
      }

      if (isset ($pppoecfg['radius']['server']['enable'])) {
        $radiusport = "";
        $radiusacctport = "";
        if (isset($pppoecfg['radius']['server']['port']))
          $radiusport = $pppoecfg['radius']['server']['port'];
        if (isset($pppoecfg['radius']['server']['acctport']))
          $radiusacctport = $pppoecfg['radius']['server']['acctport'];
        $mpdconf .=<<<EOD
  set radius server {$pppoecfg['radius']['server']['ip']} "{$pppoecfg['radius']['server']['secret']}" {$radiusport} {$radiusacctport}
  set radius retries 3
  set radius timeout 10
  set auth enable radius-auth
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EOD;

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        if (isset ($pppoecfg['radius']['accounting'])) {
          $mpdconf .=<<<EOD
  set auth enable radius-acct
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EOD;
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        }
      }
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      fwrite($fd, $mpdconf);
      fclose($fd);
      unset($mpdconf);
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      /* write mpd.links */
      $fd = fopen("/var/etc/pppoe{$pppoecfg['pppoeid']}-vpn/mpd.links", "w");
      if (!$fd) {
        printf(gettext("Error: cannot open mpd.links in vpn_pppoe_configure().") . "\n");
        return 1;
      }
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      $mpdlinks = "";
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      for ($i = 0; $i < $pppoecfg['n_pppoe_units']; $i++) {
        $mpdlinks .=<<<EOD
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poes{$pppoecfg['pppoeid']}{$i}:
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  set phys type pppoe
  set pppoe iface {$pppoe_interface}
  set pppoe service "*"
  set pppoe disable originate
  set pppoe enable incoming
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EOD;
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      }

      fwrite($fd, $mpdlinks);
      fclose($fd);
      unset($mpdlinks);

      if ($pppoecfg['username']) {
        /* write mpd.secret */
        $fd = fopen("/var/etc/pppoe{$pppoecfg['pppoeid']}-vpn/mpd.secret", "w");
        if (!$fd) {
          printf(gettext("Error: cannot open mpd.secret in vpn_pppoe_configure().") . "\n");
          return 1;
        }

        $mpdsecret = "\n\n";

        if (!empty($pppoecfg['username'])) {
          $item = explode(" ", $pppoecfg['username']);
          foreach($item as $userdata) {
            $data = explode(":", $userdata);
            $mpdsecret .= "{$data[0]} \"" . base64_decode($data[1]) . "\" {$data[2]}\n";
          }
        }

        fwrite($fd, $mpdsecret);
        fclose($fd);
        unset($mpdsecret);
        chmod("/var/etc/pppoe{$pppoecfg['pppoeid']}-vpn/mpd.secret", 0600);
      }

      /* Check if previous instance is still up */
      killbypid("/var/run/pppoe{$pppoecfg['pppoeid']}-vpn.pid");

      /* Get support for netgraph(4) from the nic */
      pfSense_ngctl_attach(".", $pppoe_interface);
      /* fire up mpd */
      mwexec("/usr/local/sbin/mpd4 -b -d /var/etc/pppoe{$pppoecfg['pppoeid']}-vpn -p /var/run/pppoe{$pppoecfg['pppoeid']}-vpn.pid -s poes poes");

      break;
  }

  if (file_exists("/var/run/booting"))
    echo gettext("done") . "\n";

  return 0;
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}

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function vpn_l2tp_configure()
{
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  global $config, $g;

  $syscfg = $config['system'];
  if (isset($config['l2tp'])) {
    $l2tpcfg = $config['l2tp'];
  } else {
    return 0;
  }

  if (file_exists("/var/run/booting")) {
    if (!isset($l2tpcfg['mode']) || $l2tpcfg['mode'] == "off")
      return 0;

    echo gettext("Configuring l2tp VPN service... ");
  } else {
    while (isvalidpid('/var/run/l2tp-vpn.pid')) {
      killbypid('/var/run/l2tp-vpn.pid');
      usleep(250 * 1000);
    }
  }

  @mkdir('/var/etc/l2tp-vpn');

  switch (isset($l2tpcfg['mode'])?$l2tpcfg['mode']:null) {

    case 'server' :
      if ($l2tpcfg['paporchap'] == "chap")
        $paporchap = "set link enable chap";
      else
        $paporchap = "set link enable pap";

      /* write mpd.conf */
      $fd = fopen("/var/etc/l2tp-vpn/mpd.conf", "w");
      if (!$fd) {
        printf(gettext("Error: cannot open mpd.conf in vpn_l2tp_configure().") . "\n");
        return 1;
      }
      $mpdconf = "\n\n";
      $mpdconf .=<<<EOD
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l2tps:

EOD;

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      for ($i = 0; $i < $l2tpcfg['n_l2tp_units']; $i++) {
        $mpdconf .= "  load l2tp{$i}\n";
      }
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      for ($i = 0; $i < $l2tpcfg['n_l2tp_units']; $i++) {
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        $clientip = long2ip32(ip2long($l2tpcfg['remoteip']) + $i);
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        if (isset ($l2tpcfg['radius']['radiusissueips']) && isset ($l2tpcfg['radius']['enable'])) {
          $isssue_ip_type = "set ipcp ranges {$l2tpcfg['localip']}/32 0.0.0.0/0";
        } else {
          $isssue_ip_type = "set ipcp ranges {$l2tpcfg['localip']}/32 {$clientip}/32";
        }
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        $mpdconf .=<<<EOD
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l2tp{$i}:
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  new -i l2tp{$i} l2tp{$i} l2tp{$i}
  {$isssue_ip_type}
  load l2tp_standard
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EOD;
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      }
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      $mpdconf .=<<<EOD
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l2tp_standard:
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  set bundle disable multilink
  set bundle enable compression
  set bundle yes crypt-reqd
  set ipcp yes vjcomp
  # set ipcp ranges 131.188.69.161/32 131.188.69.170/28
  set ccp yes mppc
  set iface disable on-demand
  set iface enable proxy-arp
  set iface up-script /usr/local/sbin/vpn-linkup
  set iface down-script /usr/local/sbin/vpn-linkdown
  set link yes acfcomp protocomp
  set link no pap chap
  set link enable chap
  set link keep-alive 10 180
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EOD;

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      if (is_ipaddr($l2tpcfg['wins'])) {
        $mpdconf .= "  set ipcp nbns {$l2tpcfg['wins']}\n";
      }
      if (is_ipaddr($l2tpcfg['dns1'])) {
        $mpdconf .= "  set ipcp dns " . $l2tpcfg['dns1'];
        if (is_ipaddr($l2tpcfg['dns2']))
          $mpdconf .= " " . $l2tpcfg['dns2'];
        $mpdconf .= "\n";
      } elseif (isset ($config['dnsmasq']['enable'])) {
        $mpdconf .= "  set ipcp dns " . get_interface_ip("lan");
        if ($syscfg['dnsserver'][0])
          $mpdconf .= " " . $syscfg['dnsserver'][0];
        $mpdconf .= "\n";
      } elseif (isset ($config['unbound']['enable'])) {
        $mpdconf .= "  set ipcp dns " . get_interface_ip("lan");
        if ($syscfg['dnsserver'][0])
          $mpdconf .= " " . $syscfg['dnsserver'][0];
        $mpdconf .= "\n";
      } elseif (is_array($syscfg['dnsserver']) && ($syscfg['dnsserver'][0])) {
          $mpdconf .= "  set ipcp dns " . join(" ", $syscfg['dnsserver']) . "\n";
      }

      if (isset ($l2tpcfg['radius']['enable'])) {
        $mpdconf .=<<<EOD
  set radius server {$l2tpcfg['radius']['server']} "{$l2tpcfg['radius']['secret']}"
  set radius retries 3
  set radius timeout 10
  set auth enable radius-auth
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EOD;

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        if (isset ($l2tpcfg['radius']['accounting'])) {
          $mpdconf .=<<<EOD
  set auth enable radius-acct
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EOD;
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        }
      }
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      fwrite($fd, $mpdconf);
      fclose($fd);
      unset($mpdconf);
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      /* write mpd.links */
      $fd = fopen("/var/etc/l2tp-vpn/mpd.links", "w");
      if (!$fd) {
        printf(gettext("Error: cannot open mpd.links in vpn_l2tp_configure().") . "\n");
        return 1;
      }
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      $mpdlinks = "";
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      for ($i = 0; $i < $l2tpcfg['n_l2tp_units']; $i++) {
        $mpdlinks .=<<<EOD
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l2tp{$i}:
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  set link type l2tp
  set l2tp enable incoming
  set l2tp disable originate
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EOD;
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      if (!empty($l2tpcfg['secret']))
          $mpdlinks .= "set l2tp secret {$l2tpcfg['secret']}\n";
      }
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      fwrite($fd, $mpdlinks);
      fclose($fd);
      unset($mpdlinks);
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      /* write mpd.secret */
      $fd = fopen("/var/etc/l2tp-vpn/mpd.secret", "w");
      if (!$fd) {
        printf(gettext("Error: cannot open mpd.secret in vpn_l2tp_configure().") . "\n");
        return 1;
      }
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      $mpdsecret = "\n\n";
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      if (is_array($l2tpcfg['user'])) {
        foreach ($l2tpcfg['user'] as $user)
          $mpdsecret .= "{$user['name']} \"{$user['password']}\" {$user['ip']}\n";
      }
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      fwrite($fd, $mpdsecret);
      fclose($fd);
      unset($mpdsecret);
      chmod('/var/etc/l2tp-vpn/mpd.secret', 0600);
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      vpn_netgraph_support();
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      /* fire up mpd */
      mwexec('/usr/local/sbin/mpd4 -b -d /var/etc/l2tp-vpn -p /var/run/l2tp-vpn.pid -s l2tps l2tps');
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      break;
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    case 'redir' :
      break;
  }
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  if (file_exists("/var/run/booting"))
    echo "done\n";
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  return 0;
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}