function check_backend_login()
{
if (!empty($_SESSION['USER_ID']) and $_SESSION['USER_LEVEL'] <= 3 and userInfo()) {
load_themes();
} else {
$_SESSION['USER'] = null;
$_SESSION['USER_ID'] = null;
$_SESSION['USER_LOG'] = null;
$_SESSION['USER_NAME'] = null;
$_SESSION['USER_EMAIL'] = null;
$_SESSION['USER_LEVEL'] = null;
load_login();
}
}
/**
* get forwarded port from PIA
* @global object $_files
* @return int,boolean integer with port number or boolean false on failure
*/
function get_port()
{
global $_files;
if ($_SESSION['connecting2'] == '') {
return '';
}
//get provider from connectin2
$provider = explode('/', $_SESSION['connecting2']);
$filename = VPN_get_loginfile($provider[0]);
if (!preg_match("/^\\/pia\\/login-[a-zA-Z]{3,10}\\.conf+\\z/", $filename)) {
throw new Exception('FATAL ERROR: invalid login file name - ' . $filename);
}
//get username and password from file or SESSION
if (array_key_exists($filename, $_SESSION) !== true) {
if (load_login($filename) === false) {
return false;
}
}
//get the client ID
if (array_key_exists('client_id', $_SESSION) !== true) {
$c = $_files->readfile('/pia/client_id');
if ($c !== false) {
if (mb_strlen($c) < 1) {
return false;
}
$_SESSION['client_id'] = $c;
//store for later
} else {
return false;
}
}
$PIA_UN = urlencode($_SESSION[$filename]['username']);
$PIA_PW = urlencode($_SESSION[$filename]['password']);
$PIA_CLIENT_ID = urlencode(trim($_SESSION['client_id']));
$ret = array();
exec('/sbin/ip addr show tun0 2>/dev/null | grep -w "inet" | gawk -F" " \'{print $2}\' | cut -d/ -f1', $ret);
if (array_key_exists('0', $ret) !== true) {
//VPN is down, can not continue to check for open ports
return false;
} else {
$TUN_IP = $ret[0];
}
//combine vars to submit as avPOST request
$post_vars = "user={$PIA_UN}&pass={$PIA_PW}&client_id={$PIA_CLIENT_ID}&local_ip={$TUN_IP}";
// setup cURL resource
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://www.privateinternetaccess.com/vpninfo/port_forward_assignment');
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13');
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, count(explode('&', $post_vars)));
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_vars);
curl_setopt($ch, CURLOPT_TIMEOUT, 4);
//max runtime for CURL
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 4);
//only the connection timeout
$curl_timeout = strtotime('-10 minutes');
//time until timeout lock expires
if (array_key_exists('PIA_port_timeout', $_SESSION) === true) {
//validate time
if ($_SESSION['PIA_port_timeout'] < $curl_timeout) {
//echo 'debug: ran curl after timeout';
$curl_ret = curl_exec($ch);
} else {
//echo 'debug: lock still good';
return false;
}
} else {
//echo 'debug: ran curl';
$curl_ret = curl_exec($ch);
}
if ($curl_ret === false) {
//timeout or connection error, preventing retrying with every request
//echo 'debug: curl failed, setting timeout';
$_SESSION['PIA_port_timeout'] = strtotime('now');
} else {
//worked
if (array_key_exists('PIA_port_timeout', $_SESSION) === true) {
unset($_SESSION['PIA_port_timeout']);
}
}
// grab URL and pass it to the browser
$return = json_decode(curl_exec($ch), true);
curl_close($ch);
return $return;
}
