= $pib) { $humanDatasize = ' ('.round($numbytes / $pib, $precision).' PB)'; } elseif ($numbytes >= $tib) { $humanDatasize = ' ('.round($numbytes / $tib, $precision).' TB)'; } elseif ($numbytes >= $gib) { $humanDatasize = ' ('.round($numbytes / $gib, $precision).' GB)'; } elseif ($numbytes >= $mib) { $humanDatasize = ' ('.round($numbytes / $mib, $precision).' MB)'; } elseif ($numbytes >= $kib) { $humanDatasize = ' ('.round($numbytes / $kib, $precision).' KB)'; } return $humanDatasize; } /** * Converts a netmask to CIDR notation string * * @param string $mask * @return string */ function mask2cidr($mask) { $long = ip2long($mask); $base = ip2long('255.255.255.255'); return 32-log(($long ^ $base)+1, 2); } /** * Converts a CIDR notation string to a netmask * * @param string $cidr * @return string */ function cidr2mask($cidr) { $ta = substr ($cidr, strpos ($cidr, '/') + 1) * 1; $netmask = str_split (str_pad (str_pad ('', $ta, '1'), 32, '0'), 8); foreach ($netmask as &$element) $element = bindec ($element); return join ('.', $netmask); } /** * Removes a dhcp configuration block for the specified interface * * @param string $iface * @param object $status * @return boolean $result */ function removeDHCPConfig($iface,$status) { $dhcp_cfg = file_get_contents(RASPI_DHCPCD_CONFIG); $dhcp_cfg = preg_replace('/^#\sRaspAP\s'.$iface.'\s.*?(?=\s*^\s*$)([\s]+)/ms', '', $dhcp_cfg, 1); file_put_contents("/tmp/dhcpddata", $dhcp_cfg); system('sudo cp /tmp/dhcpddata '.RASPI_DHCPCD_CONFIG, $result); if ($result == 0) { $status->addMessage('DHCP configuration for '.$iface.' removed.', 'success'); } else { $status->addMessage('Failed to remove DHCP configuration for '.$iface.'.', 'danger'); return $result; } } /** * Removes a dhcp configuration block for the specified interface * * @param string $dhcp_cfg * @param string $iface * @return string $dhcp_cfg */ function removeDHCPIface($dhcp_cfg,$iface) { $dhcp_cfg = preg_replace('/^#\sRaspAP\s'.$iface.'\s.*?(?=\s*^\s*$)([\s]+)/ms', '', $dhcp_cfg, 1); return $dhcp_cfg; } /** * Removes a dnsmasq configuration block for the specified interface * * @param string $iface * @param object $status * @return boolean $result */ function removeDnsmasqConfig($iface,$status) { system('sudo rm '.RASPI_DNSMASQ_PREFIX.$iface.'.conf', $result); if ($result == 0) { $status->addMessage('Dnsmasq configuration for '.$iface.' removed.', 'success'); } else { $status->addMessage('Failed to remove dnsmasq configuration for '.$iface.'.', 'danger'); } return $result; } /** * Scans dnsmasq configuration dir for the specified interface * Non-matching configs are removed, optional adblock.conf is protected * * @param string $dir_conf * @param string $interface * @param object $status */ function scanConfigDir($dir_conf,$interface,$status) { $syscnf = preg_grep('~\.(conf)$~', scandir($dir_conf)); foreach ($syscnf as $cnf) { if ($cnf !== '090_adblock.conf' && !preg_match('/.*_'.$interface.'.conf/', $cnf)) { system('sudo rm /etc/dnsmasq.d/'.$cnf, $result); } } return $status; } /** * Returns a default (fallback) value for the selected service, interface & setting * from /etc/raspap/networking/defaults.json * * @param string $svc * @param string $iface * @return string $value */ function getDefaultNetValue($svc,$iface,$key) { $json = json_decode(file_get_contents(RASPI_CONFIG_NETWORK), true); if ($json === null) { return false; } else { return $json[$svc][$iface][$key][0]; } } /** * Returns default options for the specified service * * @param string $svc * @return object $json */ function getDefaultNetOpts($svc) { $json = json_decode(file_get_contents(RASPI_CONFIG_NETWORK), true); if ($json === null) { return false; } else { return $json[$svc]['options']; } } /* Functions to write ini files */ /** * Writes a configuration to an .ini file * * @param array $array * @param string $file * @return boolean */ function write_php_ini($array, $file) { $res = array(); foreach ($array as $key => $val) { if (is_array($val)) { $res[] = "[$key]"; foreach ($val as $skey => $sval) { $res[] = "$skey = $sval"; } } else { $res[] = "$key = $val"; } } if (safefilerewrite($file, implode(PHP_EOL, $res))) { return true; } else { return false; } } /** * Writes to a file without conflicts * * @param string $fileName * @param string $dataToSave * @return boolean */ function safefilerewrite($fileName, $dataToSave) { if ($fp = fopen($fileName, 'w')) { $startTime = microtime(true); do { $canWrite = flock($fp, LOCK_EX); // If lock not obtained sleep for 0 - 100 milliseconds, to avoid collision and CPU load if (!$canWrite) { usleep(round(rand(0, 100)*1000)); } } while ((!$canWrite)and((microtime(true)-$startTime) < 5)); //file was locked so now we can store information if ($canWrite) { fwrite($fp, $dataToSave.PHP_EOL); flock($fp, LOCK_UN); } fclose($fp); return true; } else { return false; } } /** * Prepends data to a file if not exists * * @param string $filename * @param string $dataToSave * @return boolean */ function file_prepend_data($filename, $dataToSave) { $context = stream_context_create(); $file = fopen($filename, 'r', 1, $context); $file_data = readfile($file); if (!preg_match('/^'.$dataToSave.'/', $file_data)) { $tmp_file = tempnam(sys_get_temp_dir(), 'php_prepend_'); file_put_contents($tmp_file, $dataToSave); file_put_contents($tmp_file, $file, FILE_APPEND); fclose($file); unlink($filename); rename($tmp_file, $filename); return true; } else { return false; } } /** * Callback function for array_filter * * @param string $var * @return filtered value */ function filter_comments($var) { return $var[0] != '#'; } /** * Saves a CSRF token in the session */ function ensureCSRFSessionToken() { if (empty($_SESSION['csrf_token'])) { $_SESSION['csrf_token'] = bin2hex(random_bytes(32)); } } /** * Add CSRF Token to form */ function CSRFTokenFieldTag() { $token = htmlspecialchars($_SESSION['csrf_token']); return ''; } /** * Retuns a CSRF meta tag (for use with xhr, for example) */ function CSRFMetaTag() { $token = htmlspecialchars($_SESSION['csrf_token']); return ''; } /** * Validate CSRF Token */ function CSRFValidate() { $post_token = $_POST['csrf_token']; $header_token = $_SERVER['HTTP_X_CSRF_TOKEN']; if (empty($post_token) && empty($header_token)) { return false; } $request_token = $post_token; if (empty($post_token)) { $request_token = $header_token; } if (hash_equals($_SESSION['csrf_token'], $request_token)) { return true; } else { error_log('CSRF violation'); return false; } } /** * Should the request be CSRF-validated? */ function csrfValidateRequest() { $request_method = strtolower($_SERVER['REQUEST_METHOD']); return in_array($request_method, [ "post", "put", "patch", "delete" ]); } /** * Handle invalid CSRF */ function handleInvalidCSRFToken() { header('HTTP/1.1 500 Internal Server Error'); header('Content-Type: text/plain'); echo 'Invalid CSRF token'; exit; } /** * Test whether array is associative */ function isAssoc($arr) { return array_keys($arr) !== range(0, count($arr) - 1); } /** * Display a selector field for a form. Arguments are: * * @param string $name: Field name * @param array $options: Array of options * @param string $selected: Selected option (optional) * @param string $id: $options is an associative array this should be the key * @param string $event: onChange event (optional) * @param string $disabled (optional) */ function SelectorOptions($name, $options, $selected = null, $id = null, $event = null, $disabled = null) { echo '' , PHP_EOL; } /** * * @param string $input * @param string $string * @param int $offset * @param string $separator * @return $string */ function GetDistString($input, $string, $offset, $separator) { $string = substr($input, strpos($input, $string)+$offset, strpos(substr($input, strpos($input, $string)+$offset), $separator)); return $string; } /** * * @param array $arrConfig * @return $config */ function ParseConfig($arrConfig) { $config = array(); foreach ($arrConfig as $line) { $line = trim($line); if ($line == "" || $line[0] == "#") { continue; } list($option, $value) = array_map("trim", explode("=", $line, 2)); if (empty($config[$option])) { $config[$option] = $value ?: true; } else { if (!is_array($config[$option])) { $config[$option] = [ $config[$option] ]; } $config[$option][] = $value; } } return $config; } /** * Fetches DHCP configuration for an interface, returned as JSON data * * @param string $interface * @return json $jsonData */ function getNetConfig($interface) { $URI = $_SERVER['REQUEST_SCHEME'].'://'.$_SERVER['SERVER_NAME'] .'/ajax/networking/get_netcfg.php?iface='.$interface; $jsonData = file_get_contents($URI); return $jsonData; } /** * * @param string $freq * @return $channel */ function ConvertToChannel($freq) { if ($freq >= 2412 && $freq <= 2484) { $channel = ($freq - 2407)/5; } elseif ($freq >= 4915 && $freq <= 4980) { $channel = ($freq - 4910)/5 + 182; } elseif ($freq >= 5035 && $freq <= 5865) { $channel = ($freq - 5030)/5 + 6; } else { $channel = -1; } if ($channel >= 1 && $channel <= 196) { return $channel; } else { return 'Invalid Channel'; } } /** * Converts WPA security string to readable format * * @param string $security * @return string */ function ConvertToSecurity($security) { $options = array(); preg_match_all('/\[([^\]]+)\]/s', $security, $matches); foreach ($matches[1] as $match) { if (preg_match('/^(WPA\d?)/', $match, $protocol_match)) { $protocol = $protocol_match[1]; $matchArr = explode('-', $match); if (count($matchArr) > 2) { $options[] = htmlspecialchars($protocol . ' ('. $matchArr[2] .')', ENT_QUOTES); } else { $options[] = htmlspecialchars($protocol, ENT_QUOTES); } } } if (count($options) === 0) { // This could also be WEP but wpa_supplicant doesn't have a way to determine // this. // And you shouldn't be using WEP these days anyway. return 'Open'; } else { return implode(' / ', $options); } } /** * Renders a simple PHP template */ function renderTemplate($name, $__template_data = []) { $file = realpath(dirname(__FILE__) . "/../templates/$name.php"); if (!file_exists($file)) { return "template $name ($file) not found"; } if (is_array($__template_data)) { extract($__template_data); } ob_start(); include $file; return ob_get_clean(); } function expandCacheKey($key) { return RASPI_CACHE_PATH . "/" . $key; } function hasCache($key) { $cacheKey = expandCacheKey($key); return file_exists($cacheKey); } function readCache($key) { $cacheKey = expandCacheKey($key); if (!file_exists($cacheKey)) { return null; } return file_get_contents($cacheKey); } function writeCache($key, $data) { if (!file_exists(RASPI_CACHE_PATH)) { mkdir(RASPI_CACHE_PATH, 0777, true); $cacheKey = expandCacheKey($key); file_put_contents($cacheKey, $data); } } function deleteCache($key) { if (hasCache($key)) { $cacheKey = expandCacheKey($key); unlink($cacheKey); } } function cache($key, $callback) { if (hasCache($key)) { return readCache($key); } else { $data = $callback(); writeCache($key, $data); return $data; } } // insspired by // http://markushedlund.com/dev/php-escapeshellarg-with-unicodeutf-8-support function mb_escapeshellarg($arg) { $isWindows = strtolower(substr(PHP_OS, 0, 3)) === 'win'; if ($isWindows) { $escaped_arg = str_replace(array('"', '%'), '', $arg); } else { $escaped_arg = str_replace("'", "'\\''", $arg); } return "\"$escaped_arg\""; } function dnsServers() { $data = json_decode(file_get_contents("./config/dns-servers.json")); return (array) $data; } function blocklistProviders() { $data = json_decode(file_get_contents("./config/blocklists.json")); return (array) $data; } function optionsForSelect($options) { $html = ""; foreach ($options as $key => $value) { // optgroup if (is_array($value)) { $html .= ""; $html .= optionsForSelect($value); $html .= ""; } // option else { $key = is_int($key) ? $value : $key; $html .= ""; } } return $html; } function blocklistUpdated($file) { $blocklist = RASPI_CONFIG.'/adblock/'.$file; if (file_exists($blocklist)) { $lastModified = date ("F d Y H:i:s.", filemtime($blocklist)); $lastModified = formatDateAgo($lastModified); return $lastModified; } else { return 'Never'; } } function formatDateAgo($datetime, $full = false) { $now = new DateTime; $ago = new DateTime($datetime); $diff = $now->diff($ago); $diff->w = floor($diff->d / 7); $diff->d -= $diff->w * 7; $string = array( 'y' => 'year', 'm' => 'month', 'w' => 'week', 'd' => 'day', 'h' => 'hour', 'i' => 'minute', 's' => 'second', ); foreach ($string as $k => &$v) { if ($diff->$k) { $v = $diff->$k . ' ' . $v . ($diff->$k > 1 ? 's' : ''); } else { unset($string[$k]); } } if (!$full) $string = array_slice($string, 0, 1); return $string ? implode(', ', $string) . ' ago' : 'just now'; } function getThemeOpt() { if (!isset($_COOKIE['theme'])) { $theme = "custom.php"; } else { $theme = $_COOKIE['theme']; } return 'app/css/'.htmlspecialchars($theme, ENT_QUOTES); } function getColorOpt() { if (!isset($_COOKIE['color'])) { $color = "#d8224c"; } else { $color = $_COOKIE['color']; } return $color; } function getSidebarState() { if ($_COOKIE['sidebarToggled'] == 'true' ) { return"toggled"; } } // Returns bridged AP mode status function getBridgedState() { $arrHostapdConf = parse_ini_file(RASPI_CONFIG.'/hostapd.ini'); // defaults to false return $arrHostapdConf['BridgedEnable']; } // Validates a host or FQDN function validate_host($host) { return preg_match('/^([a-z\d](-*[a-z\d])*)(\.([a-z\d](-*[a-z\d])*))*$/i', $host); }