335 lines
7.8 KiB
PHP
Executable File
335 lines
7.8 KiB
PHP
Executable File
<?php
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/* Functions for Networking */
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function mask2cidr($mask)
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{
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$long = ip2long($mask);
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$base = ip2long('255.255.255.255');
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return 32-log(($long ^ $base)+1, 2);
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}
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/* Functions to write ini files */
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function write_php_ini($array, $file)
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{
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$res = array();
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foreach ($array as $key => $val) {
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if (is_array($val)) {
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$res[] = "[$key]";
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foreach ($val as $skey => $sval) {
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$res[] = "$skey = $sval";
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}
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} else {
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$res[] = "$key = $val";
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}
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}
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if (safefilerewrite($file, implode(PHP_EOL, $res))) {
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return true;
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} else {
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return false;
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}
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}
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function safefilerewrite($fileName, $dataToSave)
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{
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if ($fp = fopen($fileName, 'w')) {
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$startTime = microtime(true);
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do {
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$canWrite = flock($fp, LOCK_EX);
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// If lock not obtained sleep for 0 - 100 milliseconds, to avoid collision and CPU load
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if (!$canWrite) {
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usleep(round(rand(0, 100)*1000));
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}
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} while ((!$canWrite)and((microtime(true)-$startTime) < 5));
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//file was locked so now we can store information
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if ($canWrite) {
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fwrite($fp, $dataToSave.PHP_EOL);
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flock($fp, LOCK_UN);
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}
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fclose($fp);
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return true;
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} else {
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return false;
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}
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}
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/**
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* Saves a CSRF token in the session
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*/
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function ensureCSRFSessionToken()
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{
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if (empty($_SESSION['csrf_token'])) {
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$_SESSION['csrf_token'] = bin2hex(random_bytes(32));
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}
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}
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/**
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* Add CSRF Token to form
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*/
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function CSRFTokenFieldTag()
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{
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$token = htmlspecialchars($_SESSION['csrf_token']);
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return '<input type="hidden" name="csrf_token" value="' . $token . '">';
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}
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/**
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* Retuns a CSRF meta tag (for use with xhr, for example)
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*/
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function CSRFMetaTag()
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{
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$token = htmlspecialchars($_SESSION['csrf_token']);
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return '<meta name="csrf_token" content="' . $token . '">';
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}
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/**
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* Validate CSRF Token
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*/
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function CSRFValidate()
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{
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$post_token = $_POST['csrf_token'];
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$header_token = $_SERVER['HTTP_X_CSRF_TOKEN'];
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if (empty($post_token) && empty($header_token)) {
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return false;
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}
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$request_token = $post_token;
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if (empty($post_token)) {
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$request_token = $header_token;
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}
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if (hash_equals($_SESSION['csrf_token'], $request_token)) {
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return true;
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} else {
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error_log('CSRF violation');
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return false;
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}
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}
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/**
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* Should the request be CSRF-validated?
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*/
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function csrfValidateRequest()
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{
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$request_method = strtolower($_SERVER['REQUEST_METHOD']);
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return in_array($request_method, [ "post", "put", "patch", "delete" ]);
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}
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/**
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* Handle invalid CSRF
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*/
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function handleInvalidCSRFToken()
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{
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header('HTTP/1.1 500 Internal Server Error');
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header('Content-Type: text/plain');
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echo 'Invalid CSRF token';
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exit;
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}
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/**
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* Test whether array is associative
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*/
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function isAssoc($arr)
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{
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return array_keys($arr) !== range(0, count($arr) - 1);
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}
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/**
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* Display a selector field for a form. Arguments are:
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*
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* @param string $name: Field name
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* @param array $options: Array of options
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* @param string $selected: Selected option (optional)
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* @param string $id: $options is an associative array this should be the key
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* @param string $event: onChange event (optional)
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* @param string $disabled (optional)
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*/
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function SelectorOptions($name, $options, $selected = null, $id = null, $event = null, $disabled = null)
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{
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echo '<select class="form-control" name="'.htmlspecialchars($name, ENT_QUOTES).'"';
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if (isset($id)) {
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echo ' id="' . htmlspecialchars($id, ENT_QUOTES) .'"';
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}
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if (isset($event)) {
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echo ' onChange="' . htmlspecialchars($event, ENT_QUOTES).'()"';
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}
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echo '>' , PHP_EOL;
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foreach ($options as $opt => $label) {
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$select = '';
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$key = isAssoc($options) ? $opt : $label;
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if ($key == $selected) {
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$select = ' selected="selected"';
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}
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if ($key == $disabled) {
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$disabled = ' disabled';
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}
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echo '<option value="'.htmlspecialchars($key, ENT_QUOTES).'"'.$select.$disabled.'>'.
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htmlspecialchars($label, ENT_QUOTES).'</option>' , PHP_EOL;
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}
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echo '</select>' , PHP_EOL;
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}
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/**
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*
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* @param string $input
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* @param string $string
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* @param int $offset
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* @param string $separator
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* @return $string
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*/
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function GetDistString($input, $string, $offset, $separator)
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{
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$string = substr($input, strpos($input, $string)+$offset, strpos(substr($input, strpos($input, $string)+$offset), $separator));
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return $string;
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}
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/**
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*
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* @param array $arrConfig
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* @return $config
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*/
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function ParseConfig($arrConfig)
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{
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$config = array();
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foreach ($arrConfig as $line) {
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$line = trim($line);
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if ($line == "" || $line[0] == "#") {
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continue;
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}
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list($option, $value) = array_map("trim", explode("=", $line, 2));
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if (empty($config[$option])) {
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$config[$option] = $value ?: true;
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} else {
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if (!is_array($config[$option])) {
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$config[$option] = [ $config[$option] ];
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}
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$config[$option][] = $value;
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}
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}
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return $config;
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}
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/**
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*
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* @param string $freq
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* @return $channel
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*/
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function ConvertToChannel($freq)
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{
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if ($freq >= 2412 && $freq <= 2484) {
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$channel = ($freq - 2407)/5;
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} elseif ($freq >= 4915 && $freq <= 4980) {
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$channel = ($freq - 4910)/5 + 182;
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} elseif ($freq >= 5035 && $freq <= 5865) {
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$channel = ($freq - 5030)/5 + 6;
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} else {
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$channel = -1;
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}
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if ($channel >= 1 && $channel <= 196) {
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return $channel;
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} else {
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return 'Invalid Channel';
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}
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}
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/**
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* Converts WPA security string to readable format
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*
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* @param string $security
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* @return string
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*/
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function ConvertToSecurity($security)
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{
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$options = array();
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preg_match_all('/\[([^\]]+)\]/s', $security, $matches);
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foreach ($matches[1] as $match) {
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if (preg_match('/^(WPA\d?)/', $match, $protocol_match)) {
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$protocol = $protocol_match[1];
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$matchArr = explode('-', $match);
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if (count($matchArr) > 2) {
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$options[] = htmlspecialchars($protocol . ' ('. $matchArr[2] .')', ENT_QUOTES);
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} else {
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$options[] = htmlspecialchars($protocol, ENT_QUOTES);
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}
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}
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}
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if (count($options) === 0) {
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// This could also be WEP but wpa_supplicant doesn't have a way to determine
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// this.
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// And you shouldn't be using WEP these days anyway.
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return 'Open';
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} else {
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return implode(' / ', $options);
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}
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}
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/**
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* Renders a simple PHP template
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*/
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function renderTemplate($name, $data = [])
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{
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$file = realpath(dirname(__FILE__) . "/../templates/$name.php");
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if (!file_exists($file)) {
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return "template $name ($file) not found";
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}
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if (is_array($data)) {
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extract($data);
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}
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ob_start();
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include $file;
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return ob_get_clean();
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}
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function expandCacheKey($key)
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{
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return RASPI_CACHE_PATH . "/" . $key;
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}
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function hasCache($key)
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{
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$cacheKey = expandCacheKey($key);
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return file_exists($cacheKey);
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}
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function readCache($key)
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{
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$cacheKey = expandCacheKey($key);
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if (!file_exists($cacheKey)) {
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return null;
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}
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return file_get_contents($cacheKey);
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}
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function writeCache($key, $data)
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{
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mkdir(RASPI_CACHE_PATH, 0777, true);
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$cacheKey = expandCacheKey($key);
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file_put_contents($cacheKey, $data);
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}
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function deleteCache($key)
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{
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if (hasCache($key)) {
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$cacheKey = expandCacheKey($key);
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unlink($cacheKey);
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}
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}
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function cache($key, $callback)
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{
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if (hasCache($key)) {
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return readCache($key);
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} else {
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$data = $callback();
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writeCache($key, $data);
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return $data;
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}
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}
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