2019-08-19 17:27:17 +02:00
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<?php
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2020-02-15 18:57:46 +01:00
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require_once 'functions.php';
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2019-08-19 17:27:17 +02:00
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function knownWifiStations(&$networks)
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{
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// Find currently configured networks
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exec(' sudo cat ' . RASPI_WPA_SUPPLICANT_CONFIG, $known_return);
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foreach ($known_return as $line) {
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if (preg_match('/network\s*=/', $line)) {
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$network = array('visible' => false, 'configured' => true, 'connected' => false);
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} elseif ($network !== null) {
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if (preg_match('/^\s*}\s*$/', $line)) {
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$networks[$ssid] = $network;
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$network = null;
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$ssid = null;
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} elseif ($lineArr = preg_split('/\s*=\s*/', trim($line))) {
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switch (strtolower($lineArr[0])) {
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2020-02-15 18:57:46 +01:00
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case 'ssid':
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$ssid = trim($lineArr[1], '"');
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break;
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case 'psk':
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if (array_key_exists('passphrase', $network)) {
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2019-08-19 17:27:17 +02:00
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break;
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2020-02-15 18:57:46 +01:00
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}
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case '#psk':
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$network['protocol'] = 'WPA';
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case 'wep_key0': // Untested
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$network['passphrase'] = trim($lineArr[1], '"');
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break;
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case 'key_mgmt':
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if (! array_key_exists('passphrase', $network) && $lineArr[1] === 'NONE') {
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$network['protocol'] = 'Open';
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}
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break;
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case 'priority':
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$network['priority'] = trim($lineArr[1], '"');
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break;
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2019-08-19 17:27:17 +02:00
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}
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}
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}
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}
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}
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function nearbyWifiStations(&$networks, $cached = true)
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{
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$cacheTime = filemtime(RASPI_WPA_SUPPLICANT_CONFIG);
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$cacheKey = "nearby_wifi_stations_$cacheTime";
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if ($cached == false) {
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deleteCache($cacheKey);
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}
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2020-02-15 18:57:46 +01:00
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$scan_results = cache(
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$cacheKey, function () {
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2020-06-09 16:32:49 +02:00
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exec('sudo wpa_cli -i ' .$_SESSION['ap_interface']. ' scan');
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2020-02-15 18:57:46 +01:00
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sleep(3);
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2019-08-19 17:27:17 +02:00
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2020-06-09 16:32:49 +02:00
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exec('sudo wpa_cli -i ' .$_SESSION['ap_interface']. ' scan_results', $stdout);
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2020-02-15 18:57:46 +01:00
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array_shift($stdout);
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2019-08-19 17:27:17 +02:00
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2020-02-15 18:57:46 +01:00
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return implode("\n", $stdout);
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}
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);
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2019-08-19 17:27:17 +02:00
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2020-05-24 09:24:42 +02:00
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// get the name of the AP. Should be excluded from nearby networks
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exec('cat '.RASPI_HOSTAPD_CONFIG.' | sed -rn "s/ssid=(.*)\s*$/\1/p" ', $ap_ssid);
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2020-05-24 09:14:07 +02:00
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$ap_ssid = $ap_ssid[0];
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2020-05-24 09:24:42 +02:00
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2019-08-19 17:27:17 +02:00
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foreach (explode("\n", $scan_results) as $network) {
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$arrNetwork = preg_split("/[\t]+/", $network); // split result into array
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2020-05-24 09:14:07 +02:00
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if (!array_key_exists(4, $arrNetwork) ||
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2020-05-24 09:24:42 +02:00
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trim($arrNetwork[4]) == $ap_ssid) {
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continue;
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}
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2020-05-24 09:14:07 +02:00
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$ssid = trim($arrNetwork[4]);
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2020-05-24 09:24:42 +02:00
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// filter SSID string: anything invisible in 7bit ASCII or quotes -> ignore network
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2020-06-07 15:29:28 +02:00
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if (preg_match('[\x00-\x1f\x7f-\xff\'\`\´\"]', $ssid)) {
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2020-05-24 09:24:42 +02:00
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continue;
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}
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2019-08-19 17:27:17 +02:00
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// If network is saved
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2020-05-24 09:14:07 +02:00
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if (array_key_exists($ssid, $networks)) {
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$networks[$ssid]['visible'] = true;
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$networks[$ssid]['channel'] = ConvertToChannel($arrNetwork[1]);
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2019-08-19 17:27:17 +02:00
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// TODO What if the security has changed?
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} else {
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2020-05-24 09:14:07 +02:00
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$networks[$ssid] = array(
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2019-08-19 17:27:17 +02:00
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'configured' => false,
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'protocol' => ConvertToSecurity($arrNetwork[3]),
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'channel' => ConvertToChannel($arrNetwork[1]),
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'passphrase' => '',
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'visible' => true,
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'connected' => false
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);
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}
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2020-05-24 09:14:07 +02:00
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// Save RSSI, if the current value is larger than the already stored
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2020-05-24 09:24:42 +02:00
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if (array_key_exists(4, $arrNetwork) && array_key_exists($arrNetwork[4], $networks)) {
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if (! array_key_exists('RSSI', $networks[$arrNetwork[4]]) || $networks[$ssid]['RSSI'] < $arrNetwork[2]) {
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2020-05-24 09:14:07 +02:00
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$networks[$ssid]['RSSI'] = $arrNetwork[2];
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2020-05-24 09:24:42 +02:00
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}
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2019-08-19 17:27:17 +02:00
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}
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}
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}
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function connectedWifiStations(&$networks)
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{
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2020-06-09 16:32:49 +02:00
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exec('iwconfig ' .$_SESSION['ap_interface'], $iwconfig_return);
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2019-08-19 17:27:17 +02:00
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foreach ($iwconfig_return as $line) {
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if (preg_match('/ESSID:\"([^"]+)\"/i', $line, $iwconfig_ssid)) {
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$networks[$iwconfig_ssid[1]]['connected'] = true;
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}
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}
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}
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2020-06-07 18:13:43 +02:00
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2020-05-24 09:24:42 +02:00
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function sortNetworksByRSSI(&$networks)
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{
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$valRSSI = array();
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foreach ($networks as $SSID => $net) {
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if (!array_key_exists('RSSI', $net)) {
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$net['RSSI'] = -1000;
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2020-05-24 09:14:07 +02:00
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}
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2020-05-24 09:24:42 +02:00
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$valRSSI[$SSID] = $net['RSSI'];
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}
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$nets = $networks;
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arsort($valRSSI);
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$networks = array();
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foreach ($valRSSI as $SSID => $RSSI) {
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2020-05-24 09:30:32 +02:00
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$networks[$SSID] = $nets[$SSID];
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2020-05-24 09:24:42 +02:00
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$networks[$SSID]['RSSI'] = $RSSI;
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}
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2020-05-24 09:14:07 +02:00
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}
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2020-06-07 18:20:09 +02:00
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2020-06-09 16:44:21 +02:00
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/*
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* Determines the configured wireless AP interface
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*
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* If not saved in /etc/raspap/hostapd.ini, check for a second
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* wireless interface with iw dev. Fallback to the constant
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* value defined in config.php
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*/
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2020-06-07 18:13:43 +02:00
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function getWifiInterface()
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{
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2020-06-09 16:32:49 +02:00
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if (empty($_SESSION['ap_interface'])) {
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2020-06-07 18:13:43 +02:00
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$arrHostapdConf = parse_ini_file(RASPI_CONFIG.'/hostapd.ini');
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if (isset($arrHostapdConf['WifiInterface'])) {
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2020-06-09 10:15:21 +02:00
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$iface = $arrHostapdConf['WifiInterface'];
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// check for 2nd wifi interface
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exec("iw dev | awk '$1==\"Interface\" && $2!=\"$iface\" {print $2}'",$iface2);
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2020-06-09 16:32:49 +02:00
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$_SESSION['ap_interface'] = empty($iface2) ? $iface : trim($iface2[0]);
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2020-06-07 18:13:43 +02:00
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} else { // fallback to default
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2020-06-09 16:34:19 +02:00
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$_SESSION['ap_interface'] = RASPI_WIFI_AP_INTERFACE;
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2020-06-07 18:13:43 +02:00
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}
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}
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}
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