false, 'configured' => true, 'connected' => false, 'index' => $index); ++$index; } elseif (isset($network) && $network !== null) { if (preg_match('/^\s*}\s*$/', $line)) { $networks[$ssid] = $network; $network = null; $ssid = null; } elseif ($lineArr = preg_split('/\s*=\s*/', trim($line), 2)) { switch (strtolower($lineArr[0])) { case 'ssid': $ssid = trim($lineArr[1], '"'); $ssid = str_replace('P"','',$ssid); $network['ssid'] = $ssid; break; case 'psk': $network['passkey'] = trim($lineArr[1]); $network['protocol'] = 'WPA'; break; case '#psk': $network['protocol'] = 'WPA'; case 'wep_key0': // Untested $network['passphrase'] = trim($lineArr[1], '"'); break; case 'key_mgmt': if (! array_key_exists('passphrase', $network) && $lineArr[1] === 'NONE') { $network['protocol'] = 'Open'; } break; case 'priority': $network['priority'] = trim($lineArr[1], '"'); break; } } } } } function nearbyWifiStations(&$networks, $cached = true) { $cacheTime = filemtime(RASPI_WPA_SUPPLICANT_CONFIG); $cacheKey = "nearby_wifi_stations_$cacheTime"; if ($cached == false) { deleteCache($cacheKey); } $scan_results = cache( $cacheKey, function () { exec('sudo wpa_cli -i ' .$_SESSION['wifi_client_interface']. ' scan'); sleep(3); $stdout = shell_exec('sudo wpa_cli -i ' .$_SESSION['wifi_client_interface']. ' scan_results'); return preg_split("/\n/", $stdout); } ); // get the name of the AP. Should be excluded from nearby networks exec('cat '.RASPI_HOSTAPD_CONFIG.' | sed -rn "s/ssid=(.*)\s*$/\1/p" ', $ap_ssid); $ap_ssid = $ap_ssid[0]; $index = 0; if ( !empty($networks) ) { $lastnet = end($networks); if ( isset($lastnet['index']) ) $index = $lastnet['index'] + 1; } if (is_array($scan_results)) { array_shift($scan_results); foreach ($scan_results as $network) { $arrNetwork = preg_split("/[\t]+/", $network); // split result into array $ssid = $arrNetwork[4]; // exclude raspap ssid if (empty($ssid) || $ssid == $ap_ssid) { continue; } // filter SSID string: unprintable 7bit ASCII control codes, delete or quotes -> ignore network if (preg_match('[\x00-\x1f\x7f\'\`\ยด\"]', $ssid)) { continue; } // If network is saved if (array_key_exists($ssid, $networks)) { $networks[$ssid]['visible'] = true; $networks[$ssid]['channel'] = ConvertToChannel($arrNetwork[1]); // TODO What if the security has changed? } else { $networks[$ssid] = array( 'ssid' => $ssid, 'configured' => false, 'protocol' => ConvertToSecurity($arrNetwork[3]), 'channel' => ConvertToChannel($arrNetwork[1]), 'passphrase' => '', 'visible' => true, 'connected' => false, 'index' => $index ); ++$index; } // Save RSSI, if the current value is larger than the already stored if (array_key_exists(4, $arrNetwork) && array_key_exists($arrNetwork[4], $networks)) { if (! array_key_exists('RSSI', $networks[$arrNetwork[4]]) || $networks[$ssid]['RSSI'] < $arrNetwork[2]) { $networks[$ssid]['RSSI'] = $arrNetwork[2]; } } } } } function connectedWifiStations(&$networks) { exec('iwconfig ' .$_SESSION['wifi_client_interface'], $iwconfig_return); foreach ($iwconfig_return as $line) { if (preg_match('/ESSID:\"([^"]+)\"/i', $line, $iwconfig_ssid)) { $networks[hexSequence2lower($iwconfig_ssid[1])]['connected'] = true; } } } function sortNetworksByRSSI(&$networks) { $valRSSI = array(); foreach ($networks as $SSID => $net) { if (!array_key_exists('RSSI', $net)) { $net['RSSI'] = -1000; } $valRSSI[$SSID] = $net['RSSI']; } $nets = $networks; arsort($valRSSI); $networks = array(); foreach ($valRSSI as $SSID => $RSSI) { $networks[$SSID] = $nets[$SSID]; $networks[$SSID]['RSSI'] = $RSSI; } } /* * Determines the configured wireless AP interface * * If not saved in /etc/raspap/hostapd.ini, check for a second * wireless interface with iw dev. Fallback to the constant * value defined in config.php */ function getWifiInterface() { $arrHostapdConf = parse_ini_file(RASPI_CONFIG.'/hostapd.ini'); $iface = $_SESSION['ap_interface'] = isset($arrHostapdConf['WifiInterface']) ? $arrHostapdConf['WifiInterface'] : RASPI_WIFI_AP_INTERFACE; // check for 2nd wifi interface -> wifi client on different interface exec("iw dev | awk '$1==\"Interface\" && $2!=\"$iface\" {print $2}'",$iface2); $client_iface = $_SESSION['wifi_client_interface'] = (empty($iface2) ? $iface : trim($iface2[0])); // specifically for rpi0W in AP-STA mode, the above check ends up with the interfaces // crossed over (wifi_client_interface vs 'ap_interface'), because the second interface (uap0) is // created by raspap and used as the access point. if ($client_iface == "uap0" && ($arrHostapdConf['WifiAPEnable'] ?? 0)){ $_SESSION['wifi_client_interface'] = $iface; $_SESSION['ap_interface'] = $client_iface; } } /* * Reinitializes wpa_supplicant for the wireless client interface * The 'force' parameter deletes the socket in /var/run/wpa_supplicant/ * * @param boolean $force */ function reinitializeWPA($force) { if ($force == true) { $cmd = escapeshellcmd("sudo /bin/rm /var/run/wpa_supplicant/".$_SESSION['wifi_client_interface']); $result = exec($cmd); } $cmd = escapeshellcmd("sudo /sbin/wpa_supplicant -B -Dnl80211,wext -c/etc/wpa_supplicant/wpa_supplicant.conf -i". $_SESSION['wifi_client_interface']); $result = shell_exec($cmd); return $result; } /* * Replace escaped bytes (hex) by binary - assume UTF8 encoding * * @param string $ssid */ function ssid2utf8($ssid) { return evalHexSequence($ssid); } /* * Returns a signal strength indicator based on RSSI value * * @param string $rssi */ function getSignalBars($rssi) { // assign css class based on RSSI value if ($rssi >= MAX_RSSI) { $class = 'strong'; } elseif ($rssi >= -56) { $class = 'medium'; } elseif ($rssi >= -67) { $class = 'weak'; } elseif ($rssi >= -89) { $class = ''; } // calculate percent strength if ($rssi >= -50) { $pct = 100; } elseif ($rssi <= MIN_RSSI) { $pct = 0; } else { $pct = 2*($rssi + 100); } $elem = '
'.PHP_EOL; for ($n = 0; $n < 3; $n++ ) { $elem .= '
'.PHP_EOL; } $elem .= '
'.PHP_EOL; return $elem; }