114 lines
2.7 KiB
JavaScript
114 lines
2.7 KiB
JavaScript
/**
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* @typedef {Object} WifiNetwork
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* @property {string} ssid - SSID des WLAN-Netzwerks
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* @property {string} mac - MAC-Adresse des WLAN-Netzwerks
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* @property {number} channel - Kanal des WLAN-Netzwerks
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* @property {number} rssi - Signalstärke des WLAN-Netzwerks (RSSI)
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*/
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/**
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* node-wifi-scanner
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* Created by kc on 04.04.16.
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*/
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const exec = require('child_process').exec;
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const async = require('async');
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const _ = require('lodash');
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// The tools
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const airport = require('./lib/airport');
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const iwlist = require('./lib/iwlist');
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const netsh = require('./lib/netsh');
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let scanner;
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// Initializing the tools
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function initTools(callback) {
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// When a command is not found, an error is issued and async would finish. Therefore we pack
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// the error into the result and check it later on.
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async.parallel([
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function (cb) {
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exec(airport.detector, function (err) {
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cb(null, {err: err, scanner: airport}
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)
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}
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);
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},
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function (cb) {
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exec(iwlist.detector, function (err) {
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cb(null, {err: err, scanner: iwlist}
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)
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}
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);
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},
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function (cb) {
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exec(netsh.detector, function (err) {
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cb(null, {err: err, scanner: netsh}
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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 (err, results) {
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let res = _.find(results,
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function (f) {
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return !f.err
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});
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if (res) {
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return callback(null, res.scanner);
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}
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callback(new Error('No scanner found'));
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}
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);
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}
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/**
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* Scan the networks with the scanner detected before
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* @param {Function|any} callback
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* @param {boolean} useSudo - Use sudo for access?
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*/
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function scanNetworks(callback, useSudo) {
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exec((useSudo ? "sudo ":"") + scanner.cmdLine, function (err, stdout) {
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if (err) {
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callback(err, null);
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return;
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}
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scanner.parseOutput(stdout, callback);
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});
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}
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module.exports = {
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/**
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* Funktion zum Scannen von WLAN-Netzwerken
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* @param {boolean} useSudo? - Defaults to false | Should sudo be used to get the output?
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* @return {Promise<WifiNetwork[]|null>} WiFinetwork Array or null
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* @rejects Returns error on reject
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*/
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scan: function (useSudo = false) {
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return new Promise( (resolve, reject) => {
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if (!scanner) {
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initTools(function (err, s) {
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if (err) {
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return reject(err);
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}
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scanner = s;
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scanNetworks((err, result) => {
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if(err)
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return reject(err);
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resolve(result);
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}, useSudo);
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});
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return;
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}
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scanNetworks((err, result) => {
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if(err)
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return reject(err);
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resolve(result);
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}, useSudo);
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} );
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}
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};
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