Fix issue when using useSudo on windows/osx

README.md

@@ -1,4 +1,43 @@
-#node-wifi-scanner
+# Fork of node-wifi-scanner
+
+This fork is used to add the ability to scan as sudo under linux.
+Why the fork?
+
+- Add ability to execute command with prefix 'sudo' to get iwlist working on linux!
+- Uses promise instead of callback in module exports to make it easier and prevent callback hells.
+- Add `encrypted:boolean` to the output, to determine if the network is encrypted (Currently only works under iwlist/linux, otherwise just returns false)
+
+
+To use sudo, just pass `true` to the scan method and it will use sudo.
+For ex.
+```js
+const wifiScan = require("node-wifi-scanner");
+let result = await wifiScan.scan(true);
+```
+
+Beforehand you should add the iwlist scan command to the sudoers file.
+`%mygroup ALL = (root) NOPASSWD: iwlist wlanX scan` [src](https://stackoverflow.com/questions/53710368/how-do-i-add-typescript-types-to-a-javascript-module-without-switching-to-typesc)
+
+
+### Installation
+`yarn add git+https://github.com/Tobstr02/node-wifi-scanner.git`
+or `npm install git+https://github.com/Tobstr02/node-wifi-scanner.git`
+
+
+### Type definitions
+I also tried to add type definitions (see /types/index.d.ts), but as far as i know i did it wrong haha.
+Since this is my first ever module (-fork) i don't really know how to do it. - Let me know in the issues tab or create a pull request :)
+But i added jsdoc to the functions to add the ability to make the coding process a bit cleaner.
+
+
+<br>
+<i>Fork from: [Node-Wifi-Scanner Github](https://github.com/ancasicolica/node-wifi-scanner/)</i>
+
+
+<br><br>
+----
+# Node-Wifi-Scanner
+
 
 [![Build Status](https://travis-ci.org/ancasicolica/node-wifi-scanner.svg?branch=master)](https://travis-ci.org/ancasicolica/node-wifi-scanner)
 [![npm](https://img.shields.io/npm/v/node-wifi-scanner.svg)]()
@@ -16,39 +55,24 @@ system language. The adaptions needed would have been too comprehensive for a pu
 ## Operating Systems
 
 It was tested with the following operating systems:
-* Mac OS-X
-* Windows 10
-* Ubuntu 14.04
-* Raspbian "Jessie"
+* Mac OS-X [Not tested by fork author]
+* Windows 10 [Not tested by fork author]
+* Ubuntu 14.04 [Tested by fork author]
+* Raspbian "Jessie" [Tested by fork author]
 
 ## Installation
 
-    npm i node-wifi-scanner
+    yarn add git+https://git.gaminggeneration.de/tobiash/node-wifi-scanner
 
 ## Usage
 
-### Command Line
-
-Run the script ```scan``` in the bin folder.
-
-### Code
-
-    const scanner = require('node-wifi-scanner');
-
-    scanner.scan((err, networks) => {
-      if (err) {
-        console.error(err);
-        return;
-      }
-      console.log(networks);
-    });
-
 The tool returns an array with objects, each object representing a network with the following properties:
 
 * channel: WiFi channel
 * ssid: SSID of the network (if available)
 * mac: MAC Address of the network access point (if available, otherwise empty string)
 * rssi: signal strength
+* encrypted: boolean - Is network encrypted?
 
 In contrary to other wifi scanners no information about security is returned. This is due to the very different implementation
 of the command line tools which do not allow a flawless detection.
@@ -74,7 +98,7 @@ the operating system. Please note the following restrictions
 before using this tool in a productive system.
 
 **Linux**: iwlist does only return all found networks if run as sudo! Otherwise you'll
-get only the network you're connected to.
+get only the network you're connected to. <i>That's where my fork comes in!!</i>
 
 **Windows**: there are some network cards which do not 
 return the MAC address and other parameters of the found networks. In this case
@@ -86,7 +110,7 @@ card, OS,...) as available. Thanks
 
 The MIT License (MIT)
 
-Copyright (c) 2016 Christian Kuster
+Copyright (c) 2016-2024 Christian Kuster, Tobias Hopp
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

index.js

@@ -1,9 +1,20 @@
 /**
- * node-wifi-scanner
- * Created by kc on 04.04.16.
+ * @typedef {Object} WifiNetwork
+ * @property {string} ssid - SSID of the wifi
+ * @property {string} mac - MAC-Address of the wifi
+ * @property {number} channel - Channel of the wifi
+ * @property {number} rssi - Signalstrength of Wifi-Network (RSSI)
+ * @property {boolean} encrypted - Encrypted
  */
 
-const exec    = require('child_process').exec;
+
+/**
+ * node-wifi-scanner
+ * Created by kc on 04.04.16. - Forked and updated by Tobias Hopp 27.03.2024
+ */
+
+const {exec, spawn}    = require('child_process');
+
 const async   = require('async');
 const _       = require('lodash');
 // The tools
@@ -57,34 +68,76 @@ function initTools(callback) {
 
 /**
  * Scan the networks with the scanner detected before
- * @param callback
+ * @param {Function|any} callback
+ * @param {boolean} useSudo - Use sudo for access?
  */
-function scanNetworks(callback) {
-  exec(scanner.cmdLine, function (err, stdout) {
+function scanNetworks(callback, useSudo) {
+  const cmd = scanner.cmdLine.split(" ");
+  let args = cmd.slice(1);
+  if(useSudo)
+    args.unshift(cmd[0]);
+  const child = spawn(useSudo ? "sudo" : cmd[0], args, { stdio: ['ignore', 'pipe', 'pipe'], detached: true });
+
+  child.on("error", (err) => callback(err, null) );
+
+  let stdoutData = '';
+  child.stdout.on('data', (data) => {
+    stdoutData += data;
+  });
+
+  child.on('close', (code) => {
+    if (code === 0) {
+      // Prozess erfolgreich beendet, Ausgabe verarbeiten
+      scanner.parseOutput(stdoutData, callback);
+    } else {
+      // Prozess mit Fehler beendet
+      callback(new Error(`Exited with code ${code}`), null);
+    }
+  });
+
+  /*exec((useSudo ? "sudo ":"") + scanner.cmdLine, { shell: true }, function (err, stdout) {
     if (err) {
       callback(err, null);
       return;
     }
     scanner.parseOutput(stdout, callback);
-  });
+  });*/
+
 }
 
 module.exports = {
   /**
-   * Scan for wifis
-   * @param callback
-   */
-  scan: function (callback) {
-    if (!scanner) {
-      initTools(function (err, s) {
+ * Scan for wifi networks
+ * @param {boolean} useSudo? - Defaults to false | Should sudo be used to get the output?
+ * @return {Promise<WifiNetwork[]|null>} WiFinetwork Array or null
+ * @rejects Returns error on reject
+ */
+  scan: function (useSudo = false) {
+    return new Promise( (resolve, reject) => {
+      if (!scanner) {
+        initTools(function (err, s) {
         if (err) {
-          return callback(err);
+          return reject(err);
         }
         scanner = s;
-        scanNetworks(callback);
+	scanNetworks((err, result) => {
+        	if(err)
+                	return reject(err);
+		if(!result)
+			result = [];
+        	resolve(result);
+        }, useSudo && scanner == iwlist);
+
       });
       return;
     }
-    scanNetworks(callback);
+    scanNetworks((err, result) => {
+	if(err)
+		return reject(err);
+	if(!result)
+		result = [];
+	resolve(result);
+	}, useSudo && scanner == iwlist);
+    } );
   }
 };

lib/airport.js

@@ -26,7 +26,8 @@ function parseOutput(str, callback) {
         'ssid'   : lines[i].substring(0, 32).trim(),
         'mac'    : '',  // There is no more mac on a mac
         'channel': parseInt(elements[1].trim(), 10),
-        'rssi'   : parseInt(elements[0].trim(), 10)
+        'rssi'   : parseInt(elements[0].trim(), 10),
+      	'encrypted': false,
       });
     }
   }

lib/iwlist.js

@@ -13,6 +13,7 @@ const detector = tool + ' --help';
 
 const macRegex  = /([0-9a-zA-Z]{1}[0-9a-zA-Z]{1}[:]{1}){5}[0-9a-zA-Z]{1}[0-9a-zA-Z]{1}/;
 const cellRegex = /Cell [0-9]{2,} - Address:/;
+const encryptedRegex = /Encryption key:on/g;
 
 /**
  * Parsing the output of iwlist, tool having a lot of different faces :-(
@@ -27,7 +28,8 @@ function parseOutput(str, callback) {
     let blocks = str.split(cellRegex);
 
     blocks.forEach(block => {
-      let network = {};
+      let network = {encrypted: encryptedRegex.test(block)};
+
       let lines   = block.split('\n');
       if (macRegex.exec(lines[0])) {
         // First line is the mac address (always! (?))

lib/netsh.js

@@ -41,7 +41,7 @@ function parseOutput(str, callback) {
     //          Basic rates (MBit/s) : 1 2 5.5 11
     //          Other rates (MBit/s) : 6 9 12 18 24 36 48 54
     for (let i = 1, l = blocks.length; i < l; i++) {
-      let network      = {};
+      let network      = {encrypted: false};
       let lines        = blocks[i].split('\n');
       let regexChannel = /[a-zA-Z0-9()\s]+:[\s]*[0-9]+$/g;
       if (!lines || lines.length < 2) {

package.json

@@ -13,19 +13,18 @@
     "nmcli"
   ],
   "author": {
-    "name": "Christian Kuster, CH-8342 Wernetshausen",
-    "email": "info@kusti.ch",
-    "url": "http://www.kusti.ch/"
+    "name": "Christian Kuster, Tobias Hopp",
+    "email": "tobi@gaminggeneration.de"
   },
-  "homepage": "https://github.com/ancasicolica/node-wifi-scanner",
+  "homepage": "https://git.gaminggeneration.de/TobiasH/node-wifi-scanner/",
   "bugs": {
-    "url": "https://github.com/ancasicolica/node-wifi-scanner/issues",
+    "url": "https://git.gaminggeneration.de/TobiasH/node-wifi-scanner/issues/",
     "email": "info@ancasicolica.ch"
   },
   "license": "MIT",
   "repository": {
     "type": "git",
-    "url": "https://github.com/ancasicolica/node-wifi-scanner.git"
+    "url": "https://git.gaminggeneration.de/TobiasH/node-wifi-scanner.git"
   },
   "engines": {
     "node": ">= 4.0.0",

test/airport.js

@@ -1,67 +0,0 @@
-/**
- * Airport unit test
- * Created by kc on 04.04.16.
- */
-
-const fs = require('fs');
-const path = require('path');
-const assert = require('assert');
-
-const airport = require('../lib/airport');
-
-describe('airport', () => {
-  it('parses the output of file 1', function(done) {
-    airport.parseOutput(fs.readFileSync(path.join(__dirname, 'fixtures','airport','airport01.txt'), { encoding: 'utf8' }), (err, info) => {
-
-      assert.ok(info);
-      assert.equal(info.length, 36);
-
-      let ap = info[0];
-      assert.equal(ap.mac, '');
-      assert.equal(ap.ssid, 'OurTest');
-      assert.equal(ap.rssi, -70);
-      assert.strictEqual(ap.channel, 112);
-
-      ap = info[19];
-      assert.equal(ap.mac, '00:35:1a:5b:45:b6');
-      assert.equal(ap.ssid, 'PDANet1');
-      assert.equal(ap.rssi, -78);
-      assert.strictEqual(ap.channel, 11);
-
-      ap = info[25];
-      assert.equal(ap.mac, '10:bd:18:ab:4d:8f');
-      assert.equal(ap.ssid, 'TEST Training');
-      assert.equal(ap.rssi, -71);
-      assert.strictEqual(ap.channel, 6);
-
-      ap = info[35];
-      assert.equal(ap.mac, '00:35:1a:90:56:00');
-      assert.equal(ap.ssid, 'TEST-Wifi');
-      assert.equal(ap.rssi, -67);
-      assert.strictEqual(ap.channel, 1);
-
-      done(err);
-    });
-  });
-
-  it('parses the output of file 2', function(done) {
-    airport.parseOutput(fs.readFileSync(path.join(__dirname, 'fixtures','airport','airport02.txt'), { encoding: 'utf8' }), (err, info) => {
-      assert.ok(info);
-      assert.equal(info.length, 4);
-
-      let ap = info[0];
-      assert.equal(ap.mac, '7c:b7:33:ae:3b:06');
-      assert.equal(ap.ssid, 'Raupo');
-      assert.equal(ap.rssi, -80);
-      assert.strictEqual(ap.channel, 64);
-
-      ap = info[3];
-      assert.equal(ap.mac, '7c:b7:33:ae:3b:04');
-      assert.equal(ap.ssid, 'Visitor Raupo');
-      assert.equal(ap.rssi, -66);
-      assert.strictEqual(ap.channel, 9);
-
-      done(err);
-    });
-  });
-});

types/index.d.ts

@@ -0,0 +1,41 @@
+declare module 'node-wifi-scanner' {
+    type Callback<T> = (error: Error | null, result: T | null) => void;
+
+    interface WifiNetwork {
+        ssid: string;
+        mac: string;
+        channel: number;
+        rssi: number;
+    }
+
+    interface Scanner {
+        cmdLine: string;
+        parseOutput(output: string, callback: Callback<WifiNetwork[]>): void;
+    }
+
+    interface Tool {
+        detector: string;
+    }
+
+    const airport: Tool;
+    const iwlist: Tool;
+    const netsh: Tool;
+
+    /**
+     * Initialize the scanner tools
+     * @param callback Callback function
+     */
+    function initTools(callback: Callback<Scanner>): void;
+
+    /**
+     * Scan the networks
+     * @param callback Callback function
+     */
+    function scanNetworks(callback: Callback<WifiNetwork[]>): void;
+
+    /**
+     * Scan for WiFi networks
+     * @param callback Callback function
+     */
+    function scan(callback: Callback<WifiNetwork[]>): void;
+}