added wifi scan for linux

lib/index.js

@@ -31,6 +31,7 @@ const battery = require('./battery');
 const graphics = require('./graphics');
 const filesystem = require('./filesystem');
 const network = require('./network');
+const wifi = require('./wifi');
 const processes = require('./processes');
 const users = require('./users');
 const internet = require('./internet');
@@ -350,6 +351,8 @@ exports.networkInterfaces = network.networkInterfaces;
 exports.networkStats = network.networkStats;
 exports.networkConnections = network.networkConnections;
 
+exports.wifi = wifi.wifi;
+
 exports.services = processes.services;
 exports.processes = processes.processes;
 exports.processLoad = processes.processLoad;

lib/wifi.js

@@ -0,0 +1,96 @@
+'use strict';
+// @ts-check
+// ==================================================================================
+// wifi.js
+// ----------------------------------------------------------------------------------
+// Description:   System Information - library
+//                for Node.js
+// Copyright:     (c) 2014 - 2019
+// Author:        Sebastian Hildebrandt
+// ----------------------------------------------------------------------------------
+// License:       MIT
+// ==================================================================================
+// 9. wifi
+// ----------------------------------------------------------------------------------
+
+const os = require('os');
+const exec = require('child_process').exec;
+const execSync = require('child_process').execSync;
+const fs = require('fs');
+const util = require('./util');
+
+let _platform = process.platform;
+
+const _linux = (_platform === 'linux');
+const _darwin = (_platform === 'darwin');
+const _windows = (_platform === 'win32');
+const _freebsd = (_platform === 'freebsd');
+const _openbsd = (_platform === 'openbsd');
+const _netbsd = (_platform === 'netbsd');
+const _sunos = (_platform === 'sunos');
+
+function wifiDBFromQuality(quality) {
+  return (parseFloat(quality) / 2 - 100);
+}
+
+function wifiQualityFromDB(db) {
+  return 2 * (parseFloat(db) + 100);
+}
+
+function wifi(callback) {
+
+  return new Promise((resolve) => {
+    process.nextTick(() => {
+      let result = [];
+      if (_linux) {
+        let cmd = 'nmcli --terse --fields active,ssid,bssid,mode,chan,freq,signal,security,wpa-flags,rsn-flags device wifi list';
+        exec(cmd, { maxBuffer: 1024 * 2000 }, function (error, stdout) {
+
+          const parts = stdout.toString().split('ACTIVE:');
+          parts.shift();
+          parts.forEach(part => {
+            part = 'ACTIVE:' + part;
+            const lines = part.split(os.EOL);
+            const channel = util.getValue(lines, 'CHAN');
+            const frequency = util.getValue(lines, 'FREQ').toLowerCase().replace('mhz', '').trim()
+            const security = util.getValue(lines, 'SECURITY').replace('(', '').replace(')', '')
+            const wpaFlags = util.getValue(lines, 'WPA-FLAGS').replace('(', '').replace(')', '')
+            const rsnFlags = util.getValue(lines, 'RSN-FLAGS').replace('(', '').replace(')', '')
+            result.push({
+              ssid: util.getValue(lines, 'SSID'),
+              bssid: util.getValue(lines, 'BSSID'),
+              mode: util.getValue(lines, 'MODE'),
+              channel: channel ? parseInt(channel, 10) : -1,
+              frequency: frequency ? parseInt(frequency, 10) : -1,
+              signalLevel: wifiDBFromQuality(util.getValue(lines, 'SIGNAL')),
+              quality: parseFloat(util.getValue(lines, 'SIGNAL')),
+              security: security && security !== 'none' ? security.split(' ') : [],
+              wpaFlags: wpaFlags && wpaFlags !== 'none' ? wpaFlags.split(' ') : [],
+              rsnFlags: rsnFlags && rsnFlags !== 'none' ? rsnFlags.split(' ') : []
+            })
+          })
+
+          if (callback) {
+            callback(result);
+          }
+          resolve(result);
+        });
+      } else if (_darwinx) {
+        let cmd = '';
+        exec(cmd, { maxBuffer: 1024 * 2000 }, function (error, stdout) {
+          if (callback) {
+            callback(result);
+          }
+          resolve(result);
+        });
+      } else {
+        if (callback) {
+          callback(result);
+        }
+        resolve(result);
+      }
+    });
+  });
+}
+
+exports.wifi = wifi;