iwconfig.js
/*
* Copyright (c) 2015 Christopher M. Baker
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
var child_process = require('child_process');
/**
* The **iwconfig** command is used to configure wireless network interfaces.
*
* @private
* @category iwconfig
*
*/
var iwconfig = module.exports = {
exec: child_process.exec,
status: status
};
/**
* Parses the status for a single wireless network interface.
*
* @private
* @static
* @category iwconfig
* @param {string} block The section of stdout for the interface.
* @returns {object} The parsed wireless network interface status.
*
*/
function parse_status_block(block) {
var match;
// Skip out of the block is invalid
if (!block) return;
var parsed = {
interface: block.match(/^([^\s]+)/)[1]
};
if ((match = block.match(/Access Point:\s*([A-Fa-f0-9:]{17})/))) {
parsed.access_point = match[1].toLowerCase();
}
if ((match = block.match(/Frequency[:|=]\s*([0-9\.]+)/))) {
parsed.frequency = parseFloat(match[1]);
}
if ((match = block.match(/IEEE\s*([^\s]+)/))) {
parsed.ieee = match[1].toLowerCase();
}
if ((match = block.match(/Mode[:|=]\s*([^\s]+)/))) {
parsed.mode = match[1].toLowerCase();
}
if ((match = block.match(/Noise level[:|=]\s*(-?[0-9]+)/))) {
parsed.noise = parseInt(match[1], 10);
}
if ((match = block.match(/Link Quality[:|=]\s*([0-9]+)/))) {
parsed.quality = parseInt(match[1], 10);
}
if ((match = block.match(/Sensitivity[:|=]\s*([0-9]+)/))) {
parsed.sensitivity = parseInt(match[1], 10);
}
if ((match = block.match(/Signal level[:|=]\s*(-?[0-9]+)/))) {
parsed.signal = parseInt(match[1], 10);
}
if ((match = block.match(/ESSID[:|=]\s*"([^"]+)"/))) {
parsed.ssid = match[1];
}
if ((match = block.match(/unassociated/))) {
parsed.unassociated = true;
}
return parsed;
}
/**
* Parses the status for all wireless network interfaces.
*
* @private
* @static
* @category iwconfig
* @param {function} callback The callback function.
*
*/
function parse_status(callback) {
return function(error, stdout, stderr) {
if (error) callback(error);
else callback(error,
stdout.trim().replace(/ {10,}/g, '').split('\n\n').map(parse_status_block).filter(function(i) { return !! i }));
};
}
/**
* Parses the status for a single wireless network interface.
*
* @private
* @static
* @category iwconfig
* @param {function} callback The callback function.
*
*/
function parse_status_interface(callback) {
return function(error, stdout, stderr) {
if (error) callback(error);
else callback(error, parse_status_block(stdout.trim()));
};
}
/**
* Parses the status for a single wireless network interface.
*
* @private
* @static
* @category iwconfig
* @param {string} [interface] The wireless network interface.
* @param {function} callback The callback function.
* @example
*
* var iwconfig = require('wireless-tools/iwconfig');
*
* iwconfig.status(function(err, status) {
* console.log(status);
* });
*
* // =>
* [
* {
* interface: 'wlan0',
* access_point: '00:0b:81:95:12:21',
* frequency: 2.437,
* ieee: '802.11bg',
* mode: 'master',
* noise: 0,
* quality: 77,
* sensitivity: 0,
* signal: 50,
* ssid: 'RaspberryPi'
* },
* {
* interface: 'wlan1',
* frequency: 2.412,
* mode: 'auto',
* noise: 0,
* quality: 0,
* sensitivity: 0,
* signal: 0,
* unassociated: true
* }
* ]
*
*/
function status(interface, callback) {
if (callback) {
return this.exec('iwconfig ' + interface,
parse_status_interface(callback));
}
else {
return this.exec('iwconfig', parse_status(interface));
}
}