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tests/node_modules/wireless-tools/iwconfig.js

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+/*
+ * 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().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));
+  }
+}