wireless/examples/scan-connect-disconnect.js

Tool for handling all aspects of wifi wireless networks

#!/usr/bin/env node

var Wireless = require('../index.js');
var fs = require('fs');

var connected = false;

var iface = process.argv[2];
// The SSID of an open wireless network you'd like to connect to
var SSID = 'xfinitywifi';

if (!iface) {
    console.log("Usage: " + process.argv[1] + " wlan0");
    return;
}

var wireless = new Wireless({
    iface: iface,
    updateFrequency: 12,
    vanishThreshold: 7,
});

console.log("[PROGRESS] Enabling wireless card...");

wireless.enable(function(error) {
    if (error) {
        console.log("[ FAILURE] Unable to enable wireless card. Quitting...");
        return;
    }

    console.log("[PROGRESS] Wireless card enabled.");
    console.log("[PROGRESS] Starting wireless scan...");

    wireless.start();
});

// Found a new network
wireless.on('appear', function(network) {
    var quality = Math.floor(network.quality / 70 * 100);

    var ssid = network.ssid || '<HIDDEN>';

    var encryption_type = 'NONE';
    if (network.encryption_wep) {
        encryption_type = 'WEP';
    } else if (network.encryption_wpa && network.encryption_wpa2) {
        encryption_type = 'WPA&WPA2';
    } else if (network.encryption_wpa) {
        encryption_type = 'WPA';
    } else if (network.encryption_wpa2) {
        encryption_type = 'WPA2';
    }

    console.log("[  APPEAR] " + ssid + " [" + network.address + "] " + quality + "% " + network.strength + " dBm " + encryption_type);

    if (!connected && network.ssid === SSID) {
        connected = true;
        wireless.join(network, '', function(err) {
            if (err) {
                console.log("[   ERROR] Unable to connect.");
                return;
            }

            console.log("Yay, we connected! I will try to get an IP.");
            wireless.dhcp(function(ip_address) {
                console.log("Yay, I got an IP address (" + ip_address + ")! I'm going to disconnect in 20 seconds.");

                setTimeout(function() {
                    console.log("20 seconds are up! Attempting to turn off DHCP...");

                    wireless.dhcpStop(function() {
                        console.log("DHCP has been turned off. Leaving the network...");

                        wireless.leave();
                    });
                }, 20 * 1000);
            });
        });
    }
});

// A network disappeared (after the specified threshold)
wireless.on('vanish', function(network) {
    console.log("[  VANISH] " + network.ssid + " [" + network.address + "] ");
});

// A wireless network changed something about itself
wireless.on('change', function(network) {
    console.log("[  CHANGE] " + network.ssid);
});

wireless.on('signal', function(network) {
    console.log("[  SIGNAL] " + network.ssid);
});

// We've joined a network
wireless.on('join', function(network) {
    console.log("[    JOIN] " + network.ssid + " [" + network.address + "] ");
});

// You were already connected, so it's not technically a join event...
wireless.on('former', function(address) {
    console.log("[OLD JOIN] " + address);
});

// We've left a network
wireless.on('leave', function() {
    console.log("[   LEAVE] Left the network");
});

// Just for debugging purposes
wireless.on('command', function(command) {
    console.log("[ COMMAND] " + command);
});

wireless.on('dhcp', function(ip_address) {
    console.log("[    DHCP] Leased IP " + ip_address);
});

/*
wireless.on('batch', function(networks) {
    console.log("[   BATCH] " + networks);
});
*/

wireless.on('empty', function() {
    console.log("[   EMPTY] Found no networks this scan");
});

wireless.on('error', function(message) {
    console.log("[   ERROR] " + message);
});

// User hit Ctrl + C
var killing_app = false;
process.on('SIGINT', function() {
    console.log("\n");

    if (killing_app) {
        console.log("[PROGRESS] Double SIGINT, Killing without cleanup!");
        process.exit();
    }

    killing_app = true;
    console.log("[PROGRESS] Gracefully shutting down from SIGINT (Ctrl+C)");
    console.log("[PROGRESS] Disabling Adapter...");

    wireless.disable(function() {
        console.log("[PROGRESS] Stopping and Exiting...");

        wireless.stop();
    });
});