Added the possibility to list bluetooth interfaces. (#20)

* Integrated abilities to bring an interface up and spoof a MAC address.

* Fixed indentation.

* Removed a useless part which brought up an interface before attempting to spoof a MAC address.

* Added the possibility to list bluetooth interfaces.

bin/cmd_btlejuice.js

@@ -57,6 +57,13 @@ parser.addArgument(['-m', '--mac'], {
   help: 'Spoof the MAC address with a new one',
   required: false,
 });
+parser.addArgument(['-l', '--list'], {
+  help: 'List bluetooth interfaces',
+  required: false,
+  action: 'storeTrue',
+  default: false
+});
+
 
 args = parser.parseArgs();
 
@@ -136,6 +143,41 @@ if (args.mac != null && args.iface != null) {
   }
 }
 
+if (args.list) {
+  function display_interface(item) {
+    for (property in item) {
+      console.log(util.format('%s\tType: %s  Bus: %s  BD Address: %s  ' +
+      'ACL MTU: %s  SCO MTU: %s\n\t%s\n\t' +
+      'RX: bytes: %s  ACL: %s  SCO: %s  events: %s  errors: %s\n\t' +
+      'TX: bytes: %s  ACL: %s  SCO: %s  events: %s  errors: %s\n',
+      property,
+      item[property]['Type'],
+      item[property]['Bus'],
+      item[property]['BD Address'],
+      item[property]['ACL MTU'],
+      item[property]['SCO MTU'],
+      item[property]['status'],
+      item[property]['RX']['bytes'],
+      item[property]['RX']['ACL'],
+      item[property]['RX']['SCO'],
+      item[property]['RX']['events'],
+      item[property]['RX']['errors'],
+      item[property]['TX']['bytes'],
+      item[property]['TX']['ACL'],
+      item[property]['TX']['SCO'],
+      item[property]['TX']['events'],
+      item[property]['TX']['errors']).bold);
+    }
+  }
+
+  console.log(util.format('[info] Listing bluetooth interfaces...\n').green);
+  var interfaces = JSON.parse('[' + btim.list() + ']');
+
+  for (var i = 0; i < interfaces.length; i++) {
+    display_interface(interfaces[i]);
+  }
+}
+
 /* Set advertisement interval to minimum value (20ms). */
 process.env.BLENO_ADVERTISING_INTERVAL = 20;