Merge pull request #302 from michaelarnauts/dev

Add Aruba Access Point device tracker

homeassistant/components/device_tracker/aruba.py

@@ -0,0 +1,154 @@
+"""
+homeassistant.components.device_tracker.aruba
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Device tracker platform that supports scanning a Aruba Access Point for device
+presence.
+
+This device tracker needs telnet to be enabled on the router.
+
+Configuration:
+
+To use the Aruba tracker you will need to add something like the following
+to your config/configuration.yaml. You also need to enable Telnet in the
+configuration pages.
+
+device_tracker:
+  platform: aruba
+  host: YOUR_ACCESS_POINT_IP
+  username: YOUR_ADMIN_USERNAME
+  password: YOUR_ADMIN_PASSWORD
+
+Variables:
+
+host
+*Required
+The IP address of your router, e.g. 192.168.1.1.
+
+username
+*Required
+The username of an user with administrative privileges, usually 'admin'.
+
+password
+*Required
+The password for your given admin account.
+"""
+import logging
+from datetime import timedelta
+import re
+import threading
+import telnetlib
+
+from homeassistant.const import CONF_HOST, CONF_USERNAME, CONF_PASSWORD
+from homeassistant.helpers import validate_config
+from homeassistant.util import Throttle
+from homeassistant.components.device_tracker import DOMAIN
+
+# Return cached results if last scan was less then this time ago
+MIN_TIME_BETWEEN_SCANS = timedelta(seconds=10)
+
+_LOGGER = logging.getLogger(__name__)
+
+_DEVICES_REGEX = re.compile(
+    r'(?P<name>([^\s]+))\s+' +
+    r'(?P<ip>([0-9]{1,3}[\.]){3}[0-9]{1,3})\s+' +
+    r'(?P<mac>(([0-9a-f]{2}[:-]){5}([0-9a-f]{2})))\s+' +
+    r'(?P<os>([^\s]+))\s+' +
+    r'(?P<network>([^\s]+))\s+' +
+    r'(?P<ap>([^\s]+))\s+' +
+    r'(?P<channel>([^\s]+))\s+' +
+    r'(?P<type>([^\s]+))\s+' +
+    r'(?P<role>([^\s]+))\s+' +
+    r'(?P<signal>([^\s]+))\s+' +
+    r'(?P<speed>([^\s]+))')
+
+
+# pylint: disable=unused-argument
+def get_scanner(hass, config):
+    """ Validates config and returns a Aruba scanner. """
+    if not validate_config(config,
+                           {DOMAIN: [CONF_HOST, CONF_USERNAME, CONF_PASSWORD]},
+                           _LOGGER):
+        return None
+
+    scanner = ArubaDeviceScanner(config[DOMAIN])
+
+    return scanner if scanner.success_init else None
+
+
+class ArubaDeviceScanner(object):
+    """ This class queries a Aruba Acces Point for connected devices. """
+    def __init__(self, config):
+        self.host = config[CONF_HOST]
+        self.username = config[CONF_USERNAME]
+        self.password = config[CONF_PASSWORD]
+
+        self.lock = threading.Lock()
+
+        self.last_results = {}
+
+        # Test the router is accessible
+        data = self.get_aruba_data()
+        self.success_init = data is not None
+
+    def scan_devices(self):
+        """ Scans for new devices and return a list containing found device
+            ids. """
+
+        self._update_info()
+        return [client['mac'] for client in self.last_results]
+
+    def get_device_name(self, device):
+        """ Returns the name of the given device or None if we don't know. """
+        if not self.last_results:
+            return None
+        for client in self.last_results:
+            if client['mac'] == device:
+                return client['name']
+        return None
+
+    @Throttle(MIN_TIME_BETWEEN_SCANS)
+    def _update_info(self):
+        """ Ensures the information from the Aruba Access Point is up to date.
+            Returns boolean if scanning successful. """
+        if not self.success_init:
+            return False
+
+        with self.lock:
+            data = self.get_aruba_data()
+            if not data:
+                return False
+
+            self.last_results = data.values()
+            return True
+
+    def get_aruba_data(self):
+        """ Retrieve data from Aruba Access Point and return parsed
+            result.  """
+        try:
+            telnet = telnetlib.Telnet(self.host)
+            telnet.read_until(b'User: ')
+            telnet.write((self.username + '\r\n').encode('ascii'))
+            telnet.read_until(b'Password: ')
+            telnet.write((self.password + '\r\n').encode('ascii'))
+            telnet.read_until(b'#')
+            telnet.write(('show clients\r\n').encode('ascii'))
+            devices_result = telnet.read_until(b'#').split(b'\r\n')
+            telnet.write('exit\r\n'.encode('ascii'))
+        except EOFError:
+            _LOGGER.exception("Unexpected response from router")
+            return
+        except ConnectionRefusedError:
+            _LOGGER.exception("Connection refused by router," +
+                              " is telnet enabled?")
+            return
+
+        devices = {}
+        for device in devices_result:
+            match = _DEVICES_REGEX.search(device.decode('utf-8'))
+            if match:
+                devices[match.group('ip')] = {
+                    'ip': match.group('ip'),
+                    'mac': match.group('mac').upper(),
+                    'name': match.group('name')
+                    }
+        return devices