[sensor.dnsip] New Sensor: DNS IP (#6214)

* Added DNS IP sensor

* Removed unused import

* Added coverage

* fixed flake

* Applied suggested changes

* Removed debug code

* Switched to aiodns

* Raised scan interval

* Updating state with entity creation

* Lint

* Updated requirements_all

.coveragerc

@@ -312,6 +312,7 @@ omit =
     homeassistant/components/sensor/darksky.py
     homeassistant/components/sensor/deutsche_bahn.py
     homeassistant/components/sensor/dht.py
+    homeassistant/components/sensor/dnsip.py
     homeassistant/components/sensor/dovado.py
     homeassistant/components/sensor/dte_energy_bridge.py
     homeassistant/components/sensor/ebox.py

homeassistant/components/sensor/dnsip.py

@@ -0,0 +1,86 @@
+"""
+Get your own public IP address or that of any host.
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/sensor.dnsip/
+"""
+import asyncio
+import logging
+from datetime import timedelta
+
+import voluptuous as vol
+
+from homeassistant.const import STATE_UNKNOWN
+from homeassistant.components.sensor import PLATFORM_SCHEMA
+import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity import Entity
+
+REQUIREMENTS = ['aiodns==1.1.1']
+
+_LOGGER = logging.getLogger(__name__)
+
+CONF_HOSTNAME = 'hostname'
+CONF_RESOLVER = 'resolver'
+CONF_RESOLVER_IPV6 = 'resolver_ipv6'
+CONF_IPV6 = 'ipv6'
+
+DEFAULT_HOSTNAME = 'myip.opendns.com'
+DEFAULT_RESOLVER = '208.67.222.222'
+DEFAULT_RESOLVER_IPV6 = '2620:0:ccc::2'
+DEFAULT_IPV6 = False
+
+SCAN_INTERVAL = timedelta(seconds=120)
+
+PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
+    vol.Optional(CONF_HOSTNAME, default=DEFAULT_HOSTNAME): cv.string,
+    vol.Optional(CONF_RESOLVER, default=DEFAULT_RESOLVER): cv.string,
+    vol.Optional(CONF_RESOLVER_IPV6, default=DEFAULT_RESOLVER_IPV6): cv.string,
+    vol.Optional(CONF_IPV6, default=DEFAULT_IPV6): cv.boolean,
+})
+
+
+@asyncio.coroutine
+def async_setup_platform(hass, config, async_add_devices, discovery_info=None):
+    """Setup the DNS IP sensor."""
+    hostname = config.get(CONF_HOSTNAME)
+    ipv6 = config.get(CONF_IPV6)
+    if ipv6:
+        resolver = config.get(CONF_RESOLVER_IPV6)
+    else:
+        resolver = config.get(CONF_RESOLVER)
+
+    yield from async_add_devices([WanIpSensor(
+        hass, hostname, resolver, ipv6)], True)
+
+
+class WanIpSensor(Entity):
+    """Implementation of a DNS IP sensor."""
+
+    def __init__(self, hass, hostname, resolver, ipv6):
+        """Initialize the sensor."""
+        import aiodns
+        self.hass = hass
+        self._name = hostname
+        self.resolver = aiodns.DNSResolver(loop=self.hass.loop)
+        self.resolver.nameservers = [resolver]
+        self.querytype = 'AAAA' if ipv6 else 'A'
+        self._state = STATE_UNKNOWN
+
+    @property
+    def name(self):
+        """Return the name of the sensor."""
+        return self._name
+
+    @property
+    def state(self):
+        """Return the current DNS IP address for hostname."""
+        return self._state
+
+    @asyncio.coroutine
+    def async_update(self):
+        """Get the current DNS IP address for hostname."""
+        response = yield from self.resolver.query(self._name, self.querytype)
+        if response:
+            self._state = response[0].host
+        else:
+            self._state = STATE_UNKNOWN

requirements_all.txt

@@ -33,6 +33,9 @@ SoCo==0.12
 # homeassistant.components.notify.twitter
 TwitterAPI==2.4.4
 
+# homeassistant.components.sensor.dnsip
+aiodns==1.1.1
+
 # homeassistant.components.emulated_hue
 # homeassistant.components.http
 aiohttp_cors==0.5.0