add hikvision (#243)

Author: fbradyirl

netdisco/discoverables/hikvision.py

@@ -0,0 +1,13 @@
+"""Discover Hikvision cameras."""
+from . import MDNSDiscoverable
+
+
+class Discoverable(MDNSDiscoverable):
+    """Add support for discovering Hikvision cameras."""
+
+    def __init__(self, nd):
+        """Initialize Hikvision camera discovery."""
+        super(Discoverable, self).__init__(nd, '_http._tcp.local.')
+
+    def get_entries(self):
+        return self.find_by_device_name('HIKVISION')