Remove external macaddress package dependency

netbox/dcim/fields.py

@@ -0,0 +1,43 @@
+from netaddr import EUI, mac_unix_expanded
+
+from django.core.exceptions import ValidationError
+from django.db import models
+
+from .formfields import MACAddressFormField
+
+class mac_unix_expanded_uppercase(mac_unix_expanded):
+    word_fmt = '%.2X'
+
+
+class MACAddressField(models.Field):
+    description = "PostgreSQL MAC Address field"
+
+    def python_type(self):
+        return EUI
+
+    def from_db_value(self, value, expression, connection, context):
+        return self.to_python(value)
+
+    def to_python(self, value):
+        if not value:
+            return value
+        try:
+            return EUI(value, dialect=mac_unix_expanded_uppercase)
+        except ValueError as e:
+            raise ValidationError(e)
+
+    def db_type(self, connection):
+        return 'macaddr'
+
+    def get_prep_value(self, value):
+        if not value:
+            return None
+        return str(self.to_python(value))
+
+    def form_class(self):
+        return MACAddressFormField
+
+    def formfield(self, **kwargs):
+        defaults = {'form_class': self.form_class()}
+        defaults.update(kwargs)
+        return super(MACAddressField, self).formfield(**defaults)