Use function is_valid_mac from oslo.utils

Oslo.utils 3.17 provides same function, just use it.

Change-Id: I16e3775a239b017c3431c425d86085380e28da4c

ironic_inspector/plugins/standard.py

@@ -17,6 +17,7 @@ import sys
 
 import netaddr
 from oslo_config import cfg
+from oslo_utils import netutils
 from oslo_utils import units
 import six
 
@@ -177,7 +178,7 @@ class ValidateInterfacesHook(base.ProcessingHook):
                           name, data=data)
                 continue
 
-            if not utils.is_valid_mac(mac):
+            if not netutils.is_valid_mac(mac):
                 LOG.warning(_LW('MAC %(mac)s for interface %(name)s is '
                                 'not valid, skipping'),
                             {'mac': mac, 'name': name},

ironic_inspector/utils.py

@@ -13,7 +13,6 @@
 
 import datetime
 import logging as pylog
-import re
 
 import futurist
 from keystonemiddleware import auth_token
@@ -21,7 +20,6 @@ from oslo_config import cfg
 from oslo_log import log
 from oslo_middleware import cors as cors_middleware
 import pytz
-import six
 
 from ironic_inspector.common.i18n import _, _LE
 from ironic_inspector import conf  # noqa
@@ -189,13 +187,6 @@ def check_auth(request):
         raise Error(_('Access denied'), code=403)
 
 
-def is_valid_mac(address):
-    """Return whether given value is a valid MAC."""
-    m = "[0-9a-f]{2}(:[0-9a-f]{2}){5}$"
-    return (isinstance(address, six.string_types)
-            and re.match(m, address.lower()))
-
-
 def get_auth_strategy():
     if CONF.authenticate is not None:
         return 'keystone' if CONF.authenticate else 'noauth'