flowspy: disable duplicates checking for new routes

To disable checking of duplicates during the creation of new rules, variable
ROUTES_DUPLICATES_CHECKING can be set to False.

flowspec/validators.py

@@ -196,6 +196,8 @@ def check_if_rule_exists(fields, queryset):
     :rtype: tuple(bool, str)
     """
 
+    if hasattr(settings, "ROUTES_DUPLICATES_CHECKING") and settings.ROUTES_DUPLICATES_CHECKING == False:
+        return (False, None)
     routes = queryset.filter(
         source=fields.get('source'),
         destination=ip_network(fields.get('destination')).compressed,

flowspy/settings.py.dist

@@ -470,6 +470,10 @@ SNMP_REMOVE_RULES_AFTER = 3600
 
 DISABLE_RULE_OVERLAP_CHECK = False
 
+# Perform checking for route duplicates (i.e., forbid creating multiple rules
+# with the same addresses). By default it is enabled (True).
+ROUTES_DUPLICATES_CHECKING = True
+
 ALLOW_DELETE_FULL_FOR_NONADMIN = False
 
 MAIL_NOTIFICATION_TO_ALL_MATCHING_PEERS = True