1 files changed, 15 insertions, 0 deletions
diff --git a/rpkid/rpki/resource_set.py b/rpkid/rpki/resource_set.py
index 08a577c9..611f1f44 100644
--- a/rpkid/rpki/resource_set.py
+++ b/rpkid/rpki/resource_set.py
@@ -703,6 +703,21 @@ class resource_bag(object):
            not other.v6.issubset(self.v6)
 
   @classmethod
+  def from_inheritance(cls):
+    """
+    Build a resource bag that just inherits everything from its
+    parent.
+    """
+    self = cls()
+    self.asn = resource_set_as()
+    self.v4 = resource_set_ipv4()
+    self.v6 = resource_set_ipv6()
+    self.asn.inherit = True
+    self.v4.inherit = True
+    self.v6.inherit = True
+    return self
+
+  @classmethod
   def from_rfc3779_tuples(cls, exts):
     """
     Build a resource_bag from intermediate form generated by RFC 3779