bvm-radius: actually add cuirecv policy file

ops/nixos/bvm-radius/raddb/policy.d/cuirecv

@@ -0,0 +1,46 @@
+#
+#  The following policies are for the Chargeable-User-Identity
+#  (CUI) configuration.
+#
+#  The policies below can be called as just 'cui' (not
+#  cui.authorize etc..)  from the various config sections.
+#
+
+## This is a limited configuration for Visited-only sites.
+
+#
+#  The client indicates it can do CUI by sending a CUI attribute
+#  containing one zero byte.
+#  A non-empty value in Operator-Name can be an additional requirement.
+#  Normally CUI support is turned on only for such requests.
+#  CUI support can be used for local clients which do not
+#  supports CUI themselves, the server can simulate a CUI request
+#  adding the missing NUL CUI value and the Operator-Name attribute.
+#  Clients which are supposed to get this treatment should
+#  be marked by add_cui flag in clients.conf
+#  We assume that local clients are marked in the client.conf with
+#  add_cui flag, e.g.
+#  client xxxx {
+#    ...
+#    add_cui = yes
+#  }
+#
+cui.authorize {
+	if ("%{client:add_cui}" == 'yes') {
+		update request {
+			&Chargeable-User-Identity := 0x00
+		}
+	}
+}
+
+#
+#  Before proxing an Access-Request to a remote server, a NUL CUI
+#  attribute should be added, unless it is already present in the request.
+#
+cui.pre-proxy {
+	if (("%{request:Packet-Type}" == 'Access-Request') && ("%{client:add_cui}" == 'yes')) {
+		update proxy-request {
+			&Chargeable-User-Identity = 0x00
+		}
+	}
+}