X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Flibraries%2Fpython%2Ftopology.py;h=338ccb6b575d1b3b014ab9755befce1598866701;hp=b2d106d3ed2c050ea79ff15f52fedf16c504dfb3;hb=a318ebefc569c5c1b1527c5de6dd3e3ac2f9c163;hpb=20083f2e3d4fcd603ecba522e08e445b932cca5f

diff --git a/resources/libraries/python/topology.py b/resources/libraries/python/topology.py
index b2d106d3ed..338ccb6b57 100644
--- a/resources/libraries/python/topology.py
+++ b/resources/libraries/python/topology.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2019 Cisco and/or its affiliates.
+# Copyright (c) 2020 Cisco and/or its affiliates.
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at:
@@ -22,6 +22,8 @@ from yaml import safe_load
 from robot.api import logger
 from robot.libraries.BuiltIn import BuiltIn, RobotNotRunningError
 
+from resources.libraries.python.Constants import Constants
+
 __all__ = [
     u"DICT__nodes", u"Topology", u"NodeType", u"SocketType", u"NodeSubTypeTG"
 ]
@@ -704,6 +706,22 @@ class Topology:
         except KeyError:
             return None
 
+    @staticmethod
+    def get_interface_ip4_prefix_length(node, iface_key):
+        """Get IP4 address prefix length for the interface.
+
+        :param node: Node to get prefix length on.
+        :param iface_key: Interface key from topology file.
+        :type node: dict
+        :type iface_key: str
+        :returns: Prefix length from topology file or the default
+            IP4 prefix length if not found.
+        :rtype: int
+        :raises: KeyError if iface_key is not found.
+        """
+        return node[u"interfaces"][iface_key].get(u"ip4_prefix_length", \
+            Constants.DEFAULT_IP4_PREFIX_LENGTH)
+
     @staticmethod
     def get_adjacent_node_and_interface(nodes_info, node, iface_key):
         """Get node and interface adjacent to specified interface
@@ -861,8 +879,6 @@ class Topology:
         :rtype: list
         """
 
-        logger.trace(f"node1: {str(node1)}")
-        logger.trace(f"node2: {str(node2)}")
         node1_links = self._get_node_active_link_names(
             node1, filter_list=filter_list_node1
         )
@@ -876,7 +892,10 @@ class Topology:
         elif node2_links is None:
             logger.error(u"Unable to find active links for node2")
         else:
-            connecting_links = list(set(node1_links).intersection(node2_links))
+            # Not using set operations, as we need deterministic order.
+            connecting_links = [
+                link for link in node1_links if link in node2_links
+            ]
 
         return connecting_links