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-rw-r--r--src/ovs/ofctl.py24
1 files changed, 24 insertions, 0 deletions
diff --git a/src/ovs/ofctl.py b/src/ovs/ofctl.py
index 43151d3a..93894889 100644
--- a/src/ovs/ofctl.py
+++ b/src/ovs/ofctl.py
@@ -23,6 +23,7 @@ https://github.com/openstack/neutron/blob/6eac1dc99124ca024d6a69b3abfa3bc69c7356
import os
import logging
import string
+import re
from tools import tasks
from conf import settings
@@ -389,3 +390,26 @@ def flow_key(flow):
flow_str = _flow_del_key.substitute(_flow_key_param)
return flow_str
+
+def flow_match(flow_dump, flow_src):
+ """ Compares two flows
+
+ :param flow_dump: string - a string with flow obtained by ovs-ofctl dump-flows
+ :param flow_src: string - a string with flow obtained by call of flow_key()
+
+ :return: boolean
+ """
+ # perform unifications on both source and destination flows
+ flow_dump = flow_dump.replace('actions=', 'action=')
+ flow_src = flow_src.replace('actions=', 'action=')
+
+ # split flow strings into lists of comparable elements
+ flow_dump_list = re.findall(r"[\w.:=()]+", flow_dump)
+ flow_src_list = re.findall(r"[\w.:=()]+", flow_src)
+
+ # check if all items from source flow are present in dump flow
+ flow_src_ctrl = list(flow_src_list)
+ for rule in flow_src_list:
+ if rule in flow_dump_list:
+ flow_src_ctrl.remove(rule)
+ return True if not len(flow_src_ctrl) else False