Use separate module for ip address object

Reason: with upcomming vpp api changes the ip object will be used
in more csit python libraries, e.g. InterfaceUtil.py, so we need
to avoid circular import issue
(e.g. InterfaceUtil.pyu <-> IPUtil.py)

Change-Id: Ia658b187d4e326f58e33019dd54f8ac7b9137d78
Signed-off-by: Jan Gelety <jgelety@cisco.com>

1 files changed, 55 insertions, 0 deletions

diff --git a/resources/libraries/python/IPAddress.py b/resources/libraries/python/IPAddress.py
new file mode 100644
index 0000000000..b8a4d7443d
--- /dev/null
+++ b/resources/libraries/python/IPAddress.py
@@ -0,0 +1,55 @@
+# 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:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Common IP utilities library."""
+
+from enum import IntEnum
+
+
+class AddressFamily(IntEnum):
+    """IP address family."""
+    ADDRESS_IP4 = 0
+    ADDRESS_IP6 = 1
+
+
+class IPAddress:
+    """Common IP address utilities"""
+
+    @staticmethod
+    def union_addr(ip_addr):
+        """Creates union IP address.
+
+        :param ip_addr: IPv4 or IPv6 address.
+        :type ip_addr: IPv4Address or IPv6Address
+        :returns: Union IP address.
+        :rtype: dict
+        """
+        return dict(ip6=ip_addr.packed) if ip_addr.version == 6 \
+            else dict(ip4=ip_addr.packed)
+
+    @staticmethod
+    def create_ip_address_object(ip_addr):
+        """Create IP address object.
+
+        :param ip_addr: IPv4 or IPv6 address
+        :type ip_addr: IPv4Address or IPv6Address
+        :returns: IP address object.
+        :rtype: dict
+        """
+        return dict(
+            af=getattr(
+                AddressFamily, u"ADDRESS_IP6" if ip_addr.version == 6
+                else u"ADDRESS_IP4"
+            ).value,
+            un=IPAddress.union_addr(ip_addr)
+        )