PAPI: Add MACAddress object wrapper for vl_api_mac_address_t

Change the definition of vl_api_mac_address_t to an aliased type.

Change-Id: I1434f316d0fad6a099592f39bceeb8faeaf1d134
Signed-off-by: Ole Troan <ot@cisco.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/src/vpp-api/python/vpp_papi/macaddress.py b/src/vpp-api/python/vpp_papi/macaddress.py
new file mode 100644
index 00000000000..a1003812003
--- /dev/null
+++ b/src/vpp-api/python/vpp_papi/macaddress.py
@@ -0,0 +1,54 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2016 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.
+#
+
+import binascii
+
+
+def mac_pton(s):
+    '''Convert MAC address as text to binary'''
+    return binascii.unhexlify(s.replace(':', ''))
+
+
+def mac_ntop(binary):
+    '''Convert MAC address as binary to text'''
+    x = b':'.join(binascii.hexlify(binary)[i:i + 2]
+                  for i in range(0, 12, 2))
+    return str(x.decode('ascii'))
+
+
+class MACAddress():
+    def __init__(self, mac):
+        '''MAC Address as a text-string (aa:bb:cc:dd:ee:ff) or 6 bytes'''
+        # Of course Python 2 doesn't distinguish str from bytes
+        if type(mac) is bytes and len(mac) == 6:
+            self.mac_binary = mac
+            self.mac_string = mac_ntop(mac)
+        else:
+            self.mac_binary = mac_pton(mac)
+            self.mac_string = mac
+
+    @property
+    def packed(self):
+        return self.mac_binary
+
+    def __len__(self):
+        return 6
+
+    def __str__(self):
+        return self.mac_string
+
+    def __repr__(self):
+        return '%s(%s)' % (self.__class__.__name__, self.mac_string)