mirrors/ryu
1
0
Fork 0
mirror of https://github.com/faucetsdn/ryu.git synced 2026-05-08 13:56:09 +02:00
Code Issues Projects Releases Wiki Activity

addrconv: binary <-> text conversion of mac/ipv4/ipv6 addresses

Browse Source 
implemented as a simple wrapper of netaddr.

background:
    the goal is to use the consistent representations of addresses
    throughout the tree, instead of the current ad-hoc representations
    like a list of int16 for ipv6 address.

    - netaddr style text (eg. '10.0.0.1', 'ff02::1') for ryu-app level api.
    - on-wire binary for internal use.

    this is the first step to the direction.  ie. have a single
    implementation of address representation conversion.

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
This commit is contained in:
YAMAMOTO Takashi 2013-07-23 12:54:07 +09:00 committed by FUJITA Tomonori
parent a1b6d39f9d
commit 80d4202c91
1 changed files with 69 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

69
ryu/lib/addrconv.py Normal file
View File

@ -0,0 +1,69 @@
#!/usr/bin/env python
#
# Copyright (C) 2013 Nippon Telegraph and Telephone Corporation.
# Copyright (C) 2013 YAMAMOTO Takashi <yamamoto at valinux co jp>
#
# 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 netaddr
class AddressConverter(object):
def __init__(self, addr, strat, **kwargs):
self._addr = addr
self._strat = strat
self._addr_kwargs = kwargs
def text_to_bin(self, text):
return self._addr(text, **self._addr_kwargs).packed
def bin_to_text(self, bin):
return str(self._addr(self._strat.packed_to_int(bin),
**self._addr_kwargs))
ipv4 = AddressConverter(netaddr.IPAddress, netaddr.strategy.ipv4, version=4)
ipv6 = AddressConverter(netaddr.IPAddress, netaddr.strategy.ipv6, version=6)
class mac_mydialect(netaddr.mac_unix):
word_fmt = '%.2x'
mac = AddressConverter(netaddr.EUI, netaddr.strategy.eui48, version=48,
dialect=mac_mydialect)
if __name__ == '__main__':
def eq_(a, b):
if a != b:
print a
print b
l = ['127.0.0.1', '255.255.0.0']
conv = ipv4
b2t = conv.bin_to_text
t2b = conv.text_to_bin
for a in l:
eq_(b2t(t2b(a)), a)
l = ['ff02::1', 'fe80::f00b:a4ff:fe7d:f8ea', '::']
conv = ipv6
b2t = conv.bin_to_text
t2b = conv.text_to_bin
for a in l:
eq_(b2t(t2b(a)), a)
l = ['f2:0b:a4:01:0a:23']
conv = mac
b2t = conv.bin_to_text
t2b = conv.text_to_bin
for a in l:
eq_(b2t(t2b(a)), a)