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# Copyright (C) 2011 Nippon Telegraph and Telephone Corporation.
# Copyright (C) 2011 Isaku Yamahata <yamahata 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.
from os_ken.lib import addrconv
import struct
# string representation
HADDR_PATTERN = r'([0-9a-f]{2}:){5}[0-9a-f]{2}'
DONTCARE = b'\x00' * 6
BROADCAST = b'\xff' * 6
DONTCARE_STR = '00:00:00:00:00:00'
BROADCAST_STR = 'ff:ff:ff:ff:ff:ff'
MULTICAST = 'fe:ff:ff:ff:ff:ff'
UNICAST = '01:00:00:00:00:00'
def is_multicast(addr):
return bool(int(addr[0]) & 0x01)
def haddr_to_str(addr):
"""Format mac address in internal representation into human readable
form"""
if addr is None:
return 'None'
try:
return addrconv.mac.bin_to_text(addr)
except:
raise AssertionError
def haddr_to_int(addr):
"""Convert mac address string in human readable format into
integer value"""
try:
return int(addr.replace(':', ''), 16)
except:
raise ValueError
def haddr_to_bin(string):
"""Parse mac address string in human readable format into
internal representation"""
try:
return addrconv.mac.text_to_bin(string)
except:
raise ValueError
def haddr_bitand(addr, mask):
return b''.join(struct.Struct(">B").pack(int(a) & int(m)) for (a, m)
in zip(addr, mask))
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