57 lines
1.6 KiB
Python
57 lines
1.6 KiB
Python
# Copyright (C) 2011 Nippon Telegraph and Telephone Corporation.
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# Copyright (C) 2011 Isaku Yamahata <yamahata at valinux co jp>
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from ryu.lib import addrconv
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# string representation
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HADDR_PATTERN = r'([0-9a-f]{2}:){5}[0-9a-f]{2}'
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DONTCARE = '\x00' * 6
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BROADCAST = '\xff' * 6
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DONTCARE_STR = '00:00:00:00:00:00'
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BROADCAST_STR = 'ff:ff:ff:ff:ff:ff'
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MULTICAST = 'fe:ff:ff:ff:ff:ff'
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UNICAST = '01:00:00:00:00:00'
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def is_multicast(addr):
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return bool(ord(addr[0]) & 0x01)
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def haddr_to_str(addr):
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"""Format mac address in internal representation into human readable
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form"""
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if addr is None:
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return 'None'
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try:
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return addrconv.mac.bin_to_text(addr)
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except:
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raise AssertionError
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def haddr_to_bin(string):
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"""Parse mac address string in human readable format into
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internal representation"""
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try:
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return addrconv.mac.text_to_bin(string)
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except:
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raise ValueError
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def haddr_bitand(addr, mask):
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return ''.join(chr(ord(a) & ord(m)) for (a, m)
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in zip(addr, mask))
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