32 lines
1.0 KiB
Python
32 lines
1.0 KiB
Python
# Copyright (C) 2012 Nippon Telegraph and Telephone Corporation.
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# Copyright (C) 2012 Isaku Yamahata <yamahata at private email ne 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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# Internal representation of datapath id is quad int
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# string representation is in hex without '0x'
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_DPID_LEN = 16
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_DPID_FMT = '%0{0}x'.format(_DPID_LEN)
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DPID_PATTERN = r'[0-9a-f]{%d}' % _DPID_LEN
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def dpid_to_str(dpid):
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return _DPID_FMT % dpid
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def str_to_dpid(dpid_str):
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assert len(dpid_str) == _DPID_LEN
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return int(dpid_str, 16)
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