os-ken/ryu/lib/port_no.py
YAMADA Hideki 4590e0d20e lib/port_no: handling port_no as string
Signed-off-by: YAMADA Hideki <yamada.hideki@po.ntts.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
2013-03-31 18:11:00 +09:00

32 lines
1.0 KiB
Python

# Copyright (C) 2013 Nippon Telegraph and Telephone Corporation.
#
# 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.
# Internal representation of port_no id is int(32bit)
# string representation is in hex without '0x'
_PORT_NO_LEN = 8
_PORT_NO_LEN_STR = str(_PORT_NO_LEN)
_PORT_NO_FMT = '%0' + _PORT_NO_LEN_STR + 'x'
PORT_NO_PATTERN = r'[0-9a-f]{%d}' % _PORT_NO_LEN
def port_no_to_str(port_no):
return _PORT_NO_FMT % port_no
def str_to_port_no(port_no_str):
assert len(port_no_str) == _PORT_NO_LEN
return int(port_no_str, 16)