9e92d60427
Signed-off-by: IWASE Yusuke <iwase.yusuke0@gmail.com> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
121 lines
3.4 KiB
Python
121 lines
3.4 KiB
Python
# Copyright (C) 2015 Nippon Telegraph and Telephone Corporation.
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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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import numbers
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import struct
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from ryu.lib import addrconv
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from ryu.lib import type_desc
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def ipv4_to_bin(ip):
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"""
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Converts human readable IPv4 string to binary representation.
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:param str ip: IPv4 address string
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:return: binary representation of IPv4 address
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"""
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return addrconv.ipv4.text_to_bin(ip)
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def ipv4_to_int(ip):
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"""
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Converts human readable IPv4 string to int type representation.
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:param str ip: IPv4 address string w.x.y.z
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:returns: unsigned int of form w << 24 | x << 16 | y << 8 | z
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"""
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return struct.unpack("!I", addrconv.ipv4.text_to_bin(ip))[0]
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def ipv4_to_str(ip):
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"""
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Converts binary or int type representation to human readable IPv4 string.
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:param ip: binary or int type representation of IPv4 address
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:return: IPv4 address string
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"""
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if isinstance(ip, int):
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return addrconv.ipv4.bin_to_text(struct.pack("!I", ip))
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else:
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return addrconv.ipv4.bin_to_text(ip)
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def ipv6_to_bin(ip):
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"""
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Converts human readable IPv6 string to binary representation.
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:param str ip: IPv6 address string
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:return: binary representation of IPv6 address
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"""
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return addrconv.ipv6.text_to_bin(ip)
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def ipv6_to_int(ip):
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"""
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Converts human readable IPv6 string to int type representation.
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:param str ip: IPv6 address string
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:returns: int type representation of IPv6 address
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"""
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return type_desc.Int16.to_user(addrconv.ipv6.text_to_bin(ip))
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def ipv6_to_str(ip):
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"""
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Converts binary or int type representation to human readable IPv6 string.
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:param ip: binary or int type representation of IPv6 address
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:return: IPv6 address string
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"""
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if isinstance(ip, numbers.Integral):
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return addrconv.ipv6.bin_to_text(type_desc.Int16.from_user(ip))
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else:
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return addrconv.ipv6.bin_to_text(ip)
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def text_to_bin(ip):
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"""
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Converts human readable IPv4 or IPv6 string to binary representation.
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:param str ip: IPv4 or IPv6 address string
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:return: binary representation of IPv4 or IPv6 address
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"""
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if ':' not in ip:
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return ipv4_to_bin(ip)
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else:
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return ipv6_to_bin(ip)
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def text_to_int(ip):
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"""
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Converts human readable IPv4 or IPv6 string to int type representation.
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:param str ip: IPv4 or IPv6 address string
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:return: int type representation of IPv4 or IPv6 address
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"""
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if ':' not in ip:
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return ipv4_to_int(ip)
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else:
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return ipv6_to_int(ip)
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def bin_to_text(ip):
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"""
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Converts binary representation to human readable IPv4 or IPv6 string.
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:param ip: binary representation of IPv4 or IPv6 address
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:return: IPv4 or IPv6 address string
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"""
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if len(ip) == 4:
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return ipv4_to_str(ip)
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elif len(ip) == 16:
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return ipv6_to_str(ip)
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else:
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raise struct.error('Invalid ip address length: %s' % len(ip))
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