1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
# Copyright (C) 2015 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.
import numbers
import struct
import netaddr
from ryu.lib import addrconv
from ryu.lib import type_desc
def _valid_ip(strategy, bits, addr, flags=0):
addr = addr.split('/')
if len(addr) == 1:
return strategy(addr[0], flags)
elif len(addr) == 2:
return strategy(addr[0], flags) and 0 <= int(addr[1]) <= bits
else:
return False
def valid_ipv4(addr, flags=0):
"""
Wrapper function of "netaddr.valid_ipv4()".
The function extends "netaddr.valid_ipv4()" to enable to validate
IPv4 network address in "xxx.xxx.xxx.xxx/xx" format.
:param addr: IP address to be validated.
:param flags: See the "netaddr.valid_ipv4()" docs for details.
:return: True is valid. False otherwise.
"""
return _valid_ip(netaddr.valid_ipv4, 32, addr, flags)
def valid_ipv6(addr, flags=0):
"""
Wrapper function of "netaddr.valid_ipv6()".
The function extends "netaddr.valid_ipv6()" to enable to validate
IPv4 network address in "xxxx:xxxx:xxxx::/xx" format.
:param addr: IP address to be validated.
:param flags: See the "netaddr.valid_ipv6()" docs for details.
:return: True is valid. False otherwise.
"""
return _valid_ip(netaddr.valid_ipv6, 128, addr, flags)
def ipv4_to_bin(ip):
"""
Converts human readable IPv4 string to binary representation.
:param str ip: IPv4 address string
:return: binary representation of IPv4 address
"""
return addrconv.ipv4.text_to_bin(ip)
def ipv4_to_int(ip):
"""
Converts human readable IPv4 string to int type representation.
:param str ip: IPv4 address string w.x.y.z
:returns: unsigned int of form w << 24 | x << 16 | y << 8 | z
"""
return struct.unpack("!I", addrconv.ipv4.text_to_bin(ip))[0]
def ipv4_to_str(ip):
"""
Converts binary or int type representation to human readable IPv4 string.
:param ip: binary or int type representation of IPv4 address
:return: IPv4 address string
"""
if isinstance(ip, numbers.Integral):
return addrconv.ipv4.bin_to_text(struct.pack("!I", ip))
else:
return addrconv.ipv4.bin_to_text(ip)
def ipv6_to_bin(ip):
"""
Converts human readable IPv6 string to binary representation.
:param str ip: IPv6 address string
:return: binary representation of IPv6 address
"""
return addrconv.ipv6.text_to_bin(ip)
def ipv6_to_int(ip):
"""
Converts human readable IPv6 string to int type representation.
:param str ip: IPv6 address string
:returns: int type representation of IPv6 address
"""
return type_desc.Int16.to_user(addrconv.ipv6.text_to_bin(ip))
def ipv6_to_str(ip):
"""
Converts binary or int type representation to human readable IPv6 string.
:param ip: binary or int type representation of IPv6 address
:return: IPv6 address string
"""
if isinstance(ip, numbers.Integral):
return addrconv.ipv6.bin_to_text(type_desc.Int16.from_user(ip))
else:
return addrconv.ipv6.bin_to_text(ip)
def text_to_bin(ip):
"""
Converts human readable IPv4 or IPv6 string to binary representation.
:param str ip: IPv4 or IPv6 address string
:return: binary representation of IPv4 or IPv6 address
"""
if ':' not in ip:
return ipv4_to_bin(ip)
else:
return ipv6_to_bin(ip)
def text_to_int(ip):
"""
Converts human readable IPv4 or IPv6 string to int type representation.
:param str ip: IPv4 or IPv6 address string
:return: int type representation of IPv4 or IPv6 address
"""
if ':' not in ip:
return ipv4_to_int(ip)
else:
return ipv6_to_int(ip)
def bin_to_text(ip):
"""
Converts binary representation to human readable IPv4 or IPv6 string.
:param ip: binary representation of IPv4 or IPv6 address
:return: IPv4 or IPv6 address string
"""
if len(ip) == 4:
return ipv4_to_str(ip)
elif len(ip) == 16:
return ipv6_to_str(ip)
else:
raise struct.error('Invalid ip address length: %s' % len(ip))
|
