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
161
162
163
164
165
166
167
168
169
170
|
# coding: utf-8
from __future__ import unicode_literals, division, absolute_import, print_function
import socket
import struct
from ._errors import unwrap
from ._types import byte_cls, bytes_to_list, str_cls, type_name
def inet_ntop(address_family, packed_ip):
"""
Windows compatibility shim for socket.inet_ntop().
:param address_family:
socket.AF_INET for IPv4 or socket.AF_INET6 for IPv6
:param packed_ip:
A byte string of the network form of an IP address
:return:
A unicode string of the IP address
"""
if address_family not in set([socket.AF_INET, socket.AF_INET6]):
raise ValueError(unwrap(
'''
address_family must be socket.AF_INET (%s) or socket.AF_INET6 (%s),
not %s
''',
repr(socket.AF_INET),
repr(socket.AF_INET6),
repr(address_family)
))
if not isinstance(packed_ip, byte_cls):
raise TypeError(unwrap(
'''
packed_ip must be a byte string, not %s
''',
type_name(packed_ip)
))
required_len = 4 if address_family == socket.AF_INET else 16
if len(packed_ip) != required_len:
raise ValueError(unwrap(
'''
packed_ip must be %d bytes long - is %d
''',
required_len,
len(packed_ip)
))
if address_family == socket.AF_INET:
return '%d.%d.%d.%d' % tuple(bytes_to_list(packed_ip))
octets = struct.unpack(b'!HHHHHHHH', packed_ip)
runs_of_zero = {}
longest_run = 0
zero_index = None
for i, octet in enumerate(octets + (-1,)):
if octet != 0:
if zero_index is not None:
length = i - zero_index
if length not in runs_of_zero:
runs_of_zero[length] = zero_index
longest_run = max(longest_run, length)
zero_index = None
elif zero_index is None:
zero_index = i
hexed = [hex(o)[2:] for o in octets]
if longest_run < 2:
return ':'.join(hexed)
zero_start = runs_of_zero[longest_run]
zero_end = zero_start + longest_run
return ':'.join(hexed[:zero_start]) + '::' + ':'.join(hexed[zero_end:])
def inet_pton(address_family, ip_string):
"""
Windows compatibility shim for socket.inet_ntop().
:param address_family:
socket.AF_INET for IPv4 or socket.AF_INET6 for IPv6
:param ip_string:
A unicode string of an IP address
:return:
A byte string of the network form of the IP address
"""
if address_family not in set([socket.AF_INET, socket.AF_INET6]):
raise ValueError(unwrap(
'''
address_family must be socket.AF_INET (%s) or socket.AF_INET6 (%s),
not %s
''',
repr(socket.AF_INET),
repr(socket.AF_INET6),
repr(address_family)
))
if not isinstance(ip_string, str_cls):
raise TypeError(unwrap(
'''
ip_string must be a unicode string, not %s
''',
type_name(ip_string)
))
if address_family == socket.AF_INET:
octets = ip_string.split('.')
error = len(octets) != 4
if not error:
ints = []
for o in octets:
o = int(o)
if o > 255 or o < 0:
error = True
break
ints.append(o)
if error:
raise ValueError(unwrap(
'''
ip_string must be a dotted string with four integers in the
range of 0 to 255, got %s
''',
repr(ip_string)
))
return struct.pack(b'!BBBB', *ints)
error = False
omitted = ip_string.count('::')
if omitted > 1:
error = True
elif omitted == 0:
octets = ip_string.split(':')
error = len(octets) != 8
else:
begin, end = ip_string.split('::')
begin_octets = begin.split(':')
end_octets = end.split(':')
missing = 8 - len(begin_octets) - len(end_octets)
octets = begin_octets + (['0'] * missing) + end_octets
if not error:
ints = []
for o in octets:
o = int(o, 16)
if o > 65535 or o < 0:
error = True
break
ints.append(o)
return struct.pack(b'!HHHHHHHH', *ints)
raise ValueError(unwrap(
'''
ip_string must be a valid ipv6 string, got %s
''',
repr(ip_string)
))
|