=IP version 4 Strategy Module=

Copyright (c) 2008-2010, David P. D. Moss. All rights reserved.

Uses TEST-NET references throughout, as described in RFC 3330.

{{{

>>> from netaddr.strategy.ipv4 import *

}}}

==Basic Smoke Tests==

{{{

>>> b = '11000000.00000000.00000010.00000001'
>>> i = 3221225985
>>> t = (192, 0, 2, 1)
>>> s = '192.0.2.1'
>>> p = b'\xc0\x00\x02\x01'
>>> bin_val = '0b11000000000000000000001000000001'

>>> bits_to_int(b) == 3221225985
True

>>> int_to_bits(i)
'11000000.00000000.00000010.00000001'

>>> int_to_str(i)
'192.0.2.1'

>>> int_to_words(i) == (192, 0, 2, 1)
True

>>> int_to_packed(i)
b'\xc0\x00\x02\x01'

>>> int_to_bin(i)
'0b11000000000000000000001000000001'

>>> int_to_bin(i)
'0b11000000000000000000001000000001'

>>> bin_to_int(bin_val) == 3221225985
True

>>> words_to_int(t) == 3221225985
True

>>> words_to_int(list(t)) == 3221225985
True

>>> packed_to_int(p) == 3221225985
True

>>> valid_bin(bin_val)
True

}}}

== inet_aton() Behavioural Tests ==

inet_aton() is a very old system call and is very permissive with regard to what is assume is a valid IPv4 address. Unfortunately, it is also the most widely used by system software used in software today, so netaddr supports this behaviour by default.

{{{

>>> str_to_int('127') == 127
True

>>> str_to_int('0x7f') == 127
True

>>> str_to_int('0177') == 127
True

>>> str_to_int('127.1') == 2130706433
True

>>> str_to_int('0x7f.1') == 2130706433
True

>>> str_to_int('0177.1') == 2130706433
True

>>> str_to_int('127.0.0.1') == 2130706433
True

}}}

== inet_pton() Behavioural Tests ==

inet_pton() is a newer system call that supports both IPv4 and IPv6. It is a lot more strict about what it deems to be a valid IPv4 address and doesn't support many of the features found in inet_aton() such as support for non- decimal octets, partial numbers of octets, etc.

{{{

>>> str_to_int('127', flags=INET_PTON)
Traceback (most recent call last):
...
netaddr.core.AddrFormatError: '127' is not a valid IPv4 address string!

>>> str_to_int('0x7f', flags=INET_PTON)
Traceback (most recent call last):
...
netaddr.core.AddrFormatError: '0x7f' is not a valid IPv4 address string!

>>> str_to_int('0177', flags=INET_PTON)
Traceback (most recent call last):
...
netaddr.core.AddrFormatError: '0177' is not a valid IPv4 address string!

>>> str_to_int('127.1', flags=INET_PTON)
Traceback (most recent call last):
...
netaddr.core.AddrFormatError: '127.1' is not a valid IPv4 address string!

>>> str_to_int('0x7f.1', flags=INET_PTON)
Traceback (most recent call last):
...
netaddr.core.AddrFormatError: '0x7f.1' is not a valid IPv4 address string!

>>> str_to_int('0177.1', flags=INET_PTON)
Traceback (most recent call last):
...
netaddr.core.AddrFormatError: '0177.1' is not a valid IPv4 address string!

>>> str_to_int('127.0.0.1', flags=INET_PTON) == 2130706433
True

}}}
