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IPy - class and tools for handling of IPv4 and IPv6 addresses and networks.
Presentation of the API
=======================
The IP class allows a comfortable parsing and handling for most
notations in use for IPv4 and IPv6 addresses and networks. It was
greatly inspired by RIPE's Perl module NET::IP's interface but
doesn't share the implementation. It doesn't share non-CIDR netmasks,
so funky stuff like a netmask of 0xffffff0f can't be done here.
>>> from IPy import IP
>>> ip = IP('127.0.0.0/30')
>>> for x in ip:
... print x
...
127.0.0.0
127.0.0.1
127.0.0.2
127.0.0.3
>>> ip2 = IP('0x7f000000/30')
>>> ip == ip2
1
>>> ip.reverseNames()
['0.0.0.127.in-addr.arpa.', '1.0.0.127.in-addr.arpa.', '2.0.0.127.in-addr.arpa.', '3.0.0.127.in-addr.arpa.']
>>> ip.reverseName()
'0-3.0.0.127.in-addr.arpa.'
>>> ip.iptype()
'PRIVATE'
Supports most IP address formats
================================
It can detect about a dozen different ways of expressing IP addresses
and networks, parse them and distinguish between IPv4 and IPv6 addresses:
>>> IP('10.0.0.0/8').version()
4
>>> IP('::1').version()
6
IPv4 addresses
--------------
>>> print IP(0x7f000001)
127.0.0.1
>>> print IP('0x7f000001')
127.0.0.1
>>> print IP('127.0.0.1')
127.0.0.1
>>> print IP('10')
10.0.0.0
IPv6 addresses
--------------
>>> print IP('1080:0:0:0:8:800:200C:417A')
1080::8:800:200c:417a
>>> print IP('1080::8:800:200C:417A')
1080::8:800:200c:417a
>>> print IP('::1')
::1
>>> print IP('::13.1.68.3')
::d01:4403
Network mask and prefixes
-------------------------
>>> print IP('127.0.0.0/8')
127.0.0.0/8
>>> print IP('127.0.0.0/255.0.0.0')
127.0.0.0/8
>>> print IP('127.0.0.0-127.255.255.255')
127.0.0.0/8
Derive network address
===========================
IPy can transform an IP address into a network address by applying the given
netmask:
>>> print IP('127.0.0.1/255.0.0.0', make_net=True)
127.0.0.0/8
This can also be done for existing IP instances:
>>> print IP('127.0.0.1').make_net('255.0.0.0')
127.0.0.0/8
Convert address to string
=========================
Nearly all class methods which return a string have an optional
parameter 'wantprefixlen' which controls if the prefixlen or netmask
is printed. Per default the prefilen is always shown if the network
contains more than one address::
wantprefixlen == 0 / None don't return anything 1.2.3.0
wantprefixlen == 1 /prefix 1.2.3.0/24
wantprefixlen == 2 /netmask 1.2.3.0/255.255.255.0
wantprefixlen == 3 -lastip 1.2.3.0-1.2.3.255
You can also change the defaults on an per-object basis by fiddling with
the class members:
* NoPrefixForSingleIp
* WantPrefixLen
Examples of string conversions:
>>> IP('10.0.0.0/32').strNormal()
'10.0.0.0'
>>> IP('10.0.0.0/24').strNormal()
'10.0.0.0/24'
>>> IP('10.0.0.0/24').strNormal(0)
'10.0.0.0'
>>> IP('10.0.0.0/24').strNormal(1)
'10.0.0.0/24'
>>> IP('10.0.0.0/24').strNormal(2)
'10.0.0.0/255.255.255.0'
>>> IP('10.0.0.0/24').strNormal(3)
'10.0.0.0-10.0.0.255'
>>> ip = IP('10.0.0.0')
>>> print ip
10.0.0.0
>>> ip.NoPrefixForSingleIp = None
>>> print ip
10.0.0.0/32
>>> ip.WantPrefixLen = 3
>>> print ip
10.0.0.0-10.0.0.0
Compatibility and links
=======================
IPy 0.60 works on Python version 2.4 and 2.5.
This Python module is under BSD license: see COPYING file.
Further Information might be available at:
http://software.inl.fr/trac/trac.cgi/wiki/IPy
TODO
====
* better comparison (__cmp__ and friends)
* tests for __cmp__
* always write hex values lowercase
* interpret 2001:1234:5678:1234/64 as 2001:1234:5678:1234::/64
* move size in bits into class variables to get rid of
some "if self._ipversion ..."
* support for base85 encoding
* support for output of IPv6 encoded IPv4 Addresses
* update address type tables
* first-last notation should be allowed for IPv6
* add IPv6 docstring examples
* check better for negative parameters
* add addition / aggregation
* move reverse name stuff out of the classes and refactor it
* support for aggregation of more than two nets at once
* support for aggregation with "holes"
* support for finding common prefix
* '>>' and '<<' for prefix manipulation
* add our own exceptions instead ValueError all the time
* rename checkPrefix to checkPrefixOk
* add more documentation and doctests
* refactor
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