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IPy.py
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"""
IPy - class and tools for handling of IPv4 and IPv6 addresses and networks.
See README file for learn how to use IPy.
Further Information might be available at:
https://github.com/haypo/python-ipy
"""
__version__ = '0.76'
import sys
import types
# Definition of the Ranges for IPv4 IPs
# this should include www.iana.org/assignments/ipv4-address-space
# and www.iana.org/assignments/multicast-addresses
IPv4ranges = {
'0': 'PUBLIC', # fall back
'00000000': 'PRIVATE', # 0/8
'00001010': 'PRIVATE', # 10/8
'01111111': 'PRIVATE', # 127.0/8
'1': 'PUBLIC', # fall back
'1010100111111110': 'PRIVATE', # 169.254/16
'101011000001': 'PRIVATE', # 172.16/12
'1100000010101000': 'PRIVATE', # 192.168/16
'111': 'RESERVED' # 224/3
}
# Definition of the Ranges for IPv6 IPs
# http://www.iana.org/assignments/ipv6-address-space/
# http://www.iana.org/assignments/ipv6-unicast-address-assignments/
# http://www.iana.org/assignments/ipv6-multicast-addresses/
IPv6ranges = {
'00000000' : 'RESERVED', # ::/8
'0' * 96 : 'RESERVED', # ::/96 Formerly IPV4COMP [RFC4291]
'0' * 128 : 'UNSPECIFIED', # ::/128
'0' * 127 + '1' : 'LOOPBACK', # ::1/128
'0' * 80 + '1' * 16 : 'IPV4MAP', # ::ffff:0:0/96
'00000000011001001111111110011011' + '0' * 64 : 'WKP46TRANS', # 0064:ff9b::/96 Well-Known-Prefix [RFC6052]
'00000001' : 'UNASSIGNED', # 0100::/8
'0000001' : 'RESERVED', # 0200::/7 Formerly NSAP [RFC4048]
'0000010' : 'RESERVED', # 0400::/7 Formerly IPX [RFC3513]
'0000011' : 'RESERVED', # 0600::/7
'00001' : 'RESERVED', # 0800::/5
'0001' : 'RESERVED', # 1000::/4
'001' : 'GLOBAL-UNICAST', # 2000::/3 [RFC4291]
'00100000000000010000000' : 'SPECIALPURPOSE', # 2001::/23 [RFC4773]
'00100000000000010000000000000000' : 'TEREDO', # 2001::/32 [RFC4380]
'00100000000000010000000000000010' + '0' * 16 : 'BMWG', # 2001:0002::/48 Benchmarking [RFC5180]
'0010000000000001000000000001' : 'ORCHID', # 2001:0010::/28 (Temp until 2014-03-21) [RFC4843]
'00100000000000010000001' : 'ALLOCATED APNIC', # 2001:0200::/23
'00100000000000010000010' : 'ALLOCATED ARIN', # 2001:0400::/23
'00100000000000010000011' : 'ALLOCATED RIPE NCC', # 2001:0600::/23
'00100000000000010000100' : 'ALLOCATED RIPE NCC', # 2001:0800::/23
'00100000000000010000101' : 'ALLOCATED RIPE NCC', # 2001:0a00::/23
'00100000000000010000110' : 'ALLOCATED APNIC', # 2001:0c00::/23
'00100000000000010000110110111000' : 'DOCUMENTATION', # 2001:0db8::/32 [RFC3849]
'00100000000000010000111' : 'ALLOCATED APNIC', # 2001:0e00::/23
'00100000000000010001001' : 'ALLOCATED LACNIC', # 2001:1200::/23
'00100000000000010001010' : 'ALLOCATED RIPE NCC', # 2001:1400::/23
'00100000000000010001011' : 'ALLOCATED RIPE NCC', # 2001:1600::/23
'00100000000000010001100' : 'ALLOCATED ARIN', # 2001:1800::/23
'00100000000000010001101' : 'ALLOCATED RIPE NCC', # 2001:1a00::/23
'0010000000000001000111' : 'ALLOCATED RIPE NCC', # 2001:1c00::/22
'00100000000000010010' : 'ALLOCATED RIPE NCC', # 2001:2000::/20
'001000000000000100110' : 'ALLOCATED RIPE NCC', # 2001:3000::/21
'0010000000000001001110' : 'ALLOCATED RIPE NCC', # 2001:3800::/22
'0010000000000001001111' : 'RESERVED', # 2001:3c00::/22 Possible future allocation to RIPE NCC
'00100000000000010100000' : 'ALLOCATED RIPE NCC', # 2001:4000::/23
'00100000000000010100001' : 'ALLOCATED AFRINIC', # 2001:4200::/23
'00100000000000010100010' : 'ALLOCATED APNIC', # 2001:4400::/23
'00100000000000010100011' : 'ALLOCATED RIPE NCC', # 2001:4600::/23
'00100000000000010100100' : 'ALLOCATED ARIN', # 2001:4800::/23
'00100000000000010100101' : 'ALLOCATED RIPE NCC', # 2001:4a00::/23
'00100000000000010100110' : 'ALLOCATED RIPE NCC', # 2001:4c00::/23
'00100000000000010101' : 'ALLOCATED RIPE NCC', # 2001:5000::/20
'0010000000000001100' : 'ALLOCATED APNIC', # 2001:8000::/19
'00100000000000011010' : 'ALLOCATED APNIC', # 2001:a000::/20
'00100000000000011011' : 'ALLOCATED APNIC', # 2001:b000::/20
'0010000000000010' : '6TO4', # 2002::/16 "6to4" [RFC3056]
'001000000000001100' : 'ALLOCATED RIPE NCC', # 2003::/18
'001001000000' : 'ALLOCATED APNIC', # 2400::/12
'001001100000' : 'ALLOCATED ARIN', # 2600::/12
'00100110000100000000000' : 'ALLOCATED ARIN', # 2610::/23
'00100110001000000000000' : 'ALLOCATED ARIN', # 2620::/23
'001010000000' : 'ALLOCATED LACNIC', # 2800::/12
'001010100000' : 'ALLOCATED RIPE NCC', # 2a00::/12
'001011000000' : 'ALLOCATED AFRINIC', # 2c00::/12
'00101101' : 'RESERVED', # 2d00::/8
'0010111' : 'RESERVED', # 2e00::/7
'0011' : 'RESERVED', # 3000::/4
'010' : 'RESERVED', # 4000::/3
'011' : 'RESERVED', # 6000::/3
'100' : 'RESERVED', # 8000::/3
'101' : 'RESERVED', # a000::/3
'110' : 'RESERVED', # c000::/3
'1110' : 'RESERVED', # e000::/4
'11110' : 'RESERVED', # f000::/5
'111110' : 'RESERVED', # f800::/6
'1111110' : 'ULA', # fc00::/7 [RFC4193]
'111111100' : 'RESERVED', # fe00::/9
'1111111010' : 'LINKLOCAL', # fe80::/10
'1111111011' : 'RESERVED', # fec0::/10 Formerly SITELOCAL [RFC4291]
'11111111' : 'MULTICAST', # ff00::/8
'1111111100000001' : 'NODE-LOCAL MULTICAST', # ff01::/16
'1111111100000010' : 'LINK-LOCAL MULTICAST', # ff02::/16
'1111111100000100' : 'ADMIN-LOCAL MULTICAST', # ff04::/16
'1111111100000101' : 'SITE-LOCAL MULTICAST', # ff05::/16
'1111111100001000' : 'ORG-LOCAL MULTICAST', # ff08::/16
'1111111100001110' : 'GLOBAL MULTICAST', # ff0e::/16
'1111111100001111' : 'RESERVED MULTICAST', # ff0f::/16
'111111110011' : 'PREFIX-BASED MULTICAST', # ff30::/12 [RFC3306]
'111111110111' : 'RP-EMBEDDED MULTICAST', # ff70::/12 [RFC3956]
}
class IPint:
"""Handling of IP addresses returning integers.
Use class IP instead because some features are not implemented for
IPint."""
def __init__(self, data, ipversion=0, make_net=0):
"""Create an instance of an IP object.
Data can be a network specification or a single IP. IP
addresses can be specified in all forms understood by
parseAddress(). The size of a network can be specified as
/prefixlen a.b.c.0/24 2001:658:22a:cafe::/64
-lastIP a.b.c.0-a.b.c.255 2001:658:22a:cafe::-2001:658:22a:cafe:ffff:ffff:ffff:ffff
/decimal netmask a.b.c.d/255.255.255.0 not supported for IPv6
If no size specification is given a size of 1 address (/32 for
IPv4 and /128 for IPv6) is assumed.
If make_net is True, an IP address will be transformed into the network
address by applying the specified netmask.
>>> 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
>>> print(IP('127.0.0.1/255.0.0.0', make_net=True))
127.0.0.0/8
See module documentation for more examples.
"""
# Print no Prefixlen for /32 and /128
self.NoPrefixForSingleIp = 1
# Do we want prefix printed by default? see _printPrefix()
self.WantPrefixLen = None
netbits = 0
prefixlen = -1
# handling of non string values in constructor
if isinstance(data, (int, long)):
self.ip = long(data)
if ipversion == 0:
if self.ip < 0x100000000:
ipversion = 4
else:
ipversion = 6
if ipversion == 4:
if self.ip > 0xffffffff:
raise ValueError("IPv4 Addresses can't be larger than 0xffffffffffffffffffffffffffffffff: %x" % self.ip)
prefixlen = 32
elif ipversion == 6:
if self.ip > 0xffffffffffffffffffffffffffffffff:
raise ValueError("IPv6 Addresses can't be larger than 0xffffffffffffffffffffffffffffffff: %x" % self.ip)
prefixlen = 128
else:
raise ValueError("only IPv4 and IPv6 supported")
self._ipversion = ipversion
self._prefixlen = prefixlen
# handle IP instance as an parameter
elif isinstance(data, IPint):
self._ipversion = data._ipversion
self._prefixlen = data._prefixlen
self.ip = data.ip
elif isinstance(data, (str, unicode)):
# TODO: refactor me!
# splitting of a string into IP and prefixlen et. al.
x = data.split('-')
if len(x) == 2:
# a.b.c.0-a.b.c.255 specification ?
(ip, last) = x
(self.ip, parsedVersion) = parseAddress(ip)
if parsedVersion != 4:
raise ValueError("first-last notation only allowed for IPv4")
(last, lastversion) = parseAddress(last)
if lastversion != 4:
raise ValueError("last address should be IPv4, too")
if last < self.ip:
raise ValueError("last address should be larger than first")
size = last - self.ip
netbits = _count1Bits(size)
# make sure the broadcast is the same as the last ip
# otherwise it will return /16 for something like:
# 192.168.0.0-192.168.191.255
if IP('%s/%s' % (ip, 32-netbits)).broadcast().int() != last:
raise ValueError("the range %s is not on a network boundary." % data)
elif len(x) == 1:
x = data.split('/')
# if no prefix is given use defaults
if len(x) == 1:
ip = x[0]
prefixlen = -1
elif len(x) > 2:
raise ValueError("only one '/' allowed in IP Address")
else:
(ip, prefixlen) = x
if prefixlen.find('.') != -1:
# check if the user might have used a netmask like
# a.b.c.d/255.255.255.0
(netmask, vers) = parseAddress(prefixlen)
if vers != 4:
raise ValueError("netmask must be IPv4")
prefixlen = _netmaskToPrefixlen(netmask)
elif len(x) > 2:
raise ValueError("only one '-' allowed in IP Address")
else:
raise ValueError("can't parse")
(self.ip, parsedVersion) = parseAddress(ip)
if ipversion == 0:
ipversion = parsedVersion
if prefixlen == -1:
if ipversion == 4:
prefixlen = 32 - netbits
elif ipversion == 6:
prefixlen = 128 - netbits
else:
raise ValueError("only IPv4 and IPv6 supported")
self._ipversion = ipversion
self._prefixlen = int(prefixlen)
if make_net:
self.ip = self.ip & _prefixlenToNetmask(self._prefixlen, self._ipversion)
if not _checkNetaddrWorksWithPrefixlen(self.ip,
self._prefixlen, self._ipversion):
raise ValueError("%s has invalid prefix length (%s)" % (repr(self), self._prefixlen))
else:
raise TypeError("Unsupported data type: %s" % type(data))
def int(self):
"""Return the first / base / network addess as an (long) integer.
The same as IP[0].
>>> "%X" % IP('10.0.0.0/8').int()
'A000000'
"""
return self.ip
def version(self):
"""Return the IP version of this Object.
>>> IP('10.0.0.0/8').version()
4
>>> IP('::1').version()
6
"""
return self._ipversion
def prefixlen(self):
"""Returns Network Prefixlen.
>>> IP('10.0.0.0/8').prefixlen()
8
"""
return self._prefixlen
def net(self):
"""
Return the base (first) address of a network as an (long) integer.
"""
return self.int()
def broadcast(self):
"""
Return the broadcast (last) address of a network as an (long) integer.
The same as IP[-1]."""
return self.int() + self.len() - 1
def _printPrefix(self, want):
"""Prints Prefixlen/Netmask.
Not really. In fact it is our universal Netmask/Prefixlen printer.
This is considered an internal function.
want == 0 / None don't return anything 1.2.3.0
want == 1 /prefix 1.2.3.0/24
want == 2 /netmask 1.2.3.0/255.255.255.0
want == 3 -lastip 1.2.3.0-1.2.3.255
"""
if (self._ipversion == 4 and self._prefixlen == 32) or \
(self._ipversion == 6 and self._prefixlen == 128):
if self.NoPrefixForSingleIp:
want = 0
if want == None:
want = self.WantPrefixLen
if want == None:
want = 1
if want:
if want == 2:
# this should work with IP and IPint
netmask = self.netmask()
if not isinstance(netmask, (int, long)):
netmask = netmask.int()
return "/%s" % (intToIp(netmask, self._ipversion))
elif want == 3:
return "-%s" % (intToIp(self.ip + self.len() - 1, self._ipversion))
else:
# default
return "/%d" % (self._prefixlen)
else:
return ''
# We have different flavours to convert to:
# strFullsize 127.0.0.1 2001:0658:022a:cafe:0200:c0ff:fe8d:08fa
# strNormal 127.0.0.1 2001:658:22a:cafe:200:c0ff:fe8d:08fa
# strCompressed 127.0.0.1 2001:658:22a:cafe::1
# strHex 0x7F000001 0x20010658022ACAFE0200C0FFFE8D08FA
# strDec 2130706433 42540616829182469433547974687817795834
def strBin(self, wantprefixlen = None):
"""Return a string representation as a binary value.
>>> print(IP('127.0.0.1').strBin())
01111111000000000000000000000001
"""
if self._ipversion == 4:
bits = 32
elif self._ipversion == 6:
bits = 128
else:
raise ValueError("only IPv4 and IPv6 supported")
if self.WantPrefixLen == None and wantprefixlen == None:
wantprefixlen = 0
ret = _intToBin(self.ip)
return '0' * (bits - len(ret)) + ret + self._printPrefix(wantprefixlen)
def strCompressed(self, wantprefixlen = None):
"""Return a string representation in compressed format using '::' Notation.
>>> IP('127.0.0.1').strCompressed()
'127.0.0.1'
>>> IP('2001:0658:022a:cafe:0200::1').strCompressed()
'2001:658:22a:cafe:200::1'
>>> IP('ffff:ffff:ffff:ffff:ffff:f:f:fffc/127').strCompressed()
'ffff:ffff:ffff:ffff:ffff:f:f:fffc/127'
"""
if self.WantPrefixLen == None and wantprefixlen == None:
wantprefixlen = 1
if self._ipversion == 4:
return self.strFullsize(wantprefixlen)
else:
if self.ip >> 32 == 0xffff:
ipv4 = intToIp(self.ip & 0xffffffff, 4)
text = "::ffff:" + ipv4 + self._printPrefix(wantprefixlen)
return text
# find the longest sequence of '0'
hextets = [int(x, 16) for x in self.strFullsize(0).split(':')]
# every element of followingzeros will contain the number of zeros
# following the corresponding element of hextets
followingzeros = [0] * 8
for i in xrange(len(hextets)):
followingzeros[i] = _countFollowingZeros(hextets[i:])
# compressionpos is the position where we can start removing zeros
compressionpos = followingzeros.index(max(followingzeros))
if max(followingzeros) > 1:
# genererate string with the longest number of zeros cut out
# now we need hextets as strings
hextets = [x for x in self.strNormal(0).split(':')]
while compressionpos < len(hextets) and hextets[compressionpos] == '0':
del(hextets[compressionpos])
hextets.insert(compressionpos, '')
if compressionpos + 1 >= len(hextets):
hextets.append('')
if compressionpos == 0:
hextets = [''] + hextets
return ':'.join(hextets) + self._printPrefix(wantprefixlen)
else:
return self.strNormal(0) + self._printPrefix(wantprefixlen)
def strNormal(self, wantprefixlen = None):
"""Return a string representation in the usual format.
>>> print(IP('127.0.0.1').strNormal())
127.0.0.1
>>> print(IP('2001:0658:022a:cafe:0200::1').strNormal())
2001:658:22a:cafe:200:0:0:1
"""
if self.WantPrefixLen == None and wantprefixlen == None:
wantprefixlen = 1
if self._ipversion == 4:
ret = self.strFullsize(0)
elif self._ipversion == 6:
ret = ':'.join([hex(x)[2:] for x in [int(x, 16) for x in self.strFullsize(0).split(':')]])
else:
raise ValueError("only IPv4 and IPv6 supported")
return ret + self._printPrefix(wantprefixlen)
def strFullsize(self, wantprefixlen = None):
"""Return a string representation in the non-mangled format.
>>> print(IP('127.0.0.1').strFullsize())
127.0.0.1
>>> print(IP('2001:0658:022a:cafe:0200::1').strFullsize())
2001:0658:022a:cafe:0200:0000:0000:0001
"""
if self.WantPrefixLen == None and wantprefixlen == None:
wantprefixlen = 1
return intToIp(self.ip, self._ipversion).lower() + self._printPrefix(wantprefixlen)
def strHex(self, wantprefixlen = None):
"""Return a string representation in hex format in lower case.
>>> IP('127.0.0.1').strHex()
'0x7f000001'
>>> IP('2001:0658:022a:cafe:0200::1').strHex()
'0x20010658022acafe0200000000000001'
"""
if self.WantPrefixLen == None and wantprefixlen == None:
wantprefixlen = 0
x = hex(self.ip)
if x[-1] == 'L':
x = x[:-1]
return x.lower() + self._printPrefix(wantprefixlen)
def strDec(self, wantprefixlen = None):
"""Return a string representation in decimal format.
>>> print(IP('127.0.0.1').strDec())
2130706433
>>> print(IP('2001:0658:022a:cafe:0200::1').strDec())
42540616829182469433547762482097946625
"""
if self.WantPrefixLen == None and wantprefixlen == None:
wantprefixlen = 0
x = str(self.ip)
if x[-1] == 'L':
x = x[:-1]
return x + self._printPrefix(wantprefixlen)
def iptype(self):
"""Return a description of the IP type ('PRIVATE', 'RESERVERD', etc).
>>> print(IP('127.0.0.1').iptype())
PRIVATE
>>> print(IP('192.168.1.1').iptype())
PRIVATE
>>> print(IP('195.185.1.2').iptype())
PUBLIC
>>> print(IP('::1').iptype())
LOOPBACK
>>> print(IP('2001:0658:022a:cafe:0200::1').iptype())
ALLOCATED RIPE NCC
The type information for IPv6 is out of sync with reality.
"""
# this could be greatly improved
if self._ipversion == 4:
iprange = IPv4ranges
elif self._ipversion == 6:
iprange = IPv6ranges
else:
raise ValueError("only IPv4 and IPv6 supported")
bits = self.strBin()
for i in xrange(len(bits), 0, -1):
if bits[:i] in iprange:
return iprange[bits[:i]]
return "unknown"
def netmask(self):
"""Return netmask as an integer.
>>> "%X" % IP('195.185.0.0/16').netmask().int()
'FFFF0000'
"""
# TODO: unify with prefixlenToNetmask?
if self._ipversion == 4:
locallen = 32 - self._prefixlen
elif self._ipversion == 6:
locallen = 128 - self._prefixlen
else:
raise ValueError("only IPv4 and IPv6 supported")
return ((2 ** self._prefixlen) - 1) << locallen
def strNetmask(self):
"""Return netmask as an string. Mostly useful for IPv6.
>>> print(IP('195.185.0.0/16').strNetmask())
255.255.0.0
>>> print(IP('2001:0658:022a:cafe::0/64').strNetmask())
/64
"""
# TODO: unify with prefixlenToNetmask?
if self._ipversion == 4:
locallen = 32 - self._prefixlen
return intToIp(((2 ** self._prefixlen) - 1) << locallen, 4)
elif self._ipversion == 6:
locallen = 128 - self._prefixlen
return "/%d" % self._prefixlen
else:
raise ValueError("only IPv4 and IPv6 supported")
def len(self):
"""Return the length of a subnet.
>>> print(IP('195.185.1.0/28').len())
16
>>> print(IP('195.185.1.0/24').len())
256
"""
if self._ipversion == 4:
locallen = 32 - self._prefixlen
elif self._ipversion == 6:
locallen = 128 - self._prefixlen
else:
raise ValueError("only IPv4 and IPv6 supported")
return 2 ** locallen
def __nonzero__(self):
"""All IPy objects should evaluate to true in boolean context.
Ordinarily they do, but if handling a default route expressed as
0.0.0.0/0, the __len__() of the object becomes 0, which is used
as the boolean value of the object.
"""
return True
def __len__(self):
"""Return the length of a subnet.
Called to implement the built-in function len().
It breaks with IPv6 Networks. Anybody knows how to fix this."""
# Python < 2.2 has this silly restriction which breaks IPv6
# how about Python >= 2.2 ... ouch - it persists!
return int(self.len())
def __getitem__(self, key):
"""Called to implement evaluation of self[key].
>>> ip=IP('127.0.0.0/30')
>>> for x in ip:
... print(repr(x))
...
IP('127.0.0.0')
IP('127.0.0.1')
IP('127.0.0.2')
IP('127.0.0.3')
>>> ip[2]
IP('127.0.0.2')
>>> ip[-1]
IP('127.0.0.3')
"""
if not isinstance(key, (int, long)):
raise TypeError
if key < 0:
if abs(key) <= self.len():
key = self.len() - abs(key)
else:
raise IndexError
else:
if key >= self.len():
raise IndexError
return self.ip + long(key)
def __contains__(self, item):
"""Called to implement membership test operators.
Should return true if item is in self, false otherwise. Item
can be other IP-objects, strings or ints.
>>> IP('195.185.1.1').strHex()
'0xc3b90101'
>>> 0xC3B90101 in IP('195.185.1.0/24')
True
>>> '127.0.0.1' in IP('127.0.0.0/24')
True
>>> IP('127.0.0.0/24') in IP('127.0.0.0/25')
False
"""
item = IP(item)
if item.ip >= self.ip and item.ip < self.ip + self.len() - item.len() + 1:
return True
else:
return False
def overlaps(self, item):
"""Check if two IP address ranges overlap.
Returns 0 if the two ranges don't overlap, 1 if the given
range overlaps at the end and -1 if it does at the beginning.
>>> IP('192.168.0.0/23').overlaps('192.168.1.0/24')
1
>>> IP('192.168.0.0/23').overlaps('192.168.1.255')
1
>>> IP('192.168.0.0/23').overlaps('192.168.2.0')
0
>>> IP('192.168.1.0/24').overlaps('192.168.0.0/23')
-1
"""
item = IP(item)
if item.ip >= self.ip and item.ip < self.ip + self.len():
return 1
elif self.ip >= item.ip and self.ip < item.ip + item.len():
return -1
else:
return 0
def __str__(self):
"""Dispatch to the prefered String Representation.
Used to implement str(IP)."""
return self.strCompressed()
def __repr__(self):
"""Print a representation of the Object.
Used to implement repr(IP). Returns a string which evaluates
to an identical Object (without the wantprefixlen stuff - see
module docstring.
>>> print(repr(IP('10.0.0.0/24')))
IP('10.0.0.0/24')
"""
return("IPint('%s')" % (self.strCompressed(1)))
def __cmp__(self, other):
"""Called by comparison operations.
Should return a negative integer if self < other, zero if self
== other, a positive integer if self > other.
Networks with different prefixlen are considered non-equal.
Networks with the same prefixlen and differing addresses are
considered non equal but are compared by their base address
integer value to aid sorting of IP objects.
The version of Objects is not put into consideration.
>>> IP('10.0.0.0/24') > IP('10.0.0.0')
1
>>> IP('10.0.0.0/24') < IP('10.0.0.0')
0
>>> IP('10.0.0.0/24') < IP('12.0.0.0/24')
1
>>> IP('10.0.0.0/24') > IP('12.0.0.0/24')
0
"""
# Im not really sure if this is "the right thing to do"
if self._prefixlen < other.prefixlen():
return (other.prefixlen() - self._prefixlen)
elif self._prefixlen > other.prefixlen():
# Fixed bySamuel Krempp <[email protected]>:
# The bug is quite obvious really (as 99% bugs are once
# spotted, isn't it ? ;-) Because of precedence of
# multiplication by -1 over the substraction, prefixlen
# differences were causing the __cmp__ function to always
# return positive numbers, thus the function was failing
# the basic assumptions for a __cmp__ function.
# Namely we could have (a > b AND b > a), when the
# prefixlen of a and b are different. (eg let
# a=IP("1.0.0.0/24"); b=IP("2.0.0.0/16");) thus, anything
# could happen when launching a sort algorithm..
# everything's in order with the trivial, attached patch.
return other.prefixlen() - self._prefixlen
else:
if self.ip < other.ip:
return -1
elif self.ip > other.ip:
return 1
elif self._ipversion != other._ipversion:
# IP('0.0.0.0'), IP('::/0')
if self._ipversion < other._ipversion:
return -1
elif self._ipversion > other._ipversion:
return 1
else:
return 0
else:
return 0
def __eq__(self, other):
if not isinstance(other, IPint):
return False
return self.__cmp__(other) == 0
def __ne__(self, other):
return not self.__eq__(other)
def __lt__(self, other):
return self.__cmp__(other) < 0
def __hash__(self):
"""Called for the key object for dictionary operations, and by
the built-in function hash(). Should return a 32-bit integer
usable as a hash value for dictionary operations. The only
required property is that objects which compare equal have the
same hash value
>>> IP('10.0.0.0/24').__hash__()
-167772185
"""
thehash = int(-1)
ip = self.ip
while ip > 0:
thehash = thehash ^ (ip & 0x7fffffff)
ip = ip >> 32
thehash = thehash ^ self._prefixlen
return int(thehash)
class IP(IPint):
"""Class for handling IP addresses and networks."""
def net(self):
"""Return the base (first) address of a network as an IP object.
The same as IP[0].
>>> IP('10.0.0.0/8').net()
IP('10.0.0.0')
"""
return IP(IPint.net(self), ipversion=self._ipversion)
def broadcast(self):
"""Return the broadcast (last) address of a network as an IP object.
The same as IP[-1].
>>> IP('10.0.0.0/8').broadcast()
IP('10.255.255.255')
"""
return IP(IPint.broadcast(self))
def netmask(self):
"""Return netmask as an IP object.
>>> IP('10.0.0.0/8').netmask()
IP('255.0.0.0')
"""
return IP(IPint.netmask(self), ipversion=self._ipversion)
def _getIPv4Map(self):
if self._ipversion != 6:
return None
if (self.ip >> 32) != 0xffff:
return None
ipv4 = self.ip & 0xffffffff
if self._prefixlen != 128:
ipv4 = '%s/%s' % (ipv4, 32-(128-self._prefixlen))
return IP(ipv4, ipversion=4)
def reverseNames(self):
"""Return a list with values forming the reverse lookup.
>>> IP('213.221.113.87/32').reverseNames()
['87.113.221.213.in-addr.arpa.']
>>> IP('213.221.112.224/30').reverseNames()
['224.112.221.213.in-addr.arpa.', '225.112.221.213.in-addr.arpa.', '226.112.221.213.in-addr.arpa.', '227.112.221.213.in-addr.arpa.']
>>> IP('127.0.0.0/24').reverseNames()
['0.0.127.in-addr.arpa.']
>>> IP('127.0.0.0/23').reverseNames()
['0.0.127.in-addr.arpa.', '1.0.127.in-addr.arpa.']
>>> IP('127.0.0.0/16').reverseNames()
['0.127.in-addr.arpa.']
>>> IP('127.0.0.0/15').reverseNames()
['0.127.in-addr.arpa.', '1.127.in-addr.arpa.']
>>> IP('128.0.0.0/8').reverseNames()
['128.in-addr.arpa.']
>>> IP('128.0.0.0/7').reverseNames()
['128.in-addr.arpa.', '129.in-addr.arpa.']
>>> IP('::1:2').reverseNames()
['2.0.0.0.1.ip6.arpa.']
"""
if self._ipversion == 4:
ret = []
# TODO: Refactor. Add support for IPint objects
if self.len() < 2**8:
for x in self:
ret.append(x.reverseName())
elif self.len() < 2**16:
for i in xrange(0, self.len(), 2**8):
ret.append(self[i].reverseName()[2:])
elif self.len() < 2**24:
for i in xrange(0, self.len(), 2**16):
ret.append(self[i].reverseName()[4:])
else:
for i in xrange(0, self.len(), 2**24):
ret.append(self[i].reverseName()[6:])
return ret
elif self._ipversion == 6:
ipv4 = self._getIPv4Map()
if ipv4 is not None:
return ipv4.reverseNames()
s = hex(self.ip)[2:].lower()
if s[-1] == 'l':
s = s[:-1]
if self._prefixlen % 4 != 0:
raise NotImplementedError("can't create IPv6 reverse names at sub nibble level")
s = list(s)
s.reverse()
s = '.'.join(s)
first_nibble_index = int(32 - (self._prefixlen // 4)) * 2
return ["%s.ip6.arpa." % s[first_nibble_index:]]
else:
raise ValueError("only IPv4 and IPv6 supported")
def reverseName(self):
"""Return the value for reverse lookup/PTR records as RFC 2317 look alike.
RFC 2317 is an ugly hack which only works for sub-/24 e.g. not
for /23. Do not use it. Better set up a zone for every
address. See reverseName for a way to achieve that.
>>> print(IP('195.185.1.1').reverseName())
1.1.185.195.in-addr.arpa.
>>> print(IP('195.185.1.0/28').reverseName())
0-15.1.185.195.in-addr.arpa.
>>> IP('::1:2').reverseName()
'2.0.0.0.1.ip6.arpa.'
"""
if self._ipversion == 4:
s = self.strFullsize(0)
s = s.split('.')
s.reverse()
first_byte_index = int(4 - (self._prefixlen // 8))
if self._prefixlen % 8 != 0:
nibblepart = "%s-%s" % (s[3-(self._prefixlen // 8)], intToIp(self.ip + self.len() - 1, 4).split('.')[-1])
if nibblepart[-1] == 'l':
nibblepart = nibblepart[:-1]
nibblepart += '.'
else:
nibblepart = ""
s = '.'.join(s[first_byte_index:])
return "%s%s.in-addr.arpa." % (nibblepart, s)
elif self._ipversion == 6:
ipv4 = self._getIPv4Map()
if ipv4 is not None:
return ipv4.reverseName()
s = hex(self.ip)[2:].lower()
if s[-1] == 'l':
s = s[:-1]
if self._prefixlen % 4 != 0:
nibblepart = "%s-%s" % (s[self._prefixlen:], hex(self.ip + self.len() - 1)[2:].lower())
if nibblepart[-1] == 'l':
nibblepart = nibblepart[:-1]
nibblepart += '.'
else:
nibblepart = ""
s = list(s)
s.reverse()
s = '.'.join(s)
first_nibble_index = int(32 - (self._prefixlen // 4)) * 2
return "%s%s.ip6.arpa." % (nibblepart, s[first_nibble_index:])
else:
raise ValueError("only IPv4 and IPv6 supported")
def make_net(self, netmask):
"""Transform a single IP address into a network specification by
applying the given netmask.
Returns a new IP instance.
>>> print(IP('127.0.0.1').make_net('255.0.0.0'))
127.0.0.0/8
"""
if '/' in str(netmask):
raise ValueError("invalid netmask (%s)" % netmask)
return IP('%s/%s' % (self, netmask), make_net=True)
def __getitem__(self, key):
"""Called to implement evaluation of self[key].
>>> ip=IP('127.0.0.0/30')
>>> for x in ip:
... print(str(x))
...
127.0.0.0
127.0.0.1
127.0.0.2
127.0.0.3
>>> print(str(ip[2]))
127.0.0.2
>>> print(str(ip[-1]))
127.0.0.3
"""
return IP(IPint.__getitem__(self, key))
def __repr__(self):
"""Print a representation of the Object.
>>> IP('10.0.0.0/8')
IP('10.0.0.0/8')
"""
return("IP('%s')" % (self.strCompressed(1)))
def __add__(self, other):
"""Emulate numeric objects through network aggregation"""
if self.prefixlen() != other.prefixlen():
raise ValueError("Only networks with the same prefixlen can be added.")
if self.prefixlen() < 1:
raise ValueError("Networks with a prefixlen longer than /1 can't be added.")
if self.version() != other.version():
raise ValueError("Only networks with the same IP version can be added.")
if self > other:
# fixed by Skinny Puppy <[email protected]>
return other.__add__(self)
else:
ret = IP(self.int())
ret._prefixlen = self.prefixlen() - 1
return ret
def get_mac(self):
"""
Get the 802.3 MAC address from IPv6 RFC 2464 address, in lower case.
Return None if the address is an IPv4 or not a IPv6 RFC 2464 address.
>>> IP('fe80::f66d:04ff:fe47:2fae').get_mac()
'f4:6d:04:47:2f:ae'
"""
if self._ipversion != 6:
return None
if (self.ip & 0x20000ffff000000) != 0x20000fffe000000:
return None
return '%02x:%02x:%02x:%02x:%02x:%02x' % (
(((self.ip >> 56) & 0xff) & 0xfd),
(self.ip >> 48) & 0xff,
(self.ip >> 40) & 0xff,
(self.ip >> 16) & 0xff,
(self.ip >> 8) & 0xff,
self.ip & 0xff,
)