diff --git a/libs/ipaddress.py b/libs/ipaddress.py new file mode 100644 index 000000000..26d84ed76 --- /dev/null +++ b/libs/ipaddress.py @@ -0,0 +1,2231 @@ +# Python 2.7 port of Python 3.4's ipaddress module. + +# List of compatibility changes: + +# Python 3 uses only new-style classes. +# s/class \(\w\+\):/class \1(object):/ + +# Use iterator versions of map and range: +from itertools import imap as map +range = xrange + +# Except that xrange only supports machine integers, not longs, so... +def long_range(start, end): + while start < end: + yield start + start += 1 + +# This backport uses bytearray instead of bytes, as bytes is the same +# as str in Python 2.7. +bytes = bytearray + +# Python 2 does not support exception chaining. +# s/ from None$// + +# When checking for instances of int, also allow Python 2's long. +_builtin_isinstance = isinstance + +def isinstance(val, types): + if types is int: + types = (int, long) + elif type(types) is tuple and int in types: + types += (long,) + return _builtin_isinstance(val, types) + +# functools.lru_cache is Python 3.2+ only. +# /@functools.lru_cache()/d + +# int().to_bytes is Python 3.2+ only. +# s/\(\w+\)\.to_bytes(/_int_to_bytes(\1, / +def _int_to_bytes(self, length, byteorder, signed=False): + assert byteorder == 'big' and signed is False + if self < 0 or self >= 256**length: + raise OverflowError() + return bytearray(('%0*x' % (length * 2, self)).decode('hex')) + +# int.from_bytes is Python 3.2+ only. +# s/int\.from_bytes(/_int_from_bytes(/g +def _int_from_bytes(what, byteorder, signed=False): + assert byteorder == 'big' and signed is False + return int(str(bytearray(what)).encode('hex'), 16) + +# Python 2.6 has no int.bit_length() +if hasattr(int, 'bit_length'): + # Not `int.bit_length`, since it must also work for `long`. + _int_bit_length = lambda i: i.bit_length() +else: + _int_bit_length = lambda i: len(bin(abs(i))) - 2 + + + +# ---------------------------------------------------------------------------- + + +# Copyright 2007 Google Inc. +# Licensed to PSF under a Contributor Agreement. + +"""A fast, lightweight IPv4/IPv6 manipulation library in Python. + +This library is used to create/poke/manipulate IPv4 and IPv6 addresses +and networks. + +""" + +__version__ = '1.0' + + +import functools + +IPV4LENGTH = 32 +IPV6LENGTH = 128 + +class AddressValueError(ValueError): + """A Value Error related to the address.""" + + +class NetmaskValueError(ValueError): + """A Value Error related to the netmask.""" + + +def ip_address(address): + """Take an IP string/int and return an object of the correct type. + + Args: + address: A string or integer, the IP address. Either IPv4 or + IPv6 addresses may be supplied; integers less than 2**32 will + be considered to be IPv4 by default. + + Returns: + An IPv4Address or IPv6Address object. + + Raises: + ValueError: if the *address* passed isn't either a v4 or a v6 + address + + """ + try: + return IPv4Address(address) + except (AddressValueError, NetmaskValueError): + pass + + try: + return IPv6Address(address) + except (AddressValueError, NetmaskValueError): + pass + + raise ValueError('%r does not appear to be an IPv4 or IPv6 address' % + address) + + +def ip_network(address, strict=True): + """Take an IP string/int and return an object of the correct type. + + Args: + address: A string or integer, the IP network. Either IPv4 or + IPv6 networks may be supplied; integers less than 2**32 will + be considered to be IPv4 by default. + + Returns: + An IPv4Network or IPv6Network object. + + Raises: + ValueError: if the string passed isn't either a v4 or a v6 + address. Or if the network has host bits set. + + """ + try: + return IPv4Network(address, strict) + except (AddressValueError, NetmaskValueError): + pass + + try: + return IPv6Network(address, strict) + except (AddressValueError, NetmaskValueError): + pass + + raise ValueError('%r does not appear to be an IPv4 or IPv6 network' % + address) + + +def ip_interface(address): + """Take an IP string/int and return an object of the correct type. + + Args: + address: A string or integer, the IP address. Either IPv4 or + IPv6 addresses may be supplied; integers less than 2**32 will + be considered to be IPv4 by default. + + Returns: + An IPv4Interface or IPv6Interface object. + + Raises: + ValueError: if the string passed isn't either a v4 or a v6 + address. + + Notes: + The IPv?Interface classes describe an Address on a particular + Network, so they're basically a combination of both the Address + and Network classes. + + """ + try: + return IPv4Interface(address) + except (AddressValueError, NetmaskValueError): + pass + + try: + return IPv6Interface(address) + except (AddressValueError, NetmaskValueError): + pass + + raise ValueError('%r does not appear to be an IPv4 or IPv6 interface' % + address) + + +def v4_int_to_packed(address): + """Represent an address as 4 packed bytes in network (big-endian) order. + + Args: + address: An integer representation of an IPv4 IP address. + + Returns: + The integer address packed as 4 bytes in network (big-endian) order. + + Raises: + ValueError: If the integer is negative or too large to be an + IPv4 IP address. + + """ + try: + return _int_to_bytes(address, 4, 'big') + except: + raise ValueError("Address negative or too large for IPv4") + + +def v6_int_to_packed(address): + """Represent an address as 16 packed bytes in network (big-endian) order. + + Args: + address: An integer representation of an IPv6 IP address. + + Returns: + The integer address packed as 16 bytes in network (big-endian) order. + + """ + try: + return _int_to_bytes(address, 16, 'big') + except: + raise ValueError("Address negative or too large for IPv6") + + +def _split_optional_netmask(address): + """Helper to split the netmask and raise AddressValueError if needed""" + addr = str(address).split('/') + if len(addr) > 2: + raise AddressValueError("Only one '/' permitted in %r" % address) + return addr + + +def _find_address_range(addresses): + """Find a sequence of IPv#Address. + + Args: + addresses: a list of IPv#Address objects. + + Returns: + A tuple containing the first and last IP addresses in the sequence. + + """ + first = last = addresses[0] + for ip in addresses[1:]: + if ip._ip == last._ip + 1: + last = ip + else: + break + return (first, last) + + +def _count_righthand_zero_bits(number, bits): + """Count the number of zero bits on the right hand side. + + Args: + number: an integer. + bits: maximum number of bits to count. + + Returns: + The number of zero bits on the right hand side of the number. + + """ + if number == 0: + return bits + for i in range(bits): + if (number >> i) & 1: + return i + # All bits of interest were zero, even if there are more in the number + return bits + + +def summarize_address_range(first, last): + """Summarize a network range given the first and last IP addresses. + + Example: + >>> list(summarize_address_range(IPv4Address('192.0.2.0'), + ... IPv4Address('192.0.2.130'))) + ... #doctest: +NORMALIZE_WHITESPACE + [IPv4Network('192.0.2.0/25'), IPv4Network('192.0.2.128/31'), + IPv4Network('192.0.2.130/32')] + + Args: + first: the first IPv4Address or IPv6Address in the range. + last: the last IPv4Address or IPv6Address in the range. + + Returns: + An iterator of the summarized IPv(4|6) network objects. + + Raise: + TypeError: + If the first and last objects are not IP addresses. + If the first and last objects are not the same version. + ValueError: + If the last object is not greater than the first. + If the version of the first address is not 4 or 6. + + """ + if (not (isinstance(first, _BaseAddress) and + isinstance(last, _BaseAddress))): + raise TypeError('first and last must be IP addresses, not networks') + if first.version != last.version: + raise TypeError("%s and %s are not of the same version" % ( + first, last)) + if first > last: + raise ValueError('last IP address must be greater than first') + + if first.version == 4: + ip = IPv4Network + elif first.version == 6: + ip = IPv6Network + else: + raise ValueError('unknown IP version') + + ip_bits = first._max_prefixlen + first_int = first._ip + last_int = last._ip + while first_int <= last_int: + nbits = min(_count_righthand_zero_bits(first_int, ip_bits), + _int_bit_length(last_int - first_int + 1) - 1) + net = ip('%s/%d' % (first, ip_bits - nbits)) + yield net + first_int += 1 << nbits + if first_int - 1 == ip._ALL_ONES: + break + first = first.__class__(first_int) + + +def _collapse_addresses_recursive(addresses): + """Loops through the addresses, collapsing concurrent netblocks. + + Example: + + ip1 = IPv4Network('192.0.2.0/26') + ip2 = IPv4Network('192.0.2.64/26') + ip3 = IPv4Network('192.0.2.128/26') + ip4 = IPv4Network('192.0.2.192/26') + + _collapse_addresses_recursive([ip1, ip2, ip3, ip4]) -> + [IPv4Network('192.0.2.0/24')] + + This shouldn't be called directly; it is called via + collapse_addresses([]). + + Args: + addresses: A list of IPv4Network's or IPv6Network's + + Returns: + A list of IPv4Network's or IPv6Network's depending on what we were + passed. + + """ + while True: + last_addr = None + ret_array = [] + optimized = False + + for cur_addr in addresses: + if not ret_array: + last_addr = cur_addr + ret_array.append(cur_addr) + elif (cur_addr.network_address >= last_addr.network_address and + cur_addr.broadcast_address <= last_addr.broadcast_address): + optimized = True + elif cur_addr == list(last_addr.supernet().subnets())[1]: + ret_array[-1] = last_addr = last_addr.supernet() + optimized = True + else: + last_addr = cur_addr + ret_array.append(cur_addr) + + addresses = ret_array + if not optimized: + return addresses + + +def collapse_addresses(addresses): + """Collapse a list of IP objects. + + Example: + collapse_addresses([IPv4Network('192.0.2.0/25'), + IPv4Network('192.0.2.128/25')]) -> + [IPv4Network('192.0.2.0/24')] + + Args: + addresses: An iterator of IPv4Network or IPv6Network objects. + + Returns: + An iterator of the collapsed IPv(4|6)Network objects. + + Raises: + TypeError: If passed a list of mixed version objects. + + """ + i = 0 + addrs = [] + ips = [] + nets = [] + + # split IP addresses and networks + for ip in addresses: + if isinstance(ip, _BaseAddress): + if ips and ips[-1]._version != ip._version: + raise TypeError("%s and %s are not of the same version" % ( + ip, ips[-1])) + ips.append(ip) + elif ip._prefixlen == ip._max_prefixlen: + if ips and ips[-1]._version != ip._version: + raise TypeError("%s and %s are not of the same version" % ( + ip, ips[-1])) + try: + ips.append(ip.ip) + except AttributeError: + ips.append(ip.network_address) + else: + if nets and nets[-1]._version != ip._version: + raise TypeError("%s and %s are not of the same version" % ( + ip, nets[-1])) + nets.append(ip) + + # sort and dedup + ips = sorted(set(ips)) + nets = sorted(set(nets)) + + while i < len(ips): + (first, last) = _find_address_range(ips[i:]) + i = ips.index(last) + 1 + addrs.extend(summarize_address_range(first, last)) + + return iter(_collapse_addresses_recursive(sorted( + addrs + nets, key=_BaseNetwork._get_networks_key))) + + +def get_mixed_type_key(obj): + """Return a key suitable for sorting between networks and addresses. + + Address and Network objects are not sortable by default; they're + fundamentally different so the expression + + IPv4Address('192.0.2.0') <= IPv4Network('192.0.2.0/24') + + doesn't make any sense. There are some times however, where you may wish + to have ipaddress sort these for you anyway. If you need to do this, you + can use this function as the key= argument to sorted(). + + Args: + obj: either a Network or Address object. + Returns: + appropriate key. + + """ + if isinstance(obj, _BaseNetwork): + return obj._get_networks_key() + elif isinstance(obj, _BaseAddress): + return obj._get_address_key() + return NotImplemented + + +class _TotalOrderingMixin(object): + # Helper that derives the other comparison operations from + # __lt__ and __eq__ + # We avoid functools.total_ordering because it doesn't handle + # NotImplemented correctly yet (http://bugs.python.org/issue10042) + def __eq__(self, other): + raise NotImplementedError + def __ne__(self, other): + equal = self.__eq__(other) + if equal is NotImplemented: + return NotImplemented + return not equal + def __lt__(self, other): + raise NotImplementedError + def __le__(self, other): + less = self.__lt__(other) + if less is NotImplemented or not less: + return self.__eq__(other) + return less + def __gt__(self, other): + less = self.__lt__(other) + if less is NotImplemented: + return NotImplemented + equal = self.__eq__(other) + if equal is NotImplemented: + return NotImplemented + return not (less or equal) + def __ge__(self, other): + less = self.__lt__(other) + if less is NotImplemented: + return NotImplemented + return not less + +class _IPAddressBase(_TotalOrderingMixin): + + """The mother class.""" + + @property + def exploded(self): + """Return the longhand version of the IP address as a string.""" + return self._explode_shorthand_ip_string() + + @property + def compressed(self): + """Return the shorthand version of the IP address as a string.""" + return str(self) + + @property + def version(self): + msg = '%200s has no version specified' % (type(self),) + raise NotImplementedError(msg) + + def _check_int_address(self, address): + if address < 0: + msg = "%d (< 0) is not permitted as an IPv%d address" + raise AddressValueError(msg % (address, self._version)) + if address > self._ALL_ONES: + msg = "%d (>= 2**%d) is not permitted as an IPv%d address" + raise AddressValueError(msg % (address, self._max_prefixlen, + self._version)) + + def _check_packed_address(self, address, expected_len): + address_len = len(address) + if address_len != expected_len: + msg = "%r (len %d != %d) is not permitted as an IPv%d address" + raise AddressValueError(msg % (address, address_len, + expected_len, self._version)) + + def _ip_int_from_prefix(self, prefixlen): + """Turn the prefix length into a bitwise netmask + + Args: + prefixlen: An integer, the prefix length. + + Returns: + An integer. + + """ + return self._ALL_ONES ^ (self._ALL_ONES >> prefixlen) + + def _prefix_from_ip_int(self, ip_int): + """Return prefix length from the bitwise netmask. + + Args: + ip_int: An integer, the netmask in axpanded bitwise format + + Returns: + An integer, the prefix length. + + Raises: + ValueError: If the input intermingles zeroes & ones + """ + trailing_zeroes = _count_righthand_zero_bits(ip_int, + self._max_prefixlen) + prefixlen = self._max_prefixlen - trailing_zeroes + leading_ones = ip_int >> trailing_zeroes + all_ones = (1 << prefixlen) - 1 + if leading_ones != all_ones: + byteslen = self._max_prefixlen // 8 + details = _int_to_bytes(ip_int, byteslen, 'big') + msg = 'Netmask pattern %r mixes zeroes & ones' + raise ValueError(msg % details) + return prefixlen + + def _report_invalid_netmask(self, netmask_str): + msg = '%r is not a valid netmask' % netmask_str + raise NetmaskValueError(msg) + + def _prefix_from_prefix_string(self, prefixlen_str): + """Return prefix length from a numeric string + + Args: + prefixlen_str: The string to be converted + + Returns: + An integer, the prefix length. + + Raises: + NetmaskValueError: If the input is not a valid netmask + """ + # int allows a leading +/- as well as surrounding whitespace, + # so we ensure that isn't the case + if not _BaseV4._DECIMAL_DIGITS.issuperset(prefixlen_str): + self._report_invalid_netmask(prefixlen_str) + try: + prefixlen = int(prefixlen_str) + except ValueError: + self._report_invalid_netmask(prefixlen_str) + if not (0 <= prefixlen <= self._max_prefixlen): + self._report_invalid_netmask(prefixlen_str) + return prefixlen + + def _prefix_from_ip_string(self, ip_str): + """Turn a netmask/hostmask string into a prefix length + + Args: + ip_str: The netmask/hostmask to be converted + + Returns: + An integer, the prefix length. + + Raises: + NetmaskValueError: If the input is not a valid netmask/hostmask + """ + # Parse the netmask/hostmask like an IP address. + try: + ip_int = self._ip_int_from_string(ip_str) + except AddressValueError: + self._report_invalid_netmask(ip_str) + + # Try matching a netmask (this would be /1*0*/ as a bitwise regexp). + # Note that the two ambiguous cases (all-ones and all-zeroes) are + # treated as netmasks. + try: + return self._prefix_from_ip_int(ip_int) + except ValueError: + pass + + # Invert the bits, and try matching a /0+1+/ hostmask instead. + ip_int ^= self._ALL_ONES + try: + return self._prefix_from_ip_int(ip_int) + except ValueError: + self._report_invalid_netmask(ip_str) + + +class _BaseAddress(_IPAddressBase): + + """A generic IP object. + + This IP class contains the version independent methods which are + used by single IP addresses. + """ + + def __init__(self, address): + if (not isinstance(address, bytes) + and '/' in str(address)): + raise AddressValueError("Unexpected '/' in %r" % address) + + def __int__(self): + return self._ip + + def __eq__(self, other): + try: + return (self._ip == other._ip + and self._version == other._version) + except AttributeError: + return NotImplemented + + def __lt__(self, other): + if self._version != other._version: + raise TypeError('%s and %s are not of the same version' % ( + self, other)) + if not isinstance(other, _BaseAddress): + raise TypeError('%s and %s are not of the same type' % ( + self, other)) + if self._ip != other._ip: + return self._ip < other._ip + return False + + # Shorthand for Integer addition and subtraction. This is not + # meant to ever support addition/subtraction of addresses. + def __add__(self, other): + if not isinstance(other, int): + return NotImplemented + return self.__class__(int(self) + other) + + def __sub__(self, other): + if not isinstance(other, int): + return NotImplemented + return self.__class__(int(self) - other) + + def __repr__(self): + return '%s(%r)' % (self.__class__.__name__, str(self)) + + def __str__(self): + return str(self._string_from_ip_int(self._ip)) + + def __hash__(self): + return hash(hex(int(self._ip))) + + def _get_address_key(self): + return (self._version, self) + + +class _BaseNetwork(_IPAddressBase): + + """A generic IP network object. + + This IP class contains the version independent methods which are + used by networks. + + """ + def __init__(self, address): + self._cache = {} + + def __repr__(self): + return '%s(%r)' % (self.__class__.__name__, str(self)) + + def __str__(self): + return '%s/%d' % (self.network_address, self.prefixlen) + + def hosts(self): + """Generate Iterator over usable hosts in a network. + + This is like __iter__ except it doesn't return the network + or broadcast addresses. + + """ + network = int(self.network_address) + broadcast = int(self.broadcast_address) + for x in long_range(network + 1, broadcast): + yield self._address_class(x) + + def __iter__(self): + network = int(self.network_address) + broadcast = int(self.broadcast_address) + for x in long_range(network, broadcast + 1): + yield self._address_class(x) + + def __getitem__(self, n): + network = int(self.network_address) + broadcast = int(self.broadcast_address) + if n >= 0: + if network + n > broadcast: + raise IndexError + return self._address_class(network + n) + else: + n += 1 + if broadcast + n < network: + raise IndexError + return self._address_class(broadcast + n) + + def __lt__(self, other): + if self._version != other._version: + raise TypeError('%s and %s are not of the same version' % ( + self, other)) + if not isinstance(other, _BaseNetwork): + raise TypeError('%s and %s are not of the same type' % ( + self, other)) + if self.network_address != other.network_address: + return self.network_address < other.network_address + if self.netmask != other.netmask: + return self.netmask < other.netmask + return False + + def __eq__(self, other): + try: + return (self._version == other._version and + self.network_address == other.network_address and + int(self.netmask) == int(other.netmask)) + except AttributeError: + return NotImplemented + + def __hash__(self): + return hash(int(self.network_address) ^ int(self.netmask)) + + def __contains__(self, other): + # always false if one is v4 and the other is v6. + if self._version != other._version: + return False + # dealing with another network. + if isinstance(other, _BaseNetwork): + return False + # dealing with another address + else: + # address + return (int(self.network_address) <= int(other._ip) <= + int(self.broadcast_address)) + + def overlaps(self, other): + """Tell if self is partly contained in other.""" + return self.network_address in other or ( + self.broadcast_address in other or ( + other.network_address in self or ( + other.broadcast_address in self))) + + @property + def broadcast_address(self): + x = self._cache.get('broadcast_address') + if x is None: + x = self._address_class(int(self.network_address) | + int(self.hostmask)) + self._cache['broadcast_address'] = x + return x + + @property + def hostmask(self): + x = self._cache.get('hostmask') + if x is None: + x = self._address_class(int(self.netmask) ^ self._ALL_ONES) + self._cache['hostmask'] = x + return x + + @property + def with_prefixlen(self): + return '%s/%d' % (self.network_address, self._prefixlen) + + @property + def with_netmask(self): + return '%s/%s' % (self.network_address, self.netmask) + + @property + def with_hostmask(self): + return '%s/%s' % (self.network_address, self.hostmask) + + @property + def num_addresses(self): + """Number of hosts in the current subnet.""" + return int(self.broadcast_address) - int(self.network_address) + 1 + + @property + def _address_class(self): + # Returning bare address objects (rather than interfaces) allows for + # more consistent behaviour across the network address, broadcast + # address and individual host addresses. + msg = '%200s has no associated address class' % (type(self),) + raise NotImplementedError(msg) + + @property + def prefixlen(self): + return self._prefixlen + + def address_exclude(self, other): + """Remove an address from a larger block. + + For example: + + addr1 = ip_network('192.0.2.0/28') + addr2 = ip_network('192.0.2.1/32') + addr1.address_exclude(addr2) = + [IPv4Network('192.0.2.0/32'), IPv4Network('192.0.2.2/31'), + IPv4Network('192.0.2.4/30'), IPv4Network('192.0.2.8/29')] + + or IPv6: + + addr1 = ip_network('2001:db8::1/32') + addr2 = ip_network('2001:db8::1/128') + addr1.address_exclude(addr2) = + [ip_network('2001:db8::1/128'), + ip_network('2001:db8::2/127'), + ip_network('2001:db8::4/126'), + ip_network('2001:db8::8/125'), + ... + ip_network('2001:db8:8000::/33')] + + Args: + other: An IPv4Network or IPv6Network object of the same type. + + Returns: + An iterator of the IPv(4|6)Network objects which is self + minus other. + + Raises: + TypeError: If self and other are of differing address + versions, or if other is not a network object. + ValueError: If other is not completely contained by self. + + """ + if not self._version == other._version: + raise TypeError("%s and %s are not of the same version" % ( + self, other)) + + if not isinstance(other, _BaseNetwork): + raise TypeError("%s is not a network object" % other) + + if not (other.network_address >= self.network_address and + other.broadcast_address <= self.broadcast_address): + raise ValueError('%s not contained in %s' % (other, self)) + if other == self: + raise StopIteration + + # Make sure we're comparing the network of other. + other = other.__class__('%s/%s' % (other.network_address, + other.prefixlen)) + + s1, s2 = self.subnets() + while s1 != other and s2 != other: + if (other.network_address >= s1.network_address and + other.broadcast_address <= s1.broadcast_address): + yield s2 + s1, s2 = s1.subnets() + elif (other.network_address >= s2.network_address and + other.broadcast_address <= s2.broadcast_address): + yield s1 + s1, s2 = s2.subnets() + else: + # If we got here, there's a bug somewhere. + raise AssertionError('Error performing exclusion: ' + 's1: %s s2: %s other: %s' % + (s1, s2, other)) + if s1 == other: + yield s2 + elif s2 == other: + yield s1 + else: + # If we got here, there's a bug somewhere. + raise AssertionError('Error performing exclusion: ' + 's1: %s s2: %s other: %s' % + (s1, s2, other)) + + def compare_networks(self, other): + """Compare two IP objects. + + This is only concerned about the comparison of the integer + representation of the network addresses. This means that the + host bits aren't considered at all in this method. If you want + to compare host bits, you can easily enough do a + 'HostA._ip < HostB._ip' + + Args: + other: An IP object. + + Returns: + If the IP versions of self and other are the same, returns: + + -1 if self < other: + eg: IPv4Network('192.0.2.0/25') < IPv4Network('192.0.2.128/25') + IPv6Network('2001:db8::1000/124') < + IPv6Network('2001:db8::2000/124') + 0 if self == other + eg: IPv4Network('192.0.2.0/24') == IPv4Network('192.0.2.0/24') + IPv6Network('2001:db8::1000/124') == + IPv6Network('2001:db8::1000/124') + 1 if self > other + eg: IPv4Network('192.0.2.128/25') > IPv4Network('192.0.2.0/25') + IPv6Network('2001:db8::2000/124') > + IPv6Network('2001:db8::1000/124') + + Raises: + TypeError if the IP versions are different. + + """ + # does this need to raise a ValueError? + if self._version != other._version: + raise TypeError('%s and %s are not of the same type' % ( + self, other)) + # self._version == other._version below here: + if self.network_address < other.network_address: + return -1 + if self.network_address > other.network_address: + return 1 + # self.network_address == other.network_address below here: + if self.netmask < other.netmask: + return -1 + if self.netmask > other.netmask: + return 1 + return 0 + + def _get_networks_key(self): + """Network-only key function. + + Returns an object that identifies this address' network and + netmask. This function is a suitable "key" argument for sorted() + and list.sort(). + + """ + return (self._version, self.network_address, self.netmask) + + def subnets(self, prefixlen_diff=1, new_prefix=None): + """The subnets which join to make the current subnet. + + In the case that self contains only one IP + (self._prefixlen == 32 for IPv4 or self._prefixlen == 128 + for IPv6), yield an iterator with just ourself. + + Args: + prefixlen_diff: An integer, the amount the prefix length + should be increased by. This should not be set if + new_prefix is also set. + new_prefix: The desired new prefix length. This must be a + larger number (smaller prefix) than the existing prefix. + This should not be set if prefixlen_diff is also set. + + Returns: + An iterator of IPv(4|6) objects. + + Raises: + ValueError: The prefixlen_diff is too small or too large. + OR + prefixlen_diff and new_prefix are both set or new_prefix + is a smaller number than the current prefix (smaller + number means a larger network) + + """ + if self._prefixlen == self._max_prefixlen: + yield self + return + + if new_prefix is not None: + if new_prefix < self._prefixlen: + raise ValueError('new prefix must be longer') + if prefixlen_diff != 1: + raise ValueError('cannot set prefixlen_diff and new_prefix') + prefixlen_diff = new_prefix - self._prefixlen + + if prefixlen_diff < 0: + raise ValueError('prefix length diff must be > 0') + new_prefixlen = self._prefixlen + prefixlen_diff + + if new_prefixlen > self._max_prefixlen: + raise ValueError( + 'prefix length diff %d is invalid for netblock %s' % ( + new_prefixlen, self)) + + first = self.__class__('%s/%s' % + (self.network_address, + self._prefixlen + prefixlen_diff)) + + yield first + current = first + while True: + broadcast = current.broadcast_address + if broadcast == self.broadcast_address: + return + new_addr = self._address_class(int(broadcast) + 1) + current = self.__class__('%s/%s' % (new_addr, + new_prefixlen)) + + yield current + + def supernet(self, prefixlen_diff=1, new_prefix=None): + """The supernet containing the current network. + + Args: + prefixlen_diff: An integer, the amount the prefix length of + the network should be decreased by. For example, given a + /24 network and a prefixlen_diff of 3, a supernet with a + /21 netmask is returned. + + Returns: + An IPv4 network object. + + Raises: + ValueError: If self.prefixlen - prefixlen_diff < 0. I.e., you have + a negative prefix length. + OR + If prefixlen_diff and new_prefix are both set or new_prefix is a + larger number than the current prefix (larger number means a + smaller network) + + """ + if self._prefixlen == 0: + return self + + if new_prefix is not None: + if new_prefix > self._prefixlen: + raise ValueError('new prefix must be shorter') + if prefixlen_diff != 1: + raise ValueError('cannot set prefixlen_diff and new_prefix') + prefixlen_diff = self._prefixlen - new_prefix + + if self.prefixlen - prefixlen_diff < 0: + raise ValueError( + 'current prefixlen is %d, cannot have a prefixlen_diff of %d' % + (self.prefixlen, prefixlen_diff)) + # TODO (pmoody): optimize this. + t = self.__class__('%s/%d' % (self.network_address, + self.prefixlen - prefixlen_diff), + strict=False) + return t.__class__('%s/%d' % (t.network_address, t.prefixlen)) + + @property + def is_multicast(self): + """Test if the address is reserved for multicast use. + + Returns: + A boolean, True if the address is a multicast address. + See RFC 2373 2.7 for details. + + """ + return (self.network_address.is_multicast and + self.broadcast_address.is_multicast) + + @property + def is_reserved(self): + """Test if the address is otherwise IETF reserved. + + Returns: + A boolean, True if the address is within one of the + reserved IPv6 Network ranges. + + """ + return (self.network_address.is_reserved and + self.broadcast_address.is_reserved) + + @property + def is_link_local(self): + """Test if the address is reserved for link-local. + + Returns: + A boolean, True if the address is reserved per RFC 4291. + + """ + return (self.network_address.is_link_local and + self.broadcast_address.is_link_local) + + @property + def is_private(self): + """Test if this address is allocated for private networks. + + Returns: + A boolean, True if the address is reserved per + iana-ipv4-special-registry or iana-ipv6-special-registry. + + """ + return (self.network_address.is_private and + self.broadcast_address.is_private) + + @property + def is_global(self): + """Test if this address is allocated for public networks. + + Returns: + A boolean, True if the address is not reserved per + iana-ipv4-special-registry or iana-ipv6-special-registry. + + """ + return not self.is_private + + @property + def is_unspecified(self): + """Test if the address is unspecified. + + Returns: + A boolean, True if this is the unspecified address as defined in + RFC 2373 2.5.2. + + """ + return (self.network_address.is_unspecified and + self.broadcast_address.is_unspecified) + + @property + def is_loopback(self): + """Test if the address is a loopback address. + + Returns: + A boolean, True if the address is a loopback address as defined in + RFC 2373 2.5.3. + + """ + return (self.network_address.is_loopback and + self.broadcast_address.is_loopback) + + +class _BaseV4(object): + + """Base IPv4 object. + + The following methods are used by IPv4 objects in both single IP + addresses and networks. + + """ + + # Equivalent to 255.255.255.255 or 32 bits of 1's. + _ALL_ONES = (2**IPV4LENGTH) - 1 + _DECIMAL_DIGITS = frozenset('0123456789') + + # the valid octets for host and netmasks. only useful for IPv4. + _valid_mask_octets = frozenset((255, 254, 252, 248, 240, 224, 192, 128, 0)) + + def __init__(self, address): + self._version = 4 + self._max_prefixlen = IPV4LENGTH + + def _explode_shorthand_ip_string(self): + return str(self) + + def _ip_int_from_string(self, ip_str): + """Turn the given IP string into an integer for comparison. + + Args: + ip_str: A string, the IP ip_str. + + Returns: + The IP ip_str as an integer. + + Raises: + AddressValueError: if ip_str isn't a valid IPv4 Address. + + """ + if not ip_str: + raise AddressValueError('Address cannot be empty') + + octets = ip_str.split('.') + if len(octets) != 4: + raise AddressValueError("Expected 4 octets in %r" % ip_str) + + try: + return _int_from_bytes(map(self._parse_octet, octets), 'big') + except ValueError as exc: + raise AddressValueError("%s in %r" % (exc, ip_str)) + + def _parse_octet(self, octet_str): + """Convert a decimal octet into an integer. + + Args: + octet_str: A string, the number to parse. + + Returns: + The octet as an integer. + + Raises: + ValueError: if the octet isn't strictly a decimal from [0..255]. + + """ + if not octet_str: + raise ValueError("Empty octet not permitted") + # Whitelist the characters, since int() allows a lot of bizarre stuff. + if not self._DECIMAL_DIGITS.issuperset(octet_str): + msg = "Only decimal digits permitted in %r" + raise ValueError(msg % octet_str) + # We do the length check second, since the invalid character error + # is likely to be more informative for the user + if len(octet_str) > 3: + msg = "At most 3 characters permitted in %r" + raise ValueError(msg % octet_str) + # Convert to integer (we know digits are legal) + octet_int = int(octet_str, 10) + # Any octets that look like they *might* be written in octal, + # and which don't look exactly the same in both octal and + # decimal are rejected as ambiguous + if octet_int > 7 and octet_str[0] == '0': + msg = "Ambiguous (octal/decimal) value in %r not permitted" + raise ValueError(msg % octet_str) + if octet_int > 255: + raise ValueError("Octet %d (> 255) not permitted" % octet_int) + return octet_int + + def _string_from_ip_int(self, ip_int): + """Turns a 32-bit integer into dotted decimal notation. + + Args: + ip_int: An integer, the IP address. + + Returns: + The IP address as a string in dotted decimal notation. + + """ + return '.'.join(map(str, _int_to_bytes(ip_int, 4, 'big'))) + + def _is_valid_netmask(self, netmask): + """Verify that the netmask is valid. + + Args: + netmask: A string, either a prefix or dotted decimal + netmask. + + Returns: + A boolean, True if the prefix represents a valid IPv4 + netmask. + + """ + mask = netmask.split('.') + if len(mask) == 4: + try: + for x in mask: + if int(x) not in self._valid_mask_octets: + return False + except ValueError: + # Found something that isn't an integer or isn't valid + return False + for idx, y in enumerate(mask): + if idx > 0 and y > mask[idx - 1]: + return False + return True + try: + netmask = int(netmask) + except ValueError: + return False + return 0 <= netmask <= self._max_prefixlen + + def _is_hostmask(self, ip_str): + """Test if the IP string is a hostmask (rather than a netmask). + + Args: + ip_str: A string, the potential hostmask. + + Returns: + A boolean, True if the IP string is a hostmask. + + """ + bits = ip_str.split('.') + try: + parts = [x for x in map(int, bits) if x in self._valid_mask_octets] + except ValueError: + return False + if len(parts) != len(bits): + return False + if parts[0] < parts[-1]: + return True + return False + + @property + def max_prefixlen(self): + return self._max_prefixlen + + @property + def version(self): + return self._version + + +class IPv4Address(_BaseV4, _BaseAddress): + + """Represent and manipulate single IPv4 Addresses.""" + + def __init__(self, address): + + """ + Args: + address: A string or integer representing the IP + + Additionally, an integer can be passed, so + IPv4Address('192.0.2.1') == IPv4Address(3221225985). + or, more generally + IPv4Address(int(IPv4Address('192.0.2.1'))) == + IPv4Address('192.0.2.1') + + Raises: + AddressValueError: If ipaddress isn't a valid IPv4 address. + + """ + _BaseAddress.__init__(self, address) + _BaseV4.__init__(self, address) + + # Efficient constructor from integer. + if isinstance(address, int): + self._check_int_address(address) + self._ip = address + return + + # Constructing from a packed address + if isinstance(address, bytes): + self._check_packed_address(address, 4) + self._ip = _int_from_bytes(address, 'big') + return + + # Assume input argument to be string or any object representation + # which converts into a formatted IP string. + addr_str = str(address) + self._ip = self._ip_int_from_string(addr_str) + + @property + def packed(self): + """The binary representation of this address.""" + return v4_int_to_packed(self._ip) + + @property + def is_reserved(self): + """Test if the address is otherwise IETF reserved. + + Returns: + A boolean, True if the address is within the + reserved IPv4 Network range. + + """ + reserved_network = IPv4Network('240.0.0.0/4') + return self in reserved_network + + @property + def is_private(self): + """Test if this address is allocated for private networks. + + Returns: + A boolean, True if the address is reserved per + iana-ipv4-special-registry. + + """ + return (self in IPv4Network('0.0.0.0/8') or + self in IPv4Network('10.0.0.0/8') or + self in IPv4Network('127.0.0.0/8') or + self in IPv4Network('169.254.0.0/16') or + self in IPv4Network('172.16.0.0/12') or + self in IPv4Network('192.0.0.0/29') or + self in IPv4Network('192.0.0.170/31') or + self in IPv4Network('192.0.2.0/24') or + self in IPv4Network('192.168.0.0/16') or + self in IPv4Network('198.18.0.0/15') or + self in IPv4Network('198.51.100.0/24') or + self in IPv4Network('203.0.113.0/24') or + self in IPv4Network('240.0.0.0/4') or + self in IPv4Network('255.255.255.255/32')) + + + @property + def is_multicast(self): + """Test if the address is reserved for multicast use. + + Returns: + A boolean, True if the address is multicast. + See RFC 3171 for details. + + """ + multicast_network = IPv4Network('224.0.0.0/4') + return self in multicast_network + + @property + def is_unspecified(self): + """Test if the address is unspecified. + + Returns: + A boolean, True if this is the unspecified address as defined in + RFC 5735 3. + + """ + unspecified_address = IPv4Address('0.0.0.0') + return self == unspecified_address + + @property + def is_loopback(self): + """Test if the address is a loopback address. + + Returns: + A boolean, True if the address is a loopback per RFC 3330. + + """ + loopback_network = IPv4Network('127.0.0.0/8') + return self in loopback_network + + @property + def is_link_local(self): + """Test if the address is reserved for link-local. + + Returns: + A boolean, True if the address is link-local per RFC 3927. + + """ + linklocal_network = IPv4Network('169.254.0.0/16') + return self in linklocal_network + + +class IPv4Interface(IPv4Address): + + def __init__(self, address): + if isinstance(address, (bytes, int)): + IPv4Address.__init__(self, address) + self.network = IPv4Network(self._ip) + self._prefixlen = self._max_prefixlen + return + + addr = _split_optional_netmask(address) + IPv4Address.__init__(self, addr[0]) + + self.network = IPv4Network(address, strict=False) + self._prefixlen = self.network._prefixlen + + self.netmask = self.network.netmask + self.hostmask = self.network.hostmask + + def __str__(self): + return '%s/%d' % (self._string_from_ip_int(self._ip), + self.network.prefixlen) + + def __eq__(self, other): + address_equal = IPv4Address.__eq__(self, other) + if not address_equal or address_equal is NotImplemented: + return address_equal + try: + return self.network == other.network + except AttributeError: + # An interface with an associated network is NOT the + # same as an unassociated address. That's why the hash + # takes the extra info into account. + return False + + def __lt__(self, other): + address_less = IPv4Address.__lt__(self, other) + if address_less is NotImplemented: + return NotImplemented + try: + return self.network < other.network + except AttributeError: + # We *do* allow addresses and interfaces to be sorted. The + # unassociated address is considered less than all interfaces. + return False + + def __hash__(self): + return self._ip ^ self._prefixlen ^ int(self.network.network_address) + + @property + def ip(self): + return IPv4Address(self._ip) + + @property + def with_prefixlen(self): + return '%s/%s' % (self._string_from_ip_int(self._ip), + self._prefixlen) + + @property + def with_netmask(self): + return '%s/%s' % (self._string_from_ip_int(self._ip), + self.netmask) + + @property + def with_hostmask(self): + return '%s/%s' % (self._string_from_ip_int(self._ip), + self.hostmask) + + +class IPv4Network(_BaseV4, _BaseNetwork): + + """This class represents and manipulates 32-bit IPv4 network + addresses.. + + Attributes: [examples for IPv4Network('192.0.2.0/27')] + .network_address: IPv4Address('192.0.2.0') + .hostmask: IPv4Address('0.0.0.31') + .broadcast_address: IPv4Address('192.0.2.32') + .netmask: IPv4Address('255.255.255.224') + .prefixlen: 27 + + """ + # Class to use when creating address objects + _address_class = IPv4Address + + def __init__(self, address, strict=True): + + """Instantiate a new IPv4 network object. + + Args: + address: A string or integer representing the IP [& network]. + '192.0.2.0/24' + '192.0.2.0/255.255.255.0' + '192.0.0.2/0.0.0.255' + are all functionally the same in IPv4. Similarly, + '192.0.2.1' + '192.0.2.1/255.255.255.255' + '192.0.2.1/32' + are also functionally equivalent. That is to say, failing to + provide a subnetmask will create an object with a mask of /32. + + If the mask (portion after the / in the argument) is given in + dotted quad form, it is treated as a netmask if it starts with a + non-zero field (e.g. /255.0.0.0 == /8) and as a hostmask if it + starts with a zero field (e.g. 0.255.255.255 == /8), with the + single exception of an all-zero mask which is treated as a + netmask == /0. If no mask is given, a default of /32 is used. + + Additionally, an integer can be passed, so + IPv4Network('192.0.2.1') == IPv4Network(3221225985) + or, more generally + IPv4Interface(int(IPv4Interface('192.0.2.1'))) == + IPv4Interface('192.0.2.1') + + Raises: + AddressValueError: If ipaddress isn't a valid IPv4 address. + NetmaskValueError: If the netmask isn't valid for + an IPv4 address. + ValueError: If strict is True and a network address is not + supplied. + + """ + + _BaseV4.__init__(self, address) + _BaseNetwork.__init__(self, address) + + # Constructing from a packed address + if isinstance(address, bytes): + self.network_address = IPv4Address(address) + self._prefixlen = self._max_prefixlen + self.netmask = IPv4Address(self._ALL_ONES) + #fixme: address/network test here + return + + # Efficient constructor from integer. + if isinstance(address, int): + self.network_address = IPv4Address(address) + self._prefixlen = self._max_prefixlen + self.netmask = IPv4Address(self._ALL_ONES) + #fixme: address/network test here. + return + + # Assume input argument to be string or any object representation + # which converts into a formatted IP prefix string. + addr = _split_optional_netmask(address) + self.network_address = IPv4Address(self._ip_int_from_string(addr[0])) + + if len(addr) == 2: + try: + # Check for a netmask in prefix length form + self._prefixlen = self._prefix_from_prefix_string(addr[1]) + except NetmaskValueError: + # Check for a netmask or hostmask in dotted-quad form. + # This may raise NetmaskValueError. + self._prefixlen = self._prefix_from_ip_string(addr[1]) + else: + self._prefixlen = self._max_prefixlen + self.netmask = IPv4Address(self._ip_int_from_prefix(self._prefixlen)) + + if strict: + if (IPv4Address(int(self.network_address) & int(self.netmask)) != + self.network_address): + raise ValueError('%s has host bits set' % self) + self.network_address = IPv4Address(int(self.network_address) & + int(self.netmask)) + + if self._prefixlen == (self._max_prefixlen - 1): + self.hosts = self.__iter__ + + @property + def is_global(self): + """Test if this address is allocated for public networks. + + Returns: + A boolean, True if the address is not reserved per + iana-ipv4-special-registry. + + """ + return (not (self.network_address in IPv4Network('100.64.0.0/10') and + self.broadcast_address in IPv4Network('100.64.0.0/10')) and + not self.is_private) + + + +class _BaseV6(object): + + """Base IPv6 object. + + The following methods are used by IPv6 objects in both single IP + addresses and networks. + + """ + + _ALL_ONES = (2**IPV6LENGTH) - 1 + _HEXTET_COUNT = 8 + _HEX_DIGITS = frozenset('0123456789ABCDEFabcdef') + + def __init__(self, address): + self._version = 6 + self._max_prefixlen = IPV6LENGTH + + def _ip_int_from_string(self, ip_str): + """Turn an IPv6 ip_str into an integer. + + Args: + ip_str: A string, the IPv6 ip_str. + + Returns: + An int, the IPv6 address + + Raises: + AddressValueError: if ip_str isn't a valid IPv6 Address. + + """ + if not ip_str: + raise AddressValueError('Address cannot be empty') + + parts = ip_str.split(':') + + # An IPv6 address needs at least 2 colons (3 parts). + _min_parts = 3 + if len(parts) < _min_parts: + msg = "At least %d parts expected in %r" % (_min_parts, ip_str) + raise AddressValueError(msg) + + # If the address has an IPv4-style suffix, convert it to hexadecimal. + if '.' in parts[-1]: + try: + ipv4_int = IPv4Address(parts.pop())._ip + except AddressValueError as exc: + raise AddressValueError("%s in %r" % (exc, ip_str)) + parts.append('%x' % ((ipv4_int >> 16) & 0xFFFF)) + parts.append('%x' % (ipv4_int & 0xFFFF)) + + # An IPv6 address can't have more than 8 colons (9 parts). + # The extra colon comes from using the "::" notation for a single + # leading or trailing zero part. + _max_parts = self._HEXTET_COUNT + 1 + if len(parts) > _max_parts: + msg = "At most %d colons permitted in %r" % (_max_parts-1, ip_str) + raise AddressValueError(msg) + + # Disregarding the endpoints, find '::' with nothing in between. + # This indicates that a run of zeroes has been skipped. + skip_index = None + for i in range(1, len(parts) - 1): + if not parts[i]: + if skip_index is not None: + # Can't have more than one '::' + msg = "At most one '::' permitted in %r" % ip_str + raise AddressValueError(msg) + skip_index = i + + # parts_hi is the number of parts to copy from above/before the '::' + # parts_lo is the number of parts to copy from below/after the '::' + if skip_index is not None: + # If we found a '::', then check if it also covers the endpoints. + parts_hi = skip_index + parts_lo = len(parts) - skip_index - 1 + if not parts[0]: + parts_hi -= 1 + if parts_hi: + msg = "Leading ':' only permitted as part of '::' in %r" + raise AddressValueError(msg % ip_str) # ^: requires ^:: + if not parts[-1]: + parts_lo -= 1 + if parts_lo: + msg = "Trailing ':' only permitted as part of '::' in %r" + raise AddressValueError(msg % ip_str) # :$ requires ::$ + parts_skipped = self._HEXTET_COUNT - (parts_hi + parts_lo) + if parts_skipped < 1: + msg = "Expected at most %d other parts with '::' in %r" + raise AddressValueError(msg % (self._HEXTET_COUNT-1, ip_str)) + else: + # Otherwise, allocate the entire address to parts_hi. The + # endpoints could still be empty, but _parse_hextet() will check + # for that. + if len(parts) != self._HEXTET_COUNT: + msg = "Exactly %d parts expected without '::' in %r" + raise AddressValueError(msg % (self._HEXTET_COUNT, ip_str)) + if not parts[0]: + msg = "Leading ':' only permitted as part of '::' in %r" + raise AddressValueError(msg % ip_str) # ^: requires ^:: + if not parts[-1]: + msg = "Trailing ':' only permitted as part of '::' in %r" + raise AddressValueError(msg % ip_str) # :$ requires ::$ + parts_hi = len(parts) + parts_lo = 0 + parts_skipped = 0 + + try: + # Now, parse the hextets into a 128-bit integer. + ip_int = 0 + for i in range(parts_hi): + ip_int <<= 16 + ip_int |= self._parse_hextet(parts[i]) + ip_int <<= 16 * parts_skipped + for i in range(-parts_lo, 0): + ip_int <<= 16 + ip_int |= self._parse_hextet(parts[i]) + return ip_int + except ValueError as exc: + raise AddressValueError("%s in %r" % (exc, ip_str)) + + def _parse_hextet(self, hextet_str): + """Convert an IPv6 hextet string into an integer. + + Args: + hextet_str: A string, the number to parse. + + Returns: + The hextet as an integer. + + Raises: + ValueError: if the input isn't strictly a hex number from + [0..FFFF]. + + """ + # Whitelist the characters, since int() allows a lot of bizarre stuff. + if not self._HEX_DIGITS.issuperset(hextet_str): + raise ValueError("Only hex digits permitted in %r" % hextet_str) + # We do the length check second, since the invalid character error + # is likely to be more informative for the user + if len(hextet_str) > 4: + msg = "At most 4 characters permitted in %r" + raise ValueError(msg % hextet_str) + # Length check means we can skip checking the integer value + return int(hextet_str, 16) + + def _compress_hextets(self, hextets): + """Compresses a list of hextets. + + Compresses a list of strings, replacing the longest continuous + sequence of "0" in the list with "" and adding empty strings at + the beginning or at the end of the string such that subsequently + calling ":".join(hextets) will produce the compressed version of + the IPv6 address. + + Args: + hextets: A list of strings, the hextets to compress. + + Returns: + A list of strings. + + """ + best_doublecolon_start = -1 + best_doublecolon_len = 0 + doublecolon_start = -1 + doublecolon_len = 0 + for index, hextet in enumerate(hextets): + if hextet == '0': + doublecolon_len += 1 + if doublecolon_start == -1: + # Start of a sequence of zeros. + doublecolon_start = index + if doublecolon_len > best_doublecolon_len: + # This is the longest sequence of zeros so far. + best_doublecolon_len = doublecolon_len + best_doublecolon_start = doublecolon_start + else: + doublecolon_len = 0 + doublecolon_start = -1 + + if best_doublecolon_len > 1: + best_doublecolon_end = (best_doublecolon_start + + best_doublecolon_len) + # For zeros at the end of the address. + if best_doublecolon_end == len(hextets): + hextets += [''] + hextets[best_doublecolon_start:best_doublecolon_end] = [''] + # For zeros at the beginning of the address. + if best_doublecolon_start == 0: + hextets = [''] + hextets + + return hextets + + def _string_from_ip_int(self, ip_int=None): + """Turns a 128-bit integer into hexadecimal notation. + + Args: + ip_int: An integer, the IP address. + + Returns: + A string, the hexadecimal representation of the address. + + Raises: + ValueError: The address is bigger than 128 bits of all ones. + + """ + if ip_int is None: + ip_int = int(self._ip) + + if ip_int > self._ALL_ONES: + raise ValueError('IPv6 address is too large') + + hex_str = '%032x' % ip_int + hextets = ['%x' % int(hex_str[x:x+4], 16) for x in range(0, 32, 4)] + + hextets = self._compress_hextets(hextets) + return ':'.join(hextets) + + def _explode_shorthand_ip_string(self): + """Expand a shortened IPv6 address. + + Args: + ip_str: A string, the IPv6 address. + + Returns: + A string, the expanded IPv6 address. + + """ + if isinstance(self, IPv6Network): + ip_str = str(self.network_address) + elif isinstance(self, IPv6Interface): + ip_str = str(self.ip) + else: + ip_str = str(self) + + ip_int = self._ip_int_from_string(ip_str) + hex_str = '%032x' % ip_int + parts = [hex_str[x:x+4] for x in range(0, 32, 4)] + if isinstance(self, (_BaseNetwork, IPv6Interface)): + return '%s/%d' % (':'.join(parts), self._prefixlen) + return ':'.join(parts) + + @property + def max_prefixlen(self): + return self._max_prefixlen + + @property + def version(self): + return self._version + + +class IPv6Address(_BaseV6, _BaseAddress): + + """Represent and manipulate single IPv6 Addresses.""" + + def __init__(self, address): + """Instantiate a new IPv6 address object. + + Args: + address: A string or integer representing the IP + + Additionally, an integer can be passed, so + IPv6Address('2001:db8::') == + IPv6Address(42540766411282592856903984951653826560) + or, more generally + IPv6Address(int(IPv6Address('2001:db8::'))) == + IPv6Address('2001:db8::') + + Raises: + AddressValueError: If address isn't a valid IPv6 address. + + """ + _BaseAddress.__init__(self, address) + _BaseV6.__init__(self, address) + + # Efficient constructor from integer. + if isinstance(address, int): + self._check_int_address(address) + self._ip = address + return + + # Constructing from a packed address + if isinstance(address, bytes): + self._check_packed_address(address, 16) + self._ip = _int_from_bytes(address, 'big') + return + + # Assume input argument to be string or any object representation + # which converts into a formatted IP string. + addr_str = str(address) + self._ip = self._ip_int_from_string(addr_str) + + @property + def packed(self): + """The binary representation of this address.""" + return v6_int_to_packed(self._ip) + + @property + def is_multicast(self): + """Test if the address is reserved for multicast use. + + Returns: + A boolean, True if the address is a multicast address. + See RFC 2373 2.7 for details. + + """ + multicast_network = IPv6Network('ff00::/8') + return self in multicast_network + + @property + def is_reserved(self): + """Test if the address is otherwise IETF reserved. + + Returns: + A boolean, True if the address is within one of the + reserved IPv6 Network ranges. + + """ + reserved_networks = [IPv6Network('::/8'), IPv6Network('100::/8'), + IPv6Network('200::/7'), IPv6Network('400::/6'), + IPv6Network('800::/5'), IPv6Network('1000::/4'), + IPv6Network('4000::/3'), IPv6Network('6000::/3'), + IPv6Network('8000::/3'), IPv6Network('A000::/3'), + IPv6Network('C000::/3'), IPv6Network('E000::/4'), + IPv6Network('F000::/5'), IPv6Network('F800::/6'), + IPv6Network('FE00::/9')] + + return any(self in x for x in reserved_networks) + + @property + def is_link_local(self): + """Test if the address is reserved for link-local. + + Returns: + A boolean, True if the address is reserved per RFC 4291. + + """ + linklocal_network = IPv6Network('fe80::/10') + return self in linklocal_network + + @property + def is_site_local(self): + """Test if the address is reserved for site-local. + + Note that the site-local address space has been deprecated by RFC 3879. + Use is_private to test if this address is in the space of unique local + addresses as defined by RFC 4193. + + Returns: + A boolean, True if the address is reserved per RFC 3513 2.5.6. + + """ + sitelocal_network = IPv6Network('fec0::/10') + return self in sitelocal_network + + @property + def is_private(self): + """Test if this address is allocated for private networks. + + Returns: + A boolean, True if the address is reserved per + iana-ipv6-special-registry. + + """ + return (self in IPv6Network('::1/128') or + self in IPv6Network('::/128') or + self in IPv6Network('::ffff:0:0/96') or + self in IPv6Network('100::/64') or + self in IPv6Network('2001::/23') or + self in IPv6Network('2001:2::/48') or + self in IPv6Network('2001:db8::/32') or + self in IPv6Network('2001:10::/28') or + self in IPv6Network('fc00::/7') or + self in IPv6Network('fe80::/10')) + + @property + def is_global(self): + """Test if this address is allocated for public networks. + + Returns: + A boolean, true if the address is not reserved per + iana-ipv6-special-registry. + + """ + return not self.is_private + + @property + def is_unspecified(self): + """Test if the address is unspecified. + + Returns: + A boolean, True if this is the unspecified address as defined in + RFC 2373 2.5.2. + + """ + return self._ip == 0 + + @property + def is_loopback(self): + """Test if the address is a loopback address. + + Returns: + A boolean, True if the address is a loopback address as defined in + RFC 2373 2.5.3. + + """ + return self._ip == 1 + + @property + def ipv4_mapped(self): + """Return the IPv4 mapped address. + + Returns: + If the IPv6 address is a v4 mapped address, return the + IPv4 mapped address. Return None otherwise. + + """ + if (self._ip >> 32) != 0xFFFF: + return None + return IPv4Address(self._ip & 0xFFFFFFFF) + + @property + def teredo(self): + """Tuple of embedded teredo IPs. + + Returns: + Tuple of the (server, client) IPs or None if the address + doesn't appear to be a teredo address (doesn't start with + 2001::/32) + + """ + if (self._ip >> 96) != 0x20010000: + return None + return (IPv4Address((self._ip >> 64) & 0xFFFFFFFF), + IPv4Address(~self._ip & 0xFFFFFFFF)) + + @property + def sixtofour(self): + """Return the IPv4 6to4 embedded address. + + Returns: + The IPv4 6to4-embedded address if present or None if the + address doesn't appear to contain a 6to4 embedded address. + + """ + if (self._ip >> 112) != 0x2002: + return None + return IPv4Address((self._ip >> 80) & 0xFFFFFFFF) + + +class IPv6Interface(IPv6Address): + + def __init__(self, address): + if isinstance(address, (bytes, int)): + IPv6Address.__init__(self, address) + self.network = IPv6Network(self._ip) + self._prefixlen = self._max_prefixlen + return + + addr = _split_optional_netmask(address) + IPv6Address.__init__(self, addr[0]) + self.network = IPv6Network(address, strict=False) + self.netmask = self.network.netmask + self._prefixlen = self.network._prefixlen + self.hostmask = self.network.hostmask + + def __str__(self): + return '%s/%d' % (self._string_from_ip_int(self._ip), + self.network.prefixlen) + + def __eq__(self, other): + address_equal = IPv6Address.__eq__(self, other) + if not address_equal or address_equal is NotImplemented: + return address_equal + try: + return self.network == other.network + except AttributeError: + # An interface with an associated network is NOT the + # same as an unassociated address. That's why the hash + # takes the extra info into account. + return False + + def __lt__(self, other): + address_less = IPv6Address.__lt__(self, other) + if address_less is NotImplemented: + return NotImplemented + try: + return self.network < other.network + except AttributeError: + # We *do* allow addresses and interfaces to be sorted. The + # unassociated address is considered less than all interfaces. + return False + + def __hash__(self): + return self._ip ^ self._prefixlen ^ int(self.network.network_address) + + @property + def ip(self): + return IPv6Address(self._ip) + + @property + def with_prefixlen(self): + return '%s/%s' % (self._string_from_ip_int(self._ip), + self._prefixlen) + + @property + def with_netmask(self): + return '%s/%s' % (self._string_from_ip_int(self._ip), + self.netmask) + + @property + def with_hostmask(self): + return '%s/%s' % (self._string_from_ip_int(self._ip), + self.hostmask) + + @property + def is_unspecified(self): + return self._ip == 0 and self.network.is_unspecified + + @property + def is_loopback(self): + return self._ip == 1 and self.network.is_loopback + + +class IPv6Network(_BaseV6, _BaseNetwork): + + """This class represents and manipulates 128-bit IPv6 networks. + + Attributes: [examples for IPv6('2001:db8::1000/124')] + .network_address: IPv6Address('2001:db8::1000') + .hostmask: IPv6Address('::f') + .broadcast_address: IPv6Address('2001:db8::100f') + .netmask: IPv6Address('ffff:ffff:ffff:ffff:ffff:ffff:ffff:fff0') + .prefixlen: 124 + + """ + + # Class to use when creating address objects + _address_class = IPv6Address + + def __init__(self, address, strict=True): + """Instantiate a new IPv6 Network object. + + Args: + address: A string or integer representing the IPv6 network or the + IP and prefix/netmask. + '2001:db8::/128' + '2001:db8:0000:0000:0000:0000:0000:0000/128' + '2001:db8::' + are all functionally the same in IPv6. That is to say, + failing to provide a subnetmask will create an object with + a mask of /128. + + Additionally, an integer can be passed, so + IPv6Network('2001:db8::') == + IPv6Network(42540766411282592856903984951653826560) + or, more generally + IPv6Network(int(IPv6Network('2001:db8::'))) == + IPv6Network('2001:db8::') + + strict: A boolean. If true, ensure that we have been passed + A true network address, eg, 2001:db8::1000/124 and not an + IP address on a network, eg, 2001:db8::1/124. + + Raises: + AddressValueError: If address isn't a valid IPv6 address. + NetmaskValueError: If the netmask isn't valid for + an IPv6 address. + ValueError: If strict was True and a network address was not + supplied. + + """ + _BaseV6.__init__(self, address) + _BaseNetwork.__init__(self, address) + + # Efficient constructor from integer. + if isinstance(address, int): + self.network_address = IPv6Address(address) + self._prefixlen = self._max_prefixlen + self.netmask = IPv6Address(self._ALL_ONES) + return + + # Constructing from a packed address + if isinstance(address, bytes): + self.network_address = IPv6Address(address) + self._prefixlen = self._max_prefixlen + self.netmask = IPv6Address(self._ALL_ONES) + return + + # Assume input argument to be string or any object representation + # which converts into a formatted IP prefix string. + addr = _split_optional_netmask(address) + + self.network_address = IPv6Address(self._ip_int_from_string(addr[0])) + + if len(addr) == 2: + # This may raise NetmaskValueError + self._prefixlen = self._prefix_from_prefix_string(addr[1]) + else: + self._prefixlen = self._max_prefixlen + + self.netmask = IPv6Address(self._ip_int_from_prefix(self._prefixlen)) + if strict: + if (IPv6Address(int(self.network_address) & int(self.netmask)) != + self.network_address): + raise ValueError('%s has host bits set' % self) + self.network_address = IPv6Address(int(self.network_address) & + int(self.netmask)) + + if self._prefixlen == (self._max_prefixlen - 1): + self.hosts = self.__iter__ + + @property + def is_site_local(self): + """Test if the address is reserved for site-local. + + Note that the site-local address space has been deprecated by RFC 3879. + Use is_private to test if this address is in the space of unique local + addresses as defined by RFC 4193. + + Returns: + A boolean, True if the address is reserved per RFC 3513 2.5.6. + + """ + return (self.network_address.is_site_local and + self.broadcast_address.is_site_local)