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- import re
- class IPAddress:
-
- _IP_NUMBER_REGEXP = r"(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)"
-
- IP_REGEXP = r"{0}\.{0}\.{0}\.{0}".format(_IP_NUMBER_REGEXP)
-
- def __init__(self, intlist):
- if not isinstance(intlist, list) or not all(isinstance(n, int) for n in intlist):
- raise TypeError("The first constructor argument must be an list of ints")
- if not len(intlist) == 4 or not all(0 <= n <= 255 for n in intlist):
- raise ValueError("The integer list must contain 4 ints in range of 0 and 255, like an ip-address")
-
- self.ipnum = int.from_bytes(bytes(intlist), "big")
-
- @staticmethod
- def parse(ip: str):
- match = re.match("^" + IPAddress.IP_REGEXP + "$", ip)
- if not match:
- raise ValueError("%s is no ipv4-address" % ip)
-
- numbers = [int(match.group(i)) for i in range(1, 5)]
- return IPAddress(numbers)
-
- @staticmethod
- def from_int(numeric: int):
- if numeric not in range(1 << 32):
- raise ValueError("numeric value must be in uint-range")
-
- return IPAddress(list(numeric.to_bytes(4, "big")))
-
- @staticmethod
- def is_ipv4(ip: str):
- match = re.match("^" + IPAddress.IP_REGEXP + "$", ip)
- return True if match else False
- def to_int(self):
- return self.ipnum
-
- def is_private(self):
- return ReservedIPBlocks.is_private(self)
-
- def get_private_segment(self):
- return ReservedIPBlocks.get_private_segment(self)
- def is_localhost(self):
- return ReservedIPBlocks.is_localhost(self)
-
- def is_multicast(self):
- return ReservedIPBlocks.is_multicast(self)
-
- def is_reserved(self):
- return ReservedIPBlocks.is_reserved(self)
-
- def is_zero_conf(self):
- return ReservedIPBlocks.is_zero_conf(self)
-
- def _tuple(self):
- return tuple(self.ipnum.to_bytes(4, "big"))
-
- def __repr__(self):
- return "IPAddress([%i, %i, %i, %i])" % self._tuple()
-
- def __str__(self):
- return "%i.%i.%i.%i" % self._tuple()
-
- def __hash__(self):
- return self.ipnum
-
- def __eq__(self, other):
- if other is None:
- return False
-
- return isinstance(other, IPAddress) and self.ipnum == other.ipnum
-
- def __lt__(self, other):
- if other is None:
- raise TypeError("Cannot compare to None")
- if not isinstance(other, IPAddress):
- raise NotImplemented
-
- return self.ipnum < other.ipnum
-
- def __int__(self):
- return self.ipnum
- class IPAddressBlock:
- CIDR_REGEXP = IPAddress.IP_REGEXP + r"(\/(3[0-2]|[12]?\d)|)?"
-
- def __init__(self, ip, netmask = 32):
- if isinstance(ip, str):
- ip = IPAddress.parse(ip)
- elif isinstance(ip, list):
- ip = IPAddress(ip)
-
- if not 1 <= netmask <= 32:
- raise ValueError("netmask must lie between 1 and 32")
-
- self.ipnum = ip.to_int() & self._bitmask(netmask)
- self.netmask = netmask
- self.last_ipnum = self.ipnum + self.block_size() - 1
- @staticmethod
- def parse(cidr: str):
- match = re.match("^" + IPAddressBlock.CIDR_REGEXP + "$", cidr)
- if not match:
- raise ValueError("%s is no valid cidr-notation" % cidr)
-
- ip = [int(match.group(i)) for i in range(1, 5)]
- suffix = 32 if not match.group(6) else int(match.group(6))
-
- return IPAddressBlock(ip, suffix)
-
- def block_size(self):
- return 2 ** (32 - self.netmask)
-
- def first_address(self):
- return IPAddress.from_int(self.ipnum)
- def last_address(self):
- return IPAddress.from_int(self.last_ipnum)
- def _bitmask(self, netmask):
- ones = lambda x: (1 << x) - 1
-
- return ones(32) ^ ones(32 - netmask)
-
- def __repr__(self):
- return "IPAddressBlock(%s, %i)" % (repr(IPAddress.from_int(self.ipnum)), self.netmask)
-
- def __self__(self):
- return IPAddress.from_int(self.ipnum) + "/" + str(self.netmask)
-
- def __contains__(self, ip):
- return (ip.to_int() & self._bitmask(self.netmask)) == self.ipnum
- class ReservedIPBlocks:
- PRIVATE_IP_SEGMENTS = [
- IPAddressBlock.parse(block)
- for block in
- ("10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16")
- ]
-
- LOCALHOST_SEGMENT = IPAddressBlock.parse("127.0.0.0/8")
-
- MULTICAST_SEGMENT = IPAddressBlock.parse("224.0.0.0/4")
- RESERVED_SEGMENT = IPAddressBlock.parse("240.0.0.0/4")
-
- ZERO_CONF_SEGMENT = IPAddressBlock.parse("169.254.0.0/16")
-
- @staticmethod
- def is_private(ip):
- return any(ip in block for block in ReservedIPBlocks.PRIVATE_IP_SEGMENTS)
-
- @staticmethod
- def get_private_segment(ip):
- if not ReservedIPBlocks.is_private(ip):
- raise ValueError("%s is not part of a private IP segment" % ip)
- for block in ReservedIPBlocks.PRIVATE_IP_SEGMENTS:
- if ip in block:
- return block
- @staticmethod
- def is_localhost(ip):
- return ip in ReservedIPBlocks.LOCALHOST_SEGMENT
-
- @staticmethod
- def is_multicast(ip):
- return ip in ReservedIPBlocks.MULTICAST_SEGMENT
-
- @staticmethod
- def is_reserved(ip):
- return ip in ReservedIPBlocks.RESERVED_SEGMENT
-
- @staticmethod
- def is_zero_conf(ip):
- return ip in ReservedIPBlocks.ZERO_CONF_SEGMENT
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