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# Licensed to the Apache Software Foundation (ASF) under one or more # contributor license agreements. See the NOTICE file distributed with # this work for additional information regarding copyright ownership. # The ASF licenses this file to You under the Apache License, Version 2.0 # (the "License"); you may not use this file except in compliance with # the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import socket import struct __all__ = [ 'is_private_subnet', 'is_public_subnet', 'is_valid_ip_address', 'join_ipv4_segments', 'increment_ipv4_segments' ] def is_private_subnet(ip): """ Utility function to check if an IP address is inside a private subnet. :type ip: ``str`` :param ip: IP address to check :return: ``bool`` if the specified IP address is private. """ priv_subnets = [{'subnet': '10.0.0.0', 'mask': '255.0.0.0'}, {'subnet': '172.16.0.0', 'mask': '255.240.0.0'}, {'subnet': '192.168.0.0', 'mask': '255.255.0.0'}] ip = struct.unpack('I', socket.inet_aton(ip))[0] for network in priv_subnets: subnet = struct.unpack('I', socket.inet_aton(network['subnet']))[0] mask = struct.unpack('I', socket.inet_aton(network['mask']))[0] if (ip & mask) == (subnet & mask): return True return False def is_public_subnet(ip): """ Utility function to check if an IP address is inside a public subnet. :type ip: ``str`` :param ip: IP address to check :return: ``bool`` if the specified IP address is public. """ return not is_private_subnet(ip=ip) def is_valid_ip_address(address, family=socket.AF_INET): """ Check if the provided address is valid IPv4 or IPv6 address. :param address: IPv4 or IPv6 address to check. :type address: ``str`` :param family: Address family (socket.AF_INTET / socket.AF_INET6). :type family: ``int`` :return: ``bool`` True if the provided address is valid. """ try: socket.inet_pton(family, address) except socket.error: return False return True def join_ipv4_segments(segments): """ Helper method to join ip numeric segment pieces back into a full ip address. :param segments: IPv4 segments to join. :type segments: ``list`` or ``tuple`` :return: IPv4 address. :rtype: ``str`` """ return '.'.join([str(s) for s in segments]) def increment_ipv4_segments(segments): """ Increment an ip address given in quad segments based on ipv4 rules :param segments: IPv4 segments to increment. :type segments: ``list`` or ``tuple`` :return: Incremented segments. :rtype: ``list`` """ segments = [int(segment) for segment in segments] segments[3] += 1 if segments[3] == 256: segments[3] = 0 segments[2] += 1 if segments[2] == 256: segments[2] = 0 segments[1] += 1 if segments[1] == 256: segments[1] = 0 segments[0] += 1 return segments