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45 lines
1.2 KiB
Python
45 lines
1.2 KiB
Python
3 years ago
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import ipaddress
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def reverse_zone(network):
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"""Reverse a network zone"""
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if network.version == 4:
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boundary = 8 # break to the byte
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elif network.version == 6:
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boundary = 4 # break to the nimble
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assert network.prefixlen % boundary == 0
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length = (network.prefixlen // boundary)
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full_network_reverse = network.network_address.reverse_pointer
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splitted = full_network_reverse.split(".")
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splitting_len = int(network.max_prefixlen / boundary)
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splitted = splitted[splitting_len - length:]
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reversed_zone = ".".join(splitted)
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return reversed_zone
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net1 = ipaddress.IPv4Network("10.128.12.0/24")
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net2 = ipaddress.IPv4Network("10.129.0.0/16")
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net3 = ipaddress.IPv4Network("10.0.0.0/8")
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net4 = ipaddress.IPv6Network("2001:470:142:3::/64")
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net5 = ipaddress.IPv6Network("2001:470:142::/48")
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net6 = ipaddress.IPv6Network("2a09:6840::/32")
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#>>> reverse_zone(net1)
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#'12.128.10.in-addr.arpa'
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#>>> reverse_zone(net2)
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#'129.10.in-addr.arpa'
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#>>> reverse_zone(net3)
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#'10.in-addr.arpa'
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#>>> reverse_zone(net4)
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#'3.0.0.0.2.4.1.0.0.7.4.0.1.0.0.2.ip6.arpa'
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#>>> reverse_zone(net5)
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#'2.4.1.0.0.7.4.0.1.0.0.2.ip6.arpa'
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#>>> reverse_zone(net6)
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#'0.4.8.6.9.0.a.2.ip6.arpa'
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