mirror of
https://github.com/NeoCloud/NeoNetwork
synced 2024-11-29 23:20:41 +08:00
27 lines
799 B
Python
27 lines
799 B
Python
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#!/usr/bin/env python3
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import ipaddress
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ZONE = '.127.10.in-addr.arpa'
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def truncate(rev: str) -> str:
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assert rev.endswith(ZONE)
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rev = rev[:-len(ZONE)]
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return rev
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def gen_reverse_pointers(network: str, ns: list) -> list:
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buf = list()
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net = ipaddress.IPv4Network(network, strict=True)
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assert net.prefixlen > 24
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netrev = truncate(net.reverse_pointer)
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for _ns in ns:
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buf.append(f"{netrev:<10s} IN NS {_ns}")
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for addr in net:
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cnamefr = truncate(addr.reverse_pointer)
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cnameto = f"{int.from_bytes(addr.packed, byteorder='big', signed=False) & 0xff}.{netrev}"
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buf.append(f"{cnamefr:<10s} IN CNAME {cnameto}")
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return buf
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if __name__ == "__main__":
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print("\n".join(gen_reverse_pointers('10.127.8.64/26', ['ns1.jerry.neo.'])))
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