mirror of
https://github.com/NeoCloud/NeoNetwork
synced 2024-11-29 17:20:41 +08:00
27 lines
799 B
Python
27 lines
799 B
Python
|
#!/usr/bin/env python3
|
||
|
|
|
||
|
|
import ipaddress
|
||
|
|
|
||
|
|
ZONE = '.127.10.in-addr.arpa'
|
||
|
|
def truncate(rev: str) -> str:
|
||
|
|
assert rev.endswith(ZONE)
|
||
|
|
rev = rev[:-len(ZONE)]
|
||
|
|
return rev
|
||
|
|
|
||
|
|
def gen_reverse_pointers(network: str, ns: list) -> list:
|
||
|
|
buf = list()
|
||
|
|
net = ipaddress.IPv4Network(network, strict=True)
|
||
|
|
assert net.prefixlen > 24
|
||
|
|
netrev = truncate(net.reverse_pointer)
|
||
|
|
for _ns in ns:
|
||
|
|
buf.append(f"{netrev:<10s} IN NS {_ns}")
|
||
|
|
|
||
|
|
for addr in net:
|
||
|
|
cnamefr = truncate(addr.reverse_pointer)
|
||
|
|
cnameto = f"{int.from_bytes(addr.packed, byteorder='big', signed=False) & 0xff}.{netrev}"
|
||
|
|
buf.append(f"{cnamefr:<10s} IN CNAME {cnameto}")
|
||
|
|
return buf
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
print("\n".join(gen_reverse_pointers('10.127.8.64/26', ['ns1.jerry.neo.'])))
|