#!/usr/bin/env python3
import sys
from ipaddress import IPv4Address, ip_network
from pathlib import Path
import toml
RESOLVE_FILE = Path("dns", "db.10.127")
ROUTE_FILE = Path("route")
def iter_route(route_type: str):
items = []
for f in ROUTE_FILE.iterdir():
routes = toml.loads(f.read_text())
items.extend(
(entity["name"], ip_network(route).network_address)
for route, entity in routes.items()
if entity["type"] == route_type
)
return sorted(items, key=lambda item: item[1])
def main():
orignal = RESOLVE_FILE.read_text()
orignal = orignal[: orignal.find("\n; AUTOGENERATED")]
records = [orignal, "; AUTOGENERATED", "", "; Loopback Addresses"]
for name, address in iter_route("loopback"):
if isinstance(address, IPv4Address):
pointer = address.reverse_pointer.replace(".127.10.in-addr.arpa", "")
records.append("%s\tIN\tPTR\t%s.neo." % (pointer, name))
RESOLVE_FILE.write_text("\n".join(records))
if __name__ == "__main__":
main()
