17 lines
1.1 KiB
Python
17 lines
1.1 KiB
Python
 
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"""Только чтение: адреса сети и broadcast, уже записанные в БД (IPv4, префикс ≤ /30). Запуск: venv/bin/python scripts/find_unusable_addresses.py"""
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import ipaddress
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import pathlib
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import psycopg
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env = dict(l.split("=", 1) for l in pathlib.Path(__file__).resolve().parent.parent.joinpath(".env").read_text().split() if "=" in l)
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dsn = f"postgresql://{env['POSTGRES_USER']}:{env['POSTGRES_PASSWORD']}@127.0.0.1:{env['DB_HOST_PORT']}/{env['POSTGRES_DB']}"
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with psycopg.connect(dsn) as conn:
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rows = conn.execute("SELECT a.id, host(a.address), p.prefix::text, o.name FROM addresses a JOIN prefixes p ON p.id = a.prefix_id JOIN organizations o ON o.id = p.organization_id ORDER BY a.id").fetchall()
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found = 0
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for aid, ip, cidr, org in rows:
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net, addr = ipaddress.ip_network(cidr), ipaddress.ip_address(ip)
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if net.version == 4 and net.prefixlen <= 30 and addr in (net.network_address, net.broadcast_address):
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found += 1
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print(f"address id={aid} {ip} в {cidr} ({org}) — {'адрес сети' if addr == net.network_address else 'broadcast'}")
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print(f"найдено: {found}")
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