Files
DECNET/decnet/asn/base.py
anti f2b3393669 chore: relicense to AGPL-3.0-or-later and add SPDX headers
Replaces LICENSE (GPLv3 -> AGPLv3) and prepends
`SPDX-License-Identifier: AGPL-3.0-or-later` to every source file
across decnet/, decnet_web/, tests/, scripts/, and tools/.

Rationale: closes the GPLv3 ASP loophole so any party operating a
modified DECNET as a network service must offer their modified
source. Personal copyright (Samuel Paschuan) + inbound=outbound
contributions make a future unilateral relicense infeasible.

- LICENSE: full AGPL-3.0 text (gnu.org/licenses/agpl-3.0.txt)
- COPYRIGHT: project copyright notice
- tools/add_spdx_headers.py: idempotent header injector
  (shebang- and PEP 263-aware)

Touches 1565 source files (.py, .ts, .tsx, .js, .jsx, .css, .sh).
No behavior change; comments only.
2026-05-22 21:04:16 -04:00

35 lines
1.0 KiB
Python

# SPDX-License-Identifier: AGPL-3.0-or-later
"""ASN provider protocol — mirror of :mod:`decnet.geoip.base`.
Concrete providers (e.g. :mod:`decnet.asn.iptoasn`) implement this.
Callers must go through :func:`decnet.asn.factory.get_provider`; never
import a concrete provider class directly.
"""
from __future__ import annotations
from abc import ABC, abstractmethod
from pathlib import Path
from typing import Sequence
from decnet.asn.lookup import AsnLookup
class Provider(ABC):
"""Abstract IP→ASN data provider."""
#: Short tag written to ``Attacker.asn_source`` (e.g. ``'iptoasn'``).
name: str
@abstractmethod
def refresh(self) -> None:
"""Download / regenerate the provider's raw data files."""
@abstractmethod
def build_lookup(self) -> AsnLookup:
"""Parse the on-disk data files and return a ready-to-query lookup."""
@abstractmethod
def data_paths(self) -> Sequence[Path]:
"""Return the list of files this provider manages — used for staleness
detection. Order is not significant."""