anti
f2b3393669
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.
142 lines
5.4 KiB
Python
142 lines
5.4 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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"""Tests for signature matching + scoring."""
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from __future__ import annotations
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import pytest
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from decnet.prober.osfp.p0f.format import _parse_line
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def _obs(**overrides):
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"""Baseline observation (Linux 2.6 on Ethernet), overridable."""
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base = {
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"window": 5840,
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"ttl": 64,
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"df": True,
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"total_len": 60,
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"options_sig": "M1460,S,T,N,W7",
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"quirks": frozenset(),
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"mss": 1460,
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"wscale": 7,
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}
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base.update(overrides)
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return base
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# ─── Match / no-match ────────────────────────────────────────────────────────
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def test_score_exact_match_is_high() -> None:
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sig = _parse_line("5840:64:1:60:M1460,S,T,N,W7:.:Linux:2.6.x literal")
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score = sig.score(_obs())
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assert score is not None
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assert score >= 0.9, f"literal-fields signature should score high, got {score}"
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def test_score_wildcard_match_is_lower_than_literal() -> None:
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literal = _parse_line("5840:64:1:60:M1460,S,T,N,W7:.:Linux:literal")
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wildcard = _parse_line("*:64:1:*:M*,S,T,N,W*:.:Linux:wildcard")
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obs = _obs()
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ls = literal.score(obs)
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ws = wildcard.score(obs)
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assert ls is not None and ws is not None
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assert ls > ws, f"literal ({ls}) should outscore wildcard ({ws})"
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def test_score_window_mismatch_returns_none() -> None:
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sig = _parse_line("5840:64:1:60:M1460,S,T,N,W7:.:Linux:fixed")
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assert sig.score(_obs(window=64240)) is None
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def test_score_ttl_mismatch_returns_none() -> None:
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sig = _parse_line("5840:64:1:60:M1460,S,T,N,W7:.:Linux:ttl64")
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assert sig.score(_obs(ttl=128)) is None
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def test_score_df_mismatch_returns_none() -> None:
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sig = _parse_line("5840:64:1:60:M1460,S,T,N,W7:.:Linux:df-required")
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assert sig.score(_obs(df=False)) is None
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def test_score_df_wildcard_on_signature_matches_either() -> None:
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sig = _parse_line("5840:64:*:60:M1460,S,T,N,W7:.:Linux:any-df")
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assert sig.score(_obs(df=True)) is not None
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assert sig.score(_obs(df=False)) is not None
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def test_score_df_none_on_observation_is_soft_skip() -> None:
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"""When the observation lacks df (sniffer doesn't emit it today),
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a signature with a specific df constraint must still match rather
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than hard-reject. Rationale in the score() docstring."""
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sig = _parse_line("5840:64:1:60:M1460,S,T,N,W7:.:Linux:df-required")
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assert sig.score(_obs(df=None)) is not None
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def test_score_total_len_none_on_observation_is_soft_skip() -> None:
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"""Same soft-field semantics for total_len — the profiler adapter
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passes None when the sniffer / prober didn't capture it."""
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sig = _parse_line("5840:64:1:60:M1460,S,T,N,W7:.:Linux:len-specific")
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assert sig.score(_obs(total_len=None)) is not None
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def test_score_options_order_mismatch_returns_none() -> None:
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sig = _parse_line("5840:64:1:60:M1460,S,T,N,W7:.:Linux:ordered")
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# Same tokens, different order — must NOT match.
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assert sig.score(_obs(options_sig="S,T,M1460,N,W7")) is None
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def test_score_options_missing_token_returns_none() -> None:
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sig = _parse_line("5840:64:1:60:M1460,S,T,N,W7:.:Linux:5opts")
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assert sig.score(_obs(options_sig="M1460,S,T,N")) is None
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def test_score_quirks_must_match_as_set() -> None:
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sig = _parse_line("5840:64:1:60:M*,S,T,N,W*:PZ:Linux:with PZ")
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assert sig.score(_obs(quirks=frozenset({"P", "Z"}))) is not None
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assert sig.score(_obs(quirks=frozenset({"P"}))) is None # missing Z
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assert sig.score(_obs(quirks=frozenset({"P", "Z", "I"}))) is None # extra I
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def test_score_mss_multiple_window() -> None:
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# S4 = 4 * MSS. With MSS=1460 → window=5840.
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sig = _parse_line("S4:64:1:60:M1460,S,T,N,W7:.:Linux:S4")
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assert sig.score(_obs(window=5840, mss=1460)) is not None
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# With MSS=536 → S4 expects window=2144
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assert sig.score(_obs(window=2144, mss=536)) is not None
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assert sig.score(_obs(window=5840, mss=536)) is None
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def test_score_modulo_window() -> None:
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sig = _parse_line("%8192:64:1:60:M1460,S,T,N,W7:.:Linux:mod8192")
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assert sig.score(_obs(window=32768)) is not None
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assert sig.score(_obs(window=40960)) is not None
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assert sig.score(_obs(window=32769)) is None
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def test_score_no_options_sentinel() -> None:
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sig = _parse_line("5840:64:1:60:.:.:Linux:no-opts")
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assert sig.score(_obs(options_sig="")) is not None
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assert sig.score(_obs(options_sig=None)) is not None
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assert sig.score(_obs(options_sig="M1460")) is None
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def test_score_missing_observation_fields_returns_none() -> None:
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"""A signature that requires a specific window can't match when the
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observation has no window. This is the safety invariant —
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sniffer_rollup may call score() with partial data."""
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sig = _parse_line("5840:64:1:60:M1460,S,T,N,W7:.:Linux:strict")
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assert sig.score(_obs(window=None)) is None
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assert sig.score(_obs(ttl=None)) is None
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def test_score_option_value_wildcard_matches_any_literal() -> None:
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sig = _parse_line("5840:64:1:60:M*,S,T,N,W*:.:Linux:wild-mss-wscale")
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assert sig.score(_obs(options_sig="M1460,S,T,N,W7")) is not None
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assert sig.score(_obs(options_sig="M536,S,T,N,W2")) is not None
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def test_score_option_value_modulo() -> None:
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sig = _parse_line("5840:64:1:60:M%4,S,T,N,W7:.:Linux:mss-mod-4")
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assert sig.score(_obs(options_sig="M1460,S,T,N,W7")) is not None # 1460 % 4 == 0
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assert sig.score(_obs(options_sig="M1461,S,T,N,W7")) is None
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