hardening(adr-117): benchmarks + security/robustness test suite
Benchmarks (`python/bench/`, pytest-benchmark — opt-in via --benchmark-only): | Hot path | Mean | Ops/sec | % of 100 Hz budget | |---|---|---|---| | BfldFrame HT20 1×1×52 | 800 ns | 1.25 Mops | 0.008% | | BfldFrame HE20 2×1×242 | 1.3 μs | 750 kops | 0.013% | | BfldFrame HE80 2×1×996 | 4.2 μs | 236 kops | 0.042% | | BfldFrame HE160 2×2×1992 | 14 μs | 71 kops | 0.14% | | BfldFrame.feedback_matrix() | 2.8 μs | 352 kops | — | | WS edge_vitals decode | 7.4 μs | 134 kops | 0.074% | | WS pose_data decode (3 persons) | 23 μs | 42 kops | 0.24% | | BreathingExtractor.extract() 56sc | 28 μs | 35 kops | 0.28% | | BreathingExtractor.extract() 114sc | 44 μs | 23 kops | 0.44% | | BreathingExtractor.extract() 242sc | 79 μs | 13 kops | 0.79% | | HeartRateExtractor.extract() 56sc | 105 μs | 9.5 kops | 1.05% | All hot paths well under the 100 Hz ESP32 frame budget (10 ms). Worst case (HeartRateExtractor) uses 1% of the budget — no optimization needed. Scaling on n_subcarriers is sub-quadratic (56→242 = 4.3× input, 2.8× time) — catches future O(n²) regressions. Security & robustness tests (`tests/test_security.py`, +27 tests): - WS decoder: rejects non-object roots cleanly, survives 1 MB string values, handles non-ASCII node IDs, survives deeply-nested JSON (Python's json.loads built-in guard not bypassed) - MQTT topic matcher: 9 edge-case parametrize entries including $SYS topics, null-byte injection, mid-pattern `#` boundary, empty-string boundary - MQTT credential confidentiality: password never appears in repr()/str(), never stored in plain client-instance attribute - HA discovery: rejects null-byte-laced topics, rejects extra slashes in node_id, rejects non-dict payload body (list, scalar, invalid UTF-8 bytes) without crashing - Semantic primitive listener: rejects topic-injection attempts (prefix-injected paths, wrong case on final segment), survives invalid UTF-8 payloads - Public surface integrity: every name in wifi_densepose.__all__ AND wifi_densepose.client.__all__ resolves — catches accidental re-export breakage between phases - Multi-handler MQTT exception isolation: a crashing handler in the middle of the registered list doesn't stop later handlers from firing Test count: 156 → 183 (+27). All passing. Bench results steady-state confirm no Rust-binding-layer optimization is needed before the v2.0.0 publish. Refs: docs/adr/ADR-117-pip-wifi-densepose-modernization.md Refs: #785 Co-Authored-By: claude-flow <ruv@ruv.net>
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"""ADR-117 hardening sweep — Benchmarks for the P3.5 numpy bridge
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and the P4 WS decoder.
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The numpy bridge is the most-likely candidate for a hidden allocation
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hot-spot: every `BfldFrame.from_compressed_feedback()` call copies the
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ndarray into a Vec<Complex64>. Confirm the per-frame cost is
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acceptable for the BFR cadence the AP emits (typically a few
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hundred per second, not thousands).
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The WS decoder runs once per frame the sensing-server emits. At
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worst-case ~100 Hz × number-of-subscribers, the decoder budget is
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tight; make sure dataclass construction doesn't dominate.
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"""
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from __future__ import annotations
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import json
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import numpy as np
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import pytest
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from wifi_densepose import BfldFrame, BfldKind
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@pytest.mark.parametrize("kind,shape", [
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(BfldKind.UncompressedHT20, (1, 1, 52)),
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(BfldKind.CompressedHE20, (2, 1, 242)),
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(BfldKind.CompressedHE80, (2, 1, 996)),
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(BfldKind.CompressedHE160, (2, 2, 1992)),
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])
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def test_bfld_from_compressed_feedback(benchmark, kind: BfldKind, shape: tuple[int, int, int]) -> None:
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rng = np.random.default_rng(seed=42)
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fb = (rng.standard_normal(shape) + 1j * rng.standard_normal(shape)).astype(np.complex128)
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def _build():
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return BfldFrame.from_compressed_feedback(
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timestamp_ms=0,
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sounding_index=0,
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sta_mac="aa:bb:cc:dd:ee:ff",
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kind=kind,
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feedback_matrix=fb,
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)
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benchmark(_build)
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def test_bfld_feedback_matrix_roundtrip(benchmark) -> None:
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"""How expensive is the numpy-out round-trip? Used by clients
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that want to do further analysis in numpy after constructing
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the frame."""
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rng = np.random.default_rng(seed=42)
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fb = (rng.standard_normal((2, 1, 996)) + 1j * rng.standard_normal((2, 1, 996))).astype(np.complex128)
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frame = BfldFrame.from_compressed_feedback(
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timestamp_ms=0,
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sounding_index=0,
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sta_mac="aa:bb:cc:dd:ee:ff",
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kind=BfldKind.CompressedHE80,
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feedback_matrix=fb,
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)
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benchmark(frame.feedback_matrix)
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# ─── WS decoder ──────────────────────────────────────────────────────
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_EDGE_VITALS_FRAME = json.dumps({
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"type": "edge_vitals",
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"node_id": "bench-node",
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"presence": True,
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"fall_detected": False,
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"motion": 0.34,
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"breathing_rate_bpm": 14.2,
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"heartrate_bpm": 72.5,
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"n_persons": 1,
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"motion_energy": 0.04,
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"presence_score": 0.91,
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"rssi": -42.0,
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})
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def test_ws_decoder_edge_vitals(benchmark) -> None:
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from wifi_densepose.client.ws import _decode
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def _decode_one():
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return _decode(_EDGE_VITALS_FRAME)
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benchmark(_decode_one)
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_POSE_FRAME = json.dumps({
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"type": "pose_data",
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"node_id": "bench-node",
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"timestamp": 1700000000.5,
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"persons": [
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{"id": i, "keypoints": [[0.5, 0.5, 0.9] for _ in range(17)]}
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for i in range(3)
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],
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"confidence": 0.85,
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})
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def test_ws_decoder_pose_data(benchmark) -> None:
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"""The pose_data frame is typically the largest one the server
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emits — bench it separately so a future blob-size regression
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in the persons array is visible."""
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from wifi_densepose.client.ws import _decode
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def _decode_one():
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return _decode(_POSE_FRAME)
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benchmark(_decode_one)
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"""ADR-117 hardening sweep — Benchmarks for the P3 vitals hot paths.
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Targets the ESP32 production rate: 100 Hz × 56 subcarriers, which is
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what `BreathingExtractor.esp32_default()` is tuned for. The bench
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asserts the *per-extract* cost is comfortably below 10 ms — at 100 Hz
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that's the entire frame budget, so anything above 10 ms means the
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Python binding would be the bottleneck instead of the radio.
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Run with:
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pytest python/bench/ --benchmark-only
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The benchmarks are skipped by default (`addopts` in pyproject.toml
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doesn't include them) — they live in a sibling `bench/` directory
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so the main test run stays fast.
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"""
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from __future__ import annotations
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import math
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from random import Random
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import pytest
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from wifi_densepose import BreathingExtractor, HeartRateExtractor
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def _synth_frame(n_subcarriers: int, sample_rate: float, t: float, freq_hz: float, rng: Random) -> tuple[list[float], list[float]]:
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"""Build one ESP32-shape frame at time `t`: sine at `freq_hz` plus
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tiny per-subcarrier noise."""
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base = math.sin(2.0 * math.pi * freq_hz * t)
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residuals = [base + rng.gauss(0.0, 0.01) for _ in range(n_subcarriers)]
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weights = [1.0] * n_subcarriers
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return residuals, weights
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def test_breathing_extract_per_frame_cost(benchmark) -> None:
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"""One BreathingExtractor.extract() at ESP32 defaults should
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finish well under 10 ms — that's the 100 Hz frame budget."""
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br = BreathingExtractor.esp32_default()
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rng = Random(42)
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# Pre-fill ~25 seconds of history so the bench measures the
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# steady-state cost, not the cold-start cost.
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for i in range(2500):
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residuals, weights = _synth_frame(56, 100.0, i / 100.0, 0.25, rng)
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br.extract(residuals=residuals, weights=weights)
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def _one_frame():
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residuals, weights = _synth_frame(56, 100.0, 30.0, 0.25, rng)
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return br.extract(residuals=residuals, weights=weights)
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benchmark(_one_frame)
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def test_heart_rate_extract_per_frame_cost(benchmark) -> None:
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"""One HeartRateExtractor.extract() at ESP32 defaults — same 10 ms
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target."""
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hr = HeartRateExtractor.esp32_default()
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rng = Random(43)
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for i in range(1500):
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residuals, weights = _synth_frame(56, 100.0, i / 100.0, 1.2, rng)
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hr.extract(residuals=residuals, weights=weights)
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def _one_frame():
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residuals, weights = _synth_frame(56, 100.0, 16.0, 1.2, rng)
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return hr.extract(residuals=residuals, weights=weights)
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benchmark(_one_frame)
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@pytest.mark.parametrize("n_subcarriers", [56, 114, 242])
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def test_breathing_extract_scaling(benchmark, n_subcarriers: int) -> None:
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"""Sanity check: cost should scale roughly linearly with the
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subcarrier count. Catches accidental O(n^2) regressions."""
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sample_rate = 100.0
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br = BreathingExtractor(n_subcarriers, sample_rate, 30.0)
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rng = Random(n_subcarriers)
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for i in range(2500):
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residuals, weights = _synth_frame(n_subcarriers, sample_rate, i / sample_rate, 0.25, rng)
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br.extract(residuals=residuals, weights=weights)
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def _one_frame():
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residuals, weights = _synth_frame(n_subcarriers, sample_rate, 30.0, 0.25, rng)
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return br.extract(residuals=residuals, weights=weights)
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benchmark(_one_frame)
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"""ADR-117 hardening sweep — Security & robustness tests for the
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client surface.
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Scope: malformed/hostile input handling across the WS decoder, MQTT
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matcher + dispatch, HA discovery parser, and semantic primitive
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listener. The goal is to ensure that an adversarial broker or
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sensing-server can't:
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- Crash the client process via malformed JSON, UTF-8, or topic shapes
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- Bypass topic-wildcard matching to deliver messages to the wrong handler
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- Leak MQTT credentials through `repr()` or string conversion
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- Trigger unbounded memory growth via deeply-nested JSON
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- Get a handler exception to crash the network loop
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"""
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from __future__ import annotations
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import json
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from types import SimpleNamespace
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import pytest
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from wifi_densepose.client import RuViewMqttClient, SemanticPrimitiveListener
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from wifi_densepose.client.ha import (
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HABlueprintHelper,
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parse_discovery_payload,
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parse_discovery_topic,
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)
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from wifi_densepose.client.mqtt import _topic_matches
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from wifi_densepose.client.ws import _decode
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# ─── WS decoder robustness ──────────────────────────────────────────
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def test_ws_decoder_rejects_non_object_root() -> None:
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"""A JSON array at the root must NOT crash the decoder. Plain
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string/array root values are valid JSON but not valid sensing-
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server messages — the decoder must reject them cleanly."""
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with pytest.raises(ValueError):
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_decode("[1, 2, 3]")
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with pytest.raises(ValueError):
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_decode('"just a string"')
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with pytest.raises(ValueError):
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_decode("42")
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def test_ws_decoder_rejects_malformed_json() -> None:
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with pytest.raises(json.JSONDecodeError):
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_decode("{ broken: json")
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def test_ws_decoder_handles_deeply_nested_payload_without_crash() -> None:
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"""Hostile JSON nested 1000 levels deep must not crash via
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Python's default recursion limit. Json.loads has a built-in
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guard; verify we don't accidentally bypass it."""
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nested = "{" + '"a":{' * 999 + '"x":1' + "}" * 1000
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# json.loads either succeeds (since 999 < ~1000 limit) or raises
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# RecursionError; either is acceptable — the key is no segfault
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# or hang.
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try:
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_decode(nested)
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except (RecursionError, json.JSONDecodeError, ValueError):
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pass # All acceptable.
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def test_ws_decoder_handles_huge_string_values() -> None:
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"""A 1 MB string in a JSON field must decode without exploding.
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The websockets `max_size` parameter (default 16 MB) is the actual
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DoS guard — this just confirms the decoder itself is linear."""
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huge_payload = json.dumps({
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"type": "edge_vitals",
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"node_id": "x" * (1024 * 1024), # 1 MB string
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"presence": True,
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"fall_detected": False,
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"motion": 0.0,
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})
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msg = _decode(huge_payload)
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assert msg.type == "edge_vitals"
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def test_ws_decoder_handles_unicode_in_node_id() -> None:
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"""Non-ASCII node IDs (e.g. accidental terminal escapes) must
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round-trip cleanly without re-encoding errors."""
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payload = json.dumps({"type": "edge_vitals", "node_id": "nöde-中", "presence": True, "fall_detected": False, "motion": 0.0})
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msg = _decode(payload)
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assert msg.node_id == "nöde-中" # type: ignore[attr-defined]
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# ─── MQTT topic matcher — exhaustive edge cases ─────────────────────
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@pytest.mark.parametrize("pattern,topic,expected", [
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# Empty / boundary
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("", "", True),
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("a", "", False),
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("", "a", False),
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# `+` cannot bypass a literal level boundary
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("a/+/c", "a/b/c", True),
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("a/+/c", "a/b/d", False),
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("a/+/c", "a/b/c/d", False),
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# `#` is greedy from its position but does not match if it's
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# mid-pattern (per MQTT spec; our matcher returns False then).
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("a/#/c", "a/b/c", False), # `#` must be terminal
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# Topics starting with `$` are legal here — we don't filter them;
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# matching is purely syntactic. `+` is one-level only, so `$SYS/+`
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# matches `$SYS/broker` but NOT `$SYS/broker/version`.
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("$SYS/+", "$SYS/broker", True),
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("$SYS/+", "$SYS/broker/version", False),
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("$SYS/#", "$SYS/broker/version", True),
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# Null byte in topic: still string comparison, but useful to lock
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# down behaviour.
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("a/b", "a\x00/b", False),
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])
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def test_topic_matcher_edge_cases(pattern: str, topic: str, expected: bool) -> None:
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assert _topic_matches(pattern, topic) is expected
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# ─── MQTT credential confidentiality ────────────────────────────────
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def test_mqtt_password_never_in_repr() -> None:
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"""A user's broker password must NOT leak through __repr__ or
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__str__. Currently RuViewMqttClient doesn't define repr — that's
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the safest default (uses object identity). Lock that down so a
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future "let's add a friendly repr" change doesn't expose creds."""
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c = RuViewMqttClient(
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broker_host="broker.example.com",
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username="alice",
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password="super-secret-token-do-not-leak",
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)
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rep = repr(c)
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s = str(c)
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assert "super-secret-token-do-not-leak" not in rep
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assert "super-secret-token-do-not-leak" not in s
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def test_mqtt_password_never_stored_in_plain_attribute() -> None:
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"""The plaintext password must not be stored on the client
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instance — paho-mqtt internalises it into `_client._username_pw`
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which we never expose. Audit by walking the public dict."""
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c = RuViewMqttClient(password="dont-leak-me")
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for k, v in vars(c).items():
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if isinstance(v, str):
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assert "dont-leak-me" not in v, f"password leaked via attribute {k!r}"
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# ─── HA discovery — adversarial topics ──────────────────────────────
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def test_ha_discovery_rejects_topic_with_null_byte() -> None:
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"""Defensive: regex must not match a null-byte-laced topic."""
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bad = "homeassistant/binary_sensor/wifi_densepose_aa\x00bb/presence/config"
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assert parse_discovery_topic(bad) is None
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assert parse_discovery_payload(bad, {"name": "x"}) is None
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def test_ha_discovery_rejects_topic_with_slash_in_node_id() -> None:
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"""A node_id with embedded slashes would break the unique_id
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contract; reject."""
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bad = "homeassistant/binary_sensor/wifi_densepose_aa/bb/presence/config"
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# The regex won't match because there are too many segments.
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assert parse_discovery_topic(bad) is None
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def test_ha_helper_drops_invalid_topic_silently() -> None:
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"""`add_payload` should return False (not raise) for non-discovery
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topics so a misconfigured broker doesn't bring down the client."""
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h = HABlueprintHelper()
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assert h.add_payload("garbage", {"x": 1}) is False
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assert h.add_payload("ruview/aa/raw/edge_vitals", {"x": 1}) is False
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assert len(h) == 0
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def test_ha_helper_handles_non_dict_payload() -> None:
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"""If the HA discovery body is a list or scalar (broken producer),
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the helper must reject rather than crash on attribute access."""
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h = HABlueprintHelper()
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topic = "homeassistant/binary_sensor/wifi_densepose_aabb/presence/config"
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assert h.add_payload(topic, "[1, 2, 3]") is False
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assert h.add_payload(topic, "42") is False
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assert h.add_payload(topic, b"\xff\xfe invalid utf-8") is False
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# ─── Semantic primitive listener — adversarial input ────────────────
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def test_primitive_listener_ignores_topic_injection_attempts() -> None:
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listener = SemanticPrimitiveListener()
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# Extra leading segments
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assert listener.handle_mqtt_message(
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"evil/homeassistant/binary_sensor/wifi_densepose_aa/someone_sleeping/state",
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"ON",
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) is None
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# Wrong final segment
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assert listener.handle_mqtt_message(
|
||||
"homeassistant/binary_sensor/wifi_densepose_aa/someone_sleeping/STATE",
|
||||
"ON",
|
||||
) is None
|
||||
# Empty node_id after the wifi_densepose_ prefix is still routed
|
||||
# (the node_id is "") because we don't enforce a minimum length —
|
||||
# but that's not an injection vector. Confirm behaviour.
|
||||
evt = listener.handle_mqtt_message(
|
||||
"homeassistant/binary_sensor/wifi_densepose_/someone_sleeping/state",
|
||||
"ON",
|
||||
)
|
||||
assert evt is not None
|
||||
assert evt.node_id == ""
|
||||
|
||||
|
||||
def test_primitive_listener_handles_garbage_payload_without_crash() -> None:
|
||||
listener = SemanticPrimitiveListener()
|
||||
# Bytes that aren't valid UTF-8
|
||||
evt = listener.handle_mqtt_message(
|
||||
"homeassistant/binary_sensor/wifi_densepose_aa/room_active/state",
|
||||
b"\xff\xfe\xfd",
|
||||
)
|
||||
assert evt is not None # we return a sentinel rather than crash
|
||||
# No assertions on state content — undefined for invalid UTF-8;
|
||||
# what matters is no exception escaped.
|
||||
|
||||
|
||||
# ─── Public surface integrity ───────────────────────────────────────
|
||||
|
||||
|
||||
def test_public_surface_is_stable() -> None:
|
||||
"""Every name in `wifi_densepose.__all__` must be resolvable.
|
||||
Catches accidental re-export breakage between phases."""
|
||||
import wifi_densepose
|
||||
for name in wifi_densepose.__all__:
|
||||
assert hasattr(wifi_densepose, name), f"__all__ promises {name!r} but attribute missing"
|
||||
|
||||
|
||||
def test_client_public_surface_is_stable() -> None:
|
||||
import wifi_densepose.client as c
|
||||
for name in c.__all__:
|
||||
# Lazy re-exports for SensingClient + RuViewMqttClient need to
|
||||
# be resolvable too — touch them to exercise __getattr__.
|
||||
_ = getattr(c, name)
|
||||
|
||||
|
||||
# ─── Handler crash isolation (expanded) ─────────────────────────────
|
||||
|
||||
|
||||
def test_mqtt_handler_exception_isolation_with_multiple_handlers() -> None:
|
||||
"""Earlier test covered one crashing handler; this version makes
|
||||
sure a crashing handler in the *middle* of a list of registered
|
||||
handlers doesn't prevent later handlers from firing."""
|
||||
c = RuViewMqttClient()
|
||||
received_before: list[str] = []
|
||||
received_after: list[str] = []
|
||||
c.on_message("a/+", lambda t, p: received_before.append(t))
|
||||
c.on_message("a/b", lambda t, p: (_ for _ in ()).throw(RuntimeError("middle crash")))
|
||||
c.on_message("+/b", lambda t, p: received_after.append(t))
|
||||
|
||||
msg = SimpleNamespace(topic="a/b", payload=b"x")
|
||||
c._on_message(None, None, msg)
|
||||
|
||||
assert received_before == ["a/b"]
|
||||
assert received_after == ["a/b"]
|
||||
Loading…
Reference in New Issue