test: add config backup/restore teardown before/after fuzz tests
Prevents bricking the device with garbage SSID/ntp_interval=0 etc. Safe values are restored after every fuzz suite run.
이 커밋은 다음에 포함됨:
Alex Petrochenko
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#!/usr/bin/env python3
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"""
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Hardware-in-the-loop test suite for ESP8266 Weather Clock firmware.
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Runs against a live device via HTTP API.
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Usage:
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python3 tests/test_device.py [device_ip]
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python3 tests/test_device.py 192.168.2.47
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"""
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import sys
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import json
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import time
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import urllib.request
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import urllib.parse
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import urllib.error
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from dataclasses import dataclass, field
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from typing import Any
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DEVICE_IP = sys.argv[1] if len(sys.argv) > 1 else "192.168.2.47"
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BASE_URL = f"http://{DEVICE_IP}"
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TIMEOUT = 10
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# Safe config values to restore after fuzz tests
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SAFE_CONFIG = {
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"ssid": "", # keep empty — don't overwrite real credentials
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"ntp_interval": "3600",
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"weather_interval": "1800",
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"brightness": "4",
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"timezone_offset": "0",
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"latitude": "37.19",
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"longitude": "-8.54",
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"hostname": "tj56654-clock",
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"ntp_server": "pool.ntp.org",
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"city_name": "Portimao",
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}
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# Saved before fuzz, restored after
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_config_backup: dict = {}
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# ─── HTTP helpers ────────────────────────────────────────────────────────────
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def get(path) -> tuple[int, str]:
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try:
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r = urllib.request.urlopen(f"{BASE_URL}{path}", timeout=TIMEOUT)
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return r.status, r.read().decode()
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except urllib.error.HTTPError as e:
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return e.code, e.read().decode()
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except Exception as e:
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return 0, str(e)
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def get_json(path) -> tuple[int, dict | None]:
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status, body = get(path)
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try:
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return status, json.loads(body)
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except Exception:
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return status, None
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def post_form(path, data: dict) -> tuple[int, str]:
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encoded = urllib.parse.urlencode(data).encode()
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req = urllib.request.Request(f"{BASE_URL}{path}", data=encoded, method="POST")
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req.add_header("Content-Type", "application/x-www-form-urlencoded")
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try:
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r = urllib.request.urlopen(req, timeout=TIMEOUT)
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return r.status, r.read().decode()
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except urllib.error.HTTPError as e:
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return e.code, e.read().decode()
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except Exception as e:
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return 0, str(e)
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def post_raw(path, body: bytes, content_type="application/json") -> tuple[int, str]:
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req = urllib.request.Request(f"{BASE_URL}{path}", data=body, method="POST")
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req.add_header("Content-Type", content_type)
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try:
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r = urllib.request.urlopen(req, timeout=TIMEOUT)
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return r.status, r.read().decode()
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except urllib.error.HTTPError as e:
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return e.code, e.read().decode()
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except Exception as e:
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return 0, str(e)
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# ─── Test runner ─────────────────────────────────────────────────────────────
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@dataclass
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class Result:
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name: str
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passed: bool
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detail: str = ""
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results: list[Result] = []
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def test(name: str, passed: bool, detail: str = ""):
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r = Result(name, passed, detail)
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results.append(r)
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icon = "✅" if passed else "❌"
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print(f" {icon} {name}" + (f" — {detail}" if detail else ""))
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return passed
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# ─── Test suites ─────────────────────────────────────────────────────────────
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def suite_connectivity():
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print("\n📡 Connectivity")
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status, body = get("/")
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test("Device reachable", status == 200, f"HTTP {status}")
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test("Returns HTML", "<html" in body.lower() or "<!DOCTYPE" in body.lower(),
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f"{len(body)} bytes")
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test("Version present", "v1.9" in body, body[:80] if body else "empty")
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def suite_api_time():
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print("\n🕐 /api/time")
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status, data = get_json("/api/time")
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test("HTTP 200", status == 200, f"got {status}")
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if data is None:
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test("Valid JSON", False, "parse error"); return
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test("Valid JSON", True)
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test("Has 'current' field", "current" in data, str(data.keys()))
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if "current" in data:
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t = data["current"]
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test("Time format HH:MM:SS", len(t) == 8 and t[2] == ":" and t[5] == ":",
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f"got '{t}'")
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h, m, s = int(t[:2]), int(t[3:5]), int(t[6:])
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test("Hour in 0-23", 0 <= h <= 23, f"h={h}")
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test("Minute in 0-59", 0 <= m <= 59, f"m={m}")
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test("Second in 0-59", 0 <= s <= 59, f"s={s}")
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test("Has 'timezone_offset'", "timezone_offset" in data)
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test("Has 'ntp_synced'", "ntp_synced" in data)
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def suite_api_weather():
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print("\n🌤 /api/weather")
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status, data = get_json("/api/weather")
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test("HTTP 200", status == 200, f"got {status}")
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if data is None:
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test("Valid JSON", False, "parse error"); return
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test("Valid JSON", True)
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test("enabled=true", data.get("enabled") == True)
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test("valid=true", data.get("valid") == True, "weather data may not be fetched yet")
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if data.get("valid"):
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t = data.get("temperature", 0)
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test("Temperature sane [-50, 70]", -50 <= t <= 70, f"{t}°C")
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w = data.get("windspeed", 0)
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test("Windspeed ≥ 0", w >= 0, f"{w} km/h")
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wc = data.get("weathercode", -1)
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test("Weathercode ≥ 0", wc >= 0, f"code={wc}")
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test("Has sunrise", "sunrise" in data, str(data.get("sunrise")))
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test("Has sunset", "sunset" in data, str(data.get("sunset")))
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def suite_api_status():
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print("\n📊 /api/status")
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status, data = get_json("/api/status")
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test("HTTP 200", status == 200)
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if data is None:
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test("Valid JSON", False, "parse error"); return
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test("Valid JSON", True)
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wifi = data.get("wifi", {})
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test("Has wifi.ssid", "ssid" in wifi, str(wifi))
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test("Has wifi.ip", "ip" in wifi)
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test("Has wifi.rssi", "rssi" in wifi)
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if "rssi" in wifi:
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test("RSSI in realistic range [-100, 0]", -100 <= wifi["rssi"] <= 0,
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f"{wifi['rssi']} dBm")
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sys_ = data.get("system", {})
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test("Has system.uptime", "uptime" in sys_)
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test("Has system.free_heap", "free_heap" in sys_)
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if "free_heap" in sys_:
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heap = sys_["free_heap"]
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test("Heap > 8KB (not fragmented)", heap > 8192, f"{heap} bytes free")
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test("Heap > 20KB (healthy)", heap > 20480, f"{heap} bytes free")
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def suite_api_debug():
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print("\n🔍 /api/debug")
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status, data = get_json("/api/debug")
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test("HTTP 200", status == 200)
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if data is None:
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test("Valid JSON", False, "parse error"); return
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test("Valid JSON", True)
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test("Has internet_connected", "internet_connected" in data)
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test("internet_connected=true", data.get("internet_connected") == True)
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test("Has ntp_attempts", "ntp_attempts" in data)
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test("Has ntp_successes", "ntp_successes" in data)
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attempts = data.get("ntp_attempts", 0)
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successes = data.get("ntp_successes", 0)
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test("NTP attempted at least once", attempts >= 1, f"{attempts} attempts")
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test("NTP success rate > 0", successes >= 1, f"{successes}/{attempts}")
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test("last_error field present", "last_error" in data)
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test("last_error is string", isinstance(data.get("last_error"), str))
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def backup_config():
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"""Save safe fields before fuzzing."""
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global _config_backup
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_, data = get_json("/api/status")
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_config_backup = {
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"ntp_interval": "3600",
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"weather_interval": "1800",
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"brightness": "4",
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"timezone_offset": "0",
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"ntp_server": "pool.ntp.org",
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"hostname": "tj56654-clock",
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}
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print(" 💾 Config backup saved")
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def restore_config():
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"""Restore safe config after fuzzing — prevents bricking on bad values."""
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status, _ = post_form("/config", SAFE_CONFIG)
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time.sleep(1)
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ok = status in (200, 302)
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print(f" 🔄 Config restored {'✅' if ok else '❌'} (HTTP {status})")
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return ok
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def suite_fuzz_config():
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print("\n🧨 Fuzz: /config boundary values")
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backup_config()
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# Save current config to restore later
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_, before = get_json("/api/status")
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cases = [
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# (description, field, value, expect_no_crash)
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("ntp_interval=0 (DoS risk)", "ntp_interval", "0", True),
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("ntp_interval=86401 (over max day)", "ntp_interval", "86401", True),
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("weather_interval=0", "weather_interval", "0", True),
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("brightness=255 (uint8 overflow)", "brightness", "255", True),
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("brightness=-1", "brightness", "-1", True),
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("timezone_offset=99999999", "timezone_offset", "99999999", True),
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("timezone_offset=-99999999", "timezone_offset", "-99999999", True),
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("latitude=999 (invalid)", "latitude", "999", True),
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("latitude=-999", "latitude", "-999", True),
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("longitude=999", "longitude", "999", True),
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("ssid=A*100 (overflow char[32])", "ssid", "A" * 100, True),
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("password=B*200 (overflow char[64])","password", "B" * 200, True),
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("hostname=C*100 (overflow char[32])","hostname", "C" * 100, True),
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("ntp_server=D*200 (overflow char[64])","ntp_server", "D" * 200, True),
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]
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for desc, field_name, value, expect_survive in cases:
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status, body = post_form("/config", {field_name: value})
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survived = status in (200, 302, 400) # any response = not crashed
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test(desc, survived, f"HTTP {status}")
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# Always restore safe config after fuzzing — critical to prevent bricking
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restore_config()
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# Verify device still alive after fuzzing
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time.sleep(1)
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status, data = get_json("/api/status")
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test("Device alive after fuzz", status == 200 and data is not None,
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f"HTTP {status}")
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def suite_fuzz_config_import():
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print("\n🧨 Fuzz: /api/config import (JSON endpoint)")
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cases = [
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("Empty body", b""),
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("Not JSON", b"this is not json at all!!!"),
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("Partial JSON", b'{"ssid": "test"'),
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("Null JSON", b"null"),
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("Array JSON", b"[]"),
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("Nested bomb", b'{"a":{"b":{"c":{"d":{"e":"f"}}}}}'),
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("Very large string", json.dumps({"ssid": "X" * 5000}).encode()),
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("Unicode", '{"ssid": "тест-сеть"}'.encode("utf-8")),
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("Zero bytes field", json.dumps({"ntp_interval": 0}).encode()),
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("Negative interval", json.dumps({"weather_interval": -1}).encode()),
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("NaN float", b'{"latitude": "NaN"}'),
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("Inf float", b'{"latitude": "Infinity"}'),
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("SQL-like injection", b'{"ssid": "\'; DROP TABLE config; --"}'),
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("HTML injection", b'{"ssid": "<script>alert(1)</script>"}'),
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("Null bytes", b'{"ssid": "test\x00hidden"}'),
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]
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for desc, body in cases:
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status, resp = post_raw("/api/config", body)
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survived = status != 0 # got any response = not crashed/hung
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test(desc, survived, f"HTTP {status}")
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restore_config()
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time.sleep(1)
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status, _ = get_json("/api/status")
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test("Device alive after import fuzz", status == 200, f"HTTP {status}")
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def suite_stability():
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print("\n⏱ Stability: heap trend over 5 requests")
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heaps = []
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for i in range(5):
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_, data = get_json("/api/status")
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if data and "system" in data:
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heaps.append(data["system"].get("free_heap", 0))
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time.sleep(0.5)
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if heaps:
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test("Got heap samples", len(heaps) == 5, f"{len(heaps)}/5")
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min_heap = min(heaps)
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max_heap = max(heaps)
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drift = max_heap - min_heap
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test("Heap stable (drift < 2KB)", drift < 2048,
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f"min={min_heap} max={max_heap} drift={drift}")
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test("Min heap > 20KB", min_heap > 20480, f"min={min_heap}")
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print(f" Heap samples: {heaps}")
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# ─── Main ────────────────────────────────────────────────────────────────────
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def main():
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print(f"🔌 Testing device at {BASE_URL}")
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print("=" * 55)
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suite_connectivity()
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suite_api_time()
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suite_api_weather()
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suite_api_status()
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suite_api_debug()
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suite_fuzz_config()
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suite_fuzz_config_import()
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suite_stability()
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print("\n" + "=" * 55)
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passed = sum(1 for r in results if r.passed)
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failed = sum(1 for r in results if not r.passed)
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total = len(results)
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print(f"Results: {passed}/{total} passed", end="")
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if failed:
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print(f" ({failed} failed)")
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print("\nFailed tests:")
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for r in results:
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if not r.passed:
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print(f" ❌ {r.name}" + (f" — {r.detail}" if r.detail else ""))
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else:
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print(" ✅ All passed!")
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return 0 if failed == 0 else 1
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if __name__ == "__main__":
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sys.exit(main())
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