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255 lines
9.1 KiB
Python
255 lines
9.1 KiB
Python
# -*- coding: utf-8 -*-
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"""验证「手表能不能判断出电脑和自己同网络」的数据链路。
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用户要求：
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手表连上之后，如果发现电脑和自己**在同一个网络**，就切局域网直连；
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不在同一个网络就继续用中转。
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要判断这个，手表需要知道电脑的局域网 IP 和端口。链路是：
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被控端上报 lanIps/port
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-> 中转存在 Device 上
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-> 快照和设备信息里带给手表
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-> 手表拿自己的 IP 比网段
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这个测试验证前三步（Java 那步靠编译 + 代码审查）。
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"""
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from __future__ import annotations
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import json
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import os
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import shutil
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import socket
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import subprocess
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import sys
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import tempfile
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import time
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import urllib.error
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import urllib.request
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from pathlib import Path
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_UA = {"User-Agent": "LanRemote/1.4.0"}
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ROOT = Path(__file__).resolve().parent.parent
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sys.path.insert(0, str(ROOT / "windows"))
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RELAY_PORT = 8096
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BASE = f"http://127.0.0.1:{RELAY_PORT}"
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passed = 0
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failed = 0
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def check(name, ok, detail=""):
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global passed, failed
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if ok:
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passed += 1
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print(" [PASS] " + name)
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else:
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failed += 1
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print(" [FAIL] " + name + " " + str(detail))
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def post(path, payload=None, headers=None):
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body = json.dumps(payload or {}, ensure_ascii=False).encode("utf-8")
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hdrs = dict(_UA)
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hdrs["Content-Type"] = "application/json"
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hdrs.update(headers or {})
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req = urllib.request.Request(BASE + path, data=body, method="POST",
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headers=hdrs)
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try:
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with urllib.request.urlopen(req, timeout=15) as resp:
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return resp.status, json.loads(resp.read().decode("utf-8"))
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except urllib.error.HTTPError as exc:
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raw = exc.read().decode("utf-8", "replace")
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try:
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return exc.code, json.loads(raw)
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except Exception: # noqa: BLE001
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return exc.code, {"raw": raw[:150]}
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def get(path, headers=None):
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hdrs = dict(_UA)
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hdrs.update(headers or {})
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req = urllib.request.Request(BASE + path, headers=hdrs)
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try:
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with urllib.request.urlopen(req, timeout=15) as resp:
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return resp.status, resp.read().decode("utf-8", "replace")
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except urllib.error.HTTPError as exc:
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return exc.code, exc.read().decode("utf-8", "replace")
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def my_lan_ip() -> str:
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"""本机在局域网的地址（和被测控端用的是同一招）。"""
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try:
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probe = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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try:
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probe.connect(("8.8.8.8", 80))
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return probe.getsockname()[0]
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finally:
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probe.close()
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except OSError:
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return ""
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def main() -> int:
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work = Path(tempfile.mkdtemp(prefix="lan_detect_"))
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relay = None
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try:
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relay_data = work / "relaydata"
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relay_data.mkdir(parents=True, exist_ok=True)
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env = dict(os.environ)
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env.update({
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"RELAY_PORT": str(RELAY_PORT), "RELAY_BIND": "127.0.0.1",
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"RELAY_DATA": str(relay_data), "RELAY_POLL": "6",
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"PYTHONIOENCODING": "utf-8", "PYTHONUNBUFFERED": "1",
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})
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relay = subprocess.Popen(
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[sys.executable, "-u", str(ROOT / "relay" / "relay.py")], env=env,
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stdout=open(work / "relay.log", "wb"),
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stderr=subprocess.STDOUT)
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up = False
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for _ in range(40):
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time.sleep(0.5)
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try:
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status, _ = get("/v1/health")
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if status == 200:
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up = True
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break
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except Exception: # noqa: BLE001
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continue
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check("本地中转起来了", up)
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if not up:
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print((work / "relay.log").read_text(encoding="utf-8",
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errors="replace")[-500:])
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return 1
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mine = my_lan_ip()
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print(f" （本机局域网地址：{mine or '拿不到'}）")
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print()
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print("一、被控端上报局域网 IP 和端口")
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status, first = post("/v1/agent/register", {
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"deviceId": "pc-lan", "code": "445566", "name": "带局域网的电脑",
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"version": "1.4.0",
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"lanIps": ["192.168.2.100", "10.0.0.5"],
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"port": 8765})
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check("登记成功", first.get("ok") is True, first)
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status, body = get("/v1/health")
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devices = json.loads(body).get("devices", [])
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target = next((d for d in devices if d.get("deviceId") == "pc-lan"),
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None)
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check("设备在列表里", target is not None, devices)
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if target:
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check("lanIps 存下来了",
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target.get("lanIps") == ["192.168.2.100", "10.0.0.5"],
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target.get("lanIps"))
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check("port 存下来了", target.get("port") == 8765,
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target.get("port"))
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print()
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print("二、手表接入时能拿到这两个值")
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status, attach = post("/v1/client/attach",
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{"code": "445566", "name": "手表"})
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check("接入成功", attach.get("ok") is True, attach)
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check("接入响应里有 lanIps",
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attach.get("lanIps") == ["192.168.2.100", "10.0.0.5"],
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attach.get("lanIps"))
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check("接入响应里有 port", attach.get("port") == 8765,
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attach.get("port"))
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print()
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print("三、脏数据要挡住（不能把乱七八糟的东西转给手表）")
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post("/v1/agent/register", {
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"deviceId": "pc-dirty", "code": "447788", "name": "脏数据",
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"version": "1.4.0",
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"lanIps": ["192.168.1.1", "not-an-ip", "999.1.1.1",
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"<script>", "", "10.0.0.1", 12345],
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"port": 99999})
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status, body = get("/v1/health")
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dirty = next((d for d in json.loads(body).get("devices", [])
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if d.get("deviceId") == "pc-dirty"), None)
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check("脏数据设备在列表里", dirty is not None)
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if dirty:
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check("只留下合法 IPv4",
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dirty.get("lanIps") == ["192.168.1.1", "10.0.0.1"],
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dirty.get("lanIps"))
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check("非法端口归零（手表就不会试着直连）",
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dirty.get("port") == 0, dirty.get("port"))
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print()
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print("四、被控端真的会算自己的局域网 IP")
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from lanremote.config import Store
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from lanremote.relay import RelayLink
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store = Store(work / "store")
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store.set_pairing_code("556677")
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store.set("server_name", "本机")
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store.set("port", 8877)
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link = RelayLink(store, log=lambda _m: None)
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ips = link._lan_ips()
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check("算出了至少一个局域网 IP", len(ips) >= 1, ips)
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check("算出来的都是 IPv4",
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all(len(x.split(".")) == 4 for x in ips), ips)
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check("不含回环地址",
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all(not x.startswith("127.") for x in ips), ips)
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if mine:
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check("算出来的和本机实际地址一致（或包含它）",
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mine in ips or any(
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x.rsplit(".", 1)[0] == mine.rsplit(".", 1)[0]
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for x in ips),
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f"实际 {mine}，算出 {ips}")
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print()
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print("五、同网段判断逻辑（手表的算法，这里用 Python 复刻验证）")
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def same_subnet(a, b):
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pa, pb = a.split("."), b.split(".")
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if len(pa) != 4 or len(pb) != 4:
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return False
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return pa[:3] == pb[:3]
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cases = [
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("192.168.2.10", "192.168.2.100", True),
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("192.168.2.10", "192.168.3.100", False),
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("10.0.0.5", "10.0.0.9", True),
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("10.0.0.5", "192.168.1.9", False),
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]
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for a, b, expect in cases:
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got = same_subnet(a, b)
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check(f"{a} vs {b} -> {'同网段' if expect else '不同网段'}",
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got is expect, got)
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print()
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print("六、挑地址：多个网卡时挑同网段的那个")
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def pick(device_ips, my_ip):
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for device_ip in device_ips:
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if same_subnet(device_ip, my_ip):
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return device_ip
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return None
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check("有两个候选时挑中同网段的",
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pick(["10.0.0.5", "192.168.2.50"], "192.168.2.10")
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== "192.168.2.50")
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check("都不在同一个网段时返回空（继续用中转）",
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pick(["10.0.0.5", "172.16.1.1"], "192.168.2.10") is None)
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print()
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print("=" * 62)
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print(f"通过 {passed} 项，失败 {failed} 项")
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return 0 if failed == 0 else 1
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finally:
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if relay is not None:
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try:
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relay.terminate()
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relay.wait(timeout=8)
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except Exception: # noqa: BLE001
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try:
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relay.kill()
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except Exception: # noqa: BLE001
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pass
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time.sleep(0.5)
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shutil.rmtree(work, ignore_errors=True)
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if __name__ == "__main__":
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raise SystemExit(main())
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